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zd1211rw: TrendNet TEW-509UB id added
[deliverable/linux.git] / drivers / net / wireless / zd1211rw / zd_usb.c
CommitLineData
66bb42fd
DD		 1/* ZD1211 USB-WLAN driver for Linux
2 *
3 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
4 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
5 * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
e85d0918
DD		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
d066c219 22#include <linux/kernel.h>
e85d0918 23#include <linux/init.h>
e85d0918
DD		 24#include <linux/firmware.h>
25#include <linux/device.h>
26#include <linux/errno.h>
5a0e3ad6 27#include <linux/slab.h>
e85d0918
DD		 28#include <linux/skbuff.h>
29#include <linux/usb.h>
bc5f06a8 30#include <linux/workqueue.h>
459c51ad 31#include <net/mac80211.h>
c248725b 32#include <asm/unaligned.h>
e85d0918
DD		 33
34#include "zd_def.h"
e85d0918
DD		 35#include "zd_mac.h"
36#include "zd_usb.h"
e85d0918
DD		 37
38static struct usb_device_id usb_ids[] = {
39 /* ZD1211 */
3bfbe80e
HTL		 40 { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
43 { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 },
44 { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
45 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
46 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
e85d0918 47 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
14990c69 48 { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 49 { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
50 { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
51 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
e85d0918 52 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
aa1d3a18 53 { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 54 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
55 { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 },
56 { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
f2423723 57 { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
8cecc90e 58 { USB_DEVICE(0x14ea, 0xab10), .driver_info = DEVICE_ZD1211 },
229782a3 59 { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
269fca0e 60 { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 61 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
62 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
9011cd25 63 { USB_DEVICE(0x157e, 0x3207), .driver_info = DEVICE_ZD1211 },
3bfbe80e
HTL		 64 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
65 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
e85d0918 66 /* ZD1211B */
3bfbe80e 67 { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
ad580db5 68 { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 69 { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
70 { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
71 { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
72 { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
8b339d05 73 { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 74 { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
75 { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
76 { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
77 { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
78 { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
dd2f5538 79 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 80 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B },
81 { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B },
82 { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
8f75e07a 83 { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B },
f72151fb 84 { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B },
9dfd5500 85 { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 86 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
87 { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B },
aec91028 88 { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
c445a31c 89 { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
8e97afe5 90 { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
de262496 91 { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B },
3bfbe80e
HTL		 92 { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
93 { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
94 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
95 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
96 { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
8cecc90e 97 { USB_DEVICE(0x2019, 0xed01), .driver_info = DEVICE_ZD1211B },
a1030e92
DD		 98 /* "Driverless" devices that need ejecting */
99 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
aa1d3a18 100 { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER },
e85d0918
DD		 101 {}
102};
103
104MODULE_LICENSE("GPL");
105MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
106MODULE_AUTHOR("Ulrich Kunitz");
107MODULE_AUTHOR("Daniel Drake");
108MODULE_VERSION("1.0");
109MODULE_DEVICE_TABLE(usb, usb_ids);
110
111#define FW_ZD1211_PREFIX "zd1211/zd1211_"
112#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
113
e85d0918 114/* USB device initialization */
72e77a8a 115static void int_urb_complete(struct urb *urb);
e85d0918
DD		 116
117static int request_fw_file(
118 const struct firmware **fw, const char *name, struct device *device)
119{
120 int r;
121
122 dev_dbg_f(device, "fw name %s\n", name);
123
124 r = request_firmware(fw, name, device);
125 if (r)
126 dev_err(device,
127 "Could not load firmware file %s. Error number %d\n",
128 name, r);
129 return r;
130}
131
132static inline u16 get_bcdDevice(const struct usb_device *udev)
133{
134 return le16_to_cpu(udev->descriptor.bcdDevice);
135}
136
137enum upload_code_flags {
138 REBOOT = 1,
139};
140
141/* Ensures that MAX_TRANSFER_SIZE is even. */
142#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
143
144static int upload_code(struct usb_device *udev,
145 const u8 *data, size_t size, u16 code_offset, int flags)
146{
147 u8 *p;
148 int r;
149
150 /* USB request blocks need "kmalloced" buffers.
151 */
152 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
153 if (!p) {
154 dev_err(&udev->dev, "out of memory\n");
155 r = -ENOMEM;
156 goto error;
157 }
158
159 size &= ~1;
160 while (size > 0) {
161 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
162 size : MAX_TRANSFER_SIZE;
163
164 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
165
166 memcpy(p, data, transfer_size);
167 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
168 USB_REQ_FIRMWARE_DOWNLOAD,
169 USB_DIR_OUT | USB_TYPE_VENDOR,
170 code_offset, 0, p, transfer_size, 1000 /* ms */);
171 if (r < 0) {
172 dev_err(&udev->dev,
173 "USB control request for firmware upload"
174 " failed. Error number %d\n", r);
175 goto error;
176 }
177 transfer_size = r & ~1;
178
179 size -= transfer_size;
180 data += transfer_size;
181 code_offset += transfer_size/sizeof(u16);
182 }
183
184 if (flags & REBOOT) {
185 u8 ret;
186
a8c4ea7a 187 /* Use "DMA-aware" buffer. */
e85d0918
DD		 188 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
189 USB_REQ_FIRMWARE_CONFIRM,
190 USB_DIR_IN | USB_TYPE_VENDOR,
a8c4ea7a 191 0, 0, p, sizeof(ret), 5000 /* ms */);
e85d0918
DD		 192 if (r != sizeof(ret)) {
193 dev_err(&udev->dev,
194 "control request firmeware confirmation failed."
195 " Return value %d\n", r);
196 if (r >= 0)
197 r = -ENODEV;
198 goto error;
199 }
a8c4ea7a 200 ret = p[0];
e85d0918
DD		 201 if (ret & 0x80) {
202 dev_err(&udev->dev,
203 "Internal error while downloading."
204 " Firmware confirm return value %#04x\n",
205 (unsigned int)ret);
206 r = -ENODEV;
207 goto error;
208 }
209 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
210 (unsigned int)ret);
211 }
212
213 r = 0;
214error:
215 kfree(p);
216 return r;
217}
218
219static u16 get_word(const void *data, u16 offset)
220{
221 const __le16 *p = data;
222 return le16_to_cpu(p[offset]);
223}
224
74553aed 225static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size,
e85d0918
DD		 226 const char* postfix)
227{
228 scnprintf(buffer, size, "%s%s",
74553aed 229 usb->is_zd1211b ?
