4 * Copyright (C) 1995-2003 Geert Uytterhoeven
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
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>
21 #include <asm/setup.h>
22 #include <asm/amigahw.h>
28 * Zorro Expansion Devices
31 unsigned int zorro_num_autocon;
32 struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];
40 struct list_head devices; /* list of devices on this bus */
49 struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)
53 if (!zorro_num_autocon)
56 for (z = from ? from+1 : &zorro_autocon[0];
57 z < zorro_autocon+zorro_num_autocon;
59 if (id == ZORRO_WILDCARD || id == z->id)
63 EXPORT_SYMBOL(zorro_find_device);
67 * Bitmask indicating portions of available Zorro II RAM that are unused
68 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB
69 * (128 chunks, physical 0x00200000-0x009fffff).
71 * If you want to use (= allocate) portions of this RAM, you should clear
72 * the corresponding bits.
76 * - SCSI DMA bounce buffers
78 * FIXME: use the normal resource management
81 DECLARE_BITMAP(zorro_unused_z2ram, 128);
82 EXPORT_SYMBOL(zorro_unused_z2ram);
85 static void __init mark_region(unsigned long start, unsigned long end,
89 start += Z2RAM_CHUNKMASK;
91 end += Z2RAM_CHUNKMASK;
92 start &= ~Z2RAM_CHUNKMASK;
93 end &= ~Z2RAM_CHUNKMASK;
95 if (end <= Z2RAM_START || start >= Z2RAM_END)
97 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START;
98 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START;
100 u32 chunk = start>>Z2RAM_CHUNKSHIFT;
102 set_bit(chunk, zorro_unused_z2ram);
104 clear_bit(chunk, zorro_unused_z2ram);
105 start += Z2RAM_CHUNKSIZE;
110 static struct resource __init *zorro_find_parent_resource(
111 struct platform_device *bridge, struct zorro_dev *z)
115 for (i = 0; i < bridge->num_resources; i++) {
116 struct resource *r = &bridge->resource[i];
117 if (zorro_resource_start(z) >= r->start &&
118 zorro_resource_end(z) <= r->end)
121 return &iomem_resource;
126 static int __init amiga_zorro_probe(struct platform_device *pdev)
128 struct zorro_bus *bus;
134 /* Initialize the Zorro bus */
135 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
139 INIT_LIST_HEAD(&bus->devices);
140 bus->dev.parent = &pdev->dev;
141 dev_set_name(&bus->dev, "zorro");
142 error = device_register(&bus->dev);
144 pr_err("Zorro: Error registering zorro_bus\n");
145 put_device(&bus->dev);
149 platform_set_drvdata(pdev, bus);
151 pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n",
152 zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
154 /* First identify all devices ... */
155 for (i = 0; i < zorro_num_autocon; i++) {
156 z = &zorro_autocon[i];
157 z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8);
158 if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
160 unsigned long magic = zorro_resource_start(z)+0x8000;
161 z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
163 sprintf(z->name, "Zorro device %08x", z->id);
164 zorro_name_device(z);
165 z->resource.name = z->name;
166 r = zorro_find_parent_resource(pdev, z);
167 error = request_resource(r, &z->resource);
170 "Address space collision on device %s %pR\n",
171 z->name, &z->resource);
172 dev_set_name(&z->dev, "%02x", i);
173 z->dev.parent = &bus->dev;
174 z->dev.bus = &zorro_bus_type;
177 /* ... then register them */
178 for (i = 0; i < zorro_num_autocon; i++) {
179 z = &zorro_autocon[i];
180 error = device_register(&z->dev);
182 dev_err(&bus->dev, "Error registering device %s\n",
187 error = zorro_create_sysfs_dev_files(z);
189 dev_err(&z->dev, "Error creating sysfs files\n");
192 /* Mark all available Zorro II memory */
193 zorro_for_each_dev(z) {
194 if (z->rom.er_Type & ERTF_MEMLIST)
195 mark_region(zorro_resource_start(z),
196 zorro_resource_end(z)+1, 1);
199 /* Unmark all used Zorro II memory */
200 for (i = 0; i < m68k_num_memory; i++)
201 if (m68k_memory[i].addr < 16*1024*1024)
202 mark_region(m68k_memory[i].addr,
203 m68k_memory[i].addr+m68k_memory[i].size,
209 static struct platform_driver amiga_zorro_driver = {
211 .name = "amiga-zorro",
212 .owner = THIS_MODULE,
216 static int __init amiga_zorro_init(void)
218 return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe);
221 module_init(amiga_zorro_init);
223 MODULE_LICENSE("GPL");