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  *  Copyright (C) 2009 Simon Arlott
   9  *
  10  *  This program is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License as published by the Free
  12  *  Software Foundation; either version 2 of the License, or (at your option)
  13  *  any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  *  more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along with
  21  *  this program; if not, write to the Free Software Foundation, Inc., 59
  22  *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  *
  24  ******************************************************************************/
  25
  26 /*
  27  *  Credit is due for Josep Comas, who created the original patch to speedtch.c
  28  *  to support the different padding used by the AccessRunner (now generalized
  29  *  into usbatm), and the userspace firmware loading utility.
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/kernel.h>
  35 #include <linux/timer.h>
  36 #include <linux/errno.h>
  37 #include <linux/slab.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  "0.4"
  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 #define CMD_MAX_CONFIG          ((CMD_PACKET_SIZE / 4 - 1) / 2)
  56
  57 /* Addresses */
  58 #define PLLFCLK_ADDR    0x00350068
  59 #define PLLBCLK_ADDR    0x0035006c
  60 #define SDRAMEN_ADDR    0x00350010
  61 #define FW_ADDR         0x00801000
  62 #define BR_ADDR         0x00180600
  63 #define SIG_ADDR        0x00180500
  64 #define BR_STACK_ADDR   0x00187f10
  65
  66 /* Values */
  67 #define SDRAM_ENA       0x1
  68
  69 #define CMD_TIMEOUT     2000    /* msecs */
  70 #define POLL_INTERVAL   1       /* secs */
  71
  72 /* commands for interaction with the modem through the control channel before
  73  * firmware is loaded  */
  74 enum cxacru_fw_request {
  75         FW_CMD_ERR,
  76         FW_GET_VER,
  77         FW_READ_MEM,
  78         FW_WRITE_MEM,
  79         FW_RMW_MEM,
  80         FW_CHECKSUM_MEM,
  81         FW_GOTO_MEM,
  82 };
  83
  84 /* commands for interaction with the modem through the control channel once
  85  * firmware is loaded  */
  86 enum cxacru_cm_request {
  87         CM_REQUEST_UNDEFINED = 0x80,
  88         CM_REQUEST_TEST,
  89         CM_REQUEST_CHIP_GET_MAC_ADDRESS,
  90         CM_REQUEST_CHIP_GET_DP_VERSIONS,
  91         CM_REQUEST_CHIP_ADSL_LINE_START,
  92         CM_REQUEST_CHIP_ADSL_LINE_STOP,
  93         CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
  94         CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
  95         CM_REQUEST_CARD_INFO_GET,
  96         CM_REQUEST_CARD_DATA_GET,
  97         CM_REQUEST_CARD_DATA_SET,
  98         CM_REQUEST_COMMAND_HW_IO,
  99         CM_REQUEST_INTERFACE_HW_IO,
 100         CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
 101         CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
 102         CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
 103         CM_REQUEST_CARD_GET_STATUS,
 104         CM_REQUEST_CARD_GET_MAC_ADDRESS,
 105         CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
 106         CM_REQUEST_MAX,
 107 };
 108
 109 /* commands for interaction with the flash memory
 110  *
 111  * read:  response is the contents of the first 60 bytes of flash memory
 112  * write: request contains the 60 bytes of data to write to flash memory
 113  *        response is the contents of the first 60 bytes of flash memory
 114  *
 115  * layout: PP PP VV VV  MM MM MM MM  MM MM ?? ??  SS SS SS SS  SS SS SS SS
 116  *         SS SS SS SS  SS SS SS SS  00 00 00 00  00 00 00 00  00 00 00 00
 117  *         00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00
 118  *
 119  *   P: le16  USB Product ID
 120  *   V: le16  USB Vendor ID
 121  *   M: be48  MAC Address
 122  *   S: le16  ASCII Serial Number
 123  */
 124 enum cxacru_cm_flash {
 125         CM_FLASH_READ = 0xa1,
 126         CM_FLASH_WRITE = 0xa2
 127 };
 128
 129 /* reply codes to the commands above */
 130 enum cxacru_cm_status {
 131         CM_STATUS_UNDEFINED,
 132         CM_STATUS_SUCCESS,
 133         CM_STATUS_ERROR,
 134         CM_STATUS_UNSUPPORTED,
 135         CM_STATUS_UNIMPLEMENTED,
 136         CM_STATUS_PARAMETER_ERROR,
 137         CM_STATUS_DBG_LOOPBACK,
 138         CM_STATUS_MAX,
 139 };
 140
 141 /* indices into CARD_INFO_GET return array */
 142 enum cxacru_info_idx {
 143         CXINF_DOWNSTREAM_RATE,
 144         CXINF_UPSTREAM_RATE,
 145         CXINF_LINK_STATUS,
 146         CXINF_LINE_STATUS,
 147         CXINF_MAC_ADDRESS_HIGH,
 148         CXINF_MAC_ADDRESS_LOW,
 149         CXINF_UPSTREAM_SNR_MARGIN,
 150         CXINF_DOWNSTREAM_SNR_MARGIN,
 151         CXINF_UPSTREAM_ATTENUATION,
 152         CXINF_DOWNSTREAM_ATTENUATION,
 153         CXINF_TRANSMITTER_POWER,
 154         CXINF_UPSTREAM_BITS_PER_FRAME,
 155         CXINF_DOWNSTREAM_BITS_PER_FRAME,
 156         CXINF_STARTUP_ATTEMPTS,
 157         CXINF_UPSTREAM_CRC_ERRORS,
 158         CXINF_DOWNSTREAM_CRC_ERRORS,
 159         CXINF_UPSTREAM_FEC_ERRORS,
 160         CXINF_DOWNSTREAM_FEC_ERRORS,
 161         CXINF_UPSTREAM_HEC_ERRORS,
 162         CXINF_DOWNSTREAM_HEC_ERRORS,
 163         CXINF_LINE_STARTABLE,
 164         CXINF_MODULATION,
 165         CXINF_ADSL_HEADEND,
 166         CXINF_ADSL_HEADEND_ENVIRONMENT,
 167         CXINF_CONTROLLER_VERSION,
 168         /* dunno what the missing two mean */
 169         CXINF_MAX = 0x1c,
