?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / i2c / ov772x.c
blob2cc6a678069a2ef1668df5224b30e08e0b3c386b
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * ov772x Camera 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 ov7670 and soc_camera_platform driver,
11 *
12 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
13 * Copyright (C) 2008 Magnus Damm
14 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
15 */
16
17 #include <linux/clk.h>
18 #include <linux/delay.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/i2c.h>
21 #include <linux/init.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/regmap.h>
25 #include <linux/slab.h>
26 #include <linux/v4l2-mediabus.h>
27 #include <linux/videodev2.h>
28
29 #include <media/i2c/ov772x.h>
30
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-device.h>
33 #include <media/v4l2-event.h>
34 #include <media/v4l2-image-sizes.h>
35 #include <media/v4l2-subdev.h>
36
37 /*
38 * register offset
39 */
40 #define GAIN 0x00 /* AGC - Gain control gain setting */
41 #define BLUE 0x01 /* AWB - Blue channel gain setting */
42 #define RED 0x02 /* AWB - Red channel gain setting */
43 #define GREEN 0x03 /* AWB - Green channel gain setting */
44 #define COM1 0x04 /* Common control 1 */
45 #define BAVG 0x05 /* U/B Average Level */
46 #define GAVG 0x06 /* Y/Gb Average Level */
47 #define RAVG 0x07 /* V/R Average Level */
48 #define AECH 0x08 /* Exposure Value - AEC MSBs */
49 #define COM2 0x09 /* Common control 2 */
50 #define PID 0x0A /* Product ID Number MSB */
51 #define VER 0x0B /* Product ID Number LSB */
52 #define COM3 0x0C /* Common control 3 */
53 #define COM4 0x0D /* Common control 4 */
54 #define COM5 0x0E /* Common control 5 */
55 #define COM6 0x0F /* Common control 6 */
56 #define AEC 0x10 /* Exposure Value */
57 #define CLKRC 0x11 /* Internal clock */
58 #define COM7 0x12 /* Common control 7 */
59 #define COM8 0x13 /* Common control 8 */
60 #define COM9 0x14 /* Common control 9 */
61 #define COM10 0x15 /* Common control 10 */
62 #define REG16 0x16 /* Register 16 */
63 #define HSTART 0x17 /* Horizontal sensor size */
64 #define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
65 #define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
66 #define VSIZE 0x1A /* Vertical sensor size */
67 #define PSHFT 0x1B /* Data format - pixel delay select */
68 #define MIDH 0x1C /* Manufacturer ID byte - high */
69 #define MIDL 0x1D /* Manufacturer ID byte - low */
70 #define LAEC 0x1F /* Fine AEC value */
71 #define COM11 0x20 /* Common control 11 */
72 #define BDBASE 0x22 /* Banding filter Minimum AEC value */
73 #define DBSTEP 0x23 /* Banding filter Maximum Setp */
74 #define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
75 #define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
76 #define VPT 0x26 /* AGC/AEC Fast mode operating region */
77 #define REG28 0x28 /* Register 28 */
78 #define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
79 #define EXHCH 0x2A /* Dummy pixel insert MSB */
80 #define EXHCL 0x2B /* Dummy pixel insert LSB */
81 #define VOUTSIZE 0x2C /* Vertical data output size MSBs */
82 #define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
83 #define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
84 #define YAVE 0x2F /* Y/G Channel Average value */
85 #define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
86 #define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
87 #define HREF 0x32 /* Image start and size control */
88 #define DM_LNL 0x33 /* Dummy line low 8 bits */
89 #define DM_LNH 0x34 /* Dummy line high 8 bits */
90 #define ADOFF_B 0x35 /* AD offset compensation value for B channel */
91 #define ADOFF_R 0x36 /* AD offset compensation value for R channel */
92 #define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
93 #define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
94 #define OFF_B 0x39 /* Analog process B channel offset value */
95 #define OFF_R 0x3A /* Analog process R channel offset value */
96 #define OFF_GB 0x3B /* Analog process Gb channel offset value */
97 #define OFF_GR 0x3C /* Analog process Gr channel offset value */
98 #define COM12 0x3D /* Common control 12 */
99 #define COM13 0x3E /* Common control 13 */
100 #define COM14 0x3F /* Common control 14 */
101 #define COM15 0x40 /* Common control 15*/
102 #define COM16 0x41 /* Common control 16 */
103 #define TGT_B 0x42 /* BLC blue channel target value */
104 #define TGT_R 0x43 /* BLC red channel target value */
105 #define TGT_GB 0x44 /* BLC Gb channel target value */
106 #define TGT_GR 0x45 /* BLC Gr channel target value */
107 /* for ov7720 */
108 #define LCC0 0x46 /* Lens correction control 0 */
109 #define LCC1 0x47 /* Lens correction option 1 - X coordinate */
110 #define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
111 #define LCC3 0x49 /* Lens correction option 3 */
112 #define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
113 #define LCC5 0x4B /* Lens correction option 5 */
114 #define LCC6 0x4C /* Lens correction option 6 */
115 /* for ov7725 */
116 #define LC_CTR 0x46 /* Lens correction control */
117 #define LC_XC 0x47 /* X coordinate of lens correction center relative */
118 #define LC_YC 0x48 /* Y coordinate of lens correction center relative */
119 #define LC_COEF 0x49 /* Lens correction coefficient */
120 #define LC_RADI 0x4A /* Lens correction radius */
121 #define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
122 #define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
123
124 #define FIXGAIN 0x4D /* Analog fix gain amplifer */
125 #define AREF0 0x4E /* Sensor reference control */
126 #define AREF1 0x4F /* Sensor reference current control */
127 #define AREF2 0x50 /* Analog reference control */
128 #define AREF3 0x51 /* ADC reference control */
129 #define AREF4 0x52 /* ADC reference control */
130 #define AREF5 0x53 /* ADC reference control */
131 #define AREF6 0x54 /* Analog reference control */
132 #define AREF7 0x55 /* Analog reference control */
133 #define UFIX 0x60 /* U channel fixed value output */
134 #define VFIX 0x61 /* V channel fixed value output */
135 #define AWBB_BLK 0x62 /* AWB option for advanced AWB */
136 #define AWB_CTRL0 0x63 /* AWB control byte 0 */
137 #define DSP_CTRL1 0x64 /* DSP control byte 1 */
138 #define DSP_CTRL2 0x65 /* DSP control byte 2 */
139 #define DSP_CTRL3 0x66 /* DSP control byte 3 */
140 #define DSP_CTRL4 0x67 /* DSP control byte 4 */
141 #define AWB_BIAS 0x68 /* AWB BLC level clip */
142 #define AWB_CTRL1 0x69 /* AWB control 1 */
143 #define AWB_CTRL2 0x6A /* AWB control 2 */
144 #define AWB_CTRL3 0x6B /* AWB control 3 */
145 #define AWB_CTRL4 0x6C /* AWB control 4 */
146 #define AWB_CTRL5 0x6D /* AWB control 5 */
