1 /*
2 * linux/drivers/ide/legacy/gayle.c -- Amiga Gayle IDE Driver
3 *
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
11 #include <linux/config.h>
12 #include <linux/types.h>
13 #include <linux/mm.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>
20
21 #include <asm/setup.h>
22 #include <asm/amigahw.h>
23 #include <asm/amigaints.h>
24 #include <asm/amigayle.h>
25
26
27 /*
28 * Bases of the IDE interfaces
29 */
30
31 #define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
32 #define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
33
34 /*
35 * Offsets from one of the above bases
36 */
37
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
47
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
51 };
52
53
54 /*
55 * These are at different offsets from the base
56 */
57
58 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
59 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
60
61
62 /*
63 * Offset of the secondary port for IDE doublers
64 * Note that GAYLE_CONTROL is NOT available then!
65 */
66
67 #define GAYLE_NEXT_PORT 0x1000
68
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 : \
77 GAYLE_NUM_HWIFS-1)
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 */
82
83
84 /*
85 * Check and acknowledge the interrupt status
86 */
87
gayle_ack_intr_a4000(ide_hwif_t * hwif)88 static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
89 {
90 unsigned char ch;
91
92 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
93 if (!(ch & GAYLE_IRQ_IDE))
94 return 0;
95 return 1;
96 }
97
gayle_ack_intr_a1200(ide_hwif_t * hwif)98 static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
99 {
100 unsigned char ch;
101
102 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
103 if (!(ch & GAYLE_IRQ_IDE))
104 return 0;
105 (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
106 z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
107 return 1;
108 }
109
110 /*
111 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
112 */
113
gayle_init(void)114 void __init gayle_init(void)
115 {
116 int a4000, i;
117
118 if (!MACH_IS_AMIGA)
119 return;
120
121 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
122 goto found;
123
124 #ifdef CONFIG_ZORRO
125 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
126 NULL))
127 goto found;
128 #endif
129 return;
130
131 found:
132 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
133 ide_ioreg_t base, ctrlport, irqport;
134 ide_ack_intr_t *ack_intr;
135 hw_regs_t hw;
136 ide_hwif_t *hwif;
137 int index;
138 unsigned long phys_base, res_start, res_n;
139
140 if (a4000) {
141 phys_base = GAYLE_BASE_4000;
142 irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_4000);
143 ack_intr = gayle_ack_intr_a4000;
144 } else {
145 phys_base = GAYLE_BASE_1200;
146 irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_1200);
147 ack_intr = gayle_ack_intr_a1200;
148 }
149 /*
150 * FIXME: we now have selectable modes between mmio v/s iomio
151 */
152
153 phys_base += i*GAYLE_NEXT_PORT;
154
155 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
156 res_n = GAYLE_IDEREG_SIZE;
157
158 if (!request_mem_region(res_start, res_n, "IDE"))
159 continue;
160
161 base = (ide_ioreg_t)ZTWO_VADDR(phys_base);
162 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
163
164 ide_setup_ports(&hw, base, gayle_offsets,
165 ctrlport, irqport, ack_intr,
166 // &gayle_iops,
167 IRQ_AMIGA_PORTS);
168
169 index = ide_register_hw(&hw, &hwif);
170 if (index != -1) {
171 hwif->mmio = 2;
172 switch (i) {
173 case 0:
174 printk("ide%d: Gayle IDE interface (A%d style)\n", index,
175 a4000 ? 4000 : 1200);
176 break;
177 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
178 case 1:
179 printk("ide%d: IDE doubler\n", index);
180 break;
181 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
182 }
183 } else
184 release_mem_region(res_start, res_n);
185 }
186 }
187