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1 | /* |
2 | * 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/types.h> |
12 | #include <linux/mm.h> |
13 | #include <linux/interrupt.h> |
14 | #include <linux/blkdev.h> |
15 | #include <linux/ide.h> |
16 | #include <linux/init.h> |
17 | #include <linux/zorro.h> |
18 | #include <linux/module.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 | #define GAYLE_IDEREG_SIZE 0x2000 |
34 | |
35 | /* |
36 | * Offsets from one of the above bases |
37 | */ |
38 | |
39 | #define GAYLE_CONTROL 0x101a |
40 | |
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 | #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) |
60 | |
61 | static int ide_doubler; |
62 | module_param_named(doubler, ide_doubler, bool, 0); |
63 | MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); |
64 | |
65 | /* |
66 | * Check and acknowledge the interrupt status |
67 | */ |
68 | |
69 | static int gayle_test_irq(ide_hwif_t *hwif) |
70 | { |
71 | unsigned char ch; |
72 | |
73 | ch = z_readb(hwif->io_ports.irq_addr); |
74 | if (!(ch & GAYLE_IRQ_IDE)) |
75 | return 0; |
76 | return 1; |
77 | } |
78 | |
79 | static void gayle_a1200_clear_irq(ide_drive_t *drive) |
80 | { |
81 | ide_hwif_t *hwif = drive->hwif; |
82 | |
83 | (void)z_readb(hwif->io_ports.status_addr); |
84 | z_writeb(0x7c, hwif->io_ports.irq_addr); |
85 | } |
86 | |
87 | static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base, |
88 | unsigned long ctl, unsigned long irq_port) |
89 | { |
90 | int i; |
91 | |
92 | memset(hw, 0, sizeof(*hw)); |
93 | |
94 | hw->io_ports.data_addr = base; |
95 | |
96 | for (i = 1; i < 8; i++) |
97 | hw->io_ports_array[i] = base + 2 + i * 4; |
98 | |
99 | hw->io_ports.ctl_addr = ctl; |
100 | hw->io_ports.irq_addr = irq_port; |
101 | |
102 | hw->irq = IRQ_AMIGA_PORTS; |
103 | } |
104 | |
105 | static const struct ide_port_ops gayle_a4000_port_ops = { |
106 | .test_irq = gayle_test_irq, |
107 | }; |
108 | |
109 | static const struct ide_port_ops gayle_a1200_port_ops = { |
110 | .clear_irq = gayle_a1200_clear_irq, |
111 | .test_irq = gayle_test_irq, |
112 | }; |
113 | |
114 | static const struct ide_port_info gayle_port_info = { |
115 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE | |
116 | IDE_HFLAG_NO_DMA, |
117 | .irq_flags = IRQF_SHARED, |
118 | .chipset = ide_generic, |
119 | }; |
120 | |
121 | /* |
122 | * Probe for a Gayle IDE interface (and optionally for an IDE doubler) |
123 | */ |
124 | |
125 | static int __init gayle_init(void) |
126 | { |
127 | unsigned long phys_base, res_start, res_n; |
128 | unsigned long base, ctrlport, irqport; |
129 | int a4000, i, rc; |
130 | struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS]; |
131 | struct ide_port_info d = gayle_port_info; |
132 | |
133 | if (!MACH_IS_AMIGA) |
134 | return -ENODEV; |
135 | |
136 | if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) |
137 | goto found; |
138 | |
139 | #ifdef CONFIG_ZORRO |
140 | if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, |
141 | NULL)) |
142 | goto found; |
143 | #endif |
144 | return -ENODEV; |
145 | |
146 | found: |
147 | printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n", |
148 | a4000 ? 4000 : 1200, |
149 | ide_doubler ? ", IDE doubler" : ""); |
150 | |
151 | if (a4000) { |
152 | phys_base = GAYLE_BASE_4000; |
153 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); |
154 | d.port_ops = &gayle_a4000_port_ops; |
155 | } else { |
156 | phys_base = GAYLE_BASE_1200; |
157 | irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); |
158 | d.port_ops = &gayle_a1200_port_ops; |
159 | } |
160 | |
161 | res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); |
162 | res_n = GAYLE_IDEREG_SIZE; |
163 | |
164 | if (!request_mem_region(res_start, res_n, "IDE")) |
165 | return -EBUSY; |
166 | |
167 | for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { |
168 | base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT); |
169 | ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; |
170 | |
171 | gayle_setup_ports(&hw[i], base, ctrlport, irqport); |
172 | |
173 | hws[i] = &hw[i]; |
174 | } |
175 | |
176 | rc = ide_host_add(&d, hws, i, NULL); |
177 | if (rc) |
178 | release_mem_region(res_start, res_n); |
179 | |
180 | return rc; |
181 | } |
182 | |
183 | module_init(gayle_init); |
184 | |
185 | MODULE_LICENSE("GPL"); |
186 |
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