diff options
Diffstat (limited to 'drivers/media/i2c/thp7312.c')
| -rw-r--r-- | drivers/media/i2c/thp7312.c | 2256 |
1 files changed, 2256 insertions, 0 deletions
diff --git a/drivers/media/i2c/thp7312.c b/drivers/media/i2c/thp7312.c new file mode 100644 index 0000000000..2806887514 --- /dev/null +++ b/drivers/media/i2c/thp7312.c @@ -0,0 +1,2256 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2021 THine Electronics, Inc. + * Copyright (C) 2023 Ideas on Board Oy + */ + +#include <asm/unaligned.h> + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/firmware.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/iopoll.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mtd/spi-nor.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/types.h> + +#include <media/v4l2-async.h> +#include <media/v4l2-cci.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-event.h> +#include <media/v4l2-fwnode.h> +#include <media/v4l2-subdev.h> + +#include <uapi/linux/thp7312.h> + +/* ISP registers */ + +#define THP7312_REG_FIRMWARE_VERSION_1 CCI_REG8(0xf000) +#define THP7312_REG_CAMERA_STATUS CCI_REG8(0xf001) +#define THP7312_REG_FIRMWARE_VERSION_2 CCI_REG8(0xf005) +#define THP7312_REG_SET_OUTPUT_ENABLE CCI_REG8(0xf008) +#define THP7312_OUTPUT_ENABLE 0x01 +#define THP7312_OUTPUT_DISABLE 0x00 +#define THP7312_REG_SET_OUTPUT_COLOR_COMPRESSION CCI_REG8(0xf009) +#define THP7312_REG_SET_OUTPUT_COLOR_UYVY 0x00 +#define THP7312_REG_SET_OUTPUT_COLOR_YUY2 0x04 +#define THP7312_REG_FLIP_MIRROR CCI_REG8(0xf00c) +#define THP7312_REG_FLIP_MIRROR_FLIP BIT(0) +#define THP7312_REG_FLIP_MIRROR_MIRROR BIT(1) +#define THP7312_REG_VIDEO_IMAGE_SIZE CCI_REG8(0xf00d) +#define THP7312_VIDEO_IMAGE_SIZE_640x360 0x52 +#define THP7312_VIDEO_IMAGE_SIZE_640x460 0x03 +#define THP7312_VIDEO_IMAGE_SIZE_1280x720 0x0a +#define THP7312_VIDEO_IMAGE_SIZE_1920x1080 0x0b +#define THP7312_VIDEO_IMAGE_SIZE_3840x2160 0x0d +#define THP7312_VIDEO_IMAGE_SIZE_4160x3120 0x14 +#define THP7312_VIDEO_IMAGE_SIZE_2016x1512 0x20 +#define THP7312_VIDEO_IMAGE_SIZE_2048x1536 0x21 +#define THP7312_REG_VIDEO_FRAME_RATE_MODE CCI_REG8(0xf00f) +#define THP7312_VIDEO_FRAME_RATE_MODE1 0x80 +#define THP7312_VIDEO_FRAME_RATE_MODE2 0x81 +#define THP7312_VIDEO_FRAME_RATE_MODE3 0x82 +#define THP7312_REG_SET_DRIVING_MODE CCI_REG8(0xf010) +#define THP7312_REG_DRIVING_MODE_STATUS CCI_REG8(0xf011) +#define THP7312_REG_JPEG_COMPRESSION_FACTOR CCI_REG8(0xf01b) +#define THP7312_REG_AE_EXPOSURE_COMPENSATION CCI_REG8(0xf022) +#define THP7312_REG_AE_FLICKER_MODE CCI_REG8(0xf023) +#define THP7312_AE_FLICKER_MODE_50 0x00 +#define THP7312_AE_FLICKER_MODE_60 0x01 +#define THP7312_AE_FLICKER_MODE_DISABLE 0x80 +#define THP7312_REG_AE_FIX_FRAME_RATE CCI_REG8(0xf02e) +#define THP7312_REG_MANUAL_WB_RED_GAIN CCI_REG8(0xf036) +#define THP7312_REG_MANUAL_WB_BLUE_GAIN CCI_REG8(0xf037) +#define THP7312_REG_WB_MODE CCI_REG8(0xf039) +#define THP7312_WB_MODE_AUTO 0x00 +#define THP7312_WB_MODE_MANUAL 0x11 +#define THP7312_REG_MANUAL_FOCUS_POSITION CCI_REG16(0xf03c) +#define THP7312_REG_AF_CONTROL CCI_REG8(0xf040) +#define THP7312_REG_AF_CONTROL_AF 0x01 +#define THP7312_REG_AF_CONTROL_MANUAL 0x10 +#define THP7312_REG_AF_CONTROL_LOCK 0x80 +#define THP7312_REG_AF_SETTING CCI_REG8(0xf041) +#define THP7312_REG_AF_SETTING_ONESHOT_CONTRAST 0x00 +#define THP7312_REG_AF_SETTING_ONESHOT_PDAF 0x40 +#define THP7312_REG_AF_SETTING_ONESHOT_HYBRID 0x80 +#define THP7312_REG_AF_SETTING_CONTINUOUS_CONTRAST 0x30 +#define THP7312_REG_AF_SETTING_CONTINUOUS_PDAF 0x70 +#define THP7312_REG_AF_SETTING_CONTINUOUS_HYBRID 0xf0 +#define THP7312_REG_AF_SUPPORT CCI_REG8(0xf043) +#define THP7312_AF_SUPPORT_PDAF BIT(1) +#define THP7312_AF_SUPPORT_CONTRAST BIT(0) +#define THP7312_REG_SATURATION CCI_REG8(0xf052) +#define THP7312_REG_SHARPNESS CCI_REG8(0xf053) +#define THP7312_REG_BRIGHTNESS CCI_REG8(0xf056) +#define THP7312_REG_CONTRAST CCI_REG8(0xf057) +#define THP7312_REG_NOISE_REDUCTION CCI_REG8(0xf059) +#define THP7312_REG_NOISE_REDUCTION_FIXED BIT(7) + +#define TH7312_REG_CUSTOM_MIPI_SET CCI_REG8(0xf0f6) +#define TH7312_REG_CUSTOM_MIPI_STATUS CCI_REG8(0xf0f7) +#define TH7312_REG_CUSTOM_MIPI_RD CCI_REG8(0xf0f8) +#define TH7312_REG_CUSTOM_MIPI_TD CCI_REG8(0xf0f9) + +/* + * Firmware update registers. Those use a different address space than the + * normal operation ISP registers. + */ + +#define THP7312_REG_FW_DRIVABILITY CCI_REG32(0xd65c) +#define THP7312_REG_FW_DEST_BANK_ADDR CCI_REG32(0xff08) +#define THP7312_REG_FW_VERIFY_RESULT CCI_REG8(0xff60) +#define THP7312_REG_FW_RESET_FLASH CCI_REG8(0xff61) +#define THP7312_REG_FW_MEMORY_IO_SETTING CCI_REG8(0xff62) +#define THP7312_FW_MEMORY_IO_GPIO0 1 +#define THP7312_FW_MEMORY_IO_GPIO1 0 +#define THP7312_REG_FW_CRC_RESULT CCI_REG32(0xff64) +#define THP7312_REG_FW_STATUS CCI_REG8(0xfffc) + +#define THP7312_FW_VERSION(major, minor) (((major) << 8) | (minor)) +#define THP7312_FW_VERSION_MAJOR(v) ((v) >> 8) +#define THP7312_FW_VERSION_MINOR(v) ((v) & 0xff) + +enum thp7312_focus_method { + THP7312_FOCUS_METHOD_CONTRAST, + THP7312_FOCUS_METHOD_PDAF, + THP7312_FOCUS_METHOD_HYBRID, +}; + +/* + * enum thp7312_focus_state - State of the focus handler + * + * @THP7312_FOCUS_STATE_MANUAL: Manual focus, controlled through the + * V4L2_CID_FOCUS_ABSOLUTE control + * @THP7312_FOCUS_STATE_AUTO: Continuous auto-focus + * @THP7312_FOCUS_STATE_LOCKED: Lock the focus to a fixed position. This state + * is entered when switching from auto to manual mode. + * @THP7312_FOCUS_STATE_ONESHOT: One-shot auto-focus + * + * Valid transitions are as follow: + * + * digraph fsm { + * node [shape=circle]; + * + * manual [label="MANUAL"]; + * auto [label="AUTO"]; + * locked [label="LOCKED"]; + * oneshot [label="ONESHOT"]; + * + * manual -> auto [label="FOCUS_AUTO <- true"] + * locked -> auto [label="FOCUS_AUTO <- true"] + * oneshot -> auto [label="FOCUS_AUTO <- true"] + * auto -> locked [label="FOCUS_AUTO <- false"] + * + * locked -> manual [label="FOCUS_ABSOLUTE <- *"] + * oneshot -> manual [label="FOCUS_ABSOLUTE <- *"] + * + * manual -> oneshot [label="FOCUS_START <- *"] + * locked -> oneshot [label="FOCUS_START <- *"] + * } + */ +enum thp7312_focus_state { + THP7312_FOCUS_STATE_MANUAL, + THP7312_FOCUS_STATE_AUTO, + THP7312_FOCUS_STATE_LOCKED, + THP7312_FOCUS_STATE_ONESHOT, +}; + +enum thp7312_boot_mode { + THP7312_BOOT_MODE_2WIRE_SLAVE = 0, + THP7312_BOOT_MODE_SPI_MASTER = 1, +}; + +struct thp7312_frame_rate { + u32 fps; + u32 link_freq; + u8 reg_frame_rate_mode; +}; + +struct thp7312_mode_info { + u32 width; + u32 height; + u8 reg_image_size; + const struct thp7312_frame_rate *rates; +}; + +static const u32 thp7312_colour_fmts[] = { + MEDIA_BUS_FMT_YUYV8_1X16, +}; + +/* regulator supplies */ +static const char * const thp7312_supply_name[] = { + "vddcore", + "vhtermrx", + "vddtx", + "vddhost", + "vddcmos", + "vddgpio-0", + "vddgpio-1", +}; + +static const struct thp7312_mode_info thp7312_mode_info_data[] = { + { + .width = 1920, + .height = 1080, + .reg_image_size = THP7312_VIDEO_IMAGE_SIZE_1920x1080, + .rates = (const struct thp7312_frame_rate[]) { + { 30, 300000000, 0x81 }, + { 60, 387500000, 0x82 }, + { 0 } + }, + }, { + .width = 2048, + .height = 1536, + .reg_image_size = THP7312_VIDEO_IMAGE_SIZE_2048x1536, + .rates = (const struct thp7312_frame_rate[]) { + { 30, 300000000, 0x81 }, + { 0 } + } + }, { + .width = 3840, + .height = 2160, + .reg_image_size = THP7312_VIDEO_IMAGE_SIZE_3840x2160, + .rates = (const struct thp7312_frame_rate[]) { + { 30, 600000000, 0x81 }, + { 0 } + }, + }, { + .width = 4160, + .height = 3120, + .reg_image_size = THP7312_VIDEO_IMAGE_SIZE_4160x3120, + .rates = (const struct thp7312_frame_rate[]) { + { 20, 600000000, 0x81 }, + { 0 } + }, + }, +}; + +struct thp7312_device; + +struct thp7312_sensor_info { + const char *model; +}; + +struct thp7312_sensor { + const struct thp7312_sensor_info *info; + u8 lane_remap; +}; + +struct thp7312_device { + struct device *dev; + struct regmap *regmap; + + struct v4l2_subdev sd; + struct media_pad pad; + + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[ARRAY_SIZE(thp7312_supply_name)]; + struct clk *iclk; + + u8 lane_remap; + + struct thp7312_sensor sensors[1]; + + enum thp7312_boot_mode boot_mode; + + struct v4l2_ctrl_handler ctrl_handler; + bool ctrls_applied; + + s64 link_freq; + + struct { + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; + }; + + struct { + struct v4l2_ctrl *focus_auto; + struct v4l2_ctrl *focus_absolute; + struct v4l2_ctrl *focus_start; + struct v4l2_ctrl *focus_method; + }; + + enum thp7312_focus_state focus_state; + + struct { + struct v4l2_ctrl *noise_reduction_auto; + struct v4l2_ctrl *noise_reduction_absolute; + }; + + /* Lock to protect fw_cancel */ + struct mutex fw_lock; + struct fw_upload *fwl; + u8 *fw_write_buf; + bool fw_cancel; + + u16 fw_version; +}; + +static const struct thp7312_sensor_info thp7312_sensor_info[] = { + { + .model = "sony,imx258", + }, +}; + +static inline struct thp7312_device *to_thp7312_dev(struct v4l2_subdev *sd) +{ + return container_of(sd, struct thp7312_device, sd); +} + +static const struct thp7312_mode_info * +thp7312_find_mode(unsigned int width, unsigned int height, bool nearest) +{ + const struct thp7312_mode_info *mode; + + mode = v4l2_find_nearest_size(thp7312_mode_info_data, + ARRAY_SIZE(thp7312_mode_info_data), + width, height, width, height); + + if (!nearest && (mode->width != width || mode->height != height)) + return NULL; + + return mode; +} + +static const struct thp7312_frame_rate * +thp7312_find_rate(const struct thp7312_mode_info *mode, unsigned int fps, + bool nearest) +{ + const struct thp7312_frame_rate *best_rate = NULL; + const struct thp7312_frame_rate *rate; + unsigned int best_delta = UINT_MAX; + + if (!mode) + return NULL; + + for (rate = mode->rates; rate->fps && best_delta; ++rate) { + unsigned int delta = abs(rate->fps - fps); + + if (delta <= best_delta) { + best_delta = delta; + best_rate = rate; + } + } + + if (!nearest && best_delta) + return NULL; + + return best_rate; +} + +/* ----------------------------------------------------------------------------- + * Device Access & Configuration + */ + +#define thp7312_read_poll_timeout(dev, addr, val, cond, sleep_us, timeout_us) \ +({ \ + int __ret, __err; \ + __ret = read_poll_timeout(cci_read, __err, __err || (cond), sleep_us, \ + timeout_us, false, (dev)->regmap, addr, \ + &(val), NULL); \ + __ret ? : __err; \ +}) + +static int thp7312_map_data_lanes(u8 *lane_remap, const u8 *lanes, u8 num_lanes) +{ + u8 used_lanes = 0; + u8 val = 0; + unsigned int i; + + /* + * The value that we write to the register is the index in the + * data-lanes array, so we need to do a conversion. Do this in the same + * pass as validating data-lanes. + */ + for (i = 0; i < num_lanes; i++) { + if (lanes[i] < 1 || lanes[i] > 4) + return -EINVAL; + + if (used_lanes & (BIT(lanes[i]))) + return -EINVAL; + + used_lanes |= BIT(lanes[i]); + + /* + * data-lanes is 1-indexed while the field position in the + * register is 0-indexed. + */ + val |= i << ((lanes[i] - 1) * 2); + } + + *lane_remap = val; + + return 0; +} + +static int thp7312_set_mipi_lanes(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + int ret = 0; + u64 val; + + cci_write(thp7312->regmap, TH7312_REG_CUSTOM_MIPI_RD, + thp7312->sensors[0].lane_remap, &ret); + cci_write(thp7312->regmap, TH7312_REG_CUSTOM_MIPI_TD, + thp7312->lane_remap, &ret); + cci_write(thp7312->regmap, TH7312_REG_CUSTOM_MIPI_SET, 1, &ret); + + if (ret) + return ret; + + ret = thp7312_read_poll_timeout(thp7312, TH7312_REG_CUSTOM_MIPI_STATUS, + val, val == 0x00, 100000, 2000000); + if (ret) { + dev_err(dev, "Failed to poll MIPI lane status: %d\n", ret); + return ret; + } + + return 0; +} + +static int thp7312_change_mode(struct thp7312_device *thp7312, + const struct thp7312_mode_info *mode, + const struct thp7312_frame_rate *rate) +{ + struct device *dev = thp7312->dev; + u64 val = 0; + int ret; + + ret = thp7312_read_poll_timeout(thp7312, THP7312_REG_CAMERA_STATUS, val, + val == 0x80, 20000, 200000); + if (ret < 0) { + dev_err(dev, "%s(): failed to poll ISP: %d\n", __func__, ret); + return ret; + } + + cci_write(thp7312->regmap, THP7312_REG_VIDEO_IMAGE_SIZE, + mode->reg_image_size, &ret); + cci_write(thp7312->regmap, THP7312_REG_VIDEO_FRAME_RATE_MODE, + rate->reg_frame_rate_mode, &ret); + cci_write(thp7312->regmap, THP7312_REG_JPEG_COMPRESSION_FACTOR, 0x5e, + &ret); + cci_write(thp7312->regmap, THP7312_REG_SET_DRIVING_MODE, 0x01, &ret); + + if (ret) + return ret; + + ret = thp7312_read_poll_timeout(thp7312, THP7312_REG_DRIVING_MODE_STATUS, + val, val == 0x01, 20000, 100000); + if (ret < 0) { + dev_err(dev, "%s(): failed\n", __func__); + return ret; + } + + return 0; +} + +static int thp7312_set_framefmt(struct thp7312_device *thp7312, + struct v4l2_mbus_framefmt *format) +{ + u8 val; + + switch (format->code) { + case MEDIA_BUS_FMT_UYVY8_1X16: + /* YUV422, UYVY */ + val = THP7312_REG_SET_OUTPUT_COLOR_UYVY; + break; + case MEDIA_BUS_FMT_YUYV8_1X16: + /* YUV422, YUYV */ + val = THP7312_REG_SET_OUTPUT_COLOR_YUY2; + break; + default: + /* Should never happen */ + return -EINVAL; + } + + return cci_write(thp7312->regmap, + THP7312_REG_SET_OUTPUT_COLOR_COMPRESSION, val, NULL); +} + +static int thp7312_init_mode(struct thp7312_device *thp7312, + struct v4l2_subdev_state *sd_state) +{ + const struct thp7312_mode_info *mode; + const struct thp7312_frame_rate *rate; + struct v4l2_mbus_framefmt *fmt; + struct v4l2_fract *interval; + int ret; + + /* + * TODO: The mode and rate should be cached in the subdev state, once + * support for extending states will be available. + */ + fmt = v4l2_subdev_state_get_format(sd_state, 0); + interval = v4l2_subdev_state_get_interval(sd_state, 0); + + mode = thp7312_find_mode(fmt->width, fmt->height, false); + rate = thp7312_find_rate(mode, interval->denominator, false); + + if (WARN_ON(!mode || !rate)) + return -EINVAL; + + ret = thp7312_set_framefmt(thp7312, fmt); + if (ret) + return ret; + + return thp7312_change_mode(thp7312, mode, rate); +} + +static int thp7312_stream_enable(struct thp7312_device *thp7312, bool enable) +{ + return cci_write(thp7312->regmap, THP7312_REG_SET_OUTPUT_ENABLE, + enable ? THP7312_OUTPUT_ENABLE : THP7312_OUTPUT_DISABLE, + NULL); +} + +static int thp7312_check_status_stream_mode(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + u64 status = 0; + int ret; + + while (status != 0x80) { + ret = cci_read(thp7312->regmap, THP7312_REG_CAMERA_STATUS, + &status, NULL); + if (ret) + return ret; + + if (status == 0x80) { + dev_dbg(dev, "Camera initialization done\n"); + return 0; + } + + if (status != 0x00) { + dev_err(dev, "Invalid camera status %llx\n", status); + return -EINVAL; + } + + dev_dbg(dev, "Camera initializing...