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 = urb->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         del_timer_sync(&timer);
 468
 469         if (actual_length)
 470                 *actual_length = urb->actual_length;
 471         return status;
 472 }
 473
 474 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 475                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 476 {
 477         int ret, actlen;
 478         int offb, offd;
 479         const int stride = CMD_PACKET_SIZE - 4;
 480         u8 *wbuf = instance->snd_buf;
 481         u8 *rbuf = instance->rcv_buf;
 482         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 483         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 484
 485         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 486                 dbg("too big transfer requested");
 487                 ret = -ENOMEM;
 488                 goto fail;
 489         }
 490
 491         mutex_lock(&instance->cm_serialize);
 492
 493         /* submit reading urb before the writing one */
 494         init_completion(&instance->rcv_done);
 495         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 496         if (ret < 0) {
 497                 dbg("submitting read urb for cm %#x failed", cm);
 498                 ret = ret;
 499                 goto fail;
 500         }
 501
 502         memset(wbuf, 0, wbuflen);
 503         /* handle wsize == 0 */
 504         wbuf[0] = cm;
 505         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 506                 wbuf[offb] = cm;
 507                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 508         }
 509
 510         instance->snd_urb->transfer_buffer_length = wbuflen;
 511         init_completion(&instance->snd_done);
 512         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 513         if (ret < 0) {
 514                 dbg("submitting write urb for cm %#x failed", cm);
 515                 ret = ret;
 516                 goto fail;
 517         }
 518
 519         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 520         if (ret < 0) {
 521                 dbg("sending cm %#x failed", cm);
 522                 ret = ret;
 523                 goto fail;
 524         }
 525
 526         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 527         if (ret < 0) {
 528                 dbg("receiving cm %#x failed", cm);
 529                 ret = ret;
 530                 goto fail;
 531         }
 532         if (actlen % CMD_PACKET_SIZE || !actlen) {
 533                 dbg("response is not a positive multiple of %d: %#x",
 534                                 CMD_PACKET_SIZE, actlen);
 535                 ret = -EIO;
 536                 goto fail;
 537         }
 538
 539         /* check the return status and copy the data to the output buffer, if needed */
 540         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 541                 if (rbuf[offb] != cm) {
 542                         dbg("wrong cm %#x in response", rbuf[offb]);
 543                         ret = -EIO;
 544                         goto fail;
 545                 }
 546                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 547                         dbg("response failed: %#x", rbuf[offb + 1]);
 548                         ret = -EIO;
 549                         goto fail;
 550                 }
 551                 if (offd >= rsize)
 552                         break;
 553                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 554                 offd += stride;
 555         }
 556
 557         ret = offd;
 558         dbg("cm %#x", cm);
 559 fail:
 560         mutex_unlock(&instance->cm_serialize);
 561         return ret;
 562 }
 563
 564 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 565                                u32 *data, int size)
 566 {
 567         int ret, len;
 568         u32 *buf;
 569         int offb, offd;
 570         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 571         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 572
 573         buf = kmalloc(buflen, GFP_KERNEL);
 574         if (!buf)
 575                 return -ENOMEM;
 576
 577         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 578         if (ret < 0)
 579                 goto cleanup;
 580
 581         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 582         len = ret / 4;
 583         for (offb = 0; offb < len; ) {
 584                 int l = le32_to_cpu(buf[offb++]);
 585                 if (l > stride || l > (len - offb) / 2) {
 586                         dbg("wrong data length %#x in response", l);
 587                         ret = -EIO;
 588                         goto cleanup;
 589                 }
 590                 while (l--) {
 591                         offd = le32_to_cpu(buf[offb++]);
 592                         if (offd >= size) {
 593                                 dbg("wrong index %#x in response", offd);
 594                                 ret = -EIO;
 595                                 goto cleanup;
 596                         }
