On Fri, 4 Sep 2009, Marek Vasut wrote:
> Dne Po 24. srpna 2009 20:06:29 Guennadi Liakhovetski napsal(a):
> > Hi Marek
> >
> > On Sat, 22 Aug 2009, Marek Vasut wrote:
> > > From 479aafc9a6540efec8a691a84aff166eb0218a72 Mon Sep 17 00:00:00 2001
> > > From: Marek Vasut <marek.vasut@xxxxxxxxx>
> > > Date: Sat, 22 Aug 2009 05:14:23 +0200
> > > Subject: [PATCH 2/3] Add driver for OmniVision OV9640 sensor
> > >
> > > Signed-off-by: Marek Vasut <marek.vasut@xxxxxxxxx>
> >
> > Ok, I see, you rebased your patches on my soc-camera patch-stack, this is
> > good, thanks. But you missed a couple of my comments - you still have a
> > few static functions in the ov9640.c marked inline: ov9640_set_crop() is
> > not used at all, ov9640_set_bus_param() gets assigned to a struct member,
> > so, cannot be inline. ov9640_alter_regs() is indeed only called at one
> > location, but see Chapter 15 in Documentation/CodingStyle. You left at
> > least one multi-line comment wrongly formatted. You left some broken
> > printk format lines, etc. You moved your header under drivers/... - that's
> > good. But, please, address all my comments that I provided in a private
> > review, or explain why you do not agree. Otherwise I feel like I wasted my
> > time. Besides, your mailer has wrapped lines. Please, read
> > Documentation/email-clients.txt on how to configure your email client to
> > send patches properly. In the worst case, you can inline your patches
> > while reviewing, and then attach them for a final submission. This is,
> > however, discouraged, because it makes review and test of your
> > intermediate patches with wrapped lines more difficult. Also, please check
> > your patches with scripts/checkpatch.pl.
> >
>
> Fixed patch follows, my mailer is fixed as much as possible (working on getting
> git-email to work, but that's still to be done). Please consider applying,
> thanks.
Ok, a couple more simple questions / remarks, In principle, there's just
one principle objection - if we agree, that the correct format is BGR565
and RGB565X, then we should change that. There's no BGR565 format
currently in the kernel, so, we'd have to add it (and the documentation
for the mercurial tree).
Thanks
Guennadi
>
> Add driver for OmniVision OV9640 sensor
>
> Signed-off-by: Marek Vasut <marek.vasut@xxxxxxxxx>
> ---
> drivers/media/video/Kconfig | 6 +
> drivers/media/video/Makefile | 1 +
> drivers/media/video/ov9640.c | 811 +++++++++++++++++++++++++++++++++++++++
> drivers/media/video/ov9640.h | 206 ++++++++++
> include/media/v4l2-chip-ident.h | 1 +
> 5 files changed, 1025 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/video/ov9640.c
> create mode 100644 drivers/media/video/ov9640.h
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index 84b6fc1..fddd654 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -772,6 +772,12 @@ config SOC_CAMERA_OV772X
> help
> This is a ov772x camera driver
>
> +config SOC_CAMERA_OV9640
> + tristate "ov9640 camera support"
> + depends on SOC_CAMERA && I2C
> + help
> + This is a ov9640 camera driver
> +
> config MX1_VIDEO
> bool
>
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index 9f2e321..e18efd5 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -76,6 +76,7 @@ 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_OV772X) += ov772x.o
> +obj-$(CONFIG_SOC_CAMERA_OV9640) += ov9640.o
> obj-$(CONFIG_SOC_CAMERA_TW9910) += tw9910.o
>
> # And now the v4l2 drivers:
> diff --git a/drivers/media/video/ov9640.c b/drivers/media/video/ov9640.c
> new file mode 100644
> index 0000000..289e82d
> --- /dev/null
> +++ b/drivers/media/video/ov9640.c
> @@ -0,0 +1,811 @@
> +/*
> + * OmniVision OV96xx Camera Driver
> + *
> + * Copyright (C) 2009 Marek Vasut <marek.vasut@xxxxxxxxx>
> + *
> + * Based on ov772x camera driver:
> + *
> + * Copyright (C) 2008 Renesas Solutions Corp.
