1 // SPDX-License-Identifier: GPL-2.0-only
3 * Omnivision OV9650/OV9652 CMOS Image Sensor driver
7 * Register definitions and initial settings based on a driver written
9 * Copyright (c) 2010, Vladimir Fonov
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/gpio/consumer.h>
15 #include <linux/i2c.h>
16 #include <linux/kernel.h>
17 #include <linux/media.h>
18 #include <linux/module.h>
19 #include <linux/ratelimit.h>
20 #include <linux/regmap.h>
21 #include <linux/slab.h>
22 #include <linux/string.h>
23 #include <linux/videodev2.h>
25 #include <media/media-entity.h>
26 #include <media/v4l2-async.h>
27 #include <media/v4l2-ctrls.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-event.h>
30 #include <media/v4l2-image-sizes.h>
31 #include <media/v4l2-subdev.h>
32 #include <media/v4l2-mediabus.h>
33 #include <media/i2c/ov9650.h>
36 module_param(debug, int, 0644);
37 MODULE_PARM_DESC(debug, "Debug level (0-2)");
39 #define DRIVER_NAME "OV9650"
42 * OV9650/OV9652 register definitions
44 #define REG_GAIN 0x00 /* Gain control, AGC[7:0] */
45 #define REG_BLUE 0x01 /* AWB - Blue channel gain */
46 #define REG_RED 0x02 /* AWB - Red channel gain */
47 #define REG_VREF 0x03 /* [7:6] - AGC[9:8], [5:3]/[2:0] */
48 #define VREF_GAIN_MASK 0xc0 /* - VREF end/start low 3 bits */
50 #define COM1_CCIR656 0x40
51 #define REG_B_AVE 0x05
52 #define REG_GB_AVE 0x06
53 #define REG_GR_AVE 0x07
54 #define REG_R_AVE 0x08
56 #define REG_PID 0x0a /* Product ID MSB */
57 #define REG_VER 0x0b /* Product ID LSB */
59 #define COM3_SWAP 0x40
60 #define COM3_VARIOPIXEL1 0x04
61 #define REG_COM4 0x0d /* Vario Pixels */
62 #define COM4_VARIOPIXEL2 0x80
63 #define REG_COM5 0x0e /* System clock options */
64 #define COM5_SLAVE_MODE 0x10
65 #define COM5_SYSTEMCLOCK48MHZ 0x80
66 #define REG_COM6 0x0f /* HREF & ADBLC options */
67 #define REG_AECH 0x10 /* Exposure value, AEC[9:2] */
68 #define REG_CLKRC 0x11 /* Clock control */
69 #define CLK_EXT 0x40 /* Use external clock directly */
70 #define CLK_SCALE 0x3f /* Mask for internal clock scale */
71 #define REG_COM7 0x12 /* SCCB reset, output format */
72 #define COM7_RESET 0x80
73 #define COM7_FMT_MASK 0x38
74 #define COM7_FMT_VGA 0x40
75 #define COM7_FMT_CIF 0x20
76 #define COM7_FMT_QVGA 0x10
77 #define COM7_FMT_QCIF 0x08
80 #define COM7_BAYER 0x01
81 #define COM7_PBAYER 0x05
82 #define REG_COM8 0x13 /* AGC/AEC options */
83 #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */
84 #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */
85 #define COM8_BFILT 0x20 /* Band filter enable */
86 #define COM8_AGC 0x04 /* Auto gain enable */
87 #define COM8_AWB 0x02 /* White balance enable */
88 #define COM8_AEC 0x01 /* Auto exposure enable */
89 #define REG_COM9 0x14 /* Gain ceiling */
90 #define COM9_GAIN_CEIL_MASK 0x70 /* */
91 #define REG_COM10 0x15 /* PCLK, HREF, HSYNC signals polarity */
92 #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */
93 #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */
94 #define COM10_HREF_REV 0x08 /* Reverse HREF */
95 #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */
96 #define COM10_VS_NEG 0x02 /* VSYNC negative */
97 #define COM10_HS_NEG 0x01 /* HSYNC negative */
98 #define REG_HSTART 0x17 /* Horiz start high bits */
99 #define REG_HSTOP 0x18 /* Horiz stop high bits */
100 #define REG_VSTART 0x19 /* Vert start high bits */
101 #define REG_VSTOP 0x1a /* Vert stop high bits */
102 #define REG_PSHFT 0x1b /* Pixel delay after HREF */
103 #define REG_MIDH 0x1c /* Manufacturer ID MSB */
104 #define REG_MIDL 0x1d /* Manufufacturer ID LSB */
105 #define REG_MVFP 0x1e /* Image mirror/flip */
106 #define MVFP_MIRROR 0x20 /* Mirror image */
107 #define MVFP_FLIP 0x10 /* Vertical flip */
108 #define REG_BOS 0x20 /* B channel Offset */
109 #define REG_GBOS 0x21 /* Gb channel Offset */
110 #define REG_GROS 0x22 /* Gr channel Offset */
111 #define REG_ROS 0x23 /* R channel Offset */
112 #define REG_AEW 0x24 /* AGC upper limit */
113 #define REG_AEB 0x25 /* AGC lower limit */
114 #define REG_VPT 0x26 /* AGC/AEC fast mode op region */
115 #define REG_BBIAS 0x27 /* B channel output bias */
116 #define REG_GBBIAS 0x28 /* Gb channel output bias */
117 #define REG_GRCOM 0x29 /* Analog BLC & regulator */
118 #define REG_EXHCH 0x2a /* Dummy pixel insert MSB */
119 #define REG_EXHCL 0x2b /* Dummy pixel insert LSB */
120 #define REG_RBIAS 0x2c /* R channel output bias */
121 #define REG_ADVFL 0x2d /* LSB of dummy line insert */
122 #define REG_ADVFH 0x2e /* MSB of dummy line insert */
123 #define REG_YAVE 0x2f /* Y/G channel average value */
124 #define REG_HSYST 0x30 /* HSYNC rising edge delay LSB*/
125 #define REG_HSYEN 0x31 /* HSYNC falling edge delay LSB*/
126 #define REG_HREF 0x32 /* HREF pieces */
