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ALSA: dice: fix kernel NULL pointer dereference due to invalid calculation for array...
[linux/fpc-iii.git] / drivers / media / i2c / soc_camera / ov772x.c
blob806383500313e029bcf9bbb14cdbac0f55fcefff
1 /*
2 * ov772x Camera Driver
3 *
4 * Copyright (C) 2008 Renesas Solutions Corp.
5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
6 *
7 * Based on ov7670 and soc_camera_platform driver,
8 *
9 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
10 * Copyright (C) 2008 Magnus Damm
11 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/i2c.h>
22 #include <linux/slab.h>
23 #include <linux/delay.h>
24 #include <linux/v4l2-mediabus.h>
25 #include <linux/videodev2.h>
26
27 #include <media/i2c/ov772x.h>
28 #include <media/soc_camera.h>
29 #include <media/v4l2-clk.h>
30 #include <media/v4l2-ctrls.h>
31 #include <media/v4l2-subdev.h>
32 #include <media/v4l2-image-sizes.h>
33
34 /*
35 * register offset
36 */
37 #define GAIN 0x00 /* AGC - Gain control gain setting */
38 #define BLUE 0x01 /* AWB - Blue channel gain setting */
39 #define RED 0x02 /* AWB - Red channel gain setting */
40 #define GREEN 0x03 /* AWB - Green channel gain setting */
41 #define COM1 0x04 /* Common control 1 */
42 #define BAVG 0x05 /* U/B Average Level */
43 #define GAVG 0x06 /* Y/Gb Average Level */
44 #define RAVG 0x07 /* V/R Average Level */
45 #define AECH 0x08 /* Exposure Value - AEC MSBs */
46 #define COM2 0x09 /* Common control 2 */
47 #define PID 0x0A /* Product ID Number MSB */
48 #define VER 0x0B /* Product ID Number LSB */
49 #define COM3 0x0C /* Common control 3 */
50 #define COM4 0x0D /* Common control 4 */
51 #define COM5 0x0E /* Common control 5 */
52 #define COM6 0x0F /* Common control 6 */
53 #define AEC 0x10 /* Exposure Value */
54 #define CLKRC 0x11 /* Internal clock */
55 #define COM7 0x12 /* Common control 7 */
56 #define COM8 0x13 /* Common control 8 */
57 #define COM9 0x14 /* Common control 9 */
58 #define COM10 0x15 /* Common control 10 */
59 #define REG16 0x16 /* Register 16 */
60 #define HSTART 0x17 /* Horizontal sensor size */
61 #define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
62 #define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
63 #define VSIZE 0x1A /* Vertical sensor size */
64 #define PSHFT 0x1B /* Data format - pixel delay select */
65 #define MIDH 0x1C /* Manufacturer ID byte - high */
66 #define MIDL 0x1D /* Manufacturer ID byte - low */
67 #define LAEC 0x1F /* Fine AEC value */
68 #define COM11 0x20 /* Common control 11 */
69 #define BDBASE 0x22 /* Banding filter Minimum AEC value */
70 #define DBSTEP 0x23 /* Banding filter Maximum Setp */
71 #define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
72 #define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
73 #define VPT 0x26 /* AGC/AEC Fast mode operating region */
74 #define REG28 0x28 /* Register 28 */
75 #define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
76 #define EXHCH 0x2A /* Dummy pixel insert MSB */
77 #define EXHCL 0x2B /* Dummy pixel insert LSB */
78 #define VOUTSIZE 0x2C /* Vertical data output size MSBs */
79 #define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
80 #define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
81 #define YAVE 0x2F /* Y/G Channel Average value */
82 #define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
83 #define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
84 #define HREF 0x32 /* Image start and size control */
85 #define DM_LNL 0x33 /* Dummy line low 8 bits */
86 #define DM_LNH 0x34 /* Dummy line high 8 bits */
87 #define ADOFF_B 0x35 /* AD offset compensation value for B channel */
88 #define ADOFF_R 0x36 /* AD offset compensation value for R channel */
89 #define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
90 #define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
91 #define OFF_B 0x39 /* Analog process B channel offset value */
92 #define OFF_R 0x3A /* Analog process R channel offset value */
93 #define OFF_GB 0x3B /* Analog process Gb channel offset value */
94 #define OFF_GR 0x3C /* Analog process Gr channel offset value */
95 #define COM12 0x3D /* Common control 12 */
96 #define COM13 0x3E /* Common control 13 */
97 #define COM14 0x3F /* Common control 14 */
98 #define COM15 0x40 /* Common control 15*/
99 #define COM16 0x41 /* Common control 16 */
100 #define TGT_B 0x42 /* BLC blue channel target value */
101 #define TGT_R 0x43 /* BLC red channel target value */
102 #define TGT_GB 0x44 /* BLC Gb channel target value */
103 #define TGT_GR 0x45 /* BLC Gr channel target value */
104 /* for ov7720 */
105 #define LCC0 0x46 /* Lens correction control 0 */
106 #define LCC1 0x47 /* Lens correction option 1 - X coordinate */
107 #define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
108 #define LCC3 0x49 /* Lens correction option 3 */
