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