mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 09:43:59 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
3790 lines
103 KiB
C
3790 lines
103 KiB
C
/*
|
|
|
|
|
|
Copyright (C) 1996 Digi International.
|
|
|
|
For technical support please email digiLinux@dgii.com or
|
|
call Digi tech support at (612) 912-3456
|
|
|
|
Much of this design and code came from epca.c which was
|
|
copyright (C) 1994, 1995 Troy De Jongh, and subsquently
|
|
modified by David Nugent, Christoph Lameter, Mike McLagan.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
--------------------------------------------------------------------------- */
|
|
/* See README.epca for change history --DAT*/
|
|
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/tty_flip.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/io.h>
|
|
|
|
#ifdef CONFIG_PCI
|
|
#define ENABLE_PCI
|
|
#endif /* CONFIG_PCI */
|
|
|
|
#define putUser(arg1, arg2) put_user(arg1, (unsigned long __user *)arg2)
|
|
#define getUser(arg1, arg2) get_user(arg1, (unsigned __user *)arg2)
|
|
|
|
#ifdef ENABLE_PCI
|
|
#include <linux/pci.h>
|
|
#include "digiPCI.h"
|
|
#endif /* ENABLE_PCI */
|
|
|
|
#include "digi1.h"
|
|
#include "digiFep1.h"
|
|
#include "epca.h"
|
|
#include "epcaconfig.h"
|
|
|
|
#if BITS_PER_LONG != 32
|
|
# error FIXME: this driver only works on 32-bit platforms
|
|
#endif
|
|
|
|
/* ---------------------- Begin defines ------------------------ */
|
|
|
|
#define VERSION "1.3.0.1-LK"
|
|
|
|
/* This major needs to be submitted to Linux to join the majors list */
|
|
|
|
#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */
|
|
|
|
|
|
#define MAXCARDS 7
|
|
#define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg)
|
|
|
|
#define PFX "epca: "
|
|
|
|
/* ----------------- Begin global definitions ------------------- */
|
|
|
|
static char mesg[100];
|
|
static int nbdevs, num_cards, liloconfig;
|
|
static int digi_poller_inhibited = 1 ;
|
|
|
|
static int setup_error_code;
|
|
static int invalid_lilo_config;
|
|
|
|
/* -----------------------------------------------------------------------
|
|
MAXBOARDS is typically 12, but ISA and EISA cards are restricted to
|
|
7 below.
|
|
--------------------------------------------------------------------------*/
|
|
static struct board_info boards[MAXBOARDS];
|
|
|
|
|
|
/* ------------- Begin structures used for driver registeration ---------- */
|
|
|
|
static struct tty_driver *pc_driver;
|
|
static struct tty_driver *pc_info;
|
|
|
|
/* ------------------ Begin Digi specific structures -------------------- */
|
|
|
|
/* ------------------------------------------------------------------------
|
|
digi_channels represents an array of structures that keep track of
|
|
each channel of the Digi product. Information such as transmit and
|
|
receive pointers, termio data, and signal definitions (DTR, CTS, etc ...)
|
|
are stored here. This structure is NOT used to overlay the cards
|
|
physical channel structure.
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct channel digi_channels[MAX_ALLOC];
|
|
|
|
/* ------------------------------------------------------------------------
|
|
card_ptr is an array used to hold the address of the
|
|
first channel structure of each card. This array will hold
|
|
the addresses of various channels located in digi_channels.
|
|
-------------------------------------------------------------------------- */
|
|
static struct channel *card_ptr[MAXCARDS];
|
|
|
|
static struct timer_list epca_timer;
|
|
|
|
/* ---------------------- Begin function prototypes --------------------- */
|
|
|
|
/* ----------------------------------------------------------------------
|
|
Begin generic memory functions. These functions will be alias
|
|
(point at) more specific functions dependent on the board being
|
|
configured.
|
|
----------------------------------------------------------------------- */
|
|
|
|
static inline void memwinon(struct board_info *b, unsigned int win);
|
|
static inline void memwinoff(struct board_info *b, unsigned int win);
|
|
static inline void globalwinon(struct channel *ch);
|
|
static inline void rxwinon(struct channel *ch);
|
|
static inline void txwinon(struct channel *ch);
|
|
static inline void memoff(struct channel *ch);
|
|
static inline void assertgwinon(struct channel *ch);
|
|
static inline void assertmemoff(struct channel *ch);
|
|
|
|
/* ---- Begin more 'specific' memory functions for cx_like products --- */
|
|
|
|
static inline void pcxem_memwinon(struct board_info *b, unsigned int win);
|
|
static inline void pcxem_memwinoff(struct board_info *b, unsigned int win);
|
|
static inline void pcxem_globalwinon(struct channel *ch);
|
|
static inline void pcxem_rxwinon(struct channel *ch);
|
|
static inline void pcxem_txwinon(struct channel *ch);
|
|
static inline void pcxem_memoff(struct channel *ch);
|
|
|
|
/* ------ Begin more 'specific' memory functions for the pcxe ------- */
|
|
|
|
static inline void pcxe_memwinon(struct board_info *b, unsigned int win);
|
|
static inline void pcxe_memwinoff(struct board_info *b, unsigned int win);
|
|
static inline void pcxe_globalwinon(struct channel *ch);
|
|
static inline void pcxe_rxwinon(struct channel *ch);
|
|
static inline void pcxe_txwinon(struct channel *ch);
|
|
static inline void pcxe_memoff(struct channel *ch);
|
|
|
|
/* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */
|
|
/* Note : pc64xe and pcxi share the same windowing routines */
|
|
|
|
static inline void pcxi_memwinon(struct board_info *b, unsigned int win);
|
|
static inline void pcxi_memwinoff(struct board_info *b, unsigned int win);
|
|
static inline void pcxi_globalwinon(struct channel *ch);
|
|
static inline void pcxi_rxwinon(struct channel *ch);
|
|
static inline void pcxi_txwinon(struct channel *ch);
|
|
static inline void pcxi_memoff(struct channel *ch);
|
|
|
|
/* - Begin 'specific' do nothing memory functions needed for some cards - */
|
|
|
|
static inline void dummy_memwinon(struct board_info *b, unsigned int win);
|
|
static inline void dummy_memwinoff(struct board_info *b, unsigned int win);
|
|
static inline void dummy_globalwinon(struct channel *ch);
|
|
static inline void dummy_rxwinon(struct channel *ch);
|
|
static inline void dummy_txwinon(struct channel *ch);
|
|
static inline void dummy_memoff(struct channel *ch);
|
|
static inline void dummy_assertgwinon(struct channel *ch);
|
|
static inline void dummy_assertmemoff(struct channel *ch);
|
|
|
|
/* ------------------- Begin declare functions ----------------------- */
|
|
|
|
static inline struct channel *verifyChannel(register struct tty_struct *);
|
|
static inline void pc_sched_event(struct channel *, int);
|
|
static void epca_error(int, char *);
|
|
static void pc_close(struct tty_struct *, struct file *);
|
|
static void shutdown(struct channel *);
|
|
static void pc_hangup(struct tty_struct *);
|
|
static void pc_put_char(struct tty_struct *, unsigned char);
|
|
static int pc_write_room(struct tty_struct *);
|
|
static int pc_chars_in_buffer(struct tty_struct *);
|
|
static void pc_flush_buffer(struct tty_struct *);
|
|
static void pc_flush_chars(struct tty_struct *);
|
|
static int block_til_ready(struct tty_struct *, struct file *,
|
|
struct channel *);
|
|
static int pc_open(struct tty_struct *, struct file *);
|
|
static void post_fep_init(unsigned int crd);
|
|
static void epcapoll(unsigned long);
|
|
static void doevent(int);
|
|
static void fepcmd(struct channel *, int, int, int, int, int);
|
|
static unsigned termios2digi_h(struct channel *ch, unsigned);
|
|
static unsigned termios2digi_i(struct channel *ch, unsigned);
|
|
static unsigned termios2digi_c(struct channel *ch, unsigned);
|
|
static void epcaparam(struct tty_struct *, struct channel *);
|
|
static void receive_data(struct channel *);
|
|
static int pc_ioctl(struct tty_struct *, struct file *,
|
|
unsigned int, unsigned long);
|
|
static int info_ioctl(struct tty_struct *, struct file *,
|
|
unsigned int, unsigned long);
|
|
static void pc_set_termios(struct tty_struct *, struct termios *);
|
|
static void do_softint(void *);
|
|
static void pc_stop(struct tty_struct *);
|
|
static void pc_start(struct tty_struct *);
|
|
static void pc_throttle(struct tty_struct * tty);
|
|
static void pc_unthrottle(struct tty_struct *tty);
|
|
static void digi_send_break(struct channel *ch, int msec);
|
|
static void setup_empty_event(struct tty_struct *tty, struct channel *ch);
|
|
void epca_setup(char *, int *);
|
|
void console_print(const char *);
|
|
|
|
static int get_termio(struct tty_struct *, struct termio __user *);
|
|
static int pc_write(struct tty_struct *, const unsigned char *, int);
|
|
int pc_init(void);
|
|
|
|
#ifdef ENABLE_PCI
|
|
static int init_PCI(void);
|
|
#endif /* ENABLE_PCI */
|
|
|
|
|
|
/* ------------------------------------------------------------------
|
|
Table of functions for each board to handle memory. Mantaining
|
|
parallelism is a *very* good idea here. The idea is for the
|
|
runtime code to blindly call these functions, not knowing/caring
|
|
about the underlying hardware. This stuff should contain no
|
|
conditionals; if more functionality is needed a different entry
|
|
should be established. These calls are the interface calls and
|
|
are the only functions that should be accessed. Anyone caught
|
|
making direct calls deserves what they get.
|
|
-------------------------------------------------------------------- */
|
|
|
|
static inline void memwinon(struct board_info *b, unsigned int win)
|
|
{
|
|
(b->memwinon)(b, win);
|
|
}
|
|
|
|
static inline void memwinoff(struct board_info *b, unsigned int win)
|
|
{
|
|
(b->memwinoff)(b, win);
|
|
}
|
|
|
|
static inline void globalwinon(struct channel *ch)
|
|
{
|
|
(ch->board->globalwinon)(ch);
|
|
}
|
|
|
|
static inline void rxwinon(struct channel *ch)
|
|
{
|
|
(ch->board->rxwinon)(ch);
|
|
}
|
|
|
|
static inline void txwinon(struct channel *ch)
|
|
{
|
|
(ch->board->txwinon)(ch);
|
|
}
|
|
|
|
static inline void memoff(struct channel *ch)
|
|
{
|
|
(ch->board->memoff)(ch);
|
|
}
|
|
static inline void assertgwinon(struct channel *ch)
|
|
{
|
|
(ch->board->assertgwinon)(ch);
|
|
}
|
|
|
|
static inline void assertmemoff(struct channel *ch)
|
|
{
|
|
(ch->board->assertmemoff)(ch);
|
|
}
|
|
|
|
/* ---------------------------------------------------------
|
|
PCXEM windowing is the same as that used in the PCXR
|
|
and CX series cards.
|
|
------------------------------------------------------------ */
|
|
|
|
static inline void pcxem_memwinon(struct board_info *b, unsigned int win)
|
|
{
|
|
outb_p(FEPWIN|win, (int)b->port + 1);
|
|
}
|
|
|
|
static inline void pcxem_memwinoff(struct board_info *b, unsigned int win)
|
|
{
|
|
outb_p(0, (int)b->port + 1);
|
|
}
|
|
|
|
static inline void pcxem_globalwinon(struct channel *ch)
|
|
{
|
|
outb_p( FEPWIN, (int)ch->board->port + 1);
|
|
}
|
|
|
|
static inline void pcxem_rxwinon(struct channel *ch)
|
|
{
|
|
outb_p(ch->rxwin, (int)ch->board->port + 1);
|
|
}
|
|
|
|
static inline void pcxem_txwinon(struct channel *ch)
|
|
{
|
|
outb_p(ch->txwin, (int)ch->board->port + 1);
|
|
}
|
|
|
|
static inline void pcxem_memoff(struct channel *ch)
|
|
{
|
|
outb_p(0, (int)ch->board->port + 1);
|
|
}
|
|
|
|
/* ----------------- Begin pcxe memory window stuff ------------------ */
|
|
|
|
static inline void pcxe_memwinon(struct board_info *b, unsigned int win)
|
|
{
|
|
outb_p(FEPWIN | win, (int)b->port + 1);
|
|
}
|
|
|
|
static inline void pcxe_memwinoff(struct board_info *b, unsigned int win)
|
|
{
|
|
outb_p(inb((int)b->port) & ~FEPMEM,
|
|
(int)b->port + 1);
|
|
outb_p(0, (int)b->port + 1);
|
|
}
|
|
|
|
static inline void pcxe_globalwinon(struct channel *ch)
|
|
{
|
|
outb_p( FEPWIN, (int)ch->board->port + 1);
|
|
}
|
|
|
|
static inline void pcxe_rxwinon(struct channel *ch)
|
|
{
|
|
outb_p(ch->rxwin, (int)ch->board->port + 1);
|
|
}
|
|
|
|
static inline void pcxe_txwinon(struct channel *ch)
|
|
{
|
|
outb_p(ch->txwin, (int)ch->board->port + 1);
|
|
}
|
|
|
|
static inline void pcxe_memoff(struct channel *ch)
|
|
{
|
|
outb_p(0, (int)ch->board->port);
|
|
outb_p(0, (int)ch->board->port + 1);
|
|
}
|
|
|
|
/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */
|
|
|
|
static inline void pcxi_memwinon(struct board_info *b, unsigned int win)
|
|
{
|
|
outb_p(inb((int)b->port) | FEPMEM, (int)b->port);
|
|
}
|
|
|
|
static inline void pcxi_memwinoff(struct board_info *b, unsigned int win)
|
|
{
|
|
outb_p(inb((int)b->port) & ~FEPMEM, (int)b->port);
|
|
}
|
|
|
|
static inline void pcxi_globalwinon(struct channel *ch)
|
|
{
|
|
outb_p(FEPMEM, (int)ch->board->port);
|
|
}
|
|
|
|
static inline void pcxi_rxwinon(struct channel *ch)
|
|
{
|
|
outb_p(FEPMEM, (int)ch->board->port);
|
|
}
|
|
|
|
static inline void pcxi_txwinon(struct channel *ch)
|
|
{
|
|
outb_p(FEPMEM, (int)ch->board->port);
|
|
}
|
|
|
|
static inline void pcxi_memoff(struct channel *ch)
|
|
{
|
|
outb_p(0, (int)ch->board->port);
|
|
}
|
|
|
|
static inline void pcxi_assertgwinon(struct channel *ch)
|
|
{
|
|
epcaassert(inb((int)ch->board->port) & FEPMEM, "Global memory off");
|
|
}
|
|
|
|
static inline void pcxi_assertmemoff(struct channel *ch)
|
|
{
|
|
epcaassert(!(inb((int)ch->board->port) & FEPMEM), "Memory on");
|
|
}
|
|
|
|
|
|
/* ----------------------------------------------------------------------
|
|
Not all of the cards need specific memory windowing routines. Some
|
|
cards (Such as PCI) needs no windowing routines at all. We provide
|
|
these do nothing routines so that the same code base can be used.
