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Date: Tue, 24 Feb 2015 11:36:17 +0000
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Sakari Ailus <sakari.ailus@....fi>
Cc: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Mauro Carvalho Chehab <mchehab@....samsung.com>,
Hans Verkuil <hans.verkuil@...co.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
linux-media <linux-media@...r.kernel.org>
Subject: Re: [PATCH v2] media: i2c: add support for omnivision's ov2659 sensor
Hi Sakari,
Thanks for the review.
On Tue, Feb 24, 2015 at 11:09 AM, Sakari Ailus <sakari.ailus@....fi> wrote:
> Hi Prabhakar,
>
> Thanks for the patch!
>
> On Sat, Feb 21, 2015 at 03:22:47PM +0000, Lad Prabhakar wrote:
>> From: Benoit Parrot <bparrot@...com>
>>
>> this patch adds support for omnivision's ov2659
>> sensor, the driver supports following features:
>> 1: Asynchronous probing
>> 2: DT support
>> 3: Media controller support
>>
>> Signed-off-by: Benoit Parrot <bparrot@...com>
>> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
>> ---
>> Changes for v2:
>> 1: Dropped prefix entry for ovti as its already merged.
>> 2: Fixed review comments pointed by Laurent.
>>
>> .../devicetree/bindings/media/i2c/ov2659.txt | 41 +
>> MAINTAINERS | 10 +
>> drivers/media/i2c/Kconfig | 11 +
>> drivers/media/i2c/Makefile | 1 +
>> drivers/media/i2c/ov2659.c | 1513 ++++++++++++++++++++
>> include/media/ov2659.h | 33 +
>> 6 files changed, 1609 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/media/i2c/ov2659.txt
>> create mode 100644 drivers/media/i2c/ov2659.c
>> create mode 100644 include/media/ov2659.h
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/ov2659.txt b/Documentation/devicetree/bindings/media/i2c/ov2659.txt
>> new file mode 100644
>> index 0000000..c3f350b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/ov2659.txt
>> @@ -0,0 +1,41 @@
>> +* OV2659 1/5-Inch 2Mp SOC Camera
>> +
>> +The Omnivision OV2659 is a 1/5-inch SOC camera, with an active array size of
>> +1632H x 1212V. It is programmable through a SCCB. The OV2659 sensor supports
>> +multiple resolutions output, such as UXGA, SVGA, 720p. It also can support
>> +YUV422, RGB565/555 or raw RGB output formats.
>> +
>> +Required Properties:
>> +- compatible: Must be "ovti,ov2659"
>> +- reg: I2C slave address
>> +- clocks: reference to the xvclk input clock.
>> +- clock-names: should be "xvclk".
>> +- xvclk-frequency: Input clock frequency.
>
> This should be probably in the device's OF node, not in the endpoint node. I
> think you should document in which one each property is.
>
Yea agreed.
>> +
>> +For further reading on port node refer to
>> +Documentation/devicetree/bindings/media/video-interfaces.txt.
>> +
>> +Example:
>> +
>> + i2c0@...2000 {
>> + ...
>> + ...
>> + ov2659@30 {
>> + compatible = "ovti,ov2659";
>> + reg = <0x30>;
>> +
>> + clocks = <&clk_ov2659>;
>> + clock-names = "xvclk";
>> +
>> + assigned-clocks = <&clk_ov2659>;
>> + assigned-clock-rates = <12000000>;
>
> These don't quite match with the documentation above.
>
These are the standard clock properties, which I thought could be ignored
for documenting ?
>> +
>> + port {
>> + ov2659_0: endpoint {
>> + remote-endpoint = <&vpfe_ep>;
>> + xvclk-frequency = <12000000>;
>> + };
>> + };
>> + };
>> + ...
>> + };
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index becb274..1126c9e 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -8758,6 +8758,16 @@ T: git git://linuxtv.org/mhadli/v4l-dvb-davinci_devices.git
>> S: Maintained
>> F: drivers/media/platform/am437x/
>>
>> +OV2659 OMNIVISION SENSOR DRIVER
>> +M: Lad, Prabhakar <prabhakar.csengg@...il.com>
>> +L: linux-media@...r.kernel.org
>> +W: http://linuxtv.org/
>> +Q: http://patchwork.linuxtv.org/project/linux-media/list/
>> +T: git git://linuxtv.org/mhadli/v4l-dvb-davinci_devices.git
>> +S: Maintained
>> +F: drivers/media/i2c/ov2659.c
>> +F: include/media/ov2659.h
>> +
>> SIS 190 ETHERNET DRIVER
>> M: Francois Romieu <romieu@...zoreil.com>
>> L: netdev@...r.kernel.org
>> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
>> index da58c9b..6f30ea7 100644
>> --- a/drivers/media/i2c/Kconfig
>> +++ b/drivers/media/i2c/Kconfig
>> @@ -466,6 +466,17 @@ config VIDEO_APTINA_PLL
>> config VIDEO_SMIAPP_PLL
>> tristate
>>
>> +config VIDEO_OV2659
>> + tristate "OmniVision OV2659 sensor support"
>> + depends on VIDEO_V4L2 && I2C
>> + depends on MEDIA_CAMERA_SUPPORT
>> + ---help---
>> + This is a Video4Linux2 sensor-level driver for the OmniVision
>> + OV2659 camera.
>> +
>> + To compile this driver as a module, choose M here: the
>> + module will be called ov2659.
>> +
>> config VIDEO_OV7640
>> tristate "OmniVision OV7640 sensor support"
>> depends on I2C && VIDEO_V4L2
>> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
>> index 98589001..f165fae 100644
>> --- a/drivers/media/i2c/Makefile
>> +++ b/drivers/media/i2c/Makefile
>> @@ -77,3 +77,4 @@ obj-$(CONFIG_VIDEO_SMIAPP_PLL) += smiapp-pll.o
>> obj-$(CONFIG_VIDEO_AK881X) += ak881x.o
>> obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
>> obj-$(CONFIG_VIDEO_ML86V7667) += ml86v7667.o
>> +obj-$(CONFIG_VIDEO_OV2659) += ov2659.o
>> diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c
>> new file mode 100644
>> index 0000000..e79298b
>> --- /dev/null
>> +++ b/drivers/media/i2c/ov2659.c
>> @@ -0,0 +1,1513 @@
>> +/*
>> + * Omnivision OV2659 CMOS Image Sensor driver
>> + *
>> + * Copyright (C) 2015 Texas Instruments, Inc.
>> + *
>> + * Benoit Parrot <bparrot@...com>
>> + * Lad, Prabhakar <prabhakar.csengg@...il.com>
>> + *
>> + * This program is free software; you may redistribute it and/or modify
>> + * it under the terms of the GNU General Public License as published by
>> + * the Free Software Foundation; version 2 of the License.
>> + *
>> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
>> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
>> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
>> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
>> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
>> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
>> + * SOFTWARE.
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/err.h>
>> +#include <linux/init.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/io.h>
>> +#include <linux/i2c.h>
>> +#include <linux/kernel.h>
>> +#include <linux/media.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_graph.h>
>> +#include <linux/slab.h>
>> +#include <linux/uaccess.h>
>> +#include <linux/videodev2.h>
>> +
>> +#include <media/media-entity.h>
>> +#include <media/ov2659.h>
>> +#include <media/v4l2-common.h>
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-event.h>
>
> Your driver doesn't appear to support events. I propose to remove the
> remaining references to them.
