[linux-2.6-block.git] / drivers / input / serio / maceps2.c

/*
 * SGI O2 MACE PS2 controller driver for linux
 *
 * Copyright (C) 2002 Vivien Chappelier
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/serio.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/err.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/ip32/mace.h>
#include <asm/ip32/ip32_ints.h>

MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org");
MODULE_DESCRIPTION("SGI O2 MACE PS2 controller driver");
MODULE_LICENSE("GPL");

#define MACE_PS2_TIMEOUT 10000 /* in 50us unit */

#define PS2_STATUS_CLOCK_SIGNAL  BIT(0) /* external clock signal */
#define PS2_STATUS_CLOCK_INHIBIT BIT(1) /* clken output signal */
#define PS2_STATUS_TX_INPROGRESS BIT(2) /* transmission in progress */
#define PS2_STATUS_TX_EMPTY      BIT(3) /* empty transmit buffer */
#define PS2_STATUS_RX_FULL       BIT(4) /* full receive buffer */
#define PS2_STATUS_RX_INPROGRESS BIT(5) /* reception in progress */
#define PS2_STATUS_ERROR_PARITY  BIT(6) /* parity error */
#define PS2_STATUS_ERROR_FRAMING BIT(7) /* framing error */

#define PS2_CONTROL_TX_CLOCK_DISABLE BIT(0) /* inhibit clock signal after TX */
#define PS2_CONTROL_TX_ENABLE        BIT(1) /* transmit enable */
#define PS2_CONTROL_TX_INT_ENABLE    BIT(2) /* enable transmit interrupt */
#define PS2_CONTROL_RX_INT_ENABLE    BIT(3) /* enable receive interrupt */
#define PS2_CONTROL_RX_CLOCK_ENABLE  BIT(4) /* pause reception if set to 0 */
#define PS2_CONTROL_RESET            BIT(5) /* reset */

struct maceps2_data {
	struct mace_ps2port *port;
	int irq;
};

static struct maceps2_data port_data[2];
static struct serio *maceps2_port[2];
static struct platform_device *maceps2_device;

static int maceps2_write(struct serio *dev, unsigned char val)
{
	struct mace_ps2port *port = ((struct maceps2_data *)dev->port_data)->port;
	unsigned int timeout = MACE_PS2_TIMEOUT;

	do {
		if (port->status & PS2_STATUS_TX_EMPTY) {
			port->tx = val;
			return 0;
		}
		udelay(50);
	} while (timeout--);

	return -1;
}

static irqreturn_t maceps2_interrupt(int irq, void *dev_id)
{
	struct serio *dev = dev_id;
	struct mace_ps2port *port = ((struct maceps2_data *)dev->port_data)->port;
	unsigned long byte;

	if (port->status & PS2_STATUS_RX_FULL) {
		byte = port->rx;
		serio_interrupt(dev, byte & 0xff, 0);
        }

	return IRQ_HANDLED;
}

static int maceps2_open(struct serio *dev)
{
	struct maceps2_data *data = (struct maceps2_data *)dev->port_data;

	if (request_irq(data->irq, maceps2_interrupt, 0, "PS2 port", dev)) {
		printk(KERN_ERR "Could not allocate PS/2 IRQ\n");
		return -EBUSY;
	}

	/* Reset port */
	data->port->control = PS2_CONTROL_TX_CLOCK_DISABLE | PS2_CONTROL_RESET;
	udelay(100);

        /* Enable interrupts */
	data->port->control = PS2_CONTROL_RX_CLOCK_ENABLE |
			      PS2_CONTROL_TX_ENABLE |
			      PS2_CONTROL_RX_INT_ENABLE;

	return 0;
}

static void maceps2_close(struct serio *dev)
{
	struct maceps2_data *data = (struct maceps2_data *)dev->port_data;

	data->port->control = PS2_CONTROL_TX_CLOCK_DISABLE | PS2_CONTROL_RESET;
	udelay(100);
	free_irq(data->irq, dev);
}


static struct serio *maceps2_allocate_port(int idx)
{
	struct serio *serio;

	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
	if (serio) {
		serio->id.type		= SERIO_8042;
		serio->write		= maceps2_write;
		serio->open		= maceps2_open;
		serio->close		= maceps2_close;
		snprintf(serio->name, sizeof(serio->name), "MACE PS/2 port%d", idx);
		snprintf(serio->phys, sizeof(serio->phys), "mace/serio%d", idx);
		serio->port_data	= &port_data[idx];
		serio->dev.parent	= &maceps2_device->dev;
	}

	return serio;
}

static int maceps2_probe(struct platform_device *dev)
{
	maceps2_port[0] = maceps2_allocate_port(0);
	maceps2_port[1] = maceps2_allocate_port(1);
	if (!maceps2_port[0] || !maceps2_port[1]) {
		kfree(maceps2_port[0]);
		kfree(maceps2_port[1]);
		return -ENOMEM;
	}

