/* * V4L2 SoC Camera 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 initialy based on former work by Matt Callow * drivers/media/video/omap/sensor_ov6650.c * Copyright (C) 2006 Matt Callow * * 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 #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 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; int gain; int blue; int red; int saturation; int hue; int brightness; int exposure; int gamma; int aec; bool vflip; bool hflip; bool awb; bool agc; bool half_scale; /* scale down output by 2 */ struct v4l2_rect rect; /* sensor cropping window */ unsigned long pclk_limit; /* from host */ unsigned long pclk_max; /* from resolution and format */ struct v4l2_fract tpf; /* as requested with s_parm */ enum v4l2_mbus_pixelcode code; enum v4l2_colorspace colorspace; }; static enum v4l2_mbus_pixelcode ov6650_codes[] = { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_MBUS_FMT_UYVY8_2X8, V4L2_MBUS_FMT_YVYU8_2X8, V4L2_MBUS_FMT_VYUY8_2X8, V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_Y8_1X8, }; static const struct v4l2_queryctrl ov6650_controls[] = { { .id = V4L2_CID_AUTOGAIN, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "AGC", .minimum = 0, .maximum = 1, .step = 1, .default_value = 1, }, { .id = V4L2_CID_GAIN, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Gain", .minimum = 0, .maximum = 0x3f, .step = 1, .default_value = DEF_GAIN, }, { .id = V4L2_CID_AUTO_WHITE_BALANCE, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "AWB", .minimum = 0, .maximum = 1, .step = 1, .default_value = 1, }, { .id = V4L2_CID_BLUE_BALANCE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Blue", .minimum = 0, .maximum = 0xff, .step = 1, .default_value = DEF_BLUE, }, { .id = V4L2_CID_RED_BALANCE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Red", .minimum = 0, .maximum = 0xff, .step = 1, .default_value = DEF_RED, }, { .id = V4L2_CID_SATURATION, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Saturation", .minimum = 0, .maximum = 0xf, .step = 1, .default_value = 0x8, }, { .id = V4L2_CID_HUE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Hue", .minimum = 0, .maximum = HUE_MASK, .step = 1, .default_value = DEF_HUE, }, { .id = V4L2_CID_BRIGHTNESS, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Brightness", .minimum = 0, .maximum = 0xff, .step = 1, .default_value = 0x80, }, { .id = V4L2_CID_EXPOSURE_AUTO, .type = V4L2_CTRL_TYPE_INTEGER, .name = "AEC", .minimum = 0, .maximum = 3, .step = 1, .default_value = 0, }, { .id = V4L2_CID_EXPOSURE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Exposure", .minimum = 0, .maximum = 0xff, .step = 1, .default_value = DEF_AECH, }, { .id = V4L2_CID_GAMMA, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Gamma", .minimum = 0, .maximum = 0xff, .step = 1, .default_value = 0x12, }, { .id = V4L2_CID_VFLIP, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Flip Vertically", .minimum = 0, .maximum = 1, .step = 1, .default_value = 0, }, { .id = V4L2_CID_HFLIP, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Flip Horizontally", .minimum = 0, .maximum = 1, .step = 1, .default_value = 0, }, }; /* 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 ov6650_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); uint8_t reg; int ret = 0; switch (ctrl->id) { case V4L2_CID_AUTOGAIN: ctrl->value = priv->agc; break; case V4L2_CID_GAIN: if (priv->agc) { ret = ov6650_reg_read(client, REG_GAIN, ®); ctrl->value = reg; } else { ctrl->value = priv->gain; } break; case V4L2_CID_AUTO_WHITE_BALANCE: ctrl->value = priv->awb; break; case V4L2_CID_BLUE_BALANCE: if (priv->awb) { ret = ov6650_reg_read(client, REG_BLUE, ®); ctrl->value = reg; } else { ctrl->value = priv->blue; } break; case V4L2_CID_RED_BALANCE: if (priv->awb) { ret = ov6650_reg_read(client, REG_RED, ®); ctrl->value = reg; } else { ctrl->value = priv->red; } break; case V4L2_CID_SATURATION: ctrl->value = priv->saturation; break; case V4L2_CID_HUE: ctrl->value = priv->hue; break; case V4L2_CID_BRIGHTNESS: ctrl->value = priv->brightness; break; case V4L2_CID_EXPOSURE_AUTO: ctrl->value = priv->aec; break; case V4L2_CID_EXPOSURE: if (priv->aec) { ret = ov6650_reg_read(client, REG_AECH, ®); ctrl->value = reg; } else { ctrl->value = priv->exposure; } break; case V4L2_CID_GAMMA: ctrl->value = priv->gamma; break; case V4L2_CID_VFLIP: ctrl->value = priv->vflip; break; case V4L2_CID_HFLIP: ctrl->value = priv->hflip; break; } return ret; } /* Set status of additional camera capabilities */ static int ov6650_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); int ret = 0; switch (ctrl->id) { case V4L2_CID_AUTOGAIN: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->value ? COMB_AGC : 0, COMB_AGC); if (!ret) priv->agc = ctrl->value; break; case V4L2_CID_GAIN: ret = ov6650_reg_write(client, REG_GAIN, ctrl->value); if (!ret) priv->gain = ctrl->value; break; case V4L2_CID_AUTO_WHITE_BALANCE: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->value ? COMB_AWB : 0, COMB_AWB); if (!ret) priv->awb = ctrl->value; break; case V4L2_CID_BLUE_BALANCE: ret = ov6650_reg_write(client, REG_BLUE, ctrl->value); if (!ret) priv->blue = ctrl->value; break; case V4L2_CID_RED_BALANCE: ret = ov6650_reg_write(client, REG_RED, ctrl->value); if (!ret) priv->red = ctrl->value; break; case V4L2_CID_SATURATION: ret = ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->value), SAT_MASK); if (!ret) priv->saturation = ctrl->value; break; case V4L2_CID_HUE: ret = ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->value), HUE_MASK); if (!ret) priv->hue = ctrl->value; break; case V4L2_CID_BRIGHTNESS: ret = ov6650_reg_write(client, REG_BRT, ctrl->value); if (!ret) priv->brightness = ctrl->value; break; case V4L2_CID_EXPOSURE_AUTO: switch (ctrl->value) { case V4L2_EXPOSURE_AUTO: ret = ov6650_reg_rmw(client, REG_COMB, COMB_AEC, 0); break; default: ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_AEC); break; } if (!ret) priv->aec = ctrl->value; break; case V4L2_CID_EXPOSURE: ret = ov6650_reg_write(client, REG_AECH, ctrl->value); if (!ret) priv->exposure = ctrl->value; break; case V4L2_CID_GAMMA: ret = ov6650_reg_write(client, REG_GAM1, ctrl->value); if (!ret) priv->gamma = ctrl->value; break; case V4L2_CID_VFLIP: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->value ? COMB_FLIP_V : 0, COMB_FLIP_V); if (!ret) priv->vflip = ctrl->value; break; case V4L2_CID_HFLIP: ret = ov6650_reg_rmw(client, REG_COMB, ctrl->value ? COMB_FLIP_H : 0, COMB_FLIP_H); if (!ret) priv->hflip = ctrl->value; break; } return ret; } /* Get chip identification */ static int ov6650_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *id) { id->ident = V4L2_IDENT_OV6650; id->revision = 0; return 0; } #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, 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_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; a->c = priv->rect; return 0; } static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); struct v4l2_rect *rect = &a->c; int ret; if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; rect->left = ALIGN(rect->left, 2); rect->width = ALIGN(rect->width, 2); rect->top = ALIGN(rect->top, 2); rect->height = ALIGN(rect->height, 2); soc_camera_limit_side(&rect->left, &rect->width, DEF_HSTRT << 1, 2, W_CIF); soc_camera_limit_side(&rect->top, &rect->height, DEF_VSTRT << 1, 2, H_CIF); ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1); if (!ret) { priv->rect.left = rect->left; ret = ov6650_reg_write(client, REG_HSTOP, (rect->left + rect->width) >> 1); } if (!ret) { priv->rect.width = rect->width; ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1); } if (!ret) { priv->rect.top = rect->top; ret = ov6650_reg_write(client, REG_VSTOP, (rect->top + rect->height) >> 1); } if (!ret) priv->rect.height = rect->height; return ret; } static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) { if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; a->bounds.left = DEF_HSTRT << 1; a->bounds.top = DEF_VSTRT << 1; a->bounds.width = W_CIF; a->bounds.height = H_CIF; a->defrect = a->bounds; a->pixelaspect.numerator = 1; a->pixelaspect.denominator = 1; return 0; } static int ov6650_g_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); mf->width = priv->rect.width >> priv->half_scale; mf->height = priv->rect.height >> priv->half_scale; mf->code = priv->code; mf->colorspace = priv->colorspace; mf->field = V4L2_FIELD_NONE; 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_limit, 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; if (pclk_limit && pclk_limit < pclk) pclk = pclk_limit; 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 soc_camera_device *icd = client->dev.platform_data; struct soc_camera_sense *sense = icd->sense; struct ov6650 *priv = to_ov6650(client); bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect); struct v4l2_crop a = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, .c = { .left = priv->rect.left + (priv->rect.width >> 1) - (mf->width >> (1 - half_scale)), .top = priv->rect.top + (priv->rect.height >> 1) - (mf->height >> (1 - half_scale)), .width = mf->width << half_scale, .height = mf->height << half_scale, }, }; enum v4l2_mbus_pixelcode 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 V4L2_MBUS_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 V4L2_MBUS_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 V4L2_MBUS_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 V4L2_MBUS_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 V4L2_MBUS_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 V4L2_MBUS_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; } priv->code = code; if (code == V4L2_MBUS_FMT_Y8_1X8 || code == V4L2_MBUS_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 (code == V4L2_MBUS_FMT_SBGGR8_1X8) priv->colorspace = V4L2_COLORSPACE_SRGB; else if (code != 0) priv->colorspace = V4L2_COLORSPACE_JPEG; 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; } priv->half_scale = half_scale; if (sense) { if (sense->master_clock == 8000000) { dev_dbg(&client->dev, "8MHz input clock\n"); clkrc = CLKRC_6MHz; } else if (sense->master_clock == 12000000) { dev_dbg(&client->dev, "12MHz input clock\n"); clkrc = CLKRC_12MHz; } else if (sense->master_clock == 16000000) { dev_dbg(&client->dev, "16MHz input clock\n"); clkrc = CLKRC_16MHz; } else if (sense->master_clock == 24000000) { dev_dbg(&client->dev, "24MHz input clock\n"); clkrc = CLKRC_24MHz; } else { dev_err(&client->dev, "unspported input clock, check platform data\n"); return -EINVAL; } mclk = sense->master_clock; priv->pclk_limit = sense->pixel_clock_max; } else { clkrc = CLKRC_24MHz; mclk = 24000000; priv->pclk_limit = 0; dev_dbg(&client->dev, "using default 24MHz input clock\n"); } clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, 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_s_crop(sd, &a); 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) ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask); if (!ret) { mf->colorspace = priv->colorspace; mf->width = priv->rect.width >> half_scale; mf->height = priv->rect.height >> half_scale; } return ret; } static int ov6650_try_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); 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); mf->field = V4L2_FIELD_NONE; switch (mf->code) { case V4L2_MBUS_FMT_Y10_1X10: mf->code = V4L2_MBUS_FMT_Y8_1X8; case V4L2_MBUS_FMT_Y8_1X8: case V4L2_MBUS_FMT_YVYU8_2X8: case V4L2_MBUS_FMT_YUYV8_2X8: case V4L2_MBUS_FMT_VYUY8_2X8: case V4L2_MBUS_FMT_UYVY8_2X8: mf->colorspace = V4L2_COLORSPACE_JPEG; break; default: mf->code = V4L2_MBUS_FMT_SBGGR8_1X8; case V4L2_MBUS_FMT_SBGGR8_1X8: mf->colorspace = V4L2_COLORSPACE_SRGB; break; } return 0; } static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index, enum v4l2_mbus_pixelcode *code) { if (index >= ARRAY_SIZE(ov6650_codes)) return -EINVAL; *code = ov6650_codes[index]; return 0; } static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); struct v4l2_captureparm *cp = &parms->parm.capture; if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; memset(cp, 0, sizeof(*cp)); cp->capability = V4L2_CAP_TIMEPERFRAME; cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max)); cp->timeperframe.denominator = FRAME_RATE_MAX; dev_dbg(&client->dev, "Frame interval: %u/%u s\n", cp->timeperframe.numerator, cp->timeperframe.denominator); return 0; } static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct ov6650 *priv = to_ov6650(client); struct v4l2_captureparm *cp = &parms->parm.capture; struct v4l2_fract *tpf = &cp->timeperframe; int