>
OK
>> +#include <media/v4l2-image-sizes.h>
>> +#include <media/v4l2-mediabus.h>
>> +#include <media/v4l2-of.h>
>> +#include <media/v4l2-subdev.h>
>> +
>> +#define DRIVER_NAME "ov2659"
>> +
>> +/*
>> + * OV2659 register definitions
>> + */
>> +#define REG_SOFTWARE_STANDBY 0x0100
>> +#define REG_SOFTWARE_RESET 0x0103
>> +#define REG_IO_CTRL00 0x3000
>> +#define REG_IO_CTRL01 0x3001
>> +#define REG_IO_CTRL02 0x3002
>> +#define REG_OUTPUT_VALUE00 0x3008
>> +#define REG_OUTPUT_VALUE01 0x3009
>> +#define REG_OUTPUT_VALUE02 0x300d
>> +#define REG_OUTPUT_SELECT00 0x300e
>> +#define REG_OUTPUT_SELECT01 0x300f
>> +#define REG_OUTPUT_SELECT02 0x3010
>> +#define REG_OUTPUT_DRIVE 0x3011
>> +#define REG_INPUT_READOUT00 0x302d
>> +#define REG_INPUT_READOUT01 0x302e
>> +#define REG_INPUT_READOUT02 0x302f
>> +
>> +#define REG_SC_PLL_CTRL0 0x3003
>> +#define REG_SC_PLL_CTRL1 0x3004
>> +#define REG_SC_PLL_CTRL2 0x3005
>> +#define REG_SC_PLL_CTRL3 0x3006
>> +#define REG_SC_CHIP_ID_H 0x300a
>> +#define REG_SC_CHIP_ID_L 0x300b
>> +#define REG_SC_PWC 0x3014
>> +#define REG_SC_CLKRST0 0x301a
>> +#define REG_SC_CLKRST1 0x301b
>> +#define REG_SC_CLKRST2 0x301c
>> +#define REG_SC_CLKRST3 0x301d
>> +#define REG_SC_SUB_ID 0x302a
>> +#define REG_SC_SCCB_ID 0x302b
>> +
>> +#define REG_GROUP_ADDRESS_00 0x3200
>> +#define REG_GROUP_ADDRESS_01 0x3201
>> +#define REG_GROUP_ADDRESS_02 0x3202
>> +#define REG_GROUP_ADDRESS_03 0x3203
>> +#define REG_GROUP_ACCESS 0x3208
>> +
>> +#define REG_AWB_R_GAIN_H 0x3400
>> +#define REG_AWB_R_GAIN_L 0x3401
>> +#define REG_AWB_G_GAIN_H 0x3402
>> +#define REG_AWB_G_GAIN_L 0x3403
>> +#define REG_AWB_B_GAIN_H 0x3404
>> +#define REG_AWB_B_GAIN_L 0x3405
>> +#define REG_AWB_MANUAL_CONTROL 0x3406
>> +
>> +#define REG_TIMING_HS_H 0x3800
>> +#define REG_TIMING_HS_L 0x3801
>> +#define REG_TIMING_VS_H 0x3802
>> +#define REG_TIMING_VS_L 0x3803
>> +#define REG_TIMING_HW_H 0x3804
>> +#define REG_TIMING_HW_L 0x3805
>> +#define REG_TIMING_VH_H 0x3806
>> +#define REG_TIMING_VH_L 0x3807
>> +#define REG_TIMING_DVPHO_H 0x3808
>> +#define REG_TIMING_DVPHO_L 0x3809
>> +#define REG_TIMING_DVPVO_H 0x380a
>> +#define REG_TIMING_DVPVO_L 0x380b
>> +#define REG_TIMING_HTS_H 0x380c
>> +#define REG_TIMING_HTS_L 0x380d
>> +#define REG_TIMING_VTS_H 0x380e
>> +#define REG_TIMING_VTS_L 0x380f
>> +#define REG_TIMING_HOFFS_H 0x3810
>> +#define REG_TIMING_HOFFS_L 0x3811
>> +#define REG_TIMING_VOFFS_H 0x3812
>> +#define REG_TIMING_VOFFS_L 0x3813
>> +#define REG_TIMING_XINC 0x3814
>> +#define REG_TIMING_YINC 0x3815
>> +#define REG_TIMING_VERT_FORMAT 0x3820
>> +#define REG_TIMING_HORIZ_FORMAT 0x3821
>> +
>> +#define REG_AEC_PK_EXPOSURE_H 0x3500
>> +#define REG_AEC_PK_EXPOSURE_M 0x3501
>> +#define REG_AEC_PK_EXPOSURE_L 0x3502
>> +#define REG_AEC_PK_MANUAL 0x3503
>> +#define REG_AEC_MANUAL_GAIN_H 0x3504
>> +#define REG_AEC_MANUAL_GAIN_L 0x3505
>> +#define REG_AEC_ADD_VTS_H 0x3506
>> +#define REG_AEC_ADD_VTS_L 0x3507
>> +#define REG_AEK_PK_CTRL_08 0x3508
>> +#define REG_AEK_PK_CTRL_09 0x3509
>> +#define REG_AEC_PK_REAL_GAIN_H 0x350a
>> +#define REG_AEC_PK_REAL_GAIN_L 0x350b
>> +#define REG_AEC_REAL_GAIN_READ_H 0x3510
>> +#define REG_AEC_REAL_GAIN_READ_L 0x3511
>> +#define REG_AEC_SNR_GAIN_READ_H 0x3512
>> +#define REG_AEC_SNR_GAIN_READ_L 0x3513
>> +
>> +#define REG_AEC_CTRL(num) (0x3a00 + num)
>> +
>> +#define REG_FRAME_CTRL00 0x4201
>> +#define REG_FRAME_CTRL01 0x4202
>> +#define REG_FORMAT_CTRL00 0x4300
>> +#define REG_CLIPPING_CTRL 0x4301
>> +
>> +#define REG_VFIFO_READ_CTRL 0x4601
>> +#define REG_VFIFO_CTRL05 0x4605
>> +#define REG_VFIFO_READ_START_H 0x4608
>> +#define REG_VFIFO_READ_START_L 0x4609
>> +
>> +#define REG_DVP_CTRL01 0x4704
>> +#define REG_DVP_CTRL02 0x4708
>> +#define REG_DVP_CTRL03 0x4709
>> +
>> +#define REG_ISP_CTRL00 0x5000
>> +#define REG_ISP_CTRL01 0x5001
>> +#define REG_ISP_CTRL02 0x5002
>> +#define REG_ISP_CTRL07 0x5007
>> +#define REG_ISP_PRE_CTRL00 0x50a0
>> +
>> +#define REG_BLC_CTRL00 0x4000
>> +#define REG_BLC_START_LINE 0x4001
>> +#define REG_BLC_CTRL02 0x4002
>> +#define REG_BLC_CTRL03 0x4003
>> +#define REG_BLC_LINE_NUM 0x4004
>> +#define REG_BLC_TARGET 0x4009
>> +
>> +#define REG_LENC_RED_X0_H 0x500c
>> +#define REG_LENC_RED_X0_L 0x500d
>> +#define REG_LENC_RED_Y0_H 0x500e
>> +#define REG_LENC_RED_Y0_L 0x500f
>> +#define REG_LENC_RED_A1 0x5010
>> +#define REG_LENC_RED_B1 0x5011
>> +#define REG_LENC_RED_A2_B2 0x5012
>> +#define REG_LENC_GREEN_X0_H 0x5013
>> +#define REG_LENC_GREEN_X0_L 0x5014
>> +#define REG_LENC_GREEN_Y0_H 0x5015
>> +#define REG_LENC_GREEN_Y0_L 0x5016
>> +#define REG_LENC_GREEN_A1 0x5017
>> +#define REG_LENC_GREEN_B1 0x5018
>> +#define REG_LENC_GREEN_A2_B2 0x5019
>> +#define REG_LENC_BLUE_X0_H 0x501a
>> +#define REG_LENC_BLUE_X0_L 0x501b
>> +#define REG_LENC_BLUE_Y0_H 0x501c
>> +#define REG_LENC_BLUE_Y0_L 0x501d
>> +#define REG_LENC_BLUE_A1 0x501e
>> +#define REG_LENC_BLUE_B1 0x501f
>> +#define REG_LENC_BLUE_A2_B2 0x5020
>> +#define REG_LENC_CTRL00 0x5021
>> +#define REG_LENC_CTRL01 0x5022
>> +#define REG_COEFFICIENT_THRESH 0x5023
>> +#define REG_COEFFICIENT_MANUAL_VAL 0x5024
>> +
>> +#define REG_GAMMA_YST(num) (0x5025 + (num - 1))
>> +#define REG_GAMMA_YSLP 0x5034
>> +
>> +#define REG_AWB_CTRL00 0x5035
>> +#define REG_AWB_CTRL01 0x5036
>> +#define REG_AWB_CTRL02 0x5037
>> +#define REG_AWB_CTRL03 0x5038
>> +#define REG_AWB_CTRL04 0x5039
>> +#define REG_AWB_LOCAL_LIMIT 0x503a
>> +#define REG_AWB_CTRL12 0x5049
>> +#define REG_AWB_CTRL13 0x504a
>> +#define REG_AWB_CTRL14 0x504b
>> +
>> +#define REG_AVG_CTRL(num) (0x5060 + num)
>> +#define REG_AVG_READOUT 0x5237
>> +
>> +#define REG_SHARPENMT_THRESH1 0x5064
>> +#define REG_SHARPENMT_THRESH2 0x5065
>> +#define REG_SHARPENMT_OFFSET1 0x5066
>> +#define REG_SHARPENMT_OFFSET2 0x5067
>> +#define REG_DENOISE_THRESH1 0x5068
>> +#define REG_DENOISE_THRESH2 0x5069
>> +#define REG_DENOISE_OFFSET1 0x506a
>> +#define REG_DENOISE_OFFSET2 0x506b
>> +#define REG_SHARPEN_THRESH1 0x506c
>> +#define REG_SHARPEN_THRESH2 0x506d
>> +#define REG_CIP_CTRL00 0x506e
>> +#define REG_CIP_CTRL01 0x506f
>> +
>> +#define REG_CMX(num) (0x5070 + (num - 1))
>> +#define REG_CMX_SIGN 0x5079
>> +#define REG_CMX_MISC_CTRL 0x507a
>> +
>> +#define REG_SDE_CTRL(num) (0x507b + num)
>> +
>> +#define REG_SCALE_CTRL0 0x5600
>> +#define REG_SCALE_CTRL1 0x5601
>> +#define REG_XSC_H 0x5602
>> +#define REG_XSC_L 0x5603
>> +#define REG_YSC_H 0x5604
>> +#define REG_YSC_L 0x5605
>> +#define REG_VOFFSET 0x5606
>> +#define REG_NULL 0x0000 /* Array end token */
>> +
>> +#define OV265X_ID(_msb, _lsb) ((_msb) << 8 | (_lsb))
>> +#define OV2659_ID 0x2656
>> +
>> +/* Target Pixel Clock */
>> +#define OV2659_PIXEL_CLOCK 70000000
>
> Shouldn't this be something that comes form DT instead?
