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CoolPi-Armbian-Rockchip-RK3.../drivers/media/i2c/maxim/local/maxim4c/maxim4c_drv.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Maxim Quad GMSL2/GMSL1 to CSI-2 Deserializer driver
*
* Copyright (C) 2023 Rockchip Electronics Co., Ltd.
*
* Author: Cai Wenzhong <cwz@rock-chips.com>
*
* V2.00.00 maxim serdes quad GMSL2/GMSL1 driver framework.
* 1. local deserializer support: max96712/max96722
* 2. remote serializer support: max9295/max96715/max96717
* 3. support deserializer and serializer auto adaptive
* 4. support deserializer output test pattern
* 5. support remote serializer I2c address mapping
* 6. support remote serializer hot plug detection and recovery
*
* V2.01.00
* 1. remote device and local link are bound through link id
* 2. support local and remote port chain check
* 3. drivers/media/i2c/maxim4c/Kconfig support menu select
* 4. optimize delay time and error messages
* 5. power control: local by pwdn gpio, remote by pocen gpio
* 6. local pwdn on/off enable depend on MAXIM4C_LOCAL_DES_ON_OFF_EN
*
* V2.02.00
* 1. Force all MIPI clocks running Setting in csi out enable.
* 2. Pattern mode force_clock_out_en default enable.
*
* V2.03.00
* 1. remote device add the maxim4c prefix to driver name.
*
* V2.04.04
* 1. Add regulator supplier dependencies.
* 2. Add config ssc-ratio property
* 3. Add debugfs entry to change MIPI timing
* 4. Use PM runtime autosuspend feature
* 5. Fix unbalanced disabling for PoC regulator
* 6. MIPI VC count does not affected by data lane count
*
* V2.05.00
* 1. local device power on add some delay for i2c normal access.
* 2. enable hot plug detect for partial links are locked.
* 3. remote device hot plug init disable lock irq.
*
* V3.00.00
* 1. deserializer and serializer are associated through i2c-mux
* 2. remote serializer is abstracted as v4l2 subdev
* 3. remote camera is bound to remote serializer
*
* V3.01.00
* 1. fixed remote camera s_stream and s_power api return error.
* 2. compatible with kernel v4.19/v5.10/v6.1
*
* V3.02.00
* 1. support remote dummy sensor
* 2. record the status of the serializer
* 3. remote serializer support more chip id
* 4. support mode add crop rect dts config
*
* V3.03.00
* 1. remote sensor Makefile rename module ko
* 2. remote sensor rename driver name
*
* V3.04.00
* 1. fix g_mbus_config flag setting error for ISP
* 2. support remote raw sensor s_power and s_stream control by cif
* 3. support vicap multi channel to multi ISP mode
*
* V3.05.00
* 1. unified use __v4l2_ctrl_handler_setup in the xxx_start_stream
* 2. support subscribe hot plug detect v4l2 event
*
* V3.06.00
* 1. support multi-channel information configuration
* 2. mode vc initialization when vc-array isn't configured
* 3. fix the issue of mutex deadlock during hot plug
*
* V3.07.00
* 1. v4l2 ioctl add command to support quick stream setting
* 2. dev_pm_ops add suspend and resume for system sleep
*
* V3.08.00
* 1. wait link lock stable when hot plug is detected
* 2. link get lock state retry if i2c error
*
* V3.09.00
* 1. if remote camera not connected, hot plug state check timer working,
* fix the issue of mutex deadlock when stream off.
