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e85d0918 DD |
1 | /* zd_usb.c |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2 of the License, or | |
6 | * (at your option) any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
17 | ||
18 | #include <asm/unaligned.h> | |
d066c219 | 19 | #include <linux/kernel.h> |
e85d0918 DD |
20 | #include <linux/init.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/firmware.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/usb.h> | |
bc5f06a8 | 27 | #include <linux/workqueue.h> |
e85d0918 DD |
28 | #include <net/ieee80211.h> |
29 | ||
30 | #include "zd_def.h" | |
31 | #include "zd_netdev.h" | |
32 | #include "zd_mac.h" | |
33 | #include "zd_usb.h" | |
34 | #include "zd_util.h" | |
35 | ||
36 | static struct usb_device_id usb_ids[] = { | |
37 | /* ZD1211 */ | |
38 | { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 }, | |
39 | { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 }, | |
40 | { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 }, | |
41 | { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, | |
42 | { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 }, | |
aa1d3a18 | 43 | { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 }, |
e85d0918 | 44 | { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 }, |
dd2f5538 | 45 | { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 }, |
1b865491 | 46 | { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, |
12f39308 | 47 | { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 }, |
4ceb7e99 | 48 | { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 }, |
fca2714f | 49 | { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 }, |
fc3e39be | 50 | { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 }, |
f2423723 DD |
51 | { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 }, |
52 | { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 }, | |
53 | { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 }, | |
a362bf57 | 54 | { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 }, |
229782a3 | 55 | { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 }, |
a3fa3aba | 56 | { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 }, |
e85d0918 DD |
57 | /* ZD1211B */ |
58 | { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, | |
59 | { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, | |
dd2f5538 | 60 | { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
943599ee | 61 | { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, |
8e87295b | 62 | { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, |
a2bdcc67 DD |
63 | { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, |
64 | { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, | |
33218ba1 | 65 | { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, |
2e9b2467 | 66 | { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, |
aec91028 DD |
67 | { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
68 | { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, | |
c445a31c | 69 | { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
5d082fe8 | 70 | { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, |
187bb417 | 71 | { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, |
019a6755 | 72 | { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
a1030e92 DD |
73 | /* "Driverless" devices that need ejecting */ |
74 | { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, | |
aa1d3a18 | 75 | { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
e85d0918 DD |
76 | {} |
77 | }; | |
78 | ||
79 | MODULE_LICENSE("GPL"); | |
80 | MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); | |
81 | MODULE_AUTHOR("Ulrich Kunitz"); | |
82 | MODULE_AUTHOR("Daniel Drake"); | |
83 | MODULE_VERSION("1.0"); | |
84 | MODULE_DEVICE_TABLE(usb, usb_ids); | |
85 | ||
86 | #define FW_ZD1211_PREFIX "zd1211/zd1211_" | |
87 | #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" | |
88 | ||
e85d0918 DD |
89 | /* USB device initialization */ |
90 | ||
91 | static int request_fw_file( | |
92 | const struct firmware **fw, const char *name, struct device *device) | |
93 | { | |
94 | int r; | |
95 | ||
96 | dev_dbg_f(device, "fw name %s\n", name); | |
97 | ||
98 | r = request_firmware(fw, name, device); | |
99 | if (r) | |
100 | dev_err(device, | |
101 | "Could not load firmware file %s. Error number %d\n", | |
102 | name, r); | |
103 | return r; | |
104 | } | |
105 | ||
106 | static inline u16 get_bcdDevice(const struct usb_device *udev) | |
107 | { | |
108 | return le16_to_cpu(udev->descriptor.bcdDevice); | |
109 | } | |
110 | ||
111 | enum upload_code_flags { | |
112 | REBOOT = 1, | |
113 | }; | |
114 | ||
115 | /* Ensures that MAX_TRANSFER_SIZE is even. */ | |
116 | #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) | |
117 | ||
118 | static int upload_code(struct usb_device *udev, | |
119 | const u8 *data, size_t size, u16 code_offset, int flags) | |
120 | { | |
121 | u8 *p; | |
122 | int r; | |
123 | ||
124 | /* USB request blocks need "kmalloced" buffers. | |
125 | */ | |
126 | p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); | |
127 | if (!p) { | |
128 | dev_err(&udev->dev, "out of memory\n"); | |
129 | r = -ENOMEM; | |
130 | goto error; | |
131 | } | |
132 | ||
133 | size &= ~1; | |
134 | while (size > 0) { | |
135 | size_t transfer_size = size <= MAX_TRANSFER_SIZE ? | |
136 | size : MAX_TRANSFER_SIZE; | |
137 | ||
138 | dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); | |
139 | ||
140 | memcpy(p, data, transfer_size); | |
141 | r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), | |
142 | USB_REQ_FIRMWARE_DOWNLOAD, | |
143 | USB_DIR_OUT | USB_TYPE_VENDOR, | |
