patch-2.3.21 linux/drivers/net/cosa.c
Next file: linux/drivers/net/cosa.h
Previous file: linux/drivers/net/arcnet.c
Back to the patch index
Back to the overall index
- Lines: 2039
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.20/linux/drivers/net/cosa.c
- Orig date:
Fri Sep 10 23:57:29 1999
diff -u --recursive --new-file v2.3.20/linux/drivers/net/cosa.c linux/drivers/net/cosa.c
@@ -1,2038 +0,0 @@
-/* $Id: cosa.c,v 1.26 1999/07/09 15:02:37 kas Exp $ */
-
-/*
- * Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@fi.muni.cz>
- *
- * 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.
- */
-
-/*
- * The driver for the SRP and COSA synchronous serial cards.
- *
- * HARDWARE INFO
- *
- * Both cards are developed at the Institute of Computer Science,
- * Masaryk University (http://www.ics.muni.cz/). The hardware is
- * developed by Jiri Novotny <novotny@ics.muni.cz>. More information
- * and the photo of both cards is available at
- * http://www.pavoucek.cz/cosa.html. The card documentation, firmwares
- * and other goods can be downloaded from ftp://ftp.ics.muni.cz/pub/cosa/.
- * For Linux-specific utilities, see below in the "Software info" section.
- * If you want to order the card, contact Jiri Novotny.
- *
- * The SRP (serial port?, the Czech word "srp" means "sickle") card
- * is a 2-port intelligent (with its own 8-bit CPU) synchronous serial card
- * with V.24 interfaces up to 80kb/s each.
- *
- * The COSA (communication serial adapter?, the Czech word "kosa" means
- * "scythe") is a next-generation sync/async board with two interfaces
- * - currently any of V.24, X.21, V.35 and V.36 can be selected.
- * It has a 16-bit SAB80166 CPU and can do up to 10 Mb/s per channel.
- * The 8-channels version is in development.
- *
- * Both types have downloadable firmware and communicate via ISA DMA.
- * COSA can be also a bus-mastering device.
- *
- * SOFTWARE INFO
- *
- * The homepage of the Linux driver is at http://www.fi.muni.cz/~kas/cosa/.
- * The CVS tree of Linux driver can be viewed there, as well as the
- * firmware binaries and user-space utilities for downloading the firmware
- * into the card and setting up the card.
- *
- * The Linux driver (unlike the present *BSD drivers :-) can work even
- * for the COSA and SRP in one computer and allows each channel to work
- * in one of the three modes (character device, Cisco HDLC, Sync PPP).
- *
- * AUTHOR
- *
- * The Linux driver was written by Jan "Yenya" Kasprzak <kas@fi.muni.cz>.
- *
- * You can mail me bugfixes and even success reports. I am especially
- * interested in the SMP and/or muliti-channel success/failure reports
- * (I wonder if I did the locking properly :-).
- *
- * THE AUTHOR USED THE FOLLOWING SOURCES WHEN PROGRAMMING THE DRIVER
- *
- * The COSA/SRP NetBSD driver by Zdenek Salvet and Ivos Cernohlavek
- * The skeleton.c by Donald Becker
- * The SDL Riscom/N2 driver by Mike Natale
- * The Comtrol Hostess SV11 driver by Alan Cox
- * The Sync PPP/Cisco HDLC layer (syncppp.c) ported to Linux by Alan Cox
- */
-/*
- * 5/25/1999 : Marcelo Tosatti <marcelo@conectiva.com.br>
- * fixed a deadlock in cosa_sppp_open
- */
-
-/* ---------- Headers, macros, data structures ---------- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/malloc.h>
-#include <linux/poll.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/netdevice.h>
-#include <linux/spinlock.h>
-
-#undef COSA_SLOW_IO /* for testing purposes only */
-#undef REALLY_SLOW_IO
-
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/byteorder.h>
-
-#include "syncppp.h"
-#include "cosa.h"
-
-/* Linux version stuff */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,1)
-typedef struct wait_queue *wait_queue_head_t;
-#define DECLARE_WAITQUEUE(wait, current) \
- struct wait_queue wait = { current, NULL }
-#endif
-
-/* Maximum length of the identification string. */
-#define COSA_MAX_ID_STRING 128
-
-/* Maximum length of the channel name */
-#define COSA_MAX_NAME (sizeof("cosaXXXcXXX")+1)
-
-/* Per-channel data structure */
-
-struct channel_data {
- int usage; /* Usage count; >0 for chrdev, -1 for netdev */
- int num; /* Number of the channel */
- struct cosa_data *cosa; /* Pointer to the per-card structure */
- int txsize; /* Size of transmitted data */
- char *txbuf; /* Transmit buffer */
- char name[COSA_MAX_NAME]; /* channel name */
-
- /* The HW layer interface */
- /* routine called from the RX interrupt */
- char *(*setup_rx)(struct channel_data *channel, int size);
- /* routine called when the RX is done (from the EOT interrupt) */
- int (*rx_done)(struct channel_data *channel);
- /* routine called when the TX is done (from the EOT interrupt) */
- int (*tx_done)(struct channel_data *channel, int size);
-
- /* Character device parts */
- struct semaphore rsem, wsem;
- char *rxdata;
- int rxsize;
- wait_queue_head_t txwaitq;
- wait_queue_head_t rxwaitq;
- int tx_status, rx_status;
-
- /* SPPP/HDLC device parts */
- struct ppp_device pppdev;
- struct sk_buff *rx_skb, *tx_skb;
- struct net_device_stats stats;
-};
-
-struct cosa_data {
- int num; /* Card number */
- char name[COSA_MAX_NAME]; /* Card name - e.g "cosa0" */
- unsigned int datareg, statusreg; /* I/O ports */
- unsigned short irq, dma; /* IRQ and DMA number */
- unsigned short startaddr; /* Firmware start address */
- unsigned short busmaster; /* Use busmastering? */
- int nchannels; /* # of channels on this card */
- int driver_status; /* For communicating with firware */
- int firmware_status; /* Downloaded, reseted, etc. */
- int rxbitmap, txbitmap; /* Bitmap of channels who are willing to send/receive data */
- int rxtx; /* RX or TX in progress? */
- int enabled;
- int usage; /* usage count */
- int txchan, txsize, rxsize;
- struct channel_data *rxchan;
- char *bouncebuf;
- char *txbuf, *rxbuf;
- struct channel_data *chan;
- spinlock_t lock; /* For exclusive operations on this structure */
- char id_string[COSA_MAX_ID_STRING]; /* ROM monitor ID string */
- char *type; /* card type */
-};
-
-/*
- * Define this if you want all the possible ports to be autoprobed.
- * It is here but it probably is not a good idea to use this.
- */
-/* #define COSA_ISA_AUTOPROBE 1 */
-
-/*
- * Character device major number. 117 was allocated for us.
- * The value of 0 means to allocate a first free one.
- */
-static int cosa_major = 117;
-
-/*
- * Encoding of the minor numbers:
- * The lowest CARD_MINOR_BITS bits means the channel on the single card,
- * the highest bits means the card number.
- */
-#define CARD_MINOR_BITS 4 /* How many bits in minor number are reserved
- * for the single card */
-/*
- * The following depends on CARD_MINOR_BITS. Unfortunately, the "MODULE_STRING"
- * macro doesn't like anything other than the raw number as an argument :-(
- */
-#define MAX_CARDS 16
-/* #define MAX_CARDS (1 << (8-CARD_MINOR_BITS)) */
-
-#define DRIVER_RX_READY 0x0001
-#define DRIVER_TX_READY 0x0002
-#define DRIVER_TXMAP_SHIFT 2
-#define DRIVER_TXMAP_MASK 0x0c /* FIXME: 0xfc for 8-channel version */
-
-/*
- * for cosa->rxtx - indicates whether either transmit or receive is
- * in progress. These values are mean number of the bit.
