// SPDX-License-Identifier: GPL-2.0 /* * sp250a driver * * Copyright (C) 2021 Rockchip Electronics Co., Ltd. * * V0.0X01.0X00 init version * V0.0X01.0X01 * 1. adjust power on/off sequence * 2. add some debug info */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x01) #ifndef V4L2_CID_DIGITAL_GAIN #define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN #endif #define SP250A_LANES 1 #define SP250A_BITS_PER_SAMPLE 10 #define SP250A_LINK_FREQ_MHZ 420000000 /* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */ #define SP250A_PIXEL_RATE (SP250A_LINK_FREQ_MHZ * 2 * 1 / 10) #define SP250A_XVCLK_FREQ 24000000 #define CHIP_ID 0x250a #define SP250A_REG_CHIP_ID_H 0x02 #define SP250A_REG_CHIP_ID_L 0x03 #define SP250A_REG_SET_PAGE 0xfd #define SP250A_SET_PAGE_ZERO 0x00 #define SP250A_SET_PAGE_ONE 0x01 #define SP250A_REG_CTRL_MODE 0xac #define SP250A_MODE_SW_STANDBY 0x00 #define SP250A_MODE_STREAMING 0x01 #define SP250A_REG_EXPOSURE_H 0x03 #define SP250A_REG_EXPOSURE_L 0x04 #define SP250A_FETCH_HIGH_BYTE_EXP(VAL) (((VAL) >> 8) & 0xFF) /* 8 Bits */ #define SP250A_FETCH_LOW_BYTE_EXP(VAL) ((VAL) & 0xFF) /* 8 Bits */ #define SP250A_EXPOSURE_MIN 4 #define SP250A_EXPOSURE_STEP 1 #define SP250A_VTS_MAX 0x1fff #define SP250A_REG_AGAIN 0x24 #define SP250A_GAIN_MIN 0x10 #define SP250A_GAIN_MAX 0xff #define SP250A_GAIN_STEP 1 #define SP250A_GAIN_DEFAULT 0x20 #define SP250A_REG_VTS_H 0x05 #define SP250A_REG_VTS_L 0x06 #define REG_NULL 0xFF #define OF_CAMERA_PINCTRL_STATE_DEFAULT "rockchip,camera_default" #define OF_CAMERA_PINCTRL_STATE_SLEEP "rockchip,camera_sleep" #define SP250A_NAME "sp250a" #define SP250A_MEDIA_BUS_FMT MEDIA_BUS_FMT_SBGGR10_1X10 static const char * const sp250a_supply_names[] = { "avdd", /* Analog power */ "dovdd", /* Digital I/O power */ "dvdd", /* Digital core power */ }; #define SP250A_NUM_SUPPLIES ARRAY_SIZE(sp250a_supply_names) struct regval { u8 addr; u8 val; }; struct sp250a_mode { u32 width; u32 height; struct v4l2_fract max_fps; u32 hts_def; u32 vts_def; u32 exp_def; const struct regval *reg_list; }; struct sp250a { struct i2c_client *client; struct clk *xvclk; struct gpio_desc *reset_gpio; struct gpio_desc *pwdn_gpio; struct regulator_bulk_data supplies[SP250A_NUM_SUPPLIES]; struct pinctrl *pinctrl; struct pinctrl_state *pins_default; struct pinctrl_state *pins_sleep; struct v4l2_subdev subdev; struct media_pad pad; struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *exposure; struct v4l2_ctrl *anal_gain; struct v4l2_ctrl *digi_gain; struct v4l2_ctrl *hblank; struct v4l2_ctrl *vblank; struct mutex mutex; bool streaming; bool power_on; const struct sp250a_mode *cur_mode; u32 module_index; const char *module_facing; const char *module_name; const char *len_name; }; #define to_sp250a(sd) container_of(sd, struct sp250a, subdev) /* * Xclk 24Mhz */ static const struct regval sp250a_global_regs[] = { {0xfd, 0x01}, //{0x03, 0x01}, //1base //{0x04, 0x73}, {0x24, 0xff}, {0x01, 0x01}, {0x11, 0x30}, //rst_num1 {0x33, 0x50}, //rst_num2 {0x1c, 0x0c}, //[0]double shutter disable {0x1e, 0x80}, //rcn_dds_8lsb {0x29, 0x80}, //scnt_dds_8lsb {0x2a, 0xda}, //adc range 835mv,rgcol 1.5v,rgcnt 0.9v //ea {0x2c, 0x60}, //high 8bit, pldo 2.57v {0x21, 0x26}, //pcp rst 3.3v, pcp tx 3.9v {0x25, 0x13}, //[4]bl_en, ipix 1.336uA {0x27, 0x01}, //two dds mode enable {0x55, 0x10}, {0x66, 0x36}, {0x68, 0x28}, {0x72, 0x50}, {0x58, 0x2a}, {0x75, 0x60}, {0x76, 0x05}, {0x51, 0x30}, //pd reset restg {0x52, 0x2a}, //pd reset tg {0x3f, 0x00}, //mirror & flip {0x27, 0x00}, //wy171205 {0x9d, 0x96}, {0xd0, 0x03}, {0xd1, 0x01}, {0xd2, 0xd0}, {0xd3, 