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/dma-mapping.h> 20 #include <linux/slab.h> 21 #include <linux/string_choices.h> 22 23 #include <asm/byteorder.h> 24 #include <asm/setup.h> 25 #include <asm/amigahw.h> 26 27 #include "zorro.h" 28 29 30 /* 31 * Zorro Expansion Devices 32 */ 33 34 unsigned int zorro_num_autocon; 35 struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata; 36 struct zorro_dev *zorro_autocon; 37 38 39 /* 40 * Zorro bus 41 */ 42 43 struct zorro_bus { 44 struct device dev; 45 struct zorro_dev devices[]; 46 }; 47 48 49 /* 50 * Find Zorro Devices 51 */ 52 53 struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) 54 { 55 struct zorro_dev *z; 56 57 if (!zorro_num_autocon) 58 return NULL; 59 60 for (z = from ? from+1 : &zorro_autocon[0]; 61 z < zorro_autocon+zorro_num_autocon; 62 z++) 63 if (id == ZORRO_WILDCARD || id == z->id) 64 return z; 65 return NULL; 66 } 67 EXPORT_SYMBOL(zorro_find_device); 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 EXPORT_SYMBOL(zorro_unused_z2ram); 87 88 89 static void __init mark_region(unsigned long start, unsigned long end, 90 int flag) 91 { 92 if (flag) 93 start += Z2RAM_CHUNKMASK; 94 else 95 end += Z2RAM_CHUNKMASK; 96 start &= ~Z2RAM_CHUNKMASK; 97 end &= ~Z2RAM_CHUNKMASK; 98 99 if (end <= Z2RAM_START || start >= Z2RAM_END) 100 return; 101 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START; 102 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START; 103 while (start < end) { 104 u32 chunk = start>>Z2RAM_CHUNKSHIFT; 105 106 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( 116 struct platform_device *bridge, struct zorro_dev *z) 117 { 118 int i; 119 120 for (i = 0; i < bridge->num_resources; i++) { 121 if (resource_contains(&bridge->resource[i], &z->resource)) 122 return &bridge->resource[i]; 123 } 124 125 return &iomem_resource; 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(struct_size(bus, devices, zorro_num_autocon), 139 GFP_KERNEL); 140 if (!bus) 141 return -ENOMEM; 142 143 zorro_autocon = bus->devices; 144 bus->dev.parent = &pdev->dev; 145 dev_set_name(&bus->dev, zorro_bus_type.name); 146 error = device_register(&bus->dev); 147 if (error) { 148 pr_err("Zorro: Error registering zorro_bus\n"); 149 put_device(&bus->dev); 150 kfree(bus); 151 return error; 152 } 153 platform_set_drvdata(pdev, bus); 154 155 pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n", 156 zorro_num_autocon, str_plural(zorro_num_autocon)); 157 158 /* First identify all devices ... */ 159 for (i = 0; i < zorro_num_autocon; i++) { 160 zi = &zorro_autocon_init[i]; 161 z = &zorro_autocon[i]; 162 163 z->rom = zi->rom; 164 z->id = (be16_to_cpu(z->rom.er_Manufacturer) << 16) | 165 (z->rom.er_Product << 8); 166 if (z->id == ZORRO_PROD_GVP_EPC_BASE) { 167 /* GVP quirk */ 168 unsigned long magic = zi->boardaddr + 0x8000; 169 170 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 = DEFINE_RES_MEM_NAMED(zi->boardaddr, zi->boardsize, z->name); 177 r = zorro_find_parent_resource(pdev, z); 178 error = request_resource(r, &z->resource); 179 if (error && !(z->rom.er_Type & ERTF_MEMLIST)) 180 dev_err(&bus->dev, 181 "Address space collision on device %s %pR\n", 182 z->name, &z->resource); 183 z->dev.parent = &bus->dev; 184 z->dev.bus = &zorro_bus_type; 185 z->dev.id = i; 186 switch (z->rom.er_Type & ERT_TYPEMASK) { 187 case ERT_ZORROIII: 188 z->dev.coherent_dma_mask = DMA_BIT_MASK(32); 189 break; 190 191 case ERT_ZORROII: 192 default: 193 z->dev.coherent_dma_mask = DMA_BIT_MASK(24); 194 break; 195 } 196 z->dev.dma_mask = &z->dev.coherent_dma_mask; 197 } 198 199 /* ... then register them */ 200 for (i = 0; i < zorro_num_autocon; i++) { 201 z = &zorro_autocon[i]; 202 error = device_register(&z->dev); 203 if (error) { 204 dev_err(&bus->dev, "Error registering device %s\n", 205 z->name); 206 put_device(&z->dev); 207 continue; 208 } 209 } 210 211 /* Mark all available Zorro II memory */ 212 zorro_for_each_dev(z) { 213 if (z->rom.er_Type & ERTF_MEMLIST) 214 mark_region(zorro_resource_start(z), 215 zorro_resource_end(z)+1, 1); 216 } 217 218 /* Unmark all used Zorro II memory */ 219 for (i = 0; i < m68k_num_memory; i++) 220 if (m68k_memory[i].addr < 16*1024*1024) 221 mark_region(m68k_memory[i].addr, 222 m68k_memory[i].addr+m68k_memory[i].size, 223 0); 224 225 return 0; 226 } 227 228 static struct platform_driver amiga_zorro_driver = { 229 .driver = { 230 .name = "amiga-zorro", 231 }, 232 }; 233 234 static int __init amiga_zorro_init(void) 235 { 236 return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe); 237 } 238 239 module_init(amiga_zorro_init); 240 241 MODULE_LICENSE("GPL"); 242