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1da177e4 LT |
1 | /* |
2 | * $Id: zorro.c,v 1.1.2.1 1998/06/07 23:21:02 geert Exp $ | |
3 | * | |
4 | * Zorro Bus Services | |
5 | * | |
6 | * Copyright (C) 1995-2003 Geert Uytterhoeven | |
7 | * | |
8 | * This file is subject to the terms and conditions of the GNU General Public | |
9 | * License. See the file COPYING in the main directory of this archive | |
10 | * for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/zorro.h> | |
18 | #include <linux/bitops.h> | |
4e57b681 TS |
19 | #include <linux/string.h> |
20 | ||
1da177e4 LT |
21 | #include <asm/setup.h> |
22 | #include <asm/amigahw.h> | |
23 | ||
24 | #include "zorro.h" | |
25 | ||
26 | ||
27 | /* | |
28 | * Zorro Expansion Devices | |
29 | */ | |
30 | ||
31 | u_int zorro_num_autocon = 0; | |
32 | struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO]; | |
33 | ||
34 | ||
35 | /* | |
36 | * Single Zorro bus | |
37 | */ | |
38 | ||
39 | struct zorro_bus zorro_bus = {\ | |
40 | .resources = { | |
41 | /* Zorro II regions (on Zorro II/III) */ | |
42 | { .name = "Zorro II exp", .start = 0x00e80000, .end = 0x00efffff }, | |
43 | { .name = "Zorro II mem", .start = 0x00200000, .end = 0x009fffff }, | |
44 | /* Zorro III regions (on Zorro III only) */ | |
45 | { .name = "Zorro III exp", .start = 0xff000000, .end = 0xffffffff }, | |
46 | { .name = "Zorro III cfg", .start = 0x40000000, .end = 0x7fffffff } | |
47 | }, | |
48 | .name = "Zorro bus" | |
49 | }; | |
50 | ||
51 | ||
52 | /* | |
53 | * Find Zorro Devices | |
54 | */ | |
55 | ||
56 | struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) | |
57 | { | |
58 | struct zorro_dev *z; | |
59 | ||
60 | if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) | |
61 | return NULL; | |
62 | ||
63 | for (z = from ? from+1 : &zorro_autocon[0]; | |
64 | z < zorro_autocon+zorro_num_autocon; | |
65 | z++) | |
66 | if (id == ZORRO_WILDCARD || id == z->id) | |
67 | return z; | |
68 | return NULL; | |
69 | } | |
70 | ||
71 | ||
72 | /* | |
73 | * Bitmask indicating portions of available Zorro II RAM that are unused | |
74 | * by the system. Every bit represents a 64K chunk, for a maximum of 8MB | |
75 | * (128 chunks, physical 0x00200000-0x009fffff). | |
76 | * | |
77 | * If you want to use (= allocate) portions of this RAM, you should clear | |
78 | * the corresponding bits. | |
79 | * | |
80 | * Possible uses: | |
81 | * - z2ram device | |
82 | * - SCSI DMA bounce buffers | |
83 | * | |
84 | * FIXME: use the normal resource management | |
85 | */ | |
86 | ||
87 | DECLARE_BITMAP(zorro_unused_z2ram, 128); | |
88 | ||
89 | ||
90 | static void __init mark_region(unsigned long start, unsigned long end, | |
91 | int flag) | |
92 | { | |
93 | if (flag) | |
94 | start += Z2RAM_CHUNKMASK; | |
95 | else | |
96 | end += Z2RAM_CHUNKMASK; | |
97 | start &= ~Z2RAM_CHUNKMASK; | |
98 | end &= ~Z2RAM_CHUNKMASK; | |
99 | ||
100 | if (end <= Z2RAM_START || start >= Z2RAM_END) | |
101 | return; | |
102 | start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START; | |
103 | end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START; | |
104 | while (start < end) { | |
105 | u32 chunk = start>>Z2RAM_CHUNKSHIFT; | |
106 | if (flag) | |
