// SPDX-License-Identifier: GPL-2.0 /* * sc035gs driver * * Copyright (C) 2022 Rockchip Electronics Co., Ltd. * V0.1.0: MIPI is ok. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x00) #ifndef V4L2_CID_DIGITAL_GAIN #define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN #endif #define MIPI_FREQ_180M 180000000 #define MIPI_FREQ_300M 300000000 #define PIXEL_RATE_WITH_180M (MIPI_FREQ_180M * 2 / 10 * 2) #define PIXEL_RATE_WITH_300M (MIPI_FREQ_300M * 2 / 8 * 1) #define SC035GS_XVCLK_FREQ 24000000 #define CHIP_ID 0x0108 #define SC132GS_REG_CHIP_ID 0x300A #define SC035GS_REG_CTRL_MODE 0x0100 #define SC035GS_MODE_SW_STANDBY 0x0 #define SC035GS_MODE_STREAMING BIT(0) #define SC035GS_REG_EXPOSURE 0x3e01 #define SC035GS_EXPOSURE_MIN 6 #define SC035GS_EXPOSURE_STEP 1 #define SC035GS_VTS_MAX 0xffff #define SC035GS_REG_COARSE_AGAIN 0x3e08 #define SC035GS_REG_FINE_AGAIN 0x3e09 #define ANALOG_GAIN_MIN 0x01 #define ANALOG_GAIN_MAX 0xF8 #define ANALOG_GAIN_STEP 1 #define ANALOG_GAIN_DEFAULT 0x1f #define SC035GS_REG_TEST_PATTERN 0x4501 #define SC035GS_TEST_PATTERN_ENABLE 0xcc #define SC035GS_TEST_PATTERN_DISABLE 0xc4 #define SC035GS_REG_VTS 0x320e #define REG_NULL 0xFFFF #define SC035GS_REG_VALUE_08BIT 1 #define SC035GS_REG_VALUE_16BIT 2 #define SC035GS_REG_VALUE_24BIT 3 #define SC035GS_NAME "sc035gs" #define OF_CAMERA_PINCTRL_STATE_DEFAULT "rockchip,camera_default" #define OF_CAMERA_PINCTRL_STATE_SLEEP "rockchip,camera_sleep" static const char *const sc035gs_supply_names[] = { "avdd", /* Analog power */ "dovdd", /* Digital I/O power */ "dvdd", /* Digital core power */ }; #define SC035GS_NUM_SUPPLIES ARRAY_SIZE(sc035gs_supply_names) enum { LINK_FREQ_180M_INDEX, LINK_FREQ_300M_INDEX, }; struct regval { u16 addr; u8 val; }; struct sc035gs_mode { u32 width; u32 height; struct v4l2_fract max_fps; u32 hts_def; u32 vts_def; u32 exp_def; u32 link_freq_index; u64 pixel_rate; const struct regval *reg_list; u32 lanes; u32 bus_fmt; }; struct sc035gs { struct i2c_client *client; struct clk *xvclk; struct gpio_desc *reset_gpio; struct gpio_desc *pwdn_gpio; struct regulator_bulk_data supplies[SC035GS_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 v4l2_ctrl *test_pattern; struct v4l2_ctrl *pixel_rate; struct v4l2_ctrl *link_freq; struct mutex mutex; struct v4l2_fract cur_fps; u32 cur_vts; bool streaming; bool power_on; const struct sc035gs_mode *cur_mode; u32 module_index; const char *module_facing; const char *module_name; const char *len_name; }; #define to_sc035gs(sd) container_of(sd, struct sc035gs, subdev) /* * Xclk 24Mhz * Pclk 72Mhz * linelength 1600(0x06a0) * framelength 1250(0x04e2) * grabwindow_width 640 * grabwindow_height 480 * mipi 2 lane * max_framerate 30fps * mipi_datarate per lane 360Mbps */ static const struct regval sc035gs_2lane_10bit_regs[] = { {0x0103, 0x01}, {0x0100, 0x00}, {0x36e9, 0x80}, {0x36f9, 0x80}, {0x3000, 0x00}, {0x3001, 0x00}, {0x300f, 0x0f}, {0x3018, 0x33}, {0x3019, 0xfc}, {0x301c, 0x78}, {0x301f, 0x9c}, {0x3031, 0x0a}, {0x3037, 0x20}, {0x303f, 0x01}, {0x320c, 0x06}, {0x320d, 0x40}, {0x320e, 0x04}, {0x320f, 0xe2}, {0x3217, 0x00}, {0x3218, 0x00}, {0x3220, 0x10}, {0x3223, 0x48}, {0x3226, 0x74}, {0x3227, 0x07}, {0x323b, 0x00}, {0x3250, 0xf0}, {0x3251, 0x02}, {0x3252, 0x02}, {0x3253, 0x08}, {0x3254, 0x02}, {0x3255, 0x07}, {0x3304, 0x48}, {0x3305, 