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1/*
2 * Zorro Bus Services
3 *
4 * Copyright (C) 1995-2003 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
8 * for more details.
9 */
10
11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/zorro.h>
16#include <linux/bitops.h>
17#include <linux/string.h>
18#include <linux/platform_device.h>
19#include <linux/dma-mapping.h>
20#include <linux/slab.h>
21
22#include <asm/byteorder.h>
23#include <asm/setup.h>
24#include <asm/amigahw.h>
25
26#include "zorro.h"
27
28
29 /*
30 * Zorro Expansion Devices
31 */
32
33unsigned int zorro_num_autocon;
34struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata;
35struct zorro_dev *zorro_autocon;
36
37
38 /*
39 * Zorro bus
40 */
41
42struct zorro_bus {
43 struct device dev;
44 struct zorro_dev devices[0];
45};
46
47
48 /*
49 * Find Zorro Devices
50 */
51
52struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)
53{
54 struct zorro_dev *z;
55
56 if (!zorro_num_autocon)
57 return NULL;
58
59 for (z = from ? from+1 : &zorro_autocon[0];
60 z < zorro_autocon+zorro_num_autocon;
61 z++)
62 if (id == ZORRO_WILDCARD || id == z->id)
63 return z;
64 return NULL;
65}
66EXPORT_SYMBOL(zorro_find_device);
67
68
69 /*
70 * Bitmask indicating portions of available Zorro II RAM that are unused
71 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB
72 * (128 chunks, physical 0x00200000-0x009fffff).
73 *
74 * If you want to use (= allocate) portions of this RAM, you should clear
75 * the corresponding bits.
76 *
77 * Possible uses:
78 * - z2ram device
79 * - SCSI DMA bounce buffers
80 *
81 * FIXME: use the normal resource management
82 */
83
84DECLARE_BITMAP(zorro_unused_z2ram, 128);
85EXPORT_SYMBOL(zorro_unused_z2ram);
86
87
88static void __init mark_region(unsigned long start, unsigned long end,
89 int flag)
90{
91 if (flag)
92 start += Z2RAM_CHUNKMASK;
93 else
94 end += Z2RAM_CHUNKMASK;
95 start &= ~Z2RAM_CHUNKMASK;
96 end &= ~Z2RAM_CHUNKMASK;
97
98 if (end <= Z2RAM_START || start >= Z2RAM_END)
99 return;
100 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START;
101 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START;
102 while (start < end) {
103 u32 chunk = start>>Z2RAM_CHUNKSHIFT;
104
105 if (flag)
106 set_bit(chunk, zorro_unused_z2ram);
107 else
108 clear_bit(chunk, zorro_unused_z2ram);
109 start += Z2RAM_CHUNKSIZE;
110 }
111}
112
113
114static struct resource __init *zorro_find_parent_resource(
115 struct platform_device *bridge, struct zorro_dev *z)
116{
117 int i;
118
119 for (i = 0; i < bridge->num_resources; i++) {
120 struct resource *r = &bridge->resource[i];
121
122 if (zorro_resource_start(z) >= r->start &&
123 zorro_resource_end(z) <= r->end)
124 return r;
125 }
126 return &iomem_resource;
127}
128
129
130
131static int __init amiga_zorro_probe(struct platform_device *pdev)
132{
133 struct zorro_bus *bus;
134 struct zorro_dev_init *zi;
135 struct zorro_dev *z;
136 struct resource *r;
137 unsigned int i;
138 int error;
139
140 /* Initialize the Zorro bus */
141 bus = kzalloc(struct_size(bus, devices, zorro_num_autocon),
142 GFP_KERNEL);
143 if (!bus)
144 return -ENOMEM;
145
146 zorro_autocon = bus->devices;
147 bus->dev.parent = &pdev->dev;
148 dev_set_name(&bus->dev, zorro_bus_type.name);
149 error = device_register(&bus->dev);
150 if (error) {
151 pr_err("Zorro: Error registering zorro_bus\n");
152 put_device(&bus->dev);
153 kfree(bus);
154 return error;
155 }
156 platform_set_drvdata(pdev, bus);
157
158 pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n",
159 zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
160
161 /* First identify all devices ... */
162 for (i = 0; i < zorro_num_autocon; i++) {
163 zi = &zorro_autocon_init[i];
164 z = &zorro_autocon[i];
165
166 z->rom = zi->rom;
167 z->id = (be16_to_cpu(z->rom.er_Manufacturer) << 16) |
168 (z->rom.er_Product << 8);
169 if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
170 /* GVP quirk */
171 unsigned long magic = zi->boardaddr + 0x8000;
172
173 z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
174 }
175 z->slotaddr = zi->slotaddr;
176 z->slotsize = zi->slotsize;
177 sprintf(z->name, "Zorro device %08x", z->id);
178 zorro_name_device(z);
179 z->resource.start = zi->boardaddr;
180 z->resource.end = zi->boardaddr + zi->boardsize - 1;
181 z->resource.name = z->name;
182 r = zorro_find_parent_resource(pdev, z);
183 error = request_resource(r, &z->resource);
184 if (error)
185 dev_err(&bus->dev,
186 "Address space collision on device %s %pR\n",
187 z->name, &z->resource);
188 z->dev.parent = &bus->dev;
189 z->dev.bus = &zorro_bus_type;
190 z->dev.id = i;
191 switch (z->rom.er_Type & ERT_TYPEMASK) {
192 case ERT_ZORROIII:
193 z->dev.coherent_dma_mask = DMA_BIT_MASK(32);
194 break;
195
196 case ERT_ZORROII:
197 default:
198 z->dev.coherent_dma_mask = DMA_BIT_MASK(24);
199 break;
200 }
201 z->dev.dma_mask = &z->dev.coherent_dma_mask;
202 }
203
204 /* ... then register them */
205 for (i = 0; i < zorro_num_autocon; i++) {
206 z = &zorro_autocon[i];
207 error = device_register(&z->dev);
208 if (error) {
209 dev_err(&bus->dev, "Error registering device %s\n",
210 z->name);
211 put_device(&z->dev);
212 continue;
213 }
214 }
215
216 /* Mark all available Zorro II memory */
217 zorro_for_each_dev(z) {
218 if (z->rom.er_Type & ERTF_MEMLIST)
219 mark_region(zorro_resource_start(z),
220 zorro_resource_end(z)+1, 1);
221 }
222
223 /* Unmark all used Zorro II memory */
224 for (i = 0; i < m68k_num_memory; i++)
225 if (m68k_memory[i].addr < 16*1024*1024)
226 mark_region(m68k_memory[i].addr,
227 m68k_memory[i].addr+m68k_memory[i].size,
228 0);
229
230 return 0;
231}
232
233static struct platform_driver amiga_zorro_driver = {
234 .driver = {
235 .name = "amiga-zorro",
236 },
237};
238
239static int __init amiga_zorro_init(void)
240{
241 return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe);
242}
243
244module_init(amiga_zorro_init);
245
246MODULE_LICENSE("GPL");
247

Warning: That file was not part of the compilation database. It may have many parsing errors.