drivers/usb/atm/cxacru.c

   1 /******************************************************************************
   2  *  cxacru.c  -  driver for USB ADSL modems based on
   3  *               Conexant AccessRunner chipset
   4  *
   5  *  Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
   6  *  Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
   7  *  Copyright (C) 2007 Simon Arlott
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License as published by the Free
  11  *  Software Foundation; either version 2 of the License, or (at your option)
  12  *  any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful, but WITHOUT
  15  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  *  more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along with
  20  *  this program; if not, write to the Free Software Foundation, Inc., 59
  21  *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  ******************************************************************************/
  24
  25 /*
  26  *  Credit is due for Josep Comas, who created the original patch to speedtch.c
  27  *  to support the different padding used by the AccessRunner (now generalized
  28  *  into usbatm), and the userspace firmware loading utility.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/kernel.h>
  34 #include <linux/timer.h>
  35 #include <linux/errno.h>
  36 #include <linux/slab.h>
  37 #include <linux/init.h>
  38 #include <linux/device.h>
  39 #include <linux/firmware.h>
  40 #include <linux/mutex.h>
  41 #include <asm/unaligned.h>
  42
  43 #include "usbatm.h"
  44
  45 #define DRIVER_AUTHOR   "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
  46 #define DRIVER_VERSION  "0.3"
  47 #define DRIVER_DESC     "Conexant AccessRunner ADSL USB modem driver"
  48
  49 static const char cxacru_driver_name[] = "cxacru";
  50
  51 #define CXACRU_EP_CMD           0x01    /* Bulk/interrupt in/out */
  52 #define CXACRU_EP_DATA          0x02    /* Bulk in/out */
  53
  54 #define CMD_PACKET_SIZE         64      /* Should be maxpacket(ep)? */
  55
  56 /* Addresses */
  57 #define PLLFCLK_ADDR    0x00350068
  58 #define PLLBCLK_ADDR    0x0035006c
  59 #define SDRAMEN_ADDR    0x00350010
  60 #define FW_ADDR         0x00801000
  61 #define BR_ADDR         0x00180600
  62 #define SIG_ADDR        0x00180500
  63 #define BR_STACK_ADDR   0x00187f10
  64
  65 /* Values */
  66 #define SDRAM_ENA       0x1
  67
  68 #define CMD_TIMEOUT     2000    /* msecs */
  69 #define POLL_INTERVAL   1       /* secs */
  70
  71 /* commands for interaction with the modem through the control channel before
  72  * firmware is loaded  */
  73 enum cxacru_fw_request {
  74         FW_CMD_ERR,
  75         FW_GET_VER,
  76         FW_READ_MEM,
  77         FW_WRITE_MEM,
  78         FW_RMW_MEM,
  79         FW_CHECKSUM_MEM,
  80         FW_GOTO_MEM,
  81 };
  82
  83 /* commands for interaction with the modem through the control channel once
  84  * firmware is loaded  */
  85 enum cxacru_cm_request {
  86         CM_REQUEST_UNDEFINED = 0x80,
  87         CM_REQUEST_TEST,
  88         CM_REQUEST_CHIP_GET_MAC_ADDRESS,
  89         CM_REQUEST_CHIP_GET_DP_VERSIONS,
  90         CM_REQUEST_CHIP_ADSL_LINE_START,
  91         CM_REQUEST_CHIP_ADSL_LINE_STOP,
  92         CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
  93         CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
  94         CM_REQUEST_CARD_INFO_GET,
  95         CM_REQUEST_CARD_DATA_GET,
  96         CM_REQUEST_CARD_DATA_SET,
  97         CM_REQUEST_COMMAND_HW_IO,
  98         CM_REQUEST_INTERFACE_HW_IO,
  99         CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
 100         CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
 101         CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
 102         CM_REQUEST_CARD_GET_STATUS,
 103         CM_REQUEST_CARD_GET_MAC_ADDRESS,
 104         CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
 105         CM_REQUEST_MAX,
 106 };
 107
 108 /* reply codes to the commands above */
 109 enum cxacru_cm_status {
 110         CM_STATUS_UNDEFINED,
 111         CM_STATUS_SUCCESS,
 112         CM_STATUS_ERROR,
 113         CM_STATUS_UNSUPPORTED,
 114         CM_STATUS_UNIMPLEMENTED,
 115         CM_STATUS_PARAMETER_ERROR,
 116         CM_STATUS_DBG_LOOPBACK,
 117         CM_STATUS_MAX,
 118 };
 119
 120 /* indices into CARD_INFO_GET return array */
 121 enum cxacru_info_idx {
 122         CXINF_DOWNSTREAM_RATE,
 123         CXINF_UPSTREAM_RATE,
 124         CXINF_LINK_STATUS,
 125         CXINF_LINE_STATUS,
 126         CXINF_MAC_ADDRESS_HIGH,
 127         CXINF_MAC_ADDRESS_LOW,
 128         CXINF_UPSTREAM_SNR_MARGIN,
 129         CXINF_DOWNSTREAM_SNR_MARGIN,
 130         CXINF_UPSTREAM_ATTENUATION,
 131         CXINF_DOWNSTREAM_ATTENUATION,
 132         CXINF_TRANSMITTER_POWER,
 133         CXINF_UPSTREAM_BITS_PER_FRAME,
 134         CXINF_DOWNSTREAM_BITS_PER_FRAME,
 135         CXINF_STARTUP_ATTEMPTS,
 136         CXINF_UPSTREAM_CRC_ERRORS,
 137         CXINF_DOWNSTREAM_CRC_ERRORS,
 138         CXINF_UPSTREAM_FEC_ERRORS,
 139         CXINF_DOWNSTREAM_FEC_ERRORS,