0x00}, {0x3306, 0x98}, {0x3309, 0x50}, {0x330a, 0x01}, {0x330b, 0x18}, {0x330c, 0x18}, {0x330f, 0x40}, {0x3310, 0x10}, {0x3314, 0x68}, {0x3315, 0x30}, {0x3316, 0x68}, {0x3317, 0x14}, {0x3329, 0x5c}, {0x332d, 0x5c}, {0x332f, 0x60}, {0x3335, 0x64}, {0x3344, 0x64}, {0x335b, 0x80}, {0x335f, 0x80}, {0x3366, 0x06}, {0x3385, 0x41}, {0x3387, 0x49}, {0x3389, 0x01}, {0x33b1, 0x03}, {0x33b2, 0x06}, {0x33bd, 0xe0}, {0x33bf, 0x10}, {0x3621, 0xa4}, {0x3622, 0x05}, {0x3624, 0x47}, {0x3630, 0x4a}, {0x3631, 0x58}, {0x3633, 0x52}, {0x3635, 0x03}, {0x3636, 0x25}, {0x3637, 0x8a}, {0x3638, 0x0f}, {0x3639, 0x08}, {0x363a, 0x00}, {0x363b, 0x48}, {0x363c, 0x86}, {0x363e, 0xf8}, {0x3640, 0x00}, {0x3641, 0x01}, {0x36ea, 0x3b}, {0x36eb, 0x0e}, {0x36ec, 0x1e}, {0x36ed, 0x20}, {0x36fa, 0x3b}, {0x36fb, 0x10}, {0x36fc, 0x02}, {0x36fd, 0x00}, {0x3908, 0x91}, {0x391b, 0x81}, {0x3d08, 0x01}, {0x3e01, 0x18}, {0x3e02, 0xf0}, {0x3f04, 0x06}, {0x3f05, 0x20}, {0x4500, 0x59}, {0x4501, 0xc4}, {0x4603, 0x00}, {0x4800, 0x64}, {0x4809, 0x01}, {0x4810, 0x00}, {0x4811, 0x01}, {0x4837, 0x42}, {0x5011, 0x00}, {0x5988, 0x02}, {0x598e, 0x06}, {0x598f, 0x08}, {0x36e9, 0x24}, {0x36f9, 0x24}, //again adjust {0x4418, 0x0a}, {0x363d, 0x10}, {0x4419, 0x80}, //mirror & flip {0x3221, (0x03 << 1)}, //exposure 5ms {0x3e01, 0x13}, {0x3e02, 0xc0}, //dgain 1 {0x3e06, 0x0c}, {0x3e07, 0x80}, //gain < 2 {0x3631, 0x58}, {0x3630, 0x4a}, //again 1 {0x3e08, 0x03}, {0x3e09, 0x10}, {REG_NULL, 0x00}, }; static const struct sc035gs_mode supported_modes[] = { { .width = 640, .height = 480, .max_fps = { .numerator = 10000, .denominator = 300000, }, .exp_def = 0x0bb, .hts_def = 0x640, .vts_def = 0x4e2, .link_freq_index = LINK_FREQ_300M_INDEX, .pixel_rate = PIXEL_RATE_WITH_300M, .reg_list = sc035gs_2lane_10bit_regs, .lanes = 2, .bus_fmt = MEDIA_BUS_FMT_Y10_1X10, }, }; static const char *const sc035gs_test_pattern_menu[] = { "Disabled", "Vertical Color Bar Type 1", "Vertical Color Bar Type 2", "Vertical Color Bar Type 3", "Vertical Color Bar Type 4" }; static const s64 link_freq_menu_items[] = { MIPI_FREQ_180M, MIPI_FREQ_300M, }; /* Write registers up to 4 at a time */ static int sc035gs_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; u32 ret; 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++]; ret = i2c_master_send(client, buf, len + 2); if (ret != len + 2) return -EIO; return 0; } static int sc035gs_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 = sc035gs_write_reg(client, regs[i].addr, SC035GS_REG_VALUE_08BIT, regs[i].val); } return ret; } /* Read registers up to 4 at a time */ static int sc035gs_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 sc035gs_get_reso_dist(const struct sc035gs_mode *mode, struct v4l2_mbus_framefmt *framefmt) { return abs(mode->width - framefmt->width) + abs(mode->height - framefmt->height); } static const struct sc035gs_mode * sc035gs_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 = sc035gs_get_reso_dist(&supported_modes[i], framefmt); if ((cur_best_fit_dist == -1 || dist < cur_best_fit_dist) && (supported_modes[i].bus_fmt == framefmt->code)) { cur_best_fit_dist = dist; cur_best_fit = i; } } return &supported_modes[cur_best_fit]; } static int sc035gs_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct sc035gs *sc035gs = to_sc035gs(sd); const struct sc035gs_mode *mode; s64 