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         if (likely(value >= 0)) {
 231                 return snprintf(buf, PAGE_SIZE, "%u.%02u\n",
 232                                         value / 100, value % 100);
 233         } else {
 234                 value = -value;
 235                 return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",
 236                                         value / 100, value % 100);
 237         }
 238 }
 239
 240 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 241 {
 242         static char *str[] = { "no", "yes" };
 243         if (unlikely(value >= ARRAY_SIZE(str)))
 244                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 245         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 246 }
 247
 248 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 249 {
 250         static char *str[] = { NULL, "not connected", "connected", "lost" };
 251         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 252                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 253         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 254 }
 255
 256 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 257 {
 258         static char *str[] = { "down", "attempting to activate",
 259                 "training", "channel analysis", "exchange", "up",
 260                 "waiting", "initialising"
 261         };
 262         if (unlikely(value >= ARRAY_SIZE(str)))
 263                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 264         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 265 }
 266
 267 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 268 {
 269         static char *str[] = {
 270                         NULL,
 271                         "ANSI T1.413",
 272                         "ITU-T G.992.1 (G.DMT)",
 273                         "ITU-T G.992.2 (G.LITE)"
 274         };
 275         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 276                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 277         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 278 }
 279
 280 /*
 281  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 282  * this data is already in atm_dev there's no point.
 283  *
 284  * MAC_ADDRESS_HIGH = 0x????5544
 285  * MAC_ADDRESS_LOW  = 0x33221100
 286  * Where 00-55 are bytes 0-5 of the MAC.
 287  */
 288 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
 289         struct device_attribute *attr, char *buf)
 290 {
 291         struct usb_interface *intf = to_usb_interface(dev);
 292         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 293         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 294
 295         return snprintf(buf, PAGE_SIZE, "%pM\n", atm_dev->esi);
 296 }
 297
 298 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
 299         struct device_attribute *attr, char *buf)
 300 {
 301         struct usb_interface *intf = to_usb_interface(dev);
 302         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 303         struct cxacru_data *instance = usbatm_instance->driver_data;
 304         u32 value = instance->card_info[CXINF_LINE_STARTABLE];
 305
 306         static char *str[] = { "running", "stopped" };
 307         if (unlikely(value >= ARRAY_SIZE(str)))
 308                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 309         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 310 }
 311
 312 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
 313         struct device_attribute *attr, const char *buf, size_t count)
 314 {
 315         struct usb_interface *intf = to_usb_interface(dev);
 316         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 317         struct cxacru_data *instance = usbatm_instance->driver_data;
 318         int ret;
 319         int poll = -1;
 320         char str_cmd[8];
 321         int len = strlen(buf);
 322
 323         if (!capable(CAP_NET_ADMIN))
 324                 return -EACCES;
 325
 326         ret = sscanf(buf, "%7s", str_cmd);
 327         if (ret != 1)
 328                 return -EINVAL;
 329         ret = 0;
 330
 331         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 332                 return -ERESTARTSYS;
 333
 334         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 335                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 336                 if (ret < 0) {
 337                         atm_err(usbatm_instance, "change adsl state:"
 338                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 339
 340                         ret = -EIO;
 341                 } else {
 342                         ret = len;
 343                         poll = CXPOLL_STOPPED;
 344                 }
 345         }
 346
 347         /* Line status is only updated every second
 348          * and the device appears to only react to
 349          * START/STOP every second too. Wait 1.5s to
 350          * be sure that restart will have an effect. */
 351         if (!strcmp(str_cmd, "restart"))
 352                 msleep(1500);
 353
 354         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 355                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 356                 if (ret < 0) {
 357                         atm_err(usbatm_instance, "change adsl state:"
 358                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 359
 360                         ret = -EIO;
 361                 } else {
 362                         ret = len;
 363                         poll = CXPOLL_POLLING;
 364                 }
 365         }
 366
 367         if (!strcmp(str_cmd, "poll")) {
 368                 ret = len;
 369                 poll = CXPOLL_POLLING;
 370         }
 371
 372         if (ret == 0) {
 373                 ret = -EINVAL;
 374                 poll = -1;
 375         }
 376
 377         if (poll == CXPOLL_POLLING) {