 140         CXINF_UPSTREAM_HEC_ERRORS,
 141         CXINF_DOWNSTREAM_HEC_ERRORS,
 142         CXINF_LINE_STARTABLE,
 143         CXINF_MODULATION,
 144         CXINF_ADSL_HEADEND,
 145         CXINF_ADSL_HEADEND_ENVIRONMENT,
 146         CXINF_CONTROLLER_VERSION,
 147         /* dunno what the missing two mean */
 148         CXINF_MAX = 0x1c,
 149 };
 150
 151 enum cxacru_poll_state {
 152         CXPOLL_STOPPING,
 153         CXPOLL_STOPPED,
 154         CXPOLL_POLLING,
 155         CXPOLL_SHUTDOWN
 156 };
 157
 158 struct cxacru_modem_type {
 159         u32 pll_f_clk;
 160         u32 pll_b_clk;
 161         int boot_rom_patch;
 162 };
 163
 164 struct cxacru_data {
 165         struct usbatm_data *usbatm;
 166
 167         const struct cxacru_modem_type *modem_type;
 168
 169         int line_status;
 170         struct mutex adsl_state_serialize;
 171         int adsl_status;
 172         struct delayed_work poll_work;
 173         u32 card_info[CXINF_MAX];
 174         struct mutex poll_state_serialize;
 175         enum cxacru_poll_state poll_state;
 176
 177         /* contol handles */
 178         struct mutex cm_serialize;
 179         u8 *rcv_buf;
 180         u8 *snd_buf;
 181         struct urb *rcv_urb;
 182         struct urb *snd_urb;
 183         struct completion rcv_done;
 184         struct completion snd_done;
 185 };
 186
 187 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 188         u8 *wdata, int wsize, u8 *rdata, int rsize);
 189 static void cxacru_poll_status(struct work_struct *work);
 190
 191 /* Card info exported through sysfs */
 192 #define CXACRU__ATTR_INIT(_name) \
 193 static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
 194
 195 #define CXACRU_CMD_INIT(_name) \
 196 static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
 197         cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
 198
 199 #define CXACRU_ATTR_INIT(_value, _type, _name) \
 200 static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
 201         struct device_attribute *attr, char *buf) \
 202 { \
 203         struct usb_interface *intf = to_usb_interface(dev); \
 204         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); \
 205         struct cxacru_data *instance = usbatm_instance->driver_data; \
 206         return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
 207 } \
 208 CXACRU__ATTR_INIT(_name)
 209
 210 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
 211 #define CXACRU_CMD_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 212 #define CXACRU__ATTR_CREATE(_name)        CXACRU_DEVICE_CREATE_FILE(_name)
 213
 214 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
 215 #define CXACRU_CMD_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 216 #define CXACRU__ATTR_REMOVE(_name)        CXACRU_DEVICE_REMOVE_FILE(_name)
 217
 218 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
 219 {
 220         return snprintf(buf, PAGE_SIZE, "%u\n", value);
 221 }
 222
 223 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
 224 {
 225         return snprintf(buf, PAGE_SIZE, "%d\n", value);
 226 }
 227
 228 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
 229 {
 230         return snprintf(buf, PAGE_SIZE, "%d.%02u\n",
 231                                         value / 100, abs(value) % 100);
 232 }
 233
 234 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 235 {
 236         static char *str[] = { "no", "yes" };
 237         if (unlikely(value >= ARRAY_SIZE(str)))
 238                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 239         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 240 }
 241
 242 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 243 {
 244         static char *str[] = { NULL, "not connected", "connected", "lost" };
 245         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 246                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 247         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 248 }
 249
 250 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 251 {
 252         static char *str[] = { "down", "attempting to activate",
 253                 "training", "channel analysis", "exchange", "up",
 254                 "waiting", "initialising"
 255         };
 256         if (unlikely(value >= ARRAY_SIZE(str)))
 257                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 258         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 259 }
 260
 261 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 262 {
 263         static char *str[] = {
 264                         NULL,
 265                         "ANSI T1.413",
 266                         "ITU-T G.992.1 (G.DMT)",
 267                         "ITU-T G.992.2 (G.LITE)"
 268         };
 269         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 270                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 271         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 272 }
 273
 274 /*
 275  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 276  * this data is already in atm_dev there's no point.
