[PATCH net-next 4/6] net: wan: remove support for COSA and SRP synchronous serial boards

[Jakub Kicinski <kuba@kernel.org>]

Looks like all the changes to this driver had been automated
churn since git era begun. The driver is using virt_to_bus()
so it should be updated to a proper DMA API or removed. Given
the latest "news" entry on the website is from 1999 I'm opting
for the latter.

I'm marking the allocated char device major number as [REMOVED],
I reckon we can't reuse it in case some SW out there assumes its
COSA?

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: corbet@lwn.net
CC: linux-doc@vger.kernel.org
CC: alexandre.ghiti@canonical.com
CC: linus.walleij@linaro.org
CC: juerg.haefliger@canonical.com
CC: kilobyte@angband.pl
CC: huangguangbin2@huawei.com
CC: lipeng321@huawei.com
CC: arnd@arndb.de
CC: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
---
 Documentation/admin-guide/devices.txt |    2 +-
 MAINTAINERS                           |    6 -
 drivers/net/wan/Kconfig               |   22 -
 drivers/net/wan/Makefile              |    1 -
 drivers/net/wan/cosa.c                | 2052 -------------------------
 drivers/net/wan/cosa.h                |  104 --
 6 files changed, 1 insertion(+), 2186 deletions(-)
 delete mode 100644 drivers/net/wan/cosa.c
 delete mode 100644 drivers/net/wan/cosa.h

diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index c07dc0ee860e..9764d6edb189 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -1933,7 +1933,7 @@
 		    ...
 		255= /dev/umem/d15p15  15th partition of 16th board.
 
- 117 char	COSA/SRP synchronous serial card
+ 117 char	[REMOVED] COSA/SRP synchronous serial card
 		  0 = /dev/cosa0c0	1st board, 1st channel
 		  1 = /dev/cosa0c1	1st board, 2nd channel
 		    ...
diff --git a/MAINTAINERS b/MAINTAINERS
index dd61684c2573..9619058bb0b9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5047,12 +5047,6 @@ S:	Maintained
 F:	Documentation/hwmon/corsair-psu.rst
 F:	drivers/hwmon/corsair-psu.c
 
-COSA/SRP SYNC SERIAL DRIVER
-M:	Jan "Yenya" Kasprzak <kas@fi.muni.cz>
-S:	Maintained
-W:	http://www.fi.muni.cz/~kas/cosa/
-F:	drivers/net/wan/cosa*
-
 COUNTER SUBSYSTEM
 M:	William Breathitt Gray <vilhelm.gray@gmail.com>
 L:	linux-iio@vger.kernel.org
diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 588b2333cdb8..12c5b6c67ab2 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -35,28 +35,6 @@ config HOSTESS_SV11
 	  The driver will be compiled as a module: the
 	  module will be called hostess_sv11.
 
-# The COSA/SRP driver has not been tested as non-modular yet.
-config COSA
-	tristate "COSA/SRP sync serial boards support"
-	depends on ISA && m && ISA_DMA_API && HDLC && VIRT_TO_BUS
-	help
-	  Driver for COSA and SRP synchronous serial boards.
-
-	  These boards allow to connect synchronous serial devices (for example
-	  base-band modems, or any other device with the X.21, V.24, V.35 or
-	  V.36 interface) to your Linux box. The cards can work as the
-	  character device, synchronous PPP network device, or the Cisco HDLC
-	  network device.
-
-	  You will need user-space utilities COSA or SRP boards for downloading
-	  the firmware to the cards and to set them up. Look at the
-	  <http://www.fi.muni.cz/~kas/cosa/> for more information. You can also
-	  read the comment at the top of the <file:drivers/net/wan/cosa.c> for
-	  details about the cards and the driver itself.
-
-	  The driver will be compiled as a module: the
-	  module will be called cosa.
-
 # There is no way to detect a Sealevel board. Force it modular
 config SEALEVEL_4021
 	tristate "Sealevel Systems 4021 support"
diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile
index 1cd42147b34f..901a094c061c 100644
--- a/drivers/net/wan/Makefile
+++ b/drivers/net/wan/Makefile
@@ -16,7 +16,6 @@ obj-$(CONFIG_HDLC_X25)		+= hdlc_x25.o
 
 obj-$(CONFIG_HOSTESS_SV11)	+= z85230.o	hostess_sv11.o
 obj-$(CONFIG_SEALEVEL_4021)	+= z85230.o	sealevel.o
-obj-$(CONFIG_COSA)		+= cosa.o
 obj-$(CONFIG_FARSYNC)		+= farsync.o
 
 obj-$(CONFIG_LAPBETHER)		+= lapbether.o
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
deleted file mode 100644
index 23d2954d9747..000000000000
--- a/drivers/net/wan/cosa.c
+++ /dev/null
@@ -1,2052 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* $Id: cosa.c,v 1.31 2000/03/08 17:47:16 kas Exp $ */
-
-/*  Copyright (C) 1995-1997  Jan "Yenya" Kasprzak <kas@fi.muni.cz>
- *  Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
- */
-
-/* The driver for the SRP and COSA synchronous serial cards.
- *
- * HARDWARE INFO
- *
- * Both cards are developed at the Institute of Computer Science,
- * Masaryk University (https://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 https://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 two modes (character or network device).
