| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Leon Luo | 4805 | 58.48% | 1 | 2.56% |
| Luca Ceresoli | 2072 | 25.22% | 18 | 46.15% |
| Sowjanya Komatineni | 711 | 8.65% | 1 | 2.56% |
| Eugen Hristev | 536 | 6.52% | 8 | 20.51% |
| Tomi Valkeinen | 37 | 0.45% | 1 | 2.56% |
| Hans Verkuil | 26 | 0.32% | 2 | 5.13% |
| Sakari Ailus | 10 | 0.12% | 1 | 2.56% |
| Mauro Carvalho Chehab | 8 | 0.10% | 3 | 7.69% |
| Jia-Ju Bai | 6 | 0.07% | 1 | 2.56% |
| Colin Ian King | 2 | 0.02% | 1 | 2.56% |
| Dan Carpenter | 2 | 0.02% | 1 | 2.56% |
| Kieran Bingham | 1 | 0.01% | 1 | 2.56% |
| Total | 8216 | 39 |
// SPDX-License-Identifier: GPL-2.0 /* * imx274.c - IMX274 CMOS Image Sensor driver * * Copyright (C) 2017, Leopard Imaging, Inc. * * Leon Luo <leonl@leopardimaging.com> * Edwin Zou <edwinz@leopardimaging.com> * Luca Ceresoli <luca@lucaceresoli.net> */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/v4l2-mediabus.h> #include <linux/videodev2.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-device.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-subdev.h> /* * See "SHR, SVR Setting" in datasheet */ #define IMX274_DEFAULT_FRAME_LENGTH (4550) #define IMX274_MAX_FRAME_LENGTH (0x000fffff) /* * See "Frame Rate Adjustment" in datasheet */ #define IMX274_PIXCLK_CONST1 (72000000) #define IMX274_PIXCLK_CONST2 (1000000) /* * The input gain is shifted by IMX274_GAIN_SHIFT to get * decimal number. The real gain is * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) */ #define IMX274_GAIN_SHIFT (8) #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1) /* * See "Analog Gain" and "Digital Gain" in datasheet * min gain is 1X * max gain is calculated based on IMX274_GAIN_REG_MAX */ #define IMX274_GAIN_REG_MAX (1957) #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT) #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\ / (2048 - IMX274_GAIN_REG_MAX)) #define IMX274_MAX_DIGITAL_GAIN (8) #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT) #define IMX274_GAIN_CONST (2048) /* for gain formula */ /* * 1 line time in us = (HMAX / 72), minimal is 4 lines */ #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) #define IMX274_MAX_WIDTH (3840) #define IMX274_MAX_HEIGHT (2160) #define IMX274_MAX_FRAME_RATE (120) #define IMX274_MIN_FRAME_RATE (5) #define IMX274_DEF_FRAME_RATE (60) /* * register SHR is limited to (SVR value + 1) x VMAX value - 4 */ #define IMX274_SHR_LIMIT_CONST (4) /* * Min and max sensor reset delay (microseconds) */ #define IMX274_RESET_DELAY1 (2000) #define IMX274_RESET_DELAY2 (2200) /* * shift and mask constants */ #define IMX274_SHIFT_8_BITS (8) #define IMX274_SHIFT_16_BITS (16) #define IMX274_MASK_LSB_2_BITS (0x03) #define IMX274_MASK_LSB_3_BITS (0x07) #define IMX274_MASK_LSB_4_BITS (0x0f) #define IMX274_MASK_LSB_8_BITS (0x00ff) #define DRIVER_NAME "IMX274" /* * IMX274 register definitions */ #define IMX274_SHR_REG_MSB 0x300D /* SHR */ #define IMX274_SHR_REG_LSB 0x300C /* SHR */ #define IMX274_SVR_REG_MSB 0x300F /* SVR */ #define IMX274_SVR_REG_LSB 0x300E /* SVR */ #define IMX274_HTRIM_EN_REG 0x3037 #define IMX274_HTRIM_START_REG_LSB 0x3038 #define IMX274_HTRIM_START_REG_MSB 0x3039 #define IMX274_HTRIM_END_REG_LSB 0x303A #define IMX274_HTRIM_END_REG_MSB 0x303B #define IMX274_VWIDCUTEN_REG 0x30DD #define IMX274_VWIDCUT_REG_LSB 0x30DE #define IMX274_VWIDCUT_REG_MSB 0x30DF #define IMX274_VWINPOS_REG_LSB 0x30E0 #define IMX274_VWINPOS_REG_MSB 0x30E1 #define IMX274_WRITE_VSIZE_REG_LSB 0x3130 #define IMX274_WRITE_VSIZE_REG_MSB 0x3131 #define IMX274_Y_OUT_SIZE_REG_LSB 0x3132 #define IMX274_Y_OUT_SIZE_REG_MSB 0x3133 #define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */ #define IMX274_VMAX_REG_2 0x30F9 /* VMAX */ #define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */ #define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */ #define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */ #define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */ #define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */ #define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */ #define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */ #define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */ #define IMX274_STANDBY_REG 0x3000 /* STANDBY */ #define IMX274_TABLE_WAIT_MS 0 #define IMX274_TABLE_END 1 /* regulator supplies */ static const char * const imx274_supply_names[] = { "vddl", /* IF (1.2V) supply */ "vdig", /* Digital Core (1.8V) supply */ "vana", /* Analog (2.8V) supply */ }; #define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names) /* * imx274 I2C operation related structure */ struct reg_8 { u16 addr; u8 val; }; static const struct regmap_config imx274_regmap_config = { .reg_bits = 16, .val_bits = 8, .cache_type = REGCACHE_RBTREE, }; /* * Parameters for each imx274 readout mode. * * These are the values to configure the sensor in one of the * implemented modes. * * @init_regs: registers to initialize the mode * @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280) * @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720) * @min_frame_len: Minimum frame length for each mode (see "Frame Rate * Adjustment (CSI-2)" in the datasheet) * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the * datasheet) * @max_fps: Maximum frames per second * @nocpiop: Number of clocks per internal offset period (see "Integration Time * in Each Readout Drive Mode (CSI-2)" in the datasheet) */ struct imx274_mode { const struct reg_8 *init_regs; u8 wbin_ratio; u8 hbin_ratio; int min_frame_len; int min_SHR; int max_fps; int nocpiop; }; /* * imx274 test pattern related structure */ enum { TEST_PATTERN_DISABLED = 0, TEST_PATTERN_ALL_000H, TEST_PATTERN_ALL_FFFH, TEST_PATTERN_ALL_555H, TEST_PATTERN_ALL_AAAH, TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ TEST_PATTERN_H_COLOR_BARS, TEST_PATTERN_V_COLOR_BARS, }; static const char * const tp_qmenu[] = { "Disabled", "All 000h Pattern", "All FFFh Pattern", "All 555h Pattern", "All AAAh Pattern", "Vertical Stripe (555h / AAAh)", "Vertical Stripe (AAAh / 555h)", "Vertical Stripe (000h / 555h)", "Vertical Stripe (555h / 000h)", "Vertical Stripe (000h / FFFh)", "Vertical Stripe (FFFh / 000h)", "Vertical Color Bars", "Horizontal Color