|
|
The driver will ALWAYS call a windowing routine if it thinks it needs
|
|
to; regardless of the card. However, dependent on the card the routine
|
|
may or may not do anything.
|
|
---------------------------------------------------------------------------*/
|
|
|
|
static inline void dummy_memwinon(struct board_info *b, unsigned int win)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_memwinoff(struct board_info *b, unsigned int win)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_globalwinon(struct channel *ch)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_rxwinon(struct channel *ch)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_txwinon(struct channel *ch)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_memoff(struct channel *ch)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_assertgwinon(struct channel *ch)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_assertmemoff(struct channel *ch)
|
|
{
|
|
}
|
|
|
|
/* ----------------- Begin verifyChannel function ----------------------- */
|
|
static inline struct channel *verifyChannel(register struct tty_struct *tty)
|
|
{ /* Begin verifyChannel */
|
|
|
|
/* --------------------------------------------------------------------
|
|
This routine basically provides a sanity check. It insures that
|
|
the channel returned is within the proper range of addresses as
|
|
well as properly initialized. If some bogus info gets passed in
|
|
through tty->driver_data this should catch it.
|
|
--------------------------------------------------------------------- */
|
|
|
|
if (tty)
|
|
{ /* Begin if tty */
|
|
|
|
register struct channel *ch = (struct channel *)tty->driver_data;
|
|
|
|
if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs]))
|
|
{
|
|
if (ch->magic == EPCA_MAGIC)
|
|
return ch;
|
|
}
|
|
|
|
} /* End if tty */
|
|
|
|
/* Else return a NULL for invalid */
|
|
return NULL;
|
|
|
|
} /* End verifyChannel */
|
|
|
|
/* ------------------ Begin pc_sched_event ------------------------- */
|
|
|
|
static inline void pc_sched_event(struct channel *ch, int event)
|
|
{ /* Begin pc_sched_event */
|
|
|
|
|
|
/* ----------------------------------------------------------------------
|
|
We call this to schedule interrupt processing on some event. The
|
|
kernel sees our request and calls the related routine in OUR driver.
|
|
-------------------------------------------------------------------------*/
|
|
|
|
ch->event |= 1 << event;
|
|
schedule_work(&ch->tqueue);
|
|
|
|
|
|
} /* End pc_sched_event */
|
|
|
|
/* ------------------ Begin epca_error ------------------------- */
|
|
|
|
static void epca_error(int line, char *msg)
|
|
{ /* Begin epca_error */
|
|
|
|
printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg);
|
|
return;
|
|
|
|
} /* End epca_error */
|
|
|
|
/* ------------------ Begin pc_close ------------------------- */
|
|
static void pc_close(struct tty_struct * tty, struct file * filp)
|
|
{ /* Begin pc_close */
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if ch != NULL */
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
if (tty_hung_up_p(filp))
|
|
{
|
|
restore_flags(flags);
|
|
return;
|
|
}
|
|
|
|
/* Check to see if the channel is open more than once */
|
|
if (ch->count-- > 1)
|
|
{ /* Begin channel is open more than once */
|
|
|
|
/* -------------------------------------------------------------
|
|
Return without doing anything. Someone might still be using
|
|
the channel.
|
|
---------------------------------------------------------------- */
|
|
|
|
restore_flags(flags);
|
|
return;
|
|
} /* End channel is open more than once */
|
|
|
|
/* Port open only once go ahead with shutdown & reset */
|
|
|
|
if (ch->count < 0)
|
|
{
|
|
ch->count = 0;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------
|
|
Let the rest of the driver know the channel is being closed.
|
|
This becomes important if an open is attempted before close
|
|
is finished.
|
|
------------------------------------------------------------------ */
|
|
|
|
ch->asyncflags |= ASYNC_CLOSING;
|
|
|
|
tty->closing = 1;
|
|
|
|
if (ch->asyncflags & ASYNC_INITIALIZED)
|
|
{
|
|
/* Setup an event to indicate when the transmit buffer empties */
|
|
setup_empty_event(tty, ch);
|
|
tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
|
|
}
|
|
|
|
if (tty->driver->flush_buffer)
|
|
tty->driver->flush_buffer(tty);
|
|
|
|
tty_ldisc_flush(tty);
|
|
shutdown(ch);
|
|
tty->closing = 0;
|
|
ch->event = 0;
|
|
ch->tty = NULL;
|
|
|
|
if (ch->blocked_open)
|
|
{ /* Begin if blocked_open */
|
|
|
|
if (ch->close_delay)
|
|
{
|
|
msleep_interruptible(jiffies_to_msecs(ch->close_delay));
|
|
}
|
|
|
|
wake_up_interruptible(&ch->open_wait);
|
|
|
|
} /* End if blocked_open */
|
|
|
|
ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
|
|
ASYNC_CLOSING);
|
|
wake_up_interruptible(&ch->close_wait);
|
|
|
|
|
|
restore_flags(flags);
|
|
|
|
} /* End if ch != NULL */
|
|
|
|
} /* End pc_close */
|
|
|
|
/* ------------------ Begin shutdown ------------------------- */
|
|
|
|
static void shutdown(struct channel *ch)
|
|
{ /* Begin shutdown */
|
|
|
|
unsigned long flags;
|
|
struct tty_struct *tty;
|
|
volatile struct board_chan *bc;
|
|
|
|
if (!(ch->asyncflags & ASYNC_INITIALIZED))
|
|
return;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
bc = ch->brdchan;
|
|
|
|
/* ------------------------------------------------------------------
|
|
In order for an event to be generated on the receipt of data the
|
|
idata flag must be set. Since we are shutting down, this is not
|
|
necessary clear this flag.
|
|
--------------------------------------------------------------------- */
|
|
|
|
if (bc)
|
|
bc->idata = 0;
|
|
|
|
tty = ch->tty;
|
|
|
|
/* ----------------------------------------------------------------
|
|
If we're a modem control device and HUPCL is on, drop RTS & DTR.
|
|
------------------------------------------------------------------ */
|
|
|
|
if (tty->termios->c_cflag & HUPCL)
|
|
{
|
|
ch->omodem &= ~(ch->m_rts | ch->m_dtr);
|
|
fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1);
|
|
}
|
|
|
|
memoff(ch);
|
|
|
|
/* ------------------------------------------------------------------
|
|
The channel has officialy been closed. The next time it is opened
|
|
it will have to reinitialized. Set a flag to indicate this.
|
|
---------------------------------------------------------------------- */
|
|
|
|
/* Prevent future Digi programmed interrupts from coming active */
|
|
|
|
ch->asyncflags &= ~ASYNC_INITIALIZED;
|
|
restore_flags(flags);
|
|
|
|
} /* End shutdown */
|
|
|
|
/* ------------------ Begin pc_hangup ------------------------- */
|
|
|
|
static void pc_hangup(struct tty_struct *tty)
|
|
{ /* Begin pc_hangup */
|
|
|
|
struct channel *ch;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if ch != NULL */
|
|
|
|
unsigned long flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
if (tty->driver->flush_buffer)
|
|
tty->driver->flush_buffer(tty);
|
|
tty_ldisc_flush(tty);
|
|
shutdown(ch);
|
|
|
|
ch->tty = NULL;
|
|
ch->event = 0;
|
|
ch->count = 0;
|
|
restore_flags(flags);
|
|
ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
|
|
wake_up_interruptible(&ch->open_wait);
|
|
|
|
} /* End if ch != NULL */
|
|
|
|
} /* End pc_hangup */
|
|
|
|
/* ------------------ Begin pc_write ------------------------- */
|
|
|
|
static int pc_write(struct tty_struct * tty,
|
|
const unsigned char *buf, int bytesAvailable)
|
|
{ /* Begin pc_write */
|
|
|
|
register unsigned int head, tail;
|
|
register int dataLen;
|
|
register int size;
|
|
register int amountCopied;
|
|
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
int remain;
|
|
volatile struct board_chan *bc;
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
pc_write is primarily called directly by the kernel routine
|
|
tty_write (Though it can also be called by put_char) found in
|
|
tty_io.c. pc_write is passed a line discipline buffer where
|
|
the data to be written out is stored. The line discipline
|
|
implementation itself is done at the kernel level and is not
|
|
brought into the driver.
|
|
------------------------------------------------------------------- */
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) == NULL)
|
|
return 0;
|
|
|
|
/* Make a pointer to the channel data structure found on the board. */
|
|
|
|
bc = ch->brdchan;
|
|
size = ch->txbufsize;
|
|
|
|
amountCopied = 0;
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
globalwinon(ch);
|
|
|
|
head = bc->tin & (size - 1);
|
|
tail = bc->tout;
|
|
|
|
if (tail != bc->tout)
|
|
tail = bc->tout;
|
|
tail &= (size - 1);
|
|
|
|
/* If head >= tail, head has not wrapped around. */
|
|
if (head >= tail)
|
|
{ /* Begin head has not wrapped */
|
|
|
|
/* ---------------------------------------------------------------
|
|
remain (much like dataLen above) represents the total amount of
|
|
space available on the card for data. Here dataLen represents
|
|
the space existing between the head pointer and the end of
|
|
buffer. This is important because a memcpy cannot be told to
|
|
automatically wrap around when it hits the buffer end.
|
|
------------------------------------------------------------------ */
|
|
|
|
dataLen = size - head;
|
|
remain = size - (head - tail) - 1;
|
|
|
|
} /* End head has not wrapped */
|
|
else
|
|
{ /* Begin head has wrapped around */
|
|
|
|
remain = tail - head - 1;
|
|
dataLen = remain;
|
|
|
|
} /* End head has wrapped around */
|
|
|
|
/* -------------------------------------------------------------------
|
|
Check the space on the card. If we have more data than
|
|
space; reduce the amount of data to fit the space.
|
|
---------------------------------------------------------------------- */
|
|
|
|
bytesAvailable = min(remain, bytesAvailable);
|
|
|
|
txwinon(ch);
|
|
while (bytesAvailable > 0)
|
|
{ /* Begin while there is data to copy onto card */
|
|
|
|
/* -----------------------------------------------------------------
|
|
If head is not wrapped, the below will make sure the first
|
|
data copy fills to the end of card buffer.
|
|
------------------------------------------------------------------- */
|
|
|
|
dataLen = min(bytesAvailable, dataLen);
|
|
memcpy(ch->txptr + head, buf, dataLen);
|
|
buf += dataLen;
|
|
head += dataLen;
|
|
amountCopied += dataLen;
|
|
bytesAvailable -= dataLen;
|
|
|
|
if (head >= size)
|
|
{
|
|
head = 0;
|
|
dataLen = tail;
|
|
}
|
|
|
|
} /* End while there is data to copy onto card */
|
|
|
|
ch->statusflags |= TXBUSY;
|
|
globalwinon(ch);
|
|
bc->tin = head;
|
|
|
|
if ((ch->statusflags & LOWWAIT) == 0)
|
|
{
|
|
ch->statusflags |= LOWWAIT;
|
|
bc->ilow = 1;
|
|
}
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
return(amountCopied);
|
|
|
|
} /* End pc_write */
|
|
|
|
/* ------------------ Begin pc_put_char ------------------------- */
|
|
|
|
static void pc_put_char(struct tty_struct *tty, unsigned char c)
|
|
{ /* Begin pc_put_char */
|
|
|
|
|
|
pc_write(tty, &c, 1);
|
|
return;
|
|
|
|
} /* End pc_put_char */
|
|
|
|
/* ------------------ Begin pc_write_room ------------------------- */
|
|
|
|
static int pc_write_room(struct tty_struct *tty)
|
|
{ /* Begin pc_write_room */
|
|
|
|
int remain;
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
unsigned int head, tail;
|
|
volatile struct board_chan *bc;
|
|
|
|
remain = 0;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
bc = ch->brdchan;
|
|
head = bc->tin & (ch->txbufsize - 1);
|
|
tail = bc->tout;
|
|
|
|
if (tail != bc->tout)
|
|
tail = bc->tout;
|
|
/* Wrap tail if necessary */
|
|
tail &= (ch->txbufsize - 1);
|
|
|
|
if ((remain = tail - head - 1) < 0 )
|
|
remain += ch->txbufsize;
|
|
|
|
if (remain && (ch->statusflags & LOWWAIT) == 0)
|
|
{
|
|
ch->statusflags |= LOWWAIT;
|
|
bc->ilow = 1;
|
|
}
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
}
|
|
|
|
/* Return how much room is left on card */
|
|
return remain;
|
|
|
|
} /* End pc_write_room */
|
|
|
|
/* ------------------ Begin pc_chars_in_buffer ---------------------- */
|
|
|
|
static int pc_chars_in_buffer(struct tty_struct *tty)
|
|
{ /* Begin pc_chars_in_buffer */
|
|
|
|
int chars;
|
|
unsigned int ctail, head, tail;
|
|
int remain;
|
|
unsigned long flags;
|
|
struct channel *ch;
|
|
volatile struct board_chan *bc;
|
|
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) == NULL)
|
|
return(0);
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
bc = ch->brdchan;
|
|
tail = bc->tout;
|
|
head = bc->tin;
|
|
ctail = ch->mailbox->cout;
|
|
|
|
if (tail == head && ch->mailbox->cin == ctail && bc->tbusy == 0)
|
|
chars = 0;
|
|
else
|
|
{ /* Begin if some space on the card has been used */
|
|
|
|
head = bc->tin & (ch->txbufsize - 1);
|
|
tail &= (ch->txbufsize - 1);
|
|
|
|
/* --------------------------------------------------------------
|
|
The logic here is basically opposite of the above pc_write_room
|
|
here we are finding the amount of bytes in the buffer filled.
|
|
Not the amount of bytes empty.
|
|
------------------------------------------------------------------- */
|
|
|
|
if ((remain = tail - head - 1) < 0 )
|
|
remain += ch->txbufsize;
|
|
|
|
chars = (int)(ch->txbufsize - remain);
|
|
|
|
/* -------------------------------------------------------------
|
|
Make it possible to wakeup anything waiting for output
|
|
in tty_ioctl.c, etc.
|
|
|
|
If not already set. Setup an event to indicate when the
|
|
transmit buffer empties
|
|
----------------------------------------------------------------- */
|
|
|
|
if (!(ch->statusflags & EMPTYWAIT))
|
|
setup_empty_event(tty,ch);
|
|
|
|
} /* End if some space on the card has been used */
|
|
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
/* Return number of characters residing on card. */
|
|
return(chars);
|
|
|
|
} /* End pc_chars_in_buffer */
|
|
|
|
/* ------------------ Begin pc_flush_buffer ---------------------- */
|
|
|
|
static void pc_flush_buffer(struct tty_struct *tty)
|
|
{ /* Begin pc_flush_buffer */
|
|
|
|
unsigned int tail;
|
|
unsigned long flags;
|
|
struct channel *ch;
|
|
volatile struct board_chan *bc;
|
|
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) == NULL)
|
|
return;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
globalwinon(ch);
|
|
|
|
bc = ch->brdchan;
|
|
tail = bc->tout;
|
|
|
|
/* Have FEP move tout pointer; effectively flushing transmit buffer */
|
|
|
|
fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0);
|
|
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
tty_wakeup(tty);
|
|
|
|
} /* End pc_flush_buffer */
|
|
|
|
/* ------------------ Begin pc_flush_chars ---------------------- */
|
|
|
|
static void pc_flush_chars(struct tty_struct *tty)
|
|
{ /* Begin pc_flush_chars */
|
|
|
|
struct channel * ch;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{
|
|
unsigned long flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
/* ----------------------------------------------------------------
|
|
If not already set and the transmitter is busy setup an event
|
|
to indicate when the transmit empties.