e85d0918
DD		 230 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
231 postfix);
232 return buffer;
233}
234
74553aed 235static int handle_version_mismatch(struct zd_usb *usb,
d066c219
DD		 236 const struct firmware *ub_fw)
237{
74553aed 238 struct usb_device *udev = zd_usb_to_usbdev(usb);
d066c219
DD		 239 const struct firmware *ur_fw = NULL;
240 int offset;
241 int r = 0;
242 char fw_name[128];
243
244 r = request_fw_file(&ur_fw,
74553aed 245 get_fw_name(usb, fw_name, sizeof(fw_name), "ur"),
d066c219
DD		 246 &udev->dev);
247 if (r)
248 goto error;
249
ee302767 250 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
d066c219
DD		 251 if (r)
252 goto error;
253
ee302767 254 offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
d066c219 255 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
ee302767 256 E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
d066c219
DD		 257
258 /* At this point, the vendor driver downloads the whole firmware
259 * image, hacks around with version IDs, and uploads it again,
260 * completely overwriting the boot code. We do not do this here as
261 * it is not required on any tested devices, and it is suspected to
262 * cause problems. */
263error:
264 release_firmware(ur_fw);
265 return r;
266}
267
74553aed 268static int upload_firmware(struct zd_usb *usb)
e85d0918
DD		 269{
270 int r;
271 u16 fw_bcdDevice;
272 u16 bcdDevice;
74553aed 273 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918
DD		 274 const struct firmware *ub_fw = NULL;
275 const struct firmware *uph_fw = NULL;
276 char fw_name[128];
277
278 bcdDevice = get_bcdDevice(udev);
279
280 r = request_fw_file(&ub_fw,
74553aed 281 get_fw_name(usb, fw_name, sizeof(fw_name), "ub"),
e85d0918
DD		 282 &udev->dev);
283 if (r)
284 goto error;
285
ee302767 286 fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
e85d0918 287
e85d0918
DD		 288 if (fw_bcdDevice != bcdDevice) {
289 dev_info(&udev->dev,
d066c219
DD		 290 "firmware version %#06x and device bootcode version "
291 "%#06x differ\n", fw_bcdDevice, bcdDevice);
292 if (bcdDevice <= 0x4313)
293 dev_warn(&udev->dev, "device has old bootcode, please "
294 "report success or failure\n");
295
74553aed 296 r = handle_version_mismatch(usb, ub_fw);
d066c219
DD		 297 if (r)
298 goto error;
e85d0918
DD		 299 } else {
300 dev_dbg_f(&udev->dev,
301 "firmware device id %#06x is equal to the "
302 "actual device id\n", fw_bcdDevice);
303 }
304
305
306 r = request_fw_file(&uph_fw,
74553aed 307 get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"),
e85d0918
DD		 308 &udev->dev);
309 if (r)
310 goto error;
311
ee302767 312 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
e85d0918
DD		 313 if (r) {
314 dev_err(&udev->dev,
315 "Could not upload firmware code uph. Error number %d\n",
316 r);
317 }
318
319 /* FALL-THROUGH */
320error:
321 release_firmware(ub_fw);
322 release_firmware(uph_fw);
323 return r;
324}
325
3e8b4d00
BH		 326MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur");
327MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur");
328MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub");
329MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub");
330MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr");
331MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr");
332
74553aed
DD		 333/* Read data from device address space using "firmware interface" which does
334 * not require firmware to be loaded. */
335int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
336{
337 int r;
338 struct usb_device *udev = zd_usb_to_usbdev(usb);
a8c4ea7a 339 u8 *buf;
74553aed 340
a8c4ea7a
AN		 341 /* Use "DMA-aware" buffer. */
342 buf = kmalloc(len, GFP_KERNEL);
343 if (!buf)
344 return -ENOMEM;
74553aed
DD		 345 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
346 USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
a8c4ea7a 347 buf, len, 5000);
74553aed
DD		 348 if (r < 0) {
349 dev_err(&udev->dev,
350 "read over firmware interface failed: %d\n", r);
a8c4ea7a 351 goto exit;
74553aed
DD		 352 } else if (r != len) {
353 dev_err(&udev->dev,
354 "incomplete read over firmware interface: %d/%d\n",
355 r, len);
a8c4ea7a
AN		 356 r = -EIO;
357 goto exit;
74553aed 358 }
a8c4ea7a
AN		 359 r = 0;
360 memcpy(data, buf, len);
361exit:
362 kfree(buf);
363 return r;
74553aed
DD		 364}
365
e85d0918
DD		 366#define urb_dev(urb) (&(urb)->dev->dev)
367
368static inline void handle_regs_int(struct urb *urb)
369{
370 struct zd_usb *usb = urb->context;
371 struct zd_usb_interrupt *intr = &usb->intr;
372 int len;
72e77a8a 373 u16 int_num;
e85d0918
DD		 374
375 ZD_ASSERT(in_interrupt());
376 spin_lock(&intr->lock);
377
d63ddcec 378 int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
72e77a8a
LCC		 379 if (int_num == CR_INTERRUPT) {
380 struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
8b17f75c 381 spin_lock(&mac->lock);
72e77a8a
LCC		 382 memcpy(&mac->intr_buffer, urb->transfer_buffer,
383 USB_MAX_EP_INT_BUFFER);
8b17f75c 384 spin_unlock(&mac->lock);
72e77a8a
LCC		 385 schedule_work(&mac->process_intr);
386 } else if (intr->read_regs_enabled) {
e85d0918
DD		 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
e85d0918
DD		 397out:
398 spin_unlock(&intr->lock);
399}
400
7d12e780 401static void int_urb_complete(struct urb *urb)
e85d0918
DD		 402{
403 int r;
404 struct usb_int_header *hdr;
405
406 switch (urb->status) {
407 case 0:
408 break;
409 case -ESHUTDOWN:
410 case -EINVAL:
411 case -ENODEV:
412 case -ENOENT:
413 case -ECONNRESET:
e85d0918 414 case -EPIPE:
24d24c62 415 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
4a3b0874 416 return;
e85d0918 417 default:
24d24c62 418 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
e85d0918
DD		 419 goto resubmit;
420 }
421
422 if (urb->actual_length < sizeof(hdr)) {
423 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
424 goto resubmit;
425 }
426
427 hdr = urb->transfer_buffer;
428 if (hdr->type != USB_INT_TYPE) {
429 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
430 goto resubmit;
431 }
432
433 switch (hdr->id) {
434 case USB_INT_ID_REGS:
435 handle_regs_int(urb);
436 break;
437 case USB_INT_ID_RETRY_FAILED:
7f4013f0 438 zd_mac_tx_failed(urb);
e85d0918
DD		 439 break;
440 default:
441 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
442 (unsigned int)hdr->id);
443 goto resubmit;
444 }
445
446resubmit:
447 r = usb_submit_urb(urb, GFP_ATOMIC);
448 if (r) {
4a3b0874
JK		 449 dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n",
450 urb, r);
451 /* TODO: add worker to reset intr->urb */
e85d0918
DD		 452 }
453 return;
e85d0918
DD		 454}
455
456static inline int int_urb_interval(struct usb_device *udev)
457{
458 switch (udev->speed) {
459 case USB_SPEED_HIGH:
460 return 4;
461 case USB_SPEED_LOW:
462 return 10;
463 case USB_SPEED_FULL:
464 default:
465 return 1;
466 }
467}
468
469static inline int usb_int_enabled(struct zd_usb *usb)
470{
471 unsigned long flags;
472 struct zd_usb_interrupt *intr = &usb->intr;
473 struct urb *urb;
474
475 spin_lock_irqsave(&intr->lock, flags);
476 urb = intr->urb;
477 spin_unlock_irqrestore(&intr->lock, flags);
478 return urb != NULL;
479}
480
481int zd_usb_enable_int(struct zd_usb *usb)
482{
483 int r;
4a3b0874 484 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918 485 struct zd_usb_interrupt *intr = &usb->intr;
e85d0918
DD		 486 struct urb *urb;
487
488 dev_dbg_f(zd_usb_dev(usb), "\n");
489
35c3404e 490 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 491 if (!urb) {
492 r = -ENOMEM;
493 goto out;
494 }
495
496 ZD_ASSERT(!irqs_disabled());
497 spin_lock_irq(&intr->lock);
498 if (intr->urb) {
499 spin_unlock_irq(&intr->lock);
500 r = 0;
501 goto error_free_urb;
502 }
503 intr->urb = urb;
504 spin_unlock_irq(&intr->lock);
505
e85d0918 506 r = -ENOMEM;
4a3b0874
JK		 507 intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
508 GFP_KERNEL, &intr->buffer_dma);
509 if (!intr->buffer) {
e85d0918
DD		 510 dev_dbg_f(zd_usb_dev(usb),
511 "couldn't allocate transfer_buffer\n");
512 goto error_set_urb_null;
513 }
514
e85d0918 515 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
4a3b0874 516 intr->buffer, USB_MAX_EP_INT_BUFFER,
e85d0918
DD		 517 int_urb_complete, usb,
518 intr->interval);
4a3b0874
JK		 519 urb->transfer_dma = intr->buffer_dma;
520 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
e85d0918
DD		 521
522 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
35c3404e 523 r = usb_submit_urb(urb, GFP_KERNEL);
e85d0918
DD		 524 if (r) {
525 dev_dbg_f(zd_usb_dev(usb),
526 "Couldn't submit urb. Error number %d\n", r);
527 goto error;
528 }
529
530 return 0;
531error:
4a3b0874
JK		 532 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
533 intr->buffer, intr->buffer_dma);
e85d0918
DD		 534error_set_urb_null:
535 spin_lock_irq(&intr->lock);
536 intr->urb = NULL;
537 spin_unlock_irq(&intr->lock);
538error_free_urb:
539 usb_free_urb(urb);
540out:
541 return r;
542}
543
544void zd_usb_disable_int(struct zd_usb *usb)
545{
546 unsigned long flags;
4a3b0874 547 struct usb_device *udev = zd_usb_to_usbdev(usb);
e85d0918
DD		 548 struct zd_usb_interrupt *intr = &usb->intr;
549 struct urb *urb;
4a3b0874
JK		 550 void *buffer;
551 dma_addr_t buffer_dma;
e85d0918
DD		 552
553 spin_lock_irqsave(&intr->lock, flags);
554 urb = intr->urb;
555 if (!urb) {
556 spin_unlock_irqrestore(&intr->lock, flags);
557 return;
558 }
559 intr->urb = NULL;
4a3b0874
JK		 560 buffer = intr->buffer;
561 buffer_dma = intr->buffer_dma;
562 intr->buffer = NULL;
e85d0918
DD		 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);
4a3b0874
JK		 568
569 if (buffer)
570 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
571 buffer, buffer_dma);
e85d0918
DD		 572}
573
574static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
575 unsigned int length)
576{
577 int i;
e85d0918
DD		 578 const struct rx_length_info *length_info;
579
580 if (length < sizeof(struct rx_length_info)) {
581 /* It's not a complete packet anyhow. */
7f4013f0
BP		 582 printk("%s: invalid, small RX packet : %d\n",
583 __func__, length);
e85d0918
DD		 584 return;
585 }
586 length_info = (struct rx_length_info *)
587 (buffer + length - sizeof(struct rx_length_info));
588
589 /* It might be that three frames are merged into a single URB
590 * transaction. We have to check for the length info tag.
