1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Pixart PAC7311 library |
4 | * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li |
5 | * |
6 | * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> |
7 | */ |
8 | |
9 | /* Some documentation about various registers as determined by trial and error. |
10 | * |
11 | * Register page 1: |
12 | * |
13 | * Address Description |
14 | * 0x08 Unknown compressor related, must always be 8 except when not |
15 | * in 640x480 resolution and page 4 reg 2 <= 3 then set it to 9 ! |
16 | * 0x1b Auto white balance related, bit 0 is AWB enable (inverted) |
17 | * bits 345 seem to toggle per color gains on/off (inverted) |
18 | * 0x78 Global control, bit 6 controls the LED (inverted) |
19 | * 0x80 Compression balance, interesting settings: |
20 | * 0x01 Use this to allow the camera to switch to higher compr. |
21 | * on the fly. Needed to stay within bandwidth @ 640x480@30 |
22 | * 0x1c From usb captures under Windows for 640x480 |
23 | * 0x2a Values >= this switch the camera to a lower compression, |
24 | * using the same table for both luminance and chrominance. |
25 | * This gives a sharper picture. Usable only at 640x480@ < |
26 | * 15 fps or 320x240 / 160x120. Note currently the driver |
27 | * does not use this as the quality gain is small and the |
28 | * generated JPG-s are only understood by v4l-utils >= 0.8.9 |
29 | * 0x3f From usb captures under Windows for 320x240 |
30 | * 0x69 From usb captures under Windows for 160x120 |
31 | * |
32 | * Register page 4: |
33 | * |
34 | * Address Description |
35 | * 0x02 Clock divider 2-63, fps =~ 60 / val. Must be a multiple of 3 on |
36 | * the 7302, so one of 3, 6, 9, ..., except when between 6 and 12? |
37 | * 0x0f Master gain 1-245, low value = high gain |
38 | * 0x10 Another gain 0-15, limited influence (1-2x gain I guess) |
39 | * 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused |
40 | * Note setting vflip disabled leads to a much lower image quality, |
41 | * so we always vflip, and tell userspace to flip it back |
42 | * 0x27 Seems to toggle various gains on / off, Setting bit 7 seems to |
43 | * completely disable the analog amplification block. Set to 0x68 |
44 | * for max gain, 0x14 for minimal gain. |
45 | */ |
46 | |
47 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
48 | |
49 | #define MODULE_NAME "pac7311" |
50 | |
51 | #include <linux/input.h> |
52 | #include "gspca.h" |
53 | /* Include pac common sof detection functions */ |
54 | #include "pac_common.h" |
55 | |
56 | #define PAC7311_GAIN_DEFAULT 122 |
57 | #define PAC7311_EXPOSURE_DEFAULT 3 /* 20 fps, avoid using high compr. */ |
58 | |
59 | MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li" ); |
60 | MODULE_DESCRIPTION("Pixart PAC7311" ); |
61 | MODULE_LICENSE("GPL" ); |
62 | |
63 | struct sd { |
64 | struct gspca_dev gspca_dev; /* !! must be the first item */ |
65 | |
66 | struct v4l2_ctrl *contrast; |
67 | struct v4l2_ctrl *hflip; |
68 | |
69 | u8 sof_read; |
70 | u8 autogain_ignore_frames; |
71 | |
72 | atomic_t avg_lum; |
73 | }; |
74 | |
75 | static const struct v4l2_pix_format vga_mode[] = { |
