/* * 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; 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); strcpy(zorro_bus.dev.bus_id, "zorro"); device_register(&zorro_bus.dev); /* 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)) printk(KERN_ERR "Zorro: Address space collision on device %s " "[%lx:%lx]\n", z->name, (unsigned long)zorro_resource_start(z), (unsigned long)zorro_resource_end(z)); sprintf(z->dev.bus_id, "%02x", i); z->dev.parent = &zorro_bus.dev; z->dev.bus = &zorro_bus_type; device_register(&z->dev); zorro_create_sysfs_dev_files(z); } /* 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");