127 #define REG_CHLF 0x33 /* reserved */
128 #define REG_ADC 0x37 /* reserved */
129 #define REG_ACOM 0x38 /* reserved */
130 #define REG_OFON 0x39 /* Power down register */
131 #define OFON_PWRDN 0x08 /* Power down bit */
132 #define REG_TSLB 0x3a /* YUVU format */
133 #define TSLB_YUYV_MASK 0x0c /* UYVY or VYUY - see com13 */
134 #define REG_COM11 0x3b /* Night mode, banding filter enable */
135 #define COM11_NIGHT 0x80 /* Night mode enable */
136 #define COM11_NMFR 0x60 /* Two bit NM frame rate */
137 #define COM11_BANDING 0x01 /* Banding filter */
138 #define COM11_AEC_REF_MASK 0x18 /* AEC reference area selection */
139 #define REG_COM12 0x3c /* HREF option, UV average */
140 #define COM12_HREF 0x80 /* HREF always */
141 #define REG_COM13 0x3d /* Gamma selection, Color matrix en. */
142 #define COM13_GAMMA 0x80 /* Gamma enable */
143 #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */
144 #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */
145 #define REG_COM14 0x3e /* Edge enhancement options */
146 #define COM14_EDGE_EN 0x02
147 #define COM14_EEF_X2 0x01
148 #define REG_EDGE 0x3f /* Edge enhancement factor */
149 #define EDGE_FACTOR_MASK 0x0f
150 #define REG_COM15 0x40 /* Output range, RGB 555/565 */
151 #define COM15_R10F0 0x00 /* Data range 10 to F0 */
152 #define COM15_R01FE 0x80 /* 01 to FE */
153 #define COM15_R00FF 0xc0 /* 00 to FF */
154 #define COM15_RGB565 0x10 /* RGB565 output */
155 #define COM15_RGB555 0x30 /* RGB555 output */
156 #define COM15_SWAPRB 0x04 /* Swap R&B */
157 #define REG_COM16 0x41 /* Color matrix coeff options */
158 #define REG_COM17 0x42 /* Single frame out, banding filter */
159 /* n = 1...9, 0x4f..0x57 */
160 #define REG_MTX(__n) (0x4f + (__n) - 1)
161 #define REG_MTXS 0x58
162 /* Lens Correction Option 1...5, __n = 0...5 */
163 #define REG_LCC(__n) (0x62 + (__n) - 1)
164 #define LCC5_LCC_ENABLE 0x01 /* LCC5, enable lens correction */
165 #define LCC5_LCC_COLOR 0x04
166 #define REG_MANU 0x67 /* Manual U value */
167 #define REG_MANV 0x68 /* Manual V value */
168 #define REG_HV 0x69 /* Manual banding filter MSB */
169 #define REG_MBD 0x6a /* Manual banding filter value */
170 #define REG_DBLV 0x6b /* reserved */
171 #define REG_GSP 0x6c /* Gamma curve */
173 #define REG_GST 0x7c /* Gamma curve */
175 #define REG_COM21 0x8b
176 #define REG_COM22 0x8c /* Edge enhancement, denoising */
177 #define COM22_WHTPCOR 0x02 /* White pixel correction enable */
178 #define COM22_WHTPCOROPT 0x01 /* White pixel correction option */
179 #define COM22_DENOISE 0x10 /* White pixel correction option */
180 #define REG_COM23 0x8d /* Color bar test, color gain */
181 #define COM23_TEST_MODE 0x10
182 #define REG_DBLC1 0x8f /* Digital BLC */
183 #define REG_DBLC_B 0x90 /* Digital BLC B channel offset */
184 #define REG_DBLC_R 0x91 /* Digital BLC R channel offset */
185 #define REG_DM_LNL 0x92 /* Dummy line low 8 bits */
186 #define REG_DM_LNH 0x93 /* Dummy line high 8 bits */
187 #define REG_LCCFB 0x9d /* Lens Correction B channel */
188 #define REG_LCCFR 0x9e /* Lens Correction R channel */
189 #define REG_DBLC_GB 0x9f /* Digital BLC GB chan offset */
190 #define REG_DBLC_GR 0xa0 /* Digital BLC GR chan offset */
191 #define REG_AECHM 0xa1 /* Exposure value - bits AEC[15:10] */
192 #define REG_BD50ST 0xa2 /* Banding filter value for 50Hz */
193 #define REG_BD60ST 0xa3 /* Banding filter value for 60Hz */
194 #define REG_NULL 0xff /* Array end token */
196 #define DEF_CLKRC 0x80
198 #define OV965X_ID(_msb, _lsb) ((_msb) << 8 | (_lsb))
199 #define OV9650_ID 0x9650
200 #define OV9652_ID 0x9652
202 struct ov965x_ctrls {
203 struct v4l2_ctrl_handler handler;
205 struct v4l2_ctrl *auto_exp;
206 struct v4l2_ctrl *exposure;
209 struct v4l2_ctrl *auto_wb;
210 struct v4l2_ctrl *blue_balance;
211 struct v4l2_ctrl *red_balance;
214 struct v4l2_ctrl *hflip;
215 struct v4l2_ctrl *vflip;
218 struct v4l2_ctrl *auto_gain;
219 struct v4l2_ctrl *gain;
221 struct v4l2_ctrl *brightness;
222 struct v4l2_ctrl *saturation;
223 struct v4l2_ctrl *sharpness;
224 struct v4l2_ctrl *light_freq;
228 struct ov965x_framesize {
235 struct ov965x_interval {
236 struct v4l2_fract interval;
237 /* Maximum resolution for this interval */
238 struct v4l2_frmsize_discrete size;
249 struct v4l2_subdev sd;
250 struct media_pad pad;
251 enum v4l2_mbus_type bus_type;
252 struct gpio_desc *gpios[NUM_GPIOS];
253 /* External master clock frequency */
254 unsigned long mclk_frequency;
257 /* Protects the struct fields below */
260 struct regmap *regmap;
262 /* Exposure row interval in us */
263 unsigned int exp_row_interval;
266 const struct ov965x_framesize *frame_size;
267 /* YUYV sequence (pixel format) control register */
269 struct v4l2_mbus_framefmt format;
271 struct ov965x_ctrls ctrls;
