// SPDX-License-Identifier: GPL-2.0 /* * dw9800v vcm driver * * Copyright (C) 2023 Rockchip Electronics Co., Ltd. */ //#define DEBUG #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x0) #define DW9800V_NAME "dw9800v" #define DW9800V_MAX_CURRENT 1023U #define DW9800V_MAX_REG 1023U #define DW9800V_GRADUAL_MOVELENS_STEPS 32 #define DW9800V_DEFAULT_START_CURRENT 553 #define DW9800V_DEFAULT_RATED_CURRENT 853 #define DW9800V_DEFAULT_STEP_MODE 0x0 #define DW9800V_DEFAULT_T_SACT 0x10 #define DW9800V_DEFAULT_T_DIV 0x1 #define REG_NULL 0xFF #define DW9800V_ADVMODE_VCM_MSB 0x03 #define DW9800V_ADVMODE_VCM_LSB 0x04 #define DW9800V_ADVMODE_STATUS 0x05 #define DW9800V_CHIP_ID 0xEB #define DW9800V_REG_CHIP_ID 0x00 static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "debug level (0-2)"); enum mode_e { SAC2_MODE, SAC3_MODE, SAC4_MODE, SAC5_MODE, DIRECT_MODE, LSC_MODE, }; /* dw9800v device structure */ struct dw9800v_device { struct v4l2_ctrl_handler ctrls_vcm; struct v4l2_ctrl *focus; struct v4l2_subdev sd; struct v4l2_device vdev; u16 current_val; struct gpio_desc *power_gpio; unsigned short current_related_pos; unsigned short current_lens_pos; unsigned int start_current; unsigned int rated_current; unsigned int step; unsigned int step_mode; unsigned int vcm_movefull_t; unsigned int t_src; unsigned int t_div; unsigned int max_logicalpos; struct __kernel_old_timeval start_move_tv; struct __kernel_old_timeval end_move_tv; unsigned long move_us; u32 module_index; const char *module_facing; struct rk_cam_vcm_cfg vcm_cfg; int max_ma; struct gpio_desc *xsd_gpio; struct regulator *supply; struct i2c_client *client; bool power_on; atomic_t open_cnt; }; static inline struct dw9800v_device *to_dw9800v_vcm(struct v4l2_ctrl *ctrl) { return container_of(ctrl->handler, struct dw9800v_device, ctrls_vcm); } static inline struct dw9800v_device *sd_to_dw9800v_vcm(struct v4l2_subdev *subdev) { return container_of(subdev, struct dw9800v_device, sd); } static int dw9800v_write_reg(struct i2c_client *client, u8 reg, u32 len, u32 val) { u32 buf_i, val_i; u8 buf[5]; u8 *val_p; __be32 val_be; if (len > 4) return -EINVAL; buf[0] = reg; val_be = cpu_to_be32(val); val_p = (u8 *)&val_be; buf_i = 1; val_i = 4 - len; while (val_i < 4) buf[buf_i++] = val_p[val_i++]; if (i2c_master_send(client, buf, len + 1) != len + 1) { dev_err(&client->dev, "Failed to write 0x%04x,0x%x\n", reg, val); return -EIO; } return 0; } static int dw9800v_read_reg(struct i2c_client *client, u8 reg, unsigned int len, u32 *val) { struct i2c_msg msgs[2]; u8 *data_be_p; __be32 data_be = 0; 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 = 1; msgs[0].buf = (u8 *)® /* 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 unsigned int dw9800v_move_time_div(struct dw9800v_device *dev_vcm, unsigned int move_time_us) { struct i2c_client *client = dev_vcm->client; unsigned int move_time = 0; switch (dev_vcm->t_div) { case 0: move_time = move_time_us * 2; break; case 1: move_time = move_time_us; break; case 2: move_time = move_time_us / 2; break; case 3: move_time = move_time_us / 4; break; case 4: move_time = move_time_us * 8; break; case 5: move_time = move_time_us * 4; break; default: dev_err(&client->dev, "%s: t_div parameter err %d\n", __func__, dev_vcm->t_div); break; } return move_time; } static unsigned int dw9800v_move_time(struct dw9800v_device *dev_vcm, unsigned int move_pos) { struct i2c_client *client = dev_vcm->client; unsigned int move_time_us = 0; switch (dev_vcm->step_mode) { case LSC_MODE: move_time_us = 252 + dev_vcm->t_src * 4; move_time_us = move_time_us * move_pos; break; case SAC2_MODE: case SAC3_MODE: case SAC4_MODE: case SAC5_MODE: move_time_us = 6300 + dev_vcm->t_src * 100; move_time_us = dw9800v_move_time_div(dev_vcm, move_time_us); break; case DIRECT_MODE: move_time_us = 30000; break; default: dev_err(&client->dev, "%s: step_mode is error %d\n", __func__, dev_vcm->step_mode); break; } dev_info(&client->dev, "%s: vcm_movefull_t is: %d us\n", __func__, move_time_us); return move_time_us; } static int dw9800v_set_dac(struct dw9800v_device *dev_vcm, unsigned int dest_dac) { struct i2c_client *client = dev_vcm->client; int ret; unsigned int i; bool vcm_idle = false; /* wait for I2C bus idle */ vcm_idle = false; for (i = 0; i < 10; i++) { unsigned int status = 0; dw9800v_read_reg(client, DW9800V_ADVMODE_STATUS, 1, &status); status &= 0x01; if (status == 0) { vcm_idle = true; break; } usleep_range(1000, 1200); } if (!vcm_idle) { dev_err(&client->dev, "%s: watting 0x05 flag timeout!\n", __func__); return -ETIMEDOUT; } /* vcm move */ ret = dw9800v_write_reg(client, DW9800V_ADVMODE_VCM_MSB, 2, dest_dac); if (ret != 0) goto err; return ret; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); return ret; } static int dw9800v_get_pos(struct dw9800v_device *dev_vcm, unsigned int *cur_pos) { struct i2c_client *client = dev_vcm->client; int ret; unsigned int dac, abs_step; ret = dw9800v_read_reg(client, 0x03, 2, &dac); if (ret != 0) goto err; if (dac <= dev_vcm->start_current) abs_step = dev_vcm->max_logicalpos; else if ((dac > dev_vcm->start_current) && (dac <= dev_vcm->rated_current)) abs_step = (dev_vcm->rated_current - dac) / dev_vcm->step; else abs_step = 0; *cur_pos = abs_step; v4l2_dbg(1, debug, &dev_vcm->sd, "%s: get position %d, dac %d\n", __func__, *cur_pos, dac); return 0; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); return ret; } static int dw9800v_set_pos(struct dw9800v_device *dev_vcm, unsigned int dest_pos) { int ret; unsigned int position = 0; struct i2c_client *client = dev_vcm->client; u32 is_busy, i; if (dest_pos >= dev_vcm->max_logicalpos) position = dev_vcm->start_current; else position = dev_vcm->start_current + (dev_vcm->step * (dev_vcm->max_logicalpos - dest_pos)); if (position > DW9800V_MAX_REG) position = DW9800V_MAX_REG; dev_vcm->current_lens_pos = position; dev_vcm->current_related_pos = dest_pos; for (i = 0; i < 100; i++) { ret = dw9800v_read_reg(client, 0x05, 1, &is_busy); if (!ret && !