> + * Kuninori Morimoto <morimoto.kuninori@xxxxxxxxxxx>
> + *
> + * Based on ov7670 and soc_camera_platform driver,
> + *
> + * Copyright 2006-7 Jonathan Corbet <corbet@xxxxxxx>
> + * Copyright (C) 2008 Magnus Damm
> + * Copyright (C) 2008, Guennadi Liakhovetski <kernel@xxxxxxxxxxxxxx>
> + *
> + * 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 <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/i2c.h>
> +#include <linux/slab.h>
> +#include <linux/delay.h>
> +#include <linux/videodev2.h>
> +#include <media/v4l2-chip-ident.h>
> +#include <media/v4l2-common.h>
> +#include <media/soc_camera.h>
> +
> +#include "ov9640.h"
> +
> +/* default register setup */
> +static const struct ov9640_reg ov9640_regs_dflt[] = {
> + { OV9640_COM5, OV9640_COM5_SYSCLK | OV9640_COM5_LONGEXP },
> + { OV9640_COM6, OV9640_COM6_OPT_BLC | OV9640_COM6_ADBLC_BIAS |
> + OV9640_COM6_FMT_RST | OV9640_COM6_ADBLC_OPTEN },
> + { OV9640_PSHFT, OV9640_PSHFT_VAL(0x01) },
> + { OV9640_ACOM, OV9640_ACOM_2X_ANALOG | OV9640_ACOM_RSVD },
> + { OV9640_COM16, OV9640_COM16_RB_AVG },
> +
> + /* Gamma curve P */
> + { 0x6c, 0x40 }, { 0x6d, 0x30 }, { 0x6e, 0x4b }, { 0x6f, 0x60 },
> + { 0x70, 0x70 }, { 0x71, 0x70 }, { 0x72, 0x70 }, { 0x73, 0x70 },
> + { 0x74, 0x60 }, { 0x75, 0x60 }, { 0x76, 0x50 }, { 0x77, 0x48 },
> + { 0x78, 0x3a }, { 0x79, 0x2e }, { 0x7a, 0x28 }, { 0x7b, 0x22 },
> +
> + /* Gamma curve T */
> + { 0x7c, 0x04 }, { 0x7d, 0x07 }, { 0x7e, 0x10 }, { 0x7f, 0x28 },
> + { 0x80, 0x36 }, { 0x81, 0x44 }, { 0x82, 0x52 }, { 0x83, 0x60 },
> + { 0x84, 0x6c }, { 0x85, 0x78 }, { 0x86, 0x8c }, { 0x87, 0x9e },
> + { 0x88, 0xbb }, { 0x89, 0xd2 }, { 0x8a, 0xe6 },
> +};
> +
> +/* Configurations
> + * NOTE: for YUV, alter the following registers:
> + * COM12 |= OV9640_COM12_YUV_AVG
> + *
> + * for RGB, alter the following registers:
> + * COM7 |= OV9640_COM7_RGB
> + * COM13 |= OV9640_COM13_RGB_AVG
> + * COM15 |= proper RGB color encoding mode
> + */
> +static const struct ov9640_reg ov9640_regs_qqcif[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x0f) },
> + { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
> + { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
> + { OV9640_COM7, OV9640_COM7_QCIF },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_qqvga[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
> + { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
> + { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
> + { OV9640_COM7, OV9640_COM7_QVGA },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_qcif[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
> + { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
> + { OV9640_COM7, OV9640_COM7_QCIF },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_qvga[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
> + { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
> + { OV9640_COM7, OV9640_COM7_QVGA },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_cif[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
> + { OV9640_COM3, OV9640_COM3_VP },
> + { OV9640_COM7, OV9640_COM7_CIF },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_vga[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
> + { OV9640_COM3, OV9640_COM3_VP },
> + { OV9640_COM7, OV9640_COM7_VGA },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_sxga[] = {
> + { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
> + { OV9640_COM3, OV9640_COM3_VP },
> + { OV9640_COM7, 0 },
> + { OV9640_COM12, OV9640_COM12_RSVD },
> + { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
> + { OV9640_COM15, OV9640_COM15_OR_10F0 },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_yuv[] = {
> + { OV9640_MTX1, 0x50 },
> + { OV9640_MTX2, 0x43 },
> + { OV9640_MTX3, 0x0d },
> + { OV9640_MTX4, 0x19 },
> + { OV9640_MTX5, 0x4c },
> + { OV9640_MTX6, 0x65 },
> + { OV9640_MTX7, 0x40 },
> + { OV9640_MTX8, 0x40 },
> + { OV9640_MTX9, 0x40 },
> + { OV9640_MTXS, 0x0f },
> +};
> +
> +static const struct ov9640_reg ov9640_regs_rgb[] = {
> + { OV9640_MTX1, 0x71 },
> + { OV9640_MTX2, 0x3e },
> + { OV9640_MTX3, 0x0c },
> + { OV9640_MTX4, 0x33 },
> + { OV9640_MTX5, 0x72 },
> + { OV9640_MTX6, 0x00 },
> + { OV9640_MTX7, 0x2b },
> + { OV9640_MTX8, 0x66 },
> + { OV9640_MTX9, 0xd2 },
> + { OV9640_MTXS, 0x65 },
> +};
> +
> +/* NOTE: The RGB555X format still has issues, so it's left out. */
> +static const struct soc_camera_data_format ov9640_fmt_lists[] = {
> +{
> + .name = "VYUY",
> + .fourcc = V4L2_PIX_FMT_VYUY,
> + .depth = 16,
> + .colorspace = V4L2_COLORSPACE_JPEG,
> +},
> +{
> + .name = "RGB565X",
> + .fourcc = V4L2_PIX_FMT_RGB565X,
Hm, so, do we keep RGB565X here or do we add a BGR565? We'll anyway have
to do that when converting to imagebus, so, better do it right straight
away, to avoid having to modify user-space apps.
