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linux/drivers/media/i2c/imx274.c
Uwe Kleine-König ed5c2f5fd1 i2c: Make remove callback return void 
The value returned by an i2c driver's remove function is mostly ignored.
(Only an error message is printed if the value is non-zero that the
error is ignored.)

So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour, all callbacks were prepared to
return 0 before.

Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com>
Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Crt Mori <cmo@melexis.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/*
Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5
Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio
Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860
Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b
Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes
Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power
Acked-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-16 12:46:26 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* imx274.c - IMX274 CMOS Image Sensor driver
*
* Copyright (C) 2017, Leopard Imaging, Inc.
*
* Leon Luo <leonl@leopardimaging.com>
* Edwin Zou <edwinz@leopardimaging.com>
* Luca Ceresoli <luca@lucaceresoli.net>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
/*
* See "SHR, SVR Setting" in datasheet
*/
#define IMX274_DEFAULT_FRAME_LENGTH (4550)
#define IMX274_MAX_FRAME_LENGTH (0x000fffff)
/*
* See "Frame Rate Adjustment" in datasheet
*/
#define IMX274_PIXCLK_CONST1 (72000000)
#define IMX274_PIXCLK_CONST2 (1000000)
/*
* The input gain is shifted by IMX274_GAIN_SHIFT to get
* decimal number. The real gain is
* (float)input_gain_value / (1 << IMX274_GAIN_SHIFT)
*/
#define IMX274_GAIN_SHIFT (8)
#define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1)
/*
* See "Analog Gain" and "Digital Gain" in datasheet
* min gain is 1X
* max gain is calculated based on IMX274_GAIN_REG_MAX
*/
#define IMX274_GAIN_REG_MAX (1957)
#define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT)
#define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\
/ (2048 - IMX274_GAIN_REG_MAX))
#define IMX274_MAX_DIGITAL_GAIN (8)
#define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT)
#define IMX274_GAIN_CONST (2048) /* for gain formula */
/*
* 1 line time in us = (HMAX / 72), minimal is 4 lines
*/
#define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72)
#define IMX274_MAX_WIDTH (3840)
#define IMX274_MAX_HEIGHT (2160)
#define IMX274_MAX_FRAME_RATE (120)
#define IMX274_MIN_FRAME_RATE (5)
#define IMX274_DEF_FRAME_RATE (60)
/*
* register SHR is limited to (SVR value + 1) x VMAX value - 4
*/
#define IMX274_SHR_LIMIT_CONST (4)
/*
* Min and max sensor reset delay (microseconds)
*/
#define IMX274_RESET_DELAY1 (2000)
#define IMX274_RESET_DELAY2 (2200)
/*
* shift and mask constants
*/
#define IMX274_SHIFT_8_BITS (8)
#define IMX274_SHIFT_16_BITS (16)
#define IMX274_MASK_LSB_2_BITS (0x03)
#define IMX274_MASK_LSB_3_BITS (0x07)
#define IMX274_MASK_LSB_4_BITS (0x0f)
#define IMX274_MASK_LSB_8_BITS (0x00ff)
#define DRIVER_NAME "IMX274"
/*
* IMX274 register definitions
*/
#define IMX274_SHR_REG_MSB 0x300D /* SHR */
#define IMX274_SHR_REG_LSB 0x300C /* SHR */
#define IMX274_SVR_REG_MSB 0x300F /* SVR */
#define IMX274_SVR_REG_LSB 0x300E /* SVR */
#define IMX274_HTRIM_EN_REG 0x3037
#define IMX274_HTRIM_START_REG_LSB 0x3038
#define IMX274_HTRIM_START_REG_MSB 0x3039
#define IMX274_HTRIM_END_REG_LSB 0x303A
#define IMX274_HTRIM_END_REG_MSB 0x303B
#define IMX274_VWIDCUTEN_REG 0x30DD
#define IMX274_VWIDCUT_REG_LSB 0x30DE
#define IMX274_VWIDCUT_REG_MSB 0x30DF
#define IMX274_VWINPOS_REG_LSB 0x30E0
#define IMX274_VWINPOS_REG_MSB 0x30E1
#define IMX274_WRITE_VSIZE_REG_LSB 0x3130
#define IMX274_WRITE_VSIZE_REG_MSB 0x3131
#define IMX274_Y_OUT_SIZE_REG_LSB 0x3132
#define IMX274_Y_OUT_SIZE_REG_MSB 0x3133
#define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */
#define IMX274_VMAX_REG_2 0x30F9 /* VMAX */
#define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */
#define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */
#define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */
#define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */
#define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */
#define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */
#define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */
#define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */
#define IMX274_STANDBY_REG 0x3000 /* STANDBY */
#define IMX274_TABLE_WAIT_MS 0
#define IMX274_TABLE_END 1
/* regulator supplies */
static const char * const imx274_supply_names[] = {
"vddl", /* IF (1.2V) supply */
"vdig", /* Digital Core (1.8V) supply */
"vana", /* Analog (2.8V) supply */
};
#define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names)
/*
* imx274 I2C operation related structure
*/
struct reg_8 {
u16 addr;
u8 val;
};
static const struct regmap_config imx274_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
};
/*
* Parameters for each imx274 readout mode.
*
* These are the values to configure the sensor in one of the
* implemented modes.
