On Sun, 15 Mar 2009, Jonathan Cameron wrote:
> From: Jonathan Cameron <ji...@cam.ac.uk>
>
> OV7670 driver for soc-camera interfaces.
Much appreciated, thanks!
>
> ---
> There is already an ov7670 driver in tree, but it is very interface
> specific (olpc) and hence not much use for the crossbow IMB400 board
> which is plugged into an imote 2 pxa271 main board.
>
> Thanks go to Crossbow (www.xbow.com) for assistance in developing
> this driver.
>
> This is my first driver related to v4l let alone soc-camera so this
> is probably full of errors. All comments appreciated!
>
> A couple of questions related to this patch.
>
> Unfortunately the data ordering in rgb565 is not that expected by
> the pxa271 which for reasons best known to someone else shuffles
> the bit order coming off the camera. I don't know if this is a
> common problem. I haven't been able to come up with a combination
> of sensor and soc colour modes that will let this through. Anyone
> else met a similar problem? At the moment I'm relying on
> board specific documentation explaining how to rebuild the data
> once an image has been captured, but obviously this is far from
> ideal.
>
> The primary control on this chip related to shutter rate is actualy
> the frame rate. There are rather complex (and largerly undocumented)
> interactions between this setting and the auto brightness controls
> etc. Anyone have any suggestions on a better way of specifying this?
>
> Clearly this driver shares considerable portions of code with
> Jonathan Corbet's driver (in tree). It would be complex to combine
> the two drivers, but perhaps people feel this would be worthwhile?
Now, there we go... Hans, time for v4l2-device?...
This means, I will look through the driver, but we should really think
properly whether to pull it in now, or "just" convert the OLPC driver and
soc-camera to v4l2-device and thus enable re-use.
Thanks
Guennadi
>
> Thanks,
>
> ---
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index 19cf3b8..646aab3 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -779,6 +779,12 @@ config SOC_CAMERA_OV772X
> help
> This is a ov772x camera driver
>
> +config SOC_CAMERA_OV7670
> + tristate "ov7670 support with soc"
> + depends on SOC_CAMERA && I2C
> + help
> + This is an ov7670 driver using the soc camera interface
> +
> config VIDEO_PXA27x
> tristate "PXA27x Quick Capture Interface driver"
> depends on VIDEO_DEV && PXA27x && SOC_CAMERA
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index 72f6d03..ba70539 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -142,6 +142,7 @@ obj-$(CONFIG_SOC_CAMERA_MT9M001) += mt9m001.o
> obj-$(CONFIG_SOC_CAMERA_MT9M111) += mt9m111.o
> obj-$(CONFIG_SOC_CAMERA_MT9T031) += mt9t031.o
> obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o
> +obj-$(CONFIG_SOC_CAMERA_OV7670) += ov7670_soc.o
> obj-$(CONFIG_SOC_CAMERA_OV772X) += ov772x.o
> obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o
> obj-$(CONFIG_SOC_CAMERA_TW9910) += tw9910.o
> diff --git a/drivers/media/video/ov7670_soc.c
> b/drivers/media/video/ov7670_soc.c
> new file mode 100644
> index 0000000..63cbe3b
> --- /dev/null
> +++ b/drivers/media/video/ov7670_soc.c
> @@ -0,0 +1,1150 @@
> +/*
> + * A V4L2 driver for OmniVision OV7670 cameras via soc interface
> + *
> + * Copyright 2006 One Laptop Per Child Association, Inc. Written
> + * by Jonathan Corbet with substantial inspiration from Mark
> + * McClelland's ovcamchip code.
> + *
> + * Copyright 2006-7 Jonathan Corbet <cor...@lwn.net>
> + *
> + * Copyright 2009 Jonathan Cameron <ji...@cam.ac.uk>
> + *
> + * This file may be distributed under the terms of the GNU General
> + * Public License, version 2.
> + *
> + * Todo: Currently only VGA image resolution supported.
> + *
> + * Queries for review:
> + * 1) Here I'm using brightness controls for what are effectively shutter
> + * timings. How should this be done?
> + */
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/delay.h>
> +#include <linux/videodev2.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-chip-ident.h>
> +#include <linux/i2c.h>
> +#include <linux/gpio.h>
> +#include <linux/delay.h>
> +#include <media/soc_camera.h>
> +#include <media/ov7670_soc.h>
> +/*
> + * Basic window sizes. These probably belong somewhere more globally
> + * useful.
