Commit | Line | Data |
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6edd8ee6 HS |
1 | /* |
2 | * Debugfs support for hosts and cards | |
3 | * | |
4 | * Copyright (C) 2008 Atmel Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/debugfs.h> | |
11 | #include <linux/fs.h> | |
12 | #include <linux/seq_file.h> | |
13 | #include <linux/stat.h> | |
14 | ||
f4b7f927 | 15 | #include <linux/mmc/card.h> |
6edd8ee6 HS |
16 | #include <linux/mmc/host.h> |
17 | ||
18 | #include "core.h" | |
f4b7f927 | 19 | #include "mmc_ops.h" |
6edd8ee6 HS |
20 | |
21 | /* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */ | |
22 | static int mmc_ios_show(struct seq_file *s, void *data) | |
23 | { | |
24 | static const char *vdd_str[] = { | |
25 | [8] = "2.0", | |
26 | [9] = "2.1", | |
27 | [10] = "2.2", | |
28 | [11] = "2.3", | |
29 | [12] = "2.4", | |
30 | [13] = "2.5", | |
31 | [14] = "2.6", | |
32 | [15] = "2.7", | |
33 | [16] = "2.8", | |
34 | [17] = "2.9", | |
35 | [18] = "3.0", | |
36 | [19] = "3.1", | |
37 | [20] = "3.2", | |
38 | [21] = "3.3", | |
39 | [22] = "3.4", | |
40 | [23] = "3.5", | |
41 | [24] = "3.6", | |
42 | }; | |
43 | struct mmc_host *host = s->private; | |
44 | struct mmc_ios *ios = &host->ios; | |
45 | const char *str; | |
46 | ||
47 | seq_printf(s, "clock:\t\t%u Hz\n", ios->clock); | |
48 | seq_printf(s, "vdd:\t\t%u ", ios->vdd); | |
49 | if ((1 << ios->vdd) & MMC_VDD_165_195) | |
50 | seq_printf(s, "(1.65 - 1.95 V)\n"); | |
51 | else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1) | |
52 | && vdd_str[ios->vdd] && vdd_str[ios->vdd + 1]) | |
53 | seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd], | |
54 | vdd_str[ios->vdd + 1]); | |
55 | else | |
56 | seq_printf(s, "(invalid)\n"); | |
57 | ||
58 | switch (ios->bus_mode) { | |
59 | case MMC_BUSMODE_OPENDRAIN: | |
60 | str = "open drain"; | |
61 | break; | |
62 | case MMC_BUSMODE_PUSHPULL: | |
63 | str = "push-pull"; | |
64 | break; | |
65 | default: | |
66 | str = "invalid"; | |
67 | break; | |
68 | } | |
69 | seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str); | |
70 | ||
71 | switch (ios->chip_select) { | |
72 | case MMC_CS_DONTCARE: | |
73 | str = "don't care"; | |
74 | break; | |
75 | case MMC_CS_HIGH: | |
76 | str = "active high"; | |
77 | break; | |
78 | case MMC_CS_LOW: | |
79 | str = "active low"; | |
80 | break; | |
81 | default: | |
82 | str = "invalid"; | |
83 | break; | |
84 | } | |
85 | seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str); | |
86 | ||
87 | switch (ios->power_mode) { | |
88 | case MMC_POWER_OFF: | |
89 | str = "off"; | |
90 | break; | |
91 | case MMC_POWER_UP: | |
92 | str = "up"; | |
93 | break; | |
94 | case MMC_POWER_ON: | |
95 | str = "on"; | |
96 | break; | |
97 | default: | |
98 | str = "invalid"; | |
99 | break; | |
100 | } | |
101 | seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str); | |
102 | seq_printf(s, "bus width:\t%u (%u bits)\n", | |
103 | ios->bus_width, 1 << ios->bus_width); | |
104 | ||
105 | switch (ios->timing) { | |
106 | case MMC_TIMING_LEGACY: | |
107 | str = "legacy"; | |
108 | break; | |
109 | case MMC_TIMING_MMC_HS: | |
110 | str = "mmc high-speed"; | |
111 | break; | |
112 | case MMC_TIMING_SD_HS: | |
113 | str = "sd high-speed"; | |
114 | break; | |
115 | default: | |
116 | str = "invalid"; | |
117 | break; | |
118 | } | |
119 | seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static int mmc_ios_open(struct inode *inode, struct file *file) | |
125 | { | |
126 | return single_open(file, mmc_ios_show, inode->i_private); | |
127 | } | |
128 | ||
129 | static const struct file_operations mmc_ios_fops = { | |
130 | .open = mmc_ios_open, | |
131 | .read = seq_read, | |
132 | .llseek = seq_lseek, | |
133 | .release = single_release, | |
134 | }; | |
135 | ||
136 | void mmc_add_host_debugfs(struct mmc_host *host) | |
137 | { | |
138 | struct dentry *root; | |
139 | ||
140 | root = debugfs_create_dir(mmc_hostname(host), NULL); | |
141 | if (IS_ERR(root)) | |
142 | /* Don't complain -- debugfs just isn't enabled */ | |
143 | return; | |
144 | if (!root) | |
145 | /* Complain -- debugfs is enabled, but it failed to | |
146 | * create the directory. */ | |
147 | goto err_root; | |
148 | ||
149 | host->debugfs_root = root; | |
150 | ||
