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10#include <linux/moduleparam.h>
11#include <linux/export.h>
12#include <linux/debugfs.h>
13#include <linux/fs.h>
14#include <linux/seq_file.h>
15#include <linux/slab.h>
16#include <linux/stat.h>
17#include <linux/fault-inject.h>
18
19#include <linux/mmc/card.h>
20#include <linux/mmc/host.h>
21
22#include "core.h"
23#include "card.h"
24#include "host.h"
25#include "mmc_ops.h"
26
27#ifdef CONFIG_FAIL_MMC_REQUEST
28
29static DECLARE_FAULT_ATTR(fail_default_attr);
30static char *fail_request;
31module_param(fail_request, charp, 0);
32
33#endif
34
35
36static int mmc_ios_show(struct seq_file *s, void *data)
37{
38 static const char *vdd_str[] = {
39 [8] = "2.0",
40 [9] = "2.1",
41 [10] = "2.2",
42 [11] = "2.3",
43 [12] = "2.4",
44 [13] = "2.5",
45 [14] = "2.6",
46 [15] = "2.7",
47 [16] = "2.8",
48 [17] = "2.9",
49 [18] = "3.0",
50 [19] = "3.1",
51 [20] = "3.2",
52 [21] = "3.3",
53 [22] = "3.4",
54 [23] = "3.5",
55 [24] = "3.6",
56 };
57 struct mmc_host *host = s->private;
58 struct mmc_ios *ios = &host->ios;
59 const char *str;
60
61 seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
62 if (host->actual_clock)
63 seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
64 seq_printf(s, "vdd:\t\t%u ", ios->vdd);
65 if ((1 << ios->vdd) & MMC_VDD_165_195)
66 seq_printf(s, "(1.65 - 1.95 V)\n");
67 else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1)
68 && vdd_str[ios->vdd] && vdd_str[ios->vdd + 1])
69 seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd],
70 vdd_str[ios->vdd + 1]);
71 else
72 seq_printf(s, "(invalid)\n");
73
74 switch (ios->bus_mode) {
75 case MMC_BUSMODE_OPENDRAIN:
76 str = "open drain";
77 break;
78 case MMC_BUSMODE_PUSHPULL:
79 str = "push-pull";
80 break;
81 default:
82 str = "invalid";
83 break;
84 }
85 seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str);
86
87 switch (ios->chip_select) {
88 case MMC_CS_DONTCARE:
89 str = "don't care";
90 break;
91 case MMC_CS_HIGH:
92 str = "active high";
93 break;
94 case MMC_CS_LOW:
95 str = "active low";
96 break;
97 default:
98 str = "invalid";
99 break;
100 }
101 seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str);
102
103 switch (ios->power_mode) {
104 case MMC_POWER_OFF:
105 str = "off";
106 break;
107 case MMC_POWER_UP:
108 str = "up";
109 break;
110 case MMC_POWER_ON:
111 str = "on";
112 break;
113 default:
114 str = "invalid";
115 break;
116 }
117 seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str);
118 seq_printf(s, "bus width:\t%u (%u bits)\n",
119 ios->bus_width, 1 << ios->bus_width);
120
121 switch (ios->timing) {
122 case MMC_TIMING_LEGACY:
123 str = "legacy";
124 break;
125 case MMC_TIMING_MMC_HS:
126 str = "mmc high-speed";
127 break;
128 case MMC_TIMING_SD_HS:
129 str = "sd high-speed";
130 break;
131 case MMC_TIMING_UHS_SDR12:
132 str = "sd uhs SDR12";
133 break;
134 case MMC_TIMING_UHS_SDR25:
135 str = "sd uhs SDR25";
136 break;
137 case MMC_TIMING_UHS_SDR50:
138 str = "sd uhs SDR50";
139 break;
140 case MMC_TIMING_UHS_SDR104:
141 str = "sd uhs SDR104";
142 break;
143 case MMC_TIMING_UHS_DDR50:
144 str = "sd uhs DDR50";
145 break;
146 case MMC_TIMING_MMC_DDR52:
147 str = "mmc DDR52";
148 break;
149 case MMC_TIMING_MMC_HS200:
150 str = "mmc HS200";
151 break;
152 case MMC_TIMING_MMC_HS400:
153 str = mmc_card_hs400es(host->card) ?