 597                         data[offd] = le32_to_cpu(buf[offb++]);
 598                 }
 599         }
 600
 601         ret = 0;
 602
 603 cleanup:
 604         kfree(buf);
 605         return ret;
 606 }
 607
 608 static int cxacru_card_status(struct cxacru_data *instance)
 609 {
 610         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 611         if (ret < 0) {          /* firmware not loaded */
 612                 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
 613                 return ret;
 614         }
 615         return 0;
 616 }
 617
 618 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 619                 struct atm_dev *atm_dev)
 620 {
 621         struct usb_interface *intf = usbatm_instance->usb_intf;
 622
 623         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 624                 device_remove_file(&intf->dev, &dev_attr_##_name);
 625         CXACRU_ALL_FILES(REMOVE);
 626         #undef CXACRU_DEVICE_REMOVE_FILE
 627 }
 628
 629 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 630                 struct atm_dev *atm_dev)
 631 {
 632         struct cxacru_data *instance = usbatm_instance->driver_data;
 633         struct usb_interface *intf = usbatm_instance->usb_intf;
 634         /*
 635         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 636         */
 637         int ret;
 638         int start_polling = 1;
 639
 640         dbg("cxacru_atm_start");
 641
 642         /* Read MAC address */
 643         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 644                         atm_dev->esi, sizeof(atm_dev->esi));
 645         if (ret < 0) {
 646                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 647                 return ret;
 648         }
 649
 650         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 651                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 652                 if (unlikely(ret)) \
 653                         goto fail_sysfs;
 654         CXACRU_ALL_FILES(CREATE);
 655         #undef CXACRU_DEVICE_CREATE_FILE
 656
 657         /* start ADSL */
 658         mutex_lock(&instance->adsl_state_serialize);
 659         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 660         if (ret < 0)
 661                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 662
 663         /* Start status polling */
 664         mutex_lock(&instance->poll_state_serialize);
 665         switch (instance->poll_state) {
 666         case CXPOLL_STOPPED:
 667                 /* start polling */
 668                 instance->poll_state = CXPOLL_POLLING;
 669                 break;
 670
 671         case CXPOLL_STOPPING:
 672                 /* abort stop request */
 673                 instance->poll_state = CXPOLL_POLLING;
 674         case CXPOLL_POLLING:
 675         case CXPOLL_SHUTDOWN:
 676                 /* don't start polling */
 677                 start_polling = 0;
 678         }
 679         mutex_unlock(&instance->poll_state_serialize);
 680         mutex_unlock(&instance->adsl_state_serialize);
 681
 682         if (start_polling)
 683                 cxacru_poll_status(&instance->poll_work.work);
 684         return 0;
 685
 686 fail_sysfs:
 687         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 688         cxacru_remove_device_files(usbatm_instance, atm_dev);
 689         return ret;
 690 }
 691
 692 static void cxacru_poll_status(struct work_struct *work)
 693 {
 694         struct cxacru_data *instance =
 695                 container_of(work, struct cxacru_data, poll_work.work);
 696         u32 buf[CXINF_MAX] = {};
 697         struct usbatm_data *usbatm = instance->usbatm;
 698         struct atm_dev *atm_dev = usbatm->atm_dev;
 699         int keep_polling = 1;
 700         int ret;
 701
 702         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 703         if (ret < 0) {
 704                 if (ret != -ESHUTDOWN)
 705                         atm_warn(usbatm, "poll status: error %d\n", ret);
 706
 707                 mutex_lock(&instance->poll_state_serialize);
 708                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 709                         instance->poll_state = CXPOLL_STOPPED;
 710
 711                         if (ret != -ESHUTDOWN)
 712                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 713                                                 " to 'start' or 'poll' to resume\n");
 714                 }
 715                 mutex_unlock(&instance->poll_state_serialize);
 716                 goto reschedule;
 717         }
 718
 719         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 720
 721         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 722                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 723
 724                 switch (instance->adsl_status) {
 725                 case 0:
 726                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 727                         break;
 728
 729                 case 1:
 730                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 731                         break;