> + .depth = 16,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> +}
> +};
> +
> +static const struct v4l2_queryctrl ov9640_controls[] = {
> + {
> + .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 ov9640_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);
Are there any advantages in using raw i2c operations over smbus calls? The
latter look much simpler, cf., e.g., mt9m001:
static int reg_read(struct i2c_client *client, const u8 reg)
{
s32 data = i2c_smbus_read_word_data(client, reg);
return data < 0 ? data : swab16(data);
}
static int reg_write(struct i2c_client *client, const u8 reg,
const u16 data)
{
return i2c_smbus_write_word_data(client, reg, swab16(data));
}
Ok, going through smbus layer takes a bit of time, but that's just done
during configuration.
> + 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 ov9640_reg_write(struct i2c_client *client, u8 reg, u8 val)
> +{
> + int ret;
> + u8 _val;
> + 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);
> + if (ret < 0) {
> + dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
> + return ret;
> + }
> +
> + /* we have to read the register back ... no idea why, maybe HW bug */
> + ret = ov9640_reg_read(client, reg, &_val);
> + if (ret)
> + dev_err(&client->dev,
> + "Failed reading back register 0x%02x!\n", reg);
> +
> + return 0;
> +}
> +
> +
> +/* Read a register, alter its bits, write it back */
> +static int ov9640_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 unset)
> +{
> + u8 val;
> + int ret;
> +
> + ret = ov9640_reg_read(client, reg, &val);
> + if (ret) {
> + dev_err(&client->dev,
> + "[Read]-Modify-Write of register %02x failed!\n", reg);
> + return val;
> + }
> +
> + val |= set;
> + val &= ~unset;
> +
> + ret = ov9640_reg_write(client, reg, val);
> + if (ret)
> + dev_err(&client->dev,
> + "Read-Modify-[Write] of register %02x failed!\n", reg);
> +
> + return ret;
> +}
> +
> +/* Soft reset the camera. This has nothing to do with the RESET pin! */
> +static int ov9640_reset(struct i2c_client *client)
> +{
> + int ret;
> +
> + ret = ov9640_reg_write(client, OV9640_COM7, OV9640_COM7_SCCB_RESET);
> + if (ret)
> + dev_err(&client->dev,
> + "An error occured while entering soft reset!\n");
> +
> + return ret;
> +}
> +
> +/* Start/Stop streaming from the device */
> +static int ov9640_s_stream(struct v4l2_subdev *sd, int enable)
> +{
> + return 0;
> +}
> +
> +/* Alter bus settings on camera side */
> +static int ov9640_set_bus_param(struct soc_camera_device *icd,
> + unsigned long flags)
> +{
> + return 0;
> +}
> +
> +/* Request bus settings on camera side */
> +static unsigned long ov9640_query_bus_param(struct soc_camera_device *icd)
> +{
> + struct soc_camera_link *icl = to_soc_camera_link(icd);
> +
> + /*
> + * REVISIT: the camera probably can do 10 bit transfers, but I don't
> + * have those pins connected on my hardware.
