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> |
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 }, | |
63 | { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, | |
64 | { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, | |
e85d0918 | 65 | /* ZD1211B */ |
3bfbe80e | 66 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
ad580db5 | 67 | { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
68 | { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
69 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
70 | { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B }, | |
71 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, | |
8b339d05 | 72 | { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
73 | { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B }, |
74 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, | |
75 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
76 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, | |
77 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, | |
dd2f5538 | 78 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
79 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B }, |
80 | { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B }, | |
81 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, | |
8f75e07a | 82 | { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B }, |
f72151fb | 83 | { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B }, |
9dfd5500 | 84 | { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
85 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, |
86 | { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B }, | |
aec91028 | 87 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
c445a31c | 88 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
8e97afe5 | 89 | { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
de262496 | 90 | { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B }, |
3bfbe80e HTL |
91 | { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
92 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, | |
93 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, | |
94 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, | |
95 | { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, | |
8cecc90e | 96 | { USB_DEVICE(0x2019, 0xed01), .driver_info = DEVICE_ZD1211B }, |
a1030e92 DD |
97 | /* "Driverless" devices that need ejecting */ |
98 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 99 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
100 | {} |
101 | }; | |
102 | ||
103 | MODULE_LICENSE("GPL"); | |
104 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
105 | MODULE_AUTHOR("Ulrich Kunitz"); | |
106 | MODULE_AUTHOR("Daniel Drake"); | |
107 | MODULE_VERSION("1.0"); | |
108 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
109 | ||
110 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
111 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
112 | ||
e85d0918 | 113 | /* USB device initialization */ |
72e77a8a | 114 | static void int_urb_complete(struct urb *urb); |
e85d0918 DD |
115 | |
116 | static int request_fw_file( | |
117 | const struct firmware **fw, const char *name, struct device *device) | |
118 | { | |
119 | int r; | |
120 | ||
121 | dev_dbg_f(device, "fw name %s\n", name); | |
122 | ||
123 | r = request_firmware(fw, name, device); | |
124 | if (r) | |
125 | dev_err(device, | |
126 | "Could not load firmware file %s. Error number %d\n", | |
127 | name, r); | |
128 | return r; | |
129 | } | |
130 | ||
131 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
132 | { | |
133 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
134 | } | |
135 | ||
136 | enum upload_code_flags { | |
137 | REBOOT = 1, | |
138 | }; | |
139 | ||
140 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
141 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
142 | ||
143 | static int upload_code(struct usb_device *udev, | |
144 | const u8 *data, size_t size, u16 code_offset, int flags) | |
145 | { | |
146 | u8 *p; | |
147 | int r; | |
148 | ||
149 | /* USB request blocks need "kmalloced" buffers. | |
150 | */ | |
151 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
152 | if (!p) { | |
153 | dev_err(&udev->dev, "out of memory\n"); | |
154 | r = -ENOMEM; | |
155 | goto error; | |
156 | } | |
157 | ||
158 | size &= ~1; | |
159 | while (size > 0) { | |
160 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
161 | size : MAX_TRANSFER_SIZE; | |
162 | ||
163 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
164 | ||
165 | memcpy(p, data, transfer_size); | |
166 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
167 | USB_REQ_FIRMWARE_DOWNLOAD, | |
168 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
169 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
170 | if (r < 0) { | |
171 | dev_err(&udev->dev, | |
172 | "USB control request for firmware upload" | |
173 | " failed. Error number %d\n", r); | |
174 | goto error; | |
175 | } | |
176 | transfer_size = r & ~1; | |
177 | ||
178 | size -= transfer_size; | |
179 | data += transfer_size; | |
180 | code_offset += transfer_size/sizeof(u16); | |
181 | } | |
182 | ||
183 | if (flags & REBOOT) { | |
184 | u8 ret; | |
185 | ||
a8c4ea7a | 186 | /* Use "DMA-aware" buffer. */ |
e85d0918 DD |
187 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
188 | USB_REQ_FIRMWARE_CONFIRM, | |
189 | USB_DIR_IN | USB_TYPE_VENDOR, | |
a8c4ea7a | 190 | 0, 0, p, sizeof(ret), 5000 /* ms */); |
e85d0918 DD |
191 | if (r != sizeof(ret)) { |
192 | dev_err(&udev->dev, | |
193 | "control request firmeware confirmation failed." | |
194 | " Return value %d\n", r); | |
195 | if (r >= 0) | |
196 | r = -ENODEV; | |
197 | goto error; | |
198 | } | |
a8c4ea7a | 199 | ret = p[0]; |
e85d0918 DD |
200 | if (ret & 0x80) { |
201 | dev_err(&udev->dev, | |
202 | "Internal error while downloading." | |
203 | " Firmware confirm return value %#04x\n", | |
204 | (unsigned int)ret); | |
205 | r = -ENODEV; | |
206 | goto error; | |
207 | } | |
208 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
209 | (unsigned int)ret); | |
210 | } | |
211 | ||
212 | r = 0; | |
213 | error: | |
214 | kfree(p); | |
215 | return r; | |
216 | } | |
217 | ||
218 | static u16 get_word(const void *data, u16 offset) | |
219 | { | |
220 | const __le16 *p = data; | |
221 | return le16_to_cpu(p[offset]); | |
222 | } | |
223 | ||
74553aed | 224 | static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
e85d0918 DD |
225 | const char* postfix) |
226 | { | |
227 | scnprintf(buffer, size, "%s%s", | |
74553aed | 228 | usb->is_zd1211b ? |
e85d0918 DD |
229 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
230 | postfix); | |
231 | return buffer; | |
232 | } | |
233 | ||
74553aed | 234 | static int handle_version_mismatch(struct zd_usb *usb, |
d066c219 DD |
235 | const struct firmware *ub_fw) |
236 | { | |
74553aed | 237 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
d066c219 DD |
238 | const struct firmware *ur_fw = NULL; |
239 | int offset; | |
240 | int r = 0; | |
241 | char fw_name[128]; | |
242 | ||
243 | r = request_fw_file(&ur_fw, | |
74553aed | 244 | get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
d066c219 DD |
245 | &udev->dev); |
246 | if (r) | |
247 | goto error; | |
248 | ||
ee302767 | 249 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
250 | if (r) |
251 | goto error; | |
252 | ||
ee302767 | 253 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 254 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 255 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
256 | |
257 | /* At this point, the vendor driver downloads the whole firmware | |
258 | * image, hacks around with version IDs, and uploads it again, | |
259 | * completely overwriting the boot code. We do not do this here as | |
260 | * it is not required on any tested devices, and it is suspected to | |
261 | * cause problems. */ | |
262 | error: | |
263 | release_firmware(ur_fw); | |
264 | return r; | |
265 | } | |
266 | ||
74553aed | 267 | static int upload_firmware(struct zd_usb *usb) |
e85d0918 DD |
268 | { |
269 | int r; | |
270 | u16 fw_bcdDevice; | |