*
* @init_regs: registers to initialize the mode
* @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280)
* @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720)
* @min_frame_len: Minimum frame length for each mode (see "Frame Rate
* Adjustment (CSI-2)" in the datasheet)
* @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the
* datasheet)
* @max_fps: Maximum frames per second
* @nocpiop: Number of clocks per internal offset period (see "Integration Time
* in Each Readout Drive Mode (CSI-2)" in the datasheet)
*/
struct imx274_mode {
const struct reg_8 *init_regs;
u8 wbin_ratio;
u8 hbin_ratio;
int min_frame_len;
int min_SHR;
int max_fps;
int nocpiop;
};
/*
* imx274 test pattern related structure
*/
enum {
TEST_PATTERN_DISABLED = 0,
TEST_PATTERN_ALL_000H,
TEST_PATTERN_ALL_FFFH,
TEST_PATTERN_ALL_555H,
TEST_PATTERN_ALL_AAAH,
TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */
TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */
TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */
TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */
TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */
TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */
TEST_PATTERN_H_COLOR_BARS,
TEST_PATTERN_V_COLOR_BARS,
};
static const char * const tp_qmenu[] = {
"Disabled",
"All 000h Pattern",
"All FFFh Pattern",
"All 555h Pattern",
"All AAAh Pattern",
"Vertical Stripe (555h / AAAh)",
"Vertical Stripe (AAAh / 555h)",
"Vertical Stripe (000h / 555h)",
"Vertical Stripe (555h / 000h)",
"Vertical Stripe (000h / FFFh)",
"Vertical Stripe (FFFh / 000h)",
"Vertical Color Bars",
"Horizontal Color Bars",
};
/*
* All-pixel scan mode (10-bit)
* imx274 mode1(refer to datasheet) register configuration with
* 3840x2160 resolution, raw10 data and mipi four lane output
*/
static const struct reg_8 imx274_mode1_3840x2160_raw10[] = {
{0x3004, 0x01},
{0x3005, 0x01},
{0x3006, 0x00},
{0x3007, 0xa2},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x01},
{0x30EE, 0x01},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x16},
{0x3345, 0x00},
{0x33A6, 0x01},
{0x3528, 0x0E},
{0x3554, 0x1F},
{0x3555, 0x01},
{0x3556, 0x01},
{0x3557, 0x01},
{0x3558, 0x01},
{0x3559, 0x00},
{0x355A, 0x00},
{0x35BA, 0x0E},
{0x366A, 0x1B},
{0x366B, 0x1A},
{0x366C, 0x19},
{0x366D, 0x17},
{0x3A41, 0x08},
{IMX274_TABLE_END, 0x00}
};
/*
* Horizontal/vertical 2/2-line binning
* (Horizontal and vertical weightedbinning, 10-bit)
* imx274 mode3(refer to datasheet) register configuration with
* 1920x1080 resolution, raw10 data and mipi four lane output
*/
static const struct reg_8 imx274_mode3_1920x1080_raw10[] = {
{0x3004, 0x02},
{0x3005, 0x21},
{0x3006, 0x00},
{0x3007, 0xb1},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x02},
{0x30EE, 0x01},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x1A},
{0x3345, 0x00},
{0x33A6, 0x01},
{0x3528, 0x0E},
{0x3554, 0x00},
{0x3555, 0x01},
{0x3556, 0x01},
{0x3557, 0x01},
{0x3558, 0x01},
{0x3559, 0x00},
{0x355A, 0x00},
{0x35BA, 0x0E},
{0x366A, 0x1B},
{0x366B, 0x1A},
{0x366C, 0x19},
{0x366D, 0x17},
{0x3A41, 0x08},
{IMX274_TABLE_END, 0x00}
};
/*
* Vertical 2/3 subsampling binning horizontal 3 binning
* imx274 mode5(refer to datasheet) register configuration with
* 1280x720 resolution, raw10 data and mipi four lane output
*/
static const struct reg_8 imx274_mode5_1280x720_raw10[] = {
{0x3004, 0x03},
{0x3005, 0x31},
{0x3006, 0x00},
{0x3007, 0xa9},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x03},
{0x30EE, 0x01},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x1B},
{0x3345, 0x00},
{0x33A6, 0x01},
{0x3528, 0x0E},
{0x3554, 0x00},
{0x3555, 0x01},
{0x3556, 0x01},
{0x3557, 0x01},
{0x3558, 0x01},
{0x3559, 0x00},
{0x355A, 0x00},
{0x35BA, 0x0E},
{0x366A, 0x1B},
{0x366B, 0x19},
{0x366C, 0x17},
{0x366D, 0x17},
{0x3A41, 0x04},
{IMX274_TABLE_END, 0x00}
};
/*
* Vertical 2/8 subsampling horizontal 3 binning
* imx274 mode6(refer to datasheet) register configuration with
* 1280x540 resolution, raw10 data and mipi four lane output
*/
static const struct reg_8 imx274_mode6_1280x540_raw10[] = {
{0x3004, 0x04}, /* mode setting */
{0x3005, 0x31},
{0x3006, 0x00},
{0x3007, 0x02}, /* mode setting */
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x04}, /* mode setting */
{0x30EE, 0x01},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x16},
{0x3345, 0x00},
{0x33A6, 0x01},
{0x3528, 0x0E},
{0x3554, 0x1F},
{0x3555, 0x01},
{0x3556, 0x01},
{0x3557, 0x01},
{0x3558, 0x01},
{0x3559, 0x00},
{0x355A, 0x00},
{0x35BA, 0x0E},
{0x366A, 0x1B},
{0x366B, 0x1A},
{0x366C, 0x19},
{0x366D, 0x17},
{0x3A41, 0x04},
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 first step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_1[] = {
{IMX274_STANDBY_REG, 0x12},
/* PLRD: clock settings */
{0x3120, 0xF0},
{0x3121, 0x00},
{0x3122, 0x02},
{0x3129, 0x9C},
{0x312A, 0x02},
{0x312D, 0x02},
{0x310B, 0x00},
/* PLSTMG */
{0x304C, 0x00}, /* PLSTMG01 */
{0x304D, 0x03},
{0x331C, 0x1A},
{0x331D, 0x00},
{0x3502, 0x02},
{0x3529, 0x0E},
{0x352A, 0x0E},
{0x352B, 0x0E},
{0x3538, 0x0E},
{0x3539, 0x0E},
{0x3553, 0x00},
{0x357D, 0x05},
{0x357F, 0x05},
{0x3581, 0x04},
{0x3583, 0x76},
{0x3587, 0x01},
{0x35BB, 0x0E},
{0x35BC, 0x0E},
{0x35BD, 0x0E},
{0x35BE, 0x0E},
{0x35BF, 0x0E},
{0x366E, 0x00},
{0x366F, 0x00},
{0x3670, 0x00},
{0x3671, 0x00},
/* PSMIPI */
{0x3304, 0x32}, /* PSMIPI1 */
{0x3305, 0x00},
{0x3306, 0x32},
{0x3307, 0x00},
{0x3590, 0x32},
{0x3591, 0x00},
{0x3686, 0x32},
{0x3687, 0x00},
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 second step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_2[] = {
{IMX274_STANDBY_REG, 0x00},
{0x303E, 0x02}, /* SYS_MODE = 2 */
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 third step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_3[] = {
{0x30F4, 0x00},
{0x3018, 0xA2}, /* XHS VHS OUTPUT */
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 register configuration for stopping stream
*/
static const struct reg_8 imx274_stop[] = {
{IMX274_STANDBY_REG, 0x01},
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 disable test pattern register configuration
*/
static const struct reg_8 imx274_tp_disabled[] = {
{0x303C, 0x00},
{0x377F, 0x00},
{0x3781, 0x00},
{0x370B, 0x00},
