1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
4 // video capture devices
5 //
6 // Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
7 // Markus Rechberger <mrechberger@gmail.com>
8 // Mauro Carvalho Chehab <mchehab@kernel.org>
9 // Sascha Sommer <saschasommer@freenet.de>
10 // Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
11 //
12 // Some parts based on SN9C10x PC Camera Controllers GPL driver made
13 // by Luca Risolia <luca.risolia@studio.unibo.it>
14
15 #include "em28xx.h"
16
17 #include <linux/init.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/bitmap.h>
22 #include <linux/usb.h>
23 #include <linux/i2c.h>
24 #include <linux/mm.h>
25 #include <linux/mutex.h>
26 #include <linux/slab.h>
27
28 #include "em28xx-v4l.h"
29 #include <media/v4l2-common.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-event.h>
32 #include <media/drv-intf/msp3400.h>
33 #include <media/tuner.h>
34
35 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
36 "Markus Rechberger <mrechberger@gmail.com>, " \
37 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \
38 "Sascha Sommer <saschasommer@freenet.de>"
39
40 static unsigned int isoc_debug;
41 module_param(isoc_debug, int, 0644);
42 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
43
44 static unsigned int disable_vbi;
45 module_param(disable_vbi, int, 0644);
46 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
47
48 static int alt;
49 module_param(alt, int, 0644);
50 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
51
52 #define em28xx_videodbg(fmt, arg...) do { \
53 if (video_debug) \
54 dev_printk(KERN_DEBUG, &dev->intf->dev, \
55 "video: %s: " fmt, __func__, ## arg); \
56 } while (0)
57
58 #define em28xx_isocdbg(fmt, arg...) do {\
59 if (isoc_debug) \
60 dev_printk(KERN_DEBUG, &dev->intf->dev, \
61 "isoc: %s: " fmt, __func__, ## arg); \
62 } while (0)
63
64 MODULE_AUTHOR(DRIVER_AUTHOR);
65 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
66 MODULE_LICENSE("GPL v2");
67 MODULE_VERSION(EM28XX_VERSION);
68
69 #define EM25XX_FRMDATAHDR_BYTE1 0x02
70 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
71 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
72 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
73 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
74 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
75 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
76
77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
78 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
80
81 module_param_array(video_nr, int, NULL, 0444);
82 module_param_array(vbi_nr, int, NULL, 0444);
83 module_param_array(radio_nr, int, NULL, 0444);
84 MODULE_PARM_DESC(video_nr, "video device numbers");
85 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
87
88 static unsigned int video_debug;
89 module_param(video_debug, int, 0644);
90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
91
92 /* supported video standards */
93 static struct em28xx_fmt format[] = {
94 {
95 .fourcc = V4L2_PIX_FMT_YUYV,
96 .depth = 16,
97 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
98 }, {
99 .fourcc = V4L2_PIX_FMT_RGB565,
100 .depth = 16,
101 .reg = EM28XX_OUTFMT_RGB_16_656,
102 }, {
103 .fourcc = V4L2_PIX_FMT_SRGGB8,
104 .depth = 8,
105 .reg = EM28XX_OUTFMT_RGB_8_RGRG,
106 }, {
107 .fourcc = V4L2_PIX_FMT_SBGGR8,
108 .depth = 8,
109 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
110 }, {
111 .fourcc = V4L2_PIX_FMT_SGRBG8,
112 .depth = 8,
113 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
114 }, {
115 .fourcc = V4L2_PIX_FMT_SGBRG8,
116 .depth = 8,
117 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
118 }, {
119 .fourcc = V4L2_PIX_FMT_YUV411P,
120 .depth = 12,
121 .reg = EM28XX_OUTFMT_YUV411,
122 },
123 };
124
125 /*FIXME: maxw should be dependent of alt mode */
norm_maxw(struct em28xx * dev)126 static inline unsigned int norm_maxw(struct em28xx *dev)
127 {
128 struct em28xx_v4l2 *v4l2 = dev->v4l2;
129
130 if (dev->is_webcam)
131 return v4l2->sensor_xres;
132
133 if (dev->board.max_range_640_480)
134 return 640;
135
136 return 720;
137 }
138
norm_maxh(struct em28xx * dev)139 static inline unsigned int norm_maxh(struct em28xx *dev)
140 {
141 struct em28xx_v4l2 *v4l2 = dev->v4l2;
142
143 if (dev->is_webcam)
144 return v4l2->sensor_yres;
145
146 if (dev->board.max_range_640_480)
147 return 480;
148
149 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
150 }
151
em28xx_vbi_supported(struct em28xx * dev)152 static int em28xx_vbi_supported(struct em28xx *dev)
153 {
154 /* Modprobe option to manually disable */
155 if (disable_vbi == 1)
156 return 0;
157
158 if (dev->is_webcam)
159 return 0;
160
161 /* FIXME: check subdevices for VBI support */
162
163 if (dev->chip_id == CHIP_ID_EM2860 ||
164 dev->chip_id == CHIP_ID_EM2883 ||
165 dev->board.decoder == EM28XX_BUILTIN)
166 return 1;
167
168 /* Version of em28xx that does not support VBI */
169 return 0;
170 }
171
em28xx_analogtv_supported(struct em28xx * dev)172 static int em28xx_analogtv_supported(struct em28xx *dev)
173 {
174 switch (dev->model) {
175 case EM2828X_BOARD_HAUPPAUGE_935_V2:
176 case EM2828X_BOARD_HAUPPAUGE_955_V2:
177 case EM2828X_BOARD_HAUPPAUGE_975_V2:
178 return 1;
179 default:
180 return 0;
181 };
182 }
183
184 /*
185 * em28xx_wake_i2c()
186 * configure i2c attached devices
187 */
em28xx_wake_i2c(struct em28xx * dev)188 static void em28xx_wake_i2c(struct em28xx *dev)
189 {
190 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
191
192 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0);
193 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
194 INPUT(dev->ctl_input)->vmux, 0, 0);
195 }
196
em28xx_colorlevels_set_default(struct em28xx * dev)197 static int em28xx_colorlevels_set_default(struct em28xx *dev)
198 {
199 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
200 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
201 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
202 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
203 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
204 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);
205
206 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
207 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
208 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
209 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
210 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
211 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
212 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
213 }
214
em28xx_set_outfmt(struct em28xx * dev)215 static int em28xx_set_outfmt(struct em28xx *dev)
216 {
217 int ret;
218 u8 fmt, vinctrl;
219 struct em28xx_v4l2 *v4l2 = dev->v4l2;
220
221 fmt = v4l2->format->reg;
222 if (!dev->is_em25xx)
223 fmt |= 0x20;
224 /*
225 * NOTE: it's not clear if this is really needed !
226 * The datasheets say bit 5 is a reserved bit and devices seem to work
227 * fine without it. But the Windows driver sets it for em2710/50+em28xx
228 * devices and we've always been setting it, too.
229 *
230 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
231 * it's likely used for an additional (compressed ?) format there.
232 */
233 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
234 if (ret < 0)
235 return ret;
236
237 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
238 if (ret < 0)
239 return ret;
240
241 vinctrl = v4l2->vinctl;
242 if (em28xx_vbi_supported(dev) == 1) {
243 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
244 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
245 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH,
246 v4l2->vbi_width / 4);
247 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height);
248 if (v4l2->norm & V4L2_STD_525_60) {
249 /* NTSC */
250 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
251 } else if (v4l2->norm & V4L2_STD_625_50) {
252 /* PAL */
253 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
254 }
255 }
256
257 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
258 }
259
em28xx_accumulator_set(struct em28xx * dev,u8 xmin,u8 xmax,u8 ymin,u8 ymax)260 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
261 u8 ymin, u8 ymax)
262 {
263 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
264 xmin, ymin, xmax, ymax);
265
266 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
267 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
268 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
269 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
270 }
271
em28xx_capture_area_set(struct em28xx * dev,u8 hstart,u8 vstart,u16 width,u16 height)272 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
273 u16 width, u16 height)
274 {
275 u8 cwidth = width >> 2;
276 u8 cheight = height >> 2;
277 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
278 /* NOTE: size limit: 2047x1023 = 2MPix */
279
280 em28xx_videodbg("capture area set to (%u,%u)/%ux%u\n",
281 hstart, vstart,
282 ((overflow & 2) << 9 | cwidth << 2),
283 ((overflow & 1) << 10 | cheight << 2));
284
285 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
286 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
287 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
288 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
289 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
290
291 /* FIXME: function/meaning of these registers ? */
292 /* FIXME: align width+height to multiples of 4 ?! */
293 if (dev->is_em25xx) {
294 em28xx_write_reg(dev, 0x34, width >> 4);
295 em28xx_write_reg(dev, 0x35, height >> 4);
296 }
297 }
298
em28xx_scaler_set(struct em28xx * dev,u16 h,u16 v)299 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
300 {
301 u8 mode = 0x00;
302 /* the em2800 scaler only supports scaling down to 50% */
303
304 if (dev->board.is_em2800) {
305 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
306 } else {
307 u8 buf[2];
308
309 buf[0] = h;
310 buf[1] = h >> 8;
311 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
312
313 buf[0] = v;
314 buf[1] = v >> 8;
315 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
316 /*
317 * it seems that both H and V scalers must be active
318 * to work correctly
319 */
320 mode = (h || v) ? 0x30 : 0x00;
321 }
322 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
323 }
324
325 /* FIXME: this only function read values from dev */
em28xx_resolution_set(struct em28xx * dev)326 static int em28xx_resolution_set(struct em28xx *dev)
327 {
328 struct em28xx_v4l2 *v4l2 = dev->v4l2;
329 int width = norm_maxw(dev);
330 int height = norm_maxh(dev);
331
332 /* Properly setup VBI */
333 v4l2->vbi_width = 720;
334 if (v4l2->norm & V4L2_STD_525_60)
335 v4l2->vbi_height = 12;
336 else
337 v4l2->vbi_height = 18;
338
339 em28xx_set_outfmt(dev);
340
341 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
342
343 /*
