https://github.com/torvalds/linux
Tip revision: 3d7cb6b04c3f3115719235cc6866b10326de34cd authored by Linus Torvalds on 31 July 2022, 21:03:01 UTC
Linux 5.19
Linux 5.19
Tip revision: 3d7cb6b
imx290.c
// SPDX-License-Identifier: GPL-2.0
/*
* Sony IMX290 CMOS Image Sensor Driver
*
* Copyright (C) 2019 FRAMOS GmbH.
*
* Copyright (C) 2019 Linaro Ltd.
* Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <media/media-entity.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#define IMX290_STANDBY 0x3000
#define IMX290_REGHOLD 0x3001
#define IMX290_XMSTA 0x3002
#define IMX290_FR_FDG_SEL 0x3009
#define IMX290_BLKLEVEL_LOW 0x300a
#define IMX290_BLKLEVEL_HIGH 0x300b
#define IMX290_GAIN 0x3014
#define IMX290_HMAX_LOW 0x301c
#define IMX290_HMAX_HIGH 0x301d
#define IMX290_PGCTRL 0x308c
#define IMX290_PHY_LANE_NUM 0x3407
#define IMX290_CSI_LANE_MODE 0x3443
#define IMX290_PGCTRL_REGEN BIT(0)
#define IMX290_PGCTRL_THRU BIT(1)
#define IMX290_PGCTRL_MODE(n) ((n) << 4)
static const char * const imx290_supply_name[] = {
"vdda",
"vddd",
"vdddo",
};
#define IMX290_NUM_SUPPLIES ARRAY_SIZE(imx290_supply_name)
struct imx290_regval {
u16 reg;
u8 val;
};
struct imx290_mode {
u32 width;
u32 height;
u32 hmax;
u8 link_freq_index;
const struct imx290_regval *data;
u32 data_size;
};
struct imx290 {
struct device *dev;
struct clk *xclk;
struct regmap *regmap;
u8 nlanes;
u8 bpp;
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_mbus_framefmt current_format;
const struct imx290_mode *current_mode;
struct regulator_bulk_data supplies[IMX290_NUM_SUPPLIES];
struct gpio_desc *rst_gpio;
struct v4l2_ctrl_handler ctrls;
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct mutex lock;
};
struct imx290_pixfmt {
u32 code;
u8 bpp;
};
static const struct imx290_pixfmt imx290_formats[] = {
{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
};
static const struct regmap_config imx290_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
};
static const char * const imx290_test_pattern_menu[] = {
"Disabled",
"Sequence Pattern 1",
"Horizontal Color-bar Chart",
"Vertical Color-bar Chart",
"Sequence Pattern 2",
"Gradation Pattern 1",
"Gradation Pattern 2",
"000/555h Toggle Pattern",
};
static const struct imx290_regval imx290_global_init_settings[] = {
{ 0x3007, 0x00 },
{ 0x3018, 0x65 },
{ 0x3019, 0x04 },
{ 0x301a, 0x00 },
{ 0x3444, 0x20 },
{ 0x3445, 0x25 },
{ 0x303a, 0x0c },
{ 0x3040, 0x00 },
{ 0x3041, 0x00 },
{ 0x303c, 0x00 },
{ 0x303d, 0x00 },
{ 0x3042, 0x9c },
{ 0x3043, 0x07 },
{ 0x303e, 0x49 },
{ 0x303f, 0x04 },
{ 0x304b, 0x0a },
{ 0x300f, 0x00 },
{ 0x3010, 0x21 },
{ 0x3012, 0x64 },
{ 0x3016, 0x09 },
{ 0x3070, 0x02 },
{ 0x3071, 0x11 },
{ 0x309b, 0x10 },
{ 0x309c, 0x22 },
{ 0x30a2, 0x02 },
{ 0x30a6, 0x20 },
{ 0x30a8, 0x20 },
{ 0x30aa, 0x20 },
{ 0x30ac, 0x20 },
{ 0x30b0, 0x43 },
{ 0x3119, 0x9e },
{ 0x311c, 0x1e },
{ 0x311e, 0x08 },
{ 0x3128, 0x05 },
{ 0x313d, 0x83 },
{ 0x3150, 0x03 },
{ 0x317e, 0x00 },
{ 0x32b8, 0x50 },
{ 0x32b9, 0x10 },
{ 0x32ba, 0x00 },
{ 0x32bb, 0x04 },
{ 0x32c8, 0x50 },
{ 0x32c9, 0x10 },
{ 0x32ca, 0x00 },
{ 0x32cb, 0x04 },
{ 0x332c, 0xd3 },
{ 0x332d, 0x10 },
{ 0x332e, 0x0d },
{ 0x3358, 0x06 },
{ 0x3359, 0xe1 },
