Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: cosa.c,v 1.31 2000/03/08 17:47:16 kas Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@fi.muni.cz> |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 5 | * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * The driver for the SRP and COSA synchronous serial cards. |
| 24 | * |
| 25 | * HARDWARE INFO |
| 26 | * |
| 27 | * Both cards are developed at the Institute of Computer Science, |
| 28 | * Masaryk University (http://www.ics.muni.cz/). The hardware is |
| 29 | * developed by Jiri Novotny <novotny@ics.muni.cz>. More information |
| 30 | * and the photo of both cards is available at |
| 31 | * http://www.pavoucek.cz/cosa.html. The card documentation, firmwares |
| 32 | * and other goods can be downloaded from ftp://ftp.ics.muni.cz/pub/cosa/. |
| 33 | * For Linux-specific utilities, see below in the "Software info" section. |
| 34 | * If you want to order the card, contact Jiri Novotny. |
| 35 | * |
| 36 | * The SRP (serial port?, the Czech word "srp" means "sickle") card |
| 37 | * is a 2-port intelligent (with its own 8-bit CPU) synchronous serial card |
| 38 | * with V.24 interfaces up to 80kb/s each. |
| 39 | * |
| 40 | * The COSA (communication serial adapter?, the Czech word "kosa" means |
| 41 | * "scythe") is a next-generation sync/async board with two interfaces |
| 42 | * - currently any of V.24, X.21, V.35 and V.36 can be selected. |
| 43 | * It has a 16-bit SAB80166 CPU and can do up to 10 Mb/s per channel. |
| 44 | * The 8-channels version is in development. |
| 45 | * |
| 46 | * Both types have downloadable firmware and communicate via ISA DMA. |
| 47 | * COSA can be also a bus-mastering device. |
| 48 | * |
| 49 | * SOFTWARE INFO |
| 50 | * |
| 51 | * The homepage of the Linux driver is at http://www.fi.muni.cz/~kas/cosa/. |
| 52 | * The CVS tree of Linux driver can be viewed there, as well as the |
| 53 | * firmware binaries and user-space utilities for downloading the firmware |
| 54 | * into the card and setting up the card. |
| 55 | * |
| 56 | * The Linux driver (unlike the present *BSD drivers :-) can work even |
| 57 | * for the COSA and SRP in one computer and allows each channel to work |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 58 | * in one of the two modes (character or network device). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | * |
| 60 | * AUTHOR |
| 61 | * |
| 62 | * The Linux driver was written by Jan "Yenya" Kasprzak <kas@fi.muni.cz>. |
| 63 | * |
| 64 | * You can mail me bugfixes and even success reports. I am especially |
| 65 | * interested in the SMP and/or muliti-channel success/failure reports |
| 66 | * (I wonder if I did the locking properly :-). |
| 67 | * |
| 68 | * THE AUTHOR USED THE FOLLOWING SOURCES WHEN PROGRAMMING THE DRIVER |
| 69 | * |
| 70 | * The COSA/SRP NetBSD driver by Zdenek Salvet and Ivos Cernohlavek |
| 71 | * The skeleton.c by Donald Becker |
| 72 | * The SDL Riscom/N2 driver by Mike Natale |
| 73 | * The Comtrol Hostess SV11 driver by Alan Cox |
| 74 | * The Sync PPP/Cisco HDLC layer (syncppp.c) ported to Linux by Alan Cox |
| 75 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 77 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #include <linux/module.h> |
| 80 | #include <linux/kernel.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 81 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #include <linux/slab.h> |
| 83 | #include <linux/poll.h> |
| 84 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #include <linux/interrupt.h> |
| 86 | #include <linux/delay.h> |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 87 | #include <linux/hdlc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | #include <linux/errno.h> |
| 89 | #include <linux/ioport.h> |
| 90 | #include <linux/netdevice.h> |
| 91 | #include <linux/spinlock.h> |
Matthias Kaehlcke | 6387c4b | 2008-03-05 18:53:01 -0800 | [diff] [blame] | 92 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | #include <linux/device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #include <asm/io.h> |
| 95 | #include <asm/dma.h> |
| 96 | #include <asm/byteorder.h> |
| 97 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 98 | #undef COSA_SLOW_IO /* for testing purposes only */ |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #include "cosa.h" |
| 101 | |
| 102 | /* Maximum length of the identification string. */ |
| 103 | #define COSA_MAX_ID_STRING 128 |
| 104 | |
| 105 | /* Maximum length of the channel name */ |
| 106 | #define COSA_MAX_NAME (sizeof("cosaXXXcXXX")+1) |
| 107 | |
| 108 | /* Per-channel data structure */ |
| 109 | |
| 110 | struct channel_data { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | int usage; /* Usage count; >0 for chrdev, -1 for netdev */ |
| 112 | int num; /* Number of the channel */ |
| 113 | struct cosa_data *cosa; /* Pointer to the per-card structure */ |
| 114 | int txsize; /* Size of transmitted data */ |
| 115 | char *txbuf; /* Transmit buffer */ |
| 116 | char name[COSA_MAX_NAME]; /* channel name */ |
| 117 | |
| 118 | /* The HW layer interface */ |
| 119 | /* routine called from the RX interrupt */ |
| 120 | char *(*setup_rx)(struct channel_data *channel, int size); |
| 121 | /* routine called when the RX is done (from the EOT interrupt) */ |
| 122 | int (*rx_done)(struct channel_data *channel); |
| 123 | /* routine called when the TX is done (from the EOT interrupt) */ |
| 124 | int (*tx_done)(struct channel_data *channel, int size); |
| 125 | |
| 126 | /* Character device parts */ |
Matthias Kaehlcke | 6387c4b | 2008-03-05 18:53:01 -0800 | [diff] [blame] | 127 | struct mutex rlock; |
| 128 | struct semaphore wsem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | char *rxdata; |
| 130 | int rxsize; |
| 131 | wait_queue_head_t txwaitq, rxwaitq; |
| 132 | int tx_status, rx_status; |
| 133 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 134 | /* generic HDLC device parts */ |
| 135 | struct net_device *netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | struct sk_buff *rx_skb, *tx_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | }; |
| 138 | |
| 139 | /* cosa->firmware_status bits */ |
| 140 | #define COSA_FW_RESET (1<<0) /* Is the ROM monitor active? */ |
| 141 | #define COSA_FW_DOWNLOAD (1<<1) /* Is the microcode downloaded? */ |
| 142 | #define COSA_FW_START (1<<2) /* Is the microcode running? */ |
| 143 | |
| 144 | struct cosa_data { |
| 145 | int num; /* Card number */ |
| 146 | char name[COSA_MAX_NAME]; /* Card name - e.g "cosa0" */ |
| 147 | unsigned int datareg, statusreg; /* I/O ports */ |
| 148 | unsigned short irq, dma; /* IRQ and DMA number */ |
| 149 | unsigned short startaddr; /* Firmware start address */ |
| 150 | unsigned short busmaster; /* Use busmastering? */ |
| 151 | int nchannels; /* # of channels on this card */ |
| 152 | int driver_status; /* For communicating with firmware */ |
| 153 | int firmware_status; /* Downloaded, reseted, etc. */ |
Al Viro | 64b3361 | 2007-10-14 19:35:20 +0100 | [diff] [blame] | 154 | unsigned long rxbitmap, txbitmap;/* Bitmap of channels who are willing to send/receive data */ |
| 155 | unsigned long rxtx; /* RX or TX in progress? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | int enabled; |
| 157 | int usage; /* usage count */ |
| 158 | int txchan, txsize, rxsize; |
| 159 | struct channel_data *rxchan; |
| 160 | char *bouncebuf; |
| 161 | char *txbuf, *rxbuf; |
| 162 | struct channel_data *chan; |
| 163 | spinlock_t lock; /* For exclusive operations on this structure */ |
| 164 | char id_string[COSA_MAX_ID_STRING]; /* ROM monitor ID string */ |
| 165 | char *type; /* card type */ |
| 166 | }; |
| 167 | |
| 168 | /* |
| 169 | * Define this if you want all the possible ports to be autoprobed. |
| 170 | * It is here but it probably is not a good idea to use this. |
| 171 | */ |
| 172 | /* #define COSA_ISA_AUTOPROBE 1 */ |
| 173 | |
| 174 | /* |
| 175 | * Character device major number. 117 was allocated for us. |
| 176 | * The value of 0 means to allocate a first free one. |
| 177 | */ |
Arnd Bergmann | 15fd0cd | 2010-07-11 11:18:57 +0000 | [diff] [blame] | 178 | static DEFINE_MUTEX(cosa_chardev_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | static int cosa_major = 117; |
| 180 | |
| 181 | /* |
| 182 | * Encoding of the minor numbers: |
| 183 | * The lowest CARD_MINOR_BITS bits means the channel on the single card, |
| 184 | * the highest bits means the card number. |
| 185 | */ |
| 186 | #define CARD_MINOR_BITS 4 /* How many bits in minor number are reserved |
| 187 | * for the single card */ |
| 188 | /* |
| 189 | * The following depends on CARD_MINOR_BITS. Unfortunately, the "MODULE_STRING" |
| 190 | * macro doesn't like anything other than the raw number as an argument :-( |
| 191 | */ |
| 192 | #define MAX_CARDS 16 |
| 193 | /* #define MAX_CARDS (1 << (8-CARD_MINOR_BITS)) */ |
| 194 | |
| 195 | #define DRIVER_RX_READY 0x0001 |
| 196 | #define DRIVER_TX_READY 0x0002 |
| 197 | #define DRIVER_TXMAP_SHIFT 2 |
| 198 | #define DRIVER_TXMAP_MASK 0x0c /* FIXME: 0xfc for 8-channel version */ |
| 199 | |
| 200 | /* |
| 201 | * for cosa->rxtx - indicates whether either transmit or receive is |
| 202 | * in progress. These values are mean number of the bit. |
| 203 | */ |
| 204 | #define TXBIT 0 |
| 205 | #define RXBIT 1 |
| 206 | #define IRQBIT 2 |
| 207 | |
| 208 | #define COSA_MTU 2000 /* FIXME: I don't know this exactly */ |
| 209 | |
| 210 | #undef DEBUG_DATA //1 /* Dump the data read or written to the channel */ |
| 211 | #undef DEBUG_IRQS //1 /* Print the message when the IRQ is received */ |
| 212 | #undef DEBUG_IO //1 /* Dump the I/O traffic */ |
| 213 | |
| 214 | #define TX_TIMEOUT (5*HZ) |
| 215 | |
| 216 | /* Maybe the following should be allocated dynamically */ |
| 217 | static struct cosa_data cosa_cards[MAX_CARDS]; |
| 218 | static int nr_cards; |
| 219 | |
| 220 | #ifdef COSA_ISA_AUTOPROBE |
| 221 | static int io[MAX_CARDS+1] = { 0x220, 0x228, 0x210, 0x218, 0, }; |
| 222 | /* NOTE: DMA is not autoprobed!!! */ |
| 223 | static int dma[MAX_CARDS+1] = { 1, 7, 1, 7, 1, 7, 1, 7, 0, }; |
| 224 | #else |
| 225 | static int io[MAX_CARDS+1]; |
| 226 | static int dma[MAX_CARDS+1]; |
| 227 | #endif |
| 228 | /* IRQ can be safely autoprobed */ |
| 229 | static int irq[MAX_CARDS+1] = { -1, -1, -1, -1, -1, -1, 0, }; |
| 230 | |
| 231 | /* for class stuff*/ |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 232 | static struct class *cosa_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | #ifdef MODULE |
| 235 | module_param_array(io, int, NULL, 0); |
| 236 | MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards"); |
| 237 | module_param_array(irq, int, NULL, 0); |
| 238 | MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards"); |
| 239 | module_param_array(dma, int, NULL, 0); |
| 240 | MODULE_PARM_DESC(dma, "The DMA channels of the COSA or SRP cards"); |
| 241 | |
| 242 | MODULE_AUTHOR("Jan \"Yenya\" Kasprzak, <kas@fi.muni.cz>"); |
| 243 | MODULE_DESCRIPTION("Modular driver for the COSA or SRP synchronous card"); |
| 244 | MODULE_LICENSE("GPL"); |
| 245 | #endif |
| 246 | |
| 247 | /* I use this mainly for testing purposes */ |
| 248 | #ifdef COSA_SLOW_IO |
| 249 | #define cosa_outb outb_p |
| 250 | #define cosa_outw outw_p |
| 251 | #define cosa_inb inb_p |
| 252 | #define cosa_inw inw_p |
| 253 | #else |
| 254 | #define cosa_outb outb |
