// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017 Microchip Corporation. #include #include #include #include #include #include #include #include #include #include #include #define REG_OUTSIZE_LSB 0x34 /* OV7740 register tables */ #define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */ #define REG_BGAIN 0x01 /* blue gain */ #define REG_RGAIN 0x02 /* red gain */ #define REG_GGAIN 0x03 /* green gain */ #define REG_REG04 0x04 /* analog setting, don't change*/ #define REG_BAVG 0x05 /* b channel average */ #define REG_GAVG 0x06 /* g channel average */ #define REG_RAVG 0x07 /* r channel average */ #define REG_REG0C 0x0C /* filp enable */ #define REG0C_IMG_FLIP 0x80 #define REG0C_IMG_MIRROR 0x40 #define REG_REG0E 0x0E /* blc line */ #define REG_HAEC 0x0F /* auto exposure cntrl */ #define REG_AEC 0x10 /* auto exposure cntrl */ #define REG_CLK 0x11 /* Clock control */ #define REG_REG55 0x55 /* Clock PLL DIV/PreDiv */ #define REG_REG12 0x12 #define REG_REG13 0x13 /* auto/manual AGC, AEC, Write Balance*/ #define REG13_AEC_EN 0x01 #define REG13_AGC_EN 0x04 #define REG_REG14 0x14 #define REG_CTRL15 0x15 #define REG15_GAIN_MSB 0x03 #define REG_REG16 0x16 #define REG_MIDH 0x1C /* manufacture id byte */ #define REG_MIDL 0x1D /* manufacture id byre */ #define REG_PIDH 0x0A /* Product ID MSB */ #define REG_PIDL 0x0B /* Product ID LSB */ #define REG_84 0x84 /* lots of stuff */ #define REG_REG38 0x38 /* sub-addr */ #define REG_AHSTART 0x17 /* Horiz start high bits */ #define REG_AHSIZE 0x18 #define REG_AVSTART 0x19 /* Vert start high bits */ #define REG_AVSIZE 0x1A #define REG_PSHFT 0x1b /* Pixel delay after HREF */ #define REG_HOUTSIZE 0x31 #define REG_VOUTSIZE 0x32 #define REG_HVSIZEOFF 0x33 #define REG_REG34 0x34 /* DSP output size H/V LSB*/ #define REG_ISP_CTRL00 0x80 #define ISPCTRL00_AWB_EN 0x10 #define ISPCTRL00_AWB_GAIN_EN 0x04 #define REG_YGAIN 0xE2 /* ygain for contrast control */ #define REG_YBRIGHT 0xE3 #define REG_SGNSET 0xE4 #define SGNSET_YBRIGHT_MASK 0x08 #define REG_USAT 0xDD #define REG_VSAT 0xDE struct ov7740 { struct v4l2_subdev subdev; struct media_pad pad; struct v4l2_mbus_framefmt format; const struct ov7740_pixfmt *fmt; /* Current format */ const struct ov7740_framesize *frmsize; struct regmap *regmap; struct clk *xvclk; struct v4l2_ctrl_handler ctrl_handler; struct { /* gain cluster */ struct v4l2_ctrl *auto_gain; struct v4l2_ctrl *gain; }; 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 { /* exposure cluster */ struct v4l2_ctrl *auto_exposure; struct v4l2_ctrl *exposure; }; struct { /* saturation/hue cluster */ struct v4l2_ctrl *saturation; struct v4l2_ctrl *hue; }; struct v4l2_ctrl *brightness; struct v4l2_ctrl *contrast; struct mutex mutex; /* To serialize asynchronous callbacks */ struct gpio_desc *resetb_gpio; struct gpio_desc *pwdn_gpio; }; struct ov7740_pixfmt { u32 mbus_code; enum v4l2_colorspace colorspace; const struct reg_sequence *regs; u32 reg_num; }; struct ov7740_framesize { u16 width; u16 height; const struct reg_sequence *regs; u32 reg_num; }; static const struct reg_sequence ov7740_vga[] = { {0x55, 0x40}, {0x11, 0x02}, {0xd5, 0x10}, {0x0c, 0x12}, {0x0d, 0x34}, {0x17, 0x25}, {0x18, 0xa0}, {0x19, 0x03}, {0x1a, 0xf0}, {0x1b, 0x89}, {0x22, 0x03}, {0x29, 0x18}, {0x2b, 0xf8}, {0x2c, 0x01}, {REG_HOUTSIZE, 0xa0}, {REG_VOUTSIZE, 0xf0}, {0x33, 0xc4}, {REG_OUTSIZE_LSB, 0x0}, {0x35, 0x05}, {0x04, 0x60}, {0x27, 0x80}, {0x3d, 0x0f}, {0x3e, 0x80}, {0x3f, 0x40}, {0x40, 