drivers/usb/atm/cxacru.c

   1 /******************************************************************************
   2  *  cxacru.c  -  driver for USB ADSL modems based on
   3  *               Conexant AccessRunner chipset
   4  *
   5  *  Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
   6  *  Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
   7  *  Copyright (C) 2007 Simon Arlott
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License as published by the Free
  11  *  Software Foundation; either version 2 of the License, or (at your option)
  12  *  any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful, but WITHOUT
  15  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  *  more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along with
  20  *  this program; if not, write to the Free Software Foundation, Inc., 59
  21  *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  ******************************************************************************/
  24
  25 /*
  26  *  Credit is due for Josep Comas, who created the original patch to speedtch.c
  27  *  to support the different padding used by the AccessRunner (now generalized
  28  *  into usbatm), and the userspace firmware loading utility.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/kernel.h>
  34 #include <linux/timer.h>
  35 #include <linux/errno.h>
  36 #include <linux/slab.h>
  37 #include <linux/init.h>
  38 #include <linux/device.h>
  39 #include <linux/firmware.h>
  40 #include <linux/mutex.h>
  41 #include <asm/unaligned.h>
  42
  43 #include "usbatm.h"
  44
  45 #define DRIVER_AUTHOR   "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
  46 #define DRIVER_VERSION  "0.3"
  47 #define DRIVER_DESC     "Conexant AccessRunner ADSL USB modem driver"
  48
  49 static const char cxacru_driver_name[] = "cxacru";
  50
  51 #define CXACRU_EP_CMD           0x01    /* Bulk/interrupt in/out */
  52 #define CXACRU_EP_DATA          0x02    /* Bulk in/out */
  53
  54 #define CMD_PACKET_SIZE         64      /* Should be maxpacket(ep)? */
  55
  56 /* Addresses */
  57 #define PLLFCLK_ADDR    0x00350068
  58 #define PLLBCLK_ADDR    0x0035006c
  59 #define SDRAMEN_ADDR    0x00350010
  60 #define FW_ADDR         0x00801000
  61 #define BR_ADDR         0x00180600
  62 #define SIG_ADDR        0x00180500
  63 #define BR_STACK_ADDR   0x00187f10
  64
  65 /* Values */
  66 #define SDRAM_ENA       0x1
  67
  68 #define CMD_TIMEOUT     2000    /* msecs */
  69 #define POLL_INTERVAL   1       /* secs */
  70
  71 /* commands for interaction with the modem through the control channel before
  72  * firmware is loaded  */
  73 enum cxacru_fw_request {
  74         FW_CMD_ERR,
  75         FW_GET_VER,
  76         FW_READ_MEM,
  77         FW_WRITE_MEM,
  78         FW_RMW_MEM,
  79         FW_CHECKSUM_MEM,
  80         FW_GOTO_MEM,
  81 };
  82
  83 /* commands for interaction with the modem through the control channel once
  84  * firmware is loaded  */
  85 enum cxacru_cm_request {
  86         CM_REQUEST_UNDEFINED = 0x80,
  87         CM_REQUEST_TEST,
  88         CM_REQUEST_CHIP_GET_MAC_ADDRESS,
  89         CM_REQUEST_CHIP_GET_DP_VERSIONS,
  90         CM_REQUEST_CHIP_ADSL_LINE_START,
  91         CM_REQUEST_CHIP_ADSL_LINE_STOP,
  92         CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
  93         CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
  94         CM_REQUEST_CARD_INFO_GET,
  95         CM_REQUEST_CARD_DATA_GET,
  96         CM_REQUEST_CARD_DATA_SET,
  97         CM_REQUEST_COMMAND_HW_IO,
  98         CM_REQUEST_INTERFACE_HW_IO,
  99         CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
 100         CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
 101         CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
 102         CM_REQUEST_CARD_GET_STATUS,
 103         CM_REQUEST_CARD_GET_MAC_ADDRESS,
 104         CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
 105         CM_REQUEST_MAX,
 106 };
 107
 108 /* reply codes to the commands above */
 109 enum cxacru_cm_status {
 110         CM_STATUS_UNDEFINED,
 111         CM_STATUS_SUCCESS,
 112         CM_STATUS_ERROR,
 113         CM_STATUS_UNSUPPORTED,
 114         CM_STATUS_UNIMPLEMENTED,
 115         CM_STATUS_PARAMETER_ERROR,
 116         CM_STATUS_DBG_LOOPBACK,
 117         CM_STATUS_MAX,
 118 };
 119
 120 /* indices into CARD_INFO_GET return array */
 121 enum cxacru_info_idx {
 122         CXINF_DOWNSTREAM_RATE,
 123         CXINF_UPSTREAM_RATE,
 124         CXINF_LINK_STATUS,
 125         CXINF_LINE_STATUS,
 126         CXINF_MAC_ADDRESS_HIGH,
 127         CXINF_MAC_ADDRESS_LOW,
 128         CXINF_UPSTREAM_SNR_MARGIN,
 129         CXINF_DOWNSTREAM_SNR_MARGIN,
 130         CXINF_UPSTREAM_ATTENUATION,
 131         CXINF_DOWNSTREAM_ATTENUATION,
 132         CXINF_TRANSMITTER_POWER,
 133         CXINF_UPSTREAM_BITS_PER_FRAME,
 134         CXINF_DOWNSTREAM_BITS_PER_FRAME,
 135         CXINF_STARTUP_ATTEMPTS,
 136         CXINF_UPSTREAM_CRC_ERRORS,
 137         CXINF_DOWNSTREAM_CRC_ERRORS,
 138         CXINF_UPSTREAM_FEC_ERRORS,
 139         CXINF_DOWNSTREAM_FEC_ERRORS,
