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
  42 #include "usbatm.h"
  43
  44 #define DRIVER_AUTHOR   "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
  45 #define DRIVER_VERSION  "0.3"
  46 #define DRIVER_DESC     "Conexant AccessRunner ADSL USB modem driver"
  47
  48 static const char cxacru_driver_name[] = "cxacru";
  49
  50 #define CXACRU_EP_CMD           0x01    /* Bulk/interrupt in/out */
  51 #define CXACRU_EP_DATA          0x02    /* Bulk in/out */
  52
  53 #define CMD_PACKET_SIZE         64      /* Should be maxpacket(ep)? */
  54
  55 /* Addresses */
  56 #define PLLFCLK_ADDR    0x00350068
  57 #define PLLBCLK_ADDR    0x0035006c
  58 #define SDRAMEN_ADDR    0x00350010
  59 #define FW_ADDR         0x00801000
  60 #define BR_ADDR         0x00180600
  61 #define SIG_ADDR        0x00180500
  62 #define BR_STACK_ADDR   0x00187f10
  63
  64 /* Values */
  65 #define SDRAM_ENA       0x1
  66
  67 #define CMD_TIMEOUT     2000    /* msecs */
  68 #define POLL_INTERVAL   1       /* secs */
  69
  70 /* commands for interaction with the modem through the control channel before
  71  * firmware is loaded  */
  72 enum cxacru_fw_request {
  73         FW_CMD_ERR,
  74         FW_GET_VER,
  75         FW_READ_MEM,
  76         FW_WRITE_MEM,
  77         FW_RMW_MEM,
  78         FW_CHECKSUM_MEM,
  79         FW_GOTO_MEM,
  80 };
  81
  82 /* commands for interaction with the modem through the control channel once
  83  * firmware is loaded  */
  84 enum cxacru_cm_request {
  85         CM_REQUEST_UNDEFINED = 0x80,
  86         CM_REQUEST_TEST,
  87         CM_REQUEST_CHIP_GET_MAC_ADDRESS,
  88         CM_REQUEST_CHIP_GET_DP_VERSIONS,
  89         CM_REQUEST_CHIP_ADSL_LINE_START,
  90         CM_REQUEST_CHIP_ADSL_LINE_STOP,
  91         CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
  92         CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
  93         CM_REQUEST_CARD_INFO_GET,
  94         CM_REQUEST_CARD_DATA_GET,
  95         CM_REQUEST_CARD_DATA_SET,
  96         CM_REQUEST_COMMAND_HW_IO,
  97         CM_REQUEST_INTERFACE_HW_IO,
  98         CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
  99         CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
 100         CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
 101         CM_REQUEST_CARD_GET_STATUS,
 102         CM_REQUEST_CARD_GET_MAC_ADDRESS,
 103         CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
 104         CM_REQUEST_MAX,
 105 };
 106
 107 /* reply codes to the commands above */
 108 enum cxacru_cm_status {
 109         CM_STATUS_UNDEFINED,
 110         CM_STATUS_SUCCESS,
 111         CM_STATUS_ERROR,
 112         CM_STATUS_UNSUPPORTED,
 113         CM_STATUS_UNIMPLEMENTED,
 114         CM_STATUS_PARAMETER_ERROR,
 115         CM_STATUS_DBG_LOOPBACK,
 116         CM_STATUS_MAX,
 117 };
 118
 119 /* indices into CARD_INFO_GET return array */
 120 enum cxacru_info_idx {
 121         CXINF_DOWNSTREAM_RATE,
 122         CXINF_UPSTREAM_RATE,
 123         CXINF_LINK_STATUS,
 124         CXINF_LINE_STATUS,
 125         CXINF_MAC_ADDRESS_HIGH,
 126         CXINF_MAC_ADDRESS_LOW,
 127         CXINF_UPSTREAM_SNR_MARGIN,
 128         CXINF_DOWNSTREAM_SNR_MARGIN,
 129         CXINF_UPSTREAM_ATTENUATION,
 130         CXINF_DOWNSTREAM_ATTENUATION,
 131         CXINF_TRANSMITTER_POWER,
 132         CXINF_UPSTREAM_BITS_PER_FRAME,
 133         CXINF_DOWNSTREAM_BITS_PER_FRAME,
 134         CXINF_STARTUP_ATTEMPTS,
 135         CXINF_UPSTREAM_CRC_ERRORS,
 136         CXINF_DOWNSTREAM_CRC_ERRORS,
 137         CXINF_UPSTREAM_FEC_ERRORS,
 138         CXINF_DOWNSTREAM_FEC_ERRORS,
 139         CXINF_UPSTREAM_HEC_ERRORS,
 140         CXINF_DOWNSTREAM_HEC_ERRORS,
 141         CXINF_LINE_STARTABLE,
 142         CXINF_MODULATION,
 143         CXINF_ADSL_HEADEND,
 144         CXINF_ADSL_HEADEND_ENVIRONMENT,
 145         CXINF_CONTROLLER_VERSION,
 146         /* dunno what the missing two mean */
 147         CXINF_MAX = 0x1c,
 148 };
 149
 150 enum cxacru_poll_state {
 151         CXPOLL_STOPPING,
 152         CXPOLL_STOPPED,
 153         CXPOLL_POLLING,
 154         CXPOLL_SHUTDOWN
 155 };
 156
 157 struct cxacru_modem_type {
 158         u32 pll_f_clk;
 159         u32 pll_b_clk;
 160         int boot_rom_patch;
 161 };
 162
 163 struct cxacru_data {
 164         struct usbatm_data *usbatm;
 165
 166         const struct cxacru_modem_type *modem_type;
 167
 168         int line_status;