- */
-#define TXBIT 0
-#define RXBIT 1
-#define IRQBIT 2
-
-#define COSA_MTU 2000 /* FIXME: I don't know this exactly */
-
-#undef DEBUG_DATA 1 /* Dump the data read or written to the channel */
-#undef DEBUG_IRQS 1 /* Print the message when the IRQ is received */
-#undef DEBUG_IO 1 /* Dump the I/O traffic */
-
-/* Maybe the following should be allocated dynamically */
-static struct cosa_data cosa_cards[MAX_CARDS];
-static int nr_cards = 0;
-
-#ifdef COSA_ISA_AUTOPROBE
-static int io[MAX_CARDS+1] = { 0x220, 0x228, 0x210, 0x218, 0, };
-/* NOTE: DMA is not autoprobed!!! */
-static int dma[MAX_CARDS+1] = { 1, 7, 1, 7, 1, 7, 1, 7, 0, };
-#else
-int io[MAX_CARDS+1] = { 0, };
-int dma[MAX_CARDS+1] = { 0, };
-#endif
-/* IRQ can be safely autoprobed */
-static int irq[MAX_CARDS+1] = { -1, -1, -1, -1, -1, -1, 0, };
-
-#ifdef MODULE
-MODULE_PARM(io, "1-" __MODULE_STRING(MAX_CARDS) "i");
-MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards");
-MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_CARDS) "i");
-MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards");
-MODULE_PARM(dma, "1-" __MODULE_STRING(MAX_CARDS) "i");
-MODULE_PARM_DESC(dma, "The DMA channels of the COSA or SRP cards");
-
-MODULE_AUTHOR("Jan \"Yenya\" Kasprzak, <kas@fi.muni.cz>");
-MODULE_DESCRIPTION("Modular driver for the COSA or SRP synchronous card");
-#endif
-
-/* I use this mainly for testing purposes */
-#ifdef COSA_SLOW_IO
-#define cosa_outb outb_p
-#define cosa_outw outw_p
-#define cosa_inb inb_p
-#define cosa_inw inw_p
-#else
-#define cosa_outb outb
-#define cosa_outw outw
-#define cosa_inb inb
-#define cosa_inw inw
-#endif
-
-#define is_8bit(cosa) (!(cosa->datareg & 0x08))
-
-#define cosa_getstatus(cosa) (cosa_inb(cosa->statusreg))
-#define cosa_putstatus(cosa, stat) (cosa_outb(stat, cosa->statusreg))
-#define cosa_getdata16(cosa) (cosa_inw(cosa->datareg))
-#define cosa_getdata8(cosa) (cosa_inb(cosa->datareg))
-#define cosa_putdata16(cosa, dt) (cosa_outw(dt, cosa->datareg))
-#define cosa_putdata8(cosa, dt) (cosa_outb(dt, cosa->datareg))
-
-/* Initialization stuff */
-static int cosa_probe(int ioaddr, int irq, int dma);
-
-/* HW interface */
-static void cosa_enable_rx(struct channel_data *chan);
-static void cosa_disable_rx(struct channel_data *chan);
-static int cosa_start_tx(struct channel_data *channel, char *buf, int size);
-static void cosa_kick(struct cosa_data *cosa);
-static int cosa_dma_able(struct channel_data *chan, char *buf, int data);
-
-/* SPPP/HDLC stuff */
-static void sppp_channel_init(struct channel_data *chan);
-static void sppp_channel_delete(struct channel_data *chan);
-static int cosa_sppp_open(struct net_device *d);
-static int cosa_sppp_close(struct net_device *d);
-static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *d);
-static char *sppp_setup_rx(struct channel_data *channel, int size);
-static int sppp_rx_done(struct channel_data *channel);
-static int sppp_tx_done(struct channel_data *channel, int size);
-static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
-static struct net_device_stats *cosa_net_stats(struct net_device *dev);
-
-/* Character device */
-static void chardev_channel_init(struct channel_data *chan);
-static char *chrdev_setup_rx(struct channel_data *channel, int size);
-static int chrdev_rx_done(struct channel_data *channel);
-static int chrdev_tx_done(struct channel_data *channel, int size);
-static long long cosa_lseek(struct file *file,
- long long offset, int origin);
-static ssize_t cosa_read(struct file *file,
- char *buf, size_t count, loff_t *ppos);
-static ssize_t cosa_write(struct file *file,
- const char *buf, size_t count, loff_t *ppos);
-static unsigned int cosa_poll(struct file *file, poll_table *poll);
-static int cosa_open(struct inode *inode, struct file *file);
-static int cosa_release(struct inode *inode, struct file *file);
-static int cosa_chardev_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg);
-#ifdef COSA_FASYNC_WORKING
-static int cosa_fasync(struct inode *inode, struct file *file, int on);
-#endif
-
-static struct file_operations cosa_fops = {
- cosa_lseek,
- cosa_read,
- cosa_write,
- NULL, /* readdir */
- cosa_poll,
- cosa_chardev_ioctl,
- NULL, /* mmap */
- cosa_open,
- NULL, /* flush */
- cosa_release,
- NULL, /* fsync */
-#ifdef COSA_FASYNC_WORKING
- cosa_fasync,
-#else
- NULL,
-#endif
- NULL, /* check media change */
- NULL, /* revalidate */
- NULL /* lock */
-};
-
-/* Ioctls */
-static int cosa_start(struct cosa_data *cosa, int address);
-static int cosa_reset(struct cosa_data *cosa);
-static int cosa_download(struct cosa_data *cosa, struct cosa_download *d);
-static int cosa_readmem(struct cosa_data *cosa, struct cosa_download *d);
-
-/* COSA/SRP ROM monitor */
-static int download(struct cosa_data *cosa, char *data, int addr, int len);
-static int startmicrocode(struct cosa_data *cosa, int address);
-static int readmem(struct cosa_data *cosa, char *data, int addr, int len);
-static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id);
-
-/* Auxilliary functions */
-static int get_wait_data(struct cosa_data *cosa);
-static int put_wait_data(struct cosa_data *cosa, int data);
-static int puthexnumber(struct cosa_data *cosa, int number);
-static void put_driver_status(struct cosa_data *cosa);
-static void put_driver_status_nolock(struct cosa_data *cosa);
-
-/* Interrupt handling */
-static void cosa_interrupt(int irq, void *cosa, struct pt_regs *regs);
-
-/* I/O ops debugging */
-#ifdef DEBUG_IO
-static void debug_data_in(struct cosa_data *cosa, int data);
-static void debug_data_out(struct cosa_data *cosa, int data);
-static void debug_data_cmd(struct cosa_data *cosa, int data);
-static void debug_status_in(struct cosa_data *cosa, int status);
-static void debug_status_out(struct cosa_data *cosa, int status);
-#endif
-
-
-/* ---------- Initialization stuff ---------- */
-
-#ifdef MODULE
-int init_module(void)
-#else
-static int __init cosa_init(void)
-#endif
-{
- int i;
- printk(KERN_INFO "cosa v1.06 (c) 1997-8 Jan Kasprzak <kas@fi.muni.cz>\n");
-#ifdef __SMP__
- printk(KERN_INFO "cosa: SMP found. Please mail any success/failure reports to the author.\n");
-#endif
- if (cosa_major > 0) {
- if (register_chrdev(cosa_major, "cosa", &cosa_fops)) {
- printk(KERN_WARNING "cosa: unable to get major %d\n",
- cosa_major);
- return -EIO;
- }
- } else {
- if (!(cosa_major=register_chrdev(0, "cosa", &cosa_fops))) {
- printk(KERN_WARNING "cosa: unable to register chardev\n");
- return -EIO;
- }
- }
- for (i=0; i<MAX_CARDS; i++)
- cosa_cards[i].num = -1;
- for (i=0; io[i] != 0 && i < MAX_CARDS; i++)
- cosa_probe(io[i], irq[i], dma[i]);
- if (!nr_cards) {
- printk(KERN_WARNING "cosa: no devices found.\n");
- unregister_chrdev(cosa_major, "cosa");
- return -ENODEV;
- }
- return 0;
-}
-
-#ifdef MODULE
-void cleanup_module (void)
-{
- struct cosa_data *cosa;
- printk(KERN_INFO "Unloading the cosa module\n");
-
- for (cosa=cosa_cards; nr_cards--; cosa++) {
- int i;
- /* Clean up the per-channel data */
- for (i=0; i<cosa->nchannels; i++) {
- /* Chardev driver has no alloc'd per-channel data */
- sppp_channel_delete(cosa->chan+i);
- }
- /* Clean up the per-card data */
- kfree(cosa->chan);
- kfree(cosa->bouncebuf);
- free_irq(cosa->irq, cosa);
- free_dma(cosa->dma);
- release_region(cosa->datareg,is_8bit(cosa)?2:4);
- }
- unregister_chrdev(cosa_major, "cosa");
-}
-#endif
-
-/*
- * This function should register all the net devices needed for the
- * single channel.
- */
-static __inline__ void channel_init(struct channel_data *chan)
-{
- sprintf(chan->name, "cosa%dc%d", chan->cosa->num, chan->num);
-
- /* Initialize the chardev data structures */
- chardev_channel_init(chan);
-
- /* Register the sppp interface */
- sppp_channel_init(chan);
-}
-
-static int cosa_probe(int base, int irq, int dma)
-{
- struct cosa_data *cosa = cosa_cards+nr_cards;
- int i;
-
- memset(cosa, 0, sizeof(struct cosa_data));
-
- /* Checking validity of parameters: */
- /* IRQ should be 2-7 or 10-15; negative IRQ means autoprobe */
- if ((irq >= 0 && irq < 2) || irq > 15 || (irq < 10 && irq > 7)) {
- printk (KERN_INFO "cosa_probe: invalid IRQ %d\n", irq);
- return -1;
- }
- /* I/O address should be between 0x100 and 0x3ff and should be
- * multiple of 8. */
- if (base < 0x100 || base > 0x3ff || base & 0x7) {
- printk (KERN_INFO "cosa_probe: invalid I/O address 0x%x\n",
- base);
- return -1;
- }
- /* DMA should be 0,1 or 3-7 */
- if (dma < 0 || dma == 4 || dma > 7) {
- printk (KERN_INFO "cosa_probe: invalid DMA %d\n", dma);
- return -1;
- }
- /* and finally, on 16-bit COSA DMA should be 4-7 and
- * I/O base should not be multiple of 0x10 */
- if (((base & 0x8) && dma < 4) || (!(base & 0x8) && dma > 3)) {
- printk (KERN_INFO "cosa_probe: 8/16 bit base and DMA mismatch"
- " (base=0x%x, dma=%d)\n", base, dma);
- return -1;
- }
-
- cosa->dma = dma;
- cosa->datareg = base;
- cosa->statusreg = is_8bit(cosa)?base+1:base+2;
- spin_lock_init(&cosa->lock);
-
- if (check_region(base, is_8bit(cosa)?2:4))
- return -1;
-
- if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) {
- printk(KERN_DEBUG "cosa: probe at 0x%x failed.\n", base);
- return -1;
- }
-
- /* Test the validity of identification string */
- if (!strncmp(cosa->id_string, "SRP", 3))
- cosa->type = "srp";
- else if (!strncmp(cosa->id_string, "COSA", 4))
- cosa->type = is_8bit(cosa)? "cosa8": "cosa16";
- else {
-/* Print a warning only if we are not autoprobing */
-#ifndef COSA_ISA_AUTOPROBE
- printk(KERN_INFO "cosa: valid signature not found at 0x%x.\n",
- base);
-#endif
- return -1;
- }
-
- /* Now do IRQ autoprobe */
- if (irq < 0) {
- unsigned long irqs;
-/* printk(KERN_INFO "IRQ autoprobe\n"); */
- sti();
- irqs = probe_irq_on();
- /*
- * Enable interrupt on tx buffer empty (it sure is)
- * really sure ?