271 | u16 bcdDevice; | |
74553aed | 272 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
273 | const struct firmware *ub_fw = NULL; |
274 | const struct firmware *uph_fw = NULL; | |
275 | char fw_name[128]; | |
276 | ||
277 | bcdDevice = get_bcdDevice(udev); | |
278 | ||
279 | r = request_fw_file(&ub_fw, | |
74553aed | 280 | get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
e85d0918 DD |
281 | &udev->dev); |
282 | if (r) | |
283 | goto error; | |
284 | ||
ee302767 | 285 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 286 | |
e85d0918 DD |
287 | if (fw_bcdDevice != bcdDevice) { |
288 | dev_info(&udev->dev, | |
d066c219 DD |
289 | "firmware version %#06x and device bootcode version " |
290 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
291 | if (bcdDevice <= 0x4313) | |
292 | dev_warn(&udev->dev, "device has old bootcode, please " | |
293 | "report success or failure\n"); | |
294 | ||
74553aed | 295 | r = handle_version_mismatch(usb, ub_fw); |
d066c219 DD |
296 | if (r) |
297 | goto error; | |
e85d0918 DD |
298 | } else { |
299 | dev_dbg_f(&udev->dev, | |
300 | "firmware device id %#06x is equal to the " | |
301 | "actual device id\n", fw_bcdDevice); | |
302 | } | |
303 | ||
304 | ||
305 | r = request_fw_file(&uph_fw, | |
74553aed | 306 | get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
e85d0918 DD |
307 | &udev->dev); |
308 | if (r) | |
309 | goto error; | |
310 | ||
ee302767 | 311 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
312 | if (r) { |
313 | dev_err(&udev->dev, | |
314 | "Could not upload firmware code uph. Error number %d\n", | |
315 | r); | |
316 | } | |
317 | ||
318 | /* FALL-THROUGH */ | |
319 | error: | |
320 | release_firmware(ub_fw); | |
321 | release_firmware(uph_fw); | |
322 | return r; | |
323 | } | |
324 | ||
3e8b4d00 BH |
325 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur"); |
326 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur"); | |
327 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub"); | |
328 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub"); | |
329 | MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr"); | |
330 | MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr"); | |
331 | ||
74553aed DD |
332 | /* Read data from device address space using "firmware interface" which does |
333 | * not require firmware to be loaded. */ | |
334 | int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) | |
335 | { | |
336 | int r; | |
337 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
a8c4ea7a | 338 | u8 *buf; |
74553aed | 339 | |
a8c4ea7a AN |
340 | /* Use "DMA-aware" buffer. */ |
341 | buf = kmalloc(len, GFP_KERNEL); | |
342 | if (!buf) | |
343 | return -ENOMEM; | |
74553aed DD |
344 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
345 | USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, | |
a8c4ea7a | 346 | buf, len, 5000); |
74553aed DD |
347 | if (r < 0) { |
348 | dev_err(&udev->dev, | |
349 | "read over firmware interface failed: %d\n", r); | |
a8c4ea7a | 350 | goto exit; |
74553aed DD |
351 | } else if (r != len) { |
352 | dev_err(&udev->dev, | |
353 | "incomplete read over firmware interface: %d/%d\n", | |
354 | r, len); | |
a8c4ea7a AN |
355 | r = -EIO; |
356 | goto exit; | |
74553aed | 357 | } |
a8c4ea7a AN |
358 | r = 0; |
359 | memcpy(data, buf, len); | |
360 | exit: | |
361 | kfree(buf); | |
362 | return r; | |
74553aed DD |
363 | } |
364 | ||
e85d0918 DD |
365 | #define urb_dev(urb) (&(urb)->dev->dev) |
366 | ||
367 | static inline void handle_regs_int(struct urb *urb) | |
368 | { | |
369 | struct zd_usb *usb = urb->context; | |
370 | struct zd_usb_interrupt *intr = &usb->intr; | |
371 | int len; | |
72e77a8a | 372 | u16 int_num; |
e85d0918 DD |
373 | |
374 | ZD_ASSERT(in_interrupt()); | |
375 | spin_lock(&intr->lock); | |
376 | ||
d63ddcec | 377 | int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); |
72e77a8a LCC |
378 | if (int_num == CR_INTERRUPT) { |
379 | struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); | |
8b17f75c | 380 | spin_lock(&mac->lock); |
72e77a8a LCC |
381 | memcpy(&mac->intr_buffer, urb->transfer_buffer, |
382 | USB_MAX_EP_INT_BUFFER); | |
8b17f75c | 383 | spin_unlock(&mac->lock); |
72e77a8a LCC |
384 | schedule_work(&mac->process_intr); |
385 | } else if (intr->read_regs_enabled) { | |
e85d0918 DD |
386 | intr->read_regs.length = len = urb->actual_length; |
387 | ||
388 | if (len > sizeof(intr->read_regs.buffer)) | |
389 | len = sizeof(intr->read_regs.buffer); | |
390 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); | |
391 | intr->read_regs_enabled = 0; | |
392 | complete(&intr->read_regs.completion); | |
393 | goto out; | |
394 | } | |
395 | ||
e85d0918 DD |
396 | out: |
397 | spin_unlock(&intr->lock); | |
398 | } | |
399 | ||
7d12e780 | 400 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
401 | { |
402 | int r; | |
403 | struct usb_int_header *hdr; | |
404 | ||
405 | switch (urb->status) { | |
406 | case 0: | |
407 | break; | |
408 | case -ESHUTDOWN: | |
409 | case -EINVAL: | |
410 | case -ENODEV: | |
411 | case -ENOENT: | |
412 | case -ECONNRESET: | |
e85d0918 | 413 | case -EPIPE: |
24d24c62 | 414 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
4a3b0874 | 415 | return; |
e85d0918 | 416 | default: |
24d24c62 | 417 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
e85d0918 DD |
418 | goto resubmit; |
419 | } | |
420 | ||
421 | if (urb->actual_length < sizeof(hdr)) { | |
422 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
423 | goto resubmit; | |
424 | } | |
425 | ||
426 | hdr = urb->transfer_buffer; | |
427 | if (hdr->type != USB_INT_TYPE) { | |
428 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
429 | goto resubmit; | |
430 | } | |
431 | ||
432 | switch (hdr->id) { | |
433 | case USB_INT_ID_REGS: | |
434 | handle_regs_int(urb); | |
435 | break; | |
436 | case USB_INT_ID_RETRY_FAILED: | |
7f4013f0 | 437 | zd_mac_tx_failed(urb); |
e85d0918 DD |
438 | break; |
439 | default: | |
440 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
441 | (unsigned int)hdr->id); | |
442 | goto resubmit; | |
443 | } | |
444 | ||
445 | resubmit: | |
446 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
447 | if (r) { | |
4a3b0874 JK |
448 | dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n", |
449 | urb, r); | |
450 | /* TODO: add worker to reset intr->urb */ | |
e85d0918 DD |
451 | } |
452 | return; | |
e85d0918 DD |
453 | } |
454 | ||
455 | static inline int int_urb_interval(struct usb_device *udev) | |
456 | { | |
457 | switch (udev->speed) { | |
458 | case USB_SPEED_HIGH: | |
459 | return 4; | |
460 | case USB_SPEED_LOW: | |
461 | return 10; | |
462 | case USB_SPEED_FULL: | |
463 | default: | |
464 | return 1; | |
465 | } | |
466 | } | |
467 | ||
468 | static inline int usb_int_enabled(struct zd_usb *usb) | |
469 | { | |
470 | unsigned long flags; | |
471 | struct zd_usb_interrupt *intr = &usb->intr; | |
472 | struct urb *urb; | |
473 | ||
474 | spin_lock_irqsave(&intr->lock, flags); | |
475 | urb = intr->urb; | |
476 | spin_unlock_irqrestore(&intr->lock, flags); | |
477 | return urb != NULL; | |
478 | } | |
479 | ||
480 | int zd_usb_enable_int(struct zd_usb *usb) | |
481 | { | |
482 | int r; | |
4a3b0874 | 483 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 | 484 | struct zd_usb_interrupt *intr = &usb->intr; |
e85d0918 DD |
485 | struct urb *urb; |
486 | ||
487 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
488 | ||
35c3404e | 489 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
490 | if (!urb) { |
491 | r = -ENOMEM; | |
492 | goto out; | |
493 | } | |
494 | ||
495 | ZD_ASSERT(!irqs_disabled()); | |
496 | spin_lock_irq(&intr->lock); | |
497 | if (intr->urb) { | |
498 | spin_unlock_irq(&intr->lock); | |
499 | r = 0; | |
500 | goto error_free_urb; | |
501 | } | |
502 | intr->urb = urb; | |
503 | spin_unlock_irq(&intr->lock); | |
504 | ||
e85d0918 | 505 | r = -ENOMEM; |
4a3b0874 JK |
506 | intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER, |
507 | GFP_KERNEL, &intr->buffer_dma); | |
508 | if (!intr->buffer) { | |
e85d0918 DD |
509 | dev_dbg_f(zd_usb_dev(usb), |
510 | "couldn't allocate transfer_buffer\n"); | |
