projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
zd1211rw: reset device when CR_BCN_FIFO_SEMAPHORE freezes in beacon setup
[deliverable/linux.git] / drivers / net / wireless / zd1211rw / zd_usb.c
CommitLineData
66bb42fd
DD		 1/* ZD1211 USB-WLAN driver for Linux
2 *
3 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
4 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
5 * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
e85d0918
DD		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
d066c219 22#include <linux/kernel.h>
e85d0918 23#include <linux/init.h>
e85d0918
DD		 24#include <linux/firmware.h>
25#include <linux/device.h>
26#include <linux/errno.h>
5a0e3ad6 27#include <linux/slab.h>
e85d0918
DD		 28#include <linux/skbuff.h>
29#include <linux/usb.h>
bc5f06a8 30#include <linux/workqueue.h>
459c51ad 31#include <net/mac80211.h>
c248725b 32#include <asm/unaligned.h>
e85d0918
DD		 33
34#include "zd_def.h"
e85d0918
DD		 35#include "zd_mac.h"
36#include "zd_usb.h"
e85d0918
DD		 37
38static struct usb_device_id usb_ids[] = {
39 /* ZD1211 */
3bfbe80e
HTL		 40 { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
43 { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 },
44 { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
45 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
46 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
e85d0918 47 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
14990c69 48 { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 49 { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
50 { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
51 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
e85d0918 52 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
aa1d3a18 53 { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 54 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
55 { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 },
56 { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
f2423723 57 { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
8cecc90e 58 { USB_DEVICE(0x14ea, 0xab10), .driver_info = DEVICE_ZD1211 },
229782a3 59 { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
269fca0e 60 { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 61 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
62 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
63 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
64 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
e85d0918 65 /* ZD1211B */
3bfbe80e 66 { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
ad580db5 67 { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 68 { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
69 { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
70 { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
71 { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
8b339d05 72 { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 73 { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
74 { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
75 { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
76 { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
77 { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
dd2f5538 78 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 79 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B },
80 { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B },
81 { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
8f75e07a 82 { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B },
f72151fb 83 { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B },
9dfd5500 84 { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 85 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
86 { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B },
aec91028 87 { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
c445a31c 88 { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
8e97afe5 89 { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
de262496 90 { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 91 { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
92 { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
93 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
94 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
95 { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
8cecc90e 96 { USB_DEVICE(0x2019, 0xed01), .driver_info = DEVICE_ZD1211B },
a1030e92
DD		 97 /* "Driverless" devices that need ejecting */
98 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
aa1d3a18 99 { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER },
e85d0918
DD		 100 {}
101};
102
103MODULE_LICENSE("GPL");
104MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
105MODULE_AUTHOR("Ulrich Kunitz");
106MODULE_AUTHOR("Daniel Drake");
107MODULE_VERSION("1.0");
108MODULE_DEVICE_TABLE(usb, usb_ids);
109
110#define FW_ZD1211_PREFIX "zd1211/zd1211_"
111#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
112
e85d0918 113/* USB device initialization */
72e77a8a 114static void int_urb_complete(struct urb *urb);
e85d0918
DD		 115
116static int request_fw_file(
117 const struct firmware **fw, const char *name, struct device *device)
118{
119 int r;
120
121 dev_dbg_f(device, "fw name %s\n", name);
122
123 r = request_firmware(fw, name, device);
124 if (r)
125 dev_err(device,
126 "Could not load firmware file %s. Error number %d\n",
127 name, r);
128 return r;
129}
130
131static inline u16 get_bcdDevice(const struct usb_device *udev)
132{
133 return le16_to_cpu(udev->descriptor.bcdDevice);
134}
135
136enum upload_code_flags {
137 REBOOT = 1,
138};
139
140/* Ensures that MAX_TRANSFER_SIZE is even. */
141#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
142
143static int upload_code(struct usb_device *udev,
144 const u8 *data, size_t size, u16 code_offset, int flags)
145{
146 u8 *p;
147 int r;
148
149 /* USB request blocks need "kmalloced" buffers.
150 */
151 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
152 if (!p) {
153 dev_err(&udev->dev, "out of memory\n");
154 r = -ENOMEM;
155 goto error;
156 }
157
158 size &= ~1;
159 while (size > 0) {
160 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
161 size : MAX_TRANSFER_SIZE;
162
163 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
164
165 memcpy(p, data, transfer_size);
166 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
167 USB_REQ_FIRMWARE_DOWNLOAD,
168 USB_DIR_OUT | USB_TYPE_VENDOR,
169 code_offset, 0, p, transfer_size, 1000 /* ms */);
170 if (r < 0) {
171 dev_err(&udev->dev,
172 "USB control request for firmware upload"
173 " failed. Error number %d\n", r);
174 goto error;
175 }
176 transfer_size = r & ~1;
177
178 size -= transfer_size;
179 data += transfer_size;
180 code_offset += transfer_size/sizeof(u16);
181 }
182
183 if (flags & REBOOT) {
184 u8 ret;
185
a8c4ea7a 186 /* Use "DMA-aware" buffer. */
e85d0918
DD		 187 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
188 USB_REQ_FIRMWARE_CONFIRM,
189 USB_DIR_IN | USB_TYPE_VENDOR,
a8c4ea7a 190 0, 0, p, sizeof(ret), 5000 /* ms */);
e85d0918
DD		 191 if (r != sizeof(ret)) {
192 dev_err(&udev->dev,
193 "control request firmeware confirmation failed."
194 " Return value %d\n", r);
195 if (r >= 0)
196 r = -ENODEV;
197 goto error;
198 }
a8c4ea7a 199 ret = p[0];
e85d0918
DD		 200 if (ret & 0x80) {
201 dev_err(&udev->dev,
202 "Internal error while downloading."
203 " Firmware confirm return value %#04x\n",
204 (unsigned int)ret);
205 r = -ENODEV;
206 goto error;
207 }
208 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
209 (unsigned int)ret);
210 }
211
212 r = 0;
213error:
214 kfree(p);
215 return r;
216}
217
218static u16 get_word(const void *data, u16 offset)
219{
220 const __le16 *p = data;
221 return le16_to_cpu(p[offset]);
222}
223
74553aed 224static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size,
e85d0918
DD		 225 const char* postfix)
226{
227 scnprintf(buffer, size, "%s%s",
74553aed 228 usb->is_zd1211b ?
