1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * tw9910 Video Driver
4 *
5 * Copyright (C) 2017 Jacopo Mondi <jacopo+renesas@jmondi.org>
6 *
7 * Copyright (C) 2008 Renesas Solutions Corp.
8 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
9 *
10 * Based on ov772x driver,
11 *
12 * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
13 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
14 * Copyright (C) 2008 Magnus Damm
15 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
16 */
17
18 #include <linux/clk.h>
19 #include <linux/delay.h>
20 #include <linux/gpio/consumer.h>
21 #include <linux/i2c.h>
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/v4l2-mediabus.h>
27 #include <linux/videodev2.h>
28
29 #include <media/i2c/tw9910.h>
30 #include <media/v4l2-subdev.h>
31
32 #define GET_ID(val) ((val & 0xF8) >> 3)
33 #define GET_REV(val) (val & 0x07)
34
35 /*
36 * register offset
37 */
38 #define ID 0x00 /* Product ID Code Register */
39 #define STATUS1 0x01 /* Chip Status Register I */
40 #define INFORM 0x02 /* Input Format */
41 #define OPFORM 0x03 /* Output Format Control Register */
42 #define DLYCTR 0x04 /* Hysteresis and HSYNC Delay Control */
43 #define OUTCTR1 0x05 /* Output Control I */
44 #define ACNTL1 0x06 /* Analog Control Register 1 */
45 #define CROP_HI 0x07 /* Cropping Register, High */
46 #define VDELAY_LO 0x08 /* Vertical Delay Register, Low */
47 #define VACTIVE_LO 0x09 /* Vertical Active Register, Low */
48 #define HDELAY_LO 0x0A /* Horizontal Delay Register, Low */
49 #define HACTIVE_LO 0x0B /* Horizontal Active Register, Low */
50 #define CNTRL1 0x0C /* Control Register I */
51 #define VSCALE_LO 0x0D /* Vertical Scaling Register, Low */
52 #define SCALE_HI 0x0E /* Scaling Register, High */
53 #define HSCALE_LO 0x0F /* Horizontal Scaling Register, Low */
54 #define BRIGHT 0x10 /* BRIGHTNESS Control Register */
55 #define CONTRAST 0x11 /* CONTRAST Control Register */
56 #define SHARPNESS 0x12 /* SHARPNESS Control Register I */
57 #define SAT_U 0x13 /* Chroma (U) Gain Register */
58 #define SAT_V 0x14 /* Chroma (V) Gain Register */
59 #define HUE 0x15 /* Hue Control Register */
60 #define CORING1 0x17
61 #define CORING2 0x18 /* Coring and IF compensation */
62 #define VBICNTL 0x19 /* VBI Control Register */
63 #define ACNTL2 0x1A /* Analog Control 2 */
64 #define OUTCTR2 0x1B /* Output Control 2 */
65 #define SDT 0x1C /* Standard Selection */
66 #define SDTR 0x1D /* Standard Recognition */
67 #define TEST 0x1F /* Test Control Register */
68 #define CLMPG 0x20 /* Clamping Gain */
69 #define IAGC 0x21 /* Individual AGC Gain */
70 #define AGCGAIN 0x22 /* AGC Gain */
71 #define PEAKWT 0x23 /* White Peak Threshold */
72 #define CLMPL 0x24 /* Clamp level */
73 #define SYNCT 0x25 /* Sync Amplitude */
74 #define MISSCNT 0x26 /* Sync Miss Count Register */
75 #define PCLAMP 0x27 /* Clamp Position Register */
76 #define VCNTL1 0x28 /* Vertical Control I */
77 #define VCNTL2 0x29 /* Vertical Control II */
78 #define CKILL 0x2A /* Color Killer Level Control */
79 #define COMB 0x2B /* Comb Filter Control */
80 #define LDLY 0x2C /* Luma Delay and H Filter Control */
81 #define MISC1 0x2D /* Miscellaneous Control I */
82 #define LOOP 0x2E /* LOOP Control Register */
83 #define MISC2 0x2F /* Miscellaneous Control II */
84 #define MVSN 0x30 /* Macrovision Detection */
85 #define STATUS2 0x31 /* Chip STATUS II */
86 #define HFREF 0x32 /* H monitor */
