diff options
author | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-26 13:48:18 +0200 |
---|---|---|
committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-09-23 19:45:31 +0200 |
commit | e29a7d73f4277eb92aa64e17017dea33460828ef (patch) | |
tree | 0b8cfe6d145f41c43f86b475fff86627a305af1e /drivers/mmc/core | |
parent | b2bcc798bbb482b2909801280f3c4aff8cbbf5be (diff) | |
download | linux-stable-e29a7d73f4277eb92aa64e17017dea33460828ef.tar.gz linux-stable-e29a7d73f4277eb92aa64e17017dea33460828ef.tar.bz2 linux-stable-e29a7d73f4277eb92aa64e17017dea33460828ef.zip |
mmc: basic SDIO device model
Add the sdio bus type and basic device handling.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r-- | drivers/mmc/core/Makefile | 2 | ||||
-rw-r--r-- | drivers/mmc/core/core.c | 27 | ||||
-rw-r--r-- | drivers/mmc/core/sdio.c | 72 | ||||
-rw-r--r-- | drivers/mmc/core/sdio_bus.c | 129 | ||||
-rw-r--r-- | drivers/mmc/core/sdio_bus.h | 22 |
5 files changed, 237 insertions, 15 deletions
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index 2fa5ebbc170d..71ab3d1e1eb2 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -9,5 +9,5 @@ endif obj-$(CONFIG_MMC) += mmc_core.o mmc_core-y := core.o sysfs.o bus.o host.o \ mmc.o mmc_ops.o sd.o sd_ops.o \ - sdio.o sdio_ops.o + sdio.o sdio_ops.o sdio_bus.o diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 092fa906ab86..9747455928da 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -29,6 +29,7 @@ #include "core.h" #include "bus.h" #include "host.h" +#include "sdio_bus.h" #include "mmc_ops.h" #include "sd_ops.h" @@ -739,16 +740,32 @@ static int __init mmc_init(void) return -ENOMEM; ret = mmc_register_bus(); - if (ret == 0) { - ret = mmc_register_host_class(); - if (ret) - mmc_unregister_bus(); - } + if (ret) + goto destroy_workqueue; + + ret = mmc_register_host_class(); + if (ret) + goto unregister_bus; + + ret = sdio_register_bus(); + if (ret) + goto unregister_host_class; + + return 0; + +unregister_host_class: + mmc_unregister_host_class(); +unregister_bus: + mmc_unregister_bus(); +destroy_workqueue: + destroy_workqueue(workqueue); + return ret; } static void __exit mmc_exit(void) { + sdio_unregister_bus(); mmc_unregister_host_class(); mmc_unregister_bus(); destroy_workqueue(workqueue); diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index ac0dd68df8e7..444328581cec 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -13,21 +13,49 @@ #include <linux/mmc/host.h> #include <linux/mmc/card.h> +#include <linux/mmc/sdio_func.h> #include "core.h" #include "bus.h" +#include "sdio_bus.h" #include "mmc_ops.h" #include "sd_ops.h" #include "sdio_ops.h" +static int sdio_init_func(struct mmc_card *card, unsigned int fn) +{ + struct sdio_func *func; + + BUG_ON(fn > SDIO_MAX_FUNCS); + + func = sdio_alloc_func(card); + if (IS_ERR(func)) + return PTR_ERR(func); + + func->num = fn; + + card->sdio_func[fn - 1] = func; + + return 0; +} + /* * Host is being removed. Free up the current card. */ static void mmc_sdio_remove(struct mmc_host *host) { + int i; + BUG_ON(!host); BUG_ON(!host->card); + for (i = 0;i < host->card->sdio_funcs;i++) { + if (host->card->sdio_func[i]) { + sdio_remove_func(host->card->sdio_func[i]); + host->card->sdio_func[i] = NULL; + } + } + mmc_remove_card(host->card); host->card = NULL; } @@ -73,7 +101,7 @@ static const struct mmc_bus_ops mmc_sdio_ops = { int mmc_attach_sdio(struct mmc_host *host, u32 ocr) { int err; - int funcs; + int i, funcs; struct mmc_card *card; BUG_ON(!host); @@ -132,13 +160,16 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) } card->type = MMC_TYPE_SDIO; + card->sdio_funcs = funcs; + + host->card = card; /* * Set card RCA. */ err = mmc_send_relative_addr(host, &card->rca); if (err) - goto free_card; + goto remove; mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); @@ -147,23 +178,46 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) */ err = mmc_select_card(card); if (err) - goto free_card; + goto remove; - host->card = card; + /* + * Initialize (but don't add) all present functions. + */ + for (i = 0;i < funcs;i++) { + err = sdio_init_func(host->card, i + 1); + if (err) + goto remove; + } mmc_release_host(host); + /* + * First add the card to the driver model... + */ err = mmc_add_card(host->card); if (err) - goto reclaim_host; + goto remove_added; + + /* + * ...then the SDIO functions. + */ + for (i = 0;i < funcs;i++) { + err = sdio_add_func(host->card->sdio_func[i]); + if (err) + goto remove_added; + } return 0; -reclaim_host: + +remove_added: + /* Remove without lock if the device has been added. */ + mmc_sdio_remove(host); mmc_claim_host(host); -free_card: - mmc_remove_card(card); - host->card = NULL; +remove: + /* And with lock if it hasn't been added. */ + if (host->card) + mmc_sdio_remove(host); err: mmc_detach_bus(host); mmc_release_host(host); diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c new file mode 100644 index 000000000000..59c909e1c7c6 --- /dev/null +++ b/drivers/mmc/core/sdio_bus.c @@ -0,0 +1,129 @@ +/* + * linux/drivers/mmc/core/sdio_bus.c + * + * 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 as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * SDIO function driver model + */ + +#include <linux/device.h> +#include <linux/err.h> + +#include <linux/mmc/card.h> +#include <linux/mmc/sdio_func.h> + +#include "sdio_bus.h" + +#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) + +/* + * This currently matches any SDIO function to any driver in order + * to help initial development and testing. + */ +static int sdio_bus_match(struct device *dev, struct device_driver *drv) +{ + return 1; +} + +static int +sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, + int buf_size) +{ + envp[0] = NULL; + + return 0; +} + +static int sdio_bus_probe(struct device *dev) +{ + return -ENODEV; +} + +static int sdio_bus_remove(struct device *dev) +{ + return 0; +} + +static struct bus_type sdio_bus_type = { + .name = "sdio", + .match = sdio_bus_match, + .uevent = sdio_bus_uevent, + .probe = sdio_bus_probe, + .remove = sdio_bus_remove, +}; + +int sdio_register_bus(void) +{ + return bus_register(&sdio_bus_type); +} + +void sdio_unregister_bus(void) +{ + bus_unregister(&sdio_bus_type); +} + +static void sdio_release_func(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + + kfree(func); +} + +/* + * Allocate and initialise a new SDIO function structure. + */ +struct sdio_func *sdio_alloc_func(struct mmc_card *card) +{ + struct sdio_func *func; + + func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL); + if (!func) + return ERR_PTR(-ENOMEM); + + memset(func, 0, sizeof(struct sdio_func)); + + func->card = card; + + device_initialize(&func->dev); + + func->dev.parent = &card->dev; + func->dev.bus = &sdio_bus_type; + func->dev.release = sdio_release_func; + + return func; +} + +/* + * Register a new SDIO function with the driver model. + */ +int sdio_add_func(struct sdio_func *func) +{ + int ret; + + snprintf(func->dev.bus_id, sizeof(func->dev.bus_id), + "%s:%d", mmc_card_id(func->card), func->num); + + ret = device_add(&func->dev); + if (ret == 0) + sdio_func_set_present(func); + + return ret; +} + +/* + * Unregister a SDIO function with the driver model, and + * (eventually) free it. + */ +void sdio_remove_func(struct sdio_func *func) +{ + if (sdio_func_present(func)) + device_del(&func->dev); + + put_device(&func->dev); +} + diff --git a/drivers/mmc/core/sdio_bus.h b/drivers/mmc/core/sdio_bus.h new file mode 100644 index 000000000000..567a76821ba7 --- /dev/null +++ b/drivers/mmc/core/sdio_bus.h @@ -0,0 +1,22 @@ +/* + * linux/drivers/mmc/core/sdio_bus.h + * + * 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 as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ +#ifndef _MMC_CORE_SDIO_BUS_H +#define _MMC_CORE_SDIO_BUS_H + +struct sdio_func *sdio_alloc_func(struct mmc_card *card); +int sdio_add_func(struct sdio_func *func); +void sdio_remove_func(struct sdio_func *func); + +int sdio_register_bus(void); +void sdio_unregister_bus(void); + +#endif + |