| /* |
| * Omnivision OV9650/OV9652 CMOS Image Sensor driver |
| * |
| * Copyright (C) 2013, Sylwester Nawrocki <sylvester.nawrocki@gmail.com> |
| * |
| * Register definitions and initial settings based on a driver written |
| * by Vladimir Fonov. |
| * Copyright (c) 2010, Vladimir Fonov |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/delay.h> |
| #include <linux/gpio.h> |
| #include <linux/i2c.h> |
| #include <linux/kernel.h> |
| #include <linux/media.h> |
| #include <linux/module.h> |
| #include <linux/ratelimit.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/videodev2.h> |
| |
| #include <media/media-entity.h> |
| #include <media/v4l2-async.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-event.h> |
| #include <media/v4l2-image-sizes.h> |
| #include <media/v4l2-subdev.h> |
| #include <media/v4l2-mediabus.h> |
| #include <media/i2c/ov9650.h> |
| |
| static int debug; |
| module_param(debug, int, 0644); |
| MODULE_PARM_DESC(debug, "Debug level (0-2)"); |
| |
| #define DRIVER_NAME "OV9650" |
| |
| /* |
| * OV9650/OV9652 register definitions |
| */ |
| #define REG_GAIN 0x00 /* Gain control, AGC[7:0] */ |
| #define REG_BLUE 0x01 /* AWB - Blue chanel gain */ |
| #define REG_RED 0x02 /* AWB - Red chanel gain */ |
| #define REG_VREF 0x03 /* [7:6] - AGC[9:8], [5:3]/[2:0] */ |
| #define VREF_GAIN_MASK 0xc0 /* - VREF end/start low 3 bits */ |
| #define REG_COM1 0x04 |
| #define COM1_CCIR656 0x40 |
| #define REG_B_AVE 0x05 |
| #define REG_GB_AVE 0x06 |
| #define REG_GR_AVE 0x07 |
| #define REG_R_AVE 0x08 |
| #define REG_COM2 0x09 |
| #define REG_PID 0x0a /* Product ID MSB */ |
| #define REG_VER 0x0b /* Product ID LSB */ |
| #define REG_COM3 0x0c |
| #define COM3_SWAP 0x40 |
| #define COM3_VARIOPIXEL1 0x04 |
| #define REG_COM4 0x0d /* Vario Pixels */ |
| #define COM4_VARIOPIXEL2 0x80 |
| #define REG_COM5 0x0e /* System clock options */ |
| #define COM5_SLAVE_MODE 0x10 |
| #define COM5_SYSTEMCLOCK48MHZ 0x80 |
| #define REG_COM6 0x0f /* HREF & ADBLC options */ |
| #define REG_AECH 0x10 /* Exposure value, AEC[9:2] */ |
| #define REG_CLKRC 0x11 /* Clock control */ |
| #define CLK_EXT 0x40 /* Use external clock directly */ |
| #define CLK_SCALE 0x3f /* Mask for internal clock scale */ |
| #define REG_COM7 0x12 /* SCCB reset, output format */ |
| #define COM7_RESET 0x80 |
| #define COM7_FMT_MASK 0x38 |
| #define COM7_FMT_VGA 0x40 |
| #define COM7_FMT_CIF 0x20 |
| #define COM7_FMT_QVGA 0x10 |
| #define COM7_FMT_QCIF 0x08 |
| #define COM7_RGB 0x04 |
| #define COM7_YUV 0x00 |
| #define COM7_BAYER 0x01 |
| #define COM7_PBAYER 0x05 |
| #define REG_COM8 0x13 /* AGC/AEC options */ |
| #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ |
| #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ |
| #define COM8_BFILT 0x20 /* Band filter enable */ |
| #define COM8_AGC 0x04 /* Auto gain enable */ |
| #define COM8_AWB 0x02 /* White balance enable */ |
| #define COM8_AEC 0x01 /* Auto exposure enable */ |
| #define REG_COM9 0x14 /* Gain ceiling */ |
| #define COM9_GAIN_CEIL_MASK 0x70 /* */ |
| #define REG_COM10 0x15 /* PCLK, HREF, HSYNC signals polarity */ |
| #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ |
| #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ |
| #define COM10_HREF_REV 0x08 /* Reverse HREF */ |
| #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ |
| #define COM10_VS_NEG 0x02 /* VSYNC negative */ |
| #define COM10_HS_NEG 0x01 /* HSYNC negative */ |
| #define REG_HSTART 0x17 /* Horiz start high bits */ |
| #define REG_HSTOP 0x18 /* Horiz stop high bits */ |
| #define REG_VSTART 0x19 /* Vert start high bits */ |
| #define REG_VSTOP 0x1a /* Vert stop high bits */ |
| #define REG_PSHFT 0x1b /* Pixel delay after HREF */ |
| #define REG_MIDH 0x1c /* Manufacturer ID MSB */ |
| #define REG_MIDL 0x1d /* Manufufacturer ID LSB */ |
| #define REG_MVFP 0x1e /* Image mirror/flip */ |
| #define MVFP_MIRROR 0x20 /* Mirror image */ |
| #define MVFP_FLIP 0x10 /* Vertical flip */ |
| #define REG_BOS 0x20 /* B channel Offset */ |
| #define REG_GBOS 0x21 /* Gb channel Offset */ |
| #define REG_GROS 0x22 /* Gr channel Offset */ |
| #define REG_ROS 0x23 /* R channel Offset */ |
| #define REG_AEW 0x24 /* AGC upper limit */ |
| #define REG_AEB 0x25 /* AGC lower limit */ |
| #define REG_VPT 0x26 /* AGC/AEC fast mode op region */ |
| #define REG_BBIAS 0x27 /* B channel output bias */ |
| #define REG_GBBIAS 0x28 /* Gb channel output bias */ |
| #define REG_GRCOM 0x29 /* Analog BLC & regulator */ |
| #define REG_EXHCH 0x2a /* Dummy pixel insert MSB */ |
| #define REG_EXHCL 0x2b /* Dummy pixel insert LSB */ |
| #define REG_RBIAS 0x2c /* R channel output bias */ |
| #define REG_ADVFL 0x2d /* LSB of dummy line insert */ |
| #define REG_ADVFH 0x2e /* MSB of dummy line insert */ |
| #define REG_YAVE 0x2f /* Y/G channel average value */ |
| #define REG_HSYST 0x30 /* HSYNC rising edge delay LSB*/ |
| #define REG_HSYEN 0x31 /* HSYNC falling edge delay LSB*/ |
| #define REG_HREF 0x32 /* HREF pieces */ |
| #define REG_CHLF 0x33 /* reserved */ |
| #define REG_ADC 0x37 /* reserved */ |
| #define REG_ACOM 0x38 /* reserved */ |
| #define REG_OFON 0x39 /* Power down register */ |
| #define OFON_PWRDN 0x08 /* Power down bit */ |
| #define REG_TSLB 0x3a /* YUVU format */ |
| #define TSLB_YUYV_MASK 0x0c /* UYVY or VYUY - see com13 */ |
| #define REG_COM11 0x3b /* Night mode, banding filter enable */ |
| #define COM11_NIGHT 0x80 /* Night mode enable */ |
| #define COM11_NMFR 0x60 /* Two bit NM frame rate */ |
| #define COM11_BANDING 0x01 /* Banding filter */ |
| #define COM11_AEC_REF_MASK 0x18 /* AEC reference area selection */ |
| #define REG_COM12 0x3c /* HREF option, UV average */ |
| #define COM12_HREF 0x80 /* HREF always */ |
| #define REG_COM13 0x3d /* Gamma selection, Color matrix en. */ |