591 *
592 * While testing we discovered that length_info might be unaligned,
593 * because if USB transactions are merged, the last packet will not
594 * be padded. Unaligned access might also happen if the length_info
595 * structure is not present.
596 */
533dd1b0 597 if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
b269825b 598 {
e85d0918
DD		 599 unsigned int l, k, n;
600 for (i = 0, l = 0;; i++) {
533dd1b0 601 k = get_unaligned_le16(&length_info->length[i]);
850c211c
UK		 602 if (k == 0)
603 return;
e85d0918
DD		 604 n = l+k;
605 if (n > length)
606 return;
459c51ad 607 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
e85d0918
DD		 608 if (i >= 2)
609 return;
610 l = (n+3) & ~3;
611 }
612 } else {
459c51ad 613 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
e85d0918
DD		 614 }
615}
616
7d12e780 617static void rx_urb_complete(struct urb *urb)
e85d0918 618{
24d24c62 619 int r;
e85d0918
DD		 620 struct zd_usb *usb;
621 struct zd_usb_rx *rx;
622 const u8 *buffer;
623 unsigned int length;
624
625 switch (urb->status) {
626 case 0:
627 break;
628 case -ESHUTDOWN:
629 case -EINVAL:
630 case -ENODEV:
631 case -ENOENT:
632 case -ECONNRESET:
e85d0918 633 case -EPIPE:
24d24c62 634 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
b312d799 635 return;
e85d0918
DD		 636 default:
637 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
638 goto resubmit;
639 }
640
641 buffer = urb->transfer_buffer;
642 length = urb->actual_length;
643 usb = urb->context;
644 rx = &usb->rx;
645
1f6ccccc
JK		 646 zd_usb_reset_rx_idle_timer(usb);
647
e85d0918
DD		 648 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
649 /* If there is an old first fragment, we don't care. */
650 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
651 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
652 spin_lock(&rx->lock);
653 memcpy(rx->fragment, buffer, length);
654 rx->fragment_length = length;
655 spin_unlock(&rx->lock);
656 goto resubmit;
657 }
658
659 spin_lock(&rx->lock);
660 if (rx->fragment_length > 0) {
661 /* We are on a second fragment, we believe */
662 ZD_ASSERT(length + rx->fragment_length <=
663 ARRAY_SIZE(rx->fragment));
664 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
665 memcpy(rx->fragment+rx->fragment_length, buffer, length);
666 handle_rx_packet(usb, rx->fragment,
667 rx->fragment_length + length);
668 rx->fragment_length = 0;
669 spin_unlock(&rx->lock);
670 } else {
671 spin_unlock(&rx->lock);
672 handle_rx_packet(usb, buffer, length);
673 }
674
675resubmit:
24d24c62
JK		 676 r = usb_submit_urb(urb, GFP_ATOMIC);
677 if (r)
678 dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r);
e85d0918
DD		 679}
680
459c51ad 681static struct urb *alloc_rx_urb(struct zd_usb *usb)
e85d0918
DD		 682{
683 struct usb_device *udev = zd_usb_to_usbdev(usb);
684 struct urb *urb;
685 void *buffer;
686
35c3404e 687 urb = usb_alloc_urb(0, GFP_KERNEL);
e85d0918
DD		 688 if (!urb)
689 return NULL;
997ea58e
DM		 690 buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
691 &urb->transfer_dma);
e85d0918
DD		 692 if (!buffer) {
693 usb_free_urb(urb);
694 return NULL;
695 }
696
697 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
997ea58e 698 buffer, USB_MAX_RX_SIZE,
e85d0918
DD		 699 rx_urb_complete, usb);
700 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
701
702 return urb;
703}
704
459c51ad 705static void free_rx_urb(struct urb *urb)
e85d0918
DD		 706{
707 if (!urb)
708 return;
997ea58e
DM		 709 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
710 urb->transfer_buffer, urb->transfer_dma);
e85d0918
DD		 711 usb_free_urb(urb);
712}
713
1f6ccccc 714static int __zd_usb_enable_rx(struct zd_usb *usb)
e85d0918
DD		 715{
716 int i, r;
717 struct zd_usb_rx *rx = &usb->rx;
718 struct urb **urbs;
719
720 dev_dbg_f(zd_usb_dev(usb), "\n");
721
722 r = -ENOMEM;
459c51ad 723 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
e85d0918
DD		 724 if (!urbs)
725 goto error;
459c51ad
DD		 726 for (i = 0; i < RX_URBS_COUNT; i++) {
727 urbs[i] = alloc_rx_urb(usb);
e85d0918
DD		 728 if (!urbs[i])
729 goto error;
730 }
731
732 ZD_ASSERT(!irqs_disabled());
733 spin_lock_irq(&rx->lock);
734 if (rx->urbs) {
735 spin_unlock_irq(&rx->lock);
736 r = 0;
737 goto error;
738 }
739 rx->urbs = urbs;
459c51ad 740 rx->urbs_count = RX_URBS_COUNT;
e85d0918
DD		 741 spin_unlock_irq(&rx->lock);
742
459c51ad 743 for (i = 0; i < RX_URBS_COUNT; i++) {
35c3404e 744 r = usb_submit_urb(urbs[i], GFP_KERNEL);
e85d0918
DD		 745 if (r)
746 goto error_submit;
747 }
748
749 return 0;
750error_submit:
459c51ad 751 for (i = 0; i < RX_URBS_COUNT; i++) {
e85d0918
DD		 752 usb_kill_urb(urbs[i]);
753 }
754 spin_lock_irq(&rx->lock);
755 rx->urbs = NULL;
756 rx->urbs_count = 0;
757 spin_unlock_irq(&rx->lock);
758error:
759 if (urbs) {
459c51ad
DD		 760 for (i = 0; i < RX_URBS_COUNT; i++)
761 free_rx_urb(urbs[i]);
e85d0918
DD		 762 }
763 return r;
764}
765
1f6ccccc
JK		 766int zd_usb_enable_rx(struct zd_usb *usb)
767{
768 int r;
769 struct zd_usb_rx *rx = &usb->rx;
770
771 mutex_lock(&rx->setup_mutex);
772 r = __zd_usb_enable_rx(usb);
773 mutex_unlock(&rx->setup_mutex);
774
775 zd_usb_reset_rx_idle_timer(usb);
776
777 return r;
778}
779
780static void __zd_usb_disable_rx(struct zd_usb *usb)
e85d0918
DD		 781{
782 int i;
783 unsigned long flags;
784 struct urb **urbs;
785 unsigned int count;
786 struct zd_usb_rx *rx = &usb->rx;
787
788 spin_lock_irqsave(&rx->lock, flags);
789 urbs = rx->urbs;
790 count = rx->urbs_count;
791 spin_unlock_irqrestore(&rx->lock, flags);
792 if (!urbs)
793 return;
794
795 for (i = 0; i < count; i++) {
796 usb_kill_urb(urbs[i]);
459c51ad 797 free_rx_urb(urbs[i]);
e85d0918
DD		 798 }
799 kfree(urbs);
800
801 spin_lock_irqsave(&rx->lock, flags);
802 rx->urbs = NULL;
803 rx->urbs_count = 0;
804 spin_unlock_irqrestore(&rx->lock, flags);
805}
806
1f6ccccc
JK		 807void zd_usb_disable_rx(struct zd_usb *usb)
808{
809 struct zd_usb_rx *rx = &usb->rx;
810
811 mutex_lock(&rx->setup_mutex);
812 __zd_usb_disable_rx(usb);
813 mutex_unlock(&rx->setup_mutex);
814
815 cancel_delayed_work_sync(&rx->idle_work);
816}
817
818static void zd_usb_reset_rx(struct zd_usb *usb)
819{
820 bool do_reset;
821 struct zd_usb_rx *rx = &usb->rx;
822 unsigned long flags;
823
824 mutex_lock(&rx->setup_mutex);
825
826 spin_lock_irqsave(&rx->lock, flags);
827 do_reset = rx->urbs != NULL;
828 spin_unlock_irqrestore(&rx->lock, flags);
829
830 if (do_reset) {
831 __zd_usb_disable_rx(usb);
832 __zd_usb_enable_rx(usb);
833 }
834
835 mutex_unlock(&rx->setup_mutex);
836
837 if (do_reset)
838 zd_usb_reset_rx_idle_timer(usb);
839}
840
459c51ad
DD		 841/**
842 * zd_usb_disable_tx - disable transmission
843 * @usb: the zd1211rw-private USB structure
844 *
845 * Frees all URBs in the free list and marks the transmission as disabled.
