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7fa57a0cd9
ztxdone is jumped to even if tty is NULL and tty_wakeup placed after this label doesn't expect NULLed parameter, so this will cause an oops in some situations (why they scheduled a wakeup there before remove bottom half processing patch?). wakeup only in the case when we have non-null tty struct. Spotted by Adrian Bunk. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5422 lines
155 KiB
C
5422 lines
155 KiB
C
#undef BLOCKMOVE
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#define Z_WAKE
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#undef Z_EXT_CHARS_IN_BUFFER
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/*
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* linux/drivers/char/cyclades.c
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*
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* This file contains the driver for the Cyclades async multiport
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* serial boards.
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*
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* Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
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* Modified and maintained by Marcio Saito <marcio@cyclades.com>.
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*
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* Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
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*
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* Much of the design and some of the code came from serial.c
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* which was copyright (C) 1991, 1992 Linus Torvalds. It was
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* extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
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* and then fixed as suggested by Michael K. Johnson 12/12/92.
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* Converted to pci probing and cleaned up by Jiri Slaby.
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*
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* This version supports shared IRQ's (only for PCI boards).
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*
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* $Log: cyclades.c,v $
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* Prevent users from opening non-existing Z ports.
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*
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* Revision 2.3.2.8 2000/07/06 18:14:16 ivan
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* Fixed the PCI detection function to work properly on Alpha systems.
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* Implemented support for TIOCSERGETLSR ioctl.
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* Implemented full support for non-standard baud rates.
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*
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* Revision 2.3.2.7 2000/06/01 18:26:34 ivan
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* Request PLX I/O region, although driver doesn't use it, to avoid
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* problems with other drivers accessing it.
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* Removed count for on-board buffer characters in cy_chars_in_buffer
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* (Cyclades-Z only).
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*
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* Revision 2.3.2.6 2000/05/05 13:56:05 ivan
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* Driver now reports physical instead of virtual memory addresses.
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* Masks were added to some Cyclades-Z read accesses.
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* Implemented workaround for PLX9050 bug that would cause a system lockup
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* in certain systems, depending on the MMIO addresses allocated to the
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* board.
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* Changed the Tx interrupt programming in the CD1400 chips to boost up
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* performance (Cyclom-Y only).
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* Code is now compliant with the new module interface (module_[init|exit]).
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* Make use of the PCI helper functions to access PCI resources.
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* Did some code "housekeeping".
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*
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* Revision 2.3.2.5 2000/01/19 14:35:33 ivan
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* Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
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*
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* Revision 2.3.2.4 2000/01/17 09:19:40 ivan
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* Fixed SMP locking in Cyclom-Y interrupt handler.
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*
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* Revision 2.3.2.3 1999/12/28 12:11:39 ivan
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* Added a new cyclades_card field called nports to allow the driver to
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* know the exact number of ports found by the Z firmware after its load;
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* RX buffer contention prevention logic on interrupt op mode revisited
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* (Cyclades-Z only);
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* Revisited printk's for Z debug;
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* Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
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*
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* Revision 2.3.2.2 1999/10/01 11:27:43 ivan
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* Fixed bug in cyz_poll that would make all ports but port 0
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* unable to transmit/receive data (Cyclades-Z only);
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* Implemented logic to prevent the RX buffer from being stuck with data
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* due to a driver / firmware race condition in interrupt op mode
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* (Cyclades-Z only);
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* Fixed bug in block_til_ready logic that would lead to a system crash;
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* Revisited cy_close spinlock usage;
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*
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* Revision 2.3.2.1 1999/09/28 11:01:22 ivan
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* Revisited CONFIG_PCI conditional compilation for PCI board support;
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* Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
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* _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
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* Removed CTS handling from the driver -- this is now completely handled
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* by the firmware (Cyclades-Z only);
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* Flush RX on-board buffers on a port open (Cyclades-Z only);
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* Fixed handling of ASYNC_SPD_* TTY flags;
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* Module unload now unmaps all memory area allocated by ioremap;
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*
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* Revision 2.3.1.1 1999/07/15 16:45:53 ivan
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* Removed CY_PROC conditional compilation;
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* Implemented SMP-awareness for the driver;
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* Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
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* functions;
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* The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
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* (irq=NN) as parameters (only for ISA boards);
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* Fixed bug in set_line_char that would prevent the Cyclades-Z
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* ports from being configured at speeds above 115.2Kbps;
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* Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
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* switching from working properly;
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* The driver now only prints IRQ info for the Cyclades-Z if it's
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* configured to work in interrupt mode;
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*
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* Revision 2.2.2.3 1999/06/28 11:13:29 ivan
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* Added support for interrupt mode operation for the Z cards;
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* Removed the driver inactivity control for the Z;
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* Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
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* the Z firmware is not loaded yet;
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* Replaced the "manual" Z Tx flush buffer by a call to a FW command of
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* same functionality;
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* Implemented workaround for IRQ setting loss on the PCI configuration
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* registers after a PCI bridge EEPROM reload (affects PLX9060 only);
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*
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* Revision 2.2.2.2 1999/05/14 17:18:15 ivan
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* /proc entry location changed to /proc/tty/driver/cyclades;
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* Added support to shared IRQ's (only for PCI boards);
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* Added support for Cobalt Qube2 systems;
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* IRQ [de]allocation scheme revisited;
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* BREAK implementation changed in order to make use of the 'break_ctl'
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* TTY facility;
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* Fixed typo in TTY structure field 'driver_name';
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* Included a PCI bridge reset and EEPROM reload in the board
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* initialization code (for both Y and Z series).
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*
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* Revision 2.2.2.1 1999/04/08 16:17:43 ivan
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* Fixed a bug in cy_wait_until_sent that was preventing the port to be
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* closed properly after a SIGINT;
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* Module usage counter scheme revisited;
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* Added support to the upcoming Y PCI boards (i.e., support to additional
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* PCI Device ID's).
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*
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* Revision 2.2.1.10 1999/01/20 16:14:29 ivan
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* Removed all unnecessary page-alignement operations in ioremap calls
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* (ioremap is currently safe for these operations).
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*
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* Revision 2.2.1.9 1998/12/30 18:18:30 ivan
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* Changed access to PLX PCI bridge registers from I/O to MMIO, in
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* order to make PLX9050-based boards work with certain motherboards.
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*
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* Revision 2.2.1.8 1998/11/13 12:46:20 ivan
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* cy_close function now resets (correctly) the tty->closing flag;
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* JIFFIES_DIFF macro fixed.
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*
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* Revision 2.2.1.7 1998/09/03 12:07:28 ivan
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* Fixed bug in cy_close function, which was not informing HW of
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* which port should have the reception disabled before doing so;
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* fixed Cyclom-8YoP hardware detection bug.
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*
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* Revision 2.2.1.6 1998/08/20 17:15:39 ivan
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* Fixed bug in cy_close function, which causes malfunction
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* of one of the first 4 ports when a higher port is closed
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* (Cyclom-Y only).
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*
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* Revision 2.2.1.5 1998/08/10 18:10:28 ivan
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* Fixed Cyclom-4Yo hardware detection bug.
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*
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* Revision 2.2.1.4 1998/08/04 11:02:50 ivan
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* /proc/cyclades implementation with great collaboration of
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* Marc Lewis <marc@blarg.net>;
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* cyy_interrupt was changed to avoid occurrence of kernel oopses
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* during PPP operation.
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*
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* Revision 2.2.1.3 1998/06/01 12:09:10 ivan
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* General code review in order to comply with 2.1 kernel standards;
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* data loss prevention for slow devices revisited (cy_wait_until_sent
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* was created);
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* removed conditional compilation for new/old PCI structure support
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* (now the driver only supports the new PCI structure).
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*
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* Revision 2.2.1.1 1998/03/19 16:43:12 ivan
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* added conditional compilation for new/old PCI structure support;
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* removed kernel series (2.0.x / 2.1.x) conditional compilation.
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*
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* Revision 2.1.1.3 1998/03/16 18:01:12 ivan
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* cleaned up the data loss fix;
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* fixed XON/XOFF handling once more (Cyclades-Z);
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* general review of the driver routines;
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* introduction of a mechanism to prevent data loss with slow
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* printers, by forcing a delay before closing the port.
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*
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* Revision 2.1.1.2 1998/02/17 16:50:00 ivan
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* fixed detection/handling of new CD1400 in Ye boards;
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* fixed XON/XOFF handling (Cyclades-Z);
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* fixed data loss caused by a premature port close;
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* introduction of a flag that holds the CD1400 version ID per port
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* (used by the CYGETCD1400VER new ioctl).
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*
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* Revision 2.1.1.1 1997/12/03 17:31:19 ivan
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* Code review for the module cleanup routine;
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* fixed RTS and DTR status report for new CD1400's in get_modem_info;
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* includes anonymous changes regarding signal_pending.
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*
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* Revision 2.1 1997/11/01 17:42:41 ivan
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* Changes in the driver to support Alpha systems (except 8Zo V_1);
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* BREAK fix for the Cyclades-Z boards;
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* driver inactivity control by FW implemented;
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* introduction of flag that allows driver to take advantage of
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* a special CD1400 feature related to HW flow control;
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* added support for the CD1400 rev. J (Cyclom-Y boards);
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* introduction of ioctls to:
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* - control the rtsdtr_inv flag (Cyclom-Y);
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* - control the rflow flag (Cyclom-Y);
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* - adjust the polling interval (Cyclades-Z);
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*
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* Revision 1.36.4.33 1997/06/27 19:00:00 ivan
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* Fixes related to kernel version conditional
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* compilation.
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*
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* Revision 1.36.4.32 1997/06/14 19:30:00 ivan
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* Compatibility issues between kernels 2.0.x and
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* 2.1.x (mainly related to clear_bit function).
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*
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* Revision 1.36.4.31 1997/06/03 15:30:00 ivan
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* Changes to define the memory window according to the
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* board type.
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*
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* Revision 1.36.4.30 1997/05/16 15:30:00 daniel
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* Changes to support new cycladesZ boards.
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*
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* Revision 1.36.4.29 1997/05/12 11:30:00 daniel
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* Merge of Bentson's and Daniel's version 1.36.4.28.
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* Corrects bug in cy_detect_pci: check if there are more
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* ports than the number of static structs allocated.
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* Warning message during initialization if this driver is
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* used with the new generation of cycladesZ boards. Those
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* will be supported only in next release of the driver.
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* Corrects bug in cy_detect_pci and cy_detect_isa that
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* returned wrong number of VALID boards, when a cyclomY
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* was found with no serial modules connected.
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* Changes to use current (2.1.x) kernel subroutine names
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* and created macros for compilation with 2.0.x kernel,
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* instead of the other way around.
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*
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* Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
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* Change queue_task_irq_off to queue_task_irq.
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* The inline function queue_task_irq_off (tqueue.h)
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* was removed from latest releases of 2.1.x kernel.
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* Use of macro __init to mark the initialization
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* routines, so memory can be reused.
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* Also incorporate implementation of critical region
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* in function cleanup_module() created by anonymous
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* linuxer.
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*
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* Revision 1.36.4.28 1997/04/25 16:00:00 daniel
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* Change to support new firmware that solves DCD problem:
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* application could fail to receive SIGHUP signal when DCD
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* varying too fast.
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*
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* Revision 1.36.4.27 1997/03/26 10:30:00 daniel
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* Changed for support linux versions 2.1.X.
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* Backward compatible with linux versions 2.0.X.
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* Corrected illegal use of filler field in
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* CH_CTRL struct.
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* Deleted some debug messages.
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*
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* Revision 1.36.4.26 1997/02/27 12:00:00 daniel
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* Included check for NULL tty pointer in cyz_poll.
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*
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* Revision 1.36.4.25 1997/02/26 16:28:30 bentson
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* Bill Foster at Blarg! Online services noticed that
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* some of the switch elements of -Z modem control
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* lacked a closing "break;"
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*
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* Revision 1.36.4.24 1997/02/24 11:00:00 daniel
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* Changed low water threshold for buffer xmit_buf
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*
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* Revision 1.36.4.23 1996/12/02 21:50:16 bentson
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* Marcio provided fix to modem status fetch for -Z
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*
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* Revision 1.36.4.22 1996/10/28 22:41:17 bentson
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* improve mapping of -Z control page (thanks to Steve
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* Price <stevep@fa.tdktca.com> for help on this)
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*
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* Revision 1.36.4.21 1996/09/10 17:00:10 bentson
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* shift from CPU-bound to memcopy in cyz_polling operation
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*
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* Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
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* Added support to set and report higher speeds.
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*
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* Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
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* Some fixes in the HW flow control for the BETA release.
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* Don't try to register the IRQ.
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*
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* Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
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* make sure "cyc" appears in all kernel messages; all soft interrupts
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* handled by same routine; recognize out-of-band reception; comment
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* out some diagnostic messages; leave RTS/CTS flow control to hardware;
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* fix race condition in -Z buffer management; only -Y needs to explicitly
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* flush chars; tidy up some startup messages;
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*
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* Revision 1.36.4.18 1996/07/25 18:57:31 bentson
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* shift MOD_INC_USE_COUNT location to match
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* serial.c; purge some diagnostic messages;
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*
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* Revision 1.36.4.17 1996/07/25 18:01:08 bentson
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* enable modem status messages and fetch & process them; note
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* time of last activity type for each port; set_line_char now
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* supports more than line 0 and treats 0 baud correctly;
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* get_modem_info senses rs_status;
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*
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* Revision 1.36.4.16 1996/07/20 08:43:15 bentson
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* barely works--now's time to turn on
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* more features 'til it breaks
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*
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* Revision 1.36.4.15 1996/07/19 22:30:06 bentson
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* check more -Z board status; shorten boot message
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*
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* Revision 1.36.4.14 1996/07/19 22:20:37 bentson
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* fix reference to ch_ctrl in startup; verify return
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* values from cyz_issue_cmd and cyz_update_channel;
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* more stuff to get modem control correct;
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*
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* Revision 1.36.4.13 1996/07/11 19:53:33 bentson
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* more -Z stuff folded in; re-order changes to put -Z stuff
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* after -Y stuff (to make changes clearer)
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*
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* Revision 1.36.4.12 1996/07/11 15:40:55 bentson
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* Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
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* Add code to send break. Clear firmware ID word at startup (so
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* that other code won't talk to inactive board).
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*
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* Revision 1.36.4.11 1996/07/09 05:28:29 bentson
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* add code for -Z in set_line_char
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*
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* Revision 1.36.4.10 1996/07/08 19:28:37 bentson
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* fold more -Z stuff (or in some cases, error messages)
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* into driver; add text to "don't know what to do" messages.
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*
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* Revision 1.36.4.9 1996/07/08 18:38:38 bentson
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* moved compile-time flags near top of file; cosmetic changes
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* to narrow text (to allow 2-up printing); changed many declarations
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* to "static" to limit external symbols; shuffled code order to
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* coalesce -Y and -Z specific code, also to put internal functions
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* in order of tty_driver structure; added code to recognize -Z
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* ports (and for moment, do nothing or report error); add cy_startup
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* to parse boot command line for extra base addresses for ISA probes;
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*
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* Revision 1.36.4.8 1996/06/25 17:40:19 bentson
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* reorder some code, fix types of some vars (int vs. long),
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* add cy_setup to support user declared ISA addresses
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*
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* Revision 1.36.4.7 1996/06/21 23:06:18 bentson
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* dump ioctl based firmware load (it's now a user level
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* program); ensure uninitialzed ports cannot be used
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*
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* Revision 1.36.4.6 1996/06/20 23:17:19 bentson
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* rename vars and restructure some code
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*
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* Revision 1.36.4.5 1996/06/14 15:09:44 bentson
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* get right status back after boot load
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*
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* Revision 1.36.4.4 1996/06/13 19:51:44 bentson
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* successfully loads firmware
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*
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* Revision 1.36.4.3 1996/06/13 06:08:33 bentson
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* add more of the code for the boot/load ioctls
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*
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* Revision 1.36.4.2 1996/06/11 21:00:51 bentson
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* start to add Z functionality--starting with ioctl
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* for loading firmware
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*
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* Revision 1.36.4.1 1996/06/10 18:03:02 bentson
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* added code to recognize Z/PCI card at initialization; report
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* presence, but card is not initialized (because firmware needs
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* to be loaded)
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*
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* Revision 1.36.3.8 1996/06/07 16:29:00 bentson
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* starting minor number at zero; added missing verify_area
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* as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
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*
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* Revision 1.36.3.7 1996/04/19 21:06:18 bentson
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* remove unneeded boot message & fix CLOCAL hardware flow
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* control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
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* remove unused diagnostic statements; minor 0 is first;
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*
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* Revision 1.36.3.6 1996/03/13 13:21:17 marcio
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* The kernel function vremap (available only in later 1.3.xx kernels)
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* allows the access to memory addresses above the RAM. This revision
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* of the driver supports PCI boards below 1Mb (device id 0x100) and
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* above 1Mb (device id 0x101).
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*
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* Revision 1.36.3.5 1996/03/07 15:20:17 bentson
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* Some global changes to interrupt handling spilled into
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* this driver--mostly unused arguments in system function
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* calls. Also added change by Marcio Saito which should
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* reduce lost interrupts at startup by fast processors.
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*
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* Revision 1.36.3.4 1995/11/13 20:45:10 bentson
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* Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
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* in 1.3.41 kernel to remove a possible race condition, extend
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* some error messages, and let the driver run as a loadable module
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* Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
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* possible race condition.
