]>
Commit | Line | Data |
---|---|---|
9cb2173e EG |
1 | /* |
2 | * STK1160 driver | |
3 | * | |
4 | * Copyright (C) 2012 Ezequiel Garcia | |
5 | * <elezegarcia--a.t--gmail.com> | |
6 | * | |
7 | * Based on Easycap driver by R.M. Thomas | |
8 | * Copyright (C) 2010 R.M. Thomas | |
9 | * <rmthomas--a.t--sciolus.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/slab.h> | |
27 | ||
28 | #include <linux/videodev2.h> | |
29 | #include <media/v4l2-device.h> | |
30 | #include <media/v4l2-common.h> | |
31 | #include <media/v4l2-ioctl.h> | |
32 | #include <media/v4l2-fh.h> | |
33 | #include <media/v4l2-event.h> | |
9cb2173e EG |
34 | #include <media/videobuf2-vmalloc.h> |
35 | ||
b5dcee22 | 36 | #include <media/i2c/saa7115.h> |
9cb2173e EG |
37 | |
38 | #include "stk1160.h" | |
39 | #include "stk1160-reg.h" | |
40 | ||
9cb2173e EG |
41 | static bool keep_buffers; |
42 | module_param(keep_buffers, bool, 0644); | |
43 | MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming"); | |
44 | ||
d3194520 EG |
45 | enum stk1160_decimate_mode { |
46 | STK1160_DECIMATE_MORE_THAN_HALF, | |
47 | STK1160_DECIMATE_LESS_THAN_HALF, | |
48 | }; | |
49 | ||
50 | struct stk1160_decimate_ctrl { | |
51 | bool col_en, row_en; | |
52 | enum stk1160_decimate_mode col_mode, row_mode; | |
53 | unsigned int col_n, row_n; | |
54 | }; | |
55 | ||
9cb2173e EG |
56 | /* supported video standards */ |
57 | static struct stk1160_fmt format[] = { | |
58 | { | |
59 | .name = "16 bpp YUY2, 4:2:2, packed", | |
60 | .fourcc = V4L2_PIX_FMT_UYVY, | |
61 | .depth = 16, | |
62 | } | |
63 | }; | |
64 | ||
d3194520 EG |
65 | /* |
66 | * Helper to find the next divisor that results in modulo being zero. | |
67 | * This is required to guarantee valid decimation unit counts. | |
68 | */ | |
69 | static unsigned int | |
70 | div_round_integer(unsigned int x, unsigned int y) | |
71 | { | |
72 | for (;; y++) { | |
73 | if (x % y == 0) | |
74 | return x / y; | |
75 | } | |
76 | } | |
77 | ||
9cb2173e EG |
78 | static void stk1160_set_std(struct stk1160 *dev) |
79 | { | |
80 | int i; | |
81 | ||
82 | static struct regval std525[] = { | |
83 | ||
84 | /* 720x480 */ | |
85 | ||
86 | /* Frame start */ | |
87 | {STK116_CFSPO_STX_L, 0x0000}, | |
88 | {STK116_CFSPO_STX_H, 0x0000}, | |
89 | {STK116_CFSPO_STY_L, 0x0003}, | |
90 | {STK116_CFSPO_STY_H, 0x0000}, | |
91 | ||
92 | /* Frame end */ | |
93 | {STK116_CFEPO_ENX_L, 0x05a0}, | |
94 | {STK116_CFEPO_ENX_H, 0x0005}, | |
95 | {STK116_CFEPO_ENY_L, 0x00f3}, | |
96 | {STK116_CFEPO_ENY_H, 0x0000}, | |
97 | ||
98 | {0xffff, 0xffff} | |
99 | }; | |
100 | ||
101 | static struct regval std625[] = { | |
102 | ||
103 | /* 720x576 */ | |
104 | ||
105 | /* TODO: Each line of frame has some junk at the end */ | |
106 | /* Frame start */ | |
107 | {STK116_CFSPO, 0x0000}, | |
108 | {STK116_CFSPO+1, 0x0000}, | |
109 | {STK116_CFSPO+2, 0x0001}, | |
110 | {STK116_CFSPO+3, 0x0000}, | |
111 | ||
112 | /* Frame end */ | |
113 | {STK116_CFEPO, 0x05a0}, | |
114 | {STK116_CFEPO+1, 0x0005}, | |
115 | {STK116_CFEPO+2, 0x0121}, | |
116 | {STK116_CFEPO+3, 0x0001}, | |
117 | ||
118 | {0xffff, 0xffff} | |
119 | }; | |
120 | ||
121 | if (dev->norm & V4L2_STD_525_60) { | |
122 | stk1160_dbg("registers to NTSC like standard\n"); | |
123 | for (i = 0; std525[i].reg != 0xffff; i++) | |
124 | stk1160_write_reg(dev, std525[i].reg, std525[i].val); | |
125 | } else { | |
126 | stk1160_dbg("registers to PAL like standard\n"); | |
127 | for (i = 0; std625[i].reg != 0xffff; i++) | |
128 | stk1160_write_reg(dev, std625[i].reg, std625[i].val); | |
129 | } | |