846 */
847void zd_usb_disable_tx(struct zd_usb *usb)
848{
849 struct zd_usb_tx *tx = &usb->tx;
850 unsigned long flags;
78fc800f
JK		 851
852 atomic_set(&tx->enabled, 0);
853
854 /* kill all submitted tx-urbs */
855 usb_kill_anchored_urbs(&tx->submitted);
459c51ad
DD		 856
857 spin_lock_irqsave(&tx->lock, flags);
a0fd751f 858 WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
78fc800f 859 WARN_ON(tx->submitted_urbs != 0);
459c51ad 860 tx->submitted_urbs = 0;
78fc800f
JK		 861 spin_unlock_irqrestore(&tx->lock, flags);
862
459c51ad
DD		 863 /* The stopped state is ignored, relying on ieee80211_wake_queues()
864 * in a potentionally following zd_usb_enable_tx().
865 */
459c51ad
DD		 866}
867
868/**
869 * zd_usb_enable_tx - enables transmission
870 * @usb: a &struct zd_usb pointer
871 *
872 * This function enables transmission and prepares the &zd_usb_tx data
873 * structure.
874 */
875void zd_usb_enable_tx(struct zd_usb *usb)
876{
877 unsigned long flags;
878 struct zd_usb_tx *tx = &usb->tx;
879
880 spin_lock_irqsave(&tx->lock, flags);
78fc800f 881 atomic_set(&tx->enabled, 1);
459c51ad
DD		 882 tx->submitted_urbs = 0;
883 ieee80211_wake_queues(zd_usb_to_hw(usb));
884 tx->stopped = 0;
885 spin_unlock_irqrestore(&tx->lock, flags);
886}
887
459c51ad
DD		 888static void tx_dec_submitted_urbs(struct zd_usb *usb)
889{
890 struct zd_usb_tx *tx = &usb->tx;
891 unsigned long flags;
892
893 spin_lock_irqsave(&tx->lock, flags);
894 --tx->submitted_urbs;
895 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
896 ieee80211_wake_queues(zd_usb_to_hw(usb));
897 tx->stopped = 0;
898 }
899 spin_unlock_irqrestore(&tx->lock, flags);
900}
901
902static void tx_inc_submitted_urbs(struct zd_usb *usb)
903{
904 struct zd_usb_tx *tx = &usb->tx;
905 unsigned long flags;
906
907 spin_lock_irqsave(&tx->lock, flags);
908 ++tx->submitted_urbs;
909 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
910 ieee80211_stop_queues(zd_usb_to_hw(usb));
911 tx->stopped = 1;
912 }
913 spin_unlock_irqrestore(&tx->lock, flags);
914}
915
916/**
917 * tx_urb_complete - completes the execution of an URB
918 * @urb: a URB
919 *
920 * This function is called if the URB has been transferred to a device or an
921 * error has happened.
922 */
7d12e780 923static void tx_urb_complete(struct urb *urb)
e85d0918
DD		 924{
925 int r;
459c51ad 926 struct sk_buff *skb;
e039fa4a 927 struct ieee80211_tx_info *info;
459c51ad 928 struct zd_usb *usb;
78fc800f
JK		 929 struct zd_usb_tx *tx;
930
931 skb = (struct sk_buff *)urb->context;
932 info = IEEE80211_SKB_CB(skb);
933 /*
934 * grab 'usb' pointer before handing off the skb (since
935 * it might be freed by zd_mac_tx_to_dev or mac80211)
936 */
937 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
938 tx = &usb->tx;
e85d0918
DD		 939
940 switch (urb->status) {
941 case 0:
942 break;
943 case -ESHUTDOWN:
944 case -EINVAL:
945 case -ENODEV:
946 case -ENOENT:
947 case -ECONNRESET:
b312d799 948 case -EPIPE:
e85d0918
DD		 949 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
950 break;
e85d0918
DD		 951 default:
952 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
953 goto resubmit;
954 }
955free_urb:
a0fd751f 956 skb_unlink(skb, &usb->tx.submitted_skbs);
dbabad0c 957 zd_mac_tx_to_dev(skb, urb->status);
78fc800f 958 usb_free_urb(urb);
459c51ad 959 tx_dec_submitted_urbs(usb);
e85d0918
DD		 960 return;
961resubmit:
78fc800f 962 usb_anchor_urb(urb, &tx->submitted);
e85d0918
DD		 963 r = usb_submit_urb(urb, GFP_ATOMIC);
964 if (r) {
78fc800f 965 usb_unanchor_urb(urb);
e85d0918
DD		 966 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
967 goto free_urb;
968 }
969}
970
459c51ad
DD		 971/**
972 * zd_usb_tx: initiates transfer of a frame of the device
973 *
974 * @usb: the zd1211rw-private USB structure
975 * @skb: a &struct sk_buff pointer
976 *
977 * This function tranmits a frame to the device. It doesn't wait for
978 * completion. The frame must contain the control set and have all the
979 * control set information available.