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* Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
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*
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* Revision 1.36.3.3 1995/11/13 19:44:48 bentson
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* Changes by Linus Torvalds in 1.3.33 kernel distribution
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|
* required due to reordering of driver initialization.
|
|
* Drivers are now initialized *after* memory management.
|
|
*
|
|
* Revision 1.36.3.2 1995/09/08 22:07:14 bentson
|
|
* remove printk from ISR; fix typo
|
|
*
|
|
* Revision 1.36.3.1 1995/09/01 12:00:42 marcio
|
|
* Minor fixes in the PCI board support. PCI function calls in
|
|
* conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
|
|
* <duncan@okay.com>. "bad serial count" message removed.
|
|
*
|
|
* Revision 1.36.3 1995/08/22 09:19:42 marcio
|
|
* Cyclom-Y/PCI support added. Changes in the cy_init routine and
|
|
* board initialization. Changes in the boot messages. The driver
|
|
* supports up to 4 boards and 64 ports by default.
|
|
*
|
|
* Revision 1.36.1.4 1995/03/29 06:14:14 bentson
|
|
* disambiguate between Cyclom-16Y and Cyclom-32Ye;
|
|
*
|
|
* Revision 1.36.1.3 1995/03/23 22:15:35 bentson
|
|
* add missing break in modem control block in ioctl switch statement
|
|
* (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
|
|
*
|
|
* Revision 1.36.1.2 1995/03/22 19:16:22 bentson
|
|
* make sure CTS flow control is set as soon as possible (thanks
|
|
* to note from David Lambert <lambert@chesapeake.rps.slb.com>);
|
|
*
|
|
* Revision 1.36.1.1 1995/03/13 15:44:43 bentson
|
|
* initialize defaults for receive threshold and stale data timeout;
|
|
* cosmetic changes;
|
|
*
|
|
* Revision 1.36 1995/03/10 23:33:53 bentson
|
|
* added support of chips 4-7 in 32 port Cyclom-Ye;
|
|
* fix cy_interrupt pointer dereference problem
|
|
* (Joe Portman <baron@aa.net>);
|
|
* give better error response if open is attempted on non-existent port
|
|
* (Zachariah Vaum <jchryslr@netcom.com>);
|
|
* correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
|
|
* conditional compilation for -16Y on systems with fast, noisy bus;
|
|
* comment out diagnostic print function;
|
|
* cleaned up table of base addresses;
|
|
* set receiver time-out period register to correct value,
|
|
* set receive threshold to better default values,
|
|
* set chip timer to more accurate 200 Hz ticking,
|
|
* add code to monitor and modify receive parameters
|
|
* (Rik Faith <faith@cs.unc.edu> Nick Simicich
|
|
* <njs@scifi.emi.net>);
|
|
*
|
|
* Revision 1.35 1994/12/16 13:54:18 steffen
|
|
* additional patch by Marcio Saito for board detection
|
|
* Accidently left out in 1.34
|
|
*
|
|
* Revision 1.34 1994/12/10 12:37:12 steffen
|
|
* This is the corrected version as suggested by Marcio Saito
|
|
*
|
|
* Revision 1.33 1994/12/01 22:41:18 bentson
|
|
* add hooks to support more high speeds directly; add tytso
|
|
* patch regarding CLOCAL wakeups
|
|
*
|
|
* Revision 1.32 1994/11/23 19:50:04 bentson
|
|
* allow direct kernel control of higher signalling rates;
|
|
* look for cards at additional locations
|
|
*
|
|
* Revision 1.31 1994/11/16 04:33:28 bentson
|
|
* ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
|
|
* a problem in chars_in_buffer has been resolved by some
|
|
* small changes; this should yield smoother output
|
|
*
|
|
* Revision 1.30 1994/11/16 04:28:05 bentson
|
|
* Fix from Corey Minyard, Internet: minyard@metronet.com,
|
|
* UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
|
|
* cy_hangup that appears to clear up much (all?) of the
|
|
* DTR glitches; also he's added/cleaned-up diagnostic messages
|
|
*
|
|
* Revision 1.29 1994/11/16 04:16:07 bentson
|
|
* add change proposed by Ralph Sims, ralphs@halcyon.com, to
|
|
* operate higher speeds in same way as other serial ports;
|
|
* add more serial ports (for up to two 16-port muxes).
|
|
*
|
|
* Revision 1.28 1994/11/04 00:13:16 root
|
|
* turn off diagnostic messages
|
|
*
|
|
* Revision 1.27 1994/11/03 23:46:37 root
|
|
* bunch of changes to bring driver into greater conformance
|
|
* with the serial.c driver (looking for missed fixes)
|
|
*
|
|
* Revision 1.26 1994/11/03 22:40:36 root
|
|
* automatic interrupt probing fixed.
|
|
*
|
|
* Revision 1.25 1994/11/03 20:17:02 root
|
|
* start to implement auto-irq
|
|
*
|
|
* Revision 1.24 1994/11/03 18:01:55 root
|
|
* still working on modem signals--trying not to drop DTR
|
|
* during the getty/login processes
|
|
*
|
|
* Revision 1.23 1994/11/03 17:51:36 root
|
|
* extend baud rate support; set receive threshold as function
|
|
* of baud rate; fix some problems with RTS/CTS;
|
|
*
|
|
* Revision 1.22 1994/11/02 18:05:35 root
|
|
* changed arguments to udelay to type long to get
|
|
* delays to be of correct duration
|
|
*
|
|
* Revision 1.21 1994/11/02 17:37:30 root
|
|
* employ udelay (after calibrating loops_per_second earlier
|
|
* in init/main.c) instead of using home-grown delay routines
|
|
*
|
|
* Revision 1.20 1994/11/02 03:11:38 root
|
|
* cy_chars_in_buffer forces a return value of 0 to let
|
|
* login work (don't know why it does); some functions
|
|
* that were returning EFAULT, now executes the code;
|
|
* more work on deciding when to disable xmit interrupts;
|
|
*
|
|
* Revision 1.19 1994/11/01 20:10:14 root
|
|
* define routine to start transmission interrupts (by enabling
|
|
* transmit interrupts); directly enable/disable modem interrupts;
|
|
*
|
|
* Revision 1.18 1994/11/01 18:40:45 bentson
|
|
* Don't always enable transmit interrupts in startup; interrupt on
|
|
* TxMpty instead of TxRdy to help characters get out before shutdown;
|
|
* restructure xmit interrupt to check for chars first and quit if
|
|
* none are ready to go; modem status (MXVRx) is upright, _not_ inverted
|
|
* (to my view);
|
|
*
|
|
* Revision 1.17 1994/10/30 04:39:45 bentson
|
|
* rename serial_driver and callout_driver to cy_serial_driver and
|
|
* cy_callout_driver to avoid linkage interference; initialize
|
|
* info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
|
|
* from cyclades_port structure; add paranoia check to cy_close;
|
|
*
|
|
* Revision 1.16 1994/10/30 01:14:33 bentson
|
|
* change major numbers; add some _early_ return statements;
|
|
*
|
|
* Revision 1.15 1994/10/29 06:43:15 bentson
|
|
* final tidying up for clean compile; enable some error reporting
|
|
*
|
|
* Revision 1.14 1994/10/28 20:30:22 Bentson
|
|
* lots of changes to drag the driver towards the new tty_io
|
|
* structures and operation. not expected to work, but may
|
|
* compile cleanly.
|
|
*
|
|
* Revision 1.13 1994/07/21 23:08:57 Bentson
|
|
* add some diagnostic cruft; support 24 lines (for testing
|
|
* both -8Y and -16Y cards; be more thorough in servicing all
|
|
* chips during interrupt; add "volatile" a few places to
|
|
* circumvent compiler optimizations; fix base & offset
|
|
* computations in block_til_ready (was causing chip 0 to
|
|
* stop operation)
|
|
*
|
|
* Revision 1.12 1994/07/19 16:42:11 Bentson
|
|
* add some hackery for kernel version 1.1.8; expand
|
|
* error messages; refine timing for delay loops and
|
|
* declare loop params volatile
|
|
*
|
|
* Revision 1.11 1994/06/11 21:53:10 bentson
|
|
* get use of save_car right in transmit interrupt service
|
|
*
|
|
* Revision 1.10.1.1 1994/06/11 21:31:18 bentson
|
|
* add some diagnostic printing; try to fix save_car stuff
|
|
*
|
|
* Revision 1.10 1994/06/11 20:36:08 bentson
|
|
* clean up compiler warnings
|
|
*
|
|
* Revision 1.9 1994/06/11 19:42:46 bentson
|
|
* added a bunch of code to support modem signalling
|
|
*
|
|
* Revision 1.8 1994/06/11 17:57:07 bentson
|
|
* recognize break & parity error
|
|
*
|
|
* Revision 1.7 1994/06/05 05:51:34 bentson
|
|
* Reorder baud table to be monotonic; add cli to CP; discard
|
|
* incoming characters and status if the line isn't open; start to
|
|
* fold code into cy_throttle; start to port get_serial_info,
|
|
* set_serial_info, get_modem_info, set_modem_info, and send_break
|
|
* from serial.c; expand cy_ioctl; relocate and expand config_setup;
|
|
* get flow control characters from tty struct; invalidate ports w/o
|
|
* hardware;
|
|
*
|
|
* Revision 1.6 1994/05/31 18:42:21 bentson
|
|
* add a loop-breaker in the interrupt service routine;
|
|
* note when port is initialized so that it can be shut
|
|
* down under the right conditions; receive works without
|
|
* any obvious errors
|
|
*
|
|
* Revision 1.5 1994/05/30 00:55:02 bentson
|
|
* transmit works without obvious errors
|
|
*
|
|
* Revision 1.4 1994/05/27 18:46:27 bentson
|
|
* incorporated more code from lib_y.c; can now print short
|
|
* strings under interrupt control to port zero; seems to
|
|
* select ports/channels/lines correctly
|
|
*
|
|
* Revision 1.3 1994/05/25 22:12:44 bentson
|
|
* shifting from multi-port on a card to proper multiplexor
|
|
* data structures; added skeletons of most routines
|
|
*
|
|
* Revision 1.2 1994/05/19 13:21:43 bentson
|
|
* start to crib from other sources
|
|
*
|
|
*/
|
|
|
|
#define CY_VERSION "2.5"
|
|
|
|
/* If you need to install more boards than NR_CARDS, change the constant
|
|
in the definition below. No other change is necessary to support up to
|
|
eight boards. Beyond that you'll have to extend cy_isa_addresses. */
|
|
|
|
#define NR_CARDS 4
|
|
|
|
/*
|
|
If the total number of ports is larger than NR_PORTS, change this
|
|
constant in the definition below. No other change is necessary to
|
|
support more boards/ports. */
|
|
|
|
#define NR_PORTS 256
|
|
|
|
#define ZE_V1_NPORTS 64
|
|
#define ZO_V1 0
|
|
#define ZO_V2 1
|
|
#define ZE_V1 2
|
|
|
|
#define SERIAL_PARANOIA_CHECK
|
|
#undef CY_DEBUG_OPEN
|
|
#undef CY_DEBUG_THROTTLE
|
|
#undef CY_DEBUG_OTHER
|
|
#undef CY_DEBUG_IO
|
|
#undef CY_DEBUG_COUNT
|
|
#undef CY_DEBUG_DTR
|
|
#undef CY_DEBUG_WAIT_UNTIL_SENT
|
|
#undef CY_DEBUG_INTERRUPTS
|
|
#undef CY_16Y_HACK
|
|
#undef CY_ENABLE_MONITORING
|
|
#undef CY_PCI_DEBUG
|
|
|
|
/*
|
|
* Include section
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/tty_flip.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/major.h>
|
|
#include <linux/string.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/cyclades.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/firmware.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <linux/stat.h>
|
|
#include <linux/proc_fs.h>
|
|
|
|
static void cy_throttle(struct tty_struct *tty);
|
|
static void cy_send_xchar(struct tty_struct *tty, char ch);
|
|
|
|
#define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
|
|
|
|
#define Z_FPGA_CHECK(card) \
|
|
((readl(&((struct RUNTIME_9060 __iomem *) \
|
|
((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
|
|
|
|
#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
|
|
((card).ctl_addr))->mail_box_0)) || \
|
|
Z_FPGA_CHECK(card)) && \
|
|
(ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
|
|
((card).base_addr+ID_ADDRESS))->signature)))
|
|
|
|
#ifndef SERIAL_XMIT_SIZE
|
|
#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
|
|
#endif
|
|
#define WAKEUP_CHARS 256
|
|
|
|
#define STD_COM_FLAGS (0)
|
|
|
|
/* firmware stuff */
|
|
#define ZL_MAX_BLOCKS 16
|
|
#define DRIVER_VERSION 0x02010203
|
|
#define RAM_SIZE 0x80000
|
|
|
|
#define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
|
|
|
|
enum zblock_type {
|
|
ZBLOCK_PRG = 0,
|
|
ZBLOCK_FPGA = 1
|
|
};
|
|
|
|
struct zfile_header {
|
|
char name[64];
|
|
char date[32];
|
|
char aux[32];
|
|
u32 n_config;
|
|
u32 config_offset;
|
|
u32 n_blocks;
|
|
u32 block_offset;
|
|
u32 reserved[9];
|
|
} __attribute__ ((packed));
|
|
|
|
struct zfile_config {
|
|
char name[64];
|
|
u32 mailbox;
|
|
u32 function;
|
|
u32 n_blocks;
|
|
u32 block_list[ZL_MAX_BLOCKS];
|
|
} __attribute__ ((packed));
|
|
|
|
struct zfile_block {
|
|
u32 type;
|
|
u32 file_offset;
|
|
u32 ram_offset;
|
|
u32 size;
|
|
} __attribute__ ((packed));
|
|
|
|
static struct tty_driver *cy_serial_driver;
|
|
|
|
#ifdef CONFIG_ISA
|
|
/* This is the address lookup table. The driver will probe for
|
|
Cyclom-Y/ISA boards at all addresses in here. If you want the
|
|
driver to probe addresses at a different address, add it to
|
|
this table. If the driver is probing some other board and
|
|
causing problems, remove the offending address from this table.
|
|
*/
|
|
|
|
static unsigned int cy_isa_addresses[] = {
|
|
0xD0000,
|
|
0xD2000,
|
|
0xD4000,
|
|
0xD6000,
|
|
0xD8000,
|
|
0xDA000,
|
|
0xDC000,
|
|
0xDE000,
|
|
0, 0, 0, 0, 0, 0, 0, 0
|
|
};
|
|
|
|
#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
|
|
|
|
#ifdef MODULE
|
|
static long maddr[NR_CARDS];
|
|
static int irq[NR_CARDS];
|
|
|
|
module_param_array(maddr, long, NULL, 0);
|
|
module_param_array(irq, int, NULL, 0);
|
|
#endif
|
|
|
|
#endif /* CONFIG_ISA */
|
|
|
|
/* This is the per-card data structure containing address, irq, number of
|
|
channels, etc. This driver supports a maximum of NR_CARDS cards.
|
|
*/
|
|
static struct cyclades_card cy_card[NR_CARDS];
|
|
|
|
static int cy_next_channel; /* next minor available */
|
|
|
|
/*
|
|
* This is used to look up the divisor speeds and the timeouts
|
|
* We're normally limited to 15 distinct baud rates. The extra
|
|
* are accessed via settings in info->flags.
|
|
* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
|
* 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
|
|
* HI VHI
|
|
* 20
|
|
*/
|
|
static int baud_table[] = {
|
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
|
|
1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
|
|
230400, 0
|
|
};
|
|
|
|
static char baud_co_25[] = { /* 25 MHz clock option table */
|
|
/* value => 00 01 02 03 04 */
|
|
/* divide by 8 32 128 512 2048 */
|
|
0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
|
|
0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
};
|
|
|
|
static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
|
|
0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
|
|
0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
|
|
};
|
|
|
|
static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
|
|
/* value => 00 01 02 03 04 */
|
|
/* divide by 8 32 128 512 2048 */
|
|
0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
|
|
0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00
|
|
};
|
|
|
|
static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
|
|
0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
|
|
0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
|
|
0x21
|
|
};
|
|
|
|
static char baud_cor3[] = { /* receive threshold */
|
|
0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
|
|
0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
|
|
0x07
|
|
};
|
|
|
|
/*
|
|
* The Cyclades driver implements HW flow control as any serial driver.
|
|
* The cyclades_port structure member rflow and the vector rflow_thr
|
|
* allows us to take advantage of a special feature in the CD1400 to avoid
|
|
* data loss even when the system interrupt latency is too high. These flags
|
|
* are to be used only with very special applications. Setting these flags
|
|
* requires the use of a special cable (DTR and RTS reversed). In the new
|
|
* CD1400-based boards (rev. 6.00 or later), there is no need for special
|
|
* cables.
|
|
*/
|
|
|
|
static char rflow_thr[] = { /* rflow threshold */
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
|
|
0x0a
|
|
};
|
|
|
|
/* The Cyclom-Ye has placed the sequential chips in non-sequential
|
|
* address order. This look-up table overcomes that problem.
|
|
*/
|
|
static int cy_chip_offset[] = { 0x0000,
|
|
0x0400,
|
|
0x0800,
|
|
0x0C00,
|
|
0x0200,
|
|
0x0600,
|
|
0x0A00,
|
|
0x0E00
|
|
};
|
|
|
|
/* PCI related definitions */
|
|
|
|
#ifdef CONFIG_PCI
|
|
static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
|
|
{ } /* end of table */
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
|
|
#endif
|
|
|
|
static void cy_start(struct tty_struct *);
|
|
static void set_line_char(struct cyclades_port *);
|
|
static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
|
|
#ifdef CONFIG_ISA
|
|
static unsigned detect_isa_irq(void __iomem *);
|
|
#endif /* CONFIG_ISA */
|
|
|
|
static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
static void cyz_poll(unsigned long);
|
|
|
|
/* The Cyclades-Z polling cycle is defined by this variable */
|
|
static long cyz_polling_cycle = CZ_DEF_POLL;
|
|
|
|
static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
|
|
|
|
#else /* CONFIG_CYZ_INTR */
|
|
static void cyz_rx_restart(unsigned long);
|
|
static struct timer_list cyz_rx_full_timer[NR_PORTS];
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
static inline int serial_paranoia_check(struct cyclades_port *info,
|
|
char *name, const char *routine)
|
|
{
|
|
#ifdef SERIAL_PARANOIA_CHECK
|
|
if (!info) {
|
|
printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
|
|
"in %s\n", name, routine);
|
|
return 1;
|
|
}
|
|
|
|
if (info->magic != CYCLADES_MAGIC) {
|
|
printk(KERN_WARNING "cyc Warning: bad magic number for serial "
|
|
"struct (%s) in %s\n", name, routine);
|
|
return 1;
|
|
}
|
|
#endif
|
|
return 0;
|
|
} /* serial_paranoia_check */
|
|
|
|
/***********************************************************/
|
|
/********* Start of block of Cyclom-Y specific code ********/
|
|
|
|
/* This routine waits up to 1000 micro-seconds for the previous
|
|
command to the Cirrus chip to complete and then issues the
|
|
new command. An error is returned if the previous command
|
|
didn't finish within the time limit.
|
|
|
|
This function is only called from inside spinlock-protected code.
|
|
*/
|
|
static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* Check to see that the previous command has completed */
|
|
for (i = 0; i < 100; i++) {
|
|
if (readb(base_addr + (CyCCR << index)) == 0) {
|
|
break;
|
|
}
|
|
udelay(10L);
|
|
}
|
|
/* if the CCR never cleared, the previous command
|
|
didn't finish within the "reasonable time" */
|
|
if (i == 100)
|
|
return -1;
|
|
|
|
/* Issue the new command */
|
|
cy_writeb(base_addr + (CyCCR << index), cmd);
|
|
|
|
return 0;
|
|
} /* cyy_issue_cmd */
|
|
|
|
#ifdef CONFIG_ISA
|
|
/* ISA interrupt detection code */
|
|
static unsigned detect_isa_irq(void __iomem * address)
|
|
{
|
|
int irq;
|
|
unsigned long irqs, flags;
|
|
int save_xir, save_car;
|
|
int index = 0; /* IRQ probing is only for ISA */
|
|
|
|
/* forget possible initially masked and pending IRQ */
|
|
irq = probe_irq_off(probe_irq_on());
|
|
|
|
/* Clear interrupts on the board first */
|
|
cy_writeb(address + (Cy_ClrIntr << index), 0);
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
|
|
irqs = probe_irq_on();
|
|
/* Wait ... */
|
|
udelay(5000L);
|
|
|
|
/* Enable the Tx interrupts on the CD1400 */
|
|
local_irq_save(flags);
|
|
cy_writeb(address + (CyCAR << index), 0);
|
|
cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
|
|
|
|
cy_writeb(address + (CyCAR << index), 0);
|
|
cy_writeb(address + (CySRER << index),
|
|
readb(address + (CySRER << index)) | CyTxRdy);
|
|
local_irq_restore(flags);
|
|
|
|
/* Wait ... */
|
|
udelay(5000L);
|
|
|
|
/* Check which interrupt is in use */
|
|
irq = probe_irq_off(irqs);
|
|
|
|
/* Clean up */
|
|
save_xir = (u_char) readb(address + (CyTIR << index));
|
|
save_car = readb(address + (CyCAR << index));
|
|
cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
|
|
cy_writeb(address + (CySRER << index),
|
|
readb(address + (CySRER << index)) & ~CyTxRdy);
|
|
cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
|
|
cy_writeb(address + (CyCAR << index), (save_car));
|
|
cy_writeb(address + (Cy_ClrIntr << index), 0);
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
|
|
return (irq > 0) ? irq : 0;
|
|
}
|
|
#endif /* CONFIG_ISA */
|
|
|
|
static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
|
|
void __iomem *base_addr)
|
|
{
|
|
struct cyclades_port *info;
|
|
struct tty_struct *tty;
|
|
int len, index = cinfo->bus_index;
|
|
u8 save_xir, channel, save_car, data, char_count;
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
|
|
#endif
|
|
/* determine the channel & change to that context */
|
|
save_xir = readb(base_addr + (CyRIR << index));
|
|
channel = save_xir & CyIRChannel;
|
|
info = &cinfo->ports[channel + chip * 4];
|
|
save_car = readb(base_addr + (CyCAR << index));
|
|
cy_writeb(base_addr + (CyCAR << index), save_xir);
|
|
|
|
/* if there is nowhere to put the data, discard it */
|
|
if (info->tty == NULL) {
|
|
if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
|
|
CyIVRRxEx) { /* exception */
|
|
data = readb(base_addr + (CyRDSR << index));
|
|
} else { /* normal character reception */
|
|
char_count = readb(base_addr + (CyRDCR << index));
|
|
while (char_count--)
|
|
data = readb(base_addr + (CyRDSR << index));
|
|
}
|
|
goto end;
|
|
}
|
|
/* there is an open port for this data */
|
|
tty = info->tty;
|
|
if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
|
|
CyIVRRxEx) { /* exception */
|
|
data = readb(base_addr + (CyRDSR << index));
|
|
|
|
/* For statistics only */
|
|
if (data & CyBREAK)
|
|
info->icount.brk++;
|
|
else if (data & CyFRAME)
|
|
info->icount.frame++;
|
|
else if (data & CyPARITY)
|
|
info->icount.parity++;
|
|
else if (data & CyOVERRUN)
|
|
info->icount.overrun++;
|
|
|
|
if (data & info->ignore_status_mask) {
|
|
info->icount.rx++;
|
|
return;
|
|
}
|
|
if (tty_buffer_request_room(tty, 1)) {
|
|
if (data & info->read_status_mask) {
|
|
if (data & CyBREAK) {
|
|
tty_insert_flip_char(tty,
|
|
readb(base_addr + (CyRDSR <<
|
|
index)), TTY_BREAK);
|
|
info->icount.rx++;
|
|
if (info->flags & ASYNC_SAK)
|
|
do_SAK(tty);
|
|
} else if (data & CyFRAME) {
|
|
tty_insert_flip_char( tty,
|
|
readb(base_addr + (CyRDSR <<
|
|
index)), TTY_FRAME);
|
|
info->icount.rx++;
|
|
info->idle_stats.frame_errs++;
|
|
} else if (data & CyPARITY) {
|
|
/* Pieces of seven... */
|
|
tty_insert_flip_char(tty,
|
|
readb(base_addr + (CyRDSR <<
|
|
index)), TTY_PARITY);
|
|
info->icount.rx++;
|
|
info->idle_stats.parity_errs++;
|
|
} else if (data & CyOVERRUN) {
|
|
tty_insert_flip_char(tty, 0,
|
|
TTY_OVERRUN);
|
|
info->icount.rx++;
|
|
/* If the flip buffer itself is
|
|
overflowing, we still lose
|
|
the next incoming character.