- *
- * 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
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/slab.h>
-#include <linux/poll.h>
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/hdlc.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/netdevice.h>
-#include <linux/spinlock.h>
-#include <linux/mutex.h>
-#include <linux/device.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/byteorder.h>
-
-#undef COSA_SLOW_IO	/* for testing purposes only */
-
-#include "cosa.h"
-
-/* 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 mutex rlock;
-	struct semaphore wsem;
-	char *rxdata;
-	int rxsize;
-	wait_queue_head_t txwaitq, rxwaitq;
-	int tx_status, rx_status;
-
-	/* generic HDLC device parts */
-	struct net_device *netdev;
-	struct sk_buff *rx_skb, *tx_skb;
-};
-
-/* cosa->firmware_status bits */
-#define COSA_FW_RESET		BIT(0)	/* Is the ROM monitor active? */
-#define COSA_FW_DOWNLOAD	BIT(1)	/* Is the microcode downloaded? */
-#define COSA_FW_START		BIT(2)	/* Is the microcode running? */
-
-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 firmware */
-	int firmware_status;		/* Downloaded, reseted, etc. */
-	unsigned long rxbitmap, txbitmap;/* Bitmap of channels who are willing to send/receive data */
-	unsigned long 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 DEFINE_MUTEX(cosa_chardev_mutex);
-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 */
-
-#define TX_TIMEOUT	(5 * HZ)
-
-/* Maybe the following should be allocated dynamically */
-static struct cosa_data cosa_cards[MAX_CARDS];
-static int nr_cards;
-
-#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
-static int io[MAX_CARDS + 1];
-static int dma[MAX_CARDS + 1];
-#endif
-/* IRQ can be safely autoprobed */
-static int irq[MAX_CARDS + 1] = {-1, -1, -1, -1, -1, -1, 0,};
-
-/* for class stuff*/
-static struct class *cosa_class;
-
-#ifdef MODULE
-module_param_hw_array(io, int, ioport, NULL, 0);
-MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards");
-module_param_hw_array(irq, int, irq, NULL, 0);
-MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards");
-module_param_hw_array(dma, int, dma, NULL, 0);
-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");
-MODULE_LICENSE("GPL");
-#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);
-
-/* Network device stuff */
-static int cosa_net_attach(struct net_device *dev, unsigned short encoding,
-			   unsigned short parity);
-static int cosa_net_open(struct net_device *d);
-static int cosa_net_close(struct net_device *d);
-static void cosa_net_timeout(struct net_device *d, unsigned int txqueue);
-static netdev_tx_t cosa_net_tx(struct sk_buff *skb, struct net_device *d);
-static char *cosa_net_setup_rx(struct channel_data *channel, int size);
-static int cosa_net_rx_done(struct channel_data *channel);
-static int cosa_net_tx_done(struct channel_data *channel, int size);
-
-/* Character device */
-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 ssize_t cosa_read(struct file *file,
-			 char __user *buf, size_t count, loff_t *ppos);
-static ssize_t cosa_write(struct file *file,
-			  const char __user *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 long cosa_chardev_ioctl(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 const struct file_operations cosa_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.read		= cosa_read,
-	.write		= cosa_write,
-	.poll		= cosa_poll,
-	.unlocked_ioctl	= cosa_chardev_ioctl,
-	.open		= cosa_open,
-	.release	= cosa_release,
-#ifdef COSA_FASYNC_WORKING
-	.fasync		= cosa_fasync,
-#endif
-};
-
-/* 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, void __user *a);
-static int cosa_readmem(struct cosa_data *cosa, void __user *a);
-
-/* COSA/SRP ROM monitor */
-static int download(struct cosa_data *cosa, const char __user *data, int addr, int len);
-static int startmicrocode(struct cosa_data *cosa, int address);
-static int readmem(struct cosa_data *cosa, char __user *data, int addr, int len);
-static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id);
-
-/* Auxiliary 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 irqreturn_t cosa_interrupt(int irq, void *cosa);
-
