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5cbded585d
Run this: #!/bin/sh for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do echo "De-casting $f..." perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f done And then go through and reinstate those cases where code is casting pointers to non-pointers. And then drop a few hunks which conflicted with outstanding work. Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Karsten Keil <kkeil@suse.de> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Ian Kent <raven@themaw.net> Cc: Steven French <sfrench@us.ibm.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1094 lines
29 KiB
C
1094 lines
29 KiB
C
/*
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* pc300_tty.c Cyclades-PC300(tm) TTY Driver.
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*
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* Author: Regina Kodato <reginak@cyclades.com>
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*
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* Copyright: (c) 1999-2002 Cyclades Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* $Log: pc300_tty.c,v $
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* Revision 3.7 2002/03/07 14:17:09 henrique
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* License data fixed
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*
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* Revision 3.6 2001/12/10 12:29:42 regina
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* Fix the MLPPP bug
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*
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* Revision 3.5 2001/10/31 11:20:05 regina
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* automatic pppd starts
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*
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* Revision 3.4 2001/08/06 12:01:51 regina
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* problem in DSR_DE bit
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*
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* Revision 3.3 2001/07/26 22:58:41 regina
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* update EDA value
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*
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* Revision 3.2 2001/07/12 13:11:20 regina
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* bug fix - DCD-OFF in pc300 tty driver
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*
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* DMA transmission bug fix
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*
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* Revision 3.1 2001/06/22 13:13:02 regina
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* MLPPP implementation
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/if.h>
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#include <linux/skbuff.h>
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/* TTY includes */
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include "pc300.h"
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/* defines and macros */
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/* TTY Global definitions */
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#define CPC_TTY_NPORTS 8 /* maximum number of the sync tty connections */
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#define CPC_TTY_MAJOR CYCLADES_MAJOR
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#define CPC_TTY_MINOR_START 240 /* minor of the first PC300 interface */
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#define CPC_TTY_MAX_MTU 2000
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/* tty interface state */
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#define CPC_TTY_ST_IDLE 0
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#define CPC_TTY_ST_INIT 1 /* configured with MLPPP and up */
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#define CPC_TTY_ST_OPEN 2 /* opened by application */
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#define CPC_TTY_LOCK(card,flags)\
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do {\
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spin_lock_irqsave(&card->card_lock, flags); \
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} while (0)
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#define CPC_TTY_UNLOCK(card,flags) \
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do {\
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spin_unlock_irqrestore(&card->card_lock, flags); \
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} while (0)
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//#define CPC_TTY_DBG(format,a...) printk(format,##a)
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#define CPC_TTY_DBG(format,a...)
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/* data structures */
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typedef struct _st_cpc_rx_buf {
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struct _st_cpc_rx_buf *next;
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int size;
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unsigned char data[1];
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} st_cpc_rx_buf;
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struct st_cpc_rx_list {
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st_cpc_rx_buf *first;
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st_cpc_rx_buf *last;
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};
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typedef struct _st_cpc_tty_area {
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int state; /* state of the TTY interface */
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int num_open;
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unsigned int tty_minor; /* minor this interface */
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volatile struct st_cpc_rx_list buf_rx; /* ptr. to reception buffer */
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unsigned char* buf_tx; /* ptr. to transmission buffer */
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pc300dev_t* pc300dev; /* ptr. to info struct in PC300 driver */
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unsigned char name[20]; /* interf. name + "-tty" */
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struct tty_struct *tty;
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struct work_struct tty_tx_work; /* tx work - tx interrupt */
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struct work_struct tty_rx_work; /* rx work - rx interrupt */
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} st_cpc_tty_area;
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/* TTY data structures */
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static struct tty_driver serial_drv;
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/* local variables */
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static st_cpc_tty_area cpc_tty_area[CPC_TTY_NPORTS];
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static int cpc_tty_cnt = 0; /* number of intrfaces configured with MLPPP */
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static int cpc_tty_unreg_flag = 0;
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/* TTY functions prototype */
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static int cpc_tty_open(struct tty_struct *tty, struct file *flip);
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static void cpc_tty_close(struct tty_struct *tty, struct file *flip);
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static int cpc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count);
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static int cpc_tty_write_room(struct tty_struct *tty);
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static int cpc_tty_chars_in_buffer(struct tty_struct *tty);
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static void cpc_tty_flush_buffer(struct tty_struct *tty);
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static void cpc_tty_hangup(struct tty_struct *tty);
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static void cpc_tty_rx_work(struct work_struct *work);
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static void cpc_tty_tx_work(struct work_struct *work);
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static int cpc_tty_send_to_card(pc300dev_t *dev,void *buf, int len);
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static void cpc_tty_trace(pc300dev_t *dev, char* buf, int len, char rxtx);
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static void cpc_tty_signal_off(pc300dev_t *pc300dev, unsigned char);
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static void cpc_tty_signal_on(pc300dev_t *pc300dev, unsigned char);
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static int pc300_tiocmset(struct tty_struct *, struct file *,
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unsigned int, unsigned int);
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static int pc300_tiocmget(struct tty_struct *, struct file *);
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/* functions called by PC300 driver */
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void cpc_tty_init(pc300dev_t *dev);
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void cpc_tty_unregister_service(pc300dev_t *pc300dev);
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void cpc_tty_receive(pc300dev_t *pc300dev);
