arm64: dts: qcom: sm8550: add TRNG node
[linux-modified.git] / drivers / mmc / core / debugfs.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Debugfs support for hosts and cards
4  *
5  * Copyright (C) 2008 Atmel Corporation
6  */
7 #include <linux/moduleparam.h>
8 #include <linux/export.h>
9 #include <linux/debugfs.h>
10 #include <linux/fs.h>
11 #include <linux/seq_file.h>
12 #include <linux/slab.h>
13 #include <linux/stat.h>
14 #include <linux/fault-inject.h>
15 #include <linux/time.h>
16
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/mmc.h>
20 #include <linux/mmc/sd.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
29 static DECLARE_FAULT_ATTR(fail_default_attr);
30 static char *fail_request;
31 module_param(fail_request, charp, 0);
32 MODULE_PARM_DESC(fail_request, "default fault injection attributes");
33
34 #endif /* CONFIG_FAIL_MMC_REQUEST */
35
36 /* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
37 static int mmc_ios_show(struct seq_file *s, void *data)
38 {
39         static const char *vdd_str[] = {
40                 [8]     = "2.0",
41                 [9]     = "2.1",
42                 [10]    = "2.2",
43                 [11]    = "2.3",
44                 [12]    = "2.4",
45                 [13]    = "2.5",
46                 [14]    = "2.6",
47                 [15]    = "2.7",
48                 [16]    = "2.8",
49                 [17]    = "2.9",
50                 [18]    = "3.0",
51                 [19]    = "3.1",
52                 [20]    = "3.2",
53                 [21]    = "3.3",
54                 [22]    = "3.4",
55                 [23]    = "3.5",
56                 [24]    = "3.6",
57         };
58         struct mmc_host *host = s->private;
59         struct mmc_ios  *ios = &host->ios;
60         const char *str;
61
62         seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
63         if (host->actual_clock)
64                 seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
65         seq_printf(s, "vdd:\t\t%u ", ios->vdd);
66         if ((1 << ios->vdd) & MMC_VDD_165_195)
67                 seq_printf(s, "(1.65 - 1.95 V)\n");
68         else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1)
69                         && vdd_str[ios->vdd] && vdd_str[ios->vdd + 1])
70                 seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd],
71                                 vdd_str[ios->vdd + 1]);
72         else
73                 seq_printf(s, "(invalid)\n");
74
75         switch (ios->bus_mode) {
76         case MMC_BUSMODE_OPENDRAIN:
77                 str = "open drain";
78                 break;
79         case MMC_BUSMODE_PUSHPULL:
80                 str = "push-pull";
81                 break;
82         default:
83                 str = "invalid";
84                 break;
85         }
86         seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str);
87
88         switch (ios->chip_select) {
89         case MMC_CS_DONTCARE:
90                 str = "don't care";
91                 break;
92         case MMC_CS_HIGH:
93                 str = "active high";
94                 break;
95         case MMC_CS_LOW:
96                 str = "active low";
97                 break;
98         default:
99                 str = "invalid";
100                 break;
101         }
102         seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str);
103
104         switch (ios->power_mode) {
105         case MMC_POWER_OFF:
106                 str = "off";
107                 break;
108         case MMC_POWER_UP:
109                 str = "up";
110                 break;
111         case MMC_POWER_ON:
112                 str = "on";
113                 break;
114         default:
115                 str = "invalid";
116                 break;
117         }
118         seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str);
119         seq_printf(s, "bus width:\t%u (%u bits)\n",
120                         ios->bus_width, 1 << ios->bus_width);
121
122         switch (ios->timing) {
123         case MMC_TIMING_LEGACY:
124                 str = "legacy";
125                 break;
126         case MMC_TIMING_MMC_HS:
127                 str = "mmc high-speed";
128                 break;
129         case MMC_TIMING_SD_HS:
130                 str = "sd high-speed";
131                 break;
132         case MMC_TIMING_UHS_SDR12:
133                 str = "sd uhs SDR12";
134                 break;
135         case MMC_TIMING_UHS_SDR25:
136                 str = "sd uhs SDR25";
137                 break;
138         case MMC_TIMING_UHS_SDR50:
139                 str = "sd uhs SDR50";
140                 break;
141         case MMC_TIMING_UHS_SDR104:
142                 str = "sd uhs SDR104";
143                 break;
144         case MMC_TIMING_UHS_DDR50:
145                 str = "sd uhs DDR50";
146                 break;
147         case MMC_TIMING_MMC_DDR52:
148                 str = "mmc DDR52";
149                 break;
150         case MMC_TIMING_MMC_HS200:
151                 str = "mmc HS200";
152                 break;
153         case MMC_TIMING_MMC_HS400:
154                 str = mmc_card_hs400es(host->card) ?