|
|
------------------------------------------------------------------- */
|
|
|
|
if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT))
|
|
setup_empty_event(tty,ch);
|
|
|
|
restore_flags(flags);
|
|
}
|
|
|
|
} /* End pc_flush_chars */
|
|
|
|
/* ------------------ Begin block_til_ready ---------------------- */
|
|
|
|
static int block_til_ready(struct tty_struct *tty,
|
|
struct file *filp, struct channel *ch)
|
|
{ /* Begin block_til_ready */
|
|
|
|
DECLARE_WAITQUEUE(wait,current);
|
|
int retval, do_clocal = 0;
|
|
unsigned long flags;
|
|
|
|
|
|
if (tty_hung_up_p(filp))
|
|
{
|
|
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
|
|
retval = -EAGAIN;
|
|
else
|
|
retval = -ERESTARTSYS;
|
|
return(retval);
|
|
}
|
|
|
|
/* -----------------------------------------------------------------
|
|
If the device is in the middle of being closed, then block
|
|
until it's done, and then try again.
|
|
-------------------------------------------------------------------- */
|
|
if (ch->asyncflags & ASYNC_CLOSING)
|
|
{
|
|
interruptible_sleep_on(&ch->close_wait);
|
|
|
|
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
|
|
return -EAGAIN;
|
|
else
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
if (filp->f_flags & O_NONBLOCK)
|
|
{
|
|
/* -----------------------------------------------------------------
|
|
If non-blocking mode is set, then make the check up front
|
|
and then exit.
|
|
-------------------------------------------------------------------- */
|
|
|
|
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
if (tty->termios->c_cflag & CLOCAL)
|
|
do_clocal = 1;
|
|
|
|
/* Block waiting for the carrier detect and the line to become free */
|
|
|
|
retval = 0;
|
|
add_wait_queue(&ch->open_wait, &wait);
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
|
|
/* We dec count so that pc_close will know when to free things */
|
|
if (!tty_hung_up_p(filp))
|
|
ch->count--;
|
|
|
|
restore_flags(flags);
|
|
|
|
ch->blocked_open++;
|
|
|
|
while(1)
|
|
{ /* Begin forever while */
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
if (tty_hung_up_p(filp) ||
|
|
!(ch->asyncflags & ASYNC_INITIALIZED))
|
|
{
|
|
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
|
|
retval = -EAGAIN;
|
|
else
|
|
retval = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
|
|
if (!(ch->asyncflags & ASYNC_CLOSING) &&
|
|
(do_clocal || (ch->imodem & ch->dcd)))
|
|
break;
|
|
|
|
if (signal_pending(current))
|
|
{
|
|
retval = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------
|
|
Allow someone else to be scheduled. We will occasionally go
|
|
through this loop until one of the above conditions change.
|
|
The below schedule call will allow other processes to enter and
|
|
prevent this loop from hogging the cpu.
|
|
------------------------------------------------------------------ */
|
|
schedule();
|
|
|
|
} /* End forever while */
|
|
|
|
current->state = TASK_RUNNING;
|
|
remove_wait_queue(&ch->open_wait, &wait);
|
|
cli();
|
|
if (!tty_hung_up_p(filp))
|
|
ch->count++;
|
|
restore_flags(flags);
|
|
|
|
ch->blocked_open--;
|
|
|
|
if (retval)
|
|
return retval;
|
|
|
|
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
|
|
|
|
return 0;
|
|
|
|
} /* End block_til_ready */
|
|
|
|
/* ------------------ Begin pc_open ---------------------- */
|
|
|
|
static int pc_open(struct tty_struct *tty, struct file * filp)
|
|
{ /* Begin pc_open */
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
int line, retval, boardnum;
|
|
volatile struct board_chan *bc;
|
|
volatile unsigned int head;
|
|
|
|
line = tty->index;
|
|
if (line < 0 || line >= nbdevs)
|
|
{
|
|
printk(KERN_ERR "<Error> - pc_open : line out of range in pc_open\n");
|
|
tty->driver_data = NULL;
|
|
return(-ENODEV);
|
|
}
|
|
|
|
|
|
ch = &digi_channels[line];
|
|
boardnum = ch->boardnum;
|
|
|
|
/* Check status of board configured in system. */
|
|
|
|
/* -----------------------------------------------------------------
|
|
I check to see if the epca_setup routine detected an user error.
|
|
It might be better to put this in pc_init, but for the moment it
|
|
goes here.
|
|
---------------------------------------------------------------------- */
|
|
|
|
if (invalid_lilo_config)
|
|
{
|
|
if (setup_error_code & INVALID_BOARD_TYPE)
|
|
printk(KERN_ERR "<Error> - pc_open: Invalid board type specified in LILO command\n");
|
|
|
|
if (setup_error_code & INVALID_NUM_PORTS)
|
|
printk(KERN_ERR "<Error> - pc_open: Invalid number of ports specified in LILO command\n");
|
|
|
|
if (setup_error_code & INVALID_MEM_BASE)
|
|
printk(KERN_ERR "<Error> - pc_open: Invalid board memory address specified in LILO command\n");
|
|
|
|
if (setup_error_code & INVALID_PORT_BASE)
|
|
printk(KERN_ERR "<Error> - pc_open: Invalid board port address specified in LILO command\n");
|
|
|
|
if (setup_error_code & INVALID_BOARD_STATUS)
|
|
printk(KERN_ERR "<Error> - pc_open: Invalid board status specified in LILO command\n");
|
|
|
|
if (setup_error_code & INVALID_ALTPIN)
|
|
printk(KERN_ERR "<Error> - pc_open: Invalid board altpin specified in LILO command\n");
|
|
|
|
tty->driver_data = NULL; /* Mark this device as 'down' */
|
|
return(-ENODEV);
|
|
}
|
|
|
|
if ((boardnum >= num_cards) || (boards[boardnum].status == DISABLED))
|
|
{
|
|
tty->driver_data = NULL; /* Mark this device as 'down' */
|
|
return(-ENODEV);
|
|
}
|
|
|
|
if (( bc = ch->brdchan) == 0)
|
|
{
|
|
tty->driver_data = NULL;
|
|
return(-ENODEV);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------
|
|
Every time a channel is opened, increment a counter. This is
|
|
necessary because we do not wish to flush and shutdown the channel
|
|
until the last app holding the channel open, closes it.
|
|
--------------------------------------------------------------------- */
|
|
|
|
ch->count++;
|
|
|
|
/* ----------------------------------------------------------------
|
|
Set a kernel structures pointer to our local channel
|
|
structure. This way we can get to it when passed only
|
|
a tty struct.
|
|
------------------------------------------------------------------ */
|
|
|
|
tty->driver_data = ch;
|
|
|
|
/* ----------------------------------------------------------------
|
|
If this is the first time the channel has been opened, initialize
|
|
the tty->termios struct otherwise let pc_close handle it.
|
|
-------------------------------------------------------------------- */
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
globalwinon(ch);
|
|
ch->statusflags = 0;
|
|
|
|
/* Save boards current modem status */
|
|
ch->imodem = bc->mstat;
|
|
|
|
/* ----------------------------------------------------------------
|
|
Set receive head and tail ptrs to each other. This indicates
|
|
no data available to read.
|
|
----------------------------------------------------------------- */
|
|
head = bc->rin;
|
|
bc->rout = head;
|
|
|
|
/* Set the channels associated tty structure */
|
|
ch->tty = tty;
|
|
|
|
/* -----------------------------------------------------------------
|
|
The below routine generally sets up parity, baud, flow control
|
|
issues, etc.... It effect both control flags and input flags.
|
|
-------------------------------------------------------------------- */
|
|
epcaparam(tty,ch);
|
|
|
|
ch->asyncflags |= ASYNC_INITIALIZED;
|
|
memoff(ch);
|
|
|
|
restore_flags(flags);
|
|
|
|
retval = block_til_ready(tty, filp, ch);
|
|
if (retval)
|
|
{
|
|
return retval;
|
|
}
|
|
|
|
/* -------------------------------------------------------------
|
|
Set this again in case a hangup set it to zero while this
|
|
open() was waiting for the line...
|
|
--------------------------------------------------------------- */
|
|
ch->tty = tty;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
/* Enable Digi Data events */
|
|
bc->idata = 1;
|
|
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
return 0;
|
|
|
|
} /* End pc_open */
|
|
|
|
#ifdef MODULE
|
|
static int __init epca_module_init(void)
|
|
{ /* Begin init_module */
|
|
|
|
unsigned long flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
pc_init();
|
|
|
|
restore_flags(flags);
|
|
|
|
return(0);
|
|
}
|
|
|
|
module_init(epca_module_init);
|
|
#endif
|
|
|
|
#ifdef ENABLE_PCI
|
|
static struct pci_driver epca_driver;
|
|
#endif
|
|
|
|
#ifdef MODULE
|
|
/* -------------------- Begin cleanup_module ---------------------- */
|
|
|
|
static void __exit epca_module_exit(void)
|
|
{
|
|
|
|
int count, crd;
|
|
struct board_info *bd;
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
|
|
del_timer_sync(&epca_timer);
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
if ((tty_unregister_driver(pc_driver)) ||
|
|
(tty_unregister_driver(pc_info)))
|
|
{
|
|
printk(KERN_WARNING "<Error> - DIGI : cleanup_module failed to un-register tty driver\n");
|
|
restore_flags(flags);
|
|
return;
|
|
}
|
|
put_tty_driver(pc_driver);
|
|
put_tty_driver(pc_info);
|
|
|
|
for (crd = 0; crd < num_cards; crd++)
|
|
{ /* Begin for each card */
|
|
|
|
bd = &boards[crd];
|
|
|
|
if (!bd)
|
|
{ /* Begin sanity check */
|
|
printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n");
|
|
return;
|
|
} /* End sanity check */
|
|
|
|
ch = card_ptr[crd];
|
|
|
|
for (count = 0; count < bd->numports; count++, ch++)
|
|
{ /* Begin for each port */
|
|
|
|
if (ch)
|
|
{
|
|
if (ch->tty)
|
|
tty_hangup(ch->tty);
|
|
kfree(ch->tmp_buf);
|
|
}
|
|
|
|
} /* End for each port */
|
|
} /* End for each card */
|
|
|
|
#ifdef ENABLE_PCI
|
|
pci_unregister_driver (&epca_driver);
|
|
#endif
|
|
|
|
restore_flags(flags);
|
|
|
|
}
|
|
module_exit(epca_module_exit);
|
|
#endif /* MODULE */
|
|
|
|
static struct tty_operations pc_ops = {
|
|
.open = pc_open,
|
|
.close = pc_close,
|
|
.write = pc_write,
|
|
.write_room = pc_write_room,
|
|
.flush_buffer = pc_flush_buffer,
|
|
.chars_in_buffer = pc_chars_in_buffer,
|
|
.flush_chars = pc_flush_chars,
|
|
.put_char = pc_put_char,
|
|
.ioctl = pc_ioctl,
|
|
.set_termios = pc_set_termios,
|
|
.stop = pc_stop,
|
|
.start = pc_start,
|
|
.throttle = pc_throttle,
|
|
.unthrottle = pc_unthrottle,
|
|
.hangup = pc_hangup,
|
|
};
|
|
|
|
static int info_open(struct tty_struct *tty, struct file * filp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct tty_operations info_ops = {
|
|
.open = info_open,
|
|
.ioctl = info_ioctl,
|
|
};
|
|
|
|
/* ------------------ Begin pc_init ---------------------- */
|
|
|
|
int __init pc_init(void)
|
|
{ /* Begin pc_init */
|
|
|
|
/* ----------------------------------------------------------------
|
|
pc_init is called by the operating system during boot up prior to
|
|
any open calls being made. In the older versions of Linux (Prior
|
|
to 2.0.0) an entry is made into tty_io.c. A pointer to the last
|
|
memory location (from kernel space) used (kmem_start) is passed
|
|
to pc_init. It is pc_inits responsibility to modify this value
|
|
for any memory that the Digi driver might need and then return
|
|
this value to the operating system. For example if the driver
|
|
wishes to allocate 1K of kernel memory, pc_init would return
|
|
(kmem_start + 1024). This memory (Between kmem_start and kmem_start
|
|
+ 1024) would then be available for use exclusively by the driver.
|
|
In this case our driver does not allocate any of this kernel
|
|
memory.
|
|
------------------------------------------------------------------*/
|
|
|
|
ulong flags;
|
|
int crd;
|
|
struct board_info *bd;
|
|
unsigned char board_id = 0;
|
|
|
|
#ifdef ENABLE_PCI
|
|
int pci_boards_found, pci_count;
|
|
|
|
pci_count = 0;
|
|
#endif /* ENABLE_PCI */
|
|
|
|
pc_driver = alloc_tty_driver(MAX_ALLOC);
|
|
if (!pc_driver)
|
|
return -ENOMEM;
|
|
|
|
pc_info = alloc_tty_driver(MAX_ALLOC);
|
|
if (!pc_info) {
|
|
put_tty_driver(pc_driver);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------
|
|
If epca_setup has not been ran by LILO set num_cards to defaults; copy
|
|
board structure defined by digiConfig into drivers board structure.
|
|
Note : If LILO has ran epca_setup then epca_setup will handle defining
|
|
num_cards as well as copying the data into the board structure.
|
|
-------------------------------------------------------------------------- */
|
|
if (!liloconfig)
|
|
{ /* Begin driver has been configured via. epcaconfig */
|
|
|
|
nbdevs = NBDEVS;
|
|
num_cards = NUMCARDS;
|
|
memcpy((void *)&boards, (void *)&static_boards,
|
|
(sizeof(struct board_info) * NUMCARDS));
|
|
} /* End driver has been configured via. epcaconfig */
|
|
|
|
/* -----------------------------------------------------------------
|
|
Note : If lilo was used to configure the driver and the
|
|
ignore epcaconfig option was choosen (digiepca=2) then
|
|
nbdevs and num_cards will equal 0 at this point. This is
|
|
okay; PCI cards will still be picked up if detected.
|
|
--------------------------------------------------------------------- */
|
|
|
|
/* -----------------------------------------------------------
|
|
Set up interrupt, we will worry about memory allocation in
|
|
post_fep_init.
|
|
--------------------------------------------------------------- */
|
|
|
|
|
|
printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION);
|
|
|
|
#ifdef ENABLE_PCI
|
|
|
|
/* ------------------------------------------------------------------
|
|
NOTE : This code assumes that the number of ports found in
|
|
the boards array is correct. This could be wrong if
|
|
the card in question is PCI (And therefore has no ports
|
|
entry in the boards structure.) The rest of the
|
|
information will be valid for PCI because the beginning
|
|
of pc_init scans for PCI and determines i/o and base
|
|
memory addresses. I am not sure if it is possible to
|
|
read the number of ports supported by the card prior to
|
|
it being booted (Since that is the state it is in when
|
|
pc_init is run). Because it is not possible to query the
|
|
number of supported ports until after the card has booted;
|
|
we are required to calculate the card_ptrs as the card is
|
|
is initialized (Inside post_fep_init). The negative thing
|
|
about this approach is that digiDload's call to GET_INFO
|
|
will have a bad port value. (Since this is called prior
|
|
to post_fep_init.)