 277  *
 278  * MAC_ADDRESS_HIGH = 0x????5544
 279  * MAC_ADDRESS_LOW  = 0x33221100
 280  * Where 00-55 are bytes 0-5 of the MAC.
 281  */
 282 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
 283         struct device_attribute *attr, char *buf)
 284 {
 285         struct usb_interface *intf = to_usb_interface(dev);
 286         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 287         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 288
 289         return snprintf(buf, PAGE_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x\n",
 290                         atm_dev->esi[0], atm_dev->esi[1], atm_dev->esi[2],
 291                         atm_dev->esi[3], atm_dev->esi[4], atm_dev->esi[5]);
 292 }
 293
 294 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
 295         struct device_attribute *attr, char *buf)
 296 {
 297         struct usb_interface *intf = to_usb_interface(dev);
 298         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 299         struct cxacru_data *instance = usbatm_instance->driver_data;
 300         u32 value = instance->card_info[CXINF_LINE_STARTABLE];
 301
 302         static char *str[] = { "running", "stopped" };
 303         if (unlikely(value >= ARRAY_SIZE(str)))
 304                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 305         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 306 }
 307
 308 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
 309         struct device_attribute *attr, const char *buf, size_t count)
 310 {
 311         struct usb_interface *intf = to_usb_interface(dev);
 312         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 313         struct cxacru_data *instance = usbatm_instance->driver_data;
 314         int ret;
 315         int poll = -1;
 316         char str_cmd[8];
 317         int len = strlen(buf);
 318
 319         if (!capable(CAP_NET_ADMIN))
 320                 return -EACCES;
 321
 322         ret = sscanf(buf, "%7s", str_cmd);
 323         if (ret != 1)
 324                 return -EINVAL;
 325         ret = 0;
 326
 327         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 328                 return -ERESTARTSYS;
 329
 330         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 331                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 332                 if (ret < 0) {
 333                         atm_err(usbatm_instance, "change adsl state:"
 334                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 335
 336                         ret = -EIO;
 337                 } else {
 338                         ret = len;
 339                         poll = CXPOLL_STOPPED;
 340                 }
 341         }
 342
 343         /* Line status is only updated every second
 344          * and the device appears to only react to
 345          * START/STOP every second too. Wait 1.5s to
 346          * be sure that restart will have an effect. */
 347         if (!strcmp(str_cmd, "restart"))
 348                 msleep(1500);
 349
 350         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 351                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 352                 if (ret < 0) {
 353                         atm_err(usbatm_instance, "change adsl state:"
 354                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 355
 356                         ret = -EIO;
 357                 } else {
 358                         ret = len;
 359                         poll = CXPOLL_POLLING;
 360                 }
 361         }
 362
 363         if (!strcmp(str_cmd, "poll")) {
 364                 ret = len;
 365                 poll = CXPOLL_POLLING;
 366         }
 367
 368         if (ret == 0) {
 369                 ret = -EINVAL;
 370                 poll = -1;
 371         }
 372
 373         if (poll == CXPOLL_POLLING) {
 374                 mutex_lock(&instance->poll_state_serialize);
 375                 switch (instance->poll_state) {
 376                 case CXPOLL_STOPPED:
 377                         /* start polling */
 378                         instance->poll_state = CXPOLL_POLLING;
 379                         break;
 380
 381                 case CXPOLL_STOPPING:
 382                         /* abort stop request */
 383                         instance->poll_state = CXPOLL_POLLING;
 384                 case CXPOLL_POLLING:
 385                 case CXPOLL_SHUTDOWN:
 386                         /* don't start polling */
 387                         poll = -1;
 388                 }
 389                 mutex_unlock(&instance->poll_state_serialize);
 390         } else if (poll == CXPOLL_STOPPED) {
 391                 mutex_lock(&instance->poll_state_serialize);
 392                 /* request stop */
 393                 if (instance->poll_state == CXPOLL_POLLING)
 394                         instance->poll_state = CXPOLL_STOPPING;
 395                 mutex_unlock(&instance->poll_state_serialize);
 396         }
 397
 398         mutex_unlock(&instance->adsl_state_serialize);
 399
 400         if (poll == CXPOLL_POLLING)
 401                 cxacru_poll_status(&instance->poll_work.work);
 402
 403         return ret;
 404 }
 405
 406 /*
 407  * All device attributes are included in CXACRU_ALL_FILES
 408  * so that the same list can be used multiple times:
 409  *     INIT   (define the device attributes)
 410  *     CREATE (create all the device files)
 411  *     REMOVE (remove all the device files)
 412  *
 413  * With the last two being defined as needed in the functions
 414  * they are used in before calling CXACRU_ALL_FILES()
 415  */
 416 #define CXACRU_ALL_FILES(_action) \
 417 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 418 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 419 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 420 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 421 CXACRU__ATTR_##_action(                                      mac_address); \