130 | ||
131 | } | |
132 | ||
d3194520 EG |
133 | static void stk1160_set_fmt(struct stk1160 *dev, |
134 | struct stk1160_decimate_ctrl *ctrl) | |
135 | { | |
136 | u32 val = 0; | |
137 | ||
138 | if (ctrl) { | |
139 | /* | |
140 | * Since the format is UYVY, the device must skip or send | |
141 | * a number of rows/columns multiple of four. This way, the | |
142 | * colour format is preserved. The STK1160_DEC_UNIT_SIZE bit | |
143 | * does exactly this. | |
144 | */ | |
145 | val |= STK1160_DEC_UNIT_SIZE; | |
146 | val |= ctrl->col_en ? STK1160_H_DEC_EN : 0; | |
147 | val |= ctrl->row_en ? STK1160_V_DEC_EN : 0; | |
148 | val |= ctrl->col_mode == | |
149 | STK1160_DECIMATE_MORE_THAN_HALF ? | |
150 | STK1160_H_DEC_MODE : 0; | |
151 | val |= ctrl->row_mode == | |
152 | STK1160_DECIMATE_MORE_THAN_HALF ? | |
153 | STK1160_V_DEC_MODE : 0; | |
154 | ||
155 | /* Horizontal count units */ | |
156 | stk1160_write_reg(dev, STK1160_DMCTRL_H_UNITS, ctrl->col_n); | |
157 | /* Vertical count units */ | |
158 | stk1160_write_reg(dev, STK1160_DMCTRL_V_UNITS, ctrl->row_n); | |
159 | ||
160 | stk1160_dbg("decimate 0x%x, column units %d, row units %d\n", | |
161 | val, ctrl->col_n, ctrl->row_n); | |
162 | } | |
163 | ||
164 | /* Decimation control */ | |
165 | stk1160_write_reg(dev, STK1160_DMCTRL, val); | |
166 | } | |
167 | ||
9cb2173e EG |
168 | /* |
169 | * Set a new alternate setting. | |
170 | * Returns true is dev->max_pkt_size has changed, false otherwise. | |
171 | */ | |
172 | static bool stk1160_set_alternate(struct stk1160 *dev) | |
173 | { | |
174 | int i, prev_alt = dev->alt; | |
175 | unsigned int min_pkt_size; | |
176 | bool new_pkt_size; | |
177 | ||
178 | /* | |
179 | * If we don't set right alternate, | |
180 | * then we will get a green screen with junk. | |
181 | */ | |
182 | min_pkt_size = STK1160_MIN_PKT_SIZE; | |
183 | ||
184 | for (i = 0; i < dev->num_alt; i++) { | |
185 | /* stop when the selected alt setting offers enough bandwidth */ | |
186 | if (dev->alt_max_pkt_size[i] >= min_pkt_size) { | |
187 | dev->alt = i; | |
188 | break; | |
189 | /* | |
190 | * otherwise make sure that we end up with the maximum bandwidth | |
191 | * because the min_pkt_size equation might be wrong... | |
192 | */ | |
193 | } else if (dev->alt_max_pkt_size[i] > | |
194 | dev->alt_max_pkt_size[dev->alt]) | |
195 | dev->alt = i; | |
196 | } | |
197 | ||
890024ad | 198 | stk1160_dbg("setting alternate %d\n", dev->alt); |
9cb2173e EG |
199 | |
200 | if (dev->alt != prev_alt) { | |
201 | stk1160_dbg("minimum isoc packet size: %u (alt=%d)\n", | |
202 | min_pkt_size, dev->alt); | |
203 | stk1160_dbg("setting alt %d with wMaxPacketSize=%u\n", | |
204 | dev->alt, dev->alt_max_pkt_size[dev->alt]); | |
205 | usb_set_interface(dev->udev, 0, dev->alt); | |
206 | } | |
207 | ||
208 | new_pkt_size = dev->max_pkt_size != dev->alt_max_pkt_size[dev->alt]; | |
209 | dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; | |
210 | ||
211 | return new_pkt_size; | |
212 | } | |
213 | ||
214 | static int stk1160_start_streaming(struct stk1160 *dev) | |
215 | { | |
9cb2173e | 216 | bool new_pkt_size; |
f367cc1e DC |
217 | int rc = 0; |
218 | int i; | |
9cb2173e EG |
219 | |
220 | /* Check device presence */ | |
221 | if (!dev->udev) | |
222 | return -ENODEV; | |
223 | ||
224 | if (mutex_lock_interruptible(&dev->v4l_lock)) | |
225 | return -ERESTARTSYS; | |
226 | /* | |
227 | * For some reason it is mandatory to set alternate *first* | |
228 | * and only *then* initialize isoc urbs. | |
229 | * Someone please explain me why ;) | |
230 | */ | |
