1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Intel Wireless WiMAX Connection 2400m 4 * Linux driver model glue for USB device, reset & fw upload 5 * 6 * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com> 7 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> 8 * Yanir Lubetkin <yanirx.lubetkin@intel.com> 9 * 10 * See i2400m-usb.h for a general description of this driver. 11 * 12 * This file implements driver model glue, and hook ups for the 13 * generic driver to implement the bus-specific functions (device 14 * communication setup/tear down, firmware upload and resetting). 15 * 16 * ROADMAP 17 * 18 * i2400mu_probe() 19 * alloc_netdev()... 20 * i2400mu_netdev_setup() 21 * i2400mu_init() 22 * i2400m_netdev_setup() 23 * i2400m_setup()... 24 * 25 * i2400mu_disconnect 26 * i2400m_release() 27 * free_netdev() 28 * 29 * i2400mu_suspend() 30 * i2400m_cmd_enter_powersave() 31 * i2400mu_notification_release() 32 * 33 * i2400mu_resume() 34 * i2400mu_notification_setup() 35 * 36 * i2400mu_bus_dev_start() Called by i2400m_dev_start() [who is 37 * i2400mu_tx_setup() called by i2400m_setup()] 38 * i2400mu_rx_setup() 39 * i2400mu_notification_setup() 40 * 41 * i2400mu_bus_dev_stop() Called by i2400m_dev_stop() [who is 42 * i2400mu_notification_release() called by i2400m_release()] 43 * i2400mu_rx_release() 44 * i2400mu_tx_release() 45 * 46 * i2400mu_bus_reset() Called by i2400m_reset 47 * __i2400mu_reset() 48 * __i2400mu_send_barker() 49 * usb_reset_device() 50 */ 51#include "i2400m-usb.h" 52#include <linux/wimax/i2400m.h> 53#include <linux/debugfs.h> 54#include <linux/slab.h> 55#include <linux/module.h> 56 57 58#define D_SUBMODULE usb 59#include "usb-debug-levels.h" 60 61static char i2400mu_debug_params[128]; 62module_param_string(debug, i2400mu_debug_params, sizeof(i2400mu_debug_params), 63 0644); 64MODULE_PARM_DESC(debug, 65 "String of space-separated NAME:VALUE pairs, where NAMEs " 66 "are the different debug submodules and VALUE are the " 67 "initial debug value to set."); 68 69/* Our firmware file name */ 70static const char *i2400mu_bus_fw_names_5x50[] = { 71#define I2400MU_FW_FILE_NAME_v1_5 "i2400m-fw-usb-1.5.sbcf" 72 I2400MU_FW_FILE_NAME_v1_5, 73#define I2400MU_FW_FILE_NAME_v1_4 "i2400m-fw-usb-1.4.sbcf" 74 I2400MU_FW_FILE_NAME_v1_4, 75 NULL, 76}; 77 78 79static const char *i2400mu_bus_fw_names_6050[] = { 80#define I6050U_FW_FILE_NAME_v1_5 "i6050-fw-usb-1.5.sbcf" 81 I6050U_FW_FILE_NAME_v1_5, 82 NULL, 83}; 84 85 86static 87int i2400mu_bus_dev_start(struct i2400m *i2400m) 88{ 89 int result; 90 struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); 91 struct device *dev = &i2400mu->usb_iface->dev; 92 93 d_fnstart(3, dev, "(i2400m %p)\n", i2400m); 94 result = i2400mu_tx_setup(i2400mu); 95 if (result < 0) 96 goto error_usb_tx_setup; 97 result = i2400mu_rx_setup(i2400mu); 98 if (result < 0) 99 goto error_usb_rx_setup; 100 result = i2400mu_notification_setup(i2400mu); 101 if (result < 0) 102 goto error_notif_setup; 103 d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); 104 return result; 105 106error_notif_setup: 107 i2400mu_rx_release(i2400mu); 108error_usb_rx_setup: 109 i2400mu_tx_release(i2400mu); 110error_usb_tx_setup: 111 d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); 112 return result; 113} 114 115 116static 117void i2400mu_bus_dev_stop(struct i2400m *i2400m) 118{ 119 struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); 120 struct device *dev = &i2400mu->usb_iface->dev; 121 122 d_fnstart(3, dev, "(i2400m %p)\n", i2400m); 123 i2400mu_notification_release(i2400mu); 124 i2400mu_rx_release(i2400mu); 125 i2400mu_tx_release(i2400mu); 126 d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); 127} 128 129 130/* 131 * Sends a barker buffer to the device 132 * 133 * This helper will allocate a kmalloced buffer and use it to transmit 134 * (then free it). Reason for this is that other arches cannot use 135 * stack/vmalloc/text areas for DMA transfers. 