0x7f}, {0x41, 0x6a}, {0x42, 0x29}, {0x44, 0x22}, {0x45, 0x41}, {0x47, 0x02}, {0x49, 0x64}, {0x4a, 0xa1}, {0x4b, 0x40}, {0x4c, 0x1a}, {0x4d, 0x50}, {0x4e, 0x13}, {0x64, 0x00}, {0x67, 0x88}, {0x68, 0x1a}, {0x14, 0x28}, {0x24, 0x3c}, {0x25, 0x30}, {0x26, 0x72}, {0x50, 0x97}, {0x51, 0x1f}, {0x52, 0x00}, {0x53, 0x00}, {0x20, 0x00}, {0x21, 0xcf}, {0x50, 0x4b}, {0x38, 0x14}, {0xe9, 0x00}, {0x56, 0x55}, {0x57, 0xff}, {0x58, 0xff}, {0x59, 0xff}, {0x5f, 0x04}, {0xec, 0x00}, {0x13, 0xff}, {0x81, 0x3f}, {0x82, 0x32}, {0x38, 0x11}, {0x84, 0x70}, {0x85, 0x00}, {0x86, 0x03}, {0x87, 0x01}, {0x88, 0x05}, {0x89, 0x30}, {0x8d, 0x30}, {0x8f, 0x85}, {0x93, 0x30}, {0x95, 0x85}, {0x99, 0x30}, {0x9b, 0x85}, {0x9c, 0x08}, {0x9d, 0x12}, {0x9e, 0x23}, {0x9f, 0x45}, {0xa0, 0x55}, {0xa1, 0x64}, {0xa2, 0x72}, {0xa3, 0x7f}, {0xa4, 0x8b}, {0xa5, 0x95}, {0xa6, 0xa7}, {0xa7, 0xb5}, {0xa8, 0xcb}, {0xa9, 0xdd}, {0xaa, 0xec}, {0xab, 0x1a}, {0xce, 0x78}, {0xcf, 0x6e}, {0xd0, 0x0a}, {0xd1, 0x0c}, {0xd2, 0x84}, {0xd3, 0x90}, {0xd4, 0x1e}, {0x5a, 0x24}, {0x5b, 0x1f}, {0x5c, 0x88}, {0x5d, 0x60}, {0xac, 0x6e}, {0xbe, 0xff}, {0xbf, 0x00}, {0x0f, 0x1d}, {0x0f, 0x1f}, }; static const struct ov7740_framesize ov7740_framesizes[] = { { .width = VGA_WIDTH, .height = VGA_HEIGHT, .regs = ov7740_vga, .reg_num = ARRAY_SIZE(ov7740_vga), }, }; #ifdef CONFIG_VIDEO_ADV_DEBUG static int ov7740_get_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); struct regmap *regmap = ov7740->regmap; unsigned int val = 0; int ret; ret = regmap_read(regmap, reg->reg & 0xff, &val); reg->val = val; reg->size = 1; return ret; } static int ov7740_set_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); struct regmap *regmap = ov7740->regmap; regmap_write(regmap, reg->reg & 0xff, reg->val & 0xff); return 0; } #endif static int ov7740_set_power(struct ov7740 *ov7740, int on) { int ret; if (on) { ret = clk_prepare_enable(ov7740->xvclk); if (ret) return ret; if (ov7740->pwdn_gpio) gpiod_direction_output(ov7740->pwdn_gpio, 0); if (ov7740->resetb_gpio) { gpiod_set_value(ov7740->resetb_gpio, 1); usleep_range(500, 1000); gpiod_set_value(ov7740->resetb_gpio, 0); usleep_range(3000, 5000); } } else { clk_disable_unprepare(ov7740->xvclk); if (ov7740->pwdn_gpio) gpiod_direction_output(ov7740->pwdn_gpio, 0); } return 0; } static const struct v4l2_subdev_core_ops ov7740_subdev_core_ops = { .log_status = v4l2_ctrl_subdev_log_status, #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = ov7740_get_register, .s_register = ov7740_set_register, #endif .subscribe_event = v4l2_ctrl_subdev_subscribe_event, .unsubscribe_event = v4l2_event_subdev_unsubscribe, }; static int ov7740_set_white_balance(struct ov7740 *ov7740, int awb) { struct regmap *regmap = ov7740->regmap; unsigned int value; int ret; ret = regmap_read(regmap, REG_ISP_CTRL00, &value); if (!ret) { if (awb) value |= (ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN); else value &= ~(ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN); ret = regmap_write(regmap, REG_ISP_CTRL00, value); if (ret) return ret; } if (!awb) { ret = regmap_write(regmap, REG_BGAIN, ov7740->blue_balance->val); if (ret) return ret; ret = regmap_write(regmap, REG_RGAIN, ov7740->red_balance->val); if (ret) return ret; } return 0; } static int ov7740_set_saturation(struct regmap *regmap, int value) { int ret; ret = regmap_write(regmap, REG_USAT, (unsigned char)value); if (ret) return ret; return regmap_write(regmap, REG_VSAT, (unsigned char)value); } static