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_CONTROL  0x39
  37
  38     /*
  39      *  falconide_intr_lock is used to obtain access to the IDE interrupt,
  40      *  which is shared between several drivers.
  41      */
  42
  43 int falconide_intr_lock;
  44 EXPORT_SYMBOL(falconide_intr_lock);
  45
  46 static void __init falconide_setup_ports(hw_regs_t *hw)
  47 {
  48         int i;
  49
  50         memset(hw, 0, sizeof(*hw));
  51
  52         hw->io_ports[IDE_DATA_OFFSET] = ATA_HD_BASE;
  53
  54         for (i = 1; i < 8; i++)
  55                 hw->io_ports[i] = ATA_HD_BASE + 1 + i * 4;
  56
  57         hw->io_ports[IDE_CONTROL_OFFSET] = ATA_HD_BASE + ATA_HD_CONTROL;
  58
  59         hw->irq = IRQ_MFP_IDE;
  60         hw->ack_intr = NULL;
  61 }
  62
  63     /*
  64      *  Probe for a Falcon IDE interface
  65      */
  66
  67 static int __init falconide_init(void)
  68 {
  69         hw_regs_t hw;
  70         ide_hwif_t *hwif;
  71
  72         if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
  73                 return 0;
  74
  75         printk(KERN_INFO "ide: Falcon IDE controller\n");
  76
  77         falconide_setup_ports(&hw);
  78
  79         hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
  80         if (hwif) {
  81                 u8 index = hwif->index;
  82                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
  83
  84                 ide_init_port_data(hwif, index);
  85                 ide_init_port_hw(hwif, &hw);
  86
  87                 ide_get_lock(NULL, NULL);
  88                 ide_device_add(idx, NULL);
  89                 ide_release_lock();
  90         }
  91
  92         return 0;
  93 }
  94
  95 module_init(falconide_init);
  96
  97 MODULE_LICENSE("GPL");