109 #define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
110 #define LCC5 0x4B /* Lens correction option 5 */
111 #define LCC6 0x4C /* Lens correction option 6 */
112 /* for ov7725 */
113 #define LC_CTR 0x46 /* Lens correction control */
114 #define LC_XC 0x47 /* X coordinate of lens correction center relative */
115 #define LC_YC 0x48 /* Y coordinate of lens correction center relative */
116 #define LC_COEF 0x49 /* Lens correction coefficient */
117 #define LC_RADI 0x4A /* Lens correction radius */
118 #define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
119 #define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
120
121 #define FIXGAIN 0x4D /* Analog fix gain amplifer */
122 #define AREF0 0x4E /* Sensor reference control */
123 #define AREF1 0x4F /* Sensor reference current control */
124 #define AREF2 0x50 /* Analog reference control */
125 #define AREF3 0x51 /* ADC reference control */
126 #define AREF4 0x52 /* ADC reference control */
127 #define AREF5 0x53 /* ADC reference control */
128 #define AREF6 0x54 /* Analog reference control */
129 #define AREF7 0x55 /* Analog reference control */
130 #define UFIX 0x60 /* U channel fixed value output */
131 #define VFIX 0x61 /* V channel fixed value output */
132 #define AWBB_BLK 0x62 /* AWB option for advanced AWB */
133 #define AWB_CTRL0 0x63 /* AWB control byte 0 */
134 #define DSP_CTRL1 0x64 /* DSP control byte 1 */
135 #define DSP_CTRL2 0x65 /* DSP control byte 2 */
136 #define DSP_CTRL3 0x66 /* DSP control byte 3 */
137 #define DSP_CTRL4 0x67 /* DSP control byte 4 */
138 #define AWB_BIAS 0x68 /* AWB BLC level clip */
139 #define AWB_CTRL1 0x69 /* AWB control 1 */
140 #define AWB_CTRL2 0x6A /* AWB control 2 */
141 #define AWB_CTRL3 0x6B /* AWB control 3 */
142 #define AWB_CTRL4 0x6C /* AWB control 4 */
143 #define AWB_CTRL5 0x6D /* AWB control 5 */
144 #define AWB_CTRL6 0x6E /* AWB control 6 */
145 #define AWB_CTRL7 0x6F /* AWB control 7 */
146 #define AWB_CTRL8 0x70 /* AWB control 8 */
147 #define AWB_CTRL9 0x71 /* AWB control 9 */
148 #define AWB_CTRL10 0x72 /* AWB control 10 */
149 #define AWB_CTRL11 0x73 /* AWB control 11 */
150 #define AWB_CTRL12 0x74 /* AWB control 12 */
151 #define AWB_CTRL13 0x75 /* AWB control 13 */
152 #define AWB_CTRL14 0x76 /* AWB control 14 */
153 #define AWB_CTRL15 0x77 /* AWB control 15 */
154 #define AWB_CTRL16 0x78 /* AWB control 16 */
155 #define AWB_CTRL17 0x79 /* AWB control 17 */
156 #define AWB_CTRL18 0x7A /* AWB control 18 */
157 #define AWB_CTRL19 0x7B /* AWB control 19 */
158 #define AWB_CTRL20 0x7C /* AWB control 20 */
159 #define AWB_CTRL21 0x7D /* AWB control 21 */
160 #define GAM1 0x7E /* Gamma Curve 1st segment input end point */
161 #define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
162 #define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
163 #define GAM4 0x81 /* Gamma Curve 4th segment input end point */
164 #define GAM5 0x82 /* Gamma Curve 5th segment input end point */
165 #define GAM6 0x83 /* Gamma Curve 6th segment input end point */
166 #define GAM7 0x84 /* Gamma Curve 7th segment input end point */
167 #define GAM8 0x85 /* Gamma Curve 8th segment input end point */
168 #define GAM9 0x86 /* Gamma Curve 9th segment input end point */
169 #define GAM10 0x87 /* Gamma Curve 10th segment input end point */
170 #define GAM11 0x88 /* Gamma Curve 11th segment input end point */
171 #define GAM12 0x89 /* Gamma Curve 12th segment input end point */
172 #define GAM13 0x8A /* Gamma Curve 13th segment input end point */
173 #define GAM14 0x8B /* Gamma Curve 14th segment input end point */
174 #define GAM15 0x8C /* Gamma Curve 15th segment input end point */
175 #define SLOP 0x8D /* Gamma curve highest segment slope */
176 #define DNSTH 0x8E /* De-noise threshold */
177 #define EDGE_STRNGT 0x8F /* Edge strength control when manual mode */
178 #define EDGE_TRSHLD 0x90 /* Edge threshold control when manual mode */
179 #define DNSOFF 0x91 /* Auto De-noise threshold control */
180 #define EDGE_UPPER 0x92 /* Edge strength upper limit when Auto mode */
181 #define EDGE_LOWER 0x93 /* Edge strength lower limit when Auto mode */
182 #define MTX1 0x94 /* Matrix coefficient 1 */
183 #define MTX2 0x95 /* Matrix coefficient 2 */
184 #define MTX3 0x96 /* Matrix coefficient 3 */
185 #define MTX4 0x97 /* Matrix coefficient 4 */
186 #define MTX5 0x98 /* Matrix coefficient 5 */
187 #define MTX6 0x99 /* Matrix coefficient 6 */
188 #define MTX_CTRL 0x9A /* Matrix control */
189 #define BRIGHT 0x9B /* Brightness control */
190 #define CNTRST 0x9C /* Contrast contrast */
191 #define CNTRST_CTRL 0x9D /* Contrast contrast center */
192 #define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
193 #define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
194 #define SCAL0 0xA0 /* Scaling control 0 */
195 #define SCAL1 0xA1 /* Scaling control 1 */