| #define COM13_GAMMA 0x80 /* Gamma enable */ |
| #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ |
| #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ |
| #define REG_COM14 0x3e /* Edge enhancement options */ |
| #define COM14_EDGE_EN 0x02 |
| #define COM14_EEF_X2 0x01 |
| #define REG_EDGE 0x3f /* Edge enhancement factor */ |
| #define EDGE_FACTOR_MASK 0x0f |
| #define REG_COM15 0x40 /* Output range, RGB 555/565 */ |
| #define COM15_R10F0 0x00 /* Data range 10 to F0 */ |
| #define COM15_R01FE 0x80 /* 01 to FE */ |
| #define COM15_R00FF 0xc0 /* 00 to FF */ |
| #define COM15_RGB565 0x10 /* RGB565 output */ |
| #define COM15_RGB555 0x30 /* RGB555 output */ |
| #define COM15_SWAPRB 0x04 /* Swap R&B */ |
| #define REG_COM16 0x41 /* Color matrix coeff options */ |
| #define REG_COM17 0x42 /* Single frame out, banding filter */ |
| /* n = 1...9, 0x4f..0x57 */ |
| #define REG_MTX(__n) (0x4f + (__n) - 1) |
| #define REG_MTXS 0x58 |
| /* Lens Correction Option 1...5, __n = 0...5 */ |
| #define REG_LCC(__n) (0x62 + (__n) - 1) |
| #define LCC5_LCC_ENABLE 0x01 /* LCC5, enable lens correction */ |
| #define LCC5_LCC_COLOR 0x04 |
| #define REG_MANU 0x67 /* Manual U value */ |
| #define REG_MANV 0x68 /* Manual V value */ |
| #define REG_HV 0x69 /* Manual banding filter MSB */ |
| #define REG_MBD 0x6a /* Manual banding filter value */ |
| #define REG_DBLV 0x6b /* reserved */ |
| #define REG_GSP 0x6c /* Gamma curve */ |
| #define GSP_LEN 15 |
| #define REG_GST 0x7c /* Gamma curve */ |
| #define GST_LEN 15 |
| #define REG_COM21 0x8b |
| #define REG_COM22 0x8c /* Edge enhancement, denoising */ |
| #define COM22_WHTPCOR 0x02 /* White pixel correction enable */ |
| #define COM22_WHTPCOROPT 0x01 /* White pixel correction option */ |
| #define COM22_DENOISE 0x10 /* White pixel correction option */ |
| #define REG_COM23 0x8d /* Color bar test, color gain */ |
| #define COM23_TEST_MODE 0x10 |
| #define REG_DBLC1 0x8f /* Digital BLC */ |
| #define REG_DBLC_B 0x90 /* Digital BLC B channel offset */ |
| #define REG_DBLC_R 0x91 /* Digital BLC R channel offset */ |
| #define REG_DM_LNL 0x92 /* Dummy line low 8 bits */ |
| #define REG_DM_LNH 0x93 /* Dummy line high 8 bits */ |
| #define REG_LCCFB 0x9d /* Lens Correction B channel */ |
| #define REG_LCCFR 0x9e /* Lens Correction R channel */ |
| #define REG_DBLC_GB 0x9f /* Digital BLC GB chan offset */ |
| #define REG_DBLC_GR 0xa0 /* Digital BLC GR chan offset */ |
| #define REG_AECHM 0xa1 /* Exposure value - bits AEC[15:10] */ |
| #define REG_BD50ST 0xa2 /* Banding filter value for 50Hz */ |
| #define REG_BD60ST 0xa3 /* Banding filter value for 60Hz */ |
| #define REG_NULL 0xff /* Array end token */ |
| |
| #define DEF_CLKRC 0x80 |
| |
| #define OV965X_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) |
| #define OV9650_ID 0x9650 |
| #define OV9652_ID 0x9652 |
| |
| struct ov965x_ctrls { |
| struct v4l2_ctrl_handler handler; |
| struct { |
| struct v4l2_ctrl *auto_exp; |
| struct v4l2_ctrl *exposure; |
| }; |
| struct { |
| struct v4l2_ctrl *auto_wb; |
| struct v4l2_ctrl *blue_balance; |
| struct v4l2_ctrl *red_balance; |
| }; |
| struct { |
| struct v4l2_ctrl *hflip; |
| struct v4l2_ctrl *vflip; |
| }; |
| struct { |
| struct v4l2_ctrl *auto_gain; |
| struct v4l2_ctrl *gain; |
| }; |
| struct v4l2_ctrl *brightness; |
| struct v4l2_ctrl *saturation; |
| struct v4l2_ctrl *sharpness; |
| struct v4l2_ctrl *light_freq; |
| u8 update; |
| }; |
| |
| struct ov965x_framesize { |
| u16 width; |
| u16 height; |
| u16 max_exp_lines; |
| const u8 *regs; |
| }; |
| |
| struct ov965x_interval { |
| struct v4l2_fract interval; |
| /* Maximum resolution for this interval */ |
| struct v4l2_frmsize_discrete size; |
| u8 clkrc_div; |
| }; |
| |
| enum gpio_id { |
| GPIO_PWDN, |
| GPIO_RST, |
| NUM_GPIOS, |
| }; |
| |
| struct ov965x { |
| struct v4l2_subdev sd; |
| struct media_pad pad; |
| enum v4l2_mbus_type bus_type; |
| int gpios[NUM_GPIOS]; |
| /* External master clock frequency */ |
| unsigned long mclk_frequency; |
| |
| /* Protects the struct fields below */ |
| struct mutex lock; |
| |
| struct i2c_client *client; |
| |
| /* Exposure row interval in us */ |
| unsigned int exp_row_interval; |
| |
| unsigned short id; |
| const struct ov965x_framesize *frame_size; |
| /* YUYV sequence (pixel format) control register */ |
| u8 tslb_reg; |
| struct v4l2_mbus_framefmt format; |
| |
| struct ov965x_ctrls ctrls; |
| /* Pointer to frame rate control data structure */ |
| const struct ov965x_interval *fiv; |
| |
| int streaming; |
| int power; |
| |
| u8 apply_frame_fmt; |
| }; |
| |
| struct i2c_rv { |
| u8 addr; |
| u8 value; |
| }; |
| |
| static const struct i2c_rv ov965x_init_regs[] = { |
| { REG_COM2, 0x10 }, /* Set soft sleep mode */ |
| { REG_COM5, 0x00 }, /* System clock options */ |
| { REG_COM2, 0x01 }, /* Output drive, soft sleep mode */ |
| { REG_COM10, 0x00 }, /* Slave mode, HREF vs HSYNC, signals negate */ |
| { REG_EDGE, 0xa6 }, /* Edge enhancement treshhold and factor */ |
| { REG_COM16, 0x02 }, /* Color matrix coeff double option */ |
| { REG_COM17, 0x08 }, /* Single frame out, banding filter */ |
| { 0x16, 0x06 }, |
| { REG_CHLF, 0xc0 }, /* Reserved */ |
| { 0x34, 0xbf }, |
| { 0xa8, 0x80 }, |
| { 0x96, 0x04 }, |
| { 0x8e, 0x00 }, |
| { REG_COM12, 0x77 }, /* HREF option, UV average */ |
| { 0x8b, 0x06 }, |
| { 0x35, 0x91 }, |
| { 0x94, 0x88 }, |
| { 0x95, 0x88 }, |
| { REG_COM15, 0xc1 }, /* Output range, RGB 555/565 */ |
| { REG_GRCOM, 0x2f }, /* Analog BLC & regulator */ |
| { REG_COM6, 0x43 }, /* HREF & ADBLC options */ |
| { REG_COM8, 0xe5 }, /* AGC/AEC options */ |
| { REG_COM13, 0x90 }, /* Gamma selection, colour matrix, UV delay */ |
| { REG_HV, 0x80 }, /* Manual banding filter MSB */ |
