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[PATCH] zd1211rw: Removes wrong assertions
[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 },
fca2714f 47 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
fc3e39be 48 { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
e85d0918
DD		 49 /* ZD1211B */
50 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
51 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
dd2f5538 52 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
943599ee 53 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
a1030e92
DD		 54 /* "Driverless" devices that need ejecting */
55 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
e85d0918
DD		 56 {}
57};
58
59MODULE_LICENSE("GPL");
60MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
61MODULE_AUTHOR("Ulrich Kunitz");
62MODULE_AUTHOR("Daniel Drake");
63MODULE_VERSION("1.0");
64MODULE_DEVICE_TABLE(usb, usb_ids);
65
66#define FW_ZD1211_PREFIX "zd1211/zd1211_"
67#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
68
69/* register address handling */
70
71#ifdef DEBUG
72static int check_addr(struct zd_usb *usb, zd_addr_t addr)
73{
74 u32 base = ZD_ADDR_BASE(addr);
75 u32 offset = ZD_OFFSET(addr);
76
77 if ((u32)addr & ADDR_ZERO_MASK)
78 goto invalid_address;
79 switch (base) {
80 case USB_BASE:
81 break;
82 case CR_BASE:
83 if (offset > CR_MAX_OFFSET) {
84 dev_dbg(zd_usb_dev(usb),
85 "CR offset %#010x larger than"
86 " CR_MAX_OFFSET %#10x\n",
87 offset, CR_MAX_OFFSET);
88 goto invalid_address;
89 }
90 if (offset & 1) {
91 dev_dbg(zd_usb_dev(usb),
92 "CR offset %#010x is not a multiple of 2\n",
93 offset);
94 goto invalid_address;
95 }
96 break;
97 case E2P_BASE:
98 if (offset > E2P_MAX_OFFSET) {
99 dev_dbg(zd_usb_dev(usb),
100 "E2P offset %#010x larger than"
101 " E2P_MAX_OFFSET %#010x\n",
102 offset, E2P_MAX_OFFSET);
103 goto invalid_address;
104 }
105 break;
106 case FW_BASE:
107 if (!usb->fw_base_offset) {
108 dev_dbg(zd_usb_dev(usb),
109 "ERROR: fw base offset has not been set\n");
110 return -EAGAIN;
111 }
112 if (offset > FW_MAX_OFFSET) {
113 dev_dbg(zd_usb_dev(usb),
114 "FW offset %#10x is larger than"
115 " FW_MAX_OFFSET %#010x\n",
116 offset, FW_MAX_OFFSET);
117 goto invalid_address;
118 }
119 break;
120 default:
121 dev_dbg(zd_usb_dev(usb),
122 "address has unsupported base %#010x\n", addr);
123 goto invalid_address;
124 }
125
126 return 0;
127invalid_address:
128 dev_dbg(zd_usb_dev(usb),
129 "ERROR: invalid address: %#010x\n", addr);
130 return -EINVAL;
131}
132#endif /* DEBUG */
133
134static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
135{
136 u32 base;
137 u16 offset;
138
139 base = ZD_ADDR_BASE(addr);
140 offset = ZD_OFFSET(addr);
141
142 ZD_ASSERT(check_addr(usb, addr) == 0);
143
144 switch (base) {
145 case CR_BASE:
146 offset += CR_BASE_OFFSET;
147 break;
148 case E2P_BASE:
149 offset += E2P_BASE_OFFSET;
150 break;
151 case FW_BASE:
152 offset += usb->fw_base_offset;
153 break;
154 }
155
156 return offset;
157}
158
159/* USB device initialization */
160
161static int request_fw_file(
162 const struct firmware **fw, const char *name, struct device *device)
163{
164 int r;
165
166 dev_dbg_f(device, "fw name %s\n", name);
167
168 r = request_firmware(fw, name, device);
169 if (r)
170 dev_err(device,
171 "Could not load firmware file %s. Error number %d\n",
172 name, r);
173 return r;
174}
175
176static inline u16 get_bcdDevice(const struct usb_device *udev)
177{
178 return le16_to_cpu(udev->descriptor.bcdDevice);
179}
180
181enum upload_code_flags {
182 REBOOT = 1,
183};
184
185/* Ensures that MAX_TRANSFER_SIZE is even. */
186#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
187
188static int upload_code(struct usb_device *udev,
189 const u8 *data, size_t size, u16 code_offset, int flags)
190{
191 u8 *p;
192 int r;
193
194 /* USB request blocks need "kmalloced" buffers.
