Commit | Line | Data |
---|---|---|
66bb42fd DD |
1 | /* ZD1211 USB-WLAN driver for Linux |
2 | * | |
3 | * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de> | |
4 | * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org> | |
5 | * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net> | |
e85d0918 DD |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
d066c219 | 22 | #include <linux/kernel.h> |
e85d0918 | 23 | #include <linux/init.h> |
e85d0918 DD |
24 | #include <linux/firmware.h> |
25 | #include <linux/device.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/usb.h> | |
bc5f06a8 | 29 | #include <linux/workqueue.h> |
459c51ad | 30 | #include <net/mac80211.h> |
c248725b | 31 | #include <asm/unaligned.h> |
e85d0918 DD |
32 | |
33 | #include "zd_def.h" | |
e85d0918 DD |
34 | #include "zd_mac.h" |
35 | #include "zd_usb.h" | |
e85d0918 DD |
36 | |
37 | static struct usb_device_id usb_ids[] = { | |
38 | /* ZD1211 */ | |
3bfbe80e HTL |
39 | { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 }, |
40 | { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 }, | |
41 | { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 }, | |
42 | { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 }, | |
43 | { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 }, | |
44 | { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 }, | |
45 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 46 | { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 }, |
14990c69 | 47 | { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
48 | { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 }, |
49 | { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 }, | |
50 | { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 51 | { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 }, |
aa1d3a18 | 52 | { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
53 | { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 }, |
54 | { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 }, | |
55 | { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 }, | |
f2423723 | 56 | { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 }, |
229782a3 | 57 | { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 }, |
269fca0e | 58 | { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
59 | { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 }, |
60 | { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 }, | |
61 | { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, | |
62 | { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 63 | /* ZD1211B */ |
3bfbe80e | 64 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
ad580db5 | 65 | { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
66 | { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
67 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
68 | { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B }, | |
69 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, | |
8b339d05 | 70 | { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
71 | { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B }, |
72 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, | |
73 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
74 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, | |
75 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, | |
dd2f5538 | 76 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
77 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B }, |
78 | { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B }, | |
79 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, | |
8f75e07a | 80 | { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B }, |
f72151fb | 81 | { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B }, |
9dfd5500 | 82 | { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
83 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, |
84 | { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B }, | |
aec91028 | 85 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
c445a31c | 86 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
8e97afe5 | 87 | { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
de262496 | 88 | { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
89 | { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
90 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, | |
91 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, | |
92 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, | |
93 | { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, | |
a1030e92 DD |
94 | /* "Driverless" devices that need ejecting */ |
95 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 96 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
97 | {} |
98 | }; | |
99 | ||
100 | MODULE_LICENSE("GPL"); | |
101 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
102 | MODULE_AUTHOR("Ulrich Kunitz"); | |
103 | MODULE_AUTHOR("Daniel Drake"); | |
104 | MODULE_VERSION("1.0"); | |
105 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
106 | ||
107 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
108 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
109 | ||
e85d0918 | 110 | /* USB device initialization */ |
72e77a8a | 111 | static void int_urb_complete(struct urb *urb); |
e85d0918 DD |
112 | |
113 | static int request_fw_file( | |
114 | const struct firmware **fw, const char *name, struct device *device) | |
115 | { | |
116 | int r; | |
117 | ||
118 | dev_dbg_f(device, "fw name %s\n", name); | |
119 | ||
120 | r = request_firmware(fw, name, device); | |
121 | if (r) | |
122 | dev_err(device, | |
123 | "Could not load firmware file %s. Error number %d\n", | |
124 | name, r); | |
125 | return r; | |
126 | } | |
127 | ||
128 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
129 | { | |
130 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
131 | } | |
132 | ||
133 | enum upload_code_flags { | |
134 | REBOOT = 1, | |
135 | }; | |
136 | ||
137 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
138 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
139 | ||
140 | static int upload_code(struct usb_device *udev, | |
141 | const u8 *data, size_t size, u16 code_offset, int flags) | |
142 | { | |
143 | u8 *p; | |
144 | int r; | |
145 | ||
146 | /* USB request blocks need "kmalloced" buffers. | |
147 | */ | |
148 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
149 | if (!p) { | |
150 | dev_err(&udev->dev, "out of memory\n"); | |
151 | r = -ENOMEM; | |
152 | goto error; | |
153 | } | |
154 | ||
155 | size &= ~1; | |
156 | while (size > 0) { | |
157 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
158 | size : MAX_TRANSFER_SIZE; | |
159 | ||
160 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
161 | ||
162 | memcpy(p, data, transfer_size); | |
