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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> | |
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 */ | |
39 | { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 }, | |
14990c69 | 40 | { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 }, |
e85d0918 DD |
41 | { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 }, |
42 | { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, | |
43 | { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 }, | |
aa1d3a18 | 44 | { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 }, |
e85d0918 | 45 | { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 }, |
dd2f5538 | 46 | { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 }, |
1b865491 | 47 | { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, |
12f39308 | 48 | { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 }, |
4ceb7e99 | 49 | { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 }, |
fca2714f | 50 | { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 }, |
fc3e39be | 51 | { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 }, |
f2423723 DD |
52 | { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 }, |
53 | { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 }, | |
54 | { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 }, | |
a362bf57 | 55 | { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 }, |
229782a3 | 56 | { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 }, |
a3fa3aba | 57 | { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 }, |
a9eea9ae | 58 | { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 }, |
ababda03 | 59 | { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 }, |
269fca0e | 60 | { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 }, |
5d89945e | 61 | { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 }, |
e85d0918 DD |
62 | /* ZD1211B */ |
63 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, | |
0feec9df | 64 | { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B }, |
e85d0918 | 65 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, |
dd2f5538 | 66 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
943599ee | 67 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, |
8e87295b | 68 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, |
f72151fb | 69 | { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B }, |
9dfd5500 | 70 | { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B }, |
a2bdcc67 DD |
71 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, |
72 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
33218ba1 | 73 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, |
2e9b2467 | 74 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, |
aec91028 DD |
75 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
76 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
c445a31c | 77 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
5d082fe8 | 78 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, |
187bb417 | 79 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, |
019a6755 | 80 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
93f510bb | 81 | { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
6eb07250 | 82 | { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, |
25343469 | 83 | { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
8e97afe5 | 84 | { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
475fed1e | 85 | { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B }, |
61ef6062 | 86 | { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B }, |
0feec9df | 87 | { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B }, |
de262496 | 88 | { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B }, |
b4b223cd | 89 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B }, |
a1030e92 DD |
90 | /* "Driverless" devices that need ejecting */ |
91 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 92 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
93 | {} |
94 | }; | |
95 | ||
96 | MODULE_LICENSE("GPL"); | |
97 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
98 | MODULE_AUTHOR("Ulrich Kunitz"); | |
99 | MODULE_AUTHOR("Daniel Drake"); | |
100 | MODULE_VERSION("1.0"); | |
101 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
102 | ||
103 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
104 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
105 | ||
e85d0918 | 106 | /* USB device initialization */ |
72e77a8a | 107 | static void int_urb_complete(struct urb *urb); |
e85d0918 DD |
108 | |
109 | static int request_fw_file( | |
110 | const struct firmware **fw, const char *name, struct device *device) | |
111 | { | |
112 | int r; | |
113 | ||
114 | dev_dbg_f(device, "fw name %s\n", name); | |
115 | ||
116 | r = request_firmware(fw, name, device); | |
117 | if (r) | |
118 | dev_err(device, | |
119 | "Could not load firmware file %s. Error number %d\n", | |
120 | name, r); | |
121 | return r; | |
122 | } | |
123 | ||
124 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
125 | { | |
126 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
127 | } | |
128 | ||
129 | enum upload_code_flags { | |
130 | REBOOT = 1, | |
131 | }; | |
132 | ||
133 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
134 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
135 | ||
136 | static int upload_code(struct usb_device *udev, | |
137 | const u8 *data, size_t size, u16 code_offset, int flags) | |
138 | { | |
139 | u8 *p; | |
140 | int r; | |
141 | ||
142 | /* USB request blocks need "kmalloced" buffers. | |
143 | */ | |
144 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
145 | if (!p) { | |
146 | dev_err(&udev->dev, "out of memory\n"); | |
147 | r = -ENOMEM; | |
148 | goto error; | |
149 | } | |
150 | ||
151 | size &= ~1; | |
152 | while (size > 0) { | |
153 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
154 | size : MAX_TRANSFER_SIZE; | |
155 | ||
156 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
157 | ||
158 | memcpy(p, data, transfer_size); | |
159 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
160 | USB_REQ_FIRMWARE_DOWNLOAD, | |
161 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
162 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
163 | if (r < 0) { | |
164 | dev_err(&udev->dev, | |
165 | "USB control request for firmware upload" | |
166 | " failed. Error number %d\n", r); | |
167 | goto error; | |
168 | } | |
169 | transfer_size = r & ~1; | |
170 | ||
171 | size -= transfer_size; | |
172 | data += transfer_size; | |
173 | code_offset += transfer_size/sizeof(u16); | |