 422 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 423 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 424 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 425 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 426 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 427 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 428 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 429 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 430 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 431 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 432 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 433 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 434 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 435 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 436 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 437 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 438 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 439 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 440 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 441 CXACRU_CMD_##_action(                                        adsl_state);
 442
 443 CXACRU_ALL_FILES(INIT);
 444
 445 /* the following three functions are stolen from drivers/usb/core/message.c */
 446 static void cxacru_blocking_completion(struct urb *urb)
 447 {
 448         complete(urb->context);
 449 }
 450
 451 static void cxacru_timeout_kill(unsigned long data)
 452 {
 453         usb_unlink_urb((struct urb *) data);
 454 }
 455
 456 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 457                                  int* actual_length)
 458 {
 459         struct timer_list timer;
 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 urb->status; /* must read status after completion */
 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                 if (printk_ratelimit())
 487                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
 488                                 wbuflen, rbuflen);
 489                 ret = -ENOMEM;
 490                 goto fail;
 491         }
 492
 493         mutex_lock(&instance->cm_serialize);
 494
 495         /* submit reading urb before the writing one */
 496         init_completion(&instance->rcv_done);
 497         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 498         if (ret < 0) {
 499                 if (printk_ratelimit())
 500                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
 501                                 cm, ret);
 502                 goto fail;
 503         }
 504
 505         memset(wbuf, 0, wbuflen);
 506         /* handle wsize == 0 */
 507         wbuf[0] = cm;
 508         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 509                 wbuf[offb] = cm;
 510                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 511         }
 512
 513         instance->snd_urb->transfer_buffer_length = wbuflen;
 514         init_completion(&instance->snd_done);
 515         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 516         if (ret < 0) {
 517                 if (printk_ratelimit())
 518                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
 519                                 cm, ret);
 520                 goto fail;
 521         }
 522
 523         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 524         if (ret < 0) {
 525                 if (printk_ratelimit())
 526                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
 527                 goto fail;
 528         }
 529
 530         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 531         if (ret < 0) {
 532                 if (printk_ratelimit())
 533                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
 534                 goto fail;
 535         }
 536         if (actlen % CMD_PACKET_SIZE || !actlen) {
 537                 if (printk_ratelimit())
 538                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
 539                                 cm, actlen);
 540                 ret = -EIO;
 541                 goto fail;
 542         }
 543
 544         /* check the return status and copy the data to the output buffer, if needed */
 545         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 546                 if (rbuf[offb] != cm) {
 547                         if (printk_ratelimit())
 548                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
 549                                         rbuf[offb], cm);
 550                         ret = -EIO;
 551                         goto fail;
 552                 }
 553                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 554                         if (printk_ratelimit())
 555                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
 556                                         cm, rbuf[offb + 1]);
 557                         ret = -EIO;
 558                         goto fail;
 559                 }
 560                 if (offd >= rsize)
 561                         break;
 562                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 563                 offd += stride;
 564         }
 565
 566         ret = offd;
 567         dbg("cm %#x", cm);
 568 fail:
 569         mutex_unlock(&instance->cm_serialize);
 570         return ret;
 571 }
 572
 573 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 574                                u32 *data, int size)
 575 {
 576         int ret, len;
 577         __le32 *buf;
 578         int offb, offd;
 579         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 580         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 581
 582         buf = kmalloc(buflen, GFP_KERNEL);
 583         if (!buf)
 584                 return -ENOMEM;
 585
 586         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 587         if (ret < 0)
 588                 goto cleanup;
 589
 590         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 591         len = ret / 4;
 592         for (offb = 0; offb < len; ) {
 593                 int l = le32_to_cpu(buf[offb++]);
 594                 if (l > stride || l > (len - offb) / 2) {
 595                         if (printk_ratelimit())
 596                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
 597                                         cm, l);
 598                         ret = -EIO;
 599                         goto cleanup;
 600                 }
 601                 while (l--) {
 602                         offd = le32_to_cpu(buf[offb++]);
 603                         if (offd >= size) {
 604                                 if (printk_ratelimit())
 605                                         usb_err(instance->usbatm, "wrong index #%x in response to cm #%x\n",
 606                                                 offd, cm);