- * FIXME: When this code is not used as module, we should
- * probably call udelay() instead of the interruptible sleep.
- */
- current->state = TASK_INTERRUPTIBLE;
- cosa_putstatus(cosa, SR_TX_INT_ENA);
- schedule_timeout(30);
- current->state = TASK_RUNNING;
- irq = probe_irq_off(irqs);
- /* Disable all IRQs from the card */
- cosa_putstatus(cosa, 0);
- /* Empty the received data register */
- cosa_getdata8(cosa);
-
- if (irq < 0) {
- printk (KERN_INFO "cosa IRQ autoprobe: multiple interrupts obtained (%d, board at 0x%x)\n",
- irq, cosa->datareg);
- return -1;
- }
- if (irq == 0) {
- printk (KERN_INFO "cosa IRQ autoprobe: no interrupt obtained (board at 0x%x)\n",
- cosa->datareg);
- /* return -1; */
- }
- }
-
- cosa->irq = irq;
- cosa->num = nr_cards;
- cosa->usage = 0;
- cosa->nchannels = 2; /* FIXME: how to determine this? */
-
- request_region(base, is_8bit(cosa)?2:4, cosa->type);
- if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa))
- goto bad1;
- if (request_dma(cosa->dma, cosa->type)) {
- free_irq(cosa->irq, cosa);
-bad1: release_region(cosa->datareg,is_8bit(cosa)?2:4);
- printk(KERN_NOTICE "cosa%d: allocating resources failed\n",
- cosa->num);
- return -1;
- }
-
- cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL|GFP_DMA);
- sprintf(cosa->name, "cosa%d", cosa->num);
-
- /* Initialize the per-channel data */
- cosa->chan = kmalloc(sizeof(struct channel_data)*cosa->nchannels,
- GFP_KERNEL);
- memset(cosa->chan, 0, sizeof(struct channel_data)*cosa->nchannels);
- for (i=0; i<cosa->nchannels; i++) {
- cosa->chan[i].cosa = cosa;
- cosa->chan[i].num = i;
- channel_init(cosa->chan+i);
- }
-
- printk (KERN_INFO "cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n",
- cosa->num, cosa->id_string, cosa->type,
- cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels);
-
- return nr_cards++;
-}
-
-
-/*---------- SPPP/HDLC netdevice ---------- */
-
-static void sppp_channel_init(struct channel_data *chan)
-{
- struct net_device *d;
- sppp_attach(&chan->pppdev);
- d=&chan->pppdev.dev;
- d->name = chan->name;
- d->base_addr = chan->cosa->datareg;
- d->irq = chan->cosa->irq;
- d->dma = chan->cosa->dma;
- d->priv = chan;
- d->init = NULL;
- d->open = cosa_sppp_open;
- d->stop = cosa_sppp_close;
- d->hard_start_xmit = cosa_sppp_tx;
- d->do_ioctl = cosa_sppp_ioctl;
- d->get_stats = cosa_net_stats;
- dev_init_buffers(d);
- if (register_netdev(d) == -1) {
- printk(KERN_WARNING "%s: register_netdev failed.\n", d->name);
- sppp_detach(&chan->pppdev.dev);
- return;
- }
-}
-
-static void sppp_channel_delete(struct channel_data *chan)
-{
- sppp_detach(&chan->pppdev.dev);
- unregister_netdev(&chan->pppdev.dev);
-}
-
-
-static int cosa_sppp_open(struct net_device *d)
-{
- struct channel_data *chan = d->priv;
- int err, flags;
-
- spin_lock_irqsave(&chan->cosa->lock, flags);
- if (chan->usage != 0) {
- printk(KERN_WARNING "%s: sppp_open called with usage count %d\n",
- chan->name, chan->usage);
- spin_unlock_irqrestore(&chan->cosa->lock, flags);
- return -EBUSY;
- }
- chan->setup_rx = sppp_setup_rx;
- chan->tx_done = sppp_tx_done;
- chan->rx_done = sppp_rx_done;
- chan->usage=-1;
- chan->cosa->usage++;
- MOD_INC_USE_COUNT;
- spin_unlock_irqrestore(&chan->cosa->lock, flags);
-
- err = sppp_open(d);
- if (err) {
- spin_lock_irqsave(&chan->cosa->lock, flags);
- chan->usage=0;
- chan->cosa->usage--;
- MOD_DEC_USE_COUNT;
-
- spin_unlock_irqrestore(&chan->cosa->lock, flags);
- return err;
- }
-
- d->tbusy = 0;
- cosa_enable_rx(chan);
- return 0;
-}
-
-static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev)
-{
- struct channel_data *chan = dev->priv;
-
- if (dev->tbusy) {
- if (time_before(jiffies, dev->trans_start+2*HZ))
- return 1; /* Two seconds timeout */
- if (test_bit(RXBIT, &chan->cosa->rxtx)) {
- chan->stats.rx_errors++;
- chan->stats.rx_missed_errors++;
- } else {
- chan->stats.tx_errors++;
- chan->stats.tx_aborted_errors++;
- }
- cosa_kick(chan->cosa);
- if (chan->tx_skb) {
- dev_kfree_skb(chan->tx_skb);
- chan->tx_skb = 0;
- }
- dev->tbusy = 0;
- }
- if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) {
- printk(KERN_WARNING "%s: Transmitter access conflict.\n", dev->name);
- return 1;
- }
-
- chan->tx_skb = skb;
- dev->trans_start = jiffies;
- cosa_start_tx(chan, skb->data, skb->len);
- return 0;
-}
-
-static int cosa_sppp_close(struct net_device *d)
-{
- struct channel_data *chan = d->priv;
- int flags;
-
- sppp_close(d);
- d->tbusy = 1;
- cosa_disable_rx(chan);
- spin_lock_irqsave(&chan->cosa->lock, flags);
- if (chan->rx_skb) {
- kfree_skb(chan->rx_skb);
- chan->rx_skb = 0;
- }
- if (chan->tx_skb) {
- kfree_skb(chan->tx_skb);
- chan->tx_skb = 0;
- }
- chan->usage=0;
- chan->cosa->usage--;
- MOD_DEC_USE_COUNT;
- spin_unlock_irqrestore(&chan->cosa->lock, flags);
- return 0;
-}
-
-static char *sppp_setup_rx(struct channel_data *chan, int size)
-{
- /*
- * We can safely fall back to non-dma-able memory, because we have
- * the cosa->bouncebuf pre-allocated.
