drivers/usb/atm/cxacru.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /******************************************************************************
   3  *  cxacru.c  -  driver for USB ADSL modems based on
   4  *               Conexant AccessRunner chipset
   5  *
   6  *  Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
   7  *  Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
   8  *  Copyright (C) 2007 Simon Arlott
   9  *  Copyright (C) 2009 Simon Arlott
  10  ******************************************************************************/
  11
  12 /*
  13  *  Credit is due for Josep Comas, who created the original patch to speedtch.c
  14  *  to support the different padding used by the AccessRunner (now generalized
  15  *  into usbatm), and the userspace firmware loading utility.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/kernel.h>
  21 #include <linux/timer.h>
  22 #include <linux/errno.h>
  23 #include <linux/slab.h>
  24 #include <linux/device.h>
  25 #include <linux/firmware.h>
  26 #include <linux/mutex.h>
  27 #include <asm/unaligned.h>
  28
  29 #include "usbatm.h"
  30
  31 #define DRIVER_AUTHOR   "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
  32 #define DRIVER_DESC     "Conexant AccessRunner ADSL USB modem driver"
  33
  34 static const char cxacru_driver_name[] = "cxacru";
  35
  36 #define CXACRU_EP_CMD           0x01    /* Bulk/interrupt in/out */
  37 #define CXACRU_EP_DATA          0x02    /* Bulk in/out */
  38
  39 #define CMD_PACKET_SIZE         64      /* Should be maxpacket(ep)? */
  40 #define CMD_MAX_CONFIG          ((CMD_PACKET_SIZE / 4 - 1) / 2)
  41
  42 /* Addresses */
  43 #define PLLFCLK_ADDR    0x00350068
  44 #define PLLBCLK_ADDR    0x0035006c
  45 #define SDRAMEN_ADDR    0x00350010
  46 #define FW_ADDR         0x00801000
  47 #define BR_ADDR         0x00180600
  48 #define SIG_ADDR        0x00180500
  49 #define BR_STACK_ADDR   0x00187f10
  50
  51 /* Values */
  52 #define SDRAM_ENA       0x1
  53
  54 #define CMD_TIMEOUT     2000    /* msecs */
  55 #define POLL_INTERVAL   1       /* secs */
  56
  57 /* commands for interaction with the modem through the control channel before
  58  * firmware is loaded  */
  59 enum cxacru_fw_request {
  60         FW_CMD_ERR,
  61         FW_GET_VER,
  62         FW_READ_MEM,
  63         FW_WRITE_MEM,
  64         FW_RMW_MEM,
  65         FW_CHECKSUM_MEM,
  66         FW_GOTO_MEM,
  67 };
  68
  69 /* commands for interaction with the modem through the control channel once
  70  * firmware is loaded  */
  71 enum cxacru_cm_request {
  72         CM_REQUEST_UNDEFINED = 0x80,
  73         CM_REQUEST_TEST,
  74         CM_REQUEST_CHIP_GET_MAC_ADDRESS,
  75         CM_REQUEST_CHIP_GET_DP_VERSIONS,
  76         CM_REQUEST_CHIP_ADSL_LINE_START,
  77         CM_REQUEST_CHIP_ADSL_LINE_STOP,
  78         CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
  79         CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
  80         CM_REQUEST_CARD_INFO_GET,
  81         CM_REQUEST_CARD_DATA_GET,
  82         CM_REQUEST_CARD_DATA_SET,
  83         CM_REQUEST_COMMAND_HW_IO,
  84         CM_REQUEST_INTERFACE_HW_IO,
  85         CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
  86         CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
  87         CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
  88         CM_REQUEST_CARD_GET_STATUS,
  89         CM_REQUEST_CARD_GET_MAC_ADDRESS,
  90         CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
  91         CM_REQUEST_MAX,
  92 };
  93
  94 /* commands for interaction with the flash memory
  95  *
  96  * read:  response is the contents of the first 60 bytes of flash memory
  97  * write: request contains the 60 bytes of data to write to flash memory
  98  *        response is the contents of the first 60 bytes of flash memory
  99  *
 100  * layout: PP PP VV VV  MM MM MM MM  MM MM ?? ??  SS SS SS SS  SS SS SS SS
 101  *         SS SS SS SS  SS SS SS SS  00 00 00 00  00 00 00 00  00 00 00 00
 102  *         00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00
 103  *
 104  *   P: le16  USB Product ID
 105  *   V: le16  USB Vendor ID
 106  *   M: be48  MAC Address
 107  *   S: le16  ASCII Serial Number
 108  */
 109 enum cxacru_cm_flash {
 110         CM_FLASH_READ = 0xa1,
 111         CM_FLASH_WRITE = 0xa2
 112 };
 113
 114 /* reply codes to the commands above */
 115 enum cxacru_cm_status {
 116         CM_STATUS_UNDEFINED,
 117         CM_STATUS_SUCCESS,
 118         CM_STATUS_ERROR,
 119         CM_STATUS_UNSUPPORTED,
 120         CM_STATUS_UNIMPLEMENTED,
 121         CM_STATUS_PARAMETER_ERROR,
 122         CM_STATUS_DBG_LOOPBACK,
 123         CM_STATUS_MAX,
 124 };
 125
 126 /* indices into CARD_INFO_GET return array */
 127 enum cxacru_info_idx {
 128         CXINF_DOWNSTREAM_RATE,
 129         CXINF_UPSTREAM_RATE,
 130         CXINF_LINK_STATUS,
 131         CXINF_LINE_STATUS,
 132         CXINF_MAC_ADDRESS_HIGH,
 133         CXINF_MAC_ADDRESS_LOW,
 134         CXINF_UPSTREAM_SNR_MARGIN,
 135         CXINF_DOWNSTREAM_SNR_MARGIN,
 136         CXINF_UPSTREAM_ATTENUATION,
 137         CXINF_DOWNSTREAM_ATTENUATION,
 138         CXINF_TRANSMITTER_POWER,
 139         CXINF_UPSTREAM_BITS_PER_FRAME,
 140         CXINF_DOWNSTREAM_BITS_PER_FRAME,
 141         CXINF_STARTUP_ATTEMPTS,
 142         CXINF_UPSTREAM_CRC_ERRORS,
 143         CXINF_DOWNSTREAM_CRC_ERRORS,