 732
 733                 default:
 734                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 735                         break;
 736                 }
 737         }
 738
 739         if (instance->line_status == buf[CXINF_LINE_STATUS])
 740                 goto reschedule;
 741
 742         instance->line_status = buf[CXINF_LINE_STATUS];
 743         switch (instance->line_status) {
 744         case 0:
 745                 atm_dev->signal = ATM_PHY_SIG_LOST;
 746                 atm_info(usbatm, "ADSL line: down\n");
 747                 break;
 748
 749         case 1:
 750                 atm_dev->signal = ATM_PHY_SIG_LOST;
 751                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 752                 break;
 753
 754         case 2:
 755                 atm_dev->signal = ATM_PHY_SIG_LOST;
 756                 atm_info(usbatm, "ADSL line: training\n");
 757                 break;
 758
 759         case 3:
 760                 atm_dev->signal = ATM_PHY_SIG_LOST;
 761                 atm_info(usbatm, "ADSL line: channel analysis\n");
 762                 break;
 763
 764         case 4:
 765                 atm_dev->signal = ATM_PHY_SIG_LOST;
 766                 atm_info(usbatm, "ADSL line: exchange\n");
 767                 break;
 768
 769         case 5:
 770                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 771                 atm_dev->signal = ATM_PHY_SIG_FOUND;
 772
 773                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 774                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 775                 break;
 776
 777         case 6:
 778                 atm_dev->signal = ATM_PHY_SIG_LOST;
 779                 atm_info(usbatm, "ADSL line: waiting\n");
 780                 break;
 781
 782         case 7:
 783                 atm_dev->signal = ATM_PHY_SIG_LOST;
 784                 atm_info(usbatm, "ADSL line: initializing\n");
 785                 break;
 786
 787         default:
 788                 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 789                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 790                 break;
 791         }
 792 reschedule:
 793
 794         mutex_lock(&instance->poll_state_serialize);
 795         if (instance->poll_state == CXPOLL_STOPPING &&
 796                                 instance->adsl_status == 1 && /* stopped */
 797                                 instance->line_status == 0) /* down */
 798                 instance->poll_state = CXPOLL_STOPPED;
 799
 800         if (instance->poll_state == CXPOLL_STOPPED)
 801                 keep_polling = 0;
 802         mutex_unlock(&instance->poll_state_serialize);
 803
 804         if (keep_polling)
 805                 schedule_delayed_work(&instance->poll_work,
 806                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 807 }
 808
 809 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 810                      u8 code1, u8 code2, u32 addr, u8 *data, int size)
 811 {
 812         int ret;
 813         u8 *buf;
 814         int offd, offb;
 815         const int stride = CMD_PACKET_SIZE - 8;
 816
 817         buf = (u8 *) __get_free_page(GFP_KERNEL);
 818         if (!buf)
 819                 return -ENOMEM;
 820
 821         offb = offd = 0;
 822         do {
 823                 int l = min_t(int, stride, size - offd);
 824                 buf[offb++] = fw;
 825                 buf[offb++] = l;
 826                 buf[offb++] = code1;
 827                 buf[offb++] = code2;
 828                 *((u32 *) (buf + offb)) = cpu_to_le32(addr);
 829                 offb += 4;
 830                 addr += l;
 831                 if(l)
 832                         memcpy(buf + offb, data + offd, l);
 833                 if (l < stride)
 834                         memset(buf + offb + l, 0, stride - l);
 835                 offb += stride;
 836                 offd += stride;
 837                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 838                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 839                                            buf, offb, NULL, CMD_TIMEOUT);
 840                         if (ret < 0) {
 841                                 dbg("sending fw %#x failed", fw);
 842                                 goto cleanup;
 843                         }
 844                         offb = 0;
 845                 }
 846         } while(offd < size);
 847         dbg("sent fw %#x", fw);
 848
 849         ret = 0;
 850
 851 cleanup:
 852         free_page((unsigned long) buf);
 853         return ret;
 854 }
 855
 856 static void cxacru_upload_firmware(struct cxacru_data *instance,
 857                                    const struct firmware *fw,
 858                                    const struct firmware *bp,
 859                                    const struct firmware *cf)
 860 {
 861         int ret;
 862         int off;
 863         struct usbatm_data *usbatm = instance->usbatm;
 864         struct usb_device *usb_dev = usbatm->usb_dev;
