Re: [PATCH v3 05/10] v4l: Add support for ov5640 sensor
Hi Jean-Philippe,
On Mon, May 7, 2012 at 2:27 AM, jean-philippe francois
<jp.francois@xxxxxxxxxx> wrote:
> 2012/5/2 Sergio Aguirre <saaguirre@xxxxxx>:
>> This adds a very limited driver for ov5640, which
>> only supports:
>> - 2592x1944 @ ~7.5 fps
>> - 1920x1080 @ ~15 fps,
>> - 1280x720 @ ~24 fps,
>> - 640x480 @ ~24 fps,
>> - 320x240 @ ~24 fps,
>>
>> All in YUV422i format, using 1 CSI2 datalane @ 333 MHz.
>>
>
> There is already a limited driver in mainline for ov5642.
> How does the 5642 differ from 5640 ?
Well, it has several differences, see:
- OV5640 product brief:
http://www.ovt.com/download_document.php?type=sensor&sensorid=93
- OV5642 product brief:
http://www.ovt.com/download_document.php?type=sensor&sensorid=65
Some of the most notable differences are:
- OV5642 has a MIPI input, for using OV ISP with an external sensor.
- OV5640 has JPEG compression, OV5642 apparently not...
- OV5640 supports anti-shake, OV5640 apparently not...
> Can a single driver handle both chip ?
Maybe, yeah..
Now, for the OV5640 differences above, I'm not enabling much nice
features so far,
so it might be worth a try to attempt the ov5642 driver on my OV5640
as-is, to see
if we can expand it to support both.
I'll also see if I can reach people at OmniVision to consult
feasibility of register settings
sharing.
Regards,
Sergio
>
>
>> Signed-off-by: Sergio Aguirre <saaguirre@xxxxxx>
>> ---
>> drivers/media/video/Kconfig | 6 +
>> drivers/media/video/Makefile | 1 +
>> drivers/media/video/ov5640.c | 948 ++++++++++++++++++++++++++++++++++++++++++
>> include/media/ov5640.h | 10 +
>> 4 files changed, 965 insertions(+), 0 deletions(-)
>> create mode 100644 drivers/media/video/ov5640.c
>> create mode 100644 include/media/ov5640.h
>>
>> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
>> index 4482ac4..cc76652 100644
>> --- a/drivers/media/video/Kconfig
>> +++ b/drivers/media/video/Kconfig
>> @@ -480,6 +480,12 @@ config VIDEO_OV7670
>> OV7670 VGA camera. It currently only works with the M88ALP01
>> controller.
>>
>> +config VIDEO_OV5640
>> + tristate "OmniVision OV5640 sensor support"
>> + depends on I2C && VIDEO_V4L2
>> + help
>> + This is a ov5640 camera driver
>> +
>> config VIDEO_VS6624
>> tristate "ST VS6624 sensor support"
>> depends on VIDEO_V4L2 && I2C
>> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
>> index c95cc0d..da40ab3 100644
>> --- a/drivers/media/video/Makefile
>> +++ b/drivers/media/video/Makefile
>> @@ -68,6 +68,7 @@ obj-$(CONFIG_VIDEO_CX25840) += cx25840/
>> obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o
>> obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
>> obj-$(CONFIG_VIDEO_OV7670) += ov7670.o
>> +obj-$(CONFIG_VIDEO_OV5640) += ov5640.o
>> obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o
>> obj-$(CONFIG_VIDEO_TVEEPROM) += tveeprom.o
>> obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o