 607                                 ret = -EIO;
 608                                 goto cleanup;
 609                         }
 610                         data[offd] = le32_to_cpu(buf[offb++]);
 611                 }
 612         }
 613
 614         ret = 0;
 615
 616 cleanup:
 617         kfree(buf);
 618         return ret;
 619 }
 620
 621 static int cxacru_card_status(struct cxacru_data *instance)
 622 {
 623         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 624         if (ret < 0) {          /* firmware not loaded */
 625                 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
 626                 return ret;
 627         }
 628         return 0;
 629 }
 630
 631 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 632                 struct atm_dev *atm_dev)
 633 {
 634         struct usb_interface *intf = usbatm_instance->usb_intf;
 635
 636         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 637                 device_remove_file(&intf->dev, &dev_attr_##_name);
 638         CXACRU_ALL_FILES(REMOVE);
 639         #undef CXACRU_DEVICE_REMOVE_FILE
 640 }
 641
 642 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 643                 struct atm_dev *atm_dev)
 644 {
 645         struct cxacru_data *instance = usbatm_instance->driver_data;
 646         struct usb_interface *intf = usbatm_instance->usb_intf;
 647         /*
 648         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 649         */
 650         int ret;
 651         int start_polling = 1;
 652
 653         dbg("cxacru_atm_start");
 654
 655         /* Read MAC address */
 656         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 657                         atm_dev->esi, sizeof(atm_dev->esi));
 658         if (ret < 0) {
 659                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 660                 return ret;
 661         }
 662
 663         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 664                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 665                 if (unlikely(ret)) \
 666                         goto fail_sysfs;
 667         CXACRU_ALL_FILES(CREATE);
 668         #undef CXACRU_DEVICE_CREATE_FILE
 669
 670         /* start ADSL */
 671         mutex_lock(&instance->adsl_state_serialize);
 672         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 673         if (ret < 0)
 674                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 675
 676         /* Start status polling */
 677         mutex_lock(&instance->poll_state_serialize);
 678         switch (instance->poll_state) {
 679         case CXPOLL_STOPPED:
 680                 /* start polling */
 681                 instance->poll_state = CXPOLL_POLLING;
 682                 break;
 683
 684         case CXPOLL_STOPPING:
 685                 /* abort stop request */
 686                 instance->poll_state = CXPOLL_POLLING;
 687         case CXPOLL_POLLING:
 688         case CXPOLL_SHUTDOWN:
 689                 /* don't start polling */
 690                 start_polling = 0;
 691         }
 692         mutex_unlock(&instance->poll_state_serialize);
 693         mutex_unlock(&instance->adsl_state_serialize);
 694
 695         if (start_polling)
 696                 cxacru_poll_status(&instance->poll_work.work);
 697         return 0;
 698
 699 fail_sysfs:
 700         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 701         cxacru_remove_device_files(usbatm_instance, atm_dev);
 702         return ret;
 703 }
 704
 705 static void cxacru_poll_status(struct work_struct *work)
 706 {
 707         struct cxacru_data *instance =
 708                 container_of(work, struct cxacru_data, poll_work.work);
 709         u32 buf[CXINF_MAX] = {};
 710         struct usbatm_data *usbatm = instance->usbatm;
 711         struct atm_dev *atm_dev = usbatm->atm_dev;
 712         int keep_polling = 1;
 713         int ret;
 714
 715         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 716         if (ret < 0) {
 717                 if (ret != -ESHUTDOWN)
 718                         atm_warn(usbatm, "poll status: error %d\n", ret);
 719
 720                 mutex_lock(&instance->poll_state_serialize);
 721                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 722                         instance->poll_state = CXPOLL_STOPPED;
 723
 724                         if (ret != -ESHUTDOWN)
 725                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 726                                                 " to 'start' or 'poll' to resume\n");
 727                 }
 728                 mutex_unlock(&instance->poll_state_serialize);
 729                 goto reschedule;
 730         }
 731
 732         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 733
 734         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 735                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 736
 737                 switch (instance->adsl_status) {
 738                 case 0:
 739                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 740                         break;
 741
 742                 case 1:
 743                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 744                         break;
 745
 746                 default:
 747                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 748                         break;
 749                 }
 750         }
 751
 752         if (instance->line_status == buf[CXINF_LINE_STATUS])
 753                 goto reschedule;
 754
 755         instance->line_status = buf[CXINF_LINE_STATUS];
 756         switch (instance->line_status) {
 757         case 0:
 758                 atm_dev->signal = ATM_PHY_SIG_LOST;
 759                 atm_info(usbatm, "ADSL line: down\n");
 760                 break;
 761
 762         case 1:
 763                 atm_dev->signal = ATM_PHY_SIG_LOST;
 764                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 765                 break;
 766
 767         case 2:
 768                 atm_dev->signal = ATM_PHY_SIG_LOST;
 769                 atm_info(usbatm, "ADSL line: training\n");
 770                 break;
 771
 772         case 3:
 773                 atm_dev->signal = ATM_PHY_SIG_LOST;
 774                 atm_info(usbatm, "ADSL line: channel analysis\n");
 775                 break;
 776
 777         case 4:
 778                 atm_dev->signal = ATM_PHY_SIG_LOST;