> + */
> +#define VGA_WIDTH 640
> +#define VGA_HEIGHT 480
> +#define QVGA_WIDTH 320
> +#define QVGA_HEIGHT 240
> +#define CIF_WIDTH 352
> +#define CIF_HEIGHT 288
> +#define QCIF_WIDTH 176
> +#define QCIF_HEIGHT 144
> +#define MAX_WIDTH VGA_WIDTH
> +#define MAX_HEIGHT VGA_HEIGHT
> +
> +/* Registers */
> +#define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */
> +#define REG_BLUE 0x01 /* blue gain */
> +#define REG_RED 0x02 /* red gain */
> +#define REG_VREF 0x03 /* Pieces of GAIN, VSTART, VSTOP */
> +#define REG_COM1 0x04 /* Control 1 */
> +#define COM1_CCIR656 0x40 /* CCIR656 enable */
> +#define REG_BAVE 0x05 /* U/B Average level */
> +#define REG_GbAVE 0x06 /* Y/Gb Average level */
> +#define REG_AECHH 0x07 /* AEC MS 5 bits */
> +#define REG_RAVE 0x08 /* V/R Average level */
> +#define REG_COM2 0x09 /* Control 2 */
> +#define COM2_SSLEEP 0x10 /* Soft sleep mode */
> +#define REG_PID 0x0a /* Product ID MSB */
> +#define REG_VER 0x0b /* Product ID LSB */
> +#define REG_COM3 0x0c /* Control 3 */
> +#define COM3_SWAP 0x40 /* Byte swap */
> +#define COM3_SCALEEN 0x08 /* Enable scaling */
> +#define COM3_DCWEN 0x04 /* Enable
> downsamp/crop/window */
> +#define REG_COM4 0x0d /* Control 4 */
> +#define REG_COM5 0x0e /* All "reserved" */
> +#define REG_COM6 0x0f /* Control 6 */
> +#define REG_AECH 0x10 /* More bits of AEC value */
> +#define REG_CLKRC 0x11 /* Clocl control */
> +#define CLK_EXT 0x40 /* Use external clock directly */
> +#define CLK_SCALE 0x3f /* Mask for internal clock
> scale */
> +#define REG_COM7 0x12 /* Control 7 */
> +#define COM7_RESET 0x80 /* Register reset */
> +#define COM7_FMT_MASK 0x38
> +#define COM7_FMT_VGA 0x00
> +#define COM7_FMT_CIF 0x20 /* CIF format */
> +#define COM7_FMT_QVGA 0x10 /* QVGA format */
> +#define COM7_FMT_QCIF 0x08 /* QCIF format */
> +#define COM7_RGB 0x04 /* bits 0 and 2 - RGB format
> */
> +#define COM7_YUV 0x00 /* YUV */
> +#define COM7_BAYER 0x01 /* Bayer format */
> +#define COM7_PBAYER 0x05 /* "Processed bayer" */
> +#define REG_COM8 0x13 /* Control 8 */
> +#define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */
> +#define COM8_AECSTEP 0x40 /* Unlimited AEC step size */
> +#define COM8_BFILT 0x20 /* Band filter enable */
> +#define COM8_AGC 0x04 /* Auto gain enable */
> +#define COM8_AWB 0x02 /* White balance enable */
> +#define COM8_AEC 0x01 /* Auto exposure enable */
> +#define REG_COM9 0x14 /* Control 9 - gain ceiling */
> +#define REG_COM10 0x15 /* Control 10 */
> +#define COM10_HSYNC 0x40 /* HSYNC instead of HREF */
> +#define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz
> blank */
> +#define COM10_HREF_REV 0x08 /* Reverse HREF */
> +#define COM10_VS_LEAD 0x04 /* VSYNC on clock leading
> edge */
> +#define COM10_VS_NEG 0x02 /* VSYNC negative */
> +#define COM10_HS_NEG 0x01 /* HSYNC negative */
> +#define REG_HSTART 0x17 /* Horiz start high bits */
> +#define REG_HSTOP 0x18 /* Horiz stop high bits */
> +#define REG_VSTART 0x19 /* Vert start high bits */
> +#define REG_VSTOP 0x1a /* Vert stop high bits */
> +#define REG_PSHFT 0x1b /* Pixel delay after HREF */
> +#define REG_MIDH 0x1c /* Manuf. ID high */
> +#define REG_MIDL 0x1d /* Manuf. ID low */
> +#define REG_MVFP 0x1e /* Mirror / vflip */
> +#define MVFP_MIRROR 0x20 /* Mirror image */
> +#define MVFP_FLIP 0x10 /* Vertical flip */
> +
> +#define REG_AEW 0x24 /* AGC upper limit */
> +#define REG_AEB 0x25 /* AGC lower limit */
> +#define REG_VPT 0x26 /* AGC/AEC fast mode op region */
> +#define REG_HSYST 0x30 /* HSYNC rising edge delay */
> +#define REG_HSYEN 0x31 /* HSYNC falling edge delay */
> +#define REG_HREF 0x32 /* HREF pieces */
> +#define REG_TSLB 0x3a /* lots of stuff */
> +#define TSLB_YLAST 0x04 /* UYVY or VYUY - see com13 */
> +#define REG_COM11 0x3b /* Control 11 */
> +#define COM11_NIGHT 0x80 /* NIght mode enable */
> +#define COM11_NMFR 0x60 /* Two bit NM frame rate */
> +#define COM11_HZAUTO 0x10 /* Auto detect 50/60 Hz */
> +#define COM11_50HZ 0x08 /* Manual 50Hz select */
> +#define COM11_EXP 0x02
> +#define REG_COM12 0x3c /* Control 12 */
> +#define COM12_HREF 0x80 /* HREF always */
> +#define REG_COM13 0x3d /* Control 13 */
> +#define COM13_GAMMA 0x80 /* Gamma enable */
> +#define COM13_UVSAT 0x40 /* UV saturation auto
> adjustment */
> +#define COM13_UVSWAP 0x01 /* V before U - w/TSLB */
> +#define REG_COM14 0x3e /* Control 14 */
> +#define COM14_DCWEN 0x10 /* DCW/PCLK-scale enable */
> +#define REG_EDGE 0x3f /* Edge enhancement factor */
> +#define REG_COM15 0x40 /* Control 15 */
> +#define COM15_R10F0 0x00 /* Data range 10 to F0 */
> +#define COM15_R01FE 0x80 /* 01 to FE */
> +#define COM15_R00FF 0xc0 /* 00 to FF */
> +#define COM15_RGB565 0x10 /* RGB565 output */
> +#define COM15_RGB555 0x30 /* RGB555 output */
> +#define REG_COM16 0x41 /* Control 16 */
> +#define COM16_AWBGAIN 0x08 /* AWB gain enable */
> +#define REG_COM17 0x42 /* Control 17 */
> +#define COM17_AECWIN 0xc0 /* AEC window - must match
> COM4 */
> +#define COM17_CBAR 0x08 /* DSP Color bar */
> +
> +#define REG_DNSTH 0x4C
> +/*
> + * This matrix defines how the colors are generated, must be
> + * tweaked to adjust hue and saturation.
> + *
> + * Order: v-red, v-green, v-blue, u-red, u-green, u-blue
> + *
> + * They are nine-bit signed quantities, with the sign bit
> + * stored in 0x58. Sign for v-red is bit 0, and up from there.