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void cpc_tty_trigger_poll(pc300dev_t *pc300dev);
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void cpc_tty_reset_var(void);
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/*
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* PC300 TTY clear "signal"
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*/
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static void cpc_tty_signal_off(pc300dev_t *pc300dev, unsigned char signal)
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{
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pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan;
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pc300_t *card = (pc300_t *) pc300chan->card;
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int ch = pc300chan->channel;
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unsigned long flags;
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CPC_TTY_DBG("%s-tty: Clear signal %x\n",
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pc300dev->dev->name, signal);
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CPC_TTY_LOCK(card, flags);
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cpc_writeb(card->hw.scabase + M_REG(CTL,ch),
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cpc_readb(card->hw.scabase+M_REG(CTL,ch))& signal);
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CPC_TTY_UNLOCK(card,flags);
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}
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/*
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* PC300 TTY set "signal" to ON
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*/
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static void cpc_tty_signal_on(pc300dev_t *pc300dev, unsigned char signal)
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{
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pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan;
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pc300_t *card = (pc300_t *) pc300chan->card;
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int ch = pc300chan->channel;
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unsigned long flags;
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CPC_TTY_DBG("%s-tty: Set signal %x\n",
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pc300dev->dev->name, signal);
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CPC_TTY_LOCK(card, flags);
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cpc_writeb(card->hw.scabase + M_REG(CTL,ch),
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cpc_readb(card->hw.scabase+M_REG(CTL,ch))& ~signal);
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CPC_TTY_UNLOCK(card,flags);
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}
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/*
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* PC300 TTY initialization routine
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*
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* This routine is called by the PC300 driver during board configuration
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* (ioctl=SIOCSP300CONF). At this point the adapter is completely
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* initialized.
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* o verify kernel version (only 2.4.x)
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* o register TTY driver
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* o init cpc_tty_area struct
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*/
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void cpc_tty_init(pc300dev_t *pc300dev)
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{
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unsigned long port;
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int aux;
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st_cpc_tty_area * cpc_tty;
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/* hdlcX - X=interface number */
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port = pc300dev->dev->name[4] - '0';
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if (port >= CPC_TTY_NPORTS) {
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printk("%s-tty: invalid interface selected (0-%i): %li",
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pc300dev->dev->name,
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CPC_TTY_NPORTS-1,port);
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return;
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}
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if (cpc_tty_cnt == 0) { /* first TTY connection -> register driver */
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CPC_TTY_DBG("%s-tty: driver init, major:%i, minor range:%i=%i\n",
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pc300dev->dev->name,
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CPC_TTY_MAJOR, CPC_TTY_MINOR_START,
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CPC_TTY_MINOR_START+CPC_TTY_NPORTS);
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/* initialize tty driver struct */
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memset(&serial_drv,0,sizeof(struct tty_driver));
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serial_drv.magic = TTY_DRIVER_MAGIC;
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serial_drv.owner = THIS_MODULE;
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serial_drv.driver_name = "pc300_tty";
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serial_drv.name = "ttyCP";
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serial_drv.major = CPC_TTY_MAJOR;
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serial_drv.minor_start = CPC_TTY_MINOR_START;
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serial_drv.num = CPC_TTY_NPORTS;
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serial_drv.type = TTY_DRIVER_TYPE_SERIAL;
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serial_drv.subtype = SERIAL_TYPE_NORMAL;
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serial_drv.init_termios = tty_std_termios;
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serial_drv.init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
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serial_drv.flags = TTY_DRIVER_REAL_RAW;
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/* interface routines from the upper tty layer to the tty driver */
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serial_drv.open = cpc_tty_open;
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serial_drv.close = cpc_tty_close;
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serial_drv.write = cpc_tty_write;
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serial_drv.write_room = cpc_tty_write_room;
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serial_drv.chars_in_buffer = cpc_tty_chars_in_buffer;
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serial_drv.tiocmset = pc300_tiocmset;
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serial_drv.tiocmget = pc300_tiocmget;
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serial_drv.flush_buffer = cpc_tty_flush_buffer;
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serial_drv.hangup = cpc_tty_hangup;
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/* register the TTY driver */
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if (tty_register_driver(&serial_drv)) {
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printk("%s-tty: Failed to register serial driver! ",
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pc300dev->dev->name);
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return;
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}
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memset((void *)cpc_tty_area, 0,
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sizeof(st_cpc_tty_area) * CPC_TTY_NPORTS);
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}
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cpc_tty = &cpc_tty_area[port];
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if (cpc_tty->state != CPC_TTY_ST_IDLE) {
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CPC_TTY_DBG("%s-tty: TTY port %i, already in use.\n",
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pc300dev->dev->name, port);
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return;
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}
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cpc_tty_cnt++;
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cpc_tty->state = CPC_TTY_ST_INIT;
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cpc_tty->num_open= 0;
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cpc_tty->tty_minor = port + CPC_TTY_MINOR_START;
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cpc_tty->pc300dev = pc300dev;
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INIT_WORK(&cpc_tty->tty_tx_work, cpc_tty_tx_work);
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INIT_WORK(&cpc_tty->tty_rx_work, cpc_tty_rx_work);
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cpc_tty->buf_rx.first = cpc_tty->buf_rx.last = NULL;
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pc300dev->cpc_tty = (void *)cpc_tty;
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aux = strlen(pc300dev->dev->name);
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memcpy(cpc_tty->name, pc300dev->dev->name, aux);
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memcpy(&cpc_tty->name[aux], "-tty", 5);