151 | if (!debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops)) | |
152 | goto err_ios; | |
153 | ||
154 | return; | |
155 | ||
156 | err_ios: | |
157 | debugfs_remove_recursive(root); | |
158 | host->debugfs_root = NULL; | |
159 | err_root: | |
160 | dev_err(&host->class_dev, "failed to initialize debugfs\n"); | |
161 | } | |
162 | ||
163 | void mmc_remove_host_debugfs(struct mmc_host *host) | |
164 | { | |
165 | debugfs_remove_recursive(host->debugfs_root); | |
166 | } | |
f4b7f927 HS |
167 | |
168 | static int mmc_dbg_card_status_get(void *data, u64 *val) | |
169 | { | |
170 | struct mmc_card *card = data; | |
171 | u32 status; | |
172 | int ret; | |
173 | ||
174 | mmc_claim_host(card->host); | |
175 | ||
176 | ret = mmc_send_status(data, &status); | |
177 | if (!ret) | |
178 | *val = status; | |
179 | ||
180 | mmc_release_host(card->host); | |
181 | ||
182 | return ret; | |
183 | } | |
184 | DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get, | |
185 | NULL, "%08llx\n"); | |
186 | ||
736bb6bb AH |
187 | #define EXT_CSD_STR_LEN 1025 |
188 | ||
189 | static int mmc_ext_csd_open(struct inode *inode, struct file *filp) | |
190 | { | |
191 | struct mmc_card *card = inode->i_private; | |
192 | char *buf; | |
193 | ssize_t n = 0; | |
194 | u8 *ext_csd; | |
195 | int err, i; | |
196 | ||
197 | buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL); | |
198 | if (!buf) | |
199 | return -ENOMEM; | |
200 | ||
201 | ext_csd = kmalloc(512, GFP_KERNEL); | |
202 | if (!ext_csd) { | |
203 | err = -ENOMEM; | |
204 | goto out_free; | |
205 | } | |
206 | ||
207 | mmc_claim_host(card->host); | |
208 | err = mmc_send_ext_csd(card, ext_csd); | |
209 | mmc_release_host(card->host); | |
210 | if (err) | |
211 | goto out_free; | |
212 | ||
213 | for (i = 511; i >= 0; i--) | |
214 | n += sprintf(buf + n, "%02x", ext_csd[i]); | |
215 | n += sprintf(buf + n, "\n"); | |
216 | BUG_ON(n != EXT_CSD_STR_LEN); | |
217 | ||
218 | filp->private_data = buf; | |
219 | kfree(ext_csd); | |
220 | return 0; | |
221 | ||
222 | out_free: | |
223 | kfree(buf); | |
224 | kfree(ext_csd); | |
225 | return err; | |
226 | } | |
227 | ||
228 | static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf, | |
229 | size_t cnt, loff_t *ppos) | |
230 | { | |
231 | char *buf = filp->private_data; | |
232 | ||
233 | return simple_read_from_buffer(ubuf, cnt, ppos, | |
234 | buf, EXT_CSD_STR_LEN); | |
235 | } | |
236 | ||
237 | static int mmc_ext_csd_release(struct inode *inode, struct file *file) | |
238 | { | |
239 | kfree(file->private_data); | |
240 | return 0; | |
241 | } | |
242 | ||
828c0950 | 243 | static const struct file_operations mmc_dbg_ext_csd_fops = { |
736bb6bb AH |
244 | .open = mmc_ext_csd_open, |
245 | .read = mmc_ext_csd_read, | |
246 | .release = mmc_ext_csd_release, | |
247 | }; | |
248 | ||
f4b7f927 HS |
249 | void mmc_add_card_debugfs(struct mmc_card *card) |
250 | { | |
251 | struct mmc_host *host = card->host; | |
252 | struct dentry *root; | |
253 | ||
254 | if (!host->debugfs_root) | |
255 | return; | |
256 | ||
257 | root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root); | |
258 | if (IS_ERR(root)) | |
259 | /* Don't complain -- debugfs just isn't enabled */ | |
260 | return; | |
261 | if (!root) | |
262 | /* Complain -- debugfs is enabled, but it failed to | |
263 | * create the directory. */ | |
264 | goto err; | |
265 | ||
266 | card->debugfs_root = root; | |
267 | ||
268 | if (!debugfs_create_x32("state", S_IRUSR, root, &card->state)) | |
269 | goto err; | |
270 | ||
271 | if (mmc_card_mmc(card) || mmc_card_sd(card)) | |
272 | if (!debugfs_create_file("status", S_IRUSR, root, card, | |
273 | &mmc_dbg_card_status_fops)) | |
274 | goto err; | |
275 | ||
736bb6bb AH |
276 | if (mmc_card_mmc(card)) |
277 | if (!debugfs_create_file("ext_csd", S_IRUSR, root, card, | |
278 | &mmc_dbg_ext_csd_fops)) | |
279 | goto err; | |
280 | ||
f4b7f927 HS |
281 | return; |
282 | ||
283 | err: | |
284 | debugfs_remove_recursive(root); | |
285 | card->debugfs_root = NULL; | |
286 | dev_err(&card->dev, "failed to initialize debugfs\n"); | |
287 | } | |
288 | ||
289 | void mmc_remove_card_debugfs(struct mmc_card *card) | |
290 | { | |
291 | debugfs_remove_recursive(card->debugfs_root); | |
292 | } |