155                         "mmc HS400 enhanced strobe" : "mmc HS400";
156                 break;
157         default:
158                 str = "invalid";
159                 break;
160         }
161         seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
162
163         switch (ios->signal_voltage) {
164         case MMC_SIGNAL_VOLTAGE_330:
165                 str = "3.30 V";
166                 break;
167         case MMC_SIGNAL_VOLTAGE_180:
168                 str = "1.80 V";
169                 break;
170         case MMC_SIGNAL_VOLTAGE_120:
171                 str = "1.20 V";
172                 break;
173         default:
174                 str = "invalid";
175                 break;
176         }
177         seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
178
179         switch (ios->drv_type) {
180         case MMC_SET_DRIVER_TYPE_A:
181                 str = "driver type A";
182                 break;
183         case MMC_SET_DRIVER_TYPE_B:
184                 str = "driver type B";
185                 break;
186         case MMC_SET_DRIVER_TYPE_C:
187                 str = "driver type C";
188                 break;
189         case MMC_SET_DRIVER_TYPE_D:
190                 str = "driver type D";
191                 break;
192         default:
193                 str = "invalid";
194                 break;
195         }
196         seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
197
198         return 0;
199 }
200 DEFINE_SHOW_ATTRIBUTE(mmc_ios);
201
202 static int mmc_clock_opt_get(void *data, u64 *val)
203 {
204         struct mmc_host *host = data;
205
206         *val = host->ios.clock;
207
208         return 0;
209 }
210
211 static int mmc_clock_opt_set(void *data, u64 val)
212 {
213         struct mmc_host *host = data;
214
215         /* We need this check due to input value is u64 */
216         if (val != 0 && (val > host->f_max || val < host->f_min))
217                 return -EINVAL;
218
219         mmc_claim_host(host);
220         mmc_set_clock(host, (unsigned int) val);
221         mmc_release_host(host);
222
223         return 0;
224 }
225
226 DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
227         "%llu\n");
228
229 static int mmc_err_state_get(void *data, u64 *val)
230 {
231         struct mmc_host *host = data;
232         int i;
233
234         if (!host)
235                 return -EINVAL;
236
237         *val = 0;
238         for (i = 0; i < MMC_ERR_MAX; i++) {
239                 if (host->err_stats[i]) {
240                         *val = 1;
241                         break;
242                 }
243         }
244
245         return 0;
246 }
247
248 DEFINE_DEBUGFS_ATTRIBUTE(mmc_err_state, mmc_err_state_get, NULL, "%llu\n");
249
250 static int mmc_err_stats_show(struct seq_file *file, void *data)
251 {
252         struct mmc_host *host = file->private;
253         const char *desc[MMC_ERR_MAX] = {
254                 [MMC_ERR_CMD_TIMEOUT] = "Command Timeout Occurred",
255                 [MMC_ERR_CMD_CRC] = "Command CRC Errors Occurred",
256                 [MMC_ERR_DAT_TIMEOUT] = "Data Timeout Occurred",
257                 [MMC_ERR_DAT_CRC] = "Data CRC Errors Occurred",
258                 [MMC_ERR_AUTO_CMD] = "Auto-Cmd Error Occurred",
259                 [MMC_ERR_ADMA] = "ADMA Error Occurred",
260                 [MMC_ERR_TUNING] = "Tuning Error Occurred",
261                 [MMC_ERR_CMDQ_RED] = "CMDQ RED Errors",
262                 [MMC_ERR_CMDQ_GCE] = "CMDQ GCE Errors",
263                 [MMC_ERR_CMDQ_ICCE] = "CMDQ ICCE Errors",
264                 [MMC_ERR_REQ_TIMEOUT] = "Request Timedout",
265                 [MMC_ERR_CMDQ_REQ_TIMEOUT] = "CMDQ Request Timedout",
266                 [MMC_ERR_ICE_CFG] = "ICE Config Errors",
267                 [MMC_ERR_CTRL_TIMEOUT] = "Controller Timedout errors",
268                 [MMC_ERR_UNEXPECTED_IRQ] = "Unexpected IRQ errors",
269         };
270         int i;
271
272         for (i = 0; i < MMC_ERR_MAX; i++) {
273                 if (desc[i])