 140         CXINF_UPSTREAM_HEC_ERRORS,
 141         CXINF_DOWNSTREAM_HEC_ERRORS,
 142         CXINF_LINE_STARTABLE,
 143         CXINF_MODULATION,
 144         CXINF_ADSL_HEADEND,
 145         CXINF_ADSL_HEADEND_ENVIRONMENT,
 146         CXINF_CONTROLLER_VERSION,
 147         /* dunno what the missing two mean */
 148         CXINF_MAX = 0x1c,
 149 };
 150
 151 enum cxacru_poll_state {
 152         CXPOLL_STOPPING,
 153         CXPOLL_STOPPED,
 154         CXPOLL_POLLING,
 155         CXPOLL_SHUTDOWN
 156 };
 157
 158 struct cxacru_modem_type {
 159         u32 pll_f_clk;
 160         u32 pll_b_clk;
 161         int boot_rom_patch;
 162 };
 163
 164 struct cxacru_data {
 165         struct usbatm_data *usbatm;
 166
 167         const struct cxacru_modem_type *modem_type;
 168
 169         int line_status;
 170         struct mutex adsl_state_serialize;
 171         int adsl_status;
 172         struct delayed_work poll_work;
 173         u32 card_info[CXINF_MAX];
 174         struct mutex poll_state_serialize;
 175         enum cxacru_poll_state poll_state;
 176
 177         /* contol handles */
 178         struct mutex cm_serialize;
 179         u8 *rcv_buf;
 180         u8 *snd_buf;
 181         struct urb *rcv_urb;
 182         struct urb *snd_urb;
 183         struct completion rcv_done;
 184         struct completion snd_done;
 185 };
 186
 187 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 188         u8 *wdata, int wsize, u8 *rdata, int rsize);
 189 static void cxacru_poll_status(struct work_struct *work);
 190
 191 /* Card info exported through sysfs */
 192 #define CXACRU__ATTR_INIT(_name) \
 193 static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
 194
 195 #define CXACRU_CMD_INIT(_name) \
 196 static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
 197         cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
 198
 199 #define CXACRU_ATTR_INIT(_value, _type, _name) \
 200 static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
 201         struct device_attribute *attr, char *buf) \
 202 { \
 203         struct usb_interface *intf = to_usb_interface(dev); \
 204         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); \
 205         struct cxacru_data *instance = usbatm_instance->driver_data; \
 206         return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
 207 } \
 208 CXACRU__ATTR_INIT(_name)
 209
 210 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
 211 #define CXACRU_CMD_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 212 #define CXACRU__ATTR_CREATE(_name)        CXACRU_DEVICE_CREATE_FILE(_name)
 213
 214 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
 215 #define CXACRU_CMD_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 216 #define CXACRU__ATTR_REMOVE(_name)        CXACRU_DEVICE_REMOVE_FILE(_name)
 217
 218 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
 219 {
 220         return snprintf(buf, PAGE_SIZE, "%u\n", value);
 221 }
 222
 223 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
 224 {
 225         return snprintf(buf, PAGE_SIZE, "%d\n", value);
 226 }
 227
 228 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
 229 {
 230         return snprintf(buf, PAGE_SIZE, "%d.%02u\n",
 231                                         value / 100, abs(value) % 100);
 232 }
 233
 234 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 235 {
 236         static char *str[] = { "no", "yes" };
 237         if (unlikely(value >= ARRAY_SIZE(str)))
 238                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 239         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 240 }
 241
 242 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 243 {
 244         static char *str[] = { NULL, "not connected", "connected", "lost" };
 245         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 246                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 247         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 248 }
 249
 250 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 251 {
 252         static char *str[] = { "down", "attempting to activate",
 253                 "training", "channel analysis", "exchange", "up",
 254                 "waiting", "initialising"
 255         };
 256         if (unlikely(value >= ARRAY_SIZE(str)))
 257                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 258         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 259 }
 260
 261 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 262 {
 263         static char *str[] = {
 264                         NULL,
 265                         "ANSI T1.413",
 266                         "ITU-T G.992.1 (G.DMT)",
 267                         "ITU-T G.992.2 (G.LITE)"
 268         };
 269         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 270                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 271         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 272 }
 273
 274 /*
 275  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 276  * this data is already in atm_dev there's no point.