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 test pattern register configuration
* reg 0x303D defines the test pattern modes
*/
static const struct reg_8 imx274_tp_regs[] = {
{0x303C, 0x11},
{0x370E, 0x01},
{0x377F, 0x01},
{0x3781, 0x01},
{0x370B, 0x11},
{IMX274_TABLE_END, 0x00}
};
/* nocpiop happens to be the same number for the implemented modes */
static const struct imx274_mode imx274_modes[] = {
{
/* mode 1, 4K */
.wbin_ratio = 1, /* 3840 */
.hbin_ratio = 1, /* 2160 */
.init_regs = imx274_mode1_3840x2160_raw10,
.min_frame_len = 4550,
.min_SHR = 12,
.max_fps = 60,
.nocpiop = 112,
},
{
/* mode 3, 1080p */
.wbin_ratio = 2, /* 1920 */
.hbin_ratio = 2, /* 1080 */
.init_regs = imx274_mode3_1920x1080_raw10,
.min_frame_len = 2310,
.min_SHR = 8,
.max_fps = 120,
.nocpiop = 112,
},
{
/* mode 5, 720p */
.wbin_ratio = 3, /* 1280 */
.hbin_ratio = 3, /* 720 */
.init_regs = imx274_mode5_1280x720_raw10,
.min_frame_len = 2310,
.min_SHR = 8,
.max_fps = 120,
.nocpiop = 112,
},
{
/* mode 6, 540p */
.wbin_ratio = 3, /* 1280 */
.hbin_ratio = 4, /* 540 */
.init_regs = imx274_mode6_1280x540_raw10,
.min_frame_len = 2310,
.min_SHR = 4,
.max_fps = 120,
.nocpiop = 112,
},
};
/*
* struct imx274_ctrls - imx274 ctrl structure
* @handler: V4L2 ctrl handler structure
* @exposure: Pointer to expsure ctrl structure
* @gain: Pointer to gain ctrl structure
* @vflip: Pointer to vflip ctrl structure
* @test_pattern: Pointer to test pattern ctrl structure
*/
struct imx274_ctrls {
struct v4l2_ctrl_handler handler;
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *gain;
struct v4l2_ctrl *vflip;
struct v4l2_ctrl *test_pattern;
};
/*
* struct stim274 - imx274 device structure
* @sd: V4L2 subdevice structure
* @pad: Media pad structure
* @client: Pointer to I2C client
* @ctrls: imx274 control structure
* @crop: rect to be captured
* @compose: compose rect, i.e. output resolution
* @format: V4L2 media bus frame format structure
* (width and height are in sync with the compose rect)
* @frame_rate: V4L2 frame rate structure
* @regmap: Pointer to regmap structure
* @reset_gpio: Pointer to reset gpio
* @supplies: List of analog and digital supply regulators
* @inck: Pointer to sensor input clock
* @lock: Mutex structure
* @mode: Parameters for the selected readout mode
*/
struct stimx274 {
struct v4l2_subdev sd;
struct media_pad pad;
struct i2c_client *client;
struct imx274_ctrls ctrls;
struct v4l2_rect crop;
struct v4l2_mbus_framefmt format;
struct v4l2_fract frame_interval;
struct regmap *regmap;
struct gpio_desc *reset_gpio;
struct regulator_bulk_data supplies[IMX274_NUM_SUPPLIES];
struct clk *inck;
struct mutex lock; /* mutex lock for operations */
const struct imx274_mode *mode;
};
#define IMX274_ROUND(dim, step, flags) \
((flags) & V4L2_SEL_FLAG_GE \
? roundup((dim), (step)) \
: ((flags) & V4L2_SEL_FLAG_LE \
? rounddown((dim), (step)) \
: rounddown((dim) + (step) / 2, (step))))
/*
* Function declaration
*/
static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl);
static int imx274_set_exposure(struct stimx274 *priv, int val);
static int imx274_set_vflip(struct stimx274 *priv, int val);
static int imx274_set_test_pattern(struct stimx274 *priv, int val);
static int imx274_set_frame_interval(struct stimx274 *priv,
struct v4l2_fract frame_interval);
static inline void msleep_range(unsigned int delay_base)
{
usleep_range(delay_base * 1000, delay_base * 1000 + 500);
}
/*
* v4l2_ctrl and v4l2_subdev related operations
*/
static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler,
struct stimx274, ctrls.handler)->sd;
}
static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd)
{
return container_of(sd, struct stimx274, sd);
}
/*
* Writing a register table
*
* @priv: Pointer to device
* @table: Table containing register values (with optional delays)
*
* This is used to write register table into sensor's reg map.
*
* Return: 0 on success, errors otherwise
*/
static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[])
{
struct regmap *regmap = priv->regmap;
int err = 0;
const struct reg_8 *next;
u8 val;
int range_start = -1;
int range_count = 0;
u8 range_vals[16];
int max_range_vals = ARRAY_SIZE(range_vals);
for (next = table;; next++) {
if ((next->addr != range_start + range_count) ||
(next->addr == IMX274_TABLE_END) ||
(next->addr == IMX274_TABLE_WAIT_MS) ||
(range_count == max_range_vals)) {
if (range_count == 1)
err = regmap_write(regmap,
range_start, range_vals[0]);
else if (range_count > 1)
err = regmap_bulk_write(regmap, range_start,
&range_vals[0],
range_count);
else
err = 0;
if (err)
return err;
range_start = -1;
range_count = 0;
/* Handle special address values */
if (next->addr == IMX274_TABLE_END)
break;
if (next->addr == IMX274_TABLE_WAIT_MS) {
msleep_range(next->val);
continue;
}
}
val = next->val;
if (range_start == -1)
range_start = next->addr;
range_vals[range_count++] = val;
}
return 0;
}
static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val)
{
int err;
err = regmap_write(priv->regmap, addr, val);
if (err)
dev_err(&priv->client->dev,
"%s : i2c write failed, %x = %x\n", __func__,
addr, val);
else
dev_dbg(&priv->client->dev,
"%s : addr 0x%x, val=0x%x\n", __func__,
addr, val);
return err;
}
/**
* imx274_read_mbreg - Read a multibyte register.
*
* Uses a bulk read where possible.
*
* @priv: Pointer to device structure
* @addr: Address of the LSB register. Other registers must be
* consecutive, least-to-most significant.
* @val: Pointer to store the register value (cpu endianness)
* @nbytes: Number of bytes to read (range: [1..3]).
* Other bytes are zet to 0.
*
* Return: 0 on success, errors otherwise
*/
static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val,
size_t nbytes)
{
__le32 val_le = 0;
int err;
err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes);
if (err) {
dev_err(&priv->client->dev,
"%s : i2c bulk read failed, %x (%zu bytes)\n",
__func__, addr, nbytes);
} else {
*val = le32_to_cpu(val_le);
dev_dbg(&priv->client->dev,
"%s : addr 0x%x, val=0x%x (%zu bytes)\n",
__func__, addr, *val, nbytes);
}
return err;
}
/**
* imx274_write_mbreg - Write a multibyte register.
*
* Uses a bulk write where possible.
*
* @priv: Pointer to device structure
* @addr: Address of the LSB register. Other registers must be
* consecutive, least-to-most significant.