272 /* Pointer to frame rate control data structure */
273 const struct ov965x_interval *fiv;
286 static const struct i2c_rv ov965x_init_regs[] = {
287 { REG_COM2, 0x10 }, /* Set soft sleep mode */
288 { REG_COM5, 0x00 }, /* System clock options */
289 { REG_COM2, 0x01 }, /* Output drive, soft sleep mode */
290 { REG_COM10, 0x00 }, /* Slave mode, HREF vs HSYNC, signals negate */
291 { REG_EDGE, 0xa6 }, /* Edge enhancement treshhold and factor */
292 { REG_COM16, 0x02 }, /* Color matrix coeff double option */
293 { REG_COM17, 0x08 }, /* Single frame out, banding filter */
295 { REG_CHLF, 0xc0 }, /* Reserved */
300 { REG_COM12, 0x77 }, /* HREF option, UV average */
305 { REG_COM15, 0xc1 }, /* Output range, RGB 555/565 */
306 { REG_GRCOM, 0x2f }, /* Analog BLC & regulator */
307 { REG_COM6, 0x43 }, /* HREF & ADBLC options */
308 { REG_COM8, 0xe5 }, /* AGC/AEC options */
309 { REG_COM13, 0x90 }, /* Gamma selection, colour matrix, UV delay */
310 { REG_HV, 0x80 }, /* Manual banding filter MSB */
311 { 0x5c, 0x96 }, /* Reserved up to 0xa5 */
327 { 0xa4, 0x74 }, /* reserved */
328 { REG_COM23, 0x02 }, /* Color gain analog/_digital_ */
329 { REG_COM8, 0xe7 }, /* Enable AEC, AWB, AEC */
330 { REG_COM22, 0x23 }, /* Edge enhancement, denoising */
334 { REG_DBLC1, 0xdf }, /* Digital BLC */
335 { REG_DBLC_B, 0x00 }, /* Digital BLC B chan offset */
336 { REG_DBLC_R, 0x00 }, /* Digital BLC R chan offset */
337 { REG_DBLC_GB, 0x00 }, /* Digital BLC GB chan offset */
338 { REG_DBLC_GR, 0x00 },
339 { REG_COM9, 0x3a }, /* Gain ceiling 16x */
343 #define NUM_FMT_REGS 14
345 * COM7, COM3, COM4, HSTART, HSTOP, HREF, VSTART, VSTOP, VREF,
346 * EXHCH, EXHCL, ADC, OCOM, OFON
348 static const u8 frame_size_reg_addr[NUM_FMT_REGS] = {
349 0x12, 0x0c, 0x0d, 0x17, 0x18, 0x32, 0x19, 0x1a, 0x03,
350 0x2a, 0x2b, 0x37, 0x38, 0x39,
353 static const u8 ov965x_sxga_regs[NUM_FMT_REGS] = {
354 0x00, 0x00, 0x00, 0x1e, 0xbe, 0xbf, 0x01, 0x81, 0x12,
355 0x10, 0x34, 0x81, 0x93, 0x51,
358 static const u8 ov965x_vga_regs[NUM_FMT_REGS] = {
359 0x40, 0x04, 0x80, 0x26, 0xc6, 0xed, 0x01, 0x3d, 0x00,
360 0x10, 0x40, 0x91, 0x12, 0x43,
363 /* Determined empirically. */
364 static const u8 ov965x_qvga_regs[NUM_FMT_REGS] = {
365 0x10, 0x04, 0x80, 0x25, 0xc5, 0xbf, 0x00, 0x80, 0x12,
366 0x10, 0x40, 0x91, 0x12, 0x43,
369 static const struct ov965x_framesize ov965x_framesizes[] = {
372 .height = SXGA_HEIGHT,
373 .regs = ov965x_sxga_regs,
374 .max_exp_lines = 1048,
377 .height = VGA_HEIGHT,
378 .regs = ov965x_vga_regs,
379 .max_exp_lines = 498,
382 .height = QVGA_HEIGHT,
383 .regs = ov965x_qvga_regs,
384 .max_exp_lines = 248,
388 struct ov965x_pixfmt {
391 /* REG_TSLB value, only bits [3:2] may be set. */
395 static const struct ov965x_pixfmt ov965x_formats[] = {
396 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG, 0x00},
397 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG, 0x04},
398 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG, 0x0c},
399 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG, 0x08},
403 * This table specifies possible frame resolution and interval
404 * combinations. Default CLKRC[5:0] divider values are valid
405 * only for 24 MHz external clock frequency.
407 static struct ov965x_interval ov965x_intervals[] = {
408 {{ 100, 625 }, { SXGA_WIDTH, SXGA_HEIGHT }, 0 }, /* 6.25 fps */
409 {{ 10, 125 }, { VGA_WIDTH, VGA_HEIGHT }, 1 }, /* 12.5 fps */
410 {{ 10, 125 }, { QVGA_WIDTH, QVGA_HEIGHT }, 3 }, /* 12.5 fps */
411 {{ 1, 25 }, { VGA_WIDTH, VGA_HEIGHT }, 0 }, /* 25 fps */
412 {{ 1, 25 }, { QVGA_WIDTH, QVGA_HEIGHT }, 1 }, /* 25 fps */
415 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
417 return &container_of(ctrl->handler, struct ov965x, ctrls.handler)->sd;
420 static inline struct ov965x *to_ov965x(struct v4l2_subdev *sd)
422 return container_of(sd, struct ov965x, sd);
425 static int ov965x_read(struct ov965x *ov965x, u8 addr, u8 *val)
430 ret = regmap_read(ov965x->regmap, addr, &buf);
436 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02x. (%d)\n",
437 __func__, *val, addr, ret);
442 static int ov965x_write(struct ov965x *ov965x, u8 addr, u8 val)
446 ret = regmap_write(ov965x->regmap, addr, val);
448 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02X (%d)\n",
449 __func__, val, addr, ret);
454 static int ov965x_write_array(struct ov965x *ov965x,
455 const struct i2c_rv *regs)
459 for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
460 ret = ov965x_write(ov965x, regs[i].addr, regs[i].value);
465 static int ov965x_set_default_gamma_curve(struct ov965x *ov965x)
467 static const u8 gamma_curve[] = {
468 /* Values taken from OV application note. */
469 0x40, 0x30, 0x4b, 0x60, 0x70, 0x70, 0x70, 0x70,
470 0x60, 0x60, 0x50, 0x48, 0x3a, 0x2e, 0x28, 0x22,