	serio_register_port(maceps2_port[0]);
	serio_register_port(maceps2_port[1]);

	return 0;
}

static int maceps2_remove(struct platform_device *dev)
{
	serio_unregister_port(maceps2_port[0]);
	serio_unregister_port(maceps2_port[1]);

	return 0;
}

static struct platform_driver maceps2_driver = {
	.driver		= {
		.name	= "maceps2",
	},
	.probe		= maceps2_probe,
	.remove		= maceps2_remove,
};

static int __init maceps2_init(void)
{
	int error;

	error = platform_driver_register(&maceps2_driver);
	if (error)
		return error;

	maceps2_device = platform_device_alloc("maceps2", -1);
	if (!maceps2_device) {
		error = -ENOMEM;
		goto err_unregister_driver;
	}

	port_data[0].port = &mace->perif.ps2.keyb;
	port_data[0].irq  = MACEISA_KEYB_IRQ;
	port_data[1].port = &mace->perif.ps2.mouse;
	port_data[1].irq  = MACEISA_MOUSE_IRQ;

	error = platform_device_add(maceps2_device);
	if (error)
		goto err_free_device;

	return 0;

 err_free_device:
	platform_device_put(maceps2_device);
 err_unregister_driver:
	platform_driver_unregister(&maceps2_driver);
	return error;
}

static void __exit maceps2_exit(void)
{
	platform_device_unregister(maceps2_device);
	platform_driver_unregister(&maceps2_driver);
}

