// SPDX-License-Identifier: GPL-2.0 /* * dw9763 vcm driver * * Copyright (C) 2019 Fuzhou Rockchip Electronics Co., Ltd. */ #include #include #include #include #include #include #include #include #include #include #define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x0) #define DW9763_NAME "dw9763" #define DW9763_RING_PD_CONTROL_REG 0x02 #define DW9763_DATAM_REG 0X03 #define DW9763_DATAL_REG 0X04 #define DW9763_STATUS_ADDR 0x05 #define DW9763_SAC_PRESC_REG 0x06 #define DW9763_SAC_TIME_REG 0x07 #define DW9763_FLAG_REG 0X10 #define DW9763_MAX_CURRENT 100U #define DW9763_MAX_REG 1023U #define DW9763_DEFAULT_START_CURRENT 0 #define DW9763_DEFAULT_RATED_CURRENT 100 #define DW9763_DEFAULT_STEP_MODE 0xd #define REG_NULL 0xFF #define OF_CAMERA_VCMDRV_CONTROL_MODE "rockchip,vcm-control-mode" #define OF_CAMERA_VCMDRV_SACDIV_MODE "rockchip,vcm-sacdiv-mode" #define VCMDRV_DEFAULT_CONTROL_MODE 4 #define VCMDRV_DEFAULT_SACDIV_MODE 1 /* dw9763 device structure */ struct dw9763_device { struct v4l2_ctrl_handler ctrls_vcm; struct v4l2_subdev sd; struct v4l2_device vdev; u16 current_val; 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 control_mode; unsigned int sacdiv_mode; unsigned long mv_time_per_pos; 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; }; 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_read_reg(struct i2c_client *client, u8 addr, u32 *val, u8 len) { 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 *)&addr; /* 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 dw9763_write_reg(struct i2c_client *client, u8 addr, u32 val, u8 len) { u32 buf_i, val_i; u8 buf[5]; u8 *val_p; __be32 val_be; if (len > 4) return -EINVAL; buf[0] = addr & 0xff; 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) return -EIO; return 0; } static int dw9763_get_pos(struct dw9763_device *dev_vcm, unsigned int *cur_pos) { struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd); int ret; u32 val; unsigned int abs_step; ret = dw9763_read_reg(client, DW9763_DATAM_REG, &val, 2); if (ret != 0) goto err; abs_step = val & 0x3ff; 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; dev_dbg(&client->dev, "%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; struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd); 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_write_reg(client, DW9763_DATAM_REG, position & 0x3ff, 2); if (ret != 0) goto err; dev_dbg(&client->dev, "@@@@@@@@ %s: get position %d\n", __func__, position); return ret; err: dev_err(&client->dev, "%s: failed with error %d\n", __func__, ret); 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 = v4l2_get_subdevdata(&dev_vcm->sd); 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 > VCMDRV_MAX_LOG) { dev_info(&client->dev, "%s dest_pos is error. %d > %d\n", __func__, dest_pos, VCMDRV_MAX_LOG); return -EINVAL; } /* calculate move time */ move_pos = dev_vcm->current_related_pos - dest_pos; if (move_pos < 0) move_pos = -move_pos; ret = dw9763_set_pos(dev_vcm, dest_pos); if (dev_vcm->control_mode == 1) dev_vcm->move_us = dev_vcm->mv_time_per_pos * move_pos; else dev_vcm->move_us = dev_vcm->mv_time_per_pos; dev_dbg(&client->dev, "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 dw9763t_init(struct dw9763_device *dev) { int ret = 0; struct i2c_client *client = v4l2_get_subdevdata(&dev->sd); u32 control_mode = 0; u32 step_mode = 0; ret = dw9763_write_reg(client, DW9763_RING_PD_CONTROL_REG, 0x01, 1); if (ret < 0) goto err; ret = dw9763_write_reg(client, DW9763_RING_PD_CONTROL_REG, 0x00, 1); if (ret < 0) goto err; /*There is need a sleep after power on for write i2c*/ usleep_range(10000, 11000); ret = dw9763_write_reg(client, DW9763_RING_PD_CONTROL_REG, 0x02, 1); if (ret < 0) goto err; ret = dw9763_write_reg(client, DW9763_SAC_PRESC_REG, 0x61, 2); if (ret < 0) goto err; ret = dw9763_write_reg(client, DW9763_SAC_TIME_REG, 0x39, 2); if (ret < 0) goto err; dev_info(&client->dev, "enter vcm driver init\n"); /*There is need a sleep after out of standby status*/ msleep(100); /*step_mode = (dev->sacdiv_mode << 6) | (dev->step_mode & 0x3f); ret = dw9763_write_reg(client, DW9763_SACT_REG, step_mode, 1); if (ret < 0) goto err; control_mode = 0x31; control_mode |= (dev->control_mode & 0x07) << 1; ret = dw9763_write_reg(client, DW9763_CONTROL, control_mode, 1); if (ret < 0) goto err; */ dev_info(&client->dev, "dw9763t_init OK!!!