107 | set_bit(chunk, zorro_unused_z2ram); | |
108 | else | |
109 | clear_bit(chunk, zorro_unused_z2ram); | |
110 | start += Z2RAM_CHUNKSIZE; | |
111 | } | |
112 | } | |
113 | ||
114 | ||
115 | static struct resource __init *zorro_find_parent_resource(struct zorro_dev *z) | |
116 | { | |
117 | int i; | |
118 | ||
119 | for (i = 0; i < zorro_bus.num_resources; i++) | |
120 | if (zorro_resource_start(z) >= zorro_bus.resources[i].start && | |
121 | zorro_resource_end(z) <= zorro_bus.resources[i].end) | |
122 | return &zorro_bus.resources[i]; | |
123 | return &iomem_resource; | |
124 | } | |
125 | ||
126 | ||
127 | /* | |
128 | * Initialization | |
129 | */ | |
130 | ||
131 | static int __init zorro_init(void) | |
132 | { | |
133 | struct zorro_dev *z; | |
134 | unsigned int i; | |
135 | ||
136 | if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) | |
137 | return 0; | |
138 | ||
139 | pr_info("Zorro: Probing AutoConfig expansion devices: %d device%s\n", | |
140 | zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s"); | |
141 | ||
142 | /* Initialize the Zorro bus */ | |
143 | INIT_LIST_HEAD(&zorro_bus.devices); | |
144 | strcpy(zorro_bus.dev.bus_id, "zorro"); | |
145 | device_register(&zorro_bus.dev); | |
146 | ||
147 | /* Request the resources */ | |
148 | zorro_bus.num_resources = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2; | |
149 | for (i = 0; i < zorro_bus.num_resources; i++) | |
150 | request_resource(&iomem_resource, &zorro_bus.resources[i]); | |
151 | ||
152 | /* Register all devices */ | |
153 | for (i = 0; i < zorro_num_autocon; i++) { | |
154 | z = &zorro_autocon[i]; | |
155 | z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8); | |
156 | if (z->id == ZORRO_PROD_GVP_EPC_BASE) { | |
157 | /* GVP quirk */ | |
158 | unsigned long magic = zorro_resource_start(z)+0x8000; | |
159 | z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK; | |
160 | } | |
161 | sprintf(z->name, "Zorro device %08x", z->id); | |
162 | zorro_name_device(z); | |
163 | z->resource.name = z->name; | |
164 | if (request_resource(zorro_find_parent_resource(z), &z->resource)) | |
165 | printk(KERN_ERR "Zorro: Address space collision on device %s " | |
166 | "[%lx:%lx]\n", | |
31817576 GU |
167 | z->name, (unsigned long)zorro_resource_start(z), |
168 | (unsigned long)zorro_resource_end(z)); | |
1da177e4 LT |
169 | sprintf(z->dev.bus_id, "%02x", i); |
170 | z->dev.parent = &zorro_bus.dev; | |
171 | z->dev.bus = &zorro_bus_type; | |
172 | device_register(&z->dev); | |
173 | zorro_create_sysfs_dev_files(z); | |
174 | } | |
175 | ||
176 | /* Mark all available Zorro II memory */ | |
177 | zorro_for_each_dev(z) { | |
178 | if (z->rom.er_Type & ERTF_MEMLIST) | |
179 | mark_region(zorro_resource_start(z), zorro_resource_end(z)+1, 1); | |
180 | } | |
181 | ||
182 | /* Unmark all used Zorro II memory */ | |
183 | for (i = 0; i < m68k_num_memory; i++) | |
184 | if (m68k_memory[i].addr < 16*1024*1024) | |
185 | mark_region(m68k_memory[i].addr, | |
186 | m68k_memory[i].addr+m68k_memory[i].size, 0); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | subsys_initcall(zorro_init); | |
192 | ||
193 | EXPORT_SYMBOL(zorro_find_device); | |
194 | EXPORT_SYMBOL(zorro_unused_z2ram); | |
195 | ||
196 | MODULE_LICENSE("GPL"); |