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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 /* fall through */
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 * Disconect 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);