1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Omnivision OV9650/OV9652 CMOS Image Sensor driver
4 *
5 * Copyright (C) 2013, Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
6 *
7 * Register definitions and initial settings based on a driver written
8 * by Vladimir Fonov.
9 * Copyright (c) 2010, Vladimir Fonov
10 */
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/i2c.h>
15 #include <linux/kernel.h>
16 #include <linux/media.h>
17 #include <linux/module.h>
18 #include <linux/ratelimit.h>
19 #include <linux/regmap.h>
20 #include <linux/slab.h>
21 #include <linux/string.h>
22 #include <linux/videodev2.h>
23
24 #include <media/media-entity.h>
25 #include <media/v4l2-async.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-event.h>
29 #include <media/v4l2-image-sizes.h>
30 #include <media/v4l2-subdev.h>
31 #include <media/v4l2-mediabus.h>
32
33 static int debug;
34 module_param(debug, int, 0644);
35 MODULE_PARM_DESC(debug, "Debug level (0-2)");
36
37 #define DRIVER_NAME "OV9650"
38
39 /*
40 * OV9650/OV9652 register definitions
41 */
42 #define REG_GAIN 0x00 /* Gain control, AGC[7:0] */
43 #define REG_BLUE 0x01 /* AWB - Blue channel gain */
44 #define REG_RED 0x02 /* AWB - Red channel gain */
45 #define REG_VREF 0x03 /* [7:6] - AGC[9:8], [5:3]/[2:0] */
46 #define VREF_GAIN_MASK 0xc0 /* - VREF end/start low 3 bits */
47 #define REG_COM1 0x04
48 #define COM1_CCIR656 0x40
49 #define REG_B_AVE 0x05
50 #define REG_GB_AVE 0x06
51 #define REG_GR_AVE 0x07
52 #define REG_R_AVE 0x08
53 #define REG_COM2 0x09
54 #define REG_PID 0x0a /* Product ID MSB */
55 #define REG_VER 0x0b /* Product ID LSB */
56 #define REG_COM3 0x0c
57 #define COM3_SWAP 0x40
58 #define COM3_VARIOPIXEL1 0x04
59 #define REG_COM4 0x0d /* Vario Pixels */
60 #define COM4_VARIOPIXEL2 0x80
61 #define REG_COM5 0x0e /* System clock options */
62 #define COM5_SLAVE_MODE 0x10
63 #define COM5_SYSTEMCLOCK48MHZ 0x80
64 #define REG_COM6 0x0f /* HREF & ADBLC options */
65 #define REG_AECH 0x10 /* Exposure value, AEC[9:2] */
66 #define REG_CLKRC 0x11 /* Clock control */
67 #define CLK_EXT 0x40 /* Use external clock directly */
68 #define CLK_SCALE 0x3f /* Mask for internal clock scale */
69 #define REG_COM7 0x12 /* SCCB reset, output format */
70 #define COM7_RESET 0x80
71 #define COM7_FMT_MASK 0x38
72 #define COM7_FMT_VGA 0x40
73 #define COM7_FMT_CIF 0x20
74 #define COM7_FMT_QVGA 0x10
75 #define COM7_FMT_QCIF 0x08
76 #define COM7_RGB 0x04
77 #define COM7_YUV 0x00
78 #define COM7_BAYER 0x01
79 #define COM7_PBAYER 0x05
80 #define REG_COM8 0x13 /* AGC/AEC options */
81 #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */
82 #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */
83 #define COM8_BFILT 0x20 /* Band filter enable */
84 #define COM8_AGC 0x04 /* Auto gain enable */
85 #define COM8_AWB 0x02 /* White balance enable */
86 #define COM8_AEC 0x01 /* Auto exposure enable */
87 #define REG_COM9 0x14 /* Gain ceiling */
88 #define COM9_GAIN_CEIL_MASK 0x70 /* */
89 #define REG_COM10 0x15 /* PCLK, HREF, HSYNC signals polarity */
90 #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */
91 #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */
92 #define COM10_HREF_REV 0x08 /* Reverse HREF */
93 #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */
94 #define COM10_VS_NEG 0x02 /* VSYNC negative */
95 #define COM10_HS_NEG 0x01 /* HSYNC negative */
96 #define REG_HSTART 0x17 /* Horiz start high bits */
97 #define REG_HSTOP 0x18 /* Horiz stop high bits */
98 #define REG_VSTART 0x19 /* Vert start high bits */
99 #define REG_VSTOP 0x1a /* Vert stop high bits */
100 #define REG_PSHFT 0x1b /* Pixel delay after HREF */
101 #define REG_MIDH 0x1c /* Manufacturer ID MSB */
102 #define REG_MIDL 0x1d /* Manufufacturer ID LSB */
103 #define REG_MVFP 0x1e /* Image mirror/flip */
104 #define MVFP_MIRROR 0x20 /* Mirror image */
105 #define MVFP_FLIP 0x10 /* Vertical flip */
106 #define REG_BOS 0x20 /* B channel Offset */
107 #define REG_GBOS 0x21 /* Gb channel Offset */
108 #define REG_GROS 0x22 /* Gr channel Offset */
109 #define REG_ROS 0x23 /* R channel Offset */
110 #define REG_AEW 0x24 /* AGC upper limit */
111 #define REG_AEB 0x25 /* AGC lower limit */
112 #define REG_VPT 0x26 /* AGC/AEC fast mode op region */
113 #define REG_BBIAS 0x27 /* B channel output bias */
114 #define REG_GBBIAS 0x28 /* Gb channel output bias */
115 #define REG_GRCOM 0x29 /* Analog BLC & regulator */
116 #define REG_EXHCH 0x2a /* Dummy pixel insert MSB */
117 #define REG_EXHCL 0x2b /* Dummy pixel insert LSB */
118 #define REG_RBIAS 0x2c /* R channel output bias */
119 #define REG_ADVFL 0x2d /* LSB of dummy line insert */
120 #define REG_ADVFH 0x2e /* MSB of dummy line insert */
121 #define REG_YAVE 0x2f /* Y/G channel average value */
122 #define REG_HSYST 0x30 /* HSYNC rising edge delay LSB*/
123 #define REG_HSYEN 0x31 /* HSYNC falling edge delay LSB*/
124 #define REG_HREF 0x32 /* HREF pieces */
125 #define REG_CHLF 0x33 /* reserved */
126 #define REG_ADC 0x37 /* reserved */
127 #define REG_ACOM 0x38 /* reserved */
128 #define REG_OFON 0x39 /* Power down register */
129 #define OFON_PWRDN 0x08 /* Power down bit */
130 #define REG_TSLB 0x3a /* YUVU format */
131 #define TSLB_YUYV_MASK 0x0c /* UYVY or VYUY - see com13 */
132 #define REG_COM11 0x3b /* Night mode, banding filter enable */
133 #define COM11_NIGHT 0x80 /* Night mode enable */
134 #define COM11_NMFR 0x60 /* Two bit NM frame rate */
135 #define COM11_BANDING 0x01 /* Banding filter */
136 #define COM11_AEC_REF_MASK 0x18 /* AEC reference area selection */
137 #define REG_COM12 0x3c /* HREF option, UV average */
138 #define COM12_HREF 0x80 /* HREF always */
139 #define REG_COM13 0x3d /* Gamma selection, Color matrix en. */