 277  *
 278  * MAC_ADDRESS_HIGH = 0x????5544
 279  * MAC_ADDRESS_LOW  = 0x33221100
 280  * Where 00-55 are bytes 0-5 of the MAC.
 281  */
 282 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
 283         struct device_attribute *attr, char *buf)
 284 {
 285         struct usb_interface *intf = to_usb_interface(dev);
 286         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 287         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 288
 289         return snprintf(buf, PAGE_SIZE, "%pM\n", atm_dev->esi);
 290 }
 291
 292 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
 293         struct device_attribute *attr, char *buf)
 294 {
 295         struct usb_interface *intf = to_usb_interface(dev);
 296         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 297         struct cxacru_data *instance = usbatm_instance->driver_data;
 298         u32 value = instance->card_info[CXINF_LINE_STARTABLE];
 299
 300         static char *str[] = { "running", "stopped" };
 301         if (unlikely(value >= ARRAY_SIZE(str)))
 302                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 303         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 304 }
 305
 306 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
 307         struct device_attribute *attr, const char *buf, size_t count)
 308 {
 309         struct usb_interface *intf = to_usb_interface(dev);
 310         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 311         struct cxacru_data *instance = usbatm_instance->driver_data;
 312         int ret;
 313         int poll = -1;
 314         char str_cmd[8];
 315         int len = strlen(buf);
 316
 317         if (!capable(CAP_NET_ADMIN))
 318                 return -EACCES;
 319
 320         ret = sscanf(buf, "%7s", str_cmd);
 321         if (ret != 1)
 322                 return -EINVAL;
 323         ret = 0;
 324
 325         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 326                 return -ERESTARTSYS;
 327
 328         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 329                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 330                 if (ret < 0) {
 331                         atm_err(usbatm_instance, "change adsl state:"
 332                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 333
 334                         ret = -EIO;
 335                 } else {
 336                         ret = len;
 337                         poll = CXPOLL_STOPPED;
 338                 }
 339         }
 340
 341         /* Line status is only updated every second
 342          * and the device appears to only react to
 343          * START/STOP every second too. Wait 1.5s to
 344          * be sure that restart will have an effect. */
 345         if (!strcmp(str_cmd, "restart"))
 346                 msleep(1500);
 347
 348         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 349                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 350                 if (ret < 0) {
 351                         atm_err(usbatm_instance, "change adsl state:"
 352                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 353
 354                         ret = -EIO;
 355                 } else {
 356                         ret = len;
 357                         poll = CXPOLL_POLLING;
 358                 }
 359         }
 360
 361         if (!strcmp(str_cmd, "poll")) {
 362                 ret = len;
 363                 poll = CXPOLL_POLLING;
 364         }
 365
 366         if (ret == 0) {
 367                 ret = -EINVAL;
 368                 poll = -1;
 369         }
 370
 371         if (poll == CXPOLL_POLLING) {
 372                 mutex_lock(&instance->poll_state_serialize);
 373                 switch (instance->poll_state) {
 374                 case CXPOLL_STOPPED:
 375                         /* start polling */
 376                         instance->poll_state = CXPOLL_POLLING;
 377                         break;
 378
 379                 case CXPOLL_STOPPING:
 380                         /* abort stop request */
 381                         instance->poll_state = CXPOLL_POLLING;
 382                 case CXPOLL_POLLING:
 383                 case CXPOLL_SHUTDOWN:
 384                         /* don't start polling */
 385                         poll = -1;
 386                 }
 387                 mutex_unlock(&instance->poll_state_serialize);
 388         } else if (poll == CXPOLL_STOPPED) {
 389                 mutex_lock(&instance->poll_state_serialize);
 390                 /* request stop */
 391                 if (instance->poll_state == CXPOLL_POLLING)
 392                         instance->poll_state = CXPOLL_STOPPING;
 393                 mutex_unlock(&instance->poll_state_serialize);
 394         }
 395
 396         mutex_unlock(&instance->adsl_state_serialize);
 397
 398         if (poll == CXPOLL_POLLING)
 399                 cxacru_poll_status(&instance->poll_work.work);
 400
 401         return ret;
 402 }
 403
 404 /*
 405  * All device attributes are included in CXACRU_ALL_FILES
 406  * so that the same list can be used multiple times:
 407  *     INIT   (define the device attributes)
 408  *     CREATE (create all the device files)
 409  *     REMOVE (remove all the device files)
 410  *
 411  * With the last two being defined as needed in the functions
 412  * they are used in before calling CXACRU_ALL_FILES()
 413  */
 414 #define CXACRU_ALL_FILES(_action) \
 415 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 416 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 417 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 418 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 419 CXACRU__ATTR_##_action(                                      mac_address); \
 420 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 421 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 422 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 423 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 424 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 425 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 426 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 427 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 428 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 429 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 430 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 431 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 432 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 433 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 434 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 435 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 436 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 437 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 438 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 439 CXACRU_CMD_##_action(                                        adsl_state);
