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-fwnode.h>
35 #include <media/v4l2-image-sizes.h>
36 #include <media/v4l2-subdev.h>
37
38 /*
39 * register offset
40 */
41 #define GAIN 0x00 /* AGC - Gain control gain setting */
42 #define BLUE 0x01 /* AWB - Blue channel gain setting */
43 #define RED 0x02 /* AWB - Red channel gain setting */
44 #define GREEN 0x03 /* AWB - Green channel gain setting */
45 #define COM1 0x04 /* Common control 1 */
46 #define BAVG 0x05 /* U/B Average Level */
47 #define GAVG 0x06 /* Y/Gb Average Level */
48 #define RAVG 0x07 /* V/R Average Level */
49 #define AECH 0x08 /* Exposure Value - AEC MSBs */
50 #define COM2 0x09 /* Common control 2 */
51 #define PID 0x0A /* Product ID Number MSB */
52 #define VER 0x0B /* Product ID Number LSB */
53 #define COM3 0x0C /* Common control 3 */
54 #define COM4 0x0D /* Common control 4 */
55 #define COM5 0x0E /* Common control 5 */
56 #define COM6 0x0F /* Common control 6 */
57 #define AEC 0x10 /* Exposure Value */
58 #define CLKRC 0x11 /* Internal clock */
59 #define COM7 0x12 /* Common control 7 */
60 #define COM8 0x13 /* Common control 8 */
61 #define COM9 0x14 /* Common control 9 */
62 #define COM10 0x15 /* Common control 10 */
63 #define REG16 0x16 /* Register 16 */
64 #define HSTART 0x17 /* Horizontal sensor size */
65 #define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
66 #define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
67 #define VSIZE 0x1A /* Vertical sensor size */
68 #define PSHFT 0x1B /* Data format - pixel delay select */
69 #define MIDH 0x1C /* Manufacturer ID byte - high */
70 #define MIDL 0x1D /* Manufacturer ID byte - low */
71 #define LAEC 0x1F /* Fine AEC value */
72 #define COM11 0x20 /* Common control 11 */
73 #define BDBASE 0x22 /* Banding filter Minimum AEC value */
74 #define DBSTEP 0x23 /* Banding filter Maximum Setp */
75 #define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
76 #define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
77 #define VPT 0x26 /* AGC/AEC Fast mode operating region */
78 #define REG28 0x28 /* Register 28 */
79 #define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
80 #define EXHCH 0x2A /* Dummy pixel insert MSB */
81 #define EXHCL 0x2B /* Dummy pixel insert LSB */
82 #define VOUTSIZE 0x2C /* Vertical data output size MSBs */
83 #define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
84 #define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
85 #define YAVE 0x2F /* Y/G Channel Average value */
86 #define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
87 #define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
88 #define HREF 0x32 /* Image start and size control */
89 #define DM_LNL 0x33 /* Dummy line low 8 bits */
90 #define DM_LNH 0x34 /* Dummy line high 8 bits */
91 #define ADOFF_B 0x35 /* AD offset compensation value for B channel */
92 #define ADOFF_R 0x36 /* AD offset compensation value for R channel */
93 #define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
94 #define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
95 #define OFF_B 0x39 /* Analog process B channel offset value */
96 #define OFF_R 0x3A /* Analog process R channel offset value */
97 #define OFF_GB 0x3B /* Analog process Gb channel offset value */
98 #define OFF_GR 0x3C /* Analog process Gr channel offset value */
99 #define COM12 0x3D /* Common control 12 */
100 #define COM13 0x3E /* Common control 13 */
101 #define COM14 0x3F /* Common control 14 */
102 #define COM15 0x40 /* Common control 15*/
103 #define COM16 0x41 /* Common control 16 */
104 #define TGT_B 0x42 /* BLC blue channel target value */
105 #define TGT_R 0x43 /* BLC red channel target value */
106 #define TGT_GB 0x44 /* BLC Gb channel target value */
107 #define TGT_GR 0x45 /* BLC Gr channel target value */
108 /* for ov7720 */
109 #define LCC0 0x46 /* Lens correction control 0 */
110 #define LCC1 0x47 /* Lens correction option 1 - X coordinate */
111 #define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
112 #define LCC3 0x49 /* Lens correction option 3 */
113 #define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
114 #define LCC5 0x4B /* Lens correction option 5 */
115 #define LCC6 0x4C /* Lens correction option 6 */
116 /* for ov7725 */
117 #define LC_CTR 0x46 /* Lens correction control */
118 #define LC_XC 0x47 /* X coordinate of lens correction center relative */
119 #define LC_YC 0x48 /* Y coordinate of lens correction center relative */
120 #define LC_COEF 0x49 /* Lens correction coefficient */
121 #define LC_RADI 0x4A /* Lens correction radius */
122 #define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
123 #define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
124
125 #define FIXGAIN 0x4D /* Analog fix gain amplifer */
126 #define AREF0 0x4E /* Sensor reference control */
127 #define AREF1 0x4F /* Sensor reference current control */
128 #define AREF2 0x50 /* Analog reference control */
129 #define AREF3 0x51 /* ADC reference control */
130 #define AREF4 0x52 /* ADC reference control */
131 #define AREF5 0x53 /* ADC reference control */
132 #define AREF6 0x54 /* Analog reference control */
133 #define AREF7 0x55 /* Analog reference control */
134 #define UFIX 0x60 /* U channel fixed value output */
135 #define VFIX 0x61 /* V channel fixed value output */
136 #define AWBB_BLK 0x62 /* AWB option for advanced AWB */
137 #define AWB_CTRL0 0x63 /* AWB control byte 0 */
138 #define DSP_CTRL1 0x64 /* DSP control byte 1 */
139 #define DSP_CTRL2 0x65 /* DSP control byte 2 */
140 #define DSP_CTRL3 0x66 /* DSP control byte 3 */
141 #define DSP_CTRL4 0x67 /* DSP control byte 4 */
142 #define AWB_BIAS 0x68 /* AWB BLC level clip */
143 #define AWB_CTRL1 0x69 /* AWB control 1 */
144 #define AWB_CTRL2 0x6A /* AWB control 2 */
145 #define AWB_CTRL3 0x6B /* AWB control 3 */
146 #define AWB_CTRL4 0x6C /* AWB control 4 */
147 #define AWB_CTRL5 0x6D /* AWB control 5 */
148 #define AWB_CTRL6 0x6E /* AWB control 6 */
149 #define AWB_CTRL7 0x6F /* AWB control 7 */
150 #define AWB_CTRL8 0x70 /* AWB control 8 */
151 #define AWB_CTRL9 0x71 /* AWB control 9 */
152 #define AWB_CTRL10 0x72 /* AWB control 10 */
153 #define AWB_CTRL11 0x73 /* AWB control 11 */
154 #define AWB_CTRL12 0x74 /* AWB control 12 */
155 #define AWB_CTRL13 0x75 /* AWB control 13 */
156 #define AWB_CTRL14 0x76 /* AWB control 14 */
157 #define AWB_CTRL15 0x77 /* AWB control 15 */
158 #define AWB_CTRL16 0x78 /* AWB control 16 */
159 #define AWB_CTRL17 0x79 /* AWB control 17 */