87 #define CLMD 0x33 /* CLAMP MODE */
88 #define IDCNTL 0x34 /* ID Detection Control */
89 #define CLCNTL1 0x35 /* Clamp Control I */
90 #define ANAPLLCTL 0x4C
91 #define VBIMIN 0x4D
92 #define HSLOWCTL 0x4E
93 #define WSS3 0x4F
94 #define FILLDATA 0x50
95 #define SDID 0x51
96 #define DID 0x52
97 #define WSS1 0x53
98 #define WSS2 0x54
99 #define VVBI 0x55
100 #define LCTL6 0x56
101 #define LCTL7 0x57
102 #define LCTL8 0x58
103 #define LCTL9 0x59
104 #define LCTL10 0x5A
105 #define LCTL11 0x5B
106 #define LCTL12 0x5C
107 #define LCTL13 0x5D
108 #define LCTL14 0x5E
109 #define LCTL15 0x5F
110 #define LCTL16 0x60
111 #define LCTL17 0x61
112 #define LCTL18 0x62
113 #define LCTL19 0x63
114 #define LCTL20 0x64
115 #define LCTL21 0x65
116 #define LCTL22 0x66
117 #define LCTL23 0x67
118 #define LCTL24 0x68
119 #define LCTL25 0x69
120 #define LCTL26 0x6A
121 #define HSBEGIN 0x6B
122 #define HSEND 0x6C
123 #define OVSDLY 0x6D
124 #define OVSEND 0x6E
125 #define VBIDELAY 0x6F
126
127 /*
128 * register detail
129 */
130
131 /* INFORM */
132 #define FC27_ON 0x40 /* 1 : Input crystal clock frequency is 27MHz */
133 #define FC27_FF 0x00 /* 0 : Square pixel mode. */
134 /* Must use 24.54MHz for 60Hz field rate */
135 /* source or 29.5MHz for 50Hz field rate */
136 #define IFSEL_S 0x10 /* 01 : S-video decoding */
137 #define IFSEL_C 0x00 /* 00 : Composite video decoding */
138 /* Y input video selection */
139 #define YSEL_M0 0x00 /* 00 : Mux0 selected */
140 #define YSEL_M1 0x04 /* 01 : Mux1 selected */
141 #define YSEL_M2 0x08 /* 10 : Mux2 selected */
142 #define YSEL_M3 0x10 /* 11 : Mux3 selected */
143
144 /* OPFORM */
145 #define MODE 0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
146 /* 1 : ITU-R-656 compatible data sequence format */
147 #define LEN 0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
148 /* 1 : 16-bit YCrCb 4:2:2 output format.*/
149 #define LLCMODE 0x20 /* 1 : LLC output mode. */
150 /* 0 : free-run output mode */
151 #define AINC 0x10 /* Serial interface auto-indexing control */
152 /* 0 : auto-increment */
153 /* 1 : non-auto */
154 #define VSCTL 0x08 /* 1 : Vertical out ctrl by DVALID */
155 /* 0 : Vertical out ctrl by HACTIVE and DVALID */
156 #define OEN_TRI_SEL_MASK 0x07
157 #define OEN_TRI_SEL_ALL_ON 0x00 /* Enable output for Rev0/Rev1 */
158 #define OEN_TRI_SEL_ALL_OFF_r0 0x06 /* All tri-stated for Rev0 */
159 #define OEN_TRI_SEL_ALL_OFF_r1 0x07 /* All tri-stated for Rev1 */
160
161 /* OUTCTR1 */
162 #define VSP_LO 0x00 /* 0 : VS pin output polarity is active low */
163 #define VSP_HI 0x80 /* 1 : VS pin output polarity is active high. */
164 /* VS pin output control */
165 #define VSSL_VSYNC 0x00 /* 0 : VSYNC */
166 #define VSSL_VACT 0x10 /* 1 : VACT */
167 #define VSSL_FIELD 0x20 /* 2 : FIELD */
168 #define VSSL_VVALID 0x30 /* 3 : VVALID */
169 #define VSSL_ZERO 0x70 /* 7 : 0 */
170 #define HSP_LOW 0x00 /* 0 : HS pin output polarity is active low */
171 #define HSP_HI 0x08 /* 1 : HS pin output polarity is active high.*/
172 /* HS pin output control */
173 #define HSSL_HACT 0x00 /* 0 : HACT */
174 #define HSSL_HSYNC 0x01 /* 1 : HSYNC */
175 #define HSSL_DVALID 0x02 /* 2 : DVALID */
176 #define HSSL_HLOCK 0x03 /* 3 : HLOCK */
177 #define HSSL_ASYNCW 0x04 /* 4 : ASYNCW */
178 #define HSSL_ZERO 0x07 /* 7 : 0 */
179
180 /* ACNTL1 */
181 #define SRESET 0x80 /* resets the device to its default state
182 * but all register content remain unchanged.