471 0x04, 0x07, 0x10, 0x28, 0x36, 0x44, 0x52, 0x60,
472 0x6c, 0x78, 0x8c, 0x9e, 0xbb, 0xd2, 0xe6
477 for (i = 0; i < ARRAY_SIZE(gamma_curve); i++) {
478 int ret = ov965x_write(ov965x, addr, gamma_curve[i]);
488 static int ov965x_set_color_matrix(struct ov965x *ov965x)
490 static const u8 mtx[] = {
491 /* MTX1..MTX9, MTXS */
492 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38, 0x40, 0x40, 0x40, 0x0d
494 u8 addr = REG_MTX(1);
497 for (i = 0; i < ARRAY_SIZE(mtx); i++) {
498 int ret = ov965x_write(ov965x, addr, mtx[i]);
508 static int __ov965x_set_power(struct ov965x *ov965x, int on)
511 int ret = clk_prepare_enable(ov965x->clk);
516 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 0);
517 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 0);
520 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 1);
521 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 1);
523 clk_disable_unprepare(ov965x->clk);
526 ov965x->streaming = 0;
531 static int ov965x_s_power(struct v4l2_subdev *sd, int on)
533 struct ov965x *ov965x = to_ov965x(sd);
536 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on);
538 mutex_lock(&ov965x->lock);
539 if (ov965x->power == !on) {
540 ret = __ov965x_set_power(ov965x, on);
542 ret = ov965x_write_array(ov965x,
544 ov965x->apply_frame_fmt = 1;
545 ov965x->ctrls.update = 1;
549 ov965x->power += on ? 1 : -1;
551 WARN_ON(ov965x->power < 0);
552 mutex_unlock(&ov965x->lock);
560 static void ov965x_update_exposure_ctrl(struct ov965x *ov965x)
562 struct v4l2_ctrl *ctrl = ov965x->ctrls.exposure;
563 unsigned long fint, trow;
567 mutex_lock(&ov965x->lock);
568 if (WARN_ON(!ctrl || !ov965x->frame_size)) {
569 mutex_unlock(&ov965x->lock);
572 clkrc = DEF_CLKRC + ov965x->fiv->clkrc_div;
573 /* Calculate internal clock frequency */
574 fint = ov965x->mclk_frequency * ((clkrc >> 7) + 1) /
575 ((2 * ((clkrc & 0x3f) + 1)));
576 /* and the row interval (in us). */
577 trow = (2 * 1520 * 1000000UL) / fint;
578 max = ov965x->frame_size->max_exp_lines * trow;
579 ov965x->exp_row_interval = trow;
580 mutex_unlock(&ov965x->lock);
582 v4l2_dbg(1, debug, &ov965x->sd, "clkrc: %#x, fi: %lu, tr: %lu, %d\n",
583 clkrc, fint, trow, max);
585 /* Update exposure time range to match current frame format. */
586 min = (trow + 100) / 100;
587 max = (max - 100) / 100;
588 def = min + (max - min) / 2;
590 if (v4l2_ctrl_modify_range(ctrl, min, max, 1, def))
591 v4l2_err(&ov965x->sd, "Exposure ctrl range update failed\n");
594 static int ov965x_set_banding_filter(struct ov965x *ov965x, int value)
596 unsigned long mbd, light_freq;
600 ret = ov965x_read(ov965x, REG_COM8, ®);
602 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED)
606 ret = ov965x_write(ov965x, REG_COM8, reg);
608 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED)
610 if (WARN_ON(!ov965x->fiv))
612 /* Set minimal exposure time for 50/60 HZ lighting */
613 if (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ)
617 mbd = (1000UL * ov965x->fiv->interval.denominator *
618 ov965x->frame_size->max_exp_lines) /
619 ov965x->fiv->interval.numerator;
620 mbd = ((mbd / (light_freq * 2)) + 500) / 1000UL;
622 return ov965x_write(ov965x, REG_MBD, mbd);
625 static int ov965x_set_white_balance(struct ov965x *ov965x, int awb)
630 ret = ov965x_read(ov965x, REG_COM8, ®);
632 reg = awb ? reg | REG_COM8 : reg & ~REG_COM8;
633 ret = ov965x_write(ov965x, REG_COM8, reg);
636 ret = ov965x_write(ov965x, REG_BLUE,
637 ov965x->ctrls.blue_balance->val);
640 ret = ov965x_write(ov965x, REG_RED,
641 ov965x->ctrls.red_balance->val);
646 #define NUM_BR_LEVELS 7
647 #define NUM_BR_REGS 3
649 static int ov965x_set_brightness(struct ov965x *ov965x, int val)
651 static const u8 regs[NUM_BR_LEVELS + 1][NUM_BR_REGS] = {
652 { REG_AEW, REG_AEB, REG_VPT },
653 { 0x1c, 0x12, 0x50 }, /* -3 */
654 { 0x3d, 0x30, 0x71 }, /* -2 */
655 { 0x50, 0x44, 0x92 }, /* -1 */
656 { 0x70, 0x64, 0xc3 }, /* 0 */
657 { 0x90, 0x84, 0xd4 }, /* +1 */
658 { 0xc4, 0xbf, 0xf9 }, /* +2 */
659 { 0xd8, 0xd0, 0xfa }, /* +3 */
663 val += (NUM_BR_LEVELS / 2 + 1);
664 if (val > NUM_BR_LEVELS)
667 for (i = 0; i < NUM_BR_REGS && !ret; i++)
668 ret = ov965x_write(ov965x, regs[0][i],
673 static int ov965x_set_gain(struct ov965x *ov965x, int auto_gain)
675 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
679 * For manual mode we need to disable AGC first, so
680 * gain value in REG_VREF, REG_GAIN is not overwritten.
682 if (ctrls->auto_gain->is_new) {
683 ret = ov965x_read(ov965x, REG_COM8, ®);
686 if (ctrls->auto_gain->val)
690 ret = ov965x_write(ov965x, REG_COM8, reg);
695 if (ctrls->gain->is_new && !auto_gain) {
696 unsigned int gain = ctrls->gain->val;
700 * Convert gain control value to the sensor's gain
701 * registers (VREF[7:6], GAIN[7:0]) format.