160 #define AWB_CTRL18 0x7A /* AWB control 18 */
161 #define AWB_CTRL19 0x7B /* AWB control 19 */
162 #define AWB_CTRL20 0x7C /* AWB control 20 */
163 #define AWB_CTRL21 0x7D /* AWB control 21 */
164 #define GAM1 0x7E /* Gamma Curve 1st segment input end point */
165 #define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
166 #define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
167 #define GAM4 0x81 /* Gamma Curve 4th segment input end point */
168 #define GAM5 0x82 /* Gamma Curve 5th segment input end point */
169 #define GAM6 0x83 /* Gamma Curve 6th segment input end point */
170 #define GAM7 0x84 /* Gamma Curve 7th segment input end point */
171 #define GAM8 0x85 /* Gamma Curve 8th segment input end point */
172 #define GAM9 0x86 /* Gamma Curve 9th segment input end point */
173 #define GAM10 0x87 /* Gamma Curve 10th segment input end point */
174 #define GAM11 0x88 /* Gamma Curve 11th segment input end point */
175 #define GAM12 0x89 /* Gamma Curve 12th segment input end point */
176 #define GAM13 0x8A /* Gamma Curve 13th segment input end point */
177 #define GAM14 0x8B /* Gamma Curve 14th segment input end point */
178 #define GAM15 0x8C /* Gamma Curve 15th segment input end point */
179 #define SLOP 0x8D /* Gamma curve highest segment slope */
180 #define DNSTH 0x8E /* De-noise threshold */
181 #define EDGE_STRNGT 0x8F /* Edge strength control when manual mode */
182 #define EDGE_TRSHLD 0x90 /* Edge threshold control when manual mode */
183 #define DNSOFF 0x91 /* Auto De-noise threshold control */
184 #define EDGE_UPPER 0x92 /* Edge strength upper limit when Auto mode */
185 #define EDGE_LOWER 0x93 /* Edge strength lower limit when Auto mode */
186 #define MTX1 0x94 /* Matrix coefficient 1 */
187 #define MTX2 0x95 /* Matrix coefficient 2 */
188 #define MTX3 0x96 /* Matrix coefficient 3 */
189 #define MTX4 0x97 /* Matrix coefficient 4 */
190 #define MTX5 0x98 /* Matrix coefficient 5 */
191 #define MTX6 0x99 /* Matrix coefficient 6 */
192 #define MTX_CTRL 0x9A /* Matrix control */
193 #define BRIGHT 0x9B /* Brightness control */
194 #define CNTRST 0x9C /* Contrast contrast */
195 #define CNTRST_CTRL 0x9D /* Contrast contrast center */
196 #define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
197 #define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
198 #define SCAL0 0xA0 /* Scaling control 0 */
199 #define SCAL1 0xA1 /* Scaling control 1 */
200 #define SCAL2 0xA2 /* Scaling control 2 */
201 #define FIFODLYM 0xA3 /* FIFO manual mode delay control */
202 #define FIFODLYA 0xA4 /* FIFO auto mode delay control */
203 #define SDE 0xA6 /* Special digital effect control */
204 #define USAT 0xA7 /* U component saturation control */
205 #define VSAT 0xA8 /* V component saturation control */
206 /* for ov7720 */
207 #define HUE0 0xA9 /* Hue control 0 */
208 #define HUE1 0xAA /* Hue control 1 */
209 /* for ov7725 */
210 #define HUECOS 0xA9 /* Cosine value */
211 #define HUESIN 0xAA /* Sine value */
212
213 #define SIGN 0xAB /* Sign bit for Hue and contrast */
214 #define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
215
216 /*
217 * register detail
218 */
219
220 /* COM2 */
221 #define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
222 /* Output drive capability */
223 #define OCAP_1x 0x00 /* 1x */
224 #define OCAP_2x 0x01 /* 2x */
225 #define OCAP_3x 0x02 /* 3x */
226 #define OCAP_4x 0x03 /* 4x */
227
228 /* COM3 */
229 #define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
230 #define IMG_MASK (VFLIP_IMG | HFLIP_IMG | SCOLOR_TEST)
231
232 #define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
233 #define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
234 #define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
235 #define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
236 #define SWAP_ML 0x08 /* Swap output MSB/LSB */
237 /* Tri-state option for output clock */
238 #define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
239 /* 1: No tri-state at this period */
240 /* Tri-state option for output data */
241 #define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
242 /* 1: No tri-state at this period */
243 #define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
244
245 /* COM4 */
246 /* PLL frequency control */
247 #define PLL_BYPASS 0x00 /* 00: Bypass PLL */
248 #define PLL_4x 0x40 /* 01: PLL 4x */
249 #define PLL_6x 0x80 /* 10: PLL 6x */
250 #define PLL_8x 0xc0 /* 11: PLL 8x */
251 /* AEC evaluate window */
252 #define AEC_FULL 0x00 /* 00: Full window */
253 #define AEC_1p2 0x10 /* 01: 1/2 window */
254 #define AEC_1p4 0x20 /* 10: 1/4 window */
255 #define AEC_2p3 0x30 /* 11: Low 2/3 window */
256 #define COM4_RESERVED 0x01 /* Reserved bit */
257
258 /* COM5 */
259 #define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
260 #define AFR_SPPED 0x40 /* Auto frame rate control speed selection */
261 /* Auto frame rate max rate control */
262 #define AFR_NO_RATE 0x00 /* No reduction of frame rate */
263 #define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
264 #define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
265 #define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
266 /* Auto frame rate active point control */
267 #define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
268 #define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
269 #define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
270 #define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
271 /* AEC max step control */
272 #define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
273 /* 1 : No limit to AEC increase step */
274 /* CLKRC */
275 /* Input clock divider register */
276 #define CLKRC_RESERVED 0x80 /* Reserved bit */
277 #define CLKRC_DIV(n) ((n) - 1)
278
279 /* COM7 */
280 /* SCCB Register Reset */
281 #define SCCB_RESET 0x80 /* 0 : No change */
282 /* 1 : Resets all registers to default */
283 /* Resolution selection */
284 #define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
285 #define SLCT_VGA 0x00 /* 0 : VGA */
286 #define SLCT_QVGA 0x40 /* 1 : QVGA */
287 #define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
288 #define SENSOR_RAW 0x10 /* Sensor RAW */
289 /* RGB output format control */
290 #define FMT_MASK 0x0c /* Mask of color format */
291 #define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
292 #define FMT_RGB565 0x04 /* 01 : RGB 565 */
293 #define FMT_RGB555 0x08 /* 10 : RGB 555 */
294 #define FMT_RGB444 0x0c /* 11 : RGB 444 */
