Commit | Line | Data |
---|---|---|
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> | |
1da177e4 LT |
15 | #include <linux/ide.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/zorro.h> | |
513f3c10 | 18 | #include <linux/module.h> |
1da177e4 LT |
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 | ||
73dc532b BZ |
33 | #define GAYLE_IDEREG_SIZE 0x2000 |
34 | ||
1da177e4 LT |
35 | /* |
36 | * Offsets from one of the above bases | |
37 | */ | |
38 | ||
1da177e4 LT |
39 | #define GAYLE_CONTROL 0x101a |
40 | ||
1da177e4 LT |
41 | /* |
42 | * These are at different offsets from the base | |
43 | */ | |
44 | ||
45 | #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */ | |
46 | #define GAYLE_IRQ_1200 0xda9000 /* interrupt */ | |
47 | ||
48 | ||
49 | /* | |
50 | * Offset of the secondary port for IDE doublers | |
51 | * Note that GAYLE_CONTROL is NOT available then! | |
52 | */ | |
53 | ||
54 | #define GAYLE_NEXT_PORT 0x1000 | |
55 | ||
56 | #ifndef CONFIG_BLK_DEV_IDEDOUBLER | |
57 | #define GAYLE_NUM_HWIFS 1 | |
58 | #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS | |
59 | #define GAYLE_HAS_CONTROL_REG 1 | |
1da177e4 LT |
60 | #else /* CONFIG_BLK_DEV_IDEDOUBLER */ |
61 | #define GAYLE_NUM_HWIFS 2 | |
62 | #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \ | |
63 | GAYLE_NUM_HWIFS-1) | |
64 | #define GAYLE_HAS_CONTROL_REG (!ide_doubler) | |
513f3c10 | 65 | |
931ee0dc | 66 | static int ide_doubler; |
9dcba7f2 BZ |
67 | module_param_named(doubler, ide_doubler, bool, 0); |
68 | MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); | |
1da177e4 LT |
69 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ |
70 | ||
71 | ||
72 | /* | |
73 | * Check and acknowledge the interrupt status | |
74 | */ | |
75 | ||
76 | static int gayle_ack_intr_a4000(ide_hwif_t *hwif) | |
77 | { | |
78 | unsigned char ch; | |
79 | ||
4c3032d8 | 80 | ch = z_readb(hwif->io_ports.irq_addr); |
1da177e4 LT |
81 | if (!(ch & GAYLE_IRQ_IDE)) |
82 | return 0; | |
83 | return 1; | |
84 | } | |
85 | ||
86 | static int gayle_ack_intr_a1200(ide_hwif_t *hwif) | |
87 | { | |
88 | unsigned char ch; | |
89 | ||
4c3032d8 | 90 | ch = z_readb(hwif->io_ports.irq_addr); |
1da177e4 LT |
91 | if (!(ch & GAYLE_IRQ_IDE)) |
92 | return 0; | |
4c3032d8 BZ |
93 | (void)z_readb(hwif->io_ports.status_addr); |
94 | z_writeb(0x7c, hwif->io_ports.irq_addr); | |
1da177e4 LT |
95 | return 1; |
96 | } | |
97 | ||
29dd5975 BZ |
98 | static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base, |
99 | unsigned long ctl, unsigned long irq_port, | |
56efa7b0 | 100 | ide_ack_intr_t *ack_intr) |
29dd5975 BZ |
101 | { |
102 | int i; | |
103 | ||
104 | memset(hw, 0, sizeof(*hw)); | |
105 | ||
4c3032d8 | 106 | hw->io_ports.data_addr = base; |
29dd5975 BZ |
107 | |
108 | for (i = 1; i < 8; i++) | |
4c3032d8 | 109 | hw->io_ports_array[i] = base + 2 + i * 4; |
29dd5975 | 110 | |
4c3032d8 BZ |
111 | hw->io_ports.ctl_addr = ctl; |
112 | hw->io_ports.irq_addr = irq_port; | |
29dd5975 BZ |
113 | |
114 | hw->irq = IRQ_AMIGA_PORTS; | |
115 | hw->ack_intr = ack_intr; | |
d427e836 BZ |
116 | |
117 | hw->chipset = ide_generic; | |
29dd5975 BZ |
118 | } |
119 | ||
1da177e4 LT |
120 | /* |
121 | * Probe for a Gayle IDE interface (and optionally for an IDE doubler) | |
122 | */ | |
123 | ||
ade2daf9 | 124 | static int __init gayle_init(void) |
1da177e4 | 125 | { |
73dc532b BZ |
126 | unsigned long phys_base, res_start, res_n; |
127 | unsigned long base, ctrlport, irqport; | |
128 | ide_ack_intr_t *ack_intr; | |
96cc112c | 129 | int a4000, i, rc; |
c97c6aca | 130 | hw_regs_t hw[GAYLE_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL }; |
1da177e4 LT |
131 | |
132 | if (!MACH_IS_AMIGA) | |
ade2daf9 | 133 | return -ENODEV; |
1da177e4 LT |
134 | |
135 | if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) | |
136 | goto found; | |
137 | ||
138 | #ifdef CONFIG_ZORRO | |
139 | if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, | |
140 | NULL)) | |
141 | goto found; | |
142 | #endif | |
ade2daf9 | 143 | return -ENODEV; |
1da177e4 LT |
144 | |
145 | found: | |
c99c92c5 BZ |
146 | printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n", |
147 | a4000 ? 4000 : 1200, | |
148 | #ifdef CONFIG_BLK_DEV_IDEDOUBLER | |
149 | ide_doubler ? ", IDE doubler" : | |
150 | #endif | |
151 | ""); | |
152 | ||
1da177e4 LT |
153 | if (a4000) { |
154 | phys_base = GAYLE_BASE_4000; | |
155 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); | |
156 | ack_intr = gayle_ack_intr_a4000; | |
157 | } else { | |
158 | phys_base = GAYLE_BASE_1200; | |
159 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); | |
160 | ack_intr = gayle_ack_intr_a1200; | |
161 | } | |
162 | /* | |
163 | * FIXME: we now have selectable modes between mmio v/s iomio | |
164 | */ | |
165 | ||
1da177e4 LT |
166 | res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); |
167 | res_n = GAYLE_IDEREG_SIZE; | |
168 | ||
169 | if (!request_mem_region(res_start, res_n, "IDE")) | |
73dc532b | 170 | return -EBUSY; |
1da177e4 | 171 | |
73dc532b | 172 | for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { |
73dc532b | 173 | base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT); |
1da177e4 LT |
174 | ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; |
175 | ||
c97c6aca | 176 | gayle_setup_ports(&hw[i], base, ctrlport, irqport, ack_intr); |
1da177e4 | 177 | |
48c3c107 | 178 | hws[i] = &hw[i]; |
1da177e4 | 179 | } |
8ac4ce74 | 180 | |
96cc112c BZ |
181 | rc = ide_host_add(NULL, hws, NULL); |
182 | if (rc) | |
183 | release_mem_region(res_start, res_n); | |
184 | ||
185 | return rc; | |
1da177e4 | 186 | } |
ade2daf9 BZ |
187 | |
188 | module_init(gayle_init); | |
6e1d17da AB |
189 | |
190 | MODULE_LICENSE("GPL"); |