 865         u16 signature[] = { usb_dev->descriptor.idVendor, usb_dev->descriptor.idProduct };
 866         u32 val;
 867
 868         dbg("cxacru_upload_firmware");
 869
 870         /* FirmwarePllFClkValue */
 871         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 872         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 873         if (ret) {
 874                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
 875                 return;
 876         }
 877
 878         /* FirmwarePllBClkValue */
 879         val = cpu_to_le32(instance->modem_type->pll_b_clk);
 880         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
 881         if (ret) {
 882                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
 883                 return;
 884         }
 885
 886         /* Enable SDRAM */
 887         val = cpu_to_le32(SDRAM_ENA);
 888         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
 889         if (ret) {
 890                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
 891                 return;
 892         }
 893
 894         /* Firmware */
 895         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
 896         if (ret) {
 897                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
 898                 return;
 899         }
 900
 901         /* Boot ROM patch */
 902         if (instance->modem_type->boot_rom_patch) {
 903                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
 904                 if (ret) {
 905                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
 906                         return;
 907                 }
 908         }
 909
 910         /* Signature */
 911         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
 912         if (ret) {
 913                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
 914                 return;
 915         }
 916
 917         if (instance->modem_type->boot_rom_patch) {
 918                 val = cpu_to_le32(BR_ADDR);
 919                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
 920         }
 921         else {
 922                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
 923         }
 924         if (ret) {
 925                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
 926                 return;
 927         }
 928
 929         /* Delay to allow firmware to start up. */
 930         msleep_interruptible(1000);
 931
 932         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
 933         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
 934         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
 935         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
 936
 937         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 938         if (ret < 0) {
 939                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
 940                 return;
 941         }
 942
 943         /* Load config data (le32), doing one packet at a time */
 944         if (cf)
 945                 for (off = 0; off < cf->size / 4; ) {
 946                         u32 buf[CMD_PACKET_SIZE / 4 - 1];
 947                         int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
 948                         buf[0] = cpu_to_le32(len);
 949                         for (i = 0; i < len; i++, off++) {
 950                                 buf[i * 2 + 1] = cpu_to_le32(off);
 951                                 memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
 952                         }
 953                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 954                                         (u8 *) buf, len, NULL, 0);
 955                         if (ret < 0) {
 956                                 usb_err(usbatm, "load config data failed: %d\n", ret);
 957                                 return;
 958                         }
 959                 }
 960
 961         msleep_interruptible(4000);
 962 }
 963
 964 static int cxacru_find_firmware(struct cxacru_data *instance,
 965                                 char* phase, const struct firmware **fw_p)
 966 {
 967         struct usbatm_data *usbatm = instance->usbatm;
 968         struct device *dev = &usbatm->usb_intf->dev;
 969         char buf[16];
 970
 971         sprintf(buf, "cxacru-%s.bin", phase);
 972         dbg("cxacru_find_firmware: looking for %s", buf);
 973
 974         if (request_firmware(fw_p, buf, dev)) {
 975                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
 976                 return -ENOENT;
 977         }
 978
 979         usb_info(usbatm, "found firmware %s\n", buf);
 980
 981         return 0;
 982 }
 983
 984 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
 985                              struct usb_interface *usb_intf)
 986 {
 987         const struct firmware *fw, *bp, *cf;
 988         struct cxacru_data *instance = usbatm_instance->driver_data;
 989
 990         int ret = cxacru_find_firmware(instance, "fw", &fw);
 991         if (ret) {
 992                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
 993                 return ret;