> + */
> +#define REG_CMATRIX_BASE 0x4f
> +#define CMATRIX_LEN 6
> +#define REG_CMATRIX_SIGN 0x58
> +
> +
> +#define REG_BRIGHT 0x55 /* Brightness */
> +#define REG_CONTRAS 0x56 /* Contrast control */
> +
> +#define REG_GFIX 0x69 /* Fix gain control */
> +#define REG_REG75 0x75 /* Edge enhancement lower limit */
> +#define REG_REG76 0x76 /* OV's name */
> +#define R76_BLKPCOR 0x80 /* Black pixel correction
> enable */
> +#define R76_WHTPCOR 0x40 /* White pixel correction
> enable */
> +#define REG_REG77 0x77 /* Denoise offset */
> +#define REG_RGB444 0x8c /* RGB 444 control */
> +#define R444_ENABLE 0x02 /* Turn on RGB444, overrides
> 5x5 */
> +#define R444_RGBX 0x01 /* Empty nibble at end */
> +
> +#define REG_HAECC1 0x9f /* Hist AEC/AGC control 1 */
> +#define REG_HAECC2 0xa0 /* Hist AEC/AGC control 2 */
> +
> +#define REG_BD50MAX 0xa5 /* 50hz banding step limit */
> +#define REG_HAECC3 0xa6 /* Hist AEC/AGC control 3 */
> +#define REG_HAECC4 0xa7 /* Hist AEC/AGC control 4 */
> +#define REG_HAECC5 0xa8 /* Hist AEC/AGC control 5 */
> +#define REG_HAECC6 0xa9 /* Hist AEC/AGC control 6 */
> +#define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */
> +#define REG_BD60MAX 0xab /* 60hz banding step limit */
> +struct ov7670_color_format {
> + char *name;
> + __u32 fourcc;
> + const struct regval_list *regs;
> + unsigned int option;
> + int cmatrix[6];
> +};
> +
> +struct ov7670_soc_win_size {
> + int width;
> + int height;
> + unsigned char com7_bit;
> + int hstart; /* Start/stop values for the camera. Note */
> + int hstop; /* that they do not always make complete */
> + int vstart; /* sense to humans, but evidently the sensor */
> + int vstop; /* will do the right thing... */
> + struct regval_list *regs; /* Regs to tweak */
> +/* h/vref stuff */
> +};
> +
> +/* Only vga implemented as yet */
> +static struct ov7670_soc_win_size ov7670_soc_win_sizes[] = {
> + /* VGA */
> + {
> + .width = VGA_WIDTH,
> + .height = VGA_HEIGHT,
> + .com7_bit = COM7_FMT_VGA,
> + .hstart = 158, /* These values from */
> + .hstop = 14, /* Omnivision */
> + .vstart = 10,
> + .vstop = 490,
> + .regs = NULL,
> + },
> + /* CIF */
> + {
> + .width = CIF_WIDTH,
> + .height = CIF_HEIGHT,
> + .com7_bit = COM7_FMT_CIF,
> + .hstart = 170, /* Empirically determined */
> + .hstop = 90,
> + .vstart = 14,
> + .vstop = 494,
> + .regs = NULL,
> + },
> + /* QVGA */
> + {
> + .width = QVGA_WIDTH,
> + .height = QVGA_HEIGHT,
> + .com7_bit = COM7_FMT_QVGA,
> + .hstart = 164, /* Empirically determined */
> + .hstop = 20,
> + .vstart = 14,
> + .vstop = 494,
> + .regs = NULL,
> + },
> +};
> +
> +struct ov7670_soc_priv {
> + struct i2c_client *client;
> + struct soc_camera_link *link;
> + struct soc_camera_device icd;
> + const struct ov7670_color_format *fmt;
> + const struct ov7670_soc_win_size *win;
> + int model;
> + int gpio_reset;
> + int gpio_power;
> + int hue;
> + int sat;
> + int autoexposure;
> +};
> +
> +struct regval_list {
> + unsigned char reg_num;
> + unsigned char value;
> +};
> +
> +static const struct v4l2_queryctrl ov7670_soc_controls[] = {
> + { /* Contrast register documentation is very vague */
> + .id = V4L2_CID_CONTRAST,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "Contrast",
> + .minimum = 0,
> + .maximum = 255,
> + .step = 1,
> + .default_value = 40,
> + }, {
> + .id = V4L2_CID_EXPOSURE_AUTO,
> + .name = "Auto Exposure",
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .minimum = 0,
> + .maximum = 1,
> + .step = 1,
> + .default_value = 1,
> + }, {
> + .id = V4L2_CID_AUTO_WHITE_BALANCE,
> + .name = "Auto White Balance",
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .minimum = 0,
> + .maximum = 1,
> + .step = 1,
> + .default_value = 1,
> + }, {
> + .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,
> + }, {
> + .id = V4L2_CID_BRIGHTNESS,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "Clock scaling", /* technically clock scaling */
> + .minimum = 0,
> + .maximum = 0x1F,
> + .step = 1,
> + .default_value = 3,
> + }, {
> + .id = V4L2_CID_HUE,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "Hue",
> + .minimum = -180,
> + .maximum = 180,
> + .step = 5,
> + .default_value = 0,
> + }, {
> + .id = V4L2_CID_SATURATION,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "Saturation",
> + .minimum = 0,
> + .maximum = 256,
> + .step = 1,
> + .default_value = 0x80,
> + }
> +};
> +
> +
> +static struct regval_list ov7670_default_regs[] = {
> + { REG_COM7, COM7_RESET },
> +/*
> + * Clock scale: 5 Bytes (frequency divided by 1 this)
> + * 3 = 15fps
> + * 2 = 20fps
> + * 1 = 30fps
> + */
> + { REG_CLKRC, 0x3 }, /* OV: clock scale (15 fps) */
> + { REG_TSLB, 0x04 }, /* OV */
> + { REG_COM7, 0 }, /* VGA */
> + /*
> + * Set the hardware window. These values from OV don't entirely
> + * make sense - hstop is less than hstart. But they work...