*
*/
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/version.h>
#include <linux/compat.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/pm_runtime.h>
#include <linux/workqueue.h>
#include <linux/rk-camera-module.h>
#include <linux/gpio/consumer.h>
#include <linux/pinctrl/consumer.h>
#include <linux/regulator/consumer.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-fwnode.h>
#include "maxim4c_api.h"
#define DRIVER_VERSION KERNEL_VERSION(3, 0x09, 0x00)
#define MAXIM4C_NAME "maxim4c"
#define MAXIM4C_XVCLK_FREQ 25000000
static const char *const maxim4c_supply_names[MAXIM4C_NUM_SUPPLIES] = {
"vcc1v2",
"vcc1v8",
};
static int maxim4c_check_local_chipid(maxim4c_t *maxim4c)
{
struct i2c_client *client = maxim4c->client;
struct device *dev = &client->dev;
int ret = 0, loop = 0;
u8 chipid = 0;
for (loop = 0; loop < 5; loop++) {
if (loop != 0) {
dev_info(dev, "check local chipid retry (%d)", loop);
msleep(10);
}
ret = maxim4c_i2c_read_reg(client, MAXIM4C_REG_CHIP_ID, &chipid);
if (ret == 0) {
if (chipid == maxim4c->chipid) {
if (chipid == MAX96712_CHIP_ID) {
dev_info(dev, "MAX96712 is Detected\n");
return 0;
}
if (chipid == MAX96722_CHIP_ID) {
dev_info(dev, "MAX96722 is Detected\n");
return 0;
}
} else {
// if chipid is unexpected, retry
dev_err(dev, "Unexpected maxim chipid = %02x\n", chipid);
}
}
}
dev_err(dev, "maxim check chipid error, ret(%d)\n", ret);
return -ENODEV;
}
static void maxim4c_hot_plug_event_report(maxim4c_t *maxim4c, int data)
{
struct v4l2_subdev *sd = &maxim4c->subdev;
struct device *dev = &maxim4c->client->dev;
struct v4l2_event evt_hot_plug = {
.type = V4L2_EVENT_HOT_PLUG,
.u.data[0] = data,
};
dev_dbg(dev, "%s data %d\n", __func__, data);
v4l2_event_queue(sd->devnode, &evt_hot_plug);
}
static irqreturn_t maxim4c_hot_plug_detect_irq_handler(int irq, void *dev_id)
{
maxim4c_t *maxim4c = dev_id;
struct device *dev = &maxim4c->client->dev;
int lock_gpio_level = 0;
mutex_lock(&maxim4c->mutex);
if (maxim4c->streaming == 0) {
mutex_unlock(&maxim4c->mutex);
return IRQ_HANDLED;
}
lock_gpio_level = gpiod_get_value_cansleep(maxim4c->lock_gpio);
if (lock_gpio_level == 0) {
dev_info(dev, "serializer hot plug out\n");
maxim4c->hot_plug_state = MAXIM4C_HOT_PLUG_OUT;
} else {
dev_info(dev, "serializer hot plug in\n");
maxim4c->hot_plug_state = MAXIM4C_HOT_PLUG_IN;
}
mutex_unlock(&maxim4c->mutex);
queue_delayed_work(maxim4c->hot_plug_work.state_check_wq,
&maxim4c->hot_plug_work.state_d_work,
msecs_to_jiffies(100));
return IRQ_HANDLED;
}
static void maxim4c_lock_irq_init(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
int ret = 0;
if (!IS_ERR(maxim4c->lock_gpio)) {
maxim4c->hot_plug_irq = gpiod_to_irq(maxim4c->lock_gpio);
if (maxim4c->hot_plug_irq < 0) {
dev_err(dev, "failed to get hot plug irq\n");
} else {
ret = devm_request_threaded_irq(dev,
maxim4c->hot_plug_irq,
NULL,
maxim4c_hot_plug_detect_irq_handler,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"maxim4c_hot_plug",
maxim4c);
if (ret) {
dev_err(dev, "failed to request hot plug irq (%d)\n", ret);
maxim4c->hot_plug_irq = -1;
} else {
disable_irq(maxim4c->hot_plug_irq);
}
}
}
}
static void maxim4c_hot_plug_state_check_work(struct work_struct *work)
{
struct maxim4c_hot_plug_work *hot_plug_work =
container_of(work, struct maxim4c_hot_plug_work, state_d_work.work);
maxim4c_t *maxim4c =
container_of(hot_plug_work, struct maxim4c, hot_plug_work);
struct device *dev = &maxim4c->client->dev;