140 #define COM13_GAMMA 0x80 /* Gamma enable */
141 #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */
142 #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */
143 #define REG_COM14 0x3e /* Edge enhancement options */
144 #define COM14_EDGE_EN 0x02
145 #define COM14_EEF_X2 0x01
146 #define REG_EDGE 0x3f /* Edge enhancement factor */
147 #define EDGE_FACTOR_MASK 0x0f
148 #define REG_COM15 0x40 /* Output range, RGB 555/565 */
149 #define COM15_R10F0 0x00 /* Data range 10 to F0 */
150 #define COM15_R01FE 0x80 /* 01 to FE */
151 #define COM15_R00FF 0xc0 /* 00 to FF */
152 #define COM15_RGB565 0x10 /* RGB565 output */
153 #define COM15_RGB555 0x30 /* RGB555 output */
154 #define COM15_SWAPRB 0x04 /* Swap R&B */
155 #define REG_COM16 0x41 /* Color matrix coeff options */
156 #define REG_COM17 0x42 /* Single frame out, banding filter */
157 /* n = 1...9, 0x4f..0x57 */
158 #define REG_MTX(__n) (0x4f + (__n) - 1)
159 #define REG_MTXS 0x58
160 /* Lens Correction Option 1...5, __n = 0...5 */
161 #define REG_LCC(__n) (0x62 + (__n) - 1)
162 #define LCC5_LCC_ENABLE 0x01 /* LCC5, enable lens correction */
163 #define LCC5_LCC_COLOR 0x04
164 #define REG_MANU 0x67 /* Manual U value */
165 #define REG_MANV 0x68 /* Manual V value */
166 #define REG_HV 0x69 /* Manual banding filter MSB */
167 #define REG_MBD 0x6a /* Manual banding filter value */
168 #define REG_DBLV 0x6b /* reserved */
169 #define REG_GSP 0x6c /* Gamma curve */
170 #define GSP_LEN 15
171 #define REG_GST 0x7c /* Gamma curve */
172 #define GST_LEN 15
173 #define REG_COM21 0x8b
174 #define REG_COM22 0x8c /* Edge enhancement, denoising */
175 #define COM22_WHTPCOR 0x02 /* White pixel correction enable */
176 #define COM22_WHTPCOROPT 0x01 /* White pixel correction option */
177 #define COM22_DENOISE 0x10 /* White pixel correction option */
178 #define REG_COM23 0x8d /* Color bar test, color gain */
179 #define COM23_TEST_MODE 0x10
180 #define REG_DBLC1 0x8f /* Digital BLC */
181 #define REG_DBLC_B 0x90 /* Digital BLC B channel offset */
182 #define REG_DBLC_R 0x91 /* Digital BLC R channel offset */
183 #define REG_DM_LNL 0x92 /* Dummy line low 8 bits */
184 #define REG_DM_LNH 0x93 /* Dummy line high 8 bits */
185 #define REG_LCCFB 0x9d /* Lens Correction B channel */
186 #define REG_LCCFR 0x9e /* Lens Correction R channel */
187 #define REG_DBLC_GB 0x9f /* Digital BLC GB chan offset */
188 #define REG_DBLC_GR 0xa0 /* Digital BLC GR chan offset */
189 #define REG_AECHM 0xa1 /* Exposure value - bits AEC[15:10] */
190 #define REG_BD50ST 0xa2 /* Banding filter value for 50Hz */
191 #define REG_BD60ST 0xa3 /* Banding filter value for 60Hz */
192 #define REG_NULL 0xff /* Array end token */
193
194 #define DEF_CLKRC 0x80
195
196 #define OV965X_ID(_msb, _lsb) ((_msb) << 8 | (_lsb))
197 #define OV9650_ID 0x9650
198 #define OV9652_ID 0x9652
199
200 struct ov965x_ctrls {
201 struct v4l2_ctrl_handler handler;
202 struct {
203 struct v4l2_ctrl *auto_exp;
204 struct v4l2_ctrl *exposure;
205 };
206 struct {
207 struct v4l2_ctrl *auto_wb;
208 struct v4l2_ctrl *blue_balance;
209 struct v4l2_ctrl *red_balance;
210 };
211 struct {
212 struct v4l2_ctrl *hflip;
213 struct v4l2_ctrl *vflip;
214 };
215 struct {
216 struct v4l2_ctrl *auto_gain;
217 struct v4l2_ctrl *gain;
218 };
219 struct v4l2_ctrl *brightness;
220 struct v4l2_ctrl *saturation;
221 struct v4l2_ctrl *sharpness;
222 struct v4l2_ctrl *light_freq;
223 u8 update;
224 };
225
226 struct ov965x_framesize {
227 u16 width;
228 u16 height;
229 u16 max_exp_lines;
230 const u8 *regs;
231 };
232
233 struct ov965x_interval {
234 struct v4l2_fract interval;
235 /* Maximum resolution for this interval */
236 struct v4l2_frmsize_discrete size;
237 u8 clkrc_div;
238 };
239
240 enum gpio_id {
241 GPIO_PWDN,
242 GPIO_RST,
243 NUM_GPIOS,
244 };
245
246 struct ov965x {
247 struct v4l2_subdev sd;
248 struct media_pad pad;
249 enum v4l2_mbus_type bus_type;
250 struct gpio_desc *gpios[NUM_GPIOS];
251 /* External master clock frequency */
252 unsigned long mclk_frequency;
253 struct clk *clk;
254
255 /* Protects the struct fields below */
256 struct mutex lock;
257
258 struct regmap *regmap;
259
260 /* Exposure row interval in us */
261 unsigned int exp_row_interval;
262
263 unsigned short id;
264 const struct ov965x_framesize *frame_size;
265 /* YUYV sequence (pixel format) control register */
266 u8 tslb_reg;
267 struct v4l2_mbus_framefmt format;
268
269 struct ov965x_ctrls ctrls;
270 /* Pointer to frame rate control data structure */
271 const struct ov965x_interval *fiv;
272
273 int streaming;
274 int power;
275
276 u8 apply_frame_fmt;
277 };
278
279 struct i2c_rv {
280 u8 addr;
281 u8 value;
282 };
283
284 static const struct i2c_rv ov965x_init_regs[] = {
285 { REG_COM2, 0x10 }, /* Set soft sleep mode */
286 { REG_COM5, 0x00 }, /* System clock options */
287 { REG_COM2, 0x01 }, /* Output drive, soft sleep mode */
288 { REG_COM10, 0x00 }, /* Slave mode, HREF vs HSYNC, signals negate */
289 { REG_EDGE, 0xa6 }, /* Edge enhancement treshhold and factor */
290 { REG_COM16, 0x02 }, /* Color matrix coeff double option */
291 { REG_COM17, 0x08 }, /* Single frame out, banding filter */
292 { 0x16, 0x06 },
293 { REG_CHLF, 0xc0 }, /* Reserved */
294 { 0x34, 0xbf },
295 { 0xa8, 0x80 },
296 { 0x96, 0x04 },
297 { 0x8e, 0x00 },
298 { REG_COM12, 0x77 }, /* HREF option, UV average */
299 { 0x8b, 0x06 },
300 { 0x35, 0x91 },
301 { 0x94, 0x88 },
302 { 0x95, 0x88 },
303 { REG_COM15, 0xc1 }, /* Output range, RGB 555/565 */
304 { REG_GRCOM, 0x2f }, /* Analog BLC & regulator */
305 { REG_COM6, 0x43 }, /* HREF & ADBLC options */
306 { REG_COM8, 0xe5 }, /* AGC/AEC options */
307 { REG_COM13, 0x90 }, /* Gamma selection, colour matrix, UV delay */
308 { REG_HV, 0x80 }, /* Manual banding filter MSB */
