diff options
Diffstat (limited to 'drivers/media/i2c/ov6650.c')
| -rw-r--r-- | drivers/media/i2c/ov6650.c | 1125 |
1 files changed, 1125 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov6650.c b/drivers/media/i2c/ov6650.c new file mode 100644 index 0000000000..1ad07935f0 --- /dev/null +++ b/drivers/media/i2c/ov6650.c @@ -0,0 +1,1125 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * V4L2 subdevice driver for OmniVision OV6650 Camera Sensor + * + * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> + * + * Based on OmniVision OV96xx Camera Driver + * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com> + * + * Based on ov772x camera driver: + * Copyright (C) 2008 Renesas Solutions Corp. + * Kuninori Morimoto <morimoto.kuninori@renesas.com> + * + * Based on ov7670 and soc_camera_platform driver, + * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net> + * Copyright (C) 2008 Magnus Damm + * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> + * + * Hardware specific bits initially based on former work by Matt Callow + * drivers/media/video/omap/sensor_ov6650.c + * Copyright (C) 2006 Matt Callow + */ + +#include <linux/bitops.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/v4l2-mediabus.h> +#include <linux/module.h> + +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> + +/* 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_8MHz 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 clk *clk; + bool half_scale; /* scale down output by 2 */ + struct v4l2_rect rect; /* sensor cropping window */ + struct v4l2_fract tpf; /* as requested with s_frame_interval */ + u32 code; +}; + +struct ov6650_xclk { + unsigned long rate; + u8 clkrc; +}; + +static const struct ov6650_xclk ov6650_xclk[] = { +{ + .rate = 8000000, + .clkrc = CLKRC_8MHz, +}, +{ + .rate = 12000000, + .clkrc = CLKRC_12MHz, +}, +{ + .rate = 16000000, + .clkrc = CLKRC_16MHz, +}, +{ + .rate = 24000000, + .clkrc = CLKRC_24MHz, +}, +}; + +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 = clk_prepare_enable(priv->clk); + else + clk_disable_unprepare(priv->clk); + + return ret; +} + +static int ov6650_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_selection *sel) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov6650 *priv = to_ov6650(client); + struct v4l2_rect *rect; + + if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { + /* pre-select try crop rectangle */ + rect = &sd_state->pads->try_crop; + + } else { + /* pre-select active crop rectangle */ + rect = &priv->rect; + } + + 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: + /* use selected crop rectangle */ + sel->r = *rect; + return 0; + + default: + return -EINVAL; + } +} + +static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect) +{ + return width > rect->width >> 1 || height > rect->height >> 1; +} + +static void ov6650_bind_align_crop_rectangle(struct v4l2_rect *rect) +{ + v4l_bound_align_image(&rect->width, 2, W_CIF, 1, + &rect->height, 2, H_CIF, 1, 0); + v4l_bound_align_image(&rect->left, DEF_HSTRT << 1, + (DEF_HSTRT << 1) + W_CIF - (__s32)rect->width, 1, + &rect->top, DEF_VSTRT << 1, + (DEF_VSTRT << 1) + H_CIF - (__s32)rect->height, + 1, 0); +} + +static int ov6650_set_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_selection *sel) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov6650 *priv = to_ov6650(client); + int ret; + + if (sel->target != V4L2_SEL_TGT_CROP) + return -EINVAL; + + ov6650_bind_align_crop_rectangle(&sel->r); + + if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { + struct v4l2_rect *crop = &sd_state->pads->try_crop; + struct v4l2_mbus_framefmt *mf = &sd_state->pads->try_fmt; + /* detect current pad config scaling factor */ + bool half_scale = !is_unscaled_ok(mf->width, mf->height, crop); + + /* store new crop rectangle */ + *crop = sel->r; + + /* adjust frame size */ + mf->width = crop->width >> half_scale; + mf->height = crop->height >> half_scale; + + return 0; + } + + /* V4L2_SUBDEV_FORMAT_ACTIVE */ + + /* apply new crop rectangle */ + 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_state *sd_state, + 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 = sd_state->pads->try_fmt.width; + mf->height = sd_state->pads->try_fmt.height; + mf->code = sd_state->pads->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; +} + +#define to_clkrc(div) ((div) - 1) + +/* set the format we will capture in */ +static int ov6650_s_fmt(struct v4l2_subdev *sd, u32 code, bool half_scale) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct ov6650 *priv = to_ov6650(client); + u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask; + 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; + } else { + coml_mask = 0; + coml_set = COML_ONE_CHANNEL; + } + + if (half_scale) { + dev_dbg(&client->dev, "max resolution: QCIF\n"); + coma_set |= COMA_QCIF; + } else { + dev_dbg(&client->dev, "max resolution: CIF\n"); + coma_mask |= COMA_QCIF; + } + + ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask); + 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_state *sd_state, + 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); + struct v4l2_rect *crop; + bool half_scale; + + if (format->pad) + return -EINVAL; + + switch (mf->code) { + case MEDIA_BUS_FMT_Y10_1X10: + mf->code = MEDIA_BUS_FMT_Y8_1X8; + fallthrough; + 