 169         struct mutex adsl_state_serialize;
 170         int adsl_status;
 171         struct delayed_work poll_work;
 172         u32 card_info[CXINF_MAX];
 173         struct mutex poll_state_serialize;
 174         enum cxacru_poll_state poll_state;
 175
 176         /* contol handles */
 177         struct mutex cm_serialize;
 178         u8 *rcv_buf;
 179         u8 *snd_buf;
 180         struct urb *rcv_urb;
 181         struct urb *snd_urb;
 182         struct completion rcv_done;
 183         struct completion snd_done;
 184 };
 185
 186 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 187         u8 *wdata, int wsize, u8 *rdata, int rsize);
 188 static void cxacru_poll_status(struct work_struct *work);
 189
 190 /* Card info exported through sysfs */
 191 #define CXACRU__ATTR_INIT(_name) \
 192 static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
 193
 194 #define CXACRU_CMD_INIT(_name) \
 195 static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
 196         cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
 197
 198 #define CXACRU_ATTR_INIT(_value, _type, _name) \
 199 static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
 200         struct device_attribute *attr, char *buf) \
 201 { \
 202         struct usb_interface *intf = to_usb_interface(dev); \
 203         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); \
 204         struct cxacru_data *instance = usbatm_instance->driver_data; \
 205         return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
 206 } \
 207 CXACRU__ATTR_INIT(_name)
 208
 209 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
 210 #define CXACRU_CMD_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 211 #define CXACRU__ATTR_CREATE(_name)        CXACRU_DEVICE_CREATE_FILE(_name)
 212
 213 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
 214 #define CXACRU_CMD_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 215 #define CXACRU__ATTR_REMOVE(_name)        CXACRU_DEVICE_REMOVE_FILE(_name)
 216
 217 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
 218 {
 219         return snprintf(buf, PAGE_SIZE, "%u\n", value);
 220 }
 221
 222 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
 223 {
 224         return snprintf(buf, PAGE_SIZE, "%d\n", value);
 225 }
 226
 227 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
 228 {
 229         return snprintf(buf, PAGE_SIZE, "%d.%02u\n",
 230                                         value / 100, abs(value) % 100);
 231 }
 232
 233 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 234 {
 235         static char *str[] = { "no", "yes" };
 236         if (unlikely(value >= ARRAY_SIZE(str)))
 237                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 238         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 239 }
 240
 241 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 242 {
 243         static char *str[] = { NULL, "not connected", "connected", "lost" };
 244         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 245                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 246         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 247 }
 248
 249 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 250 {
 251         static char *str[] = { "down", "attempting to activate",
 252                 "training", "channel analysis", "exchange", "up",
 253                 "waiting", "initialising"
 254         };
 255         if (unlikely(value >= ARRAY_SIZE(str)))
 256                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 257         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 258 }
 259
 260 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 261 {
 262         static char *str[] = {
 263                         NULL,
 264                         "ANSI T1.413",
 265                         "ITU-T G.992.1 (G.DMT)",
 266                         "ITU-T G.992.2 (G.LITE)"
 267         };
 268         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 269                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 270         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 271 }
 272
 273 /*
 274  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 275  * this data is already in atm_dev there's no point.
 276  *
 277  * MAC_ADDRESS_HIGH = 0x????5544
 278  * MAC_ADDRESS_LOW  = 0x33221100
 279  * Where 00-55 are bytes 0-5 of the MAC.