163 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
164 | USB_REQ_FIRMWARE_DOWNLOAD, | |
165 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
166 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
167 | if (r < 0) { | |
168 | dev_err(&udev->dev, | |
169 | "USB control request for firmware upload" | |
170 | " failed. Error number %d\n", r); | |
171 | goto error; | |
172 | } | |
173 | transfer_size = r & ~1; | |
174 | ||
175 | size -= transfer_size; | |
176 | data += transfer_size; | |
177 | code_offset += transfer_size/sizeof(u16); | |
178 | } | |
179 | ||
180 | if (flags & REBOOT) { | |
181 | u8 ret; | |
182 | ||
a8c4ea7a | 183 | /* Use "DMA-aware" buffer. */ |
e85d0918 DD |
184 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
185 | USB_REQ_FIRMWARE_CONFIRM, | |
186 | USB_DIR_IN | USB_TYPE_VENDOR, | |
a8c4ea7a | 187 | 0, 0, p, sizeof(ret), 5000 /* ms */); |
e85d0918 DD |
188 | if (r != sizeof(ret)) { |
189 | dev_err(&udev->dev, | |
190 | "control request firmeware confirmation failed." | |
191 | " Return value %d\n", r); | |
192 | if (r >= 0) | |
193 | r = -ENODEV; | |
194 | goto error; | |
195 | } | |
a8c4ea7a | 196 | ret = p[0]; |
e85d0918 DD |
197 | if (ret & 0x80) { |
198 | dev_err(&udev->dev, | |
199 | "Internal error while downloading." | |
200 | " Firmware confirm return value %#04x\n", | |
201 | (unsigned int)ret); | |
202 | r = -ENODEV; | |
203 | goto error; | |
204 | } | |
205 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
206 | (unsigned int)ret); | |
207 | } | |
208 | ||
209 | r = 0; | |
210 | error: | |
211 | kfree(p); | |
212 | return r; | |
213 | } | |
214 | ||
215 | static u16 get_word(const void *data, u16 offset) | |
216 | { | |
217 | const __le16 *p = data; | |
218 | return le16_to_cpu(p[offset]); | |
219 | } | |
220 | ||
74553aed | 221 | static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
e85d0918 DD |
222 | const char* postfix) |
223 | { | |
224 | scnprintf(buffer, size, "%s%s", | |
74553aed | 225 | usb->is_zd1211b ? |
e85d0918 DD |
226 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
227 | postfix); | |
228 | return buffer; | |
229 | } | |
230 | ||
74553aed | 231 | static int handle_version_mismatch(struct zd_usb *usb, |
d066c219 DD |
232 | const struct firmware *ub_fw) |
233 | { | |
74553aed | 234 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
d066c219 DD |
235 | const struct firmware *ur_fw = NULL; |
236 | int offset; | |
237 | int r = 0; | |
238 | char fw_name[128]; | |
239 | ||
240 | r = request_fw_file(&ur_fw, | |
74553aed | 241 | get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
d066c219 DD |
242 | &udev->dev); |
243 | if (r) | |
244 | goto error; | |
245 | ||
ee302767 | 246 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
247 | if (r) |
248 | goto error; | |
249 | ||
ee302767 | 250 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 251 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 252 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
253 | |
254 | /* At this point, the vendor driver downloads the whole firmware | |
255 | * image, hacks around with version IDs, and uploads it again, | |
256 | * completely overwriting the boot code. We do not do this here as | |
257 | * it is not required on any tested devices, and it is suspected to | |
258 | * cause problems. */ | |
259 | error: | |
260 | release_firmware(ur_fw); | |
261 | return r; | |
262 | } | |
263 | ||
74553aed | 264 | static int upload_firmware(struct zd_usb *usb) |
e85d0918 DD |
265 | { |
266 | int r; | |
267 | u16 fw_bcdDevice; | |
268 | u16 bcdDevice; | |
74553aed | 269 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
270 | const struct firmware *ub_fw = NULL; |
271 | const struct firmware *uph_fw = NULL; | |
272 | char fw_name[128]; | |
273 | ||
274 | bcdDevice = get_bcdDevice(udev); | |
275 | ||
276 | r = request_fw_file(&ub_fw, | |
74553aed | 277 | get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
e85d0918 DD |
278 | &udev->dev); |
279 | if (r) | |
280 | goto error; | |
281 | ||
ee302767 | 282 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 283 | |
e85d0918 DD |
284 | if (fw_bcdDevice != bcdDevice) { |
285 | dev_info(&udev->dev, | |
d066c219 DD |
286 | "firmware version %#06x and device bootcode version " |
287 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
288 | if (bcdDevice <= 0x4313) | |
289 | dev_warn(&udev->dev, "device has old bootcode, please " | |
290 | "report success or failure\n"); | |
291 | ||
74553aed | 292 | r = handle_version_mismatch(usb, ub_fw); |
d066c219 DD |
293 | if (r) |
294 | goto error; | |
e85d0918 DD |
295 | } else { |
296 | dev_dbg_f(&udev->dev, | |
297 | "firmware device id %#06x is equal to the " | |
298 | "actual device id\n", fw_bcdDevice); | |
299 | } | |
300 | ||
301 | ||
302 | r = request_fw_file(&uph_fw, | |
74553aed | 303 | get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
e85d0918 DD |
304 | &udev->dev); |
305 | if (r) | |
306 | goto error; | |
307 | ||
ee302767 | 308 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
309 | if (r) { |
310 | dev_err(&udev->dev, | |
311 | "Could not upload firmware code uph. Error number %d\n", | |
312 | r); | |
313 | } | |
314 | ||
315 | /* FALL-THROUGH */ | |
316 | error: | |
317 | release_firmware(ub_fw); | |
318 | release_firmware(uph_fw); | |
319 | return r; | |
320 | } | |
321 | ||
3e8b4d00 BH |
322 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur"); |
323 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur"); | |
324 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub"); | |
325 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub"); | |
326 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr"); | |
327 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr"); | |
328 | ||
74553aed DD |
329 | /* Read data from device address space using "firmware interface" which does |
330 | * not require firmware to be loaded. */ | |
331 | int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) | |
332 | { | |
333 | int r; | |
334 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
a8c4ea7a | 335 | u8 *buf; |
74553aed | 336 | |
a8c4ea7a AN |
337 | /* Use "DMA-aware" buffer. */ |
338 | buf = kmalloc(len, GFP_KERNEL); | |
339 | if (!buf) | |
340 | return -ENOMEM; | |
74553aed DD |
341 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
342 | USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, | |
a8c4ea7a | 343 | buf, len, 5000); |
74553aed DD |
344 | if (r < 0) { |
345 | dev_err(&udev->dev, | |
346 | "read over firmware interface failed: %d\n", r); | |
a8c4ea7a | 347 | goto exit; |
74553aed DD |
348 | } else if (r != len) { |
349 | dev_err(&udev->dev, | |
350 | "incomplete read over firmware interface: %d/%d\n", | |
351 | r, len); | |
a8c4ea7a AN |
352 | r = -EIO; |
