mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-19 13:48:06 +00:00
8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
224 lines
6.8 KiB
Diff
224 lines
6.8 KiB
Diff
From e6cdf44892f5f2c18d08e3034facd2f5f19a436f Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
Date: Tue, 3 Jan 2023 15:38:08 +0000
|
|
Subject: [PATCH 0403/1085] media: dw9807-vcm: Add support for DW9817
|
|
bidirectional VCM driver
|
|
|
|
The DW9817 is effectively the same as DW9807 from a programming
|
|
interface, however it drives +/-100mA instead of 0-100mA. This means
|
|
that the power on ramp needs to take the lens from the midpoint, and
|
|
power off return it there. It also changes the default position for
|
|
the module.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
---
|
|
drivers/media/i2c/dw9807-vcm.c | 115 +++++++++++++++++++++++++--------
|
|
1 file changed, 88 insertions(+), 27 deletions(-)
|
|
|
|
--- a/drivers/media/i2c/dw9807-vcm.c
|
|
+++ b/drivers/media/i2c/dw9807-vcm.c
|
|
@@ -1,6 +1,14 @@
|
|
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2018 Intel Corporation
|
|
|
|
+/*
|
|
+ * DW9807 is a 10-bit DAC driver, capable of sinking up to 100mA.
|
|
+ *
|
|
+ * DW9817 is a bidirectional 10-bit driver, driving up to +/- 100mA.
|
|
+ * Operationally it is identical to DW9807, except that the idle position is
|
|
+ * the mid-point, not 0.
|
|
+ */
|
|
+
|
|
#include <linux/acpi.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/i2c.h>
|
|
@@ -38,10 +46,16 @@
|
|
|
|
#define MAX_RETRY 10
|
|
|
|
+struct dw9807_cfg {
|
|
+ unsigned int idle_pos;
|
|
+ unsigned int default_pos;
|
|
+};
|
|
+
|
|
struct dw9807_device {
|
|
struct v4l2_ctrl_handler ctrls_vcm;
|
|
struct v4l2_subdev sd;
|
|
u16 current_val;
|
|
+ u16 idle_pos;
|
|
};
|
|
|
|
static inline struct dw9807_device *sd_to_dw9807_vcm(
|
|
@@ -109,6 +123,40 @@ static int dw9807_set_dac(struct i2c_cli
|
|
return 0;
|
|
}
|
|
|
|
+/*
|
|
+ * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
|
|
+ * to make the movements smoothly. In all cases, even when "start" and
|
|
+ * "end" are the same, the lens will be set to the "end" position.
|
|
+ *
|
|
+ * (We don't use hardware slew rate control, because it differs widely
|
|
+ * between otherwise-compatible ICs, and may need lens-specific tuning.)
|
|
+ */
|
|
+static int dw9807_ramp(struct i2c_client *client, int start, int end)
|
|
+{
|
|
+ int step, val, ret;
|
|
+
|
|
+ if (start < end)
|
|
+ step = DW9807_CTRL_STEPS;
|
|
+ else
|
|
+ step = -DW9807_CTRL_STEPS;
|
|
+
|
|
+ val = start;
|
|
+ while (true) {
|
|
+ val += step;
|
|
+ if (step * (val - end) >= 0)
|
|
+ val = end;
|
|
+ ret = dw9807_set_dac(client, val);
|
|
+ if (ret)
|
|
+ dev_err_ratelimited(&client->dev, "%s I2C failure: %d",
|
|
+ __func__, ret);
|
|
+ if (val == end)
|
|
+ break;
|
|
+ usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
|
|
+ }
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
static int dw9807_set_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct dw9807_device *dev_vcm = container_of(ctrl->handler,
|
|
@@ -118,7 +166,7 @@ static int dw9807_set_ctrl(struct v4l2_c
|
|
struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
|
|
|
|
dev_vcm->current_val = ctrl->val;
|
|
- return dw9807_set_dac(client, ctrl->val);
|
|
+ return dw9807_ramp(client, ctrl->val, ctrl->val);
|
|
}
|
|
|
|
return -EINVAL;
|
|
@@ -163,7 +211,8 @@ static int dw9807_init_controls(struct d
|
|
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);
|
|
+ 0, DW9807_MAX_FOCUS_POS, DW9807_FOCUS_STEPS,
|
|
+ dev_vcm->current_val);
|
|
|
|
dev_vcm->sd.ctrl_handler = hdl;
|
|
if (hdl->error) {
|
|
@@ -175,9 +224,32 @@ static int dw9807_init_controls(struct d
|
|
return 0;
|
|
}
|
|
|
|
+/* Compatible devices; in fact there are many similar chips.
