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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
29static DECLARE_FAULT_ATTR(fail_default_attr);
30static char *fail_request;
31module_param(fail_request, charp, 0);
32MODULE_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. */
37static 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}
200DEFINE_SHOW_ATTRIBUTE(mmc_ios);
201
202static 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
211static 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
226DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
227 "%llu\n");
228
229static 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
248DEFINE_DEBUGFS_ATTRIBUTE(mmc_err_state, mmc_err_state_get, NULL, "%llu\n");
249
250static 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
281static 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
286static 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
297static 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
304static int mmc_caps_get(void *data, u64 *val)
305{
306 *val = *(u32 *)data;
307 return 0;
308}
309
310static 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
328static 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
342DEFINE_DEBUGFS_ATTRIBUTE(mmc_caps_fops, mmc_caps_get, mmc_caps_set,
343 "0x%08llx\n");
344DEFINE_DEBUGFS_ATTRIBUTE(mmc_caps2_fops, mmc_caps_get, mmc_caps2_set,
345 "0x%08llx\n");
346
347void 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
375void mmc_remove_host_debugfs(struct mmc_host *host)
376{
377 debugfs_remove_recursive(host->debugfs_root);
378}
379
380void 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
394void mmc_remove_card_debugfs(struct mmc_card *card)
395{
396 debugfs_remove_recursive(card->debugfs_root);
397 card->debugfs_root = NULL;
398}
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
16#include <linux/mmc/card.h>
17#include <linux/mmc/host.h>
18
19#include "core.h"
20#include "card.h"
21#include "host.h"
22#include "mmc_ops.h"
23
24#ifdef CONFIG_FAIL_MMC_REQUEST
25
26static DECLARE_FAULT_ATTR(fail_default_attr);
27static char *fail_request;
28module_param(fail_request, charp, 0);
29
30#endif /* CONFIG_FAIL_MMC_REQUEST */
31
32/* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
33static int mmc_ios_show(struct seq_file *s, void *data)
34{
35 static const char *vdd_str[] = {
36 [8] = "2.0",
37 [9] = "2.1",
38 [10] = "2.2",
39 [11] = "2.3",
40 [12] = "2.4",
41 [13] = "2.5",
42 [14] = "2.6",
43 [15] = "2.7",
44 [16] = "2.8",
45 [17] = "2.9",
46 [18] = "3.0",
47 [19] = "3.1",
48 [20] = "3.2",
49 [21] = "3.3",
50 [22] = "3.4",
51 [23] = "3.5",
52 [24] = "3.6",
53 };
54 struct mmc_host *host = s->private;
55 struct mmc_ios *ios = &host->ios;
56 const char *str;
57
58 seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
59 if (host->actual_clock)
60 seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
61 seq_printf(s, "vdd:\t\t%u ", ios->vdd);
62 if ((1 << ios->vdd) & MMC_VDD_165_195)
63 seq_printf(s, "(1.65 - 1.95 V)\n");
64 else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1)
65 && vdd_str[ios->vdd] && vdd_str[ios->vdd + 1])
66 seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd],
67 vdd_str[ios->vdd + 1]);
68 else
69 seq_printf(s, "(invalid)\n");
70
71 switch (ios->bus_mode) {
72 case MMC_BUSMODE_OPENDRAIN:
73 str = "open drain";
74 break;
75 case MMC_BUSMODE_PUSHPULL:
76 str = "push-pull";
77 break;
78 default:
79 str = "invalid";
80 break;
81 }
82 seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str);
83
84 switch (ios->chip_select) {
85 case MMC_CS_DONTCARE:
86 str = "don't care";
87 break;
88 case MMC_CS_HIGH:
89 str = "active high";
90 break;
91 case MMC_CS_LOW:
92 str = "active low";
93 break;
94 default:
95 str = "invalid";
96 break;
97 }
98 seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str);
99
100 switch (ios->power_mode) {
101 case MMC_POWER_OFF:
102 str = "off";
103 break;
104 case MMC_POWER_UP:
105 str = "up";
106 break;
107 case MMC_POWER_ON:
108 str = "on";
109 break;
110 default:
111 str = "invalid";
112 break;
113 }
114 seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str);
115 seq_printf(s, "bus width:\t%u (%u bits)\n",
116 ios->bus_width, 1 << ios->bus_width);
117
118 switch (ios->timing) {
119 case MMC_TIMING_LEGACY:
120 str = "legacy";
121 break;
122 case MMC_TIMING_MMC_HS:
123 str = "mmc high-speed";
124 break;
125 case MMC_TIMING_SD_HS:
126 str = "sd high-speed";
127 break;
128 case MMC_TIMING_UHS_SDR12:
129 str = "sd uhs SDR12";
130 break;
131 case MMC_TIMING_UHS_SDR25:
132 str = "sd uhs SDR25";
133 break;
134 case MMC_TIMING_UHS_SDR50:
135 str = "sd uhs SDR50";
136 break;
137 case MMC_TIMING_UHS_SDR104:
138 str = "sd uhs SDR104";
139 break;
140 case MMC_TIMING_UHS_DDR50:
141 str = "sd uhs DDR50";
142 break;
143 case MMC_TIMING_MMC_DDR52:
144 str = "mmc DDR52";
145 break;
146 case MMC_TIMING_MMC_HS200:
147 str = "mmc HS200";
148 break;
149 case MMC_TIMING_MMC_HS400:
150 str = mmc_card_hs400es(host->card) ?
