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