{ 0x335a, 0x11 },
{ 0x3360, 0x1e },
{ 0x3361, 0x61 },
{ 0x3362, 0x10 },
{ 0x33b0, 0x50 },
{ 0x33b2, 0x1a },
{ 0x33b3, 0x04 },
};
static const struct imx290_regval imx290_1080p_settings[] = {
/* mode settings */
{ 0x3007, 0x00 },
{ 0x303a, 0x0c },
{ 0x3414, 0x0a },
{ 0x3472, 0x80 },
{ 0x3473, 0x07 },
{ 0x3418, 0x38 },
{ 0x3419, 0x04 },
{ 0x3012, 0x64 },
{ 0x3013, 0x00 },
{ 0x305c, 0x18 },
{ 0x305d, 0x03 },
{ 0x305e, 0x20 },
{ 0x305f, 0x01 },
{ 0x315e, 0x1a },
{ 0x3164, 0x1a },
{ 0x3480, 0x49 },
/* data rate settings */
{ 0x3405, 0x10 },
{ 0x3446, 0x57 },
{ 0x3447, 0x00 },
{ 0x3448, 0x37 },
{ 0x3449, 0x00 },
{ 0x344a, 0x1f },
{ 0x344b, 0x00 },
{ 0x344c, 0x1f },
{ 0x344d, 0x00 },
{ 0x344e, 0x1f },
{ 0x344f, 0x00 },
{ 0x3450, 0x77 },
{ 0x3451, 0x00 },
{ 0x3452, 0x1f },
{ 0x3453, 0x00 },
{ 0x3454, 0x17 },
{ 0x3455, 0x00 },
};
static const struct imx290_regval imx290_720p_settings[] = {
/* mode settings */
{ 0x3007, 0x10 },
{ 0x303a, 0x06 },
{ 0x3414, 0x04 },
{ 0x3472, 0x00 },
{ 0x3473, 0x05 },
{ 0x3418, 0xd0 },
{ 0x3419, 0x02 },
{ 0x3012, 0x64 },
{ 0x3013, 0x00 },
{ 0x305c, 0x20 },
{ 0x305d, 0x00 },
{ 0x305e, 0x20 },
{ 0x305f, 0x01 },
{ 0x315e, 0x1a },
{ 0x3164, 0x1a },
{ 0x3480, 0x49 },
/* data rate settings */
{ 0x3405, 0x10 },
{ 0x3446, 0x4f },
{ 0x3447, 0x00 },
{ 0x3448, 0x2f },
{ 0x3449, 0x00 },
{ 0x344a, 0x17 },
{ 0x344b, 0x00 },
{ 0x344c, 0x17 },
{ 0x344d, 0x00 },
{ 0x344e, 0x17 },
{ 0x344f, 0x00 },
{ 0x3450, 0x57 },
{ 0x3451, 0x00 },
{ 0x3452, 0x17 },
{ 0x3453, 0x00 },
{ 0x3454, 0x17 },
{ 0x3455, 0x00 },
};
static const struct imx290_regval imx290_10bit_settings[] = {
{ 0x3005, 0x00},
{ 0x3046, 0x00},
{ 0x3129, 0x1d},
{ 0x317c, 0x12},
{ 0x31ec, 0x37},
{ 0x3441, 0x0a},
{ 0x3442, 0x0a},
{ 0x300a, 0x3c},
{ 0x300b, 0x00},
};
static const struct imx290_regval imx290_12bit_settings[] = {
{ 0x3005, 0x01 },
{ 0x3046, 0x01 },
{ 0x3129, 0x00 },
{ 0x317c, 0x00 },
{ 0x31ec, 0x0e },
{ 0x3441, 0x0c },
{ 0x3442, 0x0c },
{ 0x300a, 0xf0 },
{ 0x300b, 0x00 },
};
/* supported link frequencies */
#define FREQ_INDEX_1080P 0
#define FREQ_INDEX_720P 1
static const s64 imx290_link_freq_2lanes[] = {
[FREQ_INDEX_1080P] = 445500000,
[FREQ_INDEX_720P] = 297000000,
};
static const s64 imx290_link_freq_4lanes[] = {
[FREQ_INDEX_1080P] = 222750000,
[FREQ_INDEX_720P] = 148500000,
};
/*
* In this function and in the similar ones below We rely on imx290_probe()
* to ensure that nlanes is either 2 or 4.
*/
static inline const s64 *imx290_link_freqs_ptr(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return imx290_link_freq_2lanes;
else
return imx290_link_freq_4lanes;
}
static inline int imx290_link_freqs_num(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return ARRAY_SIZE(imx290_link_freq_2lanes);
else
return ARRAY_SIZE(imx290_link_freq_4lanes);
}
/* Mode configs */
static const struct imx290_mode imx290_modes_2lanes[] = {
{
.width = 1920,
.height = 1080,
.hmax = 0x1130,
.link_freq_index = FREQ_INDEX_1080P,
.data = imx290_1080p_settings,
.data_size = ARRAY_SIZE(imx290_1080p_settings),
},
{
.width = 1280,
.height = 720,
.hmax = 0x19c8,
.link_freq_index = FREQ_INDEX_720P,
.data = imx290_720p_settings,
.data_size = ARRAY_SIZE(imx290_720p_settings),