| { 0x5c, 0x96 }, /* Reserved up to 0xa5 */ |
| { 0x5d, 0x96 }, |
| { 0x5e, 0x10 }, |
| { 0x59, 0xeb }, |
| { 0x5a, 0x9c }, |
| { 0x5b, 0x55 }, |
| { 0x43, 0xf0 }, |
| { 0x44, 0x10 }, |
| { 0x45, 0x55 }, |
| { 0x46, 0x86 }, |
| { 0x47, 0x64 }, |
| { 0x48, 0x86 }, |
| { 0x5f, 0xe0 }, |
| { 0x60, 0x8c }, |
| { 0x61, 0x20 }, |
| { 0xa5, 0xd9 }, |
| { 0xa4, 0x74 }, /* reserved */ |
| { REG_COM23, 0x02 }, /* Color gain analog/_digital_ */ |
| { REG_COM8, 0xe7 }, /* Enable AEC, AWB, AEC */ |
| { REG_COM22, 0x23 }, /* Edge enhancement, denoising */ |
| { 0xa9, 0xb8 }, |
| { 0xaa, 0x92 }, |
| { 0xab, 0x0a }, |
| { REG_DBLC1, 0xdf }, /* Digital BLC */ |
| { REG_DBLC_B, 0x00 }, /* Digital BLC B chan offset */ |
| { REG_DBLC_R, 0x00 }, /* Digital BLC R chan offset */ |
| { REG_DBLC_GB, 0x00 }, /* Digital BLC GB chan offset */ |
| { REG_DBLC_GR, 0x00 }, |
| { REG_COM9, 0x3a }, /* Gain ceiling 16x */ |
| { REG_NULL, 0 } |
| }; |
| |
| #define NUM_FMT_REGS 14 |
| /* |
| * COM7, COM3, COM4, HSTART, HSTOP, HREF, VSTART, VSTOP, VREF, |
| * EXHCH, EXHCL, ADC, OCOM, OFON |
| */ |
| static const u8 frame_size_reg_addr[NUM_FMT_REGS] = { |
| 0x12, 0x0c, 0x0d, 0x17, 0x18, 0x32, 0x19, 0x1a, 0x03, |
| 0x2a, 0x2b, 0x37, 0x38, 0x39, |
| }; |
| |
| static const u8 ov965x_sxga_regs[NUM_FMT_REGS] = { |
| 0x00, 0x00, 0x00, 0x1e, 0xbe, 0xbf, 0x01, 0x81, 0x12, |
| 0x10, 0x34, 0x81, 0x93, 0x51, |
| }; |
| |
| static const u8 ov965x_vga_regs[NUM_FMT_REGS] = { |
| 0x40, 0x04, 0x80, 0x26, 0xc6, 0xed, 0x01, 0x3d, 0x00, |
| 0x10, 0x40, 0x91, 0x12, 0x43, |
| }; |
| |
| /* Determined empirically. */ |
| static const u8 ov965x_qvga_regs[NUM_FMT_REGS] = { |
| 0x10, 0x04, 0x80, 0x25, 0xc5, 0xbf, 0x00, 0x80, 0x12, |
| 0x10, 0x40, 0x91, 0x12, 0x43, |
| }; |
| |
| static const struct ov965x_framesize ov965x_framesizes[] = { |
| { |
| .width = SXGA_WIDTH, |
| .height = SXGA_HEIGHT, |
| .regs = ov965x_sxga_regs, |
| .max_exp_lines = 1048, |
| }, { |
| .width = VGA_WIDTH, |
| .height = VGA_HEIGHT, |
| .regs = ov965x_vga_regs, |
| .max_exp_lines = 498, |
| }, { |
| .width = QVGA_WIDTH, |
| .height = QVGA_HEIGHT, |
| .regs = ov965x_qvga_regs, |
| .max_exp_lines = 248, |
| }, |
| }; |
| |
| struct ov965x_pixfmt { |
| u32 code; |
| u32 colorspace; |
| /* REG_TSLB value, only bits [3:2] may be set. */ |
| u8 tslb_reg; |
| }; |
| |
| static const struct ov965x_pixfmt ov965x_formats[] = { |
| { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG, 0x00}, |
| { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG, 0x04}, |
| { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG, 0x0c}, |
| { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG, 0x08}, |
| }; |
| |
| /* |
| * This table specifies possible frame resolution and interval |
| * combinations. Default CLKRC[5:0] divider values are valid |
| * only for 24 MHz external clock frequency. |
| */ |
| static struct ov965x_interval ov965x_intervals[] = { |
| {{ 100, 625 }, { SXGA_WIDTH, SXGA_HEIGHT }, 0 }, /* 6.25 fps */ |
| {{ 10, 125 }, { VGA_WIDTH, VGA_HEIGHT }, 1 }, /* 12.5 fps */ |
| {{ 10, 125 }, { QVGA_WIDTH, QVGA_HEIGHT }, 3 }, /* 12.5 fps */ |
| {{ 1, 25 }, { VGA_WIDTH, VGA_HEIGHT }, 0 }, /* 25 fps */ |
| {{ 1, 25 }, { QVGA_WIDTH, QVGA_HEIGHT }, 1 }, /* 25 fps */ |
| }; |
| |
| static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) |
| { |
| return &container_of(ctrl->handler, struct ov965x, ctrls.handler)->sd; |
| } |
| |
| static inline struct ov965x *to_ov965x(struct v4l2_subdev *sd) |
| { |
| return container_of(sd, struct ov965x, sd); |
| } |
| |
| static int ov965x_read(struct i2c_client *client, u8 addr, u8 *val) |
| { |
| u8 buf = addr; |
| struct i2c_msg msg = { |
| .addr = client->addr, |
| .flags = 0, |
| .len = 1, |
| .buf = &buf |
| }; |
| int ret; |
| |
| ret = i2c_transfer(client->adapter, &msg, 1); |
| if (ret == 1) { |
| msg.flags = I2C_M_RD; |
| ret = i2c_transfer(client->adapter, &msg, 1); |
| |
| if (ret == 1) |
| *val = buf; |
| } |
| |
| v4l2_dbg(2, debug, client, "%s: 0x%02x @ 0x%02x. (%d)\n", |
| __func__, *val, addr, ret); |
| |
| return ret == 1 ? 0 : ret; |
| } |
| |
| static int ov965x_write(struct i2c_client *client, u8 addr, u8 val) |
| { |
| u8 buf[2] = { addr, val }; |
| |
| int ret = i2c_master_send(client, buf, 2); |
| |
| v4l2_dbg(2, debug, client, "%s: 0x%02x @ 0x%02X (%d)\n", |
| __func__, val, addr, ret); |
| |
| return ret == 2 ? 0 : ret; |
| } |
| |
| static int ov965x_write_array(struct i2c_client *client, |
| const struct i2c_rv *regs) |
| { |
| int i, ret = 0; |
| |
| for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) |
| ret = ov965x_write(client, regs[i].addr, regs[i].value); |
| |
| return ret; |
| } |
| |
| static int ov965x_set_default_gamma_curve(struct ov965x *ov965x) |
| { |
| static const u8 gamma_curve[] = { |
| /* Values taken from OV application note. */ |
| 0x40, 0x30, 0x4b, 0x60, 0x70, 0x70, 0x70, 0x70, |
| 0x60, 0x60, 0x50, 0x48, 0x3a, 0x2e, 0x28, 0x22, |
| 0x04, 0x07, 0x10, 0x28, 0x36, 0x44, 0x52, 0x60, |
| 0x6c, 0x78, 0x8c, 0x9e, 0xbb, 0xd2, 0xe6 |
| }; |
| u8 addr = REG_GSP; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gamma_curve); i++) { |
| int ret = ov965x_write(ov965x->client, addr, gamma_curve[i]); |
| |
| if (ret < 0) |
| return ret; |
| addr++; |
| } |
| |
| return 0; |
| }; |
| |
| static int ov965x_set_color_matrix(struct ov965x *ov965x) |
| { |
| static const u8 mtx[] = { |
| /* MTX1..MTX9, MTXS */ |
| 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38, 0x40, 0x40, 0x40, 0x0d |
| }; |
| u8 addr = REG_MTX(1); |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mtx); i++) { |
| int ret = ov965x_write(ov965x->client, addr, mtx[i]); |
| |
| if (ret < 0) |
| return ret; |
| addr++; |
| } |
| |
| return 0; |
| } |
| |
| static void ov965x_gpio_set(int gpio, int val) |
