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linux/drivers/media/i2c/imx274.c
Dan Carpenter 021741ad36 media: imx274: Silence uninitialized variable warning 
Smatch complains that "err" can be uninitialized if we have a zero size
write.  The flow analysis is a little complicated so I'm not sure if
that's possible or not, but it's harmless to set this to zero and it
makes the code easier to read.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2018-01-05 12:47:07 -05:00

1813 lines
44 KiB
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/*
* imx274.c - IMX274 CMOS Image Sensor driver
*
* Copyright (C) 2017, Leopard Imaging, Inc.
*
* Leon Luo <leonl@leopardimaging.com>
* Edwin Zou <edwinz@leopardimaging.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/regmap.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-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_DEFAULT_MODE IMX274_MODE_3840X2160
#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)
/*
* Constants for sensor reset delay
*/
#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_FRAME_LENGTH_ADDR_1 0x30FA /* VMAX, MSB */
#define IMX274_FRAME_LENGTH_ADDR_2 0x30F9 /* VMAX */
#define IMX274_FRAME_LENGTH_ADDR_3 0x30F8 /* VMAX, LSB */
#define IMX274_SVR_REG_MSB 0x300F /* SVR */
#define IMX274_SVR_REG_LSB 0x300E /* SVR */
#define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */
#define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */
#define IMX274_COARSE_TIME_ADDR_MSB 0x300D /* SHR */
#define IMX274_COARSE_TIME_ADDR_LSB 0x300C /* SHR */
#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
/*
* 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,
};
enum imx274_mode {
IMX274_MODE_3840X2160,
IMX274_MODE_1920X1080,
IMX274_MODE_1280X720,
IMX274_MODE_START_STREAM_1,
IMX274_MODE_START_STREAM_2,
IMX274_MODE_START_STREAM_3,
IMX274_MODE_START_STREAM_4,
IMX274_MODE_STOP_STREAM
};
/*
* imx274 format related structure
*/
struct imx274_frmfmt {
u32 mbus_code;
enum v4l2_colorspace colorspace;
struct v4l2_frmsize_discrete size;
enum imx274_mode mode;
};
/*
* 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)",
"Horizontal Color Bars",
"Vertical 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, 0x02},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x01},
{0x30F6, 0x07}, /* HMAX, 263 */
{0x30F7, 0x01}, /* HMAX */
{0x30dd, 0x01}, /* crop to 2160 */
{0x30de, 0x06},
{0x30df, 0x00},
{0x30e0, 0x12},
{0x30e1, 0x00},
{0x3037, 0x01}, /* to crop to 3840 */
{0x3038, 0x0c},
{0x3039, 0x00},
{0x303a, 0x0c},
{0x303b, 0x0f},
{0x30EE, 0x01},
{0x3130, 0x86},
{0x3131, 0x08},
{0x3132, 0x7E},
{0x3133, 0x08},
{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, 0x11},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x02},
{0x30F6, 0x04}, /* HMAX, 260 */
{0x30F7, 0x01}, /* HMAX */
{0x30dd, 0x01}, /* to crop to 1920x1080 */
{0x30de, 0x05},
{0x30df, 0x00},
{0x30e0, 0x04},
{0x30e1, 0x00},
{0x3037, 0x01},
{0x3038, 0x0c},
{0x3039, 0x00},
{0x303a, 0x0c},
{0x303b, 0x0f},
{0x30EE, 0x01},
{0x3130, 0x4E},
{0x3131, 0x04},
{0x3132, 0x46},
{0x3133, 0x04},
{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, 0x09},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x03},
{0x30F6, 0x04}, /* HMAX, 260 */
{0x30F7, 0x01}, /* HMAX */
{0x30DD, 0x01},
{0x30DE, 0x07},
{0x30DF, 0x00},
{0x40E0, 0x04},
{0x30E1, 0x00},
{0x3030, 0xD4},
{0x3031, 0x02},
{0x3032, 0xD0},
{0x3033, 0x02},
{0x30EE, 0x01},
{0x3130, 0xE2},
{0x3131, 0x02},
{0x3132, 0xDE},
{0x3133, 0x02},
{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}
};
/*
* imx274 first step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_1[] = {
{IMX274_STANDBY_REG, 0x12},
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 second step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_2[] = {
{0x3120, 0xF0}, /* clock settings */
{0x3121, 0x00}, /* clock settings */
{0x3122, 0x02}, /* clock settings */
{0x3129, 0x9C}, /* clock settings */
{0x312A, 0x02}, /* clock settings */
{0x312D, 0x02}, /* clock settings */
{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 third step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_3[] = {
{IMX274_STANDBY_REG, 0x00},
{0x303E, 0x02}, /* SYS_MODE = 2 */