>> diff --git a/drivers/media/video/ov5640.c b/drivers/media/video/ov5640.c
>> new file mode 100644
>> index 0000000..2a64d50
>> --- /dev/null
>> +++ b/drivers/media/video/ov5640.c
>> @@ -0,0 +1,948 @@
>> +/*
>> + * OmniVision OV5640 sensor driver
>> + *
>> + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + */
>> +
>> +#include <linux/videodev2.h>
>> +#include <linux/slab.h>
>> +#include <linux/i2c.h>
>> +#include <linux/log2.h>
>> +#include <linux/delay.h>
>> +#include <linux/module.h>
>> +
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-subdev.h>
>> +#include <media/v4l2-ctrls.h>
>> +
>> +#include <media/ov5640.h>
>> +
>> +/* OV5640 has only one fixed colorspace per pixelcode */
>> +struct ov5640_datafmt {
>> + enum v4l2_mbus_pixelcode code;
>> + enum v4l2_colorspace colorspace;
>> +};
>> +
>> +struct ov5640_timing_cfg {
>> + u16 x_addr_start;
>> + u16 y_addr_start;
>> + u16 x_addr_end;
>> + u16 y_addr_end;
>> + u16 h_output_size;
>> + u16 v_output_size;
>> + u16 h_total_size;
>> + u16 v_total_size;
>> + u16 isp_h_offset;
>> + u16 isp_v_offset;
>> + u8 h_odd_ss_inc;
>> + u8 h_even_ss_inc;
>> + u8 v_odd_ss_inc;
>> + u8 v_even_ss_inc;
>> +};
>> +
>> +enum ov5640_size {
>> + OV5640_SIZE_QVGA,
>> + OV5640_SIZE_VGA,
>> + OV5640_SIZE_720P,
>> + OV5640_SIZE_1080P,
>> + OV5640_SIZE_5MP,
>> + OV5640_SIZE_LAST,
>> +};
>> +
>> +static const struct v4l2_frmsize_discrete ov5640_frmsizes[OV5640_SIZE_LAST] = {
>> + { 320, 240 },
>> + { 640, 480 },
>> + { 1280, 720 },
>> + { 1920, 1080 },
>> + { 2592, 1944 },
>> +};
>> +
>> +/* Find a frame size in an array */
>> +static int ov5640_find_framesize(u32 width, u32 height)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < OV5640_SIZE_LAST; i++) {
>> + if ((ov5640_frmsizes[i].width >= width) &&
>> + (ov5640_frmsizes[i].height >= height))
>> + break;
>> + }
>> +
>> + /* If not found, select biggest */
>> + if (i >= OV5640_SIZE_LAST)
>> + i = OV5640_SIZE_LAST - 1;
>> +
>> + return i;
>> +}
>> +
>> +struct ov5640 {
>> + struct v4l2_subdev subdev;
>> + struct media_pad pad;
>> + struct v4l2_mbus_framefmt format;
>> +
>> + struct v4l2_ctrl_handler ctrl_handler;
>> +
>> + const struct ov5640_platform_data *pdata;
>> +
>> + struct v4l2_ctrl *pixel_rate;
>> +};
>> +
>> +static inline struct ov5640 *to_ov5640(struct v4l2_subdev *sd)
>> +{
>> + return container_of(sd, struct ov5640, subdev);
>> +}
>> +
>> +/**
>> + * struct ov5640_reg - ov5640 register format
>> + * @reg: 16-bit offset to register
>> + * @val: 8/16/32-bit register value
>> + * @length: length of the register
>> + *
>> + * Define a structure for OV5640 register initialization values
>> + */
>> +struct ov5640_reg {
>> + u16 reg;
>> + u8 val;
>> +};
>> +
>> +/* TODO: Divide this properly */
>> +static const struct ov5640_reg configscript_common1[] = {
>> + { 0x3103, 0x03 },
>> + { 0x3017, 0x00 },
>> + { 0x3018, 0x00 },
>> + { 0x3630, 0x2e },
>> + { 0x3632, 0xe2 },
>> + { 0x3633, 0x23 },
>> + { 0x3634, 0x44 },
