pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / ide / legacy / gayle.c
blob0830a021bbb609d4b103dc037239a0f2ec5bc934
1 /*
2 * linux/drivers/ide/legacy/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
8 * more details.
9 */
11 #include <linux/types.h>
12 #include <linux/mm.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 : \
76 GAYLE_NUM_HWIFS-1)
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)
89 unsigned char ch;
91 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
92 if (!(ch & GAYLE_IRQ_IDE))
93 return 0;
94 return 1;
97 static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
99 unsigned char ch;
101 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
102 if (!(ch & GAYLE_IRQ_IDE))
103 return 0;
104 (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
105 z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
106 return 1;
110 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
113 void __init gayle_init(void)
115 int a4000, i;
117 if (!MACH_IS_AMIGA)
118 return;
120 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
121 goto found;
123 #ifdef CONFIG_ZORRO
124 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
125 NULL))
126 goto found;
127 #endif
128 return;
130 found:
131 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
132 unsigned long base, ctrlport, irqport;
133 ide_ack_intr_t *ack_intr;
134 hw_regs_t hw;
135 ide_hwif_t *hwif;
136 int index;
137 unsigned long phys_base, res_start, res_n;
139 if (a4000) {
140 phys_base = GAYLE_BASE_4000;
141 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
142 ack_intr = gayle_ack_intr_a4000;
143 } else {
144 phys_base = GAYLE_BASE_1200;
145 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
146 ack_intr = gayle_ack_intr_a1200;
149 * FIXME: we now have selectable modes between mmio v/s iomio
152 phys_base += i*GAYLE_NEXT_PORT;
154 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
155 res_n = GAYLE_IDEREG_SIZE;
157 if (!request_mem_region(res_start, res_n, "IDE"))
158 continue;
160 base = (unsigned long)ZTWO_VADDR(phys_base);
161 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
163 ide_setup_ports(&hw, base, gayle_offsets,
164 ctrlport, irqport, ack_intr,
165 // &gayle_iops,
166 IRQ_AMIGA_PORTS);
168 index = ide_register_hw(&hw, 1, &hwif);
169 if (index != -1) {
170 hwif->mmio = 1;
171 switch (i) {
172 case 0:
173 printk("ide%d: Gayle IDE interface (A%d style)\n", index,
174 a4000 ? 4000 : 1200);
175 break;
176 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
177 case 1:
178 printk("ide%d: IDE doubler\n", index);
179 break;
180 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
182 } else
183 release_mem_region(res_start, res_n);