309 { 0x5c, 0x96 }, /* Reserved up to 0xa5 */
310 { 0x5d, 0x96 },
311 { 0x5e, 0x10 },
312 { 0x59, 0xeb },
313 { 0x5a, 0x9c },
314 { 0x5b, 0x55 },
315 { 0x43, 0xf0 },
316 { 0x44, 0x10 },
317 { 0x45, 0x55 },
318 { 0x46, 0x86 },
319 { 0x47, 0x64 },
320 { 0x48, 0x86 },
321 { 0x5f, 0xe0 },
322 { 0x60, 0x8c },
323 { 0x61, 0x20 },
324 { 0xa5, 0xd9 },
325 { 0xa4, 0x74 }, /* reserved */
326 { REG_COM23, 0x02 }, /* Color gain analog/_digital_ */
327 { REG_COM8, 0xe7 }, /* Enable AEC, AWB, AEC */
328 { REG_COM22, 0x23 }, /* Edge enhancement, denoising */
329 { 0xa9, 0xb8 },
330 { 0xaa, 0x92 },
331 { 0xab, 0x0a },
332 { REG_DBLC1, 0xdf }, /* Digital BLC */
333 { REG_DBLC_B, 0x00 }, /* Digital BLC B chan offset */
334 { REG_DBLC_R, 0x00 }, /* Digital BLC R chan offset */
335 { REG_DBLC_GB, 0x00 }, /* Digital BLC GB chan offset */
336 { REG_DBLC_GR, 0x00 },
337 { REG_COM9, 0x3a }, /* Gain ceiling 16x */
338 { REG_NULL, 0 }
339 };
340
341 #define NUM_FMT_REGS 14
342 /*
343 * COM7, COM3, COM4, HSTART, HSTOP, HREF, VSTART, VSTOP, VREF,
344 * EXHCH, EXHCL, ADC, OCOM, OFON
345 */
346 static const u8 frame_size_reg_addr[NUM_FMT_REGS] = {
347 0x12, 0x0c, 0x0d, 0x17, 0x18, 0x32, 0x19, 0x1a, 0x03,
348 0x2a, 0x2b, 0x37, 0x38, 0x39,
349 };
350
351 static const u8 ov965x_sxga_regs[NUM_FMT_REGS] = {
352 0x00, 0x00, 0x00, 0x1e, 0xbe, 0xbf, 0x01, 0x81, 0x12,
353 0x10, 0x34, 0x81, 0x93, 0x51,
354 };
355
356 static const u8 ov965x_vga_regs[NUM_FMT_REGS] = {
357 0x40, 0x04, 0x80, 0x26, 0xc6, 0xed, 0x01, 0x3d, 0x00,
358 0x10, 0x40, 0x91, 0x12, 0x43,
359 };
360
361 /* Determined empirically. */
362 static const u8 ov965x_qvga_regs[NUM_FMT_REGS] = {
363 0x10, 0x04, 0x80, 0x25, 0xc5, 0xbf, 0x00, 0x80, 0x12,
364 0x10, 0x40, 0x91, 0x12, 0x43,
365 };
366
367 static const struct ov965x_framesize ov965x_framesizes[] = {
368 {
369 .width = SXGA_WIDTH,
370 .height = SXGA_HEIGHT,
371 .regs = ov965x_sxga_regs,
372 .max_exp_lines = 1048,
373 }, {
374 .width = VGA_WIDTH,
375 .height = VGA_HEIGHT,
376 .regs = ov965x_vga_regs,
377 .max_exp_lines = 498,
378 }, {
379 .width = QVGA_WIDTH,
380 .height = QVGA_HEIGHT,
381 .regs = ov965x_qvga_regs,
382 .max_exp_lines = 248,
383 },
384 };
385
386 struct ov965x_pixfmt {
387 u32 code;
388 u32 colorspace;
389 /* REG_TSLB value, only bits [3:2] may be set. */
390 u8 tslb_reg;
391 };
392
393 static const struct ov965x_pixfmt ov965x_formats[] = {
394 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG, 0x00},
395 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG, 0x04},
396 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG, 0x0c},
397 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG, 0x08},
398 };
399
400 /*
401 * This table specifies possible frame resolution and interval
402 * combinations. Default CLKRC[5:0] divider values are valid
403 * only for 24 MHz external clock frequency.
404 */
405 static struct ov965x_interval ov965x_intervals[] = {
406 {{ 100, 625 }, { SXGA_WIDTH, SXGA_HEIGHT }, 0 }, /* 6.25 fps */
407 {{ 10, 125 }, { VGA_WIDTH, VGA_HEIGHT }, 1 }, /* 12.5 fps */
408 {{ 10, 125 }, { QVGA_WIDTH, QVGA_HEIGHT }, 3 }, /* 12.5 fps */
409 {{ 1, 25 }, { VGA_WIDTH, VGA_HEIGHT }, 0 }, /* 25 fps */
410 {{ 1, 25 }, { QVGA_WIDTH, QVGA_HEIGHT }, 1 }, /* 25 fps */
411 };
412
ctrl_to_sd(struct v4l2_ctrl * ctrl)413 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
414 {
415 return &container_of(ctrl->handler, struct ov965x, ctrls.handler)->sd;
416 }
417
to_ov965x(struct v4l2_subdev * sd)418 static inline struct ov965x *to_ov965x(struct v4l2_subdev *sd)
419 {
420 return container_of(sd, struct ov965x, sd);
421 }
422
ov965x_read(struct ov965x * ov965x,u8 addr,u8 * val)423 static int ov965x_read(struct ov965x *ov965x, u8 addr, u8 *val)
424 {
425 int ret;
426 unsigned int buf;
427
428 ret = regmap_read(ov965x->regmap, addr, &buf);
429 if (!ret)
430 *val = buf;
431 else
432 *val = -1;
433
434 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02x. (%d)\n",
435 __func__, *val, addr, ret);
436
437 return ret;
438 }
439
ov965x_write(struct ov965x * ov965x,u8 addr,u8 val)440 static int ov965x_write(struct ov965x *ov965x, u8 addr, u8 val)
441 {
442 int ret;
443
444 ret = regmap_write(ov965x->regmap, addr, val);
445
446 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02X (%d)\n",
447 __func__, val, addr, ret);
448
449 return ret;
450 }
451
ov965x_write_array(struct ov965x * ov965x,const struct i2c_rv * regs)452 static int ov965x_write_array(struct ov965x *ov965x,
453 const struct i2c_rv *regs)
454 {
455 int i, ret = 0;
456
457 for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
458 ret = ov965x_write(ov965x, regs[i].addr, regs[i].value);
459
460 return ret;
461 }
462
ov965x_set_default_gamma_curve(struct ov965x * ov965x)463 static int ov965x_set_default_gamma_curve(struct ov965x *ov965x)
464 {
465 static const u8 gamma_curve[] = {
466 /* Values taken from OV application note. */
467 0x40, 0x30, 0x4b, 0x60, 0x70, 0x70, 0x70, 0x70,
468 0x60, 0x60, 0x50, 0x48, 0x3a, 0x2e, 0x28, 0x22,
469 0x04, 0x07, 0x10, 0x28, 0x36, 0x44, 0x52, 0x60,
470 0x6c, 0x78, 0x8c, 0x9e, 0xbb, 0xd2, 0xe6
471 };
472 u8 addr = REG_GSP;
473 unsigned int i;
474
475 for (i = 0; i < ARRAY_SIZE(gamma_curve); i++) {
476 int ret = ov965x_write(ov965x, addr, gamma_curve[i]);
477
478 if (ret < 0)
479 return ret;
480 addr++;
481 }
482
483 return 0;
484 };
485
ov965x_set_color_matrix(struct ov965x * ov965x)486 static int ov965x_set_color_matrix(struct ov965x *ov965x)
487 {
488 static const u8 mtx[] = {
489 /* MTX1..MTX9, MTXS */
490 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38, 0x40, 0x40, 0x40, 0x0d
491 };
492 u8 addr = REG_MTX(1);
493 unsigned int i;
494
495 for (i = 0; i < ARRAY_SIZE(mtx); i++) {
496 int ret = ov965x_write(ov965x, addr, mtx[i]);
