capability. This is designed for linear control of
voice coil motors, controlled via I2C serial interface.
-config VIDEO_DW9807
+config VIDEO_DW9807_VCM
tristate "DW9807 lens voice coil support"
depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
depends on VIDEO_V4L2_SUBDEV_API
obj-$(CONFIG_VIDEO_AD5820) += ad5820.o
obj-$(CONFIG_VIDEO_AK7375) += ak7375.o
obj-$(CONFIG_VIDEO_DW9714) += dw9714.o
-obj-$(CONFIG_VIDEO_DW9807) += dw9807.o
+obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
obj-$(CONFIG_VIDEO_ADV7170) += adv7170.o
obj-$(CONFIG_VIDEO_ADV7175) += adv7175.o
obj-$(CONFIG_VIDEO_ADV7180) += adv7180.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Intel Corporation
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+#define DW9807_MAX_FOCUS_POS 1023
+/*
+ * This sets the minimum granularity for the focus positions.
+ * A value of 1 gives maximum accuracy for a desired focus position.
+ */
+#define DW9807_FOCUS_STEPS 1
+/*
+ * This acts as the minimum granularity of lens movement.
+ * Keep this value power of 2, so the control steps can be
+ * uniformly adjusted for gradual lens movement, with desired
+ * number of control steps.
+ */
+#define DW9807_CTRL_STEPS 16
+#define DW9807_CTRL_DELAY_US 1000
+
+#define DW9807_CTL_ADDR 0x02
+/*
+ * DW9807 separates two registers to control the VCM position.
+ * One for MSB value, another is LSB value.
+ */
+#define DW9807_MSB_ADDR 0x03
+#define DW9807_LSB_ADDR 0x04
+#define DW9807_STATUS_ADDR 0x05
+#define DW9807_MODE_ADDR 0x06
+#define DW9807_RESONANCE_ADDR 0x07
+
+#define MAX_RETRY 10
+
+struct dw9807_device {
+ struct v4l2_ctrl_handler ctrls_vcm;
+ struct v4l2_subdev sd;
+ u16 current_val;
+};
+
+static inline struct dw9807_device *sd_to_dw9807_vcm(
+ struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct dw9807_device, sd);
+}
+
+static int dw9807_i2c_check(struct i2c_client *client)
+{
+ const char status_addr = DW9807_STATUS_ADDR;
+ char status_result;
+ int ret;
+
+ ret = i2c_master_send(client, &status_addr, sizeof(status_addr));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C write STATUS address fail ret = %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = i2c_master_recv(client, &status_result, sizeof(status_result));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C read STATUS value fail ret = %d\n",
+ ret);
+ return ret;
+ }
+
+ return status_result;
+}
+
+static int dw9807_set_dac(struct i2c_client *client, u16 data)
+{
+ const char tx_data[3] = {
+ DW9807_MSB_ADDR, ((data >> 8) & 0x03), (data & 0xff)
+ };
+ int val, ret;
+
+ /*
+ * According to the datasheet, need to check the bus status before we
+ * write VCM position. This ensure that we really write the value
+ * into the register
+ */
+ ret = readx_poll_timeout(dw9807_i2c_check, client, val, val <= 0,
+ DW9807_CTRL_DELAY_US, MAX_RETRY * DW9807_CTRL_DELAY_US);
+
+ if (ret || val < 0) {
+ if (ret) {
+ dev_warn(&client->dev,
+ "Cannot do the write operation because VCM is busy\n");
+ }
+
+ return ret ? -EBUSY : val;
+ }
+
+ /* Write VCM position to registers */
+ ret = i2c_master_send(client, tx_data, sizeof(tx_data));
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "I2C write MSB fail ret=%d\n", ret);
+
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw9807_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct dw9807_device *dev_vcm = container_of(ctrl->handler,
+ struct dw9807_device, ctrls_vcm);
+
+ if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
+ struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
+
+ dev_vcm->current_val = ctrl->val;
+ return dw9807_set_dac(client, ctrl->val);
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops dw9807_vcm_ctrl_ops = {
+ .s_ctrl = dw9807_set_ctrl,
+};
+
+static int dw9807_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 dw9807_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ pm_runtime_put(sd->dev);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops dw9807_int_ops = {
+ .open = dw9807_open,
+ .close = dw9807_close,
+};
+
+static const struct v4l2_subdev_ops dw9807_ops = { };
+
+static void dw9807_subdev_cleanup(struct dw9807_device *dw9807_dev)
+{
+ v4l2_async_unregister_subdev(&dw9807_dev->sd);
+ v4l2_ctrl_handler_free(&dw9807_dev->ctrls_vcm);
+ media_entity_cleanup(&dw9807_dev->sd.entity);