 144         CXINF_UPSTREAM_FEC_ERRORS,
 145         CXINF_DOWNSTREAM_FEC_ERRORS,
 146         CXINF_UPSTREAM_HEC_ERRORS,
 147         CXINF_DOWNSTREAM_HEC_ERRORS,
 148         CXINF_LINE_STARTABLE,
 149         CXINF_MODULATION,
 150         CXINF_ADSL_HEADEND,
 151         CXINF_ADSL_HEADEND_ENVIRONMENT,
 152         CXINF_CONTROLLER_VERSION,
 153         /* dunno what the missing two mean */
 154         CXINF_MAX = 0x1c,
 155 };
 156
 157 enum cxacru_poll_state {
 158         CXPOLL_STOPPING,
 159         CXPOLL_STOPPED,
 160         CXPOLL_POLLING,
 161         CXPOLL_SHUTDOWN
 162 };
 163
 164 struct cxacru_modem_type {
 165         u32 pll_f_clk;
 166         u32 pll_b_clk;
 167         int boot_rom_patch;
 168 };
 169
 170 struct cxacru_data {
 171         struct usbatm_data *usbatm;
 172
 173         const struct cxacru_modem_type *modem_type;
 174
 175         int line_status;
 176         struct mutex adsl_state_serialize;
 177         int adsl_status;
 178         struct delayed_work poll_work;
 179         u32 card_info[CXINF_MAX];
 180         struct mutex poll_state_serialize;
 181         enum cxacru_poll_state poll_state;
 182
 183         /* control handles */
 184         struct mutex cm_serialize;
 185         u8 *rcv_buf;
 186         u8 *snd_buf;
 187         struct urb *rcv_urb;
 188         struct urb *snd_urb;
 189         struct completion rcv_done;
 190         struct completion snd_done;
 191 };
 192
 193 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 194         u8 *wdata, int wsize, u8 *rdata, int rsize);
 195 static void cxacru_poll_status(struct work_struct *work);
 196
 197 /* Card info exported through sysfs */
 198 #define CXACRU__ATTR_INIT(_name) \
 199 static DEVICE_ATTR_RO(_name)
 200
 201 #define CXACRU_CMD_INIT(_name) \
 202 static DEVICE_ATTR_RW(_name)
 203
 204 #define CXACRU_SET_INIT(_name) \
 205 static DEVICE_ATTR_WO(_name)
 206
 207 #define CXACRU_ATTR_INIT(_value, _type, _name) \
 208 static ssize_t _name##_show(struct device *dev, \
 209         struct device_attribute *attr, char *buf) \
 210 { \
 211         struct cxacru_data *instance = to_usbatm_driver_data(\
 212                 to_usb_interface(dev)); \
 213 \
 214         if (instance == NULL) \
 215                 return -ENODEV; \
 216 \
 217         return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
 218 } \
 219 CXACRU__ATTR_INIT(_name)
 220
 221 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
 222 #define CXACRU_CMD_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 223 #define CXACRU_SET_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 224 #define CXACRU__ATTR_CREATE(_name)        CXACRU_DEVICE_CREATE_FILE(_name)
 225
 226 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
 227 #define CXACRU_CMD_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 228 #define CXACRU_SET_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 229 #define CXACRU__ATTR_REMOVE(_name)        CXACRU_DEVICE_REMOVE_FILE(_name)
 230
 231 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
 232 {
 233         return sprintf(buf, "%u\n", value);
 234 }
 235
 236 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
 237 {
 238         return sprintf(buf, "%d\n", value);
 239 }
 240
 241 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
 242 {
 243         if (likely(value >= 0)) {
 244                 return snprintf(buf, PAGE_SIZE, "%u.%02u\n",
 245                                         value / 100, value % 100);
 246         } else {
 247                 value = -value;
 248                 return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",
 249                                         value / 100, value % 100);
 250         }
 251 }
 252
 253 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 254 {
 255         static char *str[] = { "no", "yes" };
 256
 257         if (unlikely(value >= ARRAY_SIZE(str)))
 258                 return sprintf(buf, "%u\n", value);
 259         return sprintf(buf, "%s\n", str[value]);
 260 }
 261
 262 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 263 {
 264         static char *str[] = { NULL, "not connected", "connected", "lost" };
 265
 266         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 267                 return sprintf(buf, "%u\n", value);
 268         return sprintf(buf, "%s\n", str[value]);
 269 }
 270
 271 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 272 {
 273         static char *str[] = { "down", "attempting to activate",
 274                 "training", "channel analysis", "exchange", "up",
 275                 "waiting", "initialising"
 276         };
 277         if (unlikely(value >= ARRAY_SIZE(str)))
 278                 return sprintf(buf, "%u\n", value);
 279         return sprintf(buf, "%s\n", str[value]);
 280 }
 281
 282 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 283 {
 284         static char *str[] = {
 285                         "",
 286                         "ANSI T1.413",
 287                         "ITU-T G.992.1 (G.DMT)",
 288                         "ITU-T G.992.2 (G.LITE)"
 289         };
 290         if (unlikely(value >= ARRAY_SIZE(str)))
 291                 return sprintf(buf, "%u\n", value);
 292         return sprintf(buf, "%s\n", str[value]);
 293 }
 294
 295 /*
 296  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 297  * this data is already in atm_dev there's no point.