-/* 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
-
-static inline struct channel_data *dev_to_chan(struct net_device *dev)
-{
-	return (struct channel_data *)dev_to_hdlc(dev)->priv;
-}
-
-/* ---------- Initialization stuff ---------- */
-
-static int __init cosa_init(void)
-{
-	int i, err = 0;
-
-	if (cosa_major > 0) {
-		if (register_chrdev(cosa_major, "cosa", &cosa_fops)) {
-			pr_warn("unable to get major %d\n", cosa_major);
-			err = -EIO;
-			goto out;
-		}
-	} else {
-		cosa_major = register_chrdev(0, "cosa", &cosa_fops);
-		if (!cosa_major) {
-			pr_warn("unable to register chardev\n");
-			err = -EIO;
-			goto out;
-		}
-	}
-	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) {
-		pr_warn("no devices found\n");
-		unregister_chrdev(cosa_major, "cosa");
-		err = -ENODEV;
-		goto out;
-	}
-	cosa_class = class_create(THIS_MODULE, "cosa");
-	if (IS_ERR(cosa_class)) {
-		err = PTR_ERR(cosa_class);
-		goto out_chrdev;
-	}
-	for (i = 0; i < nr_cards; i++)
-		device_create(cosa_class, NULL, MKDEV(cosa_major, i), NULL,
-			      "cosa%d", i);
-	err = 0;
-	goto out;
-
-out_chrdev:
-	unregister_chrdev(cosa_major, "cosa");
-out:
-	return err;
-}
-module_init(cosa_init);
-
-static void __exit cosa_exit(void)
-{
-	struct cosa_data *cosa;
-	int i;
-
-	for (i = 0; i < nr_cards; i++)
-		device_destroy(cosa_class, MKDEV(cosa_major, i));
-	class_destroy(cosa_class);
-
-	for (cosa = cosa_cards; nr_cards--; cosa++) {
-		/* Clean up the per-channel data */
-		for (i = 0; i < cosa->nchannels; i++) {
-			/* Chardev driver has no alloc'd per-channel data */
-			unregister_hdlc_device(cosa->chan[i].netdev);
-			free_netdev(cosa->chan[i].netdev);
-		}
-		/* 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");
-}
-module_exit(cosa_exit);
-
-static const struct net_device_ops cosa_ops = {
-	.ndo_open       = cosa_net_open,
-	.ndo_stop       = cosa_net_close,
-	.ndo_start_xmit = hdlc_start_xmit,
-	.ndo_siocwandev = hdlc_ioctl,
-	.ndo_tx_timeout = cosa_net_timeout,
-};
-
-static int cosa_probe(int base, int irq, int dma)
-{
-	struct cosa_data *cosa = cosa_cards + nr_cards;
-	int i, err = 0;
-
-	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)) {
-		pr_info("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) {
-		pr_info("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) {
-		pr_info("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)) {
-		pr_info("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 (!request_region(base, is_8bit(cosa) ? 2 : 4, "cosa"))
-		return -1;
-
-	if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) {
-		printk(KERN_DEBUG "probe at 0x%x failed.\n", base);
-		err = -1;
-		goto err_out;
-	}
-
-	/* 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
-		pr_info("valid signature not found at 0x%x\n", base);
-#endif
-		err = -1;
-		goto err_out;
-	}
-	/* Update the name of the region now we know the type of card */
-	release_region(base, is_8bit(cosa) ? 2 : 4);
-	if (!request_region(base, is_8bit(cosa) ? 2 : 4, cosa->type)) {
-		printk(KERN_DEBUG "changing name at 0x%x failed.\n", base);
-		return -1;
-	}
-
-	/* Now do IRQ autoprobe */
-	if (irq < 0) {
-		unsigned long irqs;
-/*		pr_info("IRQ autoprobe\n"); */
-		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.
-		 */
-		set_current_state(TASK_INTERRUPTIBLE);
-		cosa_putstatus(cosa, SR_TX_INT_ENA);
-		schedule_timeout(msecs_to_jiffies(300));
-		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) {
-			pr_info("multiple interrupts obtained (%d, board at 0x%x)\n",
-				irq, cosa->datareg);
-			err = -1;
-			goto err_out;
-		}
-		if (irq == 0) {
-			pr_info("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? */
-
-	if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa)) {
-		err = -1;
-		goto err_out;
-	}
-	if (request_dma(cosa->dma, cosa->type)) {
-		err = -1;
-		goto err_out1;
-	}
-
-	cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL | GFP_DMA);
-	if (!cosa->bouncebuf) {
-		err = -ENOMEM;
-		goto err_out2;
-	}
-	sprintf(cosa->name, "cosa%d", cosa->num);
-
-	/* Initialize the per-channel data */
-	cosa->chan = kcalloc(cosa->nchannels, sizeof(struct channel_data), GFP_KERNEL);
-	if (!cosa->chan) {