231 | new_pkt_size = stk1160_set_alternate(dev); | |
232 | ||
233 | /* | |
234 | * We (re)allocate isoc urbs if: | |
235 | * there is no allocated isoc urbs, OR | |
236 | * a new dev->max_pkt_size is detected | |
237 | */ | |
238 | if (!dev->isoc_ctl.num_bufs || new_pkt_size) { | |
239 | rc = stk1160_alloc_isoc(dev); | |
240 | if (rc < 0) | |
8ac45649 | 241 | goto out_stop_hw; |
9cb2173e EG |
242 | } |
243 | ||
244 | /* submit urbs and enables IRQ */ | |
245 | for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { | |
246 | rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_KERNEL); | |
247 | if (rc) { | |
248 | stk1160_err("cannot submit urb[%d] (%d)\n", i, rc); | |
8ac45649 | 249 | goto out_uninit; |
9cb2173e EG |
250 | } |
251 | } | |
252 | ||
253 | /* Start saa711x */ | |
254 | v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1); | |
255 | ||
e3e30f63 HV |
256 | dev->sequence = 0; |
257 | ||
9cb2173e EG |
258 | /* Start stk1160 */ |
259 | stk1160_write_reg(dev, STK1160_DCTRL, 0xb3); | |
260 | stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00); | |
261 | ||
262 | stk1160_dbg("streaming started\n"); | |
263 | ||
8ac45649 EG |
264 | mutex_unlock(&dev->v4l_lock); |
265 | ||
266 | return 0; | |
267 | ||
268 | out_uninit: | |
269 | stk1160_uninit_isoc(dev); | |
270 | out_stop_hw: | |
271 | usb_set_interface(dev->udev, 0, 0); | |
272 | stk1160_clear_queue(dev); | |
273 | ||
9cb2173e EG |
274 | mutex_unlock(&dev->v4l_lock); |
275 | ||
f367cc1e | 276 | return rc; |
9cb2173e EG |
277 | } |
278 | ||
279 | /* Must be called with v4l_lock hold */ | |
280 | static void stk1160_stop_hw(struct stk1160 *dev) | |
281 | { | |
282 | /* If the device is not physically present, there is nothing to do */ | |
283 | if (!dev->udev) | |
284 | return; | |
285 | ||
286 | /* set alternate 0 */ | |
287 | dev->alt = 0; | |
890024ad | 288 | stk1160_dbg("setting alternate %d\n", dev->alt); |
9cb2173e EG |
289 | usb_set_interface(dev->udev, 0, 0); |
290 | ||
291 | /* Stop stk1160 */ | |
292 | stk1160_write_reg(dev, STK1160_DCTRL, 0x00); | |
293 | stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00); | |
294 | ||
295 | /* Stop saa711x */ | |
296 | v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0); | |
297 | } | |
298 | ||
299 | static int stk1160_stop_streaming(struct stk1160 *dev) | |
300 | { | |
301 | if (mutex_lock_interruptible(&dev->v4l_lock)) | |
302 | return -ERESTARTSYS; | |
303 | ||
aeff0927 EG |
304 | /* |
305 | * Once URBs are cancelled, the URB complete handler | |
306 | * won't be running. This is required to safely release the | |
307 | * current buffer (dev->isoc_ctl.buf). | |
308 | */ | |
9cb2173e EG |
309 | stk1160_cancel_isoc(dev); |
310 | ||
311 | /* | |
312 | * It is possible to keep buffers around using a module parameter. | |
313 | * This is intended to avoid memory fragmentation. | |
314 | */ | |
315 | if (!keep_buffers) | |
316 | stk1160_free_isoc(dev); | |
317 | ||
318 | stk1160_stop_hw(dev); | |
319 | ||
320 | stk1160_clear_queue(dev); | |
321 | ||
322 | stk1160_dbg("streaming stopped\n"); | |
323 | ||
324 | mutex_unlock(&dev->v4l_lock); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | static struct v4l2_file_operations stk1160_fops = { | |
330 | .owner = THIS_MODULE, | |
331 | .open = v4l2_fh_open, | |
332 | .release = vb2_fop_release, | |
333 | .read = vb2_fop_read, | |
334 | .poll = vb2_fop_poll, | |
335 | .mmap = vb2_fop_mmap, | |
336 | .unlocked_ioctl = video_ioctl2, | |
337 | }; | |
338 | ||
339 | /* | |
340 | * vidioc ioctls | |
341 | */ | |
342 | static int vidioc_querycap(struct file *file, | |