> + */
> + { REG_HSTART, 0x13 }, { REG_HSTOP, 0x01 },
> + { REG_HREF, 0xb6 }, { REG_VSTART, 0x02 },
> + { REG_VSTOP, 0x7a }, { REG_VREF, 0x0a },
> +
> + { REG_COM3, 0 }, { REG_COM14, 0 },
> + /* Mystery scaling numbers */
> + { 0x70, 0x3a }, { 0x71, 0x35 },
> + { 0x72, 0x11 }, { 0x73, 0xf0 },
> + { 0xa2, 0x02 }, { REG_COM10, 0x0 },
> +
> + /* Gamma curve values */
> + { 0x7a, 0x20 }, { 0x7b, 0x10 },
> + { 0x7c, 0x1e }, { 0x7d, 0x35 },
> + { 0x7e, 0x5a }, { 0x7f, 0x69 },
> + { 0x80, 0x76 }, { 0x81, 0x80 },
> + { 0x82, 0x88 }, { 0x83, 0x8f },
> + { 0x84, 0x96 }, { 0x85, 0xa3 },
> + { 0x86, 0xaf }, { 0x87, 0xc4 },
> + { 0x88, 0xd7 }, { 0x89, 0xe8 },
> +
> + /* AGC and AEC parameters. Note we start by disabling those features,
> + then turn them only after tweaking the values. */
> + { REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT },
> + { REG_GAIN, 0 }, { REG_AECH, 0 },
> + { REG_COM4, 0x40 }, /* magic reserved bit */
> + { REG_COM9, 0x18 }, /* 4x gain + magic rsvd bit */
> + { REG_BD50MAX, 0x05 }, { REG_BD60MAX, 0x07 },
> + { REG_AEW, 0x95 }, { REG_AEB, 0x33 },
> + { REG_VPT, 0xe3 }, { REG_HAECC1, 0x78 },
> + { REG_HAECC2, 0x68 }, { 0xa1, 0x03 }, /* magic */
> + { REG_HAECC3, 0xd8 }, { REG_HAECC4, 0xd8 },
> + { REG_HAECC5, 0xf0 }, { REG_HAECC6, 0x90 },
> + { REG_HAECC7, 0x94 },
> + { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC },
> +
> +
> + /* Almost all of these are magic "reserved" values. */
> + { REG_COM5, 0x61 }, { REG_COM6, 0x4b },
> + { 0x16, 0x02 }, { REG_MVFP, 0x07 },
> + { 0x21, 0x02 }, { 0x22, 0x91 },
> + { 0x29, 0x07 }, { 0x33, 0x0b },
> + { 0x35, 0x0b }, { 0x37, 0x1d },
> + { 0x38, 0x71 }, { 0x39, 0x2a },
> + { REG_COM12, 0x78 }, { 0x4d, 0x40 },
> + { 0x4e, 0x20 }, { REG_GFIX, 0 },
> + { 0x6b, 0x4a }, { 0x74, 0x10 },
> + { 0x8d, 0x4f }, { 0x8e, 0 },
> + { 0x8f, 0 }, { 0x90, 0 },
> + { 0x91, 0 }, { 0x96, 0 },
> + { 0x9a, 0 }, { 0xb0, 0x84 },
> + { 0xb1, 0x0c }, { 0xb2, 0x0e },
> + { 0xb3, 0x82 }, { 0xb8, 0x0a },
> +
> + /* More reserved magic, some of which tweaks white balance */
> + { 0x43, 0x0a }, { 0x44, 0xf0 },
> + { 0x45, 0x34 }, { 0x46, 0x58 },
> + { 0x47, 0x28 }, { 0x48, 0x3a },
> + { 0x59, 0x88 }, { 0x5a, 0x88 },
> + { 0x5b, 0x44 }, { 0x5c, 0x67 },
> + { 0x5d, 0x49 }, { 0x5e, 0x0e },
> + { 0x6c, 0x0a }, { 0x6d, 0x55 },
> + { 0x6e, 0x11 }, { 0x6f, 0x9f }, /* "9e for advance AWB" */
> + { 0x6a, 0x40 }, { REG_BLUE, 0x40 },
> + { REG_RED, 0x60 },
> + { REG_COM8, COM8_FASTAEC
> + | COM8_AECSTEP
> + | COM8_BFILT
> + | COM8_AGC
> + | COM8_AEC
> + | COM8_AWB },
> +
> + { REG_COM16, COM16_AWBGAIN }, { REG_EDGE, 0 },
> + /* Edge enhancement and black pixel / white pixel correction */
> + { REG_REG75, 0x05 }, { 0x76, 0xe1 },
> + /* Denoise strength and offest */
> + { REG_DNSTH, 0 }, { 0x77, 0x01 },
> + { REG_COM13, 0xc2 }, { 0x4b, 0x09 },
> + { 0xc9, 0x60 }, { REG_COM16, 0x38 },
> + { 0x56, 0x40 },
> +
> + { 0x34, 0x11 }, { REG_COM11, COM11_EXP|COM11_HZAUTO },
> + { 0xa4, 0x88 }, { 0x96, 0 },
> + { 0x97, 0x30 }, { 0x98, 0x20 },
> + { 0x99, 0x30 }, { 0x9a, 0x84 },
> + { 0x9b, 0x29 }, { 0x9c, 0x03 },
> + { 0x9d, 0x4c }, { 0x9e, 0x3f },
> + { 0x78, 0x04 },
> +
> + /* Extra-weird stuff. Some sort of multiplexor register */
> + { 0x79, 0x01 }, { 0xc8, 0xf0 },
> + { 0x79, 0x0f }, { 0xc8, 0x00 },
> + { 0x79, 0x10 }, { 0xc8, 0x7e },
> + { 0x79, 0x0a }, { 0xc8, 0x80 },
> + { 0x79, 0x0b }, { 0xc8, 0x01 },
> + { 0x79, 0x0c }, { 0xc8, 0x0f },
> + { 0x79, 0x0d }, { 0xc8, 0x20 },
> + { 0x79, 0x09 }, { 0xc8, 0x80 },
> + { 0x79, 0x02 }, { 0xc8, 0xc0 },
> + { 0x79, 0x03 }, { 0xc8, 0x40 },
> + { 0x79, 0x05 }, { 0xc8, 0x30 },
> + { 0x79, 0x26 },
> +
> + { 0xff, 0xff }, /* END MARKER */
> +};
> +
> +/*
> + * Here we'll try to encapsulate the changes for just the output
> + * video format.