-		err = -ENOMEM;
-		goto err_out3;
-	}
-
-	for (i = 0; i < cosa->nchannels; i++) {
-		struct channel_data *chan = &cosa->chan[i];
-
-		chan->cosa = cosa;
-		chan->num = i;
-		sprintf(chan->name, "cosa%dc%d", chan->cosa->num, i);
-
-		/* Initialize the chardev data structures */
-		mutex_init(&chan->rlock);
-		sema_init(&chan->wsem, 1);
-
-		/* Register the network interface */
-		chan->netdev = alloc_hdlcdev(chan);
-		if (!chan->netdev) {
-			pr_warn("%s: alloc_hdlcdev failed\n", chan->name);
-			err = -ENOMEM;
-			goto err_hdlcdev;
-		}
-		dev_to_hdlc(chan->netdev)->attach = cosa_net_attach;
-		dev_to_hdlc(chan->netdev)->xmit = cosa_net_tx;
-		chan->netdev->netdev_ops = &cosa_ops;
-		chan->netdev->watchdog_timeo = TX_TIMEOUT;
-		chan->netdev->base_addr = chan->cosa->datareg;
-		chan->netdev->irq = chan->cosa->irq;
-		chan->netdev->dma = chan->cosa->dma;
-		err = register_hdlc_device(chan->netdev);
-		if (err) {
-			netdev_warn(chan->netdev,
-				    "register_hdlc_device() failed\n");
-			free_netdev(chan->netdev);
-			goto err_hdlcdev;
-		}
-	}
-
-	pr_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++;
-
-err_hdlcdev:
-	while (i-- > 0) {
-		unregister_hdlc_device(cosa->chan[i].netdev);
-		free_netdev(cosa->chan[i].netdev);
-	}
-	kfree(cosa->chan);
-err_out3:
-	kfree(cosa->bouncebuf);
-err_out2:
-	free_dma(cosa->dma);
-err_out1:
-	free_irq(cosa->irq, cosa);
-err_out:
-	release_region(cosa->datareg, is_8bit(cosa) ? 2 : 4);
-	pr_notice("cosa%d: allocating resources failed\n", cosa->num);
-	return err;
-}
-
-/*---------- network device ---------- */
-
-static int cosa_net_attach(struct net_device *dev, unsigned short encoding,
-			   unsigned short parity)
-{
-	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
-		return 0;
-	return -EINVAL;
-}
-
-static int cosa_net_open(struct net_device *dev)
-{
-	struct channel_data *chan = dev_to_chan(dev);
-	int err;
-	unsigned long flags;
-
-	if (!(chan->cosa->firmware_status & COSA_FW_START)) {
-		pr_notice("%s: start the firmware first (status %d)\n",
-			  chan->cosa->name, chan->cosa->firmware_status);
-		return -EPERM;
-	}
-	spin_lock_irqsave(&chan->cosa->lock, flags);
-	if (chan->usage != 0) {
-		pr_warn("%s: cosa_net_open called with usage count %d\n",
-			chan->name, chan->usage);
-		spin_unlock_irqrestore(&chan->cosa->lock, flags);
-		return -EBUSY;
-	}
-	chan->setup_rx = cosa_net_setup_rx;
-	chan->tx_done = cosa_net_tx_done;
-	chan->rx_done = cosa_net_rx_done;
-	chan->usage = -1;
-	chan->cosa->usage++;
-	spin_unlock_irqrestore(&chan->cosa->lock, flags);
-
-	err = hdlc_open(dev);
-	if (err) {
-		spin_lock_irqsave(&chan->cosa->lock, flags);
-		chan->usage = 0;
-		chan->cosa->usage--;
-		spin_unlock_irqrestore(&chan->cosa->lock, flags);
-		return err;
-	}
-
-	netif_start_queue(dev);
-	cosa_enable_rx(chan);
-	return 0;
-}
-
-static netdev_tx_t cosa_net_tx(struct sk_buff *skb,
-			       struct net_device *dev)
-{
-	struct channel_data *chan = dev_to_chan(dev);
-
-	netif_stop_queue(dev);
-
-	chan->tx_skb = skb;
-	cosa_start_tx(chan, skb->data, skb->len);
-	return NETDEV_TX_OK;
-}
-
-static void cosa_net_timeout(struct net_device *dev, unsigned int txqueue)
-{
-	struct channel_data *chan = dev_to_chan(dev);
-
-	if (test_bit(RXBIT, &chan->cosa->rxtx)) {
-		chan->netdev->stats.rx_errors++;
-		chan->netdev->stats.rx_missed_errors++;
-	} else {
-		chan->netdev->stats.tx_errors++;
-		chan->netdev->stats.tx_aborted_errors++;
-	}
-	cosa_kick(chan->cosa);
-	if (chan->tx_skb) {
-		dev_kfree_skb(chan->tx_skb);
-		chan->tx_skb = NULL;
-	}
-	netif_wake_queue(dev);
-}
-
-static int cosa_net_close(struct net_device *dev)
-{
-	struct channel_data *chan = dev_to_chan(dev);
-	unsigned long flags;
-
-	netif_stop_queue(dev);
-	hdlc_close(dev);
-	cosa_disable_rx(chan);
-	spin_lock_irqsave(&chan->cosa->lock, flags);
-	if (chan->rx_skb) {
-		kfree_skb(chan->rx_skb);
-		chan->rx_skb = NULL;
-	}
-	if (chan->tx_skb) {
-		kfree_skb(chan->tx_skb);
-		chan->tx_skb = NULL;
-	}
-	chan->usage = 0;
-	chan->cosa->usage--;
-	spin_unlock_irqrestore(&chan->cosa->lock, flags);
-	return 0;
-}
-
-static char *cosa_net_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.