703 for (m = 6; m >= 0; m--)
704 if (gain >= (1 << m) * 16)
706 rgain = (gain - ((1 << m) * 16)) / (1 << m);
707 rgain |= (((1 << m) - 1) << 4);
709 ret = ov965x_write(ov965x, REG_GAIN, rgain & 0xff);
712 ret = ov965x_read(ov965x, REG_VREF, ®);
715 reg &= ~VREF_GAIN_MASK;
716 reg |= (((rgain >> 8) & 0x3) << 6);
717 ret = ov965x_write(ov965x, REG_VREF, reg);
720 /* Return updated control's value to userspace */
721 ctrls->gain->val = (1 << m) * (16 + (rgain & 0xf));
727 static int ov965x_set_sharpness(struct ov965x *ov965x, unsigned int value)
732 ret = ov965x_read(ov965x, REG_COM14, &com14);
735 ret = ov965x_read(ov965x, REG_EDGE, &edge);
738 com14 = value ? com14 | COM14_EDGE_EN : com14 & ~COM14_EDGE_EN;
741 com14 |= COM14_EEF_X2;
744 com14 &= ~COM14_EEF_X2;
746 ret = ov965x_write(ov965x, REG_COM14, com14);
750 edge &= ~EDGE_FACTOR_MASK;
751 edge |= ((u8)value & 0x0f);
753 return ov965x_write(ov965x, REG_EDGE, edge);
756 static int ov965x_set_exposure(struct ov965x *ov965x, int exp)
758 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
759 bool auto_exposure = (exp == V4L2_EXPOSURE_AUTO);
763 if (ctrls->auto_exp->is_new) {
764 ret = ov965x_read(ov965x, REG_COM8, ®);
768 reg |= (COM8_AEC | COM8_AGC);
770 reg &= ~(COM8_AEC | COM8_AGC);
771 ret = ov965x_write(ov965x, REG_COM8, reg);
776 if (!auto_exposure && ctrls->exposure->is_new) {
777 unsigned int exposure = (ctrls->exposure->val * 100)
778 / ov965x->exp_row_interval;
780 * Manual exposure value
781 * [b15:b0] - AECHM (b15:b10), AECH (b9:b2), COM1 (b1:b0)
783 ret = ov965x_write(ov965x, REG_COM1, exposure & 0x3);
785 ret = ov965x_write(ov965x, REG_AECH,
786 (exposure >> 2) & 0xff);
788 ret = ov965x_write(ov965x, REG_AECHM,
789 (exposure >> 10) & 0x3f);
790 /* Update the value to minimize rounding errors */
791 ctrls->exposure->val = ((exposure * ov965x->exp_row_interval)
797 v4l2_ctrl_activate(ov965x->ctrls.brightness, !exp);
801 static int ov965x_set_flip(struct ov965x *ov965x)
805 if (ov965x->ctrls.hflip->val)
808 if (ov965x->ctrls.vflip->val)
811 return ov965x_write(ov965x, REG_MVFP, mvfp);
814 #define NUM_SAT_LEVELS 5
815 #define NUM_SAT_REGS 6
817 static int ov965x_set_saturation(struct ov965x *ov965x, int val)
819 static const u8 regs[NUM_SAT_LEVELS][NUM_SAT_REGS] = {
820 /* MTX(1)...MTX(6) */
821 { 0x1d, 0x1f, 0x02, 0x09, 0x13, 0x1c }, /* -2 */
822 { 0x2e, 0x31, 0x02, 0x0e, 0x1e, 0x2d }, /* -1 */
823 { 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38 }, /* 0 */
824 { 0x46, 0x49, 0x04, 0x16, 0x2e, 0x43 }, /* +1 */
825 { 0x57, 0x5c, 0x05, 0x1b, 0x39, 0x54 }, /* +2 */
827 u8 addr = REG_MTX(1);
830 val += (NUM_SAT_LEVELS / 2);
831 if (val >= NUM_SAT_LEVELS)
834 for (i = 0; i < NUM_SAT_REGS && !ret; i++)
835 ret = ov965x_write(ov965x, addr + i, regs[val][i]);
840 static int ov965x_set_test_pattern(struct ov965x *ov965x, int value)
845 ret = ov965x_read(ov965x, REG_COM23, ®);
848 reg = value ? reg | COM23_TEST_MODE : reg & ~COM23_TEST_MODE;
849 return ov965x_write(ov965x, REG_COM23, reg);
852 static int __g_volatile_ctrl(struct ov965x *ov965x, struct v4l2_ctrl *ctrl)
854 unsigned int exposure, gain, m;
862 case V4L2_CID_AUTOGAIN:
865 ret = ov965x_read(ov965x, REG_GAIN, ®0);
868 ret = ov965x_read(ov965x, REG_VREF, ®1);
871 gain = ((reg1 >> 6) << 8) | reg0;
872 m = 0x01 << fls(gain >> 4);
873 ov965x->ctrls.gain->val = m * (16 + (gain & 0xf));
876 case V4L2_CID_EXPOSURE_AUTO:
877 if (ctrl->val == V4L2_EXPOSURE_MANUAL)
879 ret = ov965x_read(ov965x, REG_COM1, ®0);
882 ret = ov965x_read(ov965x, REG_AECH, ®1);
885 ret = ov965x_read(ov965x, REG_AECHM, ®2);
888 exposure = ((reg2 & 0x3f) << 10) | (reg1 << 2) |
890 ov965x->ctrls.exposure->val = ((exposure *
891 ov965x->exp_row_interval) + 50) / 100;
898 static int ov965x_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
900 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
901 struct ov965x *ov965x = to_ov965x(sd);
904 v4l2_dbg(1, debug, sd, "g_ctrl: %s\n", ctrl->name);
906 mutex_lock(&ov965x->lock);
907 ret = __g_volatile_ctrl(ov965x, ctrl);
908 mutex_unlock(&ov965x->lock);
912 static int ov965x_s_ctrl(struct v4l2_ctrl *ctrl)
914 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
915 struct ov965x *ov965x = to_ov965x(sd);
918 v4l2_dbg(1, debug, sd, "s_ctrl: %s, value: %d. power: %d\n",
919 ctrl->name, ctrl->val, ov965x->power);
921 mutex_lock(&ov965x->lock);
923 * If the device is not powered up now postpone applying control's
924 * value to the hardware, until it is ready to accept commands.