136 * 137 * Error recovery here is simpler: anything is considered a hard error 138 * and will move the reset code to use a last-resort bus-based reset. 139 */ 140static 141int __i2400mu_send_barker(struct i2400mu *i2400mu, 142 const __le32 *barker, 143 size_t barker_size, 144 unsigned endpoint) 145{ 146 struct usb_endpoint_descriptor *epd = NULL; 147 int pipe, actual_len, ret; 148 struct device *dev = &i2400mu->usb_iface->dev; 149 void *buffer; 150 int do_autopm = 1; 151 152 ret = usb_autopm_get_interface(i2400mu->usb_iface); 153 if (ret < 0) { 154 dev_err(dev, "RESET: can't get autopm: %d\n", ret); 155 do_autopm = 0; 156 } 157 ret = -ENOMEM; 158 buffer = kmalloc(barker_size, GFP_KERNEL); 159 if (buffer == NULL) 160 goto error_kzalloc; 161 epd = usb_get_epd(i2400mu->usb_iface, endpoint); 162 pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress); 163 memcpy(buffer, barker, barker_size); 164retry: 165 ret = usb_bulk_msg(i2400mu->usb_dev, pipe, buffer, barker_size, 166 &actual_len, 200); 167 switch (ret) { 168 case 0: 169 if (actual_len != barker_size) { /* Too short? drop it */ 170 dev_err(dev, "E: %s: short write (%d B vs %zu " 171 "expected)\n", 172 __func__, actual_len, barker_size); 173 ret = -EIO; 174 } 175 break; 176 case -EPIPE: 177 /* 178 * Stall -- maybe the device is choking with our 179 * requests. Clear it and give it some time. If they 180 * happen to often, it might be another symptom, so we 181 * reset. 182 * 183 * No error handling for usb_clear_halt(0; if it 184 * works, the retry works; if it fails, this switch 185 * does the error handling for us. 186 */ 187 if (edc_inc(&i2400mu->urb_edc, 188 10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { 189 dev_err(dev, "E: %s: too many stalls in " 190 "URB; resetting device\n", __func__); 191 usb_queue_reset_device(i2400mu->usb_iface); 192 /* fallthrough */ 193 } else { 194 usb_clear_halt(i2400mu->usb_dev, pipe); 195 msleep(10); /* give the device some time */ 196 goto retry; 197 } 198 fallthrough; 199 case -EINVAL: /* while removing driver */ 200 case -ENODEV: /* dev disconnect ... */ 201 case -ENOENT: /* just ignore it */ 202 case -ESHUTDOWN: /* and exit */ 203 case -ECONNRESET: 204 ret = -ESHUTDOWN; 205 break; 206 default: /* Some error? */ 207 if (edc_inc(&i2400mu->urb_edc, 208 EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { 209 dev_err(dev, "E: %s: maximum errors in URB " 210 "exceeded; resetting device\n", 211 __func__); 212 usb_queue_reset_device(i2400mu->usb_iface); 213 } else { 214 dev_warn(dev, "W: %s: cannot send URB: %d\n", 215 __func__, ret); 216 goto retry; 217 } 218 } 219 kfree(buffer); 220error_kzalloc: 221 if (do_autopm) 222 usb_autopm_put_interface(i2400mu->usb_iface); 223 return ret; 224} 225 226 227/* 228 * Reset a device at different levels (warm, cold or bus) 229 * 230 * @i2400m: device descriptor 231 * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS) 232 * 233 * Warm and cold resets get a USB reset if they fail. 234 * 235 * Warm reset: 236 * 237 * The device will be fully reset internally, but won't be 238 * disconnected from the USB bus (so no reenumeration will 239 * happen). Firmware upload will be necessary. 