144 | code_offset, 0, p, transfer_size, 1000 /* ms */); | |
145 | if (r < 0) { | |
146 | dev_err(&udev->dev, | |
147 | "USB control request for firmware upload" | |
148 | " failed. Error number %d\n", r); | |
149 | goto error; | |
150 | } | |
151 | transfer_size = r & ~1; | |
152 | ||
153 | size -= transfer_size; | |
154 | data += transfer_size; | |
155 | code_offset += transfer_size/sizeof(u16); | |
156 | } | |
157 | ||
158 | if (flags & REBOOT) { | |
159 | u8 ret; | |
160 | ||
161 | r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), | |
162 | USB_REQ_FIRMWARE_CONFIRM, | |
163 | USB_DIR_IN | USB_TYPE_VENDOR, | |
164 | 0, 0, &ret, sizeof(ret), 5000 /* ms */); | |
165 | if (r != sizeof(ret)) { | |
166 | dev_err(&udev->dev, | |
167 | "control request firmeware confirmation failed." | |
168 | " Return value %d\n", r); | |
169 | if (r >= 0) | |
170 | r = -ENODEV; | |
171 | goto error; | |
172 | } | |
173 | if (ret & 0x80) { | |
174 | dev_err(&udev->dev, | |
175 | "Internal error while downloading." | |
176 | " Firmware confirm return value %#04x\n", | |
177 | (unsigned int)ret); | |
178 | r = -ENODEV; | |
179 | goto error; | |
180 | } | |
181 | dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", | |
182 | (unsigned int)ret); | |
183 | } | |
184 | ||
185 | r = 0; | |
186 | error: | |
187 | kfree(p); | |
188 | return r; | |
189 | } | |
190 | ||
191 | static u16 get_word(const void *data, u16 offset) | |
192 | { | |
193 | const __le16 *p = data; | |
194 | return le16_to_cpu(p[offset]); | |
195 | } | |
196 | ||
197 | static char *get_fw_name(char *buffer, size_t size, u8 device_type, | |
198 | const char* postfix) | |
199 | { | |
200 | scnprintf(buffer, size, "%s%s", | |
201 | device_type == DEVICE_ZD1211B ? | |
202 | FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, | |
203 | postfix); | |
204 | return buffer; | |
205 | } | |
206 | ||
d066c219 DD |
207 | static int handle_version_mismatch(struct usb_device *udev, u8 device_type, |
208 | const struct firmware *ub_fw) | |
209 | { | |
210 | const struct firmware *ur_fw = NULL; | |
211 | int offset; | |
212 | int r = 0; | |
213 | char fw_name[128]; | |
214 | ||
215 | r = request_fw_file(&ur_fw, | |
216 | get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"), | |
217 | &udev->dev); | |
218 | if (r) | |
219 | goto error; | |
220 | ||
ee302767 | 221 | r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
d066c219 DD |
222 | if (r) |
223 | goto error; | |
224 | ||
ee302767 | 225 | offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
d066c219 | 226 | r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
ee302767 | 227 | E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
d066c219 DD |
228 | |
229 | /* At this point, the vendor driver downloads the whole firmware | |
230 | * image, hacks around with version IDs, and uploads it again, | |
231 | * completely overwriting the boot code. We do not do this here as | |
232 | * it is not required on any tested devices, and it is suspected to | |
233 | * cause problems. */ | |
234 | error: | |
235 | release_firmware(ur_fw); | |
236 | return r; | |
237 | } | |
238 | ||
e85d0918 DD |
239 | static int upload_firmware(struct usb_device *udev, u8 device_type) |
240 | { | |
241 | int r; | |
242 | u16 fw_bcdDevice; | |
243 | u16 bcdDevice; | |
244 | const struct firmware *ub_fw = NULL; | |
245 | const struct firmware *uph_fw = NULL; | |
246 | char fw_name[128]; | |
247 | ||
248 | bcdDevice = get_bcdDevice(udev); | |
249 | ||
250 | r = request_fw_file(&ub_fw, | |
251 | get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"), | |
252 | &udev->dev); | |
253 | if (r) | |
254 | goto error; | |
255 | ||
ee302767 | 256 | fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
e85d0918 | 257 | |
e85d0918 DD |
258 | if (fw_bcdDevice != bcdDevice) { |
259 | dev_info(&udev->dev, | |
d066c219 DD |
260 | "firmware version %#06x and device bootcode version " |
261 | "%#06x differ\n", fw_bcdDevice, bcdDevice); | |
262 | if (bcdDevice <= 0x4313) | |
263 | dev_warn(&udev->dev, "device has old bootcode, please " | |
264 | "report success or failure\n"); | |
265 | ||
266 | r = handle_version_mismatch(udev, device_type, ub_fw); | |
267 | if (r) | |
268 | goto error; | |
e85d0918 DD |
269 | } else { |
270 | dev_dbg_f(&udev->dev, | |
271 | "firmware device id %#06x is equal to the " | |
272 | "actual device id\n", fw_bcdDevice); | |
273 | } | |
274 | ||
275 | ||
276 | r = request_fw_file(&uph_fw, | |
277 | get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"), | |
278 | &udev->dev); | |
279 | if (r) | |
280 | goto error; | |
281 | ||
ee302767 | 282 | r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
e85d0918 DD |
283 | if (r) { |
284 | dev_err(&udev->dev, | |
285 | "Could not upload firmware code uph. Error number %d\n", | |
286 | r); | |
287 | } | |
288 | ||
289 | /* FALL-THROUGH */ | |
290 | error: | |
291 | release_firmware(ub_fw); | |
292 | release_firmware(uph_fw); | |
293 | return r; | |
294 | } | |
295 | ||
e85d0918 DD |
296 | #define urb_dev(urb) (&(urb)->dev->dev) |
297 | ||
298 | static inline void handle_regs_int(struct urb *urb) | |
299 | { | |
300 | struct zd_usb *usb = urb->context; | |
301 | struct zd_usb_interrupt *intr = &usb->intr; | |
302 | int len; | |
303 | ||
304 | ZD_ASSERT(in_interrupt()); | |
305 | spin_lock(&intr->lock); | |
306 | ||
307 | if (intr->read_regs_enabled) { | |
308 | intr->read_regs.length = len = urb->actual_length; | |
309 | ||
310 | if (len > sizeof(intr->read_regs.buffer)) | |
311 | len = sizeof(intr->read_regs.buffer); | |
312 | memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); | |
313 | intr->read_regs_enabled = 0; | |
