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 | |
f47cdae4 | 18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
e85d0918 DD |
19 | */ |
20 | ||
d066c219 | 21 | #include <linux/kernel.h> |
e85d0918 | 22 | #include <linux/init.h> |
e85d0918 DD |
23 | #include <linux/firmware.h> |
24 | #include <linux/device.h> | |
25 | #include <linux/errno.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
e85d0918 DD |
27 | #include <linux/skbuff.h> |
28 | #include <linux/usb.h> | |
bc5f06a8 | 29 | #include <linux/workqueue.h> |
9d9779e7 | 30 | #include <linux/module.h> |
459c51ad | 31 | #include <net/mac80211.h> |
c248725b | 32 | #include <asm/unaligned.h> |
e85d0918 DD |
33 | |
34 | #include "zd_def.h" | |
e85d0918 DD |
35 | #include "zd_mac.h" |
36 | #include "zd_usb.h" | |
e85d0918 DD |
37 | |
38 | static struct usb_device_id usb_ids[] = { | |
39 | /* ZD1211 */ | |
3bfbe80e HTL |
40 | { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 }, |
41 | { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 }, | |
42 | { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 }, | |
43 | { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 }, | |
44 | { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 }, | |
45 | { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 }, | |
46 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 47 | { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 }, |
14990c69 | 48 | { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
49 | { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 }, |
50 | { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 }, | |
51 | { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 52 | { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 }, |
aa1d3a18 | 53 | { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
54 | { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 }, |
55 | { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 }, | |
56 | { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 }, | |
f2423723 | 57 | { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 }, |
8cecc90e | 58 | { USB_DEVICE(0x14ea, 0xab10), .driver_info = DEVICE_ZD1211 }, |
229782a3 | 59 | { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 }, |
269fca0e | 60 | { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
61 | { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 }, |
62 | { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 }, | |
9011cd25 | 63 | { USB_DEVICE(0x157e, 0x3207), .driver_info = DEVICE_ZD1211 }, |
3bfbe80e HTL |
64 | { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, |
65 | { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 66 | /* ZD1211B */ |
3bfbe80e | 67 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
ad580db5 | 68 | { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
69 | { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
70 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
71 | { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B }, | |
72 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, | |
8b339d05 | 73 | { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
74 | { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B }, |
75 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, | |
76 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
77 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, | |
78 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, | |
dd2f5538 | 79 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
80 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B }, |
81 | { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B }, | |
82 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, | |
8f75e07a | 83 | { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B }, |
f72151fb | 84 | { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B }, |
9dfd5500 | 85 | { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
86 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, |
87 | { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B }, | |
aec91028 | 88 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
c445a31c | 89 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
8e97afe5 | 90 | { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
de262496 | 91 | { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
92 | { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
93 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, | |
94 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, | |
95 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, | |
96 | { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, | |
8cecc90e | 97 | { USB_DEVICE(0x2019, 0xed01), .driver_info = DEVICE_ZD1211B }, |
a1030e92 DD |
98 | /* "Driverless" devices that need ejecting */ |
99 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 100 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
101 | {} |
102 | }; | |
103 | ||
104 | MODULE_LICENSE("GPL"); | |
105 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
106 | MODULE_AUTHOR("Ulrich Kunitz"); | |
107 | MODULE_AUTHOR("Daniel Drake"); | |
108 | MODULE_VERSION("1.0"); | |
109 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
110 | ||
111 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
112 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
113 | ||
c900eff3 JK |
114 | static bool check_read_regs(struct zd_usb *usb, struct usb_req_read_regs *req, |
115 | unsigned int count); | |
116 | ||
e85d0918 | 117 | /* USB device initialization */ |
72e77a8a | 118 | static void int_urb_complete(struct urb *urb); |
e85d0918 DD |
119 | |
120 | static int request_fw_file( | |
121 | const struct firmware **fw, const char *name, struct device *device) | |
122 | { | |
123 | int r; | |
124 | ||
125 | dev_dbg_f(device, "fw name %s\n", name); | |
126 | ||
127 | r = request_firmware(fw, name, device); | |
128 | if (r) | |
129 | dev_err(device, | |
130 | "Could not load firmware file %s. Error number %d\n", | |
131 | name, r); | |
132 | return r; | |
133 | } | |
134 | ||
135 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
136 | { | |
137 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
138 | } | |
139 | ||
140 | enum upload_code_flags { | |
141 | REBOOT = 1, | |
142 | }; | |
143 | ||
144 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
145 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
146 | ||
147 | static int upload_code(struct usb_device *udev, | |
148 | const u8 *data, size_t size, u16 code_offset, int flags) | |
149 | { | |
150 | u8 *p; | |
151 | int r; | |
152 | ||
153 | /* USB request blocks need "kmalloced" buffers. | |
154 | */ | |
155 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
156 | if (!p) { | |
e85d0918 DD |
157 | r = -ENOMEM; |
158 | goto error; | |
159 | } | |
160 | ||
161 | size &= ~1; | |
162 | while (size > 0) { | |
163 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
164 | size : MAX_TRANSFER_SIZE; | |
165 | ||
166 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
167 | ||
168 | memcpy(p, data, transfer_size); | |
169 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
170 | USB_REQ_FIRMWARE_DOWNLOAD, | |
171 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
172 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
173 | if (r < 0) { | |
174 | dev_err(&udev->dev, | |
175 | "USB control request for firmware upload" | |
176 | " failed. Error number %d\n", r); | |
177 | goto error; | |
178 | } | |
179 | transfer_size = r & ~1; | |
180 | ||
181 | size -= transfer_size; | |
182 | data += transfer_size; | |
183 | code_offset += transfer_size/sizeof(u16); | |
184 | } | |
185 | ||
186 | if (flags & REBOOT) { | |
187 | u8 ret; | |
188 | ||
a8c4ea7a | 189 | /* Use "DMA-aware" buffer. */ |
e85d0918 DD |
190 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
191 | USB_REQ_FIRMWARE_CONFIRM, | |
192 | USB_DIR_IN | USB_TYPE_VENDOR, | |
a8c4ea7a | 193 | 0, 0, p, sizeof(ret), 5000 /* ms */); |
e85d0918 DD |
194 | if (r != sizeof(ret)) { |
195 | dev_err(&udev->dev, | |
b46b5993 | 196 | "control request firmware confirmation failed." |
e85d0918 DD |
197 | " Return value %d\n", r); |
198 | if (r >= 0) | |
199 | r = -ENODEV; | |
200 | goto error; | |
201 | } | |
a8c4ea7a | 202 | ret = p[0]; |
e85d0918 DD |
203 | if (ret & 0x80) { |
204 | dev_err(&udev->dev, | |
205 | "Internal error while downloading." | |
206 | " Firmware confirm return value %#04x\n", | |
207 | (unsigned int)ret); | |
208 | r = -ENODEV; | |
209 | goto error; | |
210 | } | |
211 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
212 | (unsigned int)ret); | |
213 | } | |
214 | ||
215 | r = 0; | |
216 | error: | |
217 | kfree(p); | |
218 | return r; | |
219 | } | |
220 | ||
221 | static u16 get_word(const void *data, u16 offset) | |
222 | { | |
223 | const __le16 *p = data; | |
224 | return le16_to_cpu(p[offset]); | |
225 | } | |
226 | ||
74553aed | 227 | static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
e85d0918 DD |
228 | const char* postfix) |
229 | { | |
230 | scnprintf(buffer, size, "%s%s", | |
74553aed | 231 | usb->is_zd1211b ? |
e85d0918 DD |
232 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