76 | {160, 120, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE, |
77 | .bytesperline = 160, |
78 | .sizeimage = 160 * 120 * 3 / 8 + 590, |
79 | .colorspace = V4L2_COLORSPACE_JPEG, |
80 | .priv = 2}, |
81 | {320, 240, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE, |
82 | .bytesperline = 320, |
83 | .sizeimage = 320 * 240 * 3 / 8 + 590, |
84 | .colorspace = V4L2_COLORSPACE_JPEG, |
85 | .priv = 1}, |
86 | {640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE, |
87 | .bytesperline = 640, |
88 | .sizeimage = 640 * 480 * 3 / 8 + 590, |
89 | .colorspace = V4L2_COLORSPACE_JPEG, |
90 | .priv = 0}, |
91 | }; |
92 | |
93 | #define LOAD_PAGE4 254 |
94 | #define END_OF_SEQUENCE 0 |
95 | |
96 | static const __u8 init_7311[] = { |
97 | 0xff, 0x01, |
98 | 0x78, 0x40, /* Bit_0=start stream, Bit_6=LED */ |
99 | 0x78, 0x40, /* Bit_0=start stream, Bit_6=LED */ |
100 | 0x78, 0x44, /* Bit_0=start stream, Bit_6=LED */ |
101 | 0xff, 0x04, |
102 | 0x27, 0x80, |
103 | 0x28, 0xca, |
104 | 0x29, 0x53, |
105 | 0x2a, 0x0e, |
106 | 0xff, 0x01, |
107 | 0x3e, 0x20, |
108 | }; |
109 | |
110 | static const __u8 start_7311[] = { |
111 | /* index, len, [value]* */ |
112 | 0xff, 1, 0x01, /* page 1 */ |
113 | 0x02, 43, 0x48, 0x0a, 0x40, 0x08, 0x00, 0x00, 0x08, 0x00, |
114 | 0x06, 0xff, 0x11, 0xff, 0x5a, 0x30, 0x90, 0x4c, |
115 | 0x00, 0x07, 0x00, 0x0a, 0x10, 0x00, 0xa0, 0x10, |
116 | 0x02, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x01, 0x00, |
117 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
118 | 0x00, 0x00, 0x00, |
119 | 0x3e, 42, 0x00, 0x00, 0x78, 0x52, 0x4a, 0x52, 0x78, 0x6e, |
120 | 0x48, 0x46, 0x48, 0x6e, 0x5f, 0x49, 0x42, 0x49, |
121 | 0x5f, 0x5f, 0x49, 0x42, 0x49, 0x5f, 0x6e, 0x48, |
122 | 0x46, 0x48, 0x6e, 0x78, 0x52, 0x4a, 0x52, 0x78, |
123 | 0x00, 0x00, 0x09, 0x1b, 0x34, 0x49, 0x5c, 0x9b, |
124 | 0xd0, 0xff, |
125 | 0x78, 6, 0x44, 0x00, 0xf2, 0x01, 0x01, 0x80, |
126 | 0x7f, 18, 0x2a, 0x1c, 0x00, 0xc8, 0x02, 0x58, 0x03, 0x84, |
127 | 0x12, 0x00, 0x1a, 0x04, 0x08, 0x0c, 0x10, 0x14, |
128 | 0x18, 0x20, |
129 | 0x96, 3, 0x01, 0x08, 0x04, |
130 | 0xa0, 4, 0x44, 0x44, 0x44, 0x04, |
131 | 0xf0, 13, 0x01, 0x00, 0x00, 0x00, 0x22, 0x00, 0x20, 0x00, |
132 | 0x3f, 0x00, 0x0a, 0x01, 0x00, |
133 | 0xff, 1, 0x04, /* page 4 */ |
134 | 0, LOAD_PAGE4, /* load the page 4 */ |
135 | 0x11, 1, 0x01, |
136 | 0, END_OF_SEQUENCE /* end of sequence */ |
137 | }; |
138 | |
139 | #define SKIP 0xaa |
140 | /* page 4 - the value SKIP says skip the index - see reg_w_page() */ |
141 | static const __u8 page4_7311[] = { |
142 | SKIP, SKIP, 0x04, 0x54, 0x07, 0x2b, 0x09, 0x0f, |
143 | 0x09, 0x00, SKIP, SKIP, 0x07, 0x00, 0x00, 0x62, |
144 | 0x08, SKIP, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, |
145 | 0x00, 0x00, 0x00, 0x03, 0xa0, 0x01, 0xf4, SKIP, |
146 | SKIP, 0x00, 0x08, SKIP, 0x03, SKIP, 0x00, 0x68, |
147 | 0xca, 0x10, 0x06, 0x78, 0x00, 0x00, 0x00, 0x00, |
148 | 0x23, 0x28, 0x04, 0x11, 0x00, 0x00 |
149 | }; |
150 | |
151 | static void reg_w_buf(struct gspca_dev *gspca_dev, |
152 | __u8 index, |
153 | const u8 *buffer, int len) |
154 | { |
