]>
Commit | Line | Data |
---|---|---|
66bb42fd DD |
1 | /* ZD1211 USB-WLAN driver for Linux |
2 | * | |
3 | * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de> | |
4 | * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org> | |
5 | * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net> | |
e85d0918 DD |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
d066c219 | 22 | #include <linux/kernel.h> |
e85d0918 | 23 | #include <linux/init.h> |
e85d0918 DD |
24 | #include <linux/firmware.h> |
25 | #include <linux/device.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/usb.h> | |
bc5f06a8 | 29 | #include <linux/workqueue.h> |
459c51ad | 30 | #include <net/mac80211.h> |
c248725b | 31 | #include <asm/unaligned.h> |
e85d0918 DD |
32 | |
33 | #include "zd_def.h" | |
e85d0918 DD |
34 | #include "zd_mac.h" |
35 | #include "zd_usb.h" | |
e85d0918 DD |
36 | |
37 | static struct usb_device_id usb_ids[] = { | |
38 | /* ZD1211 */ | |
39 | { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 }, | |
40 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 }, | |
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 }, |
e85d0918 DD |
61 | /* ZD1211B */ |
62 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, | |
63 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, | |
dd2f5538 | 64 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
943599ee | 65 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, |
8e87295b | 66 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, |
9dfd5500 | 67 | { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B }, |
a2bdcc67 DD |
68 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, |
69 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
33218ba1 | 70 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, |
2e9b2467 | 71 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, |
aec91028 DD |
72 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
73 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
c445a31c | 74 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
5d082fe8 | 75 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, |
187bb417 | 76 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, |
019a6755 | 77 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
93f510bb | 78 | { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
6eb07250 | 79 | { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, |
25343469 | 80 | { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
8e97afe5 | 81 | { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
475fed1e | 82 | { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B }, |
61ef6062 | 83 | { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B }, |
a1030e92 DD |
84 | /* "Driverless" devices that need ejecting */ |
85 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 86 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
87 | {} |
88 | }; | |
89 | ||
90 | MODULE_LICENSE("GPL"); | |
91 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
92 | MODULE_AUTHOR("Ulrich Kunitz"); | |
93 | MODULE_AUTHOR("Daniel Drake"); | |
94 | MODULE_VERSION("1.0"); | |
95 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
96 | ||
97 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
98 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
99 | ||
e85d0918 | 100 | /* USB device initialization */ |
72e77a8a | 101 | static void int_urb_complete(struct urb *urb); |
e85d0918 DD |
102 | |
103 | static int request_fw_file( | |
104 | const struct firmware **fw, const char *name, struct device *device) | |
105 | { | |
106 | int r; | |
107 | ||
108 | dev_dbg_f(device, "fw name %s\n", name); | |
109 | ||
110 | r = request_firmware(fw, name, device); | |
111 | if (r) | |
112 | dev_err(device, | |
113 | "Could not load firmware file %s. Error number %d\n", | |
114 | name, r); | |
115 | return r; | |
116 | } | |
117 | ||
118 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
119 | { | |
120 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
121 | } | |
122 | ||
123 | enum upload_code_flags { | |
124 | REBOOT = 1, | |
125 | }; | |
126 | ||
127 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
128 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
129 | ||
130 | static int upload_code(struct usb_device *udev, | |
131 | const u8 *data, size_t size, u16 code_offset, int flags) | |
132 | { | |
133 | u8 *p; | |
134 | int r; | |
135 | ||
136 | /* USB request blocks need "kmalloced" buffers. | |
137 | */ | |
138 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
139 | if (!p) { | |
140 | dev_err(&udev->dev, "out of memory\n"); | |
141 | r = -ENOMEM; | |
142 | goto error; | |
143 | } | |
144 | ||
145 | size &= ~1; | |
146 | while (size > 0) { | |
147 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
148 | size : MAX_TRANSFER_SIZE; | |
149 | ||
150 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
151 | ||
152 | memcpy(p, data, transfer_size); | |
153 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
154 | USB_REQ_FIRMWARE_DOWNLOAD, | |
155 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
156 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
157 | if (r < 0) { | |
158 | dev_err(&udev->dev, | |
159 | "USB control request for firmware upload" | |
160 | " failed. Error number %d\n", r); | |
161 | goto error; | |
162 | } | |
163 | transfer_size = r & ~1; | |
164 | ||
165 | size -= transfer_size; | |
166 | data += transfer_size; | |
167 | code_offset += transfer_size/sizeof(u16); | |
168 | } | |
169 | ||
170 | if (flags & REBOOT) { | |
171 | u8 ret; | |
172 | ||
173 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
174 | USB_REQ_FIRMWARE_CONFIRM, | |
175 | USB_DIR_IN | USB_TYPE_VENDOR, | |
176 | 0, 0, &ret, sizeof(ret), 5000 /* ms */); | |
177 | if (r != sizeof(ret)) { | |
178 | dev_err(&udev->dev, | |
179 | "control request firmeware confirmation failed." | |
180 | " Return value %d\n", r); | |
181 | if (r >= 0) | |
182 | r = -ENODEV; | |
183 | goto error; | |
184 | } | |
185 | if (ret & 0x80) { | |
186 | dev_err(&udev->dev, | |
187 | "Internal error while downloading." | |
188 | " Firmware confirm return value %#04x\n", | |
189 | (unsigned int)ret); | |
190 | r = -ENODEV; | |
191 | goto error; | |
192 | } | |
193 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
194 | (unsigned int)ret); | |
195 | } | |
196 | ||
197 | r = 0; | |
198 | error: | |
199 | kfree(p); | |
200 | return r; | |
