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Commit | Line | Data |
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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 | |
38 | static 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 }, |
229782a3 | 58 | { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 }, |
269fca0e | 59 | { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
60 | { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 }, |
61 | { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 }, | |
62 | { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, | |
63 | { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 64 | /* ZD1211B */ |
3bfbe80e | 65 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
ad580db5 | 66 | { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
67 | { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
68 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
69 | { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B }, | |
70 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, | |
8b339d05 | 71 | { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
72 | { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B }, |
73 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, | |
74 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
75 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, | |
76 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, | |
dd2f5538 | 77 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
78 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B }, |
79 | { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B }, | |
80 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, | |
8f75e07a | 81 | { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B }, |
f72151fb | 82 | { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B }, |
9dfd5500 | 83 | { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
84 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, |
85 | { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B }, | |
aec91028 | 86 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
c445a31c | 87 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
8e97afe5 | 88 | { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
de262496 | 89 | { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
90 | { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
91 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, | |
92 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, | |
93 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, | |
94 | { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, | |
a1030e92 DD |
95 | /* "Driverless" devices that need ejecting */ |
96 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 97 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
98 | {} |
99 | }; | |
100 | ||
101 | MODULE_LICENSE("GPL"); | |
102 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
103 | MODULE_AUTHOR("Ulrich Kunitz"); | |
104 | MODULE_AUTHOR("Daniel Drake"); | |
105 | MODULE_VERSION("1.0"); | |
106 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
107 | ||
108 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
109 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
110 | ||
e85d0918 | 111 | /* USB device initialization */ |
72e77a8a | 112 | static void int_urb_complete(struct urb *urb); |
e85d0918 DD |
113 | |
114 | static int request_fw_file( | |
115 | const struct firmware **fw, const char *name, struct device *device) | |
116 | { | |
117 | int r; | |
118 | ||
119 | dev_dbg_f(device, "fw name %s\n", name); | |
120 | ||
121 | r = request_firmware(fw, name, device); | |
122 | if (r) | |
123 | dev_err(device, | |
124 | "Could not load firmware file %s. Error number %d\n", | |
125 | name, r); | |
126 | return r; | |
127 | } | |
128 | ||
129 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
130 | { | |
131 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
132 | } | |
133 | ||
134 | enum upload_code_flags { | |
135 | REBOOT = 1, | |
136 | }; | |
137 | ||
138 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
139 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
140 | ||
141 | static int upload_code(struct usb_device *udev, | |
142 | const u8 *data, size_t size, u16 code_offset, int flags) | |
143 | { | |
144 | u8 *p; | |
145 | int r; | |
146 | ||
147 | /* USB request blocks need "kmalloced" buffers. | |
148 | */ | |
149 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
150 | if (!p) { | |
151 | dev_err(&udev->dev, "out of memory\n"); | |
152 | r = -ENOMEM; | |
153 | goto error; | |
154 | } | |
155 | ||
156 | size &= ~1; | |
157 | while (size > 0) { | |
158 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
159 | size : MAX_TRANSFER_SIZE; | |
160 | ||
161 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
162 | ||
163 | memcpy(p, data, transfer_size); | |
164 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
165 | USB_REQ_FIRMWARE_DOWNLOAD, | |
166 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
167 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
168 | if (r < 0) { | |
169 | dev_err(&udev->dev, | |
170 | "USB control request for firmware upload" | |
171 | " failed. Error number %d\n", r); | |
172 | goto error; | |
173 | } | |
174 | transfer_size = r & ~1; | |
175 | ||
176 | size -= transfer_size; | |
177 | data += transfer_size; | |
178 | code_offset += transfer_size/sizeof(u16); | |
179 | } | |
180 | ||
181 | if (flags & REBOOT) { | |
182 | u8 ret; | |
183 | ||
a8c4ea7a | 184 | /* Use "DMA-aware" buffer. */ |
e85d0918 DD |
185 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
186 | USB_REQ_FIRMWARE_CONFIRM, | |
187 | USB_DIR_IN | USB_TYPE_VENDOR, | |
a8c4ea7a | 188 | 0, 0, p, sizeof(ret), 5000 /* ms */); |
e85d0918 DD |
189 | if (r != sizeof(ret)) { |
190 | dev_err(&udev->dev, | |
191 | "control request firmeware confirmation failed." | |
192 | " Return value %d\n", r); | |
193 | if (r >= 0) | |
194 | r = -ENODEV; | |
195 | goto error; | |
196 | } | |
a8c4ea7a | 197 | ret = p[0]; |
e85d0918 DD |
198 | if (ret & 0x80) { |
199 | dev_err(&udev->dev, | |
200 | "Internal error while downloading." | |
201 | " Firmware confirm return value %#04x\n", | |
202 | (unsigned int)ret); | |
203 | r = -ENODEV; | |
204 | goto error; | |
205 | } | |
206 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
207 | (unsigned int)ret); | |
208 | } | |
209 | ||
210 | r = 0; | |
211 | error: | |
212 | kfree(p); | |
213 | return r; | |
214 | } | |
215 | ||
216 | static u16 get_word(const void *data, u16 offset) | |
