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[PATCH] zd1211rw: USB id 1582:6003 for Longshine 8131G3 added
[deliverable/linux.git] / drivers / net / wireless / zd1211rw / zd_usb.c
CommitLineData
e85d0918
DD		 1/* zd_usb.c
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17
18#include <asm/unaligned.h>
d066c219 19#include <linux/kernel.h>
e85d0918
DD		 20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/firmware.h>
23#include <linux/device.h>
24#include <linux/errno.h>
25#include <linux/skbuff.h>
26#include <linux/usb.h>
27#include <net/ieee80211.h>
28
29#include "zd_def.h"
30#include "zd_netdev.h"
31#include "zd_mac.h"
32#include "zd_usb.h"
33#include "zd_util.h"
34
35static struct usb_device_id usb_ids[] = {
36 /* ZD1211 */
37 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
38 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
39 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
40 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
dd2f5538 43 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
1b865491 44 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
12f39308 45 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
4ceb7e99 46 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
e85d0918
DD		 47 /* ZD1211B */
48 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
49 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
dd2f5538 50 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
943599ee 51 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
a1030e92
DD		 52 /* "Driverless" devices that need ejecting */
53 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
e85d0918
DD		 54 {}
55};
56
57MODULE_LICENSE("GPL");
58MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
59MODULE_AUTHOR("Ulrich Kunitz");
60MODULE_AUTHOR("Daniel Drake");
61MODULE_VERSION("1.0");
62MODULE_DEVICE_TABLE(usb, usb_ids);
63
64#define FW_ZD1211_PREFIX "zd1211/zd1211_"
65#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
66
67/* register address handling */
68
69#ifdef DEBUG
70static int check_addr(struct zd_usb *usb, zd_addr_t addr)
71{
72 u32 base = ZD_ADDR_BASE(addr);
73 u32 offset = ZD_OFFSET(addr);
74
75 if ((u32)addr & ADDR_ZERO_MASK)
76 goto invalid_address;
77 switch (base) {
78 case USB_BASE:
79 break;
80 case CR_BASE:
81 if (offset > CR_MAX_OFFSET) {
82 dev_dbg(zd_usb_dev(usb),
83 "CR offset %#010x larger than"
84 " CR_MAX_OFFSET %#10x\n",
85 offset, CR_MAX_OFFSET);
86 goto invalid_address;
87 }
88 if (offset & 1) {
89 dev_dbg(zd_usb_dev(usb),
90 "CR offset %#010x is not a multiple of 2\n",
91 offset);
92 goto invalid_address;
93 }
94 break;
95 case E2P_BASE:
96 if (offset > E2P_MAX_OFFSET) {
97 dev_dbg(zd_usb_dev(usb),
98 "E2P offset %#010x larger than"
99 " E2P_MAX_OFFSET %#010x\n",
100 offset, E2P_MAX_OFFSET);
101 goto invalid_address;
102 }
103 break;
104 case FW_BASE:
105 if (!usb->fw_base_offset) {
106 dev_dbg(zd_usb_dev(usb),
107 "ERROR: fw base offset has not been set\n");
108 return -EAGAIN;
109 }
110 if (offset > FW_MAX_OFFSET) {
111 dev_dbg(zd_usb_dev(usb),
112 "FW offset %#10x is larger than"
113 " FW_MAX_OFFSET %#010x\n",
114 offset, FW_MAX_OFFSET);
115 goto invalid_address;
116 }
117 break;
118 default:
119 dev_dbg(zd_usb_dev(usb),
120 "address has unsupported base %#010x\n", addr);
121 goto invalid_address;
122 }
123
124 return 0;
125invalid_address:
126 dev_dbg(zd_usb_dev(usb),
127 "ERROR: invalid address: %#010x\n", addr);
128 return -EINVAL;
129}
130#endif /* DEBUG */
131
132static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
133{
134 u32 base;
135 u16 offset;
136
137 base = ZD_ADDR_BASE(addr);
138 offset = ZD_OFFSET(addr);
139
140 ZD_ASSERT(check_addr(usb, addr) == 0);
141
142 switch (base) {
143 case CR_BASE:
144 offset += CR_BASE_OFFSET;
145 break;
146 case E2P_BASE:
147 offset += E2P_BASE_OFFSET;
148 break;
149 case FW_BASE:
150 offset += usb->fw_base_offset;
151 break;
152 }
153
154 return offset;
155}
156
157/* USB device initialization */
158
159static int request_fw_file(
160 const struct firmware **fw, const char *name, struct device *device)
161{
162 int r;
163
164 dev_dbg_f(device, "fw name %s\n", name);
165
166 r = request_firmware(fw, name, device);
167 if (r)
168 dev_err(device,
169 "Could not load firmware file %s. Error number %d\n",
170 name, r);
171 return r;
172}
173
174static inline u16 get_bcdDevice(const struct usb_device *udev)
175{
176 return le16_to_cpu(udev->descriptor.bcdDevice);
177}
178
179enum upload_code_flags {
180 REBOOT = 1,
181};
182
183/* Ensures that MAX_TRANSFER_SIZE is even. */
184#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
185
186static int upload_code(struct usb_device *udev,
187 const u8 *data, size_t size, u16 code_offset, int flags)
188{
189 u8 *p;
190 int r;
191
192 /* USB request blocks need "kmalloced" buffers.