497
498 if (ret < 0)
499 return ret;
500 addr++;
501 }
502
503 return 0;
504 }
505
__ov965x_set_power(struct ov965x * ov965x,int on)506 static int __ov965x_set_power(struct ov965x *ov965x, int on)
507 {
508 if (on) {
509 int ret = clk_prepare_enable(ov965x->clk);
510
511 if (ret)
512 return ret;
513
514 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 0);
515 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 0);
516 msleep(25);
517 } else {
518 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 1);
519 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 1);
520
521 clk_disable_unprepare(ov965x->clk);
522 }
523
524 ov965x->streaming = 0;
525
526 return 0;
527 }
528
ov965x_s_power(struct v4l2_subdev * sd,int on)529 static int ov965x_s_power(struct v4l2_subdev *sd, int on)
530 {
531 struct ov965x *ov965x = to_ov965x(sd);
532 int ret = 0;
533
534 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on);
535
536 mutex_lock(&ov965x->lock);
537 if (ov965x->power == !on) {
538 ret = __ov965x_set_power(ov965x, on);
539 if (!ret && on) {
540 ret = ov965x_write_array(ov965x,
541 ov965x_init_regs);
542 ov965x->apply_frame_fmt = 1;
543 ov965x->ctrls.update = 1;
544 }
545 }
546 if (!ret)
547 ov965x->power += on ? 1 : -1;
548
549 WARN_ON(ov965x->power < 0);
550 mutex_unlock(&ov965x->lock);
551 return ret;
552 }
553
554 /*
555 * V4L2 controls
556 */
557
ov965x_update_exposure_ctrl(struct ov965x * ov965x)558 static void ov965x_update_exposure_ctrl(struct ov965x *ov965x)
559 {
560 struct v4l2_ctrl *ctrl = ov965x->ctrls.exposure;
561 unsigned long fint, trow;
562 int min, max, def;
563 u8 clkrc;
564
565 mutex_lock(&ov965x->lock);
566 if (WARN_ON(!ctrl || !ov965x->frame_size)) {
567 mutex_unlock(&ov965x->lock);
568 return;
569 }
570 clkrc = DEF_CLKRC + ov965x->fiv->clkrc_div;
571 /* Calculate internal clock frequency */
572 fint = ov965x->mclk_frequency * ((clkrc >> 7) + 1) /
573 ((2 * ((clkrc & 0x3f) + 1)));
574 /* and the row interval (in us). */
575 trow = (2 * 1520 * 1000000UL) / fint;
576 max = ov965x->frame_size->max_exp_lines * trow;
577 ov965x->exp_row_interval = trow;
578 mutex_unlock(&ov965x->lock);
579
580 v4l2_dbg(1, debug, &ov965x->sd, "clkrc: %#x, fi: %lu, tr: %lu, %d\n",
581 clkrc, fint, trow, max);
582
583 /* Update exposure time range to match current frame format. */
584 min = (trow + 100) / 100;
585 max = (max - 100) / 100;
586 def = min + (max - min) / 2;
587
588 if (v4l2_ctrl_modify_range(ctrl, min, max, 1, def))
589 v4l2_err(&ov965x->sd, "Exposure ctrl range update failed\n");
590 }
591
ov965x_set_banding_filter(struct ov965x * ov965x,int value)592 static int ov965x_set_banding_filter(struct ov965x *ov965x, int value)
593 {
594 unsigned long mbd, light_freq;
595 int ret;
596 u8 reg;
597
598 ret = ov965x_read(ov965x, REG_COM8, ®);
599 if (!ret) {
600 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED)
601 reg &= ~COM8_BFILT;
602 else
603 reg |= COM8_BFILT;
604 ret = ov965x_write(ov965x, REG_COM8, reg);
605 }
606 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED)
607 return 0;
608 if (WARN_ON(!ov965x->fiv))
609 return -EINVAL;
610 /* Set minimal exposure time for 50/60 HZ lighting */
611 if (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ)
612 light_freq = 50;
613 else
614 light_freq = 60;
615 mbd = (1000UL * ov965x->fiv->interval.denominator *
616 ov965x->frame_size->max_exp_lines) /
617 ov965x->fiv->interval.numerator;
618 mbd = ((mbd / (light_freq * 2)) + 500) / 1000UL;
619
620 return ov965x_write(ov965x, REG_MBD, mbd);
621 }
622
ov965x_set_white_balance(struct ov965x * ov965x,int awb)623 static int ov965x_set_white_balance(struct ov965x *ov965x, int awb)
624 {
625 int ret;
626 u8 reg;
627
628 ret = ov965x_read(ov965x, REG_COM8, ®);
629 if (!ret) {
630 reg = awb ? reg | REG_COM8 : reg & ~REG_COM8;
631 ret = ov965x_write(ov965x, REG_COM8, reg);
632 }
633 if (!ret && !awb) {
634 ret = ov965x_write(ov965x, REG_BLUE,
635 ov965x->ctrls.blue_balance->val);
636 if (ret < 0)
637 return ret;
638 ret = ov965x_write(ov965x, REG_RED,
639 ov965x->ctrls.red_balance->val);
640 }
641 return ret;
642 }
643
644 #define NUM_BR_LEVELS 7
645 #define NUM_BR_REGS 3
646
ov965x_set_brightness(struct ov965x * ov965x,int val)647 static int ov965x_set_brightness(struct ov965x *ov965x, int val)
648 {
649 static const u8 regs[NUM_BR_LEVELS + 1][NUM_BR_REGS] = {
650 { REG_AEW, REG_AEB, REG_VPT },
651 { 0x1c, 0x12, 0x50 }, /* -3 */
652 { 0x3d, 0x30, 0x71 }, /* -2 */
653 { 0x50, 0x44, 0x92 }, /* -1 */
654 { 0x70, 0x64, 0xc3 }, /* 0 */
655 { 0x90, 0x84, 0xd4 }, /* +1 */
656 { 0xc4, 0xbf, 0xf9 }, /* +2 */
657 { 0xd8, 0xd0, 0xfa }, /* +3 */
658 };
659 int i, ret = 0;
660
661 val += (NUM_BR_LEVELS / 2 + 1);
662 if (val > NUM_BR_LEVELS)
663 return -EINVAL;
664
665 for (i = 0; i < NUM_BR_REGS && !ret; i++)
666 ret = ov965x_write(ov965x, regs[0][i],
667 regs[val][i]);
668 return ret;
669 }
670
ov965x_set_gain(struct ov965x * ov965x,int auto_gain)671 static int ov965x_set_gain(struct ov965x *ov965x, int auto_gain)
672 {
673 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
674 int ret = 0;
675 u8 reg;
676 /*
677 * For manual mode we need to disable AGC first, so
678 * gain value in REG_VREF, REG_GAIN is not overwritten.
679 */
680 if (ctrls->auto_gain->is_new) {
681 ret = ov965x_read(ov965x, REG_COM8, ®);
682 if (ret < 0)
683 return ret;
684 if (ctrls->auto_gain->val)
685 reg |= COM8_AGC;
686 else
687 reg &= ~COM8_AGC;
688 ret = ov965x_write(ov965x, REG_COM8, reg);
689 if (ret < 0)
690 return ret;
691 }
692
693 if (ctrls->gain->is_new && !auto_gain) {
694 unsigned int gain = ctrls->gain->val;
695 unsigned int rgain;
696 int m;
697 /*
698 * Convert gain control value to the sensor's gain
699 * registers (VREF[7:6], GAIN[7:0]) format.