233 | postfix); | |
234 | return buffer; | |
235 | } | |
236 | ||
74553aed | 237 | static int handle_version_mismatch(struct zd_usb *usb, |
d066c219 DD |
238 | const struct firmware *ub_fw) |
239 | { | |
74553aed | 240 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
d066c219 DD |
241 | const struct firmware *ur_fw = NULL; |
242 | int offset; | |
243 | int r = 0; | |
244 | char fw_name[128]; | |
245 | ||
246 | r = request_fw_file(&ur_fw, | |
74553aed | 247 | get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
d066c219 DD |
248 | &udev->dev); |
249 | if (r) | |
250 | goto error; | |
251 | ||
ee302767 | 252 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
253 | if (r) |
254 | goto error; | |
255 | ||
ee302767 | 256 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 257 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 258 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
259 | |
260 | /* At this point, the vendor driver downloads the whole firmware | |
261 | * image, hacks around with version IDs, and uploads it again, | |
262 | * completely overwriting the boot code. We do not do this here as | |
263 | * it is not required on any tested devices, and it is suspected to | |
264 | * cause problems. */ | |
265 | error: | |
266 | release_firmware(ur_fw); | |
267 | return r; | |
268 | } | |
269 | ||
74553aed | 270 | static int upload_firmware(struct zd_usb *usb) |
e85d0918 DD |
271 | { |
272 | int r; | |
273 | u16 fw_bcdDevice; | |
274 | u16 bcdDevice; | |
74553aed | 275 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
276 | const struct firmware *ub_fw = NULL; |
277 | const struct firmware *uph_fw = NULL; | |
278 | char fw_name[128]; | |
279 | ||
280 | bcdDevice = get_bcdDevice(udev); | |
281 | ||
282 | r = request_fw_file(&ub_fw, | |
74553aed | 283 | get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
e85d0918 DD |
284 | &udev->dev); |
285 | if (r) | |
286 | goto error; | |
287 | ||
ee302767 | 288 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 289 | |
e85d0918 DD |
290 | if (fw_bcdDevice != bcdDevice) { |
291 | dev_info(&udev->dev, | |
d066c219 DD |
292 | "firmware version %#06x and device bootcode version " |
293 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
294 | if (bcdDevice <= 0x4313) | |
295 | dev_warn(&udev->dev, "device has old bootcode, please " | |
296 | "report success or failure\n"); | |
297 | ||
74553aed | 298 | r = handle_version_mismatch(usb, ub_fw); |
d066c219 DD |
299 | if (r) |
300 | goto error; | |
e85d0918 DD |
301 | } else { |
302 | dev_dbg_f(&udev->dev, | |
303 | "firmware device id %#06x is equal to the " | |
304 | "actual device id\n", fw_bcdDevice); | |
305 | } | |
306 | ||
307 | ||
308 | r = request_fw_file(&uph_fw, | |
74553aed | 309 | get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
e85d0918 DD |
310 | &udev->dev); |
311 | if (r) | |
312 | goto error; | |
313 | ||
ee302767 | 314 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
315 | if (r) { |
316 | dev_err(&udev->dev, | |
317 | "Could not upload firmware code uph. Error number %d\n", | |
318 | r); | |
319 | } | |
320 | ||
321 | /* FALL-THROUGH */ | |
322 | error: | |
323 | release_firmware(ub_fw); | |
324 | release_firmware(uph_fw); | |
325 | return r; | |
326 | } | |
327 | ||
3e8b4d00 BH |
328 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur"); |
329 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur"); | |
330 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub"); | |
331 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub"); | |
332 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr"); | |
333 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr"); | |
334 | ||
74553aed DD |
335 | /* Read data from device address space using "firmware interface" which does |
336 | * not require firmware to be loaded. */ | |
337 | int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) | |
338 | { | |
339 | int r; | |
340 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
a8c4ea7a | 341 | u8 *buf; |
74553aed | 342 | |
a8c4ea7a AN |
343 | /* Use "DMA-aware" buffer. */ |
344 | buf = kmalloc(len, GFP_KERNEL); | |
345 | if (!buf) | |
346 | return -ENOMEM; | |
74553aed DD |
347 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
348 | USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, | |
a8c4ea7a | 349 | buf, len, 5000); |
74553aed DD |
350 | if (r < 0) { |
351 | dev_err(&udev->dev, | |
352 | "read over firmware interface failed: %d\n", r); | |
a8c4ea7a | 353 | goto exit; |
74553aed DD |
354 | } else if (r != len) { |
355 | dev_err(&udev->dev, | |
356 | "incomplete read over firmware interface: %d/%d\n", | |
357 | r, len); | |
a8c4ea7a AN |
358 | r = -EIO; |
359 | goto exit; | |
74553aed | 360 | } |
a8c4ea7a AN |
361 | r = 0; |
362 | memcpy(data, buf, len); | |
363 | exit: | |
364 | kfree(buf); | |
365 | return r; | |
74553aed DD |
366 | } |
367 | ||
e85d0918 DD |
368 | #define urb_dev(urb) (&(urb)->dev->dev) |
369 | ||
c900eff3 JK |
370 | static inline void handle_regs_int_override(struct urb *urb) |
371 | { | |
372 | struct zd_usb *usb = urb->context; | |
373 | struct zd_usb_interrupt *intr = &usb->intr; | |
374 | ||
375 | spin_lock(&intr->lock); | |
376 | if (atomic_read(&intr->read_regs_enabled)) { | |
377 | atomic_set(&intr->read_regs_enabled, 0); | |
378 | intr->read_regs_int_overridden = 1; | |
379 | complete(&intr->read_regs.completion); | |
380 | } | |
381 | spin_unlock(&intr->lock); | |
382 | } | |
383 | ||
e85d0918 DD |
384 | static inline void handle_regs_int(struct urb *urb) |
385 | { | |
386 | struct zd_usb *usb = urb->context; | |
387 | struct zd_usb_interrupt *intr = &usb->intr; | |
388 | int len; | |
72e77a8a | 389 | u16 int_num; |
e85d0918 DD |
390 | |
391 | ZD_ASSERT(in_interrupt()); | |
392 | spin_lock(&intr->lock); | |
393 | ||
d63ddcec | 394 | int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); |
72e77a8a LCC |
395 | if (int_num == CR_INTERRUPT) { |
396 | struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); | |
8b17f75c | 397 | spin_lock(&mac->lock); |
72e77a8a LCC |
398 | memcpy(&mac->intr_buffer, urb->transfer_buffer, |
399 | USB_MAX_EP_INT_BUFFER); | |
8b17f75c | 400 | spin_unlock(&mac->lock); |
72e77a8a | 401 | schedule_work(&mac->process_intr); |
c900eff3 JK |
402 | } else if (atomic_read(&intr->read_regs_enabled)) { |
403 | len = urb->actual_length; | |
404 | intr->read_regs.length = urb->actual_length; | |
e85d0918 DD |
405 | if (len > sizeof(intr->read_regs.buffer)) |
406 | len = sizeof(intr->read_regs.buffer); | |
c900eff3 | 407 | |
e85d0918 | 408 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); |
c900eff3 JK |
409 | |
410 | /* Sometimes USB_INT_ID_REGS is not overridden, but comes after | |
411 | * USB_INT_ID_RETRY_FAILED. Read-reg retry then gets this | |
412 | * delayed USB_INT_ID_REGS, but leaves USB_INT_ID_REGS of | |
413 | * retry unhandled. Next read-reg command then might catch | |
414 | * this wrong USB_INT_ID_REGS. Fix by ignoring wrong reads. | |
415 | */ | |
416 | if (!check_read_regs(usb, intr->read_regs.req, | |
417 | intr->read_regs.req_count)) | |
418 | goto out; | |
419 | ||
420 | atomic_set(&intr->read_regs_enabled, 0); | |
421 | intr->read_regs_int_overridden = 0; | |
e85d0918 | 422 | complete(&intr->read_regs.completion); |
c900eff3 | 423 | |
e85d0918 DD |
424 | goto out; |
425 | } | |
426 | ||
e85d0918 DD |
427 | out: |
428 | spin_unlock(&intr->lock); | |
c900eff3 JK |
429 | |
430 | /* CR_INTERRUPT might override read_reg too. */ | |
431 | if (int_num == CR_INTERRUPT && atomic_read(&intr->read_regs_enabled)) | |
432 | handle_regs_int_override(urb); | |
e85d0918 DD |
433 | } |
434 | ||
7d12e780 | 435 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
436 | { |
437 | int r; | |
438 | struct usb_int_header *hdr; | |
c900eff3 JK |
439 | struct zd_usb *usb; |
440 | struct zd_usb_interrupt *intr; | |
e85d0918 DD |
441 | |
442 | switch (urb->status) { | |
443 | case 0: | |
444 | break; | |
445 | case -ESHUTDOWN: | |
446 | case -EINVAL: | |
447 | case -ENODEV: | |
448 | case -ENOENT: | |
449 | case -ECONNRESET: | |
e85d0918 | 450 | case -EPIPE: |
24d24c62 | 451 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
4a3b0874 | 452 | return; |
e85d0918 | 453 | default: |
24d24c62 | 454 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
e85d0918 DD |
455 | goto resubmit; |
456 | } | |
457 | ||
458 | if (urb->actual_length < sizeof(hdr)) { | |
459 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
460 | goto resubmit; | |
461 | } | |
462 | ||
463 | hdr = urb->transfer_buffer; | |
464 | if (hdr->type != USB_INT_TYPE) { | |
465 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
466 | goto resubmit; | |
467 | } | |
468 | ||
c900eff3 JK |
469 | /* USB_INT_ID_RETRY_FAILED triggered by tx-urb submit can override |
470 | * pending USB_INT_ID_REGS causing read command timeout. | |
471 | */ | |
472 | usb = urb->context; | |
473 | intr = &usb->intr; | |
474 | if (hdr->id != USB_INT_ID_REGS && atomic_read(&intr->read_regs_enabled)) | |
475 | handle_regs_int_override(urb); | |
476 | ||
e85d0918 DD |
477 | switch (hdr->id) { |
478 | case USB_INT_ID_REGS: | |