0x02}, {0xd4, 0x40}, {0xfb, 0x7b}, {0xf0, 0x00}, {0xf1, 0x00}, {0xf2, 0x00}, {0xf3, 0x00}, {0xa1, 0x04}, //{0xac, 0x01}, {0xb1, 0x01}, {0xfd, 0x02}, {0x1d, 0x01}, {0x8a, 0x0f}, {0xfd, 0x01}, {REG_NULL, 0x00}, }; /* * Xclk 24Mhz * max_framerate 30fps * mipi_datarate per lane 656Mbps */ static const struct regval sp250a_1600x1200_regs[] = { {REG_NULL, 0x00}, }; static const struct sp250a_mode supported_modes[] = { { .width = 1600, .height = 1200, .max_fps = { .numerator = 10000, .denominator = 302262, }, .exp_def = 0x0480, .hts_def = 0x10DC, .vts_def = 0x04E6, .reg_list = sp250a_1600x1200_regs, }, }; static const s64 link_freq_menu_items[] = { SP250A_LINK_FREQ_MHZ }; /* Write registers up to 4 at a time */ static int sp250a_write_reg(struct i2c_client *client, u8 reg, u8 val) { struct i2c_msg msg; u8 buf[2]; int ret; buf[0] = reg & 0xFF; buf[1] = val; msg.addr = client->addr; msg.flags = client->flags; msg.buf = buf; msg.len = sizeof(buf); ret = i2c_transfer(client->adapter, &msg, 1); if (ret >= 0) return 0; dev_err(&client->dev, "sp250a write reg(0x%x val:0x%x) failed !\n", reg, val); return ret; } static int sp250a_write_array(struct i2c_client *client, const struct regval *regs) { u32 i = 0; int ret = 0; for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) ret = sp250a_write_reg(client, regs[i].addr, regs[i].val); return ret; } /* Read registers up to 4 at a time */ static int sp250a_read_reg(struct i2c_client *client, u8 reg, u8 *val) { struct i2c_msg msg[2]; u8 buf[1]; int ret; buf[0] = reg & 0xFF; msg[0].addr = client->addr; msg[0].flags = client->flags; msg[0].buf = buf; msg[0].len = sizeof(buf); msg[1].addr = client->addr; msg[1].flags = client->flags | I2C_M_RD; msg[1].buf = buf; msg[1].len = 1; ret = i2c_transfer(client->adapter, msg, 2); if (ret >= 0) { *val = buf[0]; return 0; } dev_err(&client->dev, "sp250a read reg:0x%x failed !\n", reg); return ret; } static int sp250a_get_reso_dist(const struct sp250a_mode *mode, struct v4l2_mbus_framefmt *framefmt) { return abs(mode->width - framefmt->width) + abs(mode->height - framefmt->height); } static const struct sp250a_mode * sp250a_find_best_fit(struct v4l2_subdev_format *fmt) { struct v4l2_mbus_framefmt *framefmt = &fmt->format; int dist; int cur_best_fit = 0; int cur_best_fit_dist = -1; unsigned int i; for (i = 0; i < ARRAY_SIZE(supported_modes); i++) { dist = sp250a_get_reso_dist(&supported_modes[i], framefmt); if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) { cur_best_fit_dist = dist; cur_best_fit = i; } } return &supported_modes[cur_best_fit]; } static int sp250a_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct sp250a *sp250a = to_sp250a(sd); const struct sp250a_mode *mode; s64 h_blank, vblank_def; mutex_lock(&sp250a->mutex); mode = sp250a_find_best_fit(fmt); fmt->format.code = SP250A_MEDIA_BUS_FMT; fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.field = V4L2_FIELD_NONE; if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; #else mutex_unlock(&sp250a->mutex); return -ENOTTY; #endif } else { sp250a->cur_mode = mode; h_blank = mode->hts_def - mode->width; __v4l2_ctrl_modify_range(sp250a->hblank, h_blank, h_blank, 1, h_blank); vblank_def = mode->vts_def - mode->height; __v4l2_ctrl_modify_range(sp250a->vblank, vblank_def, SP250A_VTS_MAX - mode->height, 1, vblank_def); } mutex_unlock(&sp250a->mutex); return 0; } static int sp250a_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct sp250a *sp250a = to_sp250a(sd); const struct sp250a_mode *mode = sp250a->cur_mode; mutex_lock(&sp250a->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad); #else