193 */
194 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
195 if (!p) {
196 dev_err(&udev->dev, "out of memory\n");
197 r = -ENOMEM;
198 goto error;
199 }
200
201 size &= ~1;
202 while (size > 0) {
203 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
204 size : MAX_TRANSFER_SIZE;
205
206 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
207
208 memcpy(p, data, transfer_size);
209 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
210 USB_REQ_FIRMWARE_DOWNLOAD,
211 USB_DIR_OUT | USB_TYPE_VENDOR,
212 code_offset, 0, p, transfer_size, 1000 /* ms */);
213 if (r < 0) {
214 dev_err(&udev->dev,
215 "USB control request for firmware upload"
216 " failed. Error number %d\n", r);
217 goto error;
218 }
219 transfer_size = r & ~1;
220
221 size -= transfer_size;
222 data += transfer_size;
223 code_offset += transfer_size/sizeof(u16);
224 }
225
226 if (flags & REBOOT) {
227 u8 ret;
228
229 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
230 USB_REQ_FIRMWARE_CONFIRM,
231 USB_DIR_IN | USB_TYPE_VENDOR,
232 0, 0, &ret, sizeof(ret), 5000 /* ms */);
233 if (r != sizeof(ret)) {
234 dev_err(&udev->dev,
235 "control request firmeware confirmation failed."
236 " Return value %d\n", r);
237 if (r >= 0)
238 r = -ENODEV;
239 goto error;
240 }
241 if (ret & 0x80) {
242 dev_err(&udev->dev,
243 "Internal error while downloading."
244 " Firmware confirm return value %#04x\n",
245 (unsigned int)ret);
246 r = -ENODEV;
247 goto error;
248 }
249 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
250 (unsigned int)ret);
251 }
252
253 r = 0;
254error:
255 kfree(p);
256 return r;
257}
258
259static u16 get_word(const void *data, u16 offset)
260{
261 const __le16 *p = data;
262 return le16_to_cpu(p[offset]);
263}
264
265static char *get_fw_name(char *buffer, size_t size, u8 device_type,
266 const char* postfix)
267{
268 scnprintf(buffer, size, "%s%s",
269 device_type == DEVICE_ZD1211B ?
270 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
271 postfix);
272 return buffer;
273}
274
d066c219
DD		 275static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
276 const struct firmware *ub_fw)
277{
278 const struct firmware *ur_fw = NULL;
279 int offset;
280 int r = 0;
281 char fw_name[128];
282
283 r = request_fw_file(&ur_fw,
284 get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
285 &udev->dev);
286 if (r)
287 goto error;
288
289 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START_OFFSET,
290 REBOOT);
291 if (r)
292 goto error;
293
294 offset = ((EEPROM_REGS_OFFSET + EEPROM_REGS_SIZE) * sizeof(u16));
295 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
296 E2P_BASE_OFFSET + EEPROM_REGS_SIZE, REBOOT);
297
298 /* At this point, the vendor driver downloads the whole firmware
299 * image, hacks around with version IDs, and uploads it again,
300 * completely overwriting the boot code. We do not do this here as
301 * it is not required on any tested devices, and it is suspected to
302 * cause problems. */
303error:
304 release_firmware(ur_fw);
305 return r;
306}
307
e85d0918
DD		 308static int upload_firmware(struct usb_device *udev, u8 device_type)
309{
310 int r;
311 u16 fw_bcdDevice;
312 u16 bcdDevice;
313 const struct firmware *ub_fw = NULL;
314 const struct firmware *uph_fw = NULL;
315 char fw_name[128];
316
317 bcdDevice = get_bcdDevice(udev);
318
319 r = request_fw_file(&ub_fw,
320 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
321 &udev->dev);
322 if (r)
323 goto error;
324
325 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
326
e85d0918
DD		 327 if (fw_bcdDevice != bcdDevice) {
328 dev_info(&udev->dev,
d066c219
DD		 329 "firmware version %#06x and device bootcode version "
330 "%#06x differ\n", fw_bcdDevice, bcdDevice);
331 if (bcdDevice <= 0x4313)
332 dev_warn(&udev->dev, "device has old bootcode, please "
333 "report success or failure\n");
334
335 r = handle_version_mismatch(udev, device_type, ub_fw);
336 if (r)
337 goto error;
e85d0918
DD		 338 } else {
339 dev_dbg_f(&udev->dev,
340 "firmware device id %#06x is equal to the "
341 "actual device id\n", fw_bcdDevice);
342 }
343
344
345 r = request_fw_file(&uph_fw,
346 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
347 &udev->dev);
348 if (r)
349 goto error;
350
351 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
352 REBOOT);
353 if (r) {
354 dev_err(&udev->dev,
355 "Could not upload firmware code uph. Error number %d\n",
356 r);
357 }
358
359 /* FALL-THROUGH */
360error:
361 release_firmware(ub_fw);
362 release_firmware(uph_fw);
363 return r;
364}
365
366static void disable_read_regs_int(struct zd_usb *usb)
367{
368 struct zd_usb_interrupt *intr = &usb->intr;
369
e85d0918
DD		 370 spin_lock(&intr->lock);
371 intr->read_regs_enabled = 0;
372 spin_unlock(&intr->lock);
373}
374
375#define urb_dev(urb) (&(urb)->dev->dev)
376
377static inline void handle_regs_int(struct urb *urb)
378{
379 struct zd_usb *usb = urb->context;