e85d0918
DD		 229 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
230 postfix);
231 return buffer;
232}
233
74553aed 234static int handle_version_mismatch(struct zd_usb *usb,
d066c219
DD		 235 const struct firmware *ub_fw)
236{
74553aed 237 struct usb_device *udev = zd_usb_to_usbdev(usb);
d066c219
DD		 238 const struct firmware *ur_fw = NULL;
239 int offset;
240 int r = 0;
241 char fw_name[128];
242
243 r = request_fw_file(&ur_fw,
74553aed 244 get_fw_name(usb, fw_name, sizeof(fw_name), "ur"),
d066c219
DD		 245 &udev->dev);
246 if (r)
247 goto error;
248
ee302767 249 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
d066c219
DD		 250 if (r)
251 goto error;
252
ee302767 253 offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
d066c219 254 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
ee302767 255 E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
d066c219
DD		 256
257 /* At this point, the vendor driver downloads the whole firmware
258 * image, hacks around with version IDs, and uploads it again,
259 * completely overwriting the boot code. We do not do this here as
260 * it is not required on any tested devices, and it is suspected to
261 * cause problems. */
262error:
263 release_firmware(ur_fw);
264 return r;
265}
266
74553aed 267static int upload_firmware(struct zd_usb *usb)
e85d0918
DD		 268{
269 int r;
270 u16 fw_bcdDevice;
271 u16 bcdDevice;
74553aed 272 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918
DD		 273 const struct firmware *ub_fw = NULL;
274 const struct firmware *uph_fw = NULL;
275 char fw_name[128];
276
277 bcdDevice = get_bcdDevice(udev);
278
279 r = request_fw_file(&ub_fw,
74553aed 280 get_fw_name(usb, fw_name, sizeof(fw_name), "ub"),
e85d0918
DD		 281 &udev->dev);
282 if (r)
283 goto error;
284
ee302767 285 fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
e85d0918 286
e85d0918
DD		 287 if (fw_bcdDevice != bcdDevice) {
288 dev_info(&udev->dev,
d066c219
DD		 289 "firmware version %#06x and device bootcode version "
290 "%#06x differ\n", fw_bcdDevice, bcdDevice);
291 if (bcdDevice <= 0x4313)
292 dev_warn(&udev->dev, "device has old bootcode, please "
293 "report success or failure\n");
294
74553aed 295 r = handle_version_mismatch(usb, ub_fw);
d066c219
DD		 296 if (r)
297 goto error;
e85d0918
DD		 298 } else {
299 dev_dbg_f(&udev->dev,
300 "firmware device id %#06x is equal to the "
301 "actual device id\n", fw_bcdDevice);
302 }
303
304
305 r = request_fw_file(&uph_fw,
74553aed 306 get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"),
e85d0918
DD		 307 &udev->dev);
308 if (r)
309 goto error;
310
ee302767 311 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
e85d0918
DD		 312 if (r) {
313 dev_err(&udev->dev,
314 "Could not upload firmware code uph. Error number %d\n",
315 r);
316 }
317
318 /* FALL-THROUGH */
319error:
320 release_firmware(ub_fw);
321 release_firmware(uph_fw);
322 return r;
323}
324
3e8b4d00
BH		 325MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur");
326MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur");
327MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub");
328MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub");
329MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr");
330MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr");
331
74553aed
DD		 332/* Read data from device address space using "firmware interface" which does
333 * not require firmware to be loaded. */
334int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
335{
336 int r;
337 struct usb_device *udev = zd_usb_to_usbdev(usb);
a8c4ea7a 338 u8 *buf;
74553aed 339
a8c4ea7a
AN		 340 /* Use "DMA-aware" buffer. */
341 buf = kmalloc(len, GFP_KERNEL);
342 if (!buf)
343 return -ENOMEM;
74553aed
DD		 344 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
345 USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
a8c4ea7a 346 buf, len, 5000);
74553aed
DD		 347 if (r < 0) {
348 dev_err(&udev->dev,
349 "read over firmware interface failed: %d\n", r);
a8c4ea7a 350 goto exit;
74553aed
DD		 351 } else if (r != len) {
352 dev_err(&udev->dev,
353 "incomplete read over firmware interface: %d/%d\n",
354 r, len);
a8c4ea7a
AN		 355 r = -EIO;
356 goto exit;
74553aed 357 }
a8c4ea7a
AN		 358 r = 0;
359 memcpy(data, buf, len);
360exit:
361 kfree(buf);
362 return r;
74553aed
DD		 363}
364
e85d0918
DD		 365#define urb_dev(urb) (&(urb)->dev->dev)
366
367static inline void handle_regs_int(struct urb *urb)
368{
369 struct zd_usb *usb = urb->context;
370 struct zd_usb_interrupt *intr = &usb->intr;
371 int len;
72e77a8a 372 u16 int_num;
e85d0918
DD		 373
374 ZD_ASSERT(in_interrupt());
375 spin_lock(&intr->lock);
376
d63ddcec 377 int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
72e77a8a
LCC		 378 if (int_num == CR_INTERRUPT) {
379 struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
8b17f75c 380 spin_lock(&mac->lock);
72e77a8a
LCC		 381 memcpy(&mac->intr_buffer, urb->transfer_buffer,
382 USB_MAX_EP_INT_BUFFER);
8b17f75c 383 spin_unlock(&mac->lock);
72e77a8a
LCC		 384 schedule_work(&mac->process_intr);
385 } else if (intr->read_regs_enabled) {
e85d0918
DD		 386 intr->read_regs.length = len = urb->actual_length;
387
388 if (len > sizeof(intr->read_regs.buffer))
389 len = sizeof(intr->read_regs.buffer);
390 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
391 intr->read_regs_enabled = 0;
392 complete(&intr->read_regs.completion);
393 goto out;
394 }
395
e85d0918
DD		 396out:
397 spin_unlock(&intr->lock);
398}
399
7d12e780 400static void int_urb_complete(struct urb *urb)
e85d0918
DD		 401{
402 int r;
403 struct usb_int_header *hdr;
404
405 switch (urb->status) {
406 case 0:
407 break;
408 case -ESHUTDOWN:
409 case -EINVAL:
410 case -ENODEV:
411 case -ENOENT:
412 case -ECONNRESET:
e85d0918 413 case -EPIPE:
4a3b0874 414 return;
e85d0918
DD		 415 default:
416 goto resubmit;
417 }
418
419 if (urb->actual_length < sizeof(hdr)) {
420 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
421 goto resubmit;
422 }
423
424 hdr = urb->transfer_buffer;
425 if (hdr->type != USB_INT_TYPE) {
426 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
427 goto resubmit;
428 }
429
430 switch (hdr->id) {
431 case USB_INT_ID_REGS:
432 handle_regs_int(urb);
433 break;
434 case USB_INT_ID_RETRY_FAILED:
7f4013f0 435 zd_mac_tx_failed(urb);
e85d0918
DD		 436 break;
437 default:
438 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
439 (unsigned int)hdr->id);
440 goto resubmit;
441 }
442
443resubmit:
444 r = usb_submit_urb(urb, GFP_ATOMIC);
445 if (r) {
4a3b0874
JK		 446 dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n",
447 urb, r);
448 /* TODO: add worker to reset intr->urb */
