1 /*
2 * RapidIO sysfs attributes and support
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/rio.h>
15 #include <linux/rio_drv.h>
16 #include <linux/stat.h>
17
18 #include "rio.h"
19
20 /* Sysfs support */
21 #define rio_config_attr(field, format_string) \
22 static ssize_t \
23 field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
24 { \
25 struct rio_dev *rdev = to_rio_dev(dev); \
26 \
27 return sprintf(buf, format_string, rdev->field); \
28 } \
29
30 rio_config_attr(did, "0x%04x\n");
31 rio_config_attr(vid, "0x%04x\n");
32 rio_config_attr(device_rev, "0x%08x\n");
33 rio_config_attr(asm_did, "0x%04x\n");
34 rio_config_attr(asm_vid, "0x%04x\n");
35 rio_config_attr(asm_rev, "0x%04x\n");
36
37 static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
38 {
39 struct rio_dev *rdev = to_rio_dev(dev);
40 char *str = buf;
41 int i;
42
43 if (!rdev->rswitch)
44 goto out;
45
46 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
47 i++) {
48 if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
49 continue;
50 str +=
51 sprintf(str, "%04x %02x\n", i,
52 rdev->rswitch->route_table[i]);
53 }
54
55 out:
56 return (str - buf);
57 }
58
59 struct device_attribute rio_dev_attrs[] = {
60 __ATTR_RO(did),
61 __ATTR_RO(vid),
62 __ATTR_RO(device_rev),
63 __ATTR_RO(asm_did),
64 __ATTR_RO(asm_vid),
65 __ATTR_RO(asm_rev),
66 __ATTR_RO(routes),
67 __ATTR_NULL,
68 };
69
70 static ssize_t
71 rio_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
72 char *buf, loff_t off, size_t count)
73 {
74 struct rio_dev *dev =
75 to_rio_dev(container_of(kobj, struct device, kobj));
76 unsigned int size = 0x100;
77 loff_t init_off = off;
78 u8 *data = (u8 *) buf;
79
80 /* Several chips lock up trying to read undefined config space */
81 if (capable(CAP_SYS_ADMIN))
82 size = 0x200000;
83
84 if (off > size)
85 return 0;
86 if (off + count > size) {
87 size -= off;
88 count = size;
89 } else {
90 size = count;
91 }
92
93 if ((off & 1) && size) {
94 u8 val;
95 rio_read_config_8(dev, off, &val);
96 data[off - init_off] = val;
97 off++;
98 size--;
99 }
100
101 if ((off & 3) && size > 2) {
102 u16 val;
103 rio_read_config_16(dev, off, &val);
104 data[off - init_off] = (val >> 8) & 0xff;
105 data[off - init_off + 1] = val & 0xff;
106 off += 2;
107 size -= 2;
108 }
109
110 while (size > 3) {
111 u32 val;
112 rio_read_config_32(dev, off, &val);
113 data[off - init_off] = (val >> 24) & 0xff;
114 data[off - init_off + 1] = (val >> 16) & 0xff;
115 data[off - init_off + 2] = (val >> 8) & 0xff;
116 data[off - init_off + 3] = val & 0xff;
117 off += 4;
118 size -= 4;
119 }
120
121 if (size >= 2) {
122 u16 val;
123 rio_read_config_16(dev, off, &val);
124 data[off - init_off] = (val >> 8) & 0xff;
125 data[off - init_off + 1] = val & 0xff;
126 off += 2;
127 size -= 2;
128 }
129
130 if (size > 0) {
131 u8 val;
132 rio_read_config_8(dev, off, &val);
133 data[off - init_off] = val;
134 off++;
135 --size;
136 }
137
138 return count;
139 }
140
141 static ssize_t
142 rio_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
143 char *buf, loff_t off, size_t count)
144 {
145 struct rio_dev *dev =
146 to_rio_dev(container_of(kobj, struct device, kobj));
147 unsigned int size = count;
148 loff_t init_off = off;
149 u8 *data = (u8 *) buf;
150
151 if (off > 0x200000)
152 return 0;
153 if (off + count > 0x200000) {
154 size = 0x200000 - off;
155 count = size;
156 }
157
158 if ((off & 1) && size) {
159 rio_write_config_8(dev, off, data[off - init_off]);
160 off++;
161 size--;
162 }
163
164 if ((off & 3) && (size > 2)) {
165 u16 val = data[off - init_off + 1];
166 val |= (u16) data[off - init_off] << 8;
167 rio_write_config_16(dev, off, val);
168 off += 2;
169 size -= 2;
170 }
171
172 while (size > 3) {
173 u32 val = data[off - init_off + 3];
174 val |= (u32) data[off - init_off + 2] << 8;
175 val |= (u32) data[off - init_off + 1] << 16;
176 val |= (u32) data[off - init_off] << 24;
177 rio_write_config_32(dev, off, val);
178 off += 4;
179 size -= 4;
180 }
181
182 if (size >= 2) {
183 u16 val = data[off - init_off + 1];
184 val |= (u16) data[off - init_off] << 8;
185 rio_write_config_16(dev, off, val);
186 off += 2;
187 size -= 2;
188 }
189
190 if (size) {
191 rio_write_config_8(dev, off, data[off - init_off]);
192 off++;
193 --size;
194 }
195
196 return count;
197 }
198
199 static struct bin_attribute rio_config_attr = {
200 .attr = {
201 .name = "config",
202 .mode = S_IRUGO | S_IWUSR,
203 },
204 .size = 0x200000,
205 .read = rio_read_config,
206 .write = rio_write_config,
207 };
208
209 /**
210 * rio_create_sysfs_dev_files - create RIO specific sysfs files
211 * @rdev: device whose entries should be created
212 *
213 * Create files when @rdev is added to sysfs.
214 */
215 int rio_create_sysfs_dev_files(struct rio_dev *rdev)
216 {
217 int err = 0;
218
219 err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
220
221 return err;
222 }
223
224 /**
225 * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
226 * @rdev: device whose entries we should free
227 *
228 * Cleanup when @rdev is removed from sysfs.
229 */
230 void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
231 {
232 sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
233 }
234
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