174 | } | |
175 | ||
176 | if (flags & REBOOT) { | |
177 | u8 ret; | |
178 | ||
a8c4ea7a | 179 | /* Use "DMA-aware" buffer. */ |
e85d0918 DD |
180 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
181 | USB_REQ_FIRMWARE_CONFIRM, | |
182 | USB_DIR_IN | USB_TYPE_VENDOR, | |
a8c4ea7a | 183 | 0, 0, p, sizeof(ret), 5000 /* ms */); |
e85d0918 DD |
184 | if (r != sizeof(ret)) { |
185 | dev_err(&udev->dev, | |
186 | "control request firmeware confirmation failed." | |
187 | " Return value %d\n", r); | |
188 | if (r >= 0) | |
189 | r = -ENODEV; | |
190 | goto error; | |
191 | } | |
a8c4ea7a | 192 | ret = p[0]; |
e85d0918 DD |
193 | if (ret & 0x80) { |
194 | dev_err(&udev->dev, | |
195 | "Internal error while downloading." | |
196 | " Firmware confirm return value %#04x\n", | |
197 | (unsigned int)ret); | |
198 | r = -ENODEV; | |
199 | goto error; | |
200 | } | |
201 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
202 | (unsigned int)ret); | |
203 | } | |
204 | ||
205 | r = 0; | |
206 | error: | |
207 | kfree(p); | |
208 | return r; | |
209 | } | |
210 | ||
211 | static u16 get_word(const void *data, u16 offset) | |
212 | { | |
213 | const __le16 *p = data; | |
214 | return le16_to_cpu(p[offset]); | |
215 | } | |
216 | ||
74553aed | 217 | static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
e85d0918 DD |
218 | const char* postfix) |
219 | { | |
220 | scnprintf(buffer, size, "%s%s", | |
74553aed | 221 | usb->is_zd1211b ? |
e85d0918 DD |
222 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
223 | postfix); | |
224 | return buffer; | |
225 | } | |
226 | ||
74553aed | 227 | static int handle_version_mismatch(struct zd_usb *usb, |
d066c219 DD |
228 | const struct firmware *ub_fw) |
229 | { | |
74553aed | 230 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
d066c219 DD |
231 | const struct firmware *ur_fw = NULL; |
232 | int offset; | |
233 | int r = 0; | |
234 | char fw_name[128]; | |
235 | ||
236 | r = request_fw_file(&ur_fw, | |
74553aed | 237 | get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
d066c219 DD |
238 | &udev->dev); |
239 | if (r) | |
240 | goto error; | |
241 | ||
ee302767 | 242 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
243 | if (r) |
244 | goto error; | |
245 | ||
ee302767 | 246 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 247 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 248 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
249 | |
250 | /* At this point, the vendor driver downloads the whole firmware | |
251 | * image, hacks around with version IDs, and uploads it again, | |
252 | * completely overwriting the boot code. We do not do this here as | |
253 | * it is not required on any tested devices, and it is suspected to | |
254 | * cause problems. */ | |
255 | error: | |
256 | release_firmware(ur_fw); | |
257 | return r; | |
258 | } | |
259 | ||
74553aed | 260 | static int upload_firmware(struct zd_usb *usb) |
e85d0918 DD |
261 | { |
262 | int r; | |
263 | u16 fw_bcdDevice; | |
264 | u16 bcdDevice; | |
74553aed | 265 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
266 | const struct firmware *ub_fw = NULL; |
267 | const struct firmware *uph_fw = NULL; | |
268 | char fw_name[128]; | |
269 | ||
270 | bcdDevice = get_bcdDevice(udev); | |
271 | ||
272 | r = request_fw_file(&ub_fw, | |
74553aed | 273 | get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
e85d0918 DD |
274 | &udev->dev); |
275 | if (r) | |
276 | goto error; | |
277 | ||
ee302767 | 278 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 279 | |
e85d0918 DD |
280 | if (fw_bcdDevice != bcdDevice) { |
281 | dev_info(&udev->dev, | |
d066c219 DD |
282 | "firmware version %#06x and device bootcode version " |
283 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
284 | if (bcdDevice <= 0x4313) | |
285 | dev_warn(&udev->dev, "device has old bootcode, please " | |
286 | "report success or failure\n"); | |
287 | ||
74553aed | 288 | r = handle_version_mismatch(usb, ub_fw); |
d066c219 DD |
289 | if (r) |
290 | goto error; | |
e85d0918 DD |
291 | } else { |
292 | dev_dbg_f(&udev->dev, | |
293 | "firmware device id %#06x is equal to the " | |
294 | "actual device id\n", fw_bcdDevice); | |
295 | } | |
296 | ||
297 | ||
298 | r = request_fw_file(&uph_fw, | |
74553aed | 299 | get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
e85d0918 DD |
300 | &udev->dev); |
301 | if (r) | |
302 | goto error; | |
303 | ||
ee302767 | 304 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
305 | if (r) { |
306 | dev_err(&udev->dev, | |
307 | "Could not upload firmware code uph. Error number %d\n", | |
308 | r); | |
309 | } | |
310 | ||
311 | /* FALL-THROUGH */ | |
312 | error: | |
313 | release_firmware(ub_fw); | |
314 | release_firmware(uph_fw); | |
315 | return r; | |
316 | } | |
317 | ||
74553aed DD |
318 | /* Read data from device address space using "firmware interface" which does |
319 | * not require firmware to be loaded. */ | |
320 | int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) | |
321 | { | |
322 | int r; | |
323 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
a8c4ea7a | 324 | u8 *buf; |
74553aed | 325 | |
a8c4ea7a AN |
326 | /* Use "DMA-aware" buffer. */ |
327 | buf = kmalloc(len, GFP_KERNEL); | |
328 | if (!buf) | |
329 | return -ENOMEM; | |
74553aed DD |
330 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
331 | USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, | |
a8c4ea7a | 332 | buf, len, 5000); |
74553aed DD |
333 | if (r < 0) { |
334 | dev_err(&udev->dev, | |
335 | "read over firmware interface failed: %d\n", r); | |
a8c4ea7a | 336 | goto exit; |
74553aed DD |
337 | } else if (r != len) { |
338 | dev_err(&udev->dev, | |
339 | "incomplete read over firmware interface: %d/%d\n", | |
340 | r, len); | |
a8c4ea7a AN |
341 | r = -EIO; |
342 | goto exit; | |
74553aed | 343 | } |
a8c4ea7a AN |
344 | r = 0; |
345 | memcpy(data, buf, len); | |
346 | exit: | |
347 | kfree(buf); | |
348 | return r; | |
74553aed DD |
349 | } |
350 | ||
e85d0918 DD |
351 | #define urb_dev(urb) (&(urb)->dev->dev) |
352 | ||
353 | static inline void handle_regs_int(struct urb *urb) | |
354 | { | |
355 | struct zd_usb *usb = urb->context; | |
356 | struct zd_usb_interrupt *intr = &usb->intr; | |
357 | int len; | |
72e77a8a | 358 | u16 int_num; |
e85d0918 DD |
359 | |
360 | ZD_ASSERT(in_interrupt()); | |
361 | spin_lock(&intr->lock); | |
362 | ||
d63ddcec | 363 | int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); |
72e77a8a LCC |
364 | if (int_num == CR_INTERRUPT) { |
365 | struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); | |