511 | goto error_set_urb_null; | |
512 | } | |
513 | ||
e85d0918 | 514 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), |
4a3b0874 | 515 | intr->buffer, USB_MAX_EP_INT_BUFFER, |
e85d0918 DD |
516 | int_urb_complete, usb, |
517 | intr->interval); | |
4a3b0874 JK |
518 | urb->transfer_dma = intr->buffer_dma; |
519 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
e85d0918 DD |
520 | |
521 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 522 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
523 | if (r) { |
524 | dev_dbg_f(zd_usb_dev(usb), | |
525 | "Couldn't submit urb. Error number %d\n", r); | |
526 | goto error; | |
527 | } | |
528 | ||
529 | return 0; | |
530 | error: | |
4a3b0874 JK |
531 | usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER, |
532 | intr->buffer, intr->buffer_dma); | |
e85d0918 DD |
533 | error_set_urb_null: |
534 | spin_lock_irq(&intr->lock); | |
535 | intr->urb = NULL; | |
536 | spin_unlock_irq(&intr->lock); | |
537 | error_free_urb: | |
538 | usb_free_urb(urb); | |
539 | out: | |
540 | return r; | |
541 | } | |
542 | ||
543 | void zd_usb_disable_int(struct zd_usb *usb) | |
544 | { | |
545 | unsigned long flags; | |
4a3b0874 | 546 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
e85d0918 DD |
547 | struct zd_usb_interrupt *intr = &usb->intr; |
548 | struct urb *urb; | |
4a3b0874 JK |
549 | void *buffer; |
550 | dma_addr_t buffer_dma; | |
e85d0918 DD |
551 | |
552 | spin_lock_irqsave(&intr->lock, flags); | |
553 | urb = intr->urb; | |
554 | if (!urb) { | |
555 | spin_unlock_irqrestore(&intr->lock, flags); | |
556 | return; | |
557 | } | |
558 | intr->urb = NULL; | |
4a3b0874 JK |
559 | buffer = intr->buffer; |
560 | buffer_dma = intr->buffer_dma; | |
561 | intr->buffer = NULL; | |
e85d0918 DD |
562 | spin_unlock_irqrestore(&intr->lock, flags); |
563 | ||
564 | usb_kill_urb(urb); | |
565 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
566 | usb_free_urb(urb); | |
4a3b0874 JK |
567 | |
568 | if (buffer) | |
569 | usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER, | |
570 | buffer, buffer_dma); | |
e85d0918 DD |
571 | } |
572 | ||
573 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
574 | unsigned int length) | |
575 | { | |
576 | int i; | |
e85d0918 DD |
577 | const struct rx_length_info *length_info; |
578 | ||
579 | if (length < sizeof(struct rx_length_info)) { | |
580 | /* It's not a complete packet anyhow. */ | |
7f4013f0 BP |
581 | printk("%s: invalid, small RX packet : %d\n", |
582 | __func__, length); | |
e85d0918 DD |
583 | return; |
584 | } | |
585 | length_info = (struct rx_length_info *) | |
586 | (buffer + length - sizeof(struct rx_length_info)); | |
587 | ||
588 | /* It might be that three frames are merged into a single URB | |
589 | * transaction. We have to check for the length info tag. | |
590 | * | |
591 | * While testing we discovered that length_info might be unaligned, | |
592 | * because if USB transactions are merged, the last packet will not | |
593 | * be padded. Unaligned access might also happen if the length_info | |
594 | * structure is not present. | |
595 | */ | |
533dd1b0 | 596 | if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG) |
b269825b | 597 | { |
e85d0918 DD |
598 | unsigned int l, k, n; |
599 | for (i = 0, l = 0;; i++) { | |
533dd1b0 | 600 | k = get_unaligned_le16(&length_info->length[i]); |
850c211c UK |
601 | if (k == 0) |
602 | return; | |
e85d0918 DD |
603 | n = l+k; |
604 | if (n > length) | |
605 | return; | |
459c51ad | 606 | zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k); |
e85d0918 DD |
607 | if (i >= 2) |
608 | return; | |
609 | l = (n+3) & ~3; | |
610 | } | |
611 | } else { | |
459c51ad | 612 | zd_mac_rx(zd_usb_to_hw(usb), buffer, length); |
e85d0918 DD |
613 | } |
614 | } | |
615 | ||
7d12e780 | 616 | static void rx_urb_complete(struct urb *urb) |
e85d0918 | 617 | { |
24d24c62 | 618 | int r; |
e85d0918 DD |
619 | struct zd_usb *usb; |
620 | struct zd_usb_rx *rx; | |
621 | const u8 *buffer; | |
622 | unsigned int length; | |
623 | ||
624 | switch (urb->status) { | |
625 | case 0: | |
626 | break; | |
627 | case -ESHUTDOWN: | |
628 | case -EINVAL: | |
629 | case -ENODEV: | |
630 | case -ENOENT: | |
631 | case -ECONNRESET: | |
e85d0918 | 632 | case -EPIPE: |
24d24c62 | 633 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
b312d799 | 634 | return; |
e85d0918 DD |
635 | default: |
636 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
637 | goto resubmit; | |
638 | } | |
639 | ||
640 | buffer = urb->transfer_buffer; | |
641 | length = urb->actual_length; | |
642 | usb = urb->context; | |
643 | rx = &usb->rx; | |
644 | ||
1f6ccccc JK |
645 | zd_usb_reset_rx_idle_timer(usb); |
646 | ||
e85d0918 DD |
647 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { |
648 | /* If there is an old first fragment, we don't care. */ | |
649 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
650 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
651 | spin_lock(&rx->lock); | |
652 | memcpy(rx->fragment, buffer, length); | |
653 | rx->fragment_length = length; | |
654 | spin_unlock(&rx->lock); | |
655 | goto resubmit; | |
656 | } | |
657 | ||
658 | spin_lock(&rx->lock); | |
659 | if (rx->fragment_length > 0) { | |
660 | /* We are on a second fragment, we believe */ | |
661 | ZD_ASSERT(length + rx->fragment_length <= | |
662 | ARRAY_SIZE(rx->fragment)); | |
663 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
664 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
665 | handle_rx_packet(usb, rx->fragment, | |
666 | rx->fragment_length + length); | |
667 | rx->fragment_length = 0; | |
668 | spin_unlock(&rx->lock); | |
669 | } else { | |
670 | spin_unlock(&rx->lock); | |
671 | handle_rx_packet(usb, buffer, length); | |
672 | } | |
673 | ||
674 | resubmit: | |
24d24c62 JK |
675 | r = usb_submit_urb(urb, GFP_ATOMIC); |
676 | if (r) | |
677 | dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r); | |
e85d0918 DD |
678 | } |
679 | ||
459c51ad | 680 | static struct urb *alloc_rx_urb(struct zd_usb *usb) |
e85d0918 DD |
681 | { |
682 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
683 | struct urb *urb; | |
684 | void *buffer; | |
685 | ||
35c3404e | 686 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
687 | if (!urb) |
688 | return NULL; | |
997ea58e DM |
689 | buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
690 | &urb->transfer_dma); | |
e85d0918 DD |
691 | if (!buffer) { |
692 | usb_free_urb(urb); | |
693 | return NULL; | |
694 | } | |
695 | ||
696 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
997ea58e | 697 | buffer, USB_MAX_RX_SIZE, |
e85d0918 DD |
698 | rx_urb_complete, usb); |
699 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
700 | ||
701 | return urb; | |
702 | } | |
703 | ||
459c51ad | 704 | static void free_rx_urb(struct urb *urb) |
e85d0918 DD |
705 | { |
706 | if (!urb) | |
707 | return; | |
997ea58e DM |
708 | usb_free_coherent(urb->dev, urb->transfer_buffer_length, |
709 | urb->transfer_buffer, urb->transfer_dma); | |
e85d0918 DD |
710 | usb_free_urb(urb); |
711 | } | |
712 | ||
1f6ccccc | 713 | static int __zd_usb_enable_rx(struct zd_usb *usb) |
e85d0918 DD |
714 | { |
715 | int i, r; | |
716 | struct zd_usb_rx *rx = &usb->rx; | |
717 | struct urb **urbs; | |
718 | ||
719 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
720 | ||
721 | r = -ENOMEM; | |
459c51ad | 722 | urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
723 | if (!urbs) |
724 | goto error; | |
459c51ad DD |
725 | for (i = 0; i < RX_URBS_COUNT; i++) { |
726 | urbs[i] = alloc_rx_urb(usb); | |
e85d0918 DD |
727 | if (!urbs[i]) |
728 | goto error; | |
729 | } | |
730 | ||
731 | ZD_ASSERT(!irqs_disabled()); | |
732 | spin_lock_irq(&rx->lock); | |
733 | if (rx->urbs) { | |
734 | spin_unlock_irq(&rx->lock); | |
735 | r = 0; | |
736 | goto error; | |
737 | } | |
738 | rx->urbs = urbs; | |
459c51ad | 739 | rx->urbs_count = RX_URBS_COUNT; |
e85d0918 DD |
740 | spin_unlock_irq(&rx->lock); |
741 | ||
459c51ad | 742 | for (i = 0; i < RX_URBS_COUNT; i++) { |
35c3404e | 743 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
744 | if (r) |