380 struct zd_usb_interrupt *intr = &usb->intr;
381 int len;
382
383 ZD_ASSERT(in_interrupt());
384 spin_lock(&intr->lock);
385
386 if (intr->read_regs_enabled) {
387 intr->read_regs.length = len = urb->actual_length;
388
389 if (len > sizeof(intr->read_regs.buffer))
390 len = sizeof(intr->read_regs.buffer);
391 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
392 intr->read_regs_enabled = 0;
393 complete(&intr->read_regs.completion);
394 goto out;
395 }
396
397 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
398out:
399 spin_unlock(&intr->lock);
400}
401
402static inline void handle_retry_failed_int(struct urb *urb)
403{
404 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
405}
406
407
408static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
409{
410 int r;
411 struct usb_int_header *hdr;
412
413 switch (urb->status) {
414 case 0:
415 break;
416 case -ESHUTDOWN:
417 case -EINVAL:
418 case -ENODEV:
419 case -ENOENT:
420 case -ECONNRESET:
e85d0918 421 case -EPIPE:
b312d799 422 goto kfree;
e85d0918
DD		 423 default:
424 goto resubmit;
425 }
426
427 if (urb->actual_length < sizeof(hdr)) {
428 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
429 goto resubmit;
430 }
431
432 hdr = urb->transfer_buffer;
433 if (hdr->type != USB_INT_TYPE) {
434 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
435 goto resubmit;
436 }
437
438 switch (hdr->id) {
439 case USB_INT_ID_REGS:
440 handle_regs_int(urb);
441 break;
442 case USB_INT_ID_RETRY_FAILED:
443 handle_retry_failed_int(urb);
444 break;
445 default:
446 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
447 (unsigned int)hdr->id);
448 goto resubmit;
449 }
450
451resubmit:
452 r = usb_submit_urb(urb, GFP_ATOMIC);
453 if (r) {
454 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
455 goto kfree;
456 }
457 return;
458kfree:
459 kfree(urb->transfer_buffer);
460}
461
462static inline int int_urb_interval(struct usb_device *udev)
463{
464 switch (udev->speed) {
465 case USB_SPEED_HIGH:
466 return 4;
467 case USB_SPEED_LOW:
468 return 10;
469 case USB_SPEED_FULL:
470 default:
471 return 1;
472 }
473}
474
475static inline int usb_int_enabled(struct zd_usb *usb)
476{
477 unsigned long flags;
478 struct zd_usb_interrupt *intr = &usb->intr;
479 struct urb *urb;
480
481 spin_lock_irqsave(&intr->lock, flags);
482 urb = intr->urb;
483 spin_unlock_irqrestore(&intr->lock, flags);
484 return urb != NULL;
485}
486
487int zd_usb_enable_int(struct zd_usb *usb)
488{
489 int r;
490 struct usb_device *udev;
491 struct zd_usb_interrupt *intr = &usb->intr;
492 void *transfer_buffer = NULL;
493 struct urb *urb;
494
495 dev_dbg_f(zd_usb_dev(usb), "\n");
496
497 urb = usb_alloc_urb(0, GFP_NOFS);
498 if (!urb) {
499 r = -ENOMEM;
500 goto out;
501 }
502
503 ZD_ASSERT(!irqs_disabled());
504 spin_lock_irq(&intr->lock);
505 if (intr->urb) {
506 spin_unlock_irq(&intr->lock);
507 r = 0;
508 goto error_free_urb;
509 }
510 intr->urb = urb;
511 spin_unlock_irq(&intr->lock);
512
513 /* TODO: make it a DMA buffer */
514 r = -ENOMEM;
515 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
516 if (!transfer_buffer) {
517 dev_dbg_f(zd_usb_dev(usb),
518 "couldn't allocate transfer_buffer\n");
519 goto error_set_urb_null;
520 }
521
522 udev = zd_usb_to_usbdev(usb);
523 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
524 transfer_buffer, USB_MAX_EP_INT_BUFFER,
525 int_urb_complete, usb,
526 intr->interval);
527
528 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
529 r = usb_submit_urb(urb, GFP_NOFS);
530 if (r) {
531 dev_dbg_f(zd_usb_dev(usb),
532 "Couldn't submit urb. Error number %d\n", r);
533 goto error;
534 }
535
536 return 0;
537error:
538 kfree(transfer_buffer);
539error_set_urb_null:
540 spin_lock_irq(&intr->lock);
541 intr->urb = NULL;
542 spin_unlock_irq(&intr->lock);
543error_free_urb:
544 usb_free_urb(urb);
545out:
546 return r;
547}
548
549void zd_usb_disable_int(struct zd_usb *usb)
550{
551 unsigned long flags;
552 struct zd_usb_interrupt *intr = &usb->intr;
553 struct urb *urb;
554
555 spin_lock_irqsave(&intr->lock, flags);
556 urb = intr->urb;
557 if (!urb) {
558 spin_unlock_irqrestore(&intr->lock, flags);
559 return;
560 }
561 intr->urb = NULL;
562 spin_unlock_irqrestore(&intr->lock, flags);
563
564 usb_kill_urb(urb);
565 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
566 usb_free_urb(urb);
567}
568
569static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
570 unsigned int length)
571{
572 int i;
573 struct zd_mac *mac = zd_usb_to_mac(usb);
574 const struct rx_length_info *length_info;
575
576 if (length < sizeof(struct rx_length_info)) {
577 /* It's not a complete packet anyhow. */
578 return;
579 }
580 length_info = (struct rx_length_info *)
581 (buffer + length - sizeof(struct rx_length_info));
582
583 /* It might be that three frames are merged into a single URB
584 * transaction. We have to check for the length info tag.
