From 5ad14fc5e54101280e58f0dc9026366539abe6b5 Mon Sep 17 00:00:00 2001 From: Hu Kejun Date: Mon, 9 Jul 2018 20:52:21 +0800 Subject: [PATCH] media: i2c: add vm149c driver Change-Id: Ifcb8027907be60807794e659316ad5211f51ff6d Signed-off-by: Hu Kejun --- drivers/media/i2c/Kconfig | 9 + drivers/media/i2c/Makefile | 2 + drivers/media/i2c/rk_vcm_head.h | 39 +++ drivers/media/i2c/vm149c.c | 545 ++++++++++++++++++++++++++++++++ 4 files changed, 595 insertions(+) create mode 100644 drivers/media/i2c/rk_vcm_head.h create mode 100644 drivers/media/i2c/vm149c.c diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 351b6ed16279..2a0d9512f44a 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -819,6 +819,15 @@ config VIDEO_UPD64083 To compile this driver as a module, choose M here: the module will be called upd64083. +comment "Camera lens devices" + +config VIDEO_VM149C + tristate "VM149C lens voice coil support" + depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER + depends on VIDEO_V4L2_SUBDEV_API + ---help--- + This is a driver for the VM149C camera lens voice coil. + comment "Audio/Video compression chips" config VIDEO_SAA6752HS diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index bb56f89e91e5..377e7ab0e5d7 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -92,3 +92,5 @@ obj-$(CONFIG_VIDEO_GC0312) += gc0312.o obj-$(CONFIG_VIDEO_GC2145) += gc2145.o obj-$(CONFIG_VIDEO_GC0329) += gc0329.o obj-$(CONFIG_VIDEO_GC2035) += gc2035.o + +obj-$(CONFIG_VIDEO_VM149C) += vm149c.o diff --git a/drivers/media/i2c/rk_vcm_head.h b/drivers/media/i2c/rk_vcm_head.h new file mode 100644 index 000000000000..7ddf5d232150 --- /dev/null +++ b/drivers/media/i2c/rk_vcm_head.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018 Fuzhou Rockchip Electronics Co., Ltd. */ + +#ifndef RK_VCM_HEAD_H +#define RK_VCM_HEAD_H + +/* + * Focus position values: + * 65 logical positions ( 0 - 64 ) + * where 64 is the setting for infinity and 0 for macro + */ +#define VCMDRV_MAX_LOG 64U + +#define OF_CAMERA_VCMDRV_START_CURRENT "rockchip,vcm-start-current" +#define OF_CAMERA_VCMDRV_RATED_CURRENT "rockchip,vcm-rated-current" +#define OF_CAMERA_VCMDRV_STEP_MODE "rockchip,vcm-step-mode" + +#define RK_VIDIOC_VCM_TIMEINFO \ + _IOR('V', BASE_VIDIOC_PRIVATE + 0, struct rk_cam_vcm_tim) + +#ifdef CONFIG_COMPAT +#define RK_VIDIOC_COMPAT_VCM_TIMEINFO \ + _IOR('V', BASE_VIDIOC_PRIVATE + 0, struct rk_cam_compat_vcm_tim) +#endif + +struct rk_cam_vcm_tim { + struct timeval vcm_start_t; + struct timeval vcm_end_t; +}; + +#ifdef CONFIG_COMPAT +struct rk_cam_compat_vcm_tim { + struct compat_timeval vcm_start_t; + struct compat_timeval vcm_end_t; +}; +#endif + +#endif /* RK_VCM_HEAD_H */ + diff --git a/drivers/media/i2c/vm149c.c b/drivers/media/i2c/vm149c.c new file mode 100644 index 000000000000..e9403de9d06e --- /dev/null +++ b/drivers/media/i2c/vm149c.c @@ -0,0 +1,545 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Fuzhou Rockchip Electronics Co., Ltd. + +#include +#include +#include +#include +#include +#include +#include "rk_vcm_head.h" + +#define VM149C_NAME "vm149c" + +#define VM149C_MAX_CURRENT 100U +#define VM149C_MAX_REG 1023U + +#define VM149C_DEFAULT_START_CURRENT 0 +#define VM149C_DEFAULT_RATED_CURRENT 100 +#define VM149C_DEFAULT_STEP_MODE 4 + +/* vm149c device structure */ +struct vm149c_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 vcm_movefull_t; + + struct timeval start_move_tv; + struct timeval end_move_tv; + unsigned long move_ms; +}; + +static inline struct vm149c_device *to_vm149c_vcm(struct v4l2_ctrl *ctrl) +{ + return container_of(ctrl->handler, struct vm149c_device, ctrls_vcm); +} + +static inline struct vm149c_device *sd_to_vm149c_vcm(struct v4l2_subdev *subdev) +{ + return container_of(subdev, struct vm149c_device, sd); +} + +static