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27d35fc3 AB |
1 | /* |
2 | * SQ905 subdriver | |
3 | * | |
4 | * Copyright (C) 2008, 2009 Adam Baker and Theodore Kilgore | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | /* | |
22 | * History and Acknowledgments | |
23 | * | |
24 | * The original Linux driver for SQ905 based cameras was written by | |
25985edc | 25 | * Marcell Lengyel and furter developed by many other contributors |
27d35fc3 AB |
26 | * and is available from http://sourceforge.net/projects/sqcam/ |
27 | * | |
28 | * This driver takes advantage of the reverse engineering work done for | |
29 | * that driver and for libgphoto2 but shares no code with them. | |
30 | * | |
31 | * This driver has used as a base the finepix driver and other gspca | |
32 | * based drivers and may still contain code fragments taken from those | |
33 | * drivers. | |
34 | */ | |
35 | ||
133a9fe9 JP |
36 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
37 | ||
27d35fc3 AB |
38 | #define MODULE_NAME "sq905" |
39 | ||
40 | #include <linux/workqueue.h> | |
5a0e3ad6 | 41 | #include <linux/slab.h> |
27d35fc3 AB |
42 | #include "gspca.h" |
43 | ||
44 | MODULE_AUTHOR("Adam Baker <linux@baker-net.org.uk>, " | |
45 | "Theodore Kilgore <kilgota@auburn.edu>"); | |
46 | MODULE_DESCRIPTION("GSPCA/SQ905 USB Camera Driver"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
49 | /* Default timeouts, in ms */ | |
50 | #define SQ905_CMD_TIMEOUT 500 | |
51 | #define SQ905_DATA_TIMEOUT 1000 | |
52 | ||
53 | /* Maximum transfer size to use. */ | |
54 | #define SQ905_MAX_TRANSFER 0x8000 | |
55 | #define FRAME_HEADER_LEN 64 | |
56 | ||
57 | /* The known modes, or registers. These go in the "value" slot. */ | |
58 | ||
59 | /* 00 is "none" obviously */ | |
60 | ||
61 | #define SQ905_BULK_READ 0x03 /* precedes any bulk read */ | |
62 | #define SQ905_COMMAND 0x06 /* precedes the command codes below */ | |
63 | #define SQ905_PING 0x07 /* when reading an "idling" command */ | |
64 | #define SQ905_READ_DONE 0xc0 /* ack bulk read completed */ | |
65 | ||
3b27591d AB |
66 | /* Any non-zero value in the bottom 2 bits of the 2nd byte of |
67 | * the ID appears to indicate the camera can do 640*480. If the | |
68 | * LSB of that byte is set the image is just upside down, otherwise | |
69 | * it is rotated 180 degrees. */ | |
70 | #define SQ905_HIRES_MASK 0x00000300 | |
71 | #define SQ905_ORIENTATION_MASK 0x00000100 | |
72 | ||
27d35fc3 AB |
73 | /* Some command codes. These go in the "index" slot. */ |
74 | ||
75 | #define SQ905_ID 0xf0 /* asks for model string */ | |
76 | #define SQ905_CONFIG 0x20 /* gets photo alloc. table, not used here */ | |
77 | #define SQ905_DATA 0x30 /* accesses photo data, not used here */ | |
78 | #define SQ905_CLEAR 0xa0 /* clear everything */ | |
3b27591d AB |
79 | #define SQ905_CAPTURE_LOW 0x60 /* Starts capture at 160x120 */ |
80 | #define SQ905_CAPTURE_MED 0x61 /* Starts capture at 320x240 */ | |
81 | #define SQ905_CAPTURE_HIGH 0x62 /* Starts capture at 640x480 (some cams only) */ | |
27d35fc3 | 82 | /* note that the capture command also controls the output dimensions */ |
27d35fc3 AB |
83 | |
84 | /* Structure to hold all of our device specific stuff */ | |
85 | struct sd { | |
86 | struct gspca_dev gspca_dev; /* !! must be the first item */ | |
87 | ||
27d35fc3 AB |
88 | /* |
