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linux-zen-server/drivers/media/i2c/imx208.c

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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2021 Intel Corporation
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <asm/unaligned.h>
#define IMX208_REG_MODE_SELECT 0x0100
#define IMX208_MODE_STANDBY 0x00
#define IMX208_MODE_STREAMING 0x01
/* Chip ID */
#define IMX208_REG_CHIP_ID 0x0000
#define IMX208_CHIP_ID 0x0208
/* V_TIMING internal */
#define IMX208_REG_VTS 0x0340
#define IMX208_VTS_60FPS 0x0472
#define IMX208_VTS_BINNING 0x0239
#define IMX208_VTS_60FPS_MIN 0x0458
#define IMX208_VTS_BINNING_MIN 0x0230
#define IMX208_VTS_MAX 0xffff
/* HBLANK control - read only */
#define IMX208_PPL_384MHZ 2248
#define IMX208_PPL_96MHZ 2248
/* Exposure control */
#define IMX208_REG_EXPOSURE 0x0202
#define IMX208_EXPOSURE_MIN 4
#define IMX208_EXPOSURE_STEP 1
#define IMX208_EXPOSURE_DEFAULT 0x190
#define IMX208_EXPOSURE_MAX 65535
/* Analog gain control */
#define IMX208_REG_ANALOG_GAIN 0x0204
#define IMX208_ANA_GAIN_MIN 0
#define IMX208_ANA_GAIN_MAX 0x00e0
#define IMX208_ANA_GAIN_STEP 1
#define IMX208_ANA_GAIN_DEFAULT 0x0
/* Digital gain control */
#define IMX208_REG_GR_DIGITAL_GAIN 0x020e
#define IMX208_REG_R_DIGITAL_GAIN 0x0210
#define IMX208_REG_B_DIGITAL_GAIN 0x0212
#define IMX208_REG_GB_DIGITAL_GAIN 0x0214
#define IMX208_DIGITAL_GAIN_SHIFT 8
/* Orientation */
#define IMX208_REG_ORIENTATION_CONTROL 0x0101
/* Test Pattern Control */
#define IMX208_REG_TEST_PATTERN_MODE 0x0600
#define IMX208_TEST_PATTERN_DISABLE 0x0
#define IMX208_TEST_PATTERN_SOLID_COLOR 0x1
#define IMX208_TEST_PATTERN_COLOR_BARS 0x2
#define IMX208_TEST_PATTERN_GREY_COLOR 0x3
#define IMX208_TEST_PATTERN_PN9 0x4
#define IMX208_TEST_PATTERN_FIX_1 0x100
#define IMX208_TEST_PATTERN_FIX_2 0x101
#define IMX208_TEST_PATTERN_FIX_3 0x102
#define IMX208_TEST_PATTERN_FIX_4 0x103
#define IMX208_TEST_PATTERN_FIX_5 0x104
#define IMX208_TEST_PATTERN_FIX_6 0x105
/* OTP Access */
#define IMX208_OTP_BASE 0x3500
#define IMX208_OTP_SIZE 40
struct imx208_reg {
u16 address;
u8 val;
};
struct imx208_reg_list {
u32 num_of_regs;
const struct imx208_reg *regs;
};
/* Link frequency config */
struct imx208_link_freq_config {
u32 pixels_per_line;
/* PLL registers for this link frequency */
struct imx208_reg_list reg_list;
};
/* Mode : resolution and related config&values */
struct imx208_mode {
/* Frame width */
u32 width;
/* Frame height */
u32 height;
/* V-timing */
u32 vts_def;
u32 vts_min;
/* Index of Link frequency config to be used */
u32 link_freq_index;
/* Default register values */
struct imx208_reg_list reg_list;
};
static const struct imx208_reg pll_ctrl_reg[] = {
{0x0305, 0x02},
{0x0307, 0x50},
{0x303C, 0x3C},
};
static const struct imx208_reg mode_1936x1096_60fps_regs[] = {
{0x0340, 0x04},
{0x0341, 0x72},
{0x0342, 0x04},
{0x0343, 0x64},
{0x034C, 0x07},
{0x034D, 0x90},
{0x034E, 0x04},
{0x034F, 0x48},
{0x0381, 0x01},
{0x0383, 0x01},
{0x0385, 0x01},
{0x0387, 0x01},
{0x3048, 0x00},
{0x3050, 0x01},
{0x30D5, 0x00},
{0x3301, 0x00},
{0x3318, 0x62},
{0x0202, 0x01},
{0x0203, 0x90},
{0x0205, 0x00},
};
static const struct imx208_reg mode_968_548_60fps_regs[] = {