195 */
196 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
197 if (!p) {
198 dev_err(&udev->dev, "out of memory\n");
199 r = -ENOMEM;
200 goto error;
201 }
202
203 size &= ~1;
204 while (size > 0) {
205 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
206 size : MAX_TRANSFER_SIZE;
207
208 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
209
210 memcpy(p, data, transfer_size);
211 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
212 USB_REQ_FIRMWARE_DOWNLOAD,
213 USB_DIR_OUT | USB_TYPE_VENDOR,
214 code_offset, 0, p, transfer_size, 1000 /* ms */);
215 if (r < 0) {
216 dev_err(&udev->dev,
217 "USB control request for firmware upload"
218 " failed. Error number %d\n", r);
219 goto error;
220 }
221 transfer_size = r & ~1;
222
223 size -= transfer_size;
224 data += transfer_size;
225 code_offset += transfer_size/sizeof(u16);
226 }
227
228 if (flags & REBOOT) {
229 u8 ret;
230
231 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
232 USB_REQ_FIRMWARE_CONFIRM,
233 USB_DIR_IN | USB_TYPE_VENDOR,
234 0, 0, &ret, sizeof(ret), 5000 /* ms */);
235 if (r != sizeof(ret)) {
236 dev_err(&udev->dev,
237 "control request firmeware confirmation failed."
238 " Return value %d\n", r);
239 if (r >= 0)
240 r = -ENODEV;
241 goto error;
242 }
243 if (ret & 0x80) {
244 dev_err(&udev->dev,
245 "Internal error while downloading."
246 " Firmware confirm return value %#04x\n",
247 (unsigned int)ret);
248 r = -ENODEV;
249 goto error;
250 }
251 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
252 (unsigned int)ret);
253 }
254
255 r = 0;
256error:
257 kfree(p);
258 return r;
259}
260
261static u16 get_word(const void *data, u16 offset)
262{
263 const __le16 *p = data;
264 return le16_to_cpu(p[offset]);
265}
266
267static char *get_fw_name(char *buffer, size_t size, u8 device_type,
268 const char* postfix)
269{
270 scnprintf(buffer, size, "%s%s",
271 device_type == DEVICE_ZD1211B ?
272 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
273 postfix);
274 return buffer;
275}
276
d066c219
DD		 277static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
278 const struct firmware *ub_fw)
279{
280 const struct firmware *ur_fw = NULL;
281 int offset;
282 int r = 0;
283 char fw_name[128];
284
285 r = request_fw_file(&ur_fw,
286 get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
287 &udev->dev);
288 if (r)
289 goto error;
290
291 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START_OFFSET,
292 REBOOT);
293 if (r)
294 goto error;
295
296 offset = ((EEPROM_REGS_OFFSET + EEPROM_REGS_SIZE) * sizeof(u16));
297 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
298 E2P_BASE_OFFSET + EEPROM_REGS_SIZE, REBOOT);
299
300 /* At this point, the vendor driver downloads the whole firmware
301 * image, hacks around with version IDs, and uploads it again,
302 * completely overwriting the boot code. We do not do this here as
303 * it is not required on any tested devices, and it is suspected to
304 * cause problems. */
305error:
306 release_firmware(ur_fw);
307 return r;
308}
309
e85d0918
DD		 310static int upload_firmware(struct usb_device *udev, u8 device_type)
311{
312 int r;
313 u16 fw_bcdDevice;
314 u16 bcdDevice;
315 const struct firmware *ub_fw = NULL;
316 const struct firmware *uph_fw = NULL;
317 char fw_name[128];
318
319 bcdDevice = get_bcdDevice(udev);
320
321 r = request_fw_file(&ub_fw,
322 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
323 &udev->dev);
324 if (r)
325 goto error;
326
327 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
328
e85d0918
DD		 329 if (fw_bcdDevice != bcdDevice) {
330 dev_info(&udev->dev,
d066c219
DD		 331 "firmware version %#06x and device bootcode version "
332 "%#06x differ\n", fw_bcdDevice, bcdDevice);
333 if (bcdDevice <= 0x4313)
334 dev_warn(&udev->dev, "device has old bootcode, please "
335 "report success or failure\n");
336
337 r = handle_version_mismatch(udev, device_type, ub_fw);
338 if (r)
339 goto error;
e85d0918
DD		 340 } else {
341 dev_dbg_f(&udev->dev,
342 "firmware device id %#06x is equal to the "
343 "actual device id\n", fw_bcdDevice);
344 }
345
346
347 r = request_fw_file(&uph_fw,
348 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
349 &udev->dev);
350 if (r)
351 goto error;
352
353 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
354 REBOOT);
355 if (r) {
356 dev_err(&udev->dev,
357 "Could not upload firmware code uph. Error number %d\n",
358 r);
359 }
360
361 /* FALL-THROUGH */
362error:
363 release_firmware(ub_fw);
364 release_firmware(uph_fw);
365 return r;
366}
367
368static void disable_read_regs_int(struct zd_usb *usb)
369{
370 struct zd_usb_interrupt *intr = &usb->intr;
371
e85d0918
DD		 372 spin_lock(&intr->lock);
373 intr->read_regs_enabled = 0;
374 spin_unlock(&intr->lock);
375}
376
377#define urb_dev(urb) (&(urb)->dev->dev)
378
379static inline void handle_regs_int(struct urb *urb)
380{
381 struct zd_usb *usb = urb->context;