> + */
> + unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
> + SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
> + SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATAWIDTH_8;
> +
> + return soc_camera_apply_sensor_flags(icl, flags);
> +}
> +
> +/* Get status of additional camera capabilities */
> +static int ov9640_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
> +{
> + struct i2c_client *client = sd->priv;
> + struct ov9640_priv *priv = container_of(i2c_get_clientdata(client),
> + struct ov9640_priv, subdev);
> +
> + switch (ctrl->id) {
> + case V4L2_CID_VFLIP:
> + ctrl->value = priv->flag_vflip;
> + break;
> + case V4L2_CID_HFLIP:
> + ctrl->value = priv->flag_hflip;
> + break;
> + }
> + return 0;
> +}
> +
> +/* Set status of additional camera capabilities */
> +static int ov9640_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
> +{
> + struct i2c_client *client = sd->priv;
> + struct ov9640_priv *priv = container_of(i2c_get_clientdata(client),
> + struct ov9640_priv, subdev);
> +
> + int ret = 0;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_VFLIP:
> + priv->flag_vflip = ctrl->value;
> + if (ctrl->value)
> + ret = ov9640_reg_rmw(client, OV9640_MVFP,
> + OV9640_MVFP_V, 0);
> + else
> + ret = ov9640_reg_rmw(client, OV9640_MVFP,
> + 0, OV9640_MVFP_V);
> + break;
> + case V4L2_CID_HFLIP:
> + priv->flag_hflip = ctrl->value;
> + if (ctrl->value)
> + ret = ov9640_reg_rmw(client, OV9640_MVFP,
> + OV9640_MVFP_H, 0);
> + else
> + ret = ov9640_reg_rmw(client, OV9640_MVFP,
> + 0, OV9640_MVFP_H);
> + break;
> + }
> +
> + return ret;
> +}
> +
> +/* Get chip identification */
> +static int ov9640_g_chip_ident(struct v4l2_subdev *sd,
> + struct v4l2_dbg_chip_ident *id)
> +{
> + struct i2c_client *client = sd->priv;
> + struct ov9640_priv *priv = container_of(i2c_get_clientdata(client),
> + struct ov9640_priv, subdev);
> +
> + id->ident = priv->model;
> + id->revision = priv->revision;
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> +static int ov9640_get_register(struct soc_camera_device *icd,
> + struct v4l2_dbg_register *reg)
> +{
> + struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
> + struct ov9640_priv *priv = i2c_get_clientdata(client);
> +
> + int ret;
> + u8 val;
> +
> + if (reg->reg & ~0xff)
> + return -EINVAL;
> +
> + reg->size = 1;
> +
> + ret = ov9640_read_reg(priv->client, reg->reg, &val);
> + if (ret)
> + return ret;
> +
> + reg->val = (__u64)val;
> +
> + return 0;
> +}
> +
> +static int ov9640_set_register(struct soc_camera_device *icd,
> + struct v4l2_dbg_register *reg)
> +{
> + struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
> + struct ov9640_priv *priv = i2c_get_clientdata(client);
> +
> + if (reg->reg & ~0xff || reg->val & ~0xff)
> + return -EINVAL;
> +
> + return ov9640_write_reg(priv->client, reg->reg, reg->val);
> +}
> +#endif
> +
> +/* select nearest higher resolution for capture */
> +static void ov9640_res_roundup(u32 *width, u32 *height)
> +{
> + int i;
> + enum { QQCIF, QQVGA, QCIF, QVGA, CIF, VGA, SXGA };
> + int res_x[] = { 88, 160, 176, 320, 352, 640, 1280 };
> + int res_y[] = { 72, 120, 144, 240, 288, 480, 960 };
> +
> + for (i = 0; i < ARRAY_SIZE(res_x); i++) {
> + if (res_x[i] >= *width && res_y[i] >= *height) {
> + *width = res_x[i];
> + *height = res_y[i];
> + return;
> + }
> + }
> +
> + *width = res_x[SXGA];
> + *height = res_y[SXGA];
> +}
> +
> +/* Prepare necessary register changes depending on color encoding */
> +static void ov9640_alter_regs(u32 pixfmt, struct ov9640_reg_alt *alt)
> +{
> + switch (pixfmt) {
> + case V4L2_PIX_FMT_VYUY:
> + alt->com12 = OV9640_COM12_YUV_AVG;
> + alt->com13 = OV9640_COM13_Y_DELAY_EN |
> + OV9640_COM13_YUV_DLY(0x01);
> + break;
> + case V4L2_PIX_FMT_RGB555X:
> + alt->com7 = OV9640_COM7_RGB;
> + alt->com13 = OV9640_COM13_RGB_AVG;
> + alt->com15 = OV9640_COM15_RGB_555;
> + break;
> + case V4L2_PIX_FMT_RGB565X:
> + alt->com7 = OV9640_COM7_RGB;
> + alt->com13 = OV9640_COM13_RGB_AVG;
> + alt->com15 = OV9640_COM15_RGB_565;
> + break;
> + };
> +}
> +
> +/* Setup registers according to resolution and color encoding */
> +static int ov9640_write_regs(struct i2c_client *client,
> + u32 width, u32 pixfmt, struct ov9640_reg_alt *alts)
> +{
> + const struct ov9640_reg *ov9640_regs, *matrix_regs;
> + int ov9640_regs_len, matrix_regs_len;
> + int i, ret;
> + u8 val;
> +
