diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-10 14:57:52 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-10 14:57:52 -0700 |
commit | 4c75f7416f51b0c6855952467a5db04f9c598f09 (patch) | |
tree | dbe06f7e69d68cf99b20567577c9c5488e4e1e8c /drivers/mmc/core | |
parent | 6ed911fb04886c5510a41cd89203b931b1c5d261 (diff) | |
parent | ed99c541e0a15281c57530d54a4a5e3272f74fb9 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
mmc: at91_mci: fix hanging and rework to match flowcharts
mmc: at91_mci typo
sdhci: Fix "Unexpected interrupt" handling
mmc: fix silly copy-and-paste error
mmc: move layer init and workqueue to core file
mmc: refactor host class handling
mmc: refactor bus operations
sdhci: add ene controller id
mmc: bounce requests for simple hosts
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r-- | drivers/mmc/core/Makefile | 3 | ||||
-rw-r--r-- | drivers/mmc/core/bus.c | 253 | ||||
-rw-r--r-- | drivers/mmc/core/bus.h | 22 | ||||
-rw-r--r-- | drivers/mmc/core/core.c | 147 | ||||
-rw-r--r-- | drivers/mmc/core/core.h | 8 | ||||
-rw-r--r-- | drivers/mmc/core/host.c | 156 | ||||
-rw-r--r-- | drivers/mmc/core/host.h | 18 | ||||
-rw-r--r-- | drivers/mmc/core/mmc.c | 65 | ||||
-rw-r--r-- | drivers/mmc/core/sd.c | 63 | ||||
-rw-r--r-- | drivers/mmc/core/sysfs.c | 347 | ||||
-rw-r--r-- | drivers/mmc/core/sysfs.h | 19 |
11 files changed, 645 insertions, 456 deletions
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index 1075b02ae75..3fdd08c7f14 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -7,5 +7,6 @@ ifeq ($(CONFIG_MMC_DEBUG),y) endif obj-$(CONFIG_MMC) += mmc_core.o -mmc_core-y := core.o sysfs.o mmc.o mmc_ops.o sd.o sd_ops.o +mmc_core-y := core.o sysfs.o bus.o host.o \ + mmc.o mmc_ops.o sd.o sd_ops.o diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c new file mode 100644 index 00000000000..348b566bf4f --- /dev/null +++ b/drivers/mmc/core/bus.c @@ -0,0 +1,253 @@ +/* + * 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/device.h> +#include <linux/err.h> + +#include <linux/mmc/card.h> +#include <linux/mmc/host.h> + +#include "sysfs.h" +#include "core.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, + struct device_attribute *attr, char *buf) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + + switch (card->type) { + case MMC_TYPE_MMC: + return sprintf(buf, "MMC\n"); + case MMC_TYPE_SD: + return sprintf(buf, "SD\n"); + default: + return -EFAULT; + } +} + +static struct device_attribute mmc_dev_attrs[] = { + MMC_ATTR_RO(type), + __ATTR_NULL, +}; + +/* + * 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, char **envp, int num_envp, char *buf, + int buf_size) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + int retval = 0, i = 0, length = 0; + +#define add_env(fmt,val) do { \ + retval = add_uevent_var(envp, num_envp, &i, \ + buf, buf_size, &length, \ + fmt, val); \ + if (retval) \ + return retval; \ +} while (0); + + switch (card->type) { + case MMC_TYPE_MMC: + add_env("MMC_TYPE=%s", "MMC"); + break; + case MMC_TYPE_SD: + add_env("MMC_TYPE=%s", "SD"); + break; + } + + add_env("MMC_NAME=%s", mmc_card_name(card)); + +#undef add_env + + envp[i] = NULL; + + return 0; +} + +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); + + 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 = dev_to_mmc_card(dev); + + drv->remove(card); + + return 0; +} + +static int mmc_bus_suspend(struct device *dev, pm_message_t state) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = dev_to_mmc_card(dev); + int ret = 0; + + if (dev->driver && drv->suspend) + ret = drv->suspend(card, state); + 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; + + if (dev->driver && drv->resume) + ret = drv->resume(card); + return ret; +} + +static struct