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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 16 | #include <linux/slab.h> |
Ohad Ben-Cohen | 80fd933 | 2010-10-02 13:54:09 +0200 | [diff] [blame^] | 17 | #include <linux/pm_runtime.h> |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 18 | |
| 19 | #include <linux/mmc/card.h> |
| 20 | #include <linux/mmc/sdio_func.h> |
| 21 | |
Nicolas Pitre | b1538bc | 2007-06-16 02:06:47 -0400 | [diff] [blame] | 22 | #include "sdio_cis.h" |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 23 | #include "sdio_bus.h" |
| 24 | |
Pierre Ossman | bcfe66e | 2007-06-17 11:42:21 +0200 | [diff] [blame] | 25 | /* show configuration fields */ |
| 26 | #define sdio_config_attr(field, format_string) \ |
| 27 | static ssize_t \ |
| 28 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
| 29 | { \ |
| 30 | struct sdio_func *func; \ |
| 31 | \ |
| 32 | func = dev_to_sdio_func (dev); \ |
| 33 | return sprintf (buf, format_string, func->field); \ |
| 34 | } |
| 35 | |
| 36 | sdio_config_attr(class, "0x%02x\n"); |
| 37 | sdio_config_attr(vendor, "0x%04x\n"); |
| 38 | sdio_config_attr(device, "0x%04x\n"); |
| 39 | |
| 40 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 41 | { |
| 42 | struct sdio_func *func = dev_to_sdio_func (dev); |
| 43 | |
| 44 | return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n", |
| 45 | func->class, func->vendor, func->device); |
| 46 | } |
| 47 | |
Adrian Bunk | 22bfc97 | 2007-07-29 16:58:09 +0200 | [diff] [blame] | 48 | static struct device_attribute sdio_dev_attrs[] = { |
Pierre Ossman | bcfe66e | 2007-06-17 11:42:21 +0200 | [diff] [blame] | 49 | __ATTR_RO(class), |
| 50 | __ATTR_RO(vendor), |
| 51 | __ATTR_RO(device), |
| 52 | __ATTR_RO(modalias), |
| 53 | __ATTR_NULL, |
| 54 | }; |
| 55 | |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 56 | static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, |
| 57 | const struct sdio_device_id *id) |
| 58 | { |
| 59 | if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) |
| 60 | return NULL; |
| 61 | if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) |
| 62 | return NULL; |
| 63 | if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) |
| 64 | return NULL; |
| 65 | return id; |
| 66 | } |
| 67 | |
| 68 | static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, |
| 69 | struct sdio_driver *sdrv) |
| 70 | { |
| 71 | const struct sdio_device_id *ids; |
| 72 | |
| 73 | ids = sdrv->id_table; |
| 74 | |
| 75 | if (ids) { |
| 76 | while (ids->class || ids->vendor || ids->device) { |
| 77 | if (sdio_match_one(func, ids)) |
| 78 | return ids; |
| 79 | ids++; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return NULL; |
| 84 | } |
| 85 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 86 | static int sdio_bus_match(struct device *dev, struct device_driver *drv) |
| 87 | { |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 88 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 89 | struct sdio_driver *sdrv = to_sdio_driver(drv); |
| 90 | |
| 91 | if (sdio_match_device(func, sdrv)) |
| 92 | return 1; |
| 93 | |
| 94 | return 0; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static int |
Al Viro | 7ac0326 | 2007-10-14 05:46:09 +0100 | [diff] [blame] | 98 | sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 99 | { |
Pierre Ossman | d59b66c | 2007-06-17 11:34:23 +0200 | [diff] [blame] | 100 | struct sdio_func *func = dev_to_sdio_func(dev); |
Pierre Ossman | d59b66c | 2007-06-17 11:34:23 +0200 | [diff] [blame] | 101 | |
Al Viro | 7ac0326 | 2007-10-14 05:46:09 +0100 | [diff] [blame] | 102 | if (add_uevent_var(env, |
