From: Daniel Scally <djrscally@xxxxxxxxx> Add a driver for the DW9719 VCM. The driver creates a v4l2 subdevice and registers a control to set the desired focus. Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- Changes in v3 (Hans de Goede) - New patch in v3 of this series based on Dan Scally's initial DW9719 upstream submission: https://lore.kernel.org/all/20211128232115.38833-1-djrscally@xxxxxxxxx/ - Drop hack to enable "vsio" regulator, this is no longer necessary now that there is a device-link making the VCM a runtime-pm consumer of the sensor - Add checking of device-properties for sac-mode and vcm-freq, as requested by Sakari, this is done similar to the dw9768: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9768.yaml Note no devicetree binding doc is added since currently only i2c_device_id enumeration (instantiated by IPU bridge) is supported --- MAINTAINERS | 7 + drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/dw9719.c | 427 +++++++++++++++++++++++++++++++++++++ 4 files changed, 446 insertions(+) create mode 100644 drivers/media/i2c/dw9719.c diff --git a/MAINTAINERS b/MAINTAINERS index 494682dd437f..cf8e799f6ea2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6266,6 +6266,13 @@ T: git git://linuxtv.org/media_tree.git F: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.yaml F: drivers/media/i2c/dw9714.c +DONGWOON DW9719 LENS VOICE COIL DRIVER +M: Daniel Scally <djrscally@xxxxxxxxx> +L: linux-media@xxxxxxxxxxxxxxx +S: Maintained +T: git git://linuxtv.org/media_tree.git +F: drivers/media/i2c/dw9719.c + DONGWOON DW9768 LENS VOICE COIL DRIVER L: linux-media@xxxxxxxxxxxxxxx S: Orphan diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 26dc365365d8..4864f1df3c7a 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -875,6 +875,17 @@ config VIDEO_DW9714 capability. This is designed for linear control of voice coil motors, controlled via I2C serial interface. +config VIDEO_DW9719 + tristate "DW9719 lens voice coil support" + depends on I2C && VIDEO_DEV + select MEDIA_CONTROLLER + select VIDEO_V4L2_SUBDEV_API + select V4L2_ASYNC + help + This is a driver for the DW9719 camera lens voice coil. + This is designed for linear control of voice coil motors, + controlled via I2C serial interface. + config VIDEO_DW9768 tristate "DW9768 lens voice coil support" depends on I2C && VIDEO_DEV diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index d175a2e2fb19..745f8d07e649 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_VIDEO_DS90UB913) += ds90ub913.o obj-$(CONFIG_VIDEO_DS90UB953) += ds90ub953.o obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o obj-$(CONFIG_VIDEO_DW9714) += dw9714.o +obj-$(CONFIG_VIDEO_DW9719) += dw9719.o obj-$(CONFIG_VIDEO_DW9768) += dw9768.o obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/ diff --git a/drivers/media/i2c/dw9719.c b/drivers/media/i2c/dw9719.c new file mode 100644 index 000000000000..7b83ae102131 --- /dev/null +++ b/drivers/media/i2c/dw9719.c @@ -0,0 +1,427 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2012 Intel Corporation + +/* + * Based on linux/modules/camera/drivers/media/i2c/imx/dw9719.c in this repo: + * https://github.com/ZenfoneArea/android_kernel_asus_zenfone5 + */ + +#include <asm/unaligned.h> + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <linux/types.h> + +#include <media/v4l2-common.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-subdev.h> + +#define DW9719_MAX_FOCUS_POS 1023 +#define DW9719_CTRL_STEPS 16 +#define DW9719_CTRL_DELAY_US 1000 +#define DELAY_MAX_PER_STEP_NS (1000000 * 1023) + +#define DW9719_INFO 0 +#define DW9719_ID 0xF1 +#define DW9719_CONTROL 2 +#define DW9719_VCM_CURRENT 3 + +#define DW9719_MODE 6 +#define DW9719_VCM_FREQ 7 + +#define DW9719_MODE_SAC_SHIFT 4 +#define DW9719_MODE_SAC3 4 + +#define DW9719_DEFAULT_VCM_FREQ 0x60 + +#define DW9719_ENABLE_RINGING 0x02 + +#define to_dw9719_device(x) container_of(x, struct dw9719_device, sd) + +struct dw9719_device { + struct device *dev; + struct i2c_client *client; + struct regulator *regulator; + struct v4l2_subdev sd; + u32 sac_mode; + u32 vcm_freq; + + struct dw9719_v4l2_ctrls { + struct v4l2_ctrl_handler handler; + struct v4l2_ctrl *focus; + } ctrls; +}; + +static