| 255 | #define cosa_outw outw |
| 256 | #define cosa_inb inb |
| 257 | #define cosa_inw inw |
| 258 | #endif |
| 259 | |
| 260 | #define is_8bit(cosa) (!(cosa->datareg & 0x08)) |
| 261 | |
| 262 | #define cosa_getstatus(cosa) (cosa_inb(cosa->statusreg)) |
| 263 | #define cosa_putstatus(cosa, stat) (cosa_outb(stat, cosa->statusreg)) |
| 264 | #define cosa_getdata16(cosa) (cosa_inw(cosa->datareg)) |
| 265 | #define cosa_getdata8(cosa) (cosa_inb(cosa->datareg)) |
| 266 | #define cosa_putdata16(cosa, dt) (cosa_outw(dt, cosa->datareg)) |
| 267 | #define cosa_putdata8(cosa, dt) (cosa_outb(dt, cosa->datareg)) |
| 268 | |
| 269 | /* Initialization stuff */ |
| 270 | static int cosa_probe(int ioaddr, int irq, int dma); |
| 271 | |
| 272 | /* HW interface */ |
| 273 | static void cosa_enable_rx(struct channel_data *chan); |
| 274 | static void cosa_disable_rx(struct channel_data *chan); |
| 275 | static int cosa_start_tx(struct channel_data *channel, char *buf, int size); |
| 276 | static void cosa_kick(struct cosa_data *cosa); |
| 277 | static int cosa_dma_able(struct channel_data *chan, char *buf, int data); |
| 278 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 279 | /* Network device stuff */ |
| 280 | static int cosa_net_attach(struct net_device *dev, unsigned short encoding, |
| 281 | unsigned short parity); |
| 282 | static int cosa_net_open(struct net_device *d); |
| 283 | static int cosa_net_close(struct net_device *d); |
| 284 | static void cosa_net_timeout(struct net_device *d); |
Stephen Hemminger | d71a674 | 2009-08-31 19:50:47 +0000 | [diff] [blame] | 285 | static netdev_tx_t cosa_net_tx(struct sk_buff *skb, struct net_device *d); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 286 | static char *cosa_net_setup_rx(struct channel_data *channel, int size); |
| 287 | static int cosa_net_rx_done(struct channel_data *channel); |
| 288 | static int cosa_net_tx_done(struct channel_data *channel, int size); |
| 289 | static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* Character device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | static char *chrdev_setup_rx(struct channel_data *channel, int size); |
| 293 | static int chrdev_rx_done(struct channel_data *channel); |
| 294 | static int chrdev_tx_done(struct channel_data *channel, int size); |
| 295 | static ssize_t cosa_read(struct file *file, |
| 296 | char __user *buf, size_t count, loff_t *ppos); |
| 297 | static ssize_t cosa_write(struct file *file, |
| 298 | const char __user *buf, size_t count, loff_t *ppos); |
| 299 | static unsigned int cosa_poll(struct file *file, poll_table *poll); |
| 300 | static int cosa_open(struct inode *inode, struct file *file); |
| 301 | static int cosa_release(struct inode *inode, struct file *file); |
Alan Cox | 2395f0e | 2009-10-14 05:22:24 +0000 | [diff] [blame] | 302 | static long cosa_chardev_ioctl(struct file *file, unsigned int cmd, |
| 303 | unsigned long arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | #ifdef COSA_FASYNC_WORKING |
| 305 | static int cosa_fasync(struct inode *inode, struct file *file, int on); |
| 306 | #endif |
| 307 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 308 | static const struct file_operations cosa_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | .owner = THIS_MODULE, |
| 310 | .llseek = no_llseek, |
| 311 | .read = cosa_read, |
| 312 | .write = cosa_write, |
| 313 | .poll = cosa_poll, |
Alan Cox | 2395f0e | 2009-10-14 05:22:24 +0000 | [diff] [blame] | 314 | .unlocked_ioctl = cosa_chardev_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | .open = cosa_open, |
| 316 | .release = cosa_release, |
| 317 | #ifdef COSA_FASYNC_WORKING |
| 318 | .fasync = cosa_fasync, |
| 319 | #endif |
| 320 | }; |
| 321 | |
| 322 | /* Ioctls */ |
| 323 | static int cosa_start(struct cosa_data *cosa, int address); |
| 324 | static int cosa_reset(struct cosa_data *cosa); |
| 325 | static int cosa_download(struct cosa_data *cosa, void __user *a); |
| 326 | static int cosa_readmem(struct cosa_data *cosa, void __user *a); |
| 327 | |
| 328 | /* COSA/SRP ROM monitor */ |
| 329 | static int download(struct cosa_data *cosa, const char __user *data, int addr, int len); |
| 330 | static int startmicrocode(struct cosa_data *cosa, int address); |
| 331 | static int readmem(struct cosa_data *cosa, char __user *data, int addr, int len); |
| 332 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id); |
| 333 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 334 | /* Auxiliary functions */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | static int get_wait_data(struct cosa_data *cosa); |
| 336 | static int put_wait_data(struct cosa_data *cosa, int data); |
| 337 | static int puthexnumber(struct cosa_data *cosa, int number); |
| 338 | static void put_driver_status(struct cosa_data *cosa); |
| 339 | static void put_driver_status_nolock(struct cosa_data *cosa); |
| 340 | |
| 341 | /* Interrupt handling */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 342 | static irqreturn_t cosa_interrupt(int irq, void *cosa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | /* I/O ops debugging */ |
| 345 | #ifdef DEBUG_IO |
| 346 | static void debug_data_in(struct cosa_data *cosa, int data); |
| 347 | static void debug_data_out(struct cosa_data *cosa, int data); |
| 348 | static void debug_data_cmd(struct cosa_data *cosa, int data); |
| 349 | static void debug_status_in(struct cosa_data *cosa, int status); |
| 350 | static void debug_status_out(struct cosa_data *cosa, int status); |
| 351 | #endif |
| 352 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 353 | static inline struct channel_data* dev_to_chan(struct net_device *dev) |
| 354 | { |
| 355 | return (struct channel_data *)dev_to_hdlc(dev)->priv; |
| 356 | } |
| 357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | /* ---------- Initialization stuff ---------- */ |
| 359 | |
| 360 | static int __init cosa_init(void) |
| 361 | { |
| 362 | int i, err = 0; |
| 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (cosa_major > 0) { |
| 365 | if (register_chrdev(cosa_major, "cosa", &cosa_fops)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 366 | pr_warn("unable to get major %d\n", cosa_major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | err = -EIO; |
| 368 | goto out; |
| 369 | } |
| 370 | } else { |
| 371 | if (!(cosa_major=register_chrdev(0, "cosa", &cosa_fops))) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 372 | pr_warn("unable to register chardev\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | err = -EIO; |
| 374 | goto out; |
| 375 | } |
| 376 | } |
| 377 | for (i=0; i<MAX_CARDS; i++) |
| 378 | cosa_cards[i].num = -1; |
| 379 | for (i=0; io[i] != 0 && i < MAX_CARDS; i++) |
| 380 | cosa_probe(io[i], irq[i], dma[i]); |
| 381 | if (!nr_cards) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 382 | pr_warn("no devices found\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | unregister_chrdev(cosa_major, "cosa"); |
| 384 | err = -ENODEV; |
| 385 | goto out; |
| 386 | } |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 387 | cosa_class = class_create(THIS_MODULE, "cosa"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | if (IS_ERR(cosa_class)) { |
| 389 | err = PTR_ERR(cosa_class); |
| 390 | goto out_chrdev; |
| 391 | } |
Greg Kroah-Hartman | e17da9c | 2008-05-21 12:52:33 -0700 | [diff] [blame] | 392 | for (i = 0; i < nr_cards; i++) |
Greg Kroah-Hartman | 6e05d6c | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 393 | device_create(cosa_class, NULL, MKDEV(cosa_major, i), NULL, |
| 394 | "cosa%d", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | err = 0; |
| 396 | goto out; |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | out_chrdev: |
| 399 | unregister_chrdev(cosa_major, "cosa"); |
| 400 | out: |
| 401 | return err; |
| 402 | } |
| 403 | module_init(cosa_init); |
| 404 | |
| 405 | static void __exit cosa_exit(void) |
| 406 | { |
| 407 | struct cosa_data *cosa; |
| 408 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 410 | for (i = 0; i < nr_cards; i++) |
Tony Jones | 02ff82c | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 411 | device_destroy(cosa_class, MKDEV(cosa_major, i)); |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 412 | class_destroy(cosa_class); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 413 | |
| 414 | for (cosa = cosa_cards; nr_cards--; cosa++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | /* Clean up the per-channel data */ |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 416 | for (i = 0; i < cosa->nchannels; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | /* Chardev driver has no alloc'd per-channel data */ |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 418 | unregister_hdlc_device(cosa->chan[i].netdev); |
| 419 | free_netdev(cosa->chan[i].netdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | } |
| 421 | /* Clean up the per-card data */ |
| 422 | kfree(cosa->chan); |
| 423 | kfree(cosa->bouncebuf); |
| 424 | free_irq(cosa->irq, cosa); |
| 425 | free_dma(cosa->dma); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 426 | release_region(cosa->datareg, is_8bit(cosa) ? 2 : 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | unregister_chrdev(cosa_major, "cosa"); |
| 429 | } |
| 430 | module_exit(cosa_exit); |
| 431 | |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 432 | static const struct net_device_ops cosa_ops = { |
| 433 | .ndo_open = cosa_net_open, |
| 434 | .ndo_stop = cosa_net_close, |
| 435 | .ndo_change_mtu = hdlc_change_mtu, |
| 436 | .ndo_start_xmit = hdlc_start_xmit, |
| 437 | .ndo_do_ioctl = cosa_net_ioctl, |
| 438 | .ndo_tx_timeout = cosa_net_timeout, |
| 439 | }; |
| 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | static int cosa_probe(int base, int irq, int dma) |
| 442 | { |
| 443 | struct cosa_data *cosa = cosa_cards+nr_cards; |
| 444 | int i, err = 0; |
| 445 | |
| 446 | memset(cosa, 0, sizeof(struct cosa_data)); |
| 447 | |
| 448 | /* Checking validity of parameters: */ |
| 449 | /* IRQ should be 2-7 or 10-15; negative IRQ means autoprobe */ |
| 450 | if ((irq >= 0 && irq < 2) || irq > 15 || (irq < 10 && irq > 7)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 451 | pr_info("invalid IRQ %d\n", irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | return -1; |
| 453 | } |
| 454 | /* I/O address should be between 0x100 and 0x3ff and should be |
| 455 | * multiple of 8. */ |
| 456 | if (base < 0x100 || base > 0x3ff || base & 0x7) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 457 | pr_info("invalid I/O address 0x%x\n", base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | return -1; |
| 459 | } |
| 460 | /* DMA should be 0,1 or 3-7 */ |
| 461 | if (dma < 0 || dma == 4 || dma > 7) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 462 | pr_info("invalid DMA %d\n", dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | return -1; |
| 464 | } |
| 465 | /* and finally, on 16-bit COSA DMA should be 4-7 and |
| 466 | * I/O base should not be multiple of 0x10 */ |
| 467 | if (((base & 0x8) && dma < 4) || (!(base & 0x8) && dma > 3)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 468 | pr_info("8/16 bit base and DMA mismatch (base=0x%x, dma=%d)\n", |
| 469 | base, dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | return -1; |
| 471 | } |
| 472 | |
| 473 | cosa->dma = dma; |
| 474 | cosa->datareg = base; |