mutex_unlock(&sp250a->mutex); return -ENOTTY; #endif } else { fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.code = SP250A_MEDIA_BUS_FMT; fmt->format.field = V4L2_FIELD_NONE; } mutex_unlock(&sp250a->mutex); return 0; } static int sp250a_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { if (code->index != 0) return -EINVAL; code->code = SP250A_MEDIA_BUS_FMT; return 0; } static int sp250a_enum_frame_sizes(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { if (fse->index >= ARRAY_SIZE(supported_modes)) return -EINVAL; if (fse->code != SP250A_MEDIA_BUS_FMT) 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 sp250a_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { struct sp250a *sp250a = to_sp250a(sd); const struct sp250a_mode *mode = sp250a->cur_mode; mutex_lock(&sp250a->mutex); fi->interval = mode->max_fps; mutex_unlock(&sp250a->mutex); return 0; } static void sp250a_get_module_inf(struct sp250a *sp250a, struct rkmodule_inf *inf) { memset(inf, 0, sizeof(*inf)); strscpy(inf->base.sensor, SP250A_NAME, sizeof(inf->base.sensor)); strscpy(inf->base.module, sp250a->module_name, sizeof(inf->base.module)); strscpy(inf->base.lens, sp250a->len_name, sizeof(inf->base.lens)); } static long sp250a_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct sp250a *sp250a = to_sp250a(sd); long ret = 0; u32 stream = 0; switch (cmd) { case RKMODULE_GET_MODULE_INFO: sp250a_get_module_inf(sp250a, (struct rkmodule_inf *)arg); break; case RKMODULE_SET_QUICK_STREAM: stream = *((u32 *)arg); if (stream) { ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_CTRL_MODE, SP250A_MODE_STREAMING); } else { ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_CTRL_MODE, SP250A_MODE_SW_STANDBY); } break; default: ret = -ENOTTY; break; } return ret; } #ifdef CONFIG_COMPAT static long sp250a_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd, unsigned long arg) { void __user *up = compat_ptr(arg); struct rkmodule_inf *inf; struct rkmodule_awb_cfg *cfg; long ret; u32 stream = 0; switch (cmd) { case RKMODULE_GET_MODULE_INFO: inf = kzalloc(sizeof(*inf), GFP_KERNEL); if (!inf) { ret = -ENOMEM; return ret; } ret = sp250a_ioctl(sd, cmd, inf); if (!ret) ret = copy_to_user(up, inf, sizeof(*inf)); kfree(inf); break; case RKMODULE_AWB_CFG: cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); if (!cfg) { ret = -ENOMEM; return ret; } ret = copy_from_user(cfg, up, sizeof(*cfg)); if (!ret) ret = sp250a_ioctl(sd, cmd, cfg); kfree(cfg); break; case RKMODULE_SET_QUICK_STREAM: ret = copy_from_user(&stream, up, sizeof(u32)); if (!ret) ret = sp250a_ioctl(sd, cmd, &stream); break; default: ret = -ENOIOCTLCMD; break; } return ret; } #endif static int __sp250a_start_stream(struct sp250a *sp250a) { int ret; ret = sp250a_write_array(sp250a->client, sp250a->cur_mode->reg_list); if (ret) return ret; /* In case these controls are set before streaming */ mutex_unlock(&sp250a->mutex); ret = v4l2_ctrl_handler_setup(&sp250a->ctrl_handler); mutex_lock(&sp250a->mutex); if (ret) return ret; ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_CTRL_MODE, SP250A_MODE_STREAMING); return ret; } static int __sp250a_stop_stream(struct sp250a *sp250a) { int ret; ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_CTRL_MODE, SP250A_MODE_SW_STANDBY); return ret; } static int sp250a_s_stream(struct v4l2_subdev *sd, int on) { struct sp250a *sp250a = to_sp250a(sd); struct i2c_client *client = sp250a->client; int ret = 0; dev_info(&client->dev, "%s: on: %d, %dx%d@%d\n", __func__, on, sp250a->cur_mode->width, sp250a->cur_mode->height, DIV_ROUND_CLOSEST(sp250a->cur_mode->max_fps.denominator, sp250a->cur_mode->max_fps.numerator)); mutex_lock(&sp250a->mutex); on = !!on; if (on == sp250a->streaming) goto unlock_and_return; if (on) { ret = pm_runtime_get_sync(&client->dev); if (ret < 0) { pm_runtime_put_noidle(&client->dev); goto unlock_and_return; } ret = __sp250a_start_stream(sp250a); if (ret) { v4l2_err(sd, "start stream failed while write regs\n"); pm_runtime_put(&client->dev); goto unlock_and_return; } } else { __sp250a_stop_stream(sp250a); pm_runtime_put(&client->dev); } sp250a->streaming = on; unlock_and_return: mutex_unlock(&sp250a->mutex); return ret; } static int sp250a_s_power(struct v4l2_subdev *sd, int on) { struct sp250a *sp250a = to_sp250a(sd); struct i2c_client *client = sp250a->client; int ret = 0; mutex_lock(&sp250a->mutex); /* If the power state is not modified - no work to do. */ if (sp250a->power_on == !!on) goto unlock_and_return; if (on) { ret = pm_runtime_get_sync(&client->dev); if (ret < 0) { pm_runtime_put_noidle(&client->dev); goto unlock_and_return; } ret = sp250a_write_array(sp250a->client, sp250a_global_regs); if (ret) { v4l2_err(sd, "could not set init registers\n"); pm_runtime_put_noidle(&client->dev); goto unlock_and_return; } sp250a->power_on = true; } else { pm_runtime_put(&client->dev); sp250a->power_on = false; } unlock_and_return: mutex_unlock(&sp250a->mutex); return ret; } /* Calculate the delay in us by clock rate and clock cycles */ static inline u32 sp250a_cal_delay(u32 cycles) { return DIV_ROUND_UP(cycles, SP250A_XVCLK_FREQ / 1000 / 1000); } static int __sp250a_power_on(struct sp250a *sp250a) { int ret; u32 delay_us; struct device *dev = &sp250a->client->dev; if (!IS_ERR_OR_NULL(sp250a->pins_default)) { ret = pinctrl_select_state(sp250a->pinctrl, sp250a->pins_default); if (ret < 0) dev_err(dev, "could not set pins\n"); } ret = clk_set_rate(sp250a->xvclk, SP250A_XVCLK_FREQ); if (ret < 0) dev_warn(dev, "Failed to set xvclk rate (24MHz)\n"); if (clk_get_rate(sp250a->xvclk) != SP250A_XVCLK_FREQ) dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n"); ret = clk_prepare_enable(sp250a->xvclk); if (ret < 0) { dev_err(dev, "Failed to enable xvclk\n"); return ret; } if (!IS_ERR(sp250a->reset_gpio)) gpiod_set_value_cansleep(sp250a->reset_gpio, 0); ret = regulator_bulk_enable(SP250A_NUM_SUPPLIES, sp250a->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators\n"); goto disable_clk; } usleep_range(500, 1000); if (!IS_ERR(sp250a->pwdn_gpio)) gpiod_set_value_cansleep(sp250a->pwdn_gpio, 0); usleep_range(1000, 1100); if (!IS_ERR(sp250a->reset_gpio)) gpiod_set_value_cansleep(sp250a->reset_gpio, 1); /* 8192 cycles prior to first SCCB transaction */ delay_us = sp250a_cal_delay(8192); usleep_range(delay_us, delay_us * 2); return 0; disable_clk: clk_disable_unprepare(sp250a->xvclk); return ret; } static void __sp250a_power_off(struct sp250a *sp250a) { int ret = 0; clk_disable_unprepare(sp250a->xvclk); if (!IS_ERR(sp250a->reset_gpio)) gpiod_set_value_cansleep(sp250a->reset_gpio, 0); if (!IS_ERR(sp250a->pwdn_gpio)) gpiod_set_value_cansleep(sp250a->pwdn_gpio, 1); if (!IS_ERR_OR_NULL(sp250a->pins_sleep)) { ret = pinctrl_select_state(sp250a->pinctrl, sp250a->pins_sleep); if (ret < 0) dev_dbg(&sp250a->client->dev, "could not set pins\n"); } regulator_bulk_disable(SP250A_NUM_SUPPLIES, sp250a->supplies); } static int sp250a_runtime_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct sp250a *sp250a = to_sp250a(sd); return __sp250a_power_on(sp250a); } static int sp250a_runtime_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct sp250a *sp250a = to_sp250a(sd); __sp250a_power_off(sp250a); return 0; } #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API static int sp250a_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct sp250a *sp250a = to_sp250a(sd); struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, fh->pad, 0); const struct sp250a_mode *def_mode = &supported_modes[0]; mutex_lock(&sp250a->mutex); /* Initialize try_fmt */ try_fmt->width = def_mode->width; try_fmt->height = def_mode->height; try_fmt->code = SP250A_MEDIA_BUS_FMT; try_fmt->field = V4L2_FIELD_NONE; mutex_unlock(&sp250a->mutex); /* No crop or compose */ return 0; } #endif static int sp250a_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_interval_enum *fie) { if (fie->index >= ARRAY_SIZE(supported_modes)) return -EINVAL; if (fie->code != SP250A_MEDIA_BUS_FMT) return -EINVAL; fie->width = supported_modes[fie->index].width; fie->height = supported_modes[fie->index].height; fie->interval = supported_modes[fie->index].max_fps; return 0; } static int sp250a_g_mbus_config(struct v4l2_subdev *sd, struct v4l2_mbus_config *config) { u32 val = 0; val = 1 << (SP250A_LANES - 1) | V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CONTINUOUS_CLOCK; config->type = V4L2_MBUS_CSI2; config->flags = val; return 0; } static const struct dev_pm_ops sp250a_pm_ops = { SET_RUNTIME_PM_OPS(sp250a_runtime_suspend, sp250a_runtime_resume, NULL) }; #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API static const struct v4l2_subdev_internal_ops sp250a_internal_ops = { .open = sp250a_open, }; #endif static const struct v4l2_subdev_core_ops sp250a_core_ops = { .s_power = sp250a_s_power, .ioctl = sp250a_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = sp250a_compat_ioctl32, #endif }; static const struct v4l2_subdev_video_ops sp250a_video_ops = { .s_stream = sp250a_s_stream, .g_frame_interval = sp250a_g_frame_interval, .g_mbus_config = sp250a_g_mbus_config, }; static const struct v4l2_subdev_pad_ops sp250a_pad_ops = { .enum_mbus_code = sp250a_enum_mbus_code, .enum_frame_size = sp250a_enum_frame_sizes, .enum_frame_interval = sp250a_enum_frame_interval, .get_fmt = sp250a_get_fmt, .set_fmt = sp250a_set_fmt, }; static const struct v4l2_subdev_ops sp250a_subdev_ops = { .core = &sp250a_core_ops, .video = &sp250a_video_ops, .pad = &sp250a_pad_ops, }; static int sp250a_set_gain_reg(struct sp250a *sp250a, u32 a_gain) { int ret = 0; ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_AGAIN, a_gain & 0xff); ret |= sp250a_write_reg(sp250a->client, 0x01, 0x01); return ret; } static int sp250a_set_ctrl(struct v4l2_ctrl *ctrl) { struct sp250a *sp250a = container_of(ctrl->handler, struct sp250a, ctrl_handler); struct i2c_client *client = sp250a->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 = sp250a->cur_mode->height + ctrl->val - 4; __v4l2_ctrl_modify_range(sp250a->exposure, sp250a->exposure->minimum, max, sp250a->exposure->step, sp250a->exposure->default_value); break; } if (!pm_runtime_get_if_in_use(&client->dev)) return 0; switch (ctrl->id) { case V4L2_CID_EXPOSURE: dev_dbg(&client->dev, "set exposure value 0x%x\n", ctrl->val); /* 4 least significant bits of expsoure are fractional part */ ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_EXPOSURE_H, SP250A_FETCH_HIGH_BYTE_EXP(ctrl->val)); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_EXPOSURE_L, SP250A_FETCH_LOW_BYTE_EXP(ctrl->val)); ret |= sp250a_write_reg(sp250a->client, 0x01, 0x01); break; case V4L2_CID_ANALOGUE_GAIN: dev_dbg(&client->dev, "set analog gain value 0x%x\n", ctrl->val); ret = sp250a_set_gain_reg(sp250a, ctrl->val); break; case V4L2_CID_VBLANK: dev_dbg(&client->dev, "set vb value 0x%x\n", ctrl->val); ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ONE); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_VTS_H, ((ctrl->val - 32) >> 8) & 0xff); ret |= sp250a_write_reg(sp250a->client, SP250A_REG_VTS_L, (ctrl->val - 32) & 0xff); ret |= sp250a_write_reg(sp250a->client, 0x01, 0x01); 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 sp250a_ctrl_ops = { .s_ctrl = sp250a_set_ctrl, }; static int sp250a_initialize_controls(struct sp250a *sp250a) { const struct sp250a_mode *mode; struct v4l2_ctrl_handler *handler; struct v4l2_ctrl *ctrl; s64 exposure_max, vblank_def; u32 h_blank; int ret; handler = &sp250a->ctrl_handler; mode = sp250a->cur_mode; ret = v4l2_ctrl_handler_init(handler, 8); if (ret) return ret; handler->lock = &sp250a->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; v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0, SP250A_PIXEL_RATE, 1, SP250A_PIXEL_RATE); h_blank = mode->hts_def - mode->width; sp250a->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, h_blank, h_blank, 1, h_blank); if (sp250a->hblank) sp250a->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; vblank_def = mode->vts_def - mode->height; sp250a->vblank = v4l2_ctrl_new_std(handler, &sp250a_ctrl_ops, V4L2_CID_VBLANK, vblank_def, SP250A_VTS_MAX - mode->height, 1, vblank_def); exposure_max = mode->vts_def - 4; sp250a->exposure = v4l2_ctrl_new_std(handler, &sp250a_ctrl_ops, V4L2_CID_EXPOSURE, SP250A_EXPOSURE_MIN, exposure_max, SP250A_EXPOSURE_STEP, mode->exp_def); sp250a->anal_gain = v4l2_ctrl_new_std(handler, &sp250a_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, SP250A_GAIN_MIN, SP250A_GAIN_MAX, SP250A_GAIN_STEP, SP250A_GAIN_DEFAULT); if (handler->error) { ret = handler->error; dev_err(&sp250a->client->dev, "Failed to init controls(%d)\n", ret); goto err_free_handler; } sp250a->subdev.ctrl_handler = handler; return 0; err_free_handler: v4l2_ctrl_handler_free(handler); return ret; } static int sp250a_check_sensor_id(struct sp250a *sp250a, struct i2c_client *client) { struct device *dev = &sp250a->client->dev; u16 id = 0; u8 reg_H = 0; u8 reg_L = 0; int ret; ret = sp250a_write_reg(sp250a->client, SP250A_REG_SET_PAGE, SP250A_SET_PAGE_ZERO); ret |= sp250a_read_reg(client, SP250A_REG_CHIP_ID_H, ®_H); ret |= sp250a_read_reg(client, SP250A_REG_CHIP_ID_L, ®_L); id = ((reg_H << 8) & 0xff00) | (reg_L & 0xff); if (id != CHIP_ID) { dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret); return -ENODEV; } dev_info(dev, "Detected SP%06x sensor\n", CHIP_ID); return ret; } static int sp250a_configure_regulators(struct sp250a *sp250a) { unsigned int i; for (i = 0; i < SP250A_NUM_SUPPLIES; i++) sp250a->supplies[i].supply = sp250a_supply_names[i]; return devm_regulator_bulk_get(&sp250a->client->dev, SP250A_NUM_SUPPLIES, sp250a->supplies); } static int sp250a_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct device_node *node = dev->of_node; struct sp250a *sp250a; struct v4l2_subdev *sd; char facing[2]; int ret; dev_info(dev, "driver version: %02x.%02x.%02x", DRIVER_VERSION >> 16, (DRIVER_VERSION & 0xff00) >> 8, DRIVER_VERSION & 0x00ff); sp250a = devm_kzalloc(dev, sizeof(*sp250a), GFP_KERNEL); if (!sp250a) return -ENOMEM; ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX, &sp250a->module_index); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING, &sp250a->module_facing); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME, &sp250a->module_name); ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME, &sp250a->len_name); if (ret) { dev_err(dev, "could not get module information!