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>
19 #include <linux/module.h>
21 #include <asm/setup.h>
22 #include <asm/amigahw.h>
23 #include <asm/amigaints.h>
24 #include <asm/amigayle.h>
28 * Bases of the IDE interfaces
31 #define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
32 #define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
34 #define GAYLE_IDEREG_SIZE 0x2000
37 * Offsets from one of the above bases
40 #define GAYLE_CONTROL 0x101a
43 * These are at different offsets from the base
46 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
47 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
51 * Offset of the secondary port for IDE doublers
52 * Note that GAYLE_CONTROL is NOT available then!
55 #define GAYLE_NEXT_PORT 0x1000
57 #ifndef CONFIG_BLK_DEV_IDEDOUBLER
58 #define GAYLE_NUM_HWIFS 1
59 #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
60 #define GAYLE_HAS_CONTROL_REG 1
61 #else /* CONFIG_BLK_DEV_IDEDOUBLER */
62 #define GAYLE_NUM_HWIFS 2
63 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
65 #define GAYLE_HAS_CONTROL_REG (!ide_doubler)
67 static int ide_doubler
;
68 module_param_named(doubler
, ide_doubler
, bool, 0);
69 MODULE_PARM_DESC(doubler
, "enable support for IDE doublers");
70 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
74 * Check and acknowledge the interrupt status
77 static int gayle_ack_intr_a4000(ide_hwif_t
*hwif
)
81 ch
= z_readb(hwif
->io_ports
.irq_addr
);
82 if (!(ch
& GAYLE_IRQ_IDE
))
87 static int gayle_ack_intr_a1200(ide_hwif_t
*hwif
)
91 ch
= z_readb(hwif
->io_ports
.irq_addr
);
92 if (!(ch
& GAYLE_IRQ_IDE
))
94 (void)z_readb(hwif
->io_ports
.status_addr
);
95 z_writeb(0x7c, hwif
->io_ports
.irq_addr
);
99 static void __init
gayle_setup_ports(hw_regs_t
*hw
, unsigned long base
,
100 unsigned long ctl
, unsigned long irq_port
,
101 ide_ack_intr_t
*ack_intr
)
105 memset(hw
, 0, sizeof(*hw
));
107 hw
->io_ports
.data_addr
= base
;
109 for (i
= 1; i
< 8; i
++)
110 hw
->io_ports_array
[i
] = base
+ 2 + i
* 4;
112 hw
->io_ports
.ctl_addr
= ctl
;
113 hw
->io_ports
.irq_addr
= irq_port
;
115 hw
->irq
= IRQ_AMIGA_PORTS
;
116 hw
->ack_intr
= ack_intr
;
118 hw
->chipset
= ide_generic
;
122 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
125 static int __init
gayle_init(void)
127 unsigned long phys_base
, res_start
, res_n
;
128 unsigned long base
, ctrlport
, irqport
;
129 ide_ack_intr_t
*ack_intr
;
131 hw_regs_t hw
[GAYLE_NUM_HWIFS
], *hws
[] = { NULL
, NULL
, NULL
, NULL
};
136 if ((a4000
= AMIGAHW_PRESENT(A4000_IDE
)) || AMIGAHW_PRESENT(A1200_IDE
))
140 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE
,
147 printk(KERN_INFO
"ide: Gayle IDE controller (A%d style%s)\n",
149 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
150 ide_doubler
? ", IDE doubler" :
155 phys_base
= GAYLE_BASE_4000
;
156 irqport
= (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000
);
157 ack_intr
= gayle_ack_intr_a4000
;
159 phys_base
= GAYLE_BASE_1200
;
160 irqport
= (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200
);
161 ack_intr
= gayle_ack_intr_a1200
;
164 * FIXME: we now have selectable modes between mmio v/s iomio
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 for (i
= 0; i
< GAYLE_NUM_PROBE_HWIFS
; i
++) {
174 base
= (unsigned long)ZTWO_VADDR(phys_base
+ i
* GAYLE_NEXT_PORT
);
175 ctrlport
= GAYLE_HAS_CONTROL_REG
? (base
+ GAYLE_CONTROL
) : 0;
177 gayle_setup_ports(&hw
[i
], base
, ctrlport
, irqport
, ack_intr
);
182 rc
= ide_host_add(NULL
, hws
, NULL
);
184 release_mem_region(res_start
, res_n
);
189 module_init(gayle_init
);
191 MODULE_LICENSE("GPL");