[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / nvec / nvec_ps2.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;

	ser_dev = devm_kzalloc(&pdev->dev, sizeof(struct serio), GFP_KERNEL);
	if (ser_dev == NULL)
		return -ENOMEM;

	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");
Commit	Line	Data
162c7d8c MD	1	/*
	2	* nvec_ps2: mouse driver for a NVIDIA compliant embedded controller
	3	*
	4	* Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
	5	*
	6	* Authors: Pierre-Hugues Husson <phhusson@free.fr>
	7	* Ilya Petrov <ilya.muromec@gmail.com>
	8	* Marc Dietrich <marvin24@gmx.de>
	9	*
	10	* This file is subject to the terms and conditions of the GNU General Public
	11	* License. See the file "COPYING" in the main directory of this archive
	12	* for more details.
	13	*
	14	*/
	15
7974035c	16	#include <linux/module.h>
32890b98 MD	17	#include <linux/slab.h>
	18	#include <linux/serio.h>
	19	#include <linux/delay.h>
f686e9af	20	#include <linux/platform_device.h>
162c7d8c	21
32890b98 MD	22	#include "nvec.h"
32890b98 MD	23
4b625c3a	24	#define START_STREAMING {'\x06', '\x03', '\x06'}
162c7d8c MD	25	#define STOP_STREAMING {'\x06', '\x04'}
162c7d8c MD	26	#define SEND_COMMAND {'\x06', '\x01', '\xf4', '\x01'}
32890b98	27
0eedab70 MD	28	#ifdef NVEC_PS2_DEBUG
	29	#define NVEC_PHD(str, buf, len) \
	30	print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_NONE, \
	31	16, 1, buf, len, false)
	32	#else
	33	#define NVEC_PHD(str, buf, len)
	34	#endif
	35
162c7d8c MD	36	static const unsigned char MOUSE_RESET[] = {'\x06', '\x01', '\xff', '\x03'};
	37
	38	struct nvec_ps2 {
32890b98 MD	39	struct serio *ser_dev;
	40	struct notifier_block notifier;
	41	struct nvec_chip *nvec;
	42	};
	43
	44	static struct nvec_ps2 ps2_dev;
	45
	46	static int ps2_startstreaming(struct serio *ser_dev)
	47	{
	48	unsigned char buf[] = START_STREAMING;
ff006d12	49	return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
32890b98 MD	50	}
	51
	52	static void ps2_stopstreaming(struct serio *ser_dev)
	53	{
	54	unsigned char buf[] = STOP_STREAMING;
	55	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
	56	}
	57
32890b98 MD	58	static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
	59	{
	60	unsigned char buf[] = SEND_COMMAND;
	61
	62	buf[2] = cmd & 0xff;
	63
	64	dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
ff006d12	65	return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
32890b98 MD	66	}
	67
	68	static int nvec_ps2_notifier(struct notifier_block *nb,
162c7d8c	69	unsigned long event_type, void *data)
32890b98 MD	70	{
	71	int i;
	72	unsigned char msg = (unsigned char )data;
	73
	74	switch (event_type) {
162c7d8c	75	case NVEC_PS2_EVT:
1e46e627 JAK	76	for (i = 0; i < msg[1]; i++)
1e46e627 JAK	77	serio_interrupt(ps2_dev.ser_dev, msg[2 + i], 0);
0eedab70	78	NVEC_PHD("ps/2 mouse event: ", &msg[2], msg[1]);
162c7d8c MD	79	return NOTIFY_STOP;
	80
	81	case NVEC_PS2:
0eedab70	82	if (msg[2] == 1) {
162c7d8c MD	83	for (i = 0; i < (msg[1] - 2); i++)
162c7d8c MD	84	serio_interrupt(ps2_dev.ser_dev, msg[i + 4], 0);
0eedab70	85	NVEC_PHD("ps/2 mouse reply: ", &msg[4], msg[1] - 2);
162c7d8c MD	86	}
162c7d8c MD	87
0eedab70 MD	88	else if (msg[1] != 2) /* !ack */
0eedab70 MD	89	NVEC_PHD("unhandled mouse event: ", msg, msg[1] + 2);
162c7d8c	90	return NOTIFY_STOP;
32890b98 MD	91	}
	92
	93	return NOTIFY_DONE;
	94	}
	95
f686e9af	96	static int __devinit nvec_mouse_probe(struct platform_device *pdev)
32890b98	97	{
f686e9af	98	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
f5e3352e MD	99	struct serio *ser_dev;
	100
	101	ser_dev = devm_kzalloc(&pdev->dev, sizeof(struct serio), GFP_KERNEL);
	102	if (ser_dev == NULL)
	103	return -ENOMEM;
32890b98	104
36b30d61	105	ser_dev->id.type = SERIO_PS_PSTHRU;
162c7d8c	106	ser_dev->write = ps2_sendcommand;
34ba143b MD	107	ser_dev->start = ps2_startstreaming;
34ba143b MD	108	ser_dev->stop = ps2_stopstreaming;
32890b98	109
162c7d8c MD	110	strlcpy(ser_dev->name, "nvec mouse", sizeof(ser_dev->name));
162c7d8c MD	111	strlcpy(ser_dev->phys, "nvec", sizeof(ser_dev->phys));
32890b98 MD	112
	113	ps2_dev.ser_dev = ser_dev;
	114	ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
	115	ps2_dev.nvec = nvec;
	116	nvec_register_notifier(nvec, &ps2_dev.notifier, 0);
	117
	118	serio_register_port(ser_dev);
	119
	120	/* mouse reset */
162c7d8c	121	nvec_write_async(nvec, MOUSE_RESET, 4);
32890b98 MD	122
	123	return 0;
	124	}
f686e9af	125
d1b5342c MD	126	static int nvec_mouse_suspend(struct platform_device *pdev, pm_message_t state)
	127	{
	128	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
	129
a573298b MD	130	/* disable mouse */
	131	nvec_write_async(nvec, "\x06\xf4", 2);
	132
d1b5342c MD	133	/* send cancel autoreceive */
	134	nvec_write_async(nvec, "\x06\x04", 2);
	135
	136	return 0;
	137	}
	138
	139	static int nvec_mouse_resume(struct platform_device *pdev)
	140	{
a573298b MD	141	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
a573298b MD	142
d1b5342c MD	143	ps2_startstreaming(ps2_dev.ser_dev);
d1b5342c MD	144
a573298b MD	145	/* enable mouse */
	146	nvec_write_async(nvec, "\x06\xf5", 2);
	147
d1b5342c MD	148	return 0;
	149	}
	150
f686e9af	151	static struct platform_driver nvec_mouse_driver = {
162c7d8c	152	.probe = nvec_mouse_probe,
d1b5342c MD	153	.suspend = nvec_mouse_suspend,
d1b5342c MD	154	.resume = nvec_mouse_resume,
162c7d8c MD	155	.driver = {
	156	.name = "nvec-mouse",
	157	.owner = THIS_MODULE,
f686e9af MD	158	},
	159	};
	160
	161	static int __init nvec_mouse_init(void)
	162	{
	163	return platform_driver_register(&nvec_mouse_driver);
	164	}
	165
	166	module_init(nvec_mouse_init);
162c7d8c MD	167
	168	MODULE_DESCRIPTION("NVEC mouse driver");
	169	MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
	170	MODULE_LICENSE("GPL");