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; + fallthrough; + case MEDIA_BUS_FMT_SBGGR8_1X8: + break; + } + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) + crop = &sd_state->pads->try_crop; + else + crop = &priv->rect; + + half_scale = !is_unscaled_ok(mf->width, mf->height, crop); + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { + /* store new mbus frame format code and size in pad config */ + sd_state->pads->try_fmt.width = crop->width >> half_scale; + sd_state->pads->try_fmt.height = crop->height >> half_scale; + sd_state->pads->try_fmt.code = mf->code; + + /* return default mbus frame format updated with pad config */ + *mf = ov6650_def_fmt; + mf->width = sd_state->pads->try_fmt.width; + mf->height = sd_state->pads->try_fmt.height; + mf->code = sd_state->pads->try_fmt.code; + + } else { + int ret = 0; + + /* apply new media bus frame format and scaling if changed */ + if (mf->code != priv->code || half_scale != priv->half_scale) + ret = ov6650_s_fmt(sd, mf->code, half_scale); + 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_state *sd_state, + 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_enum_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_interval_enum *fie) +{ + int i; + + /* enumerate supported frame intervals not exceeding 1 second */ + if (fie->index > CLKRC_DIV_MASK || + GET_CLKRC_DIV(fie->index) > FRAME_RATE_MAX) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(ov6650_codes); i++) + if (fie->code == ov6650_codes[i]) + break; + if (i == ARRAY_SIZE(ov6650_codes)) + return -EINVAL; + + if (!fie->width || fie->width > W_CIF || + !fie->height || fie->height > H_CIF) + return -EINVAL; + + fie->interval.numerator = GET_CLKRC_DIV(fie->index); + fie->interval.denominator = FRAME_RATE_MAX; + + 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 = priv->tpf; + + 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; + + 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); + + ret = ov6650_reg_rmw(client, REG_CLKRC, to_clkrc(div), CLKRC_DIV_MASK); + if (!ret) { + priv->tpf.numerator = div; + 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, u8 clkrc) +{ + int ret; + + dev_dbg(&client->dev, "initializing\n"); + + ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */ + if (!ret) + ret = ov6650_reg_write(client, REG_CLKRC, clkrc); + 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); + const struct ov6650_xclk *xclk = NULL; + unsigned long rate; + u8 pidh, pidl, midh, midl; + int i, ret = 0; + + priv->clk = devm_clk_get(&client->dev, NULL); + if (IS_ERR(priv->clk)) { + ret = PTR_ERR(priv->clk); + dev_err(&client->dev, "clk request err: %d\n", ret); + return ret; + } + + rate = clk_get_rate(priv->clk); + for (i = 0; rate && i < ARRAY_SIZE(ov6650_xclk); i++) { + if (rate != ov6650_xclk[i].rate) + continue; + + xclk = &ov6650_xclk[i]; + dev_info(&client->dev, "using host default clock rate %lukHz\n", + rate / 1000); + break; + } + for (i = 0; !xclk && i < ARRAY_SIZE(ov6650_xclk); i++) { + ret = clk_set_rate(priv->clk, ov6650_xclk[i].rate); + if (ret || clk_get_rate(priv->clk) != ov6650_xclk[i].rate) + continue; + + xclk = &ov6650_xclk[i]; + dev_info(&client->dev, "using negotiated clock rate %lukHz\n", + xclk->rate / 1000); + break; + } + if (!xclk) { + dev_err(&client->dev, "unable to get supported clock rate\n"); + if (!ret) + ret = -EINVAL; + return ret; + } + + ret = ov6650_s_power(sd, 1); + if (ret < 0) + return ret; + + 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, xclk->clkrc); + if (!ret) { + /* driver default frame format, no scaling */ + ret = ov6650_s_fmt(sd, ov6650_def_fmt.code, false); + } + if (!ret) + ret = v4l2_ctrl_handler_setup(&priv->hdl); + +done: + ov6650_s_power(sd, 0); + 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_get_mbus_config(struct v4l2_subdev *sd, + unsigned int pad, + struct v4l2_mbus_config *cfg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 comj, comf; + int ret; + + ret = ov6650_reg_read(client, REG_COMJ, &comj); + if (ret) + return ret; + + ret = ov6650_reg_read(client, REG_COMF, &comf); + if (ret) + return ret; + + cfg->type = V4L2_MBUS_PARALLEL; + + cfg->bus.parallel.flags = V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH + | ((comj & COMJ_VSYNC_HIGH) ? V4L2_MBUS_VSYNC_ACTIVE_HIGH + : V4L2_MBUS_VSYNC_ACTIVE_LOW) + | ((comf & COMF_HREF_LOW) ? V4L2_MBUS_HSYNC_ACTIVE_LOW + : V4L2_MBUS_HSYNC_ACTIVE_HIGH) + | ((comj & COMJ_PCLK_RISING) ? V4L2_MBUS_PCLK_SAMPLE_RISING + : V4L2_MBUS_PCLK_SAMPLE_FALLING); + return 0; +} + +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, +}; + +static const struct v4l2_subdev_pad_ops ov6650_pad_ops = { + .enum_mbus_code = ov6650_enum_mbus_code, + .enum_frame_interval = ov6650_enum_frame_interval, + .get_selection = ov6650_get_selection, + .set_selection = ov6650_set_selection, + .get_fmt = ov6650_get_fmt, + .set_fmt = ov6650_set_fmt, + .get_mbus_config = ov6650_get_mbus_config, +}; + +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) +{ + 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 void ov6650_remove(struct i2c_client *client) +{ + struct ov6650 *priv = to_ov6650(client); + + v4l2_async_unregister_subdev(&priv->subdev); + v4l2_ctrl_handler_free(&priv->hdl); +} + +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 <jmkrzyszt@gmail.com"); +MODULE_LICENSE("GPL v2"); |