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 | |
Nicolas Pitre | b1538bc | 2007-06-16 02:06:47 -0400 | [diff] [blame] | 20 | #include "sdio_cis.h" |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 21 | #include "sdio_bus.h" |
| 22 | |
| 23 | #define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 24 | #define to_sdio_driver(d) container_of(d, struct sdio_driver, drv) |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 25 | |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 26 | static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, |
| 27 | const struct sdio_device_id *id) |
| 28 | { |
| 29 | if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) |
| 30 | return NULL; |
| 31 | if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) |
| 32 | return NULL; |
| 33 | if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) |
| 34 | return NULL; |
| 35 | return id; |
| 36 | } |
| 37 | |
| 38 | static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, |
| 39 | struct sdio_driver *sdrv) |
| 40 | { |
| 41 | const struct sdio_device_id *ids; |
| 42 | |
| 43 | ids = sdrv->id_table; |
| 44 | |
| 45 | if (ids) { |
| 46 | while (ids->class || ids->vendor || ids->device) { |
| 47 | if (sdio_match_one(func, ids)) |
| 48 | return ids; |
| 49 | ids++; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | return NULL; |
| 54 | } |
| 55 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 56 | static int sdio_bus_match(struct device *dev, struct device_driver *drv) |
| 57 | { |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 58 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 59 | struct sdio_driver *sdrv = to_sdio_driver(drv); |
| 60 | |
| 61 | if (sdio_match_device(func, sdrv)) |
| 62 | return 1; |
| 63 | |
| 64 | return 0; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | static int |
| 68 | sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, |
| 69 | int buf_size) |
| 70 | { |
Pierre Ossman | d59b66c | 2007-06-17 11:34:23 +0200 | [diff] [blame^] | 71 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 72 | int i = 0, length = 0; |
| 73 | |
| 74 | if (add_uevent_var(envp, num_envp, &i, |
| 75 | buf, buf_size, &length, |
| 76 | "SDIO_CLASS=%02X", func->class)) |
| 77 | return -ENOMEM; |
| 78 | |
| 79 | if (add_uevent_var(envp, num_envp, &i, |
| 80 | buf, buf_size, &length, |
| 81 | "SDIO_ID=%04X:%04X", func->vendor, func->device)) |
| 82 | return -ENOMEM; |
| 83 | |
| 84 | if (add_uevent_var(envp, num_envp, &i, |
| 85 | buf, buf_size, &length, |
| 86 | "MODALIAS=sdio:c%02Xv%04Xd%04X", |
| 87 | func->class, func->vendor, func->device)) |
| 88 | return -ENOMEM; |
| 89 | |
| 90 | envp[i] = NULL; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static int sdio_bus_probe(struct device *dev) |
| 96 | { |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 97 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
| 98 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 99 | const struct sdio_device_id *id; |
| 100 | |
| 101 | id = sdio_match_device(func, drv); |
| 102 | if (!id) |
| 103 | return -ENODEV; |
| 104 | |
| 105 | return drv->probe(func, id); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | static int sdio_bus_remove(struct device *dev) |
| 109 | { |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 110 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
| 111 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 112 | |
| 113 | drv->remove(func); |
| 114 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static struct bus_type sdio_bus_type = { |
| 119 | .name = "sdio", |
| 120 | .match = sdio_bus_match, |
| 121 | .uevent = sdio_bus_uevent, |
| 122 | .probe = sdio_bus_probe, |
| 123 | .remove = sdio_bus_remove, |
| 124 | }; |
| 125 | |
| 126 | int sdio_register_bus(void) |
| 127 | { |
| 128 | return bus_register(&sdio_bus_type); |
| 129 | } |
| 130 | |
| 131 | void sdio_unregister_bus(void) |
| 132 | { |
| 133 | bus_unregister(&sdio_bus_type); |
| 134 | } |
| 135 | |
Pierre Ossman | f76c851 | 2007-05-27 12:00:02 +0200 | [diff] [blame] | 136 | /** |
| 137 | * sdio_register_driver - register a function driver |
| 138 | * @drv: SDIO function driver |
| 139 | */ |
| 140 | int sdio_register_driver(struct sdio_driver *drv) |
| 141 | { |
| 142 | drv->drv.name = drv->name; |
| 143 | drv->drv.bus = &sdio_bus_type; |
| 144 | return driver_register(&drv->drv); |
| 145 | } |
| 146 | EXPORT_SYMBOL_GPL(sdio_register_driver); |
| 147 | |
| 148 | /** |
| 149 | * sdio_unregister_driver - unregister a function driver |
| 150 | * @drv: SDIO function driver |
| 151 | */ |
| 152 | void sdio_unregister_driver(struct sdio_driver *drv) |
| 153 | { |
| 154 | drv->drv.bus = &sdio_bus_type; |
| 155 | driver_unregister(&drv->drv); |
| 156 | } |
| 157 | EXPORT_SYMBOL_GPL(sdio_unregister_driver); |
| 158 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 159 | static void sdio_release_func(struct device *dev) |
| 160 | { |
| 161 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 162 | |
Pierre Ossman | 1a632f8 | 2007-07-30 15:15:30 +0200 | [diff] [blame] | 163 | sdio_free_func_cis(func); |
Nicolas Pitre | b1538bc | 2007-06-16 02:06:47 -0400 | [diff] [blame] | 164 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 165 | kfree(func); |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * Allocate and initialise a new SDIO function structure. |
| 170 | */ |
| 171 | struct sdio_func *sdio_alloc_func(struct mmc_card *card) |
| 172 | { |
| 173 | struct sdio_func *func; |
| 174 | |
| 175 | func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL); |
| 176 | if (!func) |
| 177 | return ERR_PTR(-ENOMEM); |
| 178 | |
| 179 | memset(func, 0, sizeof(struct sdio_func)); |
| 180 | |
| 181 | func->card = card; |
| 182 | |
| 183 | device_initialize(&func->dev); |
| 184 | |
| 185 | func->dev.parent = &card->dev; |
| 186 | func->dev.bus = &sdio_bus_type; |
| 187 | func->dev.release = sdio_release_func; |
| 188 | |
| 189 | return func; |
| 190 | } |
| 191 | |
| 192 | /* |
| 193 | * Register a new SDIO function with the driver model. |
| 194 | */ |
| 195 | int sdio_add_func(struct sdio_func *func) |
| 196 | { |
| 197 | int ret; |
| 198 | |
| 199 | snprintf(func->dev.bus_id, sizeof(func->dev.bus_id), |
| 200 | "%s:%d", mmc_card_id(func->card), func->num); |
| 201 | |
| 202 | ret = device_add(&func->dev); |
| 203 | if (ret == 0) |
| 204 | sdio_func_set_present(func); |
| 205 | |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Unregister a SDIO function with the driver model, and |
| 211 | * (eventually) free it. |
| 212 | */ |
| 213 | void sdio_remove_func(struct sdio_func *func) |
| 214 | { |
| 215 | if (sdio_func_present(func)) |
| 216 | device_del(&func->dev); |
| 217 | |
| 218 | put_device(&func->dev); |
| 219 | } |
| 220 | |