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2e715fb4fc
Add support for BCM2712 (Raspberry Pi 5).
3bb5880ab3
Patches were generated from the diff between linux kernel branch linux-6.1.y
and rpi-6.1.y from raspberry pi kernel source:
- git format-patch linux-6.1.y...rpi-6.1.y
Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2710/RPi3B, bcm2711/RPi4B
Signed-off-by: Marty Jones <mj8263788@gmail.com>
[Remove applied and reverted patches, squash patches and config commits]
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
369 lines
9.5 KiB
Diff
369 lines
9.5 KiB
Diff
From 97ec6aeb265df0bfe7193f00c249b38873fb0fb7 Mon Sep 17 00:00:00 2001
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From: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Date: Wed, 13 Sep 2023 17:53:54 +0100
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Subject: [PATCH] media: i2c: Add ROHM BU64754 Camera Autofocus Actuator
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Add support for the ROHM BU64754 Motor Driver for Camera Autofocus. A
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V4L2 Subdevice is registered and provides a single
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V4L2_CID_FOCUS_ABSOLUTE control.
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Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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---
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drivers/media/i2c/Kconfig | 13 ++
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drivers/media/i2c/Makefile | 1 +
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drivers/media/i2c/bu64754.c | 315 ++++++++++++++++++++++++++++++++++++
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3 files changed, 329 insertions(+)
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create mode 100644 drivers/media/i2c/bu64754.c
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--- a/drivers/media/i2c/Kconfig
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+++ b/drivers/media/i2c/Kconfig
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@@ -917,6 +917,19 @@ config VIDEO_AK7375
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capability. This is designed for linear control of
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voice coil motors, controlled via I2C serial interface.
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+config VIDEO_BU64754
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+ tristate "BU64754 Motor Driver for Camera Autofocus"
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+ depends on I2C && VIDEO_DEV
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+ select MEDIA_CONTROLLER
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+ select VIDEO_V4L2_SUBDEV_API
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+ select V4L2_ASYNC
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+ select V4L2_CCI_I2C
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+ help
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+ This is a driver for the BU64754 Motor Driver for Camera
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+ Autofocus. The BU64754GWZ is an actuator driver IC which
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+ can be controlled the actuator position precisely using
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+ with internal Hall Sensor.
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+
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config VIDEO_DW9714
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tristate "DW9714 lens voice coil support"
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depends on I2C && VIDEO_DEV
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--- a/drivers/media/i2c/Makefile
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+++ b/drivers/media/i2c/Makefile
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@@ -26,6 +26,7 @@ obj-$(CONFIG_VIDEO_ARDUCAM_PIVARIETY) +=
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obj-$(CONFIG_VIDEO_BT819) += bt819.o
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obj-$(CONFIG_VIDEO_BT856) += bt856.o
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obj-$(CONFIG_VIDEO_BT866) += bt866.o
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+obj-$(CONFIG_VIDEO_BU64754) += bu64754.o
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obj-$(CONFIG_VIDEO_CCS) += ccs/
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obj-$(CONFIG_VIDEO_CCS_PLL) += ccs-pll.o
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obj-$(CONFIG_VIDEO_CS3308) += cs3308.o
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--- /dev/null
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+++ b/drivers/media/i2c/bu64754.c
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@@ -0,0 +1,315 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * The BU64754GWZ is an actuator driver IC which can control the
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+ * actuator position precisely using an internal Hall Sensor.
