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linux / linux / kernel / git / torvalds / linux / c3eb11fbb826879be773c137f281569efce67aa8 / . / drivers / staging / media / atomisp / i2c / atomisp-ov2680.c
blob: fa1de45b7a2df6fb861066c61004759326c3a81e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Support for OmniVision OV2680 1080p HD camera sensor.
*
* Copyright (c) 2013 Intel Corporation. All Rights Reserved.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <asm/unaligned.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/moduleparam.h>
#include <media/v4l2-device.h>
#include <linux/io.h>
#include <linux/acpi.h>
#include "../include/linux/atomisp_gmin_platform.h"
#include "ov2680.h"
static int h_flag;
static int v_flag;
static enum atomisp_bayer_order ov2680_bayer_order_mapping[] = {
atomisp_bayer_order_bggr,
atomisp_bayer_order_grbg,
atomisp_bayer_order_gbrg,
atomisp_bayer_order_rggb,
};
/* i2c read/write stuff */
static int ov2680_read_reg(struct i2c_client *client,
int len, u16 reg, u32 *val)
{
struct i2c_msg msgs[2];
u8 addr_buf[2] = { reg >> 8, reg & 0xff };
u8 data_buf[4] = { 0, };
int ret;
if (len > 4)
return -EINVAL;
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = ARRAY_SIZE(addr_buf);
msgs[0].buf = addr_buf;
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = &data_buf[4 - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs)) {
dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret);
return -EIO;
}
*val = get_unaligned_be32(data_buf);
return 0;
}
static int ov2680_write_reg(struct i2c_client *client, unsigned int len,
u16 reg, u16 val)
{
u8 buf[6];
int ret;
if (len == 2)
put_unaligned_be16(val, buf + 2);
else if (len == 1)
buf[2] = val;
else
return -EINVAL;
put_unaligned_be16(reg, buf);
ret = i2c_master_send(client, buf, len + 2);
if (ret != len + 2) {
dev_err(&client->dev, "write error %d reg 0x%04x, val 0x%02x: buf sent: %*ph\n",
ret, reg, val, len + 2, &buf);
return -EIO;
}
return 0;
}
static int ov2680_write_reg_array(struct i2c_client *client,
const struct ov2680_reg *reglist)
{
const struct ov2680_reg *next = reglist;
int ret;
for (; next->reg != 0; next++) {
ret = ov2680_write_reg(client, 1, next->reg, next->val);
if (ret)
return ret;
}
return 0;
}
static int ov2680_g_focal(struct v4l2_subdev *sd, s32 *val)
{
*val = (OV2680_FOCAL_LENGTH_NUM << 16) | OV2680_FOCAL_LENGTH_DEM;
return 0;
}
static int ov2680_g_fnumber(struct v4l2_subdev *sd, s32 *val)
{
/* const f number for ov2680 */
*val = (OV2680_F_NUMBER_DEFAULT_NUM << 16) | OV2680_F_NUMBER_DEM;
return 0;
}
static int ov2680_g_fnumber_range(struct v4l2_subdev *sd, s32 *val)
{
*val = (OV2680_F_NUMBER_DEFAULT_NUM << 24) |
(OV2680_F_NUMBER_DEM << 16) |
(OV2680_F_NUMBER_DEFAULT_NUM << 8) | OV2680_F_NUMBER_DEM;
return 0;
}
static int ov2680_g_bin_factor_x(struct v4l2_subdev *sd, s32 *val)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