314 | complete(&intr->read_regs.completion); | |
315 | goto out; | |
316 | } | |
317 | ||
318 | dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n"); | |
319 | out: | |
320 | spin_unlock(&intr->lock); | |
321 | } | |
322 | ||
323 | static inline void handle_retry_failed_int(struct urb *urb) | |
324 | { | |
22d3405f UK |
325 | struct zd_usb *usb = urb->context; |
326 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
327 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); | |
328 | ||
329 | ieee->stats.tx_errors++; | |
330 | ieee->ieee_stats.tx_retry_limit_exceeded++; | |
e85d0918 DD |
331 | dev_dbg_f(urb_dev(urb), "retry failed interrupt\n"); |
332 | } | |
333 | ||
334 | ||
7d12e780 | 335 | static void int_urb_complete(struct urb *urb) |
e85d0918 DD |
336 | { |
337 | int r; | |
338 | struct usb_int_header *hdr; | |
339 | ||
340 | switch (urb->status) { | |
341 | case 0: | |
342 | break; | |
343 | case -ESHUTDOWN: | |
344 | case -EINVAL: | |
345 | case -ENODEV: | |
346 | case -ENOENT: | |
347 | case -ECONNRESET: | |
e85d0918 | 348 | case -EPIPE: |
b312d799 | 349 | goto kfree; |
e85d0918 DD |
350 | default: |
351 | goto resubmit; | |
352 | } | |
353 | ||
354 | if (urb->actual_length < sizeof(hdr)) { | |
355 | dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); | |
356 | goto resubmit; | |
357 | } | |
358 | ||
359 | hdr = urb->transfer_buffer; | |
360 | if (hdr->type != USB_INT_TYPE) { | |
361 | dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); | |
362 | goto resubmit; | |
363 | } | |
364 | ||
365 | switch (hdr->id) { | |
366 | case USB_INT_ID_REGS: | |
367 | handle_regs_int(urb); | |
368 | break; | |
369 | case USB_INT_ID_RETRY_FAILED: | |
370 | handle_retry_failed_int(urb); | |
371 | break; | |
372 | default: | |
373 | dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, | |
374 | (unsigned int)hdr->id); | |
375 | goto resubmit; | |
376 | } | |
377 | ||
378 | resubmit: | |
379 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
380 | if (r) { | |
381 | dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb); | |
382 | goto kfree; | |
383 | } | |
384 | return; | |
385 | kfree: | |
386 | kfree(urb->transfer_buffer); | |
387 | } | |
388 | ||
389 | static inline int int_urb_interval(struct usb_device *udev) | |
390 | { | |
391 | switch (udev->speed) { | |
392 | case USB_SPEED_HIGH: | |
393 | return 4; | |
394 | case USB_SPEED_LOW: | |
395 | return 10; | |
396 | case USB_SPEED_FULL: | |
397 | default: | |
398 | return 1; | |
399 | } | |
400 | } | |
401 | ||
402 | static inline int usb_int_enabled(struct zd_usb *usb) | |
403 | { | |
404 | unsigned long flags; | |
405 | struct zd_usb_interrupt *intr = &usb->intr; | |
406 | struct urb *urb; | |
407 | ||
408 | spin_lock_irqsave(&intr->lock, flags); | |
409 | urb = intr->urb; | |
410 | spin_unlock_irqrestore(&intr->lock, flags); | |
411 | return urb != NULL; | |
412 | } | |
413 | ||
414 | int zd_usb_enable_int(struct zd_usb *usb) | |
415 | { | |
416 | int r; | |
417 | struct usb_device *udev; | |
418 | struct zd_usb_interrupt *intr = &usb->intr; | |
419 | void *transfer_buffer = NULL; | |
420 | struct urb *urb; | |
421 | ||
422 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
423 | ||
35c3404e | 424 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
425 | if (!urb) { |
426 | r = -ENOMEM; | |
427 | goto out; | |
428 | } | |
429 | ||
430 | ZD_ASSERT(!irqs_disabled()); | |
431 | spin_lock_irq(&intr->lock); | |
432 | if (intr->urb) { | |
433 | spin_unlock_irq(&intr->lock); | |
434 | r = 0; | |
435 | goto error_free_urb; | |
436 | } | |
437 | intr->urb = urb; | |
438 | spin_unlock_irq(&intr->lock); | |
439 | ||
440 | /* TODO: make it a DMA buffer */ | |
441 | r = -ENOMEM; | |
35c3404e | 442 | transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL); |
e85d0918 DD |
443 | if (!transfer_buffer) { |
444 | dev_dbg_f(zd_usb_dev(usb), | |
445 | "couldn't allocate transfer_buffer\n"); | |
446 | goto error_set_urb_null; | |
447 | } | |
448 | ||
449 | udev = zd_usb_to_usbdev(usb); | |
450 | usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), | |
451 | transfer_buffer, USB_MAX_EP_INT_BUFFER, | |
452 | int_urb_complete, usb, | |
453 | intr->interval); | |
454 | ||
455 | dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); | |
35c3404e | 456 | r = usb_submit_urb(urb, GFP_KERNEL); |
e85d0918 DD |
457 | if (r) { |
458 | dev_dbg_f(zd_usb_dev(usb), | |
459 | "Couldn't submit urb. Error number %d\n", r); | |
460 | goto error; | |
461 | } | |
462 | ||
463 | return 0; | |
464 | error: | |
465 | kfree(transfer_buffer); | |
466 | error_set_urb_null: | |
467 | spin_lock_irq(&intr->lock); | |
468 | intr->urb = NULL; | |
469 | spin_unlock_irq(&intr->lock); | |
470 | error_free_urb: | |
471 | usb_free_urb(urb); | |
472 | out: | |
473 | return r; | |
474 | } | |
475 | ||
476 | void zd_usb_disable_int(struct zd_usb *usb) | |
477 | { | |
478 | unsigned long flags; | |
479 | struct zd_usb_interrupt *intr = &usb->intr; | |
480 | struct urb *urb; | |
481 | ||
482 | spin_lock_irqsave(&intr->lock, flags); | |
483 | urb = intr->urb; | |
484 | if (!urb) { | |
485 | spin_unlock_irqrestore(&intr->lock, flags); | |
486 | return; | |
487 | } | |
488 | intr->urb = NULL; | |
489 | spin_unlock_irqrestore(&intr->lock, flags); | |
490 | ||
491 | usb_kill_urb(urb); | |
492 | dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); | |
493 | usb_free_urb(urb); | |
494 | } | |
495 | ||
496 | static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, | |
497 | unsigned int length) | |
498 | { | |
499 | int i; | |
500 | struct zd_mac *mac = zd_usb_to_mac(usb); | |
501 | const struct rx_length_info *length_info; | |
502 | ||