int ov7740_set_gain(struct regmap *regmap, int value) { int ret; ret = regmap_write(regmap, REG_GAIN, value & 0xff); if (ret) return ret; ret = regmap_update_bits(regmap, REG_CTRL15, REG15_GAIN_MSB, (value >> 8) & 0x3); if (!ret) ret = regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0); return ret; } static int ov7740_set_autogain(struct regmap *regmap, int value) { unsigned int reg; int ret; ret = regmap_read(regmap, REG_REG13, ®); if (ret) return ret; if (value) reg |= REG13_AGC_EN; else reg &= ~REG13_AGC_EN; return regmap_write(regmap, REG_REG13, reg); } static int ov7740_set_brightness(struct regmap *regmap, int value) { /* Turn off AEC/AGC */ regmap_update_bits(regmap, REG_REG13, REG13_AEC_EN, 0); regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0); if (value >= 0) { regmap_write(regmap, REG_YBRIGHT, (unsigned char)value); regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 0); } else{ regmap_write(regmap, REG_YBRIGHT, (unsigned char)(-value)); regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 1); } return 0; } static int ov7740_set_contrast(struct regmap *regmap, int value) { return regmap_write(regmap, REG_YGAIN, (unsigned char)value); } static int ov7740_get_gain(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl) { struct regmap *regmap = ov7740->regmap; unsigned int value0, value1; int ret; if (!ctrl->val) return 0; ret = regmap_read(regmap, REG_GAIN, &value0); if (ret) return ret; ret = regmap_read(regmap, REG_CTRL15, &value1); if (ret) return ret; ov7740->gain->val = (value1 << 8) | (value0 & 0xff); return 0; } static int ov7740_get_exp(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl) { struct regmap *regmap = ov7740->regmap; unsigned int value0, value1; int ret; if (ctrl->val == V4L2_EXPOSURE_MANUAL) return 0; ret = regmap_read(regmap, REG_AEC, &value0); if (ret) return ret; ret = regmap_read(regmap, REG_HAEC, &value1); if (ret) return ret; ov7740->exposure->val = (value1 << 8) | (value0 & 0xff); return 0; } static int ov7740_set_exp(struct regmap *regmap, int value) { int ret; /* Turn off AEC/AGC */ ret = regmap_update_bits(regmap, REG_REG13, REG13_AEC_EN | REG13_AGC_EN, 0); if (ret) return ret; ret = regmap_write(regmap, REG_AEC, (unsigned char)value); if (ret) return ret; return regmap_write(regmap, REG_HAEC, (unsigned char)(value >> 8)); } static int ov7740_set_autoexp(struct regmap *regmap, enum v4l2_exposure_auto_type value) { unsigned int reg; int ret; ret = regmap_read(regmap, REG_REG13, ®); if (!ret) { if (value == V4L2_EXPOSURE_AUTO) reg |= (REG13_AEC_EN | REG13_AGC_EN); else reg &= ~(REG13_AEC_EN | REG13_AGC_EN); ret = regmap_write(regmap, REG_REG13, reg); } return ret; } static int ov7740_get_volatile_ctrl(struct v4l2_ctrl *ctrl) { struct ov7740 *ov7740 = container_of(ctrl->handler, struct ov7740, ctrl_handler); int ret; switch (ctrl->id) { case V4L2_CID_AUTOGAIN: ret = ov7740_get_gain(ov7740, ctrl); break; case V4L2_CID_EXPOSURE_AUTO: ret = ov7740_get_exp(ov7740, ctrl); break; default: ret = -EINVAL; break; } return ret; } static int ov7740_set_ctrl(struct v4l2_ctrl *ctrl) { struct ov7740 *ov7740 = container_of(ctrl->handler, struct ov7740, ctrl_handler); struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev); struct regmap *regmap = ov7740->regmap; int ret; u8 val; if (!pm_runtime_get_if_in_use(&client->dev)) return 0; switch (ctrl->id) { case V4L2_CID_AUTO_WHITE_BALANCE: ret = ov7740_set_white_balance(ov7740, ctrl->val); break; case