},
};
static const struct imx290_mode imx290_modes_4lanes[] = {
{
.width = 1920,
.height = 1080,
.hmax = 0x0898,
.link_freq_index = FREQ_INDEX_1080P,
.data = imx290_1080p_settings,
.data_size = ARRAY_SIZE(imx290_1080p_settings),
},
{
.width = 1280,
.height = 720,
.hmax = 0x0ce4,
.link_freq_index = FREQ_INDEX_720P,
.data = imx290_720p_settings,
.data_size = ARRAY_SIZE(imx290_720p_settings),
},
};
static inline const struct imx290_mode *imx290_modes_ptr(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return imx290_modes_2lanes;
else
return imx290_modes_4lanes;
}
static inline int imx290_modes_num(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return ARRAY_SIZE(imx290_modes_2lanes);
else
return ARRAY_SIZE(imx290_modes_4lanes);
}
static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
{
return container_of(_sd, struct imx290, sd);
}
static inline int __always_unused imx290_read_reg(struct imx290 *imx290, u16 addr, u8 *value)
{
unsigned int regval;
int ret;
ret = regmap_read(imx290->regmap, addr, ®val);
if (ret) {
dev_err(imx290->dev, "I2C read failed for addr: %x\n", addr);
return ret;
}
*value = regval & 0xff;
return 0;
}
static int imx290_write_reg(struct imx290 *imx290, u16 addr, u8 value)
{
int ret;
ret = regmap_write(imx290->regmap, addr, value);
if (ret) {
dev_err(imx290->dev, "I2C write failed for addr: %x\n", addr);
return ret;
}
return ret;
}
static int imx290_set_register_array(struct imx290 *imx290,
const struct imx290_regval *settings,
unsigned int num_settings)
{
unsigned int i;
int ret;
for (i = 0; i < num_settings; ++i, ++settings) {
ret = imx290_write_reg(imx290, settings->reg, settings->val);
if (ret < 0)
return ret;
}
/* Provide 10ms settle time */
usleep_range(10000, 11000);
return 0;
}
static int imx290_write_buffered_reg(struct imx290 *imx290, u16 address_low,
u8 nr_regs, u32 value)
{
unsigned int i;
int ret;
ret = imx290_write_reg(imx290, IMX290_REGHOLD, 0x01);
if (ret) {
dev_err(imx290->dev, "Error setting hold register\n");
return ret;
}
for (i = 0; i < nr_regs; i++) {
ret = imx290_write_reg(imx290, address_low + i,
(u8)(value >> (i * 8)));
if (ret) {
dev_err(imx290->dev, "Error writing buffered registers\n");
return ret;
}
}
ret = imx290_write_reg(imx290, IMX290_REGHOLD, 0x00);
if (ret) {
dev_err(imx290->dev, "Error setting hold register\n");
return ret;
}
return ret;
}
static int imx290_set_gain(struct imx290 *imx290, u32 value)
{
int ret;
ret = imx290_write_buffered_reg(imx290, IMX290_GAIN, 1, value);
if (ret)
dev_err(imx290->dev, "Unable to write gain\n");
return ret;
}
/* Stop streaming */
static int imx290_stop_streaming(struct imx290 *imx290)
{
int ret;
ret = imx290_write_reg(imx290, IMX290_STANDBY, 0x01);
if (ret < 0)
return ret;
msleep(30);
return imx290_write_reg(imx290, IMX290_XMSTA, 0x01);
}
static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct imx290 *imx290 = container_of(ctrl->handler,
struct imx290, ctrls);
int ret = 0;
/* V4L2 controls values will be applied only when power is already up */
if (!pm_runtime_get_if_in_use(imx290->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_GAIN:
