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zd1201: declare MODULE_FIRMWARE
[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>
27#include <linux/skbuff.h>
28#include <linux/usb.h>
bc5f06a8 29#include <linux/workqueue.h>
459c51ad 30#include <net/mac80211.h>
c248725b 31#include <asm/unaligned.h>
e85d0918
DD		 32
33#include "zd_def.h"
e85d0918
DD		 34#include "zd_mac.h"
35#include "zd_usb.h"
e85d0918
DD		 36
37static struct usb_device_id usb_ids[] = {
38 /* ZD1211 */
3bfbe80e
HTL		 39 { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 },
40 { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 },
43 { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
44 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
45 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
e85d0918 46 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
14990c69 47 { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 48 { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
49 { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
50 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
e85d0918 51 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
aa1d3a18 52 { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 53 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
54 { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 },
55 { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
f2423723 56 { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
229782a3 57 { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
269fca0e 58 { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 59 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
60 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
61 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
62 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
e85d0918 63 /* ZD1211B */
3bfbe80e
HTL		 64 { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
65 { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
66 { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
67 { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
68 { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
8b339d05 69 { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 70 { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
71 { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
72 { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
73 { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
74 { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
dd2f5538 75 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 76 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B },
77 { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B },
78 { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
8f75e07a 79 { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B },
f72151fb 80 { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B },
9dfd5500 81 { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 82 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
83 { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B },
aec91028 84 { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
c445a31c 85 { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
8e97afe5 86 { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
de262496 87 { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 88 { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
89 { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
90 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
91 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
92 { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
a1030e92
DD		 93 /* "Driverless" devices that need ejecting */
94 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
aa1d3a18 95 { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER },
e85d0918
DD		 96 {}
97};
98
99MODULE_LICENSE("GPL");
100MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
101MODULE_AUTHOR("Ulrich Kunitz");
102MODULE_AUTHOR("Daniel Drake");
103MODULE_VERSION("1.0");
104MODULE_DEVICE_TABLE(usb, usb_ids);
105
106#define FW_ZD1211_PREFIX "zd1211/zd1211_"
107#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
108
e85d0918 109/* USB device initialization */
72e77a8a 110static void int_urb_complete(struct urb *urb);
e85d0918
DD		 111
112static int request_fw_file(
113 const struct firmware **fw, const char *name, struct device *device)
114{
115 int r;
116
117 dev_dbg_f(device, "fw name %s\n", name);
118
119 r = request_firmware(fw, name, device);
120 if (r)
121 dev_err(device,
122 "Could not load firmware file %s. Error number %d\n",
123 name, r);
124 return r;
125}
126
127static inline u16 get_bcdDevice(const struct usb_device *udev)
128{
129 return le16_to_cpu(udev->descriptor.bcdDevice);
130}
131
132enum upload_code_flags {
133 REBOOT = 1,
134};
135
136/* Ensures that MAX_TRANSFER_SIZE is even. */
137#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
138
139static int upload_code(struct usb_device *udev,
140 const u8 *data, size_t size, u16 code_offset, int flags)
141{
142 u8 *p;
143 int r;
144
145 /* USB request blocks need "kmalloced" buffers.
146 */
147 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
148 if (!p) {
149 dev_err(&udev->dev, "out of memory\n");
150 r = -ENOMEM;
151 goto error;
152 }
153
154 size &= ~1;
155 while (size > 0) {
156 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
157 size : MAX_TRANSFER_SIZE;
158
159 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
160
161 memcpy(p, data, transfer_size);
162 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
163 USB_REQ_FIRMWARE_DOWNLOAD,
164 USB_DIR_OUT | USB_TYPE_VENDOR,
165 code_offset, 0, p, transfer_size, 1000 /* ms */);
166 if (r < 0) {
167 dev_err(&udev->dev,
168 "USB control request for firmware upload"
169 " failed. Error number %d\n", r);
170 goto error;
171 }
172 transfer_size = r & ~1;
173
174 size -= transfer_size;
175 data += transfer_size;
176 code_offset += transfer_size/sizeof(u16);
177 }
178
179 if (flags & REBOOT) {
180 u8 ret;
181
a8c4ea7a 182 /* Use "DMA-aware" buffer. */
e85d0918
DD		 183 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
184 USB_REQ_FIRMWARE_CONFIRM,
185 USB_DIR_IN | USB_TYPE_VENDOR,
a8c4ea7a 186 0, 0, p, sizeof(ret), 5000 /* ms */);
e85d0918
DD		 187 if (r != sizeof(ret)) {
188 dev_err(&udev->dev,
189 "control request firmeware confirmation failed."
190 " Return value %d\n", r);
191 if (r >= 0)
192 r = -ENODEV;
193 goto error;
194 }
a8c4ea7a 195 ret = p[0];
e85d0918
DD		 196 if (ret & 0x80) {
197 dev_err(&udev->dev,
198 "Internal error while downloading."
199 " Firmware confirm return value %#04x\n",
200 (unsigned int)ret);
201 r = -ENODEV;
202 goto error;
203 }
204 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
205 (unsigned int)ret);
206 }
207
208 r = 0;
209error:
210 kfree(p);
211 return r;
212}
213
214static u16 get_word(const void *data, u16 offset)
215{
216 const __le16 *p = data;
217 return le16_to_cpu(p[offset]);
218}
219
74553aed 220static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size,
e85d0918
DD		 221 const char* postfix)
222{
223 scnprintf(buffer, size, "%s%s",
74553aed 224 usb->is_zd1211b ?
