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 cxacru_sysfs_showattr_u32(u32 value,char * buf)231 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf) 232 { 233 return sprintf(buf, "%u\n", value); 234 } 235 cxacru_sysfs_showattr_s8(s8 value,char * buf)236 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf) 237 { 238 return sprintf(buf, "%d\n", value); 239 } 240 cxacru_sysfs_showattr_dB(s16 value,char * buf)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 cxacru_sysfs_showattr_bool(u32 value,char * buf)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 cxacru_sysfs_showattr_LINK(u32 value,char * buf)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 cxacru_sysfs_showattr_LINE(u32 value,char * buf)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 cxacru_sysfs_showattr_MODU(u32 value,char * buf)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 */ mac_address_show(struct device * dev,struct device_attribute * attr,char * buf)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 adsl_state_show(struct device * dev,struct device_attribute * attr,char * buf)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 adsl_state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 adsl_config_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 */ cxacru_blocking_completion(struct urb * urb)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 cxacru_timeout_kill(struct timer_list * t)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 cxacru_start_wait_urb(struct urb * urb,struct completion * done,int * actual_length)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 cxacru_cm(struct cxacru_data * instance,enum cxacru_cm_request cm,u8 * wdata,int wsize,u8 * rdata,int rsize)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 cxacru_cm_get_array(struct cxacru_data * instance,enum cxacru_cm_request cm,u32 * data,int size)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 cxacru_card_status(struct cxacru_data * instance)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 cxacru_atm_start(struct usbatm_data * usbatm_instance,struct atm_dev * atm_dev)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 cxacru_poll_status(struct work_struct * work)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 cxacru_fw(struct usb_device * usb_dev,enum cxacru_fw_request fw,u8 code1,u8 code2,u32 addr,const u8 * data,int size)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 cxacru_upload_firmware(struct cxacru_data * instance,const struct firmware * fw,const struct firmware * bp)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 cxacru_find_firmware(struct cxacru_data * instance,char * phase,const struct firmware ** fw_p)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, "cxacru-%s.bin", phase); 1080 usb_dbg(usbatm, "cxacru_find_firmware: looking for %s\n", buf); 1081 1082 if (request_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 cxacru_heavy_init(struct usbatm_data * usbatm_instance,struct usb_interface * usb_intf)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 (cxacru-fw.bin) 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 (cxacru-bp.bin) 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 cxacru_bind(struct usbatm_data * usbatm_instance,struct usb_interface * intf,const struct usb_device_id * id)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 static const u8 ep_addrs[] = { 1135 CXACRU_EP_CMD + USB_DIR_IN, 1136 CXACRU_EP_CMD + USB_DIR_OUT, 1137 0}; 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 (usb_endpoint_xfer_int(&cmd_ep->desc)) 1185 ret = usb_check_int_endpoints(intf, ep_addrs); 