ret = imx290_set_gain(imx290, ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
if (ctrl->val) {
imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW, 0x00);
imx290_write_reg(imx290, IMX290_BLKLEVEL_HIGH, 0x00);
usleep_range(10000, 11000);
imx290_write_reg(imx290, IMX290_PGCTRL,
(u8)(IMX290_PGCTRL_REGEN |
IMX290_PGCTRL_THRU |
IMX290_PGCTRL_MODE(ctrl->val)));
} else {
imx290_write_reg(imx290, IMX290_PGCTRL, 0x00);
usleep_range(10000, 11000);
if (imx290->bpp == 10)
imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW,
0x3c);
else /* 12 bits per pixel */
imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW,
0xf0);
imx290_write_reg(imx290, IMX290_BLKLEVEL_HIGH, 0x00);
}
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_put(imx290->dev);
return ret;
}
static const struct v4l2_ctrl_ops imx290_ctrl_ops = {
.s_ctrl = imx290_set_ctrl,
};
static int imx290_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index >= ARRAY_SIZE(imx290_formats))
return -EINVAL;
code->code = imx290_formats[code->index].code;
return 0;
}
static int imx290_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
const struct imx290 *imx290 = to_imx290(sd);
const struct imx290_mode *imx290_modes = imx290_modes_ptr(imx290);
if ((fse->code != imx290_formats[0].code) &&
(fse->code != imx290_formats[1].code))
return -EINVAL;
if (fse->index >= imx290_modes_num(imx290))
return -EINVAL;
fse->min_width = imx290_modes[fse->index].width;
fse->max_width = imx290_modes[fse->index].width;
fse->min_height = imx290_modes[fse->index].height;
fse->max_height = imx290_modes[fse->index].height;
return 0;
}
static int imx290_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct imx290 *imx290 = to_imx290(sd);
struct v4l2_mbus_framefmt *framefmt;
mutex_lock(&imx290->lock);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
framefmt = v4l2_subdev_get_try_format(&imx290->sd, sd_state,
fmt->pad);
else
framefmt = &imx290->current_format;
fmt->format = *framefmt;
mutex_unlock(&imx290->lock);
return 0;
}
static inline u8 imx290_get_link_freq_index(struct imx290 *imx290)
{
return imx290->current_mode->link_freq_index;
}
static s64 imx290_get_link_freq(struct imx290 *imx290)
{
u8 index = imx290_get_link_freq_index(imx290);
return *(imx290_link_freqs_ptr(imx290) + index);
}
static u64 imx290_calc_pixel_rate(struct imx290 *imx290)
{
s64 link_freq = imx290_get_link_freq(imx290);
u8 nlanes = imx290->nlanes;
u64 pixel_rate;
/* pixel rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
pixel_rate = link_freq * 2 * nlanes;
do_div(pixel_rate, imx290->bpp);
return pixel_rate;
}
static int imx290_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct imx290 *imx290 = to_imx290(sd);
const struct imx290_mode *mode;
struct v4l2_mbus_framefmt *format;
unsigned int i;
mutex_lock(&imx290->lock);
mode = v4l2_find_nearest_size(imx290_modes_ptr(imx290),
imx290_modes_num(imx290), width, height,
fmt->format.width, fmt->format.height);
fmt->format.width = mode->width;
fmt->format.height = mode->height;
for (i = 0; i < ARRAY_SIZE(imx290_formats); i++)
if (imx290_formats[i].code == fmt->format.code)
break;
if (i >= ARRAY_SIZE(imx290_formats))
i = 0;
fmt->format.code = imx290_formats[i].code;
