// SPDX-License-Identifier: GPL-2.0-only /* * V4L2 subdevice driver for OmniVision OV6650 Camera Sensor * * Copyright (C) 2010 Janusz Krzysztofik * * Based on OmniVision OV96xx Camera Driver * Copyright (C) 2009 Marek Vasut * * Based on ov772x camera driver: * Copyright (C) 2008 Renesas Solutions Corp. * Kuninori Morimoto * * Based on ov7670 and soc_camera_platform driver, * Copyright 2006-7 Jonathan Corbet * Copyright (C) 2008 Magnus Damm * Copyright (C) 2008, Guennadi Liakhovetski * * Hardware specific bits initially based on former work by Matt Callow * drivers/media/video/omap/sensor_ov6650.c * Copyright (C) 2006 Matt Callow */ #include #include #include #include #include #include #include #include #include /* Register definitions */ #define REG_GAIN 0x00 /* range 00 - 3F */ #define REG_BLUE 0x01 #define REG_RED 0x02 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */ #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */ #define REG_BRT 0x06 #define REG_PIDH 0x0a #define REG_PIDL 0x0b #define REG_AECH 0x10 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */ /* [7:6] Input system clock (MHz)*/ /* 00=8, 01=12, 10=16, 11=24 */ /* [5:0]: Internal Clock Pre-Scaler */ #define REG_COMA 0x12 /* [7] Reset */ #define REG_COMB 0x13 #define REG_COMC 0x14 #define REG_COMD 0x15 #define REG_COML 0x16 #define REG_HSTRT 0x17 #define REG_HSTOP 0x18 #define REG_VSTRT 0x19 #define REG_VSTOP 0x1a #define REG_PSHFT 0x1b #define REG_MIDH 0x1c #define REG_MIDL 0x1d #define REG_HSYNS 0x1e #define REG_HSYNE 0x1f #define REG_COME 0x20 #define REG_YOFF 0x21 #define REG_UOFF 0x22 #define REG_VOFF 0x23 #define REG_AEW 0x24 #define REG_AEB 0x25 #define REG_COMF 0x26 #define REG_COMG 0x27 #define REG_COMH 0x28 #define REG_COMI 0x29 #define REG_FRARL 0x2b #define REG_COMJ 0x2c #define REG_COMK 0x2d #define REG_AVGY 0x2e #define REG_REF0 0x2f #define REG_REF1 0x30 #define REG_REF2 0x31 #define REG_FRAJH 0x32 #define REG_FRAJL 0x33 #define REG_FACT 0x34 #define REG_L1AEC 0x35 #define REG_AVGU 0x36 #define REG_AVGV 0x37 #define REG_SPCB 0x60 #define REG_SPCC 0x61 #define REG_GAM1 0x62 #define REG_GAM2 0x63 #define REG_GAM3 0x64 #define REG_SPCD 0x65 #define REG_SPCE 0x68 #define REG_ADCL 0x69 #define REG_RMCO 0x6c #define REG_GMCO 0x6d #define REG_BMCO 0x6e /* Register bits, values, etc. */ #define OV6650_PIDH 0x66 /* high byte of product ID number */ #define OV6650_PIDL 0x50 /* low byte of product ID number */ #define OV6650_MIDH 0x7F /* high byte of mfg ID */ #define OV6650_MIDL 0xA2 /* low byte of mfg ID */ #define DEF_GAIN 0x00 #define DEF_BLUE 0x80 #define DEF_RED 0x80 #define SAT_SHIFT 4 #define SAT_MASK (0xf << SAT_SHIFT) #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK) #define HUE_EN BIT(5) #define HUE_MASK 0x1f #define DEF_HUE 0x10 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK)) #define DEF_AECH 0x4D #define CLKRC_6MHz 0x00 #define CLKRC_12MHz 0x40 #define CLKRC_16MHz 0x80 #define CLKRC_24MHz 0xc0 #define CLKRC_DIV_MASK 0x3f #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1) #define DEF_CLKRC 0x00 #define COMA_RESET BIT(7) #define COMA_QCIF BIT(5) #define COMA_RAW_RGB BIT(4) #define COMA_RGB BIT(3) #define COMA_BW BIT(2) #define COMA_WORD_SWAP BIT(1) #define COMA_BYTE_SWAP BIT(0) #define DEF_COMA 0x00 #define COMB_FLIP_V BIT(7) #define COMB_FLIP_H BIT(5) #define COMB_BAND_FILTER BIT(4) #define COMB_AWB BIT(2) #define COMB_AGC BIT(1) #define COMB_AEC BIT(0) #define DEF_COMB 0x5f #define COML_ONE_CHANNEL BIT(7) #define DEF_HSTRT 0x24 #define DEF_HSTOP 0xd4 #define DEF_VSTRT 0x04 #define DEF_VSTOP 0x94 #define COMF_HREF_LOW BIT(4) #define COMJ_PCLK_RISING BIT(4) #define COMJ_VSYNC_HIGH BIT(0) /* supported resolutions */ #define W_QCIF (DEF_HSTOP - DEF_HSTRT) #define W_CIF (W_QCIF << 1) #define H_QCIF (DEF_VSTOP - DEF_VSTRT) #define H_CIF (H_QCIF << 1) #define FRAME_RATE_MAX 30 struct ov6650_reg { u8 reg; u8 val; }; struct ov6650 { struct v4l2_subdev subdev; struct v4l2_ctrl_handler hdl; struct { /* exposure/autoexposure cluster */ struct v4l2_ctrl *autoexposure; struct v4l2_ctrl *exposure; }; struct { /* gain/autogain cluster */ struct v4l2_ctrl *autogain; struct v4l2_ctrl *gain; }; struct { /* blue/red/autowhitebalance cluster */ struct v4l2_ctrl *autowb; struct v4l2_ctrl *blue; struct v4l2_ctrl *red; }; struct v4l2_clk *clk; bool half_scale; /* scale down output by 2 */ struct v4l2_rect rect; /* sensor cropping window */ unsigned long pclk_max; /* from resolution and format */ struct v4l2_fract tpf; /* as requested with s_frame_interval */ u32 code; }; static u32 ov6650_codes[] = { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_YVYU8_2X8, MEDIA_BUS_FMT_VYUY8_2X8, MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_Y8_1X8, }; static const struct v4l2_mbus_framefmt ov6650_def_fmt = { .width = W_CIF, .height = H_CIF, .code = MEDIA_BUS_FMT_SBGGR8_1X8, .colorspace = V4L2_COLORSPACE_SRGB, .field = V4L2_FIELD_NONE, .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT, .quantization = V4L2_QUANTIZATION_DEFAULT, .xfer_func = V4L2_XFER_FUNC_DEFAULT, }; /* read a register */ static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val) { int ret; u8 data = reg; struct i2c_msg msg = { .addr = client->addr, .flags = 0, .len = 1, .buf = &data, }; ret = i2c_transfer(client->adapter, &msg, 1); if (ret < 0) goto err; msg.flags = I2C_M_RD; ret = i2c_transfer(client->adapter, &msg, 1); if (ret < 0) goto err; *val = data; return 0; err: dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg); return ret; } /* write a register */ static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val) { int ret; unsigned char data[2] = { reg, val }; struct i2c_msg msg = { .addr = client->addr, .flags = 0, .len = 2, .buf = data, }; ret = i2c_transfer(client->adapter, &msg, 1); udelay(100); if (ret < 0) { dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg); return ret; } return 0; } /* Read a register, alter its bits, write it back */ static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask) { u8 val; int ret; ret = ov6650_reg_read(client, reg, &val); if (ret) { dev_err(&client->dev, "[Read]-Modify-Write of register 0x%02x failed!\n", reg); return ret; } val &= ~mask; val |= set; ret = ov6650_reg_write(client, reg, val); if (ret) dev_err(&client->dev, "Read-Modify-[Write] of register 0x%02x failed!\n", reg); return ret; } static struct ov6650 *to_ov6650(const struct i2c_client *client) { return container_of(i2c_get_clientdata(client), struct ov6650, subdev); } /* Start/Stop streaming from the device */ static int ov6650_s_stream(struct v4l2_subdev *sd, int enable) { return 0; } /* Get status of additional camera capabilities */ static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl) { struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl); struct v4l2_subdev *sd = &priv->subdev; struct i2c_client *client = v4l2_get_subdevdata(sd); uint8_t reg, reg2; int ret; switch (ctrl->id) { case V4L2_CID_AUTOGAIN: ret = ov6650_reg_read(client, REG_GAIN, ®); if (!ret) priv->gain->val = reg; return ret; case V4L2_CID_AUTO_WHITE_BALANCE: ret = ov6650_reg_read(client, REG_BLUE, ®); if (!ret) ret = ov6650_reg_read(client, REG_RED, ®2); if (!ret) { priv->blue->val = reg; priv->red->val = reg2; } return ret; case V4L2_CID_EXPOSURE_AUTO: ret = ov6650_reg_read(client, REG_AECH, ®); if (!ret) priv->exposure->val = reg; return ret; } return -EINVAL; } /* Set status of additional camera capabilities */ static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl) { struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl); struct v4l2_subdev *sd = &priv->subdev; struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; switch (ctrl->id) { case V4L2_CID_AUTOGAIN: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val ? COMB_AGC : 0, COMB_AGC); if (!ret && !ctrl->val) ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val); return ret; case V4L2_CID_AUTO_WHITE_BALANCE: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val ? COMB_AWB : 0, COMB_AWB); if (!ret && !ctrl->val) { ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val); if (!ret) ret = ov6650_reg_write(client, REG_RED, priv->red->val); } return ret; case V4L2_CID_SATURATION: return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val), SAT_MASK); case V4L2_CID_HUE: return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val), HUE_MASK); case V4L2_CID_BRIGHTNESS: return ov6650_reg_write(client, REG_BRT, ctrl->val); case V4L2_CID_EXPOSURE_AUTO: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val == V4L2_EXPOSURE_AUTO ? COMB_AEC : 0, COMB_AEC); if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL) ret = ov6650_reg_write(client, REG_AECH, priv->exposure->val); return ret; case V4L2_CID_GAMMA: return ov6650_reg_write(client, REG_GAM1, ctrl->val); case V4L2_CID_VFLIP: return ov6650_reg_rmw(client, REG_COMB, ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V); case V4L2_CID_HFLIP: return ov6650_reg_rmw(client, REG_COMB, ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H); } return -EINVAL; } #ifdef CONFIG_VIDEO_ADV_DEBUG static int ov6650_get_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; u8 val; if (reg->reg & ~0xff) return -EINVAL; reg->size = 1; ret = ov6650_reg_read(client, reg->reg, &val); if (!ret) reg->val = (__u64)val; return ret; } static int ov6650_set_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); if (reg->reg & ~0xff || reg->val & ~0xff) return -EINVAL; return ov6650_reg_write(client, reg->reg, reg->val); } #endif static int ov6650_s_power(struct v4l2_subdev *sd, int on) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); int ret = 0; if (on) ret = v4l2_clk_enable(priv->clk); else v4l2_clk_disable(priv->clk); return ret; } static int ov6650_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; switch (sel->target) { case V4L2_SEL_TGT_CROP_BOUNDS: sel->r.left = DEF_HSTRT << 1; sel->r.top = DEF_VSTRT << 1; sel->r.width = W_CIF; sel->r.height = H_CIF; return 0; case V4L2_SEL_TGT_CROP: sel->r = priv->rect; return 0; default: return -EINVAL; } } static int ov6650_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); int ret; if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || sel->target != V4L2_SEL_TGT_CROP) return -EINVAL; v4l_bound_align_image(&sel->r.width, 2, W_CIF, 1, &sel->r.height, 2, H_CIF, 1, 0); v4l_bound_align_image(&sel->r.left, DEF_HSTRT << 1, (DEF_HSTRT << 1) + W_CIF - (__s32)sel->r.width, 1, &sel->r.top, DEF_VSTRT << 1, (DEF_VSTRT << 1) + H_CIF - (__s32)sel->r.height, 1, 0); ret = ov6650_reg_write(client, REG_HSTRT, sel->r.left >> 1); if (!ret) { priv->rect.width += priv->rect.left - sel->r.left; priv->rect.left = sel->r.left; ret = ov6650_reg_write(client, REG_HSTOP, (sel->r.left + sel->r.width) >> 1); } if (!ret) { priv->rect.width = sel->r.width; ret = ov6650_reg_write(client, REG_VSTRT, sel->r.top >> 1); } if (!ret) { priv->rect.height += priv->rect.top - sel->r.top; priv->rect.top = sel->r.top; ret = ov6650_reg_write(client, REG_VSTOP, (sel->r.top + sel->r.height) >> 1); } if (!ret) priv->rect.height = sel->r.height; return ret; } static int ov6650_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *mf = &format->format; struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); if (format->pad) return -EINVAL; /* initialize response with default media bus frame format */ *mf = ov6650_def_fmt; /* update media bus format code and frame size */ if (format->which == V4L2_SUBDEV_FORMAT_TRY) { mf->width = cfg->try_fmt.width; mf->height = cfg->try_fmt.height; mf->code = cfg->try_fmt.code; } else { mf->width = priv->rect.width >> priv->half_scale; mf->height = priv->rect.height >> priv->half_scale; mf->code = priv->code; } return 0; } static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect) { return width > rect->width >> 1 || height > rect->height >> 1; } static u8 to_clkrc(struct v4l2_fract *timeperframe, unsigned long pclk_max) { unsigned long pclk; if (timeperframe->numerator && timeperframe->denominator) pclk = pclk_max * timeperframe->denominator / (FRAME_RATE_MAX * timeperframe->numerator); else pclk = pclk_max; return (pclk_max - 1) / pclk; } /* set the format we will capture in */ static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect); struct v4l2_subdev_selection sel = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, .target = V4L2_SEL_TGT_CROP, .r.left = priv->rect.left + (priv->rect.width >> 1) - (mf->width >> (1 - half_scale)), .r.top = priv->rect.top + (priv->rect.height >> 1) - (mf->height >> (1 - half_scale)), .r.width = mf->width << half_scale, .r.height = mf->height << half_scale, }; u32 code = mf->code; unsigned long mclk, pclk; u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc; int ret; /* select color matrix configuration for given color encoding */ switch (code) { case MEDIA_BUS_FMT_Y8_1X8: dev_dbg(&client->dev, "pixel format GREY8_1X8\n"); coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP; coma_set |= COMA_BW; break; case MEDIA_BUS_FMT_YUYV8_2X8: dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n"); coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP; coma_set |= COMA_WORD_SWAP; break; case MEDIA_BUS_FMT_YVYU8_2X8: dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n"); coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP | COMA_BYTE_SWAP; break; case MEDIA_BUS_FMT_UYVY8_2X8: dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n"); if (half_scale) { coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; coma_set |= COMA_BYTE_SWAP; } else { coma_mask |= COMA_RGB | COMA_BW; coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; } break; case MEDIA_BUS_FMT_VYUY8_2X8: dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n"); if (half_scale) { coma_mask |= COMA_RGB | COMA_BW; coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP; } else { coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP; coma_set |= COMA_BYTE_SWAP; } break; case MEDIA_BUS_FMT_SBGGR8_1X8: dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n"); coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP; coma_set |= COMA_RAW_RGB | COMA_RGB; break; default: dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code); return -EINVAL; } if (code == MEDIA_BUS_FMT_Y8_1X8 || code == MEDIA_BUS_FMT_SBGGR8_1X8) { coml_mask = COML_ONE_CHANNEL; coml_set = 0; priv->pclk_max = 4000000; } else { coml_mask = 0; coml_set = COML_ONE_CHANNEL; priv->pclk_max = 8000000; } if (half_scale) { dev_dbg(&client->dev, "max resolution: QCIF\n"); coma_set |= COMA_QCIF; priv->pclk_max /= 2; } else { dev_dbg(&client->dev, "max resolution: CIF\n"); coma_mask |= COMA_QCIF; } clkrc = CLKRC_12MHz; mclk = 12000000; dev_dbg(&client->dev, "using 12MHz input clock\n"); clkrc |= to_clkrc(&priv->tpf, priv->pclk_max); pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc); dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n", mclk / pclk, 10 * mclk % pclk / pclk); ret = ov6650_set_selection(sd, NULL, &sel); if (!ret) ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask); if (!ret) ret = ov6650_reg_write(client, REG_CLKRC, clkrc); if (!ret) { priv->half_scale = half_scale; ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask); } if (!ret) priv->code = code; return ret; } static int ov6650_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *mf = &format->format; struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); if (format->pad) return -EINVAL; if (is_unscaled_ok(mf->width, mf->height, &priv->rect)) v4l_bound_align_image(&mf->width, 2, W_CIF, 1, &mf->height, 2, H_CIF, 1, 0); switch (mf->code) { case MEDIA_BUS_FMT_Y10_1X10: mf->code = MEDIA_BUS_FMT_Y8_1X8; /* fall through */ case MEDIA_BUS_FMT_Y8_1X8: case MEDIA_BUS_FMT_YVYU8_2X8: case MEDIA_BUS_FMT_YUYV8_2X8: case MEDIA_BUS_FMT_VYUY8_2X8: case MEDIA_BUS_FMT_UYVY8_2X8: break; default: mf->code = MEDIA_BUS_FMT_SBGGR8_1X8; /* fall through */ case MEDIA_BUS_FMT_SBGGR8_1X8: break; } if (format->which == V4L2_SUBDEV_FORMAT_TRY) { /* store media bus format code and frame size in pad config */ cfg->try_fmt.width = mf->width; cfg->try_fmt.height = mf->height; cfg->try_fmt.code = mf->code; /* return default mbus frame format updated with pad config */ *mf = ov6650_def_fmt; mf->width = cfg->try_fmt.width; mf->height = cfg->try_fmt.height; mf->code = cfg->try_fmt.code; } else { /* apply new media bus format code and frame size */ int ret = ov6650_s_fmt(sd, mf); if (ret) return ret; /* return default format updated with active size and code */ *mf = ov6650_def_fmt; mf->width = priv->rect.width >> priv->half_scale; mf->height = priv->rect.height >> priv->half_scale; mf->code = priv->code; } return 0; } static int ov6650_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 >= ARRAY_SIZE(ov6650_codes)) return -EINVAL; code->code = ov6650_codes[code->index]; return 0; } static int ov6650_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *ival) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); ival->interval.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf, priv->pclk_max)); ival->interval.denominator = FRAME_RATE_MAX; dev_dbg(&client->dev, "Frame interval: %u/%u s\n", ival->interval.numerator, ival->interval.denominator); return 0; } static int ov6650_s_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *ival) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); struct v4l2_fract *tpf = &ival->interval; int div, ret; u8 clkrc; if (tpf->numerator == 0 || tpf->denominator == 0) div = 1; /* Reset to full rate */ else div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator; if (div == 0) div = 1; else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK)) div = GET_CLKRC_DIV(CLKRC_DIV_MASK); tpf->numerator = div; tpf->denominator = FRAME_RATE_MAX; clkrc = to_clkrc(tpf, priv->pclk_max); ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK); if (!ret) { priv->tpf.numerator = GET_CLKRC_DIV(clkrc); priv->tpf.denominator = FRAME_RATE_MAX; *tpf = priv->tpf; } return ret; } /* Soft reset the camera. This has nothing to do with the RESET pin! */ static int ov6650_reset(struct i2c_client *client) { int ret; dev_dbg(&client->dev, "reset\n"); ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0); if (ret) dev_err(&client->dev, "An error occurred while entering soft reset!\n"); return ret; } /* program default register values */ static int ov6650_prog_dflt(struct i2c_client *client) { int ret; dev_dbg(&client->dev, "initializing\n"); ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */ if (!ret) ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER); return ret; } static int ov6650_video_probe(struct v4l2_subdev *sd) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); u8 pidh, pidl, midh, midl; int ret; priv->clk = v4l2_clk_get(&client->dev, NULL); if (IS_ERR(priv->clk)) { ret = PTR_ERR(priv->clk); dev_err(&client->dev, "v4l2_clk request err: %d\n", ret); return ret; } ret = ov6650_s_power(sd, 1); if (ret < 0) goto eclkput; msleep(20); /* * check and show product ID and manufacturer ID */ ret = ov6650_reg_read(client, REG_PIDH, &pidh); if (!ret) ret = ov6650_reg_read(client, REG_PIDL, &pidl); if (!ret) ret = ov6650_reg_read(client, REG_MIDH, &midh); if (!ret) ret = ov6650_reg_read(client, REG_MIDL, &midl); if (ret) goto done; if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", pidh, pidl); ret = -ENODEV; goto done; } dev_info(&client->dev, "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n", pidh, pidl, midh, midl); ret = ov6650_reset(client); if (!ret) ret = ov6650_prog_dflt(client); if (!ret) { struct v4l2_mbus_framefmt mf = ov6650_def_fmt; ret = ov6650_s_fmt(sd, &mf); } if (!ret) ret = v4l2_ctrl_handler_setup(&priv->hdl); done: ov6650_s_power(sd, 0); if (!ret) return 0; eclkput: v4l2_clk_put(priv->clk); return ret; } static const struct v4l2_ctrl_ops ov6550_ctrl_ops = { .g_volatile_ctrl = ov6550_g_volatile_ctrl, .s_ctrl = ov6550_s_ctrl, }; static const struct v4l2_subdev_core_ops ov6650_core_ops = { #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = ov6650_get_register, .s_register = ov6650_set_register, #endif .s_power = ov6650_s_power, }; /* Request