| { |
| if (gpio_is_valid(gpio)) |
| gpio_set_value(gpio, val); |
| } |
| |
| static void __ov965x_set_power(struct ov965x *ov965x, int on) |
| { |
| if (on) { |
| ov965x_gpio_set(ov965x->gpios[GPIO_PWDN], 0); |
| ov965x_gpio_set(ov965x->gpios[GPIO_RST], 0); |
| msleep(25); |
| } else { |
| ov965x_gpio_set(ov965x->gpios[GPIO_RST], 1); |
| ov965x_gpio_set(ov965x->gpios[GPIO_PWDN], 1); |
| } |
| |
| ov965x->streaming = 0; |
| } |
| |
| static int ov965x_s_power(struct v4l2_subdev *sd, int on) |
| { |
| struct ov965x *ov965x = to_ov965x(sd); |
| struct i2c_client *client = ov965x->client; |
| int ret = 0; |
| |
| v4l2_dbg(1, debug, client, "%s: on: %d\n", __func__, on); |
| |
| mutex_lock(&ov965x->lock); |
| if (ov965x->power == !on) { |
| __ov965x_set_power(ov965x, on); |
| if (on) { |
| ret = ov965x_write_array(client, |
| ov965x_init_regs); |
| ov965x->apply_frame_fmt = 1; |
| ov965x->ctrls.update = 1; |
| } |
| } |
| if (!ret) |
| ov965x->power += on ? 1 : -1; |
| |
| WARN_ON(ov965x->power < 0); |
| mutex_unlock(&ov965x->lock); |
| return ret; |
| } |
| |
| /* |
| * V4L2 controls |
| */ |
| |
| static void ov965x_update_exposure_ctrl(struct ov965x *ov965x) |
| { |
| struct v4l2_ctrl *ctrl = ov965x->ctrls.exposure; |
| unsigned long fint, trow; |
| int min, max, def; |
| u8 clkrc; |
| |
| mutex_lock(&ov965x->lock); |
| if (WARN_ON(!ctrl || !ov965x->frame_size)) { |
| mutex_unlock(&ov965x->lock); |
| return; |
| } |
| clkrc = DEF_CLKRC + ov965x->fiv->clkrc_div; |
| /* Calculate internal clock frequency */ |
| fint = ov965x->mclk_frequency * ((clkrc >> 7) + 1) / |
| ((2 * ((clkrc & 0x3f) + 1))); |
| /* and the row interval (in us). */ |
| trow = (2 * 1520 * 1000000UL) / fint; |
| max = ov965x->frame_size->max_exp_lines * trow; |
| ov965x->exp_row_interval = trow; |
| mutex_unlock(&ov965x->lock); |
| |
| v4l2_dbg(1, debug, &ov965x->sd, "clkrc: %#x, fi: %lu, tr: %lu, %d\n", |
| clkrc, fint, trow, max); |
| |
| /* Update exposure time range to match current frame format. */ |
| min = (trow + 100) / 100; |
| max = (max - 100) / 100; |
| def = min + (max - min) / 2; |
| |
| if (v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) |
| v4l2_err(&ov965x->sd, "Exposure ctrl range update failed\n"); |
| } |
| |
| static int ov965x_set_banding_filter(struct ov965x *ov965x, int value) |
| { |
| unsigned long mbd, light_freq; |
| int ret; |
| u8 reg; |
| |
| ret = ov965x_read(ov965x->client, REG_COM8, ®); |
| if (!ret) { |
| if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED) |
| reg &= ~COM8_BFILT; |
| else |
| reg |= COM8_BFILT; |
| ret = ov965x_write(ov965x->client, REG_COM8, reg); |
| } |
| if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED) |
| return 0; |
| if (WARN_ON(!ov965x->fiv)) |
| return -EINVAL; |
| /* Set minimal exposure time for 50/60 HZ lighting */ |
| if (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) |
| light_freq = 50; |
| else |
| light_freq = 60; |
| mbd = (1000UL * ov965x->fiv->interval.denominator * |
| ov965x->frame_size->max_exp_lines) / |
| ov965x->fiv->interval.numerator; |
| mbd = ((mbd / (light_freq * 2)) + 500) / 1000UL; |
| |
| return ov965x_write(ov965x->client, REG_MBD, mbd); |
| } |
| |
| static int ov965x_set_white_balance(struct ov965x *ov965x, int awb) |
| { |
| int ret; |
| u8 reg; |
| |
| ret = ov965x_read(ov965x->client, REG_COM8, ®); |
| if (!ret) { |
| reg = awb ? reg | REG_COM8 : reg & ~REG_COM8; |
| ret = ov965x_write(ov965x->client, REG_COM8, reg); |
| } |
| if (!ret && !awb) { |
| ret = ov965x_write(ov965x->client, REG_BLUE, |
| ov965x->ctrls.blue_balance->val); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_write(ov965x->client, REG_RED, |
| ov965x->ctrls.red_balance->val); |
| } |
| return ret; |
| } |
| |
| #define NUM_BR_LEVELS 7 |
| #define NUM_BR_REGS 3 |
| |
| static int ov965x_set_brightness(struct ov965x *ov965x, int val) |
| { |
| static const u8 regs[NUM_BR_LEVELS + 1][NUM_BR_REGS] = { |
| { REG_AEW, REG_AEB, REG_VPT }, |
| { 0x1c, 0x12, 0x50 }, /* -3 */ |
| { 0x3d, 0x30, 0x71 }, /* -2 */ |
| { 0x50, 0x44, 0x92 }, /* -1 */ |
| { 0x70, 0x64, 0xc3 }, /* 0 */ |
| { 0x90, 0x84, 0xd4 }, /* +1 */ |
| { 0xc4, 0xbf, 0xf9 }, /* +2 */ |
| { 0xd8, 0xd0, 0xfa }, /* +3 */ |
| }; |
| int i, ret = 0; |
| |
| val += (NUM_BR_LEVELS / 2 + 1); |
| if (val > NUM_BR_LEVELS) |
| return -EINVAL; |
| |
| for (i = 0; i < NUM_BR_REGS && !ret; i++) |
| ret = ov965x_write(ov965x->client, regs[0][i], |
| regs[val][i]); |
| return ret; |
| } |
| |
| static int ov965x_set_gain(struct ov965x *ov965x, int auto_gain) |
| { |
| struct i2c_client *client = ov965x->client; |
| struct ov965x_ctrls *ctrls = &ov965x->ctrls; |
| int ret = 0; |
| u8 reg; |
| /* |
| * For manual mode we need to disable AGC first, so |
| * gain value in REG_VREF, REG_GAIN is not overwritten. |
| */ |
| if (ctrls->auto_gain->is_new) { |
| ret = ov965x_read(client, REG_COM8, ®); |
| if (ret < 0) |
| return ret; |
| if (ctrls->auto_gain->val) |
| reg |= COM8_AGC; |
| else |
| reg &= ~COM8_AGC; |
| ret = ov965x_write(client, REG_COM8, reg); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (ctrls->gain->is_new && !auto_gain) { |
| unsigned int gain = ctrls->gain->val; |
| unsigned int rgain; |
| int m; |
| /* |
| * Convert gain control value to the sensor's gain |
| * registers (VREF[7:6], GAIN[7:0]) format. |
| */ |
| for (m = 6; m >= 0; m--) |
| if (gain >= (1 << m) * 16) |
| break; |
| rgain = (gain - ((1 << m) * 16)) / (1 << m); |
| rgain |= (((1 << m) - 1) << 4); |
| |
| ret = ov965x_write(client, REG_GAIN, rgain & 0xff); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_read(client, REG_VREF, ®); |
| if (ret < 0) |
| return ret; |
| reg &= ~VREF_GAIN_MASK; |
| reg |= (((rgain >> 8) & 0x3) << 6); |