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cpc_open(pc300dev->dev);
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cpc_tty_signal_off(pc300dev, CTL_DTR);
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CPC_TTY_DBG("%s: Initializing TTY Sync Driver, tty major#%d minor#%i\n",
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cpc_tty->name,CPC_TTY_MAJOR,cpc_tty->tty_minor);
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return;
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}
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/*
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* PC300 TTY OPEN routine
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*
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* This routine is called by the tty driver to open the interface
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* o verify minor
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* o allocate buffer to Rx and Tx
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*/
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static int cpc_tty_open(struct tty_struct *tty, struct file *flip)
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{
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int port ;
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st_cpc_tty_area *cpc_tty;
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if (!tty) {
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return -ENODEV;
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}
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port = tty->index;
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if ((port < 0) || (port >= CPC_TTY_NPORTS)){
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CPC_TTY_DBG("pc300_tty: open invalid port %d\n", port);
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return -ENODEV;
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}
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cpc_tty = &cpc_tty_area[port];
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if (cpc_tty->state == CPC_TTY_ST_IDLE){
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CPC_TTY_DBG("%s: open - invalid interface, port=%d\n",
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cpc_tty->name, tty->index);
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return -ENODEV;
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}
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if (cpc_tty->num_open == 0) { /* first open of this tty */
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if (!cpc_tty_area[port].buf_tx){
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cpc_tty_area[port].buf_tx = kmalloc(CPC_TTY_MAX_MTU,GFP_KERNEL);
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if (cpc_tty_area[port].buf_tx == 0){
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CPC_TTY_DBG("%s: error in memory allocation\n",cpc_tty->name);
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return -ENOMEM;
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}
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}
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if (cpc_tty_area[port].buf_rx.first) {
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unsigned char * aux;
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while (cpc_tty_area[port].buf_rx.first) {
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aux = (unsigned char *)cpc_tty_area[port].buf_rx.first;
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cpc_tty_area[port].buf_rx.first = cpc_tty_area[port].buf_rx.first->next;
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kfree(aux);
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}
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cpc_tty_area[port].buf_rx.first = NULL;
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cpc_tty_area[port].buf_rx.last = NULL;
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}
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cpc_tty_area[port].state = CPC_TTY_ST_OPEN;
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cpc_tty_area[port].tty = tty;
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tty->driver_data = &cpc_tty_area[port];
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cpc_tty_signal_on(cpc_tty->pc300dev, CTL_DTR);
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}
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cpc_tty->num_open++;
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CPC_TTY_DBG("%s: opening TTY driver\n", cpc_tty->name);
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/* avisar driver PC300 */
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return 0;
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}
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/*
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* PC300 TTY CLOSE routine
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*
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* This routine is called by the tty driver to close the interface
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* o call close channel in PC300 driver (cpc_closech)
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* o free Rx and Tx buffers
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*/
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static void cpc_tty_close(struct tty_struct *tty, struct file *flip)
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{
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st_cpc_tty_area *cpc_tty;
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unsigned long flags;
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int res;
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if (!tty || !tty->driver_data ) {
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CPC_TTY_DBG("hdlx-tty: no TTY in close \n");
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return;
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}
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cpc_tty = (st_cpc_tty_area *) tty->driver_data;
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if ((cpc_tty->tty != tty)|| (cpc_tty->state != CPC_TTY_ST_OPEN)) {
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CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name);
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return;
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}
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if (!cpc_tty->num_open) {
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CPC_TTY_DBG("%s: TTY is closed\n",cpc_tty->name);
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return;
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}
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if (--cpc_tty->num_open > 0) {
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CPC_TTY_DBG("%s: TTY closed\n",cpc_tty->name);
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return;
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}
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cpc_tty_signal_off(cpc_tty->pc300dev, CTL_DTR);
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CPC_TTY_LOCK(cpc_tty->pc300dev->chan->card, flags); /* lock irq */
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cpc_tty->tty = NULL;
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cpc_tty->state = CPC_TTY_ST_INIT;
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CPC_TTY_UNLOCK(cpc_tty->pc300dev->chan->card, flags); /* unlock irq */
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if (cpc_tty->buf_rx.first) {
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unsigned char * aux;
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while (cpc_tty->buf_rx.first) {
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aux = (unsigned char *)cpc_tty->buf_rx.first;
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cpc_tty->buf_rx.first = cpc_tty->buf_rx.first->next;
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kfree(aux);
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}
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cpc_tty->buf_rx.first = NULL;
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cpc_tty->buf_rx.last = NULL;
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}
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kfree(cpc_tty->buf_tx);
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cpc_tty->buf_tx = NULL;
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CPC_TTY_DBG("%s: TTY closed\n",cpc_tty->name);
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if (!serial_drv.refcount && cpc_tty_unreg_flag) {
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cpc_tty_unreg_flag = 0;
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CPC_TTY_DBG("%s: unregister the tty driver\n", cpc_tty->name);
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if ((res=tty_unregister_driver(&serial_drv))) {
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CPC_TTY_DBG("%s: ERROR ->unregister the tty driver error=%d\n",
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cpc_tty->name,res);
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}
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}
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return;
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}
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|
|
/*
|
|
* PC300 TTY WRITE routine
|
|
*
|
|
* This routine is called by the tty driver to write a series of characters
|
|
* to the tty device. The characters may come from user or kernel space.