745 | goto error_submit; | |
746 | } | |
747 | ||
748 | return 0; | |
749 | error_submit: | |
459c51ad | 750 | for (i = 0; i < RX_URBS_COUNT; i++) { |
e85d0918 DD |
751 | usb_kill_urb(urbs[i]); |
752 | } | |
753 | spin_lock_irq(&rx->lock); | |
754 | rx->urbs = NULL; | |
755 | rx->urbs_count = 0; | |
756 | spin_unlock_irq(&rx->lock); | |
757 | error: | |
758 | if (urbs) { | |
459c51ad DD |
759 | for (i = 0; i < RX_URBS_COUNT; i++) |
760 | free_rx_urb(urbs[i]); | |
e85d0918 DD |
761 | } |
762 | return r; | |
763 | } | |
764 | ||
1f6ccccc JK |
765 | int zd_usb_enable_rx(struct zd_usb *usb) |
766 | { | |
767 | int r; | |
768 | struct zd_usb_rx *rx = &usb->rx; | |
769 | ||
770 | mutex_lock(&rx->setup_mutex); | |
771 | r = __zd_usb_enable_rx(usb); | |
772 | mutex_unlock(&rx->setup_mutex); | |
773 | ||
774 | zd_usb_reset_rx_idle_timer(usb); | |
775 | ||
776 | return r; | |
777 | } | |
778 | ||
779 | static void __zd_usb_disable_rx(struct zd_usb *usb) | |
e85d0918 DD |
780 | { |
781 | int i; | |
782 | unsigned long flags; | |
783 | struct urb **urbs; | |
784 | unsigned int count; | |
785 | struct zd_usb_rx *rx = &usb->rx; | |
786 | ||
787 | spin_lock_irqsave(&rx->lock, flags); | |
788 | urbs = rx->urbs; | |
789 | count = rx->urbs_count; | |
790 | spin_unlock_irqrestore(&rx->lock, flags); | |
791 | if (!urbs) | |
792 | return; | |
793 | ||
794 | for (i = 0; i < count; i++) { | |
795 | usb_kill_urb(urbs[i]); | |
459c51ad | 796 | free_rx_urb(urbs[i]); |
e85d0918 DD |
797 | } |
798 | kfree(urbs); | |
799 | ||
800 | spin_lock_irqsave(&rx->lock, flags); | |
801 | rx->urbs = NULL; | |
802 | rx->urbs_count = 0; | |
803 | spin_unlock_irqrestore(&rx->lock, flags); | |
804 | } | |
805 | ||
1f6ccccc JK |
806 | void zd_usb_disable_rx(struct zd_usb *usb) |
807 | { | |
808 | struct zd_usb_rx *rx = &usb->rx; | |
809 | ||
810 | mutex_lock(&rx->setup_mutex); | |
811 | __zd_usb_disable_rx(usb); | |
812 | mutex_unlock(&rx->setup_mutex); | |
813 | ||
814 | cancel_delayed_work_sync(&rx->idle_work); | |
815 | } | |
816 | ||
817 | static void zd_usb_reset_rx(struct zd_usb *usb) | |
818 | { | |
819 | bool do_reset; | |
820 | struct zd_usb_rx *rx = &usb->rx; | |
821 | unsigned long flags; | |
822 | ||
823 | mutex_lock(&rx->setup_mutex); | |
824 | ||
825 | spin_lock_irqsave(&rx->lock, flags); | |
826 | do_reset = rx->urbs != NULL; | |
827 | spin_unlock_irqrestore(&rx->lock, flags); | |
828 | ||
829 | if (do_reset) { | |
830 | __zd_usb_disable_rx(usb); | |
831 | __zd_usb_enable_rx(usb); | |
832 | } | |
833 | ||
834 | mutex_unlock(&rx->setup_mutex); | |
835 | ||
836 | if (do_reset) | |
837 | zd_usb_reset_rx_idle_timer(usb); | |
838 | } | |
839 | ||
459c51ad DD |
840 | /** |
841 | * zd_usb_disable_tx - disable transmission | |
842 | * @usb: the zd1211rw-private USB structure | |
843 | * | |
844 | * Frees all URBs in the free list and marks the transmission as disabled. | |
845 | */ | |
846 | void zd_usb_disable_tx(struct zd_usb *usb) | |
847 | { | |
848 | struct zd_usb_tx *tx = &usb->tx; | |
849 | unsigned long flags; | |
78fc800f JK |
850 | |
851 | atomic_set(&tx->enabled, 0); | |
852 | ||
853 | /* kill all submitted tx-urbs */ | |
854 | usb_kill_anchored_urbs(&tx->submitted); | |
459c51ad DD |
855 | |
856 | spin_lock_irqsave(&tx->lock, flags); | |
a0fd751f | 857 | WARN_ON(!skb_queue_empty(&tx->submitted_skbs)); |
78fc800f | 858 | WARN_ON(tx->submitted_urbs != 0); |
459c51ad | 859 | tx->submitted_urbs = 0; |
78fc800f JK |
860 | spin_unlock_irqrestore(&tx->lock, flags); |
861 | ||
459c51ad DD |
862 | /* The stopped state is ignored, relying on ieee80211_wake_queues() |
863 | * in a potentionally following zd_usb_enable_tx(). | |
864 | */ | |
459c51ad DD |
865 | } |
866 | ||
867 | /** | |
868 | * zd_usb_enable_tx - enables transmission | |
869 | * @usb: a &struct zd_usb pointer | |
870 | * | |
871 | * This function enables transmission and prepares the &zd_usb_tx data | |
872 | * structure. | |
873 | */ | |
874 | void zd_usb_enable_tx(struct zd_usb *usb) | |
875 | { | |
876 | unsigned long flags; | |
877 | struct zd_usb_tx *tx = &usb->tx; | |
878 | ||
879 | spin_lock_irqsave(&tx->lock, flags); | |
78fc800f | 880 | atomic_set(&tx->enabled, 1); |
459c51ad DD |
881 | tx->submitted_urbs = 0; |
882 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
883 | tx->stopped = 0; | |
884 | spin_unlock_irqrestore(&tx->lock, flags); | |
885 | } | |
886 | ||
459c51ad DD |
887 | static void tx_dec_submitted_urbs(struct zd_usb *usb) |
888 | { | |
889 | struct zd_usb_tx *tx = &usb->tx; | |
890 | unsigned long flags; | |
891 | ||
892 | spin_lock_irqsave(&tx->lock, flags); | |
893 | --tx->submitted_urbs; | |
894 | if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) { | |
895 | ieee80211_wake_queues(zd_usb_to_hw(usb)); | |
896 | tx->stopped = 0; | |
897 | } | |
898 | spin_unlock_irqrestore(&tx->lock, flags); | |
899 | } | |
900 | ||
901 | static void tx_inc_submitted_urbs(struct zd_usb *usb) | |
902 | { | |
903 | struct zd_usb_tx *tx = &usb->tx; | |
904 | unsigned long flags; | |
905 | ||
906 | spin_lock_irqsave(&tx->lock, flags); | |
907 | ++tx->submitted_urbs; | |
908 | if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) { | |
909 | ieee80211_stop_queues(zd_usb_to_hw(usb)); | |
910 | tx->stopped = 1; | |
911 | } | |
912 | spin_unlock_irqrestore(&tx->lock, flags); | |
913 | } | |
914 | ||
915 | /** | |
916 | * tx_urb_complete - completes the execution of an URB | |
917 | * @urb: a URB | |
918 | * | |
919 | * This function is called if the URB has been transferred to a device or an | |
920 | * error has happened. | |
921 | */ | |
7d12e780 | 922 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
923 | { |
924 | int r; | |
459c51ad | 925 | struct sk_buff *skb; |
e039fa4a | 926 | struct ieee80211_tx_info *info; |
459c51ad | 927 | struct zd_usb *usb; |
78fc800f JK |
928 | struct zd_usb_tx *tx; |
929 | ||
930 | skb = (struct sk_buff *)urb->context; | |
931 | info = IEEE80211_SKB_CB(skb); | |
932 | /* | |
933 | * grab 'usb' pointer before handing off the skb (since | |
934 | * it might be freed by zd_mac_tx_to_dev or mac80211) | |
935 | */ | |
936 | usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb; | |
937 | tx = &usb->tx; | |
e85d0918 DD |
938 | |
939 | switch (urb->status) { | |
940 | case 0: | |
941 | break; | |
942 | case -ESHUTDOWN: | |
943 | case -EINVAL: | |
944 | case -ENODEV: | |
945 | case -ENOENT: | |
946 | case -ECONNRESET: | |
b312d799 | 947 | case -EPIPE: |
e85d0918 DD |
948 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
949 | break; | |
e85d0918 DD |
950 | default: |
951 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
952 | goto resubmit; | |
953 | } | |
954 | free_urb: | |
a0fd751f | 955 | skb_unlink(skb, &usb->tx.submitted_skbs); |
dbabad0c | 956 | zd_mac_tx_to_dev(skb, urb->status); |
78fc800f | 957 | usb_free_urb(urb); |
459c51ad | 958 | tx_dec_submitted_urbs(usb); |
e85d0918 DD |
959 | return; |
960 | resubmit: | |
78fc800f | 961 | usb_anchor_urb(urb, &tx->submitted); |
e85d0918 DD |
962 | r = usb_submit_urb(urb, GFP_ATOMIC); |
963 | if (r) { | |
78fc800f | 964 | usb_unanchor_urb(urb); |
e85d0918 DD |
965 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); |
966 | goto free_urb; | |
967 | } | |
968 | } | |
969 | ||
459c51ad DD |
970 | /** |
971 | * zd_usb_tx: initiates transfer of a frame of the device | |
972 | * | |
973 | * @usb: the zd1211rw-private USB structure | |
974 | * @skb: a &struct sk_buff pointer | |
975 | * | |
976 | * This function tranmits a frame to the device. It doesn't wait for | |
977 | * completion. The frame must contain the control set and have all the | |
978 | * control set information available. | |
979 | * | |
980 | * The function returns 0 if the transfer has been successfully initiated. | |
e85d0918 | 981 | */ |
459c51ad | 982 | int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb) |
e85d0918 DD |
983 | { |
984 | int r; | |
a0fd751f | 985 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 DD |
986 | struct usb_device *udev = zd_usb_to_usbdev(usb); |
987 | struct urb *urb; | |
78fc800f | 988 | struct zd_usb_tx *tx = &usb->tx; |
e85d0918 | 989 | |
78fc800f JK |
