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 | ||
1da177e4 LT |
56 | #define GAYLE_NUM_HWIFS 2 |
57 | #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \ | |
58 | GAYLE_NUM_HWIFS-1) | |
59 | #define GAYLE_HAS_CONTROL_REG (!ide_doubler) | |
513f3c10 | 60 | |
931ee0dc | 61 | static int ide_doubler; |
9dcba7f2 BZ |
62 | module_param_named(doubler, ide_doubler, bool, 0); |
63 | MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); | |
1da177e4 LT |
64 | |
65 | /* | |
66 | * Check and acknowledge the interrupt status | |
67 | */ | |
68 | ||
69 | static int gayle_ack_intr_a4000(ide_hwif_t *hwif) | |
70 | { | |
71 | unsigned char ch; | |
72 | ||
4c3032d8 | 73 | ch = z_readb(hwif->io_ports.irq_addr); |
1da177e4 LT |
74 | if (!(ch & GAYLE_IRQ_IDE)) |
75 | return 0; | |
76 | return 1; | |
77 | } | |
78 | ||
79 | static int gayle_ack_intr_a1200(ide_hwif_t *hwif) | |
80 | { | |
81 | unsigned char ch; | |
82 | ||
4c3032d8 | 83 | ch = z_readb(hwif->io_ports.irq_addr); |
1da177e4 LT |
84 | if (!(ch & GAYLE_IRQ_IDE)) |
85 | return 0; | |
4c3032d8 BZ |
86 | (void)z_readb(hwif->io_ports.status_addr); |
87 | z_writeb(0x7c, hwif->io_ports.irq_addr); | |
1da177e4 LT |
88 | return 1; |
89 | } | |
90 | ||
29dd5975 BZ |
91 | static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base, |
92 | unsigned long ctl, unsigned long irq_port, | |
56efa7b0 | 93 | ide_ack_intr_t *ack_intr) |
29dd5975 BZ |
94 | { |
95 | int i; | |
96 | ||
97 | memset(hw, 0, sizeof(*hw)); | |
98 | ||
4c3032d8 | 99 | hw->io_ports.data_addr = base; |
29dd5975 BZ |
100 | |
101 | for (i = 1; i < 8; i++) | |
4c3032d8 | 102 | hw->io_ports_array[i] = base + 2 + i * 4; |
29dd5975 | 103 | |
4c3032d8 BZ |
104 | hw->io_ports.ctl_addr = ctl; |
105 | hw->io_ports.irq_addr = irq_port; | |
29dd5975 BZ |
106 | |
107 | hw->irq = IRQ_AMIGA_PORTS; | |
108 | hw->ack_intr = ack_intr; | |
d427e836 BZ |
109 | |
110 | hw->chipset = ide_generic; | |
29dd5975 BZ |
111 | } |
112 | ||
a4cd1a34 | 113 | static const struct ide_port_info gayle_port_info = { |
09a3e791 BZ |
114 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE | |
115 | IDE_HFLAG_NO_DMA, | |
255115fb | 116 | .irq_flags = IRQF_SHARED, |
a4cd1a34 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 | 124 | { |
73dc532b BZ |
125 | unsigned long phys_base, res_start, res_n; |
126 | unsigned long base, ctrlport, irqport; | |
127 | ide_ack_intr_t *ack_intr; | |
96cc112c | 128 | int a4000, i, rc; |
c97c6aca | 129 | hw_regs_t hw[GAYLE_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL }; |
1da177e4 LT |
130 | |
131 | if (!MACH_IS_AMIGA) | |
ade2daf9 | 132 | return -ENODEV; |
1da177e4 LT |
133 | |
134 | if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) | |
135 | goto found; | |
136 | ||
137 | #ifdef CONFIG_ZORRO | |
138 | if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, | |
139 | NULL)) | |
140 | goto found; | |
141 | #endif | |
ade2daf9 | 142 | return -ENODEV; |
1da177e4 LT |
143 | |
144 | found: | |
c99c92c5 BZ |
145 | printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n", |
146 | a4000 ? 4000 : 1200, | |
9f5af4d6 | 147 | ide_doubler ? ", IDE doubler" : ""); |
c99c92c5 | 148 | |
1da177e4 LT |
149 | if (a4000) { |
150 | phys_base = GAYLE_BASE_4000; | |
151 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); | |
152 | ack_intr = gayle_ack_intr_a4000; | |
153 | } else { | |
154 | phys_base = GAYLE_BASE_1200; | |
155 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); | |
156 | ack_intr = gayle_ack_intr_a1200; | |
157 | } | |
1da177e4 | 158 | |
1da177e4 LT |
159 | res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); |
160 | res_n = GAYLE_IDEREG_SIZE; | |
161 | ||
162 | if (!request_mem_region(res_start, res_n, "IDE")) | |
73dc532b | 163 | return -EBUSY; |
1da177e4 | 164 | |
73dc532b | 165 | for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { |
73dc532b | 166 | base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT); |
1da177e4 LT |
167 | ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; |
168 | ||
c97c6aca | 169 | gayle_setup_ports(&hw[i], base, ctrlport, irqport, ack_intr); |
1da177e4 | 170 | |
48c3c107 | 171 | hws[i] = &hw[i]; |
1da177e4 | 172 | } |
8ac4ce74 | 173 | |
a4cd1a34 | 174 | rc = ide_host_add(&gayle_port_info, hws, NULL); |
96cc112c BZ |
175 | if (rc) |
176 | release_mem_region(res_start, res_n); | |
177 | ||
178 | return rc; | |
1da177e4 | 179 | } |
ade2daf9 BZ |
180 | |
181 | module_init(gayle_init); | |
6e1d17da AB |
182 | |
183 | MODULE_LICENSE("GPL"); |