From 6390e65023f728f3ba3a85d4a6e7ed883bf8e7e8 Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Fri, 25 Feb 2022 18:16:13 +0000 Subject: [PATCH] media/i2c: Add driver for Omnivision OV2311 Omnivision OV2311 is a CSI2 1600x1300 global shutter image sensor. Add a driver for it. Signed-off-by: Dave Stevenson --- drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov2311.c | 1179 ++++++++++++++++++++++++++++++++++++ 3 files changed, 1191 insertions(+) create mode 100644 drivers/media/i2c/ov2311.c --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -395,6 +395,17 @@ config VIDEO_OV13B10 This is a Video4Linux2 sensor driver for the OmniVision OV13B10 camera. +config VIDEO_OV2311 + tristate "OmniVision OV2311 sensor support" + depends on I2C && VIDEO_DEV + depends on MEDIA_CAMERA_SUPPORT + help + This is a Video4Linux2 sensor-level driver for the OmniVision + OV2311 camera. + + To compile this driver as a module, choose M here: the + module will be called ov2311. + config VIDEO_OV2640 tristate "OmniVision OV2640 sensor support" depends on VIDEO_DEV && I2C --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -77,6 +77,7 @@ obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o obj-$(CONFIG_VIDEO_OV08D10) += ov08d10.o obj-$(CONFIG_VIDEO_OV13858) += ov13858.o obj-$(CONFIG_VIDEO_OV13B10) += ov13b10.o +obj-$(CONFIG_VIDEO_OV2311) += ov2311.o obj-$(CONFIG_VIDEO_OV2640) += ov2640.o obj-$(CONFIG_VIDEO_OV2659) += ov2659.o obj-$(CONFIG_VIDEO_OV2680) += ov2680.o --- /dev/null +++ b/drivers/media/i2c/ov2311.c @@ -0,0 +1,1179 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Omnivision OV2311 1600x1300 global shutter image sensor driver + * Copyright (C) 2022, Raspberry Pi (Trading) Ltd + * + * This driver is based on the OV9281 driver. + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd. + * Register configuration from + * https://github.com/ArduCAM/ArduCAM_USB_Camera_Shield/tree/master/Config/USB3.0_UC-425_Rev.C%2BUC-628_Rev.B/OV2311 + * with additional exposure and gain register information from + * https://github.com/renesas-rcar/linux-bsp/tree/0cf6e36f5bf49e1c2aab87139ec5b588623c56f8/drivers/media/i2c/imagers + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define OV2311_LINK_FREQ 400000000 +#define OV2311_LANES 2 + +/* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */ +#define OV2311_PIXEL_RATE_10BIT (OV2311_LINK_FREQ * 2 * \ + OV2311_LANES / 10) +#define OV2311_PIXEL_RATE_8BIT (OV2311_LINK_FREQ * 2 * \ + OV2311_LANES / 8) +#define OV2311_XVCLK_FREQ 24000000 + +#define CHIP_ID 0x2311 +#define OV2311_REG_CHIP_ID 0x300a + +#define OV2311_REG_CTRL_MODE 0x0100 +#define OV2311_MODE_SW_STANDBY 0x0 +#define OV2311_MODE_STREAMING BIT(0) + +#define OV2311_REG_V_FLIP 0x3820 +#define OV2311_REG_H_FLIP 0x3821 +#define OV2311_FLIP_BIT BIT(2) + +#define OV2311_REG_EXPOSURE 0x3501 +#define OV2311_EXPOSURE_MIN 4 +#define OV2311_EXPOSURE_STEP 1 +#define OV2311_VTS_MAX 0xffff + +#define OV2311_REG_GAIN_H 0x3508 +#define OV2311_REG_GAIN_L 0x3509 +#define OV2311_GAIN_H_MASK 0x07 +#define OV2311_GAIN_H_SHIFT 8 +#define OV2311_GAIN_L_MASK 0xff +#define OV2311_GAIN_MIN 0x100 +#define OV2311_GAIN_MAX 0x780 +#define OV2311_GAIN_STEP 1 +#define OV2311_GAIN_DEFAULT OV2311_GAIN_MIN + +#define OV2311_REG_TEST_PATTERN 0x5e00 +#define OV2311_TEST_PATTERN_ENABLE 0x80 +#define OV2311_TEST_PATTERN_DISABLE 0x0 + +#define OV2311_REG_VTS 0x380e + +/* + * OV2311 native and active pixel array size. + * Datasheet not available to confirm these values. renesas-rcar linux-bsp tree + * has these values. + */ +#define OV2311_NATIVE_WIDTH 1616U +#define OV2311_NATIVE_HEIGHT 1316U +#define OV2311_PIXEL_ARRAY_LEFT 8U +#define OV2311_PIXEL_ARRAY_TOP 8U +#define