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path: root/drivers/mmc/core/bus.c
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Diffstat (limited to 'drivers/mmc/core/bus.c')
-rw-r--r--drivers/mmc/core/bus.c137
1 files changed, 84 insertions, 53 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index fc92c6c1c9a4..ec4f3462bf80 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/drivers/mmc/core/bus.c
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
* Copyright (C) 2007 Pierre Ossman
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* MMC card bus driver model
*/
@@ -18,9 +15,11 @@
#include <linux/stat.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
#include "core.h"
#include "card.h"
@@ -37,13 +36,13 @@ static ssize_t type_show(struct device *dev,
switch (card->type) {
case MMC_TYPE_MMC:
- return sprintf(buf, "MMC\n");
+ return sysfs_emit(buf, "MMC\n");
case MMC_TYPE_SD:
- return sprintf(buf, "SD\n");
+ return sysfs_emit(buf, "SD\n");
case MMC_TYPE_SDIO:
- return sprintf(buf, "SDIO\n");
+ return sysfs_emit(buf, "SDIO\n");
case MMC_TYPE_SD_COMBO:
- return sprintf(buf, "SDcombo\n");
+ return sysfs_emit(buf, "SDcombo\n");
default:
return -EFAULT;
}
@@ -56,21 +55,12 @@ static struct attribute *mmc_dev_attrs[] = {
};
ATTRIBUTE_GROUPS(mmc_dev);
-/*
- * This currently matches any MMC driver to any MMC card - drivers
- * themselves make the decision whether to drive this card in their
- * probe method.
- */
-static int mmc_bus_match(struct device *dev, struct device_driver *drv)
-{
- return 1;
-}
-
static int
-mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+mmc_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct mmc_card *card = mmc_dev_to_card(dev);
+ const struct mmc_card *card = mmc_dev_to_card(dev);
const char *type;
+ unsigned int i;
int retval = 0;
switch (card->type) {
@@ -96,6 +86,31 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
return retval;
}
+ if (mmc_card_sdio(card) || mmc_card_sd_combo(card)) {
+ retval = add_uevent_var(env, "SDIO_ID=%04X:%04X",
+ card->cis.vendor, card->cis.device);
+ if (retval)
+ return retval;
+
+ retval = add_uevent_var(env, "SDIO_REVISION=%u.%u",
+ card->major_rev, card->minor_rev);
+ if (retval)
+ return retval;
+
+ for (i = 0; i < card->num_info; i++) {
+ retval = add_uevent_var(env, "SDIO_INFO%u=%s", i+1, card->info[i]);
+ if (retval)
+ return retval;
+ }
+ }
+
+ /*
+ * SDIO (non-combo) cards are not handled by mmc_block driver and do not
+ * have accessible CID register which used by mmc_card_name() function.
+ */
+ if (mmc_card_sdio(card))
+ return 0;
+
retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
if (retval)
return retval;
@@ -117,14 +132,12 @@ static int mmc_bus_probe(struct device *dev)
return drv->probe(card);
}
-static int mmc_bus_remove(struct device *dev)
+static void mmc_bus_remove(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
struct mmc_card *card = mmc_dev_to_card(dev);
drv->remove(card);
-
- return 0;
}
static void mmc_bus_shutdown(struct device *dev)
@@ -137,6 +150,8 @@ static void mmc_bus_shutdown(struct device *dev)
if (dev->driver && drv->shutdown)
drv->shutdown(card);
+ __mmc_stop_host(host);
+
if (host->bus_ops->shutdown) {
ret = host->bus_ops->shutdown(host);
if (ret)
@@ -202,10 +217,9 @@ static const struct dev_pm_ops mmc_bus_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
};
-static struct bus_type mmc_bus_type = {
+static const struct bus_type mmc_bus_type = {
.name = "mmc",
.dev_groups = mmc_dev_groups,
- .match = mmc_bus_match,
.uevent = mmc_bus_uevent,
.probe = mmc_bus_probe,
.remove = mmc_bus_remove,
@@ -261,7 +275,7 @@ static void mmc_release_card(struct device *dev)
/*
* Allocate and initialise a new MMC card structure.
*/
-struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
+struct mmc_card *mmc_alloc_card(struct mmc_host *host, const struct device_type *type)
{
struct mmc_card *card;
@@ -288,6 +302,7 @@ int mmc_add_card(struct mmc_card *card)
{
int ret;
const char *type;
+ const char *speed_mode = "";
const char *uhs_bus_speed_mode = "";
static const char *const uhs_speeds[] = {
[UHS_SDR12_BUS_SPEED] = "SDR12 ",
@@ -299,6 +314,9 @@ int mmc_add_card(struct mmc_card *card)
dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
+ dev_set_removable(&card->dev,
+ mmc_card_is_removable(card->host) ?
