- 根目录:
- drivers
- media
- i2c
- soc_camera
- ov9740.c
/*
* OmniVision OV9740 Camera Driver
*
* Copyright (C) 2011 NVIDIA Corporation
*
* Based on ov9640 camera driver.
*
* 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/v4l2-mediabus.h>
#include <media/soc_camera.h>
#include <media/v4l2-clk.h>
#include <media/v4l2-ctrls.h>
#define to_ov9740(sd) container_of(sd, struct ov9740_priv, subdev)
/* General Status Registers */
#define OV9740_MODEL_ID_HI 0x0000
#define OV9740_MODEL_ID_LO 0x0001
#define OV9740_REVISION_NUMBER 0x0002
#define OV9740_MANUFACTURER_ID 0x0003
#define OV9740_SMIA_VERSION 0x0004
/* General Setup Registers */
#define OV9740_MODE_SELECT 0x0100
#define OV9740_IMAGE_ORT 0x0101
#define OV9740_SOFTWARE_RESET 0x0103
#define OV9740_GRP_PARAM_HOLD 0x0104
#define OV9740_MSK_CORRUP_FM 0x0105
/* Timing Setting */
#define OV9740_FRM_LENGTH_LN_HI 0x0340 /* VTS */
#define OV9740_FRM_LENGTH_LN_LO 0x0341 /* VTS */
#define OV9740_LN_LENGTH_PCK_HI 0x0342 /* HTS */
#define OV9740_LN_LENGTH_PCK_LO 0x0343 /* HTS */
#define OV9740_X_ADDR_START_HI 0x0344
#define OV9740_X_ADDR_START_LO 0x0345
#define OV9740_Y_ADDR_START_HI 0x0346
#define OV9740_Y_ADDR_START_LO 0x0347
#define OV9740_X_ADDR_END_HI 0x0348
#define OV9740_X_ADDR_END_LO 0x0349
#define OV9740_Y_ADDR_END_HI 0x034a
#define OV9740_Y_ADDR_END_LO 0x034b
#define OV9740_X_OUTPUT_SIZE_HI 0x034c
#define OV9740_X_OUTPUT_SIZE_LO 0x034d
#define OV9740_Y_OUTPUT_SIZE_HI 0x034e
#define OV9740_Y_OUTPUT_SIZE_LO 0x034f
/* IO Control Registers */
#define OV9740_IO_CREL00 0x3002
#define OV9740_IO_CREL01 0x3004
#define OV9740_IO_CREL02 0x3005
#define OV9740_IO_OUTPUT_SEL01 0x3026
#define OV9740_IO_OUTPUT_SEL02 0x3027
/* AWB Registers */
#define OV9740_AWB_MANUAL_CTRL 0x3406
/* Analog Control Registers */
#define OV9740_ANALOG_CTRL01 0x3601
#define OV9740_ANALOG_CTRL02 0x3602
#define OV9740_ANALOG_CTRL03 0x3603
#define OV9740_ANALOG_CTRL04 0x3604
#define OV9740_ANALOG_CTRL10 0x3610
#define OV9740_ANALOG_CTRL12 0x3612
#define OV9740_ANALOG_CTRL15 0x3615
#define OV9740_ANALOG_CTRL20 0x3620
#define OV9740_ANALOG_CTRL21 0x3621
#define OV9740_ANALOG_CTRL22 0x3622
#define OV9740_ANALOG_CTRL30 0x3630
#define OV9740_ANALOG_CTRL31 0x3631
#define OV9740_ANALOG_CTRL32 0x3632
#define OV9740_ANALOG_CTRL33 0x3633
/* Sensor Control */
#define OV9740_SENSOR_CTRL03 0x3703
#define OV9740_SENSOR_CTRL04 0x3704
#define OV9740_SENSOR_CTRL05 0x3705
#define OV9740_SENSOR_CTRL07 0x3707
/* Timing Control */
#define OV9740_TIMING_CTRL17 0x3817
#define OV9740_TIMING_CTRL19 0x3819
#define OV9740_TIMING_CTRL33 0x3833