* @val: Value to be written to the register (cpu endianness)
* @nbytes: Number of bytes to write (range: [1..3])
*/
static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val,
size_t nbytes)
{
__le32 val_le = cpu_to_le32(val);
int err;
err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes);
if (err)
dev_err(&priv->client->dev,
"%s : i2c bulk write failed, %x = %x (%zu bytes)\n",
__func__, addr, val, nbytes);
else
dev_dbg(&priv->client->dev,
"%s : addr 0x%x, val=0x%x (%zu bytes)\n",
__func__, addr, val, nbytes);
return err;
}
/*
* Set mode registers to start stream.
* @priv: Pointer to device structure
*
* Return: 0 on success, errors otherwise
*/
static int imx274_mode_regs(struct stimx274 *priv)
{
int err = 0;
err = imx274_write_table(priv, imx274_start_1);
if (err)
return err;
err = imx274_write_table(priv, priv->mode->init_regs);
return err;
}
/*
* imx274_start_stream - Function for starting stream per mode index
* @priv: Pointer to device structure
*
* Return: 0 on success, errors otherwise
*/
static int imx274_start_stream(struct stimx274 *priv)
{
int err = 0;
err = __v4l2_ctrl_handler_setup(&priv->ctrls.handler);
if (err) {
dev_err(&priv->client->dev, "Error %d setup controls\n", err);
return err;
}
/*
* Refer to "Standby Cancel Sequence when using CSI-2" in
* imx274 datasheet, it should wait 10ms or more here.
* give it 1 extra ms for margin
*/
msleep_range(11);
err = imx274_write_table(priv, imx274_start_2);
if (err)
return err;
/*
* Refer to "Standby Cancel Sequence when using CSI-2" in
* imx274 datasheet, it should wait 7ms or more here.
* give it 1 extra ms for margin
*/
msleep_range(8);
err = imx274_write_table(priv, imx274_start_3);
if (err)
return err;
return 0;
}
/*
* imx274_reset - Function called to reset the sensor
* @priv: Pointer to device structure
* @rst: Input value for determining the sensor's end state after reset
*
* Set the senor in reset and then
* if rst = 0, keep it in reset;
* if rst = 1, bring it out of reset.
*
*/
static void imx274_reset(struct stimx274 *priv, int rst)
{
gpiod_set_value_cansleep(priv->reset_gpio, 0);
usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);
gpiod_set_value_cansleep(priv->reset_gpio, !!rst);
usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);
}
static int imx274_power_on(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct stimx274 *imx274 = to_imx274(sd);
int ret;
/* keep sensor in reset before power on */
imx274_reset(imx274, 0);
ret = clk_prepare_enable(imx274->inck);
if (ret) {
dev_err(&imx274->client->dev,
"Failed to enable input clock: %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(IMX274_NUM_SUPPLIES, imx274->supplies);
if (ret) {
dev_err(&imx274->client->dev,
"Failed to enable regulators: %d\n", ret);
goto fail_reg;
}
udelay(2);
imx274_reset(imx274, 1);
return 0;
fail_reg:
clk_disable_unprepare(imx274->inck);
return ret;
}
static int imx274_power_off(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct stimx274 *imx274 = to_imx274(sd);
imx274_reset(imx274, 0);
regulator_bulk_disable(IMX274_NUM_SUPPLIES, imx274->supplies);
clk_disable_unprepare(imx274->inck);
return 0;
}
static int imx274_regulators_get(struct device *dev, struct stimx274 *imx274)
{
unsigned int i;
for (i = 0; i < IMX274_NUM_SUPPLIES; i++)
imx274->supplies[i].supply = imx274_supply_names[i];
return devm_regulator_bulk_get(dev, IMX274_NUM_SUPPLIES,
imx274->supplies);
}
/**
* imx274_s_ctrl - This is used to set the imx274 V4L2 controls
* @ctrl: V4L2 control to be set
*
* This function is used to set the V4L2 controls for the imx274 sensor.
*
* Return: 0 on success, errors otherwise
*/
static int imx274_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
struct stimx274 *imx274 = to_imx274(sd);
int ret = -EINVAL;
if (!pm_runtime_get_if_in_use(&imx274->client->dev))
return 0;
dev_dbg(&imx274->client->dev,
"%s : s_ctrl: %s, value: %d\n", __func__,
ctrl->name, ctrl->val);
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
dev_dbg(&imx274->client->dev,
"%s : set V4L2_CID_EXPOSURE\n", __func__);
ret = imx274_set_exposure(imx274, ctrl->val);
break;
case V4L2_CID_GAIN:
dev_dbg(&imx274->client->dev,
"%s : set V4L2_CID_GAIN\n", __func__);
ret = imx274_set_gain(imx274, ctrl);
break;
case V4L2_CID_VFLIP:
dev_dbg(&imx274->client->dev,
"%s : set V4L2_CID_VFLIP\n", __func__);
ret = imx274_set_vflip(imx274, ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
dev_dbg(&imx274->client->dev,
"%s : set V4L2_CID_TEST_PATTERN\n", __func__);
ret = imx274_set_test_pattern(imx274, ctrl->val);
break;
}
pm_runtime_put(&imx274->client->dev);
return ret;
}
static int imx274_binning_goodness(struct stimx274 *imx274,
int w, int ask_w,
int h, int ask_h, u32 flags)
{
struct device *dev = &imx274->client->dev;
const int goodness = 100000;
int val = 0;
if (flags & V4L2_SEL_FLAG_GE) {
if (w < ask_w)
val -= goodness;
if (h < ask_h)
val -= goodness;
}
if (flags & V4L2_SEL_FLAG_LE) {
if (w > ask_w)
val -= goodness;
if (h > ask_h)
val -= goodness;
}
val -= abs(w - ask_w);
val -= abs(h - ask_h);
dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n",
__func__, ask_w, ask_h, w, h, val);
return val;
}
/**
* __imx274_change_compose - Helper function to change binning and set both
* compose and format.
*
* We have two entry points to change binning: set_fmt and
* set_selection(COMPOSE). Both have to compute the new output size
* and set it in both the compose rect and the frame format size. We
* also need to do the same things after setting cropping to restore
* 1:1 binning.
*
* This function contains the common code for these three cases, it
* has many arguments in order to accommodate the needs of all of
* them.
*
* Must be called with imx274->lock locked.