h_blank, vblank_def; mutex_lock(&sc035gs->mutex); mode = sc035gs_find_best_fit(fmt); fmt->format.code = mode->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(&sc035gs->mutex); return -ENOTTY; #endif } else { sc035gs->cur_mode = mode; h_blank = mode->hts_def - mode->width; __v4l2_ctrl_modify_range(sc035gs->hblank, h_blank, h_blank, 1, h_blank); vblank_def = mode->vts_def - mode->height; __v4l2_ctrl_modify_range(sc035gs->vblank, vblank_def, SC035GS_VTS_MAX - mode->height, 1, vblank_def); __v4l2_ctrl_s_ctrl_int64(sc035gs->pixel_rate, mode->pixel_rate); __v4l2_ctrl_s_ctrl(sc035gs->link_freq, mode->link_freq_index); sc035gs->cur_vts = mode->vts_def; sc035gs->cur_fps = mode->max_fps; } mutex_unlock(&sc035gs->mutex); return 0; } static int sc035gs_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct sc035gs *sc035gs = to_sc035gs(sd); const struct sc035gs_mode *mode = sc035gs->cur_mode; mutex_lock(&sc035gs->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(&sc035gs->mutex); return -ENOTTY; #endif } else { fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.code = mode->bus_fmt; fmt->format.field = V4L2_FIELD_NONE; } mutex_unlock(&sc035gs->mutex); return 0; } static int sc035gs_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { struct sc035gs *sc035gs = to_sc035gs(sd); if (code->index != 0) return -EINVAL; code->code = sc035gs->cur_mode->bus_fmt; return 0; } static int sc035gs_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 != supported_modes[fse->index].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 sc035gs_enable_test_pattern(struct sc035gs *sc035gs, u32 pattern) { u32 val; if (pattern) val = (pattern - 1) | SC035GS_TEST_PATTERN_ENABLE; else val = SC035GS_TEST_PATTERN_DISABLE; return sc035gs_write_reg(sc035gs->client, SC035GS_REG_TEST_PATTERN, SC035GS_REG_VALUE_08BIT, val); } static void sc035gs_get_module_inf(struct sc035gs *sc035gs, struct rkmodule_inf *inf) { memset(inf, 0, sizeof(*inf)); strscpy(inf->base.sensor, SC035GS_NAME, sizeof(inf->base.sensor)); strscpy(inf->base.module, sc035gs->module_name, sizeof(inf->base.module)); strscpy(inf->base.lens, sc035gs->len_name, sizeof(inf->base.lens)); } static long sc035gs_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct sc035gs *sc035gs = to_sc035gs(sd); long ret = 0; u32 stream = 0; switch (cmd) { case RKMODULE_GET_MODULE_INFO: sc035gs_get_module_inf(sc035gs, (struct rkmodule_inf *)arg); break; case RKMODULE_SET_QUICK_STREAM: stream = *((u32 *)arg); if (stream) ret = sc035gs_write_reg(sc035gs->client, SC035GS_REG_CTRL_MODE, SC035GS_REG_VALUE_08BIT, SC035GS_MODE_STREAMING); else ret = sc035gs_write_reg(sc035gs->client, SC035GS_REG_CTRL_MODE, SC035GS_REG_VALUE_08BIT, SC035GS_MODE_SW_STANDBY); break; default: ret = -ENOIOCTLCMD; break; } return ret; } #ifdef CONFIG_COMPAT static long sc035gs_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd, unsigned long arg) { void __user *up = compat_ptr(arg); struct rkmodule_inf *inf; long ret = 0; u32 stream = 0; switch (cmd) { case RKMODULE_GET_MODULE_INFO: inf = kzalloc(sizeof(*inf), GFP_KERNEL); if (!inf) { ret = -ENOMEM; return ret; } ret = sc035gs_ioctl(sd, cmd, inf); if (!ret) { ret = copy_to_user(up, inf, sizeof(*inf)); if (ret) ret = -EFAULT; } kfree(inf); break; case RKMODULE_SET_QUICK_STREAM: if (copy_from_user(&stream, up, sizeof(u32))) return -EFAULT; ret = sc035gs_ioctl(sd, cmd, &stream); break; default: ret = -ENOIOCTLCMD; break; } return ret; } #endif static int sc035gs_set_ctrl_gain(struct sc035gs *sc035gs, u32 a_gain) { int ret = 0; u32 coarse_again, fine_again, fine_again_reg, coarse_again_reg; /* (1.0 - 15.5) * 0x10 (fix point) */ if (a_gain < 0x10) a_gain = 0x10; if (a_gain > 0xf8) a_gain = 0xf8; if (a_gain < 0x20) { /*1x ~ 2x*/ coarse_again = 0x3; fine_again = a_gain * 16 / 0x10; } else if (a_gain < 0x40) { /*2x ~ 4x*/ coarse_again = 0x7; fine_again = a_gain * 8 / 0x10; } else if (a_gain < 0x80) { /*4x ~ 8x*/ coarse_again = 0xf; fine_again = a_gain * 4 / 0x10; } else { /*8x ~ 16x*/ coarse_again = 0x1f; fine_again = a_gain * 2 / 0x10; } fine_again_reg = fine_again & 0x1F; coarse_again_reg = coarse_again & 0x1F; if (a_gain < 0x20) { ret |= sc035gs_write_reg(sc035gs->client, 0x3631, SC035GS_REG_VALUE_08BIT, 0x58); ret |= sc035gs_write_reg(sc035gs->client, 0x3630, SC035GS_REG_VALUE_08BIT, 0x4a); } else { ret |= sc035gs_write_reg(sc035gs->client, 0x3631, SC035GS_REG_VALUE_08BIT, 0x48); ret |= sc035gs_write_reg(sc035gs->client, 0x3630, SC035GS_REG_VALUE_08BIT, 0x4c); } ret |= sc035gs_write_reg(sc035gs->client, SC035GS_REG_COARSE_AGAIN, SC035GS_REG_VALUE_08BIT, coarse_again_reg); ret |= sc035gs_write_reg(sc035gs->client, SC035GS_REG_FINE_AGAIN, SC035GS_REG_VALUE_08BIT, fine_again_reg); return ret; } static int __sc035gs_start_stream(struct sc035gs *sc035gs) { int ret; ret = sc035gs_write_array(sc035gs->client, sc035gs->cur_mode->reg_list); if (ret) return ret; /* In case these controls are set before streaming */ mutex_unlock(&sc035gs->mutex); ret = v4l2_ctrl_handler_setup(&sc035gs->ctrl_handler); mutex_lock(&sc035gs->mutex); if (ret) return ret; ret = sc035gs_write_reg(sc035gs->client, SC035GS_REG_CTRL_MODE, SC035GS_REG_VALUE_08BIT, SC035GS_MODE_STREAMING); usleep_range(10000, 12000); ret |= sc035gs_write_reg(sc035gs->client, 0x4418, SC035GS_REG_VALUE_08BIT, 0x0a); ret |= sc035gs_write_reg(sc035gs->client, 0x4419, SC035GS_REG_VALUE_08BIT, 0x80); return ret; } static int __sc035gs_stop_stream(struct sc035gs *sc035gs) { return sc035gs_write_reg(sc035gs->client, SC035GS_REG_CTRL_MODE, SC035GS_REG_VALUE_08BIT, SC035GS_MODE_SW_STANDBY); } static int sc035gs_s_stream(struct v4l2_subdev *sd, int on) { struct sc035gs *sc035gs = to_sc035gs(sd); struct i2c_client *client = sc035gs->client; unsigned int fps; int ret = 0; mutex_lock(&sc035gs->mutex); on = !!on; if (on == sc035gs->streaming) goto unlock_and_return; fps = DIV_ROUND_CLOSEST(sc035gs->cur_mode->max_fps.denominator, sc035gs->cur_mode->max_fps.numerator); dev_info(&sc035gs->client->dev, "%s: on: %d, %dx%d@%d\n", __func__, on, sc035gs->cur_mode->width, sc035gs->cur_mode->height, fps); if (on) { ret = pm_runtime_get_sync(&client->dev); if (ret < 0) { pm_runtime_put_noidle(&client->dev); goto unlock_and_return; } ret = __sc035gs_start_stream(sc035gs); if (ret) { v4l2_err(sd, "start stream failed while write regs\n"); pm_runtime_put(&client->dev); goto unlock_and_return; } } else { __sc035gs_stop_stream(sc035gs); pm_runtime_put(&client->dev); } sc035gs->streaming = on; unlock_and_return: mutex_unlock(&sc035gs->mutex); return ret; } static int sc035gs_s_power(struct v4l2_subdev *sd, int on) { struct sc035gs *sc035gs = to_sc035gs(sd); struct