Bars", }; /* * All-pixel scan mode (10-bit) * imx274 mode1(refer to datasheet) register configuration with * 3840x2160 resolution, raw10 data and mipi four lane output */ static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { {0x3004, 0x01}, {0x3005, 0x01}, {0x3006, 0x00}, {0x3007, 0xa2}, {0x3018, 0xA2}, /* output XVS, HVS */ {0x306B, 0x05}, {0x30E2, 0x01}, {0x30EE, 0x01}, {0x3342, 0x0A}, {0x3343, 0x00}, {0x3344, 0x16}, {0x3345, 0x00}, {0x33A6, 0x01}, {0x3528, 0x0E}, {0x3554, 0x1F}, {0x3555, 0x01}, {0x3556, 0x01}, {0x3557, 0x01}, {0x3558, 0x01}, {0x3559, 0x00}, {0x355A, 0x00}, {0x35BA, 0x0E}, {0x366A, 0x1B}, {0x366B, 0x1A}, {0x366C, 0x19}, {0x366D, 0x17}, {0x3A41, 0x08}, {IMX274_TABLE_END, 0x00} }; /* * Horizontal/vertical 2/2-line binning * (Horizontal and vertical weightedbinning, 10-bit) * imx274 mode3(refer to datasheet) register configuration with * 1920x1080 resolution, raw10 data and mipi four lane output */ static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { {0x3004, 0x02}, {0x3005, 0x21}, {0x3006, 0x00}, {0x3007, 0xb1}, {0x3018, 0xA2}, /* output XVS, HVS */ {0x306B, 0x05}, {0x30E2, 0x02}, {0x30EE, 0x01}, {0x3342, 0x0A}, {0x3343, 0x00}, {0x3344, 0x1A}, {0x3345, 0x00}, {0x33A6, 0x01}, {0x3528, 0x0E}, {0x3554, 0x00}, {0x3555, 0x01}, {0x3556, 0x01}, {0x3557, 0x01}, {0x3558, 0x01}, {0x3559, 0x00}, {0x355A, 0x00}, {0x35BA, 0x0E}, {0x366A, 0x1B}, {0x366B, 0x1A}, {0x366C, 0x19}, {0x366D, 0x17}, {0x3A41, 0x08}, {IMX274_TABLE_END, 0x00} }; /* * Vertical 2/3 subsampling binning horizontal 3 binning * imx274 mode5(refer to datasheet) register configuration with * 1280x720 resolution, raw10 data and mipi four lane output */ static const struct reg_8 imx274_mode5_1280x720_raw10[] = { {0x3004, 0x03}, {0x3005, 0x31}, {0x3006, 0x00}, {0x3007, 0xa9}, {0x3018, 0xA2}, /* output XVS, HVS */ {0x306B, 0x05}, {0x30E2, 0x03}, {0x30EE, 0x01}, {0x3342, 0x0A}, {0x3343, 0x00}, {0x3344, 0x1B}, {0x3345, 0x00}, {0x33A6, 0x01}, {0x3528, 0x0E}, {0x3554, 0x00}, {0x3555, 0x01}, {0x3556, 0x01}, {0x3557, 0x01}, {0x3558, 0x01}, {0x3559, 0x00}, {0x355A, 0x00}, {0x35BA, 0x0E}, {0x366A, 0x1B}, {0x366B, 0x19}, {0x366C, 0x17}, {0x366D, 0x17}, {0x3A41, 0x04}, {IMX274_TABLE_END, 0x00} }; /* * Vertical 2/8 subsampling horizontal 3 binning * imx274 mode6(refer to datasheet) register configuration with * 1280x540 resolution, raw10 data and mipi four lane output */ static const struct reg_8 imx274_mode6_1280x540_raw10[] = { {0x3004, 0x04}, /* mode setting */ {0x3005, 0x31}, {0x3006, 0x00}, {0x3007, 0x02}, /* mode setting */ {0x3018, 0xA2}, /* output XVS, HVS */ {0x306B, 0x05}, {0x30E2, 0x04}, /* mode setting */ {0x30EE, 0x01}, {0x3342, 0x0A}, {0x3343, 0x00}, {0x3344, 0x16}, {0x3345, 0x00}, {0x33A6, 0x01}, {0x3528, 0x0E}, {0x3554, 0x1F}, {0x3555, 0x01}, {0x3556, 0x01}, {0x3557, 0x01}, {0x3558, 0x01}, {0x3559, 0x00}, {0x355A, 0x00}, {0x35BA, 0x0E}, {0x366A, 0x1B}, {0x366B, 0x1A}, {0x366C, 0x19}, {0x366D, 0x17}, {0x3A41, 0x04}, {IMX274_TABLE_END, 0x00} }; /* * imx274 first step register configuration for * starting stream */ static const struct reg_8 imx274_start_1[] = { {IMX274_STANDBY_REG, 0x12}, /* PLRD: clock settings */ {0x3120, 0xF0}, {0x3121, 0x00}, {0x3122, 0x02}, {0x3129, 0x9C}, {0x312A, 0x02}, {0x312D, 0x02}, {0x310B, 0x00}, /* PLSTMG */ {0x304C, 0x00}, /* PLSTMG01 */ {0x304D, 0x03}, {0x331C, 0x1A}, {0x331D, 0x00}, {0x3502, 0x02}, {0x3529, 0x0E}, {0x352A, 0x0E}, {0x352B, 0x0E}, {0x3538, 0x0E}, {0x3539, 0x0E}, {0x3553, 0x00}, {0x357D, 0x05}, {0x357F, 0x05}, {0x3581, 0x04}, {0x3583, 0x76}, {0x3587, 0x01}, {0x35BB, 0x0E}, {0x35BC, 0x0E}, {0x35BD, 0x0E}, {0x35BE, 0x0E}, {0x35BF, 0x0E}, {0x366E, 0x00}, {0x366F, 0x00}, {0x3670, 0x00}, {0x3671, 0x00}, /* PSMIPI */ {0x3304, 0x32}, /* PSMIPI1 */ {0x3305, 0x00}, {0x3306, 0x32}, {0x3307, 0x00}, {0x3590, 0x32}, {0x3591, 0x00}, {0x3686, 0x32}, {0x3687, 0x00}, {IMX274_TABLE_END, 0x00} }; /* * imx274 second step register configuration for * starting stream */ static const struct reg_8 imx274_start_2[] = { {IMX274_STANDBY_REG, 0x00}, {0x303E, 0x02}, /* SYS_MODE = 2 */ {IMX274_TABLE_END, 0x00} }; /* * imx274 third step register configuration for * starting stream */ static const struct reg_8 imx274_start_3[] = { {0x30F4, 0x00}, {0x3018, 0xA2}, /* XHS VHS OUTPUT */ {IMX274_TABLE_END, 0x00} }; /* * imx274 register configuration for stopping stream */ static const struct reg_8 imx274_stop[] = { {IMX274_STANDBY_REG, 0x01}, {IMX274_TABLE_END, 0x00} }; /* * imx274 disable test pattern register configuration */ static const struct reg_8 imx274_tp_disabled[] = { {0x303C, 0x00}, {0x377F, 0x00}, {0x3781, 0x00}, {0x370B, 0x00}, {IMX274_TABLE_END, 0x00} }; /* * imx274 test pattern register configuration * reg 0x303D defines the test pattern modes */ static const struct reg_8 imx274_tp_regs[] = { {0x303C, 0x11}, {0x370E, 0x01}, {0x377F, 0x01}, {0x3781, 0x01}, {0x370B, 0x11}, {IMX274_TABLE_END, 0x00} }; /* nocpiop happens to be the same number for the implemented modes */ static const struct imx274_mode imx274_modes[] = { { /* mode 1, 4K */ .wbin_ratio = 1, /* 3840 */ .hbin_ratio = 1, /* 2160 */ .init_regs = imx274_mode1_3840x2160_raw10, .min_frame_len = 4550, .min_SHR = 12, .max_fps = 60, .nocpiop = 112, }, { /* mode 3, 1080p */ .wbin_ratio = 2, /* 1920 */ .hbin_ratio = 2, /* 1080 */ .init_regs = imx274_mode3_1920x1080_raw10, .min_frame_len = 2310, .min_SHR = 8, .max_fps = 120, .nocpiop = 112, }, { /* mode 5, 720p */ .wbin_ratio = 3, /* 1280 */ .hbin_ratio = 3, /* 720 */ .init_regs = imx274_mode5_1280x720_raw10, .min_frame_len = 2310, .min_SHR = 8, .max_fps = 120, .nocpiop = 112, }, { /* mode 6, 540p */ .wbin_ratio = 3, /* 1280 */ .hbin_ratio = 4, /* 540 */ .init_regs = imx274_mode6_1280x540_raw10, .min_frame_len = 2310, .min_SHR = 4, .max_fps = 120, .nocpiop = 112, }, }; /* * struct imx274_ctrls - imx274 ctrl structure * @handler: V4L2 ctrl handler structure * @exposure: Pointer to expsure ctrl structure * @gain: Pointer to gain ctrl structure * @vflip: Pointer to vflip ctrl structure * @test_pattern: Pointer to test pattern ctrl structure */ struct imx274_ctrls { struct v4l2_ctrl_handler handler; struct v4l2_ctrl *exposure; struct v4l2_ctrl *gain; struct v4l2_ctrl *vflip; struct v4l2_ctrl *test_pattern; }; /* * struct stim274 - imx274 