585 *
586 * While testing we discovered that length_info might be unaligned,
587 * because if USB transactions are merged, the last packet will not
588 * be padded. Unaligned access might also happen if the length_info
589 * structure is not present.
590 */
b269825b
UK		 591 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
592 {
e85d0918
DD		 593 unsigned int l, k, n;
594 for (i = 0, l = 0;; i++) {
b269825b 595 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
e85d0918
DD		 596 n = l+k;
597 if (n > length)
598 return;
599 zd_mac_rx(mac, buffer+l, k);
600 if (i >= 2)
601 return;
602 l = (n+3) & ~3;
603 }
604 } else {
605 zd_mac_rx(mac, buffer, length);
606 }
607}
608
609static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
610{
611 struct zd_usb *usb;
612 struct zd_usb_rx *rx;
613 const u8 *buffer;
614 unsigned int length;
615
616 switch (urb->status) {
617 case 0:
618 break;
619 case -ESHUTDOWN:
620 case -EINVAL:
621 case -ENODEV:
622 case -ENOENT:
623 case -ECONNRESET:
e85d0918 624 case -EPIPE:
b312d799 625 return;
e85d0918
DD		 626 default:
627 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
628 goto resubmit;
629 }
630
631 buffer = urb->transfer_buffer;
632 length = urb->actual_length;
633 usb = urb->context;
634 rx = &usb->rx;
635
636 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
637 /* If there is an old first fragment, we don't care. */
638 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
639 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
640 spin_lock(&rx->lock);
641 memcpy(rx->fragment, buffer, length);
642 rx->fragment_length = length;
643 spin_unlock(&rx->lock);
644 goto resubmit;
645 }
646
647 spin_lock(&rx->lock);
648 if (rx->fragment_length > 0) {
649 /* We are on a second fragment, we believe */
650 ZD_ASSERT(length + rx->fragment_length <=
651 ARRAY_SIZE(rx->fragment));
652 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
653 memcpy(rx->fragment+rx->fragment_length, buffer, length);
654 handle_rx_packet(usb, rx->fragment,
655 rx->fragment_length + length);
656 rx->fragment_length = 0;
657 spin_unlock(&rx->lock);
658 } else {
659 spin_unlock(&rx->lock);
660 handle_rx_packet(usb, buffer, length);
661 }
662
663resubmit:
664 usb_submit_urb(urb, GFP_ATOMIC);
665}
666
667struct urb *alloc_urb(struct zd_usb *usb)
668{
669 struct usb_device *udev = zd_usb_to_usbdev(usb);
670 struct urb *urb;
671 void *buffer;
672
673 urb = usb_alloc_urb(0, GFP_NOFS);
674 if (!urb)
675 return NULL;
676 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
677 &urb->transfer_dma);
678 if (!buffer) {
679 usb_free_urb(urb);
680 return NULL;
681 }
682
683 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
684 buffer, USB_MAX_RX_SIZE,
685 rx_urb_complete, usb);
686 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
687
688 return urb;
689}
690
691void free_urb(struct urb *urb)
692{
693 if (!urb)
694 return;
695 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
696 urb->transfer_buffer, urb->transfer_dma);
697 usb_free_urb(urb);
698}
699
700int zd_usb_enable_rx(struct zd_usb *usb)
701{
702 int i, r;
703 struct zd_usb_rx *rx = &usb->rx;
704 struct urb **urbs;
705
706 dev_dbg_f(zd_usb_dev(usb), "\n");
707
708 r = -ENOMEM;
709 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
710 if (!urbs)
711 goto error;
712 for (i = 0; i < URBS_COUNT; i++) {
713 urbs[i] = alloc_urb(usb);
714 if (!urbs[i])
715 goto error;
716 }
717
718 ZD_ASSERT(!irqs_disabled());
719 spin_lock_irq(&rx->lock);
720 if (rx->urbs) {
721 spin_unlock_irq(&rx->lock);
722 r = 0;
723 goto error;
724 }
725 rx->urbs = urbs;
726 rx->urbs_count = URBS_COUNT;
727 spin_unlock_irq(&rx->lock);
728
729 for (i = 0; i < URBS_COUNT; i++) {
730 r = usb_submit_urb(urbs[i], GFP_NOFS);
731 if (r)
732 goto error_submit;
733 }
734
735 return 0;
736error_submit:
737 for (i = 0; i < URBS_COUNT; i++) {
738 usb_kill_urb(urbs[i]);
739 }
740 spin_lock_irq(&rx->lock);
741 rx->urbs = NULL;
742 rx->urbs_count = 0;
743 spin_unlock_irq(&rx->lock);
744error:
745 if (urbs) {
746 for (i = 0; i < URBS_COUNT; i++)
747 free_urb(urbs[i]);
748 }
749 return r;
750}
751
752void zd_usb_disable_rx(struct zd_usb *usb)
753{
754 int i;
755 unsigned long flags;
756 struct urb **urbs;
757 unsigned int count;
758 struct zd_usb_rx *rx = &usb->rx;
759
760 spin_lock_irqsave(&rx->lock, flags);
761 urbs = rx->urbs;
762 count = rx->urbs_count;
763 spin_unlock_irqrestore(&rx->lock, flags);
764 if (!urbs)
765 return;
766