- */
- if (chan->rx_skb)
- kfree_skb(chan->rx_skb);
- chan->rx_skb = dev_alloc_skb(size);
- if (chan->rx_skb == NULL) {
- printk(KERN_NOTICE "%s: Memory squeeze, dropping packet\n",
- chan->name);
- chan->stats.rx_dropped++;
- return NULL;
- }
- chan->pppdev.dev.trans_start = jiffies;
- return skb_put(chan->rx_skb, size);
-}
-
-static int sppp_rx_done(struct channel_data *chan)
-{
- if (!chan->rx_skb) {
- printk(KERN_WARNING "%s: rx_done with empty skb!\n",
- chan->name);
- chan->stats.rx_errors++;
- chan->stats.rx_frame_errors++;
- return 0;
- }
- chan->rx_skb->protocol = htons(ETH_P_WAN_PPP);
- chan->rx_skb->dev = &chan->pppdev.dev;
- chan->rx_skb->mac.raw = chan->rx_skb->data;
- chan->stats.rx_packets++;
- chan->stats.rx_bytes += chan->cosa->rxsize;
- netif_rx(chan->rx_skb);
- chan->rx_skb = 0;
- chan->pppdev.dev.trans_start = jiffies;
- return 0;
-}
-
-/* ARGSUSED */
-static int sppp_tx_done(struct channel_data *chan, int size)
-{
- if (!chan->tx_skb) {
- printk(KERN_WARNING "%s: tx_done with empty skb!\n",
- chan->name);
- chan->stats.tx_errors++;
- chan->stats.tx_aborted_errors++;
- return 1;
- }
- dev_kfree_skb(chan->tx_skb);
- chan->tx_skb = 0;
- chan->stats.tx_packets++;
- chan->stats.tx_bytes += size;
- chan->pppdev.dev.tbusy = 0;
- mark_bh(NET_BH);
- return 1;
-}
-
-static struct net_device_stats *cosa_net_stats(struct net_device *dev)
-{
- struct channel_data *chan = dev->priv;
- return &chan->stats;
-}
-
-
-/*---------- Character device ---------- */
-
-static void chardev_channel_init(struct channel_data *chan)
-{
- init_MUTEX(&chan->rsem);
- init_MUTEX(&chan->wsem);
-}
-
-static long long cosa_lseek(struct file * file,
- long long offset, int origin)
-{
- return -ESPIPE;
-}
-
-static ssize_t cosa_read(struct file *file,
- char *buf, size_t count, loff_t *ppos)
-{
- DECLARE_WAITQUEUE(wait, current);
- int flags;
- struct channel_data *chan = (struct channel_data *)file->private_data;
- struct cosa_data *cosa = chan->cosa;
- char *kbuf;
-
- if (down_interruptible(&chan->rsem))
- return -ERESTARTSYS;
-
- if ((chan->rxdata = kmalloc(COSA_MTU, GFP_DMA|GFP_KERNEL)) == NULL) {
- printk(KERN_INFO "%s: cosa_read() - OOM\n", cosa->name);
- up(&chan->rsem);
- return -ENOMEM;
- }
-
- chan->rx_status = 0;
- cosa_enable_rx(chan);
- spin_lock_irqsave(&cosa->lock, flags);
- add_wait_queue(&chan->rxwaitq, &wait);
- while(!chan->rx_status) {
- current->state = TASK_INTERRUPTIBLE;
- spin_unlock_irqrestore(&cosa->lock, flags);
- schedule();
- spin_lock_irqsave(&cosa->lock, flags);
- if (signal_pending(current) && chan->rx_status == 0) {
- chan->rx_status = 1;
- remove_wait_queue(&chan->rxwaitq, &wait);
- current->state = TASK_RUNNING;
- spin_unlock_irqrestore(&cosa->lock, flags);
- up(&chan->rsem);
- return -ERESTARTSYS;
- }
- }
- remove_wait_queue(&chan->rxwaitq, &wait);
- current->state = TASK_RUNNING;
- kbuf = chan->rxdata;
- count = chan->rxsize;
- spin_unlock_irqrestore(&cosa->lock, flags);
- up(&chan->rsem);
-
- if (copy_to_user(buf, kbuf, count)) {
- kfree(buf);
- return -EFAULT;
- }
- kfree(kbuf);
- return count;
-}
-
-static char *chrdev_setup_rx(struct channel_data *chan, int size)
-{
- /* Expect size <= COSA_MTU */
- chan->rxsize = size;
- return chan->rxdata;
-}
-
-static int chrdev_rx_done(struct channel_data *chan)
-{
- if (chan->rx_status) { /* Reader has died */
- kfree(chan->rxdata);
- up(&chan->wsem);
- }
- chan->rx_status = 1;
- wake_up_interruptible(&chan->rxwaitq);
- return 1;
-}
-
-
-static ssize_t cosa_write(struct file *file,
- const char *buf, size_t count, loff_t *ppos)
-{
- struct channel_data *chan = (struct channel_data *)file->private_data;
- DECLARE_WAITQUEUE(wait, current);
- struct cosa_data *cosa = chan->cosa;
- unsigned int flags;
- char *kbuf;
-
- if (down_interruptible(&chan->wsem))
- return -ERESTARTSYS;
-
- if (count > COSA_MTU)
- count = COSA_MTU;
-
- /* Allocate the buffer */
- if ((kbuf = kmalloc(count, GFP_KERNEL|GFP_DMA)) == NULL) {
- printk(KERN_NOTICE "%s: cosa_write() OOM - dropping packet\n",
- cosa->name);
- up(&chan->wsem);
- return -ENOMEM;
- }
- if (copy_from_user(kbuf, buf, count)) {
- up(&chan->wsem);
- kfree(kbuf);
- return -EFAULT;
- }
- chan->tx_status=0;
- cosa_start_tx(chan, kbuf, count);
-
- spin_lock_irqsave(&cosa->lock, flags);
- add_wait_queue(&chan->txwaitq, &wait);
- while(!chan->tx_status) {
- current->state = TASK_INTERRUPTIBLE;
- spin_unlock_irqrestore(&cosa->lock, flags);
- schedule();
- spin_lock_irqsave(&cosa->lock, flags);
- if (signal_pending(current) && chan->tx_status == 0) {
- chan->tx_status = 1;
- remove_wait_queue(&chan->txwaitq, &wait);
- current->state = TASK_RUNNING;
- chan->tx_status = 1;
- spin_unlock_irqrestore(&cosa->lock, flags);
- return -ERESTARTSYS;
- }
- }
- remove_wait_queue(&chan->txwaitq, &wait);
- current->state = TASK_RUNNING;
- up(&chan->wsem);
- spin_unlock_irqrestore(&cosa->lock, flags);
- kfree(kbuf);
- return count;
-}
-
-static int chrdev_tx_done(struct channel_data *chan, int size)
-{
- if (chan->tx_status) { /* Writer was interrupted */
- kfree(chan->txbuf);
- up(&chan->wsem);
- }
- chan->tx_status = 1;
- wake_up_interruptible(&chan->txwaitq);
- return 1;
-}
-
-static unsigned int cosa_poll(struct file *file, poll_table *poll)
-{
- printk(KERN_INFO "cosa_poll is here\n");
- return 0;
-}
-
-static int cosa_open(struct inode *inode, struct file *file)
-{
- struct cosa_data *cosa;
- struct channel_data *chan;
- unsigned long flags;
- int n;
-
- if ((n=MINOR(file->f_dentry->d_inode->i_rdev)>>CARD_MINOR_BITS)
- >= nr_cards)
- return -ENODEV;
- cosa = cosa_cards+n;
-
- if ((n=MINOR(file->f_dentry->d_inode->i_rdev)
- & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels)
- return -ENODEV;
- chan = cosa->chan + n;
-
- file->private_data = chan;
-
- spin_lock_irqsave(&cosa->lock, flags);
-
- if (chan->usage < 0) { /* in netdev mode */
- spin_unlock_irqrestore(&cosa->lock, flags);
- return -EBUSY;
- }
- cosa->usage++;
- chan->usage++;
-
- chan->tx_done = chrdev_tx_done;
- chan->setup_rx = chrdev_setup_rx;
- chan->rx_done = chrdev_rx_done;
-#ifdef MODULE
- MOD_INC_USE_COUNT;
-#endif
- spin_unlock_irqrestore(&cosa->lock, flags);
- return 0;
-}
-
-static int cosa_release(struct inode *inode, struct file *file)
-{
- struct channel_data *channel = (struct channel_data *)file->private_data;
- struct cosa_data *cosa = channel->cosa;
- unsigned long flags;
-
- spin_lock_irqsave(&cosa->lock, flags);
- cosa->usage--;
- channel->usage--;
-#ifdef MODULE
- MOD_DEC_USE_COUNT;
-#endif
- spin_unlock_irqrestore(&cosa->lock, flags);
- return 0;
-}
-
-#ifdef COSA_FASYNC_WORKING
-static struct fasync_struct *fasync[256] = { NULL, };
-
-/* To be done ... */
-static int cosa_fasync(struct inode *inode, struct file *file, int on)
-{
- int port = MINOR(inode->i_rdev);
- int rv = fasync_helper(inode, file, on, &fasync[port]);
- return rv < 0 ? rv : 0;
-}
-#endif
-
-
-/* ---------- Ioctls ---------- */
-
-/*
- * Ioctl subroutines can safely be made inline, because they are called
- * only from cosa_ioctl().