>> + { 0x3621, 0xe0 },
>> + { 0x3704, 0xa0 },
>> + { 0x3703, 0x5a },
>> + { 0x3715, 0x78 },
>> + { 0x3717, 0x01 },
>> + { 0x370b, 0x60 },
>> + { 0x3705, 0x1a },
>> + { 0x3905, 0x02 },
>> + { 0x3906, 0x10 },
>> + { 0x3901, 0x0a },
>> + { 0x3731, 0x12 },
>> + { 0x3600, 0x04 },
>> + { 0x3601, 0x22 },
>> + { 0x471c, 0x50 },
>> + { 0x3002, 0x1c },
>> + { 0x3006, 0xc3 },
>> + { 0x300e, 0x05 },
>> + { 0x302e, 0x08 },
>> + { 0x3612, 0x4b },
>> + { 0x3618, 0x04 },
>> + { 0x3034, 0x18 },
>> + { 0x3035, 0x11 },
>> + { 0x3036, 0x54 },
>> + { 0x3037, 0x13 },
>> + { 0x3708, 0x21 },
>> + { 0x3709, 0x12 },
>> + { 0x370c, 0x00 },
>> +};
>> +
>> +/* TODO: Divide this properly */
>> +static const struct ov5640_reg configscript_common2[] = {
>> + { 0x3a02, 0x01 },
>> + { 0x3a03, 0xec },
>> + { 0x3a08, 0x01 },
>> + { 0x3a09, 0x27 },
>> + { 0x3a0a, 0x00 },
>> + { 0x3a0b, 0xf6 },
>> + { 0x3a0e, 0x06 },
>> + { 0x3a0d, 0x08 },
>> + { 0x3a14, 0x01 },
>> + { 0x3a15, 0xec },
>> + { 0x4001, 0x02 },
>> + { 0x4004, 0x06 },
>> + { 0x460b, 0x37 },
>> + { 0x4750, 0x00 },
>> + { 0x4751, 0x00 },
>> + { 0x4800, 0x24 },
>> + { 0x5a00, 0x08 },
>> + { 0x5a21, 0x00 },
>> + { 0x5a24, 0x00 },
>> + { 0x5000, 0x27 },
>> + { 0x5001, 0x87 },
>> + { 0x3820, 0x40 },
>> + { 0x3821, 0x06 },
>> + { 0x3824, 0x01 },
>> + { 0x5481, 0x08 },
>> + { 0x5482, 0x14 },
>> + { 0x5483, 0x28 },
>> + { 0x5484, 0x51 },
>> + { 0x5485, 0x65 },
>> + { 0x5486, 0x71 },
>> + { 0x5487, 0x7d },
>> + { 0x5488, 0x87 },
>> + { 0x5489, 0x91 },
>> + { 0x548a, 0x9a },
>> + { 0x548b, 0xaa },
>> + { 0x548c, 0xb8 },
>> + { 0x548d, 0xcd },
>> + { 0x548e, 0xdd },
>> + { 0x548f, 0xea },
>> + { 0x5490, 0x1d },
>> + { 0x5381, 0x20 },
>> + { 0x5382, 0x64 },
>> + { 0x5383, 0x08 },
>> + { 0x5384, 0x20 },
>> + { 0x5385, 0x80 },
>> + { 0x5386, 0xa0 },
>> + { 0x5387, 0xa2 },
>> + { 0x5388, 0xa0 },
>> + { 0x5389, 0x02 },
>> + { 0x538a, 0x01 },
>> + { 0x538b, 0x98 },
>> + { 0x5300, 0x08 },
>> + { 0x5301, 0x30 },
>> + { 0x5302, 0x10 },
>> + { 0x5303, 0x00 },
>> + { 0x5304, 0x08 },
>> + { 0x5305, 0x30 },
>> + { 0x5306, 0x08 },
>> + { 0x5307, 0x16 },
>> + { 0x5580, 0x00 },
>> + { 0x5587, 0x00 },
>> + { 0x5588, 0x00 },
>> + { 0x5583, 0x40 },
>> + { 0x5584, 0x10 },
>> + { 0x5589, 0x10 },
>> + { 0x558a, 0x00 },
>> + { 0x558b, 0xf8 },
>> + { 0x3a0f, 0x36 },
>> + { 0x3a10, 0x2e },
>> + { 0x3a1b, 0x38 },
>> + { 0x3a1e, 0x2c },
>> + { 0x3a11, 0x70 },
>> + { 0x3a1f, 0x18 },
>> + { 0x3a18, 0x00 },
>> + { 0x3a19, 0xf8 },
>> + { 0x3003, 0x03 },
>> + { 0x3003, 0x01 },
>> +};
>> +
>> +static const struct ov5640_timing_cfg timing_cfg[OV5640_SIZE_LAST] = {
>> + [OV5640_SIZE_QVGA] = {
>> + .x_addr_start = 0,
>> + .y_addr_start = 0,
>> + .x_addr_end = 2623,
>> + .y_addr_end = 1951,
>> + .h_output_size = 320,
>> + .v_output_size = 240,
>> + .h_total_size = 2844,
>> + .v_total_size = 1968,
>> + .isp_h_offset = 16,
>> + .isp_v_offset = 6,
>> + .h_odd_ss_inc = 1,
>> + .h_even_ss_inc = 1,
>> + .v_odd_ss_inc = 1,