e85d0918
DD		 449 }
450 return;
e85d0918
DD		 451}
452
453static inline int int_urb_interval(struct usb_device *udev)
454{
455 switch (udev->speed) {
456 case USB_SPEED_HIGH:
457 return 4;
458 case USB_SPEED_LOW:
459 return 10;
460 case USB_SPEED_FULL:
461 default:
462 return 1;
463 }
464}
465
466static inline int usb_int_enabled(struct zd_usb *usb)
467{
468 unsigned long flags;
469 struct zd_usb_interrupt *intr = &usb->intr;
470 struct urb *urb;
471
472 spin_lock_irqsave(&intr->lock, flags);
473 urb = intr->urb;
474 spin_unlock_irqrestore(&intr->lock, flags);
475 return urb != NULL;
476}
477
478int zd_usb_enable_int(struct zd_usb *usb)
479{
480 int r;
4a3b0874 481 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918 482 struct zd_usb_interrupt *intr = &usb->intr;
e85d0918
DD		 483 struct urb *urb;
484
485 dev_dbg_f(zd_usb_dev(usb), "\n");
486
35c3404e 487 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 488 if (!urb) {
489 r = -ENOMEM;
490 goto out;
491 }
492
493 ZD_ASSERT(!irqs_disabled());
494 spin_lock_irq(&intr->lock);
495 if (intr->urb) {
496 spin_unlock_irq(&intr->lock);
497 r = 0;
498 goto error_free_urb;
499 }
500 intr->urb = urb;
501 spin_unlock_irq(&intr->lock);
502
e85d0918 503 r = -ENOMEM;
4a3b0874
JK		 504 intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
505 GFP_KERNEL, &intr->buffer_dma);
506 if (!intr->buffer) {
e85d0918
DD		 507 dev_dbg_f(zd_usb_dev(usb),
508 "couldn't allocate transfer_buffer\n");
509 goto error_set_urb_null;
510 }
511
e85d0918 512 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
4a3b0874 513 intr->buffer, USB_MAX_EP_INT_BUFFER,
e85d0918
DD		 514 int_urb_complete, usb,
515 intr->interval);
4a3b0874
JK		 516 urb->transfer_dma = intr->buffer_dma;
517 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
e85d0918
DD		 518
519 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
35c3404e 520 r = usb_submit_urb(urb, GFP_KERNEL);
e85d0918
DD		 521 if (r) {
522 dev_dbg_f(zd_usb_dev(usb),
523 "Couldn't submit urb. Error number %d\n", r);
524 goto error;
525 }
526
527 return 0;
528error:
4a3b0874
JK		 529 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
530 intr->buffer, intr->buffer_dma);
e85d0918
DD		 531error_set_urb_null:
532 spin_lock_irq(&intr->lock);
533 intr->urb = NULL;
534 spin_unlock_irq(&intr->lock);
535error_free_urb:
536 usb_free_urb(urb);
537out:
538 return r;
539}
540
541void zd_usb_disable_int(struct zd_usb *usb)
542{
543 unsigned long flags;
4a3b0874 544 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918
DD		 545 struct zd_usb_interrupt *intr = &usb->intr;
546 struct urb *urb;
4a3b0874
JK		 547 void *buffer;
548 dma_addr_t buffer_dma;
e85d0918
DD		 549
550 spin_lock_irqsave(&intr->lock, flags);
551 urb = intr->urb;
552 if (!urb) {
553 spin_unlock_irqrestore(&intr->lock, flags);
554 return;
555 }
556 intr->urb = NULL;
4a3b0874
JK		 557 buffer = intr->buffer;
558 buffer_dma = intr->buffer_dma;
559 intr->buffer = NULL;
e85d0918
DD		 560 spin_unlock_irqrestore(&intr->lock, flags);
561
562 usb_kill_urb(urb);
563 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
564 usb_free_urb(urb);
4a3b0874
JK		 565
566 if (buffer)
567 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
568 buffer, buffer_dma);
e85d0918
DD		 569}
570
571static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
572 unsigned int length)
573{
574 int i;
e85d0918
DD		 575 const struct rx_length_info *length_info;
576
577 if (length < sizeof(struct rx_length_info)) {
578 /* It's not a complete packet anyhow. */
7f4013f0
BP		 579 printk("%s: invalid, small RX packet : %d\n",
580 __func__, length);
e85d0918
DD		 581 return;
582 }
583 length_info = (struct rx_length_info *)
584 (buffer + length - sizeof(struct rx_length_info));
585
586 /* It might be that three frames are merged into a single URB
587 * transaction. We have to check for the length info tag.
588 *
589 * While testing we discovered that length_info might be unaligned,
590 * because if USB transactions are merged, the last packet will not
591 * be padded. Unaligned access might also happen if the length_info
592 * structure is not present.
593 */
533dd1b0 594 if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
b269825b 595 {
e85d0918
DD		 596 unsigned int l, k, n;
597 for (i = 0, l = 0;; i++) {
533dd1b0 598 k = get_unaligned_le16(&length_info->length[i]);
850c211c
UK		 599 if (k == 0)
600 return;
e85d0918
DD		 601 n = l+k;
602 if (n > length)
603 return;
459c51ad 604 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
e85d0918
DD		 605 if (i >= 2)
606 return;
607 l = (n+3) & ~3;
608 }
609 } else {
459c51ad 610 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
e85d0918
DD		 611 }
612}
613
7d12e780 614static void rx_urb_complete(struct urb *urb)
e85d0918
DD		 615{
616 struct zd_usb *usb;
617 struct zd_usb_rx *rx;
618 const u8 *buffer;
619 unsigned int length;
620
621 switch (urb->status) {
622 case 0:
623 break;
624 case -ESHUTDOWN:
625 case -EINVAL:
626 case -ENODEV:
627 case -ENOENT:
628 case -ECONNRESET:
e85d0918 629 case -EPIPE:
b312d799 630 return;
e85d0918
DD		 631 default:
632 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
633 goto resubmit;
634 }
635
636 buffer = urb->transfer_buffer;
637 length = urb->actual_length;
638 usb = urb->context;
639 rx = &usb->rx;
640
641 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
642 /* If there is an old first fragment, we don't care. */
643 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
644 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
645 spin_lock(&rx->lock);
646 memcpy(rx->fragment, buffer, length);
647 rx->fragment_length = length;
648 spin_unlock(&rx->lock);
649 goto resubmit;
650 }
651
652 spin_lock(&rx->lock);
653 if (rx->fragment_length > 0) {
654 /* We are on a second fragment, we believe */
655 ZD_ASSERT(length + rx->fragment_length <=
656 ARRAY_SIZE(rx->fragment));
657 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
658 memcpy(rx->fragment+rx->fragment_length, buffer, length);
659 handle_rx_packet(usb, rx->fragment,
660 rx->fragment_length + length);
661 rx->fragment_length = 0;
662 spin_unlock(&rx->lock);
663 } else {
664 spin_unlock(&rx->lock);
665 handle_rx_packet(usb, buffer, length);
666 }
667
668resubmit:
669 usb_submit_urb(urb, GFP_ATOMIC);
670}
671
459c51ad 672static struct urb *alloc_rx_urb(struct zd_usb *usb)
e85d0918
DD		 673{
674 struct usb_device *udev = zd_usb_to_usbdev(usb);
675 struct urb *urb;
676 void *buffer;
677
35c3404e 678 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 679 if (!urb)
680 return NULL;
997ea58e
DM		 681 buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
682 &urb->transfer_dma);