217 | { | |
218 | const __le16 *p = data; | |
219 | return le16_to_cpu(p[offset]); | |
220 | } | |
221 | ||
74553aed | 222 | static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
e85d0918 DD |
223 | const char* postfix) |
224 | { | |
225 | scnprintf(buffer, size, "%s%s", | |
74553aed | 226 | usb->is_zd1211b ? |
e85d0918 DD |
227 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
228 | postfix); | |
229 | return buffer; | |
230 | } | |
231 | ||
74553aed | 232 | static int handle_version_mismatch(struct zd_usb *usb, |
d066c219 DD |
233 | const struct firmware *ub_fw) |
234 | { | |
74553aed | 235 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
d066c219 DD |
236 | const struct firmware *ur_fw = NULL; |
237 | int offset; | |
238 | int r = 0; | |
239 | char fw_name[128]; | |
240 | ||
241 | r = request_fw_file(&ur_fw, | |
74553aed | 242 | get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
d066c219 DD |
243 | &udev->dev); |
244 | if (r) | |
245 | goto error; | |
246 | ||
ee302767 | 247 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
248 | if (r) |
249 | goto error; | |
250 | ||
ee302767 | 251 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 252 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 253 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
254 | |
255 | /* At this point, the vendor driver downloads the whole firmware | |
256 | * image, hacks around with version IDs, and uploads it again, | |
257 | * completely overwriting the boot code. We do not do this here as | |
258 | * it is not required on any tested devices, and it is suspected to | |
259 | * cause problems. */ | |
260 | error: | |
261 | release_firmware(ur_fw); | |
262 | return r; | |
263 | } | |
264 | ||
74553aed | 265 | static int upload_firmware(struct zd_usb *usb) |
e85d0918 DD |
266 | { |
267 | int r; | |
268 | u16 fw_bcdDevice; | |
269 | u16 bcdDevice; | |
74553aed | 270 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
271 | const struct firmware *ub_fw = NULL; |
272 | const struct firmware *uph_fw = NULL; | |
273 | char fw_name[128]; | |
274 | ||
275 | bcdDevice = get_bcdDevice(udev); | |
276 | ||
277 | r = request_fw_file(&ub_fw, | |
74553aed | 278 | get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
e85d0918 DD |
279 | &udev->dev); |
280 | if (r) | |
281 | goto error; | |
282 | ||
ee302767 | 283 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 284 | |
e85d0918 DD |
285 | if (fw_bcdDevice != bcdDevice) { |
286 | dev_info(&udev->dev, | |
d066c219 DD |
287 | "firmware version %#06x and device bootcode version " |
288 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
289 | if (bcdDevice <= 0x4313) | |
290 | dev_warn(&udev->dev, "device has old bootcode, please " | |
291 | "report success or failure\n"); | |
292 | ||
74553aed | 293 | r = handle_version_mismatch(usb, ub_fw); |
d066c219 DD |
294 | if (r) |
295 | goto error; | |
e85d0918 DD |
296 | } else { |
297 | dev_dbg_f(&udev->dev, | |
298 | "firmware device id %#06x is equal to the " | |
299 | "actual device id\n", fw_bcdDevice); | |
300 | } | |
301 | ||
302 | ||
303 | r = request_fw_file(&uph_fw, | |
74553aed | 304 | get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
e85d0918 DD |
305 | &udev->dev); |
306 | if (r) | |
307 | goto error; | |
308 | ||
ee302767 | 309 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
310 | if (r) { |
311 | dev_err(&udev->dev, | |
312 | "Could not upload firmware code uph. Error number %d\n", | |
313 | r); | |
314 | } | |
315 | ||
316 | /* FALL-THROUGH */ | |
317 | error: | |
318 | release_firmware(ub_fw); | |
319 | release_firmware(uph_fw); | |
320 | return r; | |
321 | } | |
322 | ||
3e8b4d00 BH |
323 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur"); |
324 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur"); | |
325 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub"); | |
326 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub"); | |
327 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr"); | |
328 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr"); | |
329 | ||
74553aed DD |
330 | /* Read data from device address space using "firmware interface" which does |
331 | * not require firmware to be loaded. */ | |
332 | int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) | |
333 | { | |
334 | int r; | |
335 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
a8c4ea7a | 336 | u8 *buf; |
74553aed | 337 | |
a8c4ea7a AN |
338 | /* Use "DMA-aware" buffer. */ |
339 | buf = kmalloc(len, GFP_KERNEL); | |
340 | if (!buf) | |
341 | return -ENOMEM; | |
74553aed DD |
342 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
343 | USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, | |
a8c4ea7a | 344 | buf, len, 5000); |
74553aed DD |
345 | if (r < 0) { |
346 | dev_err(&udev->dev, | |
347 | "read over firmware interface failed: %d\n", r); | |
a8c4ea7a | 348 | goto exit; |
74553aed DD |
349 | } else if (r != len) { |
350 | dev_err(&udev->dev, | |
351 | "incomplete read over firmware interface: %d/%d\n", | |
352 | r, len); | |
a8c4ea7a AN |
353 | r = -EIO; |
354 | goto exit; | |
74553aed | 355 | } |
a8c4ea7a AN |
356 | r = 0; |
357 | memcpy(data, buf, len); | |
358 | exit: | |
359 | kfree(buf); | |
360 | return r; | |
74553aed DD |
361 | } |
362 | ||
e85d0918 DD |
363 | #define urb_dev(urb) (&(urb)->dev->dev) |
364 | ||
365 | static inline void handle_regs_int(struct urb *urb) | |
366 | { | |
367 | struct zd_usb *usb = urb->context; | |
368 | struct zd_usb_interrupt *intr = &usb->intr; | |
369 | int len; | |
72e77a8a | 370 | u16 int_num; |
e85d0918 DD |
371 | |
372 | ZD_ASSERT(in_interrupt()); | |
373 | spin_lock(&intr->lock); | |
374 | ||
d63ddcec | 375 | int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); |
72e77a8a LCC |
376 | if (int_num == CR_INTERRUPT) { |
377 | struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); | |
378 | memcpy(&mac->intr_buffer, urb->transfer_buffer, | |
379 | USB_MAX_EP_INT_BUFFER); | |
380 | schedule_work(&mac->process_intr); | |
381 | } else if (intr->read_regs_enabled) { | |
e85d0918 DD |
382 | intr->read_regs.length = len = urb->actual_length; |
383 | ||
384 | if (len > sizeof(intr->read_regs.buffer)) | |
385 | len = sizeof(intr->read_regs.buffer); | |
386 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); | |
387 | intr->read_regs_enabled = 0; | |
388 | complete(&intr->read_regs.completion); | |
389 | goto out; | |
390 | } | |
391 | ||
e85d0918 DD |
392 | out: |
393 | spin_unlock(&intr->lock); | |
394 | } | |
395 | ||