#define OV9740_TIMING_CTRL35 0x3835
/* Banding Filter */
#define OV9740_AEC_MAXEXPO_60_H 0x3a02
#define OV9740_AEC_MAXEXPO_60_L 0x3a03
#define OV9740_AEC_B50_STEP_HI 0x3a08
#define OV9740_AEC_B50_STEP_LO 0x3a09
#define OV9740_AEC_B60_STEP_HI 0x3a0a
#define OV9740_AEC_B60_STEP_LO 0x3a0b
#define OV9740_AEC_CTRL0D 0x3a0d
#define OV9740_AEC_CTRL0E 0x3a0e
#define OV9740_AEC_MAXEXPO_50_H 0x3a14
#define OV9740_AEC_MAXEXPO_50_L 0x3a15
/* AEC/AGC Control */
#define OV9740_AEC_ENABLE 0x3503
#define OV9740_GAIN_CEILING_01 0x3a18
#define OV9740_GAIN_CEILING_02 0x3a19
#define OV9740_AEC_HI_THRESHOLD 0x3a11
#define OV9740_AEC_3A1A 0x3a1a
#define OV9740_AEC_CTRL1B_WPT2 0x3a1b
#define OV9740_AEC_CTRL0F_WPT 0x3a0f
#define OV9740_AEC_CTRL10_BPT 0x3a10
#define OV9740_AEC_CTRL1E_BPT2 0x3a1e
#define OV9740_AEC_LO_THRESHOLD 0x3a1f
/* BLC Control */
#define OV9740_BLC_AUTO_ENABLE 0x4002
#define OV9740_BLC_MODE 0x4005
/* VFIFO */
#define OV9740_VFIFO_READ_START_HI 0x4608
#define OV9740_VFIFO_READ_START_LO 0x4609
/* DVP Control */
#define OV9740_DVP_VSYNC_CTRL02 0x4702
#define OV9740_DVP_VSYNC_MODE 0x4704
#define OV9740_DVP_VSYNC_CTRL06 0x4706
/* PLL Setting */
#define OV9740_PLL_MODE_CTRL01 0x3104
#define OV9740_PRE_PLL_CLK_DIV 0x0305
#define OV9740_PLL_MULTIPLIER 0x0307
#define OV9740_VT_SYS_CLK_DIV 0x0303
#define OV9740_VT_PIX_CLK_DIV 0x0301
#define OV9740_PLL_CTRL3010 0x3010
#define OV9740_VFIFO_CTRL00 0x460e
/* ISP Control */
#define OV9740_ISP_CTRL00 0x5000
#define OV9740_ISP_CTRL01 0x5001
#define OV9740_ISP_CTRL03 0x5003
#define OV9740_ISP_CTRL05 0x5005
#define OV9740_ISP_CTRL12 0x5012
#define OV9740_ISP_CTRL19 0x5019
#define OV9740_ISP_CTRL1A 0x501a
#define OV9740_ISP_CTRL1E 0x501e
#define OV9740_ISP_CTRL1F 0x501f
#define OV9740_ISP_CTRL20 0x5020
#define OV9740_ISP_CTRL21 0x5021
/* AWB */
#define OV9740_AWB_CTRL00 0x5180
#define OV9740_AWB_CTRL01 0x5181
#define OV9740_AWB_CTRL02 0x5182
#define OV9740_AWB_CTRL03 0x5183
#define OV9740_AWB_ADV_CTRL01 0x5184
#define OV9740_AWB_ADV_CTRL02 0x5185
#define OV9740_AWB_ADV_CTRL03 0x5186
#define OV9740_AWB_ADV_CTRL04 0x5187
#define OV9740_AWB_ADV_CTRL05 0x5188
#define OV9740_AWB_ADV_CTRL06 0x5189
#define OV9740_AWB_ADV_CTRL07 0x518a
#define OV9740_AWB_ADV_CTRL08 0x518b
#define OV9740_AWB_ADV_CTRL09 0x518c
#define OV9740_AWB_ADV_CTRL10 0x518d
#define OV9740_AWB_ADV_CTRL11 0x518e
#define OV9740_AWB_CTRL0F 0x518f
#define OV9740_AWB_CTRL10 0x5190
#define OV9740_AWB_CTRL11 0x5191
#define OV9740_AWB_CTRL12 0x5192
#define OV9740_AWB_CTRL13 0x5193
#define OV9740_AWB_CTRL14 0x5194
/* MIPI Control */
#define OV9740_MIPI_CTRL00 0x4800