OV2311_PIXEL_ARRAY_WIDTH 1600U +#define OV2311_PIXEL_ARRAY_HEIGHT 1300U + +#define REG_NULL 0xFFFF + +#define OV2311_REG_VALUE_08BIT 1 +#define OV2311_REG_VALUE_16BIT 2 +#define OV2311_REG_VALUE_24BIT 3 + +#define OV2311_NAME "ov2311" + +static const char * const ov2311_supply_names[] = { + "avdd", /* Analog power */ + "dovdd", /* Digital I/O power */ + "dvdd", /* Digital core power */ +}; + +#define OV2311_NUM_SUPPLIES ARRAY_SIZE(ov2311_supply_names) + +struct regval { + u16 addr; + u8 val; +}; + +struct ov2311_mode { + u32 width; + u32 height; + u32 hts_def; + u32 vts_def; + u32 exp_def; + struct v4l2_rect crop; + const struct regval *reg_list; +}; + +struct ov2311 { + struct i2c_client *client; + struct clk *xvclk; + struct gpio_desc *reset_gpio; + struct gpio_desc *pwdn_gpio; + struct regulator_bulk_data supplies[OV2311_NUM_SUPPLIES]; + + struct v4l2_subdev subdev; + struct media_pad pad; + struct v4l2_ctrl_handler ctrl_handler; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *hblank; + struct v4l2_ctrl *vblank; + struct v4l2_ctrl *pixel_rate; + /* + * Mutex for serialized access: + * Protect sensor module set pad format and start/stop streaming safely. + */ + struct mutex mutex; + + /* Streaming on/off */ + bool streaming; + + const struct ov2311_mode *cur_mode; + u32 code; +}; + +#define to_ov2311(sd) container_of(sd, struct ov2311, subdev) + +/* + * Xclk 24Mhz + * max_framerate 60fps for 10 bit, 74.6fps for 8 bit. + */ +static const struct regval ov2311_common_regs[] = { + { 0x0103, 0x01 }, + { 0x0100, 0x00 }, + { 0x0300, 0x01 }, + { 0x0302, 0x32 }, + { 0x0303, 0x00 }, + { 0x0304, 0x03 }, + { 0x0305, 0x02 }, + { 0x0306, 0x01 }, + { 0x030e, 0x04 }, + { 0x3001, 0x02 }, + { 0x3004, 0x00 }, + { 0x3005, 0x00 }, + { 0x3006, 0x00 }, + { 0x3011, 0x0d }, + { 0x3014, 0x04 }, + { 0x301c, 0xf0 }, + { 0x3020, 0x00 }, + { 0x302c, 0x00 }, + { 0x302d, 0x12 }, + { 0x302e, 0x4c }, + { 0x302f, 0x8c }, + { 0x3030, 0x10 }, + { 0x303f, 0x03 }, + { 0x3103, 0x00 }, + { 0x3106, 0x08 }, + { 0x31ff, 0x01 }, + { 0x3501, 0x05 }, + { 0x3502, 0xba }, + { 0x3506, 0x00 }, + { 0x3507, 0x00 }, + { 0x3620, 0x67 }, + { 0x3633, 0x78 }, + { 0x3666, 0x00 }, + { 0x3670, 0x68 }, + { 0x3674, 0x10 }, + { 0x3675, 0x00 }, + { 0x3680, 0x84 }, + { 0x36a2, 0x04 }, + { 0x36a3, 0x80 }, + { 0x36b0, 0x00 }, + { 0x3700, 0x35 }, + { 0x3704, 0x59 }, + { 0x3712, 0x00 }, + { 0x3713, 0x02 }, + { 0x379b, 0x01 }, + { 0x379c, 0x10 }, + { 0x3800, 0x00 }, + { 0x3801, 0x00 }, + { 0x3804, 0x06 }, + { 0x3805, 0x4f }, + { 0x3810, 0x00 }, + { 0x3811, 0x08 }, + { 0x3812, 0x00 }, + { 0x3813, 0x08 }, + { 0x3814, 0x11 }, + { 0x3815, 0x11 }, + { 0x3816, 0x00 }, + { 0x3817, 0x00 }, + { 0x3818, 0x04 }, + { 0x3819, 0x00 }, + { 0x382b, 0x5a }, + { 0x382c, 0x09 }, + { 0x382d, 0x9a }, + { 0x3882, 0x02 }, + { 0x3883, 0x6c }, + { 0x3885, 0x07 }, + { 0x389d, 0x03 }, + { 0x38a6, 0x00 }, + { 0x38a7, 0x01 }, + { 0x38b3, 0x07 }, + { 0x38b1, 0x00 }, + { 0x38e5, 0x02 }, + { 0x38e7, 0x00 }, + { 0x38e8, 0x00 }, + { 0x3910, 0xff }, + { 0x3911, 0xff }, + { 0x3912, 0x08 }, + { 0x3913, 0x00 }, + { 0x3914, 0x00 }, + { 0x3915, 0x00 }, + { 0x391c, 0x00 }, + { 0x3920, 0xa5 }, + { 0x3921, 0x00 }, + { 0x3922, 0x00 }, + { 0x3923, 0x00 }, + { 0x3924, 0x05 }, + { 0x3925, 0x00 }, + { 0x3926, 0x00 }, + { 0x3927, 0x00 }, + { 0x3928, 0x1a }, + { 0x392d, 0x05 }, + { 0x392e, 0xf2 }, + { 0x392f, 0x40 }, + { 0x4001, 0x00 }, + { 0x4003, 0x40 }, + { 0x4008, 0x12 }, + { 0x4009, 0x1b }, + { 0x400c, 0x0c }, + { 0x400d, 0x13 }, + { 0x4010, 0xf0 }, + { 0x4011, 0x00 }, + { 0x4016, 0x00 }, + { 0x4017, 0x04 }, + { 0x4042, 0x11 }, + { 0x4043, 0x70 }, + { 0x4045, 0x00 }, + { 0x4409, 0x5f }, + { 0x450b, 0x00 }, + { 0x4600, 0x00 }, + { 0x4601, 0xa0 }, + { 0x4708, 