{0x0340, 0x02},
{0x0341, 0x39},
{0x0342, 0x08},
{0x0343, 0xC8},
{0x034C, 0x03},
{0x034D, 0xC8},
{0x034E, 0x02},
{0x034F, 0x24},
{0x0381, 0x01},
{0x0383, 0x03},
{0x0385, 0x01},
{0x0387, 0x03},
{0x3048, 0x01},
{0x3050, 0x02},
{0x30D5, 0x03},
{0x3301, 0x10},
{0x3318, 0x75},
{0x0202, 0x01},
{0x0203, 0x90},
{0x0205, 0x00},
};
static const s64 imx208_discrete_digital_gain[] = {
1, 2, 4, 8, 16,
};
static const char * const imx208_test_pattern_menu[] = {
"Disabled",
"Solid Color",
"100% Color Bar",
"Fade to Grey Color Bar",
"PN9",
"Fixed Pattern1",
"Fixed Pattern2",
"Fixed Pattern3",
"Fixed Pattern4",
"Fixed Pattern5",
"Fixed Pattern6"
};
static const int imx208_test_pattern_val[] = {
IMX208_TEST_PATTERN_DISABLE,
IMX208_TEST_PATTERN_SOLID_COLOR,
IMX208_TEST_PATTERN_COLOR_BARS,
IMX208_TEST_PATTERN_GREY_COLOR,
IMX208_TEST_PATTERN_PN9,
IMX208_TEST_PATTERN_FIX_1,
IMX208_TEST_PATTERN_FIX_2,
IMX208_TEST_PATTERN_FIX_3,
IMX208_TEST_PATTERN_FIX_4,
IMX208_TEST_PATTERN_FIX_5,
IMX208_TEST_PATTERN_FIX_6,
};
/* Configurations for supported link frequencies */
#define IMX208_MHZ (1000 * 1000ULL)
#define IMX208_LINK_FREQ_384MHZ (384ULL * IMX208_MHZ)
#define IMX208_LINK_FREQ_96MHZ (96ULL * IMX208_MHZ)
#define IMX208_DATA_RATE_DOUBLE 2
#define IMX208_NUM_OF_LANES 2
#define IMX208_PIXEL_BITS 10
enum {
IMX208_LINK_FREQ_384MHZ_INDEX,
IMX208_LINK_FREQ_96MHZ_INDEX,
};
/*
* pixel_rate = link_freq * data-rate * nr_of_lanes / bits_per_sample
* data rate => double data rate; number of lanes => 2; bits per pixel => 10
*/
static u64 link_freq_to_pixel_rate(u64 f)
{
f *= IMX208_DATA_RATE_DOUBLE * IMX208_NUM_OF_LANES;
do_div(f, IMX208_PIXEL_BITS);
return f;
}
/* Menu items for LINK_FREQ V4L2 control */
static const s64 link_freq_menu_items[] = {
[IMX208_LINK_FREQ_384MHZ_INDEX] = IMX208_LINK_FREQ_384MHZ,
[IMX208_LINK_FREQ_96MHZ_INDEX] = IMX208_LINK_FREQ_96MHZ,
};
/* Link frequency configs */
static const struct imx208_link_freq_config link_freq_configs[] = {
[IMX208_LINK_FREQ_384MHZ_INDEX] = {
.pixels_per_line = IMX208_PPL_384MHZ,
.reg_list = {
.num_of_regs = ARRAY_SIZE(pll_ctrl_reg),
.regs = pll_ctrl_reg,
}
},
[IMX208_LINK_FREQ_96MHZ_INDEX] = {
.pixels_per_line = IMX208_PPL_96MHZ,
.reg_list = {
.num_of_regs = ARRAY_SIZE(pll_ctrl_reg),
.regs = pll_ctrl_reg,
}
},
};
/* Mode configs */
static const struct imx208_mode supported_modes[] = {
{
.width = 1936,
.height = 1096,
.vts_def = IMX208_VTS_60FPS,
.vts_min = IMX208_VTS_60FPS_MIN,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_1936x1096_60fps_regs),
.regs = mode_1936x1096_60fps_regs,
},
.link_freq_index = IMX208_LINK_FREQ_384MHZ_INDEX,
},
{
.width = 968,
.height = 548,
.vts_def = IMX208_VTS_BINNING,
.vts_min = IMX208_VTS_BINNING_MIN,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_968_548_60fps_regs),
.regs = mode_968_548_60fps_regs,
},
.link_freq_index = IMX208_LINK_FREQ_96MHZ_INDEX,
},
};
struct imx208 {
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_ctrl_handler ctrl_handler;
/* V4L2 Controls */
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vflip;
struct v4l2_ctrl *hflip;
/* Current mode */
const struct imx208_mode *cur_mode;
/*
* Mutex for serialized access:
* Protect sensor set pad format and start/stop streaming safely.