u8 curr_lock_state = 0, retry_lock_state = 0, last_lock_state = 0, link_lock_change = 0;
u8 link_enable_mask = 0, link_id = 0;
dev_dbg(dev, "%s\n", __func__);
mutex_lock(&maxim4c->mutex);
if (maxim4c->streaming == 0) {
mutex_unlock(&maxim4c->mutex);
return;
}
link_enable_mask = maxim4c->gmsl_link.link_enable_mask;
last_lock_state = maxim4c->link_lock_state;
if ((maxim4c->hot_plug_state == MAXIM4C_HOT_PLUG_OUT)
&& (last_lock_state == link_enable_mask)) {
// i2c mux enable: disable all remote channel
dev_info(dev, "disable all remote channel\n");
maxim4c_i2c_mux_enable(maxim4c, 0x00);
}
curr_lock_state = maxim4c_link_get_lock_state(maxim4c, link_enable_mask);
// Link lock state maybe detect error when hot plug, first check i2c io status
if (curr_lock_state != last_lock_state) {
// delay 100ms for link lock stable
usleep_range(100000, 110000);
retry_lock_state = maxim4c_link_get_lock_state(maxim4c, link_enable_mask);
if (retry_lock_state != curr_lock_state) {
dev_info(dev, "link lock retry: 0x%02x -> 0x%02x\n",
curr_lock_state, retry_lock_state);
curr_lock_state = retry_lock_state;
}
}
link_lock_change = (last_lock_state ^ curr_lock_state);
if (link_lock_change) {
dev_info(dev, "lock state: current = 0x%02x, last = 0x%02x\n",
curr_lock_state, last_lock_state);
maxim4c_hot_plug_event_report(maxim4c, curr_lock_state);
maxim4c->link_lock_state = curr_lock_state;
}
mutex_unlock(&maxim4c->mutex);
if (link_lock_change & MAXIM4C_LINK_MASK_A) {
link_id = MAXIM4C_LINK_ID_A;
if (curr_lock_state & MAXIM4C_LINK_MASK_A) {
dev_info(dev, "Link A plug in\n");
if (maxim4c->hot_plug_irq > 0)
disable_irq(maxim4c->hot_plug_irq);
// Link A remote device start stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_A, 1);
if (maxim4c->hot_plug_irq > 0)
enable_irq(maxim4c->hot_plug_irq);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "Link A plug out\n");
// Link A remote device stop stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_A, 0);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false);
}
}
if (link_lock_change & MAXIM4C_LINK_MASK_B) {
link_id = MAXIM4C_LINK_ID_B;
if (curr_lock_state & MAXIM4C_LINK_MASK_B) {
dev_info(dev, "Link B plug in\n");
if (maxim4c->hot_plug_irq > 0)
disable_irq(maxim4c->hot_plug_irq);
// Link B remote device start stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_B, 1);
if (maxim4c->hot_plug_irq > 0)
enable_irq(maxim4c->hot_plug_irq);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "Link B plug out\n");
// Link B remote device stop stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_B, 0);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false);
}
}
if (link_lock_change & MAXIM4C_LINK_MASK_C) {
link_id = MAXIM4C_LINK_ID_C;
if (curr_lock_state & MAXIM4C_LINK_MASK_C) {
dev_info(dev, "Link C plug in\n");
if (maxim4c->hot_plug_irq > 0)
disable_irq(maxim4c->hot_plug_irq);
// Link C remote device start stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_C, 1);
if (maxim4c->hot_plug_irq > 0)
enable_irq(maxim4c->hot_plug_irq);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "Link C plug out\n");
// Link C remote device stop stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_C, 0);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false);
}
}
if (link_lock_change & MAXIM4C_LINK_MASK_D) {
link_id = MAXIM4C_LINK_ID_D;
if (curr_lock_state & MAXIM4C_LINK_MASK_D) {
dev_info(dev, "Link D plug in\n");
if (maxim4c->hot_plug_irq > 0)