 298  *
 299  * MAC_ADDRESS_HIGH = 0x????5544
 300  * MAC_ADDRESS_LOW  = 0x33221100
 301  * Where 00-55 are bytes 0-5 of the MAC.
 302  */
 303 static ssize_t mac_address_show(struct device *dev,
 304         struct device_attribute *attr, char *buf)
 305 {
 306         struct cxacru_data *instance = to_usbatm_driver_data(
 307                         to_usb_interface(dev));
 308
 309         if (instance == NULL || instance->usbatm->atm_dev == NULL)
 310                 return -ENODEV;
 311
 312         return sprintf(buf, "%pM\n", instance->usbatm->atm_dev->esi);
 313 }
 314
 315 static ssize_t adsl_state_show(struct device *dev,
 316         struct device_attribute *attr, char *buf)
 317 {
 318         static char *str[] = { "running", "stopped" };
 319         struct cxacru_data *instance = to_usbatm_driver_data(
 320                         to_usb_interface(dev));
 321         u32 value;
 322
 323         if (instance == NULL)
 324                 return -ENODEV;
 325
 326         value = instance->card_info[CXINF_LINE_STARTABLE];
 327         if (unlikely(value >= ARRAY_SIZE(str)))
 328                 return sprintf(buf, "%u\n", value);
 329         return sprintf(buf, "%s\n", str[value]);
 330 }
 331
 332 static ssize_t adsl_state_store(struct device *dev,
 333         struct device_attribute *attr, const char *buf, size_t count)
 334 {
 335         struct cxacru_data *instance = to_usbatm_driver_data(
 336                         to_usb_interface(dev));
 337         int ret;
 338         int poll = -1;
 339         char str_cmd[8];
 340         int len = strlen(buf);
 341
 342         if (!capable(CAP_NET_ADMIN))
 343                 return -EACCES;
 344
 345         ret = sscanf(buf, "%7s", str_cmd);
 346         if (ret != 1)
 347                 return -EINVAL;
 348         ret = 0;
 349
 350         if (instance == NULL)
 351                 return -ENODEV;
 352
 353         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 354                 return -ERESTARTSYS;
 355
 356         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 357                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 358                 if (ret < 0) {
 359                         atm_err(instance->usbatm, "change adsl state:"
 360                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 361
 362                         ret = -EIO;
 363                 } else {
 364                         ret = len;
 365                         poll = CXPOLL_STOPPED;
 366                 }
 367         }
 368
 369         /* Line status is only updated every second
 370          * and the device appears to only react to
 371          * START/STOP every second too. Wait 1.5s to
 372          * be sure that restart will have an effect. */
 373         if (!strcmp(str_cmd, "restart"))
 374                 msleep(1500);
 375
 376         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 377                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 378                 if (ret < 0) {
 379                         atm_err(instance->usbatm, "change adsl state:"
 380                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 381
 382                         ret = -EIO;
 383                 } else {
 384                         ret = len;
 385                         poll = CXPOLL_POLLING;
 386                 }
 387         }
 388
 389         if (!strcmp(str_cmd, "poll")) {
 390                 ret = len;
 391                 poll = CXPOLL_POLLING;
 392         }
 393
 394         if (ret == 0) {
 395                 ret = -EINVAL;
 396                 poll = -1;
 397         }
 398
 399         if (poll == CXPOLL_POLLING) {
 400                 mutex_lock(&instance->poll_state_serialize);
 401                 switch (instance->poll_state) {
 402                 case CXPOLL_STOPPED:
 403                         /* start polling */
 404                         instance->poll_state = CXPOLL_POLLING;
 405                         break;
 406
 407                 case CXPOLL_STOPPING:
 408                         /* abort stop request */
 409                         instance->poll_state = CXPOLL_POLLING;
 410                         fallthrough;
 411                 case CXPOLL_POLLING:
 412                 case CXPOLL_SHUTDOWN:
 413                         /* don't start polling */
 414                         poll = -1;
 415                 }
 416                 mutex_unlock(&instance->poll_state_serialize);
 417         } else if (poll == CXPOLL_STOPPED) {
 418                 mutex_lock(&instance->poll_state_serialize);
 419                 /* request stop */
 420                 if (instance->poll_state == CXPOLL_POLLING)
 421                         instance->poll_state = CXPOLL_STOPPING;
 422                 mutex_unlock(&instance->poll_state_serialize);
 423         }
 424
 425         mutex_unlock(&instance->adsl_state_serialize);
 426
 427         if (poll == CXPOLL_POLLING)
 428                 cxacru_poll_status(&instance->poll_work.work);
 429
 430         return ret;
 431 }
 432
 433 /* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
 434
 435 static ssize_t adsl_config_store(struct device *dev,
 436         struct device_attribute *attr, const char *buf, size_t count)
 437 {
 438         struct cxacru_data *instance = to_usbatm_driver_data(
 439                         to_usb_interface(dev));
 440         int len = strlen(buf);
 441         int ret, pos, num;
 442         __le32 data[CMD_PACKET_SIZE / 4];
 443
 444         if (!capable(CAP_NET_ADMIN))
 445                 return -EACCES;
 446
 447         if (instance == NULL)
 448                 return -ENODEV;
 449
 450         pos = 0;
 451         num = 0;
 452         while (pos < len) {
 453                 int tmp;
 454                 u32 index;
 455                 u32 value;
 456
 457                 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
 458                 if (ret < 2)
 459                         return -EINVAL;
 460                 if (index > 0x7f)
 461                         return -EINVAL;
 462                 if (tmp < 0 || tmp > len - pos)
 463                         return -EINVAL;
 464                 pos += tmp;
 465
 466                 /* skip trailing newline */
 467                 if (buf[pos] == '\n' && pos == len-1)
 468                         pos++;
 469
 470                 data[num * 2 + 1] = cpu_to_le32(index);
 471                 data[num * 2 + 2] = cpu_to_le32(value);
 472                 num++;
 473
 474                 /* send config values when data buffer is full
 475                  * or no more data
 476                  */
 477                 if (pos >= len || num >= CMD_MAX_CONFIG) {
 478                         char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
 479
 480                         data[0] = cpu_to_le32(num);
 481                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 482                                 (u8 *) data, 4 + num * 8, NULL, 0);
 483                         if (ret < 0) {
 484                                 atm_err(instance->usbatm,
 485                                         "set card data returned %d\n", ret);