7d12e780 | 396 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
397 | { |
398 | int r; | |
399 | struct usb_int_header *hdr; | |
400 | ||
401 | switch (urb->status) { | |
402 | case 0: | |
403 | break; | |
404 | case -ESHUTDOWN: | |
405 | case -EINVAL: | |
406 | case -ENODEV: | |
407 | case -ENOENT: | |
408 | case -ECONNRESET: | |
e85d0918 | 409 | case -EPIPE: |
b312d799 | 410 | goto kfree; |
e85d0918 DD |
411 | default: |
412 | goto resubmit; | |
413 | } | |
414 | ||
415 | if (urb->actual_length < sizeof(hdr)) { | |
416 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
417 | goto resubmit; | |
418 | } | |
419 | ||
420 | hdr = urb->transfer_buffer; | |
421 | if (hdr->type != USB_INT_TYPE) { | |
422 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
423 | goto resubmit; | |
424 | } | |
425 | ||
426 | switch (hdr->id) { | |
427 | case USB_INT_ID_REGS: | |
428 | handle_regs_int(urb); | |
429 | break; | |
430 | case USB_INT_ID_RETRY_FAILED: | |
7f4013f0 | 431 | zd_mac_tx_failed(urb); |
e85d0918 DD |
432 | break; |
433 | default: | |
434 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
435 | (unsigned int)hdr->id); | |
436 | goto resubmit; | |
437 | } | |
438 | ||
439 | resubmit: | |
440 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
441 | if (r) { | |
442 | dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb); | |
443 | goto kfree; | |
444 | } | |
445 | return; | |
446 | kfree: | |
447 | kfree(urb->transfer_buffer); | |
448 | } | |
449 | ||
450 | static inline int int_urb_interval(struct usb_device *udev) | |
451 | { | |
452 | switch (udev->speed) { | |
453 | case USB_SPEED_HIGH: | |
454 | return 4; | |
455 | case USB_SPEED_LOW: | |
456 | return 10; | |
457 | case USB_SPEED_FULL: | |
458 | default: | |
459 | return 1; | |
460 | } | |
461 | } | |
462 | ||
463 | static inline int usb_int_enabled(struct zd_usb *usb) | |
464 | { | |
465 | unsigned long flags; | |
466 | struct zd_usb_interrupt *intr = &usb->intr; | |
467 | struct urb *urb; | |
468 | ||
469 | spin_lock_irqsave(&intr->lock, flags); | |
470 | urb = intr->urb; | |
471 | spin_unlock_irqrestore(&intr->lock, flags); | |
472 | return urb != NULL; | |
473 | } | |
474 | ||
475 | int zd_usb_enable_int(struct zd_usb *usb) | |
476 | { | |
477 | int r; | |
478 | struct usb_device *udev; | |
479 | struct zd_usb_interrupt *intr = &usb->intr; | |
480 | void *transfer_buffer = NULL; | |
481 | struct urb *urb; | |
482 | ||
483 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
484 | ||
35c3404e | 485 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
486 | if (!urb) { |
487 | r = -ENOMEM; | |
488 | goto out; | |
489 | } | |
490 | ||
491 | ZD_ASSERT(!irqs_disabled()); | |
492 | spin_lock_irq(&intr->lock); | |
493 | if (intr->urb) { | |
494 | spin_unlock_irq(&intr->lock); | |
495 | r = 0; | |
496 | goto error_free_urb; | |
497 | } | |
498 | intr->urb = urb; | |
499 | spin_unlock_irq(&intr->lock); | |
500 | ||
501 | /* TODO: make it a DMA buffer */ | |
502 | r = -ENOMEM; | |
35c3404e | 503 | transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL); |
e85d0918 DD |
504 | if (!transfer_buffer) { |
505 | dev_dbg_f(zd_usb_dev(usb), | |
506 | "couldn't allocate transfer_buffer\n"); | |
507 | goto error_set_urb_null; | |
508 | } | |
509 | ||
510 | udev = zd_usb_to_usbdev(usb); | |
511 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), | |
512 | transfer_buffer, USB_MAX_EP_INT_BUFFER, | |
513 | int_urb_complete, usb, | |
514 | intr->interval); | |
515 | ||
516 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 517 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
518 | if (r) { |
519 | dev_dbg_f(zd_usb_dev(usb), | |
520 | "Couldn't submit urb. Error number %d\n", r); | |
521 | goto error; | |
522 | } | |
523 | ||
524 | return 0; | |
525 | error: | |
526 | kfree(transfer_buffer); | |
527 | error_set_urb_null: | |
528 | spin_lock_irq(&intr->lock); | |
529 | intr->urb = NULL; | |
530 | spin_unlock_irq(&intr->lock); | |
531 | error_free_urb: | |
532 | usb_free_urb(urb); | |
533 | out: | |
534 | return r; | |
535 | } | |
536 | ||
537 | void zd_usb_disable_int(struct zd_usb *usb) | |
538 | { | |
539 | unsigned long flags; | |
540 | struct zd_usb_interrupt *intr = &usb->intr; | |
541 | struct urb *urb; | |
542 | ||
543 | spin_lock_irqsave(&intr->lock, flags); | |
544 | urb = intr->urb; | |
545 | if (!urb) { | |
546 | spin_unlock_irqrestore(&intr->lock, flags); | |
547 | return; | |
548 | } | |
549 | intr->urb = NULL; | |
550 | spin_unlock_irqrestore(&intr->lock, flags); | |
551 | ||
552 | usb_kill_urb(urb); | |
553 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
554 | usb_free_urb(urb); | |
555 | } | |
556 | ||
557 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
558 | unsigned int length) | |
559 | { | |
560 | int i; | |
e85d0918 DD |
561 | const struct rx_length_info *length_info; |
562 | ||
563 | if (length < sizeof(struct rx_length_info)) { | |
564 | /* It's not a complete packet anyhow. */ | |
7f4013f0 BP |
565 | printk("%s: invalid, small RX packet : %d\n", |
566 | __func__, length); | |
e85d0918 DD |
567 | return; |
568 | } | |
569 | length_info = (struct rx_length_info *) | |
570 | (buffer + length - sizeof(struct rx_length_info)); | |
571 | ||
572 | /* It might be that three frames are merged into a single URB | |
573 | * transaction. We have to check for the length info tag. | |
574 | * | |
575 | * While testing we discovered that length_info might be unaligned, | |
576 | * because if USB transactions are merged, the last packet will not | |
577 | * be padded. Unaligned access might also happen if the length_info | |
578 | * structure is not present. | |
579 | */ | |
533dd1b0 | 580 | if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG) |
b269825b | 581 | { |
e85d0918 DD |
582 | unsigned int l, k, n; |
583 | for (i = 0, l = 0;; i++) { | |
533dd1b0 | 584 | k = get_unaligned_le16(&length_info->length[i]); |
850c211c UK |
585 | if (k == 0) |
586 | return; | |
e85d0918 DD |
587 | n = l+k; |
588 | if (n > length) | |
589 | return; | |
459c51ad | 590 | zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k); |
e85d0918 DD |
591 | if (i >= 2) |
592 | return; | |
593 | l = (n+3) & ~3; | |
594 | } | |
595 | } else { | |
459c51ad | 596 | zd_mac_rx(zd_usb_to_hw(usb), buffer, length); |
e85d0918 DD |
597 | } |
598 | } | |
599 | ||
7d12e780 | 600 | static void rx_urb_complete(struct urb *urb) |
e85d0918 DD |
601 | { |
602 | struct zd_usb *usb; | |
603 | struct zd_usb_rx *rx; | |
604 | const u8 *buffer; | |
605 | unsigned int length; | |
606 | ||
