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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/zorro/zorro.c
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>
19 #include <asm/setup.h>
20 #include <asm/amigahw.h>
26 * Zorro Expansion Devices
29 u_int zorro_num_autocon
= 0;
30 struct zorro_dev zorro_autocon
[ZORRO_NUM_AUTO
];
37 struct zorro_bus zorro_bus
= {\
39 /* Zorro II regions (on Zorro II/III) */
40 { .name
= "Zorro II exp", .start
= 0x00e80000, .end
= 0x00efffff },
41 { .name
= "Zorro II mem", .start
= 0x00200000, .end
= 0x009fffff },
42 /* Zorro III regions (on Zorro III only) */
43 { .name
= "Zorro III exp", .start
= 0xff000000, .end
= 0xffffffff },
44 { .name
= "Zorro III cfg", .start
= 0x40000000, .end
= 0x7fffffff }
54 struct zorro_dev
*zorro_find_device(zorro_id id
, struct zorro_dev
*from
)
58 if (!MACH_IS_AMIGA
|| !AMIGAHW_PRESENT(ZORRO
))
61 for (z
= from
? from
+1 : &zorro_autocon
[0];
62 z
< zorro_autocon
+zorro_num_autocon
;
64 if (id
== ZORRO_WILDCARD
|| id
== z
->id
)
71 * Bitmask indicating portions of available Zorro II RAM that are unused
72 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB
73 * (128 chunks, physical 0x00200000-0x009fffff).
75 * If you want to use (= allocate) portions of this RAM, you should clear
76 * the corresponding bits.
80 * - SCSI DMA bounce buffers
82 * FIXME: use the normal resource management
85 DECLARE_BITMAP(zorro_unused_z2ram
, 128);
88 static void __init
mark_region(unsigned long start
, unsigned long end
,
92 start
+= Z2RAM_CHUNKMASK
;
94 end
+= Z2RAM_CHUNKMASK
;
95 start
&= ~Z2RAM_CHUNKMASK
;
96 end
&= ~Z2RAM_CHUNKMASK
;
98 if (end
<= Z2RAM_START
|| start
>= Z2RAM_END
)
100 start
= start
< Z2RAM_START
? 0x00000000 : start
-Z2RAM_START
;
101 end
= end
> Z2RAM_END
? Z2RAM_SIZE
: end
-Z2RAM_START
;
102 while (start
< end
) {
103 u32 chunk
= start
>>Z2RAM_CHUNKSHIFT
;
105 set_bit(chunk
, zorro_unused_z2ram
);
107 clear_bit(chunk
, zorro_unused_z2ram
);
108 start
+= Z2RAM_CHUNKSIZE
;
113 static struct resource __init
*zorro_find_parent_resource(struct zorro_dev
*z
)
117 for (i
= 0; i
< zorro_bus
.num_resources
; i
++)
118 if (zorro_resource_start(z
) >= zorro_bus
.resources
[i
].start
&&
119 zorro_resource_end(z
) <= zorro_bus
.resources
[i
].end
)
120 return &zorro_bus
.resources
[i
];
121 return &iomem_resource
;
129 static int __init
zorro_init(void)
134 if (!MACH_IS_AMIGA
|| !AMIGAHW_PRESENT(ZORRO
))
137 pr_info("Zorro: Probing AutoConfig expansion devices: %d device%s\n",
138 zorro_num_autocon
, zorro_num_autocon
== 1 ? "" : "s");
140 /* Initialize the Zorro bus */
141 INIT_LIST_HEAD(&zorro_bus
.devices
);
142 strcpy(zorro_bus
.dev
.bus_id
, "zorro");
143 device_register(&zorro_bus
.dev
);
145 /* Request the resources */
146 zorro_bus
.num_resources
= AMIGAHW_PRESENT(ZORRO3
) ? 4 : 2;
147 for (i
= 0; i
< zorro_bus
.num_resources
; i
++)
148 request_resource(&iomem_resource
, &zorro_bus
.resources
[i
]);
150 /* Register all devices */
151 for (i
= 0; i
< zorro_num_autocon
; i
++) {
152 z
= &zorro_autocon
[i
];
153 z
->id
= (z
->rom
.er_Manufacturer
<<16) | (z
->rom
.er_Product
<<8);
154 if (z
->id
== ZORRO_PROD_GVP_EPC_BASE
) {
156 unsigned long magic
= zorro_resource_start(z
)+0x8000;
157 z
->id
|= *(u16
*)ZTWO_VADDR(magic
) & GVP_PRODMASK
;
159 sprintf(z
->name
, "Zorro device %08x", z
->id
);
160 zorro_name_device(z
);
161 z
->resource
.name
= z
->name
;
162 if (request_resource(zorro_find_parent_resource(z
), &z
->resource
))
163 printk(KERN_ERR
"Zorro: Address space collision on device %s "
165 z
->name
, (unsigned long)zorro_resource_start(z
),
166 (unsigned long)zorro_resource_end(z
));
167 sprintf(z
->dev
.bus_id
, "%02x", i
);
168 z
->dev
.parent
= &zorro_bus
.dev
;
169 z
->dev
.bus
= &zorro_bus_type
;
170 device_register(&z
->dev
);
171 zorro_create_sysfs_dev_files(z
);
174 /* Mark all available Zorro II memory */
175 zorro_for_each_dev(z
) {
176 if (z
->rom
.er_Type
& ERTF_MEMLIST
)
177 mark_region(zorro_resource_start(z
), zorro_resource_end(z
)+1, 1);
180 /* Unmark all used Zorro II memory */
181 for (i
= 0; i
< m68k_num_memory
; i
++)
182 if (m68k_memory
[i
].addr
< 16*1024*1024)
183 mark_region(m68k_memory
[i
].addr
,
184 m68k_memory
[i
].addr
+m68k_memory
[i
].size
, 0);
189 subsys_initcall(zorro_init
);
191 EXPORT_SYMBOL(zorro_find_device
);
192 EXPORT_SYMBOL(zorro_unused_z2ram
);
194 MODULE_LICENSE("GPL");