 486                                 return -EIO;
 487                         }
 488
 489                         for (tmp = 0; tmp < num; tmp++)
 490                                 snprintf(log + tmp*12, 13, " %02x=%08x",
 491                                         le32_to_cpu(data[tmp * 2 + 1]),
 492                                         le32_to_cpu(data[tmp * 2 + 2]));
 493                         atm_info(instance->usbatm, "config%s\n", log);
 494                         num = 0;
 495                 }
 496         }
 497
 498         return len;
 499 }
 500
 501 /*
 502  * All device attributes are included in CXACRU_ALL_FILES
 503  * so that the same list can be used multiple times:
 504  *     INIT   (define the device attributes)
 505  *     CREATE (create all the device files)
 506  *     REMOVE (remove all the device files)
 507  *
 508  * With the last two being defined as needed in the functions
 509  * they are used in before calling CXACRU_ALL_FILES()
 510  */
 511 #define CXACRU_ALL_FILES(_action) \
 512 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 513 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 514 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 515 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 516 CXACRU__ATTR_##_action(                                      mac_address); \
 517 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 518 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 519 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 520 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 521 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 522 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 523 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 524 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 525 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 526 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 527 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 528 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 529 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 530 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 531 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 532 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 533 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 534 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 535 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 536 CXACRU_CMD_##_action(                                        adsl_state); \
 537 CXACRU_SET_##_action(                                        adsl_config);
 538
 539 CXACRU_ALL_FILES(INIT);
 540
 541 static struct attribute *cxacru_attrs[] = {
 542         &dev_attr_adsl_config.attr,
 543         &dev_attr_adsl_state.attr,
 544         &dev_attr_adsl_controller_version.attr,
 545         &dev_attr_adsl_headend_environment.attr,
 546         &dev_attr_adsl_headend.attr,
 547         &dev_attr_modulation.attr,
 548         &dev_attr_line_startable.attr,
 549         &dev_attr_downstream_hec_errors.attr,
 550         &dev_attr_upstream_hec_errors.attr,
 551         &dev_attr_downstream_fec_errors.attr,
 552         &dev_attr_upstream_fec_errors.attr,
 553         &dev_attr_downstream_crc_errors.attr,
 554         &dev_attr_upstream_crc_errors.attr,
 555         &dev_attr_startup_attempts.attr,
 556         &dev_attr_downstream_bits_per_frame.attr,
 557         &dev_attr_upstream_bits_per_frame.attr,
 558         &dev_attr_transmitter_power.attr,
 559         &dev_attr_downstream_attenuation.attr,
 560         &dev_attr_upstream_attenuation.attr,
 561         &dev_attr_downstream_snr_margin.attr,
 562         &dev_attr_upstream_snr_margin.attr,
 563         &dev_attr_mac_address.attr,
 564         &dev_attr_line_status.attr,
 565         &dev_attr_link_status.attr,
 566         &dev_attr_upstream_rate.attr,
 567         &dev_attr_downstream_rate.attr,
 568         NULL,
 569 };
 570 ATTRIBUTE_GROUPS(cxacru);
 571
 572 /* the following three functions are stolen from drivers/usb/core/message.c */
 573 static void cxacru_blocking_completion(struct urb *urb)
 574 {
 575         complete(urb->context);
 576 }
 577
 578 struct cxacru_timer {
 579         struct timer_list timer;
 580         struct urb *urb;
 581 };
 582
 583 static void cxacru_timeout_kill(struct timer_list *t)
 584 {
 585         struct cxacru_timer *timer = from_timer(timer, t, timer);
 586
 587         usb_unlink_urb(timer->urb);
 588 }
 589
 590 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 591                                  int *actual_length)
 592 {
 593         struct cxacru_timer timer = {
 594                 .urb = urb,
 595         };
 596
 597         timer_setup_on_stack(&timer.timer, cxacru_timeout_kill, 0);
 598         mod_timer(&timer.timer, jiffies + msecs_to_jiffies(CMD_TIMEOUT));
 599         wait_for_completion(done);
 600         del_timer_sync(&timer.timer);
 601         destroy_timer_on_stack(&timer.timer);
 602
 603         if (actual_length)
 604                 *actual_length = urb->actual_length;
 605         return urb->status; /* must read status after completion */
 606 }
 607
 608 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 609                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 610 {
 611         int ret, actlen;
 612         int offb, offd;
 613         const int stride = CMD_PACKET_SIZE - 4;
 614         u8 *wbuf = instance->snd_buf;
 615         u8 *rbuf = instance->rcv_buf;
 616         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 617         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 618
 619         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 620                 if (printk_ratelimit())
 621                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
 622                                 wbuflen, rbuflen);
 623                 ret = -ENOMEM;
 624                 goto err;
 625         }
 626
 627         mutex_lock(&instance->cm_serialize);
 628
 629         /* submit reading urb before the writing one */
 630         init_completion(&instance->rcv_done);
 631         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 632         if (ret < 0) {
 633                 if (printk_ratelimit())
 634                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
 635                                 cm, ret);
 636                 goto fail;
 637         }
 638
 639         memset(wbuf, 0, wbuflen);
 640         /* handle wsize == 0 */
 641         wbuf[0] = cm;
 642         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 643                 wbuf[offb] = cm;
 644                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 645         }
 646
 647         instance->snd_urb->transfer_buffer_length = wbuflen;
 648         init_completion(&instance->snd_done);
 649         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 650         if (ret < 0) {
 651                 if (printk_ratelimit())
 652                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
 653                                 cm, ret);
 654                 goto fail;
 655         }
 656
 657         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 658         if (ret < 0) {