344 * If we don't set the start position to 2 in VBI mode, we end up
345 * with line 20/21 being YUYV encoded instead of being in 8-bit
346 * greyscale. The core of the issue is that line 21 (and line 23 for
347 * PAL WSS) are inside of active video region, and as a result they
348 * get the pixelformatting associated with that area. So by cropping
349 * it out, we end up with the same format as the rest of the VBI
350 * region
351 */
352 if (em28xx_vbi_supported(dev) == 1)
353 em28xx_capture_area_set(dev, 0, 2, width, height);
354 else
355 em28xx_capture_area_set(dev, 0, 0, width, height);
356
357 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
358 }
359
em2828X_decoder_set_std(struct em28xx * dev,v4l2_std_id norm)360 static void em2828X_decoder_set_std(struct em28xx *dev, v4l2_std_id norm)
361 {
362 if (norm & V4L2_STD_525_60) {
363 dev_dbg(&dev->intf->dev, "V4L2_STD_525_60");
364 em28xx_write_reg(dev, 0x7A01, 0x0d); // 0x05
365 em28xx_write_reg(dev, 0x7A04, 0xDD);
366 em28xx_write_reg(dev, 0x7A07, 0x60);
367 em28xx_write_reg(dev, 0x7A08, 0x7A);
368 em28xx_write_reg(dev, 0x7A09, 0x02);
369 em28xx_write_reg(dev, 0x7A0A, 0x7C);
370 em28xx_write_reg(dev, 0x7A0C, 0x8A);
371 em28xx_write_reg(dev, 0x7A0F, 0x1C);
372 em28xx_write_reg(dev, 0x7A18, 0x20);
373 em28xx_write_reg(dev, 0x7A19, 0x74);
374 em28xx_write_reg(dev, 0x7A1A, 0x5D);
375 em28xx_write_reg(dev, 0x7A1B, 0x17);
376 em28xx_write_reg(dev, 0x7A2E, 0x85);
377 em28xx_write_reg(dev, 0x7A31, 0x63);
378 em28xx_write_reg(dev, 0x7A82, 0x42);
379 em28xx_write_reg(dev, 0x7AC0, 0xD4);
380
381 if (INPUT(dev->ctl_input)->vmux == EM2828X_COMPOSITE) {
382 em28xx_write_reg(dev, 0x7A00, 0x00);
383 em28xx_write_reg(dev, 0x7A03, 0x00);
384 em28xx_write_reg(dev, 0x7A30, 0x22);
385 em28xx_write_reg(dev, 0x7A80, 0x03);
386 } else if (INPUT(dev->ctl_input)->vmux == EM2828X_TELEVISION) {
387 em28xx_write_reg(dev, 0x7A17, 0xc3);
388 em28xx_write_reg(dev, 0x7A31, 0x62); // BRL 0x63
389 em28xx_write_reg(dev, 0x7A82, 0x42);
390 em28xx_write_reg(dev, 0x7AC0, 0xD4);
391 em28xx_write_reg(dev, 0x7A00, 0x00);
392 em28xx_write_reg(dev, 0x7A03, 0x00);
393 em28xx_write_reg(dev, 0x7A30, 0x20);
394 em28xx_write_reg(dev, 0x7A80, 0x00);
395
396 em28xx_write_reg(dev, 0x7A50, 0xdd);
397 em28xx_write_reg(dev, 0x7A5d, 0x0e);
398 em28xx_write_reg(dev, 0x7A5e, 0xea);
399 em28xx_write_reg(dev, 0x7A60, 0x64);
400 em28xx_write_reg(dev, 0x7A67, 0x5a);
401 } else {
402 em28xx_write_reg(dev, 0x7A00, 0x01);
403 em28xx_write_reg(dev, 0x7A03, 0x03);
404 em28xx_write_reg(dev, 0x7A30, 0x20);
405 em28xx_write_reg(dev, 0x7A80, 0x04);
406 }
407 } else if (norm & V4L2_STD_625_50) {
408 dev_dbg(&dev->intf->dev, "V4L2_STD_625_50");
409 em28xx_write_reg(dev, 0x7A04, 0xDC);
410 em28xx_write_reg(dev, 0x7A0C, 0x67);
411 em28xx_write_reg(dev, 0x7A0F, 0x1C);
412 em28xx_write_reg(dev, 0x7A18, 0x28);
413 em28xx_write_reg(dev, 0x7A19, 0x32);
414 em28xx_write_reg(dev, 0x7A1A, 0xB9);
415 em28xx_write_reg(dev, 0x7A1B, 0x86);
416 em28xx_write_reg(dev, 0x7A31, 0xC3);
417 em28xx_write_reg(dev, 0x7A82, 0x52);
418
419 if (INPUT(dev->ctl_input)->vmux == EM2828X_COMPOSITE) {
420 em28xx_write_reg(dev, 0x7A00, 0x32);
421 em28xx_write_reg(dev, 0x7A01, 0x10);
422 em28xx_write_reg(dev, 0x7A03, 0x06);
423 em28xx_write_reg(dev, 0x7A07, 0x2f);
424 em28xx_write_reg(dev, 0x7A08, 0x77);
425 em28xx_write_reg(dev, 0x7A09, 0x0f);
426 em28xx_write_reg(dev, 0x7A0A, 0x8c);
427 em28xx_write_reg(dev, 0x7A20, 0x3d);
428 em28xx_write_reg(dev, 0x7A2E, 0x88);
429 em28xx_write_reg(dev, 0x7A30, 0x2c);
430 em28xx_write_reg(dev, 0x7A80, 0x07);
431 } else if (INPUT(dev->ctl_input)->vmux == EM2828X_TELEVISION) {
432 em28xx_write_reg(dev, 0x7A00, 0x32);
433 em28xx_write_reg(dev, 0x7A03, 0x09);
434 em28xx_write_reg(dev, 0x7A30, 0x2a);
435 em28xx_write_reg(dev, 0x7A80, 0x03);
436 em28xx_write_reg(dev, 0x7A20, 0x35);
437 em28xx_write_reg(dev, 0x7A2e, 0x88);
438 em28xx_write_reg(dev, 0x7A53, 0xcc);
439 em28xx_write_reg(dev, 0x7A5d, 0x16);
440 em28xx_write_reg(dev, 0x7A5e, 0x50);
441 em28xx_write_reg(dev, 0x7A60, 0xb4);
442 em28xx_write_reg(dev, 0x7A67, 0x64);
443 } else {
444 em28xx_write_reg(dev, 0x7A00, 0x33);
445 em28xx_write_reg(dev, 0x7A01, 0x04);
446 em28xx_write_reg(dev, 0x7A03, 0x04);
447 em28xx_write_reg(dev, 0x7A07, 0x20);
448 em28xx_write_reg(dev, 0x7A08, 0x6a);
449 em28xx_write_reg(dev, 0x7A09, 0x16);
450 em28xx_write_reg(dev, 0x7A0A, 0x80);
451 em28xx_write_reg(dev, 0x7A2E, 0x8a);
452 em28xx_write_reg(dev, 0x7A30, 0x26);
453 em28xx_write_reg(dev, 0x7A80, 0x08);
454 }
455 } else {
456 dev_err(&dev->intf->dev, "%s() Unsupported STD: %X", __func__, (unsigned int)norm);
457 }
458
459 em28xx_write_reg(dev, 0x7A3F, 0x01);
460 em28xx_write_reg(dev, 0x7A3F, 0x00);
461 }
462
463 /* Set USB alternate setting for analog video */
em28xx_set_alternate(struct em28xx * dev)464 static int em28xx_set_alternate(struct em28xx *dev)
465 {
466 struct em28xx_v4l2 *v4l2 = dev->v4l2;
467 struct usb_device *udev = interface_to_usbdev(dev->intf);
468 int err;
469 int i;
470 unsigned int min_pkt_size = v4l2->width * 2 + 4;
471
472 /*
473 * NOTE: for isoc transfers, only alt settings > 0 are allowed
474 * bulk transfers seem to work only with alt=0 !
475 */
476 dev->alt = 0;
477 if (alt > 0 && alt < dev->num_alt) {
478 em28xx_videodbg("alternate forced to %d\n", dev->alt);
479 dev->alt = alt;
480 goto set_alt;
481 }
482 if (dev->analog_xfer_bulk)
483 goto set_alt;
484
485 /*
486 * When image size is bigger than a certain value,
487 * the frame size should be increased, otherwise, only
488 * green screen will be received.
489 */
490 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
491 min_pkt_size *= 2;
492
493 for (i = 0; i < dev->num_alt; i++) {
494 /* stop when the selected alt setting offers enough bandwidth */
495 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
496 dev->alt = i;
497 break;
498 /*
499 * otherwise make sure that we end up with the maximum
500 * bandwidth because the min_pkt_size equation might be wrong.
501 *
502 */
503 } else if (dev->alt_max_pkt_size_isoc[i] >
504 dev->alt_max_pkt_size_isoc[dev->alt])
505 dev->alt = i;
506 }
507
508 set_alt:
509 /*
510 * NOTE: for bulk transfers, we need to call usb_set_interface()
511 * even if the previous settings were the same. Otherwise streaming
512 * fails with all urbs having status = -EOVERFLOW !
513 */
514 if (dev->analog_xfer_bulk) {
515 dev->max_pkt_size = 512; /* USB 2.0 spec */
516 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
517 } else { /* isoc */
518 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
519 min_pkt_size, dev->alt);
520 dev->max_pkt_size =
521 dev->alt_max_pkt_size_isoc[dev->alt];
522 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
523 }
524 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
525 dev->alt, dev->max_pkt_size);
526 err = usb_set_interface(udev, dev->ifnum, dev->alt);
527 if (err < 0) {
528 dev_err(&dev->intf->dev,
529 "cannot change alternate number to %d (error=%i)\n",
530 dev->alt, err);
531 return err;
532 }
533 return 0;
534 }
535
536 /*
537 * DMA and thread functions
538 */
539
540 /*
541 * Finish the current buffer
542 */
finish_buffer(struct em28xx * dev,struct em28xx_buffer * buf)543 static inline void finish_buffer(struct em28xx *dev,
544 struct em28xx_buffer *buf)
545 {
546 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
547
548 buf->vb.sequence = dev->v4l2->field_count++;
549 if (dev->v4l2->progressive)
550 buf->vb.field = V4L2_FIELD_NONE;
551 else
552 buf->vb.field = V4L2_FIELD_INTERLACED;
553 buf->vb.vb2_buf.timestamp = ktime_get_ns();
554
555 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
556 }
557
558 /*
559 * Copy picture data from USB buffer to video buffer
560 */
em28xx_copy_video(struct em28xx * dev,struct em28xx_buffer * buf,unsigned char * usb_buf,unsigned long len)561 static void em28xx_copy_video(struct em28xx *dev,
562 struct em28xx_buffer *buf,
563 unsigned char *usb_buf,
564 unsigned long len)
565 {
566 struct em28xx_v4l2 *v4l2 = dev->v4l2;
567 void *fieldstart, *startwrite, *startread;
568 int linesdone, currlinedone, offset, lencopy, remain;
569 int bytesperline = v4l2->width << 1;
570
571 if (buf->pos + len > buf->length)
572 len = buf->length - buf->pos;
573
574 startread = usb_buf;
575 remain = len;
576
577 if (v4l2->progressive || buf->top_field)
578 fieldstart = buf->vb_buf;
579 else /* interlaced mode, even nr. of lines */
580 fieldstart = buf->vb_buf + bytesperline;
581
582 linesdone = buf->pos / bytesperline;
583 currlinedone = buf->pos % bytesperline;
584
585 if (v4l2->progressive)
586 offset = linesdone * bytesperline + currlinedone;
587 else
588 offset = linesdone * bytesperline * 2 + currlinedone;
589
590 startwrite = fieldstart + offset;
591 lencopy = bytesperline - currlinedone;
592 lencopy = lencopy > remain ? remain : lencopy;
593
594 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
595 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
596 ((char *)startwrite + lencopy) -
597 ((char *)buf->vb_buf + buf->length));
598 remain = (char *)buf->vb_buf + buf->length -
599 (char *)startwrite;
600 lencopy = remain;
601 }
602 if (lencopy <= 0)
603 return;
604 memcpy(startwrite, startread, lencopy);
605
606 remain -= lencopy;
607
608 while (remain > 0) {
609 if (v4l2->progressive)
610 startwrite += lencopy;
611 else
612 startwrite += lencopy + bytesperline;
613 startread += lencopy;
614 if (bytesperline > remain)
615 lencopy = remain;
616 else
617 lencopy = bytesperline;
618
619 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
620 buf->length) {
621 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n",
622 ((char *)startwrite + lencopy) -
623 ((char *)buf->vb_buf + buf->length));
624 remain = (char *)buf->vb_buf + buf->length -
625 (char *)startwrite;
626 lencopy = remain;
627 }
628 if (lencopy <= 0)
629 break;
630
631 memcpy(startwrite, startread, lencopy);
632
633 remain -= lencopy;
634 }
635
636 buf->pos += len;
637 }
638
639 /*
640 * Copy VBI data from USB buffer to video buffer
641 */
em28xx_copy_vbi(struct em28xx * dev,struct em28xx_buffer * buf,unsigned char * usb_buf,unsigned long len)642 static void em28xx_copy_vbi(struct em28xx *dev,
643 struct em28xx_buffer *buf,
644 unsigned char *usb_buf,
645 unsigned long len)
646 {
647 unsigned int offset;
648
649 if (buf->pos + len > buf->length)
650 len = buf->length - buf->pos;
651
652 offset = buf->pos;
653 /* Make sure the bottom field populates the second half of the frame */
654 if (buf->top_field == 0)
655 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;
656
657 memcpy(buf->vb_buf + offset, usb_buf, len);
658 buf->pos += len;
659 }
660
print_err_status(struct em28xx * dev,int packet,int status)661 static inline void print_err_status(struct em28xx *dev,
662 int packet, int status)
663 {
664 char *errmsg = "Unknown";
665
666 switch (status) {
667 case -ENOENT:
668 errmsg = "unlinked synchronously";