201 | } | |
202 | ||
203 | static u16 get_word(const void *data, u16 offset) | |
204 | { | |
205 | const __le16 *p = data; | |
206 | return le16_to_cpu(p[offset]); | |
207 | } | |
208 | ||
74553aed | 209 | static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
e85d0918 DD |
210 | const char* postfix) |
211 | { | |
212 | scnprintf(buffer, size, "%s%s", | |
74553aed | 213 | usb->is_zd1211b ? |
e85d0918 DD |
214 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
215 | postfix); | |
216 | return buffer; | |
217 | } | |
218 | ||
74553aed | 219 | static int handle_version_mismatch(struct zd_usb *usb, |
d066c219 DD |
220 | const struct firmware *ub_fw) |
221 | { | |
74553aed | 222 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
d066c219 DD |
223 | const struct firmware *ur_fw = NULL; |
224 | int offset; | |
225 | int r = 0; | |
226 | char fw_name[128]; | |
227 | ||
228 | r = request_fw_file(&ur_fw, | |
74553aed | 229 | get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
d066c219 DD |
230 | &udev->dev); |
231 | if (r) | |
232 | goto error; | |
233 | ||
ee302767 | 234 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
235 | if (r) |
236 | goto error; | |
237 | ||
ee302767 | 238 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 239 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 240 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
241 | |
242 | /* At this point, the vendor driver downloads the whole firmware | |
243 | * image, hacks around with version IDs, and uploads it again, | |
244 | * completely overwriting the boot code. We do not do this here as | |
245 | * it is not required on any tested devices, and it is suspected to | |
246 | * cause problems. */ | |
247 | error: | |
248 | release_firmware(ur_fw); | |
249 | return r; | |
250 | } | |
251 | ||
74553aed | 252 | static int upload_firmware(struct zd_usb *usb) |
e85d0918 DD |
253 | { |
254 | int r; | |
255 | u16 fw_bcdDevice; | |
256 | u16 bcdDevice; | |
74553aed | 257 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
258 | const struct firmware *ub_fw = NULL; |
259 | const struct firmware *uph_fw = NULL; | |
260 | char fw_name[128]; | |
261 | ||
262 | bcdDevice = get_bcdDevice(udev); | |
263 | ||
264 | r = request_fw_file(&ub_fw, | |
74553aed | 265 | get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
e85d0918 DD |
266 | &udev->dev); |
267 | if (r) | |
268 | goto error; | |
269 | ||
ee302767 | 270 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 271 | |
e85d0918 DD |
272 | if (fw_bcdDevice != bcdDevice) { |
273 | dev_info(&udev->dev, | |
d066c219 DD |
274 | "firmware version %#06x and device bootcode version " |
275 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
276 | if (bcdDevice <= 0x4313) | |
277 | dev_warn(&udev->dev, "device has old bootcode, please " | |
278 | "report success or failure\n"); | |
279 | ||
74553aed | 280 | r = handle_version_mismatch(usb, ub_fw); |
d066c219 DD |
281 | if (r) |
282 | goto error; | |
e85d0918 DD |
283 | } else { |
284 | dev_dbg_f(&udev->dev, | |
285 | "firmware device id %#06x is equal to the " | |
286 | "actual device id\n", fw_bcdDevice); | |
287 | } | |
288 | ||
289 | ||
290 | r = request_fw_file(&uph_fw, | |
74553aed | 291 | get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
e85d0918 DD |
292 | &udev->dev); |
293 | if (r) | |
294 | goto error; | |
295 | ||
ee302767 | 296 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
297 | if (r) { |
298 | dev_err(&udev->dev, | |
299 | "Could not upload firmware code uph. Error number %d\n", | |
300 | r); | |
301 | } | |
302 | ||
303 | /* FALL-THROUGH */ | |
304 | error: | |
305 | release_firmware(ub_fw); | |
306 | release_firmware(uph_fw); | |
307 | return r; | |
308 | } | |
309 | ||
74553aed DD |
310 | /* Read data from device address space using "firmware interface" which does |
311 | * not require firmware to be loaded. */ | |
312 | int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) | |
313 | { | |
314 | int r; | |
315 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
316 | ||
317 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
318 | USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, | |
319 | data, len, 5000); | |
320 | if (r < 0) { | |
321 | dev_err(&udev->dev, | |
322 | "read over firmware interface failed: %d\n", r); | |
323 | return r; | |
324 | } else if (r != len) { | |
325 | dev_err(&udev->dev, | |
326 | "incomplete read over firmware interface: %d/%d\n", | |
327 | r, len); | |
328 | return -EIO; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
e85d0918 DD |
334 | #define urb_dev(urb) (&(urb)->dev->dev) |
335 | ||
336 | static inline void handle_regs_int(struct urb *urb) | |
337 | { | |
338 | struct zd_usb *usb = urb->context; | |
339 | struct zd_usb_interrupt *intr = &usb->intr; | |
340 | int len; | |
72e77a8a | 341 | u16 int_num; |
e85d0918 DD |
342 | |
343 | ZD_ASSERT(in_interrupt()); | |
344 | spin_lock(&intr->lock); | |
345 | ||
4ec7ffa2 | 346 | int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); |
72e77a8a LCC |
347 | if (int_num == CR_INTERRUPT) { |
348 | struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); | |
349 | memcpy(&mac->intr_buffer, urb->transfer_buffer, | |
350 | USB_MAX_EP_INT_BUFFER); | |
351 | schedule_work(&mac->process_intr); | |
352 | } else if (intr->read_regs_enabled) { | |
e85d0918 DD |
353 | intr->read_regs.length = len = urb->actual_length; |
354 | ||
355 | if (len > sizeof(intr->read_regs.buffer)) | |
356 | len = sizeof(intr->read_regs.buffer); | |
357 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); | |
358 | intr->read_regs_enabled = 0; | |
359 | complete(&intr->read_regs.completion); | |
360 | goto out; | |
361 | } | |
362 | ||
e85d0918 DD |
363 | out: |
364 | spin_unlock(&intr->lock); | |
365 | } | |
366 | ||
7d12e780 | 367 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
368 | { |
369 | int r; | |
370 | struct usb_int_header *hdr; | |
371 | ||
372 | switch (urb->status) { | |
373 | case 0: | |
374 | break; | |
375 | case -ESHUTDOWN: | |
376 | case -EINVAL: | |
377 | case -ENODEV: | |
378 | case -ENOENT: | |
379 | case -ECONNRESET: | |
e85d0918 | 380 | case -EPIPE: |
b312d799 | 381 | goto kfree; |
e85d0918 DD |
382 | default: |
383 | goto resubmit; | |
384 | } | |
385 | ||
386 | if (urb->actual_length < sizeof(hdr)) { | |
387 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
388 | goto resubmit; | |
389 | } | |