Pierre Ossman | d59b66c | 2007-06-17 11:34:23 +0200 | [diff] [blame] | 103 | "SDIO_CLASS=%02X", func->class)) |
| 104 | return -ENOMEM; |
| 105 | |
Al Viro | 7ac0326 | 2007-10-14 05:46:09 +0100 | [diff] [blame] | 106 | if (add_uevent_var(env, |
Pierre Ossman | d59b66c | 2007-06-17 11:34:23 +0200 | [diff] [blame] | 107 | "SDIO_ID=%04X:%04X", func->vendor, func->device)) |
| 108 | return -ENOMEM; |
| 109 | |
Al Viro | 7ac0326 | 2007-10-14 05:46:09 +0100 | [diff] [blame] | 110 | if (add_uevent_var(env, |
Pierre Ossman | d59b66c | 2007-06-17 11:34:23 +0200 | [diff] [blame] | 111 | "MODALIAS=sdio:c%02Xv%04Xd%04X", |
| 112 | func->class, func->vendor, func->device)) |
| 113 | return -ENOMEM; |
| 114 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static int sdio_bus_probe(struct device *dev) |
| 119 | { |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 120 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
| 121 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 122 | const struct sdio_device_id *id; |
David Vrabel | 9a08f82 | 2007-08-08 14:23:48 +0100 | [diff] [blame] | 123 | int ret; |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 124 | |
| 125 | id = sdio_match_device(func, drv); |
| 126 | if (!id) |
| 127 | return -ENODEV; |
| 128 | |
David Vrabel | 9a08f82 | 2007-08-08 14:23:48 +0100 | [diff] [blame] | 129 | /* Set the default block size so the driver is sure it's something |
| 130 | * sensible. */ |
| 131 | sdio_claim_host(func); |
| 132 | ret = sdio_set_block_size(func, 0); |
| 133 | sdio_release_host(func); |
| 134 | if (ret) |
| 135 | return ret; |
| 136 | |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 137 | return drv->probe(func, id); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | static int sdio_bus_remove(struct device *dev) |
| 141 | { |
Pierre Ossman | 3b38bea | 2007-06-16 15:54:55 +0200 | [diff] [blame] | 142 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
| 143 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 144 | |
| 145 | drv->remove(func); |
| 146 | |
Nicolas Pitre | d1496c3 | 2007-06-30 16:29:41 +0200 | [diff] [blame] | 147 | if (func->irq_handler) { |
| 148 | printk(KERN_WARNING "WARNING: driver %s did not remove " |
| 149 | "its interrupt handler!\n", drv->name); |
| 150 | sdio_claim_host(func); |
| 151 | sdio_release_irq(func); |
| 152 | sdio_release_host(func); |
| 153 | } |
| 154 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 155 | return 0; |
| 156 | } |
| 157 | |
Ohad Ben-Cohen | 80fd933 | 2010-10-02 13:54:09 +0200 | [diff] [blame^] | 158 | #ifdef CONFIG_PM_RUNTIME |
| 159 | |
| 160 | static const struct dev_pm_ops sdio_bus_pm_ops = { |
| 161 | SET_RUNTIME_PM_OPS( |
| 162 | pm_generic_runtime_suspend, |
| 163 | pm_generic_runtime_resume, |
| 164 | pm_generic_runtime_idle |
| 165 | ) |
| 166 | }; |
| 167 | |
| 168 | #define SDIO_PM_OPS_PTR (&sdio_bus_pm_ops) |
| 169 | |
| 170 | #else /* !CONFIG_PM_RUNTIME */ |
| 171 | |
| 172 | #define SDIO_PM_OPS_PTR NULL |
| 173 | |
| 174 | #endif /* !CONFIG_PM_RUNTIME */ |
| 175 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 176 | static struct bus_type sdio_bus_type = { |
| 177 | .name = "sdio", |
Pierre Ossman | bcfe66e | 2007-06-17 11:42:21 +0200 | [diff] [blame] | 178 | .dev_attrs = sdio_dev_attrs, |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 179 | .match = sdio_bus_match, |
| 180 | .uevent = sdio_bus_uevent, |
| 181 | .probe = sdio_bus_probe, |
| 182 | .remove = sdio_bus_remove, |
Ohad Ben-Cohen | 80fd933 | 2010-10-02 13:54:09 +0200 | [diff] [blame^] | 183 | .pm = SDIO_PM_OPS_PTR, |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 184 | }; |
| 185 | |
| 186 | int sdio_register_bus(void) |
| 187 | { |
| 188 | return bus_register(&sdio_bus_type); |