990 | if (!atomic_read(&tx->enabled)) { |
991 | r = -ENOENT; | |
992 | goto out; | |
993 | } | |
994 | ||
995 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
e85d0918 DD |
996 | if (!urb) { |
997 | r = -ENOMEM; | |
998 | goto out; | |
999 | } | |
1000 | ||
e85d0918 | 1001 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
459c51ad | 1002 | skb->data, skb->len, tx_urb_complete, skb); |
e85d0918 | 1003 | |
a0fd751f JK |
1004 | info->rate_driver_data[1] = (void *)jiffies; |
1005 | skb_queue_tail(&tx->submitted_skbs, skb); | |
78fc800f | 1006 | usb_anchor_urb(urb, &tx->submitted); |
a0fd751f | 1007 | |
e85d0918 | 1008 | r = usb_submit_urb(urb, GFP_ATOMIC); |
78fc800f | 1009 | if (r) { |
24d24c62 | 1010 | dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r); |
78fc800f | 1011 | usb_unanchor_urb(urb); |
a0fd751f | 1012 | skb_unlink(skb, &tx->submitted_skbs); |
e85d0918 | 1013 | goto error; |
78fc800f | 1014 | } |
459c51ad | 1015 | tx_inc_submitted_urbs(usb); |
e85d0918 DD |
1016 | return 0; |
1017 | error: | |
78fc800f | 1018 | usb_free_urb(urb); |
e85d0918 DD |
1019 | out: |
1020 | return r; | |
1021 | } | |
1022 | ||
a0fd751f JK |
1023 | static bool zd_tx_timeout(struct zd_usb *usb) |
1024 | { | |
1025 | struct zd_usb_tx *tx = &usb->tx; | |
1026 | struct sk_buff_head *q = &tx->submitted_skbs; | |
1027 | struct sk_buff *skb, *skbnext; | |
1028 | struct ieee80211_tx_info *info; | |
1029 | unsigned long flags, trans_start; | |
1030 | bool have_timedout = false; | |
1031 | ||
1032 | spin_lock_irqsave(&q->lock, flags); | |
1033 | skb_queue_walk_safe(q, skb, skbnext) { | |
1034 | info = IEEE80211_SKB_CB(skb); | |
1035 | trans_start = (unsigned long)info->rate_driver_data[1]; | |
1036 | ||
1037 | if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) { | |
1038 | have_timedout = true; | |
1039 | break; | |
1040 | } | |
1041 | } | |
1042 | spin_unlock_irqrestore(&q->lock, flags); | |
1043 | ||
1044 | return have_timedout; | |
1045 | } | |
1046 | ||
1047 | static void zd_tx_watchdog_handler(struct work_struct *work) | |
1048 | { | |
1049 | struct zd_usb *usb = | |
1050 | container_of(work, struct zd_usb, tx.watchdog_work.work); | |
1051 | struct zd_usb_tx *tx = &usb->tx; | |
1052 | ||
1053 | if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled) | |
1054 | goto out; | |
1055 | if (!zd_tx_timeout(usb)) | |
1056 | goto out; | |
1057 | ||
1058 | /* TX halted, try reset */ | |
1059 | dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device..."); | |
1060 | ||
1061 | usb_queue_reset_device(usb->intf); | |
1062 | ||
1063 | /* reset will stop this worker, don't rearm */ | |
1064 | return; | |
1065 | out: | |
1066 | queue_delayed_work(zd_workqueue, &tx->watchdog_work, | |
1067 | ZD_TX_WATCHDOG_INTERVAL); | |
1068 | } | |
1069 | ||
1070 | void zd_tx_watchdog_enable(struct zd_usb *usb) | |
1071 | { | |
1072 | struct zd_usb_tx *tx = &usb->tx; | |
1073 | ||
1074 | if (!tx->watchdog_enabled) { | |
1075 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1076 | queue_delayed_work(zd_workqueue, &tx->watchdog_work, | |
1077 | ZD_TX_WATCHDOG_INTERVAL); | |
1078 | tx->watchdog_enabled = 1; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | void zd_tx_watchdog_disable(struct zd_usb *usb) | |
1083 | { | |
1084 | struct zd_usb_tx *tx = &usb->tx; | |
1085 | ||
1086 | if (tx->watchdog_enabled) { | |
1087 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1088 | tx->watchdog_enabled = 0; | |
1089 | cancel_delayed_work_sync(&tx->watchdog_work); | |
1090 | } | |
1091 | } | |
1092 | ||
1f6ccccc JK |
1093 | static void zd_rx_idle_timer_handler(struct work_struct *work) |
1094 | { | |
1095 | struct zd_usb *usb = | |
1096 | container_of(work, struct zd_usb, rx.idle_work.work); | |
1097 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1098 | ||
1099 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) | |
1100 | return; | |
1101 | ||
1102 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1103 | ||
1104 | /* 30 seconds since last rx, reset rx */ | |
1105 | zd_usb_reset_rx(usb); | |
1106 | } | |
1107 | ||
1108 | void zd_usb_reset_rx_idle_timer(struct zd_usb *usb) | |
1109 | { | |
1110 | struct zd_usb_rx *rx = &usb->rx; | |
1111 | ||
1112 | cancel_delayed_work(&rx->idle_work); | |
1113 | queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL); | |
1114 | } | |
1115 | ||
e85d0918 DD |
1116 | static inline void init_usb_interrupt(struct zd_usb *usb) |
1117 | { | |
1118 | struct zd_usb_interrupt *intr = &usb->intr; | |
1119 | ||
1120 | spin_lock_init(&intr->lock); | |
1121 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
1122 | init_completion(&intr->read_regs.completion); | |
0ce34bc8 | 1123 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
1124 | } |
1125 | ||
1126 | static inline void init_usb_rx(struct zd_usb *usb) | |
1127 | { | |
1128 | struct zd_usb_rx *rx = &usb->rx; | |
1129 | spin_lock_init(&rx->lock); | |
1f6ccccc | 1130 | mutex_init(&rx->setup_mutex); |
e85d0918 DD |
1131 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { |
1132 | rx->usb_packet_size = 512; | |
1133 | } else { | |
1134 | rx->usb_packet_size = 64; | |
1135 | } | |
1136 | ZD_ASSERT(rx->fragment_length == 0); | |
1f6ccccc | 1137 | INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler); |
e85d0918 DD |
1138 | } |
1139 | ||
1140 | static inline void init_usb_tx(struct zd_usb *usb) | |
1141 | { | |
459c51ad DD |
1142 | struct zd_usb_tx *tx = &usb->tx; |
1143 | spin_lock_init(&tx->lock); | |
78fc800f | 1144 | atomic_set(&tx->enabled, 0); |
459c51ad | 1145 | tx->stopped = 0; |
a0fd751f | 1146 | skb_queue_head_init(&tx->submitted_skbs); |
78fc800f | 1147 | init_usb_anchor(&tx->submitted); |
459c51ad | 1148 | tx->submitted_urbs = 0; |
a0fd751f JK |
1149 | tx->watchdog_enabled = 0; |
1150 | INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler); | |
e85d0918 DD |
1151 | } |
1152 | ||
459c51ad | 1153 | void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw, |
e85d0918 DD |
1154 | struct usb_interface *intf) |
1155 | { | |
1156 | memset(usb, 0, sizeof(*usb)); | |
1157 | usb->intf = usb_get_intf(intf); | |
459c51ad | 1158 | usb_set_intfdata(usb->intf, hw); |
eefdbec1 | 1159 | init_usb_anchor(&usb->submitted_cmds); |
e85d0918 DD |
1160 | init_usb_interrupt(usb); |
1161 | init_usb_tx(usb); | |
1162 | init_usb_rx(usb); | |
1163 | } | |
1164 | ||
e85d0918 DD |
1165 | void zd_usb_clear(struct zd_usb *usb) |
1166 | { | |
1167 | usb_set_intfdata(usb->intf, NULL); | |
1168 | usb_put_intf(usb->intf); | |
c48cf125 | 1169 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
1170 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
1171 | } | |
1172 | ||
1173 | static const char *speed(enum usb_device_speed speed) | |
1174 | { | |
1175 | switch (speed) { | |
1176 | case USB_SPEED_LOW: | |
1177 | return "low"; | |
1178 | case USB_SPEED_FULL: | |
1179 | return "full"; | |
1180 | case USB_SPEED_HIGH: | |
1181 | return "high"; | |
1182 | default: | |
1183 | return "unknown speed"; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
1188 | { | |
1189 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
1190 | le16_to_cpu(udev->descriptor.idVendor), | |
1191 | le16_to_cpu(udev->descriptor.idProduct), | |
1192 | get_bcdDevice(udev), | |
1193 | speed(udev->speed)); | |
1194 | } | |
1195 | ||
1196 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
1197 | { | |
1198 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
1199 | return scnprint_id(udev, buffer, size); | |
1200 | } | |
1201 | ||
1202 | #ifdef DEBUG | |
1203 | static void print_id(struct usb_device *udev) | |
1204 | { | |
1205 | char buffer[40]; | |
1206 | ||
1207 | scnprint_id(udev, buffer, sizeof(buffer)); | |
1208 | buffer[sizeof(buffer)-1] = 0; | |
1209 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
1210 | } | |
1211 | #else | |
1212 | #define print_id(udev) do { } while (0) | |
1213 | #endif | |
1214 | ||
a1030e92 DD |
1215 | static int eject_installer(struct usb_interface *intf) |
1216 | { | |
1217 | struct usb_device *udev = interface_to_usbdev(intf); | |
1218 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
1219 | struct usb_endpoint_descriptor *endpoint; | |