196 #define SCAL2 0xA2 /* Scaling control 2 */
197 #define FIFODLYM 0xA3 /* FIFO manual mode delay control */
198 #define FIFODLYA 0xA4 /* FIFO auto mode delay control */
199 #define SDE 0xA6 /* Special digital effect control */
200 #define USAT 0xA7 /* U component saturation control */
201 #define VSAT 0xA8 /* V component saturation control */
202 /* for ov7720 */
203 #define HUE0 0xA9 /* Hue control 0 */
204 #define HUE1 0xAA /* Hue control 1 */
205 /* for ov7725 */
206 #define HUECOS 0xA9 /* Cosine value */
207 #define HUESIN 0xAA /* Sine value */
208
209 #define SIGN 0xAB /* Sign bit for Hue and contrast */
210 #define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
211
212 /*
213 * register detail
214 */
215
216 /* COM2 */
217 #define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
218 /* Output drive capability */
219 #define OCAP_1x 0x00 /* 1x */
220 #define OCAP_2x 0x01 /* 2x */
221 #define OCAP_3x 0x02 /* 3x */
222 #define OCAP_4x 0x03 /* 4x */
223
224 /* COM3 */
225 #define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
226 #define IMG_MASK (VFLIP_IMG | HFLIP_IMG)
227
228 #define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
229 #define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
230 #define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
231 #define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
232 #define SWAP_ML 0x08 /* Swap output MSB/LSB */
233 /* Tri-state option for output clock */
234 #define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
235 /* 1: No tri-state at this period */
236 /* Tri-state option for output data */
237 #define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
238 /* 1: No tri-state at this period */
239 #define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
240
241 /* COM4 */
242 /* PLL frequency control */
243 #define PLL_BYPASS 0x00 /* 00: Bypass PLL */
244 #define PLL_4x 0x40 /* 01: PLL 4x */
245 #define PLL_6x 0x80 /* 10: PLL 6x */
246 #define PLL_8x 0xc0 /* 11: PLL 8x */
247 /* AEC evaluate window */
248 #define AEC_FULL 0x00 /* 00: Full window */
249 #define AEC_1p2 0x10 /* 01: 1/2 window */
250 #define AEC_1p4 0x20 /* 10: 1/4 window */
251 #define AEC_2p3 0x30 /* 11: Low 2/3 window */
252
253 /* COM5 */
254 #define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
255 #define AFR_SPPED 0x40 /* Auto frame rate control speed selection */
256 /* Auto frame rate max rate control */
257 #define AFR_NO_RATE 0x00 /* No reduction of frame rate */
258 #define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
259 #define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
260 #define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
261 /* Auto frame rate active point control */
262 #define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
263 #define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
264 #define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
265 #define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
266 /* AEC max step control */
267 #define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
268 /* 1 : No limit to AEC increase step */
269
270 /* COM7 */
271 /* SCCB Register Reset */
272 #define SCCB_RESET 0x80 /* 0 : No change */
273 /* 1 : Resets all registers to default */
274 /* Resolution selection */
275 #define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
276 #define SLCT_VGA 0x00 /* 0 : VGA */
277 #define SLCT_QVGA 0x40 /* 1 : QVGA */
278 #define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
279 #define SENSOR_RAW 0x10 /* Sensor RAW */
280 /* RGB output format control */
281 #define FMT_MASK 0x0c /* Mask of color format */
282 #define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
283 #define FMT_RGB565 0x04 /* 01 : RGB 565 */
284 #define FMT_RGB555 0x08 /* 10 : RGB 555 */
285 #define FMT_RGB444 0x0c /* 11 : RGB 444 */
286 /* Output format control */
287 #define OFMT_MASK 0x03 /* Mask of output format */
288 #define OFMT_YUV 0x00 /* 00 : YUV */
289 #define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
290 #define OFMT_RGB 0x02 /* 10 : RGB */
291 #define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
292
293 /* COM8 */
294 #define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
295 /* AEC Setp size limit */
296 #define UNLMT_STEP 0x40 /* 0 : Step size is limited */
297 /* 1 : Unlimited step size */
298 #define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
299 #define AEC_BND 0x10 /* Enable AEC below banding value */
300 #define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
301 #define AGC_ON 0x04 /* AGC Enable */
302 #define AWB_ON 0x02 /* AWB Enable */
303 #define AEC_ON 0x01 /* AEC Enable */
304
305 /* COM9 */
306 #define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
307 /* Automatic gain ceiling - maximum AGC value */
308 #define GAIN_2x 0x00 /* 000 : 2x */