607 | switch (urb->status) { | |
608 | case 0: | |
609 | break; | |
610 | case -ESHUTDOWN: | |
611 | case -EINVAL: | |
612 | case -ENODEV: | |
613 | case -ENOENT: | |
614 | case -ECONNRESET: | |
e85d0918 | 615 | case -EPIPE: |
b312d799 | 616 | return; |
e85d0918 DD |
617 | default: |
618 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
619 | goto resubmit; | |
620 | } | |
621 | ||
622 | buffer = urb->transfer_buffer; | |
623 | length = urb->actual_length; | |
624 | usb = urb->context; | |
625 | rx = &usb->rx; | |
626 | ||
627 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { | |
628 | /* If there is an old first fragment, we don't care. */ | |
629 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
630 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
631 | spin_lock(&rx->lock); | |
632 | memcpy(rx->fragment, buffer, length); | |
633 | rx->fragment_length = length; | |
634 | spin_unlock(&rx->lock); | |
635 | goto resubmit; | |
636 | } | |
637 | ||
638 | spin_lock(&rx->lock); | |
639 | if (rx->fragment_length > 0) { | |
640 | /* We are on a second fragment, we believe */ | |
641 | ZD_ASSERT(length + rx->fragment_length <= | |
642 | ARRAY_SIZE(rx->fragment)); | |
643 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
644 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
645 | handle_rx_packet(usb, rx->fragment, | |
646 | rx->fragment_length + length); | |
647 | rx->fragment_length = 0; | |
648 | spin_unlock(&rx->lock); | |
649 | } else { | |
650 | spin_unlock(&rx->lock); | |
651 | handle_rx_packet(usb, buffer, length); | |
652 | } | |
653 | ||
654 | resubmit: | |
655 | usb_submit_urb(urb, GFP_ATOMIC); | |
656 | } | |
657 | ||
459c51ad | 658 | static struct urb *alloc_rx_urb(struct zd_usb *usb) |
e85d0918 DD |
659 | { |
660 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
661 | struct urb *urb; | |
662 | void *buffer; | |
663 | ||
35c3404e | 664 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
665 | if (!urb) |
666 | return NULL; | |
35c3404e | 667 | buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
e85d0918 DD |
668 | &urb->transfer_dma); |
669 | if (!buffer) { | |
670 | usb_free_urb(urb); | |
671 | return NULL; | |
672 | } | |
673 | ||
674 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
675 | buffer, USB_MAX_RX_SIZE, | |
676 | rx_urb_complete, usb); | |
677 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
678 | ||
679 | return urb; | |
680 | } | |
681 | ||
459c51ad | 682 | static void free_rx_urb(struct urb *urb) |
e85d0918 DD |
683 | { |
684 | if (!urb) | |
685 | return; | |
686 | usb_buffer_free(urb->dev, urb->transfer_buffer_length, | |
687 | urb->transfer_buffer, urb->transfer_dma); | |
688 | usb_free_urb(urb); | |
689 | } | |
690 | ||
691 | int zd_usb_enable_rx(struct zd_usb *usb) | |
692 | { | |
693 | int i, r; | |
694 | struct zd_usb_rx *rx = &usb->rx; | |
695 | struct urb **urbs; | |
696 | ||
697 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
698 | ||
699 | r = -ENOMEM; | |
459c51ad | 700 | urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
701 | if (!urbs) |
702 | goto error; | |
459c51ad DD |
703 | for (i = 0; i < RX_URBS_COUNT; i++) { |
704 | urbs[i] = alloc_rx_urb(usb); | |
e85d0918 DD |
705 | if (!urbs[i]) |
706 | goto error; | |
707 | } | |
708 | ||
709 | ZD_ASSERT(!irqs_disabled()); | |
710 | spin_lock_irq(&rx->lock); | |
711 | if (rx->urbs) { | |
712 | spin_unlock_irq(&rx->lock); | |
713 | r = 0; | |
714 | goto error; | |
715 | } | |
716 | rx->urbs = urbs; | |
459c51ad | 717 | rx->urbs_count = RX_URBS_COUNT; |
e85d0918 DD |
718 | spin_unlock_irq(&rx->lock); |
719 | ||
459c51ad | 720 | for (i = 0; i < RX_URBS_COUNT; i++) { |
35c3404e | 721 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
722 | if (r) |
723 | goto error_submit; | |
724 | } | |
725 | ||
726 | return 0; | |
727 | error_submit: | |
459c51ad | 728 | for (i = 0; i < RX_URBS_COUNT; i++) { |
e85d0918 DD |
729 | usb_kill_urb(urbs[i]); |
730 | } | |
731 | spin_lock_irq(&rx->lock); | |
732 | rx->urbs = NULL; | |
733 | rx->urbs_count = 0; | |
734 | spin_unlock_irq(&rx->lock); | |
735 | error: | |
736 | if (urbs) { | |
459c51ad DD |
737 | for (i = 0; i < RX_URBS_COUNT; i++) |
738 | free_rx_urb(urbs[i]); | |
e85d0918 DD |
739 | } |
740 | return r; | |
741 | } | |
742 | ||
743 | void zd_usb_disable_rx(struct zd_usb *usb) | |
744 | { | |
745 | int i; | |
746 | unsigned long flags; | |
747 | struct urb **urbs; | |
748 | unsigned int count; | |
749 | struct zd_usb_rx *rx = &usb->rx; | |
750 | ||
751 | spin_lock_irqsave(&rx->lock, flags); | |
752 | urbs = rx->urbs; | |
753 | count = rx->urbs_count; | |
754 | spin_unlock_irqrestore(&rx->lock, flags); | |
755 | if (!urbs) | |
756 | return; | |
757 | ||
758 | for (i = 0; i < count; i++) { | |
759 | usb_kill_urb(urbs[i]); | |
459c51ad | 760 | free_rx_urb(urbs[i]); |
e85d0918 DD |
761 | } |
762 | kfree(urbs); | |
763 | ||
764 | spin_lock_irqsave(&rx->lock, flags); | |
765 | rx->urbs = NULL; | |
766 | rx->urbs_count = 0; | |
767 | spin_unlock_irqrestore(&rx->lock, flags); | |
768 | } | |
769 | ||
459c51ad DD |
770 | /** |
771 | * zd_usb_disable_tx - disable transmission | |
772 | * @usb: the zd1211rw-private USB structure | |
773 | * | |
774 | * Frees all URBs in the free list and marks the transmission as disabled. | |
775 | */ | |
776 | void zd_usb_disable_tx(struct zd_usb *usb) | |
777 | { | |
778 | struct zd_usb_tx *tx = &usb->tx; | |
779 | unsigned long flags; | |
780 | struct list_head *pos, *n; | |
781 | ||
782 | spin_lock_irqsave(&tx->lock, flags); | |
783 | list_for_each_safe(pos, n, &tx->free_urb_list) { | |
784 | list_del(pos); | |
785 | usb_free_urb(list_entry(pos, struct urb, urb_list)); | |
786 | } | |
787 | tx->enabled = 0; | |
788 | tx->submitted_urbs = 0; | |
789 | /* The stopped state is ignored, relying on ieee80211_wake_queues() | |
790 | * in a potentionally following zd_usb_enable_tx(). | |
791 | */ | |
792 | spin_unlock_irqrestore(&tx->lock, flags); | |
793 | } | |
794 | ||
795 | /** | |
796 | * zd_usb_enable_tx - enables transmission | |
797 | * @usb: a &struct zd_usb pointer | |
798 | * | |
799 | * This function enables transmission and prepares the &zd_usb_tx data | |
800 | * structure. | |
801 | */ | |
802 | void zd_usb_enable_tx(struct zd_usb *usb) | |
803 | { | |
804 | unsigned long flags; | |
805 | struct zd_usb_tx *tx = &usb->tx; | |
806 | ||
807 | spin_lock_irqsave(&tx->lock, flags); | |
808 | tx->enabled = 1; | |
809 | tx->submitted_urbs = 0; | |
810 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
811 | tx->stopped = 0; | |
