// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2018 Fuzhou Rockchip Electronics Co., Ltd.
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/rk-camera-module.h>
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#include <linux/version.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <linux/rk_vcm_head.h>
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#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x0)
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#define VM149C_NAME "vm149c"
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#define VM149C_MAX_CURRENT 100U
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#define VM149C_MAX_REG 1023U
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#define VM149C_DEFAULT_START_CURRENT 0
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#define VM149C_DEFAULT_RATED_CURRENT 100
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#define VM149C_DEFAULT_STEP_MODE 4
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/* vm149c device structure */
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struct vm149c_device {
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struct v4l2_ctrl_handler ctrls_vcm;
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struct v4l2_subdev sd;
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struct v4l2_device vdev;
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u16 current_val;
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unsigned short current_related_pos;
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unsigned short current_lens_pos;
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unsigned int start_current;
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unsigned int rated_current;
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unsigned int step;
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unsigned int step_mode;
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unsigned int vcm_movefull_t;
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struct timeval start_move_tv;
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struct timeval end_move_tv;
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unsigned long move_ms;
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u32 module_index;
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const char *module_facing;
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struct rk_cam_vcm_cfg vcm_cfg;
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int max_ma;
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};
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static inline struct vm149c_device *to_vm149c_vcm(struct v4l2_ctrl *ctrl)
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{
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return container_of(ctrl->handler, struct vm149c_device, ctrls_vcm);
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}
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static inline struct vm149c_device *sd_to_vm149c_vcm(struct v4l2_subdev *subdev)
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{
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return container_of(subdev, struct vm149c_device, sd);
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}
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static int vm149c_read_msg(
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struct i2c_client *client,
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unsigned char *msb, unsigned char *lsb)
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{
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int ret = 0;
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struct i2c_msg msg[1];
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unsigned char data[2];
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int retries;
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if (!client->adapter) {
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dev_err(&client->dev, "client->adapter NULL\n");
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return -ENODEV;
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}
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for (retries = 0; retries < 5; retries++) {
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msg->addr = client->addr;
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msg->flags = 1;
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msg->len = 2;
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msg->buf = data;
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ret = i2c_transfer(client->adapter, msg, 1);
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if (ret == 1) {
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dev_dbg(&client->dev,
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"%s: vcm i2c ok, addr 0x%x, data 0x%x, 0x%x\n",
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__func__, msg->addr, data[0], data[1]);
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*msb = data[0];
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*lsb = data[1];
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return 0;
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}
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dev_info(&client->dev,
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"retrying I2C... %d\n", retries);
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retries++;
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(msecs_to_jiffies(20));
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}
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dev_err(&client->dev,
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"%s: i2c write to failed with error %d\n", __func__, ret);
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return ret;
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}
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static int vm149c_write_msg(
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struct i2c_client *client,
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u8 msb, u8 lsb)
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{
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int ret = 0;