980 *
981 * The function returns 0 if the transfer has been successfully initiated.
e85d0918 982 */
459c51ad 983int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
e85d0918
DD		 984{
985 int r;
a0fd751f 986 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e85d0918
DD		 987 struct usb_device *udev = zd_usb_to_usbdev(usb);
988 struct urb *urb;
78fc800f 989 struct zd_usb_tx *tx = &usb->tx;
e85d0918 990
78fc800f
JK		 991 if (!atomic_read(&tx->enabled)) {
992 r = -ENOENT;
993 goto out;
994 }
995
996 urb = usb_alloc_urb(0, GFP_ATOMIC);
e85d0918
DD		 997 if (!urb) {
998 r = -ENOMEM;
999 goto out;
1000 }
1001
e85d0918 1002 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
459c51ad 1003 skb->data, skb->len, tx_urb_complete, skb);
e85d0918 1004
a0fd751f
JK		 1005 info->rate_driver_data[1] = (void *)jiffies;
1006 skb_queue_tail(&tx->submitted_skbs, skb);
78fc800f 1007 usb_anchor_urb(urb, &tx->submitted);
a0fd751f 1008
e85d0918 1009 r = usb_submit_urb(urb, GFP_ATOMIC);
78fc800f 1010 if (r) {
24d24c62 1011 dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r);
78fc800f 1012 usb_unanchor_urb(urb);
a0fd751f 1013 skb_unlink(skb, &tx->submitted_skbs);
e85d0918 1014 goto error;
78fc800f 1015 }
459c51ad 1016 tx_inc_submitted_urbs(usb);
e85d0918
DD		 1017 return 0;
1018error:
78fc800f 1019 usb_free_urb(urb);
e85d0918
DD		 1020out:
1021 return r;
1022}
1023
a0fd751f
JK		 1024static bool zd_tx_timeout(struct zd_usb *usb)
1025{
1026 struct zd_usb_tx *tx = &usb->tx;
1027 struct sk_buff_head *q = &tx->submitted_skbs;
1028 struct sk_buff *skb, *skbnext;
1029 struct ieee80211_tx_info *info;
1030 unsigned long flags, trans_start;
1031 bool have_timedout = false;
1032
1033 spin_lock_irqsave(&q->lock, flags);
1034 skb_queue_walk_safe(q, skb, skbnext) {
1035 info = IEEE80211_SKB_CB(skb);
1036 trans_start = (unsigned long)info->rate_driver_data[1];
1037
1038 if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
1039 have_timedout = true;
1040 break;
1041 }
1042 }
1043 spin_unlock_irqrestore(&q->lock, flags);
1044
1045 return have_timedout;
1046}
1047
1048static void zd_tx_watchdog_handler(struct work_struct *work)
1049{
1050 struct zd_usb *usb =
1051 container_of(work, struct zd_usb, tx.watchdog_work.work);
1052 struct zd_usb_tx *tx = &usb->tx;
1053
1054 if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
1055 goto out;
1056 if (!zd_tx_timeout(usb))
1057 goto out;
1058
1059 /* TX halted, try reset */
1060 dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device...");
1061
1062 usb_queue_reset_device(usb->intf);
1063
1064 /* reset will stop this worker, don't rearm */
1065 return;
1066out:
1067 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1068 ZD_TX_WATCHDOG_INTERVAL);
1069}
1070
1071void zd_tx_watchdog_enable(struct zd_usb *usb)
1072{
1073 struct zd_usb_tx *tx = &usb->tx;
1074
1075 if (!tx->watchdog_enabled) {
1076 dev_dbg_f(zd_usb_dev(usb), "\n");
1077 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1078 ZD_TX_WATCHDOG_INTERVAL);
1079 tx->watchdog_enabled = 1;
1080 }
1081}
1082
1083void zd_tx_watchdog_disable(struct zd_usb *usb)
1084{
1085 struct zd_usb_tx *tx = &usb->tx;
1086
1087 if (tx->watchdog_enabled) {
1088 dev_dbg_f(zd_usb_dev(usb), "\n");
1089 tx->watchdog_enabled = 0;
1090 cancel_delayed_work_sync(&tx->watchdog_work);
1091 }
1092}
1093
1f6ccccc
JK		 1094static void zd_rx_idle_timer_handler(struct work_struct *work)
1095{
1096 struct zd_usb *usb =
1097 container_of(work, struct zd_usb, rx.idle_work.work);
1098 struct zd_mac *mac = zd_usb_to_mac(usb);
1099
1100 if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
1101 return;
1102
1103 dev_dbg_f(zd_usb_dev(usb), "\n");
1104
1105 /* 30 seconds since last rx, reset rx */
1106 zd_usb_reset_rx(usb);
1107}
1108
1109void zd_usb_reset_rx_idle_timer(struct zd_usb *usb)
1110{
1111 struct zd_usb_rx *rx = &usb->rx;
1112
1113 cancel_delayed_work(&rx->idle_work);
1114 queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
1115}
1116
e85d0918
DD		 1117static inline void init_usb_interrupt(struct zd_usb *usb)
1118{
1119 struct zd_usb_interrupt *intr = &usb->intr;
1120
1121 spin_lock_init(&intr->lock);
1122 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
1123 init_completion(&intr->read_regs.completion);
0ce34bc8 1124 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
e85d0918
DD		 1125}
1126
1127static inline void init_usb_rx(struct zd_usb *usb)
1128{
1129 struct zd_usb_rx *rx = &usb->rx;
1130 spin_lock_init(&rx->lock);
1f6ccccc 1131 mutex_init(&rx->setup_mutex);
e85d0918
DD		 1132 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
1133 rx->usb_packet_size = 512;
1134 } else {
1135 rx->usb_packet_size = 64;
1136 }
1137 ZD_ASSERT(rx->fragment_length == 0);
1f6ccccc 1138 INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler);
e85d0918
DD		 1139}
1140
1141static inline void init_usb_tx(struct zd_usb *usb)
1142{
459c51ad
DD		 1143 struct zd_usb_tx *tx = &usb->tx;
1144 spin_lock_init(&tx->lock);
78fc800f 1145 atomic_set(&tx->enabled, 0);
459c51ad 1146 tx->stopped = 0;
a0fd751f 1147 skb_queue_head_init(&tx->submitted_skbs);
78fc800f 1148 init_usb_anchor(&tx->submitted);
459c51ad 1149 tx->submitted_urbs = 0;
a0fd751f
JK		 1150 tx->watchdog_enabled = 0;
1151 INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
e85d0918
DD		 1152}
1153
459c51ad 1154void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
e85d0918
DD		 1155 struct usb_interface *intf)
1156{
1157 memset(usb, 0, sizeof(*usb));
1158 usb->intf = usb_get_intf(intf);
459c51ad 1159 usb_set_intfdata(usb->intf, hw);
eefdbec1 1160 init_usb_anchor(&usb->submitted_cmds);
e85d0918
DD		 1161 init_usb_interrupt(usb);
1162 init_usb_tx(usb);
1163 init_usb_rx(usb);
1164}
1165
e85d0918
DD		 1166void zd_usb_clear(struct zd_usb *usb)
1167{
1168 usb_set_intfdata(usb->intf, NULL);
1169 usb_put_intf(usb->intf);
c48cf125 1170 ZD_MEMCLEAR(usb, sizeof(*usb));
e85d0918
DD		 1171 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1172}
1173
1174static const char *speed(enum usb_device_speed speed)
1175{
1176 switch (speed) {
1177 case USB_SPEED_LOW:
