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Message-Id: <20220426175436.417283-5-kuba@kernel.org>
Date: Tue, 26 Apr 2022 10:54:34 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net, pabeni@...hat.com
Cc: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
corbet@....net, linux-doc@...r.kernel.org,
alexandre.ghiti@...onical.com, linus.walleij@...aro.org,
juerg.haefliger@...onical.com, kilobyte@...band.pl,
huangguangbin2@...wei.com, lipeng321@...wei.com, arnd@...db.de
Subject: [PATCH net-next 4/6] net: wan: remove support for COSA and SRP synchronous serial boards
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@...nel.org>
---
CC: corbet@....net
CC: linux-doc@...r.kernel.org
CC: alexandre.ghiti@...onical.com
CC: linus.walleij@...aro.org
CC: juerg.haefliger@...onical.com
CC: kilobyte@...band.pl
CC: huangguangbin2@...wei.com
CC: lipeng321@...wei.com
CC: arnd@...db.de
CC: Jan "Yenya" Kasprzak <kas@...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@...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@...il.com>
L: linux-iio@...r.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@...muni.cz>
- * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@...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@....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@...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@...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@...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
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