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1da177e4 LT |
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 | ||
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 | ||
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 | ||
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 | unsigned long 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 = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); | |
143 | ack_intr = gayle_ack_intr_a4000; | |
144 | } else { | |
145 | phys_base = GAYLE_BASE_1200; | |
146 | irqport = (unsigned long)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 = (unsigned long)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 | } |