|
|
* o verify the DCD signal
|
|
* o send characters to board and start the transmission
|
|
*/
|
|
static int cpc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
pc300ch_t *pc300chan;
|
|
pc300_t *card;
|
|
int ch;
|
|
unsigned long flags;
|
|
struct net_device_stats *stats;
|
|
|
|
if (!tty || !tty->driver_data ) {
|
|
CPC_TTY_DBG("hdlcX-tty: no TTY in write\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) {
|
|
CPC_TTY_DBG("%s: TTY is not opened\n", cpc_tty->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (count > CPC_TTY_MAX_MTU) {
|
|
CPC_TTY_DBG("%s: count is invalid\n",cpc_tty->name);
|
|
return -EINVAL; /* frame too big */
|
|
}
|
|
|
|
CPC_TTY_DBG("%s: cpc_tty_write data len=%i\n",cpc_tty->name,count);
|
|
|
|
pc300chan = (pc300ch_t *)((pc300dev_t*)cpc_tty->pc300dev)->chan;
|
|
stats = hdlc_stats(((pc300dev_t*)cpc_tty->pc300dev)->dev);
|
|
card = (pc300_t *) pc300chan->card;
|
|
ch = pc300chan->channel;
|
|
|
|
/* verify DCD signal*/
|
|
if (cpc_readb(card->hw.scabase + M_REG(ST3,ch)) & ST3_DCD) {
|
|
/* DCD is OFF */
|
|
CPC_TTY_DBG("%s : DCD is OFF\n", cpc_tty->name);
|
|
stats->tx_errors++;
|
|
stats->tx_carrier_errors++;
|
|
CPC_TTY_LOCK(card, flags);
|
|
cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_TX_BUF_CLR);
|
|
|
|
if (card->hw.type == PC300_TE) {
|
|
cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
|
|
cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) &
|
|
~(CPLD_REG2_FALC_LED1 << (2 *ch)));
|
|
}
|
|
|
|
CPC_TTY_UNLOCK(card, flags);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cpc_tty_send_to_card(cpc_tty->pc300dev, (void*)buf, count)) {
|
|
/* failed to send */
|
|
CPC_TTY_DBG("%s: trasmition error\n", cpc_tty->name);
|
|
return 0;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY Write Room routine
|
|
*
|
|
* This routine returns the numbers of characteres the tty driver will accept
|
|
* for queuing to be written.
|
|
* o return MTU
|
|
*/
|
|
static int cpc_tty_write_room(struct tty_struct *tty)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
|
|
if (!tty || !tty->driver_data ) {
|
|
CPC_TTY_DBG("hdlcX-tty: no TTY to write room\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) {
|
|
CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
CPC_TTY_DBG("%s: write room\n",cpc_tty->name);
|
|
|
|
return CPC_TTY_MAX_MTU;
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY chars in buffer routine
|
|
*
|
|
* This routine returns the chars number in the transmission buffer
|
|
* o returns 0
|
|
*/
|
|
static int cpc_tty_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
|
|
if (!tty || !tty->driver_data ) {
|
|
CPC_TTY_DBG("hdlcX-tty: no TTY to chars in buffer\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) {
|
|
CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int pc300_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
|
|
CPC_TTY_DBG("%s: set:%x clear:%x\n", __FUNCTION__, set, clear);
|
|
|
|
if (!tty || !tty->driver_data ) {
|
|
CPC_TTY_DBG("hdlcX-tty: no TTY to chars in buffer\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
if (set & TIOCM_RTS)
|
|
cpc_tty_signal_on(cpc_tty->pc300dev, CTL_RTS);
|
|
if (set & TIOCM_DTR)
|
|
cpc_tty_signal_on(cpc_tty->pc300dev, CTL_DTR);
|
|
|
|
if (clear & TIOCM_RTS)
|
|
cpc_tty_signal_off(cpc_tty->pc300dev, CTL_RTS);
|
|
if (clear & TIOCM_DTR)
|
|
cpc_tty_signal_off(cpc_tty->pc300dev, CTL_DTR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pc300_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
unsigned int result;
|
|