1220 | unsigned char *cmd; | |
1221 | u8 bulk_out_ep; | |
1222 | int r; | |
1223 | ||
1224 | /* Find bulk out endpoint */ | |
11466f13 SS |
1225 | for (r = 1; r >= 0; r--) { |
1226 | endpoint = &iface_desc->endpoint[r].desc; | |
1227 | if (usb_endpoint_dir_out(endpoint) && | |
1228 | usb_endpoint_xfer_bulk(endpoint)) { | |
1229 | bulk_out_ep = endpoint->bEndpointAddress; | |
1230 | break; | |
1231 | } | |
1232 | } | |
1233 | if (r == -1) { | |
a1030e92 DD |
1234 | dev_err(&udev->dev, |
1235 | "zd1211rw: Could not find bulk out endpoint\n"); | |
1236 | return -ENODEV; | |
1237 | } | |
1238 | ||
1239 | cmd = kzalloc(31, GFP_KERNEL); | |
1240 | if (cmd == NULL) | |
1241 | return -ENODEV; | |
1242 | ||
1243 | /* USB bulk command block */ | |
1244 | cmd[0] = 0x55; /* bulk command signature */ | |
1245 | cmd[1] = 0x53; /* bulk command signature */ | |
1246 | cmd[2] = 0x42; /* bulk command signature */ | |
1247 | cmd[3] = 0x43; /* bulk command signature */ | |
1248 | cmd[14] = 6; /* command length */ | |
1249 | ||
1250 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
1251 | cmd[19] = 0x2; /* eject disc */ | |
1252 | ||
1253 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
1254 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
1255 | cmd, 31, NULL, 2000); | |
1256 | kfree(cmd); | |
1257 | if (r) | |
1258 | return r; | |
1259 | ||
1260 | /* At this point, the device disconnects and reconnects with the real | |
1261 | * ID numbers. */ | |
1262 | ||
1263 | usb_set_intfdata(intf, NULL); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
74553aed DD |
1267 | int zd_usb_init_hw(struct zd_usb *usb) |
1268 | { | |
1269 | int r; | |
1270 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1271 | ||
1272 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1273 | ||
1274 | r = upload_firmware(usb); | |
1275 | if (r) { | |
1276 | dev_err(zd_usb_dev(usb), | |
1277 | "couldn't load firmware. Error number %d\n", r); | |
1278 | return r; | |
1279 | } | |
1280 | ||
1281 | r = usb_reset_configuration(zd_usb_to_usbdev(usb)); | |
1282 | if (r) { | |
1283 | dev_dbg_f(zd_usb_dev(usb), | |
1284 | "couldn't reset configuration. Error number %d\n", r); | |
1285 | return r; | |
1286 | } | |
1287 | ||
459c51ad | 1288 | r = zd_mac_init_hw(mac->hw); |
74553aed DD |
1289 | if (r) { |
1290 | dev_dbg_f(zd_usb_dev(usb), | |
1291 | "couldn't initialize mac. Error number %d\n", r); | |
1292 | return r; | |
1293 | } | |
1294 | ||
1295 | usb->initialized = 1; | |
1296 | return 0; | |
1297 | } | |
1298 | ||
e85d0918 DD |
1299 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
1300 | { | |
1301 | int r; | |
1302 | struct usb_device *udev = interface_to_usbdev(intf); | |
459c51ad DD |
1303 | struct zd_usb *usb; |
1304 | struct ieee80211_hw *hw = NULL; | |
e85d0918 DD |
1305 | |
1306 | print_id(udev); | |
1307 | ||
a1030e92 DD |
1308 | if (id->driver_info & DEVICE_INSTALLER) |
1309 | return eject_installer(intf); | |
1310 | ||
e85d0918 DD |
1311 | switch (udev->speed) { |
1312 | case USB_SPEED_LOW: | |
1313 | case USB_SPEED_FULL: | |
1314 | case USB_SPEED_HIGH: | |
1315 | break; | |
1316 | default: | |
1317 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
1318 | r = -ENODEV; | |
1319 | goto error; | |
1320 | } | |
1321 | ||
459c51ad DD |
1322 | r = usb_reset_device(udev); |
1323 | if (r) { | |
1324 | dev_err(&intf->dev, | |
1325 | "couldn't reset usb device. Error number %d\n", r); | |
1326 | goto error; | |
1327 | } | |
6e3632f6 | 1328 | |
459c51ad DD |
1329 | hw = zd_mac_alloc_hw(intf); |
1330 | if (hw == NULL) { | |
e85d0918 DD |
1331 | r = -ENOMEM; |
1332 | goto error; | |
1333 | } | |
1334 | ||
459c51ad | 1335 | usb = &zd_hw_mac(hw)->chip.usb; |
74553aed | 1336 | usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
e85d0918 | 1337 | |
459c51ad | 1338 | r = zd_mac_preinit_hw(hw); |
e85d0918 DD |
1339 | if (r) { |
1340 | dev_dbg_f(&intf->dev, | |
1341 | "couldn't initialize mac. Error number %d\n", r); | |
1342 | goto error; | |
1343 | } | |
1344 | ||
459c51ad | 1345 | r = ieee80211_register_hw(hw); |
e85d0918 DD |
1346 | if (r) { |
1347 | dev_dbg_f(&intf->dev, | |
459c51ad | 1348 | "couldn't register device. Error number %d\n", r); |
e85d0918 DD |
1349 | goto error; |
1350 | } | |
1351 | ||
1352 | dev_dbg_f(&intf->dev, "successful\n"); | |
459c51ad | 1353 | dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy)); |
e85d0918 DD |
1354 | return 0; |
1355 | error: | |
1356 | usb_reset_device(interface_to_usbdev(intf)); | |
459c51ad DD |
1357 | if (hw) { |
1358 | zd_mac_clear(zd_hw_mac(hw)); | |
1359 | ieee80211_free_hw(hw); | |
1360 | } | |
e85d0918 DD |
1361 | return r; |
1362 | } | |
1363 | ||
1364 | static void disconnect(struct usb_interface *intf) | |
1365 | { | |
459c51ad | 1366 | struct ieee80211_hw *hw = zd_intf_to_hw(intf); |
e0579d57 MP |
1367 | struct zd_mac *mac; |
1368 | struct zd_usb *usb; | |
e85d0918 | 1369 | |
a1030e92 DD |
1370 | /* Either something really bad happened, or we're just dealing with |
1371 | * a DEVICE_INSTALLER. */ | |
459c51ad | 1372 | if (hw == NULL) |
a1030e92 DD |
1373 | return; |
1374 | ||
459c51ad | 1375 | mac = zd_hw_mac(hw); |
e0579d57 MP |
1376 | usb = &mac->chip.usb; |
1377 | ||
e85d0918 DD |
1378 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1379 | ||
459c51ad | 1380 | ieee80211_unregister_hw(hw); |
e85d0918 DD |
1381 | |
1382 | /* Just in case something has gone wrong! */ | |
78fc800f | 1383 | zd_usb_disable_tx(usb); |
e85d0918 DD |
1384 | zd_usb_disable_rx(usb); |
1385 | zd_usb_disable_int(usb); | |
1386 | ||
1387 | /* If the disconnect has been caused by a removal of the | |
1388 | * driver module, the reset allows reloading of the driver. If the | |
1389 | * reset will not be executed here, the upload of the firmware in the | |
1390 | * probe function caused by the reloading of the driver will fail. | |
1391 | */ | |
1392 | usb_reset_device(interface_to_usbdev(intf)); | |
1393 | ||
459c51ad DD |
1394 | zd_mac_clear(mac); |
1395 | ieee80211_free_hw(hw); | |
e85d0918 DD |
1396 | dev_dbg(&intf->dev, "disconnected\n"); |
1397 | } | |
1398 | ||
a0fd751f JK |
1399 | static void zd_usb_resume(struct zd_usb *usb) |
1400 | { | |
1401 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
1402 | int r; | |
1403 | ||
1404 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1405 | ||
1406 | r = zd_op_start(zd_usb_to_hw(usb)); | |
1407 | if (r < 0) { | |
1408 | dev_warn(zd_usb_dev(usb), "Device resume failed " | |
1409 | "with error code %d. Retrying...\n", r); | |
1410 | if (usb->was_running) | |
1411 | set_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
1412 | usb_queue_reset_device(usb->intf); | |
1413 | return; | |
1414 | } | |
1415 | ||
1416 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) { | |
1417 | r = zd_restore_settings(mac); | |
1418 | if (r < 0) { | |
1419 | dev_dbg(zd_usb_dev(usb), | |
1420 | "failed to restore settings, %d\n", r); | |
1421 | return; | |
1422 | } | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | static void zd_usb_stop(struct zd_usb *usb) | |
1427 | { | |
1428 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
1429 | ||
1430 | zd_op_stop(zd_usb_to_hw(usb)); | |
1431 | ||
1432 | zd_usb_disable_tx(usb); | |
1433 | zd_usb_disable_rx(usb); | |
1434 | zd_usb_disable_int(usb); | |
1435 | ||
1436 | usb->initialized = 0; | |
1437 | } | |
1438 | ||
1439 | static int pre_reset(struct usb_interface *intf) | |
1440 | { | |
1441 | struct ieee80211_hw *hw = usb_get_intfdata(intf); | |
1442 | struct zd_mac *mac; | |
1443 | struct zd_usb *usb; | |
1444 | ||
1445 | if (!hw || intf->condition != USB_INTERFACE_BOUND) | |
1446 | return 0; | |
1447 | ||
1448 | mac = zd_hw_mac(hw); | |
1449 | usb = &mac->chip.usb; | |
1450 | ||
1451 | usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
1452 | ||
1453 | zd_usb_stop(usb); | |
1454 | ||
1455 | mutex_lock(&mac->chip.mutex); | |
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | static int post_reset(struct usb_interface *intf) | |
1460 | { | |
1461 | struct ieee80211_hw *hw = usb_get_intfdata(intf); | |
1462 | struct zd_mac *mac; | |
1463 | struct zd_usb *usb; | |
1464 | ||