div, ret; u8 clkrc; if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; if (cp->extendedmode != 0) return -EINVAL; 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); /* * Keep result to be used as tpf limit * for subseqent clock divider calculations */ priv->tpf.numerator = div; priv->tpf.denominator = FRAME_RATE_MAX; clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max); ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK); if (!ret) { tpf->numerator = GET_CLKRC_DIV(clkrc); tpf->denominator = FRAME_RATE_MAX; } 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 soc_camera_device *icd, struct i2c_client *client) { u8 pidh, pidl, midh, midl; int ret = 0; /* * 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) return ret; if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) { dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n", pidh, pidl); return -ENODEV; } 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); return ret; } static struct soc_camera_ops ov6650_ops = { .controls = ov6650_controls, .num_controls = ARRAY_SIZE(ov6650_controls), }; static struct v4l2_subdev_core_ops ov6650_core_ops = { .g_ctrl = ov6650_g_ctrl, .s_ctrl = ov6650_s_ctrl, .g_chip_ident = ov6650_g_chip_ident, #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = ov6650_get_register, .s_register = ov6650_set_register, #endif }; /* Request bus settings on camera side */ static int ov6650_g_mbus_config(struct v4l2_subdev *sd, struct v4l2_mbus_config *cfg) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct soc_camera_device *icd = client->dev.platform_data; struct soc_camera_link *icl = to_soc_camera_link(icd); 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; cfg->flags = soc_camera_apply_board_flags(icl, cfg); 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); struct soc_camera_device *icd = client->dev.platform_data; struct soc_camera_link *icl = to_soc_camera_link(icd); unsigned long flags = soc_camera_apply_board_flags(icl, cfg); int ret; if (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 (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 (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 struct v4l2_subdev_video_ops ov6650_video_ops = { .s_stream = ov6650_s_stream, .g_mbus_fmt = ov6650_g_fmt, .s_mbus_fmt = ov6650_s_fmt, .try_mbus_fmt = ov6650_try_fmt, .enum_mbus_fmt = ov6650_enum_fmt, .cropcap = ov6650_cropcap, .g_crop = ov6650_g_crop, .s_crop = ov6650_s_crop, .g_parm = ov6650_g_parm, .s_parm = ov6650_s_parm, .g_mbus_config = ov6650_g_mbus_config, .s_mbus_config = ov6650_s_mbus_config, }; static struct v4l2_subdev_ops ov6650_subdev_ops = { .core = &ov6650_core_ops, .video = &ov6650_video_ops, }; /* * i2c_driver function */ static int ov6650_probe(struct i2c_client *client, const struct i2c_device_id *did) { struct ov6650 *priv; struct soc_camera_device *icd = client->dev.platform_data; struct soc_camera_link *icl; int ret; if (!icd) { dev_err(&client->dev, "Missing soc-camera data!\n"); return -EINVAL; } icl = to_soc_camera_link(icd); if (!icl) { dev_err(&client->dev, "Missing platform_data for driver\n"); return -EINVAL; } priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(&client->dev, "Failed to allocate memory for private data!\n"); return -ENOMEM; } v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops); icd->ops = &ov6650_ops; priv->rect.left = DEF_HSTRT << 1; priv->rect.top = DEF_VSTRT << 1; priv->rect.width = W_CIF; priv->rect.height = H_CIF; priv->half_scale = false; priv->code = V4L2_MBUS_FMT_YUYV8_2X8; priv->colorspace = V4L2_COLORSPACE_JPEG; ret = ov6650_video_probe(icd, client); if (ret) { icd->ops = NULL; kfree(priv); } return ret; } static int ov6650_remove(struct i2c_client *client) { struct ov6650 *priv = to_ov6650(client); kfree(priv); 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, }; static int __init ov6650_module_init(void) { return i2c_add_driver(&ov6650_i2c_driver); } static void __exit ov6650_module_exit(void) { i2c_del_driver(&ov6650_i2c_driver); } module_init(ov6650_module_init); module_exit(ov6650_module_exit); MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650"); MODULE_AUTHOR("Janusz Krzysztofik "); MODULE_LICENSE("GPL v2");