- */
-static inline int cosa_reset(struct cosa_data *cosa)
-{
- char idstring[COSA_MAX_ID_STRING];
- if (cosa->usage > 1)
- printk(KERN_INFO "cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n",
- cosa->num, cosa->usage);
- if (cosa_reset_and_read_id(cosa, idstring) < 0) {
- printk(KERN_NOTICE "cosa%d: reset failed\n", cosa->num);
- return -EIO;
- }
- printk(KERN_INFO "cosa%d: resetting device: %s\n", cosa->num,
- idstring);
- return 0;
-}
-
-/* High-level function to download data into COSA memory. Calls download() */
-static inline int cosa_download(struct cosa_data *cosa, struct cosa_download *d)
-{
- int i;
- int addr, len;
- char *code;
-
- if (cosa->usage > 1)
- printk(KERN_INFO "cosa%d: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n",
- cosa->num, cosa->usage);
-#if 0
- if (cosa->status != CARD_STATUS_RESETED && cosa->status != CARD_STATUS_DOWNLOADED) {
- printk(KERN_NOTICE "cosa%d: reset the card first (status %d).\n",
- cosa->num, cosa->status);
- return -EPERM;
- }
-#endif
- get_user_ret(addr, &(d->addr), -EFAULT);
- get_user_ret(len, &(d->len), -EFAULT);
- get_user_ret(code, &(d->code), -EFAULT);
-
- if (d->addr < 0 || d->addr > COSA_MAX_FIRMWARE_SIZE)
- return -EINVAL;
- if (d->len < 0 || d->len > COSA_MAX_FIRMWARE_SIZE)
- return -EINVAL;
-
- if ((i=download(cosa, d->code, len, addr)) < 0) {
- printk(KERN_NOTICE "cosa%d: microcode download failed: %d\n",
- cosa->num, i);
- return -EIO;
- }
- printk(KERN_INFO "cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n",
- cosa->num, len, addr);
- return 0;
-}
-
-/* High-level function to read COSA memory. Calls readmem() */
-static inline int cosa_readmem(struct cosa_data *cosa, struct cosa_download *d)
-{
- int i;
- int addr, len;
- char *code;
-
- if (cosa->usage > 1)
- printk(KERN_INFO "cosa%d: WARNING: readmem requested with "
- "cosa->usage > 1 (%d). Odd things may happen.\n",
- cosa->num, cosa->usage);
-#if 0
- if (cosa->status != CARD_STATUS_RESETED &&
- cosa->status != CARD_STATUS_DOWNLOADED) {
- printk(KERN_NOTICE "cosa%d: reset the card first (status %d).\n",
- cosa->num, cosa->status);
- return -EPERM;
- }
-#endif
- get_user_ret(addr, &(d->addr), -EFAULT);
- get_user_ret(len, &(d->len), -EFAULT);
- get_user_ret(code, &(d->code), -EFAULT);
-
- if ((i=readmem(cosa, d->code, len, addr)) < 0) {
- printk(KERN_NOTICE "cosa%d: reading memory failed: %d\n",
- cosa->num, i);
- return -EIO;
- }
- printk(KERN_INFO "cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n",
- cosa->num, len, addr);
- return 0;
-}
-
-/* High-level function to start microcode. Calls startmicrocode(). */
-static inline int cosa_start(struct cosa_data *cosa, int address)
-{
- int i;
-
- if (cosa->usage > 1)
- printk(KERN_INFO "cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n",
- cosa->num, cosa->usage);
-#if 0
- if (cosa->status != CARD_STATUS_DOWNLOADED) {
- printk(KERN_NOTICE "cosa%d: download the microcode first (status %d).\n",
- cosa->num, cosa->status);
- return -EPERM;
- }
-#endif
- if ((i=startmicrocode(cosa, address)) < 0) {
- printk(KERN_NOTICE "cosa%d: start microcode at 0x%04x failed: %d\n",
- cosa->num, address, i);
- return -EIO;
- }
- printk(KERN_INFO "cosa%d: starting microcode at 0x%04x\n",
- cosa->num, address);
- cosa->startaddr = address;
- return 0;
-}
-
-/* Buffer of size at least COSA_MAX_ID_STRING is expected */
-static inline int cosa_getidstr(struct cosa_data *cosa, char *string)
-{
- int l = strlen(cosa->id_string)+1;
- copy_to_user_ret(string, cosa->id_string, l, -EFAULT);
- return l;
-}
-
-/* Buffer of size at least COSA_MAX_ID_STRING is expected */
-static inline int cosa_gettype(struct cosa_data *cosa, char *string)
-{
- int l = strlen(cosa->type)+1;
- copy_to_user_ret(string, cosa->type, l, -EFAULT);
- return l;
-}
-
-static int cosa_ioctl_common(struct cosa_data *cosa,
- struct channel_data *channel, unsigned int cmd, unsigned long arg)
-{
- switch(cmd) {
- case COSAIORSET: /* Reset the device */
- if (!suser())
- return -EACCES;
- return cosa_reset(cosa);
- case COSAIOSTRT: /* Start the firmware */
- if (!suser())
- return -EACCES;
- return cosa_start(cosa, arg);
- case COSAIODOWNLD: /* Download the firmware */
- if (!suser())
- return -EACCES;
- return cosa_download(cosa, (struct cosa_download *)arg);
- case COSAIORMEM:
- if (!suser())
- return -EACCES;
- return cosa_readmem(cosa, (struct cosa_download *)arg);
- case COSAIORTYPE:
- return cosa_gettype(cosa, (char *)arg);
- case COSAIORIDSTR:
- return cosa_getidstr(cosa, (char *)arg);
-/*
- * These two are _very_ugly_hack_(tm). Don't even look at this.
- * Implementing this saved me few reboots after some process segfaulted
- * inside this module.
- */
-#ifdef MODULE
-#if 0
- case COSAIOMINC:
- MOD_INC_USE_COUNT;
- return 0;
- case COSAIOMDEC:
- MOD_DEC_USE_COUNT;
- return 0;
-#endif
-#endif
- case COSAIONRCARDS:
- return nr_cards;
- case COSAIONRCHANS:
- return cosa->nchannels;
- case COSAIOBMSET:
- if (!suser())
- return -EACCES;
- if (is_8bit(cosa))
- return -EINVAL;
- if (arg != COSA_BM_OFF && arg != COSA_BM_ON)
- return -EINVAL;
- cosa->busmaster = arg;
- return 0;
- case COSAIOBMGET:
- return cosa->busmaster;
- }
- return -ENOIOCTLCMD;
-}
-
-static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr,
- int cmd)
-{
- int rv;
- struct channel_data *chan = (struct channel_data *)dev->priv;
- rv = cosa_ioctl_common(chan->cosa, chan, cmd, (int)ifr->ifr_data);
- if (rv == -ENOIOCTLCMD) {
- return sppp_do_ioctl(dev, ifr, cmd);
- }
- return rv;
-}
-
-static int cosa_chardev_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct channel_data *channel = (struct channel_data *)file->private_data;
- struct cosa_data *cosa = channel->cosa;
- return cosa_ioctl_common(cosa, channel, cmd, arg);
-}
-
-
-/*---------- HW layer interface ---------- */
-
-/*
- * The higher layer can bind itself to the HW layer by setting the callbacks
- * in the channel_data structure and by using these routines.
- */
-static void cosa_enable_rx(struct channel_data *chan)
-{
- struct cosa_data *cosa = chan->cosa;
-
- if (!test_and_set_bit(chan->num, &cosa->rxbitmap))
- put_driver_status(cosa);
-}
-
-static void cosa_disable_rx(struct channel_data *chan)
-{
- struct cosa_data *cosa = chan->cosa;
-
- if (test_and_clear_bit(chan->num, &cosa->rxbitmap))
- put_driver_status(cosa);
-}
-
-/*
- * FIXME: This routine probably should check for cosa_start_tx() called when
- * the previous transmit is still unfinished. In this case the non-zero
- * return value should indicate to the caller that the queuing(sp?) up
- * the transmit has failed.
- */
-static int cosa_start_tx(struct channel_data *chan, char *buf, int len)
-{
- struct cosa_data *cosa = chan->cosa;
- int flags;
-#ifdef DEBUG_DATA
- int i;
-
- printk(KERN_INFO "cosa%dc%d: starting tx(0x%x)", chan->cosa->num,
- chan->num, len);
- for (i=0; i<len; i++)
- printk(" %02x", buf[i]&0xff);
- printk("\n");
-#endif
- spin_lock_irqsave(&cosa->lock, flags);
- chan->txbuf = buf;
- chan->txsize = len;
- if (len > COSA_MTU)
- chan->txsize = COSA_MTU;
- spin_unlock_irqrestore(&cosa->lock, flags);
-
- /* Tell the firmware we are ready */
- set_bit(chan->num, &cosa->txbitmap);
- put_driver_status(cosa);
-
- return 0;
-}
-
-static void put_driver_status(struct cosa_data *cosa)
-{
- unsigned flags=0;
- int status;
-
- spin_lock_irqsave(&cosa->lock, flags);
-
- status = (cosa->rxbitmap ? DRIVER_RX_READY : 0)
- | (cosa->txbitmap ? DRIVER_TX_READY : 0)
- | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT)
- &DRIVER_TXMAP_MASK : 0);
- if (!cosa->rxtx) {
- if (cosa->rxbitmap|cosa->txbitmap) {
- if (!cosa->enabled) {
- cosa_putstatus(cosa, SR_RX_INT_ENA);
-#ifdef DEBUG_IO
- debug_status_out(cosa, SR_RX_INT_ENA);
-#endif
- cosa->enabled = 1;
- }
- } else if (cosa->enabled) {
- cosa->enabled = 0;
- cosa_putstatus(cosa, 0);
-#ifdef DEBUG_IO
- debug_status_out(cosa, 0);
-#endif
- }
- cosa_putdata8(cosa, status);
-#ifdef DEBUG_IO
- debug_data_cmd(cosa, status);
-#endif
- }
- spin_unlock_irqrestore(&cosa->lock, flags);
-}
-
-static void put_driver_status_nolock(struct cosa_data *cosa)
-{
- int status;
-
- status = (cosa->rxbitmap ? DRIVER_RX_READY : 0)
- | (cosa->txbitmap ? DRIVER_TX_READY : 0)
- | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT)
- &DRIVER_TXMAP_MASK : 0);
-
- if (cosa->rxbitmap|cosa->txbitmap) {
- cosa_putstatus(cosa, SR_RX_INT_ENA);
-#ifdef DEBUG_IO
- debug_status_out(cosa, SR_RX_INT_ENA);
-#endif
- cosa->enabled = 1;
- } else {
- cosa_putstatus(cosa, 0);
-#ifdef DEBUG_IO
- debug_status_out(cosa, 0);
-#endif
- cosa->enabled = 0;
- }
- cosa_putdata8(cosa, status);
-#ifdef DEBUG_IO
- debug_data_cmd(cosa, status);
-#endif
-}
-
-/*
- * The "kickme" function: When the DMA times out, this is called to
- * clean up the driver status.