V4L2_CID_SATURATION: ret = ov7740_set_saturation(regmap, ctrl->val); break; case V4L2_CID_BRIGHTNESS: ret = ov7740_set_brightness(regmap, ctrl->val); break; case V4L2_CID_CONTRAST: ret = ov7740_set_contrast(regmap, ctrl->val); break; case V4L2_CID_VFLIP: val = ctrl->val ? REG0C_IMG_FLIP : 0x00; ret = regmap_update_bits(regmap, REG_REG0C, REG0C_IMG_FLIP, val); break; case V4L2_CID_HFLIP: val = ctrl->val ? REG0C_IMG_MIRROR : 0x00; ret = regmap_update_bits(regmap, REG_REG0C, REG0C_IMG_MIRROR, val); break; case V4L2_CID_AUTOGAIN: if (!ctrl->val) ret = ov7740_set_gain(regmap, ov7740->gain->val); else ret = ov7740_set_autogain(regmap, ctrl->val); break; case V4L2_CID_EXPOSURE_AUTO: if (ctrl->val == V4L2_EXPOSURE_MANUAL) ret = ov7740_set_exp(regmap, ov7740->exposure->val); else ret = ov7740_set_autoexp(regmap, ctrl->val); break; default: ret = -EINVAL; break; } pm_runtime_put(&client->dev); return ret; } static const struct v4l2_ctrl_ops ov7740_ctrl_ops = { .g_volatile_ctrl = ov7740_get_volatile_ctrl, .s_ctrl = ov7740_set_ctrl, }; static int ov7740_start_streaming(struct ov7740 *ov7740) { int ret; if (ov7740->fmt) { ret = regmap_multi_reg_write(ov7740->regmap, ov7740->fmt->regs, ov7740->fmt->reg_num); if (ret) return ret; } if (ov7740->frmsize) { ret = regmap_multi_reg_write(ov7740->regmap, ov7740->frmsize->regs, ov7740->frmsize->reg_num); if (ret) return ret; } return __v4l2_ctrl_handler_setup(ov7740->subdev.ctrl_handler); } static int ov7740_set_stream(struct v4l2_subdev *sd, int enable) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; mutex_lock(&ov7740->mutex); if (enable) { ret = pm_runtime_resume_and_get(&client->dev); if (ret < 0) goto err_unlock; ret = ov7740_start_streaming(ov7740); if (ret) goto err_rpm_put; } else { pm_runtime_put(&client->dev); } mutex_unlock(&ov7740->mutex); return ret; err_rpm_put: pm_runtime_put(&client->dev); err_unlock: mutex_unlock(&ov7740->mutex); return ret; } static const struct v4l2_subdev_video_ops ov7740_subdev_video_ops = { .s_stream = ov7740_set_stream, }; static const struct reg_sequence ov7740_format_yuyv[] = { {0x12, 0x00}, {0x36, 0x3f}, {0x80, 0x7f}, {0x83, 0x01}, }; static const struct reg_sequence ov7740_format_bggr8[] = { {0x36, 0x2f}, {0x80, 0x01}, {0x83, 0x04}, }; static const struct ov7740_pixfmt ov7740_formats[] = { { .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, .colorspace = V4L2_COLORSPACE_SRGB, .regs = ov7740_format_yuyv, .reg_num = ARRAY_SIZE(ov7740_format_yuyv), }, { .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, .colorspace = V4L2_COLORSPACE_SRGB, .regs = ov7740_format_bggr8, .reg_num = ARRAY_SIZE(ov7740_format_bggr8), } }; #define N_OV7740_FMTS ARRAY_SIZE(ov7740_formats) static int ov7740_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { if (code->pad || code->index >= N_OV7740_FMTS) return -EINVAL; code->code = ov7740_formats[code->index].mbus_code; return 0; } static int ov7740_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_interval_enum *fie) { if (fie->pad) return -EINVAL; if (fie->index >= 1) return -EINVAL; if ((fie->width != VGA_WIDTH) || (fie->height != VGA_HEIGHT)) return -EINVAL; fie->interval.numerator = 1; fie->interval.denominator = 60; return 0; } static int ov7740_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fse) { if (fse->pad) return -EINVAL; if (fse->index > 0) return -EINVAL; fse->min_width = fse->max_width = VGA_WIDTH; fse->min_height = fse->max_height = VGA_HEIGHT; return 