>> + .v_even_ss_inc = 1,
>> + },
>> + [OV5640_SIZE_VGA] = {
>> + .x_addr_start = 0,
>> + .y_addr_start = 0,
>> + .x_addr_end = 2623,
>> + .y_addr_end = 1951,
>> + .h_output_size = 640,
>> + .v_output_size = 480,
>> + .h_total_size = 2844,
>> + .v_total_size = 1968,
>> + .isp_h_offset = 16,
>> + .isp_v_offset = 6,
>> + .h_odd_ss_inc = 1,
>> + .h_even_ss_inc = 1,
>> + .v_odd_ss_inc = 1,
>> + .v_even_ss_inc = 1,
>> + },
>> + [OV5640_SIZE_720P] = {
>> + .x_addr_start = 336,
>> + .y_addr_start = 434,
>> + .x_addr_end = 2287,
>> + .y_addr_end = 1522,
>> + .h_output_size = 1280,
>> + .v_output_size = 720,
>> + .h_total_size = 2500,
>> + .v_total_size = 1120,
>> + .isp_h_offset = 16,
>> + .isp_v_offset = 4,
>> + .h_odd_ss_inc = 1,
>> + .h_even_ss_inc = 1,
>> + .v_odd_ss_inc = 1,
>> + .v_even_ss_inc = 1,
>> + },
>> + [OV5640_SIZE_1080P] = {
>> + .x_addr_start = 336,
>> + .y_addr_start = 434,
>> + .x_addr_end = 2287,
>> + .y_addr_end = 1522,
>> + .h_output_size = 1920,
>> + .v_output_size = 1080,
>> + .h_total_size = 2500,
>> + .v_total_size = 1120,
>> + .isp_h_offset = 16,
>> + .isp_v_offset = 4,
>> + .h_odd_ss_inc = 1,
>> + .h_even_ss_inc = 1,
>> + .v_odd_ss_inc = 1,
>> + .v_even_ss_inc = 1,
>> + },
>> + [OV5640_SIZE_5MP] = {
>> + .x_addr_start = 0,
>> + .y_addr_start = 0,
>> + .x_addr_end = 2623,
>> + .y_addr_end = 1951,
>> + .h_output_size = 2592,
>> + .v_output_size = 1944,
>> + .h_total_size = 2844,
>> + .v_total_size = 1968,
>> + .isp_h_offset = 16,
>> + .isp_v_offset = 6,
>> + .h_odd_ss_inc = 1,
>> + .h_even_ss_inc = 1,
>> + .v_odd_ss_inc = 1,
>> + .v_even_ss_inc = 1,
>> + },
>> +};
>> +
>> +/**
>> + * ov5640_reg_read - Read a value from a register in an ov5640 sensor device
>> + * @client: i2c driver client structure
>> + * @reg: register address / offset
>> + * @val: stores the value that gets read
>> + *
>> + * Read a value from a register in an ov5640 sensor device.
>> + * The value is returned in 'val'.
>> + * Returns zero if successful, or non-zero otherwise.
>> + */
>> +static int ov5640_reg_read(struct i2c_client *client, u16 reg, u8 *val)
>> +{
>> + int ret;
>> + u8 data[2] = {0};
>> + struct i2c_msg msg = {
>> + .addr = client->addr,
>> + .flags = 0,
>> + .len = 2,
>> + .buf = data,
>> + };
>> +
>> + data[0] = (u8)(reg >> 8);
>> + data[1] = (u8)(reg & 0xff);
>> +
>> + ret = i2c_transfer(client->adapter, &msg, 1);
>> + if (ret < 0)
>> + goto err;
>> +
>> + msg.flags = I2C_M_RD;
>> + msg.len = 1;
>> + ret = i2c_transfer(client->adapter, &msg, 1);
>> + if (ret < 0)
>> + goto err;
>> +
>> + *val = data[0];
>> + return 0;
>> +
>> +err:
>> + dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
>> + return ret;
>> +}
>> +
>> +/**
>> + * Write a value to a register in ov5640 sensor device.
>> + * @client: i2c driver client structure.
>> + * @reg: Address of the register to read value from.
>> + * @val: Value to be written to a specific register.
>> + * Returns zero if successful, or non-zero otherwise.