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 forth step register configuration for
* starting stream
*/
static const struct reg_8 imx274_start_4[] = {
{0x30F4, 0x00},
{0x3018, 0xA2}, /* XHS VHS OUTUPT */
{IMX274_TABLE_END, 0x00}
};
/*
* imx274 register configuration for stoping 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}
};
static const struct reg_8 *mode_table[] = {
[IMX274_MODE_3840X2160] = imx274_mode1_3840x2160_raw10,
[IMX274_MODE_1920X1080] = imx274_mode3_1920x1080_raw10,
[IMX274_MODE_1280X720] = imx274_mode5_1280x720_raw10,
[IMX274_MODE_START_STREAM_1] = imx274_start_1,
[IMX274_MODE_START_STREAM_2] = imx274_start_2,
[IMX274_MODE_START_STREAM_3] = imx274_start_3,
[IMX274_MODE_START_STREAM_4] = imx274_start_4,
[IMX274_MODE_STOP_STREAM] = imx274_stop,
};
/*
* imx274 format related structure
*/
static const struct imx274_frmfmt imx274_formats[] = {
{MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {3840, 2160},
IMX274_MODE_3840X2160},
{MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {1920, 1080},
IMX274_MODE_1920X1080},
{MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {1280, 720},
IMX274_MODE_1280X720},
};
/*
* minimal frame length for each mode
* refer to datasheet section "Frame Rate Adjustment (CSI-2)"
*/
static const int min_frame_len[] = {
4550, /* mode 1, 4K */
2310, /* mode 3, 1080p */
2310 /* mode 5, 720p */
};
/*
* minimal numbers of SHR register
* refer to datasheet table "Shutter Setting (CSI-2)"
*/
static const int min_SHR[] = {
12, /* mode 1, 4K */
8, /* mode 3, 1080p */
8 /* mode 5, 720p */
};
static const int max_frame_rate[] = {
60, /* mode 1 , 4K */
120, /* mode 3, 1080p */
120 /* mode 5, 720p */
};
/*
* Number of clocks per internal offset period
* a constant based on mode
* refer to section "Integration Time in Each Readout Drive Mode (CSI-2)"
* in the datasheet
* for the implemented 3 modes, it happens to be the same number
*/
static const int nocpiop[] = {
112, /* mode 1 , 4K */
112, /* mode 3, 1080p */
112 /* mode 5, 720p */
};
/*
* 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
* @pd: Media pad structure
* @client: Pointer to I2C client
* @ctrls: imx274 control structure
* @format: V4L2 media bus frame format structure
* @frame_rate: V4L2 frame rate structure
* @regmap: Pointer to regmap structure
* @reset_gpio: Pointer to reset gpio
* @lock: Mutex structure
* @mode_index: Resolution mode index
*/
struct stimx274 {
struct v4l2_subdev sd;
struct media_pad pad;
struct i2c_client *client;
struct imx274_ctrls ctrls;
struct v4l2_mbus_framefmt format;
struct v4l2_fract frame_interval;
struct regmap *regmap;
struct gpio_desc *reset_gpio;
struct mutex lock; /* mutex lock for operations */
u32 mode_index;
};
/*
* 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);
}
/*
* imx274_regmap_util_write_table_8 - Function for writing register table
* @regmap: Pointer to device reg map structure
* @table: Table containing register values
* @wait_ms_addr: Flag for performing delay
* @end_addr: Flag for incating end of table
*
* This is used to write register table into sensor's reg map.
*
* Return: 0 on success, errors otherwise
*/
static int imx274_regmap_util_write_table_8(struct regmap *regmap,
const struct reg_8 table[],
u16 wait_ms_addr, u16 end_addr)
{
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 == end_addr) ||
(next->addr == wait_ms_addr) ||
(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 == end_addr)
break;
if (next->addr == wait_ms_addr) {
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_read_reg(struct stimx274 *priv, u16 addr, u8 *val)
{
int err;
err = regmap_read(priv->regmap, addr, (unsigned int *)val);
if (err)
dev_err(&priv->client->dev,
"%s : i2c read failed, addr = %x\n", __func__, addr);
else
dev_dbg(&priv->client->dev,
"%s : addr 0x%x, val=0x%x\n", __func__,
addr, *val);
return err;
}
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;
}
static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[])
{
return imx274_regmap_util_write_table_8(priv->regmap,
table, IMX274_TABLE_WAIT_MS, IMX274_TABLE_END);
}
/*
* imx274_mode_regs - Function for set mode registers per mode index
* @priv: Pointer to device structure
* @mode: Mode index value
*
* This is used to start steam per mode index.
