]>
Commit | Line | Data |
---|---|---|
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"); |