366 | memcpy(&mac->intr_buffer, urb->transfer_buffer, | |
367 | USB_MAX_EP_INT_BUFFER); | |
368 | schedule_work(&mac->process_intr); | |
369 | } else if (intr->read_regs_enabled) { | |
e85d0918 DD |
370 | intr->read_regs.length = len = urb->actual_length; |
371 | ||
372 | if (len > sizeof(intr->read_regs.buffer)) | |
373 | len = sizeof(intr->read_regs.buffer); | |
374 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); | |
375 | intr->read_regs_enabled = 0; | |
376 | complete(&intr->read_regs.completion); | |
377 | goto out; | |
378 | } | |
379 | ||
e85d0918 DD |
380 | out: |
381 | spin_unlock(&intr->lock); | |
382 | } | |
383 | ||
7d12e780 | 384 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
385 | { |
386 | int r; | |
387 | struct usb_int_header *hdr; | |
388 | ||
389 | switch (urb->status) { | |
390 | case 0: | |
391 | break; | |
392 | case -ESHUTDOWN: | |
393 | case -EINVAL: | |
394 | case -ENODEV: | |
395 | case -ENOENT: | |
396 | case -ECONNRESET: | |
e85d0918 | 397 | case -EPIPE: |
b312d799 | 398 | goto kfree; |
e85d0918 DD |
399 | default: |
400 | goto resubmit; | |
401 | } | |
402 | ||
403 | if (urb->actual_length < sizeof(hdr)) { | |
404 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
405 | goto resubmit; | |
406 | } | |
407 | ||
408 | hdr = urb->transfer_buffer; | |
409 | if (hdr->type != USB_INT_TYPE) { | |
410 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
411 | goto resubmit; | |
412 | } | |
413 | ||
414 | switch (hdr->id) { | |
415 | case USB_INT_ID_REGS: | |
416 | handle_regs_int(urb); | |
417 | break; | |
418 | case USB_INT_ID_RETRY_FAILED: | |
459c51ad | 419 | zd_mac_tx_failed(zd_usb_to_hw(urb->context)); |
e85d0918 DD |
420 | break; |
421 | default: | |
422 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
423 | (unsigned int)hdr->id); | |
424 | goto resubmit; | |
425 | } | |
426 | ||
427 | resubmit: | |
428 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
429 | if (r) { | |
430 | dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb); | |
431 | goto kfree; | |
432 | } | |
433 | return; | |
434 | kfree: | |
435 | kfree(urb->transfer_buffer); | |
436 | } | |
437 | ||
438 | static inline int int_urb_interval(struct usb_device *udev) | |
439 | { | |
440 | switch (udev->speed) { | |
441 | case USB_SPEED_HIGH: | |
442 | return 4; | |
443 | case USB_SPEED_LOW: | |
444 | return 10; | |
445 | case USB_SPEED_FULL: | |
446 | default: | |
447 | return 1; | |
448 | } | |
449 | } | |
450 | ||
451 | static inline int usb_int_enabled(struct zd_usb *usb) | |
452 | { | |
453 | unsigned long flags; | |
454 | struct zd_usb_interrupt *intr = &usb->intr; | |
455 | struct urb *urb; | |
456 | ||
457 | spin_lock_irqsave(&intr->lock, flags); | |
458 | urb = intr->urb; | |
459 | spin_unlock_irqrestore(&intr->lock, flags); | |
460 | return urb != NULL; | |
461 | } | |
462 | ||
463 | int zd_usb_enable_int(struct zd_usb *usb) | |
464 | { | |
465 | int r; | |
466 | struct usb_device *udev; | |
467 | struct zd_usb_interrupt *intr = &usb->intr; | |
468 | void *transfer_buffer = NULL; | |
469 | struct urb *urb; | |
470 | ||
471 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
472 | ||
35c3404e | 473 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
474 | if (!urb) { |
475 | r = -ENOMEM; | |
476 | goto out; | |
477 | } | |
478 | ||
479 | ZD_ASSERT(!irqs_disabled()); | |
480 | spin_lock_irq(&intr->lock); | |
481 | if (intr->urb) { | |
482 | spin_unlock_irq(&intr->lock); | |
483 | r = 0; | |
484 | goto error_free_urb; | |
485 | } | |
486 | intr->urb = urb; | |
487 | spin_unlock_irq(&intr->lock); | |
488 | ||
489 | /* TODO: make it a DMA buffer */ | |
490 | r = -ENOMEM; | |
35c3404e | 491 | transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL); |
e85d0918 DD |
492 | if (!transfer_buffer) { |
493 | dev_dbg_f(zd_usb_dev(usb), | |
494 | "couldn't allocate transfer_buffer\n"); | |
495 | goto error_set_urb_null; | |
496 | } | |
497 | ||
498 | udev = zd_usb_to_usbdev(usb); | |
499 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), | |
500 | transfer_buffer, USB_MAX_EP_INT_BUFFER, | |
501 | int_urb_complete, usb, | |
502 | intr->interval); | |
503 | ||
504 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 505 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
506 | if (r) { |
507 | dev_dbg_f(zd_usb_dev(usb), | |
508 | "Couldn't submit urb. Error number %d\n", r); | |
509 | goto error; | |
510 | } | |
511 | ||
512 | return 0; | |
513 | error: | |
514 | kfree(transfer_buffer); | |
515 | error_set_urb_null: | |
516 | spin_lock_irq(&intr->lock); | |
517 | intr->urb = NULL; | |
518 | spin_unlock_irq(&intr->lock); | |
519 | error_free_urb: | |
520 | usb_free_urb(urb); | |
521 | out: | |
522 | return r; | |
523 | } | |
524 | ||
525 | void zd_usb_disable_int(struct zd_usb *usb) | |
526 | { | |
527 | unsigned long flags; | |
528 | struct zd_usb_interrupt *intr = &usb->intr; | |
529 | struct urb *urb; | |
530 | ||
531 | spin_lock_irqsave(&intr->lock, flags); | |
532 | urb = intr->urb; | |
533 | if (!urb) { | |
534 | spin_unlock_irqrestore(&intr->lock, flags); | |
535 | return; | |
536 | } | |
537 | intr->urb = NULL; | |
538 | spin_unlock_irqrestore(&intr->lock, flags); | |
539 | ||
540 | usb_kill_urb(urb); | |
541 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
542 | usb_free_urb(urb); | |
543 | } | |
544 | ||
545 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
546 | unsigned int length) | |
547 | { | |
548 | int i; | |
e85d0918 DD |
549 | const struct rx_length_info *length_info; |
550 | ||
551 | if (length < sizeof(struct rx_length_info)) { | |
552 | /* It's not a complete packet anyhow. */ | |
553 | return; | |
554 | } | |
555 | length_info = (struct rx_length_info *) | |
556 | (buffer + length - sizeof(struct rx_length_info)); | |
557 | ||
558 | /* It might be that three frames are merged into a single URB | |
559 | * transaction. We have to check for the length info tag. | |
560 | * | |
561 | * While testing we discovered that length_info might be unaligned, | |
562 | * because if USB transactions are merged, the last packet will not | |
563 | * be padded. Unaligned access might also happen if the length_info | |
564 | * structure is not present. | |
565 | */ | |
533dd1b0 | 566 | if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG) |
b269825b | 567 | { |
e85d0918 DD |
568 | unsigned int l, k, n; |
569 | for (i = 0, l = 0;; i++) { | |
533dd1b0 | 570 | k = get_unaligned_le16(&length_info->length[i]); |
850c211c UK |
571 | if (k == 0) |
572 | return; | |
e85d0918 DD |
573 | n = l+k; |
574 | if (n > length) | |