e85d0918
DD		 683 if (!buffer) {
684 usb_free_urb(urb);
685 return NULL;
686 }
687
688 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
997ea58e 689 buffer, USB_MAX_RX_SIZE,
e85d0918
DD		 690 rx_urb_complete, usb);
691 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
692
693 return urb;
694}
695
459c51ad 696static void free_rx_urb(struct urb *urb)
e85d0918
DD		 697{
698 if (!urb)
699 return;
997ea58e
DM		 700 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
701 urb->transfer_buffer, urb->transfer_dma);
e85d0918
DD		 702 usb_free_urb(urb);
703}
704
705int zd_usb_enable_rx(struct zd_usb *usb)
706{
707 int i, r;
708 struct zd_usb_rx *rx = &usb->rx;
709 struct urb **urbs;
710
711 dev_dbg_f(zd_usb_dev(usb), "\n");
712
713 r = -ENOMEM;
459c51ad 714 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
e85d0918
DD		 715 if (!urbs)
716 goto error;
459c51ad
DD		 717 for (i = 0; i < RX_URBS_COUNT; i++) {
718 urbs[i] = alloc_rx_urb(usb);
e85d0918
DD		 719 if (!urbs[i])
720 goto error;
721 }
722
723 ZD_ASSERT(!irqs_disabled());
724 spin_lock_irq(&rx->lock);
725 if (rx->urbs) {
726 spin_unlock_irq(&rx->lock);
727 r = 0;
728 goto error;
729 }
730 rx->urbs = urbs;
459c51ad 731 rx->urbs_count = RX_URBS_COUNT;
e85d0918
DD		 732 spin_unlock_irq(&rx->lock);
733
459c51ad 734 for (i = 0; i < RX_URBS_COUNT; i++) {
35c3404e 735 r = usb_submit_urb(urbs[i], GFP_KERNEL);
e85d0918
DD		 736 if (r)
737 goto error_submit;
738 }
739
740 return 0;
741error_submit:
459c51ad 742 for (i = 0; i < RX_URBS_COUNT; i++) {
e85d0918
DD		 743 usb_kill_urb(urbs[i]);
744 }
745 spin_lock_irq(&rx->lock);
746 rx->urbs = NULL;
747 rx->urbs_count = 0;
748 spin_unlock_irq(&rx->lock);
749error:
750 if (urbs) {
459c51ad
DD		 751 for (i = 0; i < RX_URBS_COUNT; i++)
752 free_rx_urb(urbs[i]);
e85d0918
DD		 753 }
754 return r;
755}
756
757void zd_usb_disable_rx(struct zd_usb *usb)
758{
759 int i;
760 unsigned long flags;
761 struct urb **urbs;
762 unsigned int count;
763 struct zd_usb_rx *rx = &usb->rx;
764
765 spin_lock_irqsave(&rx->lock, flags);
766 urbs = rx->urbs;
767 count = rx->urbs_count;
768 spin_unlock_irqrestore(&rx->lock, flags);
769 if (!urbs)
770 return;
771
772 for (i = 0; i < count; i++) {
773 usb_kill_urb(urbs[i]);
459c51ad 774 free_rx_urb(urbs[i]);
e85d0918
DD		 775 }
776 kfree(urbs);
777
778 spin_lock_irqsave(&rx->lock, flags);
779 rx->urbs = NULL;
780 rx->urbs_count = 0;
781 spin_unlock_irqrestore(&rx->lock, flags);
782}
783
459c51ad
DD		 784/**
785 * zd_usb_disable_tx - disable transmission
786 * @usb: the zd1211rw-private USB structure
787 *
788 * Frees all URBs in the free list and marks the transmission as disabled.
789 */
790void zd_usb_disable_tx(struct zd_usb *usb)
791{
792 struct zd_usb_tx *tx = &usb->tx;
793 unsigned long flags;
78fc800f
JK		 794
795 atomic_set(&tx->enabled, 0);
796
797 /* kill all submitted tx-urbs */
798 usb_kill_anchored_urbs(&tx->submitted);
459c51ad
DD		 799
800 spin_lock_irqsave(&tx->lock, flags);
a0fd751f 801 WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
78fc800f 802 WARN_ON(tx->submitted_urbs != 0);
459c51ad 803 tx->submitted_urbs = 0;
78fc800f
JK		 804 spin_unlock_irqrestore(&tx->lock, flags);
805
459c51ad
DD		 806 /* The stopped state is ignored, relying on ieee80211_wake_queues()
807 * in a potentionally following zd_usb_enable_tx().
808 */
459c51ad
DD		 809}
810
811/**
812 * zd_usb_enable_tx - enables transmission
813 * @usb: a &struct zd_usb pointer
814 *
815 * This function enables transmission and prepares the &zd_usb_tx data
816 * structure.
817 */
818void zd_usb_enable_tx(struct zd_usb *usb)
819{
820 unsigned long flags;
821 struct zd_usb_tx *tx = &usb->tx;
822
823 spin_lock_irqsave(&tx->lock, flags);
78fc800f 824 atomic_set(&tx->enabled, 1);
459c51ad
DD		 825 tx->submitted_urbs = 0;
826 ieee80211_wake_queues(zd_usb_to_hw(usb));
827 tx->stopped = 0;
828 spin_unlock_irqrestore(&tx->lock, flags);
829}
830
459c51ad
DD		 831static void tx_dec_submitted_urbs(struct zd_usb *usb)
832{
833 struct zd_usb_tx *tx = &usb->tx;
834 unsigned long flags;
835
836 spin_lock_irqsave(&tx->lock, flags);
837 --tx->submitted_urbs;
838 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
839 ieee80211_wake_queues(zd_usb_to_hw(usb));
840 tx->stopped = 0;
841 }
842 spin_unlock_irqrestore(&tx->lock, flags);
843}
844
845static void tx_inc_submitted_urbs(struct zd_usb *usb)
846{
847 struct zd_usb_tx *tx = &usb->tx;
848 unsigned long flags;
849
850 spin_lock_irqsave(&tx->lock, flags);
851 ++tx->submitted_urbs;
852 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
853 ieee80211_stop_queues(zd_usb_to_hw(usb));
854 tx->stopped = 1;
855 }
856 spin_unlock_irqrestore(&tx->lock, flags);
857}
858
859/**
860 * tx_urb_complete - completes the execution of an URB
861 * @urb: a URB
862 *
863 * This function is called if the URB has been transferred to a device or an
864 * error has happened.
865 */
7d12e780 866static void tx_urb_complete(struct urb *urb)
e85d0918
DD		 867{
868 int r;
459c51ad 869 struct sk_buff *skb;
e039fa4a 870 struct ieee80211_tx_info *info;
459c51ad 871 struct zd_usb *usb;
78fc800f
JK		 872 struct zd_usb_tx *tx;
873
874 skb = (struct sk_buff *)urb->context;
875 info = IEEE80211_SKB_CB(skb);
876 /*
877 * grab 'usb' pointer before handing off the skb (since
878 * it might be freed by zd_mac_tx_to_dev or mac80211)
879 */
880 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
881 tx = &usb->tx;
e85d0918
DD		 882
883 switch (urb->status) {
884 case 0:
885 break;
886 case -ESHUTDOWN:
887 case -EINVAL:
888 case -ENODEV:
889 case -ENOENT:
890 case -ECONNRESET:
b312d799 891 case -EPIPE:
e85d0918
DD		 892 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
893 break;
e85d0918
DD		 894 default:
895 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
896 goto resubmit;
897 }
898free_urb:
a0fd751f 899 skb_unlink(skb, &usb->tx.submitted_skbs);
dbabad0c 900 zd_mac_tx_to_dev(skb, urb->status);
78fc800f 901 usb_free_urb(urb);
459c51ad 902 tx_dec_submitted_urbs(usb);
e85d0918
DD		 903 return;
904resubmit:
78fc800f 905 usb_anchor_urb(urb, &tx->submitted);
e85d0918
DD		 906 r = usb_submit_urb(urb, GFP_ATOMIC);
907 if (r) {
78fc800f 908 usb_unanchor_urb(urb);
e85d0918
DD		 909 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
910 goto free_urb;
911 }
912}
913
459c51ad
DD		 914/**
915 * zd_usb_tx: initiates transfer of a frame of the device
916 *
917 * @usb: the zd1211rw-private USB structure
918 * @skb: a &struct sk_buff pointer
919 *
920 * This function tranmits a frame to the device. It doesn't wait for
921 * completion. The frame must contain the control set and have all the
922 * control set information available.