 280  */
 281 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
 282         struct device_attribute *attr, char *buf)
 283 {
 284         struct usb_interface *intf = to_usb_interface(dev);
 285         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 286         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 287
 288         return snprintf(buf, PAGE_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x\n",
 289                         atm_dev->esi[0], atm_dev->esi[1], atm_dev->esi[2],
 290                         atm_dev->esi[3], atm_dev->esi[4], atm_dev->esi[5]);
 291 }
 292
 293 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
 294         struct device_attribute *attr, char *buf)
 295 {
 296         struct usb_interface *intf = to_usb_interface(dev);
 297         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 298         struct cxacru_data *instance = usbatm_instance->driver_data;
 299         u32 value = instance->card_info[CXINF_LINE_STARTABLE];
 300
 301         static char *str[] = { "running", "stopped" };
 302         if (unlikely(value >= ARRAY_SIZE(str)))
 303                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 304         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 305 }
 306
 307 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
 308         struct device_attribute *attr, const char *buf, size_t count)
 309 {
 310         struct usb_interface *intf = to_usb_interface(dev);
 311         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 312         struct cxacru_data *instance = usbatm_instance->driver_data;
 313         int ret;
 314         int poll = -1;
 315         char str_cmd[8];
 316         int len = strlen(buf);
 317
 318         if (!capable(CAP_NET_ADMIN))
 319                 return -EACCES;
 320
 321         ret = sscanf(buf, "%7s", str_cmd);
 322         if (ret != 1)
 323                 return -EINVAL;
 324         ret = 0;
 325
 326         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 327                 return -ERESTARTSYS;
 328
 329         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 330                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 331                 if (ret < 0) {
 332                         atm_err(usbatm_instance, "change adsl state:"
 333                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 334
 335                         ret = -EIO;
 336                 } else {
 337                         ret = len;
 338                         poll = CXPOLL_STOPPED;
 339                 }
 340         }
 341
 342         /* Line status is only updated every second
 343          * and the device appears to only react to
 344          * START/STOP every second too. Wait 1.5s to
 345          * be sure that restart will have an effect. */
 346         if (!strcmp(str_cmd, "restart"))
 347                 msleep(1500);
 348
 349         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 350                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 351                 if (ret < 0) {
 352                         atm_err(usbatm_instance, "change adsl state:"
 353                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 354
 355                         ret = -EIO;
 356                 } else {
 357                         ret = len;
 358                         poll = CXPOLL_POLLING;
 359                 }
 360         }
 361
 362         if (!strcmp(str_cmd, "poll")) {
 363                 ret = len;
 364                 poll = CXPOLL_POLLING;
 365         }
 366
 367         if (ret == 0) {
 368                 ret = -EINVAL;
 369                 poll = -1;
 370         }
 371
 372         if (poll == CXPOLL_POLLING) {
 373                 mutex_lock(&instance->poll_state_serialize);
 374                 switch (instance->poll_state) {
 375                 case CXPOLL_STOPPED:
 376                         /* start polling */
 377                         instance->poll_state = CXPOLL_POLLING;
 378                         break;
 379
 380                 case CXPOLL_STOPPING:
 381                         /* abort stop request */
 382                         instance->poll_state = CXPOLL_POLLING;
 383                 case CXPOLL_POLLING:
 384                 case CXPOLL_SHUTDOWN:
 385                         /* don't start polling */
 386                         poll = -1;
 387                 }
 388                 mutex_unlock(&instance->poll_state_serialize);
 389         } else if (poll == CXPOLL_STOPPED) {
 390                 mutex_lock(&instance->poll_state_serialize);
 391                 /* request stop */
 392                 if (instance->poll_state == CXPOLL_POLLING)
 393                         instance->poll_state = CXPOLL_STOPPING;
 394                 mutex_unlock(&instance->poll_state_serialize);
 395         }
 396
 397         mutex_unlock(&instance->adsl_state_serialize);
 398
 399         if (poll == CXPOLL_POLLING)
 400                 cxacru_poll_status(&instance->poll_work.work);
 401
 402         return ret;
 403 }
 404
 405 /*
 406  * All device attributes are included in CXACRU_ALL_FILES
 407  * so that the same list can be used multiple times:
 408  *     INIT   (define the device attributes)
 409  *     CREATE (create all the device files)
 410  *     REMOVE (remove all the device files)
 411  *
 412  * With the last two being defined as needed in the functions
 413  * they are used in before calling CXACRU_ALL_FILES()
 414  */
 415 #define CXACRU_ALL_FILES(_action) \
 416 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 417 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 418 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 419 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 420 CXACRU__ATTR_##_action(                                      mac_address); \
