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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz58f189f2008-02-01 23:09:33 +01002 * Amiga Gayle IDE Driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Created 9 Jul 1997 by Geert Uytterhoeven
5 *
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 */
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#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>
19
20#include <asm/setup.h>
21#include <asm/amigahw.h>
22#include <asm/amigaints.h>
23#include <asm/amigayle.h>
24
25
26 /*
27 * Bases of the IDE interfaces
28 */
29
30#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
31#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
32
33 /*
34 * Offsets from one of the above bases
35 */
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#define GAYLE_CONTROL 0x101a
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 /*
40 * These are at different offsets from the base
41 */
42
43#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
44#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
45
46
47 /*
48 * Offset of the secondary port for IDE doublers
49 * Note that GAYLE_CONTROL is NOT available then!
50 */
51
52#define GAYLE_NEXT_PORT 0x1000
53
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 : \
62 GAYLE_NUM_HWIFS-1)
63#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
64#define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
65int ide_doubler = 0; /* support IDE doublers? */
66#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
67
68
69 /*
70 * Check and acknowledge the interrupt status
71 */
72
73static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
74{
75 unsigned char ch;
76
77 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
78 if (!(ch & GAYLE_IRQ_IDE))
79 return 0;
80 return 1;
81}
82
83static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
84{
85 unsigned char ch;
86
87 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
88 if (!(ch & GAYLE_IRQ_IDE))
89 return 0;
90 (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
91 z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
92 return 1;
93}
94
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010095static 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);
98{
99 int i;
100
101 memset(hw, 0, sizeof(*hw));
102
103 hw->io_ports[IDE_DATA_OFFSET] = base;
104
105 for (i = 1; i < 8; i++)
106 hw->io_ports[i] = base + 2 + i * 4;
107
108 hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
109 hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
110
111 hw->irq = IRQ_AMIGA_PORTS;
112 hw->ack_intr = ack_intr;
113}
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 /*
116 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
117 */
118
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100119static int __init gayle_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120{
121 int a4000, i;
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100122 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124 if (!MACH_IS_AMIGA)
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100125 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
128 goto found;
129
130#ifdef CONFIG_ZORRO
131 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
132 NULL))
133 goto found;
134#endif
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100135 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137found:
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +0100138 printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
139 a4000 ? 4000 : 1200,
140#ifdef CONFIG_BLK_DEV_IDEDOUBLER
141 ide_doubler ? ", IDE doubler" :
142#endif
143 "");
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
146 unsigned long base, ctrlport, irqport;
147 ide_ack_intr_t *ack_intr;
148 hw_regs_t hw;
149 ide_hwif_t *hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 unsigned long phys_base, res_start, res_n;
151
152 if (a4000) {
153 phys_base = GAYLE_BASE_4000;
154 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
155 ack_intr = gayle_ack_intr_a4000;
156 } else {
157 phys_base = GAYLE_BASE_1200;
158 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
159 ack_intr = gayle_ack_intr_a1200;
160 }
161/*
162 * FIXME: we now have selectable modes between mmio v/s iomio
163 */
164
165 phys_base += i*GAYLE_NEXT_PORT;
166
167 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
168 res_n = GAYLE_IDEREG_SIZE;
169
170 if (!request_mem_region(res_start, res_n, "IDE"))
171 continue;
172
173 base = (unsigned long)ZTWO_VADDR(phys_base);
174 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
175
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100176 gayle_setup_ports(&hw, base, ctrlport, irqport, ack_intr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100178 hwif = ide_find_port(base);
179 if (hwif) {
180 u8 index = hwif->index;
181
182 ide_init_port_data(hwif, index);
183 ide_init_port_hw(hwif, &hw);
184
Bartlomiej Zolnierkiewicz2ad1e552007-02-17 02:40:25 +0100185 hwif->mmio = 1;
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100186
187 idx[i] = index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 } else
189 release_mem_region(res_start, res_n);
190 }
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100191
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100192 ide_device_add(idx, NULL);
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100193
194 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100196
197module_init(gayle_init);