382 struct zd_usb_interrupt *intr = &usb->intr;
383 int len;
384
385 ZD_ASSERT(in_interrupt());
386 spin_lock(&intr->lock);
387
388 if (intr->read_regs_enabled) {
389 intr->read_regs.length = len = urb->actual_length;
390
391 if (len > sizeof(intr->read_regs.buffer))
392 len = sizeof(intr->read_regs.buffer);
393 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
394 intr->read_regs_enabled = 0;
395 complete(&intr->read_regs.completion);
396 goto out;
397 }
398
399 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
400out:
401 spin_unlock(&intr->lock);
402}
403
404static inline void handle_retry_failed_int(struct urb *urb)
405{
406 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
407}
408
409
410static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
411{
412 int r;
413 struct usb_int_header *hdr;
414
415 switch (urb->status) {
416 case 0:
417 break;
418 case -ESHUTDOWN:
419 case -EINVAL:
420 case -ENODEV:
421 case -ENOENT:
422 case -ECONNRESET:
e85d0918 423 case -EPIPE:
b312d799 424 goto kfree;
e85d0918
DD		 425 default:
426 goto resubmit;
427 }
428
429 if (urb->actual_length < sizeof(hdr)) {
430 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
431 goto resubmit;
432 }
433
434 hdr = urb->transfer_buffer;
435 if (hdr->type != USB_INT_TYPE) {
436 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
437 goto resubmit;
438 }
439
440 switch (hdr->id) {
441 case USB_INT_ID_REGS:
442 handle_regs_int(urb);
443 break;
444 case USB_INT_ID_RETRY_FAILED:
445 handle_retry_failed_int(urb);
446 break;
447 default:
448 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
449 (unsigned int)hdr->id);
450 goto resubmit;
451 }
452
453resubmit:
454 r = usb_submit_urb(urb, GFP_ATOMIC);
455 if (r) {
456 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
457 goto kfree;
458 }
459 return;
460kfree:
461 kfree(urb->transfer_buffer);
462}
463
464static inline int int_urb_interval(struct usb_device *udev)
465{
466 switch (udev->speed) {
467 case USB_SPEED_HIGH:
468 return 4;
469 case USB_SPEED_LOW:
470 return 10;
471 case USB_SPEED_FULL:
472 default:
473 return 1;
474 }
475}
476
477static inline int usb_int_enabled(struct zd_usb *usb)
478{
479 unsigned long flags;
480 struct zd_usb_interrupt *intr = &usb->intr;
481 struct urb *urb;
482
483 spin_lock_irqsave(&intr->lock, flags);
484 urb = intr->urb;
485 spin_unlock_irqrestore(&intr->lock, flags);
486 return urb != NULL;
487}
488
489int zd_usb_enable_int(struct zd_usb *usb)
490{
491 int r;
492 struct usb_device *udev;
493 struct zd_usb_interrupt *intr = &usb->intr;
494 void *transfer_buffer = NULL;
495 struct urb *urb;
496
497 dev_dbg_f(zd_usb_dev(usb), "\n");
498
499 urb = usb_alloc_urb(0, GFP_NOFS);
500 if (!urb) {
501 r = -ENOMEM;
502 goto out;
503 }
504
505 ZD_ASSERT(!irqs_disabled());
506 spin_lock_irq(&intr->lock);
507 if (intr->urb) {
508 spin_unlock_irq(&intr->lock);
509 r = 0;
510 goto error_free_urb;
511 }
512 intr->urb = urb;
513 spin_unlock_irq(&intr->lock);
514
515 /* TODO: make it a DMA buffer */
516 r = -ENOMEM;
517 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
518 if (!transfer_buffer) {
519 dev_dbg_f(zd_usb_dev(usb),
520 "couldn't allocate transfer_buffer\n");
521 goto error_set_urb_null;
522 }
523
524 udev = zd_usb_to_usbdev(usb);
525 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
526 transfer_buffer, USB_MAX_EP_INT_BUFFER,
527 int_urb_complete, usb,
528 intr->interval);
529
530 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
531 r = usb_submit_urb(urb, GFP_NOFS);
532 if (r) {
533 dev_dbg_f(zd_usb_dev(usb),
534 "Couldn't submit urb. Error number %d\n", r);
535 goto error;
536 }
537
538 return 0;
539error:
540 kfree(transfer_buffer);
541error_set_urb_null:
542 spin_lock_irq(&intr->lock);
543 intr->urb = NULL;
544 spin_unlock_irq(&intr->lock);
545error_free_urb:
546 usb_free_urb(urb);
547out:
548 return r;
549}
550
551void zd_usb_disable_int(struct zd_usb *usb)
552{
553 unsigned long flags;
554 struct zd_usb_interrupt *intr = &usb->intr;
555 struct urb *urb;
556
557 spin_lock_irqsave(&intr->lock, flags);
558 urb = intr->urb;
559 if (!urb) {
560 spin_unlock_irqrestore(&intr->lock, flags);
561 return;
562 }
563 intr->urb = NULL;
564 spin_unlock_irqrestore(&intr->lock, flags);
565
566 usb_kill_urb(urb);
567 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
568 usb_free_urb(urb);
569}
570
571static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
572 unsigned int length)
573{
574 int i;
575 struct zd_mac *mac = zd_usb_to_mac(usb);
576 const struct rx_length_info *length_info;
577
578 if (length < sizeof(struct rx_length_info)) {
579 /* It's not a complete packet anyhow. */
580 return;
581 }
582 length_info = (struct rx_length_info *)
583 (buffer + length - sizeof(struct rx_length_info));
584
585 /* It might be that three frames are merged into a single URB
586 * transaction. We have to check for the length info tag.