503 | if (length < sizeof(struct rx_length_info)) { | |
504 | /* It's not a complete packet anyhow. */ | |
22d3405f UK |
505 | struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
506 | ieee->stats.rx_errors++; | |
507 | ieee->stats.rx_length_errors++; | |
e85d0918 DD |
508 | return; |
509 | } | |
510 | length_info = (struct rx_length_info *) | |
511 | (buffer + length - sizeof(struct rx_length_info)); | |
512 | ||
513 | /* It might be that three frames are merged into a single URB | |
514 | * transaction. We have to check for the length info tag. | |
515 | * | |
516 | * While testing we discovered that length_info might be unaligned, | |
517 | * because if USB transactions are merged, the last packet will not | |
518 | * be padded. Unaligned access might also happen if the length_info | |
519 | * structure is not present. | |
520 | */ | |
b269825b UK |
521 | if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG)) |
522 | { | |
e85d0918 DD |
523 | unsigned int l, k, n; |
524 | for (i = 0, l = 0;; i++) { | |
b269825b | 525 | k = le16_to_cpu(get_unaligned(&length_info->length[i])); |
850c211c UK |
526 | if (k == 0) |
527 | return; | |
e85d0918 DD |
528 | n = l+k; |
529 | if (n > length) | |
530 | return; | |
4d1feabc | 531 | zd_mac_rx_irq(mac, buffer+l, k); |
e85d0918 DD |
532 | if (i >= 2) |
533 | return; | |
534 | l = (n+3) & ~3; | |
535 | } | |
536 | } else { | |
4d1feabc | 537 | zd_mac_rx_irq(mac, buffer, length); |
e85d0918 DD |
538 | } |
539 | } | |
540 | ||
7d12e780 | 541 | static void rx_urb_complete(struct urb *urb) |
e85d0918 DD |
542 | { |
543 | struct zd_usb *usb; | |
544 | struct zd_usb_rx *rx; | |
545 | const u8 *buffer; | |
546 | unsigned int length; | |
547 | ||
548 | switch (urb->status) { | |
549 | case 0: | |
550 | break; | |
551 | case -ESHUTDOWN: | |
552 | case -EINVAL: | |
553 | case -ENODEV: | |
554 | case -ENOENT: | |
555 | case -ECONNRESET: | |
e85d0918 | 556 | case -EPIPE: |
b312d799 | 557 | return; |
e85d0918 DD |
558 | default: |
559 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
560 | goto resubmit; | |
561 | } | |
562 | ||
563 | buffer = urb->transfer_buffer; | |
564 | length = urb->actual_length; | |
565 | usb = urb->context; | |
566 | rx = &usb->rx; | |
567 | ||
568 | if (length%rx->usb_packet_size > rx->usb_packet_size-4) { | |
569 | /* If there is an old first fragment, we don't care. */ | |
570 | dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); | |
571 | ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); | |
572 | spin_lock(&rx->lock); | |
573 | memcpy(rx->fragment, buffer, length); | |
574 | rx->fragment_length = length; | |
575 | spin_unlock(&rx->lock); | |
576 | goto resubmit; | |
577 | } | |
578 | ||
579 | spin_lock(&rx->lock); | |
580 | if (rx->fragment_length > 0) { | |
581 | /* We are on a second fragment, we believe */ | |
582 | ZD_ASSERT(length + rx->fragment_length <= | |
583 | ARRAY_SIZE(rx->fragment)); | |
584 | dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); | |
585 | memcpy(rx->fragment+rx->fragment_length, buffer, length); | |
586 | handle_rx_packet(usb, rx->fragment, | |
587 | rx->fragment_length + length); | |
588 | rx->fragment_length = 0; | |
589 | spin_unlock(&rx->lock); | |
590 | } else { | |
591 | spin_unlock(&rx->lock); | |
592 | handle_rx_packet(usb, buffer, length); | |
593 | } | |
594 | ||
595 | resubmit: | |
596 | usb_submit_urb(urb, GFP_ATOMIC); | |
597 | } | |
598 | ||
c48cf125 | 599 | static struct urb *alloc_urb(struct zd_usb *usb) |
e85d0918 DD |
600 | { |
601 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
602 | struct urb *urb; | |
603 | void *buffer; | |
604 | ||
35c3404e | 605 | urb = usb_alloc_urb(0, GFP_KERNEL); |
e85d0918 DD |
606 | if (!urb) |
607 | return NULL; | |
35c3404e | 608 | buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
e85d0918 DD |
609 | &urb->transfer_dma); |
610 | if (!buffer) { | |
611 | usb_free_urb(urb); | |
612 | return NULL; | |
613 | } | |
614 | ||
615 | usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), | |
616 | buffer, USB_MAX_RX_SIZE, | |
617 | rx_urb_complete, usb); | |
618 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
619 | ||
620 | return urb; | |
621 | } | |
622 | ||
c48cf125 | 623 | static void free_urb(struct urb *urb) |
e85d0918 DD |
624 | { |
625 | if (!urb) | |
626 | return; | |
627 | usb_buffer_free(urb->dev, urb->transfer_buffer_length, | |
628 | urb->transfer_buffer, urb->transfer_dma); | |
629 | usb_free_urb(urb); | |
630 | } | |
631 | ||
632 | int zd_usb_enable_rx(struct zd_usb *usb) | |
633 | { | |
634 | int i, r; | |
635 | struct zd_usb_rx *rx = &usb->rx; | |
636 | struct urb **urbs; | |
637 | ||
638 | dev_dbg_f(zd_usb_dev(usb), "\n"); | |
639 | ||
640 | r = -ENOMEM; | |
35c3404e | 641 | urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
e85d0918 DD |
642 | if (!urbs) |
643 | goto error; | |
644 | for (i = 0; i < URBS_COUNT; i++) { | |
645 | urbs[i] = alloc_urb(usb); | |
646 | if (!urbs[i]) | |
647 | goto error; | |
648 | } | |
649 | ||
650 | ZD_ASSERT(!irqs_disabled()); | |
651 | spin_lock_irq(&rx->lock); | |
652 | if (rx->urbs) { | |
653 | spin_unlock_irq(&rx->lock); | |
654 | r = 0; | |
655 | goto error; | |
656 | } | |
657 | rx->urbs = urbs; | |
658 | rx->urbs_count = URBS_COUNT; | |
659 | spin_unlock_irq(&rx->lock); | |
660 | ||
661 | for (i = 0; i < URBS_COUNT; i++) { | |
35c3404e | 662 | r = usb_submit_urb(urbs[i], GFP_KERNEL); |
e85d0918 DD |
663 | if (r) |
664 | goto error_submit; | |
665 | } | |
666 | ||
667 | return 0; | |
668 | error_submit: | |
669 | for (i = 0; i < URBS_COUNT; i++) { | |
670 | usb_kill_urb(urbs[i]); | |
671 | } | |
672 | spin_lock_irq(&rx->lock); | |
673 | rx->urbs = NULL; | |
