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_DATA 0x00
38 #define GAYLE_ERROR 0x06 /* see err-bits */
39 #define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */
40 #define GAYLE_SECTOR 0x0e /* starting sector */
41 #define GAYLE_LCYL 0x12 /* starting cylinder */
42 #define GAYLE_HCYL 0x16 /* high byte of starting cyl */
43 #define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
44 #define GAYLE_STATUS 0x1e /* see status-bits */
45 #define GAYLE_CONTROL 0x101a
47 static int gayle_offsets
[IDE_NR_PORTS
] __initdata
= {
48 GAYLE_DATA
, GAYLE_ERROR
, GAYLE_NSECTOR
, GAYLE_SECTOR
, GAYLE_LCYL
,
49 GAYLE_HCYL
, GAYLE_SELECT
, GAYLE_STATUS
, -1, -1
54 * These are at different offsets from the base
57 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
58 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
62 * Offset of the secondary port for IDE doublers
63 * Note that GAYLE_CONTROL is NOT available then!
66 #define GAYLE_NEXT_PORT 0x1000
68 #ifndef CONFIG_BLK_DEV_IDEDOUBLER
69 #define GAYLE_NUM_HWIFS 1
70 #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
71 #define GAYLE_HAS_CONTROL_REG 1
72 #define GAYLE_IDEREG_SIZE 0x2000
73 #else /* CONFIG_BLK_DEV_IDEDOUBLER */
74 #define GAYLE_NUM_HWIFS 2
75 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
77 #define GAYLE_HAS_CONTROL_REG (!ide_doubler)
78 #define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
79 int ide_doubler
= 0; /* support IDE doublers? */
80 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
84 * Check and acknowledge the interrupt status
87 static int gayle_ack_intr_a4000(ide_hwif_t
*hwif
)
91 ch
= z_readb(hwif
->io_ports
[IDE_IRQ_OFFSET
]);
92 if (!(ch
& GAYLE_IRQ_IDE
))
97 static int gayle_ack_intr_a1200(ide_hwif_t
*hwif
)
101 ch
= z_readb(hwif
->io_ports
[IDE_IRQ_OFFSET
]);
102 if (!(ch
& GAYLE_IRQ_IDE
))
104 (void)z_readb(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
105 z_writeb(0x7c, hwif
->io_ports
[IDE_IRQ_OFFSET
]);
110 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
113 static int __init
gayle_init(void)
116 u8 idx
[4] = { 0xff, 0xff, 0xff, 0xff };
121 if ((a4000
= AMIGAHW_PRESENT(A4000_IDE
)) || AMIGAHW_PRESENT(A1200_IDE
))
125 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE
,
132 printk(KERN_INFO
"ide: Gayle IDE controller (A%d style%s)\n",
134 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
135 ide_doubler
? ", IDE doubler" :
139 for (i
= 0; i
< GAYLE_NUM_PROBE_HWIFS
; i
++) {
140 unsigned long base
, ctrlport
, irqport
;
141 ide_ack_intr_t
*ack_intr
;
144 unsigned long phys_base
, res_start
, res_n
;
147 phys_base
= GAYLE_BASE_4000
;
148 irqport
= (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000
);
149 ack_intr
= gayle_ack_intr_a4000
;
151 phys_base
= GAYLE_BASE_1200
;
152 irqport
= (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200
);
153 ack_intr
= gayle_ack_intr_a1200
;
156 * FIXME: we now have selectable modes between mmio v/s iomio
159 phys_base
+= i
*GAYLE_NEXT_PORT
;
161 res_start
= ((unsigned long)phys_base
) & ~(GAYLE_NEXT_PORT
-1);
162 res_n
= GAYLE_IDEREG_SIZE
;
164 if (!request_mem_region(res_start
, res_n
, "IDE"))
167 base
= (unsigned long)ZTWO_VADDR(phys_base
);
168 ctrlport
= GAYLE_HAS_CONTROL_REG
? (base
+ GAYLE_CONTROL
) : 0;
170 ide_setup_ports(&hw
, base
, gayle_offsets
,
171 ctrlport
, irqport
, ack_intr
,
175 hwif
= ide_find_port(base
);
177 u8 index
= hwif
->index
;
179 ide_init_port_data(hwif
, index
);
180 ide_init_port_hw(hwif
, &hw
);
186 release_mem_region(res_start
, res_n
);
189 ide_device_add(idx
, NULL
);
194 module_init(gayle_init
);