587 *
588 * While testing we discovered that length_info might be unaligned,
589 * because if USB transactions are merged, the last packet will not
590 * be padded. Unaligned access might also happen if the length_info
591 * structure is not present.
592 */
b269825b
UK		 593 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
594 {
e85d0918
DD		 595 unsigned int l, k, n;
596 for (i = 0, l = 0;; i++) {
b269825b 597 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
e85d0918
DD		 598 n = l+k;
599 if (n > length)
600 return;
601 zd_mac_rx(mac, buffer+l, k);
602 if (i >= 2)
603 return;
604 l = (n+3) & ~3;
605 }
606 } else {
607 zd_mac_rx(mac, buffer, length);
608 }
609}
610
611static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
612{
613 struct zd_usb *usb;
614 struct zd_usb_rx *rx;
615 const u8 *buffer;
616 unsigned int length;
617
618 switch (urb->status) {
619 case 0:
620 break;
621 case -ESHUTDOWN:
622 case -EINVAL:
623 case -ENODEV:
624 case -ENOENT:
625 case -ECONNRESET:
e85d0918 626 case -EPIPE:
b312d799 627 return;
e85d0918
DD		 628 default:
629 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
630 goto resubmit;
631 }
632
633 buffer = urb->transfer_buffer;
634 length = urb->actual_length;
635 usb = urb->context;
636 rx = &usb->rx;
637
638 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
639 /* If there is an old first fragment, we don't care. */
640 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
641 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
642 spin_lock(&rx->lock);
643 memcpy(rx->fragment, buffer, length);
644 rx->fragment_length = length;
645 spin_unlock(&rx->lock);
646 goto resubmit;
647 }
648
649 spin_lock(&rx->lock);
650 if (rx->fragment_length > 0) {
651 /* We are on a second fragment, we believe */
652 ZD_ASSERT(length + rx->fragment_length <=
653 ARRAY_SIZE(rx->fragment));
654 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
655 memcpy(rx->fragment+rx->fragment_length, buffer, length);
656 handle_rx_packet(usb, rx->fragment,
657 rx->fragment_length + length);
658 rx->fragment_length = 0;
659 spin_unlock(&rx->lock);
660 } else {
661 spin_unlock(&rx->lock);
662 handle_rx_packet(usb, buffer, length);
663 }
664
665resubmit:
666 usb_submit_urb(urb, GFP_ATOMIC);
667}
668
c48cf125 669static struct urb *alloc_urb(struct zd_usb *usb)
e85d0918
DD		 670{
671 struct usb_device *udev = zd_usb_to_usbdev(usb);
672 struct urb *urb;
673 void *buffer;
674
675 urb = usb_alloc_urb(0, GFP_NOFS);
676 if (!urb)
677 return NULL;
678 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
679 &urb->transfer_dma);
680 if (!buffer) {
681 usb_free_urb(urb);
682 return NULL;
683 }
684
685 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
686 buffer, USB_MAX_RX_SIZE,
687 rx_urb_complete, usb);
688 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
689
690 return urb;
691}
692
c48cf125 693static void free_urb(struct urb *urb)
e85d0918
DD		 694{
695 if (!urb)
696 return;
697 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
698 urb->transfer_buffer, urb->transfer_dma);
699 usb_free_urb(urb);
700}
701
702int zd_usb_enable_rx(struct zd_usb *usb)
703{
704 int i, r;
705 struct zd_usb_rx *rx = &usb->rx;
706 struct urb **urbs;
707
708 dev_dbg_f(zd_usb_dev(usb), "\n");
709
710 r = -ENOMEM;
711 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
712 if (!urbs)
713 goto error;
714 for (i = 0; i < URBS_COUNT; i++) {
715 urbs[i] = alloc_urb(usb);
716 if (!urbs[i])
717 goto error;
718 }
719
720 ZD_ASSERT(!irqs_disabled());
721 spin_lock_irq(&rx->lock);
722 if (rx->urbs) {
723 spin_unlock_irq(&rx->lock);
724 r = 0;
725 goto error;
726 }
727 rx->urbs = urbs;
728 rx->urbs_count = URBS_COUNT;
729 spin_unlock_irq(&rx->lock);
730
731 for (i = 0; i < URBS_COUNT; i++) {
732 r = usb_submit_urb(urbs[i], GFP_NOFS);
733 if (r)
734 goto error_submit;
735 }
736
737 return 0;
738error_submit:
739 for (i = 0; i < URBS_COUNT; i++) {
740 usb_kill_urb(urbs[i]);
741 }
742 spin_lock_irq(&rx->lock);
743 rx->urbs = NULL;
744 rx->urbs_count = 0;
745 spin_unlock_irq(&rx->lock);
746error:
747 if (urbs) {
748 for (i = 0; i < URBS_COUNT; i++)
749 free_urb(urbs[i]);
750 }
751 return r;
752}
753
754void zd_usb_disable_rx(struct zd_usb *usb)
755{
756 int i;
757 unsigned long flags;
758 struct urb **urbs;
759 unsigned int count;
760 struct zd_usb_rx *rx = &usb->rx;
761
762 spin_lock_irqsave(&rx->lock, flags);
763 urbs = rx->urbs;
764 count = rx->urbs_count;
765 spin_unlock_irqrestore(&rx->lock, flags);
766 if (!urbs)
