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imx274.c
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imx274.c
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/*
* imx274.c - IMX274 CMOS Image Sensor driver
*
* Copyright (C) 2017, Leopard Imaging, Inc.
*
* Leon Luo <[email protected]>
* Edwin Zou <[email protected]>
*
* 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/>.
*/
// EDITED FEB 2018
// Standalone version w/o V4L2
#include "sleep.h"
#include "s2mm_PL/emio.h"
#include "imx274.h"
#define EINVAL 22
/*
* 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;
};
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 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,
};
/*
* 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,
};
/*
* 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 */
};
static inline void msleep_range(unsigned int delay_base)
{
usleep(delay_base * 1000);
}
static inline int imx274_read_reg(struct stimx274 *priv, u16 addr, u8 *val)
{
int err;
err = iic_read(&priv->iic_ex, addr, val, 1);
//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 = iic_write(&priv->iic_ex, addr, &val, 1);
//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[]) {
const struct reg_8 *next;
iic_cmd_fifo cmd;
int ret;
iic_cmd_reset(&cmd);
for (next = table; (next->addr) != IMX274_TABLE_END; ++next) {
if (next->addr == IMX274_TABLE_WAIT_MS) {
ret = iic_cmd_wait(&priv->iic_ex, &cmd, next->val);
}
else {
ret = iic_cmd_push(&priv->iic_ex, &cmd, next->addr, next->val);
}
if (ret != 0) { return ret; }
}
return iic_cmd_flush(&priv->iic_ex, &cmd);
}
/*
* 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
*/
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
*/
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.
*
*/
void dual_imx274_reset(XGpioPs *p_emio, int rst) {
emio_set_sensor_reset(p_emio, 0);
//XGpioPs_WritePin(p_emio, EMIO_PIN_SENSOR_RESET, 0);
usleep(IMX274_RESET_DELAY1);
emio_set_sensor_reset(p_emio, !!rst);
//XGpioPs_WritePin(p_emio, EMIO_PIN_SENSOR_RESET, !!rst);
usleep(IMX274_RESET_DELAY1);
}
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 < 3/*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
*/
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, ®_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, ®_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, ®_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, ®_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;
}
/**
* 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)
int imx274_s_stream(struct stimx274 *imx274, 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_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
*/
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_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_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, ®_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, ®_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, ®_val[0]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_2, ®_val[1]);
if (err)
goto fail;
err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_1, ®_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_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 < 2/*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;
}
/*