674 | rx->urbs_count = 0; | |
675 | spin_unlock_irq(&rx->lock); | |
676 | error: | |
677 | if (urbs) { | |
678 | for (i = 0; i < URBS_COUNT; i++) | |
679 | free_urb(urbs[i]); | |
680 | } | |
681 | return r; | |
682 | } | |
683 | ||
684 | void zd_usb_disable_rx(struct zd_usb *usb) | |
685 | { | |
686 | int i; | |
687 | unsigned long flags; | |
688 | struct urb **urbs; | |
689 | unsigned int count; | |
690 | struct zd_usb_rx *rx = &usb->rx; | |
691 | ||
692 | spin_lock_irqsave(&rx->lock, flags); | |
693 | urbs = rx->urbs; | |
694 | count = rx->urbs_count; | |
695 | spin_unlock_irqrestore(&rx->lock, flags); | |
696 | if (!urbs) | |
697 | return; | |
698 | ||
699 | for (i = 0; i < count; i++) { | |
700 | usb_kill_urb(urbs[i]); | |
701 | free_urb(urbs[i]); | |
702 | } | |
703 | kfree(urbs); | |
704 | ||
705 | spin_lock_irqsave(&rx->lock, flags); | |
706 | rx->urbs = NULL; | |
707 | rx->urbs_count = 0; | |
708 | spin_unlock_irqrestore(&rx->lock, flags); | |
709 | } | |
710 | ||
7d12e780 | 711 | static void tx_urb_complete(struct urb *urb) |
e85d0918 DD |
712 | { |
713 | int r; | |
714 | ||
715 | switch (urb->status) { | |
716 | case 0: | |
717 | break; | |
718 | case -ESHUTDOWN: | |
719 | case -EINVAL: | |
720 | case -ENODEV: | |
721 | case -ENOENT: | |
722 | case -ECONNRESET: | |
b312d799 | 723 | case -EPIPE: |
e85d0918 DD |
724 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
725 | break; | |
e85d0918 DD |
726 | default: |
727 | dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); | |
728 | goto resubmit; | |
729 | } | |
730 | free_urb: | |
731 | usb_buffer_free(urb->dev, urb->transfer_buffer_length, | |
732 | urb->transfer_buffer, urb->transfer_dma); | |
733 | usb_free_urb(urb); | |
734 | return; | |
735 | resubmit: | |
736 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
737 | if (r) { | |
738 | dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); | |
739 | goto free_urb; | |
740 | } | |
741 | } | |
742 | ||
743 | /* Puts the frame on the USB endpoint. It doesn't wait for | |
744 | * completion. The frame must contain the control set. | |
745 | */ | |
746 | int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length) | |
747 | { | |
748 | int r; | |
749 | struct usb_device *udev = zd_usb_to_usbdev(usb); | |
750 | struct urb *urb; | |
751 | void *buffer; | |
752 | ||
753 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
754 | if (!urb) { | |
755 | r = -ENOMEM; | |
756 | goto out; | |
757 | } | |
758 | ||
759 | buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC, | |
760 | &urb->transfer_dma); | |
761 | if (!buffer) { | |
762 | r = -ENOMEM; | |
763 | goto error_free_urb; | |
764 | } | |
765 | memcpy(buffer, frame, length); | |
766 | ||
767 | usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), | |
768 | buffer, length, tx_urb_complete, NULL); | |
769 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
770 | ||
771 | r = usb_submit_urb(urb, GFP_ATOMIC); | |
772 | if (r) | |
773 | goto error; | |
774 | return 0; | |
775 | error: | |
776 | usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer, | |
777 | urb->transfer_dma); | |
778 | error_free_urb: | |
779 | usb_free_urb(urb); | |
780 | out: | |
781 | return r; | |
782 | } | |
783 | ||
784 | static inline void init_usb_interrupt(struct zd_usb *usb) | |
785 | { | |
786 | struct zd_usb_interrupt *intr = &usb->intr; | |
787 | ||
788 | spin_lock_init(&intr->lock); | |
789 | intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); | |
790 | init_completion(&intr->read_regs.completion); | |
0ce34bc8 | 791 | intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
e85d0918 DD |
792 | } |
793 | ||
794 | static inline void init_usb_rx(struct zd_usb *usb) | |
795 | { | |
796 | struct zd_usb_rx *rx = &usb->rx; | |
797 | spin_lock_init(&rx->lock); | |
798 | if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { | |
799 | rx->usb_packet_size = 512; | |
800 | } else { | |
801 | rx->usb_packet_size = 64; | |
802 | } | |
803 | ZD_ASSERT(rx->fragment_length == 0); | |
804 | } | |
805 | ||
806 | static inline void init_usb_tx(struct zd_usb *usb) | |
807 | { | |
808 | /* FIXME: at this point we will allocate a fixed number of urb's for | |
809 | * use in a cyclic scheme */ | |
810 | } | |
811 | ||
812 | void zd_usb_init(struct zd_usb *usb, struct net_device *netdev, | |
813 | struct usb_interface *intf) | |
814 | { | |
815 | memset(usb, 0, sizeof(*usb)); | |
816 | usb->intf = usb_get_intf(intf); | |
817 | usb_set_intfdata(usb->intf, netdev); | |
818 | init_usb_interrupt(usb); | |
819 | init_usb_tx(usb); | |
820 | init_usb_rx(usb); | |
821 | } | |
822 | ||
e85d0918 DD |
823 | void zd_usb_clear(struct zd_usb *usb) |
824 | { | |
825 | usb_set_intfdata(usb->intf, NULL); | |
826 | usb_put_intf(usb->intf); | |
c48cf125 | 827 | ZD_MEMCLEAR(usb, sizeof(*usb)); |
e85d0918 DD |
828 | /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
829 | } | |
830 | ||
831 | static const char *speed(enum usb_device_speed speed) | |
832 | { | |
833 | switch (speed) { | |
834 | case USB_SPEED_LOW: | |
835 | return "low"; | |
836 | case USB_SPEED_FULL: | |
837 | return "full"; | |
838 | case USB_SPEED_HIGH: | |
839 | return "high"; | |
840 | default: | |
841 | return "unknown speed"; | |
842 | } | |
843 | } | |
844 | ||
845 | static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) | |
846 | { | |
847 | return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", | |
848 | le16_to_cpu(udev->descriptor.idVendor), | |
849 | le16_to_cpu(udev->descriptor.idProduct), | |
850 | get_bcdDevice(udev), | |
851 | speed(udev->speed)); | |
852 | } | |
853 | ||
854 | int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) | |
855 | { | |