|
|
|
|
--------------------------------------------------------------------- */
|
|
|
|
pci_boards_found = 0;
|
|
if(num_cards < MAXBOARDS)
|
|
pci_boards_found += init_PCI();
|
|
num_cards += pci_boards_found;
|
|
|
|
#endif /* ENABLE_PCI */
|
|
|
|
pc_driver->owner = THIS_MODULE;
|
|
pc_driver->name = "ttyD";
|
|
pc_driver->devfs_name = "tts/D";
|
|
pc_driver->major = DIGI_MAJOR;
|
|
pc_driver->minor_start = 0;
|
|
pc_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
pc_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
pc_driver->init_termios = tty_std_termios;
|
|
pc_driver->init_termios.c_iflag = 0;
|
|
pc_driver->init_termios.c_oflag = 0;
|
|
pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
|
|
pc_driver->init_termios.c_lflag = 0;
|
|
pc_driver->flags = TTY_DRIVER_REAL_RAW;
|
|
tty_set_operations(pc_driver, &pc_ops);
|
|
|
|
pc_info->owner = THIS_MODULE;
|
|
pc_info->name = "digi_ctl";
|
|
pc_info->major = DIGIINFOMAJOR;
|
|
pc_info->minor_start = 0;
|
|
pc_info->type = TTY_DRIVER_TYPE_SERIAL;
|
|
pc_info->subtype = SERIAL_TYPE_INFO;
|
|
pc_info->init_termios = tty_std_termios;
|
|
pc_info->init_termios.c_iflag = 0;
|
|
pc_info->init_termios.c_oflag = 0;
|
|
pc_info->init_termios.c_lflag = 0;
|
|
pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL;
|
|
pc_info->flags = TTY_DRIVER_REAL_RAW;
|
|
tty_set_operations(pc_info, &info_ops);
|
|
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
for (crd = 0; crd < num_cards; crd++)
|
|
{ /* Begin for each card */
|
|
|
|
/* ------------------------------------------------------------------
|
|
This is where the appropriate memory handlers for the hardware is
|
|
set. Everything at runtime blindly jumps through these vectors.
|
|
---------------------------------------------------------------------- */
|
|
|
|
/* defined in epcaconfig.h */
|
|
bd = &boards[crd];
|
|
|
|
switch (bd->type)
|
|
{ /* Begin switch on bd->type {board type} */
|
|
case PCXEM:
|
|
case EISAXEM:
|
|
bd->memwinon = pcxem_memwinon ;
|
|
bd->memwinoff = pcxem_memwinoff ;
|
|
bd->globalwinon = pcxem_globalwinon ;
|
|
bd->txwinon = pcxem_txwinon ;
|
|
bd->rxwinon = pcxem_rxwinon ;
|
|
bd->memoff = pcxem_memoff ;
|
|
bd->assertgwinon = dummy_assertgwinon;
|
|
bd->assertmemoff = dummy_assertmemoff;
|
|
break;
|
|
|
|
case PCIXEM:
|
|
case PCIXRJ:
|
|
case PCIXR:
|
|
bd->memwinon = dummy_memwinon;
|
|
bd->memwinoff = dummy_memwinoff;
|
|
bd->globalwinon = dummy_globalwinon;
|
|
bd->txwinon = dummy_txwinon;
|
|
bd->rxwinon = dummy_rxwinon;
|
|
bd->memoff = dummy_memoff;
|
|
bd->assertgwinon = dummy_assertgwinon;
|
|
bd->assertmemoff = dummy_assertmemoff;
|
|
break;
|
|
|
|
case PCXE:
|
|
case PCXEVE:
|
|
|
|
bd->memwinon = pcxe_memwinon;
|
|
bd->memwinoff = pcxe_memwinoff;
|
|
bd->globalwinon = pcxe_globalwinon;
|
|
bd->txwinon = pcxe_txwinon;
|
|
bd->rxwinon = pcxe_rxwinon;
|
|
bd->memoff = pcxe_memoff;
|
|
bd->assertgwinon = dummy_assertgwinon;
|
|
bd->assertmemoff = dummy_assertmemoff;
|
|
break;
|
|
|
|
case PCXI:
|
|
case PC64XE:
|
|
|
|
bd->memwinon = pcxi_memwinon;
|
|
bd->memwinoff = pcxi_memwinoff;
|
|
bd->globalwinon = pcxi_globalwinon;
|
|
bd->txwinon = pcxi_txwinon;
|
|
bd->rxwinon = pcxi_rxwinon;
|
|
bd->memoff = pcxi_memoff;
|
|
bd->assertgwinon = pcxi_assertgwinon;
|
|
bd->assertmemoff = pcxi_assertmemoff;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
|
|
} /* End switch on bd->type */
|
|
|
|
/* ---------------------------------------------------------------
|
|
Some cards need a memory segment to be defined for use in
|
|
transmit and receive windowing operations. These boards
|
|
are listed in the below switch. In the case of the XI the
|
|
amount of memory on the board is variable so the memory_seg
|
|
is also variable. This code determines what they segment
|
|
should be.
|
|
----------------------------------------------------------------- */
|
|
|
|
switch (bd->type)
|
|
{ /* Begin switch on bd->type {board type} */
|
|
|
|
case PCXE:
|
|
case PCXEVE:
|
|
case PC64XE:
|
|
bd->memory_seg = 0xf000;
|
|
break;
|
|
|
|
case PCXI:
|
|
board_id = inb((int)bd->port);
|
|
if ((board_id & 0x1) == 0x1)
|
|
{ /* Begin it's an XI card */
|
|
|
|
/* Is it a 64K board */
|
|
if ((board_id & 0x30) == 0)
|
|
bd->memory_seg = 0xf000;
|
|
|
|
/* Is it a 128K board */
|
|
if ((board_id & 0x30) == 0x10)
|
|
bd->memory_seg = 0xe000;
|
|
|
|
/* Is is a 256K board */
|
|
if ((board_id & 0x30) == 0x20)
|
|
bd->memory_seg = 0xc000;
|
|
|
|
/* Is it a 512K board */
|
|
if ((board_id & 0x30) == 0x30)
|
|
bd->memory_seg = 0x8000;
|
|
|
|
} /* End it is an XI card */
|
|
else
|
|
{
|
|
printk(KERN_ERR "<Error> - Board at 0x%x doesn't appear to be an XI\n",(int)bd->port);
|
|
}
|
|
break;
|
|
|
|
} /* End switch on bd->type */
|
|
|
|
} /* End for each card */
|
|
|
|
if (tty_register_driver(pc_driver))
|
|
panic("Couldn't register Digi PC/ driver");
|
|
|
|
if (tty_register_driver(pc_info))
|
|
panic("Couldn't register Digi PC/ info ");
|
|
|
|
/* -------------------------------------------------------------------
|
|
Start up the poller to check for events on all enabled boards
|
|
---------------------------------------------------------------------- */
|
|
|
|
init_timer(&epca_timer);
|
|
epca_timer.function = epcapoll;
|
|
mod_timer(&epca_timer, jiffies + HZ/25);
|
|
|
|
restore_flags(flags);
|
|
|
|
return 0;
|
|
|
|
} /* End pc_init */
|
|
|
|
/* ------------------ Begin post_fep_init ---------------------- */
|
|
|
|
static void post_fep_init(unsigned int crd)
|
|
{ /* Begin post_fep_init */
|
|
|
|
int i;
|
|
unchar *memaddr;
|
|
volatile struct global_data *gd;
|
|
struct board_info *bd;
|
|
volatile struct board_chan *bc;
|
|
struct channel *ch;
|
|
int shrinkmem = 0, lowwater ;
|
|
|
|
/* -------------------------------------------------------------
|
|
This call is made by the user via. the ioctl call DIGI_INIT.
|
|
It is responsible for setting up all the card specific stuff.
|
|
---------------------------------------------------------------- */
|
|
bd = &boards[crd];
|
|
|
|
/* -----------------------------------------------------------------
|
|
If this is a PCI board, get the port info. Remember PCI cards
|
|
do not have entries into the epcaconfig.h file, so we can't get
|
|
the number of ports from it. Unfortunetly, this means that anyone
|
|
doing a DIGI_GETINFO before the board has booted will get an invalid
|
|
number of ports returned (It should return 0). Calls to DIGI_GETINFO
|
|
after DIGI_INIT has been called will return the proper values.
|
|
------------------------------------------------------------------- */
|
|
|
|
if (bd->type >= PCIXEM) /* If the board in question is PCI */
|
|
{ /* Begin get PCI number of ports */
|
|
|
|
/* --------------------------------------------------------------------
|
|
Below we use XEMPORTS as a memory offset regardless of which PCI
|
|
card it is. This is because all of the supported PCI cards have
|
|
the same memory offset for the channel data. This will have to be
|
|
changed if we ever develop a PCI/XE card. NOTE : The FEP manual
|
|
states that the port offset is 0xC22 as opposed to 0xC02. This is
|
|
only true for PC/XE, and PC/XI cards; not for the XEM, or CX series.
|
|
On the PCI cards the number of ports is determined by reading a
|
|
ID PROM located in the box attached to the card. The card can then
|
|
determine the index the id to determine the number of ports available.
|
|
(FYI - The id should be located at 0x1ac (And may use up to 4 bytes
|
|
if the box in question is a XEM or CX)).
|
|
------------------------------------------------------------------------ */
|
|
|
|
bd->numports = (unsigned short)*(unsigned char *)bus_to_virt((unsigned long)
|
|
(bd->re_map_membase + XEMPORTS));
|
|
|
|
|
|
epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports");
|
|
nbdevs += (bd->numports);
|
|
|
|
} /* End get PCI number of ports */
|
|
|
|
if (crd != 0)
|
|
card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports;
|
|
else
|
|
card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */
|
|
|
|
ch = card_ptr[crd];
|
|
|
|
|
|
epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range");
|
|
|
|
memaddr = (unchar *)bd->re_map_membase;
|
|
|
|
/*
|
|
The below command is necessary because newer kernels (2.1.x and
|
|
up) do not have a 1:1 virtual to physical mapping. The below
|
|
call adjust for that.
|
|
*/
|
|
|
|
memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr);
|
|
|
|
/* -----------------------------------------------------------------
|
|
The below assignment will set bc to point at the BEGINING of
|
|
the cards channel structures. For 1 card there will be between
|
|
8 and 64 of these structures.
|
|
-------------------------------------------------------------------- */
|
|
|
|
bc = (volatile struct board_chan *)((ulong)memaddr + CHANSTRUCT);
|
|
|
|
/* -------------------------------------------------------------------
|
|
The below assignment will set gd to point at the BEGINING of
|
|
global memory address 0xc00. The first data in that global
|
|
memory actually starts at address 0xc1a. The command in
|
|
pointer begins at 0xd10.
|
|
---------------------------------------------------------------------- */
|
|
|
|
gd = (volatile struct global_data *)((ulong)memaddr + GLOBAL);
|
|
|
|
/* --------------------------------------------------------------------
|
|
XEPORTS (address 0xc22) points at the number of channels the
|
|
card supports. (For 64XE, XI, XEM, and XR use 0xc02)
|
|
----------------------------------------------------------------------- */
|
|
|
|
if (((bd->type == PCXEVE) | (bd->type == PCXE)) &&
|
|
(*(ushort *)((ulong)memaddr + XEPORTS) < 3))
|
|
shrinkmem = 1;
|
|
if (bd->type < PCIXEM)
|
|
if (!request_region((int)bd->port, 4, board_desc[bd->type]))
|
|
return;
|
|
|
|
memwinon(bd, 0);
|
|
|
|
/* --------------------------------------------------------------------
|
|
Remember ch is the main drivers channels structure, while bc is
|
|
the cards channel structure.
|
|
------------------------------------------------------------------------ */
|
|
|
|
/* For every port on the card do ..... */
|
|
|
|
for (i = 0; i < bd->numports; i++, ch++, bc++)
|
|
{ /* Begin for each port */
|
|
|
|
ch->brdchan = bc;
|
|
ch->mailbox = gd;
|
|
INIT_WORK(&ch->tqueue, do_softint, ch);
|
|
ch->board = &boards[crd];
|
|
|
|
switch (bd->type)
|
|
{ /* Begin switch bd->type */
|
|
|
|
/* ----------------------------------------------------------------
|
|
Since some of the boards use different bitmaps for their
|
|
control signals we cannot hard code these values and retain
|
|
portability. We virtualize this data here.
