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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/mmc/core/debugfs.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mmc/core/debugfs.c')
-rw-r--r-- | drivers/mmc/core/debugfs.c | 351 |
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 0000000000..2c97b94aab --- /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 = 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; +} |