479 | handle_regs_int(urb); | |
480 | break; | |
481 | case USB_INT_ID_RETRY_FAILED: | |
7f4013f0 | 482 | zd_mac_tx_failed(urb); |
e85d0918 DD |
483 | break; |
484 | default: | |
485 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
486 | (unsigned int)hdr->id); | |
487 | goto resubmit; | |
488 | } | |
489 | ||
490 | resubmit: | |
491 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
492 | if (r) { | |
4a3b0874 JK |
493 | dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n", |
494 | urb, r); | |
495 | /* TODO: add worker to reset intr->urb */ | |
e85d0918 DD |
496 | } |
497 | return; | |
e85d0918 DD |
498 | } |
499 | ||
500 | static inline int int_urb_interval(struct usb_device *udev) | |
501 | { | |
502 | switch (udev->speed) { | |
503 | case USB_SPEED_HIGH: | |
504 | return 4; | |
505 | case USB_SPEED_LOW: | |
506 | return 10; | |
507 | case USB_SPEED_FULL: | |
508 | default: | |
509 | return 1; | |
510 | } | |
511 | } | |
512 | ||
513 | static inline int usb_int_enabled(struct zd_usb *usb) | |
514 | { | |
515 | unsigned long flags; | |
516 | struct zd_usb_interrupt *intr = &usb->intr; | |
517 | struct urb *urb; | |
518 | ||
519 | spin_lock_irqsave(&intr->lock, flags); | |
520 | urb = intr->urb; | |
521 | spin_unlock_irqrestore(&intr->lock, flags); | |
522 | return urb != NULL; | |
523 | } | |
524 | ||
525 | int zd_usb_enable_int(struct zd_usb *usb) | |
526 | { | |
527 | int r; | |
4a3b0874 | 528 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 | 529 | struct zd_usb_interrupt *intr = &usb->intr; |
e85d0918 DD |
530 | struct urb *urb; |
531 | ||
532 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
533 | ||
35c3404e | 534 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
535 | if (!urb) { |
536 | r = -ENOMEM; | |
537 | goto out; | |
538 | } | |
539 | ||
540 | ZD_ASSERT(!irqs_disabled()); | |
541 | spin_lock_irq(&intr->lock); | |
542 | if (intr->urb) { | |
543 | spin_unlock_irq(&intr->lock); | |
544 | r = 0; | |
545 | goto error_free_urb; | |
546 | } | |
547 | intr->urb = urb; | |
548 | spin_unlock_irq(&intr->lock); | |
549 | ||
e85d0918 | 550 | r = -ENOMEM; |
4a3b0874 JK |
551 | intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER, |
552 | GFP_KERNEL, &intr->buffer_dma); | |
553 | if (!intr->buffer) { | |
e85d0918 DD |
554 | dev_dbg_f(zd_usb_dev(usb), |
555 | "couldn't allocate transfer_buffer\n"); | |
556 | goto error_set_urb_null; | |
557 | } | |
558 | ||
e85d0918 | 559 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), |
4a3b0874 | 560 | intr->buffer, USB_MAX_EP_INT_BUFFER, |
e85d0918 DD |
561 | int_urb_complete, usb, |
562 | intr->interval); | |
4a3b0874 JK |
563 | urb->transfer_dma = intr->buffer_dma; |
564 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
e85d0918 DD |
565 | |
566 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 567 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
568 | if (r) { |
569 | dev_dbg_f(zd_usb_dev(usb), | |
570 | "Couldn't submit urb. Error number %d\n", r); | |
571 | goto error; | |
572 | } | |
573 | ||
574 | return 0; | |
575 | error: | |
4a3b0874 JK |
576 | usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER, |
577 | intr->buffer, intr->buffer_dma); | |
e85d0918 DD |
578 | error_set_urb_null: |
579 | spin_lock_irq(&intr->lock); | |
580 | intr->urb = NULL; | |
581 | spin_unlock_irq(&intr->lock); | |
582 | error_free_urb: | |
583 | usb_free_urb(urb); | |
584 | out: | |
585 | return r; | |
586 | } | |
587 | ||
588 | void zd_usb_disable_int(struct zd_usb *usb) | |
589 | { | |
590 | unsigned long flags; | |
4a3b0874 | 591 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
592 | struct zd_usb_interrupt *intr = &usb->intr; |
593 | struct urb *urb; | |
4a3b0874 JK |
594 | void *buffer; |
595 | dma_addr_t buffer_dma; | |
e85d0918 DD |
596 | |
597 | spin_lock_irqsave(&intr->lock, flags); | |
598 | urb = intr->urb; | |
599 | if (!urb) { | |
600 | spin_unlock_irqrestore(&intr->lock, flags); | |
601 | return; | |
602 | } | |
603 | intr->urb = NULL; | |
4a3b0874 JK |
604 | buffer = intr->buffer; |
605 | buffer_dma = intr->buffer_dma; | |
606 | intr->buffer = NULL; | |
e85d0918 DD |
607 | spin_unlock_irqrestore(&intr->lock, flags); |
608 | ||
609 | usb_kill_urb(urb); | |
610 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
611 | usb_free_urb(urb); | |
4a3b0874 JK |
612 | |
613 | if (buffer) | |
614 | usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER, | |
615 | buffer, buffer_dma); | |
e85d0918 DD |
616 | } |
617 | ||
618 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
619 | unsigned int length) | |
620 | { | |
621 | int i; | |
e85d0918 DD |
622 | const struct rx_length_info *length_info; |
623 | ||
624 | if (length < sizeof(struct rx_length_info)) { | |
625 | /* It's not a complete packet anyhow. */ | |
b405e1b8 JK |
626 | dev_dbg_f(zd_usb_dev(usb), "invalid, small RX packet : %d\n", |
627 | length); | |
e85d0918 DD |
628 | return; |
629 | } | |
630 | length_info = (struct rx_length_info *) | |
631 | (buffer + length - sizeof(struct rx_length_info)); | |
632 | ||
633 | /* It might be that three frames are merged into a single URB | |
634 | * transaction. We have to check for the length info tag. | |
635 | * | |
636 | * While testing we discovered that length_info might be unaligned, | |
637 | * because if USB transactions are merged, the last packet will not | |
638 | * be padded. Unaligned access might also happen if the length_info | |
639 | * structure is not present. | |
640 | */ | |
533dd1b0 | 641 | if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG) |
b269825b | 642 | { |
e85d0918 DD |
643 | unsigned int l, k, n; |
644 | for (i = 0, l = 0;; i++) { | |
533dd1b0 | 645 | k = get_unaligned_le16(&length_info->length[i]); |
850c211c UK |
646 | if (k == 0) |
647 | return; | |
e85d0918 DD |
648 | n = l+k; |
649 | if (n > length) | |
650 | return; | |
459c51ad | 651 | zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k); |
e85d0918 DD |
652 | if (i >= 2) |
653 | return; | |
654 | l = (n+3) & ~3; | |
655 | } | |
656 | } else { | |
459c51ad | 657 | zd_mac_rx(zd_usb_to_hw(usb), buffer, length); |
e85d0918 DD |
658 | } |
659 | } | |
660 | ||
7d12e780 | 661 | static void rx_urb_complete(struct urb *urb) |
e85d0918 | 662 | { |
24d24c62 | 663 | int r; |
e85d0918 DD |
664 | struct zd_usb *usb; |
665 | struct zd_usb_rx *rx; | |
666 | const u8 *buffer; | |
667 | unsigned int length; | |
668 | ||
669 | switch (urb->status) { | |
670 | case 0: | |
671 | break; | |
672 | case -ESHUTDOWN: | |
673 | case -EINVAL: | |
674 | case -ENODEV: | |
675 | case -ENOENT: | |
676 | case -ECONNRESET: | |
e85d0918 | 677 | case -EPIPE: |
24d24c62 | 678 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
b312d799 | 679 | return; |
e85d0918 DD |
680 | default: |
681 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
682 | goto resubmit; | |
683 | } | |
684 | ||
685 | buffer = urb->transfer_buffer; | |
686 | length = urb->actual_length; | |
687 | usb = urb->context; | |
688 | rx = &usb->rx; | |
689 | ||
02353573 | 690 | tasklet_schedule(&rx->reset_timer_tasklet); |
1f6ccccc | 691 | |
e85d0918 DD |
692 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { |
693 | /* If there is an old first fragment, we don't care. */ | |
694 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
695 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
696 | spin_lock(&rx->lock); | |
697 | memcpy(rx->fragment, buffer, length); | |
698 | rx->fragment_length = length; | |
699 | spin_unlock(&rx->lock); | |
700 | goto resubmit; | |
701 | } | |
702 | ||
703 | spin_lock(&rx->lock); | |
704 | if (rx->fragment_length > 0) { | |
705 | /* We are on a second fragment, we believe */ | |
706 | ZD_ASSERT(length + rx->fragment_length <= | |
707 | ARRAY_SIZE(rx->fragment)); | |
708 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
709 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
710 | handle_rx_packet(usb, rx->fragment, | |
711 | rx->fragment_length + length); | |
712 | rx->fragment_length = 0; | |
713 | spin_unlock(&rx->lock); | |
714 | } else { | |
715 | spin_unlock(&rx->lock); | |
716 | handle_rx_packet(usb, buffer, length); | |
717 | } | |
718 | ||
719 | resubmit: | |
24d24c62 JK |
720 | r = usb_submit_urb(urb, GFP_ATOMIC); |
721 | if (r) | |
722 | dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r); | |
e85d0918 DD |
723 | } |
724 | ||
459c51ad | 725 | static struct urb *alloc_rx_urb(struct zd_usb *usb) |
e85d0918 DD |
726 | { |
727 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
728 | struct urb *urb; | |
729 | void *buffer; | |
730 | ||
35c3404e | 731 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
732 | if (!urb) |
733 | return NULL; | |
997ea58e DM |
734 | buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
735 | &urb->transfer_dma); | |
e85d0918 DD |
736 | if (!buffer) { |
737 | usb_free_urb(urb); | |
738 | return NULL; | |
739 | } | |
740 | ||
741 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
997ea58e | 742 | buffer, USB_MAX_RX_SIZE, |
e85d0918 DD |
743 | rx_urb_complete, usb); |
744 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
745 | ||
746 | return urb; | |
747 | } | |
748 | ||