bus_type mmc_bus_type = { + .name = "mmc", + .dev_attrs = mmc_dev_attrs, + .match = mmc_bus_match, + .uevent = mmc_bus_uevent, + .probe = mmc_bus_probe, + .remove = mmc_bus_remove, + .suspend = mmc_bus_suspend, + .resume = mmc_bus_resume, +}; + +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 = dev_to_mmc_card(dev); + + kfree(card); +} + +/* + * Allocate and initialise a new MMC card structure. + */ +struct mmc_card *mmc_alloc_card(struct mmc_host *host) +{ + struct mmc_card *card; + + card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); + if (!card) + return ERR_PTR(-ENOMEM); + + memset(card, 0, sizeof(struct mmc_card)); + + 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; + + return card; +} + +/* + * Register a new MMC card with the driver model. + */ +int mmc_add_card(struct mmc_card *card) +{ + int ret; + + snprintf(card->dev.bus_id, sizeof(card->dev.bus_id), + "%s:%04x", mmc_hostname(card->host), card->rca); + + card->dev.uevent_suppress = 1; + + ret = device_add(&card->dev); + if (ret) + return ret; + + if (card->host->bus_ops->sysfs_add) { + ret = card->host->bus_ops->sysfs_add(card->host, card); + if (ret) { + device_del(&card->dev); + return ret; + } + } + + card->dev.uevent_suppress = 0; + + kobject_uevent(&card->dev.kobj, KOBJ_ADD); + + 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) +{ + if (mmc_card_present(card)) { + if (card->host->bus_ops->sysfs_remove) + card->host->bus_ops->sysfs_remove(card->host, card); + device_del(&card->dev); + } + + put_device(&card->dev); +} + diff --git a/drivers/mmc/core/bus.h b/drivers/mmc/core/bus.h new file mode 100644 index 00000000000..4f35431116a --- /dev/null +++ b/drivers/mmc/core/bus.h @@ -0,0 +1,22 @@ +/* + * linux/drivers/mmc/core/bus.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 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. + */ +#ifndef _MMC_CORE_BUS_H +#define _MMC_CORE_BUS_H + +struct mmc_card *mmc_alloc_card(struct mmc_host *host); +int mmc_add_card(struct mmc_card *card); +void mmc_remove_card(struct mmc_card *card); + +int mmc_register_bus(void); +void mmc_unregister_bus(void); + +#endif + diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 7385acfa1dd..b5d8a6d90cc 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -27,7 +27,8 @@ #include <linux/mmc/sd.h> #include "core.h" -#include "sysfs.h" +#include "bus.h" +#include "host.h" #include "mmc_ops.h" #include "sd_ops.h" @@ -35,6 +36,25 @@ extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr); extern int mmc_attach_sd(struct mmc_host *host, u32 ocr); +static struct workqueue_struct *workqueue; + +/* + * Internal function. Schedule delayed work in the MMC work queue. + */ +static int mmc_schedule_delayed_work(struct delayed_work *work, + unsigned long delay) +{ + return queue_delayed_work(workqueue, work, delay); +} + +/* + * Internal function. Flush all scheduled work from the MMC work queue. + */ +static void mmc_flush_scheduled_work(void) +{ + flush_workqueue(workqueue); +} + /** * mmc_request_done - finish processing an MMC request * @host: MMC host which completed request @@ -369,22 +389,6 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing) } /* - * Allocate a new MMC card - */ -struct mmc_card *mmc_alloc_card(struct mmc_host *host) -{ - struct mmc_card *card; - - card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); - if (!card) - return ERR_PTR(-ENOMEM); - - mmc_init_card(card, host); - - return card; -} - -/* * Apply power to the MMC stack. This is a two-stage process. * First, we enable power to the card without the clock running. * We then wait a bit for the power to stabilise. Finally, @@ -512,7 +516,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay) EXPORT_SYMBOL(mmc_detect_change); -static