> + /* select register configuration for given resolution */
> + switch (width) {
> + case W_QQCIF:
> + ov9640_regs = ov9640_regs_qqcif;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqcif);
> + break;
> + case W_QQVGA:
> + ov9640_regs = ov9640_regs_qqvga;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqvga);
> + break;
> + case W_QCIF:
> + ov9640_regs = ov9640_regs_qcif;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qcif);
> + break;
> + case W_QVGA:
> + ov9640_regs = ov9640_regs_qvga;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qvga);
> + break;
> + case W_CIF:
> + ov9640_regs = ov9640_regs_cif;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_cif);
> + break;
> + case W_VGA:
> + ov9640_regs = ov9640_regs_vga;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_vga);
> + break;
> + case W_SXGA:
> + ov9640_regs = ov9640_regs_sxga;
> + ov9640_regs_len = ARRAY_SIZE(ov9640_regs_sxga);
> + break;
> + default:
> + dev_err(&client->dev, "Failed to select resolution!\n");
> + return -EINVAL;
> + }
> +
> + /* select color matrix configuration for given color encoding */
> + if (pixfmt == V4L2_PIX_FMT_VYUY) {
> + matrix_regs = ov9640_regs_yuv;
> + matrix_regs_len = ARRAY_SIZE(ov9640_regs_yuv);
> + } else {
> + matrix_regs = ov9640_regs_rgb;
> + matrix_regs_len = ARRAY_SIZE(ov9640_regs_rgb);
> + }
> +
> + /* write register settings into the module */
> + for (i = 0; i < ov9640_regs_len; i++) {
> + val = ov9640_regs[i].val;
> +
> + switch (ov9640_regs[i].reg) {
> + case OV9640_COM7:
> + val |= alts->com7;
> + break;
> + case OV9640_COM12:
> + val |= alts->com12;
> + break;
> + case OV9640_COM13:
> + val |= alts->com13;
> + break;
> + case OV9640_COM15:
> + val |= alts->com15;
> + break;
> + }
> +
> + ret = ov9640_reg_write(client, ov9640_regs[i].reg, val);
> + if (ret)
> + return ret;
> + }
> +
> + /* write color matrix configuration into the module */
> + for (i = 0; i < matrix_regs_len; i++) {
> + ret = ov9640_reg_write(client, matrix_regs[i].reg,
> + matrix_regs[i].val);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +/* program default register values */
> +static int ov9640_prog_dflt(struct i2c_client *client)
> +{
> + int i, ret;
> +
> + for (i = 0; i < ARRAY_SIZE(ov9640_regs_dflt); i++) {
> + ret = ov9640_reg_write(client, ov9640_regs_dflt[i].reg,
> + ov9640_regs_dflt[i].val);
> + if (ret)
> + return ret;
> + }
> +
> + /* wait for the changes to actually happen */
> + mdelay(150);
I still think that's a lot. Have you tried any lower values? I would try
50ms, if that works, try 10ms...
> +
> + return 0;
> +}
> +
> +/* set the format we will capture in */
> +static int ov9640_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
> +{
> + struct i2c_client *client = sd->priv;
> + struct v4l2_pix_format *pix = &f->fmt.pix;
> + struct ov9640_reg_alt alts = {0};
> + int ret;
> +
> + ov9640_res_roundup(&pix->width, &pix->height);
> + ov9640_alter_regs(pix->pixelformat, &alts);
> +
> + ov9640_reset(client);
> +
> + ret = ov9640_prog_dflt(client);
> + if (ret)
> + return ret;
> +
> + return ov9640_write_regs(client, pix->width, pix->pixelformat, &alts);
> +}
> +
> +static int ov9640_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
> +{
> + struct v4l2_pix_format *pix = &f->fmt.pix;
> +
> + ov9640_res_roundup(&pix->width, &pix->height);
> + pix->field = V4L2_FIELD_NONE;
> +
> + return 0;
> +}
> +
> +static int ov9640_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
> +{
> + a->c.left = 0;
> + a->c.top = 0;
> + a->c.width = W_SXGA;
> + a->c.height = H_SXGA;
> + a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> +
> + return 0;
> +}
> +
> +static int ov9640_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
> +{
> + a->bounds.left = 0;
> + a->bounds.top = 0;
> + a->bounds.width = W_SXGA;
> + a->bounds.height = H_SXGA;
> + a->defrect = a->bounds;
> + a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + a->pixelaspect.numerator = 1;
> + a->pixelaspect.denominator = 1;
> +
> + return 0;
> +}
> +
> +
> +
> +static int ov9640_video_probe(struct soc_camera_device *icd,
> + struct i2c_client *client)
> +{
> + struct ov9640_priv *priv = i2c_get_clientdata(client);
> + u8 pid, ver, midh, midl;
> + const char *devname;
> + int ret = 0;
> +
> + /*
> + * We must have a parent by now. And it cannot be a wrong one.
> + * So this entire test is completely redundant.