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+ */
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+
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+#include <linux/delay.h>
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+#include <linux/i2c.h>
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+#include <linux/module.h>
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+#include <linux/pm_runtime.h>
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+#include <linux/regulator/consumer.h>
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+
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+#include <media/v4l2-cci.h>
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+#include <media/v4l2-ctrls.h>
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+#include <media/v4l2-device.h>
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+
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+#define BU64754_REG_ACTIVE CCI_REG16(0x07)
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+#define BU64754_ACTIVE_MODE 0x8080
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+
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+#define BU64754_REG_SERVE CCI_REG16(0xd9)
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+#define BU64754_SERVE_ON 0x0404
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+
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+#define BU64754_REG_POSITION CCI_REG16(0x45)
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+#define BU64753_POSITION_MAX 1023 /* 0x3ff */
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+#define BU64753_POSITION_STEPS 1
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+
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+#define BU64754_POWER_ON_DELAY 800 /* uS : t1, t3 */
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+
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+struct bu64754 {
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+ struct device *dev;
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+
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+ struct v4l2_ctrl_handler ctrls_vcm;
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+ struct v4l2_subdev sd;
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+ struct regmap *cci;
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+
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+ u16 current_val;
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+ struct regulator *vdd;
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+ struct notifier_block notifier;
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+};
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+
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+static inline struct bu64754 *sd_to_bu64754(struct v4l2_subdev *subdev)
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+{
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+ return container_of(subdev, struct bu64754, sd);
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+}
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+
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+static int bu64754_set(struct bu64754 *bu64754, u16 position)
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+{
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+ int ret;
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+
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+ position &= 0x3ff; /* BU64753_POSITION_MAX */
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+ ret = cci_write(bu64754->cci, BU64754_REG_POSITION, position, NULL);
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+ if (ret) {
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+ dev_err(bu64754->dev, "Set position failed ret=%d\n", ret);
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int bu64754_active(struct bu64754 *bu64754)
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+{
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+ int ret;
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+
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+ /* Power on */
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+ ret = cci_write(bu64754->cci, BU64754_REG_ACTIVE, BU64754_ACTIVE_MODE, NULL);
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+ if (ret < 0) {
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+ dev_err(bu64754->dev, "Failed to set active mode ret = %d\n",
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+ ret);
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+ return ret;
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+ }
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+
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+ /* Serve on */
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+ ret = cci_write(bu64754->cci, BU64754_REG_SERVE, BU64754_SERVE_ON, NULL);
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+ if (ret < 0) {
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+ dev_err(bu64754->dev, "Failed to enable serve ret = %d\n",
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+ ret);
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+ return ret;
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+ }
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+
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+ return bu64754_set(bu64754, bu64754->current_val);
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+}
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+
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+static int bu64754_standby(struct bu64754 *bu64754)
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+{
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+ int ret;
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+
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+ ret = cci_write(bu64754->cci, BU64754_REG_ACTIVE, 0, NULL);
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+ if (ret < 0)
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+ dev_err(bu64754->dev, "Failed to enter standby mode ret = %d\n",
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+ ret);
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+
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+ return ret;
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+}
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+
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+static int bu64754_regulator_event(struct notifier_block *nb,
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+ unsigned long action, void *data)
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+{
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+ struct bu64754 *bu64754 = container_of(nb, struct bu64754, notifier);
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+
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+ if (action & REGULATOR_EVENT_ENABLE) {
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+ /*
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+ * Initialisation delay between VDD low->high and availability
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+ * i2c operation.
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+ */
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+ usleep_range(BU64754_POWER_ON_DELAY,
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+ BU64754_POWER_ON_DELAY + 100);
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+
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+ bu64754_active(bu64754);
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+ } else if (action & REGULATOR_EVENT_PRE_DISABLE) {
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+ bu64754_standby(bu64754);
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+ }
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+
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+ return 0;
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+}
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+
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+static int bu64754_set_ctrl(struct v4l2_ctrl *ctrl)
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+{
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+ struct bu64754 *bu64754 = container_of(ctrl->handler,
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+ struct bu64754, ctrls_vcm);
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+
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+ if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
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+ bu64754->current_val = ctrl->val;
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+ return bu64754_set(bu64754, ctrl->val);
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+ }
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+
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+ return -EINVAL;
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+}
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+
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+static const struct v4l2_ctrl_ops bu64754_vcm_ctrl_ops = {
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+ .s_ctrl = bu64754_set_ctrl,
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+};
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+
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+static int bu64754_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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+{
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+ return pm_runtime_resume_and_get(sd->dev);
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+}
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+
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+static int bu64754_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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+{
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+ pm_runtime_put(sd->dev);
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+ return 0;
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+}
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+
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+static const struct v4l2_subdev_internal_ops bu64754_int_ops = {
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+ .open = bu64754_open,
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+ .close = bu64754_close,
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+};
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+
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+static const struct v4l2_subdev_ops bu64754_ops = { };
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+
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+static void bu64754_subdev_cleanup(struct bu64754 *bu64754)
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+{
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+ v4l2_async_unregister_subdev(&bu64754->sd);
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+ v4l2_ctrl_handler_free(&bu64754->ctrls_vcm);
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+ media_entity_cleanup(&bu64754->sd.entity);
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+}
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+
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+static int bu64754_init_controls(struct bu64754 *bu64754)
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+{
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+ struct v4l2_ctrl_handler *hdl = &bu64754->ctrls_vcm;
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+ const struct v4l2_ctrl_ops *ops = &bu64754_vcm_ctrl_ops;
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+
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+ v4l2_ctrl_handler_init(hdl, 1);