#define OV9740_MIPI_3837 0x3837
#define OV9740_MIPI_CTRL01 0x4801
#define OV9740_MIPI_CTRL03 0x4803
#define OV9740_MIPI_CTRL05 0x4805
#define OV9740_VFIFO_RD_CTRL 0x4601
#define OV9740_MIPI_CTRL_3012 0x3012
#define OV9740_SC_CMMM_MIPI_CTR 0x3014
#define OV9740_MAX_WIDTH 1280
#define OV9740_MAX_HEIGHT 720
/* Misc. structures */
struct ov9740_reg {
u16 reg;
u8 val;
};
struct ov9740_priv {
struct v4l2_subdev subdev;
struct v4l2_ctrl_handler hdl;
struct v4l2_clk *clk;
u16 model;
u8 revision;
u8 manid;
u8 smiaver;
bool flag_vflip;
bool flag_hflip;
/* For suspend/resume. */
struct v4l2_mbus_framefmt current_mf;
bool current_enable;
};
static const struct ov9740_reg ov9740_defaults[] = {
/* Software Reset */
{ OV9740_SOFTWARE_RESET, 0x01 },
/* Banding Filter */
{ OV9740_AEC_B50_STEP_HI, 0x00 },
{ OV9740_AEC_B50_STEP_LO, 0xe8 },
{ OV9740_AEC_CTRL0E, 0x03 },
{ OV9740_AEC_MAXEXPO_50_H, 0x15 },
{ OV9740_AEC_MAXEXPO_50_L, 0xc6 },
{ OV9740_AEC_B60_STEP_HI, 0x00 },
{ OV9740_AEC_B60_STEP_LO, 0xc0 },
{ OV9740_AEC_CTRL0D, 0x04 },
{ OV9740_AEC_MAXEXPO_60_H, 0x18 },
{ OV9740_AEC_MAXEXPO_60_L, 0x20 },
/* LC */
{ 0x5842, 0x02 }, { 0x5843, 0x5e }, { 0x5844, 0x04 }, { 0x5845, 0x32 },
{ 0x5846, 0x03 }, { 0x5847, 0x29 }, { 0x5848, 0x02 }, { 0x5849, 0xcc },
/* Un-documented OV9740 registers */
{ 0x5800, 0x29 }, { 0x5801, 0x25 }, { 0x5802, 0x20 }, { 0x5803, 0x21 },
{ 0x5804, 0x26 }, { 0x5805, 0x2e }, { 0x5806, 0x11 }, { 0x5807, 0x0c },
{ 0x5808, 0x09 }, { 0x5809, 0x0a }, { 0x580a, 0x0e }, { 0x580b, 0x16 },
{ 0x580c, 0x06 }, { 0x580d, 0x02 }, { 0x580e, 0x00 }, { 0x580f, 0x00 },
{ 0x5810, 0x04 }, { 0x5811, 0x0a }, { 0x5812, 0x05 }, { 0x5813, 0x02 },
{ 0x5814, 0x00 }, { 0x5815, 0x00 }, { 0x5816, 0x03 }, { 0x5817, 0x09 },
{ 0x5818, 0x0f }, { 0x5819, 0x0a }, { 0x581a, 0x07 }, { 0x581b, 0x08 },
{ 0x581c, 0x0b }, { 0x581d, 0x14 }, { 0x581e, 0x28 }, { 0x581f, 0x23 },
{ 0x5820, 0x1d }, { 0x5821, 0x1e }, { 0x5822, 0x24 }, { 0x5823, 0x2a },
{ 0x5824, 0x4f }, { 0x5825, 0x6f }, { 0x5826, 0x5f }, { 0x5827, 0x7f },
{ 0x5828, 0x9f }, { 0x5829, 0x5f }, { 0x582a, 0x8f }, { 0x582b, 0x9e },
{ 0x582c, 0x8f }, { 0x582d, 0x9f }, { 0x582e, 0x4f }, { 0x582f, 0x87 },
{ 0x5830, 0x86 }, { 0x5831, 0x97 }, { 0x5832, 0xae }, { 0x5833, 0x3f },
{ 0x5834, 0x8e }, { 0x5835, 0x7c }, { 0x5836, 0x7e }, { 0x5837, 0xaf },
{ 0x5838, 0x8f }, { 0x5839, 0x8f }, { 0x583a, 0x9f }, { 0x583b, 0x7f },
{ 0x583c, 0x5f },
/* Y Gamma */
{ 0x5480, 0x07 }, { 0x5481, 0x18 }, { 0x5482, 0x2c }, { 0x5483, 0x4e },
{ 0x5484, 0x5e }, { 0x5485, 0x6b }, { 0x5486, 0x77 }, { 0x5487, 0x82 },