>
> It may not matter everywhere, but due to EMI issues not all frequencies
> can be used on some / many boards.
>
Agreed.
>> +
>> +struct sensor_register {
>> + u16 addr;
>> + u8 value;
>> +};
>> +
>> +struct ov2659_framesize {
>> + u16 width;
>> + u16 height;
>> + u16 max_exp_lines;
>> + const struct sensor_register *regs;
>> +};
>> +
>> +struct ov2659_pll_ctrl {
>> + u8 ctrl1;
>> + u8 ctrl2;
>> + u8 ctrl3;
>> +};
>> +
>> +struct ov2659_pixfmt {
>> + u32 code;
>> + u32 colorspace;
>> + /* Output format Register Value (REG_FORMAT_CTRL00) */
>> + struct sensor_register *format_ctrl_regs;
>> +};
>> +
>> +struct pll_ctrl_reg {
>> + unsigned int div;
>> + unsigned char reg;
>> +};
>> +
>> +struct ov2659 {
>> + struct v4l2_subdev sd;
>> + struct media_pad pad;
>> + enum v4l2_mbus_type bus_type;
>> + struct v4l2_mbus_framefmt format;
>> + const struct ov2659_platform_data *pdata;
>> + struct mutex lock;
>> + struct i2c_client *client;
>> + const struct ov2659_framesize *frame_size;
>> + struct sensor_register *format_ctrl_regs;
>> + struct ov2659_pll_ctrl pll;
>> + int streaming;
>> +};
>> +
>> +static const struct sensor_register ov2659_init_regs[] = {
>> + {0x3000, 0x03}, /* IO CTRL */
>> + {0x3001, 0xff}, /* IO CTRL */
>> + {0x3002, 0xe0}, /* IO CTRL */
>> + {0x3633, 0x3d},
>> + {0x3620, 0x02},
>> + {0x3631, 0x11},
>> + {0x3612, 0x04},
>> + {0x3630, 0x20},
>> + {0x4702, 0x02}, /* DVP Debug mode */
>> + {0x370c, 0x34},
>> + {0x3004, 0x10}, /* System Divider */
>> + {0x3005, 0x22}, /* Pixel clock Multiplier */
>
> Do these belong here?
>
>> + {0x3800, 0x00}, /* TIMING */
>> + {0x3801, 0x00}, /* TIMING */
>> + {0x3802, 0x00}, /* TIMING */
>> + {0x3803, 0x00}, /* TIMING */
>> + {0x3804, 0x06}, /* TIMING */
>> + {0x3805, 0x5f}, /* TIMING */
>> + {0x3806, 0x04}, /* TIMING */
>> + {0x3807, 0xb7}, /* TIMING */
>> + {0x3808, 0x03}, /* Horizontal High Byte */
>> + {0x3809, 0x20}, /* Horizontal Low Byte */
>> + {0x380a, 0x02}, /* Vertical High Byte */
>> + {0x380b, 0x58}, /* Vertical Low Byte */
>> + {0x380c, 0x05}, /* TIMING */
>> + {0x380d, 0x14}, /* TIMING */
>> + {0x380e, 0x02}, /* TIMING */
>> + {0x380f, 0x68}, /* TIMING */
>> + {0x3811, 0x08}, /* TIMING */
>> + {0x3813, 0x02}, /* TIMING */
>> + {0x3814, 0x31}, /* TIMING */
>> + {0x3815, 0x31}, /* TIMING */
>> + {0x3a02, 0x02}, /* AEC */
>> + {0x3a03, 0x68}, /* AEC */
>> + {0x3a08, 0x00}, /* AEC */
>> + {0x3a09, 0x5c}, /* AEC */
>> + {0x3a0a, 0x00}, /* AEC */
>> + {0x3a0b, 0x4d}, /* AEC */
>> + {0x3a0d, 0x08}, /* AEC */
>> + {0x3a0e, 0x06}, /* AEC */
>> + {0x3a14, 0x02}, /* AEC */
>> + {0x3a15, 0x28}, /* AEC */
>> + {0x4708, 0x01}, /* DVP */
>> + {0x3623, 0x00},
>> + {0x3634, 0x76},
>> + {0x3701, 0x44},
>> + {0x3702, 0x18},
>> + {0x3703, 0x24},
>> + {0x3704, 0x24},
>> + {0x3705, 0x0c},
>> + {0x3820, 0x81}, /* TIMING */
>> + {0x3821, 0x01}, /* TIMING */
>> + {0x370a, 0x52},
>> + {0x4608, 0x00}, /* VFIFO */
>> + {0x4609, 0x80}, /* VFIFO */
>> + {0x4300, 0x30}, /* Format */
>> + {0x5086, 0x02},
>> + {0x5000, 0xfb}, /* DPC/ISP */
>> + {0x5001, 0x1f}, /* ISP */
>> + {0x5002, 0x00}, /* ISP */
>> + {0x5025, 0x0e}, /* GAMMA */
>> + {0x5026, 0x18}, /* GAMMA */
>> + {0x5027, 0x34}, /* GAMMA */
>> + {0x5028, 0x4c}, /* GAMMA */
>> + {0x5029, 0x62}, /* GAMMA */
>> + {0x502a, 0x74}, /* GAMMA */
>> + {0x502b, 0x85}, /* GAMMA */
>> + {0x502c, 0x92}, /* GAMMA */
>> + {0x502d, 0x9e}, /* GAMMA */
>> + {0x502e, 0xb2}, /* GAMMA */
>> + {0x502f, 0xc0}, /* GAMMA */
>> + {0x5030, 0xcc}, /* GAMMA */
>> + {0x5031, 0xe0}, /* GAMMA */
>> + {0x5032, 0xee}, /* GAMMA */
>> + {0x5033, 0xf6}, /* GAMMA */
>> + {0x5034, 0x11}, /* GAMMA */
>> + {0x5070, 0x1c}, /* CMX */
>> + {0x5071, 0x5b}, /* CMX */
>> + {0x5072, 0x05}, /* CMX */
>> + {0x5073, 0x20}, /* CMX */
>> + {0x5074, 0x94}, /* CMX */
>> + {0x5075, 0xb4}, /* CMX */
>> + {0x5076, 0xb4}, /* CMX */
>> + {0x5077, 0xaf}, /* CMX */
>> + {0x5078, 0x05}, /* CMX */
>> + {0x5079, 0x98}, /* CMX */
>> + {0x507a, 0x21}, /* CMX */
>> + {0x5035, 0x6a}, /* AWB */
>> + {0x5036, 0x11}, /* AWB */
>> + {0x5037, 0x92}, /* AWB */
>> + {0x5038, 0x21}, /* AWB */
>> + {0x5039, 0xe1}, /* AWB */
>> + {0x503a, 0x01}, /* AWB */
>> + {0x503c, 0x05}, /* AWB */
>> + {0x503d, 0x08}, /* AWB */
>> + {0x503e, 0x08}, /* AWB */
>> + {0x503f, 0x64}, /* AWB */
>> + {0x5040, 0x58}, /* AWB */
>> + {0x5041, 0x2a}, /* AWB */
>> + {0x5042, 0xc5}, /* AWB */
>> + {0x5043, 0x2e}, /* AWB */
>> + {0x5044, 0x3a}, /* AWB */
>> + {0x5045, 0x3c}, /* AWB */
>> + {0x5046, 0x44}, /* AWB */
>> + {0x5047, 0xf8}, /* AWB */
>> + {0x5048, 0x08}, /* AWB */
>> + {0x5049, 0x70}, /* AWB */
>> + {0x504a, 0xf0}, /* AWB */
>> + {0x504b, 0xf0}, /* AWB */
>> + {0x500c, 0x03}, /* LENC/ISP TOP Debug */
>> + {0x500d, 0x20}, /* LENC/ISP TOP Debug */
>> + {0x500e, 0x02}, /* LENC/ISP TOP Debug */
>> + {0x500f, 0x5c}, /* LENC/ISP TOP Debug */
>> + {0x5010, 0x48}, /* LENC/ISP TOP Debug */
>> + {0x5011, 0x00}, /* LENC/ISP TOP Debug */
>> + {0x5012, 0x66}, /* LENC/ISP TOP Debug */
>> + {0x5013, 0x03}, /* LENC/ISP TOP Debug */