856 | struct usb_device *udev = interface_to_usbdev(usb->intf); | |
857 | return scnprint_id(udev, buffer, size); | |
858 | } | |
859 | ||
860 | #ifdef DEBUG | |
861 | static void print_id(struct usb_device *udev) | |
862 | { | |
863 | char buffer[40]; | |
864 | ||
865 | scnprint_id(udev, buffer, sizeof(buffer)); | |
866 | buffer[sizeof(buffer)-1] = 0; | |
867 | dev_dbg_f(&udev->dev, "%s\n", buffer); | |
868 | } | |
869 | #else | |
870 | #define print_id(udev) do { } while (0) | |
871 | #endif | |
872 | ||
a1030e92 DD |
873 | static int eject_installer(struct usb_interface *intf) |
874 | { | |
875 | struct usb_device *udev = interface_to_usbdev(intf); | |
876 | struct usb_host_interface *iface_desc = &intf->altsetting[0]; | |
877 | struct usb_endpoint_descriptor *endpoint; | |
878 | unsigned char *cmd; | |
879 | u8 bulk_out_ep; | |
880 | int r; | |
881 | ||
882 | /* Find bulk out endpoint */ | |
883 | endpoint = &iface_desc->endpoint[1].desc; | |
884 | if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT && | |
885 | (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == | |
886 | USB_ENDPOINT_XFER_BULK) { | |
887 | bulk_out_ep = endpoint->bEndpointAddress; | |
888 | } else { | |
889 | dev_err(&udev->dev, | |
890 | "zd1211rw: Could not find bulk out endpoint\n"); | |
891 | return -ENODEV; | |
892 | } | |
893 | ||
894 | cmd = kzalloc(31, GFP_KERNEL); | |
895 | if (cmd == NULL) | |
896 | return -ENODEV; | |
897 | ||
898 | /* USB bulk command block */ | |
899 | cmd[0] = 0x55; /* bulk command signature */ | |
900 | cmd[1] = 0x53; /* bulk command signature */ | |
901 | cmd[2] = 0x42; /* bulk command signature */ | |
902 | cmd[3] = 0x43; /* bulk command signature */ | |
903 | cmd[14] = 6; /* command length */ | |
904 | ||
905 | cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ | |
906 | cmd[19] = 0x2; /* eject disc */ | |
907 | ||
908 | dev_info(&udev->dev, "Ejecting virtual installer media...\n"); | |
909 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), | |
910 | cmd, 31, NULL, 2000); | |
911 | kfree(cmd); | |
912 | if (r) | |
913 | return r; | |
914 | ||
915 | /* At this point, the device disconnects and reconnects with the real | |
916 | * ID numbers. */ | |
917 | ||
918 | usb_set_intfdata(intf, NULL); | |
919 | return 0; | |
920 | } | |
921 | ||
e85d0918 DD |
922 | static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
923 | { | |
924 | int r; | |
925 | struct usb_device *udev = interface_to_usbdev(intf); | |
926 | struct net_device *netdev = NULL; | |
927 | ||
928 | print_id(udev); | |
929 | ||
a1030e92 DD |
930 | if (id->driver_info & DEVICE_INSTALLER) |
931 | return eject_installer(intf); | |
932 | ||
e85d0918 DD |
933 | switch (udev->speed) { |
934 | case USB_SPEED_LOW: | |
935 | case USB_SPEED_FULL: | |
936 | case USB_SPEED_HIGH: | |
937 | break; | |
938 | default: | |
939 | dev_dbg_f(&intf->dev, "Unknown USB speed\n"); | |
940 | r = -ENODEV; | |
941 | goto error; | |
942 | } | |
943 | ||
6e3632f6 UK |
944 | usb_reset_device(interface_to_usbdev(intf)); |
945 | ||
e85d0918 DD |
946 | netdev = zd_netdev_alloc(intf); |
947 | if (netdev == NULL) { | |
948 | r = -ENOMEM; | |
949 | goto error; | |
950 | } | |
951 | ||
952 | r = upload_firmware(udev, id->driver_info); | |
953 | if (r) { | |
954 | dev_err(&intf->dev, | |
955 | "couldn't load firmware. Error number %d\n", r); | |
956 | goto error; | |
957 | } | |
958 | ||
959 | r = usb_reset_configuration(udev); | |
960 | if (r) { | |
961 | dev_dbg_f(&intf->dev, | |
962 | "couldn't reset configuration. Error number %d\n", r); | |
963 | goto error; | |
964 | } | |
965 | ||
966 | /* At this point the interrupt endpoint is not generally enabled. We | |
967 | * save the USB bandwidth until the network device is opened. But | |
968 | * notify that the initialization of the MAC will require the | |
969 | * interrupts to be temporary enabled. | |
970 | */ | |
971 | r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info); | |
972 | if (r) { | |
973 | dev_dbg_f(&intf->dev, | |
974 | "couldn't initialize mac. Error number %d\n", r); | |
975 | goto error; | |
976 | } | |
977 | ||
978 | r = register_netdev(netdev); | |
979 | if (r) { | |
980 | dev_dbg_f(&intf->dev, | |
981 | "couldn't register netdev. Error number %d\n", r); | |
982 | goto error; | |
983 | } | |
984 | ||
985 | dev_dbg_f(&intf->dev, "successful\n"); | |
986 | dev_info(&intf->dev,"%s\n", netdev->name); | |
987 | return 0; | |
988 | error: | |
989 | usb_reset_device(interface_to_usbdev(intf)); | |
990 | zd_netdev_free(netdev); | |
991 | return r; | |
992 | } | |
993 | ||
994 | static void disconnect(struct usb_interface *intf) | |
995 | { | |
996 | struct net_device *netdev = zd_intf_to_netdev(intf); | |
997 | struct zd_mac *mac = zd_netdev_mac(netdev); | |
998 | struct zd_usb *usb = &mac->chip.usb; | |
999 | ||
a1030e92 DD |
1000 | /* Either something really bad happened, or we're just dealing with |
1001 | * a DEVICE_INSTALLER. */ | |
1002 | if (netdev == NULL) | |
1003 | return; | |
1004 | ||
e85d0918 DD |
1005 | dev_dbg_f(zd_usb_dev(usb), "\n"); |
1006 | ||
1007 | zd_netdev_disconnect(netdev); | |
1008 | ||
1009 | /* Just in case something has gone wrong! */ | |
1010 | zd_usb_disable_rx(usb); | |
1011 | zd_usb_disable_int(usb); | |
1012 | ||
1013 | /* If the disconnect has been caused by a removal of the | |
1014 | * driver module, the reset allows reloading of the driver. If the | |
1015 | * reset will not be executed here, the upload of the firmware in the | |
1016 | * probe function caused by the reloading of the driver will fail. | |
1017 | */ | |
1018 | usb_reset_device(interface_to_usbdev(intf)); | |
1019 | ||
e85d0918 DD |
1020 | zd_netdev_free(netdev); |