> + *
> + * RGB656 and YUV422 come from OV; RGB444 is homebrewed.
> + *
> + * IMPORTANT RULE: the first entry must be for COM7, see ov7670_s_fmt for
> why.
> + */
> +
> +
> +static struct regval_list ov7670_fmt_yuv422[] = {
> + { REG_COM7, 0x0 }, /* Selects YUV mode */
> + { REG_RGB444, 0 }, /* No RGB444 please */
> + { REG_COM1, 0 }, /* no ccir656 aec low 2 lsb to 0 */
> + { REG_COM15, COM15_R00FF }, /* data range, 0x00 to 0xff */
> + { REG_COM9, 0x18 }, /* 4x gain ceiling; 0x8 is reserved bit */
> + { REG_COM13, 0},
> + { 0xff, 0xff },
> +};
> +
> +
> +static struct regval_list ov7670_fmt_rgb565[] = {
> + { REG_COM7, COM7_RGB }, /* Selects RGB mode */
> + { REG_RGB444, 0 }, /* No RGB444 please */
> + { REG_COM1, 0x0 },
> + { REG_COM15, COM15_RGB565 },
> + { REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */
> + { REG_COM13, COM13_GAMMA|COM13_UVSAT },
> + { 0xff, 0xff },
> +};
> +/* Not currently used */
> +static struct regval_list ov7670_fmt_raw[] = {
> + { REG_COM7, COM7_BAYER },
> + { REG_COM13, 0x08 }, /* No gamma, magic rsvd bit */
> + { REG_COM16, 0x3d }, /* Edge enhancement, denoise */
> + { REG_REG76, 0xe1 }, /* Pix correction, magic rsvd */
> + { 0xff, 0xff },
> +};
> +
> +#define SETFOURCC(type) .name = (#type), .fourcc = (V4L2_PIX_FMT_ ## type)
> +static const struct soc_camera_data_format ov7670_soc_fmt_lists[] = {
> + {
> + SETFOURCC(YUYV),
> + .depth = 16,
> + .colorspace = V4L2_COLORSPACE_JPEG,
> + }, {
> + SETFOURCC(RGB565),
> + .depth = 16,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + }, {
> + SETFOURCC(SBGGR8),
> + .depth = 8,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + }
> +};
> +
> +static const struct ov7670_color_format ov7670_cfmts[] = {
> + {
> + SETFOURCC(YUYV),
> + .regs = ov7670_fmt_yuv422,
> + .cmatrix = { 128, -128, 0, -34, -94, 128 },
> + }, {
> + SETFOURCC(RGB565),
> + .regs = ov7670_fmt_rgb565,
> + .cmatrix = { 179, -179, 0, -61, -176, 228 },
> + }, {
> + SETFOURCC(SBGGR8),
> + .regs = ov7670_fmt_raw,
> + .cmatrix = {0, 0, 0, 0, 0, 0},
> + },
> +};
> +
> +#define SIN_STEP 5
> +static const int ov7670_sin_table[] = {
> + 0, 87, 173, 258, 342, 422,
> + 499, 573, 642, 707, 766, 819,
> + 866, 906, 939, 965, 984, 996,
> + 1000
> +};
> +
> +static int ov7670_sine(int theta)
> +{
> + int chs = 1;
> + int sine;
> +
> + if (theta < 0) {
> + theta = -theta;
> + chs = -1;
> + }
> + if (theta <= 90)
> + sine = ov7670_sin_table[theta/SIN_STEP];
> + else {
> + theta -= 90;
> + sine = 1000 - ov7670_sin_table[theta/SIN_STEP];
> + }
> + return sine*chs;
> +}
> +
> +static int ov7670_cosine(int theta)
> +{
> + theta = 90 - theta;
> + if (theta > 180)
> + theta -= 360;
> + else if (theta < -180)
> + theta += 360;
> + return ov7670_sine(theta);
> +}
> +
> +static void ov7670_calc_cmatrix(struct ov7670_soc_priv *priv,
> + int matrix[CMATRIX_LEN])
> +{
> + int i;
> +
> + /*
> + * Apply the current saturation setting first.
> + */
> + for (i = 0; i < CMATRIX_LEN; i++)
> + matrix[i] = (priv->fmt->cmatrix[i]*priv->sat) >> 7;
> + /*
> + * Then, if need be, rotate the hue value.
> + */
> + if (priv->hue != 0) {
> + int sinth, costh, tmpmatrix[CMATRIX_LEN];
> +
> + memcpy(tmpmatrix, matrix, CMATRIX_LEN*sizeof(int));
> + sinth = ov7670_sine(priv->hue);
> + costh = ov7670_cosine(priv->hue);
> +
> + matrix[0] = (matrix[3]*sinth + matrix[0]*costh)/1000;
> + matrix[1] = (matrix[4]*sinth + matrix[1]*costh)/1000;
> + matrix[2] = (matrix[5]*sinth + matrix[2]*costh)/1000;
> + matrix[3] = (matrix[3]*costh - matrix[0]*sinth)/1000;
> + matrix[4] = (matrix[4]*costh - matrix[1]*sinth)/1000;
> + matrix[5] = (matrix[5]*costh - matrix[2]*sinth)/1000;
> + }
> +}
> +#define OV_VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
> +#define OV7670_VER OV_VERSION(0x76, 0x73)
> +
> +/* A quirk in smbus implementation requires a stop before a repeated
> + * start. This necesitates this function.