fmt->format.field = V4L2_FIELD_NONE;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
format = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
} else {
format = &imx290->current_format;
imx290->current_mode = mode;
imx290->bpp = imx290_formats[i].bpp;
if (imx290->link_freq)
__v4l2_ctrl_s_ctrl(imx290->link_freq,
imx290_get_link_freq_index(imx290));
if (imx290->pixel_rate)
__v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate,
imx290_calc_pixel_rate(imx290));
}
*format = fmt->format;
mutex_unlock(&imx290->lock);
return 0;
}
static int imx290_entity_init_cfg(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state)
{
struct v4l2_subdev_format fmt = { 0 };
fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
fmt.format.width = 1920;
fmt.format.height = 1080;
imx290_set_fmt(subdev, sd_state, &fmt);
return 0;
}
static int imx290_write_current_format(struct imx290 *imx290)
{
int ret;
switch (imx290->current_format.code) {
case MEDIA_BUS_FMT_SRGGB10_1X10:
ret = imx290_set_register_array(imx290, imx290_10bit_settings,
ARRAY_SIZE(
imx290_10bit_settings));
if (ret < 0) {
dev_err(imx290->dev, "Could not set format registers\n");
return ret;
}
break;
case MEDIA_BUS_FMT_SRGGB12_1X12:
ret = imx290_set_register_array(imx290, imx290_12bit_settings,
ARRAY_SIZE(
imx290_12bit_settings));
if (ret < 0) {
dev_err(imx290->dev, "Could not set format registers\n");
return ret;
}
break;
default:
dev_err(imx290->dev, "Unknown pixel format\n");
return -EINVAL;
}
return 0;
}
static int imx290_set_hmax(struct imx290 *imx290, u32 val)
{
int ret;
ret = imx290_write_reg(imx290, IMX290_HMAX_LOW, (val & 0xff));
if (ret) {
dev_err(imx290->dev, "Error setting HMAX register\n");
return ret;
}
ret = imx290_write_reg(imx290, IMX290_HMAX_HIGH, ((val >> 8) & 0xff));
if (ret) {
dev_err(imx290->dev, "Error setting HMAX register\n");
return ret;
}
return 0;
}
/* Start streaming */
static int imx290_start_streaming(struct imx290 *imx290)
{
int ret;
/* Set init register settings */
ret = imx290_set_register_array(imx290, imx290_global_init_settings,
ARRAY_SIZE(
imx290_global_init_settings));
if (ret < 0) {
dev_err(imx290->dev, "Could not set init registers\n");
return ret;
}
/* Apply the register values related to current frame format */
ret = imx290_write_current_format(imx290);
if (ret < 0) {
dev_err(imx290->dev, "Could not set frame format\n");
return ret;
}
/* Apply default values of current mode */
ret = imx290_set_register_array(imx290, imx290->current_mode->data,
imx290->current_mode->data_size);
if (ret < 0) {
dev_err(imx290->dev, "Could not set current mode\n");
return ret;
}
ret = imx290_set_hmax(imx290, imx290->current_mode->hmax);
if (ret < 0)
return ret;
/* Apply customized values from user */
ret = v4l2_ctrl_handler_setup(imx290->sd.ctrl_handler);
if (ret) {
dev_err(imx290->dev, "Could not sync v4l2 controls\n");
return ret;
}
ret = imx290_write_reg(imx290, IMX290_STANDBY, 0x00);
if (ret < 0)
return ret;
msleep(30);
/* Start streaming */
return imx290_write_reg(imx290, IMX290_XMSTA, 0x00);
}
static int imx290_set_stream(struct v4l2_subdev *sd, int enable)
{
struct imx290 *imx290 = to_imx290(sd);
int ret = 0;