0x09 }, + { 0x470c, 0x81 }, + { 0x4710, 0x06 }, + { 0x4711, 0x00 }, + { 0x4800, 0x00 }, + { 0x481f, 0x30 }, + { 0x4837, 0x14 }, + { 0x4f00, 0x00 }, + { 0x4f07, 0x00 }, + { 0x4f08, 0x03 }, + { 0x4f09, 0x08 }, + { 0x4f0c, 0x06 }, + { 0x4f0d, 0x02 }, + { 0x4f10, 0x00 }, + { 0x4f11, 0x00 }, + { 0x4f12, 0x07 }, + { 0x4f13, 0xe2 }, + { 0x5000, 0x9f }, + { 0x5001, 0x20 }, + { 0x5026, 0x00 }, + { 0x5c00, 0x00 }, + { 0x5c01, 0x2c }, + { 0x5c02, 0x00 }, + { 0x5c03, 0x7f }, + { 0x5e00, 0x00 }, + { 0x5e01, 0x41 }, + {REG_NULL, 0x00}, +}; + +static const struct regval ov2311_1600x1300_regs[] = { + { 0x3802, 0x00 }, + { 0x3803, 0x00 }, + { 0x3806, 0x05 }, + { 0x3807, 0x23 }, + { 0x3808, 0x06 }, + { 0x3809, 0x40 }, + { 0x380a, 0x05 }, + { 0x380b, 0x14 }, + { 0x380c, 0x03 }, + { 0x380d, 0x88 }, + {REG_NULL, 0x00}, +}; + +static const struct regval ov2311_1600x1080_regs[] = { + { 0x3802, 0x00 }, + { 0x3803, 0x6e }, + { 0x3806, 0x04 }, + { 0x3807, 0xae }, + { 0x3808, 0x06 }, + { 0x3809, 0x40 }, + { 0x380a, 0x04 }, + { 0x380b, 0x38 }, + { 0x380c, 0x03 }, + { 0x380d, 0x88 }, + + { 0x5d01, 0x00 }, + { 0x5d02, 0x04 }, + { 0x5d03, 0x00 }, + { 0x5d04, 0x04 }, + { 0x5d05, 0x00 }, + {REG_NULL, 0x00}, +}; + +static const struct regval op_10bit[] = { + { 0x030d, 0x5a }, + { 0x3662, 0x65 }, + {REG_NULL, 0x00}, +}; + +static const struct regval op_8bit[] = { + { 0x030d, 0x70 }, + { 0x3662, 0x67 }, + {REG_NULL, 0x00}, +}; + +static const struct ov2311_mode supported_modes[] = { + { + .width = 1600, + .height = 1300, + .exp_def = 0x0320, + .hts_def = (0x0388 * 2),/* Registers 0x380c / 0x380d * 2 */ + .vts_def = 0x5c2, /* Registers 0x380e / 0x380f + * 60fps for 10bpp + */ + .crop = { + .left = OV2311_PIXEL_ARRAY_LEFT, + .top = OV2311_PIXEL_ARRAY_TOP, + .width = 1600, + .height = 1300 + }, + .reg_list = ov2311_1600x1300_regs, + }, + { + .width = 1600, + .height = 1080, + .exp_def = 0x0320, + .hts_def = (0x0388 * 2),/* Registers 0x380c / 0x380d * 2 */ + .vts_def = 0x5c2, /* Registers 0x380e / 0x380f + * 60fps for 10bpp + */ + .crop = { + .left = OV2311_PIXEL_ARRAY_LEFT, + .top = 110 + OV2311_PIXEL_ARRAY_TOP, + .width = 1600, + .height = 1080 + }, + .reg_list = ov2311_1600x1080_regs, + }, +}; + +static const s64 link_freq_menu_items[] = { + OV2311_LINK_FREQ +}; + +static const char * const ov2311_test_pattern_menu[] = { + "Disabled", + "Vertical Color Bar Type 1", + "Vertical Color Bar Type 2", + "Vertical Color Bar Type 3", + "Vertical Color Bar Type 4" +}; + +/* Write registers up to 4 at a time */ +static int ov2311_write_reg(struct i2c_client *client, u16 reg, + u32 len, u32 val) +{ + u32 buf_i, val_i; + u8 buf[6]; + u8 *val_p; + __be32 val_be; + + if (len > 4) + return -EINVAL; + + buf[0] = reg >> 8; + buf[1] = reg & 0xff; + + val_be = cpu_to_be32(val); + val_p = (u8 *)&val_be; + buf_i = 2; + val_i = 4 - len; + + while (val_i < 4) + buf[buf_i++] = val_p[val_i++]; + + if (i2c_master_send(client, buf, len + 2) != len + 2) + return -EIO; + + return 0; +} + +static int ov2311_write_array(struct i2c_client *client, + const struct regval *regs) +{ + u32 i; + int ret = 0; + + for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) + ret = ov2311_write_reg(client, regs[i].addr, + OV2311_REG_VALUE_08BIT, regs[i].val); + + return ret; +} + +/* Read registers up to 4 at a time */ +static int ov2311_read_reg(struct i2c_client *client, u16 reg, unsigned int len, + u32 *val) +{ + struct i2c_msg msgs[2]; + u8 *data_be_p; + __be32 data_be = 0; + __be16 reg_addr_be = cpu_to_be16(reg); + int ret; + + if (len > 4 || !len) + return -EINVAL; + + data_be_p = (u8 *)&data_be; + /* Write register address */ + msgs[0].addr = client->addr; + msgs[0].flags = 0; + msgs[0].len = 2; + msgs[0].buf = (u8 *)®_addr_be; + + /* Read data from register */ + msgs[1].addr = client->addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = len; + msgs[1].buf = &data_be_p[4 - len]; + + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (ret != ARRAY_SIZE(msgs)) + return -EIO; + + *val = be32_to_cpu(data_be); + + return 0; +} + +static int ov2311_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct ov2311 *ov2311 = to_ov2311(sd); + const struct ov2311_mode *mode; + s64 h_blank, vblank_def, pixel_rate; + + mutex_lock(&ov2311->mutex); + + mode = v4l2_find_nearest_size(supported_modes, + ARRAY_SIZE(supported_modes), + width, height, + fmt->format.width, + fmt->format.height); + if (fmt->format.code != MEDIA_BUS_FMT_Y8_1X8) + fmt->format.code = MEDIA_BUS_FMT_Y10_1X10; + fmt->format.width = mode->width; + fmt->format.height = mode->height; + fmt->format.field = V4L2_FIELD_NONE; + fmt->format.colorspace = V4L2_COLORSPACE_RAW; + fmt->format.ycbcr_enc = + V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->format.colorspace); + fmt->format.quantization = + V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->format.colorspace, + fmt->format.ycbcr_enc); + fmt->format.xfer_func = + V4L2_MAP_XFER_FUNC_DEFAULT(fmt->format.colorspace); + + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { + *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = + fmt->format; + } else { + ov2311->cur_mode = mode; + ov2311->code = fmt->format.code; + h_blank = mode->hts_def - mode->width; + __v4l2_ctrl_modify_range(ov2311->hblank, h_blank, + h_blank, 1, h_blank); + __v4l2_ctrl_s_ctrl(ov2311->hblank, h_blank); + vblank_def = mode->vts_def - mode->height; + __v4l2_ctrl_modify_range(ov2311->vblank, vblank_def, + OV2311_VTS_MAX - mode->height, + 1, vblank_def); + __v4l2_ctrl_s_ctrl(ov2311->vblank, vblank_def); + + pixel_rate = (fmt->format.code == MEDIA_BUS_FMT_Y10_1X10) ? + OV2311_PIXEL_RATE_10BIT : OV2311_PIXEL_RATE_8BIT; + __v4l2_ctrl_modify_range(ov2311->pixel_rate, pixel_rate, + pixel_rate, 1, pixel_rate); + } + + mutex_unlock(&ov2311->mutex); + + return 0; +} + +static int ov2311_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *fmt) +{ + struct ov2311 *ov2311 = to_ov2311(sd); + const struct ov2311_mode *mode = ov2311->cur_mode; + + mutex_lock(&ov2311->mutex); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { + fmt->format = *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad); + } else { + fmt->format.width = mode->width; + fmt->format.height = mode->height; + fmt->format.code = ov2311->code; + fmt->format.field = V4L2_FIELD_NONE; + fmt->format.colorspace = V4L2_COLORSPACE_SRGB; + fmt->format.ycbcr_enc = + V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->format.colorspace); + fmt->format.quantization = + V4L2_MAP_QUANTIZATION_DEFAULT(true, + fmt->format.colorspace, + fmt->format.ycbcr_enc); + fmt->format.xfer_func = + V4L2_MAP_XFER_FUNC_DEFAULT(fmt->format.colorspace); + } + mutex_unlock(&ov2311->mutex); + + return 0; +} + +static int ov2311_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + switch (code->index) { + default: + return -EINVAL; + case 0: + code->code = MEDIA_BUS_FMT_Y10_1X10; + break; + case 1: + code->code = MEDIA_BUS_FMT_Y8_1X8; + break; + } + + return 0; +} + +static int ov2311_enum_frame_sizes(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (fse->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + if (fse->code != MEDIA_BUS_FMT_Y10_1X10 && + fse->code != MEDIA_BUS_FMT_Y8_1X8) + return -EINVAL; + + fse->min_width = supported_modes[fse->index].width; + fse->max_width = supported_modes[fse->index].width; + fse->max_height = supported_modes[fse->index].height; + fse->min_height = supported_modes[fse->index].height; + + return 