 779                 atm_info(usbatm, "ADSL line: exchange\n");
 780                 break;
 781
 782         case 5:
 783                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 784                 atm_dev->signal = ATM_PHY_SIG_FOUND;
 785
 786                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 787                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 788                 break;
 789
 790         case 6:
 791                 atm_dev->signal = ATM_PHY_SIG_LOST;
 792                 atm_info(usbatm, "ADSL line: waiting\n");
 793                 break;
 794
 795         case 7:
 796                 atm_dev->signal = ATM_PHY_SIG_LOST;
 797                 atm_info(usbatm, "ADSL line: initializing\n");
 798                 break;
 799
 800         default:
 801                 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 802                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 803                 break;
 804         }
 805 reschedule:
 806
 807         mutex_lock(&instance->poll_state_serialize);
 808         if (instance->poll_state == CXPOLL_STOPPING &&
 809                                 instance->adsl_status == 1 && /* stopped */
 810                                 instance->line_status == 0) /* down */
 811                 instance->poll_state = CXPOLL_STOPPED;
 812
 813         if (instance->poll_state == CXPOLL_STOPPED)
 814                 keep_polling = 0;
 815         mutex_unlock(&instance->poll_state_serialize);
 816
 817         if (keep_polling)
 818                 schedule_delayed_work(&instance->poll_work,
 819                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 820 }
 821
 822 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 823                      u8 code1, u8 code2, u32 addr, const u8 *data, int size)
 824 {
 825         int ret;
 826         u8 *buf;
 827         int offd, offb;
 828         const int stride = CMD_PACKET_SIZE - 8;
 829
 830         buf = (u8 *) __get_free_page(GFP_KERNEL);
 831         if (!buf)
 832                 return -ENOMEM;
 833
 834         offb = offd = 0;
 835         do {
 836                 int l = min_t(int, stride, size - offd);
 837                 buf[offb++] = fw;
 838                 buf[offb++] = l;
 839                 buf[offb++] = code1;
 840                 buf[offb++] = code2;
 841                 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
 842                 offb += 4;
 843                 addr += l;
 844                 if(l)
 845                         memcpy(buf + offb, data + offd, l);
 846                 if (l < stride)
 847                         memset(buf + offb + l, 0, stride - l);
 848                 offb += stride;
 849                 offd += stride;
 850                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 851                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 852                                            buf, offb, NULL, CMD_TIMEOUT);
 853                         if (ret < 0) {
 854                                 dbg("sending fw %#x failed", fw);
 855                                 goto cleanup;
 856                         }
 857                         offb = 0;
 858                 }
 859         } while(offd < size);
 860         dbg("sent fw %#x", fw);
 861
 862         ret = 0;
 863
 864 cleanup:
 865         free_page((unsigned long) buf);
 866         return ret;
 867 }
 868
 869 static void cxacru_upload_firmware(struct cxacru_data *instance,
 870                                    const struct firmware *fw,
 871                                    const struct firmware *bp,
 872                                    const struct firmware *cf)
 873 {
 874         int ret;
 875         int off;
 876         struct usbatm_data *usbatm = instance->usbatm;
 877         struct usb_device *usb_dev = usbatm->usb_dev;
 878         __le16 signature[] = { usb_dev->descriptor.idVendor,
 879                                usb_dev->descriptor.idProduct };
 880         __le32 val;
 881
 882         dbg("cxacru_upload_firmware");
 883
 884         /* FirmwarePllFClkValue */
 885         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 886         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 887         if (ret) {
 888                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
 889                 return;
 890         }
 891
 892         /* FirmwarePllBClkValue */
 893         val = cpu_to_le32(instance->modem_type->pll_b_clk);
 894         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
 895         if (ret) {
 896                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
 897                 return;
 898         }
 899
 900         /* Enable SDRAM */
 901         val = cpu_to_le32(SDRAM_ENA);
 902         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
 903         if (ret) {
 904                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
 905                 return;
 906         }
 907
 908         /* Firmware */
 909         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
 910         if (ret) {
 911                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
 912                 return;
 913         }
 914
 915         /* Boot ROM patch */
 916         if (instance->modem_type->boot_rom_patch) {
 917                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
 918                 if (ret) {
 919                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
 920                         return;
 921                 }
 922         }
 923
 924         /* Signature */
 925         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
 926         if (ret) {
 927                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
 928                 return;
 929         }
 930
 931         if (instance->modem_type->boot_rom_patch) {
 932                 val = cpu_to_le32(BR_ADDR);
 933                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
 934         }
 935         else {
 936                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
 937         }
 938         if (ret) {
 939                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
 940                 return;
 941         }
 942
 943         /* Delay to allow firmware to start up. */
 944         msleep_interruptible(1000);
 945