{ 0x5488, 0x8c }, { 0x5489, 0x95 }, { 0x548a, 0xa4 }, { 0x548b, 0xb1 },
{ 0x548c, 0xc6 }, { 0x548d, 0xd8 }, { 0x548e, 0xe9 },
/* UV Gamma */
{ 0x5490, 0x0f }, { 0x5491, 0xff }, { 0x5492, 0x0d }, { 0x5493, 0x05 },
{ 0x5494, 0x07 }, { 0x5495, 0x1a }, { 0x5496, 0x04 }, { 0x5497, 0x01 },
{ 0x5498, 0x03 }, { 0x5499, 0x53 }, { 0x549a, 0x02 }, { 0x549b, 0xeb },
{ 0x549c, 0x02 }, { 0x549d, 0xa0 }, { 0x549e, 0x02 }, { 0x549f, 0x67 },
{ 0x54a0, 0x02 }, { 0x54a1, 0x3b }, { 0x54a2, 0x02 }, { 0x54a3, 0x18 },
{ 0x54a4, 0x01 }, { 0x54a5, 0xe7 }, { 0x54a6, 0x01 }, { 0x54a7, 0xc3 },
{ 0x54a8, 0x01 }, { 0x54a9, 0x94 }, { 0x54aa, 0x01 }, { 0x54ab, 0x72 },
{ 0x54ac, 0x01 }, { 0x54ad, 0x57 },
/* AWB */
{ OV9740_AWB_CTRL00, 0xf0 },
{ OV9740_AWB_CTRL01, 0x00 },
{ OV9740_AWB_CTRL02, 0x41 },
{ OV9740_AWB_CTRL03, 0x42 },
{ OV9740_AWB_ADV_CTRL01, 0x8a },
{ OV9740_AWB_ADV_CTRL02, 0x61 },
{ OV9740_AWB_ADV_CTRL03, 0xce },
{ OV9740_AWB_ADV_CTRL04, 0xa8 },
{ OV9740_AWB_ADV_CTRL05, 0x17 },
{ OV9740_AWB_ADV_CTRL06, 0x1f },
{ OV9740_AWB_ADV_CTRL07, 0x27 },
{ OV9740_AWB_ADV_CTRL08, 0x41 },
{ OV9740_AWB_ADV_CTRL09, 0x34 },
{ OV9740_AWB_ADV_CTRL10, 0xf0 },
{ OV9740_AWB_ADV_CTRL11, 0x10 },
{ OV9740_AWB_CTRL0F, 0xff },
{ OV9740_AWB_CTRL10, 0x00 },
{ OV9740_AWB_CTRL11, 0xff },
{ OV9740_AWB_CTRL12, 0x00 },
{ OV9740_AWB_CTRL13, 0xff },
{ OV9740_AWB_CTRL14, 0x00 },
/* CIP */
{ 0x530d, 0x12 },
/* CMX */
{ 0x5380, 0x01 }, { 0x5381, 0x00 }, { 0x5382, 0x00 }, { 0x5383, 0x17 },
{ 0x5384, 0x00 }, { 0x5385, 0x01 }, { 0x5386, 0x00 }, { 0x5387, 0x00 },
{ 0x5388, 0x00 }, { 0x5389, 0xe0 }, { 0x538a, 0x00 }, { 0x538b, 0x20 },
{ 0x538c, 0x00 }, { 0x538d, 0x00 }, { 0x538e, 0x00 }, { 0x538f, 0x16 },
{ 0x5390, 0x00 }, { 0x5391, 0x9c }, { 0x5392, 0x00 }, { 0x5393, 0xa0 },
{ 0x5394, 0x18 },
/* 50/60 Detection */
{ 0x3c0a, 0x9c }, { 0x3c0b, 0x3f },
/* Output Select */
{ OV9740_IO_OUTPUT_SEL01, 0x00 },
{ OV9740_IO_OUTPUT_SEL02, 0x00 },
{ OV9740_IO_CREL00, 0x00 },
{ OV9740_IO_CREL01, 0x00 },
{ OV9740_IO_CREL02, 0x00 },
/* AWB Control */
{ OV9740_AWB_MANUAL_CTRL, 0x00 },
/* Analog Control */
{ OV9740_ANALOG_CTRL03, 0xaa },
{ OV9740_ANALOG_CTRL32, 0x2f },
{ OV9740_ANALOG_CTRL20, 0x66 },
{ OV9740_ANALOG_CTRL21, 0xc0 },
{ OV9740_ANALOG_CTRL31, 0x52 },
{ OV9740_ANALOG_CTRL33, 0x50 },
{ OV9740_ANALOG_CTRL30, 0xca },
{ OV9740_ANALOG_CTRL04, 0x0c },
{ OV9740_ANALOG_CTRL01, 0x40 },
{ OV9740_ANALOG_CTRL02, 0x16 },
{ OV9740_ANALOG_CTRL10, 0xa1 },
{ OV9740_ANALOG_CTRL12, 0x24 },
{ OV9740_ANALOG_CTRL22, 0x9f },
{ OV9740_ANALOG_CTRL15, 0xf0 },
/* Sensor Control */
{ OV9740_SENSOR_CTRL03, 0x42 },
{ OV9740_SENSOR_CTRL04, 0x10 },