 421 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 422 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 423 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 424 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 425 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 426 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 427 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 428 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 429 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 430 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 431 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 432 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 433 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 434 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 435 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 436 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 437 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 438 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 439 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 440 CXACRU_CMD_##_action(                                        adsl_state);
 441
 442 CXACRU_ALL_FILES(INIT);
 443
 444 /* the following three functions are stolen from drivers/usb/core/message.c */
 445 static void cxacru_blocking_completion(struct urb *urb)
 446 {
 447         complete((struct completion *)urb->context);
 448 }
 449
 450 static void cxacru_timeout_kill(unsigned long data)
 451 {
 452         usb_unlink_urb((struct urb *) data);
 453 }
 454
 455 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 456                                  int* actual_length)
 457 {
 458         struct timer_list timer;
 459         int status;
 460
 461         init_timer(&timer);
 462         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
 463         timer.data = (unsigned long) urb;
 464         timer.function = cxacru_timeout_kill;
 465         add_timer(&timer);
 466         wait_for_completion(done);
 467         status = urb->status;
 468         del_timer_sync(&timer);
 469
 470         if (actual_length)
 471                 *actual_length = urb->actual_length;
 472         return status;
 473 }
 474
 475 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 476                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 477 {
 478         int ret, actlen;
 479         int offb, offd;
 480         const int stride = CMD_PACKET_SIZE - 4;
 481         u8 *wbuf = instance->snd_buf;
 482         u8 *rbuf = instance->rcv_buf;
 483         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 484         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 485
 486         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 487                 dbg("too big transfer requested");
 488                 ret = -ENOMEM;
 489                 goto fail;
 490         }
 491
 492         mutex_lock(&instance->cm_serialize);
 493
 494         /* submit reading urb before the writing one */
 495         init_completion(&instance->rcv_done);
 496         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 497         if (ret < 0) {
 498                 dbg("submitting read urb for cm %#x failed", cm);
 499                 ret = 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                 dbg("submitting write urb for cm %#x failed", cm);
 516                 ret = ret;
 517                 goto fail;
 518         }
 519
 520         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 521         if (ret < 0) {
 522                 dbg("sending cm %#x failed", cm);
 523                 ret = ret;
 524                 goto fail;
 525         }
 526
 527         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 528         if (ret < 0) {
 529                 dbg("receiving cm %#x failed", cm);
 530                 ret = ret;
 531                 goto fail;
 532         }
 533         if (actlen % CMD_PACKET_SIZE || !actlen) {
 534                 dbg("response is not a positive multiple of %d: %#x",
 535                                 CMD_PACKET_SIZE, actlen);
 536                 ret = -EIO;
 537                 goto fail;
 538         }
 539
 540         /* check the return status and copy the data to the output buffer, if needed */
 541         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 542                 if (rbuf[offb] != cm) {
 543                         dbg("wrong cm %#x in response", rbuf[offb]);
 544                         ret = -EIO;
 545                         goto fail;
 546                 }
 547                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 548                         dbg("response failed: %#x", rbuf[offb + 1]);
 549                         ret = -EIO;
 550                         goto fail;
 551                 }
 552                 if (offd >= rsize)
 553                         break;
 554                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 555                 offd += stride;
 556         }
 557
 558         ret = offd;
 559         dbg("cm %#x", cm);
 560 fail:
 561         mutex_unlock(&instance->cm_serialize);
 562         return ret;
 563 }
 564
 565 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 566                                u32 *data, int size)
 567 {
 568         int ret, len;
 569         u32 *buf;
 570         int offb, offd;
 571         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 572         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 573
 574         buf = kmalloc(buflen, GFP_KERNEL);
 575         if (!buf)
 576                 return -ENOMEM;
 577
 578         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 579         if (ret < 0)
 580                 goto cleanup;
 581
 582         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 583         len = ret / 4;
 584         for (offb = 0; offb < len; ) {
 585                 int l = le32_to_cpu(buf[offb++]);
 586                 if (l > stride || l > (len - offb) / 2) {
 587                         dbg("wrong data length %#x in response", l);
 588                         ret = -EIO;
 589                         goto cleanup;
 590                 }
 591                 while (l--) {
 592                         offd = le32_to_cpu(buf[offb++]);
 593                         if (offd >= size) {
 594                                 dbg("wrong index %#x in response", offd);
 595                                 ret = -EIO;
 596                                 goto cleanup;
 597                         }
 598                         data[offd] = le32_to_cpu(buf[offb++]);
 599                 }
 600         }
 601
 602         ret = 0;
 603
 604 cleanup:
 605         kfree(buf);
 606         return ret;
 607 }
 608
 609 static int cxacru_card_status(struct cxacru_data *instance)