353 | goto exit; | |
74553aed | 354 | } |
a8c4ea7a AN |
355 | r = 0; |
356 | memcpy(data, buf, len); | |
357 | exit: | |
358 | kfree(buf); | |
359 | return r; | |
74553aed DD |
360 | } |
361 | ||
e85d0918 DD |
362 | #define urb_dev(urb) (&(urb)->dev->dev) |
363 | ||
364 | static inline void handle_regs_int(struct urb *urb) | |
365 | { | |
366 | struct zd_usb *usb = urb->context; | |
367 | struct zd_usb_interrupt *intr = &usb->intr; | |
368 | int len; | |
72e77a8a | 369 | u16 int_num; |
e85d0918 DD |
370 | |
371 | ZD_ASSERT(in_interrupt()); | |
372 | spin_lock(&intr->lock); | |
373 | ||
d63ddcec | 374 | int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); |
72e77a8a LCC |
375 | if (int_num == CR_INTERRUPT) { |
376 | struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); | |
377 | memcpy(&mac->intr_buffer, urb->transfer_buffer, | |
378 | USB_MAX_EP_INT_BUFFER); | |
379 | schedule_work(&mac->process_intr); | |
380 | } else if (intr->read_regs_enabled) { | |
e85d0918 DD |
381 | intr->read_regs.length = len = urb->actual_length; |
382 | ||
383 | if (len > sizeof(intr->read_regs.buffer)) | |
384 | len = sizeof(intr->read_regs.buffer); | |
385 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); | |
386 | intr->read_regs_enabled = 0; | |
387 | complete(&intr->read_regs.completion); | |
388 | goto out; | |
389 | } | |
390 | ||
e85d0918 DD |
391 | out: |
392 | spin_unlock(&intr->lock); | |
393 | } | |
394 | ||
7d12e780 | 395 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
396 | { |
397 | int r; | |
398 | struct usb_int_header *hdr; | |
399 | ||
400 | switch (urb->status) { | |
401 | case 0: | |
402 | break; | |
403 | case -ESHUTDOWN: | |
404 | case -EINVAL: | |
405 | case -ENODEV: | |
406 | case -ENOENT: | |
407 | case -ECONNRESET: | |
e85d0918 | 408 | case -EPIPE: |
b312d799 | 409 | goto kfree; |
e85d0918 DD |
410 | default: |
411 | goto resubmit; | |
412 | } | |
413 | ||
414 | if (urb->actual_length < sizeof(hdr)) { | |
415 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
416 | goto resubmit; | |
417 | } | |
418 | ||
419 | hdr = urb->transfer_buffer; | |
420 | if (hdr->type != USB_INT_TYPE) { | |
421 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
422 | goto resubmit; | |
423 | } | |
424 | ||
425 | switch (hdr->id) { | |
426 | case USB_INT_ID_REGS: | |
427 | handle_regs_int(urb); | |
428 | break; | |
429 | case USB_INT_ID_RETRY_FAILED: | |
7f4013f0 | 430 | zd_mac_tx_failed(urb); |
e85d0918 DD |
431 | break; |
432 | default: | |
433 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
434 | (unsigned int)hdr->id); | |
435 | goto resubmit; | |
436 | } | |
437 | ||
438 | resubmit: | |
439 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
440 | if (r) { | |
441 | dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb); | |
442 | goto kfree; | |
443 | } | |
444 | return; | |
445 | kfree: | |
446 | kfree(urb->transfer_buffer); | |
447 | } | |
448 | ||
449 | static inline int int_urb_interval(struct usb_device *udev) | |
450 | { | |
451 | switch (udev->speed) { | |
452 | case USB_SPEED_HIGH: | |
453 | return 4; | |
454 | case USB_SPEED_LOW: | |
455 | return 10; | |
456 | case USB_SPEED_FULL: | |
457 | default: | |
458 | return 1; | |
459 | } | |
460 | } | |
461 | ||
462 | static inline int usb_int_enabled(struct zd_usb *usb) | |
463 | { | |
464 | unsigned long flags; | |
465 | struct zd_usb_interrupt *intr = &usb->intr; | |
466 | struct urb *urb; | |
467 | ||
468 | spin_lock_irqsave(&intr->lock, flags); | |
469 | urb = intr->urb; | |
470 | spin_unlock_irqrestore(&intr->lock, flags); | |
471 | return urb != NULL; | |
472 | } | |
473 | ||
474 | int zd_usb_enable_int(struct zd_usb *usb) | |
475 | { | |
476 | int r; | |
477 | struct usb_device *udev; | |
478 | struct zd_usb_interrupt *intr = &usb->intr; | |
479 | void *transfer_buffer = NULL; | |
480 | struct urb *urb; | |
481 | ||
482 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
483 | ||
35c3404e | 484 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
485 | if (!urb) { |
486 | r = -ENOMEM; | |
487 | goto out; | |
488 | } | |
489 | ||
490 | ZD_ASSERT(!irqs_disabled()); | |
491 | spin_lock_irq(&intr->lock); | |
492 | if (intr->urb) { | |
493 | spin_unlock_irq(&intr->lock); | |
494 | r = 0; | |
495 | goto error_free_urb; | |
496 | } | |
497 | intr->urb = urb; | |
498 | spin_unlock_irq(&intr->lock); | |
499 | ||
500 | /* TODO: make it a DMA buffer */ | |
501 | r = -ENOMEM; | |
35c3404e | 502 | transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL); |
e85d0918 DD |
503 | if (!transfer_buffer) { |
504 | dev_dbg_f(zd_usb_dev(usb), | |
505 | "couldn't allocate transfer_buffer\n"); | |
506 | goto error_set_urb_null; | |
507 | } | |
508 | ||
509 | udev = zd_usb_to_usbdev(usb); | |
510 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), | |
511 | transfer_buffer, USB_MAX_EP_INT_BUFFER, | |
512 | int_urb_complete, usb, | |
513 | intr->interval); | |
514 | ||
515 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 516 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
517 | if (r) { |
518 | dev_dbg_f(zd_usb_dev(usb), | |
519 | "Couldn't submit urb. Error number %d\n", r); | |
520 | goto error; | |
521 | } | |
522 | ||
523 | return 0; | |
524 | error: | |
525 | kfree(transfer_buffer); | |
526 | error_set_urb_null: | |
527 | spin_lock_irq(&intr->lock); | |
528 | intr->urb = NULL; | |
529 | spin_unlock_irq(&intr->lock); | |
530 | error_free_urb: | |
531 | usb_free_urb(urb); | |
532 | out: | |
533 | return r; | |
534 | } | |
535 | ||
536 | void zd_usb_disable_int(struct zd_usb *usb) | |
537 | { | |
538 | unsigned long flags; | |
539 | struct zd_usb_interrupt *intr = &usb->intr; | |
540 | struct urb *urb; | |
541 | ||
542 | spin_lock_irqsave(&intr->lock, flags); | |
543 | urb = intr->urb; | |
544 | if (!urb) { | |
545 | spin_unlock_irqrestore(&intr->lock, flags); | |
546 | return; | |
547 | } | |
548 | intr->urb = NULL; | |
549 | spin_unlock_irqrestore(&intr->lock, flags); | |
550 | ||
551 | usb_kill_urb(urb); | |
552 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
553 | usb_free_urb(urb); | |
554 | } | |
555 | ||
556 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
557 | unsigned int length) | |
558 | { | |
559 | int i; | |
e85d0918 DD |
560 | const struct rx_length_info *length_info; |
561 | ||
562 | if (length < sizeof(struct rx_length_info)) { | |
563 | /* It's not a complete packet anyhow. */ | |
7f4013f0 BP |
564 | printk("%s: invalid, small RX packet : %d\n", |
565 | __func__, length); | |
e85d0918 DD |
566 | return; |
567 | } | |
568 | length_info = (struct rx_length_info *) | |
569 | (buffer + length - sizeof(struct rx_length_info)); | |
570 | ||
571 | /* It might be that three frames are merged into a single URB | |