module_init(maceps2_init);
module_exit(maceps2_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* SGI O2 MACE PS2 controller driver for linux
	3	*
	4	* Copyright (C) 2002 Vivien Chappelier
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation
	9	*/
	10	#include <linux/module.h>
	11	#include <linux/init.h>
	12	#include <linux/serio.h>
	13	#include <linux/errno.h>
	14	#include <linux/interrupt.h>
	15	#include <linux/ioport.h>
	16	#include <linux/delay.h>
d052d1be	17	#include <linux/platform_device.h>
1da177e4 LT	18	#include <linux/slab.h>
	19	#include <linux/spinlock.h>
	20	#include <linux/err.h>
	21
	22	#include <asm/io.h>
	23	#include <asm/irq.h>
1da177e4 LT	24	#include <asm/ip32/mace.h>
	25	#include <asm/ip32/ip32_ints.h>
	26
	27	MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org");
	28	MODULE_DESCRIPTION("SGI O2 MACE PS2 controller driver");
	29	MODULE_LICENSE("GPL");
	30
	31	#define MACE_PS2_TIMEOUT 10000 /* in 50us unit */
	32
	33	#define PS2_STATUS_CLOCK_SIGNAL BIT(0) /* external clock signal */
	34	#define PS2_STATUS_CLOCK_INHIBIT BIT(1) /* clken output signal */
	35	#define PS2_STATUS_TX_INPROGRESS BIT(2) /* transmission in progress */
	36	#define PS2_STATUS_TX_EMPTY BIT(3) /* empty transmit buffer */
	37	#define PS2_STATUS_RX_FULL BIT(4) /* full receive buffer */
	38	#define PS2_STATUS_RX_INPROGRESS BIT(5) /* reception in progress */
	39	#define PS2_STATUS_ERROR_PARITY BIT(6) /* parity error */
	40	#define PS2_STATUS_ERROR_FRAMING BIT(7) /* framing error */
	41
	42	#define PS2_CONTROL_TX_CLOCK_DISABLE BIT(0) /* inhibit clock signal after TX */
	43	#define PS2_CONTROL_TX_ENABLE BIT(1) /* transmit enable */
	44	#define PS2_CONTROL_TX_INT_ENABLE BIT(2) /* enable transmit interrupt */
	45	#define PS2_CONTROL_RX_INT_ENABLE BIT(3) /* enable receive interrupt */
	46	#define PS2_CONTROL_RX_CLOCK_ENABLE BIT(4) /* pause reception if set to 0 */
	47	#define PS2_CONTROL_RESET BIT(5) /* reset */
	48
	49	struct maceps2_data {
	50	struct mace_ps2port *port;
	51	int irq;
	52	};
	53
	54	static struct maceps2_data port_data[2];
	55	static struct serio *maceps2_port[2];
	56	static struct platform_device *maceps2_device;
	57
	58	static int maceps2_write(struct serio *dev, unsigned char val)
	59	{
	60	struct mace_ps2port port = ((struct maceps2_data )dev->port_data)->port;
	61	unsigned int timeout = MACE_PS2_TIMEOUT;
	62
	63	do {
	64	if (port->status & PS2_STATUS_TX_EMPTY) {
	65	port->tx = val;
	66	return 0;
	67	}
	68	udelay(50);
	69	} while (timeout--);
	70
	71	return -1;
	72	}
	73
7d12e780	74	static irqreturn_t maceps2_interrupt(int irq, void *dev_id)
1da177e4 LT	75	{
	76	struct serio *dev = dev_id;
	77	struct mace_ps2port port = ((struct maceps2_data )dev->port_data)->port;
	78	unsigned long byte;
	79
	80	if (port->status & PS2_STATUS_RX_FULL) {
	81	byte = port->rx;
7d12e780	82	serio_interrupt(dev, byte & 0xff, 0);
1da177e4 LT	83	}
	84
	85	return IRQ_HANDLED;
	86	}
	87
	88	static int maceps2_open(struct serio *dev)
	89	{
	90	struct maceps2_data data = (struct maceps2_data )dev->port_data;
	91
	92	if (request_irq(data->irq, maceps2_interrupt, 0, "PS2 port", dev)) {
	93	printk(KERN_ERR "Could not allocate PS/2 IRQ\n");
	94	return -EBUSY;
	95	}
	96
	97	/* Reset port */
	98	data->port->control = PS2_CONTROL_TX_CLOCK_DISABLE \| PS2_CONTROL_RESET;
	99	udelay(100);
	100
	101	/* Enable interrupts */
	102	data->port->control = PS2_CONTROL_RX_CLOCK_ENABLE \|
	103	PS2_CONTROL_TX_ENABLE \|
	104	PS2_CONTROL_RX_INT_ENABLE;
	105
	106	return 0;
	107	}
	108
	109	static void maceps2_close(struct serio *dev)
	110	{
	111	struct maceps2_data data = (struct maceps2_data )dev->port_data;
	112
	113	data->port->control = PS2_CONTROL_TX_CLOCK_DISABLE \| PS2_CONTROL_RESET;
	114	udelay(100);
	115	free_irq(data->irq, dev);
	116	}
	117
	118
5298cc4c	119	static struct serio *maceps2_allocate_port(int idx)
1da177e4 LT	120	{
	121	struct serio *serio;
	122
9d6c2502	123	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
1da177e4	124	if (serio) {
1da177e4 LT	125	serio->id.type = SERIO_8042;
	126	serio->write = maceps2_write;
	127	serio->open = maceps2_open;
	128	serio->close = maceps2_close;
	129	snprintf(serio->name, sizeof(serio->name), "MACE PS/2 port%d", idx);
	130	snprintf(serio->phys, sizeof(serio->phys), "mace/serio%d", idx);
	131	serio->port_data = &port_data[idx];
	132	serio->dev.parent = &maceps2_device->dev;
	133	}
	134
	135	return serio;
	136	}
	137
5298cc4c	138	static int maceps2_probe(struct platform_device *dev)
1da177e4	139	{
1da177e4 LT	140	maceps2_port[0] = maceps2_allocate_port(0);
	141	maceps2_port[1] = maceps2_allocate_port(1);
	142	if (!maceps2_port[0] \|\| !maceps2_port[1]) {
	143	kfree(maceps2_port[0]);
	144	kfree(maceps2_port[1]);
1da177e4 LT	145	return -ENOMEM;
	146	}
	147
	148	serio_register_port(maceps2_port[0]);
	149	serio_register_port(maceps2_port[1]);
	150
	151	return 0;
	152	}
	153
e2619cf7	154	static int maceps2_remove(struct platform_device *dev)
1da177e4 LT	155	{
	156	serio_unregister_port(maceps2_port[0]);
	157	serio_unregister_port(maceps2_port[1]);
9d6c2502 DT	158
	159	return 0;
	160	}
	161
	162	static struct platform_driver maceps2_driver = {
	163	.driver = {
	164	.name = "maceps2",
9d6c2502 DT	165	},
9d6c2502 DT	166	.probe = maceps2_probe,
1cb0aa88	167	.remove = maceps2_remove,
9d6c2502 DT	168	};
	169
	170	static int __init maceps2_init(void)
	171	{
	172	int error;
	173
	174	error = platform_driver_register(&maceps2_driver);
	175	if (error)
	176	return error;
	177
	178	maceps2_device = platform_device_alloc("maceps2", -1);
	179	if (!maceps2_device) {
	180	error = -ENOMEM;
	181	goto err_unregister_driver;
	182	}
	183
	184	port_data[0].port = &mace->perif.ps2.keyb;
	185	port_data[0].irq = MACEISA_KEYB_IRQ;
	186	port_data[1].port = &mace->perif.ps2.mouse;
	187	port_data[1].irq = MACEISA_MOUSE_IRQ;
	188
	189	error = platform_device_add(maceps2_device);
	190	if (error)
	191	goto err_free_device;
	192
	193	return 0;
	194
	195	err_free_device:
	196	platform_device_put(maceps2_device);
	197	err_unregister_driver:
	198	platform_driver_unregister(&maceps2_driver);
	199	return error;
	200	}
	201
	202	static void __exit maceps2_exit(void)
	203	{
1da177e4	204	platform_device_unregister(maceps2_device);
9d6c2502	205	platform_driver_unregister(&maceps2_driver);
1da177e4 LT	206	}
	207
	208	module_init(maceps2_init);
	209	module_exit(maceps2_exit);