> + */
> + if (!icd->dev.parent ||
> + to_soc_camera_host(icd->dev.parent)->nr != icd->iface) {
> + dev_err(&icd->dev, "Parent missing or invalid!\n");
Please, see
http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commitdiff;h=d680a88e84792f84310042919065c90c5eb87423
> + ret = -ENODEV;
> + goto err;
> + }
> +
> + icd->formats = ov9640_fmt_lists;
> + icd->num_formats = ARRAY_SIZE(ov9640_fmt_lists);
> +
> + /*
> + * check and show product ID and manufacturer ID
> + */
> +
> + ret = ov9640_reg_read(client, OV9640_PID, &pid);
> + if (ret)
> + goto err;
> +
> + ret = ov9640_reg_read(client, OV9640_VER, &ver);
> + if (ret)
> + goto err;
> +
> + ret = ov9640_reg_read(client, OV9640_MIDH, &midh);
> + if (ret)
> + goto err;
> +
> + ret = ov9640_reg_read(client, OV9640_MIDL, &midl);
> + if (ret)
> + goto err;
> +
> + switch (VERSION(pid, ver)) {
> + case OV9640_V2:
> + devname = "ov9640";
> + priv->model = V4L2_IDENT_OV9640;
> + priv->revision = 2;
> + case OV9640_V3:
> + devname = "ov9640";
> + priv->model = V4L2_IDENT_OV9640;
> + priv->revision = 3;
> + break;
> + default:
> + dev_err(&icd->dev, "Product ID error %x:%x\n", pid, ver);
> + ret = -ENODEV;
> + goto err;
> + }
> +
> + dev_info(&icd->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
> + devname, pid, ver, midh, midl);
> +
> +err:
> + return ret;
> +}
> +
> +static struct soc_camera_ops ov9640_ops = {
> + .set_bus_param = ov9640_set_bus_param,
> + .query_bus_param = ov9640_query_bus_param,
> + .controls = ov9640_controls,
> + .num_controls = ARRAY_SIZE(ov9640_controls),
> +};
> +
> +static struct v4l2_subdev_core_ops ov9640_core_ops = {
> + .g_ctrl = ov9640_g_ctrl,
> + .s_ctrl = ov9640_s_ctrl,
> + .g_chip_ident = ov9640_g_chip_ident,
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + .g_register = ov9640_get_register,
> + .s_register = ov9640_set_register,
> +#endif
> +
> +};
> +
> +static struct v4l2_subdev_video_ops ov9640_video_ops = {
> + .s_stream = ov9640_s_stream,
> + .s_fmt = ov9640_s_fmt,
> + .try_fmt = ov9640_try_fmt,
> + .cropcap = ov9640_cropcap,
> + .g_crop = ov9640_g_crop,
> +
> +};
> +
> +static struct v4l2_subdev_ops ov9640_subdev_ops = {
> + .core = &ov9640_core_ops,
> + .video = &ov9640_video_ops,
> +};
> +
> +/*
> + * i2c_driver function
> + */
> +static int ov9640_probe(struct i2c_client *client,
> + const struct i2c_device_id *did)
> +{
> + struct ov9640_priv *priv;
> + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
> + 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;
> + }
> +
> + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
You're not using smbus calls, so, don't need this check. Or switch to
using them:-)
[no more comments below]
Thanks
Guennadi
> + dev_err(&adapter->dev,
> + "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
> + return -EIO;
> + }
> +
> + priv = kzalloc(sizeof(struct ov9640_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, &ov9640_subdev_ops);
> +
> + icd->ops = &ov9640_ops;
> +
> + ret = ov9640_video_probe(icd, client);
> +
> + if (ret) {
> + icd->ops = NULL;
> + i2c_set_clientdata(client, NULL);
> + kfree(priv);
> + }
> +
> + return ret;
> +}
> +
> +static int ov9640_remove(struct i2c_client *client)
> +{
> + struct ov9640_priv *priv = i2c_get_clientdata(client);
> +
> + i2c_set_clientdata(client, NULL);
> + kfree(priv);
> + return 0;
> +}
> +
