From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/mmc/core/bus.c | 397 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 397 insertions(+) create mode 100644 drivers/mmc/core/bus.c (limited to 'drivers/mmc/core/bus.c') diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c new file mode 100644 index 000000000..941f39ca4 --- /dev/null +++ b/drivers/mmc/core/bus.c @@ -0,0 +1,397 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "core.h" +#include "card.h" +#include "host.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); + if (ret) + pm_generic_resume(dev); + + 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%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 " : "", + 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); + + 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) +{ + struct mmc_host *host = card->host; + +#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); + } + + if (host->cqe_enabled) { + host->cqe_ops->cqe_disable(host); + host->cqe_enabled = false; + } + + put_device(&card->dev); +} -- cgit v1.2.3