2 * linux/drivers/ide/gayle.c -- 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/config.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>
19 #include <linux/zorro.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 */
35 * Offsets from one of the above bases
38 #define GAYLE_DATA 0x00
39 #define GAYLE_ERROR 0x06 /* see err-bits */
40 #define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */
41 #define GAYLE_SECTOR 0x0e /* starting sector */
42 #define GAYLE_LCYL 0x12 /* starting cylinder */
43 #define GAYLE_HCYL 0x16 /* high byte of starting cyl */
44 #define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
45 #define GAYLE_STATUS 0x1e /* see status-bits */
46 #define GAYLE_CONTROL 0x101a
48 static int gayle_offsets[IDE_NR_PORTS] __initdata = {
49 GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,
50 GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1
55 * These are at different offsets from the base
58 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
59 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
63 * Offset of the secondary port for IDE doublers
64 * Note that GAYLE_CONTROL is NOT available then!
67 #define GAYLE_NEXT_PORT 0x1000
69 #ifndef CONFIG_BLK_DEV_IDEDOUBLER
70 #define GAYLE_NUM_HWIFS 1
71 #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
72 #define GAYLE_HAS_CONTROL_REG 1
73 #define GAYLE_IDEREG_SIZE 0x2000
74 #else /* CONFIG_BLK_DEV_IDEDOUBLER */
75 #define GAYLE_NUM_HWIFS 2
76 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
78 #define GAYLE_HAS_CONTROL_REG (!ide_doubler)
79 #define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
80 int ide_doubler = 0; /* support IDE doublers? */
81 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
85 * Check and acknowledge the interrupt status
88 static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
92 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
93 if (!(ch & GAYLE_IRQ_IDE))
98 static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
102 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
103 if (!(ch & GAYLE_IRQ_IDE))
105 (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
106 z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
111 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
114 void __init gayle_init(void)
121 if (!(a4000 = AMIGAHW_PRESENT(A4000_IDE)) && !AMIGAHW_PRESENT(A1200_IDE))
124 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
125 ide_ioreg_t base, ctrlport, irqport;
126 ide_ack_intr_t *ack_intr;
129 unsigned long phys_base, res_start, res_n;
132 phys_base = GAYLE_BASE_4000;
133 irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_4000);
134 ack_intr = gayle_ack_intr_a4000;
136 phys_base = GAYLE_BASE_1200;
137 irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_1200);
138 ack_intr = gayle_ack_intr_a1200;
141 * FIXME: we now have selectable modes between mmio v/s iomio
144 phys_base += i*GAYLE_NEXT_PORT;
146 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
147 res_n = GAYLE_IDEREG_SIZE;
149 if (!request_mem_region(res_start, res_n, "IDE"))
152 base = (ide_ioreg_t)ZTWO_VADDR(phys_base);
153 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
155 ide_setup_ports(&hw, base, gayle_offsets,
156 ctrlport, irqport, ack_intr,
160 index = ide_register_hw(&hw, NULL);
164 printk("ide%d: Gayle IDE interface (A%d style)\n", index,
165 a4000 ? 4000 : 1200);
167 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
169 printk("ide%d: IDE doubler\n", index);
171 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
174 release_mem_region(res_start, res_n);
178 volatile u_short *addr = (u_short *)base;
180 printk("+++ Probing for IDE doubler... ");
183 printk("probe returned 0x%02x (PLEASE REPORT THIS!!)\n", data);