summaryrefslogtreecommitdiffstats
path: root/drivers/mmc/core/debugfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc/core/debugfs.c')
-rw-r--r--drivers/mmc/core/debugfs.c351
1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
new file mode 100644
index 000000000..fe6808771
--- /dev/null
+++ b/drivers/mmc/core/debugfs.c
@@ -0,0 +1,351 @@
+// 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-05 00:22:48 +0000