572 | * transaction. We have to check for the length info tag. | |
573 | * | |
574 | * While testing we discovered that length_info might be unaligned, | |
575 | * because if USB transactions are merged, the last packet will not | |
576 | * be padded. Unaligned access might also happen if the length_info | |
577 | * structure is not present. | |
578 | */ | |
533dd1b0 | 579 | if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG) |
b269825b | 580 | { |
e85d0918 DD |
581 | unsigned int l, k, n; |
582 | for (i = 0, l = 0;; i++) { | |
533dd1b0 | 583 | k = get_unaligned_le16(&length_info->length[i]); |
850c211c UK |
584 | if (k == 0) |
585 | return; | |
e85d0918 DD |
586 | n = l+k; |
587 | if (n > length) | |
588 | return; | |
459c51ad | 589 | zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k); |
e85d0918 DD |
590 | if (i >= 2) |
591 | return; | |
592 | l = (n+3) & ~3; | |
593 | } | |
594 | } else { | |
459c51ad | 595 | zd_mac_rx(zd_usb_to_hw(usb), buffer, length); |
e85d0918 DD |
596 | } |
597 | } | |
598 | ||
7d12e780 | 599 | static void rx_urb_complete(struct urb *urb) |
e85d0918 DD |
600 | { |
601 | struct zd_usb *usb; | |
602 | struct zd_usb_rx *rx; | |
603 | const u8 *buffer; | |
604 | unsigned int length; | |
605 | ||
606 | switch (urb->status) { | |
607 | case 0: | |
608 | break; | |
609 | case -ESHUTDOWN: | |
610 | case -EINVAL: | |
611 | case -ENODEV: | |
612 | case -ENOENT: | |
613 | case -ECONNRESET: | |
e85d0918 | 614 | case -EPIPE: |
b312d799 | 615 | return; |
e85d0918 DD |
616 | default: |
617 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
618 | goto resubmit; | |
619 | } | |
620 | ||
621 | buffer = urb->transfer_buffer; | |
622 | length = urb->actual_length; | |
623 | usb = urb->context; | |
624 | rx = &usb->rx; | |
625 | ||
626 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { | |
627 | /* If there is an old first fragment, we don't care. */ | |
628 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
629 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
630 | spin_lock(&rx->lock); | |
631 | memcpy(rx->fragment, buffer, length); | |
632 | rx->fragment_length = length; | |
633 | spin_unlock(&rx->lock); | |
634 | goto resubmit; | |
635 | } | |
636 | ||
637 | spin_lock(&rx->lock); | |
638 | if (rx->fragment_length > 0) { | |
639 | /* We are on a second fragment, we believe */ | |
640 | ZD_ASSERT(length + rx->fragment_length <= | |
641 | ARRAY_SIZE(rx->fragment)); | |
642 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
643 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
644 | handle_rx_packet(usb, rx->fragment, | |
645 | rx->fragment_length + length); | |
646 | rx->fragment_length = 0; | |
647 | spin_unlock(&rx->lock); | |
648 | } else { | |
649 | spin_unlock(&rx->lock); | |
650 | handle_rx_packet(usb, buffer, length); | |
651 | } | |
652 | ||
653 | resubmit: | |
654 | usb_submit_urb(urb, GFP_ATOMIC); | |
655 | } | |
656 | ||
459c51ad | 657 | static struct urb *alloc_rx_urb(struct zd_usb *usb) |
e85d0918 DD |
658 | { |
659 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
660 | struct urb *urb; | |
661 | void *buffer; | |
662 | ||
35c3404e | 663 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
664 | if (!urb) |
665 | return NULL; | |
35c3404e | 666 | buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
e85d0918 DD |
667 | &urb->transfer_dma); |
668 | if (!buffer) { | |
669 | usb_free_urb(urb); | |
670 | return NULL; | |
671 | } | |
672 | ||
673 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
674 | buffer, USB_MAX_RX_SIZE, | |
675 | rx_urb_complete, usb); | |
676 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
677 | ||
678 | return urb; | |
679 | } | |
680 | ||
459c51ad | 681 | static void free_rx_urb(struct urb *urb) |
e85d0918 DD |
682 | { |
683 | if (!urb) | |
684 | return; | |
685 | usb_buffer_free(urb->dev, urb->transfer_buffer_length, | |
686 | urb->transfer_buffer, urb->transfer_dma); | |
687 | usb_free_urb(urb); | |
688 | } | |
689 | ||
690 | int zd_usb_enable_rx(struct zd_usb *usb) | |
691 | { | |
692 | int i, r; | |
693 | struct zd_usb_rx *rx = &usb->rx; | |
694 | struct urb **urbs; | |
695 | ||
696 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
697 | ||
698 | r = -ENOMEM; | |
459c51ad | 699 | urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
700 | if (!urbs) |
701 | goto error; | |
459c51ad DD |
702 | for (i = 0; i < RX_URBS_COUNT; i++) { |
703 | urbs[i] = alloc_rx_urb(usb); | |
e85d0918 DD |
704 | if (!urbs[i]) |
705 | goto error; | |
706 | } | |
707 | ||
708 | ZD_ASSERT(!irqs_disabled()); | |
709 | spin_lock_irq(&rx->lock); | |
710 | if (rx->urbs) { | |
711 | spin_unlock_irq(&rx->lock); | |
712 | r = 0; | |
713 | goto error; | |
714 | } | |
715 | rx->urbs = urbs; | |
459c51ad | 716 | rx->urbs_count = RX_URBS_COUNT; |
e85d0918 DD |
717 | spin_unlock_irq(&rx->lock); |
718 | ||
459c51ad | 719 | for (i = 0; i < RX_URBS_COUNT; i++) { |
35c3404e | 720 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
721 | if (r) |
722 | goto error_submit; | |
723 | } | |
724 | ||
725 | return 0; | |
726 | error_submit: | |
459c51ad | 727 | for (i = 0; i < RX_URBS_COUNT; i++) { |
e85d0918 DD |
728 | usb_kill_urb(urbs[i]); |
729 | } | |
730 | spin_lock_irq(&rx->lock); | |
731 | rx->urbs = NULL; | |
732 | rx->urbs_count = 0; | |
733 | spin_unlock_irq(&rx->lock); | |
734 | error: | |
735 | if (urbs) { | |
459c51ad DD |
736 | for (i = 0; i < RX_URBS_COUNT; i++) |
737 | free_rx_urb(urbs[i]); | |
e85d0918 DD |
738 | } |
739 | return r; | |
740 | } | |
741 | ||
742 | void zd_usb_disable_rx(struct zd_usb *usb) | |
743 | { | |
744 | int i; | |
745 | unsigned long flags; | |
746 | struct urb **urbs; | |
747 | unsigned int count; | |
748 | struct zd_usb_rx *rx = &usb->rx; | |
749 | ||
750 | spin_lock_irqsave(&rx->lock, flags); | |
751 | urbs = rx->urbs; | |
752 | count = rx->urbs_count; | |
753 | spin_unlock_irqrestore(&rx->lock, flags); | |
754 | if (!urbs) | |
755 | return; | |
756 | ||
757 | for (i = 0; i < count; i++) { | |
758 | usb_kill_urb(urbs[i]); | |
459c51ad | 759 | free_rx_urb(urbs[i]); |
e85d0918 DD |
760 | } |
761 | kfree(urbs); | |
762 | ||
763 | spin_lock_irqsave(&rx->lock, flags); | |
764 | rx->urbs = NULL; | |
765 | rx->urbs_count = 0; | |
766 | spin_unlock_irqrestore(&rx->lock, flags); | |
767 | } | |
768 | ||
459c51ad DD |
769 | /** |
770 | * zd_usb_disable_tx - disable transmission | |
771 | * @usb: the zd1211rw-private USB structure | |
772 | * | |
773 | * Frees all URBs in the free list and marks the transmission as disabled. | |
774 | */ | |
775 | void zd_usb_disable_tx(struct zd_usb *usb) | |
776 | { | |
777 | struct zd_usb_tx *tx = &usb->tx; | |
778 | unsigned long flags; | |
779 | struct list_head *pos, *n; | |
780 | ||
781 | spin_lock_irqsave(&tx->lock, flags); | |
782 | list_for_each_safe(pos, n, &tx->free_urb_list) { | |