183 * This bit is self-resetting.
184 */
185 #define ACNTL1_PDN_MASK 0x0e
186 #define CLK_PDN 0x08 /* system clock power down */
187 #define Y_PDN 0x04 /* Luma ADC power down */
188 #define C_PDN 0x02 /* Chroma ADC power down */
189
190 /* ACNTL2 */
191 #define ACNTL2_PDN_MASK 0x40
192 #define PLL_PDN 0x40 /* PLL power down */
193
194 /* VBICNTL */
195
196 /* RTSEL : control the real time signal output from the MPOUT pin */
197 #define RTSEL_MASK 0x07
198 #define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
199 #define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
200 #define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
201 #define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
202 #define RTSEL_MONO 0x04 /* 0100 = MONO */
203 #define RTSEL_DET50 0x05 /* 0101 = DET50 */
204 #define RTSEL_FIELD 0x06 /* 0110 = FIELD */
205 #define RTSEL_RTCO 0x07 /* 0111 = RTCO ( Real Time Control ) */
206
207 /* HSYNC start and end are constant for now */
208 #define HSYNC_START 0x0260
209 #define HSYNC_END 0x0300
210
211 /*
212 * structure
213 */
214
215 struct regval_list {
216 unsigned char reg_num;
217 unsigned char value;
218 };
219
220 struct tw9910_scale_ctrl {
221 char *name;
222 unsigned short width;
223 unsigned short height;
224 u16 hscale;
225 u16 vscale;
226 };
227
228 struct tw9910_priv {
229 struct v4l2_subdev subdev;
230 struct clk *clk;
231 struct tw9910_video_info *info;
232 struct gpio_desc *pdn_gpio;
233 struct gpio_desc *rstb_gpio;
234 const struct tw9910_scale_ctrl *scale;
235 v4l2_std_id norm;
236 u32 revision;
237 };
238
239 static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
240 {
241 .name = "NTSC SQ",
242 .width = 640,
243 .height = 480,
244 .hscale = 0x0100,
245 .vscale = 0x0100,
246 },
247 {
248 .name = "NTSC CCIR601",
249 .width = 720,
250 .height = 480,
251 .hscale = 0x0100,
252 .vscale = 0x0100,
253 },
254 {
255 .name = "NTSC SQ (CIF)",
256 .width = 320,
257 .height = 240,
258 .hscale = 0x0200,
259 .vscale = 0x0200,
260 },
261 {
262 .name = "NTSC CCIR601 (CIF)",
263 .width = 360,
264 .height = 240,
265 .hscale = 0x0200,
266 .vscale = 0x0200,
267 },
268 {
269 .name = "NTSC SQ (QCIF)",
270 .width = 160,
271 .height = 120,
272 .hscale = 0x0400,
273 .vscale = 0x0400,
274 },
275 {
276 .name = "NTSC CCIR601 (QCIF)",
277 .width = 180,
278 .height = 120,
279 .hscale = 0x0400,
280 .vscale = 0x0400,
281 },
282 };
283
284 static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
285 {
286 .name = "PAL SQ",
287 .width = 768,
288 .height = 576,
289 .hscale = 0x0100,
290 .vscale = 0x0100,
291 },
292 {
293 .name = "PAL CCIR601",
294 .width = 720,
295 .height = 576,
296 .hscale = 0x0100,
297 .vscale = 0x0100,
298 },
299 {
300 .name = "PAL SQ (CIF)",
301 .width = 384,
302 .height = 288,
303 .hscale = 0x0200,
304 .vscale = 0x0200,
305 },
306 {
307 .name = "PAL CCIR601 (CIF)",
308 .width = 360,
309 .height = 288,
310 .hscale = 0x0200,
311 .vscale = 0x0200,
312 },
313 {
314 .name = "PAL SQ (QCIF)",
315 .width = 192,
316 .height = 144,
317 .hscale = 0x0400,
318 .vscale = 0x0400,
319 },
320 {
321 .name = "PAL CCIR601 (QCIF)",
322 .width = 180,
323 .height = 144,
324 .hscale = 0x0400,
325 .vscale = 0x0400,
326 },
327 };
328
329 /*
330 * general function
331 */
to_tw9910(const struct i2c_client * client)332 static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
333 {
334 return container_of(i2c_get_clientdata(client), struct tw9910_priv,
335 subdev);
336 }
337
tw9910_mask_set(struct i2c_client * client,u8 command,u8 mask,u8 set)338 static int tw9910_mask_set(struct i2c_client *client, u8 command,
