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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.c182
1 files changed, 149 insertions, 33 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index fd95b18e988..d2dbf02022b 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -11,8 +11,12 @@
* MMC card bus driver model
*/
+#include <linux/export.h>
#include <linux/device.h>
#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/pm_runtime.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -21,13 +25,12 @@
#include "sdio_cis.h"
#include "bus.h"
-#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
-static ssize_t mmc_type_show(struct device *dev,
+static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct mmc_card *card = dev_to_mmc_card(dev);
+ struct mmc_card *card = mmc_dev_to_card(dev);
switch (card->type) {
case MMC_TYPE_MMC:
@@ -36,15 +39,19 @@ static ssize_t mmc_type_show(struct device *dev,
return sprintf(buf, "SD\n");
case MMC_TYPE_SDIO:
return sprintf(buf, "SDIO\n");
+ case MMC_TYPE_SD_COMBO:
+ return sprintf(buf, "SDcombo\n");
default:
return -EFAULT;
}
}
+static DEVICE_ATTR_RO(type);
-static struct device_attribute mmc_dev_attrs[] = {
- __ATTR(type, S_IRUGO, mmc_type_show, NULL),
- __ATTR_NULL,
+static struct attribute *mmc_dev_attrs[] = {
+ &dev_attr_type.attr,
+ NULL,
};
+ATTRIBUTE_GROUPS(mmc_dev);
/*
* This currently matches any MMC driver to any MMC card - drivers
@@ -59,7 +66,7 @@ static int mmc_bus_match(struct device *dev, struct device_driver *drv)
static int
mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct mmc_card *card = dev_to_mmc_card(dev);
+ struct mmc_card *card = mmc_dev_to_card(dev);
const char *type;
int retval = 0;
@@ -73,6 +80,9 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
case MMC_TYPE_SDIO:
type = "SDIO";
break;
+ case MMC_TYPE_SD_COMBO:
+ type = "SDcombo";
+ break;
default:
type = NULL;
}
@@ -84,6 +94,14 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
}
retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
+ if (retval)
+ return retval;
+
+ /*
+ * Request the mmc_block device. Note: that this is a direct request
+ * for the module it carries no information as to what is inserted.
+ */
+ retval = add_uevent_var(env, "MODALIAS=mmc:block");
return retval;
}
@@ -91,7 +109,7 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
static int mmc_bus_probe(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
+ struct mmc_card *card = mmc_dev_to_card(dev);
return drv->probe(card);
}
@@ -99,44 +117,108 @@ static int mmc_bus_probe(struct device *dev)
static int mmc_bus_remove(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
+ struct mmc_card *card = mmc_dev_to_card(dev);
drv->remove(card);
return 0;
}
-static int mmc_bus_suspend(struct device *dev, pm_message_t state)
+static void mmc_bus_shutdown(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
- int ret = 0;
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+ int ret;
+
+ if (dev->driver && drv->shutdown)
+ drv->shutdown(card);
+
+ if (host->bus_ops->shutdown) {
+ ret = host->bus_ops->shutdown(host);
+ if (ret)
+ pr_warn("%s: error %d during shutdown\n",
+ mmc_hostname(host), ret);
+ }
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mmc_bus_suspend(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+ int ret;
- if (dev->driver && drv->suspend)
- ret = drv->suspend(card, state);
+ if (dev->driver && drv->suspend) {
+ ret = drv->suspend(card);
+ if (ret)
+ return ret;
+ }
+
+ ret = host->bus_ops->suspend(host);
return ret;
}
static int mmc_bus_resume(struct device *dev)
{
struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
- int ret = 0;
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+ int ret;
+
+ ret = host->bus_ops->resume(host);
+ if (ret)
+ pr_warn("%s: error %d during resume (card was removed?)\n",
+ mmc_hostname(host), ret);