| ret = ov965x_write(client, REG_VREF, reg); |
| if (ret < 0) |
| return ret; |
| /* Return updated control's value to userspace */ |
| ctrls->gain->val = (1 << m) * (16 + (rgain & 0xf)); |
| } |
| |
| return ret; |
| } |
| |
| static int ov965x_set_sharpness(struct ov965x *ov965x, unsigned int value) |
| { |
| u8 com14, edge; |
| int ret; |
| |
| ret = ov965x_read(ov965x->client, REG_COM14, &com14); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_read(ov965x->client, REG_EDGE, &edge); |
| if (ret < 0) |
| return ret; |
| com14 = value ? com14 | COM14_EDGE_EN : com14 & ~COM14_EDGE_EN; |
| value--; |
| if (value > 0x0f) { |
| com14 |= COM14_EEF_X2; |
| value >>= 1; |
| } else { |
| com14 &= ~COM14_EEF_X2; |
| } |
| ret = ov965x_write(ov965x->client, REG_COM14, com14); |
| if (ret < 0) |
| return ret; |
| |
| edge &= ~EDGE_FACTOR_MASK; |
| edge |= ((u8)value & 0x0f); |
| |
| return ov965x_write(ov965x->client, REG_EDGE, edge); |
| } |
| |
| static int ov965x_set_exposure(struct ov965x *ov965x, int exp) |
| { |
| struct i2c_client *client = ov965x->client; |
| struct ov965x_ctrls *ctrls = &ov965x->ctrls; |
| bool auto_exposure = (exp == V4L2_EXPOSURE_AUTO); |
| int ret; |
| u8 reg; |
| |
| if (ctrls->auto_exp->is_new) { |
| ret = ov965x_read(client, REG_COM8, ®); |
| if (ret < 0) |
| return ret; |
| if (auto_exposure) |
| reg |= (COM8_AEC | COM8_AGC); |
| else |
| reg &= ~(COM8_AEC | COM8_AGC); |
| ret = ov965x_write(client, REG_COM8, reg); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (!auto_exposure && ctrls->exposure->is_new) { |
| unsigned int exposure = (ctrls->exposure->val * 100) |
| / ov965x->exp_row_interval; |
| /* |
| * Manual exposure value |
| * [b15:b0] - AECHM (b15:b10), AECH (b9:b2), COM1 (b1:b0) |
| */ |
| ret = ov965x_write(client, REG_COM1, exposure & 0x3); |
| if (!ret) |
| ret = ov965x_write(client, REG_AECH, |
| (exposure >> 2) & 0xff); |
| if (!ret) |
| ret = ov965x_write(client, REG_AECHM, |
| (exposure >> 10) & 0x3f); |
| /* Update the value to minimize rounding errors */ |
| ctrls->exposure->val = ((exposure * ov965x->exp_row_interval) |
| + 50) / 100; |
| if (ret < 0) |
| return ret; |
| } |
| |
| v4l2_ctrl_activate(ov965x->ctrls.brightness, !exp); |
| return 0; |
| } |
| |
| static int ov965x_set_flip(struct ov965x *ov965x) |
| { |
| u8 mvfp = 0; |
| |
| if (ov965x->ctrls.hflip->val) |
| mvfp |= MVFP_MIRROR; |
| |
| if (ov965x->ctrls.vflip->val) |
| mvfp |= MVFP_FLIP; |
| |
| return ov965x_write(ov965x->client, REG_MVFP, mvfp); |
| } |
| |
| #define NUM_SAT_LEVELS 5 |
| #define NUM_SAT_REGS 6 |
| |
| static int ov965x_set_saturation(struct ov965x *ov965x, int val) |
| { |
| static const u8 regs[NUM_SAT_LEVELS][NUM_SAT_REGS] = { |
| /* MTX(1)...MTX(6) */ |
| { 0x1d, 0x1f, 0x02, 0x09, 0x13, 0x1c }, /* -2 */ |
| { 0x2e, 0x31, 0x02, 0x0e, 0x1e, 0x2d }, /* -1 */ |
| { 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38 }, /* 0 */ |
| { 0x46, 0x49, 0x04, 0x16, 0x2e, 0x43 }, /* +1 */ |
| { 0x57, 0x5c, 0x05, 0x1b, 0x39, 0x54 }, /* +2 */ |
| }; |
| u8 addr = REG_MTX(1); |
| int i, ret = 0; |
| |
| val += (NUM_SAT_LEVELS / 2); |
| if (val >= NUM_SAT_LEVELS) |
| return -EINVAL; |
| |
| for (i = 0; i < NUM_SAT_REGS && !ret; i++) |
| ret = ov965x_write(ov965x->client, addr + i, regs[val][i]); |
| |
| return ret; |
| } |
| |
| static int ov965x_set_test_pattern(struct ov965x *ov965x, int value) |
| { |
| int ret; |
| u8 reg; |
| |
| ret = ov965x_read(ov965x->client, REG_COM23, ®); |
| if (ret < 0) |
| return ret; |
| reg = value ? reg | COM23_TEST_MODE : reg & ~COM23_TEST_MODE; |
| return ov965x_write(ov965x->client, REG_COM23, reg); |
| } |
| |
| static int __g_volatile_ctrl(struct ov965x *ov965x, struct v4l2_ctrl *ctrl) |
| { |
| struct i2c_client *client = ov965x->client; |
| unsigned int exposure, gain, m; |
| u8 reg0, reg1, reg2; |
| int ret; |
| |
| if (!ov965x->power) |
| return 0; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_AUTOGAIN: |
| if (!ctrl->val) |
| return 0; |
| ret = ov965x_read(client, REG_GAIN, ®0); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_read(client, REG_VREF, ®1); |
| if (ret < 0) |
| return ret; |
| gain = ((reg1 >> 6) << 8) | reg0; |
| m = 0x01 << fls(gain >> 4); |
| ov965x->ctrls.gain->val = m * (16 + (gain & 0xf)); |
| break; |
| |
| case V4L2_CID_EXPOSURE_AUTO: |
| if (ctrl->val == V4L2_EXPOSURE_MANUAL) |
| return 0; |
| ret = ov965x_read(client, REG_COM1, ®0); |
| if (!ret) |
| ret = ov965x_read(client, REG_AECH, ®1); |
| if (!ret) |
| ret = ov965x_read(client, REG_AECHM, ®2); |
| if (ret < 0) |
| return ret; |
| exposure = ((reg2 & 0x3f) << 10) | (reg1 << 2) | |
| (reg0 & 0x3); |
| ov965x->ctrls.exposure->val = ((exposure * |
| ov965x->exp_row_interval) + 50) / 100; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int ov965x_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct v4l2_subdev *sd = ctrl_to_sd(ctrl); |
| struct ov965x *ov965x = to_ov965x(sd); |
| int ret; |
| |
| v4l2_dbg(1, debug, sd, "g_ctrl: %s\n", ctrl->name); |
| |
| mutex_lock(&ov965x->lock); |
| ret = __g_volatile_ctrl(ov965x, ctrl); |
| mutex_unlock(&ov965x->lock); |
| return ret; |
| } |
| |
| static int ov965x_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct v4l2_subdev *sd = ctrl_to_sd(ctrl); |
| struct ov965x *ov965x = to_ov965x(sd); |
| int ret = -EINVAL; |
| |
| v4l2_dbg(1, debug, sd, "s_ctrl: %s, value: %d. power: %d\n", |
| ctrl->name, ctrl->val, ov965x->power); |
| |
| mutex_lock(&ov965x->lock); |
| /* |
| * If the device is not powered up now postpone applying control's |
| * value to the hardware, until it is ready to accept commands. |
| */ |
| if (ov965x->power == 0) { |
| mutex_unlock(&ov965x->lock); |
| return 0; |
| } |
| |
| switch (ctrl->id) { |
| case V4L2_CID_AUTO_WHITE_BALANCE: |