void mmc_rescan(struct work_struct *work) +void mmc_rescan(struct work_struct *work) { struct mmc_host *host = container_of(work, struct mmc_host, detect.work); @@ -561,69 +565,13 @@ static void mmc_rescan(struct work_struct *work) } } - -/** - * mmc_alloc_host - initialise the per-host structure. - * @extra: sizeof private data structure - * @dev: pointer to host device model structure - * - * Initialise the per-host structure. - */ -struct mmc_host *mmc_alloc_host(int extra, struct device *dev) +void mmc_start_host(struct mmc_host *host) { - struct mmc_host *host; - - host = mmc_alloc_host_sysfs(extra, dev); - if (host) { - spin_lock_init(&host->lock); - init_waitqueue_head(&host->wq); - INIT_DELAYED_WORK(&host->detect, mmc_rescan); - - /* - * By default, hosts do not support SGIO or large requests. - * They have to set these according to their abilities. - */ - host->max_hw_segs = 1; - host->max_phys_segs = 1; - host->max_seg_size = PAGE_CACHE_SIZE; - - host->max_req_size = PAGE_CACHE_SIZE; - host->max_blk_size = 512; - host->max_blk_count = PAGE_CACHE_SIZE / 512; - } - - return host; -} - -EXPORT_SYMBOL(mmc_alloc_host); - -/** - * mmc_add_host - initialise host hardware - * @host: mmc host - */ -int mmc_add_host(struct mmc_host *host) -{ - int ret; - - ret = mmc_add_host_sysfs(host); - if (ret == 0) { - mmc_power_off(host); - mmc_detect_change(host, 0); - } - - return ret; + mmc_power_off(host); + mmc_detect_change(host, 0); } -EXPORT_SYMBOL(mmc_add_host); - -/** - * mmc_remove_host - remove host hardware - * @host: mmc host - * - * Unregister and remove all cards associated with this host, - * and power down the MMC bus. - */ -void mmc_remove_host(struct mmc_host *host) +void mmc_stop_host(struct mmc_host *host) { #ifdef CONFIG_MMC_DEBUG unsigned long flags; @@ -648,24 +596,8 @@ void mmc_remove_host(struct mmc_host *host) BUG_ON(host->card); mmc_power_off(host); - mmc_remove_host_sysfs(host); } -EXPORT_SYMBOL(mmc_remove_host); - -/** - * mmc_free_host - free the host structure - * @host: mmc host - * - * Free the host once all references to it have been dropped. - */ -void mmc_free_host(struct mmc_host *host) -{ - mmc_free_host_sysfs(host); -} - -EXPORT_SYMBOL(mmc_free_host); - #ifdef CONFIG_PM /** @@ -726,4 +658,31 @@ EXPORT_SYMBOL(mmc_resume_host); #endif +static int __init mmc_init(void) +{ + int ret; + + workqueue = create_singlethread_workqueue("kmmcd"); + if (!workqueue) + return -ENOMEM; + + ret = mmc_register_bus(); + if (ret == 0) { + ret = mmc_register_host_class(); + if (ret) + mmc_unregister_bus(); + } + return ret; +} + +static void __exit mmc_exit(void) +{ + mmc_unregister_host_class(); + mmc_unregister_bus(); + destroy_workqueue(workqueue); +} + +module_init(mmc_init); +module_exit(mmc_exit); + MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 177264d090a..ae006b30dd8 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -18,6 +18,8 @@ struct mmc_bus_ops { void (*remove)(struct mmc_host *); void (*detect)(struct mmc_host *); + int (*sysfs_add)(struct mmc_host *, struct mmc_card *card); + void (*sysfs_remove)(struct mmc_host *, struct mmc_card *card); void (*suspend)(struct mmc_host *); void (*resume)(struct mmc_host *); }; @@ -54,8 +56,6 @@ void mmc_set_bus_width(struct mmc_host *host, unsigned int width); u32 mmc_select_voltage(struct mmc_host *host, u32 ocr); void mmc_set_timing(struct mmc_host *host, unsigned int timing); -struct mmc_card *mmc_alloc_card(struct mmc_host *host); - static inline void mmc_delay(unsigned int ms) { if (ms < 1000 / HZ) { @@ -66,5 +66,9 @@ static inline void mmc_delay(unsigned int ms) } } +void mmc_rescan(struct work_struct *work); +void mmc_start_host(struct mmc_host *host); +void mmc_stop_host(struct mmc_host *host); + #endif diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c new file mode 100644 index 00000000000..1433d95c40b --- /dev/null +++ b/drivers/mmc/core/host.c @@ -0,0 +1,156 @@ +/* + * linux/drivers/mmc/core/host.