{ OV9740_SENSOR_CTRL05, 0x45 },
{ OV9740_SENSOR_CTRL07, 0x14 },
/* Timing Control */
{ OV9740_TIMING_CTRL33, 0x04 },
{ OV9740_TIMING_CTRL35, 0x02 },
{ OV9740_TIMING_CTRL19, 0x6e },
{ OV9740_TIMING_CTRL17, 0x94 },
/* AEC/AGC Control */
{ OV9740_AEC_ENABLE, 0x10 },
{ OV9740_GAIN_CEILING_01, 0x00 },
{ OV9740_GAIN_CEILING_02, 0x7f },
{ OV9740_AEC_HI_THRESHOLD, 0xa0 },
{ OV9740_AEC_3A1A, 0x05 },
{ OV9740_AEC_CTRL1B_WPT2, 0x50 },
{ OV9740_AEC_CTRL0F_WPT, 0x50 },
{ OV9740_AEC_CTRL10_BPT, 0x4c },
{ OV9740_AEC_CTRL1E_BPT2, 0x4c },
{ OV9740_AEC_LO_THRESHOLD, 0x26 },
/* BLC Control */
{ OV9740_BLC_AUTO_ENABLE, 0x45 },
{ OV9740_BLC_MODE, 0x18 },
/* DVP Control */
{ OV9740_DVP_VSYNC_CTRL02, 0x04 },
{ OV9740_DVP_VSYNC_MODE, 0x00 },
{ OV9740_DVP_VSYNC_CTRL06, 0x08 },
/* PLL Setting */
{ OV9740_PLL_MODE_CTRL01, 0x20 },
{ OV9740_PRE_PLL_CLK_DIV, 0x03 },
{ OV9740_PLL_MULTIPLIER, 0x4c },
{ OV9740_VT_SYS_CLK_DIV, 0x01 },
{ OV9740_VT_PIX_CLK_DIV, 0x08 },
{ OV9740_PLL_CTRL3010, 0x01 },
{ OV9740_VFIFO_CTRL00, 0x82 },
/* Timing Setting */
/* VTS */
{ OV9740_FRM_LENGTH_LN_HI, 0x03 },
{ OV9740_FRM_LENGTH_LN_LO, 0x07 },
/* HTS */
{ OV9740_LN_LENGTH_PCK_HI, 0x06 },
{ OV9740_LN_LENGTH_PCK_LO, 0x62 },
/* MIPI Control */
{ OV9740_MIPI_CTRL00, 0x44 }, /* 0x64 for discontinuous clk */
{ OV9740_MIPI_3837, 0x01 },
{ OV9740_MIPI_CTRL01, 0x0f },
{ OV9740_MIPI_CTRL03, 0x05 },
{ OV9740_MIPI_CTRL05, 0x10 },
{ OV9740_VFIFO_RD_CTRL, 0x16 },
{ OV9740_MIPI_CTRL_3012, 0x70 },
{ OV9740_SC_CMMM_MIPI_CTR, 0x01 },
/* YUYV order */
{ OV9740_ISP_CTRL19, 0x02 },
};
static u32 ov9740_codes[] = {
MEDIA_BUS_FMT_YUYV8_2X8,
};
/* read a register */
static int ov9740_reg_read(struct i2c_client *client, u16 reg, u8 *val)
{
int ret;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = (u8 *)®,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = 1,
.buf = val,
},
};
reg = swab16(reg);
ret = i2c_transfer(client->adapter, msg, 2);
if (ret < 0) {
dev_err(&client->dev, "Failed reading register 0x%04x!\n", reg);
return ret;
}
return 0;
}
/* write a register */
static int ov9740_reg_write(struct i2c_client *client, u16 reg, u8 val)
{
struct i2c_msg msg;
struct {
u16 reg;
u8 val;
} __packed buf;
int ret;
reg = swab16(reg);
buf.reg = reg;
buf.val = val;
msg.addr = client->addr;
msg.flags = 0;
msg.len = 3;
msg.buf = (u8 *)&buf;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0) {
dev_err(&client->dev, "Failed writing register 0x%04x!\n", reg);
return ret;
}
return 0;
}
/* Read a register, alter its bits, write it back */
static int ov9740_reg_rmw(struct i2c_client *client, u16 reg, u8 set, u8 unset)
{