575 | return; | |
459c51ad | 576 | zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k); |
e85d0918 DD |
577 | if (i >= 2) |
578 | return; | |
579 | l = (n+3) & ~3; | |
580 | } | |
581 | } else { | |
459c51ad | 582 | zd_mac_rx(zd_usb_to_hw(usb), buffer, length); |
e85d0918 DD |
583 | } |
584 | } | |
585 | ||
7d12e780 | 586 | static void rx_urb_complete(struct urb *urb) |
e85d0918 DD |
587 | { |
588 | struct zd_usb *usb; | |
589 | struct zd_usb_rx *rx; | |
590 | const u8 *buffer; | |
591 | unsigned int length; | |
592 | ||
593 | switch (urb->status) { | |
594 | case 0: | |
595 | break; | |
596 | case -ESHUTDOWN: | |
597 | case -EINVAL: | |
598 | case -ENODEV: | |
599 | case -ENOENT: | |
600 | case -ECONNRESET: | |
e85d0918 | 601 | case -EPIPE: |
b312d799 | 602 | return; |
e85d0918 DD |
603 | default: |
604 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
605 | goto resubmit; | |
606 | } | |
607 | ||
608 | buffer = urb->transfer_buffer; | |
609 | length = urb->actual_length; | |
610 | usb = urb->context; | |
611 | rx = &usb->rx; | |
612 | ||
613 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { | |
614 | /* If there is an old first fragment, we don't care. */ | |
615 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
616 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
617 | spin_lock(&rx->lock); | |
618 | memcpy(rx->fragment, buffer, length); | |
619 | rx->fragment_length = length; | |
620 | spin_unlock(&rx->lock); | |
621 | goto resubmit; | |
622 | } | |
623 | ||
624 | spin_lock(&rx->lock); | |
625 | if (rx->fragment_length > 0) { | |
626 | /* We are on a second fragment, we believe */ | |
627 | ZD_ASSERT(length + rx->fragment_length <= | |
628 | ARRAY_SIZE(rx->fragment)); | |
629 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
630 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
631 | handle_rx_packet(usb, rx->fragment, | |
632 | rx->fragment_length + length); | |
633 | rx->fragment_length = 0; | |
634 | spin_unlock(&rx->lock); | |
635 | } else { | |
636 | spin_unlock(&rx->lock); | |
637 | handle_rx_packet(usb, buffer, length); | |
638 | } | |
639 | ||
640 | resubmit: | |
641 | usb_submit_urb(urb, GFP_ATOMIC); | |
642 | } | |
643 | ||
459c51ad | 644 | static struct urb *alloc_rx_urb(struct zd_usb *usb) |
e85d0918 DD |
645 | { |
646 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
647 | struct urb *urb; | |
648 | void *buffer; | |
649 | ||
35c3404e | 650 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
651 | if (!urb) |
652 | return NULL; | |
35c3404e | 653 | buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
e85d0918 DD |
654 | &urb->transfer_dma); |
655 | if (!buffer) { | |
656 | usb_free_urb(urb); | |
657 | return NULL; | |
658 | } | |
659 | ||
660 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
661 | buffer, USB_MAX_RX_SIZE, | |
662 | rx_urb_complete, usb); | |
663 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
664 | ||
665 | return urb; | |
666 | } | |
667 | ||
459c51ad | 668 | static void free_rx_urb(struct urb *urb) |
e85d0918 DD |
669 | { |
670 | if (!urb) | |
671 | return; | |
672 | usb_buffer_free(urb->dev, urb->transfer_buffer_length, | |
673 | urb->transfer_buffer, urb->transfer_dma); | |
674 | usb_free_urb(urb); | |
675 | } | |
676 | ||
677 | int zd_usb_enable_rx(struct zd_usb *usb) | |
678 | { | |
679 | int i, r; | |
680 | struct zd_usb_rx *rx = &usb->rx; | |
681 | struct urb **urbs; | |
682 | ||
683 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
684 | ||
685 | r = -ENOMEM; | |
459c51ad | 686 | urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
687 | if (!urbs) |
688 | goto error; | |
459c51ad DD |
689 | for (i = 0; i < RX_URBS_COUNT; i++) { |
690 | urbs[i] = alloc_rx_urb(usb); | |
e85d0918 DD |
691 | if (!urbs[i]) |
692 | goto error; | |
693 | } | |
694 | ||
695 | ZD_ASSERT(!irqs_disabled()); | |
696 | spin_lock_irq(&rx->lock); | |
697 | if (rx->urbs) { | |
698 | spin_unlock_irq(&rx->lock); | |
699 | r = 0; | |
700 | goto error; | |
701 | } | |
702 | rx->urbs = urbs; | |
459c51ad | 703 | rx->urbs_count = RX_URBS_COUNT; |
e85d0918 DD |
704 | spin_unlock_irq(&rx->lock); |
705 | ||
459c51ad | 706 | for (i = 0; i < RX_URBS_COUNT; i++) { |
35c3404e | 707 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
708 | if (r) |
709 | goto error_submit; | |
710 | } | |
711 | ||
712 | return 0; | |
713 | error_submit: | |
459c51ad | 714 | for (i = 0; i < RX_URBS_COUNT; i++) { |
e85d0918 DD |
715 | usb_kill_urb(urbs[i]); |
716 | } | |
717 | spin_lock_irq(&rx->lock); | |
718 | rx->urbs = NULL; | |
719 | rx->urbs_count = 0; | |
720 | spin_unlock_irq(&rx->lock); | |
721 | error: | |
722 | if (urbs) { | |
459c51ad DD |
723 | for (i = 0; i < RX_URBS_COUNT; i++) |
724 | free_rx_urb(urbs[i]); | |
e85d0918 DD |
725 | } |
726 | return r; | |
727 | } | |
728 | ||
729 | void zd_usb_disable_rx(struct zd_usb *usb) | |
730 | { | |
731 | int i; | |
732 | unsigned long flags; | |
733 | struct urb **urbs; | |
734 | unsigned int count; | |
735 | struct zd_usb_rx *rx = &usb->rx; | |
736 | ||
737 | spin_lock_irqsave(&rx->lock, flags); | |
738 | urbs = rx->urbs; | |
739 | count = rx->urbs_count; | |
740 | spin_unlock_irqrestore(&rx->lock, flags); | |
741 | if (!urbs) | |
742 | return; | |
743 | ||
744 | for (i = 0; i < count; i++) { | |
745 | usb_kill_urb(urbs[i]); | |
459c51ad | 746 | free_rx_urb(urbs[i]); |
e85d0918 DD |
747 | } |
748 | kfree(urbs); | |
749 | ||
750 | spin_lock_irqsave(&rx->lock, flags); | |
751 | rx->urbs = NULL; | |
752 | rx->urbs_count = 0; | |
753 | spin_unlock_irqrestore(&rx->lock, flags); | |
754 | } | |
755 | ||
459c51ad DD |
756 | /** |
757 | * zd_usb_disable_tx - disable transmission | |
758 | * @usb: the zd1211rw-private USB structure | |
759 | * | |
760 | * Frees all URBs in the free list and marks the transmission as disabled. | |
761 | */ | |
762 | void zd_usb_disable_tx(struct zd_usb *usb) | |
763 | { | |
764 | struct zd_usb_tx *tx = &usb->tx; | |
765 | unsigned long flags; | |
766 | struct list_head *pos, *n; | |
767 | ||
768 | spin_lock_irqsave(&tx->lock, flags); | |
769 | list_for_each_safe(pos, n, &tx->free_urb_list) { | |
770 | list_del(pos); | |
771 | usb_free_urb(list_entry(pos, struct urb, urb_list)); | |
772 | } | |
773 | tx->enabled = 0; | |
774 | tx->submitted_urbs = 0; | |
775 | /* The stopped state is ignored, relying on ieee80211_wake_queues() | |
776 | * in a potentionally following zd_usb_enable_tx(). | |
777 | */ | |
778 | spin_unlock_irqrestore(&tx->lock, flags); | |
779 | } | |
780 | ||
781 | /** | |
782 | * zd_usb_enable_tx - enables transmission | |
783 | * @usb: a &struct zd_usb pointer | |