155 | int ret; |
156 | |
157 | if (gspca_dev->usb_err < 0) |
158 | return; |
159 | memcpy(gspca_dev->usb_buf, buffer, len); |
160 | ret = usb_control_msg(dev: gspca_dev->dev, |
161 | usb_sndctrlpipe(gspca_dev->dev, 0), |
162 | request: 0, /* request */ |
163 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
164 | value: 0, /* value */ |
165 | index, data: gspca_dev->usb_buf, size: len, |
166 | timeout: 500); |
167 | if (ret < 0) { |
168 | pr_err("reg_w_buf() failed index 0x%02x, error %d\n" , |
169 | index, ret); |
170 | gspca_dev->usb_err = ret; |
171 | } |
172 | } |
173 | |
174 | |
175 | static void reg_w(struct gspca_dev *gspca_dev, |
176 | __u8 index, |
177 | __u8 value) |
178 | { |
179 | int ret; |
180 | |
181 | if (gspca_dev->usb_err < 0) |
182 | return; |
183 | gspca_dev->usb_buf[0] = value; |
184 | ret = usb_control_msg(dev: gspca_dev->dev, |
185 | usb_sndctrlpipe(gspca_dev->dev, 0), |
186 | request: 0, /* request */ |
187 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
188 | value: 0, index, data: gspca_dev->usb_buf, size: 1, |
189 | timeout: 500); |
190 | if (ret < 0) { |
191 | pr_err("reg_w() failed index 0x%02x, value 0x%02x, error %d\n" , |
192 | index, value, ret); |
193 | gspca_dev->usb_err = ret; |
194 | } |
195 | } |
196 | |
197 | static void reg_w_seq(struct gspca_dev *gspca_dev, |
198 | const __u8 *seq, int len) |
199 | { |
200 | while (--len >= 0) { |
201 | reg_w(gspca_dev, index: seq[0], value: seq[1]); |
202 | seq += 2; |
203 | } |
204 | } |
205 | |
206 | /* load the beginning of a page */ |
207 | static void reg_w_page(struct gspca_dev *gspca_dev, |
208 | const __u8 *page, int len) |
209 | { |
210 | int index; |
211 | int ret = 0; |
212 | |
213 | if (gspca_dev->usb_err < 0) |
214 | return; |
215 | for (index = 0; index < len; index++) { |
216 | if (page[index] == SKIP) /* skip this index */ |
217 | continue; |
218 | gspca_dev->usb_buf[0] = page[index]; |
219 | ret = usb_control_msg(dev: gspca_dev->dev, |
220 | usb_sndctrlpipe(gspca_dev->dev, 0), |
221 | request: 0, /* request */ |
222 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
223 | value: 0, index, data: gspca_dev->usb_buf, size: 1, |
224 | timeout: 500); |
225 | if (ret < 0) { |
226 | pr_err("reg_w_page() failed index 0x%02x, value 0x%02x, error %d\n" , |
227 | index, page[index], ret); |
228 | gspca_dev->usb_err = ret; |
229 | break; |
230 | } |
231 | } |
232 | } |
233 | |
234 | /* output a variable sequence */ |
235 | static void reg_w_var(struct gspca_dev *gspca_dev, |
236 | const __u8 *seq, |
237 | const __u8 *page4, unsigned int page4_len) |
238 | { |
239 | int index, len; |
240 | |
241 | for (;;) { |
242 | index = *seq++; |
243 | len = *seq++; |
244 | switch (len) { |
245 | case END_OF_SEQUENCE: |
246 | return; |
247 | case LOAD_PAGE4: |
248 | reg_w_page(gspca_dev, page: page4, len: page4_len); |
249 | break; |
250 | default: |
251 | if (len > USB_BUF_SZ) { |
252 | gspca_err(gspca_dev, "Incorrect variable sequence\n" ); |
253 | return; |
254 | } |
255 | while (len > 0) { |
256 | if (len < 8) { |
257 | reg_w_buf(gspca_dev, |
258 | index, buffer: seq, len); |