459c51ad | 749 | static void free_rx_urb(struct urb *urb) |
e85d0918 DD |
750 | { |
751 | if (!urb) | |
752 | return; | |
997ea58e DM |
753 | usb_free_coherent(urb->dev, urb->transfer_buffer_length, |
754 | urb->transfer_buffer, urb->transfer_dma); | |
e85d0918 DD |
755 | usb_free_urb(urb); |
756 | } | |
757 | ||
1f6ccccc | 758 | static int __zd_usb_enable_rx(struct zd_usb *usb) |
e85d0918 DD |
759 | { |
760 | int i, r; | |
761 | struct zd_usb_rx *rx = &usb->rx; | |
762 | struct urb **urbs; | |
763 | ||
764 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
765 | ||
766 | r = -ENOMEM; | |
459c51ad | 767 | urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
768 | if (!urbs) |
769 | goto error; | |
459c51ad DD |
770 | for (i = 0; i < RX_URBS_COUNT; i++) { |
771 | urbs[i] = alloc_rx_urb(usb); | |
e85d0918 DD |
772 | if (!urbs[i]) |
773 | goto error; | |
774 | } | |
775 | ||
776 | ZD_ASSERT(!irqs_disabled()); | |
777 | spin_lock_irq(&rx->lock); | |
778 | if (rx->urbs) { | |
779 | spin_unlock_irq(&rx->lock); | |
780 | r = 0; | |
781 | goto error; | |
782 | } | |
783 | rx->urbs = urbs; | |
459c51ad | 784 | rx->urbs_count = RX_URBS_COUNT; |
e85d0918 DD |
785 | spin_unlock_irq(&rx->lock); |
786 | ||
459c51ad | 787 | for (i = 0; i < RX_URBS_COUNT; i++) { |
35c3404e | 788 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
789 | if (r) |
790 | goto error_submit; | |
791 | } | |
792 | ||
793 | return 0; | |
794 | error_submit: | |
459c51ad | 795 | for (i = 0; i < RX_URBS_COUNT; i++) { |
e85d0918 DD |
796 | usb_kill_urb(urbs[i]); |
797 | } | |
798 | spin_lock_irq(&rx->lock); | |
799 | rx->urbs = NULL; | |
800 | rx->urbs_count = 0; | |
801 | spin_unlock_irq(&rx->lock); | |
802 | error: | |
803 | if (urbs) { | |
459c51ad DD |
804 | for (i = 0; i < RX_URBS_COUNT; i++) |
805 | free_rx_urb(urbs[i]); | |
e85d0918 DD |
806 | } |
807 | return r; | |
808 | } | |
809 | ||
1f6ccccc JK |
810 | int zd_usb_enable_rx(struct zd_usb *usb) |
811 | { | |
812 | int r; | |
813 | struct zd_usb_rx *rx = &usb->rx; | |
814 | ||
815 | mutex_lock(&rx->setup_mutex); | |
816 | r = __zd_usb_enable_rx(usb); | |
817 | mutex_unlock(&rx->setup_mutex); | |
818 | ||
819 | zd_usb_reset_rx_idle_timer(usb); | |
820 | ||
821 | return r; | |
822 | } | |
823 | ||
824 | static void __zd_usb_disable_rx(struct zd_usb *usb) | |
e85d0918 DD |
825 | { |
826 | int i; | |
827 | unsigned long flags; | |
828 | struct urb **urbs; | |
829 | unsigned int count; | |
830 | struct zd_usb_rx *rx = &usb->rx; | |
831 | ||
832 | spin_lock_irqsave(&rx->lock, flags); | |
833 | urbs = rx->urbs; | |
834 | count = rx->urbs_count; | |
835 | spin_unlock_irqrestore(&rx->lock, flags); | |
836 | if (!urbs) | |
837 | return; | |
838 | ||
839 | for (i = 0; i < count; i++) { | |
840 | usb_kill_urb(urbs[i]); | |
459c51ad | 841 | free_rx_urb(urbs[i]); |
e85d0918 DD |
842 | } |
843 | kfree(urbs); | |
844 | ||
845 | spin_lock_irqsave(&rx->lock, flags); | |
846 | rx->urbs = NULL; | |
847 | rx->urbs_count = 0; | |
848 | spin_unlock_irqrestore(&rx->lock, flags); | |
849 | } | |
850 | ||
1f6ccccc JK |
851 | void zd_usb_disable_rx(struct zd_usb *usb) |
852 | { | |
853 | struct zd_usb_rx *rx = &usb->rx; | |
854 | ||
855 | mutex_lock(&rx->setup_mutex); | |
856 | __zd_usb_disable_rx(usb); | |
857 | mutex_unlock(&rx->setup_mutex); | |
858 | ||
02353573 | 859 | tasklet_kill(&rx->reset_timer_tasklet); |
1f6ccccc JK |
860 | cancel_delayed_work_sync(&rx->idle_work); |
861 | } | |
862 | ||
863 | static void zd_usb_reset_rx(struct zd_usb *usb) | |
864 | { | |
865 | bool do_reset; | |
866 | struct zd_usb_rx *rx = &usb->rx; | |
867 | unsigned long flags; | |
868 | ||
869 | mutex_lock(&rx->setup_mutex); | |
870 | ||
871 | spin_lock_irqsave(&rx->lock, flags); | |
872 | do_reset = rx->urbs != NULL; | |
873 | spin_unlock_irqrestore(&rx->lock, flags); | |
874 | ||
875 | if (do_reset) { | |
876 | __zd_usb_disable_rx(usb); | |
877 | __zd_usb_enable_rx(usb); | |
878 | } | |
879 | ||
880 | mutex_unlock(&rx->setup_mutex); | |
881 | ||
882 | if (do_reset) | |
883 | zd_usb_reset_rx_idle_timer(usb); | |
884 | } | |
885 | ||
459c51ad DD |
886 | /** |
887 | * zd_usb_disable_tx - disable transmission | |
888 | * @usb: the zd1211rw-private USB structure | |
889 | * | |
890 | * Frees all URBs in the free list and marks the transmission as disabled. | |
891 | */ | |
892 | void zd_usb_disable_tx(struct zd_usb *usb) | |
893 | { | |
894 | struct zd_usb_tx *tx = &usb->tx; | |
895 | unsigned long flags; | |
78fc800f JK |
896 | |
897 | atomic_set(&tx->enabled, 0); | |
898 | ||
899 | /* kill all submitted tx-urbs */ | |
900 | usb_kill_anchored_urbs(&tx->submitted); | |
459c51ad DD |
901 | |
902 | spin_lock_irqsave(&tx->lock, flags); | |
a0fd751f | 903 | WARN_ON(!skb_queue_empty(&tx->submitted_skbs)); |
78fc800f | 904 | WARN_ON(tx->submitted_urbs != 0); |
459c51ad | 905 | tx->submitted_urbs = 0; |
78fc800f JK |
906 | spin_unlock_irqrestore(&tx->lock, flags); |
907 | ||
459c51ad DD |
908 | /* The stopped state is ignored, relying on ieee80211_wake_queues() |
909 | * in a potentionally following zd_usb_enable_tx(). | |
910 | */ | |
459c51ad DD |
911 | } |
912 | ||
913 | /** | |
914 | * zd_usb_enable_tx - enables transmission | |
915 | * @usb: a &struct zd_usb pointer | |
916 | * | |
917 | * This function enables transmission and prepares the &zd_usb_tx data | |
918 | * structure. | |
919 | */ | |
920 | void zd_usb_enable_tx(struct zd_usb *usb) | |
921 | { | |
922 | unsigned long flags; | |
923 | struct zd_usb_tx *tx = &usb->tx; | |
924 | ||
925 | spin_lock_irqsave(&tx->lock, flags); | |
78fc800f | 926 | atomic_set(&tx->enabled, 1); |
459c51ad DD |
927 | tx->submitted_urbs = 0; |
928 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
929 | tx->stopped = 0; | |
930 | spin_unlock_irqrestore(&tx->lock, flags); | |
931 | } | |
932 | ||
459c51ad DD |
933 | static void tx_dec_submitted_urbs(struct zd_usb *usb) |
934 | { | |
935 | struct zd_usb_tx *tx = &usb->tx; | |
936 | unsigned long flags; | |
937 | ||
938 | spin_lock_irqsave(&tx->lock, flags); | |
939 | --tx->submitted_urbs; | |
940 | if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) { | |
941 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
942 | tx->stopped = 0; | |
943 | } | |
944 | spin_unlock_irqrestore(&tx->lock, flags); | |
945 | } | |
946 | ||
947 | static void tx_inc_submitted_urbs(struct zd_usb *usb) | |
948 | { | |
949 | struct zd_usb_tx *tx = &usb->tx; | |
950 | unsigned long flags; | |
951 | ||
952 | spin_lock_irqsave(&tx->lock, flags); | |
953 | ++tx->submitted_urbs; | |
954 | if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) { | |
955 | ieee80211_stop_queues(zd_usb_to_hw(usb)); | |
956 | tx->stopped = 1; | |
957 | } | |
958 | spin_unlock_irqrestore(&tx->lock, flags); | |
959 | } | |
960 | ||
961 | /** | |
962 | * tx_urb_complete - completes the execution of an URB | |
963 | * @urb: a URB | |
964 | * | |
965 | * This function is called if the URB has been transferred to a device or an | |
966 | * error has happened. | |
967 | */ | |
7d12e780 | 968 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
969 | { |
970 | int r; | |
459c51ad | 971 | struct sk_buff *skb; |
e039fa4a | 972 | struct ieee80211_tx_info *info; |
459c51ad | 973 | struct zd_usb *usb; |
78fc800f JK |
974 | struct zd_usb_tx *tx; |
975 | ||
976 | skb = (struct sk_buff *)urb->context; | |
977 | info = IEEE80211_SKB_CB(skb); | |
978 | /* | |
979 | * grab 'usb' pointer before handing off the skb (since | |
980 | * it might be freed by zd_mac_tx_to_dev or mac80211) | |
981 | */ | |
982 | usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb; | |
983 | tx = &usb->tx; | |
e85d0918 DD |
984 | |
985 | switch (urb->status) { | |
986 | case 0: | |
987 | break; | |
988 | case -ESHUTDOWN: | |
989 | case -EINVAL: | |
990 | case -ENODEV: | |
991 | case -ENOENT: | |
992 | case -ECONNRESET: | |
b312d799 | 993 | case -EPIPE: |
e85d0918 DD |
994 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
995 | break; | |
e85d0918 DD |
996 | default: |
997 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
998 | goto resubmit; | |
999 | } | |
1000 | free_urb: | |
a0fd751f | 1001 | skb_unlink(skb, &usb->tx.submitted_skbs); |
dbabad0c | 1002 | zd_mac_tx_to_dev(skb, urb->status); |
78fc800f | 1003 | usb_free_urb(urb); |
459c51ad | 1004 | tx_dec_submitted_urbs(usb); |
e85d0918 DD |
1005 | return; |
1006 | resubmit: | |
78fc800f | 1007 | usb_anchor_urb(urb, &tx->submitted); |
e85d0918 DD |
1008 | r = usb_submit_urb(urb, GFP_ATOMIC); |
1009 | if (r) { | |
78fc800f | 1010 | usb_unanchor_urb(urb); |
e85d0918 DD |
1011 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); |
1012 | goto free_urb; | |
1013 | } | |
1014 | } | |
1015 | ||
459c51ad DD |
1016 | /** |
1017 | * zd_usb_tx: initiates transfer of a frame of the device | |
1018 | * | |
1019 | * @usb: the zd1211rw-private USB structure | |
1020 | * @skb: a &struct sk_buff pointer | |
1021 | * | |
1022 | * This function tranmits a frame to the device. It doesn't wait for | |
1023 | * completion. The frame must contain the control set and have all the | |
1024 | * control set information available. | |
1025 | * | |
1026 | * The function returns 0 if the transfer has been successfully initiated. | |