1178 return "low";
1179 case USB_SPEED_FULL:
1180 return "full";
1181 case USB_SPEED_HIGH:
1182 return "high";
1183 default:
1184 return "unknown speed";
1185 }
1186}
1187
1188static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1189{
1190 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1191 le16_to_cpu(udev->descriptor.idVendor),
1192 le16_to_cpu(udev->descriptor.idProduct),
1193 get_bcdDevice(udev),
1194 speed(udev->speed));
1195}
1196
1197int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1198{
1199 struct usb_device *udev = interface_to_usbdev(usb->intf);
1200 return scnprint_id(udev, buffer, size);
1201}
1202
1203#ifdef DEBUG
1204static void print_id(struct usb_device *udev)
1205{
1206 char buffer[40];
1207
1208 scnprint_id(udev, buffer, sizeof(buffer));
1209 buffer[sizeof(buffer)-1] = 0;
1210 dev_dbg_f(&udev->dev, "%s\n", buffer);
1211}
1212#else
1213#define print_id(udev) do { } while (0)
1214#endif
1215
a1030e92
DD		 1216static int eject_installer(struct usb_interface *intf)
1217{
1218 struct usb_device *udev = interface_to_usbdev(intf);
1219 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1220 struct usb_endpoint_descriptor *endpoint;
1221 unsigned char *cmd;
1222 u8 bulk_out_ep;
1223 int r;
1224
1225 /* Find bulk out endpoint */
11466f13
SS		 1226 for (r = 1; r >= 0; r--) {
1227 endpoint = &iface_desc->endpoint[r].desc;
1228 if (usb_endpoint_dir_out(endpoint) &&
1229 usb_endpoint_xfer_bulk(endpoint)) {
1230 bulk_out_ep = endpoint->bEndpointAddress;
1231 break;
1232 }
1233 }
1234 if (r == -1) {
a1030e92
DD		 1235 dev_err(&udev->dev,
1236 "zd1211rw: Could not find bulk out endpoint\n");
1237 return -ENODEV;
1238 }
1239
1240 cmd = kzalloc(31, GFP_KERNEL);
1241 if (cmd == NULL)
1242 return -ENODEV;
1243
1244 /* USB bulk command block */
1245 cmd[0] = 0x55; /* bulk command signature */
1246 cmd[1] = 0x53; /* bulk command signature */
1247 cmd[2] = 0x42; /* bulk command signature */
1248 cmd[3] = 0x43; /* bulk command signature */
1249 cmd[14] = 6; /* command length */
1250
1251 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1252 cmd[19] = 0x2; /* eject disc */
1253
1254 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1255 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1256 cmd, 31, NULL, 2000);
1257 kfree(cmd);
1258 if (r)
1259 return r;
1260
1261 /* At this point, the device disconnects and reconnects with the real
1262 * ID numbers. */
1263
1264 usb_set_intfdata(intf, NULL);
1265 return 0;
1266}
1267
74553aed
DD		 1268int zd_usb_init_hw(struct zd_usb *usb)
1269{
1270 int r;
1271 struct zd_mac *mac = zd_usb_to_mac(usb);
1272
1273 dev_dbg_f(zd_usb_dev(usb), "\n");
1274
1275 r = upload_firmware(usb);
1276 if (r) {
1277 dev_err(zd_usb_dev(usb),
1278 "couldn't load firmware. Error number %d\n", r);
1279 return r;
1280 }
1281
1282 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1283 if (r) {
1284 dev_dbg_f(zd_usb_dev(usb),
1285 "couldn't reset configuration. Error number %d\n", r);
1286 return r;
1287 }
1288
459c51ad 1289 r = zd_mac_init_hw(mac->hw);
74553aed
DD		 1290 if (r) {
1291 dev_dbg_f(zd_usb_dev(usb),
1292 "couldn't initialize mac. Error number %d\n", r);
1293 return r;
1294 }
1295
1296 usb->initialized = 1;
1297 return 0;
1298}
1299
e85d0918
DD		 1300static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1301{
1302 int r;
1303 struct usb_device *udev = interface_to_usbdev(intf);
459c51ad
DD		 1304 struct zd_usb *usb;
1305 struct ieee80211_hw *hw = NULL;
e85d0918
DD		 1306
1307 print_id(udev);
1308
a1030e92
DD		 1309 if (id->driver_info & DEVICE_INSTALLER)
1310 return eject_installer(intf);
1311
e85d0918
DD		 1312 switch (udev->speed) {
1313 case USB_SPEED_LOW:
1314 case USB_SPEED_FULL:
1315 case USB_SPEED_HIGH:
1316 break;
1317 default:
1318 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1319 r = -ENODEV;
1320 goto error;
1321 }
1322
459c51ad
DD		 1323 r = usb_reset_device(udev);
1324 if (r) {
1325 dev_err(&intf->dev,
1326 "couldn't reset usb device. Error number %d\n", r);
1327 goto error;
1328 }
6e3632f6 1329
459c51ad
DD		 1330 hw = zd_mac_alloc_hw(intf);
1331 if (hw == NULL) {
e85d0918
DD		 1332 r = -ENOMEM;
1333 goto error;
1334 }
1335
459c51ad 1336 usb = &zd_hw_mac(hw)->chip.usb;
74553aed 1337 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
e85d0918 1338
459c51ad 1339 r = zd_mac_preinit_hw(hw);
e85d0918
DD		 1340 if (r) {
1341 dev_dbg_f(&intf->dev,
1342 "couldn't initialize mac. Error number %d\n", r);
1343 goto error;
1344 }
1345
459c51ad 1346 r = ieee80211_register_hw(hw);
e85d0918
DD		 1347 if (r) {
1348 dev_dbg_f(&intf->dev,
459c51ad 1349 "couldn't register device. Error number %d\n", r);
e85d0918
DD		 1350 goto error;
1351 }
1352
1353 dev_dbg_f(&intf->dev, "successful\n");
459c51ad 1354 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
e85d0918
DD		 1355 return 0;
1356error:
1357 usb_reset_device(interface_to_usbdev(intf));
459c51ad
DD		 1358 if (hw) {
1359 zd_mac_clear(zd_hw_mac(hw));
1360 ieee80211_free_hw(hw);
1361 }
e85d0918
DD		 1362 return r;
1363}
1364
1365static void disconnect(struct usb_interface *intf)
1366{
459c51ad 1367 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
e0579d57
MP		 1368 struct zd_mac *mac;
1369 struct zd_usb *usb;
e85d0918 1370
a1030e92
DD		 1371 /* Either something really bad happened, or we're just dealing with
1372 * a DEVICE_INSTALLER. */
459c51ad 1373 if (hw == NULL)
a1030e92
DD		 1374 return;
1375
459c51ad 1376 mac = zd_hw_mac(hw);
e0579d57
MP		 1377 usb = &mac->chip.usb;
1378
e85d0918
DD		 1379 dev_dbg_f(zd_usb_dev(usb), "\n");
1380
459c51ad 1381 ieee80211_unregister_hw(hw);
e85d0918
DD		 1382
1383 /* Just in case something has gone wrong! */
78fc800f 1384 zd_usb_disable_tx(usb);
e85d0918
DD		 1385 zd_usb_disable_rx(usb);
1386 zd_usb_disable_int(usb);
1387
1388 /* If the disconnect has been caused by a removal of the
1389 * driver module, the reset allows reloading of the driver. If the
1390 * reset will not be executed here, the upload of the firmware in the
1391 * probe function caused by the reloading of the driver will fail.
