i386/linux-2.3.21/arch/mips/jazz/kbd-jazz.c

   1 /* $Id: kbd-jazz.c,v 1.1 1998/10/28 12:38:10 ralf Exp $
   2  *
   3  * Low-level hardware access stuff for Jazz family machines.
   4  *
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  *
   9  * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle
  10  */
  11 #include <linux/sched.h>
  12 #include <linux/pc_keyb.h>
  13 #include <asm/keyboard.h>
  14 #include <asm/jazz.h>
  15
  16 #define jazz_kh ((keyboard_hardware *) JAZZ_KEYBOARD_ADDRESS)
  17
  18 static void jazz_request_region(void)
  19 {
  20         /* No I/O ports are being used on Jazz.  */
  21 }
  22
  23 static int jazz_request_irq(void (*handler)(int, void *, struct pt_regs *))
  24 {
  25         int res;
  26
  27         res = request_irq(JAZZ_KEYBOARD_IRQ, handler, 0, "keyboard", NULL);
  28         if (res != 0)
  29                 return res;
  30
  31         /* jazz_request_irq() should do this ...  */
  32         r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
  33                           r4030_read_reg16(JAZZ_IO_IRQ_ENABLE)
  34                           | JAZZ_IE_KEYBOARD);
  35
  36         return 0;
  37 }
  38
  39 static int jazz_aux_request_irq(void (*handler)(int, void *, struct pt_regs *))
  40 {
  41         int ret;
  42
  43         ret = request_irq(JAZZ_MOUSE_IRQ, handler, 0, "PS/2 Mouse", NULL);
  44         if (ret != 0)
  45                 return ret;
  46
  47                 r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
  48                                   r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) |
  49                                   JAZZ_IE_MOUSE);
  50         return 0;
  51 }
  52
  53 static void jazz_aux_free_irq(void)
  54 {
  55         r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
  56                           r4030_read_reg16(JAZZ_IO_IRQ_ENABLE)
  57                           | JAZZ_IE_MOUSE);
  58         free_irq(JAZZ_MOUSE_IRQ, NULL);
  59 }
  60
  61 static unsigned char jazz_read_input(void)
  62 {
  63         return jazz_kh->data;
  64 }
  65
  66 static void jazz_write_output(unsigned char val)
  67 {
  68         int status;
  69
  70         do {
  71                 status = jazz_kh->command;
  72         } while (status & KBD_STAT_IBF);
  73         jazz_kh->data = val;
  74 }
  75
  76 static void jazz_write_command(unsigned char val)
  77 {
  78         int status;
  79
  80         do {
  81                 status = jazz_kh->command;
  82         } while (status & KBD_STAT_IBF);
  83         jazz_kh->command = val;
  84 }
  85
  86 static unsigned char jazz_read_status(void)
  87 {
  88         return jazz_kh->command;
  89 }
  90
  91 struct kbd_ops jazz_kbd_ops = {
  92         jazz_request_region,
  93         jazz_request_irq,
  94
  95         jazz_aux_request_irq,
  96         jazz_aux_free_irq,
  97
  98         jazz_read_input,
  99         jazz_write_output,
 100         jazz_write_command,
 101         jazz_read_status
 102 };