669 break;
670 case -ECONNRESET:
671 errmsg = "unlinked asynchronously";
672 break;
673 case -ENOSR:
674 errmsg = "Buffer error (overrun)";
675 break;
676 case -EPIPE:
677 errmsg = "Stalled (device not responding)";
678 break;
679 case -EOVERFLOW:
680 errmsg = "Babble (bad cable?)";
681 break;
682 case -EPROTO:
683 errmsg = "Bit-stuff error (bad cable?)";
684 break;
685 case -EILSEQ:
686 errmsg = "CRC/Timeout (could be anything)";
687 break;
688 case -ETIME:
689 errmsg = "Device does not respond";
690 break;
691 }
692 if (packet < 0) {
693 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
694 } else {
695 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
696 packet, status, errmsg);
697 }
698 }
699
700 /*
701 * get the next available buffer from dma queue
702 */
get_next_buf(struct em28xx * dev,struct em28xx_dmaqueue * dma_q)703 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
704 struct em28xx_dmaqueue *dma_q)
705 {
706 struct em28xx_buffer *buf;
707
708 if (list_empty(&dma_q->active)) {
709 em28xx_isocdbg("No active queue to serve\n");
710 return NULL;
711 }
712
713 /* Get the next buffer */
714 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
715 /* Cleans up buffer - Useful for testing for frame/URB loss */
716 list_del(&buf->list);
717 buf->pos = 0;
718 buf->vb_buf = buf->mem;
719
720 return buf;
721 }
722
723 /*
724 * Finish the current buffer if completed and prepare for the next field
725 */
726 static struct em28xx_buffer *
finish_field_prepare_next(struct em28xx * dev,struct em28xx_buffer * buf,struct em28xx_dmaqueue * dma_q)727 finish_field_prepare_next(struct em28xx *dev,
728 struct em28xx_buffer *buf,
729 struct em28xx_dmaqueue *dma_q)
730 {
731 struct em28xx_v4l2 *v4l2 = dev->v4l2;
732
733 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
734 if (buf)
735 finish_buffer(dev, buf);
736 buf = get_next_buf(dev, dma_q);
737 }
738 if (buf) {
739 buf->top_field = v4l2->top_field;
740 buf->pos = 0;
741 }
742
743 return buf;
744 }
745
746 /*
747 * Process data packet according to the em2710/em2750/em28xx frame data format
748 */
process_frame_data_em28xx(struct em28xx * dev,unsigned char * data_pkt,unsigned int data_len)749 static inline void process_frame_data_em28xx(struct em28xx *dev,
750 unsigned char *data_pkt,
751 unsigned int data_len)
752 {
753 struct em28xx_v4l2 *v4l2 = dev->v4l2;
754 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
755 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
756 struct em28xx_dmaqueue *dma_q = &dev->vidq;
757 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
758
759 /*
760 * capture type 0 = vbi start
761 * capture type 1 = vbi in progress
762 * capture type 2 = video start
763 * capture type 3 = video in progress
764 */
765 if (data_len >= 4) {
766 /*
767 * NOTE: Headers are always 4 bytes and
768 * never split across packets
769 */
770 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
771 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
772 /* Continuation */
773 data_pkt += 4;
774 data_len -= 4;
775 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
776 /* Field start (VBI mode) */
777 v4l2->capture_type = 0;
778 v4l2->vbi_read = 0;
779 em28xx_isocdbg("VBI START HEADER !!!\n");
780 v4l2->top_field = !(data_pkt[2] & 1);
781 data_pkt += 4;
782 data_len -= 4;
783 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
784 /* Field start (VBI disabled) */
785 v4l2->capture_type = 2;
786 em28xx_isocdbg("VIDEO START HEADER !!!\n");
787 v4l2->top_field = !(data_pkt[2] & 1);
788 data_pkt += 4;
789 data_len -= 4;
790 }
791 }
792 /*
793 * NOTE: With bulk transfers, intermediate data packets
794 * have no continuation header
795 */
796
797 if (v4l2->capture_type == 0) {
798 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
799 dev->usb_ctl.vbi_buf = vbi_buf;
800 v4l2->capture_type = 1;
801 }
802
803 if (v4l2->capture_type == 1) {
804 int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
805 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
806 (vbi_size - v4l2->vbi_read) : data_len;
807
808 /* Copy VBI data */
809 if (vbi_buf)
810 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
811 v4l2->vbi_read += vbi_data_len;
812
813 if (vbi_data_len < data_len) {
814 /* Continue with copying video data */
815 v4l2->capture_type = 2;
816 data_pkt += vbi_data_len;
817 data_len -= vbi_data_len;
818 }
819 }
820
821 if (v4l2->capture_type == 2) {
822 buf = finish_field_prepare_next(dev, buf, dma_q);
823 dev->usb_ctl.vid_buf = buf;
824 v4l2->capture_type = 3;
825 }
826
827 if (v4l2->capture_type == 3 && buf && data_len > 0)
828 em28xx_copy_video(dev, buf, data_pkt, data_len);
829 }
830
831 /*
832 * Process data packet according to the em25xx/em276x/7x/8x frame data format
833 */
process_frame_data_em25xx(struct em28xx * dev,unsigned char * data_pkt,unsigned int data_len)834 static inline void process_frame_data_em25xx(struct em28xx *dev,
835 unsigned char *data_pkt,
836 unsigned int data_len)
837 {
838 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
839 struct em28xx_dmaqueue *dmaq = &dev->vidq;
840 struct em28xx_v4l2 *v4l2 = dev->v4l2;
841 bool frame_end = false;
842
843 /* Check for header */
844 /*
845 * NOTE: at least with bulk transfers, only the first packet
846 * has a header and has always set the FRAME_END bit
847 */
848 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
849 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
850 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
851 v4l2->top_field = !(data_pkt[1] &
852 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
853 frame_end = data_pkt[1] &
854 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
855 data_pkt += 2;
856 data_len -= 2;
857 }
858
859 /* Finish field and prepare next (BULK only) */
860 if (dev->analog_xfer_bulk && frame_end) {
861 buf = finish_field_prepare_next(dev, buf, dmaq);
862 dev->usb_ctl.vid_buf = buf;
863 }
864 /*
865 * NOTE: in ISOC mode when a new frame starts and buf==NULL,
866 * we COULD already prepare a buffer here to avoid skipping the
867 * first frame.
868 */
869 }
870
871 /* Copy data */
872 if (buf && data_len > 0)
873 em28xx_copy_video(dev, buf, data_pkt, data_len);
874
875 /* Finish frame (ISOC only) => avoids lag of 1 frame */
876 if (!dev->analog_xfer_bulk && frame_end) {
877 buf = finish_field_prepare_next(dev, buf, dmaq);
878 dev->usb_ctl.vid_buf = buf;
879 }
880
881 /*
882 * NOTES:
883 *
884 * 1) Tested with USB bulk transfers only !
885 * The wording in the datasheet suggests that isoc might work different.
886 * The current code assumes that with isoc transfers each packet has a
887 * header like with the other em28xx devices.
888 *
889 * 2) Support for interlaced mode is pure theory. It has not been
890 * tested and it is unknown if these devices actually support it.
891 */
892 }
893
894 /* Processes and copies the URB data content (video and VBI data) */
em28xx_urb_data_copy(struct em28xx * dev,struct urb * urb)895 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
896 {
897 int xfer_bulk, num_packets, i;
898 unsigned char *usb_data_pkt;
899 unsigned int usb_data_len;
900
901 if (!dev)
902 return 0;
903
904 if (dev->disconnected)
905 return 0;
906
907 if (urb->status < 0)
908 print_err_status(dev, -1, urb->status);
909
910 xfer_bulk = usb_pipebulk(urb->pipe);
911
912 if (xfer_bulk) /* bulk */
913 num_packets = 1;
914 else /* isoc */
915 num_packets = urb->number_of_packets;
916
917 for (i = 0; i < num_packets; i++) {
918 if (xfer_bulk) { /* bulk */
919 usb_data_len = urb->actual_length;
920
921 usb_data_pkt = urb->transfer_buffer;
922 } else { /* isoc */
923 if (urb->iso_frame_desc[i].status < 0) {
924 print_err_status(dev, i,
925 urb->iso_frame_desc[i].status);
926 if (urb->iso_frame_desc[i].status != -EPROTO)
927 continue;
928 }
929
930 usb_data_len = urb->iso_frame_desc[i].actual_length;
931 if (usb_data_len > dev->max_pkt_size) {
932 em28xx_isocdbg("packet bigger than packet size");
933 continue;
934 }
935
936 usb_data_pkt = urb->transfer_buffer +
937 urb->iso_frame_desc[i].offset;
938 }
939
940 if (usb_data_len == 0) {
941 /* NOTE: happens very often with isoc transfers */
942 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
943 continue;
944 }
945
946 if (dev->is_em25xx)
947 process_frame_data_em25xx(dev,
948 usb_data_pkt, usb_data_len);
949 else
950 process_frame_data_em28xx(dev,
951 usb_data_pkt, usb_data_len);
952 }
953 return 1;
954 }
955
get_resource(enum v4l2_buf_type f_type)956 static int get_resource(enum v4l2_buf_type f_type)
957 {
958 switch (f_type) {
959 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
960 return EM28XX_RESOURCE_VIDEO;
961 case V4L2_BUF_TYPE_VBI_CAPTURE:
962 return EM28XX_RESOURCE_VBI;
963 default:
964 WARN_ON(1);
965 return -1; /* Indicate that device is busy */
966 }
967 }
968
969 /* Usage lock check functions */
res_get(struct em28xx * dev,enum v4l2_buf_type f_type)970 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
971 {
972 int res_type = get_resource(f_type);
973
974 /* is it free? */
975 if (dev->resources & res_type) {
976 /* no, someone else uses it */
977 return -EBUSY;
978 }
979
980 /* it's free, grab it */
981 dev->resources |= res_type;
982 em28xx_videodbg("res: get %d\n", res_type);
983 return 0;
984 }
985
res_free(struct em28xx * dev,enum v4l2_buf_type f_type)986 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
987 {
988 int res_type = get_resource(f_type);
989
990 dev->resources &= ~res_type;
991 em28xx_videodbg("res: put %d\n", res_type);
992 }
993
em28xx_v4l2_media_release(struct em28xx * dev)994 static void em28xx_v4l2_media_release(struct em28xx *dev)
995 {
996 #ifdef CONFIG_MEDIA_CONTROLLER
997 int i;
998
999 if (dev->board.decoder == EM28XX_BUILTIN) {
1000 media_device_unregister_entity(dev->v4l2->decoder);
1001 kfree(dev->v4l2->decoder);
1002 dev->v4l2->decoder = NULL;
1003 }
1004
1005 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
1006 if (!INPUT(i)->type)
1007 return;
1008 media_device_unregister_entity(&dev->input_ent[i]);
1009 }
1010 #endif
1011 }
1012
1013 /*
1014 * Media Controller helper functions
1015 */
1016
em28xx_enable_analog_tuner(struct em28xx * dev)1017 static int em28xx_enable_analog_tuner(struct em28xx *dev)
1018 {
1019 #ifdef CONFIG_MEDIA_CONTROLLER
1020 struct media_device *mdev = dev->media_dev;
1021 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1022 struct media_entity *source;
1023 struct media_link *link, *found_link = NULL;
1024 int ret, active_links = 0;
1025
1026 if (!mdev || !v4l2->decoder)
1027 return 0;
1028
1029 /*
1030 * This will find the tuner that is connected into the decoder.
1031 * Technically, this is not 100% correct, as the device may be
1032 * using an analog input instead of the tuner. However, as we can't
1033 * do DVB streaming while the DMA engine is being used for V4L2,
1034 * this should be enough for the actual needs.