>> + */
>> +static int ov5640_reg_write(struct i2c_client *client, u16 reg, u8 val)
>> +{
>> + int ret;
>> + unsigned char data[3] = { (u8)(reg >> 8), (u8)(reg & 0xff), val };
>> + struct i2c_msg msg = {
>> + .addr = client->addr,
>> + .flags = 0,
>> + .len = 3,
>> + .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;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * Initialize a list of ov5640 registers.
>> + * The list of registers is terminated by the pair of values
>> + * @client: i2c driver client structure.
>> + * @reglist[]: List of address of the registers to write data.
>> + * Returns zero if successful, or non-zero otherwise.
>> + */
>> +static int ov5640_reg_writes(struct i2c_client *client,
>> + const struct ov5640_reg reglist[],
>> + int size)
>> +{
>> + int err = 0, i;
>> +
>> + for (i = 0; i < size; i++) {
>> + err = ov5640_reg_write(client, reglist[i].reg,
>> + reglist[i].val);
>> + if (err)
>> + return err;
>> + }
>> + return 0;
>> +}
>> +
>> +static int ov5640_reg_set(struct i2c_client *client, u16 reg, u8 val)
>> +{
>> + int ret;
>> + u8 tmpval = 0;
>> +
>> + ret = ov5640_reg_read(client, reg, &tmpval);
>> + if (ret)
>> + return ret;
>> +
>> + return ov5640_reg_write(client, reg, tmpval | val);
>> +}
>> +
>> +static int ov5640_reg_clr(struct i2c_client *client, u16 reg, u8 val)
>> +{
>> + int ret;
>> + u8 tmpval = 0;
>> +
>> + ret = ov5640_reg_read(client, reg, &tmpval);
>> + if (ret)
>> + return ret;
>> +
>> + return ov5640_reg_write(client, reg, tmpval & ~val);
>> +}
>> +
>> +static int ov5640_config_timing(struct v4l2_subdev *sd)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + struct ov5640 *ov5640 = to_ov5640(sd);
>> + int ret, i;
>> +
>> + i = ov5640_find_framesize(ov5640->format.width, ov5640->format.height);
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3800,
>> + (timing_cfg[i].x_addr_start & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3801,
>> + timing_cfg[i].x_addr_start & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3802,
>> + (timing_cfg[i].y_addr_start & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3803,
>> + timing_cfg[i].y_addr_start & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3804,
>> + (timing_cfg[i].x_addr_end & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3805,
>> + timing_cfg[i].x_addr_end & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3806,
>> + (timing_cfg[i].y_addr_end & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3807,
>> + timing_cfg[i].y_addr_end & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3808,
>> + (timing_cfg[i].h_output_size & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3809,
>> + timing_cfg[i].h_output_size & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x380A,
>> + (timing_cfg[i].v_output_size & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x380B,
>> + timing_cfg[i].v_output_size & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x380C,
>> + (timing_cfg[i].h_total_size & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x380D,
>> + timing_cfg[i].h_total_size & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x380E,
>> + (timing_cfg[i].v_total_size & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x380F,
>> + timing_cfg[i].v_total_size & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3810,
>> + (timing_cfg[i].isp_h_offset & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3811,
>> + timing_cfg[i].isp_h_offset & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3812,