784 | * | |
785 | * This function enables transmission and prepares the &zd_usb_tx data | |
786 | * structure. | |
787 | */ | |
788 | void zd_usb_enable_tx(struct zd_usb *usb) | |
789 | { | |
790 | unsigned long flags; | |
791 | struct zd_usb_tx *tx = &usb->tx; | |
792 | ||
793 | spin_lock_irqsave(&tx->lock, flags); | |
794 | tx->enabled = 1; | |
795 | tx->submitted_urbs = 0; | |
796 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
797 | tx->stopped = 0; | |
798 | spin_unlock_irqrestore(&tx->lock, flags); | |
799 | } | |
800 | ||
801 | /** | |
802 | * alloc_tx_urb - provides an tx URB | |
803 | * @usb: a &struct zd_usb pointer | |
804 | * | |
805 | * Allocates a new URB. If possible takes the urb from the free list in | |
806 | * usb->tx. | |
807 | */ | |
808 | static struct urb *alloc_tx_urb(struct zd_usb *usb) | |
809 | { | |
810 | struct zd_usb_tx *tx = &usb->tx; | |
811 | unsigned long flags; | |
812 | struct list_head *entry; | |
813 | struct urb *urb; | |
814 | ||
815 | spin_lock_irqsave(&tx->lock, flags); | |
816 | if (list_empty(&tx->free_urb_list)) { | |
817 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
818 | goto out; | |
819 | } | |
820 | entry = tx->free_urb_list.next; | |
821 | list_del(entry); | |
822 | urb = list_entry(entry, struct urb, urb_list); | |
823 | out: | |
824 | spin_unlock_irqrestore(&tx->lock, flags); | |
825 | return urb; | |
826 | } | |
827 | ||
828 | /** | |
829 | * free_tx_urb - frees a used tx URB | |
830 | * @usb: a &struct zd_usb pointer | |
831 | * @urb: URB to be freed | |
832 | * | |
833 | * Frees the the transmission URB, which means to put it on the free URB | |
834 | * list. | |
835 | */ | |
836 | static void free_tx_urb(struct zd_usb *usb, struct urb *urb) | |
837 | { | |
838 | struct zd_usb_tx *tx = &usb->tx; | |
839 | unsigned long flags; | |
840 | ||
841 | spin_lock_irqsave(&tx->lock, flags); | |
842 | if (!tx->enabled) { | |
843 | usb_free_urb(urb); | |
844 | goto out; | |
845 | } | |
846 | list_add(&urb->urb_list, &tx->free_urb_list); | |
847 | out: | |
848 | spin_unlock_irqrestore(&tx->lock, flags); | |
849 | } | |
850 | ||
851 | static void tx_dec_submitted_urbs(struct zd_usb *usb) | |
852 | { | |
853 | struct zd_usb_tx *tx = &usb->tx; | |
854 | unsigned long flags; | |
855 | ||
856 | spin_lock_irqsave(&tx->lock, flags); | |
857 | --tx->submitted_urbs; | |
858 | if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) { | |
859 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
860 | tx->stopped = 0; | |
861 | } | |
862 | spin_unlock_irqrestore(&tx->lock, flags); | |
863 | } | |
864 | ||
865 | static void tx_inc_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_HIGH) { | |
873 | ieee80211_stop_queues(zd_usb_to_hw(usb)); | |
874 | tx->stopped = 1; | |
875 | } | |
876 | spin_unlock_irqrestore(&tx->lock, flags); | |
877 | } | |
878 | ||
879 | /** | |
880 | * tx_urb_complete - completes the execution of an URB | |
881 | * @urb: a URB | |
882 | * | |
883 | * This function is called if the URB has been transferred to a device or an | |
884 | * error has happened. | |
885 | */ | |
7d12e780 | 886 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
887 | { |
888 | int r; | |
459c51ad | 889 | struct sk_buff *skb; |
e039fa4a | 890 | struct ieee80211_tx_info *info; |
459c51ad | 891 | struct zd_usb *usb; |
e85d0918 DD |
892 | |
893 | switch (urb->status) { | |
894 | case 0: | |
895 | break; | |
896 | case -ESHUTDOWN: | |
897 | case -EINVAL: | |
898 | case -ENODEV: | |
899 | case -ENOENT: | |
900 | case -ECONNRESET: | |
b312d799 | 901 | case -EPIPE: |
e85d0918 DD |
902 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
903 | break; | |
e85d0918 DD |
904 | default: |
905 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
906 | goto resubmit; | |
907 | } | |
908 | free_urb: | |
459c51ad | 909 | skb = (struct sk_buff *)urb->context; |
dbabad0c JB |
910 | /* |
911 | * grab 'usb' pointer before handing off the skb (since | |
912 | * it might be freed by zd_mac_tx_to_dev or mac80211) | |
913 | */ | |
e039fa4a | 914 | info = IEEE80211_SKB_CB(skb); |
e6a9854b | 915 | usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb; |
dbabad0c | 916 | zd_mac_tx_to_dev(skb, urb->status); |
459c51ad DD |
917 | free_tx_urb(usb, urb); |
918 | tx_dec_submitted_urbs(usb); | |
e85d0918 DD |
919 | return; |
920 | resubmit: | |
921 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
922 | if (r) { | |
923 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); | |
924 | goto free_urb; | |
925 | } | |
926 | } | |
927 | ||
459c51ad DD |
928 | /** |
929 | * zd_usb_tx: initiates transfer of a frame of the device | |
930 | * | |
931 | * @usb: the zd1211rw-private USB structure | |
932 | * @skb: a &struct sk_buff pointer | |
933 | * | |
934 | * This function tranmits a frame to the device. It doesn't wait for | |
935 | * completion. The frame must contain the control set and have all the | |
936 | * control set information available. | |
937 | * | |
938 | * The function returns 0 if the transfer has been successfully initiated. | |
e85d0918 | 939 | */ |
459c51ad | 940 | int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb) |
e85d0918 DD |
941 | { |
942 | int r; | |
943 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
944 | struct urb *urb; | |
e85d0918 | 945 | |
459c51ad | 946 | urb = alloc_tx_urb(usb); |
e85d0918 DD |
947 | if (!urb) { |
948 | r = -ENOMEM; | |
949 | goto out; | |
950 | } | |
951 | ||
e85d0918 | 952 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
459c51ad | 953 | skb->data, skb->len, tx_urb_complete, skb); |
e85d0918 DD |
954 | |
955 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
956 | if (r) | |
957 | goto error; | |
459c51ad | 958 | tx_inc_submitted_urbs(usb); |
e85d0918 DD |
959 | return 0; |
960 | error: | |
459c51ad | 961 | free_tx_urb(usb, urb); |
e85d0918 DD |
962 | out: |
963 | return r; | |
964 | } | |
965 | ||
966 | static inline void init_usb_interrupt(struct zd_usb *usb) | |
967 | { | |
968 | struct zd_usb_interrupt *intr = &usb->intr; | |
969 | ||
970 | spin_lock_init(&intr->lock); | |
971 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
972 | init_completion(&intr->read_regs.completion); | |
0ce34bc8 | 973 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
974 | } |
975 | ||
976 | static inline void init_usb_rx(struct zd_usb *usb) | |
977 | { | |
978 | struct zd_usb_rx *rx = &usb->rx; | |
979 | spin_lock_init(&rx->lock); | |
980 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { | |
981 | rx->usb_packet_size = 512; | |
982 | } else { | |
983 | rx->usb_packet_size = 64; | |