700 */
701 for (m = 6; m >= 0; m--)
702 if (gain >= (1 << m) * 16)
703 break;
704
705 /* Sanity check: don't adjust the gain with a negative value */
706 if (m < 0)
707 return -EINVAL;
708
709 rgain = (gain - ((1 << m) * 16)) / (1 << m);
710 rgain |= (((1 << m) - 1) << 4);
711
712 ret = ov965x_write(ov965x, REG_GAIN, rgain & 0xff);
713 if (ret < 0)
714 return ret;
715 ret = ov965x_read(ov965x, REG_VREF, ®);
716 if (ret < 0)
717 return ret;
718 reg &= ~VREF_GAIN_MASK;
719 reg |= (((rgain >> 8) & 0x3) << 6);
720 ret = ov965x_write(ov965x, REG_VREF, reg);
721 if (ret < 0)
722 return ret;
723 /* Return updated control's value to userspace */
724 ctrls->gain->val = (1 << m) * (16 + (rgain & 0xf));
725 }
726
727 return ret;
728 }
729
ov965x_set_sharpness(struct ov965x * ov965x,unsigned int value)730 static int ov965x_set_sharpness(struct ov965x *ov965x, unsigned int value)
731 {
732 u8 com14, edge;
733 int ret;
734
735 ret = ov965x_read(ov965x, REG_COM14, &com14);
736 if (ret < 0)
737 return ret;
738 ret = ov965x_read(ov965x, REG_EDGE, &edge);
739 if (ret < 0)
740 return ret;
741 com14 = value ? com14 | COM14_EDGE_EN : com14 & ~COM14_EDGE_EN;
742 value--;
743 if (value > 0x0f) {
744 com14 |= COM14_EEF_X2;
745 value >>= 1;
746 } else {
747 com14 &= ~COM14_EEF_X2;
748 }
749 ret = ov965x_write(ov965x, REG_COM14, com14);
750 if (ret < 0)
751 return ret;
752
753 edge &= ~EDGE_FACTOR_MASK;
754 edge |= ((u8)value & 0x0f);
755
756 return ov965x_write(ov965x, REG_EDGE, edge);
757 }
758
ov965x_set_exposure(struct ov965x * ov965x,int exp)759 static int ov965x_set_exposure(struct ov965x *ov965x, int exp)
760 {
761 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
762 bool auto_exposure = (exp == V4L2_EXPOSURE_AUTO);
763 int ret;
764 u8 reg;
765
766 if (ctrls->auto_exp->is_new) {
767 ret = ov965x_read(ov965x, REG_COM8, ®);
768 if (ret < 0)
769 return ret;
770 if (auto_exposure)
771 reg |= (COM8_AEC | COM8_AGC);
772 else
773 reg &= ~(COM8_AEC | COM8_AGC);
774 ret = ov965x_write(ov965x, REG_COM8, reg);
775 if (ret < 0)
776 return ret;
777 }
778
779 if (!auto_exposure && ctrls->exposure->is_new) {
780 unsigned int exposure = (ctrls->exposure->val * 100)
781 / ov965x->exp_row_interval;
782 /*
783 * Manual exposure value
784 * [b15:b0] - AECHM (b15:b10), AECH (b9:b2), COM1 (b1:b0)
785 */
786 ret = ov965x_write(ov965x, REG_COM1, exposure & 0x3);
787 if (!ret)
788 ret = ov965x_write(ov965x, REG_AECH,
789 (exposure >> 2) & 0xff);
790 if (!ret)
791 ret = ov965x_write(ov965x, REG_AECHM,
792 (exposure >> 10) & 0x3f);
793 /* Update the value to minimize rounding errors */
794 ctrls->exposure->val = ((exposure * ov965x->exp_row_interval)
795 + 50) / 100;
796 if (ret < 0)
797 return ret;
798 }
799
800 v4l2_ctrl_activate(ov965x->ctrls.brightness, !exp);
801 return 0;
802 }
803
ov965x_set_flip(struct ov965x * ov965x)804 static int ov965x_set_flip(struct ov965x *ov965x)
805 {
806 u8 mvfp = 0;
807
808 if (ov965x->ctrls.hflip->val)
809 mvfp |= MVFP_MIRROR;
810
811 if (ov965x->ctrls.vflip->val)
812 mvfp |= MVFP_FLIP;
813
814 return ov965x_write(ov965x, REG_MVFP, mvfp);
815 }
816
817 #define NUM_SAT_LEVELS 5
818 #define NUM_SAT_REGS 6
819
ov965x_set_saturation(struct ov965x * ov965x,int val)820 static int ov965x_set_saturation(struct ov965x *ov965x, int val)
821 {
822 static const u8 regs[NUM_SAT_LEVELS][NUM_SAT_REGS] = {
823 /* MTX(1)...MTX(6) */
824 { 0x1d, 0x1f, 0x02, 0x09, 0x13, 0x1c }, /* -2 */
825 { 0x2e, 0x31, 0x02, 0x0e, 0x1e, 0x2d }, /* -1 */
826 { 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38 }, /* 0 */
827 { 0x46, 0x49, 0x04, 0x16, 0x2e, 0x43 }, /* +1 */
828 { 0x57, 0x5c, 0x05, 0x1b, 0x39, 0x54 }, /* +2 */
829 };
830 u8 addr = REG_MTX(1);
831 int i, ret = 0;
832
833 val += (NUM_SAT_LEVELS / 2);
834 if (val >= NUM_SAT_LEVELS)
835 return -EINVAL;
836
837 for (i = 0; i < NUM_SAT_REGS && !ret; i++)
838 ret = ov965x_write(ov965x, addr + i, regs[val][i]);
839
840 return ret;
841 }
842
ov965x_set_test_pattern(struct ov965x * ov965x,int value)843 static int ov965x_set_test_pattern(struct ov965x *ov965x, int value)
844 {
845 int ret;
846 u8 reg;
847
848 ret = ov965x_read(ov965x, REG_COM23, ®);
849 if (ret < 0)
850 return ret;
851 reg = value ? reg | COM23_TEST_MODE : reg & ~COM23_TEST_MODE;
852 return ov965x_write(ov965x, REG_COM23, reg);
853 }
854
__g_volatile_ctrl(struct ov965x * ov965x,struct v4l2_ctrl * ctrl)855 static int __g_volatile_ctrl(struct ov965x *ov965x, struct v4l2_ctrl *ctrl)
856 {
857 unsigned int exposure, gain, m;
858 u8 reg0, reg1, reg2;
859 int ret;
860
861 if (!ov965x->power)
862 return 0;
863
864 switch (ctrl->id) {
865 case V4L2_CID_AUTOGAIN:
866 if (!ctrl->val)
867 return 0;
868 ret = ov965x_read(ov965x, REG_GAIN, ®0);
869 if (ret < 0)
870 return ret;
871 ret = ov965x_read(ov965x, REG_VREF, ®1);
872 if (ret < 0)
873 return ret;
874 gain = ((reg1 >> 6) << 8) | reg0;
875 m = 0x01 << fls(gain >> 4);
876 ov965x->ctrls.gain->val = m * (16 + (gain & 0xf));
877 break;
878
879 case V4L2_CID_EXPOSURE_AUTO:
880 if (ctrl->val == V4L2_EXPOSURE_MANUAL)
881 return 0;
882 ret = ov965x_read(ov965x, REG_COM1, ®0);
883 if (ret < 0)
884 return ret;
885 ret = ov965x_read(ov965x, REG_AECH, ®1);
886 if (ret < 0)
887 return ret;
888 ret = ov965x_read(ov965x, REG_AECHM, ®2);
889 if (ret < 0)
890 return ret;
891 exposure = ((reg2 & 0x3f) << 10) | (reg1 << 2) |
892 (reg0 & 0x3);
893 ov965x->ctrls.exposure->val = ((exposure *
894 ov965x->exp_row_interval) + 50) / 100;
895 break;
896 }
897
898 return 0;
899 }
900
ov965x_g_volatile_ctrl(struct v4l2_ctrl * ctrl)901 static int ov965x_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
902 {
903 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
904 struct ov965x *ov965x = to_ov965x(sd);
905 int ret;
906
907 v4l2_dbg(1, debug, sd, "g_ctrl: %s\n", ctrl->name);
908
909 mutex_lock(&ov965x->lock);
910 ret = __g_volatile_ctrl(ov965x, ctrl);
911 mutex_unlock(&ov965x->lock);
912 return ret;
913 }
914
ov965x_s_ctrl(struct v4l2_ctrl * ctrl)915 static int ov965x_s_ctrl(struct v4l2_ctrl *ctrl)
916 {
917 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
918 struct ov965x *ov965x = to_ov965x(sd);
919 int ret = -EINVAL;
920
921 v4l2_dbg(1, debug, sd, "s_ctrl: %s, value: %d. power: %d\n",
922 ctrl->name, ctrl->val, ov965x->power);
923
924 mutex_lock(&ov965x->lock);
925 /*
926 * If the device is not powered up now postpone applying control's
927 * value to the hardware, until it is ready to accept commands.