- * FIXME: Preliminary support, the interface is probably wrong.
- */
-static void cosa_kick(struct cosa_data *cosa)
-{
- unsigned flags, flags1;
- char *s = "Unknown";
-
- if (test_bit(RXBIT, &cosa->rxtx))
- s = "RX";
- if (test_bit(TXBIT, &cosa->rxtx))
- s = "TX";
-
- printk(KERN_INFO "%s: %s DMA timeout - restarting.\n", cosa->name, s);
- spin_lock_irqsave(&cosa->lock, flags);
- cosa->rxtx = 0;
-
- flags1 = claim_dma_lock();
- disable_dma(cosa->dma);
- clear_dma_ff(cosa->dma);
- release_dma_lock(flags1);
-
- /* FIXME: Anything else? */
- udelay(100);
- cosa_putstatus(cosa, 0);
- udelay(100);
- (void) cosa_getdata8(cosa);
- udelay(100);
- cosa_putdata8(cosa, 0);
- udelay(100);
- put_driver_status_nolock(cosa);
- spin_unlock_irqrestore(&cosa->lock, flags);
-}
-
-/*
- * Check if the whole buffer is DMA-able. It means it is below the 16M of
- * physical memory and doesn't span the 64k boundary. For now it seems
- * SKB's never do this, but we'll check this anyway.
- */
-static int cosa_dma_able(struct channel_data *chan, char *buf, int len)
-{
- static int count = 0;
- unsigned long b = (unsigned long)buf;
- if (b+len >= MAX_DMA_ADDRESS)
- return 0;
- if ((b^ (b+len)) & 0x10000) {
- if (count++ < 5)
- printk(KERN_INFO "%s: packet spanning a 64k boundary\n",
- chan->name);
- return 0;
- }
- return 1;
-}
-
-
-/* ---------- The SRP/COSA ROM monitor functions ---------- */
-
-/*
- * Downloading SRP microcode: say "w" to SRP monitor, it answers by "w=",
- * drivers need to say 4-digit hex number meaning start address of the microcode
- * separated by a single space. Monitor replies by saying " =". Now driver
- * has to write 4-digit hex number meaning the last byte address ended
- * by a single space. Monitor has to reply with a space. Now the download
- * begins. After the download monitor replies with "\r\n." (CR LF dot).
- */
-static int download(struct cosa_data *cosa, char *microcode, int length, int address)
-{
- int i;
-
- if (put_wait_data(cosa, 'w') == -1) return -1;
- if ((i=get_wait_data(cosa)) != 'w') { printk("dnld: 0x%04x\n",i); return -2;}
- if (get_wait_data(cosa) != '=') return -3;
-
- if (puthexnumber(cosa, address) < 0) return -4;
- if (put_wait_data(cosa, ' ') == -1) return -10;
- if (get_wait_data(cosa) != ' ') return -11;
- if (get_wait_data(cosa) != '=') return -12;
-
- if (puthexnumber(cosa, address+length-1) < 0) return -13;
- if (put_wait_data(cosa, ' ') == -1) return -18;
- if (get_wait_data(cosa) != ' ') return -19;
-
- while (length--) {
- char c;
-#ifndef SRP_DOWNLOAD_AT_BOOT
- get_user_ret(c,microcode, -23);
-#else
- c = *microcode;
-#endif
- if (put_wait_data(cosa, c) == -1)
- return -20;
- microcode++;
- }
-
- if (get_wait_data(cosa) != '\r') return -21;
- if (get_wait_data(cosa) != '\n') return -22;
- if (get_wait_data(cosa) != '.') return -23;
-#if 0
- printk(KERN_DEBUG "cosa%d: download completed.\n", cosa->num);
-#endif
- return 0;
-}
-
-
-/*
- * Starting microcode is done via the "g" command of the SRP monitor.
- * The chat should be the following: "g" "g=" "<addr><CR>"
- * "<CR><CR><LF><CR><LF>".
- */
-static int startmicrocode(struct cosa_data *cosa, int address)
-{
- if (put_wait_data(cosa, 'g') == -1) return -1;
- if (get_wait_data(cosa) != 'g') return -2;
- if (get_wait_data(cosa) != '=') return -3;
-
- if (puthexnumber(cosa, address) < 0) return -4;
- if (put_wait_data(cosa, '\r') == -1) return -5;
-
- if (get_wait_data(cosa) != '\r') return -6;
- if (get_wait_data(cosa) != '\r') return -7;
- if (get_wait_data(cosa) != '\n') return -8;
- if (get_wait_data(cosa) != '\r') return -9;
- if (get_wait_data(cosa) != '\n') return -10;
-#if 0
- printk(KERN_DEBUG "cosa%d: microcode started\n", cosa->num);
-#endif
- return 0;
-}
-
-/*
- * Reading memory is done via the "r" command of the SRP monitor.
- * The chat is the following "r" "r=" "<addr> " " =" "<last_byte> " " "
- * Then driver can read the data and the conversation is finished
- * by SRP monitor sending "<CR><LF>." (dot at the end).
- *
- * This routine is not needed during the normal operation and serves
- * for debugging purposes only.
- */
-static int readmem(struct cosa_data *cosa, char *microcode, int length, int address)
-{
- if (put_wait_data(cosa, 'r') == -1) return -1;
- if ((get_wait_data(cosa)) != 'r') return -2;
- if ((get_wait_data(cosa)) != '=') return -3;
-
- if (puthexnumber(cosa, address) < 0) return -4;
- if (put_wait_data(cosa, ' ') == -1) return -5;
- if (get_wait_data(cosa) != ' ') return -6;
- if (get_wait_data(cosa) != '=') return -7;
-
- if (puthexnumber(cosa, address+length-1) < 0) return -8;
- if (put_wait_data(cosa, ' ') == -1) return -9;
- if (get_wait_data(cosa) != ' ') return -10;
-
- while (length--) {
- char c;
- int i;
- if ((i=get_wait_data(cosa)) == -1) {
- printk (KERN_INFO "cosa: 0x%04x bytes remaining\n",
- length);
- return -11;
- }
- c=i;
-#if 1
- put_user_ret(c,microcode, -23);
-#else
- *microcode = c;
-#endif
- microcode++;
- }
-
- if (get_wait_data(cosa) != '\r') return -21;
- if (get_wait_data(cosa) != '\n') return -22;
- if (get_wait_data(cosa) != '.') return -23;
-#if 0
- printk(KERN_DEBUG "cosa%d: readmem completed.\n", cosa->num);
-#endif
- return 0;
-}
-
-/*
- * This function resets the device and reads the initial prompt
- * of the device's ROM monitor.
- */
-static int cosa_reset_and_read_id(struct cosa_data *cosa, char *idstring)
-{
- int i=0, id=0, prev=0, curr=0;
-
- /* Reset the card ... */
- cosa_putstatus(cosa, 0);
- cosa_getdata8(cosa);
- cosa_putstatus(cosa, SR_RST);
-#ifdef MODULE
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/2);
- current->state = TASK_RUNNING;
-#else
- udelay(5*100000);
-#endif
- /* Disable all IRQs from the card */
- cosa_putstatus(cosa, 0);
-
- /*
- * Try to read the ID string. The card then prints out the
- * identification string ended by the "\n\x2e".
- *
- * The following loop is indexed through i (instead of id)
- * to avoid looping forever when for any reason
- * the port returns '\r', '\n' or '\x2e' permanently.
- */
- for (i=0; i<COSA_MAX_ID_STRING-1; i++, prev=curr) {
- if ((curr = get_wait_data(cosa)) == -1) {
- return -1;
- }
- curr &= 0xff;
- if (curr != '\r' && curr != '\n' && curr != 0x2e)
- idstring[id++] = curr;
- if (curr == 0x2e && prev == '\n')
- break;
- }
- /* Perhaps we should fail when i==COSA_MAX_ID_STRING-1 ? */
- idstring[id] = '\0';
- return id;
-}
-
-
-/* ---------- Auxiliary routines for COSA/SRP monitor ---------- */
-
-/*
- * This routine gets the data byte from the card waiting for the SR_RX_RDY
- * bit to be set in a loop. It should be used in the exceptional cases
- * only (for example when resetting the card or downloading the firmware.
- */
-static int get_wait_data(struct cosa_data *cosa)
-{
- int retries = 1000;
-
- while (--retries) {
- /* read data and return them */
- if (cosa_getstatus(cosa) & SR_RX_RDY) {
- short r;
- r = cosa_getdata8(cosa);
-#if 0
- printk(KERN_INFO "cosa: get_wait_data returning after %d retries\n", 999-retries);
-#endif
- return r;
- }
- /* sleep if not ready to read */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(1);
- }
- printk(KERN_INFO "cosa: timeout in get_wait_data (status 0x%x)\n",
- cosa_getstatus(cosa));
- return -1;
-}
-
-/*
- * This routine puts the data byte to the card waiting for the SR_TX_RDY
- * bit to be set in a loop. It should be used in the exceptional cases
- * only (for example when resetting the card or downloading the firmware).