0; +} + +static int ov2311_enable_test_pattern(struct ov2311 *ov2311, u32 pattern) +{ + u32 val; + + if (pattern) + val = (pattern - 1) | OV2311_TEST_PATTERN_ENABLE; + else + val = OV2311_TEST_PATTERN_DISABLE; + + return ov2311_write_reg(ov2311->client, OV2311_REG_TEST_PATTERN, + OV2311_REG_VALUE_08BIT, val); +} + +static const struct v4l2_rect * +__ov2311_get_pad_crop(struct ov2311 *ov2311, struct v4l2_subdev_state *sd_state, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + switch (which) { + case V4L2_SUBDEV_FORMAT_TRY: + return v4l2_subdev_get_try_crop(&ov2311->subdev, sd_state, pad); + case V4L2_SUBDEV_FORMAT_ACTIVE: + return &ov2311->cur_mode->crop; + } + + return NULL; +} + +static int ov2311_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_selection *sel) +{ + switch (sel->target) { + case V4L2_SEL_TGT_CROP: { + struct ov2311 *ov2311 = to_ov2311(sd); + + mutex_lock(&ov2311->mutex); + sel->r = *__ov2311_get_pad_crop(ov2311, sd_state, sel->pad, + sel->which); + mutex_unlock(&ov2311->mutex); + + return 0; + } + + case V4L2_SEL_TGT_NATIVE_SIZE: + sel->r.top = 0; + sel->r.left = 0; + sel->r.width = OV2311_NATIVE_WIDTH; + sel->r.height = OV2311_NATIVE_HEIGHT; + + return 0; + + case V4L2_SEL_TGT_CROP_DEFAULT: + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.top = OV2311_PIXEL_ARRAY_TOP; + sel->r.left = OV2311_PIXEL_ARRAY_LEFT; + sel->r.width = OV2311_PIXEL_ARRAY_WIDTH; + sel->r.height = OV2311_PIXEL_ARRAY_HEIGHT; + + return 0; + } + + return -EINVAL; +} + +static int ov2311_start_stream(struct ov2311 *ov2311) +{ + int ret; + + ret = ov2311_write_array(ov2311->client, ov2311_common_regs); + if (ret) + return ret; + + ret = ov2311_write_array(ov2311->client, ov2311->cur_mode->reg_list); + if (ret) + return ret; + + if (ov2311->code == MEDIA_BUS_FMT_Y10_1X10) + ret = ov2311_write_array(ov2311->client, op_10bit); + else + ret = ov2311_write_array(ov2311->client, op_8bit); + if (ret) + return ret; + + /* In case these controls are set before streaming */ + mutex_unlock(&ov2311->mutex); + ret = v4l2_ctrl_handler_setup(&ov2311->ctrl_handler); + mutex_lock(&ov2311->mutex); + if (ret) + return ret; + + return ov2311_write_reg(ov2311->client, OV2311_REG_CTRL_MODE, + OV2311_REG_VALUE_08BIT, OV2311_MODE_STREAMING); +} + +static int ov2311_stop_stream(struct ov2311 *ov2311) +{ + return ov2311_write_reg(ov2311->client, OV2311_REG_CTRL_MODE, + OV2311_REG_VALUE_08BIT, OV2311_MODE_SW_STANDBY); +} + +static int ov2311_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov2311 *ov2311 = to_ov2311(sd); + struct i2c_client *client = ov2311->client; + int ret = 0; + + mutex_lock(&ov2311->mutex); + if (ov2311->streaming == enable) { + mutex_unlock(&ov2311->mutex); + return 0; + } + + if (enable) { + ret = pm_runtime_resume_and_get(&client->dev); + if (ret < 0) + goto unlock_and_return; + + ret = ov2311_start_stream(ov2311); + if (ret) { + v4l2_err(sd, "start stream failed while write regs\n"); + pm_runtime_put(&client->dev); + goto unlock_and_return; + } + } else { + ov2311_stop_stream(ov2311); + pm_runtime_put(&client->dev); + } + + ov2311->streaming = enable; + +unlock_and_return: + mutex_unlock(&ov2311->mutex); + + return ret; +} + +static int ov2311_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov2311 *ov2311 = to_ov2311(sd); + int ret; + + ret = clk_set_rate(ov2311->xvclk, OV2311_XVCLK_FREQ); + if (ret < 0) + dev_warn(dev, "Failed to set xvclk rate (24MHz)\n"); + if (clk_get_rate(ov2311->xvclk) != OV2311_XVCLK_FREQ) + dev_warn(dev, "xvclk mismatched, modes are based on 24MHz - rate is %lu\n", + clk_get_rate(ov2311->xvclk)); + + ret = clk_prepare_enable(ov2311->xvclk); + if (ret < 0) { + dev_err(dev, "Failed to enable