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_state * sd_state,struct v4l2_subdev_selection * sel)1159 static int ov772x_get_selection(struct v4l2_subdev *sd,
1160 				struct v4l2_subdev_state *sd_state,
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_state * sd_state,struct v4l2_subdev_format * format)1181 static int ov772x_get_fmt(struct v4l2_subdev *sd,
1182 			  struct v4l2_subdev_state *sd_state,
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_state * sd_state,struct v4l2_subdev_format * format)1200 static int ov772x_set_fmt(struct v4l2_subdev *sd,
1201 			  struct v4l2_subdev_state *sd_state,
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 		sd_state->pads->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_state * sd_state,struct v4l2_subdev_frame_interval_enum * fie)1322 static int ov772x_enum_frame_interval(struct v4l2_subdev *sd,
1323 				      struct v4l2_subdev_state *sd_state,
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_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1340 static int ov772x_enum_mbus_code(struct v4l2_subdev *sd,
1341 				 struct v4l2_subdev_state *sd_state,
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 void 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 
1537 static const struct i2c_device_id ov772x_id[] = {
1538 	{ "ov772x", 0 },
1539 	{ }
1540 };
1541 MODULE_DEVICE_TABLE(i2c, ov772x_id);
1542 
1543 static const struct of_device_id ov772x_of_match[] = {
1544 	{ .compatible = "ovti,ov7725", },
1545 	{ .compatible = "ovti,ov7720", },
1546 	{ /* sentinel */ },
1547 };
1548 MODULE_DEVICE_TABLE(of, ov772x_of_match);
1549 
1550 static struct i2c_driver ov772x_i2c_driver = {
1551 	.driver = {
1552 		.name = "ov772x",
1553 		.of_match_table = ov772x_of_match,
1554 	},
1555 	.probe_new = ov772x_probe,
1556 	.remove   = ov772x_remove,
1557 	.id_table = ov772x_id,
1558 };
1559 
1560 module_i2c_driver(ov772x_i2c_driver);
1561 
1562 MODULE_DESCRIPTION("V4L2 driver for OV772x image sensor");
1563 MODULE_AUTHOR("Kuninori Morimoto");
1564 MODULE_LICENSE("GPL v2");
1565