767 for (i = 0; i < count; i++) {
768 usb_kill_urb(urbs[i]);
769 free_urb(urbs[i]);
770 }
771 kfree(urbs);
772
773 spin_lock_irqsave(&rx->lock, flags);
774 rx->urbs = NULL;
775 rx->urbs_count = 0;
776 spin_unlock_irqrestore(&rx->lock, flags);
777}
778
779static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
780{
781 int r;
782
783 switch (urb->status) {
784 case 0:
785 break;
786 case -ESHUTDOWN:
787 case -EINVAL:
788 case -ENODEV:
789 case -ENOENT:
790 case -ECONNRESET:
b312d799 791 case -EPIPE:
e85d0918
DD		 792 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
793 break;
e85d0918
DD		 794 default:
795 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
796 goto resubmit;
797 }
798free_urb:
799 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
800 urb->transfer_buffer, urb->transfer_dma);
801 usb_free_urb(urb);
802 return;
803resubmit:
804 r = usb_submit_urb(urb, GFP_ATOMIC);
805 if (r) {
806 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
807 goto free_urb;
808 }
809}
810
811/* Puts the frame on the USB endpoint. It doesn't wait for
812 * completion. The frame must contain the control set.
813 */
814int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
815{
816 int r;
817 struct usb_device *udev = zd_usb_to_usbdev(usb);
818 struct urb *urb;
819 void *buffer;
820
821 urb = usb_alloc_urb(0, GFP_ATOMIC);
822 if (!urb) {
823 r = -ENOMEM;
824 goto out;
825 }
826
827 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
828 &urb->transfer_dma);
829 if (!buffer) {
830 r = -ENOMEM;
831 goto error_free_urb;
832 }
833 memcpy(buffer, frame, length);
834
835 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
836 buffer, length, tx_urb_complete, NULL);
837 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
838
839 r = usb_submit_urb(urb, GFP_ATOMIC);
840 if (r)
841 goto error;
842 return 0;
843error:
844 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
845 urb->transfer_dma);
846error_free_urb:
847 usb_free_urb(urb);
848out:
849 return r;
850}
851
852static inline void init_usb_interrupt(struct zd_usb *usb)
853{
854 struct zd_usb_interrupt *intr = &usb->intr;
855
856 spin_lock_init(&intr->lock);
857 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
858 init_completion(&intr->read_regs.completion);
859 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
860}
861
862static inline void init_usb_rx(struct zd_usb *usb)
863{
864 struct zd_usb_rx *rx = &usb->rx;
865 spin_lock_init(&rx->lock);
866 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
867 rx->usb_packet_size = 512;
868 } else {
869 rx->usb_packet_size = 64;
870 }
871 ZD_ASSERT(rx->fragment_length == 0);
872}
873
874static inline void init_usb_tx(struct zd_usb *usb)
875{
876 /* FIXME: at this point we will allocate a fixed number of urb's for
877 * use in a cyclic scheme */
878}
879
880void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
881 struct usb_interface *intf)
882{
883 memset(usb, 0, sizeof(*usb));
884 usb->intf = usb_get_intf(intf);
885 usb_set_intfdata(usb->intf, netdev);
886 init_usb_interrupt(usb);
887 init_usb_tx(usb);
888 init_usb_rx(usb);
889}
890
891int zd_usb_init_hw(struct zd_usb *usb)
892{
893 int r;
894 struct zd_chip *chip = zd_usb_to_chip(usb);
895
896 ZD_ASSERT(mutex_is_locked(&chip->mutex));
897 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
898 USB_REG((u16)FW_BASE_ADDR_OFFSET));
899 if (r)
900 return r;
901 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
902 usb->fw_base_offset);
903
904 return 0;
905}
906
907void zd_usb_clear(struct zd_usb *usb)
908{
909 usb_set_intfdata(usb->intf, NULL);
910 usb_put_intf(usb->intf);
911 memset(usb, 0, sizeof(*usb));
912 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
913}
914
915static const char *speed(enum usb_device_speed speed)
916{
917 switch (speed) {
918 case USB_SPEED_LOW:
919 return "low";
920 case USB_SPEED_FULL:
921 return "full";
922 case USB_SPEED_HIGH:
923 return "high";
924 default:
925 return "unknown speed";
926 }
927}
928
929static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
930{
931 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
932 le16_to_cpu(udev->descriptor.idVendor),
933 le16_to_cpu(udev->descriptor.idProduct),
934 get_bcdDevice(udev),
935 speed(udev->speed));
936}
937
938int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
939{
940 struct usb_device *udev = interface_to_usbdev(usb->intf);
941 return scnprint_id(udev, buffer, size);
942}
943
944#ifdef DEBUG