 378                 mutex_lock(&instance->poll_state_serialize);
 379                 switch (instance->poll_state) {
 380                 case CXPOLL_STOPPED:
 381                         /* start polling */
 382                         instance->poll_state = CXPOLL_POLLING;
 383                         break;
 384
 385                 case CXPOLL_STOPPING:
 386                         /* abort stop request */
 387                         instance->poll_state = CXPOLL_POLLING;
 388                 case CXPOLL_POLLING:
 389                 case CXPOLL_SHUTDOWN:
 390                         /* don't start polling */
 391                         poll = -1;
 392                 }
 393                 mutex_unlock(&instance->poll_state_serialize);
 394         } else if (poll == CXPOLL_STOPPED) {
 395                 mutex_lock(&instance->poll_state_serialize);
 396                 /* request stop */
 397                 if (instance->poll_state == CXPOLL_POLLING)
 398                         instance->poll_state = CXPOLL_STOPPING;
 399                 mutex_unlock(&instance->poll_state_serialize);
 400         }
 401
 402         mutex_unlock(&instance->adsl_state_serialize);
 403
 404         if (poll == CXPOLL_POLLING)
 405                 cxacru_poll_status(&instance->poll_work.work);
 406
 407         return ret;
 408 }
 409
 410 /*
 411  * All device attributes are included in CXACRU_ALL_FILES
 412  * so that the same list can be used multiple times:
 413  *     INIT   (define the device attributes)
 414  *     CREATE (create all the device files)
 415  *     REMOVE (remove all the device files)
 416  *
 417  * With the last two being defined as needed in the functions
 418  * they are used in before calling CXACRU_ALL_FILES()
 419  */
 420 #define CXACRU_ALL_FILES(_action) \
 421 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 422 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 423 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 424 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 425 CXACRU__ATTR_##_action(                                      mac_address); \
 426 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 427 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 428 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 429 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 430 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 431 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 432 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 433 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 434 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 435 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 436 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 437 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 438 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 439 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 440 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 441 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 442 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 443 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 444 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 445 CXACRU_CMD_##_action(                                        adsl_state);
 446
 447 CXACRU_ALL_FILES(INIT);
 448
 449 /* the following three functions are stolen from drivers/usb/core/message.c */
 450 static void cxacru_blocking_completion(struct urb *urb)
 451 {
 452         complete(urb->context);
 453 }
 454
 455 static void cxacru_timeout_kill(unsigned long data)
 456 {
 457         usb_unlink_urb((struct urb *) data);
 458 }
 459
 460 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 461                                  int* actual_length)
 462 {
 463         struct timer_list timer;
 464
 465         init_timer(&timer);
 466         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
 467         timer.data = (unsigned long) urb;
 468         timer.function = cxacru_timeout_kill;
 469         add_timer(&timer);
 470         wait_for_completion(done);
 471         del_timer_sync(&timer);
 472
 473         if (actual_length)
 474                 *actual_length = urb->actual_length;
 475         return urb->status; /* must read status after completion */
 476 }
 477
 478 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 479                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 480 {
 481         int ret, actlen;
 482         int offb, offd;
 483         const int stride = CMD_PACKET_SIZE - 4;
 484         u8 *wbuf = instance->snd_buf;
 485         u8 *rbuf = instance->rcv_buf;
 486         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 487         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 488
 489         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 490                 if (printk_ratelimit())
 491                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
 492                                 wbuflen, rbuflen);
 493                 ret = -ENOMEM;
 494                 goto err;
 495         }
 496
 497         mutex_lock(&instance->cm_serialize);
 498
 499         /* submit reading urb before the writing one */
 500         init_completion(&instance->rcv_done);
 501         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 502         if (ret < 0) {
 503                 if (printk_ratelimit())
 504                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
 505                                 cm, ret);
 506                 goto fail;
 507         }
 508
 509         memset(wbuf, 0, wbuflen);
 510         /* handle wsize == 0 */
 511         wbuf[0] = cm;
 512         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 513                 wbuf[offb] = cm;
 514                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 515         }
 516
 517         instance->snd_urb->transfer_buffer_length = wbuflen;