295 /* Output format control */
296 #define OFMT_MASK 0x03 /* Mask of output format */
297 #define OFMT_YUV 0x00 /* 00 : YUV */
298 #define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
299 #define OFMT_RGB 0x02 /* 10 : RGB */
300 #define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
301
302 /* COM8 */
303 #define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
304 /* AEC Setp size limit */
305 #define UNLMT_STEP 0x40 /* 0 : Step size is limited */
306 /* 1 : Unlimited step size */
307 #define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
308 #define AEC_BND 0x10 /* Enable AEC below banding value */
309 #define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
310 #define AGC_ON 0x04 /* AGC Enable */
311 #define AWB_ON 0x02 /* AWB Enable */
312 #define AEC_ON 0x01 /* AEC Enable */
313
314 /* COM9 */
315 #define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
316 /* Automatic gain ceiling - maximum AGC value */
317 #define GAIN_2x 0x00 /* 000 : 2x */
318 #define GAIN_4x 0x10 /* 001 : 4x */
319 #define GAIN_8x 0x20 /* 010 : 8x */
320 #define GAIN_16x 0x30 /* 011 : 16x */
321 #define GAIN_32x 0x40 /* 100 : 32x */
322 #define GAIN_64x 0x50 /* 101 : 64x */
323 #define GAIN_128x 0x60 /* 110 : 128x */
324 #define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
325 #define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
326
327 /* COM11 */
328 #define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
329 #define SGLF_TRIG 0x01 /* Single frame transfer trigger */
330
331 /* HREF */
332 #define HREF_VSTART_SHIFT 6 /* VSTART LSB */
333 #define HREF_HSTART_SHIFT 4 /* HSTART 2 LSBs */
334 #define HREF_VSIZE_SHIFT 2 /* VSIZE LSB */
335 #define HREF_HSIZE_SHIFT 0 /* HSIZE 2 LSBs */
336
337 /* EXHCH */
338 #define EXHCH_VSIZE_SHIFT 2 /* VOUTSIZE LSB */
339 #define EXHCH_HSIZE_SHIFT 0 /* HOUTSIZE 2 LSBs */
340
341 /* DSP_CTRL1 */
342 #define FIFO_ON 0x80 /* FIFO enable/disable selection */
343 #define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
344 #define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
345 #define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
346 #define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
347 #define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
348 #define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
349 #define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
350
351 /* DSP_CTRL3 */
352 #define UV_MASK 0x80 /* UV output sequence option */
353 #define UV_ON 0x80 /* ON */
354 #define UV_OFF 0x00 /* OFF */
355 #define CBAR_MASK 0x20 /* DSP Color bar mask */
356 #define CBAR_ON 0x20 /* ON */
357 #define CBAR_OFF 0x00 /* OFF */
358
359 /* DSP_CTRL4 */
360 #define DSP_OFMT_YUV 0x00
361 #define DSP_OFMT_RGB 0x00
362 #define DSP_OFMT_RAW8 0x02
363 #define DSP_OFMT_RAW10 0x03
364
365 /* DSPAUTO (DSP Auto Function ON/OFF Control) */
366 #define AWB_ACTRL 0x80 /* AWB auto threshold control */
367 #define DENOISE_ACTRL 0x40 /* De-noise auto threshold control */
368 #define EDGE_ACTRL 0x20 /* Edge enhancement auto strength control */
369 #define UV_ACTRL 0x10 /* UV adjust auto slope control */
370 #define SCAL0_ACTRL 0x08 /* Auto scaling factor control */
371 #define SCAL1_2_ACTRL 0x04 /* Auto scaling factor control */
372
373 #define OV772X_MAX_WIDTH VGA_WIDTH
374 #define OV772X_MAX_HEIGHT VGA_HEIGHT
375
376 /*
377 * ID
378 */
379 #define OV7720 0x7720
380 #define OV7725 0x7721
381 #define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
382
383 /*
384 * PLL multipliers
385 */
386 static struct {
387 unsigned int mult;
388 u8 com4;
389 } ov772x_pll[] = {
390 { 1, PLL_BYPASS, },
391 { 4, PLL_4x, },
392 { 6, PLL_6x, },
393 { 8, PLL_8x, },
394 };
395
396 /*
397 * struct
398 */
399
400 struct ov772x_color_format {
401 u32 code;
402 enum v4l2_colorspace colorspace;
403 u8 dsp3;
404 u8 dsp4;
405 u8 com3;
406 u8 com7;
407 };
408
409 struct ov772x_win_size {
410 char *name;
411 unsigned char com7_bit;
412 unsigned int sizeimage;
413 struct v4l2_rect rect;
414 };
415
416 struct ov772x_priv {
417 struct v4l2_subdev subdev;
418 struct v4l2_ctrl_handler hdl;
419 struct clk *clk;
420 struct regmap *regmap;
421 struct ov772x_camera_info *info;
422 struct gpio_desc *pwdn_gpio;
423 struct gpio_desc *rstb_gpio;
424 const struct ov772x_color_format *cfmt;
425 const struct ov772x_win_size *win;
426 struct v4l2_ctrl *vflip_ctrl;
427 struct v4l2_ctrl *hflip_ctrl;
428 unsigned int test_pattern;
429 /* band_filter = COM8[5] ? 256 - BDBASE : 0 */
430 struct v4l2_ctrl *band_filter_ctrl;
431 unsigned int fps;
432 /* lock to protect power_count and streaming */
433 struct mutex lock;
434 int power_count;
435 int streaming;
436 #ifdef CONFIG_MEDIA_CONTROLLER
437 struct media_pad pad;
438 #endif
439 enum v4l2_mbus_type bus_type;
440 };
441
442 /*
443 * supported color format list
444 */
445 static const struct ov772x_color_format ov772x_cfmts[] = {
446 {
447 .code = MEDIA_BUS_FMT_YUYV8_2X8,
448 .colorspace = V4L2_COLORSPACE_SRGB,
449 .dsp3 = 0x0,
450 .dsp4 = DSP_OFMT_YUV,
451 .com3 = SWAP_YUV,
452 .com7 = OFMT_YUV,
453 },
454 {
455 .code = MEDIA_BUS_FMT_YVYU8_2X8,
456 .colorspace = V4L2_COLORSPACE_SRGB,
457 .dsp3 = UV_ON,
458 .dsp4 = DSP_OFMT_YUV,
459 .com3 = SWAP_YUV,
460 .com7 = OFMT_YUV,
461 },
462 {
463 .code = MEDIA_BUS_FMT_UYVY8_2X8,
464 .colorspace = V4L2_COLORSPACE_SRGB,
465 .dsp3 = 0x0,
466 .dsp4 = DSP_OFMT_YUV,
467 .com3 = 0x0,
468 .com7 = OFMT_YUV,
469 },
470 {
471 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
472 .colorspace = V4L2_COLORSPACE_SRGB,
473 .dsp3 = 0x0,
474 .dsp4 = DSP_OFMT_YUV,
475 .com3 = SWAP_RGB,
476 .com7 = FMT_RGB555 | OFMT_RGB,
477 },
478 {
479 .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
480 .colorspace = V4L2_COLORSPACE_SRGB,
481 .dsp3 = 0x0,
482 .dsp4 = DSP_OFMT_YUV,
483 .com3 = 0x0,
484 .com7 = FMT_RGB555 | OFMT_RGB,
485 },
486 {
487 .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
488 .colorspace = V4L2_COLORSPACE_SRGB,
489 .dsp3 = 0x0,
490 .dsp4 = DSP_OFMT_YUV,
491 .com3 = SWAP_RGB,
492 .com7 = FMT_RGB565 | OFMT_RGB,
493 },
494 {
495 .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
496 .colorspace = V4L2_COLORSPACE_SRGB,
497 .dsp3 = 0x0,
498 .dsp4 = DSP_OFMT_YUV,
499 .com3 = 0x0,
500 .com7 = FMT_RGB565 | OFMT_RGB,
501 },
502 {
503 /* Setting DSP4 to DSP_OFMT_RAW8 still gives 10-bit output,
504 * regardless of the COM7 value. We can thus only support 10-bit
505 * Bayer until someone figures it out.