259 | seq += len; |
260 | break; |
261 | } |
262 | reg_w_buf(gspca_dev, index, buffer: seq, len: 8); |
263 | seq += 8; |
264 | index += 8; |
265 | len -= 8; |
266 | } |
267 | } |
268 | } |
269 | /* not reached */ |
270 | } |
271 | |
272 | /* this function is called at probe time for pac7311 */ |
273 | static int sd_config(struct gspca_dev *gspca_dev, |
274 | const struct usb_device_id *id) |
275 | { |
276 | struct cam *cam = &gspca_dev->cam; |
277 | |
278 | cam->cam_mode = vga_mode; |
279 | cam->nmodes = ARRAY_SIZE(vga_mode); |
280 | cam->input_flags = V4L2_IN_ST_VFLIP; |
281 | |
282 | return 0; |
283 | } |
284 | |
285 | static void setcontrast(struct gspca_dev *gspca_dev, s32 val) |
286 | { |
287 | reg_w(gspca_dev, index: 0xff, value: 0x04); |
288 | reg_w(gspca_dev, index: 0x10, value: val); |
289 | /* load registers to sensor (Bit 0, auto clear) */ |
290 | reg_w(gspca_dev, index: 0x11, value: 0x01); |
291 | } |
292 | |
293 | static void setgain(struct gspca_dev *gspca_dev, s32 val) |
294 | { |
295 | reg_w(gspca_dev, index: 0xff, value: 0x04); /* page 4 */ |
296 | reg_w(gspca_dev, index: 0x0e, value: 0x00); |
297 | reg_w(gspca_dev, index: 0x0f, value: gspca_dev->gain->maximum - val + 1); |
298 | |
299 | /* load registers to sensor (Bit 0, auto clear) */ |
300 | reg_w(gspca_dev, index: 0x11, value: 0x01); |
301 | } |
302 | |
303 | static void setexposure(struct gspca_dev *gspca_dev, s32 val) |
304 | { |
305 | reg_w(gspca_dev, index: 0xff, value: 0x04); /* page 4 */ |
306 | reg_w(gspca_dev, index: 0x02, value: val); |
307 | |
308 | /* load registers to sensor (Bit 0, auto clear) */ |
309 | reg_w(gspca_dev, index: 0x11, value: 0x01); |
310 | |
311 | /* |
312 | * Page 1 register 8 must always be 0x08 except when not in |
313 | * 640x480 mode and page 4 reg 2 <= 3 then it must be 9 |
314 | */ |
315 | reg_w(gspca_dev, index: 0xff, value: 0x01); |
316 | if (gspca_dev->pixfmt.width != 640 && val <= 3) |
317 | reg_w(gspca_dev, index: 0x08, value: 0x09); |
318 | else |
319 | reg_w(gspca_dev, index: 0x08, value: 0x08); |
320 | |
321 | /* |
322 | * Page1 register 80 sets the compression balance, normally we |
323 | * want / use 0x1c, but for 640x480@30fps we must allow the |
324 | * camera to use higher compression or we may run out of |
325 | * bandwidth. |
326 | */ |
327 | if (gspca_dev->pixfmt.width == 640 && val == 2) |
328 | reg_w(gspca_dev, index: 0x80, value: 0x01); |
329 | else |
330 | reg_w(gspca_dev, index: 0x80, value: 0x1c); |
331 | |
332 | /* load registers to sensor (Bit 0, auto clear) */ |
333 | reg_w(gspca_dev, index: 0x11, value: 0x01); |
334 | } |
335 | |
336 | static void sethvflip(struct gspca_dev *gspca_dev, s32 hflip, s32 vflip) |
337 | { |
338 | __u8 data; |
339 | |
340 | reg_w(gspca_dev, index: 0xff, value: 0x04); /* page 4 */ |
341 | data = (hflip ? 0x04 : 0x00) | |
342 | (vflip ? 0x08 : 0x00); |
343 | reg_w(gspca_dev, index: 0x21, value: data); |
344 | |
345 | /* load registers to sensor (Bit 0, auto clear) */ |
346 | reg_w(gspca_dev, index: 0x11, value: 0x01); |
347 | } |
348 | |
349 | /* this function is called at probe and resume time for pac7311 */ |