 610 {
 611         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 612         if (ret < 0) {          /* firmware not loaded */
 613                 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
 614                 return ret;
 615         }
 616         return 0;
 617 }
 618
 619 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 620                 struct atm_dev *atm_dev)
 621 {
 622         struct usb_interface *intf = usbatm_instance->usb_intf;
 623
 624         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 625                 device_remove_file(&intf->dev, &dev_attr_##_name);
 626         CXACRU_ALL_FILES(REMOVE);
 627         #undef CXACRU_DEVICE_REMOVE_FILE
 628 }
 629
 630 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 631                 struct atm_dev *atm_dev)
 632 {
 633         struct cxacru_data *instance = usbatm_instance->driver_data;
 634         struct usb_interface *intf = usbatm_instance->usb_intf;
 635         /*
 636         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 637         */
 638         int ret;
 639         int start_polling = 1;
 640
 641         dbg("cxacru_atm_start");
 642
 643         /* Read MAC address */
 644         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 645                         atm_dev->esi, sizeof(atm_dev->esi));
 646         if (ret < 0) {
 647                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 648                 return ret;
 649         }
 650
 651         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 652                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 653                 if (unlikely(ret)) \
 654                         goto fail_sysfs;
 655         CXACRU_ALL_FILES(CREATE);
 656         #undef CXACRU_DEVICE_CREATE_FILE
 657
 658         /* start ADSL */
 659         mutex_lock(&instance->adsl_state_serialize);
 660         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 661         if (ret < 0)
 662                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 663
 664         /* Start status polling */
 665         mutex_lock(&instance->poll_state_serialize);
 666         switch (instance->poll_state) {
 667         case CXPOLL_STOPPED:
 668                 /* start polling */
 669                 instance->poll_state = CXPOLL_POLLING;
 670                 break;
 671
 672         case CXPOLL_STOPPING:
 673                 /* abort stop request */
 674                 instance->poll_state = CXPOLL_POLLING;
 675         case CXPOLL_POLLING:
 676         case CXPOLL_SHUTDOWN:
 677                 /* don't start polling */
 678                 start_polling = 0;
 679         }
 680         mutex_unlock(&instance->poll_state_serialize);
 681         mutex_unlock(&instance->adsl_state_serialize);
 682
 683         if (start_polling)
 684                 cxacru_poll_status(&instance->poll_work.work);
 685         return 0;
 686
 687 fail_sysfs:
 688         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 689         cxacru_remove_device_files(usbatm_instance, atm_dev);
 690         return ret;
 691 }
 692
 693 static void cxacru_poll_status(struct work_struct *work)
 694 {
 695         struct cxacru_data *instance =
 696                 container_of(work, struct cxacru_data, poll_work.work);
 697         u32 buf[CXINF_MAX] = {};
 698         struct usbatm_data *usbatm = instance->usbatm;
 699         struct atm_dev *atm_dev = usbatm->atm_dev;
 700         int keep_polling = 1;
 701         int ret;
 702
 703         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 704         if (ret < 0) {
 705                 if (ret != -ESHUTDOWN)
 706                         atm_warn(usbatm, "poll status: error %d\n", ret);
 707
 708                 mutex_lock(&instance->poll_state_serialize);
 709                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 710                         instance->poll_state = CXPOLL_STOPPED;
 711
 712                         if (ret != -ESHUTDOWN)
 713                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 714                                                 " to 'start' or 'poll' to resume\n");
 715                 }
 716                 mutex_unlock(&instance->poll_state_serialize);
 717                 goto reschedule;
 718         }
 719
 720         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 721
 722         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 723                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 724
 725                 switch (instance->adsl_status) {
 726                 case 0:
 727                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 728                         break;
 729
 730                 case 1:
 731                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 732                         break;
 733
 734                 default:
 735                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 736                         break;
 737                 }
 738         }
 739
 740         if (instance->line_status == buf[CXINF_LINE_STATUS])
 741                 goto reschedule;
 742
 743         instance->line_status = buf[CXINF_LINE_STATUS];
 744         switch (instance->line_status) {
 745         case 0:
 746                 atm_dev->signal = ATM_PHY_SIG_LOST;
 747                 atm_info(usbatm, "ADSL line: down\n");
 748                 break;
 749
 750         case 1:
 751                 atm_dev->signal = ATM_PHY_SIG_LOST;
 752                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 753                 break;
 754
 755         case 2:
 756                 atm_dev->signal = ATM_PHY_SIG_LOST;
 757                 atm_info(usbatm, "ADSL line: training\n");
 758                 break;
 759
 760         case 3:
 761                 atm_dev->signal = ATM_PHY_SIG_LOST;
 762                 atm_info(usbatm, "ADSL line: channel analysis\n");
 763                 break;
 764
 765         case 4:
 766                 atm_dev->signal = ATM_PHY_SIG_LOST;
 767                 atm_info(usbatm, "ADSL line: exchange\n");
 768                 break;
 769
 770         case 5:
 771                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 772                 atm_dev->signal = ATM_PHY_SIG_FOUND;
 773