 994         }
 995
 996         if (instance->modem_type->boot_rom_patch) {
 997                 ret = cxacru_find_firmware(instance, "bp", &bp);
 998                 if (ret) {
 999                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1000                         release_firmware(fw);
1001                         return ret;
1002                 }
1003         }
1004
1005         if (cxacru_find_firmware(instance, "cf", &cf))          /* optional */
1006                 cf = NULL;
1007
1008         cxacru_upload_firmware(instance, fw, bp, cf);
1009
1010         if (cf)
1011                 release_firmware(cf);
1012         if (instance->modem_type->boot_rom_patch)
1013                 release_firmware(bp);
1014         release_firmware(fw);
1015
1016         ret = cxacru_card_status(instance);
1017         if (ret)
1018                 dbg("modem initialisation failed");
1019         else
1020                 dbg("done setting up the modem");
1021
1022         return ret;
1023 }
1024
1025 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1026                        struct usb_interface *intf, const struct usb_device_id *id)
1027 {
1028         struct cxacru_data *instance;
1029         struct usb_device *usb_dev = interface_to_usbdev(intf);
1030         int ret;
1031
1032         /* instance init */
1033         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1034         if (!instance) {
1035                 dbg("cxacru_bind: no memory for instance data");
1036                 return -ENOMEM;
1037         }
1038
1039         instance->usbatm = usbatm_instance;
1040         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1041         memset(instance->card_info, 0, sizeof(instance->card_info));
1042
1043         mutex_init(&instance->poll_state_serialize);
1044         instance->poll_state = CXPOLL_STOPPED;
1045         instance->line_status = -1;
1046         instance->adsl_status = -1;
1047
1048         mutex_init(&instance->adsl_state_serialize);
1049
1050         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1051         if (!instance->rcv_buf) {
1052                 dbg("cxacru_bind: no memory for rcv_buf");
1053                 ret = -ENOMEM;
1054                 goto fail;
1055         }
1056         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1057         if (!instance->snd_buf) {
1058                 dbg("cxacru_bind: no memory for snd_buf");
1059                 ret = -ENOMEM;
1060                 goto fail;
1061         }
1062         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1063         if (!instance->rcv_urb) {
1064                 dbg("cxacru_bind: no memory for rcv_urb");
1065                 ret = -ENOMEM;
1066                 goto fail;
1067         }
1068         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1069         if (!instance->snd_urb) {
1070                 dbg("cxacru_bind: no memory for snd_urb");
1071                 ret = -ENOMEM;
1072                 goto fail;
1073         }
1074
1075         usb_fill_int_urb(instance->rcv_urb,
1076                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1077                         instance->rcv_buf, PAGE_SIZE,
1078                         cxacru_blocking_completion, &instance->rcv_done, 1);
1079
1080         usb_fill_int_urb(instance->snd_urb,
1081                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1082                         instance->snd_buf, PAGE_SIZE,
1083                         cxacru_blocking_completion, &instance->snd_done, 4);
1084
1085         mutex_init(&instance->cm_serialize);
1086
1087         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1088
1089         usbatm_instance->driver_data = instance;
1090
1091         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1092
1093         return 0;
1094
1095  fail:
1096         free_page((unsigned long) instance->snd_buf);
1097         free_page((unsigned long) instance->rcv_buf);
1098         usb_free_urb(instance->snd_urb);
1099         usb_free_urb(instance->rcv_urb);
1100         kfree(instance);
1101
1102         return ret;
1103 }
1104
1105 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1106                 struct usb_interface *intf)
1107 {
1108         struct cxacru_data *instance = usbatm_instance->driver_data;
1109         int is_polling = 1;
1110
1111         dbg("cxacru_unbind entered");
1112
1113         if (!instance) {
1114                 dbg("cxacru_unbind: NULL instance!");
1115                 return;
1116         }
1117
1118         mutex_lock(&instance->poll_state_serialize);
1119         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1120
1121         /* ensure that status polling continues unless
1122          * it has already stopped */
1123         if (instance->poll_state == CXPOLL_STOPPED)
1124                 is_polling = 0;
1125
1126         /* stop polling from being stopped or started */
1127         instance->poll_state = CXPOLL_SHUTDOWN;
1128         mutex_unlock(&instance->poll_state_serialize);
1129
1130         if (is_polling)
1131                 cancel_rearming_delayed_work(&instance->poll_work);