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struct i2c_msg msg[1];
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unsigned char data[2];
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int retries;
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if (!client->adapter) {
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dev_err(&client->dev, "client->adapter NULL\n");
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return -ENODEV;
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}
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for (retries = 0; retries < 5; retries++) {
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msg->addr = client->addr;
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msg->flags = 0;
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msg->len = 2;
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msg->buf = data;
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data[0] = msb;
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data[1] = lsb;
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ret = i2c_transfer(client->adapter, msg, 1);
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usleep_range(50, 100);
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if (ret == 1) {
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dev_dbg(&client->dev,
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"%s: vcm i2c ok, addr 0x%x, data 0x%x, 0x%x\n",
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__func__, msg->addr, data[0], data[1]);
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return 0;
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}
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dev_info(&client->dev,
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"retrying I2C... %d\n", retries);
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retries++;
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(msecs_to_jiffies(20));
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}
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dev_err(&client->dev,
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"i2c write to failed with error %d\n", ret);
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return ret;
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}
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static int vm149c_get_pos(
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struct vm149c_device *dev_vcm,
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unsigned int *cur_pos)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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int ret = 0;
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unsigned char lsb = 0;
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unsigned char msb = 0;
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unsigned int abs_step = 0;
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ret = vm149c_read_msg(client, &msb, &lsb);
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if (ret != 0)
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goto err;
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abs_step = (((unsigned int)(msb & 0x3FU)) << 4U) |
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(((unsigned int)lsb) >> 4U);
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if (abs_step <= dev_vcm->start_current)
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abs_step = VCMDRV_MAX_LOG;
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else if ((abs_step > dev_vcm->start_current) &&
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(abs_step <= dev_vcm->rated_current))
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abs_step = (dev_vcm->rated_current - abs_step) / dev_vcm->step;
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else
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abs_step = 0;
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*cur_pos = abs_step;
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dev_dbg(&client->dev, "%s: get position %d\n", __func__, *cur_pos);
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return 0;
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err:
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dev_err(&client->dev,
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"%s: failed with error %d\n", __func__, ret);
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return ret;
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}
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static int vm149c_set_pos(
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struct vm149c_device *dev_vcm,
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unsigned int dest_pos)
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{
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int ret = 0;
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unsigned char lsb = 0;
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unsigned char msb = 0;
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unsigned int position = 0;
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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if (dest_pos >= VCMDRV_MAX_LOG)
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position = dev_vcm->start_current;
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else
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position = dev_vcm->start_current +
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(dev_vcm->step * (VCMDRV_MAX_LOG - dest_pos));
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if (position > VM149C_MAX_REG)
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position = VM149C_MAX_REG;
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dev_vcm->current_lens_pos = position;
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dev_vcm->current_related_pos = dest_pos;
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msb = (0x00U | ((dev_vcm->current_lens_pos & 0x3F0U) >> 4U));
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lsb = (((dev_vcm->current_lens_pos & 0x0FU) << 4U) |
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dev_vcm->step_mode);
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ret = vm149c_write_msg(client, msb, lsb);