(is_busy & 0x01)) break; usleep_range(100, 200); } ret = dw9800v_write_reg(client, 0x03, 2, dev_vcm->current_lens_pos); if (ret != 0) goto err; v4l2_dbg(1, debug, &dev_vcm->sd, "%s: set position %d, dac %d\n", __func__, dest_pos, position); return ret; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); return ret; } static int dw9800v_get_ctrl(struct v4l2_ctrl *ctrl) { struct dw9800v_device *dev_vcm = to_dw9800v_vcm(ctrl); if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) return dw9800v_get_pos(dev_vcm, &ctrl->val); return -EINVAL; } static int dw9800v_set_ctrl(struct v4l2_ctrl *ctrl) { struct dw9800v_device *dev_vcm = to_dw9800v_vcm(ctrl); struct i2c_client *client = dev_vcm->client; unsigned int dest_pos = ctrl->val; int move_pos; long mv_us; int ret = 0; if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) { if (dest_pos > dev_vcm->max_logicalpos) { dev_info(&client->dev, "%s dest_pos is error. %d > %d\n", __func__, dest_pos, dev_vcm->max_logicalpos); return -EINVAL; } /* calculate move time */ move_pos = dev_vcm->current_related_pos - dest_pos; if (move_pos < 0) move_pos = -move_pos; ret = dw9800v_set_pos(dev_vcm, dest_pos); if (dev_vcm->step_mode == LSC_MODE) dev_vcm->move_us = ((dev_vcm->vcm_movefull_t * (uint32_t)move_pos) / dev_vcm->max_logicalpos); else dev_vcm->move_us = dev_vcm->vcm_movefull_t; v4l2_dbg(1, debug, &dev_vcm->sd, "dest_pos %d, move_us %ld\n", dest_pos, dev_vcm->move_us); dev_vcm->start_move_tv = ns_to_kernel_old_timeval(ktime_get_ns()); mv_us = dev_vcm->start_move_tv.tv_usec + dev_vcm->move_us; if (mv_us >= 1000000) { dev_vcm->end_move_tv.tv_sec = dev_vcm->start_move_tv.tv_sec + 1; dev_vcm->end_move_tv.tv_usec = mv_us - 1000000; } else { dev_vcm->end_move_tv.tv_sec = dev_vcm->start_move_tv.tv_sec; dev_vcm->end_move_tv.tv_usec = mv_us; } } return ret; } static const struct v4l2_ctrl_ops dw9800v_vcm_ctrl_ops = { .g_volatile_ctrl = dw9800v_get_ctrl, .s_ctrl = dw9800v_set_ctrl, }; static int dw9800v_init(struct i2c_client *client); static int dw9800v_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { int rval; struct dw9800v_device *dev_vcm = sd_to_dw9800v_vcm(sd); unsigned int move_time; int dac = dev_vcm->start_current; struct i2c_client *client = dev_vcm->client; #ifdef CONFIG_PM v4l2_info(sd, "%s: enter, power.usage_count(%d)!\n", __func__, atomic_read(&sd->dev->power.usage_count)); #endif rval = pm_runtime_get_sync(sd->dev); if (rval < 0) { pm_runtime_put_noidle(sd->dev); return rval; } if (dev_vcm->power_on && atomic_inc_return(&dev_vcm->open_cnt) == 1) { dw9800v_init(client); usleep_range(1000, 1200); v4l2_dbg(1, debug, sd, "%s: current_lens_pos %d, current_related_pos %d\n", __func__, dev_vcm->current_lens_pos, dev_vcm->current_related_pos); move_time = dw9800v_move_time(dev_vcm, DW9800V_GRADUAL_MOVELENS_STEPS); while (dac <= dev_vcm->current_lens_pos) { dw9800v_set_dac(dev_vcm, dac); usleep_range(move_time, move_time + 1000); dac += DW9800V_GRADUAL_MOVELENS_STEPS; if (dac >= dev_vcm->current_lens_pos) break; } if (dac > dev_vcm->current_lens_pos) { dac = dev_vcm->current_lens_pos; dw9800v_set_dac(dev_vcm, dac); } } #ifdef CONFIG_PM v4l2_info(sd, "%s: exit, power.usage_count(%d)!\n", __func__, atomic_read(&sd->dev->power.usage_count)); #endif return 0; } static int dw9800v_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct dw9800v_device *dev_vcm = sd_to_dw9800v_vcm(sd); int dac = dev_vcm->current_lens_pos; unsigned int move_time; struct i2c_client *client = v4l2_get_subdevdata(sd); #ifdef CONFIG_PM v4l2_info(sd, "%s: enter, power.usage_count(%d)!