> +static const struct i2c_device_id ov9640_id[] = {
> + { "ov9640", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, ov9640_id);
> +
> +static struct i2c_driver ov9640_i2c_driver = {
> + .driver = {
> + .name = "ov9640",
> + },
> + .probe = ov9640_probe,
> + .remove = ov9640_remove,
> + .id_table = ov9640_id,
> +};
> +
> +static int __init ov9640_module_init(void)
> +{
> + return i2c_add_driver(&ov9640_i2c_driver);
> +}
> +
> +static void __exit ov9640_module_exit(void)
> +{
> + i2c_del_driver(&ov9640_i2c_driver);
> +}
> +
> +module_init(ov9640_module_init);
> +module_exit(ov9640_module_exit);
> +
> +MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV96xx");
> +MODULE_AUTHOR("Marek Vasut <marek.vasut@xxxxxxxxx>");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/media/video/ov9640.h b/drivers/media/video/ov9640.h
> new file mode 100644
> index 0000000..6c39f1e
> --- /dev/null
> +++ b/drivers/media/video/ov9640.h
> @@ -0,0 +1,206 @@
> +/*
> + * OmniVision OV96xx Camera Header File
> + *
> + * Copyright (C) 2009 Marek Vasut <marek.vasut@xxxxxxxxx>
> + *
> + * 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 __DRIVERS_MEDIA_VIDEO_OV9640_H__
> +#define __DRIVERS_MEDIA_VIDEO_OV9640_H__
> +
> +/* Register definitions */
> +#define OV9640_GAIN 0x00
> +#define OV9640_BLUE 0x01
> +#define OV9640_RED 0x02
> +#define OV9640_VFER 0x03
> +#define OV9640_COM1 0x04
> +#define OV9640_BAVE 0x05
> +#define OV9640_GEAVE 0x06
> +#define OV9640_RSID 0x07
> +#define OV9640_RAVE 0x08
> +#define OV9640_COM2 0x09
> +#define OV9640_PID 0x0a
> +#define OV9640_VER 0x0b
> +#define OV9640_COM3 0x0c
> +#define OV9640_COM4 0x0d
> +#define OV9640_COM5 0x0e
> +#define OV9640_COM6 0x0f
> +#define OV9640_AECH 0x10
> +#define OV9640_CLKRC 0x11
> +#define OV9640_COM7 0x12
> +#define OV9640_COM8 0x13
> +#define OV9640_COM9 0x14
> +#define OV9640_COM10 0x15
> +/* 0x16 - RESERVED */
> +#define OV9640_HSTART 0x17
> +#define OV9640_HSTOP 0x18
> +#define OV9640_VSTART 0x19
> +#define OV9640_VSTOP 0x1a
> +#define OV9640_PSHFT 0x1b
> +#define OV9640_MIDH 0x1c
> +#define OV9640_MIDL 0x1d
> +#define OV9640_MVFP 0x1e
> +#define OV9640_LAEC 0x1f
> +#define OV9640_BOS 0x20
> +#define OV9640_GBOS 0x21
> +#define OV9640_GROS 0x22
> +#define OV9640_ROS 0x23
> +#define OV9640_AEW 0x24
> +#define OV9640_AEB 0x25
> +#define OV9640_VPT 0x26
> +#define OV9640_BBIAS 0x27
> +#define OV9640_GBBIAS 0x28
> +/* 0x29 - RESERVED */
> +#define OV9640_EXHCH 0x2a
> +#define OV9640_EXHCL 0x2b
> +#define OV9640_RBIAS 0x2c
> +#define OV9640_ADVFL 0x2d
> +#define OV9640_ADVFH 0x2e
> +#define OV9640_YAVE 0x2f
> +#define OV9640_HSYST 0x30
> +#define OV9640_HSYEN 0x31
> +#define OV9640_HREF 0x32
> +#define OV9640_CHLF 0x33
> +#define OV9640_ARBLM 0x34
> +/* 0x35..0x36 - RESERVED */
> +#define OV9640_ADC 0x37
> +#define OV9640_ACOM 0x38
> +#define OV9640_OFON 0x39
> +#define OV9640_TSLB 0x3a
> +#define OV9640_COM11 0x3b
> +#define OV9640_COM12 0x3c
> +#define OV9640_COM13 0x3d
> +#define OV9640_COM14 0x3e
> +#define OV9640_EDGE 0x3f
> +#define OV9640_COM15 0x40
> +#define OV9640_COM16 0x41
> +#define OV9640_COM17 0x42
> +/* 0x43..0x4e - RESERVED */
> +#define OV9640_MTX1 0x4f
> +#define OV9640_MTX2 0x50
> +#define OV9640_MTX3 0x51
> +#define OV9640_MTX4 0x52
> +#define OV9640_MTX5 0x53
> +#define OV9640_MTX6 0x54
> +#define OV9640_MTX7 0x55
> +#define OV9640_MTX8 0x56