240 * 241 * The device will send a reboot barker in the notification endpoint 242 * that will trigger the driver to reinitialize the state 243 * automatically from notif.c:i2400m_notification_grok() into 244 * i2400m_dev_bootstrap_delayed(). 245 * 246 * Cold and bus (USB) reset: 247 * 248 * The device will be fully reset internally, disconnected from the 249 * USB bus an a reenumeration will happen. Firmware upload will be 250 * necessary. Thus, we don't do any locking or struct 251 * reinitialization, as we are going to be fully disconnected and 252 * reenumerated. 253 * 254 * Note we need to return -ENODEV if a warm reset was requested and we 255 * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset() 256 * and wimax_dev->op_reset. 257 * 258 * WARNING: no driver state saved/fixed 259 */ 260static 261int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt) 262{ 263 int result; 264 struct i2400mu *i2400mu = 265 container_of(i2400m, struct i2400mu, i2400m); 266 struct device *dev = i2400m_dev(i2400m); 267 static const __le32 i2400m_WARM_BOOT_BARKER[4] = { 268 cpu_to_le32(I2400M_WARM_RESET_BARKER), 269 cpu_to_le32(I2400M_WARM_RESET_BARKER), 270 cpu_to_le32(I2400M_WARM_RESET_BARKER), 271 cpu_to_le32(I2400M_WARM_RESET_BARKER), 272 }; 273 static const __le32 i2400m_COLD_BOOT_BARKER[4] = { 274 cpu_to_le32(I2400M_COLD_RESET_BARKER), 275 cpu_to_le32(I2400M_COLD_RESET_BARKER), 276 cpu_to_le32(I2400M_COLD_RESET_BARKER), 277 cpu_to_le32(I2400M_COLD_RESET_BARKER), 278 }; 279 280 d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt); 281 if (rt == I2400M_RT_WARM) 282 result = __i2400mu_send_barker( 283 i2400mu, i2400m_WARM_BOOT_BARKER, 284 sizeof(i2400m_WARM_BOOT_BARKER), 285 i2400mu->endpoint_cfg.bulk_out); 286 else if (rt == I2400M_RT_COLD) 287 result = __i2400mu_send_barker( 288 i2400mu, i2400m_COLD_BOOT_BARKER, 289 sizeof(i2400m_COLD_BOOT_BARKER), 290 i2400mu->endpoint_cfg.reset_cold); 291 else if (rt == I2400M_RT_BUS) { 292 result = usb_reset_device(i2400mu->usb_dev); 293 switch (result) { 294 case 0: 295 case -EINVAL: /* device is gone */ 296 case -ENODEV: 297 case -ENOENT: 298 case -ESHUTDOWN: 299 result = 0; 300 break; /* We assume the device is disconnected */ 301 default: 302 dev_err(dev, "USB reset failed (%d), giving up!\n", 303 result); 304 } 305 } else { 306 result = -EINVAL; /* shut gcc up in certain arches */ 307 BUG(); 308 } 309 if (result < 0 310 && result != -EINVAL /* device is gone */ 311 && rt != I2400M_RT_BUS) { 312 /* 313 * Things failed -- resort to lower level reset, that 314 * we queue in another context; the reason for this is 315 * that the pre and post reset functionality requires 316 * the i2400m->init_mutex; RT_WARM and RT_COLD can 317 * come from areas where i2400m->init_mutex is taken. 318 */ 319 dev_err(dev, "%s reset failed (%d); trying USB reset\n", 320 rt == I2400M_RT_WARM ? "warm" : "cold", result); 321 usb_queue_reset_device(i2400mu->usb_iface); 322 result = -ENODEV; 323 } 324 d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result); 325 return result; 326} 327 328static void i2400mu_get_drvinfo(struct net_device *net_dev, 329 struct ethtool_drvinfo *info) 330{ 331 struct i2400m *i2400m = net_dev_to_i2400m(net_dev); 332 struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); 333 struct usb_device *udev = i2400mu->usb_dev; 334 335 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 336 strlcpy(info->fw_version, i2400m->fw_name ? : "", 337 sizeof(info->fw_version)); 