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 #include <linux/platform_device.h> 19 #include <linux/slab.h> 20 21 #include <asm/byteorder.h> 22 #include <asm/setup.h> 23 #include <asm/amigahw.h> 24 25 #include "zorro.h" 26 27 28 /* 29 * Zorro Expansion Devices 30 */ 31 32 unsigned int zorro_num_autocon; 33 struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata; 34 struct zorro_dev *zorro_autocon; 35 36 37 /* 38 * Zorro bus 39 */ 40 41 struct zorro_bus { 42 struct device dev; 43 struct zorro_dev devices[0]; 44 }; 45 46 47 /* 48 * Find Zorro Devices 49 */ 50 51 struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) 52 { 53 struct zorro_dev *z; 54 55 if (!zorro_num_autocon) 56 return NULL; 57 58 for (z = from ? from+1 : &zorro_autocon[0]; 59 z < zorro_autocon+zorro_num_autocon; 60 z++) 61 if (id == ZORRO_WILDCARD || id == z->id) 62 return z; 63 return NULL; 64 } 65 EXPORT_SYMBOL(zorro_find_device); 66 67 68 /* 69 * Bitmask indicating portions of available Zorro II RAM that are unused 70 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB 71 * (128 chunks, physical 0x00200000-0x009fffff). 72 * 73 * If you want to use (= allocate) portions of this RAM, you should clear 74 * the corresponding bits. 75 * 76 * Possible uses: 77 * - z2ram device 78 * - SCSI DMA bounce buffers 79 * 80 * FIXME: use the normal resource management 81 */ 82 83 DECLARE_BITMAP(zorro_unused_z2ram, 128); 84 EXPORT_SYMBOL(zorro_unused_z2ram); 85 86 87 static void __init mark_region(unsigned long start, unsigned long end, 88 int flag) 89 { 90 if (flag) 91 start += Z2RAM_CHUNKMASK; 92 else 93 end += Z2RAM_CHUNKMASK; 94 start &= ~Z2RAM_CHUNKMASK; 95 end &= ~Z2RAM_CHUNKMASK; 96 97 if (end <= Z2RAM_START || start >= Z2RAM_END) 98 return; 99 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START; 100 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START; 101 while (start < end) { 102 u32 chunk = start>>Z2RAM_CHUNKSHIFT; 103 if (flag) 104 set_bit(chunk, zorro_unused_z2ram); 105 else 106 clear_bit(chunk, zorro_unused_z2ram); 107 start += Z2RAM_CHUNKSIZE; 108 } 109 } 110 111 112 static struct resource __init *zorro_find_parent_resource( 113 struct platform_device *bridge, struct zorro_dev *z) 114 { 115 int i; 116 117 for (i = 0; i < bridge->num_resources; i++) { 118 struct resource *r = &bridge->resource[i]; 119 if (zorro_resource_start(z) >= r->start && 120 zorro_resource_end(z) <= r->end) 121 return r; 122 } 123 return &iomem_resource; 124 } 125 126 127 128 static int __init amiga_zorro_probe(struct platform_device *pdev) 129 { 130 struct zorro_bus *bus; 131 struct zorro_dev_init *zi; 132 struct zorro_dev *z; 133 struct resource *r; 134 unsigned int i; 135 int error; 136 137 /* Initialize the Zorro bus */ 138 bus = kzalloc(sizeof(*bus) + 139 zorro_num_autocon * sizeof(bus->devices[0]), 140 GFP_KERNEL); 141 if (!bus) 142 return -ENOMEM; 143 144 zorro_autocon = bus->devices; 145 bus->dev.parent = &pdev->dev; 146 dev_set_name(&bus->dev, zorro_bus_type.name); 147 error = device_register(&bus->dev); 148 if (error) { 149 pr_err("Zorro: Error registering zorro_bus\n"); 150 put_device(&bus->dev); 151 kfree(bus); 152 return error; 153 } 154 platform_set_drvdata(pdev, bus); 155 156 pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n", 157 zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s"); 158 159 /* First identify all devices ... */ 160 for (i = 0; i < zorro_num_autocon; i++) { 161 zi = &zorro_autocon_init[i]; 162 z = &zorro_autocon[i]; 163 164 z->rom = zi->rom; 165 z->id = (be16_to_cpu(z->rom.er_Manufacturer) << 16) | 166 (z->rom.er_Product << 8); 167 if (z->id == ZORRO_PROD_GVP_EPC_BASE) { 168 /* GVP quirk */ 169 unsigned long magic = zi->boardaddr + 0x8000; 170 z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK; 171 } 172 z->slotaddr = zi->slotaddr; 173 z->slotsize = zi->slotsize; 174 sprintf(z->name, "Zorro device %08x", z->id); 175 zorro_name_device(z); 176 z->resource.start = zi->boardaddr; 177 z->resource.end = zi->boardaddr + zi->boardsize - 1; 178 z->resource.name = z->name; 179 r = zorro_find_parent_resource(pdev, z); 180 error = request_resource(r, &z->resource); 181 if (error) 182 dev_err(&bus->dev, 183 "Address space collision on device %s %pR\n", 184 z->name, &z->resource); 185 z->dev.parent = &bus->dev; 186 z->dev.bus = &zorro_bus_type; 187 z->dev.id = i; 188 } 189 190 /* ... then register them */ 191 for (i = 0; i < zorro_num_autocon; i++) { 192 z = &zorro_autocon[i]; 193 error = device_register(&z->dev); 194 if (error) { 195 dev_err(&bus->dev, "Error registering device %s\n", 196 z->name); 197 put_device(&z->dev); 198 continue; 199 } 200 error = zorro_create_sysfs_dev_files(z); 201 if (error) 202 dev_err(&z->dev, "Error creating sysfs files\n"); 203 } 204 205 /* Mark all available Zorro II memory */ 206 zorro_for_each_dev(z) { 207 if (z->rom.er_Type & ERTF_MEMLIST) 208 mark_region(zorro_resource_start(z), 209 zorro_resource_end(z)+1, 1); 210 } 211 212 /* Unmark all used Zorro II memory */ 213 for (i = 0; i < m68k_num_memory; i++) 214 if (m68k_memory[i].addr < 16*1024*1024) 215 mark_region(m68k_memory[i].addr, 216 m68k_memory[i].addr+m68k_memory[i].size, 217 0); 218 219 return 0; 220 } 221 222 static struct platform_driver amiga_zorro_driver = { 223 .driver = { 224 .name = "amiga-zorro", 225 .owner = THIS_MODULE, 226 }, 227 }; 228 229 static int __init amiga_zorro_init(void) 230 { 231 return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe); 232 } 233 234 module_init(amiga_zorro_init); 235 236 MODULE_LICENSE("GPL"); 237