-	 */
-	kfree_skb(chan->rx_skb);
-	chan->rx_skb = dev_alloc_skb(size);
-	if (!chan->rx_skb) {
-		pr_notice("%s: Memory squeeze, dropping packet\n", chan->name);
-		chan->netdev->stats.rx_dropped++;
-		return NULL;
-	}
-	netif_trans_update(chan->netdev);
-	return skb_put(chan->rx_skb, size);
-}
-
-static int cosa_net_rx_done(struct channel_data *chan)
-{
-	if (!chan->rx_skb) {
-		pr_warn("%s: rx_done with empty skb!\n", chan->name);
-		chan->netdev->stats.rx_errors++;
-		chan->netdev->stats.rx_frame_errors++;
-		return 0;
-	}
-	chan->rx_skb->protocol = hdlc_type_trans(chan->rx_skb, chan->netdev);
-	chan->rx_skb->dev = chan->netdev;
-	skb_reset_mac_header(chan->rx_skb);
-	chan->netdev->stats.rx_packets++;
-	chan->netdev->stats.rx_bytes += chan->cosa->rxsize;
-	netif_rx(chan->rx_skb);
-	chan->rx_skb = NULL;
-	return 0;
-}
-
-/* ARGSUSED */
-static int cosa_net_tx_done(struct channel_data *chan, int size)
-{
-	if (!chan->tx_skb) {
-		pr_warn("%s: tx_done with empty skb!\n", chan->name);
-		chan->netdev->stats.tx_errors++;
-		chan->netdev->stats.tx_aborted_errors++;
-		return 1;
-	}
-	dev_consume_skb_irq(chan->tx_skb);
-	chan->tx_skb = NULL;
-	chan->netdev->stats.tx_packets++;
-	chan->netdev->stats.tx_bytes += size;
-	netif_wake_queue(chan->netdev);
-	return 1;
-}
-
-/*---------- Character device ---------- */
-
-static ssize_t cosa_read(struct file *file,
-			 char __user *buf, size_t count, loff_t *ppos)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	unsigned long flags;
-	struct channel_data *chan = file->private_data;
-	struct cosa_data *cosa = chan->cosa;
-	char *kbuf;
-
-	if (!(cosa->firmware_status & COSA_FW_START)) {
-		pr_notice("%s: start the firmware first (status %d)\n",
-			  cosa->name, cosa->firmware_status);
-		return -EPERM;
-	}
-	if (mutex_lock_interruptible(&chan->rlock))
-		return -ERESTARTSYS;
-
-	chan->rxdata = kmalloc(COSA_MTU, GFP_DMA | GFP_KERNEL);
-	if (!chan->rxdata) {
-		mutex_unlock(&chan->rlock);
-		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) {
-		set_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);
-			__set_current_state(TASK_RUNNING);
-			spin_unlock_irqrestore(&cosa->lock, flags);
-			mutex_unlock(&chan->rlock);
-			return -ERESTARTSYS;
-		}
-	}
-	remove_wait_queue(&chan->rxwaitq, &wait);
-	__set_current_state(TASK_RUNNING);
-	kbuf = chan->rxdata;
-	count = chan->rxsize;
-	spin_unlock_irqrestore(&cosa->lock, flags);
-	mutex_unlock(&chan->rlock);
-
-	if (copy_to_user(buf, kbuf, count)) {
-		kfree(kbuf);
-		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 __user *buf, size_t count, loff_t *ppos)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	struct channel_data *chan = file->private_data;
-	struct cosa_data *cosa = chan->cosa;
-	unsigned long flags;
-	char *kbuf;
-
-	if (!(cosa->firmware_status & COSA_FW_START)) {
-		pr_notice("%s: start the firmware first (status %d)\n",
-			  cosa->name, cosa->firmware_status);
-		return -EPERM;
-	}
-	if (down_interruptible(&chan->wsem))
-		return -ERESTARTSYS;
-
-	if (count > COSA_MTU)
-		count = COSA_MTU;
-
-	/* Allocate the buffer */
-	kbuf = kmalloc(count, GFP_KERNEL | GFP_DMA);
-	if (!kbuf) {
-		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) {
-		set_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);
-			__set_current_state(TASK_RUNNING);
-			chan->tx_status = 1;
-			spin_unlock_irqrestore(&cosa->lock, flags);
-			up(&chan->wsem);
-			kfree(kbuf);
-			return -ERESTARTSYS;
-		}
-	}
-	remove_wait_queue(&chan->txwaitq, &wait);
-	__set_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 __poll_t cosa_poll(struct file *file, poll_table *poll)
-{
-	pr_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;
-	int ret = 0;
-
-	mutex_lock(&cosa_chardev_mutex);
-	n = iminor(file_inode(file)) >> CARD_MINOR_BITS;
-	if (n >= nr_cards) {
-		ret = -ENODEV;
-		goto out;
-	}
-	cosa = cosa_cards + n;
-
-	n = iminor(file_inode(file)) & ((1 << CARD_MINOR_BITS) - 1);
-	if (n >= cosa->nchannels) {
-		ret = -ENODEV;
-		goto out;
-	}
-	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);
-		ret = -EBUSY;
-		goto out;
-	}
-	cosa->usage++;
-	chan->usage++;
-
-	chan->tx_done = chrdev_tx_done;
-	chan->setup_rx = chrdev_setup_rx;
-	chan->rx_done = chrdev_rx_done;
-	spin_unlock_irqrestore(&cosa->lock, flags);
-out:
-	mutex_unlock(&cosa_chardev_mutex);
-	return ret;
-}
-
-static int cosa_release(struct inode *inode, struct file *file)
-{
-	struct channel_data *channel = file->private_data;
-	struct cosa_data *cosa;
-	unsigned long flags;
-
-	cosa = channel->cosa;
-	spin_lock_irqsave(&cosa->lock, flags);
-	cosa->usage--;
-	channel->usage--;
-	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 = iminor(inode);