390 | ||
391 | hdr = urb->transfer_buffer; | |
392 | if (hdr->type != USB_INT_TYPE) { | |
393 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
394 | goto resubmit; | |
395 | } | |
396 | ||
397 | switch (hdr->id) { | |
398 | case USB_INT_ID_REGS: | |
399 | handle_regs_int(urb); | |
400 | break; | |
401 | case USB_INT_ID_RETRY_FAILED: | |
459c51ad | 402 | zd_mac_tx_failed(zd_usb_to_hw(urb->context)); |
e85d0918 DD |
403 | break; |
404 | default: | |
405 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
406 | (unsigned int)hdr->id); | |
407 | goto resubmit; | |
408 | } | |
409 | ||
410 | resubmit: | |
411 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
412 | if (r) { | |
413 | dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb); | |
414 | goto kfree; | |
415 | } | |
416 | return; | |
417 | kfree: | |
418 | kfree(urb->transfer_buffer); | |
419 | } | |
420 | ||
421 | static inline int int_urb_interval(struct usb_device *udev) | |
422 | { | |
423 | switch (udev->speed) { | |
424 | case USB_SPEED_HIGH: | |
425 | return 4; | |
426 | case USB_SPEED_LOW: | |
427 | return 10; | |
428 | case USB_SPEED_FULL: | |
429 | default: | |
430 | return 1; | |
431 | } | |
432 | } | |
433 | ||
434 | static inline int usb_int_enabled(struct zd_usb *usb) | |
435 | { | |
436 | unsigned long flags; | |
437 | struct zd_usb_interrupt *intr = &usb->intr; | |
438 | struct urb *urb; | |
439 | ||
440 | spin_lock_irqsave(&intr->lock, flags); | |
441 | urb = intr->urb; | |
442 | spin_unlock_irqrestore(&intr->lock, flags); | |
443 | return urb != NULL; | |
444 | } | |
445 | ||
446 | int zd_usb_enable_int(struct zd_usb *usb) | |
447 | { | |
448 | int r; | |
449 | struct usb_device *udev; | |
450 | struct zd_usb_interrupt *intr = &usb->intr; | |
451 | void *transfer_buffer = NULL; | |
452 | struct urb *urb; | |
453 | ||
454 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
455 | ||
35c3404e | 456 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
457 | if (!urb) { |
458 | r = -ENOMEM; | |
459 | goto out; | |
460 | } | |
461 | ||
462 | ZD_ASSERT(!irqs_disabled()); | |
463 | spin_lock_irq(&intr->lock); | |
464 | if (intr->urb) { | |
465 | spin_unlock_irq(&intr->lock); | |
466 | r = 0; | |
467 | goto error_free_urb; | |
468 | } | |
469 | intr->urb = urb; | |
470 | spin_unlock_irq(&intr->lock); | |
471 | ||
472 | /* TODO: make it a DMA buffer */ | |
473 | r = -ENOMEM; | |
35c3404e | 474 | transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL); |
e85d0918 DD |
475 | if (!transfer_buffer) { |
476 | dev_dbg_f(zd_usb_dev(usb), | |
477 | "couldn't allocate transfer_buffer\n"); | |
478 | goto error_set_urb_null; | |
479 | } | |
480 | ||
481 | udev = zd_usb_to_usbdev(usb); | |
482 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), | |
483 | transfer_buffer, USB_MAX_EP_INT_BUFFER, | |
484 | int_urb_complete, usb, | |
485 | intr->interval); | |
486 | ||
487 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 488 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
489 | if (r) { |
490 | dev_dbg_f(zd_usb_dev(usb), | |
491 | "Couldn't submit urb. Error number %d\n", r); | |
492 | goto error; | |
493 | } | |
494 | ||
495 | return 0; | |
496 | error: | |
497 | kfree(transfer_buffer); | |
498 | error_set_urb_null: | |
499 | spin_lock_irq(&intr->lock); | |
500 | intr->urb = NULL; | |
501 | spin_unlock_irq(&intr->lock); | |
502 | error_free_urb: | |
503 | usb_free_urb(urb); | |
504 | out: | |
505 | return r; | |
506 | } | |
507 | ||
508 | void zd_usb_disable_int(struct zd_usb *usb) | |
509 | { | |
510 | unsigned long flags; | |
511 | struct zd_usb_interrupt *intr = &usb->intr; | |
512 | struct urb *urb; | |
513 | ||
514 | spin_lock_irqsave(&intr->lock, flags); | |
515 | urb = intr->urb; | |
516 | if (!urb) { | |
517 | spin_unlock_irqrestore(&intr->lock, flags); | |
518 | return; | |
519 | } | |
520 | intr->urb = NULL; | |
521 | spin_unlock_irqrestore(&intr->lock, flags); | |
522 | ||
523 | usb_kill_urb(urb); | |
524 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
525 | usb_free_urb(urb); | |
526 | } | |
527 | ||
528 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
529 | unsigned int length) | |
530 | { | |
531 | int i; | |
e85d0918 DD |
532 | const struct rx_length_info *length_info; |
533 | ||
534 | if (length < sizeof(struct rx_length_info)) { | |
535 | /* It's not a complete packet anyhow. */ | |
536 | return; | |
537 | } | |
538 | length_info = (struct rx_length_info *) | |
539 | (buffer + length - sizeof(struct rx_length_info)); | |
540 | ||
541 | /* It might be that three frames are merged into a single URB | |
542 | * transaction. We have to check for the length info tag. | |
543 | * | |
544 | * While testing we discovered that length_info might be unaligned, | |
545 | * because if USB transactions are merged, the last packet will not | |
546 | * be padded. Unaligned access might also happen if the length_info | |
547 | * structure is not present. | |
548 | */ | |
533dd1b0 | 549 | if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG) |
b269825b | 550 | { |
e85d0918 DD |
551 | unsigned int l, k, n; |
552 | for (i = 0, l = 0;; i++) { | |
533dd1b0 | 553 | k = get_unaligned_le16(&length_info->length[i]); |
850c211c UK |
554 | if (k == 0) |
555 | return; | |
e85d0918 DD |
556 | n = l+k; |
557 | if (n > length) | |
558 | return; | |
459c51ad | 559 | zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k); |
e85d0918 DD |
560 | if (i >= 2) |
561 | return; | |
562 | l = (n+3) & ~3; | |
563 | } | |
564 | } else { | |
459c51ad | 565 | zd_mac_rx(zd_usb_to_hw(usb), buffer, length); |
e85d0918 DD |
566 | } |
567 | } | |
568 | ||
7d12e780 | 569 | static void rx_urb_complete(struct urb *urb) |
e85d0918 DD |
570 | { |
571 | struct zd_usb *usb; | |
572 | struct zd_usb_rx *rx; | |
573 | const u8 *buffer; | |
574 | unsigned int length; | |
575 | ||
576 | switch (urb->status) { | |
577 | case 0: | |
578 | break; | |
579 | case -ESHUTDOWN: | |
580 | case -EINVAL: | |
581 | case -ENODEV: | |
582 | case -ENOENT: | |
583 | case -ECONNRESET: | |
e85d0918 | 584 | case -EPIPE: |
b312d799 | 585 | return; |
e85d0918 DD |
586 | default: |
587 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
588 | goto resubmit; | |
589 | } | |
590 | ||
591 | buffer = urb->transfer_buffer; | |
592 | length = urb->actual_length; | |
593 | usb = urb->context; | |
594 | rx = &usb->rx; | |
595 | ||
596 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { | |
597 | /* If there is an old first fragment, we don't care. */ | |
598 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
599 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
600 | spin_lock(&rx->lock); | |
601 | memcpy(rx->fragment, buffer, length); | |
602 | rx->fragment_length = length; | |
603 | spin_unlock(&rx->lock); | |
604 | goto resubmit; | |
605 | } | |
606 | ||
607 | spin_lock(&rx->lock); | |
608 | if (rx->fragment_length > 0) { | |
609 | /* We are on a second fragment, we believe */ | |
610 | ZD_ASSERT(length + rx->fragment_length <= | |
611 | ARRAY_SIZE(rx->fragment)); | |
612 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
613 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
614 | handle_rx_packet(usb, rx->fragment, | |
615 | rx->fragment_length + length); | |
616 | rx->fragment_length = 0; | |
617 | spin_unlock(&rx->lock); | |
618 | } else { | |
619 | spin_unlock(&rx->lock); | |
620 | handle_rx_packet(usb, buffer, length); | |
621 | } | |
622 | ||
623 | resubmit: | |
624 | usb_submit_urb(urb, GFP_ATOMIC); | |
625 | } | |
626 | ||
459c51ad | 627 | static struct urb *alloc_rx_urb(struct zd_usb *usb) |
e85d0918 DD |
628 | { |
629 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
630 | struct urb *urb; | |
631 | void *buffer; | |
632 | ||
35c3404e | 633 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
634 | if (!urb) |
635 | return NULL; | |
35c3404e | 636 | buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
e85d0918 DD |
637 | &urb->transfer_dma); |
638 | if (!buffer) { | |
639 | usb_free_urb(urb); | |
640 | return NULL; | |
641 | } | |
642 | ||
643 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
644 | buffer, USB_MAX_RX_SIZE, | |
645 | rx_urb_complete, usb); | |
646 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
647 | ||
648 | return urb; | |
649 | } | |
650 | ||
459c51ad | 651 | static void free_rx_urb(struct urb *urb) |
e85d0918 DD |
652 | { |
653 | if (!urb) | |
654 | return; | |
655 | usb_buffer_free(urb->dev, urb->transfer_buffer_length, | |
656 | urb->transfer_buffer, urb->transfer_dma); | |
657 | usb_free_urb(urb); | |
658 | } | |
659 | ||
660 | int zd_usb_enable_rx(struct zd_usb *usb) | |
661 | { | |
662 | int i, r; | |
663 | struct zd_usb_rx *rx = &usb->rx; | |
664 | struct urb **urbs; | |
665 | ||
666 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
667 | ||
668 | r = -ENOMEM; | |
459c51ad | 669 | urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
670 | if (!urbs) |
671 | goto error; | |
459c51ad DD |
672 | for (i = 0; i < RX_URBS_COUNT; i++) { |
673 | urbs[i] = alloc_rx_urb(usb); | |
e85d0918 DD |
674 | if (!urbs[i]) |
675 | goto error; | |
676 | } | |
677 | ||
678 | ZD_ASSERT(!irqs_disabled()); | |
679 | spin_lock_irq(&rx->lock); | |
680 | if (rx->urbs) { | |
681 | spin_unlock_irq(&rx->lock); | |
682 | r = 0; | |
683 | goto error; | |
684 | } | |
685 | rx->urbs = urbs; | |
459c51ad | 686 | rx->urbs_count = RX_URBS_COUNT; |
e85d0918 DD |
687 | spin_unlock_irq(&rx->lock); |
688 | ||
459c51ad | 689 | for (i = 0; i < RX_URBS_COUNT; i++) { |
35c3404e | 690 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
691 | if (r) |
692 | goto error_submit; | |
693 | } | |
694 | ||
695 | return 0; | |
696 | error_submit: | |
459c51ad | 697 | for (i = 0; i < RX_URBS_COUNT; i++) { |
e85d0918 DD |
698 | usb_kill_urb(urbs[i]); |
699 | } | |
700 | spin_lock_irq(&rx->lock); | |
701 | rx->urbs = NULL; | |
702 | rx->urbs_count = 0; | |
703 | spin_unlock_irq(&rx->lock); | |
704 | error: | |
705 | if (urbs) { | |
459c51ad DD |
706 | for (i = 0; i < RX_URBS_COUNT; i++) |
707 | free_rx_urb(urbs[i]); | |
e85d0918 DD |
708 | } |
709 | return r; | |
710 | } | |
711 | ||
712 | void zd_usb_disable_rx(struct zd_usb *usb) | |
713 | { | |
714 | int i; | |
715 | unsigned long flags; | |
716 | struct urb **urbs; | |
717 | unsigned int count; | |
718 | struct zd_usb_rx *rx = &usb->rx; | |
719 | ||
720 | spin_lock_irqsave(&rx->lock, flags); | |
721 | urbs = rx->urbs; | |
722 | count = rx->urbs_count; | |
723 | spin_unlock_irqrestore(&rx->lock, flags); | |
724 | if (!urbs) | |
725 | return; | |
726 | ||
727 | for (i = 0; i < count; i++) { | |
728 | usb_kill_urb(urbs[i]); | |
459c51ad | 729 | free_rx_urb(urbs[i]); |
e85d0918 DD |
730 | } |
731 | kfree(urbs); | |
732 | ||
733 | spin_lock_irqsave(&rx->lock, flags); | |
734 | rx->urbs = NULL; | |
735 | rx->urbs_count = 0; | |
736 | spin_unlock_irqrestore(&rx->lock, flags); | |
737 | } | |
738 | ||
459c51ad DD |
739 | /** |
740 | * zd_usb_disable_tx - disable transmission | |
741 | * @usb: the zd1211rw-private USB structure | |
742 | * | |
743 | * Frees all URBs in the free list and marks the transmission as disabled. | |
744 | */ | |
745 | void zd_usb_disable_tx(struct zd_usb *usb) | |
746 | { | |
747 | struct zd_usb_tx *tx = &usb->tx; | |
748 | unsigned long flags; | |
749 | struct list_head *pos, *n; | |
750 | ||
751 | spin_lock_irqsave(&tx->lock, flags); | |
752 | list_for_each_safe(pos, n, &tx->free_urb_list) { | |
753 | list_del(pos); | |
754 | usb_free_urb(list_entry(pos, struct urb, urb_list)); | |
755 | } | |
756 | tx->enabled = 0; | |
757 | tx->submitted_urbs = 0; | |
758 | /* The stopped state is ignored, relying on ieee80211_wake_queues() | |
759 | * in a potentionally following zd_usb_enable_tx(). | |
760 | */ | |
761 | spin_unlock_irqrestore(&tx->lock, flags); | |
762 | } | |
763 | ||
764 | /** | |
765 | * zd_usb_enable_tx - enables transmission | |
766 | * @usb: a &struct zd_usb pointer | |
767 | * | |
768 | * This function enables transmission and prepares the &zd_usb_tx data | |
769 | * structure. | |
770 | */ | |
771 | void zd_usb_enable_tx(struct zd_usb *usb) | |
772 | { | |
773 | unsigned long flags; | |
774 | struct zd_usb_tx *tx = &usb->tx; | |
775 | ||
776 | spin_lock_irqsave(&tx->lock, flags); | |
777 | tx->enabled = 1; | |
778 | tx->submitted_urbs = 0; | |
779 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
780 | tx->stopped = 0; | |
781 | spin_unlock_irqrestore(&tx->lock, flags); | |
782 | } | |
783 | ||
784 | /** | |
785 | * alloc_tx_urb - provides an tx URB | |
786 | * @usb: a &struct zd_usb pointer | |
787 | * | |
788 | * Allocates a new URB. If possible takes the urb from the free list in | |
789 | * usb->tx. | |
790 | */ | |
791 | static struct urb *alloc_tx_urb(struct zd_usb *usb) | |
792 | { | |
793 | struct zd_usb_tx *tx = &usb->tx; | |
794 | unsigned long flags; | |