343 | void *priv, struct v4l2_capability *cap) | |
344 | { | |
345 | struct stk1160 *dev = video_drvdata(file); | |
346 | ||
347 | strcpy(cap->driver, "stk1160"); | |
348 | strcpy(cap->card, "stk1160"); | |
349 | usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); | |
350 | cap->device_caps = | |
351 | V4L2_CAP_VIDEO_CAPTURE | | |
352 | V4L2_CAP_STREAMING | | |
353 | V4L2_CAP_READWRITE; | |
354 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, | |
359 | struct v4l2_fmtdesc *f) | |
360 | { | |
361 | if (f->index != 0) | |
362 | return -EINVAL; | |
363 | ||
364 | strlcpy(f->description, format[f->index].name, sizeof(f->description)); | |
365 | f->pixelformat = format[f->index].fourcc; | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, | |
370 | struct v4l2_format *f) | |
371 | { | |
372 | struct stk1160 *dev = video_drvdata(file); | |
373 | ||
374 | f->fmt.pix.width = dev->width; | |
375 | f->fmt.pix.height = dev->height; | |
376 | f->fmt.pix.field = V4L2_FIELD_INTERLACED; | |
377 | f->fmt.pix.pixelformat = dev->fmt->fourcc; | |
378 | f->fmt.pix.bytesperline = dev->width * 2; | |
379 | f->fmt.pix.sizeimage = dev->height * f->fmt.pix.bytesperline; | |
380 | f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
d3194520 EG |
385 | static int stk1160_try_fmt(struct stk1160 *dev, struct v4l2_format *f, |
386 | struct stk1160_decimate_ctrl *ctrl) | |
9cb2173e | 387 | { |
d3194520 EG |
388 | unsigned int width, height; |
389 | unsigned int base_width, base_height; | |
390 | unsigned int col_n, row_n; | |
391 | enum stk1160_decimate_mode col_mode, row_mode; | |
392 | bool col_en, row_en; | |
393 | ||
394 | base_width = 720; | |
395 | base_height = (dev->norm & V4L2_STD_525_60) ? 480 : 576; | |
396 | ||
397 | /* Minimum width and height is 5% the frame size */ | |
398 | width = clamp_t(unsigned int, f->fmt.pix.width, | |
399 | base_width / 20, base_width); | |
400 | height = clamp_t(unsigned int, f->fmt.pix.height, | |
401 | base_height / 20, base_height); | |
402 | ||
403 | /* Let's set default no decimation values */ | |
404 | col_n = 0; | |
405 | row_n = 0; | |
406 | col_en = false; | |
407 | row_en = false; | |
408 | f->fmt.pix.width = base_width; | |
409 | f->fmt.pix.height = base_height; | |
410 | row_mode = STK1160_DECIMATE_LESS_THAN_HALF; | |
411 | col_mode = STK1160_DECIMATE_LESS_THAN_HALF; | |
412 | ||
413 | if (width < base_width && width > base_width / 2) { | |
414 | /* | |
415 | * The device will send count units for each | |
416 | * unit skipped. This means count unit is: | |
417 | * | |
418 | * n = width / (frame width - width) | |
419 | * | |
420 | * And the width is: | |
421 | * | |
422 | * width = (n / n + 1) * frame width | |
423 | */ | |
424 | col_n = div_round_integer(width, base_width - width); | |
425 | if (col_n > 0 && col_n <= 255) { | |
426 | col_en = true; | |
427 | col_mode = STK1160_DECIMATE_LESS_THAN_HALF; | |
428 | f->fmt.pix.width = (base_width * col_n) / (col_n + 1); | |
429 | } | |
9cb2173e | 430 | |
d3194520 EG |
431 | } else if (width <= base_width / 2) { |
432 | ||
433 | /* | |
434 | * The device will skip count units for each | |
435 | * unit sent. This means count is: | |
436 | * | |
437 | * n = (frame width / width) - 1 | |
438 | * | |
439 | * And the width is: | |
440 | * | |
441 | * width = frame width / (n + 1) | |
442 | */ | |
443 | col_n = div_round_integer(base_width, width) - 1; | |
444 | if (col_n > 0 && col_n <= 255) { | |
445 | col_en = true; | |
446 | col_mode = STK1160_DECIMATE_MORE_THAN_HALF; | |
447 | f->fmt.pix.width = base_width / (col_n + 1); | |