e85d0918 | 1027 | */ |
459c51ad | 1028 | int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb) |
e85d0918 DD |
1029 | { |
1030 | int r; | |
a0fd751f | 1031 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 DD |
1032 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
1033 | struct urb *urb; | |
78fc800f | 1034 | struct zd_usb_tx *tx = &usb->tx; |
e85d0918 | 1035 | |
78fc800f JK |
1036 | if (!atomic_read(&tx->enabled)) { |
1037 | r = -ENOENT; | |
1038 | goto out; | |
1039 | } | |
1040 | ||
1041 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
e85d0918 DD |
1042 | if (!urb) { |
1043 | r = -ENOMEM; | |
1044 | goto out; | |
1045 | } | |
1046 | ||
e85d0918 | 1047 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
459c51ad | 1048 | skb->data, skb->len, tx_urb_complete, skb); |
e85d0918 | 1049 | |
a0fd751f JK |
1050 | info->rate_driver_data[1] = (void *)jiffies; |
1051 | skb_queue_tail(&tx->submitted_skbs, skb); | |
78fc800f | 1052 | usb_anchor_urb(urb, &tx->submitted); |
a0fd751f | 1053 | |
e85d0918 | 1054 | r = usb_submit_urb(urb, GFP_ATOMIC); |
78fc800f | 1055 | if (r) { |
24d24c62 | 1056 | dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r); |
78fc800f | 1057 | usb_unanchor_urb(urb); |
a0fd751f | 1058 | skb_unlink(skb, &tx->submitted_skbs); |
e85d0918 | 1059 | goto error; |
78fc800f | 1060 | } |
459c51ad | 1061 | tx_inc_submitted_urbs(usb); |
e85d0918 DD |
1062 | return 0; |
1063 | error: | |
78fc800f | 1064 | usb_free_urb(urb); |
e85d0918 DD |
1065 | out: |
1066 | return r; | |
1067 | } | |
1068 | ||
a0fd751f JK |
1069 | static bool zd_tx_timeout(struct zd_usb *usb) |
1070 | { | |
1071 | struct zd_usb_tx *tx = &usb->tx; | |
1072 | struct sk_buff_head *q = &tx->submitted_skbs; | |
1073 | struct sk_buff *skb, *skbnext; | |
1074 | struct ieee80211_tx_info *info; | |
1075 | unsigned long flags, trans_start; | |
1076 | bool have_timedout = false; | |
1077 | ||
1078 | spin_lock_irqsave(&q->lock, flags); | |
1079 | skb_queue_walk_safe(q, skb, skbnext) { | |
1080 | info = IEEE80211_SKB_CB(skb); | |
1081 | trans_start = (unsigned long)info->rate_driver_data[1]; | |
1082 | ||
1083 | if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) { | |
1084 | have_timedout = true; | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | spin_unlock_irqrestore(&q->lock, flags); | |
1089 | ||
1090 | return have_timedout; | |
1091 | } | |
1092 | ||
1093 | static void zd_tx_watchdog_handler(struct work_struct *work) | |
1094 | { | |
1095 | struct zd_usb *usb = | |
1096 | container_of(work, struct zd_usb, tx.watchdog_work.work); | |
1097 | struct zd_usb_tx *tx = &usb->tx; | |
1098 | ||
1099 | if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled) | |
1100 | goto out; | |
1101 | if (!zd_tx_timeout(usb)) | |
1102 | goto out; | |
1103 | ||
1104 | /* TX halted, try reset */ | |
50db7fa3 | 1105 | dev_warn(zd_usb_dev(usb), "TX-stall detected, resetting device..."); |
a0fd751f JK |
1106 | |
1107 | usb_queue_reset_device(usb->intf); | |
1108 | ||
1109 | /* reset will stop this worker, don't rearm */ | |
1110 | return; | |
1111 | out: | |
1112 | queue_delayed_work(zd_workqueue, &tx->watchdog_work, | |
1113 | ZD_TX_WATCHDOG_INTERVAL); | |
1114 | } | |
1115 | ||
1116 | void zd_tx_watchdog_enable(struct zd_usb *usb) | |
1117 | { | |
1118 | struct zd_usb_tx *tx = &usb->tx; | |
1119 | ||
1120 | if (!tx->watchdog_enabled) { | |
1121 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1122 | queue_delayed_work(zd_workqueue, &tx->watchdog_work, | |
1123 | ZD_TX_WATCHDOG_INTERVAL); | |
1124 | tx->watchdog_enabled = 1; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | void zd_tx_watchdog_disable(struct zd_usb *usb) | |
1129 | { | |
1130 | struct zd_usb_tx *tx = &usb->tx; | |
1131 | ||
1132 | if (tx->watchdog_enabled) { | |
1133 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1134 | tx->watchdog_enabled = 0; | |
1135 | cancel_delayed_work_sync(&tx->watchdog_work); | |
1136 | } | |
1137 | } | |
1138 | ||
1f6ccccc JK |
1139 | static void zd_rx_idle_timer_handler(struct work_struct *work) |
1140 | { | |
1141 | struct zd_usb *usb = | |
1142 | container_of(work, struct zd_usb, rx.idle_work.work); | |
1143 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1144 | ||
1145 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) | |
1146 | return; | |
1147 | ||
1148 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1149 | ||
1150 | /* 30 seconds since last rx, reset rx */ | |
1151 | zd_usb_reset_rx(usb); | |
1152 | } | |
1153 | ||
02353573 JK |
1154 | static void zd_usb_reset_rx_idle_timer_tasklet(unsigned long param) |
1155 | { | |
1156 | struct zd_usb *usb = (struct zd_usb *)param; | |
1157 | ||
1158 | zd_usb_reset_rx_idle_timer(usb); | |
1159 | } | |
1160 | ||
1f6ccccc JK |
1161 | void zd_usb_reset_rx_idle_timer(struct zd_usb *usb) |
1162 | { | |
1163 | struct zd_usb_rx *rx = &usb->rx; | |
1164 | ||
41f63c53 | 1165 | mod_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL); |
1f6ccccc JK |
1166 | } |
1167 | ||
e85d0918 DD |
1168 | static inline void init_usb_interrupt(struct zd_usb *usb) |
1169 | { | |
1170 | struct zd_usb_interrupt *intr = &usb->intr; | |
1171 | ||
1172 | spin_lock_init(&intr->lock); | |
1173 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
1174 | init_completion(&intr->read_regs.completion); | |
c900eff3 | 1175 | atomic_set(&intr->read_regs_enabled, 0); |
0ce34bc8 | 1176 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
1177 | } |
1178 | ||
1179 | static inline void init_usb_rx(struct zd_usb *usb) | |
1180 | { | |
1181 | struct zd_usb_rx *rx = &usb->rx; | |
02353573 | 1182 | |
e85d0918 | 1183 | spin_lock_init(&rx->lock); |
1f6ccccc | 1184 | mutex_init(&rx->setup_mutex); |
e85d0918 DD |
1185 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { |
1186 | rx->usb_packet_size = 512; | |
1187 | } else { | |
1188 | rx->usb_packet_size = 64; | |
1189 | } | |
1190 | ZD_ASSERT(rx->fragment_length == 0); | |
1f6ccccc | 1191 | INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler); |
02353573 JK |
1192 | rx->reset_timer_tasklet.func = zd_usb_reset_rx_idle_timer_tasklet; |
1193 | rx->reset_timer_tasklet.data = (unsigned long)usb; | |
e85d0918 DD |
1194 | } |
1195 | ||
1196 | static inline void init_usb_tx(struct zd_usb *usb) | |
1197 | { | |
459c51ad | 1198 | struct zd_usb_tx *tx = &usb->tx; |
02353573 | 1199 | |
459c51ad | 1200 | spin_lock_init(&tx->lock); |
78fc800f | 1201 | atomic_set(&tx->enabled, 0); |
459c51ad | 1202 | tx->stopped = 0; |
a0fd751f | 1203 | skb_queue_head_init(&tx->submitted_skbs); |
78fc800f | 1204 | init_usb_anchor(&tx->submitted); |
459c51ad | 1205 | tx->submitted_urbs = 0; |
a0fd751f JK |
1206 | tx->watchdog_enabled = 0; |
1207 | INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler); | |
e85d0918 DD |
1208 | } |
1209 | ||
459c51ad | 1210 | void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw, |
e85d0918 DD |
1211 | struct usb_interface *intf) |
1212 | { | |
1213 | memset(usb, 0, sizeof(*usb)); | |
1214 | usb->intf = usb_get_intf(intf); | |
459c51ad | 1215 | usb_set_intfdata(usb->intf, hw); |
eefdbec1 | 1216 | init_usb_anchor(&usb->submitted_cmds); |
e85d0918 DD |
1217 | init_usb_interrupt(usb); |
1218 | init_usb_tx(usb); | |
1219 | init_usb_rx(usb); | |
1220 | } | |
1221 | ||
e85d0918 DD |
1222 | void zd_usb_clear(struct zd_usb *usb) |
1223 | { | |
1224 | usb_set_intfdata(usb->intf, NULL); | |
1225 | usb_put_intf(usb->intf); | |
c48cf125 | 1226 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
1227 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
1228 | } | |
1229 | ||
1230 | static const char *speed(enum usb_device_speed speed) | |
1231 | { | |
1232 | switch (speed) { | |
1233 | case USB_SPEED_LOW: | |
1234 | return "low"; | |
1235 | case USB_SPEED_FULL: | |
1236 | return "full"; | |
1237 | case USB_SPEED_HIGH: | |
1238 | return "high"; | |
1239 | default: | |
1240 | return "unknown speed"; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
1245 | { | |
1246 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
1247 | le16_to_cpu(udev->descriptor.idVendor), | |
1248 | le16_to_cpu(udev->descriptor.idProduct), | |
1249 | get_bcdDevice(udev), | |
1250 | speed(udev->speed)); | |
1251 | } | |
1252 | ||
1253 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
1254 | { | |
1255 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
1256 | return scnprint_id(udev, buffer, size); | |
1257 | } | |
1258 | ||
1259 | #ifdef DEBUG | |
1260 | static void print_id(struct usb_device *udev) | |
1261 | { | |
1262 | char buffer[40]; | |
1263 | ||
1264 | scnprint_id(udev, buffer, sizeof(buffer)); | |
1265 | buffer[sizeof(buffer)-1] = 0; | |
1266 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
1267 | } | |
1268 | #else | |
1269 | #define print_id(udev) do { } while (0) | |
1270 | #endif | |
1271 | ||
a1030e92 DD |
1272 | static int eject_installer(struct usb_interface *intf) |
1273 | { | |
1274 | struct usb_device *udev = interface_to_usbdev(intf); | |
1275 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
1276 | struct usb_endpoint_descriptor *endpoint; | |
1277 | unsigned char *cmd; | |
1278 | u8 bulk_out_ep; | |