 518         init_completion(&instance->snd_done);
 519         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 520         if (ret < 0) {
 521                 if (printk_ratelimit())
 522                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
 523                                 cm, ret);
 524                 goto fail;
 525         }
 526
 527         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 528         if (ret < 0) {
 529                 if (printk_ratelimit())
 530                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
 531                 goto fail;
 532         }
 533
 534         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 535         if (ret < 0) {
 536                 if (printk_ratelimit())
 537                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
 538                 goto fail;
 539         }
 540         if (actlen % CMD_PACKET_SIZE || !actlen) {
 541                 if (printk_ratelimit())
 542                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
 543                                 cm, actlen);
 544                 ret = -EIO;
 545                 goto fail;
 546         }
 547
 548         /* check the return status and copy the data to the output buffer, if needed */
 549         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 550                 if (rbuf[offb] != cm) {
 551                         if (printk_ratelimit())
 552                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
 553                                         rbuf[offb], cm);
 554                         ret = -EIO;
 555                         goto fail;
 556                 }
 557                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 558                         if (printk_ratelimit())
 559                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
 560                                         cm, rbuf[offb + 1]);
 561                         ret = -EIO;
 562                         goto fail;
 563                 }
 564                 if (offd >= rsize)
 565                         break;
 566                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 567                 offd += stride;
 568         }
 569
 570         ret = offd;
 571         dbg("cm %#x", cm);
 572 fail:
 573         mutex_unlock(&instance->cm_serialize);
 574 err:
 575         return ret;
 576 }
 577
 578 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 579                                u32 *data, int size)
 580 {
 581         int ret, len;
 582         __le32 *buf;
 583         int offb, offd;
 584         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 585         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 586
 587         buf = kmalloc(buflen, GFP_KERNEL);
 588         if (!buf)
 589                 return -ENOMEM;
 590
 591         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 592         if (ret < 0)
 593                 goto cleanup;
 594
 595         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 596         len = ret / 4;
 597         for (offb = 0; offb < len; ) {
 598                 int l = le32_to_cpu(buf[offb++]);
 599                 if (l > stride || l > (len - offb) / 2) {
 600                         if (printk_ratelimit())
 601                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
 602                                         cm, l);
 603                         ret = -EIO;
 604                         goto cleanup;
 605                 }
 606                 while (l--) {
 607                         offd = le32_to_cpu(buf[offb++]);
 608                         if (offd >= size) {
 609                                 if (printk_ratelimit())
 610                                         usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
 611                                                 offd, cm);
 612                                 ret = -EIO;
 613                                 goto cleanup;
 614                         }
 615                         data[offd] = le32_to_cpu(buf[offb++]);
 616                 }
 617         }
 618
 619         ret = 0;
 620
 621 cleanup:
 622         kfree(buf);
 623         return ret;
 624 }
 625
 626 static int cxacru_card_status(struct cxacru_data *instance)
 627 {
 628         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 629         if (ret < 0) {          /* firmware not loaded */
 630                 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
 631                 return ret;
 632         }
 633         return 0;
 634 }
 635
 636 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 637                 struct atm_dev *atm_dev)
 638 {
 639         struct usb_interface *intf = usbatm_instance->usb_intf;
 640
 641         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 642                 device_remove_file(&intf->dev, &dev_attr_##_name);
 643         CXACRU_ALL_FILES(REMOVE);
 644         #undef CXACRU_DEVICE_REMOVE_FILE
 645 }
 646
 647 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 648                 struct atm_dev *atm_dev)
 649 {
 650         struct cxacru_data *instance = usbatm_instance->driver_data;
 651         struct usb_interface *intf = usbatm_instance->usb_intf;
 652         /*
 653         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 654         */
 655         int ret;
 656         int start_polling = 1;
 657
 658         dbg("cxacru_atm_start");
 659
 660         /* Read MAC address */
 661         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 662                         atm_dev->esi, sizeof(atm_dev->esi));
 663         if (ret < 0) {
 664                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 665                 return ret;
 666         }
 667
 668         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 669                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 670                 if (unlikely(ret)) \