\n", __func__, atomic_read(&sd->dev->power.usage_count)); #endif if (dev_vcm->power_on && atomic_dec_return(&dev_vcm->open_cnt) == 0) { v4l2_dbg(1, debug, sd, "%s: current_lens_pos %d, current_related_pos %d\n", __func__, dev_vcm->current_lens_pos, dev_vcm->current_related_pos); move_time = dw9800v_move_time(dev_vcm, DW9800V_GRADUAL_MOVELENS_STEPS); while (dac >= DW9800V_GRADUAL_MOVELENS_STEPS) { dw9800v_set_dac(dev_vcm, dac); usleep_range(move_time, move_time + 1000); dac -= DW9800V_GRADUAL_MOVELENS_STEPS; if (dac <= 0) break; } if (dac < DW9800V_GRADUAL_MOVELENS_STEPS) { dac = DW9800V_GRADUAL_MOVELENS_STEPS; dw9800v_set_dac(dev_vcm, dac); } /* set to power down mode */ dw9800v_write_reg(client, 0x02, 1, 0x01); } pm_runtime_put(sd->dev); #ifdef CONFIG_PM v4l2_info(sd, "%s: exit, power.usage_count(%d)!\n", __func__, atomic_read(&sd->dev->power.usage_count)); #endif return 0; } static const struct v4l2_subdev_internal_ops dw9800v_int_ops = { .open = dw9800v_open, .close = dw9800v_close, }; static void dw9800v_update_vcm_cfg(struct dw9800v_device *dev_vcm) { struct i2c_client *client = dev_vcm->client; int cur_dist; if (dev_vcm->max_ma == 0) { dev_err(&client->dev, "max current is zero"); return; } cur_dist = dev_vcm->vcm_cfg.rated_ma - dev_vcm->vcm_cfg.start_ma; cur_dist = cur_dist * DW9800V_MAX_REG / dev_vcm->max_ma; dev_vcm->step = (cur_dist + (dev_vcm->max_logicalpos - 1)) / dev_vcm->max_logicalpos; dev_vcm->start_current = dev_vcm->vcm_cfg.start_ma * DW9800V_MAX_REG / dev_vcm->max_ma; dev_vcm->rated_current = dev_vcm->vcm_cfg.rated_ma * DW9800V_MAX_REG / dev_vcm->max_ma; dev_vcm->step_mode = dev_vcm->vcm_cfg.step_mode; v4l2_dbg(1, debug, &dev_vcm->sd, "vcm_cfg: %d, %d, %d, max_ma %d\n", dev_vcm->vcm_cfg.start_ma, dev_vcm->vcm_cfg.rated_ma, dev_vcm->vcm_cfg.step_mode, dev_vcm->max_ma); } static long dw9800v_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct dw9800v_device *dev_vcm = sd_to_dw9800v_vcm(sd); struct i2c_client *client = dev_vcm->client; struct rk_cam_vcm_tim *vcm_tim; struct rk_cam_vcm_cfg *vcm_cfg; unsigned int max_logicalpos; int ret = 0; if (cmd == RK_VIDIOC_VCM_TIMEINFO) { vcm_tim = (struct rk_cam_vcm_tim *)arg; vcm_tim->vcm_start_t.tv_sec = dev_vcm->start_move_tv.tv_sec; vcm_tim->vcm_start_t.tv_usec = dev_vcm->start_move_tv.tv_usec; vcm_tim->vcm_end_t.tv_sec = dev_vcm->end_move_tv.tv_sec; vcm_tim->vcm_end_t.tv_usec = dev_vcm->end_move_tv.tv_usec; v4l2_dbg(1, debug, sd, "dw9800v_get_move_res 0x%lx, 0x%lx, 0x%lx, 0x%lx\n", vcm_tim->vcm_start_t.tv_sec, vcm_tim->vcm_start_t.tv_usec, vcm_tim->vcm_end_t.tv_sec, vcm_tim->vcm_end_t.tv_usec); } else if (cmd == RK_VIDIOC_GET_VCM_CFG) { vcm_cfg = (struct rk_cam_vcm_cfg *)arg; vcm_cfg->start_ma = dev_vcm->vcm_cfg.start_ma; vcm_cfg->rated_ma = dev_vcm->vcm_cfg.rated_ma; vcm_cfg->step_mode = dev_vcm->vcm_cfg.step_mode; } else if (cmd == RK_VIDIOC_SET_VCM_CFG) { vcm_cfg = (struct rk_cam_vcm_cfg *)arg; if (vcm_cfg->start_ma == 0 && vcm_cfg->rated_ma == 0) { dev_err(&client->dev, "vcm_cfg err, start_ma %d, rated_ma %d\n", vcm_cfg->start_ma, vcm_cfg->rated_ma); return -EINVAL; } if (vcm_cfg->rated_ma > DW9800V_MAX_CURRENT) { dev_warn(&client->dev, "vcm_cfg use dac value, do convert!