+}
+
+static int dw9807_init_controls(struct dw9807_device *dev_vcm)
+{
+ struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
+ const struct v4l2_ctrl_ops *ops = &dw9807_vcm_ctrl_ops;
+ struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
+
+ v4l2_ctrl_handler_init(hdl, 1);
+
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
+ 0, DW9807_MAX_FOCUS_POS, DW9807_FOCUS_STEPS, 0);
+
+ dev_vcm->sd.ctrl_handler = hdl;
+ if (hdl->error) {
+ dev_err(&client->dev, "%s fail error: 0x%x\n",
+ __func__, hdl->error);
+ return hdl->error;
+ }
+
+ return 0;
+}
+
+static int dw9807_probe(struct i2c_client *client)
+{
+ struct dw9807_device *dw9807_dev;
+ int rval;
+
+ dw9807_dev = devm_kzalloc(&client->dev, sizeof(*dw9807_dev),
+ GFP_KERNEL);
+ if (dw9807_dev == NULL)
+ return -ENOMEM;
+
+ v4l2_i2c_subdev_init(&dw9807_dev->sd, client, &dw9807_ops);
+ dw9807_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ dw9807_dev->sd.internal_ops = &dw9807_int_ops;
+
+ rval = dw9807_init_controls(dw9807_dev);
+ if (rval)
+ goto err_cleanup;
+
+ rval = media_entity_pads_init(&dw9807_dev->sd.entity, 0, NULL);
+ if (rval < 0)
+ goto err_cleanup;
+
+ dw9807_dev->sd.entity.function = MEDIA_ENT_F_LENS;
+
+ rval = v4l2_async_register_subdev(&dw9807_dev->sd);
+ if (rval < 0)
+ goto err_cleanup;
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+ pm_runtime_idle(&client->dev);
+
+ return 0;
+
+err_cleanup:
+ dw9807_subdev_cleanup(dw9807_dev);
+
+ return rval;
+}
+
+static int dw9807_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ dw9807_subdev_cleanup(dw9807_dev);
+
+ return 0;
+}
+
+/*
+ * This function sets the vcm position, so it consumes least current
+ * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
+ * to make the movements smoothly.
+ */
+static int __maybe_unused dw9807_vcm_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
+ const char tx_data[2] = { DW9807_CTL_ADDR, 0x01 };
+ int ret, val;
+
+ for (val = dw9807_dev->current_val & ~(DW9807_CTRL_STEPS - 1);
+ val >= 0; val -= DW9807_CTRL_STEPS) {
+ ret = dw9807_set_dac(client, val);
+ if (ret)
+ dev_err_once(dev, "%s I2C failure: %d", __func__, ret);
+ usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
+ }
+
+ /* Power down */
+ ret = i2c_master_send(client, tx_data, sizeof(tx_data));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * This function sets the vcm position to the value set by the user
+ * through v4l2_ctrl_ops s_ctrl handler
+ * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
+ * to make the movements smoothly.
+ */
+static int __maybe_unused dw9807_vcm_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
+ const char tx_data[2] = { DW9807_CTL_ADDR, 0x00 };
+ int ret, val;
+
+ /* Power on */
+ ret = i2c_master_send(client, tx_data, sizeof(tx_data));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
+ return ret;
+ }
+
+ for (val = dw9807_dev->current_val % DW9807_CTRL_STEPS;
+ val < dw9807_dev->current_val + DW9807_CTRL_STEPS - 1;
+ val += DW9807_CTRL_STEPS) {
+ ret = dw9807_set_dac(client, val);
+ if (ret)
+ dev_err_ratelimited(dev, "%s I2C failure: %d",
+ __func__, ret);
+ usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id dw9807_of_table[] = {
+ { .compatible = "dongwoon,dw9807-vcm" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw9807_of_table);
+
+static const struct dev_pm_ops dw9807_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume)
+ SET_RUNTIME_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume, NULL)
+};
+
+static struct i2c_driver dw9807_i2c_driver = {
+ .driver = {
+ .name = "dw9807",
+ .pm = &dw9807_pm_ops,
+ .of_match_table = dw9807_of_table,
+ },
+ .probe_new = dw9807_probe,
+ .remove = dw9807_remove,
+};
+
+module_i2c_driver(dw9807_i2c_driver);
+
+MODULE_AUTHOR("Chiang, Alan <alanx.chiang@intel.com>");
+MODULE_DESCRIPTION("DW9807 VCM driver");
+MODULE_LICENSE("GPL v2");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2018 Intel Corporation
-
-#include <linux/acpi.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/iopoll.h>
-#include <linux/module.h>
-#include <linux/pm_runtime.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-device.h>
-
-#define DW9807_MAX_FOCUS_POS 1023
-/*
- * This sets the minimum granularity for the focus positions.