*
* @imx274: The device object
* @sd_state: The subdev state we are editing for TRY requests
* @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller
* @width: Input-output parameter: set to the desired width before
* the call, contains the chosen value after returning successfully
* @height: Input-output parameter for height (see @width)
* @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not
* available (when called from set_fmt)
*/
static int __imx274_change_compose(struct stimx274 *imx274,
struct v4l2_subdev_state *sd_state,
u32 which,
u32 *width,
u32 *height,
u32 flags)
{
struct device *dev = &imx274->client->dev;
const struct v4l2_rect *cur_crop;
struct v4l2_mbus_framefmt *tgt_fmt;
unsigned int i;
const struct imx274_mode *best_mode = &imx274_modes[0];
int best_goodness = INT_MIN;
if (which == V4L2_SUBDEV_FORMAT_TRY) {
cur_crop = &sd_state->pads->try_crop;
tgt_fmt = &sd_state->pads->try_fmt;
} else {
cur_crop = &imx274->crop;
tgt_fmt = &imx274->format;
}
for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) {
u8 wratio = imx274_modes[i].wbin_ratio;
u8 hratio = imx274_modes[i].hbin_ratio;
int goodness = imx274_binning_goodness(
imx274,
cur_crop->width / wratio, *width,
cur_crop->height / hratio, *height,
flags);
if (goodness >= best_goodness) {
best_goodness = goodness;
best_mode = &imx274_modes[i];
}
}
*width = cur_crop->width / best_mode->wbin_ratio;
*height = cur_crop->height / best_mode->hbin_ratio;
if (which == V4L2_SUBDEV_FORMAT_ACTIVE)
imx274->mode = best_mode;
dev_dbg(dev, "%s: selected %ux%u binning\n",
__func__, best_mode->wbin_ratio, best_mode->hbin_ratio);
tgt_fmt->width = *width;
tgt_fmt->height = *height;
tgt_fmt->field = V4L2_FIELD_NONE;
return 0;
}
/**
* imx274_get_fmt - Get the pad format
* @sd: Pointer to V4L2 Sub device structure
* @sd_state: Pointer to sub device state structure
* @fmt: Pointer to pad level media bus format
*
* This function is used to get the pad format information.
*
* Return: 0 on success
*/
static int imx274_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct stimx274 *imx274 = to_imx274(sd);
mutex_lock(&imx274->lock);
fmt->format = imx274->format;
mutex_unlock(&imx274->lock);
return 0;
}
/**
* imx274_set_fmt - This is used to set the pad format
* @sd: Pointer to V4L2 Sub device structure
* @sd_state: Pointer to sub device state information structure
* @format: Pointer to pad level media bus format
*
* This function is used to set the pad format.
*
* Return: 0 on success
*/
static int imx274_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 stimx274 *imx274 = to_imx274(sd);
int err = 0;
mutex_lock(&imx274->lock);
err = __imx274_change_compose(imx274, sd_state, format->which,
&fmt->width, &fmt->height, 0);
if (err)
goto out;
/*
* __imx274_change_compose already set width and height in the
* applicable format, but we need to keep all other format
* values, so do a full copy here
*/
fmt->field = V4L2_FIELD_NONE;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
sd_state->pads->try_fmt = *fmt;
else
imx274->format = *fmt;
out:
mutex_unlock(&imx274->lock);
return err;
}
static int imx274_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct stimx274 *imx274 = to_imx274(sd);
const struct v4l2_rect *src_crop;
const struct v4l2_mbus_framefmt *src_fmt;
int ret = 0;
if (sel->pad != 0)
return -EINVAL;
if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) {
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = IMX274_MAX_WIDTH;
sel->r.height = IMX274_MAX_HEIGHT;
return 0;
}
if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
src_crop = &sd_state->pads->try_crop;
src_fmt = &sd_state->pads->try_fmt;
} else {
src_crop = &imx274->crop;
src_fmt = &imx274->format;
}
mutex_lock(&imx274->lock);
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
sel->r = *src_crop;
break;
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = src_crop->width;
sel->r.height = src_crop->height;
break;
case V4L2_SEL_TGT_COMPOSE:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = src_fmt->width;
sel->r.height = src_fmt->height;
break;
default:
ret = -EINVAL;
}
mutex_unlock(&imx274->lock);
return ret;
}
static int imx274_set_selection_crop(struct stimx274 *imx274,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct v4l2_rect *tgt_crop;
struct v4l2_rect new_crop;
bool size_changed;
/*
* h_step could be 12 or 24 depending on the binning. But we
* won't know the binning until we choose the mode later in
* __imx274_change_compose(). Thus let's be safe and use the
* most conservative value in all cases.
*/
const u32 h_step = 24;
new_crop.width = min_t(u32,
IMX274_ROUND(sel->r.width, h_step, sel->flags),
IMX274_MAX_WIDTH);
/* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */
if (new_crop.width < 144)
new_crop.width = 144;
new_crop.left = min_t(u32,
IMX274_ROUND(sel->r.left, h_step, 0),
IMX274_MAX_WIDTH - new_crop.width);
new_crop.height = min_t(u32,
IMX274_ROUND(sel->r.height, 2, sel->flags),
IMX274_MAX_HEIGHT);
new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0),
IMX274_MAX_HEIGHT - new_crop.height);
sel->r = new_crop;
if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
tgt_crop = &sd_state->pads->try_crop;
else
tgt_crop = &imx274->crop;
mutex_lock(&imx274->lock);
size_changed = (new_crop.width != tgt_crop->width ||
new_crop.height != tgt_crop->height);
/* __imx274_change_compose needs the new size in *tgt_crop */
*tgt_crop = new_crop;
/* if crop size changed then reset the output image size */
if (size_changed)
__imx274_change_compose(imx274, sd_state, sel->which,
&new_crop.width, &new_crop.height,
sel->flags);
mutex_unlock(&imx274->lock);
return 0;
}
static int imx274_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct stimx274 *imx274 = to_imx274(sd);
if (sel->pad != 0)
return -EINVAL;
if (sel->target == V4L2_SEL_TGT_CROP)
return imx274_set_selection_crop(imx274, sd_state, sel);
if (sel->target == V4L2_SEL_TGT_COMPOSE) {
int err;
mutex_lock(&imx274->lock);
err = __imx274_change_compose(imx274, sd_state, sel->which,
&sel->r.width, &sel->r.height,
sel->flags);
mutex_unlock(&imx274->lock);
/*
* __imx274_change_compose already set width and
* height in set->r, we still need to set top-left
*/
if (!err) {
sel->r.top = 0;
sel->r.left = 0;
}
return err;
}
return -EINVAL;
}
static int imx274_apply_trimming(struct stimx274 *imx274)
{
u32 h_start;
u32 h_end;
u32 hmax;
u32 v_cut;
s32 v_pos;
u32 write_v_size;
u32 y_out_size;
int err;
h_start = imx274->crop.left + 12;
h_end = h_start + imx274->crop.width;
/* Use the minimum allowed value of HMAX */
/* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */
/* Note: 260 is the minimum HMAX in all implemented modes */
hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23);
/* invert v_pos if VFLIP */
v_pos = imx274->ctrls.vflip->cur.val ?
(-imx274->crop.top / 2) : (imx274->crop.top / 2);
v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2;
write_v_size = imx274->crop.height + 22;
y_out_size = imx274->crop.height;
err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB,
h_start, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB,
h_end, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB,
v_cut, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB,
v_pos, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB,
write_v_size, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB,
y_out_size, 2);
return err;
}
/**
* imx274_g_frame_interval - Get the frame interval
* @sd: Pointer to V4L2 Sub device structure
* @fi: Pointer to V4l2 Sub device frame interval structure
*
* This function is used to get the frame interval.