151 "mmc HS400 enhanced strobe" : "mmc HS400";
152 break;
153 default:
154 str = "invalid";
155 break;
156 }
157 seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
158
159 switch (ios->signal_voltage) {
160 case MMC_SIGNAL_VOLTAGE_330:
161 str = "3.30 V";
162 break;
163 case MMC_SIGNAL_VOLTAGE_180:
164 str = "1.80 V";
165 break;
166 case MMC_SIGNAL_VOLTAGE_120:
167 str = "1.20 V";
168 break;
169 default:
170 str = "invalid";
171 break;
172 }
173 seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
174
175 switch (ios->drv_type) {
176 case MMC_SET_DRIVER_TYPE_A:
177 str = "driver type A";
178 break;
179 case MMC_SET_DRIVER_TYPE_B:
180 str = "driver type B";
181 break;
182 case MMC_SET_DRIVER_TYPE_C:
183 str = "driver type C";
184 break;
185 case MMC_SET_DRIVER_TYPE_D:
186 str = "driver type D";
187 break;
188 default:
189 str = "invalid";
190 break;
191 }
192 seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
193
194 return 0;
195}
196DEFINE_SHOW_ATTRIBUTE(mmc_ios);
197
198static int mmc_clock_opt_get(void *data, u64 *val)
199{
200 struct mmc_host *host = data;
201
202 *val = host->ios.clock;
203
204 return 0;
205}
206
207static int mmc_clock_opt_set(void *data, u64 val)
208{
209 struct mmc_host *host = data;
210
211 /* We need this check due to input value is u64 */
212 if (val != 0 && (val > host->f_max || val < host->f_min))
213 return -EINVAL;
214
215 mmc_claim_host(host);
216 mmc_set_clock(host, (unsigned int) val);
217 mmc_release_host(host);
218
219 return 0;
220}
221
222DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
223 "%llu\n");
224
225void mmc_add_host_debugfs(struct mmc_host *host)
226{
227 struct dentry *root;
228
229 root = debugfs_create_dir(mmc_hostname(host), NULL);
230 host->debugfs_root = root;
231
232 debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops);
233 debugfs_create_x32("caps", S_IRUSR, root, &host->caps);
234 debugfs_create_x32("caps2", S_IRUSR, root, &host->caps2);
235 debugfs_create_file_unsafe("clock", S_IRUSR | S_IWUSR, root, host,
236 &mmc_clock_fops);
237
238#ifdef CONFIG_FAIL_MMC_REQUEST
239 if (fail_request)
240 setup_fault_attr(&fail_default_attr, fail_request);
241 host->fail_mmc_request = fail_default_attr;
242 fault_create_debugfs_attr("fail_mmc_request", root,
243 &host->fail_mmc_request);
244#endif
245}
246
247void mmc_remove_host_debugfs(struct mmc_host *host)
248{
249 debugfs_remove_recursive(host->debugfs_root);
250}
251
252void mmc_add_card_debugfs(struct mmc_card *card)
253{
254 struct mmc_host *host = card->host;
255 struct dentry *root;
256
257 if (!host->debugfs_root)
258 return;
259
260 root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
261 card->debugfs_root = root;
262
263 debugfs_create_x32("state", S_IRUSR, root, &card->state);
264}
265
266void mmc_remove_card_debugfs(struct mmc_card *card)
267{
268 debugfs_remove_recursive(card->debugfs_root);
269 card->debugfs_root = NULL;
270}