unsigned char status;
|
|
unsigned long flags;
|
|
st_cpc_tty_area *cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
pc300dev_t *pc300dev = cpc_tty->pc300dev;
|
|
pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan;
|
|
pc300_t *card = (pc300_t *) pc300chan->card;
|
|
int ch = pc300chan->channel;
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
CPC_TTY_DBG("%s-tty: tiocmget\n",
|
|
((struct net_device*)(pc300dev->hdlc))->name);
|
|
|
|
CPC_TTY_LOCK(card, flags);
|
|
status = cpc_readb(card->hw.scabase+M_REG(CTL,ch));
|
|
CPC_TTY_UNLOCK(card,flags);
|
|
|
|
result = ((status & CTL_DTR) ? TIOCM_DTR : 0) |
|
|
((status & CTL_RTS) ? TIOCM_RTS : 0);
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY Flush Buffer routine
|
|
*
|
|
* This routine resets the transmission buffer
|
|
*/
|
|
static void cpc_tty_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
|
|
if (!tty || !tty->driver_data ) {
|
|
CPC_TTY_DBG("hdlcX-tty: no TTY to flush buffer\n");
|
|
return;
|
|
}
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) {
|
|
CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name);
|
|
return;
|
|
}
|
|
|
|
CPC_TTY_DBG("%s: call wake_up_interruptible\n",cpc_tty->name);
|
|
|
|
tty_wakeup(tty);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY Hangup routine
|
|
*
|
|
* This routine is called by the tty driver to hangup the interface
|
|
* o clear DTR signal
|
|
*/
|
|
|
|
static void cpc_tty_hangup(struct tty_struct *tty)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
int res;
|
|
|
|
if (!tty || !tty->driver_data ) {
|
|
CPC_TTY_DBG("hdlcX-tty: no TTY to hangup\n");
|
|
return ;
|
|
}
|
|
|
|
cpc_tty = (st_cpc_tty_area *) tty->driver_data;
|
|
|
|
if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) {
|
|
CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name);
|
|
return ;
|
|
}
|
|
if (!serial_drv.refcount && cpc_tty_unreg_flag) {
|
|
cpc_tty_unreg_flag = 0;
|
|
CPC_TTY_DBG("%s: unregister the tty driver\n", cpc_tty->name);
|
|
if ((res=tty_unregister_driver(&serial_drv))) {
|
|
CPC_TTY_DBG("%s: ERROR ->unregister the tty driver error=%d\n",
|
|
cpc_tty->name,res);
|
|
}
|
|
}
|
|
cpc_tty_signal_off(cpc_tty->pc300dev, CTL_DTR);
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY RX work routine
|
|
* This routine treats RX work
|
|
* o verify read buffer
|
|
* o call the line disc. read
|
|
* o free memory
|
|
*/
|
|
static void cpc_tty_rx_work(struct work_struct *work)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
unsigned long port;
|
|
int i, j;
|
|
volatile st_cpc_rx_buf *buf;
|
|
char flags=0,flg_rx=1;
|
|
struct tty_ldisc *ld;
|
|
|
|
if (cpc_tty_cnt == 0) return;
|
|
|
|
for (i=0; (i < 4) && flg_rx ; i++) {
|
|
flg_rx = 0;
|
|
|
|
cpc_tty = container_of(work, st_cpc_tty_area, tty_rx_work);
|
|
port = cpc_tty - cpc_tty_area;
|
|
|
|
for (j=0; j < CPC_TTY_NPORTS; j++) {
|
|
cpc_tty = &cpc_tty_area[port];
|
|
|
|
if ((buf=cpc_tty->buf_rx.first) != 0) {
|
|
if (cpc_tty->tty) {
|
|
ld = tty_ldisc_ref(cpc_tty->tty);
|
|
if (ld) {
|
|
if (ld->receive_buf) {
|
|
CPC_TTY_DBG("%s: call line disc. receive_buf\n",cpc_tty->name);
|
|
ld->receive_buf(cpc_tty->tty, (char *)(buf->data), &flags, buf->size);
|
|
}
|
|
tty_ldisc_deref(ld);
|
|
}
|
|
}
|
|
cpc_tty->buf_rx.first = cpc_tty->buf_rx.first->next;
|
|
kfree((void *)buf);
|
|
buf = cpc_tty->buf_rx.first;
|
|
flg_rx = 1;
|
|
}
|
|
if (++port == CPC_TTY_NPORTS) port = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY RX work routine
|
|
*
|
|
* This routine treats RX interrupt.