1021 | dev_dbg(&intf->dev, "disconnected\n"); | |
1022 | } | |
1023 | ||
1024 | static struct usb_driver driver = { | |
1025 | .name = "zd1211rw", | |
1026 | .id_table = usb_ids, | |
1027 | .probe = probe, | |
1028 | .disconnect = disconnect, | |
1029 | }; | |
1030 | ||
bc5f06a8 UK |
1031 | struct workqueue_struct *zd_workqueue; |
1032 | ||
e85d0918 DD |
1033 | static int __init usb_init(void) |
1034 | { | |
1035 | int r; | |
1036 | ||
741fec53 | 1037 | pr_debug("%s usb_init()\n", driver.name); |
e85d0918 | 1038 | |
bc5f06a8 UK |
1039 | zd_workqueue = create_singlethread_workqueue(driver.name); |
1040 | if (zd_workqueue == NULL) { | |
741fec53 | 1041 | printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
bc5f06a8 UK |
1042 | return -ENOMEM; |
1043 | } | |
1044 | ||
e85d0918 DD |
1045 | r = usb_register(&driver); |
1046 | if (r) { | |
192b775c | 1047 | destroy_workqueue(zd_workqueue); |
741fec53 UK |
1048 | printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
1049 | driver.name, r); | |
e85d0918 DD |
1050 | return r; |
1051 | } | |
1052 | ||
741fec53 | 1053 | pr_debug("%s initialized\n", driver.name); |
e85d0918 DD |
1054 | return 0; |
1055 | } | |
1056 | ||
1057 | static void __exit usb_exit(void) | |
1058 | { | |
741fec53 | 1059 | pr_debug("%s usb_exit()\n", driver.name); |
e85d0918 | 1060 | usb_deregister(&driver); |
bc5f06a8 | 1061 | destroy_workqueue(zd_workqueue); |
e85d0918 DD |
1062 | } |
1063 | ||
1064 | module_init(usb_init); | |
1065 | module_exit(usb_exit); | |
1066 | ||
1067 | static int usb_int_regs_length(unsigned int count) | |
1068 | { | |
1069 | return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); | |
1070 | } | |
1071 | ||
1072 | static void prepare_read_regs_int(struct zd_usb *usb) | |
1073 | { | |
1074 | struct zd_usb_interrupt *intr = &usb->intr; | |
1075 | ||
a68077de | 1076 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1077 | intr->read_regs_enabled = 1; |
1078 | INIT_COMPLETION(intr->read_regs.completion); | |
a68077de UK |
1079 | spin_unlock_irq(&intr->lock); |
1080 | } | |
1081 | ||
1082 | static void disable_read_regs_int(struct zd_usb *usb) | |
1083 | { | |
1084 | struct zd_usb_interrupt *intr = &usb->intr; | |
1085 | ||
1086 | spin_lock_irq(&intr->lock); | |
1087 | intr->read_regs_enabled = 0; | |
1088 | spin_unlock_irq(&intr->lock); | |
e85d0918 DD |
1089 | } |
1090 | ||
1091 | static int get_results(struct zd_usb *usb, u16 *values, | |
1092 | struct usb_req_read_regs *req, unsigned int count) | |
1093 | { | |
1094 | int r; | |
1095 | int i; | |
1096 | struct zd_usb_interrupt *intr = &usb->intr; | |
1097 | struct read_regs_int *rr = &intr->read_regs; | |
1098 | struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; | |
1099 | ||
a68077de | 1100 | spin_lock_irq(&intr->lock); |
e85d0918 DD |
1101 | |
1102 | r = -EIO; | |
1103 | /* The created block size seems to be larger than expected. | |
1104 | * However results appear to be correct. | |
1105 | */ | |
1106 | if (rr->length < usb_int_regs_length(count)) { | |
1107 | dev_dbg_f(zd_usb_dev(usb), | |
1108 | "error: actual length %d less than expected %d\n", | |
1109 | rr->length, usb_int_regs_length(count)); | |
1110 | goto error_unlock; | |
1111 | } | |
1112 | if (rr->length > sizeof(rr->buffer)) { | |
1113 | dev_dbg_f(zd_usb_dev(usb), | |
1114 | "error: actual length %d exceeds buffer size %zu\n", | |
1115 | rr->length, sizeof(rr->buffer)); | |
1116 | goto error_unlock; | |
1117 | } | |
1118 | ||
1119 | for (i = 0; i < count; i++) { | |
1120 | struct reg_data *rd = ®s->regs[i]; | |
1121 | if (rd->addr != req->addr[i]) { | |
1122 | dev_dbg_f(zd_usb_dev(usb), | |
1123 | "rd[%d] addr %#06hx expected %#06hx\n", i, | |
1124 | le16_to_cpu(rd->addr), | |
1125 | le16_to_cpu(req->addr[i])); | |
1126 | goto error_unlock; | |
1127 | } | |
1128 | values[i] = le16_to_cpu(rd->value); | |
1129 | } | |
1130 | ||
1131 | r = 0; | |
1132 | error_unlock: | |
a68077de | 1133 | spin_unlock_irq(&intr->lock); |
e85d0918 DD |
1134 | return r; |
1135 | } | |
1136 | ||
1137 | int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, | |
1138 | const zd_addr_t *addresses, unsigned int count) | |
1139 | { | |
1140 | int r; | |
1141 | int i, req_len, actual_req_len; | |
1142 | struct usb_device *udev; | |
1143 | struct usb_req_read_regs *req = NULL; | |
1144 | unsigned long timeout; | |
1145 | ||
1146 | if (count < 1) { | |
1147 | dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); | |
1148 | return -EINVAL; | |
1149 | } | |
1150 | if (count > USB_MAX_IOREAD16_COUNT) { | |
1151 | dev_dbg_f(zd_usb_dev(usb), | |
1152 | "error: count %u exceeds possible max %u\n", | |
1153 | count, USB_MAX_IOREAD16_COUNT); | |
1154 | return -EINVAL; | |
1155 | } | |
1156 | if (in_atomic()) { | |
1157 | dev_dbg_f(zd_usb_dev(usb), | |
1158 | "error: io in atomic context not supported\n"); | |
1159 | return -EWOULDBLOCK; | |
1160 | } | |
1161 | if (!usb_int_enabled(usb)) { | |
1162 | dev_dbg_f(zd_usb_dev(usb), | |
1163 | "error: usb interrupt not enabled\n"); | |
1164 | return -EWOULDBLOCK; | |
1165 | } | |
1166 | ||
1167 | req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); | |
35c3404e | 1168 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1169 | if (!req) |
1170 | return -ENOMEM; | |
1171 | req->id = cpu_to_le16(USB_REQ_READ_REGS); | |
1172 | for (i = 0; i < count; i++) | |
0ce34bc8 | 1173 | req->addr[i] = cpu_to_le16((u16)addresses[i]); |
e85d0918 DD |
1174 | |
1175 | udev = zd_usb_to_usbdev(usb); | |
1176 | prepare_read_regs_int(usb); | |
1177 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1178 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1179 | if (r) { | |
1180 | dev_dbg_f(zd_usb_dev(usb), | |