* Protect access to sensor v4l2 controls.
*/
struct mutex imx208_mx;
/* Streaming on/off */
bool streaming;
/* OTP data */
bool otp_read;
char otp_data[IMX208_OTP_SIZE];
/* True if the device has been identified */
bool identified;
};
static inline struct imx208 *to_imx208(struct v4l2_subdev *_sd)
{
return container_of(_sd, struct imx208, sd);
}
/* Get bayer order based on flip setting. */
static u32 imx208_get_format_code(struct imx208 *imx208)
{
/*
* Only one bayer order is supported.
* It depends on the flip settings.
*/
static const u32 codes[2][2] = {
{ MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, },
{ MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, },
};
return codes[imx208->vflip->val][imx208->hflip->val];
}
/* Read registers up to 4 at a time */
static int imx208_read_reg(struct imx208 *imx208, u16 reg, u32 len, u32 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
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;
/* Write register address */
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = ARRAY_SIZE(addr_buf);
msgs[0].buf = addr_buf;
/* Read data from register */
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))
return -EIO;
*val = get_unaligned_be32(data_buf);
return 0;
}
/* Write registers up to 4 at a time */
static int imx208_write_reg(struct imx208 *imx208, u16 reg, u32 len, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
u8 buf[6];
if (len > 4)
return -EINVAL;
put_unaligned_be16(reg, buf);
put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
if (i2c_master_send(client, buf, len + 2) != len + 2)
return -EIO;
return 0;
}
/* Write a list of registers */
static int imx208_write_regs(struct imx208 *imx208,
const struct imx208_reg *regs, u32 len)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
unsigned int i;
int ret;
for (i = 0; i < len; i++) {
ret = imx208_write_reg(imx208, regs[i].address, 1,
regs[i].val);
if (ret) {
dev_err_ratelimited(&client->dev,
"Failed to write reg 0x%4.4x. error = %d\n",
regs[i].address, ret);
return ret;
}
}
return 0;
}
/* Open sub-device */
static int imx208_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_mbus_framefmt *try_fmt =
v4l2_subdev_get_try_format(sd, fh->state, 0);
/* Initialize try_fmt */
try_fmt->width = supported_modes[0].width;
try_fmt->height = supported_modes[0].height;
try_fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
try_fmt->field = V4L2_FIELD_NONE;
return 0;
}
static int imx208_update_digital_gain(struct imx208 *imx208, u32 len, u32 val)
{
int ret;
val = imx208_discrete_digital_gain[val] << IMX208_DIGITAL_GAIN_SHIFT;
ret = imx208_write_reg(imx208, IMX208_REG_GR_DIGITAL_GAIN, 2, val);
if (ret)
return ret;
ret = imx208_write_reg(imx208, IMX208_REG_GB_DIGITAL_GAIN, 2, val);
if (ret)
return ret;
ret = imx208_write_reg(imx208, IMX208_REG_R_DIGITAL_GAIN, 2, val);
if (ret)
return ret;
return imx208_write_reg(imx208, IMX208_REG_B_DIGITAL_GAIN, 2, val);
}
static int imx208_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct imx208 *imx208 =
container_of(ctrl->handler, struct imx208, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
int ret;
/*
* Applying V4L2 control value only happens
* when power is up for streaming
*/