783 | list_del(pos); | |
784 | usb_free_urb(list_entry(pos, struct urb, urb_list)); | |
785 | } | |
786 | tx->enabled = 0; | |
787 | tx->submitted_urbs = 0; | |
788 | /* The stopped state is ignored, relying on ieee80211_wake_queues() | |
789 | * in a potentionally following zd_usb_enable_tx(). | |
790 | */ | |
791 | spin_unlock_irqrestore(&tx->lock, flags); | |
792 | } | |
793 | ||
794 | /** | |
795 | * zd_usb_enable_tx - enables transmission | |
796 | * @usb: a &struct zd_usb pointer | |
797 | * | |
798 | * This function enables transmission and prepares the &zd_usb_tx data | |
799 | * structure. | |
800 | */ | |
801 | void zd_usb_enable_tx(struct zd_usb *usb) | |
802 | { | |
803 | unsigned long flags; | |
804 | struct zd_usb_tx *tx = &usb->tx; | |
805 | ||
806 | spin_lock_irqsave(&tx->lock, flags); | |
807 | tx->enabled = 1; | |
808 | tx->submitted_urbs = 0; | |
809 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
810 | tx->stopped = 0; | |
811 | spin_unlock_irqrestore(&tx->lock, flags); | |
812 | } | |
813 | ||
814 | /** | |
815 | * alloc_tx_urb - provides an tx URB | |
816 | * @usb: a &struct zd_usb pointer | |
817 | * | |
818 | * Allocates a new URB. If possible takes the urb from the free list in | |
819 | * usb->tx. | |
820 | */ | |
821 | static struct urb *alloc_tx_urb(struct zd_usb *usb) | |
822 | { | |
823 | struct zd_usb_tx *tx = &usb->tx; | |
824 | unsigned long flags; | |
825 | struct list_head *entry; | |
826 | struct urb *urb; | |
827 | ||
828 | spin_lock_irqsave(&tx->lock, flags); | |
829 | if (list_empty(&tx->free_urb_list)) { | |
830 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
831 | goto out; | |
832 | } | |
833 | entry = tx->free_urb_list.next; | |
834 | list_del(entry); | |
835 | urb = list_entry(entry, struct urb, urb_list); | |
836 | out: | |
837 | spin_unlock_irqrestore(&tx->lock, flags); | |
838 | return urb; | |
839 | } | |
840 | ||
841 | /** | |
842 | * free_tx_urb - frees a used tx URB | |
843 | * @usb: a &struct zd_usb pointer | |
844 | * @urb: URB to be freed | |
845 | * | |
846 | * Frees the the transmission URB, which means to put it on the free URB | |
847 | * list. | |
848 | */ | |
849 | static void free_tx_urb(struct zd_usb *usb, struct urb *urb) | |
850 | { | |
851 | struct zd_usb_tx *tx = &usb->tx; | |
852 | unsigned long flags; | |
853 | ||
854 | spin_lock_irqsave(&tx->lock, flags); | |
855 | if (!tx->enabled) { | |
856 | usb_free_urb(urb); | |
857 | goto out; | |
858 | } | |
859 | list_add(&urb->urb_list, &tx->free_urb_list); | |
860 | out: | |
861 | spin_unlock_irqrestore(&tx->lock, flags); | |
862 | } | |
863 | ||
864 | static void tx_dec_submitted_urbs(struct zd_usb *usb) | |
865 | { | |
866 | struct zd_usb_tx *tx = &usb->tx; | |
867 | unsigned long flags; | |
868 | ||
869 | spin_lock_irqsave(&tx->lock, flags); | |
870 | --tx->submitted_urbs; | |
871 | if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) { | |
872 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
873 | tx->stopped = 0; | |
874 | } | |
875 | spin_unlock_irqrestore(&tx->lock, flags); | |
876 | } | |
877 | ||
878 | static void tx_inc_submitted_urbs(struct zd_usb *usb) | |
879 | { | |
880 | struct zd_usb_tx *tx = &usb->tx; | |
881 | unsigned long flags; | |
882 | ||
883 | spin_lock_irqsave(&tx->lock, flags); | |
884 | ++tx->submitted_urbs; | |
885 | if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) { | |
886 | ieee80211_stop_queues(zd_usb_to_hw(usb)); | |
887 | tx->stopped = 1; | |
888 | } | |
889 | spin_unlock_irqrestore(&tx->lock, flags); | |
890 | } | |
891 | ||
892 | /** | |
893 | * tx_urb_complete - completes the execution of an URB | |
894 | * @urb: a URB | |
895 | * | |
896 | * This function is called if the URB has been transferred to a device or an | |
897 | * error has happened. | |
898 | */ | |
7d12e780 | 899 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
900 | { |
901 | int r; | |
459c51ad | 902 | struct sk_buff *skb; |
e039fa4a | 903 | struct ieee80211_tx_info *info; |
459c51ad | 904 | struct zd_usb *usb; |
e85d0918 DD |
905 | |
906 | switch (urb->status) { | |
907 | case 0: | |
908 | break; | |
909 | case -ESHUTDOWN: | |
910 | case -EINVAL: | |
911 | case -ENODEV: | |
912 | case -ENOENT: | |
913 | case -ECONNRESET: | |
b312d799 | 914 | case -EPIPE: |
e85d0918 DD |
915 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
916 | break; | |
e85d0918 DD |
917 | default: |
918 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
919 | goto resubmit; | |
920 | } | |
921 | free_urb: | |
459c51ad | 922 | skb = (struct sk_buff *)urb->context; |
dbabad0c JB |
923 | /* |
924 | * grab 'usb' pointer before handing off the skb (since | |
925 | * it might be freed by zd_mac_tx_to_dev or mac80211) | |
926 | */ | |
e039fa4a | 927 | info = IEEE80211_SKB_CB(skb); |
e6a9854b | 928 | usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb; |
dbabad0c | 929 | zd_mac_tx_to_dev(skb, urb->status); |
459c51ad DD |
930 | free_tx_urb(usb, urb); |
931 | tx_dec_submitted_urbs(usb); | |
e85d0918 DD |
932 | return; |
933 | resubmit: | |
934 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
935 | if (r) { | |
936 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); | |
937 | goto free_urb; | |
938 | } | |
939 | } | |
940 | ||
459c51ad DD |
941 | /** |
942 | * zd_usb_tx: initiates transfer of a frame of the device | |
943 | * | |
944 | * @usb: the zd1211rw-private USB structure | |
945 | * @skb: a &struct sk_buff pointer | |
946 | * | |
947 | * This function tranmits a frame to the device. It doesn't wait for | |
948 | * completion. The frame must contain the control set and have all the | |
949 | * control set information available. | |
950 | * | |
951 | * The function returns 0 if the transfer has been successfully initiated. | |
e85d0918 | 952 | */ |
459c51ad | 953 | int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb) |
e85d0918 DD |
954 | { |
955 | int r; | |
956 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
957 | struct urb *urb; | |
e85d0918 | 958 | |
459c51ad | 959 | urb = alloc_tx_urb(usb); |
e85d0918 DD |
960 | if (!urb) { |
961 | r = -ENOMEM; | |
962 | goto out; | |
963 | } | |
964 | ||
e85d0918 | 965 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
459c51ad | 966 | skb->data, skb->len, tx_urb_complete, skb); |
e85d0918 DD |
967 | |
968 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
969 | if (r) | |
970 | goto error; | |
459c51ad | 971 | tx_inc_submitted_urbs(usb); |
e85d0918 DD |
972 | return 0; |
973 | error: | |
459c51ad | 974 | free_tx_urb(usb, urb); |
e85d0918 DD |
975 | out: |
976 | return r; | |
977 | } | |
978 | ||
979 | static inline void init_usb_interrupt(struct zd_usb *usb) | |
980 | { | |
981 | struct zd_usb_interrupt *intr = &usb->intr; | |
982 | ||