147 #define AWB_CTRL6 0x6E /* AWB control 6 */
148 #define AWB_CTRL7 0x6F /* AWB control 7 */
149 #define AWB_CTRL8 0x70 /* AWB control 8 */
150 #define AWB_CTRL9 0x71 /* AWB control 9 */
151 #define AWB_CTRL10 0x72 /* AWB control 10 */
152 #define AWB_CTRL11 0x73 /* AWB control 11 */
153 #define AWB_CTRL12 0x74 /* AWB control 12 */
154 #define AWB_CTRL13 0x75 /* AWB control 13 */
155 #define AWB_CTRL14 0x76 /* AWB control 14 */
156 #define AWB_CTRL15 0x77 /* AWB control 15 */
157 #define AWB_CTRL16 0x78 /* AWB control 16 */
158 #define AWB_CTRL17 0x79 /* AWB control 17 */
159 #define AWB_CTRL18 0x7A /* AWB control 18 */
160 #define AWB_CTRL19 0x7B /* AWB control 19 */
161 #define AWB_CTRL20 0x7C /* AWB control 20 */
162 #define AWB_CTRL21 0x7D /* AWB control 21 */
163 #define GAM1 0x7E /* Gamma Curve 1st segment input end point */
164 #define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
165 #define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
166 #define GAM4 0x81 /* Gamma Curve 4th segment input end point */
167 #define GAM5 0x82 /* Gamma Curve 5th segment input end point */
168 #define GAM6 0x83 /* Gamma Curve 6th segment input end point */
169 #define GAM7 0x84 /* Gamma Curve 7th segment input end point */
170 #define GAM8 0x85 /* Gamma Curve 8th segment input end point */
171 #define GAM9 0x86 /* Gamma Curve 9th segment input end point */
172 #define GAM10 0x87 /* Gamma Curve 10th segment input end point */
173 #define GAM11 0x88 /* Gamma Curve 11th segment input end point */
174 #define GAM12 0x89 /* Gamma Curve 12th segment input end point */
175 #define GAM13 0x8A /* Gamma Curve 13th segment input end point */
176 #define GAM14 0x8B /* Gamma Curve 14th segment input end point */
177 #define GAM15 0x8C /* Gamma Curve 15th segment input end point */
178 #define SLOP 0x8D /* Gamma curve highest segment slope */
179 #define DNSTH 0x8E /* De-noise threshold */
180 #define EDGE_STRNGT 0x8F /* Edge strength control when manual mode */
181 #define EDGE_TRSHLD 0x90 /* Edge threshold control when manual mode */
182 #define DNSOFF 0x91 /* Auto De-noise threshold control */
183 #define EDGE_UPPER 0x92 /* Edge strength upper limit when Auto mode */
184 #define EDGE_LOWER 0x93 /* Edge strength lower limit when Auto mode */
185 #define MTX1 0x94 /* Matrix coefficient 1 */
186 #define MTX2 0x95 /* Matrix coefficient 2 */
187 #define MTX3 0x96 /* Matrix coefficient 3 */
188 #define MTX4 0x97 /* Matrix coefficient 4 */
189 #define MTX5 0x98 /* Matrix coefficient 5 */
190 #define MTX6 0x99 /* Matrix coefficient 6 */
191 #define MTX_CTRL 0x9A /* Matrix control */
192 #define BRIGHT 0x9B /* Brightness control */
193 #define CNTRST 0x9C /* Contrast contrast */
194 #define CNTRST_CTRL 0x9D /* Contrast contrast center */
195 #define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
196 #define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
197 #define SCAL0 0xA0 /* Scaling control 0 */
198 #define SCAL1 0xA1 /* Scaling control 1 */
199 #define SCAL2 0xA2 /* Scaling control 2 */
200 #define FIFODLYM 0xA3 /* FIFO manual mode delay control */
201 #define FIFODLYA 0xA4 /* FIFO auto mode delay control */
202 #define SDE 0xA6 /* Special digital effect control */
203 #define USAT 0xA7 /* U component saturation control */
204 #define VSAT 0xA8 /* V component saturation control */
205 /* for ov7720 */
206 #define HUE0 0xA9 /* Hue control 0 */
207 #define HUE1 0xAA /* Hue control 1 */
208 /* for ov7725 */
209 #define HUECOS 0xA9 /* Cosine value */
210 #define HUESIN 0xAA /* Sine value */
211
212 #define SIGN 0xAB /* Sign bit for Hue and contrast */
213 #define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
214
215 /*
216 * register detail
217 */
218
219 /* COM2 */
220 #define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
221 /* Output drive capability */
222 #define OCAP_1x 0x00 /* 1x */
223 #define OCAP_2x 0x01 /* 2x */
224 #define OCAP_3x 0x02 /* 3x */
225 #define OCAP_4x 0x03 /* 4x */
226
227 /* COM3 */
228 #define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
229 #define IMG_MASK (VFLIP_IMG | HFLIP_IMG)
230
231 #define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
232 #define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
233 #define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
234 #define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
235 #define SWAP_ML 0x08 /* Swap output MSB/LSB */
236 /* Tri-state option for output clock */
237 #define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
238 /* 1: No tri-state at this period */
239 /* Tri-state option for output data */
240 #define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
241 /* 1: No tri-state at this period */
242 #define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
243
244 /* COM4 */
245 /* PLL frequency control */
246 #define PLL_BYPASS 0x00 /* 00: Bypass PLL */
247 #define PLL_4x 0x40 /* 01: PLL 4x */
248 #define PLL_6x 0x80 /* 10: PLL 6x */
249 #define PLL_8x 0xc0 /* 11: PLL 8x */
250 /* AEC evaluate window */
251 #define AEC_FULL 0x00 /* 00: Full window */
252 #define AEC_1p2 0x10 /* 01: 1/2 window */
253 #define AEC_1p4 0x20 /* 10: 1/4 window */
254 #define AEC_2p3 0x30 /* 11: Low 2/3 window */
255 #define COM4_RESERVED 0x01 /* Reserved bit */
256
257 /* COM5 */
258 #define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
259 #define AFR_SPPED 0x40 /* Auto frame rate control speed selection */
260 /* Auto frame rate max rate control */
261 #define AFR_NO_RATE 0x00 /* No reduction of frame rate */
262 #define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
263 #define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
264 #define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
265 /* Auto frame rate active point control */
266 #define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
267 #define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
268 #define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
269 #define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
270 /* AEC max step control */
271 #define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
272 /* 1 : No limit to AEC increase step */
273 /* CLKRC */
274 /* Input clock divider register */
275 #define CLKRC_RESERVED 0x80 /* Reserved bit */
276 #define CLKRC_DIV(n) ((n) - 1)
277
278 /* COM7 */
279 /* SCCB Register Reset */
280 #define SCCB_RESET 0x80 /* 0 : No change */
281 /* 1 : Resets all registers to default */
282 /* Resolution selection */
283 #define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
284 #define SLCT_VGA 0x00 /* 0 : VGA */
285 #define SLCT_QVGA 0x40 /* 1 : QVGA */
286 #define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