926 if (ov965x->power == 0) {
927 mutex_unlock(&ov965x->lock);
932 case V4L2_CID_AUTO_WHITE_BALANCE:
933 ret = ov965x_set_white_balance(ov965x, ctrl->val);
936 case V4L2_CID_BRIGHTNESS:
937 ret = ov965x_set_brightness(ov965x, ctrl->val);
940 case V4L2_CID_EXPOSURE_AUTO:
941 ret = ov965x_set_exposure(ov965x, ctrl->val);
944 case V4L2_CID_AUTOGAIN:
945 ret = ov965x_set_gain(ov965x, ctrl->val);
949 ret = ov965x_set_flip(ov965x);
952 case V4L2_CID_POWER_LINE_FREQUENCY:
953 ret = ov965x_set_banding_filter(ov965x, ctrl->val);
956 case V4L2_CID_SATURATION:
957 ret = ov965x_set_saturation(ov965x, ctrl->val);
960 case V4L2_CID_SHARPNESS:
961 ret = ov965x_set_sharpness(ov965x, ctrl->val);
964 case V4L2_CID_TEST_PATTERN:
965 ret = ov965x_set_test_pattern(ov965x, ctrl->val);
969 mutex_unlock(&ov965x->lock);
973 static const struct v4l2_ctrl_ops ov965x_ctrl_ops = {
974 .g_volatile_ctrl = ov965x_g_volatile_ctrl,
975 .s_ctrl = ov965x_s_ctrl,
978 static const char * const test_pattern_menu[] = {
983 static int ov965x_initialize_controls(struct ov965x *ov965x)
985 const struct v4l2_ctrl_ops *ops = &ov965x_ctrl_ops;
986 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
987 struct v4l2_ctrl_handler *hdl = &ctrls->handler;
990 ret = v4l2_ctrl_handler_init(hdl, 16);
994 /* Auto/manual white balance */
995 ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
996 V4L2_CID_AUTO_WHITE_BALANCE,
998 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
1000 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
1002 /* Auto/manual exposure */
1004 v4l2_ctrl_new_std_menu(hdl, ops,
1005 V4L2_CID_EXPOSURE_AUTO,
1006 V4L2_EXPOSURE_MANUAL, 0,
1007 V4L2_EXPOSURE_AUTO);
1008 /* Exposure time, in 100 us units. min/max is updated dynamically. */
1009 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops,
1010 V4L2_CID_EXPOSURE_ABSOLUTE,
1012 /* Auto/manual gain */
1013 ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
1015 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
1016 16, 64 * (16 + 15), 1, 64 * 16);
1018 ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
1020 ctrls->brightness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS,
1022 ctrls->sharpness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS,
1025 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
1026 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
1029 v4l2_ctrl_new_std_menu(hdl, ops,
1030 V4L2_CID_POWER_LINE_FREQUENCY,
1031 V4L2_CID_POWER_LINE_FREQUENCY_60HZ, ~0x7,
1032 V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
1034 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
1035 ARRAY_SIZE(test_pattern_menu) - 1, 0, 0,
1039 v4l2_ctrl_handler_free(hdl);
1043 ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
1044 ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
1046 v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
1047 v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
1048 v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
1049 v4l2_ctrl_cluster(2, &ctrls->hflip);
1051 ov965x->sd.ctrl_handler = hdl;
1056 * V4L2 subdev video and pad level operations
1058 static void ov965x_get_default_format(struct v4l2_mbus_framefmt *mf)
1060 mf->width = ov965x_framesizes[0].width;
1061 mf->height = ov965x_framesizes[0].height;
1062 mf->colorspace = ov965x_formats[0].colorspace;
1063 mf->code = ov965x_formats[0].code;
1064 mf->field = V4L2_FIELD_NONE;
1067 static int ov965x_enum_mbus_code(struct v4l2_subdev *sd,
1068 struct v4l2_subdev_pad_config *cfg,
1069 struct v4l2_subdev_mbus_code_enum *code)
1071 if (code->index >= ARRAY_SIZE(ov965x_formats))
1074 code->code = ov965x_formats[code->index].code;
1078 static int ov965x_enum_frame_sizes(struct v4l2_subdev *sd,
1079 struct v4l2_subdev_pad_config *cfg,
1080 struct v4l2_subdev_frame_size_enum *fse)
1082 int i = ARRAY_SIZE(ov965x_formats);
1084 if (fse->index >= ARRAY_SIZE(ov965x_framesizes))
1088 if (fse->code == ov965x_formats[i].code)
1091 fse->code = ov965x_formats[i].code;
1093 fse->min_width = ov965x_framesizes[fse->index].width;
1094 fse->max_width = fse->min_width;
1095 fse->max_height = ov965x_framesizes[fse->index].height;
1096 fse->min_height = fse->max_height;
1101 static int ov965x_g_frame_interval(struct v4l2_subdev *sd,
1102 struct v4l2_subdev_frame_interval *fi)
1104 struct ov965x *ov965x = to_ov965x(sd);
1106 mutex_lock(&ov965x->lock);
1107 fi->interval = ov965x->fiv->interval;
1108 mutex_unlock(&ov965x->lock);
1113 static int __ov965x_set_frame_interval(struct ov965x *ov965x,
1114 struct v4l2_subdev_frame_interval *fi)
1116 struct v4l2_mbus_framefmt *mbus_fmt = &ov965x->format;
1117 const struct ov965x_interval *fiv = &ov965x_intervals[0];
1118 u64 req_int, err, min_err = ~0ULL;
1121 if (fi->interval.denominator == 0)
1124 req_int = (u64)fi->interval.numerator * 10000;
1125 do_div(req_int, fi->interval.denominator);
1127 for (i = 0; i < ARRAY_SIZE(ov965x_intervals); i++) {
1128 const struct ov965x_interval *iv = &ov965x_intervals[i];
1130 if (mbus_fmt->width != iv->size.width ||
1131 mbus_fmt->height != iv->size.height)
1133 err = abs((u64)(iv->interval.numerator * 10000) /
1134 iv->interval.denominator - req_int);
1135 if (err < min_err) {
1142 v4l2_dbg(1, debug, &ov965x->sd, "Changed frame interval to %u us\n",