|
|
------------------------------------------------------------------- */
|
|
case EISAXEM:
|
|
case PCXEM:
|
|
case PCIXEM:
|
|
case PCIXRJ:
|
|
case PCIXR:
|
|
ch->m_rts = 0x02 ;
|
|
ch->m_dcd = 0x80 ;
|
|
ch->m_dsr = 0x20 ;
|
|
ch->m_cts = 0x10 ;
|
|
ch->m_ri = 0x40 ;
|
|
ch->m_dtr = 0x01 ;
|
|
break;
|
|
|
|
case PCXE:
|
|
case PCXEVE:
|
|
case PCXI:
|
|
case PC64XE:
|
|
ch->m_rts = 0x02 ;
|
|
ch->m_dcd = 0x08 ;
|
|
ch->m_dsr = 0x10 ;
|
|
ch->m_cts = 0x20 ;
|
|
ch->m_ri = 0x40 ;
|
|
ch->m_dtr = 0x80 ;
|
|
break;
|
|
|
|
} /* End switch bd->type */
|
|
|
|
if (boards[crd].altpin)
|
|
{
|
|
ch->dsr = ch->m_dcd;
|
|
ch->dcd = ch->m_dsr;
|
|
ch->digiext.digi_flags |= DIGI_ALTPIN;
|
|
}
|
|
else
|
|
{
|
|
ch->dcd = ch->m_dcd;
|
|
ch->dsr = ch->m_dsr;
|
|
}
|
|
|
|
ch->boardnum = crd;
|
|
ch->channelnum = i;
|
|
ch->magic = EPCA_MAGIC;
|
|
ch->tty = NULL;
|
|
|
|
if (shrinkmem)
|
|
{
|
|
fepcmd(ch, SETBUFFER, 32, 0, 0, 0);
|
|
shrinkmem = 0;
|
|
}
|
|
|
|
switch (bd->type)
|
|
{ /* Begin switch bd->type */
|
|
|
|
case PCIXEM:
|
|
case PCIXRJ:
|
|
case PCIXR:
|
|
/* Cover all the 2MEG cards */
|
|
ch->txptr = memaddr + (((bc->tseg) << 4) & 0x1fffff);
|
|
ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x1fffff);
|
|
ch->txwin = FEPWIN | ((bc->tseg) >> 11);
|
|
ch->rxwin = FEPWIN | ((bc->rseg) >> 11);
|
|
break;
|
|
|
|
case PCXEM:
|
|
case EISAXEM:
|
|
/* Cover all the 32K windowed cards */
|
|
/* Mask equal to window size - 1 */
|
|
ch->txptr = memaddr + (((bc->tseg) << 4) & 0x7fff);
|
|
ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x7fff);
|
|
ch->txwin = FEPWIN | ((bc->tseg) >> 11);
|
|
ch->rxwin = FEPWIN | ((bc->rseg) >> 11);
|
|
break;
|
|
|
|
case PCXEVE:
|
|
case PCXE:
|
|
ch->txptr = memaddr + (((bc->tseg - bd->memory_seg) << 4) & 0x1fff);
|
|
ch->txwin = FEPWIN | ((bc->tseg - bd->memory_seg) >> 9);
|
|
ch->rxptr = memaddr + (((bc->rseg - bd->memory_seg) << 4) & 0x1fff);
|
|
ch->rxwin = FEPWIN | ((bc->rseg - bd->memory_seg) >>9 );
|
|
break;
|
|
|
|
case PCXI:
|
|
case PC64XE:
|
|
ch->txptr = memaddr + ((bc->tseg - bd->memory_seg) << 4);
|
|
ch->rxptr = memaddr + ((bc->rseg - bd->memory_seg) << 4);
|
|
ch->txwin = ch->rxwin = 0;
|
|
break;
|
|
|
|
} /* End switch bd->type */
|
|
|
|
ch->txbufhead = 0;
|
|
ch->txbufsize = bc->tmax + 1;
|
|
|
|
ch->rxbufhead = 0;
|
|
ch->rxbufsize = bc->rmax + 1;
|
|
|
|
lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2);
|
|
|
|
/* Set transmitter low water mark */
|
|
fepcmd(ch, STXLWATER, lowwater, 0, 10, 0);
|
|
|
|
/* Set receiver low water mark */
|
|
|
|
fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0);
|
|
|
|
/* Set receiver high water mark */
|
|
|
|
fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0);
|
|
|
|
bc->edelay = 100;
|
|
bc->idata = 1;
|
|
|
|
ch->startc = bc->startc;
|
|
ch->stopc = bc->stopc;
|
|
ch->startca = bc->startca;
|
|
ch->stopca = bc->stopca;
|
|
|
|
ch->fepcflag = 0;
|
|
ch->fepiflag = 0;
|
|
ch->fepoflag = 0;
|
|
ch->fepstartc = 0;
|
|
ch->fepstopc = 0;
|
|
ch->fepstartca = 0;
|
|
ch->fepstopca = 0;
|
|
|
|
ch->close_delay = 50;
|
|
ch->count = 0;
|
|
ch->blocked_open = 0;
|
|
init_waitqueue_head(&ch->open_wait);
|
|
init_waitqueue_head(&ch->close_wait);
|
|
ch->tmp_buf = kmalloc(ch->txbufsize,GFP_KERNEL);
|
|
if (!(ch->tmp_buf))
|
|
{
|
|
printk(KERN_ERR "POST FEP INIT : kmalloc failed for port 0x%x\n",i);
|
|
release_region((int)bd->port, 4);
|
|
while(i-- > 0)
|
|
kfree((ch--)->tmp_buf);
|
|
return;
|
|
}
|
|
else
|
|
memset((void *)ch->tmp_buf,0,ch->txbufsize);
|
|
} /* End for each port */
|
|
|
|
printk(KERN_INFO
|
|
"Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
|
|
VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports);
|
|
sprintf(mesg,
|
|
"Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
|
|
VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports);
|
|
console_print(mesg);
|
|
|
|
memwinoff(bd, 0);
|
|
|
|
} /* End post_fep_init */
|
|
|
|
/* --------------------- Begin epcapoll ------------------------ */
|
|
|
|
static void epcapoll(unsigned long ignored)
|
|
{ /* Begin epcapoll */
|
|
|
|
unsigned long flags;
|
|
int crd;
|
|
volatile unsigned int head, tail;
|
|
struct channel *ch;
|
|
struct board_info *bd;
|
|
|
|
/* -------------------------------------------------------------------
|
|
This routine is called upon every timer interrupt. Even though
|
|
the Digi series cards are capable of generating interrupts this
|
|
method of non-looping polling is more efficient. This routine
|
|
checks for card generated events (Such as receive data, are transmit
|
|
buffer empty) and acts on those events.
|
|
----------------------------------------------------------------------- */
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
for (crd = 0; crd < num_cards; crd++)
|
|
{ /* Begin for each card */
|
|
|
|
bd = &boards[crd];
|
|
ch = card_ptr[crd];
|
|
|
|
if ((bd->status == DISABLED) || digi_poller_inhibited)
|
|
continue; /* Begin loop next interation */
|
|
|
|
/* -----------------------------------------------------------
|
|
assertmemoff is not needed here; indeed it is an empty subroutine.
|
|
It is being kept because future boards may need this as well as
|
|
some legacy boards.
|
|
---------------------------------------------------------------- */
|
|
|
|
assertmemoff(ch);
|
|
|
|
globalwinon(ch);
|
|
|
|
/* ---------------------------------------------------------------
|
|
In this case head and tail actually refer to the event queue not
|
|
the transmit or receive queue.
|
|
------------------------------------------------------------------- */
|
|
|
|
head = ch->mailbox->ein;
|
|
tail = ch->mailbox->eout;
|
|
|
|
/* If head isn't equal to tail we have an event */
|
|
|
|
if (head != tail)
|
|
doevent(crd);
|
|
|
|
memoff(ch);
|
|
|
|
} /* End for each card */
|
|
|
|
mod_timer(&epca_timer, jiffies + (HZ / 25));
|
|
|
|
restore_flags(flags);
|
|
} /* End epcapoll */
|
|
|
|
/* --------------------- Begin doevent ------------------------ */
|
|
|
|
static void doevent(int crd)
|
|
{ /* Begin doevent */
|
|
|
|
volatile unchar *eventbuf;
|
|
struct channel *ch, *chan0;
|
|
static struct tty_struct *tty;
|
|
volatile struct board_info *bd;
|
|
volatile struct board_chan *bc;
|
|
register volatile unsigned int tail, head;
|
|
register int event, channel;
|
|
register int mstat, lstat;
|
|
|
|
/* -------------------------------------------------------------------
|
|
This subroutine is called by epcapoll when an event is detected
|
|
in the event queue. This routine responds to those events.
|
|
--------------------------------------------------------------------- */
|
|
|
|
bd = &boards[crd];
|
|
|
|
chan0 = card_ptr[crd];
|
|
epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range");
|
|
|
|
assertgwinon(chan0);
|
|
|
|
while ((tail = chan0->mailbox->eout) != (head = chan0->mailbox->ein))
|
|
{ /* Begin while something in event queue */
|
|
|
|
assertgwinon(chan0);
|
|
|
|
eventbuf = (volatile unchar *)bus_to_virt((ulong)(bd->re_map_membase + tail + ISTART));
|
|
|
|
/* Get the channel the event occurred on */
|
|
channel = eventbuf[0];
|
|
|
|
/* Get the actual event code that occurred */
|
|
event = eventbuf[1];
|
|
|
|
/* ----------------------------------------------------------------
|
|
The two assignments below get the current modem status (mstat)
|
|
and the previous modem status (lstat). These are useful becuase
|
|
an event could signal a change in modem signals itself.
|
|
------------------------------------------------------------------- */
|
|
|
|
mstat = eventbuf[2];
|
|
lstat = eventbuf[3];
|
|
|
|
ch = chan0 + channel;
|
|
|
|
if ((unsigned)channel >= bd->numports || !ch)
|
|
{
|
|
if (channel >= bd->numports)
|
|
ch = chan0;
|
|
bc = ch->brdchan;
|
|
goto next;
|
|
}
|
|
|
|
if ((bc = ch->brdchan) == NULL)
|
|
goto next;
|
|
|
|
if (event & DATA_IND)
|
|
{ /* Begin DATA_IND */
|
|
|
|
receive_data(ch);
|
|
assertgwinon(ch);
|
|
|
|
} /* End DATA_IND */
|
|
/* else *//* Fix for DCD transition missed bug */
|
|
if (event & MODEMCHG_IND)
|
|
{ /* Begin MODEMCHG_IND */
|
|
|
|
/* A modem signal change has been indicated */
|
|
|
|
ch->imodem = mstat;
|
|
|
|
if (ch->asyncflags & ASYNC_CHECK_CD)
|
|
{
|
|
if (mstat & ch->dcd) /* We are now receiving dcd */
|
|
wake_up_interruptible(&ch->open_wait);
|
|
else
|
|
pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */
|
|
}
|
|
|
|
} /* End MODEMCHG_IND */
|
|
|
|
tty = ch->tty;
|
|
if (tty)
|
|
{ /* Begin if valid tty */
|
|
|
|
if (event & BREAK_IND)
|
|
{ /* Begin if BREAK_IND */
|
|
|
|
/* A break has been indicated */
|
|
|
|
tty->flip.count++;
|
|
*tty->flip.flag_buf_ptr++ = TTY_BREAK;
|
|
|
|
*tty->flip.char_buf_ptr++ = 0;
|
|
|
|
tty_schedule_flip(tty);
|
|
|
|
} /* End if BREAK_IND */
|
|
else
|
|
if (event & LOWTX_IND)
|
|
{ /* Begin LOWTX_IND */
|
|
|
|
if (ch->statusflags & LOWWAIT)
|
|
{ /* Begin if LOWWAIT */
|
|
|
|
ch->statusflags &= ~LOWWAIT;
|
|
tty_wakeup(tty);
|
|
wake_up_interruptible(&tty->write_wait);
|
|
|
|
} /* End if LOWWAIT */
|
|
|
|
} /* End LOWTX_IND */
|
|
else
|
|
if (event & EMPTYTX_IND)
|
|
{ /* Begin EMPTYTX_IND */
|
|
|
|
/* This event is generated by setup_empty_event */
|
|
|
|
ch->statusflags &= ~TXBUSY;
|
|
if (ch->statusflags & EMPTYWAIT)
|
|
{ /* Begin if EMPTYWAIT */
|
|
|
|
ch->statusflags &= ~EMPTYWAIT;
|
|
tty_wakeup(tty);
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
|
|
} /* End if EMPTYWAIT */
|
|
|
|
} /* End EMPTYTX_IND */
|
|
|
|
} /* End if valid tty */
|
|
|
|
|
|
next:
|
|
globalwinon(ch);
|
|
|
|
if (!bc)
|
|
printk(KERN_ERR "<Error> - bc == NULL in doevent!\n");
|
|
else
|
|
bc->idata = 1;
|
|
|
|
chan0->mailbox->eout = (tail + 4) & (IMAX - ISTART - 4);
|
|
globalwinon(chan0);
|
|
|
|
} /* End while something in event queue */
|
|
|
|
} /* End doevent */
|
|
|
|
/* --------------------- Begin fepcmd ------------------------ */
|
|
|
|
static void fepcmd(struct channel *ch, int cmd, int word_or_byte,
|
|
int byte2, int ncmds, int bytecmd)
|
|
{ /* Begin fepcmd */
|
|
|
|
unchar *memaddr;
|
|
unsigned int head, cmdTail, cmdStart, cmdMax;
|
|
long count;
|
|
int n;
|
|
|
|
/* This is the routine in which commands may be passed to the card. */
|
|
|
|
if (ch->board->status == DISABLED)
|
|
{
|
|
return;
|
|
}
|
|
|
|
assertgwinon(ch);
|
|
|
|
/* Remember head (As well as max) is just an offset not a base addr */
|
|
head = ch->mailbox->cin;
|
|
|
|
/* cmdStart is a base address */
|
|
cmdStart = ch->mailbox->cstart;
|
|
|
|
/* ------------------------------------------------------------------
|
|
We do the addition below because we do not want a max pointer
|
|
relative to cmdStart. We want a max pointer that points at the
|
|
physical end of the command queue.
|
|
-------------------------------------------------------------------- */
|
|
|
|
cmdMax = (cmdStart + 4 + (ch->mailbox->cmax));
|
|
|
|
memaddr = ch->board->re_map_membase;
|
|
|
|
/*
|
|
The below command is necessary because newer kernels (2.1.x and
|
|
up) do not have a 1:1 virtual to physical mapping. The below
|
|
call adjust for that.
|
|
*/
|
|
|
|
memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr);
|
|
|
|
if (head >= (cmdMax - cmdStart) || (head & 03))
|
|
{
|
|
printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__,
|
|
cmd, head);
|
|
printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__,
|
|
cmdMax, cmdStart);
|
|
return;
|
|
}
|
|
|
|
if (bytecmd)
|
|
{
|
|
*(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd;
|
|
|
|
*(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum;
|
|
/* Below word_or_byte is bits to set */
|
|
*(volatile unchar *)(memaddr + head + cmdStart + 2) = (unchar)word_or_byte;
|
|
/* Below byte2 is bits to reset */
|
|
*(volatile unchar *)(memaddr + head + cmdStart + 3) = (unchar)byte2;
|
|
|
|
}
|
|
else
|
|
{
|
|
*(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd;
|
|
*(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum;
|
|
*(volatile ushort*)(memaddr + head + cmdStart + 2) = (ushort)word_or_byte;
|
|
}
|
|
|
|
head = (head + 4) & (cmdMax - cmdStart - 4);
|
|
ch->mailbox->cin = head;
|
|
|
|
count = FEPTIMEOUT;
|
|
|
|
for (;;)
|
|
{ /* Begin forever loop */
|
|
|
|
count--;
|
|
if (count == 0)
|
|
{
|
|
printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n");
|
|
return;
|
|
}
|
|
|
|
head = ch->mailbox->cin;
|
|
cmdTail = ch->mailbox->cout;
|
|
|
|
n = (head - cmdTail) & (cmdMax - cmdStart - 4);
|
|
|
|
/* ----------------------------------------------------------
|
|
Basically this will break when the FEP acknowledges the
|
|
command by incrementing cmdTail (Making it equal to head).
|
|
------------------------------------------------------------- */
|
|
|
|
if (n <= ncmds * (sizeof(short) * 4))
|
|
break; /* Well nearly forever :-) */
|
|
|
|
} /* End forever loop */
|
|
|
|
} /* End fepcmd */
|
|
|
|
/* ---------------------------------------------------------------------
|
|
Digi products use fields in their channels structures that are very
|
|
similar to the c_cflag and c_iflag fields typically found in UNIX
|
|
termios structures. The below three routines allow mappings
|
|
between these hardware "flags" and their respective Linux flags.
