311 lines
6.8 KiB
C
311 lines
6.8 KiB
C
/*
|
|
* Copyright 2017 NXP
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/imx_rpmsg.h>
|
|
#include <linux/input.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_qos.h>
|
|
#include <linux/rpmsg.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/virtio.h>
|
|
|
|
#define RPMSG_TIMEOUT 1000
|
|
|
|
enum key_cmd_type {
|
|
KEY_RPMSG_SETUP,
|
|
KEY_RPMSG_REPLY,
|
|
KEY_RPMSG_NOTIFY,
|
|
};
|
|
|
|
enum keys_type {
|
|
KEY_PRESS = 1,
|
|
KEY_RELEASE,
|
|
KEY_BOTH,
|
|
};
|
|
|
|
struct key_rpmsg_data {
|
|
struct imx_rpmsg_head header;
|
|
u8 key_index;
|
|
union {
|
|
u8 event;
|
|
u8 retcode;
|
|
};
|
|
u8 wakeup;
|
|
} __attribute__((packed));
|
|
|
|
struct rpmsg_keys_button {
|
|
unsigned int code;
|
|
enum keys_type type;
|
|
int wakeup;
|
|
struct input_dev *input;
|
|
};
|
|
|
|
struct rpmsg_keys_drvdata {
|
|
struct input_dev *input;
|
|
struct rpmsg_device *rpdev;
|
|
struct device *dev;
|
|
struct key_rpmsg_data *msg;
|
|
bool ack;
|
|
struct pm_qos_request pm_qos_req;
|
|
struct delayed_work keysetup_work;
|
|
struct completion cmd_complete;
|
|
int nbuttons;
|
|
struct rpmsg_keys_button buttons[0];
|
|
};
|
|
|
|
static struct rpmsg_keys_drvdata *keys_rpmsg;
|
|
|
|
static int key_send_message(struct key_rpmsg_data *msg,
|
|
struct rpmsg_keys_drvdata *info, bool ack)
|
|
{
|
|
int err;
|
|
|
|
if (!info->rpdev) {
|
|
dev_dbg(info->dev,
|
|
"rpmsg channel not ready, m4 image ready?\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pm_qos_add_request(&info->pm_qos_req,
|
|
PM_QOS_CPU_DMA_LATENCY, 0);
|
|
|
|
if (ack) {
|
|
info->ack = true;
|
|
reinit_completion(&info->cmd_complete);
|
|
}
|
|
|
|
err = rpmsg_send(info->rpdev->ept, (void *)msg,
|
|
sizeof(struct key_rpmsg_data));
|
|
if (err) {
|
|
dev_err(&info->rpdev->dev, "rpmsg_send failed: %d\n", err);
|
|
goto err_out;
|
|
}
|
|
|
|
if (ack) {
|
|
err = wait_for_completion_timeout(&info->cmd_complete,
|
|
msecs_to_jiffies(RPMSG_TIMEOUT));
|
|
if (!err) {
|
|
dev_err(&info->rpdev->dev, "rpmsg_send timeout!\n");
|
|
err = -ETIMEDOUT;
|
|
goto err_out;
|
|
}
|
|
|
|
if (info->msg->retcode != 0) {
|
|
dev_err(&info->rpdev->dev, "rpmsg not ack %d!\n",
|
|
info->msg->retcode);
|
|
err = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
err = 0;
|
|
}
|
|
|
|
err_out:
|
|
info->ack = true;
|
|
pm_qos_remove_request(&info->pm_qos_req);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int keys_rpmsg_cb(struct rpmsg_device *rpdev,
|
|
void *data, int len, void *priv, u32 src)
|
|
{
|
|
struct key_rpmsg_data *msg = (struct key_rpmsg_data *)data;
|
|
|
|
if (msg->header.type == KEY_RPMSG_REPLY) {
|
|
keys_rpmsg->msg = msg;
|
|
complete(&keys_rpmsg->cmd_complete);
|
|
return 0;
|
|
} else if (msg->header.type == KEY_RPMSG_NOTIFY) {
|
|
keys_rpmsg->msg = msg;
|
|
keys_rpmsg->ack = false;
|
|
} else
|
|
dev_err(&keys_rpmsg->rpdev->dev, "wrong command type!\n");
|
|
|
|
input_event(keys_rpmsg->input, EV_KEY, msg->key_index, msg->event);
|
|
input_sync(keys_rpmsg->input);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void keys_init_handler(struct work_struct *work)
|
|
{
|
|
struct key_rpmsg_data msg;
|
|
int i;
|
|
|
|
/* setup keys */
|
|
for (i = 0; i < keys_rpmsg->nbuttons; i++) {
|
|
struct rpmsg_keys_button *button = &keys_rpmsg->buttons[i];
|
|
|
|
msg.header.cate = IMX_RPMSG_KEY;
|
|
msg.header.major = IMX_RMPSG_MAJOR;
|
|
msg.header.minor = IMX_RMPSG_MINOR;
|
|
msg.header.type = KEY_RPMSG_SETUP;
|
|
msg.header.cmd = 0;
|
|
msg.key_index = button->code;
|
|
msg.wakeup = button->wakeup;
|
|
msg.event = button->type;
|
|