 170 };
 171
 172 enum cxacru_poll_state {
 173         CXPOLL_STOPPING,
 174         CXPOLL_STOPPED,
 175         CXPOLL_POLLING,
 176         CXPOLL_SHUTDOWN
 177 };
 178
 179 struct cxacru_modem_type {
 180         u32 pll_f_clk;
 181         u32 pll_b_clk;
 182         int boot_rom_patch;
 183 };
 184
 185 struct cxacru_data {
 186         struct usbatm_data *usbatm;
 187
 188         const struct cxacru_modem_type *modem_type;
 189
 190         int line_status;
 191         struct mutex adsl_state_serialize;
 192         int adsl_status;
 193         struct delayed_work poll_work;
 194         u32 card_info[CXINF_MAX];
 195         struct mutex poll_state_serialize;
 196         enum cxacru_poll_state poll_state;
 197
 198         /* contol handles */
 199         struct mutex cm_serialize;
 200         u8 *rcv_buf;
 201         u8 *snd_buf;
 202         struct urb *rcv_urb;
 203         struct urb *snd_urb;
 204         struct completion rcv_done;
 205         struct completion snd_done;
 206 };
 207
 208 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 209         u8 *wdata, int wsize, u8 *rdata, int rsize);
 210 static void cxacru_poll_status(struct work_struct *work);
 211
 212 /* Card info exported through sysfs */
 213 #define CXACRU__ATTR_INIT(_name) \
 214 static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
 215
 216 #define CXACRU_CMD_INIT(_name) \
 217 static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
 218         cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
 219
 220 #define CXACRU_SET_INIT(_name) \
 221 static DEVICE_ATTR(_name, S_IWUSR, \
 222         NULL, cxacru_sysfs_store_##_name)
 223
 224 #define CXACRU_ATTR_INIT(_value, _type, _name) \
 225 static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
 226         struct device_attribute *attr, char *buf) \
 227 { \
 228         struct cxacru_data *instance = to_usbatm_driver_data(\
 229                 to_usb_interface(dev)); \
 230 \
 231         if (instance == NULL) \
 232                 return -ENODEV; \
 233 \
 234         return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
 235 } \
 236 CXACRU__ATTR_INIT(_name)
 237
 238 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
 239 #define CXACRU_CMD_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 240 #define CXACRU_SET_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 241 #define CXACRU__ATTR_CREATE(_name)        CXACRU_DEVICE_CREATE_FILE(_name)
 242
 243 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
 244 #define CXACRU_CMD_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 245 #define CXACRU_SET_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 246 #define CXACRU__ATTR_REMOVE(_name)        CXACRU_DEVICE_REMOVE_FILE(_name)
 247
 248 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
 249 {
 250         return snprintf(buf, PAGE_SIZE, "%u\n", value);
 251 }
 252
 253 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
 254 {
 255         return snprintf(buf, PAGE_SIZE, "%d\n", value);
 256 }
 257
 258 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
 259 {
 260         if (likely(value >= 0)) {
 261                 return snprintf(buf, PAGE_SIZE, "%u.%02u\n",
 262                                         value / 100, value % 100);
 263         } else {
 264                 value = -value;
 265                 return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",
 266                                         value / 100, value % 100);
 267         }
 268 }
 269
 270 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 271 {
 272         static char *str[] = { "no", "yes" };
 273
 274         if (unlikely(value >= ARRAY_SIZE(str)))
 275                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 276         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 277 }
 278
 279 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 280 {
 281         static char *str[] = { NULL, "not connected", "connected", "lost" };
 282
 283         if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
 284                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 285         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 286 }
 287
 288 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 289 {
 290         static char *str[] = { "down", "attempting to activate",
 291                 "training", "channel analysis", "exchange", "up",
 292                 "waiting", "initialising"
 293         };
 294         if (unlikely(value >= ARRAY_SIZE(str)))
 295                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 296         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 297 }
 298
 299 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 300 {
 301         static char *str[] = {
 302                         "",
 303                         "ANSI T1.413",
 304                         "ITU-T G.992.1 (G.DMT)",
 305                         "ITU-T G.992.2 (G.LITE)"
 306         };
 307         if (unlikely(value >= ARRAY_SIZE(str)))
 308                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 309         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 310 }
 311
 312 /*
 313  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 314  * this data is already in atm_dev there's no point.
 315  *
 316  * MAC_ADDRESS_HIGH = 0x????5544
 317  * MAC_ADDRESS_LOW  = 0x33221100
 318  * Where 00-55 are bytes 0-5 of the MAC.