device structure * @sd: V4L2 subdevice structure * @pad: Media pad structure * @client: Pointer to I2C client * @ctrls: imx274 control structure * @crop: rect to be captured * @compose: compose rect, i.e. output resolution * @format: V4L2 media bus frame format structure * (width and height are in sync with the compose rect) * @frame_rate: V4L2 frame rate structure * @regmap: Pointer to regmap structure * @reset_gpio: Pointer to reset gpio * @supplies: List of analog and digital supply regulators * @inck: Pointer to sensor input clock * @lock: Mutex structure * @mode: Parameters for the selected readout mode */ struct stimx274 { struct v4l2_subdev sd; struct media_pad pad; struct i2c_client *client; struct imx274_ctrls ctrls; struct v4l2_rect crop; struct v4l2_mbus_framefmt format; struct v4l2_fract frame_interval; struct regmap *regmap; struct gpio_desc *reset_gpio; struct regulator_bulk_data supplies[IMX274_NUM_SUPPLIES]; struct clk *inck; struct mutex lock; /* mutex lock for operations */ const struct imx274_mode *mode; }; #define IMX274_ROUND(dim, step, flags) \ ((flags) & V4L2_SEL_FLAG_GE \ ? roundup((dim), (step)) \ : ((flags) & V4L2_SEL_FLAG_LE \ ? rounddown((dim), (step)) \ : rounddown((dim) + (step) / 2, (step)))) /* * Function declaration */ static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); static int imx274_set_exposure(struct stimx274 *priv, int val); static int imx274_set_vflip(struct stimx274 *priv, int val); static int imx274_set_test_pattern(struct stimx274 *priv, int val); static int imx274_set_frame_interval(struct stimx274 *priv, struct v4l2_fract frame_interval); static inline void msleep_range(unsigned int delay_base) { usleep_range(delay_base * 1000, delay_base * 1000 + 500); } /* * v4l2_ctrl and v4l2_subdev related operations */ static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) { return &container_of(ctrl->handler, struct stimx274, ctrls.handler)->sd; } static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) { return container_of(sd, struct stimx274, sd); } /* * Writing a register table * * @priv: Pointer to device * @table: Table containing register values (with optional delays) * * This is used to write register table into sensor's reg map. * * Return: 0 on success, errors otherwise */ static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) { struct regmap *regmap = priv->regmap; int err = 0; const struct reg_8 *next; u8 val; int range_start = -1; int range_count = 0; u8 range_vals[16]; int max_range_vals = ARRAY_SIZE(range_vals); for (next = table;; next++) { if ((next->addr != range_start + range_count) || (next->addr == IMX274_TABLE_END) || (next->addr == IMX274_TABLE_WAIT_MS) || (range_count == max_range_vals)) { if (range_count == 1) err = regmap_write(regmap, range_start, range_vals[0]); else if (range_count > 1) err = regmap_bulk_write(regmap, range_start, &range_vals[0], range_count); else err = 0; if (err) return err; range_start = -1; range_count = 0; /* Handle special address values */ if (next->addr == IMX274_TABLE_END) break; if (next->addr == IMX274_TABLE_WAIT_MS) { msleep_range(next->val); continue; } } val = next->val; if (range_start == -1) range_start = next->addr; range_vals[range_count++] = val; } return 0; } static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) { int err; err = regmap_write(priv->regmap, addr, val); if (err) dev_err(&priv->client->dev, "%s : i2c write failed, %x = %x\n", __func__, addr, val); else dev_dbg(&priv->client->dev, "%s : addr 0x%x, val=0x%x\n", __func__, addr, val); return err; } /** * imx274_read_mbreg - Read a multibyte register. * * Uses a bulk read where possible. * * @priv: Pointer to device structure * @addr: Address of the LSB register. Other registers must be * consecutive, least-to-most significant. * @val: Pointer to store the register value (cpu endianness) * @nbytes: Number of bytes to read (range: [1..3]). * Other bytes are zet to 0. * * Return: 0 on success, errors otherwise */ static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val, size_t nbytes) { __le32 val_le = 0; int err; err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes); if (err) { dev_err(&priv->client->dev, "%s : i2c bulk read failed, %x (%zu bytes)\n", __func__, addr, nbytes); } else { *val = le32_to_cpu(val_le); dev_dbg(&priv->client->dev, "%s : addr 0x%x, val=0x%x (%zu bytes)\n", __func__, addr, *val, nbytes); } return err; } /** * imx274_write_mbreg - Write a multibyte register. * * Uses a bulk write where possible. * * @priv: Pointer to device structure * @addr: Address of the LSB register. Other registers must be * consecutive, least-to-most significant. * @val: Value to be written to the register (cpu endianness) * @nbytes: Number of bytes to write (range: [1..3]) */ static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val, size_t nbytes) { __le32 val_le = cpu_to_le32(val); int err; err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes); if (err) dev_err(&priv->client->dev, "%s : i2c bulk write failed, %x = %x (%zu bytes)\n", __func__, addr, val, nbytes); else dev_dbg(&priv->client->dev, "%s : addr 0x%x, val=0x%x (%zu bytes)\n", __func__, addr, val, nbytes); return err; } /* * Set mode registers to start stream. * @priv: Pointer to device structure * * Return: 0 on success, errors otherwise */ static int imx274_mode_regs(struct stimx274 *priv) { int err = 0; err = imx274_write_table(priv, imx274_start_1); if (err) return err; err = imx274_write_table(priv, priv->mode->init_regs); return err; } /* * imx274_start_stream - Function for starting stream per mode index * @priv: Pointer to device structure * * Return: 0 on success, errors otherwise */ static int imx274_start_stream(struct stimx274 *priv) { int err = 0; err = __v4l2_ctrl_handler_setup(&priv->ctrls.handler); if (err) { dev_err(&priv->client->dev, "Error %d setup controls\n", err); return err; } /* * Refer to "Standby Cancel Sequence when using CSI-2" in * imx274 datasheet, it should wait 10ms or more here. * give it 1 extra ms for margin */ msleep_range(11); err = imx274_write_table(priv, imx274_start_2); if (err) return err; /* * Refer to "Standby Cancel Sequence when using CSI-2" in * imx274 datasheet, it should wait 7ms or more here. * give it 