339 u8 mask, u8 set)
340 {
341 s32 val = i2c_smbus_read_byte_data(client, command);
342
343 if (val < 0)
344 return val;
345
346 val &= ~mask;
347 val |= set & mask;
348
349 return i2c_smbus_write_byte_data(client, command, val);
350 }
351
tw9910_set_scale(struct i2c_client * client,const struct tw9910_scale_ctrl * scale)352 static int tw9910_set_scale(struct i2c_client *client,
353 const struct tw9910_scale_ctrl *scale)
354 {
355 int ret;
356
357 ret = i2c_smbus_write_byte_data(client, SCALE_HI,
358 (scale->vscale & 0x0F00) >> 4 |
359 (scale->hscale & 0x0F00) >> 8);
360 if (ret < 0)
361 return ret;
362
363 ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
364 scale->hscale & 0x00FF);
365 if (ret < 0)
366 return ret;
367
368 ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
369 scale->vscale & 0x00FF);
370
371 return ret;
372 }
373
tw9910_set_hsync(struct i2c_client * client)374 static int tw9910_set_hsync(struct i2c_client *client)
375 {
376 struct tw9910_priv *priv = to_tw9910(client);
377 int ret;
378
379 /* bit 10 - 3 */
380 ret = i2c_smbus_write_byte_data(client, HSBEGIN,
381 (HSYNC_START & 0x07F8) >> 3);
382 if (ret < 0)
383 return ret;
384
385 /* bit 10 - 3 */
386 ret = i2c_smbus_write_byte_data(client, HSEND,
387 (HSYNC_END & 0x07F8) >> 3);
388 if (ret < 0)
389 return ret;
390
391 /* So far only revisions 0 and 1 have been seen. */
392 /* bit 2 - 0 */
393 if (priv->revision == 1)
394 ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
395 (HSYNC_START & 0x0007) << 4 |
396 (HSYNC_END & 0x0007));
397
398 return ret;
399 }
400
tw9910_reset(struct i2c_client * client)401 static void tw9910_reset(struct i2c_client *client)
402 {
403 tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
404 usleep_range(1000, 5000);
405 }
406
tw9910_power(struct i2c_client * client,int enable)407 static int tw9910_power(struct i2c_client *client, int enable)
408 {
409 int ret;
410 u8 acntl1;
411 u8 acntl2;
412
413 if (enable) {
414 acntl1 = 0;
415 acntl2 = 0;
416 } else {
417 acntl1 = CLK_PDN | Y_PDN | C_PDN;
418 acntl2 = PLL_PDN;
419 }
420
421 ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
422 if (ret < 0)
423 return ret;
424
425 return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
426 }
427
tw9910_select_norm(v4l2_std_id norm,u32 width,u32 height)428 static const struct tw9910_scale_ctrl *tw9910_select_norm(v4l2_std_id norm,
429 u32 width, u32 height)
430 {
431 const struct tw9910_scale_ctrl *scale;
432 const struct tw9910_scale_ctrl *ret = NULL;
433 __u32 diff = 0xffffffff, tmp;
434 int size, i;
435
436 if (norm & V4L2_STD_NTSC) {
437 scale = tw9910_ntsc_scales;
438 size = ARRAY_SIZE(tw9910_ntsc_scales);
439 } else if (norm & V4L2_STD_PAL) {
440 scale = tw9910_pal_scales;
441 size = ARRAY_SIZE(tw9910_pal_scales);
442 } else {
443 return NULL;
444 }
445
446 for (i = 0; i < size; i++) {
447 tmp = abs(width - scale[i].width) +
448 abs(height - scale[i].height);
449 if (tmp < diff) {
450 diff = tmp;
451 ret = scale + i;
452 }
453 }
454
455 return ret;
456 }
457
458 /*
459 * subdevice operations
460 */
tw9910_s_stream(struct v4l2_subdev * sd,int enable)461 static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
462 {
463 struct i2c_client *client = v4l2_get_subdevdata(sd);
464 struct tw9910_priv *priv = to_tw9910(client);
465 u8 val;
466 int ret;
467
468 if (!enable) {
469 switch (priv->revision) {
470 case 0:
471 val = OEN_TRI_SEL_ALL_OFF_r0;
472 break;
473 case 1:
474 val = OEN_TRI_SEL_ALL_OFF_r1;
475 break;
476 default:
477 dev_err(&client->dev, "un-supported revision\n");