1279 | int r; | |
1280 | ||
ca260ece JH |
1281 | if (iface_desc->desc.bNumEndpoints < 2) |
1282 | return -ENODEV; | |
1283 | ||
a1030e92 | 1284 | /* Find bulk out endpoint */ |
11466f13 SS |
1285 | for (r = 1; r >= 0; r--) { |
1286 | endpoint = &iface_desc->endpoint[r].desc; | |
1287 | if (usb_endpoint_dir_out(endpoint) && | |
1288 | usb_endpoint_xfer_bulk(endpoint)) { | |
1289 | bulk_out_ep = endpoint->bEndpointAddress; | |
1290 | break; | |
1291 | } | |
1292 | } | |
1293 | if (r == -1) { | |
a1030e92 DD |
1294 | dev_err(&udev->dev, |
1295 | "zd1211rw: Could not find bulk out endpoint\n"); | |
1296 | return -ENODEV; | |
1297 | } | |
1298 | ||
1299 | cmd = kzalloc(31, GFP_KERNEL); | |
1300 | if (cmd == NULL) | |
1301 | return -ENODEV; | |
1302 | ||
1303 | /* USB bulk command block */ | |
1304 | cmd[0] = 0x55; /* bulk command signature */ | |
1305 | cmd[1] = 0x53; /* bulk command signature */ | |
1306 | cmd[2] = 0x42; /* bulk command signature */ | |
1307 | cmd[3] = 0x43; /* bulk command signature */ | |
1308 | cmd[14] = 6; /* command length */ | |
1309 | ||
1310 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
1311 | cmd[19] = 0x2; /* eject disc */ | |
1312 | ||
1313 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
1314 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
1315 | cmd, 31, NULL, 2000); | |
1316 | kfree(cmd); | |
1317 | if (r) | |
1318 | return r; | |
1319 | ||
1320 | /* At this point, the device disconnects and reconnects with the real | |
1321 | * ID numbers. */ | |
1322 | ||
1323 | usb_set_intfdata(intf, NULL); | |
1324 | return 0; | |
1325 | } | |
1326 | ||
74553aed DD |
1327 | int zd_usb_init_hw(struct zd_usb *usb) |
1328 | { | |
1329 | int r; | |
1330 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1331 | ||
1332 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1333 | ||
1334 | r = upload_firmware(usb); | |
1335 | if (r) { | |
1336 | dev_err(zd_usb_dev(usb), | |
1337 | "couldn't load firmware. Error number %d\n", r); | |
1338 | return r; | |
1339 | } | |
1340 | ||
1341 | r = usb_reset_configuration(zd_usb_to_usbdev(usb)); | |
1342 | if (r) { | |
1343 | dev_dbg_f(zd_usb_dev(usb), | |
1344 | "couldn't reset configuration. Error number %d\n", r); | |
1345 | return r; | |
1346 | } | |
1347 | ||
459c51ad | 1348 | r = zd_mac_init_hw(mac->hw); |
74553aed DD |
1349 | if (r) { |
1350 | dev_dbg_f(zd_usb_dev(usb), | |
1351 | "couldn't initialize mac. Error number %d\n", r); | |
1352 | return r; | |
1353 | } | |
1354 | ||
1355 | usb->initialized = 1; | |
1356 | return 0; | |
1357 | } | |
1358 | ||
e85d0918 DD |
1359 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
1360 | { | |
1361 | int r; | |
1362 | struct usb_device *udev = interface_to_usbdev(intf); | |
459c51ad DD |
1363 | struct zd_usb *usb; |
1364 | struct ieee80211_hw *hw = NULL; | |
e85d0918 DD |
1365 | |
1366 | print_id(udev); | |
1367 | ||
a1030e92 DD |
1368 | if (id->driver_info & DEVICE_INSTALLER) |
1369 | return eject_installer(intf); | |
1370 | ||
e85d0918 DD |
1371 | switch (udev->speed) { |
1372 | case USB_SPEED_LOW: | |
1373 | case USB_SPEED_FULL: | |
1374 | case USB_SPEED_HIGH: | |
1375 | break; | |
1376 | default: | |
1377 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
1378 | r = -ENODEV; | |
1379 | goto error; | |
1380 | } | |
1381 | ||
459c51ad DD |
1382 | r = usb_reset_device(udev); |
1383 | if (r) { | |
1384 | dev_err(&intf->dev, | |
1385 | "couldn't reset usb device. Error number %d\n", r); | |
1386 | goto error; | |
1387 | } | |
6e3632f6 | 1388 | |
459c51ad DD |
1389 | hw = zd_mac_alloc_hw(intf); |
1390 | if (hw == NULL) { | |
e85d0918 DD |
1391 | r = -ENOMEM; |
1392 | goto error; | |
1393 | } | |
1394 | ||
459c51ad | 1395 | usb = &zd_hw_mac(hw)->chip.usb; |
74553aed | 1396 | usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
e85d0918 | 1397 | |
459c51ad | 1398 | r = zd_mac_preinit_hw(hw); |
e85d0918 DD |
1399 | if (r) { |
1400 | dev_dbg_f(&intf->dev, | |
1401 | "couldn't initialize mac. Error number %d\n", r); | |
1402 | goto error; | |
1403 | } | |
1404 | ||
459c51ad | 1405 | r = ieee80211_register_hw(hw); |
e85d0918 DD |
1406 | if (r) { |
1407 | dev_dbg_f(&intf->dev, | |
459c51ad | 1408 | "couldn't register device. Error number %d\n", r); |
e85d0918 DD |
1409 | goto error; |
1410 | } | |
1411 | ||
1412 | dev_dbg_f(&intf->dev, "successful\n"); | |
459c51ad | 1413 | dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy)); |
e85d0918 DD |
1414 | return 0; |
1415 | error: | |
1416 | usb_reset_device(interface_to_usbdev(intf)); | |
459c51ad DD |
1417 | if (hw) { |
1418 | zd_mac_clear(zd_hw_mac(hw)); | |
1419 | ieee80211_free_hw(hw); | |
1420 | } | |
e85d0918 DD |
1421 | return r; |
1422 | } | |
1423 | ||
1424 | static void disconnect(struct usb_interface *intf) | |
1425 | { | |
459c51ad | 1426 | struct ieee80211_hw *hw = zd_intf_to_hw(intf); |
e0579d57 MP |
1427 | struct zd_mac *mac; |
1428 | struct zd_usb *usb; | |
e85d0918 | 1429 | |
a1030e92 DD |
1430 | /* Either something really bad happened, or we're just dealing with |
1431 | * a DEVICE_INSTALLER. */ | |
459c51ad | 1432 | if (hw == NULL) |
a1030e92 DD |
1433 | return; |
1434 | ||
459c51ad | 1435 | mac = zd_hw_mac(hw); |
e0579d57 MP |
1436 | usb = &mac->chip.usb; |
1437 | ||
e85d0918 DD |
1438 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1439 | ||
459c51ad | 1440 | ieee80211_unregister_hw(hw); |
e85d0918 DD |
1441 | |
1442 | /* Just in case something has gone wrong! */ | |
78fc800f | 1443 | zd_usb_disable_tx(usb); |
e85d0918 DD |
1444 | zd_usb_disable_rx(usb); |
1445 | zd_usb_disable_int(usb); | |
1446 | ||
1447 | /* If the disconnect has been caused by a removal of the | |
1448 | * driver module, the reset allows reloading of the driver. If the | |
1449 | * reset will not be executed here, the upload of the firmware in the | |
1450 | * probe function caused by the reloading of the driver will fail. | |
1451 | */ | |
1452 | usb_reset_device(interface_to_usbdev(intf)); | |
1453 | ||
459c51ad DD |
1454 | zd_mac_clear(mac); |
1455 | ieee80211_free_hw(hw); | |
e85d0918 DD |
1456 | dev_dbg(&intf->dev, "disconnected\n"); |
1457 | } | |
1458 | ||
a0fd751f JK |
1459 | static void zd_usb_resume(struct zd_usb *usb) |
1460 | { | |
1461 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1462 | int r; | |
1463 | ||
1464 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1465 | ||
1466 | r = zd_op_start(zd_usb_to_hw(usb)); | |
1467 | if (r < 0) { | |
1468 | dev_warn(zd_usb_dev(usb), "Device resume failed " | |
1469 | "with error code %d. Retrying...\n", r); | |
1470 | if (usb->was_running) | |
1471 | set_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
1472 | usb_queue_reset_device(usb->intf); | |
1473 | return; | |
1474 | } | |
1475 | ||
1476 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) { | |
1477 | r = zd_restore_settings(mac); | |
1478 | if (r < 0) { | |
1479 | dev_dbg(zd_usb_dev(usb), | |
1480 | "failed to restore settings, %d\n", r); | |
1481 | return; | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | static void zd_usb_stop(struct zd_usb *usb) | |
1487 | { | |
1488 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1489 | ||
1490 | zd_op_stop(zd_usb_to_hw(usb)); | |
1491 | ||
1492 | zd_usb_disable_tx(usb); | |
1493 | zd_usb_disable_rx(usb); | |
1494 | zd_usb_disable_int(usb); | |
1495 | ||
1496 | usb->initialized = 0; | |
1497 | } | |
1498 | ||
1499 | static int pre_reset(struct usb_interface *intf) | |
1500 | { | |
1501 | struct ieee80211_hw *hw = usb_get_intfdata(intf); | |
1502 | struct zd_mac *mac; | |
1503 | struct zd_usb *usb; | |
1504 | ||
1505 | if (!hw || intf->condition != USB_INTERFACE_BOUND) | |
1506 | return 0; | |
1507 | ||
1508 | mac = zd_hw_mac(hw); | |
1509 | usb = &mac->chip.usb; | |
1510 | ||
1511 | usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
1512 | ||
1513 | zd_usb_stop(usb); | |
1514 | ||
1515 | mutex_lock(&mac->chip.mutex); | |
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | static int post_reset(struct usb_interface *intf) | |
1520 | { | |
1521 | struct ieee80211_hw *hw = usb_get_intfdata(intf); | |
1522 | struct zd_mac *mac; | |
1523 | struct zd_usb *usb; | |
1524 | ||
1525 | if (!hw || intf->condition != USB_INTERFACE_BOUND) | |
1526 | return 0; | |
1527 | ||
1528 | mac = zd_hw_mac(hw); | |
1529 | usb = &mac->chip.usb; | |
1530 | ||
1531 | mutex_unlock(&mac->chip.mutex); | |
1532 | ||
1533 | if (usb->was_running) | |
1534 | zd_usb_resume(usb); | |
1535 | return 0; | |
1536 | } | |
1537 | ||
e85d0918 | 1538 | static struct usb_driver driver = { |
459c51ad | 1539 | .name = KBUILD_MODNAME, |
e85d0918 DD |
1540 | .id_table = usb_ids, |
1541 | .probe = probe, | |
1542 | .disconnect = disconnect, | |
a0fd751f JK |
1543 | .pre_reset = pre_reset, |
1544 | .post_reset = post_reset, | |
e1f12eb6 | 1545 | .disable_hub_initiated_lpm = 1, |
e85d0918 DD |
1546 | }; |
1547 | ||
bc5f06a8 UK |
1548 | struct workqueue_struct *zd_workqueue; |
1549 | ||
e85d0918 DD |
1550 | static int __init usb_init(void) |
1551 | { | |
1552 | int r; | |
1553 | ||
741fec53 | 1554 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1555 | |
bc5f06a8 UK |