448 | } | |
449 | } | |
450 | ||
451 | if (height < base_height && height > base_height / 2) { | |
452 | row_n = div_round_integer(height, base_height - height); | |
453 | if (row_n > 0 && row_n <= 255) { | |
454 | row_en = true; | |
455 | row_mode = STK1160_DECIMATE_LESS_THAN_HALF; | |
456 | f->fmt.pix.height = (base_height * row_n) / (row_n + 1); | |
457 | } | |
458 | ||
459 | } else if (height <= base_height / 2) { | |
460 | row_n = div_round_integer(base_height, height) - 1; | |
461 | if (row_n > 0 && row_n <= 255) { | |
462 | row_en = true; | |
463 | row_mode = STK1160_DECIMATE_MORE_THAN_HALF; | |
464 | f->fmt.pix.height = base_height / (row_n + 1); | |
465 | } | |
466 | } | |
9cb2173e | 467 | |
c6b69c6c | 468 | f->fmt.pix.pixelformat = dev->fmt->fourcc; |
9cb2173e | 469 | f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
d3194520 EG |
470 | f->fmt.pix.bytesperline = f->fmt.pix.width * 2; |
471 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; | |
9cb2173e EG |
472 | f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
473 | ||
d3194520 EG |
474 | if (ctrl) { |
475 | ctrl->col_en = col_en; | |
476 | ctrl->col_n = col_n; | |
477 | ctrl->col_mode = col_mode; | |
478 | ctrl->row_en = row_en; | |
479 | ctrl->row_n = row_n; | |
480 | ctrl->row_mode = row_mode; | |
481 | } | |
482 | ||
483 | stk1160_dbg("width %d, height %d\n", | |
484 | f->fmt.pix.width, f->fmt.pix.height); | |
9cb2173e EG |
485 | return 0; |
486 | } | |
487 | ||
d3194520 EG |
488 | static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, |
489 | struct v4l2_format *f) | |
490 | { | |
491 | struct stk1160 *dev = video_drvdata(file); | |
492 | ||
493 | return stk1160_try_fmt(dev, f, NULL); | |
494 | } | |
495 | ||
9cb2173e EG |
496 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
497 | struct v4l2_format *f) | |
498 | { | |
499 | struct stk1160 *dev = video_drvdata(file); | |
500 | struct vb2_queue *q = &dev->vb_vidq; | |
d3194520 EG |
501 | struct stk1160_decimate_ctrl ctrl; |
502 | int rc; | |
9cb2173e EG |
503 | |
504 | if (vb2_is_busy(q)) | |
505 | return -EBUSY; | |
506 | ||
d3194520 EG |
507 | rc = stk1160_try_fmt(dev, f, &ctrl); |
508 | if (rc < 0) | |
509 | return rc; | |
510 | dev->width = f->fmt.pix.width; | |
511 | dev->height = f->fmt.pix.height; | |
512 | stk1160_set_fmt(dev, &ctrl); | |
9cb2173e EG |
513 | |
514 | return 0; | |
515 | } | |
516 | ||
517 | static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) | |
518 | { | |
519 | struct stk1160 *dev = video_drvdata(file); | |
520 | v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); | |
521 | return 0; | |
522 | } | |
523 | ||
524 | static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) | |
525 | { | |
526 | struct stk1160 *dev = video_drvdata(file); | |
527 | ||
528 | *norm = dev->norm; | |
529 | return 0; | |
530 | } | |
531 | ||
314527ac | 532 | static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) |
9cb2173e EG |
533 | { |
534 | struct stk1160 *dev = video_drvdata(file); | |
535 | struct vb2_queue *q = &dev->vb_vidq; | |
536 | ||
b3ba8fa6 EG |
537 | if (dev->norm == norm) |
538 | return 0; | |
539 | ||
9cb2173e EG |
540 | if (vb2_is_busy(q)) |
541 | return -EBUSY; | |
542 | ||
543 | /* Check device presence */ | |
544 | if (!dev->udev) | |
545 | return -ENODEV; | |
546 | ||
547 | /* We need to set this now, before we call stk1160_set_std */ | |
d3194520 EG |
548 | dev->width = 720; |
549 | dev->height = (norm & V4L2_STD_525_60) ? 480 : 576; | |
314527ac | 550 | dev->norm = norm; |
9cb2173e | 551 | |
9cb2173e EG |