478 return -EINVAL;
479 }
480 } else {
481 val = OEN_TRI_SEL_ALL_ON;
482
483 if (!priv->scale) {
484 dev_err(&client->dev, "norm select error\n");
485 return -EPERM;
486 }
487
488 dev_dbg(&client->dev, "%s %dx%d\n",
489 priv->scale->name,
490 priv->scale->width,
491 priv->scale->height);
492 }
493
494 ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
495 if (ret < 0)
496 return ret;
497
498 return tw9910_power(client, enable);
499 }
500
tw9910_g_std(struct v4l2_subdev * sd,v4l2_std_id * norm)501 static int tw9910_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
502 {
503 struct i2c_client *client = v4l2_get_subdevdata(sd);
504 struct tw9910_priv *priv = to_tw9910(client);
505
506 *norm = priv->norm;
507
508 return 0;
509 }
510
tw9910_s_std(struct v4l2_subdev * sd,v4l2_std_id norm)511 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
512 {
513 struct i2c_client *client = v4l2_get_subdevdata(sd);
514 struct tw9910_priv *priv = to_tw9910(client);
515 const unsigned int hact = 720;
516 const unsigned int hdelay = 15;
517 unsigned int vact;
518 unsigned int vdelay;
519 int ret;
520
521 if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
522 return -EINVAL;
523
524 priv->norm = norm;
525 if (norm & V4L2_STD_525_60) {
526 vact = 240;
527 vdelay = 18;
528 ret = tw9910_mask_set(client, VVBI, 0x10, 0x10);
529 } else {
530 vact = 288;
531 vdelay = 24;
532 ret = tw9910_mask_set(client, VVBI, 0x10, 0x00);
533 }
534 if (!ret)
535 ret = i2c_smbus_write_byte_data(client, CROP_HI,
536 ((vdelay >> 2) & 0xc0) |
537 ((vact >> 4) & 0x30) |
538 ((hdelay >> 6) & 0x0c) |
539 ((hact >> 8) & 0x03));
540 if (!ret)
541 ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
542 vdelay & 0xff);
543 if (!ret)
544 ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
545 vact & 0xff);
546
547 return ret;
548 }
549
550 #ifdef CONFIG_VIDEO_ADV_DEBUG
tw9910_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)551 static int tw9910_g_register(struct v4l2_subdev *sd,
552 struct v4l2_dbg_register *reg)
553 {
554 struct i2c_client *client = v4l2_get_subdevdata(sd);
555 int ret;
556
557 if (reg->reg > 0xff)
558 return -EINVAL;
559
560 reg->size = 1;
561 ret = i2c_smbus_read_byte_data(client, reg->reg);
562 if (ret < 0)
563 return ret;
564
565 /*
566 * ret = int
567 * reg->val = __u64
568 */
569 reg->val = (__u64)ret;
570
571 return 0;
572 }
573
tw9910_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)574 static int tw9910_s_register(struct v4l2_subdev *sd,
575 const struct v4l2_dbg_register *reg)
576 {
577 struct i2c_client *client = v4l2_get_subdevdata(sd);
578
579 if (reg->reg > 0xff ||
580 reg->val > 0xff)
581 return -EINVAL;
582
583 return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
584 }
585 #endif
586
tw9910_set_gpio_value(struct gpio_desc * desc,int value)587 static void tw9910_set_gpio_value(struct gpio_desc *desc, int value)
588 {
589 if (desc) {
590 gpiod_set_value(desc, value);
591 usleep_range(500, 1000);
592 }
593 }
594
tw9910_power_on(struct tw9910_priv * priv)595 static int tw9910_power_on(struct tw9910_priv *priv)
596 {
597 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
598 int ret;
599
600 if (priv->clk) {
601 ret = clk_prepare_enable(priv->clk);
602 if (ret)
603 return ret;
604 }
605
606 tw9910_set_gpio_value(priv->pdn_gpio, 0);
607
608 /*
609 * FIXME: The reset signal is connected to a shared GPIO on some
610 * platforms (namely the SuperH Migo-R). Until a framework becomes
611 * available to handle this cleanly, request the GPIO temporarily
612 * to avoid conflicts.