1035 */
1036 list_for_each_entry(link, &v4l2->decoder->links, list) {
1037 if (link->sink->entity == v4l2->decoder) {
1038 found_link = link;
1039 if (link->flags & MEDIA_LNK_FL_ENABLED)
1040 active_links++;
1041 break;
1042 }
1043 }
1044
1045 if (active_links == 1 || !found_link)
1046 return 0;
1047
1048 source = found_link->source->entity;
1049 list_for_each_entry(link, &source->links, list) {
1050 struct media_entity *sink;
1051 int flags = 0;
1052
1053 sink = link->sink->entity;
1054
1055 if (sink == v4l2->decoder)
1056 flags = MEDIA_LNK_FL_ENABLED;
1057
1058 ret = media_entity_setup_link(link, flags);
1059 if (ret) {
1060 dev_err(&dev->intf->dev,
1061 "Couldn't change link %s->%s to %s. Error %d\n",
1062 source->name, sink->name,
1063 flags ? "enabled" : "disabled",
1064 ret);
1065 return ret;
1066 }
1067
1068 em28xx_videodbg("link %s->%s was %s\n",
1069 source->name, sink->name,
1070 flags ? "ENABLED" : "disabled");
1071 }
1072 #endif
1073 return 0;
1074 }
1075
1076 static const char * const iname[] = {
1077 [EM28XX_VMUX_COMPOSITE] = "Composite",
1078 [EM28XX_VMUX_SVIDEO] = "S-Video",
1079 [EM28XX_VMUX_TELEVISION] = "Television",
1080 [EM28XX_RADIO] = "Radio",
1081 };
1082
em28xx_v4l2_create_entities(struct em28xx * dev)1083 static void em28xx_v4l2_create_entities(struct em28xx *dev)
1084 {
1085 #if defined(CONFIG_MEDIA_CONTROLLER)
1086 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1087 int ret, i;
1088
1089 /* Initialize Video, VBI and Radio pads */
1090 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK;
1091 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad);
1092 if (ret < 0)
1093 dev_err(&dev->intf->dev,
1094 "failed to initialize video media entity!\n");
1095
1096 if (em28xx_vbi_supported(dev)) {
1097 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK;
1098 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1,
1099 &v4l2->vbi_pad);
1100 if (ret < 0)
1101 dev_err(&dev->intf->dev,
1102 "failed to initialize vbi media entity!\n");
1103 }
1104
1105 /* Webcams don't have input connectors */
1106 if (dev->is_webcam)
1107 return;
1108
1109 /* Create entities for each input connector */
1110 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
1111 struct media_entity *ent = &dev->input_ent[i];
1112
1113 if (!INPUT(i)->type)
1114 break;
1115
1116 ent->name = iname[INPUT(i)->type];
1117 ent->flags = MEDIA_ENT_FL_CONNECTOR;
1118 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1119
1120 switch (INPUT(i)->type) {
1121 case EM28XX_VMUX_COMPOSITE:
1122 ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1123 break;
1124 case EM28XX_VMUX_SVIDEO:
1125 ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1126 break;
1127 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
1128 if (dev->tuner_type != TUNER_ABSENT || em28xx_analogtv_supported(dev))
1129 ent->function = MEDIA_ENT_F_CONN_RF;
1130 break;
1131 }
1132
1133 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1134 if (ret < 0)
1135 dev_err(&dev->intf->dev,
1136 "failed to initialize input pad[%d]!\n", i);
1137
1138 ret = media_device_register_entity(dev->media_dev, ent);
1139 if (ret < 0)
1140 dev_err(&dev->intf->dev,
1141 "failed to register input entity %d!\n", i);
1142 }
1143
1144 if (dev->board.decoder == EM28XX_BUILTIN) {
1145 v4l2->decoder_pads[EM2828X_PAD_INPUT].flags = MEDIA_PAD_FL_SINK;
1146 v4l2->decoder_pads[EM2828X_PAD_INPUT].sig_type = PAD_SIGNAL_ANALOG;
1147 v4l2->decoder_pads[EM2828X_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
1148 v4l2->decoder_pads[EM2828X_PAD_VID_OUT].sig_type = PAD_SIGNAL_DV;
1149
1150 v4l2->decoder = kzalloc_obj(*v4l2->decoder);
1151 v4l2->decoder->name = "em2828x_builtin";
1152 v4l2->decoder->function = MEDIA_ENT_F_ATV_DECODER;
1153
1154 ret = media_entity_pads_init(v4l2->decoder, EM2828X_NUM_PADS,
1155 &v4l2->decoder_pads[0]);
1156 if (ret < 0)
1157 dev_err(&dev->intf->dev, "failed to initialize decoder pads %d!\n", ret);
1158
1159 ret = media_device_register_entity(dev->media_dev, v4l2->decoder);
1160 if (ret < 0)
1161 dev_err(&dev->intf->dev, "failed to register decoder entity %d!\n", ret);
1162 }
1163
1164 #endif
1165 }
1166
1167 /*
1168 * Videobuf2 operations
1169 */
1170
queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])1171 static int queue_setup(struct vb2_queue *vq,
1172 unsigned int *nbuffers, unsigned int *nplanes,
1173 unsigned int sizes[], struct device *alloc_devs[])
1174 {
1175 struct em28xx *dev = vb2_get_drv_priv(vq);
1176 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1177 unsigned long size =
1178 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1179
1180 if (*nplanes)
1181 return sizes[0] < size ? -EINVAL : 0;
1182 *nplanes = 1;
1183 sizes[0] = size;
1184
1185 em28xx_enable_analog_tuner(dev);
1186
1187 return 0;
1188 }
1189
1190 static int
buffer_prepare(struct vb2_buffer * vb)1191 buffer_prepare(struct vb2_buffer *vb)
1192 {
1193 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1194 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1195 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1196 unsigned long size;
1197
1198 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
1199
1200 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1201
1202 if (vb2_plane_size(vb, 0) < size) {
1203 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
1204 __func__, vb2_plane_size(vb, 0), size);
1205 return -EINVAL;
1206 }
1207 vb2_set_plane_payload(vb, 0, size);
1208
1209 return 0;
1210 }
1211
em28xx_start_analog_streaming(struct vb2_queue * vq,unsigned int count)1212 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
1213 {
1214 struct em28xx *dev = vb2_get_drv_priv(vq);
1215 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1216 struct em28xx_dmaqueue *dmaq = vq->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
1217 &dev->vbiq : &dev->vidq;
1218 unsigned long flags = 0;
1219 struct v4l2_frequency f;
1220 struct v4l2_fh *owner;
1221 int rc = 0;
1222
1223 em28xx_videodbg("%s\n", __func__);
1224
1225 dev->v4l2->field_count = 0;
1226
1227 /*
1228 * Make sure streaming is not already in progress for this type
1229 * of filehandle (e.g. video, vbi)
1230 */
1231 rc = res_get(dev, vq->type);
1232 if (rc)
1233 goto exit;
1234
1235 if (v4l2->streaming_users == 0) {
1236 /* First active streaming user, so allocate all the URBs */
1237
1238 /* Allocate the USB bandwidth */
1239 em28xx_set_alternate(dev);
1240
1241 /*
1242 * Needed, since GPIO might have disabled power of
1243 * some i2c device
1244 */
1245 em28xx_wake_i2c(dev);
1246
1247 v4l2->capture_type = -1;
1248 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
1249 dev->analog_xfer_bulk,
1250 EM28XX_NUM_BUFS,
1251 dev->max_pkt_size,
1252 dev->packet_multiplier,
1253 em28xx_urb_data_copy);
1254 if (rc < 0) {
1255 res_free(dev, vq->type);
1256 goto exit;
1257 }
1258
1259 /*
1260 * djh: it's not clear whether this code is still needed. I'm
1261 * leaving it in here for now entirely out of concern for
1262 * backward compatibility (the old code did it)
1263 */
1264
1265 /* Ask tuner to go to analog or radio mode */
1266 memset(&f, 0, sizeof(f));
1267 f.frequency = v4l2->frequency;
1268 owner = (struct v4l2_fh *)vq->owner;
1269 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
1270 f.type = V4L2_TUNER_RADIO;
1271 else
1272 f.type = V4L2_TUNER_ANALOG_TV;
1273 v4l2_device_call_all(&v4l2->v4l2_dev,
1274 0, tuner, s_frequency, &f);
1275
1276 /* Enable video stream at TV decoder */
1277 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
1278 }
1279
1280 v4l2->streaming_users++;
1281 return 0;
1282
1283 exit:
1284 spin_lock_irqsave(&dev->slock, flags);
1285 while (!list_empty(&dmaq->active)) {
1286 struct em28xx_buffer *buf;
1287
1288 buf = list_entry(dmaq->active.next, struct em28xx_buffer, list);
1289 list_del(&buf->list);
1290 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
1291 }
1292 spin_unlock_irqrestore(&dev->slock, flags);
1293 return rc;
1294 }
1295
em28xx_stop_streaming(struct vb2_queue * vq)1296 static void em28xx_stop_streaming(struct vb2_queue *vq)
1297 {
1298 struct em28xx *dev = vb2_get_drv_priv(vq);
1299 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1300 struct em28xx_dmaqueue *vidq = &dev->vidq;
1301 unsigned long flags = 0;
1302
1303 em28xx_videodbg("%s\n", __func__);
1304
1305 res_free(dev, vq->type);
1306
1307 if (v4l2->streaming_users-- == 1) {
1308 /* Disable video stream at TV decoder */
1309 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1310
1311 /* Last active user, so shutdown all the URBS */
1312 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1313 }
1314
1315 spin_lock_irqsave(&dev->slock, flags);
1316 if (dev->usb_ctl.vid_buf) {
1317 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1318 VB2_BUF_STATE_ERROR);
1319 dev->usb_ctl.vid_buf = NULL;
1320 }
1321 while (!list_empty(&vidq->active)) {
1322 struct em28xx_buffer *buf;
1323
1324 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1325 list_del(&buf->list);
1326 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1327 }
1328 spin_unlock_irqrestore(&dev->slock, flags);
1329 }
1330
em28xx_stop_vbi_streaming(struct vb2_queue * vq)1331 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1332 {
1333 struct em28xx *dev = vb2_get_drv_priv(vq);
1334 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1335 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1336 unsigned long flags = 0;
1337
1338 em28xx_videodbg("%s\n", __func__);
1339
1340 res_free(dev, vq->type);
1341
1342 if (v4l2->streaming_users-- == 1) {
1343 /* Disable video stream at TV decoder */
1344 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1345
1346 /* Last active user, so shutdown all the URBS */
1347 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1348 }
1349
1350 spin_lock_irqsave(&dev->slock, flags);
1351 if (dev->usb_ctl.vbi_buf) {
1352 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1353 VB2_BUF_STATE_ERROR);
1354 dev->usb_ctl.vbi_buf = NULL;
1355 }
1356 while (!list_empty(&vbiq->active)) {
1357 struct em28xx_buffer *buf;
1358
1359 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1360 list_del(&buf->list);
1361 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1362 }
1363 spin_unlock_irqrestore(&dev->slock, flags);
1364 }
1365
1366 static void
buffer_queue(struct vb2_buffer * vb)1367 buffer_queue(struct vb2_buffer *vb)
1368 {
1369 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1370 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1371 struct em28xx_buffer *buf =
1372 container_of(vbuf, struct em28xx_buffer, vb);
1373 struct em28xx_dmaqueue *vidq = &dev->vidq;
1374 unsigned long flags = 0;
1375
1376 em28xx_videodbg("%s\n", __func__);
1377 buf->mem = vb2_plane_vaddr(vb, 0);
1378 buf->length = vb2_plane_size(vb, 0);
1379
1380 spin_lock_irqsave(&dev->slock, flags);
1381 list_add_tail(&buf->list, &vidq->active);
1382 spin_unlock_irqrestore(&dev->slock, flags);
1383 }
1384
1385 static const struct vb2_ops em28xx_video_qops = {
1386 .queue_setup = queue_setup,
1387 .buf_prepare = buffer_prepare,
1388 .buf_queue = buffer_queue,
1389 .start_streaming = em28xx_start_analog_streaming,
1390 .stop_streaming = em28xx_stop_streaming,
1391 };
1392
em28xx_vb2_setup(struct em28xx * dev)1393 static int em28xx_vb2_setup(struct em28xx *dev)
1394 {
1395 int rc;
1396 struct vb2_queue *q;
1397 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1398
1399 /* Setup Videobuf2 for Video capture */
1400 q = &v4l2->vb_vidq;
1401 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1402 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1403 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1404 q->drv_priv = dev;
1405 q->buf_struct_size = sizeof(struct em28xx_buffer);
1406 q->ops = &em28xx_video_qops;
1407 q->mem_ops = &vb2_vmalloc_memops;
1408
1409 rc = vb2_queue_init(q);
1410 if (rc < 0)
1411 return rc;
1412
1413 /* Setup Videobuf2 for VBI capture */
1414 q = &v4l2->vb_vbiq;
1415 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1416 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1417 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1418 q->drv_priv = dev;
1419 q->buf_struct_size = sizeof(struct em28xx_buffer);
1420 q->ops = &em28xx_vbi_qops;
1421 q->mem_ops = &vb2_vmalloc_memops;
1422
1423 rc = vb2_queue_init(q);
1424 if (rc < 0)
1425 return rc;
1426
1427 return 0;
1428 }
1429
1430 /*
1431 * v4l2 interface
1432 */
1433
video_mux(struct em28xx * dev,int index)1434 static void video_mux(struct em28xx *dev, int index)
1435 {
1436 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1437
1438 dev->ctl_input = index;
1439 dev->ctl_ainput = INPUT(index)->amux;
1440 dev->ctl_aoutput = INPUT(index)->aout;
1441
1442 if (!dev->ctl_aoutput)
1443 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1444
1445 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1446 INPUT(index)->vmux, 0, 0);
1447
1448 if (dev->has_msp34xx) {
1449 if (dev->i2s_speed) {
1450 v4l2_device_call_all(v4l2_dev, 0, audio,
1451 s_i2s_clock_freq, dev->i2s_speed);
1452 }
1453 /* Note: this is msp3400 specific */
1454 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1455 dev->ctl_ainput,
1456 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1457 }
1458
1459 if (dev->board.decoder == EM28XX_BUILTIN) {
1460 em2828X_decoder_vmux(dev, INPUT(index)->vmux);
1461 em2828X_decoder_set_std(dev, dev->v4l2->norm);
1462
1463 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
1464 }
1465
1466 if (dev->board.adecoder != EM28XX_NOADECODER) {
1467 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1468 dev->ctl_ainput, dev->ctl_aoutput, 0);
1469 }
1470
1471 em28xx_audio_analog_set(dev);
1472 }
1473
em28xx_ctrl_notify(struct v4l2_ctrl * ctrl,void * priv)1474 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1475 {
1476 struct em28xx *dev = priv;
1477
1478 /*
1479 * In the case of non-AC97 volume controls, we still need
1480 * to do some setups at em28xx, in order to mute/unmute
1481 * and to adjust audio volume. However, the value ranges
1482 * should be checked by the corresponding V4L subdriver.