 659                 if (printk_ratelimit())
 660                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
 661                 goto fail;
 662         }
 663
 664         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 665         if (ret < 0) {
 666                 if (printk_ratelimit())
 667                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
 668                 goto fail;
 669         }
 670         if (actlen % CMD_PACKET_SIZE || !actlen) {
 671                 if (printk_ratelimit())
 672                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
 673                                 cm, actlen);
 674                 ret = -EIO;
 675                 goto fail;
 676         }
 677
 678         /* check the return status and copy the data to the output buffer, if needed */
 679         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 680                 if (rbuf[offb] != cm) {
 681                         if (printk_ratelimit())
 682                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
 683                                         rbuf[offb], cm);
 684                         ret = -EIO;
 685                         goto fail;
 686                 }
 687                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 688                         if (printk_ratelimit())
 689                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
 690                                         cm, rbuf[offb + 1]);
 691                         ret = -EIO;
 692                         goto fail;
 693                 }
 694                 if (offd >= rsize)
 695                         break;
 696                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 697                 offd += stride;
 698         }
 699
 700         ret = offd;
 701         usb_dbg(instance->usbatm, "cm %#x\n", cm);
 702 fail:
 703         mutex_unlock(&instance->cm_serialize);
 704 err:
 705         return ret;
 706 }
 707
 708 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 709                                u32 *data, int size)
 710 {
 711         int ret, len;
 712         __le32 *buf;
 713         int offb;
 714         unsigned int offd;
 715         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 716         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 717
 718         buf = kmalloc(buflen, GFP_KERNEL);
 719         if (!buf)
 720                 return -ENOMEM;
 721
 722         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 723         if (ret < 0)
 724                 goto cleanup;
 725
 726         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 727         len = ret / 4;
 728         for (offb = 0; offb < len; ) {
 729                 int l = le32_to_cpu(buf[offb++]);
 730
 731                 if (l < 0 || l > stride || l > (len - offb) / 2) {
 732                         if (printk_ratelimit())
 733                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
 734                                         cm, l);
 735                         ret = -EIO;
 736                         goto cleanup;
 737                 }
 738                 while (l--) {
 739                         offd = le32_to_cpu(buf[offb++]);
 740                         if (offd >= size) {
 741                                 if (printk_ratelimit())
 742                                         usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
 743                                                 offd, cm);
 744                                 ret = -EIO;
 745                                 goto cleanup;
 746                         }
 747                         data[offd] = le32_to_cpu(buf[offb++]);
 748                 }
 749         }
 750
 751         ret = 0;
 752
 753 cleanup:
 754         kfree(buf);
 755         return ret;
 756 }
 757
 758 static int cxacru_card_status(struct cxacru_data *instance)
 759 {
 760         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 761
 762         if (ret < 0) {          /* firmware not loaded */
 763                 usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
 764                 return ret;
 765         }
 766         return 0;
 767 }
 768
 769 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 770                 struct atm_dev *atm_dev)
 771 {
 772         struct cxacru_data *instance = usbatm_instance->driver_data;
 773         struct usb_interface *intf = usbatm_instance->usb_intf;
 774         int ret;
 775         int start_polling = 1;
 776
 777         dev_dbg(&intf->dev, "%s\n", __func__);
 778
 779         /* Read MAC address */
 780         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 781                         atm_dev->esi, sizeof(atm_dev->esi));
 782         if (ret < 0) {
 783                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 784                 return ret;
 785         }
 786
 787         /* start ADSL */
 788         mutex_lock(&instance->adsl_state_serialize);
 789         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 790         if (ret < 0)
 791                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 792
 793         /* Start status polling */
 794         mutex_lock(&instance->poll_state_serialize);
 795         switch (instance->poll_state) {
 796         case CXPOLL_STOPPED:
 797                 /* start polling */
 798                 instance->poll_state = CXPOLL_POLLING;
 799                 break;
 800
 801         case CXPOLL_STOPPING:
 802                 /* abort stop request */
 803                 instance->poll_state = CXPOLL_POLLING;
 804                 fallthrough;
 805         case CXPOLL_POLLING:
 806         case CXPOLL_SHUTDOWN:
 807                 /* don't start polling */
 808                 start_polling = 0;
 809         }
 810         mutex_unlock(&instance->poll_state_serialize);
 811         mutex_unlock(&instance->adsl_state_serialize);
 812
 813         if (start_polling)
 814                 cxacru_poll_status(&instance->poll_work.work);
 815         return 0;
 816 }
 817
 818 static void cxacru_poll_status(struct work_struct *work)
 819 {
 820         struct cxacru_data *instance =
 821                 container_of(work, struct cxacru_data, poll_work.work);
 822         u32 buf[CXINF_MAX] = {};
 823         struct usbatm_data *usbatm = instance->usbatm;
 824         struct atm_dev *atm_dev = usbatm->atm_dev;
 825         int keep_polling = 1;
 826         int ret;
 827
 828         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 829         if (ret < 0) {
 830                 if (ret != -ESHUTDOWN)
 831                         atm_warn(usbatm, "poll status: error %d\n", ret);
 832
 833                 mutex_lock(&instance->poll_state_serialize);
 834                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 835                         instance->poll_state = CXPOLL_STOPPED;
 836
 837                         if (ret != -ESHUTDOWN)
 838                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 839                                                 " to 'start' or 'poll' to resume\n");