int vm149c_read_msg( + struct i2c_client *client, + unsigned char *msb, unsigned char *lsb) +{ + int ret = 0; + struct i2c_msg msg[1]; + unsigned char data[2]; + int retries; + + if (!client->adapter) { + dev_err(&client->dev, "client->adapter NULL\n"); + return -ENODEV; + } + + for (retries = 0; retries < 5; retries++) { + msg->addr = client->addr; + msg->flags = 1; + msg->len = 2; + msg->buf = data; + + ret = i2c_transfer(client->adapter, msg, 1); + if (ret == 1) { + dev_dbg(&client->dev, + "%s: vcm i2c ok, addr 0x%x, data 0x%x, 0x%x\n", + __func__, msg->addr, data[0], data[1]); + + *msb = data[0]; + *lsb = data[1]; + return 0; + } + + dev_info(&client->dev, + "retrying I2C... %d\n", retries); + retries++; + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(msecs_to_jiffies(20)); + } + dev_err(&client->dev, + "%s: i2c write to failed with error %d\n", __func__, ret); + return ret; +} + +static int vm149c_write_msg( + struct i2c_client *client, + u8 msb, u8 lsb) +{ + int ret = 0; + struct i2c_msg msg[1]; + unsigned char data[2]; + int retries; + + if (!client->adapter) { + dev_err(&client->dev, "client->adapter NULL\n"); + return -ENODEV; + } + + for (retries = 0; retries < 5; retries++) { + msg->addr = client->addr; + msg->flags = 0; + msg->len = 2; + msg->buf = data; + + data[0] = msb; + data[1] = lsb; + + ret = i2c_transfer(client->adapter, msg, 1); + usleep_range(50, 100); + + if (ret == 1) { + dev_dbg(&client->dev, + "%s: vcm i2c ok, addr 0x%x, data 0x%x, 0x%x\n", + __func__, msg->addr, data[0], data[1]); + return 0; + } + + dev_info(&client->dev, + "retrying I2C... %d\n", retries); + retries++; + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(msecs_to_jiffies(20)); + } + dev_err(&client->dev, + "i2c write to failed with error %d\n", ret); + return ret; +} + +static int vm149c_get_pos( + struct vm149c_device *dev_vcm, + unsigned int *cur_pos) +{ + struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd); + int ret; + unsigned char lsb; + unsigned char msb; + unsigned int abs_step; + + ret = vm149c_read_msg(client, &msb, &lsb); + if (IS_ERR_VALUE(ret)) + goto err; + + abs_step = (((unsigned int)(msb & 0x3FU)) << 4U) | + (((unsigned int)lsb) >> 4U); + 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 vm149c_set_pos( + struct vm149c_device *dev_vcm, + unsigned int dest_pos) +{ + int ret; + unsigned char lsb; + unsigned char msb; + unsigned int position; + 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 > VM149C_MAX_REG) + position = VM149C_MAX_REG; + + dev_vcm->current_lens_pos = position; + dev_vcm->current_related_pos = dest_pos; + msb = (0x00U | ((dev_vcm->current_lens_pos & 0x3F0U) >> 4U)); + lsb = (((dev_vcm->current_lens_pos & 0x0FU) << 4U) | + dev_vcm->step_mode); + ret = vm149c_write_msg(client, msb, lsb); + if (IS_ERR_VALUE(ret)) + goto err; + + return ret; +err: + dev_err(&client->dev, + "%s: failed with error %d\n", __func__, ret); + return ret; +} + +static int vm149c_get_ctrl(struct v4l2_ctrl *ctrl) +{ + struct vm149c_device *dev_vcm = to_vm149c_vcm(ctrl); + + if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) + return vm149c_get_pos(dev_vcm, &ctrl->val); + + return -EINVAL; +} + +static int vm149c_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct vm149c_device *dev_vcm = to_vm149c_vcm(ctrl); + struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd); + unsigned int dest_pos = ctrl->val; + int move_pos; + long int 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; + } else { + /* calculate move time */ + move_pos = dev_vcm->current_related_pos - dest_pos; + if (move_pos < 0) + move_pos = -move_pos; + + ret = vm149c_set_pos(dev_vcm, dest_pos); + + dev_vcm->move_ms = + ((dev_vcm->vcm_movefull_t * (uint32_t)move_pos) / VCMDRV_MAX_LOG); + dev_dbg(&client->dev, + "dest_pos %d, move_ms %ld\n", dest_pos, dev_vcm->move_ms); + + dev_vcm->start_move_tv = ns_to_timeval(ktime_get_ns()); + mv_us = dev_vcm->start_move_tv.tv_usec + dev_vcm->move_ms * 1000; + 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 vm149c_vcm_ctrl_ops = { + .g_volatile_ctrl = vm149c_get_ctrl, + .s_ctrl = vm149c_set_ctrl, +}; + +static int vm149c_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + int rval; + + rval = pm_runtime_get_sync(sd->dev); + if (rval < 0) { + pm_runtime_put_noidle(sd->dev); + return rval; + } + + return 0; +} + +static int vm149c_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + pm_runtime_put(sd->dev); + + return 0; +} + +static const struct v4l2_subdev_internal_ops vm149c_int_ops = { + .open = vm149c_open, + .close = vm149c_close, +}; + +static long vm149c_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 vm149c_device *vm149c_dev = sd_to_vm149c_vcm(sd); + + if (cmd == RK_VIDIOC_VCM_TIMEINFO) { + vcm_tim = (struct rk_cam_vcm_tim *)arg; + + vcm_tim->vcm_start_t.tv_sec = vm149c_dev->start_move_tv.tv_sec; + vcm_tim->vcm_start_t.tv_usec = vm149c_dev->start_move_tv.tv_usec; + vcm_tim->vcm_end_t.tv_sec = vm149c_dev->end_move_tv.tv_sec; + vcm_tim->vcm_end_t.tv_usec = vm149c_dev->end_move_tv.tv_usec; + + dev_dbg(&client->dev, "vm149c_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 vm149c_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; + struct rk_cam_compat_vcm_tim __user *p32 = compat_ptr(arg); + struct i2c_client *client = v4l2_get_subdevdata(sd); + long ret; + + if (cmd == RK_VIDIOC_COMPAT_VCM_TIMEINFO) { + ret = vm149c_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 vm149c_core_ops = { + .ioctl = vm149c_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl32 = vm149c_compat_ioctl32 +#endif +}; + +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 vm149c_device *vm149c_dev; + int ret; + int current_distance; + struct device_node *np = of_node_get(client->dev.of_node); + unsigned int start_current; + unsigned int rated_current; + unsigned int step_mode; + + dev_info(&client->dev, "probing...\n"); + if (of_property_read_u32( + np, + OF_CAMERA_VCMDRV_START_CURRENT, + (unsigned int *)&start_current)) { + start_current = 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_current)) { + rated_current = 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; + + 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_init(&vm149c_dev->sd.entity, 0, NULL, 0); + if (ret < 0) + goto err_cleanup; + + vm149c_dev->sd.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_LENS; + + ret = v4l2_device_register(&client->dev, &vm149c_dev->vdev); + if (ret < 0) { + dev_err(&client->dev, "vm149 v4l2 device register failed, ret: %d\n", ret); + goto err_cleanup; + } + + ret = v4l2_device_register_subdev(&vm149c_dev->vdev, &vm149c_dev->sd); + if (ret) { + dev_err(&client->dev, "vm149 v4l2 register subdev failed, ret: %d\n", ret); + goto err_cleanup; + } else { + dev_info(&client->dev, "vm149 v4l2 register subdev success\n"); + } + + ret = v4l2_device_register_subdev_nodes(&vm149c_dev->vdev); + if (ret < 0) { + dev_err(&client->dev, "vm149 v4l2 device nodesregister, ret: %d\n", ret); + goto err_cleanup; + } + + current_distance = rated_current - start_current; + current_distance = current_distance * VM149C_MAX_REG / VM149C_MAX_CURRENT; + vm149c_dev->step = (current_distance + (VCMDRV_MAX_LOG - 1)) / VCMDRV_MAX_LOG; + vm149c_dev->start_current = start_current * VM149C_MAX_REG / VM149C_MAX_CURRENT; + vm149c_dev->rated_current = vm149c_dev->start_current + VCMDRV_MAX_LOG * vm149c_dev->step; + vm149c_dev->step_mode = step_mode; + 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) +{ + 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");