+ DEVICE_REMOVABLE : DEVICE_FIXED);
switch (card->type) {
case MMC_TYPE_MMC:
@@ -307,7 +325,9 @@ int mmc_add_card(struct mmc_card *card)
case MMC_TYPE_SD:
type = "SD";
if (mmc_card_blockaddr(card)) {
- if (mmc_card_ext_capacity(card))
+ if (mmc_card_ult_capacity(card))
+ type = "SDUC";
+ else if (mmc_card_ext_capacity(card))
type = "SDXC";
else
type = "SDHC";
@@ -326,31 +346,34 @@ int mmc_add_card(struct mmc_card *card)
break;
}
+ if (mmc_card_hs(card))
+ speed_mode = "high speed ";
+ else if (mmc_card_uhs(card))
+ speed_mode = "UHS-I speed ";
+ else if (mmc_card_uhs2(card->host))
+ speed_mode = "UHS-II speed ";
+ else if (mmc_card_ddr52(card))
+ speed_mode = "high speed DDR ";
+ else if (mmc_card_hs200(card))
+ speed_mode = "HS200 ";
+ else if (mmc_card_hs400es(card))
+ speed_mode = "HS400 Enhanced strobe ";
+ else if (mmc_card_hs400(card))
+ speed_mode = "HS400 ";
+
if (mmc_card_uhs(card) &&
(card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
- if (mmc_host_is_spi(card->host)) {
- pr_info("%s: new %s%s%s card on SPI\n",
- mmc_hostname(card->host),
- mmc_card_hs(card) ? "high speed " : "",
- mmc_card_ddr52(card) ? "DDR " : "",
- type);
- } else {
- pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
- mmc_hostname(card->host),
- mmc_card_uhs(card) ? "ultra high speed " :
- (mmc_card_hs(card) ? "high speed " : ""),
- mmc_card_hs400(card) ? "HS400 " :
- (mmc_card_hs200(card) ? "HS200 " : ""),
- mmc_card_hs400es(card) ? "Enhanced strobe " : "",
- mmc_card_ddr52(card) ? "DDR " : "",
+ if (mmc_host_is_spi(card->host))
+ pr_info("%s: new %s%s card on SPI\n",
+ mmc_hostname(card->host), speed_mode, type);
+ else
+ pr_info("%s: new %s%s%s card at address %04x\n",
+ mmc_hostname(card->host), speed_mode,
uhs_bus_speed_mode, type, card->rca);
- }
-#ifdef CONFIG_DEBUG_FS
mmc_add_card_debugfs(card);
-#endif
card->dev.of_node = mmc_of_find_child_device(card->host, 0);
device_enable_async_suspend(&card->dev);
@@ -361,6 +384,14 @@ int mmc_add_card(struct mmc_card *card)
mmc_card_set_present(card);
+ /*
+ * Register for undervoltage notification if the card supports
+ * power-off notification, enabling emergency shutdowns.
+ */
+ if (mmc_card_mmc(card) &&
+ card->ext_csd.power_off_notification == EXT_CSD_POWER_ON)
+ mmc_regulator_register_undervoltage_notifier(card->host);
+
return 0;
}
@@ -372,14 +403,10 @@ void mmc_remove_card(struct mmc_card *card)
{
struct mmc_host *host = card->host;
-#ifdef CONFIG_DEBUG_FS
- mmc_remove_card_debugfs(card);
-#endif
+ if (mmc_card_present(card))
+ mmc_regulator_unregister_undervoltage_notifier(host);
- if (host->cqe_enabled) {
- host->cqe_ops->cqe_disable(host);
- host->cqe_enabled = false;
- }
+ mmc_remove_card_debugfs(card);
if (mmc_card_present(card)) {
if (mmc_host_is_spi(card->host)) {
@@ -393,6 +420,10 @@ void mmc_remove_card(struct mmc_card *card)
of_node_put(card->dev.of_node);
}
+ if (host->cqe_enabled) {
+ host->cqe_ops->cqe_disable(host);
+ host->cqe_enabled = false;
+ }
+
put_device(&card->dev);
}
-
generated by cgit (git 2.34.1) at 2025-12-24 23:32:56 +0000