795 | struct list_head *entry; | |
796 | struct urb *urb; | |
797 | ||
798 | spin_lock_irqsave(&tx->lock, flags); | |
799 | if (list_empty(&tx->free_urb_list)) { | |
800 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
801 | goto out; | |
802 | } | |
803 | entry = tx->free_urb_list.next; | |
804 | list_del(entry); | |
805 | urb = list_entry(entry, struct urb, urb_list); | |
806 | out: | |
807 | spin_unlock_irqrestore(&tx->lock, flags); | |
808 | return urb; | |
809 | } | |
810 | ||
811 | /** | |
812 | * free_tx_urb - frees a used tx URB | |
813 | * @usb: a &struct zd_usb pointer | |
814 | * @urb: URB to be freed | |
815 | * | |
816 | * Frees the the transmission URB, which means to put it on the free URB | |
817 | * list. | |
818 | */ | |
819 | static void free_tx_urb(struct zd_usb *usb, struct urb *urb) | |
820 | { | |
821 | struct zd_usb_tx *tx = &usb->tx; | |
822 | unsigned long flags; | |
823 | ||
824 | spin_lock_irqsave(&tx->lock, flags); | |
825 | if (!tx->enabled) { | |
826 | usb_free_urb(urb); | |
827 | goto out; | |
828 | } | |
829 | list_add(&urb->urb_list, &tx->free_urb_list); | |
830 | out: | |
831 | spin_unlock_irqrestore(&tx->lock, flags); | |
832 | } | |
833 | ||
834 | static void tx_dec_submitted_urbs(struct zd_usb *usb) | |
835 | { | |
836 | struct zd_usb_tx *tx = &usb->tx; | |
837 | unsigned long flags; | |
838 | ||
839 | spin_lock_irqsave(&tx->lock, flags); | |
840 | --tx->submitted_urbs; | |
841 | if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) { | |
842 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
843 | tx->stopped = 0; | |
844 | } | |
845 | spin_unlock_irqrestore(&tx->lock, flags); | |
846 | } | |
847 | ||
848 | static void tx_inc_submitted_urbs(struct zd_usb *usb) | |
849 | { | |
850 | struct zd_usb_tx *tx = &usb->tx; | |
851 | unsigned long flags; | |
852 | ||
853 | spin_lock_irqsave(&tx->lock, flags); | |
854 | ++tx->submitted_urbs; | |
855 | if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) { | |
856 | ieee80211_stop_queues(zd_usb_to_hw(usb)); | |
857 | tx->stopped = 1; | |
858 | } | |
859 | spin_unlock_irqrestore(&tx->lock, flags); | |
860 | } | |
861 | ||
862 | /** | |
863 | * tx_urb_complete - completes the execution of an URB | |
864 | * @urb: a URB | |
865 | * | |
866 | * This function is called if the URB has been transferred to a device or an | |
867 | * error has happened. | |
868 | */ | |
7d12e780 | 869 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
870 | { |
871 | int r; | |
459c51ad DD |
872 | struct sk_buff *skb; |
873 | struct zd_tx_skb_control_block *cb; | |
874 | struct zd_usb *usb; | |
e85d0918 DD |
875 | |
876 | switch (urb->status) { | |
877 | case 0: | |
878 | break; | |
879 | case -ESHUTDOWN: | |
880 | case -EINVAL: | |
881 | case -ENODEV: | |
882 | case -ENOENT: | |
883 | case -ECONNRESET: | |
b312d799 | 884 | case -EPIPE: |
e85d0918 DD |
885 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
886 | break; | |
e85d0918 DD |
887 | default: |
888 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
889 | goto resubmit; | |
890 | } | |
891 | free_urb: | |
459c51ad | 892 | skb = (struct sk_buff *)urb->context; |
dbabad0c JB |
893 | /* |
894 | * grab 'usb' pointer before handing off the skb (since | |
895 | * it might be freed by zd_mac_tx_to_dev or mac80211) | |
896 | */ | |
459c51ad DD |
897 | cb = (struct zd_tx_skb_control_block *)skb->cb; |
898 | usb = &zd_hw_mac(cb->hw)->chip.usb; | |
dbabad0c | 899 | zd_mac_tx_to_dev(skb, urb->status); |
459c51ad DD |
900 | free_tx_urb(usb, urb); |
901 | tx_dec_submitted_urbs(usb); | |
e85d0918 DD |
902 | return; |
903 | resubmit: | |
904 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
905 | if (r) { | |
906 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); | |
907 | goto free_urb; | |
908 | } | |
909 | } | |
910 | ||
459c51ad DD |
911 | /** |
912 | * zd_usb_tx: initiates transfer of a frame of the device | |
913 | * | |
914 | * @usb: the zd1211rw-private USB structure | |
915 | * @skb: a &struct sk_buff pointer | |
916 | * | |
917 | * This function tranmits a frame to the device. It doesn't wait for | |
918 | * completion. The frame must contain the control set and have all the | |
919 | * control set information available. | |
920 | * | |
921 | * The function returns 0 if the transfer has been successfully initiated. | |
e85d0918 | 922 | */ |
459c51ad | 923 | int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb) |
e85d0918 DD |
924 | { |
925 | int r; | |
926 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
927 | struct urb *urb; | |
e85d0918 | 928 | |
459c51ad | 929 | urb = alloc_tx_urb(usb); |
e85d0918 DD |
930 | if (!urb) { |
931 | r = -ENOMEM; | |
932 | goto out; | |
933 | } | |
934 | ||
e85d0918 | 935 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
459c51ad | 936 | skb->data, skb->len, tx_urb_complete, skb); |
e85d0918 DD |
937 | |
938 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
939 | if (r) | |
940 | goto error; | |
459c51ad | 941 | tx_inc_submitted_urbs(usb); |
e85d0918 DD |
942 | return 0; |
943 | error: | |
459c51ad | 944 | free_tx_urb(usb, urb); |
e85d0918 DD |
945 | out: |
946 | return r; | |
947 | } | |
948 | ||
949 | static inline void init_usb_interrupt(struct zd_usb *usb) | |
950 | { | |
951 | struct zd_usb_interrupt *intr = &usb->intr; | |
952 | ||
953 | spin_lock_init(&intr->lock); | |
954 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
955 | init_completion(&intr->read_regs.completion); | |
0ce34bc8 | 956 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
957 | } |
958 | ||
959 | static inline void init_usb_rx(struct zd_usb *usb) | |
960 | { | |
961 | struct zd_usb_rx *rx = &usb->rx; | |
962 | spin_lock_init(&rx->lock); | |
963 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { | |
964 | rx->usb_packet_size = 512; | |
965 | } else { | |
966 | rx->usb_packet_size = 64; | |
967 | } | |
968 | ZD_ASSERT(rx->fragment_length == 0); | |
969 | } | |
970 | ||
971 | static inline void init_usb_tx(struct zd_usb *usb) | |
972 | { | |
459c51ad DD |
973 | struct zd_usb_tx *tx = &usb->tx; |
974 | spin_lock_init(&tx->lock); | |
975 | tx->enabled = 0; | |
976 | tx->stopped = 0; | |
977 | INIT_LIST_HEAD(&tx->free_urb_list); | |
978 | tx->submitted_urbs = 0; | |
e85d0918 DD |
979 | } |
980 | ||
459c51ad | 981 | void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw, |
e85d0918 DD |
982 | struct usb_interface *intf) |