disable_irq(maxim4c->hot_plug_irq);
// Link D remote device start stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_D, 1);
if (maxim4c->hot_plug_irq > 0)
enable_irq(maxim4c->hot_plug_irq);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "Link D plug out\n");
// Link D remote device stop stream
maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_D, 0);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false);
}
}
if (curr_lock_state == link_enable_mask) {
// i2c mux enable: enable all enabled link for remote control
maxim4c_i2c_mux_enable(maxim4c, link_enable_mask);
} else {
queue_delayed_work(maxim4c->hot_plug_work.state_check_wq,
&maxim4c->hot_plug_work.state_d_work,
msecs_to_jiffies(200));
}
}
int maxim4c_hot_plug_detect_work_start(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
u8 link_lock_state = 0, link_enable_mask = 0;
link_lock_state = maxim4c->link_lock_state;
link_enable_mask = maxim4c->gmsl_link.link_enable_mask;
if (link_lock_state != link_enable_mask) {
dev_info(dev, "%s: link_lock = 0x%02x, link_mask = 0x%02x\n",
__func__, link_lock_state, link_enable_mask);
maxim4c->hot_plug_state = MAXIM4C_HOT_PLUG_OUT;
queue_delayed_work(maxim4c->hot_plug_work.state_check_wq,
&maxim4c->hot_plug_work.state_d_work,
msecs_to_jiffies(200));
}
return 0;
}
static int maxim4c_lock_state_work_init(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
INIT_DELAYED_WORK(&maxim4c->hot_plug_work.state_d_work,
maxim4c_hot_plug_state_check_work);
maxim4c->hot_plug_work.state_check_wq =
create_singlethread_workqueue("maxim4c work queue");
if (maxim4c->hot_plug_work.state_check_wq == NULL) {
dev_err(dev, "failed to create hot plug work queue\n");
return -ENOMEM;
}
return 0;
}
static int maxim4c_lock_state_work_deinit(maxim4c_t *maxim4c)
{
if (maxim4c->hot_plug_work.state_check_wq) {
cancel_delayed_work_sync(&maxim4c->hot_plug_work.state_d_work);
destroy_workqueue(maxim4c->hot_plug_work.state_check_wq);
maxim4c->hot_plug_work.state_check_wq = NULL;
}
return 0;
}
/* Calculate the delay in us by clock rate and clock cycles */
static inline u32 maxim4c_cal_delay(u32 cycles)
{
return DIV_ROUND_UP(cycles, MAXIM4C_XVCLK_FREQ / 1000 / 1000);
}
static int maxim4c_device_power_on(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
int ret = 0;
ret = regulator_bulk_enable(MAXIM4C_NUM_SUPPLIES, maxim4c->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators\n");
return -EINVAL;
}
ret = regulator_enable(maxim4c->pwdn_regulator);
if (ret < 0) {
dev_err(dev, "Unable to turn pwdn regulator on\n");
return ret;
}
return 0;
}
static void maxim4c_device_power_off(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
int ret = 0;
ret = regulator_disable(maxim4c->pwdn_regulator);
if (ret < 0)
dev_warn(dev, "Unable to turn pwdn regulator off\n");
ret = regulator_bulk_disable(MAXIM4C_NUM_SUPPLIES, maxim4c->supplies);
if (ret < 0) {
dev_warn(dev, "Failed to disable regulators\n");
}
}
static int maxim4c_runtime_resume(struct device *dev)
{
#if MAXIM4C_LOCAL_DES_ON_OFF_EN
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
maxim4c_t *maxim4c = v4l2_get_subdevdata(sd);
int ret = 0;
ret |= maxim4c_device_power_on(maxim4c);
return ret;
#else
return 0;
#endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */
}
static int maxim4c_runtime_suspend(struct device *dev)
{
#if MAXIM4C_LOCAL_DES_ON_OFF_EN
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