287 #define SENSOR_RAW 0x10 /* Sensor RAW */
288 /* RGB output format control */
289 #define FMT_MASK 0x0c /* Mask of color format */
290 #define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
291 #define FMT_RGB565 0x04 /* 01 : RGB 565 */
292 #define FMT_RGB555 0x08 /* 10 : RGB 555 */
293 #define FMT_RGB444 0x0c /* 11 : RGB 444 */
294 /* Output format control */
295 #define OFMT_MASK 0x03 /* Mask of output format */
296 #define OFMT_YUV 0x00 /* 00 : YUV */
297 #define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
298 #define OFMT_RGB 0x02 /* 10 : RGB */
299 #define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
300
301 /* COM8 */
302 #define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
303 /* AEC Setp size limit */
304 #define UNLMT_STEP 0x40 /* 0 : Step size is limited */
305 /* 1 : Unlimited step size */
306 #define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
307 #define AEC_BND 0x10 /* Enable AEC below banding value */
308 #define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
309 #define AGC_ON 0x04 /* AGC Enable */
310 #define AWB_ON 0x02 /* AWB Enable */
311 #define AEC_ON 0x01 /* AEC Enable */
312
313 /* COM9 */
314 #define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
315 /* Automatic gain ceiling - maximum AGC value */
316 #define GAIN_2x 0x00 /* 000 : 2x */
317 #define GAIN_4x 0x10 /* 001 : 4x */
318 #define GAIN_8x 0x20 /* 010 : 8x */
319 #define GAIN_16x 0x30 /* 011 : 16x */
320 #define GAIN_32x 0x40 /* 100 : 32x */
321 #define GAIN_64x 0x50 /* 101 : 64x */
322 #define GAIN_128x 0x60 /* 110 : 128x */
323 #define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
324 #define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
325
326 /* COM11 */
327 #define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
328 #define SGLF_TRIG 0x01 /* Single frame transfer trigger */
329
330 /* HREF */
331 #define HREF_VSTART_SHIFT 6 /* VSTART LSB */
332 #define HREF_HSTART_SHIFT 4 /* HSTART 2 LSBs */
333 #define HREF_VSIZE_SHIFT 2 /* VSIZE LSB */
334 #define HREF_HSIZE_SHIFT 0 /* HSIZE 2 LSBs */
335
336 /* EXHCH */
337 #define EXHCH_VSIZE_SHIFT 2 /* VOUTSIZE LSB */
338 #define EXHCH_HSIZE_SHIFT 0 /* HOUTSIZE 2 LSBs */
339
340 /* DSP_CTRL1 */
341 #define FIFO_ON 0x80 /* FIFO enable/disable selection */
342 #define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
343 #define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
344 #define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
345 #define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
346 #define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
347 #define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
348 #define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
349
350 /* DSP_CTRL3 */
351 #define UV_MASK 0x80 /* UV output sequence option */
352 #define UV_ON 0x80 /* ON */
353 #define UV_OFF 0x00 /* OFF */
354 #define CBAR_MASK 0x20 /* DSP Color bar mask */
355 #define CBAR_ON 0x20 /* ON */
356 #define CBAR_OFF 0x00 /* OFF */
357
358 /* DSP_CTRL4 */
359 #define DSP_OFMT_YUV 0x00
360 #define DSP_OFMT_RGB 0x00
361 #define DSP_OFMT_RAW8 0x02
362 #define DSP_OFMT_RAW10 0x03
363
364 /* DSPAUTO (DSP Auto Function ON/OFF Control) */
365 #define AWB_ACTRL 0x80 /* AWB auto threshold control */
366 #define DENOISE_ACTRL 0x40 /* De-noise auto threshold control */
367 #define EDGE_ACTRL 0x20 /* Edge enhancement auto strength control */
368 #define UV_ACTRL 0x10 /* UV adjust auto slope control */
369 #define SCAL0_ACTRL 0x08 /* Auto scaling factor control */
370 #define SCAL1_2_ACTRL 0x04 /* Auto scaling factor control */
371
372 #define OV772X_MAX_WIDTH VGA_WIDTH
373 #define OV772X_MAX_HEIGHT VGA_HEIGHT
374
375 /*
376 * ID
377 */
378 #define OV7720 0x7720
379 #define OV7725 0x7721
380 #define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
381
382 /*
383 * PLL multipliers
384 */
385 static struct {
386 unsigned int mult;
387 u8 com4;
388 } ov772x_pll[] = {
389 { 1, PLL_BYPASS, },
390 { 4, PLL_4x, },
391 { 6, PLL_6x, },
392 { 8, PLL_8x, },
393 };
394
395 /*
396 * struct
397 */
398
399 struct ov772x_color_format {
400 u32 code;
401 enum v4l2_colorspace colorspace;
402 u8 dsp3;
403 u8 dsp4;
404 u8 com3;
405 u8 com7;
406 };
407
408 struct ov772x_win_size {
409 char *name;
410 unsigned char com7_bit;
411 unsigned int sizeimage;
412 struct v4l2_rect rect;
413 };
414
415 struct ov772x_priv {
416 struct v4l2_subdev subdev;
417 struct v4l2_ctrl_handler hdl;
418 struct clk *clk;
419 struct regmap *regmap;
420 struct ov772x_camera_info *info;
421 struct gpio_desc *pwdn_gpio;
422 struct gpio_desc *rstb_gpio;
423 const struct ov772x_color_format *cfmt;
424 const struct ov772x_win_size *win;
425 struct v4l2_ctrl *vflip_ctrl;
426 struct v4l2_ctrl *hflip_ctrl;
427 /* band_filter = COM8[5] ? 256 - BDBASE : 0 */
428 struct v4l2_ctrl *band_filter_ctrl;
429 unsigned int fps;
430 /* lock to protect power_count and streaming */
431 struct mutex lock;
432 int power_count;
433 int streaming;
434 #ifdef CONFIG_MEDIA_CONTROLLER
435 struct media_pad pad;
436 #endif
437 };
438
439 /*
440 * supported color format list
441 */
442 static const struct ov772x_color_format ov772x_cfmts[] = {
443 {
444 .code = MEDIA_BUS_FMT_YUYV8_2X8,
445 .colorspace = V4L2_COLORSPACE_SRGB,
446 .dsp3 = 0x0,
447 .dsp4 = DSP_OFMT_YUV,
448 .com3 = SWAP_YUV,
449 .com7 = OFMT_YUV,
450 },
451 {
452 .code = MEDIA_BUS_FMT_YVYU8_2X8,
453 .colorspace = V4L2_COLORSPACE_SRGB,
454 .dsp3 = UV_ON,
455 .dsp4 = DSP_OFMT_YUV,
456 .com3 = SWAP_YUV,
457 .com7 = OFMT_YUV,
458 },
459 {
460 .code = MEDIA_BUS_FMT_UYVY8_2X8,
461 .colorspace = V4L2_COLORSPACE_SRGB,
462 .dsp3 = 0x0,
463 .dsp4 = DSP_OFMT_YUV,
464 .com3 = 0x0,
465 .com7 = OFMT_YUV,
466 },
467 {
468 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
469 .colorspace = V4L2_COLORSPACE_SRGB,
470 .dsp3 = 0x0,
471 .dsp4 = DSP_OFMT_YUV,
472 .com3 = SWAP_RGB,
473 .com7 = FMT_RGB555 | OFMT_RGB,
474 },
475 {
476 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
477 .colorspace = V4L2_COLORSPACE_SRGB,
478 .dsp3 = 0x0,
479 .dsp4 = DSP_OFMT_YUV,
480 .com3 = 0x0,
481 .com7 = FMT_RGB555 | OFMT_RGB,
482 },
483 {
484 .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
485 .colorspace = V4L2_COLORSPACE_SRGB,
486 .dsp3 = 0x0,
487 .dsp4 = DSP_OFMT_YUV,
488 .com3 = SWAP_RGB,
489 .com7 = FMT_RGB565 | OFMT_RGB,
490 },
491 {
492 .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
493 .colorspace = V4L2_COLORSPACE_SRGB,
494 .dsp3 = 0x0,
495 .dsp4 = DSP_OFMT_YUV,
496 .com3 = 0x0,
497 .com7 = FMT_RGB565 | OFMT_RGB,
498 },
499 {
500 /* Setting DSP4 to DSP_OFMT_RAW8 still gives 10-bit output,
501 * regardless of the COM7 value. We can thus only support 10-bit
502 * Bayer until someone figures it out.