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+
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+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
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+ 0, BU64753_POSITION_MAX, BU64753_POSITION_STEPS,
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+ 0);
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+
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+ bu64754->current_val = 0;
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+
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+ bu64754->sd.ctrl_handler = hdl;
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+ if (hdl->error) {
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+ dev_err(bu64754->dev, "%s fail error: 0x%x\n",
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+ __func__, hdl->error);
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+ return hdl->error;
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+ }
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+
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+ return 0;
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+}
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+
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+static int bu64754_probe(struct i2c_client *client)
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+{
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+ struct bu64754 *bu64754;
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+ int ret;
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+
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+ bu64754 = devm_kzalloc(&client->dev, sizeof(*bu64754), GFP_KERNEL);
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+ if (!bu64754)
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+ return -ENOMEM;
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+
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+ bu64754->dev = &client->dev;
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+
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+ bu64754->cci = devm_cci_regmap_init_i2c(client, 8);
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+ if (IS_ERR(bu64754->cci)) {
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+ dev_err(bu64754->dev, "Failed to initialize CCI\n");
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+ return PTR_ERR(bu64754->cci);
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+ }
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+
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+ bu64754->vdd = devm_regulator_get_optional(&client->dev, "vdd");
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+ if (IS_ERR(bu64754->vdd)) {
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+ if (PTR_ERR(bu64754->vdd) != -ENODEV)
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+ return PTR_ERR(bu64754->vdd);
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+
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+ bu64754->vdd = NULL;
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+ } else {
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+ bu64754->notifier.notifier_call = bu64754_regulator_event;
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+
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+ ret = regulator_register_notifier(bu64754->vdd,
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+ &bu64754->notifier);
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+ if (ret) {
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+ dev_err(bu64754->dev,
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+ "could not register regulator notifier\n");
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+ return ret;
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+ }
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+ }
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+
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+ v4l2_i2c_subdev_init(&bu64754->sd, client, &bu64754_ops);
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+ bu64754->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
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+ bu64754->sd.internal_ops = &bu64754_int_ops;
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+ bu64754->sd.entity.function = MEDIA_ENT_F_LENS;
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+
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+ ret = bu64754_init_controls(bu64754);
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+ if (ret)
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+ goto err_cleanup;
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+
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+ ret = media_entity_pads_init(&bu64754->sd.entity, 0, NULL);
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+ if (ret < 0)
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+ goto err_cleanup;
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+
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+ bu64754->sd.entity.function = MEDIA_ENT_F_LENS;
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+
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+ ret = v4l2_async_register_subdev(&bu64754->sd);
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+ if (ret < 0)
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+ goto err_cleanup;
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+
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+ if (!bu64754->vdd)
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+ pm_runtime_set_active(&client->dev);
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+
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+ pm_runtime_enable(&client->dev);
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+ pm_runtime_idle(&client->dev);
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+
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+ return 0;
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+
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+err_cleanup:
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+ v4l2_ctrl_handler_free(&bu64754->ctrls_vcm);
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+ media_entity_cleanup(&bu64754->sd.entity);
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+
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+ return ret;
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+}
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+
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+static void bu64754_remove(struct i2c_client *client)
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+{
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+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
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+ struct bu64754 *bu64754 = sd_to_bu64754(sd);
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+
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+ if (bu64754->vdd)
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+ regulator_unregister_notifier(bu64754->vdd,
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+ &bu64754->notifier);
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+
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+ pm_runtime_disable(&client->dev);
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+
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+ bu64754_subdev_cleanup(bu64754);
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+}
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+
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+static int __maybe_unused bu64754_vcm_suspend(struct device *dev)
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+{
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+ struct i2c_client *client = to_i2c_client(dev);
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+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
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+ struct bu64754 *bu64754 = sd_to_bu64754(sd);
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+
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+ if (bu64754->vdd)
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+ return regulator_disable(bu64754->vdd);
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+
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+ return bu64754_standby(bu64754);
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+}
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+
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+static int __maybe_unused bu64754_vcm_resume(struct device *dev)
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+{
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+ struct i2c_client *client = to_i2c_client(dev);
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+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
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+ struct bu64754 *bu64754 = sd_to_bu64754(sd);
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+
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+ if (bu64754->vdd)
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+ return regulator_enable(bu64754->vdd);
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+
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+ return bu64754_active(bu64754);
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+}
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+
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+static const struct of_device_id bu64754_of_table[] = {
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+ { .compatible = "rohm,bu64754", },
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+ { /* sentinel */ }
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+};
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+
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+MODULE_DEVICE_TABLE(of, bu64754_of_table);
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+
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+static const struct dev_pm_ops bu64754_pm_ops = {
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+ SET_SYSTEM_SLEEP_PM_OPS(bu64754_vcm_suspend, bu64754_vcm_resume)
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+ SET_RUNTIME_PM_OPS(bu64754_vcm_suspend, bu64754_vcm_resume, NULL)
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+};
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+
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+static struct i2c_driver bu64754_i2c_driver = {
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+ .driver = {
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+ .name = "bu64754",
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+ .pm = &bu64754_pm_ops,
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+ .of_match_table = bu64754_of_table,
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+ },
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+ .probe_new = bu64754_probe,
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+ .remove = bu64754_remove,
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+};
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+
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+module_i2c_driver(bu64754_i2c_driver);
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+
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+MODULE_AUTHOR("Kieran Bingham");
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+MODULE_DESCRIPTION("BU64754 VCM driver");
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+MODULE_LICENSE("GPL");
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+
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