89 | * Driver stuff | |
90 | */ | |
91 | struct work_struct work_struct; | |
92 | struct workqueue_struct *work_thread; | |
93 | }; | |
94 | ||
3b27591d AB |
95 | static struct v4l2_pix_format sq905_mode[] = { |
96 | { 160, 120, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, | |
97 | .bytesperline = 160, | |
98 | .sizeimage = 160 * 120, | |
99 | .colorspace = V4L2_COLORSPACE_SRGB, | |
100 | .priv = 0}, | |
27d35fc3 AB |
101 | { 320, 240, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, |
102 | .bytesperline = 320, | |
103 | .sizeimage = 320 * 240, | |
104 | .colorspace = V4L2_COLORSPACE_SRGB, | |
3b27591d AB |
105 | .priv = 0}, |
106 | { 640, 480, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, | |
107 | .bytesperline = 640, | |
108 | .sizeimage = 640 * 480, | |
109 | .colorspace = V4L2_COLORSPACE_SRGB, | |
27d35fc3 AB |
110 | .priv = 0} |
111 | }; | |
112 | ||
27d35fc3 AB |
113 | /* |
114 | * Send a command to the camera. | |
115 | */ | |
116 | static int sq905_command(struct gspca_dev *gspca_dev, u16 index) | |
117 | { | |
118 | int ret; | |
119 | ||
120 | gspca_dev->usb_buf[0] = '\0'; | |
121 | ret = usb_control_msg(gspca_dev->dev, | |
122 | usb_sndctrlpipe(gspca_dev->dev, 0), | |
123 | USB_REQ_SYNCH_FRAME, /* request */ | |
124 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
125 | SQ905_COMMAND, index, gspca_dev->usb_buf, 1, | |
126 | SQ905_CMD_TIMEOUT); | |
127 | if (ret < 0) { | |
133a9fe9 | 128 | pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); |
27d35fc3 AB |
129 | return ret; |
130 | } | |
131 | ||
132 | ret = usb_control_msg(gspca_dev->dev, | |
133 | usb_sndctrlpipe(gspca_dev->dev, 0), | |
134 | USB_REQ_SYNCH_FRAME, /* request */ | |
135 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
136 | SQ905_PING, 0, gspca_dev->usb_buf, 1, | |
137 | SQ905_CMD_TIMEOUT); | |
138 | if (ret < 0) { | |
133a9fe9 | 139 | pr_err("%s: usb_control_msg failed 2 (%d)\n", __func__, ret); |
27d35fc3 AB |
140 | return ret; |
141 | } | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Acknowledge the end of a frame - see warning on sq905_command. | |
148 | */ | |
149 | static int sq905_ack_frame(struct gspca_dev *gspca_dev) | |
150 | { | |
151 | int ret; | |
152 | ||
153 | gspca_dev->usb_buf[0] = '\0'; | |
154 | ret = usb_control_msg(gspca_dev->dev, | |
155 | usb_sndctrlpipe(gspca_dev->dev, 0), | |
156 | USB_REQ_SYNCH_FRAME, /* request */ | |
157 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
158 | SQ905_READ_DONE, 0, gspca_dev->usb_buf, 1, | |
159 | SQ905_CMD_TIMEOUT); | |
160 | if (ret < 0) { | |
133a9fe9 | 161 | pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); |
27d35fc3 AB |
162 | return ret; |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | /* | |
169 | * request and read a block of data - see warning on sq905_command. | |
170 | */ | |
171 | static int | |
85191100 | 172 | sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock) |
27d35fc3 AB |
173 | { |
174 | int ret; | |
175 | int act_len; | |
176 | ||
177 | gspca_dev->usb_buf[0] = '\0'; | |
85191100 HG |
178 | if (need_lock) |
179 | mutex_lock(&gspca_dev->usb_lock); | |
27d35fc3 AB |
180 | ret = usb_control_msg(gspca_dev->dev, |
181 | usb_sndctrlpipe(gspca_dev->dev, 0), | |
182 | USB_REQ_SYNCH_FRAME, /* request */ | |
183 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