983 | { | |
984 | memset(usb, 0, sizeof(*usb)); | |
985 | usb->intf = usb_get_intf(intf); | |
459c51ad | 986 | usb_set_intfdata(usb->intf, hw); |
e85d0918 DD |
987 | init_usb_interrupt(usb); |
988 | init_usb_tx(usb); | |
989 | init_usb_rx(usb); | |
990 | } | |
991 | ||
e85d0918 DD |
992 | void zd_usb_clear(struct zd_usb *usb) |
993 | { | |
994 | usb_set_intfdata(usb->intf, NULL); | |
995 | usb_put_intf(usb->intf); | |
c48cf125 | 996 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
997 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
998 | } | |
999 | ||
1000 | static const char *speed(enum usb_device_speed speed) | |
1001 | { | |
1002 | switch (speed) { | |
1003 | case USB_SPEED_LOW: | |
1004 | return "low"; | |
1005 | case USB_SPEED_FULL: | |
1006 | return "full"; | |
1007 | case USB_SPEED_HIGH: | |
1008 | return "high"; | |
1009 | default: | |
1010 | return "unknown speed"; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
1015 | { | |
1016 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
1017 | le16_to_cpu(udev->descriptor.idVendor), | |
1018 | le16_to_cpu(udev->descriptor.idProduct), | |
1019 | get_bcdDevice(udev), | |
1020 | speed(udev->speed)); | |
1021 | } | |
1022 | ||
1023 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
1024 | { | |
1025 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
1026 | return scnprint_id(udev, buffer, size); | |
1027 | } | |
1028 | ||
1029 | #ifdef DEBUG | |
1030 | static void print_id(struct usb_device *udev) | |
1031 | { | |
1032 | char buffer[40]; | |
1033 | ||
1034 | scnprint_id(udev, buffer, sizeof(buffer)); | |
1035 | buffer[sizeof(buffer)-1] = 0; | |
1036 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
1037 | } | |
1038 | #else | |
1039 | #define print_id(udev) do { } while (0) | |
1040 | #endif | |
1041 | ||
a1030e92 DD |
1042 | static int eject_installer(struct usb_interface *intf) |
1043 | { | |
1044 | struct usb_device *udev = interface_to_usbdev(intf); | |
1045 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
1046 | struct usb_endpoint_descriptor *endpoint; | |
1047 | unsigned char *cmd; | |
1048 | u8 bulk_out_ep; | |
1049 | int r; | |
1050 | ||
1051 | /* Find bulk out endpoint */ | |
1052 | endpoint = &iface_desc->endpoint[1].desc; | |
1053 | if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT && | |
1054 | (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
1055 | USB_ENDPOINT_XFER_BULK) { | |
1056 | bulk_out_ep = endpoint->bEndpointAddress; | |
1057 | } else { | |
1058 | dev_err(&udev->dev, | |
1059 | "zd1211rw: Could not find bulk out endpoint\n"); | |
1060 | return -ENODEV; | |
1061 | } | |
1062 | ||
1063 | cmd = kzalloc(31, GFP_KERNEL); | |
1064 | if (cmd == NULL) | |
1065 | return -ENODEV; | |
1066 | ||
1067 | /* USB bulk command block */ | |
1068 | cmd[0] = 0x55; /* bulk command signature */ | |
1069 | cmd[1] = 0x53; /* bulk command signature */ | |
1070 | cmd[2] = 0x42; /* bulk command signature */ | |
1071 | cmd[3] = 0x43; /* bulk command signature */ | |
1072 | cmd[14] = 6; /* command length */ | |
1073 | ||
1074 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
1075 | cmd[19] = 0x2; /* eject disc */ | |
1076 | ||
1077 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
1078 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
1079 | cmd, 31, NULL, 2000); | |
1080 | kfree(cmd); | |
1081 | if (r) | |
1082 | return r; | |
1083 | ||
1084 | /* At this point, the device disconnects and reconnects with the real | |
1085 | * ID numbers. */ | |
1086 | ||
1087 | usb_set_intfdata(intf, NULL); | |
1088 | return 0; | |
1089 | } | |
1090 | ||
74553aed DD |
1091 | int zd_usb_init_hw(struct zd_usb *usb) |
1092 | { | |
1093 | int r; | |
1094 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1095 | ||
1096 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1097 | ||
1098 | r = upload_firmware(usb); | |
1099 | if (r) { | |
1100 | dev_err(zd_usb_dev(usb), | |
1101 | "couldn't load firmware. Error number %d\n", r); | |
1102 | return r; | |
1103 | } | |
1104 | ||
1105 | r = usb_reset_configuration(zd_usb_to_usbdev(usb)); | |
1106 | if (r) { | |
1107 | dev_dbg_f(zd_usb_dev(usb), | |
1108 | "couldn't reset configuration. Error number %d\n", r); | |
1109 | return r; | |
1110 | } | |
1111 | ||
459c51ad | 1112 | r = zd_mac_init_hw(mac->hw); |
74553aed DD |
1113 | if (r) { |
1114 | dev_dbg_f(zd_usb_dev(usb), | |
1115 | "couldn't initialize mac. Error number %d\n", r); | |
1116 | return r; | |
1117 | } | |
1118 | ||
1119 | usb->initialized = 1; | |
1120 | return 0; | |
1121 | } | |
1122 | ||
e85d0918 DD |
1123 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
1124 | { | |
1125 | int r; | |
1126 | struct usb_device *udev = interface_to_usbdev(intf); | |
459c51ad DD |
1127 | struct zd_usb *usb; |
1128 | struct ieee80211_hw *hw = NULL; | |
e85d0918 DD |
1129 | |
1130 | print_id(udev); | |
1131 | ||
a1030e92 DD |
1132 | if (id->driver_info & DEVICE_INSTALLER) |
1133 | return eject_installer(intf); | |
1134 | ||
e85d0918 DD |
1135 | switch (udev->speed) { |
1136 | case USB_SPEED_LOW: | |
1137 | case USB_SPEED_FULL: | |
1138 | case USB_SPEED_HIGH: | |
1139 | break; | |
1140 | default: | |
1141 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
1142 | r = -ENODEV; | |
1143 | goto error; | |
1144 | } | |
1145 | ||
459c51ad DD |
1146 | r = usb_reset_device(udev); |
1147 | if (r) { | |
1148 | dev_err(&intf->dev, | |
1149 | "couldn't reset usb device. Error number %d\n", r); | |
1150 | goto error; | |
1151 | } | |
6e3632f6 | 1152 | |
459c51ad DD |
1153 | hw = zd_mac_alloc_hw(intf); |
1154 | if (hw == NULL) { | |
e85d0918 DD |
1155 | r = -ENOMEM; |
1156 | goto error; | |
1157 | } | |
1158 | ||
459c51ad | 1159 | usb = &zd_hw_mac(hw)->chip.usb; |
74553aed | 1160 | usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
e85d0918 | 1161 | |
459c51ad | 1162 | r = zd_mac_preinit_hw(hw); |
e85d0918 DD |
1163 | if (r) { |
1164 | dev_dbg_f(&intf->dev, | |
1165 | "couldn't initialize mac. Error number %d\n", r); | |
1166 | goto error; | |
1167 | } | |
1168 | ||
459c51ad | 1169 | r = ieee80211_register_hw(hw); |
e85d0918 DD |
1170 | if (r) { |
1171 | dev_dbg_f(&intf->dev, | |
459c51ad | 1172 | "couldn't register device. Error number %d\n", r); |
e85d0918 DD |
1173 | goto error; |
1174 | } | |
1175 | ||
1176 | dev_dbg_f(&intf->dev, "successful\n"); | |
459c51ad | 1177 | dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy)); |
e85d0918 DD |
