/* * imx274.c - IMX274 CMOS Image Sensor driver * * Copyright (C) 2017, Leopard Imaging, Inc. * * Leon Luo * Edwin Zou * * 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 . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * 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) /* * 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_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 /* * 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 format related structure */ struct imx274_frmfmt { struct v4l2_frmsize_discrete size; }; /* * 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 format related structure */ static const struct imx274_frmfmt imx274_formats[] = { { {3840, 2160} }, { {1920, 1080} }, { {1280, 720} }, }; /* * 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, imx274_start_1); if (err) return err; err = imx274_write_table(priv, imx274_start_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, imx274_start_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, imx274_start_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\n", __func__, fmt->width, fmt->height, fmt->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 interval 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, 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); 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, imx274_stop); 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, ®_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_VMAX_REG_3, ®_val[0]); if (err) goto fail; err = imx274_read_reg(priv, IMX274_VMAX_REG_2, ®_val[1]); if (err) goto fail; err = imx274_read_reg(priv, IMX274_VMAX_REG_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_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_SHR_REG_MSB; regs->val = (coarse_time >> IMX274_SHIFT_8_BITS) & IMX274_MASK_LSB_8_BITS; (regs + 1)->addr = IMX274_SHR_REG_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, ®_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]; 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, "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; } static inline void imx274_calculate_frame_length_regs(struct reg_8 regs[3], u32 frame_length) { regs->addr = IMX274_VMAX_REG_1; regs->val = (frame_length >> IMX274_SHIFT_16_BITS) & IMX274_MASK_LSB_4_BITS; (regs + 1)->addr = IMX274_VMAX_REG_2; (regs + 1)->val = (frame_length >> IMX274_SHIFT_8_BITS) & IMX274_MASK_LSB_8_BITS; (regs + 2)->addr = IMX274_VMAX_REG_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, ®_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; } 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 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; /* 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; } /* 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, imx274_stop); 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 "); MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); MODULE_LICENSE("GPL v2");