e85d0918
DD		 225 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
226 postfix);
227 return buffer;
228}
229
74553aed 230static int handle_version_mismatch(struct zd_usb *usb,
d066c219
DD		 231 const struct firmware *ub_fw)
232{
74553aed 233 struct usb_device *udev = zd_usb_to_usbdev(usb);
d066c219
DD		 234 const struct firmware *ur_fw = NULL;
235 int offset;
236 int r = 0;
237 char fw_name[128];
238
239 r = request_fw_file(&ur_fw,
74553aed 240 get_fw_name(usb, fw_name, sizeof(fw_name), "ur"),
d066c219
DD		 241 &udev->dev);
242 if (r)
243 goto error;
244
ee302767 245 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
d066c219
DD		 246 if (r)
247 goto error;
248
ee302767 249 offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
d066c219 250 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
ee302767 251 E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
d066c219
DD		 252
253 /* At this point, the vendor driver downloads the whole firmware
254 * image, hacks around with version IDs, and uploads it again,
255 * completely overwriting the boot code. We do not do this here as
256 * it is not required on any tested devices, and it is suspected to
257 * cause problems. */
258error:
259 release_firmware(ur_fw);
260 return r;
261}
262
74553aed 263static int upload_firmware(struct zd_usb *usb)
e85d0918
DD		 264{
265 int r;
266 u16 fw_bcdDevice;
267 u16 bcdDevice;
74553aed 268 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918
DD		 269 const struct firmware *ub_fw = NULL;
270 const struct firmware *uph_fw = NULL;
271 char fw_name[128];
272
273 bcdDevice = get_bcdDevice(udev);
274
275 r = request_fw_file(&ub_fw,
74553aed 276 get_fw_name(usb, fw_name, sizeof(fw_name), "ub"),
e85d0918
DD		 277 &udev->dev);
278 if (r)
279 goto error;
280
ee302767 281 fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
e85d0918 282
e85d0918
DD		 283 if (fw_bcdDevice != bcdDevice) {
284 dev_info(&udev->dev,
d066c219
DD		 285 "firmware version %#06x and device bootcode version "
286 "%#06x differ\n", fw_bcdDevice, bcdDevice);
287 if (bcdDevice <= 0x4313)
288 dev_warn(&udev->dev, "device has old bootcode, please "
289 "report success or failure\n");
290
74553aed 291 r = handle_version_mismatch(usb, ub_fw);
d066c219
DD		 292 if (r)
293 goto error;
e85d0918
DD		 294 } else {
295 dev_dbg_f(&udev->dev,
296 "firmware device id %#06x is equal to the "
297 "actual device id\n", fw_bcdDevice);
298 }
299
300
301 r = request_fw_file(&uph_fw,
74553aed 302 get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"),
e85d0918
DD		 303 &udev->dev);
304 if (r)
305 goto error;
306
ee302767 307 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
e85d0918
DD		 308 if (r) {
309 dev_err(&udev->dev,
310 "Could not upload firmware code uph. Error number %d\n",
311 r);
312 }
313
314 /* FALL-THROUGH */
315error:
316 release_firmware(ub_fw);
317 release_firmware(uph_fw);
318 return r;
319}
320
74553aed
DD		 321/* Read data from device address space using "firmware interface" which does
322 * not require firmware to be loaded. */
323int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
324{
325 int r;
326 struct usb_device *udev = zd_usb_to_usbdev(usb);
a8c4ea7a 327 u8 *buf;
74553aed 328
a8c4ea7a
AN		 329 /* Use "DMA-aware" buffer. */
330 buf = kmalloc(len, GFP_KERNEL);
331 if (!buf)
332 return -ENOMEM;
74553aed
DD		 333 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
334 USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
a8c4ea7a 335 buf, len, 5000);
74553aed
DD		 336 if (r < 0) {
337 dev_err(&udev->dev,
338 "read over firmware interface failed: %d\n", r);
a8c4ea7a 339 goto exit;
74553aed
DD		 340 } else if (r != len) {
341 dev_err(&udev->dev,
342 "incomplete read over firmware interface: %d/%d\n",
343 r, len);
a8c4ea7a
AN		 344 r = -EIO;
345 goto exit;
74553aed 346 }
a8c4ea7a
AN		 347 r = 0;
348 memcpy(data, buf, len);
349exit:
350 kfree(buf);
351 return r;
74553aed
DD		 352}
353
e85d0918
DD		 354#define urb_dev(urb) (&(urb)->dev->dev)
355
356static inline void handle_regs_int(struct urb *urb)
357{
358 struct zd_usb *usb = urb->context;
359 struct zd_usb_interrupt *intr = &usb->intr;
360 int len;
72e77a8a 361 u16 int_num;
e85d0918
DD		 362
363 ZD_ASSERT(in_interrupt());
364 spin_lock(&intr->lock);
365
d63ddcec 366 int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
72e77a8a
LCC		 367 if (int_num == CR_INTERRUPT) {
368 struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
369 memcpy(&mac->intr_buffer, urb->transfer_buffer,
370 USB_MAX_EP_INT_BUFFER);
371 schedule_work(&mac->process_intr);
372 } else if (intr->read_regs_enabled) {
e85d0918
DD		 373 intr->read_regs.length = len = urb->actual_length;
374
375 if (len > sizeof(intr->read_regs.buffer))
376 len = sizeof(intr->read_regs.buffer);
377 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
378 intr->read_regs_enabled = 0;
379 complete(&intr->read_regs.completion);
380 goto out;
381 }
382
e85d0918
DD		 383out:
384 spin_unlock(&intr->lock);
385}
386
7d12e780 387static void int_urb_complete(struct urb *urb)
e85d0918
DD		 388{
389 int r;
390 struct usb_int_header *hdr;
391
392 switch (urb->status) {
393 case 0:
394 break;
395 case -ESHUTDOWN:
396 case -EINVAL:
397 case -ENODEV:
398 case -ENOENT:
399 case -ECONNRESET:
e85d0918 400 case -EPIPE:
b312d799 401 goto kfree;
e85d0918
DD		 402 default:
403 goto resubmit;
404 }
405
406 if (urb->actual_length < sizeof(hdr)) {
407 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
408 goto resubmit;
409 }
410
411 hdr = urb->transfer_buffer;
412 if (hdr->type != USB_INT_TYPE) {