|
|
*/
|
|
tty_insert_flip_char(tty,
|
|
readb(base_addr + (CyRDSR <<
|
|
index)), TTY_FRAME);
|
|
info->icount.rx++;
|
|
info->idle_stats.overruns++;
|
|
/* These two conditions may imply */
|
|
/* a normal read should be done. */
|
|
/* } else if(data & CyTIMEOUT) { */
|
|
/* } else if(data & CySPECHAR) { */
|
|
} else {
|
|
tty_insert_flip_char(tty, 0,
|
|
TTY_NORMAL);
|
|
info->icount.rx++;
|
|
}
|
|
} else {
|
|
tty_insert_flip_char(tty, 0, TTY_NORMAL);
|
|
info->icount.rx++;
|
|
}
|
|
} else {
|
|
/* there was a software buffer overrun and nothing
|
|
* could be done about it!!! */
|
|
info->icount.buf_overrun++;
|
|
info->idle_stats.overruns++;
|
|
}
|
|
} else { /* normal character reception */
|
|
/* load # chars available from the chip */
|
|
char_count = readb(base_addr + (CyRDCR << index));
|
|
|
|
#ifdef CY_ENABLE_MONITORING
|
|
++info->mon.int_count;
|
|
info->mon.char_count += char_count;
|
|
if (char_count > info->mon.char_max)
|
|
info->mon.char_max = char_count;
|
|
info->mon.char_last = char_count;
|
|
#endif
|
|
len = tty_buffer_request_room(tty, char_count);
|
|
while (len--) {
|
|
data = readb(base_addr + (CyRDSR << index));
|
|
tty_insert_flip_char(tty, data, TTY_NORMAL);
|
|
info->idle_stats.recv_bytes++;
|
|
info->icount.rx++;
|
|
#ifdef CY_16Y_HACK
|
|
udelay(10L);
|
|
#endif
|
|
}
|
|
info->idle_stats.recv_idle = jiffies;
|
|
}
|
|
tty_schedule_flip(tty);
|
|
end:
|
|
/* end of service */
|
|
cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
|
|
cy_writeb(base_addr + (CyCAR << index), save_car);
|
|
}
|
|
|
|
static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
|
|
void __iomem *base_addr)
|
|
{
|
|
struct cyclades_port *info;
|
|
int char_count, index = cinfo->bus_index;
|
|
u8 save_xir, channel, save_car, outch;
|
|
|
|
/* Since we only get here when the transmit buffer
|
|
is empty, we know we can always stuff a dozen
|
|
characters. */
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
|
|
#endif
|
|
|
|
/* determine the channel & change to that context */
|
|
save_xir = readb(base_addr + (CyTIR << index));
|
|
channel = save_xir & CyIRChannel;
|
|
save_car = readb(base_addr + (CyCAR << index));
|
|
cy_writeb(base_addr + (CyCAR << index), save_xir);
|
|
|
|
/* validate the port# (as configured and open) */
|
|
if (channel + chip * 4 >= cinfo->nports) {
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) & ~CyTxRdy);
|
|
goto end;
|
|
}
|
|
info = &cinfo->ports[channel + chip * 4];
|
|
if (info->tty == NULL) {
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) & ~CyTxRdy);
|
|
goto end;
|
|
}
|
|
|
|
/* load the on-chip space for outbound data */
|
|
char_count = info->xmit_fifo_size;
|
|
|
|
if (info->x_char) { /* send special char */
|
|
outch = info->x_char;
|
|
cy_writeb(base_addr + (CyTDR << index), outch);
|
|
char_count--;
|
|
info->icount.tx++;
|
|
info->x_char = 0;
|
|
}
|
|
|
|
if (info->breakon || info->breakoff) {
|
|
if (info->breakon) {
|
|
cy_writeb(base_addr + (CyTDR << index), 0);
|
|
cy_writeb(base_addr + (CyTDR << index), 0x81);
|
|
info->breakon = 0;
|
|
char_count -= 2;
|
|
}
|
|
if (info->breakoff) {
|
|
cy_writeb(base_addr + (CyTDR << index), 0);
|
|
cy_writeb(base_addr + (CyTDR << index), 0x83);
|
|
info->breakoff = 0;
|
|
char_count -= 2;
|
|
}
|
|
}
|
|
|
|
while (char_count-- > 0) {
|
|
if (!info->xmit_cnt) {
|
|
if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) &
|
|
~CyTxMpty);
|
|
} else {
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
(readb(base_addr + (CySRER << index)) &
|
|
~CyTxRdy) | CyTxMpty);
|
|
}
|
|
goto done;
|
|
}
|
|
if (info->xmit_buf == NULL) {
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) &
|
|
~CyTxRdy);
|
|
goto done;
|
|
}
|
|
if (info->tty->stopped || info->tty->hw_stopped) {
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) &
|
|
~CyTxRdy);
|
|
goto done;
|
|
}
|
|
/* Because the Embedded Transmit Commands have been enabled,
|
|
* we must check to see if the escape character, NULL, is being
|
|
* sent. If it is, we must ensure that there is room for it to
|
|
* be doubled in the output stream. Therefore we no longer
|
|
* advance the pointer when the character is fetched, but
|
|
* rather wait until after the check for a NULL output
|
|
* character. This is necessary because there may not be room
|
|
* for the two chars needed to send a NULL.)
|
|
*/
|
|
outch = info->xmit_buf[info->xmit_tail];
|
|
if (outch) {
|
|
info->xmit_cnt--;
|
|
info->xmit_tail = (info->xmit_tail + 1) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
cy_writeb(base_addr + (CyTDR << index), outch);
|
|
info->icount.tx++;
|
|
} else {
|
|
if (char_count > 1) {
|
|
info->xmit_cnt--;
|
|
info->xmit_tail = (info->xmit_tail + 1) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
cy_writeb(base_addr + (CyTDR << index), outch);
|
|
cy_writeb(base_addr + (CyTDR << index), 0);
|
|
info->icount.tx++;
|
|
char_count--;
|
|
}
|
|
}
|
|
}
|
|
|
|
done:
|
|
tty_wakeup(info->tty);
|
|
end:
|
|
/* end of service */
|
|
cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
|
|
cy_writeb(base_addr + (CyCAR << index), save_car);
|
|
}
|
|
|
|
static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
|
|
void __iomem *base_addr)
|
|
{
|
|
struct cyclades_port *info;
|
|
int index = cinfo->bus_index;
|
|
u8 save_xir, channel, save_car, mdm_change, mdm_status;
|
|
|
|
/* determine the channel & change to that context */
|
|
save_xir = readb(base_addr + (CyMIR << index));
|
|
channel = save_xir & CyIRChannel;
|
|
info = &cinfo->ports[channel + chip * 4];
|
|
save_car = readb(base_addr + (CyCAR << index));
|
|
cy_writeb(base_addr + (CyCAR << index), save_xir);
|
|
|
|
mdm_change = readb(base_addr + (CyMISR << index));
|
|
mdm_status = readb(base_addr + (CyMSVR1 << index));
|
|
|
|
if (!info->tty)
|
|
goto end;
|
|
|
|
if (mdm_change & CyANY_DELTA) {
|
|
/* For statistics only */
|
|
if (mdm_change & CyDCD)
|
|
info->icount.dcd++;
|
|
if (mdm_change & CyCTS)
|
|
info->icount.cts++;
|
|
if (mdm_change & CyDSR)
|
|
info->icount.dsr++;
|
|
if (mdm_change & CyRI)
|
|
info->icount.rng++;
|
|
|
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
}
|
|
|
|
if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
|
|
if (!(mdm_status & CyDCD)) {
|
|
tty_hangup(info->tty);
|
|
info->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
}
|
|
wake_up_interruptible(&info->open_wait);
|
|
}
|
|
if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
|
|
if (info->tty->hw_stopped) {
|
|
if (mdm_status & CyCTS) {
|
|
/* cy_start isn't used
|
|
because... !!! */
|
|
info->tty->hw_stopped = 0;
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) |
|
|
CyTxRdy);
|
|
tty_wakeup(info->tty);
|
|
}
|
|
} else {
|
|
if (!(mdm_status & CyCTS)) {
|
|
/* cy_stop isn't used
|
|
because ... !!! */
|
|
info->tty->hw_stopped = 1;
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) &
|
|
~CyTxRdy);
|
|
}
|
|
}
|
|
}
|
|
/* if (mdm_change & CyDSR) {
|
|
}
|
|
if (mdm_change & CyRI) {
|
|
}*/
|
|
end:
|
|
/* end of service */
|
|
cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
|
|
cy_writeb(base_addr + (CyCAR << index), save_car);
|
|
}
|
|
|
|
/* The real interrupt service routine is called
|
|
whenever the card wants its hand held--chars
|
|
received, out buffer empty, modem change, etc.
|
|
*/
|
|
static irqreturn_t cyy_interrupt(int irq, void *dev_id)
|
|
{
|
|
int status;
|
|
struct cyclades_card *cinfo = dev_id;
|
|
void __iomem *base_addr, *card_base_addr;
|
|
unsigned int chip, too_many, had_work;
|
|
int index;
|
|
|
|
if (unlikely(cinfo == NULL)) {
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
|
|
#endif
|
|
return IRQ_NONE; /* spurious interrupt */
|
|
}
|
|
|
|
card_base_addr = cinfo->base_addr;
|
|
index = cinfo->bus_index;
|
|
|
|
/* card was not initialized yet (e.g. DEBUG_SHIRQ) */
|
|
if (unlikely(card_base_addr == NULL))
|
|
return IRQ_HANDLED;
|
|
|
|
/* This loop checks all chips in the card. Make a note whenever
|
|
_any_ chip had some work to do, as this is considered an
|
|
indication that there will be more to do. Only when no chip
|
|
has any work does this outermost loop exit.
|
|
*/
|
|
do {
|
|
had_work = 0;
|
|
for (chip = 0; chip < cinfo->num_chips; chip++) {
|
|
base_addr = cinfo->base_addr +
|
|
(cy_chip_offset[chip] << index);
|
|
too_many = 0;
|
|
while ((status = readb(base_addr +
|
|
(CySVRR << index))) != 0x00) {
|
|
had_work++;
|
|
/* The purpose of the following test is to ensure that
|
|
no chip can monopolize the driver. This forces the
|
|
chips to be checked in a round-robin fashion (after
|
|
draining each of a bunch (1000) of characters).
|
|
*/
|
|
if (1000 < too_many++)
|
|
break;
|
|
spin_lock(&cinfo->card_lock);
|
|
if (status & CySRReceive) /* rx intr */
|
|
cyy_chip_rx(cinfo, chip, base_addr);
|
|
if (status & CySRTransmit) /* tx intr */
|
|
cyy_chip_tx(cinfo, chip, base_addr);
|
|
if (status & CySRModem) /* modem intr */
|
|
cyy_chip_modem(cinfo, chip, base_addr);
|
|
spin_unlock(&cinfo->card_lock);
|
|
}
|
|
}
|
|
} while (had_work);
|
|
|
|
/* clear interrupts */
|
|
spin_lock(&cinfo->card_lock);
|
|
cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
spin_unlock(&cinfo->card_lock);
|
|
return IRQ_HANDLED;
|
|
} /* cyy_interrupt */
|
|
|
|
/***********************************************************/
|
|
/********* End of block of Cyclom-Y specific code **********/
|
|
/******** Start of block of Cyclades-Z specific code *********/
|
|
/***********************************************************/
|
|
|
|
static int
|
|
cyz_fetch_msg(struct cyclades_card *cinfo,
|
|
__u32 * channel, __u8 * cmd, __u32 * param)
|
|
{
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
unsigned long loc_doorbell;
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
if (!ISZLOADED(*cinfo)) {
|
|
return -1;
|
|
}
|
|
zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
|
|
(cinfo->ctl_addr))->loc_doorbell);
|
|
if (loc_doorbell) {
|
|
*cmd = (char)(0xff & loc_doorbell);
|
|
*channel = readl(&board_ctrl->fwcmd_channel);
|
|
*param = (__u32) readl(&board_ctrl->fwcmd_param);
|
|
cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
|
|
loc_doorbell, 0xffffffff);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
} /* cyz_fetch_msg */
|
|
|
|
static int
|
|
cyz_issue_cmd(struct cyclades_card *cinfo,
|
|
__u32 channel, __u8 cmd, __u32 param)
|
|
{
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
__u32 __iomem *pci_doorbell;
|
|
unsigned int index;
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
if (!ISZLOADED(*cinfo)) {
|
|
return -1;
|
|
}
|
|
zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
index = 0;
|
|
pci_doorbell =
|
|
&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
|
|
while ((readl(pci_doorbell) & 0xff) != 0) {
|
|
if (index++ == 1000) {
|
|
return (int)(readl(pci_doorbell) & 0xff);
|
|
}
|
|
udelay(50L);
|
|
}
|
|
cy_writel(&board_ctrl->hcmd_channel, channel);
|
|
cy_writel(&board_ctrl->hcmd_param, param);
|
|
cy_writel(pci_doorbell, (long)cmd);
|
|
|
|
return 0;
|
|
} /* cyz_issue_cmd */
|
|
|
|
static void cyz_handle_rx(struct cyclades_port *info,
|
|
struct BUF_CTRL __iomem *buf_ctrl)
|
|
{
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct tty_struct *tty = info->tty;
|
|
unsigned int char_count;
|
|
int len;
|
|
#ifdef BLOCKMOVE
|
|
unsigned char *buf;
|
|
#else
|
|
char data;
|
|
#endif
|
|
__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
|
|
|
|
rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
|
|
rx_put = readl(&buf_ctrl->rx_put);
|
|
rx_bufsize = readl(&buf_ctrl->rx_bufsize);
|
|
rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
|
|
if (rx_put >= rx_get)
|
|
char_count = rx_put - rx_get;
|
|
else
|
|
char_count = rx_put - rx_get + rx_bufsize;
|
|
|
|
if (char_count) {
|
|
#ifdef CY_ENABLE_MONITORING
|
|
info->mon.int_count++;
|
|
info->mon.char_count += char_count;
|
|
if (char_count > info->mon.char_max)
|
|
info->mon.char_max = char_count;
|
|
info->mon.char_last = char_count;
|
|
#endif
|
|
if (tty == NULL) {
|
|
/* flush received characters */
|
|
new_rx_get = (new_rx_get + char_count) &
|
|
(rx_bufsize - 1);
|
|
info->rflush_count++;
|
|
} else {
|
|
#ifdef BLOCKMOVE
|
|
/* we'd like to use memcpy(t, f, n) and memset(s, c, count)
|
|
for performance, but because of buffer boundaries, there
|
|
may be several steps to the operation */
|
|
while (1) {
|
|
len = tty_prepare_flip_string(tty, &buf,
|
|
char_count);
|
|
if (!len)
|
|
break;
|
|
|
|
len = min_t(unsigned int, min(len, char_count),
|
|
rx_bufsize - new_rx_get);
|
|
|
|
memcpy_fromio(buf, cinfo->base_addr +
|
|
rx_bufaddr + new_rx_get, len);
|
|
|
|
new_rx_get = (new_rx_get + len) &
|
|
(rx_bufsize - 1);
|
|
char_count -= len;
|
|
info->icount.rx += len;
|
|
info->idle_stats.recv_bytes += len;
|
|
}
|
|
#else
|
|
len = tty_buffer_request_room(tty, char_count);
|
|
while (len--) {
|
|
data = readb(cinfo->base_addr + rx_bufaddr +
|
|
new_rx_get);
|
|
new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
|
|
tty_insert_flip_char(tty, data, TTY_NORMAL);
|
|
info->idle_stats.recv_bytes++;
|
|
info->icount.rx++;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_CYZ_INTR
|
|
/* Recalculate the number of chars in the RX buffer and issue
|
|
a cmd in case it's higher than the RX high water mark */
|
|
rx_put = readl(&buf_ctrl->rx_put);
|
|
if (rx_put >= rx_get)
|
|
char_count = rx_put - rx_get;
|
|
else
|
|
char_count = rx_put - rx_get + rx_bufsize;
|
|
if (char_count >= readl(&buf_ctrl->rx_threshold) &&
|
|
!timer_pending(&cyz_rx_full_timer[
|
|
info->line]))
|
|
mod_timer(&cyz_rx_full_timer[info->line],
|
|
jiffies + 1);
|
|
#endif
|
|
info->idle_stats.recv_idle = jiffies;
|
|
tty_schedule_flip(tty);
|
|
}
|
|
/* Update rx_get */
|
|
cy_writel(&buf_ctrl->rx_get, new_rx_get);
|
|
}
|
|
}
|
|
|
|
static void cyz_handle_tx(struct cyclades_port *info,
|
|
struct BUF_CTRL __iomem *buf_ctrl)
|
|
{
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct tty_struct *tty = info->tty;
|
|
u8 data;
|
|
unsigned int char_count;
|
|
#ifdef BLOCKMOVE
|
|
int small_count;
|
|
#endif
|
|
__u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
|
|
|
|
if (info->xmit_cnt <= 0) /* Nothing to transmit */
|
|
return;
|
|
|
|
tx_get = readl(&buf_ctrl->tx_get);
|
|
tx_put = readl(&buf_ctrl->tx_put);
|
|
tx_bufsize = readl(&buf_ctrl->tx_bufsize);
|
|
tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
|
|
if (tx_put >= tx_get)
|
|
char_count = tx_get - tx_put - 1 + tx_bufsize;
|
|
else
|
|
char_count = tx_get - tx_put - 1;
|
|
|
|
if (char_count) {
|
|
|
|
if (tty == NULL)
|
|
goto ztxdone;
|
|
|
|
if (info->x_char) { /* send special char */
|
|
data = info->x_char;
|
|
|
|
cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
|
|
tx_put = (tx_put + 1) & (tx_bufsize - 1);
|
|
info->x_char = 0;
|
|
char_count--;
|
|
info->icount.tx++;
|
|
}
|
|
#ifdef BLOCKMOVE
|
|
while (0 < (small_count = min_t(unsigned int,
|
|
tx_bufsize - tx_put, min_t(unsigned int,
|
|
(SERIAL_XMIT_SIZE - info->xmit_tail),
|
|
min_t(unsigned int, info->xmit_cnt,
|
|
char_count))))) {
|
|
|
|
memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
|
|
tx_put),
|
|
&info->xmit_buf[info->xmit_tail],
|
|
small_count);
|
|
|
|
tx_put = (tx_put + small_count) & (tx_bufsize - 1);
|
|
char_count -= small_count;
|
|
info->icount.tx += small_count;
|
|
info->xmit_cnt -= small_count;
|
|
info->xmit_tail = (info->xmit_tail + small_count) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
}
|
|
#else
|
|
while (info->xmit_cnt && char_count) {
|
|
data = info->xmit_buf[info->xmit_tail];
|
|
info->xmit_cnt--;
|
|
info->xmit_tail = (info->xmit_tail + 1) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
|
|
cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
|
|
tx_put = (tx_put + 1) & (tx_bufsize - 1);
|
|
char_count--;
|
|
info->icount.tx++;
|
|
}
|
|
#endif
|
|
tty_wakeup(tty);
|
|
ztxdone:
|
|
/* Update tx_put */
|
|
cy_writel(&buf_ctrl->tx_put, tx_put);
|
|
}
|
|
}
|
|
|
|
static void cyz_handle_cmd(struct cyclades_card *cinfo)
|
|
{
|
|
struct tty_struct *tty;
|
|
struct cyclades_port *info;
|
|
static struct FIRM_ID __iomem *firm_id;
|
|
static struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
static struct BOARD_CTRL __iomem *board_ctrl;
|
|
static struct CH_CTRL __iomem *ch_ctrl;
|
|
static struct BUF_CTRL __iomem *buf_ctrl;
|
|
__u32 channel;
|
|
__u8 cmd;
|
|
__u32 param;
|
|
__u32 hw_ver, fw_ver;
|
|
int special_count;
|
|
int delta_count;
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
fw_ver = readl(&board_ctrl->fw_version);
|
|
hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
|
|
mail_box_0);
|
|
|
|
while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