i2c_client *client = sc035gs->client; int ret = 0; mutex_lock(&sc035gs->mutex); /* If the power state is not modified - no work to do. */ if (sc035gs->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; } sc035gs->power_on = true; } else { pm_runtime_put(&client->dev); sc035gs->power_on = false; } unlock_and_return: mutex_unlock(&sc035gs->mutex); return ret; } static int sc035gs_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { struct sc035gs *sc035gs = to_sc035gs(sd); const struct sc035gs_mode *mode = sc035gs->cur_mode; if (sc035gs->streaming) fi->interval = sc035gs->cur_fps; else fi->interval = mode->max_fps; return 0; } /* Calculate the delay in us by clock rate and clock cycles */ static inline u32 sc035gs_cal_delay(u32 cycles) { return DIV_ROUND_UP(cycles, SC035GS_XVCLK_FREQ / 1000 / 1000); } static int __sc035gs_power_on(struct sc035gs *sc035gs) { int ret; u32 delay_us; struct device *dev = &sc035gs->client->dev; if (!IS_ERR_OR_NULL(sc035gs->pins_default)) { ret = pinctrl_select_state(sc035gs->pinctrl, sc035gs->pins_default); if (ret < 0) dev_err(dev, "could not set pins\n"); } ret = clk_set_rate(sc035gs->xvclk, SC035GS_XVCLK_FREQ); if (ret < 0) dev_warn(dev, "Failed to set xvclk rate (24MHz)\n"); if (clk_get_rate(sc035gs->xvclk) != SC035GS_XVCLK_FREQ) dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n"); ret = clk_prepare_enable(sc035gs->xvclk); if (ret < 0) { dev_err(dev, "Failed to enable xvclk\n"); return ret; } ret = regulator_bulk_enable(SC035GS_NUM_SUPPLIES, sc035gs->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators\n"); goto disable_clk; } if (!IS_ERR(sc035gs->reset_gpio)) gpiod_set_value_cansleep(sc035gs->reset_gpio, 1); usleep_range(1000, 2000); if (!IS_ERR(sc035gs->pwdn_gpio)) gpiod_set_value_cansleep(sc035gs->pwdn_gpio, 1); if (!IS_ERR(sc035gs->reset_gpio)) gpiod_set_value_cansleep(sc035gs->reset_gpio, 0); /* 8192 cycles prior to first SCCB transaction */ delay_us = sc035gs_cal_delay(8192); usleep_range(delay_us, delay_us * 2); return 0; disable_clk: clk_disable_unprepare(sc035gs->xvclk); return ret; } static void __sc035gs_power_off(struct sc035gs *sc035gs) { int ret; if (!IS_ERR(sc035gs->reset_gpio)) gpiod_set_value_cansleep(sc035gs->reset_gpio, 1); if (!IS_ERR(sc035gs->pwdn_gpio)) gpiod_set_value_cansleep(sc035gs->pwdn_gpio, 0); clk_disable_unprepare(sc035gs->xvclk); if (!IS_ERR_OR_NULL(sc035gs->pins_sleep)) { ret = pinctrl_select_state(sc035gs->pinctrl, sc035gs->pins_sleep); if (ret < 0) dev_dbg(&sc035gs->client->dev, "could not set pins\n"); } regulator_bulk_disable(SC035GS_NUM_SUPPLIES, sc035gs->supplies); } static int sc035gs_runtime_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct sc035gs *sc035gs = to_sc035gs(sd); return __sc035gs_power_on(sc035gs); } static int sc035gs_runtime_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct sc035gs *sc035gs = to_sc035gs(sd); __sc035gs_power_off(sc035gs); return 0; } #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API static int sc035gs_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct sc035gs *sc035gs = to_sc035gs(sd); struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, fh->pad, 0); const struct sc035gs_mode *def_mode = &supported_modes[0]; mutex_lock(&sc035gs->mutex); /* Initialize try_fmt */ try_fmt->width = def_mode->width; try_fmt->height = def_mode->height; try_fmt->code = def_mode->bus_fmt; try_fmt->field = V4L2_FIELD_NONE; mutex_unlock(&sc035gs->mutex); /* No crop or compose */ return 0; } #endif static int sc035gs_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; fie->code = supported_modes[fie->index].bus_fmt; 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 sc035gs_g_mbus_config(struct v4l2_subdev *sd, unsigned int pad_id, struct v4l2_mbus_config *config) { u32 val = 0; struct sc035gs *sc035gs = to_sc035gs(sd); val = 1 << (sc035gs->cur_mode->lanes - 1) | V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CONTINUOUS_CLOCK; config->type = V4L2_MBUS_CSI2_DPHY; config->flags = val; return 0; } static const struct dev_pm_ops sc035gs_pm_ops = { SET_RUNTIME_PM_OPS(sc035gs_runtime_suspend, sc035gs_runtime_resume, NULL) }; #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API static const struct v4l2_subdev_internal_ops sc035gs_internal_ops = { .open = sc035gs_open, }; #endif static const struct v4l2_subdev_core_ops sc035gs_core_ops = { .s_power = sc035gs_s_power, .ioctl = sc035gs_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = sc035gs_compat_ioctl32, #endif }; static const struct v4l2_subdev_video_ops sc035gs_video_ops = { .s_stream = sc035gs_s_stream, .g_frame_interval = sc035gs_g_frame_interval, }; static const struct v4l2_subdev_pad_ops sc035gs_pad_ops = { .enum_mbus_code = sc035gs_enum_mbus_code, .enum_frame_size = sc035gs_enum_frame_sizes, .enum_frame_interval = sc035gs_enum_frame_interval, .get_fmt = sc035gs_get_fmt, .set_fmt = sc035gs_set_fmt, .get_mbus_config = sc035gs_g_mbus_config, }; static const struct v4l2_subdev_ops sc035gs_subdev_ops = { .core = &sc035gs_core_ops, .video = &sc035gs_video_ops, .pad = &sc035gs_pad_ops, }; static void sc035gs_modify_fps_info(struct sc035gs *sc035gs) { const struct sc035gs_mode *mode = sc035gs->cur_mode; sc035gs->cur_fps.denominator = mode->max_fps.denominator * mode->vts_def / sc035gs->cur_vts; } static int sc035gs_set_ctrl(struct v4l2_ctrl *ctrl) { struct sc035gs *sc035gs = container_of(ctrl->handler, struct sc035gs, ctrl_handler); struct i2c_client *client = sc035gs->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 = sc035gs->cur_mode->height + ctrl->val - 6; __v4l2_ctrl_modify_range(sc035gs->exposure, sc035gs->exposure->minimum, max, sc035gs->exposure->step, sc035gs->exposure->default_value); break; } if (!pm_runtime_get_if_in_use(&client->dev)) return 0; switch (ctrl->id) { case V4L2_CID_EXPOSURE: /* 4 least significant bits of expsoure are fractional part */ ret = sc035gs_write_reg(sc035gs->client, SC035GS_REG_EXPOSURE, SC035GS_REG_VALUE_16BIT, ctrl->val << 4); break; case V4L2_CID_ANALOGUE_GAIN: ret = sc035gs_set_ctrl_gain(sc035gs, ctrl->val); break; case V4L2_CID_VBLANK: ret = sc035gs_write_reg(sc035gs->client, SC035GS_REG_VTS, SC035GS_REG_VALUE_16BIT, ctrl->val + sc035gs->cur_mode->height); if (!ret) sc035gs->cur_vts = ctrl->val + sc035gs->cur_mode->height; sc035gs_modify_fps_info(sc035gs); break; case V4L2_CID_TEST_PATTERN: ret = sc035gs_enable_test_pattern(sc035gs, ctrl->val); 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 sc035gs_ctrl_ops = { .s_ctrl = sc035gs_set_ctrl, }; static int sc035gs_initialize_controls(struct sc035gs *sc035gs) { const struct sc035gs_mode *mode; struct v4l2_ctrl_handler *handler; s64 exposure_max, vblank_def; u32 h_blank; int ret; handler = &sc035gs->ctrl_handler; mode = sc035gs->cur_mode; ret = v4l2_ctrl_handler_init(handler, 8); if (ret) return ret; handler->lock = &sc035gs->mutex; sc035gs->link_freq = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, ARRAY_SIZE(link_freq_menu_items) - 1, 0, link_freq_menu_items); sc035gs->pixel_rate = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0, PIXEL_RATE_WITH_300M, 1, mode->pixel_rate); __v4l2_ctrl_s_ctrl(sc035gs->link_freq, mode->pixel_rate); h_blank = mode->hts_def - mode->width; sc035gs->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, h_blank, h_blank, 1, h_blank); if (sc035gs->hblank) sc035gs->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; vblank_def = mode->vts_def - mode->height; sc035gs->cur_vts = mode->vts_def; sc035gs->cur_fps = mode->max_fps; sc035gs->vblank = v4l2_ctrl_new_std(handler, &sc035gs_ctrl_ops, V4L2_CID_VBLANK, vblank_def, SC035GS_VTS_MAX - mode->height, 1, vblank_def); exposure_max = mode->vts_def - 6; sc035gs->exposure = v4l2_ctrl_new_std(handler, &sc035gs_ctrl_ops, V4L2_CID_EXPOSURE, SC035GS_EXPOSURE_MIN, exposure_max, SC035GS_EXPOSURE_STEP, mode->exp_def); sc035gs->anal_gain = v4l2_ctrl_new_std(handler, &sc035gs_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, ANALOG_GAIN_MIN, ANALOG_GAIN_MAX, ANALOG_GAIN_STEP, ANALOG_GAIN_DEFAULT); sc035gs->test_pattern = v4l2_ctrl_new_std_menu_items(handler, &sc035gs_ctrl_ops, V4L2_CID_TEST_PATTERN, ARRAY_SIZE(sc035gs_test_pattern_menu) - 1, 0, 0, sc035gs_test_pattern_menu); if (handler->error) { ret = handler->error; dev_err(&sc035gs->client->dev, "Failed to init controls(%d)\n", ret); goto err_free_handler; } sc035gs->subdev.ctrl_handler = handler; return 0; err_free_handler: v4l2_ctrl_handler_free(handler); return ret; } static int sc035gs_check_sensor_id(struct sc035gs *sc035gs, struct i2c_client *client) { struct device *dev = &sc035gs->client->dev; u32 id = 0; int ret; ret = sc035gs_read_reg(client, SC132GS_REG_CHIP_ID, SC035GS_REG_VALUE_16BIT, &id); if (ret || id != CHIP_ID) { dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret); return -ENODEV; } dev_info(dev, "Detected SC035GS CHIP ID = 0x%04x sensor\n", CHIP_ID); return 0; } static int sc035gs_configure_regulators(struct sc035gs *sc035gs) { unsigned int i; for (i = 0; i < SC035GS_NUM_SUPPLIES; i++) sc035gs->supplies[i].supply = sc035gs_supply_names[i]; return devm_regulator_bulk_get(&sc035gs->client->dev, SC035GS_NUM_SUPPLIES, sc035gs->supplies); } static int sc035gs_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct device_node *node = dev->of_node; struct sc035gs *sc035gs; 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); sc035gs = devm_kzalloc(dev, sizeof(*sc035gs), GFP_KERNEL); if (!sc035gs) return -ENOMEM; ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX, &sc035gs->module_index); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING, &sc035gs->module_facing); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME, &sc035gs->module_name); ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME, &sc035gs->len_name); if (ret) { dev_err(dev, "could not get module information!