2 * TURBOchannel bus services.
4 * Copyright (c) Harald Koerfgen, 1998
5 * Copyright (c) 2001, 2003, 2005, 2006 Maciej W. Rozycki
6 * Copyright (c) 2005 James Simmons
8 * This file is subject to the terms and conditions of the GNU
9 * General Public License. See the file "COPYING" in the main
10 * directory of this archive for more details.
12 #include <linux/compiler.h>
13 #include <linux/errno.h>
14 #include <linux/init.h>
15 #include <linux/ioport.h>
16 #include <linux/kernel.h>
17 #include <linux/list.h>
18 #include <linux/module.h>
19 #include <linux/string.h>
21 #include <linux/types.h>
25 static struct tc_bus tc_bus = {
26 .name = "TURBOchannel",
30 * Probing for TURBOchannel modules.
32 static void __init tc_bus_add_devices(struct tc_bus *tbus)
34 resource_size_t slotsize = tbus->info.slot_size << 20;
35 resource_size_t extslotsize = tbus->ext_slot_size;
36 resource_size_t slotaddr;
37 resource_size_t extslotaddr;
38 resource_size_t devsize;
45 for (slot = 0; slot < tbus->num_tcslots; slot++) {
46 slotaddr = tbus->slot_base + slot * slotsize;
47 extslotaddr = tbus->ext_slot_base + slot * extslotsize;
48 module = ioremap_nocache(slotaddr, slotsize);
54 err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0);
55 err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1);
56 err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2);
57 err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3);
61 if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
62 pattern[2] != 0xaa || pattern[3] != 0xff) {
66 err |= tc_preadb(pattern + 0,
67 module + offset + TC_PATTERN0);
68 err |= tc_preadb(pattern + 1,
69 module + offset + TC_PATTERN1);
70 err |= tc_preadb(pattern + 2,
71 module + offset + TC_PATTERN2);
72 err |= tc_preadb(pattern + 3,
73 module + offset + TC_PATTERN3);
78 if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
79 pattern[2] != 0xaa || pattern[3] != 0xff)
82 /* Found a board, allocate it an entry in the list */
83 tdev = kzalloc(sizeof(*tdev), GFP_KERNEL);
85 printk(KERN_ERR "tc%x: unable to allocate tc_dev\n",
89 dev_set_name(&tdev->dev, "tc%x", slot);
91 tdev->dev.parent = &tbus->dev;
92 tdev->dev.bus = &tc_bus_type;
95 for (i = 0; i < 8; i++) {
97 readb(module + offset + TC_FIRM_VER + 4 * i);
99 readb(module + offset + TC_VENDOR + 4 * i);
101 readb(module + offset + TC_MODULE + 4 * i);
103 tdev->firmware[8] = 0;
107 pr_info("%s: %s %s %s\n", dev_name(&tdev->dev), tdev->vendor,
108 tdev->name, tdev->firmware);
110 devsize = readb(module + offset + TC_SLOT_SIZE);
112 if (devsize <= slotsize) {
113 tdev->resource.start = slotaddr;
114 tdev->resource.end = slotaddr + devsize - 1;
115 } else if (devsize <= extslotsize) {
116 tdev->resource.start = extslotaddr;
117 tdev->resource.end = extslotaddr + devsize - 1;
119 printk(KERN_ERR "%s: Cannot provide slot space "
120 "(%dMiB required, up to %dMiB supported)\n",
121 dev_name(&tdev->dev), devsize >> 20,
122 max(slotsize, extslotsize) >> 20);
126 tdev->resource.name = tdev->name;
127 tdev->resource.flags = IORESOURCE_MEM;
129 tc_device_get_irq(tdev);
131 device_register(&tdev->dev);
132 list_add_tail(&tdev->node, &tbus->devices);
142 static int __init tc_init(void)
144 /* Initialize the TURBOchannel bus */
145 if (tc_bus_get_info(&tc_bus))
148 INIT_LIST_HEAD(&tc_bus.devices);
149 dev_set_name(&tc_bus.dev, "tc");
150 device_register(&tc_bus.dev);
152 if (tc_bus.info.slot_size) {
153 unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000;
155 pr_info("tc: TURBOchannel rev. %d at %d.%d MHz "
156 "(with%s parity)\n", tc_bus.info.revision,
157 tc_clock / 10, tc_clock % 10,
158 tc_bus.info.parity ? "" : "out");
160 tc_bus.resource[0].start = tc_bus.slot_base;
161 tc_bus.resource[0].end = tc_bus.slot_base +
162 (tc_bus.info.slot_size << 20) *
163 tc_bus.num_tcslots - 1;
164 tc_bus.resource[0].name = tc_bus.name;
165 tc_bus.resource[0].flags = IORESOURCE_MEM;
166 if (request_resource(&iomem_resource,
167 &tc_bus.resource[0]) < 0) {
168 printk(KERN_ERR "tc: Cannot reserve resource\n");
171 if (tc_bus.ext_slot_size) {
172 tc_bus.resource[1].start = tc_bus.ext_slot_base;
173 tc_bus.resource[1].end = tc_bus.ext_slot_base +
174 tc_bus.ext_slot_size *
175 tc_bus.num_tcslots - 1;
176 tc_bus.resource[1].name = tc_bus.name;
177 tc_bus.resource[1].flags = IORESOURCE_MEM;
178 if (request_resource(&iomem_resource,
179 &tc_bus.resource[1]) < 0) {
181 "tc: Cannot reserve resource\n");
182 release_resource(&tc_bus.resource[0]);
187 tc_bus_add_devices(&tc_bus);
193 subsys_initcall(tc_init);