|
|
------------------------------------------------------------------------- */
|
|
|
|
/* --------------------- Begin termios2digi_h -------------------- */
|
|
|
|
static unsigned termios2digi_h(struct channel *ch, unsigned cflag)
|
|
{ /* Begin termios2digi_h */
|
|
|
|
unsigned res = 0;
|
|
|
|
if (cflag & CRTSCTS)
|
|
{
|
|
ch->digiext.digi_flags |= (RTSPACE | CTSPACE);
|
|
res |= ((ch->m_cts) | (ch->m_rts));
|
|
}
|
|
|
|
if (ch->digiext.digi_flags & RTSPACE)
|
|
res |= ch->m_rts;
|
|
|
|
if (ch->digiext.digi_flags & DTRPACE)
|
|
res |= ch->m_dtr;
|
|
|
|
if (ch->digiext.digi_flags & CTSPACE)
|
|
res |= ch->m_cts;
|
|
|
|
if (ch->digiext.digi_flags & DSRPACE)
|
|
res |= ch->dsr;
|
|
|
|
if (ch->digiext.digi_flags & DCDPACE)
|
|
res |= ch->dcd;
|
|
|
|
if (res & (ch->m_rts))
|
|
ch->digiext.digi_flags |= RTSPACE;
|
|
|
|
if (res & (ch->m_cts))
|
|
ch->digiext.digi_flags |= CTSPACE;
|
|
|
|
return res;
|
|
|
|
} /* End termios2digi_h */
|
|
|
|
/* --------------------- Begin termios2digi_i -------------------- */
|
|
static unsigned termios2digi_i(struct channel *ch, unsigned iflag)
|
|
{ /* Begin termios2digi_i */
|
|
|
|
unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK |
|
|
INPCK | ISTRIP|IXON|IXANY|IXOFF);
|
|
|
|
if (ch->digiext.digi_flags & DIGI_AIXON)
|
|
res |= IAIXON;
|
|
return res;
|
|
|
|
} /* End termios2digi_i */
|
|
|
|
/* --------------------- Begin termios2digi_c -------------------- */
|
|
|
|
static unsigned termios2digi_c(struct channel *ch, unsigned cflag)
|
|
{ /* Begin termios2digi_c */
|
|
|
|
unsigned res = 0;
|
|
|
|
#ifdef SPEED_HACK
|
|
/* CL: HACK to force 115200 at 38400 and 57600 at 19200 Baud */
|
|
if ((cflag & CBAUD)== B38400) cflag=cflag - B38400 + B115200;
|
|
if ((cflag & CBAUD)== B19200) cflag=cflag - B19200 + B57600;
|
|
#endif /* SPEED_HACK */
|
|
|
|
if (cflag & CBAUDEX)
|
|
{ /* Begin detected CBAUDEX */
|
|
|
|
ch->digiext.digi_flags |= DIGI_FAST;
|
|
|
|
/* -------------------------------------------------------------
|
|
HUPCL bit is used by FEP to indicate fast baud
|
|
table is to be used.
|
|
----------------------------------------------------------------- */
|
|
|
|
res |= FEP_HUPCL;
|
|
|
|
} /* End detected CBAUDEX */
|
|
else ch->digiext.digi_flags &= ~DIGI_FAST;
|
|
|
|
/* -------------------------------------------------------------------
|
|
CBAUD has bit position 0x1000 set these days to indicate Linux
|
|
baud rate remap. Digi hardware can't handle the bit assignment.
|
|
(We use a different bit assignment for high speed.). Clear this
|
|
bit out.
|
|
---------------------------------------------------------------------- */
|
|
res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE);
|
|
|
|
/* -------------------------------------------------------------
|
|
This gets a little confusing. The Digi cards have their own
|
|
representation of c_cflags controling baud rate. For the most
|
|
part this is identical to the Linux implementation. However;
|
|
Digi supports one rate (76800) that Linux doesn't. This means
|
|
that the c_cflag entry that would normally mean 76800 for Digi
|
|
actually means 115200 under Linux. Without the below mapping,
|
|
a stty 115200 would only drive the board at 76800. Since
|
|
the rate 230400 is also found after 76800, the same problem afflicts
|
|
us when we choose a rate of 230400. Without the below modificiation
|
|
stty 230400 would actually give us 115200.
|
|
|
|
There are two additional differences. The Linux value for CLOCAL
|
|
(0x800; 0004000) has no meaning to the Digi hardware. Also in
|
|
later releases of Linux; the CBAUD define has CBAUDEX (0x1000;
|
|
0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX
|
|
should be checked for a screened out prior to termios2digi_c
|
|
returning. Since CLOCAL isn't used by the board this can be
|
|
ignored as long as the returned value is used only by Digi hardware.
|
|
----------------------------------------------------------------- */
|
|
|
|
if (cflag & CBAUDEX)
|
|
{
|
|
/* -------------------------------------------------------------
|
|
The below code is trying to guarantee that only baud rates
|
|
115200 and 230400 are remapped. We use exclusive or because
|
|
the various baud rates share common bit positions and therefore
|
|
can't be tested for easily.
|
|
----------------------------------------------------------------- */
|
|
|
|
|
|
if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) ||
|
|
(!((cflag & 0x7) ^ (B230400 & ~CBAUDEX))))
|
|
{
|
|
res += 1;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
|
|
} /* End termios2digi_c */
|
|
|
|
/* --------------------- Begin epcaparam ----------------------- */
|
|
|
|
static void epcaparam(struct tty_struct *tty, struct channel *ch)
|
|
{ /* Begin epcaparam */
|
|
|
|
unsigned int cmdHead;
|
|
struct termios *ts;
|
|
volatile struct board_chan *bc;
|
|
unsigned mval, hflow, cflag, iflag;
|
|
|
|
bc = ch->brdchan;
|
|
epcaassert(bc !=0, "bc out of range");
|
|
|
|
assertgwinon(ch);
|
|
|
|
ts = tty->termios;
|
|
|
|
if ((ts->c_cflag & CBAUD) == 0)
|
|
{ /* Begin CBAUD detected */
|
|
|
|
cmdHead = bc->rin;
|
|
bc->rout = cmdHead;
|
|
cmdHead = bc->tin;
|
|
|
|
/* Changing baud in mid-stream transmission can be wonderful */
|
|
/* ---------------------------------------------------------------
|
|
Flush current transmit buffer by setting cmdTail pointer (tout)
|
|
to cmdHead pointer (tin). Hopefully the transmit buffer is empty.
|
|
----------------------------------------------------------------- */
|
|
|
|
fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0);
|
|
mval = 0;
|
|
|
|
} /* End CBAUD detected */
|
|
else
|
|
{ /* Begin CBAUD not detected */
|
|
|
|
/* -------------------------------------------------------------------
|
|
c_cflags have changed but that change had nothing to do with BAUD.
|
|
Propagate the change to the card.
|
|
---------------------------------------------------------------------- */
|
|
|
|
cflag = termios2digi_c(ch, ts->c_cflag);
|
|
|
|
if (cflag != ch->fepcflag)
|
|
{
|
|
ch->fepcflag = cflag;
|
|
/* Set baud rate, char size, stop bits, parity */
|
|
fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0);
|
|
}
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
If the user has not forced CLOCAL and if the device is not a
|
|
CALLOUT device (Which is always CLOCAL) we set flags such that
|
|
the driver will wait on carrier detect.
|
|
------------------------------------------------------------------- */
|
|
|
|
if (ts->c_cflag & CLOCAL)
|
|
{ /* Begin it is a cud device or a ttyD device with CLOCAL on */
|
|
ch->asyncflags &= ~ASYNC_CHECK_CD;
|
|
} /* End it is a cud device or a ttyD device with CLOCAL on */
|
|
else
|
|
{ /* Begin it is a ttyD device */
|
|
ch->asyncflags |= ASYNC_CHECK_CD;
|
|
} /* End it is a ttyD device */
|
|
|
|
mval = ch->m_dtr | ch->m_rts;
|
|
|
|
} /* End CBAUD not detected */
|
|
|
|
iflag = termios2digi_i(ch, ts->c_iflag);
|
|
|
|
/* Check input mode flags */
|
|
|
|
if (iflag != ch->fepiflag)
|
|
{
|
|
ch->fepiflag = iflag;
|
|
|
|
/* ---------------------------------------------------------------
|
|
Command sets channels iflag structure on the board. Such things
|
|
as input soft flow control, handling of parity errors, and
|
|
break handling are all set here.
|
|
------------------------------------------------------------------- */
|
|
|
|
/* break handling, parity handling, input stripping, flow control chars */
|
|
fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------
|
|
Set the board mint value for this channel. This will cause hardware
|
|
events to be generated each time the DCD signal (Described in mint)
|
|
changes.
|
|
------------------------------------------------------------------- */
|
|
bc->mint = ch->dcd;
|
|
|
|
if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD))
|
|
if (ch->digiext.digi_flags & DIGI_FORCEDCD)
|
|
bc->mint = 0;
|
|
|
|
ch->imodem = bc->mstat;
|
|
|
|
hflow = termios2digi_h(ch, ts->c_cflag);
|
|
|
|
if (hflow != ch->hflow)
|
|
{
|
|
ch->hflow = hflow;
|
|
|
|
/* --------------------------------------------------------------
|
|
Hard flow control has been selected but the board is not
|
|
using it. Activate hard flow control now.
|
|
----------------------------------------------------------------- */
|
|
|
|
fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1);
|
|
}
|
|
|
|
|
|
mval ^= ch->modemfake & (mval ^ ch->modem);
|
|
|
|
if (ch->omodem ^ mval)
|
|
{
|
|
ch->omodem = mval;
|
|
|
|
/* --------------------------------------------------------------
|
|
The below command sets the DTR and RTS mstat structure. If
|
|
hard flow control is NOT active these changes will drive the
|
|
output of the actual DTR and RTS lines. If hard flow control
|
|
is active, the changes will be saved in the mstat structure and
|
|
only asserted when hard flow control is turned off.
|
|
----------------------------------------------------------------- */
|
|
|
|
/* First reset DTR & RTS; then set them */
|
|
fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1);
|
|
fepcmd(ch, SETMODEM, mval, 0, 0, 1);
|
|
|
|
}
|
|
|
|
if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc)
|
|
{
|
|
ch->fepstartc = ch->startc;
|
|
ch->fepstopc = ch->stopc;
|
|
|
|
/* ------------------------------------------------------------
|
|
The XON / XOFF characters have changed; propagate these
|
|
changes to the card.
|
|
--------------------------------------------------------------- */
|
|
|
|
fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
|
|
}
|
|
|
|
if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca)
|
|
{
|
|
ch->fepstartca = ch->startca;
|
|
ch->fepstopca = ch->stopca;
|
|
|
|
/* ---------------------------------------------------------------
|
|
Similar to the above, this time the auxilarly XON / XOFF
|
|
characters have changed; propagate these changes to the card.
|
|
------------------------------------------------------------------ */
|
|
|
|
fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
|
|
}
|
|
|
|
} /* End epcaparam */
|
|
|
|
/* --------------------- Begin receive_data ----------------------- */
|
|
|
|
static void receive_data(struct channel *ch)
|
|
{ /* Begin receive_data */
|
|
|
|
unchar *rptr;
|
|
struct termios *ts = NULL;
|
|
struct tty_struct *tty;
|
|
volatile struct board_chan *bc;
|
|
register int dataToRead, wrapgap, bytesAvailable;
|
|
register unsigned int tail, head;
|
|
unsigned int wrapmask;
|
|
int rc;
|
|
|
|
|
|
/* ---------------------------------------------------------------
|
|
This routine is called by doint when a receive data event
|
|
has taken place.
|
|
------------------------------------------------------------------- */
|
|
|
|
globalwinon(ch);
|
|
|
|
if (ch->statusflags & RXSTOPPED)
|
|
return;
|
|
|
|
tty = ch->tty;
|
|
if (tty)
|
|
ts = tty->termios;
|
|
|
|
bc = ch->brdchan;
|
|
|
|
if (!bc)
|
|
{
|
|
printk(KERN_ERR "<Error> - bc is NULL in receive_data!\n");
|
|
return;
|
|
}
|
|
|
|
wrapmask = ch->rxbufsize - 1;
|
|
|
|
/* ---------------------------------------------------------------------
|
|
Get the head and tail pointers to the receiver queue. Wrap the
|
|
head pointer if it has reached the end of the buffer.
|
|
------------------------------------------------------------------------ */
|
|
|
|
head = bc->rin;
|
|
head &= wrapmask;
|
|
tail = bc->rout & wrapmask;
|
|
|
|
bytesAvailable = (head - tail) & wrapmask;
|
|
|
|
if (bytesAvailable == 0)
|
|
return;
|
|
|
|
/* ------------------------------------------------------------------
|
|
If CREAD bit is off or device not open, set TX tail to head
|
|
--------------------------------------------------------------------- */
|
|
|
|
if (!tty || !ts || !(ts->c_cflag & CREAD))
|
|
{
|
|
bc->rout = head;
|
|
return;
|
|
}
|
|
|
|
if (tty->flip.count == TTY_FLIPBUF_SIZE)
|
|
return;
|
|
|
|
if (bc->orun)
|
|
{
|
|
bc->orun = 0;
|
|
printk(KERN_WARNING "overrun! DigiBoard device %s\n",tty->name);
|
|
}
|
|
|
|
rxwinon(ch);
|
|
rptr = tty->flip.char_buf_ptr;
|
|
rc = tty->flip.count;
|
|
|
|
while (bytesAvailable > 0)
|
|
{ /* Begin while there is data on the card */
|
|
|
|
wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail;
|
|
|
|
/* ---------------------------------------------------------------
|
|
Even if head has wrapped around only report the amount of
|
|
data to be equal to the size - tail. Remember memcpy can't
|
|
automaticly wrap around the receive buffer.
|
|
----------------------------------------------------------------- */
|
|
|
|
dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable;
|
|
|
|
/* --------------------------------------------------------------
|
|
Make sure we don't overflow the buffer
|
|
----------------------------------------------------------------- */
|
|
|
|
if ((rc + dataToRead) > TTY_FLIPBUF_SIZE)
|
|
dataToRead = TTY_FLIPBUF_SIZE - rc;
|
|
|
|
if (dataToRead == 0)
|
|
break;
|
|
|
|
/* ---------------------------------------------------------------
|
|
Move data read from our card into the line disciplines buffer
|
|
for translation if necessary.
|
|
------------------------------------------------------------------ */
|
|
|
|
if ((memcpy(rptr, ch->rxptr + tail, dataToRead)) != rptr)
|
|
printk(KERN_ERR "<Error> - receive_data : memcpy failed\n");
|
|
|
|
rc += dataToRead;
|
|
rptr += dataToRead;
|
|
tail = (tail + dataToRead) & wrapmask;
|
|
bytesAvailable -= dataToRead;
|
|
|
|
} /* End while there is data on the card */
|
|
|
|
|
|
tty->flip.count = rc;
|
|
tty->flip.char_buf_ptr = rptr;
|
|
globalwinon(ch);
|
|
bc->rout = tail;
|
|
|
|
/* Must be called with global data */
|
|
tty_schedule_flip(ch->tty);
|
|
return;
|
|
|
|
} /* End receive_data */
|
|
|
|
static int info_ioctl(struct tty_struct *tty, struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd)
|
|
{ /* Begin switch cmd */
|
|
|
|
case DIGI_GETINFO:
|
|
{ /* Begin case DIGI_GETINFO */
|
|
|
|
struct digi_info di ;
|
|
int brd;
|
|
|
|
getUser(brd, (unsigned int __user *)arg);
|
|
|
|
if ((brd < 0) || (brd >= num_cards) || (num_cards == 0))
|
|
return (-ENODEV);
|
|
|
|
memset(&di, 0, sizeof(di));
|
|
|
|
di.board = brd ;
|
|
di.status = boards[brd].status;
|
|
di.type = boards[brd].type ;
|
|
di.numports = boards[brd].numports ;
|
|
di.port = boards[brd].port ;
|
|
di.membase = boards[brd].membase ;
|
|
|
|
if (copy_to_user((void __user *)arg, &di, sizeof (di)))
|
|
return -EFAULT;
|
|
break;
|
|
|
|
} /* End case DIGI_GETINFO */
|
|
|
|
case DIGI_POLLER:
|
|
{ /* Begin case DIGI_POLLER */
|
|
|
|
int brd = arg & 0xff000000 >> 16 ;
|
|
unsigned char state = arg & 0xff ;
|
|
|
|
if ((brd < 0) || (brd >= num_cards))
|
|
{
|
|
printk(KERN_ERR "<Error> - DIGI POLLER : brd not valid!\n");
|
|
return (-ENODEV);
|
|
}
|
|
|
|
digi_poller_inhibited = state ;
|
|
break ;
|
|
|
|
} /* End case DIGI_POLLER */
|
|
|
|
case DIGI_INIT:
|
|
{ /* Begin case DIGI_INIT */
|
|
|
|
/* ------------------------------------------------------------
|
|
This call is made by the apps to complete the initilization
|
|
of the board(s). This routine is responsible for setting
|
|
the card to its initial state and setting the drivers control
|
|
fields to the sutianle settings for the card in question.