984 | } | |
985 | ZD_ASSERT(rx->fragment_length == 0); | |
986 | } | |
987 | ||
988 | static inline void init_usb_tx(struct zd_usb *usb) | |
989 | { | |
459c51ad DD |
990 | struct zd_usb_tx *tx = &usb->tx; |
991 | spin_lock_init(&tx->lock); | |
992 | tx->enabled = 0; | |
993 | tx->stopped = 0; | |
994 | INIT_LIST_HEAD(&tx->free_urb_list); | |
995 | tx->submitted_urbs = 0; | |
e85d0918 DD |
996 | } |
997 | ||
459c51ad | 998 | void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw, |
e85d0918 DD |
999 | struct usb_interface *intf) |
1000 | { | |
1001 | memset(usb, 0, sizeof(*usb)); | |
1002 | usb->intf = usb_get_intf(intf); | |
459c51ad | 1003 | usb_set_intfdata(usb->intf, hw); |
e85d0918 DD |
1004 | init_usb_interrupt(usb); |
1005 | init_usb_tx(usb); | |
1006 | init_usb_rx(usb); | |
1007 | } | |
1008 | ||
e85d0918 DD |
1009 | void zd_usb_clear(struct zd_usb *usb) |
1010 | { | |
1011 | usb_set_intfdata(usb->intf, NULL); | |
1012 | usb_put_intf(usb->intf); | |
c48cf125 | 1013 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
1014 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
1015 | } | |
1016 | ||
1017 | static const char *speed(enum usb_device_speed speed) | |
1018 | { | |
1019 | switch (speed) { | |
1020 | case USB_SPEED_LOW: | |
1021 | return "low"; | |
1022 | case USB_SPEED_FULL: | |
1023 | return "full"; | |
1024 | case USB_SPEED_HIGH: | |
1025 | return "high"; | |
1026 | default: | |
1027 | return "unknown speed"; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
1032 | { | |
1033 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
1034 | le16_to_cpu(udev->descriptor.idVendor), | |
1035 | le16_to_cpu(udev->descriptor.idProduct), | |
1036 | get_bcdDevice(udev), | |
1037 | speed(udev->speed)); | |
1038 | } | |
1039 | ||
1040 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
1041 | { | |
1042 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
1043 | return scnprint_id(udev, buffer, size); | |
1044 | } | |
1045 | ||
1046 | #ifdef DEBUG | |
1047 | static void print_id(struct usb_device *udev) | |
1048 | { | |
1049 | char buffer[40]; | |
1050 | ||
1051 | scnprint_id(udev, buffer, sizeof(buffer)); | |
1052 | buffer[sizeof(buffer)-1] = 0; | |
1053 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
1054 | } | |
1055 | #else | |
1056 | #define print_id(udev) do { } while (0) | |
1057 | #endif | |
1058 | ||
a1030e92 DD |
1059 | static int eject_installer(struct usb_interface *intf) |
1060 | { | |
1061 | struct usb_device *udev = interface_to_usbdev(intf); | |
1062 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
1063 | struct usb_endpoint_descriptor *endpoint; | |
1064 | unsigned char *cmd; | |
1065 | u8 bulk_out_ep; | |
1066 | int r; | |
1067 | ||
1068 | /* Find bulk out endpoint */ | |
1069 | endpoint = &iface_desc->endpoint[1].desc; | |
1070 | if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT && | |
f201a8a4 | 1071 | usb_endpoint_xfer_bulk(endpoint)) { |
a1030e92 DD |
1072 | bulk_out_ep = endpoint->bEndpointAddress; |
1073 | } else { | |
1074 | dev_err(&udev->dev, | |
1075 | "zd1211rw: Could not find bulk out endpoint\n"); | |
1076 | return -ENODEV; | |
1077 | } | |
1078 | ||
1079 | cmd = kzalloc(31, GFP_KERNEL); | |
1080 | if (cmd == NULL) | |
1081 | return -ENODEV; | |
1082 | ||
1083 | /* USB bulk command block */ | |
1084 | cmd[0] = 0x55; /* bulk command signature */ | |
1085 | cmd[1] = 0x53; /* bulk command signature */ | |
1086 | cmd[2] = 0x42; /* bulk command signature */ | |
1087 | cmd[3] = 0x43; /* bulk command signature */ | |
1088 | cmd[14] = 6; /* command length */ | |
1089 | ||
1090 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
1091 | cmd[19] = 0x2; /* eject disc */ | |
1092 | ||
1093 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
1094 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
1095 | cmd, 31, NULL, 2000); | |
1096 | kfree(cmd); | |
1097 | if (r) | |
1098 | return r; | |
1099 | ||
1100 | /* At this point, the device disconnects and reconnects with the real | |
1101 | * ID numbers. */ | |
1102 | ||
1103 | usb_set_intfdata(intf, NULL); | |
1104 | return 0; | |
1105 | } | |
1106 | ||
74553aed DD |
1107 | int zd_usb_init_hw(struct zd_usb *usb) |
1108 | { | |
1109 | int r; | |
1110 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1111 | ||
1112 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1113 | ||
1114 | r = upload_firmware(usb); | |
1115 | if (r) { | |
1116 | dev_err(zd_usb_dev(usb), | |
1117 | "couldn't load firmware. Error number %d\n", r); | |
1118 | return r; | |
1119 | } | |
1120 | ||
1121 | r = usb_reset_configuration(zd_usb_to_usbdev(usb)); | |
1122 | if (r) { | |
1123 | dev_dbg_f(zd_usb_dev(usb), | |
1124 | "couldn't reset configuration. Error number %d\n", r); | |
1125 | return r; | |
1126 | } | |
1127 | ||
459c51ad | 1128 | r = zd_mac_init_hw(mac->hw); |
74553aed DD |
1129 | if (r) { |
1130 | dev_dbg_f(zd_usb_dev(usb), | |
1131 | "couldn't initialize mac. Error number %d\n", r); | |
1132 | return r; | |
1133 | } | |
1134 | ||
1135 | usb->initialized = 1; | |
1136 | return 0; | |
1137 | } | |
1138 | ||
e85d0918 DD |
1139 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
1140 | { | |
1141 | int r; | |
1142 | struct usb_device *udev = interface_to_usbdev(intf); | |
459c51ad DD |
1143 | struct zd_usb *usb; |
1144 | struct ieee80211_hw *hw = NULL; | |
e85d0918 DD |
1145 | |
1146 | print_id(udev); | |
1147 | ||
a1030e92 DD |
1148 | if (id->driver_info & DEVICE_INSTALLER) |
1149 | return eject_installer(intf); | |
1150 | ||
e85d0918 DD |
1151 | switch (udev->speed) { |
1152 | case USB_SPEED_LOW: | |
1153 | case USB_SPEED_FULL: | |
1154 | case USB_SPEED_HIGH: | |
1155 | break; | |
1156 | default: | |
1157 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
1158 | r = -ENODEV; | |
1159 | goto error; | |
1160 | } | |
1161 | ||
459c51ad DD |
1162 | r = usb_reset_device(udev); |
1163 | if (r) { | |
1164 | dev_err(&intf->dev, | |
1165 | "couldn't reset usb device. Error number %d\n", r); | |
1166 | goto error; | |
1167 | } | |
6e3632f6 | 1168 | |
459c51ad DD |
1169 | hw = zd_mac_alloc_hw(intf); |
1170 | if (hw == NULL) { | |
e85d0918 DD |
1171 | r = -ENOMEM; |
1172 | goto error; | |
1173 | } | |
1174 | ||
459c51ad | 1175 | usb = &zd_hw_mac(hw)->chip.usb; |
74553aed | 1176 | usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
e85d0918 | 1177 | |
459c51ad | 1178 | r = zd_mac_preinit_hw(hw); |
e85d0918 DD |
1179 | if (r) { |
1180 | dev_dbg_f(&intf->dev, | |
1181 | "couldn't initialize mac. Error number %d\n", r); | |
1182 | goto error; | |
1183 | } | |
1184 | ||