1178 | return 0; |
1179 | error: | |
1180 | usb_reset_device(interface_to_usbdev(intf)); | |
459c51ad DD |
1181 | if (hw) { |
1182 | zd_mac_clear(zd_hw_mac(hw)); | |
1183 | ieee80211_free_hw(hw); | |
1184 | } | |
e85d0918 DD |
1185 | return r; |
1186 | } | |
1187 | ||
1188 | static void disconnect(struct usb_interface *intf) | |
1189 | { | |
459c51ad | 1190 | struct ieee80211_hw *hw = zd_intf_to_hw(intf); |
e0579d57 MP |
1191 | struct zd_mac *mac; |
1192 | struct zd_usb *usb; | |
e85d0918 | 1193 | |
a1030e92 DD |
1194 | /* Either something really bad happened, or we're just dealing with |
1195 | * a DEVICE_INSTALLER. */ | |
459c51ad | 1196 | if (hw == NULL) |
a1030e92 DD |
1197 | return; |
1198 | ||
459c51ad | 1199 | mac = zd_hw_mac(hw); |
e0579d57 MP |
1200 | usb = &mac->chip.usb; |
1201 | ||
e85d0918 DD |
1202 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1203 | ||
459c51ad | 1204 | ieee80211_unregister_hw(hw); |
e85d0918 DD |
1205 | |
1206 | /* Just in case something has gone wrong! */ | |
1207 | zd_usb_disable_rx(usb); | |
1208 | zd_usb_disable_int(usb); | |
1209 | ||
1210 | /* If the disconnect has been caused by a removal of the | |
1211 | * driver module, the reset allows reloading of the driver. If the | |
1212 | * reset will not be executed here, the upload of the firmware in the | |
1213 | * probe function caused by the reloading of the driver will fail. | |
1214 | */ | |
1215 | usb_reset_device(interface_to_usbdev(intf)); | |
1216 | ||
459c51ad DD |
1217 | zd_mac_clear(mac); |
1218 | ieee80211_free_hw(hw); | |
e85d0918 DD |
1219 | dev_dbg(&intf->dev, "disconnected\n"); |
1220 | } | |
1221 | ||
1222 | static struct usb_driver driver = { | |
459c51ad | 1223 | .name = KBUILD_MODNAME, |
e85d0918 DD |
1224 | .id_table = usb_ids, |
1225 | .probe = probe, | |
1226 | .disconnect = disconnect, | |
1227 | }; | |
1228 | ||
bc5f06a8 UK |
1229 | struct workqueue_struct *zd_workqueue; |
1230 | ||
e85d0918 DD |
1231 | static int __init usb_init(void) |
1232 | { | |
1233 | int r; | |
1234 | ||
741fec53 | 1235 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1236 | |
bc5f06a8 UK |
1237 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1238 | if (zd_workqueue == NULL) { | |
741fec53 | 1239 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1240 | return -ENOMEM; |
1241 | } | |
1242 | ||
e85d0918 DD |
1243 | r = usb_register(&driver); |
1244 | if (r) { | |
192b775c | 1245 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1246 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1247 | driver.name, r); | |
e85d0918 DD |
1248 | return r; |
1249 | } | |
1250 | ||
741fec53 | 1251 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1252 | return 0; |
1253 | } | |
1254 | ||
1255 | static void __exit usb_exit(void) | |
1256 | { | |
741fec53 | 1257 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1258 | usb_deregister(&driver); |
bc5f06a8 | 1259 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1260 | } |
1261 | ||
1262 | module_init(usb_init); | |
1263 | module_exit(usb_exit); | |
1264 | ||
1265 | static int usb_int_regs_length(unsigned int count) | |
1266 | { | |
1267 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1268 | } | |
1269 | ||
1270 | static void prepare_read_regs_int(struct zd_usb *usb) | |
1271 | { | |
1272 | struct zd_usb_interrupt *intr = &usb->intr; | |
1273 | ||
a68077de | 1274 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1275 | intr->read_regs_enabled = 1; |
1276 | INIT_COMPLETION(intr->read_regs.completion); | |
a68077de UK |
1277 | spin_unlock_irq(&intr->lock); |
1278 | } | |
1279 | ||
1280 | static void disable_read_regs_int(struct zd_usb *usb) | |
1281 | { | |
1282 | struct zd_usb_interrupt *intr = &usb->intr; | |
1283 | ||
1284 | spin_lock_irq(&intr->lock); | |
1285 | intr->read_regs_enabled = 0; | |
1286 | spin_unlock_irq(&intr->lock); | |
e85d0918 DD |
1287 | } |
1288 | ||
1289 | static int get_results(struct zd_usb *usb, u16 *values, | |
1290 | struct usb_req_read_regs *req, unsigned int count) | |
1291 | { | |
1292 | int r; | |
1293 | int i; | |
1294 | struct zd_usb_interrupt *intr = &usb->intr; | |
1295 | struct read_regs_int *rr = &intr->read_regs; | |
1296 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1297 | ||
a68077de | 1298 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1299 | |
1300 | r = -EIO; | |
1301 | /* The created block size seems to be larger than expected. | |
1302 | * However results appear to be correct. | |
1303 | */ | |
1304 | if (rr->length < usb_int_regs_length(count)) { | |
1305 | dev_dbg_f(zd_usb_dev(usb), | |
1306 | "error: actual length %d less than expected %d\n", | |
1307 | rr->length, usb_int_regs_length(count)); | |
1308 | goto error_unlock; | |
1309 | } | |
1310 | if (rr->length > sizeof(rr->buffer)) { | |
1311 | dev_dbg_f(zd_usb_dev(usb), | |
1312 | "error: actual length %d exceeds buffer size %zu\n", | |
1313 | rr->length, sizeof(rr->buffer)); | |
1314 | goto error_unlock; | |
1315 | } | |
1316 | ||
1317 | for (i = 0; i < count; i++) { | |
1318 | struct reg_data *rd = ®s->regs[i]; | |
1319 | if (rd->addr != req->addr[i]) { | |
1320 | dev_dbg_f(zd_usb_dev(usb), | |
1321 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1322 | le16_to_cpu(rd->addr), | |
1323 | le16_to_cpu(req->addr[i])); | |
1324 | goto error_unlock; | |
1325 | } | |
1326 | values[i] = le16_to_cpu(rd->value); | |
1327 | } | |
1328 | ||
1329 | r = 0; | |
1330 | error_unlock: | |
a68077de | 1331 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1332 | return r; |
1333 | } | |
1334 | ||
1335 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1336 | const zd_addr_t *addresses, unsigned int count) | |
1337 | { | |
1338 | int r; | |
1339 | int i, req_len, actual_req_len; | |
1340 | struct usb_device *udev; | |
1341 | struct usb_req_read_regs *req = NULL; | |
1342 | unsigned long timeout; | |
1343 | ||
1344 | if (count < 1) { | |
1345 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1346 | return -EINVAL; | |
1347 | } | |
1348 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1349 | dev_dbg_f(zd_usb_dev(usb), | |
1350 | "error: count %u exceeds possible max %u\n", | |
1351 | count, USB_MAX_IOREAD16_COUNT); | |
1352 | return -EINVAL; | |
1353 | } | |
1354 | if (in_atomic()) { | |
1355 | dev_dbg_f(zd_usb_dev(usb), | |
1356 | "error: io in atomic context not supported\n"); | |
1357 | return -EWOULDBLOCK; | |
1358 | } | |