983 | spin_lock_init(&intr->lock); | |
984 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
985 | init_completion(&intr->read_regs.completion); | |
0ce34bc8 | 986 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
987 | } |
988 | ||
989 | static inline void init_usb_rx(struct zd_usb *usb) | |
990 | { | |
991 | struct zd_usb_rx *rx = &usb->rx; | |
992 | spin_lock_init(&rx->lock); | |
993 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { | |
994 | rx->usb_packet_size = 512; | |
995 | } else { | |
996 | rx->usb_packet_size = 64; | |
997 | } | |
998 | ZD_ASSERT(rx->fragment_length == 0); | |
999 | } | |
1000 | ||
1001 | static inline void init_usb_tx(struct zd_usb *usb) | |
1002 | { | |
459c51ad DD |
1003 | struct zd_usb_tx *tx = &usb->tx; |
1004 | spin_lock_init(&tx->lock); | |
1005 | tx->enabled = 0; | |
1006 | tx->stopped = 0; | |
1007 | INIT_LIST_HEAD(&tx->free_urb_list); | |
1008 | tx->submitted_urbs = 0; | |
e85d0918 DD |
1009 | } |
1010 | ||
459c51ad | 1011 | void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw, |
e85d0918 DD |
1012 | struct usb_interface *intf) |
1013 | { | |
1014 | memset(usb, 0, sizeof(*usb)); | |
1015 | usb->intf = usb_get_intf(intf); | |
459c51ad | 1016 | usb_set_intfdata(usb->intf, hw); |
e85d0918 DD |
1017 | init_usb_interrupt(usb); |
1018 | init_usb_tx(usb); | |
1019 | init_usb_rx(usb); | |
1020 | } | |
1021 | ||
e85d0918 DD |
1022 | void zd_usb_clear(struct zd_usb *usb) |
1023 | { | |
1024 | usb_set_intfdata(usb->intf, NULL); | |
1025 | usb_put_intf(usb->intf); | |
c48cf125 | 1026 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
1027 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
1028 | } | |
1029 | ||
1030 | static const char *speed(enum usb_device_speed speed) | |
1031 | { | |
1032 | switch (speed) { | |
1033 | case USB_SPEED_LOW: | |
1034 | return "low"; | |
1035 | case USB_SPEED_FULL: | |
1036 | return "full"; | |
1037 | case USB_SPEED_HIGH: | |
1038 | return "high"; | |
1039 | default: | |
1040 | return "unknown speed"; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
1045 | { | |
1046 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
1047 | le16_to_cpu(udev->descriptor.idVendor), | |
1048 | le16_to_cpu(udev->descriptor.idProduct), | |
1049 | get_bcdDevice(udev), | |
1050 | speed(udev->speed)); | |
1051 | } | |
1052 | ||
1053 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
1054 | { | |
1055 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
1056 | return scnprint_id(udev, buffer, size); | |
1057 | } | |
1058 | ||
1059 | #ifdef DEBUG | |
1060 | static void print_id(struct usb_device *udev) | |
1061 | { | |
1062 | char buffer[40]; | |
1063 | ||
1064 | scnprint_id(udev, buffer, sizeof(buffer)); | |
1065 | buffer[sizeof(buffer)-1] = 0; | |
1066 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
1067 | } | |
1068 | #else | |
1069 | #define print_id(udev) do { } while (0) | |
1070 | #endif | |
1071 | ||
a1030e92 DD |
1072 | static int eject_installer(struct usb_interface *intf) |
1073 | { | |
1074 | struct usb_device *udev = interface_to_usbdev(intf); | |
1075 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
1076 | struct usb_endpoint_descriptor *endpoint; | |
1077 | unsigned char *cmd; | |
1078 | u8 bulk_out_ep; | |
1079 | int r; | |
1080 | ||
1081 | /* Find bulk out endpoint */ | |
1082 | endpoint = &iface_desc->endpoint[1].desc; | |
33e2fb2f | 1083 | if (usb_endpoint_dir_out(endpoint) && |
f201a8a4 | 1084 | usb_endpoint_xfer_bulk(endpoint)) { |
a1030e92 DD |
1085 | bulk_out_ep = endpoint->bEndpointAddress; |
1086 | } else { | |
1087 | dev_err(&udev->dev, | |
1088 | "zd1211rw: Could not find bulk out endpoint\n"); | |
1089 | return -ENODEV; | |
1090 | } | |
1091 | ||
1092 | cmd = kzalloc(31, GFP_KERNEL); | |
1093 | if (cmd == NULL) | |
1094 | return -ENODEV; | |
1095 | ||
1096 | /* USB bulk command block */ | |
1097 | cmd[0] = 0x55; /* bulk command signature */ | |
1098 | cmd[1] = 0x53; /* bulk command signature */ | |
1099 | cmd[2] = 0x42; /* bulk command signature */ | |
1100 | cmd[3] = 0x43; /* bulk command signature */ | |
1101 | cmd[14] = 6; /* command length */ | |
1102 | ||
1103 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
1104 | cmd[19] = 0x2; /* eject disc */ | |
1105 | ||
1106 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
1107 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
1108 | cmd, 31, NULL, 2000); | |
1109 | kfree(cmd); | |
1110 | if (r) | |
1111 | return r; | |
1112 | ||
1113 | /* At this point, the device disconnects and reconnects with the real | |
1114 | * ID numbers. */ | |
1115 | ||
1116 | usb_set_intfdata(intf, NULL); | |
1117 | return 0; | |
1118 | } | |
1119 | ||
74553aed DD |
1120 | int zd_usb_init_hw(struct zd_usb *usb) |
1121 | { | |
1122 | int r; | |
1123 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1124 | ||
1125 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1126 | ||
1127 | r = upload_firmware(usb); | |
1128 | if (r) { | |
1129 | dev_err(zd_usb_dev(usb), | |
1130 | "couldn't load firmware. Error number %d\n", r); | |
1131 | return r; | |
1132 | } | |
1133 | ||
1134 | r = usb_reset_configuration(zd_usb_to_usbdev(usb)); | |
1135 | if (r) { | |
1136 | dev_dbg_f(zd_usb_dev(usb), | |
1137 | "couldn't reset configuration. Error number %d\n", r); | |
1138 | return r; | |
1139 | } | |
1140 | ||
459c51ad | 1141 | r = zd_mac_init_hw(mac->hw); |
74553aed DD |
1142 | if (r) { |
1143 | dev_dbg_f(zd_usb_dev(usb), | |
1144 | "couldn't initialize mac. Error number %d\n", r); | |
1145 | return r; | |
1146 | } | |
1147 | ||
1148 | usb->initialized = 1; | |
1149 | return 0; | |
1150 | } | |
1151 | ||
e85d0918 DD |
1152 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
1153 | { | |
1154 | int r; | |
1155 | struct usb_device *udev = interface_to_usbdev(intf); | |
459c51ad DD |
1156 | struct zd_usb *usb; |
1157 | struct ieee80211_hw *hw = NULL; | |
e85d0918 DD |
1158 | |
1159 | print_id(udev); | |
1160 | ||
a1030e92 DD |
1161 | if (id->driver_info & DEVICE_INSTALLER) |
1162 | return eject_installer(intf); | |
1163 | ||
e85d0918 DD |
1164 | switch (udev->speed) { |
1165 | case USB_SPEED_LOW: | |
1166 | case USB_SPEED_FULL: | |
1167 | case USB_SPEED_HIGH: | |
1168 | break; | |
1169 | default: | |
1170 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
1171 | r = -ENODEV; | |
1172 | goto error; | |
1173 | } | |
1174 | ||
459c51ad DD |
1175 | r = usb_reset_device(udev); |
1176 | if (r) { | |
1177 | dev_err(&intf->dev, | |
1178 | "couldn't reset usb device. Error number %d\n", r); | |
1179 | goto error; | |
1180 | } | |
6e3632f6 | 1181 | |
459c51ad DD |
1182 | hw = zd_mac_alloc_hw(intf); |
1183 | if (hw == NULL) { | |
e85d0918 DD |
1184 | r = -ENOMEM; |
1185 | goto error; | |
1186 | } | |
1187 | ||