| 475 | cosa->statusreg = is_8bit(cosa)?base+1:base+2; |
| 476 | spin_lock_init(&cosa->lock); |
| 477 | |
| 478 | if (!request_region(base, is_8bit(cosa)?2:4,"cosa")) |
| 479 | return -1; |
| 480 | |
| 481 | if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 482 | printk(KERN_DEBUG "probe at 0x%x failed.\n", base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | err = -1; |
| 484 | goto err_out; |
| 485 | } |
| 486 | |
| 487 | /* Test the validity of identification string */ |
| 488 | if (!strncmp(cosa->id_string, "SRP", 3)) |
| 489 | cosa->type = "srp"; |
| 490 | else if (!strncmp(cosa->id_string, "COSA", 4)) |
| 491 | cosa->type = is_8bit(cosa)? "cosa8": "cosa16"; |
| 492 | else { |
| 493 | /* Print a warning only if we are not autoprobing */ |
| 494 | #ifndef COSA_ISA_AUTOPROBE |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 495 | pr_info("valid signature not found at 0x%x\n", base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | #endif |
| 497 | err = -1; |
| 498 | goto err_out; |
| 499 | } |
| 500 | /* Update the name of the region now we know the type of card */ |
| 501 | release_region(base, is_8bit(cosa)?2:4); |
| 502 | if (!request_region(base, is_8bit(cosa)?2:4, cosa->type)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 503 | printk(KERN_DEBUG "changing name at 0x%x failed.\n", base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | return -1; |
| 505 | } |
| 506 | |
| 507 | /* Now do IRQ autoprobe */ |
| 508 | if (irq < 0) { |
| 509 | unsigned long irqs; |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 510 | /* pr_info("IRQ autoprobe\n"); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | irqs = probe_irq_on(); |
| 512 | /* |
| 513 | * Enable interrupt on tx buffer empty (it sure is) |
| 514 | * really sure ? |
| 515 | * FIXME: When this code is not used as module, we should |
| 516 | * probably call udelay() instead of the interruptible sleep. |
| 517 | */ |
| 518 | set_current_state(TASK_INTERRUPTIBLE); |
| 519 | cosa_putstatus(cosa, SR_TX_INT_ENA); |
| 520 | schedule_timeout(30); |
| 521 | irq = probe_irq_off(irqs); |
| 522 | /* Disable all IRQs from the card */ |
| 523 | cosa_putstatus(cosa, 0); |
| 524 | /* Empty the received data register */ |
| 525 | cosa_getdata8(cosa); |
| 526 | |
| 527 | if (irq < 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 528 | pr_info("multiple interrupts obtained (%d, board at 0x%x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | irq, cosa->datareg); |
| 530 | err = -1; |
| 531 | goto err_out; |
| 532 | } |
| 533 | if (irq == 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 534 | pr_info("no interrupt obtained (board at 0x%x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | cosa->datareg); |
| 536 | /* return -1; */ |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | cosa->irq = irq; |
| 541 | cosa->num = nr_cards; |
| 542 | cosa->usage = 0; |
| 543 | cosa->nchannels = 2; /* FIXME: how to determine this? */ |
| 544 | |
| 545 | if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa)) { |
| 546 | err = -1; |
| 547 | goto err_out; |
| 548 | } |
| 549 | if (request_dma(cosa->dma, cosa->type)) { |
| 550 | err = -1; |
| 551 | goto err_out1; |
| 552 | } |
| 553 | |
| 554 | cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL|GFP_DMA); |
| 555 | if (!cosa->bouncebuf) { |
| 556 | err = -ENOMEM; |
| 557 | goto err_out2; |
| 558 | } |
| 559 | sprintf(cosa->name, "cosa%d", cosa->num); |
| 560 | |
| 561 | /* Initialize the per-channel data */ |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 562 | cosa->chan = kcalloc(cosa->nchannels, sizeof(struct channel_data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | if (!cosa->chan) { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 564 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | goto err_out3; |
| 566 | } |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 567 | |
| 568 | for (i = 0; i < cosa->nchannels; i++) { |
| 569 | struct channel_data *chan = &cosa->chan[i]; |
| 570 | |
| 571 | chan->cosa = cosa; |
| 572 | chan->num = i; |
| 573 | sprintf(chan->name, "cosa%dc%d", chan->cosa->num, i); |
| 574 | |
| 575 | /* Initialize the chardev data structures */ |
| 576 | mutex_init(&chan->rlock); |
Thomas Gleixner | d198550 | 2010-09-07 14:32:25 +0000 | [diff] [blame] | 577 | sema_init(&chan->wsem, 1); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 578 | |
| 579 | /* Register the network interface */ |
| 580 | if (!(chan->netdev = alloc_hdlcdev(chan))) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 581 | pr_warn("%s: alloc_hdlcdev failed\n", chan->name); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 582 | goto err_hdlcdev; |
| 583 | } |
| 584 | dev_to_hdlc(chan->netdev)->attach = cosa_net_attach; |
| 585 | dev_to_hdlc(chan->netdev)->xmit = cosa_net_tx; |
Krzysztof Hałasa | 991990a | 2009-01-08 22:52:11 +0100 | [diff] [blame] | 586 | chan->netdev->netdev_ops = &cosa_ops; |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 587 | chan->netdev->watchdog_timeo = TX_TIMEOUT; |
| 588 | chan->netdev->base_addr = chan->cosa->datareg; |
| 589 | chan->netdev->irq = chan->cosa->irq; |
| 590 | chan->netdev->dma = chan->cosa->dma; |
| 591 | if (register_hdlc_device(chan->netdev)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 592 | netdev_warn(chan->netdev, |
| 593 | "register_hdlc_device() failed\n"); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 594 | free_netdev(chan->netdev); |
| 595 | goto err_hdlcdev; |
| 596 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | } |
| 598 | |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 599 | pr_info("cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | cosa->num, cosa->id_string, cosa->type, |
| 601 | cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels); |
| 602 | |
| 603 | return nr_cards++; |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 604 | |
| 605 | err_hdlcdev: |
| 606 | while (i-- > 0) { |
| 607 | unregister_hdlc_device(cosa->chan[i].netdev); |
| 608 | free_netdev(cosa->chan[i].netdev); |
| 609 | } |
| 610 | kfree(cosa->chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | err_out3: |
| 612 | kfree(cosa->bouncebuf); |
| 613 | err_out2: |
| 614 | free_dma(cosa->dma); |
| 615 | err_out1: |
| 616 | free_irq(cosa->irq, cosa); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 617 | err_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | release_region(cosa->datareg,is_8bit(cosa)?2:4); |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 619 | pr_notice("cosa%d: allocating resources failed\n", cosa->num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | return err; |
| 621 | } |
| 622 | |
| 623 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 624 | /*---------- network device ---------- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 626 | static int cosa_net_attach(struct net_device *dev, unsigned short encoding, |
| 627 | unsigned short parity) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 629 | if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT) |
| 630 | return 0; |
| 631 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |
| 633 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 634 | static int cosa_net_open(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 636 | struct channel_data *chan = dev_to_chan(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | int err; |
| 638 | unsigned long flags; |
| 639 | |
| 640 | if (!(chan->cosa->firmware_status & COSA_FW_START)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 641 | pr_notice("%s: start the firmware first (status %d)\n", |
| 642 | chan->cosa->name, chan->cosa->firmware_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | return -EPERM; |
| 644 | } |
| 645 | spin_lock_irqsave(&chan->cosa->lock, flags); |
| 646 | if (chan->usage != 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 647 | pr_warn("%s: cosa_net_open called with usage count %d\n", |
| 648 | chan->name, chan->usage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | spin_unlock_irqrestore(&chan->cosa->lock, flags); |
| 650 | return -EBUSY; |
| 651 | } |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 652 | chan->setup_rx = cosa_net_setup_rx; |
| 653 | chan->tx_done = cosa_net_tx_done; |
| 654 | chan->rx_done = cosa_net_rx_done; |
| 655 | chan->usage = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | chan->cosa->usage++; |
| 657 | spin_unlock_irqrestore(&chan->cosa->lock, flags); |
| 658 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 659 | err = hdlc_open(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | if (err) { |
| 661 | spin_lock_irqsave(&chan->cosa->lock, flags); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 662 | chan->usage = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | chan->cosa->usage--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | spin_unlock_irqrestore(&chan->cosa->lock, flags); |
| 665 | return err; |
| 666 | } |
| 667 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 668 | netif_start_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | cosa_enable_rx(chan); |
| 670 | return 0; |
| 671 | } |
| 672 | |
Stephen Hemminger | d71a674 | 2009-08-31 19:50:47 +0000 | [diff] [blame] | 673 | static netdev_tx_t cosa_net_tx(struct sk_buff *skb, |
| 674 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 676 | struct channel_data *chan = dev_to_chan(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | netif_stop_queue(dev); |
| 679 | |
| 680 | chan->tx_skb = skb; |
| 681 | cosa_start_tx(chan, skb->data, skb->len); |
Stephen Hemminger | d71a674 | 2009-08-31 19:50:47 +0000 | [diff] [blame] | 682 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | } |
| 684 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 685 | static void cosa_net_timeout(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 687 | struct channel_data *chan = dev_to_chan(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | if (test_bit(RXBIT, &chan->cosa->rxtx)) { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 690 | chan->netdev->stats.rx_errors++; |
| 691 | chan->netdev->stats.rx_missed_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } else { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 693 | chan->netdev->stats.tx_errors++; |
| 694 | chan->netdev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | cosa_kick(chan->cosa); |
| 697 | if (chan->tx_skb) { |
| 698 | dev_kfree_skb(chan->tx_skb); |
| 699 | chan->tx_skb = NULL; |
| 700 | } |
| 701 | netif_wake_queue(dev); |
| 702 | } |
| 703 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 704 | static int cosa_net_close(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | { |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 706 | struct channel_data *chan = dev_to_chan(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | unsigned long flags; |
| 708 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 709 | netif_stop_queue(dev); |
| 710 | hdlc_close(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | cosa_disable_rx(chan); |
| 712 | spin_lock_irqsave(&chan->cosa->lock, flags); |
| 713 | if (chan->rx_skb) { |
| 714 | kfree_skb(chan->rx_skb); |
| 715 | chan->rx_skb = NULL; |
| 716 | } |
| 717 | if (chan->tx_skb) { |
| 718 | kfree_skb(chan->tx_skb); |
| 719 | chan->tx_skb = NULL; |
| 720 | } |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 721 | chan->usage = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | chan->cosa->usage--; |