> +#define OV9640_MTX9 0x57
> +#define OV9640_MTXS 0x58
> +/* 0x59..0x61 - RESERVED */
> +#define OV9640_LCC1 0x62
> +#define OV9640_LCC2 0x63
> +#define OV9640_LCC3 0x64
> +#define OV9640_LCC4 0x65
> +#define OV9640_LCC5 0x66
> +#define OV9640_MANU 0x67
> +#define OV9640_MANV 0x68
> +#define OV9640_HV 0x69
> +#define OV9640_MBD 0x6a
> +#define OV9640_DBLV 0x6b
> +#define OV9640_GSP 0x6c /* ... till 0x7b */
> +#define OV9640_GST 0x7c /* ... till 0x8a */
> +
> +#define OV9640_CLKRC_DPLL_EN 0x80
> +#define OV9640_CLKRC_DIRECT 0x40
> +#define OV9640_CLKRC_DIV(x) ((x) & 0x3f)
> +
> +#define OV9640_PSHFT_VAL(x) ((x) & 0xff)
> +
> +#define OV9640_ACOM_2X_ANALOG 0x80
> +#define OV9640_ACOM_RSVD 0x12
> +
> +#define OV9640_MVFP_V 0x10
> +#define OV9640_MVFP_H 0x20
> +
> +#define OV9640_COM1_HREF_NOSKIP 0x00
> +#define OV9640_COM1_HREF_2SKIP 0x04
> +#define OV9640_COM1_HREF_3SKIP 0x08
> +#define OV9640_COM1_QQFMT 0x20
> +
> +#define OV9640_COM2_SSM 0x10
> +
> +#define OV9640_COM3_VP 0x04
> +
> +#define OV9640_COM4_QQ_VP 0x80
> +#define OV9640_COM4_RSVD 0x40
> +
> +#define OV9640_COM5_SYSCLK 0x80
> +#define OV9640_COM5_LONGEXP 0x01
> +
> +#define OV9640_COM6_OPT_BLC 0x40
> +#define OV9640_COM6_ADBLC_BIAS 0x08
> +#define OV9640_COM6_FMT_RST 0x82
> +#define OV9640_COM6_ADBLC_OPTEN 0x01
> +
> +#define OV9640_COM7_RAW_RGB 0x01
> +#define OV9640_COM7_RGB 0x04
> +#define OV9640_COM7_QCIF 0x08
> +#define OV9640_COM7_QVGA 0x10
> +#define OV9640_COM7_CIF 0x20
> +#define OV9640_COM7_VGA 0x40
> +#define OV9640_COM7_SCCB_RESET 0x80
> +
> +#define OV9640_COM12_YUV_AVG 0x04
> +#define OV9640_COM12_RSVD 0x40
> +
> +#define OV9640_COM13_GAMMA_NONE 0x00
> +#define OV9640_COM13_GAMMA_Y 0x40
> +#define OV9640_COM13_GAMMA_RAW 0x80
> +#define OV9640_COM13_RGB_AVG 0x20
> +#define OV9640_COM13_MATRIX_EN 0x10
> +#define OV9640_COM13_Y_DELAY_EN 0x08
> +#define OV9640_COM13_YUV_DLY(x) ((x) & 0x07)
> +
> +#define OV9640_COM15_OR_00FF 0x00
> +#define OV9640_COM15_OR_01FE 0x40
> +#define OV9640_COM15_OR_10F0 0xc0
> +#define OV9640_COM15_RGB_NORM 0x00
> +#define OV9640_COM15_RGB_565 0x10
> +#define OV9640_COM15_RGB_555 0x30
> +
> +#define OV9640_COM16_RB_AVG 0x01
> +
> +/* IDs */
> +#define OV9640_V2 0x9648
> +#define OV9640_V3 0x9649
> +#define VERSION(pid, ver) (((pid) << 8) | ((ver) & 0xFF))
> +
> +/* supported resolutions */
> +enum {
> + W_QQCIF = 88,
> + W_QQVGA = 160,
> + W_QCIF = 176,
> + W_QVGA = 320,
> + W_CIF = 352,
> + W_VGA = 640,
> + W_SXGA = 1280
> +};
> +#define H_SXGA 960
> +
> +/* Misc. structures */
> +struct ov9640_reg_alt {
> + u8 com7;
> + u8 com12;
> + u8 com13;
> + u8 com15;
> +};
> +
> +struct ov9640_reg {
> + u8 reg;
> + u8 val;
> +};
> +
> +struct ov9640_priv {
> + struct v4l2_subdev subdev;
> +
> + int model;
> + int revision;
> +
> + bool flag_vflip;
> + bool flag_hflip;
> +};
> +
> +#endif /* __DRIVERS_MEDIA_VIDEO_OV9640_H__ */
> diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h
> index 11a4a2d..0892e52 100644
> --- a/include/media/v4l2-chip-ident.h
> +++ b/include/media/v4l2-chip-ident.h
> @@ -60,6 +60,7 @@ enum {
> V4L2_IDENT_OV7670 = 250,
> V4L2_IDENT_OV7720 = 251,
> V4L2_IDENT_OV7725 = 252,
> + V4L2_IDENT_OV9640 = 253,
>
> /* module saa7146: reserved range 300-309 */
> V4L2_IDENT_SAA7146 = 300,
> --
> 1.6.3.3
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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