1483 */
1484 switch (ctrl->id) {
1485 case V4L2_CID_AUDIO_MUTE:
1486 dev->mute = ctrl->val;
1487 em28xx_audio_analog_set(dev);
1488 break;
1489 case V4L2_CID_AUDIO_VOLUME:
1490 dev->volume = ctrl->val;
1491 em28xx_audio_analog_set(dev);
1492 break;
1493 }
1494 }
1495
em28xx_s_ctrl(struct v4l2_ctrl * ctrl)1496 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1497 {
1498 struct em28xx_v4l2 *v4l2 =
1499 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1500 struct em28xx *dev = v4l2->dev;
1501 int ret = -EINVAL;
1502
1503 switch (ctrl->id) {
1504 case V4L2_CID_AUDIO_MUTE:
1505 dev->mute = ctrl->val;
1506 ret = em28xx_audio_analog_set(dev);
1507 break;
1508 case V4L2_CID_AUDIO_VOLUME:
1509 dev->volume = ctrl->val;
1510 ret = em28xx_audio_analog_set(dev);
1511 break;
1512 case V4L2_CID_CONTRAST:
1513 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1514 break;
1515 case V4L2_CID_BRIGHTNESS:
1516 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1517 break;
1518 case V4L2_CID_SATURATION:
1519 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1520 break;
1521 case V4L2_CID_BLUE_BALANCE:
1522 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1523 break;
1524 case V4L2_CID_RED_BALANCE:
1525 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1526 break;
1527 case V4L2_CID_SHARPNESS:
1528 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1529 break;
1530 }
1531
1532 return (ret < 0) ? ret : 0;
1533 }
1534
1535 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1536 .s_ctrl = em28xx_s_ctrl,
1537 };
1538
size_to_scale(struct em28xx * dev,unsigned int width,unsigned int height,unsigned int * hscale,unsigned int * vscale)1539 static void size_to_scale(struct em28xx *dev,
1540 unsigned int width, unsigned int height,
1541 unsigned int *hscale, unsigned int *vscale)
1542 {
1543 unsigned int maxw = norm_maxw(dev);
1544 unsigned int maxh = norm_maxh(dev);
1545
1546 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1547 if (*hscale > EM28XX_HVSCALE_MAX)
1548 *hscale = EM28XX_HVSCALE_MAX;
1549
1550 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1551 if (*vscale > EM28XX_HVSCALE_MAX)
1552 *vscale = EM28XX_HVSCALE_MAX;
1553 }
1554
scale_to_size(struct em28xx * dev,unsigned int hscale,unsigned int vscale,unsigned int * width,unsigned int * height)1555 static void scale_to_size(struct em28xx *dev,
1556 unsigned int hscale, unsigned int vscale,
1557 unsigned int *width, unsigned int *height)
1558 {
1559 unsigned int maxw = norm_maxw(dev);
1560 unsigned int maxh = norm_maxh(dev);
1561
1562 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1563 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1564
1565 /* Don't let width or height to be zero */
1566 if (*width < 1)
1567 *width = 1;
1568 if (*height < 1)
1569 *height = 1;
1570 }
1571
1572 /*
1573 * IOCTL vidioc handling
1574 */
1575
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)1576 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1577 struct v4l2_format *f)
1578 {
1579 struct em28xx *dev = video_drvdata(file);
1580 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1581
1582 f->fmt.pix.width = v4l2->width;
1583 f->fmt.pix.height = v4l2->height;
1584 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1585 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1586 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1587 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1588
1589 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1590 if (v4l2->progressive)
1591 f->fmt.pix.field = V4L2_FIELD_NONE;
1592 else
1593 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1594 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1595 return 0;
1596 }
1597
format_by_fourcc(unsigned int fourcc)1598 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1599 {
1600 unsigned int i;
1601
1602 for (i = 0; i < ARRAY_SIZE(format); i++)
1603 if (format[i].fourcc == fourcc)
1604 return &format[i];
1605
1606 return NULL;
1607 }
1608
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)1609 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1610 struct v4l2_format *f)
1611 {
1612 struct em28xx *dev = video_drvdata(file);
1613 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1614 unsigned int width = f->fmt.pix.width;
1615 unsigned int height = f->fmt.pix.height;
1616 unsigned int maxw = norm_maxw(dev);
1617 unsigned int maxh = norm_maxh(dev);
1618 unsigned int hscale, vscale;
1619 struct em28xx_fmt *fmt;
1620
1621 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1622 if (!fmt) {
1623 fmt = &format[0];
1624 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1625 f->fmt.pix.pixelformat, fmt->fourcc);
1626 }
1627
1628 if (dev->board.is_em2800) {
1629 /* the em2800 can only scale down to 50% */
1630 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1631 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1632 /*
1633 * MaxPacketSize for em2800 is too small to capture at full
1634 * resolution use half of maxw as the scaler can only scale
1635 * to 50%
1636 */
1637 if (width == maxw && height == maxh)
1638 width /= 2;
1639 } else {
1640 /*
1641 * width must even because of the YUYV format
1642 * height must be even because of interlacing
1643 */
1644 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1645 1, 0);
1646 }
1647 /* Avoid division by zero at size_to_scale */
1648 if (width < 1)
1649 width = 1;
1650 if (height < 1)
1651 height = 1;
1652
1653 size_to_scale(dev, width, height, &hscale, &vscale);
1654 scale_to_size(dev, hscale, vscale, &width, &height);
1655
1656 f->fmt.pix.width = width;
1657 f->fmt.pix.height = height;
1658 f->fmt.pix.pixelformat = fmt->fourcc;
1659 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1660 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1661 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1662 if (v4l2->progressive)
1663 f->fmt.pix.field = V4L2_FIELD_NONE;
1664 else
1665 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1666 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1667
1668 return 0;
1669 }
1670
em28xx_set_video_format(struct em28xx * dev,unsigned int fourcc,unsigned int width,unsigned int height)1671 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1672 unsigned int width, unsigned int height)
1673 {
1674 struct em28xx_fmt *fmt;
1675 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1676
1677 fmt = format_by_fourcc(fourcc);
1678 if (!fmt)
1679 return -EINVAL;
1680
1681 v4l2->format = fmt;
1682 v4l2->width = width;
1683 v4l2->height = height;
1684
1685 /* set new image size */
1686 size_to_scale(dev, v4l2->width, v4l2->height,
1687 &v4l2->hscale, &v4l2->vscale);
1688
1689 em28xx_resolution_set(dev);
1690
1691 return 0;
1692 }
1693
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)1694 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1695 struct v4l2_format *f)
1696 {
1697 struct em28xx *dev = video_drvdata(file);
1698 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1699
1700 if (vb2_is_busy(&v4l2->vb_vidq))
1701 return -EBUSY;
1702
1703 vidioc_try_fmt_vid_cap(file, priv, f);
1704
1705 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1706 f->fmt.pix.width, f->fmt.pix.height);
1707 }
1708
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * norm)1709 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1710 {
1711 struct em28xx *dev = video_drvdata(file);
1712
1713 *norm = dev->v4l2->norm;
1714
1715 return 0;
1716 }
1717
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * norm)1718 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1719 {
1720 struct em28xx *dev = video_drvdata(file);
1721
1722 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1723
1724 return 0;
1725 }
1726
vidioc_s_std(struct file * file,void * priv,v4l2_std_id norm)1727 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1728 {
1729 struct em28xx *dev = video_drvdata(file);
1730 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1731 struct v4l2_format f;
1732
1733 if (norm == v4l2->norm)
1734 return 0;
1735
1736 if (v4l2->streaming_users > 0)
1737 return -EBUSY;
1738
1739 v4l2->norm = norm;
1740
1741 /* Adjusts width/height, if needed */
1742 f.fmt.pix.width = 720;
1743 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1744 vidioc_try_fmt_vid_cap(file, priv, &f);
1745
1746 /* set new image size */
1747 v4l2->width = f.fmt.pix.width;
1748 v4l2->height = f.fmt.pix.height;
1749 size_to_scale(dev, v4l2->width, v4l2->height,
1750 &v4l2->hscale, &v4l2->vscale);
1751
1752 em28xx_resolution_set(dev);
1753 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1754
1755 if (dev->board.decoder == EM28XX_BUILTIN)
1756 em2828X_decoder_set_std(dev, v4l2->norm);
1757
1758 return 0;
1759 }
1760
vidioc_g_parm(struct file * file,void * priv,struct v4l2_streamparm * p)1761 static int vidioc_g_parm(struct file *file, void *priv,
1762 struct v4l2_streamparm *p)
1763 {
1764 struct v4l2_subdev_frame_interval ival = { 0 };
1765 struct em28xx *dev = video_drvdata(file);
1766 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1767 int rc = 0;
1768
1769 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1770 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1771 return -EINVAL;
1772
1773 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1774 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1775 if (dev->is_webcam) {
1776 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1777 pad, get_frame_interval, NULL,
1778 &ival);
1779 if (!rc)
1780 p->parm.capture.timeperframe = ival.interval;
1781 } else {
1782 v4l2_video_std_frame_period(v4l2->norm,
1783 &p->parm.capture.timeperframe);
1784 }
1785
1786 return rc;
1787 }
1788
vidioc_s_parm(struct file * file,void * priv,struct v4l2_streamparm * p)1789 static int vidioc_s_parm(struct file *file, void *priv,
1790 struct v4l2_streamparm *p)
1791 {
1792 struct em28xx *dev = video_drvdata(file);
1793 struct v4l2_subdev_frame_interval ival = {
1794 0,
1795 p->parm.capture.timeperframe
1796 };
1797 int rc = 0;
1798
1799 if (!dev->is_webcam)
1800 return -ENOTTY;
1801
1802 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1803 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1804 return -EINVAL;
1805
1806 memset(&p->parm, 0, sizeof(p->parm));
1807 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1808 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1809 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1810 pad, set_frame_interval, NULL,
1811 &ival);
1812 if (!rc)
1813 p->parm.capture.timeperframe = ival.interval;
1814 return rc;
1815 }
1816
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * i)1817 static int vidioc_enum_input(struct file *file, void *priv,
1818 struct v4l2_input *i)
1819 {
1820 struct em28xx *dev = video_drvdata(file);
1821 unsigned int n;
1822 int j;
1823
1824 n = i->index;
1825 if (n >= MAX_EM28XX_INPUT)
1826 return -EINVAL;
1827 if (!INPUT(n)->type)
1828 return -EINVAL;
1829
1830 i->type = V4L2_INPUT_TYPE_CAMERA;
1831
1832 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));
1833
1834 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1835 i->type = V4L2_INPUT_TYPE_TUNER;
1836
1837 i->std = dev->v4l2->vdev.tvnorms;
1838 /* webcams do not have the STD API */
1839 if (dev->is_webcam)
1840 i->capabilities = 0;
1841
1842 /* Dynamically generates an audioset bitmask */
1843 i->audioset = 0;
1844 for (j = 0; j < MAX_EM28XX_INPUT; j++)
1845 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1846 i->audioset |= 1 << j;
1847
1848 return 0;
1849 }
1850
vidioc_g_input(struct file * file,void * priv,unsigned int * i)1851 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1852 {
1853 struct em28xx *dev = video_drvdata(file);
1854
1855 *i = dev->ctl_input;
1856
1857 return 0;
1858 }
1859
vidioc_s_input(struct file * file,void * priv,unsigned int i)1860 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1861 {
1862 struct em28xx *dev = video_drvdata(file);
1863
1864 if (i >= MAX_EM28XX_INPUT)
1865 return -EINVAL;
1866 if (!INPUT(i)->type)
1867 return -EINVAL;
1868
1869 video_mux(dev, i);
1870 return 0;
1871 }
1872
em28xx_fill_audio_input(struct em28xx * dev,const char * s,struct v4l2_audio * a,unsigned int index)1873 static int em28xx_fill_audio_input(struct em28xx *dev,
1874 const char *s,
1875 struct v4l2_audio *a,
1876 unsigned int index)
1877 {
1878 unsigned int idx = dev->amux_map[index];
1879
1880 /*
1881 * With msp3400, almost all mappings use the default (amux = 0).
1882 * The only one may use a different value is WinTV USB2, where it
1883 * can also be SCART1 input.
1884 * As it is very doubtful that we would see new boards with msp3400,
1885 * let's just reuse the existing switch.
1886 */
1887 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1888 idx = EM28XX_AMUX_LINE_IN;
1889
1890 switch (idx) {
1891 case EM28XX_AMUX_VIDEO:
1892 strscpy(a->name, "Television", sizeof(a->name));
1893 break;
1894 case EM28XX_AMUX_LINE_IN:
1895 strscpy(a->name, "Line In", sizeof(a->name));
1896 break;
1897 case EM28XX_AMUX_VIDEO2:
1898 strscpy(a->name, "Television alt", sizeof(a->name));
1899 break;
1900 case EM28XX_AMUX_PHONE:
1901 strscpy(a->name, "Phone", sizeof(a->name));
1902 break;
1903 case EM28XX_AMUX_MIC:
1904 strscpy(a->name, "Mic", sizeof(a->name));
1905 break;
1906 case EM28XX_AMUX_CD:
1907 strscpy(a->name, "CD", sizeof(a->name));
1908 break;
1909 case EM28XX_AMUX_AUX:
1910 strscpy(a->name, "Aux", sizeof(a->name));
1911 break;
1912 case EM28XX_AMUX_PCM_OUT:
1913 strscpy(a->name, "PCM", sizeof(a->name));
1914 break;
1915 case EM28XX_AMUX_UNUSED:
1916 default:
1917 return -EINVAL;
1918 }
1919 a->index = index;
1920 a->capability = V4L2_AUDCAP_STEREO;
1921
1922 em28xx_videodbg("%s: audio input index %d is '%s'\n",
1923 s, a->index, a->name);
1924
1925 return 0;
1926 }
1927
vidioc_enumaudio(struct file * file,void * fh,struct v4l2_audio * a)1928 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1929 {
1930 struct em28xx *dev = video_drvdata(file);
1931
1932 if (a->index >= MAX_EM28XX_INPUT)
1933 return -EINVAL;
1934
1935 return em28xx_fill_audio_input(dev, __func__, a, a->index);
1936 }
1937
vidioc_g_audio(struct file * file,void * priv,struct v4l2_audio * a)1938 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1939 {
1940 struct em28xx *dev = video_drvdata(file);
1941 int i;
1942
1943 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1944 if (dev->ctl_ainput == dev->amux_map[i])
1945 return em28xx_fill_audio_input(dev, __func__, a, i);
1946
1947 /* Should never happen! */
1948 return -EINVAL;
1949 }
1950
vidioc_s_audio(struct file * file,void * priv,const struct v4l2_audio * a)1951 static int vidioc_s_audio(struct file *file, void *priv,
1952 const struct v4l2_audio *a)
1953 {
1954 struct em28xx *dev = video_drvdata(file);
1955 int idx, i;
1956
1957 if (a->index >= MAX_EM28XX_INPUT)
1958 return -EINVAL;
1959
1960 idx = dev->amux_map[a->index];
1961
1962 if (idx == EM28XX_AMUX_UNUSED)
1963 return -EINVAL;
1964
1965 dev->ctl_ainput = idx;
1966
1967 /*
1968 * FIXME: This is wrong, as different inputs at em28xx_cards
1969 * may have different audio outputs. So, the right thing
1970 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT.