184 | SQ905_BULK_READ, size, gspca_dev->usb_buf, | |
185 | 1, SQ905_CMD_TIMEOUT); | |
85191100 HG |
186 | if (need_lock) |
187 | mutex_unlock(&gspca_dev->usb_lock); | |
27d35fc3 | 188 | if (ret < 0) { |
133a9fe9 | 189 | pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); |
27d35fc3 AB |
190 | return ret; |
191 | } | |
192 | ret = usb_bulk_msg(gspca_dev->dev, | |
193 | usb_rcvbulkpipe(gspca_dev->dev, 0x81), | |
194 | data, size, &act_len, SQ905_DATA_TIMEOUT); | |
195 | ||
196 | /* successful, it returns 0, otherwise negative */ | |
197 | if (ret < 0 || act_len != size) { | |
133a9fe9 | 198 | pr_err("bulk read fail (%d) len %d/%d\n", ret, act_len, size); |
27d35fc3 AB |
199 | return -EIO; |
200 | } | |
201 | return 0; | |
202 | } | |
203 | ||
204 | /* This function is called as a workqueue function and runs whenever the camera | |
205 | * is streaming data. Because it is a workqueue function it is allowed to sleep | |
206 | * so we can use synchronous USB calls. To avoid possible collisions with other | |
207 | * threads attempting to use the camera's USB interface we take the gspca | |
208 | * usb_lock when performing USB operations. In practice the only thing we need | |
209 | * to protect against is the usb_set_interface call that gspca makes during | |
210 | * stream_off as the camera doesn't provide any controls that the user could try | |
211 | * to change. | |
212 | */ | |
213 | static void sq905_dostream(struct work_struct *work) | |
214 | { | |
215 | struct sd *dev = container_of(work, struct sd, work_struct); | |
216 | struct gspca_dev *gspca_dev = &dev->gspca_dev; | |
27d35fc3 AB |
217 | int bytes_left; /* bytes remaining in current frame. */ |
218 | int data_len; /* size to use for the next read. */ | |
219 | int header_read; /* true if we have already read the frame header. */ | |
27d35fc3 | 220 | int packet_type; |
67e45425 | 221 | int frame_sz; |
27d35fc3 AB |
222 | int ret; |
223 | u8 *data; | |
224 | u8 *buffer; | |
225 | ||
226 | buffer = kmalloc(SQ905_MAX_TRANSFER, GFP_KERNEL | GFP_DMA); | |
27d35fc3 | 227 | if (!buffer) { |
133a9fe9 | 228 | pr_err("Couldn't allocate USB buffer\n"); |
27d35fc3 AB |
229 | goto quit_stream; |
230 | } | |
231 | ||
67e45425 JFM |
232 | frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage |
233 | + FRAME_HEADER_LEN; | |
234 | ||
4ad34da0 HV |
235 | while (gspca_dev->dev && gspca_dev->streaming) { |
236 | #ifdef CONFIG_PM | |
237 | if (gspca_dev->frozen) | |
238 | break; | |
239 | #endif | |
27d35fc3 AB |
240 | /* request some data and then read it until we have |
241 | * a complete frame. */ | |
67e45425 | 242 | bytes_left = frame_sz; |
27d35fc3 | 243 | header_read = 0; |
27d35fc3 | 244 | |
85191100 HG |
245 | /* Note we do not check for gspca_dev->streaming here, as |
246 | we must finish reading an entire frame, otherwise the | |
247 | next time we stream we start reading in the middle of a | |
248 | frame. */ | |
254902b0 | 249 | while (bytes_left > 0 && gspca_dev->dev) { |
27d35fc3 AB |
250 | data_len = bytes_left > SQ905_MAX_TRANSFER ? |
251 | SQ905_MAX_TRANSFER : bytes_left; | |
85191100 | 252 | ret = sq905_read_data(gspca_dev, buffer, data_len, 1); |
27d35fc3 AB |
253 | if (ret < 0) |
254 | goto quit_stream; | |
85191100 | 255 | PDEBUG(D_PACK, |
27d35fc3 AB |
256 | "Got %d bytes out of %d for frame", |
257 | data_len, bytes_left); | |