\n"); return -EINVAL; } sc035gs->client = client; sc035gs->cur_mode = &supported_modes[0]; sc035gs->xvclk = devm_clk_get(dev, "xvclk"); if (IS_ERR(sc035gs->xvclk)) { dev_err(dev, "Failed to get xvclk\n"); return -EINVAL; } sc035gs->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(sc035gs->reset_gpio)) dev_warn(dev, "Failed to get reset-gpios\n"); sc035gs->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW); if (IS_ERR(sc035gs->pwdn_gpio)) dev_warn(dev, "Failed to get pwdn-gpios\n"); ret = sc035gs_configure_regulators(sc035gs); if (ret) { dev_err(dev, "Failed to get power regulators\n"); return ret; } sc035gs->pinctrl = devm_pinctrl_get(dev); if (!IS_ERR(sc035gs->pinctrl)) { sc035gs->pins_default = pinctrl_lookup_state(sc035gs->pinctrl, OF_CAMERA_PINCTRL_STATE_DEFAULT); if (IS_ERR(sc035gs->pins_default)) dev_err(dev, "could not get default pinstate\n"); sc035gs->pins_sleep = pinctrl_lookup_state(sc035gs->pinctrl, OF_CAMERA_PINCTRL_STATE_SLEEP); if (IS_ERR(sc035gs->pins_sleep)) dev_err(dev, "could not get sleep pinstate\n"); } mutex_init(&sc035gs->mutex); sd = &sc035gs->subdev; v4l2_i2c_subdev_init(sd, client, &sc035gs_subdev_ops); ret = sc035gs_initialize_controls(sc035gs); if (ret) goto err_destroy_mutex; ret = __sc035gs_power_on(sc035gs); if (ret) goto err_free_handler; ret = sc035gs_check_sensor_id(sc035gs, client); if (ret) goto err_power_off; #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API sd->internal_ops = &sc035gs_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; #endif #if defined(CONFIG_MEDIA_CONTROLLER) sc035gs->pad.flags = MEDIA_PAD_FL_SOURCE; sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = media_entity_pads_init(&sd->entity, 1, &sc035gs->pad); if (ret < 0) goto err_power_off; #endif memset(facing, 0, sizeof(facing)); if (strcmp(sc035gs->module_facing, "back") == 0) facing[0] = 'b'; else facing[0] = 'f'; snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s", sc035gs->module_index, facing, SC035GS_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: __sc035gs_power_off(sc035gs); err_free_handler: v4l2_ctrl_handler_free(&sc035gs->ctrl_handler); err_destroy_mutex: mutex_destroy(&sc035gs->mutex); return ret; } static int sc035gs_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct sc035gs *sc035gs = to_sc035gs(sd); v4l2_async_unregister_subdev(sd); #if defined(CONFIG_MEDIA_CONTROLLER) media_entity_cleanup(&sd->entity); #endif v4l2_ctrl_handler_free(&sc035gs->ctrl_handler); mutex_destroy(&sc035gs->mutex); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) __sc035gs_power_off(sc035gs); pm_runtime_set_suspended(&client->dev); return 0; } #if IS_ENABLED(CONFIG_OF) static const struct of_device_id sc035gs_of_match[] = { { .compatible = "smartsens,sc035gs" }, {}, }; MODULE_DEVICE_TABLE(of, sc035gs_of_match); #endif static const struct i2c_device_id sc035gs_match_id[] = { { "smartsens,sc035gs", 0 }, { }, }; static struct i2c_driver sc035gs_i2c_driver = { .driver = { .name = SC035GS_NAME, .pm = &sc035gs_pm_ops, .of_match_table = of_match_ptr(sc035gs_of_match), }, .probe = &sc035gs_probe, .remove = &sc035gs_remove, .id_table = sc035gs_match_id, }; static int __init sensor_mod_init(void) { return i2c_add_driver(&sc035gs_i2c_driver); } static void __exit sensor_mod_exit(void) { i2c_del_driver(&sc035gs_i2c_driver); } device_initcall_sync(sensor_mod_init); module_exit(sensor_mod_exit); MODULE_DESCRIPTION("Smartsens sc035gs sensor driver"); MODULE_LICENSE("GPL");