923 *
924 * The function returns 0 if the transfer has been successfully initiated.
e85d0918 925 */
459c51ad 926int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
e85d0918
DD		 927{
928 int r;
a0fd751f 929 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e85d0918
DD		 930 struct usb_device *udev = zd_usb_to_usbdev(usb);
931 struct urb *urb;
78fc800f 932 struct zd_usb_tx *tx = &usb->tx;
e85d0918 933
78fc800f
JK		 934 if (!atomic_read(&tx->enabled)) {
935 r = -ENOENT;
936 goto out;
937 }
938
939 urb = usb_alloc_urb(0, GFP_ATOMIC);
e85d0918
DD		 940 if (!urb) {
941 r = -ENOMEM;
942 goto out;
943 }
944
e85d0918 945 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
459c51ad 946 skb->data, skb->len, tx_urb_complete, skb);
e85d0918 947
a0fd751f
JK		 948 info->rate_driver_data[1] = (void *)jiffies;
949 skb_queue_tail(&tx->submitted_skbs, skb);
78fc800f 950 usb_anchor_urb(urb, &tx->submitted);
a0fd751f 951
e85d0918 952 r = usb_submit_urb(urb, GFP_ATOMIC);
78fc800f
JK		 953 if (r) {
954 usb_unanchor_urb(urb);
a0fd751f 955 skb_unlink(skb, &tx->submitted_skbs);
e85d0918 956 goto error;
78fc800f 957 }
459c51ad 958 tx_inc_submitted_urbs(usb);
e85d0918
DD		 959 return 0;
960error:
78fc800f 961 usb_free_urb(urb);
e85d0918
DD		 962out:
963 return r;
964}
965
a0fd751f
JK		 966static bool zd_tx_timeout(struct zd_usb *usb)
967{
968 struct zd_usb_tx *tx = &usb->tx;
969 struct sk_buff_head *q = &tx->submitted_skbs;
970 struct sk_buff *skb, *skbnext;
971 struct ieee80211_tx_info *info;
972 unsigned long flags, trans_start;
973 bool have_timedout = false;
974
975 spin_lock_irqsave(&q->lock, flags);
976 skb_queue_walk_safe(q, skb, skbnext) {
977 info = IEEE80211_SKB_CB(skb);
978 trans_start = (unsigned long)info->rate_driver_data[1];
979
980 if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
981 have_timedout = true;
982 break;
983 }
984 }
985 spin_unlock_irqrestore(&q->lock, flags);
986
987 return have_timedout;
988}
989
990static void zd_tx_watchdog_handler(struct work_struct *work)
991{
992 struct zd_usb *usb =
993 container_of(work, struct zd_usb, tx.watchdog_work.work);
994 struct zd_usb_tx *tx = &usb->tx;
995
996 if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
997 goto out;
998 if (!zd_tx_timeout(usb))
999 goto out;
1000
1001 /* TX halted, try reset */
1002 dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device...");
1003
1004 usb_queue_reset_device(usb->intf);
1005
1006 /* reset will stop this worker, don't rearm */
1007 return;
1008out:
1009 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1010 ZD_TX_WATCHDOG_INTERVAL);
1011}
1012
1013void zd_tx_watchdog_enable(struct zd_usb *usb)
1014{
1015 struct zd_usb_tx *tx = &usb->tx;
1016
1017 if (!tx->watchdog_enabled) {
1018 dev_dbg_f(zd_usb_dev(usb), "\n");
1019 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1020 ZD_TX_WATCHDOG_INTERVAL);
1021 tx->watchdog_enabled = 1;
1022 }
1023}
1024
1025void zd_tx_watchdog_disable(struct zd_usb *usb)
1026{
1027 struct zd_usb_tx *tx = &usb->tx;
1028
1029 if (tx->watchdog_enabled) {
1030 dev_dbg_f(zd_usb_dev(usb), "\n");
1031 tx->watchdog_enabled = 0;
1032 cancel_delayed_work_sync(&tx->watchdog_work);
1033 }
1034}
1035
e85d0918
DD		 1036static inline void init_usb_interrupt(struct zd_usb *usb)
1037{
1038 struct zd_usb_interrupt *intr = &usb->intr;
1039
1040 spin_lock_init(&intr->lock);
1041 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
1042 init_completion(&intr->read_regs.completion);
0ce34bc8 1043 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
e85d0918
DD		 1044}
1045
1046static inline void init_usb_rx(struct zd_usb *usb)
1047{
1048 struct zd_usb_rx *rx = &usb->rx;
1049 spin_lock_init(&rx->lock);
1050 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
1051 rx->usb_packet_size = 512;
1052 } else {
1053 rx->usb_packet_size = 64;
1054 }
1055 ZD_ASSERT(rx->fragment_length == 0);
1056}
1057
1058static inline void init_usb_tx(struct zd_usb *usb)
1059{
459c51ad
DD		 1060 struct zd_usb_tx *tx = &usb->tx;
1061 spin_lock_init(&tx->lock);
78fc800f 1062 atomic_set(&tx->enabled, 0);
459c51ad 1063 tx->stopped = 0;
a0fd751f 1064 skb_queue_head_init(&tx->submitted_skbs);
78fc800f 1065 init_usb_anchor(&tx->submitted);
459c51ad 1066 tx->submitted_urbs = 0;
a0fd751f
JK		 1067 tx->watchdog_enabled = 0;
1068 INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
e85d0918
DD		 1069}
1070
459c51ad 1071void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
e85d0918
DD		 1072 struct usb_interface *intf)
1073{
1074 memset(usb, 0, sizeof(*usb));
1075 usb->intf = usb_get_intf(intf);
459c51ad 1076 usb_set_intfdata(usb->intf, hw);
e85d0918
DD		 1077 init_usb_interrupt(usb);
1078 init_usb_tx(usb);
1079 init_usb_rx(usb);
1080}
1081
e85d0918
DD		 1082void zd_usb_clear(struct zd_usb *usb)
1083{
1084 usb_set_intfdata(usb->intf, NULL);
1085 usb_put_intf(usb->intf);
c48cf125 1086 ZD_MEMCLEAR(usb, sizeof(*usb));
e85d0918
DD		 1087 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1088}
1089
1090static const char *speed(enum usb_device_speed speed)
1091{
1092 switch (speed) {
1093 case USB_SPEED_LOW:
1094 return "low";
1095 case USB_SPEED_FULL:
1096 return "full";
1097 case USB_SPEED_HIGH:
1098 return "high";
1099 default:
1100 return "unknown speed";
1101 }
1102}
1103
1104static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1105{
1106 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1107 le16_to_cpu(udev->descriptor.idVendor),
1108 le16_to_cpu(udev->descriptor.idProduct),
1109 get_bcdDevice(udev),
1110 speed(udev->speed));
1111}
1112
1113int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1114{