338 usb_make_path(udev, info->bus_info, sizeof(info->bus_info)); 339} 340 341static const struct ethtool_ops i2400mu_ethtool_ops = { 342 .get_drvinfo = i2400mu_get_drvinfo, 343 .get_link = ethtool_op_get_link, 344}; 345 346static 347void i2400mu_netdev_setup(struct net_device *net_dev) 348{ 349 struct i2400m *i2400m = net_dev_to_i2400m(net_dev); 350 struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m); 351 i2400mu_init(i2400mu); 352 i2400m_netdev_setup(net_dev); 353 net_dev->ethtool_ops = &i2400mu_ethtool_ops; 354} 355 356 357/* 358 * Debug levels control; see debug.h 359 */ 360struct d_level D_LEVEL[] = { 361 D_SUBMODULE_DEFINE(usb), 362 D_SUBMODULE_DEFINE(fw), 363 D_SUBMODULE_DEFINE(notif), 364 D_SUBMODULE_DEFINE(rx), 365 D_SUBMODULE_DEFINE(tx), 366}; 367size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL); 368 369static 370void i2400mu_debugfs_add(struct i2400mu *i2400mu) 371{ 372 struct dentry *dentry = i2400mu->i2400m.wimax_dev.debugfs_dentry; 373 374 dentry = debugfs_create_dir("i2400m-usb", dentry); 375 i2400mu->debugfs_dentry = dentry; 376 377 d_level_register_debugfs("dl_", usb, dentry); 378 d_level_register_debugfs("dl_", fw, dentry); 379 d_level_register_debugfs("dl_", notif, dentry); 380 d_level_register_debugfs("dl_", rx, dentry); 381 d_level_register_debugfs("dl_", tx, dentry); 382 383 /* Don't touch these if you don't know what you are doing */ 384 debugfs_create_u8("rx_size_auto_shrink", 0600, dentry, 385 &i2400mu->rx_size_auto_shrink); 386 387 debugfs_create_size_t("rx_size", 0600, dentry, &i2400mu->rx_size); 388} 389 390 391static struct device_type i2400mu_type = { 392 .name = "wimax", 393}; 394 395/* 396 * Probe a i2400m interface and register it 397 * 398 * @iface: USB interface to link to 399 * @id: USB class/subclass/protocol id 400 * @returns: 0 if ok, < 0 errno code on error. 401 * 402 * Alloc a net device, initialize the bus-specific details and then 403 * calls the bus-generic initialization routine. That will register 404 * the wimax and netdev devices, upload the firmware [using 405 * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the 406 * communication with the device and then will start to talk to it to 407 * finnish setting it up. 408 */ 409static 410int i2400mu_probe(struct usb_interface *iface, 411 const struct usb_device_id *id) 412{ 413 int result; 414 struct net_device *net_dev; 415 struct device *dev = &iface->dev; 416 struct i2400m *i2400m; 417 struct i2400mu *i2400mu; 418 struct usb_device *usb_dev = interface_to_usbdev(iface); 419 420 if (iface->cur_altsetting->desc.bNumEndpoints < 4) 421 return -ENODEV; 422 423 if (usb_dev->speed != USB_SPEED_HIGH) 424 dev_err(dev, "device not connected as high speed\n"); 425 426 /* Allocate instance [calls i2400m_netdev_setup() on it]. */ 427 result = -ENOMEM; 428 net_dev = alloc_netdev(sizeof(*i2400mu), "wmx%d", NET_NAME_UNKNOWN, 429 i2400mu_netdev_setup); 430 if (net_dev == NULL) { 431 dev_err(dev, "no memory for network device instance\n"); 432 goto error_alloc_netdev; 433 } 434 SET_NETDEV_DEV(net_dev, dev); 435 SET_NETDEV_DEVTYPE(net_dev, &i2400mu_type); 436 i2400m = net_dev_to_i2400m(net_dev); 437 i2400mu = container_of(i2400m, struct i2400mu, i2400m); 438 i2400m->wimax_dev.net_dev = net_dev; 439 i2400mu->usb_dev = usb_get_dev(usb_dev); 440 i2400mu->usb_iface = iface; 441 usb_set_intfdata(iface, i2400mu); 442 443 i2400m->bus_tx_block_size = I2400MU_BLK_SIZE; 444 /* 445 * Room required in the Tx queue for USB message to accommodate 446 * a smallest payload while allocating header space is 16 bytes. 