| 723 | spin_unlock_irqrestore(&chan->cosa->lock, flags); |
| 724 | return 0; |
| 725 | } |
| 726 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 727 | static char *cosa_net_setup_rx(struct channel_data *chan, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | { |
| 729 | /* |
| 730 | * We can safely fall back to non-dma-able memory, because we have |
| 731 | * the cosa->bouncebuf pre-allocated. |
| 732 | */ |
Wei Yongjun | fbbfb98 | 2009-02-25 00:22:41 +0000 | [diff] [blame] | 733 | kfree_skb(chan->rx_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | chan->rx_skb = dev_alloc_skb(size); |
| 735 | if (chan->rx_skb == NULL) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 736 | pr_notice("%s: Memory squeeze, dropping packet\n", chan->name); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 737 | chan->netdev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | return NULL; |
| 739 | } |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 740 | chan->netdev->trans_start = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | return skb_put(chan->rx_skb, size); |
| 742 | } |
| 743 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 744 | static int cosa_net_rx_done(struct channel_data *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
| 746 | if (!chan->rx_skb) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 747 | pr_warn("%s: rx_done with empty skb!\n", chan->name); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 748 | chan->netdev->stats.rx_errors++; |
| 749 | chan->netdev->stats.rx_frame_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return 0; |
| 751 | } |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 752 | chan->rx_skb->protocol = hdlc_type_trans(chan->rx_skb, chan->netdev); |
| 753 | chan->rx_skb->dev = chan->netdev; |
David S. Miller | 2f7826c | 2007-03-26 02:00:58 -0700 | [diff] [blame] | 754 | skb_reset_mac_header(chan->rx_skb); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 755 | chan->netdev->stats.rx_packets++; |
| 756 | chan->netdev->stats.rx_bytes += chan->cosa->rxsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | netif_rx(chan->rx_skb); |
| 758 | chan->rx_skb = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | /* ARGSUSED */ |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 763 | static int cosa_net_tx_done(struct channel_data *chan, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | { |
| 765 | if (!chan->tx_skb) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 766 | pr_warn("%s: tx_done with empty skb!\n", chan->name); |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 767 | chan->netdev->stats.tx_errors++; |
| 768 | chan->netdev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | return 1; |
| 770 | } |
| 771 | dev_kfree_skb_irq(chan->tx_skb); |
| 772 | chan->tx_skb = NULL; |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 773 | chan->netdev->stats.tx_packets++; |
| 774 | chan->netdev->stats.tx_bytes += size; |
| 775 | netif_wake_queue(chan->netdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | return 1; |
| 777 | } |
| 778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | /*---------- Character device ---------- */ |
| 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | static ssize_t cosa_read(struct file *file, |
| 782 | char __user *buf, size_t count, loff_t *ppos) |
| 783 | { |
| 784 | DECLARE_WAITQUEUE(wait, current); |
| 785 | unsigned long flags; |
| 786 | struct channel_data *chan = file->private_data; |
| 787 | struct cosa_data *cosa = chan->cosa; |
| 788 | char *kbuf; |
| 789 | |
| 790 | if (!(cosa->firmware_status & COSA_FW_START)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 791 | pr_notice("%s: start the firmware first (status %d)\n", |
| 792 | cosa->name, cosa->firmware_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | return -EPERM; |
| 794 | } |
Matthias Kaehlcke | 6387c4b | 2008-03-05 18:53:01 -0800 | [diff] [blame] | 795 | if (mutex_lock_interruptible(&chan->rlock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | return -ERESTARTSYS; |
| 797 | |
Joe Perches | 1d5d1fd | 2013-02-03 17:28:12 +0000 | [diff] [blame] | 798 | chan->rxdata = kmalloc(COSA_MTU, GFP_DMA|GFP_KERNEL); |
| 799 | if (chan->rxdata == NULL) { |
Matthias Kaehlcke | 6387c4b | 2008-03-05 18:53:01 -0800 | [diff] [blame] | 800 | mutex_unlock(&chan->rlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | return -ENOMEM; |
| 802 | } |
| 803 | |
| 804 | chan->rx_status = 0; |
| 805 | cosa_enable_rx(chan); |
| 806 | spin_lock_irqsave(&cosa->lock, flags); |
| 807 | add_wait_queue(&chan->rxwaitq, &wait); |
Rudy Matela | 640462c | 2009-12-09 11:35:40 -0300 | [diff] [blame] | 808 | while (!chan->rx_status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | current->state = TASK_INTERRUPTIBLE; |
| 810 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 811 | schedule(); |
| 812 | spin_lock_irqsave(&cosa->lock, flags); |
| 813 | if (signal_pending(current) && chan->rx_status == 0) { |
| 814 | chan->rx_status = 1; |
| 815 | remove_wait_queue(&chan->rxwaitq, &wait); |
| 816 | current->state = TASK_RUNNING; |
| 817 | spin_unlock_irqrestore(&cosa->lock, flags); |
Matthias Kaehlcke | 6387c4b | 2008-03-05 18:53:01 -0800 | [diff] [blame] | 818 | mutex_unlock(&chan->rlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return -ERESTARTSYS; |
| 820 | } |
| 821 | } |
| 822 | remove_wait_queue(&chan->rxwaitq, &wait); |
| 823 | current->state = TASK_RUNNING; |
| 824 | kbuf = chan->rxdata; |
| 825 | count = chan->rxsize; |
| 826 | spin_unlock_irqrestore(&cosa->lock, flags); |
Matthias Kaehlcke | 6387c4b | 2008-03-05 18:53:01 -0800 | [diff] [blame] | 827 | mutex_unlock(&chan->rlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
| 829 | if (copy_to_user(buf, kbuf, count)) { |
| 830 | kfree(kbuf); |
| 831 | return -EFAULT; |
| 832 | } |
| 833 | kfree(kbuf); |
| 834 | return count; |
| 835 | } |
| 836 | |
| 837 | static char *chrdev_setup_rx(struct channel_data *chan, int size) |
| 838 | { |
| 839 | /* Expect size <= COSA_MTU */ |
| 840 | chan->rxsize = size; |
| 841 | return chan->rxdata; |
| 842 | } |
| 843 | |
| 844 | static int chrdev_rx_done(struct channel_data *chan) |
| 845 | { |
| 846 | if (chan->rx_status) { /* Reader has died */ |
| 847 | kfree(chan->rxdata); |
| 848 | up(&chan->wsem); |
| 849 | } |
| 850 | chan->rx_status = 1; |
| 851 | wake_up_interruptible(&chan->rxwaitq); |
| 852 | return 1; |
| 853 | } |
| 854 | |
| 855 | |
| 856 | static ssize_t cosa_write(struct file *file, |
| 857 | const char __user *buf, size_t count, loff_t *ppos) |
| 858 | { |
| 859 | DECLARE_WAITQUEUE(wait, current); |
| 860 | struct channel_data *chan = file->private_data; |
| 861 | struct cosa_data *cosa = chan->cosa; |
| 862 | unsigned long flags; |
| 863 | char *kbuf; |
| 864 | |
| 865 | if (!(cosa->firmware_status & COSA_FW_START)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 866 | pr_notice("%s: start the firmware first (status %d)\n", |
| 867 | cosa->name, cosa->firmware_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | return -EPERM; |
| 869 | } |
| 870 | if (down_interruptible(&chan->wsem)) |
| 871 | return -ERESTARTSYS; |
| 872 | |
| 873 | if (count > COSA_MTU) |
| 874 | count = COSA_MTU; |
| 875 | |
| 876 | /* Allocate the buffer */ |
Joe Perches | 1d5d1fd | 2013-02-03 17:28:12 +0000 | [diff] [blame] | 877 | kbuf = kmalloc(count, GFP_KERNEL|GFP_DMA); |
| 878 | if (kbuf == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | up(&chan->wsem); |
| 880 | return -ENOMEM; |
| 881 | } |
| 882 | if (copy_from_user(kbuf, buf, count)) { |
| 883 | up(&chan->wsem); |
| 884 | kfree(kbuf); |
| 885 | return -EFAULT; |
| 886 | } |
| 887 | chan->tx_status=0; |
| 888 | cosa_start_tx(chan, kbuf, count); |
| 889 | |
| 890 | spin_lock_irqsave(&cosa->lock, flags); |
| 891 | add_wait_queue(&chan->txwaitq, &wait); |
Rudy Matela | 640462c | 2009-12-09 11:35:40 -0300 | [diff] [blame] | 892 | while (!chan->tx_status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | current->state = TASK_INTERRUPTIBLE; |
| 894 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 895 | schedule(); |
| 896 | spin_lock_irqsave(&cosa->lock, flags); |
| 897 | if (signal_pending(current) && chan->tx_status == 0) { |
| 898 | chan->tx_status = 1; |
| 899 | remove_wait_queue(&chan->txwaitq, &wait); |
| 900 | current->state = TASK_RUNNING; |
| 901 | chan->tx_status = 1; |
| 902 | spin_unlock_irqrestore(&cosa->lock, flags); |
Dan Carpenter | 40be261 | 2009-11-29 06:02:55 +0000 | [diff] [blame] | 903 | up(&chan->wsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | return -ERESTARTSYS; |
| 905 | } |
| 906 | } |
| 907 | remove_wait_queue(&chan->txwaitq, &wait); |
| 908 | current->state = TASK_RUNNING; |
| 909 | up(&chan->wsem); |
| 910 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 911 | kfree(kbuf); |
| 912 | return count; |
| 913 | } |
| 914 | |
| 915 | static int chrdev_tx_done(struct channel_data *chan, int size) |
| 916 | { |
| 917 | if (chan->tx_status) { /* Writer was interrupted */ |
| 918 | kfree(chan->txbuf); |
| 919 | up(&chan->wsem); |
| 920 | } |
| 921 | chan->tx_status = 1; |
| 922 | wake_up_interruptible(&chan->txwaitq); |
| 923 | return 1; |
| 924 | } |
| 925 | |
| 926 | static unsigned int cosa_poll(struct file *file, poll_table *poll) |
| 927 | { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 928 | pr_info("cosa_poll is here\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | return 0; |
| 930 | } |
| 931 | |
| 932 | static int cosa_open(struct inode *inode, struct file *file) |
| 933 | { |
| 934 | struct cosa_data *cosa; |
| 935 | struct channel_data *chan; |
| 936 | unsigned long flags; |
| 937 | int n; |
Jonathan Corbet | 0911810 | 2008-05-15 09:21:33 -0600 | [diff] [blame] | 938 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Arnd Bergmann | 15fd0cd | 2010-07-11 11:18:57 +0000 | [diff] [blame] | 940 | mutex_lock(&cosa_chardev_mutex); |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 941 | if ((n=iminor(file_inode(file))>>CARD_MINOR_BITS) |
Jonathan Corbet | 0911810 | 2008-05-15 09:21:33 -0600 | [diff] [blame] | 942 | >= nr_cards) { |
| 943 | ret = -ENODEV; |
| 944 | goto out; |
| 945 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | cosa = cosa_cards+n; |
| 947 | |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 948 | if ((n=iminor(file_inode(file)) |
Jonathan Corbet | 0911810 | 2008-05-15 09:21:33 -0600 | [diff] [blame] | 949 | & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) { |
| 950 | ret = -ENODEV; |
| 951 | goto out; |
| 952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | chan = cosa->chan + n; |
| 954 | |
| 955 | file->private_data = chan; |
| 956 | |
| 957 | spin_lock_irqsave(&cosa->lock, flags); |
| 958 | |
| 959 | if (chan->usage < 0) { /* in netdev mode */ |
| 960 | spin_unlock_irqrestore(&cosa->lock, flags); |
Jonathan Corbet | 0911810 | 2008-05-15 09:21:33 -0600 | [diff] [blame] | 961 | ret = -EBUSY; |
| 962 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | } |
| 964 | cosa->usage++; |
| 965 | chan->usage++; |
| 966 | |
| 967 | chan->tx_done = chrdev_tx_done; |
| 968 | chan->setup_rx = chrdev_setup_rx; |
| 969 | chan->rx_done = chrdev_rx_done; |
| 970 | spin_unlock_irqrestore(&cosa->lock, flags); |
Jonathan Corbet | 0911810 | 2008-05-15 09:21:33 -0600 | [diff] [blame] | 971 | out: |