 319  */
 320 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
 321         struct device_attribute *attr, char *buf)
 322 {
 323         struct cxacru_data *instance = to_usbatm_driver_data(
 324                         to_usb_interface(dev));
 325
 326         if (instance == NULL || instance->usbatm->atm_dev == NULL)
 327                 return -ENODEV;
 328
 329         return snprintf(buf, PAGE_SIZE, "%pM\n",
 330                 instance->usbatm->atm_dev->esi);
 331 }
 332
 333 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
 334         struct device_attribute *attr, char *buf)
 335 {
 336         static char *str[] = { "running", "stopped" };
 337         struct cxacru_data *instance = to_usbatm_driver_data(
 338                         to_usb_interface(dev));
 339         u32 value;
 340
 341         if (instance == NULL)
 342                 return -ENODEV;
 343
 344         value = instance->card_info[CXINF_LINE_STARTABLE];
 345         if (unlikely(value >= ARRAY_SIZE(str)))
 346                 return snprintf(buf, PAGE_SIZE, "%u\n", value);
 347         return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
 348 }
 349
 350 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
 351         struct device_attribute *attr, const char *buf, size_t count)
 352 {
 353         struct cxacru_data *instance = to_usbatm_driver_data(
 354                         to_usb_interface(dev));
 355         int ret;
 356         int poll = -1;
 357         char str_cmd[8];
 358         int len = strlen(buf);
 359
 360         if (!capable(CAP_NET_ADMIN))
 361                 return -EACCES;
 362
 363         ret = sscanf(buf, "%7s", str_cmd);
 364         if (ret != 1)
 365                 return -EINVAL;
 366         ret = 0;
 367
 368         if (instance == NULL)
 369                 return -ENODEV;
 370
 371         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 372                 return -ERESTARTSYS;
 373
 374         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 375                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 376                 if (ret < 0) {
 377                         atm_err(instance->usbatm, "change adsl state:"
 378                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 379
 380                         ret = -EIO;
 381                 } else {
 382                         ret = len;
 383                         poll = CXPOLL_STOPPED;
 384                 }
 385         }
 386
 387         /* Line status is only updated every second
 388          * and the device appears to only react to
 389          * START/STOP every second too. Wait 1.5s to
 390          * be sure that restart will have an effect. */
 391         if (!strcmp(str_cmd, "restart"))
 392                 msleep(1500);
 393
 394         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 395                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 396                 if (ret < 0) {
 397                         atm_err(instance->usbatm, "change adsl state:"
 398                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 399
 400                         ret = -EIO;
 401                 } else {
 402                         ret = len;
 403                         poll = CXPOLL_POLLING;
 404                 }
 405         }
 406
 407         if (!strcmp(str_cmd, "poll")) {
 408                 ret = len;
 409                 poll = CXPOLL_POLLING;
 410         }
 411
 412         if (ret == 0) {
 413                 ret = -EINVAL;
 414                 poll = -1;
 415         }
 416
 417         if (poll == CXPOLL_POLLING) {
 418                 mutex_lock(&instance->poll_state_serialize);
 419                 switch (instance->poll_state) {
 420                 case CXPOLL_STOPPED:
 421                         /* start polling */
 422                         instance->poll_state = CXPOLL_POLLING;
 423                         break;
 424
 425                 case CXPOLL_STOPPING:
 426                         /* abort stop request */
 427                         instance->poll_state = CXPOLL_POLLING;
 428                 case CXPOLL_POLLING:
 429                 case CXPOLL_SHUTDOWN:
 430                         /* don't start polling */
 431                         poll = -1;
 432                 }
 433                 mutex_unlock(&instance->poll_state_serialize);
 434         } else if (poll == CXPOLL_STOPPED) {
 435                 mutex_lock(&instance->poll_state_serialize);
 436                 /* request stop */
 437                 if (instance->poll_state == CXPOLL_POLLING)
 438                         instance->poll_state = CXPOLL_STOPPING;
 439                 mutex_unlock(&instance->poll_state_serialize);
 440         }
 441
 442         mutex_unlock(&instance->adsl_state_serialize);
 443
 444         if (poll == CXPOLL_POLLING)
 445                 cxacru_poll_status(&instance->poll_work.work);
 446
 447         return ret;
 448 }
 449
 450 /* CM_REQUEST_CARD_DATA_GET times out, so no show attribute */
 451
 452 static ssize_t cxacru_sysfs_store_adsl_config(struct device *dev,
 453         struct device_attribute *attr, const char *buf, size_t count)
 454 {
 455         struct cxacru_data *instance = to_usbatm_driver_data(
 456                         to_usb_interface(dev));
 457         int len = strlen(buf);
 458         int ret, pos, num;
 459         __le32 data[CMD_PACKET_SIZE / 4];
 460
 461         if (!capable(CAP_NET_ADMIN))
 462                 return -EACCES;
 463
 464         if (instance == NULL)
 465                 return -ENODEV;
 466
 467         pos = 0;
 468         num = 0;
 469         while (pos < len) {
 470                 int tmp;
 471                 u32 index;
 472                 u32 value;
 473
 474                 ret = sscanf(buf + pos, "%x=%x%n", &index, &value, &tmp);
 475                 if (ret < 2)
 476                         return -EINVAL;
 477                 if (index < 0 || index > 0x7f)
 478                         return -EINVAL;
 479                 if (tmp < 0 || tmp > len - pos)
 480                         return -EINVAL;
 481                 pos += tmp;
 482
 483                 /* skip trailing newline */
 484                 if (buf[pos] == '\n' && pos == len-1)
 485                         pos++;
 486
 487                 data[num * 2 + 1] = cpu_to_le32(index);
 488                 data[num * 2 + 2] = cpu_to_le32(value);
 489                 num++;
 490
 491                 /* send config values when data buffer is full
 492                  * or no more data
 493                  */
 494                 if (pos >= len || num >= CMD_MAX_CONFIG) {
 495                         char log[CMD_MAX_CONFIG * 12 + 1]; /* %02x=%08x */
 496
 497                         data[0] = cpu_to_le32(num);
 498                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 499                                 (u8 *) data, 4 + num * 8, NULL, 0);
 500                         if (ret < 0) {
 501                                 atm_err(instance->usbatm,
 502                                         "set card data returned %d\n", ret);