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_ANALOGUE_GAIN:
ret = imx208_write_reg(imx208, IMX208_REG_ANALOG_GAIN,
2, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
ret = imx208_write_reg(imx208, IMX208_REG_EXPOSURE,
2, ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = imx208_update_digital_gain(imx208, 2, ctrl->val);
break;
case V4L2_CID_VBLANK:
/* Update VTS that meets expected vertical blanking */
ret = imx208_write_reg(imx208, IMX208_REG_VTS, 2,
imx208->cur_mode->height + ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = imx208_write_reg(imx208, IMX208_REG_TEST_PATTERN_MODE,
2, imx208_test_pattern_val[ctrl->val]);
break;
case V4L2_CID_HFLIP:
case V4L2_CID_VFLIP:
ret = imx208_write_reg(imx208, IMX208_REG_ORIENTATION_CONTROL,
1,
imx208->hflip->val |
imx208->vflip->val << 1);
break;
default:
ret = -EINVAL;
dev_err(&client->dev,
"ctrl(id:0x%x,val:0x%x) is not handled\n",
ctrl->id, ctrl->val);
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops imx208_ctrl_ops = {
.s_ctrl = imx208_set_ctrl,
};
static const struct v4l2_ctrl_config imx208_digital_gain_control = {
.ops = &imx208_ctrl_ops,
.id = V4L2_CID_DIGITAL_GAIN,
.name = "Digital Gain",
.type = V4L2_CTRL_TYPE_INTEGER_MENU,
.min = 0,
.max = ARRAY_SIZE(imx208_discrete_digital_gain) - 1,
.step = 0,
.def = 0,
.menu_skip_mask = 0,
.qmenu_int = imx208_discrete_digital_gain,
};
static int imx208_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct imx208 *imx208 = to_imx208(sd);
if (code->index > 0)
return -EINVAL;
code->code = imx208_get_format_code(imx208);
return 0;
}
static int imx208_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
struct imx208 *imx208 = to_imx208(sd);
if (fse->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fse->code != imx208_get_format_code(imx208))
return -EINVAL;
fse->min_width = supported_modes[fse->index].width;
fse->max_width = fse->min_width;
fse->min_height = supported_modes[fse->index].height;
fse->max_height = fse->min_height;
return 0;
}
static void imx208_mode_to_pad_format(struct imx208 *imx208,
const struct imx208_mode *mode,
struct v4l2_subdev_format *fmt)
{
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.code = imx208_get_format_code(imx208);
fmt->format.field = V4L2_FIELD_NONE;
}
static int __imx208_get_pad_format(struct imx208 *imx208,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
fmt->format = *v4l2_subdev_get_try_format(&imx208->sd,
sd_state,
fmt->pad);
else
imx208_mode_to_pad_format(imx208, imx208->cur_mode, fmt);
return 0;
}
static int imx208_get_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct imx208 *imx208 = to_imx208(sd);
int ret;
mutex_lock(&imx208->imx208_mx);
ret = __imx208_get_pad_format(imx208, sd_state, fmt);
mutex_unlock(&imx208->imx208_mx);
return ret;
}
static int imx208_set_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct imx208 *imx208 = to_imx208(sd);
const struct imx208_mode *mode;
s32 vblank_def;
s32 vblank_min;
s64 h_blank;
s64 pixel_rate;
s64 link_freq;
mutex_lock(&imx208->imx208_mx);
fmt->format.code = imx208_get_format_code(imx208);
mode = v4l2_find_nearest_size(supported_modes,
ARRAY_SIZE(supported_modes), width, height,
fmt->format.width, fmt->format.height);
