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