945static void print_id(struct usb_device *udev)
946{
947 char buffer[40];
948
949 scnprint_id(udev, buffer, sizeof(buffer));
950 buffer[sizeof(buffer)-1] = 0;
951 dev_dbg_f(&udev->dev, "%s\n", buffer);
952}
953#else
954#define print_id(udev) do { } while (0)
955#endif
956
a1030e92
DD		 957static int eject_installer(struct usb_interface *intf)
958{
959 struct usb_device *udev = interface_to_usbdev(intf);
960 struct usb_host_interface *iface_desc = &intf->altsetting[0];
961 struct usb_endpoint_descriptor *endpoint;
962 unsigned char *cmd;
963 u8 bulk_out_ep;
964 int r;
965
966 /* Find bulk out endpoint */
967 endpoint = &iface_desc->endpoint[1].desc;
968 if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
969 (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
970 USB_ENDPOINT_XFER_BULK) {
971 bulk_out_ep = endpoint->bEndpointAddress;
972 } else {
973 dev_err(&udev->dev,
974 "zd1211rw: Could not find bulk out endpoint\n");
975 return -ENODEV;
976 }
977
978 cmd = kzalloc(31, GFP_KERNEL);
979 if (cmd == NULL)
980 return -ENODEV;
981
982 /* USB bulk command block */
983 cmd[0] = 0x55; /* bulk command signature */
984 cmd[1] = 0x53; /* bulk command signature */
985 cmd[2] = 0x42; /* bulk command signature */
986 cmd[3] = 0x43; /* bulk command signature */
987 cmd[14] = 6; /* command length */
988
989 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
990 cmd[19] = 0x2; /* eject disc */
991
992 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
993 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
994 cmd, 31, NULL, 2000);
995 kfree(cmd);
996 if (r)
997 return r;
998
999 /* At this point, the device disconnects and reconnects with the real
1000 * ID numbers. */
1001
1002 usb_set_intfdata(intf, NULL);
1003 return 0;
1004}
1005
e85d0918
DD		 1006static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1007{
1008 int r;
1009 struct usb_device *udev = interface_to_usbdev(intf);
1010 struct net_device *netdev = NULL;
1011
1012 print_id(udev);
1013
a1030e92
DD		 1014 if (id->driver_info & DEVICE_INSTALLER)
1015 return eject_installer(intf);
1016
e85d0918
DD		 1017 switch (udev->speed) {
1018 case USB_SPEED_LOW:
1019 case USB_SPEED_FULL:
1020 case USB_SPEED_HIGH:
1021 break;
1022 default:
1023 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1024 r = -ENODEV;
1025 goto error;
1026 }
1027
1028 netdev = zd_netdev_alloc(intf);
1029 if (netdev == NULL) {
1030 r = -ENOMEM;
1031 goto error;
1032 }
1033
1034 r = upload_firmware(udev, id->driver_info);
1035 if (r) {
1036 dev_err(&intf->dev,
1037 "couldn't load firmware. Error number %d\n", r);
1038 goto error;
1039 }
1040
1041 r = usb_reset_configuration(udev);
1042 if (r) {
1043 dev_dbg_f(&intf->dev,
1044 "couldn't reset configuration. Error number %d\n", r);
1045 goto error;
1046 }
1047
1048 /* At this point the interrupt endpoint is not generally enabled. We
1049 * save the USB bandwidth until the network device is opened. But
1050 * notify that the initialization of the MAC will require the
1051 * interrupts to be temporary enabled.
1052 */
1053 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
1054 if (r) {
1055 dev_dbg_f(&intf->dev,
1056 "couldn't initialize mac. Error number %d\n", r);
1057 goto error;
1058 }
1059
1060 r = register_netdev(netdev);
1061 if (r) {
1062 dev_dbg_f(&intf->dev,
1063 "couldn't register netdev. Error number %d\n", r);
1064 goto error;
1065 }
1066
1067 dev_dbg_f(&intf->dev, "successful\n");
1068 dev_info(&intf->dev,"%s\n", netdev->name);
1069 return 0;
1070error:
1071 usb_reset_device(interface_to_usbdev(intf));
1072 zd_netdev_free(netdev);
1073 return r;
1074}
1075
1076static void disconnect(struct usb_interface *intf)
1077{
1078 struct net_device *netdev = zd_intf_to_netdev(intf);
1079 struct zd_mac *mac = zd_netdev_mac(netdev);
1080 struct zd_usb *usb = &mac->chip.usb;
1081
a1030e92
DD		 1082 /* Either something really bad happened, or we're just dealing with
1083 * a DEVICE_INSTALLER. */
1084 if (netdev == NULL)
1085 return;
1086
e85d0918
DD		 1087 dev_dbg_f(zd_usb_dev(usb), "\n");
1088
1089 zd_netdev_disconnect(netdev);
1090
1091 /* Just in case something has gone wrong! */
1092 zd_usb_disable_rx(usb);
1093 zd_usb_disable_int(usb);
1094
1095 /* If the disconnect has been caused by a removal of the
1096 * driver module, the reset allows reloading of the driver. If the
1097 * reset will not be executed here, the upload of the firmware in the
1098 * probe function caused by the reloading of the driver will fail.