459c51ad | 1188 | usb = &zd_hw_mac(hw)->chip.usb; |
74553aed | 1189 | usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
e85d0918 | 1190 | |
459c51ad | 1191 | r = zd_mac_preinit_hw(hw); |
e85d0918 DD |
1192 | if (r) { |
1193 | dev_dbg_f(&intf->dev, | |
1194 | "couldn't initialize mac. Error number %d\n", r); | |
1195 | goto error; | |
1196 | } | |
1197 | ||
459c51ad | 1198 | r = ieee80211_register_hw(hw); |
e85d0918 DD |
1199 | if (r) { |
1200 | dev_dbg_f(&intf->dev, | |
459c51ad | 1201 | "couldn't register device. Error number %d\n", r); |
e85d0918 DD |
1202 | goto error; |
1203 | } | |
1204 | ||
1205 | dev_dbg_f(&intf->dev, "successful\n"); | |
459c51ad | 1206 | dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy)); |
e85d0918 DD |
1207 | return 0; |
1208 | error: | |
1209 | usb_reset_device(interface_to_usbdev(intf)); | |
459c51ad DD |
1210 | if (hw) { |
1211 | zd_mac_clear(zd_hw_mac(hw)); | |
1212 | ieee80211_free_hw(hw); | |
1213 | } | |
e85d0918 DD |
1214 | return r; |
1215 | } | |
1216 | ||
1217 | static void disconnect(struct usb_interface *intf) | |
1218 | { | |
459c51ad | 1219 | struct ieee80211_hw *hw = zd_intf_to_hw(intf); |
e0579d57 MP |
1220 | struct zd_mac *mac; |
1221 | struct zd_usb *usb; | |
e85d0918 | 1222 | |
a1030e92 DD |
1223 | /* Either something really bad happened, or we're just dealing with |
1224 | * a DEVICE_INSTALLER. */ | |
459c51ad | 1225 | if (hw == NULL) |
a1030e92 DD |
1226 | return; |
1227 | ||
459c51ad | 1228 | mac = zd_hw_mac(hw); |
e0579d57 MP |
1229 | usb = &mac->chip.usb; |
1230 | ||
e85d0918 DD |
1231 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1232 | ||
459c51ad | 1233 | ieee80211_unregister_hw(hw); |
e85d0918 DD |
1234 | |
1235 | /* Just in case something has gone wrong! */ | |
1236 | zd_usb_disable_rx(usb); | |
1237 | zd_usb_disable_int(usb); | |
1238 | ||
1239 | /* If the disconnect has been caused by a removal of the | |
1240 | * driver module, the reset allows reloading of the driver. If the | |
1241 | * reset will not be executed here, the upload of the firmware in the | |
1242 | * probe function caused by the reloading of the driver will fail. | |
1243 | */ | |
1244 | usb_reset_device(interface_to_usbdev(intf)); | |
1245 | ||
459c51ad DD |
1246 | zd_mac_clear(mac); |
1247 | ieee80211_free_hw(hw); | |
e85d0918 DD |
1248 | dev_dbg(&intf->dev, "disconnected\n"); |
1249 | } | |
1250 | ||
1251 | static struct usb_driver driver = { | |
459c51ad | 1252 | .name = KBUILD_MODNAME, |
e85d0918 DD |
1253 | .id_table = usb_ids, |
1254 | .probe = probe, | |
1255 | .disconnect = disconnect, | |
1256 | }; | |
1257 | ||
bc5f06a8 UK |
1258 | struct workqueue_struct *zd_workqueue; |
1259 | ||
e85d0918 DD |
1260 | static int __init usb_init(void) |
1261 | { | |
1262 | int r; | |
1263 | ||
741fec53 | 1264 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1265 | |
bc5f06a8 UK |
1266 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1267 | if (zd_workqueue == NULL) { | |
741fec53 | 1268 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1269 | return -ENOMEM; |
1270 | } | |
1271 | ||
e85d0918 DD |
1272 | r = usb_register(&driver); |
1273 | if (r) { | |
192b775c | 1274 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1275 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1276 | driver.name, r); | |
e85d0918 DD |
1277 | return r; |
1278 | } | |
1279 | ||
741fec53 | 1280 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1281 | return 0; |
1282 | } | |
1283 | ||
1284 | static void __exit usb_exit(void) | |
1285 | { | |
741fec53 | 1286 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1287 | usb_deregister(&driver); |
bc5f06a8 | 1288 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1289 | } |
1290 | ||
1291 | module_init(usb_init); | |
1292 | module_exit(usb_exit); | |
1293 | ||
1294 | static int usb_int_regs_length(unsigned int count) | |
1295 | { | |
1296 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1297 | } | |
1298 | ||
1299 | static void prepare_read_regs_int(struct zd_usb *usb) | |
1300 | { | |
1301 | struct zd_usb_interrupt *intr = &usb->intr; | |
1302 | ||
a68077de | 1303 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1304 | intr->read_regs_enabled = 1; |
1305 | INIT_COMPLETION(intr->read_regs.completion); | |
a68077de UK |
1306 | spin_unlock_irq(&intr->lock); |
1307 | } | |
1308 | ||
1309 | static void disable_read_regs_int(struct zd_usb *usb) | |
1310 | { | |
1311 | struct zd_usb_interrupt *intr = &usb->intr; | |
1312 | ||
1313 | spin_lock_irq(&intr->lock); | |
1314 | intr->read_regs_enabled = 0; | |
1315 | spin_unlock_irq(&intr->lock); | |
e85d0918 DD |
1316 | } |
1317 | ||
1318 | static int get_results(struct zd_usb *usb, u16 *values, | |
1319 | struct usb_req_read_regs *req, unsigned int count) | |
1320 | { | |
1321 | int r; | |
1322 | int i; | |
1323 | struct zd_usb_interrupt *intr = &usb->intr; | |
1324 | struct read_regs_int *rr = &intr->read_regs; | |
1325 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1326 | ||
a68077de | 1327 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1328 | |
1329 | r = -EIO; | |
1330 | /* The created block size seems to be larger than expected. | |
1331 | * However results appear to be correct. | |
1332 | */ | |
1333 | if (rr->length < usb_int_regs_length(count)) { | |
1334 | dev_dbg_f(zd_usb_dev(usb), | |
1335 | "error: actual length %d less than expected %d\n", | |
1336 | rr->length, usb_int_regs_length(count)); | |
1337 | goto error_unlock; | |
1338 | } | |
1339 | if (rr->length > sizeof(rr->buffer)) { | |
1340 | dev_dbg_f(zd_usb_dev(usb), | |
1341 | "error: actual length %d exceeds buffer size %zu\n", | |
1342 | rr->length, sizeof(rr->buffer)); | |
1343 | goto error_unlock; | |
1344 | } | |
1345 | ||
1346 | for (i = 0; i < count; i++) { | |
1347 | struct reg_data *rd = ®s->regs[i]; | |
1348 | if (rd->addr != req->addr[i]) { | |
1349 | dev_dbg_f(zd_usb_dev(usb), | |
1350 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1351 | le16_to_cpu(rd->addr), | |
1352 | le16_to_cpu(req->addr[i])); | |
1353 | goto error_unlock; | |
1354 | } | |
1355 | values[i] = le16_to_cpu(rd->value); | |
1356 | } | |
1357 | ||
1358 | r = 0; | |
1359 | error_unlock: | |
a68077de | 1360 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1361 | return r; |
1362 | } | |
1363 | ||
1364 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1365 | const zd_addr_t *addresses, unsigned int count) | |
1366 | { | |
1367 | int r; | |
1368 | int i, req_len, actual_req_len; | |
1369 | struct usb_device *udev; | |
1370 | struct usb_req_read_regs *req = NULL; | |
1371 | unsigned long timeout; | |
1372 | ||
1373 | if (count < 1) { | |
1374 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1375 | return -EINVAL; | |
1376 | } | |
1377 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1378 | dev_dbg_f(zd_usb_dev(usb), | |