| ret = ov965x_set_white_balance(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_BRIGHTNESS: |
| ret = ov965x_set_brightness(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_EXPOSURE_AUTO: |
| ret = ov965x_set_exposure(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_AUTOGAIN: |
| ret = ov965x_set_gain(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_HFLIP: |
| ret = ov965x_set_flip(ov965x); |
| break; |
| |
| case V4L2_CID_POWER_LINE_FREQUENCY: |
| ret = ov965x_set_banding_filter(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_SATURATION: |
| ret = ov965x_set_saturation(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_SHARPNESS: |
| ret = ov965x_set_sharpness(ov965x, ctrl->val); |
| break; |
| |
| case V4L2_CID_TEST_PATTERN: |
| ret = ov965x_set_test_pattern(ov965x, ctrl->val); |
| break; |
| } |
| |
| mutex_unlock(&ov965x->lock); |
| return ret; |
| } |
| |
| static const struct v4l2_ctrl_ops ov965x_ctrl_ops = { |
| .g_volatile_ctrl = ov965x_g_volatile_ctrl, |
| .s_ctrl = ov965x_s_ctrl, |
| }; |
| |
| static const char * const test_pattern_menu[] = { |
| "Disabled", |
| "Color bars", |
| }; |
| |
| static int ov965x_initialize_controls(struct ov965x *ov965x) |
| { |
| const struct v4l2_ctrl_ops *ops = &ov965x_ctrl_ops; |
| struct ov965x_ctrls *ctrls = &ov965x->ctrls; |
| struct v4l2_ctrl_handler *hdl = &ctrls->handler; |
| int ret; |
| |
| ret = v4l2_ctrl_handler_init(hdl, 16); |
| if (ret < 0) |
| return ret; |
| |
| /* Auto/manual white balance */ |
| ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops, |
| V4L2_CID_AUTO_WHITE_BALANCE, |
| 0, 1, 1, 1); |
| ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE, |
| 0, 0xff, 1, 0x80); |
| ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE, |
| 0, 0xff, 1, 0x80); |
| /* Auto/manual exposure */ |
| ctrls->auto_exp = |
| v4l2_ctrl_new_std_menu(hdl, ops, |
| V4L2_CID_EXPOSURE_AUTO, |
| V4L2_EXPOSURE_MANUAL, 0, |
| V4L2_EXPOSURE_AUTO); |
| /* Exposure time, in 100 us units. min/max is updated dynamically. */ |
| ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, |
| V4L2_CID_EXPOSURE_ABSOLUTE, |
| 2, 1500, 1, 500); |
| /* Auto/manual gain */ |
| ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN, |
| 0, 1, 1, 1); |
| ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, |
| 16, 64 * (16 + 15), 1, 64 * 16); |
| |
| ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION, |
| -2, 2, 1, 0); |
| ctrls->brightness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, |
| -3, 3, 1, 0); |
| ctrls->sharpness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, |
| 0, 32, 1, 6); |
| |
| ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); |
| ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); |
| |
| ctrls->light_freq = |
| v4l2_ctrl_new_std_menu(hdl, ops, |
| V4L2_CID_POWER_LINE_FREQUENCY, |
| V4L2_CID_POWER_LINE_FREQUENCY_60HZ, ~0x7, |
| V4L2_CID_POWER_LINE_FREQUENCY_50HZ); |
| |
| v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN, |
| ARRAY_SIZE(test_pattern_menu) - 1, 0, 0, |
| test_pattern_menu); |
| if (hdl->error) { |
| ret = hdl->error; |
| v4l2_ctrl_handler_free(hdl); |
| return ret; |
| } |
| |
| ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE; |
| ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; |
| |
| v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false); |
| v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true); |
| v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true); |
| v4l2_ctrl_cluster(2, &ctrls->hflip); |
| |
| ov965x->sd.ctrl_handler = hdl; |
| return 0; |
| } |
| |
| /* |
| * V4L2 subdev video and pad level operations |
| */ |
| static void ov965x_get_default_format(struct v4l2_mbus_framefmt *mf) |
| { |
| mf->width = ov965x_framesizes[0].width; |
| mf->height = ov965x_framesizes[0].height; |
| mf->colorspace = ov965x_formats[0].colorspace; |
| mf->code = ov965x_formats[0].code; |
| mf->field = V4L2_FIELD_NONE; |
| } |
| |
| static int ov965x_enum_mbus_code(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_mbus_code_enum *code) |
| { |
| if (code->index >= ARRAY_SIZE(ov965x_formats)) |
| return -EINVAL; |
| |
| code->code = ov965x_formats[code->index].code; |
| return 0; |
| } |
| |
| static int ov965x_enum_frame_sizes(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_frame_size_enum *fse) |
| { |
| int i = ARRAY_SIZE(ov965x_formats); |
| |
| if (fse->index >= ARRAY_SIZE(ov965x_framesizes)) |
| return -EINVAL; |
| |
| while (--i) |
| if (fse->code == ov965x_formats[i].code) |
| break; |
| |
| fse->code = ov965x_formats[i].code; |
| |
| fse->min_width = ov965x_framesizes[fse->index].width; |
| fse->max_width = fse->min_width; |
| fse->max_height = ov965x_framesizes[fse->index].height; |
| fse->min_height = fse->max_height; |
| |
| return 0; |
| } |
| |
| static int ov965x_g_frame_interval(struct v4l2_subdev *sd, |
| struct v4l2_subdev_frame_interval *fi) |
| { |
| struct ov965x *ov965x = to_ov965x(sd); |
| |
| mutex_lock(&ov965x->lock); |
| fi->interval = ov965x->fiv->interval; |
| mutex_unlock(&ov965x->lock); |
| |
| return 0; |
| } |
| |
| static int __ov965x_set_frame_interval(struct ov965x *ov965x, |
| struct v4l2_subdev_frame_interval *fi) |
| { |
| struct v4l2_mbus_framefmt *mbus_fmt = &ov965x->format; |
| const struct ov965x_interval *fiv = &ov965x_intervals[0]; |
| u64 req_int, err, min_err = ~0ULL; |
| unsigned int i; |
| |
| if (fi->interval.denominator == 0) |
| return -EINVAL; |
| |
| req_int = (u64)(fi->interval.numerator * 10000) / |
| fi->interval.denominator; |
| |
| for (i = 0; i < ARRAY_SIZE(ov965x_intervals); i++) { |
| const struct ov965x_interval *iv = &ov965x_intervals[i]; |
| |
| if (mbus_fmt->width != iv->size.width || |
| mbus_fmt->height != iv->size.height) |