\n"); + usleep_range(70000, 80000); + } + + return 0; +} + +static void thp7312_reset(struct thp7312_device *thp7312) +{ + unsigned long rate; + + gpiod_set_value_cansleep(thp7312->reset_gpio, 1); + + /* + * The minimum reset duration is 8 clock cycles, make it 10 to provide + * a safety margin. + */ + rate = clk_get_rate(thp7312->iclk); + fsleep(DIV_ROUND_UP(10 * USEC_PER_SEC, rate)); + + gpiod_set_value_cansleep(thp7312->reset_gpio, 0); + + /* + * TODO: The documentation states that the device needs 2ms to + * initialize after reset is deasserted. It then proceeds to load the + * firmware from the flash memory, which takes an unspecified amount of + * time. Check if this delay could be reduced. + */ + fsleep(300000); +} + +/* ----------------------------------------------------------------------------- + * Power Management + */ + +static void __thp7312_power_off(struct thp7312_device *thp7312) +{ + regulator_bulk_disable(ARRAY_SIZE(thp7312->supplies), thp7312->supplies); + clk_disable_unprepare(thp7312->iclk); +} + +static void thp7312_power_off(struct thp7312_device *thp7312) +{ + __thp7312_power_off(thp7312); +} + +static int __thp7312_power_on(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(thp7312->supplies), + thp7312->supplies); + if (ret < 0) + return ret; + + ret = clk_prepare_enable(thp7312->iclk); + if (ret < 0) { + dev_err(dev, "clk prepare enable failed\n"); + regulator_bulk_disable(ARRAY_SIZE(thp7312->supplies), + thp7312->supplies); + return ret; + } + + /* + * We cannot assume that turning off and on again will reset, so do a + * software reset on power up. + */ + thp7312_reset(thp7312); + + return 0; +} + +static int thp7312_power_on(struct thp7312_device *thp7312) +{ + int ret; + + ret = __thp7312_power_on(thp7312); + if (ret < 0) + return ret; + + ret = thp7312_check_status_stream_mode(thp7312); + if (ret < 0) + goto error; + + ret = thp7312_set_mipi_lanes(thp7312); + if (ret) + goto error; + + return 0; + +error: + thp7312_power_off(thp7312); + return ret; +} + +static int __maybe_unused thp7312_pm_runtime_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct thp7312_device *thp7312 = to_thp7312_dev(sd); + + thp7312_power_off(thp7312); + + thp7312->ctrls_applied = false; + + return 0; +} + +static int __maybe_unused thp7312_pm_runtime_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct thp7312_device *thp7312 = to_thp7312_dev(sd); + + return thp7312_power_on(thp7312); +} + +static const struct dev_pm_ops thp7312_pm_ops = { + SET_RUNTIME_PM_OPS(thp7312_pm_runtime_suspend, + thp7312_pm_runtime_resume, NULL) +}; + +/* ----------------------------------------------------------------------------- + * V4L2 Subdev Operations + */ + +static bool thp7312_find_bus_code(u32 code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(thp7312_colour_fmts); ++i) { + if (thp7312_colour_fmts[i] == code) + return true; + } + + return false; +} + +static int thp7312_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->index >= ARRAY_SIZE(thp7312_colour_fmts)) + return -EINVAL; + + code->code = thp7312_colour_fmts[code->index]; + + return 0; +} + +static int thp7312_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (!thp7312_find_bus_code(fse->code)) + return -EINVAL; + + if (fse->index >= ARRAY_SIZE(thp7312_mode_info_data)) + return -EINVAL; + + fse->min_width = thp7312_mode_info_data[fse->index].width; + fse->max_width = fse->min_width; + fse->min_height = thp7312_mode_info_data[fse->index].height; + fse->max_height = fse->min_height; + + return 0; +} + +static int thp7312_enum_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_interval_enum *fie) +{ + const struct thp7312_frame_rate *rate; + const struct thp7312_mode_info *mode; + unsigned int index = fie->index; + + if (!thp7312_find_bus_code(fie->code)) + return -EINVAL; + + mode = thp7312_find_mode(fie->width, fie->height, false); + if (!mode) + return -EINVAL; + + for (rate = mode->rates; rate->fps; ++rate, --index) { + if (!index) { + fie->interval.numerator = 1; + fie->interval.denominator = rate->fps; + + return 0; + } + } + + return -EINVAL; +} + +static int thp7312_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *format) +{ + struct thp7312_device *thp7312 = to_thp7312_dev(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &format->format; + struct v4l2_mbus_framefmt *fmt; + struct v4l2_fract *interval; + const struct thp7312_mode_info *mode; + + if (!thp7312_find_bus_code(mbus_fmt->code)) + mbus_fmt->code = thp7312_colour_fmts[0]; + + mode = thp7312_find_mode(mbus_fmt->width, mbus_fmt->height, true); + + fmt = v4l2_subdev_state_get_format(sd_state, 0); + + fmt->code = mbus_fmt->code; + fmt->width = mode->width; + fmt->height = mode->height; + fmt->colorspace = V4L2_COLORSPACE_SRGB; + fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace); + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; + fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace); + + *mbus_fmt = *fmt; + + interval = v4l2_subdev_state_get_interval(sd_state, 0); + interval->numerator = 1; + interval->denominator = mode->rates[0].fps; + + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) + thp7312->link_freq = mode->rates[0].link_freq; + + return 0; +} + +static int thp7312_set_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_frame_interval *fi) +{ + struct thp7312_device *thp7312 = to_thp7312_dev(sd); + const struct thp7312_mode_info *mode; + const struct thp7312_frame_rate *rate; + const struct v4l2_mbus_framefmt *fmt; + struct v4l2_fract *interval; + unsigned int fps; + + /* Avoid divisions by 0, pick the highest frame if the interval is 0. */ + fps = fi->interval.numerator + ? DIV_ROUND_CLOSEST(fi->interval.denominator, fi->interval.numerator) + : UINT_MAX; + + fmt = v4l2_subdev_state_get_format(sd_state, 0); + mode = thp7312_find_mode(fmt->width, fmt->height, false); + rate = thp7312_find_rate(mode, fps, true); + + interval = v4l2_subdev_state_get_interval(sd_state, 0); + interval->numerator = 1; + interval->denominator = rate->fps; + + if (fi->which == V4L2_SUBDEV_FORMAT_ACTIVE) + thp7312->link_freq = rate->link_freq; + + fi->interval = *interval; + + return 0; +} + +static int thp7312_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct thp7312_device *thp7312 = to_thp7312_dev(sd); + struct v4l2_subdev_state *sd_state; + int ret; + + sd_state = v4l2_subdev_lock_and_get_active_state(sd); + + if (!enable) { + thp7312_stream_enable(thp7312, false); + + pm_runtime_mark_last_busy(thp7312->dev); + pm_runtime_put_autosuspend(thp7312->dev); + + v4l2_subdev_unlock_state(sd_state); + + return 0; + } + + ret = pm_runtime_resume_and_get(thp7312->dev); + if (ret) + goto finish_unlock; + + ret = thp7312_init_mode(thp7312, sd_state); + if (ret) + goto finish_pm; + + if (!thp7312->ctrls_applied) { + ret = __v4l2_ctrl_handler_setup(&thp7312->ctrl_handler); + if (ret) + goto finish_pm; + + thp7312->ctrls_applied = true; + } + + ret = thp7312_stream_enable(thp7312, true); + if (ret) + goto finish_pm; + + goto finish_unlock; + +finish_pm: + pm_runtime_mark_last_busy(thp7312->dev); + pm_runtime_put_autosuspend(thp7312->dev); +finish_unlock: + v4l2_subdev_unlock_state(sd_state); + + return ret; +} + +static int thp7312_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state) +{ + const struct thp7312_mode_info *default_mode = &thp7312_mode_info_data[0]; + struct v4l2_mbus_framefmt *fmt; + struct v4l2_fract *interval; + + fmt = v4l2_subdev_state_get_format(sd_state, 0); + interval = v4l2_subdev_state_get_interval(sd_state, 0); + + /* + * default init sequence initialize thp7312 to + * YUV422 YUYV VGA@30fps + */ + fmt->code = MEDIA_BUS_FMT_YUYV8_1X16; + fmt->colorspace = V4L2_COLORSPACE_SRGB; + fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace); + fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; + fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace); + fmt->width = default_mode->width; + fmt->height = default_mode->height; + fmt->field = V4L2_FIELD_NONE; + + interval->numerator = 1; + interval->denominator = default_mode->rates[0].fps; + + return 0; +} + +static const struct v4l2_subdev_core_ops thp7312_core_ops = { + .log_status = v4l2_ctrl_subdev_log_status, + .subscribe_event = v4l2_ctrl_subdev_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_video_ops thp7312_video_ops = { + .s_stream = thp7312_s_stream, +}; + +static const struct v4l2_subdev_pad_ops thp7312_pad_ops = { + .enum_mbus_code = thp7312_enum_mbus_code, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = thp7312_set_fmt, + .get_frame_interval = v4l2_subdev_get_frame_interval, + .set_frame_interval = thp7312_set_frame_interval, + .enum_frame_size = thp7312_enum_frame_size, + .enum_frame_interval = thp7312_enum_frame_interval, +}; + +static const struct v4l2_subdev_ops thp7312_subdev_ops = { + .core = &thp7312_core_ops, + .video = &thp7312_video_ops, + .pad = &thp7312_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops thp7312_internal_ops = { + .init_state = thp7312_init_state, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 Control Operations + */ + +static inline struct thp7312_device *to_thp7312_from_ctrl(struct v4l2_ctrl *ctrl) +{ + return container_of(ctrl->handler, struct thp7312_device, ctrl_handler); +} + +/* 0: 3000cm, 18: 8cm */ +static const u16 thp7312_focus_values[] = { + 3000, 1000, 600, 450, 350, + 290, 240, 200, 170, 150, + 140, 130, 120, 110, 100, + 93, 87, 83, 80, +}; + +static int thp7312_set_focus(struct thp7312_device *thp7312) +{ + enum thp7312_focus_state new_state = thp7312->focus_state; + bool continuous; + u8 af_control; + u8 af_setting; + int ret = 0; + + /* Start by programming the manual focus position if it has changed. */ + if (thp7312->focus_absolute->is_new) { + unsigned int value; + + value = thp7312_focus_values[thp7312->focus_absolute->val]; + + ret = cci_write(thp7312->regmap, + THP7312_REG_MANUAL_FOCUS_POSITION, value, NULL); + if (ret) + return ret; + } + + /* Calculate the new focus state. */ + switch (thp7312->focus_state) { + case THP7312_FOCUS_STATE_MANUAL: + default: + if (thp7312->focus_auto->val) + new_state = THP7312_FOCUS_STATE_AUTO; + else if (thp7312->focus_start->is_new) + new_state = THP7312_FOCUS_STATE_ONESHOT; + break; + + case THP7312_FOCUS_STATE_AUTO: + if (!thp7312->focus_auto->val) + new_state = THP7312_FOCUS_STATE_LOCKED; + break; + + case THP7312_FOCUS_STATE_LOCKED: + if (thp7312->focus_auto->val) + new_state = THP7312_FOCUS_STATE_AUTO; + else if (thp7312->focus_start->is_new) + new_state = THP7312_FOCUS_STATE_ONESHOT; + else if (thp7312->focus_absolute->is_new) + new_state = THP7312_FOCUS_STATE_MANUAL; + break; + + case THP7312_FOCUS_STATE_ONESHOT: + if (thp7312->focus_auto->val) + new_state = THP7312_FOCUS_STATE_AUTO; + else if (thp7312->focus_start->is_new) + new_state = THP7312_FOCUS_STATE_ONESHOT; + else if (thp7312->focus_absolute->is_new) + new_state = THP7312_FOCUS_STATE_MANUAL; + break; + } + + /* + * If neither the state nor the focus method has changed, and no new + * one-shot focus is requested, there's nothing new to program to the + * hardware. + */ + if (thp7312->focus_state == new_state && + !thp7312->focus_method->is_new && !thp7312->focus_start->is_new) + return 0; + + continuous = new_state == THP7312_FOCUS_STATE_MANUAL || + new_state == THP7312_FOCUS_STATE_ONESHOT; + + switch (thp7312->focus_method->val) { + case THP7312_FOCUS_METHOD_CONTRAST: + default: + af_setting = continuous + ? THP7312_REG_AF_SETTING_CONTINUOUS_CONTRAST + : THP7312_REG_AF_SETTING_ONESHOT_CONTRAST; + break; + case THP7312_FOCUS_METHOD_PDAF: + af_setting = continuous + ? THP7312_REG_AF_SETTING_CONTINUOUS_PDAF + : THP7312_REG_AF_SETTING_ONESHOT_PDAF; + break; + case THP7312_FOCUS_METHOD_HYBRID: + af_setting = continuous + ? THP7312_REG_AF_SETTING_CONTINUOUS_HYBRID + : THP7312_REG_AF_SETTING_ONESHOT_HYBRID; + break; + } + + switch (new_state) { + case THP7312_FOCUS_STATE_MANUAL: + default: + af_control = THP7312_REG_AF_CONTROL_MANUAL; + break; + case THP7312_FOCUS_STATE_AUTO: + case THP7312_FOCUS_STATE_ONESHOT: + af_control = THP7312_REG_AF_CONTROL_AF; + break; + case THP7312_FOCUS_STATE_LOCKED: + af_control = THP7312_REG_AF_CONTROL_LOCK; + break; + } + + cci_write(thp7312->regmap, THP7312_REG_AF_SETTING, af_setting, &ret); + + if (new_state == THP7312_FOCUS_STATE_MANUAL && + (thp7312->focus_state == THP7312_FOCUS_STATE_AUTO || + thp7312->focus_state == THP7312_FOCUS_STATE_ONESHOT)) { + /* When switching to manual state, lock AF first. */ + cci_write(thp7312->regmap, THP7312_REG_AF_CONTROL, + THP7312_REG_AF_CONTROL_LOCK, &ret); + } + + cci_write(thp7312->regmap, THP7312_REG_AF_CONTROL, af_control, &ret); + + if (ret) + return ret; + + thp7312->focus_state = new_state; + + return 0; +} + +static int thp7312_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct thp7312_device *thp7312 = to_thp7312_from_ctrl(ctrl); + int ret = 0; + u8 value; + + if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) + return -EINVAL; + + if (!pm_runtime_get_if_active(thp7312->dev, true)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + cci_write(thp7312->regmap, THP7312_REG_BRIGHTNESS, + ctrl->val + 10, &ret); + break; + + case V4L2_CID_THP7312_LOW_LIGHT_COMPENSATION: + /* 0 = Auto adjust frame rate, 1 = Fix frame rate */ + cci_write(thp7312->regmap, THP7312_REG_AE_FIX_FRAME_RATE, + ctrl->val ? 0 : 1, &ret); + break; + + case V4L2_CID_FOCUS_AUTO: + case V4L2_CID_FOCUS_ABSOLUTE: + case V4L2_CID_AUTO_FOCUS_START: + case V4L2_CID_THP7312_AUTO_FOCUS_METHOD: + ret = thp7312_set_focus(thp7312); + break; + + case V4L2_CID_HFLIP: + case V4L2_CID_VFLIP: + value = (thp7312->hflip->val ? THP7312_REG_FLIP_MIRROR_MIRROR : 0) + | (thp7312->vflip->val ? THP7312_REG_FLIP_MIRROR_FLIP : 0); + + cci_write(thp7312->regmap, THP7312_REG_FLIP_MIRROR, value, &ret); + break; + + case V4L2_CID_THP7312_NOISE_REDUCTION_AUTO: + case V4L2_CID_THP7312_NOISE_REDUCTION_ABSOLUTE: + value = thp7312->noise_reduction_auto->val ? 0 + : THP7312_REG_NOISE_REDUCTION_FIXED | + thp7312->noise_reduction_absolute->val; + + cci_write(thp7312->regmap, THP7312_REG_NOISE_REDUCTION, value, + &ret); + break; + + case V4L2_CID_AUTO_WHITE_BALANCE: + value = ctrl->val ? THP7312_WB_MODE_AUTO : THP7312_WB_MODE_MANUAL; + + cci_write(thp7312->regmap, THP7312_REG_WB_MODE, value, &ret); + break; + + case V4L2_CID_RED_BALANCE: + cci_write(thp7312->regmap, THP7312_REG_MANUAL_WB_RED_GAIN, + ctrl->val, &ret); + break; + + case V4L2_CID_BLUE_BALANCE: + cci_write(thp7312->regmap, THP7312_REG_MANUAL_WB_BLUE_GAIN, + ctrl->val, &ret); + break; + + case V4L2_CID_AUTO_EXPOSURE_BIAS: + cci_write(thp7312->regmap, THP7312_REG_AE_EXPOSURE_COMPENSATION, + ctrl->val, &ret); + break; + + case V4L2_CID_POWER_LINE_FREQUENCY: + if (ctrl->val == V4L2_CID_POWER_LINE_FREQUENCY_60HZ) { + value = THP7312_AE_FLICKER_MODE_60; + } else if (ctrl->val == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) { + value = THP7312_AE_FLICKER_MODE_50; + } else { + if (thp7312->fw_version == THP7312_FW_VERSION(40, 3)) { + /* THP7312_AE_FLICKER_MODE_DISABLE is not supported */ + value = THP7312_AE_FLICKER_MODE_50; + } else { + value = THP7312_AE_FLICKER_MODE_DISABLE; + } + } + + cci_write(thp7312->regmap, THP7312_REG_AE_FLICKER_MODE, + value, &ret); + break; + + case V4L2_CID_SATURATION: + cci_write(thp7312->regmap, THP7312_REG_SATURATION, + ctrl->val, &ret); + break; + + case V4L2_CID_CONTRAST: + cci_write(thp7312->regmap, THP7312_REG_CONTRAST, + ctrl->val, &ret); + break; + + case V4L2_CID_SHARPNESS: + cci_write(thp7312->regmap, THP7312_REG_SHARPNESS, + ctrl->val, &ret); + break; + + default: + break; + } + + pm_runtime_mark_last_busy(thp7312->dev); + pm_runtime_put_autosuspend(thp7312->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops thp7312_ctrl_ops = { + .s_ctrl = thp7312_s_ctrl, +}; + +/* + * Refer to Documentation/userspace-api/media/drivers/thp7312.rst for details. + */ +static const struct v4l2_ctrl_config thp7312_ctrl_focus_method_cdaf = { + .ops = &thp7312_ctrl_ops, + .id = V4L2_CID_THP7312_AUTO_FOCUS_METHOD, + .name = "Auto-Focus Method", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = THP7312_FOCUS_METHOD_CONTRAST, + .def = THP7312_FOCUS_METHOD_CONTRAST, + .max = THP7312_FOCUS_METHOD_CONTRAST, + .step = 1, +}; + +static const struct v4l2_ctrl_config thp7312_ctrl_focus_method_pdaf = { + .ops = &thp7312_ctrl_ops, + .id = V4L2_CID_THP7312_AUTO_FOCUS_METHOD, + .name = "Auto-Focus Method", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = THP7312_FOCUS_METHOD_CONTRAST, + .def = THP7312_FOCUS_METHOD_HYBRID, + .max = THP7312_FOCUS_METHOD_HYBRID, + .step = 1, +}; + +static const struct v4l2_ctrl_config thp7312_v4l2_ctrls_custom[] = { + { + .ops = &thp7312_ctrl_ops, + .id = V4L2_CID_THP7312_LOW_LIGHT_COMPENSATION, + .name = "Low Light Compensation", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = 0, + .def = 1, + .max = 1, + .step = 1, + }, { + .ops = &thp7312_ctrl_ops, + .id = V4L2_CID_THP7312_NOISE_REDUCTION_AUTO, + .name = "Noise Reduction Auto", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = 0, + .def = 1, + .max = 1, + .step = 1, + }, { + .ops = &thp7312_ctrl_ops, + .id = V4L2_CID_THP7312_NOISE_REDUCTION_ABSOLUTE, + .name = "Noise Reduction Level", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = 0, + .def = 0, + .max = 10, + .step = 1, + }, +}; + +static const s64 exp_bias_qmenu[] = { + -2000, -1667, -1333, -1000, -667, -333, 0, 333, 667, 1000, 1333, 1667, 2000 +}; + +static int thp7312_init_controls(struct thp7312_device *thp7312) +{ + struct v4l2_ctrl_handler *hdl = &thp7312->ctrl_handler; + struct device *dev = thp7312->dev; + struct v4l2_fwnode_device_properties props; + struct v4l2_ctrl *link_freq; + unsigned int num_controls; + unsigned int i; + u8 af_support; + int ret; + + /* + * Check what auto-focus methods the connected sensor supports, if any. + * Firmwares before v90.03 didn't expose the AF_SUPPORT register, + * consider both CDAF and PDAF as supported in that case. + */ + if (thp7312->fw_version >= THP7312_FW_VERSION(90, 3)) { + u64 val; + + ret = cci_read(thp7312->regmap, THP7312_REG_AF_SUPPORT, &val, + NULL); + if (ret) + return ret; + + af_support = val & (THP7312_AF_SUPPORT_PDAF | + THP7312_AF_SUPPORT_CONTRAST); + } else { + af_support = THP7312_AF_SUPPORT_PDAF + | THP7312_AF_SUPPORT_CONTRAST; + } + + num_controls = 14 + ARRAY_SIZE(thp7312_v4l2_ctrls_custom) + + (af_support ? 4 : 0); + + v4l2_ctrl_handler_init(hdl, num_controls); + + if (af_support) { + const struct v4l2_ctrl_config *af_method; + + af_method = af_support & THP7312_AF_SUPPORT_PDAF + ? &thp7312_ctrl_focus_method_pdaf + : &thp7312_ctrl_focus_method_cdaf; + + thp7312->focus_state = THP7312_FOCUS_STATE_MANUAL; + + thp7312->focus_auto = + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, + V4L2_CID_FOCUS_AUTO, + 0, 1, 1, 1); + thp7312->focus_absolute = + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, + V4L2_CID_FOCUS_ABSOLUTE, + 0, ARRAY_SIZE(thp7312_focus_values), + 1, 0); + thp7312->focus_method = + v4l2_ctrl_new_custom(hdl, af_method, NULL); + thp7312->focus_start = + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, + V4L2_CID_AUTO_FOCUS_START, + 1, 1, 1, 1); + + v4l2_ctrl_cluster(4, &thp7312->focus_auto); + } + + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE, + 0, 1, 1, 1); + /* 32: 1x, 255: 7.95x */ + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_RED_BALANCE, + 32, 255, 1, 64); + /* 32: 1x, 255: 7.95x */ + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_BLUE_BALANCE, + 32, 255, 1, 50); + + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_BRIGHTNESS, + -10, 10, 1, 0); + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_SATURATION, + 0, 31, 1, 10); + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_CONTRAST, + 0, 20, 1, 10); + v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, V4L2_CID_SHARPNESS, + 0, 31, 1, 8); + + thp7312->hflip = v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + thp7312->vflip = v4l2_ctrl_new_std(hdl, &thp7312_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + + v4l2_ctrl_cluster(2, &thp7312->hflip); + + v4l2_ctrl_new_int_menu(hdl, &thp7312_ctrl_ops, + V4L2_CID_AUTO_EXPOSURE_BIAS, + ARRAY_SIZE(exp_bias_qmenu) - 1, + ARRAY_SIZE(exp_bias_qmenu) / 2, exp_bias_qmenu); + + v4l2_ctrl_new_std_menu(hdl, &thp7312_ctrl_ops, + V4L2_CID_POWER_LINE_FREQUENCY, + V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, + V4L2_CID_POWER_LINE_FREQUENCY_50HZ); + + thp7312->link_freq = thp7312_mode_info_data[0].rates[0].link_freq; + + link_freq = v4l2_ctrl_new_int_menu(hdl, &thp7312_ctrl_ops, + V4L2_CID_LINK_FREQ, 0, 0, + &thp7312->link_freq); + + /* Set properties from fwnode (e.g. rotation, orientation). */ + ret = v4l2_fwnode_device_parse(dev, &props); + if (ret) { + dev_err(dev, "Failed to parse fwnode: %d\n", ret); + goto error; + } + + ret = v4l2_ctrl_new_fwnode_properties(hdl, &thp7312_ctrl_ops, &props); + if (ret) { + dev_err(dev, "Failed to create new v4l2 ctrl for fwnode properties: %d\n", ret); + goto error; + } + + for (i = 0; i < ARRAY_SIZE(thp7312_v4l2_ctrls_custom); i++) { + const struct v4l2_ctrl_config *ctrl_cfg = + &thp7312_v4l2_ctrls_custom[i]; + struct v4l2_ctrl *ctrl; + + ctrl = v4l2_ctrl_new_custom(hdl, ctrl_cfg, NULL); + + if (ctrl_cfg->id == V4L2_CID_THP7312_NOISE_REDUCTION_AUTO) + thp7312->noise_reduction_auto = ctrl; + else if (ctrl_cfg->id == V4L2_CID_THP7312_NOISE_REDUCTION_ABSOLUTE) + thp7312->noise_reduction_absolute = ctrl; + } + + v4l2_ctrl_cluster(2, &thp7312->noise_reduction_auto); + + if (hdl->error) { + dev_err(dev, "v4l2_ctrl_handler error\n"); + ret = hdl->error; + goto error; + } + + link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + return ret; + +error: + v4l2_ctrl_handler_free(hdl); + return ret; +} + +/* ----------------------------------------------------------------------------- + * Firmware Update + */ + +/* + * The firmware data is made of 128kB of RAM firmware, followed by a + * variable-size "header". Both are stored in flash memory. + */ +#define THP7312_FW_RAM_SIZE (128 * 1024) +#define THP7312_FW_MIN_SIZE (THP7312_FW_RAM_SIZE + 4) +#define THP7312_FW_MAX_SIZE (THP7312_FW_RAM_SIZE + 64 * 1024) + +/* + * Data is first uploaded to the THP7312 128kB SRAM, and then written to flash. + * The SRAM is exposed over I2C as 32kB banks, and up to 4kB of data can be + * transferred in a single I2C write. + */ +#define THP7312_RAM_BANK_SIZE (32 * 1024) +#define THP7312_FW_DOWNLOAD_UNIT (4 * 1024) + +#define THP7312_FLASH_MEMORY_ERASE_TIMEOUT 40 + +#define THP7312_FLASH_MAX_REG_READ_SIZE 10 +#define THP7312_FLASH_MAX_REG_DATA_SIZE 10 + +static const u8 thp7312_cmd_config_flash_mem_if[] = { + 0xd5, 0x18, 0x00, 0x00, 0x00, 0x80 +}; + +static const u8 thp7312_cmd_write_to_reg[] = { + 0xd5, 0x0c, 0x80, 0x00, 0x00, 0x00 +}; + +static const u8 thp7312_cmd_read_reg[] = { + 0xd5, 0x04 +}; + +/* + * THP7312 Write data from RAM to Flash Memory + * Command ID FF700F + * Format: FF700F AA AA AA BB BB BB + * AA AA AA: destination start address + * BB BB BB: (write size - 1) + * Source address always