|
|
* o read all frames in card
|
|
* o verify the frame size
|
|
* o read the frame in rx buffer
|
|
*/
|
|
static void cpc_tty_rx_disc_frame(pc300ch_t *pc300chan)
|
|
{
|
|
volatile pcsca_bd_t __iomem * ptdescr;
|
|
volatile unsigned char status;
|
|
pc300_t *card = (pc300_t *)pc300chan->card;
|
|
int ch = pc300chan->channel;
|
|
|
|
/* dma buf read */
|
|
ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase +
|
|
RX_BD_ADDR(ch, pc300chan->rx_first_bd));
|
|
while (pc300chan->rx_first_bd != pc300chan->rx_last_bd) {
|
|
status = cpc_readb(&ptdescr->status);
|
|
cpc_writeb(&ptdescr->status, 0);
|
|
cpc_writeb(&ptdescr->len, 0);
|
|
pc300chan->rx_first_bd = (pc300chan->rx_first_bd + 1) &
|
|
(N_DMA_RX_BUF - 1);
|
|
if (status & DST_EOM) {
|
|
break; /* end of message */
|
|
}
|
|
ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + cpc_readl(&ptdescr->next));
|
|
}
|
|
}
|
|
|
|
void cpc_tty_receive(pc300dev_t *pc300dev)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan;
|
|
pc300_t *card = (pc300_t *)pc300chan->card;
|
|
int ch = pc300chan->channel;
|
|
volatile pcsca_bd_t __iomem * ptdescr;
|
|
struct net_device_stats *stats = hdlc_stats(pc300dev->dev);
|
|
int rx_len, rx_aux;
|
|
volatile unsigned char status;
|
|
unsigned short first_bd = pc300chan->rx_first_bd;
|
|
st_cpc_rx_buf *new = NULL;
|
|
unsigned char dsr_rx;
|
|
|
|
if (pc300dev->cpc_tty == NULL) {
|
|
return;
|
|
}
|
|
|
|
dsr_rx = cpc_readb(card->hw.scabase + DSR_RX(ch));
|
|
|
|
cpc_tty = (st_cpc_tty_area *)pc300dev->cpc_tty;
|
|
|
|
while (1) {
|
|
rx_len = 0;
|
|
ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + RX_BD_ADDR(ch, first_bd));
|
|
while ((status = cpc_readb(&ptdescr->status)) & DST_OSB) {
|
|
rx_len += cpc_readw(&ptdescr->len);
|
|
first_bd = (first_bd + 1) & (N_DMA_RX_BUF - 1);
|
|
if (status & DST_EOM) {
|
|
break;
|
|
}
|
|
ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase+cpc_readl(&ptdescr->next));
|
|
}
|
|
|
|
if (!rx_len) {
|
|
if (dsr_rx & DSR_BOF) {
|
|
/* update EDA */
|
|
cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch),
|
|
RX_BD_ADDR(ch, pc300chan->rx_last_bd));
|
|
}
|
|
kfree(new);
|
|
return;
|
|
}
|
|
|
|
if (rx_len > CPC_TTY_MAX_MTU) {
|
|
/* Free RX descriptors */
|
|
CPC_TTY_DBG("%s: frame size is invalid.\n",cpc_tty->name);
|
|
stats->rx_errors++;
|
|
stats->rx_frame_errors++;
|
|
cpc_tty_rx_disc_frame(pc300chan);
|
|
continue;
|
|
}
|
|
|
|
new = kmalloc(rx_len + sizeof(st_cpc_rx_buf), GFP_ATOMIC);
|
|
if (new == 0) {
|
|
cpc_tty_rx_disc_frame(pc300chan);
|
|
continue;
|
|
}
|
|
|
|
/* dma buf read */
|
|
ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase +
|
|
RX_BD_ADDR(ch, pc300chan->rx_first_bd));
|
|
|
|
rx_len = 0; /* counter frame size */
|
|
|
|
while ((status = cpc_readb(&ptdescr->status)) & DST_OSB) {
|
|
rx_aux = cpc_readw(&ptdescr->len);
|
|
if ((status & (DST_OVR | DST_CRC | DST_RBIT | DST_SHRT | DST_ABT))
|
|
|| (rx_aux > BD_DEF_LEN)) {
|
|
CPC_TTY_DBG("%s: reception error\n", cpc_tty->name);
|
|
stats->rx_errors++;
|
|
if (status & DST_OVR) {
|
|
stats->rx_fifo_errors++;
|
|
}
|
|
if (status & DST_CRC) {
|
|
stats->rx_crc_errors++;
|
|
}
|
|
if ((status & (DST_RBIT | DST_SHRT | DST_ABT)) ||
|
|
(rx_aux > BD_DEF_LEN)) {
|
|
stats->rx_frame_errors++;
|
|
}
|
|
/* discard remainig descriptors used by the bad frame */
|
|
CPC_TTY_DBG("%s: reception error - discard descriptors",
|
|
cpc_tty->name);
|
|
cpc_tty_rx_disc_frame(pc300chan);
|
|
rx_len = 0;
|
|
kfree(new);
|
|
new = NULL;
|
|
break; /* read next frame - while(1) */
|
|
}
|
|
|
|
if (cpc_tty->state != CPC_TTY_ST_OPEN) {
|
|
/* Free RX descriptors */
|
|
cpc_tty_rx_disc_frame(pc300chan);
|
|
stats->rx_dropped++;
|
|
rx_len = 0;
|
|
kfree(new);
|
|
new = NULL;
|
|
break; /* read next frame - while(1) */
|
|
}
|
|
|
|
/* read the segment of the frame */
|
|
if (rx_aux != 0) {
|
|
memcpy_fromio((new->data + rx_len),
|
|
(void __iomem *)(card->hw.rambase +
|
|
cpc_readl(&ptdescr->ptbuf)), rx_aux);
|
|
rx_len += rx_aux;
|
|
}
|
|
cpc_writeb(&ptdescr->status,0);
|
|
cpc_writeb(&ptdescr->len, 0);
|
|
pc300chan->rx_first_bd = (pc300chan->rx_first_bd + 1) &
|
|
(N_DMA_RX_BUF -1);
|
|
if (status & DST_EOM)break;
|
|
|
|
ptdescr = (pcsca_bd_t __iomem *) (card->hw.rambase +
|
|
cpc_readl(&ptdescr->next));
|
|
}
|
|
/* update pointer */
|
|
pc300chan->rx_last_bd = (pc300chan->rx_first_bd - 1) &
|
|
(N_DMA_RX_BUF - 1) ;
|
|
if (!(dsr_rx & DSR_BOF)) {
|
|
/* update EDA */
|
|
cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch),
|
|
RX_BD_ADDR(ch, pc300chan->rx_last_bd));
|
|
}
|
|
if (rx_len != 0) {
|
|
stats->rx_bytes += rx_len;
|
|
|
|
if (pc300dev->trace_on) {
|
|
cpc_tty_trace(pc300dev, new->data,rx_len, 'R');
|
|
}
|
|
new->size = rx_len;
|
|
new->next = NULL;
|
|
if (cpc_tty->buf_rx.first == 0) {
|
|
cpc_tty->buf_rx.first = new;
|
|
cpc_tty->buf_rx.last = new;
|
|
} else {
|
|
cpc_tty->buf_rx.last->next = new;
|
|
cpc_tty->buf_rx.last = new;
|
|
}
|
|
schedule_work(&(cpc_tty->tty_rx_work));
|
|
stats->rx_packets++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY TX work routine
|
|
*
|
|
* This routine treats TX interrupt.
