167 lines
4.0 KiB
C
167 lines
4.0 KiB
C
/*
|
|
* nvec_ps2: mouse driver for a NVIDIA compliant embedded controller
|
|
*
|
|
* Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
|
|
*
|
|
* Authors: Pierre-Hugues Husson <phhusson@free.fr>
|
|
* Ilya Petrov <ilya.muromec@gmail.com>
|
|
* Marc Dietrich <marvin24@gmx.de>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/serio.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "nvec.h"
|
|
|
|
#define START_STREAMING {'\x06', '\x03', '\x06'}
|
|
#define STOP_STREAMING {'\x06', '\x04'}
|
|
#define SEND_COMMAND {'\x06', '\x01', '\xf4', '\x01'}
|
|
|
|
#ifdef NVEC_PS2_DEBUG
|
|
#define NVEC_PHD(str, buf, len) \
|
|
print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_NONE, \
|
|
16, 1, buf, len, false)
|
|
#else
|
|
#define NVEC_PHD(str, buf, len)
|
|
#endif
|
|
|
|
static const unsigned char MOUSE_RESET[] = {'\x06', '\x01', '\xff', '\x03'};
|
|
|
|
struct nvec_ps2 {
|
|
struct serio *ser_dev;
|
|
struct notifier_block notifier;
|
|
struct nvec_chip *nvec;
|
|
};
|
|
|
|
static struct nvec_ps2 ps2_dev;
|
|
|
|
static int ps2_startstreaming(struct serio *ser_dev)
|
|
{
|
|
unsigned char buf[] = START_STREAMING;
|
|
return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
|
|
}
|
|
|
|
static void ps2_stopstreaming(struct serio *ser_dev)
|
|
{
|
|
unsigned char buf[] = STOP_STREAMING;
|
|
nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
|
|
}
|
|
|
|
static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
|
|
{
|
|
unsigned char buf[] = SEND_COMMAND;
|
|
|
|
buf[2] = cmd & 0xff;
|
|
|
|
dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
|
|
return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
|
|
}
|
|
|
|
static int nvec_ps2_notifier(struct notifier_block *nb,
|
|
unsigned long event_type, void *data)
|
|
{
|
|
int i;
|
|
unsigned char *msg = (unsigned char *)data;
|
|
|
|
switch (event_type) {
|
|
case NVEC_PS2_EVT:
|
|
for (i = 0; i < msg[1]; i++)
|
|
serio_interrupt(ps2_dev.ser_dev, msg[2 + i], 0);
|
|
NVEC_PHD("ps/2 mouse event: ", &msg[2], msg[1]);
|
|
return NOTIFY_STOP;
|
|
|
|
case NVEC_PS2:
|
|
if (msg[2] == 1) {
|
|
for (i = 0; i < (msg[1] - 2); i++)
|
|
serio_interrupt(ps2_dev.ser_dev, msg[i + 4], 0);
|
|
NVEC_PHD("ps/2 mouse reply: ", &msg[4], msg[1] - 2);
|
|
}
|
|
|
|
else if (msg[1] != 2) /* !ack */
|
|
NVEC_PHD("unhandled mouse event: ", msg, msg[1] + 2);
|
|
return NOTIFY_STOP;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int __devinit nvec_mouse_probe(struct platform_device *pdev)
|
|
{
|
|
struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
|
|
struct serio *ser_dev = kzalloc(sizeof(struct serio), GFP_KERNEL);
|
|
|
|
ser_dev->id.type = SERIO_PS_PSTHRU;
|
|
ser_dev->write = ps2_sendcommand;
|
|
ser_dev->start = ps2_startstreaming;
|
|
ser_dev->stop = ps2_stopstreaming;
|
|
|
|
strlcpy(ser_dev->name, "nvec mouse", sizeof(ser_dev->name));
|
|
strlcpy(ser_dev->phys, "nvec", sizeof(ser_dev->phys));
|
|
|
|
ps2_dev.ser_dev = ser_dev;
|
|
ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
|
|
ps2_dev.nvec = nvec;
|
|
nvec_register_notifier(nvec, &ps2_dev.notifier, 0);
|
|
|
|
serio_register_port(ser_dev);
|
|
|
|
/* mouse reset */
|
|
nvec_write_async(nvec, MOUSE_RESET, 4);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvec_mouse_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
/* disable mouse */
|
|
nvec_write_async(nvec, "\x06\xf4", 2);
|
|
|
|
/* send cancel autoreceive */
|
|
nvec_write_async(nvec, "\x06\x04", 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvec_mouse_resume(struct platform_device *pdev)
|
|
{
|
|
struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
ps2_startstreaming(ps2_dev.ser_dev);
|
|
|
|
/* enable mouse */
|
|
nvec_write_async(nvec, "\x06\xf5", 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver nvec_mouse_driver = {
|
|
.probe = nvec_mouse_probe,
|
|
.suspend = nvec_mouse_suspend,
|
|
.resume = nvec_mouse_resume,
|
|
.driver = {
|
|
.name = "nvec-mouse",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init nvec_mouse_init(void)
|
|
{
|
|
return platform_driver_register(&nvec_mouse_driver);
|
|
}
|
|
|
|
module_init(nvec_mouse_init);
|
|
|
|
MODULE_DESCRIPTION("NVEC mouse driver");
|
|
MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
|
|
MODULE_LICENSE("GPL");
|