starts from 0 + */ +static const u8 thp7312_cmd_write_ram_to_flash[] = { 0xff, 0x70, 0x0f }; + +/* + * THP7312 Calculate CRC command + * Command ID: FF70 09 + * Format: FF70 09 AA AA AA BB BB BB + * AA AA AA: Start address of calculation + * BB BB BB: (calculate size - 1) + */ +static const u8 thp7312_cmd_calc_crc[] = { 0xff, 0x70, 0x09 }; + +static const u8 thp7312_jedec_rdid[] = { SPINOR_OP_RDID, 0x00, 0x00, 0x00 }; +static const u8 thp7312_jedec_rdsr[] = { SPINOR_OP_RDSR, 0x00, 0x00, 0x00 }; +static const u8 thp7312_jedec_wen[] = { SPINOR_OP_WREN }; + +static int thp7312_read_firmware_version(struct thp7312_device *thp7312) +{ + u64 val = 0; + int ret = 0; + u8 major; + u8 minor; + + cci_read(thp7312->regmap, THP7312_REG_FIRMWARE_VERSION_1, &val, &ret); + major = val; + + cci_read(thp7312->regmap, THP7312_REG_FIRMWARE_VERSION_2, &val, &ret); + minor = val; + + thp7312->fw_version = THP7312_FW_VERSION(major, minor); + return ret; +} + +static int thp7312_write_buf(struct thp7312_device *thp7312, + const u8 *write_buf, u16 write_size) +{ + struct i2c_client *client = to_i2c_client(thp7312->dev); + int ret; + + ret = i2c_master_send(client, write_buf, write_size); + return ret >= 0 ? 0 : ret; +} + +static int __thp7312_flash_reg_write(struct thp7312_device *thp7312, + const u8 *write_buf, u16 write_size) +{ + struct device *dev = thp7312->dev; + u8 temp_write_buf[THP7312_FLASH_MAX_REG_DATA_SIZE + 2]; + int ret; + + if (write_size > THP7312_FLASH_MAX_REG_DATA_SIZE) { + dev_err(dev, "%s: Write size error size = %d\n", + __func__, write_size); + return -EINVAL; + } + + ret = thp7312_write_buf(thp7312, thp7312_cmd_config_flash_mem_if, + sizeof(thp7312_cmd_config_flash_mem_if)); + if (ret < 0) { + dev_err(dev, "%s: Failed to config flash memory IF: %d\n", + __func__, ret); + return ret; + } + + temp_write_buf[0] = 0xd5; + temp_write_buf[1] = 0x00; + memcpy((temp_write_buf + 2), write_buf, write_size); + ret = thp7312_write_buf(thp7312, temp_write_buf, write_size + 2); + if (ret < 0) + return ret; + + thp7312_write_buf(thp7312, thp7312_cmd_write_to_reg, + sizeof(thp7312_cmd_write_to_reg)); + + return 0; +} + +static int __thp7312_flash_reg_read(struct thp7312_device *thp7312, + const u8 *write_buf, u16 write_size, + u8 *read_buf, u16 read_size) +{ + struct i2c_client *client = to_i2c_client(thp7312->dev); + struct i2c_msg msgs[2]; + int ret; + + ret = __thp7312_flash_reg_write(thp7312, write_buf, write_size); + if (ret) + return ret; + + msgs[0].addr = client->addr; + msgs[0].flags = 0; + msgs[0].len = sizeof(thp7312_cmd_read_reg), + msgs[0].buf = (u8 *)thp7312_cmd_read_reg; + + msgs[1].addr = client->addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = read_size; + msgs[1].buf = read_buf; + + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + return ret >= 0 ? 0 : ret; +} + +#define thp7312_flash_reg_write(thp7312, wrbuf) \ + __thp7312_flash_reg_write(thp7312, wrbuf, sizeof(wrbuf)) + +#define thp7312_flash_reg_read(thp7312, wrbuf, rdbuf) \ + __thp7312_flash_reg_read(thp7312, wrbuf, sizeof(wrbuf), \ + rdbuf, sizeof(rdbuf)) + +static enum fw_upload_err thp7312_fw_prepare_config(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + int ret; + + ret = cci_write(thp7312->regmap, THP7312_REG_FW_MEMORY_IO_SETTING, + THP7312_FW_MEMORY_IO_GPIO0, NULL); + if (ret) { + dev_err(dev, "Failed to set flash memory I/O\n"); + return FW_UPLOAD_ERR_HW_ERROR; + } + + /* Set max drivability. */ + ret = cci_write(thp7312->regmap, THP7312_REG_FW_DRIVABILITY, 0x00777777, + NULL); + if (ret) { + dev_err(dev, "Failed to set drivability: %d\n", ret); + return FW_UPLOAD_ERR_HW_ERROR; + } + + return FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err thp7312_fw_prepare_check(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + u8 read_buf[3] = { 0 }; + int ret; + + /* Get JEDEC ID */ + ret = thp7312_flash_reg_read(thp7312, thp7312_jedec_rdid, read_buf); + if (ret) { + dev_err(dev, "Failed to get JEDEC ID: %d\n", ret); + return FW_UPLOAD_ERR_HW_ERROR; + } + + dev_dbg(dev, "Flash Memory: JEDEC ID = 0x%x 0x%x 0x%x\n", + read_buf[0], read_buf[1], read_buf[2]); + + return FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err thp7312_fw_prepare_reset(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + int ret; + + ret = cci_write(thp7312->regmap, THP7312_REG_FW_RESET_FLASH, 0x81, NULL); + if (ret) { + dev_err(dev, "Failed to reset flash memory: %d\n", ret); + return FW_UPLOAD_ERR_HW_ERROR; + } + + return FW_UPLOAD_ERR_NONE; +} + +/* TODO: Erase only the amount of blocks necessary */ +static enum fw_upload_err thp7312_flash_erase(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + u8 read_buf[1] = { 0 }; + unsigned int i; + u8 block; + int ret; + + for (block = 0; block < 3; block++) { + const u8 jedec_se[] = { SPINOR_OP_SE, block, 0x00, 0x00 }; + + ret = thp7312_flash_reg_write(thp7312, thp7312_jedec_wen); + if (ret < 0) { + dev_err(dev, "Failed to enable flash for writing\n"); + return FW_UPLOAD_ERR_RW_ERROR; + } + + ret = thp7312_flash_reg_write(thp7312, jedec_se); + if (ret < 0) { + dev_err(dev, "Failed to erase flash sector\n"); + return FW_UPLOAD_ERR_RW_ERROR; + } + + for (i = 0; i < THP7312_FLASH_MEMORY_ERASE_TIMEOUT; i++) { + usleep_range(100000, 101000); + thp7312_flash_reg_read(thp7312, thp7312_jedec_rdsr, + read_buf); + + /* Check Busy bit. Busy == 0x0 means erase complete. */ + if (!(read_buf[0] & SR_WIP)) + break; + } + + if (i == THP7312_FLASH_MEMORY_ERASE_TIMEOUT) + return FW_UPLOAD_ERR_TIMEOUT; + } + + thp7312_flash_reg_read(thp7312, thp7312_jedec_rdsr, read_buf); + + /* Check WEL bit. */ + if (read_buf[0] & SR_WEL) + return FW_UPLOAD_ERR_HW_ERROR; + + return FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err +thp7312_write_download_data_by_unit(struct thp7312_device *thp7312, + unsigned int addr, const u8 *data, + unsigned int size) +{ + struct device *dev = thp7312->dev; + u8 *write_buf = thp7312->fw_write_buf; + int ret; + + dev_dbg(dev, "%s: addr = 0x%04x, data = 0x%p, size = %u\n", + __func__, addr, data, size); + + write_buf[0] = (addr >> 8) & 0xff; + write_buf[1] = (addr >> 0) & 0xff; + memcpy(&write_buf[2], data, size); + + /* + * THP7312 Firmware download to RAM + * Command ID (address to download): 0x0000 - 0x7fff + * Format:: 0000 XX XX XX ........ XX + */ + ret = thp7312_write_buf(thp7312, write_buf, size + 2); + if (ret < 0) + dev_err(dev, "Unit transfer ERROR %s(): ret = %d\n", __func__, ret); + + return ret >= 0 ? FW_UPLOAD_ERR_NONE : FW_UPLOAD_ERR_RW_ERROR; +} + +static enum fw_upload_err thp7312_fw_load_to_ram(struct thp7312_device *thp7312, + const u8 *data, u32 size) +{ + struct device *dev = thp7312->dev; + enum fw_upload_err ret; + unsigned int num_banks; + unsigned int i, j; + + num_banks = DIV_ROUND_UP(size, THP7312_RAM_BANK_SIZE); + + dev_dbg(dev, "%s: loading %u bytes in SRAM (%u banks)\n", __func__, + size, num_banks); + + for (i = 0; i < num_banks; i++) { + const u32 bank_addr = 0x10000000 | (i * THP7312_RAM_BANK_SIZE); + unsigned int bank_size; + unsigned int num_chunks; + + ret = cci_write(thp7312->regmap, THP7312_REG_FW_DEST_BANK_ADDR, + bank_addr, NULL); + if (ret) + return FW_UPLOAD_ERR_HW_ERROR; + + bank_size = min_t(u32, size, THP7312_RAM_BANK_SIZE); + num_chunks = DIV_ROUND_UP(bank_size, THP7312_FW_DOWNLOAD_UNIT); + + dev_dbg(dev, "%s: loading %u bytes in SRAM bank %u (%u chunks)\n", + __func__, bank_size, i, num_chunks); + + for (j = 0 ; j < num_chunks; j++) { + unsigned int chunk_addr; + unsigned int chunk_size; + + chunk_addr = j * THP7312_FW_DOWNLOAD_UNIT; + chunk_size = min_t(u32, size, THP7312_FW_DOWNLOAD_UNIT); + + ret = thp7312_write_download_data_by_unit(thp7312, chunk_addr, + data, chunk_size); + if (ret != FW_UPLOAD_ERR_NONE) { + dev_err(dev, "Unit transfer ERROR at bank transfer %s(): %d\n", + __func__, j); + return ret; + } + + data += chunk_size; + size -= chunk_size; + } + } + + return FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err thp7312_fw_write_to_flash(struct thp7312_device *thp7312, + u32 dest, u32 write_size) +{ + u8 command[sizeof(thp7312_cmd_write_ram_to_flash) + 6]; + static const u32 cmd_size = sizeof(thp7312_cmd_write_ram_to_flash); + u64 val; + int ret; + + memcpy(command, thp7312_cmd_write_ram_to_flash, cmd_size); + + command[cmd_size] = (dest & 0xff0000) >> 16; + command[cmd_size + 1] = (dest & 0x00ff00) >> 8; + command[cmd_size + 2] = (dest & 0x0000ff); + command[cmd_size + 3] = ((write_size - 1) & 0xff0000) >> 16; + command[cmd_size + 4] = ((write_size - 1) & 0x00ff00) >> 8; + command[cmd_size + 5] = ((write_size - 1) & 0x0000ff); + + ret = thp7312_write_buf(thp7312, command, sizeof(command)); + if (ret < 0) + return FW_UPLOAD_ERR_RW_ERROR; + + usleep_range(8000000, 8100000); + + ret = cci_read(thp7312->regmap, THP7312_REG_FW_VERIFY_RESULT, &val, + NULL); + if (ret < 0) + return FW_UPLOAD_ERR_RW_ERROR; + + return val ? FW_UPLOAD_ERR_HW_ERROR : FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err thp7312_fw_check_crc(struct thp7312_device *thp7312, + const u8 *fw_data, u32 fw_size) +{ + struct device *dev = thp7312->dev; + u16 header_size = fw_size - THP7312_FW_RAM_SIZE; + u8 command[sizeof(thp7312_cmd_calc_crc) + 6]; + static const u32 cmd_size = sizeof(thp7312_cmd_calc_crc); + u32 size = THP7312_FW_RAM_SIZE - 4; + u32 fw_crc; + u64 crc; + int ret; + + memcpy(command, thp7312_cmd_calc_crc, cmd_size); + + command[cmd_size] = 0; + command[cmd_size + 1] = (header_size >> 8) & 0xff; + command[cmd_size + 2] = header_size & 0xff; + + command[cmd_size + 3] = (size >> 16) & 0xff; + command[cmd_size + 4] = (size >> 8) & 0xff; + command[cmd_size + 5] = size & 0xff; + + ret = thp7312_write_buf(thp7312, command, sizeof(command)); + if (ret < 0) + return FW_UPLOAD_ERR_RW_ERROR; + + usleep_range(2000000, 2100000); + + fw_crc = get_unaligned_be32(&fw_data[fw_size - 4]); + + ret = cci_read(thp7312->regmap, THP7312_REG_FW_CRC_RESULT, &crc, NULL); + if (ret < 0) + return FW_UPLOAD_ERR_RW_ERROR; + + if (fw_crc != crc) { + dev_err(dev, "CRC mismatch: firmware 0x%08x, flash 0x%08llx\n", + fw_crc, crc); + return FW_UPLOAD_ERR_HW_ERROR; + } + + return FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err thp7312_fw_prepare(struct fw_upload *fw_upload, + const u8 *data, u32 size) +{ + struct thp7312_device *thp7312 = fw_upload->dd_handle; + struct device *dev = thp7312->dev; + enum fw_upload_err ret; + + mutex_lock(&thp7312->fw_lock); + thp7312->fw_cancel = false; + mutex_unlock(&thp7312->fw_lock); + + if (size < THP7312_FW_MIN_SIZE || size > THP7312_FW_MAX_SIZE) { + dev_err(dev, "%s: Invalid firmware size %d; must be between %d and %d\n", + __func__, size, THP7312_FW_MIN_SIZE, THP7312_FW_MAX_SIZE); + return FW_UPLOAD_ERR_INVALID_SIZE; + } + + ret = thp7312_fw_prepare_config(thp7312); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_prepare_check(thp7312); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_prepare_reset(thp7312); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + mutex_lock(&thp7312->fw_lock); + ret = thp7312->fw_cancel ? FW_UPLOAD_ERR_CANCELED : FW_UPLOAD_ERR_NONE; + mutex_unlock(&thp7312->fw_lock); + + return ret; +} + +static enum fw_upload_err thp7312_fw_write(struct fw_upload *fw_upload, + const u8 *data, u32 offset, + u32 size, u32 *written) +{ + struct thp7312_device *thp7312 = fw_upload->dd_handle; + struct device *dev = thp7312->dev; + u16 header_size = size - THP7312_FW_RAM_SIZE; + enum fw_upload_err ret; + bool cancel; + + mutex_lock(&thp7312->fw_lock); + cancel = thp7312->fw_cancel; + mutex_unlock(&thp7312->fw_lock); + + if (cancel) + return FW_UPLOAD_ERR_CANCELED; + + ret = thp7312_flash_erase(thp7312); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_load_to_ram(thp7312, data, THP7312_FW_RAM_SIZE); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_write_to_flash(thp7312, 0, 0x1ffff); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_load_to_ram(thp7312, data + THP7312_FW_RAM_SIZE, header_size); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_write_to_flash(thp7312, 0x20000, header_size - 1); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + ret = thp7312_fw_check_crc(thp7312, data, size); + if (ret != FW_UPLOAD_ERR_NONE) + return ret; + + dev_info(dev, "Successfully wrote firmware\n"); + + *written = size; + return FW_UPLOAD_ERR_NONE; +} + +static enum fw_upload_err thp7312_fw_poll_complete(struct fw_upload *fw_upload) +{ + return FW_UPLOAD_ERR_NONE; +} + +/* + * This may be called asynchronously with an on-going update. All other + * functions are called sequentially in a single thread. To avoid contention on + * register accesses, only update the cancel_request flag. Other functions will + * check this flag and handle the cancel request synchronously. + */ +static void thp7312_fw_cancel(struct fw_upload *fw_upload) +{ + struct thp7312_device *thp7312 = fw_upload->dd_handle; + + mutex_lock(&thp7312->fw_lock); + thp7312->fw_cancel = true; + mutex_unlock(&thp7312->fw_lock); +} + +static const struct fw_upload_ops thp7312_fw_upload_ops = { + .prepare = thp7312_fw_prepare, + .write = thp7312_fw_write, + .poll_complete = thp7312_fw_poll_complete, + .cancel = thp7312_fw_cancel, +}; + +static int thp7312_register_flash_mode(struct thp7312_device *thp7312) +{ + struct device *dev = thp7312->dev; + struct fw_upload *fwl; + u64 val; + int ret; + + dev_info(dev, "booted in flash mode\n"); + + mutex_init(&thp7312->fw_lock); + + thp7312->fw_write_buf = devm_kzalloc(dev, THP7312_FW_DOWNLOAD_UNIT + 2, + GFP_KERNEL); + if (!thp7312->fw_write_buf) + return -ENOMEM; + + ret = __thp7312_power_on(thp7312); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to power on\n"); + + ret = cci_read(thp7312->regmap, THP7312_REG_FW_STATUS, &val, NULL); + if (ret) { + dev_err_probe(dev, ret, "Camera status read failed\n"); + goto error; + } + + fwl = firmware_upload_register(THIS_MODULE, dev, "thp7312-firmware", + &thp7312_fw_upload_ops, thp7312); + if (IS_ERR(fwl)) { + ret = PTR_ERR(fwl); + dev_err_probe(dev, ret, "Failed to register firmware upload\n"); + goto error; + } + + thp7312->fwl = fwl; + return 0; + +error: + __thp7312_power_off(thp7312); + return ret; +} + +/* ----------------------------------------------------------------------------- + * Probe & Remove + */ + +static int thp7312_get_regulators(struct thp7312_device *thp7312) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(thp7312->supplies); i++) + thp7312->supplies[i].supply = thp7312_supply_name[i]; + + return devm_regulator_bulk_get(thp7312->dev, + ARRAY_SIZE(thp7312->supplies), + thp7312->supplies); +} + +static int thp7312_sensor_parse_dt(struct thp7312_device *thp7312, + struct fwnode_handle *node) +{ + struct device *dev = thp7312->dev; + struct thp7312_sensor *sensor; + const char *model; + u8 data_lanes[4]; + u32 values[4]; + unsigned int i; + u32 reg; + int ret; + + /* Retrieve the sensor index from the reg property. */ + ret = fwnode_property_read_u32(node, "reg", ®); + if (ret < 0) { + dev_err(dev, "'reg' property missing in sensor node\n"); + return -EINVAL; + } + + if (reg >= ARRAY_SIZE(thp7312->sensors)) { + dev_err(dev, "Out-of-bounds 'reg' value %u\n", reg); + return -EINVAL; + } + + sensor = &thp7312->sensors[reg]; + if (sensor->info) { + dev_err(dev, "Duplicate entry for sensor %u\n", reg); + return -EINVAL; + } + + ret = fwnode_property_read_string(node, "thine,model", &model); + if (ret < 0) { + dev_err(dev, "'thine,model' property missing in sensor node\n"); + return -EINVAL; + } + + for (i = 0; i < ARRAY_SIZE(thp7312_sensor_info); i++) { + const struct thp7312_sensor_info *info = + &thp7312_sensor_info[i]; + + if (!strcmp(info->model, model)) { + sensor->info = info; + break; + } + } + + if (!sensor->info) { + dev_err(dev, "Unsupported sensor model %s\n", model); + return -EINVAL; + } + + ret = fwnode_property_read_u32_array(node, "data-lanes", values, + ARRAY_SIZE(values)); + if (ret < 0) { + dev_err(dev, "Failed to read property data-lanes: %d\n", ret); + return ret; + } + + for (i = 0; i < ARRAY_SIZE(data_lanes); ++i) + data_lanes[i] = values[i]; + + ret = thp7312_map_data_lanes(&sensor->lane_remap, data_lanes, + ARRAY_SIZE(data_lanes)); + if (ret) { + dev_err(dev, "Invalid sensor@%u data-lanes value\n", reg); + return ret; + } + + return 0; +} + +static int thp7312_parse_dt(struct thp7312_device *thp7312) +{ + struct v4l2_fwnode_endpoint ep = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; + struct device *dev = thp7312->dev; + struct fwnode_handle *endpoint; + struct fwnode_handle *sensors; + unsigned int num_sensors = 0; + struct fwnode_handle *node; + int ret; + + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); + if (!endpoint) + return dev_err_probe(dev, -EINVAL, "Endpoint node not found\n"); + + ret = v4l2_fwnode_endpoint_parse(endpoint, &ep); + fwnode_handle_put(endpoint); + if (ret) + return dev_err_probe(dev, ret, "Could not parse endpoint\n"); + + ret = thp7312_map_data_lanes(&thp7312->lane_remap, + ep.bus.mipi_csi2.data_lanes, + ep.bus.mipi_csi2.num_data_lanes); + if (ret) { + dev_err(dev, "Invalid data-lanes value\n"); + return ret; + } + + /* + * The thine,boot-mode property is optional and default to + * THP7312_BOOT_MODE_SPI_MASTER (1). + */ + thp7312->boot_mode = THP7312_BOOT_MODE_SPI_MASTER; + ret = device_property_read_u32(dev, "thine,boot-mode", + &thp7312->boot_mode); + if (ret && ret != -EINVAL) + return dev_err_probe(dev, ret, "Property '%s' is invalid\n", + "thine,boot-mode"); + + if (thp7312->boot_mode != THP7312_BOOT_MODE_2WIRE_SLAVE && + thp7312->boot_mode != THP7312_BOOT_MODE_SPI_MASTER) + return dev_err_probe(dev, -EINVAL, "Invalid '%s' value %u\n", + "thine,boot-mode", thp7312->boot_mode); + + /* Sensors */ + sensors = device_get_named_child_node(dev, "sensors"); + if (!sensors) { + dev_err(dev, "'sensors' child node not found\n"); + return -EINVAL; + } + + fwnode_for_each_available_child_node(sensors, node) { + if (fwnode_name_eq(node, "sensor")) { + if (!thp7312_sensor_parse_dt(thp7312, node)) + num_sensors++; + } + } + + fwnode_handle_put(sensors); + + if (!num_sensors) { + dev_err(dev, "No sensor found\n"); + return -EINVAL; + } + + return 0; +} + +static int thp7312_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct thp7312_device *thp7312; + int ret; + + thp7312 = devm_kzalloc(dev, sizeof(*thp7312), GFP_KERNEL); + if (!thp7312) + return -ENOMEM; + + thp7312->dev = dev; + + thp7312->regmap = devm_cci_regmap_init_i2c(client, 16); + if (IS_ERR(thp7312->regmap)) + return dev_err_probe(dev, PTR_ERR(thp7312->regmap), + "Unable to initialize I2C\n"); + + ret = thp7312_parse_dt(thp7312); + if (ret < 0) + return ret; + + ret = thp7312_get_regulators(thp7312); + if (ret) + return dev_err_probe(dev, ret, "Failed to get regulators\n"); + + thp7312->iclk = devm_clk_get(dev, NULL); + if (IS_ERR(thp7312->iclk)) + return dev_err_probe(dev, PTR_ERR(thp7312->iclk), + "Failed to get iclk\n"); + + thp7312->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(thp7312->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(thp7312->reset_gpio), + "Failed to get reset gpio\n"); + + if (thp7312->boot_mode == THP7312_BOOT_MODE_2WIRE_SLAVE) + return thp7312_register_flash_mode(thp7312); + + v4l2_i2c_subdev_init(&thp7312->sd, client, &thp7312_subdev_ops); + thp7312->sd.internal_ops = &thp7312_internal_ops; + thp7312->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; + thp7312->pad.flags = MEDIA_PAD_FL_SOURCE; + thp7312->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + + ret = media_entity_pads_init(&thp7312->sd.entity, 1, &thp7312->pad); + if (ret) + return ret; + + /* + * Enable power management. The driver supports runtime PM, but needs to + * work when runtime PM is disabled in the kernel. To that end, power + * the device manually here. + */ + ret = thp7312_power_on(thp7312); + if (ret) + goto err_entity_cleanup; + + ret = thp7312_read_firmware_version(thp7312); + if (ret < 0) { + dev_err(dev, "Camera is not found\n"); + goto err_power_off; + } + + ret = thp7312_init_controls(thp7312); + if (ret) { + dev_err(dev, "Failed to initialize controls\n"); + goto err_power_off; + } + + thp7312->sd.ctrl_handler = &thp7312->ctrl_handler; + thp7312->sd.state_lock = thp7312->ctrl_handler.lock; + + ret = v4l2_subdev_init_finalize(&thp7312->sd); + if (ret < 0) { + dev_err(dev, "Subdev active state initialization failed\n"); + goto err_free_ctrls; + } + + /* + * Enable runtime PM with autosuspend. As the device has been powered + * manually, mark it as active, and increase the usage count without + * resuming the device. + */ + pm_runtime_set_active(dev); + pm_runtime_get_noresume(dev); + pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + + ret = v4l2_async_register_subdev(&thp7312->sd); + if (ret < 0) { + dev_err(dev, "Subdev registration failed\n"); + goto err_pm; + } + + /* + * Decrease the PM usage count. The device will get suspended after the + * autosuspend delay, turning the power off. + */ + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + dev_info(dev, "THP7312 firmware version %02u.%02u\n", + THP7312_FW_VERSION_MAJOR(thp7312->fw_version), + THP7312_FW_VERSION_MINOR(thp7312->fw_version)); + + return 0; + +err_pm: + pm_runtime_disable(dev); + pm_runtime_put_noidle(dev); + v4l2_subdev_cleanup(&thp7312->sd); +err_free_ctrls: + v4l2_ctrl_handler_free(&thp7312->ctrl_handler); +err_power_off: + thp7312_power_off(thp7312); +err_entity_cleanup: + media_entity_cleanup(&thp7312->sd.entity); + return ret; +} + +static void thp7312_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct thp7312_device *thp7312 = to_thp7312_dev(sd); + + if (thp7312->boot_mode == THP7312_BOOT_MODE_2WIRE_SLAVE) { + firmware_upload_unregister(thp7312->fwl); + __thp7312_power_off(thp7312); + return; + } + + v4l2_async_unregister_subdev(&thp7312->sd); + v4l2_subdev_cleanup(&thp7312->sd); + media_entity_cleanup(&thp7312->sd.entity); + v4l2_ctrl_handler_free(&thp7312->ctrl_handler); + + /* + * Disable runtime PM. In case runtime PM is disabled in the kernel, + * make sure to turn power off manually. + */ + pm_runtime_disable(thp7312->dev); + if (!pm_runtime_status_suspended(thp7312->dev)) + thp7312_power_off(thp7312); + pm_runtime_set_suspended(thp7312->dev); +} + +static const struct of_device_id thp7312_dt_ids[] = { + { .compatible = "thine,thp7312" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, thp7312_dt_ids); + +static struct i2c_driver thp7312_i2c_driver = { + .driver = { + .name = "thp7312", + .pm = &thp7312_pm_ops, + .of_match_table = thp7312_dt_ids, + }, + .probe = thp7312_probe, + .remove = thp7312_remove, +}; + +module_i2c_driver(thp7312_i2c_driver); + +MODULE_DESCRIPTION("THP7312 MIPI Camera Subdev Driver"); +MODULE_LICENSE("GPL"); |