| 189 | } |
| 190 | |
| 191 | void sdio_unregister_bus(void) |
| 192 | { |
| 193 | bus_unregister(&sdio_bus_type); |
| 194 | } |
| 195 | |
Pierre Ossman | f76c851 | 2007-05-27 12:00:02 +0200 | [diff] [blame] | 196 | /** |
| 197 | * sdio_register_driver - register a function driver |
| 198 | * @drv: SDIO function driver |
| 199 | */ |
| 200 | int sdio_register_driver(struct sdio_driver *drv) |
| 201 | { |
| 202 | drv->drv.name = drv->name; |
| 203 | drv->drv.bus = &sdio_bus_type; |
| 204 | return driver_register(&drv->drv); |
| 205 | } |
| 206 | EXPORT_SYMBOL_GPL(sdio_register_driver); |
| 207 | |
| 208 | /** |
| 209 | * sdio_unregister_driver - unregister a function driver |
| 210 | * @drv: SDIO function driver |
| 211 | */ |
| 212 | void sdio_unregister_driver(struct sdio_driver *drv) |
| 213 | { |
| 214 | drv->drv.bus = &sdio_bus_type; |
| 215 | driver_unregister(&drv->drv); |
| 216 | } |
| 217 | EXPORT_SYMBOL_GPL(sdio_unregister_driver); |
| 218 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 219 | static void sdio_release_func(struct device *dev) |
| 220 | { |
| 221 | struct sdio_func *func = dev_to_sdio_func(dev); |
| 222 | |
Pierre Ossman | 1a632f8 | 2007-07-30 15:15:30 +0200 | [diff] [blame] | 223 | sdio_free_func_cis(func); |
Nicolas Pitre | b1538bc | 2007-06-16 02:06:47 -0400 | [diff] [blame] | 224 | |
Pierre Ossman | 759bdc7 | 2007-09-19 18:42:16 +0200 | [diff] [blame] | 225 | if (func->info) |
| 226 | kfree(func->info); |
| 227 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 228 | kfree(func); |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * Allocate and initialise a new SDIO function structure. |
| 233 | */ |
| 234 | struct sdio_func *sdio_alloc_func(struct mmc_card *card) |
| 235 | { |
| 236 | struct sdio_func *func; |
| 237 | |
Mariusz Kozlowski | 9f2fcf9 | 2007-08-01 00:05:24 +0200 | [diff] [blame] | 238 | func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 239 | if (!func) |
| 240 | return ERR_PTR(-ENOMEM); |
| 241 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 242 | func->card = card; |
| 243 | |
| 244 | device_initialize(&func->dev); |
| 245 | |
| 246 | func->dev.parent = &card->dev; |
| 247 | func->dev.bus = &sdio_bus_type; |
| 248 | func->dev.release = sdio_release_func; |
| 249 | |
| 250 | return func; |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * Register a new SDIO function with the driver model. |
| 255 | */ |
| 256 | int sdio_add_func(struct sdio_func *func) |
| 257 | { |
| 258 | int ret; |
| 259 | |
Kay Sievers | d1b2686 | 2008-11-08 21:37:46 +0100 | [diff] [blame] | 260 | dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 261 | |
| 262 | ret = device_add(&func->dev); |
| 263 | if (ret == 0) |
| 264 | sdio_func_set_present(func); |
| 265 | |
| 266 | return ret; |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Unregister a SDIO function with the driver model, and |
| 271 | * (eventually) free it. |
Daniel Drake | 3d10a1b | 2009-12-17 15:27:17 -0800 | [diff] [blame] | 272 | * This function can be called through error paths where sdio_add_func() was |
| 273 | * never executed (because a failure occurred at an earlier point). |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 274 | */ |
| 275 | void sdio_remove_func(struct sdio_func *func) |
| 276 | { |
Daniel Drake | 3d10a1b | 2009-12-17 15:27:17 -0800 | [diff] [blame] | 277 | if (!sdio_func_present(func)) |
| 278 | return; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 279 | |
Daniel Drake | 3d10a1b | 2009-12-17 15:27:17 -0800 | [diff] [blame] | 280 | device_del(&func->dev); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 281 | put_device(&func->dev); |
| 282 | } |
| 283 | |