1115 struct usb_device *udev = interface_to_usbdev(usb->intf);
1116 return scnprint_id(udev, buffer, size);
1117}
1118
1119#ifdef DEBUG
1120static void print_id(struct usb_device *udev)
1121{
1122 char buffer[40];
1123
1124 scnprint_id(udev, buffer, sizeof(buffer));
1125 buffer[sizeof(buffer)-1] = 0;
1126 dev_dbg_f(&udev->dev, "%s\n", buffer);
1127}
1128#else
1129#define print_id(udev) do { } while (0)
1130#endif
1131
a1030e92
DD		 1132static int eject_installer(struct usb_interface *intf)
1133{
1134 struct usb_device *udev = interface_to_usbdev(intf);
1135 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1136 struct usb_endpoint_descriptor *endpoint;
1137 unsigned char *cmd;
1138 u8 bulk_out_ep;
1139 int r;
1140
1141 /* Find bulk out endpoint */
11466f13
SS		 1142 for (r = 1; r >= 0; r--) {
1143 endpoint = &iface_desc->endpoint[r].desc;
1144 if (usb_endpoint_dir_out(endpoint) &&
1145 usb_endpoint_xfer_bulk(endpoint)) {
1146 bulk_out_ep = endpoint->bEndpointAddress;
1147 break;
1148 }
1149 }
1150 if (r == -1) {
a1030e92
DD		 1151 dev_err(&udev->dev,
1152 "zd1211rw: Could not find bulk out endpoint\n");
1153 return -ENODEV;
1154 }
1155
1156 cmd = kzalloc(31, GFP_KERNEL);
1157 if (cmd == NULL)
1158 return -ENODEV;
1159
1160 /* USB bulk command block */
1161 cmd[0] = 0x55; /* bulk command signature */
1162 cmd[1] = 0x53; /* bulk command signature */
1163 cmd[2] = 0x42; /* bulk command signature */
1164 cmd[3] = 0x43; /* bulk command signature */
1165 cmd[14] = 6; /* command length */
1166
1167 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1168 cmd[19] = 0x2; /* eject disc */
1169
1170 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1171 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1172 cmd, 31, NULL, 2000);
1173 kfree(cmd);
1174 if (r)
1175 return r;
1176
1177 /* At this point, the device disconnects and reconnects with the real
1178 * ID numbers. */
1179
1180 usb_set_intfdata(intf, NULL);
1181 return 0;
1182}
1183
74553aed
DD		 1184int zd_usb_init_hw(struct zd_usb *usb)
1185{
1186 int r;
1187 struct zd_mac *mac = zd_usb_to_mac(usb);
1188
1189 dev_dbg_f(zd_usb_dev(usb), "\n");
1190
1191 r = upload_firmware(usb);
1192 if (r) {
1193 dev_err(zd_usb_dev(usb),
1194 "couldn't load firmware. Error number %d\n", r);
1195 return r;
1196 }
1197
1198 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1199 if (r) {
1200 dev_dbg_f(zd_usb_dev(usb),
1201 "couldn't reset configuration. Error number %d\n", r);
1202 return r;
1203 }
1204
459c51ad 1205 r = zd_mac_init_hw(mac->hw);
74553aed
DD		 1206 if (r) {
1207 dev_dbg_f(zd_usb_dev(usb),
1208 "couldn't initialize mac. Error number %d\n", r);
1209 return r;
1210 }
1211
1212 usb->initialized = 1;
1213 return 0;
1214}
1215
e85d0918
DD		 1216static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1217{
1218 int r;
1219 struct usb_device *udev = interface_to_usbdev(intf);
459c51ad
DD		 1220 struct zd_usb *usb;
1221 struct ieee80211_hw *hw = NULL;
e85d0918
DD		 1222
1223 print_id(udev);
1224
a1030e92
DD		 1225 if (id->driver_info & DEVICE_INSTALLER)
1226 return eject_installer(intf);
1227
e85d0918
DD		 1228 switch (udev->speed) {
1229 case USB_SPEED_LOW:
1230 case USB_SPEED_FULL:
1231 case USB_SPEED_HIGH:
1232 break;
1233 default:
1234 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1235 r = -ENODEV;
1236 goto error;
1237 }
1238
459c51ad
DD		 1239 r = usb_reset_device(udev);
1240 if (r) {
1241 dev_err(&intf->dev,
1242 "couldn't reset usb device. Error number %d\n", r);
1243 goto error;
1244 }
6e3632f6 1245
459c51ad
DD		 1246 hw = zd_mac_alloc_hw(intf);
1247 if (hw == NULL) {
e85d0918
DD		 1248 r = -ENOMEM;
1249 goto error;
1250 }
1251
459c51ad 1252 usb = &zd_hw_mac(hw)->chip.usb;
74553aed 1253 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
e85d0918 1254
459c51ad 1255 r = zd_mac_preinit_hw(hw);
e85d0918
DD		 1256 if (r) {
1257 dev_dbg_f(&intf->dev,
1258 "couldn't initialize mac. Error number %d\n", r);
1259 goto error;
1260 }
1261
459c51ad 1262 r = ieee80211_register_hw(hw);
e85d0918
DD		 1263 if (r) {
1264 dev_dbg_f(&intf->dev,
459c51ad 1265 "couldn't register device. Error number %d\n", r);
e85d0918
DD		 1266 goto error;
1267 }
1268
1269 dev_dbg_f(&intf->dev, "successful\n");
459c51ad 1270 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
e85d0918
DD		 1271 return 0;
1272error:
1273 usb_reset_device(interface_to_usbdev(intf));
459c51ad
DD		 1274 if (hw) {
1275 zd_mac_clear(zd_hw_mac(hw));
1276 ieee80211_free_hw(hw);
1277 }
e85d0918
DD		 1278 return r;
1279}
1280
1281static void disconnect(struct usb_interface *intf)
1282{
459c51ad 1283 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
e0579d57
MP		 1284 struct zd_mac *mac;
1285 struct zd_usb *usb;
e85d0918 1286
a1030e92
DD		 1287 /* Either something really bad happened, or we're just dealing with
1288 * a DEVICE_INSTALLER. */
459c51ad 1289 if (hw == NULL)
a1030e92
DD		 1290 return;
1291
459c51ad 1292 mac = zd_hw_mac(hw);
e0579d57
MP		 1293 usb = &mac->chip.usb;
1294
e85d0918
DD		 1295 dev_dbg_f(zd_usb_dev(usb), "\n");
1296
459c51ad 1297 ieee80211_unregister_hw(hw);
e85d0918
DD		 1298
1299 /* Just in case something has gone wrong! */
78fc800f 1300 zd_usb_disable_tx(usb);
e85d0918
DD		 1301 zd_usb_disable_rx(usb);
1302 zd_usb_disable_int(usb);
1303
1304 /* If the disconnect has been caused by a removal of the
1305 * driver module, the reset allows reloading of the driver. If the
1306 * reset will not be executed here, the upload of the firmware in the
1307 * probe function caused by the reloading of the driver will fail.