 440
 441 CXACRU_ALL_FILES(INIT);
 442
 443 /* the following three functions are stolen from drivers/usb/core/message.c */
 444 static void cxacru_blocking_completion(struct urb *urb)
 445 {
 446         complete(urb->context);
 447 }
 448
 449 static void cxacru_timeout_kill(unsigned long data)
 450 {
 451         usb_unlink_urb((struct urb *) data);
 452 }
 453
 454 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 455                                  int* actual_length)
 456 {
 457         struct timer_list timer;
 458
 459         init_timer(&timer);
 460         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
 461         timer.data = (unsigned long) urb;
 462         timer.function = cxacru_timeout_kill;
 463         add_timer(&timer);
 464         wait_for_completion(done);
 465         del_timer_sync(&timer);
 466
 467         if (actual_length)
 468                 *actual_length = urb->actual_length;
 469         return urb->status; /* must read status after completion */
 470 }
 471
 472 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 473                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 474 {
 475         int ret, actlen;
 476         int offb, offd;
 477         const int stride = CMD_PACKET_SIZE - 4;
 478         u8 *wbuf = instance->snd_buf;
 479         u8 *rbuf = instance->rcv_buf;
 480         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 481         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 482
 483         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 484                 if (printk_ratelimit())
 485                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
 486                                 wbuflen, rbuflen);
 487                 ret = -ENOMEM;
 488                 goto err;
 489         }
 490
 491         mutex_lock(&instance->cm_serialize);
 492
 493         /* submit reading urb before the writing one */
 494         init_completion(&instance->rcv_done);
 495         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 496         if (ret < 0) {
 497                 if (printk_ratelimit())
 498                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
 499                                 cm, ret);
 500                 goto fail;
 501         }
 502
 503         memset(wbuf, 0, wbuflen);
 504         /* handle wsize == 0 */
 505         wbuf[0] = cm;
 506         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 507                 wbuf[offb] = cm;
 508                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 509         }
 510
 511         instance->snd_urb->transfer_buffer_length = wbuflen;
 512         init_completion(&instance->snd_done);
 513         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 514         if (ret < 0) {
 515                 if (printk_ratelimit())
 516                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
 517                                 cm, ret);
 518                 goto fail;
 519         }
 520
 521         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 522         if (ret < 0) {
 523                 if (printk_ratelimit())
 524                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
 525                 goto fail;
 526         }
 527
 528         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 529         if (ret < 0) {
 530                 if (printk_ratelimit())
 531                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
 532                 goto fail;
 533         }
 534         if (actlen % CMD_PACKET_SIZE || !actlen) {
 535                 if (printk_ratelimit())
 536                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
 537                                 cm, actlen);
 538                 ret = -EIO;
 539                 goto fail;
 540         }
 541
 542         /* check the return status and copy the data to the output buffer, if needed */
 543         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 544                 if (rbuf[offb] != cm) {
 545                         if (printk_ratelimit())
 546                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
 547                                         rbuf[offb], cm);
 548                         ret = -EIO;
 549                         goto fail;
 550                 }
 551                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 552                         if (printk_ratelimit())
 553                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
 554                                         cm, rbuf[offb + 1]);
 555                         ret = -EIO;
 556                         goto fail;
 557                 }
 558                 if (offd >= rsize)
 559                         break;
 560                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 561                 offd += stride;
 562         }
 563
 564         ret = offd;
 565         dbg("cm %#x", cm);
 566 fail:
 567         mutex_unlock(&instance->cm_serialize);
 568 err:
 569         return ret;
 570 }
 571
 572 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 573                                u32 *data, int size)
 574 {
 575         int ret, len;
 576         __le32 *buf;
 577         int offb, offd;
 578         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 579         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 580
 581         buf = kmalloc(buflen, GFP_KERNEL);
 582         if (!buf)
 583                 return -ENOMEM;
 584
 585         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 586         if (ret < 0)
 587                 goto cleanup;
 588
 589         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 590         len = ret / 4;
 591         for (offb = 0; offb < len; ) {
 592                 int l = le32_to_cpu(buf[offb++]);
 593                 if (l > stride || l > (len - offb) / 2) {
 594                         if (printk_ratelimit())
 595                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
 596                                         cm, l);
 597                         ret = -EIO;