 503                                 return -EIO;
 504                         }
 505
 506                         for (tmp = 0; tmp < num; tmp++)
 507                                 snprintf(log + tmp*12, 13, " %02x=%08x",
 508                                         le32_to_cpu(data[tmp * 2 + 1]),
 509                                         le32_to_cpu(data[tmp * 2 + 2]));
 510                         atm_info(instance->usbatm, "config%s\n", log);
 511                         num = 0;
 512                 }
 513         }
 514
 515         return len;
 516 }
 517
 518 /*
 519  * All device attributes are included in CXACRU_ALL_FILES
 520  * so that the same list can be used multiple times:
 521  *     INIT   (define the device attributes)
 522  *     CREATE (create all the device files)
 523  *     REMOVE (remove all the device files)
 524  *
 525  * With the last two being defined as needed in the functions
 526  * they are used in before calling CXACRU_ALL_FILES()
 527  */
 528 #define CXACRU_ALL_FILES(_action) \
 529 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 530 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 531 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 532 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 533 CXACRU__ATTR_##_action(                                      mac_address); \
 534 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 535 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 536 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 537 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 538 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 539 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 540 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 541 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 542 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 543 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 544 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 545 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 546 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 547 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 548 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 549 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 550 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 551 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 552 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 553 CXACRU_CMD_##_action(                                        adsl_state); \
 554 CXACRU_SET_##_action(                                        adsl_config);
 555
 556 CXACRU_ALL_FILES(INIT);
 557
 558 /* the following three functions are stolen from drivers/usb/core/message.c */
 559 static void cxacru_blocking_completion(struct urb *urb)
 560 {
 561         complete(urb->context);
 562 }
 563
 564 static void cxacru_timeout_kill(unsigned long data)
 565 {
 566         usb_unlink_urb((struct urb *) data);
 567 }
 568
 569 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 570                                  int *actual_length)
 571 {
 572         struct timer_list timer;
 573
 574         init_timer(&timer);
 575         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
 576         timer.data = (unsigned long) urb;
 577         timer.function = cxacru_timeout_kill;
 578         add_timer(&timer);
 579         wait_for_completion(done);
 580         del_timer_sync(&timer);
 581
 582         if (actual_length)
 583                 *actual_length = urb->actual_length;
 584         return urb->status; /* must read status after completion */
 585 }
 586
 587 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 588                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 589 {
 590         int ret, actlen;
 591         int offb, offd;
 592         const int stride = CMD_PACKET_SIZE - 4;
 593         u8 *wbuf = instance->snd_buf;
 594         u8 *rbuf = instance->rcv_buf;
 595         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 596         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 597
 598         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 599                 if (printk_ratelimit())
 600                         usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",
 601                                 wbuflen, rbuflen);
 602                 ret = -ENOMEM;
 603                 goto err;
 604         }
 605
 606         mutex_lock(&instance->cm_serialize);
 607
 608         /* submit reading urb before the writing one */
 609         init_completion(&instance->rcv_done);
 610         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 611         if (ret < 0) {
 612                 if (printk_ratelimit())
 613                         usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",
 614                                 cm, ret);
 615                 goto fail;
 616         }
 617
 618         memset(wbuf, 0, wbuflen);
 619         /* handle wsize == 0 */
 620         wbuf[0] = cm;
 621         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 622                 wbuf[offb] = cm;
 623                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 624         }
 625
 626         instance->snd_urb->transfer_buffer_length = wbuflen;
 627         init_completion(&instance->snd_done);
 628         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 629         if (ret < 0) {
 630                 if (printk_ratelimit())
 631                         usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",
 632                                 cm, ret);
 633                 goto fail;
 634         }
 635
 636         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 637         if (ret < 0) {
 638                 if (printk_ratelimit())
 639                         usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);
 640                 goto fail;
 641         }
 642
 643         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 644         if (ret < 0) {
 645                 if (printk_ratelimit())
 646                         usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);
 647                 goto fail;
 648         }
 649         if (actlen % CMD_PACKET_SIZE || !actlen) {
 650                 if (printk_ratelimit())
 651                         usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",
 652                                 cm, actlen);
 653                 ret = -EIO;
 654                 goto fail;
 655         }
 656
 657         /* check the return status and copy the data to the output buffer, if needed */
 658         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 659                 if (rbuf[offb] != cm) {
 660                         if (printk_ratelimit())
 661                                 usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",
 662                                         rbuf[offb], cm);
 663                         ret = -EIO;
 664                         goto fail;
 665                 }
 666                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 667                         if (printk_ratelimit())