dev_dbg(&client->dev, "++++ov2680_g_bin_factor_x\n");
*val = dev->res->bin_factor_x;
return 0;
}
static int ov2680_g_bin_factor_y(struct v4l2_subdev *sd, s32 *val)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
*val = dev->res->bin_factor_y;
dev_dbg(&client->dev, "++++ov2680_g_bin_factor_y\n");
return 0;
}
static int ov2680_get_intg_factor(struct i2c_client *client,
struct camera_mipi_info *info,
const struct ov2680_resolution *res)
{
struct atomisp_sensor_mode_data *buf = &info->data;
unsigned int pix_clk_freq_hz;
u32 reg_val;
int ret;
dev_dbg(&client->dev, "++++ov2680_get_intg_factor\n");
if (!info)
return -EINVAL;
/* pixel clock */
pix_clk_freq_hz = res->pix_clk_freq * 1000000;
buf->vt_pix_clk_freq_mhz = pix_clk_freq_hz;
/* get integration time */
buf->coarse_integration_time_min = OV2680_COARSE_INTG_TIME_MIN;
buf->coarse_integration_time_max_margin =
OV2680_COARSE_INTG_TIME_MAX_MARGIN;
buf->fine_integration_time_min = OV2680_FINE_INTG_TIME_MIN;
buf->fine_integration_time_max_margin =
OV2680_FINE_INTG_TIME_MAX_MARGIN;
buf->fine_integration_time_def = OV2680_FINE_INTG_TIME_MIN;
buf->frame_length_lines = res->lines_per_frame;
buf->line_length_pck = res->pixels_per_line;
buf->read_mode = res->bin_mode;
/* get the cropping and output resolution to ISP for this mode. */
ret = ov2680_read_reg(client, 2,
OV2680_HORIZONTAL_START_H, &reg_val);
if (ret)
return ret;
buf->crop_horizontal_start = reg_val;
ret = ov2680_read_reg(client, 2,
OV2680_VERTICAL_START_H, &reg_val);
if (ret)
return ret;
buf->crop_vertical_start = reg_val;
ret = ov2680_read_reg(client, 2,
OV2680_HORIZONTAL_END_H, &reg_val);
if (ret)
return ret;
buf->crop_horizontal_end = reg_val;
ret = ov2680_read_reg(client, 2,
OV2680_VERTICAL_END_H, &reg_val);
if (ret)
return ret;
buf->crop_vertical_end = reg_val;
ret = ov2680_read_reg(client, 2,
OV2680_HORIZONTAL_OUTPUT_SIZE_H, &reg_val);
if (ret)
return ret;
buf->output_width = reg_val;
ret = ov2680_read_reg(client, 2,
OV2680_VERTICAL_OUTPUT_SIZE_H, &reg_val);
if (ret)
return ret;
buf->output_height = reg_val;
buf->binning_factor_x = res->bin_factor_x ?
(res->bin_factor_x * 2) : 1;
buf->binning_factor_y = res->bin_factor_y ?
(res->bin_factor_y * 2) : 1;
return 0;
}
static long __ov2680_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
int gain, int digitgain)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov2680_device *dev = to_ov2680_sensor(sd);
u16 vts;
int ret, exp_val;
dev_dbg(&client->dev,
"+++++++__ov2680_set_exposure coarse_itg %d, gain %d, digitgain %d++\n",
coarse_itg, gain, digitgain);
vts = dev->res->lines_per_frame;
/* group hold */
ret = ov2680_write_reg(client, 1,
OV2680_GROUP_ACCESS, 0x00);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_GROUP_ACCESS);
return ret;
}
/* Increase the VTS to match exposure + MARGIN */
if (coarse_itg > vts - OV2680_INTEGRATION_TIME_MARGIN)
vts = (u16)coarse_itg + OV2680_INTEGRATION_TIME_MARGIN;
