blob: cf3fad2cb87140b810f094d390df69f51e8e3aff [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -08002 * TURBOchannel bus services.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -08004 * Copyright (c) Harald Koerfgen, 1998
Maciej W. Rozyckie7f6b412018-10-03 13:21:07 +01005 * Copyright (c) 2001, 2003, 2005, 2006, 2018 Maciej W. Rozycki
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -08006 * Copyright (c) 2005 James Simmons
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -08008 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 */
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080012#include <linux/compiler.h>
Maciej W. Rozyckie7f6b412018-10-03 13:21:07 +010013#include <linux/dma-mapping.h>
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080014#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/init.h>
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080016#include <linux/ioport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/kernel.h>
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080018#include <linux/list.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090020#include <linux/slab.h>
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +000021#include <linux/string.h>
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080022#include <linux/tc.h>
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +000023#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +000025#include <asm/io.h>
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +000026
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080027static struct tc_bus tc_bus = {
28 .name = "TURBOchannel",
29};
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Linus Torvalds1da177e2005-04-16 15:20:36 -070031/*
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080032 * Probing for TURBOchannel modules.
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080034static void __init tc_bus_add_devices(struct tc_bus *tbus)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035{
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080036 resource_size_t slotsize = tbus->info.slot_size << 20;
37 resource_size_t extslotsize = tbus->ext_slot_size;
38 resource_size_t slotaddr;
39 resource_size_t extslotaddr;
40 resource_size_t devsize;
41 void __iomem *module;
42 struct tc_dev *tdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 int i, slot, err;
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +000044 u8 pattern[4];
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080045 long offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080047 for (slot = 0; slot < tbus->num_tcslots; slot++) {
48 slotaddr = tbus->slot_base + slot * slotsize;
49 extslotaddr = tbus->ext_slot_base + slot * extslotsize;
50 module = ioremap_nocache(slotaddr, slotsize);
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +000051 BUG_ON(!module);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080053 offset = TC_OLDCARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55 err = 0;
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080056 err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0);
57 err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1);
58 err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2);
59 err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3);
60 if (err)
61 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63 if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
64 pattern[2] != 0xaa || pattern[3] != 0xff) {
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080065 offset = TC_NEWCARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67 err = 0;
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080068 err |= tc_preadb(pattern + 0,
69 module + offset + TC_PATTERN0);
70 err |= tc_preadb(pattern + 1,
71 module + offset + TC_PATTERN1);
72 err |= tc_preadb(pattern + 2,
73 module + offset + TC_PATTERN2);
74 err |= tc_preadb(pattern + 3,
75 module + offset + TC_PATTERN3);
76 if (err)
77 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 }
79
80 if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080081 pattern[2] != 0xaa || pattern[3] != 0xff)
82 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080084 /* Found a board, allocate it an entry in the list */
85 tdev = kzalloc(sizeof(*tdev), GFP_KERNEL);
86 if (!tdev) {
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +010087 pr_err("tc%x: unable to allocate tc_dev\n", slot);
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080088 goto out_err;
89 }
Kay Sieversdf388552009-03-24 16:38:22 -070090 dev_set_name(&tdev->dev, "tc%x", slot);
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -080091 tdev->bus = tbus;
92 tdev->dev.parent = &tbus->dev;
93 tdev->dev.bus = &tc_bus_type;
94 tdev->slot = slot;
95
Maciej W. Rozyckie7f6b412018-10-03 13:21:07 +010096 /* TURBOchannel has 34-bit DMA addressing (16GiB space). */