 946         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
 947         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
 948         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
 949         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
 950
 951         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 952         if (ret < 0) {
 953                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
 954                 return;
 955         }
 956
 957         /* Load config data (le32), doing one packet at a time */
 958         if (cf)
 959                 for (off = 0; off < cf->size / 4; ) {
 960                         __le32 buf[CMD_PACKET_SIZE / 4 - 1];
 961                         int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
 962                         buf[0] = cpu_to_le32(len);
 963                         for (i = 0; i < len; i++, off++) {
 964                                 buf[i * 2 + 1] = cpu_to_le32(off);
 965                                 memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
 966                         }
 967                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 968                                         (u8 *) buf, len, NULL, 0);
 969                         if (ret < 0) {
 970                                 usb_err(usbatm, "load config data failed: %d\n", ret);
 971                                 return;
 972                         }
 973                 }
 974
 975         msleep_interruptible(4000);
 976 }
 977
 978 static int cxacru_find_firmware(struct cxacru_data *instance,
 979                                 char* phase, const struct firmware **fw_p)
 980 {
 981         struct usbatm_data *usbatm = instance->usbatm;
 982         struct device *dev = &usbatm->usb_intf->dev;
 983         char buf[16];
 984
 985         sprintf(buf, "cxacru-%s.bin", phase);
 986         dbg("cxacru_find_firmware: looking for %s", buf);
 987
 988         if (request_firmware(fw_p, buf, dev)) {
 989                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
 990                 return -ENOENT;
 991         }
 992
 993         usb_info(usbatm, "found firmware %s\n", buf);
 994
 995         return 0;
 996 }
 997
 998 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
 999                              struct usb_interface *usb_intf)
1000 {
1001         const struct firmware *fw, *bp, *cf;
1002         struct cxacru_data *instance = usbatm_instance->driver_data;
1003
1004         int ret = cxacru_find_firmware(instance, "fw", &fw);
1005         if (ret) {
1006                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1007                 return ret;
1008         }
1009
1010         if (instance->modem_type->boot_rom_patch) {
1011                 ret = cxacru_find_firmware(instance, "bp", &bp);
1012                 if (ret) {
1013                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1014                         release_firmware(fw);
1015                         return ret;
1016                 }
1017         }
1018
1019         if (cxacru_find_firmware(instance, "cf", &cf))          /* optional */
1020                 cf = NULL;
1021
1022         cxacru_upload_firmware(instance, fw, bp, cf);
1023
1024         if (cf)
1025                 release_firmware(cf);
1026         if (instance->modem_type->boot_rom_patch)
1027                 release_firmware(bp);
1028         release_firmware(fw);
1029
1030         ret = cxacru_card_status(instance);
1031         if (ret)
1032                 dbg("modem initialisation failed");
1033         else
1034                 dbg("done setting up the modem");
1035
1036         return ret;
1037 }
1038
1039 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1040                        struct usb_interface *intf, const struct usb_device_id *id)
1041 {
1042         struct cxacru_data *instance;
1043         struct usb_device *usb_dev = interface_to_usbdev(intf);
1044         int ret;
1045
1046         /* instance init */
1047         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1048         if (!instance) {
1049                 dbg("cxacru_bind: no memory for instance data");
1050                 return -ENOMEM;
1051         }
1052
1053         instance->usbatm = usbatm_instance;
1054         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1055
1056         mutex_init(&instance->poll_state_serialize);
1057         instance->poll_state = CXPOLL_STOPPED;
1058         instance->line_status = -1;
1059         instance->adsl_status = -1;
1060
1061         mutex_init(&instance->adsl_state_serialize);
1062
1063         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1064         if (!instance->rcv_buf) {
1065                 dbg("cxacru_bind: no memory for rcv_buf");
1066                 ret = -ENOMEM;
1067                 goto fail;
1068         }
1069         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1070         if (!instance->snd_buf) {
1071                 dbg("cxacru_bind: no memory for snd_buf");
1072                 ret = -ENOMEM;
1073                 goto fail;
1074         }
1075         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1076         if (!instance->rcv_urb) {
1077                 dbg("cxacru_bind: no memory for rcv_urb");
1078                 ret = -ENOMEM;
1079                 goto fail;
1080         }
1081         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1082         if (!instance->snd_urb) {
1083                 dbg("cxacru_bind: no memory for snd_urb");
1084                 ret = -ENOMEM;
1085                 goto fail;
1086         }
1087
1088         usb_fill_int_urb(instance->rcv_urb,
1089                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1090                         instance->rcv_buf, PAGE_SIZE,
1091                         cxacru_blocking_completion, &instance->rcv_done, 1);
1092
1093         usb_fill_int_urb(instance->snd_urb,
1094                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1095                         instance->snd_buf, PAGE_SIZE,
1096                         cxacru_blocking_completion, &instance->snd_done, 4);
1097
1098         mutex_init(&instance->cm_serialize);
1099
1100         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1101
1102         usbatm_instance->driver_data = instance;
1103
1104         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1105
1106         return 0;