1181 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1182 | goto error; | |
1183 | } | |
1184 | if (req_len != actual_req_len) { | |
1185 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n" | |
1186 | " req_len %d != actual_req_len %d\n", | |
1187 | req_len, actual_req_len); | |
1188 | r = -EIO; | |
1189 | goto error; | |
1190 | } | |
1191 | ||
1192 | timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, | |
1193 | msecs_to_jiffies(1000)); | |
1194 | if (!timeout) { | |
1195 | disable_read_regs_int(usb); | |
1196 | dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); | |
1197 | r = -ETIMEDOUT; | |
1198 | goto error; | |
1199 | } | |
1200 | ||
1201 | r = get_results(usb, values, req, count); | |
1202 | error: | |
1203 | kfree(req); | |
1204 | return r; | |
1205 | } | |
1206 | ||
1207 | int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, | |
1208 | unsigned int count) | |
1209 | { | |
1210 | int r; | |
1211 | struct usb_device *udev; | |
1212 | struct usb_req_write_regs *req = NULL; | |
1213 | int i, req_len, actual_req_len; | |
1214 | ||
1215 | if (count == 0) | |
1216 | return 0; | |
1217 | if (count > USB_MAX_IOWRITE16_COUNT) { | |
1218 | dev_dbg_f(zd_usb_dev(usb), | |
1219 | "error: count %u exceeds possible max %u\n", | |
1220 | count, USB_MAX_IOWRITE16_COUNT); | |
1221 | return -EINVAL; | |
1222 | } | |
1223 | if (in_atomic()) { | |
1224 | dev_dbg_f(zd_usb_dev(usb), | |
1225 | "error: io in atomic context not supported\n"); | |
1226 | return -EWOULDBLOCK; | |
1227 | } | |
1228 | ||
1229 | req_len = sizeof(struct usb_req_write_regs) + | |
1230 | count * sizeof(struct reg_data); | |
35c3404e | 1231 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1232 | if (!req) |
1233 | return -ENOMEM; | |
1234 | ||
1235 | req->id = cpu_to_le16(USB_REQ_WRITE_REGS); | |
1236 | for (i = 0; i < count; i++) { | |
1237 | struct reg_data *rw = &req->reg_writes[i]; | |
0ce34bc8 | 1238 | rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
e85d0918 DD |
1239 | rw->value = cpu_to_le16(ioreqs[i].value); |
1240 | } | |
1241 | ||
1242 | udev = zd_usb_to_usbdev(usb); | |
1243 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1244 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1245 | if (r) { | |
1246 | dev_dbg_f(zd_usb_dev(usb), | |
1247 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1248 | goto error; | |
1249 | } | |
1250 | if (req_len != actual_req_len) { | |
1251 | dev_dbg_f(zd_usb_dev(usb), | |
1252 | "error in usb_bulk_msg()" | |
1253 | " req_len %d != actual_req_len %d\n", | |
1254 | req_len, actual_req_len); | |
1255 | r = -EIO; | |
1256 | goto error; | |
1257 | } | |
1258 | ||
1259 | /* FALL-THROUGH with r == 0 */ | |
1260 | error: | |
1261 | kfree(req); | |
1262 | return r; | |
1263 | } | |
1264 | ||
1265 | int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) | |
1266 | { | |
1267 | int r; | |
1268 | struct usb_device *udev; | |
1269 | struct usb_req_rfwrite *req = NULL; | |
1270 | int i, req_len, actual_req_len; | |
1271 | u16 bit_value_template; | |
1272 | ||
1273 | if (in_atomic()) { | |
1274 | dev_dbg_f(zd_usb_dev(usb), | |
1275 | "error: io in atomic context not supported\n"); | |
1276 | return -EWOULDBLOCK; | |
1277 | } | |
1278 | if (bits < USB_MIN_RFWRITE_BIT_COUNT) { | |
1279 | dev_dbg_f(zd_usb_dev(usb), | |
1280 | "error: bits %d are smaller than" | |
1281 | " USB_MIN_RFWRITE_BIT_COUNT %d\n", | |
1282 | bits, USB_MIN_RFWRITE_BIT_COUNT); | |
1283 | return -EINVAL; | |
1284 | } | |
1285 | if (bits > USB_MAX_RFWRITE_BIT_COUNT) { | |
1286 | dev_dbg_f(zd_usb_dev(usb), | |
1287 | "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", | |
1288 | bits, USB_MAX_RFWRITE_BIT_COUNT); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | #ifdef DEBUG | |
1292 | if (value & (~0UL << bits)) { | |
1293 | dev_dbg_f(zd_usb_dev(usb), | |
1294 | "error: value %#09x has bits >= %d set\n", | |
1295 | value, bits); | |
1296 | return -EINVAL; | |
1297 | } | |
1298 | #endif /* DEBUG */ | |
1299 | ||
1300 | dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); | |
1301 | ||
1302 | r = zd_usb_ioread16(usb, &bit_value_template, CR203); | |
1303 | if (r) { | |
1304 | dev_dbg_f(zd_usb_dev(usb), | |
1305 | "error %d: Couldn't read CR203\n", r); | |
1306 | goto out; | |
1307 | } | |
1308 | bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); | |
1309 | ||
1310 | req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); | |
35c3404e | 1311 | req = kmalloc(req_len, GFP_KERNEL); |
e85d0918 DD |
1312 | if (!req) |
1313 | return -ENOMEM; | |
1314 | ||
1315 | req->id = cpu_to_le16(USB_REQ_WRITE_RF); | |
1316 | /* 1: 3683a, but not used in ZYDAS driver */ | |
1317 | req->value = cpu_to_le16(2); | |
1318 | req->bits = cpu_to_le16(bits); | |
1319 | ||
1320 | for (i = 0; i < bits; i++) { | |
1321 | u16 bv = bit_value_template; | |
1322 | if (value & (1 << (bits-1-i))) | |
1323 | bv |= RF_DATA; | |
1324 | req->bit_values[i] = cpu_to_le16(bv); | |
1325 | } | |
1326 | ||
1327 | udev = zd_usb_to_usbdev(usb); | |
1328 | r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), | |
1329 | req, req_len, &actual_req_len, 1000 /* ms */); | |
1330 | if (r) { | |
1331 | dev_dbg_f(zd_usb_dev(usb), | |
1332 | "error in usb_bulk_msg(). Error number %d\n", r); | |
1333 | goto out; | |
1334 | } | |
1335 | if (req_len != actual_req_len) { | |
1336 | dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()" | |
1337 | " req_len %d != actual_req_len %d\n", | |
1338 | req_len, actual_req_len); | |
1339 | r = -EIO; | |
1340 | goto out; | |
1341 | } | |
1342 | ||
1343 | /* FALL-THROUGH with r == 0 */ | |
1344 | out: | |
1345 | kfree(req); | |
1346 | return r; | |
1347 | } |