309 #define GAIN_4x 0x10 /* 001 : 4x */
310 #define GAIN_8x 0x20 /* 010 : 8x */
311 #define GAIN_16x 0x30 /* 011 : 16x */
312 #define GAIN_32x 0x40 /* 100 : 32x */
313 #define GAIN_64x 0x50 /* 101 : 64x */
314 #define GAIN_128x 0x60 /* 110 : 128x */
315 #define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
316 #define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
317
318 /* COM11 */
319 #define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
320 #define SGLF_TRIG 0x01 /* Single frame transfer trigger */
321
322 /* HREF */
323 #define HREF_VSTART_SHIFT 6 /* VSTART LSB */
324 #define HREF_HSTART_SHIFT 4 /* HSTART 2 LSBs */
325 #define HREF_VSIZE_SHIFT 2 /* VSIZE LSB */
326 #define HREF_HSIZE_SHIFT 0 /* HSIZE 2 LSBs */
327
328 /* EXHCH */
329 #define EXHCH_VSIZE_SHIFT 2 /* VOUTSIZE LSB */
330 #define EXHCH_HSIZE_SHIFT 0 /* HOUTSIZE 2 LSBs */
331
332 /* DSP_CTRL1 */
333 #define FIFO_ON 0x80 /* FIFO enable/disable selection */
334 #define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
335 #define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
336 #define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
337 #define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
338 #define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
339 #define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
340 #define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
341
342 /* DSP_CTRL3 */
343 #define UV_MASK 0x80 /* UV output sequence option */
344 #define UV_ON 0x80 /* ON */
345 #define UV_OFF 0x00 /* OFF */
346 #define CBAR_MASK 0x20 /* DSP Color bar mask */
347 #define CBAR_ON 0x20 /* ON */
348 #define CBAR_OFF 0x00 /* OFF */
349
350 /* DSP_CTRL4 */
351 #define DSP_OFMT_YUV 0x00
352 #define DSP_OFMT_RGB 0x00
353 #define DSP_OFMT_RAW8 0x02
354 #define DSP_OFMT_RAW10 0x03
355
356 /* DSPAUTO (DSP Auto Function ON/OFF Control) */
357 #define AWB_ACTRL 0x80 /* AWB auto threshold control */
358 #define DENOISE_ACTRL 0x40 /* De-noise auto threshold control */
359 #define EDGE_ACTRL 0x20 /* Edge enhancement auto strength control */
360 #define UV_ACTRL 0x10 /* UV adjust auto slope control */
361 #define SCAL0_ACTRL 0x08 /* Auto scaling factor control */
362 #define SCAL1_2_ACTRL 0x04 /* Auto scaling factor control */
363
364 #define OV772X_MAX_WIDTH VGA_WIDTH
365 #define OV772X_MAX_HEIGHT VGA_HEIGHT
366
367 /*
368 * ID
369 */
370 #define OV7720 0x7720
371 #define OV7725 0x7721
372 #define VERSION(pid, ver) ((pid<<8)|(ver&0xFF))
373
374 /*
375 * struct
376 */
377
378 struct ov772x_color_format {
379 u32 code;
380 enum v4l2_colorspace colorspace;
381 u8 dsp3;
382 u8 dsp4;
383 u8 com3;
384 u8 com7;
385 };
386
387 struct ov772x_win_size {
388 char *name;
389 unsigned char com7_bit;
390 struct v4l2_rect rect;
391 };
392
393 struct ov772x_priv {
394 struct v4l2_subdev subdev;
395 struct v4l2_ctrl_handler hdl;
396 struct v4l2_clk *clk;
397 struct ov772x_camera_info *info;
398 const struct ov772x_color_format *cfmt;
399 const struct ov772x_win_size *win;
400 unsigned short flag_vflip:1;
401 unsigned short flag_hflip:1;
402 /* band_filter = COM8[5] ? 256 - BDBASE : 0 */
403 unsigned short band_filter;
404 };
405
406 /*
407 * supported color format list
408 */
409 static const struct ov772x_color_format ov772x_cfmts[] = {
410 {
411 .code = MEDIA_BUS_FMT_YUYV8_2X8,
412 .colorspace = V4L2_COLORSPACE_JPEG,
413 .dsp3 = 0x0,
414 .dsp4 = DSP_OFMT_YUV,
415 .com3 = SWAP_YUV,
416 .com7 = OFMT_YUV,
417 },
418 {
419 .code = MEDIA_BUS_FMT_YVYU8_2X8,
420 .colorspace = V4L2_COLORSPACE_JPEG,
421 .dsp3 = UV_ON,
422 .dsp4 = DSP_OFMT_YUV,
423 .com3 = SWAP_YUV,
424 .com7 = OFMT_YUV,
425 },
426 {
427 .code = MEDIA_BUS_FMT_UYVY8_2X8,
428 .colorspace = V4L2_COLORSPACE_JPEG,
429 .dsp3 = 0x0,
430 .dsp4 = DSP_OFMT_YUV,
431 .com3 = 0x0,
432 .com7 = OFMT_YUV,
433 },
434 {
435 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
436 .colorspace = V4L2_COLORSPACE_SRGB,
437 .dsp3 = 0x0,
438 .dsp4 = DSP_OFMT_YUV,
439 .com3 = SWAP_RGB,
440 .com7 = FMT_RGB555 | OFMT_RGB,
441 },
442 {
443 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
444 .colorspace = V4L2_COLORSPACE_SRGB,
445 .dsp3 = 0x0,
446 .dsp4 = DSP_OFMT_YUV,
447 .com3 = 0x0,
448 .com7 = FMT_RGB555 | OFMT_RGB,
449 },
450 {
451 .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
452 .colorspace = V4L2_COLORSPACE_SRGB,
453 .dsp3 = 0x0,
454 .dsp4 = DSP_OFMT_YUV,
455 .com3 = SWAP_RGB,
456 .com7 = FMT_RGB565 | OFMT_RGB,
457 },
458 {
459 .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
460 .colorspace = V4L2_COLORSPACE_SRGB,
461 .dsp3 = 0x0,
462 .dsp4 = DSP_OFMT_YUV,
463 .com3 = 0x0,
464 .com7 = FMT_RGB565 | OFMT_RGB,
465 },
466 {
467 /* Setting DSP4 to DSP_OFMT_RAW8 still gives 10-bit output,
468 * regardless of the COM7 value. We can thus only support 10-bit
469 * Bayer until someone figures it out.
