--- /dev/null
+/*
+ * 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
+ */
+
+#include <linux/export.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "sdio_cis.h"
+#include "bus.h"
+
+#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
+
+static ssize_t type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mmc_card *card = mmc_dev_to_card(dev);
+
+ switch (card->type) {
+ case MMC_TYPE_MMC:
+ return sprintf(buf, "MMC\n");
+ case MMC_TYPE_SD:
+ 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 attribute *mmc_dev_attrs[] = {
+ &dev_attr_type.attr,
+ NULL,
+};
+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)
+{
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ const char *type;
+ int retval = 0;
+
+ switch (card->type) {
+ case MMC_TYPE_MMC:
+ type = "MMC";
+ break;
+ case MMC_TYPE_SD:
+ type = "SD";
+ break;
+ case MMC_TYPE_SDIO:
+ type = "SDIO";
+ break;
+ case MMC_TYPE_SD_COMBO:
+ type = "SDcombo";
+ break;
+ default:
+ type = NULL;
+ }
+
+ if (type) {
+ retval = add_uevent_var(env, "MMC_TYPE=%s", type);
+ if (retval)
+ return retval;
+ }
+
+ 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;
+}
+
+static int mmc_bus_probe(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = mmc_dev_to_card(dev);
+
+ return drv->probe(card);
+}
+
+static int 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)
+{
+ 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->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_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+ int ret;
+
+ ret = pm_generic_suspend(dev);
+ if (ret)
+ return ret;
+
+ ret = host->bus_ops->suspend(host);
+ return ret;
+}
+
+static int mmc_bus_resume(struct device *dev)
+{
+ 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);
+
+ ret = pm_generic_resume(dev);
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+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);
+}
+#endif /* !CONFIG_PM */
+
+static const struct dev_pm_ops mmc_bus_pm_ops = {
+ SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
+};
+
+static 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,
+ .shutdown = mmc_bus_shutdown,
+ .pm = &mmc_bus_pm_ops,
+};
+
+int mmc_register_bus(void)
+{
+ return bus_register(&mmc_bus_type);
+}
+
+void mmc_unregister_bus(void)
+{
+ bus_unregister(&mmc_bus_type);
+}
+
+/**
+ * mmc_register_driver - register a media driver
+ * @drv: MMC media driver
+ */
+int mmc_register_driver(struct mmc_driver *drv)
+{
+ drv->drv.bus = &mmc_bus_type;
+ return driver_register(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_register_driver);
+
+/**
+ * mmc_unregister_driver - unregister a media driver
+ * @drv: MMC media driver
+ */
+void mmc_unregister_driver(struct mmc_driver *drv)
+{
+ drv->drv.bus = &mmc_bus_type;
+ driver_unregister(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_unregister_driver);
+
+static void mmc_release_card(struct device *dev)
+{
+ struct mmc_card *card = mmc_dev_to_card(dev);
+
+ sdio_free_common_cis(card);
+
+ kfree(card->info);
+
+ kfree(card);
+}
+
+/*
+ * 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 *card;
+
+ card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
+ if (!card)
+ return ERR_PTR(-ENOMEM);
+
+ card->host = host;
+
+ device_initialize(&card->dev);
+
+ card->dev.parent = mmc_classdev(host);
+ card->dev.bus = &mmc_bus_type;
+ card->dev.release = mmc_release_card;
+ card->dev.type = type;
+
+ return card;
+}
+
+/*
+ * Register a new MMC card with the driver model.
+ */
+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 ",
+ };
+
+
+ dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
+
+ switch (card->type) {
+ case MMC_TYPE_MMC:
+ type = "MMC";
+ break;
+ case MMC_TYPE_SD:
+ type = "SD";
+ 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)) {
+ 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 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_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);
+
+ card->dev.of_node = mmc_of_find_child_device(card->host, 0);
+
+ ret = device_add(&card->dev);
+ if (ret)
+ return ret;
+
+ mmc_card_set_present(card);
+
+ return 0;
+}
+
+/*
+ * Unregister a new MMC card with the driver model, and
+ * (eventually) free it.
+ */
+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)) {
+ pr_info("%s: SPI card removed\n",
+ mmc_hostname(card->host));
+ } else {
+ pr_info("%s: card %04x removed\n",
+ mmc_hostname(card->host), card->rca);
+ }
+ device_del(&card->dev);
+ of_node_put(card->dev.of_node);
+ }
+
+ put_device(&card->dev);
+}
+
Code Review / kvmfornfv.git / blobdiff