maxim4c_t *maxim4c = v4l2_get_subdevdata(sd);
int ret = 0;
maxim4c_device_power_off(maxim4c);
return ret;
#else
return 0;
#endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */
}
static int __maybe_unused maxim4c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
maxim4c_t *maxim4c = v4l2_get_subdevdata(sd);
int ret = 0;
dev_info(dev, "maxim4c resume\n");
#if (MAXIM4C_LOCAL_DES_ON_OFF_EN == 0)
#if MAXIM4C_TEST_PATTERN
ret = maxim4c_pattern_hw_init(maxim4c);
if (ret) {
dev_err(dev, "test pattern hw init error\n");
return ret;
}
#else
ret = maxim4c_module_hw_init(maxim4c);
if (ret) {
dev_err(dev, "maxim4c module hw init error\n");
return ret;
}
#endif /* MAXIM4C_TEST_PATTERN */
#endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */
return 0;
}
static int __maybe_unused maxim4c_suspend(struct device *dev)
{
return 0;
}
static const struct dev_pm_ops maxim4c_pm_ops = {
SET_RUNTIME_PM_OPS(
maxim4c_runtime_suspend, maxim4c_runtime_resume, NULL)
SET_LATE_SYSTEM_SLEEP_PM_OPS(maxim4c_suspend, maxim4c_resume)
};
static void maxim4c_module_data_init(maxim4c_t *maxim4c)
{
maxim4c_link_data_init(maxim4c);
maxim4c_video_pipe_data_init(maxim4c);
maxim4c_mipi_txphy_data_init(maxim4c);
}
static int maxim4c_extra_init_seq_parse(maxim4c_t *maxim4c, struct device_node *node)
{
struct device *dev = &maxim4c->client->dev;
struct device_node *init_seq_node = NULL;
struct maxim4c_i2c_init_seq *init_seq = NULL;
init_seq_node = of_get_child_by_name(node, "extra-init-sequence");
if (IS_ERR_OR_NULL(init_seq_node)) {
dev_dbg(dev, "%pOF no child node extra-init-sequence\n", node);
return 0;
}
if (!of_device_is_available(init_seq_node)) {
dev_dbg(dev, "%pOF is disabled\n", init_seq_node);
of_node_put(init_seq_node);
return 0;
}
dev_info(dev, "load extra-init-sequence\n");
init_seq = &maxim4c->extra_init_seq;
maxim4c_i2c_load_init_seq(dev,
init_seq_node, init_seq);
of_node_put(init_seq_node);
return 0;
}
static int maxim4c_module_parse_dt(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
struct device_node *node = NULL;
u32 value = 0;
int ret = 0;
// maxim serdes local
node = of_get_child_by_name(dev->of_node, "serdes-local-device");
if (IS_ERR_OR_NULL(node)) {
dev_err(dev, "%pOF has no child node: serdes-local-device\n",
dev->of_node);
return -ENODEV;
}
if (!of_device_is_available(node)) {
dev_info(dev, "%pOF is disabled\n", node);
of_node_put(node);
return -ENODEV;
}
ret = of_property_read_u32(node, "remote-routing-to-isp", &value);
if (ret == 0) {
dev_info(dev, "remote-routing-to-isp property: %d\n", value);
maxim4c->remote_routing_to_isp = value;
}
/* gmsl link parse dt */
maxim4c_link_parse_dt(maxim4c, node);
/* video pipe parse dt */
maxim4c_video_pipe_parse_dt(maxim4c, node);
/* mipi txphy parse dt */
maxim4c_mipi_txphy_parse_dt(maxim4c, node);
/* extra init seq parse dt */
maxim4c_extra_init_seq_parse(maxim4c, node);
of_node_put(node);
return 0;
}
static int maxim4c_run_extra_init_seq(maxim4c_t *maxim4c)
{
struct i2c_client *client = maxim4c->client;
struct device *dev = &client->dev;
int ret = 0;
ret = maxim4c_i2c_run_init_seq(client,
&maxim4c->extra_init_seq);
if (ret) {
dev_err(dev, "extra init sequence error\n");
return ret;
}
return 0;
}
static int maxim4c_module_hw_previnit(maxim4c_t *maxim4c)
{
struct i2c_client *client = maxim4c->client;
int ret = 0;
// All links disable at beginning.
ret = maxim4c_i2c_write_reg(client, 0x0006, 0xF0);
if (ret)
return ret;
// MIPI CSI output disable.