447 * Adding this room for the new tx message increases the 448 * possibilities of including any payload with size <= 16 bytes. 449 */ 450 i2400m->bus_tx_room_min = I2400MU_BLK_SIZE; 451 i2400m->bus_pl_size_max = I2400MU_PL_SIZE_MAX; 452 i2400m->bus_setup = NULL; 453 i2400m->bus_dev_start = i2400mu_bus_dev_start; 454 i2400m->bus_dev_stop = i2400mu_bus_dev_stop; 455 i2400m->bus_release = NULL; 456 i2400m->bus_tx_kick = i2400mu_bus_tx_kick; 457 i2400m->bus_reset = i2400mu_bus_reset; 458 i2400m->bus_bm_retries = I2400M_USB_BOOT_RETRIES; 459 i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send; 460 i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack; 461 i2400m->bus_bm_mac_addr_impaired = 0; 462 463 switch (id->idProduct) { 464 case USB_DEVICE_ID_I6050: 465 case USB_DEVICE_ID_I6050_2: 466 case USB_DEVICE_ID_I6150: 467 case USB_DEVICE_ID_I6150_2: 468 case USB_DEVICE_ID_I6150_3: 469 case USB_DEVICE_ID_I6250: 470 i2400mu->i6050 = 1; 471 break; 472 default: 473 break; 474 } 475 476 if (i2400mu->i6050) { 477 i2400m->bus_fw_names = i2400mu_bus_fw_names_6050; 478 i2400mu->endpoint_cfg.bulk_out = 0; 479 i2400mu->endpoint_cfg.notification = 3; 480 i2400mu->endpoint_cfg.reset_cold = 2; 481 i2400mu->endpoint_cfg.bulk_in = 1; 482 } else { 483 i2400m->bus_fw_names = i2400mu_bus_fw_names_5x50; 484 i2400mu->endpoint_cfg.bulk_out = 0; 485 i2400mu->endpoint_cfg.notification = 1; 486 i2400mu->endpoint_cfg.reset_cold = 2; 487 i2400mu->endpoint_cfg.bulk_in = 3; 488 } 489#ifdef CONFIG_PM 490 iface->needs_remote_wakeup = 1; /* autosuspend (15s delay) */ 491 device_init_wakeup(dev, 1); 492 pm_runtime_set_autosuspend_delay(&usb_dev->dev, 15000); 493 usb_enable_autosuspend(usb_dev); 494#endif 495 496 result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT); 497 if (result < 0) { 498 dev_err(dev, "cannot setup device: %d\n", result); 499 goto error_setup; 500 } 501 i2400mu_debugfs_add(i2400mu); 502 return 0; 503 504error_setup: 505 usb_set_intfdata(iface, NULL); 506 usb_put_dev(i2400mu->usb_dev); 507 free_netdev(net_dev); 508error_alloc_netdev: 509 return result; 510} 511 512 513/* 514 * Disconnect a i2400m from the system. 515 * 516 * i2400m_stop() has been called before, so al the rx and tx contexts 517 * have been taken down already. Make sure the queue is stopped, 518 * unregister netdev and i2400m, free and kill. 519 */ 520static 521void i2400mu_disconnect(struct usb_interface *iface) 522{ 523 struct i2400mu *i2400mu = usb_get_intfdata(iface); 524 struct i2400m *i2400m = &i2400mu->i2400m; 525 struct net_device *net_dev = i2400m->wimax_dev.net_dev; 526 struct device *dev = &iface->dev; 527 528 d_fnstart(3, dev, "(iface %p i2400m %p)\n", iface, i2400m); 529 530 debugfs_remove_recursive(i2400mu->debugfs_dentry); 531 i2400m_release(i2400m); 532 usb_set_intfdata(iface, NULL); 533 usb_put_dev(i2400mu->usb_dev); 534 free_netdev(net_dev); 535 d_fnend(3, dev, "(iface %p i2400m %p) = void\n", iface, i2400m); 536} 537 538 539/* 540 * Get the device ready for USB port or system standby and hibernation 541 * 542 * USB port and system standby are handled the same. 543 * 544 * When the system hibernates, the USB device is powered down and then 545 * up, so we don't really have to do much here, as it will be seen as 546 * a reconnect. Still for simplicity we consider this case the same as 547 * suspend, so that the device has a chance to do notify the base 548 * station (if connected). 549 * 550 * So at the end, the three cases require common handling. 