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ar9170usb: add Sphairon Homelink 1202 USB ID
[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
3e8b4d00
BH		 321MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur");
322MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur");
323MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub");
324MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub");
325MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr");
326MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr");
327
74553aed
DD		 328/* Read data from device address space using "firmware interface" which does
329 * not require firmware to be loaded. */
330int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
331{
332 int r;
333 struct usb_device *udev = zd_usb_to_usbdev(usb);
a8c4ea7a 334 u8 *buf;
74553aed 335
a8c4ea7a
AN		 336 /* Use "DMA-aware" buffer. */
337 buf = kmalloc(len, GFP_KERNEL);
338 if (!buf)
339 return -ENOMEM;
74553aed
DD		 340 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
341 USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
a8c4ea7a 342 buf, len, 5000);
74553aed
DD		 343 if (r < 0) {
344 dev_err(&udev->dev,
345 "read over firmware interface failed: %d\n", r);
a8c4ea7a 346 goto exit;
74553aed
DD		 347 } else if (r != len) {
348 dev_err(&udev->dev,
349 "incomplete read over firmware interface: %d/%d\n",
350 r, len);
a8c4ea7a
AN		 351 r = -EIO;
352 goto exit;
74553aed 353 }
a8c4ea7a
AN		 354 r = 0;
355 memcpy(data, buf, len);
356exit:
357 kfree(buf);
358 return r;
74553aed
DD		 359}
360
e85d0918
DD		 361#define urb_dev(urb) (&(urb)->dev->dev)
362
363static inline void handle_regs_int(struct urb *urb)
364{
365 struct zd_usb *usb = urb->context;
366 struct zd_usb_interrupt *intr = &usb->intr;
367 int len;
72e77a8a 368 u16 int_num;
e85d0918
DD		 369
370 ZD_ASSERT(in_interrupt());
371 spin_lock(&intr->lock);
372
d63ddcec 373 int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
72e77a8a
LCC		 374 if (int_num == CR_INTERRUPT) {
375 struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
376 memcpy(&mac->intr_buffer, urb->transfer_buffer,
377 USB_MAX_EP_INT_BUFFER);
378 schedule_work(&mac->process_intr);
379 } else if (intr->read_regs_enabled) {
e85d0918
DD		 380 intr->read_regs.length = len = urb->actual_length;
381
382 if (len > sizeof(intr->read_regs.buffer))
383 len = sizeof(intr->read_regs.buffer);
384 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
385 intr->read_regs_enabled = 0;
386 complete(&intr->read_regs.completion);
387 goto out;
388 }
389
e85d0918
DD		 390out:
391 spin_unlock(&intr->lock);
392}
393
7d12e780 394static void int_urb_complete(struct urb *urb)
e85d0918
DD		 395{
396 int r;
397 struct usb_int_header *hdr;
398
399 switch (urb->status) {
400 case 0:
401 break;
402 case -ESHUTDOWN:
403 case -EINVAL:
404 case -ENODEV:
405 case -ENOENT:
406 case -ECONNRESET:
e85d0918 407 case -EPIPE:
b312d799 408 goto kfree;
e85d0918
DD		 409 default:
410 goto resubmit;
411 }
412
413 if (urb->actual_length < sizeof(hdr)) {
414 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
415 goto resubmit;
416 }
417
418 hdr = urb->transfer_buffer;
419 if (hdr->type != USB_INT_TYPE) {
420 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
421 goto resubmit;
422 }
423
424 switch (hdr->id) {
425 case USB_INT_ID_REGS:
426 handle_regs_int(urb);
427 break;
428 case USB_INT_ID_RETRY_FAILED:
7f4013f0 429 zd_mac_tx_failed(urb);
e85d0918
DD		 430 break;
431 default:
432 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
433 (unsigned int)hdr->id);
434 goto resubmit;
435 }
436
437resubmit:
438 r = usb_submit_urb(urb, GFP_ATOMIC);
439 if (r) {
440 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
441 goto kfree;
442 }
443 return;
444kfree:
445 kfree(urb->transfer_buffer);
446}
447
448static inline int int_urb_interval(struct usb_device *udev)
449{
450 switch (udev->speed) {
451 case USB_SPEED_HIGH:
452 return 4;
453 case USB_SPEED_LOW:
454 return 10;
455 case USB_SPEED_FULL:
456 default:
457 return 1;
458 }
459}
460
461static inline int usb_int_enabled(struct zd_usb *usb)
462{
463 unsigned long flags;
464 struct zd_usb_interrupt *intr = &usb->intr;
465 struct urb *urb;
466
467 spin_lock_irqsave(&intr->lock, flags);
468 urb = intr->urb;
469 spin_unlock_irqrestore(&intr->lock, flags);
470 return urb != NULL;
471}
472
473int zd_usb_enable_int(struct zd_usb *usb)
474{
475 int r;
476 struct usb_device *udev;
477 struct zd_usb_interrupt *intr = &usb->intr;
478 void *transfer_buffer = NULL;
479 struct urb *urb;