413 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
414 goto resubmit;
415 }
416
417 switch (hdr->id) {
418 case USB_INT_ID_REGS:
419 handle_regs_int(urb);
420 break;
421 case USB_INT_ID_RETRY_FAILED:
7f4013f0 422 zd_mac_tx_failed(urb);
e85d0918
DD		 423 break;
424 default:
425 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
426 (unsigned int)hdr->id);
427 goto resubmit;
428 }
429
430resubmit:
431 r = usb_submit_urb(urb, GFP_ATOMIC);
432 if (r) {
433 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
434 goto kfree;
435 }
436 return;
437kfree:
438 kfree(urb->transfer_buffer);
439}
440
441static inline int int_urb_interval(struct usb_device *udev)
442{
443 switch (udev->speed) {
444 case USB_SPEED_HIGH:
445 return 4;
446 case USB_SPEED_LOW:
447 return 10;
448 case USB_SPEED_FULL:
449 default:
450 return 1;
451 }
452}
453
454static inline int usb_int_enabled(struct zd_usb *usb)
455{
456 unsigned long flags;
457 struct zd_usb_interrupt *intr = &usb->intr;
458 struct urb *urb;
459
460 spin_lock_irqsave(&intr->lock, flags);
461 urb = intr->urb;
462 spin_unlock_irqrestore(&intr->lock, flags);
463 return urb != NULL;
464}
465
466int zd_usb_enable_int(struct zd_usb *usb)
467{
468 int r;
469 struct usb_device *udev;
470 struct zd_usb_interrupt *intr = &usb->intr;
471 void *transfer_buffer = NULL;
472 struct urb *urb;
473
474 dev_dbg_f(zd_usb_dev(usb), "\n");
475
35c3404e 476 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 477 if (!urb) {
478 r = -ENOMEM;
479 goto out;
480 }
481
482 ZD_ASSERT(!irqs_disabled());
483 spin_lock_irq(&intr->lock);
484 if (intr->urb) {
485 spin_unlock_irq(&intr->lock);
486 r = 0;
487 goto error_free_urb;
488 }
489 intr->urb = urb;
490 spin_unlock_irq(&intr->lock);
491
492 /* TODO: make it a DMA buffer */
493 r = -ENOMEM;
35c3404e 494 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL);
e85d0918
DD		 495 if (!transfer_buffer) {
496 dev_dbg_f(zd_usb_dev(usb),
497 "couldn't allocate transfer_buffer\n");
498 goto error_set_urb_null;
499 }
500
501 udev = zd_usb_to_usbdev(usb);
502 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
503 transfer_buffer, USB_MAX_EP_INT_BUFFER,
504 int_urb_complete, usb,
505 intr->interval);
506
507 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
35c3404e 508 r = usb_submit_urb(urb, GFP_KERNEL);
e85d0918
DD		 509 if (r) {
510 dev_dbg_f(zd_usb_dev(usb),
511 "Couldn't submit urb. Error number %d\n", r);
512 goto error;
513 }
514
515 return 0;
516error:
517 kfree(transfer_buffer);
518error_set_urb_null:
519 spin_lock_irq(&intr->lock);
520 intr->urb = NULL;
521 spin_unlock_irq(&intr->lock);
522error_free_urb:
523 usb_free_urb(urb);
524out:
525 return r;
526}
527
528void zd_usb_disable_int(struct zd_usb *usb)
529{
530 unsigned long flags;
531 struct zd_usb_interrupt *intr = &usb->intr;
532 struct urb *urb;
533
534 spin_lock_irqsave(&intr->lock, flags);
535 urb = intr->urb;
536 if (!urb) {
537 spin_unlock_irqrestore(&intr->lock, flags);
538 return;
539 }
540 intr->urb = NULL;
541 spin_unlock_irqrestore(&intr->lock, flags);
542
543 usb_kill_urb(urb);
544 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
545 usb_free_urb(urb);
546}
547
548static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
549 unsigned int length)
550{
551 int i;
e85d0918
DD		 552 const struct rx_length_info *length_info;
553
554 if (length < sizeof(struct rx_length_info)) {
555 /* It's not a complete packet anyhow. */
7f4013f0
BP		 556 printk("%s: invalid, small RX packet : %d\n",
557 __func__, length);
e85d0918
DD		 558 return;
559 }
560 length_info = (struct rx_length_info *)
561 (buffer + length - sizeof(struct rx_length_info));
562
563 /* It might be that three frames are merged into a single URB
564 * transaction. We have to check for the length info tag.
565 *
566 * While testing we discovered that length_info might be unaligned,
567 * because if USB transactions are merged, the last packet will not
568 * be padded. Unaligned access might also happen if the length_info
569 * structure is not present.
570 */
533dd1b0 571 if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
b269825b 572 {
e85d0918
DD		 573 unsigned int l, k, n;
574 for (i = 0, l = 0;; i++) {
533dd1b0 575 k = get_unaligned_le16(&length_info->length[i]);
850c211c
UK		 576 if (k == 0)
577 return;
e85d0918
DD		 578 n = l+k;
579 if (n > length)
580 return;
459c51ad 581 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
e85d0918
DD		 582 if (i >= 2)
583 return;
584 l = (n+3) & ~3;
585 }
586 } else {
459c51ad 587 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
e85d0918
DD		 588 }
589}
590
7d12e780 591static void rx_urb_complete(struct urb *urb)
e85d0918
DD		 592{
593 struct zd_usb *usb;
594 struct zd_usb_rx *rx;
595 const u8 *buffer;
596 unsigned int length;
597
598 switch (urb->status) {
599 case 0:
600 break;
601 case -ESHUTDOWN:
602 case -EINVAL:
603 case -ENODEV:
604 case -ENOENT:
605 case -ECONNRESET:
e85d0918 606 case -EPIPE:
b312d799 607 return;
e85d0918
DD		 608 default:
609 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
610 goto resubmit;
611 }
612
613 buffer = urb->transfer_buffer;
614 length = urb->actual_length;
615 usb = urb->context;
616 rx = &usb->rx;
617
618 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
619 /* If there is an old first fragment, we don't care. */
620 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
621 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
622 spin_lock(&rx->lock);
623 memcpy(rx->fragment, buffer, length);
624 rx->fragment_length = length;
625 spin_unlock(&rx->lock);