551 * 552 * If at the time of this call the device's firmware is not loaded, 553 * nothing has to be done. Note we can be "loose" about not reading 554 * i2400m->updown under i2400m->init_mutex. If it happens to change 555 * inmediately, other parts of the call flow will fail and effectively 556 * catch it. 557 * 558 * If the firmware is loaded, we need to: 559 * 560 * - tell the device to go into host interface power save mode, wait 561 * for it to ack 562 * 563 * This is quite more interesting than it is; we need to execute a 564 * command, but this time, we don't want the code in usb-{tx,rx}.c 565 * to call the usb_autopm_get/put_interface() barriers as it'd 566 * deadlock, so we need to decrement i2400mu->do_autopm, that acts 567 * as a poor man's semaphore. Ugly, but it works. 568 * 569 * As well, the device might refuse going to sleep for whichever 570 * reason. In this case we just fail. For system suspend/hibernate, 571 * we *can't* fail. We check PMSG_IS_AUTO to see if the 572 * suspend call comes from the USB stack or from the system and act 573 * in consequence. 574 * 575 * - stop the notification endpoint polling 576 */ 577static 578int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg) 579{ 580 int result = 0; 581 struct device *dev = &iface->dev; 582 struct i2400mu *i2400mu = usb_get_intfdata(iface); 583 unsigned is_autosuspend = 0; 584 struct i2400m *i2400m = &i2400mu->i2400m; 585 586#ifdef CONFIG_PM 587 if (PMSG_IS_AUTO(pm_msg)) 588 is_autosuspend = 1; 589#endif 590 591 d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event); 592 rmb(); /* see i2400m->updown's documentation */ 593 if (i2400m->updown == 0) 594 goto no_firmware; 595 if (i2400m->state == I2400M_SS_DATA_PATH_CONNECTED && is_autosuspend) { 596 /* ugh -- the device is connected and this suspend 597 * request is an autosuspend one (not a system standby 598 * / hibernate). 599 * 600 * The only way the device can go to standby is if the 601 * link with the base station is in IDLE mode; that 602 * were the case, we'd be in status 603 * I2400M_SS_CONNECTED_IDLE. But we are not. 604 * 605 * If we *tell* him to go power save now, it'll reset 606 * as a precautionary measure, so if this is an 607 * autosuspend thing, say no and it'll come back 608 * later, when the link is IDLE 609 */ 610 result = -EBADF; 611 d_printf(1, dev, "fw up, link up, not-idle, autosuspend: " 612 "not entering powersave\n"); 613 goto error_not_now; 614 } 615 d_printf(1, dev, "fw up: entering powersave\n"); 616 atomic_dec(&i2400mu->do_autopm); 617 result = i2400m_cmd_enter_powersave(i2400m); 618 atomic_inc(&i2400mu->do_autopm); 619 if (result < 0 && !is_autosuspend) { 620 /* System suspend, can't fail */ 621 dev_err(dev, "failed to suspend, will reset on resume\n"); 622 result = 0; 623 } 624 if (result < 0) 625 goto error_enter_powersave; 626 i2400mu_notification_release(i2400mu); 627 d_printf(1, dev, "powersave requested\n"); 628error_enter_powersave: 629error_not_now: 630no_firmware: 631 d_fnend(3, dev, "(iface %p pm_msg %u) = %d\n", 632 iface, pm_msg.event, result); 633 return result; 634} 635 636 637static 638int i2400mu_resume(struct usb_interface *iface) 639{ 640 int ret = 0; 641 struct device *dev = &iface->dev; 642 struct i2400mu *i2400mu = usb_get_intfdata(iface); 643 struct i2400m *i2400m = &i2400mu->i2400m; 644 645 d_fnstart(3, dev, "(iface %p)\n", iface); 646 rmb(); /* see i2400m->updown's documentation */ 647 if (i2400m->updown == 0) { 648 d_printf(1, dev, "fw was down, no resume needed\n"); 649 goto