1359 | if (!usb_int_enabled(usb)) { | |
1360 | dev_dbg_f(zd_usb_dev(usb), | |
1361 | "error: usb interrupt not enabled\n"); | |
1362 | return -EWOULDBLOCK; | |
1363 | } | |
1364 | ||
1365 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); | |
35c3404e | 1366 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1367 | if (!req) |
1368 | return -ENOMEM; | |
1369 | req->id = cpu_to_le16(USB_REQ_READ_REGS); | |
1370 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1371 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 DD |
1372 | |
1373 | udev = zd_usb_to_usbdev(usb); | |
1374 | prepare_read_regs_int(usb); | |
1375 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1376 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1377 | if (r) { | |
1378 | dev_dbg_f(zd_usb_dev(usb), | |
1379 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1380 | goto error; | |
1381 | } | |
1382 | if (req_len != actual_req_len) { | |
1383 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n" | |
1384 | " req_len %d != actual_req_len %d\n", | |
1385 | req_len, actual_req_len); | |
1386 | r = -EIO; | |
1387 | goto error; | |
1388 | } | |
1389 | ||
1390 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
1391 | msecs_to_jiffies(1000)); | |
1392 | if (!timeout) { | |
1393 | disable_read_regs_int(usb); | |
1394 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1395 | r = -ETIMEDOUT; | |
1396 | goto error; | |
1397 | } | |
1398 | ||
1399 | r = get_results(usb, values, req, count); | |
1400 | error: | |
1401 | kfree(req); | |
1402 | return r; | |
1403 | } | |
1404 | ||
1405 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, | |
1406 | unsigned int count) | |
1407 | { | |
1408 | int r; | |
1409 | struct usb_device *udev; | |
1410 | struct usb_req_write_regs *req = NULL; | |
1411 | int i, req_len, actual_req_len; | |
1412 | ||
1413 | if (count == 0) | |
1414 | return 0; | |
1415 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1416 | dev_dbg_f(zd_usb_dev(usb), | |
1417 | "error: count %u exceeds possible max %u\n", | |
1418 | count, USB_MAX_IOWRITE16_COUNT); | |
1419 | return -EINVAL; | |
1420 | } | |
1421 | if (in_atomic()) { | |
1422 | dev_dbg_f(zd_usb_dev(usb), | |
1423 | "error: io in atomic context not supported\n"); | |
1424 | return -EWOULDBLOCK; | |
1425 | } | |
1426 | ||
1427 | req_len = sizeof(struct usb_req_write_regs) + | |
1428 | count * sizeof(struct reg_data); | |
35c3404e | 1429 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1430 | if (!req) |
1431 | return -ENOMEM; | |
1432 | ||
1433 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1434 | for (i = 0; i < count; i++) { | |
1435 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1436 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1437 | rw->value = cpu_to_le16(ioreqs[i].value); |
1438 | } | |
1439 | ||
1440 | udev = zd_usb_to_usbdev(usb); | |
1441 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1442 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1443 | if (r) { | |
1444 | dev_dbg_f(zd_usb_dev(usb), | |
1445 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1446 | goto error; | |
1447 | } | |
1448 | if (req_len != actual_req_len) { | |
1449 | dev_dbg_f(zd_usb_dev(usb), | |
1450 | "error in usb_bulk_msg()" | |
1451 | " req_len %d != actual_req_len %d\n", | |
1452 | req_len, actual_req_len); | |
1453 | r = -EIO; | |
1454 | goto error; | |
1455 | } | |
1456 | ||
1457 | /* FALL-THROUGH with r == 0 */ | |
1458 | error: | |
1459 | kfree(req); | |
1460 | return r; | |
1461 | } | |
1462 | ||
1463 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) | |
1464 | { | |
1465 | int r; | |
1466 | struct usb_device *udev; | |
1467 | struct usb_req_rfwrite *req = NULL; | |
1468 | int i, req_len, actual_req_len; | |
1469 | u16 bit_value_template; | |
1470 | ||
1471 | if (in_atomic()) { | |
1472 | dev_dbg_f(zd_usb_dev(usb), | |
1473 | "error: io in atomic context not supported\n"); | |
1474 | return -EWOULDBLOCK; | |
1475 | } | |
1476 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1477 | dev_dbg_f(zd_usb_dev(usb), | |
1478 | "error: bits %d are smaller than" | |
1479 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1480 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1481 | return -EINVAL; | |
1482 | } | |
1483 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1484 | dev_dbg_f(zd_usb_dev(usb), | |
1485 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
1486 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
1487 | return -EINVAL; | |
1488 | } | |
1489 | #ifdef DEBUG | |
1490 | if (value & (~0UL << bits)) { | |
1491 | dev_dbg_f(zd_usb_dev(usb), | |
1492 | "error: value %#09x has bits >= %d set\n", | |
1493 | value, bits); | |
1494 | return -EINVAL; | |
1495 | } | |
1496 | #endif /* DEBUG */ | |
1497 | ||
1498 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
1499 | ||
1500 | r = zd_usb_ioread16(usb, &bit_value_template, CR203); | |
1501 | if (r) { | |
1502 | dev_dbg_f(zd_usb_dev(usb), | |
1503 | "error %d: Couldn't read CR203\n", r); | |
1504 | goto out; | |
1505 | } | |
1506 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
1507 | ||
1508 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); | |
35c3404e | 1509 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1510 | if (!req) |
1511 | return -ENOMEM; | |
1512 | ||
1513 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
1514 | /* 1: 3683a, but not used in ZYDAS driver */ | |
1515 | req->value = cpu_to_le16(2); | |
1516 | req->bits = cpu_to_le16(bits); | |
1517 | ||
1518 | for (i = 0; i < bits; i++) { | |
1519 | u16 bv = bit_value_template; | |
1520 | if (value & (1 << (bits-1-i))) | |
1521 | bv |= RF_DATA; | |
1522 | req->bit_values[i] = cpu_to_le16(bv); | |
1523 | } | |
1524 | ||
1525 | udev = zd_usb_to_usbdev(usb); | |
1526 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1527 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1528 | if (r) { | |
1529 | dev_dbg_f(zd_usb_dev(usb), | |
1530 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1531 | goto out; | |
1532 | } | |
1533 | if (req_len != actual_req_len) { | |
1534 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()" | |
1535 | " req_len %d != actual_req_len %d\n", | |
1536 | req_len, actual_req_len); | |
1537 | r = -EIO; | |
1538 | goto out; | |
1539 | } | |
1540 | ||
1541 | /* FALL-THROUGH with r == 0 */ | |
1542 | out: | |
1543 | kfree(req); | |
1544 | return r; | |
1545 | } |