503 */
504 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
505 .colorspace = V4L2_COLORSPACE_SRGB,
506 .dsp3 = 0x0,
507 .dsp4 = DSP_OFMT_RAW10,
508 .com3 = 0x0,
509 .com7 = SENSOR_RAW | OFMT_BRAW,
510 },
511 };
512
513 /*
514 * window size list
515 */
516
517 static const struct ov772x_win_size ov772x_win_sizes[] = {
518 {
519 .name = "VGA",
520 .com7_bit = SLCT_VGA,
521 .sizeimage = 510 * 748,
522 .rect = {
523 .left = 140,
524 .top = 14,
525 .width = VGA_WIDTH,
526 .height = VGA_HEIGHT,
527 },
528 }, {
529 .name = "QVGA",
530 .com7_bit = SLCT_QVGA,
531 .sizeimage = 278 * 576,
532 .rect = {
533 .left = 252,
534 .top = 6,
535 .width = QVGA_WIDTH,
536 .height = QVGA_HEIGHT,
537 },
538 },
539 };
540
541 /*
542 * frame rate settings lists
543 */
544 static const unsigned int ov772x_frame_intervals[] = { 5, 10, 15, 20, 30, 60 };
545
546 /*
547 * general function
548 */
549
550 static struct ov772x_priv *to_ov772x(struct v4l2_subdev *sd)
551 {
552 return container_of(sd, struct ov772x_priv, subdev);
553 }
554
555 static int ov772x_reset(struct ov772x_priv *priv)
556 {
557 int ret;
558
559 ret = regmap_write(priv->regmap, COM7, SCCB_RESET);
560 if (ret < 0)
561 return ret;
562
563 usleep_range(1000, 5000);
564
565 return regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
566 SOFT_SLEEP_MODE);
567 }
568
569 /*
570 * subdev ops
571 */
572
573 static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
574 {
575 struct i2c_client *client = v4l2_get_subdevdata(sd);
576 struct ov772x_priv *priv = to_ov772x(sd);
577 int ret = 0;
578
579 mutex_lock(&priv->lock);
580
581 if (priv->streaming == enable)
582 goto done;
583
584 ret = regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
585 enable ? 0 : SOFT_SLEEP_MODE);
586 if (ret)
587 goto done;
588
589 if (enable) {
590 dev_dbg(&client->dev, "format %d, win %s\n",
591 priv->cfmt->code, priv->win->name);
592 }
593 priv->streaming = enable;
594
595 done:
596 mutex_unlock(&priv->lock);
597
598 return ret;
599 }
600
601 static unsigned int ov772x_select_fps(struct ov772x_priv *priv,
602 struct v4l2_fract *tpf)
603 {
604 unsigned int fps = tpf->numerator ?
605 tpf->denominator / tpf->numerator :
606 tpf->denominator;
607 unsigned int best_diff;
608 unsigned int diff;
609 unsigned int idx;
610 unsigned int i;
611
612 /* Approximate to the closest supported frame interval. */
613 best_diff = ~0L;
614 for (i = 0, idx = 0; i < ARRAY_SIZE(ov772x_frame_intervals); i++) {
615 diff = abs(fps - ov772x_frame_intervals[i]);
616 if (diff < best_diff) {
617 idx = i;
618 best_diff = diff;
619 }
620 }
621
622 return ov772x_frame_intervals[idx];
623 }
624
625 static int ov772x_set_frame_rate(struct ov772x_priv *priv,
626 unsigned int fps,
627 const struct ov772x_color_format *cfmt,
628 const struct ov772x_win_size *win)
629 {
630 unsigned long fin = clk_get_rate(priv->clk);
631 unsigned int best_diff;
632 unsigned int fsize;
633 unsigned int pclk;
634 unsigned int diff;
635 unsigned int i;
636 u8 clkrc = 0;
637 u8 com4 = 0;
638 int ret;
639
640 /* Use image size (with blankings) to calculate desired pixel clock. */
641 switch (cfmt->com7 & OFMT_MASK) {
642 case OFMT_BRAW:
643 fsize = win->sizeimage;
644 break;
645 case OFMT_RGB:
646 case OFMT_YUV:
647 default:
648 fsize = win->sizeimage * 2;
649 break;
650 }
651
652 pclk = fps * fsize;
653
654 /*
655 * Pixel clock generation circuit is pretty simple:
656 *
657 * Fin -> [ / CLKRC_div] -> [ * PLL_mult] -> pclk
658 *
659 * Try to approximate the desired pixel clock testing all available
660 * PLL multipliers (1x, 4x, 6x, 8x) and calculate corresponding
661 * divisor with:
662 *
663 * div = PLL_mult * Fin / pclk
664 *
665 * and re-calculate the pixel clock using it:
666 *
667 * pclk = Fin * PLL_mult / CLKRC_div
668 *
669 * Choose the PLL_mult and CLKRC_div pair that gives a pixel clock
670 * closer to the desired one.
671 *
672 * The desired pixel clock is calculated using a known frame size
673 * (blanking included) and FPS.