 840                 }
 841                 mutex_unlock(&instance->poll_state_serialize);
 842                 goto reschedule;
 843         }
 844
 845         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 846
 847         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 848                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 849
 850                 switch (instance->adsl_status) {
 851                 case 0:
 852                         atm_info(usbatm, "ADSL state: running\n");
 853                         break;
 854
 855                 case 1:
 856                         atm_info(usbatm, "ADSL state: stopped\n");
 857                         break;
 858
 859                 default:
 860                         atm_info(usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 861                         break;
 862                 }
 863         }
 864
 865         if (instance->line_status == buf[CXINF_LINE_STATUS])
 866                 goto reschedule;
 867
 868         instance->line_status = buf[CXINF_LINE_STATUS];
 869         switch (instance->line_status) {
 870         case 0:
 871                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 872                 atm_info(usbatm, "ADSL line: down\n");
 873                 break;
 874
 875         case 1:
 876                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 877                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 878                 break;
 879
 880         case 2:
 881                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 882                 atm_info(usbatm, "ADSL line: training\n");
 883                 break;
 884
 885         case 3:
 886                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 887                 atm_info(usbatm, "ADSL line: channel analysis\n");
 888                 break;
 889
 890         case 4:
 891                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 892                 atm_info(usbatm, "ADSL line: exchange\n");
 893                 break;
 894
 895         case 5:
 896                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 897                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
 898
 899                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 900                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 901                 break;
 902
 903         case 6:
 904                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 905                 atm_info(usbatm, "ADSL line: waiting\n");
 906                 break;
 907
 908         case 7:
 909                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 910                 atm_info(usbatm, "ADSL line: initializing\n");
 911                 break;
 912
 913         default:
 914                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
 915                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 916                 break;
 917         }
 918 reschedule:
 919
 920         mutex_lock(&instance->poll_state_serialize);
 921         if (instance->poll_state == CXPOLL_STOPPING &&
 922                                 instance->adsl_status == 1 && /* stopped */
 923                                 instance->line_status == 0) /* down */
 924                 instance->poll_state = CXPOLL_STOPPED;
 925
 926         if (instance->poll_state == CXPOLL_STOPPED)
 927                 keep_polling = 0;
 928         mutex_unlock(&instance->poll_state_serialize);
 929
 930         if (keep_polling)
 931                 schedule_delayed_work(&instance->poll_work,
 932                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 933 }
 934
 935 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 936                      u8 code1, u8 code2, u32 addr, const u8 *data, int size)
 937 {
 938         int ret;
 939         u8 *buf;
 940         int offd, offb;
 941         const int stride = CMD_PACKET_SIZE - 8;
 942
 943         buf = (u8 *) __get_free_page(GFP_KERNEL);
 944         if (!buf)
 945                 return -ENOMEM;
 946
 947         offb = offd = 0;
 948         do {
 949                 int l = min_t(int, stride, size - offd);
 950
 951                 buf[offb++] = fw;
 952                 buf[offb++] = l;
 953                 buf[offb++] = code1;
 954                 buf[offb++] = code2;
 955                 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
 956                 offb += 4;
 957                 addr += l;
 958                 if (l)
 959                         memcpy(buf + offb, data + offd, l);
 960                 if (l < stride)
 961                         memset(buf + offb + l, 0, stride - l);
 962                 offb += stride;
 963                 offd += stride;
 964                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 965                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 966                                            buf, offb, NULL, CMD_TIMEOUT);
 967                         if (ret < 0) {
 968                                 dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);
 969                                 goto cleanup;
 970                         }
 971                         offb = 0;
 972                 }
 973         } while (offd < size);
 974         dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);
 975
 976         ret = 0;
 977
 978 cleanup:
 979         free_page((unsigned long) buf);
 980         return ret;
 981 }
 982
 983 static void cxacru_upload_firmware(struct cxacru_data *instance,
 984                                    const struct firmware *fw,
 985                                    const struct firmware *bp)
 986 {
 987         int ret;
 988         struct usbatm_data *usbatm = instance->usbatm;
 989         struct usb_device *usb_dev = usbatm->usb_dev;
 990         __le16 signature[] = { usb_dev->descriptor.idVendor,
 991                                usb_dev->descriptor.idProduct };
 992         __le32 val;
 993
 994         usb_dbg(usbatm, "%s\n", __func__);
 995
 996         /* FirmwarePllFClkValue */
 997         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 998         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 999         if (ret) {
1000                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
1001                 return;
1002         }
1003
1004         /* FirmwarePllBClkValue */
1005         val = cpu_to_le32(instance->modem_type->pll_b_clk);
1006         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1007         if (ret) {
1008                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1009                 return;
1010         }
1011
1012         /* Enable SDRAM */
1013         val = cpu_to_le32(SDRAM_ENA);
1014         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1015         if (ret) {
1016                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1017                 return;
1018         }
1019
1020         /* Firmware */
1021         usb_info(usbatm, "loading firmware\n");
1022         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1023         if (ret) {