470 */
471 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
472 .colorspace = V4L2_COLORSPACE_SRGB,
473 .dsp3 = 0x0,
474 .dsp4 = DSP_OFMT_RAW10,
475 .com3 = 0x0,
476 .com7 = SENSOR_RAW | OFMT_BRAW,
477 },
478 };
479
480
481 /*
482 * window size list
483 */
484
485 static const struct ov772x_win_size ov772x_win_sizes[] = {
486 {
487 .name = "VGA",
488 .com7_bit = SLCT_VGA,
489 .rect = {
490 .left = 140,
491 .top = 14,
492 .width = VGA_WIDTH,
493 .height = VGA_HEIGHT,
494 },
495 }, {
496 .name = "QVGA",
497 .com7_bit = SLCT_QVGA,
498 .rect = {
499 .left = 252,
500 .top = 6,
501 .width = QVGA_WIDTH,
502 .height = QVGA_HEIGHT,
503 },
504 },
505 };
506
507 /*
508 * general function
509 */
510
511 static struct ov772x_priv *to_ov772x(struct v4l2_subdev *sd)
512 {
513 return container_of(sd, struct ov772x_priv, subdev);
514 }
515
516 static inline int ov772x_read(struct i2c_client *client, u8 addr)
517 {
518 return i2c_smbus_read_byte_data(client, addr);
519 }
520
521 static inline int ov772x_write(struct i2c_client *client, u8 addr, u8 value)
522 {
523 return i2c_smbus_write_byte_data(client, addr, value);
524 }
525
526 static int ov772x_mask_set(struct i2c_client *client, u8 command, u8 mask,
527 u8 set)
528 {
529 s32 val = ov772x_read(client, command);
530 if (val < 0)
531 return val;
532
533 val &= ~mask;
534 val |= set & mask;
535
536 return ov772x_write(client, command, val);
537 }
538
539 static int ov772x_reset(struct i2c_client *client)
540 {
541 int ret;
542
543 ret = ov772x_write(client, COM7, SCCB_RESET);
544 if (ret < 0)
545 return ret;
546
547 msleep(1);
548
549 return ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, SOFT_SLEEP_MODE);
550 }
551
552 /*
553 * soc_camera_ops function
554 */
555
556 static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
557 {
558 struct i2c_client *client = v4l2_get_subdevdata(sd);
559 struct ov772x_priv *priv = to_ov772x(sd);
560
561 if (!enable) {
562 ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, SOFT_SLEEP_MODE);
563 return 0;
564 }
565
566 ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, 0);
567
568 dev_dbg(&client->dev, "format %d, win %s\n",
569 priv->cfmt->code, priv->win->name);
570
571 return 0;
572 }
573
574 static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
575 {
576 struct ov772x_priv *priv = container_of(ctrl->handler,
577 struct ov772x_priv, hdl);
578 struct v4l2_subdev *sd = &priv->subdev;
579 struct i2c_client *client = v4l2_get_subdevdata(sd);
580 int ret = 0;
581 u8 val;
582
583 switch (ctrl->id) {
584 case V4L2_CID_VFLIP:
585 val = ctrl->val ? VFLIP_IMG : 0x00;
586 priv->flag_vflip = ctrl->val;
587 if (priv->info->flags & OV772X_FLAG_VFLIP)
588 val ^= VFLIP_IMG;
589 return ov772x_mask_set(client, COM3, VFLIP_IMG, val);
590 case V4L2_CID_HFLIP:
591 val = ctrl->val ? HFLIP_IMG : 0x00;
592 priv->flag_hflip = ctrl->val;
593 if (priv->info->flags & OV772X_FLAG_HFLIP)
594 val ^= HFLIP_IMG;
595 return ov772x_mask_set(client, COM3, HFLIP_IMG, val);
596 case V4L2_CID_BAND_STOP_FILTER:
597 if (!ctrl->val) {
598 /* Switch the filter off, it is on now */
599 ret = ov772x_mask_set(client, BDBASE, 0xff, 0xff);
600 if (!ret)
601 ret = ov772x_mask_set(client, COM8,
602 BNDF_ON_OFF, 0);
603 } else {
604 /* Switch the filter on, set AEC low limit */
605 val = 256 - ctrl->val;
606 ret = ov772x_mask_set(client, COM8,
607 BNDF_ON_OFF, BNDF_ON_OFF);
608 if (!ret)
609 ret = ov772x_mask_set(client, BDBASE,
610 0xff, val);
611 }
612 if (!ret)
613 priv->band_filter = ctrl->val;
614 return ret;
615 }
616
617 return -EINVAL;
618 }
619
620 #ifdef CONFIG_VIDEO_ADV_DEBUG
621 static int ov772x_g_register(struct v4l2_subdev *sd,
622 struct v4l2_dbg_register *reg)
623 {
624 struct i2c_client *client = v4l2_get_subdevdata(sd);
625 int ret;
626
627 reg->size = 1;
628 if (reg->reg > 0xff)
629 return -EINVAL;
630
631 ret = ov772x_read(client, reg->reg);
632 if (ret < 0)
633 return ret;
634
635 reg->val = (__u64)ret;
636
637 return 0;
638 }
639
640 static int ov772x_s_register(struct v4l2_subdev *sd,
641 const struct v4l2_dbg_register *reg)
642 {
643 struct i2c_client *client = v4l2_get_subdevdata(sd);
644
645 if (reg->reg > 0xff ||
646 reg->val > 0xff)
647 return -EINVAL;
648