626 goto resubmit;
627 }
628
629 spin_lock(&rx->lock);
630 if (rx->fragment_length > 0) {
631 /* We are on a second fragment, we believe */
632 ZD_ASSERT(length + rx->fragment_length <=
633 ARRAY_SIZE(rx->fragment));
634 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
635 memcpy(rx->fragment+rx->fragment_length, buffer, length);
636 handle_rx_packet(usb, rx->fragment,
637 rx->fragment_length + length);
638 rx->fragment_length = 0;
639 spin_unlock(&rx->lock);
640 } else {
641 spin_unlock(&rx->lock);
642 handle_rx_packet(usb, buffer, length);
643 }
644
645resubmit:
646 usb_submit_urb(urb, GFP_ATOMIC);
647}
648
459c51ad 649static struct urb *alloc_rx_urb(struct zd_usb *usb)
e85d0918
DD		 650{
651 struct usb_device *udev = zd_usb_to_usbdev(usb);
652 struct urb *urb;
653 void *buffer;
654
35c3404e 655 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 656 if (!urb)
657 return NULL;
35c3404e 658 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
e85d0918
DD		 659 &urb->transfer_dma);
660 if (!buffer) {
661 usb_free_urb(urb);
662 return NULL;
663 }
664
665 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
666 buffer, USB_MAX_RX_SIZE,
667 rx_urb_complete, usb);
668 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
669
670 return urb;
671}
672
459c51ad 673static void free_rx_urb(struct urb *urb)
e85d0918
DD		 674{
675 if (!urb)
676 return;
677 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
678 urb->transfer_buffer, urb->transfer_dma);
679 usb_free_urb(urb);
680}
681
682int zd_usb_enable_rx(struct zd_usb *usb)
683{
684 int i, r;
685 struct zd_usb_rx *rx = &usb->rx;
686 struct urb **urbs;
687
688 dev_dbg_f(zd_usb_dev(usb), "\n");
689
690 r = -ENOMEM;
459c51ad 691 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
e85d0918
DD		 692 if (!urbs)
693 goto error;
459c51ad
DD		 694 for (i = 0; i < RX_URBS_COUNT; i++) {
695 urbs[i] = alloc_rx_urb(usb);
e85d0918
DD		 696 if (!urbs[i])
697 goto error;
698 }
699
700 ZD_ASSERT(!irqs_disabled());
701 spin_lock_irq(&rx->lock);
702 if (rx->urbs) {
703 spin_unlock_irq(&rx->lock);
704 r = 0;
705 goto error;
706 }
707 rx->urbs = urbs;
459c51ad 708 rx->urbs_count = RX_URBS_COUNT;
e85d0918
DD		 709 spin_unlock_irq(&rx->lock);
710
459c51ad 711 for (i = 0; i < RX_URBS_COUNT; i++) {
35c3404e 712 r = usb_submit_urb(urbs[i], GFP_KERNEL);
e85d0918
DD		 713 if (r)
714 goto error_submit;
715 }
716
717 return 0;
718error_submit:
459c51ad 719 for (i = 0; i < RX_URBS_COUNT; i++) {
e85d0918
DD		 720 usb_kill_urb(urbs[i]);
721 }
722 spin_lock_irq(&rx->lock);
723 rx->urbs = NULL;
724 rx->urbs_count = 0;
725 spin_unlock_irq(&rx->lock);
726error:
727 if (urbs) {
459c51ad
DD		 728 for (i = 0; i < RX_URBS_COUNT; i++)
729 free_rx_urb(urbs[i]);
e85d0918
DD		 730 }
731 return r;
732}
733
734void zd_usb_disable_rx(struct zd_usb *usb)
735{
736 int i;
737 unsigned long flags;
738 struct urb **urbs;
739 unsigned int count;
740 struct zd_usb_rx *rx = &usb->rx;
741
742 spin_lock_irqsave(&rx->lock, flags);
743 urbs = rx->urbs;
744 count = rx->urbs_count;
745 spin_unlock_irqrestore(&rx->lock, flags);
746 if (!urbs)
747 return;
748
749 for (i = 0; i < count; i++) {
750 usb_kill_urb(urbs[i]);
459c51ad 751 free_rx_urb(urbs[i]);
e85d0918
DD		 752 }
753 kfree(urbs);
754
755 spin_lock_irqsave(&rx->lock, flags);
756 rx->urbs = NULL;
757 rx->urbs_count = 0;
758 spin_unlock_irqrestore(&rx->lock, flags);
759}
760
459c51ad
DD		 761/**
762 * zd_usb_disable_tx - disable transmission
763 * @usb: the zd1211rw-private USB structure
764 *
765 * Frees all URBs in the free list and marks the transmission as disabled.
766 */
767void zd_usb_disable_tx(struct zd_usb *usb)
768{
769 struct zd_usb_tx *tx = &usb->tx;
770 unsigned long flags;
771 struct list_head *pos, *n;
772
773 spin_lock_irqsave(&tx->lock, flags);
774 list_for_each_safe(pos, n, &tx->free_urb_list) {
775 list_del(pos);
776 usb_free_urb(list_entry(pos, struct urb, urb_list));
777 }
778 tx->enabled = 0;
779 tx->submitted_urbs = 0;
780 /* The stopped state is ignored, relying on ieee80211_wake_queues()
781 * in a potentionally following zd_usb_enable_tx().
782 */
783 spin_unlock_irqrestore(&tx->lock, flags);
784}
785
786/**
787 * zd_usb_enable_tx - enables transmission
788 * @usb: a &struct zd_usb pointer
789 *
790 * This function enables transmission and prepares the &zd_usb_tx data
791 * structure.
792 */
793void zd_usb_enable_tx(struct zd_usb *usb)
794{
795 unsigned long flags;
796 struct zd_usb_tx *tx = &usb->tx;
797
798 spin_lock_irqsave(&tx->lock, flags);
799 tx->enabled = 1;
800 tx->submitted_urbs = 0;
801 ieee80211_wake_queues(zd_usb_to_hw(usb));
802 tx->stopped = 0;
803 spin_unlock_irqrestore(&tx->lock, flags);
804}
805
806/**
807 * alloc_tx_urb - provides an tx URB
808 * @usb: a &struct zd_usb pointer
809 *
810 * Allocates a new URB. If possible takes the urb from the free list in
811 * usb->tx.
812 */
813static struct urb *alloc_tx_urb(struct zd_usb *usb)
814{
815 struct zd_usb_tx *tx = &usb->tx;
816 unsigned long flags;
817 struct list_head *entry;
818 struct urb *urb;
819
820 spin_lock_irqsave(&tx->lock, flags);
821 if (list_empty(&tx->free_urb_list)) {
822 urb = usb_alloc_urb(0, GFP_ATOMIC);
823 goto out;
824 }
825 entry = tx->free_urb_list.next;
826 list_del(entry);
827 urb = list_entry(entry, struct urb, urb_list);
828out:
829 spin_unlock_irqrestore(&tx->lock, flags);
830 return urb;
831}
832
833/**
834 * free_tx_urb - frees a used tx URB
835 * @usb: a &struct zd_usb pointer
836 * @urb: URB to be freed
837 *
838 * Frees the the transmission URB, which means to put it on the free URB
839 * list.