350 | static int sd_init(struct gspca_dev *gspca_dev) |
351 | { |
352 | reg_w_seq(gspca_dev, seq: init_7311, len: sizeof(init_7311)/2); |
353 | return gspca_dev->usb_err; |
354 | } |
355 | |
356 | static int sd_s_ctrl(struct v4l2_ctrl *ctrl) |
357 | { |
358 | struct gspca_dev *gspca_dev = |
359 | container_of(ctrl->handler, struct gspca_dev, ctrl_handler); |
360 | struct sd *sd = (struct sd *)gspca_dev; |
361 | |
362 | gspca_dev->usb_err = 0; |
363 | |
364 | if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) { |
365 | /* when switching to autogain set defaults to make sure |
366 | we are on a valid point of the autogain gain / |
367 | exposure knee graph, and give this change time to |
368 | take effect before doing autogain. */ |
369 | gspca_dev->exposure->val = PAC7311_EXPOSURE_DEFAULT; |
370 | gspca_dev->gain->val = PAC7311_GAIN_DEFAULT; |
371 | sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; |
372 | } |
373 | |
374 | if (!gspca_dev->streaming) |
375 | return 0; |
376 | |
377 | switch (ctrl->id) { |
378 | case V4L2_CID_CONTRAST: |
379 | setcontrast(gspca_dev, val: ctrl->val); |
380 | break; |
381 | case V4L2_CID_AUTOGAIN: |
382 | if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val)) |
383 | setexposure(gspca_dev, val: gspca_dev->exposure->val); |
384 | if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val)) |
385 | setgain(gspca_dev, val: gspca_dev->gain->val); |
386 | break; |
387 | case V4L2_CID_HFLIP: |
388 | sethvflip(gspca_dev, hflip: sd->hflip->val, vflip: 1); |
389 | break; |
390 | default: |
391 | return -EINVAL; |
392 | } |
393 | return gspca_dev->usb_err; |
394 | } |
395 | |
396 | static const struct v4l2_ctrl_ops sd_ctrl_ops = { |
397 | .s_ctrl = sd_s_ctrl, |
398 | }; |
399 | |
400 | /* this function is called at probe time */ |
401 | static int sd_init_controls(struct gspca_dev *gspca_dev) |
402 | { |
403 | struct sd *sd = (struct sd *) gspca_dev; |
404 | struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; |
405 | |
406 | gspca_dev->vdev.ctrl_handler = hdl; |
407 | v4l2_ctrl_handler_init(hdl, 5); |
408 | |
409 | sd->contrast = v4l2_ctrl_new_std(hdl, ops: &sd_ctrl_ops, |
410 | V4L2_CID_CONTRAST, min: 0, max: 15, step: 1, def: 7); |
411 | gspca_dev->autogain = v4l2_ctrl_new_std(hdl, ops: &sd_ctrl_ops, |
412 | V4L2_CID_AUTOGAIN, min: 0, max: 1, step: 1, def: 1); |
413 | gspca_dev->exposure = v4l2_ctrl_new_std(hdl, ops: &sd_ctrl_ops, |
414 | V4L2_CID_EXPOSURE, min: 2, max: 63, step: 1, |
415 | PAC7311_EXPOSURE_DEFAULT); |
416 | gspca_dev->gain = v4l2_ctrl_new_std(hdl, ops: &sd_ctrl_ops, |
417 | V4L2_CID_GAIN, min: 0, max: 244, step: 1, |
418 | PAC7311_GAIN_DEFAULT); |
419 | sd->hflip = v4l2_ctrl_new_std(hdl, ops: &sd_ctrl_ops, |
420 | V4L2_CID_HFLIP, min: 0, max: 1, step: 1, def: 0); |
421 | |
422 | if (hdl->error) { |
423 | pr_err("Could not initialize controls\n" ); |
424 | return hdl->error; |
425 | } |
426 | |
427 | v4l2_ctrl_auto_cluster(ncontrols: 3, controls: &gspca_dev->autogain, manual_val: 0, set_volatile: false); |
428 | return 0; |
429 | } |
430 | |
431 | /* -- start the camera -- */ |