|
|
special_count = 0;
|
|
delta_count = 0;
|
|
info = &cinfo->ports[channel];
|
|
if ((tty = info->tty) == NULL)
|
|
continue;
|
|
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
|
|
buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
|
|
|
|
switch (cmd) {
|
|
case C_CM_PR_ERROR:
|
|
tty_insert_flip_char(tty, 0, TTY_PARITY);
|
|
info->icount.rx++;
|
|
special_count++;
|
|
break;
|
|
case C_CM_FR_ERROR:
|
|
tty_insert_flip_char(tty, 0, TTY_FRAME);
|
|
info->icount.rx++;
|
|
special_count++;
|
|
break;
|
|
case C_CM_RXBRK:
|
|
tty_insert_flip_char(tty, 0, TTY_BREAK);
|
|
info->icount.rx++;
|
|
special_count++;
|
|
break;
|
|
case C_CM_MDCD:
|
|
info->icount.dcd++;
|
|
delta_count++;
|
|
if (info->flags & ASYNC_CHECK_CD) {
|
|
if ((fw_ver > 241 ? ((u_long) param) :
|
|
readl(&ch_ctrl->rs_status)) &
|
|
C_RS_DCD) {
|
|
wake_up_interruptible(&info->open_wait);
|
|
} else {
|
|
tty_hangup(info->tty);
|
|
wake_up_interruptible(&info->open_wait);
|
|
info->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
}
|
|
}
|
|
break;
|
|
case C_CM_MCTS:
|
|
info->icount.cts++;
|
|
delta_count++;
|
|
break;
|
|
case C_CM_MRI:
|
|
info->icount.rng++;
|
|
delta_count++;
|
|
break;
|
|
case C_CM_MDSR:
|
|
info->icount.dsr++;
|
|
delta_count++;
|
|
break;
|
|
#ifdef Z_WAKE
|
|
case C_CM_IOCTLW:
|
|
complete(&info->shutdown_wait);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_CYZ_INTR
|
|
case C_CM_RXHIWM:
|
|
case C_CM_RXNNDT:
|
|
case C_CM_INTBACK2:
|
|
/* Reception Interrupt */
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
|
|
"port %ld\n", info->card, channel);
|
|
#endif
|
|
cyz_handle_rx(info, buf_ctrl);
|
|
break;
|
|
case C_CM_TXBEMPTY:
|
|
case C_CM_TXLOWWM:
|
|
case C_CM_INTBACK:
|
|
/* Transmission Interrupt */
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
|
|
"port %ld\n", info->card, channel);
|
|
#endif
|
|
cyz_handle_tx(info, buf_ctrl);
|
|
break;
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
case C_CM_FATAL:
|
|
/* should do something with this !!! */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (delta_count)
|
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
if (special_count)
|
|
tty_schedule_flip(tty);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
static irqreturn_t cyz_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct cyclades_card *cinfo = dev_id;
|
|
|
|
if (unlikely(cinfo == NULL)) {
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
|
|
#endif
|
|
return IRQ_NONE; /* spurious interrupt */
|
|
}
|
|
|
|
if (unlikely(!ISZLOADED(*cinfo))) {
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
|
|
"(IRQ%d).\n", irq);
|
|
#endif
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/* Handle the interrupts */
|
|
cyz_handle_cmd(cinfo);
|
|
|
|
return IRQ_HANDLED;
|
|
} /* cyz_interrupt */
|
|
|
|
static void cyz_rx_restart(unsigned long arg)
|
|
{
|
|
struct cyclades_port *info = (struct cyclades_port *)arg;
|
|
struct cyclades_card *card = info->card;
|
|
int retval;
|
|
__u32 channel = info->line - card->first_line;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
|
|
info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
|
|
#else /* CONFIG_CYZ_INTR */
|
|
|
|
static void cyz_poll(unsigned long arg)
|
|
{
|
|
struct cyclades_card *cinfo;
|
|
struct cyclades_port *info;
|
|
struct tty_struct *tty;
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct BUF_CTRL __iomem *buf_ctrl;
|
|
unsigned long expires = jiffies + HZ;
|
|
unsigned int port, card;
|
|
|
|
for (card = 0; card < NR_CARDS; card++) {
|
|
cinfo = &cy_card[card];
|
|
|
|
if (!IS_CYC_Z(*cinfo))
|
|
continue;
|
|
if (!ISZLOADED(*cinfo))
|
|
continue;
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
zfw_ctrl = cinfo->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &(zfw_ctrl->board_ctrl);
|
|
|
|
/* Skip first polling cycle to avoid racing conditions with the FW */
|
|
if (!cinfo->intr_enabled) {
|
|
cinfo->nports = (int)readl(&board_ctrl->n_channel);
|
|
cinfo->intr_enabled = 1;
|
|
continue;
|
|
}
|
|
|
|
cyz_handle_cmd(cinfo);
|
|
|
|
for (port = 0; port < cinfo->nports; port++) {
|
|
info = &cinfo->ports[port];
|
|
tty = info->tty;
|
|
buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
|
|
|
|
if (!info->throttle)
|
|
cyz_handle_rx(info, buf_ctrl);
|
|
cyz_handle_tx(info, buf_ctrl);
|
|
}
|
|
/* poll every 'cyz_polling_cycle' period */
|
|
expires = jiffies + cyz_polling_cycle;
|
|
}
|
|
mod_timer(&cyz_timerlist, expires);
|
|
} /* cyz_poll */
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
/********** End of block of Cyclades-Z specific code *********/
|
|
/***********************************************************/
|
|
|
|
/* This is called whenever a port becomes active;
|
|
interrupts are enabled and DTR & RTS are turned on.
|
|
*/
|
|
static int startup(struct cyclades_port *info)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
unsigned long page;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
page = get_zeroed_page(GFP_KERNEL);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
free_page(page);
|
|
goto errout;
|
|
}
|
|
|
|
if (!info->type) {
|
|
if (info->tty) {
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
free_page(page);
|
|
goto errout;
|
|
}
|
|
|
|
if (info->xmit_buf)
|
|
free_page(page);
|
|
else
|
|
info->xmit_buf = (unsigned char *)page;
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
set_line_char(info);
|
|
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
|
|
"base_addr %p\n",
|
|
card, chip, channel, base_addr);
|
|
#endif
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
|
|
|
|
cy_writeb(base_addr + (CyRTPR << index),
|
|
(info->default_timeout ? info->default_timeout : 0x02));
|
|
/* 10ms rx timeout */
|
|
|
|
cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
|
|
index);
|
|
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
|
|
cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
|
|
cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:startup raising DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) | CyRxData);
|
|
info->flags |= ASYNC_INITIALIZED;
|
|
|
|
if (info->tty) {
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
info->breakon = info->breakoff = 0;
|
|
memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
|
|
info->idle_stats.in_use =
|
|
info->idle_stats.recv_idle =
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
} else {
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
base_addr = card->base_addr;
|
|
|
|
firm_id = base_addr + ID_ADDRESS;
|
|
if (!ISZLOADED(*card)) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
zfw_ctrl = card->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
|
|
"base_addr %p\n", card, channel, base_addr);
|
|
#endif
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
|
|
#ifdef Z_WAKE
|
|
#ifdef CONFIG_CYZ_INTR
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
|
|
C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
|
|
#else
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
C_IN_IOCTLW | C_IN_MDCD);
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
#else
|
|
#ifdef CONFIG_CYZ_INTR
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
|
|
C_IN_RXNNDT | C_IN_MDCD);
|
|
#else
|
|
cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
#endif /* Z_WAKE */
|
|
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
|
|
/* Flush RX buffers before raising DTR and RTS */
|
|
retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
|
|
/* set timeout !!! */
|
|
/* set RTS and DTR !!! */
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
|
|
C_RS_DTR);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
|
|
#endif
|
|
|
|
/* enable send, recv, modem !!! */
|
|
|
|
info->flags |= ASYNC_INITIALIZED;
|
|
if (info->tty) {
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
info->breakon = info->breakoff = 0;
|
|
memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
|
|
info->idle_stats.in_use =
|
|
info->idle_stats.recv_idle =
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc startup done\n");
|
|
#endif
|
|
return 0;
|
|
|
|
errout:
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
return retval;
|
|
} /* startup */
|
|
|
|
static void start_xmit(struct cyclades_port *info)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index), channel);
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) | CyTxRdy);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
#ifdef CONFIG_CYZ_INTR
|
|
int retval;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
#else /* CONFIG_CYZ_INTR */
|
|
/* Don't have to do anything at this time */
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
}
|
|
} /* start_xmit */
|
|
|
|
/*
|
|
* This routine shuts down a serial port; interrupts are disabled,
|
|
* and DTR is dropped if the hangup on close termio flag is on.
|
|
*/
|
|
static void shutdown(struct cyclades_port *info)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
|
|
if (!(info->flags & ASYNC_INITIALIZED)) {
|
|
return;
|
|
}
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
|
|
"channel %d, base_addr %p\n",
|
|
card, chip, channel, base_addr);
|
|
#endif
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
/* Clear delta_msr_wait queue to avoid mem leaks. */
|
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
|
|
if (info->xmit_buf) {
|
|
unsigned char *temp;
|
|
temp = info->xmit_buf;
|
|
info->xmit_buf = NULL;
|
|
free_page((unsigned long)temp);
|
|
}
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
|
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
|
|
cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
|
|
cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
}
|
|
cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
|
|
/* it may be appropriate to clear _XMIT at
|
|
some later date (after testing)!!! */
|
|
|
|
if (info->tty) {
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
info->flags &= ~ASYNC_INITIALIZED;
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
int retval;
|
|
|
|
base_addr = card->base_addr;
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
|
|
"base_addr %p\n", card, channel, base_addr);
|
|
#endif
|
|
|
|
firm_id = base_addr + ID_ADDRESS;
|
|
if (!ISZLOADED(*card)) {
|
|
return;
|
|
}
|
|
|
|
zfw_ctrl = card->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
if (info->xmit_buf) {
|
|
unsigned char *temp;
|
|
temp = info->xmit_buf;
|
|
info->xmit_buf = NULL;
|
|
free_page((unsigned long)temp);
|
|
}
|
|
|
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
(__u32)(readl(&ch_ctrl[channel].rs_control) &
|
|
~(C_RS_RTS | C_RS_DTR)));
|
|
retval = cyz_issue_cmd(info->card, channel,
|
|
C_CM_IOCTLM, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
|
|
#endif
|
|
}
|
|
|
|
if (info->tty) {
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
info->flags &= ~ASYNC_INITIALIZED;
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc shutdown done\n");
|
|
#endif
|
|
} /* shutdown */
|
|
|
|
/*
|
|
* ------------------------------------------------------------
|
|
* cy_open() and friends
|
|
* ------------------------------------------------------------
|
|
*/
|
|
|
|
static int
|
|
block_til_ready(struct tty_struct *tty, struct file *filp,
|
|
struct cyclades_port *info)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct cyclades_card *cinfo;
|
|
unsigned long flags;
|
|
int chip, channel, index;
|
|
int retval;
|
|
void __iomem *base_addr;
|
|
|
|
cinfo = info->card;
|
|
channel = info->line - cinfo->first_line;
|
|
|
|
/*
|
|
* If the device is in the middle of being closed, then block
|
|
* until it's done, and then try again.
|
|
*/
|
|
if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
|
|
wait_event_interruptible(info->close_wait,
|
|
!(info->flags & ASYNC_CLOSING));
|
|
return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
|
|
}
|
|
|
|
/*
|
|
* If non-blocking mode is set, then make the check up front
|
|
* and then exit.
|
|
*/
|
|
if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
|
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Block waiting for the carrier detect and the line to become
|
|
* free (i.e., not in use by the callout). While we are in
|
|
* this loop, info->count is dropped by one, so that
|
|
* cy_close() knows when to free things. We restore it upon
|
|
* exit, either normal or abnormal.
|
|
*/
|
|
retval = 0;
|
|
add_wait_queue(&info->open_wait, &wait);
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
|
|
"count = %d\n", info->line, info->count);
|
|
#endif
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
if (!tty_hung_up_p(filp))
|
|
info->count--;
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
|
|
"%d\n", current->pid, info->count);
|
|
#endif
|
|
info->blocked_open++;
|
|
|
|
if (!IS_CYC_Z(*cinfo)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = cinfo->bus_index;
|
|
base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
while (1) {
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
if ((tty->termios->c_cflag & CBAUD)) {
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
CyRTS);
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
CyDTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:block_til_ready raising "
|
|
"DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
}
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (tty_hung_up_p(filp) ||
|
|
!(info->flags & ASYNC_INITIALIZED)) {
|
|
retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
|
|
-EAGAIN : -ERESTARTSYS);
|
|
break;
|
|
}
|
|
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
|
|
(readb(base_addr +
|
|
(CyMSVR1 << index)) & CyDCD))) {
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
|
|
if (signal_pending(current)) {
|
|
retval = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc block_til_ready blocking: "
|
|
"ttyC%d, count = %d\n",
|
|
info->line, info->count);
|
|
#endif
|
|
schedule();
|
|
}
|
|
} else {
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
base_addr = cinfo->base_addr;
|
|
firm_id = base_addr + ID_ADDRESS;
|
|
if (!ISZLOADED(*cinfo)) {
|
|
__set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&info->open_wait, &wait);
|
|
return -EINVAL;
|
|
}
|
|
|
|
zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
while (1) {
|
|
if ((tty->termios->c_cflag & CBAUD)) {
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
readl(&ch_ctrl[channel].rs_control) |
|
|
C_RS_RTS | C_RS_DTR);
|
|
retval = cyz_issue_cmd(cinfo,
|
|
channel, C_CM_IOCTLM, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:block_til_ready "
|
|
"retval on ttyC%d was %x\n",
|
|
info->line, retval);
|
|
}
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:block_til_ready raising "
|
|
"Z DTR\n");
|
|
#endif
|
|
}
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (tty_hung_up_p(filp) ||
|
|
!(info->flags & ASYNC_INITIALIZED)) {
|
|
retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
|
|
-EAGAIN : -ERESTARTSYS);
|
|
break;
|
|
}
|
|
if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
|
|
(readl(&ch_ctrl[channel].rs_status) &
|
|
C_RS_DCD))) {
|
|
break;
|
|
}
|
|
if (signal_pending(current)) {
|
|
retval = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc block_til_ready blocking: "
|
|
"ttyC%d, count = %d\n",
|
|
info->line, info->count);
|
|
#endif
|
|
schedule();
|
|
}
|
|
}
|
|
__set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&info->open_wait, &wait);
|
|
if (!tty_hung_up_p(filp)) {
|
|
info->count++;
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
|
|
"count to %d\n", current->pid, info->count);
|
|
#endif
|
|
}
|
|
info->blocked_open--;
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
|
|
"count = %d\n", info->line, info->count);
|
|
#endif
|
|
if (retval)
|
|
return retval;
|
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
|
return 0;
|
|
} /* block_til_ready */
|
|
|
|
/*
|
|
* This routine is called whenever a serial port is opened. It
|
|
* performs the serial-specific initialization for the tty structure.
|
|
*/
|
|
static int cy_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct cyclades_port *info;
|
|
unsigned int i, line;
|
|
int retval;
|
|
|
|
line = tty->index;
|
|
if ((tty->index < 0) || (NR_PORTS <= line)) {
|
|
return -ENODEV;
|
|
}
|
|
for (i = 0; i < NR_CARDS; i++)
|
|
if (line < cy_card[i].first_line + cy_card[i].nports &&
|
|
line >= cy_card[i].first_line)
|
|
break;
|
|
if (i >= NR_CARDS)
|
|
return -ENODEV;
|
|
info = &cy_card[i].ports[line - cy_card[i].first_line];
|
|
if (info->line < 0) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* If the card's firmware hasn't been loaded,
|
|
treat it as absent from the system. This
|
|
will make the user pay attention.
