1 /* 2 * $Id: zorro.c,v 1.1.2.1 1998/06/07 23:21:02 geert Exp $ 3 * 4 * Zorro Bus Services 5 * 6 * Copyright (C) 1995-2003 Geert Uytterhoeven 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file COPYING in the main directory of this archive 10 * for more details. 11 */ 12 13 #include <linux/module.h> 14 #include <linux/types.h> 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/zorro.h> 18 #include <linux/bitops.h> 19 #include <linux/string.h> 20 21 #include <asm/setup.h> 22 #include <asm/amigahw.h> 23 24 #include "zorro.h" 25 26 27 /* 28 * Zorro Expansion Devices 29 */ 30 31 u_int zorro_num_autocon = 0; 32 struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO]; 33 34 35 /* 36 * Single Zorro bus 37 */ 38 39 struct zorro_bus zorro_bus = {\ 40 .resources = { 41 /* Zorro II regions (on Zorro II/III) */ 42 { .name = "Zorro II exp", .start = 0x00e80000, .end = 0x00efffff }, 43 { .name = "Zorro II mem", .start = 0x00200000, .end = 0x009fffff }, 44 /* Zorro III regions (on Zorro III only) */ 45 { .name = "Zorro III exp", .start = 0xff000000, .end = 0xffffffff }, 46 { .name = "Zorro III cfg", .start = 0x40000000, .end = 0x7fffffff } 47 }, 48 .name = "Zorro bus" 49 }; 50 51 52 /* 53 * Find Zorro Devices 54 */ 55 56 struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) 57 { 58 struct zorro_dev *z; 59 60 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) 61 return NULL; 62 63 for (z = from ? from+1 : &zorro_autocon[0]; 64 z < zorro_autocon+zorro_num_autocon; 65 z++) 66 if (id == ZORRO_WILDCARD || id == z->id) 67 return z; 68 return NULL; 69 } 70 71 72 /* 73 * Bitmask indicating portions of available Zorro II RAM that are unused 74 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB 75 * (128 chunks, physical 0x00200000-0x009fffff). 76 * 77 * If you want to use (= allocate) portions of this RAM, you should clear 78 * the corresponding bits. 79 * 80 * Possible uses: 81 * - z2ram device 82 * - SCSI DMA bounce buffers 83 * 84 * FIXME: use the normal resource management 85 */ 86 87 DECLARE_BITMAP(zorro_unused_z2ram, 128); 88 89 90 static void __init mark_region(unsigned long start, unsigned long end, 91 int flag) 92 { 93 if (flag) 94 start += Z2RAM_CHUNKMASK; 95 else 96 end += Z2RAM_CHUNKMASK; 97 start &= ~Z2RAM_CHUNKMASK; 98 end &= ~Z2RAM_CHUNKMASK; 99 100 if (end <= Z2RAM_START || start >= Z2RAM_END) 101 return; 102 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START; 103 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START; 104 while (start < end) { 105 u32 chunk = start>>Z2RAM_CHUNKSHIFT; 106 if (flag) 107 set_bit(chunk, zorro_unused_z2ram); 108 else 109 clear_bit(chunk, zorro_unused_z2ram); 110 start += Z2RAM_CHUNKSIZE; 111 } 112 } 113 114 115 static struct resource __init *zorro_find_parent_resource(struct zorro_dev *z) 116 { 117 int i; 118 119 for (i = 0; i < zorro_bus.num_resources; i++) 120 if (zorro_resource_start(z) >= zorro_bus.resources[i].start && 121 zorro_resource_end(z) <= zorro_bus.resources[i].end) 122 return &zorro_bus.resources[i]; 123 return &iomem_resource; 124 } 125 126 127 /* 128 * Initialization 129 */ 130 131 static int __init zorro_init(void) 132 { 133 struct zorro_dev *z; 134 unsigned int i; 135 136 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) 137 return 0; 138 139 pr_info("Zorro: Probing AutoConfig expansion devices: %d device%s\n", 140 zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s"); 141 142 /* Initialize the Zorro bus */ 143 INIT_LIST_HEAD(&zorro_bus.devices); 144 strcpy(zorro_bus.dev.bus_id, "zorro"); 145 device_register(&zorro_bus.dev); 146 147 /* Request the resources */ 148 zorro_bus.num_resources = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2; 149 for (i = 0; i < zorro_bus.num_resources; i++) 150 request_resource(&iomem_resource, &zorro_bus.resources[i]); 151 152 /* Register all devices */ 153 for (i = 0; i < zorro_num_autocon; i++) { 154 z = &zorro_autocon[i]; 155 z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8); 156 if (z->id == ZORRO_PROD_GVP_EPC_BASE) { 157 /* GVP quirk */ 158 unsigned long magic = zorro_resource_start(z)+0x8000; 159 z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK; 160 } 161 sprintf(z->name, "Zorro device %08x", z->id); 162 zorro_name_device(z); 163 z->resource.name = z->name; 164 if (request_resource(zorro_find_parent_resource(z), &z->resource)) 165 printk(KERN_ERR "Zorro: Address space collision on device %s " 166 "[%lx:%lx]\n", 167 z->name, (unsigned long)zorro_resource_start(z), 168 (unsigned long)zorro_resource_end(z)); 169 sprintf(z->dev.bus_id, "%02x", i); 170 z->dev.parent = &zorro_bus.dev; 171 z->dev.bus = &zorro_bus_type; 172 device_register(&z->dev); 173 zorro_create_sysfs_dev_files(z); 174 } 175 176 /* Mark all available Zorro II memory */ 177 zorro_for_each_dev(z) { 178 if (z->rom.er_Type & ERTF_MEMLIST) 179 mark_region(zorro_resource_start(z), zorro_resource_end(z)+1, 1); 180 } 181 182 /* Unmark all used Zorro II memory */ 183 for (i = 0; i < m68k_num_memory; i++) 184 if (m68k_memory[i].addr < 16*1024*1024) 185 mark_region(m68k_memory[i].addr, 186 m68k_memory[i].addr+m68k_memory[i].size, 0); 187 188 return 0; 189 } 190 191 subsys_initcall(zorro_init); 192 193 EXPORT_SYMBOL(zorro_find_device); 194 EXPORT_SYMBOL(zorro_unused_z2ram); 195 196 MODULE_LICENSE("GPL"); 197