1308 */
1309 usb_reset_device(interface_to_usbdev(intf));
1310
459c51ad
DD		 1311 zd_mac_clear(mac);
1312 ieee80211_free_hw(hw);
e85d0918
DD		 1313 dev_dbg(&intf->dev, "disconnected\n");
1314}
1315
a0fd751f
JK		 1316static void zd_usb_resume(struct zd_usb *usb)
1317{
1318 struct zd_mac *mac = zd_usb_to_mac(usb);
1319 int r;
1320
1321 dev_dbg_f(zd_usb_dev(usb), "\n");
1322
1323 r = zd_op_start(zd_usb_to_hw(usb));
1324 if (r < 0) {
1325 dev_warn(zd_usb_dev(usb), "Device resume failed "
1326 "with error code %d. Retrying...\n", r);
1327 if (usb->was_running)
1328 set_bit(ZD_DEVICE_RUNNING, &mac->flags);
1329 usb_queue_reset_device(usb->intf);
1330 return;
1331 }
1332
1333 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
1334 r = zd_restore_settings(mac);
1335 if (r < 0) {
1336 dev_dbg(zd_usb_dev(usb),
1337 "failed to restore settings, %d\n", r);
1338 return;
1339 }
1340 }
1341}
1342
1343static void zd_usb_stop(struct zd_usb *usb)
1344{
1345 dev_dbg_f(zd_usb_dev(usb), "\n");
1346
1347 zd_op_stop(zd_usb_to_hw(usb));
1348
1349 zd_usb_disable_tx(usb);
1350 zd_usb_disable_rx(usb);
1351 zd_usb_disable_int(usb);
1352
1353 usb->initialized = 0;
1354}
1355
1356static int pre_reset(struct usb_interface *intf)
1357{
1358 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1359 struct zd_mac *mac;
1360 struct zd_usb *usb;
1361
1362 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1363 return 0;
1364
1365 mac = zd_hw_mac(hw);
1366 usb = &mac->chip.usb;
1367
1368 usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
1369
1370 zd_usb_stop(usb);
1371
1372 mutex_lock(&mac->chip.mutex);
1373 return 0;
1374}
1375
1376static int post_reset(struct usb_interface *intf)
1377{
1378 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1379 struct zd_mac *mac;
1380 struct zd_usb *usb;
1381
1382 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1383 return 0;
1384
1385 mac = zd_hw_mac(hw);
1386 usb = &mac->chip.usb;
1387
1388 mutex_unlock(&mac->chip.mutex);
1389
1390 if (usb->was_running)
1391 zd_usb_resume(usb);
1392 return 0;
1393}
1394
e85d0918 1395static struct usb_driver driver = {
459c51ad 1396 .name = KBUILD_MODNAME,
e85d0918
DD		 1397 .id_table = usb_ids,
1398 .probe = probe,
1399 .disconnect = disconnect,
a0fd751f
JK		 1400 .pre_reset = pre_reset,
1401 .post_reset = post_reset,
e85d0918
DD		 1402};
1403
bc5f06a8
UK		 1404struct workqueue_struct *zd_workqueue;
1405
e85d0918
DD		 1406static int __init usb_init(void)
1407{
1408 int r;
1409
741fec53 1410 pr_debug("%s usb_init()\n", driver.name);
e85d0918 1411
bc5f06a8
UK		 1412 zd_workqueue = create_singlethread_workqueue(driver.name);
1413 if (zd_workqueue == NULL) {
741fec53 1414 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
bc5f06a8
UK		 1415 return -ENOMEM;
1416 }
1417
e85d0918
DD		 1418 r = usb_register(&driver);
1419 if (r) {
192b775c 1420 destroy_workqueue(zd_workqueue);
741fec53
UK		 1421 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1422 driver.name, r);
e85d0918
DD		 1423 return r;
1424 }
1425
741fec53 1426 pr_debug("%s initialized\n", driver.name);
e85d0918
DD		 1427 return 0;
1428}
1429
1430static void __exit usb_exit(void)
1431{
741fec53 1432 pr_debug("%s usb_exit()\n", driver.name);
e85d0918 1433 usb_deregister(&driver);
bc5f06a8 1434 destroy_workqueue(zd_workqueue);
e85d0918
DD		 1435}
1436
1437module_init(usb_init);
1438module_exit(usb_exit);
1439
1440static int usb_int_regs_length(unsigned int count)
1441{
1442 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1443}
1444
1445static void prepare_read_regs_int(struct zd_usb *usb)
1446{
1447 struct zd_usb_interrupt *intr = &usb->intr;
1448
a68077de 1449 spin_lock_irq(&intr->lock);
e85d0918
DD		 1450 intr->read_regs_enabled = 1;
1451 INIT_COMPLETION(intr->read_regs.completion);
a68077de
UK		 1452 spin_unlock_irq(&intr->lock);
1453}
1454
1455static void disable_read_regs_int(struct zd_usb *usb)
1456{
1457 struct zd_usb_interrupt *intr = &usb->intr;
1458
1459 spin_lock_irq(&intr->lock);
1460 intr->read_regs_enabled = 0;
1461 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1462}
1463
1464static int get_results(struct zd_usb *usb, u16 *values,
1465 struct usb_req_read_regs *req, unsigned int count)
1466{
1467 int r;
1468 int i;
1469 struct zd_usb_interrupt *intr = &usb->intr;
1470 struct read_regs_int *rr = &intr->read_regs;
1471 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1472
a68077de 1473 spin_lock_irq(&intr->lock);
e85d0918
DD		 1474
1475 r = -EIO;
1476 /* The created block size seems to be larger than expected.
1477 * However results appear to be correct.
