android13/kernel-5.10/drivers/media/i2c/maxim4c/maxim4c_drv.c

699 lines
17 KiB
C

// 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>
*
* V2.0.00 maxim serdes qual 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
*
*/
#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-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#include "maxim4c_api.h"
#define DRIVER_VERSION KERNEL_VERSION(2, 0x00, 0x00)
#define MAXIM4C_XVCLK_FREQ 25000000
/* device compatible */
#define MAXIM4C_MAX96712_COMPAT "maxim4c,max96712"
#define MAXIM4C_MAX96722_COMPAT "maxim4c,max96722"
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++) {
ret = maxim4c_i2c_read_byte(client,
MAXIM4C_REG_CHIP_ID, MAXIM4C_I2C_REG_ADDR_16BITS,
&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 {
dev_err(dev, "Unexpected maxim chipid(%02x)\n", chipid);
return -ENODEV;
}
}
dev_info(dev, "retry (%d) to check local chipid", loop + 1);
msleep(10);
}
dev_err(dev, "maxim check chipid error, ret(%d)\n", ret);
return -ENODEV;
}
static irqreturn_t maxim4c_hot_plug_detect_irq_handler(int irq, void *dev_id)
{
struct maxim4c *maxim4c = dev_id;
struct device *dev = &maxim4c->client->dev;
int lock_gpio_level = 0;
mutex_lock(&maxim4c->mutex);
if (maxim4c->streaming) {
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;
}
queue_delayed_work(maxim4c->hot_plug_work.state_check_wq,
&maxim4c->hot_plug_work.state_d_work,
msecs_to_jiffies(50));
}
mutex_unlock(&maxim4c->mutex);
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);
struct maxim4c *maxim4c =
container_of(hot_plug_work, struct maxim4c, hot_plug_work);
struct device *dev = &maxim4c->client->dev;
u8 curr_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)) {
maxim4c_link_select_remote_control(maxim4c, 0);
}
curr_lock_state = maxim4c_link_get_lock_state(maxim4c, link_enable_mask);
link_lock_change = (last_lock_state ^ curr_lock_state);
if (link_lock_change) {
dev_dbg(dev, "lock state: current = 0x%02x, last = 0x%02x\n",
curr_lock_state, last_lock_state);
maxim4c->link_lock_state = curr_lock_state;
}
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");
maxim4c_remote_devices_init(maxim4c, MAXIM4C_LINK_MASK_A);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "link A plug out\n");
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");
maxim4c_remote_devices_init(maxim4c, MAXIM4C_LINK_MASK_B);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "link B plug out\n");
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");
maxim4c_remote_devices_init(maxim4c, MAXIM4C_LINK_MASK_C);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "link C plug out\n");
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");
maxim4c_remote_devices_init(maxim4c, MAXIM4C_LINK_MASK_D);
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true);
} else {
dev_info(dev, "link D plug out\n");
maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false);
}
}
if (curr_lock_state == link_enable_mask) {
// remote control mask enable
maxim4c_link_select_remote_control(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(100));
}
mutex_unlock(&maxim4c->mutex);
}
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_local_device_power_on(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
if (!IS_ERR(maxim4c->power_gpio)) {
dev_info(dev, "local device power gpio on\n");
gpiod_set_value_cansleep(maxim4c->power_gpio, 1);
usleep_range(5000, 10000);
}
return 0;
}
static void maxim4c_local_device_power_off(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
if (!IS_ERR(maxim4c->power_gpio)) {
dev_info(dev, "local device power gpio off\n");
gpiod_set_value_cansleep(maxim4c->power_gpio, 0);
}
}
static int maxim4c_remote_device_power_on(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
// remote PoC enable
if (!IS_ERR(maxim4c->pocen_gpio)) {
dev_info(dev, "remote device poc gpio on\n");
gpiod_set_value_cansleep(maxim4c->pocen_gpio, 1);
usleep_range(5000, 10000);
}
return 0;
}
static int maxim4c_remote_device_power_off(maxim4c_t *maxim4c)
{
struct device *dev = &maxim4c->client->dev;
// remote PoC enable
if (!IS_ERR(maxim4c->pocen_gpio)) {
dev_info(dev, "remote device poc gpio off\n");
gpiod_set_value_cansleep(maxim4c->pocen_gpio, 0);
}
return 0;
}
static int maxim4c_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct maxim4c *maxim4c = v4l2_get_subdevdata(sd);
return maxim4c_remote_device_power_on(maxim4c);
}
static int maxim4c_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct maxim4c *maxim4c = v4l2_get_subdevdata(sd);
return maxim4c_remote_device_power_off(maxim4c);
}
static const struct dev_pm_ops maxim4c_pm_ops = {
SET_RUNTIME_PM_OPS(
maxim4c_runtime_suspend, maxim4c_runtime_resume, NULL)
};
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)) {
if (!of_device_is_available(init_seq_node)) {
dev_info(dev, "%pOF is disabled\n", 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;
// maxim serdes local
node = of_get_child_by_name(dev->of_node, "serdes-local-device");
if (IS_ERR_OR_NULL(node))
return -ENODEV;
if (!of_device_is_available(node)) {
dev_info(dev, "%pOF is disabled\n", node);
of_node_put(node);
return -ENODEV;
}
/* 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_byte(client,
0x0006, MAXIM4C_I2C_REG_ADDR_16BITS,
0xF0);
if (ret)
return ret;
// MIPI CSI output disable.