674 */
675 best_diff = ~0L;
676 for (i = 0; i < ARRAY_SIZE(ov772x_pll); i++) {
677 unsigned int pll_mult = ov772x_pll[i].mult;
678 unsigned int pll_out = pll_mult * fin;
679 unsigned int t_pclk;
680 unsigned int div;
681
682 if (pll_out < pclk)
683 continue;
684
685 div = DIV_ROUND_CLOSEST(pll_out, pclk);
686 t_pclk = DIV_ROUND_CLOSEST(fin * pll_mult, div);
687 diff = abs(pclk - t_pclk);
688 if (diff < best_diff) {
689 best_diff = diff;
690 clkrc = CLKRC_DIV(div);
691 com4 = ov772x_pll[i].com4;
692 }
693 }
694
695 ret = regmap_write(priv->regmap, COM4, com4 | COM4_RESERVED);
696 if (ret < 0)
697 return ret;
698
699 ret = regmap_write(priv->regmap, CLKRC, clkrc | CLKRC_RESERVED);
700 if (ret < 0)
701 return ret;
702
703 return 0;
704 }
705
706 static int ov772x_g_frame_interval(struct v4l2_subdev *sd,
707 struct v4l2_subdev_frame_interval *ival)
708 {
709 struct ov772x_priv *priv = to_ov772x(sd);
710 struct v4l2_fract *tpf = &ival->interval;
711
712 tpf->numerator = 1;
713 tpf->denominator = priv->fps;
714
715 return 0;
716 }
717
718 static int ov772x_s_frame_interval(struct v4l2_subdev *sd,
719 struct v4l2_subdev_frame_interval *ival)
720 {
721 struct ov772x_priv *priv = to_ov772x(sd);
722 struct v4l2_fract *tpf = &ival->interval;
723 unsigned int fps;
724 int ret = 0;
725
726 mutex_lock(&priv->lock);
727
728 if (priv->streaming) {
729 ret = -EBUSY;
730 goto error;
731 }
732
733 fps = ov772x_select_fps(priv, tpf);
734
735 /*
736 * If the device is not powered up by the host driver do
737 * not apply any changes to H/W at this time. Instead
738 * the frame rate will be restored right after power-up.
739 */
740 if (priv->power_count > 0) {
741 ret = ov772x_set_frame_rate(priv, fps, priv->cfmt, priv->win);
742 if (ret)
743 goto error;
744 }
745
746 tpf->numerator = 1;
747 tpf->denominator = fps;
748 priv->fps = fps;
749
750 error:
751 mutex_unlock(&priv->lock);
752
753 return ret;
754 }
755
756 static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
757 {
758 struct ov772x_priv *priv = container_of(ctrl->handler,
759 struct ov772x_priv, hdl);
760 struct regmap *regmap = priv->regmap;
761 int ret = 0;
762 u8 val;
763
764 /* v4l2_ctrl_lock() locks our own mutex */
765
766 /*
767 * If the device is not powered up by the host driver do
768 * not apply any controls to H/W at this time. Instead
769 * the controls will be restored right after power-up.
770 */
771 if (priv->power_count == 0)
772 return 0;
773
774 switch (ctrl->id) {
775 case V4L2_CID_VFLIP:
776 val = ctrl->val ? VFLIP_IMG : 0x00;
777 if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
778 val ^= VFLIP_IMG;
779 return regmap_update_bits(regmap, COM3, VFLIP_IMG, val);
780 case V4L2_CID_HFLIP:
781 val = ctrl->val ? HFLIP_IMG : 0x00;
782 if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
783 val ^= HFLIP_IMG;
784 return regmap_update_bits(regmap, COM3, HFLIP_IMG, val);
785 case V4L2_CID_BAND_STOP_FILTER:
786 if (!ctrl->val) {
787 /* Switch the filter off, it is on now */
788 ret = regmap_update_bits(regmap, BDBASE, 0xff, 0xff);
789 if (!ret)
790 ret = regmap_update_bits(regmap, COM8,
791 BNDF_ON_OFF, 0);
792 } else {
793 /* Switch the filter on, set AEC low limit */
794 val = 256 - ctrl->val;
795 ret = regmap_update_bits(regmap, COM8,
796 BNDF_ON_OFF, BNDF_ON_OFF);
797 if (!ret)
798 ret = regmap_update_bits(regmap, BDBASE,
799 0xff, val);
800 }
801
802 return ret;
803 }
804
805 return -EINVAL;
806 }
807
808 #ifdef CONFIG_VIDEO_ADV_DEBUG
809 static int ov772x_g_register(struct v4l2_subdev *sd,
810 struct v4l2_dbg_register *reg)
811 {
812 struct ov772x_priv *priv = to_ov772x(sd);
813 int ret;
814 unsigned int val;
815
816 reg->size = 1;
817 if (reg->reg > 0xff)
818 return -EINVAL;
819
820 ret = regmap_read(priv->regmap, reg->reg, &val);
821 if (ret < 0)
822 return ret;
823
824 reg->val = (__u64)val;
825
826 return 0;
827 }
828
829 static int ov772x_s_register(struct v4l2_subdev *sd,
830 const struct v4l2_dbg_register *reg)
831 {
832 struct ov772x_priv *priv = to_ov772x(sd);
833
834 if (reg->reg > 0xff ||
835 reg->val > 0xff)
836 return -EINVAL;
837
838 return regmap_write(priv->regmap, reg->reg, reg->val);
839 }
840 #endif
841
842 static int ov772x_power_on(struct ov772x_priv *priv)
843 {
844 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
845 int ret;
846
847 if (priv->clk) {
848 ret = clk_prepare_enable(priv->clk);
849 if (ret)
850 return ret;
851 }
852
853 if (priv->pwdn_gpio) {
854 gpiod_set_value(priv->pwdn_gpio, 1);
855 usleep_range(500, 1000);
856 }
857
858 /*
859 * FIXME: The reset signal is connected to a shared GPIO on some
860 * platforms (namely the SuperH Migo-R). Until a framework becomes
861 * available to handle this cleanly, request the GPIO temporarily
862 * to avoid conflicts.
863 */
864 priv->rstb_gpio = gpiod_get_optional(&client->dev, "reset",
865 GPIOD_OUT_LOW);
866 if (IS_ERR(priv->rstb_gpio)) {
867 dev_info(&client->dev, "Unable to get GPIO \"reset\"");
868 clk_disable_unprepare(priv->clk);
869 return PTR_ERR(priv->rstb_gpio);
870 }
871
872 if (priv->rstb_gpio) {
873 gpiod_set_value(priv->rstb_gpio, 1);
874 usleep_range(500, 1000);
875 gpiod_set_value(priv->rstb_gpio, 0);
876 usleep_range(500, 1000);
877
878 gpiod_put(priv->rstb_gpio);
879 }
880
881 return 0;
882 }
883
884 static int ov772x_power_off(struct ov772x_priv *priv)
885 {
886 clk_disable_unprepare(priv->clk);
887
888 if (priv->pwdn_gpio) {
889 gpiod_set_value(priv->pwdn_gpio, 0);
890 usleep_range(500, 1000);
891 }
892
893 return 0;
894 }
895
896 static int ov772x_set_params(struct ov772x_priv *priv,
897 const struct ov772x_color_format *cfmt,
898 const struct ov772x_win_size *win);
899
900 static int ov772x_s_power(struct v4l2_subdev *sd, int on)
901 {
902 struct ov772x_priv *priv = to_ov772x(sd);
903 int ret = 0;
904
905 mutex_lock(&priv->lock);
906
907 /* If the power count is modified from 0 to != 0 or from != 0 to 0,
908 * update the power state.