if (dev->driver && drv->resume)
ret = drv->resume(card);
+
return ret;
}
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+
+static int mmc_runtime_suspend(struct device *dev)
+{
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+
+ return host->bus_ops->runtime_suspend(host);
+}
+
+static int mmc_runtime_resume(struct device *dev)
+{
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+
+ return host->bus_ops->runtime_resume(host);
+}
+
+static int mmc_runtime_idle(struct device *dev)
+{
+ return 0;
+}
+
+#endif /* !CONFIG_PM_RUNTIME */
+
+static const struct dev_pm_ops mmc_bus_pm_ops = {
+ SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume,
+ mmc_runtime_idle)
+ SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
+};
static struct bus_type mmc_bus_type = {
.name = "mmc",
- .dev_attrs = mmc_dev_attrs,
+ .dev_groups = mmc_dev_groups,
.match = mmc_bus_match,
.uevent = mmc_bus_uevent,
.probe = mmc_bus_probe,
.remove = mmc_bus_remove,
- .suspend = mmc_bus_suspend,
- .resume = mmc_bus_resume,
+ .shutdown = mmc_bus_shutdown,
+ .pm = &mmc_bus_pm_ops,
};
int mmc_register_bus(void)
@@ -175,12 +257,11 @@ EXPORT_SYMBOL(mmc_unregister_driver);
static void mmc_release_card(struct device *dev)
{
- struct mmc_card *card = dev_to_mmc_card(dev);
+ struct mmc_card *card = mmc_dev_to_card(dev);
sdio_free_common_cis(card);
- if (card->info)
- kfree(card->info);
+ kfree(card->info);
kfree(card);
}
@@ -215,9 +296,17 @@ int mmc_add_card(struct mmc_card *card)
{
int ret;
const char *type;
+ const char *uhs_bus_speed_mode = "";
+ static const char *const uhs_speeds[] = {
+ [UHS_SDR12_BUS_SPEED] = "SDR12 ",
+ [UHS_SDR25_BUS_SPEED] = "SDR25 ",
+ [UHS_SDR50_BUS_SPEED] = "SDR50 ",
+ [UHS_SDR104_BUS_SPEED] = "SDR104 ",
+ [UHS_DDR50_BUS_SPEED] = "DDR50 ",
+ };
+
- snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
- "%s:%04x", mmc_hostname(card->host), card->rca);
+ dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
switch (card->type) {
case MMC_TYPE_MMC:
@@ -225,29 +314,52 @@ int mmc_add_card(struct mmc_card *card)
break;
case MMC_TYPE_SD:
type = "SD";
- if (mmc_card_blockaddr(card))
- type = "SDHC";
+ if (mmc_card_blockaddr(card)) {
+ if (mmc_card_ext_capacity(card))
+ type = "SDXC";
+ else
+ type = "SDHC";
+ }
break;
case MMC_TYPE_SDIO:
type = "SDIO";
break;
+ case MMC_TYPE_SD_COMBO:
+ type = "SD-combo";
+ if (mmc_card_blockaddr(card))
+ type = "SDHC-combo";
+ break;
default:
type = "?";
break;
}
+ 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)) {
- printk(KERN_INFO "%s: new %s%s card on SPI\n",
+ pr_info("%s: new %s%s%s card on SPI\n",
mmc_hostname(card->host),
- mmc_card_highspeed(card) ? "high speed " : "",
+ mmc_card_hs(card) ? "high speed " : "",
+ mmc_card_ddr52(card) ? "DDR " : "",
type);
} else {
- printk(KERN_INFO "%s: new %s%s card at address %04x\n",
+ pr_info("%s: new %s%s%s%s%s card at address %04x\n",
mmc_hostname(card->host),
- mmc_card_highspeed(card) ? "high speed " : "",
- type, card->rca);
+ 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_ddr52(card) ? "DDR " : "",
+ uhs_bus_speed_mode, type, card->rca);
}
+#ifdef CONFIG_DEBUG_FS
+ mmc_add_card_debugfs(card);
+#endif
+ mmc_init_context_info(card->host);
+
ret = device_add(&card->dev);
if (ret)
return ret;
@@ -263,12 +375,16 @@ int mmc_add_card(struct mmc_card *card)
*/
void mmc_remove_card(struct mmc_card *card)
{
+#ifdef CONFIG_DEBUG_FS
+ mmc_remove_card_debugfs(card);
+#endif
+
if (mmc_card_present(card)) {
if (mmc_host_is_spi(card->host)) {
- printk(KERN_INFO "%s: SPI card removed\n",
+ pr_info("%s: SPI card removed\n",
mmc_hostname(card->host));
} else {
- printk(KERN_INFO "%s: card %04x removed\n",
+ pr_info("%s: card %04x removed\n",
mmc_hostname(card->host), card->rca);
}
device_del(&card->dev);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 07:13:47 +0000