1 extra ms for margin */ msleep_range(8); err = imx274_write_table(priv, imx274_start_3); if (err) return err; return 0; } /* * imx274_reset - Function called to reset the sensor * @priv: Pointer to device structure * @rst: Input value for determining the sensor's end state after reset * * Set the senor in reset and then * if rst = 0, keep it in reset; * if rst = 1, bring it out of reset. * */ static void imx274_reset(struct stimx274 *priv, int rst) { gpiod_set_value_cansleep(priv->reset_gpio, 0); usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); gpiod_set_value_cansleep(priv->reset_gpio, !!rst); usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); } static int imx274_power_on(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct stimx274 *imx274 = to_imx274(sd); int ret; /* keep sensor in reset before power on */ imx274_reset(imx274, 0); ret = clk_prepare_enable(imx274->inck); if (ret) { dev_err(&imx274->client->dev, "Failed to enable input clock: %d\n", ret); return ret; } ret = regulator_bulk_enable(IMX274_NUM_SUPPLIES, imx274->supplies); if (ret) { dev_err(&imx274->client->dev, "Failed to enable regulators: %d\n", ret); goto fail_reg; } udelay(2); imx274_reset(imx274, 1); return 0; fail_reg: clk_disable_unprepare(imx274->inck); return ret; } static int imx274_power_off(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct stimx274 *imx274 = to_imx274(sd); imx274_reset(imx274, 0); regulator_bulk_disable(IMX274_NUM_SUPPLIES, imx274->supplies); clk_disable_unprepare(imx274->inck); return 0; } static int imx274_regulators_get(struct device *dev, struct stimx274 *imx274) { unsigned int i; for (i = 0; i < IMX274_NUM_SUPPLIES; i++) imx274->supplies[i].supply = imx274_supply_names[i]; return devm_regulator_bulk_get(dev, IMX274_NUM_SUPPLIES, imx274->supplies); } /** * imx274_s_ctrl - This is used to set the imx274 V4L2 controls * @ctrl: V4L2 control to be set * * This function is used to set the V4L2 controls for the imx274 sensor. * * Return: 0 on success, errors otherwise */ static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) { struct v4l2_subdev *sd = ctrl_to_sd(ctrl); struct stimx274 *imx274 = to_imx274(sd); int ret = -EINVAL; if (!pm_runtime_get_if_in_use(&imx274->client->dev)) return 0; dev_dbg(&imx274->client->dev, "%s : s_ctrl: %s, value: %d\n", __func__, ctrl->name, ctrl->val); switch (ctrl->id) { case V4L2_CID_EXPOSURE: dev_dbg(&imx274->client->dev, "%s : set V4L2_CID_EXPOSURE\n", __func__); ret = imx274_set_exposure(imx274, ctrl->val); break; case V4L2_CID_GAIN: dev_dbg(&imx274->client->dev, "%s : set V4L2_CID_GAIN\n", __func__); ret = imx274_set_gain(imx274, ctrl); break; case V4L2_CID_VFLIP: dev_dbg(&imx274->client->dev, "%s : set V4L2_CID_VFLIP\n", __func__); ret = imx274_set_vflip(imx274, ctrl->val); break; case V4L2_CID_TEST_PATTERN: dev_dbg(&imx274->client->dev, "%s : set V4L2_CID_TEST_PATTERN\n", __func__); ret = imx274_set_test_pattern(imx274, ctrl->val); break; } pm_runtime_put(&imx274->client->dev); return ret; } static int imx274_binning_goodness(struct stimx274 *imx274, int w, int ask_w, int h, int ask_h, u32 flags) { struct device *dev = &imx274->client->dev; const int goodness = 100000; int val = 0; if (flags & V4L2_SEL_FLAG_GE) { if (w < ask_w) val -= goodness; if (h < ask_h) val -= goodness; } if (flags & V4L2_SEL_FLAG_LE) { if (w > ask_w) val -= goodness; if (h > ask_h) val -= goodness; } val -= abs(w - ask_w); val -= abs(h - ask_h); dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n", __func__, ask_w, ask_h, w, h, val); return val; } /** * __imx274_change_compose - Helper function to change binning and set both * compose and format. * * We have two entry points to change binning: set_fmt and * set_selection(COMPOSE). Both have to compute the new output size * and set it in both the compose rect and the frame format size. We * also need to do the same things after setting cropping to restore * 1:1 binning. * * This function contains the common code for these three cases, it * has many arguments in order to accommodate the needs of all of * them. * * Must be called with imx274->lock locked. * * @imx274: The device object * @sd_state: The subdev state we are editing for TRY requests * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller * @width: Input-output parameter: set to the desired width before * the call, contains the chosen value after returning successfully * @height: Input-output parameter for height (see @width) * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not * available (when called from set_fmt) */ static int __imx274_change_compose(struct stimx274 *imx274, struct v4l2_subdev_state *sd_state, u32 which, u32 *width, u32 *height, u32 flags) { struct device *dev = &imx274->client->dev; const struct v4l2_rect *cur_crop; struct v4l2_mbus_framefmt *tgt_fmt; unsigned int i; const struct imx274_mode *best_mode = &imx274_modes[0]; int best_goodness = INT_MIN; if (which == V4L2_SUBDEV_FORMAT_TRY) { cur_crop = &sd_state->pads->try_crop; tgt_fmt = &sd_state->pads->try_fmt; } else { cur_crop = &imx274->crop; tgt_fmt = &imx274->format; } for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) { u8 wratio = imx274_modes[i].wbin_ratio; u8 hratio = imx274_modes[i].hbin_ratio; int goodness = imx274_binning_goodness( imx274, cur_crop->width / wratio, *width, cur_crop->height / hratio, *height, flags); if (goodness >= best_goodness) { best_goodness = goodness; best_mode = &imx274_modes[i]; } } *width = cur_crop->width / best_mode->wbin_ratio; *height = cur_crop->height / best_mode->hbin_ratio; if (which == V4L2_SUBDEV_FORMAT_ACTIVE) imx274->mode = best_mode; dev_dbg(dev, "%s: selected %ux%u binning\n", __func__, best_mode->wbin_ratio, best_mode->hbin_ratio); tgt_fmt->width = *width; tgt_fmt->height = *height; tgt_fmt->field = V4L2_FIELD_NONE; return 0; } /** * imx274_get_fmt - Get the pad format * @sd: Pointer to V4L2 Sub device structure * @sd_state: Pointer to sub device state structure * @fmt: Pointer to pad level media bus format * * This function is used to get the pad format information. * * Return: 0 on success */ static int imx274_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct stimx274 *imx274 = to_imx274(sd); mutex_lock(&imx274->lock); fmt->format = imx274->format; mutex_unlock(&imx274->lock); return 0; } /** * imx274_set_fmt - This is used to set the pad format * @sd: Pointer to V4L2 Sub device structure * @sd_state: Pointer to sub device state information structure * @format: Pointer to pad level media bus format * * This function is used to set the pad format. * * Return: 0 on success */ static int imx274_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *fmt = &format->format; struct stimx274 *imx274 = to_imx274(sd); int err = 0; mutex_lock(&imx274->lock); err = __imx274_change_compose(imx274, sd_state, format->which, &fmt->width, &fmt->height, 0); if (err) goto out; /* * __imx274_change_compose already set width and height in the * applicable format, but we need to keep all other format * values, so do a full copy here */ fmt->field = V4L2_FIELD_NONE; if (format->which == V4L2_SUBDEV_FORMAT_TRY) sd_state->pads->try_fmt = *fmt; else imx274->format = *fmt; out: mutex_unlock(&imx274->lock); return err; } static int imx274_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_selection *sel) { struct stimx274 *imx274 = to_imx274(sd); const struct v4l2_rect *src_crop; const struct v4l2_mbus_framefmt *src_fmt; int ret = 0; if (sel->pad != 0) return -EINVAL; if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) { sel->r.left = 0; sel->r.top = 0; sel->r.width = IMX274_MAX_WIDTH; sel->r.height = IMX274_MAX_HEIGHT; return 0; } if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { src_crop = &sd_state->pads->try_crop; src_fmt = &sd_state->pads->try_fmt; } else { src_crop = &imx274->crop; src_fmt = &imx274->format; } mutex_lock(&imx274->lock); switch (sel->target) { case V4L2_SEL_TGT_CROP: sel->r = *src_crop; break; case V4L2_SEL_TGT_COMPOSE_BOUNDS: sel->r.top = 0; sel->r.left = 0; sel->r.width = src_crop->width; sel->r.height = src_crop->height; break; case V4L2_SEL_TGT_COMPOSE: sel->r.top = 0; sel->r.left = 0; sel->r.width = src_fmt->width; sel->r.height = src_fmt->height; break; default: ret = -EINVAL; } mutex_unlock(&imx274->lock); return ret; } static int imx274_set_selection_crop(struct stimx274 *imx274, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_selection *sel) { struct v4l2_rect *tgt_crop; struct v4l2_rect new_crop; bool size_changed; /* * h_step could be 12 or 24 depending on the binning. But we * won't know the binning until we choose the mode later in * __imx274_change_compose(). Thus let's be safe and use the * most conservative value in all cases. */ const u32 h_step = 24; new_crop.width = min_t(u32, IMX274_ROUND(sel->r.width, h_step, sel->flags), IMX274_MAX_WIDTH); /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ if (new_crop.width < 144) new_crop.width = 144; new_crop.left = min_t(u32, IMX274_ROUND(sel->r.left, h_step, 0), IMX274_MAX_WIDTH - new_crop.width); new_crop.height = min_t(u32, IMX274_ROUND(sel->r.height, 2, sel->flags), IMX274_MAX_HEIGHT); new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0), IMX274_MAX_HEIGHT - new_crop.height); sel->r = new_crop; if (sel->which == V4L2_SUBDEV_FORMAT_TRY) tgt_crop = &sd_state->pads->try_crop; else tgt_crop = &imx274->crop; mutex_lock(&imx274->lock); size_changed = (new_crop.width != tgt_crop->width || new_crop.height != tgt_crop->height); /* __imx274_change_compose needs the new size in *tgt_crop */ *tgt_crop = new_crop; /* if crop size changed then reset the output image size */ if (size_changed) __imx274_change_compose(imx274, sd_state, sel->which, &new_crop.width, &new_crop.height, sel->flags); mutex_unlock(&imx274->lock); return 0; } static int imx274_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_selection *sel) { struct stimx274 *imx274 = to_imx274(sd); if (sel->pad != 0) return -EINVAL; if (sel->target == V4L2_SEL_TGT_CROP) return imx274_set_selection_crop(imx274, sd_state, sel); if (sel->target == V4L2_SEL_TGT_COMPOSE) { int err; mutex_lock(&imx274->lock); err = __imx274_change_compose(imx274, sd_state, sel->which, &sel->r.width, &sel->r.height, sel->flags); mutex_unlock(&imx274->lock); /* * __imx274_change_compose already set width and * height in set->r, we still need to set top-left */ if (!err) { sel->r.top = 0; sel->r.left = 0; } return err; } return -EINVAL; } static int imx274_apply_trimming(struct stimx274 *imx274) { u32 h_start; u32 h_end; u32 hmax; u32 v_cut; s32 v_pos; u32 write_v_size; u32 y_out_size; int err; h_start = imx274->crop.left + 12; h_end = h_start + imx274->crop.width; /* Use the minimum allowed value of HMAX */ /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */ /* Note: 260 is the minimum HMAX in all implemented modes */ hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23); /* invert v_pos if VFLIP */ v_pos = imx274->ctrls.vflip->cur.val ? (-imx274->crop.top / 2) : (imx274->crop.top / 2); v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2; write_v_size = imx274->crop.height + 22; y_out_size = imx274->crop.height; err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2); if (!err) err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1); if (!err) err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB, h_start, 2); if (!err) err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB, h_end, 2); if (!err) err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1); if (!err) err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB, v_cut, 2); if (!err) err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB, v_pos, 2); if (!err) err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB, write_v_size, 2); if (!err) err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB, y_out_size, 2); return err; } /** * imx274_g_frame_interval - Get the frame interval * @sd: Pointer to V4L2 Sub device structure * @fi: Pointer to V4l2 Sub device frame interval structure * * This function is used to get the frame interval. * * Return: 0 on success */ static int imx274_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { struct stimx274 *imx274 = to_imx274(sd); fi->interval = imx274->frame_interval; dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", __func__, imx274->frame_interval.numerator, imx274->frame_interval.denominator); return 0; } /** * imx274_s_frame_interval - Set the frame interval * @sd: Pointer to V4L2 Sub device