840 */
841static void free_tx_urb(struct zd_usb *usb, struct urb *urb)
842{
843 struct zd_usb_tx *tx = &usb->tx;
844 unsigned long flags;
845
846 spin_lock_irqsave(&tx->lock, flags);
847 if (!tx->enabled) {
848 usb_free_urb(urb);
849 goto out;
850 }
851 list_add(&urb->urb_list, &tx->free_urb_list);
852out:
853 spin_unlock_irqrestore(&tx->lock, flags);
854}
855
856static void tx_dec_submitted_urbs(struct zd_usb *usb)
857{
858 struct zd_usb_tx *tx = &usb->tx;
859 unsigned long flags;
860
861 spin_lock_irqsave(&tx->lock, flags);
862 --tx->submitted_urbs;
863 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
864 ieee80211_wake_queues(zd_usb_to_hw(usb));
865 tx->stopped = 0;
866 }
867 spin_unlock_irqrestore(&tx->lock, flags);
868}
869
870static void tx_inc_submitted_urbs(struct zd_usb *usb)
871{
872 struct zd_usb_tx *tx = &usb->tx;
873 unsigned long flags;
874
875 spin_lock_irqsave(&tx->lock, flags);
876 ++tx->submitted_urbs;
877 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
878 ieee80211_stop_queues(zd_usb_to_hw(usb));
879 tx->stopped = 1;
880 }
881 spin_unlock_irqrestore(&tx->lock, flags);
882}
883
884/**
885 * tx_urb_complete - completes the execution of an URB
886 * @urb: a URB
887 *
888 * This function is called if the URB has been transferred to a device or an
889 * error has happened.
890 */
7d12e780 891static void tx_urb_complete(struct urb *urb)
e85d0918
DD		 892{
893 int r;
459c51ad 894 struct sk_buff *skb;
e039fa4a 895 struct ieee80211_tx_info *info;
459c51ad 896 struct zd_usb *usb;
e85d0918
DD		 897
898 switch (urb->status) {
899 case 0:
900 break;
901 case -ESHUTDOWN:
902 case -EINVAL:
903 case -ENODEV:
904 case -ENOENT:
905 case -ECONNRESET:
b312d799 906 case -EPIPE:
e85d0918
DD		 907 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
908 break;
e85d0918
DD		 909 default:
910 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
911 goto resubmit;
912 }
913free_urb:
459c51ad 914 skb = (struct sk_buff *)urb->context;
dbabad0c
JB		 915 /*
916 * grab 'usb' pointer before handing off the skb (since
917 * it might be freed by zd_mac_tx_to_dev or mac80211)
918 */
e039fa4a 919 info = IEEE80211_SKB_CB(skb);
e6a9854b 920 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
dbabad0c 921 zd_mac_tx_to_dev(skb, urb->status);
459c51ad
DD		 922 free_tx_urb(usb, urb);
923 tx_dec_submitted_urbs(usb);
e85d0918
DD		 924 return;
925resubmit:
926 r = usb_submit_urb(urb, GFP_ATOMIC);
927 if (r) {
928 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
929 goto free_urb;
930 }
931}
932
459c51ad
DD		 933/**
934 * zd_usb_tx: initiates transfer of a frame of the device
935 *
936 * @usb: the zd1211rw-private USB structure
937 * @skb: a &struct sk_buff pointer
938 *
939 * This function tranmits a frame to the device. It doesn't wait for
940 * completion. The frame must contain the control set and have all the
941 * control set information available.
942 *
943 * The function returns 0 if the transfer has been successfully initiated.
e85d0918 944 */
459c51ad 945int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
e85d0918
DD		 946{
947 int r;
948 struct usb_device *udev = zd_usb_to_usbdev(usb);
949 struct urb *urb;
e85d0918 950
459c51ad 951 urb = alloc_tx_urb(usb);
e85d0918
DD		 952 if (!urb) {
953 r = -ENOMEM;
954 goto out;
955 }
956
e85d0918 957 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
459c51ad 958 skb->data, skb->len, tx_urb_complete, skb);
e85d0918
DD		 959
960 r = usb_submit_urb(urb, GFP_ATOMIC);
961 if (r)
962 goto error;
459c51ad 963 tx_inc_submitted_urbs(usb);
e85d0918
DD		 964 return 0;
965error:
459c51ad 966 free_tx_urb(usb, urb);
e85d0918
DD		 967out:
968 return r;
969}
970
971static inline void init_usb_interrupt(struct zd_usb *usb)
972{
973 struct zd_usb_interrupt *intr = &usb->intr;
974
975 spin_lock_init(&intr->lock);
976 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
977 init_completion(&intr->read_regs.completion);
0ce34bc8 978 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
e85d0918
DD		 979}
980
981static inline void init_usb_rx(struct zd_usb *usb)
982{
983 struct zd_usb_rx *rx = &usb->rx;
984 spin_lock_init(&rx->lock);
985 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
986 rx->usb_packet_size = 512;
987 } else {
988 rx->usb_packet_size = 64;
989 }
990 ZD_ASSERT(rx->fragment_length == 0);
991}
992
993static inline void init_usb_tx(struct zd_usb *usb)
994{
459c51ad
DD		 995 struct zd_usb_tx *tx = &usb->tx;
996 spin_lock_init(&tx->lock);
997 tx->enabled = 0;
998 tx->stopped = 0;
999 INIT_LIST_HEAD(&tx->free_urb_list);
1000 tx->submitted_urbs = 0;
e85d0918
DD		 1001}
1002
459c51ad 1003void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
e85d0918
DD		 1004 struct usb_interface *intf)
1005{
1006 memset(usb, 0, sizeof(*usb));
1007 usb->intf = usb_get_intf(intf);
459c51ad 1008 usb_set_intfdata(usb->intf, hw);
e85d0918
DD		 1009 init_usb_interrupt(usb);
1010 init_usb_tx(usb);
1011 init_usb_rx(usb);
1012}
1013
e85d0918
DD		 1014void zd_usb_clear(struct zd_usb *usb)
1015{
1016 usb_set_intfdata(usb->intf, NULL);
1017 usb_put_intf(usb->intf);
c48cf125 1018 ZD_MEMCLEAR(usb, sizeof(*usb));
e85d0918
DD		 1019 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1020}
1021
1022static const char *speed(enum usb_device_speed speed)
1023{
1024 switch (speed) {
1025 case USB_SPEED_LOW:
1026 return "low";
1027 case USB_SPEED_FULL:
1028 return "full";
1029 case USB_SPEED_HIGH:
1030 return "high";
1031 default:
1032 return "unknown speed";
1033 }
1034}
1035
1036static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1037{
1038 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1039 le16_to_cpu(udev->descriptor.idVendor),