613 */
614 priv->rstb_gpio = gpiod_get_optional(&client->dev, "rstb",
615 GPIOD_OUT_LOW);
616 if (IS_ERR(priv->rstb_gpio)) {
617 dev_info(&client->dev, "Unable to get GPIO \"rstb\"");
618 clk_disable_unprepare(priv->clk);
619 tw9910_set_gpio_value(priv->pdn_gpio, 1);
620 return PTR_ERR(priv->rstb_gpio);
621 }
622
623 if (priv->rstb_gpio) {
624 tw9910_set_gpio_value(priv->rstb_gpio, 1);
625 tw9910_set_gpio_value(priv->rstb_gpio, 0);
626
627 gpiod_put(priv->rstb_gpio);
628 }
629
630 return 0;
631 }
632
tw9910_power_off(struct tw9910_priv * priv)633 static int tw9910_power_off(struct tw9910_priv *priv)
634 {
635 clk_disable_unprepare(priv->clk);
636 tw9910_set_gpio_value(priv->pdn_gpio, 1);
637
638 return 0;
639 }
640
tw9910_s_power(struct v4l2_subdev * sd,int on)641 static int tw9910_s_power(struct v4l2_subdev *sd, int on)
642 {
643 struct i2c_client *client = v4l2_get_subdevdata(sd);
644 struct tw9910_priv *priv = to_tw9910(client);
645
646 return on ? tw9910_power_on(priv) : tw9910_power_off(priv);
647 }
648
tw9910_set_frame(struct v4l2_subdev * sd,u32 * width,u32 * height)649 static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
650 {
651 struct i2c_client *client = v4l2_get_subdevdata(sd);
652 struct tw9910_priv *priv = to_tw9910(client);
653 int ret = -EINVAL;
654 u8 val;
655
656 /* Select suitable norm. */
657 priv->scale = tw9910_select_norm(priv->norm, *width, *height);
658 if (!priv->scale)
659 goto tw9910_set_fmt_error;
660
661 /* Reset hardware. */
662 tw9910_reset(client);
663
664 /* Set bus width. */
665 val = 0x00;
666 if (priv->info->buswidth == 16)
667 val = LEN;
668
669 ret = tw9910_mask_set(client, OPFORM, LEN, val);
670 if (ret < 0)
671 goto tw9910_set_fmt_error;
672
673 /* Select MPOUT behavior. */
674 switch (priv->info->mpout) {
675 case TW9910_MPO_VLOSS:
676 val = RTSEL_VLOSS; break;
677 case TW9910_MPO_HLOCK:
678 val = RTSEL_HLOCK; break;
679 case TW9910_MPO_SLOCK:
680 val = RTSEL_SLOCK; break;
681 case TW9910_MPO_VLOCK:
682 val = RTSEL_VLOCK; break;
683 case TW9910_MPO_MONO:
684 val = RTSEL_MONO; break;
685 case TW9910_MPO_DET50:
686 val = RTSEL_DET50; break;
687 case TW9910_MPO_FIELD:
688 val = RTSEL_FIELD; break;
689 case TW9910_MPO_RTCO:
690 val = RTSEL_RTCO; break;
691 default:
692 val = 0;
693 }
694
695 ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
696 if (ret < 0)
697 goto tw9910_set_fmt_error;
698
699 /* Set scale. */
700 ret = tw9910_set_scale(client, priv->scale);
701 if (ret < 0)
702 goto tw9910_set_fmt_error;
703
704 /* Set hsync. */
705 ret = tw9910_set_hsync(client);
706 if (ret < 0)
707 goto tw9910_set_fmt_error;
708
709 *width = priv->scale->width;
710 *height = priv->scale->height;
711
712 return ret;
713
714 tw9910_set_fmt_error:
715
716 tw9910_reset(client);
717 priv->scale = NULL;
718
719 return ret;
720 }
721
tw9910_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)722 static int tw9910_get_selection(struct v4l2_subdev *sd,
723 struct v4l2_subdev_pad_config *cfg,
724 struct v4l2_subdev_selection *sel)
725 {
726 struct i2c_client *client = v4l2_get_subdevdata(sd);
727 struct tw9910_priv *priv = to_tw9910(client);
728
729 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
730 return -EINVAL;
731 /* Only CROP, CROP_DEFAULT and CROP_BOUNDS are supported. */
732 if (sel->target > V4L2_SEL_TGT_CROP_BOUNDS)
733 return -EINVAL;
734