>> + (timing_cfg[i].isp_v_offset & 0xFF00) >> 8);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3813,
>> + timing_cfg[i].isp_v_offset & 0xFF);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3814,
>> + ((timing_cfg[i].h_odd_ss_inc & 0xF) << 4) |
>> + (timing_cfg[i].h_even_ss_inc & 0xF));
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client,
>> + 0x3815,
>> + ((timing_cfg[i].v_odd_ss_inc & 0xF) << 4) |
>> + (timing_cfg[i].v_even_ss_inc & 0xF));
>> +
>> + return ret;
>> +}
>> +
>> +static struct v4l2_mbus_framefmt *
>> +__ov5640_get_pad_format(struct ov5640 *ov5640, struct v4l2_subdev_fh *fh,
>> + unsigned int pad, enum v4l2_subdev_format_whence which)
>> +{
>> + switch (which) {
>> + case V4L2_SUBDEV_FORMAT_TRY:
>> + return v4l2_subdev_get_try_format(fh, pad);
>> + case V4L2_SUBDEV_FORMAT_ACTIVE:
>> + return &ov5640->format;
>> + default:
>> + return NULL;
>> + }
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * V4L2 subdev internal operations
>> + */
>> +
>> +static int ov5640_s_power(struct v4l2_subdev *sd, int on)
>> +{
>> + struct ov5640 *ov5640 = to_ov5640(sd);
>> +
>> + return ov5640->pdata->s_power(sd, on);
>> +}
>> +
>> +static struct v4l2_subdev_core_ops ov5640_subdev_core_ops = {
>> + .s_power = ov5640_s_power,
>> +};
>> +
>> +static int ov5640_g_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct ov5640 *ov5640 = to_ov5640(sd);
>> +
>> + format->format = *__ov5640_get_pad_format(ov5640, fh, format->pad,
>> + format->which);
>> +
>> + return 0;
>> +}
>> +
>> +static int ov5640_s_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct ov5640 *ov5640 = to_ov5640(sd);
>> + struct v4l2_mbus_framefmt *__format;
>> +
>> + __format = __ov5640_get_pad_format(ov5640, fh, format->pad,
>> + format->which);
>> +
>> + *__format = format->format;
>> +
>> + /* NOTE: This is always true for now, revisit later. */
>> + ov5640->pixel_rate->cur.val64 = 42000000;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov5640_enum_fmt(struct v4l2_subdev *subdev,
>> + struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + if (code->index >= 2)
>> + return -EINVAL;
>> +
>> + switch (code->index) {
>> + case 0:
>> + code->code = V4L2_MBUS_FMT_UYVY8_1X16;
>> + break;
>> + case 1:
>> + code->code = V4L2_MBUS_FMT_YUYV8_1X16;
>> + break;
>> + }
>> + return 0;
>> +}
>> +
>> +static int ov5640_enum_framesizes(struct v4l2_subdev *subdev,
>> + struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_frame_size_enum *fse)
>> +{
>> + if ((fse->index >= OV5640_SIZE_LAST) ||
>> + (fse->code != V4L2_MBUS_FMT_UYVY8_1X16 &&
>> + fse->code != V4L2_MBUS_FMT_YUYV8_1X16))
>> + return -EINVAL;
>> +
>> + fse->min_width = ov5640_frmsizes[fse->index].width;
>> + fse->max_width = fse->min_width;
>> + fse->min_height = ov5640_frmsizes[fse->index].height;
>> + fse->max_height = fse->min_height;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
>> +{
>> + struct ov5640 *ov5640 = to_ov5640(sd);
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + int ret = 0;
>> +
>> + if (enable) {
>> + u8 fmtreg = 0, fmtmuxreg = 0;
>> + int i;
>> +
>> + switch ((u32)ov5640->format.code) {
>> + case V4L2_MBUS_FMT_UYVY8_1X16:
>> + fmtreg = 0x32;
>> + fmtmuxreg = 0;
>> + break;
>> + case V4L2_MBUS_FMT_YUYV8_1X16:
>> + fmtreg = 0x30;
>> + fmtmuxreg = 0;
>> + break;
>> + default:
>> + /* This shouldn't happen */
>> + ret = -EINVAL;
>> + return ret;
>> + }
>> +
>> + ret = ov5640_reg_write(client, 0x4300, fmtreg);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_reg_write(client, 0x501F, fmtmuxreg);
>> + if (ret)