506 */
507 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
508 .colorspace = V4L2_COLORSPACE_SRGB,
509 .dsp3 = 0x0,
510 .dsp4 = DSP_OFMT_RAW10,
511 .com3 = 0x0,
512 .com7 = SENSOR_RAW | OFMT_BRAW,
513 },
514 };
515
516 /*
517 * window size list
518 */
519
520 static const struct ov772x_win_size ov772x_win_sizes[] = {
521 {
522 .name = "VGA",
523 .com7_bit = SLCT_VGA,
524 .sizeimage = 510 * 748,
525 .rect = {
526 .left = 140,
527 .top = 14,
528 .width = VGA_WIDTH,
529 .height = VGA_HEIGHT,
530 },
531 }, {
532 .name = "QVGA",
533 .com7_bit = SLCT_QVGA,
534 .sizeimage = 278 * 576,
535 .rect = {
536 .left = 252,
537 .top = 6,
538 .width = QVGA_WIDTH,
539 .height = QVGA_HEIGHT,
540 },
541 },
542 };
543
544 static const char * const ov772x_test_pattern_menu[] = {
545 "Disabled",
546 "Vertical Color Bar Type 1",
547 };
548
549 /*
550 * frame rate settings lists
551 */
552 static const unsigned int ov772x_frame_intervals[] = { 5, 10, 15, 20, 30, 60 };
553
554 /*
555 * general function
556 */
557
to_ov772x(struct v4l2_subdev * sd)558 static struct ov772x_priv *to_ov772x(struct v4l2_subdev *sd)
559 {
560 return container_of(sd, struct ov772x_priv, subdev);
561 }
562
ov772x_reset(struct ov772x_priv * priv)563 static int ov772x_reset(struct ov772x_priv *priv)
564 {
565 int ret;
566
567 ret = regmap_write(priv->regmap, COM7, SCCB_RESET);
568 if (ret < 0)
569 return ret;
570
571 usleep_range(1000, 5000);
572
573 return regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
574 SOFT_SLEEP_MODE);
575 }
576
577 /*
578 * subdev ops
579 */
580
ov772x_s_stream(struct v4l2_subdev * sd,int enable)581 static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
582 {
583 struct i2c_client *client = v4l2_get_subdevdata(sd);
584 struct ov772x_priv *priv = to_ov772x(sd);
585 int ret = 0;
586
587 mutex_lock(&priv->lock);
588
589 if (priv->streaming == enable)
590 goto done;
591
592 if (priv->bus_type == V4L2_MBUS_BT656) {
593 ret = regmap_update_bits(priv->regmap, COM7, ITU656_ON_OFF,
594 enable ?
595 ITU656_ON_OFF : ~ITU656_ON_OFF);
596 if (ret)
597 goto done;
598 }
599
600 ret = regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
601 enable ? 0 : SOFT_SLEEP_MODE);
602 if (ret)
603 goto done;
604
605 if (enable) {
606 dev_dbg(&client->dev, "format %d, win %s\n",
607 priv->cfmt->code, priv->win->name);
608 }
609 priv->streaming = enable;
610
611 done:
612 mutex_unlock(&priv->lock);
613
614 return ret;
615 }
616
ov772x_select_fps(struct ov772x_priv * priv,struct v4l2_fract * tpf)617 static unsigned int ov772x_select_fps(struct ov772x_priv *priv,
618 struct v4l2_fract *tpf)
619 {
620 unsigned int fps = tpf->numerator ?
621 tpf->denominator / tpf->numerator :
622 tpf->denominator;
623 unsigned int best_diff;
624 unsigned int diff;
625 unsigned int idx;
626 unsigned int i;
627
628 /* Approximate to the closest supported frame interval. */
629 best_diff = ~0L;
630 for (i = 0, idx = 0; i < ARRAY_SIZE(ov772x_frame_intervals); i++) {
631 diff = abs(fps - ov772x_frame_intervals[i]);
632 if (diff < best_diff) {
633 idx = i;
634 best_diff = diff;
635 }
636 }
637
638 return ov772x_frame_intervals[idx];
639 }
640
ov772x_set_frame_rate(struct ov772x_priv * priv,unsigned int fps,const struct ov772x_color_format * cfmt,const struct ov772x_win_size * win)641 static int ov772x_set_frame_rate(struct ov772x_priv *priv,
642 unsigned int fps,
643 const struct ov772x_color_format *cfmt,
644 const struct ov772x_win_size *win)
645 {
646 unsigned long fin = clk_get_rate(priv->clk);
647 unsigned int best_diff;
648 unsigned int fsize;
649 unsigned int pclk;
650 unsigned int diff;
651 unsigned int i;
652 u8 clkrc = 0;
653 u8 com4 = 0;
654 int ret;
655
656 /* Use image size (with blankings) to calculate desired pixel clock. */
657 switch (cfmt->com7 & OFMT_MASK) {
658 case OFMT_BRAW:
659 fsize = win->sizeimage;
660 break;
661 case OFMT_RGB:
662 case OFMT_YUV:
663 default:
664 fsize = win->sizeimage * 2;
665 break;
666 }
667
668 pclk = fps * fsize;
669
670 /*
671 * Pixel clock generation circuit is pretty simple:
672 *
673 * Fin -> [ / CLKRC_div] -> [ * PLL_mult] -> pclk
674 *
675 * Try to approximate the desired pixel clock testing all available
676 * PLL multipliers (1x, 4x, 6x, 8x) and calculate corresponding
677 * divisor with:
678 *
679 * div = PLL_mult * Fin / pclk
680 *
681 * and re-calculate the pixel clock using it:
682 *
683 * pclk = Fin * PLL_mult / CLKRC_div
684 *
685 * Choose the PLL_mult and CLKRC_div pair that gives a pixel clock
686 * closer to the desired one.
687 *
688 * The desired pixel clock is calculated using a known frame size
689 * (blanking included) and FPS.
690 */
691 best_diff = ~0L;
692 for (i = 0; i < ARRAY_SIZE(ov772x_pll); i++) {
693 unsigned int pll_mult = ov772x_pll[i].mult;
694 unsigned int pll_out = pll_mult * fin;
695 unsigned int t_pclk;
696 unsigned int div;
697
698 if (pll_out < pclk)
699 continue;
700
701 div = DIV_ROUND_CLOSEST(pll_out, pclk);
702 t_pclk = DIV_ROUND_CLOSEST(fin * pll_mult, div);
703 diff = abs(pclk - t_pclk);
704 if (diff < best_diff) {
705 best_diff = diff;
706 clkrc = CLKRC_DIV(div);
707 com4 = ov772x_pll[i].com4;
708 }
709 }
710
711 ret = regmap_write(priv->regmap, COM4, com4 | COM4_RESERVED);
712 if (ret < 0)
713 return ret;
714
715 ret = regmap_write(priv->regmap, CLKRC, clkrc | CLKRC_RESERVED);
716 if (ret < 0)
717 return ret;
718
719 return 0;
720 }
721
ov772x_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * ival)722 static int ov772x_g_frame_interval(struct v4l2_subdev *sd,
723 struct v4l2_subdev_frame_interval *ival)
724 {
725 struct ov772x_priv *priv = to_ov772x(sd);
726 struct v4l2_fract *tpf = &ival->interval;
727
728 tpf->numerator = 1;
729 tpf->denominator = priv->fps;
730
731 return 0;
732 }
733
ov772x_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * ival)734 static int ov772x_s_frame_interval(struct v4l2_subdev *sd,
735 struct v4l2_subdev_frame_interval *ival)
736 {
737 struct ov772x_priv *priv = to_ov772x(sd);
738 struct v4l2_fract *tpf = &ival->interval;
739 unsigned int fps;
740 int ret = 0;
741
742 mutex_lock(&priv->lock);
743
744 if (priv->streaming) {
745 ret = -EBUSY;
746 goto error;
747 }
748
749 fps = ov772x_select_fps(priv, tpf);
750
751 /*
752 * If the device is not powered up by the host driver do
753 * not apply any changes to H/W at this time. Instead
754 * the frame rate will be restored right after power-up.
