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 #define DRV_NAME "falconide"
  26
  27     /*
  28      *  Base of the IDE interface
  29      */
  30
  31 #define ATA_HD_BASE     0xfff00000
  32
  33     /*
  34      *  Offsets from the above base
  35      */
  36
  37 #define ATA_HD_CONTROL  0x39
  38
  39     /*
  40      *  falconide_intr_lock is used to obtain access to the IDE interrupt,
  41      *  which is shared between several drivers.
  42      */
  43
  44 int falconide_intr_lock;
  45 EXPORT_SYMBOL(falconide_intr_lock);
  46
  47 static void falconide_atapi_input_bytes(ide_drive_t *drive, void *buf,
  48                                         unsigned int len)
  49 {
  50         insw_swapw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
  51 }
  52
  53 static void falconide_atapi_output_bytes(ide_drive_t *drive, void *buf,
  54                                          unsigned int len)
  55 {
  56         outsw_swapw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
  57 }
  58
  59 static void falconide_ata_input_data(ide_drive_t *drive, struct request *rq,
  60                                      void *buf, unsigned int wcount)
  61 {
  62         if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
  63                 return insw(drive->hwif->io_ports.data_addr, buf, wcount * 2);
  64
  65         falconide_atapi_input_bytes(drive, buf, wcount * 4);
  66 }
  67
  68 static void falconide_ata_output_data(ide_drive_t *drive, struct request *rq,
  69                                       void *buf, unsigned int wcount)
  70 {
  71         if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
  72                 return outsw(drive->hwif->io_ports.data_addr, buf, wcount * 2);
  73
  74         falconide_atapi_output_bytes(drive, buf, wcount * 4);
  75 }
  76
  77 static void __init falconide_setup_ports(hw_regs_t *hw)
  78 {
  79         int i;
  80
  81         memset(hw, 0, sizeof(*hw));
  82
  83         hw->io_ports.data_addr = ATA_HD_BASE;
  84
  85         for (i = 1; i < 8; i++)
  86                 hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
  87
  88         hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
  89
  90         hw->irq = IRQ_MFP_IDE;
  91         hw->ack_intr = NULL;
  92 }
  93
  94     /*
  95      *  Probe for a Falcon IDE interface
  96      */
  97
  98 static int __init falconide_init(void)
  99 {
 100         hw_regs_t hw;
 101         ide_hwif_t *hwif;
 102
 103         if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
 104                 return 0;
 105
 106         printk(KERN_INFO "ide: Falcon IDE controller\n");
 107
 108         if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
 109                 printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
 110                 return -EBUSY;
 111         }
 112
 113         falconide_setup_ports(&hw);
 114
 115         hwif = ide_find_port();
 116         if (hwif) {
 117                 u8 index = hwif->index;
 118                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
 119
 120                 ide_init_port_data(hwif, index);
 121                 ide_init_port_hw(hwif, &hw);
 122
 123                 /* Atari has a byte-swapped IDE interface */
 124                 hwif->atapi_input_bytes  = falconide_atapi_input_bytes;
 125                 hwif->atapi_output_bytes = falconide_atapi_output_bytes;
 126                 hwif->ata_input_data     = falconide_ata_input_data;
 127                 hwif->ata_output_data    = falconide_ata_output_data;
 128
 129                 ide_get_lock(NULL, NULL);
 130                 ide_device_add(idx, NULL);
 131                 ide_release_lock();
 132         }
 133
 134         return 0;
 135 }
 136
 137 module_init(falconide_init);
 138
 139 MODULE_LICENSE("GPL");