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/*
* Zorro Bus Services
*
* Copyright (C) 1995-2003 Geert Uytterhoeven
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/zorro.h>
#include <linux/bitops.h>
#include <linux/string.h>
#include <asm/setup.h>
#include <asm/amigahw.h>
#include "zorro.h"
/*
* Zorro Expansion Devices
*/
u_int zorro_num_autocon = 0;
struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];
/*
* Single Zorro bus
*/
struct zorro_bus zorro_bus = {\
.resources = {
/* Zorro II regions (on Zorro II/III) */
{ .name = "Zorro II exp", .start = 0x00e80000, .end = 0x00efffff },
{ .name = "Zorro II mem", .start = 0x00200000, .end = 0x009fffff },
/* Zorro III regions (on Zorro III only) */
{ .name = "Zorro III exp", .start = 0xff000000, .end = 0xffffffff },
{ .name = "Zorro III cfg", .start = 0x40000000, .end = 0x7fffffff }
},
.name = "Zorro bus"
};
/*
* Find Zorro Devices
*/
struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)
{
struct zorro_dev *z;
if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))
return NULL;
for (z = from ? from+1 : &zorro_autocon[0];
z < zorro_autocon+zorro_num_autocon;
z++)
if (id == ZORRO_WILDCARD || id == z->id)
return z;
return NULL;
}
/*
* Bitmask indicating portions of available Zorro II RAM that are unused
* by the system. Every bit represents a 64K chunk, for a maximum of 8MB
* (128 chunks, physical 0x00200000-0x009fffff).
*
* If you want to use (= allocate) portions of this RAM, you should clear
* the corresponding bits.
*
* Possible uses:
* - z2ram device
* - SCSI DMA bounce buffers
*
* FIXME: use the normal resource management
*/
DECLARE_BITMAP(zorro_unused_z2ram, 128);
static void __init mark_region(unsigned long start, unsigned long end,
int flag)
{
if (flag)
start += Z2RAM_CHUNKMASK;
else
end += Z2RAM_CHUNKMASK;
start &= ~Z2RAM_CHUNKMASK;
end &= ~Z2RAM_CHUNKMASK;
if (end <= Z2RAM_START || start >= Z2RAM_END)
return;
start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START;
end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START;
while (start < end) {
u32 chunk = start>>Z2RAM_CHUNKSHIFT;
if (flag)
set_bit(chunk, zorro_unused_z2ram);
else
clear_bit(chunk, zorro_unused_z2ram);
start += Z2RAM_CHUNKSIZE;
}
}
static struct resource __init *zorro_find_parent_resource(struct zorro_dev *z)
{
int i;
for (i = 0; i < zorro_bus.num_resources; i++)
if (zorro_resource_start(z) >= zorro_bus.resources[i].start &&
zorro_resource_end(z) <= zorro_bus.resources[i].end)
return &zorro_bus.resources[i];
return &iomem_resource;
}
/*
* Initialization
*/
static int __init zorro_init(void)
{
struct zorro_dev *z;
unsigned int i;
int error;
if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))
return 0;
pr_info("Zorro: Probing AutoConfig expansion devices: %d device%s\n",
zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
/* Initialize the Zorro bus */
INIT_LIST_HEAD(&zorro_bus.devices);
dev_set_name(&zorro_bus.dev, "zorro");
error = device_register(&zorro_bus.dev);
if (error) {
pr_err("Zorro: Error registering zorro_bus\n");
return error;
}
/* Request the resources */
zorro_bus.num_resources = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2;
for (i = 0; i < zorro_bus.num_resources; i++)
request_resource(&iomem_resource, &zorro_bus.resources[i]);
/* Register all devices */
for (i = 0; i < zorro_num_autocon; i++) {
z = &zorro_autocon[i];
z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8);
if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
/* GVP quirk */
unsigned long magic = zorro_resource_start(z)+0x8000;
z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
}
sprintf(z->name, "Zorro device %08x", z->id);
zorro_name_device(z);
z->resource.name = z->name;
if (request_resource(zorro_find_parent_resource(z), &z->resource))
pr_err("Zorro: Address space collision on device %s %pR\n",
z->name, &z->resource);
dev_set_name(&z->dev, "%02x", i);
z->dev.parent = &zorro_bus.dev;
z->dev.bus = &zorro_bus_type;
error = device_register(&z->dev);
if (error) {
pr_err("Zorro: Error registering device %s\n", z->name);
continue;
}
error = zorro_create_sysfs_dev_files(z);
if (error)
dev_err(&z->dev, "Error creating sysfs files\n");
}
/* Mark all available Zorro II memory */
zorro_for_each_dev(z) {
if (z->rom.er_Type & ERTF_MEMLIST)
mark_region(zorro_resource_start(z), zorro_resource_end(z)+1, 1);
}
/* Unmark all used Zorro II memory */
for (i = 0; i < m68k_num_memory; i++)
if (m68k_memory[i].addr < 16*1024*1024)
mark_region(m68k_memory[i].addr,
m68k_memory[i].addr+m68k_memory[i].size, 0);
return 0;
}
subsys_initcall(zorro_init);
EXPORT_SYMBOL(zorro_find_device);
EXPORT_SYMBOL(zorro_unused_z2ram);
MODULE_LICENSE("GPL");
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