>> + return ret;
>> +
>> + ret = ov5640_config_timing(sd);
>> + if (ret)
>> + return ret;
>> +
>> + i = ov5640_find_framesize(ov5640->format.width, ov5640->format.height);
>> + if ((i == OV5640_SIZE_QVGA) ||
>> + (i == OV5640_SIZE_VGA) ||
>> + (i == OV5640_SIZE_720P)) {
>> + ret = ov5640_reg_write(client, 0x3108,
>> + (i == OV5640_SIZE_720P) ? 0x1 : 0);
>> + if (ret)
>> + return ret;
>> + ret = ov5640_reg_set(client, 0x5001, 0x20);
>> + } else {
>> + ret = ov5640_reg_clr(client, 0x5001, 0x20);
>> + if (ret)
>> + return ret;
>> + ret = ov5640_reg_write(client, 0x3108, 0x2);
>> + }
>> +
>> + ret = ov5640_reg_clr(client, 0x3008, 0x40);
>> + if (ret)
>> + goto out;
>> + } else {
>> + u8 tmpreg = 0;
>> +
>> + ret = ov5640_reg_read(client, 0x3008, &tmpreg);
>> + if (ret)
>> + goto out;
>> +
>> + ret = ov5640_reg_write(client, 0x3008, tmpreg | 0x40);
>> + if (ret)
>> + goto out;
>> + }
>> +
>> +out:
>> + return ret;
>> +}
>> +
>> +static struct v4l2_subdev_video_ops ov5640_subdev_video_ops = {
>> + .s_stream = ov5640_s_stream,
>> +};
>> +
>> +static struct v4l2_subdev_pad_ops ov5640_subdev_pad_ops = {
>> + .enum_mbus_code = ov5640_enum_fmt,
>> + .enum_frame_size = ov5640_enum_framesizes,
>> + .get_fmt = ov5640_g_fmt,
>> + .set_fmt = ov5640_s_fmt,
>> +};
>> +
>> +static int ov5640_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
>> +{
>> + /* Quantity of initial bad frames to skip. Revisit. */
>> + *frames = 3;
>> +
>> + return 0;
>> +}
>> +
>> +static struct v4l2_subdev_sensor_ops ov5640_subdev_sensor_ops = {
>> + .g_skip_frames = ov5640_g_skip_frames,
>> +};
>> +
>> +static struct v4l2_subdev_ops ov5640_subdev_ops = {
>> + .core = &ov5640_subdev_core_ops,
>> + .video = &ov5640_subdev_video_ops,
>> + .pad = &ov5640_subdev_pad_ops,
>> + .sensor = &ov5640_subdev_sensor_ops,
>> +};
>> +
>> +static int ov5640_registered(struct v4l2_subdev *subdev)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(subdev);
>> + struct ov5640 *ov5640 = to_ov5640(subdev);
>> + int ret = 0;
>> + u8 revision = 0;
>> +
>> + ret = ov5640_s_power(subdev, 1);
>> + if (ret < 0) {
>> + dev_err(&client->dev, "OV5640 power up failed\n");
>> + return ret;
>> + }
>> +
>> + ret = ov5640_reg_read(client, 0x302A, &revision);
>> + if (ret) {
>> + dev_err(&client->dev, "Failure to detect OV5640 chip\n");
>> + goto out;
>> + }
>> +
>> + revision &= 0xF;
>> +
>> + dev_info(&client->dev, "Detected a OV5640 chip, revision %x\n",
>> + revision);
>> +
>> + /* SW Reset */
>> + ret = ov5640_reg_set(client, 0x3008, 0x80);
>> + if (ret)
>> + goto out;
>> +
>> + msleep(2);
>> +
>> + ret = ov5640_reg_clr(client, 0x3008, 0x80);
>> + if (ret)
>> + goto out;
>> +
>> + /* SW Powerdown */
>> + ret = ov5640_reg_set(client, 0x3008, 0x40);
>> + if (ret)
>> + goto out;
>> +
>> + ret = ov5640_reg_writes(client, configscript_common1,
>> + ARRAY_SIZE(configscript_common1));
>> + if (ret)
>> + goto out;
>> +
>> + ret = ov5640_reg_writes(client, configscript_common2,
>> + ARRAY_SIZE(configscript_common2));
>> + if (ret)
>> + goto out;
>> +
>> + /* Init controls */
>> + ret = v4l2_ctrl_handler_init(&ov5640->ctrl_handler, 1);
>> + if (ret)
>> + goto out;
>> +
>> + ov5640->pixel_rate = v4l2_ctrl_new_std(
>> + &ov5640->ctrl_handler, NULL,
>> + V4L2_CID_PIXEL_RATE,
>> + 0, 0, 1, 0);
>> +
>> + subdev->ctrl_handler = &ov5640->ctrl_handler;
>> +out:
>> + ov5640_s_power(subdev, 0);
>> +
>> + return ret;
>> +}
>> +
>> +static int ov5640_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
>> +{
>> + struct v4l2_mbus_framefmt *format;