755 */
756 if (priv->power_count > 0) {
757 ret = ov772x_set_frame_rate(priv, fps, priv->cfmt, priv->win);
758 if (ret)
759 goto error;
760 }
761
762 tpf->numerator = 1;
763 tpf->denominator = fps;
764 priv->fps = fps;
765
766 error:
767 mutex_unlock(&priv->lock);
768
769 return ret;
770 }
771
ov772x_s_ctrl(struct v4l2_ctrl * ctrl)772 static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
773 {
774 struct ov772x_priv *priv = container_of(ctrl->handler,
775 struct ov772x_priv, hdl);
776 struct regmap *regmap = priv->regmap;
777 int ret = 0;
778 u8 val;
779
780 /* v4l2_ctrl_lock() locks our own mutex */
781
782 /*
783 * If the device is not powered up by the host driver do
784 * not apply any controls to H/W at this time. Instead
785 * the controls will be restored right after power-up.
786 */
787 if (priv->power_count == 0)
788 return 0;
789
790 switch (ctrl->id) {
791 case V4L2_CID_VFLIP:
792 val = ctrl->val ? VFLIP_IMG : 0x00;
793 if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
794 val ^= VFLIP_IMG;
795 return regmap_update_bits(regmap, COM3, VFLIP_IMG, val);
796 case V4L2_CID_HFLIP:
797 val = ctrl->val ? HFLIP_IMG : 0x00;
798 if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
799 val ^= HFLIP_IMG;
800 return regmap_update_bits(regmap, COM3, HFLIP_IMG, val);
801 case V4L2_CID_BAND_STOP_FILTER:
802 if (!ctrl->val) {
803 /* Switch the filter off, it is on now */
804 ret = regmap_update_bits(regmap, BDBASE, 0xff, 0xff);
805 if (!ret)
806 ret = regmap_update_bits(regmap, COM8,
807 BNDF_ON_OFF, 0);
808 } else {
809 /* Switch the filter on, set AEC low limit */
810 val = 256 - ctrl->val;
811 ret = regmap_update_bits(regmap, COM8,
812 BNDF_ON_OFF, BNDF_ON_OFF);
813 if (!ret)
814 ret = regmap_update_bits(regmap, BDBASE,
815 0xff, val);
816 }
817
818 return ret;
819 case V4L2_CID_TEST_PATTERN:
820 priv->test_pattern = ctrl->val;
821 return 0;
822 }
823
824 return -EINVAL;
825 }
826
827 #ifdef CONFIG_VIDEO_ADV_DEBUG
ov772x_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)828 static int ov772x_g_register(struct v4l2_subdev *sd,
829 struct v4l2_dbg_register *reg)
830 {
831 struct ov772x_priv *priv = to_ov772x(sd);
832 int ret;
833 unsigned int val;
834
835 reg->size = 1;
836 if (reg->reg > 0xff)
837 return -EINVAL;
838
839 ret = regmap_read(priv->regmap, reg->reg, &val);
840 if (ret < 0)
841 return ret;
842
843 reg->val = (__u64)val;
844
845 return 0;
846 }
847
ov772x_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)848 static int ov772x_s_register(struct v4l2_subdev *sd,
849 const struct v4l2_dbg_register *reg)
850 {
851 struct ov772x_priv *priv = to_ov772x(sd);
852
853 if (reg->reg > 0xff ||
854 reg->val > 0xff)
855 return -EINVAL;
856
857 return regmap_write(priv->regmap, reg->reg, reg->val);
858 }
859 #endif
860
ov772x_power_on(struct ov772x_priv * priv)861 static int ov772x_power_on(struct ov772x_priv *priv)
862 {
863 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
864 int ret;
865
866 if (priv->clk) {
867 ret = clk_prepare_enable(priv->clk);
868 if (ret)
869 return ret;
870 }
871
872 if (priv->pwdn_gpio) {
873 gpiod_set_value(priv->pwdn_gpio, 1);
874 usleep_range(500, 1000);
875 }
876
877 /*
878 * FIXME: The reset signal is connected to a shared GPIO on some
879 * platforms (namely the SuperH Migo-R). Until a framework becomes
880 * available to handle this cleanly, request the GPIO temporarily
881 * to avoid conflicts.
882 */
883 priv->rstb_gpio = gpiod_get_optional(&client->dev, "reset",
884 GPIOD_OUT_LOW);
885 if (IS_ERR(priv->rstb_gpio)) {
886 dev_info(&client->dev, "Unable to get GPIO \"reset\"");
887 clk_disable_unprepare(priv->clk);
888 return PTR_ERR(priv->rstb_gpio);
889 }
890
891 if (priv->rstb_gpio) {
892 gpiod_set_value(priv->rstb_gpio, 1);
893 usleep_range(500, 1000);
894 gpiod_set_value(priv->rstb_gpio, 0);
895 usleep_range(500, 1000);
896
897 gpiod_put(priv->rstb_gpio);
898 }
899
900 return 0;
901 }
902
ov772x_power_off(struct ov772x_priv * priv)903 static int ov772x_power_off(struct ov772x_priv *priv)
904 {
905 clk_disable_unprepare(priv->clk);
906
907 if (priv->pwdn_gpio) {
908 gpiod_set_value(priv->pwdn_gpio, 0);
909 usleep_range(500, 1000);
910 }
911
912 return 0;
913 }
914
915 static int ov772x_set_params(struct ov772x_priv *priv,
916 const struct ov772x_color_format *cfmt,
917 const struct ov772x_win_size *win);
918
ov772x_s_power(struct v4l2_subdev * sd,int on)919 static int ov772x_s_power(struct v4l2_subdev *sd, int on)
920 {
921 struct ov772x_priv *priv = to_ov772x(sd);
922 int ret = 0;
923
924 mutex_lock(&priv->lock);
925
926 /* If the power count is modified from 0 to != 0 or from != 0 to 0,
927 * update the power state.
928 */
929 if (priv->power_count == !on) {
930 if (on) {
931 ret = ov772x_power_on(priv);
932 /*
933 * Restore the format, the frame rate, and
934 * the controls
935 */
936 if (!ret)
937 ret = ov772x_set_params(priv, priv->cfmt,
938 priv->win);
939 } else {
940 ret = ov772x_power_off(priv);
941 }
942 }
943
944 if (!ret) {
945 /* Update the power count. */
946 priv->power_count += on ? 1 : -1;
947 WARN(priv->power_count < 0, "Unbalanced power count\n");
948 WARN(priv->power_count > 1, "Duplicated s_power call\n");
949 }
950
951 mutex_unlock(&priv->lock);
952
953 return ret;
954 }
955
ov772x_select_win(u32 width,u32 height)956 static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height)
957 {
958 const struct ov772x_win_size *win = &ov772x_win_sizes[0];
959 u32 best_diff = UINT_MAX;
960 unsigned int i;
961
962 for (i = 0; i < ARRAY_SIZE(ov772x_win_sizes); ++i) {
963 u32 diff = abs(width - ov772x_win_sizes[i].rect.width)
964 + abs(height - ov772x_win_sizes[i].rect.height);
965 if (diff < best_diff) {
966 best_diff = diff;
967 win = &ov772x_win_sizes[i];
968 }
969 }
970
971 return win;
972 }
973
ov772x_select_params(const struct v4l2_mbus_framefmt * mf,const struct ov772x_color_format ** cfmt,const struct ov772x_win_size ** win)974 static void ov772x_select_params(const struct v4l2_mbus_framefmt *mf,
975 const struct ov772x_color_format **cfmt,
976 const struct ov772x_win_size **win)
977 {
978 unsigned int i;
979
980 /* Select a format. */
981 *cfmt = &ov772x_cfmts[0];
982
983 for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
984 if (mf->code == ov772x_cfmts[i].code) {
985 *cfmt = &ov772x_cfmts[i];
986 break;
987 }
988 }
989
990 /* Select a window size. */
991 *win = ov772x_select_win(mf->width, mf->height);
992 }
993
ov772x_edgectrl(struct ov772x_priv * priv)994 static int ov772x_edgectrl(struct ov772x_priv *priv)
995 {
996 struct regmap *regmap = priv->regmap;
997 int ret;
998
999 if (!priv->info)
1000 return 0;
1001
1002 if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
1003 /*
1004 * Manual Edge Control Mode.