 774                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 775                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 776                 break;
 777
 778         case 6:
 779                 atm_dev->signal = ATM_PHY_SIG_LOST;
 780                 atm_info(usbatm, "ADSL line: waiting\n");
 781                 break;
 782
 783         case 7:
 784                 atm_dev->signal = ATM_PHY_SIG_LOST;
 785                 atm_info(usbatm, "ADSL line: initializing\n");
 786                 break;
 787
 788         default:
 789                 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 790                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 791                 break;
 792         }
 793 reschedule:
 794
 795         mutex_lock(&instance->poll_state_serialize);
 796         if (instance->poll_state == CXPOLL_STOPPING &&
 797                                 instance->adsl_status == 1 && /* stopped */
 798                                 instance->line_status == 0) /* down */
 799                 instance->poll_state = CXPOLL_STOPPED;
 800
 801         if (instance->poll_state == CXPOLL_STOPPED)
 802                 keep_polling = 0;
 803         mutex_unlock(&instance->poll_state_serialize);
 804
 805         if (keep_polling)
 806                 schedule_delayed_work(&instance->poll_work,
 807                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 808 }
 809
 810 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 811                      u8 code1, u8 code2, u32 addr, u8 *data, int size)
 812 {
 813         int ret;
 814         u8 *buf;
 815         int offd, offb;
 816         const int stride = CMD_PACKET_SIZE - 8;
 817
 818         buf = (u8 *) __get_free_page(GFP_KERNEL);
 819         if (!buf)
 820                 return -ENOMEM;
 821
 822         offb = offd = 0;
 823         do {
 824                 int l = min_t(int, stride, size - offd);
 825                 buf[offb++] = fw;
 826                 buf[offb++] = l;
 827                 buf[offb++] = code1;
 828                 buf[offb++] = code2;
 829                 *((u32 *) (buf + offb)) = cpu_to_le32(addr);
 830                 offb += 4;
 831                 addr += l;
 832                 if(l)
 833                         memcpy(buf + offb, data + offd, l);
 834                 if (l < stride)
 835                         memset(buf + offb + l, 0, stride - l);
 836                 offb += stride;
 837                 offd += stride;
 838                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 839                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 840                                            buf, offb, NULL, CMD_TIMEOUT);
 841                         if (ret < 0) {
 842                                 dbg("sending fw %#x failed", fw);
 843                                 goto cleanup;
 844                         }
 845                         offb = 0;
 846                 }
 847         } while(offd < size);
 848         dbg("sent fw %#x", fw);
 849
 850         ret = 0;
 851
 852 cleanup:
 853         free_page((unsigned long) buf);
 854         return ret;
 855 }
 856
 857 static void cxacru_upload_firmware(struct cxacru_data *instance,
 858                                    const struct firmware *fw,
 859                                    const struct firmware *bp,
 860                                    const struct firmware *cf)
 861 {
 862         int ret;
 863         int off;
 864         struct usbatm_data *usbatm = instance->usbatm;
 865         struct usb_device *usb_dev = usbatm->usb_dev;
 866         u16 signature[] = { usb_dev->descriptor.idVendor, usb_dev->descriptor.idProduct };
 867         u32 val;
 868
 869         dbg("cxacru_upload_firmware");
 870
 871         /* FirmwarePllFClkValue */
 872         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 873         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 874         if (ret) {
 875                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
 876                 return;
 877         }
 878
 879         /* FirmwarePllBClkValue */
 880         val = cpu_to_le32(instance->modem_type->pll_b_clk);
 881         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
 882         if (ret) {
 883                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
 884                 return;
 885         }
 886
 887         /* Enable SDRAM */
 888         val = cpu_to_le32(SDRAM_ENA);
 889         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
 890         if (ret) {
 891                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
 892                 return;
 893         }
 894
 895         /* Firmware */
 896         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
 897         if (ret) {
 898                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
 899                 return;
 900         }
 901
 902         /* Boot ROM patch */
 903         if (instance->modem_type->boot_rom_patch) {
 904                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
 905                 if (ret) {
 906                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
 907                         return;
 908                 }
 909         }
 910
 911         /* Signature */
 912         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
 913         if (ret) {
 914                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
 915                 return;
 916         }
 917
 918         if (instance->modem_type->boot_rom_patch) {
 919                 val = cpu_to_le32(BR_ADDR);
 920                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
 921         }
 922         else {
 923                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
 924         }
 925         if (ret) {
 926                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
 927                 return;
 928         }
 929
 930         /* Delay to allow firmware to start up. */
 931         msleep_interruptible(1000);
 932
 933         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
 934         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
 935         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
 936         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