480
481 dev_dbg_f(zd_usb_dev(usb), "\n");
482
35c3404e 483 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 484 if (!urb) {
485 r = -ENOMEM;
486 goto out;
487 }
488
489 ZD_ASSERT(!irqs_disabled());
490 spin_lock_irq(&intr->lock);
491 if (intr->urb) {
492 spin_unlock_irq(&intr->lock);
493 r = 0;
494 goto error_free_urb;
495 }
496 intr->urb = urb;
497 spin_unlock_irq(&intr->lock);
498
499 /* TODO: make it a DMA buffer */
500 r = -ENOMEM;
35c3404e 501 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL);
e85d0918
DD		 502 if (!transfer_buffer) {
503 dev_dbg_f(zd_usb_dev(usb),
504 "couldn't allocate transfer_buffer\n");
505 goto error_set_urb_null;
506 }
507
508 udev = zd_usb_to_usbdev(usb);
509 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
510 transfer_buffer, USB_MAX_EP_INT_BUFFER,
511 int_urb_complete, usb,
512 intr->interval);
513
514 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
35c3404e 515 r = usb_submit_urb(urb, GFP_KERNEL);
e85d0918
DD		 516 if (r) {
517 dev_dbg_f(zd_usb_dev(usb),
518 "Couldn't submit urb. Error number %d\n", r);
519 goto error;
520 }
521
522 return 0;
523error:
524 kfree(transfer_buffer);
525error_set_urb_null:
526 spin_lock_irq(&intr->lock);
527 intr->urb = NULL;
528 spin_unlock_irq(&intr->lock);
529error_free_urb:
530 usb_free_urb(urb);
531out:
532 return r;
533}
534
535void zd_usb_disable_int(struct zd_usb *usb)
536{
537 unsigned long flags;
538 struct zd_usb_interrupt *intr = &usb->intr;
539 struct urb *urb;
540
541 spin_lock_irqsave(&intr->lock, flags);
542 urb = intr->urb;
543 if (!urb) {
544 spin_unlock_irqrestore(&intr->lock, flags);
545 return;
546 }
547 intr->urb = NULL;
548 spin_unlock_irqrestore(&intr->lock, flags);
549
550 usb_kill_urb(urb);
551 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
552 usb_free_urb(urb);
553}
554
555static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
556 unsigned int length)
557{
558 int i;
e85d0918
DD		 559 const struct rx_length_info *length_info;
560
561 if (length < sizeof(struct rx_length_info)) {
562 /* It's not a complete packet anyhow. */
7f4013f0
BP		 563 printk("%s: invalid, small RX packet : %d\n",
564 __func__, length);
e85d0918
DD		 565 return;
566 }
567 length_info = (struct rx_length_info *)
568 (buffer + length - sizeof(struct rx_length_info));
569
570 /* It might be that three frames are merged into a single URB
571 * transaction. We have to check for the length info tag.
572 *
573 * While testing we discovered that length_info might be unaligned,
574 * because if USB transactions are merged, the last packet will not
575 * be padded. Unaligned access might also happen if the length_info
576 * structure is not present.
577 */
533dd1b0 578 if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
b269825b 579 {
e85d0918
DD		 580 unsigned int l, k, n;
581 for (i = 0, l = 0;; i++) {
533dd1b0 582 k = get_unaligned_le16(&length_info->length[i]);
850c211c
UK		 583 if (k == 0)
584 return;
e85d0918
DD		 585 n = l+k;
586 if (n > length)
587 return;
459c51ad 588 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
e85d0918
DD		 589 if (i >= 2)
590 return;
591 l = (n+3) & ~3;
592 }
593 } else {
459c51ad 594 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
e85d0918
DD		 595 }
596}
597
7d12e780 598static void rx_urb_complete(struct urb *urb)
e85d0918
DD		 599{
600 struct zd_usb *usb;
601 struct zd_usb_rx *rx;
602 const u8 *buffer;
603 unsigned int length;
604
605 switch (urb->status) {
606 case 0:
607 break;
608 case -ESHUTDOWN:
609 case -EINVAL:
610 case -ENODEV:
611 case -ENOENT:
612 case -ECONNRESET:
e85d0918 613 case -EPIPE:
b312d799 614 return;
e85d0918
DD		 615 default:
616 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
617 goto resubmit;
618 }
619
620 buffer = urb->transfer_buffer;
621 length = urb->actual_length;
622 usb = urb->context;
623 rx = &usb->rx;
624
625 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
626 /* If there is an old first fragment, we don't care. */
627 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
628 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
629 spin_lock(&rx->lock);
630 memcpy(rx->fragment, buffer, length);
631 rx->fragment_length = length;
632 spin_unlock(&rx->lock);
633 goto resubmit;
634 }
635
636 spin_lock(&rx->lock);
637 if (rx->fragment_length > 0) {
638 /* We are on a second fragment, we believe */
639 ZD_ASSERT(length + rx->fragment_length <=
640 ARRAY_SIZE(rx->fragment));
641 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
642 memcpy(rx->fragment+rx->fragment_length, buffer, length);