 598                         goto cleanup;
 599                 }
 600                 while (l--) {
 601                         offd = le32_to_cpu(buf[offb++]);
 602                         if (offd >= size) {
 603                                 if (printk_ratelimit())
 604                                         usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
 605                                                 offd, cm);
 606                                 ret = -EIO;
 607                                 goto cleanup;
 608                         }
 609                         data[offd] = le32_to_cpu(buf[offb++]);
 610                 }
 611         }
 612
 613         ret = 0;
 614
 615 cleanup:
 616         kfree(buf);
 617         return ret;
 618 }
 619
 620 static int cxacru_card_status(struct cxacru_data *instance)
 621 {
 622         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 623         if (ret < 0) {          /* firmware not loaded */
 624                 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
 625                 return ret;
 626         }
 627         return 0;
 628 }
 629
 630 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 631                 struct atm_dev *atm_dev)
 632 {
 633         struct usb_interface *intf = usbatm_instance->usb_intf;
 634
 635         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 636                 device_remove_file(&intf->dev, &dev_attr_##_name);
 637         CXACRU_ALL_FILES(REMOVE);
 638         #undef CXACRU_DEVICE_REMOVE_FILE
 639 }
 640
 641 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 642                 struct atm_dev *atm_dev)
 643 {
 644         struct cxacru_data *instance = usbatm_instance->driver_data;
 645         struct usb_interface *intf = usbatm_instance->usb_intf;
 646         /*
 647         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 648         */
 649         int ret;
 650         int start_polling = 1;
 651
 652         dbg("cxacru_atm_start");
 653
 654         /* Read MAC address */
 655         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 656                         atm_dev->esi, sizeof(atm_dev->esi));
 657         if (ret < 0) {
 658                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 659                 return ret;
 660         }
 661
 662         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 663                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 664                 if (unlikely(ret)) \
 665                         goto fail_sysfs;
 666         CXACRU_ALL_FILES(CREATE);
 667         #undef CXACRU_DEVICE_CREATE_FILE
 668
 669         /* start ADSL */
 670         mutex_lock(&instance->adsl_state_serialize);
 671         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 672         if (ret < 0)
 673                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 674
 675         /* Start status polling */
 676         mutex_lock(&instance->poll_state_serialize);
 677         switch (instance->poll_state) {
 678         case CXPOLL_STOPPED:
 679                 /* start polling */
 680                 instance->poll_state = CXPOLL_POLLING;
 681                 break;
 682
 683         case CXPOLL_STOPPING:
 684                 /* abort stop request */
 685                 instance->poll_state = CXPOLL_POLLING;
 686         case CXPOLL_POLLING:
 687         case CXPOLL_SHUTDOWN:
 688                 /* don't start polling */
 689                 start_polling = 0;
 690         }
 691         mutex_unlock(&instance->poll_state_serialize);
 692         mutex_unlock(&instance->adsl_state_serialize);
 693
 694         if (start_polling)
 695                 cxacru_poll_status(&instance->poll_work.work);
 696         return 0;
 697
 698 fail_sysfs:
 699         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 700         cxacru_remove_device_files(usbatm_instance, atm_dev);
 701         return ret;
 702 }
 703
 704 static void cxacru_poll_status(struct work_struct *work)
 705 {
 706         struct cxacru_data *instance =
 707                 container_of(work, struct cxacru_data, poll_work.work);
 708         u32 buf[CXINF_MAX] = {};
 709         struct usbatm_data *usbatm = instance->usbatm;
 710         struct atm_dev *atm_dev = usbatm->atm_dev;
 711         int keep_polling = 1;
 712         int ret;
 713
 714         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 715         if (ret < 0) {
 716                 if (ret != -ESHUTDOWN)
 717                         atm_warn(usbatm, "poll status: error %d\n", ret);
 718
 719                 mutex_lock(&instance->poll_state_serialize);
 720                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 721                         instance->poll_state = CXPOLL_STOPPED;
 722
 723                         if (ret != -ESHUTDOWN)
 724                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 725                                                 " to 'start' or 'poll' to resume\n");
 726                 }
 727                 mutex_unlock(&instance->poll_state_serialize);
 728                 goto reschedule;
 729         }
 730
 731         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 732
 733         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 734                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 735
 736                 switch (instance->adsl_status) {
 737                 case 0:
 738                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 739                         break;
 740
 741                 case 1:
 742                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 743                         break;
 744
 745                 default:
 746                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 747                         break;
 748                 }
 749         }
 750
 751         if (instance->line_status == buf[CXINF_LINE_STATUS])
 752                 goto reschedule;
 753
 754         instance->line_status = buf[CXINF_LINE_STATUS];
 755         switch (instance->line_status) {
 756         case 0:
 757                 atm_dev->signal = ATM_PHY_SIG_LOST;
 758                 atm_info(usbatm, "ADSL line: down\n");
 759                 break;
 760
 761         case 1:
 762                 atm_dev->signal = ATM_PHY_SIG_LOST;
 763                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 764                 break;
 765
 766         case 2:
 767                 atm_dev->signal = ATM_PHY_SIG_LOST;