Arnd Bergmann | 15fd0cd | 2010-07-11 11:18:57 +0000 | [diff] [blame] | 972 | mutex_unlock(&cosa_chardev_mutex); |
Jonathan Corbet | 0911810 | 2008-05-15 09:21:33 -0600 | [diff] [blame] | 973 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | } |
| 975 | |
| 976 | static int cosa_release(struct inode *inode, struct file *file) |
| 977 | { |
| 978 | struct channel_data *channel = file->private_data; |
| 979 | struct cosa_data *cosa; |
| 980 | unsigned long flags; |
| 981 | |
| 982 | cosa = channel->cosa; |
| 983 | spin_lock_irqsave(&cosa->lock, flags); |
| 984 | cosa->usage--; |
| 985 | channel->usage--; |
| 986 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | #ifdef COSA_FASYNC_WORKING |
| 991 | static struct fasync_struct *fasync[256] = { NULL, }; |
| 992 | |
| 993 | /* To be done ... */ |
| 994 | static int cosa_fasync(struct inode *inode, struct file *file, int on) |
| 995 | { |
| 996 | int port = iminor(inode); |
Jonathan Corbet | 60aa492 | 2009-02-01 14:52:56 -0700 | [diff] [blame] | 997 | |
| 998 | return fasync_helper(inode, file, on, &fasync[port]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | #endif |
| 1001 | |
| 1002 | |
| 1003 | /* ---------- Ioctls ---------- */ |
| 1004 | |
| 1005 | /* |
| 1006 | * Ioctl subroutines can safely be made inline, because they are called |
| 1007 | * only from cosa_ioctl(). |
| 1008 | */ |
| 1009 | static inline int cosa_reset(struct cosa_data *cosa) |
| 1010 | { |
| 1011 | char idstring[COSA_MAX_ID_STRING]; |
| 1012 | if (cosa->usage > 1) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1013 | pr_info("cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | cosa->num, cosa->usage); |
| 1015 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_START); |
| 1016 | if (cosa_reset_and_read_id(cosa, idstring) < 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1017 | pr_notice("cosa%d: reset failed\n", cosa->num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | return -EIO; |
| 1019 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1020 | pr_info("cosa%d: resetting device: %s\n", cosa->num, idstring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | cosa->firmware_status |= COSA_FW_RESET; |
| 1022 | return 0; |
| 1023 | } |
| 1024 | |
| 1025 | /* High-level function to download data into COSA memory. Calls download() */ |
| 1026 | static inline int cosa_download(struct cosa_data *cosa, void __user *arg) |
| 1027 | { |
| 1028 | struct cosa_download d; |
| 1029 | int i; |
| 1030 | |
| 1031 | if (cosa->usage > 1) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1032 | pr_info("%s: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | cosa->name, cosa->usage); |
| 1034 | if (!(cosa->firmware_status & COSA_FW_RESET)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1035 | pr_notice("%s: reset the card first (status %d)\n", |
| 1036 | cosa->name, cosa->firmware_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | return -EPERM; |
| 1038 | } |
| 1039 | |
| 1040 | if (copy_from_user(&d, arg, sizeof(d))) |
| 1041 | return -EFAULT; |
| 1042 | |
| 1043 | if (d.addr < 0 || d.addr > COSA_MAX_FIRMWARE_SIZE) |
| 1044 | return -EINVAL; |
| 1045 | if (d.len < 0 || d.len > COSA_MAX_FIRMWARE_SIZE) |
| 1046 | return -EINVAL; |
| 1047 | |
| 1048 | |
| 1049 | /* If something fails, force the user to reset the card */ |
| 1050 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_DOWNLOAD); |
| 1051 | |
| 1052 | i = download(cosa, d.code, d.len, d.addr); |
| 1053 | if (i < 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1054 | pr_notice("cosa%d: microcode download failed: %d\n", |
| 1055 | cosa->num, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | return -EIO; |
| 1057 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1058 | pr_info("cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | cosa->num, d.len, d.addr); |
| 1060 | cosa->firmware_status |= COSA_FW_RESET|COSA_FW_DOWNLOAD; |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
| 1064 | /* High-level function to read COSA memory. Calls readmem() */ |
| 1065 | static inline int cosa_readmem(struct cosa_data *cosa, void __user *arg) |
| 1066 | { |
| 1067 | struct cosa_download d; |
| 1068 | int i; |
| 1069 | |
| 1070 | if (cosa->usage > 1) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1071 | pr_info("cosa%d: WARNING: readmem requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | cosa->num, cosa->usage); |
| 1073 | if (!(cosa->firmware_status & COSA_FW_RESET)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1074 | pr_notice("%s: reset the card first (status %d)\n", |
| 1075 | cosa->name, cosa->firmware_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | return -EPERM; |
| 1077 | } |
| 1078 | |
| 1079 | if (copy_from_user(&d, arg, sizeof(d))) |
| 1080 | return -EFAULT; |
| 1081 | |
| 1082 | /* If something fails, force the user to reset the card */ |
| 1083 | cosa->firmware_status &= ~COSA_FW_RESET; |
| 1084 | |
| 1085 | i = readmem(cosa, d.code, d.len, d.addr); |
| 1086 | if (i < 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1087 | pr_notice("cosa%d: reading memory failed: %d\n", cosa->num, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | return -EIO; |
| 1089 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1090 | pr_info("cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | cosa->num, d.len, d.addr); |
| 1092 | cosa->firmware_status |= COSA_FW_RESET; |
| 1093 | return 0; |
| 1094 | } |
| 1095 | |
| 1096 | /* High-level function to start microcode. Calls startmicrocode(). */ |
| 1097 | static inline int cosa_start(struct cosa_data *cosa, int address) |
| 1098 | { |
| 1099 | int i; |
| 1100 | |
| 1101 | if (cosa->usage > 1) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1102 | pr_info("cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | cosa->num, cosa->usage); |
| 1104 | |
| 1105 | if ((cosa->firmware_status & (COSA_FW_RESET|COSA_FW_DOWNLOAD)) |
| 1106 | != (COSA_FW_RESET|COSA_FW_DOWNLOAD)) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1107 | pr_notice("%s: download the microcode and/or reset the card first (status %d)\n", |
| 1108 | cosa->name, cosa->firmware_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | return -EPERM; |
| 1110 | } |
| 1111 | cosa->firmware_status &= ~COSA_FW_RESET; |
| 1112 | if ((i=startmicrocode(cosa, address)) < 0) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1113 | pr_notice("cosa%d: start microcode at 0x%04x failed: %d\n", |
| 1114 | cosa->num, address, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | return -EIO; |
| 1116 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1117 | pr_info("cosa%d: starting microcode at 0x%04x\n", cosa->num, address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | cosa->startaddr = address; |
| 1119 | cosa->firmware_status |= COSA_FW_START; |
| 1120 | return 0; |
| 1121 | } |
| 1122 | |
| 1123 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ |
| 1124 | static inline int cosa_getidstr(struct cosa_data *cosa, char __user *string) |
| 1125 | { |
| 1126 | int l = strlen(cosa->id_string)+1; |
| 1127 | if (copy_to_user(string, cosa->id_string, l)) |
| 1128 | return -EFAULT; |
| 1129 | return l; |
| 1130 | } |
| 1131 | |
| 1132 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ |
| 1133 | static inline int cosa_gettype(struct cosa_data *cosa, char __user *string) |
| 1134 | { |
| 1135 | int l = strlen(cosa->type)+1; |
| 1136 | if (copy_to_user(string, cosa->type, l)) |
| 1137 | return -EFAULT; |
| 1138 | return l; |
| 1139 | } |
| 1140 | |
| 1141 | static int cosa_ioctl_common(struct cosa_data *cosa, |
| 1142 | struct channel_data *channel, unsigned int cmd, unsigned long arg) |
| 1143 | { |
| 1144 | void __user *argp = (void __user *)arg; |
Rudy Matela | 640462c | 2009-12-09 11:35:40 -0300 | [diff] [blame] | 1145 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | case COSAIORSET: /* Reset the device */ |
| 1147 | if (!capable(CAP_NET_ADMIN)) |
| 1148 | return -EACCES; |
| 1149 | return cosa_reset(cosa); |
| 1150 | case COSAIOSTRT: /* Start the firmware */ |
| 1151 | if (!capable(CAP_SYS_RAWIO)) |
| 1152 | return -EACCES; |
| 1153 | return cosa_start(cosa, arg); |
| 1154 | case COSAIODOWNLD: /* Download the firmware */ |
| 1155 | if (!capable(CAP_SYS_RAWIO)) |
| 1156 | return -EACCES; |
| 1157 | |
| 1158 | return cosa_download(cosa, argp); |
| 1159 | case COSAIORMEM: |
| 1160 | if (!capable(CAP_SYS_RAWIO)) |
| 1161 | return -EACCES; |
| 1162 | return cosa_readmem(cosa, argp); |
| 1163 | case COSAIORTYPE: |
| 1164 | return cosa_gettype(cosa, argp); |
| 1165 | case COSAIORIDSTR: |
| 1166 | return cosa_getidstr(cosa, argp); |
| 1167 | case COSAIONRCARDS: |
| 1168 | return nr_cards; |
| 1169 | case COSAIONRCHANS: |
| 1170 | return cosa->nchannels; |
| 1171 | case COSAIOBMSET: |
| 1172 | if (!capable(CAP_SYS_RAWIO)) |
| 1173 | return -EACCES; |
| 1174 | if (is_8bit(cosa)) |
| 1175 | return -EINVAL; |
| 1176 | if (arg != COSA_BM_OFF && arg != COSA_BM_ON) |
| 1177 | return -EINVAL; |
| 1178 | cosa->busmaster = arg; |
| 1179 | return 0; |
| 1180 | case COSAIOBMGET: |
| 1181 | return cosa->busmaster; |
| 1182 | } |
| 1183 | return -ENOIOCTLCMD; |
| 1184 | } |
| 1185 | |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 1186 | static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | { |
| 1188 | int rv; |
Krzysztof Hałasa | aca25753 | 2008-07-01 23:40:29 +0200 | [diff] [blame] | 1189 | struct channel_data *chan = dev_to_chan(dev); |
| 1190 | rv = cosa_ioctl_common(chan->cosa, chan, cmd, |
| 1191 | (unsigned long)ifr->ifr_data); |
| 1192 | if (rv != -ENOIOCTLCMD) |
| 1193 | return rv; |
| 1194 | return hdlc_ioctl(dev, ifr, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | |
Alan Cox | 2395f0e | 2009-10-14 05:22:24 +0000 | [diff] [blame] | 1197 | static long cosa_chardev_ioctl(struct file *file, unsigned int cmd, |
| 1198 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | { |
| 1200 | struct channel_data *channel = file->private_data; |
Alan Cox | 2395f0e | 2009-10-14 05:22:24 +0000 | [diff] [blame] | 1201 | struct cosa_data *cosa; |
| 1202 | long ret; |
| 1203 | |
Arnd Bergmann | 15fd0cd | 2010-07-11 11:18:57 +0000 | [diff] [blame] | 1204 | mutex_lock(&cosa_chardev_mutex); |
Alan Cox | 2395f0e | 2009-10-14 05:22:24 +0000 | [diff] [blame] | 1205 | cosa = channel->cosa; |
| 1206 | ret = cosa_ioctl_common(cosa, channel, cmd, arg); |
Arnd Bergmann | 15fd0cd | 2010-07-11 11:18:57 +0000 | [diff] [blame] | 1207 | mutex_unlock(&cosa_chardev_mutex); |
Alan Cox | 2395f0e | 2009-10-14 05:22:24 +0000 | [diff] [blame] | 1208 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | |
| 1211 | |
| 1212 | /*---------- HW layer interface ---------- */ |
| 1213 | |
| 1214 | /* |
| 1215 | * The higher layer can bind itself to the HW layer by setting the callbacks |
| 1216 | * in the channel_data structure and by using these routines. |
| 1217 | */ |
| 1218 | static void cosa_enable_rx(struct channel_data *chan) |
| 1219 | { |
| 1220 | struct cosa_data *cosa = chan->cosa; |
| 1221 | |
| 1222 | if (!test_and_set_bit(chan->num, &cosa->rxbitmap)) |
| 1223 | put_driver_status(cosa); |
| 1224 | } |
| 1225 | |
| 1226 | static void cosa_disable_rx(struct channel_data *chan) |
| 1227 | { |
| 1228 | struct cosa_data *cosa = chan->cosa; |
| 1229 | |
| 1230 | if (test_and_clear_bit(chan->num, &cosa->rxbitmap)) |
| 1231 | put_driver_status(cosa); |
| 1232 | } |
| 1233 | |
| 1234 | /* |
| 1235 | * FIXME: This routine probably should check for cosa_start_tx() called when |
