From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/media/i2c/dw9719.c | 350 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 350 insertions(+) create mode 100644 drivers/media/i2c/dw9719.c (limited to 'drivers/media/i2c/dw9719.c') diff --git a/drivers/media/i2c/dw9719.c b/drivers/media/i2c/dw9719.c new file mode 100644 index 0000000000..c626ed8459 --- /dev/null +++ b/drivers/media/i2c/dw9719.c @@ -0,0 +1,350 @@ +// 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 +#include +#include +#include +#include + +#include +#include +#include +#include + +#define DW9719_MAX_FOCUS_POS 1023 +#define DW9719_CTRL_STEPS 16 +#define DW9719_CTRL_DELAY_US 1000 + +#define DW9719_INFO CCI_REG8(0) +#define DW9719_ID 0xF1 + +#define DW9719_CONTROL CCI_REG8(2) +#define DW9719_ENABLE_RINGING 0x02 + +#define DW9719_VCM_CURRENT CCI_REG16(3) + +#define DW9719_MODE CCI_REG8(6) +#define DW9719_MODE_SAC_SHIFT 4 +#define DW9719_MODE_SAC3 4 + +#define DW9719_VCM_FREQ CCI_REG8(7) +#define DW9719_DEFAULT_VCM_FREQ 0x60 + +#define to_dw9719_device(x) container_of(x, struct dw9719_device, sd) + +struct dw9719_device { + struct v4l2_subdev sd; + struct device *dev; + struct regmap *regmap; + struct regulator *regulator; + u32 sac_mode; + u32 vcm_freq; + + struct dw9719_v4l2_ctrls { + struct v4l2_ctrl_handler handler; + struct v4l2_ctrl *focus; + } ctrls; +}; + +static int dw9719_detect(struct dw9719_device *dw9719) +{ + int ret; + u64 val; + + ret = cci_read(dw9719->regmap, DW9719_INFO, &val, NULL); + if (ret < 0) + return ret; + + if (val != DW9719_ID) { + dev_err(dw9719->dev, "Failed to detect correct id\n"); + return -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 */ + cci_write(dw9719->regmap, DW9719_CONTROL, 1, &ret); + + /* Need 100us to transit from SHUTDOWN to STANDBY */ + fsleep(100); + + cci_write(dw9719->regmap, DW9719_CONTROL, DW9719_ENABLE_RINGING, &ret); + cci_write(dw9719->regmap, DW9719_MODE, + dw9719->sac_mode << DW9719_MODE_SAC_SHIFT, &ret); + cci_write(dw9719->regmap, DW9719_VCM_FREQ, dw9719->vcm_freq, &ret); + + if (ret) + dw9719_power_down(dw9719); + + return ret; +} + +static int dw9719_t_focus_abs(struct dw9719_device *dw9719, s32 value) +{ + return cci_write(dw9719->regmap, DW9719_VCM_CURRENT, value, NULL); +} + +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 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 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; + + v4l2_ctrl_handler_init(&dw9719->ctrls.handler, 1); + + 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 0; + +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->regmap = devm_cci_regmap_init_i2c(client, 8); + if (IS_ERR(dw9719->regmap)) + return PTR_ERR(dw9719->regmap); + + 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); + + v4l2_async_unregister_subdev(sd); + v4l2_ctrl_handler_free(&dw9719->ctrls.handler); + media_entity_cleanup(&dw9719->sd.entity); + + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + dw9719_power_down(dw9719); + pm_runtime_set_suspended(&client->dev); +} + +static const struct i2c_device_id dw9719_id_table[] = { + { "dw9719" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, dw9719_id_table); + +static DEFINE_RUNTIME_DEV_PM_OPS(dw9719_pm_ops, dw9719_suspend, dw9719_resume, + NULL); + +static struct i2c_driver dw9719_i2c_driver = { + .driver = { + .name = "dw9719", + .pm = pm_sleep_ptr(&dw9719_pm_ops), + }, + .probe = dw9719_probe, + .remove = dw9719_remove, + .id_table = dw9719_id_table, +}; +module_i2c_driver(dw9719_i2c_driver); + +MODULE_AUTHOR("Daniel Scally "); +MODULE_DESCRIPTION("DW9719 VCM Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3