459c51ad | 1185 | r = ieee80211_register_hw(hw); |
e85d0918 DD |
1186 | if (r) { |
1187 | dev_dbg_f(&intf->dev, | |
459c51ad | 1188 | "couldn't register device. Error number %d\n", r); |
e85d0918 DD |
1189 | goto error; |
1190 | } | |
1191 | ||
1192 | dev_dbg_f(&intf->dev, "successful\n"); | |
459c51ad | 1193 | dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy)); |
e85d0918 DD |
1194 | return 0; |
1195 | error: | |
1196 | usb_reset_device(interface_to_usbdev(intf)); | |
459c51ad DD |
1197 | if (hw) { |
1198 | zd_mac_clear(zd_hw_mac(hw)); | |
1199 | ieee80211_free_hw(hw); | |
1200 | } | |
e85d0918 DD |
1201 | return r; |
1202 | } | |
1203 | ||
1204 | static void disconnect(struct usb_interface *intf) | |
1205 | { | |
459c51ad | 1206 | struct ieee80211_hw *hw = zd_intf_to_hw(intf); |
e0579d57 MP |
1207 | struct zd_mac *mac; |
1208 | struct zd_usb *usb; | |
e85d0918 | 1209 | |
a1030e92 DD |
1210 | /* Either something really bad happened, or we're just dealing with |
1211 | * a DEVICE_INSTALLER. */ | |
459c51ad | 1212 | if (hw == NULL) |
a1030e92 DD |
1213 | return; |
1214 | ||
459c51ad | 1215 | mac = zd_hw_mac(hw); |
e0579d57 MP |
1216 | usb = &mac->chip.usb; |
1217 | ||
e85d0918 DD |
1218 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1219 | ||
459c51ad | 1220 | ieee80211_unregister_hw(hw); |
e85d0918 DD |
1221 | |
1222 | /* Just in case something has gone wrong! */ | |
1223 | zd_usb_disable_rx(usb); | |
1224 | zd_usb_disable_int(usb); | |
1225 | ||
1226 | /* If the disconnect has been caused by a removal of the | |
1227 | * driver module, the reset allows reloading of the driver. If the | |
1228 | * reset will not be executed here, the upload of the firmware in the | |
1229 | * probe function caused by the reloading of the driver will fail. | |
1230 | */ | |
1231 | usb_reset_device(interface_to_usbdev(intf)); | |
1232 | ||
459c51ad DD |
1233 | zd_mac_clear(mac); |
1234 | ieee80211_free_hw(hw); | |
e85d0918 DD |
1235 | dev_dbg(&intf->dev, "disconnected\n"); |
1236 | } | |
1237 | ||
1238 | static struct usb_driver driver = { | |
459c51ad | 1239 | .name = KBUILD_MODNAME, |
e85d0918 DD |
1240 | .id_table = usb_ids, |
1241 | .probe = probe, | |
1242 | .disconnect = disconnect, | |
1243 | }; | |
1244 | ||
bc5f06a8 UK |
1245 | struct workqueue_struct *zd_workqueue; |
1246 | ||
e85d0918 DD |
1247 | static int __init usb_init(void) |
1248 | { | |
1249 | int r; | |
1250 | ||
741fec53 | 1251 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1252 | |
bc5f06a8 UK |
1253 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1254 | if (zd_workqueue == NULL) { | |
741fec53 | 1255 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1256 | return -ENOMEM; |
1257 | } | |
1258 | ||
e85d0918 DD |
1259 | r = usb_register(&driver); |
1260 | if (r) { | |
192b775c | 1261 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1262 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1263 | driver.name, r); | |
e85d0918 DD |
1264 | return r; |
1265 | } | |
1266 | ||
741fec53 | 1267 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1268 | return 0; |
1269 | } | |
1270 | ||
1271 | static void __exit usb_exit(void) | |
1272 | { | |
741fec53 | 1273 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1274 | usb_deregister(&driver); |
bc5f06a8 | 1275 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1276 | } |
1277 | ||
1278 | module_init(usb_init); | |
1279 | module_exit(usb_exit); | |
1280 | ||
1281 | static int usb_int_regs_length(unsigned int count) | |
1282 | { | |
1283 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1284 | } | |
1285 | ||
1286 | static void prepare_read_regs_int(struct zd_usb *usb) | |
1287 | { | |
1288 | struct zd_usb_interrupt *intr = &usb->intr; | |
1289 | ||
a68077de | 1290 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1291 | intr->read_regs_enabled = 1; |
1292 | INIT_COMPLETION(intr->read_regs.completion); | |
a68077de UK |
1293 | spin_unlock_irq(&intr->lock); |
1294 | } | |
1295 | ||
1296 | static void disable_read_regs_int(struct zd_usb *usb) | |
1297 | { | |
1298 | struct zd_usb_interrupt *intr = &usb->intr; | |
1299 | ||
1300 | spin_lock_irq(&intr->lock); | |
1301 | intr->read_regs_enabled = 0; | |
1302 | spin_unlock_irq(&intr->lock); | |
e85d0918 DD |
1303 | } |
1304 | ||
1305 | static int get_results(struct zd_usb *usb, u16 *values, | |
1306 | struct usb_req_read_regs *req, unsigned int count) | |
1307 | { | |
1308 | int r; | |
1309 | int i; | |
1310 | struct zd_usb_interrupt *intr = &usb->intr; | |
1311 | struct read_regs_int *rr = &intr->read_regs; | |
1312 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1313 | ||
a68077de | 1314 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1315 | |
1316 | r = -EIO; | |
1317 | /* The created block size seems to be larger than expected. | |
1318 | * However results appear to be correct. | |
1319 | */ | |
1320 | if (rr->length < usb_int_regs_length(count)) { | |
1321 | dev_dbg_f(zd_usb_dev(usb), | |
1322 | "error: actual length %d less than expected %d\n", | |
1323 | rr->length, usb_int_regs_length(count)); | |
1324 | goto error_unlock; | |
1325 | } | |
1326 | if (rr->length > sizeof(rr->buffer)) { | |
1327 | dev_dbg_f(zd_usb_dev(usb), | |
1328 | "error: actual length %d exceeds buffer size %zu\n", | |
1329 | rr->length, sizeof(rr->buffer)); | |
1330 | goto error_unlock; | |
1331 | } | |
1332 | ||
1333 | for (i = 0; i < count; i++) { | |
1334 | struct reg_data *rd = ®s->regs[i]; | |
1335 | if (rd->addr != req->addr[i]) { | |
1336 | dev_dbg_f(zd_usb_dev(usb), | |
1337 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1338 | le16_to_cpu(rd->addr), | |
1339 | le16_to_cpu(req->addr[i])); | |
1340 | goto error_unlock; | |
1341 | } | |
1342 | values[i] = le16_to_cpu(rd->value); | |
1343 | } | |
1344 | ||
1345 | r = 0; | |
1346 | error_unlock: | |
a68077de | 1347 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1348 | return r; |
1349 | } | |
1350 | ||
1351 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1352 | const zd_addr_t *addresses, unsigned int count) | |
1353 | { | |
1354 | int r; | |
1355 | int i, req_len, actual_req_len; | |
1356 | struct usb_device *udev; | |
1357 | struct usb_req_read_regs *req = NULL; | |
1358 | unsigned long timeout; | |
1359 | ||
1360 | if (count < 1) { | |
1361 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1362 | return -EINVAL; | |
1363 | } | |
1364 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1365 | dev_dbg_f(zd_usb_dev(usb), | |
1366 | "error: count %u exceeds possible max %u\n", | |
1367 | count, USB_MAX_IOREAD16_COUNT); | |
1368 | return -EINVAL; | |
1369 | } | |