258 | bytes_left -= data_len; | |
259 | data = buffer; | |
260 | if (!header_read) { | |
261 | packet_type = FIRST_PACKET; | |
262 | /* The first 64 bytes of each frame are | |
263 | * a header full of FF 00 bytes */ | |
264 | data += FRAME_HEADER_LEN; | |
265 | data_len -= FRAME_HEADER_LEN; | |
266 | header_read = 1; | |
267 | } else if (bytes_left == 0) { | |
268 | packet_type = LAST_PACKET; | |
269 | } else { | |
270 | packet_type = INTER_PACKET; | |
271 | } | |
76dd272b JFM |
272 | gspca_frame_add(gspca_dev, packet_type, |
273 | data, data_len); | |
274 | /* If entire frame fits in one packet we still | |
275 | need to add a LAST_PACKET */ | |
276 | if (packet_type == FIRST_PACKET && | |
277 | bytes_left == 0) | |
278 | gspca_frame_add(gspca_dev, LAST_PACKET, | |
279 | NULL, 0); | |
27d35fc3 | 280 | } |
254902b0 | 281 | if (gspca_dev->dev) { |
85191100 HG |
282 | /* acknowledge the frame */ |
283 | mutex_lock(&gspca_dev->usb_lock); | |
284 | ret = sq905_ack_frame(gspca_dev); | |
285 | mutex_unlock(&gspca_dev->usb_lock); | |
286 | if (ret < 0) | |
287 | goto quit_stream; | |
288 | } | |
27d35fc3 AB |
289 | } |
290 | quit_stream: | |
254902b0 | 291 | if (gspca_dev->dev) { |
85191100 | 292 | mutex_lock(&gspca_dev->usb_lock); |
27d35fc3 | 293 | sq905_command(gspca_dev, SQ905_CLEAR); |
85191100 HG |
294 | mutex_unlock(&gspca_dev->usb_lock); |
295 | } | |
27d35fc3 AB |
296 | kfree(buffer); |
297 | } | |
298 | ||
299 | /* This function is called at probe time just before sd_init */ | |
300 | static int sd_config(struct gspca_dev *gspca_dev, | |
301 | const struct usb_device_id *id) | |
302 | { | |
303 | struct cam *cam = &gspca_dev->cam; | |
304 | struct sd *dev = (struct sd *) gspca_dev; | |
305 | ||
27d35fc3 | 306 | /* We don't use the buffer gspca allocates so make it small. */ |
6929dc6b | 307 | cam->bulk = 1; |
27d35fc3 AB |
308 | cam->bulk_size = 64; |
309 | ||
310 | INIT_WORK(&dev->work_struct, sq905_dostream); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | /* called on streamoff with alt==0 and on disconnect */ | |
316 | /* the usb_lock is held at entry - restore on exit */ | |
317 | static void sd_stop0(struct gspca_dev *gspca_dev) | |
318 | { | |
319 | struct sd *dev = (struct sd *) gspca_dev; | |
320 | ||
321 | /* wait for the work queue to terminate */ | |
322 | mutex_unlock(&gspca_dev->usb_lock); | |
323 | /* This waits for sq905_dostream to finish */ | |
324 | destroy_workqueue(dev->work_thread); | |
325 | dev->work_thread = NULL; | |
326 | mutex_lock(&gspca_dev->usb_lock); | |
327 | } | |
328 | ||
329 | /* this function is called at probe and resume time */ | |
330 | static int sd_init(struct gspca_dev *gspca_dev) | |
331 | { | |
27d35fc3 AB |
332 | u32 ident; |
333 | int ret; | |
334 | ||
335 | /* connect to the camera and read | |
336 | * the model ID and process that and put it away. | |
337 | */ | |
338 | ret = sq905_command(gspca_dev, SQ905_CLEAR); | |
339 | if (ret < 0) | |
340 | return ret; | |
341 | ret = sq905_command(gspca_dev, SQ905_ID); | |
342 | if (ret < 0) | |
343 | return ret; | |
85191100 | 344 | ret = sq905_read_data(gspca_dev, gspca_dev->usb_buf, 4, 0); |
27d35fc3 AB |
345 | if (ret < 0) |
346 | return ret; | |
3b27591d AB |
347 | /* usb_buf is allocated with kmalloc so is aligned. |
348 | * Camera model number is the right way round if we assume this | |