1478 */
1479 if (rr->length < usb_int_regs_length(count)) {
1480 dev_dbg_f(zd_usb_dev(usb),
1481 "error: actual length %d less than expected %d\n",
1482 rr->length, usb_int_regs_length(count));
1483 goto error_unlock;
1484 }
1485 if (rr->length > sizeof(rr->buffer)) {
1486 dev_dbg_f(zd_usb_dev(usb),
1487 "error: actual length %d exceeds buffer size %zu\n",
1488 rr->length, sizeof(rr->buffer));
1489 goto error_unlock;
1490 }
1491
1492 for (i = 0; i < count; i++) {
1493 struct reg_data *rd = &regs->regs[i];
1494 if (rd->addr != req->addr[i]) {
1495 dev_dbg_f(zd_usb_dev(usb),
1496 "rd[%d] addr %#06hx expected %#06hx\n", i,
1497 le16_to_cpu(rd->addr),
1498 le16_to_cpu(req->addr[i]));
1499 goto error_unlock;
1500 }
1501 values[i] = le16_to_cpu(rd->value);
1502 }
1503
1504 r = 0;
1505error_unlock:
a68077de 1506 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1507 return r;
1508}
1509
1510int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1511 const zd_addr_t *addresses, unsigned int count)
1512{
1513 int r;
1514 int i, req_len, actual_req_len;
1515 struct usb_device *udev;
1516 struct usb_req_read_regs *req = NULL;
1517 unsigned long timeout;
1518
1519 if (count < 1) {
1520 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1521 return -EINVAL;
1522 }
1523 if (count > USB_MAX_IOREAD16_COUNT) {
1524 dev_dbg_f(zd_usb_dev(usb),
1525 "error: count %u exceeds possible max %u\n",
1526 count, USB_MAX_IOREAD16_COUNT);
1527 return -EINVAL;
1528 }
1529 if (in_atomic()) {
1530 dev_dbg_f(zd_usb_dev(usb),
1531 "error: io in atomic context not supported\n");
1532 return -EWOULDBLOCK;
1533 }
1534 if (!usb_int_enabled(usb)) {
9bca0c3b 1535 dev_dbg_f(zd_usb_dev(usb),
e85d0918
DD		 1536 "error: usb interrupt not enabled\n");
1537 return -EWOULDBLOCK;
1538 }
1539
9bca0c3b
JK		 1540 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1541 BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
1542 sizeof(__le16) > sizeof(usb->req_buf));
1543 BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
1544 sizeof(usb->req_buf));
1545
e85d0918 1546 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
9bca0c3b
JK		 1547 req = (void *)usb->req_buf;
1548
e85d0918
DD		 1549 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1550 for (i = 0; i < count; i++)
0ce34bc8 1551 req->addr[i] = cpu_to_le16((u16)addresses[i]);
e85d0918
DD		 1552
1553 udev = zd_usb_to_usbdev(usb);
1554 prepare_read_regs_int(usb);
1555 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
8f2d8f86 1556 req, req_len, &actual_req_len, 50 /* ms */);
e85d0918
DD		 1557 if (r) {
1558 dev_dbg_f(zd_usb_dev(usb),
1559 "error in usb_bulk_msg(). Error number %d\n", r);
1560 goto error;
1561 }
1562 if (req_len != actual_req_len) {
1563 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1564 " req_len %d != actual_req_len %d\n",
1565 req_len, actual_req_len);
1566 r = -EIO;
1567 goto error;
1568 }
1569
1570 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
8f2d8f86 1571 msecs_to_jiffies(50));
e85d0918
DD		 1572 if (!timeout) {
1573 disable_read_regs_int(usb);
1574 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1575 r = -ETIMEDOUT;
1576 goto error;
1577 }
1578
1579 r = get_results(usb, values, req, count);
1580error:
e85d0918
DD		 1581 return r;
1582}
1583
1584int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1585 unsigned int count)
1586{
1587 int r;
1588 struct usb_device *udev;
1589 struct usb_req_write_regs *req = NULL;
1590 int i, req_len, actual_req_len;
1591
1592 if (count == 0)
1593 return 0;
1594 if (count > USB_MAX_IOWRITE16_COUNT) {
1595 dev_dbg_f(zd_usb_dev(usb),
1596 "error: count %u exceeds possible max %u\n",
1597 count, USB_MAX_IOWRITE16_COUNT);
1598 return -EINVAL;
1599 }
1600 if (in_atomic()) {
1601 dev_dbg_f(zd_usb_dev(usb),
1602 "error: io in atomic context not supported\n");
1603 return -EWOULDBLOCK;
1604 }
1605
9bca0c3b
JK		 1606 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1607 BUILD_BUG_ON(sizeof(struct usb_req_write_regs) +
1608 USB_MAX_IOWRITE16_COUNT * sizeof(struct reg_data) >
1609 sizeof(usb->req_buf));
1610 BUG_ON(sizeof(struct usb_req_write_regs) +
1611 count * sizeof(struct reg_data) >
1612 sizeof(usb->req_buf));
1613
e85d0918
DD		 1614 req_len = sizeof(struct usb_req_write_regs) +
1615 count * sizeof(struct reg_data);
9bca0c3b 1616 req = (void *)usb->req_buf;
e85d0918
DD		 1617
1618 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1619 for (i = 0; i < count; i++) {
1620 struct reg_data *rw = &req->reg_writes[i];
0ce34bc8 1621 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
e85d0918
DD		 1622 rw->value = cpu_to_le16(ioreqs[i].value);
1623 }
1624
1625 udev = zd_usb_to_usbdev(usb);
1626 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
8f2d8f86 1627 req, req_len, &actual_req_len, 50 /* ms */);
e85d0918
DD		 1628 if (r) {
1629 dev_dbg_f(zd_usb_dev(usb),
1630 "error in usb_bulk_msg(). Error number %d\n", r);
1631 goto error;
1632 }
1633 if (req_len != actual_req_len) {
1634 dev_dbg_f(zd_usb_dev(usb),
1635 "error in usb_bulk_msg()"
1636 " req_len %d != actual_req_len %d\n",
1637 req_len, actual_req_len);
1638 r = -EIO;
1639 goto error;
1640 }
1641
1642 /* FALL-THROUGH with r == 0 */
1643error:
e85d0918
DD		 1644 return r;
1645}
1646
1647int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1648{
1649 int r;
1650 struct usb_device *udev;
1651 struct usb_req_rfwrite *req = NULL;
1652 int i, req_len, actual_req_len;
1653 u16 bit_value_template;
1654
1655 if (in_atomic()) {
1656 dev_dbg_f(zd_usb_dev(usb),
1657 "error: io in atomic context not supported\n");
1658 return -EWOULDBLOCK;
1659 }
1660 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1661 dev_dbg_f(zd_usb_dev(usb),
1662 "error: bits %d are smaller than"
1663 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1664 bits, USB_MIN_RFWRITE_BIT_COUNT);
1665 return -EINVAL;
1666 }
1667 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1668 dev_dbg_f(zd_usb_dev(usb),
1669 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1670 bits, USB_MAX_RFWRITE_BIT_COUNT);
1671 return -EINVAL;
1672 }
1673#ifdef DEBUG
1674 if (value & (~0UL << bits)) {
1675 dev_dbg_f(zd_usb_dev(usb),
1676 "error: value %#09x has bits >= %d set\n",
1677 value, bits);
1678 return -EINVAL;
1679 }
1680#endif /* DEBUG */
1681
1682 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1683
1684 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1685 if (r) {
1686 dev_dbg_f(zd_usb_dev(usb),
1687 "error %d: Couldn't read CR203\n", r);
9bca0c3b 1688 return r;
e85d0918
DD		 1689 }
1690 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1691
9bca0c3b
JK		 1692 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1693 BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
1694 USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
1695 sizeof(usb->req_buf));
1696 BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
1697 sizeof(usb->req_buf));
1698
e85d0918 1699 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
9bca0c3b 1700 req = (void *)usb->req_buf;
e85d0918
DD		 1701
1702 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1703 /* 1: 3683a, but not used in ZYDAS driver */
1704 req->value = cpu_to_le16(2);
1705 req->bits = cpu_to_le16(bits);
1706
1707 for (i = 0; i < bits; i++) {
1708 u16 bv = bit_value_template;
1709 if (value & (1 << (bits-1-i)))
1710 bv |= RF_DATA;
1711 req->bit_values[i] = cpu_to_le16(bv);
1712 }
1713
1714 udev = zd_usb_to_usbdev(usb);
1715 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
8f2d8f86 1716 req, req_len, &actual_req_len, 50 /* ms */);
e85d0918
DD		 1717 if (r) {
1718 dev_dbg_f(zd_usb_dev(usb),
1719 "error in usb_bulk_msg(). Error number %d\n", r);
1720 goto out;
1721 }
1722 if (req_len != actual_req_len) {
1723 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1724 " req_len %d != actual_req_len %d\n",
1725 req_len, actual_req_len);
1726 r = -EIO;
1727 goto out;
1728 }
1729
1730 /* FALL-THROUGH with r == 0 */
1731out:
e85d0918
DD		 1732 return r;
1733}
Linux kernel - Deliverables
This page took 1.016535 seconds and 5 git commands to generate.