735 sel->r.left = 0;
736 sel->r.top = 0;
737 if (priv->norm & V4L2_STD_NTSC) {
738 sel->r.width = 640;
739 sel->r.height = 480;
740 } else {
741 sel->r.width = 768;
742 sel->r.height = 576;
743 }
744
745 return 0;
746 }
747
tw9910_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)748 static int tw9910_get_fmt(struct v4l2_subdev *sd,
749 struct v4l2_subdev_pad_config *cfg,
750 struct v4l2_subdev_format *format)
751 {
752 struct v4l2_mbus_framefmt *mf = &format->format;
753 struct i2c_client *client = v4l2_get_subdevdata(sd);
754 struct tw9910_priv *priv = to_tw9910(client);
755
756 if (format->pad)
757 return -EINVAL;
758
759 if (!priv->scale) {
760 priv->scale = tw9910_select_norm(priv->norm, 640, 480);
761 if (!priv->scale)
762 return -EINVAL;
763 }
764
765 mf->width = priv->scale->width;
766 mf->height = priv->scale->height;
767 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
768 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
769 mf->field = V4L2_FIELD_INTERLACED_BT;
770
771 return 0;
772 }
773
tw9910_s_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)774 static int tw9910_s_fmt(struct v4l2_subdev *sd,
775 struct v4l2_mbus_framefmt *mf)
776 {
777 u32 width = mf->width, height = mf->height;
778 int ret;
779
780 WARN_ON(mf->field != V4L2_FIELD_ANY &&
781 mf->field != V4L2_FIELD_INTERLACED_BT);
782
783 /* Check color format. */
784 if (mf->code != MEDIA_BUS_FMT_UYVY8_2X8)
785 return -EINVAL;
786
787 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
788
789 ret = tw9910_set_frame(sd, &width, &height);
790 if (ret)
791 return ret;
792
793 mf->width = width;
794 mf->height = height;
795
796 return 0;
797 }
798
tw9910_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)799 static int tw9910_set_fmt(struct v4l2_subdev *sd,
800 struct v4l2_subdev_pad_config *cfg,
801 struct v4l2_subdev_format *format)
802 {
803 struct v4l2_mbus_framefmt *mf = &format->format;
804 struct i2c_client *client = v4l2_get_subdevdata(sd);
805 struct tw9910_priv *priv = to_tw9910(client);
806 const struct tw9910_scale_ctrl *scale;
807
808 if (format->pad)
809 return -EINVAL;
810
811 if (mf->field == V4L2_FIELD_ANY) {
812 mf->field = V4L2_FIELD_INTERLACED_BT;
813 } else if (mf->field != V4L2_FIELD_INTERLACED_BT) {
814 dev_err(&client->dev, "Field type %d invalid\n", mf->field);
815 return -EINVAL;
816 }
817
818 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
819 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
820
821 /* Select suitable norm. */
822 scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
823 if (!scale)
824 return -EINVAL;
825
826 mf->width = scale->width;
827 mf->height = scale->height;
828
829 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
830 return tw9910_s_fmt(sd, mf);
831
832 cfg->try_fmt = *mf;
833
834 return 0;
835 }
836
tw9910_video_probe(struct i2c_client * client)837 static int tw9910_video_probe(struct i2c_client *client)
838 {
839 struct tw9910_priv *priv = to_tw9910(client);
840 s32 id;
841 int ret;
842
843 /* TW9910 only use 8 or 16 bit bus width. */
844 if (priv->info->buswidth != 16 && priv->info->buswidth != 8) {
845 dev_err(&client->dev, "bus width error\n");
846 return -ENODEV;
847 }
848
849 ret = tw9910_s_power(&priv->subdev, 1);
850 if (ret < 0)
851 return ret;
852
853 /*
854 * Check and show Product ID.
855 * So far only revisions 0 and 1 have been seen.
