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