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
32unsigned int zorro_num_autocon;
33struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata;
34struct zorro_dev *zorro_autocon;
35
36
37    /*
38     *  Zorro bus
39     */
40
41struct zorro_bus {
42	struct device dev;
43	struct zorro_dev devices[0];
44};
45
46
47    /*
48     *  Find Zorro Devices
49     */
50
51struct 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}
65EXPORT_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
83DECLARE_BITMAP(zorro_unused_z2ram, 128);
84EXPORT_SYMBOL(zorro_unused_z2ram);
85
86
87static 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
112static 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
128static 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
222static struct platform_driver amiga_zorro_driver = {
223	.driver   = {
224		.name	= "amiga-zorro",
225	},
226};
227
228static int __init amiga_zorro_init(void)
229{
230	return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe);
231}
232
233module_init(amiga_zorro_init);
234
235MODULE_LICENSE("GPL");
236