928 */
929 if (ov965x->power == 0) {
930 mutex_unlock(&ov965x->lock);
931 return 0;
932 }
933
934 switch (ctrl->id) {
935 case V4L2_CID_AUTO_WHITE_BALANCE:
936 ret = ov965x_set_white_balance(ov965x, ctrl->val);
937 break;
938
939 case V4L2_CID_BRIGHTNESS:
940 ret = ov965x_set_brightness(ov965x, ctrl->val);
941 break;
942
943 case V4L2_CID_EXPOSURE_AUTO:
944 ret = ov965x_set_exposure(ov965x, ctrl->val);
945 break;
946
947 case V4L2_CID_AUTOGAIN:
948 ret = ov965x_set_gain(ov965x, ctrl->val);
949 break;
950
951 case V4L2_CID_HFLIP:
952 ret = ov965x_set_flip(ov965x);
953 break;
954
955 case V4L2_CID_POWER_LINE_FREQUENCY:
956 ret = ov965x_set_banding_filter(ov965x, ctrl->val);
957 break;
958
959 case V4L2_CID_SATURATION:
960 ret = ov965x_set_saturation(ov965x, ctrl->val);
961 break;
962
963 case V4L2_CID_SHARPNESS:
964 ret = ov965x_set_sharpness(ov965x, ctrl->val);
965 break;
966
967 case V4L2_CID_TEST_PATTERN:
968 ret = ov965x_set_test_pattern(ov965x, ctrl->val);
969 break;
970 }
971
972 mutex_unlock(&ov965x->lock);
973 return ret;
974 }
975
976 static const struct v4l2_ctrl_ops ov965x_ctrl_ops = {
977 .g_volatile_ctrl = ov965x_g_volatile_ctrl,
978 .s_ctrl = ov965x_s_ctrl,
979 };
980
981 static const char * const test_pattern_menu[] = {
982 "Disabled",
983 "Color bars",
984 };
985
ov965x_initialize_controls(struct ov965x * ov965x)986 static int ov965x_initialize_controls(struct ov965x *ov965x)
987 {
988 const struct v4l2_ctrl_ops *ops = &ov965x_ctrl_ops;
989 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
990 struct v4l2_ctrl_handler *hdl = &ctrls->handler;
991 int ret;
992
993 ret = v4l2_ctrl_handler_init(hdl, 16);
994 if (ret < 0)
995 return ret;
996
997 /* Auto/manual white balance */
998 ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
999 V4L2_CID_AUTO_WHITE_BALANCE,
1000 0, 1, 1, 1);
1001 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
1002 0, 0xff, 1, 0x80);
1003 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
1004 0, 0xff, 1, 0x80);
1005 /* Auto/manual exposure */
1006 ctrls->auto_exp =
1007 v4l2_ctrl_new_std_menu(hdl, ops,
1008 V4L2_CID_EXPOSURE_AUTO,
1009 V4L2_EXPOSURE_MANUAL, 0,
1010 V4L2_EXPOSURE_AUTO);
1011 /* Exposure time, in 100 us units. min/max is updated dynamically. */
1012 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops,
1013 V4L2_CID_EXPOSURE_ABSOLUTE,
1014 2, 1500, 1, 500);
1015 /* Auto/manual gain */
1016 ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
1017 0, 1, 1, 1);
1018 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
1019 16, 64 * (16 + 15), 1, 64 * 16);
1020
1021 ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
1022 -2, 2, 1, 0);
1023 ctrls->brightness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS,
1024 -3, 3, 1, 0);
1025 ctrls->sharpness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS,
1026 0, 32, 1, 6);
1027
1028 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
1029 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
1030
1031 ctrls->light_freq =
1032 v4l2_ctrl_new_std_menu(hdl, ops,
1033 V4L2_CID_POWER_LINE_FREQUENCY,
1034 V4L2_CID_POWER_LINE_FREQUENCY_60HZ, ~0x7,
1035 V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
1036
1037 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
1038 ARRAY_SIZE(test_pattern_menu) - 1, 0, 0,
1039 test_pattern_menu);
1040 if (hdl->error) {
1041 ret = hdl->error;
1042 v4l2_ctrl_handler_free(hdl);
1043 return ret;
1044 }
1045
1046 ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
1047 ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
1048
1049 v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
1050 v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
1051 v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
1052 v4l2_ctrl_cluster(2, &ctrls->hflip);
1053
1054 ov965x->sd.ctrl_handler = hdl;
1055 return 0;
1056 }
1057
1058 /*
1059 * V4L2 subdev video and pad level operations
1060 */
ov965x_get_default_format(struct v4l2_mbus_framefmt * mf)1061 static void ov965x_get_default_format(struct v4l2_mbus_framefmt *mf)
1062 {
1063 mf->width = ov965x_framesizes[0].width;
1064 mf->height = ov965x_framesizes[0].height;
1065 mf->colorspace = ov965x_formats[0].colorspace;
1066 mf->code = ov965x_formats[0].code;
1067 mf->field = V4L2_FIELD_NONE;
1068 }
1069
ov965x_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1070 static int ov965x_enum_mbus_code(struct v4l2_subdev *sd,
1071 struct v4l2_subdev_state *sd_state,
1072 struct v4l2_subdev_mbus_code_enum *code)
1073 {
1074 if (code->index >= ARRAY_SIZE(ov965x_formats))
1075 return -EINVAL;
1076
1077 code->code = ov965x_formats[code->index].code;
1078 return 0;
1079 }
1080
ov965x_enum_frame_sizes(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)1081 static int ov965x_enum_frame_sizes(struct v4l2_subdev *sd,
1082 struct v4l2_subdev_state *sd_state,
1083 struct v4l2_subdev_frame_size_enum *fse)
1084 {
1085 int i = ARRAY_SIZE(ov965x_formats);
1086
1087 if (fse->index >= ARRAY_SIZE(ov965x_framesizes))
1088 return -EINVAL;
1089
1090 while (--i)
1091 if (fse->code == ov965x_formats[i].code)
1092 break;
1093
1094 fse->code = ov965x_formats[i].code;
1095
1096 fse->min_width = ov965x_framesizes[fse->index].width;
1097 fse->max_width = fse->min_width;
1098 fse->max_height = ov965x_framesizes[fse->index].height;
1099 fse->min_height = fse->max_height;
1100
1101 return 0;
1102 }
1103
ov965x_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)1104 static int ov965x_g_frame_interval(struct v4l2_subdev *sd,
1105 struct v4l2_subdev_frame_interval *fi)
1106 {
1107 struct ov965x *ov965x = to_ov965x(sd);
1108
1109 mutex_lock(&ov965x->lock);
1110 fi->interval = ov965x->fiv->interval;
1111 mutex_unlock(&ov965x->lock);
1112
1113 return 0;
1114 }
1115
__ov965x_set_frame_interval(struct ov965x * ov965x,struct v4l2_subdev_frame_interval * fi)1116 static int __ov965x_set_frame_interval(struct ov965x *ov965x,
1117 struct v4l2_subdev_frame_interval *fi)
1118 {
1119 struct v4l2_mbus_framefmt *mbus_fmt = &ov965x->format;
1120 const struct ov965x_interval *fiv = &ov965x_intervals[0];
1121 u64 req_int, err, min_err = ~0ULL;
1122 unsigned int i;
1123
1124 if (fi->interval.denominator == 0)
1125 return -EINVAL;
1126
1127 req_int = (u64)fi->interval.numerator * 10000;
1128 do_div(req_int, fi->interval.denominator);