|
|
*/
|
|
if (IS_CYC_Z(*info->card)) {
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
if (!ISZLOADED(*cinfo)) {
|
|
if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
|
|
(cinfo->ctl_addr))->mail_box_0)) &&
|
|
Z_FPGA_CHECK(*cinfo)) &&
|
|
(ZFIRM_HLT == readl(
|
|
&firm_id->signature))) {
|
|
printk(KERN_ERR "cyc:Cyclades-Z Error: you "
|
|
"need an external power supply for "
|
|
"this number of ports.\nFirmware "
|
|
"halted.\n");
|
|
} else {
|
|
printk(KERN_ERR "cyc:Cyclades-Z firmware not "
|
|
"yet loaded\n");
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
#ifdef CONFIG_CYZ_INTR
|
|
else {
|
|
/* In case this Z board is operating in interrupt mode, its
|
|
interrupts should be enabled as soon as the first open
|
|
happens to one of its ports. */
|
|
if (!cinfo->intr_enabled) {
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
zfw_ctrl = cinfo->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) &
|
|
0xfffff);
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
/* Enable interrupts on the PLX chip */
|
|
cy_writew(cinfo->ctl_addr + 0x68,
|
|
readw(cinfo->ctl_addr + 0x68) | 0x0900);
|
|
/* Enable interrupts on the FW */
|
|
retval = cyz_issue_cmd(cinfo, 0,
|
|
C_CM_IRQ_ENBL, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:IRQ enable retval "
|
|
"was %x\n", retval);
|
|
}
|
|
cinfo->nports =
|
|
(int)readl(&board_ctrl->n_channel);
|
|
cinfo->intr_enabled = 1;
|
|
}
|
|
}
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
/* Make sure this Z port really exists in hardware */
|
|
if (info->line > (cinfo->first_line + cinfo->nports - 1))
|
|
return -ENODEV;
|
|
}
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
|
|
#endif
|
|
tty->driver_data = info;
|
|
info->tty = tty;
|
|
if (serial_paranoia_check(info, tty->name, "cy_open")) {
|
|
return -ENODEV;
|
|
}
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
|
|
info->count);
|
|
#endif
|
|
info->count++;
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
|
|
current->pid, info->count);
|
|
#endif
|
|
|
|
/*
|
|
* If the port is the middle of closing, bail out now
|
|
*/
|
|
if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
|
|
wait_event_interruptible(info->close_wait,
|
|
!(info->flags & ASYNC_CLOSING));
|
|
return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
|
|
}
|
|
|
|
/*
|
|
* Start up serial port
|
|
*/
|
|
retval = startup(info);
|
|
if (retval) {
|
|
return retval;
|
|
}
|
|
|
|
retval = block_til_ready(tty, filp, info);
|
|
if (retval) {
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
|
|
"with %d\n", retval);
|
|
#endif
|
|
return retval;
|
|
}
|
|
|
|
info->throttle = 0;
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_open done\n");
|
|
#endif
|
|
return 0;
|
|
} /* cy_open */
|
|
|
|
/*
|
|
* cy_wait_until_sent() --- wait until the transmitter is empty
|
|
*/
|
|
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
{
|
|
struct cyclades_card *card;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
unsigned long orig_jiffies;
|
|
int char_time;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
|
|
return;
|
|
|
|
if (info->xmit_fifo_size == 0)
|
|
return; /* Just in case.... */
|
|
|
|
orig_jiffies = jiffies;
|
|
/*
|
|
* Set the check interval to be 1/5 of the estimated time to
|
|
* send a single character, and make it at least 1. The check
|
|
* interval should also be less than the timeout.
|
|
*
|
|
* Note: we have to use pretty tight timings here to satisfy
|
|
* the NIST-PCTS.
|
|
*/
|
|
char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
|
|
char_time = char_time / 5;
|
|
if (char_time <= 0)
|
|
char_time = 1;
|
|
if (timeout < 0)
|
|
timeout = 0;
|
|
if (timeout)
|
|
char_time = min(char_time, timeout);
|
|
/*
|
|
* If the transmitter hasn't cleared in twice the approximate
|
|
* amount of time to send the entire FIFO, it probably won't
|
|
* ever clear. This assumes the UART isn't doing flow
|
|
* control, which is currently the case. Hence, if it ever
|
|
* takes longer than info->timeout, this is probably due to a
|
|
* UART bug of some kind. So, we clamp the timeout parameter at
|
|
* 2*info->timeout.
|
|
*/
|
|
if (!timeout || timeout > 2 * info->timeout)
|
|
timeout = 2 * info->timeout;
|
|
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
|
|
printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
|
|
timeout, char_time, jiffies);
|
|
#endif
|
|
card = info->card;
|
|
channel = (info->line) - (card->first_line);
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
|
|
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
|
|
printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
|
|
#endif
|
|
if (msleep_interruptible(jiffies_to_msecs(char_time)))
|
|
break;
|
|
if (timeout && time_after(jiffies, orig_jiffies +
|
|
timeout))
|
|
break;
|
|
}
|
|
}
|
|
/* Run one more char cycle */
|
|
msleep_interruptible(jiffies_to_msecs(char_time * 5));
|
|
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
|
|
printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* This routine is called when a particular tty device is closed.
|
|
*/
|
|
static void cy_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
|
|
return;
|
|
}
|
|
|
|
card = info->card;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
/* If the TTY is being hung up, nothing to do */
|
|
if (tty_hung_up_p(filp)) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
return;
|
|
}
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
|
|
info->count);
|
|
#endif
|
|
if ((tty->count == 1) && (info->count != 1)) {
|
|
/*
|
|
* Uh, oh. tty->count is 1, which means that the tty
|
|
* structure will be freed. Info->count should always
|
|
* be one in these conditions. If it's greater than
|
|
* one, we've got real problems, since it means the
|
|
* serial port won't be shutdown.
|
|
*/
|
|
printk(KERN_ERR "cyc:cy_close: bad serial port count; "
|
|
"tty->count is 1, info->count is %d\n", info->count);
|
|
info->count = 1;
|
|
}
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
|
|
current->pid, info->count - 1);
|
|
#endif
|
|
if (--info->count < 0) {
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
|
|
#endif
|
|
info->count = 0;
|
|
}
|
|
if (info->count) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
return;
|
|
}
|
|
info->flags |= ASYNC_CLOSING;
|
|
|
|
/*
|
|
* Now we wait for the transmit buffer to clear; and we notify
|
|
* the line discipline to only process XON/XOFF characters.
|
|
*/
|
|
tty->closing = 1;
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
|
|
tty_wait_until_sent(tty, info->closing_wait);
|
|
}
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
if (!IS_CYC_Z(*card)) {
|
|
int channel = info->line - card->first_line;
|
|
int index = card->bus_index;
|
|
void __iomem *base_addr = card->base_addr +
|
|
(cy_chip_offset[channel >> 2] << index);
|
|
/* Stop accepting input */
|
|
channel &= 0x03;
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) & ~CyRxData);
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
/* Waiting for on-board buffers to be empty before closing
|
|
the port */
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
cy_wait_until_sent(tty, info->timeout);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
} else {
|
|
#ifdef Z_WAKE
|
|
/* Waiting for on-board buffers to be empty before closing the port */
|
|
void __iomem *base_addr = card->base_addr;
|
|
struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl =
|
|
base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
int channel = info->line - card->first_line;
|
|
int retval;
|
|
|
|
if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_DEBUG "cyc:cy_close retval on "
|
|
"ttyC%d was %x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
wait_for_completion_interruptible(&info->shutdown_wait);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
shutdown(info);
|
|
if (tty->driver->flush_buffer)
|
|
tty->driver->flush_buffer(tty);
|
|
tty_ldisc_flush(tty);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
tty->closing = 0;
|
|
info->tty = NULL;
|
|
if (info->blocked_open) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
if (info->close_delay) {
|
|
msleep_interruptible(jiffies_to_msecs
|
|
(info->close_delay));
|
|
}
|
|
wake_up_interruptible(&info->open_wait);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
|
|
wake_up_interruptible(&info->close_wait);
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_close done\n");
|
|
#endif
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} /* cy_close */
|
|
|
|
/* This routine gets called when tty_write has put something into
|
|
* the write_queue. The characters may come from user space or
|
|
* kernel space.
|
|
*
|
|
* This routine will return the number of characters actually
|
|
* accepted for writing.
|
|
*
|
|
* If the port is not already transmitting stuff, start it off by
|
|
* enabling interrupts. The interrupt service routine will then
|
|
* ensure that the characters are sent.
|
|
* If the port is already active, there is no need to kick it.
|
|
*
|
|
*/
|
|
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
int c, ret = 0;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_write")) {
|
|
return 0;
|
|
}
|
|
|
|
if (!info->xmit_buf)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
while (1) {
|
|
c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
|
|
(int)(SERIAL_XMIT_SIZE - info->xmit_head)));
|
|
|
|
if (c <= 0)
|
|
break;
|
|
|
|
memcpy(info->xmit_buf + info->xmit_head, buf, c);
|
|
info->xmit_head = (info->xmit_head + c) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
info->xmit_cnt += c;
|
|
buf += c;
|
|
count -= c;
|
|
ret += c;
|
|
}
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
|
|
info->idle_stats.xmit_bytes += ret;
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
|
|
start_xmit(info);
|
|
}
|
|
return ret;
|
|
} /* cy_write */
|
|
|
|
/*
|
|
* This routine is called by the kernel to write a single
|
|
* character to the tty device. If the kernel uses this routine,
|
|
* it must call the flush_chars() routine (if defined) when it is
|
|
* done stuffing characters into the driver. If there is no room
|
|
* in the queue, the character is ignored.
|
|
*/
|
|
static void cy_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_put_char"))
|
|
return;
|
|
|
|
if (!info->xmit_buf)
|
|
return;
|
|
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
return;
|
|
}
|
|
|
|
info->xmit_buf[info->xmit_head++] = ch;
|
|
info->xmit_head &= SERIAL_XMIT_SIZE - 1;
|
|
info->xmit_cnt++;
|
|
info->idle_stats.xmit_bytes++;
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
} /* cy_put_char */
|
|
|
|
/*
|
|
* This routine is called by the kernel after it has written a
|
|
* series of characters to the tty device using put_char().
|
|
*/
|
|
static void cy_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
|
|
return;
|
|
|
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
|
!info->xmit_buf)
|
|
return;
|
|
|
|
start_xmit(info);
|
|
} /* cy_flush_chars */
|
|
|
|
/*
|
|
* This routine returns the numbers of characters the tty driver
|
|
* will accept for queuing to be written. This number is subject
|
|
* to change as output buffers get emptied, or if the output flow
|
|
* control is activated.
|
|
*/
|
|
static int cy_write_room(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
int ret;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_write_room"))
|
|
return 0;
|
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
|
if (ret < 0)
|
|
ret = 0;
|
|
return ret;
|
|
} /* cy_write_room */
|
|
|
|
static int cy_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *card;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
int channel;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
|
|
return 0;
|
|
|
|
card = info->card;
|
|
channel = (info->line) - (card->first_line);
|
|
|
|
#ifdef Z_EXT_CHARS_IN_BUFFER
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
#endif /* Z_EXT_CHARS_IN_BUFFER */
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
|
|
info->line, info->xmit_cnt);
|
|
#endif
|
|
return info->xmit_cnt;
|
|
#ifdef Z_EXT_CHARS_IN_BUFFER
|
|
} else {
|
|
static struct FIRM_ID *firm_id;
|
|
static struct ZFW_CTRL *zfw_ctrl;
|
|
static struct CH_CTRL *ch_ctrl;
|
|
static struct BUF_CTRL *buf_ctrl;
|
|
int char_count;
|
|
__u32 tx_put, tx_get, tx_bufsize;
|
|
|
|
firm_id = card->base_addr + ID_ADDRESS;
|
|
zfw_ctrl = card->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
|
|
buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
|
|
|
|
tx_get = readl(&buf_ctrl->tx_get);
|
|
tx_put = readl(&buf_ctrl->tx_put);
|
|
tx_bufsize = readl(&buf_ctrl->tx_bufsize);
|
|
if (tx_put >= tx_get)
|
|
char_count = tx_put - tx_get;
|
|
else
|
|
char_count = tx_put - tx_get + tx_bufsize;
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
|
|
info->line, info->xmit_cnt + char_count);
|
|
#endif
|
|
return info->xmit_cnt + char_count;
|
|
}
|
|
#endif /* Z_EXT_CHARS_IN_BUFFER */
|
|
} /* cy_chars_in_buffer */
|
|
|
|
/*
|
|
* ------------------------------------------------------------
|
|
* cy_ioctl() and friends
|
|
* ------------------------------------------------------------
|
|
*/
|
|
|
|
static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
|
|
{
|
|
int co, co_val, bpr;
|
|
__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
|
|
25000000);
|
|
|
|
if (baud == 0) {
|
|
info->tbpr = info->tco = info->rbpr = info->rco = 0;
|
|
return;
|
|
}
|
|
|
|
/* determine which prescaler to use */
|
|
for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
|
|
if (cy_clock / co_val / baud > 63)
|
|
break;
|
|
}
|
|
|
|
bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
|
|
if (bpr > 255)
|
|
bpr = 255;
|
|
|
|
info->tbpr = info->rbpr = bpr;
|
|
info->tco = info->rco = co;
|
|
}
|
|
|
|
/*
|
|
* This routine finds or computes the various line characteristics.
|
|
* It used to be called config_setup
|
|
*/
|
|
static void set_line_char(struct cyclades_port *info)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
unsigned cflag, iflag;
|
|
unsigned short chip_number;
|
|
int baud, baud_rate = 0;
|
|
int i;
|
|
|
|
if (!info->tty || !info->tty->termios) {
|
|
return;
|
|
}
|
|
if (info->line == -1) {
|
|
return;
|
|
}
|
|
cflag = info->tty->termios->c_cflag;
|
|
iflag = info->tty->termios->c_iflag;
|
|
|
|
/*
|
|
* Set up the tty->alt_speed kludge
|
|
*/
|
|
if (info->tty) {
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
|
info->tty->alt_speed = 57600;
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
|
info->tty->alt_speed = 115200;
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
|
|
info->tty->alt_speed = 230400;
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
|
|
info->tty->alt_speed = 460800;
|
|
}
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
chip_number = channel / 4;
|
|
|
|
if (!IS_CYC_Z(*card)) {
|
|
|
|
index = card->bus_index;
|
|
|
|
/* baud rate */
|
|
baud = tty_get_baud_rate(info->tty);
|
|
if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
if (info->custom_divisor)
|
|
baud_rate = info->baud / info->custom_divisor;
|
|
else
|
|
baud_rate = info->baud;
|
|
} else if (baud > CD1400_MAX_SPEED) {
|
|
baud = CD1400_MAX_SPEED;
|
|
}
|
|
/* find the baud index */
|
|
for (i = 0; i < 20; i++) {
|
|
if (baud == baud_table[i]) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == 20) {
|
|
i = 19; /* CD1400_MAX_SPEED */
|
|
}
|
|
|
|
if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
cyy_baud_calc(info, baud_rate);
|
|
} else {
|
|
if (info->chip_rev >= CD1400_REV_J) {
|
|
/* It is a CD1400 rev. J or later */
|
|
info->tbpr = baud_bpr_60[i]; /* Tx BPR */
|
|
info->tco = baud_co_60[i]; /* Tx CO */
|
|
info->rbpr = baud_bpr_60[i]; /* Rx BPR */
|
|
info->rco = baud_co_60[i]; /* Rx CO */
|
|
} else {
|
|
info->tbpr = baud_bpr_25[i]; /* Tx BPR */
|
|
info->tco = baud_co_25[i]; /* Tx CO */
|
|
info->rbpr = baud_bpr_25[i]; /* Rx BPR */
|
|
info->rco = baud_co_25[i]; /* Rx CO */
|
|
}
|
|
}
|
|
if (baud_table[i] == 134) {
|
|
/* get it right for 134.5 baud */
|
|
info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
|
|
2;
|
|
} else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud_rate) + 2;
|
|
} else if (baud_table[i]) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud_table[i]) + 2;
|
|
/* this needs to be propagated into the card info */
|
|
} else {
|
|
info->timeout = 0;
|
|
}
|
|
/* By tradition (is it a standard?) a baud rate of zero
|
|
implies the line should be/has been closed. A bit
|
|
later in this routine such a test is performed. */
|
|
|
|
/* byte size and parity */
|
|
info->cor5 = 0;
|
|
info->cor4 = 0;
|
|
/* receive threshold */
|
|
info->cor3 = (info->default_threshold ?
|
|
info->default_threshold : baud_cor3[i]);
|
|
info->cor2 = CyETC;
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
info->cor1 = Cy_5_BITS;
|
|
break;
|
|
case CS6:
|
|
info->cor1 = Cy_6_BITS;
|
|
break;
|
|
case CS7:
|
|
info->cor1 = Cy_7_BITS;
|
|
break;
|
|
case CS8:
|
|
info->cor1 = Cy_8_BITS;
|
|
break;
|
|
}
|
|
if (cflag & CSTOPB) {
|
|
info->cor1 |= Cy_2_STOP;
|
|
}
|
|
if (cflag & PARENB) {
|
|
if (cflag & PARODD) {
|
|
info->cor1 |= CyPARITY_O;
|
|
} else {
|
|
info->cor1 |= CyPARITY_E;
|
|
}
|
|
} else {
|
|
info->cor1 |= CyPARITY_NONE;
|
|
}
|
|
|
|
/* CTS flow control flag */
|
|
if (cflag & CRTSCTS) {
|
|
info->flags |= ASYNC_CTS_FLOW;
|
|
info->cor2 |= CyCtsAE;
|
|
} else {
|
|
info->flags &= ~ASYNC_CTS_FLOW;
|
|
info->cor2 &= ~CyCtsAE;
|
|
}
|
|
if (cflag & CLOCAL)
|
|
info->flags &= ~ASYNC_CHECK_CD;
|
|
else
|
|
info->flags |= ASYNC_CHECK_CD;
|
|
|
|
/***********************************************
|
|
The hardware option, CyRtsAO, presents RTS when
|
|
the chip has characters to send. Since most modems
|
|
use RTS as reverse (inbound) flow control, this
|
|
option is not used. If inbound flow control is
|
|
necessary, DTR can be programmed to provide the
|
|
appropriate signals for use with a non-standard
|
|
cable. Contact Marcio Saito for details.