ret = ov2680_write_reg(client, 2, OV2680_TIMING_VTS_H, vts);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_TIMING_VTS_H);
return ret;
}
/* set exposure */
/* Lower four bit should be 0*/
exp_val = coarse_itg << 4;
ret = ov2680_write_reg(client, 1,
OV2680_EXPOSURE_L, exp_val & 0xFF);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_EXPOSURE_L);
return ret;
}
ret = ov2680_write_reg(client, 1,
OV2680_EXPOSURE_M, (exp_val >> 8) & 0xFF);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_EXPOSURE_M);
return ret;
}
ret = ov2680_write_reg(client, 1,
OV2680_EXPOSURE_H, (exp_val >> 16) & 0x0F);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_EXPOSURE_H);
return ret;
}
/* Analog gain */
ret = ov2680_write_reg(client, 2, OV2680_AGC_H, gain);
if (ret) {
dev_err(&client->dev, "%s: write 0x%02x: error, aborted\n",
__func__, OV2680_AGC_H);
return ret;
}
/* Digital gain */
if (digitgain) {
ret = ov2680_write_reg(client, 2,
OV2680_MWB_RED_GAIN_H, digitgain);
if (ret) {
dev_err(&client->dev,
"%s: write 0x%02x: error, aborted\n",
__func__, OV2680_MWB_RED_GAIN_H);
return ret;
}
ret = ov2680_write_reg(client, 2,
OV2680_MWB_GREEN_GAIN_H, digitgain);
if (ret) {
dev_err(&client->dev,
"%s: write 0x%02x: error, aborted\n",
__func__, OV2680_MWB_RED_GAIN_H);
return ret;
}
ret = ov2680_write_reg(client, 2,
OV2680_MWB_BLUE_GAIN_H, digitgain);
if (ret) {
dev_err(&client->dev,
"%s: write 0x%02x: error, aborted\n",
__func__, OV2680_MWB_RED_GAIN_H);
return ret;
}
}
/* End group */
ret = ov2680_write_reg(client, 1,
OV2680_GROUP_ACCESS, 0x10);
if (ret)
return ret;
/* Delay launch group */
ret = ov2680_write_reg(client, 1,
OV2680_GROUP_ACCESS, 0xa0);
if (ret)
return ret;
return ret;
}
static int ov2680_set_exposure(struct v4l2_subdev *sd, int exposure,
int gain, int digitgain)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
int ret = 0;
mutex_lock(&dev->input_lock);
dev->exposure = exposure;
dev->gain = gain;
dev->digitgain = digitgain;
if (dev->power_on)
ret = __ov2680_set_exposure(sd, exposure, gain, digitgain);
mutex_unlock(&dev->input_lock);
return ret;
}
static long ov2680_s_exposure(struct v4l2_subdev *sd,
struct atomisp_exposure *exposure)
{
u16 coarse_itg = exposure->integration_time[0];
u16 analog_gain = exposure->gain[0];
u16 digital_gain = exposure->gain[1];
/* we should not accept the invalid value below */
if (analog_gain == 0) {
struct i2c_client *client = v4l2_get_subdevdata(sd);
v4l2_err(client, "%s: invalid value\n", __func__);
return -EINVAL;
}
return ov2680_set_exposure(sd, coarse_itg, analog_gain, digital_gain);
}
static long ov2680_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
switch (cmd) {
case ATOMISP_IOC_S_EXPOSURE:
return ov2680_s_exposure(sd, arg);
default:
return -EINVAL;
}
return 0;
}
/*
* This returns the exposure time being used. This should only be used
* for filling in EXIF data, not for actual image processing.