1392 */
1393 usb_reset_device(interface_to_usbdev(intf));
1394
459c51ad
DD		 1395 zd_mac_clear(mac);
1396 ieee80211_free_hw(hw);
e85d0918
DD		 1397 dev_dbg(&intf->dev, "disconnected\n");
1398}
1399
a0fd751f
JK		 1400static void zd_usb_resume(struct zd_usb *usb)
1401{
1402 struct zd_mac *mac = zd_usb_to_mac(usb);
1403 int r;
1404
1405 dev_dbg_f(zd_usb_dev(usb), "\n");
1406
1407 r = zd_op_start(zd_usb_to_hw(usb));
1408 if (r < 0) {
1409 dev_warn(zd_usb_dev(usb), "Device resume failed "
1410 "with error code %d. Retrying...\n", r);
1411 if (usb->was_running)
1412 set_bit(ZD_DEVICE_RUNNING, &mac->flags);
1413 usb_queue_reset_device(usb->intf);
1414 return;
1415 }
1416
1417 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
1418 r = zd_restore_settings(mac);
1419 if (r < 0) {
1420 dev_dbg(zd_usb_dev(usb),
1421 "failed to restore settings, %d\n", r);
1422 return;
1423 }
1424 }
1425}
1426
1427static void zd_usb_stop(struct zd_usb *usb)
1428{
1429 dev_dbg_f(zd_usb_dev(usb), "\n");
1430
1431 zd_op_stop(zd_usb_to_hw(usb));
1432
1433 zd_usb_disable_tx(usb);
1434 zd_usb_disable_rx(usb);
1435 zd_usb_disable_int(usb);
1436
1437 usb->initialized = 0;
1438}
1439
1440static int pre_reset(struct usb_interface *intf)
1441{
1442 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1443 struct zd_mac *mac;
1444 struct zd_usb *usb;
1445
1446 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1447 return 0;
1448
1449 mac = zd_hw_mac(hw);
1450 usb = &mac->chip.usb;
1451
1452 usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
1453
1454 zd_usb_stop(usb);
1455
1456 mutex_lock(&mac->chip.mutex);
1457 return 0;
1458}
1459
1460static int post_reset(struct usb_interface *intf)
1461{
1462 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1463 struct zd_mac *mac;
1464 struct zd_usb *usb;
1465
1466 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1467 return 0;
1468
1469 mac = zd_hw_mac(hw);
1470 usb = &mac->chip.usb;
1471
1472 mutex_unlock(&mac->chip.mutex);
1473
1474 if (usb->was_running)
1475 zd_usb_resume(usb);
1476 return 0;
1477}
1478
e85d0918 1479static struct usb_driver driver = {
459c51ad 1480 .name = KBUILD_MODNAME,
e85d0918
DD		 1481 .id_table = usb_ids,
1482 .probe = probe,
1483 .disconnect = disconnect,
a0fd751f
JK		 1484 .pre_reset = pre_reset,
1485 .post_reset = post_reset,
e85d0918
DD		 1486};
1487
bc5f06a8
UK		 1488struct workqueue_struct *zd_workqueue;
1489
e85d0918
DD		 1490static int __init usb_init(void)
1491{
1492 int r;
1493
741fec53 1494 pr_debug("%s usb_init()\n", driver.name);
e85d0918 1495
bc5f06a8
UK		 1496 zd_workqueue = create_singlethread_workqueue(driver.name);
1497 if (zd_workqueue == NULL) {
741fec53 1498 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
bc5f06a8
UK		 1499 return -ENOMEM;
1500 }
1501
e85d0918
DD		 1502 r = usb_register(&driver);
1503 if (r) {
192b775c 1504 destroy_workqueue(zd_workqueue);
741fec53
UK		 1505 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1506 driver.name, r);
e85d0918
DD		 1507 return r;
1508 }
1509
741fec53 1510 pr_debug("%s initialized\n", driver.name);
e85d0918
DD		 1511 return 0;
1512}
1513
1514static void __exit usb_exit(void)
1515{
741fec53 1516 pr_debug("%s usb_exit()\n", driver.name);
e85d0918 1517 usb_deregister(&driver);
bc5f06a8 1518 destroy_workqueue(zd_workqueue);
e85d0918
DD		 1519}
1520
1521module_init(usb_init);
1522module_exit(usb_exit);
1523
1524static int usb_int_regs_length(unsigned int count)
1525{
1526 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1527}
1528
1529static void prepare_read_regs_int(struct zd_usb *usb)
1530{
1531 struct zd_usb_interrupt *intr = &usb->intr;
1532
a68077de 1533 spin_lock_irq(&intr->lock);
e85d0918
DD		 1534 intr->read_regs_enabled = 1;
1535 INIT_COMPLETION(intr->read_regs.completion);
a68077de
UK		 1536 spin_unlock_irq(&intr->lock);
1537}
1538
1539static void disable_read_regs_int(struct zd_usb *usb)
1540{
1541 struct zd_usb_interrupt *intr = &usb->intr;
1542
1543 spin_lock_irq(&intr->lock);
1544 intr->read_regs_enabled = 0;
1545 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1546}
1547
1548static int get_results(struct zd_usb *usb, u16 *values,
1549 struct usb_req_read_regs *req, unsigned int count)
1550{
1551 int r;
1552 int i;
1553 struct zd_usb_interrupt *intr = &usb->intr;
1554 struct read_regs_int *rr = &intr->read_regs;
1555 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1556
a68077de 1557 spin_lock_irq(&intr->lock);
e85d0918
DD		 1558
1559 r = -EIO;
1560 /* The created block size seems to be larger than expected.
1561 * However results appear to be correct.
1562 */
1563 if (rr->length < usb_int_regs_length(count)) {
1564 dev_dbg_f(zd_usb_dev(usb),
1565 "error: actual length %d less than expected %d\n",
1566 rr->length, usb_int_regs_length(count));
1567 goto error_unlock;
1568 }
1569 if (rr->length > sizeof(rr->buffer)) {
1570 dev_dbg_f(zd_usb_dev(usb),
1571 "error: actual length %d exceeds buffer size %zu\n",
1572 rr->length, sizeof(rr->buffer));
1573 goto error_unlock;
1574 }
1575
1576 for (i = 0; i < count; i++) {
1577 struct reg_data *rd = &regs->regs[i];
1578 if (rd->addr != req->addr[i]) {
1579 dev_dbg_f(zd_usb_dev(usb),
1580 "rd[%d] addr %#06hx expected %#06hx\n", i,
1581 le16_to_cpu(rd->addr),
1582 le16_to_cpu(req->addr[i]));
1583 goto error_unlock;
1584 }
1585 values[i] = le16_to_cpu(rd->value);
1586 }
1587
1588 r = 0;
1589error_unlock:
a68077de 1590 spin_unlock_irq(&intr->lock);
e85d0918
DD		 1591 return r;
1592}
1593
1594int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1595 const zd_addr_t *addresses, unsigned int count)
1596{
1597 int r;
1598 int i, req_len, actual_req_len;
1599 struct usb_device *udev;
1600 struct usb_req_read_regs *req = NULL;
1601 unsigned long timeout;
1602
1603 if (count < 1) {
1604 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1605 return -EINVAL;
1606 }
1607 if (count > USB_MAX_IOREAD16_COUNT) {
1608 dev_dbg_f(zd_usb_dev(usb),
1609 "error: count %u exceeds possible max %u\n",
1610 count, USB_MAX_IOREAD16_COUNT);
1611 return -EINVAL;
1612 }
1613 if (in_atomic()) {
1614 dev_dbg_f(zd_usb_dev(usb),
1615 "error: io in atomic context not supported\n");
1616 return -EWOULDBLOCK;
1617 }
1618 if (!usb_int_enabled(usb)) {
9bca0c3b 1619 dev_dbg_f(zd_usb_dev(usb),
e85d0918
DD		 1620 "error: usb interrupt not enabled\n");
1621 return -EWOULDBLOCK;
1622 }
1623
9bca0c3b
JK		 1624 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1625 BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
1626 sizeof(__le16) > sizeof(usb->req_buf));
1627 BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
1628 sizeof(usb->req_buf));
1629
e85d0918 1630 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
9bca0c3b
JK		 1631 req = (void *)usb->req_buf;
1632
e85d0918
DD		 1633 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1634 for (i = 0; i < count; i++)
0ce34bc8 1635 req->addr[i] = cpu_to_le16((u16)addresses[i]);
e85d0918
DD		 1636
1637 udev = zd_usb_to_usbdev(usb);
1638 prepare_read_regs_int(usb);
37939810
JK		 1639 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1640 req, req_len, &actual_req_len, 50 /* ms */);
e85d0918
DD		 1641 if (r) {
1642 dev_dbg_f(zd_usb_dev(usb),
37939810 1643 "error in usb_interrupt_msg(). Error number %d\n", r);
e85d0918
DD		 1644 goto error;
1645 }
1646 if (req_len != actual_req_len) {
37939810 1647 dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()\n"
e85d0918
DD		 1648 " req_len %d != actual_req_len %d\n",
1649 req_len, actual_req_len);
1650 r = -EIO;
1651 goto error;
1652 }
1653
1654 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
8f2d8f86 1655 msecs_to_jiffies(50));
e85d0918
DD		 1656 if (!timeout) {
1657 disable_read_regs_int(usb);
1658 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1659 r = -ETIMEDOUT;
1660 goto error;
1661 }
1662