-
-	return fasync_helper(inode, file, on, &fasync[port]);
-}
-#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)
-		pr_info("cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n",
-			cosa->num, cosa->usage);
-	cosa->firmware_status &= ~(COSA_FW_RESET | COSA_FW_START);
-	if (cosa_reset_and_read_id(cosa, idstring) < 0) {
-		pr_notice("cosa%d: reset failed\n", cosa->num);
-		return -EIO;
-	}
-	pr_info("cosa%d: resetting device: %s\n", cosa->num, idstring);
-	cosa->firmware_status |= COSA_FW_RESET;
-	return 0;
-}
-
-/* High-level function to download data into COSA memory. Calls download() */
-static inline int cosa_download(struct cosa_data *cosa, void __user *arg)
-{
-	struct cosa_download d;
-	int i;
-
-	if (cosa->usage > 1)
-		pr_info("%s: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n",
-			cosa->name, cosa->usage);
-	if (!(cosa->firmware_status & COSA_FW_RESET)) {
-		pr_notice("%s: reset the card first (status %d)\n",
-			  cosa->name, cosa->firmware_status);
-		return -EPERM;
-	}
-
-	if (copy_from_user(&d, arg, sizeof(d)))
-		return -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 something fails, force the user to reset the card */
-	cosa->firmware_status &= ~(COSA_FW_RESET | COSA_FW_DOWNLOAD);
-
-	i = download(cosa, d.code, d.len, d.addr);
-	if (i < 0) {
-		pr_notice("cosa%d: microcode download failed: %d\n",
-			  cosa->num, i);
-		return -EIO;
-	}
-	pr_info("cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n",
-		cosa->num, d.len, d.addr);
-	cosa->firmware_status |= COSA_FW_RESET | COSA_FW_DOWNLOAD;
-	return 0;
-}
-
-/* High-level function to read COSA memory. Calls readmem() */
-static inline int cosa_readmem(struct cosa_data *cosa, void __user *arg)
-{
-	struct cosa_download d;
-	int i;
-
-	if (cosa->usage > 1)
-		pr_info("cosa%d: WARNING: readmem requested with cosa->usage > 1 (%d). Odd things may happen.\n",
-			cosa->num, cosa->usage);
-	if (!(cosa->firmware_status & COSA_FW_RESET)) {
-		pr_notice("%s: reset the card first (status %d)\n",
-			  cosa->name, cosa->firmware_status);
-		return -EPERM;
-	}
-
-	if (copy_from_user(&d, arg, sizeof(d)))
-		return -EFAULT;
-
-	/* If something fails, force the user to reset the card */
-	cosa->firmware_status &= ~COSA_FW_RESET;
-
-	i = readmem(cosa, d.code, d.len, d.addr);
-	if (i < 0) {
-		pr_notice("cosa%d: reading memory failed: %d\n", cosa->num, i);
-		return -EIO;
-	}
-	pr_info("cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n",
-		cosa->num, d.len, d.addr);
-	cosa->firmware_status |= COSA_FW_RESET;
-	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)
-		pr_info("cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n",
-			cosa->num, cosa->usage);
-
-	if ((cosa->firmware_status & (COSA_FW_RESET | COSA_FW_DOWNLOAD))
-		!= (COSA_FW_RESET | COSA_FW_DOWNLOAD)) {
-		pr_notice("%s: download the microcode and/or reset the card first (status %d)\n",
-			  cosa->name, cosa->firmware_status);
-		return -EPERM;
-	}
-	cosa->firmware_status &= ~COSA_FW_RESET;
-	i = startmicrocode(cosa, address);
-	if (i < 0) {
-		pr_notice("cosa%d: start microcode at 0x%04x failed: %d\n",
-			  cosa->num, address, i);
-		return -EIO;
-	}
-	pr_info("cosa%d: starting microcode at 0x%04x\n", cosa->num, address);
-	cosa->startaddr = address;
-	cosa->firmware_status |= COSA_FW_START;
-	return 0;
-}
-
-/* Buffer of size at least COSA_MAX_ID_STRING is expected */
-static inline int cosa_getidstr(struct cosa_data *cosa, char __user *string)
-{
-	int l = strlen(cosa->id_string) + 1;
-
-	if (copy_to_user(string, cosa->id_string, l))
-		return -EFAULT;
-	return l;
-}
-
-/* Buffer of size at least COSA_MAX_ID_STRING is expected */
-static inline int cosa_gettype(struct cosa_data *cosa, char __user *string)
-{
-	int l = strlen(cosa->type) + 1;
-
-	if (copy_to_user(string, cosa->type, l))
-		return -EFAULT;
-	return l;
-}
-
-static int cosa_ioctl_common(struct cosa_data *cosa,
-			     struct channel_data *channel, unsigned int cmd,
-			     unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-
-	switch (cmd) {
-	case COSAIORSET:	/* Reset the device */
-		if (!capable(CAP_NET_ADMIN))
-			return -EACCES;
-		return cosa_reset(cosa);
-	case COSAIOSTRT:	/* Start the firmware */
-		if (!capable(CAP_SYS_RAWIO))
-			return -EACCES;
-		return cosa_start(cosa, arg);
-	case COSAIODOWNLD:	/* Download the firmware */
-		if (!capable(CAP_SYS_RAWIO))
-			return -EACCES;
-
-		return cosa_download(cosa, argp);
-	case COSAIORMEM:
-		if (!capable(CAP_SYS_RAWIO))
-			return -EACCES;
-		return cosa_readmem(cosa, argp);
-	case COSAIORTYPE:
-		return cosa_gettype(cosa, argp);
-	case COSAIORIDSTR:
-		return cosa_getidstr(cosa, argp);
-	case COSAIONRCARDS:
-		return nr_cards;
-	case COSAIONRCHANS:
-		return cosa->nchannels;
-	case COSAIOBMSET:
-		if (!capable(CAP_SYS_RAWIO))
-			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 long cosa_chardev_ioctl(struct file *file, unsigned int cmd,
-			       unsigned long arg)
-{
-	struct channel_data *channel = file->private_data;
-	struct cosa_data *cosa;
-	long ret;
-
-	mutex_lock(&cosa_chardev_mutex);
-	cosa = channel->cosa;
-	ret = cosa_ioctl_common(cosa, channel, cmd, arg);
-	mutex_unlock(&cosa_chardev_mutex);
-	return ret;
-}
-
-/*---------- 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;
-	unsigned long flags;
-#ifdef DEBUG_DATA
-	int i;
-
-	pr_info("cosa%dc%d: starting tx(0x%x)",
-		chan->cosa->num, chan->num, len);
-	for (i = 0; i < len; i++)
-		pr_cont(" %02x", buf[i]&0xff);
-	pr_cont("\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 long flags;
-	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 long flags, flags1;
-	char *s = "(probably) IRQ";
-
-	if (test_bit(RXBIT, &cosa->rxtx))
-		s = "RX DMA";
-	if (test_bit(TXBIT, &cosa->rxtx))
-		s = "TX DMA";
-
-	pr_info("%s: %s 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;
-	unsigned long b = (unsigned long)buf;
-
-	if (b + len >= MAX_DMA_ADDRESS)
-		return 0;
-	if ((b ^ (b + len)) & 0x10000) {
-		if (count++ < 5)
-			pr_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, const char __user *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
-		if (get_user(c, microcode))
-			return -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 __user *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;
-
-		i = get_wait_data(cosa);
-		if (i == -1) {
-			pr_info("0x%04x bytes remaining\n", length);
-			return -11;
-		}
-		c = i;
-#if 1
-		if (put_user(c, microcode))
-			return -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);
-	msleep(500);
-	/* 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) {
-		curr = get_wait_data(cosa);
-		if (curr == -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
-			pr_info("get_wait_data returning after %d retries\n",
-				999 - retries);
-#endif
-			return r;
-		}
-		/* sleep if not ready to read */
-		schedule_timeout_interruptible(1);
-	}
-	pr_info("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
-			pr_info("Putdata: %d retries\n", 999 - retries);
-#endif
-			return 0;
-		}
-#if 0
-		/* sleep if not ready to read */
-		schedule_timeout_interruptible(1);
-#endif
-	}
-	pr_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) {
-			pr_notice("cosa%d: puthexnumber failed to write byte %d\n",
-				  cosa->num, i);
-			return -1 - 2 * i;
-		}
-		if (get_wait_data(cosa) != temp[i]) {
-			pr_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
-	pr_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) {
-			pr_warn("%s: No channel wants data in TX IRQ. Expect DMA timeout.\n",
-				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 */
-#ifdef DEBUG_IRQS
-				printk(KERN_DEBUG "%s: Forcing TX "
-					"to not-ready channel %d\n",
-					cosa->name, cosa->txchan);
-#endif
-				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;
-
-		pr_info("busmaster IRQ\n");
-		while (!(cosa_getstatus(cosa) & SR_TX_RDY)) {
-			count++;
-			udelay(10);
-			if (count > 1000)
-				break;
-		}
-		pr_info("status %x\n", cosa_getstatus(cosa));
-		pr_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);
-		}
-		pr_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
-	pr_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
-			pr_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
-		pr_info("cosa%d: receive rxsize = (0x%04x)\n",
-			cosa->num, cosa->rxsize);
-#endif
-	}
-	if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) {
-		pr_warn("%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 */
-		pr_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 inline void 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;
-
-		pr_info("cosa%dc%d: done rx(0x%x)",
-			cosa->num, cosa->rxchan->num, cosa->rxsize);
-		for (i = 0; i < cosa->rxsize; i++)
-			pr_cont(" %02x", cosa->rxbuf[i]&0xff);
-		pr_cont("\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 {
-		pr_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 irqreturn_t cosa_interrupt(int irq, void *cosa_)
-{
-	unsigned status;
-	int count = 0;
-	struct cosa_data *cosa = cosa_;
-again:
-	status = cosa_getstatus(cosa);
-#ifdef DEBUG_IRQS
-	pr_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;
-		}
-		pr_info("cosa%d: unknown status 0x%02x in IRQ after %d retries\n",
-			cosa->num, status & 0xff, count);
-	}
-#ifdef DEBUG_IRQS
-	if (count)
-		pr_info("%s: %d-times got unknown status in IRQ\n",
-			cosa->name, count);
-	else
