blob: 6455f3a244c594334b04f6c6ac46c2bf527fd1f0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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>
Tim Schmielau4e57b682005-10-30 15:03:48 -080017#include <linux/string.h>
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020018#include <linux/platform_device.h>
19#include <linux/slab.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080020
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <asm/setup.h>
22#include <asm/amigahw.h>
23
24#include "zorro.h"
25
26
27 /*
28 * Zorro Expansion Devices
29 */
30
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020031unsigned int zorro_num_autocon;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];
33
34
35 /*
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020036 * Zorro bus
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 */
38
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020039struct zorro_bus {
40 struct list_head devices; /* list of devices on this bus */
41 struct device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042};
43
44
45 /*
46 * Find Zorro Devices
47 */
48
49struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)
50{
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020051 struct zorro_dev *z;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020053 if (!zorro_num_autocon)
54 return NULL;
55
56 for (z = from ? from+1 : &zorro_autocon[0];
57 z < zorro_autocon+zorro_num_autocon;
58 z++)
59 if (id == ZORRO_WILDCARD || id == z->id)
60 return z;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062}
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020063EXPORT_SYMBOL(zorro_find_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65
66 /*
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).
70 *
71 * If you want to use (= allocate) portions of this RAM, you should clear
72 * the corresponding bits.
73 *
74 * Possible uses:
75 * - z2ram device
76 * - SCSI DMA bounce buffers
77 *
78 * FIXME: use the normal resource management
79 */
80
81DECLARE_BITMAP(zorro_unused_z2ram, 128);
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020082EXPORT_SYMBOL(zorro_unused_z2ram);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84
85static void __init mark_region(unsigned long start, unsigned long end,
86 int flag)
87{
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 if (flag)
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020089 start += Z2RAM_CHUNKMASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 else
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020091 end += Z2RAM_CHUNKMASK;
92 start &= ~Z2RAM_CHUNKMASK;
93 end &= ~Z2RAM_CHUNKMASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Geert Uytterhoeven0d305462009-04-05 12:40:41 +020095 if (end <= Z2RAM_START || start >= Z2RAM_END)
96 return;
97 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START;
98 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START;
99 while (start < end) {
100 u32 chunk = start>>Z2RAM_CHUNKSHIFT;
101 if (flag)
102 set_bit(chunk, zorro_unused_z2ram);
103 else
104 clear_bit(chunk, zorro_unused_z2ram);
105 start += Z2RAM_CHUNKSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 }
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200107}
108
109
110static struct resource __init *zorro_find_parent_resource(
111 struct platform_device *bridge, struct zorro_dev *z)
112{
113 int i;
114
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)
119 return r;
120 }
121 return &iomem_resource;
122}
123
124
125
126static int __init amiga_zorro_probe(struct platform_device *pdev)
127{
128 struct zorro_bus *bus;
129 struct zorro_dev *z;
130 struct resource *r;
131 unsigned int i;
132 int error;
133
134 /* Initialize the Zorro bus */
135 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
136 if (!bus)
137 return -ENOMEM;
138
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);
Geert Uytterhoeven11a8b2c2008-12-30 14:21:19 +0100143 if (error) {
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200144 pr_err("Zorro: Error registering zorro_bus\n");
145 kfree(bus);
146 return error;
Geert Uytterhoeven11a8b2c2008-12-30 14:21:19 +0100147 }
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200148 platform_set_drvdata(pdev, bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200150 /* Register all devices */
151 pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n",
152 zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200154 for (i = 0; i < zorro_num_autocon; i++) {
155 z = &zorro_autocon[i];
156 z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8);
157 if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
158 /* GVP quirk */
159 unsigned long magic = zorro_resource_start(z)+0x8000;
160 z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
161 }
162 sprintf(z->name, "Zorro device %08x", z->id);
163 zorro_name_device(z);
164 z->resource.name = z->name;
165 r = zorro_find_parent_resource(pdev, z);
166 error = request_resource(r, &z->resource);
167 if (error)
168 dev_err(&bus->dev,
169 "Address space collision on device %s %pR\n",
170 z->name, &z->resource);
171 dev_set_name(&z->dev, "%02x", i);
172 z->dev.parent = &bus->dev;
173 z->dev.bus = &zorro_bus_type;
174 error = device_register(&z->dev);
175 if (error) {
176 dev_err(&bus->dev, "Error registering device %s\n",
177 z->name);
178 continue;
179 }
180 error = zorro_create_sysfs_dev_files(z);
181 if (error)
182 dev_err(&z->dev, "Error creating sysfs files\n");
183 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200185 /* Mark all available Zorro II memory */
186 zorro_for_each_dev(z) {
187 if (z->rom.er_Type & ERTF_MEMLIST)
188 mark_region(zorro_resource_start(z),
189 zorro_resource_end(z)+1, 1);
190 }
191
192 /* Unmark all used Zorro II memory */
193 for (i = 0; i < m68k_num_memory; i++)
194 if (m68k_memory[i].addr < 16*1024*1024)
195 mark_region(m68k_memory[i].addr,
196 m68k_memory[i].addr+m68k_memory[i].size,
197 0);
198
199 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200}
201
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200202static struct platform_driver amiga_zorro_driver = {
203 .driver = {
204 .name = "amiga-zorro",
205 .owner = THIS_MODULE,
206 },
207};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Geert Uytterhoeven0d305462009-04-05 12:40:41 +0200209static int __init amiga_zorro_init(void)
210{
211 return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe);
212}
213
214module_init(amiga_zorro_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216MODULE_LICENSE("GPL");