- * A value of 1 gives maximum accuracy for a desired focus position.
- */
-#define DW9807_FOCUS_STEPS 1
-/*
- * This acts as the minimum granularity of lens movement.
- * Keep this value power of 2, so the control steps can be
- * uniformly adjusted for gradual lens movement, with desired
- * number of control steps.
- */
-#define DW9807_CTRL_STEPS 16
-#define DW9807_CTRL_DELAY_US 1000
-
-#define DW9807_CTL_ADDR 0x02
-/*
- * DW9807 separates two registers to control the VCM position.
- * One for MSB value, another is LSB value.
- */
-#define DW9807_MSB_ADDR 0x03
-#define DW9807_LSB_ADDR 0x04
-#define DW9807_STATUS_ADDR 0x05
-#define DW9807_MODE_ADDR 0x06
-#define DW9807_RESONANCE_ADDR 0x07
-
-#define MAX_RETRY 10
-
-struct dw9807_device {
- struct v4l2_ctrl_handler ctrls_vcm;
- struct v4l2_subdev sd;
- u16 current_val;
-};
-
-static inline struct dw9807_device *sd_to_dw9807_vcm(
- struct v4l2_subdev *subdev)
-{
- return container_of(subdev, struct dw9807_device, sd);
-}
-
-static int dw9807_i2c_check(struct i2c_client *client)
-{
- const char status_addr = DW9807_STATUS_ADDR;
- char status_result;
- int ret;
-
- ret = i2c_master_send(client, &status_addr, sizeof(status_addr));
- if (ret < 0) {
- dev_err(&client->dev, "I2C write STATUS address fail ret = %d\n",
- ret);
- return ret;
- }
-
- ret = i2c_master_recv(client, &status_result, sizeof(status_result));
- if (ret < 0) {
- dev_err(&client->dev, "I2C read STATUS value fail ret = %d\n",
- ret);
- return ret;
- }
-
- return status_result;
-}
-
-static int dw9807_set_dac(struct i2c_client *client, u16 data)
-{
- const char tx_data[3] = {
- DW9807_MSB_ADDR, ((data >> 8) & 0x03), (data & 0xff)
- };
- int val, ret;
-
- /*
- * According to the datasheet, need to check the bus status before we
- * write VCM position. This ensure that we really write the value
- * into the register
- */
- ret = readx_poll_timeout(dw9807_i2c_check, client, val, val <= 0,
- DW9807_CTRL_DELAY_US, MAX_RETRY * DW9807_CTRL_DELAY_US);
-
- if (ret || val < 0) {
- if (ret) {
- dev_warn(&client->dev,
- "Cannot do the write operation because VCM is busy\n");
- }
-
- return ret ? -EBUSY : val;
- }
-
- /* Write VCM position to registers */
- ret = i2c_master_send(client, tx_data, sizeof(tx_data));
- if (ret < 0) {
- dev_err(&client->dev,
- "I2C write MSB fail ret=%d\n", ret);
-
- return ret;
- }
-
- return 0;
-}
-
-static int dw9807_set_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct dw9807_device *dev_vcm = container_of(ctrl->handler,
- struct dw9807_device, ctrls_vcm);
-
- if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
- struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
-
- dev_vcm->current_val = ctrl->val;
- return dw9807_set_dac(client, ctrl->val);
- }
-
- return -EINVAL;
-}
-
-static const struct v4l2_ctrl_ops dw9807_vcm_ctrl_ops = {
- .s_ctrl = dw9807_set_ctrl,
-};
-
-static int dw9807_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 dw9807_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
-{
- pm_runtime_put(sd->dev);
-
- return 0;
-}
-
-static const struct v4l2_subdev_internal_ops dw9807_int_ops = {
- .open = dw9807_open,
- .close = dw9807_close,
-};
-
-static const struct v4l2_subdev_ops dw9807_ops = { };
-
-static void dw9807_subdev_cleanup(struct dw9807_device *dw9807_dev)
-{
- v4l2_async_unregister_subdev(&dw9807_dev->sd);
- v4l2_ctrl_handler_free(&dw9807_dev->ctrls_vcm);
- media_entity_cleanup(&dw9807_dev->sd.entity);
-}
-
-static int dw9807_init_controls(struct dw9807_device *dev_vcm)
-{
- struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
- const struct v4l2_ctrl_ops *ops = &dw9807_vcm_ctrl_ops;
- struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
-
- v4l2_ctrl_handler_init(hdl, 1);
-
- v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
- 0, DW9807_MAX_FOCUS_POS, DW9807_FOCUS_STEPS, 0);
-
- dev_vcm->sd.ctrl_handler = hdl;
- if (hdl->error) {
- dev_err(&client->dev, "%s fail error: 0x%x\n",