1379 | "error: count %u exceeds possible max %u\n", | |
1380 | count, USB_MAX_IOREAD16_COUNT); | |
1381 | return -EINVAL; | |
1382 | } | |
1383 | if (in_atomic()) { | |
1384 | dev_dbg_f(zd_usb_dev(usb), | |
1385 | "error: io in atomic context not supported\n"); | |
1386 | return -EWOULDBLOCK; | |
1387 | } | |
1388 | if (!usb_int_enabled(usb)) { | |
1389 | dev_dbg_f(zd_usb_dev(usb), | |
1390 | "error: usb interrupt not enabled\n"); | |
1391 | return -EWOULDBLOCK; | |
1392 | } | |
1393 | ||
1394 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); | |
35c3404e | 1395 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1396 | if (!req) |
1397 | return -ENOMEM; | |
1398 | req->id = cpu_to_le16(USB_REQ_READ_REGS); | |
1399 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1400 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 DD |
1401 | |
1402 | udev = zd_usb_to_usbdev(usb); | |
1403 | prepare_read_regs_int(usb); | |
1404 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1405 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1406 | if (r) { | |
1407 | dev_dbg_f(zd_usb_dev(usb), | |
1408 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1409 | goto error; | |
1410 | } | |
1411 | if (req_len != actual_req_len) { | |
1412 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n" | |
1413 | " req_len %d != actual_req_len %d\n", | |
1414 | req_len, actual_req_len); | |
1415 | r = -EIO; | |
1416 | goto error; | |
1417 | } | |
1418 | ||
1419 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
1420 | msecs_to_jiffies(1000)); | |
1421 | if (!timeout) { | |
1422 | disable_read_regs_int(usb); | |
1423 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1424 | r = -ETIMEDOUT; | |
1425 | goto error; | |
1426 | } | |
1427 | ||
1428 | r = get_results(usb, values, req, count); | |
1429 | error: | |
1430 | kfree(req); | |
1431 | return r; | |
1432 | } | |
1433 | ||
1434 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, | |
1435 | unsigned int count) | |
1436 | { | |
1437 | int r; | |
1438 | struct usb_device *udev; | |
1439 | struct usb_req_write_regs *req = NULL; | |
1440 | int i, req_len, actual_req_len; | |
1441 | ||
1442 | if (count == 0) | |
1443 | return 0; | |
1444 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1445 | dev_dbg_f(zd_usb_dev(usb), | |
1446 | "error: count %u exceeds possible max %u\n", | |
1447 | count, USB_MAX_IOWRITE16_COUNT); | |
1448 | return -EINVAL; | |
1449 | } | |
1450 | if (in_atomic()) { | |
1451 | dev_dbg_f(zd_usb_dev(usb), | |
1452 | "error: io in atomic context not supported\n"); | |
1453 | return -EWOULDBLOCK; | |
1454 | } | |
1455 | ||
1456 | req_len = sizeof(struct usb_req_write_regs) + | |
1457 | count * sizeof(struct reg_data); | |
35c3404e | 1458 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1459 | if (!req) |
1460 | return -ENOMEM; | |
1461 | ||
1462 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1463 | for (i = 0; i < count; i++) { | |
1464 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1465 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1466 | rw->value = cpu_to_le16(ioreqs[i].value); |
1467 | } | |
1468 | ||
1469 | udev = zd_usb_to_usbdev(usb); | |
1470 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1471 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1472 | if (r) { | |
1473 | dev_dbg_f(zd_usb_dev(usb), | |
1474 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1475 | goto error; | |
1476 | } | |
1477 | if (req_len != actual_req_len) { | |
1478 | dev_dbg_f(zd_usb_dev(usb), | |
1479 | "error in usb_bulk_msg()" | |
1480 | " req_len %d != actual_req_len %d\n", | |
1481 | req_len, actual_req_len); | |
1482 | r = -EIO; | |
1483 | goto error; | |
1484 | } | |
1485 | ||
1486 | /* FALL-THROUGH with r == 0 */ | |
1487 | error: | |
1488 | kfree(req); | |
1489 | return r; | |
1490 | } | |
1491 | ||
1492 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) | |
1493 | { | |
1494 | int r; | |
1495 | struct usb_device *udev; | |
1496 | struct usb_req_rfwrite *req = NULL; | |
1497 | int i, req_len, actual_req_len; | |
1498 | u16 bit_value_template; | |
1499 | ||
1500 | if (in_atomic()) { | |
1501 | dev_dbg_f(zd_usb_dev(usb), | |
1502 | "error: io in atomic context not supported\n"); | |
1503 | return -EWOULDBLOCK; | |
1504 | } | |
1505 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1506 | dev_dbg_f(zd_usb_dev(usb), | |
1507 | "error: bits %d are smaller than" | |
1508 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1509 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1510 | return -EINVAL; | |
1511 | } | |
1512 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1513 | dev_dbg_f(zd_usb_dev(usb), | |
1514 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
1515 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
1516 | return -EINVAL; | |
1517 | } | |
1518 | #ifdef DEBUG | |
1519 | if (value & (~0UL << bits)) { | |
1520 | dev_dbg_f(zd_usb_dev(usb), | |
1521 | "error: value %#09x has bits >= %d set\n", | |
1522 | value, bits); | |
1523 | return -EINVAL; | |
1524 | } | |
1525 | #endif /* DEBUG */ | |
1526 | ||
1527 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
1528 | ||
1529 | r = zd_usb_ioread16(usb, &bit_value_template, CR203); | |
1530 | if (r) { | |
1531 | dev_dbg_f(zd_usb_dev(usb), | |
1532 | "error %d: Couldn't read CR203\n", r); | |
1533 | goto out; | |
1534 | } | |
1535 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
1536 | ||
1537 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); | |
35c3404e | 1538 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1539 | if (!req) |
1540 | return -ENOMEM; | |
1541 | ||
1542 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
1543 | /* 1: 3683a, but not used in ZYDAS driver */ | |
1544 | req->value = cpu_to_le16(2); | |
1545 | req->bits = cpu_to_le16(bits); | |
1546 | ||
1547 | for (i = 0; i < bits; i++) { | |
1548 | u16 bv = bit_value_template; | |
1549 | if (value & (1 << (bits-1-i))) | |
1550 | bv |= RF_DATA; | |
1551 | req->bit_values[i] = cpu_to_le16(bv); | |
1552 | } | |
1553 | ||
1554 | udev = zd_usb_to_usbdev(usb); | |
1555 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1556 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1557 | if (r) { | |
1558 | dev_dbg_f(zd_usb_dev(usb), | |
1559 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1560 | goto out; | |
1561 | } | |
1562 | if (req_len != actual_req_len) { | |
1563 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()" | |
1564 | " req_len %d != actual_req_len %d\n", | |
1565 | req_len, actual_req_len); | |
1566 | r = -EIO; | |
1567 | goto out; | |
1568 | } | |
1569 | ||
1570 | /* FALL-THROUGH with r == 0 */ | |
1571 | out: | |
1572 | kfree(req); | |
1573 | return r; | |
1574 | } |