if (enable) {
ret = pm_runtime_resume_and_get(imx290->dev);
if (ret < 0)
goto unlock_and_return;
ret = imx290_start_streaming(imx290);
if (ret) {
dev_err(imx290->dev, "Start stream failed\n");
pm_runtime_put(imx290->dev);
goto unlock_and_return;
}
} else {
imx290_stop_streaming(imx290);
pm_runtime_put(imx290->dev);
}
unlock_and_return:
return ret;
}
static int imx290_get_regulators(struct device *dev, struct imx290 *imx290)
{
unsigned int i;
for (i = 0; i < IMX290_NUM_SUPPLIES; i++)
imx290->supplies[i].supply = imx290_supply_name[i];
return devm_regulator_bulk_get(dev, IMX290_NUM_SUPPLIES,
imx290->supplies);
}
static int imx290_set_data_lanes(struct imx290 *imx290)
{
int ret = 0, laneval, frsel;
switch (imx290->nlanes) {
case 2:
laneval = 0x01;
frsel = 0x02;
break;
case 4:
laneval = 0x03;
frsel = 0x01;
break;
default:
/*
* We should never hit this since the data lane count is
* validated in probe itself
*/
dev_err(imx290->dev, "Lane configuration not supported\n");
ret = -EINVAL;
goto exit;
}
ret = imx290_write_reg(imx290, IMX290_PHY_LANE_NUM, laneval);
if (ret) {
dev_err(imx290->dev, "Error setting Physical Lane number register\n");
goto exit;
}
ret = imx290_write_reg(imx290, IMX290_CSI_LANE_MODE, laneval);
if (ret) {
dev_err(imx290->dev, "Error setting CSI Lane mode register\n");
goto exit;
}
ret = imx290_write_reg(imx290, IMX290_FR_FDG_SEL, frsel);
if (ret)
dev_err(imx290->dev, "Error setting FR/FDG SEL register\n");
exit:
return ret;
}
static int imx290_power_on(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx290 *imx290 = to_imx290(sd);
int ret;
ret = clk_prepare_enable(imx290->xclk);
if (ret) {
dev_err(dev, "Failed to enable clock\n");
return ret;
}
ret = regulator_bulk_enable(IMX290_NUM_SUPPLIES, imx290->supplies);
if (ret) {
dev_err(dev, "Failed to enable regulators\n");
clk_disable_unprepare(imx290->xclk);
return ret;
}
usleep_range(1, 2);
gpiod_set_value_cansleep(imx290->rst_gpio, 0);
usleep_range(30000, 31000);
/* Set data lane count */
imx290_set_data_lanes(imx290);
return 0;
}
static int imx290_power_off(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx290 *imx290 = to_imx290(sd);
clk_disable_unprepare(imx290->xclk);
gpiod_set_value_cansleep(imx290->rst_gpio, 1);
regulator_bulk_disable(IMX290_NUM_SUPPLIES, imx290->supplies);
return 0;
}
static const struct dev_pm_ops imx290_pm_ops = {
SET_RUNTIME_PM_OPS(imx290_power_off, imx290_power_on, NULL)
};
static const struct v4l2_subdev_video_ops imx290_video_ops = {
.s_stream = imx290_set_stream,
};
static const struct v4l2_subdev_pad_ops imx290_pad_ops = {
.init_cfg = imx290_entity_init_cfg,
.enum_mbus_code = imx290_enum_mbus_code,
.enum_frame_size = imx290_enum_frame_size,
.get_fmt = imx290_get_fmt,
.set_fmt = imx290_set_fmt,
};
static const struct v4l2_subdev_ops imx290_subdev_ops = {
.video = &imx290_video_ops,
.pad = &imx290_pad_ops,
};
static const struct media_entity_operations imx290_subdev_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
/*
* Returns 0 if all link frequencies used by the driver for the given number
* of MIPI data lanes are mentioned in the device tree, or the value of the
* first missing frequency otherwise.