structure * @fi: Pointer to V4l2 Sub device frame interval structure * * This function is used to set the frame intervavl. * * Return: 0 on success */ static int imx274_s_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { struct stimx274 *imx274 = to_imx274(sd); struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; int min, max, def; int ret; ret = pm_runtime_resume_and_get(&imx274->client->dev); if (ret < 0) return ret; mutex_lock(&imx274->lock); ret = imx274_set_frame_interval(imx274, fi->interval); if (!ret) { fi->interval = imx274->frame_interval; /* * exposure time range is decided by frame interval * need to update it after frame interval changes */ min = IMX274_MIN_EXPOSURE_TIME; max = fi->interval.numerator * 1000000 / fi->interval.denominator; def = max; ret = __v4l2_ctrl_modify_range(ctrl, min, max, 1, def); if (ret) { dev_err(&imx274->client->dev, "Exposure ctrl range update failed\n"); goto unlock; } /* update exposure time accordingly */ imx274_set_exposure(imx274, ctrl->val); dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", fi->interval.numerator * 1000000 / fi->interval.denominator); } unlock: mutex_unlock(&imx274->lock); pm_runtime_put(&imx274->client->dev); return ret; } /** * imx274_load_default - load default control values * @priv: Pointer to device structure * * Return: 0 on success, errors otherwise */ static void imx274_load_default(struct stimx274 *priv) { /* load default control values */ priv->frame_interval.numerator = 1; priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; priv->ctrls.gain->val = IMX274_DEF_GAIN; priv->ctrls.vflip->val = 0; priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; } /** * imx274_s_stream - It is used to start/stop the streaming. * @sd: V4L2 Sub device * @on: Flag (True / False) * * This function controls the start or stop of streaming for the * imx274 sensor. * * Return: 0 on success, errors otherwise */ static int imx274_s_stream(struct v4l2_subdev *sd, int on) { struct stimx274 *imx274 = to_imx274(sd); int ret = 0; dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__, on ? "Stream Start" : "Stream Stop", imx274->mode - &imx274_modes[0]); mutex_lock(&imx274->lock); if (on) { ret = pm_runtime_resume_and_get(&imx274->client->dev); if (ret < 0) { mutex_unlock(&imx274->lock); return ret; } /* load mode registers */ ret = imx274_mode_regs(imx274); if (ret) goto fail; ret = imx274_apply_trimming(imx274); if (ret) goto fail; /* * update frame rate & exposure. if the last mode is different, * HMAX could be changed. As the result, frame rate & exposure * are changed. * gain is not affected. */ ret = imx274_set_frame_interval(imx274, imx274->frame_interval); if (ret) goto fail; /* start stream */ ret = imx274_start_stream(imx274); if (ret) goto fail; } else { /* stop stream */ ret = imx274_write_table(imx274, imx274_stop); if (ret) goto fail; pm_runtime_put(&imx274->client->dev); } mutex_unlock(&imx274->lock); dev_dbg(&imx274->client->dev, "%s : Done\n", __func__); return 0; fail: pm_runtime_put(&imx274->client->dev); mutex_unlock(&imx274->lock); dev_err(&imx274->client->dev, "s_stream failed\n"); return ret; } /* * imx274_get_frame_length - Function for obtaining current frame length * @priv: Pointer to device structure * @val: Pointer to obtained value * * frame_length = vmax x (svr + 1), in unit of hmax. * * Return: 0 on success */ static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) { int err; u32 svr; u32 vmax; err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); if (err) goto fail; err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3); if (err) goto fail; *val = vmax * (svr + 1); return 0; fail: dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, u32 *frame_length) { int err; err = imx274_get_frame_length(priv, frame_length); if (err) return err; if (*frame_length < priv->mode->min_frame_len) *frame_length = priv->mode->min_frame_len; *val = *frame_length - *val; /* convert to raw shr */ if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) *val = *frame_length - IMX274_SHR_LIMIT_CONST; else if (*val < priv->mode->min_SHR) *val = priv->mode->min_SHR; return 0; } /* * imx274_set_digital gain - Function called when setting digital gain * @priv: Pointer to device structure * @dgain: Value of digital gain. * * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x * * Return: 0 on success */ static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) { u8 reg_val; reg_val = ffs(dgain); if (reg_val) reg_val--; reg_val = clamp(reg_val, (u8)0, (u8)3); return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, reg_val & IMX274_MASK_LSB_4_BITS); } /* * imx274_set_gain - Function called when setting gain * @priv: Pointer to device structure * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; * @ctrl: v4l2 control pointer * * Set the gain based on input value. * The caller should hold the mutex lock imx274->lock if necessary * * Return: 0 on success */ static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) { int err; u32 gain, analog_gain, digital_gain, gain_reg; gain = (u32)(ctrl->val); dev_dbg(&priv->client->dev, "%s : input gain = %d.%d\n", __func__, gain >> IMX274_GAIN_SHIFT, ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN; else if (gain < IMX274_MIN_GAIN) gain = IMX274_MIN_GAIN; if (gain <= IMX274_MAX_ANALOG_GAIN) digital_gain = 1; else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) digital_gain = 2; else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) digital_gain = 4; else digital_gain = IMX274_MAX_DIGITAL_GAIN; analog_gain = gain / digital_gain; dev_dbg(&priv->client->dev, "%s : digital gain = %d, analog gain = %d.