1099 */
1100 usb_reset_device(interface_to_usbdev(intf));
1101
1102 /* If somebody still waits on this lock now, this is an error. */
1103 zd_netdev_free(netdev);
1104 dev_dbg(&intf->dev, "disconnected\n");
1105}
1106
1107static struct usb_driver driver = {
1108 .name = "zd1211rw",
1109 .id_table = usb_ids,
1110 .probe = probe,
1111 .disconnect = disconnect,
1112};
1113
1114static int __init usb_init(void)
1115{
1116 int r;
1117
1118 pr_debug("usb_init()\n");
1119
1120 r = usb_register(&driver);
1121 if (r) {
1122 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1123 return r;
1124 }
1125
1126 pr_debug("zd1211rw initialized\n");
1127 return 0;
1128}
1129
1130static void __exit usb_exit(void)
1131{
1132 pr_debug("usb_exit()\n");
1133 usb_deregister(&driver);
1134}
1135
1136module_init(usb_init);
1137module_exit(usb_exit);
1138
1139static int usb_int_regs_length(unsigned int count)
1140{
1141 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1142}
1143
1144static void prepare_read_regs_int(struct zd_usb *usb)
1145{
1146 struct zd_usb_interrupt *intr = &usb->intr;
1147
1148 spin_lock(&intr->lock);
1149 intr->read_regs_enabled = 1;
1150 INIT_COMPLETION(intr->read_regs.completion);
1151 spin_unlock(&intr->lock);
1152}
1153
1154static int get_results(struct zd_usb *usb, u16 *values,
1155 struct usb_req_read_regs *req, unsigned int count)
1156{
1157 int r;
1158 int i;
1159 struct zd_usb_interrupt *intr = &usb->intr;
1160 struct read_regs_int *rr = &intr->read_regs;
1161 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1162
1163 spin_lock(&intr->lock);
1164
1165 r = -EIO;
1166 /* The created block size seems to be larger than expected.
1167 * However results appear to be correct.
1168 */
1169 if (rr->length < usb_int_regs_length(count)) {
1170 dev_dbg_f(zd_usb_dev(usb),
1171 "error: actual length %d less than expected %d\n",
1172 rr->length, usb_int_regs_length(count));
1173 goto error_unlock;
1174 }
1175 if (rr->length > sizeof(rr->buffer)) {
1176 dev_dbg_f(zd_usb_dev(usb),
1177 "error: actual length %d exceeds buffer size %zu\n",
1178 rr->length, sizeof(rr->buffer));
1179 goto error_unlock;
1180 }
1181
1182 for (i = 0; i < count; i++) {
1183 struct reg_data *rd = &regs->regs[i];
1184 if (rd->addr != req->addr[i]) {
1185 dev_dbg_f(zd_usb_dev(usb),
1186 "rd[%d] addr %#06hx expected %#06hx\n", i,
1187 le16_to_cpu(rd->addr),
1188 le16_to_cpu(req->addr[i]));
1189 goto error_unlock;
1190 }
1191 values[i] = le16_to_cpu(rd->value);
1192 }
1193
1194 r = 0;
1195error_unlock:
1196 spin_unlock(&intr->lock);
1197 return r;
1198}
1199
1200int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1201 const zd_addr_t *addresses, unsigned int count)
1202{
1203 int r;
1204 int i, req_len, actual_req_len;
1205 struct usb_device *udev;
1206 struct usb_req_read_regs *req = NULL;
1207 unsigned long timeout;
1208
1209 if (count < 1) {
1210 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1211 return -EINVAL;
1212 }
1213 if (count > USB_MAX_IOREAD16_COUNT) {
1214 dev_dbg_f(zd_usb_dev(usb),
1215 "error: count %u exceeds possible max %u\n",
1216 count, USB_MAX_IOREAD16_COUNT);
1217 return -EINVAL;
1218 }
1219 if (in_atomic()) {
1220 dev_dbg_f(zd_usb_dev(usb),
1221 "error: io in atomic context not supported\n");
1222 return -EWOULDBLOCK;
1223 }
1224 if (!usb_int_enabled(usb)) {
1225 dev_dbg_f(zd_usb_dev(usb),
1226 "error: usb interrupt not enabled\n");
1227 return -EWOULDBLOCK;
1228 }
1229
1230 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1231 req = kmalloc(req_len, GFP_NOFS);
1232 if (!req)
1233 return -ENOMEM;
1234 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1235 for (i = 0; i < count; i++)
1236 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1237
1238 udev = zd_usb_to_usbdev(usb);
1239 prepare_read_regs_int(usb);
1240 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1241 req, req_len, &actual_req_len, 1000 /* ms */);
1242 if (r) {
1243 dev_dbg_f(zd_usb_dev(usb),
1244 "error in usb_bulk_msg(). Error number %d\n", r);
1245 goto error;
1246 }
1247 if (req_len != actual_req_len) {
1248 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1249 " req_len %d != actual_req_len %d\n",
1250 req_len, actual_req_len);
1251 r = -EIO;
1252 goto error;
1253 }
1254
1255 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1256 msecs_to_jiffies(1000));
