// SPDX-License-Identifier: GPL-2.0 /* * dw9763 vcm driver * * Copyright (C) 2022 Rockchip Electronics Co., Ltd. */ // #define DEBUG #include #include #include #include #include #include #include #include #include #include #include #define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x1) #define DW9763_NAME "dw9763" #define DW9763_MAX_CURRENT 120U #define DW9763_MAX_REG 1023U #define DW9763_GRADUAL_MOVELENS_STEPS 32 #define DW9763_DEFAULT_START_CURRENT 20 #define DW9763_DEFAULT_RATED_CURRENT 90 #define DW9763_DEFAULT_STEP_MODE 0x3 #define DW9763_DEFAULT_T_SACT 0x20 #define DW9763_DEFAULT_T_DIV 0x1 #define REG_NULL 0xFF #define DW9763_CHIP_ID 0xF9 #define DW9763_REG_CHIP_ID 0x00 enum mode_e { SAC1_MODE, SAC2_MODE, SAC2_5_MODE, SAC3_MODE, SAC4_MODE = 5, DIRECT_MODE, }; static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "debug level (0-2)"); /* dw9763 device structure */ struct dw9763_device { struct v4l2_ctrl_handler ctrls_vcm; struct i2c_client *client; 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; 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 mutex lock; struct regulator *supply; bool power_on; }; static inline struct dw9763_device *to_dw9763_vcm(struct v4l2_ctrl *ctrl) { return container_of(ctrl->handler, struct dw9763_device, ctrls_vcm); } static inline struct dw9763_device *sd_to_dw9763_vcm(struct v4l2_subdev *subdev) { return container_of(subdev, struct dw9763_device, sd); } static int dw9763_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; struct dw9763_device *dev_vcm = i2c_get_clientdata(client); 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; } v4l2_dbg(1, debug, &dev_vcm->sd, "succeed to write 0x%04x,0x%x\n", reg, val); return 0; } static int dw9763_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; struct dw9763_device *dev_vcm = i2c_get_clientdata(client); 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); v4l2_dbg(1, debug, &dev_vcm->sd, "succeed to read 0x%04x,0x%x\n", reg, *val); return 0; } static unsigned int dw9763_move_time_div(struct dw9763_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); move_time = move_time_us; break; } return move_time; } static unsigned int dw9763_move_time(struct dw9763_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 SAC1_MODE: case SAC2_MODE: case SAC2_5_MODE: case SAC3_MODE: case SAC4_MODE: move_time_us = 6300 + dev_vcm->t_src * 100; move_time_us = dw9763_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; } v4l2_dbg(1, debug, &dev_vcm->sd, "%s: vcm_movefull_t is: %d us\n", __func__, move_time_us); return ((move_time_us + 500) / 1000); } static int dw9763_set_dac(struct dw9763_device *dev_vcm, unsigned int dest_dac) { struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd); int ret; u32 is_busy, i; for (i = 0; i < 10; i++) { ret = dw9763_read_reg(client, 0x05, 1, &is_busy); if (!ret && !(is_busy & 0x01)) break; usleep_range(100, 200); } ret = dw9763_write_reg(client, 0x03, 2, dest_dac); if (ret != 0) goto err; v4l2_dbg(1, debug, &dev_vcm->sd, "%s: set reg val %d\n", __func__, dest_dac); return ret; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); return ret; } static int dw9763_get_dac(struct dw9763_device *dev_vcm, unsigned int *cur_dac) { struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd); int ret; unsigned int abs_step; ret = dw9763_read_reg(client, 0x03, 2, &abs_step); if (ret != 0) goto err; *cur_dac = abs_step; v4l2_dbg(1, debug, &dev_vcm->sd, "%s: get dac %d\n", __func__, *cur_dac); return 0; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); return ret; } static int dw9763_get_pos(struct dw9763_device *dev_vcm, unsigned int *cur_pos) { struct i2c_client *client = dev_vcm->client; int ret; unsigned int abs_step; ret = dw9763_read_reg(client, 0x03, 2, &abs_step); if (ret != 0) goto err; if (abs_step <= dev_vcm->start_current) abs_step = VCMDRV_MAX_LOG; else if ((abs_step > dev_vcm->start_current) && (abs_step <= dev_vcm->rated_current)) abs_step = (dev_vcm->rated_current - abs_step) / dev_vcm->step; else abs_step = 0; *cur_pos = abs_step; v4l2_dbg(1, debug, &dev_vcm->sd, "%s: get position %d\n", __func__, *cur_pos); return 0; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); return ret; } static int dw9763_set_pos(struct dw9763_device *dev_vcm, unsigned int dest_pos) { int ret; unsigned int position = 0; if (dest_pos >= VCMDRV_MAX_LOG) position = dev_vcm->start_current; else position = dev_vcm->start_current + (dev_vcm->step * (VCMDRV_MAX_LOG - dest_pos)); if (position > DW9763_MAX_REG) position = DW9763_MAX_REG; dev_vcm->current_lens_pos = position; dev_vcm->current_related_pos = dest_pos; ret = dw9763_set_dac(dev_vcm, position); v4l2_dbg(1, debug, &dev_vcm->sd, "%s: set position %d, dac %d\n", __func__, dest_pos, position); return ret; } static int dw9763_get_ctrl(struct v4l2_ctrl *ctrl) { struct dw9763_device *dev_vcm = to_dw9763_vcm(ctrl); if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) return dw9763_get_pos(dev_vcm, &ctrl->val); return -EINVAL; } static int dw9763_set_ctrl(struct v4l2_ctrl *ctrl) { struct dw9763_device *dev_vcm = to_dw9763_vcm(ctrl); struct i2c_client *client = dev_vcm->client; unsigned int dest_pos = ctrl->val; long mv_us; int ret = 0; v4l2_dbg(1, debug, &dev_vcm->sd, "ctrl->id: 0x%x, ctrl->val: 0x%x\n", ctrl->id, ctrl->val); if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) { if (dest_pos > VCMDRV_MAX_LOG) { dev_info(&client->dev, "%s dest_pos is error. %d > %d\n", __func__, dest_pos, VCMDRV_MAX_LOG); return -EINVAL; } ret = dw9763_set_pos(dev_vcm, dest_pos); dev_vcm->move_us = dev_vcm->vcm_movefull_t * 1000; 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 dw9763_vcm_ctrl_ops = { .g_volatile_ctrl = dw9763_get_ctrl, .s_ctrl = dw9763_set_ctrl, }; static int dw9763_init(struct i2c_client *client); static int dw9763_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { int rval; struct dw9763_device *dev_vcm = sd_to_dw9763_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; } dw9763_init(client); 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 = 1000 * dw9763_move_time(dev_vcm, DW9763_GRADUAL_MOVELENS_STEPS); while (dac <= dev_vcm->current_lens_pos) { dw9763_set_dac(dev_vcm, dac); usleep_range(move_time, move_time + 100); dac += DW9763_GRADUAL_MOVELENS_STEPS; if (dac > dev_vcm->current_lens_pos) break; } if (dac > dev_vcm->current_lens_pos) { dac = dev_vcm->current_lens_pos; dw9763_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 dw9763_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct dw9763_device *dev_vcm = sd_to_dw9763_vcm(sd); int dac = dev_vcm->current_lens_pos; unsigned int move_time; int ret; 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 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); dac -= DW9763_GRADUAL_MOVELENS_STEPS; move_time = 1000 * dw9763_move_time(dev_vcm, DW9763_GRADUAL_MOVELENS_STEPS); while (dac >= DW9763_GRADUAL_MOVELENS_STEPS) { dw9763_set_dac(dev_vcm, dac); usleep_range(move_time, move_time + 1000); dac -= DW9763_GRADUAL_MOVELENS_STEPS; if (dac <= 0) break; } if (dac < DW9763_GRADUAL_MOVELENS_STEPS) { dac = DW9763_GRADUAL_MOVELENS_STEPS / 2; dw9763_set_dac(dev_vcm, dac); } /* set to power down mode */ ret = dw9763_write_reg(client, 0x02, 1, 0x01); if (ret) dev_err(&client->dev, "failed to set power down mode!