|
|
---------------------------------------------------------------- */
|
|
|
|
int crd ;
|
|
for (crd = 0; crd < num_cards; crd++)
|
|
post_fep_init (crd);
|
|
|
|
break ;
|
|
|
|
} /* End case DIGI_INIT */
|
|
|
|
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
|
|
} /* End switch cmd */
|
|
return (0) ;
|
|
}
|
|
/* --------------------- Begin pc_ioctl ----------------------- */
|
|
|
|
static int pc_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct channel *ch = (struct channel *) tty->driver_data;
|
|
volatile struct board_chan *bc;
|
|
unsigned int mstat, mflag = 0;
|
|
unsigned long flags;
|
|
|
|
if (ch)
|
|
bc = ch->brdchan;
|
|
else
|
|
{
|
|
printk(KERN_ERR "<Error> - ch is NULL in pc_tiocmget!\n");
|
|
return(-EINVAL);
|
|
}
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
mstat = bc->mstat;
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
if (mstat & ch->m_dtr)
|
|
mflag |= TIOCM_DTR;
|
|
|
|
if (mstat & ch->m_rts)
|
|
mflag |= TIOCM_RTS;
|
|
|
|
if (mstat & ch->m_cts)
|
|
mflag |= TIOCM_CTS;
|
|
|
|
if (mstat & ch->dsr)
|
|
mflag |= TIOCM_DSR;
|
|
|
|
if (mstat & ch->m_ri)
|
|
mflag |= TIOCM_RI;
|
|
|
|
if (mstat & ch->dcd)
|
|
mflag |= TIOCM_CD;
|
|
|
|
return mflag;
|
|
}
|
|
|
|
static int pc_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct channel *ch = (struct channel *) tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (!ch) {
|
|
printk(KERN_ERR "<Error> - ch is NULL in pc_tiocmset!\n");
|
|
return(-EINVAL);
|
|
}
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
/*
|
|
* I think this modemfake stuff is broken. It doesn't
|
|
* correctly reflect the behaviour desired by the TIOCM*
|
|
* ioctls. Therefore this is probably broken.
|
|
*/
|
|
if (set & TIOCM_RTS) {
|
|
ch->modemfake |= ch->m_rts;
|
|
ch->modem |= ch->m_rts;
|
|
}
|
|
if (set & TIOCM_DTR) {
|
|
ch->modemfake |= ch->m_dtr;
|
|
ch->modem |= ch->m_dtr;
|
|
}
|
|
if (clear & TIOCM_RTS) {
|
|
ch->modemfake |= ch->m_rts;
|
|
ch->modem &= ~ch->m_rts;
|
|
}
|
|
if (clear & TIOCM_DTR) {
|
|
ch->modemfake |= ch->m_dtr;
|
|
ch->modem &= ~ch->m_dtr;
|
|
}
|
|
|
|
globalwinon(ch);
|
|
|
|
/* --------------------------------------------------------------
|
|
The below routine generally sets up parity, baud, flow control
|
|
issues, etc.... It effect both control flags and input flags.
|
|
------------------------------------------------------------------ */
|
|
|
|
epcaparam(tty,ch);
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
return 0;
|
|
}
|
|
|
|
static int pc_ioctl(struct tty_struct *tty, struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{ /* Begin pc_ioctl */
|
|
|
|
digiflow_t dflow;
|
|
int retval;
|
|
unsigned long flags;
|
|
unsigned int mflag, mstat;
|
|
unsigned char startc, stopc;
|
|
volatile struct board_chan *bc;
|
|
struct channel *ch = (struct channel *) tty->driver_data;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
if (ch)
|
|
bc = ch->brdchan;
|
|
else
|
|
{
|
|
printk(KERN_ERR "<Error> - ch is NULL in pc_ioctl!\n");
|
|
return(-EINVAL);
|
|
}
|
|
|
|
save_flags(flags);
|
|
|
|
/* -------------------------------------------------------------------
|
|
For POSIX compliance we need to add more ioctls. See tty_ioctl.c
|
|
in /usr/src/linux/drivers/char for a good example. In particular
|
|
think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS.
|
|
---------------------------------------------------------------------- */
|
|
|
|
switch (cmd)
|
|
{ /* Begin switch cmd */
|
|
|
|
case TCGETS:
|
|
if (copy_to_user(argp,
|
|
tty->termios, sizeof(struct termios)))
|
|
return -EFAULT;
|
|
return(0);
|
|
|
|
case TCGETA:
|
|
return get_termio(tty, argp);
|
|
|
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
|
|
|
retval = tty_check_change(tty);
|
|
if (retval)
|
|
return retval;
|
|
|
|
/* Setup an event to indicate when the transmit buffer empties */
|
|
|
|
setup_empty_event(tty,ch);
|
|
tty_wait_until_sent(tty, 0);
|
|
if (!arg)
|
|
digi_send_break(ch, HZ/4); /* 1/4 second */
|
|
return 0;
|
|
|
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
|
|
|
retval = tty_check_change(tty);
|
|
if (retval)
|
|
return retval;
|
|
|
|
/* Setup an event to indicate when the transmit buffer empties */
|
|
|
|
setup_empty_event(tty,ch);
|
|
tty_wait_until_sent(tty, 0);
|
|
digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4);
|
|
return 0;
|
|
|
|
case TIOCGSOFTCAR:
|
|
if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case TIOCSSOFTCAR:
|
|
{
|
|
unsigned int value;
|
|
|
|
if (get_user(value, (unsigned __user *)argp))
|
|
return -EFAULT;
|
|
tty->termios->c_cflag =
|
|
((tty->termios->c_cflag & ~CLOCAL) |
|
|
(value ? CLOCAL : 0));
|
|
return 0;
|
|
}
|
|
|
|
case TIOCMODG:
|
|
mflag = pc_tiocmget(tty, file);
|
|
if (put_user(mflag, (unsigned long __user *)argp))
|
|
return -EFAULT;
|
|
break;
|
|
|
|
case TIOCMODS:
|
|
if (get_user(mstat, (unsigned __user *)argp))
|
|
return -EFAULT;
|
|
return pc_tiocmset(tty, file, mstat, ~mstat);
|
|
|
|
case TIOCSDTR:
|
|
ch->omodem |= ch->m_dtr;
|
|
cli();
|
|
globalwinon(ch);
|
|
fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1);
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
break;
|
|
|
|
case TIOCCDTR:
|
|
ch->omodem &= ~ch->m_dtr;
|
|
cli();
|
|
globalwinon(ch);
|
|
fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1);
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
break;
|
|
|
|
case DIGI_GETA:
|
|
if (copy_to_user(argp, &ch->digiext, sizeof(digi_t)))
|
|
return -EFAULT;
|
|
break;
|
|
|
|
case DIGI_SETAW:
|
|
case DIGI_SETAF:
|
|
if ((cmd) == (DIGI_SETAW))
|
|
{
|
|
/* Setup an event to indicate when the transmit buffer empties */
|
|
|
|
setup_empty_event(tty,ch);
|
|
tty_wait_until_sent(tty, 0);
|
|
}
|
|
else
|
|
{
|
|
/* ldisc lock already held in ioctl */
|
|
if (tty->ldisc.flush_buffer)
|
|
tty->ldisc.flush_buffer(tty);
|
|
}
|
|
|
|
/* Fall Thru */
|
|
|
|
case DIGI_SETA:
|
|
if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
|
|
return -EFAULT;
|
|
|
|
if (ch->digiext.digi_flags & DIGI_ALTPIN)
|
|
{
|
|
ch->dcd = ch->m_dsr;
|
|
ch->dsr = ch->m_dcd;
|
|
}
|
|
else
|
|
{
|
|
ch->dcd = ch->m_dcd;
|
|
ch->dsr = ch->m_dsr;
|
|
}
|
|
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
/* -----------------------------------------------------------------
|
|
The below routine generally sets up parity, baud, flow control
|
|
issues, etc.... It effect both control flags and input flags.
|
|
------------------------------------------------------------------- */
|
|
|
|
epcaparam(tty,ch);
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
break;
|
|
|
|
case DIGI_GETFLOW:
|
|
case DIGI_GETAFLOW:
|
|
cli();
|
|
globalwinon(ch);
|
|
if ((cmd) == (DIGI_GETFLOW))
|
|
{
|
|
dflow.startc = bc->startc;
|
|
dflow.stopc = bc->stopc;
|
|
}
|
|
else
|
|
{
|
|
dflow.startc = bc->startca;
|
|
dflow.stopc = bc->stopca;
|
|
}
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
if (copy_to_user(argp, &dflow, sizeof(dflow)))
|
|
return -EFAULT;
|
|
break;
|
|
|
|
case DIGI_SETAFLOW:
|
|
case DIGI_SETFLOW:
|
|
if ((cmd) == (DIGI_SETFLOW))
|
|
{
|
|
startc = ch->startc;
|
|
stopc = ch->stopc;
|
|
}
|
|
else
|
|
{
|
|
startc = ch->startca;
|
|
stopc = ch->stopca;
|
|
}
|
|
|
|
if (copy_from_user(&dflow, argp, sizeof(dflow)))
|
|
return -EFAULT;
|
|
|
|
if (dflow.startc != startc || dflow.stopc != stopc)
|
|
{ /* Begin if setflow toggled */
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
if ((cmd) == (DIGI_SETFLOW))
|
|
{
|
|
ch->fepstartc = ch->startc = dflow.startc;
|
|
ch->fepstopc = ch->stopc = dflow.stopc;
|
|
fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
|
|
}
|
|
else
|
|
{
|
|
ch->fepstartca = ch->startca = dflow.startc;
|
|
ch->fepstopca = ch->stopca = dflow.stopc;
|
|
fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
|
|
}
|
|
|
|
if (ch->statusflags & TXSTOPPED)
|
|
pc_start(tty);
|
|
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
} /* End if setflow toggled */
|
|
break;
|
|
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
|
|
} /* End switch cmd */
|
|
|
|
return 0;
|
|
|
|
} /* End pc_ioctl */
|
|
|
|
/* --------------------- Begin pc_set_termios ----------------------- */
|
|
|
|
static void pc_set_termios(struct tty_struct *tty, struct termios *old_termios)
|
|
{ /* Begin pc_set_termios */
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if channel valid */
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
epcaparam(tty, ch);
|
|
memoff(ch);
|
|
|
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
|
((tty->termios->c_cflag & CRTSCTS) == 0))
|
|
tty->hw_stopped = 0;
|
|
|
|
if (!(old_termios->c_cflag & CLOCAL) &&
|
|
(tty->termios->c_cflag & CLOCAL))
|
|
wake_up_interruptible(&ch->open_wait);
|
|
|
|
restore_flags(flags);
|
|
|
|
} /* End if channel valid */
|
|
|
|
} /* End pc_set_termios */
|
|
|
|
/* --------------------- Begin do_softint ----------------------- */
|
|
|
|
static void do_softint(void *private_)
|
|
{ /* Begin do_softint */
|
|
|
|
struct channel *ch = (struct channel *) private_;
|
|
|
|
|
|
/* Called in response to a modem change event */
|
|
|
|
if (ch && ch->magic == EPCA_MAGIC)
|
|
{ /* Begin EPCA_MAGIC */
|
|
|
|
struct tty_struct *tty = ch->tty;
|
|
|
|
if (tty && tty->driver_data)
|
|
{
|
|
if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event))
|
|
{ /* Begin if clear_bit */
|
|
|
|
tty_hangup(tty); /* FIXME: module removal race here - AKPM */
|
|
wake_up_interruptible(&ch->open_wait);
|
|
ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
|
|
|
|
} /* End if clear_bit */
|
|
}
|
|
|
|
} /* End EPCA_MAGIC */
|
|
} /* End do_softint */
|
|
|
|
/* ------------------------------------------------------------
|
|
pc_stop and pc_start provide software flow control to the
|
|
routine and the pc_ioctl routine.
|
|
---------------------------------------------------------------- */
|
|
|
|
/* --------------------- Begin pc_stop ----------------------- */
|
|
|
|
static void pc_stop(struct tty_struct *tty)
|
|
{ /* Begin pc_stop */
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if valid channel */
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
if ((ch->statusflags & TXSTOPPED) == 0)
|
|
{ /* Begin if transmit stop requested */
|
|
|
|
globalwinon(ch);
|
|
|
|
/* STOP transmitting now !! */
|
|
|
|
fepcmd(ch, PAUSETX, 0, 0, 0, 0);
|
|
|
|
ch->statusflags |= TXSTOPPED;
|
|
memoff(ch);
|
|
|
|
} /* End if transmit stop requested */
|
|
|
|
restore_flags(flags);
|
|
|
|
} /* End if valid channel */
|
|
|
|
} /* End pc_stop */
|
|
|
|
/* --------------------- Begin pc_start ----------------------- */
|
|
|
|
static void pc_start(struct tty_struct *tty)
|
|
{ /* Begin pc_start */
|
|
|
|
struct channel *ch;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if channel valid */
|
|
|
|
unsigned long flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
/* Just in case output was resumed because of a change in Digi-flow */
|
|
if (ch->statusflags & TXSTOPPED)
|
|
{ /* Begin transmit resume requested */
|
|
|
|
volatile struct board_chan *bc;
|
|
|
|
globalwinon(ch);
|
|
bc = ch->brdchan;
|
|
if (ch->statusflags & LOWWAIT)
|
|
bc->ilow = 1;
|
|
|
|
/* Okay, you can start transmitting again... */
|
|
|
|
fepcmd(ch, RESUMETX, 0, 0, 0, 0);
|
|
|
|
ch->statusflags &= ~TXSTOPPED;
|
|
memoff(ch);
|
|
|
|
} /* End transmit resume requested */
|
|
|
|
restore_flags(flags);
|
|
|
|
} /* End if channel valid */
|
|
|
|
} /* End pc_start */
|
|
|
|
/* ------------------------------------------------------------------
|
|
The below routines pc_throttle and pc_unthrottle are used
|
|
to slow (And resume) the receipt of data into the kernels
|
|
receive buffers. The exact occurrence of this depends on the
|
|
size of the kernels receive buffer and what the 'watermarks'
|
|
are set to for that buffer. See the n_ttys.c file for more
|
|
details.