0; } static int ov7740_try_fmt_internal(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt, const struct ov7740_pixfmt **ret_fmt, const struct ov7740_framesize **ret_frmsize) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); const struct ov7740_framesize *fsize = &ov7740_framesizes[0]; int index, i; for (index = 0; index < N_OV7740_FMTS; index++) { if (ov7740_formats[index].mbus_code == fmt->code) break; } if (index >= N_OV7740_FMTS) { /* default to first format */ index = 0; fmt->code = ov7740_formats[0].mbus_code; } if (ret_fmt != NULL) *ret_fmt = ov7740_formats + index; for (i = 0; i < ARRAY_SIZE(ov7740_framesizes); i++) { if ((fsize->width >= fmt->width) && (fsize->height >= fmt->height)) { fmt->width = fsize->width; fmt->height = fsize->height; break; } fsize++; } if (i >= ARRAY_SIZE(ov7740_framesizes)) { fsize = &ov7740_framesizes[0]; fmt->width = fsize->width; fmt->height = fsize->height; } if (ret_frmsize != NULL) *ret_frmsize = fsize; fmt->field = V4L2_FIELD_NONE; fmt->colorspace = ov7740_formats[index].colorspace; ov7740->format = *fmt; return 0; } static int ov7740_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); const struct ov7740_pixfmt *ovfmt; const struct ov7740_framesize *fsize; struct v4l2_mbus_framefmt *mbus_fmt; int ret; mutex_lock(&ov7740->mutex); if (format->pad) { ret = -EINVAL; goto error; } if (format->which == V4L2_SUBDEV_FORMAT_TRY) { ret = ov7740_try_fmt_internal(sd, &format->format, NULL, NULL); if (ret) goto error; mbus_fmt = v4l2_subdev_state_get_format(sd_state, format->pad); *mbus_fmt = format->format; mutex_unlock(&ov7740->mutex); return 0; } ret = ov7740_try_fmt_internal(sd, &format->format, &ovfmt, &fsize); if (ret) goto error; ov7740->fmt = ovfmt; ov7740->frmsize = fsize; mutex_unlock(&ov7740->mutex); return 0; error: mutex_unlock(&ov7740->mutex); return ret; } static int ov7740_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); struct v4l2_mbus_framefmt *mbus_fmt; mutex_lock(&ov7740->mutex); if (format->which == V4L2_SUBDEV_FORMAT_TRY) { mbus_fmt = v4l2_subdev_state_get_format(sd_state, 0); format->format = *mbus_fmt; } else { format->format = ov7740->format; } mutex_unlock(&ov7740->mutex); return 0; } static int ov7740_get_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_interval *ival) { struct v4l2_fract *tpf = &ival->interval; tpf->numerator = 1; tpf->denominator = 60; return 0; } static const struct v4l2_subdev_pad_ops ov7740_subdev_pad_ops = { .enum_frame_interval = ov7740_enum_frame_interval, .enum_frame_size = ov7740_enum_frame_size, .enum_mbus_code = ov7740_enum_mbus_code, .get_fmt = ov7740_get_fmt, .set_fmt = ov7740_set_fmt, .get_frame_interval = ov7740_get_frame_interval, .set_frame_interval = ov7740_get_frame_interval, }; static const struct v4l2_subdev_ops ov7740_subdev_ops = { .core = &ov7740_subdev_core_ops, .video = &ov7740_subdev_video_ops, .pad = &ov7740_subdev_pad_ops, }; static void ov7740_get_default_format(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *format) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); format->width = ov7740->frmsize->width; format->height = ov7740->frmsize->height; format->colorspace = ov7740->fmt->colorspace; format->code = ov7740->fmt->mbus_code; format->field = V4L2_FIELD_NONE; } static int ov7740_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); struct v4l2_mbus_framefmt *format = v4l2_subdev_state_get_format(fh->state, 