\n"); 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 dw9763_int_ops = { .open = dw9763_open, .close = dw9763_close, }; static void dw9763_update_vcm_cfg(struct dw9763_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 * DW9763_MAX_REG / dev_vcm->max_ma; dev_vcm->step = (cur_dist + (VCMDRV_MAX_LOG - 1)) / VCMDRV_MAX_LOG; dev_vcm->start_current = dev_vcm->vcm_cfg.start_ma * DW9763_MAX_REG / dev_vcm->max_ma; dev_vcm->rated_current = dev_vcm->vcm_cfg.rated_ma * DW9763_MAX_REG / dev_vcm->max_ma; dev_vcm->step_mode = dev_vcm->vcm_cfg.step_mode; dev_info(&client->dev, "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 dw9763_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct dw9763_device *dev_vcm = sd_to_dw9763_vcm(sd); struct i2c_client *client = dev_vcm->client; struct rk_cam_vcm_tim *vcm_tim; struct rk_cam_vcm_cfg *vcm_cfg; 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, &dev_vcm->sd, "dw9763_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; } 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; dw9763_update_vcm_cfg(dev_vcm); } else { dev_err(&client->dev, "cmd 0x%x not supported\n", cmd); return -EINVAL; } return ret; } #ifdef CONFIG_COMPAT static long dw9763_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd, unsigned long arg) { struct dw9763_device *dev_vcm = sd_to_dw9763_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; long ret; if (cmd == RK_VIDIOC_COMPAT_VCM_TIMEINFO) { struct rk_cam_compat_vcm_tim __user *p32 = up; ret = dw9763_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 = dw9763_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 = dw9763_ioctl(sd, cmd, &vcm_cfg); 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 dw9763_core_ops = { .ioctl = dw9763_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = dw9763_compat_ioctl32 #endif }; static const struct v4l2_subdev_ops dw9763_ops = { .core = &dw9763_core_ops, }; static void dw9763_subdev_cleanup(struct dw9763_device *dw9763_dev) { v4l2_device_unregister_subdev(&dw9763_dev->sd); v4l2_device_unregister(&dw9763_dev->vdev); v4l2_ctrl_handler_free(&dw9763_dev->ctrls_vcm); media_entity_cleanup(&dw9763_dev->sd.entity); } static int dw9763_init_controls(struct dw9763_device *dev_vcm) { struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm; const struct v4l2_ctrl_ops *ops = &dw9763_vcm_ctrl_ops; v4l2_ctrl_handler_init(hdl, 1); v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE, 0, VCMDRV_MAX_LOG, 1, 32); 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; } #define USED_SYS_DEBUG #ifdef USED_SYS_DEBUG static ssize_t set_dacval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct dw9763_device *dev_vcm = sd_to_dw9763_vcm(sd); int val = 0; int ret = 0; ret = kstrtoint(buf, 0, &val); if (!ret) dw9763_set_dac(dev_vcm, val); return count; } static ssize_t get_dacval(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct dw9763_device *dev_vcm = sd_to_dw9763_vcm(sd); unsigned int dac = 0; dw9763_get_dac(dev_vcm, &dac); return sprintf(buf, "%u\n", dac); } static struct device_attribute attributes[] = { __ATTR(dacval, 0600, get_dacval, set_dacval), }; static int add_sysfs_interfaces(struct device *dev) { int i; for (i = 0; i < ARRAY_SIZE(attributes); i++) if (device_create_file(dev, attributes + i)) goto undo; return 0; undo: for (i--; i >= 0 ; i--) device_remove_file(dev, attributes + i); dev_err(dev, "%s: failed to create sysfs interface\n", __func__); return -ENODEV; } static int remove_sysfs_interfaces(struct device *dev) { int i; for (i = 0; i < ARRAY_SIZE(attributes); i++) device_remove_file(dev, attributes + i); return 0; } #else static inline int add_sysfs_interfaces(struct device *dev) { return 0; } static inline int remove_sysfs_interfaces(struct device *dev) { return 0; } #endif static int __dw9763_set_power(struct dw9763_device *dw9763, bool on) { struct i2c_client *client = dw9763->client; int ret = 0; dev_info(&client->dev, "%s(%d) on(%d)\n", __func__, __LINE__, on); if (dw9763->power_on == !!on) goto unlock_and_return; if (on) { ret = regulator_enable(dw9763->supply); if (ret < 0) { dev_err(&client->dev, "Failed to enable regulator\n"); goto unlock_and_return; } dw9763->power_on = true; } else { ret = regulator_disable(dw9763->supply); if (ret < 0) { dev_err(&client->dev, "Failed to disable regulator\n"); goto unlock_and_return; } dw9763->power_on = false; } unlock_and_return: return ret; } static int dw9763_configure_regulator(struct dw9763_device *dw9763) { struct i2c_client *client = dw9763->client; int ret = 0; dw9763->supply = devm_regulator_get(&client->dev, "avdd"); if (IS_ERR(dw9763->supply)) { ret = PTR_ERR(dw9763->supply); if (ret != -EPROBE_DEFER) dev_err(&client->dev, "could not get regulator avdd\n"); return ret; } dw9763->power_on = false; return ret; } static int __maybe_unused dw9763_check_id(struct dw9763_device *dw9763_dev) { int ret = 0; unsigned int pid = 0x00; struct i2c_client *client = dw9763_dev->client; struct device *dev = &client->dev; __dw9763_set_power(dw9763_dev, true); ret = dw9763_read_reg(client, DW9763_REG_CHIP_ID, 1, &pid); if (pid != DW9763_CHIP_ID) { dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", pid, ret); return -ENODEV; } dev_info(&dw9763_dev->client->dev, "Detected dw9763 vcm id:0x%x\n", DW9763_CHIP_ID); return 0; } static int dw9763_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device_node *np = of_node_get(client->dev.of_node); struct dw9763_device *dw9763_dev; unsigned int max_ma, start_ma, rated_ma, step_mode; unsigned int t_src, t_div; struct v4l2_subdev *sd; char facing[2]; int ret; dev_info(&client->dev, "probing...\n"); if (of_property_read_u32(np, OF_CAMERA_VCMDRV_MAX_CURRENT, (unsigned int *)&max_ma)) { max_ma = DW9763_MAX_CURRENT; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_MAX_CURRENT); } if (max_ma == 0) max_ma = DW9763_MAX_CURRENT; if (of_property_read_u32(np, OF_CAMERA_VCMDRV_START_CURRENT, (unsigned int *)&start_ma)) { start_ma = DW9763_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 *)&rated_ma)) { rated_ma = DW9763_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 *)&step_mode)) { step_mode = DW9763_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 *)&t_src)) { t_src = DW9763_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 *)&t_div)) { t_div = DW9763_DEFAULT_T_DIV; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_T_DIV); } dw9763_dev = devm_kzalloc(&client->dev, sizeof(*dw9763_dev), GFP_KERNEL); if (dw9763_dev == NULL) return -ENOMEM; ret = of_property_read_u32(np, RKMODULE_CAMERA_MODULE_INDEX, &dw9763_dev->module_index); ret |= of_property_read_string(np, RKMODULE_CAMERA_MODULE_FACING, &dw9763_dev->module_facing); if (ret) { dev_err(&client->dev, "could not get module information!\n"); return -EINVAL; } dw9763_dev->client = client; dw9763_dev->power_gpio = devm_gpiod_get(&client->dev, "power", GPIOD_OUT_LOW); if (IS_ERR(dw9763_dev->power_gpio)) { dw9763_dev->power_gpio = NULL; dev_warn(&client->dev, "Failed to get power-gpios, maybe no use\n"); } ret = dw9763_configure_regulator(dw9763_dev); if (ret) { dev_err(&client->dev, "Failed to get power regulator!