 668                                 usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",
 669                                         cm, rbuf[offb + 1]);
 670                         ret = -EIO;
 671                         goto fail;
 672                 }
 673                 if (offd >= rsize)
 674                         break;
 675                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 676                 offd += stride;
 677         }
 678
 679         ret = offd;
 680         usb_dbg(instance->usbatm, "cm %#x\n", cm);
 681 fail:
 682         mutex_unlock(&instance->cm_serialize);
 683 err:
 684         return ret;
 685 }
 686
 687 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 688                                u32 *data, int size)
 689 {
 690         int ret, len;
 691         __le32 *buf;
 692         int offb;
 693         unsigned int offd;
 694         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 695         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 696
 697         buf = kmalloc(buflen, GFP_KERNEL);
 698         if (!buf)
 699                 return -ENOMEM;
 700
 701         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 702         if (ret < 0)
 703                 goto cleanup;
 704
 705         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 706         len = ret / 4;
 707         for (offb = 0; offb < len; ) {
 708                 int l = le32_to_cpu(buf[offb++]);
 709
 710                 if (l < 0 || l > stride || l > (len - offb) / 2) {
 711                         if (printk_ratelimit())
 712                                 usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",
 713                                         cm, l);
 714                         ret = -EIO;
 715                         goto cleanup;
 716                 }
 717                 while (l--) {
 718                         offd = le32_to_cpu(buf[offb++]);
 719                         if (offd >= size) {
 720                                 if (printk_ratelimit())
 721                                         usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",
 722                                                 offd, cm);
 723                                 ret = -EIO;
 724                                 goto cleanup;
 725                         }
 726                         data[offd] = le32_to_cpu(buf[offb++]);
 727                 }
 728         }
 729
 730         ret = 0;
 731
 732 cleanup:
 733         kfree(buf);
 734         return ret;
 735 }
 736
 737 static int cxacru_card_status(struct cxacru_data *instance)
 738 {
 739         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 740
 741         if (ret < 0) {          /* firmware not loaded */
 742                 usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);
 743                 return ret;
 744         }
 745         return 0;
 746 }
 747
 748 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 749                 struct atm_dev *atm_dev)
 750 {
 751         struct usb_interface *intf = usbatm_instance->usb_intf;
 752
 753         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 754                 device_remove_file(&intf->dev, &dev_attr_##_name);
 755         CXACRU_ALL_FILES(REMOVE);
 756         #undef CXACRU_DEVICE_REMOVE_FILE
 757 }
 758
 759 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 760                 struct atm_dev *atm_dev)
 761 {
 762         struct cxacru_data *instance = usbatm_instance->driver_data;
 763         struct usb_interface *intf = usbatm_instance->usb_intf;
 764         int ret;
 765         int start_polling = 1;
 766
 767         dev_dbg(&intf->dev, "%s\n", __func__);
 768
 769         /* Read MAC address */
 770         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 771                         atm_dev->esi, sizeof(atm_dev->esi));
 772         if (ret < 0) {
 773                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 774                 return ret;
 775         }
 776
 777         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 778                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 779                 if (unlikely(ret)) \
 780                         goto fail_sysfs;
 781         CXACRU_ALL_FILES(CREATE);
 782         #undef CXACRU_DEVICE_CREATE_FILE
 783
 784         /* start ADSL */
 785         mutex_lock(&instance->adsl_state_serialize);
 786         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 787         if (ret < 0)
 788                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 789
 790         /* Start status polling */
 791         mutex_lock(&instance->poll_state_serialize);
 792         switch (instance->poll_state) {
 793         case CXPOLL_STOPPED:
 794                 /* start polling */
 795                 instance->poll_state = CXPOLL_POLLING;
 796                 break;
 797
 798         case CXPOLL_STOPPING:
 799                 /* abort stop request */
 800                 instance->poll_state = CXPOLL_POLLING;
 801         case CXPOLL_POLLING:
 802         case CXPOLL_SHUTDOWN:
 803                 /* don't start polling */
 804                 start_polling = 0;
 805         }
 806         mutex_unlock(&instance->poll_state_serialize);
 807         mutex_unlock(&instance->adsl_state_serialize);
 808
 809         printk(KERN_INFO "%s%d: %s %pM\n", atm_dev->type, atm_dev->number,
 810                         usbatm_instance->description, atm_dev->esi);
 811
 812         if (start_polling)
 813                 cxacru_poll_status(&instance->poll_work.work);
 814         return 0;
 815
 816 fail_sysfs:
 817         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 818         cxacru_remove_device_files(usbatm_instance, atm_dev);
 819         return ret;
 820 }
 821
 822 static void cxacru_poll_status(struct work_struct *work)
 823 {
 824         struct cxacru_data *instance =
 825                 container_of(work, struct cxacru_data, poll_work.work);
 826         u32 buf[CXINF_MAX] = {};
 827         struct usbatm_data *usbatm = instance->usbatm;
 828         struct atm_dev *atm_dev = usbatm->atm_dev;
 829         int keep_polling = 1;
 830         int ret;
 831
 832         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 833         if (ret < 0) {
 834                 if (ret != -ESHUTDOWN)
 835                         atm_warn(usbatm, "poll status: error %d\n", ret);
 836
 837                 mutex_lock(&instance->poll_state_serialize);
 838                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 839                         instance->poll_state = CXPOLL_STOPPED;
 840
 841                         if (ret != -ESHUTDOWN)
 842                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 843                                                 " to 'start' or 'poll' to resume\n");
 844                 }
 845                 mutex_unlock(&instance->poll_state_serialize);
 846                 goto reschedule;
 847         }
 848
 849         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 850