643 handle_rx_packet(usb, rx->fragment,
644 rx->fragment_length + length);
645 rx->fragment_length = 0;
646 spin_unlock(&rx->lock);
647 } else {
648 spin_unlock(&rx->lock);
649 handle_rx_packet(usb, buffer, length);
650 }
651
652resubmit:
653 usb_submit_urb(urb, GFP_ATOMIC);
654}
655
459c51ad 656static struct urb *alloc_rx_urb(struct zd_usb *usb)
e85d0918
DD		 657{
658 struct usb_device *udev = zd_usb_to_usbdev(usb);
659 struct urb *urb;
660 void *buffer;
661
35c3404e 662 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 663 if (!urb)
664 return NULL;
35c3404e 665 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
e85d0918
DD		 666 &urb->transfer_dma);
667 if (!buffer) {
668 usb_free_urb(urb);
669 return NULL;
670 }
671
672 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
673 buffer, USB_MAX_RX_SIZE,
674 rx_urb_complete, usb);
675 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
676
677 return urb;
678}
679
459c51ad 680static void free_rx_urb(struct urb *urb)
e85d0918
DD		 681{
682 if (!urb)
683 return;
684 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
685 urb->transfer_buffer, urb->transfer_dma);
686 usb_free_urb(urb);
687}
688
689int zd_usb_enable_rx(struct zd_usb *usb)
690{
691 int i, r;
692 struct zd_usb_rx *rx = &usb->rx;
693 struct urb **urbs;
694
695 dev_dbg_f(zd_usb_dev(usb), "\n");
696
697 r = -ENOMEM;
459c51ad 698 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
e85d0918
DD		 699 if (!urbs)
700 goto error;
459c51ad
DD		 701 for (i = 0; i < RX_URBS_COUNT; i++) {
702 urbs[i] = alloc_rx_urb(usb);
e85d0918
DD		 703 if (!urbs[i])
704 goto error;
705 }
706
707 ZD_ASSERT(!irqs_disabled());
708 spin_lock_irq(&rx->lock);
709 if (rx->urbs) {
710 spin_unlock_irq(&rx->lock);
711 r = 0;
712 goto error;
713 }
714 rx->urbs = urbs;
459c51ad 715 rx->urbs_count = RX_URBS_COUNT;
e85d0918
DD		 716 spin_unlock_irq(&rx->lock);
717
459c51ad 718 for (i = 0; i < RX_URBS_COUNT; i++) {
35c3404e 719 r = usb_submit_urb(urbs[i], GFP_KERNEL);
e85d0918
DD		 720 if (r)
721 goto error_submit;
722 }
723
724 return 0;
725error_submit:
459c51ad 726 for (i = 0; i < RX_URBS_COUNT; i++) {
e85d0918
DD		 727 usb_kill_urb(urbs[i]);
728 }
729 spin_lock_irq(&rx->lock);
730 rx->urbs = NULL;
731 rx->urbs_count = 0;
732 spin_unlock_irq(&rx->lock);
733error:
734 if (urbs) {
459c51ad
DD		 735 for (i = 0; i < RX_URBS_COUNT; i++)
736 free_rx_urb(urbs[i]);
e85d0918
DD		 737 }
738 return r;
739}
740
741void zd_usb_disable_rx(struct zd_usb *usb)
742{
743 int i;
744 unsigned long flags;
745 struct urb **urbs;
746 unsigned int count;
747 struct zd_usb_rx *rx = &usb->rx;
748
749 spin_lock_irqsave(&rx->lock, flags);
750 urbs = rx->urbs;
751 count = rx->urbs_count;
752 spin_unlock_irqrestore(&rx->lock, flags);
753 if (!urbs)
754 return;
755
756 for (i = 0; i < count; i++) {
757 usb_kill_urb(urbs[i]);
459c51ad 758 free_rx_urb(urbs[i]);
e85d0918
DD		 759 }
760 kfree(urbs);
761
762 spin_lock_irqsave(&rx->lock, flags);
763 rx->urbs = NULL;
764 rx->urbs_count = 0;
765 spin_unlock_irqrestore(&rx->lock, flags);
766}
767
459c51ad
DD		 768/**
769 * zd_usb_disable_tx - disable transmission
770 * @usb: the zd1211rw-private USB structure
771 *
772 * Frees all URBs in the free list and marks the transmission as disabled.
773 */
774void zd_usb_disable_tx(struct zd_usb *usb)
775{
776 struct zd_usb_tx *tx = &usb->tx;
777 unsigned long flags;
778 struct list_head *pos, *n;
779
780 spin_lock_irqsave(&tx->lock, flags);
781 list_for_each_safe(pos, n, &tx->free_urb_list) {
782 list_del(pos);
783 usb_free_urb(list_entry(pos, struct urb, urb_list));
784 }
785 tx->enabled = 0;
786 tx->submitted_urbs = 0;
787 /* The stopped state is ignored, relying on ieee80211_wake_queues()
788 * in a potentionally following zd_usb_enable_tx().
789 */
790 spin_unlock_irqrestore(&tx->lock, flags);
791}
792
793/**
794 * zd_usb_enable_tx - enables transmission
795 * @usb: a &struct zd_usb pointer
796 *
797 * This function enables transmission and prepares the &zd_usb_tx data
798 * structure.
799 */
800void zd_usb_enable_tx(struct zd_usb *usb)
801{
802 unsigned long flags;
803 struct zd_usb_tx *tx = &usb->tx;
804
805 spin_lock_irqsave(&tx->lock, flags);
806 tx->enabled = 1;
807 tx->submitted_urbs = 0;
808 ieee80211_wake_queues(zd_usb_to_hw(usb));
809 tx->stopped = 0;
810 spin_unlock_irqrestore(&tx->lock, flags);
811}
812
813/**
814 * alloc_tx_urb - provides an tx URB
815 * @usb: a &struct zd_usb pointer
816 *
817 * Allocates a new URB. If possible takes the urb from the free list in
818 * usb->tx.