*
* Return: 0 on success
*/
static int imx274_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *fi)
{
struct stimx274 *imx274 = to_imx274(sd);
fi->interval = imx274->frame_interval;
dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n",
__func__, imx274->frame_interval.numerator,
imx274->frame_interval.denominator);
return 0;
}
/**
* imx274_s_frame_interval - Set the frame interval
* @sd: Pointer to V4L2 Sub device structure
* @fi: Pointer to V4l2 Sub device frame interval structure
*
* This function is used to set the frame intervavl.
*
* Return: 0 on success
*/
static int imx274_s_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *fi)
{
struct stimx274 *imx274 = to_imx274(sd);
struct v4l2_ctrl *ctrl = imx274->ctrls.exposure;
int min, max, def;
int ret;
ret = pm_runtime_resume_and_get(&imx274->client->dev);
if (ret < 0)
return ret;
mutex_lock(&imx274->lock);
ret = imx274_set_frame_interval(imx274, fi->interval);
if (!ret) {
fi->interval = imx274->frame_interval;
/*
* exposure time range is decided by frame interval
* need to update it after frame interval changes
*/
min = IMX274_MIN_EXPOSURE_TIME;
max = fi->interval.numerator * 1000000
/ fi->interval.denominator;
def = max;
ret = __v4l2_ctrl_modify_range(ctrl, min, max, 1, def);
if (ret) {
dev_err(&imx274->client->dev,
"Exposure ctrl range update failed\n");
goto unlock;
}
/* update exposure time accordingly */
imx274_set_exposure(imx274, ctrl->val);
dev_dbg(&imx274->client->dev, "set frame interval to %uus\n",
fi->interval.numerator * 1000000
/ fi->interval.denominator);
}
unlock:
mutex_unlock(&imx274->lock);
pm_runtime_put(&imx274->client->dev);
return ret;
}
/**
* imx274_load_default - load default control values
* @priv: Pointer to device structure
*
* Return: 0 on success, errors otherwise
*/
static void imx274_load_default(struct stimx274 *priv)
{
/* load default control values */
priv->frame_interval.numerator = 1;
priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE;
priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE;
priv->ctrls.gain->val = IMX274_DEF_GAIN;
priv->ctrls.vflip->val = 0;
priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED;
}
/**
* imx274_s_stream - It is used to start/stop the streaming.
* @sd: V4L2 Sub device
* @on: Flag (True / False)
*
* This function controls the start or stop of streaming for the
* imx274 sensor.
*
* Return: 0 on success, errors otherwise
*/
static int imx274_s_stream(struct v4l2_subdev *sd, int on)
{
struct stimx274 *imx274 = to_imx274(sd);
int ret = 0;
dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__,
on ? "Stream Start" : "Stream Stop",
imx274->mode - &imx274_modes[0]);
mutex_lock(&imx274->lock);
if (on) {
ret = pm_runtime_resume_and_get(&imx274->client->dev);
if (ret < 0) {
mutex_unlock(&imx274->lock);
return ret;
}
/* load mode registers */
ret = imx274_mode_regs(imx274);
if (ret)
goto fail;
ret = imx274_apply_trimming(imx274);
if (ret)
goto fail;
/*
* update frame rate & exposure. if the last mode is different,
* HMAX could be changed. As the result, frame rate & exposure
* are changed.
* gain is not affected.
*/
ret = imx274_set_frame_interval(imx274,
imx274->frame_interval);
if (ret)
goto fail;
/* start stream */
ret = imx274_start_stream(imx274);
if (ret)
goto fail;
} else {
/* stop stream */
ret = imx274_write_table(imx274, imx274_stop);
if (ret)
goto fail;
pm_runtime_put(&imx274->client->dev);
}
mutex_unlock(&imx274->lock);
dev_dbg(&imx274->client->dev, "%s : Done\n", __func__);
return 0;
fail:
pm_runtime_put(&imx274->client->dev);
mutex_unlock(&imx274->lock);
dev_err(&imx274->client->dev, "s_stream failed\n");
return ret;
}
/*
* imx274_get_frame_length - Function for obtaining current frame length
* @priv: Pointer to device structure
* @val: Pointer to obtained value
*
* frame_length = vmax x (svr + 1), in unit of hmax.
*
* Return: 0 on success
*/
static int imx274_get_frame_length(struct stimx274 *priv, u32 *val)
{
int err;
u32 svr;
u32 vmax;
err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2);
if (err)
goto fail;
err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3);
if (err)
goto fail;
*val = vmax * (svr + 1);
return 0;
fail:
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val,
u32 *frame_length)
{
int err;
err = imx274_get_frame_length(priv, frame_length);
if (err)
return err;
if (*frame_length < priv->mode->min_frame_len)
*frame_length = priv->mode->min_frame_len;
*val = *frame_length - *val; /* convert to raw shr */
if (*val > *frame_length - IMX274_SHR_LIMIT_CONST)
*val = *frame_length - IMX274_SHR_LIMIT_CONST;
else if (*val < priv->mode->min_SHR)
*val = priv->mode->min_SHR;
return 0;
}
/*
* imx274_set_digital gain - Function called when setting digital gain
* @priv: Pointer to device structure
* @dgain: Value of digital gain.
*
* Digital gain has only 4 steps: 1x, 2x, 4x, and 8x
*
* Return: 0 on success
*/
static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain)
{
u8 reg_val;
reg_val = ffs(dgain);
if (reg_val)
reg_val--;
reg_val = clamp(reg_val, (u8)0, (u8)3);
return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG,
reg_val & IMX274_MASK_LSB_4_BITS);
}
/*
* imx274_set_gain - Function called when setting gain
* @priv: Pointer to device structure
* @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT;
* @ctrl: v4l2 control pointer
*
* Set the gain based on input value.