 768                 atm_info(usbatm, "ADSL line: training\n");
 769                 break;
 770
 771         case 3:
 772                 atm_dev->signal = ATM_PHY_SIG_LOST;
 773                 atm_info(usbatm, "ADSL line: channel analysis\n");
 774                 break;
 775
 776         case 4:
 777                 atm_dev->signal = ATM_PHY_SIG_LOST;
 778                 atm_info(usbatm, "ADSL line: exchange\n");
 779                 break;
 780
 781         case 5:
 782                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 783                 atm_dev->signal = ATM_PHY_SIG_FOUND;
 784
 785                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 786                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 787                 break;
 788
 789         case 6:
 790                 atm_dev->signal = ATM_PHY_SIG_LOST;
 791                 atm_info(usbatm, "ADSL line: waiting\n");
 792                 break;
 793
 794         case 7:
 795                 atm_dev->signal = ATM_PHY_SIG_LOST;
 796                 atm_info(usbatm, "ADSL line: initializing\n");
 797                 break;
 798
 799         default:
 800                 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 801                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 802                 break;
 803         }
 804 reschedule:
 805
 806         mutex_lock(&instance->poll_state_serialize);
 807         if (instance->poll_state == CXPOLL_STOPPING &&
 808                                 instance->adsl_status == 1 && /* stopped */
 809                                 instance->line_status == 0) /* down */
 810                 instance->poll_state = CXPOLL_STOPPED;
 811
 812         if (instance->poll_state == CXPOLL_STOPPED)
 813                 keep_polling = 0;
 814         mutex_unlock(&instance->poll_state_serialize);
 815
 816         if (keep_polling)
 817                 schedule_delayed_work(&instance->poll_work,
 818                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 819 }
 820
 821 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 822                      u8 code1, u8 code2, u32 addr, const u8 *data, int size)
 823 {
 824         int ret;
 825         u8 *buf;
 826         int offd, offb;
 827         const int stride = CMD_PACKET_SIZE - 8;
 828
 829         buf = (u8 *) __get_free_page(GFP_KERNEL);
 830         if (!buf)
 831                 return -ENOMEM;
 832
 833         offb = offd = 0;
 834         do {
 835                 int l = min_t(int, stride, size - offd);
 836                 buf[offb++] = fw;
 837                 buf[offb++] = l;
 838                 buf[offb++] = code1;
 839                 buf[offb++] = code2;
 840                 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
 841                 offb += 4;
 842                 addr += l;
 843                 if(l)
 844                         memcpy(buf + offb, data + offd, l);
 845                 if (l < stride)
 846                         memset(buf + offb + l, 0, stride - l);
 847                 offb += stride;
 848                 offd += stride;
 849                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 850                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 851                                            buf, offb, NULL, CMD_TIMEOUT);
 852                         if (ret < 0) {
 853                                 dbg("sending fw %#x failed", fw);
 854                                 goto cleanup;
 855                         }
 856                         offb = 0;
 857                 }
 858         } while(offd < size);
 859         dbg("sent fw %#x", fw);
 860
 861         ret = 0;
 862
 863 cleanup:
 864         free_page((unsigned long) buf);
 865         return ret;
 866 }
 867
 868 static void cxacru_upload_firmware(struct cxacru_data *instance,
 869                                    const struct firmware *fw,
 870                                    const struct firmware *bp,
 871                                    const struct firmware *cf)
 872 {
 873         int ret;
 874         int off;
 875         struct usbatm_data *usbatm = instance->usbatm;
 876         struct usb_device *usb_dev = usbatm->usb_dev;
 877         __le16 signature[] = { usb_dev->descriptor.idVendor,
 878                                usb_dev->descriptor.idProduct };
 879         __le32 val;
 880
 881         dbg("cxacru_upload_firmware");
 882
 883         /* FirmwarePllFClkValue */
 884         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 885         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 886         if (ret) {
 887                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
 888                 return;
 889         }
 890
 891         /* FirmwarePllBClkValue */
 892         val = cpu_to_le32(instance->modem_type->pll_b_clk);
 893         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
 894         if (ret) {
 895                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
 896                 return;
 897         }
 898
 899         /* Enable SDRAM */
 900         val = cpu_to_le32(SDRAM_ENA);
 901         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
 902         if (ret) {
 903                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
 904                 return;
 905         }
 906
 907         /* Firmware */
 908         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
 909         if (ret) {
 910                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
 911                 return;
 912         }
 913
 914         /* Boot ROM patch */
 915         if (instance->modem_type->boot_rom_patch) {
 916                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
 917                 if (ret) {
 918                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
 919                         return;
 920                 }
 921         }
 922
 923         /* Signature */
 924         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
 925         if (ret) {
 926                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
 927                 return;
 928         }
 929
 930         if (instance->modem_type->boot_rom_patch) {
 931                 val = cpu_to_le32(BR_ADDR);
 932                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
 933         }
 934         else {
 935                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
 936         }
 937         if (ret) {