\n"); vcm_cfg->rated_ma = vcm_cfg->rated_ma * dev_vcm->max_ma / DW9800V_MAX_REG; vcm_cfg->start_ma = vcm_cfg->start_ma * dev_vcm->max_ma / DW9800V_MAX_REG; } dev_vcm->vcm_cfg.start_ma = vcm_cfg->start_ma; dev_vcm->vcm_cfg.rated_ma = vcm_cfg->rated_ma; dev_vcm->vcm_cfg.step_mode = vcm_cfg->step_mode; dw9800v_update_vcm_cfg(dev_vcm); } else if (cmd == RK_VIDIOC_SET_VCM_MAX_LOGICALPOS) { max_logicalpos = *(unsigned int *)arg; if (max_logicalpos > 0) { dev_vcm->max_logicalpos = max_logicalpos; __v4l2_ctrl_modify_range(dev_vcm->focus, 0, dev_vcm->max_logicalpos, 1, dev_vcm->max_logicalpos); } v4l2_dbg(1, debug, &dev_vcm->sd, "max_logicalpos %d\n", max_logicalpos); } else { dev_err(&client->dev, "cmd 0x%x not supported\n", cmd); return -EINVAL; } return ret; } #ifdef CONFIG_COMPAT static long dw9800v_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd, unsigned long arg) { struct dw9800v_device *dev_vcm = sd_to_dw9800v_vcm(sd); struct i2c_client *client = dev_vcm->client; void __user *up = compat_ptr(arg); struct rk_cam_compat_vcm_tim compat_vcm_tim; struct rk_cam_vcm_tim vcm_tim; struct rk_cam_vcm_cfg vcm_cfg; unsigned int max_logicalpos; long ret; if (cmd == RK_VIDIOC_COMPAT_VCM_TIMEINFO) { struct rk_cam_compat_vcm_tim __user *p32 = up; ret = dw9800v_ioctl(sd, RK_VIDIOC_VCM_TIMEINFO, &vcm_tim); compat_vcm_tim.vcm_start_t.tv_sec = vcm_tim.vcm_start_t.tv_sec; compat_vcm_tim.vcm_start_t.tv_usec = vcm_tim.vcm_start_t.tv_usec; compat_vcm_tim.vcm_end_t.tv_sec = vcm_tim.vcm_end_t.tv_sec; compat_vcm_tim.vcm_end_t.tv_usec = vcm_tim.vcm_end_t.tv_usec; put_user(compat_vcm_tim.vcm_start_t.tv_sec, &p32->vcm_start_t.tv_sec); put_user(compat_vcm_tim.vcm_start_t.tv_usec, &p32->vcm_start_t.tv_usec); put_user(compat_vcm_tim.vcm_end_t.tv_sec, &p32->vcm_end_t.tv_sec); put_user(compat_vcm_tim.vcm_end_t.tv_usec, &p32->vcm_end_t.tv_usec); } else if (cmd == RK_VIDIOC_GET_VCM_CFG) { ret = dw9800v_ioctl(sd, RK_VIDIOC_GET_VCM_CFG, &vcm_cfg); if (!ret) { ret = copy_to_user(up, &vcm_cfg, sizeof(vcm_cfg)); if (ret) ret = -EFAULT; } } else if (cmd == RK_VIDIOC_SET_VCM_CFG) { ret = copy_from_user(&vcm_cfg, up, sizeof(vcm_cfg)); if (!ret) ret = dw9800v_ioctl(sd, cmd, &vcm_cfg); else ret = -EFAULT; } else if (cmd == RK_VIDIOC_SET_VCM_MAX_LOGICALPOS) { ret = copy_from_user(&max_logicalpos, up, sizeof(max_logicalpos)); if (!ret) ret = dw9800v_ioctl(sd, cmd, &max_logicalpos); else ret = -EFAULT; } else { dev_err(&client->dev, "cmd 0x%x not supported\n", cmd); return -EINVAL; } return ret; } #endif static const struct v4l2_subdev_core_ops dw9800v_core_ops = { .ioctl = dw9800v_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = dw9800v_compat_ioctl32 #endif }; static const struct v4l2_subdev_ops dw9800v_ops = { .core = &dw9800v_core_ops, }; static void dw9800v_subdev_cleanup(struct dw9800v_device *dw9800v_dev) { v4l2_device_unregister_subdev(&dw9800v_dev->sd); v4l2_device_unregister(&dw9800v_dev->vdev); v4l2_ctrl_handler_free(&dw9800v_dev->ctrls_vcm); media_entity_cleanup(&dw9800v_dev->sd.entity); } static