> + */
> +static s32 ov7670_smbus_read_byte_data(struct i2c_client *client, u8 command)
> +{
> + /* lifted from i2c_smbus_xfer_emulated */
> + unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX+3];
> + unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX+2];
> +
> + struct i2c_msg msg[2] = { {
> + client->addr,
> + client->flags,
> + 1,
> + msgbuf0
> + }, {
> + client->addr,
> + client->flags | I2C_M_RD,
> + 1,
> + msgbuf1
> + },
> + };
> + int status;
> +
> + msgbuf0[0] = command;
> + /* send the register address to read */
> + status = i2c_transfer(client->adapter, msg, 1);
> + if (status < 0)
> + return status;
> + status = i2c_transfer(client->adapter, &msg[1], 1);
> + if (status < 0)
> + return status;
> +
> + return msgbuf1[0];
> +}
> +
> +static int ov7670_soc_video_probe(struct soc_camera_device *icd)
> +{
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> + s32 pid, ver;
> + s32 ret;
> + const char *devname;
> +
> + icd->formats = ov7670_soc_fmt_lists;
> + icd->num_formats = ARRAY_SIZE(ov7670_soc_fmt_lists);
> +
> + /* Sanity check? */
> + i2c_smbus_write_byte_data(priv->client, REG_COM7, COM7_RESET);
> + mdelay(1);
> +
> + pid = ov7670_smbus_read_byte_data(priv->client, REG_PID);
> + ver = ov7670_smbus_read_byte_data(priv->client, REG_VER);
> + switch (OV_VERSION(pid, ver)) {
> + case OV7670_VER:
> + devname = "ov7670";
> + priv->model = V4L2_IDENT_OV7670;
> + break;
> + default:
> + dev_err(&icd->dev,
> + "Product ID error %x:%x\n", pid, ver);
> + return -ENODEV;
> + }
> + dev_info(&icd->dev,
> + "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
> + devname,
> + pid,
> + ver,
> + ov7670_smbus_read_byte_data(priv->client, REG_MIDH),
> + ov7670_smbus_read_byte_data(priv->client, REG_MIDL));
> + ret = soc_camera_video_start(icd);
> +
> + return ret;
> +}
> +
> +static void ov7670_soc_video_remove(struct soc_camera_device *icd)
> +{
> + soc_camera_video_stop(icd);
> +}
> +
> +static int ov7670_store_cmatrix(struct i2c_client *c, const int *matrix)
> +{
> + int signbits, i, ret;
> +
> + signbits = ov7670_smbus_read_byte_data(c, REG_CMATRIX_SIGN);
> + if (signbits < 0)
> + return -EIO;
> + signbits &= 0xc0;
> +
> + for (i = 0; i < 6; i++) {
> + u8 raw;
> + if (matrix[i] < 0) {
> + signbits |= (1 << i);
> + if (matrix[i] < -255)
> + raw = 0xff;
> + else
> + raw = (-1 * matrix[i]) & 0xff;
> + } else {
> + if (matrix[i] > 255)
> + raw = 0xff;
> + else
> + raw = matrix[i] & 0xff;
> + }
> + ret = i2c_smbus_write_byte_data(c, REG_CMATRIX_BASE + i, raw);
> + if (ret)
> + return -EIO;
> + }
> + return i2c_smbus_write_byte_data(c, REG_CMATRIX_SIGN, signbits);
> +}
> +static int ov7670_write_array(struct i2c_client *c, const struct regval_list
> *vals)
> +{
> + while (vals->reg_num != 0xff || vals->value != 0xff) {
> + int ret = i2c_smbus_write_byte_data(c,
> + vals->reg_num,
> + vals->value);
> + if (ret < 0)
> + return ret;
> + msleep(1);
> + vals++;
> + }
> + return 0;
> +}
> +static int ov7670_soc_init(struct soc_camera_device *icd)
> +{
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> + int ret = 0;
> +
> + if (priv->link->power) {
> + ret = priv->link->power(&priv->client->dev, 1);
> + if (ret < 0)
> + return ret;
> + }
> + if (priv->link->reset) {
> + ret = priv->link->reset(&priv->client->dev);
> + if (ret < 0)
> + return ret;
> + }
> + ret = ov7670_write_array(priv->client, ov7670_default_regs);
> + return ret;
> +}
> +
> +static int ov7670_soc_get_chip_id(struct soc_camera_device *icd,
> + struct v4l2_dbg_chip_ident *id)
> +{
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> +
> + id->ident = priv->model;
> + id->revision = 0;
> +
> + return 0;
> +}
> +
> +static unsigned long ov7670_soc_query_bus_param(struct soc_camera_device
> *icd)
> +{
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> + struct soc_camera_link *icl = priv->link;
> + unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
> + SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
> + SOCAM_DATAWIDTH_8;
> +
> + return soc_camera_apply_sensor_flags(icl, flags);
> +}
> +
> +static int ov7670_soc_set_bus_param(struct soc_camera_device *icd,
> + unsigned long flags)
> +{
> + return 0;
> +}
> +
> +static const struct ov7670_soc_win_size *
> +ov7670_soc_select_win(u32 width, u32 height)
> +{
> + const struct ov7670_soc_win_size *wsize;
> +
> + /* relies on them being in size order */
> + for (wsize = ov7670_soc_win_sizes;
> + wsize < ov7670_soc_win_sizes + ARRAY_SIZE(ov7670_soc_win_sizes);
> + wsize++)
> + if (width >= wsize->width && height >= wsize->height)
> + break;
> + if (wsize >= ov7670_soc_win_sizes + ARRAY_SIZE(ov7670_soc_win_sizes))
> + wsize--;
> +
> + return wsize;
> +}
> +
> +static int ov7670_soc_set_format(struct soc_camera_device *icd,
> + __u32 pixfmt,
> + struct v4l2_rect *rect)
> +{
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> + int ret = -EINVAL;
> + int i;
> + int data = 0 ;
> + int matrix[CMATRIX_LEN];
> + priv->fmt = NULL;
> + for (i = 0; i < ARRAY_SIZE(ov7670_cfmts); i++)
> + if (pixfmt == ov7670_cfmts[i].fourcc) {
> + priv->fmt = ov7670_cfmts + i;
> + ret = 0;
> + break;
> + }
> + if (priv->fmt->fourcc == V4L2_PIX_FMT_RGB565) {
