drivers/ide/legacy/falconide.c

   1 /*
   2  *  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/module.h>
  12 #include <linux/types.h>
  13 #include <linux/mm.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/blkdev.h>
  16 #include <linux/hdreg.h>
  17 #include <linux/ide.h>
  18 #include <linux/init.h>
  19
  20 #include <asm/setup.h>
  21 #include <asm/atarihw.h>
  22 #include <asm/atariints.h>
  23 #include <asm/atari_stdma.h>
  24
  25
  26     /*
  27      *  Base of the IDE interface
  28      */
  29
  30 #define ATA_HD_BASE     0xfff00000
  31
  32     /*
  33      *  Offsets from the above base
  34      */
  35
  36 #define ATA_HD_DATA     0x00
  37 #define ATA_HD_ERROR    0x05            /* see err-bits */
  38 #define ATA_HD_NSECTOR  0x09            /* nr of sectors to read/write */
  39 #define ATA_HD_SECTOR   0x0d            /* starting sector */
  40 #define ATA_HD_LCYL     0x11            /* starting cylinder */
  41 #define ATA_HD_HCYL     0x15            /* high byte of starting cyl */
  42 #define ATA_HD_SELECT   0x19            /* 101dhhhh , d=drive, hhhh=head */
  43 #define ATA_HD_STATUS   0x1d            /* see status-bits */
  44 #define ATA_HD_CONTROL  0x39
  45
  46 static int falconide_offsets[IDE_NR_PORTS] __initdata = {
  47     ATA_HD_DATA, ATA_HD_ERROR, ATA_HD_NSECTOR, ATA_HD_SECTOR, ATA_HD_LCYL,
  48     ATA_HD_HCYL, ATA_HD_SELECT, ATA_HD_STATUS, ATA_HD_CONTROL, -1
  49 };
  50
  51
  52     /*
  53      *  falconide_intr_lock is used to obtain access to the IDE interrupt,
  54      *  which is shared between several drivers.
  55      */
  56
  57 int falconide_intr_lock;
  58 EXPORT_SYMBOL(falconide_intr_lock);
  59
  60
  61     /*
  62      *  Probe for a Falcon IDE interface
  63      */
  64
  65 static int __init falconide_init(void)
  66 {
  67     if (MACH_IS_ATARI && ATARIHW_PRESENT(IDE)) {
  68         hw_regs_t hw;
  69         ide_hwif_t *hwif;
  70
  71         printk(KERN_INFO "ide: Falcon IDE controller\n");
  72
  73         ide_setup_ports(&hw, ATA_HD_BASE, falconide_offsets,
  74                         0, 0, NULL,
  75 //                      falconide_iops,
  76                         IRQ_MFP_IDE);
  77
  78         hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
  79         if (hwif) {
  80                 u8 index = hwif->index;
  81                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
  82
  83                 ide_init_port_data(hwif, index);
  84                 ide_init_port_hw(hwif, &hw);
  85
  86                 ide_device_add(idx, NULL);
  87         }
  88     }
  89
  90     return 0;
  91 }
  92
  93 module_init(falconide_init);