 937
 938         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 939         if (ret < 0) {
 940                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
 941                 return;
 942         }
 943
 944         /* Load config data (le32), doing one packet at a time */
 945         if (cf)
 946                 for (off = 0; off < cf->size / 4; ) {
 947                         u32 buf[CMD_PACKET_SIZE / 4 - 1];
 948                         int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
 949                         buf[0] = cpu_to_le32(len);
 950                         for (i = 0; i < len; i++, off++) {
 951                                 buf[i * 2 + 1] = cpu_to_le32(off);
 952                                 memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
 953                         }
 954                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 955                                         (u8 *) buf, len, NULL, 0);
 956                         if (ret < 0) {
 957                                 usb_err(usbatm, "load config data failed: %d\n", ret);
 958                                 return;
 959                         }
 960                 }
 961
 962         msleep_interruptible(4000);
 963 }
 964
 965 static int cxacru_find_firmware(struct cxacru_data *instance,
 966                                 char* phase, const struct firmware **fw_p)
 967 {
 968         struct usbatm_data *usbatm = instance->usbatm;
 969         struct device *dev = &usbatm->usb_intf->dev;
 970         char buf[16];
 971
 972         sprintf(buf, "cxacru-%s.bin", phase);
 973         dbg("cxacru_find_firmware: looking for %s", buf);
 974
 975         if (request_firmware(fw_p, buf, dev)) {
 976                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
 977                 return -ENOENT;
 978         }
 979
 980         usb_info(usbatm, "found firmware %s\n", buf);
 981
 982         return 0;
 983 }
 984
 985 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
 986                              struct usb_interface *usb_intf)
 987 {
 988         const struct firmware *fw, *bp, *cf;
 989         struct cxacru_data *instance = usbatm_instance->driver_data;
 990
 991         int ret = cxacru_find_firmware(instance, "fw", &fw);
 992         if (ret) {
 993                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
 994                 return ret;
 995         }
 996
 997         if (instance->modem_type->boot_rom_patch) {
 998                 ret = cxacru_find_firmware(instance, "bp", &bp);
 999                 if (ret) {
1000                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1001                         release_firmware(fw);
1002                         return ret;
1003                 }
1004         }
1005
1006         if (cxacru_find_firmware(instance, "cf", &cf))          /* optional */
1007                 cf = NULL;
1008
1009         cxacru_upload_firmware(instance, fw, bp, cf);
1010
1011         if (cf)
1012                 release_firmware(cf);
1013         if (instance->modem_type->boot_rom_patch)
1014                 release_firmware(bp);
1015         release_firmware(fw);
1016
1017         ret = cxacru_card_status(instance);
1018         if (ret)
1019                 dbg("modem initialisation failed");
1020         else
1021                 dbg("done setting up the modem");
1022
1023         return ret;
1024 }
1025
1026 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1027                        struct usb_interface *intf, const struct usb_device_id *id)
1028 {
1029         struct cxacru_data *instance;
1030         struct usb_device *usb_dev = interface_to_usbdev(intf);
1031         int ret;
1032
1033         /* instance init */
1034         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1035         if (!instance) {
1036                 dbg("cxacru_bind: no memory for instance data");
1037                 return -ENOMEM;
1038         }
1039
1040         instance->usbatm = usbatm_instance;
1041         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1042         memset(instance->card_info, 0, sizeof(instance->card_info));
1043
1044         mutex_init(&instance->poll_state_serialize);
1045         instance->poll_state = CXPOLL_STOPPED;
1046         instance->line_status = -1;
1047         instance->adsl_status = -1;
1048
1049         mutex_init(&instance->adsl_state_serialize);
1050
1051         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1052         if (!instance->rcv_buf) {
1053                 dbg("cxacru_bind: no memory for rcv_buf");
1054                 ret = -ENOMEM;
1055                 goto fail;
1056         }
1057         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1058         if (!instance->snd_buf) {
1059                 dbg("cxacru_bind: no memory for snd_buf");
1060                 ret = -ENOMEM;
1061                 goto fail;
1062         }
1063         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1064         if (!instance->rcv_urb) {
1065                 dbg("cxacru_bind: no memory for rcv_urb");
1066                 ret = -ENOMEM;
1067                 goto fail;
1068         }
1069         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1070         if (!instance->snd_urb) {
1071                 dbg("cxacru_bind: no memory for snd_urb");
1072                 ret = -ENOMEM;
1073                 goto fail;
1074         }
1075
1076         usb_fill_int_urb(instance->rcv_urb,
1077                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1078                         instance->rcv_buf, PAGE_SIZE,
1079                         cxacru_blocking_completion, &instance->rcv_done, 1);
1080
1081         usb_fill_int_urb(instance->snd_urb,
1082                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1083                         instance->snd_buf, PAGE_SIZE,
1084                         cxacru_blocking_completion, &instance->snd_done, 4);
1085
1086         mutex_init(&instance->cm_serialize);
1087
1088         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1089
1090         usbatm_instance->driver_data = instance;
1091
1092         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1093
1094         return 0;
1095
1096  fail:
1097         free_page((unsigned long) instance->snd_buf);