767 return;
768
769 for (i = 0; i < count; i++) {
770 usb_kill_urb(urbs[i]);
771 free_urb(urbs[i]);
772 }
773 kfree(urbs);
774
775 spin_lock_irqsave(&rx->lock, flags);
776 rx->urbs = NULL;
777 rx->urbs_count = 0;
778 spin_unlock_irqrestore(&rx->lock, flags);
779}
780
781static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
782{
783 int r;
784
785 switch (urb->status) {
786 case 0:
787 break;
788 case -ESHUTDOWN:
789 case -EINVAL:
790 case -ENODEV:
791 case -ENOENT:
792 case -ECONNRESET:
b312d799 793 case -EPIPE:
e85d0918
DD		 794 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
795 break;
e85d0918
DD		 796 default:
797 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
798 goto resubmit;
799 }
800free_urb:
801 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
802 urb->transfer_buffer, urb->transfer_dma);
803 usb_free_urb(urb);
804 return;
805resubmit:
806 r = usb_submit_urb(urb, GFP_ATOMIC);
807 if (r) {
808 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
809 goto free_urb;
810 }
811}
812
813/* Puts the frame on the USB endpoint. It doesn't wait for
814 * completion. The frame must contain the control set.
815 */
816int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
817{
818 int r;
819 struct usb_device *udev = zd_usb_to_usbdev(usb);
820 struct urb *urb;
821 void *buffer;
822
823 urb = usb_alloc_urb(0, GFP_ATOMIC);
824 if (!urb) {
825 r = -ENOMEM;
826 goto out;
827 }
828
829 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
830 &urb->transfer_dma);
831 if (!buffer) {
832 r = -ENOMEM;
833 goto error_free_urb;
834 }
835 memcpy(buffer, frame, length);
836
837 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
838 buffer, length, tx_urb_complete, NULL);
839 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
840
841 r = usb_submit_urb(urb, GFP_ATOMIC);
842 if (r)
843 goto error;
844 return 0;
845error:
846 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
847 urb->transfer_dma);
848error_free_urb:
849 usb_free_urb(urb);
850out:
851 return r;
852}
853
854static inline void init_usb_interrupt(struct zd_usb *usb)
855{
856 struct zd_usb_interrupt *intr = &usb->intr;
857
858 spin_lock_init(&intr->lock);
859 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
860 init_completion(&intr->read_regs.completion);
861 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
862}
863
864static inline void init_usb_rx(struct zd_usb *usb)
865{
866 struct zd_usb_rx *rx = &usb->rx;
867 spin_lock_init(&rx->lock);
868 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
869 rx->usb_packet_size = 512;
870 } else {
871 rx->usb_packet_size = 64;
872 }
873 ZD_ASSERT(rx->fragment_length == 0);
874}
875
876static inline void init_usb_tx(struct zd_usb *usb)
877{
878 /* FIXME: at this point we will allocate a fixed number of urb's for
879 * use in a cyclic scheme */
880}
881
882void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
883 struct usb_interface *intf)
884{
885 memset(usb, 0, sizeof(*usb));
886 usb->intf = usb_get_intf(intf);
887 usb_set_intfdata(usb->intf, netdev);
888 init_usb_interrupt(usb);
889 init_usb_tx(usb);
890 init_usb_rx(usb);
891}
892
893int zd_usb_init_hw(struct zd_usb *usb)
894{
895 int r;
896 struct zd_chip *chip = zd_usb_to_chip(usb);
897
898 ZD_ASSERT(mutex_is_locked(&chip->mutex));
899 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
900 USB_REG((u16)FW_BASE_ADDR_OFFSET));
901 if (r)
902 return r;
903 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
904 usb->fw_base_offset);
905
906 return 0;
907}
908
909void zd_usb_clear(struct zd_usb *usb)
910{
911 usb_set_intfdata(usb->intf, NULL);
912 usb_put_intf(usb->intf);
c48cf125 913 ZD_MEMCLEAR(usb, sizeof(*usb));
e85d0918
DD		 914 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
915}
916
917static const char *speed(enum usb_device_speed speed)
918{
919 switch (speed) {
920 case USB_SPEED_LOW:
921 return "low";
922 case USB_SPEED_FULL:
923 return "full";
924 case USB_SPEED_HIGH:
925 return "high";
926 default:
927 return "unknown speed";
928 }
929}
930
931static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
932{
933 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
934 le16_to_cpu(udev->descriptor.idVendor),
935 le16_to_cpu(udev->descriptor.idProduct),
936 get_bcdDevice(udev),
937 speed(udev->speed));
938}
939
940int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
941{
942 struct usb_device *udev = interface_to_usbdev(usb->intf);
943 return scnprint_id(udev, buffer, size);
944}
945
946#ifdef DEBUG
