drivers/input/serio/ct82c710.c - kernel/bruno - Git at Google

 /*
  *  Copyright (c) 1999-2001 Vojtech Pavlik
  */

 /*
  *  82C710 C&T mouse port chip driver for Linux
  */

 /*
  * 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.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  */

 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/serio.h>
 #include <linux/errno.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>

 #include <asm/io.h>

 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("82C710 C&T mouse port chip driver");
 MODULE_LICENSE("GPL");

 /*
  * ct82c710 interface
  */

 #define CT82C710_DEV_IDLE     0x01		/* Device Idle */
 #define CT82C710_RX_FULL      0x02		/* Device Char received */
 #define CT82C710_TX_IDLE      0x04		/* Device XMIT Idle */
 #define CT82C710_RESET        0x08		/* Device Reset */
 #define CT82C710_INTS_ON      0x10		/* Device Interrupt On */
 #define CT82C710_ERROR_FLAG   0x20		/* Device Error */
 #define CT82C710_CLEAR        0x40		/* Device Clear */
 #define CT82C710_ENABLE       0x80		/* Device Enable */

 #define CT82C710_IRQ          12

 #define CT82C710_DATA         ct82c710_iores.start
 #define CT82C710_STATUS       (ct82c710_iores.start + 1)

 static struct serio *ct82c710_port;
 static struct platform_device *ct82c710_device;
 static struct resource ct82c710_iores;

 /*
  * Interrupt handler for the 82C710 mouse port. A character
  * is waiting in the 82C710.
  */

 static irqreturn_t ct82c710_interrupt(int cpl, void *dev_id)
 {
 	return serio_interrupt(ct82c710_port, inb(CT82C710_DATA), 0);
 }

 /*
  * Wait for device to send output char and flush any input char.
  */

 static int ct82c170_wait(void)
 {
 	int timeout = 60000;

 	while ((inb(CT82C710_STATUS) & (CT82C710_RX_FULL | CT82C710_TX_IDLE | CT82C710_DEV_IDLE))
 		       != (CT82C710_DEV_IDLE | CT82C710_TX_IDLE) && timeout) {

 		if (inb_p(CT82C710_STATUS) & CT82C710_RX_FULL) inb_p(CT82C710_DATA);

 		udelay(1);
 		timeout--;
 	}

 	return !timeout;
 }

 static void ct82c710_close(struct serio *serio)
 {
 	if (ct82c170_wait())
 		printk(KERN_WARNING "ct82c710.c: Device busy in close()\n");

 	outb_p(inb_p(CT82C710_STATUS) & ~(CT82C710_ENABLE | CT82C710_INTS_ON), CT82C710_STATUS);

 	if (ct82c170_wait())
 		printk(KERN_WARNING "ct82c710.c: Device busy in close()\n");

 	free_irq(CT82C710_IRQ, NULL);
 }

 static int ct82c710_open(struct serio *serio)
 {
 	unsigned char status;
 	int err;

 	err = request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL);
 	if (err)
 		return err;

 	status = inb_p(CT82C710_STATUS);

 	status |= (CT82C710_ENABLE | CT82C710_RESET);
 	outb_p(status, CT82C710_STATUS);

 	status &= ~(CT82C710_RESET);
 	outb_p(status, CT82C710_STATUS);

 	status |= CT82C710_INTS_ON;
 	outb_p(status, CT82C710_STATUS);	/* Enable interrupts */

 	while (ct82c170_wait()) {
 		printk(KERN_ERR "ct82c710: Device busy in open()\n");
 		status &= ~(CT82C710_ENABLE | CT82C710_INTS_ON);
 		outb_p(status, CT82C710_STATUS);
 		free_irq(CT82C710_IRQ, NULL);
 		return -EBUSY;
 	}

 	return 0;
 }

 /*
  * Write to the 82C710 mouse device.
  */

 static int ct82c710_write(struct serio *port, unsigned char c)
 {
 	if (ct82c170_wait()) return -1;
 	outb_p(c, CT82C710_DATA);
 	return 0;
 }

 /*
  * See if we can find a 82C710 device. Read mouse address.
  */

 static int __init ct82c710_detect(void)
 {
 	outb_p(0x55, 0x2fa);				/* Any value except 9, ff or 36 */
 	outb_p(0xaa, 0x3fa);				/* Inverse of 55 */
 	outb_p(0x36, 0x3fa);				/* Address the chip */
 	outb_p(0xe4, 0x3fa);				/* 390/4; 390 = config address */
 	outb_p(0x1b, 0x2fa);				/* Inverse of e4 */
 	outb_p(0x0f, 0x390);				/* Write index */
 	if (inb_p(0x391) != 0xe4)			/* Config address found? */
 		return -ENODEV;				/* No: no 82C710 here */

 	outb_p(0x0d, 0x390);				/* Write index */
 	ct82c710_iores.start = inb_p(0x391) << 2;	/* Get mouse I/O address */
 	ct82c710_iores.end = ct82c710_iores.start + 1;
 	ct82c710_iores.flags = IORESOURCE_IO;
 	outb_p(0x0f, 0x390);
 	outb_p(0x0f, 0x391);				/* Close config mode */