432 | static int sd_start(struct gspca_dev *gspca_dev) |
433 | { |
434 | struct sd *sd = (struct sd *) gspca_dev; |
435 | |
436 | sd->sof_read = 0; |
437 | |
438 | reg_w_var(gspca_dev, seq: start_7311, |
439 | page4: page4_7311, page4_len: sizeof(page4_7311)); |
440 | setcontrast(gspca_dev, val: v4l2_ctrl_g_ctrl(ctrl: sd->contrast)); |
441 | setgain(gspca_dev, val: v4l2_ctrl_g_ctrl(ctrl: gspca_dev->gain)); |
442 | setexposure(gspca_dev, val: v4l2_ctrl_g_ctrl(ctrl: gspca_dev->exposure)); |
443 | sethvflip(gspca_dev, hflip: v4l2_ctrl_g_ctrl(ctrl: sd->hflip), vflip: 1); |
444 | |
445 | /* set correct resolution */ |
446 | switch (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) { |
447 | case 2: /* 160x120 */ |
448 | reg_w(gspca_dev, index: 0xff, value: 0x01); |
449 | reg_w(gspca_dev, index: 0x17, value: 0x20); |
450 | reg_w(gspca_dev, index: 0x87, value: 0x10); |
451 | break; |
452 | case 1: /* 320x240 */ |
453 | reg_w(gspca_dev, index: 0xff, value: 0x01); |
454 | reg_w(gspca_dev, index: 0x17, value: 0x30); |
455 | reg_w(gspca_dev, index: 0x87, value: 0x11); |
456 | break; |
457 | case 0: /* 640x480 */ |
458 | reg_w(gspca_dev, index: 0xff, value: 0x01); |
459 | reg_w(gspca_dev, index: 0x17, value: 0x00); |
460 | reg_w(gspca_dev, index: 0x87, value: 0x12); |
461 | break; |
462 | } |
463 | |
464 | sd->sof_read = 0; |
465 | sd->autogain_ignore_frames = 0; |
466 | atomic_set(v: &sd->avg_lum, i: -1); |
467 | |
468 | /* start stream */ |
469 | reg_w(gspca_dev, index: 0xff, value: 0x01); |
470 | reg_w(gspca_dev, index: 0x78, value: 0x05); |
471 | |
472 | return gspca_dev->usb_err; |
473 | } |
474 | |
475 | static void sd_stopN(struct gspca_dev *gspca_dev) |
476 | { |
477 | reg_w(gspca_dev, index: 0xff, value: 0x04); |
478 | reg_w(gspca_dev, index: 0x27, value: 0x80); |
479 | reg_w(gspca_dev, index: 0x28, value: 0xca); |
480 | reg_w(gspca_dev, index: 0x29, value: 0x53); |
481 | reg_w(gspca_dev, index: 0x2a, value: 0x0e); |
482 | reg_w(gspca_dev, index: 0xff, value: 0x01); |
483 | reg_w(gspca_dev, index: 0x3e, value: 0x20); |
484 | reg_w(gspca_dev, index: 0x78, value: 0x44); /* Bit_0=start stream, Bit_6=LED */ |
485 | reg_w(gspca_dev, index: 0x78, value: 0x44); /* Bit_0=start stream, Bit_6=LED */ |
486 | reg_w(gspca_dev, index: 0x78, value: 0x44); /* Bit_0=start stream, Bit_6=LED */ |
487 | } |
488 | |
489 | static void do_autogain(struct gspca_dev *gspca_dev) |
490 | { |
491 | struct sd *sd = (struct sd *) gspca_dev; |
492 | int avg_lum = atomic_read(v: &sd->avg_lum); |
493 | int desired_lum, deadzone; |
494 | |
495 | if (avg_lum == -1) |
496 | return; |
497 | |
498 | desired_lum = 170; |
499 | deadzone = 20; |
500 | |
501 | if (sd->autogain_ignore_frames > 0) |
502 | sd->autogain_ignore_frames--; |
503 | else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum, |
504 | desired_avg_lum: desired_lum, deadzone)) |
505 | sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; |
506 | } |
507 | |
508 | /* JPEG header, part 1 */ |
509 | static const unsigned char [] = { |
510 | 0xff, 0xd8, /* SOI: Start of Image */ |
511 | |
512 | 0xff, 0xc0, /* SOF0: Start of Frame (Baseline DCT) */ |