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if (ret != 0)
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goto err;
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return ret;
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err:
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dev_err(&client->dev,
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"%s: failed with error %d\n", __func__, ret);
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return ret;
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}
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static int vm149c_get_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct vm149c_device *dev_vcm = to_vm149c_vcm(ctrl);
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if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE)
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return vm149c_get_pos(dev_vcm, &ctrl->val);
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return -EINVAL;
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}
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static int vm149c_set_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct vm149c_device *dev_vcm = to_vm149c_vcm(ctrl);
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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unsigned int dest_pos = ctrl->val;
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int move_pos;
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long int mv_us;
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int ret = 0;
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if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
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if (dest_pos > VCMDRV_MAX_LOG) {
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dev_info(&client->dev,
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"%s dest_pos is error. %d > %d\n",
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__func__, dest_pos, VCMDRV_MAX_LOG);
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return -EINVAL;
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}
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/* calculate move time */
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move_pos = dev_vcm->current_related_pos - dest_pos;
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if (move_pos < 0)
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move_pos = -move_pos;
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ret = vm149c_set_pos(dev_vcm, dest_pos);
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dev_vcm->move_ms =
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((dev_vcm->vcm_movefull_t *
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(uint32_t)move_pos) /
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VCMDRV_MAX_LOG);
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dev_dbg(&client->dev, "dest_pos %d, move_ms %ld\n",
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dest_pos, dev_vcm->move_ms);
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dev_vcm->start_move_tv = ns_to_timeval(ktime_get_ns());
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mv_us = dev_vcm->start_move_tv.tv_usec +
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dev_vcm->move_ms * 1000;
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if (mv_us >= 1000000) {
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dev_vcm->end_move_tv.tv_sec =
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dev_vcm->start_move_tv.tv_sec + 1;
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dev_vcm->end_move_tv.tv_usec = mv_us - 1000000;
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} else {
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dev_vcm->end_move_tv.tv_sec =
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dev_vcm->start_move_tv.tv_sec;
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dev_vcm->end_move_tv.tv_usec = mv_us;
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}
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}
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return ret;
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}
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static const struct v4l2_ctrl_ops vm149c_vcm_ctrl_ops = {
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.g_volatile_ctrl = vm149c_get_ctrl,
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.s_ctrl = vm149c_set_ctrl,
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};
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static int vm149c_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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{
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int rval;
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rval = pm_runtime_get_sync(sd->dev);
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if (rval < 0) {
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pm_runtime_put_noidle(sd->dev);
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return rval;
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}
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return 0;
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}
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static int vm149c_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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{
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pm_runtime_put(sd->dev);
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return 0;
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}
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static const struct v4l2_subdev_internal_ops vm149c_int_ops = {
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.open = vm149c_open,
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.close = vm149c_close,
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};
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static void vm149c_update_vcm_cfg(struct vm149c_device *dev_vcm)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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int cur_dist;
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if (dev_vcm->max_ma == 0) {