u8 val;
int ret;
ret = ov9740_reg_read(client, reg, &val);
if (ret < 0) {
dev_err(&client->dev,
"[Read]-Modify-Write of register 0x%04x failed!\n",
reg);
return ret;
}
val |= set;
val &= ~unset;
ret = ov9740_reg_write(client, reg, val);
if (ret < 0) {
dev_err(&client->dev,
"Read-Modify-[Write] of register 0x%04x failed!\n",
reg);
return ret;
}
return 0;
}
static int ov9740_reg_write_array(struct i2c_client *client,
const struct ov9740_reg *regarray,
int regarraylen)
{
int i;
int ret;
for (i = 0; i < regarraylen; i++) {
ret = ov9740_reg_write(client,
regarray[i].reg, regarray[i].val);
if (ret < 0)
return ret;
}
return 0;
}
/* Start/Stop streaming from the device */
static int ov9740_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov9740_priv *priv = to_ov9740(sd);
int ret;
/* Program orientation register. */
if (priv->flag_vflip)
ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0x2, 0);
else
ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0, 0x2);
if (ret < 0)
return ret;
if (priv->flag_hflip)
ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0x1, 0);
else
ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0, 0x1);
if (ret < 0)
return ret;
if (enable) {
dev_dbg(&client->dev, "Enabling Streaming\n");
/* Start Streaming */
ret = ov9740_reg_write(client, OV9740_MODE_SELECT, 0x01);
} else {
dev_dbg(&client->dev, "Disabling Streaming\n");
/* Software Reset */
ret = ov9740_reg_write(client, OV9740_SOFTWARE_RESET, 0x01);
if (!ret)
/* Setting Streaming to Standby */
ret = ov9740_reg_write(client, OV9740_MODE_SELECT,
0x00);
}
priv->current_enable = enable;
return ret;
}
/* select nearest higher resolution for capture */
static void ov9740_res_roundup(u32 *width, u32 *height)
{
/* Width must be a multiple of 4 pixels. */
*width = ALIGN(*width, 4);
/* Max resolution is 1280x720 (720p). */
if (*width > OV9740_MAX_WIDTH)
*width = OV9740_MAX_WIDTH;
if (*height > OV9740_MAX_HEIGHT)
*height = OV9740_MAX_HEIGHT;
}
/* Setup registers according to resolution and color encoding */
static int ov9740_set_res(struct i2c_client *client, u32 width, u32 height)
{
u32 x_start;
u32 y_start;
u32 x_end;
u32 y_end;
bool scaling = false;
u32 scale_input_x;
u32 scale_input_y;
int ret;
if ((width != OV9740_MAX_WIDTH) || (height != OV9740_MAX_HEIGHT))
scaling = true;
/*
* Try to use as much of the sensor area as possible when supporting
* smaller resolutions. Depending on the aspect ratio of the
* chosen resolution, we can either use the full width of the sensor,
* or the full height of the sensor (or both if the aspect ratio is
* the same as 1280x720.
