]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/zorro/zorro.c
2 * $Id: zorro.c,v 1.1.2.1 1998/06/07 23:21:02 geert Exp $
6 * Copyright (C) 1995-2003 Geert Uytterhoeven
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/zorro.h>
18 #include <linux/bitops.h>
19 #include <linux/string.h>
21 #include <asm/setup.h>
22 #include <asm/amigahw.h>
28 * Zorro Expansion Devices
31 u_int zorro_num_autocon
= 0;
32 struct zorro_dev zorro_autocon
[ZORRO_NUM_AUTO
];
39 struct zorro_bus zorro_bus
= {\
41 /* Zorro II regions (on Zorro II/III) */
42 { .name
= "Zorro II exp", .start
= 0x00e80000, .end
= 0x00efffff },
43 { .name
= "Zorro II mem", .start
= 0x00200000, .end
= 0x009fffff },
44 /* Zorro III regions (on Zorro III only) */
45 { .name
= "Zorro III exp", .start
= 0xff000000, .end
= 0xffffffff },
46 { .name
= "Zorro III cfg", .start
= 0x40000000, .end
= 0x7fffffff }
56 struct zorro_dev
*zorro_find_device(zorro_id id
, struct zorro_dev
*from
)
60 if (!MACH_IS_AMIGA
|| !AMIGAHW_PRESENT(ZORRO
))
63 for (z
= from
? from
+1 : &zorro_autocon
[0];
64 z
< zorro_autocon
+zorro_num_autocon
;
66 if (id
== ZORRO_WILDCARD
|| id
== z
->id
)
73 * Bitmask indicating portions of available Zorro II RAM that are unused
74 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB
75 * (128 chunks, physical 0x00200000-0x009fffff).
77 * If you want to use (= allocate) portions of this RAM, you should clear
78 * the corresponding bits.
82 * - SCSI DMA bounce buffers
84 * FIXME: use the normal resource management
87 DECLARE_BITMAP(zorro_unused_z2ram
, 128);
90 static void __init
mark_region(unsigned long start
, unsigned long end
,
94 start
+= Z2RAM_CHUNKMASK
;
96 end
+= Z2RAM_CHUNKMASK
;
97 start
&= ~Z2RAM_CHUNKMASK
;
98 end
&= ~Z2RAM_CHUNKMASK
;
100 if (end
<= Z2RAM_START
|| start
>= Z2RAM_END
)
102 start
= start
< Z2RAM_START
? 0x00000000 : start
-Z2RAM_START
;
103 end
= end
> Z2RAM_END
? Z2RAM_SIZE
: end
-Z2RAM_START
;
104 while (start
< end
) {
105 u32 chunk
= start
>>Z2RAM_CHUNKSHIFT
;
107 set_bit(chunk
, zorro_unused_z2ram
);
109 clear_bit(chunk
, zorro_unused_z2ram
);
110 start
+= Z2RAM_CHUNKSIZE
;
115 static struct resource __init
*zorro_find_parent_resource(struct zorro_dev
*z
)
119 for (i
= 0; i
< zorro_bus
.num_resources
; i
++)
120 if (zorro_resource_start(z
) >= zorro_bus
.resources
[i
].start
&&
121 zorro_resource_end(z
) <= zorro_bus
.resources
[i
].end
)
122 return &zorro_bus
.resources
[i
];
123 return &iomem_resource
;
131 static int __init
zorro_init(void)
136 if (!MACH_IS_AMIGA
|| !AMIGAHW_PRESENT(ZORRO
))
139 pr_info("Zorro: Probing AutoConfig expansion devices: %d device%s\n",
140 zorro_num_autocon
, zorro_num_autocon
== 1 ? "" : "s");
142 /* Initialize the Zorro bus */
143 INIT_LIST_HEAD(&zorro_bus
.devices
);
144 strcpy(zorro_bus
.dev
.bus_id
, "zorro");
145 device_register(&zorro_bus
.dev
);
147 /* Request the resources */
148 zorro_bus
.num_resources
= AMIGAHW_PRESENT(ZORRO3
) ? 4 : 2;
149 for (i
= 0; i
< zorro_bus
.num_resources
; i
++)
150 request_resource(&iomem_resource
, &zorro_bus
.resources
[i
]);
152 /* Register all devices */
153 for (i
= 0; i
< zorro_num_autocon
; i
++) {
154 z
= &zorro_autocon
[i
];
155 z
->id
= (z
->rom
.er_Manufacturer
<<16) | (z
->rom
.er_Product
<<8);
156 if (z
->id
== ZORRO_PROD_GVP_EPC_BASE
) {
158 unsigned long magic
= zorro_resource_start(z
)+0x8000;
159 z
->id
|= *(u16
*)ZTWO_VADDR(magic
) & GVP_PRODMASK
;
161 sprintf(z
->name
, "Zorro device %08x", z
->id
);
162 zorro_name_device(z
);
163 z
->resource
.name
= z
->name
;
164 if (request_resource(zorro_find_parent_resource(z
), &z
->resource
))
165 printk(KERN_ERR
"Zorro: Address space collision on device %s "
167 z
->name
, (unsigned long)zorro_resource_start(z
),
168 (unsigned long)zorro_resource_end(z
));
169 sprintf(z
->dev
.bus_id
, "%02x", i
);
170 z
->dev
.parent
= &zorro_bus
.dev
;
171 z
->dev
.bus
= &zorro_bus_type
;
172 device_register(&z
->dev
);
173 zorro_create_sysfs_dev_files(z
);
176 /* Mark all available Zorro II memory */
177 zorro_for_each_dev(z
) {
178 if (z
->rom
.er_Type
& ERTF_MEMLIST
)
179 mark_region(zorro_resource_start(z
), zorro_resource_end(z
)+1, 1);
182 /* Unmark all used Zorro II memory */
183 for (i
= 0; i
< m68k_num_memory
; i
++)
184 if (m68k_memory
[i
].addr
< 16*1024*1024)
185 mark_region(m68k_memory
[i
].addr
,
186 m68k_memory
[i
].addr
+m68k_memory
[i
].size
, 0);
191 subsys_initcall(zorro_init
);
193 EXPORT_SYMBOL(zorro_find_device
);
194 EXPORT_SYMBOL(zorro_unused_z2ram
);
196 MODULE_LICENSE("GPL");