>> +
>> + format = v4l2_subdev_get_try_format(fh, 0);
>> + format->code = V4L2_MBUS_FMT_UYVY8_1X16;
>> + format->width = ov5640_frmsizes[OV5640_SIZE_VGA].width;
>> + format->height = ov5640_frmsizes[OV5640_SIZE_VGA].height;
>> + format->field = V4L2_FIELD_NONE;
>> + format->colorspace = V4L2_COLORSPACE_JPEG;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov5640_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
>> +{
>> + return 0;
>> +}
>> +
>> +static struct v4l2_subdev_internal_ops ov5640_subdev_internal_ops = {
>> + .registered = ov5640_registered,
>> + .open = ov5640_open,
>> + .close = ov5640_close,
>> +};
>> +
>> +static int ov5640_probe(struct i2c_client *client,
>> + const struct i2c_device_id *did)
>> +{
>> + struct ov5640 *ov5640;
>> + int ret;
>> +
>> + if (!client->dev.platform_data) {
>> + dev_err(&client->dev, "No platform data!!\n");
>> + return -ENODEV;
>> + }
>> +
>> + ov5640 = kzalloc(sizeof(*ov5640), GFP_KERNEL);
>> + if (!ov5640)
>> + return -ENOMEM;
>> +
>> + ov5640->pdata = client->dev.platform_data;
>> +
>> + ov5640->format.code = V4L2_MBUS_FMT_UYVY8_1X16;
>> + ov5640->format.width = ov5640_frmsizes[OV5640_SIZE_VGA].width;
>> + ov5640->format.height = ov5640_frmsizes[OV5640_SIZE_VGA].height;
>> + ov5640->format.field = V4L2_FIELD_NONE;
>> + ov5640->format.colorspace = V4L2_COLORSPACE_JPEG;
>> +
>> + v4l2_i2c_subdev_init(&ov5640->subdev, client, &ov5640_subdev_ops);
>> + ov5640->subdev.internal_ops = &ov5640_subdev_internal_ops;
>> + ov5640->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
>> + ov5640->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
>> +
>> + ov5640->pad.flags = MEDIA_PAD_FL_SOURCE;
>> + ret = media_entity_init(&ov5640->subdev.entity, 1, &ov5640->pad, 0);
>> + if (ret < 0)
>> + goto err_mediainit;
>> +
>> + return ret;
>> +
>> +err_mediainit:
>> + v4l2_device_unregister_subdev(&ov5640->subdev);
>> + kfree(ov5640);
>> + return ret;
>> +}
>> +
>> +static int ov5640_remove(struct i2c_client *client)
>> +{
>> + struct v4l2_subdev *subdev = i2c_get_clientdata(client);
>> + struct ov5640 *ov5640 = to_ov5640(subdev);
>> +
>> + v4l2_ctrl_handler_free(&ov5640->ctrl_handler);
>> + v4l2_device_unregister_subdev(subdev);
>> + media_entity_cleanup(&subdev->entity);
>> + kfree(ov5640);
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id ov5640_id[] = {
>> + { "ov5640", 0 },
>> + { }
>> +};
>> +MODULE_DEVICE_TABLE(i2c, ov5640_id);
>> +
>> +static struct i2c_driver ov5640_i2c_driver = {
>> + .driver = {
>> + .name = "ov5640",
>> + },
>> + .probe = ov5640_probe,
>> + .remove = ov5640_remove,
>> + .id_table = ov5640_id,
>> +};
>> +
>> +static int __init ov5640_mod_init(void)
>> +{
>> + return i2c_add_driver(&ov5640_i2c_driver);
>> +}
>> +
>> +static void __exit ov5640_mod_exit(void)
>> +{
>> + i2c_del_driver(&ov5640_i2c_driver);
>> +}
>> +
>> +module_init(ov5640_mod_init);
>> +module_exit(ov5640_mod_exit);
>> +
>> +MODULE_DESCRIPTION("OmniVision OV5640 Camera driver");
>> +MODULE_AUTHOR("Sergio Aguirre <saaguirre@xxxxxx>");
>> +MODULE_LICENSE("GPL v2");
>> diff --git a/include/media/ov5640.h b/include/media/ov5640.h
>> new file mode 100644
>> index 0000000..65625ce
>> --- /dev/null
>> +++ b/include/media/ov5640.h
>> @@ -0,0 +1,10 @@
>> +#ifndef _MEDIA_OV5640_H
>> +#define _MEDIA_OV5640_H
>> +
>> +#include <media/v4l2-subdev.h>
>> +
>> +struct ov5640_platform_data {
>> + int (*s_power)(struct v4l2_subdev *subdev, int on);
>> +};
>> +
>> +#endif
>> --
>> 1.7.5.4
>>
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