1971 * With the current board definitions, this would work fine,
1972 * as, currently, all boards fit.
1973 */
1974 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1975 if (idx == dev->amux_map[i])
1976 break;
1977 if (i == MAX_EM28XX_INPUT)
1978 return -EINVAL;
1979
1980 dev->ctl_aoutput = INPUT(i)->aout;
1981
1982 if (!dev->ctl_aoutput)
1983 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1984
1985 em28xx_videodbg("%s: set audio input to %d\n", __func__,
1986 dev->ctl_ainput);
1987
1988 return 0;
1989 }
1990
vidioc_g_tuner(struct file * file,void * priv,struct v4l2_tuner * t)1991 static int vidioc_g_tuner(struct file *file, void *priv,
1992 struct v4l2_tuner *t)
1993 {
1994 struct em28xx *dev = video_drvdata(file);
1995
1996 if (t->index != 0)
1997 return -EINVAL;
1998
1999 strscpy(t->name, "Tuner", sizeof(t->name));
2000
2001 t->type = V4L2_TUNER_ANALOG_TV;
2002 t->capability = V4L2_TUNER_CAP_NORM;
2003 t->rangehigh = 0xffffffffUL;
2004 t->signal = 0xffff; /* LOCKED */
2005
2006 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2007 return 0;
2008 }
2009
vidioc_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * t)2010 static int vidioc_s_tuner(struct file *file, void *priv,
2011 const struct v4l2_tuner *t)
2012 {
2013 struct em28xx *dev = video_drvdata(file);
2014
2015 if (t->index != 0)
2016 return -EINVAL;
2017
2018 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2019 return 0;
2020 }
2021
vidioc_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)2022 static int vidioc_g_frequency(struct file *file, void *priv,
2023 struct v4l2_frequency *f)
2024 {
2025 struct em28xx *dev = video_drvdata(file);
2026 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2027
2028 if (f->tuner != 0)
2029 return -EINVAL;
2030
2031 f->frequency = v4l2->frequency;
2032 return 0;
2033 }
2034
vidioc_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)2035 static int vidioc_s_frequency(struct file *file, void *priv,
2036 const struct v4l2_frequency *f)
2037 {
2038 struct v4l2_frequency new_freq = *f;
2039 struct em28xx *dev = video_drvdata(file);
2040 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2041
2042 if (f->tuner != 0)
2043 return -EINVAL;
2044
2045 switch (dev->model) {
2046 case EM2828X_BOARD_HAUPPAUGE_935_V2:
2047 case EM2828X_BOARD_HAUPPAUGE_955_V2:
2048 case EM2828X_BOARD_HAUPPAUGE_975_V2:
2049 if (dev->em28xx_set_analog_freq)
2050 dev->em28xx_set_analog_freq(dev, f->frequency);
2051 break;
2052 default:
2053 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
2054 break;
2055 }
2056
2057 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
2058 v4l2->frequency = new_freq.frequency;
2059
2060 return 0;
2061 }
2062
2063 #ifdef CONFIG_VIDEO_ADV_DEBUG
vidioc_g_chip_info(struct file * file,void * priv,struct v4l2_dbg_chip_info * chip)2064 static int vidioc_g_chip_info(struct file *file, void *priv,
2065 struct v4l2_dbg_chip_info *chip)
2066 {
2067 struct em28xx *dev = video_drvdata(file);
2068
2069 if (chip->match.addr > 1)
2070 return -EINVAL;
2071 if (chip->match.addr == 1)
2072 strscpy(chip->name, "ac97", sizeof(chip->name));
2073 else
2074 strscpy(chip->name,
2075 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
2076 return 0;
2077 }
2078
em28xx_reg_len(int reg)2079 static int em28xx_reg_len(int reg)
2080 {
2081 switch (reg) {
2082 case EM28XX_R40_AC97LSB:
2083 case EM28XX_R30_HSCALELOW:
2084 case EM28XX_R32_VSCALELOW:
2085 return 2;
2086 default:
2087 return 1;
2088 }
2089 }
2090
vidioc_g_register(struct file * file,void * priv,struct v4l2_dbg_register * reg)2091 static int vidioc_g_register(struct file *file, void *priv,
2092 struct v4l2_dbg_register *reg)
2093 {
2094 struct em28xx *dev = video_drvdata(file);
2095 int ret;
2096
2097 if (reg->match.addr > 1)
2098 return -EINVAL;
2099 if (reg->match.addr) {
2100 ret = em28xx_read_ac97(dev, reg->reg);
2101 if (ret < 0)
2102 return ret;
2103
2104 reg->val = ret;
2105 reg->size = 1;
2106 return 0;
2107 }
2108
2109 /* Match host */
2110 reg->size = em28xx_reg_len(reg->reg);
2111 if (reg->size == 1) {
2112 ret = em28xx_read_reg(dev, reg->reg);
2113
2114 if (ret < 0)
2115 return ret;
2116
2117 reg->val = ret;
2118 } else {
2119 __le16 val = 0;
2120
2121 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
2122 reg->reg, (char *)&val, 2);
2123 if (ret < 0)
2124 return ret;
2125
2126 reg->val = le16_to_cpu(val);
2127 }
2128
2129 return 0;
2130 }
2131
vidioc_s_register(struct file * file,void * priv,const struct v4l2_dbg_register * reg)2132 static int vidioc_s_register(struct file *file, void *priv,
2133 const struct v4l2_dbg_register *reg)
2134 {
2135 struct em28xx *dev = video_drvdata(file);
2136 __le16 buf;
2137
2138 if (reg->match.addr > 1)
2139 return -EINVAL;
2140 if (reg->match.addr)
2141 return em28xx_write_ac97(dev, reg->reg, reg->val);
2142
2143 /* Match host */
2144 buf = cpu_to_le16(reg->val);
2145
2146 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
2147 em28xx_reg_len(reg->reg));
2148 }
2149 #endif
2150
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)2151 static int vidioc_querycap(struct file *file, void *priv,
2152 struct v4l2_capability *cap)
2153 {
2154 struct em28xx *dev = video_drvdata(file);
2155 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2156 struct usb_device *udev = interface_to_usbdev(dev->intf);
2157
2158 strscpy(cap->driver, "em28xx", sizeof(cap->driver));
2159 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
2160 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info));
2161
2162 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
2163 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
2164 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2165 cap->capabilities |= V4L2_CAP_AUDIO;
2166 if (dev->tuner_type != TUNER_ABSENT || em28xx_analogtv_supported(dev))
2167 cap->capabilities |= V4L2_CAP_TUNER;
2168 if (video_is_registered(&v4l2->vbi_dev))
2169 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
2170 if (video_is_registered(&v4l2->radio_dev))
2171 cap->capabilities |= V4L2_CAP_RADIO;
2172 return 0;
2173 }
2174
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)2175 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
2176 struct v4l2_fmtdesc *f)
2177 {
2178 if (unlikely(f->index >= ARRAY_SIZE(format)))
2179 return -EINVAL;
2180
2181 f->pixelformat = format[f->index].fourcc;
2182
2183 return 0;
2184 }
2185
vidioc_enum_framesizes(struct file * file,void * priv,struct v4l2_frmsizeenum * fsize)2186 static int vidioc_enum_framesizes(struct file *file, void *priv,
2187 struct v4l2_frmsizeenum *fsize)
2188 {
2189 struct em28xx *dev = video_drvdata(file);
2190 struct em28xx_fmt *fmt;
2191 unsigned int maxw = norm_maxw(dev);
2192 unsigned int maxh = norm_maxh(dev);
2193
2194 fmt = format_by_fourcc(fsize->pixel_format);
2195 if (!fmt) {
2196 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2197 fsize->pixel_format);
2198 return -EINVAL;
2199 }
2200
2201 if (dev->board.is_em2800) {
2202 if (fsize->index > 1)
2203 return -EINVAL;
2204 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2205 fsize->discrete.width = maxw / (1 + fsize->index);
2206 fsize->discrete.height = maxh / (1 + fsize->index);
2207 return 0;
2208 }
2209
2210 if (fsize->index != 0)
2211 return -EINVAL;
2212
2213 /* Report a continuous range */
2214 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
2215 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
2216 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
2217 if (fsize->stepwise.min_width < 48)
2218 fsize->stepwise.min_width = 48;
2219 if (fsize->stepwise.min_height < 38)
2220 fsize->stepwise.min_height = 38;
2221 fsize->stepwise.max_width = maxw;
2222 fsize->stepwise.max_height = maxh;
2223 fsize->stepwise.step_width = 1;
2224 fsize->stepwise.step_height = 1;
2225 return 0;
2226 }
2227
2228 /* RAW VBI ioctls */
2229
vidioc_g_fmt_vbi_cap(struct file * file,void * priv,struct v4l2_format * format)2230 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2231 struct v4l2_format *format)
2232 {
2233 struct em28xx *dev = video_drvdata(file);
2234 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2235
2236 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2237 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2238 format->fmt.vbi.offset = 0;
2239 format->fmt.vbi.flags = 0;
2240 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2241 format->fmt.vbi.count[0] = v4l2->vbi_height;
2242 format->fmt.vbi.count[1] = v4l2->vbi_height;
2243 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2244
2245 /* Varies by video standard (NTSC, PAL, etc.) */
2246 if (v4l2->norm & V4L2_STD_525_60) {
2247 /* NTSC */
2248 format->fmt.vbi.start[0] = 10;
2249 format->fmt.vbi.start[1] = 273;
2250 } else if (v4l2->norm & V4L2_STD_625_50) {
2251 /* PAL */
2252 format->fmt.vbi.start[0] = 6;
2253 format->fmt.vbi.start[1] = 318;
2254 }
2255
2256 return 0;
2257 }
2258
2259 /*
2260 * RADIO ESPECIFIC IOCTLS
2261 */
2262
radio_g_tuner(struct file * file,void * priv,struct v4l2_tuner * t)2263 static int radio_g_tuner(struct file *file, void *priv,
2264 struct v4l2_tuner *t)
2265 {
2266 struct em28xx *dev = video_drvdata(file);
2267
2268 if (unlikely(t->index > 0))
2269 return -EINVAL;
2270
2271 strscpy(t->name, "Radio", sizeof(t->name));
2272
2273 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2274
2275 return 0;
2276 }
2277
radio_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * t)2278 static int radio_s_tuner(struct file *file, void *priv,
2279 const struct v4l2_tuner *t)
2280 {
2281 struct em28xx *dev = video_drvdata(file);
2282
2283 if (t->index != 0)
2284 return -EINVAL;
2285
2286 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2287
2288 return 0;
2289 }
2290
2291 /*
2292 * em28xx_free_v4l2() - v4l2_device release callback
2293 *
2294 * @v4l2_dev: pointer to struct v4l2_device embedded in struct em28xx_v4l2
2295 *
2296 * Called by the v4l2 core when the last reference to the v4l2_device is
2297 * released. At this point no userspace file handle nor video_device node
2298 * keeps the v4l2 instance alive anymore, so it is safe to release all
2299 * v4l2-related resources and drop the em28xx device reference taken when
2300 * the v4l2 extension was initialized.