xvclk\n"); + return ret; + } + + gpiod_set_value_cansleep(ov2311->reset_gpio, 0); + + ret = regulator_bulk_enable(OV2311_NUM_SUPPLIES, ov2311->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators\n"); + goto disable_clk; + } + + gpiod_set_value_cansleep(ov2311->reset_gpio, 1); + + usleep_range(500, 1000); + gpiod_set_value_cansleep(ov2311->pwdn_gpio, 1); + + usleep_range(1000, 2000); + + return 0; + +disable_clk: + clk_disable_unprepare(ov2311->xvclk); + + return ret; +} + +static int ov2311_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov2311 *ov2311 = to_ov2311(sd); + + gpiod_set_value_cansleep(ov2311->pwdn_gpio, 0); + clk_disable_unprepare(ov2311->xvclk); + gpiod_set_value_cansleep(ov2311->reset_gpio, 0); + regulator_bulk_disable(OV2311_NUM_SUPPLIES, ov2311->supplies); + + return 0; +} + +static int ov2311_runtime_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov2311 *ov2311 = to_ov2311(sd); + int ret; + + if (ov2311->streaming) { + ret = ov2311_start_stream(ov2311); + if (ret) + goto error; + } + return 0; + +error: + ov2311_stop_stream(ov2311); + ov2311->streaming = 0; + return ret; +} + +static int ov2311_runtime_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov2311 *ov2311 = to_ov2311(sd); + + if (ov2311->streaming) + ov2311_stop_stream(ov2311); + + return 0; +} + +static int ov2311_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct ov2311 *ov2311 = to_ov2311(sd); + struct v4l2_mbus_framefmt *try_fmt = + v4l2_subdev_get_try_format(sd, fh->state, 0); + const struct ov2311_mode *def_mode = &supported_modes[0]; + + mutex_lock(&ov2311->mutex); + /* Initialize try_fmt */ + try_fmt->width = def_mode->width; + try_fmt->height = def_mode->height; + try_fmt->code = MEDIA_BUS_FMT_Y10_1X10; + try_fmt->field = V4L2_FIELD_NONE; + try_fmt->colorspace = V4L2_COLORSPACE_RAW; + try_fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(try_fmt->colorspace); + try_fmt->quantization = + V4L2_MAP_QUANTIZATION_DEFAULT(true, try_fmt->colorspace, + try_fmt->ycbcr_enc); + try_fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(try_fmt->colorspace); + + mutex_unlock(&ov2311->mutex); + /* No crop or compose */ + + return 0; +} + +static const struct dev_pm_ops ov2311_pm_ops = { + SET_RUNTIME_PM_OPS(ov2311_runtime_suspend, ov2311_runtime_resume, NULL) + SET_RUNTIME_PM_OPS(ov2311_power_off, ov2311_power_on, NULL) +}; + +static const struct v4l2_subdev_internal_ops ov2311_internal_ops = { + .open = ov2311_open, +}; + +static const struct v4l2_subdev_core_ops ov2311_core_ops = { + .subscribe_event = v4l2_ctrl_subdev_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_video_ops ov2311_video_ops = { + .s_stream = ov2311_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov2311_pad_ops = { + .enum_mbus_code = ov2311_enum_mbus_code, + .enum_frame_size = ov2311_enum_frame_sizes, + .get_fmt = ov2311_get_fmt, + .set_fmt = ov2311_set_fmt, + .get_selection = ov2311_get_selection, +}; + +static const struct v4l2_subdev_ops ov2311_subdev_ops = { + .core = &ov2311_core_ops, + .video = &ov2311_video_ops, + .pad = &ov2311_pad_ops, +}; + +static int ov2311_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov2311 *ov2311 = container_of(ctrl->handler, + struct ov2311, ctrl_handler); + struct i2c_client *client = ov2311->client; + s64 max; + int ret = 0; + + /* Propagate change of current control to all related controls */ + switch (ctrl->id) { + case V4L2_CID_VBLANK: + /* Update max exposure while meeting expected vblanking */ + max = ov2311->cur_mode->height + ctrl->val - 4; + __v4l2_ctrl_modify_range(ov2311->exposure, + ov2311->exposure->minimum, max, + ov2311->exposure->step, + ov2311->exposure->default_value); + break; + } + + if (pm_runtime_get(&client->dev) <= 0) + return 0; + + switch (ctrl->id) { + case V4L2_CID_EXPOSURE: + ret = ov2311_write_reg(ov2311->client, OV2311_REG_EXPOSURE, + OV2311_REG_VALUE_16BIT, ctrl->val); + break; + case V4L2_CID_ANALOGUE_GAIN: + ret = ov2311_write_reg(ov2311->client, OV2311_REG_GAIN_H, + OV2311_REG_VALUE_08BIT, + (ctrl->val >> OV2311_GAIN_H_SHIFT) & + OV2311_GAIN_H_MASK); + ret |= ov2311_write_reg(ov2311->client, OV2311_REG_GAIN_L, + OV2311_REG_VALUE_08BIT, + ctrl->val & OV2311_GAIN_L_MASK); + break; + case V4L2_CID_VBLANK: + ret = ov2311_write_reg(ov2311->client, OV2311_REG_VTS, + OV2311_REG_VALUE_16BIT, + ctrl->val + ov2311->cur_mode->height); + break; + case V4L2_CID_TEST_PATTERN: + ret = ov2311_enable_test_pattern(ov2311, ctrl->val); + break; + case V4L2_CID_HFLIP: + ret = ov2311_write_reg(ov2311->client, OV2311_REG_H_FLIP, + OV2311_REG_VALUE_08BIT, + ctrl->val ? OV2311_FLIP_BIT : 0); + break; + case V4L2_CID_VFLIP: + ret = ov2311_write_reg(ov2311->client, OV2311_REG_V_FLIP, + OV2311_REG_VALUE_08BIT, + ctrl->val ? OV2311_FLIP_BIT : 0); + break; + default: + dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", + __func__, ctrl->id, ctrl->val); + break; + } + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops ov2311_ctrl_ops = { + .s_ctrl = ov2311_set_ctrl, +}; + +static int ov2311_initialize_controls(struct ov2311 *ov2311) +{ + struct v4l2_fwnode_device_properties props; + const struct ov2311_mode *mode; + struct v4l2_ctrl_handler *handler; + struct v4l2_ctrl *ctrl; + s64 exposure_max, vblank_def; + u32 h_blank; + int ret; + + handler = &ov2311->ctrl_handler; + mode = ov2311->cur_mode; + ret = v4l2_ctrl_handler_init(handler, 11); + if (ret) + return ret; + handler->lock = &ov2311->mutex; + + ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, + 0, 0, link_freq_menu_items); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + ov2311->pixel_rate = v4l2_ctrl_new_std(handler, NULL, + V4L2_CID_PIXEL_RATE, + OV2311_PIXEL_RATE_10BIT, + OV2311_PIXEL_RATE_10BIT, 1, + OV2311_PIXEL_RATE_10BIT); + + h_blank = mode->hts_def - mode->width; + ov2311->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, + h_blank, h_blank, 1, h_blank); + if (ov2311->hblank) + ov2311->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + vblank_def = mode->vts_def - mode->height; + ov2311->vblank = v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops, + V4L2_CID_VBLANK, vblank_def, + OV2311_VTS_MAX - mode->height, 1, + vblank_def); + + exposure_max = mode->vts_def - 4; + ov2311->exposure = v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops, + V4L2_CID_EXPOSURE, + OV2311_EXPOSURE_MIN, exposure_max, + OV2311_EXPOSURE_STEP, + mode->exp_def); + + v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, + OV2311_GAIN_MIN, OV2311_GAIN_MAX, OV2311_GAIN_STEP, + OV2311_GAIN_DEFAULT); + + v4l2_ctrl_new_std_menu_items(handler, &ov2311_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov2311_test_pattern_menu) - 1, + 0, 0, ov2311_test_pattern_menu); + + v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + + v4l2_ctrl_new_std(handler, &ov2311_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + + ret = v4l2_fwnode_device_parse(&ov2311->client->dev, &props); + if (ret) + goto err_free_handler; + + ret = v4l2_ctrl_new_fwnode_properties(handler, &ov2311_ctrl_ops, + &props); + if (ret) + goto err_free_handler; + + if (handler->error) { + ret = handler->error; + dev_err(&ov2311->client->dev, + "Failed to init controls(%d)\n", ret); + goto err_free_handler; + } + + ov2311->subdev.ctrl_handler = handler; + + return 0; + +err_free_handler: + v4l2_ctrl_handler_free(handler); + + return ret; +} + +static int ov2311_check_sensor_id(struct ov2311 *ov2311, + struct i2c_client *client) +{ + struct device *dev = &ov2311->client->dev; + u32 id = 0, id_msb; + int ret; + + ret = ov2311_read_reg(client, OV2311_REG_CHIP_ID + 1, + OV2311_REG_VALUE_08BIT, &id); + if (!ret) + ret = ov2311_read_reg(client, OV2311_REG_CHIP_ID, + OV2311_REG_VALUE_08BIT, &id_msb); + id |= (id_msb << 8); + if (ret || id != CHIP_ID) { + dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret); + return -ENODEV; + } + + dev_info(dev, "Detected OV%06x sensor\n", CHIP_ID); + + return 0; +} + +static int ov2311_configure_regulators(struct ov2311 *ov2311) +{ + unsigned int i; + + for (i = 0; i < OV2311_NUM_SUPPLIES; i++) + ov2311->supplies[i].supply = ov2311_supply_names[i]; + + return devm_regulator_bulk_get(&ov2311->client->dev, + OV2311_NUM_SUPPLIES, + ov2311->supplies); +} + +static int ov2311_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ov2311 *ov2311; + struct v4l2_subdev *sd; + int ret; + + ov2311 = devm_kzalloc(dev, sizeof(*ov2311), GFP_KERNEL); + if (!ov2311) + return -ENOMEM; + + ov2311->client = client; + ov2311->cur_mode = &supported_modes[0]; + + ov2311->xvclk = devm_clk_get(dev, "xvclk"); + if (IS_ERR(ov2311->xvclk)) { + dev_err(dev, "Failed to get xvclk\n"); + return -EINVAL; + } + + ov2311->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ov2311->reset_gpio)) + dev_warn(dev, "Failed to get reset-gpios\n"); + + ov2311->pwdn_gpio = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_LOW); + if (IS_ERR(ov2311->pwdn_gpio)) + dev_warn(dev, "Failed to get pwdn-gpios\n"); + + ret = ov2311_configure_regulators(ov2311); + if (ret) { + dev_err(dev, "Failed to get power regulators\n"); + return ret; + } + + mutex_init(&ov2311->mutex); + + sd = &ov2311->subdev; + v4l2_i2c_subdev_init(sd, client, &ov2311_subdev_ops); + ret = ov2311_initialize_controls(ov2311); + if (ret) + goto err_destroy_mutex; + + ret = ov2311_power_on(&client->dev); + if (ret) + goto err_free_handler; + + ret = ov2311_check_sensor_id(ov2311, client); + if (ret) + goto err_power_off; + + sd->internal_ops = &ov2311_internal_ops; + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + ov2311->pad.flags = MEDIA_PAD_FL_SOURCE; + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; + ret = media_entity_pads_init(&sd->entity, 1, &ov2311->pad); + if (ret < 0) + goto err_power_off; + + ret = v4l2_async_register_subdev(sd); + if (ret) { + dev_err(dev, "v4l2 async register subdev failed\n"); + goto err_clean_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + return 0; + +err_clean_entity: + media_entity_cleanup(&sd->entity); +err_power_off: + ov2311_power_off(&client->dev); +err_free_handler: + v4l2_ctrl_handler_free(&ov2311->ctrl_handler); +err_destroy_mutex: + mutex_destroy(&ov2311->mutex); + + return ret; +} + +static void ov2311_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov2311 *ov2311 = to_ov2311(sd); + + v4l2_async_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(&ov2311->ctrl_handler); + mutex_destroy(&ov2311->mutex); + + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + ov2311_power_off(&client->dev); + pm_runtime_set_suspended(&client->dev); +} + +static const struct of_device_id ov2311_of_match[] = { + { .compatible = "ovti,ov2311" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ov2311_of_match); + +static const struct i2c_device_id ov2311_match_id[] = { + { "ovti,ov2311", 0 }, + { }, +}; + +static struct i2c_driver ov2311_i2c_driver = { + .driver = { + .name = OV2311_NAME, + .pm = &ov2311_pm_ops, + .of_match_table = of_match_ptr(ov2311_of_match), + }, + .probe = &ov2311_probe, + .remove = &ov2311_remove, + .id_table = ov2311_match_id, +}; + +module_i2c_driver(ov2311_i2c_driver); + +MODULE_AUTHOR("Dave Stevenson