>> + {0x5014, 0x30}, /* LENC/ISP TOP Debug */
>> + {0x5015, 0x02}, /* LENC/ISP TOP Debug */
>> + {0x5016, 0x7c}, /* LENC/ISP TOP Debug */
>> + {0x5017, 0x40}, /* LENC/ISP TOP Debug */
>> + {0x5018, 0x00}, /* LENC/ISP TOP Debug */
>> + {0x5019, 0x66}, /* LENC/ISP TOP Debug */
>> + {0x501a, 0x03}, /* LENC/ISP TOP Debug */
>> + {0x501b, 0x10}, /* LENC/ISP TOP Debug */
>> + {0x501c, 0x02}, /* LENC/ISP TOP Debug */
>> + {0x501d, 0x7c}, /* LENC/ISP TOP Debug */
>> + {0x501e, 0x3a}, /* LENC/ISP TOP Debug */
>> + {0x501f, 0x00}, /* LENC/ISP TOP Debug */
>> + {0x5020, 0x66}, /* LENC/ISP TOP Debug */
>> + {0x506e, 0x44}, /* CIP/DNS */
>> + {0x5064, 0x08}, /* CIP/DNS */
>> + {0x5065, 0x10}, /* CIP/DNS */
>> + {0x5066, 0x12}, /* CIP/DNS */
>> + {0x5067, 0x02}, /* CIP/DNS */
>> + {0x506c, 0x08}, /* CIP/DNS */
>> + {0x506d, 0x10}, /* CIP/DNS */
>> + {0x506f, 0xa6}, /* CIP/DNS */
>> + {0x5068, 0x08}, /* CIP/DNS */
>> + {0x5069, 0x10}, /* CIP/DNS */
>> + {0x506a, 0x04}, /* CIP/DNS */
>> + {0x506b, 0x12}, /* CIP/DNS */
>> + {0x507e, 0x40}, /* SDE */
>> + {0x507f, 0x20}, /* SDE */
>> + {0x507b, 0x02}, /* SDE */
>> + {0x507a, 0x01}, /* CMX/SDE */
>> + {0x5084, 0x0c}, /* SDE */
>> + {0x5085, 0x3e}, /* SDE */
>> + {0x5005, 0x80}, /* ISP TOP Debug */
>> + {0x3a0f, 0x30}, /* AEC */
>> + {0x3a10, 0x28}, /* AEC */
>> + {0x3a1b, 0x32}, /* AEC */
>> + {0x3a1e, 0x26}, /* AEC */
>> + {0x3a11, 0x60}, /* AEC */
>> + {0x3a1f, 0x14}, /* AEC */
>> + {0x5060, 0x69}, /* Y AVG */
>> + {0x5061, 0x7d}, /* Y AVG */
>> + {0x5062, 0x7d}, /* Y AVG */
>> + {0x5063, 0x69}, /* Y AVG */
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 1280X720 720p */
>> +static struct sensor_register ov2659_720p[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0xa0},
>> + {0x3802, 0x00},
>> + {0x3803, 0xf0},
>> + {0x3804, 0x05},
>> + {0x3805, 0xbf},
>> + {0x3806, 0x03},
>> + {0x3807, 0xcb},
>> + {0x3808, 0x05},
>> + {0x3809, 0x00},
>> + {0x380a, 0x02},
>> + {0x380b, 0xd0},
>> + {0x380c, 0x06},
>> + {0x380d, 0x4c},
>> + {0x380e, 0x02},
>> + {0x380f, 0xe8},
>> + {0x3811, 0x10},
>> + {0x3813, 0x06},
>> + {0x3814, 0x11},
>> + {0x3815, 0x11},
>> + {0x3820, 0x80},
>> + {0x3821, 0x00},
>> + {0x3a03, 0xe8},
>> + {0x3a09, 0x6f},
>> + {0x3a0b, 0x5d},
>> + {0x3a15, 0x9a},
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 1600X1200 UXGA */
>> +static struct sensor_register ov2659_uxga[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0x00},
>> + {0x3802, 0x00},
>> + {0x3803, 0x00},
>> + {0x3804, 0x06},
>> + {0x3805, 0x5f},
>> + {0x3806, 0x04},
>> + {0x3807, 0xbb},
>> + {0x3808, 0x06},
>> + {0x3809, 0x40},
>> + {0x380a, 0x04},
>> + {0x380b, 0xb0},
>> + {0x380c, 0x07},
>> + {0x380d, 0x9f},
>> + {0x380e, 0x04},
>> + {0x380f, 0xd0},
>> + {0x3811, 0x10},
>> + {0x3813, 0x06},
>> + {0x3814, 0x11},
>> + {0x3815, 0x11},
>> + {0x3a02, 0x04},
>> + {0x3a03, 0xd0},
>> + {0x3a08, 0x00},
>> + {0x3a09, 0xb8},
>> + {0x3a0a, 0x00},
>> + {0x3a0b, 0x9a},
>> + {0x3a0d, 0x08},
>> + {0x3a0e, 0x06},
>> + {0x3a14, 0x04},
>> + {0x3a15, 0x50},
>> + {0x3623, 0x00},
>> + {0x3634, 0x44},
>> + {0x3701, 0x44},
>> + {0x3702, 0x30},
>> + {0x3703, 0x48},
>> + {0x3704, 0x48},
>> + {0x3705, 0x18},
>> + {0x3820, 0x80},
>> + {0x3821, 0x00},
>> + {0x370a, 0x12},
>> + {0x4608, 0x00},
>> + {0x4609, 0x80},
>> + {0x5002, 0x00},
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 1280X1024 SXGA */
>> +static struct sensor_register ov2659_sxga[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0x00},
>> + {0x3802, 0x00},
>> + {0x3803, 0x00},
>> + {0x3804, 0x06},
>> + {0x3805, 0x5f},
>> + {0x3806, 0x04},
>> + {0x3807, 0xb7},
>> + {0x3808, 0x05},
>> + {0x3809, 0x00},
>> + {0x380a, 0x04},
>> + {0x380b, 0x00},
>> + {0x380c, 0x07},
>> + {0x380d, 0x9c},
>> + {0x380e, 0x04},
>> + {0x380f, 0xd0},
>> + {0x3811, 0x10},
>> + {0x3813, 0x06},
>> + {0x3814, 0x11},
>> + {0x3815, 0x11},
>> + {0x3a02, 0x02},
>> + {0x3a03, 0x68},
>> + {0x3a08, 0x00},
>> + {0x3a09, 0x5c},
>> + {0x3a0a, 0x00},
>> + {0x3a0b, 0x4d},
>> + {0x3a0d, 0x08},
>> + {0x3a0e, 0x06},
>> + {0x3a14, 0x02},
>> + {0x3a15, 0x28},
>> + {0x3623, 0x00},
>> + {0x3634, 0x76},
>> + {0x3701, 0x44},
>> + {0x3702, 0x18},
>> + {0x3703, 0x24},
>> + {0x3704, 0x24},
>> + {0x3705, 0x0c},
>> + {0x3820, 0x80},
>> + {0x3821, 0x00},
>> + {0x370a, 0x52},
>> + {0x4608, 0x00},
>> + {0x4609, 0x80},
>> + {0x5002, 0x00},
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 1024X768 SXGA */
>> +static struct sensor_register ov2659_xga[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0x00},
>> + {0x3802, 0x00},
>> + {0x3803, 0x00},
>> + {0x3804, 0x06},
>> + {0x3805, 0x5f},
>> + {0x3806, 0x04},
>> + {0x3807, 0xb7},
>> + {0x3808, 0x04},
>> + {0x3809, 0x00},
>> + {0x380a, 0x03},
>> + {0x380b, 0x00},
>> + {0x380c, 0x07},
>> + {0x380d, 0x9c},
>> + {0x380e, 0x04},
>> + {0x380f, 0xd0},
>> + {0x3811, 0x10},
>> + {0x3813, 0x06},
>> + {0x3814, 0x11},
>> + {0x3815, 0x11},
>> + {0x3a02, 0x02},
>> + {0x3a03, 0x68},
>> + {0x3a08, 0x00},
>> + {0x3a09, 0x5c},
>> + {0x3a0a, 0x00},
>> + {0x3a0b, 0x4d},