909 */
910 if (priv->power_count == !on) {
911 if (on) {
912 ret = ov772x_power_on(priv);
913 /*
914 * Restore the format, the frame rate, and
915 * the controls
916 */
917 if (!ret)
918 ret = ov772x_set_params(priv, priv->cfmt,
919 priv->win);
920 } else {
921 ret = ov772x_power_off(priv);
922 }
923 }
924
925 if (!ret) {
926 /* Update the power count. */
927 priv->power_count += on ? 1 : -1;
928 WARN(priv->power_count < 0, "Unbalanced power count\n");
929 WARN(priv->power_count > 1, "Duplicated s_power call\n");
930 }
931
932 mutex_unlock(&priv->lock);
933
934 return ret;
935 }
936
937 static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height)
938 {
939 const struct ov772x_win_size *win = &ov772x_win_sizes[0];
940 u32 best_diff = UINT_MAX;
941 unsigned int i;
942
943 for (i = 0; i < ARRAY_SIZE(ov772x_win_sizes); ++i) {
944 u32 diff = abs(width - ov772x_win_sizes[i].rect.width)
945 + abs(height - ov772x_win_sizes[i].rect.height);
946 if (diff < best_diff) {
947 best_diff = diff;
948 win = &ov772x_win_sizes[i];
949 }
950 }
951
952 return win;
953 }
954
955 static void ov772x_select_params(const struct v4l2_mbus_framefmt *mf,
956 const struct ov772x_color_format **cfmt,
957 const struct ov772x_win_size **win)
958 {
959 unsigned int i;
960
961 /* Select a format. */
962 *cfmt = &ov772x_cfmts[0];
963
964 for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
965 if (mf->code == ov772x_cfmts[i].code) {
966 *cfmt = &ov772x_cfmts[i];
967 break;
968 }
969 }
970
971 /* Select a window size. */
972 *win = ov772x_select_win(mf->width, mf->height);
973 }
974
975 static int ov772x_edgectrl(struct ov772x_priv *priv)
976 {
977 struct regmap *regmap = priv->regmap;
978 int ret;
979
980 if (!priv->info)
981 return 0;
982
983 if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
984 /*
985 * Manual Edge Control Mode.
986 *
987 * Edge auto strength bit is set by default.
988 * Remove it when manual mode.
989 */
990
991 ret = regmap_update_bits(regmap, DSPAUTO, EDGE_ACTRL, 0x00);
992 if (ret < 0)
993 return ret;
994
995 ret = regmap_update_bits(regmap, EDGE_TRSHLD,
996 OV772X_EDGE_THRESHOLD_MASK,
997 priv->info->edgectrl.threshold);
998 if (ret < 0)
999 return ret;
1000
1001 ret = regmap_update_bits(regmap, EDGE_STRNGT,
1002 OV772X_EDGE_STRENGTH_MASK,
1003 priv->info->edgectrl.strength);
1004 if (ret < 0)
1005 return ret;
1006
1007 } else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
1008 /*
1009 * Auto Edge Control Mode.
1010 *
1011 * Set upper and lower limit.
1012 */
1013 ret = regmap_update_bits(regmap, EDGE_UPPER,
1014 OV772X_EDGE_UPPER_MASK,
1015 priv->info->edgectrl.upper);
1016 if (ret < 0)
1017 return ret;
1018
1019 ret = regmap_update_bits(regmap, EDGE_LOWER,
1020 OV772X_EDGE_LOWER_MASK,
1021 priv->info->edgectrl.lower);
1022 if (ret < 0)
1023 return ret;
1024 }
1025
1026 return 0;
1027 }
1028
1029 static int ov772x_set_params(struct ov772x_priv *priv,
1030 const struct ov772x_color_format *cfmt,
1031 const struct ov772x_win_size *win)
1032 {
1033 int ret;
1034 u8 val;
1035
1036 /* Reset hardware. */
1037 ov772x_reset(priv);
1038
1039 /* Edge Ctrl. */
1040 ret = ov772x_edgectrl(priv);
1041 if (ret < 0)
1042 return ret;
1043
1044 /* Format and window size. */
1045 ret = regmap_write(priv->regmap, HSTART, win->rect.left >> 2);
1046 if (ret < 0)
1047 goto ov772x_set_fmt_error;
1048 ret = regmap_write(priv->regmap, HSIZE, win->rect.width >> 2);
1049 if (ret < 0)
1050 goto ov772x_set_fmt_error;
1051 ret = regmap_write(priv->regmap, VSTART, win->rect.top >> 1);
1052 if (ret < 0)
1053 goto ov772x_set_fmt_error;
1054 ret = regmap_write(priv->regmap, VSIZE, win->rect.height >> 1);
1055 if (ret < 0)
1056 goto ov772x_set_fmt_error;
1057 ret = regmap_write(priv->regmap, HOUTSIZE, win->rect.width >> 2);
1058 if (ret < 0)
1059 goto ov772x_set_fmt_error;
1060 ret = regmap_write(priv->regmap, VOUTSIZE, win->rect.height >> 1);
1061 if (ret < 0)
1062 goto ov772x_set_fmt_error;
1063 ret = regmap_write(priv->regmap, HREF,
1064 ((win->rect.top & 1) << HREF_VSTART_SHIFT) |
1065 ((win->rect.left & 3) << HREF_HSTART_SHIFT) |
1066 ((win->rect.height & 1) << HREF_VSIZE_SHIFT) |
1067 ((win->rect.width & 3) << HREF_HSIZE_SHIFT));
1068 if (ret < 0)
1069 goto ov772x_set_fmt_error;
1070 ret = regmap_write(priv->regmap, EXHCH,
1071 ((win->rect.height & 1) << EXHCH_VSIZE_SHIFT) |
1072 ((win->rect.width & 3) << EXHCH_HSIZE_SHIFT));
1073 if (ret < 0)
1074 goto ov772x_set_fmt_error;
1075
1076 /* Set DSP_CTRL3. */
1077 val = cfmt->dsp3;
1078 if (val) {
1079 ret = regmap_update_bits(priv->regmap, DSP_CTRL3, UV_MASK, val);
1080 if (ret < 0)
1081 goto ov772x_set_fmt_error;
1082 }
1083
1084 /* DSP_CTRL4: AEC reference point and DSP output format. */
1085 if (cfmt->dsp4) {
1086 ret = regmap_write(priv->regmap, DSP_CTRL4, cfmt->dsp4);
1087 if (ret < 0)
1088 goto ov772x_set_fmt_error;
1089 }
1090
1091 /* Set COM3. */
1092 val = cfmt->com3;
1093 if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
1094 val |= VFLIP_IMG;
1095 if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
1096 val |= HFLIP_IMG;
1097 if (priv->vflip_ctrl->val)
1098 val ^= VFLIP_IMG;
1099 if (priv->hflip_ctrl->val)
1100 val ^= HFLIP_IMG;
1101
1102 ret = regmap_update_bits(priv->regmap, COM3, SWAP_MASK | IMG_MASK, val);
1103 if (ret < 0)
1104 goto ov772x_set_fmt_error;
1105
1106 /* COM7: Sensor resolution and output format control. */
1107 ret = regmap_write(priv->regmap, COM7, win->com7_bit | cfmt->com7);