812 | spin_unlock_irqrestore(&tx->lock, flags); | |
813 | } | |
814 | ||
815 | /** | |
816 | * alloc_tx_urb - provides an tx URB | |
817 | * @usb: a &struct zd_usb pointer | |
818 | * | |
819 | * Allocates a new URB. If possible takes the urb from the free list in | |
820 | * usb->tx. | |
821 | */ | |
822 | static struct urb *alloc_tx_urb(struct zd_usb *usb) | |
823 | { | |
824 | struct zd_usb_tx *tx = &usb->tx; | |
825 | unsigned long flags; | |
826 | struct list_head *entry; | |
827 | struct urb *urb; | |
828 | ||
829 | spin_lock_irqsave(&tx->lock, flags); | |
830 | if (list_empty(&tx->free_urb_list)) { | |
831 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
832 | goto out; | |
833 | } | |
834 | entry = tx->free_urb_list.next; | |
835 | list_del(entry); | |
836 | urb = list_entry(entry, struct urb, urb_list); | |
837 | out: | |
838 | spin_unlock_irqrestore(&tx->lock, flags); | |
839 | return urb; | |
840 | } | |
841 | ||
842 | /** | |
843 | * free_tx_urb - frees a used tx URB | |
844 | * @usb: a &struct zd_usb pointer | |
845 | * @urb: URB to be freed | |
846 | * | |
847 | * Frees the the transmission URB, which means to put it on the free URB | |
848 | * list. | |
849 | */ | |
850 | static void free_tx_urb(struct zd_usb *usb, struct urb *urb) | |
851 | { | |
852 | struct zd_usb_tx *tx = &usb->tx; | |
853 | unsigned long flags; | |
854 | ||
855 | spin_lock_irqsave(&tx->lock, flags); | |
856 | if (!tx->enabled) { | |
857 | usb_free_urb(urb); | |
858 | goto out; | |
859 | } | |
860 | list_add(&urb->urb_list, &tx->free_urb_list); | |
861 | out: | |
862 | spin_unlock_irqrestore(&tx->lock, flags); | |
863 | } | |
864 | ||
865 | static void tx_dec_submitted_urbs(struct zd_usb *usb) | |
866 | { | |
867 | struct zd_usb_tx *tx = &usb->tx; | |
868 | unsigned long flags; | |
869 | ||
870 | spin_lock_irqsave(&tx->lock, flags); | |
871 | --tx->submitted_urbs; | |
872 | if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) { | |
873 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
874 | tx->stopped = 0; | |
875 | } | |
876 | spin_unlock_irqrestore(&tx->lock, flags); | |
877 | } | |
878 | ||
879 | static void tx_inc_submitted_urbs(struct zd_usb *usb) | |
880 | { | |
881 | struct zd_usb_tx *tx = &usb->tx; | |
882 | unsigned long flags; | |
883 | ||
884 | spin_lock_irqsave(&tx->lock, flags); | |
885 | ++tx->submitted_urbs; | |
886 | if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) { | |
887 | ieee80211_stop_queues(zd_usb_to_hw(usb)); | |
888 | tx->stopped = 1; | |
889 | } | |
890 | spin_unlock_irqrestore(&tx->lock, flags); | |
891 | } | |
892 | ||
893 | /** | |
894 | * tx_urb_complete - completes the execution of an URB | |
895 | * @urb: a URB | |
896 | * | |
897 | * This function is called if the URB has been transferred to a device or an | |
898 | * error has happened. | |
899 | */ | |
7d12e780 | 900 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
901 | { |
902 | int r; | |
459c51ad | 903 | struct sk_buff *skb; |
e039fa4a | 904 | struct ieee80211_tx_info *info; |
459c51ad | 905 | struct zd_usb *usb; |
e85d0918 DD |
906 | |
907 | switch (urb->status) { | |
908 | case 0: | |
909 | break; | |
910 | case -ESHUTDOWN: | |
911 | case -EINVAL: | |
912 | case -ENODEV: | |
913 | case -ENOENT: | |
914 | case -ECONNRESET: | |
b312d799 | 915 | case -EPIPE: |
e85d0918 DD |
916 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
917 | break; | |
e85d0918 DD |
918 | default: |
919 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
920 | goto resubmit; | |
921 | } | |
922 | free_urb: | |
459c51ad | 923 | skb = (struct sk_buff *)urb->context; |
dbabad0c JB |
924 | /* |
925 | * grab 'usb' pointer before handing off the skb (since | |
926 | * it might be freed by zd_mac_tx_to_dev or mac80211) | |
927 | */ | |
e039fa4a | 928 | info = IEEE80211_SKB_CB(skb); |
e6a9854b | 929 | usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb; |
dbabad0c | 930 | zd_mac_tx_to_dev(skb, urb->status); |
459c51ad DD |
931 | free_tx_urb(usb, urb); |
932 | tx_dec_submitted_urbs(usb); | |
e85d0918 DD |
933 | return; |
934 | resubmit: | |
935 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
936 | if (r) { | |
937 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); | |
938 | goto free_urb; | |
939 | } | |
940 | } | |
941 | ||
459c51ad DD |
942 | /** |
943 | * zd_usb_tx: initiates transfer of a frame of the device | |
944 | * | |
945 | * @usb: the zd1211rw-private USB structure | |
946 | * @skb: a &struct sk_buff pointer | |
947 | * | |
948 | * This function tranmits a frame to the device. It doesn't wait for | |
949 | * completion. The frame must contain the control set and have all the | |
950 | * control set information available. | |
951 | * | |
952 | * The function returns 0 if the transfer has been successfully initiated. | |
e85d0918 | 953 | */ |
459c51ad | 954 | int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb) |
e85d0918 DD |
955 | { |
956 | int r; | |
957 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
958 | struct urb *urb; | |
e85d0918 | 959 | |
459c51ad | 960 | urb = alloc_tx_urb(usb); |
e85d0918 DD |
961 | if (!urb) { |
962 | r = -ENOMEM; | |
963 | goto out; | |
964 | } | |
965 | ||
e85d0918 | 966 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
459c51ad | 967 | skb->data, skb->len, tx_urb_complete, skb); |
e85d0918 DD |
968 | |
969 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
970 | if (r) | |
971 | goto error; | |
459c51ad | 972 | tx_inc_submitted_urbs(usb); |
e85d0918 DD |
973 | return 0; |
974 | error: | |
459c51ad | 975 | free_tx_urb(usb, urb); |
e85d0918 DD |
976 | out: |
977 | return r; | |
978 | } | |
979 | ||
980 | static inline void init_usb_interrupt(struct zd_usb *usb) | |
981 | { | |
982 | struct zd_usb_interrupt *intr = &usb->intr; | |
983 | ||
984 | spin_lock_init(&intr->lock); | |
985 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
986 | init_completion(&intr->read_regs.completion); | |
0ce34bc8 | 987 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
988 | } |
989 | ||
990 | static inline void init_usb_rx(struct zd_usb *usb) | |
991 | { | |
992 | struct zd_usb_rx *rx = &usb->rx; | |
993 | spin_lock_init(&rx->lock); | |
994 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { | |
995 | rx->usb_packet_size = 512; | |
996 | } else { | |
997 | rx->usb_packet_size = 64; | |
998 | } | |
999 | ZD_ASSERT(rx->fragment_length == 0); | |
1000 | } | |
1001 | ||
1002 | static inline void init_usb_tx(struct zd_usb *usb) | |
1003 | { | |
459c51ad DD |
1004 | struct zd_usb_tx *tx = &usb->tx; |