>> + {0x3a0d, 0x08},
>> + {0x3a0e, 0x06},
>> + {0x3a14, 0x02},
>> + {0x3a15, 0x28},
>> + {0x3623, 0x00},
>> + {0x3634, 0x76},
>> + {0x3701, 0x44},
>> + {0x3702, 0x18},
>> + {0x3703, 0x24},
>> + {0x3704, 0x24},
>> + {0x3705, 0x0c},
>> + {0x3820, 0x80},
>> + {0x3821, 0x00},
>> + {0x370a, 0x52},
>> + {0x4608, 0x00},
>> + {0x4609, 0x80},
>> + {0x5002, 0x00},
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 800X600 SVGA */
>> +static struct sensor_register ov2659_svga[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0x00},
>> + {0x3802, 0x00},
>> + {0x3803, 0x00},
>> + {0x3804, 0x06},
>> + {0x3805, 0x5f},
>> + {0x3806, 0x04},
>> + {0x3807, 0xb7},
>> + {0x3808, 0x03},
>> + {0x3809, 0x20},
>> + {0x380a, 0x02},
>> + {0x380b, 0x58},
>> + {0x380c, 0x05},
>> + {0x380d, 0x14},
>> + {0x380e, 0x02},
>> + {0x380f, 0x68},
>> + {0x3811, 0x08},
>> + {0x3813, 0x02},
>> + {0x3814, 0x31},
>> + {0x3815, 0x31},
>> + {0x3a02, 0x02},
>> + {0x3a03, 0x68},
>> + {0x3a08, 0x00},
>> + {0x3a09, 0x5c},
>> + {0x3a0a, 0x00},
>> + {0x3a0b, 0x4d},
>> + {0x3a0d, 0x08},
>> + {0x3a0e, 0x06},
>> + {0x3a14, 0x02},
>> + {0x3a15, 0x28},
>> + {0x3623, 0x00},
>> + {0x3634, 0x76},
>> + {0x3701, 0x44},
>> + {0x3702, 0x18},
>> + {0x3703, 0x24},
>> + {0x3704, 0x24},
>> + {0x3705, 0x0c},
>> + {0x3820, 0x81},
>> + {0x3821, 0x01},
>> + {0x370a, 0x52},
>> + {0x4608, 0x00},
>> + {0x4609, 0x80},
>> + {0x5002, 0x00},
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 640X480 VGA */
>> +static struct sensor_register ov2659_vga[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0x00},
>> + {0x3802, 0x00},
>> + {0x3803, 0x00},
>> + {0x3804, 0x06},
>> + {0x3805, 0x5f},
>> + {0x3806, 0x04},
>> + {0x3807, 0xb7},
>> + {0x3808, 0x02},
>> + {0x3809, 0x80},
>> + {0x380a, 0x01},
>> + {0x380b, 0xe0},
>> + {0x380c, 0x05},
>> + {0x380d, 0x14},
>> + {0x380e, 0x02},
>> + {0x380f, 0x68},
>> + {0x3811, 0x08},
>> + {0x3813, 0x02},
>> + {0x3814, 0x31},
>> + {0x3815, 0x31},
>> + {0x3a02, 0x02},
>> + {0x3a03, 0x68},
>> + {0x3a08, 0x00},
>> + {0x3a09, 0x5c},
>> + {0x3a0a, 0x00},
>> + {0x3a0b, 0x4d},
>> + {0x3a0d, 0x08},
>> + {0x3a0e, 0x06},
>> + {0x3a14, 0x02},
>> + {0x3a15, 0x28},
>> + {0x3623, 0x00},
>> + {0x3634, 0x76},
>> + {0x3701, 0x44},
>> + {0x3702, 0x18},
>> + {0x3703, 0x24},
>> + {0x3704, 0x24},
>> + {0x3705, 0x0c},
>> + {0x3820, 0x81},
>> + {0x3821, 0x01},
>> + {0x370a, 0x52},
>> + {0x4608, 0x00},
>> + {0x4609, 0x80},
>> + {0x5002, 0x10},
>> + {0x0000, 0x00}
>> +};
>> +
>> +/* 320X240 QVGA */
>> +static struct sensor_register ov2659_qvga[] = {
>> + {0x3800, 0x00},
>> + {0x3801, 0x00},
>> + {0x3802, 0x00},
>> + {0x3803, 0x00},
>> + {0x3804, 0x06},
>> + {0x3805, 0x5f},
>> + {0x3806, 0x04},
>> + {0x3807, 0xb7},
>> + {0x3808, 0x01},
>> + {0x3809, 0x40},
>> + {0x380a, 0x00},
>> + {0x380b, 0xf0},
>> + {0x380c, 0x05},
>> + {0x380d, 0x14},
>> + {0x380e, 0x02},
>> + {0x380f, 0x68},
>> + {0x3811, 0x08},
>> + {0x3813, 0x02},
>> + {0x3814, 0x31},
>> + {0x3815, 0x31},
>> + {0x3a02, 0x02},
>> + {0x3a03, 0x68},
>> + {0x3a08, 0x00},
>> + {0x3a09, 0x5c},
>> + {0x3a0a, 0x00},
>> + {0x3a0b, 0x4d},
>> + {0x3a0d, 0x08},
>> + {0x3a0e, 0x06},
>> + {0x3a14, 0x02},
>> + {0x3a15, 0x28},
>> + {0x3623, 0x00},
>> + {0x3634, 0x76},
>> + {0x3701, 0x44},
>> + {0x3702, 0x18},
>> + {0x3703, 0x24},
>> + {0x3704, 0x24},
>> + {0x3705, 0x0c},
>> + {0x3820, 0x81},
>> + {0x3821, 0x01},
>> + {0x370a, 0x52},
>> + {0x4608, 0x00},
>> + {0x4609, 0x80},
>> + {0x5002, 0x10},
>> + {0x0000, 0x00}
>> +};
>> +
>> +static const struct pll_ctrl_reg ctrl3[] = {
>> + {1, 0x00},
>> + {2, 0x02},
>> + {3, 0x03},
>> + {4, 0x06},
>> + {6, 0x0d},
>> + {8, 0x0e},
>> + {12, 0x0f},
>> + {16, 0x12},
>> + {24, 0x13},
>> + {32, 0x16},
>> + {48, 0x1b},
>> + {64, 0x1e},
>> + {96, 0x1f},
>> + {0, 0x00},
>> +};
>> +
>> +static const struct pll_ctrl_reg ctrl1[] = {
>> + {2, 0x10},
>> + {4, 0x20},
>> + {6, 0x30},
>> + {8, 0x40},
>> + {10, 0x50},
>> + {12, 0x60},
>> + {14, 0x70},
>> + {16, 0x80},
>> + {18, 0x90},
>> + {20, 0xa0},
>> + {22, 0xb0},
>> + {24, 0xc0},
>> + {26, 0xd0},
>> + {28, 0xe0},
>> + {30, 0xf0},
>> + {0, 0x00},
>> +};
>> +
>> +static const struct ov2659_framesize ov2659_framesizes[] = {
>> + { /* QVGA */
>> + .width = 320,
>> + .height = 240,
>> + .regs = ov2659_qvga,
>> + .max_exp_lines = 248,
>> + }, { /* VGA */
>> + .width = 640,
>> + .height = 480,
>> + .regs = ov2659_vga,
>> + .max_exp_lines = 498,
>> + }, { /* SVGA */
>> + .width = 800,
>> + .height = 600,
>> + .regs = ov2659_svga,
>> + .max_exp_lines = 498,
>> + }, { /* XGA */
>> + .width = 1024,
>> + .height = 768,
>> + .regs = ov2659_xga,
>> + .max_exp_lines = 498,
>> + }, { /* 720P */
>> + .width = 1280,
>> + .height = 720,
>> + .regs = ov2659_720p,
>> + .max_exp_lines = 498,
>> + }, { /* SXGA */
>> + .width = 1280,
>> + .height = 1024,
>> + .regs = ov2659_sxga,
>> + .max_exp_lines = 1048,
>> + }, { /* UXGA */
>> + .width = 1600,
>> + .height = 1200,
>> + .regs = ov2659_uxga,
>> + .max_exp_lines = 498,
>> + },
>> +};
>> +
>> +/* YUV422 YUYV*/