| 1236 | * the previous transmit is still unfinished. In this case the non-zero |
| 1237 | * return value should indicate to the caller that the queuing(sp?) up |
| 1238 | * the transmit has failed. |
| 1239 | */ |
| 1240 | static int cosa_start_tx(struct channel_data *chan, char *buf, int len) |
| 1241 | { |
| 1242 | struct cosa_data *cosa = chan->cosa; |
| 1243 | unsigned long flags; |
| 1244 | #ifdef DEBUG_DATA |
| 1245 | int i; |
| 1246 | |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1247 | pr_info("cosa%dc%d: starting tx(0x%x)", |
| 1248 | chan->cosa->num, chan->num, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | for (i=0; i<len; i++) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1250 | pr_cont(" %02x", buf[i]&0xff); |
| 1251 | pr_cont("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | #endif |
| 1253 | spin_lock_irqsave(&cosa->lock, flags); |
| 1254 | chan->txbuf = buf; |
| 1255 | chan->txsize = len; |
| 1256 | if (len > COSA_MTU) |
| 1257 | chan->txsize = COSA_MTU; |
| 1258 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1259 | |
| 1260 | /* Tell the firmware we are ready */ |
| 1261 | set_bit(chan->num, &cosa->txbitmap); |
| 1262 | put_driver_status(cosa); |
| 1263 | |
| 1264 | return 0; |
| 1265 | } |
| 1266 | |
| 1267 | static void put_driver_status(struct cosa_data *cosa) |
| 1268 | { |
| 1269 | unsigned long flags; |
| 1270 | int status; |
| 1271 | |
| 1272 | spin_lock_irqsave(&cosa->lock, flags); |
| 1273 | |
| 1274 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) |
| 1275 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) |
| 1276 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) |
| 1277 | &DRIVER_TXMAP_MASK : 0); |
| 1278 | if (!cosa->rxtx) { |
| 1279 | if (cosa->rxbitmap|cosa->txbitmap) { |
| 1280 | if (!cosa->enabled) { |
| 1281 | cosa_putstatus(cosa, SR_RX_INT_ENA); |
| 1282 | #ifdef DEBUG_IO |
| 1283 | debug_status_out(cosa, SR_RX_INT_ENA); |
| 1284 | #endif |
| 1285 | cosa->enabled = 1; |
| 1286 | } |
| 1287 | } else if (cosa->enabled) { |
| 1288 | cosa->enabled = 0; |
| 1289 | cosa_putstatus(cosa, 0); |
| 1290 | #ifdef DEBUG_IO |
| 1291 | debug_status_out(cosa, 0); |
| 1292 | #endif |
| 1293 | } |
| 1294 | cosa_putdata8(cosa, status); |
| 1295 | #ifdef DEBUG_IO |
| 1296 | debug_data_cmd(cosa, status); |
| 1297 | #endif |
| 1298 | } |
| 1299 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1300 | } |
| 1301 | |
| 1302 | static void put_driver_status_nolock(struct cosa_data *cosa) |
| 1303 | { |
| 1304 | int status; |
| 1305 | |
| 1306 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) |
| 1307 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) |
| 1308 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) |
| 1309 | &DRIVER_TXMAP_MASK : 0); |
| 1310 | |
| 1311 | if (cosa->rxbitmap|cosa->txbitmap) { |
| 1312 | cosa_putstatus(cosa, SR_RX_INT_ENA); |
| 1313 | #ifdef DEBUG_IO |
| 1314 | debug_status_out(cosa, SR_RX_INT_ENA); |
| 1315 | #endif |
| 1316 | cosa->enabled = 1; |
| 1317 | } else { |
| 1318 | cosa_putstatus(cosa, 0); |
| 1319 | #ifdef DEBUG_IO |
| 1320 | debug_status_out(cosa, 0); |
| 1321 | #endif |
| 1322 | cosa->enabled = 0; |
| 1323 | } |
| 1324 | cosa_putdata8(cosa, status); |
| 1325 | #ifdef DEBUG_IO |
| 1326 | debug_data_cmd(cosa, status); |
| 1327 | #endif |
| 1328 | } |
| 1329 | |
| 1330 | /* |
| 1331 | * The "kickme" function: When the DMA times out, this is called to |
| 1332 | * clean up the driver status. |
| 1333 | * FIXME: Preliminary support, the interface is probably wrong. |
| 1334 | */ |
| 1335 | static void cosa_kick(struct cosa_data *cosa) |
| 1336 | { |
| 1337 | unsigned long flags, flags1; |
| 1338 | char *s = "(probably) IRQ"; |
| 1339 | |
| 1340 | if (test_bit(RXBIT, &cosa->rxtx)) |
| 1341 | s = "RX DMA"; |
| 1342 | if (test_bit(TXBIT, &cosa->rxtx)) |
| 1343 | s = "TX DMA"; |
| 1344 | |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1345 | pr_info("%s: %s timeout - restarting\n", cosa->name, s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | spin_lock_irqsave(&cosa->lock, flags); |
| 1347 | cosa->rxtx = 0; |
| 1348 | |
| 1349 | flags1 = claim_dma_lock(); |
| 1350 | disable_dma(cosa->dma); |
| 1351 | clear_dma_ff(cosa->dma); |
| 1352 | release_dma_lock(flags1); |
| 1353 | |
| 1354 | /* FIXME: Anything else? */ |
| 1355 | udelay(100); |
| 1356 | cosa_putstatus(cosa, 0); |
| 1357 | udelay(100); |
| 1358 | (void) cosa_getdata8(cosa); |
| 1359 | udelay(100); |
| 1360 | cosa_putdata8(cosa, 0); |
| 1361 | udelay(100); |
| 1362 | put_driver_status_nolock(cosa); |
| 1363 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1364 | } |
| 1365 | |
| 1366 | /* |
| 1367 | * Check if the whole buffer is DMA-able. It means it is below the 16M of |
| 1368 | * physical memory and doesn't span the 64k boundary. For now it seems |
| 1369 | * SKB's never do this, but we'll check this anyway. |
| 1370 | */ |
| 1371 | static int cosa_dma_able(struct channel_data *chan, char *buf, int len) |
| 1372 | { |
| 1373 | static int count; |
| 1374 | unsigned long b = (unsigned long)buf; |
| 1375 | if (b+len >= MAX_DMA_ADDRESS) |
| 1376 | return 0; |
| 1377 | if ((b^ (b+len)) & 0x10000) { |
| 1378 | if (count++ < 5) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1379 | pr_info("%s: packet spanning a 64k boundary\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | chan->name); |
| 1381 | return 0; |
| 1382 | } |
| 1383 | return 1; |
| 1384 | } |
| 1385 | |
| 1386 | |
| 1387 | /* ---------- The SRP/COSA ROM monitor functions ---------- */ |
| 1388 | |
| 1389 | /* |
| 1390 | * Downloading SRP microcode: say "w" to SRP monitor, it answers by "w=", |
| 1391 | * drivers need to say 4-digit hex number meaning start address of the microcode |
| 1392 | * separated by a single space. Monitor replies by saying " =". Now driver |
| 1393 | * has to write 4-digit hex number meaning the last byte address ended |
| 1394 | * by a single space. Monitor has to reply with a space. Now the download |
| 1395 | * begins. After the download monitor replies with "\r\n." (CR LF dot). |
| 1396 | */ |
| 1397 | static int download(struct cosa_data *cosa, const char __user *microcode, int length, int address) |
| 1398 | { |
| 1399 | int i; |
| 1400 | |
| 1401 | if (put_wait_data(cosa, 'w') == -1) return -1; |
| 1402 | if ((i=get_wait_data(cosa)) != 'w') { printk("dnld: 0x%04x\n",i); return -2;} |
| 1403 | if (get_wait_data(cosa) != '=') return -3; |
| 1404 | |
| 1405 | if (puthexnumber(cosa, address) < 0) return -4; |
| 1406 | if (put_wait_data(cosa, ' ') == -1) return -10; |
| 1407 | if (get_wait_data(cosa) != ' ') return -11; |
| 1408 | if (get_wait_data(cosa) != '=') return -12; |
| 1409 | |
| 1410 | if (puthexnumber(cosa, address+length-1) < 0) return -13; |
| 1411 | if (put_wait_data(cosa, ' ') == -1) return -18; |
| 1412 | if (get_wait_data(cosa) != ' ') return -19; |
| 1413 | |
| 1414 | while (length--) { |
| 1415 | char c; |
| 1416 | #ifndef SRP_DOWNLOAD_AT_BOOT |
| 1417 | if (get_user(c, microcode)) |
| 1418 | return -23; /* ??? */ |
| 1419 | #else |
| 1420 | c = *microcode; |
| 1421 | #endif |
| 1422 | if (put_wait_data(cosa, c) == -1) |
| 1423 | return -20; |
| 1424 | microcode++; |
| 1425 | } |
| 1426 | |
| 1427 | if (get_wait_data(cosa) != '\r') return -21; |
| 1428 | if (get_wait_data(cosa) != '\n') return -22; |
| 1429 | if (get_wait_data(cosa) != '.') return -23; |
| 1430 | #if 0 |
| 1431 | printk(KERN_DEBUG "cosa%d: download completed.\n", cosa->num); |
| 1432 | #endif |
| 1433 | return 0; |
| 1434 | } |
| 1435 | |
| 1436 | |
| 1437 | /* |
| 1438 | * Starting microcode is done via the "g" command of the SRP monitor. |
| 1439 | * The chat should be the following: "g" "g=" "<addr><CR>" |
| 1440 | * "<CR><CR><LF><CR><LF>". |
| 1441 | */ |
| 1442 | static int startmicrocode(struct cosa_data *cosa, int address) |
| 1443 | { |
| 1444 | if (put_wait_data(cosa, 'g') == -1) return -1; |
| 1445 | if (get_wait_data(cosa) != 'g') return -2; |
| 1446 | if (get_wait_data(cosa) != '=') return -3; |
| 1447 | |
| 1448 | if (puthexnumber(cosa, address) < 0) return -4; |
| 1449 | if (put_wait_data(cosa, '\r') == -1) return -5; |
| 1450 | |
| 1451 | if (get_wait_data(cosa) != '\r') return -6; |
| 1452 | if (get_wait_data(cosa) != '\r') return -7; |
| 1453 | if (get_wait_data(cosa) != '\n') return -8; |
| 1454 | if (get_wait_data(cosa) != '\r') return -9; |
| 1455 | if (get_wait_data(cosa) != '\n') return -10; |
| 1456 | #if 0 |
| 1457 | printk(KERN_DEBUG "cosa%d: microcode started\n", cosa->num); |
| 1458 | #endif |
| 1459 | return 0; |
| 1460 | } |
| 1461 | |
| 1462 | /* |
| 1463 | * Reading memory is done via the "r" command of the SRP monitor. |
| 1464 | * The chat is the following "r" "r=" "<addr> " " =" "<last_byte> " " " |
| 1465 | * Then driver can read the data and the conversation is finished |
| 1466 | * by SRP monitor sending "<CR><LF>." (dot at the end). |
| 1467 | * |
| 1468 | * This routine is not needed during the normal operation and serves |
| 1469 | * for debugging purposes only. |
| 1470 | */ |
| 1471 | static int readmem(struct cosa_data *cosa, char __user *microcode, int length, int address) |
| 1472 | { |
| 1473 | if (put_wait_data(cosa, 'r') == -1) return -1; |
| 1474 | if ((get_wait_data(cosa)) != 'r') return -2; |
| 1475 | if ((get_wait_data(cosa)) != '=') return -3; |
| 1476 | |
| 1477 | if (puthexnumber(cosa, address) < 0) return -4; |
| 1478 | if (put_wait_data(cosa, ' ') == -1) return -5; |
| 1479 | if (get_wait_data(cosa) != ' ') return -6; |
| 1480 | if (get_wait_data(cosa) != '=') return -7; |
| 1481 | |
| 1482 | if (puthexnumber(cosa, address+length-1) < 0) return -8; |
| 1483 | if (put_wait_data(cosa, ' ') == -1) return -9; |
| 1484 | if (get_wait_data(cosa) != ' ') return -10; |
| 1485 | |
| 1486 | while (length--) { |
| 1487 | char c; |
| 1488 | int i; |
| 1489 | if ((i=get_wait_data(cosa)) == -1) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1490 | pr_info("0x%04x bytes remaining\n", length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | return -11; |
| 1492 | } |
| 1493 | c=i; |
| 1494 | #if 1 |
| 1495 | if (put_user(c, microcode)) |
| 1496 | return -23; /* ??? */ |
| 1497 | #else |
| 1498 | *microcode = c; |
| 1499 | #endif |
| 1500 | microcode++; |
| 1501 | } |
| 1502 | |
| 1503 | if (get_wait_data(cosa) != '\r') return -21; |
| 1504 | if (get_wait_data(cosa) != '\n') return -22; |
| 1505 | if (get_wait_data(cosa) != '.') return -23; |
| 1506 | #if 0 |
| 1507 | printk(KERN_DEBUG "cosa%d: readmem completed.\n", cosa->num); |
| 1508 | #endif |
| 1509 | return 0; |
| 1510 | } |
| 1511 | |
| 1512 | /* |
| 1513 | * This function resets the device and reads the initial prompt |
| 1514 | * of the device's ROM monitor. |
| 1515 | */ |
| 1516 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *idstring) |
| 1517 | { |
| 1518 | int i=0, id=0, prev=0, curr=0; |
| 1519 | |
| 1520 | /* Reset the card ... */ |
| 1521 | cosa_putstatus(cosa, 0); |
| 1522 | cosa_getdata8(cosa); |
| 1523 | cosa_putstatus(cosa, SR_RST); |
| 1524 | #ifdef MODULE |
| 1525 | msleep(500); |
| 1526 | #else |
| 1527 | udelay(5*100000); |
| 1528 | #endif |
| 1529 | /* Disable all IRQs from the card */ |
| 1530 | cosa_putstatus(cosa, 0); |
| 1531 | |
| 1532 | /* |
| 1533 | * Try to read the ID string. The card then prints out the |
| 1534 | * identification string ended by the "\n\x2e". |
| 1535 | * |