 851         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 852                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 853
 854                 switch (instance->adsl_status) {
 855                 case 0:
 856                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 857                         break;
 858
 859                 case 1:
 860                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 861                         break;
 862
 863                 default:
 864                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 865                         break;
 866                 }
 867         }
 868
 869         if (instance->line_status == buf[CXINF_LINE_STATUS])
 870                 goto reschedule;
 871
 872         instance->line_status = buf[CXINF_LINE_STATUS];
 873         switch (instance->line_status) {
 874         case 0:
 875                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 876                 atm_info(usbatm, "ADSL line: down\n");
 877                 break;
 878
 879         case 1:
 880                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 881                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 882                 break;
 883
 884         case 2:
 885                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 886                 atm_info(usbatm, "ADSL line: training\n");
 887                 break;
 888
 889         case 3:
 890                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 891                 atm_info(usbatm, "ADSL line: channel analysis\n");
 892                 break;
 893
 894         case 4:
 895                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 896                 atm_info(usbatm, "ADSL line: exchange\n");
 897                 break;
 898
 899         case 5:
 900                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 901                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
 902
 903                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 904                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 905                 break;
 906
 907         case 6:
 908                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 909                 atm_info(usbatm, "ADSL line: waiting\n");
 910                 break;
 911
 912         case 7:
 913                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
 914                 atm_info(usbatm, "ADSL line: initializing\n");
 915                 break;
 916
 917         default:
 918                 atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
 919                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 920                 break;
 921         }
 922 reschedule:
 923
 924         mutex_lock(&instance->poll_state_serialize);
 925         if (instance->poll_state == CXPOLL_STOPPING &&
 926                                 instance->adsl_status == 1 && /* stopped */
 927                                 instance->line_status == 0) /* down */
 928                 instance->poll_state = CXPOLL_STOPPED;
 929
 930         if (instance->poll_state == CXPOLL_STOPPED)
 931                 keep_polling = 0;
 932         mutex_unlock(&instance->poll_state_serialize);
 933
 934         if (keep_polling)
 935                 schedule_delayed_work(&instance->poll_work,
 936                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 937 }
 938
 939 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 940                      u8 code1, u8 code2, u32 addr, const u8 *data, int size)
 941 {
 942         int ret;
 943         u8 *buf;
 944         int offd, offb;
 945         const int stride = CMD_PACKET_SIZE - 8;
 946
 947         buf = (u8 *) __get_free_page(GFP_KERNEL);
 948         if (!buf)
 949                 return -ENOMEM;
 950
 951         offb = offd = 0;
 952         do {
 953                 int l = min_t(int, stride, size - offd);
 954
 955                 buf[offb++] = fw;
 956                 buf[offb++] = l;
 957                 buf[offb++] = code1;
 958                 buf[offb++] = code2;
 959                 put_unaligned(cpu_to_le32(addr), (__le32 *)(buf + offb));
 960                 offb += 4;
 961                 addr += l;
 962                 if (l)
 963                         memcpy(buf + offb, data + offd, l);
 964                 if (l < stride)
 965                         memset(buf + offb + l, 0, stride - l);
 966                 offb += stride;
 967                 offd += stride;
 968                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 969                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 970                                            buf, offb, NULL, CMD_TIMEOUT);
 971                         if (ret < 0) {
 972                                 dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);
 973                                 goto cleanup;
 974                         }
 975                         offb = 0;
 976                 }
 977         } while (offd < size);
 978         dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);
 979
 980         ret = 0;
 981
 982 cleanup:
 983         free_page((unsigned long) buf);
 984         return ret;
 985 }
 986
 987 static void cxacru_upload_firmware(struct cxacru_data *instance,
 988                                    const struct firmware *fw,
 989                                    const struct firmware *bp)
 990 {
 991         int ret;
 992         struct usbatm_data *usbatm = instance->usbatm;
 993         struct usb_device *usb_dev = usbatm->usb_dev;
 994         __le16 signature[] = { usb_dev->descriptor.idVendor,
 995                                usb_dev->descriptor.idProduct };
 996         __le32 val;
 997
 998         usb_dbg(usbatm, "%s\n", __func__);
 999
1000         /* FirmwarePllFClkValue */
1001         val = cpu_to_le32(instance->modem_type->pll_f_clk);
1002         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
1003         if (ret) {
1004                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
1005                 return;
1006         }
1007
1008         /* FirmwarePllBClkValue */
1009         val = cpu_to_le32(instance->modem_type->pll_b_clk);
1010         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
1011         if (ret) {
1012                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
1013                 return;
1014         }
1015
1016         /* Enable SDRAM */
1017         val = cpu_to_le32(SDRAM_ENA);
1018         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
1019         if (ret) {
1020                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
1021                 return;
1022         }
1023
1024         /* Firmware */
1025         usb_info(usbatm, "loading firmware\n");
1026         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
1027         if (ret) {
1028                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
1029                 return;
1030         }
1031
1032         /* Boot ROM patch */