imx208_mode_to_pad_format(imx208, mode, fmt);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
*v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format;
} else {
imx208->cur_mode = mode;
__v4l2_ctrl_s_ctrl(imx208->link_freq, mode->link_freq_index);
link_freq = link_freq_menu_items[mode->link_freq_index];
pixel_rate = link_freq_to_pixel_rate(link_freq);
__v4l2_ctrl_s_ctrl_int64(imx208->pixel_rate, pixel_rate);
/* Update limits and set FPS to default */
vblank_def = imx208->cur_mode->vts_def -
imx208->cur_mode->height;
vblank_min = imx208->cur_mode->vts_min -
imx208->cur_mode->height;
__v4l2_ctrl_modify_range(imx208->vblank, vblank_min,
IMX208_VTS_MAX - imx208->cur_mode->height,
1, vblank_def);
__v4l2_ctrl_s_ctrl(imx208->vblank, vblank_def);
h_blank =
link_freq_configs[mode->link_freq_index].pixels_per_line
- imx208->cur_mode->width;
__v4l2_ctrl_modify_range(imx208->hblank, h_blank,
h_blank, 1, h_blank);
}
mutex_unlock(&imx208->imx208_mx);
return 0;
}
static int imx208_identify_module(struct imx208 *imx208)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
int ret;
u32 val;
if (imx208->identified)
return 0;
ret = imx208_read_reg(imx208, IMX208_REG_CHIP_ID,
2, &val);
if (ret) {
dev_err(&client->dev, "failed to read chip id %x\n",
IMX208_CHIP_ID);
return ret;
}
if (val != IMX208_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
IMX208_CHIP_ID, val);
return -EIO;
}
imx208->identified = true;
return 0;
}
/* Start streaming */
static int imx208_start_streaming(struct imx208 *imx208)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
const struct imx208_reg_list *reg_list;
int ret, link_freq_index;
ret = imx208_identify_module(imx208);
if (ret)
return ret;
/* Setup PLL */
link_freq_index = imx208->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = imx208_write_regs(imx208, reg_list->regs, reg_list->num_of_regs);
if (ret) {
dev_err(&client->dev, "%s failed to set plls\n", __func__);
return ret;
}
/* Apply default values of current mode */
reg_list = &imx208->cur_mode->reg_list;
ret = imx208_write_regs(imx208, reg_list->regs, reg_list->num_of_regs);
if (ret) {
dev_err(&client->dev, "%s failed to set mode\n", __func__);
return ret;
}
/* Apply customized values from user */
ret = __v4l2_ctrl_handler_setup(imx208->sd.ctrl_handler);
if (ret)
return ret;
/* set stream on register */
return imx208_write_reg(imx208, IMX208_REG_MODE_SELECT,
1, IMX208_MODE_STREAMING);
}
/* Stop streaming */
static int imx208_stop_streaming(struct imx208 *imx208)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
int ret;
/* set stream off register */
ret = imx208_write_reg(imx208, IMX208_REG_MODE_SELECT,
1, IMX208_MODE_STANDBY);
if (ret)
dev_err(&client->dev, "%s failed to set stream\n", __func__);
/*
* Return success even if it was an error, as there is nothing the
* caller can do about it.
*/
return 0;
}
static int imx208_set_stream(struct v4l2_subdev *sd, int enable)
{
struct imx208 *imx208 = to_imx208(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
mutex_lock(&imx208->imx208_mx);
if (imx208->streaming == enable) {
mutex_unlock(&imx208->imx208_mx);
return 0;
}
if (enable) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0)
goto err_rpm_put;
/*
* Apply default & customized values
* and then start streaming.