*/
static int ov2680_q_exposure(struct v4l2_subdev *sd, s32 *value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u32 reg_val;
int ret;
/* get exposure */
ret = ov2680_read_reg(client, 3, OV2680_EXPOSURE_H, &reg_val);
if (ret)
return ret;
/* Lower four bits are not part of the exposure val (always 0) */
*value = reg_val >> 4;
return 0;
}
static int ov2680_v_flip(struct v4l2_subdev *sd, s32 value)
{
struct camera_mipi_info *ov2680_info = NULL;
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
u32 val;
u8 index;
dev_dbg(&client->dev, "@%s: value:%d\n", __func__, value);
ret = ov2680_read_reg(client, 1, OV2680_FLIP_REG, &val);
if (ret)
return ret;
if (value)
val |= OV2680_FLIP_MIRROR_BIT_ENABLE;
else
val &= ~OV2680_FLIP_MIRROR_BIT_ENABLE;
ret = ov2680_write_reg(client, 1,
OV2680_FLIP_REG, val);
if (ret)
return ret;
index = (v_flag > 0 ? OV2680_FLIP_BIT : 0) | (h_flag > 0 ? OV2680_MIRROR_BIT :
0);
ov2680_info = v4l2_get_subdev_hostdata(sd);
if (ov2680_info) {
ov2680_info->raw_bayer_order = ov2680_bayer_order_mapping[index];
}
return ret;
}
static int ov2680_h_flip(struct v4l2_subdev *sd, s32 value)
{
struct camera_mipi_info *ov2680_info = NULL;
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
u32 val;
u8 index;
dev_dbg(&client->dev, "@%s: value:%d\n", __func__, value);
ret = ov2680_read_reg(client, 1, OV2680_MIRROR_REG, &val);
if (ret)
return ret;
if (value)
val |= OV2680_FLIP_MIRROR_BIT_ENABLE;
else
val &= ~OV2680_FLIP_MIRROR_BIT_ENABLE;
ret = ov2680_write_reg(client, 1,
OV2680_MIRROR_REG, val);
if (ret)
return ret;
index = (v_flag > 0 ? OV2680_FLIP_BIT : 0) | (h_flag > 0 ? OV2680_MIRROR_BIT :
0);
ov2680_info = v4l2_get_subdev_hostdata(sd);
if (ov2680_info) {
ov2680_info->raw_bayer_order = ov2680_bayer_order_mapping[index];
}
return ret;
}
static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov2680_device *dev =
container_of(ctrl->handler, struct ov2680_device, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&dev->sd);
int ret = 0;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
dev_dbg(&client->dev, "%s: CID_VFLIP:%d.\n",
__func__, ctrl->val);
ret = ov2680_v_flip(&dev->sd, ctrl->val);
break;
case V4L2_CID_HFLIP:
dev_dbg(&client->dev, "%s: CID_HFLIP:%d.\n",
__func__, ctrl->val);
ret = ov2680_h_flip(&dev->sd, ctrl->val);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int ov2680_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov2680_device *dev =
container_of(ctrl->handler, struct ov2680_device, ctrl_handler);
int ret = 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE_ABSOLUTE:
ret = ov2680_q_exposure(&dev->sd, &ctrl->val);
break;
case V4L2_CID_FOCAL_ABSOLUTE:
ret = ov2680_g_focal(&dev->sd, &ctrl->val);
break;
case V4L2_CID_FNUMBER_ABSOLUTE:
ret = ov2680_g_fnumber(&dev->sd, &ctrl->val);
break;
case V4L2_CID_FNUMBER_RANGE:
ret = ov2680_g_fnumber_range(&dev->sd, &ctrl->val);
break;
case V4L2_CID_BIN_FACTOR_HORZ:
ret = ov2680_g_bin_factor_x(&dev->sd, &ctrl->val);
break;
case V4L2_CID_BIN_FACTOR_VERT:
ret = ov2680_g_bin_factor_y(&dev->sd, &ctrl->val);
break;
default:
ret = -EINVAL;
}
return ret;
}
static const struct v4l2_ctrl_ops ctrl_ops = {
.s_ctrl = ov2680_s_ctrl,
.g_volatile_ctrl = ov2680_g_volatile_ctrl
};
static const struct v4l2_ctrl_config ov2680_controls[] = {
{
.ops = &ctrl_ops,
.id = V4L2_CID_EXPOSURE_ABSOLUTE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "exposure",
.min = 0x0,
.max = 0xffff,
.step = 0x01,
.def = 0x00,