552 | stk1160_set_std(dev); |
553 | ||
d3194520 EG |
554 | /* Calling with NULL disables frame decimation */ |
555 | stk1160_set_fmt(dev, NULL); | |
556 | ||
8774bed9 | 557 | v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, |
9cb2173e EG |
558 | dev->norm); |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | ||
564 | static int vidioc_enum_input(struct file *file, void *priv, | |
565 | struct v4l2_input *i) | |
566 | { | |
567 | struct stk1160 *dev = video_drvdata(file); | |
568 | ||
569 | if (i->index > STK1160_MAX_INPUT) | |
570 | return -EINVAL; | |
571 | ||
56a960bf EG |
572 | /* S-Video special handling */ |
573 | if (i->index == STK1160_SVIDEO_INPUT) | |
574 | sprintf(i->name, "S-Video"); | |
575 | else | |
576 | sprintf(i->name, "Composite%d", i->index); | |
577 | ||
9cb2173e EG |
578 | i->type = V4L2_INPUT_TYPE_CAMERA; |
579 | i->std = dev->vdev.tvnorms; | |
580 | return 0; | |
581 | } | |
582 | ||
583 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
584 | { | |
585 | struct stk1160 *dev = video_drvdata(file); | |
586 | *i = dev->ctl_input; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
591 | { | |
592 | struct stk1160 *dev = video_drvdata(file); | |
593 | ||
9cb2173e EG |
594 | if (i > STK1160_MAX_INPUT) |
595 | return -EINVAL; | |
596 | ||
597 | dev->ctl_input = i; | |
598 | ||
599 | stk1160_select_input(dev); | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
9cb2173e EG |
604 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
605 | static int vidioc_g_register(struct file *file, void *priv, | |
606 | struct v4l2_dbg_register *reg) | |
607 | { | |
608 | struct stk1160 *dev = video_drvdata(file); | |
609 | int rc; | |
610 | u8 val; | |
611 | ||
9cb2173e EG |
612 | /* Match host */ |
613 | rc = stk1160_read_reg(dev, reg->reg, &val); | |
614 | reg->val = val; | |
615 | reg->size = 1; | |
616 | ||
617 | return rc; | |
618 | } | |
619 | ||
620 | static int vidioc_s_register(struct file *file, void *priv, | |
977ba3b1 | 621 | const struct v4l2_dbg_register *reg) |
9cb2173e EG |
622 | { |
623 | struct stk1160 *dev = video_drvdata(file); | |
624 | ||
9cb2173e | 625 | /* Match host */ |
4580278f | 626 | return stk1160_write_reg(dev, reg->reg, reg->val); |
9cb2173e EG |
627 | } |
628 | #endif | |
629 | ||
630 | static const struct v4l2_ioctl_ops stk1160_ioctl_ops = { | |
631 | .vidioc_querycap = vidioc_querycap, | |
632 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, | |
633 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
634 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
635 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
636 | .vidioc_querystd = vidioc_querystd, | |
637 | .vidioc_g_std = vidioc_g_std, | |
638 | .vidioc_s_std = vidioc_s_std, | |
639 | .vidioc_enum_input = vidioc_enum_input, | |
640 | .vidioc_g_input = vidioc_g_input, | |
641 | .vidioc_s_input = vidioc_s_input, | |
642 | ||
643 | /* vb2 takes care of these */ | |
644 | .vidioc_reqbufs = vb2_ioctl_reqbufs, | |
645 | .vidioc_querybuf = vb2_ioctl_querybuf, | |
646 | .vidioc_qbuf = vb2_ioctl_qbuf, | |
647 | .vidioc_dqbuf = vb2_ioctl_dqbuf, | |
648 | .vidioc_streamon = vb2_ioctl_streamon, | |
649 | .vidioc_streamoff = vb2_ioctl_streamoff, | |
ebbb5637 | 650 | .vidioc_expbuf = vb2_ioctl_expbuf, |
9cb2173e EG |
651 | |
652 | .vidioc_log_status = v4l2_ctrl_log_status, | |
653 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, | |
654 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
9cb2173e EG |
655 | |
656 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