1024                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1025                 return;
1026         }
1027
1028         /* Boot ROM patch */
1029         if (instance->modem_type->boot_rom_patch) {
1030                 usb_info(usbatm, "loading boot ROM patch\n");
1031                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1032                 if (ret) {
1033                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1034                         return;
1035                 }
1036         }
1037
1038         /* Signature */
1039         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1040         if (ret) {
1041                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1042                 return;
1043         }
1044
1045         usb_info(usbatm, "starting device\n");
1046         if (instance->modem_type->boot_rom_patch) {
1047                 val = cpu_to_le32(BR_ADDR);
1048                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1049         } else {
1050                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1051         }
1052         if (ret) {
1053                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1054                 return;
1055         }
1056
1057         /* Delay to allow firmware to start up. */
1058         msleep_interruptible(1000);
1059
1060         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1061         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1062         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1063         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1064
1065         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1066         if (ret < 0) {
1067                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1068                 return;
1069         }
1070 }
1071
1072 static int cxacru_find_firmware(struct cxacru_data *instance,
1073                                 char *phase, const struct firmware **fw_p)
1074 {
1075         struct usbatm_data *usbatm = instance->usbatm;
1076         struct device *dev = &usbatm->usb_intf->dev;
1077         char buf[16];
1078
1079         sprintf(buf, "/*(DEBLOBBED)*/", phase);
1080         usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
1081
1082         if (reject_firmware(fw_p, buf, dev)) {
1083                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1084                 return -ENOENT;
1085         }
1086
1087         usb_info(usbatm, "found firmware %s\n", buf);
1088
1089         return 0;
1090 }
1091
1092 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1093                              struct usb_interface *usb_intf)
1094 {
1095         const struct firmware *fw, *bp;
1096         struct cxacru_data *instance = usbatm_instance->driver_data;
1097         int ret = cxacru_find_firmware(instance, "fw", &fw);
1098
1099         if (ret) {
1100                 usb_warn(usbatm_instance, "firmware (/*(DEBLOBBED)*/) unavailable (system misconfigured?)\n");
1101                 return ret;
1102         }
1103
1104         if (instance->modem_type->boot_rom_patch) {
1105                 ret = cxacru_find_firmware(instance, "bp", &bp);
1106                 if (ret) {
1107                         usb_warn(usbatm_instance, "boot ROM patch (/*(DEBLOBBED)*/) unavailable (system misconfigured?)\n");
1108                         release_firmware(fw);
1109                         return ret;
1110                 }
1111         }
1112
1113         cxacru_upload_firmware(instance, fw, bp);
1114
1115         if (instance->modem_type->boot_rom_patch)
1116                 release_firmware(bp);
1117         release_firmware(fw);
1118
1119         ret = cxacru_card_status(instance);
1120         if (ret)
1121                 usb_dbg(usbatm_instance, "modem initialisation failed\n");
1122         else
1123                 usb_dbg(usbatm_instance, "done setting up the modem\n");
1124
1125         return ret;
1126 }
1127
1128 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1129                        struct usb_interface *intf, const struct usb_device_id *id)
1130 {
1131         struct cxacru_data *instance;
1132         struct usb_device *usb_dev = interface_to_usbdev(intf);
1133         struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1134         int ret;
1135
1136         /* instance init */
1137         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1138         if (!instance)
1139                 return -ENOMEM;
1140
1141         instance->usbatm = usbatm_instance;
1142         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1143
1144         mutex_init(&instance->poll_state_serialize);
1145         instance->poll_state = CXPOLL_STOPPED;
1146         instance->line_status = -1;
1147         instance->adsl_status = -1;
1148
1149         mutex_init(&instance->adsl_state_serialize);
1150
1151         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1152         if (!instance->rcv_buf) {
1153                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_buf\n");
1154                 ret = -ENOMEM;
1155                 goto fail;
1156         }
1157         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1158         if (!instance->snd_buf) {
1159                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_buf\n");
1160                 ret = -ENOMEM;
1161                 goto fail;
1162         }
1163         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1164         if (!instance->rcv_urb) {
1165                 ret = -ENOMEM;
1166                 goto fail;
1167         }
1168         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1169         if (!instance->snd_urb) {
1170                 ret = -ENOMEM;
1171                 goto fail;
1172         }
1173
1174         if (!cmd_ep) {
1175                 usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1176                 ret = -ENODEV;
1177                 goto fail;
1178         }
1179
1180         if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1181                         == USB_ENDPOINT_XFER_INT) {
1182                 usb_fill_int_urb(instance->rcv_urb,
1183                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1184                         instance->rcv_buf, PAGE_SIZE,
1185                         cxacru_blocking_completion, &instance->rcv_done, 1);
1186
1187                 usb_fill_int_urb(instance->snd_urb,
1188                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1189                         instance->snd_buf, PAGE_SIZE,
1190                         cxacru_blocking_completion, &instance->snd_done, 4);
1191         } else {
1192                 usb_fill_bulk_urb(instance->rcv_urb,
1193                         usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1194                         instance->rcv_buf, PAGE_SIZE,
1195                         cxacru_blocking_completion, &instance->rcv_done);
1196
1197                 usb_fill_bulk_urb(instance->snd_urb,
1198                         usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1199                         instance->snd_buf, PAGE_SIZE,
1200                         cxacru_blocking_completion, &instance->snd_done);