1663 r = get_results(usb, values, req, count);
1664error:
e85d0918
DD		 1665 return r;
1666}
1667
eefdbec1
JK		 1668static void iowrite16v_urb_complete(struct urb *urb)
1669{
1670 struct zd_usb *usb = urb->context;
1671
1672 if (urb->status && !usb->cmd_error)
1673 usb->cmd_error = urb->status;
1674}
1675
1676static int zd_submit_waiting_urb(struct zd_usb *usb, bool last)
1677{
8662b251 1678 int r = 0;
eefdbec1
JK		 1679 struct urb *urb = usb->urb_async_waiting;
1680
1681 if (!urb)
1682 return 0;
1683
1684 usb->urb_async_waiting = NULL;
1685
1686 if (!last)
1687 urb->transfer_flags |= URB_NO_INTERRUPT;
1688
1689 usb_anchor_urb(urb, &usb->submitted_cmds);
1690 r = usb_submit_urb(urb, GFP_KERNEL);
1691 if (r) {
1692 usb_unanchor_urb(urb);
1693 dev_dbg_f(zd_usb_dev(usb),
1694 "error in usb_submit_urb(). Error number %d\n", r);
1695 goto error;
1696 }
1697
1698 /* fall-through with r == 0 */
1699error:
1700 usb_free_urb(urb);
1701 return r;
1702}
1703
8662b251 1704void zd_usb_iowrite16v_async_start(struct zd_usb *usb)
eefdbec1
JK		 1705{
1706 ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds));
1707 ZD_ASSERT(usb->urb_async_waiting == NULL);
1708 ZD_ASSERT(!usb->in_async);
1709
1710 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1711
1712 usb->in_async = 1;
1713 usb->cmd_error = 0;
1714 usb->urb_async_waiting = NULL;
1715}
1716
8662b251 1717int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout)
eefdbec1
JK		 1718{
1719 int r;
1720
1721 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1722 ZD_ASSERT(usb->in_async);
1723
1724 /* Submit last iowrite16v URB */
1725 r = zd_submit_waiting_urb(usb, true);
1726 if (r) {
1727 dev_dbg_f(zd_usb_dev(usb),
1728 "error in zd_submit_waiting_usb(). "
1729 "Error number %d\n", r);
1730
1731 usb_kill_anchored_urbs(&usb->submitted_cmds);
1732 goto error;
1733 }
1734
1735 if (timeout)
1736 timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds,
1737 timeout);
1738 if (!timeout) {
1739 usb_kill_anchored_urbs(&usb->submitted_cmds);
1740 if (usb->cmd_error == -ENOENT) {
1741 dev_dbg_f(zd_usb_dev(usb), "timed out");
1742 r = -ETIMEDOUT;
1743 goto error;
1744 }
1745 }
1746
1747 r = usb->cmd_error;
1748error:
1749 usb->in_async = 0;
1750 return r;
1751}
1752
8662b251
JK		 1753int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1754 unsigned int count)
e85d0918
DD		 1755{
1756 int r;
1757 struct usb_device *udev;
1758 struct usb_req_write_regs *req = NULL;
eefdbec1
JK		 1759 int i, req_len;
1760 struct urb *urb;
1761 struct usb_host_endpoint *ep;
1762
1763 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1764 ZD_ASSERT(usb->in_async);
e85d0918
DD		 1765
1766 if (count == 0)
1767 return 0;
1768 if (count > USB_MAX_IOWRITE16_COUNT) {
1769 dev_dbg_f(zd_usb_dev(usb),
1770 "error: count %u exceeds possible max %u\n",
1771 count, USB_MAX_IOWRITE16_COUNT);
1772 return -EINVAL;
1773 }
1774 if (in_atomic()) {
1775 dev_dbg_f(zd_usb_dev(usb),
1776 "error: io in atomic context not supported\n");
1777 return -EWOULDBLOCK;
1778 }
1779
eefdbec1
JK		 1780 udev = zd_usb_to_usbdev(usb);
1781
1782 ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT));
1783 if (!ep)
1784 return -ENOENT;
1785
1786 urb = usb_alloc_urb(0, GFP_KERNEL);
1787 if (!urb)
1788 return -ENOMEM;
9bca0c3b 1789
e85d0918
DD		 1790 req_len = sizeof(struct usb_req_write_regs) +
1791 count * sizeof(struct reg_data);
eefdbec1
JK		 1792 req = kmalloc(req_len, GFP_KERNEL);
1793 if (!req) {
1794 r = -ENOMEM;
1795 goto error;
1796 }
e85d0918
DD		 1797
1798 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1799 for (i = 0; i < count; i++) {
1800 struct reg_data *rw = &req->reg_writes[i];
0ce34bc8 1801 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
e85d0918
DD		 1802 rw->value = cpu_to_le16(ioreqs[i].value);
1803 }
1804
eefdbec1
JK		 1805 usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT),
1806 req, req_len, iowrite16v_urb_complete, usb,
1807 ep->desc.bInterval);
1808 urb->transfer_flags |= URB_FREE_BUFFER | URB_SHORT_NOT_OK;
1809
1810 /* Submit previous URB */
1811 r = zd_submit_waiting_urb(usb, false);
e85d0918
DD		 1812 if (r) {
1813 dev_dbg_f(zd_usb_dev(usb),
eefdbec1
JK		 1814 "error in zd_submit_waiting_usb(). "
1815 "Error number %d\n", r);
e85d0918
DD		 1816 goto error;
1817 }
1818
eefdbec1
JK		 1819 /* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs
1820 * of currect batch except for very last.
1821 */
1822 usb->urb_async_waiting = urb;
1823 return 0;
e85d0918 1824error:
eefdbec1 1825 usb_free_urb(urb);
e85d0918
DD		 1826 return r;
1827}
1828
eefdbec1
JK		 1829int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1830 unsigned int count)
1831{
1832 int r;
1833
1834 zd_usb_iowrite16v_async_start(usb);
1835 r = zd_usb_iowrite16v_async(usb, ioreqs, count);
1836 if (r) {
1837 zd_usb_iowrite16v_async_end(usb, 0);
1838 return r;
1839 }
1840 return zd_usb_iowrite16v_async_end(usb, 50 /* ms */);
1841}
1842
e85d0918
DD		 1843int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1844{
1845 int r;
1846 struct usb_device *udev;
1847 struct usb_req_rfwrite *req = NULL;
1848 int i, req_len, actual_req_len;
1849 u16 bit_value_template;
1850
1851 if (in_atomic()) {
1852 dev_dbg_f(zd_usb_dev(usb),
1853 "error: io in atomic context not supported\n");
1854 return -EWOULDBLOCK;
1855 }
1856 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1857 dev_dbg_f(zd_usb_dev(usb),
1858 "error: bits %d are smaller than"
1859 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1860 bits, USB_MIN_RFWRITE_BIT_COUNT);
1861 return -EINVAL;
1862 }
1863 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1864 dev_dbg_f(zd_usb_dev(usb),
1865 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1866 bits, USB_MAX_RFWRITE_BIT_COUNT);
1867 return -EINVAL;
1868 }
1869#ifdef DEBUG
1870 if (value & (~0UL << bits)) {
1871 dev_dbg_f(zd_usb_dev(usb),
1872 "error: value %#09x has bits >= %d set\n",
1873 value, bits);
1874 return -EINVAL;
1875 }
1876#endif /* DEBUG */
1877
1878 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1879
1880 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1881 if (r) {
1882 dev_dbg_f(zd_usb_dev(usb),
1883 "error %d: Couldn't read CR203\n", r);
9bca0c3b 1884 return r;
e85d0918
DD		 1885 }
1886 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1887
9bca0c3b
JK		 1888 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1889 BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
1890 USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
1891 sizeof(usb->req_buf));
1892 BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
1893 sizeof(usb->req_buf));
1894
e85d0918 1895 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
9bca0c3b 1896 req = (void *)usb->req_buf;
e85d0918
DD		 1897
1898 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1899 /* 1: 3683a, but not used in ZYDAS driver */
1900 req->value = cpu_to_le16(2);
1901 req->bits = cpu_to_le16(bits);
1902
1903 for (i = 0; i < bits; i++) {
1904 u16 bv = bit_value_template;
1905 if (value & (1 << (bits-1-i)))
1906 bv |= RF_DATA;
1907 req->bit_values[i] = cpu_to_le16(bv);
1908 }
1909
1910 udev = zd_usb_to_usbdev(usb);
37939810
JK		 1911 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1912 req, req_len, &actual_req_len, 50 /* ms */);
e85d0918
DD		 1913 if (r) {
1914 dev_dbg_f(zd_usb_dev(usb),
37939810 1915 "error in usb_interrupt_msg(). Error number %d\n", r);
e85d0918
DD		 1916 goto out;
1917 }
1918 if (req_len != actual_req_len) {
37939810 1919 dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()"
e85d0918
DD		 1920 " req_len %d != actual_req_len %d\n",
1921 req_len, actual_req_len);
1922 r = -EIO;
1923 goto out;
1924 }
1925
1926 /* FALL-THROUGH with r == 0 */
1927out:
e85d0918
DD		 1928 return r;
1929}
Linux kernel - Deliverables
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