* mode = 0, start stream for sensor Mode 1: 4K/raw10
* mode = 1, start stream for sensor Mode 3: 1080p/raw10
* mode = 2, start stream for sensor Mode 5: 720p/raw10
*
* Return: 0 on success, errors otherwise
*/
static int imx274_mode_regs(struct stimx274 *priv, int mode)
{
int err = 0;
err = imx274_write_table(priv, mode_table[IMX274_MODE_START_STREAM_1]);
if (err)
return err;
err = imx274_write_table(priv, mode_table[IMX274_MODE_START_STREAM_2]);
if (err)
return err;
err = imx274_write_table(priv, mode_table[mode]);
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;
/*
* 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, mode_table[IMX274_MODE_START_STREAM_3]);
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, mode_table[IMX274_MODE_START_STREAM_4]);
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);
}
/**
* 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;
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;
}
return ret;
}
/**
* imx274_get_fmt - Get the pad format
* @sd: Pointer to V4L2 Sub device structure
* @cfg: Pointer to sub device pad information 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_pad_config *cfg,
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
* @cfg: Pointer to sub device pad 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_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *fmt = &format->format;
struct stimx274 *imx274 = to_imx274(sd);
struct i2c_client *client = imx274->client;
int index;
dev_dbg(&client->dev,
"%s: width = %d height = %d code = %d mbus_code = %d\n",
__func__, fmt->width, fmt->height, fmt->code,
imx274_formats[imx274->mode_index].mbus_code);
mutex_lock(&imx274->lock);
for (index = 0; index < ARRAY_SIZE(imx274_formats); index++) {
if (imx274_formats[index].size.width == fmt->width &&
imx274_formats[index].size.height == fmt->height)
break;
}
if (index >= ARRAY_SIZE(imx274_formats)) {
/* default to first format */
index = 0;
}
imx274->mode_index = index;
if (fmt->width > IMX274_MAX_WIDTH)
fmt->width = IMX274_MAX_WIDTH;
if (fmt->height > IMX274_MAX_HEIGHT)
fmt->height = IMX274_MAX_HEIGHT;
fmt->width = fmt->width & (~IMX274_MASK_LSB_2_BITS);
fmt->height = fmt->height & (~IMX274_MASK_LSB_2_BITS);
fmt->field = V4L2_FIELD_NONE;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
cfg->try_fmt = *fmt;
else
imx274->format = *fmt;
mutex_unlock(&imx274->lock);
return 0;
}
/**
* 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;
mutex_lock(&imx274->lock);
ret = imx274_set_frame_interval(imx274, fi->interval);
if (!ret) {
/*
* exposure time range is decided by frame interval
* need to update it after frame interal changes
*/
min = IMX274_MIN_EXPOSURE_TIME;
max = fi->interval.numerator * 1000000
/ fi->interval.denominator;
def = max;
if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) {
dev_err(&imx274->client->dev,
"Exposure ctrl range update failed\n");
goto unlock;
}
/* update exposure time accordingly */
imx274_set_exposure(imx274, imx274->ctrls.exposure->val);
dev_dbg(&imx274->client->dev, "set frame interval to %uus\n",
fi->interval.numerator * 1000000
/ fi->interval.denominator);
}
unlock:
mutex_unlock(&imx274->lock);
return ret;
}
/**
* imx274_load_default - load default control values
* @priv: Pointer to device structure
*
* Return: 0 on success, errors otherwise
*/
static int imx274_load_default(struct stimx274 *priv)
{
int ret;
/* 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;
/* update frame rate */
ret = imx274_set_frame_interval(priv,
priv->frame_interval);
if (ret)
return ret;
/* update exposure time */
ret = v4l2_ctrl_s_ctrl(priv->ctrls.exposure, priv->ctrls.exposure->val);
if (ret)
return ret;
/* update gain */
ret = v4l2_ctrl_s_ctrl(priv->ctrls.gain, priv->ctrls.gain->val);
if (ret)
return ret;
/* update vflip */
ret = v4l2_ctrl_s_ctrl(priv->ctrls.vflip, priv->ctrls.vflip->val);
if (ret)
return ret;
return 0;
}
/**
* 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 = %d\n", __func__,
on ? "Stream Start" : "Stream Stop", imx274->mode_index);
mutex_lock(&imx274->lock);
if (on) {
/* load mode registers */
ret = imx274_mode_regs(imx274, imx274->mode_index);
if (ret)
goto fail;
/*
* update frame rate & expsoure. 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;
/* update exposure time */
ret = __v4l2_ctrl_s_ctrl(imx274->ctrls.exposure,