1005 | spin_lock_init(&tx->lock); | |
1006 | tx->enabled = 0; | |
1007 | tx->stopped = 0; | |
1008 | INIT_LIST_HEAD(&tx->free_urb_list); | |
1009 | tx->submitted_urbs = 0; | |
e85d0918 DD |
1010 | } |
1011 | ||
459c51ad | 1012 | void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw, |
e85d0918 DD |
1013 | struct usb_interface *intf) |
1014 | { | |
1015 | memset(usb, 0, sizeof(*usb)); | |
1016 | usb->intf = usb_get_intf(intf); | |
459c51ad | 1017 | usb_set_intfdata(usb->intf, hw); |
e85d0918 DD |
1018 | init_usb_interrupt(usb); |
1019 | init_usb_tx(usb); | |
1020 | init_usb_rx(usb); | |
1021 | } | |
1022 | ||
e85d0918 DD |
1023 | void zd_usb_clear(struct zd_usb *usb) |
1024 | { | |
1025 | usb_set_intfdata(usb->intf, NULL); | |
1026 | usb_put_intf(usb->intf); | |
c48cf125 | 1027 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
1028 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
1029 | } | |
1030 | ||
1031 | static const char *speed(enum usb_device_speed speed) | |
1032 | { | |
1033 | switch (speed) { | |
1034 | case USB_SPEED_LOW: | |
1035 | return "low"; | |
1036 | case USB_SPEED_FULL: | |
1037 | return "full"; | |
1038 | case USB_SPEED_HIGH: | |
1039 | return "high"; | |
1040 | default: | |
1041 | return "unknown speed"; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
1046 | { | |
1047 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
1048 | le16_to_cpu(udev->descriptor.idVendor), | |
1049 | le16_to_cpu(udev->descriptor.idProduct), | |
1050 | get_bcdDevice(udev), | |
1051 | speed(udev->speed)); | |
1052 | } | |
1053 | ||
1054 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
1055 | { | |
1056 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
1057 | return scnprint_id(udev, buffer, size); | |
1058 | } | |
1059 | ||
1060 | #ifdef DEBUG | |
1061 | static void print_id(struct usb_device *udev) | |
1062 | { | |
1063 | char buffer[40]; | |
1064 | ||
1065 | scnprint_id(udev, buffer, sizeof(buffer)); | |
1066 | buffer[sizeof(buffer)-1] = 0; | |
1067 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
1068 | } | |
1069 | #else | |
1070 | #define print_id(udev) do { } while (0) | |
1071 | #endif | |
1072 | ||
a1030e92 DD |
1073 | static int eject_installer(struct usb_interface *intf) |
1074 | { | |
1075 | struct usb_device *udev = interface_to_usbdev(intf); | |
1076 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
1077 | struct usb_endpoint_descriptor *endpoint; | |
1078 | unsigned char *cmd; | |
1079 | u8 bulk_out_ep; | |
1080 | int r; | |
1081 | ||
1082 | /* Find bulk out endpoint */ | |
11466f13 SS |
1083 | for (r = 1; r >= 0; r--) { |
1084 | endpoint = &iface_desc->endpoint[r].desc; | |
1085 | if (usb_endpoint_dir_out(endpoint) && | |
1086 | usb_endpoint_xfer_bulk(endpoint)) { | |
1087 | bulk_out_ep = endpoint->bEndpointAddress; | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | if (r == -1) { | |
a1030e92 DD |
1092 | dev_err(&udev->dev, |
1093 | "zd1211rw: Could not find bulk out endpoint\n"); | |
1094 | return -ENODEV; | |
1095 | } | |
1096 | ||
1097 | cmd = kzalloc(31, GFP_KERNEL); | |
1098 | if (cmd == NULL) | |
1099 | return -ENODEV; | |
1100 | ||
1101 | /* USB bulk command block */ | |
1102 | cmd[0] = 0x55; /* bulk command signature */ | |
1103 | cmd[1] = 0x53; /* bulk command signature */ | |
1104 | cmd[2] = 0x42; /* bulk command signature */ | |
1105 | cmd[3] = 0x43; /* bulk command signature */ | |
1106 | cmd[14] = 6; /* command length */ | |
1107 | ||
1108 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
1109 | cmd[19] = 0x2; /* eject disc */ | |
1110 | ||
1111 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
1112 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
1113 | cmd, 31, NULL, 2000); | |
1114 | kfree(cmd); | |
1115 | if (r) | |
1116 | return r; | |
1117 | ||
1118 | /* At this point, the device disconnects and reconnects with the real | |
1119 | * ID numbers. */ | |
1120 | ||
1121 | usb_set_intfdata(intf, NULL); | |
1122 | return 0; | |
1123 | } | |
1124 | ||
74553aed DD |
1125 | int zd_usb_init_hw(struct zd_usb *usb) |
1126 | { | |
1127 | int r; | |
1128 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1129 | ||
1130 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1131 | ||
1132 | r = upload_firmware(usb); | |
1133 | if (r) { | |
1134 | dev_err(zd_usb_dev(usb), | |
1135 | "couldn't load firmware. Error number %d\n", r); | |
1136 | return r; | |
1137 | } | |
1138 | ||
1139 | r = usb_reset_configuration(zd_usb_to_usbdev(usb)); | |
1140 | if (r) { | |
1141 | dev_dbg_f(zd_usb_dev(usb), | |
1142 | "couldn't reset configuration. Error number %d\n", r); | |
1143 | return r; | |
1144 | } | |
1145 | ||
459c51ad | 1146 | r = zd_mac_init_hw(mac->hw); |
74553aed DD |
1147 | if (r) { |
1148 | dev_dbg_f(zd_usb_dev(usb), | |
1149 | "couldn't initialize mac. Error number %d\n", r); | |
1150 | return r; | |
1151 | } | |
1152 | ||
1153 | usb->initialized = 1; | |
1154 | return 0; | |
1155 | } | |
1156 | ||
e85d0918 DD |
1157 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
1158 | { | |
1159 | int r; | |
1160 | struct usb_device *udev = interface_to_usbdev(intf); | |
459c51ad DD |
1161 | struct zd_usb *usb; |
1162 | struct ieee80211_hw *hw = NULL; | |
e85d0918 DD |
1163 | |
1164 | print_id(udev); | |
1165 | ||
a1030e92 DD |
1166 | if (id->driver_info & DEVICE_INSTALLER) |
1167 | return eject_installer(intf); | |
1168 | ||
e85d0918 DD |
1169 | switch (udev->speed) { |
1170 | case USB_SPEED_LOW: | |
1171 | case USB_SPEED_FULL: | |
1172 | case USB_SPEED_HIGH: | |
1173 | break; | |
1174 | default: | |
1175 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
1176 | r = -ENODEV; | |
1177 | goto error; | |
1178 | } | |
1179 | ||
459c51ad DD |
1180 | r = usb_reset_device(udev); |
1181 | if (r) { | |
1182 | dev_err(&intf->dev, | |
1183 | "couldn't reset usb device. Error number %d\n", r); | |
1184 | goto error; | |
1185 | } | |
6e3632f6 | 1186 | |
459c51ad DD |
1187 | hw = zd_mac_alloc_hw(intf); |
1188 | if (hw == NULL) { | |
e85d0918 DD |
1189 | r = -ENOMEM; |
1190 | goto error; | |
1191 | } | |
1192 | ||
459c51ad | 1193 | usb = &zd_hw_mac(hw)->chip.usb; |
74553aed | 1194 | usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
e85d0918 | 1195 | |
459c51ad | 1196 | r = zd_mac_preinit_hw(hw); |
e85d0918 DD |
1197 | if (r) { |
1198 | dev_dbg_f(&intf->dev, | |
1199 | "couldn't initialize mac. Error number %d\n", r); | |
1200 | goto error; | |
1201 | } | |
1202 | ||
459c51ad | 1203 | r = ieee80211_register_hw(hw); |
e85d0918 DD |
1204 | if (r) { |
1205 | dev_dbg_f(&intf->dev, | |