649 return ov772x_write(client, reg->reg, reg->val);
650 }
651 #endif
652
653 static int ov772x_s_power(struct v4l2_subdev *sd, int on)
654 {
655 struct i2c_client *client = v4l2_get_subdevdata(sd);
656 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
657 struct ov772x_priv *priv = to_ov772x(sd);
658
659 return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
660 }
661
662 static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height)
663 {
664 const struct ov772x_win_size *win = &ov772x_win_sizes[0];
665 u32 best_diff = UINT_MAX;
666 unsigned int i;
667
668 for (i = 0; i < ARRAY_SIZE(ov772x_win_sizes); ++i) {
669 u32 diff = abs(width - ov772x_win_sizes[i].rect.width)
670 + abs(height - ov772x_win_sizes[i].rect.height);
671 if (diff < best_diff) {
672 best_diff = diff;
673 win = &ov772x_win_sizes[i];
674 }
675 }
676
677 return win;
678 }
679
680 static void ov772x_select_params(const struct v4l2_mbus_framefmt *mf,
681 const struct ov772x_color_format **cfmt,
682 const struct ov772x_win_size **win)
683 {
684 unsigned int i;
685
686 /* Select a format. */
687 *cfmt = &ov772x_cfmts[0];
688
689 for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
690 if (mf->code == ov772x_cfmts[i].code) {
691 *cfmt = &ov772x_cfmts[i];
692 break;
693 }
694 }
695
696 /* Select a window size. */
697 *win = ov772x_select_win(mf->width, mf->height);
698 }
699
700 static int ov772x_set_params(struct ov772x_priv *priv,
701 const struct ov772x_color_format *cfmt,
702 const struct ov772x_win_size *win)
703 {
704 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
705 int ret;
706 u8 val;
707
708 /*
709 * reset hardware
710 */
711 ov772x_reset(client);
712
713 /*
714 * Edge Ctrl
715 */
716 if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
717
718 /*
719 * Manual Edge Control Mode
720 *
721 * Edge auto strength bit is set by default.
722 * Remove it when manual mode.
723 */
724
725 ret = ov772x_mask_set(client, DSPAUTO, EDGE_ACTRL, 0x00);
726 if (ret < 0)
727 goto ov772x_set_fmt_error;
728
729 ret = ov772x_mask_set(client,
730 EDGE_TRSHLD, OV772X_EDGE_THRESHOLD_MASK,
731 priv->info->edgectrl.threshold);
732 if (ret < 0)
733 goto ov772x_set_fmt_error;
734
735 ret = ov772x_mask_set(client,
736 EDGE_STRNGT, OV772X_EDGE_STRENGTH_MASK,
737 priv->info->edgectrl.strength);
738 if (ret < 0)
739 goto ov772x_set_fmt_error;
740
741 } else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
742 /*
743 * Auto Edge Control Mode
744 *
745 * set upper and lower limit
746 */
747 ret = ov772x_mask_set(client,
748 EDGE_UPPER, OV772X_EDGE_UPPER_MASK,
749 priv->info->edgectrl.upper);
750 if (ret < 0)
751 goto ov772x_set_fmt_error;
752
753 ret = ov772x_mask_set(client,
754 EDGE_LOWER, OV772X_EDGE_LOWER_MASK,
755 priv->info->edgectrl.lower);
756 if (ret < 0)
757 goto ov772x_set_fmt_error;
758 }
759
760 /* Format and window size */
761 ret = ov772x_write(client, HSTART, win->rect.left >> 2);
762 if (ret < 0)
763 goto ov772x_set_fmt_error;
764 ret = ov772x_write(client, HSIZE, win->rect.width >> 2);
765 if (ret < 0)
766 goto ov772x_set_fmt_error;
767 ret = ov772x_write(client, VSTART, win->rect.top >> 1);
768 if (ret < 0)
769 goto ov772x_set_fmt_error;
770 ret = ov772x_write(client, VSIZE, win->rect.height >> 1);
771 if (ret < 0)
772 goto ov772x_set_fmt_error;
773 ret = ov772x_write(client, HOUTSIZE, win->rect.width >> 2);
774 if (ret < 0)
775 goto ov772x_set_fmt_error;
776 ret = ov772x_write(client, VOUTSIZE, win->rect.height >> 1);
777 if (ret < 0)
778 goto ov772x_set_fmt_error;
779 ret = ov772x_write(client, HREF,
780 ((win->rect.top & 1) << HREF_VSTART_SHIFT) |
781 ((win->rect.left & 3) << HREF_HSTART_SHIFT) |
782 ((win->rect.height & 1) << HREF_VSIZE_SHIFT) |
783 ((win->rect.width & 3) << HREF_HSIZE_SHIFT));
784 if (ret < 0)
785 goto ov772x_set_fmt_error;
786 ret = ov772x_write(client, EXHCH,
787 ((win->rect.height & 1) << EXHCH_VSIZE_SHIFT) |
788 ((win->rect.width & 3) << EXHCH_HSIZE_SHIFT));
789 if (ret < 0)
790 goto ov772x_set_fmt_error;
791
792 /*
793 * set DSP_CTRL3
794 */
795 val = cfmt->dsp3;
796 if (val) {
797 ret = ov772x_mask_set(client,
798 DSP_CTRL3, UV_MASK, val);
799 if (ret < 0)
800 goto ov772x_set_fmt_error;
801 }
802
803 /* DSP_CTRL4: AEC reference point and DSP output format. */