* The caller should hold the mutex lock imx274->lock if necessary
*
* Return: 0 on success
*/
static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl)
{
int err;
u32 gain, analog_gain, digital_gain, gain_reg;
gain = (u32)(ctrl->val);
dev_dbg(&priv->client->dev,
"%s : input gain = %d.%d\n", __func__,
gain >> IMX274_GAIN_SHIFT,
((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT);
if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN)
gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN;
else if (gain < IMX274_MIN_GAIN)
gain = IMX274_MIN_GAIN;
if (gain <= IMX274_MAX_ANALOG_GAIN)
digital_gain = 1;
else if (gain <= IMX274_MAX_ANALOG_GAIN * 2)
digital_gain = 2;
else if (gain <= IMX274_MAX_ANALOG_GAIN * 4)
digital_gain = 4;
else
digital_gain = IMX274_MAX_DIGITAL_GAIN;
analog_gain = gain / digital_gain;
dev_dbg(&priv->client->dev,
"%s : digital gain = %d, analog gain = %d.%d\n",
__func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT,
((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100)
>> IMX274_GAIN_SHIFT);
err = imx274_set_digital_gain(priv, digital_gain);
if (err)
goto fail;
/* convert to register value, refer to imx274 datasheet */
gain_reg = (u32)IMX274_GAIN_CONST -
(IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain;
if (gain_reg > IMX274_GAIN_REG_MAX)
gain_reg = IMX274_GAIN_REG_MAX;
err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg,
2);
if (err)
goto fail;
if (IMX274_GAIN_CONST - gain_reg == 0) {
err = -EINVAL;
goto fail;
}
/* convert register value back to gain value */
ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT)
/ (IMX274_GAIN_CONST - gain_reg) * digital_gain;
dev_dbg(&priv->client->dev,
"%s : GAIN control success, gain_reg = %d, new gain = %d\n",
__func__, gain_reg, ctrl->val);
return 0;
fail:
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
/*
* imx274_set_coarse_time - Function called when setting SHR value
* @priv: Pointer to device structure
* @val: Value for exposure time in number of line_length, or [HMAX]
*
* Set SHR value based on input value.
*
* Return: 0 on success
*/
static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val)
{
int err;
u32 coarse_time, frame_length;
coarse_time = *val;
/* convert exposure_time to appropriate SHR value */
err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length);
if (err)
goto fail;
err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2);
if (err)
goto fail;
*val = frame_length - coarse_time;
return 0;
fail:
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
/*
* imx274_set_exposure - Function called when setting exposure time
* @priv: Pointer to device structure
* @val: Variable for exposure time, in the unit of micro-second
*
* Set exposure time based on input value.
* The caller should hold the mutex lock imx274->lock if necessary
*
* Return: 0 on success
*/
static int imx274_set_exposure(struct stimx274 *priv, int val)
{
int err;
u32 hmax;
u32 coarse_time; /* exposure time in unit of line (HMAX)*/
dev_dbg(&priv->client->dev,
"%s : EXPOSURE control input = %d\n", __func__, val);
/* step 1: convert input exposure_time (val) into number of 1[HMAX] */
err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2);
if (err)
goto fail;
if (hmax == 0) {
err = -EINVAL;
goto fail;
}
coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val
- priv->mode->nocpiop) / hmax;
/* step 2: convert exposure_time into SHR value */
/* set SHR */
err = imx274_set_coarse_time(priv, &coarse_time);
if (err)
goto fail;
priv->ctrls.exposure->val =
(coarse_time * hmax + priv->mode->nocpiop)
/ (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2);
dev_dbg(&priv->client->dev,
"%s : EXPOSURE control success\n", __func__);
return 0;
fail:
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
/*
* imx274_set_vflip - Function called when setting vertical flip
* @priv: Pointer to device structure
* @val: Value for vflip setting
*
* Set vertical flip based on input value.
* val = 0: normal, no vertical flip
* val = 1: vertical flip enabled
* The caller should hold the mutex lock imx274->lock if necessary
*
* Return: 0 on success
*/
static int imx274_set_vflip(struct stimx274 *priv, int val)
{
int err;
err = imx274_write_reg(priv, IMX274_VFLIP_REG, val);
if (err) {
dev_err(&priv->client->dev, "VFLIP control error\n");
return err;
}
dev_dbg(&priv->client->dev,
"%s : VFLIP control success\n", __func__);
return 0;
}
/*
* imx274_set_test_pattern - Function called when setting test pattern
* @priv: Pointer to device structure
* @val: Variable for test pattern
*
* Set to different test patterns based on input value.
*
* Return: 0 on success
*/
static int imx274_set_test_pattern(struct stimx274 *priv, int val)
{
int err = 0;
if (val == TEST_PATTERN_DISABLED) {
err = imx274_write_table(priv, imx274_tp_disabled);
} else if (val <= TEST_PATTERN_V_COLOR_BARS) {
err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1);
if (!err)
err = imx274_write_table(priv, imx274_tp_regs);
} else {
err = -EINVAL;
}
if (!err)
dev_dbg(&priv->client->dev,
"%s : TEST PATTERN control success\n", __func__);
else
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
/*
* imx274_set_frame_length - Function called when setting frame length
* @priv: Pointer to device structure
* @val: Variable for frame length (= VMAX, i.e. vertical drive period length)
*
* Set frame length based on input value.
*
* Return: 0 on success
*/
static int imx274_set_frame_length(struct stimx274 *priv, u32 val)
{
int err;
u32 frame_length;
dev_dbg(&priv->client->dev, "%s : input length = %d\n",
__func__, val);
frame_length = (u32)val;
err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3);
if (err)
goto fail;
return 0;
fail:
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
/*
* imx274_set_frame_interval - Function called when setting frame interval
* @priv: Pointer to device structure
* @frame_interval: Variable for frame interval
*
* Change frame interval by updating VMAX value
* The caller should hold the mutex lock imx274->lock if necessary
*
* Return: 0 on success
*/
static int imx274_set_frame_interval(struct stimx274 *priv,
struct v4l2_fract frame_interval)
{
int err;
u32 frame_length, req_frame_rate;
u32 svr;
u32 hmax;
dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d",
__func__, frame_interval.numerator,
frame_interval.denominator);
if (frame_interval.numerator == 0 || frame_interval.denominator == 0) {
frame_interval.denominator = IMX274_DEF_FRAME_RATE;
frame_interval.numerator = 1;
}
req_frame_rate = (u32)(frame_interval.denominator
/ frame_interval.numerator);
/* boundary check */
if (req_frame_rate > priv->mode->max_fps) {
frame_interval.numerator = 1;
frame_interval.denominator = priv->mode->max_fps;
} else if (req_frame_rate < IMX274_MIN_FRAME_RATE) {
frame_interval.numerator = 1;
frame_interval.denominator = IMX274_MIN_FRAME_RATE;
}
/*
* VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX
* frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX
*/
err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2);