|
|
______________________________________________________________________ */
|
|
/* --------------------- Begin throttle ----------------------- */
|
|
|
|
static void pc_throttle(struct tty_struct * tty)
|
|
{ /* Begin pc_throttle */
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if channel valid */
|
|
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
if ((ch->statusflags & RXSTOPPED) == 0)
|
|
{
|
|
globalwinon(ch);
|
|
fepcmd(ch, PAUSERX, 0, 0, 0, 0);
|
|
|
|
ch->statusflags |= RXSTOPPED;
|
|
memoff(ch);
|
|
}
|
|
restore_flags(flags);
|
|
|
|
} /* End if channel valid */
|
|
|
|
} /* End pc_throttle */
|
|
|
|
/* --------------------- Begin unthrottle ----------------------- */
|
|
|
|
static void pc_unthrottle(struct tty_struct *tty)
|
|
{ /* Begin pc_unthrottle */
|
|
|
|
struct channel *ch;
|
|
unsigned long flags;
|
|
volatile struct board_chan *bc;
|
|
|
|
|
|
/* ---------------------------------------------------------
|
|
verifyChannel returns the channel from the tty struct
|
|
if it is valid. This serves as a sanity check.
|
|
------------------------------------------------------------- */
|
|
|
|
if ((ch = verifyChannel(tty)) != NULL)
|
|
{ /* Begin if channel valid */
|
|
|
|
|
|
/* Just in case output was resumed because of a change in Digi-flow */
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
if (ch->statusflags & RXSTOPPED)
|
|
{
|
|
|
|
globalwinon(ch);
|
|
bc = ch->brdchan;
|
|
fepcmd(ch, RESUMERX, 0, 0, 0, 0);
|
|
|
|
ch->statusflags &= ~RXSTOPPED;
|
|
memoff(ch);
|
|
}
|
|
restore_flags(flags);
|
|
|
|
} /* End if channel valid */
|
|
|
|
} /* End pc_unthrottle */
|
|
|
|
/* --------------------- Begin digi_send_break ----------------------- */
|
|
|
|
void digi_send_break(struct channel *ch, int msec)
|
|
{ /* Begin digi_send_break */
|
|
|
|
unsigned long flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
|
|
/* --------------------------------------------------------------------
|
|
Maybe I should send an infinite break here, schedule() for
|
|
msec amount of time, and then stop the break. This way,
|
|
the user can't screw up the FEP by causing digi_send_break()
|
|
to be called (i.e. via an ioctl()) more than once in msec amount
|
|
of time. Try this for now...
|
|
------------------------------------------------------------------------ */
|
|
|
|
fepcmd(ch, SENDBREAK, msec, 0, 10, 0);
|
|
memoff(ch);
|
|
|
|
restore_flags(flags);
|
|
|
|
} /* End digi_send_break */
|
|
|
|
/* --------------------- Begin setup_empty_event ----------------------- */
|
|
|
|
static void setup_empty_event(struct tty_struct *tty, struct channel *ch)
|
|
{ /* Begin setup_empty_event */
|
|
|
|
volatile struct board_chan *bc = ch->brdchan;
|
|
unsigned long int flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
globalwinon(ch);
|
|
ch->statusflags |= EMPTYWAIT;
|
|
|
|
/* ------------------------------------------------------------------
|
|
When set the iempty flag request a event to be generated when the
|
|
transmit buffer is empty (If there is no BREAK in progress).
|
|
--------------------------------------------------------------------- */
|
|
|
|
bc->iempty = 1;
|
|
memoff(ch);
|
|
restore_flags(flags);
|
|
|
|
} /* End setup_empty_event */
|
|
|
|
/* --------------------- Begin get_termio ----------------------- */
|
|
|
|
static int get_termio(struct tty_struct * tty, struct termio __user * termio)
|
|
{ /* Begin get_termio */
|
|
return kernel_termios_to_user_termio(termio, tty->termios);
|
|
} /* End get_termio */
|
|
/* ---------------------- Begin epca_setup -------------------------- */
|
|
void epca_setup(char *str, int *ints)
|
|
{ /* Begin epca_setup */
|
|
|
|
struct board_info board;
|
|
int index, loop, last;
|
|
char *temp, *t2;
|
|
unsigned len;
|
|
|
|
/* ----------------------------------------------------------------------
|
|
If this routine looks a little strange it is because it is only called
|
|
if a LILO append command is given to boot the kernel with parameters.
|
|
In this way, we can provide the user a method of changing his board
|
|
configuration without rebuilding the kernel.
|
|
----------------------------------------------------------------------- */
|
|
if (!liloconfig)
|
|
liloconfig = 1;
|
|
|
|
memset(&board, 0, sizeof(board));
|
|
|
|
/* Assume the data is int first, later we can change it */
|
|
/* I think that array position 0 of ints holds the number of args */
|
|
for (last = 0, index = 1; index <= ints[0]; index++)
|
|
switch(index)
|
|
{ /* Begin parse switch */
|
|
|
|
case 1:
|
|
board.status = ints[index];
|
|
|
|
/* ---------------------------------------------------------
|
|
We check for 2 (As opposed to 1; because 2 is a flag
|
|
instructing the driver to ignore epcaconfig.) For this
|
|
reason we check for 2.
|
|
------------------------------------------------------------ */
|
|
if (board.status == 2)
|
|
{ /* Begin ignore epcaconfig as well as lilo cmd line */
|
|
nbdevs = 0;
|
|
num_cards = 0;
|
|
return;
|
|
} /* End ignore epcaconfig as well as lilo cmd line */
|
|
|
|
if (board.status > 2)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid board status 0x%x\n", board.status);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_BOARD_STATUS;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 2:
|
|
board.type = ints[index];
|
|
if (board.type >= PCIXEM)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid board type 0x%x\n", board.type);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_BOARD_TYPE;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 3:
|
|
board.altpin = ints[index];
|
|
if (board.altpin > 1)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid board altpin 0x%x\n", board.altpin);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_ALTPIN;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 4:
|
|
board.numports = ints[index];
|
|
if ((board.numports < 2) || (board.numports > 256))
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid board numports 0x%x\n", board.numports);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_NUM_PORTS;
|
|
return;
|
|
}
|
|
nbdevs += board.numports;
|
|
last = index;
|
|
break;
|
|
|
|
case 5:
|
|
board.port = (unsigned char *)ints[index];
|
|
if (ints[index] <= 0)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_PORT_BASE;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 6:
|
|
board.membase = (unsigned char *)ints[index];
|
|
if (ints[index] <= 0)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_MEM_BASE;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n");
|
|
return;
|
|
|
|
} /* End parse switch */
|
|
|
|
while (str && *str)
|
|
{ /* Begin while there is a string arg */
|
|
|
|
/* find the next comma or terminator */
|
|
temp = str;
|
|
|
|
/* While string is not null, and a comma hasn't been found */
|
|
while (*temp && (*temp != ','))
|
|
temp++;
|
|
|
|
if (!*temp)
|
|
temp = NULL;
|
|
else
|
|
*temp++ = 0;
|
|
|
|
/* Set index to the number of args + 1 */
|
|
index = last + 1;
|
|
|
|
switch(index)
|
|
{
|
|
case 1:
|
|
len = strlen(str);
|
|
if (strncmp("Disable", str, len) == 0)
|
|
board.status = 0;
|
|
else
|
|
if (strncmp("Enable", str, len) == 0)
|
|
board.status = 1;
|
|
else
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid status %s\n", str);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_BOARD_STATUS;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 2:
|
|
|
|
for(loop = 0; loop < EPCA_NUM_TYPES; loop++)
|
|
if (strcmp(board_desc[loop], str) == 0)
|
|
break;
|
|
|
|
|
|
/* ---------------------------------------------------------------
|
|
If the index incremented above refers to a legitamate board
|
|
type set it here.
|
|
------------------------------------------------------------------*/
|
|
|
|
if (index < EPCA_NUM_TYPES)
|
|
board.type = loop;
|
|
else
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid board type: %s\n", str);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_BOARD_TYPE;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 3:
|
|
len = strlen(str);
|
|
if (strncmp("Disable", str, len) == 0)
|
|
board.altpin = 0;
|
|
else
|
|
if (strncmp("Enable", str, len) == 0)
|
|
board.altpin = 1;
|
|
else
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid altpin %s\n", str);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_ALTPIN;
|
|
return;
|
|
}
|
|
last = index;
|
|
break;
|
|
|
|
case 4:
|
|
t2 = str;
|
|
while (isdigit(*t2))
|
|
t2++;
|
|
|
|
if (*t2)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid port count %s\n", str);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_NUM_PORTS;
|
|
return;
|
|
}
|
|
|
|
/* ------------------------------------------------------------
|
|
There is not a man page for simple_strtoul but the code can be
|
|
found in vsprintf.c. The first argument is the string to
|
|
translate (To an unsigned long obviously), the second argument
|
|
can be the address of any character variable or a NULL. If a
|
|
variable is given, the end pointer of the string will be stored
|
|
in that variable; if a NULL is given the end pointer will
|
|
not be returned. The last argument is the base to use. If
|
|
a 0 is indicated, the routine will attempt to determine the
|
|
proper base by looking at the values prefix (A '0' for octal,
|
|
a 'x' for hex, etc ... If a value is given it will use that
|
|
value as the base.
|
|
---------------------------------------------------------------- */
|
|
board.numports = simple_strtoul(str, NULL, 0);
|
|
nbdevs += board.numports;
|
|
last = index;
|
|
break;
|
|
|
|
case 5:
|
|
t2 = str;
|
|
while (isxdigit(*t2))
|
|
t2++;
|
|
|
|
if (*t2)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid i/o address %s\n", str);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_PORT_BASE;
|
|
return;
|
|
}
|
|
|
|
board.port = (unsigned char *)simple_strtoul(str, NULL, 16);
|
|
last = index;
|
|
break;
|
|
|
|
case 6:
|
|
t2 = str;
|
|
while (isxdigit(*t2))
|
|
t2++;
|
|
|
|
if (*t2)
|
|
{
|
|
printk(KERN_ERR "<Error> - epca_setup: Invalid memory base %s\n",str);
|
|
invalid_lilo_config = 1;
|
|
setup_error_code |= INVALID_MEM_BASE;
|
|
return;
|
|
}
|
|
|
|
board.membase = (unsigned char *)simple_strtoul(str, NULL, 16);
|
|
last = index;
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "PC/Xx: Too many string parms\n");
|
|
return;
|
|
}
|
|
str = temp;
|
|
|
|
} /* End while there is a string arg */
|
|
|
|
|
|
if (last < 6)
|
|
{
|
|
printk(KERN_ERR "PC/Xx: Insufficient parms specified\n");
|
|
return;
|
|
}
|
|
|
|
/* I should REALLY validate the stuff here */
|
|
|
|
/* Copies our local copy of board into boards */
|
|
memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board));
|
|
|
|
|
|
/* Does this get called once per lilo arg are what ? */
|
|
|
|
printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n",
|
|
num_cards, board_desc[board.type],
|
|
board.numports, (int)board.port, (unsigned int) board.membase);
|
|
|
|
num_cards++;
|
|
|
|
} /* End epca_setup */
|
|
|
|
|
|
|
|
#ifdef ENABLE_PCI
|
|
/* ------------------------ Begin init_PCI --------------------------- */
|
|
|
|
enum epic_board_types {
|
|
brd_xr = 0,
|
|
brd_xem,
|
|
brd_cx,
|
|
brd_xrj,
|
|
};
|
|
|
|
|
|
/* indexed directly by epic_board_types enum */
|
|
static struct {
|
|
unsigned char board_type;
|
|
unsigned bar_idx; /* PCI base address region */
|
|
} epca_info_tbl[] = {
|
|
{ PCIXR, 0, },
|
|
{ PCIXEM, 0, },
|
|
{ PCICX, 0, },
|
|
{ PCIXRJ, 2, },
|
|
};
|
|
|
|
|
|
static int __devinit epca_init_one (struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
static int board_num = -1;
|
|
int board_idx, info_idx = ent->driver_data;
|
|
unsigned long addr;
|
|
|
|
if (pci_enable_device(pdev))
|
|
return -EIO;
|
|
|
|
board_num++;
|
|
board_idx = board_num + num_cards;
|
|
if (board_idx >= MAXBOARDS)
|
|
goto err_out;
|
|
|
|
addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx);
|
|
if (!addr) {
|
|
printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n",
|
|
epca_info_tbl[info_idx].bar_idx);
|
|
goto err_out;
|
|
}
|
|
|
|
boards[board_idx].status = ENABLED;
|
|
boards[board_idx].type = epca_info_tbl[info_idx].board_type;
|
|
boards[board_idx].numports = 0x0;
|
|
boards[board_idx].port =
|
|
(unsigned char *)((char *) addr + PCI_IO_OFFSET);
|
|
boards[board_idx].membase =
|
|
(unsigned char *)((char *) addr);
|
|
|
|
if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) {
|
|
printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n",
|
|
0x200000, addr + PCI_IO_OFFSET);
|
|
goto err_out;
|
|
}
|
|
|
|
boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000);
|
|
if (!boards[board_idx].re_map_port) {
|
|
printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n",
|
|
0x200000, addr + PCI_IO_OFFSET);
|
|
goto err_out_free_pciio;
|
|
}
|
|
|
|
if (!request_mem_region (addr, 0x200000, "epca")) {
|
|
printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n",
|
|
0x200000, addr);
|
|
goto err_out_free_iounmap;
|
|
}
|
|
|
|
boards[board_idx].re_map_membase = ioremap(addr, 0x200000);
|
|
if (!boards[board_idx].re_map_membase) {
|
|
printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n",
|
|
0x200000, addr + PCI_IO_OFFSET);
|
|
goto err_out_free_memregion;
|
|
}
|
|
|
|
/* --------------------------------------------------------------
|
|
I don't know what the below does, but the hardware guys say
|
|
its required on everything except PLX (In this case XRJ).
|
|
---------------------------------------------------------------- */
|
|
if (info_idx != brd_xrj) {
|
|
pci_write_config_byte(pdev, 0x40, 0);
|
|
pci_write_config_byte(pdev, 0x46, 0);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out_free_memregion:
|
|
release_mem_region (addr, 0x200000);
|
|
err_out_free_iounmap:
|
|
iounmap (boards[board_idx].re_map_port);
|
|
err_out_free_pciio:
|
|
release_mem_region (addr + PCI_IO_OFFSET, 0x200000);
|
|
err_out:
|
|
return -ENODEV;
|
|
}
|
|
|
|
|
|
static struct pci_device_id epca_pci_tbl[] = {
|
|
{ PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr },
|
|
{ PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem },
|
|
{ PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx },
|
|
{ PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, epca_pci_tbl);
|
|
|
|
int __init init_PCI (void)
|
|
{ /* Begin init_PCI */
|
|
memset (&epca_driver, 0, sizeof (epca_driver));
|
|
epca_driver.name = "epca";
|
|
epca_driver.id_table = epca_pci_tbl;
|
|
epca_driver.probe = epca_init_one;
|
|
|
|
return pci_register_driver(&epca_driver);
|
|
} /* End init_PCI */
|
|
|
|
#endif /* ENABLE_PCI */
|
|
|
|
MODULE_LICENSE("GPL");
|