804 if (cfmt->dsp4) {
805 ret = ov772x_write(client, DSP_CTRL4, cfmt->dsp4);
806 if (ret < 0)
807 goto ov772x_set_fmt_error;
808 }
809
810 /*
811 * set COM3
812 */
813 val = cfmt->com3;
814 if (priv->info->flags & OV772X_FLAG_VFLIP)
815 val |= VFLIP_IMG;
816 if (priv->info->flags & OV772X_FLAG_HFLIP)
817 val |= HFLIP_IMG;
818 if (priv->flag_vflip)
819 val ^= VFLIP_IMG;
820 if (priv->flag_hflip)
821 val ^= HFLIP_IMG;
822
823 ret = ov772x_mask_set(client,
824 COM3, SWAP_MASK | IMG_MASK, val);
825 if (ret < 0)
826 goto ov772x_set_fmt_error;
827
828 /* COM7: Sensor resolution and output format control. */
829 ret = ov772x_write(client, COM7, win->com7_bit | cfmt->com7);
830 if (ret < 0)
831 goto ov772x_set_fmt_error;
832
833 /*
834 * set COM8
835 */
836 if (priv->band_filter) {
837 ret = ov772x_mask_set(client, COM8, BNDF_ON_OFF, 1);
838 if (!ret)
839 ret = ov772x_mask_set(client, BDBASE,
840 0xff, 256 - priv->band_filter);
841 if (ret < 0)
842 goto ov772x_set_fmt_error;
843 }
844
845 return ret;
846
847 ov772x_set_fmt_error:
848
849 ov772x_reset(client);
850
851 return ret;
852 }
853
854 static int ov772x_get_selection(struct v4l2_subdev *sd,
855 struct v4l2_subdev_pad_config *cfg,
856 struct v4l2_subdev_selection *sel)
857 {
858 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
859 return -EINVAL;
860
861 sel->r.left = 0;
862 sel->r.top = 0;
863 switch (sel->target) {
864 case V4L2_SEL_TGT_CROP_BOUNDS:
865 case V4L2_SEL_TGT_CROP_DEFAULT:
866 sel->r.width = OV772X_MAX_WIDTH;
867 sel->r.height = OV772X_MAX_HEIGHT;
868 return 0;
869 case V4L2_SEL_TGT_CROP:
870 sel->r.width = VGA_WIDTH;
871 sel->r.height = VGA_HEIGHT;
872 return 0;
873 default:
874 return -EINVAL;
875 }
876 }
877
878 static int ov772x_get_fmt(struct v4l2_subdev *sd,
879 struct v4l2_subdev_pad_config *cfg,
880 struct v4l2_subdev_format *format)
881 {
882 struct v4l2_mbus_framefmt *mf = &format->format;
883 struct ov772x_priv *priv = to_ov772x(sd);
884
885 if (format->pad)
886 return -EINVAL;
887
888 mf->width = priv->win->rect.width;
889 mf->height = priv->win->rect.height;
890 mf->code = priv->cfmt->code;
891 mf->colorspace = priv->cfmt->colorspace;
892 mf->field = V4L2_FIELD_NONE;
893
894 return 0;
895 }
896
897 static int ov772x_set_fmt(struct v4l2_subdev *sd,
898 struct v4l2_subdev_pad_config *cfg,
899 struct v4l2_subdev_format *format)
900 {
901 struct ov772x_priv *priv = to_ov772x(sd);
902 struct v4l2_mbus_framefmt *mf = &format->format;
903 const struct ov772x_color_format *cfmt;
904 const struct ov772x_win_size *win;
905 int ret;
906
907 if (format->pad)
908 return -EINVAL;
909
910 ov772x_select_params(mf, &cfmt, &win);
911
912 mf->code = cfmt->code;
913 mf->width = win->rect.width;
914 mf->height = win->rect.height;
915 mf->field = V4L2_FIELD_NONE;
916 mf->colorspace = cfmt->colorspace;
917
918 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
919 cfg->try_fmt = *mf;
920 return 0;
921 }
922
923 ret = ov772x_set_params(priv, cfmt, win);
924 if (ret < 0)
925 return ret;
926
927 priv->win = win;
928 priv->cfmt = cfmt;
929 return 0;
930 }
931
932 static int ov772x_video_probe(struct ov772x_priv *priv)
933 {
934 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
935 u8 pid, ver;
936 const char *devname;
937 int ret;
938
939 ret = ov772x_s_power(&priv->subdev, 1);
940 if (ret < 0)
941 return ret;
942
943 /*
944 * check and show product ID and manufacturer ID
945 */
946 pid = ov772x_read(client, PID);
947 ver = ov772x_read(client, VER);
948
949 switch (VERSION(pid, ver)) {
950 case OV7720:
951 devname = "ov7720";
952 break;
953 case OV7725:
954 devname = "ov7725";
955 break;
956 default:
957 dev_err(&client->dev,
958 "Product ID error %x:%x\n", pid, ver);
959 ret = -ENODEV;
960 goto done;
961 }
962
963 dev_info(&client->dev,
964 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
965 devname,
966 pid,
967 ver,
968 ov772x_read(client, MIDH),
969 ov772x_read(client, MIDL));
970 ret = v4l2_ctrl_handler_setup(&priv->hdl);
971
972 done:
973 ov772x_s_power(&priv->subdev, 0);
974 return ret;
975 }
976
977 static const struct v4l2_ctrl_ops ov772x_ctrl_ops = {
978 .s_ctrl = ov772x_s_ctrl,
979 };
980
981 static const struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