\n"); return 0; err: dev_err(&client->dev, "failed with error %d\n", ret); return ret; } 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); rval = pm_runtime_get_sync(sd->dev); if (rval < 0) { pm_runtime_put_noidle(sd->dev); return rval; } rval = dw9763t_init(dev_vcm); if (rval < 0) { pm_runtime_put_noidle(sd->dev); return rval; } return 0; } static int dw9763_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { pm_runtime_put(sd->dev); return 0; } static const struct v4l2_subdev_internal_ops dw9763_int_ops = { .open = dw9763_open, .close = dw9763_close, }; static long dw9763_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { int ret = 0; struct rk_cam_vcm_tim *vcm_tim; struct i2c_client *client = v4l2_get_subdevdata(sd); struct dw9763_device *dw9763_dev = sd_to_dw9763_vcm(sd); // if (cmd == RK_VIDIOC_VCM_TIMEINFO) { vcm_tim = (struct rk_cam_vcm_tim *)arg; vcm_tim->vcm_start_t.tv_sec = dw9763_dev->start_move_tv.tv_sec; vcm_tim->vcm_start_t.tv_usec = dw9763_dev->start_move_tv.tv_usec; vcm_tim->vcm_end_t.tv_sec = dw9763_dev->end_move_tv.tv_sec; vcm_tim->vcm_end_t.tv_usec = dw9763_dev->end_move_tv.tv_usec; dev_dbg(&client->dev, "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 { // 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 rk_cam_vcm_tim vcm_tim; struct rk_cam_compat_vcm_tim compat_vcm_tim; void __user *up = compat_ptr(arg); struct i2c_client *client = v4l2_get_subdevdata(sd); 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 { 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, VCMDRV_MAX_LOG); 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 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; int ret; int current_distance; unsigned int start_current; unsigned int rated_current; unsigned int step_mode; unsigned int control_mode; unsigned int sacdiv_mode; struct v4l2_subdev *sd; char facing[2]; printk("XXXXXXXXXXXXXXX dw9763_probe\n"); dev_info(&client->dev, "probing...\n"); if (of_property_read_u32(np, OF_CAMERA_VCMDRV_START_CURRENT, (unsigned int *)&start_current)) { start_current = 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_current)) { rated_current = 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_CONTROL_MODE, (unsigned int *)&control_mode)) { control_mode = VCMDRV_DEFAULT_CONTROL_MODE; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_CONTROL_MODE); } if (of_property_read_u32(np, OF_CAMERA_VCMDRV_SACDIV_MODE, (unsigned int *)&sacdiv_mode)) { sacdiv_mode = VCMDRV_DEFAULT_SACDIV_MODE; dev_info(&client->dev, "could not get module %s from dts!\n", OF_CAMERA_VCMDRV_SACDIV_MODE); } 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; } 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; 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"); current_distance = rated_current - start_current; current_distance = current_distance * DW9763_MAX_REG / DW9763_MAX_CURRENT; dw9763_dev->step = (current_distance + (VCMDRV_MAX_LOG - 1)) / VCMDRV_MAX_LOG; dw9763_dev->start_current = start_current * DW9763_MAX_REG / DW9763_MAX_CURRENT; dw9763_dev->rated_current = dw9763_dev->start_current + VCMDRV_MAX_LOG * dw9763_dev->step; dw9763_dev->step_mode = step_mode; 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()); switch (control_mode) { case 0: dev_err(&client->dev, "control_mode is derect mode, not support\n"); return -EINVAL; case 1: dw9763_dev->mv_time_per_pos = (126 + step_mode * 2) * dw9763_dev->step; dev_dbg(&client->dev, "control_mode is LSC mode\n"); break; case 2: case 3: case 4: case 5: case 6: case 7: dw9763_dev->mv_time_per_pos = (6300 + step_mode * 100); dev_dbg(&client->dev, "control_mode is LSC mode\n"); break; default: dev_err(&client->dev, "set unknown control_mode\n"); return -EINVAL; } switch (sacdiv_mode) { case 0: dw9763_dev->mv_time_per_pos *= 2; dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode); break; case 1: dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode); break; case 2: dw9763_dev->mv_time_per_pos /= 2; dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode); break; case 3: dw9763_dev->mv_time_per_pos /= 4; dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode); break; default: dev_err(&client->dev, "set unknown control_mode\n"); return -EINVAL; } pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); pm_runtime_idle(&client->dev); dev_info(&client->dev, "probing successful\n"); printk("XXXXXXXXXXXXXXX dw9763_probe OK\n"); return 0; 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 v4l2_subdev *sd = i2c_get_clientdata(client); struct dw9763_device *dw9763_dev = sd_to_dw9763_vcm(sd); pm_runtime_disable(&client->dev); dw9763_subdev_cleanup(dw9763_dev); return 0; } static int __maybe_unused dw9763_vcm_suspend(struct device *dev) { return 0; } static int __maybe_unused dw9763_vcm_resume(struct device *dev) { 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 v2");