947static void print_id(struct usb_device *udev)
948{
949 char buffer[40];
950
951 scnprint_id(udev, buffer, sizeof(buffer));
952 buffer[sizeof(buffer)-1] = 0;
953 dev_dbg_f(&udev->dev, "%s\n", buffer);
954}
955#else
956#define print_id(udev) do { } while (0)
957#endif
958
a1030e92
DD		 959static int eject_installer(struct usb_interface *intf)
960{
961 struct usb_device *udev = interface_to_usbdev(intf);
962 struct usb_host_interface *iface_desc = &intf->altsetting[0];
963 struct usb_endpoint_descriptor *endpoint;
964 unsigned char *cmd;
965 u8 bulk_out_ep;
966 int r;
967
968 /* Find bulk out endpoint */
969 endpoint = &iface_desc->endpoint[1].desc;
970 if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
971 (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
972 USB_ENDPOINT_XFER_BULK) {
973 bulk_out_ep = endpoint->bEndpointAddress;
974 } else {
975 dev_err(&udev->dev,
976 "zd1211rw: Could not find bulk out endpoint\n");
977 return -ENODEV;
978 }
979
980 cmd = kzalloc(31, GFP_KERNEL);
981 if (cmd == NULL)
982 return -ENODEV;
983
984 /* USB bulk command block */
985 cmd[0] = 0x55; /* bulk command signature */
986 cmd[1] = 0x53; /* bulk command signature */
987 cmd[2] = 0x42; /* bulk command signature */
988 cmd[3] = 0x43; /* bulk command signature */
989 cmd[14] = 6; /* command length */
990
991 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
992 cmd[19] = 0x2; /* eject disc */
993
994 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
995 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
996 cmd, 31, NULL, 2000);
997 kfree(cmd);
998 if (r)
999 return r;
1000
1001 /* At this point, the device disconnects and reconnects with the real
1002 * ID numbers. */
1003
1004 usb_set_intfdata(intf, NULL);
1005 return 0;
1006}
1007
e85d0918
DD		 1008static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1009{
1010 int r;
1011 struct usb_device *udev = interface_to_usbdev(intf);
1012 struct net_device *netdev = NULL;
1013
1014 print_id(udev);
1015
a1030e92
DD		 1016 if (id->driver_info & DEVICE_INSTALLER)
1017 return eject_installer(intf);
1018
e85d0918
DD		 1019 switch (udev->speed) {
1020 case USB_SPEED_LOW:
1021 case USB_SPEED_FULL:
1022 case USB_SPEED_HIGH:
1023 break;
1024 default:
1025 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1026 r = -ENODEV;
1027 goto error;
1028 }
1029
1030 netdev = zd_netdev_alloc(intf);
1031 if (netdev == NULL) {
1032 r = -ENOMEM;
1033 goto error;
1034 }
1035
1036 r = upload_firmware(udev, id->driver_info);
1037 if (r) {
1038 dev_err(&intf->dev,
1039 "couldn't load firmware. Error number %d\n", r);
1040 goto error;
1041 }
1042
1043 r = usb_reset_configuration(udev);
1044 if (r) {
1045 dev_dbg_f(&intf->dev,
1046 "couldn't reset configuration. Error number %d\n", r);
1047 goto error;
1048 }
1049
1050 /* At this point the interrupt endpoint is not generally enabled. We
1051 * save the USB bandwidth until the network device is opened. But
1052 * notify that the initialization of the MAC will require the
1053 * interrupts to be temporary enabled.
1054 */
1055 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
1056 if (r) {
1057 dev_dbg_f(&intf->dev,
1058 "couldn't initialize mac. Error number %d\n", r);
1059 goto error;
1060 }
1061
1062 r = register_netdev(netdev);
1063 if (r) {
1064 dev_dbg_f(&intf->dev,
1065 "couldn't register netdev. Error number %d\n", r);
1066 goto error;
1067 }
1068
1069 dev_dbg_f(&intf->dev, "successful\n");
1070 dev_info(&intf->dev,"%s\n", netdev->name);
1071 return 0;
1072error:
1073 usb_reset_device(interface_to_usbdev(intf));
1074 zd_netdev_free(netdev);
1075 return r;
1076}
1077
1078static void disconnect(struct usb_interface *intf)
1079{
1080 struct net_device *netdev = zd_intf_to_netdev(intf);
1081 struct zd_mac *mac = zd_netdev_mac(netdev);
1082 struct zd_usb *usb = &mac->chip.usb;
1083
a1030e92
DD		 1084 /* Either something really bad happened, or we're just dealing with
1085 * a DEVICE_INSTALLER. */
1086 if (netdev == NULL)
1087 return;
1088
e85d0918
DD		 1089 dev_dbg_f(zd_usb_dev(usb), "\n");
1090
1091 zd_netdev_disconnect(netdev);
1092
1093 /* Just in case something has gone wrong! */
1094 zd_usb_disable_rx(usb);
1095 zd_usb_disable_int(usb);
1096
1097 /* If the disconnect has been caused by a removal of the
1098 * driver module, the reset allows reloading of the driver. If the
1099 * reset will not be executed here, the upload of the firmware in the
1100 * probe function caused by the reloading of the driver will fail.