out; 650 } 651 d_printf(1, dev, "fw was up, resuming\n"); 652 i2400mu_notification_setup(i2400mu); 653 /* USB has flow control, so we don't need to give it time to 654 * come back; otherwise, we'd use something like a get-state 655 * command... */ 656out: 657 d_fnend(3, dev, "(iface %p) = %d\n", iface, ret); 658 return ret; 659} 660 661 662static 663int i2400mu_reset_resume(struct usb_interface *iface) 664{ 665 int result; 666 struct device *dev = &iface->dev; 667 struct i2400mu *i2400mu = usb_get_intfdata(iface); 668 struct i2400m *i2400m = &i2400mu->i2400m; 669 670 d_fnstart(3, dev, "(iface %p)\n", iface); 671 result = i2400m_dev_reset_handle(i2400m, "device reset on resume"); 672 d_fnend(3, dev, "(iface %p) = %d\n", iface, result); 673 return result < 0 ? result : 0; 674} 675 676 677/* 678 * Another driver or user space is triggering a reset on the device 679 * which contains the interface passed as an argument. Cease IO and 680 * save any device state you need to restore. 681 * 682 * If you need to allocate memory here, use GFP_NOIO or GFP_ATOMIC, if 683 * you are in atomic context. 684 */ 685static 686int i2400mu_pre_reset(struct usb_interface *iface) 687{ 688 struct i2400mu *i2400mu = usb_get_intfdata(iface); 689 return i2400m_pre_reset(&i2400mu->i2400m); 690} 691 692 693/* 694 * The reset has completed. Restore any saved device state and begin 695 * using the device again. 696 * 697 * If you need to allocate memory here, use GFP_NOIO or GFP_ATOMIC, if 698 * you are in atomic context. 699 */ 700static 701int i2400mu_post_reset(struct usb_interface *iface) 702{ 703 struct i2400mu *i2400mu = usb_get_intfdata(iface); 704 return i2400m_post_reset(&i2400mu->i2400m); 705} 706 707 708static 709struct usb_device_id i2400mu_id_table[] = { 710 { USB_DEVICE(0x8086, USB_DEVICE_ID_I6050) }, 711 { USB_DEVICE(0x8086, USB_DEVICE_ID_I6050_2) }, 712 { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150) }, 713 { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150_2) }, 714 { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150_3) }, 715 { USB_DEVICE(0x8086, USB_DEVICE_ID_I6250) }, 716 { USB_DEVICE(0x8086, 0x0181) }, 717 { USB_DEVICE(0x8086, 0x1403) }, 718 { USB_DEVICE(0x8086, 0x1405) }, 719 { USB_DEVICE(0x8086, 0x0180) }, 720 { USB_DEVICE(0x8086, 0x0182) }, 721 { USB_DEVICE(0x8086, 0x1406) }, 722 { USB_DEVICE(0x8086, 0x1403) }, 723 { }, 724}; 725MODULE_DEVICE_TABLE(usb, i2400mu_id_table); 726 727 728static 729struct usb_driver i2400mu_driver = { 730 .name = KBUILD_MODNAME, 731 .suspend = i2400mu_suspend, 732 .resume = i2400mu_resume, 733 .reset_resume = i2400mu_reset_resume, 734 .probe = i2400mu_probe, 735 .disconnect = i2400mu_disconnect, 736 .pre_reset = i2400mu_pre_reset, 737 .post_reset = i2400mu_post_reset, 738 .id_table = i2400mu_id_table, 739 .supports_autosuspend = 1, 740}; 741 742static 743int __init i2400mu_driver_init(void) 744{ 745 d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400mu_debug_params, 746 "i2400m_usb.debug"); 747 return usb_register(&i2400mu_driver); 748} 749module_init(i2400mu_driver_init); 750 751 752static 753void __exit i2400mu_driver_exit(void) 754{ 755 usb_deregister(&i2400mu_driver); 756} 757module_exit(i2400mu_driver_exit); 758 759MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>"); 760MODULE_DESCRIPTION("Driver for USB based Intel Wireless WiMAX Connection 2400M " 761 "(5x50 & 6050)"); 762MODULE_LICENSE("GPL"); 763MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_5); 764MODULE_FIRMWARE(I6050U_FW_FILE_NAME_v1_5); 765