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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 | // SPDX-License-Identifier: GPL-2.0-only /* * Debugfs support for hosts and cards * * Copyright (C) 2008 Atmel Corporation */ #include <linux/moduleparam.h> #include <linux/export.h> #include <linux/debugfs.h> #include <linux/fs.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/stat.h> #include <linux/fault-inject.h> #include <linux/mmc/card.h> #include <linux/mmc/host.h> #include "core.h" #include "card.h" #include "host.h" #include "mmc_ops.h" #ifdef CONFIG_FAIL_MMC_REQUEST static DECLARE_FAULT_ATTR(fail_default_attr); static char *fail_request; module_param(fail_request, charp, 0); MODULE_PARM_DESC(fail_request, "default fault injection attributes"); #endif /* CONFIG_FAIL_MMC_REQUEST */ /* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */ static int mmc_ios_show(struct seq_file *s, void *data) { static const char *vdd_str[] = { [8] = "2.0", [9] = "2.1", [10] = "2.2", [11] = "2.3", [12] = "2.4", [13] = "2.5", [14] = "2.6", [15] = "2.7", [16] = "2.8", [17] = "2.9", [18] = "3.0", [19] = "3.1", [20] = "3.2", [21] = "3.3", [22] = "3.4", [23] = "3.5", [24] = "3.6", }; struct mmc_host *host = s->private; struct mmc_ios *ios = &host->ios; const char *str; seq_printf(s, "clock:\t\t%u Hz\n", ios->clock); if (host->actual_clock) seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock); seq_printf(s, "vdd:\t\t%u ", ios->vdd); if ((1 << ios->vdd) & MMC_VDD_165_195) seq_printf(s, "(1.65 - 1.95 V)\n"); else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1) && vdd_str[ios->vdd] && vdd_str[ios->vdd + 1]) seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd], vdd_str[ios->vdd + 1]); else seq_printf(s, "(invalid)\n"); switch (ios->bus_mode) { case MMC_BUSMODE_OPENDRAIN: str = "open drain"; break; case MMC_BUSMODE_PUSHPULL: str = "push-pull"; break; default: str = "invalid"; break; } seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str); switch (ios->chip_select) { case MMC_CS_DONTCARE: str = "don't care"; break; case MMC_CS_HIGH: str = "active high"; break; case MMC_CS_LOW: str = "active low"; break; default: str = "invalid"; break; } seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str); switch (ios->power_mode) { case MMC_POWER_OFF: str = "off"; break; case MMC_POWER_UP: str = "up"; break; case MMC_POWER_ON: str = "on"; break; default: str = "invalid"; break; } seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str); seq_printf(s, "bus width:\t%u (%u bits)\n", ios->bus_width, 1 << ios->bus_width); switch (ios->timing) { case MMC_TIMING_LEGACY: str = "legacy"; break; case MMC_TIMING_MMC_HS: str = "mmc high-speed"; break; case MMC_TIMING_SD_HS: str = "sd high-speed"; break; case MMC_TIMING_UHS_SDR12: str = "sd uhs SDR12"; break; case MMC_TIMING_UHS_SDR25: str = "sd uhs SDR25"; break; case MMC_TIMING_UHS_SDR50: str = "sd uhs SDR50"; break; case MMC_TIMING_UHS_SDR104: str = "sd uhs SDR104"; break; case MMC_TIMING_UHS_DDR50: str = "sd uhs DDR50"; break; case MMC_TIMING_MMC_DDR52: str = "mmc DDR52"; break; case MMC_TIMING_MMC_HS200: str = "mmc HS200"; break; case MMC_TIMING_MMC_HS400: str = mmc_card_hs400es(host->card) ? "mmc HS400 enhanced strobe" : "mmc HS400"; break; default: str = "invalid"; break; } seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str); switch (ios->signal_voltage) { case MMC_SIGNAL_VOLTAGE_330: str = "3.30 V"; break; case MMC_SIGNAL_VOLTAGE_180: str = "1.80 V"; break; case MMC_SIGNAL_VOLTAGE_120: str = "1.20 V"; break; default: str = "invalid"; break; } seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str); switch (ios->drv_type) { case MMC_SET_DRIVER_TYPE_A: str = "driver type A"; break; case MMC_SET_DRIVER_TYPE_B: str = "driver type B"; break; case MMC_SET_DRIVER_TYPE_C: str = "driver type C"; break; case MMC_SET_DRIVER_TYPE_D: str = "driver type D"; break; default: str = "invalid"; break; } seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str); return 0; } DEFINE_SHOW_ATTRIBUTE(mmc_ios); static int mmc_clock_opt_get(void *data, u64 *val) { struct mmc_host *host = data; *val = host->ios.clock; return 0; } static int mmc_clock_opt_set(void *data, u64 val) { struct mmc_host *host = data; /* We need this check due to input value is u64 */ if (val != 0 && (val > host->f_max || val < host->f_min)) return -EINVAL; mmc_claim_host(host); mmc_set_clock(host, (unsigned int) val); mmc_release_host(host); return 0; } DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set, "%llu\n"); static int mmc_err_state_get(void *data, u64 *val) { struct mmc_host *host = data; int i; if (!host) return -EINVAL; *val = 0; for (i = 0; i < MMC_ERR_MAX; i++) { if (host->err_stats[i]) { *val = 1; break; } } return 0; } DEFINE_DEBUGFS_ATTRIBUTE(mmc_err_state, mmc_err_state_get, NULL, "%llu\n"); static int mmc_err_stats_show(struct seq_file *file, void *data) { struct mmc_host *host = (struct mmc_host *)file->private; const char *desc[MMC_ERR_MAX] = { [MMC_ERR_CMD_TIMEOUT] = "Command Timeout Occurred", [MMC_ERR_CMD_CRC] = "Command CRC Errors Occurred", [MMC_ERR_DAT_TIMEOUT] = "Data Timeout Occurred", [MMC_ERR_DAT_CRC] = "Data CRC Errors Occurred", [MMC_ERR_AUTO_CMD] = "Auto-Cmd Error Occurred", [MMC_ERR_ADMA] = "ADMA Error Occurred", [MMC_ERR_TUNING] = "Tuning Error Occurred", [MMC_ERR_CMDQ_RED] = "CMDQ RED Errors", [MMC_ERR_CMDQ_GCE] = "CMDQ GCE Errors", [MMC_ERR_CMDQ_ICCE] = "CMDQ ICCE Errors", [MMC_ERR_REQ_TIMEOUT] = "Request Timedout", [MMC_ERR_CMDQ_REQ_TIMEOUT] = "CMDQ Request Timedout", [MMC_ERR_ICE_CFG] = "ICE Config Errors", [MMC_ERR_CTRL_TIMEOUT] = "Controller Timedout errors", [MMC_ERR_UNEXPECTED_IRQ] = "Unexpected IRQ errors", }; int i; for (i = 0; i < MMC_ERR_MAX; i++) { if (desc[i]) seq_printf(file, "# %s:\t %d\n", desc[i], host->err_stats[i]); } return 0; } static int mmc_err_stats_open(struct inode *inode, struct file *file) { return single_open(file, mmc_err_stats_show, inode->i_private); } static ssize_t mmc_err_stats_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos) { struct mmc_host *host = filp->f_mapping->host->i_private; pr_debug("%s: Resetting MMC error statistics\n", __func__); memset(host->err_stats, 0, sizeof(host->err_stats)); return cnt; } static const struct file_operations mmc_err_stats_fops = { .open = mmc_err_stats_open, .read = seq_read, .write = mmc_err_stats_write, .release = single_release, }; void mmc_add_host_debugfs(struct mmc_host *host) { struct dentry *root; root = debugfs_create_dir(mmc_hostname(host), NULL); host->debugfs_root = root; debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops); debugfs_create_x32("caps", S_IRUSR, root, &host->caps); debugfs_create_x32("caps2", S_IRUSR, root, &host->caps2); debugfs_create_file_unsafe("clock", S_IRUSR | S_IWUSR, root, host, &mmc_clock_fops); debugfs_create_file_unsafe("err_state", 0600, root, host, &mmc_err_state); debugfs_create_file("err_stats", 0600, root, host, &mmc_err_stats_fops); #ifdef CONFIG_FAIL_MMC_REQUEST if (fail_request) setup_fault_attr(&fail_default_attr, fail_request); host->fail_mmc_request = fail_default_attr; fault_create_debugfs_attr("fail_mmc_request", root, &host->fail_mmc_request); #endif } void mmc_remove_host_debugfs(struct mmc_host *host) { debugfs_remove_recursive(host->debugfs_root); } void mmc_add_card_debugfs(struct mmc_card *card) { struct mmc_host *host = card->host; struct dentry *root; if (!host->debugfs_root) return; root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root); card->debugfs_root = root; debugfs_create_x32("state", S_IRUSR, root, &card->state); } void mmc_remove_card_debugfs(struct mmc_card *card) { debugfs_remove_recursive(card->debugfs_root); card->debugfs_root = NULL; } |