\n"); return ret; } v4l2_i2c_subdev_init(&dw9763_dev->sd, client, &dw9763_ops); dw9763_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; dw9763_dev->sd.internal_ops = &dw9763_int_ops; ret = dw9763_init_controls(dw9763_dev); if (ret) goto err_cleanup; ret = media_entity_pads_init(&dw9763_dev->sd.entity, 0, NULL); if (ret < 0) goto err_cleanup; ret = dw9763_check_id(dw9763_dev); if (ret) goto err_power_off; sd = &dw9763_dev->sd; sd->entity.function = MEDIA_ENT_F_LENS; memset(facing, 0, sizeof(facing)); if (strcmp(dw9763_dev->module_facing, "back") == 0) facing[0] = 'b'; else facing[0] = 'f'; snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s", dw9763_dev->module_index, facing, DW9763_NAME, dev_name(sd->dev)); ret = v4l2_async_register_subdev(sd); if (ret) dev_err(&client->dev, "v4l2 async register subdev failed\n"); dw9763_dev->max_ma = max_ma; dw9763_dev->vcm_cfg.start_ma = start_ma; dw9763_dev->vcm_cfg.rated_ma = rated_ma; dw9763_dev->vcm_cfg.step_mode = step_mode; dw9763_update_vcm_cfg(dw9763_dev); dw9763_dev->move_us = 0; dw9763_dev->current_related_pos = VCMDRV_MAX_LOG; dw9763_dev->start_move_tv = ns_to_kernel_old_timeval(ktime_get_ns()); dw9763_dev->end_move_tv = ns_to_kernel_old_timeval(ktime_get_ns()); dw9763_dev->t_src = t_src; dw9763_dev->t_div = t_div; i2c_set_clientdata(client, dw9763_dev); mutex_init(&dw9763_dev->lock); dw9763_dev->vcm_movefull_t = dw9763_move_time(dw9763_dev, DW9763_MAX_REG); pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); pm_runtime_idle(&client->dev); add_sysfs_interfaces(&client->dev); dev_info(&client->dev, "probing successful\n"); return 0; err_power_off: __dw9763_set_power(dw9763_dev, false); err_cleanup: dw9763_subdev_cleanup(dw9763_dev); dev_err(&client->dev, "Probe failed: %d\n", ret); return ret; } static int dw9763_remove(struct i2c_client *client) { struct dw9763_device *dw9763_dev = i2c_get_clientdata(client); remove_sysfs_interfaces(&client->dev); mutex_destroy(&dw9763_dev->lock); pm_runtime_disable(&client->dev); dw9763_subdev_cleanup(dw9763_dev); return 0; } static int dw9763_init(struct i2c_client *client) { struct dw9763_device *dev_vcm = i2c_get_clientdata(client); int ret = 0; u32 mode_val = 0; u32 algo_time = 0; if (dev_vcm->step_mode == DIRECT_MODE) return 0; ret = dw9763_write_reg(client, 0x02, 1, 0x00); if (ret) goto err; usleep_range(200, 300); ret = dw9763_write_reg(client, 0x02, 1, 0x02); if (ret) goto err; switch (dev_vcm->step_mode) { case SAC1_MODE: case SAC2_MODE: case SAC2_5_MODE: case SAC3_MODE: case SAC4_MODE: mode_val |= dev_vcm->step_mode << 5; break; default: break; } mode_val |= (dev_vcm->t_div & 0x07); algo_time = dev_vcm->t_src; ret = dw9763_write_reg(client, 0x06, 1, mode_val); if (ret) goto err; ret = dw9763_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 dw9763_vcm_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct dw9763_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 __dw9763_set_power(dev_vcm, false); return 0; } static int __maybe_unused dw9763_vcm_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct dw9763_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 __dw9763_set_power(dev_vcm, true); return 0; } static const struct i2c_device_id dw9763_id_table[] = { { DW9763_NAME, 0 }, { { 0 } } }; MODULE_DEVICE_TABLE(i2c, dw9763_id_table); static const struct of_device_id dw9763_of_table[] = { { .compatible = "dongwoon,dw9763" }, { { 0 } } }; MODULE_DEVICE_TABLE(of, dw9763_of_table); static const struct dev_pm_ops dw9763_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(dw9763_vcm_suspend, dw9763_vcm_resume) SET_RUNTIME_PM_OPS(dw9763_vcm_suspend, dw9763_vcm_resume, NULL) }; static struct i2c_driver dw9763_i2c_driver = { .driver = { .name = DW9763_NAME, .pm = &dw9763_pm_ops, .of_match_table = dw9763_of_table, }, .probe = &dw9763_probe, .remove = &dw9763_remove, .id_table = dw9763_id_table, }; module_i2c_driver(dw9763_i2c_driver); MODULE_DESCRIPTION("DW9763 VCM driver"); MODULE_LICENSE("GPL");