1201         }
1202
1203         mutex_init(&instance->cm_serialize);
1204
1205         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1206
1207         usbatm_instance->driver_data = instance;
1208
1209         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1210
1211         return 0;
1212
1213  fail:
1214         free_page((unsigned long) instance->snd_buf);
1215         free_page((unsigned long) instance->rcv_buf);
1216         usb_free_urb(instance->snd_urb);
1217         usb_free_urb(instance->rcv_urb);
1218         kfree(instance);
1219
1220         return ret;
1221 }
1222
1223 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1224                 struct usb_interface *intf)
1225 {
1226         struct cxacru_data *instance = usbatm_instance->driver_data;
1227         int is_polling = 1;
1228
1229         usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1230
1231         if (!instance) {
1232                 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1233                 return;
1234         }
1235
1236         mutex_lock(&instance->poll_state_serialize);
1237         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1238
1239         /* ensure that status polling continues unless
1240          * it has already stopped */
1241         if (instance->poll_state == CXPOLL_STOPPED)
1242                 is_polling = 0;
1243
1244         /* stop polling from being stopped or started */
1245         instance->poll_state = CXPOLL_SHUTDOWN;
1246         mutex_unlock(&instance->poll_state_serialize);
1247
1248         if (is_polling)
1249                 cancel_delayed_work_sync(&instance->poll_work);
1250
1251         usb_kill_urb(instance->snd_urb);
1252         usb_kill_urb(instance->rcv_urb);
1253         usb_free_urb(instance->snd_urb);
1254         usb_free_urb(instance->rcv_urb);
1255
1256         free_page((unsigned long) instance->snd_buf);
1257         free_page((unsigned long) instance->rcv_buf);
1258
1259         kfree(instance);
1260
1261         usbatm_instance->driver_data = NULL;
1262 }
1263
1264 static const struct cxacru_modem_type cxacru_cafe = {
1265         .pll_f_clk = 0x02d874df,
1266         .pll_b_clk = 0x0196a51a,
1267         .boot_rom_patch = 1,
1268 };
1269
1270 static const struct cxacru_modem_type cxacru_cb00 = {
1271         .pll_f_clk = 0x5,
1272         .pll_b_clk = 0x3,
1273         .boot_rom_patch = 0,
1274 };
1275
1276 static const struct usb_device_id cxacru_usb_ids[] = {
1277         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1278                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1279         },
1280         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1281                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1282         },
1283         { /* V = Conexant                       P = ADSL modem                          */
1284                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1285         },
1286         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1287                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1288         },
1289         { /* V = Conexant                       P = ADSL modem                          */
1290                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1291         },
1292         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1293                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1294         },
1295         { /* V = Olitec                         P = ADSL modem version 2                */
1296                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1297         },
1298         { /* V = Olitec                         P = ADSL modem version 3                */
1299                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1300         },
1301         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1302                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1303         },
1304         { /* V = Zoom                           P = 5510                                */
1305                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1306         },
1307         { /* V = Draytek                        P = Vigor 318                           */
1308                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1309         },
1310         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1311                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1312         },
1313         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1314                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1315         },
1316         { /* V = Aethra                         P = Starmodem UM1020                    */
1317                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1318         },
1319         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1320                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1321         },
1322         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1323                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1324         },
1325         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1326                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1327         },
1328         {}
1329 };
1330
1331 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1332
1333 static struct usbatm_driver cxacru_driver = {
1334         .driver_name    = cxacru_driver_name,
1335         .bind           = cxacru_bind,
1336         .heavy_init     = cxacru_heavy_init,
1337         .unbind         = cxacru_unbind,
1338         .atm_start      = cxacru_atm_start,
1339         .bulk_in        = CXACRU_EP_DATA,
1340         .bulk_out       = CXACRU_EP_DATA,
1341         .rx_padding     = 3,
1342         .tx_padding     = 11,
1343 };
1344
1345 static int cxacru_usb_probe(struct usb_interface *intf,
1346                 const struct usb_device_id *id)
1347 {
1348         struct usb_device *usb_dev = interface_to_usbdev(intf);
1349         char buf[15];
1350
1351         /* Avoid ADSL routers (cx82310_eth).
1352          * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1353          */
1354         if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1355                         && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1356                                 buf, sizeof(buf)) > 0) {
1357                 if (!strcmp(buf, "USB NET CARD")) {
1358                         dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1359                         return -ENODEV;
1360                 }
1361         }
1362
1363         return usbatm_usb_probe(intf, id, &cxacru_driver);
1364 }
1365
1366 static struct usb_driver cxacru_usb_driver = {
1367         .name           = cxacru_driver_name,
1368         .probe          = cxacru_usb_probe,
1369         .disconnect     = usbatm_usb_disconnect,
1370         .id_table       = cxacru_usb_ids,
1371         .dev_groups     = cxacru_groups,
1372 };
1373
1374 module_usb_driver(cxacru_usb_driver);
1375
1376 MODULE_AUTHOR(DRIVER_AUTHOR);
1377 MODULE_DESCRIPTION(DRIVER_DESC);
1378 MODULE_LICENSE("GPL");