657 | .vidioc_g_register = vidioc_g_register, | |
658 | .vidioc_s_register = vidioc_s_register, | |
659 | #endif | |
660 | }; | |
661 | ||
662 | /********************************************************************/ | |
663 | ||
664 | /* | |
665 | * Videobuf2 operations | |
666 | */ | |
33119e80 | 667 | static int queue_setup(struct vb2_queue *vq, const void *parg, |
9cb2173e EG |
668 | unsigned int *nbuffers, unsigned int *nplanes, |
669 | unsigned int sizes[], void *alloc_ctxs[]) | |
670 | { | |
671 | struct stk1160 *dev = vb2_get_drv_priv(vq); | |
672 | unsigned long size; | |
673 | ||
674 | size = dev->width * dev->height * 2; | |
675 | ||
676 | /* | |
677 | * Here we can change the number of buffers being requested. | |
678 | * So, we set a minimum and a maximum like this: | |
679 | */ | |
680 | *nbuffers = clamp_t(unsigned int, *nbuffers, | |
681 | STK1160_MIN_VIDEO_BUFFERS, STK1160_MAX_VIDEO_BUFFERS); | |
682 | ||
683 | /* This means a packed colorformat */ | |
684 | *nplanes = 1; | |
685 | ||
686 | sizes[0] = size; | |
687 | ||
890024ad EG |
688 | stk1160_dbg("%s: buffer count %d, each %ld bytes\n", |
689 | __func__, *nbuffers, size); | |
9cb2173e EG |
690 | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static void buffer_queue(struct vb2_buffer *vb) | |
695 | { | |
696 | unsigned long flags; | |
697 | struct stk1160 *dev = vb2_get_drv_priv(vb->vb2_queue); | |
2d700715 | 698 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
9cb2173e | 699 | struct stk1160_buffer *buf = |
2d700715 | 700 | container_of(vbuf, struct stk1160_buffer, vb); |
9cb2173e EG |
701 | |
702 | spin_lock_irqsave(&dev->buf_lock, flags); | |
703 | if (!dev->udev) { | |
704 | /* | |
705 | * If the device is disconnected return the buffer to userspace | |
706 | * directly. The next QBUF call will fail with -ENODEV. | |
707 | */ | |
2d700715 | 708 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
9cb2173e EG |
709 | } else { |
710 | ||
711 | buf->mem = vb2_plane_vaddr(vb, 0); | |
712 | buf->length = vb2_plane_size(vb, 0); | |
713 | buf->bytesused = 0; | |
714 | buf->pos = 0; | |
715 | ||
716 | /* | |
717 | * If buffer length is less from expected then we return | |
718 | * the buffer to userspace directly. | |
719 | */ | |
720 | if (buf->length < dev->width * dev->height * 2) | |
2d700715 | 721 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
9cb2173e EG |
722 | else |
723 | list_add_tail(&buf->list, &dev->avail_bufs); | |
724 | ||
725 | } | |
726 | spin_unlock_irqrestore(&dev->buf_lock, flags); | |
727 | } | |
728 | ||
729 | static int start_streaming(struct vb2_queue *vq, unsigned int count) | |
730 | { | |
731 | struct stk1160 *dev = vb2_get_drv_priv(vq); | |
732 | return stk1160_start_streaming(dev); | |
733 | } | |
734 | ||
735 | /* abort streaming and wait for last buffer */ | |
e37559b2 | 736 | static void stop_streaming(struct vb2_queue *vq) |
9cb2173e EG |
737 | { |
738 | struct stk1160 *dev = vb2_get_drv_priv(vq); | |
e37559b2 | 739 | stk1160_stop_streaming(dev); |
9cb2173e EG |
740 | } |
741 | ||
742 | static struct vb2_ops stk1160_video_qops = { | |
743 | .queue_setup = queue_setup, | |
744 | .buf_queue = buffer_queue, | |
745 | .start_streaming = start_streaming, | |
746 | .stop_streaming = stop_streaming, | |
747 | .wait_prepare = vb2_ops_wait_prepare, | |
748 | .wait_finish = vb2_ops_wait_finish, | |
749 | }; | |
750 | ||
751 | static struct video_device v4l_template = { | |
752 | .name = "stk1160", | |
753 | .tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50, | |
754 | .fops = &stk1160_fops, | |