1143 fiv->interval.numerator * 1000000 / fiv->interval.denominator);
1148 static int ov965x_s_frame_interval(struct v4l2_subdev *sd,
1149 struct v4l2_subdev_frame_interval *fi)
1151 struct ov965x *ov965x = to_ov965x(sd);
1154 v4l2_dbg(1, debug, sd, "Setting %d/%d frame interval\n",
1155 fi->interval.numerator, fi->interval.denominator);
1157 mutex_lock(&ov965x->lock);
1158 ret = __ov965x_set_frame_interval(ov965x, fi);
1159 ov965x->apply_frame_fmt = 1;
1160 mutex_unlock(&ov965x->lock);
1164 static int ov965x_get_fmt(struct v4l2_subdev *sd,
1165 struct v4l2_subdev_pad_config *cfg,
1166 struct v4l2_subdev_format *fmt)
1168 struct ov965x *ov965x = to_ov965x(sd);
1169 struct v4l2_mbus_framefmt *mf;
1171 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1172 mf = v4l2_subdev_get_try_format(sd, cfg, 0);
1177 mutex_lock(&ov965x->lock);
1178 fmt->format = ov965x->format;
1179 mutex_unlock(&ov965x->lock);
1184 static void __ov965x_try_frame_size(struct v4l2_mbus_framefmt *mf,
1185 const struct ov965x_framesize **size)
1187 const struct ov965x_framesize *fsize = &ov965x_framesizes[0],
1189 int i = ARRAY_SIZE(ov965x_framesizes);
1190 unsigned int min_err = UINT_MAX;
1193 int err = abs(fsize->width - mf->width)
1194 + abs(fsize->height - mf->height);
1195 if (err < min_err) {
1202 match = &ov965x_framesizes[0];
1203 mf->width = match->width;
1204 mf->height = match->height;
1209 static int ov965x_set_fmt(struct v4l2_subdev *sd,
1210 struct v4l2_subdev_pad_config *cfg,
1211 struct v4l2_subdev_format *fmt)
1213 unsigned int index = ARRAY_SIZE(ov965x_formats);
1214 struct v4l2_mbus_framefmt *mf = &fmt->format;
1215 struct ov965x *ov965x = to_ov965x(sd);
1216 const struct ov965x_framesize *size = NULL;
1219 __ov965x_try_frame_size(mf, &size);
1222 if (ov965x_formats[index].code == mf->code)
1225 mf->colorspace = V4L2_COLORSPACE_JPEG;
1226 mf->code = ov965x_formats[index].code;
1227 mf->field = V4L2_FIELD_NONE;
1229 mutex_lock(&ov965x->lock);
1231 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1233 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1237 if (ov965x->streaming) {
1240 ov965x->frame_size = size;
1241 ov965x->format = fmt->format;
1242 ov965x->tslb_reg = ov965x_formats[index].tslb_reg;
1243 ov965x->apply_frame_fmt = 1;
1247 if (!ret && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1248 struct v4l2_subdev_frame_interval fiv = {
1249 .interval = { 0, 1 }
1251 /* Reset to minimum possible frame interval */
1252 __ov965x_set_frame_interval(ov965x, &fiv);
1254 mutex_unlock(&ov965x->lock);
1257 ov965x_update_exposure_ctrl(ov965x);
1262 static int ov965x_set_frame_size(struct ov965x *ov965x)
1266 for (i = 0; ret == 0 && i < NUM_FMT_REGS; i++)
1267 ret = ov965x_write(ov965x, frame_size_reg_addr[i],
1268 ov965x->frame_size->regs[i]);
1272 static int __ov965x_set_params(struct ov965x *ov965x)
1274 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
1278 if (ov965x->apply_frame_fmt) {
1279 reg = DEF_CLKRC + ov965x->fiv->clkrc_div;
1280 ret = ov965x_write(ov965x, REG_CLKRC, reg);
1283 ret = ov965x_set_frame_size(ov965x);
1286 ret = ov965x_read(ov965x, REG_TSLB, ®);
1289 reg &= ~TSLB_YUYV_MASK;
1290 reg |= ov965x->tslb_reg;
1291 ret = ov965x_write(ov965x, REG_TSLB, reg);
1295 ret = ov965x_set_default_gamma_curve(ov965x);
1298 ret = ov965x_set_color_matrix(ov965x);
1302 * Select manual banding filter, the filter will
1303 * be enabled further if required.
1305 ret = ov965x_read(ov965x, REG_COM11, ®);
1307 reg |= COM11_BANDING;
1308 ret = ov965x_write(ov965x, REG_COM11, reg);
1312 * Banding filter (REG_MBD value) needs to match selected
1313 * resolution and frame rate, so it's always updated here.
1315 return ov965x_set_banding_filter(ov965x, ctrls->light_freq->val);
1318 static int ov965x_s_stream(struct v4l2_subdev *sd, int on)
1320 struct ov965x *ov965x = to_ov965x(sd);
1321 struct ov965x_ctrls *ctrls = &ov965x->ctrls;
1324 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on);
1326 mutex_lock(&ov965x->lock);
1327 if (ov965x->streaming == !on) {
1329 ret = __ov965x_set_params(ov965x);
1331 if (!ret && ctrls->update) {
1333 * ov965x_s_ctrl callback takes the mutex
1334 * so it needs to be released here.
1336 mutex_unlock(&ov965x->lock);
1337 ret = v4l2_ctrl_handler_setup(&ctrls->handler);
1339 mutex_lock(&ov965x->lock);
1344 ret = ov965x_write(ov965x, REG_COM2,
1348 ov965x->streaming += on ? 1 : -1;
1350 WARN_ON(ov965x->streaming < 0);
1351 mutex_unlock(&ov965x->lock);
1357 * V4L2 subdev internal operations
1359 static int ov965x_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1361 struct v4l2_mbus_framefmt *mf =
1362 v4l2_subdev_get_try_format(sd, fh->pad, 0);
1364 ov965x_get_default_format(mf);
1368 static const struct v4l2_subdev_pad_ops ov965x_pad_ops = {
1369 .enum_mbus_code = ov965x_enum_mbus_code,
1370 .enum_frame_size = ov965x_enum_frame_sizes,
1371 .get_fmt = ov965x_get_fmt,
1372 .set_fmt = ov965x_set_fmt,
1375 static const struct v4l2_subdev_video_ops ov965x_video_ops = {
1376 .s_stream = ov965x_s_stream,
1377 .g_frame_interval = ov965x_g_frame_interval,
1378 .s_frame_interval = ov965x_s_frame_interval,
1382 static const struct v4l2_subdev_internal_ops ov965x_sd_internal_ops = {
1383 .open = ov965x_open,
1386 static const struct v4l2_subdev_core_ops ov965x_core_ops = {
1387 .s_power = ov965x_s_power,