 671                         goto fail_sysfs;
 672         CXACRU_ALL_FILES(CREATE);
 673         #undef CXACRU_DEVICE_CREATE_FILE
 674
 675         /* start ADSL */
 676         mutex_lock(&instance->adsl_state_serialize);
 677         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 678         if (ret < 0)
 679                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 680
 681         /* Start status polling */
 682         mutex_lock(&instance->poll_state_serialize);
 683         switch (instance->poll_state) {
 684         case CXPOLL_STOPPED:
 685                 /* start polling */
 686                 instance->poll_state = CXPOLL_POLLING;
 687                 break;
 688
 689         case CXPOLL_STOPPING:
 690                 /* abort stop request */
 691                 instance->poll_state = CXPOLL_POLLING;
 692         case CXPOLL_POLLING:
 693         case CXPOLL_SHUTDOWN:
 694                 /* don't start polling */
 695                 start_polling = 0;
 696         }
 697         mutex_unlock(&instance->poll_state_serialize);
 698         mutex_unlock(&instance->adsl_state_serialize);
 699
 700         if (start_polling)
 701                 cxacru_poll_status(&instance->poll_work.work);
 702         return 0;
 703
 704 fail_sysfs:
 705         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 706         cxacru_remove_device_files(usbatm_instance, atm_dev);
 707         return ret;
 708 }
 709
 710 static void cxacru_poll_status(struct work_struct *work)
 711 {
 712         struct cxacru_data *instance =
 713                 container_of(work, struct cxacru_data, poll_work.work);
 714         u32 buf[CXINF_MAX] = {};
 715         struct usbatm_data *usbatm = instance->usbatm;
 716         struct atm_dev *atm_dev = usbatm->atm_dev;
 717         int keep_polling = 1;
 718         int ret;
 719
 720         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 721         if (ret < 0) {
 722                 if (ret != -ESHUTDOWN)
 723                         atm_warn(usbatm, "poll status: error %d\n", ret);
 724
 725                 mutex_lock(&instance->poll_state_serialize);
 726                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 727                         instance->poll_state = CXPOLL_STOPPED;
 728
 729                         if (ret != -ESHUTDOWN)
 730                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 731                                                 " to 'start' or 'poll' to resume\n");
 732                 }
 733                 mutex_unlock(&instance->poll_state_serialize);
 734                 goto reschedule;
 735         }
 736
 737         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 738
 739         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 740                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 741
 742                 switch (instance->adsl_status) {
 743                 case 0:
 744                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 745                         break;
 746
 747                 case 1:
 748                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 749                         break;
 750
 751                 default:
 752                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 753                         break;
 754                 }
 755         }
 756
 757         if (instance->line_status == buf[CXINF_LINE_STATUS])
 758                 goto reschedule;
 759
 760         instance->line_status = buf[CXINF_LINE_STATUS];
 761         switch (instance->line_status) {
 762         case 0:
 763                 atm_dev->signal = ATM_PHY_SIG_LOST;
 764                 atm_info(usbatm, "ADSL line: down\n");
 765                 break;
 766
 767         case 1:
 768                 atm_dev->signal = ATM_PHY_SIG_LOST;
 769                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 770                 break;
 771
 772         case 2:
 773                 atm_dev->signal = ATM_PHY_SIG_LOST;
 774                 atm_info(usbatm, "ADSL line: training\n");
 775                 break;
 776
 777         case 3:
 778                 atm_dev->signal = ATM_PHY_SIG_LOST;
 779                 atm_info(usbatm, "ADSL line: channel analysis\n");
 780                 break;
 781
 782         case 4:
 783                 atm_dev->signal = ATM_PHY_SIG_LOST;
 784                 atm_info(usbatm, "ADSL line: exchange\n");
 785                 break;
 786
 787         case 5:
 788                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 789                 atm_dev->signal = ATM_PHY_SIG_FOUND;
 790
 791                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 792                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 793                 break;
 794
 795         case 6:
 796                 atm_dev->signal = ATM_PHY_SIG_LOST;
 797                 atm_info(usbatm, "ADSL line: waiting\n");
 798                 break;
 799
 800         case 7:
 801                 atm_dev->signal = ATM_PHY_SIG_LOST;
 802                 atm_info(usbatm, "ADSL line: initializing\n");
 803                 break;
 804
 805         default:
 806                 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 807                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 808                 break;
 809         }
 810 reschedule:
 811
 812         mutex_lock(&instance->poll_state_serialize);
 813         if (instance->poll_state == CXPOLL_STOPPING &&
 814                                 instance->adsl_status == 1 && /* stopped */
 815                                 instance->line_status == 0) /* down */
 816                 instance->poll_state = CXPOLL_STOPPED;
 817
 818         if (instance->poll_state == CXPOLL_STOPPED)
 819                 keep_polling = 0;