|
|
***********************************************/
|
|
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
|
|
|
|
/* tx and rx baud rate */
|
|
|
|
cy_writeb(base_addr + (CyTCOR << index), info->tco);
|
|
cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
|
|
cy_writeb(base_addr + (CyRCOR << index), info->rco);
|
|
cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
|
|
|
|
/* set line characteristics according configuration */
|
|
|
|
cy_writeb(base_addr + (CySCHR1 << index),
|
|
START_CHAR(info->tty));
|
|
cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
|
|
cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
|
|
cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
|
|
cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
|
|
cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
|
|
cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
|
|
|
|
cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
|
|
CyCOR3ch, index);
|
|
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
|
|
cy_writeb(base_addr + (CyRTPR << index),
|
|
(info->default_timeout ? info->default_timeout : 0x02));
|
|
/* 10ms rx timeout */
|
|
|
|
if (C_CLOCAL(info->tty)) {
|
|
/* without modem intr */
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) | CyMdmCh);
|
|
/* act on 1->0 modem transitions */
|
|
if ((cflag & CRTSCTS) && info->rflow) {
|
|
cy_writeb(base_addr + (CyMCOR1 << index),
|
|
(CyCTS | rflow_thr[i]));
|
|
} else {
|
|
cy_writeb(base_addr + (CyMCOR1 << index),
|
|
CyCTS);
|
|
}
|
|
/* act on 0->1 modem transitions */
|
|
cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
|
|
} else {
|
|
/* without modem intr */
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr +
|
|
(CySRER << index)) | CyMdmCh);
|
|
/* act on 1->0 modem transitions */
|
|
if ((cflag & CRTSCTS) && info->rflow) {
|
|
cy_writeb(base_addr + (CyMCOR1 << index),
|
|
(CyDSR | CyCTS | CyRI | CyDCD |
|
|
rflow_thr[i]));
|
|
} else {
|
|
cy_writeb(base_addr + (CyMCOR1 << index),
|
|
CyDSR | CyCTS | CyRI | CyDCD);
|
|
}
|
|
/* act on 0->1 modem transitions */
|
|
cy_writeb(base_addr + (CyMCOR2 << index),
|
|
CyDSR | CyCTS | CyRI | CyDCD);
|
|
}
|
|
|
|
if (i == 0) { /* baud rate is zero, turn off line */
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
~CyRTS);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
~CyDTR);
|
|
}
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
} else {
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
CyRTS);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
CyDTR);
|
|
}
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
}
|
|
|
|
if (info->tty) {
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
} else {
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
struct BUF_CTRL __iomem *buf_ctrl;
|
|
__u32 sw_flow;
|
|
int retval;
|
|
|
|
firm_id = card->base_addr + ID_ADDRESS;
|
|
if (!ISZLOADED(*card)) {
|
|
return;
|
|
}
|
|
|
|
zfw_ctrl = card->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
|
|
buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
|
|
|
|
/* baud rate */
|
|
baud = tty_get_baud_rate(info->tty);
|
|
if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
if (info->custom_divisor)
|
|
baud_rate = info->baud / info->custom_divisor;
|
|
else
|
|
baud_rate = info->baud;
|
|
} else if (baud > CYZ_MAX_SPEED) {
|
|
baud = CYZ_MAX_SPEED;
|
|
}
|
|
cy_writel(&ch_ctrl->comm_baud, baud);
|
|
|
|
if (baud == 134) {
|
|
/* get it right for 134.5 baud */
|
|
info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
|
|
2;
|
|
} else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud_rate) + 2;
|
|
} else if (baud) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud) + 2;
|
|
/* this needs to be propagated into the card info */
|
|
} else {
|
|
info->timeout = 0;
|
|
}
|
|
|
|
/* byte size and parity */
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
|
|
break;
|
|
case CS6:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
|
|
break;
|
|
case CS7:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
|
|
break;
|
|
case CS8:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
|
|
break;
|
|
}
|
|
if (cflag & CSTOPB) {
|
|
cy_writel(&ch_ctrl->comm_data_l,
|
|
readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
|
|
} else {
|
|
cy_writel(&ch_ctrl->comm_data_l,
|
|
readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
|
|
}
|
|
if (cflag & PARENB) {
|
|
if (cflag & PARODD) {
|
|
cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
|
|
} else {
|
|
cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
|
|
}
|
|
} else {
|
|
cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
|
|
}
|
|
|
|
/* CTS flow control flag */
|
|
if (cflag & CRTSCTS) {
|
|
cy_writel(&ch_ctrl->hw_flow,
|
|
readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
|
|
} else {
|
|
cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
|
|
~(C_RS_CTS | C_RS_RTS));
|
|
}
|
|
/* As the HW flow control is done in firmware, the driver
|
|
doesn't need to care about it */
|
|
info->flags &= ~ASYNC_CTS_FLOW;
|
|
|
|
/* XON/XOFF/XANY flow control flags */
|
|
sw_flow = 0;
|
|
if (iflag & IXON) {
|
|
sw_flow |= C_FL_OXX;
|
|
if (iflag & IXANY)
|
|
sw_flow |= C_FL_OIXANY;
|
|
}
|
|
cy_writel(&ch_ctrl->sw_flow, sw_flow);
|
|
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
|
|
/* CD sensitivity */
|
|
if (cflag & CLOCAL) {
|
|
info->flags &= ~ASYNC_CHECK_CD;
|
|
} else {
|
|
info->flags |= ASYNC_CHECK_CD;
|
|
}
|
|
|
|
if (baud == 0) { /* baud rate is zero, turn off line */
|
|
cy_writel(&ch_ctrl->rs_control,
|
|
readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
|
|
#endif
|
|
} else {
|
|
cy_writel(&ch_ctrl->rs_control,
|
|
readl(&ch_ctrl->rs_control) | C_RS_DTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
|
|
#endif
|
|
}
|
|
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
|
|
if (info->tty) {
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
}
|
|
}
|
|
} /* set_line_char */
|
|
|
|
static int
|
|
get_serial_info(struct cyclades_port *info,
|
|
struct serial_struct __user * retinfo)
|
|
{
|
|
struct serial_struct tmp;
|
|
struct cyclades_card *cinfo = info->card;
|
|
|
|
if (!retinfo)
|
|
return -EFAULT;
|
|
memset(&tmp, 0, sizeof(tmp));
|
|
tmp.type = info->type;
|
|
tmp.line = info->line;
|
|
tmp.port = (info->card - cy_card) * 0x100 + info->line -
|
|
cinfo->first_line;
|
|
tmp.irq = cinfo->irq;
|
|
tmp.flags = info->flags;
|
|
tmp.close_delay = info->close_delay;
|
|
tmp.closing_wait = info->closing_wait;
|
|
tmp.baud_base = info->baud;
|
|
tmp.custom_divisor = info->custom_divisor;
|
|
tmp.hub6 = 0; /*!!! */
|
|
return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
|
|
} /* get_serial_info */
|
|
|
|
static int
|
|
set_serial_info(struct cyclades_port *info,
|
|
struct serial_struct __user * new_info)
|
|
{
|
|
struct serial_struct new_serial;
|
|
struct cyclades_port old_info;
|
|
|
|
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
|
|
return -EFAULT;
|
|
old_info = *info;
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if (new_serial.close_delay != info->close_delay ||
|
|
new_serial.baud_base != info->baud ||
|
|
(new_serial.flags & ASYNC_FLAGS &
|
|
~ASYNC_USR_MASK) !=
|
|
(info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
|
|
return -EPERM;
|
|
info->flags = (info->flags & ~ASYNC_USR_MASK) |
|
|
(new_serial.flags & ASYNC_USR_MASK);
|
|
info->baud = new_serial.baud_base;
|
|
info->custom_divisor = new_serial.custom_divisor;
|
|
goto check_and_exit;
|
|
}
|
|
|
|
/*
|
|
* OK, past this point, all the error checking has been done.
|
|
* At this point, we start making changes.....
|
|
*/
|
|
|
|
info->baud = new_serial.baud_base;
|
|
info->custom_divisor = new_serial.custom_divisor;
|
|
info->flags = (info->flags & ~ASYNC_FLAGS) |
|
|
(new_serial.flags & ASYNC_FLAGS);
|
|
info->close_delay = new_serial.close_delay * HZ / 100;
|
|
info->closing_wait = new_serial.closing_wait * HZ / 100;
|
|
|
|
check_and_exit:
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
set_line_char(info);
|
|
return 0;
|
|
} else {
|
|
return startup(info);
|
|
}
|
|
} /* set_serial_info */
|
|
|
|
/*
|
|
* get_lsr_info - get line status register info
|
|
*
|
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
|
* is emptied. On bus types like RS485, the transmitter must
|
|
* release the bus after transmitting. This must be done when
|
|
* the transmit shift register is empty, not be done when the
|
|
* transmit holding register is empty. This functionality
|
|
* allows an RS485 driver to be written in user space.
|
|
*/
|
|
static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
|
|
{
|
|
struct cyclades_card *card;
|
|
int chip, channel, index;
|
|
unsigned char status;
|
|
unsigned int result;
|
|
unsigned long flags;
|
|
void __iomem *base_addr;
|
|
|
|
card = info->card;
|
|
channel = (info->line) - (card->first_line);
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
status = readb(base_addr + (CySRER << index)) &
|
|
(CyTxRdy | CyTxMpty);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
result = (status ? 0 : TIOCSER_TEMT);
|
|
} else {
|
|
/* Not supported yet */
|
|
return -EINVAL;
|
|
}
|
|
return put_user(result, (unsigned long __user *)value);
|
|
}
|
|
|
|
static int cy_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int chip, channel, index;
|
|
void __iomem *base_addr;
|
|
unsigned long flags;
|
|
unsigned char status;
|
|
unsigned long lstatus;
|
|
unsigned int result;
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
if (serial_paranoia_check(info, tty->name, __FUNCTION__))
|
|
return -ENODEV;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
|
|
status = readb(base_addr + (CyMSVR1 << index));
|
|
status |= readb(base_addr + (CyMSVR2 << index));
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
if (info->rtsdtr_inv) {
|
|
result = ((status & CyRTS) ? TIOCM_DTR : 0) |
|
|
((status & CyDTR) ? TIOCM_RTS : 0);
|
|
} else {
|
|
result = ((status & CyRTS) ? TIOCM_RTS : 0) |
|
|
((status & CyDTR) ? TIOCM_DTR : 0);
|
|
}
|
|
result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
|
|
((status & CyRI) ? TIOCM_RNG : 0) |
|
|
((status & CyDSR) ? TIOCM_DSR : 0) |
|
|
((status & CyCTS) ? TIOCM_CTS : 0);
|
|
} else {
|
|
base_addr = card->base_addr;
|
|
firm_id = card->base_addr + ID_ADDRESS;
|
|
if (ISZLOADED(*card)) {
|
|
zfw_ctrl = card->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
lstatus = readl(&ch_ctrl[channel].rs_status);
|
|
result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
|
|
((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
|
|
((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
|
|
((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
|
|
((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
|
|
((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
|
|
} else {
|
|
result = 0;
|
|
return -ENODEV;
|
|
}
|
|
|
|
}
|
|
return result;
|
|
} /* cy_tiomget */
|
|
|
|
static int
|
|
cy_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int chip, channel, index;
|
|
void __iomem *base_addr;
|
|
unsigned long flags;
|
|
struct FIRM_ID __iomem *firm_id;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
int retval;
|
|
|
|
if (serial_paranoia_check(info, tty->name, __FUNCTION__))
|
|
return -ENODEV;
|
|
|
|
card = info->card;
|
|
channel = (info->line) - (card->first_line);
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
if (set & TIOCM_RTS) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
CyDTR);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
CyRTS);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
if (clear & TIOCM_RTS) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
~CyDTR);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
~CyRTS);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
if (set & TIOCM_DTR) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
CyRTS);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
CyDTR);
|
|
}
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
if (clear & TIOCM_DTR) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
~CyRTS);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
~CyDTR);
|
|
}
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
readb(base_addr + (CyMSVR1 << index)),
|
|
readb(base_addr + (CyMSVR2 << index)));
|
|
#endif
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
} else {
|
|
base_addr = card->base_addr;
|
|
|
|
firm_id = card->base_addr + ID_ADDRESS;
|
|
if (ISZLOADED(*card)) {
|
|
zfw_ctrl = card->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
if (set & TIOCM_RTS) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
readl(&ch_ctrl[channel].rs_control) |
|
|
C_RS_RTS);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
if (clear & TIOCM_RTS) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
readl(&ch_ctrl[channel].rs_control) &
|
|
~C_RS_RTS);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
if (set & TIOCM_DTR) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
readl(&ch_ctrl[channel].rs_control) |
|
|
C_RS_DTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info raising "
|
|
"Z DTR\n");
|
|
#endif
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
if (clear & TIOCM_DTR) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
readl(&ch_ctrl[channel].rs_control) &
|
|
~C_RS_DTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info clearing "
|
|
"Z DTR\n");
|
|
#endif
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
} else {
|
|
return -ENODEV;
|
|
}
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
return 0;
|
|
} /* cy_tiocmset */
|
|
|
|
/*
|
|
* cy_break() --- routine which turns the break handling on or off
|
|
*/
|
|
static void cy_break(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_break"))
|
|
return;
|
|
|
|
card = info->card;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
if (!IS_CYC_Z(*card)) {
|
|
/* Let the transmit ISR take care of this (since it
|
|
requires stuffing characters into the output stream).
|
|
*/
|
|
if (break_state == -1) {
|
|
if (!info->breakon) {
|
|
info->breakon = 1;
|
|
if (!info->xmit_cnt) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
start_xmit(info);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
}
|
|
} else {
|
|
if (!info->breakoff) {
|
|
info->breakoff = 1;
|
|
if (!info->xmit_cnt) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
start_xmit(info);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
int retval;
|
|
|
|
if (break_state == -1) {
|
|
retval = cyz_issue_cmd(card,
|
|
info->line - card->first_line,
|
|
C_CM_SET_BREAK, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:cy_break (set) retval on "
|
|
"ttyC%d was %x\n", info->line, retval);
|
|
}
|
|
} else {
|
|
retval = cyz_issue_cmd(card,
|
|
info->line - card->first_line,
|
|
C_CM_CLR_BREAK, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_DEBUG "cyc:cy_break (clr) retval "
|
|
"on ttyC%d was %x\n", info->line,
|
|
retval);
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} /* cy_break */
|
|
|
|
static int
|
|
get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
|
|
{
|
|
|
|
if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
|
|
return -EFAULT;
|
|
info->mon.int_count = 0;
|
|
info->mon.char_count = 0;
|
|
info->mon.char_max = 0;
|
|
info->mon.char_last = 0;
|
|
return 0;
|
|
} /* get_mon_info */
|
|
|
|
static int set_threshold(struct cyclades_port *info, unsigned long value)
|
|
{
|
|
struct cyclades_card *card;
|
|
void __iomem *base_addr;
|
|
int channel, chip, index;
|
|
unsigned long flags;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr =
|
|
card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
info->cor3 &= ~CyREC_FIFO;
|
|
info->cor3 |= value & CyREC_FIFO;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
|
|
cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
return 0;
|
|
} /* set_threshold */
|
|
|
|
static int
|
|
get_threshold(struct cyclades_port *info, unsigned long __user * value)
|
|
{
|
|
struct cyclades_card *card;
|
|
void __iomem *base_addr;
|
|
int channel, chip, index;
|
|
unsigned long tmp;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
|
|
return put_user(tmp, value);
|
|
}
|
|
return 0;
|
|
} /* get_threshold */
|
|
|
|
static int
|
|
set_default_threshold(struct cyclades_port *info, unsigned long value)
|
|
{
|
|
info->default_threshold = value & 0x0f;
|
|
return 0;
|
|
} /* set_default_threshold */
|
|
|
|
static int
|
|
get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
|
|
{
|
|
return put_user(info->default_threshold, value);
|
|
} /* get_default_threshold */
|
|
|
|
static int set_timeout(struct cyclades_port *info, unsigned long value)
|
|
{
|
|
struct cyclades_card *card;
|
|
void __iomem *base_addr;
|
|
int channel, chip, index;
|
|
unsigned long flags;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
return 0;
|
|
} /* set_timeout */
|
|
|
|
static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
|
|
{
|
|
struct cyclades_card *card;
|
|
void __iomem *base_addr;
|
|
int channel, chip, index;
|
|
unsigned long tmp;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
tmp = readb(base_addr + (CyRTPR << index));
|
|
return put_user(tmp, value);
|
|
}
|
|
return 0;
|
|
} /* get_timeout */
|
|
|
|
static int set_default_timeout(struct cyclades_port *info, unsigned long value)
|
|
{
|
|
info->default_timeout = value & 0xff;
|
|
return 0;
|
|
} /* set_default_timeout */
|
|
|
|
static int
|
|
get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
|
|
{
|
|
return put_user(info->default_timeout, value);
|
|
} /* get_default_timeout */
|
|
|
|
/*
|
|
* This routine allows the tty driver to implement device-
|
|
* specific ioctl's. If the ioctl number passed in cmd is
|
|
* not recognized by the driver, it should return ENOIOCTLCMD.
|
|
*/
|
|
static int
|
|
cy_ioctl(struct tty_struct *tty, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_icount cprev, cnow; /* kernel counter temps */
|
|
struct serial_icounter_struct __user *p_cuser; /* user space */
|
|
int ret_val = 0;
|
|
unsigned long flags;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
|
|
return -ENODEV;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
|
|
info->line, cmd, arg);
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case CYGETMON:
|
|
ret_val = get_mon_info(info, argp);
|
|
break;
|
|
case CYGETTHRESH:
|
|
ret_val = get_threshold(info, argp);
|
|
break;
|
|
case CYSETTHRESH:
|
|
ret_val = set_threshold(info, arg);
|
|
break;
|
|
case CYGETDEFTHRESH:
|
|
ret_val = get_default_threshold(info, argp);
|
|
break;
|
|
case CYSETDEFTHRESH:
|
|
ret_val = set_default_threshold(info, arg);
|
|
break;
|
|
case CYGETTIMEOUT:
|
|
ret_val = get_timeout(info, argp);
|
|
break;
|
|
case CYSETTIMEOUT:
|
|
ret_val = set_timeout(info, arg);
|
|
break;
|
|
case CYGETDEFTIMEOUT:
|
|
ret_val = get_default_timeout(info, argp);
|
|
break;
|
|
case CYSETDEFTIMEOUT:
|
|
ret_val = set_default_timeout(info, arg);
|
|
break;
|
|
case CYSETRFLOW:
|
|
info->rflow = (int)arg;
|
|
ret_val = 0;
|
|
break;
|
|
case CYGETRFLOW:
|
|
ret_val = info->rflow;
|
|
break;
|
|
case CYSETRTSDTR_INV:
|
|
info->rtsdtr_inv = (int)arg;
|
|
ret_val = 0;
|
|
break;
|
|
case CYGETRTSDTR_INV:
|
|
ret_val = info->rtsdtr_inv;
|
|
break;
|
|
case CYGETCD1400VER:
|
|
ret_val = info->chip_rev;
|
|
break;
|
|
#ifndef CONFIG_CYZ_INTR
|
|
case CYZSETPOLLCYCLE:
|
|
cyz_polling_cycle = (arg * HZ) / 1000;
|
|
ret_val = 0;
|
|
break;
|
|
case CYZGETPOLLCYCLE:
|
|
ret_val = (cyz_polling_cycle * 1000) / HZ;
|
|
break;
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
case CYSETWAIT:
|
|
info->closing_wait = (unsigned short)arg *HZ / 100;
|
|
ret_val = 0;
|
|
break;
|
|
case CYGETWAIT:
|
|
ret_val = info->closing_wait / (HZ / 100);
|
|
break;
|
|
case TIOCGSERIAL:
|
|
ret_val = get_serial_info(info, argp);
|
|
break;
|
|
case TIOCSSERIAL:
|
|
ret_val = set_serial_info(info, argp);
|
|
break;
|
|
case TIOCSERGETLSR: /* Get line status register */
|
|
ret_val = get_lsr_info(info, argp);
|
|
break;
|
|
/*
|
|
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
|
* - mask passed in arg for lines of interest
|
|
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
|
* Caller should use TIOCGICOUNT to see which one it was
|
|
*/
|
|
case TIOCMIWAIT:
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
/* note the counters on entry */
|
|
cnow = info->icount;
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
ret_val = wait_event_interruptible(info->delta_msr_wait, ({
|
|
cprev = cnow;
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
cnow = info->icount; /* atomic copy */
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
|
|
((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
|
|
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
|
|
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
|
|
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
|
|
}));
|
|
break;
|
|
|
|
/*
|
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
|
* Return: write counters to the user passed counter struct
|
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
|
* RI where only 0->1 is counted.
|
|
*/
|
|
case TIOCGICOUNT:
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
cnow = info->icount;
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
p_cuser = argp;
|
|
ret_val = put_user(cnow.cts, &p_cuser->cts);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.dsr, &p_cuser->dsr);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.rng, &p_cuser->rng);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.dcd, &p_cuser->dcd);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.rx, &p_cuser->rx);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.tx, &p_cuser->tx);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.frame, &p_cuser->frame);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.overrun, &p_cuser->overrun);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.parity, &p_cuser->parity);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.brk, &p_cuser->brk);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
|
|
if (ret_val)
|
|
return ret_val;
|
|
ret_val = 0;
|
|
break;
|
|
default:
|
|
ret_val = -ENOIOCTLCMD;
|
|
}
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_ioctl done\n");
|
|
#endif
|
|
|
|
return ret_val;
|
|
} /* cy_ioctl */
|
|
|
|
/*
|
|
* This routine allows the tty driver to be notified when
|
|
* device's termios settings have changed. Note that a
|
|
* well-designed tty driver should be prepared to accept the case
|
|
* where old == NULL, and try to do something rational.
|
|
*/
|
|
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
set_line_char(info);
|
|
|
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
|
tty->hw_stopped = 0;
|
|
cy_start(tty);
|
|
}
|
|
#if 0
|
|
/*
|
|
* No need to wake up processes in open wait, since they
|
|
* sample the CLOCAL flag once, and don't recheck it.
|
|
* XXX It's not clear whether the current behavior is correct
|
|
* or not. Hence, this may change.....
|
|
*/
|
|
if (!(old_termios->c_cflag & CLOCAL) &&
|
|
(tty->termios->c_cflag & CLOCAL))
|
|
wake_up_interruptible(&info->open_wait);
|
|
#endif
|
|
} /* cy_set_termios */
|
|
|
|
/* This function is used to send a high-priority XON/XOFF character to
|
|
the device.