*/
ret = imx208_start_streaming(imx208);
if (ret)
goto err_rpm_put;
} else {
imx208_stop_streaming(imx208);
pm_runtime_put(&client->dev);
}
imx208->streaming = enable;
mutex_unlock(&imx208->imx208_mx);
/* vflip and hflip cannot change during streaming */
v4l2_ctrl_grab(imx208->vflip, enable);
v4l2_ctrl_grab(imx208->hflip, enable);
return ret;
err_rpm_put:
pm_runtime_put(&client->dev);
mutex_unlock(&imx208->imx208_mx);
return ret;
}
static int __maybe_unused imx208_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct imx208 *imx208 = to_imx208(sd);
if (imx208->streaming)
imx208_stop_streaming(imx208);
return 0;
}
static int __maybe_unused imx208_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct imx208 *imx208 = to_imx208(sd);
int ret;
if (imx208->streaming) {
ret = imx208_start_streaming(imx208);
if (ret)
goto error;
}
return 0;
error:
imx208_stop_streaming(imx208);
imx208->streaming = 0;
return ret;
}
/* Verify chip ID */
static const struct v4l2_subdev_video_ops imx208_video_ops = {
.s_stream = imx208_set_stream,
};
static const struct v4l2_subdev_pad_ops imx208_pad_ops = {
.enum_mbus_code = imx208_enum_mbus_code,
.get_fmt = imx208_get_pad_format,
.set_fmt = imx208_set_pad_format,
.enum_frame_size = imx208_enum_frame_size,
};
static const struct v4l2_subdev_ops imx208_subdev_ops = {
.video = &imx208_video_ops,
.pad = &imx208_pad_ops,
};
static const struct v4l2_subdev_internal_ops imx208_internal_ops = {
.open = imx208_open,
};
static int imx208_read_otp(struct imx208 *imx208)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
struct i2c_msg msgs[2];
u8 addr_buf[2] = { IMX208_OTP_BASE >> 8, IMX208_OTP_BASE & 0xff };
int ret = 0;
mutex_lock(&imx208->imx208_mx);
if (imx208->otp_read)
goto out_unlock;
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto out_unlock;
}
ret = imx208_identify_module(imx208);
if (ret)
goto out_pm_put;
/* Write register address */
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = ARRAY_SIZE(addr_buf);
msgs[0].buf = addr_buf;
/* Read data from registers */
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = sizeof(imx208->otp_data);
msgs[1].buf = imx208->otp_data;
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret == ARRAY_SIZE(msgs)) {
imx208->otp_read = true;
ret = 0;
}
out_pm_put:
pm_runtime_put(&client->dev);
out_unlock:
mutex_unlock(&imx208->imx208_mx);
return ret;
}
static ssize_t otp_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct i2c_client *client = to_i2c_client(kobj_to_dev(kobj));
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct imx208 *imx208 = to_imx208(sd);
int ret;
ret = imx208_read_otp(imx208);
if (ret)
return ret;
memcpy(buf, &imx208->otp_data[off], count);
return count;
}
static const BIN_ATTR_RO(otp, IMX208_OTP_SIZE);
/* Initialize control handlers */
static int imx208_init_controls(struct imx208 *imx208)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
struct v4l2_ctrl_handler *ctrl_hdlr = &imx208->ctrl_handler;
s64 exposure_max;
s64 vblank_def;
s64 vblank_min;
s64 pixel_rate_min;
s64 pixel_rate_max;
int ret;
ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
if (ret)
return ret;
mutex_init(&imx208->imx208_mx);
ctrl_hdlr->lock = &imx208->imx208_mx;
imx208->link_freq =
v4l2_ctrl_new_int_menu(ctrl_hdlr,
&imx208_ctrl_ops,
V4L2_CID_LINK_FREQ,
ARRAY_SIZE(link_freq_menu_items) - 1,
0, link_freq_menu_items);
if (imx208->link_freq)
imx208->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
pixel_rate_min =
link_freq_to_pixel_rate(link_freq_menu_items[ARRAY_SIZE(link_freq_menu_items) - 1]);
/* By default, PIXEL_RATE is read only */
imx208->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops,
V4L2_CID_PIXEL_RATE,
pixel_rate_min, pixel_rate_max,
1, pixel_rate_max);
vblank_def = imx208->cur_mode->vts_def - imx208->cur_mode->height;
vblank_min = imx208->cur_mode->vts_min - imx208->cur_mode->height;
imx208->vblank =
v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_VBLANK,
vblank_min,
IMX208_VTS_MAX - imx208->cur_mode->height, 1,
vblank_def);
imx208->hblank =
v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_HBLANK,
IMX208_PPL_384MHZ - imx208->cur_mode->width,
IMX208_PPL_384MHZ - imx208->cur_mode->width,
1,
IMX208_PPL_384MHZ - imx208->cur_mode->width);
if (imx208->hblank)
imx208->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
exposure_max = imx208->cur_mode->vts_def - 8;