ret = maxim4c_i2c_write_byte(client,
0x040B, MAXIM4C_I2C_REG_ADDR_16BITS,
0x00);
if (ret)
return ret;
// MIPI TXPHY standby
ret = maxim4c_i2c_update_byte(client,
0x08A2, MAXIM4C_I2C_REG_ADDR_16BITS,
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_byte(client,
0x00F4, MAXIM4C_I2C_REG_ADDR_16BITS,
0);
// remote control disable all
ret |= maxim4c_link_select_remote_control(maxim4c, 0);
return ret;
}
static int maxim4c_module_hw_init(maxim4c_t *maxim4c)
{
int ret = 0;
ret = maxim4c_module_hw_previnit(maxim4c);
if (ret)
return ret;
ret = maxim4c_link_hw_init(maxim4c);
if (ret)
return ret;
ret = maxim4c_video_pipe_hw_init(maxim4c);
if (ret)
return ret;
ret = maxim4c_mipi_txphy_hw_init(maxim4c);
if (ret)
return ret;
ret = maxim4c_run_extra_init_seq(maxim4c);
if (ret)
return ret;
ret = maxim4c_module_hw_postinit(maxim4c);
if (ret)
return ret;
return 0;
}
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;
const u32 *chip_id = NULL;
int ret = 0;
dev_info(dev, "driver version: %02x.%02x.%02x", DRIVER_VERSION >> 16,
(DRIVER_VERSION & 0xff00) >> 8, DRIVER_VERSION & 0x00ff);
chip_id = of_device_get_match_data(dev);
if (chip_id == NULL) {
dev_err(dev, "maxim4c driver get match data error\n");
return -EINVAL;
}
if (*chip_id == MAX96712_CHIP_ID) {
dev_info(dev, "maxim4c driver for max96712");
} else if (*chip_id == MAX96722_CHIP_ID) {
dev_info(dev, "maxim4c driver for max96722");
} else {
dev_err(dev, "maxim4c driver unknown chip");
return -EINVAL;
}
maxim4c = devm_kzalloc(dev, sizeof(*maxim4c), GFP_KERNEL);
if (!maxim4c)
return -ENOMEM;
maxim4c->client = client;
maxim4c->chipid = *chip_id;
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;
}
maxim4c->power_gpio = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(maxim4c->power_gpio))
dev_warn(dev, "Failed to get power-gpios, maybe no use\n");
maxim4c->pocen_gpio = devm_gpiod_get(dev, "pocen", GPIOD_OUT_LOW);
if (IS_ERR(maxim4c->pocen_gpio))
dev_warn(dev, "Failed to get pocen-gpios\n");
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_local_device_power_on(maxim4c);
if (ret)
goto err_destroy_mutex;
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)
goto err_power_off;
#if MAXIM4C_TEST_PATTERN
ret = maxim4c_pattern_init(maxim4c);
if (ret)
goto err_power_off;
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
return 0;
#endif /* MAXIM4C_TEST_PATTERN */
maxim4c_module_data_init(maxim4c);
maxim4c_module_parse_dt(maxim4c);
ret = maxim4c_module_hw_init(maxim4c);
if (ret)
goto err_subdev_deinit;
ret = maxim4c_remote_mfd_add_devices(maxim4c);
if (ret)
goto err_subdev_deinit;
maxim4c_lock_irq_init(maxim4c);
maxim4c_lock_state_work_init(maxim4c);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
return 0;
err_subdev_deinit:
maxim4c_v4l2_subdev_deinit(maxim4c);
err_power_off:
maxim4c_local_device_power_off(maxim4c);
err_destroy_mutex:
mutex_destroy(&maxim4c->mutex);
return ret;
}
static int maxim4c_remove(struct i2c_client *client)
{
maxim4c_t *maxim4c = i2c_get_clientdata(client);
maxim4c_lock_state_work_deinit(maxim4c);
maxim4c_v4l2_subdev_deinit(maxim4c);
mutex_destroy(&maxim4c->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
maxim4c_local_device_power_off(maxim4c);
pm_runtime_set_suspended(&client->dev);
return 0;
}
#if IS_ENABLED(CONFIG_OF)
static const u32 max96712_chip_id = MAX96712_CHIP_ID;
static const u32 max96722_chip_id = MAX96722_CHIP_ID;
static const struct of_device_id maxim4c_of_match[] = {
{
.compatible = MAXIM4C_MAX96712_COMPAT,
.data = &max96712_chip_id,
}, {
.compatible = MAXIM4C_MAX96722_COMPAT,
.data = &max96722_chip_id,
},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, maxim4c_of_match);
#endif
static const struct i2c_device_id maxim4c_match_id[] = {
{ MAXIM4C_MAX96712_COMPAT, 0 },
{ MAXIM4C_MAX96722_COMPAT, 0 },
{},
};
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,
.id_table = maxim4c_match_id,
};
module_i2c_driver(maxim4c_i2c_driver);
MODULE_AUTHOR("Cai wenzhong <cwz@rock-chips.com>");
MODULE_DESCRIPTION("Maxim qual gmsl deserializer driver");
MODULE_LICENSE("GPL");