| /* |
| * 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_cis.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); |
| } |
| |
| /** |
| * sdio_register_driver - register a function driver |
| * @drv: SDIO function driver |
| */ |
| int sdio_register_driver(struct sdio_driver *drv) |
| { |
| drv->drv.name = drv->name; |
| drv->drv.bus = &sdio_bus_type; |
| return driver_register(&drv->drv); |
| } |
| EXPORT_SYMBOL_GPL(sdio_register_driver); |
| |
| /** |
| * sdio_unregister_driver - unregister a function driver |
| * @drv: SDIO function driver |
| */ |
| void sdio_unregister_driver(struct sdio_driver *drv) |
| { |
| drv->drv.bus = &sdio_bus_type; |
| driver_unregister(&drv->drv); |
| } |
| EXPORT_SYMBOL_GPL(sdio_unregister_driver); |
| |
| static void sdio_release_func(struct device *dev) |
| { |
| struct sdio_func *func = dev_to_sdio_func(dev); |
| |
| sdio_free_func_cis(func); |
| |
| 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); |
| } |
| |