bus settings on camera side */ static int ov6650_g_mbus_config(struct v4l2_subdev *sd, struct v4l2_mbus_config *cfg) { cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW | V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | V4L2_MBUS_DATA_ACTIVE_HIGH; cfg->type = V4L2_MBUS_PARALLEL; return 0; } /* Alter bus settings on camera side */ static int ov6650_s_mbus_config(struct v4l2_subdev *sd, const struct v4l2_mbus_config *cfg) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; if (cfg->flags & V4L2_MBUS_PCLK_SAMPLE_RISING) ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0); else ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING); if (ret) return ret; if (cfg->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0); else ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW); if (ret) return ret; if (cfg->flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0); else ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH); return ret; } static const struct v4l2_subdev_video_ops ov6650_video_ops = { .s_stream = ov6650_s_stream, .g_frame_interval = ov6650_g_frame_interval, .s_frame_interval = ov6650_s_frame_interval, .g_mbus_config = ov6650_g_mbus_config, .s_mbus_config = ov6650_s_mbus_config, }; static const struct v4l2_subdev_pad_ops ov6650_pad_ops = { .enum_mbus_code = ov6650_enum_mbus_code, .get_selection = ov6650_get_selection, .set_selection = ov6650_set_selection, .get_fmt = ov6650_get_fmt, .set_fmt = ov6650_set_fmt, }; static const struct v4l2_subdev_ops ov6650_subdev_ops = { .core = &ov6650_core_ops, .video = &ov6650_video_ops, .pad = &ov6650_pad_ops, }; static const struct v4l2_subdev_internal_ops ov6650_internal_ops = { .registered = ov6650_video_probe, }; /* * i2c_driver function */ static int ov6650_probe(struct i2c_client *client, const struct i2c_device_id *did) { struct ov6650 *priv; int ret; priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops); v4l2_ctrl_handler_init(&priv->hdl, 13); v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_AUTOGAIN, 0, 1, 1, 1); priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN); priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE); priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED); v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_SATURATION, 0, 0xf, 1, 0x8); v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE); v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80); priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO); priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH); v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops, V4L2_CID_GAMMA, 0, 0xff, 1, 0x12); priv->subdev.ctrl_handler = &priv->hdl; if (priv->hdl.error) { ret = priv->hdl.error; goto ectlhdlfree; } v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true); v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true); v4l2_ctrl_auto_cluster(2, &priv->autoexposure, V4L2_EXPOSURE_MANUAL, true); priv->rect.left = DEF_HSTRT << 1; priv->rect.top = DEF_VSTRT << 1; priv->rect.width = W_CIF; priv->rect.height = H_CIF; /* Hardware default frame interval */ priv->tpf.numerator = GET_CLKRC_DIV(DEF_CLKRC); priv->tpf.denominator = FRAME_RATE_MAX; priv->subdev.internal_ops = &ov6650_internal_ops; ret = v4l2_async_register_subdev(&priv->subdev); if (!ret) return 0; ectlhdlfree: v4l2_ctrl_handler_free(&priv->hdl); return ret; } static int ov6650_remove(struct i2c_client *client) { struct ov6650 *priv = to_ov6650(client); v4l2_clk_put(priv->clk); v4l2_async_unregister_subdev(&priv->subdev); v4l2_ctrl_handler_free(&priv->hdl); return 0; } static const struct i2c_device_id ov6650_id[] = { { "ov6650", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, ov6650_id); static struct i2c_driver ov6650_i2c_driver = { .driver = { .name = "ov6650", }, .probe = ov6650_probe, .remove = ov6650_remove, .id_table = ov6650_id, }; module_i2c_driver(ov6650_i2c_driver); MODULE_DESCRIPTION("V4L2 subdevice driver for OmniVision OV6650 camera sensor"); MODULE_AUTHOR("Janusz Krzysztofik