|
|
+ * "data" holds the powered-off (zero current) lens position and a
|
|
+ * default/initial control value (which need not be the same as the powered-off
|
|
+ * value).
|
|
+ */
|
|
+static const struct dw9807_cfg dw9807_cfg = {
|
|
+ .idle_pos = 0,
|
|
+ .default_pos = 0
|
|
+};
|
|
+
|
|
+static const struct dw9807_cfg dw9817_cfg = {
|
|
+ .idle_pos = 512,
|
|
+ .default_pos = 480,
|
|
+};
|
|
+
|
|
+static const struct of_device_id dw9807_of_table[] = {
|
|
+ { .compatible = "dongwoon,dw9807-vcm", .data = &dw9807_cfg },
|
|
+ { .compatible = "dongwoon,dw9817-vcm", .data = &dw9817_cfg },
|
|
+ { /* sentinel */ }
|
|
+};
|
|
+
|
|
static int dw9807_probe(struct i2c_client *client)
|
|
{
|
|
struct dw9807_device *dw9807_dev;
|
|
+ const struct of_device_id *match;
|
|
+ const struct dw9807_cfg *cfg;
|
|
int rval;
|
|
|
|
dw9807_dev = devm_kzalloc(&client->dev, sizeof(*dw9807_dev),
|
|
@@ -185,6 +257,13 @@ static int dw9807_probe(struct i2c_clien
|
|
if (dw9807_dev == NULL)
|
|
return -ENOMEM;
|
|
|
|
+ match = i2c_of_match_device(dw9807_of_table, client);
|
|
+ if (match) {
|
|
+ cfg = (const struct dw9807_cfg *)match->data;
|
|
+ dw9807_dev->idle_pos = cfg->idle_pos;
|
|
+ dw9807_dev->current_val = cfg->default_pos;
|
|
+ }
|
|
+
|
|
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;
|
|
@@ -203,7 +282,8 @@ static int dw9807_probe(struct i2c_clien
|
|
if (rval < 0)
|
|
goto err_cleanup;
|
|
|
|
- pm_runtime_set_active(&client->dev);
|
|
+ if (!dw9807_dev->vdd)
|
|
+ pm_runtime_set_active(&client->dev);
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_idle(&client->dev);
|
|
|
|
@@ -237,15 +317,10 @@ static int __maybe_unused dw9807_vcm_sus
|
|
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;
|
|
+ int ret;
|
|
|
|
- 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);
|
|
- }
|
|
+ if (abs(dw9807_dev->current_val - dw9807_dev->idle_pos) > DW9807_CTRL_STEPS)
|
|
+ dw9807_ramp(client, dw9807_dev->current_val, dw9807_dev->idle_pos);
|
|
|
|
/* Power down */
|
|
ret = i2c_master_send(client, tx_data, sizeof(tx_data));
|
|
@@ -269,7 +344,7 @@ static int __maybe_unused dw9807_vcm_re
|
|
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;
|
|
+ int ret;
|
|
|
|
/* Power on */
|
|
ret = i2c_master_send(client, tx_data, sizeof(tx_data));
|
|
@@ -278,25 +353,11 @@ static int __maybe_unused dw9807_vcm_re
|
|
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);
|
|
- }
|
|
+ dw9807_ramp(client, dw9807_dev->idle_pos, dw9807_dev->current_val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
-static const struct of_device_id dw9807_of_table[] = {
|
|
- { .compatible = "dongwoon,dw9807-vcm" },
|
|
- /* Compatibility for older firmware, NEVER USE THIS IN FIRMWARE! */
|
|
- { .compatible = "dongwoon,dw9807" },
|
|
- { /* sentinel */ }
|
|
-};
|
|
MODULE_DEVICE_TABLE(of, dw9807_of_table);
|
|
|
|
static const struct dev_pm_ops dw9807_pm_ops = {
|