1098         free_page((unsigned long) instance->rcv_buf);
1099         usb_free_urb(instance->snd_urb);
1100         usb_free_urb(instance->rcv_urb);
1101         kfree(instance);
1102
1103         return ret;
1104 }
1105
1106 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1107                 struct usb_interface *intf)
1108 {
1109         struct cxacru_data *instance = usbatm_instance->driver_data;
1110         int is_polling = 1;
1111
1112         dbg("cxacru_unbind entered");
1113
1114         if (!instance) {
1115                 dbg("cxacru_unbind: NULL instance!");
1116                 return;
1117         }
1118
1119         mutex_lock(&instance->poll_state_serialize);
1120         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1121
1122         /* ensure that status polling continues unless
1123          * it has already stopped */
1124         if (instance->poll_state == CXPOLL_STOPPED)
1125                 is_polling = 0;
1126
1127         /* stop polling from being stopped or started */
1128         instance->poll_state = CXPOLL_SHUTDOWN;
1129         mutex_unlock(&instance->poll_state_serialize);
1130
1131         if (is_polling)
1132                 cancel_rearming_delayed_work(&instance->poll_work);
1133
1134         usb_kill_urb(instance->snd_urb);
1135         usb_kill_urb(instance->rcv_urb);
1136         usb_free_urb(instance->snd_urb);
1137         usb_free_urb(instance->rcv_urb);
1138
1139         free_page((unsigned long) instance->snd_buf);
1140         free_page((unsigned long) instance->rcv_buf);
1141
1142         kfree(instance);
1143
1144         usbatm_instance->driver_data = NULL;
1145 }
1146
1147 static const struct cxacru_modem_type cxacru_cafe = {
1148         .pll_f_clk = 0x02d874df,
1149         .pll_b_clk = 0x0196a51a,
1150         .boot_rom_patch = 1,
1151 };
1152
1153 static const struct cxacru_modem_type cxacru_cb00 = {
1154         .pll_f_clk = 0x5,
1155         .pll_b_clk = 0x3,
1156         .boot_rom_patch = 0,
1157 };
1158
1159 static const struct usb_device_id cxacru_usb_ids[] = {
1160         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1161                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1162         },
1163         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1164                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1165         },
1166         { /* V = Conexant                       P = ADSL modem                          */
1167                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1168         },
1169         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1170                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1171         },
1172         { /* V = Conexant                       P = ADSL modem                          */
1173                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1174         },
1175         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1176                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1177         },
1178         { /* V = Olitec                         P = ADSL modem version 2                */
1179                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1180         },
1181         { /* V = Olitec                         P = ADSL modem version 3                */
1182                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1183         },
1184         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1185                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1186         },
1187         { /* V = Zoom                           P = 5510                                */
1188                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1189         },
1190         { /* V = Draytek                        P = Vigor 318                           */
1191                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1192         },
1193         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1194                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1195         },
1196         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1197                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1198         },
1199         { /* V = Aethra                         P = Starmodem UM1020                    */
1200                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1201         },
1202         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1203                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1204         },
1205         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1206                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1207         },
1208         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1209                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1210         },
1211         {}
1212 };
1213
1214 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1215
1216 static struct usbatm_driver cxacru_driver = {
1217         .driver_name    = cxacru_driver_name,
1218         .bind           = cxacru_bind,
1219         .heavy_init     = cxacru_heavy_init,
1220         .unbind         = cxacru_unbind,
1221         .atm_start      = cxacru_atm_start,
1222         .atm_stop       = cxacru_remove_device_files,
1223         .bulk_in        = CXACRU_EP_DATA,
1224         .bulk_out       = CXACRU_EP_DATA,
1225         .rx_padding     = 3,
1226         .tx_padding     = 11,
1227 };
1228
1229 static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1230 {
1231         return usbatm_usb_probe(intf, id, &cxacru_driver);
1232 }
1233
1234 static struct usb_driver cxacru_usb_driver = {
1235         .name           = cxacru_driver_name,
1236         .probe          = cxacru_usb_probe,
1237         .disconnect     = usbatm_usb_disconnect,
1238         .id_table       = cxacru_usb_ids
1239 };
1240
1241 static int __init cxacru_init(void)
1242 {
1243         return usb_register(&cxacru_usb_driver);
1244 }
1245
1246 static void __exit cxacru_cleanup(void)
1247 {
1248         usb_deregister(&cxacru_usb_driver);
1249 }
1250
1251 module_init(cxacru_init);
1252 module_exit(cxacru_cleanup);
1253
1254 MODULE_AUTHOR(DRIVER_AUTHOR);
1255 MODULE_DESCRIPTION(DRIVER_DESC);
1256 MODULE_LICENSE("GPL");
1257 MODULE_VERSION(DRIVER_VERSION);