.flags = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_FOCAL_ABSOLUTE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "focal length",
.min = OV2680_FOCAL_LENGTH_DEFAULT,
.max = OV2680_FOCAL_LENGTH_DEFAULT,
.step = 0x01,
.def = OV2680_FOCAL_LENGTH_DEFAULT,
.flags = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_FNUMBER_ABSOLUTE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "f-number",
.min = OV2680_F_NUMBER_DEFAULT,
.max = OV2680_F_NUMBER_DEFAULT,
.step = 0x01,
.def = OV2680_F_NUMBER_DEFAULT,
.flags = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_FNUMBER_RANGE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "f-number range",
.min = OV2680_F_NUMBER_RANGE,
.max = OV2680_F_NUMBER_RANGE,
.step = 0x01,
.def = OV2680_F_NUMBER_RANGE,
.flags = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_BIN_FACTOR_HORZ,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "horizontal binning factor",
.min = 0,
.max = OV2680_BIN_FACTOR_MAX,
.step = 1,
.def = 0,
.flags = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_BIN_FACTOR_VERT,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "vertical binning factor",
.min = 0,
.max = OV2680_BIN_FACTOR_MAX,
.step = 1,
.def = 0,
.flags = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_VFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip",
.min = 0,
.max = 1,
.step = 1,
.def = 0,
},
{
.ops = &ctrl_ops,
.id = V4L2_CID_HFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Mirror",
.min = 0,
.max = 1,
.step = 1,
.def = 0,
},
};
static int ov2680_init_registers(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
ret = ov2680_write_reg(client, 1, OV2680_SW_RESET, 0x01);
ret |= ov2680_write_reg_array(client, ov2680_global_setting);
return ret;
}
static int power_ctrl(struct v4l2_subdev *sd, bool flag)
{
int ret = 0;
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (!dev || !dev->platform_data)
return -ENODEV;
dev_dbg(&client->dev, "%s: %s", __func__, flag ? "on" : "off");
if (flag) {
ret |= dev->platform_data->v1p8_ctrl(sd, 1);
ret |= dev->platform_data->v2p8_ctrl(sd, 1);
usleep_range(10000, 15000);
}
if (!flag || ret) {
ret |= dev->platform_data->v1p8_ctrl(sd, 0);
ret |= dev->platform_data->v2p8_ctrl(sd, 0);
}
return ret;
}
static int gpio_ctrl(struct v4l2_subdev *sd, bool flag)
{
int ret;
struct ov2680_device *dev = to_ov2680_sensor(sd);
if (!dev || !dev->platform_data)
return -ENODEV;
/*
* The OV2680 documents only one GPIO input (#XSHUTDN), but
* existing integrations often wire two (reset/power_down)
* because that is the way other sensors work. There is no
* way to tell how it is wired internally, so existing
* firmwares expose both and we drive them symmetrically.
*/
if (flag) {
ret = dev->platform_data->gpio0_ctrl(sd, 1);
usleep_range(10000, 15000);
/* Ignore return from second gpio, it may not be there */
dev->platform_data->gpio1_ctrl(sd, 1);
usleep_range(10000, 15000);
} else {
dev->platform_data->gpio1_ctrl(sd, 0);
ret = dev->platform_data->gpio0_ctrl(sd, 0);
}
return ret;
}
static int power_up(struct v4l2_subdev *sd)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
if (!dev->platform_data) {
dev_err(&client->dev,
"no camera_sensor_platform_data");
return -ENODEV;
}
if (dev->power_on)
return 0; /* Already on */
/* power control */
ret = power_ctrl(sd, 1);
if (ret)
goto fail_power;
/* according to DS, at least 5ms is needed between DOVDD and PWDN */
usleep_range(5000, 6000);
/* gpio ctrl */
ret = gpio_ctrl(sd, 1);
if (ret) {
ret = gpio_ctrl(sd, 1);
if (ret)