int dw9719_i2c_rd8(struct i2c_client *client, u8 reg, u8 *val) +{ + struct i2c_msg msg[2]; + u8 buf[2] = { reg }; + int ret; + + msg[0].addr = client->addr; + msg[0].flags = 0; + msg[0].len = 1; + msg[0].buf = buf; + + msg[1].addr = client->addr; + msg[1].flags = I2C_M_RD; + msg[1].len = 1; + msg[1].buf = &buf[1]; + *val = 0; + + ret = i2c_transfer(client->adapter, msg, 2); + if (ret < 0) + return ret; + + *val = buf[1]; + + return 0; +} + +static int dw9719_i2c_wr8(struct i2c_client *client, u8 reg, u8 val) +{ + struct i2c_msg msg; + int ret; + + u8 buf[2] = { reg, val }; + + msg.addr = client->addr; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + ret = i2c_transfer(client->adapter, &msg, 1); + + return ret < 0 ? ret : 0; +} + +static int dw9719_i2c_wr16(struct i2c_client *client, u8 reg, u16 val) +{ + struct i2c_msg msg; + u8 buf[3] = { reg }; + int ret; + + put_unaligned_be16(val, buf + 1); + + msg.addr = client->addr; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + ret = i2c_transfer(client->adapter, &msg, 1); + + return ret < 0 ? ret : 0; +} + +static int dw9719_detect(struct dw9719_device *dw9719) +{ + int ret; + u8 val; + + ret = dw9719_i2c_rd8(dw9719->client, DW9719_INFO, &val); + if (ret < 0) + return ret; + + if (val != DW9719_ID) { + dev_err(dw9719->dev, "Failed to detect correct id\n"); + ret = -ENXIO; + } + + return 0; +} + +static int dw9719_power_down(struct dw9719_device *dw9719) +{ + return regulator_disable(dw9719->regulator); +} + +static int dw9719_power_up(struct dw9719_device *dw9719) +{ + int ret; + + ret = regulator_enable(dw9719->regulator); + if (ret) + return ret; + + /* Jiggle SCL pin to wake up device */ + ret = dw9719_i2c_wr8(dw9719->client, DW9719_CONTROL, 1); + + /* Need 100us to transit from SHUTDOWN to STANDBY*/ + usleep_range(100, 1000); + + ret = dw9719_i2c_wr8(dw9719->client, DW9719_CONTROL, + DW9719_ENABLE_RINGING); + if (ret < 0) + goto fail_powerdown; + + ret = dw9719_i2c_wr8(dw9719->client, DW9719_MODE, + dw9719->sac_mode << DW9719_MODE_SAC_SHIFT); + if (ret < 0) + goto fail_powerdown; + + ret = dw9719_i2c_wr8(dw9719->client, DW9719_VCM_FREQ, dw9719->vcm_freq); + if (ret < 0) + goto fail_powerdown; + + return 0; + +fail_powerdown: + dw9719_power_down(dw9719); + return ret; +} + +static int dw9719_t_focus_abs(struct dw9719_device *dw9719, s32 value) +{ + int ret; + + value = clamp(value, 0, DW9719_MAX_FOCUS_POS); + ret = dw9719_i2c_wr16(dw9719->client, DW9719_VCM_CURRENT, value); + if (ret < 0) + return ret; + + return 0; +} + +static int dw9719_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct dw9719_device *dw9719 = container_of(ctrl->handler, + struct dw9719_device, + ctrls.handler); + int ret; + + /* Only apply changes to the controls if the device is powered up */ + if (!pm_runtime_get_if_in_use(dw9719->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_FOCUS_ABSOLUTE: + ret = dw9719_t_focus_abs(dw9719, ctrl->val); + break; + default: + ret = -EINVAL; + } + + pm_runtime_put(dw9719->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops dw9719_ctrl_ops = { + .s_ctrl = dw9719_set_ctrl, +}; + +static int __maybe_unused dw9719_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct dw9719_device *dw9719 = to_dw9719_device(sd); + int ret; + int val; + + for (val = dw9719->ctrls.focus->val; val >= 0; + val -= DW9719_CTRL_STEPS) { + ret = dw9719_t_focus_abs(dw9719, val); + if (ret) + return ret; + + usleep_range(DW9719_CTRL_DELAY_US, DW9719_CTRL_DELAY_US + 10); + } + + return dw9719_power_down(dw9719); +} + +static int __maybe_unused dw9719_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct dw9719_device *dw9719 = to_dw9719_device(sd); + int current_focus = dw9719->ctrls.focus->val; + int ret; + int val; + + ret = dw9719_power_up(dw9719); + if (ret) + return ret; + + for (val = current_focus % DW9719_CTRL_STEPS; val < current_focus; + val += DW9719_CTRL_STEPS) { + ret = dw9719_t_focus_abs(dw9719, val); + if (ret) + goto err_power_down; + + usleep_range(DW9719_CTRL_DELAY_US, DW9719_CTRL_DELAY_US + 10); + } + + return 0; + +err_power_down: + dw9719_power_down(dw9719); + return ret; +} + +static int dw9719_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return