 820         mutex_unlock(&instance->poll_state_serialize);
 821
 822         if (keep_polling)
 823                 schedule_delayed_work(&instance->poll_work,
 824                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 825 }
 826
 827 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 828                      u8 code1, u8 code2, u32 addr, const u8 *data, int size)
 829 {
 830         int ret;
 831         u8 *buf;
 832         int offd, offb;
 833         const int stride = CMD_PACKET_SIZE - 8;
 834
 835         buf = (u8 *) __get_free_page(GFP_KERNEL);
 836         if (!buf)
 837                 return -ENOMEM;
 838
 839         offb = offd = 0;
 840         do {
 841                 int l = min_t(int, stride, size - offd);
 842                 buf[offb++] = fw;
 843                 buf[offb++] = l;
 844                 buf[offb++] = code1;
 845                 buf[offb++] = code2;
 846                 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
 847                 offb += 4;
 848                 addr += l;
 849                 if(l)
 850                         memcpy(buf + offb, data + offd, l);
 851                 if (l < stride)
 852                         memset(buf + offb + l, 0, stride - l);
 853                 offb += stride;
 854                 offd += stride;
 855                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 856                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 857                                            buf, offb, NULL, CMD_TIMEOUT);
 858                         if (ret < 0) {
 859                                 dbg("sending fw %#x failed", fw);
 860                                 goto cleanup;
 861                         }
 862                         offb = 0;
 863                 }
 864         } while(offd < size);
 865         dbg("sent fw %#x", fw);
 866
 867         ret = 0;
 868
 869 cleanup:
 870         free_page((unsigned long) buf);
 871         return ret;
 872 }
 873
 874 static void cxacru_upload_firmware(struct cxacru_data *instance,
 875                                    const struct firmware *fw,
 876                                    const struct firmware *bp,
 877                                    const struct firmware *cf)
 878 {
 879         int ret;
 880         int off;
 881         struct usbatm_data *usbatm = instance->usbatm;
 882         struct usb_device *usb_dev = usbatm->usb_dev;
 883         __le16 signature[] = { usb_dev->descriptor.idVendor,
 884                                usb_dev->descriptor.idProduct };
 885         __le32 val;
 886
 887         dbg("cxacru_upload_firmware");
 888
 889         /* FirmwarePllFClkValue */
 890         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 891         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 892         if (ret) {
 893                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
 894                 return;
 895         }
 896
 897         /* FirmwarePllBClkValue */
 898         val = cpu_to_le32(instance->modem_type->pll_b_clk);
 899         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
 900         if (ret) {
 901                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
 902                 return;
 903         }
 904
 905         /* Enable SDRAM */
 906         val = cpu_to_le32(SDRAM_ENA);
 907         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
 908         if (ret) {
 909                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
 910                 return;
 911         }
 912
 913         /* Firmware */
 914         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
 915         if (ret) {
 916                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
 917                 return;
 918         }
 919
 920         /* Boot ROM patch */
 921         if (instance->modem_type->boot_rom_patch) {
 922                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
 923                 if (ret) {
 924                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
 925                         return;
 926                 }
 927         }
 928
 929         /* Signature */
 930         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
 931         if (ret) {
 932                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
 933                 return;
 934         }
 935
 936         if (instance->modem_type->boot_rom_patch) {
 937                 val = cpu_to_le32(BR_ADDR);
 938                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
 939         }
 940         else {
 941                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
 942         }
 943         if (ret) {
 944                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
 945                 return;
 946         }
 947
 948         /* Delay to allow firmware to start up. */
 949         msleep_interruptible(1000);
 950
 951         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
 952         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
 953         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
 954         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
 955
 956         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 957         if (ret < 0) {
 958                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
 959                 return;
 960         }
 961
 962         /* Load config data (le32), doing one packet at a time */
 963         if (cf)
 964                 for (off = 0; off < cf->size / 4; ) {
 965                         __le32 buf[CMD_PACKET_SIZE / 4 - 1];
 966                         int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
 967                         buf[0] = cpu_to_le32(len);
 968                         for (i = 0; i < len; i++, off++) {
 969                                 buf[i * 2 + 1] = cpu_to_le32(off);