1556 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1557 | if (zd_workqueue == NULL) { | |
741fec53 | 1558 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1559 | return -ENOMEM; |
1560 | } | |
1561 | ||
e85d0918 DD |
1562 | r = usb_register(&driver); |
1563 | if (r) { | |
192b775c | 1564 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1565 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1566 | driver.name, r); | |
e85d0918 DD |
1567 | return r; |
1568 | } | |
1569 | ||
741fec53 | 1570 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1571 | return 0; |
1572 | } | |
1573 | ||
1574 | static void __exit usb_exit(void) | |
1575 | { | |
741fec53 | 1576 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1577 | usb_deregister(&driver); |
bc5f06a8 | 1578 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1579 | } |
1580 | ||
1581 | module_init(usb_init); | |
1582 | module_exit(usb_exit); | |
1583 | ||
59342f6a JK |
1584 | static int zd_ep_regs_out_msg(struct usb_device *udev, void *data, int len, |
1585 | int *actual_length, int timeout) | |
1586 | { | |
1587 | /* In USB 2.0 mode EP_REGS_OUT endpoint is interrupt type. However in | |
1588 | * USB 1.1 mode endpoint is bulk. Select correct type URB by endpoint | |
1589 | * descriptor. | |
1590 | */ | |
1591 | struct usb_host_endpoint *ep; | |
1592 | unsigned int pipe; | |
1593 | ||
1594 | pipe = usb_sndintpipe(udev, EP_REGS_OUT); | |
1595 | ep = usb_pipe_endpoint(udev, pipe); | |
1596 | if (!ep) | |
1597 | return -EINVAL; | |
1598 | ||
1599 | if (usb_endpoint_xfer_int(&ep->desc)) { | |
1600 | return usb_interrupt_msg(udev, pipe, data, len, | |
1601 | actual_length, timeout); | |
1602 | } else { | |
1603 | pipe = usb_sndbulkpipe(udev, EP_REGS_OUT); | |
1604 | return usb_bulk_msg(udev, pipe, data, len, actual_length, | |
1605 | timeout); | |
1606 | } | |
1607 | } | |
1608 | ||
e85d0918 DD |
1609 | static int usb_int_regs_length(unsigned int count) |
1610 | { | |
1611 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1612 | } | |
1613 | ||
c900eff3 JK |
1614 | static void prepare_read_regs_int(struct zd_usb *usb, |
1615 | struct usb_req_read_regs *req, | |
1616 | unsigned int count) | |
e85d0918 DD |
1617 | { |
1618 | struct zd_usb_interrupt *intr = &usb->intr; | |
1619 | ||
a68077de | 1620 | spin_lock_irq(&intr->lock); |
c900eff3 JK |
1621 | atomic_set(&intr->read_regs_enabled, 1); |
1622 | intr->read_regs.req = req; | |
1623 | intr->read_regs.req_count = count; | |
16735d02 | 1624 | reinit_completion(&intr->read_regs.completion); |
a68077de UK |
1625 | spin_unlock_irq(&intr->lock); |
1626 | } | |
1627 | ||
1628 | static void disable_read_regs_int(struct zd_usb *usb) | |
1629 | { | |
1630 | struct zd_usb_interrupt *intr = &usb->intr; | |
1631 | ||
1632 | spin_lock_irq(&intr->lock); | |
c900eff3 | 1633 | atomic_set(&intr->read_regs_enabled, 0); |
a68077de | 1634 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1635 | } |
1636 | ||
c900eff3 JK |
1637 | static bool check_read_regs(struct zd_usb *usb, struct usb_req_read_regs *req, |
1638 | unsigned int count) | |
e85d0918 | 1639 | { |
e85d0918 DD |
1640 | int i; |
1641 | struct zd_usb_interrupt *intr = &usb->intr; | |
1642 | struct read_regs_int *rr = &intr->read_regs; | |
1643 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1644 | ||
e85d0918 DD |
1645 | /* The created block size seems to be larger than expected. |
1646 | * However results appear to be correct. | |
1647 | */ | |
1648 | if (rr->length < usb_int_regs_length(count)) { | |
1649 | dev_dbg_f(zd_usb_dev(usb), | |
1650 | "error: actual length %d less than expected %d\n", | |
1651 | rr->length, usb_int_regs_length(count)); | |
c900eff3 | 1652 | return false; |
e85d0918 | 1653 | } |
c900eff3 | 1654 | |
e85d0918 DD |
1655 | if (rr->length > sizeof(rr->buffer)) { |
1656 | dev_dbg_f(zd_usb_dev(usb), | |
1657 | "error: actual length %d exceeds buffer size %zu\n", | |
1658 | rr->length, sizeof(rr->buffer)); | |
c900eff3 | 1659 | return false; |
e85d0918 DD |
1660 | } |
1661 | ||
1662 | for (i = 0; i < count; i++) { | |
1663 | struct reg_data *rd = ®s->regs[i]; | |
1664 | if (rd->addr != req->addr[i]) { | |
1665 | dev_dbg_f(zd_usb_dev(usb), | |
1666 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1667 | le16_to_cpu(rd->addr), | |
1668 | le16_to_cpu(req->addr[i])); | |
c900eff3 | 1669 | return false; |
e85d0918 | 1670 | } |
c900eff3 JK |
1671 | } |
1672 | ||
1673 | return true; | |
1674 | } | |
1675 | ||
1676 | static int get_results(struct zd_usb *usb, u16 *values, | |
1677 | struct usb_req_read_regs *req, unsigned int count, | |
1678 | bool *retry) | |
1679 | { | |
1680 | int r; | |
1681 | int i; | |
1682 | struct zd_usb_interrupt *intr = &usb->intr; | |
1683 | struct read_regs_int *rr = &intr->read_regs; | |
1684 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1685 | ||
1686 | spin_lock_irq(&intr->lock); | |
1687 | ||
1688 | r = -EIO; | |
1689 | ||
1690 | /* Read failed because firmware bug? */ | |
1691 | *retry = !!intr->read_regs_int_overridden; | |
1692 | if (*retry) | |
1693 | goto error_unlock; | |
1694 | ||
1695 | if (!check_read_regs(usb, req, count)) { | |
1696 | dev_dbg_f(zd_usb_dev(usb), "error: invalid read regs\n"); | |
1697 | goto error_unlock; | |
1698 | } | |
1699 | ||
1700 | for (i = 0; i < count; i++) { | |
1701 | struct reg_data *rd = ®s->regs[i]; | |
e85d0918 DD |
1702 | values[i] = le16_to_cpu(rd->value); |
1703 | } | |
1704 | ||
1705 | r = 0; | |
1706 | error_unlock: | |
a68077de | 1707 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1708 | return r; |
1709 | } | |
1710 | ||
1711 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1712 | const zd_addr_t *addresses, unsigned int count) | |
1713 | { | |
c900eff3 | 1714 | int r, i, req_len, actual_req_len, try_count = 0; |
e85d0918 DD |
1715 | struct usb_device *udev; |
1716 | struct usb_req_read_regs *req = NULL; | |
1717 | unsigned long timeout; | |
c900eff3 | 1718 | bool retry = false; |
e85d0918 DD |
1719 | |
1720 | if (count < 1) { | |
1721 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1722 | return -EINVAL; | |
1723 | } | |
1724 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1725 | dev_dbg_f(zd_usb_dev(usb), | |
1726 | "error: count %u exceeds possible max %u\n", | |
1727 | count, USB_MAX_IOREAD16_COUNT); | |
1728 | return -EINVAL; | |
1729 | } | |
1730 | if (in_atomic()) { | |
1731 | dev_dbg_f(zd_usb_dev(usb), | |
1732 | "error: io in atomic context not supported\n"); | |
1733 | return -EWOULDBLOCK; | |
1734 | } | |
1735 | if (!usb_int_enabled(usb)) { | |
9bca0c3b | 1736 | dev_dbg_f(zd_usb_dev(usb), |
e85d0918 DD |
1737 | "error: usb interrupt not enabled\n"); |
1738 | return -EWOULDBLOCK; | |
1739 | } | |
1740 | ||
9bca0c3b JK |
1741 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); |
1742 | BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT * | |
1743 | sizeof(__le16) > sizeof(usb->req_buf)); | |
1744 | BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) > | |
1745 | sizeof(usb->req_buf)); | |
1746 | ||
e85d0918 | 1747 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); |
9bca0c3b JK |
1748 | req = (void *)usb->req_buf; |
1749 | ||
e85d0918 DD |
1750 | req->id = cpu_to_le16(USB_REQ_READ_REGS); |
1751 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1752 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 | 1753 | |
c900eff3 JK |
1754 | retry_read: |
1755 | try_count++; | |
e85d0918 | 1756 | udev = zd_usb_to_usbdev(usb); |
c900eff3 | 1757 | prepare_read_regs_int(usb, req, count); |
59342f6a | 1758 | r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/); |
e85d0918 DD |
1759 | if (r) { |
1760 | dev_dbg_f(zd_usb_dev(usb), | |
59342f6a | 1761 | "error in zd_ep_regs_out_msg(). Error number %d\n", r); |
e85d0918 DD |
1762 | goto error; |
1763 | } | |
1764 | if (req_len != actual_req_len) { | |
59342f6a | 1765 | dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()\n" |
e85d0918 DD |
1766 | " req_len %d != actual_req_len %d\n", |
1767 | req_len, actual_req_len); | |
1768 | r = -EIO; | |
1769 | goto error; | |
1770 | } | |
1771 | ||
1772 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
8f2d8f86 | 1773 | msecs_to_jiffies(50)); |
e85d0918 DD |
1774 | if (!timeout) { |
1775 | disable_read_regs_int(usb); | |
1776 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1777 | r = -ETIMEDOUT; | |
1778 | goto error; | |
1779 | } | |
1780 | ||
c900eff3 JK |
1781 | r = get_results(usb, values, req, count, &retry); |
1782 | if (retry && try_count < 20) { | |
1783 | dev_dbg_f(zd_usb_dev(usb), "read retry, tries so far: %d\n", | |
1784 | try_count); | |
1785 | goto retry_read; | |
1786 | } | |
e85d0918 | 1787 | error: |
e85d0918 DD |
1788 | return r; |
1789 | } | |
1790 | ||
eefdbec1 JK |
1791 | static void iowrite16v_urb_complete(struct urb *urb) |
1792 | { | |
1793 | struct zd_usb *usb = urb->context; | |
1794 | ||
1795 | if (urb->status && !usb->cmd_error) | |
1796 | usb->cmd_error = urb->status; | |
2fc713b2 JK |
1797 | |
1798 | if (!usb->cmd_error && | |
1799 | urb->actual_length != urb->transfer_buffer_length) | |
1800 | usb->cmd_error = -EIO; | |
eefdbec1 JK |
1801 | } |
1802 | ||
1803 | static int zd_submit_waiting_urb(struct zd_usb *usb, bool last) | |