755 | .ioctl_ops = &stk1160_ioctl_ops, | |
756 | .release = video_device_release_empty, | |
757 | }; | |
758 | ||
759 | /********************************************************************/ | |
760 | ||
761 | /* Must be called with both v4l_lock and vb_queue_lock hold */ | |
762 | void stk1160_clear_queue(struct stk1160 *dev) | |
763 | { | |
764 | struct stk1160_buffer *buf; | |
765 | unsigned long flags; | |
766 | ||
767 | /* Release all active buffers */ | |
768 | spin_lock_irqsave(&dev->buf_lock, flags); | |
769 | while (!list_empty(&dev->avail_bufs)) { | |
770 | buf = list_first_entry(&dev->avail_bufs, | |
771 | struct stk1160_buffer, list); | |
772 | list_del(&buf->list); | |
2d700715 | 773 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
890024ad | 774 | stk1160_dbg("buffer [%p/%d] aborted\n", |
2d700715 | 775 | buf, buf->vb.vb2_buf.index); |
9cb2173e | 776 | } |
aeff0927 EG |
777 | |
778 | /* It's important to release the current buffer */ | |
779 | if (dev->isoc_ctl.buf) { | |
780 | buf = dev->isoc_ctl.buf; | |
781 | dev->isoc_ctl.buf = NULL; | |
782 | ||
2d700715 | 783 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
890024ad | 784 | stk1160_dbg("buffer [%p/%d] aborted\n", |
2d700715 | 785 | buf, buf->vb.vb2_buf.index); |
aeff0927 | 786 | } |
9cb2173e EG |
787 | spin_unlock_irqrestore(&dev->buf_lock, flags); |
788 | } | |
789 | ||
790 | int stk1160_vb2_setup(struct stk1160 *dev) | |
791 | { | |
792 | int rc; | |
793 | struct vb2_queue *q; | |
794 | ||
795 | q = &dev->vb_vidq; | |
9cb2173e | 796 | q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
ebbb5637 | 797 | q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; |
9cb2173e EG |
798 | q->drv_priv = dev; |
799 | q->buf_struct_size = sizeof(struct stk1160_buffer); | |
800 | q->ops = &stk1160_video_qops; | |
801 | q->mem_ops = &vb2_vmalloc_memops; | |
ade48681 | 802 | q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
9cb2173e EG |
803 | |
804 | rc = vb2_queue_init(q); | |
805 | if (rc < 0) | |
806 | return rc; | |
807 | ||
808 | /* initialize video dma queue */ | |
809 | INIT_LIST_HEAD(&dev->avail_bufs); | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
814 | int stk1160_video_register(struct stk1160 *dev) | |
815 | { | |
816 | int rc; | |
817 | ||
818 | /* Initialize video_device with a template structure */ | |
819 | dev->vdev = v4l_template; | |
9cb2173e EG |
820 | dev->vdev.queue = &dev->vb_vidq; |
821 | ||
822 | /* | |
823 | * Provide mutexes for v4l2 core and for videobuf2 queue. | |
824 | * It will be used to protect *only* v4l2 ioctls. | |
825 | */ | |
826 | dev->vdev.lock = &dev->v4l_lock; | |
827 | dev->vdev.queue->lock = &dev->vb_queue_lock; | |
828 | ||
829 | /* This will be used to set video_device parent */ | |
830 | dev->vdev.v4l2_dev = &dev->v4l2_dev; | |
9cb2173e EG |
831 | |
832 | /* NTSC is default */ | |
833 | dev->norm = V4L2_STD_NTSC_M; | |
834 | dev->width = 720; | |
835 | dev->height = 480; | |
836 | ||
837 | /* set default format */ | |
838 | dev->fmt = &format[0]; | |
839 | stk1160_set_std(dev); | |
840 | ||
8774bed9 | 841 | v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, |
9cb2173e EG |
842 | dev->norm); |
843 | ||
844 | video_set_drvdata(&dev->vdev, dev); | |
845 | rc = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1); | |
846 | if (rc < 0) { | |
847 | stk1160_err("video_register_device failed (%d)\n", rc); | |
848 | return rc; | |
849 | } | |
850 | ||
851 | v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n", | |
852 | video_device_node_name(&dev->vdev)); | |
853 | ||
854 | return 0; | |
855 | } |