 970                                 memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
 971                         }
 972                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 973                                         (u8 *) buf, len, NULL, 0);
 974                         if (ret < 0) {
 975                                 usb_err(usbatm, "load config data failed: %d\n", ret);
 976                                 return;
 977                         }
 978                 }
 979
 980         msleep_interruptible(4000);
 981 }
 982
 983 static int cxacru_find_firmware(struct cxacru_data *instance,
 984                                 char* phase, const struct firmware **fw_p)
 985 {
 986         struct usbatm_data *usbatm = instance->usbatm;
 987         struct device *dev = &usbatm->usb_intf->dev;
 988         char buf[16];
 989
 990         sprintf(buf, "cxacru-%s.bin", phase);
 991         dbg("cxacru_find_firmware: looking for %s", buf);
 992
 993         if (request_firmware(fw_p, buf, dev)) {
 994                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
 995                 return -ENOENT;
 996         }
 997
 998         usb_info(usbatm, "found firmware %s\n", buf);
 999
1000         return 0;
1001 }
1002
1003 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1004                              struct usb_interface *usb_intf)
1005 {
1006         const struct firmware *fw, *bp, *cf;
1007         struct cxacru_data *instance = usbatm_instance->driver_data;
1008
1009         int ret = cxacru_find_firmware(instance, "fw", &fw);
1010         if (ret) {
1011                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1012                 return ret;
1013         }
1014
1015         if (instance->modem_type->boot_rom_patch) {
1016                 ret = cxacru_find_firmware(instance, "bp", &bp);
1017                 if (ret) {
1018                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1019                         release_firmware(fw);
1020                         return ret;
1021                 }
1022         }
1023
1024         if (cxacru_find_firmware(instance, "cf", &cf))          /* optional */
1025                 cf = NULL;
1026
1027         cxacru_upload_firmware(instance, fw, bp, cf);
1028
1029         if (cf)
1030                 release_firmware(cf);
1031         if (instance->modem_type->boot_rom_patch)
1032                 release_firmware(bp);
1033         release_firmware(fw);
1034
1035         ret = cxacru_card_status(instance);
1036         if (ret)
1037                 dbg("modem initialisation failed");
1038         else
1039                 dbg("done setting up the modem");
1040
1041         return ret;
1042 }
1043
1044 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1045                        struct usb_interface *intf, const struct usb_device_id *id)
1046 {
1047         struct cxacru_data *instance;
1048         struct usb_device *usb_dev = interface_to_usbdev(intf);
1049         int ret;
1050
1051         /* instance init */
1052         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1053         if (!instance) {
1054                 dbg("cxacru_bind: no memory for instance data");
1055                 return -ENOMEM;
1056         }
1057
1058         instance->usbatm = usbatm_instance;
1059         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1060
1061         mutex_init(&instance->poll_state_serialize);
1062         instance->poll_state = CXPOLL_STOPPED;
1063         instance->line_status = -1;
1064         instance->adsl_status = -1;
1065
1066         mutex_init(&instance->adsl_state_serialize);
1067
1068         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1069         if (!instance->rcv_buf) {
1070                 dbg("cxacru_bind: no memory for rcv_buf");
1071                 ret = -ENOMEM;
1072                 goto fail;
1073         }
1074         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1075         if (!instance->snd_buf) {
1076                 dbg("cxacru_bind: no memory for snd_buf");
1077                 ret = -ENOMEM;
1078                 goto fail;
1079         }
1080         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1081         if (!instance->rcv_urb) {
1082                 dbg("cxacru_bind: no memory for rcv_urb");
1083                 ret = -ENOMEM;
1084                 goto fail;
1085         }
1086         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1087         if (!instance->snd_urb) {
1088                 dbg("cxacru_bind: no memory for snd_urb");
1089                 ret = -ENOMEM;
1090                 goto fail;
1091         }
1092
1093         usb_fill_int_urb(instance->rcv_urb,
1094                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1095                         instance->rcv_buf, PAGE_SIZE,
1096                         cxacru_blocking_completion, &instance->rcv_done, 1);
1097
1098         usb_fill_int_urb(instance->snd_urb,
1099                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1100                         instance->snd_buf, PAGE_SIZE,
1101                         cxacru_blocking_completion, &instance->snd_done, 4);
1102
1103         mutex_init(&instance->cm_serialize);
1104
1105         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1106
1107         usbatm_instance->driver_data = instance;
1108
1109         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1110
1111         return 0;
1112
1113  fail:
1114         free_page((unsigned long) instance->snd_buf);
1115         free_page((unsigned long) instance->rcv_buf);
1116         usb_free_urb(instance->snd_urb);
1117         usb_free_urb(instance->rcv_urb);
1118         kfree(instance);
1119
1120         return ret;
1121 }
1122
1123 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1124                 struct usb_interface *intf)
1125 {
1126         struct cxacru_data *instance = usbatm_instance->driver_data;