*/
static s64 imx290_check_link_freqs(const struct imx290 *imx290,
const struct v4l2_fwnode_endpoint *ep)
{
int i, j;
const s64 *freqs = imx290_link_freqs_ptr(imx290);
int freqs_count = imx290_link_freqs_num(imx290);
for (i = 0; i < freqs_count; i++) {
for (j = 0; j < ep->nr_of_link_frequencies; j++)
if (freqs[i] == ep->link_frequencies[j])
break;
if (j == ep->nr_of_link_frequencies)
return freqs[i];
}
return 0;
}
static int imx290_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct fwnode_handle *endpoint;
/* Only CSI2 is supported for now: */
struct v4l2_fwnode_endpoint ep = {
.bus_type = V4L2_MBUS_CSI2_DPHY
};
struct imx290 *imx290;
u32 xclk_freq;
s64 fq;
int ret;
imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL);
if (!imx290)
return -ENOMEM;
imx290->dev = dev;
imx290->regmap = devm_regmap_init_i2c(client, &imx290_regmap_config);
if (IS_ERR(imx290->regmap)) {
dev_err(dev, "Unable to initialize I2C\n");
return -ENODEV;
}
endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
if (!endpoint) {
dev_err(dev, "Endpoint node not found\n");
return -EINVAL;
}
ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep);
fwnode_handle_put(endpoint);
if (ret == -ENXIO) {
dev_err(dev, "Unsupported bus type, should be CSI2\n");
goto free_err;
} else if (ret) {
dev_err(dev, "Parsing endpoint node failed\n");
goto free_err;
}
/* Get number of data lanes */
imx290->nlanes = ep.bus.mipi_csi2.num_data_lanes;
if (imx290->nlanes != 2 && imx290->nlanes != 4) {
dev_err(dev, "Invalid data lanes: %d\n", imx290->nlanes);
ret = -EINVAL;
goto free_err;
}
dev_dbg(dev, "Using %u data lanes\n", imx290->nlanes);
if (!ep.nr_of_link_frequencies) {
dev_err(dev, "link-frequency property not found in DT\n");
ret = -EINVAL;
goto free_err;
}
/* Check that link frequences for all the modes are in device tree */
fq = imx290_check_link_freqs(imx290, &ep);
if (fq) {
dev_err(dev, "Link frequency of %lld is not supported\n", fq);
ret = -EINVAL;
goto free_err;
}
/* get system clock (xclk) */
imx290->xclk = devm_clk_get(dev, "xclk");
if (IS_ERR(imx290->xclk)) {
dev_err(dev, "Could not get xclk");
ret = PTR_ERR(imx290->xclk);
goto free_err;
}
ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
&xclk_freq);
if (ret) {
dev_err(dev, "Could not get xclk frequency\n");
goto free_err;
}
/* external clock must be 37.125 MHz */
if (xclk_freq != 37125000) {
dev_err(dev, "External clock frequency %u is not supported\n",
xclk_freq);
ret = -EINVAL;
goto free_err;
}
ret = clk_set_rate(imx290->xclk, xclk_freq);
if (ret) {
dev_err(dev, "Could not set xclk frequency\n");
goto free_err;
}
ret = imx290_get_regulators(dev, imx290);
if (ret < 0) {
dev_err(dev, "Cannot get regulators\n");
goto free_err;
}
imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(imx290->rst_gpio)) {
dev_err(dev, "Cannot get reset gpio\n");
ret = PTR_ERR(imx290->rst_gpio);
goto free_err;
}
mutex_init(&imx290->lock);
/*
* Initialize the frame format. In particular, imx290->current_mode
* and imx290->bpp are set to defaults: imx290_calc_pixel_rate() call
* below relies on these fields.