1186 else 1187 ret = usb_check_bulk_endpoints(intf, ep_addrs); 1188 1189 if (!ret) { 1190 usb_err(usbatm_instance, "cxacru_bind: interface has incorrect endpoints\n"); 1191 ret = -ENODEV; 1192 goto fail; 1193 } 1194 1195 if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 1196 == USB_ENDPOINT_XFER_INT) { 1197 usb_fill_int_urb(instance->rcv_urb, 1198 usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD), 1199 instance->rcv_buf, PAGE_SIZE, 1200 cxacru_blocking_completion, &instance->rcv_done, 1); 1201 1202 usb_fill_int_urb(instance->snd_urb, 1203 usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD), 1204 instance->snd_buf, PAGE_SIZE, 1205 cxacru_blocking_completion, &instance->snd_done, 4); 1206 } else { 1207 usb_fill_bulk_urb(instance->rcv_urb, 1208 usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD), 1209 instance->rcv_buf, PAGE_SIZE, 1210 cxacru_blocking_completion, &instance->rcv_done); 1211 1212 usb_fill_bulk_urb(instance->snd_urb, 1213 usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD), 1214 instance->snd_buf, PAGE_SIZE, 1215 cxacru_blocking_completion, &instance->snd_done); 1216 } 1217 1218 mutex_init(&instance->cm_serialize); 1219 1220 INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status); 1221 1222 usbatm_instance->driver_data = instance; 1223 1224 usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT); 1225 1226 return 0; 1227 1228 fail: 1229 free_page((unsigned long) instance->snd_buf); 1230 free_page((unsigned long) instance->rcv_buf); 1231 usb_free_urb(instance->snd_urb); 1232 usb_free_urb(instance->rcv_urb); 1233 kfree(instance); 1234 1235 return ret; 1236 } 1237 cxacru_unbind(struct usbatm_data * usbatm_instance,struct usb_interface * intf)1238 static void cxacru_unbind(struct usbatm_data *usbatm_instance, 1239 struct usb_interface *intf) 1240 { 1241 struct cxacru_data *instance = usbatm_instance->driver_data; 1242 int is_polling = 1; 1243 1244 usb_dbg(usbatm_instance, "cxacru_unbind entered\n"); 1245 1246 if (!instance) { 1247 usb_dbg(usbatm_instance, "cxacru_unbind: NULL instance!\n"); 1248 return; 1249 } 1250 1251 mutex_lock(&instance->poll_state_serialize); 1252 BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN); 1253 1254 /* ensure that status polling continues unless 1255 * it has already stopped */ 1256 if (instance->poll_state == CXPOLL_STOPPED) 1257 is_polling = 0; 1258 1259 /* stop polling from being stopped or started */ 1260 instance->poll_state = CXPOLL_SHUTDOWN; 1261 mutex_unlock(&instance->poll_state_serialize); 1262 1263 if (is_polling) 1264 cancel_delayed_work_sync(&instance->poll_work); 1265 1266 usb_kill_urb(instance->snd_urb); 1267 usb_kill_urb(instance->rcv_urb); 1268 usb_free_urb(instance->snd_urb); 1269 usb_free_urb(instance->rcv_urb); 1270 1271 free_page((unsigned long) instance->snd_buf); 1272 free_page((unsigned long) instance->rcv_buf); 1273 1274 kfree(instance); 1275 1276 usbatm_instance->driver_data = NULL; 1277 } 1278 1279 static const struct cxacru_modem_type cxacru_cafe = { 1280 .pll_f_clk = 0x02d874df, 1281 .pll_b_clk = 0x0196a51a, 1282 .boot_rom_patch = 1, 1283 }; 1284 1285 static const struct cxacru_modem_type cxacru_cb00 = { 1286 .pll_f_clk = 0x5, 1287 .pll_b_clk = 0x3, 1288 .boot_rom_patch = 0, 1289 }; 1290 1291 static const struct usb_device_id cxacru_usb_ids[] = { 1292 { /* V = Conexant P = ADSL modem (Euphrates project) */ 1293 USB_DEVICE(0x0572, 0xcafe), .driver_info = (unsigned long) &cxacru_cafe 1294 }, 1295 { /* V = Conexant P = ADSL modem (Hasbani project) */ 1296 USB_DEVICE(0x0572, 0xcb00), .driver_info = (unsigned long) &cxacru_cb00 1297 }, 1298 { /* V = Conexant P = ADSL modem */ 1299 USB_DEVICE(0x0572, 0xcb01), .driver_info = (unsigned long) &cxacru_cb00 1300 }, 1301 { /* V = Conexant P = ADSL modem (Well PTI-800) */ 1302 USB_DEVICE(0x0572, 0xcb02), .driver_info = (unsigned long) &cxacru_cb00 1303 }, 1304 { /* V = Conexant P = ADSL modem */ 1305 USB_DEVICE(0x0572, 0xcb06), .driver_info = (unsigned long) &cxacru_cb00 1306 }, 1307 { /* V = Conexant P = ADSL modem (ZTE ZXDSL 852) */ 1308 USB_DEVICE(0x0572, 0xcb07), .driver_info = (unsigned long) &cxacru_cb00 1309 }, 1310 { /* V = Olitec P = ADSL modem version 2 */ 1311 USB_DEVICE(0x08e3, 0x0100), .driver_info = (unsigned long) &cxacru_cafe 1312 }, 1313 { /* V = Olitec P = ADSL modem version 3 */ 1314 USB_DEVICE(0x08e3, 0x0102), .driver_info = (unsigned long) &cxacru_cb00 1315 }, 1316 { /* V = Trust/Amigo Technology Co. P = AMX-CA86U */ 1317 USB_DEVICE(0x0eb0, 0x3457), .driver_info = (unsigned long) &cxacru_cafe 1318 }, 1319 { /* V = Zoom P = 5510 */ 1320 USB_DEVICE(0x1803, 0x5510), .driver_info = (unsigned long) &cxacru_cb00 1321 }, 1322 { /* V = Draytek P = Vigor 318 */ 1323 USB_DEVICE(0x0675, 0x0200), .driver_info = (unsigned long) &cxacru_cb00 1324 }, 1325 { /* V = Zyxel P = 630-C1 aka OMNI ADSL USB (Annex A) */ 1326 USB_DEVICE(0x0586, 0x330a), .driver_info = (unsigned long) &cxacru_cb00 1327 }, 1328 { /* V = Zyxel P = 630-C3 aka OMNI ADSL USB (Annex B) */ 1329 USB_DEVICE(0x0586, 0x330b), .driver_info = (unsigned long) &cxacru_cb00 1330 }, 1331 { /* V = Aethra P = Starmodem UM1020 */ 1332 USB_DEVICE(0x0659, 0x0020), .driver_info = (unsigned long) &cxacru_cb00 1333 }, 1334 { /* V = Aztech Systems P = ? AKA Pirelli AUA-010 */ 1335 USB_DEVICE(0x0509, 0x0812), .driver_info = (unsigned long) &cxacru_cb00 1336 }, 1337 { /* V = Netopia P = Cayman 3341(Annex A)/3351(Annex B) */ 1338 USB_DEVICE(0x100d, 0xcb01), .driver_info = (unsigned long) &cxacru_cb00 1339 }, 1340 { /* V = Netopia P = Cayman 3342(Annex A)/3352(Annex B) */ 1341 USB_DEVICE(0x100d, 0x3342), .driver_info = (unsigned long) &cxacru_cb00 1342 }, 1343 {} 1344 }; 1345 1346 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids); 1347 1348 static struct usbatm_driver cxacru_driver = { 1349 .driver_name = cxacru_driver_name, 1350 .bind = cxacru_bind, 1351 .heavy_init = cxacru_heavy_init, 1352 .unbind = cxacru_unbind, 1353 .atm_start = cxacru_atm_start, 1354 .bulk_in = CXACRU_EP_DATA, 1355 .bulk_out = CXACRU_EP_DATA, 1356 .rx_padding = 3, 1357 .tx_padding = 11, 1358 }; 1359 cxacru_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)1360 static int cxacru_usb_probe(struct usb_interface *intf, 1361 const struct usb_device_id *id) 1362 { 1363 struct usb_device *usb_dev = interface_to_usbdev(intf); 1364 char buf[15]; 1365 1366 /* Avoid ADSL routers (cx82310_eth). 1367 * Abort if bDeviceClass is 0xff and iProduct is "USB NET CARD". 1368 */ 1369 if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC 1370 && usb_string(usb_dev, usb_dev->descriptor.iProduct, 1371 buf, sizeof(buf)) > 0) { 1372 if (!strcmp(buf, "USB NET CARD")) { 1373 dev_info(&intf->dev, "ignoring cx82310_eth device\n"); 1374 return -ENODEV; 1375 } 1376 } 1377 1378 return usbatm_usb_probe(intf, id, &cxacru_driver); 1379 } 1380 1381 static struct usb_driver cxacru_usb_driver = { 1382 .name = cxacru_driver_name, 1383 .probe = cxacru_usb_probe, 1384 .disconnect = usbatm_usb_disconnect, 1385 .id_table = cxacru_usb_ids, 1386 .dev_groups = cxacru_groups, 1387 }; 1388 1389 module_usb_driver(cxacru_usb_driver); 1390 1391 MODULE_AUTHOR(DRIVER_AUTHOR); 1392 MODULE_DESCRIPTION(DRIVER_DESC); 1393 MODULE_LICENSE("GPL"); 1394