-		pr_info("%s: returning from IRQ\n", cosa->name);
-#endif
-	return IRQ_HANDLED;
-}
-
-/* ---------- I/O debugging routines ---------- */
-/* These routines can be used to monitor COSA/SRP I/O and to printk()
- * the data being transferred 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;
-	}
-	pr_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)
-{
-	pr_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)
-{
-	pr_info("%s: IO: data -> 0x%04x\n", cosa->name, data);
-}
-
-static void debug_data_out(struct cosa_data *cosa, int data)
-{
-	pr_info("%s: IO: data <- 0x%04x\n", cosa->name, data);
-}
-
-static void debug_data_cmd(struct cosa_data *cosa, int data)
-{
-	pr_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 */
diff --git a/drivers/net/wan/cosa.h b/drivers/net/wan/cosa.h
deleted file mode 100644
index f57e0af9d56a..000000000000
--- a/drivers/net/wan/cosa.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* $Id: cosa.h,v 1.6 1999/01/06 14:02:44 kas Exp $ */
-
-/*
- *  Copyright (C) 1995-1997  Jan "Yenya" Kasprzak <kas@fi.muni.cz>
- */
-
-#ifndef COSA_H__
-#define COSA_H__
-
-#include <linux/ioctl.h>
-
-#ifdef __KERNEL__
-/* status register - output bits */
-#define SR_RX_DMA_ENA   0x04    /* receiver DMA enable bit */
-#define SR_TX_DMA_ENA   0x08    /* transmitter DMA enable bit */
-#define SR_RST          0x10    /* SRP reset */
-#define SR_USR_INT_ENA  0x20    /* user interrupt enable bit */
-#define SR_TX_INT_ENA   0x40    /* transmitter interrupt enable bit */
-#define SR_RX_INT_ENA   0x80    /* receiver interrupt enable bit */
-
-/* status register - input bits */
-#define SR_USR_RQ       0x20    /* user interrupt request pending */
-#define SR_TX_RDY       0x40    /* transmitter empty (ready) */
-#define SR_RX_RDY       0x80    /* receiver data ready */
-
-#define SR_UP_REQUEST   0x02    /* request from SRP to transfer data
-                                   up to PC */
-#define SR_DOWN_REQUEST 0x01    /* SRP is able to transfer data down
-                                   from PC to SRP */
-#define SR_END_OF_TRANSFER      0x03    /* SRP signalize end of
-                                           transfer (up or down) */
-
-#define SR_CMD_FROM_SRP_MASK    0x03    /* mask to get SRP command */
-
-/* bits in driver status byte definitions : */
-#define SR_RDY_RCV      0x01    /* ready to receive packet */
-#define SR_RDY_SND      0x02    /* ready to send packet */
-#define SR_CMD_PND      0x04    /* command pending */ /* not currently used */
-
-/* ???? */
-#define SR_PKT_UP       0x01    /* transfer of packet up in progress */
-#define SR_PKT_DOWN     0x02    /* transfer of packet down in progress */
-
-#endif /* __KERNEL__ */
-
-#define SR_LOAD_ADDR    0x4400  /* SRP microcode load address */
-#define SR_START_ADDR   0x4400  /* SRP microcode start address */
-
-#define COSA_LOAD_ADDR    0x400  /* SRP microcode load address */
-#define COSA_MAX_FIRMWARE_SIZE	0x10000
-
-/* ioctls */
-struct cosa_download {
-	int addr, len;
-	char __user *code;
-};
-
-/* Reset the device */
-#define COSAIORSET	_IO('C',0xf0)
-
-/* Start microcode at given address */
-#define COSAIOSTRT	_IOW('C',0xf1, int)
-
-/* Read the block from the device memory */
-#define COSAIORMEM	_IOWR('C',0xf2, struct cosa_download *)
-	/* actually the struct cosa_download itself; this is to keep
-	 * the ioctl number same as in 2.4 in order to keep the user-space
-	 * utils compatible. */
-
-/* Write the block to the device memory (i.e. download the microcode) */
-#define COSAIODOWNLD	_IOW('C',0xf2, struct cosa_download *)
-	/* actually the struct cosa_download itself; this is to keep
-	 * the ioctl number same as in 2.4 in order to keep the user-space
-	 * utils compatible. */
-
-/* Read the device type (one of "srp", "cosa", and "cosa8" for now) */
-#define COSAIORTYPE	_IOR('C',0xf3, char *)
-
-/* Read the device identification string */
-#define COSAIORIDSTR	_IOR('C',0xf4, char *)
-/* Maximum length of the identification string. */
-#define COSA_MAX_ID_STRING 128
-
-/* Increment/decrement the module usage count :-) */
-/* #define COSAIOMINC	_IO('C',0xf5) */
-/* #define COSAIOMDEC	_IO('C',0xf6) */
-
-/* Get the total number of cards installed */
-#define COSAIONRCARDS	_IO('C',0xf7)
-
-/* Get the number of channels on this card */
-#define COSAIONRCHANS	_IO('C',0xf8)
-
-/* Set the driver for the bus-master operations */
-#define COSAIOBMSET	_IOW('C', 0xf9, unsigned short)
-
-#define COSA_BM_OFF	0	/* Bus-mastering off - use ISA DMA (default) */
-#define COSA_BM_ON	1	/* Bus-mastering on - faster but untested */
-
-/* Gets the busmaster status */
-#define COSAIOBMGET	_IO('C', 0xfa)
-
-#endif /* !COSA_H__ */
-- 
2.34.1