274                         seq_printf(file, "# %s:\t %d\n",
275                                         desc[i], host->err_stats[i]);
276         }
277
278         return 0;
279 }
280
281 static int mmc_err_stats_open(struct inode *inode, struct file *file)
282 {
283         return single_open(file, mmc_err_stats_show, inode->i_private);
284 }
285
286 static ssize_t mmc_err_stats_write(struct file *filp, const char __user *ubuf,
287                                    size_t cnt, loff_t *ppos)
288 {
289         struct mmc_host *host = filp->f_mapping->host->i_private;
290
291         pr_debug("%s: Resetting MMC error statistics\n", __func__);
292         memset(host->err_stats, 0, sizeof(host->err_stats));
293
294         return cnt;
295 }
296
297 static const struct file_operations mmc_err_stats_fops = {
298         .open   = mmc_err_stats_open,
299         .read   = seq_read,
300         .write  = mmc_err_stats_write,
301         .release = single_release,
302 };
303
304 static int mmc_caps_get(void *data, u64 *val)
305 {
306         *val = *(u32 *)data;
307         return 0;
308 }
309
310 static int mmc_caps_set(void *data, u64 val)
311 {
312         u32 *caps = data;
313         u32 diff = *caps ^ val;
314         u32 allowed = MMC_CAP_AGGRESSIVE_PM |
315                       MMC_CAP_SD_HIGHSPEED |
316                       MMC_CAP_MMC_HIGHSPEED |
317                       MMC_CAP_UHS |
318                       MMC_CAP_DDR;
319
320         if (diff & ~allowed)
321                 return -EINVAL;
322
323         *caps = val;
324
325         return 0;
326 }
327
328 static int mmc_caps2_set(void *data, u64 val)
329 {
330         u32 allowed = MMC_CAP2_HSX00_1_8V | MMC_CAP2_HSX00_1_2V;
331         u32 *caps = data;
332         u32 diff = *caps ^ val;
333
334         if (diff & ~allowed)
335                 return -EINVAL;
336
337         *caps = val;
338
339         return 0;
340 }
341
342 DEFINE_DEBUGFS_ATTRIBUTE(mmc_caps_fops, mmc_caps_get, mmc_caps_set,
343                          "0x%08llx\n");
344 DEFINE_DEBUGFS_ATTRIBUTE(mmc_caps2_fops, mmc_caps_get, mmc_caps2_set,
345                          "0x%08llx\n");
346
347 void mmc_add_host_debugfs(struct mmc_host *host)
348 {
349         struct dentry *root;
350
351         root = debugfs_create_dir(mmc_hostname(host), NULL);
352         host->debugfs_root = root;
353
354         debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops);
355         debugfs_create_file("caps", 0600, root, &host->caps, &mmc_caps_fops);
356         debugfs_create_file("caps2", 0600, root, &host->caps2,
357                             &mmc_caps2_fops);
358         debugfs_create_file_unsafe("clock", S_IRUSR | S_IWUSR, root, host,
359                                    &mmc_clock_fops);
360
361         debugfs_create_file_unsafe("err_state", 0600, root, host,
362                             &mmc_err_state);
363         debugfs_create_file("err_stats", 0600, root, host,
364                             &mmc_err_stats_fops);
365
366 #ifdef CONFIG_FAIL_MMC_REQUEST
367         if (fail_request)
368                 setup_fault_attr(&fail_default_attr, fail_request);
369         host->fail_mmc_request = fail_default_attr;
370         fault_create_debugfs_attr("fail_mmc_request", root,
371                                   &host->fail_mmc_request);
372 #endif
373 }
374
375 void mmc_remove_host_debugfs(struct mmc_host *host)
376 {
377         debugfs_remove_recursive(host->debugfs_root);
378 }
379
380 void mmc_add_card_debugfs(struct mmc_card *card)
381 {
382         struct mmc_host *host = card->host;
383         struct dentry   *root;
384
385         if (!host->debugfs_root)
386                 return;
387
388         root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
389         card->debugfs_root = root;
390
391         debugfs_create_x32("state", S_IRUSR, root, &card->state);
392 }
393
394 void mmc_remove_card_debugfs(struct mmc_card *card)
395 {
396         debugfs_remove_recursive(card->debugfs_root);
397         card->debugfs_root = NULL;
398 }