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dev_err(&client->dev, "max current is zero");
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return;
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}
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cur_dist = dev_vcm->vcm_cfg.rated_ma - dev_vcm->vcm_cfg.start_ma;
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cur_dist = cur_dist * VM149C_MAX_REG / dev_vcm->max_ma;
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dev_vcm->step = (cur_dist + (VCMDRV_MAX_LOG - 1)) / VCMDRV_MAX_LOG;
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dev_vcm->start_current = dev_vcm->vcm_cfg.start_ma *
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VM149C_MAX_REG / dev_vcm->max_ma;
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dev_vcm->rated_current = dev_vcm->start_current +
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VCMDRV_MAX_LOG * dev_vcm->step;
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dev_vcm->step_mode = dev_vcm->vcm_cfg.step_mode;
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dev_dbg(&client->dev,
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"vcm_cfg: %d, %d, %d, max_ma %d\n",
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dev_vcm->vcm_cfg.start_ma,
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dev_vcm->vcm_cfg.rated_ma,
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dev_vcm->vcm_cfg.step_mode,
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dev_vcm->max_ma);
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}
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static long vm149c_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct vm149c_device *vm149c_dev = sd_to_vm149c_vcm(sd);
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struct rk_cam_vcm_tim *vcm_tim;
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struct rk_cam_vcm_cfg *vcm_cfg;
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int ret = 0;
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if (cmd == RK_VIDIOC_VCM_TIMEINFO) {
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vcm_tim = (struct rk_cam_vcm_tim *)arg;
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vcm_tim->vcm_start_t.tv_sec = vm149c_dev->start_move_tv.tv_sec;
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vcm_tim->vcm_start_t.tv_usec = vm149c_dev->start_move_tv.tv_usec;
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vcm_tim->vcm_end_t.tv_sec = vm149c_dev->end_move_tv.tv_sec;
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vcm_tim->vcm_end_t.tv_usec = vm149c_dev->end_move_tv.tv_usec;
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dev_dbg(&client->dev, "vm149c_get_move_res 0x%lx, 0x%lx, 0x%lx, 0x%lx\n",
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vcm_tim->vcm_start_t.tv_sec, vcm_tim->vcm_start_t.tv_usec,
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vcm_tim->vcm_end_t.tv_sec, vcm_tim->vcm_end_t.tv_usec);
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} else if (cmd == RK_VIDIOC_GET_VCM_CFG) {
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vcm_cfg = (struct rk_cam_vcm_cfg *)arg;
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vcm_cfg->start_ma = vm149c_dev->vcm_cfg.start_ma;
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vcm_cfg->rated_ma = vm149c_dev->vcm_cfg.rated_ma;
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vcm_cfg->step_mode = vm149c_dev->vcm_cfg.step_mode;
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} else if (cmd == RK_VIDIOC_SET_VCM_CFG) {
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vcm_cfg = (struct rk_cam_vcm_cfg *)arg;
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vm149c_dev->vcm_cfg.start_ma = vcm_cfg->start_ma;
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vm149c_dev->vcm_cfg.rated_ma = vcm_cfg->rated_ma;
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vm149c_dev->vcm_cfg.step_mode = vcm_cfg->step_mode;
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vm149c_update_vcm_cfg(vm149c_dev);
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} else {
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dev_err(&client->dev,
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"cmd 0x%x not supported\n", cmd);
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return -EINVAL;
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}
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return ret;
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}
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#ifdef CONFIG_COMPAT
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static long vm149c_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd, unsigned long arg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct rk_cam_compat_vcm_tim __user *p32 = compat_ptr(arg);
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struct rk_cam_compat_vcm_tim compat_vcm_tim;
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struct rk_cam_vcm_tim vcm_tim;
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struct rk_cam_vcm_cfg vcm_cfg;
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long ret;
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if (cmd == RK_VIDIOC_COMPAT_VCM_TIMEINFO) {
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ret = vm149c_ioctl(sd, RK_VIDIOC_VCM_TIMEINFO, &vcm_tim);
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compat_vcm_tim.vcm_start_t.tv_sec = vcm_tim.vcm_start_t.tv_sec;
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compat_vcm_tim.vcm_start_t.tv_usec = vcm_tim.vcm_start_t.tv_usec;
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compat_vcm_tim.vcm_end_t.tv_sec = vcm_tim.vcm_end_t.tv_sec;
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compat_vcm_tim.vcm_end_t.tv_usec = vcm_tim.vcm_end_t.tv_usec;
|
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put_user(compat_vcm_tim.vcm_start_t.tv_sec, &p32->vcm_start_t.tv_sec);
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put_user(compat_vcm_tim.vcm_start_t.tv_usec, &p32->vcm_start_t.tv_usec);
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put_user(compat_vcm_tim.vcm_end_t.tv_sec, &p32->vcm_end_t.tv_sec);
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put_user(compat_vcm_tim.vcm_end_t.tv_usec, &p32->vcm_end_t.tv_usec);
