* [PATCH v4 0/1] media: i2c: Add driver for DW9719 VCM
@ 2023-07-06 14:57 Hans de Goede
2023-07-06 14:57 ` [PATCH v4 1/1] " Hans de Goede
0 siblings, 1 reply; 3+ messages in thread
From: Hans de Goede @ 2023-07-06 14:57 UTC (permalink / raw)
To: Sakari Ailus, Laurent Pinchart, Rui Miguel Silva, Daniel Scally
Cc: Hans de Goede, Mauro Carvalho Chehab, Andy Shevchenko,
Kate Hsuan, Dave Stevenson, Tommaso Merciai, linux-media
Hi All,
Here is Dan's patch to add DW9719 support now back to
a standalone patch again for easier reving of the patch
in response to review comments.
Note this now depends on the new CCI helpers:
https://lore.kernel.org/linux-media/20230627125109.52354-1-hdegoede@redhat.com/
Changes in v4:
- Back to a standalone patch again (instead of being part of a series)
- Switch to using CCI helpers for register access
- Use new DEFINE_RUNTIME_DEV_PM_OPS() for pm-ops
- Make v4l2_subdev first member of dw9719_device
- Drop v4l2_ctrl_handler_init() ret value check
- Turn of VCM on dw9719_remove() if necessary
Regards,
Hans
Daniel Scally (1):
media: i2c: Add driver for DW9719 VCM
MAINTAINERS | 7 +
drivers/media/i2c/Kconfig | 12 ++
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/dw9719.c | 348 +++++++++++++++++++++++++++++++++++++
4 files changed, 368 insertions(+)
create mode 100644 drivers/media/i2c/dw9719.c
--
2.41.0
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH v4 1/1] media: i2c: Add driver for DW9719 VCM
2023-07-06 14:57 [PATCH v4 0/1] media: i2c: Add driver for DW9719 VCM Hans de Goede
@ 2023-07-06 14:57 ` Hans de Goede
2023-07-06 15:25 ` Andy Shevchenko
0 siblings, 1 reply; 3+ messages in thread
From: Hans de Goede @ 2023-07-06 14:57 UTC (permalink / raw)
To: Sakari Ailus, Laurent Pinchart, Rui Miguel Silva, Daniel Scally
Cc: Hans de Goede, Mauro Carvalho Chehab, Andy Shevchenko,
Kate Hsuan, Dave Stevenson, Tommaso Merciai, linux-media,
Daniel Scally
From: Daniel Scally <djrscally@gmail.com>
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@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v4 (Hans de Goede)
- Back to a standalone patch again (instead of being part of a series)
- Switch to using CCI helpers for register access
- Use new DEFINE_RUNTIME_DEV_PM_OPS() for pm-ops
- Make v4l2_subdev first member of dw9719_device
- Drop v4l2_ctrl_handler_init() ret value check
- Turn of VCM on dw9719_remove() if necessary
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@gmail.com/
- 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 | 12 ++
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/dw9719.c | 348 +++++++++++++++++++++++++++++++++++++
4 files changed, 368 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@gmail.com>
+L: linux-media@vger.kernel.org
+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@vger.kernel.org
S: Orphan
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 26dc365365d8..9f2331e9836a 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -875,6 +875,18 @@ 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
+ select V4L2_CCI_I2C
+ 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..d8975b5bcfa9
--- /dev/null
+++ b/drivers/media/i2c/dw9719.c
@@ -0,0 +1,348 @@
+// 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 <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+
+#include <media/v4l2-cci.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 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);
+
+ /* 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 <djrscally@gmail.com>");
+MODULE_DESCRIPTION("DW9719 VCM Driver");
+MODULE_LICENSE("GPL");
--
2.41.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v4 1/1] media: i2c: Add driver for DW9719 VCM
2023-07-06 14:57 ` [PATCH v4 1/1] " Hans de Goede
@ 2023-07-06 15:25 ` Andy Shevchenko
0 siblings, 0 replies; 3+ messages in thread
From: Andy Shevchenko @ 2023-07-06 15:25 UTC (permalink / raw)
To: Hans de Goede
Cc: Sakari Ailus, Laurent Pinchart, Rui Miguel Silva, Daniel Scally,
Mauro Carvalho Chehab, Andy Shevchenko, Kate Hsuan,
Dave Stevenson, Tommaso Merciai, linux-media, Daniel Scally
On Thu, Jul 6, 2023 at 5:58 PM Hans de Goede <hdegoede@redhat.com> wrote:
>
> From: Daniel Scally <djrscally@gmail.com>
>
> Add a driver for the DW9719 VCM. The driver creates a v4l2 subdevice
> and registers a control to set the desired focus.
A few nit-picks below, but looks fine to me
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Daniel Scally <djrscally@gmail.com>
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
> Changes in v4 (Hans de Goede)
> - Back to a standalone patch again (instead of being part of a series)
> - Switch to using CCI helpers for register access
> - Use new DEFINE_RUNTIME_DEV_PM_OPS() for pm-ops
> - Make v4l2_subdev first member of dw9719_device
> - Drop v4l2_ctrl_handler_init() ret value check
> - Turn of VCM on dw9719_remove() if necessary
>
> 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@gmail.com/
> - Drop hack to enable "vsio" regulator, this is no longer necessary
> now that there iscamera 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 | 12 ++
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/dw9719.c | 348 +++++++++++++++++++++++++++++++++++++
> 4 files changed, 368 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@gmail.com>
> +L: linux-media@vger.kernel.org
> +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@vger.kernel.org
> S: Orphan
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 26dc365365d8..9f2331e9836a 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -875,6 +875,18 @@ 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
> + select V4L2_CCI_I2C
> + 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..d8975b5bcfa9
> --- /dev/null
> +++ b/drivers/media/i2c/dw9719.c
> @@ -0,0 +1,348 @@
> +// 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 <linux/delay.h>
> +#include <linux/i2c.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/types.h>
> +
> +#include <media/v4l2-cci.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 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);
> +
> + /* Jiggle SCL pin to wake up device */
> + cci_write(dw9719->regmap, DW9719_CONTROL, 1, &ret);
> +
> + /* Need 100us to transit from SHUTDOWN to STANDBY*/
Still missing space before */.
> + 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;
Maybe have a separate definition for the upper limit and put a comment
why we need it this way.
> + 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);
I would logically split this, i.e.
static DEFINE_RUNTIME_DEV_PM_OPS(dw9719_pm_ops,
dw9719_suspend, dw9719_resume,
NULL);
Or
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 <djrscally@gmail.com>");
> +MODULE_DESCRIPTION("DW9719 VCM Driver");
> +MODULE_LICENSE("GPL");
> --
> 2.41.0
>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-07-06 15:26 UTC | newest]
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2023-07-06 14:57 [PATCH v4 0/1] media: i2c: Add driver for DW9719 VCM Hans de Goede
2023-07-06 14:57 ` [PATCH v4 1/1] " Hans de Goede
2023-07-06 15:25 ` Andy Shevchenko
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