513 | 0x00, 0x11, /* length = 17 bytes (including this length field) */ |
514 | 0x08 /* Precision: 8 */ |
515 | /* 2 bytes is placed here: number of image lines */ |
516 | /* 2 bytes is placed here: samples per line */ |
517 | }; |
518 | |
519 | /* JPEG header, continued */ |
520 | static const unsigned char [] = { |
521 | 0x03, /* Number of image components: 3 */ |
522 | 0x01, 0x21, 0x00, /* ID=1, Subsampling 1x1, Quantization table: 0 */ |
523 | 0x02, 0x11, 0x01, /* ID=2, Subsampling 2x1, Quantization table: 1 */ |
524 | 0x03, 0x11, 0x01, /* ID=3, Subsampling 2x1, Quantization table: 1 */ |
525 | |
526 | 0xff, 0xda, /* SOS: Start Of Scan */ |
527 | 0x00, 0x0c, /* length = 12 bytes (including this length field) */ |
528 | 0x03, /* number of components: 3 */ |
529 | 0x01, 0x00, /* selector 1, table 0x00 */ |
530 | 0x02, 0x11, /* selector 2, table 0x11 */ |
531 | 0x03, 0x11, /* selector 3, table 0x11 */ |
532 | 0x00, 0x3f, /* Spectral selection: 0 .. 63 */ |
533 | 0x00 /* Successive approximation: 0 */ |
534 | }; |
535 | |
536 | static void pac_start_frame(struct gspca_dev *gspca_dev, |
537 | __u16 lines, __u16 samples_per_line) |
538 | { |
539 | unsigned char tmpbuf[4]; |
540 | |
541 | gspca_frame_add(gspca_dev, packet_type: FIRST_PACKET, |
542 | data: pac_jpeg_header1, len: sizeof(pac_jpeg_header1)); |
543 | |
544 | tmpbuf[0] = lines >> 8; |
545 | tmpbuf[1] = lines & 0xff; |
546 | tmpbuf[2] = samples_per_line >> 8; |
547 | tmpbuf[3] = samples_per_line & 0xff; |
548 | |
549 | gspca_frame_add(gspca_dev, packet_type: INTER_PACKET, |
550 | data: tmpbuf, len: sizeof(tmpbuf)); |
551 | gspca_frame_add(gspca_dev, packet_type: INTER_PACKET, |
552 | data: pac_jpeg_header2, len: sizeof(pac_jpeg_header2)); |
553 | } |
554 | |
555 | /* this function is run at interrupt level */ |
556 | static void sd_pkt_scan(struct gspca_dev *gspca_dev, |
557 | u8 *data, /* isoc packet */ |
558 | int len) /* iso packet length */ |
559 | { |
560 | struct sd *sd = (struct sd *) gspca_dev; |
561 | u8 *image; |
562 | unsigned char *sof; |
563 | |
564 | sof = pac_find_sof(gspca_dev, sof_read: &sd->sof_read, m: data, len); |
565 | if (sof) { |
566 | int n, lum_offset, ; |
567 | |
568 | /* |
569 | * 6 bytes after the FF D9 EOF marker a number of lumination |
570 | * bytes are send corresponding to different parts of the |
571 | * image, the 14th and 15th byte after the EOF seem to |
572 | * correspond to the center of the image. |
573 | */ |
574 | lum_offset = 24 + sizeof pac_sof_marker; |
575 | footer_length = 26; |
576 | |
577 | /* Finish decoding current frame */ |
578 | n = (sof - data) - (footer_length + sizeof pac_sof_marker); |
579 | if (n < 0) { |
580 | gspca_dev->image_len += n; |
581 | n = 0; |
582 | } else { |
583 | gspca_frame_add(gspca_dev, packet_type: INTER_PACKET, data, len: n); |
584 | } |
585 | image = gspca_dev->image; |
586 | if (image != NULL |
587 | && image[gspca_dev->image_len - 2] == 0xff |
588 | && image[gspca_dev->image_len - 1] == 0xd9) |
589 | gspca_frame_add(gspca_dev, packet_type: LAST_PACKET, NULL, len: 0); |
590 | |
591 | n = sof - data; |