0); mutex_lock(&ov7740->mutex); ov7740_get_default_format(sd, format); mutex_unlock(&ov7740->mutex); return 0; } static const struct v4l2_subdev_internal_ops ov7740_subdev_internal_ops = { .open = ov7740_open, }; static int ov7740_probe_dt(struct i2c_client *client, struct ov7740 *ov7740) { ov7740->resetb_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(ov7740->resetb_gpio)) { dev_info(&client->dev, "can't get %s GPIO\n", "reset"); return PTR_ERR(ov7740->resetb_gpio); } ov7740->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown", GPIOD_OUT_LOW); if (IS_ERR(ov7740->pwdn_gpio)) { dev_info(&client->dev, "can't get %s GPIO\n", "powerdown"); return PTR_ERR(ov7740->pwdn_gpio); } return 0; } static int ov7740_detect(struct ov7740 *ov7740) { struct regmap *regmap = ov7740->regmap; unsigned int midh, midl, pidh, pidl; int ret; ret = regmap_read(regmap, REG_MIDH, &midh); if (ret) return ret; if (midh != 0x7f) return -ENODEV; ret = regmap_read(regmap, REG_MIDL, &midl); if (ret) return ret; if (midl != 0xa2) return -ENODEV; ret = regmap_read(regmap, REG_PIDH, &pidh); if (ret) return ret; if (pidh != 0x77) return -ENODEV; ret = regmap_read(regmap, REG_PIDL, &pidl); if (ret) return ret; if ((pidl != 0x40) && (pidl != 0x41) && (pidl != 0x42)) return -ENODEV; return 0; } static int ov7740_init_controls(struct ov7740 *ov7740) { struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev); struct v4l2_ctrl_handler *ctrl_hdlr = &ov7740->ctrl_handler; int ret; ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12); if (ret < 0) return ret; ctrl_hdlr->lock = &ov7740->mutex; ov7740->auto_wb = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); ov7740->blue_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, 0x80); ov7740->red_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_RED_BALANCE, 0, 0xff, 1, 0x80); ov7740->brightness = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_BRIGHTNESS, -255, 255, 1, 0); ov7740->contrast = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_CONTRAST, 0, 127, 1, 0x20); ov7740->saturation = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_SATURATION, 0, 256, 1, 0x80); ov7740->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); ov7740->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); ov7740->gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_GAIN, 0, 1023, 1, 500); ov7740->auto_gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_AUTOGAIN, 0, 1, 1, 1); ov7740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_EXPOSURE, 0, 65535, 1, 500); ov7740->auto_exposure = v4l2_ctrl_new_std_menu(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO); v4l2_ctrl_auto_cluster(3, &ov7740->auto_wb, 0, false); v4l2_ctrl_auto_cluster(2, &ov7740->auto_gain, 0, true); v4l2_ctrl_auto_cluster(2, &ov7740->auto_exposure, V4L2_EXPOSURE_MANUAL, true); if (ctrl_hdlr->error) { ret = ctrl_hdlr->error; dev_err(&client->dev, "controls initialisation failed (%d)\n", ret); goto error; } ret = v4l2_ctrl_handler_setup(ctrl_hdlr); if (ret) { dev_err(&client->dev, "%s control init failed (%d)\n", __func__, ret); goto error; } ov7740->subdev.ctrl_handler = ctrl_hdlr; return 0; error: v4l2_ctrl_handler_free(ctrl_hdlr); mutex_destroy(&ov7740->mutex); return ret; } static void ov7740_free_controls(struct ov7740 *ov7740) { v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler); mutex_destroy(&ov7740->mutex); } #define OV7740_MAX_REGISTER 0xff static const struct regmap_config