1005 *
1006 * Edge auto strength bit is set by default.
1007 * Remove it when manual mode.
1008 */
1009
1010 ret = regmap_update_bits(regmap, DSPAUTO, EDGE_ACTRL, 0x00);
1011 if (ret < 0)
1012 return ret;
1013
1014 ret = regmap_update_bits(regmap, EDGE_TRSHLD,
1015 OV772X_EDGE_THRESHOLD_MASK,
1016 priv->info->edgectrl.threshold);
1017 if (ret < 0)
1018 return ret;
1019
1020 ret = regmap_update_bits(regmap, EDGE_STRNGT,
1021 OV772X_EDGE_STRENGTH_MASK,
1022 priv->info->edgectrl.strength);
1023 if (ret < 0)
1024 return ret;
1025
1026 } else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
1027 /*
1028 * Auto Edge Control Mode.
1029 *
1030 * Set upper and lower limit.
1031 */
1032 ret = regmap_update_bits(regmap, EDGE_UPPER,
1033 OV772X_EDGE_UPPER_MASK,
1034 priv->info->edgectrl.upper);
1035 if (ret < 0)
1036 return ret;
1037
1038 ret = regmap_update_bits(regmap, EDGE_LOWER,
1039 OV772X_EDGE_LOWER_MASK,
1040 priv->info->edgectrl.lower);
1041 if (ret < 0)
1042 return ret;
1043 }
1044
1045 return 0;
1046 }
1047
ov772x_set_params(struct ov772x_priv * priv,const struct ov772x_color_format * cfmt,const struct ov772x_win_size * win)1048 static int ov772x_set_params(struct ov772x_priv *priv,
1049 const struct ov772x_color_format *cfmt,
1050 const struct ov772x_win_size *win)
1051 {
1052 int ret;
1053 u8 val;
1054
1055 /* Reset hardware. */
1056 ov772x_reset(priv);
1057
1058 /* Edge Ctrl. */
1059 ret = ov772x_edgectrl(priv);
1060 if (ret < 0)
1061 return ret;
1062
1063 /* Format and window size. */
1064 ret = regmap_write(priv->regmap, HSTART, win->rect.left >> 2);
1065 if (ret < 0)
1066 goto ov772x_set_fmt_error;
1067 ret = regmap_write(priv->regmap, HSIZE, win->rect.width >> 2);
1068 if (ret < 0)
1069 goto ov772x_set_fmt_error;
1070 ret = regmap_write(priv->regmap, VSTART, win->rect.top >> 1);
1071 if (ret < 0)
1072 goto ov772x_set_fmt_error;
1073 ret = regmap_write(priv->regmap, VSIZE, win->rect.height >> 1);
1074 if (ret < 0)
1075 goto ov772x_set_fmt_error;
1076 ret = regmap_write(priv->regmap, HOUTSIZE, win->rect.width >> 2);
1077 if (ret < 0)
1078 goto ov772x_set_fmt_error;
1079 ret = regmap_write(priv->regmap, VOUTSIZE, win->rect.height >> 1);
1080 if (ret < 0)
1081 goto ov772x_set_fmt_error;
1082 ret = regmap_write(priv->regmap, HREF,
1083 ((win->rect.top & 1) << HREF_VSTART_SHIFT) |
1084 ((win->rect.left & 3) << HREF_HSTART_SHIFT) |
1085 ((win->rect.height & 1) << HREF_VSIZE_SHIFT) |
1086 ((win->rect.width & 3) << HREF_HSIZE_SHIFT));
1087 if (ret < 0)
1088 goto ov772x_set_fmt_error;
1089 ret = regmap_write(priv->regmap, EXHCH,
1090 ((win->rect.height & 1) << EXHCH_VSIZE_SHIFT) |
1091 ((win->rect.width & 3) << EXHCH_HSIZE_SHIFT));
1092 if (ret < 0)
1093 goto ov772x_set_fmt_error;
1094
1095 /* Set DSP_CTRL3. */
1096 val = cfmt->dsp3;
1097 if (val) {
1098 ret = regmap_update_bits(priv->regmap, DSP_CTRL3, UV_MASK, val);
1099 if (ret < 0)
1100 goto ov772x_set_fmt_error;
1101 }
1102
1103 /* DSP_CTRL4: AEC reference point and DSP output format. */
1104 if (cfmt->dsp4) {
1105 ret = regmap_write(priv->regmap, DSP_CTRL4, cfmt->dsp4);
1106 if (ret < 0)
1107 goto ov772x_set_fmt_error;
1108 }
1109
1110 /* Set COM3. */
1111 val = cfmt->com3;
1112 if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
1113 val |= VFLIP_IMG;
1114 if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
1115 val |= HFLIP_IMG;
1116 if (priv->vflip_ctrl->val)
1117 val ^= VFLIP_IMG;
1118 if (priv->hflip_ctrl->val)
1119 val ^= HFLIP_IMG;
1120 if (priv->test_pattern)
1121 val |= SCOLOR_TEST;
1122
1123 ret = regmap_update_bits(priv->regmap, COM3, SWAP_MASK | IMG_MASK, val);
1124 if (ret < 0)
1125 goto ov772x_set_fmt_error;
1126
1127 /* COM7: Sensor resolution and output format control. */
1128 ret = regmap_write(priv->regmap, COM7, win->com7_bit | cfmt->com7);
1129 if (ret < 0)
1130 goto ov772x_set_fmt_error;
1131
1132 /* COM4, CLKRC: Set pixel clock and framerate. */
1133 ret = ov772x_set_frame_rate(priv, priv->fps, cfmt, win);
1134 if (ret < 0)
1135 goto ov772x_set_fmt_error;
1136
1137 /* Set COM8. */
1138 if (priv->band_filter_ctrl->val) {
1139 unsigned short band_filter = priv->band_filter_ctrl->val;
1140
1141 ret = regmap_update_bits(priv->regmap, COM8,
1142 BNDF_ON_OFF, BNDF_ON_OFF);
1143 if (!ret)
1144 ret = regmap_update_bits(priv->regmap, BDBASE,
1145 0xff, 256 - band_filter);
1146 if (ret < 0)
1147 goto ov772x_set_fmt_error;
1148 }
1149
1150 return ret;
1151
1152 ov772x_set_fmt_error:
1153
1154 ov772x_reset(priv);
1155
1156 return ret;
1157 }
1158
ov772x_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)1159 static int ov772x_get_selection(struct v4l2_subdev *sd,
1160 struct v4l2_subdev_pad_config *cfg,
1161 struct v4l2_subdev_selection *sel)
1162 {
1163 struct ov772x_priv *priv = to_ov772x(sd);
1164
1165 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
1166 return -EINVAL;
1167
1168 sel->r.left = 0;
1169 sel->r.top = 0;
1170 switch (sel->target) {
1171 case V4L2_SEL_TGT_CROP_BOUNDS:
1172 case V4L2_SEL_TGT_CROP:
1173 sel->r.width = priv->win->rect.width;
1174 sel->r.height = priv->win->rect.height;
1175 return 0;
1176 default:
1177 return -EINVAL;
1178 }
1179 }
1180
ov772x_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)1181 static int ov772x_get_fmt(struct v4l2_subdev *sd,
1182 struct v4l2_subdev_pad_config *cfg,
1183 struct v4l2_subdev_format *format)
1184 {
1185 struct v4l2_mbus_framefmt *mf = &format->format;
1186 struct ov772x_priv *priv = to_ov772x(sd);
1187
1188 if (format->pad)
1189 return -EINVAL;
1190
1191 mf->width = priv->win->rect.width;
1192 mf->height = priv->win->rect.height;
1193 mf->code = priv->cfmt->code;
1194 mf->colorspace = priv->cfmt->colorspace;
1195 mf->field = V4L2_FIELD_NONE;
1196
1197 return 0;
1198 }
1199