>> +static struct sensor_register ov2659_format_yuyv[] = {
>> + {0x4300, 0x30},
>> + {0x0000, 0x0},
>> +};
>> +
>> +/* YUV422 UYVY */
>> +static struct sensor_register ov2659_format_uyvy[] = {
>> + {0x4300, 0x32},
>> + {0x0000, 0x0},
>> +};
>> +
>> +/* Raw Bayer BGGR */
>> +static struct sensor_register ov2659_format_bggr[] = {
>> + {0x4300, 0x00},
>> + {0x0000, 0x0}
>> +};
>> +
>> +/* RGB565 */
>> +static struct sensor_register ov2659_format_rgb565[] = {
>> + {0x4300, 0x60},
>> + {0x0000, 0x0},
>> +};
>> +
>> +static const struct ov2659_pixfmt ov2659_formats[] = {
>> + {
>> + .code = MEDIA_BUS_FMT_YUYV8_2X8,
>> + .colorspace = V4L2_COLORSPACE_JPEG,
>> + .format_ctrl_regs = ov2659_format_yuyv,
>> + },
>> + {
>> + .code = MEDIA_BUS_FMT_UYVY8_2X8,
>> + .colorspace = V4L2_COLORSPACE_JPEG,
>> + .format_ctrl_regs = ov2659_format_uyvy,
>> + },
>> + {
>> + .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
>> + .colorspace = V4L2_COLORSPACE_JPEG,
>> + .format_ctrl_regs = ov2659_format_rgb565,
>> + },
>> + {
>> + .code = MEDIA_BUS_FMT_SBGGR8_1X8,
>> + .colorspace = V4L2_COLORSPACE_SMPTE170M,
>> + .format_ctrl_regs = ov2659_format_bggr,
>> + },
>> +};
>> +
>> +static inline struct ov2659 *to_ov2659(struct v4l2_subdev *sd)
>> +{
>> + return container_of(sd, struct ov2659, sd);
>> +}
>> +
>> +/* sensor register write */
>> +static int ov2659_write(struct i2c_client *client, u16 reg, u8 val)
>> +{
>> + struct i2c_msg msg[1];
>
> An array of size 1? :-) How about just plain msg scalar value instead?
>
Ah my bad :(, will do.
>> + u8 buf[3];
>> + int ret;
>> +
>> + buf[0] = reg >> 8;
>> + buf[1] = reg & 0xFF;
>> + buf[2] = val;
>> +
>> + msg->addr = client->addr;
>> + msg->flags = client->flags;
>> + msg->buf = buf;
>> + msg->len = sizeof(buf);
>> +
>> + ret = i2c_transfer(client->adapter, msg, 1);
>> + if (ret >= 0)
>> + return 0;
>> +
>> + dev_dbg(&client->dev,
>> + "ov2659 write reg(0x%x val:0x%x) failed !\n", reg, val);
>> +
>> + return ret;
>> +}
>> +
>> +/* sensor register read */
>> +static int ov2659_read(struct i2c_client *client, u16 reg, u8 *val)
>> +{
>> + struct i2c_msg msg[2];
>> + u8 buf[2];
>> + int ret;
>> +
>> + buf[0] = reg >> 8;
>> + buf[1] = reg & 0xFF;
>> +
>> + msg[0].addr = client->addr;
>> + msg[0].flags = client->flags;
>> + msg[0].buf = buf;
>> + msg[0].len = sizeof(buf);
>> +
>> + msg[1].addr = client->addr;
>> + msg[1].flags = client->flags | I2C_M_RD;
>> + msg[1].buf = buf;
>> + msg[1].len = 1;
>> +
>> + ret = i2c_transfer(client->adapter, msg, 2);
>> + if (ret >= 0) {
>> + *val = buf[0];
>> + return 0;
>> + }
>> +
>> + dev_dbg(&client->dev,
>> + "ov2659 read reg(0x%x val:0x%x) failed !\n", reg, *val);
>> +
>> + return ret;
>> +}
>> +
>> +static int ov2659_write_array(struct i2c_client *client,
>> + const struct sensor_register *regs)
>> +{
>> + int i, ret = 0;
>> +
>> + for (i = 0; ret == 0 && regs[i].addr; i++)
>> + ret = ov2659_write(client, regs[i].addr, regs[i].value);
>> +
>> + return ret;
>> +}
>> +
>> +static unsigned int ov2659_pll_calc_params(struct ov2659 *ov2659)
>> +{
>> + const struct ov2659_platform_data *pdata = ov2659->pdata;
>> + u8 ctrl1_reg = 0, ctrl2_reg = 0, ctrl3_reg = 0;
>> + struct i2c_client *client = ov2659->client;
>> + u32 s_prediv = 1, s_postdiv = 1, s_mult = 1;
>> + u32 desired = OV2659_PIXEL_CLOCK;
>> + u32 prediv, postdiv, mult;
>> + u32 bestdelta = -1;
>> + u32 delta, actual;
>> + int i, j;
>> +
>> + for (i = 0; ctrl1[i].div != 0; i++) {
>> + postdiv = ctrl1[i].div;
>> + for (j = 0; ctrl3[j].div != 0; j++) {
>> + prediv = ctrl3[j].div;
>> + for (mult = 1; mult <= 63; mult++) {
>> + actual = pdata->xvclk_frequency;
>> + actual *= mult;
>
> I don't know about the exact composition of the PLL you have in this sensor,
> however there typically are frequency limits in different parts of the PLL
> tree. They are not checked here.
>
Ok will add a check for those.
>> + actual /= prediv;
>> + actual /= postdiv;
>> + delta = (actual-desired);
>> + delta = abs(delta);
>> +
>> + if ((delta < bestdelta) || (bestdelta == -1)) {
>> + bestdelta = delta;
>> + s_mult = mult;
>> + s_prediv = prediv;
>> + s_postdiv = postdiv;
>> + ctrl1_reg = ctrl1[i].reg;
>> + ctrl2_reg = mult;
>> + ctrl3_reg = ctrl3[j].reg;
>> + }
>> + }
>> + }
>> + }
>> + actual = pdata->xvclk_frequency * (s_mult);
>> + actual /= (s_prediv) * (s_postdiv);
>> +
>> + dev_dbg(&client->dev, "Actual osc: %u pixel_clock: %u\n",
>> + pdata->xvclk_frequency, actual);
>> +
>> + ov2659->pll.ctrl1 = ctrl1_reg;
>> + ov2659->pll.ctrl2 = ctrl2_reg;
>> + ov2659->pll.ctrl3 = ctrl3_reg;
>> +
>> + dev_dbg(&client->dev,
>> + "Actual reg config: ctrl1_reg: %02x ctrl2_reg: %02x ctrl3_reg: %02x\n",
>> + ctrl1_reg, ctrl2_reg, ctrl3_reg);
>> +
>> + return actual;
>> +}
>> +
>> +static int ov2659_set_pixel_clock(struct ov2659 *ov2659)
>> +{
>> + struct i2c_client *client = ov2659->client;
>> + struct sensor_register pll_regs[] = {
>> + {0x3004, 0x10}, /* System Divider */
>
> You have human readable names for these registers. Please use them instead.