1040 le16_to_cpu(udev->descriptor.idProduct),
1041 get_bcdDevice(udev),
1042 speed(udev->speed));
1043}
1044
1045int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1046{
1047 struct usb_device *udev = interface_to_usbdev(usb->intf);
1048 return scnprint_id(udev, buffer, size);
1049}
1050
1051#ifdef DEBUG
1052static void print_id(struct usb_device *udev)
1053{
1054 char buffer[40];
1055
1056 scnprint_id(udev, buffer, sizeof(buffer));
1057 buffer[sizeof(buffer)-1] = 0;
1058 dev_dbg_f(&udev->dev, "%s\n", buffer);
1059}
1060#else
1061#define print_id(udev) do { } while (0)
1062#endif
1063
a1030e92
DD		 1064static int eject_installer(struct usb_interface *intf)
1065{
1066 struct usb_device *udev = interface_to_usbdev(intf);
1067 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1068 struct usb_endpoint_descriptor *endpoint;
1069 unsigned char *cmd;
1070 u8 bulk_out_ep;
1071 int r;
1072
1073 /* Find bulk out endpoint */
1074 endpoint = &iface_desc->endpoint[1].desc;
33e2fb2f 1075 if (usb_endpoint_dir_out(endpoint) &&
f201a8a4 1076 usb_endpoint_xfer_bulk(endpoint)) {
a1030e92
DD		 1077 bulk_out_ep = endpoint->bEndpointAddress;
1078 } else {
1079 dev_err(&udev->dev,
1080 "zd1211rw: Could not find bulk out endpoint\n");
1081 return -ENODEV;
1082 }
1083
1084 cmd = kzalloc(31, GFP_KERNEL);
1085 if (cmd == NULL)
1086 return -ENODEV;
1087
1088 /* USB bulk command block */
1089 cmd[0] = 0x55; /* bulk command signature */
1090 cmd[1] = 0x53; /* bulk command signature */
1091 cmd[2] = 0x42; /* bulk command signature */
1092 cmd[3] = 0x43; /* bulk command signature */
1093 cmd[14] = 6; /* command length */
1094
1095 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1096 cmd[19] = 0x2; /* eject disc */
1097
1098 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1099 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1100 cmd, 31, NULL, 2000);
1101 kfree(cmd);
1102 if (r)
1103 return r;
1104
1105 /* At this point, the device disconnects and reconnects with the real
1106 * ID numbers. */
1107
1108 usb_set_intfdata(intf, NULL);
1109 return 0;
1110}
1111
74553aed
DD		 1112int zd_usb_init_hw(struct zd_usb *usb)
1113{
1114 int r;
1115 struct zd_mac *mac = zd_usb_to_mac(usb);
1116
1117 dev_dbg_f(zd_usb_dev(usb), "\n");
1118
1119 r = upload_firmware(usb);
1120 if (r) {
1121 dev_err(zd_usb_dev(usb),
1122 "couldn't load firmware. Error number %d\n", r);
1123 return r;
1124 }
1125
1126 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1127 if (r) {
1128 dev_dbg_f(zd_usb_dev(usb),
1129 "couldn't reset configuration. Error number %d\n", r);
1130 return r;
1131 }
1132
459c51ad 1133 r = zd_mac_init_hw(mac->hw);
74553aed
DD		 1134 if (r) {
1135 dev_dbg_f(zd_usb_dev(usb),
1136 "couldn't initialize mac. Error number %d\n", r);
1137 return r;
1138 }
1139
1140 usb->initialized = 1;
1141 return 0;
1142}
1143
e85d0918
DD		 1144static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1145{
1146 int r;
1147 struct usb_device *udev = interface_to_usbdev(intf);
459c51ad
DD		 1148 struct zd_usb *usb;
1149 struct ieee80211_hw *hw = NULL;
e85d0918
DD		 1150
1151 print_id(udev);
1152
a1030e92
DD		 1153 if (id->driver_info & DEVICE_INSTALLER)
1154 return eject_installer(intf);
1155
e85d0918
DD		 1156 switch (udev->speed) {
1157 case USB_SPEED_LOW:
1158 case USB_SPEED_FULL:
1159 case USB_SPEED_HIGH:
1160 break;
1161 default:
1162 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1163 r = -ENODEV;
1164 goto error;
1165 }
1166
459c51ad
DD		 1167 r = usb_reset_device(udev);
1168 if (r) {
1169 dev_err(&intf->dev,
1170 "couldn't reset usb device. Error number %d\n", r);
1171 goto error;
1172 }
6e3632f6 1173
459c51ad
DD		 1174 hw = zd_mac_alloc_hw(intf);
1175 if (hw == NULL) {
e85d0918
DD		 1176 r = -ENOMEM;
1177 goto error;
1178 }
1179
459c51ad 1180 usb = &zd_hw_mac(hw)->chip.usb;
74553aed 1181 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
e85d0918 1182
459c51ad 1183 r = zd_mac_preinit_hw(hw);
e85d0918
DD		 1184 if (r) {
1185 dev_dbg_f(&intf->dev,
1186 "couldn't initialize mac. Error number %d\n", r);
1187 goto error;
1188 }
1189
459c51ad 1190 r = ieee80211_register_hw(hw);
e85d0918
DD		 1191 if (r) {
1192 dev_dbg_f(&intf->dev,
459c51ad 1193 "couldn't register device. Error number %d\n", r);
e85d0918
DD		 1194 goto error;
1195 }
1196
1197 dev_dbg_f(&intf->dev, "successful\n");
459c51ad 1198 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
e85d0918
DD		 1199 return 0;
1200error:
1201 usb_reset_device(interface_to_usbdev(intf));
459c51ad
DD		 1202 if (hw) {
1203 zd_mac_clear(zd_hw_mac(hw));
1204 ieee80211_free_hw(hw);
1205 }
e85d0918
DD		 1206 return r;
1207}
1208
1209static void disconnect(struct usb_interface *intf)
1210{
459c51ad 1211 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
e0579d57
MP		 1212 struct zd_mac *mac;
1213 struct zd_usb *usb;
e85d0918 1214
a1030e92
DD		 1215 /* Either something really bad happened, or we're just dealing with
1216 * a DEVICE_INSTALLER. */
459c51ad 1217 if (hw == NULL)
a1030e92
DD		 1218 return;
1219
459c51ad 1220 mac = zd_hw_mac(hw);
e0579d57
MP		 1221 usb = &mac->chip.usb;
1222
e85d0918
DD		 1223 dev_dbg_f(zd_usb_dev(usb), "\n");
1224
459c51ad 1225 ieee80211_unregister_hw(hw);
e85d0918
DD		 1226
1227 /* Just in case something has gone wrong! */
1228 zd_usb_disable_rx(usb);
1229 zd_usb_disable_int(usb);
1230
1231 /* If the disconnect has been caused by a removal of the
1232 * driver module, the reset allows reloading of the driver. If the
1233 * reset will not be executed here, the upload of the firmware in the
1234 * probe function caused by the reloading of the driver will fail.