\n"); return -EINVAL; } sp250a->client = client; sp250a->cur_mode = &supported_modes[0]; sp250a->xvclk = devm_clk_get(dev, "xvclk"); if (IS_ERR(sp250a->xvclk)) { dev_err(dev, "Failed to get xvclk\n"); return -EINVAL; } sp250a->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(sp250a->reset_gpio)) dev_warn(dev, "Failed to get reset-gpios\n"); sp250a->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW); if (IS_ERR(sp250a->pwdn_gpio)) dev_warn(dev, "Failed to get pwdn-gpios\n"); ret = sp250a_configure_regulators(sp250a); if (ret) { dev_err(dev, "Failed to get power regulators\n"); return ret; } sp250a->pinctrl = devm_pinctrl_get(dev); if (!IS_ERR(sp250a->pinctrl)) { sp250a->pins_default = pinctrl_lookup_state(sp250a->pinctrl, OF_CAMERA_PINCTRL_STATE_DEFAULT); if (IS_ERR(sp250a->pins_default)) dev_err(dev, "could not get default pinstate\n"); sp250a->pins_sleep = pinctrl_lookup_state(sp250a->pinctrl, OF_CAMERA_PINCTRL_STATE_SLEEP); if (IS_ERR(sp250a->pins_sleep)) dev_err(dev, "could not get sleep pinstate\n"); } mutex_init(&sp250a->mutex); sd = &sp250a->subdev; v4l2_i2c_subdev_init(sd, client, &sp250a_subdev_ops); ret = sp250a_initialize_controls(sp250a); if (ret) goto err_destroy_mutex; ret = __sp250a_power_on(sp250a); if (ret) goto err_free_handler; ret = sp250a_check_sensor_id(sp250a, client); if (ret) goto err_power_off; #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API sd->internal_ops = &sp250a_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; #endif #if defined(CONFIG_MEDIA_CONTROLLER) sp250a->pad.flags = MEDIA_PAD_FL_SOURCE; sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = media_entity_pads_init(&sd->entity, 1, &sp250a->pad); if (ret < 0) goto err_power_off; #endif memset(facing, 0, sizeof(facing)); if (strcmp(sp250a->module_facing, "back") == 0) facing[0] = 'b'; else facing[0] = 'f'; snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s", sp250a->module_index, facing, SP250A_NAME, dev_name(sd->dev)); ret = v4l2_async_register_subdev_sensor_common(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: #if defined(CONFIG_MEDIA_CONTROLLER) media_entity_cleanup(&sd->entity); #endif err_power_off: __sp250a_power_off(sp250a); err_free_handler: v4l2_ctrl_handler_free(&sp250a->ctrl_handler); err_destroy_mutex: mutex_destroy(&sp250a->mutex); return ret; } static int sp250a_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct sp250a *sp250a = to_sp250a(sd); v4l2_async_unregister_subdev(sd); #if defined(CONFIG_MEDIA_CONTROLLER) media_entity_cleanup(&sd->entity); #endif v4l2_ctrl_handler_free(&sp250a->ctrl_handler); mutex_destroy(&sp250a->mutex); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) __sp250a_power_off(sp250a); pm_runtime_set_suspended(&client->dev); return 0; } #if IS_ENABLED(CONFIG_OF) static const struct of_device_id sp250a_of_match[] = { { .compatible = "superpix,sp250a" }, {}, }; MODULE_DEVICE_TABLE(of, sp250a_of_match); #endif static const struct i2c_device_id sp250a_match_id[] = { { "superpix,sp250a", 0 }, { }, }; static struct i2c_driver sp250a_i2c_driver = { .driver = { .name = SP250A_NAME, .pm = &sp250a_pm_ops, .of_match_table = of_match_ptr(sp250a_of_match), }, .probe = &sp250a_probe, .remove = &sp250a_remove, .id_table = sp250a_match_id, }; static int __init sensor_mod_init(void) { return i2c_add_driver(&sp250a_i2c_driver); } static void __exit sensor_mod_exit(void) { i2c_del_driver(&sp250a_i2c_driver); } device_initcall_sync(sensor_mod_init); module_exit(sensor_mod_exit); MODULE_DESCRIPTION("SuperPix sp250a sensor driver"); MODULE_LICENSE("GPL v2");