|
|
* o if need call line discipline wakeup
|
|
* o call wake_up_interruptible
|
|
*/
|
|
static void cpc_tty_tx_work(struct work_struct *work)
|
|
{
|
|
st_cpc_tty_area *cpc_tty =
|
|
container_of(work, st_cpc_tty_area, tty_tx_work);
|
|
struct tty_struct *tty;
|
|
|
|
CPC_TTY_DBG("%s: cpc_tty_tx_work init\n",cpc_tty->name);
|
|
|
|
if ((tty = cpc_tty->tty) == 0) {
|
|
CPC_TTY_DBG("%s: the interface is not opened\n",cpc_tty->name);
|
|
return;
|
|
}
|
|
tty_wakeup(tty);
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY send to card routine
|
|
*
|
|
* This routine send data to card.
|
|
* o clear descriptors
|
|
* o write data to DMA buffers
|
|
* o start the transmission
|
|
*/
|
|
static int cpc_tty_send_to_card(pc300dev_t *dev,void* buf, int len)
|
|
{
|
|
pc300ch_t *chan = (pc300ch_t *)dev->chan;
|
|
pc300_t *card = (pc300_t *)chan->card;
|
|
int ch = chan->channel;
|
|
struct net_device_stats *stats = hdlc_stats(dev->dev);
|
|
unsigned long flags;
|
|
volatile pcsca_bd_t __iomem *ptdescr;
|
|
int i, nchar;
|
|
int tosend = len;
|
|
int nbuf = ((len - 1)/BD_DEF_LEN) + 1;
|
|
unsigned char *pdata=buf;
|
|
|
|
CPC_TTY_DBG("%s:cpc_tty_send_to_cars len=%i",
|
|
(st_cpc_tty_area *)dev->cpc_tty->name,len);
|
|
|
|
if (nbuf >= card->chan[ch].nfree_tx_bd) {
|
|
return 1;
|
|
}
|
|
|
|
/* write buffer to DMA buffers */
|
|
CPC_TTY_DBG("%s: call dma_buf_write\n",
|
|
(st_cpc_tty_area *)dev->cpc_tty->name);
|
|
for (i = 0 ; i < nbuf ; i++) {
|
|
ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase +
|
|
TX_BD_ADDR(ch, card->chan[ch].tx_next_bd));
|
|
nchar = (BD_DEF_LEN > tosend) ? tosend : BD_DEF_LEN;
|
|
if (cpc_readb(&ptdescr->status) & DST_OSB) {
|
|
memcpy_toio((void __iomem *)(card->hw.rambase +
|
|
cpc_readl(&ptdescr->ptbuf)),
|
|
&pdata[len - tosend],
|
|
nchar);
|
|
card->chan[ch].nfree_tx_bd--;
|
|
if ((i + 1) == nbuf) {
|
|
/* This must be the last BD to be used */
|
|
cpc_writeb(&ptdescr->status, DST_EOM);
|
|
} else {
|
|
cpc_writeb(&ptdescr->status, 0);
|
|
}
|
|
cpc_writew(&ptdescr->len, nchar);
|
|
} else {
|
|
CPC_TTY_DBG("%s: error in dma_buf_write\n",
|
|
(st_cpc_tty_area *)dev->cpc_tty->name);
|
|
stats->tx_dropped++;
|
|
return 1;
|
|
}
|
|
tosend -= nchar;
|
|
card->chan[ch].tx_next_bd =
|
|
(card->chan[ch].tx_next_bd + 1) & (N_DMA_TX_BUF - 1);
|
|
}
|
|
|
|
if (dev->trace_on) {
|
|
cpc_tty_trace(dev, buf, len,'T');
|
|
}
|
|
|
|
/* start transmission */
|
|
CPC_TTY_DBG("%s: start transmission\n",
|
|
(st_cpc_tty_area *)dev->cpc_tty->name);
|
|
|
|
CPC_TTY_LOCK(card, flags);
|
|
cpc_writeb(card->hw.scabase + DTX_REG(EDAL, ch),
|
|
TX_BD_ADDR(ch, chan->tx_next_bd));
|
|
cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_TX_ENA);
|
|
cpc_writeb(card->hw.scabase + DSR_TX(ch), DSR_DE);
|
|
|
|
if (card->hw.type == PC300_TE) {
|
|
cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
|
|
cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) |
|
|
(CPLD_REG2_FALC_LED1 << (2 * ch)));
|
|
}
|
|
CPC_TTY_UNLOCK(card, flags);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY trace routine
|
|
*
|
|
* This routine send trace of connection to application.