856 */
857 id = i2c_smbus_read_byte_data(client, ID);
858 priv->revision = GET_REV(id);
859 id = GET_ID(id);
860
861 if (id != 0x0b || priv->revision > 0x01) {
862 dev_err(&client->dev, "Product ID error %x:%x\n",
863 id, priv->revision);
864 ret = -ENODEV;
865 goto done;
866 }
867
868 dev_info(&client->dev, "tw9910 Product ID %0x:%0x\n",
869 id, priv->revision);
870
871 priv->norm = V4L2_STD_NTSC;
872 priv->scale = &tw9910_ntsc_scales[0];
873
874 done:
875 tw9910_s_power(&priv->subdev, 0);
876
877 return ret;
878 }
879
880 static const struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
881 #ifdef CONFIG_VIDEO_ADV_DEBUG
882 .g_register = tw9910_g_register,
883 .s_register = tw9910_s_register,
884 #endif
885 .s_power = tw9910_s_power,
886 };
887
tw9910_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)888 static int tw9910_enum_mbus_code(struct v4l2_subdev *sd,
889 struct v4l2_subdev_pad_config *cfg,
890 struct v4l2_subdev_mbus_code_enum *code)
891 {
892 if (code->pad || code->index)
893 return -EINVAL;
894
895 code->code = MEDIA_BUS_FMT_UYVY8_2X8;
896
897 return 0;
898 }
899
tw9910_g_tvnorms(struct v4l2_subdev * sd,v4l2_std_id * norm)900 static int tw9910_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
901 {
902 *norm = V4L2_STD_NTSC | V4L2_STD_PAL;
903
904 return 0;
905 }
906
907 static const struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
908 .s_std = tw9910_s_std,
909 .g_std = tw9910_g_std,
910 .s_stream = tw9910_s_stream,
911 .g_tvnorms = tw9910_g_tvnorms,
912 };
913
914 static const struct v4l2_subdev_pad_ops tw9910_subdev_pad_ops = {
915 .enum_mbus_code = tw9910_enum_mbus_code,
916 .get_selection = tw9910_get_selection,
917 .get_fmt = tw9910_get_fmt,
918 .set_fmt = tw9910_set_fmt,
919 };
920
921 static const struct v4l2_subdev_ops tw9910_subdev_ops = {
922 .core = &tw9910_subdev_core_ops,
923 .video = &tw9910_subdev_video_ops,
924 .pad = &tw9910_subdev_pad_ops,
925 };
926
927 /*
928 * i2c_driver function
929 */
930
tw9910_probe(struct i2c_client * client,const struct i2c_device_id * did)931 static int tw9910_probe(struct i2c_client *client,
932 const struct i2c_device_id *did)
933
934 {
935 struct tw9910_priv *priv;
936 struct tw9910_video_info *info;
937 struct i2c_adapter *adapter = client->adapter;
938 int ret;
939
940 if (!client->dev.platform_data) {
941 dev_err(&client->dev, "TW9910: missing platform data!\n");
942 return -EINVAL;
943 }
944
945 info = client->dev.platform_data;
946
947 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
948 dev_err(&client->dev,
949 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE_DATA\n");
950 return -EIO;
951 }
952
953 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
954 if (!priv)
955 return -ENOMEM;
956
957 priv->info = info;
958
959 v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
960
961 priv->clk = clk_get(&client->dev, "xti");
962 if (PTR_ERR(priv->clk) == -ENOENT) {
963 priv->clk = NULL;
964 } else if (IS_ERR(priv->clk)) {
965 dev_err(&client->dev, "Unable to get xti clock\n");
966 return PTR_ERR(priv->clk);
967 }
968
969 priv->pdn_gpio = gpiod_get_optional(&client->dev, "pdn",
970 GPIOD_OUT_HIGH);
971 if (IS_ERR(priv->pdn_gpio)) {
972 dev_info(&client->dev, "Unable to get GPIO \"pdn\"");
973 ret = PTR_ERR(priv->pdn_gpio);
974 goto error_clk_put;
975 }
976
977 ret = tw9910_video_probe(client);
978 if (ret < 0)
979 goto error_gpio_put;
980
981 ret = v4l2_async_register_subdev(&priv->subdev);
982 if (ret)
983 goto error_gpio_put;
984
985 return ret;
986
987 error_gpio_put:
988 if (priv->pdn_gpio)
989 gpiod_put(priv->pdn_gpio);
990 error_clk_put:
991 clk_put(priv->clk);
992
993 return ret;
994 }
995
tw9910_remove(struct i2c_client * client)996 static int tw9910_remove(struct i2c_client *client)
997 {
998 struct tw9910_priv *priv = to_tw9910(client);
999
1000 if (priv->pdn_gpio)
1001 gpiod_put(priv->pdn_gpio);
1002 clk_put(priv->clk);
1003 v4l2_async_unregister_subdev(&priv->subdev);
1004
1005 return 0;
1006 }
1007
1008 static const struct i2c_device_id tw9910_id[] = {
1009 { "tw9910", 0 },
1010 { }
1011 };
1012 MODULE_DEVICE_TABLE(i2c, tw9910_id);
1013
1014 static struct i2c_driver tw9910_i2c_driver = {
1015 .driver = {
1016 .name = "tw9910",
1017 },
1018 .probe = tw9910_probe,
1019 .remove = tw9910_remove,
1020 .id_table = tw9910_id,
1021 };
1022
1023 module_i2c_driver(tw9910_i2c_driver);
1024
1025 MODULE_DESCRIPTION("V4L2 driver for TW9910 video decoder");
1026 MODULE_AUTHOR("Kuninori Morimoto");
1027 MODULE_LICENSE("GPL v2");
1028