|
|
*/
|
|
static void cy_send_xchar(struct tty_struct *tty, char ch)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int channel;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
|
|
return;
|
|
|
|
info->x_char = ch;
|
|
|
|
if (ch)
|
|
cy_start(tty);
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
if (IS_CYC_Z(*card)) {
|
|
if (ch == STOP_CHAR(tty))
|
|
cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
|
|
else if (ch == START_CHAR(tty))
|
|
cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
|
|
}
|
|
}
|
|
|
|
/* This routine is called by the upper-layer tty layer to signal
|
|
that incoming characters should be throttled because the input
|
|
buffers are close to full.
|
|
*/
|
|
static void cy_throttle(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
|
|
#ifdef CY_DEBUG_THROTTLE
|
|
char buf[64];
|
|
|
|
printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
|
|
tty->ldisc.chars_in_buffer(tty), info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
|
|
return;
|
|
}
|
|
|
|
card = info->card;
|
|
|
|
if (I_IXOFF(tty)) {
|
|
if (!IS_CYC_Z(*card))
|
|
cy_send_xchar(tty, STOP_CHAR(tty));
|
|
else
|
|
info->throttle = 1;
|
|
}
|
|
|
|
if (tty->termios->c_cflag & CRTSCTS) {
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr +
|
|
(cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
~CyDTR);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
~CyRTS);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
info->throttle = 1;
|
|
}
|
|
}
|
|
} /* cy_throttle */
|
|
|
|
/*
|
|
* This routine notifies the tty driver that it should signal
|
|
* that characters can now be sent to the tty without fear of
|
|
* overrunning the input buffers of the line disciplines.
|
|
*/
|
|
static void cy_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
|
|
#ifdef CY_DEBUG_THROTTLE
|
|
char buf[64];
|
|
|
|
printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
|
|
tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
|
|
return;
|
|
}
|
|
|
|
if (I_IXOFF(tty)) {
|
|
if (info->x_char)
|
|
info->x_char = 0;
|
|
else
|
|
cy_send_xchar(tty, START_CHAR(tty));
|
|
}
|
|
|
|
if (tty->termios->c_cflag & CRTSCTS) {
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
if (!IS_CYC_Z(*card)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
index = card->bus_index;
|
|
base_addr = card->base_addr +
|
|
(cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char) channel);
|
|
if (info->rtsdtr_inv) {
|
|
cy_writeb(base_addr + (CyMSVR2 << index),
|
|
CyDTR);
|
|
} else {
|
|
cy_writeb(base_addr + (CyMSVR1 << index),
|
|
CyRTS);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
info->throttle = 0;
|
|
}
|
|
}
|
|
} /* cy_unthrottle */
|
|
|
|
/* cy_start and cy_stop provide software output flow control as a
|
|
function of XON/XOFF, software CTS, and other such stuff.
|
|
*/
|
|
static void cy_stop(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *cinfo;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_stop"))
|
|
return;
|
|
|
|
cinfo = info->card;
|
|
channel = info->line - cinfo->first_line;
|
|
if (!IS_CYC_Z(*cinfo)) {
|
|
index = cinfo->bus_index;
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index),
|
|
(u_char)(channel & 0x0003)); /* index channel */
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) & ~CyTxRdy);
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
}
|
|
} /* cy_stop */
|
|
|
|
static void cy_start(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *cinfo;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
void __iomem *base_addr;
|
|
int chip, channel, index;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_start"))
|
|
return;
|
|
|
|
cinfo = info->card;
|
|
channel = info->line - cinfo->first_line;
|
|
index = cinfo->bus_index;
|
|
if (!IS_CYC_Z(*cinfo)) {
|
|
chip = channel >> 2;
|
|
channel &= 0x03;
|
|
base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
|
|
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
|
|
cy_writeb(base_addr + (CySRER << index),
|
|
readb(base_addr + (CySRER << index)) | CyTxRdy);
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
}
|
|
} /* cy_start */
|
|
|
|
static void cy_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int channel, retval;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
|
|
return;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
|
|
buffers as well */
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
tty_wakeup(tty);
|
|
} /* cy_flush_buffer */
|
|
|
|
/*
|
|
* cy_hangup() --- called by tty_hangup() when a hangup is signaled.
|
|
*/
|
|
static void cy_hangup(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_hangup"))
|
|
return;
|
|
|
|
cy_flush_buffer(tty);
|
|
shutdown(info);
|
|
info->count = 0;
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
|
|
current->pid);
|
|
#endif
|
|
info->tty = NULL;
|
|
info->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
wake_up_interruptible(&info->open_wait);
|
|
} /* cy_hangup */
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------
|
|
* cy_init() and friends
|
|
*
|
|
* cy_init() is called at boot-time to initialize the serial driver.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
|
|
static int __devinit cy_init_card(struct cyclades_card *cinfo)
|
|
{
|
|
struct cyclades_port *info;
|
|
u32 uninitialized_var(mailbox);
|
|
unsigned int nports, port;
|
|
unsigned short chip_number;
|
|
int uninitialized_var(index);
|
|
|
|
spin_lock_init(&cinfo->card_lock);
|
|
|
|
if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
|
|
mailbox = readl(&((struct RUNTIME_9060 __iomem *)
|
|
cinfo->ctl_addr)->mail_box_0);
|
|
nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
|
|
cinfo->intr_enabled = 0;
|
|
cinfo->nports = 0; /* Will be correctly set later, after
|
|
Z FW is loaded */
|
|
} else {
|
|
index = cinfo->bus_index;
|
|
nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
|
|
}
|
|
|
|
cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
|
|
if (cinfo->ports == NULL) {
|
|
printk(KERN_ERR "Cyclades: cannot allocate ports\n");
|
|
cinfo->nports = 0;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (port = cinfo->first_line; port < cinfo->first_line + nports;
|
|
port++) {
|
|
info = &cinfo->ports[port - cinfo->first_line];
|
|
info->magic = CYCLADES_MAGIC;
|
|
info->card = cinfo;
|
|
info->line = port;
|
|
info->flags = STD_COM_FLAGS;
|
|
info->closing_wait = CLOSING_WAIT_DELAY;
|
|
info->close_delay = 5 * HZ / 10;
|
|
|
|
init_waitqueue_head(&info->open_wait);
|
|
init_waitqueue_head(&info->close_wait);
|
|
init_completion(&info->shutdown_wait);
|
|
init_waitqueue_head(&info->delta_msr_wait);
|
|
|
|
if (IS_CYC_Z(*cinfo)) {
|
|
info->type = PORT_STARTECH;
|
|
if (mailbox == ZO_V1)
|
|
info->xmit_fifo_size = CYZ_FIFO_SIZE;
|
|
else
|
|
info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
|
|
#ifdef CONFIG_CYZ_INTR
|
|
setup_timer(&cyz_rx_full_timer[port],
|
|
cyz_rx_restart, (unsigned long)info);
|
|
#endif
|
|
} else {
|
|
info->type = PORT_CIRRUS;
|
|
info->xmit_fifo_size = CyMAX_CHAR_FIFO;
|
|
info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
|
|
info->cor2 = CyETC;
|
|
info->cor3 = 0x08; /* _very_ small rcv threshold */
|
|
|
|
chip_number = (port - cinfo->first_line) / 4;
|
|
if ((info->chip_rev = readb(cinfo->base_addr +
|
|
(cy_chip_offset[chip_number] <<
|
|
index) + (CyGFRCR << index))) >=
|
|
CD1400_REV_J) {
|
|
/* It is a CD1400 rev. J or later */
|
|
info->tbpr = baud_bpr_60[13]; /* Tx BPR */
|
|
info->tco = baud_co_60[13]; /* Tx CO */
|
|
info->rbpr = baud_bpr_60[13]; /* Rx BPR */
|
|
info->rco = baud_co_60[13]; /* Rx CO */
|
|
info->rtsdtr_inv = 1;
|
|
} else {
|
|
info->tbpr = baud_bpr_25[13]; /* Tx BPR */
|
|
info->tco = baud_co_25[13]; /* Tx CO */
|
|
info->rbpr = baud_bpr_25[13]; /* Rx BPR */
|
|
info->rco = baud_co_25[13]; /* Rx CO */
|
|
info->rtsdtr_inv = 0;
|
|
}
|
|
info->read_status_mask = CyTIMEOUT | CySPECHAR |
|
|
CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
|
|
}
|
|
|
|
}
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
|
|
mod_timer(&cyz_timerlist, jiffies + 1);
|
|
#ifdef CY_PCI_DEBUG
|
|
printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
|
|
#endif
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/* initialize chips on Cyclom-Y card -- return number of valid
|
|
chips (which is number of ports/4) */
|
|
static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
|
|
int index)
|
|
{
|
|
unsigned int chip_number;
|
|
void __iomem *base_addr;
|
|
|
|
cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
|
|
/* Cy_HwReset is 0x1400 */
|
|
cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
udelay(500L);
|
|
|
|
for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
|
|
base_addr =
|
|
true_base_addr + (cy_chip_offset[chip_number] << index);
|
|
mdelay(1);
|
|
if (readb(base_addr + (CyCCR << index)) != 0x00) {
|
|
/*************
|
|
printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
|
|
chip_number, (unsigned long)base_addr);
|
|
*************/
|
|
return chip_number;
|
|
}
|
|
|
|
cy_writeb(base_addr + (CyGFRCR << index), 0);
|
|
udelay(10L);
|
|
|
|
/* The Cyclom-16Y does not decode address bit 9 and therefore
|
|
cannot distinguish between references to chip 0 and a non-
|
|
existent chip 4. If the preceding clearing of the supposed
|
|
chip 4 GFRCR register appears at chip 0, there is no chip 4
|
|
and this must be a Cyclom-16Y, not a Cyclom-32Ye.
|
|
*/
|
|
if (chip_number == 4 && readb(true_base_addr +
|
|
(cy_chip_offset[0] << index) +
|
|
(CyGFRCR << index)) == 0) {
|
|
return chip_number;
|
|
}
|
|
|
|
cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
|
|
mdelay(1);
|
|
|
|
if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
|
|
/*
|
|
printk(" chip #%d at %#6lx is not responding ",
|
|
chip_number, (unsigned long)base_addr);
|
|
printk("(GFRCR stayed 0)\n",
|
|
*/
|
|
return chip_number;
|
|
}
|
|
if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
|
|
0x40) {
|
|
/*
|
|
printk(" chip #%d at %#6lx is not valid (GFRCR == "
|
|
"%#2x)\n",
|
|
chip_number, (unsigned long)base_addr,
|
|
base_addr[CyGFRCR<<index]);
|
|
*/
|
|
return chip_number;
|
|
}
|
|
cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
|
|
if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
|
|
/* It is a CD1400 rev. J or later */
|
|
/* Impossible to reach 5ms with this chip.
|
|
Changed to 2ms instead (f = 500 Hz). */
|
|
cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
|
|
} else {
|
|
/* f = 200 Hz */
|
|
cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
|
|
}
|
|
|
|
/*
|
|
printk(" chip #%d at %#6lx is rev 0x%2x\n",
|
|
chip_number, (unsigned long)base_addr,
|
|
readb(base_addr+(CyGFRCR<<index)));
|
|
*/
|
|
}
|
|
return chip_number;
|
|
} /* cyy_init_card */
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------
|
|
* cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
|
|
* sets global variables and return the number of ISA boards found.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
static int __init cy_detect_isa(void)
|
|
{
|
|
#ifdef CONFIG_ISA
|
|
unsigned short cy_isa_irq, nboard;
|
|
void __iomem *cy_isa_address;
|
|
unsigned short i, j, cy_isa_nchan;
|
|
#ifdef MODULE
|
|
int isparam = 0;
|
|
#endif
|
|
|
|
nboard = 0;
|
|
|
|
#ifdef MODULE
|
|
/* Check for module parameters */
|
|
for (i = 0; i < NR_CARDS; i++) {
|
|
if (maddr[i] || i) {
|
|
isparam = 1;
|
|
cy_isa_addresses[i] = maddr[i];
|
|
}
|
|
if (!maddr[i])
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
/* scan the address table probing for Cyclom-Y/ISA boards */
|
|
for (i = 0; i < NR_ISA_ADDRS; i++) {
|
|
unsigned int isa_address = cy_isa_addresses[i];
|
|
if (isa_address == 0x0000) {
|
|
return nboard;
|
|
}
|
|
|
|
/* probe for CD1400... */
|
|
cy_isa_address = ioremap(isa_address, CyISA_Ywin);
|
|
if (cy_isa_address == NULL) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
|
|
"address\n");
|
|
continue;
|
|
}
|
|
cy_isa_nchan = CyPORTS_PER_CHIP *
|
|
cyy_init_card(cy_isa_address, 0);
|
|
if (cy_isa_nchan == 0) {
|
|
iounmap(cy_isa_address);
|
|
continue;
|
|
}
|
|
#ifdef MODULE
|
|
if (isparam && irq[i])
|
|
cy_isa_irq = irq[i];
|
|
else
|
|
#endif
|
|
/* find out the board's irq by probing */
|
|
cy_isa_irq = detect_isa_irq(cy_isa_address);
|
|
if (cy_isa_irq == 0) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
|
|
"IRQ could not be detected.\n",
|
|
(unsigned long)cy_isa_address);
|
|
iounmap(cy_isa_address);
|
|
continue;
|
|
}
|
|
|
|
if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
|
|
"more channels are available. Change NR_PORTS "
|
|
"in cyclades.c and recompile kernel.\n",
|
|
(unsigned long)cy_isa_address);
|
|
iounmap(cy_isa_address);
|
|
return nboard;
|
|
}
|
|
/* fill the next cy_card structure available */
|
|
for (j = 0; j < NR_CARDS; j++) {
|
|
if (cy_card[j].base_addr == NULL)
|
|
break;
|
|
}
|
|
if (j == NR_CARDS) { /* no more cy_cards available */
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
|
|
"more cards can be used. Change NR_CARDS in "
|
|
"cyclades.c and recompile kernel.\n",
|
|
(unsigned long)cy_isa_address);
|
|
iounmap(cy_isa_address);
|
|
return nboard;
|
|
}
|
|
|
|
/* allocate IRQ */
|
|
if (request_irq(cy_isa_irq, cyy_interrupt,
|
|
IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
|
|
"could not allocate IRQ#%d.\n",
|
|
(unsigned long)cy_isa_address, cy_isa_irq);
|
|
iounmap(cy_isa_address);
|
|
return nboard;
|
|
}
|
|
|
|
/* set cy_card */
|
|
cy_card[j].base_addr = cy_isa_address;
|
|
cy_card[j].ctl_addr = NULL;
|
|
cy_card[j].irq = (int)cy_isa_irq;
|
|
cy_card[j].bus_index = 0;
|
|
cy_card[j].first_line = cy_next_channel;
|
|
cy_card[j].num_chips = cy_isa_nchan / 4;
|
|
if (cy_init_card(&cy_card[j])) {
|
|
cy_card[j].base_addr = NULL;
|
|
free_irq(cy_isa_irq, &cy_card[j]);
|
|
iounmap(cy_isa_address);
|
|
continue;
|
|
}
|
|
nboard++;
|
|
|
|
printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
|
|
"%d channels starting from port %d\n",
|
|
j + 1, (unsigned long)cy_isa_address,
|
|
(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
|
|
cy_isa_irq, cy_isa_nchan, cy_next_channel);
|
|
|
|
for (j = cy_next_channel;
|
|
j < cy_next_channel + cy_isa_nchan; j++)
|
|
tty_register_device(cy_serial_driver, j, NULL);
|
|
cy_next_channel += cy_isa_nchan;
|
|
}
|
|
return nboard;
|
|
#else
|
|
return 0;
|
|
#endif /* CONFIG_ISA */
|
|
} /* cy_detect_isa */
|
|
|
|
#ifdef CONFIG_PCI
|
|
static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
|
|
{
|
|
unsigned int a;
|
|
|
|
for (a = 0; a < size && *str; a++, str++)
|
|
if (*str & 0x80)
|
|
return -EINVAL;
|
|
|
|
for (; a < size; a++, str++)
|
|
if (*str)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
|
|
unsigned int size)
|
|
{
|
|
for (; size > 0; size--) {
|
|
cy_writel(fpga, *data++);
|
|
udelay(10);
|
|
}
|
|
}
|
|
|
|
static void __devinit plx_init(struct pci_dev *pdev, int irq,
|
|
struct RUNTIME_9060 __iomem *addr)
|
|
{
|
|
/* Reset PLX */
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
|
|
udelay(100L);
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
|
|
|
|
/* Reload Config. Registers from EEPROM */
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
|
|
udelay(100L);
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
|
|
|
|
/* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
|
|
* the IRQ is lost and, thus, we have to re-write it to the PCI config.
|
|
* registers. This will remain here until we find a permanent fix.