|
|
* o clear descriptors
|
|
* o write data to DMA buffers
|
|
* o start the transmission
|
|
*/
|
|
|
|
static void cpc_tty_trace(pc300dev_t *dev, char* buf, int len, char rxtx)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
if ((skb = dev_alloc_skb(10 + len)) == NULL) {
|
|
/* out of memory */
|
|
CPC_TTY_DBG("%s: tty_trace - out of memory\n", dev->dev->name);
|
|
return;
|
|
}
|
|
|
|
skb_put (skb, 10 + len);
|
|
skb->dev = dev->dev;
|
|
skb->protocol = htons(ETH_P_CUST);
|
|
skb->mac.raw = skb->data;
|
|
skb->pkt_type = PACKET_HOST;
|
|
skb->len = 10 + len;
|
|
|
|
memcpy(skb->data,dev->dev->name,5);
|
|
skb->data[5] = '[';
|
|
skb->data[6] = rxtx;
|
|
skb->data[7] = ']';
|
|
skb->data[8] = ':';
|
|
skb->data[9] = ' ';
|
|
memcpy(&skb->data[10], buf, len);
|
|
netif_rx(skb);
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY unregister service routine
|
|
*
|
|
* This routine unregister one interface.
|
|
*/
|
|
void cpc_tty_unregister_service(pc300dev_t *pc300dev)
|
|
{
|
|
st_cpc_tty_area *cpc_tty;
|
|
ulong flags;
|
|
int res;
|
|
|
|
if ((cpc_tty= (st_cpc_tty_area *) pc300dev->cpc_tty) == 0) {
|
|
CPC_TTY_DBG("%s: interface is not TTY\n", pc300dev->dev->name);
|
|
return;
|
|
}
|
|
CPC_TTY_DBG("%s: cpc_tty_unregister_service", cpc_tty->name);
|
|
|
|
if (cpc_tty->pc300dev != pc300dev) {
|
|
CPC_TTY_DBG("%s: invalid tty ptr=%s\n",
|
|
pc300dev->dev->name, cpc_tty->name);
|
|
return;
|
|
}
|
|
|
|
if (--cpc_tty_cnt == 0) {
|
|
if (serial_drv.refcount) {
|
|
CPC_TTY_DBG("%s: unregister is not possible, refcount=%d",
|
|
cpc_tty->name, serial_drv.refcount);
|
|
cpc_tty_cnt++;
|
|
cpc_tty_unreg_flag = 1;
|
|
return;
|
|
} else {
|
|
CPC_TTY_DBG("%s: unregister the tty driver\n", cpc_tty->name);
|
|
if ((res=tty_unregister_driver(&serial_drv))) {
|
|
CPC_TTY_DBG("%s: ERROR ->unregister the tty driver error=%d\n",
|
|
cpc_tty->name,res);
|
|
}
|
|
}
|
|
}
|
|
CPC_TTY_LOCK(pc300dev->chan->card,flags);
|
|
cpc_tty->tty = NULL;
|
|
CPC_TTY_UNLOCK(pc300dev->chan->card, flags);
|
|
cpc_tty->tty_minor = 0;
|
|
cpc_tty->state = CPC_TTY_ST_IDLE;
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY trigger poll routine
|
|
* This routine is called by pc300driver to treats Tx interrupt.
|
|
*/
|
|
void cpc_tty_trigger_poll(pc300dev_t *pc300dev)
|
|
{
|
|
st_cpc_tty_area *cpc_tty = (st_cpc_tty_area *)pc300dev->cpc_tty;
|
|
if (!cpc_tty) {
|
|
return;
|
|
}
|
|
schedule_work(&(cpc_tty->tty_tx_work));
|
|
}
|
|
|
|
/*
|
|
* PC300 TTY reset var routine
|
|
* This routine is called by pc300driver to init the TTY area.
|
|
*/
|
|
|
|
void cpc_tty_reset_var(void)
|
|
{
|
|
int i ;
|
|
|
|
CPC_TTY_DBG("hdlcX-tty: reset variables\n");
|
|
/* reset the tty_driver structure - serial_drv */
|
|
memset(&serial_drv, 0, sizeof(struct tty_driver));
|
|
for (i=0; i < CPC_TTY_NPORTS; i++){
|
|
memset(&cpc_tty_area[i],0, sizeof(st_cpc_tty_area));
|
|
}
|
|
}
|