ret = maxim4c_i2c_write_reg(client, 0x040B, 0x00);
if (ret)
return ret;
// MIPI TXPHY standby
ret = maxim4c_i2c_update_reg(client, 0x08A2, 0xF0, 0x00);
if (ret)
return ret;
return 0;
}
static int maxim4c_module_hw_postinit(maxim4c_t *maxim4c)
{
struct i2c_client *client = maxim4c->client;
int ret = 0;
// video pipe disable all
ret |= maxim4c_i2c_write_reg(client, 0x00F4, 0);
// remote control disable all
ret |= maxim4c_link_select_remote_control(maxim4c, 0);
return ret;
}
int maxim4c_module_hw_init(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
int ret = 0;
ret = maxim4c_module_hw_previnit(maxim4c);
if (ret) {
dev_err(dev, "%s: hw prev init error\n", __func__);
return ret;
}
ret = maxim4c_link_hw_init(maxim4c);
if (ret) {
dev_err(dev, "%s: hw link init error\n", __func__);
return ret;
}
ret = maxim4c_video_pipe_hw_init(maxim4c);
if (ret) {
dev_err(dev, "%s: hw pipe init error\n", __func__);
return ret;
}
ret = maxim4c_mipi_txphy_hw_init(maxim4c);
if (ret) {
dev_err(dev, "%s: hw txphy init error\n", __func__);
return ret;
}
ret = maxim4c_run_extra_init_seq(maxim4c);
if (ret) {
dev_err(dev, "%s: run extra init seq error\n", __func__);
return ret;
}
ret = maxim4c_module_hw_postinit(maxim4c);
if (ret) {
dev_err(dev, "%s: hw post init error\n", __func__);
return ret;
}
return 0;
}
EXPORT_SYMBOL(maxim4c_module_hw_init);
static int maxim4c_configure_regulators(maxim4c_t *maxim4c)
{
unsigned int i;
for (i = 0; i < MAXIM4C_NUM_SUPPLIES; i++)
maxim4c->supplies[i].supply = maxim4c_supply_names[i];
return devm_regulator_bulk_get(&maxim4c->client->dev,
MAXIM4C_NUM_SUPPLIES,
maxim4c->supplies);
}
static int maxim4c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device_node *node = dev->of_node;
maxim4c_t *maxim4c = NULL;
u32 chip_id;
int ret = 0;
dev_info(dev, "driver version: %02x.%02x.%02x", DRIVER_VERSION >> 16,
(DRIVER_VERSION & 0xff00) >> 8, DRIVER_VERSION & 0x00ff);
chip_id = (uintptr_t)of_device_get_match_data(dev);
if (chip_id == MAX96712_CHIP_ID) {
dev_info(dev, "maxim4c driver for max96712\n");
} else if (chip_id == MAX96722_CHIP_ID) {
dev_info(dev, "maxim4c driver for max96722\n");
} else {
dev_err(dev, "maxim4c driver unknown chip\n");
return -EINVAL;
}
maxim4c = devm_kzalloc(dev, sizeof(*maxim4c), GFP_KERNEL);
if (!maxim4c) {
dev_err(dev, "maxim4c probe no memory error\n");
return -ENOMEM;
}
maxim4c->client = client;
maxim4c->chipid = chip_id;
maxim4c->sensor_name = MAXIM4C_NAME;
ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
&maxim4c->module_index);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
&maxim4c->module_facing);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
&maxim4c->module_name);
ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
&maxim4c->len_name);
if (ret) {
dev_err(dev, "could not get module information!\n");
return -EINVAL;
}
ret = maxim4c_configure_regulators(maxim4c);
if (ret) {
dev_err(dev, "Failed to get power regulators\n");
return ret;
}
maxim4c->pwdn_regulator = devm_regulator_get(dev, "pwdn");
if (IS_ERR(maxim4c->pwdn_regulator)) {
if (PTR_ERR(maxim4c->pwdn_regulator) != -EPROBE_DEFER)
dev_err(dev, "Unable to get pwdn regulator (%ld)\n",
PTR_ERR(maxim4c->pwdn_regulator));
else
dev_err(dev, "Get pwdn regulator deferred\n");
ret = PTR_ERR(maxim4c->pwdn_regulator);
return ret;
}
maxim4c->lock_gpio = devm_gpiod_get(dev, "lock", GPIOD_IN);