 938                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
 939                 return;
 940         }
 941
 942         /* Delay to allow firmware to start up. */
 943         msleep_interruptible(1000);
 944
 945         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
 946         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
 947         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
 948         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
 949
 950         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 951         if (ret < 0) {
 952                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
 953                 return;
 954         }
 955
 956         /* Load config data (le32), doing one packet at a time */
 957         if (cf)
 958                 for (off = 0; off < cf->size / 4; ) {
 959                         __le32 buf[CMD_PACKET_SIZE / 4 - 1];
 960                         int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
 961                         buf[0] = cpu_to_le32(len);
 962                         for (i = 0; i < len; i++, off++) {
 963                                 buf[i * 2 + 1] = cpu_to_le32(off);
 964                                 memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
 965                         }
 966                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 967                                         (u8 *) buf, len, NULL, 0);
 968                         if (ret < 0) {
 969                                 usb_err(usbatm, "load config data failed: %d\n", ret);
 970                                 return;
 971                         }
 972                 }
 973
 974         msleep_interruptible(4000);
 975 }
 976
 977 static int cxacru_find_firmware(struct cxacru_data *instance,
 978                                 char* phase, const struct firmware **fw_p)
 979 {
 980         struct usbatm_data *usbatm = instance->usbatm;
 981         struct device *dev = &usbatm->usb_intf->dev;
 982         char buf[16];
 983
 984         sprintf(buf, "cxacru-%s.bin", phase);
 985         dbg("cxacru_find_firmware: looking for %s", buf);
 986
 987         if (request_firmware(fw_p, buf, dev)) {
 988                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
 989                 return -ENOENT;
 990         }
 991
 992         usb_info(usbatm, "found firmware %s\n", buf);
 993
 994         return 0;
 995 }
 996
 997 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
 998                              struct usb_interface *usb_intf)
 999 {
1000         const struct firmware *fw, *bp, *cf;
1001         struct cxacru_data *instance = usbatm_instance->driver_data;
1002
1003         int ret = cxacru_find_firmware(instance, "fw", &fw);
1004         if (ret) {
1005                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1006                 return ret;
1007         }
1008
1009         if (instance->modem_type->boot_rom_patch) {
1010                 ret = cxacru_find_firmware(instance, "bp", &bp);
1011                 if (ret) {
1012                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1013                         release_firmware(fw);
1014                         return ret;
1015                 }
1016         }
1017
1018         if (cxacru_find_firmware(instance, "cf", &cf))          /* optional */
1019                 cf = NULL;
1020
1021         cxacru_upload_firmware(instance, fw, bp, cf);
1022
1023         if (cf)
1024                 release_firmware(cf);
1025         if (instance->modem_type->boot_rom_patch)
1026                 release_firmware(bp);
1027         release_firmware(fw);
1028
1029         ret = cxacru_card_status(instance);
1030         if (ret)
1031                 dbg("modem initialisation failed");
1032         else
1033                 dbg("done setting up the modem");
1034
1035         return ret;
1036 }
1037
1038 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1039                        struct usb_interface *intf, const struct usb_device_id *id)
1040 {
1041         struct cxacru_data *instance;
1042         struct usb_device *usb_dev = interface_to_usbdev(intf);
1043         int ret;
1044
1045         /* instance init */
1046         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1047         if (!instance) {
1048                 dbg("cxacru_bind: no memory for instance data");
1049                 return -ENOMEM;
1050         }
1051
1052         instance->usbatm = usbatm_instance;
1053         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1054
1055         mutex_init(&instance->poll_state_serialize);
1056         instance->poll_state = CXPOLL_STOPPED;
1057         instance->line_status = -1;
1058         instance->adsl_status = -1;
1059
1060         mutex_init(&instance->adsl_state_serialize);
1061
1062         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1063         if (!instance->rcv_buf) {
1064                 dbg("cxacru_bind: no memory for rcv_buf");
1065                 ret = -ENOMEM;
1066                 goto fail;
1067         }
1068         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1069         if (!instance->snd_buf) {
1070                 dbg("cxacru_bind: no memory for snd_buf");
1071                 ret = -ENOMEM;
1072                 goto fail;
1073         }
1074         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1075         if (!instance->rcv_urb) {
1076                 dbg("cxacru_bind: no memory for rcv_urb");
1077                 ret = -ENOMEM;
1078                 goto fail;
1079         }
1080         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1081         if (!instance->snd_urb) {
1082                 dbg("cxacru_bind: no memory for snd_urb");
1083                 ret = -ENOMEM;
1084                 goto fail;
1085         }
1086
1087         usb_fill_int_urb(instance->rcv_urb,
1088                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1089                         instance->rcv_buf, PAGE_SIZE,
1090                         cxacru_blocking_completion, &instance->rcv_done, 1);
1091
1092         usb_fill_int_urb(instance->snd_urb,
1093                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1094                         instance->snd_buf, PAGE_SIZE,
1095                         cxacru_blocking_completion, &instance->snd_done, 4);
1096
1097         mutex_init(&instance->cm_serialize);
1098
1099         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1100
1101         usbatm_instance->driver_data = instance;