>
OK.
>> + {0x3005, 0x22}, /* Pixel clock Multiplier */
>> + {0x3006, 0x0d}, /* System Divider */
>> + {0x0000, 0x00},
>> + };
>> +
>> + pll_regs[0].value = ov2659->pll.ctrl1;
>> + pll_regs[1].value = ov2659->pll.ctrl2;
>> + pll_regs[2].value = ov2659->pll.ctrl3;
>
> You could assign these in variable declaration rather than overwriting
> the values here.
>
OK.
>> + dev_dbg(&client->dev, "%s\n", __func__);
>> +
>> + return ov2659_write_array(client, pll_regs);
>> +};
>> +
>> +static void ov2659_get_default_format(struct v4l2_mbus_framefmt *format)
>> +{
>> + format->width = ov2659_framesizes[2].width;
>> + format->height = ov2659_framesizes[2].height;
>> + format->colorspace = ov2659_formats[0].colorspace;
>> + format->code = ov2659_formats[0].code;
>> + format->field = V4L2_FIELD_NONE;
>> +}
>> +
>> +static void ov2659_set_streaming(struct ov2659 *ov2659, int on)
>> +{
>> + struct i2c_client *client = ov2659->client;
>> + int ret;
>> +
>> + on = !!on;
>> +
>> + dev_dbg(&client->dev, "%s: on: %d\n", __func__, on);
>> +
>> + ret = ov2659_write(client, REG_SOFTWARE_STANDBY, on);
>> + if (ret)
>> + dev_err(&client->dev, "ov2659 soft standby failed\n");
>> +}
>> +
>> +static int ov2659_reset(struct v4l2_subdev *sd, u32 val)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + int ret;
>> +
>> + ret = ov2659_write(client, REG_SOFTWARE_RESET, 0x01);
>> + if (ret != 0) {
>> + dev_err(&client->dev, "Sensor soft reset failed\n");
>> + return -ENODEV;
>> + }
>> + usleep_range(1000, 2000);
>> +
>> + return 0;
>> +}
>> +
>> +static int ov2659_init(struct v4l2_subdev *sd, u32 val)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> +
>> + return ov2659_write_array(client, ov2659_init_regs);
>> +}
>> +
>> +/*
>> + * V4L2 subdev video and pad level operations
>> + */
>> +
>> +static int ov2659_enum_mbus_code(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> +
>> + dev_dbg(&client->dev, "%s:\n", __func__);
>> +
>> + if (code->index >= ARRAY_SIZE(ov2659_formats))
>> + return -EINVAL;
>> +
>> + code->code = ov2659_formats[code->index].code;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov2659_enum_frame_sizes(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_frame_size_enum *fse)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + int i = ARRAY_SIZE(ov2659_formats);
>> +
>> + dev_dbg(&client->dev, "%s:\n", __func__);
>> +
>> + if (fse->index >= ARRAY_SIZE(ov2659_framesizes))
>> + return -EINVAL;
>> +
>> + while (--i)
>> + if (fse->code == ov2659_formats[i].code)
>> + break;
>> +
>> + fse->code = ov2659_formats[i].code;
>> +
>> + fse->min_width = ov2659_framesizes[fse->index].width;
>> + fse->max_width = fse->min_width;
>> + fse->max_height = ov2659_framesizes[fse->index].height;
>> + fse->min_height = fse->max_height;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov2659_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_format *fmt)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + struct ov2659 *ov2659 = to_ov2659(sd);
>> + struct v4l2_mbus_framefmt *mf;
>> +
>> + dev_dbg(&client->dev, "ov2659_get_fmt\n");
>> +
>> + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
>> + mf = v4l2_subdev_get_try_format(fh, 0);
>> + fmt->format = *mf;
>> + return 0;
>> + }
>> +
>> + mutex_lock(&ov2659->lock);
>> + fmt->format = ov2659->format;
>> + mutex_unlock(&ov2659->lock);
>> +
>> + dev_dbg(&client->dev, "ov2659_get_fmt: %x %dx%d\n",
>> + ov2659->format.code, ov2659->format.width,
>> + ov2659->format.height);
>> +
>> + return 0;
>> +}
>> +
>> +static void __ov2659_try_frame_size(struct v4l2_mbus_framefmt *mf,
>> + const struct ov2659_framesize **size)
>> +{
>> + const struct ov2659_framesize *fsize = &ov2659_framesizes[0];
>> + const struct ov2659_framesize *match = NULL;
>> + int i = ARRAY_SIZE(ov2659_framesizes);
>> + unsigned int min_err = UINT_MAX;
>> +
>> + while (i--) {
>> + int err = abs(fsize->width - mf->width)
>> + + abs(fsize->height - mf->height);
>> + if ((err < min_err) && (fsize->regs[0].addr)) {
>> + min_err = err;
>> + match = fsize;
>> + }
>> + fsize++;
>> + }
>> +
>> + if (!match)
>> + match = &ov2659_framesizes[2];
>> +
>> + mf->width = match->width;
>> + mf->height = match->height;
>> +
>> + if (size)
>> + *size = match;
>> +}
>> +
>> +static int ov2659_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
>> + struct v4l2_subdev_format *fmt)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + unsigned int index = ARRAY_SIZE(ov2659_formats);
>> + struct v4l2_mbus_framefmt *mf = &fmt->format;
>> + const struct ov2659_framesize *size = NULL;
>> + struct ov2659 *ov2659 = to_ov2659(sd);
>> +
>> + dev_dbg(&client->dev, "ov2659_set_fmt\n");
>> +
>> + __ov2659_try_frame_size(mf, &size);
>> +
>> + while (--index >= 0)
>> + if (ov2659_formats[index].code == mf->code)
>> + break;
>> +
>> + if (index < 0)
>> + return -EINVAL;
>> +
>> + mf->colorspace = V4L2_COLORSPACE_JPEG;
>> + mf->code = ov2659_formats[index].code;
>> + mf->field = V4L2_FIELD_NONE;
>> +
>> + mutex_lock(&ov2659->lock);
>> +
>> + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
>> + if (fh) {
>> + mf = v4l2_subdev_get_try_format(fh, fmt->pad);
>> + *mf = fmt->format;
>> + }
>> + } else {
>> + if (ov2659->streaming) {
>> + mutex_unlock(&ov2659->lock);
>> + return -EBUSY;
>> + }
>> +
>> + ov2659->frame_size = size;
>> + ov2659->format = fmt->format;
>> + ov2659->format_ctrl_regs =
>> + ov2659_formats[index].format_ctrl_regs;
>> + }
>> +
>> + mutex_unlock(&ov2659->lock);
>> + return 0;
>> +}
>> +
>> +static int ov2659_set_frame_size(struct ov2659 *ov2659)
>> +{
>> + struct i2c_client *client = ov2659->client;
>> +
>> + dev_dbg(&client->dev, "%s\n", __func__);
>> +
>> + return ov2659_write_array(ov2659->client,
>> + ov2659->frame_size->regs);
>> +}
>> +
>> +static int ov2659_set_format(struct ov2659 *ov2659)
>> +{
>> + struct i2c_client *client = ov2659->client;
>> +
>> + dev_dbg(&client->dev, "%s\n", __func__);
>> +
>> + return ov2659_write_array(ov2659->client,
>> + ov2659->format_ctrl_regs);
>> +}
>> +
>> +static int ov2659_s_stream(struct v4l2_subdev *sd, int on)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + struct ov2659 *ov2659 = to_ov2659(sd);
>> + int ret = 0;
>> +
>> + dev_dbg(&client->dev, "%s: on: %d\n", __func__, on);
>> +
>> + mutex_lock(&ov2659->lock);
>> +
>> + on = !!on;
>> +
>> + if (ov2659->streaming == on)
>> + goto unlock;
>> +
>> + if (!on) {
>> + /* Stop Streaming Sequence */
>> + ov2659_set_streaming(ov2659, 0);
>> + ov2659->streaming = on;
>> + mutex_unlock(&ov2659->lock);
>> + goto unlock;
>> + }
>> +
>> + ov2659_set_pixel_clock(ov2659);
>> + ov2659_set_frame_size(ov2659);
>> + ov2659_set_format(ov2659);
>> + ov2659_set_streaming(ov2659, 1);
>> + ov2659->streaming = on;
>> +
>> +unlock:
>> + mutex_unlock(&ov2659->lock);
>> + return ret;
>> +}
>> +
>> +/* -----------------------------------------------------------------------------
>> + * V4L2 subdev internal operations
>> + */
>> +
>> +static int ov2659_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(subdev);
>> + struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0);
>> +
>> + dev_dbg(&client->dev, "%s:\n", __func__);
>> +
>> + ov2659_get_default_format(format);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_core_ops ov2659_subdev_core_ops = {
>> + .reset = ov2659_reset,
>
> Do you really need this?
