2 * Atari Falcon IDE Driver
4 * Created 12 Jul 1997 by Geert Uytterhoeven
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
11 #include <linux/module.h>
12 #include <linux/types.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>
20 #include <asm/setup.h>
21 #include <asm/atarihw.h>
22 #include <asm/atariints.h>
23 #include <asm/atari_stdma.h>
25 #define DRV_NAME "falconide"
28 * Base of the IDE interface
31 #define ATA_HD_BASE 0xfff00000
34 * Offsets from the above base
37 #define ATA_HD_CONTROL 0x39
40 * falconide_intr_lock is used to obtain access to the IDE interrupt,
41 * which is shared between several drivers.
44 int falconide_intr_lock;
45 EXPORT_SYMBOL(falconide_intr_lock);
47 static void falconide_input_data(ide_drive_t *drive, struct request *rq,
48 void *buf, unsigned int len)
50 unsigned long data_addr = drive->hwif->io_ports.data_addr;
52 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
53 return insw(data_addr, buf, (len + 1) / 2);
55 insw_swapw(data_addr, buf, (len + 1) / 2);
58 static void falconide_output_data(ide_drive_t *drive, struct request *rq,
59 void *buf, unsigned int len)
61 unsigned long data_addr = drive->hwif->io_ports.data_addr;
63 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
64 return outsw(data_addr, buf, (len + 1) / 2);
66 outsw_swapw(data_addr, buf, (len + 1) / 2);
69 static void __init falconide_setup_ports(hw_regs_t *hw)
73 memset(hw, 0, sizeof(*hw));
75 hw->io_ports.data_addr = ATA_HD_BASE;
77 for (i = 1; i < 8; i++)
78 hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
80 hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
82 hw->irq = IRQ_MFP_IDE;
87 * Probe for a Falcon IDE interface
90 static int __init falconide_init(void)
95 if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
98 printk(KERN_INFO "ide: Falcon IDE controller\n");
100 if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
101 printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
105 falconide_setup_ports(&hw);
107 hwif = ide_find_port();
109 u8 index = hwif->index;
110 u8 idx[4] = { index, 0xff, 0xff, 0xff };
112 ide_init_port_data(hwif, index);
113 ide_init_port_hw(hwif, &hw);
115 /* Atari has a byte-swapped IDE interface */
116 hwif->input_data = falconide_input_data;
117 hwif->output_data = falconide_output_data;
119 ide_get_lock(NULL, NULL);
120 ide_device_add(idx, NULL);
127 module_init(falconide_init);
129 MODULE_LICENSE("GPL");