ov7740_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = OV7740_MAX_REGISTER, }; static int ov7740_probe(struct i2c_client *client) { struct ov7740 *ov7740; struct v4l2_subdev *sd; int ret; ov7740 = devm_kzalloc(&client->dev, sizeof(*ov7740), GFP_KERNEL); if (!ov7740) return -ENOMEM; ov7740->xvclk = devm_clk_get(&client->dev, "xvclk"); if (IS_ERR(ov7740->xvclk)) { ret = PTR_ERR(ov7740->xvclk); dev_err(&client->dev, "OV7740: fail to get xvclk: %d\n", ret); return ret; } ret = ov7740_probe_dt(client, ov7740); if (ret) return ret; ov7740->regmap = devm_regmap_init_sccb(client, &ov7740_regmap_config); if (IS_ERR(ov7740->regmap)) { ret = PTR_ERR(ov7740->regmap); dev_err(&client->dev, "Failed to allocate register map: %d\n", ret); return ret; } sd = &ov7740->subdev; v4l2_i2c_subdev_init(sd, client, &ov7740_subdev_ops); sd->internal_ops = &ov7740_subdev_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; ov7740->pad.flags = MEDIA_PAD_FL_SOURCE; sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = media_entity_pads_init(&sd->entity, 1, &ov7740->pad); if (ret) return ret; ret = ov7740_set_power(ov7740, 1); if (ret) return ret; pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); ret = ov7740_detect(ov7740); if (ret) goto error_detect; mutex_init(&ov7740->mutex); ret = ov7740_init_controls(ov7740); if (ret) goto error_init_controls; v4l_info(client, "chip found @ 0x%02x (%s)\n", client->addr << 1, client->adapter->name); ov7740->fmt = &ov7740_formats[0]; ov7740->frmsize = &ov7740_framesizes[0]; ov7740_get_default_format(sd, &ov7740->format); ret = v4l2_async_register_subdev(sd); if (ret) goto error_async_register; pm_runtime_idle(&client->dev); return 0; error_async_register: v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler); error_init_controls: ov7740_free_controls(ov7740); error_detect: pm_runtime_disable(&client->dev); pm_runtime_set_suspended(&client->dev); ov7740_set_power(ov7740, 0); media_entity_cleanup(&ov7740->subdev.entity); return ret; } static void ov7740_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); mutex_destroy(&ov7740->mutex); v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler); media_entity_cleanup(&ov7740->subdev.entity); v4l2_async_unregister_subdev(sd); ov7740_free_controls(ov7740); pm_runtime_get_sync(&client->dev); pm_runtime_disable(&client->dev); pm_runtime_set_suspended(&client->dev); pm_runtime_put_noidle(&client->dev); ov7740_set_power(ov7740, 0); } static int __maybe_unused ov7740_runtime_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); ov7740_set_power(ov7740, 0); return 0; } static int __maybe_unused ov7740_runtime_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); return ov7740_set_power(ov7740, 1); } static const struct i2c_device_id ov7740_id[] = { { "ov7740" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(i2c, ov7740_id); static const struct dev_pm_ops ov7740_pm_ops = { SET_RUNTIME_PM_OPS(ov7740_runtime_suspend, ov7740_runtime_resume, NULL) }; static const struct of_device_id ov7740_of_match[] = { {.compatible = "ovti,ov7740", }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, ov7740_of_match); static struct i2c_driver ov7740_i2c_driver = { .driver = { .name = "ov7740", .pm = &ov7740_pm_ops, .of_match_table = ov7740_of_match, }, .probe = ov7740_probe, .remove = ov7740_remove, .id_table = ov7740_id, }; module_i2c_driver(ov7740_i2c_driver); MODULE_DESCRIPTION("The V4L2 driver for Omnivision 7740 sensor"); MODULE_AUTHOR("Songjun Wu "); MODULE_LICENSE("GPL v2");