- __func__, hdl->error);
- return hdl->error;
- }
-
- return 0;
-}
-
-static int dw9807_probe(struct i2c_client *client)
-{
- struct dw9807_device *dw9807_dev;
- int rval;
-
- dw9807_dev = devm_kzalloc(&client->dev, sizeof(*dw9807_dev),
- GFP_KERNEL);
- if (dw9807_dev == NULL)
- return -ENOMEM;
-
- v4l2_i2c_subdev_init(&dw9807_dev->sd, client, &dw9807_ops);
- dw9807_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
- dw9807_dev->sd.internal_ops = &dw9807_int_ops;
-
- rval = dw9807_init_controls(dw9807_dev);
- if (rval)
- goto err_cleanup;
-
- rval = media_entity_pads_init(&dw9807_dev->sd.entity, 0, NULL);
- if (rval < 0)
- goto err_cleanup;
-
- dw9807_dev->sd.entity.function = MEDIA_ENT_F_LENS;
-
- rval = v4l2_async_register_subdev(&dw9807_dev->sd);
- if (rval < 0)
- goto err_cleanup;
-
- pm_runtime_set_active(&client->dev);
- pm_runtime_enable(&client->dev);
- pm_runtime_idle(&client->dev);
-
- return 0;
-
-err_cleanup:
- dw9807_subdev_cleanup(dw9807_dev);
-
- return rval;
-}
-
-static int dw9807_remove(struct i2c_client *client)
-{
- struct v4l2_subdev *sd = i2c_get_clientdata(client);
- struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
-
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
-
- dw9807_subdev_cleanup(dw9807_dev);
-
- return 0;
-}
-
-/*
- * This function sets the vcm position, so it consumes least current
- * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
- * to make the movements smoothly.
- */
-static int __maybe_unused dw9807_vcm_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct v4l2_subdev *sd = i2c_get_clientdata(client);
- struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
- const char tx_data[2] = { DW9807_CTL_ADDR, 0x01 };
- int ret, val;
-
- for (val = dw9807_dev->current_val & ~(DW9807_CTRL_STEPS - 1);
- val >= 0; val -= DW9807_CTRL_STEPS) {
- ret = dw9807_set_dac(client, val);
- if (ret)
- dev_err_once(dev, "%s I2C failure: %d", __func__, ret);
- usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
- }
-
- /* Power down */
- ret = i2c_master_send(client, tx_data, sizeof(tx_data));
- if (ret < 0) {
- dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-/*
- * This function sets the vcm position to the value set by the user
- * through v4l2_ctrl_ops s_ctrl handler
- * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
- * to make the movements smoothly.
- */
-static int __maybe_unused dw9807_vcm_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct v4l2_subdev *sd = i2c_get_clientdata(client);
- struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
- const char tx_data[2] = { DW9807_CTL_ADDR, 0x00 };
- int ret, val;
-
- /* Power on */
- ret = i2c_master_send(client, tx_data, sizeof(tx_data));
- if (ret < 0) {
- dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
- return ret;
- }
-
- for (val = dw9807_dev->current_val % DW9807_CTRL_STEPS;
- val < dw9807_dev->current_val + DW9807_CTRL_STEPS - 1;
- val += DW9807_CTRL_STEPS) {
- ret = dw9807_set_dac(client, val);
- if (ret)
- dev_err_ratelimited(dev, "%s I2C failure: %d",
- __func__, ret);
- usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
- }
-
- return 0;
-}
-
-static const struct of_device_id dw9807_of_table[] = {
- { .compatible = "dongwoon,dw9807-vcm" },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, dw9807_of_table);
-
-static const struct dev_pm_ops dw9807_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume)
- SET_RUNTIME_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume, NULL)
-};
-
-static struct i2c_driver dw9807_i2c_driver = {
- .driver = {
- .name = "dw9807",
- .pm = &dw9807_pm_ops,
- .of_match_table = dw9807_of_table,
- },
- .probe_new = dw9807_probe,
- .remove = dw9807_remove,
-};
-
-module_i2c_driver(dw9807_i2c_driver);
-
-MODULE_AUTHOR("Chiang, Alan <alanx.chiang@intel.com>");
-MODULE_DESCRIPTION("DW9807 VCM driver");
-MODULE_LICENSE("GPL v2");
projects / openwrt / staging / blogic.git / commitdiff