1101 */
1102 usb_reset_device(interface_to_usbdev(intf));
1103
e85d0918
DD		 1104 zd_netdev_free(netdev);
1105 dev_dbg(&intf->dev, "disconnected\n");
1106}
1107
1108static struct usb_driver driver = {
1109 .name = "zd1211rw",
1110 .id_table = usb_ids,
1111 .probe = probe,
1112 .disconnect = disconnect,
1113};
1114
1115static int __init usb_init(void)
1116{
1117 int r;
1118
1119 pr_debug("usb_init()\n");
1120
1121 r = usb_register(&driver);
1122 if (r) {
1123 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1124 return r;
1125 }
1126
1127 pr_debug("zd1211rw initialized\n");
1128 return 0;
1129}
1130
1131static void __exit usb_exit(void)
1132{
1133 pr_debug("usb_exit()\n");
1134 usb_deregister(&driver);
1135}
1136
1137module_init(usb_init);
1138module_exit(usb_exit);
1139
1140static int usb_int_regs_length(unsigned int count)
1141{
1142 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1143}
1144
1145static void prepare_read_regs_int(struct zd_usb *usb)
1146{
1147 struct zd_usb_interrupt *intr = &usb->intr;
1148
1149 spin_lock(&intr->lock);
1150 intr->read_regs_enabled = 1;
1151 INIT_COMPLETION(intr->read_regs.completion);
1152 spin_unlock(&intr->lock);
1153}
1154
1155static int get_results(struct zd_usb *usb, u16 *values,
1156 struct usb_req_read_regs *req, unsigned int count)
1157{
1158 int r;
1159 int i;
1160 struct zd_usb_interrupt *intr = &usb->intr;
1161 struct read_regs_int *rr = &intr->read_regs;
1162 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1163
1164 spin_lock(&intr->lock);
1165
1166 r = -EIO;
1167 /* The created block size seems to be larger than expected.
1168 * However results appear to be correct.
1169 */
1170 if (rr->length < usb_int_regs_length(count)) {
1171 dev_dbg_f(zd_usb_dev(usb),
1172 "error: actual length %d less than expected %d\n",
1173 rr->length, usb_int_regs_length(count));
1174 goto error_unlock;
1175 }
1176 if (rr->length > sizeof(rr->buffer)) {
1177 dev_dbg_f(zd_usb_dev(usb),
1178 "error: actual length %d exceeds buffer size %zu\n",
1179 rr->length, sizeof(rr->buffer));
1180 goto error_unlock;
1181 }
1182
1183 for (i = 0; i < count; i++) {
1184 struct reg_data *rd = &regs->regs[i];
1185 if (rd->addr != req->addr[i]) {
1186 dev_dbg_f(zd_usb_dev(usb),
1187 "rd[%d] addr %#06hx expected %#06hx\n", i,
1188 le16_to_cpu(rd->addr),
1189 le16_to_cpu(req->addr[i]));
1190 goto error_unlock;
1191 }
1192 values[i] = le16_to_cpu(rd->value);
1193 }
1194
1195 r = 0;
1196error_unlock:
1197 spin_unlock(&intr->lock);
1198 return r;
1199}
1200
1201int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1202 const zd_addr_t *addresses, unsigned int count)
1203{
1204 int r;
1205 int i, req_len, actual_req_len;
1206 struct usb_device *udev;
1207 struct usb_req_read_regs *req = NULL;
1208 unsigned long timeout;
1209
1210 if (count < 1) {
1211 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1212 return -EINVAL;
1213 }
1214 if (count > USB_MAX_IOREAD16_COUNT) {
1215 dev_dbg_f(zd_usb_dev(usb),
1216 "error: count %u exceeds possible max %u\n",
1217 count, USB_MAX_IOREAD16_COUNT);
1218 return -EINVAL;
1219 }
1220 if (in_atomic()) {
1221 dev_dbg_f(zd_usb_dev(usb),
1222 "error: io in atomic context not supported\n");
1223 return -EWOULDBLOCK;
1224 }
1225 if (!usb_int_enabled(usb)) {
1226 dev_dbg_f(zd_usb_dev(usb),
1227 "error: usb interrupt not enabled\n");
1228 return -EWOULDBLOCK;
1229 }
1230
1231 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1232 req = kmalloc(req_len, GFP_NOFS);
1233 if (!req)
1234 return -ENOMEM;
1235 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1236 for (i = 0; i < count; i++)
1237 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1238
1239 udev = zd_usb_to_usbdev(usb);
1240 prepare_read_regs_int(usb);
1241 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1242 req, req_len, &actual_req_len, 1000 /* ms */);
1243 if (r) {
1244 dev_dbg_f(zd_usb_dev(usb),
1245 "error in usb_bulk_msg(). Error number %d\n", r);
1246 goto error;
1247 }
1248 if (req_len != actual_req_len) {
1249 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1250 " req_len %d != actual_req_len %d\n",
1251 req_len, actual_req_len);
1252 r = -EIO;
1253 goto error;
1254 }
1255
1256 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1257 msecs_to_jiffies(1000));
1258 if (!timeout) {