 	return 0;
 }

 static int ct82c710_probe(struct platform_device *dev)
 {
 	ct82c710_port = kzalloc(sizeof(struct serio), GFP_KERNEL);
 	if (!ct82c710_port)
 		return -ENOMEM;

 	ct82c710_port->id.type = SERIO_8042;
 	ct82c710_port->dev.parent = &dev->dev;
 	ct82c710_port->open = ct82c710_open;
 	ct82c710_port->close = ct82c710_close;
 	ct82c710_port->write = ct82c710_write;
 	strlcpy(ct82c710_port->name, "C&T 82c710 mouse port",
 		sizeof(ct82c710_port->name));
 	snprintf(ct82c710_port->phys, sizeof(ct82c710_port->phys),
 		 "isa%16llx/serio0", (unsigned long long)CT82C710_DATA);

 	serio_register_port(ct82c710_port);

 	printk(KERN_INFO "serio: C&T 82c710 mouse port at %#llx irq %d\n",
 		(unsigned long long)CT82C710_DATA, CT82C710_IRQ);

 	return 0;
 }

 static int ct82c710_remove(struct platform_device *dev)
 {
 	serio_unregister_port(ct82c710_port);

 	return 0;
 }

 static struct platform_driver ct82c710_driver = {
 	.driver		= {
 		.name	= "ct82c710",
 	},
 	.probe		= ct82c710_probe,
 	.remove		= ct82c710_remove,
 };


 static int __init ct82c710_init(void)
 {
 	int error;

 	error = ct82c710_detect();
 	if (error)
 		return error;

 	error = platform_driver_register(&ct82c710_driver);
 	if (error)
 		return error;

 	ct82c710_device = platform_device_alloc("ct82c710", -1);
 	if (!ct82c710_device) {
 		error = -ENOMEM;
 		goto err_unregister_driver;
 	}

 	error = platform_device_add_resources(ct82c710_device, &ct82c710_iores, 1);
 	if (error)
 		goto err_free_device;

 	error = platform_device_add(ct82c710_device);
 	if (error)
 		goto err_free_device;

 	return 0;

  err_free_device:
 	platform_device_put(ct82c710_device);
  err_unregister_driver:
 	platform_driver_unregister(&ct82c710_driver);
 	return error;
 }

 static void __exit ct82c710_exit(void)
 {
 	platform_device_unregister(ct82c710_device);
 	platform_driver_unregister(&ct82c710_driver);
 }

 module_init(ct82c710_init);
 module_exit(ct82c710_exit);
	/*
	* Copyright (c) 1999-2001 Vojtech Pavlik
	*/

	/*
	* 82C710 C&T mouse port chip driver for Linux
	*/

	/*
	* 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.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	* Should you need to contact me, the author, you can do so either by
	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	*/

	#include <linux/delay.h>
	#include <linux/module.h>
	#include <linux/ioport.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/serio.h>
	#include <linux/errno.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>

	#include <asm/io.h>

	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	MODULE_DESCRIPTION("82C710 C&T mouse port chip driver");
	MODULE_LICENSE("GPL");

	/*
	* ct82c710 interface
	*/

	#define CT82C710_DEV_IDLE 0x01 /* Device Idle */
	#define CT82C710_RX_FULL 0x02 /* Device Char received */
	#define CT82C710_TX_IDLE 0x04 /* Device XMIT Idle */
	#define CT82C710_RESET 0x08 /* Device Reset */
	#define CT82C710_INTS_ON 0x10 /* Device Interrupt On */
	#define CT82C710_ERROR_FLAG 0x20 /* Device Error */
	#define CT82C710_CLEAR 0x40 /* Device Clear */
	#define CT82C710_ENABLE 0x80 /* Device Enable */

	#define CT82C710_IRQ 12

	#define CT82C710_DATA ct82c710_iores.start
	#define CT82C710_STATUS (ct82c710_iores.start + 1)

	static struct serio *ct82c710_port;
	static struct platform_device *ct82c710_device;
	static struct resource ct82c710_iores;

	/*
	* Interrupt handler for the 82C710 mouse port. A character
	* is waiting in the 82C710.
	*/

	static irqreturn_t ct82c710_interrupt(int cpl, void *dev_id)
	{
	return serio_interrupt(ct82c710_port, inb(CT82C710_DATA), 0);
	}