- */
-static int put_wait_data(struct cosa_data *cosa, int data)
-{
- int retries = 1000;
- while (--retries) {
- /* read data and return them */
- if (cosa_getstatus(cosa) & SR_TX_RDY) {
- cosa_putdata8(cosa, data);
-#if 0
- printk(KERN_INFO "Putdata: %d retries\n", 999-retries);
-#endif
- return 0;
- }
-#if 0
- /* sleep if not ready to read */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(1);
-#endif
- }
- printk(KERN_INFO "cosa%d: timeout in put_wait_data (status 0x%x)\n",
- cosa->num, cosa_getstatus(cosa));
- return -1;
-}
-
-/*
- * The following routine puts the hexadecimal number into the SRP monitor
- * and verifies the proper echo of the sent bytes. Returns 0 on success,
- * negative number on failure (-1,-3,-5,-7) means that put_wait_data() failed,
- * (-2,-4,-6,-8) means that reading echo failed.
- */
-static int puthexnumber(struct cosa_data *cosa, int number)
-{
- char temp[5];
- int i;
-
- /* Well, I should probably replace this by something faster. */
- sprintf(temp, "%04X", number);
- for (i=0; i<4; i++) {
- if (put_wait_data(cosa, temp[i]) == -1) {
- printk(KERN_NOTICE "cosa%d: puthexnumber failed to write byte %d\n",
- cosa->num, i);
- return -1-2*i;
- }
- if (get_wait_data(cosa) != temp[i]) {
- printk(KERN_NOTICE "cosa%d: puthexhumber failed to read echo of byte %d\n",
- cosa->num, i);
- return -2-2*i;
- }
- }
- return 0;
-}
-
-
-/* ---------- Interrupt routines ---------- */
-
-/*
- * There are three types of interrupt:
- * At the beginning of transmit - this handled is in tx_interrupt(),
- * at the beginning of receive - it is in rx_interrupt() and
- * at the end of transmit/receive - it is the eot_interrupt() function.
- * These functions are multiplexed by cosa_interrupt() according to the
- * COSA status byte. I have moved the rx/tx/eot interrupt handling into
- * separate functions to make it more readable. These functions are inline,
- * so there should be no overhead of function call.
- *
- * In the COSA bus-master mode, we need to tell the card the address of a
- * buffer. Unfortunately, COSA may be too slow for us, so we must busy-wait.
- * It's time to use the bottom half :-(
- */
-
-/*
- * Transmit interrupt routine - called when COSA is willing to obtain
- * data from the OS. The most tricky part of the routine is selection
- * of channel we (OS) want to send packet for. For SRP we should probably
- * use the round-robin approach. The newer COSA firmwares have a simple
- * flow-control - in the status word has bits 2 and 3 set to 1 means that the
- * channel 0 or 1 doesn't want to receive data.
- *
- * It seems there is a bug in COSA firmware (need to trace it further):
- * When the driver status says that the kernel has no more data for transmit
- * (e.g. at the end of TX DMA) and then the kernel changes its mind
- * (e.g. new packet is queued to hard_start_xmit()), the card issues
- * the TX interrupt but does not mark the channel as ready-to-transmit.
- * The fix seems to be to push the packet to COSA despite its request.
- * We first try to obey the card's opinion, and then fall back to forced TX.
- */
-static inline void tx_interrupt(struct cosa_data *cosa, int status)
-{
- unsigned long flags, flags1;
-#ifdef DEBUG_IRQS
- printk(KERN_INFO "cosa%d: SR_DOWN_REQUEST status=0x%04x\n",
- cosa->num, status);
-#endif
- spin_lock_irqsave(&cosa->lock, flags);
- set_bit(TXBIT, &cosa->rxtx);
- if (!test_bit(IRQBIT, &cosa->rxtx)) {
- /* flow control, see the comment above */
- int i=0;
- if (!cosa->txbitmap) {
- printk(KERN_WARNING "%s: No channel wants data "
- "in TX IRQ. Expect DMA timeout.",
- cosa->name);
- put_driver_status_nolock(cosa);
- clear_bit(TXBIT, &cosa->rxtx);
- spin_unlock_irqrestore(&cosa->lock, flags);
- return;
- }
- while(1) {
- cosa->txchan++;
- i++;
- if (cosa->txchan >= cosa->nchannels)
- cosa->txchan = 0;
- if (!(cosa->txbitmap & (1<<cosa->txchan)))
- continue;
- if (~status & (1 << (cosa->txchan+DRIVER_TXMAP_SHIFT)))
- break;
- /* in second pass, accept first ready-to-TX channel */
- if (i > cosa->nchannels) {
- /* Can be safely ignored */
- printk(KERN_DEBUG "%s: Forcing TX "
- "to not-ready channel %d\n",
- cosa->name, cosa->txchan);
- break;
- }
- }
-
- cosa->txsize = cosa->chan[cosa->txchan].txsize;
- if (cosa_dma_able(cosa->chan+cosa->txchan,
- cosa->chan[cosa->txchan].txbuf, cosa->txsize)) {
- cosa->txbuf = cosa->chan[cosa->txchan].txbuf;
- } else {
- memcpy(cosa->bouncebuf, cosa->chan[cosa->txchan].txbuf,
- cosa->txsize);
- cosa->txbuf = cosa->bouncebuf;
- }
- }
-
- if (is_8bit(cosa)) {
- if (!test_bit(IRQBIT, &cosa->rxtx)) {
- cosa_putstatus(cosa, SR_TX_INT_ENA);
- cosa_putdata8(cosa, ((cosa->txchan << 5) & 0xe0)|
- ((cosa->txsize >> 8) & 0x1f));
-#ifdef DEBUG_IO
- debug_status_out(cosa, SR_TX_INT_ENA);
- debug_data_out(cosa, ((cosa->txchan << 5) & 0xe0)|
- ((cosa->txsize >> 8) & 0x1f));
- debug_data_in(cosa, cosa_getdata8(cosa));
-#else
- cosa_getdata8(cosa);
-#endif
- set_bit(IRQBIT, &cosa->rxtx);
- spin_unlock_irqrestore(&cosa->lock, flags);
- return;
- } else {
- clear_bit(IRQBIT, &cosa->rxtx);
- cosa_putstatus(cosa, 0);
- cosa_putdata8(cosa, cosa->txsize&0xff);
-#ifdef DEBUG_IO
- debug_status_out(cosa, 0);
- debug_data_out(cosa, cosa->txsize&0xff);
-#endif
- }
- } else {
- cosa_putstatus(cosa, SR_TX_INT_ENA);
- cosa_putdata16(cosa, ((cosa->txchan<<13) & 0xe000)
- | (cosa->txsize & 0x1fff));
-#ifdef DEBUG_IO
- debug_status_out(cosa, SR_TX_INT_ENA);
- debug_data_out(cosa, ((cosa->txchan<<13) & 0xe000)
- | (cosa->txsize & 0x1fff));
- debug_data_in(cosa, cosa_getdata8(cosa));
- debug_status_out(cosa, 0);
-#else
- cosa_getdata8(cosa);
-#endif
- cosa_putstatus(cosa, 0);
- }
-
- if (cosa->busmaster) {
- unsigned long addr = virt_to_bus(cosa->txbuf);
- int count=0;
- printk(KERN_INFO "busmaster IRQ\n");
- while (!(cosa_getstatus(cosa)&SR_TX_RDY)) {
- count++;
- udelay(10);
- if (count > 1000) break;
- }
- printk(KERN_INFO "status %x\n", cosa_getstatus(cosa));
- printk(KERN_INFO "ready after %d loops\n", count);
- cosa_putdata16(cosa, (addr >> 16)&0xffff);
-
- count = 0;
- while (!(cosa_getstatus(cosa)&SR_TX_RDY)) {
- count++;
- if (count > 1000) break;
- udelay(10);
- }
- printk(KERN_INFO "ready after %d loops\n", count);
- cosa_putdata16(cosa, addr &0xffff);
- flags1 = claim_dma_lock();
- set_dma_mode(cosa->dma, DMA_MODE_CASCADE);
- enable_dma(cosa->dma);
- release_dma_lock(flags1);
- } else {
- /* start the DMA */
- flags1 = claim_dma_lock();
- disable_dma(cosa->dma);
- clear_dma_ff(cosa->dma);
- set_dma_mode(cosa->dma, DMA_MODE_WRITE);
- set_dma_addr(cosa->dma, virt_to_bus(cosa->txbuf));
- set_dma_count(cosa->dma, cosa->txsize);
- enable_dma(cosa->dma);
- release_dma_lock(flags1);
- }
- cosa_putstatus(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA);
-#ifdef DEBUG_IO
- debug_status_out(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA);
-#endif
- spin_unlock_irqrestore(&cosa->lock, flags);