819 */
820static struct urb *alloc_tx_urb(struct zd_usb *usb)
821{
822 struct zd_usb_tx *tx = &usb->tx;
823 unsigned long flags;
824 struct list_head *entry;
825 struct urb *urb;
826
827 spin_lock_irqsave(&tx->lock, flags);
828 if (list_empty(&tx->free_urb_list)) {
829 urb = usb_alloc_urb(0, GFP_ATOMIC);
830 goto out;
831 }
832 entry = tx->free_urb_list.next;
833 list_del(entry);
834 urb = list_entry(entry, struct urb, urb_list);
835out:
836 spin_unlock_irqrestore(&tx->lock, flags);
837 return urb;
838}
839
840/**
841 * free_tx_urb - frees a used tx URB
842 * @usb: a &struct zd_usb pointer
843 * @urb: URB to be freed
844 *
845 * Frees the the transmission URB, which means to put it on the free URB
846 * list.
847 */
848static void free_tx_urb(struct zd_usb *usb, struct urb *urb)
849{
850 struct zd_usb_tx *tx = &usb->tx;
851 unsigned long flags;
852
853 spin_lock_irqsave(&tx->lock, flags);
854 if (!tx->enabled) {
855 usb_free_urb(urb);
856 goto out;
857 }
858 list_add(&urb->urb_list, &tx->free_urb_list);
859out:
860 spin_unlock_irqrestore(&tx->lock, flags);
861}
862
863static void tx_dec_submitted_urbs(struct zd_usb *usb)
864{
865 struct zd_usb_tx *tx = &usb->tx;
866 unsigned long flags;
867
868 spin_lock_irqsave(&tx->lock, flags);
869 --tx->submitted_urbs;
870 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
871 ieee80211_wake_queues(zd_usb_to_hw(usb));
872 tx->stopped = 0;
873 }
874 spin_unlock_irqrestore(&tx->lock, flags);
875}
876
877static void tx_inc_submitted_urbs(struct zd_usb *usb)
878{
879 struct zd_usb_tx *tx = &usb->tx;
880 unsigned long flags;
881
882 spin_lock_irqsave(&tx->lock, flags);
883 ++tx->submitted_urbs;
884 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
885 ieee80211_stop_queues(zd_usb_to_hw(usb));
886 tx->stopped = 1;
887 }
888 spin_unlock_irqrestore(&tx->lock, flags);
889}
890
891/**
892 * tx_urb_complete - completes the execution of an URB
893 * @urb: a URB
894 *
895 * This function is called if the URB has been transferred to a device or an
896 * error has happened.
897 */
7d12e780 898static void tx_urb_complete(struct urb *urb)
e85d0918
DD		 899{
900 int r;
459c51ad 901 struct sk_buff *skb;
e039fa4a 902 struct ieee80211_tx_info *info;
459c51ad 903 struct zd_usb *usb;
e85d0918
DD		 904
905 switch (urb->status) {
906 case 0:
907 break;
908 case -ESHUTDOWN:
909 case -EINVAL:
910 case -ENODEV:
911 case -ENOENT:
912 case -ECONNRESET:
b312d799 913 case -EPIPE:
e85d0918
DD		 914 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
915 break;
e85d0918
DD		 916 default:
917 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
918 goto resubmit;
919 }
920free_urb:
459c51ad 921 skb = (struct sk_buff *)urb->context;
dbabad0c
JB		 922 /*
923 * grab 'usb' pointer before handing off the skb (since
924 * it might be freed by zd_mac_tx_to_dev or mac80211)
925 */
e039fa4a 926 info = IEEE80211_SKB_CB(skb);
e6a9854b 927 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
dbabad0c 928 zd_mac_tx_to_dev(skb, urb->status);
459c51ad
DD		 929 free_tx_urb(usb, urb);
930 tx_dec_submitted_urbs(usb);
e85d0918
DD		 931 return;
932resubmit:
933 r = usb_submit_urb(urb, GFP_ATOMIC);
934 if (r) {
935 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
936 goto free_urb;
937 }
938}
939
459c51ad
DD		 940/**
941 * zd_usb_tx: initiates transfer of a frame of the device
942 *
943 * @usb: the zd1211rw-private USB structure
944 * @skb: a &struct sk_buff pointer
945 *
946 * This function tranmits a frame to the device. It doesn't wait for
947 * completion. The frame must contain the control set and have all the
948 * control set information available.