1107
1108  fail:
1109         free_page((unsigned long) instance->snd_buf);
1110         free_page((unsigned long) instance->rcv_buf);
1111         usb_free_urb(instance->snd_urb);
1112         usb_free_urb(instance->rcv_urb);
1113         kfree(instance);
1114
1115         return ret;
1116 }
1117
1118 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1119                 struct usb_interface *intf)
1120 {
1121         struct cxacru_data *instance = usbatm_instance->driver_data;
1122         int is_polling = 1;
1123
1124         dbg("cxacru_unbind entered");
1125
1126         if (!instance) {
1127                 dbg("cxacru_unbind: NULL instance!");
1128                 return;
1129         }
1130
1131         mutex_lock(&instance->poll_state_serialize);
1132         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1133
1134         /* ensure that status polling continues unless
1135          * it has already stopped */
1136         if (instance->poll_state == CXPOLL_STOPPED)
1137                 is_polling = 0;
1138
1139         /* stop polling from being stopped or started */
1140         instance->poll_state = CXPOLL_SHUTDOWN;
1141         mutex_unlock(&instance->poll_state_serialize);
1142
1143         if (is_polling)
1144                 cancel_rearming_delayed_work(&instance->poll_work);
1145
1146         usb_kill_urb(instance->snd_urb);
1147         usb_kill_urb(instance->rcv_urb);
1148         usb_free_urb(instance->snd_urb);
1149         usb_free_urb(instance->rcv_urb);
1150
1151         free_page((unsigned long) instance->snd_buf);
1152         free_page((unsigned long) instance->rcv_buf);
1153
1154         kfree(instance);
1155
1156         usbatm_instance->driver_data = NULL;
1157 }
1158
1159 static const struct cxacru_modem_type cxacru_cafe = {
1160         .pll_f_clk = 0x02d874df,
1161         .pll_b_clk = 0x0196a51a,
1162         .boot_rom_patch = 1,
1163 };
1164
1165 static const struct cxacru_modem_type cxacru_cb00 = {
1166         .pll_f_clk = 0x5,
1167         .pll_b_clk = 0x3,
1168         .boot_rom_patch = 0,
1169 };
1170
1171 static const struct usb_device_id cxacru_usb_ids[] = {
1172         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1173                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1174         },
1175         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1176                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1177         },
1178         { /* V = Conexant                       P = ADSL modem                          */
1179                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1180         },
1181         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1182                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1183         },
1184         { /* V = Conexant                       P = ADSL modem                          */
1185                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1186         },
1187         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1188                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1189         },
1190         { /* V = Olitec                         P = ADSL modem version 2                */
1191                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1192         },
1193         { /* V = Olitec                         P = ADSL modem version 3                */
1194                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1195         },
1196         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1197                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1198         },
1199         { /* V = Zoom                           P = 5510                                */
1200                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1201         },
1202         { /* V = Draytek                        P = Vigor 318                           */
1203                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1204         },
1205         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1206                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1207         },
1208         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1209                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1210         },
1211         { /* V = Aethra                         P = Starmodem UM1020                    */
1212                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1213         },
1214         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1215                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1216         },
1217         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1218                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1219         },
1220         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1221                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1222         },
1223         {}
1224 };
1225
1226 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1227
1228 static struct usbatm_driver cxacru_driver = {
1229         .driver_name    = cxacru_driver_name,
1230         .bind           = cxacru_bind,
1231         .heavy_init     = cxacru_heavy_init,
1232         .unbind         = cxacru_unbind,
1233         .atm_start      = cxacru_atm_start,
1234         .atm_stop       = cxacru_remove_device_files,
1235         .bulk_in        = CXACRU_EP_DATA,
1236         .bulk_out       = CXACRU_EP_DATA,
1237         .rx_padding     = 3,
1238         .tx_padding     = 11,
1239 };
1240
1241 static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1242 {
1243         return usbatm_usb_probe(intf, id, &cxacru_driver);
1244 }
1245
1246 static struct usb_driver cxacru_usb_driver = {
1247         .name           = cxacru_driver_name,
1248         .probe          = cxacru_usb_probe,
1249         .disconnect     = usbatm_usb_disconnect,
1250         .id_table       = cxacru_usb_ids
1251 };
1252
1253 static int __init cxacru_init(void)
1254 {
1255         return usb_register(&cxacru_usb_driver);
1256 }
1257
1258 static void __exit cxacru_cleanup(void)
1259 {
1260         usb_deregister(&cxacru_usb_driver);
1261 }
1262
1263 module_init(cxacru_init);
1264 module_exit(cxacru_cleanup);
1265
1266 MODULE_AUTHOR(DRIVER_AUTHOR);
1267 MODULE_DESCRIPTION(DRIVER_DESC);
1268 MODULE_LICENSE("GPL");
1269 MODULE_VERSION(DRIVER_VERSION);