v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_EXPOSURE,
IMX208_EXPOSURE_MIN, exposure_max,
IMX208_EXPOSURE_STEP, IMX208_EXPOSURE_DEFAULT);
imx208->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
if (imx208->hflip)
imx208->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
imx208->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
if (imx208->vflip)
imx208->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
v4l2_ctrl_new_std(ctrl_hdlr, &imx208_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
IMX208_ANA_GAIN_MIN, IMX208_ANA_GAIN_MAX,
IMX208_ANA_GAIN_STEP, IMX208_ANA_GAIN_DEFAULT);
v4l2_ctrl_new_custom(ctrl_hdlr, &imx208_digital_gain_control, NULL);
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx208_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(imx208_test_pattern_menu) - 1,
0, 0, imx208_test_pattern_menu);
if (ctrl_hdlr->error) {
ret = ctrl_hdlr->error;
dev_err(&client->dev, "%s control init failed (%d)\n",
__func__, ret);
goto error;
}
imx208->sd.ctrl_handler = ctrl_hdlr;
return 0;
error:
v4l2_ctrl_handler_free(ctrl_hdlr);
mutex_destroy(&imx208->imx208_mx);
return ret;
}
static void imx208_free_controls(struct imx208 *imx208)
{
v4l2_ctrl_handler_free(imx208->sd.ctrl_handler);
}
static int imx208_probe(struct i2c_client *client)
{
struct imx208 *imx208;
int ret;
bool full_power;
u32 val = 0;
device_property_read_u32(&client->dev, "clock-frequency", &val);
if (val != 19200000) {
dev_err(&client->dev,
"Unsupported clock-frequency %u. Expected 19200000.\n",
val);
return -EINVAL;
}
imx208 = devm_kzalloc(&client->dev, sizeof(*imx208), GFP_KERNEL);
if (!imx208)
return -ENOMEM;
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx208->sd, client, &imx208_subdev_ops);
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
/* Check module identity */
ret = imx208_identify_module(imx208);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d", ret);
goto error_probe;
}
}
/* Set default mode to max resolution */
imx208->cur_mode = &supported_modes[0];
ret = imx208_init_controls(imx208);
if (ret) {
dev_err(&client->dev, "failed to init controls: %d", ret);
goto error_probe;
}
/* Initialize subdev */
imx208->sd.internal_ops = &imx208_internal_ops;
imx208->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
imx208->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
/* Initialize source pad */
imx208->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&imx208->sd.entity, 1, &imx208->pad);
if (ret) {
dev_err(&client->dev, "%s failed:%d\n", __func__, ret);
goto error_handler_free;
}
ret = v4l2_async_register_subdev_sensor(&imx208->sd);
if (ret < 0)
goto error_media_entity;
ret = device_create_bin_file(&client->dev, &bin_attr_otp);
if (ret) {
dev_err(&client->dev, "sysfs otp creation failed\n");
goto error_async_subdev;
}
/* Set the device's state to active if it's in D0 state. */
if (full_power)
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
return 0;
error_async_subdev:
v4l2_async_unregister_subdev(&imx208->sd);
error_media_entity:
media_entity_cleanup(&imx208->sd.entity);
error_handler_free:
imx208_free_controls(imx208);
error_probe:
mutex_destroy(&imx208->imx208_mx);
return ret;
}
static void imx208_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct imx208 *imx208 = to_imx208(sd);
device_remove_bin_file(&client->dev, &bin_attr_otp);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
imx208_free_controls(imx208);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
mutex_destroy(&imx208->imx208_mx);
}
static const struct dev_pm_ops imx208_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(imx208_suspend, imx208_resume)
};
#ifdef CONFIG_ACPI
static const struct acpi_device_id imx208_acpi_ids[] = {
{ "INT3478" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(acpi, imx208_acpi_ids);
#endif
static struct i2c_driver imx208_i2c_driver = {
.driver = {
.name = "imx208",
.pm = &imx208_pm_ops,
.acpi_match_table = ACPI_PTR(imx208_acpi_ids),
},
.probe_new = imx208_probe,
.remove = imx208_remove,
.flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(imx208_i2c_driver);
MODULE_AUTHOR("Yeh, Andy <andy.yeh@intel.com>");
MODULE_AUTHOR("Chen, Ping-chung <ping-chung.chen@intel.com>");
MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>");
MODULE_DESCRIPTION("Sony IMX208 sensor driver");
MODULE_LICENSE("GPL v2");
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