1129
1130 for (i = 0; i < ARRAY_SIZE(ov965x_intervals); i++) {
1131 const struct ov965x_interval *iv = &ov965x_intervals[i];
1132
1133 if (mbus_fmt->width != iv->size.width ||
1134 mbus_fmt->height != iv->size.height)
1135 continue;
1136 err = abs((u64)(iv->interval.numerator * 10000) /
1137 iv->interval.denominator - req_int);
1138 if (err < min_err) {
1139 fiv = iv;
1140 min_err = err;
1141 }
1142 }
1143 ov965x->fiv = fiv;
1144
1145 v4l2_dbg(1, debug, &ov965x->sd, "Changed frame interval to %u us\n",
1146 fiv->interval.numerator * 1000000 / fiv->interval.denominator);
1147
1148 return 0;
1149 }
1150
ov965x_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)1151 static int ov965x_s_frame_interval(struct v4l2_subdev *sd,
1152 struct v4l2_subdev_frame_interval *fi)
1153 {
1154 struct ov965x *ov965x = to_ov965x(sd);
1155 int ret;
1156
1157 v4l2_dbg(1, debug, sd, "Setting %d/%d frame interval\n",
1158 fi->interval.numerator, fi->interval.denominator);
1159
1160 mutex_lock(&ov965x->lock);
1161 ret = __ov965x_set_frame_interval(ov965x, fi);
1162 ov965x->apply_frame_fmt = 1;
1163 mutex_unlock(&ov965x->lock);
1164 return ret;
1165 }
1166
ov965x_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1167 static int ov965x_get_fmt(struct v4l2_subdev *sd,
1168 struct v4l2_subdev_state *sd_state,
1169 struct v4l2_subdev_format *fmt)
1170 {
1171 struct ov965x *ov965x = to_ov965x(sd);
1172 struct v4l2_mbus_framefmt *mf;
1173
1174 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1175 mf = v4l2_subdev_get_try_format(sd, sd_state, 0);
1176 fmt->format = *mf;
1177 return 0;
1178 }
1179
1180 mutex_lock(&ov965x->lock);
1181 fmt->format = ov965x->format;
1182 mutex_unlock(&ov965x->lock);
1183
1184 return 0;
1185 }
1186
__ov965x_try_frame_size(struct v4l2_mbus_framefmt * mf,const struct ov965x_framesize ** size)1187 static void __ov965x_try_frame_size(struct v4l2_mbus_framefmt *mf,
1188 const struct ov965x_framesize **size)
1189 {
1190 const struct ov965x_framesize *fsize = &ov965x_framesizes[0],
1191 *match = NULL;
1192 int i = ARRAY_SIZE(ov965x_framesizes);
1193 unsigned int min_err = UINT_MAX;
1194
1195 while (i--) {
1196 int err = abs(fsize->width - mf->width)
1197 + abs(fsize->height - mf->height);
1198 if (err < min_err) {
1199 min_err = err;
1200 match = fsize;
1201 }
1202 fsize++;
1203 }
1204 if (!match)
1205 match = &ov965x_framesizes[0];
1206 mf->width = match->width;
1207 mf->height = match->height;
1208 if (size)
1209 *size = match;
1210 }
1211
ov965x_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1212 static int ov965x_set_fmt(struct v4l2_subdev *sd,
1213 struct v4l2_subdev_state *sd_state,
1214 struct v4l2_subdev_format *fmt)
1215 {
1216 unsigned int index = ARRAY_SIZE(ov965x_formats);
1217 struct v4l2_mbus_framefmt *mf = &fmt->format;
1218 struct ov965x *ov965x = to_ov965x(sd);
1219 const struct ov965x_framesize *size = NULL;
1220 int ret = 0;
1221
1222 __ov965x_try_frame_size(mf, &size);
1223
1224 while (--index)
1225 if (ov965x_formats[index].code == mf->code)
1226 break;
1227
1228 mf->colorspace = V4L2_COLORSPACE_JPEG;
1229 mf->code = ov965x_formats[index].code;
1230 mf->field = V4L2_FIELD_NONE;
1231
1232 mutex_lock(&ov965x->lock);
1233
1234 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1235 if (sd_state) {
1236 mf = v4l2_subdev_get_try_format(sd, sd_state,
1237 fmt->pad);
1238 *mf = fmt->format;
1239 }
1240 } else {
1241 if (ov965x->streaming) {
1242 ret = -EBUSY;
1243 } else {
1244 ov965x->frame_size = size;
1245 ov965x->format = fmt->format;
1246 ov965x->tslb_reg = ov965x_formats[index].tslb_reg;
1247 ov965x->apply_frame_fmt = 1;
1248 }
1249 }
1250
1251 if (!ret && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1252 struct v4l2_subdev_frame_interval fiv = {
1253 .interval = { 0, 1 }
1254 };
1255 /* Reset to minimum possible frame interval */
1256 __ov965x_set_frame_interval(ov965x, &fiv);
1257 }
1258 mutex_unlock(&ov965x->lock);
1259
1260 if (!ret)
1261 ov965x_update_exposure_ctrl(ov965x);
1262
1263 return ret;
1264 }
1265
ov965x_set_frame_size(struct ov965x * ov965x)1266 static int ov965x_set_frame_size(struct ov965x *ov965x)
1267 {
1268 int i, ret = 0;
1269
1270 for (i = 0; ret == 0 && i < NUM_FMT_REGS; i++)
1271 ret = ov965x_write(ov965x, frame_size_reg_addr[i],
1272 ov965x->frame_size->regs[i]);
1273 return ret;
1274 }
1275
__ov965x_set_params(struct ov965x * ov965x)1276 static int __ov965x_set_params(struct ov965x *ov965x)
1277 {
1278 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
1279 int ret = 0;
1280 u8 reg;
1281
1282 if (ov965x->apply_frame_fmt) {
1283 reg = DEF_CLKRC + ov965x->fiv->clkrc_div;
1284 ret = ov965x_write(ov965x, REG_CLKRC, reg);
1285 if (ret < 0)
1286 return ret;
1287 ret = ov965x_set_frame_size(ov965x);
1288 if (ret < 0)
1289 return ret;
1290 ret = ov965x_read(ov965x, REG_TSLB, ®);
1291 if (ret < 0)
1292 return ret;
1293 reg &= ~TSLB_YUYV_MASK;
1294 reg |= ov965x->tslb_reg;
1295 ret = ov965x_write(ov965x, REG_TSLB, reg);
1296 if (ret < 0)
1297 return ret;
1298 }
1299 ret = ov965x_set_default_gamma_curve(ov965x);
1300 if (ret < 0)
1301 return ret;
1302 ret = ov965x_set_color_matrix(ov965x);
1303 if (ret < 0)
1304 return ret;
1305 /*
1306 * Select manual banding filter, the filter will
1307 * be enabled further if required.
1308 */
1309 ret = ov965x_read(ov965x, REG_COM11, ®);
1310 if (!ret)
1311 reg |= COM11_BANDING;
1312 ret = ov965x_write(ov965x, REG_COM11, reg);
1313 if (ret < 0)
1314 return ret;
1315 /*
1316 * Banding filter (REG_MBD value) needs to match selected
1317 * resolution and frame rate, so it's always updated here.
1318 */
1319 return ov965x_set_banding_filter(ov965x, ctrls->light_freq->val);
1320 }
1321
ov965x_s_stream(struct v4l2_subdev * sd,int on)1322 static int ov965x_s_stream(struct v4l2_subdev *sd, int on)
1323 {
1324 struct ov965x *ov965x = to_ov965x(sd);
1325 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
1326 int ret = 0;
1327
1328 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on);
1329
1330 mutex_lock(&ov965x->lock);
1331 if (ov965x->streaming == !on) {
1332 if (on)
1333 ret = __ov965x_set_params(ov965x);
1334
1335 if (!ret && ctrls->update) {
1336 /*
1337 * ov965x_s_ctrl callback takes the mutex
1338 * so it needs to be released here.