459c51ad | 1206 | "couldn't register device. Error number %d\n", r); |
e85d0918 DD |
1207 | goto error; |
1208 | } | |
1209 | ||
1210 | dev_dbg_f(&intf->dev, "successful\n"); | |
459c51ad | 1211 | dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy)); |
e85d0918 DD |
1212 | return 0; |
1213 | error: | |
1214 | usb_reset_device(interface_to_usbdev(intf)); | |
459c51ad DD |
1215 | if (hw) { |
1216 | zd_mac_clear(zd_hw_mac(hw)); | |
1217 | ieee80211_free_hw(hw); | |
1218 | } | |
e85d0918 DD |
1219 | return r; |
1220 | } | |
1221 | ||
1222 | static void disconnect(struct usb_interface *intf) | |
1223 | { | |
459c51ad | 1224 | struct ieee80211_hw *hw = zd_intf_to_hw(intf); |
e0579d57 MP |
1225 | struct zd_mac *mac; |
1226 | struct zd_usb *usb; | |
e85d0918 | 1227 | |
a1030e92 DD |
1228 | /* Either something really bad happened, or we're just dealing with |
1229 | * a DEVICE_INSTALLER. */ | |
459c51ad | 1230 | if (hw == NULL) |
a1030e92 DD |
1231 | return; |
1232 | ||
459c51ad | 1233 | mac = zd_hw_mac(hw); |
e0579d57 MP |
1234 | usb = &mac->chip.usb; |
1235 | ||
e85d0918 DD |
1236 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1237 | ||
459c51ad | 1238 | ieee80211_unregister_hw(hw); |
e85d0918 DD |
1239 | |
1240 | /* Just in case something has gone wrong! */ | |
1241 | zd_usb_disable_rx(usb); | |
1242 | zd_usb_disable_int(usb); | |
1243 | ||
1244 | /* If the disconnect has been caused by a removal of the | |
1245 | * driver module, the reset allows reloading of the driver. If the | |
1246 | * reset will not be executed here, the upload of the firmware in the | |
1247 | * probe function caused by the reloading of the driver will fail. | |
1248 | */ | |
1249 | usb_reset_device(interface_to_usbdev(intf)); | |
1250 | ||
459c51ad DD |
1251 | zd_mac_clear(mac); |
1252 | ieee80211_free_hw(hw); | |
e85d0918 DD |
1253 | dev_dbg(&intf->dev, "disconnected\n"); |
1254 | } | |
1255 | ||
1256 | static struct usb_driver driver = { | |
459c51ad | 1257 | .name = KBUILD_MODNAME, |
e85d0918 DD |
1258 | .id_table = usb_ids, |
1259 | .probe = probe, | |
1260 | .disconnect = disconnect, | |
1261 | }; | |
1262 | ||
bc5f06a8 UK |
1263 | struct workqueue_struct *zd_workqueue; |
1264 | ||
e85d0918 DD |
1265 | static int __init usb_init(void) |
1266 | { | |
1267 | int r; | |
1268 | ||
741fec53 | 1269 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1270 | |
bc5f06a8 UK |
1271 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1272 | if (zd_workqueue == NULL) { | |
741fec53 | 1273 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1274 | return -ENOMEM; |
1275 | } | |
1276 | ||
e85d0918 DD |
1277 | r = usb_register(&driver); |
1278 | if (r) { | |
192b775c | 1279 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1280 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1281 | driver.name, r); | |
e85d0918 DD |
1282 | return r; |
1283 | } | |
1284 | ||
741fec53 | 1285 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1286 | return 0; |
1287 | } | |
1288 | ||
1289 | static void __exit usb_exit(void) | |
1290 | { | |
741fec53 | 1291 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1292 | usb_deregister(&driver); |
bc5f06a8 | 1293 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1294 | } |
1295 | ||
1296 | module_init(usb_init); | |
1297 | module_exit(usb_exit); | |
1298 | ||
1299 | static int usb_int_regs_length(unsigned int count) | |
1300 | { | |
1301 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1302 | } | |
1303 | ||
1304 | static void prepare_read_regs_int(struct zd_usb *usb) | |
1305 | { | |
1306 | struct zd_usb_interrupt *intr = &usb->intr; | |
1307 | ||
a68077de | 1308 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1309 | intr->read_regs_enabled = 1; |
1310 | INIT_COMPLETION(intr->read_regs.completion); | |
a68077de UK |
1311 | spin_unlock_irq(&intr->lock); |
1312 | } | |
1313 | ||
1314 | static void disable_read_regs_int(struct zd_usb *usb) | |
1315 | { | |
1316 | struct zd_usb_interrupt *intr = &usb->intr; | |
1317 | ||
1318 | spin_lock_irq(&intr->lock); | |
1319 | intr->read_regs_enabled = 0; | |
1320 | spin_unlock_irq(&intr->lock); | |
e85d0918 DD |
1321 | } |
1322 | ||
1323 | static int get_results(struct zd_usb *usb, u16 *values, | |
1324 | struct usb_req_read_regs *req, unsigned int count) | |
1325 | { | |
1326 | int r; | |
1327 | int i; | |
1328 | struct zd_usb_interrupt *intr = &usb->intr; | |
1329 | struct read_regs_int *rr = &intr->read_regs; | |
1330 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1331 | ||
a68077de | 1332 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1333 | |
1334 | r = -EIO; | |
1335 | /* The created block size seems to be larger than expected. | |
1336 | * However results appear to be correct. | |
1337 | */ | |
1338 | if (rr->length < usb_int_regs_length(count)) { | |
1339 | dev_dbg_f(zd_usb_dev(usb), | |
1340 | "error: actual length %d less than expected %d\n", | |
1341 | rr->length, usb_int_regs_length(count)); | |
1342 | goto error_unlock; | |
1343 | } | |
1344 | if (rr->length > sizeof(rr->buffer)) { | |
1345 | dev_dbg_f(zd_usb_dev(usb), | |
1346 | "error: actual length %d exceeds buffer size %zu\n", | |
1347 | rr->length, sizeof(rr->buffer)); | |
1348 | goto error_unlock; | |
1349 | } | |
1350 | ||
1351 | for (i = 0; i < count; i++) { | |
1352 | struct reg_data *rd = ®s->regs[i]; | |
1353 | if (rd->addr != req->addr[i]) { | |
1354 | dev_dbg_f(zd_usb_dev(usb), | |
1355 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1356 | le16_to_cpu(rd->addr), | |
1357 | le16_to_cpu(req->addr[i])); | |
1358 | goto error_unlock; | |
1359 | } | |
1360 | values[i] = le16_to_cpu(rd->value); | |
1361 | } | |
1362 | ||
1363 | r = 0; | |
1364 | error_unlock: | |
a68077de | 1365 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1366 | return r; |
1367 | } | |
1368 | ||
1369 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1370 | const zd_addr_t *addresses, unsigned int count) | |
1371 | { | |
1372 | int r; | |
1373 | int i, req_len, actual_req_len; | |
1374 | struct usb_device *udev; | |
1375 | struct usb_req_read_regs *req = NULL; | |
1376 | unsigned long timeout; | |
1377 | ||
1378 | if (count < 1) { | |
1379 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1380 | return -EINVAL; | |
1381 | } | |
1382 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1383 | dev_dbg_f(zd_usb_dev(usb), | |
1384 | "error: count %u exceeds possible max %u\n", | |
1385 | count, USB_MAX_IOREAD16_COUNT); | |
1386 | return -EINVAL; | |
1387 | } | |
1388 | if (in_atomic()) { | |