imx274->ctrls.exposure->val);
if (ret)
goto fail;
/* start stream */
ret = imx274_start_stream(imx274);
if (ret)
goto fail;
} else {
/* stop stream */
ret = imx274_write_table(imx274,
mode_table[IMX274_MODE_STOP_STREAM]);
if (ret)
goto fail;
}
mutex_unlock(&imx274->lock);
dev_dbg(&imx274->client->dev,
"%s : Done: mode = %d\n", __func__, imx274->mode_index);
return 0;
fail:
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 obainted 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;
u16 svr;
u32 vmax;
u8 reg_val[3];
/* svr */
err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, &reg_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, &reg_val[1]);
if (err)
goto fail;
svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
/* vmax */
err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_3, &reg_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_2, &reg_val[1]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_1, &reg_val[2]);
if (err)
goto fail;
vmax = ((reg_val[2] & IMX274_MASK_LSB_3_BITS) << IMX274_SHIFT_16_BITS)
+ (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
*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 < min_frame_len[priv->mode_index])
*frame_length = min_frame_len[priv->mode_index];
*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 < min_SHR[priv->mode_index])
*val = min_SHR[priv->mode_index];
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);
}
static inline void imx274_calculate_gain_regs(struct reg_8 regs[2], u16 gain)
{
regs->addr = IMX274_ANALOG_GAIN_ADDR_MSB;
regs->val = (gain >> IMX274_SHIFT_8_BITS) & IMX274_MASK_LSB_3_BITS;
(regs + 1)->addr = IMX274_ANALOG_GAIN_ADDR_LSB;
(regs + 1)->val = (gain) & IMX274_MASK_LSB_8_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)
{
struct reg_8 reg_list[2];
int err;
u32 gain, analog_gain, digital_gain, gain_reg;
int i;
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;
imx274_calculate_gain_regs(reg_list, (u16)gain_reg);
for (i = 0; i < ARRAY_SIZE(reg_list); i++) {
err = imx274_write_reg(priv, reg_list[i].addr,
reg_list[i].val);
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;
}
static inline void imx274_calculate_coarse_time_regs(struct reg_8 regs[2],
u32 coarse_time)
{
regs->addr = IMX274_COARSE_TIME_ADDR_MSB;
regs->val = (coarse_time >> IMX274_SHIFT_8_BITS)
& IMX274_MASK_LSB_8_BITS;
(regs + 1)->addr = IMX274_COARSE_TIME_ADDR_LSB;
(regs + 1)->val = (coarse_time) & IMX274_MASK_LSB_8_BITS;
}
/*
* 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)
{
struct reg_8 reg_list[2];
int err;
u32 coarse_time, frame_length;
int i;
coarse_time = *val;
/* convert exposure_time to appropriate SHR value */
err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length);
if (err)
goto fail;
/* prepare SHR registers */
imx274_calculate_coarse_time_regs(reg_list, coarse_time);
/* write to SHR registers */
for (i = 0; i < ARRAY_SIZE(reg_list); i++) {
err = imx274_write_reg(priv, reg_list[i].addr,
reg_list[i].val);
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;
u16 hmax;
u8 reg_val[2];
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] */
/* obtain HMAX value */
err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, &reg_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, &reg_val[1]);
if (err)
goto fail;
hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
if (hmax == 0) {
err = -EINVAL;
goto fail;
}
coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val
- nocpiop[priv->mode_index]) / 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 + nocpiop[priv->mode_index])
/ (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, "VFILP 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;
}
static inline void imx274_calculate_frame_length_regs(struct reg_8 regs[3],
u32 frame_length)
{
regs->addr = IMX274_FRAME_LENGTH_ADDR_1;
regs->val = (frame_length >> IMX274_SHIFT_16_BITS)
& IMX274_MASK_LSB_4_BITS;
(regs + 1)->addr = IMX274_FRAME_LENGTH_ADDR_2;
(regs + 1)->val = (frame_length >> IMX274_SHIFT_8_BITS)
& IMX274_MASK_LSB_8_BITS;
(regs + 2)->addr = IMX274_FRAME_LENGTH_ADDR_3;
(regs + 2)->val = (frame_length) & IMX274_MASK_LSB_8_BITS;
}
/*
* 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)
{
struct reg_8 reg_list[3];
int err;
u32 frame_length;
int i;
dev_dbg(&priv->client->dev, "%s : input length = %d\n",