	/*
	* Wait for device to send output char and flush any input char.
	*/

	static int ct82c170_wait(void)
	{
	int timeout = 60000;

	while ((inb(CT82C710_STATUS) & (CT82C710_RX_FULL \| CT82C710_TX_IDLE \| CT82C710_DEV_IDLE))
	!= (CT82C710_DEV_IDLE \| CT82C710_TX_IDLE) && timeout) {

	if (inb_p(CT82C710_STATUS) & CT82C710_RX_FULL) inb_p(CT82C710_DATA);

	udelay(1);
	timeout--;
	}

	return !timeout;
	}

	static void ct82c710_close(struct serio *serio)
	{
	if (ct82c170_wait())
	printk(KERN_WARNING "ct82c710.c: Device busy in close()\n");

	outb_p(inb_p(CT82C710_STATUS) & ~(CT82C710_ENABLE \| CT82C710_INTS_ON), CT82C710_STATUS);

	if (ct82c170_wait())
	printk(KERN_WARNING "ct82c710.c: Device busy in close()\n");

	free_irq(CT82C710_IRQ, NULL);
	}

	static int ct82c710_open(struct serio *serio)
	{
	unsigned char status;
	int err;

	err = request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL);
	if (err)
	return err;

	status = inb_p(CT82C710_STATUS);

	status \|= (CT82C710_ENABLE \| CT82C710_RESET);
	outb_p(status, CT82C710_STATUS);

	status &= ~(CT82C710_RESET);
	outb_p(status, CT82C710_STATUS);

	status \|= CT82C710_INTS_ON;
	outb_p(status, CT82C710_STATUS); /* Enable interrupts */

	while (ct82c170_wait()) {
	printk(KERN_ERR "ct82c710: Device busy in open()\n");
	status &= ~(CT82C710_ENABLE \| CT82C710_INTS_ON);
	outb_p(status, CT82C710_STATUS);
	free_irq(CT82C710_IRQ, NULL);
	return -EBUSY;
	}

	return 0;
	}

	/*
	* Write to the 82C710 mouse device.
	*/

	static int ct82c710_write(struct serio *port, unsigned char c)
	{
	if (ct82c170_wait()) return -1;
	outb_p(c, CT82C710_DATA);
	return 0;
	}

	/*
	* See if we can find a 82C710 device. Read mouse address.
	*/

	static int __init ct82c710_detect(void)
	{
	outb_p(0x55, 0x2fa); /* Any value except 9, ff or 36 */
	outb_p(0xaa, 0x3fa); /* Inverse of 55 */
	outb_p(0x36, 0x3fa); /* Address the chip */
	outb_p(0xe4, 0x3fa); /* 390/4; 390 = config address */
	outb_p(0x1b, 0x2fa); /* Inverse of e4 */
	outb_p(0x0f, 0x390); /* Write index */
	if (inb_p(0x391) != 0xe4) /* Config address found? */
	return -ENODEV; /* No: no 82C710 here */

	outb_p(0x0d, 0x390); /* Write index */
	ct82c710_iores.start = inb_p(0x391) << 2; /* Get mouse I/O address */
	ct82c710_iores.end = ct82c710_iores.start + 1;
	ct82c710_iores.flags = IORESOURCE_IO;
	outb_p(0x0f, 0x390);
	outb_p(0x0f, 0x391); /* Close config mode */

	return 0;
	}

	static int ct82c710_probe(struct platform_device *dev)
	{
	ct82c710_port = kzalloc(sizeof(struct serio), GFP_KERNEL);
	if (!ct82c710_port)
	return -ENOMEM;

	ct82c710_port->id.type = SERIO_8042;
	ct82c710_port->dev.parent = &dev->dev;
	ct82c710_port->open = ct82c710_open;
	ct82c710_port->close = ct82c710_close;
	ct82c710_port->write = ct82c710_write;
	strlcpy(ct82c710_port->name, "C&T 82c710 mouse port",
	sizeof(ct82c710_port->name));
	snprintf(ct82c710_port->phys, sizeof(ct82c710_port->phys),
	"isa%16llx/serio0", (unsigned long long)CT82C710_DATA);

	serio_register_port(ct82c710_port);

	printk(KERN_INFO "serio: C&T 82c710 mouse port at %#llx irq %d\n",
	(unsigned long long)CT82C710_DATA, CT82C710_IRQ);

	return 0;
	}

	static int ct82c710_remove(struct platform_device *dev)
	{
	serio_unregister_port(ct82c710_port);

	return 0;
	}

	static struct platform_driver ct82c710_driver = {
	.driver = {
	.name = "ct82c710",
	},
	.probe = ct82c710_probe,
	.remove = ct82c710_remove,
	};


	static int __init ct82c710_init(void)
	{
	int error;

	error = ct82c710_detect();
	if (error)
	return error;

	error = platform_driver_register(&ct82c710_driver);
	if (error)
	return error;

	ct82c710_device = platform_device_alloc("ct82c710", -1);
	if (!ct82c710_device) {
	error = -ENOMEM;
	goto err_unregister_driver;
	}

	error = platform_device_add_resources(ct82c710_device, &ct82c710_iores, 1);
	if (error)
	goto err_free_device;

	error = platform_device_add(ct82c710_device);
	if (error)
	goto err_free_device;

	return 0;

	err_free_device:
	platform_device_put(ct82c710_device);
	err_unregister_driver:
	platform_driver_unregister(&ct82c710_driver);
	return error;
	}

	static void __exit ct82c710_exit(void)
	{
	platform_device_unregister(ct82c710_device);
	platform_driver_unregister(&ct82c710_driver);
	}

	module_init(ct82c710_init);
	module_exit(ct82c710_exit);