goto fail_power;
}
/* flis clock control */
ret = dev->platform_data->flisclk_ctrl(sd, 1);
if (ret)
goto fail_clk;
/* according to DS, 20ms is needed between PWDN and i2c access */
msleep(20);
ret = ov2680_init_registers(sd);
if (ret)
goto fail_init_registers;
ret = __ov2680_set_exposure(sd, dev->exposure, dev->gain, dev->digitgain);
if (ret)
goto fail_init_registers;
dev->power_on = true;
return 0;
fail_init_registers:
dev->platform_data->flisclk_ctrl(sd, 0);
fail_clk:
gpio_ctrl(sd, 0);
fail_power:
power_ctrl(sd, 0);
dev_err(&client->dev, "sensor power-up failed\n");
return ret;
}
static int power_down(struct v4l2_subdev *sd)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
h_flag = 0;
v_flag = 0;
if (!dev->platform_data) {
dev_err(&client->dev,
"no camera_sensor_platform_data");
return -ENODEV;
}
if (!dev->power_on)
return 0; /* Already off */
ret = dev->platform_data->flisclk_ctrl(sd, 0);
if (ret)
dev_err(&client->dev, "flisclk failed\n");
/* gpio ctrl */
ret = gpio_ctrl(sd, 0);
if (ret) {
ret = gpio_ctrl(sd, 0);
if (ret)
dev_err(&client->dev, "gpio failed 2\n");
}
/* power control */
ret = power_ctrl(sd, 0);
if (ret) {
dev_err(&client->dev, "vprog failed.\n");
return ret;
}
dev->power_on = false;
return 0;
}
static int ov2680_s_power(struct v4l2_subdev *sd, int on)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
int ret;
mutex_lock(&dev->input_lock);
if (on == 0) {
ret = power_down(sd);
} else {
ret = power_up(sd);
}
mutex_unlock(&dev->input_lock);
return ret;
}
static int ov2680_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *fmt = &format->format;
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct camera_mipi_info *ov2680_info = NULL;
struct ov2680_resolution *res;
int vts, ret = 0;
dev_dbg(&client->dev, "%s: %s: pad: %d, fmt: %p\n",
__func__,
(format->which == V4L2_SUBDEV_FORMAT_TRY) ? "try" : "set",
format->pad, fmt);
if (format->pad)
return -EINVAL;
if (!fmt)
return -EINVAL;
ov2680_info = v4l2_get_subdev_hostdata(sd);
if (!ov2680_info)
return -EINVAL;
res = v4l2_find_nearest_size(ov2680_res_preview,
ARRAY_SIZE(ov2680_res_preview), width,
height, fmt->width, fmt->height);
if (!res)
res = &ov2680_res_preview[N_RES_PREVIEW - 1];
fmt->width = res->width;
fmt->height = res->height;
fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
sd_state->pads->try_fmt = *fmt;
return 0;
}
dev_dbg(&client->dev, "%s: %dx%d\n",
__func__, fmt->width, fmt->height);
mutex_lock(&dev->input_lock);
/* s_power has not been called yet for std v4l2 clients (camorama) */
power_up(sd);
ret = ov2680_write_reg_array(client, dev->res->regs);
if (ret) {
dev_err(&client->dev,
"ov2680 write resolution register err: %d\n", ret);
goto err;
}
vts = dev->res->lines_per_frame;
/* If necessary increase the VTS to match exposure + MARGIN */
if (dev->exposure > vts - OV2680_INTEGRATION_TIME_MARGIN)
vts = dev->exposure + OV2680_INTEGRATION_TIME_MARGIN;
ret = ov2680_write_reg(client, 2, OV2680_TIMING_VTS_H, vts);
if (ret) {
dev_err(&client->dev, "ov2680 write vts err: %d\n", ret);
goto err;
}
ret = ov2680_get_intg_factor(client, ov2680_info, res);
if (ret) {
dev_err(&client->dev, "failed to get integration factor\n");
goto err;
}
/*
* recall flip functions to avoid flip registers
* were overridden by default setting
*/
if (h_flag)
ov2680_h_flip(sd, h_flag);
if (v_flag)
ov2680_v_flip(sd, v_flag);
dev->res = res;
err:
mutex_unlock(&dev->input_lock);
return ret;
}
static int ov2680_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *fmt = &format->format;