1132
1133         usb_kill_urb(instance->snd_urb);
1134         usb_kill_urb(instance->rcv_urb);
1135         usb_free_urb(instance->snd_urb);
1136         usb_free_urb(instance->rcv_urb);
1137
1138         free_page((unsigned long) instance->snd_buf);
1139         free_page((unsigned long) instance->rcv_buf);
1140
1141         kfree(instance);
1142
1143         usbatm_instance->driver_data = NULL;
1144 }
1145
1146 static const struct cxacru_modem_type cxacru_cafe = {
1147         .pll_f_clk = 0x02d874df,
1148         .pll_b_clk = 0x0196a51a,
1149         .boot_rom_patch = 1,
1150 };
1151
1152 static const struct cxacru_modem_type cxacru_cb00 = {
1153         .pll_f_clk = 0x5,
1154         .pll_b_clk = 0x3,
1155         .boot_rom_patch = 0,
1156 };
1157
1158 static const struct usb_device_id cxacru_usb_ids[] = {
1159         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1160                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1161         },
1162         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1163                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1164         },
1165         { /* V = Conexant                       P = ADSL modem                          */
1166                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1167         },
1168         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1169                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1170         },
1171         { /* V = Conexant                       P = ADSL modem                          */
1172                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1173         },
1174         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1175                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1176         },
1177         { /* V = Olitec                         P = ADSL modem version 2                */
1178                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1179         },
1180         { /* V = Olitec                         P = ADSL modem version 3                */
1181                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1182         },
1183         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1184                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1185         },
1186         { /* V = Zoom                           P = 5510                                */
1187                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1188         },
1189         { /* V = Draytek                        P = Vigor 318                           */
1190                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1191         },
1192         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1193                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1194         },
1195         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1196                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1197         },
1198         { /* V = Aethra                         P = Starmodem UM1020                    */
1199                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1200         },
1201         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1202                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1203         },
1204         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1205                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1206         },
1207         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1208                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1209         },
1210         {}
1211 };
1212
1213 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1214
1215 static struct usbatm_driver cxacru_driver = {
1216         .driver_name    = cxacru_driver_name,
1217         .bind           = cxacru_bind,
1218         .heavy_init     = cxacru_heavy_init,
1219         .unbind         = cxacru_unbind,
1220         .atm_start      = cxacru_atm_start,
1221         .atm_stop       = cxacru_remove_device_files,
1222         .bulk_in        = CXACRU_EP_DATA,
1223         .bulk_out       = CXACRU_EP_DATA,
1224         .rx_padding     = 3,
1225         .tx_padding     = 11,
1226 };
1227
1228 static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1229 {
1230         return usbatm_usb_probe(intf, id, &cxacru_driver);
1231 }
1232
1233 static struct usb_driver cxacru_usb_driver = {
1234         .name           = cxacru_driver_name,
1235         .probe          = cxacru_usb_probe,
1236         .disconnect     = usbatm_usb_disconnect,
1237         .id_table       = cxacru_usb_ids
1238 };
1239
1240 static int __init cxacru_init(void)
1241 {
1242         return usb_register(&cxacru_usb_driver);
1243 }
1244
1245 static void __exit cxacru_cleanup(void)
1246 {
1247         usb_deregister(&cxacru_usb_driver);
1248 }
1249
1250 module_init(cxacru_init);
1251 module_exit(cxacru_cleanup);
1252
1253 MODULE_AUTHOR(DRIVER_AUTHOR);
1254 MODULE_DESCRIPTION(DRIVER_DESC);
1255 MODULE_LICENSE("GPL");
1256 MODULE_VERSION(DRIVER_VERSION);