Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mmc/core/sdio_bus.c |
| 3 | * |
| 4 | * Copyright 2007 Pierre Ossman |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or (at |
| 9 | * your option) any later version. |
| 10 | * |
| 11 | * SDIO function driver model |
| 12 | */ |
| 13 | |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/err.h> |
| 16 | |
| 17 | #include <linux/mmc/card.h> |
| 18 | #include <linux/mmc/sdio_func.h> |
| 19 | |
| 20 | #include "sdio_bus.h" |
| 21 | |
| 22 | #define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) |
| 23 | |
| 24 | /* |
| 25 | * This currently matches any SDIO function to any driver in order |
| 26 | * to help initial development and testing. |
| 27 | */ |
| 28 | static int sdio_bus_match(struct device *dev, struct device_driver *drv) |
| 29 | { |
| 30 | return 1; |
| 31 | } |
| 32 | |
| 33 | static int |
| 34 | sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, |
| 35 | int buf_size) |
| 36 | { |
| 37 | envp[0] = NULL; |
| 38 | |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static int sdio_bus_probe(struct device *dev) |
| 43 | { |
| 44 | return -ENODEV; |
| 45 | } |
| 46 | |
| 47 | static int sdio_bus_remove(struct device *dev) |
| 48 | { |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | static struct bus_type sdio_bus_type = { |
| 53 | .name = "sdio", |
| 54 | .match = sdio_bus_match, |
| 55 | .uevent = sdio_bus_uevent, |
| 56 | .probe = sdio_bus_probe, |
| 57 | .remove = sdio_bus_remove, |
| 58 | }; |
| 59 | |
| 60 | int sdio_register_bus(void) |
| 61 | { |
| 62 | return bus_register(&sdio_bus_type); |
| 63 | } |
| 64 | |
| 65 | void sdio_unregister_bus(void) |
| 66 | { |
| 67 | bus_unregister(&sdio_bus_type); |
| 68 | } |
| 69 | |
Pierre Ossman | f76c851 | 2007-05-27 12:00:02 +0200 | [diff] [blame^] | 70 | /** |
| 71 | * sdio_register_driver - register a function driver |
| 72 | * @drv: SDIO function driver |
| 73 | */ |
| 74 | int sdio_register_driver(struct sdio_driver *drv) |
| 75 | { |
| 76 | drv->drv.name = drv->name; |
| 77 | drv->drv.bus = &sdio_bus_type; |
| 78 | return driver_register(&drv->drv); |
| 79 | } |
| 80 | EXPORT_SYMBOL_GPL(sdio_register_driver); |
| 81 | |
| 82 | /** |
| 83 | * sdio_unregister_driver - unregister a function driver |
| 84 | * @drv: SDIO function driver |
| 85 | */ |
| 86 | void sdio_unregister_driver(struct sdio_driver *drv) |
| 87 | { |
| 88 | drv->drv.bus = &sdio_bus_type; |
| 89 | driver_unregister(&drv->drv); |
| 90 | } |
| 91 | EXPORT_SYMBOL_GPL(sdio_unregister_driver); |
| 92 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 93 | static void sdio_release_func(struct device *dev) |
| 94 | { |
| 95 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 96 | |
| 97 | kfree(func); |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | * Allocate and initialise a new SDIO function structure. |
| 102 | */ |
| 103 | struct sdio_func *sdio_alloc_func(struct mmc_card *card) |
| 104 | { |
| 105 | struct sdio_func *func; |
| 106 | |
| 107 | func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL); |
| 108 | if (!func) |
| 109 | return ERR_PTR(-ENOMEM); |
| 110 | |
| 111 | memset(func, 0, sizeof(struct sdio_func)); |
| 112 | |
| 113 | func->card = card; |
| 114 | |
| 115 | device_initialize(&func->dev); |
| 116 | |
| 117 | func->dev.parent = &card->dev; |
| 118 | func->dev.bus = &sdio_bus_type; |
| 119 | func->dev.release = sdio_release_func; |
| 120 | |
| 121 | return func; |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * Register a new SDIO function with the driver model. |
| 126 | */ |
| 127 | int sdio_add_func(struct sdio_func *func) |
| 128 | { |
| 129 | int ret; |
| 130 | |
| 131 | snprintf(func->dev.bus_id, sizeof(func->dev.bus_id), |
| 132 | "%s:%d", mmc_card_id(func->card), func->num); |
| 133 | |
| 134 | ret = device_add(&func->dev); |
| 135 | if (ret == 0) |
| 136 | sdio_func_set_present(func); |
| 137 | |
| 138 | return ret; |
| 139 | } |
| 140 | |
| 141 | /* |
| 142 | * Unregister a SDIO function with the driver model, and |
| 143 | * (eventually) free it. |
| 144 | */ |
| 145 | void sdio_remove_func(struct sdio_func *func) |
| 146 | { |
| 147 | if (sdio_func_present(func)) |
| 148 | device_del(&func->dev); |
| 149 | |
| 150 | put_device(&func->dev); |
| 151 | } |
| 152 | |