1033         if (instance->modem_type->boot_rom_patch) {
1034                 usb_info(usbatm, "loading boot ROM patch\n");
1035                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
1036                 if (ret) {
1037                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
1038                         return;
1039                 }
1040         }
1041
1042         /* Signature */
1043         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
1044         if (ret) {
1045                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
1046                 return;
1047         }
1048
1049         usb_info(usbatm, "starting device\n");
1050         if (instance->modem_type->boot_rom_patch) {
1051                 val = cpu_to_le32(BR_ADDR);
1052                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
1053         } else {
1054                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
1055         }
1056         if (ret) {
1057                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
1058                 return;
1059         }
1060
1061         /* Delay to allow firmware to start up. */
1062         msleep_interruptible(1000);
1063
1064         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
1065         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
1066         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
1067         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
1068
1069         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
1070         if (ret < 0) {
1071                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
1072                 return;
1073         }
1074 }
1075
1076 static int cxacru_find_firmware(struct cxacru_data *instance,
1077                                 char *phase, const struct firmware **fw_p)
1078 {
1079         struct usbatm_data *usbatm = instance->usbatm;
1080         struct device *dev = &usbatm->usb_intf->dev;
1081         char buf[16];
1082
1083         sprintf(buf, "cxacru-%s.bin", phase);
1084         usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf);
1085
1086         if (request_firmware(fw_p, buf, dev)) {
1087                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
1088                 return -ENOENT;
1089         }
1090
1091         usb_info(usbatm, "found firmware %s\n", buf);
1092
1093         return 0;
1094 }
1095
1096 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1097                              struct usb_interface *usb_intf)
1098 {
1099         const struct firmware *fw, *bp;
1100         struct cxacru_data *instance = usbatm_instance->driver_data;
1101         int ret = cxacru_find_firmware(instance, "fw", &fw);
1102
1103         if (ret) {
1104                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1105                 return ret;
1106         }
1107
1108         if (instance->modem_type->boot_rom_patch) {
1109                 ret = cxacru_find_firmware(instance, "bp", &bp);
1110                 if (ret) {
1111                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1112                         release_firmware(fw);
1113                         return ret;
1114                 }
1115         }
1116
1117         cxacru_upload_firmware(instance, fw, bp);
1118
1119         if (instance->modem_type->boot_rom_patch)
1120                 release_firmware(bp);
1121         release_firmware(fw);
1122
1123         ret = cxacru_card_status(instance);
1124         if (ret)
1125                 usb_dbg(usbatm_instance, "modem initialisation failed\n");
1126         else
1127                 usb_dbg(usbatm_instance, "done setting up the modem\n");
1128
1129         return ret;
1130 }
1131
1132 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1133                        struct usb_interface *intf, const struct usb_device_id *id)
1134 {
1135         struct cxacru_data *instance;
1136         struct usb_device *usb_dev = interface_to_usbdev(intf);
1137         struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];
1138         int ret;
1139
1140         /* instance init */
1141         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1142         if (!instance)
1143                 return -ENOMEM;
1144
1145         instance->usbatm = usbatm_instance;
1146         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1147
1148         mutex_init(&instance->poll_state_serialize);
1149         instance->poll_state = CXPOLL_STOPPED;
1150         instance->line_status = -1;
1151         instance->adsl_status = -1;
1152
1153         mutex_init(&instance->adsl_state_serialize);
1154
1155         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1156         if (!instance->rcv_buf) {
1157                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for rcv_buf\n");
1158                 ret = -ENOMEM;
1159                 goto fail;
1160         }
1161         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1162         if (!instance->snd_buf) {
1163                 usb_dbg(usbatm_instance, "cxacru_bind: no memory for snd_buf\n");
1164                 ret = -ENOMEM;
1165                 goto fail;
1166         }
1167         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1168         if (!instance->rcv_urb) {
1169                 ret = -ENOMEM;
1170                 goto fail;
1171         }
1172         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1173         if (!instance->snd_urb) {
1174                 ret = -ENOMEM;
1175                 goto fail;
1176         }
1177
1178         if (!cmd_ep) {
1179                 usb_dbg(usbatm_instance, "cxacru_bind: no command endpoint\n");
1180                 ret = -ENODEV;
1181                 goto fail;
1182         }
1183
1184         if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1185                         == USB_ENDPOINT_XFER_INT) {
1186                 usb_fill_int_urb(instance->rcv_urb,
1187                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1188                         instance->rcv_buf, PAGE_SIZE,
1189                         cxacru_blocking_completion, &instance->rcv_done, 1);
1190
1191                 usb_fill_int_urb(instance->snd_urb,
1192                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1193                         instance->snd_buf, PAGE_SIZE,
1194                         cxacru_blocking_completion, &instance->snd_done, 4);
1195         } else {
1196                 usb_fill_bulk_urb(instance->rcv_urb,
1197                         usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD),
1198                         instance->rcv_buf, PAGE_SIZE,
1199                         cxacru_blocking_completion, &instance->rcv_done);
1200
1201                 usb_fill_bulk_urb(instance->snd_urb,
1202                         usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
1203                         instance->snd_buf, PAGE_SIZE,
1204                         cxacru_blocking_completion, &instance->snd_done);
1205         }
1206
1207         mutex_init(&instance->cm_serialize);
1208