949 *
950 * The function returns 0 if the transfer has been successfully initiated.
e85d0918 951 */
459c51ad 952int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
e85d0918
DD		 953{
954 int r;
955 struct usb_device *udev = zd_usb_to_usbdev(usb);
956 struct urb *urb;
e85d0918 957
459c51ad 958 urb = alloc_tx_urb(usb);
e85d0918
DD		 959 if (!urb) {
960 r = -ENOMEM;
961 goto out;
962 }
963
e85d0918 964 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
459c51ad 965 skb->data, skb->len, tx_urb_complete, skb);
e85d0918
DD		 966
967 r = usb_submit_urb(urb, GFP_ATOMIC);
968 if (r)
969 goto error;
459c51ad 970 tx_inc_submitted_urbs(usb);
e85d0918
DD		 971 return 0;
972error:
459c51ad 973 free_tx_urb(usb, urb);
e85d0918
DD		 974out:
975 return r;
976}
977
978static inline void init_usb_interrupt(struct zd_usb *usb)
979{
980 struct zd_usb_interrupt *intr = &usb->intr;
981
982 spin_lock_init(&intr->lock);
983 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
984 init_completion(&intr->read_regs.completion);
0ce34bc8 985 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
e85d0918
DD		 986}
987
988static inline void init_usb_rx(struct zd_usb *usb)
989{
990 struct zd_usb_rx *rx = &usb->rx;
991 spin_lock_init(&rx->lock);
992 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
993 rx->usb_packet_size = 512;
994 } else {
995 rx->usb_packet_size = 64;
996 }
997 ZD_ASSERT(rx->fragment_length == 0);
998}
999
1000static inline void init_usb_tx(struct zd_usb *usb)
1001{
459c51ad
DD		 1002 struct zd_usb_tx *tx = &usb->tx;
1003 spin_lock_init(&tx->lock);
1004 tx->enabled = 0;
1005 tx->stopped = 0;
1006 INIT_LIST_HEAD(&tx->free_urb_list);
1007 tx->submitted_urbs = 0;
e85d0918
DD		 1008}
1009
459c51ad 1010void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
e85d0918
DD		 1011 struct usb_interface *intf)
1012{
1013 memset(usb, 0, sizeof(*usb));
1014 usb->intf = usb_get_intf(intf);
459c51ad 1015 usb_set_intfdata(usb->intf, hw);
e85d0918
DD		 1016 init_usb_interrupt(usb);
1017 init_usb_tx(usb);
1018 init_usb_rx(usb);
1019}
1020
e85d0918
DD		 1021void zd_usb_clear(struct zd_usb *usb)
1022{
1023 usb_set_intfdata(usb->intf, NULL);
1024 usb_put_intf(usb->intf);
c48cf125 1025 ZD_MEMCLEAR(usb, sizeof(*usb));
e85d0918
DD		 1026 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1027}
1028
1029static const char *speed(enum usb_device_speed speed)
1030{
1031 switch (speed) {
1032 case USB_SPEED_LOW:
1033 return "low";
1034 case USB_SPEED_FULL:
1035 return "full";
1036 case USB_SPEED_HIGH:
1037 return "high";
1038 default:
1039 return "unknown speed";
1040 }
1041}
1042
1043static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1044{
1045 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1046 le16_to_cpu(udev->descriptor.idVendor),
1047 le16_to_cpu(udev->descriptor.idProduct),
1048 get_bcdDevice(udev),
1049 speed(udev->speed));
1050}
1051
1052int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1053{
1054 struct usb_device *udev = interface_to_usbdev(usb->intf);
1055 return scnprint_id(udev, buffer, size);
1056}
1057
1058#ifdef DEBUG
1059static void print_id(struct usb_device *udev)
1060{
1061 char buffer[40];
1062
1063 scnprint_id(udev, buffer, sizeof(buffer));
1064 buffer[sizeof(buffer)-1] = 0;
1065 dev_dbg_f(&udev->dev, "%s\n", buffer);
1066}
1067#else
1068#define print_id(udev) do { } while (0)
1069#endif
1070
a1030e92
DD		 1071static int eject_installer(struct usb_interface *intf)
1072{
1073 struct usb_device *udev = interface_to_usbdev(intf);
1074 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1075 struct usb_endpoint_descriptor *endpoint;
1076 unsigned char *cmd;
1077 u8 bulk_out_ep;
1078 int r;
1079
1080 /* Find bulk out endpoint */
1081 endpoint = &iface_desc->endpoint[1].desc;
33e2fb2f 1082 if (usb_endpoint_dir_out(endpoint) &&
f201a8a4 1083 usb_endpoint_xfer_bulk(endpoint)) {
a1030e92
DD		 1084 bulk_out_ep = endpoint->bEndpointAddress;
1085 } else {
1086 dev_err(&udev->dev,
1087 "zd1211rw: Could not find bulk out endpoint\n");
1088 return -ENODEV;
1089 }
1090
1091 cmd = kzalloc(31, GFP_KERNEL);
1092 if (cmd == NULL)
1093 return -ENODEV;
1094
1095 /* USB bulk command block */
1096 cmd[0] = 0x55; /* bulk command signature */
