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Commit | Line | Data |
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1da177e4 | 1 | /* |
58f189fc | 2 | * Amiga Gayle IDE Driver |
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
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 | ||
1da177e4 LT |
37 | #define GAYLE_CONTROL 0x101a |
38 | ||
1da177e4 LT |
39 | /* |
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) | |
65 | int ide_doubler = 0; /* support IDE doublers? */ | |
9dcba7f2 BZ |
66 | module_param_named(doubler, ide_doubler, bool, 0); |
67 | MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); | |
1da177e4 LT |
68 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ |
69 | ||
70 | ||
71 | /* | |
72 | * Check and acknowledge the interrupt status | |
73 | */ | |
74 | ||
75 | static int gayle_ack_intr_a4000(ide_hwif_t *hwif) | |
76 | { | |
77 | unsigned char ch; | |
78 | ||
4c3032d8 | 79 | ch = z_readb(hwif->io_ports.irq_addr); |
1da177e4 LT |
80 | if (!(ch & GAYLE_IRQ_IDE)) |
81 | return 0; | |
82 | return 1; | |
83 | } | |
84 | ||
85 | static int gayle_ack_intr_a1200(ide_hwif_t *hwif) | |
86 | { | |
87 | unsigned char ch; | |
88 | ||
4c3032d8 | 89 | ch = z_readb(hwif->io_ports.irq_addr); |
1da177e4 LT |
90 | if (!(ch & GAYLE_IRQ_IDE)) |
91 | return 0; | |
4c3032d8 BZ |
92 | (void)z_readb(hwif->io_ports.status_addr); |
93 | z_writeb(0x7c, hwif->io_ports.irq_addr); | |
1da177e4 LT |
94 | return 1; |
95 | } | |
96 | ||
29dd5975 BZ |
97 | static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base, |
98 | unsigned long ctl, unsigned long irq_port, | |
56efa7b0 | 99 | ide_ack_intr_t *ack_intr) |
29dd5975 BZ |
100 | { |
101 | int i; | |
102 | ||
103 | memset(hw, 0, sizeof(*hw)); | |
104 | ||
4c3032d8 | 105 | hw->io_ports.data_addr = base; |
29dd5975 BZ |
106 | |
107 | for (i = 1; i < 8; i++) | |
4c3032d8 | 108 | hw->io_ports_array[i] = base + 2 + i * 4; |
29dd5975 | 109 | |
4c3032d8 BZ |
110 | hw->io_ports.ctl_addr = ctl; |
111 | hw->io_ports.irq_addr = irq_port; | |
29dd5975 BZ |
112 | |
113 | hw->irq = IRQ_AMIGA_PORTS; | |
114 | hw->ack_intr = ack_intr; | |
d427e836 BZ |
115 | |
116 | hw->chipset = ide_generic; | |
29dd5975 BZ |
117 | } |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Probe for a Gayle IDE interface (and optionally for an IDE doubler) | |
121 | */ | |
122 | ||
ade2daf9 | 123 | static int __init gayle_init(void) |
1da177e4 LT |
124 | { |
125 | int a4000, i; | |
8ac4ce74 | 126 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
1da177e4 LT |
127 | |
128 | if (!MACH_IS_AMIGA) | |
ade2daf9 | 129 | return -ENODEV; |
1da177e4 LT |
130 | |
131 | if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) | |
132 | goto found; | |
133 | ||
134 | #ifdef CONFIG_ZORRO | |
135 | if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, | |
136 | NULL)) | |
137 | goto found; | |
138 | #endif | |
ade2daf9 | 139 | return -ENODEV; |
1da177e4 LT |
140 | |
141 | found: | |
c99c92c5 BZ |
142 | printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n", |
143 | a4000 ? 4000 : 1200, | |
144 | #ifdef CONFIG_BLK_DEV_IDEDOUBLER | |
145 | ide_doubler ? ", IDE doubler" : | |
146 | #endif | |
147 | ""); | |
148 | ||
1da177e4 LT |
149 | for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { |
150 | unsigned long base, ctrlport, irqport; | |
151 | ide_ack_intr_t *ack_intr; | |
152 | hw_regs_t hw; | |
153 | ide_hwif_t *hwif; | |
1da177e4 LT |
154 | unsigned long phys_base, res_start, res_n; |
155 | ||
156 | if (a4000) { | |
157 | phys_base = GAYLE_BASE_4000; | |
158 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); | |
159 | ack_intr = gayle_ack_intr_a4000; | |
160 | } else { | |
161 | phys_base = GAYLE_BASE_1200; | |
162 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); | |
163 | ack_intr = gayle_ack_intr_a1200; | |
164 | } | |
165 | /* | |
166 | * FIXME: we now have selectable modes between mmio v/s iomio | |
167 | */ | |
168 | ||
169 | phys_base += i*GAYLE_NEXT_PORT; | |
170 | ||
171 | res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); | |
172 | res_n = GAYLE_IDEREG_SIZE; | |
173 | ||
174 | if (!request_mem_region(res_start, res_n, "IDE")) | |
175 | continue; | |
176 | ||
177 | base = (unsigned long)ZTWO_VADDR(phys_base); | |
178 | ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; | |
179 | ||
29dd5975 | 180 | gayle_setup_ports(&hw, base, ctrlport, irqport, ack_intr); |
1da177e4 | 181 | |
59bff5ba | 182 | hwif = ide_find_port(); |
cbb010c1 BZ |
183 | if (hwif) { |
184 | u8 index = hwif->index; | |
185 | ||
186 | ide_init_port_data(hwif, index); | |
187 | ide_init_port_hw(hwif, &hw); | |
188 | ||
8ac4ce74 | 189 | idx[i] = index; |
1da177e4 LT |
190 | } else |
191 | release_mem_region(res_start, res_n); | |
192 | } | |
8ac4ce74 | 193 | |
c413b9b9 | 194 | ide_device_add(idx, NULL); |
ade2daf9 BZ |
195 | |
196 | return 0; | |
1da177e4 | 197 | } |
ade2daf9 BZ |
198 | |
199 | module_init(gayle_init); | |
6e1d17da AB |
200 | |
201 | MODULE_LICENSE("GPL"); |