> + data = ov7670_smbus_read_byte_data(priv->client,
> + REG_CLKRC);
> + if (ret)
> + goto error_ret;
> + }
> +
> + if (priv->fmt->regs) {
> + ret = ov7670_write_array(priv->client, priv->fmt->regs);
> + if (ret)
> + goto error_ret;
> + }
> + ov7670_calc_cmatrix(priv, matrix);
> + ret = ov7670_store_cmatrix(priv->client, matrix);
> + if (ret)
> + goto error_ret;
> + priv->win = ov7670_soc_select_win(rect->width, rect->height);
> + if (priv->fmt->fourcc == V4L2_PIX_FMT_RGB565)
> + ret = i2c_smbus_write_byte_data(priv->client,
> + REG_CLKRC,
> + data);
> +error_ret:
> + return ret;
> +}
> +
> +static int ov7670_soc_try_format(struct soc_camera_device *icd,
> + struct v4l2_format *f)
> +{
> + struct v4l2_pix_format *pix = &f->fmt.pix;
> + const struct ov7670_soc_win_size *win;
> +
> + win = ov7670_soc_select_win(pix->width, pix->height);
> + pix->width = win->width;
> + pix->height = win->height;
> + pix->field = V4L2_FIELD_NONE;
> +
> + return 0;
> +}
> +
> +static int ov7670_soc_stop_capture(struct soc_camera_device *icd)
> +{
> + return 0;
> +}
> +
> +static int ov7670_soc_start_capture(struct soc_camera_device *icd)
> +{
> + return 0;
> +}
> +
> +static int ov7670_soc_release(struct soc_camera_device *icd)
> +{
> + return 0;
> +}
> +
> +static int ov7670_soc_get_control(struct soc_camera_device *icd,
> + struct v4l2_control *ctrl)
> +{
> + int data;
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> + switch (ctrl->id) {
> + case V4L2_CID_CONTRAST:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_CONTRAS);
> + if (data < 0)
> + return data;
> + ctrl->value = data;
> + break;
> + case V4L2_CID_EXPOSURE_AUTO:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_COM8);
> + if (data < 0)
> + return data;
> + ctrl->value = !!(data & COM8_AEC);
> + break;
> + case V4L2_CID_AUTO_WHITE_BALANCE:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_COM8);
> + if (data < 0)
> + return data;
> + ctrl->value = !!(data & COM8_AWB);
> + break;
> + case V4L2_CID_AUTOGAIN:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_COM8);
> + if (data < 0)
> + return data;
> + ctrl->value = !!(data & COM8_AGC);
> + break;
> + case V4L2_CID_VFLIP:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_MVFP);
> + if (data < 0)
> + return data;
> + ctrl->value = !!(data & MVFP_FLIP);
> + break;
> + case V4L2_CID_HFLIP:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_MVFP);
> + if (data < 0)
> + return data;
> + ctrl->value = !!(data & MVFP_MIRROR);
> + break;
> + case V4L2_CID_BRIGHTNESS:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_CLKRC);
> + if (data < 0)
> + return data;
> + ctrl->value = data & 0x1F;
> + break;
> + case V4L2_CID_HUE:
> + ctrl->value = priv->hue;
> + break;
> + case V4L2_CID_SATURATION:
> + ctrl->value = priv->sat;
> + break;
> + };
> + return 0;
> +}
> +
> +static int ov7670_tweak_hue_or_sat(struct i2c_client *client,
> + struct ov7670_soc_priv *priv)
> +{
> + int matrix[6];
> + ov7670_calc_cmatrix(priv, matrix);
> + return ov7670_store_cmatrix(client, matrix);
> +}
> +/*
> + * Note that the brightness parameter is used for clock scaling. Effectively
> + * exposure. This is because soc-camera intercepts exposure (not sure why).
> + */
> +static int ov7670_soc_set_control(struct soc_camera_device *icd,
> + struct v4l2_control *ctrl)
> +{
> + int data, ret = 0;
> + struct ov7670_soc_priv *priv
> + = container_of(icd, struct ov7670_soc_priv, icd);
> + switch (ctrl->id) {
> + case V4L2_CID_EXPOSURE_AUTO:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_COM8);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + data = ctrl->value ? data | COM8_AEC : data & ~COM8_AEC;
> + ret = i2c_smbus_write_byte_data(priv->client, REG_COM8,
> + data);
> + break;
> + case V4L2_CID_AUTO_WHITE_BALANCE:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_COM8);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + data = ctrl->value ? data | COM8_AWB : data & ~COM8_AWB;
> + ret = i2c_smbus_write_byte_data(priv->client, REG_COM8,
> + data);
> + break;
> + case V4L2_CID_AUTOGAIN:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_COM8);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + data = ctrl->value ? data | COM8_AGC : data & ~COM8_AGC;
> + ret = i2c_smbus_write_byte_data(priv->client, REG_COM8,
> + data);
> + break;
> + case V4L2_CID_CONTRAST:
> + ret = i2c_smbus_write_byte_data(priv->client, REG_CONTRAS,
> + ctrl->value);
> + break;
> + case V4L2_CID_VFLIP:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_MVFP);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + data &= 127;
> + data = ctrl->value ? data | MVFP_FLIP : data & ~MVFP_FLIP;
> + ret = i2c_smbus_write_byte_data(priv->client, REG_MVFP,
> + data);
> + break;
> + case V4L2_CID_HFLIP:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_MVFP);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + ret = i2c_smbus_write_byte_data(priv->client, REG_MVFP,
> + ctrl->value ? data | MVFP_MIRROR
> + : data & ~MVFP_MIRROR);
> + break;
> + case V4L2_CID_BRIGHTNESS:
> + data = ov7670_smbus_read_byte_data(priv->client, REG_CLKRC);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + ret = i2c_smbus_write_byte_data(priv->client, REG_CLKRC,
