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/* $Id: kbd-jazz.c,v 1.1 1998/10/28 12:38:10 ralf Exp $
*
* Low-level hardware access stuff for Jazz family machines.
*
* 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.
*
* Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle
*/
#include <linux/sched.h>
#include <linux/pc_keyb.h>
#include <asm/keyboard.h>
#include <asm/jazz.h>
#define jazz_kh ((keyboard_hardware *) JAZZ_KEYBOARD_ADDRESS)
static void jazz_request_region(void)
{
/* No I/O ports are being used on Jazz. */
}
static int jazz_request_irq(void (*handler)(int, void *, struct pt_regs *))
{
int res;
res = request_irq(JAZZ_KEYBOARD_IRQ, handler, 0, "keyboard", NULL);
if (res != 0)
return res;
/* jazz_request_irq() should do this ... */
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE)
| JAZZ_IE_KEYBOARD);
return 0;
}
static int jazz_aux_request_irq(void (*handler)(int, void *, struct pt_regs *))
{
int ret;
ret = request_irq(JAZZ_MOUSE_IRQ, handler, 0, "PS/2 Mouse", NULL);
if (ret != 0)
return ret;
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) |
JAZZ_IE_MOUSE);
return 0;
}
static void jazz_aux_free_irq(void)
{
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE)
| JAZZ_IE_MOUSE);
free_irq(JAZZ_MOUSE_IRQ, NULL);
}
static unsigned char jazz_read_input(void)
{
return jazz_kh->data;
}
static void jazz_write_output(unsigned char val)
{
int status;
do {
status = jazz_kh->command;
} while (status & KBD_STAT_IBF);
jazz_kh->data = val;
}
static void jazz_write_command(unsigned char val)
{
int status;
do {
status = jazz_kh->command;
} while (status & KBD_STAT_IBF);
jazz_kh->command = val;
}
static unsigned char jazz_read_status(void)
{
return jazz_kh->command;
}
struct kbd_ops jazz_kbd_ops = {
jazz_request_region,
jazz_request_irq,
jazz_aux_request_irq,
jazz_aux_free_irq,
jazz_read_input,
jazz_write_output,
jazz_write_command,
jazz_read_status
};
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