struct ov2680_device *dev = to_ov2680_sensor(sd);
if (format->pad)
return -EINVAL;
if (!fmt)
return -EINVAL;
fmt->width = dev->res->width;
fmt->height = dev->res->height;
fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov2680_detect(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
u32 high, low;
int ret;
u16 id;
u8 revision;
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
return -ENODEV;
ret = ov2680_read_reg(client, 1,
OV2680_SC_CMMN_CHIP_ID_H, &high);
if (ret) {
dev_err(&client->dev, "sensor_id_high = 0x%x\n", high);
return -ENODEV;
}
ret = ov2680_read_reg(client, 1,
OV2680_SC_CMMN_CHIP_ID_L, &low);
id = ((((u16)high) << 8) | (u16)low);
if (id != OV2680_ID) {
dev_err(&client->dev, "sensor ID error 0x%x\n", id);
return -ENODEV;
}
ret = ov2680_read_reg(client, 1,
OV2680_SC_CMMN_SUB_ID, &high);
revision = (u8)high & 0x0f;
dev_info(&client->dev, "sensor_revision id = 0x%x, rev= %d\n",
id, revision);
return 0;
}
static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
mutex_lock(&dev->input_lock);
if (enable)
dev_dbg(&client->dev, "ov2680_s_stream one\n");
else
dev_dbg(&client->dev, "ov2680_s_stream off\n");
ret = ov2680_write_reg(client, 1, OV2680_SW_STREAM,
enable ? OV2680_START_STREAMING :
OV2680_STOP_STREAMING);
//otp valid at stream on state
//if(!dev->otp_data)
// dev->otp_data = ov2680_otp_read(sd);
mutex_unlock(&dev->input_lock);
return ret;
}
static int ov2680_s_config(struct v4l2_subdev *sd,
int irq, void *platform_data)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
if (!platform_data)
return -ENODEV;
dev->platform_data =
(struct camera_sensor_platform_data *)platform_data;
mutex_lock(&dev->input_lock);
ret = power_up(sd);
if (ret) {
dev_err(&client->dev, "ov2680 power-up err.\n");
goto fail_power_on;
}
ret = dev->platform_data->csi_cfg(sd, 1);
if (ret)
goto fail_csi_cfg;
/* config & detect sensor */
ret = ov2680_detect(client);
if (ret) {
dev_err(&client->dev, "ov2680_detect err s_config.\n");
goto fail_csi_cfg;
}
/* turn off sensor, after probed */
ret = power_down(sd);
if (ret) {
dev_err(&client->dev, "ov2680 power-off err.\n");
goto fail_csi_cfg;
}
mutex_unlock(&dev->input_lock);
return 0;
fail_csi_cfg:
dev->platform_data->csi_cfg(sd, 0);
fail_power_on:
power_down(sd);
dev_err(&client->dev, "sensor power-gating failed\n");
mutex_unlock(&dev->input_lock);
return ret;
}
static int ov2680_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *interval)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
interval->interval.numerator = 1;
interval->interval.denominator = dev->res->fps;
return 0;
}
static int ov2680_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index >= MAX_FMTS)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov2680_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
int index = fse->index;
if (index >= N_RES_PREVIEW)
return -EINVAL;
fse->min_width = ov2680_res_preview[index].width;
fse->min_height = ov2680_res_preview[index].height;
fse->max_width = ov2680_res_preview[index].width;
fse->max_height = ov2680_res_preview[index].height;
return 0;
}
static int ov2680_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_interval_enum *fie)
{
struct v4l2_fract fract;
if (fie->index >= N_RES_PREVIEW ||
fie->width > ov2680_res_preview[0].width ||
fie->height > ov2680_res_preview[0].height ||
fie->which > V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
fract.denominator = ov2680_res_preview[fie->index].fps;