*/
if ((OV9740_MAX_WIDTH * height) > (OV9740_MAX_HEIGHT * width)) {
scale_input_x = (OV9740_MAX_HEIGHT * width) / height;
scale_input_y = OV9740_MAX_HEIGHT;
} else {
scale_input_x = OV9740_MAX_WIDTH;
scale_input_y = (OV9740_MAX_WIDTH * height) / width;
}
/* These describe the area of the sensor to use. */
x_start = (OV9740_MAX_WIDTH - scale_input_x) / 2;
y_start = (OV9740_MAX_HEIGHT - scale_input_y) / 2;
x_end = x_start + scale_input_x - 1;
y_end = y_start + scale_input_y - 1;
ret = ov9740_reg_write(client, OV9740_X_ADDR_START_HI, x_start >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_X_ADDR_START_LO, x_start & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_HI, y_start >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_LO, y_start & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_X_ADDR_END_HI, x_end >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_X_ADDR_END_LO, x_end & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_HI, y_end >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_LO, y_end & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_HI, width >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_LO, width & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_HI, height >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_LO, height & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL1E, scale_input_x >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL1F, scale_input_x & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL20, scale_input_y >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL21, scale_input_y & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_HI,
(scale_input_x - width) >> 8);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_LO,
(scale_input_x - width) & 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL00, 0xff);
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL01, 0xef |
(scaling << 4));
if (ret)
goto done;
ret = ov9740_reg_write(client, OV9740_ISP_CTRL03, 0xff);
done:
return ret;
}
/* set the format we will capture in */
static int ov9740_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov9740_priv *priv = to_ov9740(sd);
enum v4l2_colorspace cspace;
u32 code = mf->code;
int ret;
ov9740_res_roundup(&mf->width, &mf->height);
switch (code) {
case MEDIA_BUS_FMT_YUYV8_2X8:
cspace = V4L2_COLORSPACE_SRGB;
break;
default:
return -EINVAL;
}
ret = ov9740_reg_write_array(client, ov9740_defaults,
ARRAY_SIZE(ov9740_defaults));
if (ret < 0)
return ret;
ret = ov9740_set_res(client, mf->width, mf->height);
if (ret < 0)
return ret;
mf->code = code;
mf->colorspace = cspace;
memcpy(&priv->current_mf, mf, sizeof(struct v4l2_mbus_framefmt));
return ret;
}
static int ov9740_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
ov9740_res_roundup(&mf->width, &mf->height);
mf->field = V4L2_FIELD_NONE;
mf->code = MEDIA_BUS_FMT_YUYV8_2X8;
mf->colorspace = V4L2_COLORSPACE_SRGB;
return 0;
}
static int ov9740_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
u32 *code)
{
if (index >= ARRAY_SIZE(ov9740_codes))
return -EINVAL;
*code = ov9740_codes[index];
return 0;
}
static int ov9740_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = OV9740_MAX_WIDTH;
a->bounds.height = OV9740_MAX_HEIGHT;
a->defrect = a->bounds;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int ov9740_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
a->c.left = 0;
a->c.top = 0;
a->c.width = OV9740_MAX_WIDTH;
a->c.height = OV9740_MAX_HEIGHT;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
/* Set status of additional camera capabilities */
static int ov9740_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov9740_priv *priv =
container_of(ctrl->handler, struct ov9740_priv, hdl);
switch (ctrl->id) {
case V4L2_CID_VFLIP:
priv->flag_vflip = ctrl->val;
break;
case V4L2_CID_HFLIP:
priv->flag_hflip = ctrl->val;
break;
default:
return -EINVAL;
}
return 0;
}
static int ov9740_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
struct ov9740_priv *priv = to_ov9740(sd);
int ret;
if (on) {
ret = soc_camera_power_on(&client->dev, ssdd, priv->clk);
if (ret < 0)
return ret;
if (priv->current_enable) {
ov9740_s_fmt(sd, &priv->current_mf);
ov9740_s_stream(sd, 1);
}
} else {
if (priv->current_enable) {
ov9740_s_stream(sd, 0);