> + ctrl->value |
> + (data & 0x80));
> + break;
> + case V4L2_CID_GAIN: /* doesn't seem to write successfully */
> + /* first disable auto stuff */
> + ret = i2c_smbus_write_byte_data(priv->client,
> + REG_COM8,
> + COM8_FASTAEC
> + | COM8_AECSTEP
> + | COM8_BFILT);
> + if (ret)
> + break;
> + ret = i2c_smbus_write_byte_data(priv->client, REG_GAIN,
> + ctrl->value & 0xFF);
> + if (ret)
> + break;
> + data = ov7670_smbus_read_byte_data(priv->client, REG_VREF);
> + if (data < 0) {
> + ret = data;
> + break;
> + }
> + ret = i2c_smbus_write_byte_data(priv->client, REG_VREF,
> + (data & ~0xC0) |
> + ((ctrl->value & 0x300) << 6));
> + if (ret)
> + break;
> + /* reenable auto stuff */
> + ret = i2c_smbus_write_byte_data(priv->client, REG_COM8,
> + COM8_FASTAEC |
> + COM8_AECSTEP |
> + COM8_BFILT |
> + COM8_AGC|COM8_AEC);
> + break;
> + case V4L2_CID_HUE:
> + /* update locale storage */
> + if (ctrl->value < -180 || ctrl->value > 180) {
> + ret = -EINVAL;
> + break;
> + }
> + priv->hue = ctrl->value;
> + ov7670_tweak_hue_or_sat(priv->client, priv);
> + break;
> + case V4L2_CID_SATURATION:
> + /* update locale storage */
> + if (ctrl->value < 0 || ctrl->value > 256) {
> + ret = -EINVAL;
> + break;
> + }
> + priv->sat = ctrl->value;
> + ov7670_tweak_hue_or_sat(priv->client, priv);
> + break;
> + };
> + return ret;
> +}
> +static struct soc_camera_ops ov7670_soc_ops = {
> + .owner = THIS_MODULE,
> + .probe = ov7670_soc_video_probe,
> + .remove = ov7670_soc_video_remove,
> + .init = ov7670_soc_init,
> + .release = ov7670_soc_release,
> + .start_capture = ov7670_soc_start_capture,
> + .stop_capture = ov7670_soc_stop_capture,
> + .set_fmt = ov7670_soc_set_format,
> + .try_fmt = ov7670_soc_try_format,
> + .set_bus_param = ov7670_soc_set_bus_param,
> + .query_bus_param = ov7670_soc_query_bus_param,
> + .get_chip_id = ov7670_soc_get_chip_id,
> + .controls = ov7670_soc_controls,
> + .num_controls = ARRAY_SIZE(ov7670_soc_controls),
> + .get_control = ov7670_soc_get_control,
> + .set_control = ov7670_soc_set_control,
> +};
> +
> +
> +
> +static int ov7670_soc_probe(struct i2c_client *client,
> + const struct i2c_device_id *did)
> +{
> + struct ov7670_soc_priv *priv;
> + struct soc_camera_device *icd;
> + struct ov7670_soc_camera_info *info = client->dev.platform_data;
> + int ret;
> + /* reset high for normal mode */
> + gpio_direction_output(info->gpio_reset, 1);
> + /* power down normal mode. */
> + gpio_direction_output(info->gpio_pwr, 0);
> +
> +/* perform a hard reset as per tinyos code */
> +
> + gpio_set_value(info->gpio_pwr, 1);
> + gpio_set_value(info->gpio_reset, 1);
> + mdelay(2);
> + gpio_set_value(info->gpio_pwr, 0);
> + gpio_set_value(info->gpio_reset, 0);
> + mdelay(2);
> + gpio_set_value(info->gpio_reset, 1);
> + mdelay(5);
> +
> + priv = kzalloc(sizeof *priv, GFP_KERNEL);
> + if (!priv) {
> + dev_err(&client->dev, "private data allocation failed\n");
> + return -ENOMEM;
> + }
> + priv->autoexposure = 1;
> + priv->link = info->iclink;
> + if (!priv->link) {
> + dev_err(&client->dev, "No platform data supplied\n");
> + return -EINVAL;
> + }
> + priv->sat = 128;
> + priv->client = client;
> + i2c_set_clientdata(client, priv);
> +
> + icd = &priv->icd;
> + icd->ops = &ov7670_soc_ops;
> + icd->control = &client->dev;
> + icd->width_max = MAX_WIDTH;
> + icd->height_max = MAX_HEIGHT;
> + icd->iface = priv->link->bus_id;
> +
> + ret = soc_camera_device_register(icd);
> + if (ret) {
> + dev_err(&client->dev, "failure registering device\n");
> + i2c_set_clientdata(client, NULL);
> + kfree(priv);
> + }
> + return ret;
> +}
> +
> +static int ov7670_soc_remove(struct i2c_client *client)
> +{
> + struct ov7670_soc_priv *priv = i2c_get_clientdata(client);
> + soc_camera_device_unregister(&priv->icd);
> + kfree(priv);
> + return 0;
> +}
> +static const struct i2c_device_id ov7670_soc_id[] = {
> + { "ov7670_soc", 0x15},
> + {},
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, ov7670_soc_id);
> +static struct i2c_driver ov7670_soc_i2c_driver = {
> + .driver = {
> + .name = "ov7670_soc",
> + },
> + .probe = ov7670_soc_probe,
> + .remove = ov7670_soc_remove,
> + .id_table = ov7670_soc_id,
> +};
> +
> +static int __init ov7670_module_init(void)
> +{
> + return i2c_add_driver(&ov7670_soc_i2c_driver);
> +}
> +
> +static void __exit ov7670_module_exit(void)
> +{
> + return i2c_del_driver(&ov7670_soc_i2c_driver);
> +}
> +
> +module_init(ov7670_module_init);
> +module_exit(ov7670_module_exit);
> +
> +MODULE_LICENSE("GPL");
> diff --git a/include/media/ov7670_soc.h b/include/media/ov7670_soc.h
> new file mode 100644
> index 0000000..e9419a4
> --- /dev/null
> +++ b/include/media/ov7670_soc.h
> @@ -0,0 +1,21 @@
> +/* ov7670_soc Camera
> + *
> + * Copyright (C) 2009 Jonathan Cameron <ji...@cam.ac.uk>
> + *
> + * 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.
> + */
> +
> +#ifndef __OV7670_SOC_H__
> +#define __OV7670_SOC_H__
> +
> +#include <media/soc_camera.h>
> +
> +struct ov7670_soc_camera_info {
> + int gpio_pwr;
> + int gpio_reset;
> + struct soc_camera_link *iclink;
> +};
> +
> +#endif
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
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