if (key_send_message(&msg, keys_rpmsg, true))
|
|
dev_err(&keys_rpmsg->rpdev->dev,
|
|
"key %d setup failed!\n", button->code);
|
|
}
|
|
}
|
|
|
|
static int keys_rpmsg_probe(struct rpmsg_device *rpdev)
|
|
{
|
|
keys_rpmsg->rpdev = rpdev;
|
|
|
|
dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
|
|
rpdev->src, rpdev->dst);
|
|
|
|
init_completion(&keys_rpmsg->cmd_complete);
|
|
|
|
INIT_DELAYED_WORK(&keys_rpmsg->keysetup_work,
|
|
keys_init_handler);
|
|
schedule_delayed_work(&keys_rpmsg->keysetup_work,
|
|
msecs_to_jiffies(100));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct rpmsg_device_id keys_rpmsg_id_table[] = {
|
|
{ .name = "rpmsg-keypad-channel" },
|
|
{ },
|
|
};
|
|
|
|
static struct rpmsg_driver keys_rpmsg_driver = {
|
|
.drv.name = "key_rpmsg",
|
|
.drv.owner = THIS_MODULE,
|
|
.id_table = keys_rpmsg_id_table,
|
|
.probe = keys_rpmsg_probe,
|
|
.callback = keys_rpmsg_cb,
|
|
};
|
|
|
|
static struct rpmsg_keys_drvdata *
|
|
rpmsg_keys_get_devtree_pdata(struct device *dev)
|
|
{
|
|
struct device_node *node, *pp;
|
|
struct rpmsg_keys_drvdata *ddata;
|
|
struct rpmsg_keys_button *button;
|
|
int nbuttons;
|
|
int i;
|
|
|
|
node = dev->of_node;
|
|
if (!node)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
nbuttons = of_get_child_count(node);
|
|
if (nbuttons == 0)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
ddata = devm_kzalloc(dev,
|
|
sizeof(*ddata) + nbuttons *
|
|
sizeof(struct rpmsg_keys_button),
|
|
GFP_KERNEL);
|
|
if (!ddata)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ddata->nbuttons = nbuttons;
|
|
|
|
i = 0;
|
|
for_each_child_of_node(node, pp) {
|
|
button = &ddata->buttons[i++];
|
|
|
|
if (of_property_read_u32(pp, "linux,code", &button->code)) {
|
|
dev_err(dev, "Button without keycode: 0x%x\n",
|
|
button->code);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
button->wakeup = !!of_get_property(pp, "rpmsg-key,wakeup",
|
|
NULL);
|
|
button->type = KEY_BOTH;
|
|
}
|
|
|
|
return ddata;
|
|
}
|
|
|
|
static int rpmsg_keys_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct rpmsg_keys_drvdata *ddata;
|
|
int i, error;
|
|
struct input_dev *input;
|
|
|
|
ddata = rpmsg_keys_get_devtree_pdata(dev);
|
|
if (IS_ERR(ddata))
|
|
return PTR_ERR(ddata);
|
|
|
|
input = devm_input_allocate_device(dev);
|
|
if (!input) {
|
|
dev_err(dev, "failed to allocate input device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ddata->input = input;
|
|
|
|
keys_rpmsg = ddata;
|
|
platform_set_drvdata(pdev, ddata);
|
|
|
|
input->name = pdev->name;
|
|
input->phys = "rpmsg-keys/input0";
|
|
input->dev.parent = &pdev->dev;
|
|
|
|
input->id.bustype = BUS_HOST;
|
|
|
|
for (i = 0; i < ddata->nbuttons; i++) {
|
|
struct rpmsg_keys_button *button = &ddata->buttons[i];
|
|
|
|
input_set_capability(input, EV_KEY, button->code);
|
|
}
|
|
|
|
error = input_register_device(input);
|
|
if (error) {
|
|
dev_err(dev, "Unable to register input device, error: %d\n",
|
|
error);
|
|
goto err_out;
|
|
}
|
|
|
|
return register_rpmsg_driver(&keys_rpmsg_driver);
|
|
err_out:
|
|
return error;
|
|
}
|
|
|
|
static const struct of_device_id rpmsg_keys_of_match[] = {
|
|
{ .compatible = "fsl,rpmsg-keys", },
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, rpmsg_keys_of_match);
|
|
|
|
static struct platform_driver rpmsg_keys_device_driver = {
|
|
.probe = rpmsg_keys_probe,
|
|
.driver = {
|
|
.name = "rpmsg-keys",
|
|
.of_match_table = of_match_ptr(rpmsg_keys_of_match)
|
|
}
|
|
};
|
|
|
|
module_platform_driver(rpmsg_keys_device_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
|
|
MODULE_DESCRIPTION("Keyboard driver based on rpmsg");
|