pm_runtime_resume_and_get(sd->dev); +} + +static int dw9719_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + pm_runtime_put(sd->dev); + + return 0; +} + +static const struct v4l2_subdev_internal_ops dw9719_internal_ops = { + .open = dw9719_open, + .close = dw9719_close, +}; + +static int dw9719_init_controls(struct dw9719_device *dw9719) +{ + const struct v4l2_ctrl_ops *ops = &dw9719_ctrl_ops; + int ret; + + ret = v4l2_ctrl_handler_init(&dw9719->ctrls.handler, 1); + if (ret) + return ret; + + dw9719->ctrls.focus = v4l2_ctrl_new_std(&dw9719->ctrls.handler, ops, + V4L2_CID_FOCUS_ABSOLUTE, 0, + DW9719_MAX_FOCUS_POS, 1, 0); + + if (dw9719->ctrls.handler.error) { + dev_err(dw9719->dev, "Error initialising v4l2 ctrls\n"); + ret = dw9719->ctrls.handler.error; + goto err_free_handler; + } + + dw9719->sd.ctrl_handler = &dw9719->ctrls.handler; + + return ret; + +err_free_handler: + v4l2_ctrl_handler_free(&dw9719->ctrls.handler); + return ret; +} + +static const struct v4l2_subdev_ops dw9719_ops = { }; + +static int dw9719_probe(struct i2c_client *client) +{ + struct dw9719_device *dw9719; + int ret; + + dw9719 = devm_kzalloc(&client->dev, sizeof(*dw9719), GFP_KERNEL); + if (!dw9719) + return -ENOMEM; + + dw9719->client = client; + dw9719->dev = &client->dev; + + dw9719->sac_mode = DW9719_MODE_SAC3; + dw9719->vcm_freq = DW9719_DEFAULT_VCM_FREQ; + + /* Optional indication of SAC mode select */ + device_property_read_u32(&client->dev, "dongwoon,sac-mode", + &dw9719->sac_mode); + + /* Optional indication of VCM frequency */ + device_property_read_u32(&client->dev, "dongwoon,vcm-freq", + &dw9719->vcm_freq); + + dw9719->regulator = devm_regulator_get(&client->dev, "vdd"); + if (IS_ERR(dw9719->regulator)) + return dev_err_probe(&client->dev, PTR_ERR(dw9719->regulator), + "getting regulator\n"); + + v4l2_i2c_subdev_init(&dw9719->sd, client, &dw9719_ops); + dw9719->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + dw9719->sd.internal_ops = &dw9719_internal_ops; + + ret = dw9719_init_controls(dw9719); + if (ret) + return ret; + + ret = media_entity_pads_init(&dw9719->sd.entity, 0, NULL); + if (ret < 0) + goto err_free_ctrl_handler; + + dw9719->sd.entity.function = MEDIA_ENT_F_LENS; + + /* + * We need the driver to work in the event that pm runtime is disable in + * the kernel, so power up and verify the chip now. In the event that + * runtime pm is disabled this will leave the chip on, so that the lens + * will work. + */ + + ret = dw9719_power_up(dw9719); + if (ret) + goto err_cleanup_media; + + ret = dw9719_detect(dw9719); + if (ret) + goto err_powerdown; + + pm_runtime_set_active(&client->dev); + pm_runtime_get_noresume(&client->dev); + pm_runtime_enable(&client->dev); + + ret = v4l2_async_register_subdev(&dw9719->sd); + if (ret < 0) + goto err_pm_runtime; + + pm_runtime_set_autosuspend_delay(&client->dev, 1000); + pm_runtime_use_autosuspend(&client->dev); + pm_runtime_put_autosuspend(&client->dev); + + return ret; + +err_pm_runtime: + pm_runtime_disable(&client->dev); + pm_runtime_put_noidle(&client->dev); +err_powerdown: + dw9719_power_down(dw9719); +err_cleanup_media: + media_entity_cleanup(&dw9719->sd.entity); +err_free_ctrl_handler: + v4l2_ctrl_handler_free(&dw9719->ctrls.handler); + + return ret; +} + +static void dw9719_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct dw9719_device *dw9719 = container_of(sd, struct dw9719_device, sd); + + pm_runtime_disable(&client->dev); + v4l2_async_unregister_subdev(sd); + v4l2_ctrl_handler_free(&dw9719->ctrls.handler); + media_entity_cleanup(&dw9719->sd.entity); +} + +static const struct i2c_device_id dw9719_id_table[] = { + { "dw9719" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, dw9719_id_table); + +static const struct dev_pm_ops dw9719_pm_ops = { + SET_RUNTIME_PM_OPS(dw9719_suspend, dw9719_resume, NULL) +}; + +static struct i2c_driver dw9719_i2c_driver = { + .driver = { + .name = "dw9719", + .pm = &dw9719_pm_ops, + }, + .probe_new = dw9719_probe, + .remove = dw9719_remove, + .id_table = dw9719_id_table, +}; +module_i2c_driver(dw9719_i2c_driver); + +MODULE_AUTHOR("Daniel Scally <djrscally@xxxxxxxxx>"); +MODULE_DESCRIPTION("DW9719 VCM Driver"); +MODULE_LICENSE("GPL"); -- 2.41.0
