diff options
Diffstat (limited to 'drivers/media/i2c/ov7740.c')
| -rw-r--r-- | drivers/media/i2c/ov7740.c | 1220 |
1 files changed, 1220 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov7740.c b/drivers/media/i2c/ov7740.c new file mode 100644 index 000000000..780401393 --- /dev/null +++ b/drivers/media/i2c/ov7740.c @@ -0,0 +1,1220 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2017 Microchip Corporation. + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/v4l2-image-sizes.h> +#include <media/v4l2-subdev.h> + +#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, dont 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; +#if defined(CONFIG_MEDIA_CONTROLLER) + struct media_pad pad; +#endif + 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 asynchronus callbacks */ + bool streaming; /* Streaming on/off */ + + 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 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_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; + 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 = 0; + + 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: + 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) + return ov7740_set_gain(regmap, ov7740->gain->val); + + ret = ov7740_set_autogain(regmap, ctrl->val); + break; + + case V4L2_CID_EXPOSURE_AUTO: + if (ctrl->val == V4L2_EXPOSURE_MANUAL) + return ov7740_set_exp(regmap, ov7740->exposure->val); + + 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 (ov7740->streaming == enable) { + mutex_unlock(&ov7740->mutex); + return 0; + } + + if (enable) { + ret = pm_runtime_get_sync(&client->dev); + if (ret < 0) { + pm_runtime_put_noidle(&client->dev); + goto err_unlock; + } + + ret = ov7740_start_streaming(ov7740); + if (ret) + goto err_rpm_put; + } else { + pm_runtime_put(&client->dev); + } + + ov7740->streaming = enable; + + mutex_unlock(&ov7740->mutex); + return ret; + +err_rpm_put: + pm_runtime_put(&client->dev); +err_unlock: + mutex_unlock(&ov7740->mutex); + return ret; +} + +static int ov7740_g_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *ival) +{ + struct v4l2_fract *tpf = &ival->interval; + + + tpf->numerator = 1; + tpf->denominator = 60; + + return 0; +} + +static int ov7740_s_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *ival) +{ + struct v4l2_fract *tpf = &ival->interval; + + + tpf->numerator = 1; + tpf->denominator = 60; + + return 0; +} + +static struct v4l2_subdev_video_ops ov7740_subdev_video_ops = { + .s_stream = ov7740_set_stream, + .s_frame_interval = ov7740_s_frame_interval, + .g_frame_interval = ov7740_g_frame_interval, +}; + +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_pad_config *cfg, + 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_pad_config *cfg, + 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_pad_config *cfg, + 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_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); + const struct ov7740_pixfmt *ovfmt; + const struct ov7740_framesize *fsize; +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + struct v4l2_mbus_framefmt *mbus_fmt; +#endif + 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; +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad); + *mbus_fmt = format->format; + + mutex_unlock(&ov7740->mutex); + return 0; +#else + ret = -ENOTTY; + goto error; +#endif + } + + 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_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + struct v4l2_mbus_framefmt *mbus_fmt; +#endif + int ret = 0; + + mutex_lock(&ov7740->mutex); + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, 0); + format->format = *mbus_fmt; + ret = 0; +#else + ret = -ENOTTY; +#endif + } else { + format->format = ov7740->format; + } + mutex_unlock(&ov7740->mutex); + + return ret; +} + +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, +}; + +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; +} + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API +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_get_try_format(sd, fh->pad, 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, +}; +#endif + +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); + if (ov7740->gain) + ov7740->gain->flags |= V4L2_CTRL_FLAG_VOLATILE; + + 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); + if (ov7740->exposure) + ov7740->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; + + 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, false); + v4l2_ctrl_cluster(2, &ov7740->hflip); + + 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, + const struct i2c_device_id *id) +{ + struct ov7740 *ov7740; + struct v4l2_subdev *sd; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, + "OV7740: I2C-Adapter doesn't support SMBUS\n"); + return -EIO; + } + + 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_i2c(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; + client->flags |= I2C_CLIENT_SCCB; + v4l2_i2c_subdev_init(sd, client, &ov7740_subdev_ops); + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + sd->internal_ops = &ov7740_subdev_internal_ops; + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; +#endif + +#if defined(CONFIG_MEDIA_CONTROLLER) + 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; +#endif + + 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 int 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); + return 0; +} + +static int __maybe_unused ov7740_runtime_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + 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 i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev); + + return ov7740_set_power(ov7740, 1); +} + +static const struct i2c_device_id ov7740_id[] = { + { "ov7740", 0 }, + { /* 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 = of_match_ptr(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 <songjun.wu@atmel.com>"); +MODULE_LICENSE("GPL v2"); |