|
|
*/
|
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
|
|
}
|
|
|
|
static int __devinit __cyz_load_fw(const struct firmware *fw,
|
|
const char *name, const u32 mailbox, void __iomem *base,
|
|
void __iomem *fpga)
|
|
{
|
|
void *ptr = fw->data;
|
|
struct zfile_header *h = ptr;
|
|
struct zfile_config *c, *cs;
|
|
struct zfile_block *b, *bs;
|
|
unsigned int a, tmp, len = fw->size;
|
|
#define BAD_FW KERN_ERR "Bad firmware: "
|
|
if (len < sizeof(*h)) {
|
|
printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
|
|
return -EINVAL;
|
|
}
|
|
|
|
cs = ptr + h->config_offset;
|
|
bs = ptr + h->block_offset;
|
|
|
|
if ((void *)(cs + h->n_config) > ptr + len ||
|
|
(void *)(bs + h->n_blocks) > ptr + len) {
|
|
printk(BAD_FW "too short");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cyc_isfwstr(h->name, sizeof(h->name)) ||
|
|
cyc_isfwstr(h->date, sizeof(h->date))) {
|
|
printk(BAD_FW "bad formatted header string\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (strncmp(name, h->name, sizeof(h->name))) {
|
|
printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
tmp = 0;
|
|
for (c = cs; c < cs + h->n_config; c++) {
|
|
for (a = 0; a < c->n_blocks; a++)
|
|
if (c->block_list[a] > h->n_blocks) {
|
|
printk(BAD_FW "bad block ref number in cfgs\n");
|
|
return -EINVAL;
|
|
}
|
|
if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
|
|
tmp++;
|
|
}
|
|
if (!tmp) {
|
|
printk(BAD_FW "nothing appropriate\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (b = bs; b < bs + h->n_blocks; b++)
|
|
if (b->file_offset + b->size > len) {
|
|
printk(BAD_FW "bad block data offset\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* everything is OK, let's seek'n'load it */
|
|
for (c = cs; c < cs + h->n_config; c++)
|
|
if (c->mailbox == mailbox && c->function == 0)
|
|
break;
|
|
|
|
for (a = 0; a < c->n_blocks; a++) {
|
|
b = &bs[c->block_list[a]];
|
|
if (b->type == ZBLOCK_FPGA) {
|
|
if (fpga != NULL)
|
|
cyz_fpga_copy(fpga, ptr + b->file_offset,
|
|
b->size);
|
|
} else {
|
|
if (base != NULL)
|
|
memcpy_toio(base + b->ram_offset,
|
|
ptr + b->file_offset, b->size);
|
|
}
|
|
}
|
|
#undef BAD_FW
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
|
|
struct RUNTIME_9060 __iomem *ctl_addr, int irq)
|
|
{
|
|
const struct firmware *fw;
|
|
struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
|
|
struct CUSTOM_REG __iomem *cust = base_addr;
|
|
struct ZFW_CTRL __iomem *pt_zfwctrl;
|
|
void __iomem *tmp;
|
|
u32 mailbox, status;
|
|
unsigned int i;
|
|
int retval;
|
|
|
|
retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "can't get firmware\n");
|
|
goto err;
|
|
}
|
|
|
|
/* Check whether the firmware is already loaded and running. If
|
|
positive, skip this board */
|
|
if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
|
|
u32 cntval = readl(base_addr + 0x190);
|
|
|
|
udelay(100);
|
|
if (cntval != readl(base_addr + 0x190)) {
|
|
/* FW counter is working, FW is running */
|
|
dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
|
|
"Skipping board.\n");
|
|
retval = 0;
|
|
goto err_rel;
|
|
}
|
|
}
|
|
|
|
/* start boot */
|
|
cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
|
|
~0x00030800UL);
|
|
|
|
mailbox = readl(&ctl_addr->mail_box_0);
|
|
|
|
if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
|
|
/* stops CPU and set window to beginning of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
cy_writel(&cust->cpu_stop, 0);
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
udelay(100);
|
|
}
|
|
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
if (mailbox != 0) {
|
|
/* load FPGA */
|
|
retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
|
|
base_addr);
|
|
if (retval)
|
|
goto err_rel;
|
|
if (!Z_FPGA_LOADED(ctl_addr)) {
|
|
dev_err(&pdev->dev, "fw upload successful, but fw is "
|
|
"not loaded\n");
|
|
goto err_rel;
|
|
}
|
|
}
|
|
|
|
/* stops CPU and set window to beginning of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
cy_writel(&cust->cpu_stop, 0);
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
udelay(100);
|
|
|
|
/* clear memory */
|
|
for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
|
|
cy_writeb(tmp, 255);
|
|
if (mailbox != 0) {
|
|
/* set window to last 512K of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
|
|
//sleep(1);
|
|
for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
|
|
cy_writeb(tmp, 255);
|
|
/* set window to beginning of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
//sleep(1);
|
|
}
|
|
|
|
retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
|
|
release_firmware(fw);
|
|
if (retval)
|
|
goto err;
|
|
|
|
/* finish boot and start boards */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
cy_writel(&cust->cpu_start, 0);
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
i = 0;
|
|
while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
|
|
msleep(100);
|
|
if (status != ZFIRM_ID) {
|
|
if (status == ZFIRM_HLT) {
|
|
dev_err(&pdev->dev, "you need an external power supply "
|
|
"for this number of ports. Firmware halted and "
|
|
"board reset.\n");
|
|
retval = -EIO;
|
|
goto err;
|
|
}
|
|
dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
|
|
"some more time\n", status);
|
|
while ((status = readl(&fid->signature)) != ZFIRM_ID &&
|
|
i++ < 200)
|
|
msleep(100);
|
|
if (status != ZFIRM_ID) {
|
|
dev_err(&pdev->dev, "Board not started in 20 seconds! "
|
|
"Giving up. (fid->signature = 0x%x)\n",
|
|
status);
|
|
dev_info(&pdev->dev, "*** Warning ***: if you are "
|
|
"upgrading the FW, please power cycle the "
|
|
"system before loading the new FW to the "
|
|
"Cyclades-Z.\n");
|
|
|
|
if (Z_FPGA_LOADED(ctl_addr))
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
retval = -EIO;
|
|
goto err;
|
|
}
|
|
dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
|
|
i / 10);
|
|
}
|
|
pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
|
|
|
|
dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
|
|
base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
|
|
base_addr + readl(&fid->zfwctrl_addr));
|
|
|
|
dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
|
|
readl(&pt_zfwctrl->board_ctrl.fw_version),
|
|
readl(&pt_zfwctrl->board_ctrl.n_channel));
|
|
|
|
if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
|
|
dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
|
|
"check the connection between the Z host card and the "
|
|
"serial expanders.\n");
|
|
|
|
if (Z_FPGA_LOADED(ctl_addr))
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
dev_info(&pdev->dev, "Null number of ports detected. Board "
|
|
"reset.\n");
|
|
retval = 0;
|
|
goto err;
|
|
}
|
|
|
|
cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
|
|
cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
|
|
|
|
/*
|
|
Early firmware failed to start looking for commands.
|
|
This enables firmware interrupts for those commands.
|
|
*/
|
|
cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
|
|
(1 << 17));
|
|
cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
|
|
0x00030800UL);
|
|
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
return 0;
|
|
err_rel:
|
|
release_firmware(fw);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
static int __devinit cy_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
void __iomem *addr0 = NULL, *addr2 = NULL;
|
|
char *card_name = NULL;
|
|
u32 mailbox;
|
|
unsigned int device_id, nchan = 0, card_no, i;
|
|
unsigned char plx_ver;
|
|
int retval, irq;
|
|
|
|
retval = pci_enable_device(pdev);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "cannot enable device\n");
|
|
goto err;
|
|
}
|
|
|
|
/* read PCI configuration area */
|
|
irq = pdev->irq;
|
|
device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
|
|
|
|
#if defined(__alpha__)
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
|
|
dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
|
|
"addresses on Alpha systems.\n");
|
|
retval = -EIO;
|
|
goto err_dis;
|
|
}
|
|
#endif
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
|
|
dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
|
|
"addresses\n");
|
|
retval = -EIO;
|
|
goto err_dis;
|
|
}
|
|
|
|
if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
|
|
dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
|
|
"it...\n");
|
|
pdev->resource[2].flags &= ~IORESOURCE_IO;
|
|
}
|
|
|
|
retval = pci_request_regions(pdev, "cyclades");
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "failed to reserve resources\n");
|
|
goto err_dis;
|
|
}
|
|
|
|
retval = -EIO;
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
|
|
device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
|
|
card_name = "Cyclom-Y";
|
|
|
|
addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
|
|
if (addr0 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap ctl region\n");
|
|
goto err_reg;
|
|
}
|
|
addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
|
|
if (addr2 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap base region\n");
|
|
goto err_unmap;
|
|
}
|
|
|
|
nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
|
|
if (nchan == 0) {
|
|
dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
|
|
"Serial-Modules\n");
|
|
return -EIO;
|
|
}
|
|
} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
|
|
struct RUNTIME_9060 __iomem *ctl_addr;
|
|
|
|
ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
|
|
if (addr0 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap ctl region\n");
|
|
goto err_reg;
|
|
}
|
|
|
|
/* Disable interrupts on the PLX before resetting it */
|
|
cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
|
|
|
|
plx_init(pdev, irq, addr0);
|
|
|
|
mailbox = (u32)readl(&ctl_addr->mail_box_0);
|
|
|
|
addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
|
|
CyPCI_Ze_win : CyPCI_Zwin);
|
|
if (addr2 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap base region\n");
|
|
goto err_unmap;
|
|
}
|
|
|
|
if (mailbox == ZE_V1) {
|
|
card_name = "Cyclades-Ze";
|
|
|
|
readl(&ctl_addr->mail_box_0);
|
|
nchan = ZE_V1_NPORTS;
|
|
} else {
|
|
card_name = "Cyclades-8Zo";
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
if (mailbox == ZO_V1) {
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
|
|
"id %lx, ver %lx\n", (ulong)(0xff &
|
|
readl(&((struct CUSTOM_REG *)addr2)->
|
|
fpga_id)), (ulong)(0xff &
|
|
readl(&((struct CUSTOM_REG *)addr2)->
|
|
fpga_version)));
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
} else {
|
|
dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
|
|
"Cyclades-Z board. FPGA not loaded\n");
|
|
}
|
|
#endif
|
|
/* The following clears the firmware id word. This
|
|
ensures that the driver will not attempt to talk to
|
|
the board until it has been properly initialized.
|
|
*/
|
|
if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
|
|
cy_writel(addr2 + ID_ADDRESS, 0L);
|
|
|
|
retval = cyz_load_fw(pdev, addr2, addr0, irq);
|
|
if (retval)
|
|
goto err_unmap;
|
|
/* This must be a Cyclades-8Zo/PCI. The extendable
|
|
version will have a different device_id and will
|
|
be allocated its maximum number of ports. */
|
|
nchan = 8;
|
|
}
|
|
}
|
|
|
|
if ((cy_next_channel + nchan) > NR_PORTS) {
|
|
dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
|
|
"channels are available. Change NR_PORTS in "
|
|
"cyclades.c and recompile kernel.\n");
|
|
goto err_unmap;
|
|
}
|
|
/* fill the next cy_card structure available */
|
|
for (card_no = 0; card_no < NR_CARDS; card_no++) {
|
|
if (cy_card[card_no].base_addr == NULL)
|
|
break;
|
|
}
|
|
if (card_no == NR_CARDS) { /* no more cy_cards available */
|
|
dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
|
|
"more cards can be used. Change NR_CARDS in "
|
|
"cyclades.c and recompile kernel.\n");
|
|
goto err_unmap;
|
|
}
|
|
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
|
|
device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
|
|
/* allocate IRQ */
|
|
retval = request_irq(irq, cyy_interrupt,
|
|
IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "could not allocate IRQ\n");
|
|
goto err_unmap;
|
|
}
|
|
cy_card[card_no].num_chips = nchan / 4;
|
|
} else {
|
|
#ifdef CONFIG_CYZ_INTR
|
|
/* allocate IRQ only if board has an IRQ */
|
|
if (irq != 0 && irq != 255) {
|
|
retval = request_irq(irq, cyz_interrupt,
|
|
IRQF_SHARED, "Cyclades-Z",
|
|
&cy_card[card_no]);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "could not allocate IRQ\n");
|
|
goto err_unmap;
|
|
}
|
|
}
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
cy_card[card_no].num_chips = (unsigned int)-1;
|
|
}
|
|
|
|
/* set cy_card */
|
|
cy_card[card_no].base_addr = addr2;
|
|
cy_card[card_no].ctl_addr = addr0;
|
|
cy_card[card_no].irq = irq;
|
|
cy_card[card_no].bus_index = 1;
|
|
cy_card[card_no].first_line = cy_next_channel;
|
|
retval = cy_init_card(&cy_card[card_no]);
|
|
if (retval)
|
|
goto err_null;
|
|
|
|
pci_set_drvdata(pdev, &cy_card[card_no]);
|
|
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
|
|
device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
|
|
/* enable interrupts in the PCI interface */
|
|
plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
|
|
switch (plx_ver) {
|
|
case PLX_9050:
|
|
|
|
cy_writeb(addr0 + 0x4c, 0x43);
|
|
break;
|
|
|
|
case PLX_9060:
|
|
case PLX_9080:
|
|
default: /* Old boards, use PLX_9060 */
|
|
plx_init(pdev, irq, addr0);
|
|
cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
|
|
break;
|
|
}
|
|
}
|
|
|
|
dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
|
|
"port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
|
|
for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
|
|
tty_register_device(cy_serial_driver, i, &pdev->dev);
|
|
cy_next_channel += nchan;
|
|
|
|
return 0;
|
|
err_null:
|
|
cy_card[card_no].base_addr = NULL;
|
|
free_irq(irq, &cy_card[card_no]);
|
|
err_unmap:
|
|
pci_iounmap(pdev, addr0);
|
|
if (addr2)
|
|
pci_iounmap(pdev, addr2);
|
|
err_reg:
|
|
pci_release_regions(pdev);
|
|
err_dis:
|
|
pci_disable_device(pdev);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
static void __devexit cy_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct cyclades_card *cinfo = pci_get_drvdata(pdev);
|
|
unsigned int i;
|
|
|
|
/* non-Z with old PLX */
|
|
if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
|
|
PLX_9050)
|
|
cy_writeb(cinfo->ctl_addr + 0x4c, 0);
|
|
else
|
|
#ifndef CONFIG_CYZ_INTR
|
|
if (!IS_CYC_Z(*cinfo))
|
|
#endif
|
|
cy_writew(cinfo->ctl_addr + 0x68,
|
|
readw(cinfo->ctl_addr + 0x68) & ~0x0900);
|
|
|
|
pci_iounmap(pdev, cinfo->base_addr);
|
|
if (cinfo->ctl_addr)
|
|
pci_iounmap(pdev, cinfo->ctl_addr);
|
|
if (cinfo->irq
|
|
#ifndef CONFIG_CYZ_INTR
|
|
&& !IS_CYC_Z(*cinfo)
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
)
|
|
free_irq(cinfo->irq, cinfo);
|
|
pci_release_regions(pdev);
|
|
|
|
cinfo->base_addr = NULL;
|
|
for (i = cinfo->first_line; i < cinfo->first_line +
|
|
cinfo->nports; i++)
|
|
tty_unregister_device(cy_serial_driver, i);
|
|
cinfo->nports = 0;
|
|
kfree(cinfo->ports);
|
|
}
|
|
|
|
static struct pci_driver cy_pci_driver = {
|
|
.name = "cyclades",
|
|
.id_table = cy_pci_dev_id,
|
|
.probe = cy_pci_probe,
|
|
.remove = __devexit_p(cy_pci_remove)
|
|
};
|
|
#endif
|
|
|
|
static int
|
|
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
|
|
int *eof, void *data)
|
|
{
|
|
struct cyclades_port *info;
|
|
unsigned int i, j;
|
|
int len = 0;
|
|
off_t begin = 0;
|
|
off_t pos = 0;
|
|
int size;
|
|
__u32 cur_jifs = jiffies;
|
|
|
|
size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
|
|
"IdleIn Overruns Ldisc\n");
|
|
|
|
pos += size;
|
|
len += size;
|
|
|
|
/* Output one line for each known port */
|
|
for (i = 0; i < NR_CARDS; i++)
|
|
for (j = 0; j < cy_card[i].nports; j++) {
|
|
info = &cy_card[i].ports[j];
|
|
|
|
if (info->count)
|
|
size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
|
|
"%10lu %8lu %9lu %6ld\n", info->line,
|
|
(cur_jifs - info->idle_stats.in_use) /
|
|
HZ, info->idle_stats.xmit_bytes,
|
|
(cur_jifs - info->idle_stats.xmit_idle)/
|
|
HZ, info->idle_stats.recv_bytes,
|
|
(cur_jifs - info->idle_stats.recv_idle)/
|
|
HZ, info->idle_stats.overruns,
|
|
(long)info->tty->ldisc.num);
|
|
else
|
|
size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
|
|
"%10lu %8lu %9lu %6ld\n",
|
|
info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
|
|
len += size;
|
|
pos = begin + len;
|
|
|
|
if (pos < offset) {
|
|
len = 0;
|
|
begin = pos;
|
|
}
|
|
if (pos > offset + length)
|
|
goto done;
|
|
}
|
|
*eof = 1;
|
|
done:
|
|
*start = buf + (offset - begin); /* Start of wanted data */
|
|
len -= (offset - begin); /* Start slop */
|
|
if (len > length)
|
|
len = length; /* Ending slop */
|
|
if (len < 0)
|
|
len = 0;
|
|
return len;
|
|
}
|
|
|
|
/* The serial driver boot-time initialization code!
|
|
Hardware I/O ports are mapped to character special devices on a
|
|
first found, first allocated manner. That is, this code searches
|
|
for Cyclom cards in the system. As each is found, it is probed
|
|
to discover how many chips (and thus how many ports) are present.
|
|
These ports are mapped to the tty ports 32 and upward in monotonic
|
|
fashion. If an 8-port card is replaced with a 16-port card, the
|
|
port mapping on a following card will shift.
|
|
|
|
This approach is different from what is used in the other serial
|
|
device driver because the Cyclom is more properly a multiplexer,
|
|
not just an aggregation of serial ports on one card.
|
|
|
|
If there are more cards with more ports than have been
|
|
statically allocated above, a warning is printed and the
|
|
extra ports are ignored.
|
|
*/
|
|
|
|
static const struct tty_operations cy_ops = {
|
|
.open = cy_open,
|
|
.close = cy_close,
|
|
.write = cy_write,
|
|
.put_char = cy_put_char,
|
|
.flush_chars = cy_flush_chars,
|
|
.write_room = cy_write_room,
|
|
.chars_in_buffer = cy_chars_in_buffer,
|
|
.flush_buffer = cy_flush_buffer,
|
|
.ioctl = cy_ioctl,
|
|
.throttle = cy_throttle,
|
|
.unthrottle = cy_unthrottle,
|
|
.set_termios = cy_set_termios,
|
|
.stop = cy_stop,
|
|
.start = cy_start,
|
|
.hangup = cy_hangup,
|
|
.break_ctl = cy_break,
|
|
.wait_until_sent = cy_wait_until_sent,
|
|
.read_proc = cyclades_get_proc_info,
|
|
.tiocmget = cy_tiocmget,
|
|
.tiocmset = cy_tiocmset,
|
|
};
|
|
|
|
static int __init cy_init(void)
|
|
{
|
|
unsigned int nboards;
|
|
int retval = -ENOMEM;
|
|
|
|
cy_serial_driver = alloc_tty_driver(NR_PORTS);
|
|
if (!cy_serial_driver)
|
|
goto err;
|
|
|
|
printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
|
|
__DATE__, __TIME__);
|
|
|
|
/* Initialize the tty_driver structure */
|
|
|
|
cy_serial_driver->owner = THIS_MODULE;
|
|
cy_serial_driver->driver_name = "cyclades";
|
|
cy_serial_driver->name = "ttyC";
|
|
cy_serial_driver->major = CYCLADES_MAJOR;
|
|
cy_serial_driver->minor_start = 0;
|
|
cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
cy_serial_driver->init_termios = tty_std_termios;
|
|
cy_serial_driver->init_termios.c_cflag =
|
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
|
|
tty_set_operations(cy_serial_driver, &cy_ops);
|
|
|
|
retval = tty_register_driver(cy_serial_driver);
|
|
if (retval) {
|
|
printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
|
|
goto err_frtty;
|
|
}
|
|
|
|
/* the code below is responsible to find the boards. Each different
|
|
type of board has its own detection routine. If a board is found,
|
|
the next cy_card structure available is set by the detection
|
|
routine. These functions are responsible for checking the
|
|
availability of cy_card and cy_port data structures and updating
|
|
the cy_next_channel. */
|
|
|
|
/* look for isa boards */
|
|
nboards = cy_detect_isa();
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* look for pci boards */
|
|
retval = pci_register_driver(&cy_pci_driver);
|
|
if (retval && !nboards) {
|
|
tty_unregister_driver(cy_serial_driver);
|
|
goto err_frtty;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
err_frtty:
|
|
put_tty_driver(cy_serial_driver);
|
|
err:
|
|
return retval;
|
|
} /* cy_init */
|
|
|
|
static void __exit cy_cleanup_module(void)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned int i, e1;
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
del_timer_sync(&cyz_timerlist);
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
if ((e1 = tty_unregister_driver(cy_serial_driver)))
|
|
printk(KERN_ERR "failed to unregister Cyclades serial "
|
|
"driver(%d)\n", e1);
|
|
|
|
#ifdef CONFIG_PCI
|
|
pci_unregister_driver(&cy_pci_driver);
|
|
#endif
|
|
|
|
for (i = 0; i < NR_CARDS; i++) {
|
|
card = &cy_card[i];
|
|
if (card->base_addr) {
|
|
/* clear interrupt */
|
|
cy_writeb(card->base_addr + Cy_ClrIntr, 0);
|
|
iounmap(card->base_addr);
|
|
if (card->ctl_addr)
|
|
iounmap(card->ctl_addr);
|
|
if (card->irq
|
|
#ifndef CONFIG_CYZ_INTR
|
|
&& !IS_CYC_Z(*card)
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
)
|
|
free_irq(card->irq, card);
|
|
for (e1 = card->first_line; e1 < card->first_line +
|
|
card->nports; e1++)
|
|
tty_unregister_device(cy_serial_driver, e1);
|
|
kfree(card->ports);
|
|
}
|
|
}
|
|
|
|
put_tty_driver(cy_serial_driver);
|
|
} /* cy_cleanup_module */
|
|
|
|
module_init(cy_init);
|
|
module_exit(cy_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(CY_VERSION);
|