1097 cmd[1] = 0x53; /* bulk command signature */
1098 cmd[2] = 0x42; /* bulk command signature */
1099 cmd[3] = 0x43; /* bulk command signature */
1100 cmd[14] = 6; /* command length */
1101
1102 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1103 cmd[19] = 0x2; /* eject disc */
1104
1105 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1106 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1107 cmd, 31, NULL, 2000);
1108 kfree(cmd);
1109 if (r)
1110 return r;
1111
1112 /* At this point, the device disconnects and reconnects with the real
1113 * ID numbers. */
1114
1115 usb_set_intfdata(intf, NULL);
1116 return 0;
1117}
1118
74553aed
DD		 1119int zd_usb_init_hw(struct zd_usb *usb)
1120{
1121 int r;
1122 struct zd_mac *mac = zd_usb_to_mac(usb);
1123
1124 dev_dbg_f(zd_usb_dev(usb), "\n");
1125
1126 r = upload_firmware(usb);
1127 if (r) {
1128 dev_err(zd_usb_dev(usb),
1129 "couldn't load firmware. Error number %d\n", r);
1130 return r;
1131 }
1132
1133 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1134 if (r) {
1135 dev_dbg_f(zd_usb_dev(usb),
1136 "couldn't reset configuration. Error number %d\n", r);
1137 return r;
1138 }
1139
459c51ad 1140 r = zd_mac_init_hw(mac->hw);
74553aed
DD		 1141 if (r) {
1142 dev_dbg_f(zd_usb_dev(usb),
1143 "couldn't initialize mac. Error number %d\n", r);
1144 return r;
1145 }
1146
1147 usb->initialized = 1;
1148 return 0;
1149}
1150
e85d0918
DD		 1151static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1152{
1153 int r;
1154 struct usb_device *udev = interface_to_usbdev(intf);
459c51ad
DD		 1155 struct zd_usb *usb;
1156 struct ieee80211_hw *hw = NULL;
e85d0918
DD		 1157
1158 print_id(udev);
1159
a1030e92
DD		 1160 if (id->driver_info & DEVICE_INSTALLER)
1161 return eject_installer(intf);
1162
e85d0918
DD		 1163 switch (udev->speed) {
1164 case USB_SPEED_LOW:
1165 case USB_SPEED_FULL:
1166 case USB_SPEED_HIGH:
1167 break;
1168 default:
1169 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1170 r = -ENODEV;
1171 goto error;
1172 }
1173
459c51ad
DD		 1174 r = usb_reset_device(udev);
1175 if (r) {
1176 dev_err(&intf->dev,
1177 "couldn't reset usb device. Error number %d\n", r);
1178 goto error;
1179 }
6e3632f6 1180
459c51ad
DD		 1181 hw = zd_mac_alloc_hw(intf);
1182 if (hw == NULL) {
e85d0918
DD		 1183 r = -ENOMEM;
1184 goto error;
1185 }
1186
459c51ad 1187 usb = &zd_hw_mac(hw)->chip.usb;
74553aed 1188 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
e85d0918 1189
459c51ad 1190 r = zd_mac_preinit_hw(hw);
e85d0918
DD		 1191 if (r) {
1192 dev_dbg_f(&intf->dev,
1193 "couldn't initialize mac. Error number %d\n", r);
1194 goto error;
1195 }
1196
459c51ad 1197 r = ieee80211_register_hw(hw);
e85d0918
DD		 1198 if (r) {
1199 dev_dbg_f(&intf->dev,
459c51ad 1200 "couldn't register device. Error number %d\n", r);
e85d0918
DD		 1201 goto error;
1202 }
1203
1204 dev_dbg_f(&intf->dev, "successful\n");
459c51ad 1205 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
e85d0918
DD		 1206 return 0;
1207error:
1208 usb_reset_device(interface_to_usbdev(intf));
459c51ad
DD		 1209 if (hw) {
1210 zd_mac_clear(zd_hw_mac(hw));
1211 ieee80211_free_hw(hw);
1212 }
e85d0918
DD		 1213 return r;
1214}
1215
1216static void disconnect(struct usb_interface *intf)
1217{
459c51ad 1218 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
e0579d57
MP		 1219 struct zd_mac *mac;
1220 struct zd_usb *usb;
e85d0918 1221
a1030e92
DD		 1222 /* Either something really bad happened, or we're just dealing with
1223 * a DEVICE_INSTALLER. */
459c51ad 1224 if (hw == NULL)
a1030e92
DD		 1225 return;
1226
459c51ad 1227 mac = zd_hw_mac(hw);
e0579d57
MP		 1228 usb = &mac->chip.usb;
1229
e85d0918
DD		 1230 dev_dbg_f(zd_usb_dev(usb), "\n");
1231
459c51ad 1232 ieee80211_unregister_hw(hw);
e85d0918
DD		 1233
1234 /* Just in case something has gone wrong! */
1235 zd_usb_disable_rx(usb);
1236 zd_usb_disable_int(usb);
1237
1238 /* If the disconnect has been caused by a removal of the
1239 * driver module, the reset allows reloading of the driver. If the
1240 * reset will not be executed here, the upload of the firmware in the
1241 * probe function caused by the reloading of the driver will fail.