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 host class device management + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/idr.h> +#include <linux/pagemap.h> + +#include <linux/mmc/host.h> + +#include "core.h" +#include "host.h" + +#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev) + +static void mmc_host_classdev_release(struct device *dev) +{ + struct mmc_host *host = cls_dev_to_mmc_host(dev); + kfree(host); +} + +static struct class mmc_host_class = { + .name = "mmc_host", + .dev_release = mmc_host_classdev_release, +}; + +int mmc_register_host_class(void) +{ + return class_register(&mmc_host_class); +} + +void mmc_unregister_host_class(void) +{ + class_unregister(&mmc_host_class); +} + +static DEFINE_IDR(mmc_host_idr); +static DEFINE_SPINLOCK(mmc_host_lock); + +/** + * mmc_alloc_host - initialise the per-host structure. + * @extra: sizeof private data structure + * @dev: pointer to host device model structure + * + * Initialise the per-host structure. + */ +struct mmc_host *mmc_alloc_host(int extra, struct device *dev) +{ + struct mmc_host *host; + + host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL); + if (!host) + return NULL; + + memset(host, 0, sizeof(struct mmc_host) + extra); + + host->parent = dev; + host->class_dev.parent = dev; + host->class_dev.class = &mmc_host_class; + device_initialize(&host->class_dev); + + spin_lock_init(&host->lock); + init_waitqueue_head(&host->wq); + INIT_DELAYED_WORK(&host->detect, mmc_rescan); + + /* + * By default, hosts do not support SGIO or large requests. + * They have to set these according to their abilities. + */ + host->max_hw_segs = 1; + host->max_phys_segs = 1; + host->max_seg_size = PAGE_CACHE_SIZE; + + host->max_req_size = PAGE_CACHE_SIZE; + host->max_blk_size = 512; + host->max_blk_count = PAGE_CACHE_SIZE / 512; + + return host; +} + +EXPORT_SYMBOL(mmc_alloc_host); + +/** + * mmc_add_host - initialise host hardware + * @host: mmc host + */ +int mmc_add_host(struct mmc_host *host) +{ + int err; + + if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL)) + return -ENOMEM; + + spin_lock(&mmc_host_lock); + err = idr_get_new(&mmc_host_idr, host, &host->index); + spin_unlock(&mmc_host_lock); + if (err) + return err; + + snprintf(host->class_dev.bus_id, BUS_ID_SIZE, + "mmc%d", host->index); + + err = device_add(&host->class_dev); + if (err) + return err; + + mmc_start_host(host); + + return 0; +} + +EXPORT_SYMBOL(mmc_add_host); + +/** + * mmc_remove_host - remove host hardware + * @host: mmc host + * + * Unregister and remove all cards associated with this host, + * and power down the MMC bus. + */ +void mmc_remove_host(struct mmc_host *host) +{ + mmc_stop_host(host); + + device_del(&host->class_dev); + + spin_lock(&mmc_host_lock); + idr_remove(&mmc_host_idr, host->index); + spin_unlock(&mmc_host_lock); +} + +EXPORT_SYMBOL(mmc_remove_host); + +/** + * mmc_free_host - free the host structure + * @host: mmc host + * + * Free the host once all references to it have been dropped. + */ +void mmc_free_host(struct mmc_host *host) +{ + put_device(&host->class_dev); +} + +EXPORT_SYMBOL(mmc_free_host); + diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h new file mode 100644 index 00000000000..c2dc3d2d9f9 --- /dev/null +++ b/drivers/mmc/core/host.h @@ -0,0 +1,18 @@ +/* + * linux/drivers/mmc/core/host.