349 | * reverse engineered ID is supposed to be big endian. */ | |
350 | ident = be32_to_cpup((__be32 *)gspca_dev->usb_buf); | |
27d35fc3 AB |
351 | ret = sq905_command(gspca_dev, SQ905_CLEAR); |
352 | if (ret < 0) | |
353 | return ret; | |
3b27591d AB |
354 | PDEBUG(D_CONF, "SQ905 camera ID %08x detected", ident); |
355 | gspca_dev->cam.cam_mode = sq905_mode; | |
356 | gspca_dev->cam.nmodes = ARRAY_SIZE(sq905_mode); | |
357 | if (!(ident & SQ905_HIRES_MASK)) | |
358 | gspca_dev->cam.nmodes--; | |
dfa76fa2 AB |
359 | |
360 | if (ident & SQ905_ORIENTATION_MASK) | |
361 | gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP; | |
362 | else | |
363 | gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP | | |
364 | V4L2_IN_ST_HFLIP; | |
27d35fc3 AB |
365 | return 0; |
366 | } | |
367 | ||
368 | /* Set up for getting frames. */ | |
369 | static int sd_start(struct gspca_dev *gspca_dev) | |
370 | { | |
371 | struct sd *dev = (struct sd *) gspca_dev; | |
372 | int ret; | |
373 | ||
374 | /* "Open the shutter" and set size, to start capture */ | |
67e45425 JFM |
375 | switch (gspca_dev->curr_mode) { |
376 | default: | |
377 | /* case 2: */ | |
3b27591d | 378 | PDEBUG(D_STREAM, "Start streaming at high resolution"); |
3b27591d AB |
379 | ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_HIGH); |
380 | break; | |
67e45425 | 381 | case 1: |
3b27591d | 382 | PDEBUG(D_STREAM, "Start streaming at medium resolution"); |
3b27591d AB |
383 | ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED); |
384 | break; | |
67e45425 | 385 | case 0: |
3b27591d AB |
386 | PDEBUG(D_STREAM, "Start streaming at low resolution"); |
387 | ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_LOW); | |
388 | } | |
389 | ||
27d35fc3 AB |
390 | if (ret < 0) { |
391 | PDEBUG(D_ERR, "Start streaming command failed"); | |
392 | return ret; | |
393 | } | |
27d35fc3 AB |
394 | /* Start the workqueue function to do the streaming */ |
395 | dev->work_thread = create_singlethread_workqueue(MODULE_NAME); | |
396 | queue_work(dev->work_thread, &dev->work_struct); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | /* Table of supported USB devices */ | |
95c967c1 | 402 | static const struct usb_device_id device_table[] = { |
27d35fc3 AB |
403 | {USB_DEVICE(0x2770, 0x9120)}, |
404 | {} | |
405 | }; | |
406 | ||
407 | MODULE_DEVICE_TABLE(usb, device_table); | |
408 | ||
409 | /* sub-driver description */ | |
410 | static const struct sd_desc sd_desc = { | |
411 | .name = MODULE_NAME, | |
412 | .config = sd_config, | |
413 | .init = sd_init, | |
414 | .start = sd_start, | |
415 | .stop0 = sd_stop0, | |
416 | }; | |
417 | ||
418 | /* -- device connect -- */ | |
419 | static int sd_probe(struct usb_interface *intf, | |
420 | const struct usb_device_id *id) | |
421 | { | |
422 | return gspca_dev_probe(intf, id, | |
423 | &sd_desc, | |
424 | sizeof(struct sd), | |
425 | THIS_MODULE); | |
426 | } | |
427 | ||
428 | static struct usb_driver sd_driver = { | |
429 | .name = MODULE_NAME, | |
430 | .id_table = device_table, | |
431 | .probe = sd_probe, | |
432 | .disconnect = gspca_disconnect, | |
433 | #ifdef CONFIG_PM | |
434 | .suspend = gspca_suspend, | |
435 | .resume = gspca_resume, | |
8bb58964 | 436 | .reset_resume = gspca_resume, |
27d35fc3 AB |
437 | #endif |
438 | }; | |
439 | ||
ecb3b2b3 | 440 | module_usb_driver(sd_driver); |