1102
1103         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1104
1105         return 0;
1106
1107  fail:
1108         free_page((unsigned long) instance->snd_buf);
1109         free_page((unsigned long) instance->rcv_buf);
1110         usb_free_urb(instance->snd_urb);
1111         usb_free_urb(instance->rcv_urb);
1112         kfree(instance);
1113
1114         return ret;
1115 }
1116
1117 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1118                 struct usb_interface *intf)
1119 {
1120         struct cxacru_data *instance = usbatm_instance->driver_data;
1121         int is_polling = 1;
1122
1123         dbg("cxacru_unbind entered");
1124
1125         if (!instance) {
1126                 dbg("cxacru_unbind: NULL instance!");
1127                 return;
1128         }
1129
1130         mutex_lock(&instance->poll_state_serialize);
1131         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1132
1133         /* ensure that status polling continues unless
1134          * it has already stopped */
1135         if (instance->poll_state == CXPOLL_STOPPED)
1136                 is_polling = 0;
1137
1138         /* stop polling from being stopped or started */
1139         instance->poll_state = CXPOLL_SHUTDOWN;
1140         mutex_unlock(&instance->poll_state_serialize);
1141
1142         if (is_polling)
1143                 cancel_rearming_delayed_work(&instance->poll_work);
1144
1145         usb_kill_urb(instance->snd_urb);
1146         usb_kill_urb(instance->rcv_urb);
1147         usb_free_urb(instance->snd_urb);
1148         usb_free_urb(instance->rcv_urb);
1149
1150         free_page((unsigned long) instance->snd_buf);
1151         free_page((unsigned long) instance->rcv_buf);
1152
1153         kfree(instance);
1154
1155         usbatm_instance->driver_data = NULL;
1156 }
1157
1158 static const struct cxacru_modem_type cxacru_cafe = {
1159         .pll_f_clk = 0x02d874df,
1160         .pll_b_clk = 0x0196a51a,
1161         .boot_rom_patch = 1,
1162 };
1163
1164 static const struct cxacru_modem_type cxacru_cb00 = {
1165         .pll_f_clk = 0x5,
1166         .pll_b_clk = 0x3,
1167         .boot_rom_patch = 0,
1168 };
1169
1170 static const struct usb_device_id cxacru_usb_ids[] = {
1171         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1172                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1173         },
1174         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1175                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1176         },
1177         { /* V = Conexant                       P = ADSL modem                          */
1178                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1179         },
1180         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1181                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1182         },
1183         { /* V = Conexant                       P = ADSL modem                          */
1184                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1185         },
1186         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1187                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1188         },
1189         { /* V = Olitec                         P = ADSL modem version 2                */
1190                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1191         },
1192         { /* V = Olitec                         P = ADSL modem version 3                */
1193                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1194         },
1195         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1196                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1197         },
1198         { /* V = Zoom                           P = 5510                                */
1199                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1200         },
1201         { /* V = Draytek                        P = Vigor 318                           */
1202                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1203         },
1204         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1205                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1206         },
1207         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1208                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1209         },
1210         { /* V = Aethra                         P = Starmodem UM1020                    */
1211                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1212         },
1213         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1214                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1215         },
1216         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1217                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1218         },
1219         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1220                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1221         },
1222         {}
1223 };
1224
1225 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1226
1227 static struct usbatm_driver cxacru_driver = {
1228         .driver_name    = cxacru_driver_name,
1229         .bind           = cxacru_bind,
1230         .heavy_init     = cxacru_heavy_init,
1231         .unbind         = cxacru_unbind,
1232         .atm_start      = cxacru_atm_start,
1233         .atm_stop       = cxacru_remove_device_files,
1234         .bulk_in        = CXACRU_EP_DATA,
1235         .bulk_out       = CXACRU_EP_DATA,
1236         .rx_padding     = 3,
1237         .tx_padding     = 11,
1238 };
1239
1240 static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1241 {
1242         return usbatm_usb_probe(intf, id, &cxacru_driver);
1243 }
1244
1245 static struct usb_driver cxacru_usb_driver = {
1246         .name           = cxacru_driver_name,
1247         .probe          = cxacru_usb_probe,
1248         .disconnect     = usbatm_usb_disconnect,
1249         .id_table       = cxacru_usb_ids
1250 };
1251
1252 static int __init cxacru_init(void)
1253 {
1254         return usb_register(&cxacru_usb_driver);
1255 }
1256
1257 static void __exit cxacru_cleanup(void)
1258 {
1259         usb_deregister(&cxacru_usb_driver);
1260 }
1261
1262 module_init(cxacru_init);
1263 module_exit(cxacru_cleanup);
1264
1265 MODULE_AUTHOR(DRIVER_AUTHOR);
1266 MODULE_DESCRIPTION(DRIVER_DESC);
1267 MODULE_LICENSE("GPL");
1268 MODULE_VERSION(DRIVER_VERSION);