1465 | if (!hw || intf->condition != USB_INTERFACE_BOUND) | |
1466 | return 0; | |
1467 | ||
1468 | mac = zd_hw_mac(hw); | |
1469 | usb = &mac->chip.usb; | |
1470 | ||
1471 | mutex_unlock(&mac->chip.mutex); | |
1472 | ||
1473 | if (usb->was_running) | |
1474 | zd_usb_resume(usb); | |
1475 | return 0; | |
1476 | } | |
1477 | ||
e85d0918 | 1478 | static struct usb_driver driver = { |
459c51ad | 1479 | .name = KBUILD_MODNAME, |
e85d0918 DD |
1480 | .id_table = usb_ids, |
1481 | .probe = probe, | |
1482 | .disconnect = disconnect, | |
a0fd751f JK |
1483 | .pre_reset = pre_reset, |
1484 | .post_reset = post_reset, | |
e85d0918 DD |
1485 | }; |
1486 | ||
bc5f06a8 UK |
1487 | struct workqueue_struct *zd_workqueue; |
1488 | ||
e85d0918 DD |
1489 | static int __init usb_init(void) |
1490 | { | |
1491 | int r; | |
1492 | ||
741fec53 | 1493 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1494 | |
bc5f06a8 UK |
1495 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1496 | if (zd_workqueue == NULL) { | |
741fec53 | 1497 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1498 | return -ENOMEM; |
1499 | } | |
1500 | ||
e85d0918 DD |
1501 | r = usb_register(&driver); |
1502 | if (r) { | |
192b775c | 1503 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1504 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1505 | driver.name, r); | |
e85d0918 DD |
1506 | return r; |
1507 | } | |
1508 | ||
741fec53 | 1509 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1510 | return 0; |
1511 | } | |
1512 | ||
1513 | static void __exit usb_exit(void) | |
1514 | { | |
741fec53 | 1515 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1516 | usb_deregister(&driver); |
bc5f06a8 | 1517 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1518 | } |
1519 | ||
1520 | module_init(usb_init); | |
1521 | module_exit(usb_exit); | |
1522 | ||
1523 | static int usb_int_regs_length(unsigned int count) | |
1524 | { | |
1525 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1526 | } | |
1527 | ||
1528 | static void prepare_read_regs_int(struct zd_usb *usb) | |
1529 | { | |
1530 | struct zd_usb_interrupt *intr = &usb->intr; | |
1531 | ||
a68077de | 1532 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1533 | intr->read_regs_enabled = 1; |
1534 | INIT_COMPLETION(intr->read_regs.completion); | |
a68077de UK |
1535 | spin_unlock_irq(&intr->lock); |
1536 | } | |
1537 | ||
1538 | static void disable_read_regs_int(struct zd_usb *usb) | |
1539 | { | |
1540 | struct zd_usb_interrupt *intr = &usb->intr; | |
1541 | ||
1542 | spin_lock_irq(&intr->lock); | |
1543 | intr->read_regs_enabled = 0; | |
1544 | spin_unlock_irq(&intr->lock); | |
e85d0918 DD |
1545 | } |
1546 | ||
1547 | static int get_results(struct zd_usb *usb, u16 *values, | |
1548 | struct usb_req_read_regs *req, unsigned int count) | |
1549 | { | |
1550 | int r; | |
1551 | int i; | |
1552 | struct zd_usb_interrupt *intr = &usb->intr; | |
1553 | struct read_regs_int *rr = &intr->read_regs; | |
1554 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1555 | ||
a68077de | 1556 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1557 | |
1558 | r = -EIO; | |
1559 | /* The created block size seems to be larger than expected. | |
1560 | * However results appear to be correct. | |
1561 | */ | |
1562 | if (rr->length < usb_int_regs_length(count)) { | |
1563 | dev_dbg_f(zd_usb_dev(usb), | |
1564 | "error: actual length %d less than expected %d\n", | |
1565 | rr->length, usb_int_regs_length(count)); | |
1566 | goto error_unlock; | |
1567 | } | |
1568 | if (rr->length > sizeof(rr->buffer)) { | |
1569 | dev_dbg_f(zd_usb_dev(usb), | |
1570 | "error: actual length %d exceeds buffer size %zu\n", | |
1571 | rr->length, sizeof(rr->buffer)); | |
1572 | goto error_unlock; | |
1573 | } | |
1574 | ||
1575 | for (i = 0; i < count; i++) { | |
1576 | struct reg_data *rd = ®s->regs[i]; | |
1577 | if (rd->addr != req->addr[i]) { | |
1578 | dev_dbg_f(zd_usb_dev(usb), | |
1579 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1580 | le16_to_cpu(rd->addr), | |
1581 | le16_to_cpu(req->addr[i])); | |
1582 | goto error_unlock; | |
1583 | } | |
1584 | values[i] = le16_to_cpu(rd->value); | |
1585 | } | |
1586 | ||
1587 | r = 0; | |
1588 | error_unlock: | |
a68077de | 1589 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1590 | return r; |
1591 | } | |
1592 | ||
1593 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1594 | const zd_addr_t *addresses, unsigned int count) | |
1595 | { | |
1596 | int r; | |
1597 | int i, req_len, actual_req_len; | |
1598 | struct usb_device *udev; | |
1599 | struct usb_req_read_regs *req = NULL; | |
1600 | unsigned long timeout; | |
1601 | ||
1602 | if (count < 1) { | |
1603 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1604 | return -EINVAL; | |
1605 | } | |
1606 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1607 | dev_dbg_f(zd_usb_dev(usb), | |
1608 | "error: count %u exceeds possible max %u\n", | |
1609 | count, USB_MAX_IOREAD16_COUNT); | |
1610 | return -EINVAL; | |
1611 | } | |
1612 | if (in_atomic()) { | |
1613 | dev_dbg_f(zd_usb_dev(usb), | |
1614 | "error: io in atomic context not supported\n"); | |
1615 | return -EWOULDBLOCK; | |
1616 | } | |
1617 | if (!usb_int_enabled(usb)) { | |
9bca0c3b | 1618 | dev_dbg_f(zd_usb_dev(usb), |
e85d0918 DD |
1619 | "error: usb interrupt not enabled\n"); |
1620 | return -EWOULDBLOCK; | |
1621 | } | |
1622 | ||
9bca0c3b JK |
1623 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); |
1624 | BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT * | |
1625 | sizeof(__le16) > sizeof(usb->req_buf)); | |
1626 | BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) > | |
1627 | sizeof(usb->req_buf)); | |
1628 | ||
e85d0918 | 1629 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); |
9bca0c3b JK |
1630 | req = (void *)usb->req_buf; |
1631 | ||
e85d0918 DD |
1632 | req->id = cpu_to_le16(USB_REQ_READ_REGS); |
1633 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1634 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 DD |
1635 | |
1636 | udev = zd_usb_to_usbdev(usb); | |
1637 | prepare_read_regs_int(usb); | |
37939810 JK |
1638 | r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT), |
1639 | req, req_len, &actual_req_len, 50 /* ms */); | |
e85d0918 DD |
1640 | if (r) { |
1641 | dev_dbg_f(zd_usb_dev(usb), | |
37939810 | 1642 | "error in usb_interrupt_msg(). Error number %d\n", r); |
e85d0918 DD |
1643 | goto error; |
1644 | } | |
1645 | if (req_len != actual_req_len) { | |
37939810 | 1646 | dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()\n" |
e85d0918 DD |
1647 | " req_len %d != actual_req_len %d\n", |
1648 | req_len, actual_req_len); | |
1649 | r = -EIO; | |
1650 | goto error; | |
1651 | } | |
1652 | ||
1653 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
8f2d8f86 | 1654 | msecs_to_jiffies(50)); |
e85d0918 DD |
1655 | if (!timeout) { |
1656 | disable_read_regs_int(usb); | |
1657 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1658 | r = -ETIMEDOUT; | |
1659 | goto error; | |
1660 | } | |
1661 | ||
1662 | r = get_results(usb, values, req, count); | |
1663 | error: | |
e85d0918 DD |
1664 | return r; |
1665 | } | |
1666 | ||
eefdbec1 JK |
1667 | static void iowrite16v_urb_complete(struct urb *urb) |
1668 | { | |
1669 | struct zd_usb *usb = urb->context; | |
1670 | ||
1671 | if (urb->status && !usb->cmd_error) | |
1672 | usb->cmd_error = urb->status; | |
1673 | } | |
1674 | ||
1675 | static int zd_submit_waiting_urb(struct zd_usb *usb, bool last) | |
1676 | { | |
8662b251 | 1677 | int r = 0; |
eefdbec1 JK |
1678 | struct urb *urb = usb->urb_async_waiting; |
1679 | ||
1680 | if (!urb) | |
1681 | return 0; | |
1682 | ||
1683 | usb->urb_async_waiting = NULL; | |
1684 | ||
1685 | if (!last) | |
1686 | urb->transfer_flags |= URB_NO_INTERRUPT; | |
1687 | ||
1688 | usb_anchor_urb(urb, &usb->submitted_cmds); | |
1689 | r = usb_submit_urb(urb, GFP_KERNEL); | |
1690 | if (r) { | |
1691 | usb_unanchor_urb(urb); | |
1692 | dev_dbg_f(zd_usb_dev(usb), | |
1693 | "error in usb_submit_urb(). Error number %d\n", r); | |
1694 | goto error; | |
1695 | } | |
1696 | ||
1697 | /* fall-through with r == 0 */ | |
1698 | error: | |