-}
-
-static inline void rx_interrupt(struct cosa_data *cosa, int status)
-{
- unsigned long flags;
-#ifdef DEBUG_IRQS
- printk(KERN_INFO "cosa%d: SR_UP_REQUEST\n", cosa->num);
-#endif
-
- spin_lock_irqsave(&cosa->lock, flags);
- set_bit(RXBIT, &cosa->rxtx);
-
- if (is_8bit(cosa)) {
- if (!test_bit(IRQBIT, &cosa->rxtx)) {
- set_bit(IRQBIT, &cosa->rxtx);
- put_driver_status_nolock(cosa);
- cosa->rxsize = cosa_getdata8(cosa) <<8;
-#ifdef DEBUG_IO
- debug_data_in(cosa, cosa->rxsize >> 8);
-#endif
- spin_unlock_irqrestore(&cosa->lock, flags);
- return;
- } else {
- clear_bit(IRQBIT, &cosa->rxtx);
- cosa->rxsize |= cosa_getdata8(cosa) & 0xff;
-#ifdef DEBUG_IO
- debug_data_in(cosa, cosa->rxsize & 0xff);
-#endif
-#if 0
- printk(KERN_INFO "cosa%d: receive rxsize = (0x%04x).\n",
- cosa->num, cosa->rxsize);
-#endif
- }
- } else {
- cosa->rxsize = cosa_getdata16(cosa);
-#ifdef DEBUG_IO
- debug_data_in(cosa, cosa->rxsize);
-#endif
-#if 0
- printk(KERN_INFO "cosa%d: receive rxsize = (0x%04x).\n",
- cosa->num, cosa->rxsize);
-#endif
- }
- if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) {
- printk(KERN_WARNING "%s: rx for unknown channel (0x%04x)\n",
- cosa->name, cosa->rxsize);
- spin_unlock_irqrestore(&cosa->lock, flags);
- goto reject;
- }
- cosa->rxchan = cosa->chan + ((cosa->rxsize & 0xe000) >> 13);
- cosa->rxsize &= 0x1fff;
- spin_unlock_irqrestore(&cosa->lock, flags);
-
- cosa->rxbuf = NULL;
- if (cosa->rxchan->setup_rx)
- cosa->rxbuf = cosa->rxchan->setup_rx(cosa->rxchan, cosa->rxsize);
-
- if (!cosa->rxbuf) {
-reject: /* Reject the packet */
- printk(KERN_INFO "cosa%d: rejecting packet on channel %d\n",
- cosa->num, cosa->rxchan->num);
- cosa->rxbuf = cosa->bouncebuf;
- }
-
- /* start the DMA */
- flags = claim_dma_lock();
- disable_dma(cosa->dma);
- clear_dma_ff(cosa->dma);
- set_dma_mode(cosa->dma, DMA_MODE_READ);
- if (cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize & 0x1fff)) {
- set_dma_addr(cosa->dma, virt_to_bus(cosa->rxbuf));
- } else {
- set_dma_addr(cosa->dma, virt_to_bus(cosa->bouncebuf));
- }
- set_dma_count(cosa->dma, (cosa->rxsize&0x1fff));
- enable_dma(cosa->dma);
- release_dma_lock(flags);
- spin_lock_irqsave(&cosa->lock, flags);
- cosa_putstatus(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA);
- if (!is_8bit(cosa) && (status & SR_TX_RDY))
- cosa_putdata8(cosa, DRIVER_RX_READY);
-#ifdef DEBUG_IO
- debug_status_out(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA);
- if (!is_8bit(cosa) && (status & SR_TX_RDY))
- debug_data_cmd(cosa, DRIVER_RX_READY);
-#endif
- spin_unlock_irqrestore(&cosa->lock, flags);
-}
-
-static void inline eot_interrupt(struct cosa_data *cosa, int status)
-{
- unsigned long flags, flags1;
- spin_lock_irqsave(&cosa->lock, flags);
- flags1 = claim_dma_lock();
- disable_dma(cosa->dma);
- clear_dma_ff(cosa->dma);
- release_dma_lock(flags1);
- if (test_bit(TXBIT, &cosa->rxtx)) {
- struct channel_data *chan = cosa->chan+cosa->txchan;
- if (chan->tx_done)
- if (chan->tx_done(chan, cosa->txsize))
- clear_bit(chan->num, &cosa->txbitmap);
- } else if (test_bit(RXBIT, &cosa->rxtx)) {
-#ifdef DEBUG_DATA
- {
- int i;
- printk(KERN_INFO "cosa%dc%d: done rx(0x%x)", cosa->num,
- cosa->rxchan->num, cosa->rxsize);
- for (i=0; i<cosa->rxsize; i++)
- printk (" %02x", cosa->rxbuf[i]&0xff);
- printk("\n");
- }
-#endif
- /* Packet for unknown channel? */
- if (cosa->rxbuf == cosa->bouncebuf)
- goto out;
- if (!cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize))
- memcpy(cosa->rxbuf, cosa->bouncebuf, cosa->rxsize);
- if (cosa->rxchan->rx_done)
- if (cosa->rxchan->rx_done(cosa->rxchan))
- clear_bit(cosa->rxchan->num, &cosa->rxbitmap);
- } else {
- printk(KERN_NOTICE "cosa%d: unexpected EOT interrupt\n",
- cosa->num);
- }
- /*
- * Clear the RXBIT, TXBIT and IRQBIT (the latest should be
- * cleared anyway). We should do it as soon as possible
- * so that we can tell the COSA we are done and to give it a time
- * for recovery.
- */
-out:
- cosa->rxtx = 0;
- put_driver_status_nolock(cosa);
- spin_unlock_irqrestore(&cosa->lock, flags);
-}
-
-static void cosa_interrupt(int irq, void *cosa_, struct pt_regs *regs)
-{
- unsigned status;
- int count = 0;
- struct cosa_data *cosa = cosa_;
-again:
- status = cosa_getstatus(cosa);
-#ifdef DEBUG_IRQS
- printk(KERN_INFO "cosa%d: got IRQ, status 0x%02x\n", cosa->num,
- status & 0xff);
-#endif
-#ifdef DEBUG_IO
- debug_status_in(cosa, status);
-#endif
- switch (status & SR_CMD_FROM_SRP_MASK) {
- case SR_DOWN_REQUEST:
- tx_interrupt(cosa, status);
- break;
- case SR_UP_REQUEST:
- rx_interrupt(cosa, status);
- break;
- case SR_END_OF_TRANSFER:
- eot_interrupt(cosa, status);
- break;
- default:
- /* We may be too fast for SRP. Try to wait a bit more. */
- if (count++ < 100) {
- udelay(100);
- goto again;
- }
- printk(KERN_INFO "cosa%d: unknown status 0x%02x in IRQ after %d retries\n",
- cosa->num, status & 0xff, count);
- }
-#ifdef DEBUG_IRQS
- if (count)
- printk(KERN_INFO "%s: %d-times got unknown status in IRQ\n",
- cosa->name, count);
- else
- printk(KERN_INFO "%s: returning from IRQ\n", cosa->name);
-#endif
-}
-
-
-/* ---------- I/O debugging routines ---------- */
-/*
- * These routines can be used to monitor COSA/SRP I/O and to printk()
- * the data being transfered on the data and status I/O port in a
- * readable way.
- */
-
-#ifdef DEBUG_IO
-static void debug_status_in(struct cosa_data *cosa, int status)
-{
- char *s;
- switch(status & SR_CMD_FROM_SRP_MASK) {
- case SR_UP_REQUEST:
- s = "RX_REQ";
- break;
- case SR_DOWN_REQUEST:
- s = "TX_REQ";
- break;
- case SR_END_OF_TRANSFER:
- s = "ET_REQ";
- break;
- default:
- s = "NO_REQ";
- break;
- }
- printk(KERN_INFO "%s: IO: status -> 0x%02x (%s%s%s%s)\n",
- cosa->name,
- status,
- status & SR_USR_RQ ? "USR_RQ|":"",
- status & SR_TX_RDY ? "TX_RDY|":"",
- status & SR_RX_RDY ? "RX_RDY|":"",
- s);
-}
-
-static void debug_status_out(struct cosa_data *cosa, int status)
-{
- printk(KERN_INFO "%s: IO: status <- 0x%02x (%s%s%s%s%s%s)\n",
- cosa->name,
- status,
- status & SR_RX_DMA_ENA ? "RXDMA|":"!rxdma|",
- status & SR_TX_DMA_ENA ? "TXDMA|":"!txdma|",
- status & SR_RST ? "RESET|":"",
- status & SR_USR_INT_ENA ? "USRINT|":"!usrint|",
- status & SR_TX_INT_ENA ? "TXINT|":"!txint|",
- status & SR_RX_INT_ENA ? "RXINT":"!rxint");
-}
-
-static void debug_data_in(struct cosa_data *cosa, int data)
-{
- printk(KERN_INFO "%s: IO: data -> 0x%04x\n", cosa->name, data);
-}
-
-static void debug_data_out(struct cosa_data *cosa, int data)
-{
- printk(KERN_INFO "%s: IO: data <- 0x%04x\n", cosa->name, data);
-}
-
-static void debug_data_cmd(struct cosa_data *cosa, int data)
-{
- printk(KERN_INFO "%s: IO: data <- 0x%04x (%s|%s)\n",
- cosa->name, data,
- data & SR_RDY_RCV ? "RX_RDY" : "!rx_rdy",
- data & SR_RDY_SND ? "TX_RDY" : "!tx_rdy");
-}
-#endif
-
-/* EOF -- this file has not been truncated */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)