int dw9800v_init_controls(struct dw9800v_device *dev_vcm) { struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm; const struct v4l2_ctrl_ops *ops = &dw9800v_vcm_ctrl_ops; v4l2_ctrl_handler_init(hdl, 1); dev_vcm->focus = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE, 0, dev_vcm->max_logicalpos, 1, 0); if (hdl->error) dev_err(dev_vcm->sd.dev, "%s fail error: 0x%x\n", __func__, hdl->error); dev_vcm->sd.ctrl_handler = hdl; return hdl->error; } static int __dw9800v_set_power(struct dw9800v_device *dw9800v, bool on) { struct i2c_client *client = dw9800v->client; int ret = 0; dev_info(&client->dev, "%s(%d) on(%d)\n", __func__, __LINE__, on); if (dw9800v->power_on == !!on) goto unlock_and_return; if (on) { ret = regulator_enable(dw9800v->supply); if (ret < 0) { dev_err(&client->dev, "Failed to enable regulator\n"); goto unlock_and_return; } dw9800v->power_on = true; } else { ret = regulator_disable(dw9800v->supply); if (ret < 0) { dev_err(&client->dev, "Failed to disable regulator\n"); goto unlock_and_return; } dw9800v->power_on = false; } unlock_and_return: return ret; } static int dw9800v_check_id(struct dw9800v_device *dw9800v_dev) { int ret = 0; unsigned int pid = 0x00; struct i2c_client *client = dw9800v_dev->client; struct device *dev = &client->dev; __dw9800v_set_power(dw9800v_dev, true); ret = dw9800v_read_reg(client, DW9800V_REG_CHIP_ID, 1, &pid); if (pid != DW9800V_CHIP_ID) { dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", pid, ret); return -ENODEV; } dev_info(&dw9800v_dev->client->dev, "Detected dw9800v vcm id:0x%x\n", DW9800V_CHIP_ID); return 0; } static int dw9800v_probe_init(struct i2c_client *client) { int ret = 0; /* Default goto power down mode when finished probe */ ret = dw9800v_write_reg(client, 0x02, 1, 0x01); if (ret) goto err; return 0; err: dev_err(&client->dev, "probe init failed with error %d\n", ret); return -1; } static int dw9800v_configure_regulator(struct dw9800v_device *dw9800v) { struct i2c_client *client = dw9800v->client; int ret = 0; dw9800v->supply = devm_regulator_get(&client->dev, "avdd"); if (IS_ERR(dw9800v->supply)) { ret = PTR_ERR(dw9800v->supply); if (ret != -EPROBE_DEFER) dev_err(&client->dev, "could not get regulator avdd\n"); return ret; } dw9800v->power_on = false; return ret; } static int dw9800v_parse_dt_property(struct i2c_client *client, struct dw9800v_device *dev_vcm) { struct device_node *np = of_node_get(client->dev.of_node); int ret; if (of_property_read_u32(np, OF_CAMERA_VCMDRV_MAX_CURRENT, (unsigned int *)&dev_vcm->max_ma)) { dev_vcm->max_ma = DW9800V_MAX_CURRENT; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_MAX_CURRENT); } if (dev_vcm->max_ma == 0) dev_vcm->max_ma = DW9800V_MAX_CURRENT; if (of_property_read_u32(np, OF_CAMERA_VCMDRV_START_CURRENT, (unsigned int *)&dev_vcm->vcm_cfg.start_ma)) { dev_vcm->vcm_cfg.start_ma = DW9800V_DEFAULT_START_CURRENT; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_START_CURRENT); } if (of_property_read_u32(np, OF_CAMERA_VCMDRV_RATED_CURRENT, (unsigned int *)&dev_vcm->vcm_cfg.rated_ma)) { dev_vcm->vcm_cfg.rated_ma = DW9800V_DEFAULT_RATED_CURRENT; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_RATED_CURRENT); } if (of_property_read_u32(np, OF_CAMERA_VCMDRV_STEP_MODE, (unsigned int *)&dev_vcm->vcm_cfg.step_mode)) { dev_vcm->vcm_cfg.step_mode = DW9800V_DEFAULT_STEP_MODE; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_STEP_MODE); } if (of_property_read_u32(np, OF_CAMERA_VCMDRV_T_SRC, (unsigned int *)&dev_vcm->t_src)) { dev_vcm->t_src = DW9800V_DEFAULT_T_SACT; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_T_SRC); } if (of_property_read_u32(np, OF_CAMERA_VCMDRV_T_DIV, (unsigned int *)&dev_vcm->t_div)) { dev_vcm->t_div = DW9800V_DEFAULT_T_DIV; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_T_DIV); } dev_vcm->xsd_gpio = devm_gpiod_get(&client->dev, "xsd", GPIOD_OUT_HIGH); if (IS_ERR(dev_vcm->xsd_gpio)) dev_warn(&client->dev, "Failed to get xsd-gpios\n"); ret = of_property_read_u32(np, RKMODULE_CAMERA_MODULE_INDEX, &dev_vcm->module_index); ret |= of_property_read_string(np, RKMODULE_CAMERA_MODULE_FACING, &dev_vcm->module_facing); if (ret) { dev_err(&client->dev, "could not get module information!\n"); return -EINVAL; } dev_vcm->client = client; ret = dw9800v_configure_regulator(dev_vcm); if (ret) { dev_err(&client->dev, "Failed to get power regulator!\n"); return ret; } dev_info(&client->dev, "current: %d, %d, %d, t_div: %d, t_src: %d, step_mode: %d", dev_vcm->max_ma, dev_vcm->start_current, dev_vcm->rated_current, dev_vcm->t_div, dev_vcm->t_src, dev_vcm->vcm_cfg.step_mode); return 0; } static int dw9800v_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct dw9800v_device *dw9800v_dev; struct v4l2_subdev *sd; char facing[2]; int ret; dev_info(&client->dev, "probing...\n"); dw9800v_dev = devm_kzalloc(&client->dev, sizeof(*dw9800v_dev), GFP_KERNEL); if (dw9800v_dev == NULL) return -ENOMEM; ret = dw9800v_parse_dt_property(client, dw9800v_dev); if (ret) return ret; dw9800v_dev->client = client; ret = dw9800v_check_id(dw9800v_dev); if (ret) goto err_power_off; /* enter power down mode */ dw9800v_probe_init(client); v4l2_i2c_subdev_init(&dw9800v_dev->sd, client, &dw9800v_ops); dw9800v_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; dw9800v_dev->sd.internal_ops = &dw9800v_int_ops; dw9800v_dev->max_logicalpos = VCMDRV_MAX_LOG; ret = dw9800v_init_controls(dw9800v_dev); if (ret) goto err_cleanup; ret = media_entity_pads_init(&dw9800v_dev->sd.entity, 0, NULL); if (ret < 0) goto err_cleanup; sd = &dw9800v_dev->sd; sd->entity.function = MEDIA_ENT_F_LENS; memset(facing, 0, sizeof(facing)); if (strcmp(dw9800v_dev->module_facing, "back") == 0) facing[0] = 'b'; else facing[0] = 'f'; snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s", dw9800v_dev->module_index, facing, DW9800V_NAME, dev_name(sd->dev)); ret = v4l2_async_register_subdev(sd); if (ret) dev_err(&client->dev, "v4l2 async register subdev failed\n"); dw9800v_update_vcm_cfg(dw9800v_dev); dw9800v_dev->move_us = 0; dw9800v_dev->current_related_pos = VCMDRV_MAX_LOG; dw9800v_dev->start_move_tv = ns_to_kernel_old_timeval(ktime_get_ns()); dw9800v_dev->end_move_tv = ns_to_kernel_old_timeval(ktime_get_ns()); i2c_set_clientdata(client, dw9800v_dev); dw9800v_dev->vcm_movefull_t = dw9800v_move_time(dw9800v_dev, DW9800V_MAX_REG); atomic_set(&dw9800v_dev->open_cnt, 0); pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); pm_runtime_idle(&client->dev); dev_info(&client->dev, "probing successful\n"); return 0; err_cleanup: dw9800v_subdev_cleanup(dw9800v_dev); err_power_off: __dw9800v_set_power(dw9800v_dev, false); dev_err(&client->dev, "Probe failed: %d\n", ret); return ret; } static void dw9800v_remove(struct i2c_client *client) { struct dw9800v_device *dw9800v_dev = i2c_get_clientdata(client); pm_runtime_disable(&client->dev); dw9800v_subdev_cleanup(dw9800v_dev); } static int dw9800v_init(struct i2c_client *client) { struct dw9800v_device *dev_vcm = i2c_get_clientdata(client); int ret = 0; u32 ring = 0; u32 mode_val = 0; u32 algo_time = 0; /* Delay 200us~300us */ usleep_range(200, 300); ret = dw9800v_write_reg(client, 0x02, 1, 0x00); if (ret) goto err; usleep_range(100, 200); if (dev_vcm->step_mode != DIRECT_MODE && dev_vcm->step_mode != LSC_MODE) ring = 0x02; ret = dw9800v_write_reg(client, 0x02, 1, ring); if (ret) goto err; switch (dev_vcm->step_mode) { case SAC2_MODE: case SAC3_MODE: case SAC4_MODE: case SAC5_MODE: mode_val |= dev_vcm->step_mode << 6; break; case LSC_MODE: mode_val |= 0x80; break; default: break; } mode_val |= ((dev_vcm->t_div >> 2) & 0x01); algo_time = dev_vcm->t_div << 6 | dev_vcm->t_src; ret = dw9800v_write_reg(client, 0x06, 1, mode_val); if (ret) goto err; ret = dw9800v_write_reg(client, 0x07, 1, algo_time); if (ret) goto err; usleep_range(100, 200); return 0; err: dev_err(&client->dev, "init failed with error %d\n", ret); return -1; } static int __maybe_unused dw9800v_vcm_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct dw9800v_device *dev_vcm = i2c_get_clientdata(client); struct v4l2_subdev *sd = &dev_vcm->sd; #ifdef CONFIG_PM v4l2_dbg(1, debug, sd, "%s: enter, power.usage_count(%d)!\n", __func__, atomic_read(&sd->dev->power.usage_count)); #endif __dw9800v_set_power(dev_vcm, false); return 0; } static int __maybe_unused dw9800v_vcm_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct dw9800v_device *dev_vcm = i2c_get_clientdata(client); struct v4l2_subdev *sd = &dev_vcm->sd; #ifdef CONFIG_PM v4l2_dbg(1, debug, sd, "%s: enter, power.usage_count(%d)!\n", __func__, atomic_read(&sd->dev->power.usage_count)); #endif __dw9800v_set_power(dev_vcm, true); return 0; } static const struct i2c_device_id dw9800v_id_table[] = { { DW9800V_NAME, 0 }, { { 0 } } }; MODULE_DEVICE_TABLE(i2c, dw9800v_id_table); static const struct of_device_id dw9800v_of_table[] = { { .compatible = "dongwoon,dw9800v" }, { { 0 } } }; MODULE_DEVICE_TABLE(of, dw9800v_of_table); static const struct dev_pm_ops dw9800v_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(dw9800v_vcm_suspend, dw9800v_vcm_resume) SET_RUNTIME_PM_OPS(dw9800v_vcm_suspend, dw9800v_vcm_resume, NULL) }; static struct i2c_driver dw9800v_i2c_driver = { .driver = { .name = DW9800V_NAME, .pm = &dw9800v_pm_ops, .of_match_table = dw9800v_of_table, }, .probe = &dw9800v_probe, .remove = &dw9800v_remove, .id_table = dw9800v_id_table, }; module_i2c_driver(dw9800v_i2c_driver); MODULE_DESCRIPTION("DW9800V VCM driver"); MODULE_LICENSE("GPL");