1699 | usb_free_urb(urb); | |
1700 | return r; | |
1701 | } | |
1702 | ||
8662b251 | 1703 | void zd_usb_iowrite16v_async_start(struct zd_usb *usb) |
eefdbec1 JK |
1704 | { |
1705 | ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds)); | |
1706 | ZD_ASSERT(usb->urb_async_waiting == NULL); | |
1707 | ZD_ASSERT(!usb->in_async); | |
1708 | ||
1709 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); | |
1710 | ||
1711 | usb->in_async = 1; | |
1712 | usb->cmd_error = 0; | |
1713 | usb->urb_async_waiting = NULL; | |
1714 | } | |
1715 | ||
8662b251 | 1716 | int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout) |
eefdbec1 JK |
1717 | { |
1718 | int r; | |
1719 | ||
1720 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); | |
1721 | ZD_ASSERT(usb->in_async); | |
1722 | ||
1723 | /* Submit last iowrite16v URB */ | |
1724 | r = zd_submit_waiting_urb(usb, true); | |
1725 | if (r) { | |
1726 | dev_dbg_f(zd_usb_dev(usb), | |
1727 | "error in zd_submit_waiting_usb(). " | |
1728 | "Error number %d\n", r); | |
1729 | ||
1730 | usb_kill_anchored_urbs(&usb->submitted_cmds); | |
1731 | goto error; | |
1732 | } | |
1733 | ||
1734 | if (timeout) | |
1735 | timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds, | |
1736 | timeout); | |
1737 | if (!timeout) { | |
1738 | usb_kill_anchored_urbs(&usb->submitted_cmds); | |
1739 | if (usb->cmd_error == -ENOENT) { | |
1740 | dev_dbg_f(zd_usb_dev(usb), "timed out"); | |
1741 | r = -ETIMEDOUT; | |
1742 | goto error; | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | r = usb->cmd_error; | |
1747 | error: | |
1748 | usb->in_async = 0; | |
1749 | return r; | |
1750 | } | |
1751 | ||
8662b251 JK |
1752 | int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, |
1753 | unsigned int count) | |
e85d0918 DD |
1754 | { |
1755 | int r; | |
1756 | struct usb_device *udev; | |
1757 | struct usb_req_write_regs *req = NULL; | |
eefdbec1 JK |
1758 | int i, req_len; |
1759 | struct urb *urb; | |
1760 | struct usb_host_endpoint *ep; | |
1761 | ||
1762 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); | |
1763 | ZD_ASSERT(usb->in_async); | |
e85d0918 DD |
1764 | |
1765 | if (count == 0) | |
1766 | return 0; | |
1767 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1768 | dev_dbg_f(zd_usb_dev(usb), | |
1769 | "error: count %u exceeds possible max %u\n", | |
1770 | count, USB_MAX_IOWRITE16_COUNT); | |
1771 | return -EINVAL; | |
1772 | } | |
1773 | if (in_atomic()) { | |
1774 | dev_dbg_f(zd_usb_dev(usb), | |
1775 | "error: io in atomic context not supported\n"); | |
1776 | return -EWOULDBLOCK; | |
1777 | } | |
1778 | ||
eefdbec1 JK |
1779 | udev = zd_usb_to_usbdev(usb); |
1780 | ||
1781 | ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT)); | |
1782 | if (!ep) | |
1783 | return -ENOENT; | |
1784 | ||
1785 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
1786 | if (!urb) | |
1787 | return -ENOMEM; | |
9bca0c3b | 1788 | |
e85d0918 DD |
1789 | req_len = sizeof(struct usb_req_write_regs) + |
1790 | count * sizeof(struct reg_data); | |
eefdbec1 JK |
1791 | req = kmalloc(req_len, GFP_KERNEL); |
1792 | if (!req) { | |
1793 | r = -ENOMEM; | |
1794 | goto error; | |
1795 | } | |
e85d0918 DD |
1796 | |
1797 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1798 | for (i = 0; i < count; i++) { | |
1799 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1800 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1801 | rw->value = cpu_to_le16(ioreqs[i].value); |
1802 | } | |
1803 | ||
eefdbec1 JK |
1804 | usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT), |
1805 | req, req_len, iowrite16v_urb_complete, usb, | |
1806 | ep->desc.bInterval); | |
1807 | urb->transfer_flags |= URB_FREE_BUFFER | URB_SHORT_NOT_OK; | |
1808 | ||
1809 | /* Submit previous URB */ | |
1810 | r = zd_submit_waiting_urb(usb, false); | |
e85d0918 DD |
1811 | if (r) { |
1812 | dev_dbg_f(zd_usb_dev(usb), | |
eefdbec1 JK |
1813 | "error in zd_submit_waiting_usb(). " |
1814 | "Error number %d\n", r); | |
e85d0918 DD |
1815 | goto error; |
1816 | } | |
1817 | ||
eefdbec1 JK |
1818 | /* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs |
1819 | * of currect batch except for very last. | |
1820 | */ | |
1821 | usb->urb_async_waiting = urb; | |
1822 | return 0; | |
e85d0918 | 1823 | error: |
eefdbec1 | 1824 | usb_free_urb(urb); |
e85d0918 DD |
1825 | return r; |
1826 | } | |
1827 | ||
eefdbec1 JK |
1828 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, |
1829 | unsigned int count) | |
1830 | { | |
1831 | int r; | |
1832 | ||
1833 | zd_usb_iowrite16v_async_start(usb); | |
1834 | r = zd_usb_iowrite16v_async(usb, ioreqs, count); | |
1835 | if (r) { | |
1836 | zd_usb_iowrite16v_async_end(usb, 0); | |
1837 | return r; | |
1838 | } | |
1839 | return zd_usb_iowrite16v_async_end(usb, 50 /* ms */); | |
1840 | } | |
1841 | ||
e85d0918 DD |
1842 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) |
1843 | { | |
1844 | int r; | |
1845 | struct usb_device *udev; | |
1846 | struct usb_req_rfwrite *req = NULL; | |
1847 | int i, req_len, actual_req_len; | |
1848 | u16 bit_value_template; | |
1849 | ||
1850 | if (in_atomic()) { | |
1851 | dev_dbg_f(zd_usb_dev(usb), | |
1852 | "error: io in atomic context not supported\n"); | |
1853 | return -EWOULDBLOCK; | |
1854 | } | |
1855 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1856 | dev_dbg_f(zd_usb_dev(usb), | |
1857 | "error: bits %d are smaller than" | |
1858 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1859 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1860 | return -EINVAL; | |
1861 | } | |
1862 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1863 | dev_dbg_f(zd_usb_dev(usb), | |
1864 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
1865 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
1866 | return -EINVAL; | |
1867 | } | |
1868 | #ifdef DEBUG | |
1869 | if (value & (~0UL << bits)) { | |
1870 | dev_dbg_f(zd_usb_dev(usb), | |
1871 | "error: value %#09x has bits >= %d set\n", | |
1872 | value, bits); | |
1873 | return -EINVAL; | |
1874 | } | |
1875 | #endif /* DEBUG */ | |
1876 | ||
1877 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
1878 | ||
1879 | r = zd_usb_ioread16(usb, &bit_value_template, CR203); | |
1880 | if (r) { | |
1881 | dev_dbg_f(zd_usb_dev(usb), | |
1882 | "error %d: Couldn't read CR203\n", r); | |
9bca0c3b | 1883 | return r; |
e85d0918 DD |
1884 | } |
1885 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
1886 | ||
9bca0c3b JK |
1887 | ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex)); |
1888 | BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) + | |
1889 | USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) > | |
1890 | sizeof(usb->req_buf)); | |
1891 | BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) > | |
1892 | sizeof(usb->req_buf)); | |
1893 | ||
e85d0918 | 1894 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); |
9bca0c3b | 1895 | req = (void *)usb->req_buf; |
e85d0918 DD |
1896 | |
1897 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
1898 | /* 1: 3683a, but not used in ZYDAS driver */ | |
1899 | req->value = cpu_to_le16(2); | |
1900 | req->bits = cpu_to_le16(bits); | |
1901 | ||
1902 | for (i = 0; i < bits; i++) { | |
1903 | u16 bv = bit_value_template; | |
1904 | if (value & (1 << (bits-1-i))) | |
1905 | bv |= RF_DATA; | |
1906 | req->bit_values[i] = cpu_to_le16(bv); | |
1907 | } | |
1908 | ||
1909 | udev = zd_usb_to_usbdev(usb); | |
37939810 JK |
1910 | r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT), |
1911 | req, req_len, &actual_req_len, 50 /* ms */); | |
e85d0918 DD |
1912 | if (r) { |
1913 | dev_dbg_f(zd_usb_dev(usb), | |
37939810 | 1914 | "error in usb_interrupt_msg(). Error number %d\n", r); |
e85d0918 DD |
1915 | goto out; |
1916 | } | |
1917 | if (req_len != actual_req_len) { | |
37939810 | 1918 | dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()" |
e85d0918 DD |
1919 | " req_len %d != actual_req_len %d\n", |
1920 | req_len, actual_req_len); | |
1921 | r = -EIO; | |
1922 | goto out; | |
1923 | } | |
1924 | ||
1925 | /* FALL-THROUGH with r == 0 */ | |
1926 | out: | |
e85d0918 DD |
1927 | return r; |
1928 | } |