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 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. + */ +#ifndef _MMC_CORE_HOST_H +#define _MMC_CORE_HOST_H + +int mmc_register_host_class(void); +void mmc_unregister_host_class(void); + +#endif + diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 42cc2867ed7..66f85bfa8db 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -18,6 +18,7 @@ #include "core.h" #include "sysfs.h" +#include "bus.h" #include "mmc_ops.h" static const unsigned int tran_exp[] = { @@ -236,7 +237,7 @@ out: * In the case of a resume, "curcard" will contain the card * we're trying to reinitialise. */ -static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, +static int mmc_init_card(struct mmc_host *host, u32 ocr, struct mmc_card *oldcard) { struct mmc_card *card; @@ -413,8 +414,7 @@ static void mmc_detect(struct mmc_host *host) mmc_release_host(host); if (err != MMC_ERR_NONE) { - mmc_remove_card(host->card); - host->card = NULL; + mmc_remove(host); mmc_claim_host(host); mmc_detach_bus(host); @@ -422,6 +422,53 @@ static void mmc_detect(struct mmc_host *host) } } +MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], + card->raw_cid[2], card->raw_cid[3]); +MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], + card->raw_csd[2], card->raw_csd[3]); +MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); +MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); +MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); +MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); +MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); +MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); +MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); + +static struct device_attribute mmc_dev_attrs[] = { + MMC_ATTR_RO(cid), + MMC_ATTR_RO(csd), + MMC_ATTR_RO(date), + MMC_ATTR_RO(fwrev), + MMC_ATTR_RO(hwrev), + MMC_ATTR_RO(manfid), + MMC_ATTR_RO(name), + MMC_ATTR_RO(oemid), + MMC_ATTR_RO(serial), + __ATTR_NULL, +}; + +/* + * Adds sysfs entries as relevant. + */ +static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card) +{ + int ret; + + ret = mmc_add_attrs(card, mmc_dev_attrs); + if (ret < 0) + return ret; + + return 0; +} + +/* + * Removes the sysfs entries added by mmc_sysfs_add(). + */ +static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card) +{ + mmc_remove_attrs(card, mmc_dev_attrs); +} + #ifdef CONFIG_MMC_UNSAFE_RESUME /* @@ -453,11 +500,9 @@ static void mmc_resume(struct mmc_host *host) mmc_claim_host(host); - err = mmc_sd_init_card(host, host->ocr, host->card); + err = mmc_init_card(host, host->ocr, host->card); if (err != MMC_ERR_NONE) { - mmc_remove_card(host->card); - host->card = NULL; - + mmc_remove(host); mmc_detach_bus(host); } @@ -474,6 +519,8 @@ static void mmc_resume(struct mmc_host *host) static const struct mmc_bus_ops mmc_ops = { .remove = mmc_remove, .detect = mmc_detect, + .sysfs_add = mmc_sysfs_add, + .sysfs_remove = mmc_sysfs_remove, .suspend = mmc_suspend, .resume = mmc_resume, }; @@ -512,13 +559,13 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr) /* * Detect and init the card. */ - err = mmc_sd_init_card(host, host->ocr, NULL); + err = mmc_init_card(host, host->ocr, NULL); if (err != MMC_ERR_NONE) goto err; mmc_release_host(host); - err = mmc_register_card(host->card); + err = mmc_add_card(host->card); if (err) goto reclaim_host; diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 918477c490b..1240684083f 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -19,11 +19,10 @@ #include "core.h" #include "sysfs.h" +#include "bus.h" #include "mmc_ops.h" #include "sd_ops.h" -#include "core.h" - static const unsigned int tran_exp[] = { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 @@ -487,8 +486,7 @@ static void mmc_sd_detect(struct mmc_host *host) mmc_release_host(host); if (err != MMC_ERR_NONE) { - mmc_remove_card(host->card); - host->card = NULL; + mmc_sd_remove(host); mmc_claim_host(host); mmc_detach_bus(host); @@ -496,6 +494,55 @@ static void mmc_sd_detect(struct mmc_host *host) } } +MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], + card->raw_cid[2], card->raw_cid[3]); +MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], + card->raw_csd[2], card->raw_csd[3]); +MMC_ATTR_FN(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); +MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); +MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); +MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); +MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); +MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); +MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); +MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); + +static struct device_attribute mmc_sd_dev_attrs[] = { + MMC_ATTR_RO(cid), + MMC_ATTR_RO(csd), + MMC_ATTR_RO(scr), + MMC_ATTR_RO(date), + MMC_ATTR_RO(fwrev), + MMC_ATTR_RO(hwrev), + MMC_ATTR_RO(manfid), + MMC_ATTR_RO(name), + MMC_ATTR_RO(oemid), + MMC_ATTR_RO(serial), + __ATTR_NULL, +}; + +/* + * Adds sysfs entries as relevant. + */ +static int mmc_sd_sysfs_add(struct mmc_host *host, struct mmc_card *card) +{ + int ret; + + ret = mmc_add_attrs(card, mmc_sd_dev_attrs); + if (ret < 0) + return ret; + + return 0; +} + +/* + * Removes the sysfs entries added by mmc_sysfs_add(). + */ +static void mmc_sd_sysfs_remove(struct mmc_host *host, struct mmc_card *card) +{ + mmc_remove_attrs(card, mmc_sd_dev_attrs); +} + #ifdef CONFIG_MMC_UNSAFE_RESUME /* @@ -529,9 +576,7 @@ static void mmc_sd_resume(struct mmc_host *host) err = mmc_sd_init_card(host, host->ocr, host->card); if (err != MMC_ERR_NONE) { - mmc_remove_card(host->card); - host->card = NULL; - + mmc_sd_remove(host); mmc_detach_bus(host); } @@ -548,6 +593,8 @@ static void mmc_sd_resume(struct mmc_host *host) static const struct mmc_bus_ops mmc_sd_ops = { .remove = mmc_sd_remove, .detect = mmc_sd_detect, + .sysfs_add = mmc_sd_sysfs_add, + .sysfs_remove = mmc_sd_sysfs_remove, .suspend = mmc_sd_suspend, .resume = mmc_sd_resume, }; @@ -599,7 +646,7 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr) mmc_release_host(host); - err = mmc_register_card(host->card); + err = mmc_add_card(host->card); if (err) goto reclaim_host; diff --git a/drivers/mmc/core/sysfs.c b/drivers/mmc/core/sysfs.c index 843b1fbba55..00a97e70f91 100644 --- a/drivers/mmc/core/sysfs.c +++ b/drivers/mmc/core/sysfs.c @@ -2,6 +2,7 @@ * linux/drivers/mmc/core/sysfs.c * * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 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 @@ -9,352 +10,34 @@ * * MMC sysfs/driver model support. */ -#include <linux/module.h> -#include <linux/init.h> #include <linux/device.h> -#include <linux/idr.h> -#include <linux/workqueue.h> #include <linux/mmc/card.h> -#include <linux/mmc/host.h> #include "sysfs.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) -#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev) - -#define MMC_ATTR(name, fmt, args...) \ -static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct mmc_card *card = dev_to_mmc_card(dev); \ - return sprintf(buf, fmt, args); \ -} - -MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], - card->raw_cid[2], card->raw_cid[3]); -MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], - card->raw_csd[2], card->raw_csd[3]); -MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); -MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); -MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev); -MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev); -MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid); -MMC_ATTR(name, "%s\n", card->cid.prod_name); -MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid); -MMC_ATTR(serial, "0x%08x\n", card->cid.serial); - -#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL) - -static