>
Will check.
>> + .init = ov2659_init,
>> + .log_status = v4l2_ctrl_subdev_log_status,
>> + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
>> + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
>> +};
>> +
>> +static const struct v4l2_subdev_video_ops ov2659_subdev_video_ops = {
>> + .s_stream = ov2659_s_stream,
>> +};
>> +
>> +static const struct v4l2_subdev_pad_ops ov2659_subdev_pad_ops = {
>> + .enum_mbus_code = ov2659_enum_mbus_code,
>> + .enum_frame_size = ov2659_enum_frame_sizes,
>> + .get_fmt = ov2659_get_fmt,
>> + .set_fmt = ov2659_set_fmt,
>> +};
>> +
>> +static const struct v4l2_subdev_ops ov2659_subdev_ops = {
>> + .core = &ov2659_subdev_core_ops,
>> + .video = &ov2659_subdev_video_ops,
>> + .pad = &ov2659_subdev_pad_ops,
>> +};
>> +
>> +static const struct v4l2_subdev_internal_ops ov2659_subdev_internal_ops = {
>> + .open = ov2659_open,
>> +};
>> +
>> +static int ov2659_detect(struct v4l2_subdev *sd)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(sd);
>> + u8 pid, ver;
>> + int ret;
>> +
>> + dev_dbg(&client->dev, "%s:\n", __func__);
>> +
>> + ret = ov2659_init(sd, 0);
>> + if (ret < 0)
>> + return ret;
>> +
>> + /* Check sensor revision */
>> + ret = ov2659_read(client, REG_SC_CHIP_ID_H, &pid);
>> + if (!ret)
>> + ret = ov2659_read(client, REG_SC_CHIP_ID_L, &ver);
>> +
>> + if (!ret) {
>> + unsigned short id;
>> +
>> + id = OV265X_ID(pid, ver);
>> + if (id != OV2659_ID)
>> + dev_err(&client->dev,
>> + "Sensor detection failed (%04X, %d)\n",
>> + id, ret);
>> + else
>> + dev_info(&client->dev, "Found OV%04X sensor\n", id);
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static struct ov2659_platform_data *
>> +ov2659_get_pdata(struct i2c_client *client)
>> +{
>> + struct ov2659_platform_data *pdata;
>> + struct device_node *endpoint;
>> + int ret;
>> +
>> + dev_dbg(&client->dev, "ov2659_get_pdata invoked\n");
>> +
>> + if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
>> + return client->dev.platform_data;
>> +
>> + dev_dbg(&client->dev, "ov2659_get_pdata: DT Node found\n");
>
> If you wish to make this easier to debug, I'd probably print a warning or an
> error when things don't work, rather than printing a debug message when all
> is well. :-)
>
OK
>> + endpoint = of_graph_get_next_endpoint(client->dev.of_node, NULL);
>> + if (!endpoint)
>> + return NULL;
>> +
>> + dev_dbg(&client->dev, "ov2659_get_pdata: endpoint found\n");
>> +
>> + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
>> + if (!pdata)
>> + goto done;
>> +
>> + ret = of_property_read_u32(endpoint, "xvclk-frequency",
>> + &pdata->xvclk_frequency);
>> + if (ret < 0) {
>> + dev_info(&client->dev, "using default %u Hz clock frequency\n",
>> + pdata->xvclk_frequency);
>
> What's the default? Zero? I think I'd just return an error if this happens.
>
OK.
>> + }
>> +
>> +done:
>> + of_node_put(endpoint);
>> + return pdata;
>> +}
>> +
>> +static int ov2659_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + const struct ov2659_platform_data *pdata = ov2659_get_pdata(client);
>> + struct v4l2_subdev *sd;
>> + struct ov2659 *ov2659;
>> + unsigned int xvclk;
>> + struct clk *clk;
>> + int ret;
>> +
>> + if (!pdata) {
>> + dev_err(&client->dev, "platform data not specified\n");
>> + return -EINVAL;
>> + }
>> +
>> + ov2659 = devm_kzalloc(&client->dev, sizeof(*ov2659), GFP_KERNEL);
>> + if (!ov2659)
>> + return -ENOMEM;
>> +
>> + ov2659->pdata = pdata;
>> + mutex_init(&ov2659->lock);
>> + ov2659->client = client;
>> +
>> + clk = devm_clk_get(&client->dev, "xvclk");
>> + if (IS_ERR(clk))
>> + return PTR_ERR(clk);
>
> You should do mutex_destroy() if probe fails. If you don't need the mutex
> quite yet, I'd perhaps initialise it later on.
>
thanks for the catch!
>> +
>> + xvclk = clk_get_rate(clk);
>> + if (xvclk != pdata->xvclk_frequency || xvclk < 6000000 ||
>> + xvclk > 27000000)
>> + return -EINVAL;
>> +
>> + sd = &ov2659->sd;
>> + client->flags |= I2C_CLIENT_SCCB;
>> + v4l2_i2c_subdev_init(sd, client, &ov2659_subdev_ops);
>> + strlcpy(sd->name, DRIVER_NAME, sizeof(sd->name));
>
> Please add the i2c bus and address to the sub-device name (%d-%4.4x).
>
OK.
>> +
>> + sd->internal_ops = &ov2659_subdev_internal_ops;
>> + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
>> + V4L2_SUBDEV_FL_HAS_EVENTS;
>> +
>> +#if defined(CONFIG_MEDIA_CONTROLLER)
>> + ov2659->pad.flags = MEDIA_PAD_FL_SOURCE;
>> + sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
>> + ret = media_entity_init(&sd->entity, 1, &ov2659->pad, 0);
>> + if (ret < 0)
>> + return ret;
>> +#endif
>> +
>> + ov2659_get_default_format(&ov2659->format);
>> + ov2659->frame_size = &ov2659_framesizes[2];
>> + ov2659->format_ctrl_regs = ov2659_formats[0].format_ctrl_regs;
>> +
>> + ret = ov2659_detect(sd);
>> + if (ret < 0)
>> + goto error;
>> +
>> + /* Calculate the PLL register value needed */
>> + ov2659_pll_calc_params(ov2659);
>> +
>> + ret = v4l2_async_register_subdev(&ov2659->sd);
>> + if (ret)
>> + goto error;
>> +
>> + dev_info(&client->dev, "%s sensor driver registered !!\n", sd->name);
>> +
>> + return 0;
>> +
>> +error:
>> +#if defined(CONFIG_MEDIA_CONTROLLER)
>> + media_entity_cleanup(&sd->entity);
>> +#endif
>> + return ret;
>> +}
>> +
>> +static int ov2659_remove(struct i2c_client *client)
>> +{
>> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
>> +
>> + v4l2_device_unregister_subdev(sd);
>> +#if defined(CONFIG_MEDIA_CONTROLLER)
>> + media_entity_cleanup(&sd->entity);
>> +#endif
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id ov2659_id[] = {
>> + { "ov2659", 0 },
>> + { /* sentinel */ },
>> +};
>> +MODULE_DEVICE_TABLE(i2c, ov2659_id);
>> +
>> +#if IS_ENABLED(CONFIG_OF)
>> +static const struct of_device_id ov2659_of_match[] = {
>> + { .compatible = "ovti,ov2659", },
>
> This is not documented in
> Documentation/devicetree/bindings/vendor-prefixes.txt . Could you add a
> patch for that, please?
>
I did post it along with v1, but there was patch already posted [1]
which is probably queued in Rob's tree.
[1] http://patchwork.ozlabs.org/patch/416685/
Thanks,
--Prabhakar Lad
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