97 tdev->dma_mask = DMA_BIT_MASK(34);
98 tdev->dev.dma_mask = &tdev->dma_mask;
99 tdev->dev.coherent_dma_mask = DMA_BIT_MASK(34);
100
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +0000101 for (i = 0; i < 8; i++) {
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800102 tdev->firmware[i] =
103 readb(module + offset + TC_FIRM_VER + 4 * i);
104 tdev->vendor[i] =
105 readb(module + offset + TC_VENDOR + 4 * i);
106 tdev->name[i] =
107 readb(module + offset + TC_MODULE + 4 * i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800109 tdev->firmware[8] = 0;
110 tdev->vendor[8] = 0;
111 tdev->name[8] = 0;
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +0000112
Kay Sieversdf388552009-03-24 16:38:22 -0700113 pr_info("%s: %s %s %s\n", dev_name(&tdev->dev), tdev->vendor,
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800114 tdev->name, tdev->firmware);
115
116 devsize = readb(module + offset + TC_SLOT_SIZE);
117 devsize <<= 22;
118 if (devsize <= slotsize) {
119 tdev->resource.start = slotaddr;
120 tdev->resource.end = slotaddr + devsize - 1;
121 } else if (devsize <= extslotsize) {
122 tdev->resource.start = extslotaddr;
123 tdev->resource.end = extslotaddr + devsize - 1;
124 } else {
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +0100125 pr_err("%s: Cannot provide slot space "
126 "(%ldMiB required, up to %ldMiB supported)\n",
127 dev_name(&tdev->dev), (long)(devsize >> 20),
128 (long)(max(slotsize, extslotsize) >> 20));
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800129 kfree(tdev);
130 goto out_err;
131 }
132 tdev->resource.name = tdev->name;
133 tdev->resource.flags = IORESOURCE_MEM;
134
135 tc_device_get_irq(tdev);
136
Levente Kurusa5bb78892014-04-02 12:00:37 +0200137 if (device_register(&tdev->dev)) {
138 put_device(&tdev->dev);
139 goto out_err;
140 }
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800141 list_add_tail(&tdev->node, &tbus->devices);
142
143out_err:
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +0000144 iounmap(module);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 }
146}
147
148/*
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800149 * The main entry.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 */
Maciej W. Rozycki778220f2005-06-16 20:37:40 +0000151static int __init tc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800153 /* Initialize the TURBOchannel bus */
154 if (tc_bus_get_info(&tc_bus))
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +0100155 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800157 INIT_LIST_HEAD(&tc_bus.devices);
Kay Sieversdf388552009-03-24 16:38:22 -0700158 dev_set_name(&tc_bus.dev, "tc");
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +0100159 if (device_register(&tc_bus.dev))
160 goto out_err_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800162 if (tc_bus.info.slot_size) {
163 unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800165 pr_info("tc: TURBOchannel rev. %d at %d.%d MHz "
166 "(with%s parity)\n", tc_bus.info.revision,
167 tc_clock / 10, tc_clock % 10,
168 tc_bus.info.parity ? "" : "out");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800170 tc_bus.resource[0].start = tc_bus.slot_base;
171 tc_bus.resource[0].end = tc_bus.slot_base +
172 (tc_bus.info.slot_size << 20) *
Maciej W. Rozycki56a47da2007-02-05 16:28:26 -0800173 tc_bus.num_tcslots - 1;
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800174 tc_bus.resource[0].name = tc_bus.name;
175 tc_bus.resource[0].flags = IORESOURCE_MEM;
176 if (request_resource(&iomem_resource,
177 &tc_bus.resource[0]) < 0) {
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +0100178 pr_err("tc: Cannot reserve resource\n");
179 goto out_err_device;
Maciej W. Rozyckia5fc9c02005-07-01 16:10:40 +0000180 }
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800181 if (tc_bus.ext_slot_size) {
182 tc_bus.resource[1].start = tc_bus.ext_slot_base;
183 tc_bus.resource[1].end = tc_bus.ext_slot_base +
184 tc_bus.ext_slot_size *
Maciej W. Rozycki56a47da2007-02-05 16:28:26 -0800185 tc_bus.num_tcslots - 1;
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800186 tc_bus.resource[1].name = tc_bus.name;
187 tc_bus.resource[1].flags = IORESOURCE_MEM;
188 if (request_resource(&iomem_resource,
189 &tc_bus.resource[1]) < 0) {
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +0100190 pr_err("tc: Cannot reserve resource\n");
191 goto out_err_resource;
Maciej W. Rozyckib454cc62007-02-05 16:28:25 -0800192 }
193 }
194
195 tc_bus_add_devices(&tc_bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 }
Maciej W. Rozycki778220f2005-06-16 20:37:40 +0000197
198 return 0;
Maciej W. Rozyckie2afb7d2014-04-06 20:52:37 +0100199
200out_err_resource:
201 release_resource(&tc_bus.resource[0]);
202out_err_device:
203 put_device(&tc_bus.dev);
204out_err:
205 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206}
207
208subsys_initcall(tc_init);