drivers/block/falconide.c

   1 /*
   2  *  linux/drivers/block/falconide.c -- Atari Falcon IDE Driver
   3  *
   4  *     Created 12 Jul 1997 by Geert Uytterhoeven
   5  *
   6  *  This file is subject to the terms and conditions of the GNU General Public
   7  *  License.  See the file COPYING in the main directory of this archive for
   8  *  more details.
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/mm.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/blkdev.h>
  15 #include <linux/hdreg.h>
  16 #include <linux/ide.h>
  17
  18 #include <asm/atarihw.h>
  19 #include <asm/atariints.h>
  20 #include <asm/atari_stdma.h>
  21
  22
  23     /*
  24      *  Base of the IDE interface
  25      */
  26
  27 #define ATA_HD_BASE     0xfff00000
  28
  29     /*
  30      *  Offsets from the above base
  31      */
  32
  33 #define ATA_HD_DATA     0x00
  34 #define ATA_HD_ERROR    0x05            /* see err-bits */
  35 #define ATA_HD_NSECTOR  0x09            /* nr of sectors to read/write */
  36 #define ATA_HD_SECTOR   0x0d            /* starting sector */
  37 #define ATA_HD_LCYL     0x11            /* starting cylinder */
  38 #define ATA_HD_HCYL     0x15            /* high byte of starting cyl */
  39 #define ATA_HD_SELECT   0x19            /* 101dhhhh , d=drive, hhhh=head */
  40 #define ATA_HD_STATUS   0x1d            /* see status-bits */
  41 #define ATA_HD_CONTROL  0x39
  42
  43 static int falconide_offsets[IDE_NR_PORTS] = {
  44     ATA_HD_DATA, ATA_HD_ERROR, ATA_HD_NSECTOR, ATA_HD_SECTOR, ATA_HD_LCYL,
  45     ATA_HD_HCYL, ATA_HD_SELECT, ATA_HD_STATUS, ATA_HD_CONTROL, -1
  46 };
  47
  48
  49     /*
  50      *  Probe for a Falcon IDE interface
  51      */
  52
  53 void falconide_init(void)
  54 {
  55     if (MACH_IS_ATARI && ATARIHW_PRESENT(IDE)) {
  56         hw_regs_t hw;
  57         int index;
  58
  59         ide_setup_ports(&hw, (ide_ioreg_t)ATA_HD_BASE, falconide_offsets,
  60                         0, 0, NULL, IRQ_MFP_IDE);
  61         index = ide_register_hw(&hw, NULL);
  62
  63         if (index != -1)
  64             printk("ide%d: Falcon IDE interface\n", index);
  65     }
  66 }