priv->current_enable = true;
}
soc_camera_power_off(&client->dev, ssdd, priv->clk);
}
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov9740_get_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
u8 val;
if (reg->reg & ~0xffff)
return -EINVAL;
reg->size = 2;
ret = ov9740_reg_read(client, reg->reg, &val);
if (ret)
return ret;
reg->val = (__u64)val;
return ret;
}
static int ov9740_set_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (reg->reg & ~0xffff || reg->val & ~0xff)
return -EINVAL;
return ov9740_reg_write(client, reg->reg, reg->val);
}
#endif
static int ov9740_video_probe(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov9740_priv *priv = to_ov9740(sd);
u8 modelhi, modello;
int ret;
ret = ov9740_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
*/
ret = ov9740_reg_read(client, OV9740_MODEL_ID_HI, &modelhi);
if (ret < 0)
goto done;
ret = ov9740_reg_read(client, OV9740_MODEL_ID_LO, &modello);
if (ret < 0)
goto done;
priv->model = (modelhi << 8) | modello;
ret = ov9740_reg_read(client, OV9740_REVISION_NUMBER, &priv->revision);
if (ret < 0)
goto done;
ret = ov9740_reg_read(client, OV9740_MANUFACTURER_ID, &priv->manid);
if (ret < 0)
goto done;
ret = ov9740_reg_read(client, OV9740_SMIA_VERSION, &priv->smiaver);
if (ret < 0)
goto done;
if (priv->model != 0x9740) {
ret = -ENODEV;
goto done;
}
dev_info(&client->dev, "ov9740 Model ID 0x%04x, Revision 0x%02x, "
"Manufacturer 0x%02x, SMIA Version 0x%02x\n",
priv->model, priv->revision, priv->manid, priv->smiaver);
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
ov9740_s_power(&priv->subdev, 0);
return ret;
}
/* Request bus settings on camera side */
static int ov9740_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
V4L2_MBUS_DATA_ACTIVE_HIGH;
cfg->type = V4L2_MBUS_PARALLEL;
cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
return 0;
}
static struct v4l2_subdev_video_ops ov9740_video_ops = {
.s_stream = ov9740_s_stream,
.s_mbus_fmt = ov9740_s_fmt,
.try_mbus_fmt = ov9740_try_fmt,
.enum_mbus_fmt = ov9740_enum_fmt,
.cropcap = ov9740_cropcap,
.g_crop = ov9740_g_crop,
.g_mbus_config = ov9740_g_mbus_config,
};
static struct v4l2_subdev_core_ops ov9740_core_ops = {
.s_power = ov9740_s_power,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov9740_get_register,
.s_register = ov9740_set_register,
#endif
};
static struct v4l2_subdev_ops ov9740_subdev_ops = {
.core = &ov9740_core_ops,
.video = &ov9740_video_ops,
};
static const struct v4l2_ctrl_ops ov9740_ctrl_ops = {
.s_ctrl = ov9740_s_ctrl,
};
/*
* i2c_driver function
*/
static int ov9740_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct ov9740_priv *priv;
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
int ret;
if (!ssdd) {
dev_err(&client->dev, "Missing platform_data for driver\n");
return -EINVAL;
}
priv = devm_kzalloc(&client->dev, sizeof(struct ov9740_priv), GFP_KERNEL);
if (!priv) {
dev_err(&client->dev, "Failed to allocate private data!\n");
return -ENOMEM;
}
v4l2_i2c_subdev_init(&priv->subdev, client, &ov9740_subdev_ops);
v4l2_ctrl_handler_init(&priv->hdl, 13);
v4l2_ctrl_new_std(&priv->hdl, &ov9740_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&priv->hdl, &ov9740_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
priv->subdev.ctrl_handler = &priv->hdl;
if (priv->hdl.error)
return priv->hdl.error;
priv->clk = v4l2_clk_get(&client->dev, "mclk");
if (IS_ERR(priv->clk)) {
ret = PTR_ERR(priv->clk);
goto eclkget;
}
ret = ov9740_video_probe(client);
if (ret < 0) {
v4l2_clk_put(priv->clk);
eclkget:
v4l2_ctrl_handler_free(&priv->hdl);
}
return ret;
}
static int ov9740_remove(struct i2c_client *client)
{
struct ov9740_priv *priv = i2c_get_clientdata(client);
v4l2_clk_put(priv->clk);
v4l2_device_unregister_subdev(&priv->subdev);
v4l2_ctrl_handler_free(&priv->hdl);
return 0;
}
static const struct i2c_device_id ov9740_id[] = {
{ "ov9740", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov9740_id);
static struct i2c_driver ov9740_i2c_driver = {
.driver = {
.name = "ov9740",
},
.probe = ov9740_probe,
.remove = ov9740_remove,
.id_table = ov9740_id,
};
module_i2c_driver(ov9740_i2c_driver);
MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV9740");
MODULE_AUTHOR("Andrew Chew <achew@nvidia.com>");
MODULE_LICENSE("GPL v2");