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394b701c MP |
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/config.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/rio.h> | |
16 | #include <linux/rio_drv.h> | |
17 | #include <linux/stat.h> | |
de25968c | 18 | #include <linux/sched.h> /* for capable() */ |
394b701c MP |
19 | |
20 | #include "rio.h" | |
21 | ||
22 | /* Sysfs support */ | |
23 | #define rio_config_attr(field, format_string) \ | |
24 | static ssize_t \ | |
6978bbc0 | 25 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
394b701c MP |
26 | { \ |
27 | struct rio_dev *rdev = to_rio_dev(dev); \ | |
28 | \ | |
29 | return sprintf(buf, format_string, rdev->field); \ | |
30 | } \ | |
31 | ||
32 | rio_config_attr(did, "0x%04x\n"); | |
33 | rio_config_attr(vid, "0x%04x\n"); | |
34 | rio_config_attr(device_rev, "0x%08x\n"); | |
35 | rio_config_attr(asm_did, "0x%04x\n"); | |
36 | rio_config_attr(asm_vid, "0x%04x\n"); | |
37 | rio_config_attr(asm_rev, "0x%04x\n"); | |
38 | ||
6978bbc0 | 39 | static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf) |
394b701c MP |
40 | { |
41 | struct rio_dev *rdev = to_rio_dev(dev); | |
42 | char *str = buf; | |
43 | int i; | |
44 | ||
45 | if (!rdev->rswitch) | |
46 | goto out; | |
47 | ||
48 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++) { | |
49 | if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE) | |
50 | continue; | |
51 | str += | |
52 | sprintf(str, "%04x %02x\n", i, | |
53 | rdev->rswitch->route_table[i]); | |
54 | } | |
55 | ||
56 | out: | |
57 | return (str - buf); | |
58 | } | |
59 | ||
60 | struct device_attribute rio_dev_attrs[] = { | |
61 | __ATTR_RO(did), | |
62 | __ATTR_RO(vid), | |
63 | __ATTR_RO(device_rev), | |
64 | __ATTR_RO(asm_did), | |
65 | __ATTR_RO(asm_vid), | |
66 | __ATTR_RO(asm_rev), | |
67 | __ATTR_RO(routes), | |
68 | __ATTR_NULL, | |
69 | }; | |
70 | ||
71 | static ssize_t | |
72 | rio_read_config(struct kobject *kobj, 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, char *buf, loff_t off, size_t count) | |
143 | { | |
144 | struct rio_dev *dev = | |
145 | to_rio_dev(container_of(kobj, struct device, kobj)); | |
146 | unsigned int size = count; | |
147 | loff_t init_off = off; | |
148 | u8 *data = (u8 *) buf; | |
149 | ||
150 | if (off > 0x200000) | |
151 | return 0; | |
152 | if (off + count > 0x200000) { | |
153 | size = 0x200000 - off; | |
154 | count = size; | |
155 | } | |
156 | ||
157 | if ((off & 1) && size) { | |
158 | rio_write_config_8(dev, off, data[off - init_off]); | |
159 | off++; | |
160 | size--; | |
161 | } | |
162 | ||
163 | if ((off & 3) && (size > 2)) { | |
164 | u16 val = data[off - init_off + 1]; | |
165 | val |= (u16) data[off - init_off] << 8; | |
166 | rio_write_config_16(dev, off, val); | |
167 | off += 2; | |
168 | size -= 2; | |
169 | } | |
170 | ||
171 | while (size > 3) { | |
172 | u32 val = data[off - init_off + 3]; | |
173 | val |= (u32) data[off - init_off + 2] << 8; | |
174 | val |= (u32) data[off - init_off + 1] << 16; | |
175 | val |= (u32) data[off - init_off] << 24; | |
176 | rio_write_config_32(dev, off, val); | |
177 | off += 4; | |
178 | size -= 4; | |
179 | } | |
180 | ||
181 | if (size >= 2) { | |
182 | u16 val = data[off - init_off + 1]; | |
183 | val |= (u16) data[off - init_off] << 8; | |
184 | rio_write_config_16(dev, off, val); | |
185 | off += 2; | |
186 | size -= 2; | |
187 | } | |
188 | ||
189 | if (size) { | |
190 | rio_write_config_8(dev, off, data[off - init_off]); | |
191 | off++; | |
192 | --size; | |
193 | } | |
194 | ||
195 | return count; | |
196 | } | |
197 | ||
198 | static struct bin_attribute rio_config_attr = { | |
199 | .attr = { | |
200 | .name = "config", | |
201 | .mode = S_IRUGO | S_IWUSR, | |
202 | .owner = THIS_MODULE, | |
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 | sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr); | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | /** | |
223 | * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files | |
224 | * @rdev: device whose entries we should free | |
225 | * | |
226 | * Cleanup when @rdev is removed from sysfs. | |
227 | */ | |
228 | void rio_remove_sysfs_dev_files(struct rio_dev *rdev) | |
229 | { | |
230 | sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr); | |
231 | } |