if (IS_ERR(maxim4c->lock_gpio))
dev_warn(dev, "Failed to get lock-gpios\n");
mutex_init(&maxim4c->mutex);
ret = maxim4c_device_power_on(maxim4c);
if (ret)
goto err_destroy_mutex;
pm_runtime_set_active(dev);
pm_runtime_get_noresume(dev);
pm_runtime_enable(dev);
ret = maxim4c_check_local_chipid(maxim4c);
if (ret)
goto err_power_off;
/*
* client->dev->driver_data = subdev
* subdev->dev->driver_data = maxim4c
*/
ret = maxim4c_v4l2_subdev_init(maxim4c);
if (ret) {
dev_err(dev, "maxim4c probe v4l2 subdev init error\n");
goto err_power_off;
}
/* maxim4c test pattern */
#if MAXIM4C_TEST_PATTERN
ret = maxim4c_pattern_data_init(maxim4c);
if (ret)
goto err_power_off;
#if (MAXIM4C_LOCAL_DES_ON_OFF_EN == 0)
ret = maxim4c_pattern_hw_init(maxim4c);
if (ret)
goto err_power_off;
#endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */
pm_runtime_set_autosuspend_delay(dev, 1000);
pm_runtime_use_autosuspend(dev);
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return 0;
#endif /* MAXIM4C_TEST_PATTERN */
maxim4c_module_data_init(maxim4c);
maxim4c_module_parse_dt(maxim4c);
ret = maxim4c_dbgfs_init(maxim4c);
if (ret)
goto err_subdev_deinit;
#if (MAXIM4C_LOCAL_DES_ON_OFF_EN == 0)
ret = maxim4c_module_hw_init(maxim4c);
if (ret)
goto err_dbgfs_deinit;
#endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */
ret = maxim4c_i2c_mux_init(maxim4c);
if (ret)
goto err_dbgfs_deinit;
// i2c mux enable: default disable all remote channel
maxim4c_i2c_mux_enable(maxim4c, 0x00);
maxim4c_lock_irq_init(maxim4c);
maxim4c_lock_state_work_init(maxim4c);
pm_runtime_set_autosuspend_delay(dev, 1000);
pm_runtime_use_autosuspend(dev);
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return 0;
err_dbgfs_deinit:
maxim4c_dbgfs_deinit(maxim4c);
err_subdev_deinit:
maxim4c_v4l2_subdev_deinit(maxim4c);
err_power_off:
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
maxim4c_device_power_off(maxim4c);
err_destroy_mutex:
mutex_destroy(&maxim4c->mutex);
return ret;
}
#if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE
static int maxim4c_remove(struct i2c_client *client)
#else
static void maxim4c_remove(struct i2c_client *client)
#endif
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
maxim4c_t *maxim4c = v4l2_get_subdevdata(sd);
maxim4c_lock_state_work_deinit(maxim4c);
maxim4c_dbgfs_deinit(maxim4c);
maxim4c_v4l2_subdev_deinit(maxim4c);
maxim4c_i2c_mux_deinit(maxim4c);
mutex_destroy(&maxim4c->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
maxim4c_device_power_off(maxim4c);
pm_runtime_set_suspended(&client->dev);
#if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE
return 0;
#endif
}
static const struct of_device_id maxim4c_of_match[] = {
{
.compatible = "maxim4c,max96712",
.data = (const void *)MAX96712_CHIP_ID
}, {
.compatible = "maxim4c,max96722",
.data = (const void *)MAX96722_CHIP_ID
},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, maxim4c_of_match);
static struct i2c_driver maxim4c_i2c_driver = {
.driver = {
.name = MAXIM4C_NAME,
.pm = &maxim4c_pm_ops,
.of_match_table = of_match_ptr(maxim4c_of_match),
},
.probe = &maxim4c_probe,
.remove = &maxim4c_remove,
};
module_i2c_driver(maxim4c_i2c_driver);
MODULE_AUTHOR("Cai Wenzhong <cwz@rock-chips.com>");
MODULE_DESCRIPTION("Maxim quad gmsl deserializer driver");
MODULE_LICENSE("GPL");
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