982 #ifdef CONFIG_VIDEO_ADV_DEBUG
983 .g_register = ov772x_g_register,
984 .s_register = ov772x_s_register,
985 #endif
986 .s_power = ov772x_s_power,
987 };
988
989 static int ov772x_enum_mbus_code(struct v4l2_subdev *sd,
990 struct v4l2_subdev_pad_config *cfg,
991 struct v4l2_subdev_mbus_code_enum *code)
992 {
993 if (code->pad || code->index >= ARRAY_SIZE(ov772x_cfmts))
994 return -EINVAL;
995
996 code->code = ov772x_cfmts[code->index].code;
997 return 0;
998 }
999
1000 static int ov772x_g_mbus_config(struct v4l2_subdev *sd,
1001 struct v4l2_mbus_config *cfg)
1002 {
1003 struct i2c_client *client = v4l2_get_subdevdata(sd);
1004 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1005
1006 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
1007 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
1008 V4L2_MBUS_DATA_ACTIVE_HIGH;
1009 cfg->type = V4L2_MBUS_PARALLEL;
1010 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
1011
1012 return 0;
1013 }
1014
1015 static const struct v4l2_subdev_video_ops ov772x_subdev_video_ops = {
1016 .s_stream = ov772x_s_stream,
1017 .g_mbus_config = ov772x_g_mbus_config,
1018 };
1019
1020 static const struct v4l2_subdev_pad_ops ov772x_subdev_pad_ops = {
1021 .enum_mbus_code = ov772x_enum_mbus_code,
1022 .get_selection = ov772x_get_selection,
1023 .get_fmt = ov772x_get_fmt,
1024 .set_fmt = ov772x_set_fmt,
1025 };
1026
1027 static const struct v4l2_subdev_ops ov772x_subdev_ops = {
1028 .core = &ov772x_subdev_core_ops,
1029 .video = &ov772x_subdev_video_ops,
1030 .pad = &ov772x_subdev_pad_ops,
1031 };
1032
1033 /*
1034 * i2c_driver function
1035 */
1036
1037 static int ov772x_probe(struct i2c_client *client,
1038 const struct i2c_device_id *did)
1039 {
1040 struct ov772x_priv *priv;
1041 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1042 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1043 int ret;
1044
1045 if (!ssdd || !ssdd->drv_priv) {
1046 dev_err(&client->dev, "OV772X: missing platform data!\n");
1047 return -EINVAL;
1048 }
1049
1050 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
1051 I2C_FUNC_PROTOCOL_MANGLING)) {
1052 dev_err(&adapter->dev,
1053 "I2C-Adapter doesn't support SMBUS_BYTE_DATA or PROTOCOL_MANGLING\n");
1054 return -EIO;
1055 }
1056 client->flags |= I2C_CLIENT_SCCB;
1057
1058 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1059 if (!priv)
1060 return -ENOMEM;
1061
1062 priv->info = ssdd->drv_priv;
1063
1064 v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
1065 v4l2_ctrl_handler_init(&priv->hdl, 3);
1066 v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1067 V4L2_CID_VFLIP, 0, 1, 1, 0);
1068 v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1069 V4L2_CID_HFLIP, 0, 1, 1, 0);
1070 v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1071 V4L2_CID_BAND_STOP_FILTER, 0, 256, 1, 0);
1072 priv->subdev.ctrl_handler = &priv->hdl;
1073 if (priv->hdl.error)
1074 return priv->hdl.error;
1075
1076 priv->clk = v4l2_clk_get(&client->dev, "mclk");
1077 if (IS_ERR(priv->clk)) {
1078 ret = PTR_ERR(priv->clk);
1079 goto eclkget;
1080 }
1081
1082 ret = ov772x_video_probe(priv);
1083 if (ret < 0) {
1084 v4l2_clk_put(priv->clk);
1085 eclkget:
1086 v4l2_ctrl_handler_free(&priv->hdl);
1087 } else {
1088 priv->cfmt = &ov772x_cfmts[0];
1089 priv->win = &ov772x_win_sizes[0];
1090 }
1091
1092 return ret;
1093 }
1094
1095 static int ov772x_remove(struct i2c_client *client)
1096 {
1097 struct ov772x_priv *priv = to_ov772x(i2c_get_clientdata(client));
1098
1099 v4l2_clk_put(priv->clk);
1100 v4l2_device_unregister_subdev(&priv->subdev);
1101 v4l2_ctrl_handler_free(&priv->hdl);
1102 return 0;
1103 }
1104
1105 static const struct i2c_device_id ov772x_id[] = {
1106 { "ov772x", 0 },
1107 { }
1108 };
1109 MODULE_DEVICE_TABLE(i2c, ov772x_id);
1110
1111 static struct i2c_driver ov772x_i2c_driver = {
1112 .driver = {
1113 .name = "ov772x",
1114 },
1115 .probe = ov772x_probe,
1116 .remove = ov772x_remove,
1117 .id_table = ov772x_id,
1118 };
1119
1120 module_i2c_driver(ov772x_i2c_driver);
1121
1122 MODULE_DESCRIPTION("SoC Camera driver for ov772x");
1123 MODULE_AUTHOR("Kuninori Morimoto");
1124 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support