1259 disable_read_regs_int(usb);
1260 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1261 r = -ETIMEDOUT;
1262 goto error;
1263 }
1264
1265 r = get_results(usb, values, req, count);
1266error:
1267 kfree(req);
1268 return r;
1269}
1270
1271int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1272 unsigned int count)
1273{
1274 int r;
1275 struct usb_device *udev;
1276 struct usb_req_write_regs *req = NULL;
1277 int i, req_len, actual_req_len;
1278
1279 if (count == 0)
1280 return 0;
1281 if (count > USB_MAX_IOWRITE16_COUNT) {
1282 dev_dbg_f(zd_usb_dev(usb),
1283 "error: count %u exceeds possible max %u\n",
1284 count, USB_MAX_IOWRITE16_COUNT);
1285 return -EINVAL;
1286 }
1287 if (in_atomic()) {
1288 dev_dbg_f(zd_usb_dev(usb),
1289 "error: io in atomic context not supported\n");
1290 return -EWOULDBLOCK;
1291 }
1292
1293 req_len = sizeof(struct usb_req_write_regs) +
1294 count * sizeof(struct reg_data);
1295 req = kmalloc(req_len, GFP_NOFS);
1296 if (!req)
1297 return -ENOMEM;
1298
1299 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1300 for (i = 0; i < count; i++) {
1301 struct reg_data *rw = &req->reg_writes[i];
1302 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1303 rw->value = cpu_to_le16(ioreqs[i].value);
1304 }
1305
1306 udev = zd_usb_to_usbdev(usb);
1307 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1308 req, req_len, &actual_req_len, 1000 /* ms */);
1309 if (r) {
1310 dev_dbg_f(zd_usb_dev(usb),
1311 "error in usb_bulk_msg(). Error number %d\n", r);
1312 goto error;
1313 }
1314 if (req_len != actual_req_len) {
1315 dev_dbg_f(zd_usb_dev(usb),
1316 "error in usb_bulk_msg()"
1317 " req_len %d != actual_req_len %d\n",
1318 req_len, actual_req_len);
1319 r = -EIO;
1320 goto error;
1321 }
1322
1323 /* FALL-THROUGH with r == 0 */
1324error:
1325 kfree(req);
1326 return r;
1327}
1328
1329int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1330{
1331 int r;
1332 struct usb_device *udev;
1333 struct usb_req_rfwrite *req = NULL;
1334 int i, req_len, actual_req_len;
1335 u16 bit_value_template;
1336
1337 if (in_atomic()) {
1338 dev_dbg_f(zd_usb_dev(usb),
1339 "error: io in atomic context not supported\n");
1340 return -EWOULDBLOCK;
1341 }
1342 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1343 dev_dbg_f(zd_usb_dev(usb),
1344 "error: bits %d are smaller than"
1345 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1346 bits, USB_MIN_RFWRITE_BIT_COUNT);
1347 return -EINVAL;
1348 }
1349 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1350 dev_dbg_f(zd_usb_dev(usb),
1351 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1352 bits, USB_MAX_RFWRITE_BIT_COUNT);
1353 return -EINVAL;
1354 }
1355#ifdef DEBUG
1356 if (value & (~0UL << bits)) {
1357 dev_dbg_f(zd_usb_dev(usb),
1358 "error: value %#09x has bits >= %d set\n",
1359 value, bits);
1360 return -EINVAL;
1361 }
1362#endif /* DEBUG */
1363
1364 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1365
1366 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1367 if (r) {
1368 dev_dbg_f(zd_usb_dev(usb),
1369 "error %d: Couldn't read CR203\n", r);
1370 goto out;
1371 }
1372 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1373
1374 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1375 req = kmalloc(req_len, GFP_NOFS);
1376 if (!req)
1377 return -ENOMEM;
1378
1379 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1380 /* 1: 3683a, but not used in ZYDAS driver */
1381 req->value = cpu_to_le16(2);
1382 req->bits = cpu_to_le16(bits);
1383
1384 for (i = 0; i < bits; i++) {
1385 u16 bv = bit_value_template;
1386 if (value & (1 << (bits-1-i)))
1387 bv |= RF_DATA;
1388 req->bit_values[i] = cpu_to_le16(bv);
1389 }
1390
1391 udev = zd_usb_to_usbdev(usb);
1392 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1393 req, req_len, &actual_req_len, 1000 /* ms */);
1394 if (r) {
1395 dev_dbg_f(zd_usb_dev(usb),
1396 "error in usb_bulk_msg(). Error number %d\n", r);
1397 goto out;
1398 }
1399 if (req_len != actual_req_len) {
1400 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1401 " req_len %d != actual_req_len %d\n",
1402 req_len, actual_req_len);
1403 r = -EIO;
1404 goto out;
1405 }
1406
1407 /* FALL-THROUGH with r == 0 */
1408out:
1409 kfree(req);
1410 return r;
1411}
Linux kernel - Deliverables
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