1242 */
1243 usb_reset_device(interface_to_usbdev(intf));
1244
459c51ad
DD		 1245 zd_mac_clear(mac);
1246 ieee80211_free_hw(hw);
e85d0918
DD		 1247 dev_dbg(&intf->dev, "disconnected\n");
1248}
1249
1250static struct usb_driver driver = {
459c51ad 1251 .name = KBUILD_MODNAME,
e85d0918
DD		 1252 .id_table = usb_ids,
1253 .probe = probe,
1254 .disconnect = disconnect,
1255};
1256
bc5f06a8
UK		 1257struct workqueue_struct *zd_workqueue;
1258
e85d0918
DD		 1259static int __init usb_init(void)
1260{
1261 int r;
1262
741fec53 1263 pr_debug("%s usb_init()\n", driver.name);
e85d0918 1264
bc5f06a8
UK		 1265 zd_workqueue = create_singlethread_workqueue(driver.name);
1266 if (zd_workqueue == NULL) {
741fec53 1267 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
bc5f06a8
UK		 1268 return -ENOMEM;
1269 }
1270
e85d0918
DD		 1271 r = usb_register(&driver);
1272 if (r) {
192b775c 1273 destroy_workqueue(zd_workqueue);
741fec53
UK		 1274 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1275 driver.name, r);
e85d0918
DD		 1276 return r;
1277 }
1278
741fec53 1279 pr_debug("%s initialized\n", driver.name);
e85d0918
DD		 1280 return 0;
1281}
1282
1283static void __exit usb_exit(void)
1284{
741fec53 1285 pr_debug("%s usb_exit()\n", driver.name);
e85d0918 1286 usb_deregister(&driver);
bc5f06a8 1287 destroy_workqueue(zd_workqueue);
e85d0918
DD		 1288}
1289
1290module_init(usb_init);
1291module_exit(usb_exit);
1292
1293static int usb_int_regs_length(unsigned int count)
1294{
1295 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1296}
1297
1298static void prepare_read_regs_int(struct zd_usb *usb)
1299{
1300 struct zd_usb_interrupt *intr = &usb->intr;
1301
a68077de 1302 spin_lock_irq(&intr->lock);
e85d0918
DD		 1303 intr->read_regs_enabled = 1;
1304 INIT_COMPLETION(intr->read_regs.completion);
a68077de
UK		 1305 spin_unlock_irq(&intr->lock);
1306}
1307
1308static void disable_read_regs_int(struct zd_usb *usb)
1309{
1310 struct zd_usb_interrupt *intr = &usb->intr;
1311
1312 spin_lock_irq(&intr->lock);
1313 intr->read_regs_enabled = 0;
1314 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1315}
1316
1317static int get_results(struct zd_usb *usb, u16 *values,
1318 struct usb_req_read_regs *req, unsigned int count)
1319{
1320 int r;
1321 int i;
1322 struct zd_usb_interrupt *intr = &usb->intr;
1323 struct read_regs_int *rr = &intr->read_regs;
1324 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1325
a68077de 1326 spin_lock_irq(&intr->lock);
e85d0918
DD		 1327
1328 r = -EIO;
1329 /* The created block size seems to be larger than expected.
1330 * However results appear to be correct.
1331 */
1332 if (rr->length < usb_int_regs_length(count)) {
1333 dev_dbg_f(zd_usb_dev(usb),
1334 "error: actual length %d less than expected %d\n",
1335 rr->length, usb_int_regs_length(count));
1336 goto error_unlock;
1337 }
1338 if (rr->length > sizeof(rr->buffer)) {
1339 dev_dbg_f(zd_usb_dev(usb),
1340 "error: actual length %d exceeds buffer size %zu\n",
1341 rr->length, sizeof(rr->buffer));
1342 goto error_unlock;
1343 }
1344
1345 for (i = 0; i < count; i++) {
1346 struct reg_data *rd = &regs->regs[i];
1347 if (rd->addr != req->addr[i]) {
1348 dev_dbg_f(zd_usb_dev(usb),
1349 "rd[%d] addr %#06hx expected %#06hx\n", i,
1350 le16_to_cpu(rd->addr),
1351 le16_to_cpu(req->addr[i]));
1352 goto error_unlock;
1353 }
1354 values[i] = le16_to_cpu(rd->value);
1355 }
1356
1357 r = 0;
1358error_unlock:
a68077de 1359 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1360 return r;
1361}
1362
1363int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1364 const zd_addr_t *addresses, unsigned int count)
1365{
1366 int r;
1367 int i, req_len, actual_req_len;
1368 struct usb_device *udev;
1369 struct usb_req_read_regs *req = NULL;
1370 unsigned long timeout;
1371
1372 if (count < 1) {
1373 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1374 return -EINVAL;
1375 }
1376 if (count > USB_MAX_IOREAD16_COUNT) {
1377 dev_dbg_f(zd_usb_dev(usb),
1378 "error: count %u exceeds possible max %u\n",
1379 count, USB_MAX_IOREAD16_COUNT);
1380 return -EINVAL;
1381 }
1382 if (in_atomic()) {
1383 dev_dbg_f(zd_usb_dev(usb),
1384 "error: io in atomic context not supported\n");
1385 return -EWOULDBLOCK;
1386 }
1387 if (!usb_int_enabled(usb)) {
1388 dev_dbg_f(zd_usb_dev(usb),
1389 "error: usb interrupt not enabled\n");
1390 return -EWOULDBLOCK;
1391 }
1392
1393 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
35c3404e 1394 req = kmalloc(req_len, GFP_KERNEL);
e85d0918
DD		 1395 if (!req)
1396 return -ENOMEM;
1397 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1398 for (i = 0; i < count; i++)
0ce34bc8 1399 req->addr[i] = cpu_to_le16((u16)addresses[i]);
e85d0918
DD		 1400
1401 udev = zd_usb_to_usbdev(usb);
1402 prepare_read_regs_int(usb);
1403 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1404 req, req_len, &actual_req_len, 1000 /* ms */);