1127         int is_polling = 1;
1128
1129         dbg("cxacru_unbind entered");
1130
1131         if (!instance) {
1132                 dbg("cxacru_unbind: NULL instance!");
1133                 return;
1134         }
1135
1136         mutex_lock(&instance->poll_state_serialize);
1137         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1138
1139         /* ensure that status polling continues unless
1140          * it has already stopped */
1141         if (instance->poll_state == CXPOLL_STOPPED)
1142                 is_polling = 0;
1143
1144         /* stop polling from being stopped or started */
1145         instance->poll_state = CXPOLL_SHUTDOWN;
1146         mutex_unlock(&instance->poll_state_serialize);
1147
1148         if (is_polling)
1149                 cancel_rearming_delayed_work(&instance->poll_work);
1150
1151         usb_kill_urb(instance->snd_urb);
1152         usb_kill_urb(instance->rcv_urb);
1153         usb_free_urb(instance->snd_urb);
1154         usb_free_urb(instance->rcv_urb);
1155
1156         free_page((unsigned long) instance->snd_buf);
1157         free_page((unsigned long) instance->rcv_buf);
1158
1159         kfree(instance);
1160
1161         usbatm_instance->driver_data = NULL;
1162 }
1163
1164 static const struct cxacru_modem_type cxacru_cafe = {
1165         .pll_f_clk = 0x02d874df,
1166         .pll_b_clk = 0x0196a51a,
1167         .boot_rom_patch = 1,
1168 };
1169
1170 static const struct cxacru_modem_type cxacru_cb00 = {
1171         .pll_f_clk = 0x5,
1172         .pll_b_clk = 0x3,
1173         .boot_rom_patch = 0,
1174 };
1175
1176 static const struct usb_device_id cxacru_usb_ids[] = {
1177         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1178                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1179         },
1180         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1181                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1182         },
1183         { /* V = Conexant                       P = ADSL modem                          */
1184                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1185         },
1186         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1187                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1188         },
1189         { /* V = Conexant                       P = ADSL modem                          */
1190                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1191         },
1192         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1193                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1194         },
1195         { /* V = Olitec                         P = ADSL modem version 2                */
1196                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1197         },
1198         { /* V = Olitec                         P = ADSL modem version 3                */
1199                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1200         },
1201         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1202                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1203         },
1204         { /* V = Zoom                           P = 5510                                */
1205                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1206         },
1207         { /* V = Draytek                        P = Vigor 318                           */
1208                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1209         },
1210         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1211                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1212         },
1213         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1214                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1215         },
1216         { /* V = Aethra                         P = Starmodem UM1020                    */
1217                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1218         },
1219         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1220                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1221         },
1222         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1223                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1224         },
1225         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1226                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1227         },
1228         {}
1229 };
1230
1231 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1232
1233 static struct usbatm_driver cxacru_driver = {
1234         .driver_name    = cxacru_driver_name,
1235         .bind           = cxacru_bind,
1236         .heavy_init     = cxacru_heavy_init,
1237         .unbind         = cxacru_unbind,
1238         .atm_start      = cxacru_atm_start,
1239         .atm_stop       = cxacru_remove_device_files,
1240         .bulk_in        = CXACRU_EP_DATA,
1241         .bulk_out       = CXACRU_EP_DATA,
1242         .rx_padding     = 3,
1243         .tx_padding     = 11,
1244 };
1245
1246 static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1247 {
1248         return usbatm_usb_probe(intf, id, &cxacru_driver);
1249 }
1250
1251 static struct usb_driver cxacru_usb_driver = {
1252         .name           = cxacru_driver_name,
1253         .probe          = cxacru_usb_probe,
1254         .disconnect     = usbatm_usb_disconnect,
1255         .id_table       = cxacru_usb_ids
1256 };
1257
1258 static int __init cxacru_init(void)
1259 {
1260         return usb_register(&cxacru_usb_driver);
1261 }
1262
1263 static void __exit cxacru_cleanup(void)
1264 {
1265         usb_deregister(&cxacru_usb_driver);
1266 }
1267
1268 module_init(cxacru_init);
1269 module_exit(cxacru_cleanup);
1270
1271 MODULE_AUTHOR(DRIVER_AUTHOR);
1272 MODULE_DESCRIPTION(DRIVER_DESC);
1273 MODULE_LICENSE("GPL");
1274 MODULE_VERSION(DRIVER_VERSION);