__func__, val);
frame_length = (u32)val;
imx274_calculate_frame_length_regs(reg_list, frame_length);
for (i = 0; i < ARRAY_SIZE(reg_list); i++) {
err = imx274_write_reg(priv, reg_list[i].addr,
reg_list[i].val);
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;
u16 svr;
u16 hmax;
u8 reg_val[2];
dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d",
__func__, frame_interval.numerator,
frame_interval.denominator);
if (frame_interval.numerator == 0) {
err = -EINVAL;
goto fail;
}
req_frame_rate = (u32)(frame_interval.denominator
/ frame_interval.numerator);
/* boundary check */
if (req_frame_rate > max_frame_rate[priv->mode_index]) {
frame_interval.numerator = 1;
frame_interval.denominator =
max_frame_rate[priv->mode_index];
} 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
*/
/* SVR */
err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, &reg_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, &reg_val[1]);
if (err)
goto fail;
svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
dev_dbg(&priv->client->dev,
"%s : register SVR = %d\n", __func__, svr);
/* HMAX */
err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, &reg_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, &reg_val[1]);
if (err)
goto fail;
hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
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 const struct v4l2_subdev_pad_ops imx274_pad_ops = {
.get_fmt = imx274_get_fmt,
.set_fmt = imx274_set_fmt,
};
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_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct v4l2_subdev *sd;
struct stimx274 *imx274;
int ret;
/* initialize imx274 */
imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL);
if (!imx274)
return -ENOMEM;
mutex_init(&imx274->lock);
/* initialize regmap */
imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config);
if (IS_ERR(imx274->regmap)) {
dev_err(&client->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);
strlcpy(sd->name, DRIVER_NAME, sizeof(sd->name));
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(&client->dev,
"%s : media entity init Failed %d\n", __func__, ret);
goto err_regmap;
}
/* initialize sensor reset gpio */
imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(imx274->reset_gpio)) {
if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER)
dev_err(&client->dev, "Reset GPIO not setup in DT");
ret = PTR_ERR(imx274->reset_gpio);
goto err_me;
}
/* pull sensor out of reset */
imx274_reset(imx274, 1);
/* initialize controls */
ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 2);
if (ret < 0) {
dev_err(&client->dev,
"%s : ctrl handler init Failed\n", __func__);
goto err_me;
}
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;
}
/* setup default controls */
ret = v4l2_ctrl_handler_setup(&imx274->ctrls.handler);
if (ret) {
dev_err(&client->dev,
"Error %d setup default controls\n", ret);
goto err_ctrls;
}
/* initialize format */
imx274->mode_index = IMX274_MODE_3840X2160;
imx274->format.width = imx274_formats[0].size.width;
imx274->format.height = imx274_formats[0].size.height;
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;
/* load default control values */
ret = imx274_load_default(imx274);
if (ret) {
dev_err(&client->dev,
"%s : imx274_load_default failed %d\n",
__func__, ret);
goto err_ctrls;
}
/* register subdevice */
ret = v4l2_async_register_subdev(sd);
if (ret < 0) {
dev_err(&client->dev,
"%s : v4l2_async_register_subdev failed %d\n",
__func__, ret);
goto err_ctrls;
}
dev_info(&client->dev, "imx274 : imx274 probe success !\n");
return 0;
err_ctrls:
v4l2_ctrl_handler_free(&imx274->ctrls.handler);
err_me:
media_entity_cleanup(&sd->entity);
err_regmap:
mutex_destroy(&imx274->lock);
return ret;
}
static int imx274_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct stimx274 *imx274 = to_imx274(sd);
/* stop stream */
imx274_write_table(imx274, mode_table[IMX274_MODE_STOP_STREAM]);
v4l2_async_unregister_subdev(sd);
v4l2_ctrl_handler_free(&imx274->ctrls.handler);
media_entity_cleanup(&sd->entity);
mutex_destroy(&imx274->lock);
return 0;
}
static struct i2c_driver imx274_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = imx274_of_id_table,
},
.probe = 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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