2 * Amiga Gayle IDE Driver
4 * Created 9 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/types.h>
13 #include <linux/interrupt.h>
14 #include <linux/blkdev.h>
15 #include <linux/hdreg.h>
16 #include <linux/ide.h>
17 #include <linux/init.h>
18 #include <linux/zorro.h>
20 #include <asm/setup.h>
21 #include <asm/amigahw.h>
22 #include <asm/amigaints.h>
23 #include <asm/amigayle.h>
27 * Bases of the IDE interfaces
30 #define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
31 #define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
34 * Offsets from one of the above bases
37 #define GAYLE_CONTROL 0x101a
40 * These are at different offsets from the base
43 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
44 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
48 * Offset of the secondary port for IDE doublers
49 * Note that GAYLE_CONTROL is NOT available then!
52 #define GAYLE_NEXT_PORT 0x1000
54 #ifndef CONFIG_BLK_DEV_IDEDOUBLER
55 #define GAYLE_NUM_HWIFS 1
56 #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
57 #define GAYLE_HAS_CONTROL_REG 1
58 #define GAYLE_IDEREG_SIZE 0x2000
59 #else /* CONFIG_BLK_DEV_IDEDOUBLER */
60 #define GAYLE_NUM_HWIFS 2
61 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
63 #define GAYLE_HAS_CONTROL_REG (!ide_doubler)
64 #define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
65 int ide_doubler
= 0; /* support IDE doublers? */
66 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
70 * Check and acknowledge the interrupt status
73 static int gayle_ack_intr_a4000(ide_hwif_t
*hwif
)
77 ch
= z_readb(hwif
->io_ports
[IDE_IRQ_OFFSET
]);
78 if (!(ch
& GAYLE_IRQ_IDE
))
83 static int gayle_ack_intr_a1200(ide_hwif_t
*hwif
)
87 ch
= z_readb(hwif
->io_ports
[IDE_IRQ_OFFSET
]);
88 if (!(ch
& GAYLE_IRQ_IDE
))
90 (void)z_readb(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
91 z_writeb(0x7c, hwif
->io_ports
[IDE_IRQ_OFFSET
]);
95 static void __init
gayle_setup_ports(hw_regs_t
*hw
, unsigned long base
,
96 unsigned long ctl
, unsigned long irq_port
,
97 ide_ack_intr_t
*ack_intr
)
101 memset(hw
, 0, sizeof(*hw
));
103 hw
->io_ports
[IDE_DATA_OFFSET
] = base
;
105 for (i
= 1; i
< 8; i
++)
106 hw
->io_ports
[i
] = base
+ 2 + i
* 4;
108 hw
->io_ports
[IDE_CONTROL_OFFSET
] = ctl
;
109 hw
->io_ports
[IDE_IRQ_OFFSET
] = irq_port
;
111 hw
->irq
= IRQ_AMIGA_PORTS
;
112 hw
->ack_intr
= ack_intr
;
116 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
119 static int __init
gayle_init(void)
122 u8 idx
[4] = { 0xff, 0xff, 0xff, 0xff };
127 if ((a4000
= AMIGAHW_PRESENT(A4000_IDE
)) || AMIGAHW_PRESENT(A1200_IDE
))
131 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE
,
138 printk(KERN_INFO
"ide: Gayle IDE controller (A%d style%s)\n",
140 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
141 ide_doubler
? ", IDE doubler" :
145 for (i
= 0; i
< GAYLE_NUM_PROBE_HWIFS
; i
++) {
146 unsigned long base
, ctrlport
, irqport
;
147 ide_ack_intr_t
*ack_intr
;
150 unsigned long phys_base
, res_start
, res_n
;
153 phys_base
= GAYLE_BASE_4000
;
154 irqport
= (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000
);
155 ack_intr
= gayle_ack_intr_a4000
;
157 phys_base
= GAYLE_BASE_1200
;
158 irqport
= (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200
);
159 ack_intr
= gayle_ack_intr_a1200
;
162 * FIXME: we now have selectable modes between mmio v/s iomio
165 phys_base
+= i
*GAYLE_NEXT_PORT
;
167 res_start
= ((unsigned long)phys_base
) & ~(GAYLE_NEXT_PORT
-1);
168 res_n
= GAYLE_IDEREG_SIZE
;
170 if (!request_mem_region(res_start
, res_n
, "IDE"))
173 base
= (unsigned long)ZTWO_VADDR(phys_base
);
174 ctrlport
= GAYLE_HAS_CONTROL_REG
? (base
+ GAYLE_CONTROL
) : 0;
176 gayle_setup_ports(&hw
, base
, ctrlport
, irqport
, ack_intr
);
178 hwif
= ide_find_port(base
);
180 u8 index
= hwif
->index
;
182 ide_init_port_data(hwif
, index
);
183 ide_init_port_hw(hwif
, &hw
);
189 release_mem_region(res_start
, res_n
);
192 ide_device_add(idx
, NULL
);
197 module_init(gayle_init
);
199 MODULE_LICENSE("GPL");