ov772x_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)1200 static int ov772x_set_fmt(struct v4l2_subdev *sd,
1201 struct v4l2_subdev_pad_config *cfg,
1202 struct v4l2_subdev_format *format)
1203 {
1204 struct ov772x_priv *priv = to_ov772x(sd);
1205 struct v4l2_mbus_framefmt *mf = &format->format;
1206 const struct ov772x_color_format *cfmt;
1207 const struct ov772x_win_size *win;
1208 int ret = 0;
1209
1210 if (format->pad)
1211 return -EINVAL;
1212
1213 ov772x_select_params(mf, &cfmt, &win);
1214
1215 mf->code = cfmt->code;
1216 mf->width = win->rect.width;
1217 mf->height = win->rect.height;
1218 mf->field = V4L2_FIELD_NONE;
1219 mf->colorspace = cfmt->colorspace;
1220 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
1221 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
1222 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
1223
1224 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1225 cfg->try_fmt = *mf;
1226 return 0;
1227 }
1228
1229 mutex_lock(&priv->lock);
1230
1231 if (priv->streaming) {
1232 ret = -EBUSY;
1233 goto error;
1234 }
1235
1236 /*
1237 * If the device is not powered up by the host driver do
1238 * not apply any changes to H/W at this time. Instead
1239 * the format will be restored right after power-up.
1240 */
1241 if (priv->power_count > 0) {
1242 ret = ov772x_set_params(priv, cfmt, win);
1243 if (ret < 0)
1244 goto error;
1245 }
1246 priv->win = win;
1247 priv->cfmt = cfmt;
1248
1249 error:
1250 mutex_unlock(&priv->lock);
1251
1252 return ret;
1253 }
1254
ov772x_video_probe(struct ov772x_priv * priv)1255 static int ov772x_video_probe(struct ov772x_priv *priv)
1256 {
1257 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
1258 int pid, ver, midh, midl;
1259 const char *devname;
1260 int ret;
1261
1262 ret = ov772x_power_on(priv);
1263 if (ret < 0)
1264 return ret;
1265
1266 /* Check and show product ID and manufacturer ID. */
1267 ret = regmap_read(priv->regmap, PID, &pid);
1268 if (ret < 0)
1269 return ret;
1270 ret = regmap_read(priv->regmap, VER, &ver);
1271 if (ret < 0)
1272 return ret;
1273
1274 switch (VERSION(pid, ver)) {
1275 case OV7720:
1276 devname = "ov7720";
1277 break;
1278 case OV7725:
1279 devname = "ov7725";
1280 break;
1281 default:
1282 dev_err(&client->dev,
1283 "Product ID error %x:%x\n", pid, ver);
1284 ret = -ENODEV;
1285 goto done;
1286 }
1287
1288 ret = regmap_read(priv->regmap, MIDH, &midh);
1289 if (ret < 0)
1290 return ret;
1291 ret = regmap_read(priv->regmap, MIDL, &midl);
1292 if (ret < 0)
1293 return ret;
1294
1295 dev_info(&client->dev,
1296 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
1297 devname, pid, ver, midh, midl);
1298
1299 ret = v4l2_ctrl_handler_setup(&priv->hdl);
1300
1301 done:
1302 ov772x_power_off(priv);
1303
1304 return ret;
1305 }
1306
1307 static const struct v4l2_ctrl_ops ov772x_ctrl_ops = {
1308 .s_ctrl = ov772x_s_ctrl,
1309 };
1310
1311 static const struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
1312 .log_status = v4l2_ctrl_subdev_log_status,
1313 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1314 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1315 #ifdef CONFIG_VIDEO_ADV_DEBUG
1316 .g_register = ov772x_g_register,
1317 .s_register = ov772x_s_register,
1318 #endif
1319 .s_power = ov772x_s_power,
1320 };
1321
ov772x_enum_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_interval_enum * fie)1322 static int ov772x_enum_frame_interval(struct v4l2_subdev *sd,
1323 struct v4l2_subdev_pad_config *cfg,
1324 struct v4l2_subdev_frame_interval_enum *fie)
1325 {
1326 if (fie->pad || fie->index >= ARRAY_SIZE(ov772x_frame_intervals))
1327 return -EINVAL;
1328
1329 if (fie->width != VGA_WIDTH && fie->width != QVGA_WIDTH)
1330 return -EINVAL;
1331 if (fie->height != VGA_HEIGHT && fie->height != QVGA_HEIGHT)
1332 return -EINVAL;
1333
1334 fie->interval.numerator = 1;
1335 fie->interval.denominator = ov772x_frame_intervals[fie->index];
1336
1337 return 0;
1338 }
1339
ov772x_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)1340 static int ov772x_enum_mbus_code(struct v4l2_subdev *sd,
1341 struct v4l2_subdev_pad_config *cfg,
1342 struct v4l2_subdev_mbus_code_enum *code)
1343 {
1344 if (code->pad || code->index >= ARRAY_SIZE(ov772x_cfmts))
1345 return -EINVAL;
1346
1347 code->code = ov772x_cfmts[code->index].code;
1348
1349 return 0;
1350 }
1351
1352 static const struct v4l2_subdev_video_ops ov772x_subdev_video_ops = {
1353 .s_stream = ov772x_s_stream,
1354 .s_frame_interval = ov772x_s_frame_interval,
1355 .g_frame_interval = ov772x_g_frame_interval,
1356 };
1357
1358 static const struct v4l2_subdev_pad_ops ov772x_subdev_pad_ops = {
1359 .enum_frame_interval = ov772x_enum_frame_interval,
1360 .enum_mbus_code = ov772x_enum_mbus_code,
1361 .get_selection = ov772x_get_selection,
1362 .get_fmt = ov772x_get_fmt,
1363 .set_fmt = ov772x_set_fmt,
1364 };
1365
1366 static const struct v4l2_subdev_ops ov772x_subdev_ops = {
1367 .core = &ov772x_subdev_core_ops,
1368 .video = &ov772x_subdev_video_ops,
1369 .pad = &ov772x_subdev_pad_ops,
1370 };
1371
ov772x_parse_dt(struct i2c_client * client,struct ov772x_priv * priv)1372 static int ov772x_parse_dt(struct i2c_client *client,
1373 struct ov772x_priv *priv)
1374 {
1375 struct v4l2_fwnode_endpoint bus_cfg = {
1376 .bus_type = V4L2_MBUS_PARALLEL
1377 };
1378 struct fwnode_handle *ep;
1379 int ret;
1380
1381 ep = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev), NULL);
1382 if (!ep) {
1383 dev_err(&client->dev, "Endpoint node not found\n");
1384 return -EINVAL;
1385 }
1386
1387 /*
1388 * For backward compatibility with older DTS where the
1389 * bus-type property was not mandatory, assume
1390 * V4L2_MBUS_PARALLEL as it was the only supported bus at the
1391 * time. v4l2_fwnode_endpoint_alloc_parse() will not fail if
1392 * 'bus-type' is not specified.
