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