1108 if (ret < 0)
1109 goto ov772x_set_fmt_error;
1110
1111 /* COM4, CLKRC: Set pixel clock and framerate. */
1112 ret = ov772x_set_frame_rate(priv, priv->fps, cfmt, win);
1113 if (ret < 0)
1114 goto ov772x_set_fmt_error;
1115
1116 /* Set COM8. */
1117 if (priv->band_filter_ctrl->val) {
1118 unsigned short band_filter = priv->band_filter_ctrl->val;
1119
1120 ret = regmap_update_bits(priv->regmap, COM8,
1121 BNDF_ON_OFF, BNDF_ON_OFF);
1122 if (!ret)
1123 ret = regmap_update_bits(priv->regmap, BDBASE,
1124 0xff, 256 - band_filter);
1125 if (ret < 0)
1126 goto ov772x_set_fmt_error;
1127 }
1128
1129 return ret;
1130
1131 ov772x_set_fmt_error:
1132
1133 ov772x_reset(priv);
1134
1135 return ret;
1136 }
1137
1138 static int ov772x_get_selection(struct v4l2_subdev *sd,
1139 struct v4l2_subdev_pad_config *cfg,
1140 struct v4l2_subdev_selection *sel)
1141 {
1142 struct ov772x_priv *priv = to_ov772x(sd);
1143
1144 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
1145 return -EINVAL;
1146
1147 sel->r.left = 0;
1148 sel->r.top = 0;
1149 switch (sel->target) {
1150 case V4L2_SEL_TGT_CROP_BOUNDS:
1151 case V4L2_SEL_TGT_CROP:
1152 sel->r.width = priv->win->rect.width;
1153 sel->r.height = priv->win->rect.height;
1154 return 0;
1155 default:
1156 return -EINVAL;
1157 }
1158 }
1159
1160 static int ov772x_get_fmt(struct v4l2_subdev *sd,
1161 struct v4l2_subdev_pad_config *cfg,
1162 struct v4l2_subdev_format *format)
1163 {
1164 struct v4l2_mbus_framefmt *mf = &format->format;
1165 struct ov772x_priv *priv = to_ov772x(sd);
1166
1167 if (format->pad)
1168 return -EINVAL;
1169
1170 mf->width = priv->win->rect.width;
1171 mf->height = priv->win->rect.height;
1172 mf->code = priv->cfmt->code;
1173 mf->colorspace = priv->cfmt->colorspace;
1174 mf->field = V4L2_FIELD_NONE;
1175
1176 return 0;
1177 }
1178
1179 static int ov772x_set_fmt(struct v4l2_subdev *sd,
1180 struct v4l2_subdev_pad_config *cfg,
1181 struct v4l2_subdev_format *format)
1182 {
1183 struct ov772x_priv *priv = to_ov772x(sd);
1184 struct v4l2_mbus_framefmt *mf = &format->format;
1185 const struct ov772x_color_format *cfmt;
1186 const struct ov772x_win_size *win;
1187 int ret = 0;
1188
1189 if (format->pad)
1190 return -EINVAL;
1191
1192 ov772x_select_params(mf, &cfmt, &win);
1193
1194 mf->code = cfmt->code;
1195 mf->width = win->rect.width;
1196 mf->height = win->rect.height;
1197 mf->field = V4L2_FIELD_NONE;
1198 mf->colorspace = cfmt->colorspace;
1199 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
1200 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
1201 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
1202
1203 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1204 cfg->try_fmt = *mf;
1205 return 0;
1206 }
1207
1208 mutex_lock(&priv->lock);
1209
1210 if (priv->streaming) {
1211 ret = -EBUSY;
1212 goto error;
1213 }
1214
1215 /*
1216 * If the device is not powered up by the host driver do
1217 * not apply any changes to H/W at this time. Instead
1218 * the format will be restored right after power-up.
1219 */
1220 if (priv->power_count > 0) {
1221 ret = ov772x_set_params(priv, cfmt, win);
1222 if (ret < 0)
1223 goto error;
1224 }
1225 priv->win = win;
1226 priv->cfmt = cfmt;
1227
1228 error:
1229 mutex_unlock(&priv->lock);
1230
1231 return ret;
1232 }
1233
1234 static int ov772x_video_probe(struct ov772x_priv *priv)
1235 {
1236 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
1237 int pid, ver, midh, midl;
1238 const char *devname;
1239 int ret;
1240
1241 ret = ov772x_power_on(priv);
1242 if (ret < 0)
1243 return ret;
1244
1245 /* Check and show product ID and manufacturer ID. */
1246 ret = regmap_read(priv->regmap, PID, &pid);
1247 if (ret < 0)
1248 return ret;
1249 ret = regmap_read(priv->regmap, VER, &ver);
1250 if (ret < 0)
1251 return ret;
1252
1253 switch (VERSION(pid, ver)) {
1254 case OV7720:
1255 devname = "ov7720";
1256 break;
1257 case OV7725:
1258 devname = "ov7725";
1259 break;
1260 default:
1261 dev_err(&client->dev,
1262 "Product ID error %x:%x\n", pid, ver);
1263 ret = -ENODEV;
1264 goto done;
1265 }
1266
1267 ret = regmap_read(priv->regmap, MIDH, &midh);
1268 if (ret < 0)
1269 return ret;
1270 ret = regmap_read(priv->regmap, MIDL, &midl);
1271 if (ret < 0)
1272 return ret;
1273
1274 dev_info(&client->dev,
1275 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
1276 devname, pid, ver, midh, midl);
1277
1278 ret = v4l2_ctrl_handler_setup(&priv->hdl);
1279
1280 done:
1281 ov772x_power_off(priv);
1282
1283 return ret;
1284 }
1285
1286 static const struct v4l2_ctrl_ops ov772x_ctrl_ops = {
1287 .s_ctrl = ov772x_s_ctrl,
1288 };
1289
1290 static const struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
1291 .log_status = v4l2_ctrl_subdev_log_status,
1292 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1293 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1294 #ifdef CONFIG_VIDEO_ADV_DEBUG
1295 .g_register = ov772x_g_register,
1296 .s_register = ov772x_s_register,
1297 #endif
1298 .s_power = ov772x_s_power,
1299 };
1300
1301 static int ov772x_enum_frame_interval(struct v4l2_subdev *sd,
1302 struct v4l2_subdev_pad_config *cfg,
1303 struct v4l2_subdev_frame_interval_enum *fie)
1304 {
1305 if (fie->pad || fie->index >= ARRAY_SIZE(ov772x_frame_intervals))
1306 return -EINVAL;
1307
1308 if (fie->width != VGA_WIDTH && fie->width != QVGA_WIDTH)
1309 return -EINVAL;
1310 if (fie->height != VGA_HEIGHT && fie->height != QVGA_HEIGHT)
1311 return -EINVAL;
1312
1313 fie->interval.numerator = 1;