if (err)
goto fail;
dev_dbg(&priv->client->dev,
"%s : register SVR = %d\n", __func__, svr);
err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2);
if (err)
goto fail;
dev_dbg(&priv->client->dev,
"%s : register HMAX = %d\n", __func__, hmax);
if (hmax == 0 || frame_interval.denominator == 0) {
err = -EINVAL;
goto fail;
}
frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax
* frame_interval.numerator
/ frame_interval.denominator;
err = imx274_set_frame_length(priv, frame_length);
if (err)
goto fail;
priv->frame_interval = frame_interval;
return 0;
fail:
dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
return err;
}
static int imx274_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index > 0)
return -EINVAL;
/* only supported format in the driver is Raw 10 bits SRGGB */
code->code = MEDIA_BUS_FMT_SRGGB10_1X10;
return 0;
}
static const struct v4l2_subdev_pad_ops imx274_pad_ops = {
.enum_mbus_code = imx274_enum_mbus_code,
.get_fmt = imx274_get_fmt,
.set_fmt = imx274_set_fmt,
.get_selection = imx274_get_selection,
.set_selection = imx274_set_selection,
};
static const struct v4l2_subdev_video_ops imx274_video_ops = {
.g_frame_interval = imx274_g_frame_interval,
.s_frame_interval = imx274_s_frame_interval,
.s_stream = imx274_s_stream,
};
static const struct v4l2_subdev_ops imx274_subdev_ops = {
.pad = &imx274_pad_ops,
.video = &imx274_video_ops,
};
static const struct v4l2_ctrl_ops imx274_ctrl_ops = {
.s_ctrl = imx274_s_ctrl,
};
static const struct of_device_id imx274_of_id_table[] = {
{ .compatible = "sony,imx274" },
{ }
};
MODULE_DEVICE_TABLE(of, imx274_of_id_table);
static const struct i2c_device_id imx274_id[] = {
{ "IMX274", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, imx274_id);
static int imx274_fwnode_parse(struct device *dev)
{
struct fwnode_handle *endpoint;
/* Only CSI2 is supported */
struct v4l2_fwnode_endpoint ep = {
.bus_type = V4L2_MBUS_CSI2_DPHY
};
int ret;
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_parse(endpoint, &ep);
fwnode_handle_put(endpoint);
if (ret == -ENXIO) {
dev_err(dev, "Unsupported bus type, should be CSI2\n");
return ret;
} else if (ret) {
dev_err(dev, "Parsing endpoint node failed %d\n", ret);
return ret;
}
/* Check number of data lanes, only 4 lanes supported */
if (ep.bus.mipi_csi2.num_data_lanes != 4) {
dev_err(dev, "Invalid data lanes: %d\n",
ep.bus.mipi_csi2.num_data_lanes);
return -EINVAL;
}
return 0;
}
static int imx274_probe(struct i2c_client *client)
{
struct v4l2_subdev *sd;
struct stimx274 *imx274;
struct device *dev = &client->dev;
int ret;
/* initialize imx274 */
imx274 = devm_kzalloc(dev, sizeof(*imx274), GFP_KERNEL);
if (!imx274)
return -ENOMEM;
mutex_init(&imx274->lock);
ret = imx274_fwnode_parse(dev);
if (ret)
return ret;
imx274->inck = devm_clk_get_optional(dev, "inck");
if (IS_ERR(imx274->inck))
return PTR_ERR(imx274->inck);
ret = imx274_regulators_get(dev, imx274);
if (ret) {
dev_err(dev, "Failed to get power regulators, err: %d\n", ret);
return ret;
}
/* initialize format */
imx274->mode = &imx274_modes[0];
imx274->crop.width = IMX274_MAX_WIDTH;
imx274->crop.height = IMX274_MAX_HEIGHT;
imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio;
imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio;
imx274->format.field = V4L2_FIELD_NONE;
imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
imx274->format.colorspace = V4L2_COLORSPACE_SRGB;
imx274->frame_interval.numerator = 1;
imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE;
/* initialize regmap */
imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config);
if (IS_ERR(imx274->regmap)) {
dev_err(dev,
"regmap init failed: %ld\n", PTR_ERR(imx274->regmap));
ret = -ENODEV;
goto err_regmap;
}
/* initialize subdevice */
imx274->client = client;
sd = &imx274->sd;
v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
/* initialize subdev media pad */
imx274->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad);
if (ret < 0) {
dev_err(dev,
"%s : media entity init Failed %d\n", __func__, ret);
goto err_regmap;
}
/* initialize sensor reset gpio */
imx274->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(imx274->reset_gpio)) {
if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER)
dev_err(dev, "Reset GPIO not setup in DT");
ret = PTR_ERR(imx274->reset_gpio);
goto err_me;
}
/* power on the sensor */
ret = imx274_power_on(dev);
if (ret < 0) {
dev_err(dev, "%s : imx274 power on failed\n", __func__);
goto err_me;
}
/* initialize controls */
ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4);
if (ret < 0) {
dev_err(dev, "%s : ctrl handler init Failed\n", __func__);
goto err_power_off;
}
imx274->ctrls.handler.lock = &imx274->lock;
/* add new controls */
imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items(
&imx274->ctrls.handler, &imx274_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu);
imx274->ctrls.gain = v4l2_ctrl_new_std(
&imx274->ctrls.handler,
&imx274_ctrl_ops,
V4L2_CID_GAIN, IMX274_MIN_GAIN,
IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1,
IMX274_DEF_GAIN);
imx274->ctrls.exposure = v4l2_ctrl_new_std(
&imx274->ctrls.handler,
&imx274_ctrl_ops,
V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME,
1000000 / IMX274_DEF_FRAME_RATE, 1,
IMX274_MIN_EXPOSURE_TIME);
imx274->ctrls.vflip = v4l2_ctrl_new_std(
&imx274->ctrls.handler,
&imx274_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
imx274->sd.ctrl_handler = &imx274->ctrls.handler;
if (imx274->ctrls.handler.error) {
ret = imx274->ctrls.handler.error;
goto err_ctrls;
}
/* load default control values */
imx274_load_default(imx274);
/* register subdevice */
ret = v4l2_async_register_subdev(sd);
if (ret < 0) {
dev_err(dev, "%s : v4l2_async_register_subdev failed %d\n",
__func__, ret);
goto err_ctrls;
}
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
dev_info(dev, "imx274 : imx274 probe success !\n");
return 0;
err_ctrls:
v4l2_ctrl_handler_free(&imx274->ctrls.handler);
err_power_off:
imx274_power_off(dev);
err_me:
media_entity_cleanup(&sd->entity);
err_regmap:
mutex_destroy(&imx274->lock);
return ret;
}
static void imx274_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct stimx274 *imx274 = to_imx274(sd);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
imx274_power_off(&client->dev);
pm_runtime_set_suspended(&client->dev);
v4l2_async_unregister_subdev(sd);
v4l2_ctrl_handler_free(&imx274->ctrls.handler);
media_entity_cleanup(&sd->entity);
mutex_destroy(&imx274->lock);
}
static const struct dev_pm_ops imx274_pm_ops = {
SET_RUNTIME_PM_OPS(imx274_power_off, imx274_power_on, NULL)
};
static struct i2c_driver imx274_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.pm = &imx274_pm_ops,
.of_match_table = imx274_of_id_table,
},
.probe_new = imx274_probe,
.remove = imx274_remove,
.id_table = imx274_id,
};
module_i2c_driver(imx274_i2c_driver);
MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>");
MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver");
MODULE_LICENSE("GPL v2");
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