1370 | if (in_atomic()) { | |
1371 | dev_dbg_f(zd_usb_dev(usb), | |
1372 | "error: io in atomic context not supported\n"); | |
1373 | return -EWOULDBLOCK; | |
1374 | } | |
1375 | if (!usb_int_enabled(usb)) { | |
1376 | dev_dbg_f(zd_usb_dev(usb), | |
1377 | "error: usb interrupt not enabled\n"); | |
1378 | return -EWOULDBLOCK; | |
1379 | } | |
1380 | ||
1381 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); | |
35c3404e | 1382 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1383 | if (!req) |
1384 | return -ENOMEM; | |
1385 | req->id = cpu_to_le16(USB_REQ_READ_REGS); | |
1386 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1387 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 DD |
1388 | |
1389 | udev = zd_usb_to_usbdev(usb); | |
1390 | prepare_read_regs_int(usb); | |
1391 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1392 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1393 | if (r) { | |
1394 | dev_dbg_f(zd_usb_dev(usb), | |
1395 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1396 | goto error; | |
1397 | } | |
1398 | if (req_len != actual_req_len) { | |
1399 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n" | |
1400 | " req_len %d != actual_req_len %d\n", | |
1401 | req_len, actual_req_len); | |
1402 | r = -EIO; | |
1403 | goto error; | |
1404 | } | |
1405 | ||
1406 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
1407 | msecs_to_jiffies(1000)); | |
1408 | if (!timeout) { | |
1409 | disable_read_regs_int(usb); | |
1410 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1411 | r = -ETIMEDOUT; | |
1412 | goto error; | |
1413 | } | |
1414 | ||
1415 | r = get_results(usb, values, req, count); | |
1416 | error: | |
1417 | kfree(req); | |
1418 | return r; | |
1419 | } | |
1420 | ||
1421 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, | |
1422 | unsigned int count) | |
1423 | { | |
1424 | int r; | |
1425 | struct usb_device *udev; | |
1426 | struct usb_req_write_regs *req = NULL; | |
1427 | int i, req_len, actual_req_len; | |
1428 | ||
1429 | if (count == 0) | |
1430 | return 0; | |
1431 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1432 | dev_dbg_f(zd_usb_dev(usb), | |
1433 | "error: count %u exceeds possible max %u\n", | |
1434 | count, USB_MAX_IOWRITE16_COUNT); | |
1435 | return -EINVAL; | |
1436 | } | |
1437 | if (in_atomic()) { | |
1438 | dev_dbg_f(zd_usb_dev(usb), | |
1439 | "error: io in atomic context not supported\n"); | |
1440 | return -EWOULDBLOCK; | |
1441 | } | |
1442 | ||
1443 | req_len = sizeof(struct usb_req_write_regs) + | |
1444 | count * sizeof(struct reg_data); | |
35c3404e | 1445 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1446 | if (!req) |
1447 | return -ENOMEM; | |
1448 | ||
1449 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1450 | for (i = 0; i < count; i++) { | |
1451 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1452 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1453 | rw->value = cpu_to_le16(ioreqs[i].value); |
1454 | } | |
1455 | ||
1456 | udev = zd_usb_to_usbdev(usb); | |
1457 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1458 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1459 | if (r) { | |
1460 | dev_dbg_f(zd_usb_dev(usb), | |
1461 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1462 | goto error; | |
1463 | } | |
1464 | if (req_len != actual_req_len) { | |
1465 | dev_dbg_f(zd_usb_dev(usb), | |
1466 | "error in usb_bulk_msg()" | |
1467 | " req_len %d != actual_req_len %d\n", | |
1468 | req_len, actual_req_len); | |
1469 | r = -EIO; | |
1470 | goto error; | |
1471 | } | |
1472 | ||
1473 | /* FALL-THROUGH with r == 0 */ | |
1474 | error: | |
1475 | kfree(req); | |
1476 | return r; | |
1477 | } | |
1478 | ||
1479 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) | |
1480 | { | |
1481 | int r; | |
1482 | struct usb_device *udev; | |
1483 | struct usb_req_rfwrite *req = NULL; | |
1484 | int i, req_len, actual_req_len; | |
1485 | u16 bit_value_template; | |
1486 | ||
1487 | if (in_atomic()) { | |
1488 | dev_dbg_f(zd_usb_dev(usb), | |
1489 | "error: io in atomic context not supported\n"); | |
1490 | return -EWOULDBLOCK; | |
1491 | } | |
1492 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1493 | dev_dbg_f(zd_usb_dev(usb), | |
1494 | "error: bits %d are smaller than" | |
1495 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1496 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1497 | return -EINVAL; | |
1498 | } | |
1499 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1500 | dev_dbg_f(zd_usb_dev(usb), | |
1501 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
1502 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
1503 | return -EINVAL; | |
1504 | } | |
1505 | #ifdef DEBUG | |
1506 | if (value & (~0UL << bits)) { | |
1507 | dev_dbg_f(zd_usb_dev(usb), | |
1508 | "error: value %#09x has bits >= %d set\n", | |
1509 | value, bits); | |
1510 | return -EINVAL; | |
1511 | } | |
1512 | #endif /* DEBUG */ | |
1513 | ||
1514 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
1515 | ||
1516 | r = zd_usb_ioread16(usb, &bit_value_template, CR203); | |
1517 | if (r) { | |
1518 | dev_dbg_f(zd_usb_dev(usb), | |
1519 | "error %d: Couldn't read CR203\n", r); | |
1520 | goto out; | |
1521 | } | |
1522 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
1523 | ||
1524 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); | |
35c3404e | 1525 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1526 | if (!req) |
1527 | return -ENOMEM; | |
1528 | ||
1529 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
1530 | /* 1: 3683a, but not used in ZYDAS driver */ | |
1531 | req->value = cpu_to_le16(2); | |
1532 | req->bits = cpu_to_le16(bits); | |
1533 | ||
1534 | for (i = 0; i < bits; i++) { | |
1535 | u16 bv = bit_value_template; | |
1536 | if (value & (1 << (bits-1-i))) | |
1537 | bv |= RF_DATA; | |
1538 | req->bit_values[i] = cpu_to_le16(bv); | |
1539 | } | |
1540 | ||
1541 | udev = zd_usb_to_usbdev(usb); | |
1542 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1543 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1544 | if (r) { | |
1545 | dev_dbg_f(zd_usb_dev(usb), | |
1546 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1547 | goto out; | |
1548 | } | |
1549 | if (req_len != actual_req_len) { | |
1550 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()" | |
1551 | " req_len %d != actual_req_len %d\n", | |
1552 | req_len, actual_req_len); | |
1553 | r = -EIO; | |
1554 | goto out; | |
1555 | } | |
1556 | ||
1557 | /* FALL-THROUGH with r == 0 */ | |
1558 | out: | |
1559 | kfree(req); | |
1560 | return r; | |
1561 | } |