1804 | { | |
8662b251 | 1805 | int r = 0; |
eefdbec1 JK |
1806 | struct urb *urb = usb->urb_async_waiting; |
1807 | ||
1808 | if (!urb) | |
1809 | return 0; | |
1810 | ||
1811 | usb->urb_async_waiting = NULL; | |
1812 | ||
1813 | if (!last) | |
1814 | urb->transfer_flags |= URB_NO_INTERRUPT; | |
1815 | ||
1816 | usb_anchor_urb(urb, &usb->submitted_cmds); | |
1817 | r = usb_submit_urb(urb, GFP_KERNEL); | |
1818 | if (r) { | |
1819 | usb_unanchor_urb(urb); | |
1820 | dev_dbg_f(zd_usb_dev(usb), | |
1821 | "error in usb_submit_urb(). Error number %d\n", r); | |
1822 | goto error; | |
1823 | } | |
1824 | ||
1825 | /* fall-through with r == 0 */ | |
1826 | error: | |
1827 | usb_free_urb(urb); | |
1828 | return r; | |
1829 | } | |
1830 | ||
8662b251 | 1831 | void zd_usb_iowrite16v_async_start(struct zd_usb *usb) |
eefdbec1 JK |
1832 | { |
1833 | ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds)); | |
1834 | ZD_ASSERT(usb->urb_async_waiting == NULL); | |
1835 | ZD_ASSERT(!usb->in_async); | |
1836 | ||
1837 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); | |
1838 | ||
1839 | usb->in_async = 1; | |
1840 | usb->cmd_error = 0; | |
1841 | usb->urb_async_waiting = NULL; | |
1842 | } | |
1843 | ||
8662b251 | 1844 | int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout) |
eefdbec1 JK |
1845 | { |
1846 | int r; | |
1847 | ||
1848 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); | |
1849 | ZD_ASSERT(usb->in_async); | |
1850 | ||
1851 | /* Submit last iowrite16v URB */ | |
1852 | r = zd_submit_waiting_urb(usb, true); | |
1853 | if (r) { | |
1854 | dev_dbg_f(zd_usb_dev(usb), | |
1855 | "error in zd_submit_waiting_usb(). " | |
1856 | "Error number %d\n", r); | |
1857 | ||
1858 | usb_kill_anchored_urbs(&usb->submitted_cmds); | |
1859 | goto error; | |
1860 | } | |
1861 | ||
1862 | if (timeout) | |
1863 | timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds, | |
1864 | timeout); | |
1865 | if (!timeout) { | |
1866 | usb_kill_anchored_urbs(&usb->submitted_cmds); | |
1867 | if (usb->cmd_error == -ENOENT) { | |
1868 | dev_dbg_f(zd_usb_dev(usb), "timed out"); | |
1869 | r = -ETIMEDOUT; | |
1870 | goto error; | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | r = usb->cmd_error; | |
1875 | error: | |
1876 | usb->in_async = 0; | |
1877 | return r; | |
1878 | } | |
1879 | ||
8662b251 JK |
1880 | int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, |
1881 | unsigned int count) | |
e85d0918 DD |
1882 | { |
1883 | int r; | |
1884 | struct usb_device *udev; | |
1885 | struct usb_req_write_regs *req = NULL; | |
eefdbec1 JK |
1886 | int i, req_len; |
1887 | struct urb *urb; | |
1888 | struct usb_host_endpoint *ep; | |
1889 | ||
1890 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); | |
1891 | ZD_ASSERT(usb->in_async); | |
e85d0918 DD |
1892 | |
1893 | if (count == 0) | |
1894 | return 0; | |
1895 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1896 | dev_dbg_f(zd_usb_dev(usb), | |
1897 | "error: count %u exceeds possible max %u\n", | |
1898 | count, USB_MAX_IOWRITE16_COUNT); | |
1899 | return -EINVAL; | |
1900 | } | |
1901 | if (in_atomic()) { | |
1902 | dev_dbg_f(zd_usb_dev(usb), | |
1903 | "error: io in atomic context not supported\n"); | |
1904 | return -EWOULDBLOCK; | |
1905 | } | |
1906 | ||
eefdbec1 JK |
1907 | udev = zd_usb_to_usbdev(usb); |
1908 | ||
1909 | ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT)); | |
1910 | if (!ep) | |
1911 | return -ENOENT; | |
1912 | ||
1913 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
1914 | if (!urb) | |
1915 | return -ENOMEM; | |
9bca0c3b | 1916 | |
e85d0918 DD |
1917 | req_len = sizeof(struct usb_req_write_regs) + |
1918 | count * sizeof(struct reg_data); | |
eefdbec1 JK |
1919 | req = kmalloc(req_len, GFP_KERNEL); |
1920 | if (!req) { | |
1921 | r = -ENOMEM; | |
1922 | goto error; | |
1923 | } | |
e85d0918 DD |
1924 | |
1925 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1926 | for (i = 0; i < count; i++) { | |
1927 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1928 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1929 | rw->value = cpu_to_le16(ioreqs[i].value); |
1930 | } | |
1931 | ||
59342f6a JK |
1932 | /* In USB 2.0 mode endpoint is interrupt type. However in USB 1.1 mode |
1933 | * endpoint is bulk. Select correct type URB by endpoint descriptor. | |
1934 | */ | |
1935 | if (usb_endpoint_xfer_int(&ep->desc)) | |
1936 | usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT), | |
1937 | req, req_len, iowrite16v_urb_complete, usb, | |
1938 | ep->desc.bInterval); | |
1939 | else | |
1940 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1941 | req, req_len, iowrite16v_urb_complete, usb); | |
1942 | ||
2fc713b2 | 1943 | urb->transfer_flags |= URB_FREE_BUFFER; |
eefdbec1 JK |
1944 | |
1945 | /* Submit previous URB */ | |
1946 | r = zd_submit_waiting_urb(usb, false); | |
e85d0918 DD |
1947 | if (r) { |
1948 | dev_dbg_f(zd_usb_dev(usb), | |
eefdbec1 JK |
1949 | "error in zd_submit_waiting_usb(). " |
1950 | "Error number %d\n", r); | |
e85d0918 DD |
1951 | goto error; |
1952 | } | |
1953 | ||
eefdbec1 JK |
1954 | /* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs |
1955 | * of currect batch except for very last. | |
1956 | */ | |
1957 | usb->urb_async_waiting = urb; | |
1958 | return 0; | |
e85d0918 | 1959 | error: |
eefdbec1 | 1960 | usb_free_urb(urb); |
e85d0918 DD |
1961 | return r; |
1962 | } | |
1963 | ||
eefdbec1 JK |
1964 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, |
1965 | unsigned int count) | |
1966 | { | |
1967 | int r; | |
1968 | ||
1969 | zd_usb_iowrite16v_async_start(usb); | |
1970 | r = zd_usb_iowrite16v_async(usb, ioreqs, count); | |
1971 | if (r) { | |
1972 | zd_usb_iowrite16v_async_end(usb, 0); | |
1973 | return r; | |
1974 | } | |
1975 | return zd_usb_iowrite16v_async_end(usb, 50 /* ms */); | |
1976 | } | |
1977 | ||
e85d0918 DD |
1978 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) |
1979 | { | |
1980 | int r; | |
1981 | struct usb_device *udev; | |
1982 | struct usb_req_rfwrite *req = NULL; | |
1983 | int i, req_len, actual_req_len; | |
1984 | u16 bit_value_template; | |
1985 | ||
1986 | if (in_atomic()) { | |
1987 | dev_dbg_f(zd_usb_dev(usb), | |
1988 | "error: io in atomic context not supported\n"); | |
1989 | return -EWOULDBLOCK; | |
1990 | } | |
1991 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1992 | dev_dbg_f(zd_usb_dev(usb), | |
1993 | "error: bits %d are smaller than" | |
1994 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1995 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1996 | return -EINVAL; | |
1997 | } | |
1998 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1999 | dev_dbg_f(zd_usb_dev(usb), | |
2000 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
2001 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
2002 | return -EINVAL; | |
2003 | } | |
2004 | #ifdef DEBUG | |
2005 | if (value & (~0UL << bits)) { | |
2006 | dev_dbg_f(zd_usb_dev(usb), | |
2007 | "error: value %#09x has bits >= %d set\n", | |
2008 | value, bits); | |
2009 | return -EINVAL; | |
2010 | } | |
2011 | #endif /* DEBUG */ | |
2012 | ||
2013 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
2014 | ||
fbd5d17b | 2015 | r = zd_usb_ioread16(usb, &bit_value_template, ZD_CR203); |
e85d0918 DD |
2016 | if (r) { |
2017 | dev_dbg_f(zd_usb_dev(usb), | |
fbd5d17b | 2018 | "error %d: Couldn't read ZD_CR203\n", r); |
9bca0c3b | 2019 | return r; |
e85d0918 DD |
2020 | } |
2021 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
2022 | ||
9bca0c3b JK |
2023 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); |
2024 | BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) + | |
2025 | USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) > | |
2026 | sizeof(usb->req_buf)); | |
2027 | BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) > | |
2028 | sizeof(usb->req_buf)); | |
2029 | ||
e85d0918 | 2030 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); |
9bca0c3b | 2031 | req = (void *)usb->req_buf; |
e85d0918 DD |
2032 | |
2033 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
2034 | /* 1: 3683a, but not used in ZYDAS driver */ | |
2035 | req->value = cpu_to_le16(2); | |
2036 | req->bits = cpu_to_le16(bits); | |
2037 | ||
2038 | for (i = 0; i < bits; i++) { | |
2039 | u16 bv = bit_value_template; | |
2040 | if (value & (1 << (bits-1-i))) | |
2041 | bv |= RF_DATA; | |
2042 | req->bit_values[i] = cpu_to_le16(bv); | |
2043 | } | |
2044 | ||
2045 | udev = zd_usb_to_usbdev(usb); | |
59342f6a | 2046 | r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/); |
e85d0918 DD |
2047 | if (r) { |
2048 | dev_dbg_f(zd_usb_dev(usb), | |
59342f6a | 2049 | "error in zd_ep_regs_out_msg(). Error number %d\n", r); |
e85d0918 DD |
2050 | goto out; |
2051 | } | |
2052 | if (req_len != actual_req_len) { | |
59342f6a | 2053 | dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()" |
e85d0918 DD |
2054 | " req_len %d != actual_req_len %d\n", |
2055 | req_len, actual_req_len); | |
2056 | r = -EIO; | |
2057 | goto out; | |
2058 | } | |
2059 | ||
2060 | /* FALL-THROUGH with r == 0 */ | |
2061 | out: | |
e85d0918 DD |
2062 | return r; |
2063 | } |