fract.numerator = 1;
fie->interval = fract;
return 0;
}
static int ov2680_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
{
struct ov2680_device *dev = to_ov2680_sensor(sd);
mutex_lock(&dev->input_lock);
*frames = dev->res->skip_frames;
mutex_unlock(&dev->input_lock);
return 0;
}
static const struct v4l2_subdev_video_ops ov2680_video_ops = {
.s_stream = ov2680_s_stream,
.g_frame_interval = ov2680_g_frame_interval,
};
static const struct v4l2_subdev_sensor_ops ov2680_sensor_ops = {
.g_skip_frames = ov2680_g_skip_frames,
};
static const struct v4l2_subdev_core_ops ov2680_core_ops = {
.s_power = ov2680_s_power,
.ioctl = ov2680_ioctl,
};
static const struct v4l2_subdev_pad_ops ov2680_pad_ops = {
.enum_mbus_code = ov2680_enum_mbus_code,
.enum_frame_size = ov2680_enum_frame_size,
.enum_frame_interval = ov2680_enum_frame_interval,
.get_fmt = ov2680_get_fmt,
.set_fmt = ov2680_set_fmt,
};
static const struct v4l2_subdev_ops ov2680_ops = {
.core = &ov2680_core_ops,
.video = &ov2680_video_ops,
.pad = &ov2680_pad_ops,
.sensor = &ov2680_sensor_ops,
};
static void ov2680_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov2680_device *dev = to_ov2680_sensor(sd);
dev_dbg(&client->dev, "ov2680_remove...\n");
dev->platform_data->csi_cfg(sd, 0);
v4l2_device_unregister_subdev(sd);
media_entity_cleanup(&dev->sd.entity);
v4l2_ctrl_handler_free(&dev->ctrl_handler);
kfree(dev);
}
static int ov2680_probe(struct i2c_client *client)
{
struct ov2680_device *dev;
int ret;
void *pdata;
unsigned int i;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
mutex_init(&dev->input_lock);
dev->res = &ov2680_res_preview[0];
dev->exposure = dev->res->lines_per_frame - OV2680_INTEGRATION_TIME_MARGIN;
dev->gain = 250; /* 0-2047 */
v4l2_i2c_subdev_init(&dev->sd, client, &ov2680_ops);
pdata = gmin_camera_platform_data(&dev->sd,
ATOMISP_INPUT_FORMAT_RAW_10,
atomisp_bayer_order_bggr);
if (!pdata) {
ret = -EINVAL;
goto out_free;
}
ret = ov2680_s_config(&dev->sd, client->irq, pdata);
if (ret)
goto out_free;
ret = atomisp_register_i2c_module(&dev->sd, pdata, RAW_CAMERA);
if (ret)
goto out_free;
dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
dev->pad.flags = MEDIA_PAD_FL_SOURCE;
dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret =
v4l2_ctrl_handler_init(&dev->ctrl_handler,
ARRAY_SIZE(ov2680_controls));
if (ret) {
ov2680_remove(client);
return ret;
}
for (i = 0; i < ARRAY_SIZE(ov2680_controls); i++)
v4l2_ctrl_new_custom(&dev->ctrl_handler, &ov2680_controls[i],
NULL);
if (dev->ctrl_handler.error) {
ov2680_remove(client);
return dev->ctrl_handler.error;
}
/* Use same lock for controls as for everything else. */
dev->ctrl_handler.lock = &dev->input_lock;
dev->sd.ctrl_handler = &dev->ctrl_handler;
ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);
if (ret) {
ov2680_remove(client);
dev_dbg(&client->dev, "+++ remove ov2680\n");
}
return ret;
out_free:
dev_dbg(&client->dev, "+++ out free\n");
v4l2_device_unregister_subdev(&dev->sd);
kfree(dev);
return ret;
}
static const struct acpi_device_id ov2680_acpi_match[] = {
{"XXOV2680"},
{"OVTI2680"},
{},
};
MODULE_DEVICE_TABLE(acpi, ov2680_acpi_match);
static struct i2c_driver ov2680_driver = {
.driver = {
.name = "ov2680",
.acpi_match_table = ov2680_acpi_match,
},
.probe_new = ov2680_probe,
.remove = ov2680_remove,
};
module_i2c_driver(ov2680_driver);
MODULE_AUTHOR("Jacky Wang <Jacky_wang@ovt.com>");
MODULE_DESCRIPTION("A low-level driver for OmniVision 2680 sensors");
MODULE_LICENSE("GPL");