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} else if (cmd == RK_VIDIOC_GET_VCM_CFG) {
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ret = vm149c_ioctl(sd, RK_VIDIOC_GET_VCM_CFG, &vcm_cfg);
|
if (!ret)
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ret = copy_to_user(up, &vcm_cfg, sizeof(vcm_cfg));
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} else if (cmd == RK_VIDIOC_SET_VCM_CFG) {
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ret = copy_from_user(&vcm_cfg, up, sizeof(vcm_cfg));
|
if (!ret)
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ret = vm149c_ioctl(sd, cmd, &vcm_cfg);
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} else {
|
dev_err(&client->dev,
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"cmd 0x%x not supported\n", cmd);
|
return -EINVAL;
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}
|
|
return ret;
|
}
|
#endif
|
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static const struct v4l2_subdev_core_ops vm149c_core_ops = {
|
.ioctl = vm149c_ioctl,
|
#ifdef CONFIG_COMPAT
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.compat_ioctl32 = vm149c_compat_ioctl32
|
#endif
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};
|
|
static const struct v4l2_subdev_ops vm149c_ops = {
|
.core = &vm149c_core_ops,
|
};
|
|
static void vm149c_subdev_cleanup(struct vm149c_device *vm149c_dev)
|
{
|
v4l2_device_unregister_subdev(&vm149c_dev->sd);
|
v4l2_device_unregister(&vm149c_dev->vdev);
|
v4l2_ctrl_handler_free(&vm149c_dev->ctrls_vcm);
|
media_entity_cleanup(&vm149c_dev->sd.entity);
|
}
|
|
static int vm149c_init_controls(struct vm149c_device *dev_vcm)
|
{
|
struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
|
const struct v4l2_ctrl_ops *ops = &vm149c_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 vm149c_probe(struct i2c_client *client,
|
const struct i2c_device_id *id)
|
{
|
struct device_node *np = of_node_get(client->dev.of_node);
|
struct vm149c_device *vm149c_dev;
|
unsigned int max_ma, start_ma, rated_ma, step_mode;
|
struct v4l2_subdev *sd;
|
char facing[2];
|
int ret;
|
|
dev_info(&client->dev, "probing...\n");
|
dev_info(&client->dev, "driver version: %02x.%02x.%02x",
|
DRIVER_VERSION >> 16,
|
(DRIVER_VERSION & 0xff00) >> 8,
|
DRIVER_VERSION & 0x00ff);
|
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_MAX_CURRENT,
|
(unsigned int *)&max_ma)) {
|
max_ma = VM149C_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 = VM149C_MAX_CURRENT;
|
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_START_CURRENT,
|
(unsigned int *)&start_ma)) {
|
start_ma = VM149C_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 = VM149C_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 = VM149C_DEFAULT_STEP_MODE;
|
dev_info(&client->dev,
|
"could not get module %s from dts!\n",
|
OF_CAMERA_VCMDRV_STEP_MODE);
|
}
|
|
vm149c_dev = devm_kzalloc(&client->dev, sizeof(*vm149c_dev),
|
GFP_KERNEL);
|
if (vm149c_dev == NULL)
|
return -ENOMEM;
|
|
ret = of_property_read_u32(np, RKMODULE_CAMERA_MODULE_INDEX,
|
&vm149c_dev->module_index);
|
ret |= of_property_read_string(np, RKMODULE_CAMERA_MODULE_FACING,
|
&vm149c_dev->module_facing);
|
if (ret) {
|
dev_err(&client->dev,
|
"could not get module information!\n");
|
return -EINVAL;
|
}
|
|
v4l2_i2c_subdev_init(&vm149c_dev->sd, client, &vm149c_ops);
|
vm149c_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
vm149c_dev->sd.internal_ops = &vm149c_int_ops;
|
|
ret = vm149c_init_controls(vm149c_dev);
|
if (ret)
|
goto err_cleanup;
|
|
ret = media_entity_pads_init(&vm149c_dev->sd.entity, 0, NULL);
|
if (ret < 0)
|
goto err_cleanup;
|
|
sd = &vm149c_dev->sd;
|
sd->entity.function = MEDIA_ENT_F_LENS;
|
|
memset(facing, 0, sizeof(facing));
|
if (strcmp(vm149c_dev->module_facing, "back") == 0)
|
facing[0] = 'b';
|
else
|
facing[0] = 'f';
|
|
snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
|
vm149c_dev->module_index, facing,
|
VM149C_NAME, dev_name(sd->dev));
|
ret = v4l2_async_register_subdev(sd);
|
if (ret)
|
dev_err(&client->dev, "v4l2 async register subdev failed\n");
|
|
vm149c_dev->max_ma = max_ma;
|
vm149c_dev->vcm_cfg.start_ma = start_ma;
|
vm149c_dev->vcm_cfg.rated_ma = rated_ma;
|
vm149c_dev->vcm_cfg.step_mode = step_mode;
|
vm149c_update_vcm_cfg(vm149c_dev);
|
vm149c_dev->move_ms = 0;
|
vm149c_dev->current_related_pos = VCMDRV_MAX_LOG;
|
vm149c_dev->start_move_tv = ns_to_timeval(ktime_get_ns());
|
vm149c_dev->end_move_tv = ns_to_timeval(ktime_get_ns());
|
if ((vm149c_dev->step_mode & 0x0c) != 0) {
|
vm149c_dev->vcm_movefull_t =
|
64 * (1 << (vm149c_dev->step_mode & 0x03)) * 1024 /
|
((1 << (((vm149c_dev->step_mode & 0x0c) >> 2) - 1)) * 1000);
|
} else {
|
vm149c_dev->vcm_movefull_t = 64 * 1023 / 1000;
|
}
|
|
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:
|
vm149c_subdev_cleanup(vm149c_dev);
|
dev_err(&client->dev, "Probe failed: %d\n", ret);
|
return ret;
|
}
|
|
static int vm149c_remove(struct i2c_client *client)
|
{
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct vm149c_device *vm149c_dev = sd_to_vm149c_vcm(sd);
|
|
pm_runtime_disable(&client->dev);
|
vm149c_subdev_cleanup(vm149c_dev);
|
|
return 0;
|
}
|
|
static int __maybe_unused vm149c_vcm_suspend(struct device *dev)
|
{
|
return 0;
|
}
|
|
static int __maybe_unused vm149c_vcm_resume(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct vm149c_device *vm149c_dev = sd_to_vm149c_vcm(sd);
|
|
vm149c_set_pos(vm149c_dev, vm149c_dev->current_related_pos);
|
return 0;
|
}
|
|
static const struct i2c_device_id vm149c_id_table[] = {
|
{ VM149C_NAME, 0 },
|
{ { 0 } }
|
};
|
MODULE_DEVICE_TABLE(i2c, vm149c_id_table);
|
|
static const struct of_device_id vm149c_of_table[] = {
|
{ .compatible = "silicon touch,vm149c" },
|
{ { 0 } }
|
};
|
MODULE_DEVICE_TABLE(of, vm149c_of_table);
|
|
static const struct dev_pm_ops vm149c_pm_ops = {
|
SET_SYSTEM_SLEEP_PM_OPS(vm149c_vcm_suspend, vm149c_vcm_resume)
|
SET_RUNTIME_PM_OPS(vm149c_vcm_suspend, vm149c_vcm_resume, NULL)
|
};
|
|
static struct i2c_driver vm149c_i2c_driver = {
|
.driver = {
|
.name = VM149C_NAME,
|
.pm = &vm149c_pm_ops,
|
.of_match_table = vm149c_of_table,
|
},
|
.probe = &vm149c_probe,
|
.remove = &vm149c_remove,
|
.id_table = vm149c_id_table,
|
};
|
|
module_i2c_driver(vm149c_i2c_driver);
|
|
MODULE_DESCRIPTION("VM149C VCM driver");
|
MODULE_LICENSE("GPL v2");
|