%d\n", __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); err = imx274_set_digital_gain(priv, digital_gain); if (err) goto fail; /* convert to register value, refer to imx274 datasheet */ gain_reg = (u32)IMX274_GAIN_CONST - (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; if (gain_reg > IMX274_GAIN_REG_MAX) gain_reg = IMX274_GAIN_REG_MAX; err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg, 2); if (err) goto fail; if (IMX274_GAIN_CONST - gain_reg == 0) { err = -EINVAL; goto fail; } /* convert register value back to gain value */ ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / (IMX274_GAIN_CONST - gain_reg) * digital_gain; dev_dbg(&priv->client->dev, "%s : GAIN control success, gain_reg = %d, new gain = %d\n", __func__, gain_reg, ctrl->val); return 0; fail: dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } /* * imx274_set_coarse_time - Function called when setting SHR value * @priv: Pointer to device structure * @val: Value for exposure time in number of line_length, or [HMAX] * * Set SHR value based on input value. * * Return: 0 on success */ static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) { int err; u32 coarse_time, frame_length; coarse_time = *val; /* convert exposure_time to appropriate SHR value */ err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); if (err) goto fail; err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2); if (err) goto fail; *val = frame_length - coarse_time; return 0; fail: dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } /* * imx274_set_exposure - Function called when setting exposure time * @priv: Pointer to device structure * @val: Variable for exposure time, in the unit of micro-second * * Set exposure time based on input value. * The caller should hold the mutex lock imx274->lock if necessary * * Return: 0 on success */ static int imx274_set_exposure(struct stimx274 *priv, int val) { int err; u32 hmax; u32 coarse_time; /* exposure time in unit of line (HMAX)*/ dev_dbg(&priv->client->dev, "%s : EXPOSURE control input = %d\n", __func__, val); /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); if (err) goto fail; if (hmax == 0) { err = -EINVAL; goto fail; } coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val - priv->mode->nocpiop) / hmax; /* step 2: convert exposure_time into SHR value */ /* set SHR */ err = imx274_set_coarse_time(priv, &coarse_time); if (err) goto fail; priv->ctrls.exposure->val = (coarse_time * hmax + priv->mode->nocpiop) / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2); dev_dbg(&priv->client->dev, "%s : EXPOSURE control success\n", __func__); return 0; fail: dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } /* * imx274_set_vflip - Function called when setting vertical flip * @priv: Pointer to device structure * @val: Value for vflip setting * * Set vertical flip based on input value. * val = 0: normal, no vertical flip * val = 1: vertical flip enabled * The caller should hold the mutex lock imx274->lock if necessary * * Return: 0 on success */ static int imx274_set_vflip(struct stimx274 *priv, int val) { int err; err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); if (err) { dev_err(&priv->client->dev, "VFLIP control error\n"); return err; } dev_dbg(&priv->client->dev, "%s : VFLIP control success\n", __func__); return 0; } /* * imx274_set_test_pattern - Function called when setting test pattern * @priv: Pointer to device structure * @val: Variable for test pattern * * Set to different test patterns based on input value. * * Return: 0 on success */ static int imx274_set_test_pattern(struct stimx274 *priv, int val) { int err = 0; if (val == TEST_PATTERN_DISABLED) { err = imx274_write_table(priv, imx274_tp_disabled); } else if (val <= TEST_PATTERN_V_COLOR_BARS) { err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1); if (!err) err = imx274_write_table(priv, imx274_tp_regs); } else { err = -EINVAL; } if (!err) dev_dbg(&priv->client->dev, "%s : TEST PATTERN control success\n", __func__); else dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } /* * imx274_set_frame_length - Function called when setting frame length * @priv: Pointer to device structure * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) * * Set frame length based on input value. * * Return: 0 on success */ static int imx274_set_frame_length(struct stimx274 *priv, u32 val) { int err; u32 frame_length; dev_dbg(&priv->client->dev, "%s : input length = %d\n", __func__, val); frame_length = (u32)val; err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3); if (err) goto fail; return 0; fail: dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } /* * imx274_set_frame_interval - Function called when setting frame interval * @priv: Pointer to device structure * @frame_interval: Variable for frame interval * * Change frame interval by updating VMAX value * The caller should hold the mutex lock imx274->lock if necessary * * Return: 0 on success */ static int imx274_set_frame_interval(struct stimx274 *priv, struct v4l2_fract frame_interval) { int err; u32 frame_length, req_frame_rate; u32 svr; u32 hmax; dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", __func__, frame_interval.numerator, frame_interval.denominator); if (frame_interval.numerator == 0 || frame_interval.denominator == 0) { frame_interval.denominator = IMX274_DEF_FRAME_RATE; frame_interval.numerator = 1; } req_frame_rate = (u32)(frame_interval.denominator / frame_interval.numerator); /* boundary check */ if (req_frame_rate > priv->mode->max_fps) { frame_interval.numerator = 1; frame_interval.denominator = priv->mode->max_fps; } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { frame_interval.numerator = 1; frame_interval.denominator = IMX274_MIN_FRAME_RATE; } /* * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX */ err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); if (err) goto fail; dev_dbg(&priv->client->dev, "%s : register SVR = %d\n", __func__, svr); err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); if (err) goto fail; dev_dbg(&priv->client->dev, "%s : register HMAX = %d\n", __func__, hmax); if (hmax == 0 || frame_interval.denominator == 0) { err = -EINVAL; goto fail; } frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax * frame_interval.numerator / frame_interval.denominator; err = imx274_set_frame_length(priv, frame_length); if (err) goto fail; priv->frame_interval = frame_interval; return 0; fail: dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); return err; } static int imx274_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { if (code->index > 0) return -EINVAL; /* only supported format in the driver is Raw 10 bits SRGGB */ code->code = MEDIA_BUS_FMT_SRGGB10_1X10; return 0; } static const struct v4l2_subdev_pad_ops imx274_pad_ops = { .enum_mbus_code = imx274_enum_mbus_code, .get_fmt = imx274_get_fmt, .set_fmt = imx274_set_fmt, .get_selection = imx274_get_selection, .set_selection = imx274_set_selection, }; static const struct v4l2_subdev_video_ops imx274_video_ops = { .g_frame_interval = imx274_g_frame_interval, .s_frame_interval = imx274_s_frame_interval, .s_stream = imx274_s_stream, }; static const struct v4l2_subdev_ops imx274_subdev_ops = { .pad = &imx274_pad_ops, .video = &imx274_video_ops, }; static const struct v4l2_ctrl_ops imx274_ctrl_ops = { .s_ctrl = imx274_s_ctrl, }; static const struct of_device_id imx274_of_id_table[] = { { .compatible = "sony,imx274" }, { } }; MODULE_DEVICE_TABLE(of, imx274_of_id_table); static const struct i2c_device_id imx274_id[] = { { "IMX274", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, imx274_id); static int imx274_fwnode_parse(struct device *dev) { struct fwnode_handle *endpoint; /* Only CSI2 is supported */ struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY }; int ret; endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); if (!endpoint) { dev_err(dev, "Endpoint node not found\n"); return -EINVAL; } ret = v4l2_fwnode_endpoint_parse(endpoint, &ep); fwnode_handle_put(endpoint); if (ret == -ENXIO) { dev_err(dev, "Unsupported bus type, should be CSI2\n"); return ret; } else if (ret) { dev_err(dev, "Parsing endpoint node failed %d\n", ret); return ret; } /* Check number of data lanes, only 4 lanes supported */ if (ep.bus.mipi_csi2.num_data_lanes != 4) { dev_err(dev, "Invalid data lanes: %d\n", ep.bus.mipi_csi2.num_data_lanes); return -EINVAL; } return 0; } static int imx274_probe(struct i2c_client *client) { struct v4l2_subdev *sd; struct stimx274 *imx274; struct device *dev = &client->dev; int ret; /* initialize imx274 */ imx274 = devm_kzalloc(dev, sizeof(*imx274), GFP_KERNEL); if (!imx274) return -ENOMEM; mutex_init(&imx274->lock); ret = imx274_fwnode_parse(dev); if (ret) return ret; imx274->inck = devm_clk_get_optional(dev, "inck"); if (IS_ERR(imx274->inck)) return PTR_ERR(imx274->inck); ret = imx274_regulators_get(dev, imx274); if (ret) { dev_err(dev, "Failed to get power regulators, err: %d\n", ret); return ret; } /* initialize format */ imx274->mode = &imx274_modes[0]; imx274->crop.width = IMX274_MAX_WIDTH; imx274->crop.height = IMX274_MAX_HEIGHT; imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio; imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio; imx274->format.field = V4L2_FIELD_NONE; imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; imx274->format.colorspace = V4L2_COLORSPACE_SRGB; imx274->frame_interval.numerator = 1; imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; /* initialize regmap */ imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); if (IS_ERR(imx274->regmap)) { dev_err(dev, "regmap init failed: %ld\n", PTR_ERR(imx274->regmap)); ret = -ENODEV; goto err_regmap; } /* initialize subdevice */ imx274->client = client; sd = &imx274->sd; v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; /* initialize subdev media pad */ imx274->pad.flags = MEDIA_PAD_FL_SOURCE; sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); if (ret < 0) { dev_err(dev, "%s : media entity init Failed %d\n", __func__, ret); goto err_regmap; } /* initialize sensor reset gpio */ imx274->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(imx274->reset_gpio)) { if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER) dev_err(dev, "Reset GPIO not setup in DT"); ret = PTR_ERR(imx274->reset_gpio); goto err_me; } /* power on the sensor */ ret = imx274_power_on(dev); if (ret < 0) { dev_err(dev, "%s : imx274 power on failed\n", __func__); goto err_me; } /* initialize controls */ ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4); if (ret < 0) { dev_err(dev, "%s : ctrl handler init Failed\n", __func__); goto err_power_off; } imx274->ctrls.handler.lock = &imx274->lock; /* add new controls */ imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( &imx274->ctrls.handler, &imx274_ctrl_ops, V4L2_CID_TEST_PATTERN, ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); imx274->ctrls.gain = v4l2_ctrl_new_std( &imx274->ctrls.handler, &imx274_ctrl_ops, V4L2_CID_GAIN, IMX274_MIN_GAIN, IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1, IMX274_DEF_GAIN); imx274->ctrls.exposure = v4l2_ctrl_new_std( &imx274->ctrls.handler, &imx274_ctrl_ops, V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, 1000000 / IMX274_DEF_FRAME_RATE, 1, IMX274_MIN_EXPOSURE_TIME); imx274->ctrls.vflip = v4l2_ctrl_new_std( &imx274->ctrls.handler, &imx274_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); imx274->sd.ctrl_handler = &imx274->ctrls.handler; if (imx274->ctrls.handler.error) { ret = imx274->ctrls.handler.error; goto err_ctrls; } /* load default control values */ imx274_load_default(imx274); /* register subdevice */ ret = v4l2_async_register_subdev(sd); if (ret < 0) { dev_err(dev, "%s : v4l2_async_register_subdev failed %d\n", __func__, ret); goto err_ctrls; } pm_runtime_set_active(dev); pm_runtime_enable(dev); pm_runtime_idle(dev); dev_info(dev, "imx274 : imx274 probe success !\n"); return 0; err_ctrls: v4l2_ctrl_handler_free(&imx274->ctrls.handler); err_power_off: imx274_power_off(dev); err_me: media_entity_cleanup(&sd->entity); err_regmap: mutex_destroy(&imx274->lock); return ret; } static int imx274_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct stimx274 *imx274 = to_imx274(sd); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) imx274_power_off(&client->dev); pm_runtime_set_suspended(&client->dev); v4l2_async_unregister_subdev(sd); v4l2_ctrl_handler_free(&imx274->ctrls.handler); media_entity_cleanup(&sd->entity); mutex_destroy(&imx274->lock); return 0; } static const struct dev_pm_ops imx274_pm_ops = { SET_RUNTIME_PM_OPS(imx274_power_off, imx274_power_on, NULL) }; static struct i2c_driver imx274_i2c_driver = { .driver = { .name = DRIVER_NAME, .pm = &imx274_pm_ops, .of_match_table = imx274_of_id_table, }, .probe_new = imx274_probe, .remove = imx274_remove, .id_table = imx274_id, }; module_i2c_driver(imx274_i2c_driver); MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>"); MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); MODULE_LICENSE("GPL v2");
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