| 1536 | * The following loop is indexed through i (instead of id) |
| 1537 | * to avoid looping forever when for any reason |
| 1538 | * the port returns '\r', '\n' or '\x2e' permanently. |
| 1539 | */ |
| 1540 | for (i=0; i<COSA_MAX_ID_STRING-1; i++, prev=curr) { |
| 1541 | if ((curr = get_wait_data(cosa)) == -1) { |
| 1542 | return -1; |
| 1543 | } |
| 1544 | curr &= 0xff; |
| 1545 | if (curr != '\r' && curr != '\n' && curr != 0x2e) |
| 1546 | idstring[id++] = curr; |
| 1547 | if (curr == 0x2e && prev == '\n') |
| 1548 | break; |
| 1549 | } |
| 1550 | /* Perhaps we should fail when i==COSA_MAX_ID_STRING-1 ? */ |
| 1551 | idstring[id] = '\0'; |
| 1552 | return id; |
| 1553 | } |
| 1554 | |
| 1555 | |
| 1556 | /* ---------- Auxiliary routines for COSA/SRP monitor ---------- */ |
| 1557 | |
| 1558 | /* |
| 1559 | * This routine gets the data byte from the card waiting for the SR_RX_RDY |
| 1560 | * bit to be set in a loop. It should be used in the exceptional cases |
| 1561 | * only (for example when resetting the card or downloading the firmware. |
| 1562 | */ |
| 1563 | static int get_wait_data(struct cosa_data *cosa) |
| 1564 | { |
| 1565 | int retries = 1000; |
| 1566 | |
| 1567 | while (--retries) { |
| 1568 | /* read data and return them */ |
| 1569 | if (cosa_getstatus(cosa) & SR_RX_RDY) { |
| 1570 | short r; |
| 1571 | r = cosa_getdata8(cosa); |
| 1572 | #if 0 |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1573 | pr_info("get_wait_data returning after %d retries\n", |
| 1574 | 999-retries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | #endif |
| 1576 | return r; |
| 1577 | } |
| 1578 | /* sleep if not ready to read */ |
Nishanth Aravamudan | 3173c89 | 2005-09-11 02:09:55 -0700 | [diff] [blame] | 1579 | schedule_timeout_interruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1581 | pr_info("timeout in get_wait_data (status 0x%x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | cosa_getstatus(cosa)); |
| 1583 | return -1; |
| 1584 | } |
| 1585 | |
| 1586 | /* |
| 1587 | * This routine puts the data byte to the card waiting for the SR_TX_RDY |
| 1588 | * bit to be set in a loop. It should be used in the exceptional cases |
| 1589 | * only (for example when resetting the card or downloading the firmware). |
| 1590 | */ |
| 1591 | static int put_wait_data(struct cosa_data *cosa, int data) |
| 1592 | { |
| 1593 | int retries = 1000; |
| 1594 | while (--retries) { |
| 1595 | /* read data and return them */ |
| 1596 | if (cosa_getstatus(cosa) & SR_TX_RDY) { |
| 1597 | cosa_putdata8(cosa, data); |
| 1598 | #if 0 |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1599 | pr_info("Putdata: %d retries\n", 999-retries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | #endif |
| 1601 | return 0; |
| 1602 | } |
| 1603 | #if 0 |
| 1604 | /* sleep if not ready to read */ |
Nishanth Aravamudan | 3173c89 | 2005-09-11 02:09:55 -0700 | [diff] [blame] | 1605 | schedule_timeout_interruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | #endif |
| 1607 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1608 | pr_info("cosa%d: timeout in put_wait_data (status 0x%x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | cosa->num, cosa_getstatus(cosa)); |
| 1610 | return -1; |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * The following routine puts the hexadecimal number into the SRP monitor |
| 1615 | * and verifies the proper echo of the sent bytes. Returns 0 on success, |
| 1616 | * negative number on failure (-1,-3,-5,-7) means that put_wait_data() failed, |
| 1617 | * (-2,-4,-6,-8) means that reading echo failed. |
| 1618 | */ |
| 1619 | static int puthexnumber(struct cosa_data *cosa, int number) |
| 1620 | { |
| 1621 | char temp[5]; |
| 1622 | int i; |
| 1623 | |
| 1624 | /* Well, I should probably replace this by something faster. */ |
| 1625 | sprintf(temp, "%04X", number); |
| 1626 | for (i=0; i<4; i++) { |
| 1627 | if (put_wait_data(cosa, temp[i]) == -1) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1628 | pr_notice("cosa%d: puthexnumber failed to write byte %d\n", |
| 1629 | cosa->num, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | return -1-2*i; |
| 1631 | } |
| 1632 | if (get_wait_data(cosa) != temp[i]) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1633 | pr_notice("cosa%d: puthexhumber failed to read echo of byte %d\n", |
| 1634 | cosa->num, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | return -2-2*i; |
| 1636 | } |
| 1637 | } |
| 1638 | return 0; |
| 1639 | } |
| 1640 | |
| 1641 | |
| 1642 | /* ---------- Interrupt routines ---------- */ |
| 1643 | |
| 1644 | /* |
| 1645 | * There are three types of interrupt: |
| 1646 | * At the beginning of transmit - this handled is in tx_interrupt(), |
| 1647 | * at the beginning of receive - it is in rx_interrupt() and |
| 1648 | * at the end of transmit/receive - it is the eot_interrupt() function. |
| 1649 | * These functions are multiplexed by cosa_interrupt() according to the |
| 1650 | * COSA status byte. I have moved the rx/tx/eot interrupt handling into |
| 1651 | * separate functions to make it more readable. These functions are inline, |
| 1652 | * so there should be no overhead of function call. |
| 1653 | * |
| 1654 | * In the COSA bus-master mode, we need to tell the card the address of a |
| 1655 | * buffer. Unfortunately, COSA may be too slow for us, so we must busy-wait. |
| 1656 | * It's time to use the bottom half :-( |
| 1657 | */ |
| 1658 | |
| 1659 | /* |
| 1660 | * Transmit interrupt routine - called when COSA is willing to obtain |
| 1661 | * data from the OS. The most tricky part of the routine is selection |
| 1662 | * of channel we (OS) want to send packet for. For SRP we should probably |
| 1663 | * use the round-robin approach. The newer COSA firmwares have a simple |
| 1664 | * flow-control - in the status word has bits 2 and 3 set to 1 means that the |
| 1665 | * channel 0 or 1 doesn't want to receive data. |
| 1666 | * |
| 1667 | * It seems there is a bug in COSA firmware (need to trace it further): |
| 1668 | * When the driver status says that the kernel has no more data for transmit |
| 1669 | * (e.g. at the end of TX DMA) and then the kernel changes its mind |
| 1670 | * (e.g. new packet is queued to hard_start_xmit()), the card issues |
| 1671 | * the TX interrupt but does not mark the channel as ready-to-transmit. |
| 1672 | * The fix seems to be to push the packet to COSA despite its request. |
| 1673 | * We first try to obey the card's opinion, and then fall back to forced TX. |
| 1674 | */ |
| 1675 | static inline void tx_interrupt(struct cosa_data *cosa, int status) |
| 1676 | { |
| 1677 | unsigned long flags, flags1; |
| 1678 | #ifdef DEBUG_IRQS |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1679 | pr_info("cosa%d: SR_DOWN_REQUEST status=0x%04x\n", cosa->num, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | #endif |
| 1681 | spin_lock_irqsave(&cosa->lock, flags); |
| 1682 | set_bit(TXBIT, &cosa->rxtx); |
| 1683 | if (!test_bit(IRQBIT, &cosa->rxtx)) { |
| 1684 | /* flow control, see the comment above */ |
| 1685 | int i=0; |
| 1686 | if (!cosa->txbitmap) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1687 | pr_warn("%s: No channel wants data in TX IRQ. Expect DMA timeout.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | cosa->name); |
| 1689 | put_driver_status_nolock(cosa); |
| 1690 | clear_bit(TXBIT, &cosa->rxtx); |
| 1691 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1692 | return; |
| 1693 | } |
Rudy Matela | 640462c | 2009-12-09 11:35:40 -0300 | [diff] [blame] | 1694 | while (1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | cosa->txchan++; |
| 1696 | i++; |
| 1697 | if (cosa->txchan >= cosa->nchannels) |
| 1698 | cosa->txchan = 0; |
| 1699 | if (!(cosa->txbitmap & (1<<cosa->txchan))) |
| 1700 | continue; |
| 1701 | if (~status & (1 << (cosa->txchan+DRIVER_TXMAP_SHIFT))) |
| 1702 | break; |
| 1703 | /* in second pass, accept first ready-to-TX channel */ |
| 1704 | if (i > cosa->nchannels) { |
| 1705 | /* Can be safely ignored */ |
| 1706 | #ifdef DEBUG_IRQS |
| 1707 | printk(KERN_DEBUG "%s: Forcing TX " |
| 1708 | "to not-ready channel %d\n", |
| 1709 | cosa->name, cosa->txchan); |
| 1710 | #endif |
| 1711 | break; |
| 1712 | } |
| 1713 | } |
| 1714 | |
| 1715 | cosa->txsize = cosa->chan[cosa->txchan].txsize; |
| 1716 | if (cosa_dma_able(cosa->chan+cosa->txchan, |
| 1717 | cosa->chan[cosa->txchan].txbuf, cosa->txsize)) { |
| 1718 | cosa->txbuf = cosa->chan[cosa->txchan].txbuf; |
| 1719 | } else { |
| 1720 | memcpy(cosa->bouncebuf, cosa->chan[cosa->txchan].txbuf, |
| 1721 | cosa->txsize); |
| 1722 | cosa->txbuf = cosa->bouncebuf; |
| 1723 | } |
| 1724 | } |
| 1725 | |
| 1726 | if (is_8bit(cosa)) { |
| 1727 | if (!test_bit(IRQBIT, &cosa->rxtx)) { |
| 1728 | cosa_putstatus(cosa, SR_TX_INT_ENA); |
| 1729 | cosa_putdata8(cosa, ((cosa->txchan << 5) & 0xe0)| |
| 1730 | ((cosa->txsize >> 8) & 0x1f)); |
| 1731 | #ifdef DEBUG_IO |
| 1732 | debug_status_out(cosa, SR_TX_INT_ENA); |
| 1733 | debug_data_out(cosa, ((cosa->txchan << 5) & 0xe0)| |
| 1734 | ((cosa->txsize >> 8) & 0x1f)); |
| 1735 | debug_data_in(cosa, cosa_getdata8(cosa)); |
| 1736 | #else |
| 1737 | cosa_getdata8(cosa); |
| 1738 | #endif |
| 1739 | set_bit(IRQBIT, &cosa->rxtx); |
| 1740 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1741 | return; |
| 1742 | } else { |
| 1743 | clear_bit(IRQBIT, &cosa->rxtx); |
| 1744 | cosa_putstatus(cosa, 0); |
| 1745 | cosa_putdata8(cosa, cosa->txsize&0xff); |
| 1746 | #ifdef DEBUG_IO |
| 1747 | debug_status_out(cosa, 0); |
| 1748 | debug_data_out(cosa, cosa->txsize&0xff); |
| 1749 | #endif |
| 1750 | } |
| 1751 | } else { |
| 1752 | cosa_putstatus(cosa, SR_TX_INT_ENA); |
| 1753 | cosa_putdata16(cosa, ((cosa->txchan<<13) & 0xe000) |
| 1754 | | (cosa->txsize & 0x1fff)); |
| 1755 | #ifdef DEBUG_IO |
| 1756 | debug_status_out(cosa, SR_TX_INT_ENA); |
| 1757 | debug_data_out(cosa, ((cosa->txchan<<13) & 0xe000) |
| 1758 | | (cosa->txsize & 0x1fff)); |
| 1759 | debug_data_in(cosa, cosa_getdata8(cosa)); |
| 1760 | debug_status_out(cosa, 0); |
| 1761 | #else |
| 1762 | cosa_getdata8(cosa); |
| 1763 | #endif |
| 1764 | cosa_putstatus(cosa, 0); |
| 1765 | } |
| 1766 | |
| 1767 | if (cosa->busmaster) { |
| 1768 | unsigned long addr = virt_to_bus(cosa->txbuf); |
| 1769 | int count=0; |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1770 | pr_info("busmaster IRQ\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { |
| 1772 | count++; |
| 1773 | udelay(10); |
| 1774 | if (count > 1000) break; |
| 1775 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1776 | pr_info("status %x\n", cosa_getstatus(cosa)); |
| 1777 | pr_info("ready after %d loops\n", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | cosa_putdata16(cosa, (addr >> 16)&0xffff); |
| 1779 | |
| 1780 | count = 0; |
| 1781 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { |
| 1782 | count++; |
| 1783 | if (count > 1000) break; |
| 1784 | udelay(10); |
| 1785 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1786 | pr_info("ready after %d loops\n", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | cosa_putdata16(cosa, addr &0xffff); |
| 1788 | flags1 = claim_dma_lock(); |
| 1789 | set_dma_mode(cosa->dma, DMA_MODE_CASCADE); |
| 1790 | enable_dma(cosa->dma); |
| 1791 | release_dma_lock(flags1); |
| 1792 | } else { |
| 1793 | /* start the DMA */ |
| 1794 | flags1 = claim_dma_lock(); |