592 | len -= n; |
593 | data = sof; |
594 | |
595 | /* Get average lumination */ |
596 | if (gspca_dev->last_packet_type == LAST_PACKET && |
597 | n >= lum_offset) |
598 | atomic_set(v: &sd->avg_lum, i: data[-lum_offset] + |
599 | data[-lum_offset + 1]); |
600 | else |
601 | atomic_set(v: &sd->avg_lum, i: -1); |
602 | |
603 | /* Start the new frame with the jpeg header */ |
604 | pac_start_frame(gspca_dev, |
605 | lines: gspca_dev->pixfmt.height, samples_per_line: gspca_dev->pixfmt.width); |
606 | } |
607 | gspca_frame_add(gspca_dev, packet_type: INTER_PACKET, data, len); |
608 | } |
609 | |
610 | #if IS_ENABLED(CONFIG_INPUT) |
611 | static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, |
612 | u8 *data, /* interrupt packet data */ |
613 | int len) /* interrupt packet length */ |
614 | { |
615 | int ret = -EINVAL; |
616 | u8 data0, data1; |
617 | |
618 | if (len == 2) { |
619 | data0 = data[0]; |
620 | data1 = data[1]; |
621 | if ((data0 == 0x00 && data1 == 0x11) || |
622 | (data0 == 0x22 && data1 == 0x33) || |
623 | (data0 == 0x44 && data1 == 0x55) || |
624 | (data0 == 0x66 && data1 == 0x77) || |
625 | (data0 == 0x88 && data1 == 0x99) || |
626 | (data0 == 0xaa && data1 == 0xbb) || |
627 | (data0 == 0xcc && data1 == 0xdd) || |
628 | (data0 == 0xee && data1 == 0xff)) { |
629 | input_report_key(dev: gspca_dev->input_dev, KEY_CAMERA, value: 1); |
630 | input_sync(dev: gspca_dev->input_dev); |
631 | input_report_key(dev: gspca_dev->input_dev, KEY_CAMERA, value: 0); |
632 | input_sync(dev: gspca_dev->input_dev); |
633 | ret = 0; |
634 | } |
635 | } |
636 | |
637 | return ret; |
638 | } |
639 | #endif |
640 | |
641 | static const struct sd_desc sd_desc = { |
642 | .name = MODULE_NAME, |
643 | .config = sd_config, |
644 | .init = sd_init, |
645 | .init_controls = sd_init_controls, |
646 | .start = sd_start, |
647 | .stopN = sd_stopN, |
648 | .pkt_scan = sd_pkt_scan, |
649 | .dq_callback = do_autogain, |
650 | #if IS_ENABLED(CONFIG_INPUT) |
651 | .int_pkt_scan = sd_int_pkt_scan, |
652 | #endif |
653 | }; |
654 | |
655 | /* -- module initialisation -- */ |
656 | static const struct usb_device_id device_table[] = { |
657 | {USB_DEVICE(0x093a, 0x2600)}, |
658 | {USB_DEVICE(0x093a, 0x2601)}, |
659 | {USB_DEVICE(0x093a, 0x2603)}, |
660 | {USB_DEVICE(0x093a, 0x2608)}, |
661 | {USB_DEVICE(0x093a, 0x260e)}, |
662 | {USB_DEVICE(0x093a, 0x260f)}, |
663 | {} |
664 | }; |
665 | MODULE_DEVICE_TABLE(usb, device_table); |
666 | |
667 | /* -- device connect -- */ |
668 | static int sd_probe(struct usb_interface *intf, |
669 | const struct usb_device_id *id) |
670 | { |
671 | return gspca_dev_probe(intf, id, sd_desc: &sd_desc, dev_size: sizeof(struct sd), |
672 | THIS_MODULE); |
673 | } |
674 | |
675 | static struct usb_driver sd_driver = { |
676 | .name = MODULE_NAME, |
677 | .id_table = device_table, |
678 | .probe = sd_probe, |
679 | .disconnect = gspca_disconnect, |
680 | #ifdef CONFIG_PM |
681 | .suspend = gspca_suspend, |
682 | .resume = gspca_resume, |
683 | .reset_resume = gspca_resume, |
684 | #endif |
685 | }; |
686 | |
687 | module_usb_driver(sd_driver); |
688 | |