/* * $Id: zorro.c,v 1.1.2.1 1998/06/07 23:21:02 geert Exp $ * * Zorro Bus Services * * Copyright (C) 1995-2000 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 #include #include #include #include #include #include #include /* * Zorro Expansion Devices */ u_int zorro_num_autocon = 0; struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO]; /* * Zorro Bus Resources * Order _does_ matter! (see code below) */ static struct resource zorro_res[4] = { /* Zorro II regions (on Zorro II/III) */ { "Zorro II exp", 0x00e80000, 0x00efffff }, { "Zorro II mem", 0x00200000, 0x009fffff }, /* Zorro III regions (on Zorro III only) */ { "Zorro III exp", 0xff000000, 0xffffffff }, { "Zorro III cfg", 0x40000000, 0x7fffffff } }; static u_int zorro_num_res __initdata = 0; /* * Find Zorro Devices */ struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) { struct zorro_dev *dev; if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) return NULL; for (dev = from ? from+1 : &zorro_autocon[0]; dev < zorro_autocon+zorro_num_autocon; dev++) if (id == ZORRO_WILDCARD || id == dev->id) return dev; 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 */ u32 zorro_unused_z2ram[4] = { 0, 0, 0, 0 }; 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_num_res; i++) if (z->resource.start >= zorro_res[i].start && z->resource.end <= zorro_res[i].end) return &zorro_res[i]; return &iomem_resource; } /* * Initialization */ void __init zorro_init(void) { struct zorro_dev *dev; u_int i; if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) return; printk("Zorro: Probing AutoConfig expansion devices: %d device%s\n", zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s"); /* Request the resources */ zorro_num_res = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2; for (i = 0; i < zorro_num_res; i++) request_resource(&iomem_resource, &zorro_res[i]); for (i = 0; i < zorro_num_autocon; i++) { dev = &zorro_autocon[i]; dev->id = (dev->rom.er_Manufacturer<<16) | (dev->rom.er_Product<<8); if (dev->id == ZORRO_PROD_GVP_EPC_BASE) { /* GVP quirk */ unsigned long magic = dev->resource.start+0x8000; dev->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK; } sprintf(dev->name, "Zorro device %08x", dev->id); zorro_name_device(dev); dev->resource.name = dev->name; if (request_resource(zorro_find_parent_resource(dev), &dev->resource)) printk(KERN_ERR "Zorro: Address space collision on device %s " "[%lx:%lx]\n", dev->name, dev->resource.start, dev->resource.end); } /* Mark all available Zorro II memory */ for (i = 0; i < zorro_num_autocon; i++) { dev = &zorro_autocon[i]; if (dev->rom.er_Type & ERTF_MEMLIST) mark_region(dev->resource.start, dev->resource.end+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); } EXPORT_SYMBOL(zorro_find_device); EXPORT_SYMBOL(zorro_unused_z2ram);