| continue; |
| err = abs((u64)(iv->interval.numerator * 10000) / |
| iv->interval.denominator - req_int); |
| if (err < min_err) { |
| fiv = iv; |
| min_err = err; |
| } |
| } |
| ov965x->fiv = fiv; |
| |
| v4l2_dbg(1, debug, &ov965x->sd, "Changed frame interval to %u us\n", |
| fiv->interval.numerator * 1000000 / fiv->interval.denominator); |
| |
| return 0; |
| } |
| |
| static int ov965x_s_frame_interval(struct v4l2_subdev *sd, |
| struct v4l2_subdev_frame_interval *fi) |
| { |
| struct ov965x *ov965x = to_ov965x(sd); |
| int ret; |
| |
| v4l2_dbg(1, debug, sd, "Setting %d/%d frame interval\n", |
| fi->interval.numerator, fi->interval.denominator); |
| |
| mutex_lock(&ov965x->lock); |
| ret = __ov965x_set_frame_interval(ov965x, fi); |
| ov965x->apply_frame_fmt = 1; |
| mutex_unlock(&ov965x->lock); |
| return ret; |
| } |
| |
| static int ov965x_get_fmt(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| struct ov965x *ov965x = to_ov965x(sd); |
| struct v4l2_mbus_framefmt *mf; |
| |
| if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { |
| mf = v4l2_subdev_get_try_format(sd, cfg, 0); |
| fmt->format = *mf; |
| return 0; |
| } |
| |
| mutex_lock(&ov965x->lock); |
| fmt->format = ov965x->format; |
| mutex_unlock(&ov965x->lock); |
| |
| return 0; |
| } |
| |
| static void __ov965x_try_frame_size(struct v4l2_mbus_framefmt *mf, |
| const struct ov965x_framesize **size) |
| { |
| const struct ov965x_framesize *fsize = &ov965x_framesizes[0], |
| *match = NULL; |
| int i = ARRAY_SIZE(ov965x_framesizes); |
| unsigned int min_err = UINT_MAX; |
| |
| while (i--) { |
| int err = abs(fsize->width - mf->width) |
| + abs(fsize->height - mf->height); |
| if (err < min_err) { |
| min_err = err; |
| match = fsize; |
| } |
| fsize++; |
| } |
| if (!match) |
| match = &ov965x_framesizes[0]; |
| mf->width = match->width; |
| mf->height = match->height; |
| if (size) |
| *size = match; |
| } |
| |
| static int ov965x_set_fmt(struct v4l2_subdev *sd, |
| struct v4l2_subdev_pad_config *cfg, |
| struct v4l2_subdev_format *fmt) |
| { |
| unsigned int index = ARRAY_SIZE(ov965x_formats); |
| struct v4l2_mbus_framefmt *mf = &fmt->format; |
| struct ov965x *ov965x = to_ov965x(sd); |
| const struct ov965x_framesize *size = NULL; |
| int ret = 0; |
| |
| __ov965x_try_frame_size(mf, &size); |
| |
| while (--index) |
| if (ov965x_formats[index].code == mf->code) |
| break; |
| |
| mf->colorspace = V4L2_COLORSPACE_JPEG; |
| mf->code = ov965x_formats[index].code; |
| mf->field = V4L2_FIELD_NONE; |
| |
| mutex_lock(&ov965x->lock); |
| |
| if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { |
| if (cfg) { |
| mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); |
| *mf = fmt->format; |
| } |
| } else { |
| if (ov965x->streaming) { |
| ret = -EBUSY; |
| } else { |
| ov965x->frame_size = size; |
| ov965x->format = fmt->format; |
| ov965x->tslb_reg = ov965x_formats[index].tslb_reg; |
| ov965x->apply_frame_fmt = 1; |
| } |
| } |
| |
| if (!ret && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { |
| struct v4l2_subdev_frame_interval fiv = { |
| .interval = { 0, 1 } |
| }; |
| /* Reset to minimum possible frame interval */ |
| __ov965x_set_frame_interval(ov965x, &fiv); |
| } |
| mutex_unlock(&ov965x->lock); |
| |
| if (!ret) |
| ov965x_update_exposure_ctrl(ov965x); |
| |
| return ret; |
| } |
| |
| static int ov965x_set_frame_size(struct ov965x *ov965x) |
| { |
| int i, ret = 0; |
| |
| for (i = 0; ret == 0 && i < NUM_FMT_REGS; i++) |
| ret = ov965x_write(ov965x->client, frame_size_reg_addr[i], |
| ov965x->frame_size->regs[i]); |
| return ret; |
| } |
| |
| static int __ov965x_set_params(struct ov965x *ov965x) |
| { |
| struct i2c_client *client = ov965x->client; |
| struct ov965x_ctrls *ctrls = &ov965x->ctrls; |
| int ret = 0; |
| u8 reg; |
| |
| if (ov965x->apply_frame_fmt) { |
| reg = DEF_CLKRC + ov965x->fiv->clkrc_div; |
| ret = ov965x_write(client, REG_CLKRC, reg); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_set_frame_size(ov965x); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_read(client, REG_TSLB, ®); |
| if (ret < 0) |
| return ret; |
| reg &= ~TSLB_YUYV_MASK; |
| reg |= ov965x->tslb_reg; |
| ret = ov965x_write(client, REG_TSLB, reg); |
| if (ret < 0) |
| return ret; |
| } |
| ret = ov965x_set_default_gamma_curve(ov965x); |
| if (ret < 0) |
| return ret; |
| ret = ov965x_set_color_matrix(ov965x); |
| if (ret < 0) |
| return ret; |
| /* |
| * Select manual banding filter, the filter will |
| * be enabled further if required. |
| */ |
| ret = ov965x_read(client, REG_COM11, ®); |
| if (!ret) |
| reg |= COM11_BANDING; |
| ret = ov965x_write(client, REG_COM11, reg); |
| if (ret < 0) |
| return ret; |
| /* |
| * Banding filter (REG_MBD value) needs to match selected |
| * resolution and frame rate, so it's always updated here. |
| */ |
| return ov965x_set_banding_filter(ov965x, ctrls->light_freq->val); |
| } |
| |
| static int ov965x_s_stream(struct v4l2_subdev *sd, int on) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct ov965x *ov965x = to_ov965x(sd); |
| struct ov965x_ctrls *ctrls = &ov965x->ctrls; |
| int ret = 0; |
| |
| v4l2_dbg(1, debug, client, "%s: on: %d\n", __func__, on); |
| |
| mutex_lock(&ov965x->lock); |
| if (ov965x->streaming == !on) { |
| if (on) |
| ret = __ov965x_set_params(ov965x); |
| |
| if (!ret && ctrls->update) { |
| /* |
| * ov965x_s_ctrl callback takes the mutex |
| * so it needs to be released here. |
| */ |
| mutex_unlock(&ov965x->lock); |
| ret = v4l2_ctrl_handler_setup(&ctrls->handler); |
| |
| mutex_lock(&ov965x->lock); |
| if (!ret) |
| ctrls->update = 0; |
| } |
| if (!ret) |
| ret = ov965x_write(client, REG_COM2, |
| on ? 0x01 : 0x11); |
| } |
| if (!ret) |
| ov965x->streaming += on ? 1 : -1; |
| |
| WARN_ON(ov965x->streaming < 0); |