2301 */
em28xx_free_v4l2(struct v4l2_device * v4l2_dev)2302 static void em28xx_free_v4l2(struct v4l2_device *v4l2_dev)
2303 {
2304 struct em28xx_v4l2 *v4l2 =
2305 container_of(v4l2_dev, struct em28xx_v4l2, v4l2_dev);
2306 struct em28xx *dev = v4l2->dev;
2307
2308 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2309 v4l2_device_unregister(v4l2_dev);
2310 dev->v4l2 = NULL;
2311 kfree(v4l2);
2312 kref_put(&dev->ref, em28xx_free_device);
2313 }
2314
2315 /*
2316 * em28xx_v4l2_open()
2317 * inits the device and starts isoc transfer
2318 */
em28xx_v4l2_open(struct file * filp)2319 static int em28xx_v4l2_open(struct file *filp)
2320 {
2321 struct video_device *vdev = video_devdata(filp);
2322 struct em28xx *dev = video_drvdata(filp);
2323 struct em28xx_v4l2 *v4l2;
2324 enum v4l2_buf_type fh_type = 0;
2325 int ret;
2326
2327 switch (vdev->vfl_type) {
2328 case VFL_TYPE_VIDEO:
2329 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2330 break;
2331 case VFL_TYPE_VBI:
2332 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2333 break;
2334 case VFL_TYPE_RADIO:
2335 break;
2336 default:
2337 return -EINVAL;
2338 }
2339
2340 if (mutex_lock_interruptible(&dev->lock))
2341 return -ERESTARTSYS;
2342
2343 v4l2 = dev->v4l2;
2344 if (!v4l2) {
2345 mutex_unlock(&dev->lock);
2346 return -ENODEV;
2347 }
2348
2349 em28xx_videodbg("open dev=%s type=%s\n",
2350 video_device_node_name(vdev), v4l2_type_names[fh_type]);
2351
2352 ret = v4l2_fh_open(filp);
2353 if (ret) {
2354 dev_err(&dev->intf->dev,
2355 "%s: v4l2_fh_open() returned error %d\n",
2356 __func__, ret);
2357 mutex_unlock(&dev->lock);
2358 return ret;
2359 }
2360
2361 if (v4l2_fh_is_singular_file(filp)) {
2362 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2363
2364 if (vdev->vfl_type != VFL_TYPE_RADIO)
2365 em28xx_resolution_set(dev);
2366
2367 /*
2368 * Needed, since GPIO might have disabled power
2369 * of some i2c devices
2370 */
2371 em28xx_wake_i2c(dev);
2372 }
2373
2374 if (vdev->vfl_type == VFL_TYPE_RADIO) {
2375 em28xx_videodbg("video_open: setting radio device\n");
2376 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2377 }
2378
2379 mutex_unlock(&dev->lock);
2380
2381 return 0;
2382 }
2383
2384 /*
2385 * em28xx_v4l2_fini()
2386 * unregisters the v4l2,i2c and usb devices
2387 * called when the device gets disconnected or at module unload
2388 */
em28xx_v4l2_fini(struct em28xx * dev)2389 static int em28xx_v4l2_fini(struct em28xx *dev)
2390 {
2391 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2392
2393 if (dev->is_audio_only) {
2394 /* Shouldn't initialize IR for this interface */
2395 return 0;
2396 }
2397
2398 if (!dev->has_video) {
2399 /* This device does not support the v4l2 extension */
2400 return 0;
2401 }
2402
2403 if (!v4l2)
2404 return 0;
2405
2406 dev_info(&dev->intf->dev, "Closing video extension\n");
2407
2408 mutex_lock(&dev->lock);
2409
2410 v4l2_device_disconnect(&v4l2->v4l2_dev);
2411
2412 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2413
2414 em28xx_v4l2_media_release(dev);
2415
2416 if (video_is_registered(&v4l2->radio_dev)) {
2417 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2418 video_device_node_name(&v4l2->radio_dev));
2419 video_unregister_device(&v4l2->radio_dev);
2420 }
2421 if (video_is_registered(&v4l2->vbi_dev)) {
2422 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2423 video_device_node_name(&v4l2->vbi_dev));
2424 vb2_video_unregister_device(&v4l2->vbi_dev);
2425 }
2426 if (video_is_registered(&v4l2->vdev)) {
2427 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2428 video_device_node_name(&v4l2->vdev));
2429 vb2_video_unregister_device(&v4l2->vdev);
2430 }
2431
2432 mutex_unlock(&dev->lock);
2433
2434 /*
2435 * Drop the initial reference taken at v4l2_device_register() time.
2436 * The em28xx_free_v4l2() release callback will be invoked once all
2437 * userspace file handles to the video device nodes are closed.
2438 */
2439 v4l2_device_put(&v4l2->v4l2_dev);
2440
2441 return 0;
2442 }
2443
em28xx_v4l2_suspend(struct em28xx * dev)2444 static int em28xx_v4l2_suspend(struct em28xx *dev)
2445 {
2446 if (dev->is_audio_only)
2447 return 0;
2448
2449 if (!dev->has_video)
2450 return 0;
2451
2452 dev_info(&dev->intf->dev, "Suspending video extension\n");
2453 em28xx_stop_urbs(dev);
2454 return 0;
2455 }
2456
em28xx_v4l2_resume(struct em28xx * dev)2457 static int em28xx_v4l2_resume(struct em28xx *dev)
2458 {
2459 if (dev->is_audio_only)
2460 return 0;
2461
2462 if (!dev->has_video)
2463 return 0;
2464
2465 dev_info(&dev->intf->dev, "Resuming video extension\n");
2466 /* what do we do here */
2467 return 0;
2468 }
2469
2470 /*
2471 * em28xx_v4l2_close()
2472 * stops streaming and deallocates all resources allocated by the v4l2
2473 * calls and ioctls
2474 */
em28xx_v4l2_close(struct file * filp)2475 static int em28xx_v4l2_close(struct file *filp)
2476 {
2477 struct em28xx *dev = video_drvdata(filp);
2478 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2479 struct usb_device *udev = interface_to_usbdev(dev->intf);
2480 int err;
2481 bool last_user;
2482
2483 mutex_lock(&dev->lock);
2484 last_user = v4l2_fh_is_singular_file(filp);
2485 _vb2_fop_release(filp, NULL);
2486
2487 if (last_user) {
2488 /* No sense to try to write to the device */
2489 if (dev->disconnected)
2490 goto exit;
2491
2492 /* Save some power by putting tuner to sleep */
2493 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2494
2495 /* do this before setting alternate! */
2496 em28xx_set_mode(dev, EM28XX_SUSPEND);
2497
2498 /* set alternate 0 */
2499 dev->alt = 0;
2500 em28xx_videodbg("setting alternate 0\n");
2501 err = usb_set_interface(udev, 0, 0);
2502 if (err < 0) {
2503 dev_err(&dev->intf->dev,
2504 "cannot change alternate number to 0 (error=%i)\n",
2505 err);
2506 }
2507 }
2508
2509 exit:
2510 mutex_unlock(&dev->lock);
2511
2512 return 0;
2513 }
2514
2515 static const struct v4l2_file_operations em28xx_v4l_fops = {
2516 .owner = THIS_MODULE,
2517 .open = em28xx_v4l2_open,
2518 .release = em28xx_v4l2_close,
2519 .read = vb2_fop_read,
2520 .poll = vb2_fop_poll,
2521 .mmap = vb2_fop_mmap,
2522 .unlocked_ioctl = video_ioctl2,
2523 };
2524
2525 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2526 .vidioc_querycap = vidioc_querycap,
2527 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2528 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2529 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2530 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2531 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2532 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2533 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2534 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2535 .vidioc_enumaudio = vidioc_enumaudio,
2536 .vidioc_g_audio = vidioc_g_audio,
2537 .vidioc_s_audio = vidioc_s_audio,
2538
2539 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2540 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2541 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2542 .vidioc_querybuf = vb2_ioctl_querybuf,
2543 .vidioc_qbuf = vb2_ioctl_qbuf,
2544 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2545
2546 .vidioc_g_std = vidioc_g_std,
2547 .vidioc_querystd = vidioc_querystd,
2548 .vidioc_s_std = vidioc_s_std,
2549 .vidioc_g_parm = vidioc_g_parm,
2550 .vidioc_s_parm = vidioc_s_parm,
2551 .vidioc_enum_input = vidioc_enum_input,
2552 .vidioc_g_input = vidioc_g_input,
2553 .vidioc_s_input = vidioc_s_input,
2554 .vidioc_streamon = vb2_ioctl_streamon,
2555 .vidioc_streamoff = vb2_ioctl_streamoff,
2556 .vidioc_g_tuner = vidioc_g_tuner,
2557 .vidioc_s_tuner = vidioc_s_tuner,
2558 .vidioc_g_frequency = vidioc_g_frequency,
2559 .vidioc_s_frequency = vidioc_s_frequency,
2560 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2561 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2562 #ifdef CONFIG_VIDEO_ADV_DEBUG
2563 .vidioc_g_chip_info = vidioc_g_chip_info,
2564 .vidioc_g_register = vidioc_g_register,
2565 .vidioc_s_register = vidioc_s_register,
2566 #endif
2567 };
2568
2569 static const struct video_device em28xx_video_template = {
2570 .fops = &em28xx_v4l_fops,
2571 .ioctl_ops = &video_ioctl_ops,
2572 .release = video_device_release_empty,
2573 .tvnorms = V4L2_STD_ALL,
2574 };
2575
2576 static const struct v4l2_file_operations radio_fops = {
2577 .owner = THIS_MODULE,
2578 .open = em28xx_v4l2_open,
2579 .release = em28xx_v4l2_close,
2580 .unlocked_ioctl = video_ioctl2,
2581 };
2582
2583 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2584 .vidioc_querycap = vidioc_querycap,
2585 .vidioc_g_tuner = radio_g_tuner,
2586 .vidioc_s_tuner = radio_s_tuner,
2587 .vidioc_g_frequency = vidioc_g_frequency,
2588 .vidioc_s_frequency = vidioc_s_frequency,
2589 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2590 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2591 #ifdef CONFIG_VIDEO_ADV_DEBUG
2592 .vidioc_g_chip_info = vidioc_g_chip_info,
2593 .vidioc_g_register = vidioc_g_register,
2594 .vidioc_s_register = vidioc_s_register,
2595 #endif
2596 };
2597
2598 static struct video_device em28xx_radio_template = {
2599 .fops = &radio_fops,
2600 .ioctl_ops = &radio_ioctl_ops,
2601 .release = video_device_release_empty,
2602 };
2603
2604 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2605 static unsigned short saa711x_addrs[] = {
2606 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2607 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2608 I2C_CLIENT_END };
2609
2610 static unsigned short tvp5150_addrs[] = {
2611 0xb8 >> 1,
2612 0xba >> 1,
2613 I2C_CLIENT_END
2614 };
2615
2616 static unsigned short msp3400_addrs[] = {
2617 0x80 >> 1,
2618 0x88 >> 1,
2619 I2C_CLIENT_END
2620 };
2621
2622 /******************************** usb interface ******************************/
2623
em28xx_vdev_init(struct em28xx * dev,struct video_device * vfd,const struct video_device * template,const char * type_name)2624 static void em28xx_vdev_init(struct em28xx *dev,
2625 struct video_device *vfd,
2626 const struct video_device *template,
2627 const char *type_name)
2628 {
2629 *vfd = *template;
2630 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2631 vfd->lock = &dev->lock;
2632 if (dev->is_webcam)
2633 vfd->tvnorms = 0;
2634
2635 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2636 dev_name(&dev->intf->dev), type_name);
2637
2638 video_set_drvdata(vfd, dev);
2639 }
2640
em28xx_tuner_setup(struct em28xx * dev,unsigned short tuner_addr)2641 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2642 {
2643 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2644 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2645 struct tuner_setup tun_setup;
2646 struct v4l2_frequency f;
2647
2648 memset(&tun_setup, 0, sizeof(tun_setup));
2649
2650 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2651 tun_setup.tuner_callback = em28xx_tuner_callback;
2652
2653 if (dev->board.radio.type) {
2654 tun_setup.type = dev->board.radio.type;
2655 tun_setup.addr = dev->board.radio_addr;
2656
2657 v4l2_device_call_all(v4l2_dev,
2658 0, tuner, s_type_addr, &tun_setup);
2659 }
2660
2661 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2662 tun_setup.type = dev->tuner_type;
2663 tun_setup.addr = tuner_addr;
2664
2665 v4l2_device_call_all(v4l2_dev,
2666 0, tuner, s_type_addr, &tun_setup);
2667 }
2668
2669 if (dev->board.tda9887_conf) {
2670 struct v4l2_priv_tun_config tda9887_cfg;
2671
2672 tda9887_cfg.tuner = TUNER_TDA9887;
2673 tda9887_cfg.priv = &dev->board.tda9887_conf;
2674
2675 v4l2_device_call_all(v4l2_dev,
2676 0, tuner, s_config, &tda9887_cfg);
2677 }
2678
2679 if (dev->tuner_type == TUNER_XC2028) {
2680 struct v4l2_priv_tun_config xc2028_cfg;
2681 struct xc2028_ctrl ctl;
2682
2683 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2684 memset(&ctl, 0, sizeof(ctl));
2685
2686 em28xx_setup_xc3028(dev, &ctl);
2687
2688 xc2028_cfg.tuner = TUNER_XC2028;
2689 xc2028_cfg.priv = &ctl;
2690
2691 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2692 }
2693
2694 /* configure tuner */
2695 f.tuner = 0;
2696 f.type = V4L2_TUNER_ANALOG_TV;
2697 f.frequency = 9076; /* just a magic number */
2698 v4l2->frequency = f.frequency;
2699 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2700 }
2701
em28xx_v4l2_init(struct em28xx * dev)2702 static int em28xx_v4l2_init(struct em28xx *dev)
2703 {
2704 u8 val;
2705 int ret;
2706 unsigned int maxw;
2707 struct v4l2_ctrl_handler *hdl;
2708 struct em28xx_v4l2 *v4l2;
2709
2710 if (dev->is_audio_only) {
2711 /* Shouldn't initialize IR for this interface */
2712 return 0;
2713 }
2714
2715 if (!dev->has_video) {
2716 /* This device does not support the v4l2 extension */
2717 return 0;
2718 }
2719
2720 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2721
2722 mutex_lock(&dev->lock);
2723
2724 v4l2 = kzalloc_obj(*v4l2);
2725 if (!v4l2) {
2726 mutex_unlock(&dev->lock);
2727 return -ENOMEM;
2728 }
2729 v4l2->dev = dev;
2730 dev->v4l2 = v4l2;
2731
2732 #ifdef CONFIG_MEDIA_CONTROLLER
2733 v4l2->v4l2_dev.mdev = dev->media_dev;
2734 #endif
2735 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2736 if (ret < 0) {
2737 dev_err(&dev->intf->dev,
2738 "Call to v4l2_device_register() failed!\n");
2739 dev->v4l2 = NULL;
2740 kfree(v4l2);
2741 mutex_unlock(&dev->lock);
2742 return ret;
2743 }
2744
2745 /*
2746 * From this point on, em28xx_free_v4l2() will be used to release
2747 * v4l2-related resources when the v4l2_device refcount reaches
2748 * zero. Take a reference to the em28xx device so that it cannot
2749 * be freed before the v4l2 instance is released.