1389 | dev_dbg_f(zd_usb_dev(usb), | |
1390 | "error: io in atomic context not supported\n"); | |
1391 | return -EWOULDBLOCK; | |
1392 | } | |
1393 | if (!usb_int_enabled(usb)) { | |
1394 | dev_dbg_f(zd_usb_dev(usb), | |
1395 | "error: usb interrupt not enabled\n"); | |
1396 | return -EWOULDBLOCK; | |
1397 | } | |
1398 | ||
1399 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); | |
35c3404e | 1400 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1401 | if (!req) |
1402 | return -ENOMEM; | |
1403 | req->id = cpu_to_le16(USB_REQ_READ_REGS); | |
1404 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1405 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 DD |
1406 | |
1407 | udev = zd_usb_to_usbdev(usb); | |
1408 | prepare_read_regs_int(usb); | |
1409 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1410 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1411 | if (r) { | |
1412 | dev_dbg_f(zd_usb_dev(usb), | |
1413 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1414 | goto error; | |
1415 | } | |
1416 | if (req_len != actual_req_len) { | |
1417 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n" | |
1418 | " req_len %d != actual_req_len %d\n", | |
1419 | req_len, actual_req_len); | |
1420 | r = -EIO; | |
1421 | goto error; | |
1422 | } | |
1423 | ||
1424 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
1425 | msecs_to_jiffies(1000)); | |
1426 | if (!timeout) { | |
1427 | disable_read_regs_int(usb); | |
1428 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1429 | r = -ETIMEDOUT; | |
1430 | goto error; | |
1431 | } | |
1432 | ||
1433 | r = get_results(usb, values, req, count); | |
1434 | error: | |
1435 | kfree(req); | |
1436 | return r; | |
1437 | } | |
1438 | ||
1439 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, | |
1440 | unsigned int count) | |
1441 | { | |
1442 | int r; | |
1443 | struct usb_device *udev; | |
1444 | struct usb_req_write_regs *req = NULL; | |
1445 | int i, req_len, actual_req_len; | |
1446 | ||
1447 | if (count == 0) | |
1448 | return 0; | |
1449 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1450 | dev_dbg_f(zd_usb_dev(usb), | |
1451 | "error: count %u exceeds possible max %u\n", | |
1452 | count, USB_MAX_IOWRITE16_COUNT); | |
1453 | return -EINVAL; | |
1454 | } | |
1455 | if (in_atomic()) { | |
1456 | dev_dbg_f(zd_usb_dev(usb), | |
1457 | "error: io in atomic context not supported\n"); | |
1458 | return -EWOULDBLOCK; | |
1459 | } | |
1460 | ||
1461 | req_len = sizeof(struct usb_req_write_regs) + | |
1462 | count * sizeof(struct reg_data); | |
35c3404e | 1463 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1464 | if (!req) |
1465 | return -ENOMEM; | |
1466 | ||
1467 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1468 | for (i = 0; i < count; i++) { | |
1469 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1470 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1471 | rw->value = cpu_to_le16(ioreqs[i].value); |
1472 | } | |
1473 | ||
1474 | udev = zd_usb_to_usbdev(usb); | |
1475 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1476 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1477 | if (r) { | |
1478 | dev_dbg_f(zd_usb_dev(usb), | |
1479 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1480 | goto error; | |
1481 | } | |
1482 | if (req_len != actual_req_len) { | |
1483 | dev_dbg_f(zd_usb_dev(usb), | |
1484 | "error in usb_bulk_msg()" | |
1485 | " req_len %d != actual_req_len %d\n", | |
1486 | req_len, actual_req_len); | |
1487 | r = -EIO; | |
1488 | goto error; | |
1489 | } | |
1490 | ||
1491 | /* FALL-THROUGH with r == 0 */ | |
1492 | error: | |
1493 | kfree(req); | |
1494 | return r; | |
1495 | } | |
1496 | ||
1497 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) | |
1498 | { | |
1499 | int r; | |
1500 | struct usb_device *udev; | |
1501 | struct usb_req_rfwrite *req = NULL; | |
1502 | int i, req_len, actual_req_len; | |
1503 | u16 bit_value_template; | |
1504 | ||
1505 | if (in_atomic()) { | |
1506 | dev_dbg_f(zd_usb_dev(usb), | |
1507 | "error: io in atomic context not supported\n"); | |
1508 | return -EWOULDBLOCK; | |
1509 | } | |
1510 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1511 | dev_dbg_f(zd_usb_dev(usb), | |
1512 | "error: bits %d are smaller than" | |
1513 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1514 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1515 | return -EINVAL; | |
1516 | } | |
1517 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1518 | dev_dbg_f(zd_usb_dev(usb), | |
1519 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
1520 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
1521 | return -EINVAL; | |
1522 | } | |
1523 | #ifdef DEBUG | |
1524 | if (value & (~0UL << bits)) { | |
1525 | dev_dbg_f(zd_usb_dev(usb), | |
1526 | "error: value %#09x has bits >= %d set\n", | |
1527 | value, bits); | |
1528 | return -EINVAL; | |
1529 | } | |
1530 | #endif /* DEBUG */ | |
1531 | ||
1532 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
1533 | ||
1534 | r = zd_usb_ioread16(usb, &bit_value_template, CR203); | |
1535 | if (r) { | |
1536 | dev_dbg_f(zd_usb_dev(usb), | |
1537 | "error %d: Couldn't read CR203\n", r); | |
1538 | goto out; | |
1539 | } | |
1540 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
1541 | ||
1542 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); | |
35c3404e | 1543 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1544 | if (!req) |
1545 | return -ENOMEM; | |
1546 | ||
1547 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
1548 | /* 1: 3683a, but not used in ZYDAS driver */ | |
1549 | req->value = cpu_to_le16(2); | |
1550 | req->bits = cpu_to_le16(bits); | |
1551 | ||
1552 | for (i = 0; i < bits; i++) { | |
1553 | u16 bv = bit_value_template; | |
1554 | if (value & (1 << (bits-1-i))) | |
1555 | bv |= RF_DATA; | |
1556 | req->bit_values[i] = cpu_to_le16(bv); | |
1557 | } | |
1558 | ||
1559 | udev = zd_usb_to_usbdev(usb); | |
1560 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1561 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1562 | if (r) { | |
1563 | dev_dbg_f(zd_usb_dev(usb), | |
1564 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1565 | goto out; | |
1566 | } | |
1567 | if (req_len != actual_req_len) { | |
1568 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()" | |
1569 | " req_len %d != actual_req_len %d\n", | |
1570 | req_len, actual_req_len); | |
1571 | r = -EIO; | |
1572 | goto out; | |
1573 | } | |
1574 | ||
1575 | /* FALL-THROUGH with r == 0 */ | |
1576 | out: | |
1577 | kfree(req); | |
1578 | return r; | |
1579 | } |