1388 .log_status = v4l2_ctrl_subdev_log_status,
1389 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1390 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1393 static const struct v4l2_subdev_ops ov965x_subdev_ops = {
1394 .core = &ov965x_core_ops,
1395 .pad = &ov965x_pad_ops,
1396 .video = &ov965x_video_ops,
1400 * Reset and power down GPIOs configuration
1402 static int ov965x_configure_gpios_pdata(struct ov965x *ov965x,
1403 const struct ov9650_platform_data *pdata)
1406 int gpios[NUM_GPIOS];
1407 struct device *dev = regmap_get_device(ov965x->regmap);
1409 gpios[GPIO_PWDN] = pdata->gpio_pwdn;
1410 gpios[GPIO_RST] = pdata->gpio_reset;
1412 for (i = 0; i < ARRAY_SIZE(ov965x->gpios); i++) {
1413 int gpio = gpios[i];
1415 if (!gpio_is_valid(gpio))
1417 ret = devm_gpio_request_one(dev, gpio,
1418 GPIOF_OUT_INIT_HIGH, "OV965X");
1421 v4l2_dbg(1, debug, &ov965x->sd, "set gpio %d to 1\n", gpio);
1423 gpio_set_value_cansleep(gpio, 1);
1424 gpio_export(gpio, 0);
1425 ov965x->gpios[i] = gpio_to_desc(gpio);
1431 static int ov965x_configure_gpios(struct ov965x *ov965x)
1433 struct device *dev = regmap_get_device(ov965x->regmap);
1435 ov965x->gpios[GPIO_PWDN] = devm_gpiod_get_optional(dev, "powerdown",
1437 if (IS_ERR(ov965x->gpios[GPIO_PWDN])) {
1438 dev_info(dev, "can't get %s GPIO\n", "powerdown");
1439 return PTR_ERR(ov965x->gpios[GPIO_PWDN]);
1442 ov965x->gpios[GPIO_RST] = devm_gpiod_get_optional(dev, "reset",
1444 if (IS_ERR(ov965x->gpios[GPIO_RST])) {
1445 dev_info(dev, "can't get %s GPIO\n", "reset");
1446 return PTR_ERR(ov965x->gpios[GPIO_RST]);
1452 static int ov965x_detect_sensor(struct v4l2_subdev *sd)
1454 struct ov965x *ov965x = to_ov965x(sd);
1458 mutex_lock(&ov965x->lock);
1459 ret = __ov965x_set_power(ov965x, 1);
1465 /* Check sensor revision */
1466 ret = ov965x_read(ov965x, REG_PID, &pid);
1468 ret = ov965x_read(ov965x, REG_VER, &ver);
1470 __ov965x_set_power(ov965x, 0);
1473 ov965x->id = OV965X_ID(pid, ver);
1474 if (ov965x->id == OV9650_ID || ov965x->id == OV9652_ID) {
1475 v4l2_info(sd, "Found OV%04X sensor\n", ov965x->id);
1477 v4l2_err(sd, "Sensor detection failed (%04X, %d)\n",
1483 mutex_unlock(&ov965x->lock);
1488 static int ov965x_probe(struct i2c_client *client,
1489 const struct i2c_device_id *id)
1491 const struct ov9650_platform_data *pdata = client->dev.platform_data;
1492 struct v4l2_subdev *sd;
1493 struct ov965x *ov965x;
1495 static const struct regmap_config ov965x_regmap_config = {
1498 .max_register = 0xab,
1501 ov965x = devm_kzalloc(&client->dev, sizeof(*ov965x), GFP_KERNEL);
1505 ov965x->regmap = devm_regmap_init_sccb(client, &ov965x_regmap_config);
1506 if (IS_ERR(ov965x->regmap)) {
1507 dev_err(&client->dev, "Failed to allocate register map\n");
1508 return PTR_ERR(ov965x->regmap);
1512 if (pdata->mclk_frequency == 0) {
1513 dev_err(&client->dev, "MCLK frequency not specified\n");
1516 ov965x->mclk_frequency = pdata->mclk_frequency;
1518 ret = ov965x_configure_gpios_pdata(ov965x, pdata);
1521 } else if (dev_fwnode(&client->dev)) {
1522 ov965x->clk = devm_clk_get(&client->dev, NULL);
1523 if (IS_ERR(ov965x->clk))
1524 return PTR_ERR(ov965x->clk);
1525 ov965x->mclk_frequency = clk_get_rate(ov965x->clk);
1527 ret = ov965x_configure_gpios(ov965x);
1531 dev_err(&client->dev,
1532 "Neither platform data nor device property specified\n");
1537 mutex_init(&ov965x->lock);
1540 v4l2_i2c_subdev_init(sd, client, &ov965x_subdev_ops);
1541 strscpy(sd->name, DRIVER_NAME, sizeof(sd->name));
1543 sd->internal_ops = &ov965x_sd_internal_ops;
1544 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1545 V4L2_SUBDEV_FL_HAS_EVENTS;
1547 ov965x->pad.flags = MEDIA_PAD_FL_SOURCE;
1548 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1549 ret = media_entity_pads_init(&sd->entity, 1, &ov965x->pad);
1553 ret = ov965x_initialize_controls(ov965x);
1557 ov965x_get_default_format(&ov965x->format);
1558 ov965x->frame_size = &ov965x_framesizes[0];
1559 ov965x->fiv = &ov965x_intervals[0];
1561 ret = ov965x_detect_sensor(sd);
1565 /* Update exposure time min/max to match frame format */
1566 ov965x_update_exposure_ctrl(ov965x);
1568 ret = v4l2_async_register_subdev(sd);
1574 v4l2_ctrl_handler_free(sd->ctrl_handler);
1576 media_entity_cleanup(&sd->entity);
1578 mutex_destroy(&ov965x->lock);
1582 static int ov965x_remove(struct i2c_client *client)
1584 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1585 struct ov965x *ov965x = to_ov965x(sd);
1587 v4l2_async_unregister_subdev(sd);
1588 v4l2_ctrl_handler_free(sd->ctrl_handler);
1589 media_entity_cleanup(&sd->entity);
1590 mutex_destroy(&ov965x->lock);
1595 static const struct i2c_device_id ov965x_id[] = {
1600 MODULE_DEVICE_TABLE(i2c, ov965x_id);
1602 #if IS_ENABLED(CONFIG_OF)
1603 static const struct of_device_id ov965x_of_match[] = {
1604 { .compatible = "ovti,ov9650", },
1605 { .compatible = "ovti,ov9652", },
1608 MODULE_DEVICE_TABLE(of, ov965x_of_match);
1611 static struct i2c_driver ov965x_i2c_driver = {
1613 .name = DRIVER_NAME,
1614 .of_match_table = of_match_ptr(ov965x_of_match),
1616 .probe = ov965x_probe,
1617 .remove = ov965x_remove,
1618 .id_table = ov965x_id,
1621 module_i2c_driver(ov965x_i2c_driver);
1624 MODULE_DESCRIPTION("OV9650/OV9652 CMOS Image Sensor driver");
1625 MODULE_LICENSE("GPL");