| mutex_unlock(&ov965x->lock); |
| |
| return ret; |
| } |
| |
| /* |
| * V4L2 subdev internal operations |
| */ |
| static int ov965x_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) |
| { |
| struct v4l2_mbus_framefmt *mf = |
| v4l2_subdev_get_try_format(sd, fh->pad, 0); |
| |
| ov965x_get_default_format(mf); |
| return 0; |
| } |
| |
| static const struct v4l2_subdev_pad_ops ov965x_pad_ops = { |
| .enum_mbus_code = ov965x_enum_mbus_code, |
| .enum_frame_size = ov965x_enum_frame_sizes, |
| .get_fmt = ov965x_get_fmt, |
| .set_fmt = ov965x_set_fmt, |
| }; |
| |
| static const struct v4l2_subdev_video_ops ov965x_video_ops = { |
| .s_stream = ov965x_s_stream, |
| .g_frame_interval = ov965x_g_frame_interval, |
| .s_frame_interval = ov965x_s_frame_interval, |
| |
| }; |
| |
| static const struct v4l2_subdev_internal_ops ov965x_sd_internal_ops = { |
| .open = ov965x_open, |
| }; |
| |
| static const struct v4l2_subdev_core_ops ov965x_core_ops = { |
| .s_power = ov965x_s_power, |
| .log_status = v4l2_ctrl_subdev_log_status, |
| .subscribe_event = v4l2_ctrl_subdev_subscribe_event, |
| .unsubscribe_event = v4l2_event_subdev_unsubscribe, |
| }; |
| |
| static const struct v4l2_subdev_ops ov965x_subdev_ops = { |
| .core = &ov965x_core_ops, |
| .pad = &ov965x_pad_ops, |
| .video = &ov965x_video_ops, |
| }; |
| |
| /* |
| * Reset and power down GPIOs configuration |
| */ |
| static int ov965x_configure_gpios(struct ov965x *ov965x, |
| const struct ov9650_platform_data *pdata) |
| { |
| int ret, i; |
| |
| ov965x->gpios[GPIO_PWDN] = pdata->gpio_pwdn; |
| ov965x->gpios[GPIO_RST] = pdata->gpio_reset; |
| |
| for (i = 0; i < ARRAY_SIZE(ov965x->gpios); i++) { |
| int gpio = ov965x->gpios[i]; |
| |
| if (!gpio_is_valid(gpio)) |
| continue; |
| ret = devm_gpio_request_one(&ov965x->client->dev, gpio, |
| GPIOF_OUT_INIT_HIGH, "OV965X"); |
| if (ret < 0) |
| return ret; |
| v4l2_dbg(1, debug, &ov965x->sd, "set gpio %d to 1\n", gpio); |
| |
| gpio_set_value(gpio, 1); |
| gpio_export(gpio, 0); |
| ov965x->gpios[i] = gpio; |
| } |
| |
| return 0; |
| } |
| |
| static int ov965x_detect_sensor(struct v4l2_subdev *sd) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct ov965x *ov965x = to_ov965x(sd); |
| u8 pid, ver; |
| int ret; |
| |
| mutex_lock(&ov965x->lock); |
| __ov965x_set_power(ov965x, 1); |
| msleep(25); |
| |
| /* Check sensor revision */ |
| ret = ov965x_read(client, REG_PID, &pid); |
| if (!ret) |
| ret = ov965x_read(client, REG_VER, &ver); |
| |
| __ov965x_set_power(ov965x, 0); |
| |
| if (!ret) { |
| ov965x->id = OV965X_ID(pid, ver); |
| if (ov965x->id == OV9650_ID || ov965x->id == OV9652_ID) { |
| v4l2_info(sd, "Found OV%04X sensor\n", ov965x->id); |
| } else { |
| v4l2_err(sd, "Sensor detection failed (%04X, %d)\n", |
| ov965x->id, ret); |
| ret = -ENODEV; |
| } |
| } |
| mutex_unlock(&ov965x->lock); |
| |
| return ret; |
| } |
| |
| static int ov965x_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| const struct ov9650_platform_data *pdata = client->dev.platform_data; |
| struct v4l2_subdev *sd; |
| struct ov965x *ov965x; |
| int ret; |
| |
| if (!pdata) { |
| dev_err(&client->dev, "platform data not specified\n"); |
| return -EINVAL; |
| } |
| |
| if (pdata->mclk_frequency == 0) { |
| dev_err(&client->dev, "MCLK frequency not specified\n"); |
| return -EINVAL; |
| } |
| |
| ov965x = devm_kzalloc(&client->dev, sizeof(*ov965x), GFP_KERNEL); |
| if (!ov965x) |
| return -ENOMEM; |
| |
| mutex_init(&ov965x->lock); |
| ov965x->client = client; |
| ov965x->mclk_frequency = pdata->mclk_frequency; |
| |
| sd = &ov965x->sd; |
| v4l2_i2c_subdev_init(sd, client, &ov965x_subdev_ops); |
| strlcpy(sd->name, DRIVER_NAME, sizeof(sd->name)); |
| |
| sd->internal_ops = &ov965x_sd_internal_ops; |
| sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | |
| V4L2_SUBDEV_FL_HAS_EVENTS; |
| |
| ret = ov965x_configure_gpios(ov965x, pdata); |
| if (ret < 0) |
| goto err_mutex; |
| |
| ov965x->pad.flags = MEDIA_PAD_FL_SOURCE; |
| sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; |
| ret = media_entity_pads_init(&sd->entity, 1, &ov965x->pad); |
| if (ret < 0) |
| goto err_mutex; |
| |
| ret = ov965x_initialize_controls(ov965x); |
| if (ret < 0) |
| goto err_me; |
| |
| ov965x_get_default_format(&ov965x->format); |
| ov965x->frame_size = &ov965x_framesizes[0]; |
| ov965x->fiv = &ov965x_intervals[0]; |
| |
| ret = ov965x_detect_sensor(sd); |
| if (ret < 0) |
| goto err_ctrls; |
| |
| /* Update exposure time min/max to match frame format */ |
| ov965x_update_exposure_ctrl(ov965x); |
| |
| ret = v4l2_async_register_subdev(sd); |
| if (ret < 0) |
| goto err_ctrls; |
| |
| return 0; |
| err_ctrls: |
| v4l2_ctrl_handler_free(sd->ctrl_handler); |
| err_me: |
| media_entity_cleanup(&sd->entity); |
| err_mutex: |
| mutex_destroy(&ov965x->lock); |
| return ret; |
| } |
| |
| static int ov965x_remove(struct i2c_client *client) |
| { |
| struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| struct ov965x *ov965x = to_ov965x(sd); |
| |
| v4l2_async_unregister_subdev(sd); |
| v4l2_ctrl_handler_free(sd->ctrl_handler); |
| media_entity_cleanup(&sd->entity); |
| mutex_destroy(&ov965x->lock); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id ov965x_id[] = { |
| { "OV9650", 0 }, |
| { "OV9652", 0 }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(i2c, ov965x_id); |
| |
| static struct i2c_driver ov965x_i2c_driver = { |
| .driver = { |
| .name = DRIVER_NAME, |
| }, |
| .probe = ov965x_probe, |
| .remove = ov965x_remove, |
| .id_table = ov965x_id, |
| }; |
| |
| module_i2c_driver(ov965x_i2c_driver); |
| |
| MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>"); |
| MODULE_DESCRIPTION("OV9650/OV9652 CMOS Image Sensor driver"); |
| MODULE_LICENSE("GPL"); |