1314 fie->interval.denominator = ov772x_frame_intervals[fie->index];
1315
1316 return 0;
1317 }
1318
1319 static int ov772x_enum_mbus_code(struct v4l2_subdev *sd,
1320 struct v4l2_subdev_pad_config *cfg,
1321 struct v4l2_subdev_mbus_code_enum *code)
1322 {
1323 if (code->pad || code->index >= ARRAY_SIZE(ov772x_cfmts))
1324 return -EINVAL;
1325
1326 code->code = ov772x_cfmts[code->index].code;
1327
1328 return 0;
1329 }
1330
1331 static const struct v4l2_subdev_video_ops ov772x_subdev_video_ops = {
1332 .s_stream = ov772x_s_stream,
1333 .s_frame_interval = ov772x_s_frame_interval,
1334 .g_frame_interval = ov772x_g_frame_interval,
1335 };
1336
1337 static const struct v4l2_subdev_pad_ops ov772x_subdev_pad_ops = {
1338 .enum_frame_interval = ov772x_enum_frame_interval,
1339 .enum_mbus_code = ov772x_enum_mbus_code,
1340 .get_selection = ov772x_get_selection,
1341 .get_fmt = ov772x_get_fmt,
1342 .set_fmt = ov772x_set_fmt,
1343 };
1344
1345 static const struct v4l2_subdev_ops ov772x_subdev_ops = {
1346 .core = &ov772x_subdev_core_ops,
1347 .video = &ov772x_subdev_video_ops,
1348 .pad = &ov772x_subdev_pad_ops,
1349 };
1350
1351 /*
1352 * i2c_driver function
1353 */
1354
1355 static int ov772x_probe(struct i2c_client *client)
1356 {
1357 struct ov772x_priv *priv;
1358 int ret;
1359 static const struct regmap_config ov772x_regmap_config = {
1360 .reg_bits = 8,
1361 .val_bits = 8,
1362 .max_register = DSPAUTO,
1363 };
1364
1365 if (!client->dev.of_node && !client->dev.platform_data) {
1366 dev_err(&client->dev,
1367 "Missing ov772x platform data for non-DT device\n");
1368 return -EINVAL;
1369 }
1370
1371 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1372 if (!priv)
1373 return -ENOMEM;
1374
1375 priv->regmap = devm_regmap_init_sccb(client, &ov772x_regmap_config);
1376 if (IS_ERR(priv->regmap)) {
1377 dev_err(&client->dev, "Failed to allocate register map\n");
1378 return PTR_ERR(priv->regmap);
1379 }
1380
1381 priv->info = client->dev.platform_data;
1382 mutex_init(&priv->lock);
1383
1384 v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
1385 priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1386 V4L2_SUBDEV_FL_HAS_EVENTS;
1387 v4l2_ctrl_handler_init(&priv->hdl, 3);
1388 /* Use our mutex for the controls */
1389 priv->hdl.lock = &priv->lock;
1390 priv->vflip_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1391 V4L2_CID_VFLIP, 0, 1, 1, 0);
1392 priv->hflip_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1393 V4L2_CID_HFLIP, 0, 1, 1, 0);
1394 priv->band_filter_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1395 V4L2_CID_BAND_STOP_FILTER,
1396 0, 256, 1, 0);
1397 priv->subdev.ctrl_handler = &priv->hdl;
1398 if (priv->hdl.error) {
1399 ret = priv->hdl.error;
1400 goto error_mutex_destroy;
1401 }
1402
1403 priv->clk = clk_get(&client->dev, NULL);
1404 if (IS_ERR(priv->clk)) {
1405 dev_err(&client->dev, "Unable to get xclk clock\n");
1406 ret = PTR_ERR(priv->clk);
1407 goto error_ctrl_free;
1408 }
1409
1410 priv->pwdn_gpio = gpiod_get_optional(&client->dev, "powerdown",
1411 GPIOD_OUT_LOW);
1412 if (IS_ERR(priv->pwdn_gpio)) {
1413 dev_info(&client->dev, "Unable to get GPIO \"powerdown\"");
1414 ret = PTR_ERR(priv->pwdn_gpio);
1415 goto error_clk_put;
1416 }
1417
1418 ret = ov772x_video_probe(priv);
1419 if (ret < 0)
1420 goto error_gpio_put;
1421
1422 #ifdef CONFIG_MEDIA_CONTROLLER
1423 priv->pad.flags = MEDIA_PAD_FL_SOURCE;
1424 priv->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1425 ret = media_entity_pads_init(&priv->subdev.entity, 1, &priv->pad);
1426 if (ret < 0)
1427 goto error_gpio_put;
1428 #endif
1429
1430 priv->cfmt = &ov772x_cfmts[0];
1431 priv->win = &ov772x_win_sizes[0];
1432 priv->fps = 15;
1433
1434 ret = v4l2_async_register_subdev(&priv->subdev);
1435 if (ret)
1436 goto error_entity_cleanup;
1437
1438 return 0;
1439
1440 error_entity_cleanup:
1441 media_entity_cleanup(&priv->subdev.entity);
1442 error_gpio_put:
1443 if (priv->pwdn_gpio)
1444 gpiod_put(priv->pwdn_gpio);
1445 error_clk_put:
1446 clk_put(priv->clk);
1447 error_ctrl_free:
1448 v4l2_ctrl_handler_free(&priv->hdl);
1449 error_mutex_destroy:
1450 mutex_destroy(&priv->lock);
1451
1452 return ret;
1453 }
1454
1455 static int ov772x_remove(struct i2c_client *client)
1456 {
1457 struct ov772x_priv *priv = to_ov772x(i2c_get_clientdata(client));
1458
1459 media_entity_cleanup(&priv->subdev.entity);
1460 clk_put(priv->clk);
1461 if (priv->pwdn_gpio)
1462 gpiod_put(priv->pwdn_gpio);
1463 v4l2_async_unregister_subdev(&priv->subdev);
1464 v4l2_ctrl_handler_free(&priv->hdl);
1465 mutex_destroy(&priv->lock);
1466
1467 return 0;
1468 }
1469
1470 static const struct i2c_device_id ov772x_id[] = {
1471 { "ov772x", 0 },
1472 { }
1473 };
1474 MODULE_DEVICE_TABLE(i2c, ov772x_id);
1475
1476 static const struct of_device_id ov772x_of_match[] = {
1477 { .compatible = "ovti,ov7725", },
1478 { .compatible = "ovti,ov7720", },
1479 { /* sentinel */ },
1480 };
1481 MODULE_DEVICE_TABLE(of, ov772x_of_match);
1482
1483 static struct i2c_driver ov772x_i2c_driver = {
1484 .driver = {
1485 .name = "ov772x",
1486 .of_match_table = ov772x_of_match,
1487 },
1488 .probe_new = ov772x_probe,
1489 .remove = ov772x_remove,
1490 .id_table = ov772x_id,
1491 };
1492
1493 module_i2c_driver(ov772x_i2c_driver);
1494
1495 MODULE_DESCRIPTION("V4L2 driver for OV772x image sensor");
1496 MODULE_AUTHOR("Kuninori Morimoto");
1497 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support