2750 */
2751 v4l2->v4l2_dev.release = em28xx_free_v4l2;
2752 kref_get(&dev->ref);
2753
2754 hdl = &v4l2->ctrl_handler;
2755 v4l2_ctrl_handler_init(hdl, 9);
2756 v4l2->v4l2_dev.ctrl_handler = hdl;
2757
2758 if (dev->is_webcam)
2759 v4l2->progressive = true;
2760
2761 /*
2762 * Default format, used for tvp5150 or saa711x output formats
2763 */
2764 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2765 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2766 EM28XX_VINCTRL_CCIR656_ENABLE;
2767
2768 /* request some modules */
2769
2770 if (dev->has_msp34xx)
2771 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2772 &dev->i2c_adap[dev->def_i2c_bus],
2773 "msp3400", 0, msp3400_addrs);
2774
2775 if (dev->board.decoder == EM28XX_SAA711X)
2776 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2777 &dev->i2c_adap[dev->def_i2c_bus],
2778 "saa7115_auto", 0, saa711x_addrs);
2779
2780 if (dev->board.decoder == EM28XX_TVP5150)
2781 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2782 &dev->i2c_adap[dev->def_i2c_bus],
2783 "tvp5150", 0, tvp5150_addrs);
2784
2785 if (dev->board.adecoder == EM28XX_TVAUDIO)
2786 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2787 &dev->i2c_adap[dev->def_i2c_bus],
2788 "tvaudio", dev->board.tvaudio_addr, NULL);
2789
2790 /* Initialize tuner and camera */
2791
2792 if (dev->board.tuner_type != TUNER_ABSENT) {
2793 unsigned short tuner_addr = dev->board.tuner_addr;
2794 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2795
2796 if (dev->board.radio.type)
2797 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2798 &dev->i2c_adap[dev->def_i2c_bus],
2799 "tuner", dev->board.radio_addr,
2800 NULL);
2801
2802 if (has_demod)
2803 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2804 &dev->i2c_adap[dev->def_i2c_bus],
2805 "tuner", 0,
2806 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2807 if (tuner_addr == 0) {
2808 enum v4l2_i2c_tuner_type type =
2809 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2810 struct v4l2_subdev *sd;
2811
2812 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2813 &dev->i2c_adap[dev->def_i2c_bus],
2814 "tuner", 0,
2815 v4l2_i2c_tuner_addrs(type));
2816
2817 if (sd)
2818 tuner_addr = v4l2_i2c_subdev_addr(sd);
2819 } else {
2820 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2821 &dev->i2c_adap[dev->def_i2c_bus],
2822 "tuner", tuner_addr, NULL);
2823 }
2824
2825 em28xx_tuner_setup(dev, tuner_addr);
2826 }
2827
2828 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2829 em28xx_init_camera(dev);
2830
2831 /* Configure audio */
2832 ret = em28xx_audio_setup(dev);
2833 if (ret < 0) {
2834 dev_err(&dev->intf->dev,
2835 "%s: Error while setting audio - error [%d]!\n",
2836 __func__, ret);
2837 goto unregister_dev;
2838 }
2839 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2840 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2841 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2842 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2843 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2844 } else {
2845 /* install the em28xx notify callback */
2846 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2847 em28xx_ctrl_notify, dev);
2848 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2849 em28xx_ctrl_notify, dev);
2850 }
2851
2852 /* wake i2c devices */
2853 em28xx_wake_i2c(dev);
2854
2855 /* init video dma queues */
2856 INIT_LIST_HEAD(&dev->vidq.active);
2857 INIT_LIST_HEAD(&dev->vbiq.active);
2858
2859 if (dev->has_msp34xx) {
2860 /* Send a reset to other chips via gpio */
2861 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2862 if (ret < 0) {
2863 dev_err(&dev->intf->dev,
2864 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2865 __func__, ret);
2866 goto unregister_dev;
2867 }
2868 usleep_range(10000, 11000);
2869
2870 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2871 if (ret < 0) {
2872 dev_err(&dev->intf->dev,
2873 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2874 __func__, ret);
2875 goto unregister_dev;
2876 }
2877 usleep_range(10000, 11000);
2878 }
2879
2880 /* set default norm */
2881 v4l2->norm = -1;
2882 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2883 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2884
2885 /* Analog specific initialization */
2886 v4l2->format = &format[0];
2887
2888 maxw = norm_maxw(dev);
2889 /*
2890 * MaxPacketSize for em2800 is too small to capture at full resolution
2891 * use half of maxw as the scaler can only scale to 50%
2892 */
2893 if (dev->board.is_em2800)
2894 maxw /= 2;
2895
2896 em28xx_set_video_format(dev, format[0].fourcc,
2897 maxw, norm_maxh(dev));
2898
2899 video_mux(dev, 0);
2900
2901 /* Audio defaults */
2902 dev->mute = 1;
2903 dev->volume = 0x1f;
2904
2905 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2906 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2907 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2908 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2909
2910 em28xx_set_outfmt(dev);
2911
2912 /* Add image controls */
2913
2914 /*
2915 * NOTE: at this point, the subdevices are already registered, so
2916 * bridge controls are only added/enabled when no subdevice provides
2917 * them
2918 */
2919 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2920 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2921 V4L2_CID_CONTRAST,
2922 0, 0x1f, 1, CONTRAST_DEFAULT);
2923 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2924 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2925 V4L2_CID_BRIGHTNESS,
2926 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2927 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2928 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2929 V4L2_CID_SATURATION,
2930 0, 0x1f, 1, SATURATION_DEFAULT);
2931 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2932 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2933 V4L2_CID_BLUE_BALANCE,
2934 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2935 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2936 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2937 V4L2_CID_RED_BALANCE,
2938 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2939 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2940 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2941 V4L2_CID_SHARPNESS,
2942 0, 0x0f, 1, SHARPNESS_DEFAULT);
2943
2944 /* Reset image controls */
2945 em28xx_colorlevels_set_default(dev);
2946 v4l2_ctrl_handler_setup(hdl);
2947 ret = hdl->error;
2948 if (ret)
2949 goto unregister_dev;
2950
2951 /* allocate and fill video video_device struct */
2952 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2953 mutex_init(&v4l2->vb_queue_lock);
2954 mutex_init(&v4l2->vb_vbi_queue_lock);
2955 v4l2->vdev.queue = &v4l2->vb_vidq;
2956 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2957 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE |
2958 V4L2_CAP_STREAMING;
2959 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2960 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO;
2961 if (dev->tuner_type != TUNER_ABSENT || em28xx_analogtv_supported(dev))
2962 v4l2->vdev.device_caps |= V4L2_CAP_TUNER;
2963
2964 /* disable inapplicable ioctls */
2965 if (dev->is_webcam) {
2966 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2967 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2968 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2969 } else {
2970 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2971 }
2972 if ((v4l2->vdev.device_caps & V4L2_CAP_TUNER) == 0) {
2973 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2974 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2975 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2976 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2977 }
2978 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2979 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2980 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2981 }
2982
2983 if (dev->chip_id == CHIP_ID_EM2828X || dev->board.decoder == EM28XX_BUILTIN)
2984 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_ENUM_FRAMESIZES);
2985
2986 /* register v4l2 video video_device */
2987 ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO,
2988 video_nr[dev->devno]);
2989 if (ret) {
2990 dev_err(&dev->intf->dev,
2991 "unable to register video device (error=%i).\n", ret);
2992 goto unregister_dev;
2993 }
2994
2995 /* Allocate and fill vbi video_device struct */
2996 if (em28xx_vbi_supported(dev) == 1) {
2997 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2998 "vbi");
2999
3000 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
3001 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
3002 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING |
3003 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
3004 if ((v4l2->vdev.device_caps & V4L2_CAP_TUNER) == 0)
3005 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER;
3006
3007 /* disable inapplicable ioctls */
3008 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
3009 if ((v4l2->vbi_dev.device_caps & V4L2_CAP_TUNER) == 0) {
3010 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
3011 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
3012 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
3013 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
3014 }
3015 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
3016 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
3017 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
3018 }
3019
3020 /* register v4l2 vbi video_device */
3021 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
3022 vbi_nr[dev->devno]);
3023 if (ret < 0) {
3024 dev_err(&dev->intf->dev,
3025 "unable to register vbi device\n");
3026 goto unregister_dev;
3027 }
3028 }
3029
3030 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
3031 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
3032 "radio");
3033 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
3034 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
3035 radio_nr[dev->devno]);
3036 if (ret < 0) {
3037 dev_err(&dev->intf->dev,
3038 "can't register radio device\n");
3039 goto unregister_dev;
3040 }
3041 dev_info(&dev->intf->dev,
3042 "Registered radio device as %s\n",
3043 video_device_node_name(&v4l2->radio_dev));
3044 }
3045
3046 /* Init entities at the Media Controller */
3047 em28xx_v4l2_create_entities(dev);
3048
3049 #ifdef CONFIG_MEDIA_CONTROLLER
3050 ret = v4l2_mc_create_media_graph(dev->media_dev);
3051 if (ret) {
3052 dev_err(&dev->intf->dev,
3053 "failed to create media graph\n");
3054 em28xx_v4l2_media_release(dev);
3055 goto unregister_dev;
3056 }
3057 #endif
3058
3059 dev_info(&dev->intf->dev,
3060 "V4L2 video device registered as %s\n",
3061 video_device_node_name(&v4l2->vdev));
3062
3063 if (video_is_registered(&v4l2->vbi_dev))
3064 dev_info(&dev->intf->dev,
3065 "V4L2 VBI device registered as %s\n",
3066 video_device_node_name(&v4l2->vbi_dev));
3067
3068 /* Save some power by putting tuner to sleep */
3069 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
3070
3071 /* initialize videobuf2 stuff */
3072 em28xx_vb2_setup(dev);
3073
3074 dev_info(&dev->intf->dev,
3075 "V4L2 extension successfully initialized\n");
3076
3077 mutex_unlock(&dev->lock);
3078 return 0;
3079
3080 unregister_dev:
3081 if (video_is_registered(&v4l2->radio_dev)) {
3082 dev_info(&dev->intf->dev,
3083 "V4L2 device %s deregistered\n",
3084 video_device_node_name(&v4l2->radio_dev));
3085 video_unregister_device(&v4l2->radio_dev);
3086 }
3087 if (video_is_registered(&v4l2->vbi_dev)) {
3088 dev_info(&dev->intf->dev,
3089 "V4L2 device %s deregistered\n",
3090 video_device_node_name(&v4l2->vbi_dev));
3091 vb2_video_unregister_device(&v4l2->vbi_dev);
3092 }
3093 if (video_is_registered(&v4l2->vdev)) {
3094 dev_info(&dev->intf->dev,
3095 "V4L2 device %s deregistered\n",
3096 video_device_node_name(&v4l2->vdev));
3097 vb2_video_unregister_device(&v4l2->vdev);
3098 }
3099
3100 mutex_unlock(&dev->lock);
3101
3102 /*
3103 * Drop the initial reference. em28xx_free_v4l2() will be called
3104 * once the last video_device node release has decremented the
3105 * v4l2_device refcount to zero.
3106 */
3107 v4l2_device_put(&v4l2->v4l2_dev);
3108 return ret;
3109 }
3110
3111 static struct em28xx_ops v4l2_ops = {
3112 .id = EM28XX_V4L2,
3113 .name = "Em28xx v4l2 Extension",
3114 .init = em28xx_v4l2_init,
3115 .fini = em28xx_v4l2_fini,
3116 .suspend = em28xx_v4l2_suspend,
3117 .resume = em28xx_v4l2_resume,
3118 };
3119
em28xx_video_register(void)3120 static int __init em28xx_video_register(void)
3121 {
3122 return em28xx_register_extension(&v4l2_ops);
3123 }
3124
em28xx_video_unregister(void)3125 static void __exit em28xx_video_unregister(void)
3126 {
3127 em28xx_unregister_extension(&v4l2_ops);
3128 }
3129
3130 module_init(em28xx_video_register);
3131 module_exit(em28xx_video_unregister);
3132