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/setup.h> 22 #include <asm/amigahw.h> 23 24 #include "zorro.h" 25 26 27 /* 28 * Zorro Expansion Devices 29 */ 30 31 unsigned int zorro_num_autocon; 32 struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO]; 33 34 35 /* 36 * Zorro bus 37 */ 38 39 struct zorro_bus { 40 struct device dev; 41 }; 42 43 44 /* 45 * Find Zorro Devices 46 */ 47 48 struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) 49 { 50 struct zorro_dev *z; 51 52 if (!zorro_num_autocon) 53 return NULL; 54 55 for (z = from ? from+1 : &zorro_autocon[0]; 56 z < zorro_autocon+zorro_num_autocon; 57 z++) 58 if (id == ZORRO_WILDCARD || id == z->id) 59 return z; 60 return NULL; 61 } 62 EXPORT_SYMBOL(zorro_find_device); 63 64 65 /* 66 * Bitmask indicating portions of available Zorro II RAM that are unused 67 * by the system. Every bit represents a 64K chunk, for a maximum of 8MB 68 * (128 chunks, physical 0x00200000-0x009fffff). 69 * 70 * If you want to use (= allocate) portions of this RAM, you should clear 71 * the corresponding bits. 72 * 73 * Possible uses: 74 * - z2ram device 75 * - SCSI DMA bounce buffers 76 * 77 * FIXME: use the normal resource management 78 */ 79 80 DECLARE_BITMAP(zorro_unused_z2ram, 128); 81 EXPORT_SYMBOL(zorro_unused_z2ram); 82 83 84 static void __init mark_region(unsigned long start, unsigned long end, 85 int flag) 86 { 87 if (flag) 88 start += Z2RAM_CHUNKMASK; 89 else 90 end += Z2RAM_CHUNKMASK; 91 start &= ~Z2RAM_CHUNKMASK; 92 end &= ~Z2RAM_CHUNKMASK; 93 94 if (end <= Z2RAM_START || start >= Z2RAM_END) 95 return; 96 start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START; 97 end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START; 98 while (start < end) { 99 u32 chunk = start>>Z2RAM_CHUNKSHIFT; 100 if (flag) 101 set_bit(chunk, zorro_unused_z2ram); 102 else 103 clear_bit(chunk, zorro_unused_z2ram); 104 start += Z2RAM_CHUNKSIZE; 105 } 106 } 107 108 109 static struct resource __init *zorro_find_parent_resource( 110 struct platform_device *bridge, struct zorro_dev *z) 111 { 112 int i; 113 114 for (i = 0; i < bridge->num_resources; i++) { 115 struct resource *r = &bridge->resource[i]; 116 if (zorro_resource_start(z) >= r->start && 117 zorro_resource_end(z) <= r->end) 118 return r; 119 } 120 return &iomem_resource; 121 } 122 123 124 125 static int __init amiga_zorro_probe(struct platform_device *pdev) 126 { 127 struct zorro_bus *bus; 128 struct zorro_dev *z; 129 struct resource *r; 130 unsigned int i; 131 int error; 132 133 /* Initialize the Zorro bus */ 134 bus = kzalloc(sizeof(*bus), GFP_KERNEL); 135 if (!bus) 136 return -ENOMEM; 137 138 bus->dev.parent = &pdev->dev; 139 dev_set_name(&bus->dev, "zorro"); 140 error = device_register(&bus->dev); 141 if (error) { 142 pr_err("Zorro: Error registering zorro_bus\n"); 143 put_device(&bus->dev); 144 kfree(bus); 145 return error; 146 } 147 platform_set_drvdata(pdev, bus); 148 149 pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n", 150 zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s"); 151 152 /* First identify 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 r = zorro_find_parent_resource(pdev, z); 165 error = request_resource(r, &z->resource); 166 if (error) 167 dev_err(&bus->dev, 168 "Address space collision on device %s %pR\n", 169 z->name, &z->resource); 170 dev_set_name(&z->dev, "%02x", i); 171 z->dev.parent = &bus->dev; 172 z->dev.bus = &zorro_bus_type; 173 } 174 175 /* ... then register them */ 176 for (i = 0; i < zorro_num_autocon; i++) { 177 z = &zorro_autocon[i]; 178 error = device_register(&z->dev); 179 if (error) { 180 dev_err(&bus->dev, "Error registering device %s\n", 181 z->name); 182 put_device(&z->dev); 183 continue; 184 } 185 error = zorro_create_sysfs_dev_files(z); 186 if (error) 187 dev_err(&z->dev, "Error creating sysfs files\n"); 188 } 189 190 /* Mark all available Zorro II memory */ 191 zorro_for_each_dev(z) { 192 if (z->rom.er_Type & ERTF_MEMLIST) 193 mark_region(zorro_resource_start(z), 194 zorro_resource_end(z)+1, 1); 195 } 196 197 /* Unmark all used Zorro II memory */ 198 for (i = 0; i < m68k_num_memory; i++) 199 if (m68k_memory[i].addr < 16*1024*1024) 200 mark_region(m68k_memory[i].addr, 201 m68k_memory[i].addr+m68k_memory[i].size, 202 0); 203 204 return 0; 205 } 206 207 static struct platform_driver amiga_zorro_driver = { 208 .driver = { 209 .name = "amiga-zorro", 210 .owner = THIS_MODULE, 211 }, 212 }; 213 214 static int __init amiga_zorro_init(void) 215 { 216 return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe); 217 } 218 219 module_init(amiga_zorro_init); 220 221 MODULE_LICENSE("GPL"); 222