1235 */
1236 usb_reset_device(interface_to_usbdev(intf));
1237
459c51ad
DD		 1238 zd_mac_clear(mac);
1239 ieee80211_free_hw(hw);
e85d0918
DD		 1240 dev_dbg(&intf->dev, "disconnected\n");
1241}
1242
1243static struct usb_driver driver = {
459c51ad 1244 .name = KBUILD_MODNAME,
e85d0918
DD		 1245 .id_table = usb_ids,
1246 .probe = probe,
1247 .disconnect = disconnect,
1248};
1249
bc5f06a8
UK		 1250struct workqueue_struct *zd_workqueue;
1251
e85d0918
DD		 1252static int __init usb_init(void)
1253{
1254 int r;
1255
741fec53 1256 pr_debug("%s usb_init()\n", driver.name);
e85d0918 1257
bc5f06a8
UK		 1258 zd_workqueue = create_singlethread_workqueue(driver.name);
1259 if (zd_workqueue == NULL) {
741fec53 1260 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
bc5f06a8
UK		 1261 return -ENOMEM;
1262 }
1263
e85d0918
DD		 1264 r = usb_register(&driver);
1265 if (r) {
192b775c 1266 destroy_workqueue(zd_workqueue);
741fec53
UK		 1267 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1268 driver.name, r);
e85d0918
DD		 1269 return r;
1270 }
1271
741fec53 1272 pr_debug("%s initialized\n", driver.name);
e85d0918
DD		 1273 return 0;
1274}
1275
1276static void __exit usb_exit(void)
1277{
741fec53 1278 pr_debug("%s usb_exit()\n", driver.name);
e85d0918 1279 usb_deregister(&driver);
bc5f06a8 1280 destroy_workqueue(zd_workqueue);
e85d0918
DD		 1281}
1282
1283module_init(usb_init);
1284module_exit(usb_exit);
1285
1286static int usb_int_regs_length(unsigned int count)
1287{
1288 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1289}
1290
1291static void prepare_read_regs_int(struct zd_usb *usb)
1292{
1293 struct zd_usb_interrupt *intr = &usb->intr;
1294
a68077de 1295 spin_lock_irq(&intr->lock);
e85d0918
DD		 1296 intr->read_regs_enabled = 1;
1297 INIT_COMPLETION(intr->read_regs.completion);
a68077de
UK		 1298 spin_unlock_irq(&intr->lock);
1299}
1300
1301static void disable_read_regs_int(struct zd_usb *usb)
1302{
1303 struct zd_usb_interrupt *intr = &usb->intr;
1304
1305 spin_lock_irq(&intr->lock);
1306 intr->read_regs_enabled = 0;
1307 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1308}
1309
1310static int get_results(struct zd_usb *usb, u16 *values,
1311 struct usb_req_read_regs *req, unsigned int count)
1312{
1313 int r;
1314 int i;
1315 struct zd_usb_interrupt *intr = &usb->intr;
1316 struct read_regs_int *rr = &intr->read_regs;
1317 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1318
a68077de 1319 spin_lock_irq(&intr->lock);
e85d0918
DD		 1320
1321 r = -EIO;
1322 /* The created block size seems to be larger than expected.
1323 * However results appear to be correct.
1324 */
1325 if (rr->length < usb_int_regs_length(count)) {
1326 dev_dbg_f(zd_usb_dev(usb),
1327 "error: actual length %d less than expected %d\n",
1328 rr->length, usb_int_regs_length(count));
1329 goto error_unlock;
1330 }
1331 if (rr->length > sizeof(rr->buffer)) {
1332 dev_dbg_f(zd_usb_dev(usb),
1333 "error: actual length %d exceeds buffer size %zu\n",
1334 rr->length, sizeof(rr->buffer));
1335 goto error_unlock;
1336 }
1337
1338 for (i = 0; i < count; i++) {
1339 struct reg_data *rd = &regs->regs[i];
1340 if (rd->addr != req->addr[i]) {
1341 dev_dbg_f(zd_usb_dev(usb),
1342 "rd[%d] addr %#06hx expected %#06hx\n", i,
1343 le16_to_cpu(rd->addr),
1344 le16_to_cpu(req->addr[i]));
1345 goto error_unlock;
1346 }
1347 values[i] = le16_to_cpu(rd->value);
1348 }
1349
1350 r = 0;
1351error_unlock:
a68077de 1352 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1353 return r;
1354}
1355
1356int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1357 const zd_addr_t *addresses, unsigned int count)
1358{
1359 int r;
1360 int i, req_len, actual_req_len;
1361 struct usb_device *udev;
1362 struct usb_req_read_regs *req = NULL;
1363 unsigned long timeout;
1364
1365 if (count < 1) {
1366 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1367 return -EINVAL;
1368 }
1369 if (count > USB_MAX_IOREAD16_COUNT) {
1370 dev_dbg_f(zd_usb_dev(usb),
1371 "error: count %u exceeds possible max %u\n",
1372 count, USB_MAX_IOREAD16_COUNT);
1373 return -EINVAL;
1374 }
1375 if (in_atomic()) {
1376 dev_dbg_f(zd_usb_dev(usb),
1377 "error: io in atomic context not supported\n");
1378 return -EWOULDBLOCK;
1379 }
1380 if (!usb_int_enabled(usb)) {
1381 dev_dbg_f(zd_usb_dev(usb),
1382 "error: usb interrupt not enabled\n");
1383 return -EWOULDBLOCK;
1384 }
1385
1386 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
35c3404e 1387 req = kmalloc(req_len, GFP_KERNEL);
e85d0918
DD		 1388 if (!req)
1389 return -ENOMEM;
1390 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1391 for (i = 0; i < count; i++)
0ce34bc8 1392 req->addr[i] = cpu_to_le16((u16)addresses[i]);
e85d0918
DD		 1393
1394 udev = zd_usb_to_usbdev(usb);
1395 prepare_read_regs_int(usb);
1396 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1397 req, req_len, &actual_req_len, 1000 /* ms */);