*/
imx290_entity_init_cfg(&imx290->sd, NULL);
v4l2_ctrl_handler_init(&imx290->ctrls, 4);
v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_GAIN, 0, 72, 1, 0);
imx290->link_freq =
v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_LINK_FREQ,
imx290_link_freqs_num(imx290) - 1, 0,
imx290_link_freqs_ptr(imx290));
if (imx290->link_freq)
imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
imx290->pixel_rate = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_PIXEL_RATE,
1, INT_MAX, 1,
imx290_calc_pixel_rate(imx290));
v4l2_ctrl_new_std_menu_items(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(imx290_test_pattern_menu) - 1,
0, 0, imx290_test_pattern_menu);
imx290->sd.ctrl_handler = &imx290->ctrls;
if (imx290->ctrls.error) {
dev_err(dev, "Control initialization error %d\n",
imx290->ctrls.error);
ret = imx290->ctrls.error;
goto free_ctrl;
}
v4l2_i2c_subdev_init(&imx290->sd, client, &imx290_subdev_ops);
imx290->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
imx290->sd.dev = &client->dev;
imx290->sd.entity.ops = &imx290_subdev_entity_ops;
imx290->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
imx290->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&imx290->sd.entity, 1, &imx290->pad);
if (ret < 0) {
dev_err(dev, "Could not register media entity\n");
goto free_ctrl;
}
ret = v4l2_async_register_subdev(&imx290->sd);
if (ret < 0) {
dev_err(dev, "Could not register v4l2 device\n");
goto free_entity;
}
/* Power on the device to match runtime PM state below */
ret = imx290_power_on(dev);
if (ret < 0) {
dev_err(dev, "Could not power on the device\n");
goto free_entity;
}
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
v4l2_fwnode_endpoint_free(&ep);
return 0;
free_entity:
media_entity_cleanup(&imx290->sd.entity);
free_ctrl:
v4l2_ctrl_handler_free(&imx290->ctrls);
mutex_destroy(&imx290->lock);
free_err:
v4l2_fwnode_endpoint_free(&ep);
return ret;
}
static int imx290_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct imx290 *imx290 = to_imx290(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(sd->ctrl_handler);
mutex_destroy(&imx290->lock);
pm_runtime_disable(imx290->dev);
if (!pm_runtime_status_suspended(imx290->dev))
imx290_power_off(imx290->dev);
pm_runtime_set_suspended(imx290->dev);
return 0;
}
static const struct of_device_id imx290_of_match[] = {
{ .compatible = "sony,imx290" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx290_of_match);
static struct i2c_driver imx290_i2c_driver = {
.probe_new = imx290_probe,
.remove = imx290_remove,
.driver = {
.name = "imx290",
.pm = &imx290_pm_ops,
.of_match_table = of_match_ptr(imx290_of_match),
},
};
module_i2c_driver(imx290_i2c_driver);
MODULE_DESCRIPTION("Sony IMX290 CMOS Image Sensor Driver");
MODULE_AUTHOR("FRAMOS GmbH");
MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
MODULE_LICENSE("GPL v2");