struct device_attribute mmc_dev_attrs[] = { - MMC_ATTR_RO(cid), - MMC_ATTR_RO(csd), - MMC_ATTR_RO(date), - MMC_ATTR_RO(fwrev), - MMC_ATTR_RO(hwrev), - MMC_ATTR_RO(manfid), - MMC_ATTR_RO(name), - MMC_ATTR_RO(oemid), - MMC_ATTR_RO(serial), - __ATTR_NULL -}; - -static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr); - - -static void mmc_release_card(struct device *dev) -{ - struct mmc_card *card = dev_to_mmc_card(dev); - - kfree(card); -} - -/* - * 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, char **envp, int num_envp, char *buf, - int buf_size) -{ - struct mmc_card *card = dev_to_mmc_card(dev); - char ccc[13]; - int retval = 0, i = 0, length = 0; - -#define add_env(fmt,val) do { \ - retval = add_uevent_var(envp, num_envp, &i, \ - buf, buf_size, &length, \ - fmt, val); \ - if (retval) \ - return retval; \ -} while (0); - - for (i = 0; i < 12; i++) - ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0'; - ccc[12] = '\0'; - - add_env("MMC_CCC=%s", ccc); - add_env("MMC_MANFID=%06x", card->cid.manfid); - add_env("MMC_NAME=%s", mmc_card_name(card)); - add_env("MMC_OEMID=%04x", card->cid.oemid); -#undef add_env - envp[i] = NULL; - - return 0; -} - -static int mmc_bus_suspend(struct device *dev, pm_message_t state) -{ - struct mmc_driver *drv = to_mmc_driver(dev->driver); - struct mmc_card *card = dev_to_mmc_card(dev); - int ret = 0; - - if (dev->driver && drv->suspend) - ret = drv->suspend(card, state); - 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; - - if (dev->driver && drv->resume) - ret = drv->resume(card); - return ret; -} - -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); - - 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 = dev_to_mmc_card(dev); - - drv->remove(card); - - return 0; -} - -static struct bus_type mmc_bus_type = { - .name = "mmc", - .dev_attrs = mmc_dev_attrs, - .match = mmc_bus_match, - .uevent = mmc_bus_uevent, - .probe = mmc_bus_probe, - .remove = mmc_bus_remove, - .suspend = mmc_bus_suspend, - .resume = mmc_bus_resume, -}; - -/** - * 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); - - -/* - * Internal function. Initialise a MMC card structure. - */ -void mmc_init_card(struct mmc_card *card, struct mmc_host *host) -{ - memset(card, 0, sizeof(struct mmc_card)); - 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; -} - -/* - * Internal function. Register a new MMC card with the driver model. - */ -int mmc_register_card(struct mmc_card *card) +int mmc_add_attrs(struct mmc_card *card, struct device_attribute *attrs) { - int ret; + int error = 0; + int i; - snprintf(card->dev.bus_id, sizeof(card->dev.bus_id), - "%s:%04x", mmc_hostname(card->host), card->rca); - - ret = device_add(&card->dev); - if (ret == 0) { - if (mmc_card_sd(card)) { - ret = device_create_file(&card->dev, &mmc_dev_attr_scr); - if (ret) - device_del(&card->dev); + for (i = 0; attr_name(attrs[i]); i++) { + error = device_create_file(&card->dev, &attrs[i]); + if (error) { + while (--i >= 0) + device_remove_file(&card->dev, &attrs[i]); + break; } } - if (ret == 0) - mmc_card_set_present(card); - return ret; -} - -/* - * Internal function. Unregister a new MMC card with the - * driver model, and (eventually) free it. - */ -void mmc_remove_card(struct mmc_card *card) -{ - if (mmc_card_present(card)) { - if (mmc_card_sd(card)) - device_remove_file(&card->dev, &mmc_dev_attr_scr); - - device_del(&card->dev); - } - - put_device(&card->dev); -} - - -static void mmc_host_classdev_release(struct device *dev) -{ - struct mmc_host *host = cls_dev_to_mmc_host(dev); - kfree(host); -} - -static struct class mmc_host_class = { - .name = "mmc_host", - .dev_release = mmc_host_classdev_release, -}; - -static DEFINE_IDR(mmc_host_idr); -static DEFINE_SPINLOCK(mmc_host_lock); - -/* - * Internal function. Allocate a new MMC host. - */ -struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev) -{ - struct mmc_host *host; - - host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL); - if (host) { - memset(host, 0, sizeof(struct mmc_host) + extra); - - host->parent = dev; - host->class_dev.parent = dev; - host->class_dev.class = &mmc_host_class; - device_initialize(&host->class_dev); - } - return host; + return error; } -/* - * Internal function. Register a new MMC host with the MMC class. - */ -int mmc_add_host_sysfs(struct mmc_host *host) +void mmc_remove_attrs(struct mmc_card *card, struct device_attribute *attrs) { - int err; - - if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL)) - return -ENOMEM; - - spin_lock(&mmc_host_lock); - err = idr_get_new(&mmc_host_idr, host, &host->index); - spin_unlock(&mmc_host_lock); - if (err) - return err; - - snprintf(host->class_dev.bus_id, BUS_ID_SIZE, - "mmc%d", host->index); - - return device_add(&host->class_dev); -} + int i; -/* - * Internal function. Unregister a MMC host with the MMC class. - */ -void mmc_remove_host_sysfs(struct mmc_host *host) -{ - device_del(&host->class_dev); - - spin_lock(&mmc_host_lock); - idr_remove(&mmc_host_idr, host->index); - spin_unlock(&mmc_host_lock); -} - -/* - * Internal function. Free a MMC host. - */ -void mmc_free_host_sysfs(struct mmc_host *host) -{ - put_device(&host->class_dev); -} - -static struct workqueue_struct *workqueue; - -/* - * Internal function. Schedule delayed work in the MMC work queue. - */ -int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay) -{ - return queue_delayed_work(workqueue, work, delay); -} - -/* - * Internal function. Flush all scheduled work from the MMC work queue. - */ -void mmc_flush_scheduled_work(void) -{ - flush_workqueue(workqueue); -} - -static int __init mmc_init(void) -{ - int ret; - - workqueue = create_singlethread_workqueue("kmmcd"); - if (!workqueue) - return -ENOMEM; - - ret = bus_register(&mmc_bus_type); - if (ret == 0) { - ret = class_register(&mmc_host_class); - if (ret) - bus_unregister(&mmc_bus_type); - } - return ret; -} - -static void __exit mmc_exit(void) -{ - class_unregister(&mmc_host_class); - bus_unregister(&mmc_bus_type); - destroy_workqueue(workqueue); + for (i = 0; attr_name(attrs[i]); i++) + device_remove_file(&card->dev, &attrs[i]); } -module_init(mmc_init); -module_exit(mmc_exit); diff --git a/drivers/mmc/core/sysfs.h b/drivers/mmc/core/sysfs.h index 80e29b35828..4b8f670bd10 100644 --- a/drivers/mmc/core/sysfs.h +++ b/drivers/mmc/core/sysfs.h @@ -11,17 +11,16 @@ #ifndef _MMC_CORE_SYSFS_H #define _MMC_CORE_SYSFS_H -void mmc_init_card(struct mmc_card *card, struct mmc_host *host); -int mmc_register_card(struct mmc_card *card); -void mmc_remove_card(struct mmc_card *card); +#define MMC_ATTR_FN(name, fmt, args...) \ +static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct mmc_card *card = container_of(dev, struct mmc_card, dev);\ + return sprintf(buf, fmt, args); \ +} -struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev); -int mmc_add_host_sysfs(struct mmc_host *host); -void mmc_remove_host_sysfs(struct mmc_host *host); -void mmc_free_host_sysfs(struct mmc_host *host); +#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL) -int mmc_schedule_work(struct work_struct *work); -int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay); -void mmc_flush_scheduled_work(void); +int mmc_add_attrs(struct mmc_card *card, struct device_attribute *attrs); +void mmc_remove_attrs(struct mmc_card *card, struct device_attribute *attrs); #endif |