1209         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1210
1211         usbatm_instance->driver_data = instance;
1212
1213         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1214
1215         return 0;
1216
1217  fail:
1218         free_page((unsigned long) instance->snd_buf);
1219         free_page((unsigned long) instance->rcv_buf);
1220         usb_free_urb(instance->snd_urb);
1221         usb_free_urb(instance->rcv_urb);
1222         kfree(instance);
1223
1224         return ret;
1225 }
1226
1227 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1228                 struct usb_interface *intf)
1229 {
1230         struct cxacru_data *instance = usbatm_instance->driver_data;
1231         int is_polling = 1;
1232
1233         usb_dbg(usbatm_instance, "cxacru_unbind entered\n");
1234
1235         if (!instance) {
1236                 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n");
1237                 return;
1238         }
1239
1240         mutex_lock(&instance->poll_state_serialize);
1241         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1242
1243         /* ensure that status polling continues unless
1244          * it has already stopped */
1245         if (instance->poll_state == CXPOLL_STOPPED)
1246                 is_polling = 0;
1247
1248         /* stop polling from being stopped or started */
1249         instance->poll_state = CXPOLL_SHUTDOWN;
1250         mutex_unlock(&instance->poll_state_serialize);
1251
1252         if (is_polling)
1253                 cancel_delayed_work_sync(&instance->poll_work);
1254
1255         usb_kill_urb(instance->snd_urb);
1256         usb_kill_urb(instance->rcv_urb);
1257         usb_free_urb(instance->snd_urb);
1258         usb_free_urb(instance->rcv_urb);
1259
1260         free_page((unsigned long) instance->snd_buf);
1261         free_page((unsigned long) instance->rcv_buf);
1262
1263         kfree(instance);
1264
1265         usbatm_instance->driver_data = NULL;
1266 }
1267
1268 static const struct cxacru_modem_type cxacru_cafe = {
1269         .pll_f_clk = 0x02d874df,
1270         .pll_b_clk = 0x0196a51a,
1271         .boot_rom_patch = 1,
1272 };
1273
1274 static const struct cxacru_modem_type cxacru_cb00 = {
1275         .pll_f_clk = 0x5,
1276         .pll_b_clk = 0x3,
1277         .boot_rom_patch = 0,
1278 };
1279
1280 static const struct usb_device_id cxacru_usb_ids[] = {
1281         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1282                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1283         },
1284         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1285                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1286         },
1287         { /* V = Conexant                       P = ADSL modem                          */
1288                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1289         },
1290         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1291                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1292         },
1293         { /* V = Conexant                       P = ADSL modem                          */
1294                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1295         },
1296         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1297                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1298         },
1299         { /* V = Olitec                         P = ADSL modem version 2                */
1300                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1301         },
1302         { /* V = Olitec                         P = ADSL modem version 3                */
1303                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1304         },
1305         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1306                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1307         },
1308         { /* V = Zoom                           P = 5510                                */
1309                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1310         },
1311         { /* V = Draytek                        P = Vigor 318                           */
1312                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1313         },
1314         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1315                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1316         },
1317         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1318                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1319         },
1320         { /* V = Aethra                         P = Starmodem UM1020                    */
1321                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1322         },
1323         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1324                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1325         },
1326         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1327                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1328         },
1329         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1330                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1331         },
1332         {}
1333 };
1334
1335 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1336
1337 static struct usbatm_driver cxacru_driver = {
1338         .driver_name    = cxacru_driver_name,
1339         .bind           = cxacru_bind,
1340         .heavy_init     = cxacru_heavy_init,
1341         .unbind         = cxacru_unbind,
1342         .atm_start      = cxacru_atm_start,
1343         .atm_stop       = cxacru_remove_device_files,
1344         .bulk_in        = CXACRU_EP_DATA,
1345         .bulk_out       = CXACRU_EP_DATA,
1346         .rx_padding     = 3,
1347         .tx_padding     = 11,
1348 };
1349
1350 static int cxacru_usb_probe(struct usb_interface *intf,
1351                 const struct usb_device_id *id)
1352 {
1353         struct usb_device *usb_dev = interface_to_usbdev(intf);
1354         char buf[15];
1355
1356         /* Avoid ADSL routers (cx82310_eth).
1357          * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD".
1358          */
1359         if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
1360                         && usb_string(usb_dev, usb_dev->descriptor.iProduct,
1361                                 buf, sizeof(buf)) > 0) {
1362                 if (!strcmp(buf, "USB NET CARD")) {
1363                         dev_info(&intf->dev, "ignoring cx82310_eth device\n");
1364                         return -ENODEV;
1365                 }
1366         }
1367
1368         return usbatm_usb_probe(intf, id, &cxacru_driver);
1369 }
1370
1371 static struct usb_driver cxacru_usb_driver = {
1372         .name           = cxacru_driver_name,
1373         .probe          = cxacru_usb_probe,
1374         .disconnect     = usbatm_usb_disconnect,
1375         .id_table       = cxacru_usb_ids
1376 };
1377
1378 module_usb_driver(cxacru_usb_driver);
1379
1380 MODULE_AUTHOR(DRIVER_AUTHOR);
1381 MODULE_DESCRIPTION(DRIVER_DESC);
1382 MODULE_LICENSE("GPL");
1383 MODULE_VERSION(DRIVER_VERSION);