154 "mmc HS400 enhanced strobe" : "mmc HS400";
155 break;
156 default:
157 str = "invalid";
158 break;
159 }
160 seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
161
162 switch (ios->signal_voltage) {
163 case MMC_SIGNAL_VOLTAGE_330:
164 str = "3.30 V";
165 break;
166 case MMC_SIGNAL_VOLTAGE_180:
167 str = "1.80 V";
168 break;
169 case MMC_SIGNAL_VOLTAGE_120:
170 str = "1.20 V";
171 break;
172 default:
173 str = "invalid";
174 break;
175 }
176 seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
177
178 switch (ios->drv_type) {
179 case MMC_SET_DRIVER_TYPE_A:
180 str = "driver type A";
181 break;
182 case MMC_SET_DRIVER_TYPE_B:
183 str = "driver type B";
184 break;
185 case MMC_SET_DRIVER_TYPE_C:
186 str = "driver type C";
187 break;
188 case MMC_SET_DRIVER_TYPE_D:
189 str = "driver type D";
190 break;
191 default:
192 str = "invalid";
193 break;
194 }
195 seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
196
197 return 0;
198}
199DEFINE_SHOW_ATTRIBUTE(mmc_ios);
200
201static int mmc_clock_opt_get(void *data, u64 *val)
202{
203 struct mmc_host *host = data;
204
205 *val = host->ios.clock;
206
207 return 0;
208}
209
210static int mmc_clock_opt_set(void *data, u64 val)
211{
212 struct mmc_host *host = data;
213
214
215 if (val != 0 && (val > host->f_max || val < host->f_min))
216 return -EINVAL;
217
218 mmc_claim_host(host);
219 mmc_set_clock(host, (unsigned int) val);
220 mmc_release_host(host);
221
222 return 0;
223}
224
225DEFINE_SIMPLE_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
226 "%llu\n");
227
228void mmc_add_host_debugfs(struct mmc_host *host)
229{
230 struct dentry *root;
231
232 root = debugfs_create_dir(mmc_hostname(host), NULL);
233 if (IS_ERR(root))
234
235 return;
236 if (!root)
237
238
239 goto err_root;
240
241 host->debugfs_root = root;
242
243 if (!debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops))
244 goto err_node;
245
246 if (!debugfs_create_x32("caps", S_IRUSR, root, &host->caps))
247 goto err_node;
248
249 if (!debugfs_create_x32("caps2", S_IRUSR, root, &host->caps2))
250 goto err_node;
251
252 if (!debugfs_create_file("clock", S_IRUSR | S_IWUSR, root, host,
253 &mmc_clock_fops))
254 goto err_node;
255
256#ifdef CONFIG_FAIL_MMC_REQUEST
257 if (fail_request)
258 setup_fault_attr(&fail_default_attr, fail_request);
259 host->fail_mmc_request = fail_default_attr;
260 if (IS_ERR(fault_create_debugfs_attr("fail_mmc_request",
261 root,
262 &host->fail_mmc_request)))
263 goto err_node;
264#endif
265 return;
266
267err_node:
268 debugfs_remove_recursive(root);
269 host->debugfs_root = NULL;
270err_root:
271 dev_err(&host->class_dev, "failed to initialize debugfs\n");
272}
273
274void mmc_remove_host_debugfs(struct mmc_host *host)
275{
276 debugfs_remove_recursive(host->debugfs_root);
277}
278
279void mmc_add_card_debugfs(struct mmc_card *card)
280{
281 struct mmc_host *host = card->host;
282 struct dentry *root;
283
284 if (!host->debugfs_root)
285 return;
286
287 root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
288 if (IS_ERR(root))
289
290 return;
291 if (!root)
292
293
294 goto err;
295
296 card->debugfs_root = root;
297
298 if (!debugfs_create_x32("state", S_IRUSR, root, &card->state))
299 goto err;
300
301 return;
302
303err:
304 debugfs_remove_recursive(root);
305 card->debugfs_root = NULL;
306 dev_err(&card->dev, "failed to initialize debugfs\n");
307}
308
309void mmc_remove_card_debugfs(struct mmc_card *card)
310{
311 debugfs_remove_recursive(card->debugfs_root);
312 card->debugfs_root = NULL;
313}
314