1393 */
1394 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1395 if (ret) {
1396 bus_cfg = (struct v4l2_fwnode_endpoint)
1397 { .bus_type = V4L2_MBUS_BT656 };
1398 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1399 if (ret)
1400 goto error_fwnode_put;
1401 }
1402
1403 priv->bus_type = bus_cfg.bus_type;
1404 v4l2_fwnode_endpoint_free(&bus_cfg);
1405
1406 error_fwnode_put:
1407 fwnode_handle_put(ep);
1408
1409 return ret;
1410 }
1411
1412 /*
1413 * i2c_driver function
1414 */
1415
ov772x_probe(struct i2c_client * client)1416 static int ov772x_probe(struct i2c_client *client)
1417 {
1418 struct ov772x_priv *priv;
1419 int ret;
1420 static const struct regmap_config ov772x_regmap_config = {
1421 .reg_bits = 8,
1422 .val_bits = 8,
1423 .max_register = DSPAUTO,
1424 };
1425
1426 if (!client->dev.of_node && !client->dev.platform_data) {
1427 dev_err(&client->dev,
1428 "Missing ov772x platform data for non-DT device\n");
1429 return -EINVAL;
1430 }
1431
1432 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1433 if (!priv)
1434 return -ENOMEM;
1435
1436 priv->regmap = devm_regmap_init_sccb(client, &ov772x_regmap_config);
1437 if (IS_ERR(priv->regmap)) {
1438 dev_err(&client->dev, "Failed to allocate register map\n");
1439 return PTR_ERR(priv->regmap);
1440 }
1441
1442 priv->info = client->dev.platform_data;
1443 mutex_init(&priv->lock);
1444
1445 v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
1446 priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1447 V4L2_SUBDEV_FL_HAS_EVENTS;
1448 v4l2_ctrl_handler_init(&priv->hdl, 3);
1449 /* Use our mutex for the controls */
1450 priv->hdl.lock = &priv->lock;
1451 priv->vflip_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1452 V4L2_CID_VFLIP, 0, 1, 1, 0);
1453 priv->hflip_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1454 V4L2_CID_HFLIP, 0, 1, 1, 0);
1455 priv->band_filter_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
1456 V4L2_CID_BAND_STOP_FILTER,
1457 0, 256, 1, 0);
1458 v4l2_ctrl_new_std_menu_items(&priv->hdl, &ov772x_ctrl_ops,
1459 V4L2_CID_TEST_PATTERN,
1460 ARRAY_SIZE(ov772x_test_pattern_menu) - 1,
1461 0, 0, ov772x_test_pattern_menu);
1462 priv->subdev.ctrl_handler = &priv->hdl;
1463 if (priv->hdl.error) {
1464 ret = priv->hdl.error;
1465 goto error_mutex_destroy;
1466 }
1467
1468 priv->clk = clk_get(&client->dev, NULL);
1469 if (IS_ERR(priv->clk)) {
1470 dev_err(&client->dev, "Unable to get xclk clock\n");
1471 ret = PTR_ERR(priv->clk);
1472 goto error_ctrl_free;
1473 }
1474
1475 priv->pwdn_gpio = gpiod_get_optional(&client->dev, "powerdown",
1476 GPIOD_OUT_LOW);
1477 if (IS_ERR(priv->pwdn_gpio)) {
1478 dev_info(&client->dev, "Unable to get GPIO \"powerdown\"");
1479 ret = PTR_ERR(priv->pwdn_gpio);
1480 goto error_clk_put;
1481 }
1482
1483 ret = ov772x_parse_dt(client, priv);
1484 if (ret)
1485 goto error_clk_put;
1486
1487 ret = ov772x_video_probe(priv);
1488 if (ret < 0)
1489 goto error_gpio_put;
1490
1491 #ifdef CONFIG_MEDIA_CONTROLLER
1492 priv->pad.flags = MEDIA_PAD_FL_SOURCE;
1493 priv->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1494 ret = media_entity_pads_init(&priv->subdev.entity, 1, &priv->pad);
1495 if (ret < 0)
1496 goto error_gpio_put;
1497 #endif
1498
1499 priv->cfmt = &ov772x_cfmts[0];
1500 priv->win = &ov772x_win_sizes[0];
1501 priv->fps = 15;
1502
1503 ret = v4l2_async_register_subdev(&priv->subdev);
1504 if (ret)
1505 goto error_entity_cleanup;
1506
1507 return 0;
1508
1509 error_entity_cleanup:
1510 media_entity_cleanup(&priv->subdev.entity);
1511 error_gpio_put:
1512 if (priv->pwdn_gpio)
1513 gpiod_put(priv->pwdn_gpio);
1514 error_clk_put:
1515 clk_put(priv->clk);
1516 error_ctrl_free:
1517 v4l2_ctrl_handler_free(&priv->hdl);
1518 error_mutex_destroy:
1519 mutex_destroy(&priv->lock);
1520
1521 return ret;
1522 }
1523
ov772x_remove(struct i2c_client * client)1524 static int ov772x_remove(struct i2c_client *client)
1525 {
1526 struct ov772x_priv *priv = to_ov772x(i2c_get_clientdata(client));
1527
1528 media_entity_cleanup(&priv->subdev.entity);
1529 clk_put(priv->clk);
1530 if (priv->pwdn_gpio)
1531 gpiod_put(priv->pwdn_gpio);
1532 v4l2_async_unregister_subdev(&priv->subdev);
1533 v4l2_ctrl_handler_free(&priv->hdl);
1534 mutex_destroy(&priv->lock);
1535
1536 return 0;
1537 }
1538
1539 static const struct i2c_device_id ov772x_id[] = {
1540 { "ov772x", 0 },
1541 { }
1542 };
1543 MODULE_DEVICE_TABLE(i2c, ov772x_id);
1544
1545 static const struct of_device_id ov772x_of_match[] = {
1546 { .compatible = "ovti,ov7725", },
1547 { .compatible = "ovti,ov7720", },
1548 { /* sentinel */ },
1549 };
1550 MODULE_DEVICE_TABLE(of, ov772x_of_match);
1551
1552 static struct i2c_driver ov772x_i2c_driver = {
1553 .driver = {
1554 .name = "ov772x",
1555 .of_match_table = ov772x_of_match,
1556 },
1557 .probe_new = ov772x_probe,
1558 .remove = ov772x_remove,
1559 .id_table = ov772x_id,
1560 };
1561
1562 module_i2c_driver(ov772x_i2c_driver);
1563
1564 MODULE_DESCRIPTION("V4L2 driver for OV772x image sensor");
1565 MODULE_AUTHOR("Kuninori Morimoto");
1566 MODULE_LICENSE("GPL v2");
1567