1398 if (r) {
1399 dev_dbg_f(zd_usb_dev(usb),
1400 "error in usb_bulk_msg(). Error number %d\n", r);
1401 goto error;
1402 }
1403 if (req_len != actual_req_len) {
1404 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1405 " req_len %d != actual_req_len %d\n",
1406 req_len, actual_req_len);
1407 r = -EIO;
1408 goto error;
1409 }
1410
1411 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1412 msecs_to_jiffies(1000));
1413 if (!timeout) {
1414 disable_read_regs_int(usb);
1415 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1416 r = -ETIMEDOUT;
1417 goto error;
1418 }
1419
1420 r = get_results(usb, values, req, count);
1421error:
1422 kfree(req);
1423 return r;
1424}
1425
1426int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1427 unsigned int count)
1428{
1429 int r;
1430 struct usb_device *udev;
1431 struct usb_req_write_regs *req = NULL;
1432 int i, req_len, actual_req_len;
1433
1434 if (count == 0)
1435 return 0;
1436 if (count > USB_MAX_IOWRITE16_COUNT) {
1437 dev_dbg_f(zd_usb_dev(usb),
1438 "error: count %u exceeds possible max %u\n",
1439 count, USB_MAX_IOWRITE16_COUNT);
1440 return -EINVAL;
1441 }
1442 if (in_atomic()) {
1443 dev_dbg_f(zd_usb_dev(usb),
1444 "error: io in atomic context not supported\n");
1445 return -EWOULDBLOCK;
1446 }
1447
1448 req_len = sizeof(struct usb_req_write_regs) +
1449 count * sizeof(struct reg_data);
35c3404e 1450 req = kmalloc(req_len, GFP_KERNEL);
e85d0918
DD		 1451 if (!req)
1452 return -ENOMEM;
1453
1454 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1455 for (i = 0; i < count; i++) {
1456 struct reg_data *rw = &req->reg_writes[i];
0ce34bc8 1457 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
e85d0918
DD		 1458 rw->value = cpu_to_le16(ioreqs[i].value);
1459 }
1460
1461 udev = zd_usb_to_usbdev(usb);
1462 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1463 req, req_len, &actual_req_len, 1000 /* ms */);
1464 if (r) {
1465 dev_dbg_f(zd_usb_dev(usb),
1466 "error in usb_bulk_msg(). Error number %d\n", r);
1467 goto error;
1468 }
1469 if (req_len != actual_req_len) {
1470 dev_dbg_f(zd_usb_dev(usb),
1471 "error in usb_bulk_msg()"
1472 " req_len %d != actual_req_len %d\n",
1473 req_len, actual_req_len);
1474 r = -EIO;
1475 goto error;
1476 }
1477
1478 /* FALL-THROUGH with r == 0 */
1479error:
1480 kfree(req);
1481 return r;
1482}
1483
1484int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1485{
1486 int r;
1487 struct usb_device *udev;
1488 struct usb_req_rfwrite *req = NULL;
1489 int i, req_len, actual_req_len;
1490 u16 bit_value_template;
1491
1492 if (in_atomic()) {
1493 dev_dbg_f(zd_usb_dev(usb),
1494 "error: io in atomic context not supported\n");
1495 return -EWOULDBLOCK;
1496 }
1497 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1498 dev_dbg_f(zd_usb_dev(usb),
1499 "error: bits %d are smaller than"
1500 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1501 bits, USB_MIN_RFWRITE_BIT_COUNT);
1502 return -EINVAL;
1503 }
1504 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1505 dev_dbg_f(zd_usb_dev(usb),
1506 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1507 bits, USB_MAX_RFWRITE_BIT_COUNT);
1508 return -EINVAL;
1509 }
1510#ifdef DEBUG
1511 if (value & (~0UL << bits)) {
1512 dev_dbg_f(zd_usb_dev(usb),
1513 "error: value %#09x has bits >= %d set\n",
1514 value, bits);
1515 return -EINVAL;
1516 }
1517#endif /* DEBUG */
1518
1519 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1520
1521 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1522 if (r) {
1523 dev_dbg_f(zd_usb_dev(usb),
1524 "error %d: Couldn't read CR203\n", r);
1525 goto out;
1526 }
1527 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1528
1529 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
35c3404e 1530 req = kmalloc(req_len, GFP_KERNEL);
e85d0918
DD		 1531 if (!req)
1532 return -ENOMEM;
1533
1534 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1535 /* 1: 3683a, but not used in ZYDAS driver */
1536 req->value = cpu_to_le16(2);
1537 req->bits = cpu_to_le16(bits);
1538
1539 for (i = 0; i < bits; i++) {
1540 u16 bv = bit_value_template;
1541 if (value & (1 << (bits-1-i)))
1542 bv |= RF_DATA;
1543 req->bit_values[i] = cpu_to_le16(bv);
1544 }
1545
1546 udev = zd_usb_to_usbdev(usb);
1547 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1548 req, req_len, &actual_req_len, 1000 /* ms */);
1549 if (r) {
1550 dev_dbg_f(zd_usb_dev(usb),
1551 "error in usb_bulk_msg(). Error number %d\n", r);
1552 goto out;
1553 }
1554 if (req_len != actual_req_len) {
1555 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1556 " req_len %d != actual_req_len %d\n",
1557 req_len, actual_req_len);
1558 r = -EIO;
1559 goto out;
1560 }
1561
1562 /* FALL-THROUGH with r == 0 */
1563out:
1564 kfree(req);
1565 return r;
1566}
Linux kernel - Deliverables
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