1339 */
1340 mutex_unlock(&ov965x->lock);
1341 ret = v4l2_ctrl_handler_setup(&ctrls->handler);
1342
1343 mutex_lock(&ov965x->lock);
1344 if (!ret)
1345 ctrls->update = 0;
1346 }
1347 if (!ret)
1348 ret = ov965x_write(ov965x, REG_COM2,
1349 on ? 0x01 : 0x11);
1350 }
1351 if (!ret)
1352 ov965x->streaming += on ? 1 : -1;
1353
1354 WARN_ON(ov965x->streaming < 0);
1355 mutex_unlock(&ov965x->lock);
1356
1357 return ret;
1358 }
1359
1360 /*
1361 * V4L2 subdev internal operations
1362 */
ov965x_open(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)1363 static int ov965x_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1364 {
1365 struct v4l2_mbus_framefmt *mf =
1366 v4l2_subdev_get_try_format(sd, fh->state, 0);
1367
1368 ov965x_get_default_format(mf);
1369 return 0;
1370 }
1371
1372 static const struct v4l2_subdev_pad_ops ov965x_pad_ops = {
1373 .enum_mbus_code = ov965x_enum_mbus_code,
1374 .enum_frame_size = ov965x_enum_frame_sizes,
1375 .get_fmt = ov965x_get_fmt,
1376 .set_fmt = ov965x_set_fmt,
1377 };
1378
1379 static const struct v4l2_subdev_video_ops ov965x_video_ops = {
1380 .s_stream = ov965x_s_stream,
1381 .g_frame_interval = ov965x_g_frame_interval,
1382 .s_frame_interval = ov965x_s_frame_interval,
1383
1384 };
1385
1386 static const struct v4l2_subdev_internal_ops ov965x_sd_internal_ops = {
1387 .open = ov965x_open,
1388 };
1389
1390 static const struct v4l2_subdev_core_ops ov965x_core_ops = {
1391 .s_power = ov965x_s_power,
1392 .log_status = v4l2_ctrl_subdev_log_status,
1393 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1394 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1395 };
1396
1397 static const struct v4l2_subdev_ops ov965x_subdev_ops = {
1398 .core = &ov965x_core_ops,
1399 .pad = &ov965x_pad_ops,
1400 .video = &ov965x_video_ops,
1401 };
1402
ov965x_configure_gpios(struct ov965x * ov965x)1403 static int ov965x_configure_gpios(struct ov965x *ov965x)
1404 {
1405 struct device *dev = regmap_get_device(ov965x->regmap);
1406
1407 ov965x->gpios[GPIO_PWDN] = devm_gpiod_get_optional(dev, "powerdown",
1408 GPIOD_OUT_HIGH);
1409 if (IS_ERR(ov965x->gpios[GPIO_PWDN])) {
1410 dev_info(dev, "can't get %s GPIO\n", "powerdown");
1411 return PTR_ERR(ov965x->gpios[GPIO_PWDN]);
1412 }
1413
1414 ov965x->gpios[GPIO_RST] = devm_gpiod_get_optional(dev, "reset",
1415 GPIOD_OUT_HIGH);
1416 if (IS_ERR(ov965x->gpios[GPIO_RST])) {
1417 dev_info(dev, "can't get %s GPIO\n", "reset");
1418 return PTR_ERR(ov965x->gpios[GPIO_RST]);
1419 }
1420
1421 return 0;
1422 }
1423
ov965x_detect_sensor(struct v4l2_subdev * sd)1424 static int ov965x_detect_sensor(struct v4l2_subdev *sd)
1425 {
1426 struct ov965x *ov965x = to_ov965x(sd);
1427 u8 pid, ver;
1428 int ret;
1429
1430 mutex_lock(&ov965x->lock);
1431 ret = __ov965x_set_power(ov965x, 1);
1432 if (ret)
1433 goto out;
1434
1435 msleep(25);
1436
1437 /* Check sensor revision */
1438 ret = ov965x_read(ov965x, REG_PID, &pid);
1439 if (!ret)
1440 ret = ov965x_read(ov965x, REG_VER, &ver);
1441
1442 __ov965x_set_power(ov965x, 0);
1443
1444 if (!ret) {
1445 ov965x->id = OV965X_ID(pid, ver);
1446 if (ov965x->id == OV9650_ID || ov965x->id == OV9652_ID) {
1447 v4l2_info(sd, "Found OV%04X sensor\n", ov965x->id);
1448 } else {
1449 v4l2_err(sd, "Sensor detection failed (%04X)\n",
1450 ov965x->id);
1451 ret = -ENODEV;
1452 }
1453 }
1454 out:
1455 mutex_unlock(&ov965x->lock);
1456
1457 return ret;
1458 }
1459
ov965x_probe(struct i2c_client * client)1460 static int ov965x_probe(struct i2c_client *client)
1461 {
1462 struct v4l2_subdev *sd;
1463 struct ov965x *ov965x;
1464 int ret;
1465 static const struct regmap_config ov965x_regmap_config = {
1466 .reg_bits = 8,
1467 .val_bits = 8,
1468 .max_register = 0xab,
1469 };
1470
1471 ov965x = devm_kzalloc(&client->dev, sizeof(*ov965x), GFP_KERNEL);
1472 if (!ov965x)
1473 return -ENOMEM;
1474
1475 ov965x->regmap = devm_regmap_init_sccb(client, &ov965x_regmap_config);
1476 if (IS_ERR(ov965x->regmap)) {
1477 dev_err(&client->dev, "Failed to allocate register map\n");
1478 return PTR_ERR(ov965x->regmap);
1479 }
1480
1481 if (dev_fwnode(&client->dev)) {
1482 ov965x->clk = devm_clk_get(&client->dev, NULL);
1483 if (IS_ERR(ov965x->clk))
1484 return PTR_ERR(ov965x->clk);
1485 ov965x->mclk_frequency = clk_get_rate(ov965x->clk);
1486
1487 ret = ov965x_configure_gpios(ov965x);
1488 if (ret < 0)
1489 return ret;
1490 } else {
1491 dev_err(&client->dev,
1492 "No device properties specified\n");
1493
1494 return -EINVAL;
1495 }
1496
1497 mutex_init(&ov965x->lock);
1498
1499 sd = &ov965x->sd;
1500 v4l2_i2c_subdev_init(sd, client, &ov965x_subdev_ops);
1501 strscpy(sd->name, DRIVER_NAME, sizeof(sd->name));
1502
1503 sd->internal_ops = &ov965x_sd_internal_ops;
1504 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1505 V4L2_SUBDEV_FL_HAS_EVENTS;
1506
1507 ov965x->pad.flags = MEDIA_PAD_FL_SOURCE;
1508 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1509 ret = media_entity_pads_init(&sd->entity, 1, &ov965x->pad);
1510 if (ret < 0)
1511 goto err_mutex;
1512
1513 ret = ov965x_initialize_controls(ov965x);
1514 if (ret < 0)
1515 goto err_me;
1516
1517 ov965x_get_default_format(&ov965x->format);
1518 ov965x->frame_size = &ov965x_framesizes[0];
1519 ov965x->fiv = &ov965x_intervals[0];
1520
1521 ret = ov965x_detect_sensor(sd);
1522 if (ret < 0)
1523 goto err_ctrls;
1524
1525 /* Update exposure time min/max to match frame format */
1526 ov965x_update_exposure_ctrl(ov965x);
1527
1528 ret = v4l2_async_register_subdev(sd);
1529 if (ret < 0)
1530 goto err_ctrls;
1531
1532 return 0;
1533 err_ctrls:
1534 v4l2_ctrl_handler_free(sd->ctrl_handler);
1535 err_me:
1536 media_entity_cleanup(&sd->entity);
1537 err_mutex:
1538 mutex_destroy(&ov965x->lock);
1539 return ret;
1540 }
1541
ov965x_remove(struct i2c_client * client)1542 static void ov965x_remove(struct i2c_client *client)
1543 {
1544 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1545 struct ov965x *ov965x = to_ov965x(sd);
1546
1547 v4l2_async_unregister_subdev(sd);
1548 v4l2_ctrl_handler_free(sd->ctrl_handler);
1549 media_entity_cleanup(&sd->entity);
1550 mutex_destroy(&ov965x->lock);
1551 }
1552
1553 static const struct i2c_device_id ov965x_id[] = {
1554 { "OV9650", 0 },
1555 { "OV9652", 0 },
1556 { /* sentinel */ }
1557 };
1558 MODULE_DEVICE_TABLE(i2c, ov965x_id);
1559
1560 #if IS_ENABLED(CONFIG_OF)
1561 static const struct of_device_id ov965x_of_match[] = {
1562 { .compatible = "ovti,ov9650", },
1563 { .compatible = "ovti,ov9652", },
1564 { /* sentinel */ }
1565 };
1566 MODULE_DEVICE_TABLE(of, ov965x_of_match);
1567 #endif
1568
1569 static struct i2c_driver ov965x_i2c_driver = {
1570 .driver = {
1571 .name = DRIVER_NAME,
1572 .of_match_table = of_match_ptr(ov965x_of_match),
1573 },
1574 .probe = ov965x_probe,
1575 .remove = ov965x_remove,
1576 .id_table = ov965x_id,
1577 };
1578
1579 module_i2c_driver(ov965x_i2c_driver);
1580
1581 MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
1582 MODULE_DESCRIPTION("OV9650/OV9652 CMOS Image Sensor driver");
1583 MODULE_LICENSE("GPL");
1584