1257 if (!timeout) {
1258 disable_read_regs_int(usb);
1259 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1260 r = -ETIMEDOUT;
1261 goto error;
1262 }
1263
1264 r = get_results(usb, values, req, count);
1265error:
1266 kfree(req);
1267 return r;
1268}
1269
1270int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1271 unsigned int count)
1272{
1273 int r;
1274 struct usb_device *udev;
1275 struct usb_req_write_regs *req = NULL;
1276 int i, req_len, actual_req_len;
1277
1278 if (count == 0)
1279 return 0;
1280 if (count > USB_MAX_IOWRITE16_COUNT) {
1281 dev_dbg_f(zd_usb_dev(usb),
1282 "error: count %u exceeds possible max %u\n",
1283 count, USB_MAX_IOWRITE16_COUNT);
1284 return -EINVAL;
1285 }
1286 if (in_atomic()) {
1287 dev_dbg_f(zd_usb_dev(usb),
1288 "error: io in atomic context not supported\n");
1289 return -EWOULDBLOCK;
1290 }
1291
1292 req_len = sizeof(struct usb_req_write_regs) +
1293 count * sizeof(struct reg_data);
1294 req = kmalloc(req_len, GFP_NOFS);
1295 if (!req)
1296 return -ENOMEM;
1297
1298 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1299 for (i = 0; i < count; i++) {
1300 struct reg_data *rw = &req->reg_writes[i];
1301 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1302 rw->value = cpu_to_le16(ioreqs[i].value);
1303 }
1304
1305 udev = zd_usb_to_usbdev(usb);
1306 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1307 req, req_len, &actual_req_len, 1000 /* ms */);
1308 if (r) {
1309 dev_dbg_f(zd_usb_dev(usb),
1310 "error in usb_bulk_msg(). Error number %d\n", r);
1311 goto error;
1312 }
1313 if (req_len != actual_req_len) {
1314 dev_dbg_f(zd_usb_dev(usb),
1315 "error in usb_bulk_msg()"
1316 " req_len %d != actual_req_len %d\n",
1317 req_len, actual_req_len);
1318 r = -EIO;
1319 goto error;
1320 }
1321
1322 /* FALL-THROUGH with r == 0 */
1323error:
1324 kfree(req);
1325 return r;
1326}
1327
1328int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1329{
1330 int r;
1331 struct usb_device *udev;
1332 struct usb_req_rfwrite *req = NULL;
1333 int i, req_len, actual_req_len;
1334 u16 bit_value_template;
1335
1336 if (in_atomic()) {
1337 dev_dbg_f(zd_usb_dev(usb),
1338 "error: io in atomic context not supported\n");
1339 return -EWOULDBLOCK;
1340 }
1341 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1342 dev_dbg_f(zd_usb_dev(usb),
1343 "error: bits %d are smaller than"
1344 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1345 bits, USB_MIN_RFWRITE_BIT_COUNT);
1346 return -EINVAL;
1347 }
1348 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1349 dev_dbg_f(zd_usb_dev(usb),
1350 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1351 bits, USB_MAX_RFWRITE_BIT_COUNT);
1352 return -EINVAL;
1353 }
1354#ifdef DEBUG
1355 if (value & (~0UL << bits)) {
1356 dev_dbg_f(zd_usb_dev(usb),
1357 "error: value %#09x has bits >= %d set\n",
1358 value, bits);
1359 return -EINVAL;
1360 }
1361#endif /* DEBUG */
1362
1363 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1364
1365 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1366 if (r) {
1367 dev_dbg_f(zd_usb_dev(usb),
1368 "error %d: Couldn't read CR203\n", r);
1369 goto out;
1370 }
1371 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1372
1373 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1374 req = kmalloc(req_len, GFP_NOFS);
1375 if (!req)
1376 return -ENOMEM;
1377
1378 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1379 /* 1: 3683a, but not used in ZYDAS driver */
1380 req->value = cpu_to_le16(2);
1381 req->bits = cpu_to_le16(bits);
1382
1383 for (i = 0; i < bits; i++) {
1384 u16 bv = bit_value_template;
1385 if (value & (1 << (bits-1-i)))
1386 bv |= RF_DATA;
1387 req->bit_values[i] = cpu_to_le16(bv);
1388 }
1389
1390 udev = zd_usb_to_usbdev(usb);
1391 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1392 req, req_len, &actual_req_len, 1000 /* ms */);
1393 if (r) {
1394 dev_dbg_f(zd_usb_dev(usb),
1395 "error in usb_bulk_msg(). Error number %d\n", r);
1396 goto out;
1397 }
1398 if (req_len != actual_req_len) {
1399 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1400 " req_len %d != actual_req_len %d\n",
1401 req_len, actual_req_len);
1402 r = -EIO;
1403 goto out;
1404 }
1405
1406 /* FALL-THROUGH with r == 0 */
1407out:
1408 kfree(req);
1409 return r;
1410}
Linux kernel - Deliverables
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