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