| 1795 | disable_dma(cosa->dma); |
| 1796 | clear_dma_ff(cosa->dma); |
| 1797 | set_dma_mode(cosa->dma, DMA_MODE_WRITE); |
| 1798 | set_dma_addr(cosa->dma, virt_to_bus(cosa->txbuf)); |
| 1799 | set_dma_count(cosa->dma, cosa->txsize); |
| 1800 | enable_dma(cosa->dma); |
| 1801 | release_dma_lock(flags1); |
| 1802 | } |
| 1803 | cosa_putstatus(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); |
| 1804 | #ifdef DEBUG_IO |
| 1805 | debug_status_out(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); |
| 1806 | #endif |
| 1807 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1808 | } |
| 1809 | |
| 1810 | static inline void rx_interrupt(struct cosa_data *cosa, int status) |
| 1811 | { |
| 1812 | unsigned long flags; |
| 1813 | #ifdef DEBUG_IRQS |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1814 | pr_info("cosa%d: SR_UP_REQUEST\n", cosa->num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | #endif |
| 1816 | |
| 1817 | spin_lock_irqsave(&cosa->lock, flags); |
| 1818 | set_bit(RXBIT, &cosa->rxtx); |
| 1819 | |
| 1820 | if (is_8bit(cosa)) { |
| 1821 | if (!test_bit(IRQBIT, &cosa->rxtx)) { |
| 1822 | set_bit(IRQBIT, &cosa->rxtx); |
| 1823 | put_driver_status_nolock(cosa); |
| 1824 | cosa->rxsize = cosa_getdata8(cosa) <<8; |
| 1825 | #ifdef DEBUG_IO |
| 1826 | debug_data_in(cosa, cosa->rxsize >> 8); |
| 1827 | #endif |
| 1828 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1829 | return; |
| 1830 | } else { |
| 1831 | clear_bit(IRQBIT, &cosa->rxtx); |
| 1832 | cosa->rxsize |= cosa_getdata8(cosa) & 0xff; |
| 1833 | #ifdef DEBUG_IO |
| 1834 | debug_data_in(cosa, cosa->rxsize & 0xff); |
| 1835 | #endif |
| 1836 | #if 0 |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1837 | pr_info("cosa%d: receive rxsize = (0x%04x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | cosa->num, cosa->rxsize); |
| 1839 | #endif |
| 1840 | } |
| 1841 | } else { |
| 1842 | cosa->rxsize = cosa_getdata16(cosa); |
| 1843 | #ifdef DEBUG_IO |
| 1844 | debug_data_in(cosa, cosa->rxsize); |
| 1845 | #endif |
| 1846 | #if 0 |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1847 | pr_info("cosa%d: receive rxsize = (0x%04x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | cosa->num, cosa->rxsize); |
| 1849 | #endif |
| 1850 | } |
| 1851 | if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1852 | pr_warn("%s: rx for unknown channel (0x%04x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | cosa->name, cosa->rxsize); |
| 1854 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1855 | goto reject; |
| 1856 | } |
| 1857 | cosa->rxchan = cosa->chan + ((cosa->rxsize & 0xe000) >> 13); |
| 1858 | cosa->rxsize &= 0x1fff; |
| 1859 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1860 | |
| 1861 | cosa->rxbuf = NULL; |
| 1862 | if (cosa->rxchan->setup_rx) |
| 1863 | cosa->rxbuf = cosa->rxchan->setup_rx(cosa->rxchan, cosa->rxsize); |
| 1864 | |
| 1865 | if (!cosa->rxbuf) { |
| 1866 | reject: /* Reject the packet */ |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1867 | pr_info("cosa%d: rejecting packet on channel %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | cosa->num, cosa->rxchan->num); |
| 1869 | cosa->rxbuf = cosa->bouncebuf; |
| 1870 | } |
| 1871 | |
| 1872 | /* start the DMA */ |
| 1873 | flags = claim_dma_lock(); |
| 1874 | disable_dma(cosa->dma); |
| 1875 | clear_dma_ff(cosa->dma); |
| 1876 | set_dma_mode(cosa->dma, DMA_MODE_READ); |
| 1877 | if (cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize & 0x1fff)) { |
| 1878 | set_dma_addr(cosa->dma, virt_to_bus(cosa->rxbuf)); |
| 1879 | } else { |
| 1880 | set_dma_addr(cosa->dma, virt_to_bus(cosa->bouncebuf)); |
| 1881 | } |
| 1882 | set_dma_count(cosa->dma, (cosa->rxsize&0x1fff)); |
| 1883 | enable_dma(cosa->dma); |
| 1884 | release_dma_lock(flags); |
| 1885 | spin_lock_irqsave(&cosa->lock, flags); |
| 1886 | cosa_putstatus(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); |
| 1887 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) |
| 1888 | cosa_putdata8(cosa, DRIVER_RX_READY); |
| 1889 | #ifdef DEBUG_IO |
| 1890 | debug_status_out(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); |
| 1891 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) |
| 1892 | debug_data_cmd(cosa, DRIVER_RX_READY); |
| 1893 | #endif |
| 1894 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1895 | } |
| 1896 | |
| 1897 | static inline void eot_interrupt(struct cosa_data *cosa, int status) |
| 1898 | { |
| 1899 | unsigned long flags, flags1; |
| 1900 | spin_lock_irqsave(&cosa->lock, flags); |
| 1901 | flags1 = claim_dma_lock(); |
| 1902 | disable_dma(cosa->dma); |
| 1903 | clear_dma_ff(cosa->dma); |
| 1904 | release_dma_lock(flags1); |
| 1905 | if (test_bit(TXBIT, &cosa->rxtx)) { |
| 1906 | struct channel_data *chan = cosa->chan+cosa->txchan; |
| 1907 | if (chan->tx_done) |
| 1908 | if (chan->tx_done(chan, cosa->txsize)) |
| 1909 | clear_bit(chan->num, &cosa->txbitmap); |
| 1910 | } else if (test_bit(RXBIT, &cosa->rxtx)) { |
| 1911 | #ifdef DEBUG_DATA |
| 1912 | { |
| 1913 | int i; |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1914 | pr_info("cosa%dc%d: done rx(0x%x)", |
| 1915 | cosa->num, cosa->rxchan->num, cosa->rxsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | for (i=0; i<cosa->rxsize; i++) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1917 | pr_cont(" %02x", cosa->rxbuf[i]&0xff); |
| 1918 | pr_cont("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | } |
| 1920 | #endif |
| 1921 | /* Packet for unknown channel? */ |
| 1922 | if (cosa->rxbuf == cosa->bouncebuf) |
| 1923 | goto out; |
| 1924 | if (!cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize)) |
| 1925 | memcpy(cosa->rxbuf, cosa->bouncebuf, cosa->rxsize); |
| 1926 | if (cosa->rxchan->rx_done) |
| 1927 | if (cosa->rxchan->rx_done(cosa->rxchan)) |
| 1928 | clear_bit(cosa->rxchan->num, &cosa->rxbitmap); |
| 1929 | } else { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1930 | pr_notice("cosa%d: unexpected EOT interrupt\n", cosa->num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | } |
| 1932 | /* |
| 1933 | * Clear the RXBIT, TXBIT and IRQBIT (the latest should be |
| 1934 | * cleared anyway). We should do it as soon as possible |
| 1935 | * so that we can tell the COSA we are done and to give it a time |
| 1936 | * for recovery. |
| 1937 | */ |
| 1938 | out: |
| 1939 | cosa->rxtx = 0; |
| 1940 | put_driver_status_nolock(cosa); |
| 1941 | spin_unlock_irqrestore(&cosa->lock, flags); |
| 1942 | } |
| 1943 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1944 | static irqreturn_t cosa_interrupt(int irq, void *cosa_) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | { |
| 1946 | unsigned status; |
| 1947 | int count = 0; |
| 1948 | struct cosa_data *cosa = cosa_; |
| 1949 | again: |
| 1950 | status = cosa_getstatus(cosa); |
| 1951 | #ifdef DEBUG_IRQS |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1952 | pr_info("cosa%d: got IRQ, status 0x%02x\n", cosa->num, status & 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | #endif |
| 1954 | #ifdef DEBUG_IO |
| 1955 | debug_status_in(cosa, status); |
| 1956 | #endif |
| 1957 | switch (status & SR_CMD_FROM_SRP_MASK) { |
| 1958 | case SR_DOWN_REQUEST: |
| 1959 | tx_interrupt(cosa, status); |
| 1960 | break; |
| 1961 | case SR_UP_REQUEST: |
| 1962 | rx_interrupt(cosa, status); |
| 1963 | break; |
| 1964 | case SR_END_OF_TRANSFER: |
| 1965 | eot_interrupt(cosa, status); |
| 1966 | break; |
| 1967 | default: |
| 1968 | /* We may be too fast for SRP. Try to wait a bit more. */ |
| 1969 | if (count++ < 100) { |
| 1970 | udelay(100); |
| 1971 | goto again; |
| 1972 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1973 | pr_info("cosa%d: unknown status 0x%02x in IRQ after %d retries\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | cosa->num, status & 0xff, count); |
| 1975 | } |
| 1976 | #ifdef DEBUG_IRQS |
| 1977 | if (count) |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1978 | pr_info("%s: %d-times got unknown status in IRQ\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | cosa->name, count); |
| 1980 | else |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 1981 | pr_info("%s: returning from IRQ\n", cosa->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | #endif |
| 1983 | return IRQ_HANDLED; |
| 1984 | } |
| 1985 | |
| 1986 | |
| 1987 | /* ---------- I/O debugging routines ---------- */ |
| 1988 | /* |
| 1989 | * These routines can be used to monitor COSA/SRP I/O and to printk() |
| 1990 | * the data being transferred on the data and status I/O port in a |
| 1991 | * readable way. |
| 1992 | */ |
| 1993 | |
| 1994 | #ifdef DEBUG_IO |
| 1995 | static void debug_status_in(struct cosa_data *cosa, int status) |
| 1996 | { |
| 1997 | char *s; |
Rudy Matela | 640462c | 2009-12-09 11:35:40 -0300 | [diff] [blame] | 1998 | switch (status & SR_CMD_FROM_SRP_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | case SR_UP_REQUEST: |
| 2000 | s = "RX_REQ"; |
| 2001 | break; |
| 2002 | case SR_DOWN_REQUEST: |
| 2003 | s = "TX_REQ"; |
| 2004 | break; |
| 2005 | case SR_END_OF_TRANSFER: |
| 2006 | s = "ET_REQ"; |
| 2007 | break; |
| 2008 | default: |
| 2009 | s = "NO_REQ"; |
| 2010 | break; |
| 2011 | } |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2012 | pr_info("%s: IO: status -> 0x%02x (%s%s%s%s)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | cosa->name, |
| 2014 | status, |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2015 | status & SR_USR_RQ ? "USR_RQ|" : "", |
| 2016 | status & SR_TX_RDY ? "TX_RDY|" : "", |
| 2017 | status & SR_RX_RDY ? "RX_RDY|" : "", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | s); |
| 2019 | } |
| 2020 | |
| 2021 | static void debug_status_out(struct cosa_data *cosa, int status) |
| 2022 | { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2023 | pr_info("%s: IO: status <- 0x%02x (%s%s%s%s%s%s)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | cosa->name, |
| 2025 | status, |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2026 | status & SR_RX_DMA_ENA ? "RXDMA|" : "!rxdma|", |
| 2027 | status & SR_TX_DMA_ENA ? "TXDMA|" : "!txdma|", |
| 2028 | status & SR_RST ? "RESET|" : "", |
| 2029 | status & SR_USR_INT_ENA ? "USRINT|" : "!usrint|", |
| 2030 | status & SR_TX_INT_ENA ? "TXINT|" : "!txint|", |
| 2031 | status & SR_RX_INT_ENA ? "RXINT" : "!rxint"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | } |
| 2033 | |
| 2034 | static void debug_data_in(struct cosa_data *cosa, int data) |
| 2035 | { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2036 | pr_info("%s: IO: data -> 0x%04x\n", cosa->name, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | } |
| 2038 | |
| 2039 | static void debug_data_out(struct cosa_data *cosa, int data) |
| 2040 | { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2041 | pr_info("%s: IO: data <- 0x%04x\n", cosa->name, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | } |
| 2043 | |
| 2044 | static void debug_data_cmd(struct cosa_data *cosa, int data) |
| 2045 | { |
Joe Perches | 9cbe50d | 2011-06-26 19:01:29 +0000 | [diff] [blame] | 2046 | pr_info("%s: IO: data <- 0x%04x (%s|%s)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | cosa->name, data, |
| 2048 | data & SR_RDY_RCV ? "RX_RDY" : "!rx_rdy", |
| 2049 | data & SR_RDY_SND ? "TX_RDY" : "!tx_rdy"); |
| 2050 | } |
| 2051 | #endif |
| 2052 | |
| 2053 | /* EOF -- this file has not been truncated */ |