1405 if (r) {
1406 dev_dbg_f(zd_usb_dev(usb),
1407 "error in usb_bulk_msg(). Error number %d\n", r);
1408 goto error;
1409 }
1410 if (req_len != actual_req_len) {
1411 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1412 " req_len %d != actual_req_len %d\n",
1413 req_len, actual_req_len);
1414 r = -EIO;
1415 goto error;
1416 }
1417
1418 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1419 msecs_to_jiffies(1000));
1420 if (!timeout) {
1421 disable_read_regs_int(usb);
1422 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1423 r = -ETIMEDOUT;
1424 goto error;
1425 }
1426
1427 r = get_results(usb, values, req, count);
1428error:
1429 kfree(req);
1430 return r;
1431}
1432
1433int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1434 unsigned int count)
1435{
1436 int r;
1437 struct usb_device *udev;
1438 struct usb_req_write_regs *req = NULL;
1439 int i, req_len, actual_req_len;
1440
1441 if (count == 0)
1442 return 0;
1443 if (count > USB_MAX_IOWRITE16_COUNT) {
1444 dev_dbg_f(zd_usb_dev(usb),
1445 "error: count %u exceeds possible max %u\n",
1446 count, USB_MAX_IOWRITE16_COUNT);
1447 return -EINVAL;
1448 }
1449 if (in_atomic()) {
1450 dev_dbg_f(zd_usb_dev(usb),
1451 "error: io in atomic context not supported\n");
1452 return -EWOULDBLOCK;
1453 }
1454
1455 req_len = sizeof(struct usb_req_write_regs) +
1456 count * sizeof(struct reg_data);
35c3404e 1457 req = kmalloc(req_len, GFP_KERNEL);
e85d0918
DD		 1458 if (!req)
1459 return -ENOMEM;
1460
1461 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1462 for (i = 0; i < count; i++) {
1463 struct reg_data *rw = &req->reg_writes[i];
0ce34bc8 1464 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
e85d0918
DD		 1465 rw->value = cpu_to_le16(ioreqs[i].value);
1466 }
1467
1468 udev = zd_usb_to_usbdev(usb);
1469 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1470 req, req_len, &actual_req_len, 1000 /* ms */);
1471 if (r) {
1472 dev_dbg_f(zd_usb_dev(usb),
1473 "error in usb_bulk_msg(). Error number %d\n", r);
1474 goto error;
1475 }
1476 if (req_len != actual_req_len) {
1477 dev_dbg_f(zd_usb_dev(usb),
1478 "error in usb_bulk_msg()"
1479 " req_len %d != actual_req_len %d\n",
1480 req_len, actual_req_len);
1481 r = -EIO;
1482 goto error;
1483 }
1484
1485 /* FALL-THROUGH with r == 0 */
1486error:
1487 kfree(req);
1488 return r;
1489}
1490
1491int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1492{
1493 int r;
1494 struct usb_device *udev;
1495 struct usb_req_rfwrite *req = NULL;
1496 int i, req_len, actual_req_len;
1497 u16 bit_value_template;
1498
1499 if (in_atomic()) {
1500 dev_dbg_f(zd_usb_dev(usb),
1501 "error: io in atomic context not supported\n");
1502 return -EWOULDBLOCK;
1503 }
1504 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1505 dev_dbg_f(zd_usb_dev(usb),
1506 "error: bits %d are smaller than"
1507 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1508 bits, USB_MIN_RFWRITE_BIT_COUNT);
1509 return -EINVAL;
1510 }
1511 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1512 dev_dbg_f(zd_usb_dev(usb),
1513 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1514 bits, USB_MAX_RFWRITE_BIT_COUNT);
1515 return -EINVAL;
1516 }
1517#ifdef DEBUG
1518 if (value & (~0UL << bits)) {
1519 dev_dbg_f(zd_usb_dev(usb),
1520 "error: value %#09x has bits >= %d set\n",
1521 value, bits);
1522 return -EINVAL;
1523 }
1524#endif /* DEBUG */
1525
1526 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1527
1528 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1529 if (r) {
1530 dev_dbg_f(zd_usb_dev(usb),
1531 "error %d: Couldn't read CR203\n", r);
1532 goto out;
1533 }
1534 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1535
1536 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
35c3404e 1537 req = kmalloc(req_len, GFP_KERNEL);
e85d0918
DD		 1538 if (!req)
1539 return -ENOMEM;
1540
1541 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1542 /* 1: 3683a, but not used in ZYDAS driver */
1543 req->value = cpu_to_le16(2);
1544 req->bits = cpu_to_le16(bits);
1545
1546 for (i = 0; i < bits; i++) {
1547 u16 bv = bit_value_template;
1548 if (value & (1 << (bits-1-i)))
1549 bv |= RF_DATA;
1550 req->bit_values[i] = cpu_to_le16(bv);
1551 }
1552
1553 udev = zd_usb_to_usbdev(usb);
1554 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1555 req, req_len, &actual_req_len, 1000 /* ms */);
1556 if (r) {
1557 dev_dbg_f(zd_usb_dev(usb),
1558 "error in usb_bulk_msg(). Error number %d\n", r);
1559 goto out;
1560 }
1561 if (req_len != actual_req_len) {
1562 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1563 " req_len %d != actual_req_len %d\n",
1564 req_len, actual_req_len);
1565 r = -EIO;
1566 goto out;
1567 }
1568
1569 /* FALL-THROUGH with r == 0 */
1570out:
1571 kfree(req);
1572 return r;
1573}
Linux kernel - Deliverables
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