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e29a7d73 PO |
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 | ||
b1538bcf | 20 | #include "sdio_cis.h" |
e29a7d73 PO |
21 | #include "sdio_bus.h" |
22 | ||
23 | #define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) | |
3b38bea0 PO |
24 | #define to_sdio_driver(d) container_of(d, struct sdio_driver, drv) |
25 | ||
bcfe66e2 PO |
26 | /* show configuration fields */ |
27 | #define sdio_config_attr(field, format_string) \ | |
28 | static ssize_t \ | |
29 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ | |
30 | { \ | |
31 | struct sdio_func *func; \ | |
32 | \ | |
33 | func = dev_to_sdio_func (dev); \ | |
34 | return sprintf (buf, format_string, func->field); \ | |
35 | } | |
36 | ||
37 | sdio_config_attr(class, "0x%02x\n"); | |
38 | sdio_config_attr(vendor, "0x%04x\n"); | |
39 | sdio_config_attr(device, "0x%04x\n"); | |
40 | ||
41 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
42 | { | |
43 | struct sdio_func *func = dev_to_sdio_func (dev); | |
44 | ||
45 | return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n", | |
46 | func->class, func->vendor, func->device); | |
47 | } | |
48 | ||
22bfc979 | 49 | static struct device_attribute sdio_dev_attrs[] = { |
bcfe66e2 PO |
50 | __ATTR_RO(class), |
51 | __ATTR_RO(vendor), | |
52 | __ATTR_RO(device), | |
53 | __ATTR_RO(modalias), | |
54 | __ATTR_NULL, | |
55 | }; | |
56 | ||
3b38bea0 PO |
57 | static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, |
58 | const struct sdio_device_id *id) | |
59 | { | |
60 | if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) | |
61 | return NULL; | |
62 | if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) | |
63 | return NULL; | |
64 | if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) | |
65 | return NULL; | |
66 | return id; | |
67 | } | |
68 | ||
69 | static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, | |
70 | struct sdio_driver *sdrv) | |
71 | { | |
72 | const struct sdio_device_id *ids; | |
73 | ||
74 | ids = sdrv->id_table; | |
75 | ||
76 | if (ids) { | |
77 | while (ids->class || ids->vendor || ids->device) { | |
78 | if (sdio_match_one(func, ids)) | |
79 | return ids; | |
80 | ids++; | |
81 | } | |
82 | } | |
83 | ||
84 | return NULL; | |
85 | } | |
e29a7d73 | 86 | |
e29a7d73 PO |
87 | static int sdio_bus_match(struct device *dev, struct device_driver *drv) |
88 | { | |
3b38bea0 PO |
89 | struct sdio_func *func = dev_to_sdio_func(dev); |
90 | struct sdio_driver *sdrv = to_sdio_driver(drv); | |
91 | ||
92 | if (sdio_match_device(func, sdrv)) | |
93 | return 1; | |
94 | ||
95 | return 0; | |
e29a7d73 PO |
96 | } |
97 | ||
98 | static int | |
7ac0326c | 99 | sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
e29a7d73 | 100 | { |
d59b66c7 | 101 | struct sdio_func *func = dev_to_sdio_func(dev); |
d59b66c7 | 102 | |
7ac0326c | 103 | if (add_uevent_var(env, |
d59b66c7 PO |
104 | "SDIO_CLASS=%02X", func->class)) |
105 | return -ENOMEM; | |
106 | ||
7ac0326c | 107 | if (add_uevent_var(env, |
d59b66c7 PO |
108 | "SDIO_ID=%04X:%04X", func->vendor, func->device)) |
109 | return -ENOMEM; | |
110 | ||
7ac0326c | 111 | if (add_uevent_var(env, |
d59b66c7 PO |
112 | "MODALIAS=sdio:c%02Xv%04Xd%04X", |
113 | func->class, func->vendor, func->device)) | |
114 | return -ENOMEM; | |
115 | ||
e29a7d73 PO |
116 | return 0; |
117 | } | |
118 | ||
119 | static int sdio_bus_probe(struct device *dev) | |
120 | { | |
3b38bea0 PO |
121 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
122 | struct sdio_func *func = dev_to_sdio_func(dev); | |
123 | const struct sdio_device_id *id; | |
9a08f82b | 124 | int ret; |
3b38bea0 PO |
125 | |
126 | id = sdio_match_device(func, drv); | |
127 | if (!id) | |
128 | return -ENODEV; | |
129 | ||
9a08f82b DV |
130 | /* Set the default block size so the driver is sure it's something |
131 | * sensible. */ | |
132 | sdio_claim_host(func); | |
133 | ret = sdio_set_block_size(func, 0); | |
134 | sdio_release_host(func); | |
135 | if (ret) | |
136 | return ret; | |
137 | ||
3b38bea0 | 138 | return drv->probe(func, id); |
e29a7d73 PO |
139 | } |
140 | ||
141 | static int sdio_bus_remove(struct device *dev) | |
142 | { | |
3b38bea0 PO |
143 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
144 | struct sdio_func *func = dev_to_sdio_func(dev); | |
145 | ||
146 | drv->remove(func); | |
147 | ||
d1496c39 NP |
148 | if (func->irq_handler) { |
149 | printk(KERN_WARNING "WARNING: driver %s did not remove " | |
150 | "its interrupt handler!\n", drv->name); | |
151 | sdio_claim_host(func); | |
152 | sdio_release_irq(func); | |
153 | sdio_release_host(func); | |
154 | } | |
155 | ||
e29a7d73 PO |
156 | return 0; |
157 | } | |
158 | ||
159 | static struct bus_type sdio_bus_type = { | |
160 | .name = "sdio", | |
bcfe66e2 | 161 | .dev_attrs = sdio_dev_attrs, |
e29a7d73 PO |
162 | .match = sdio_bus_match, |
163 | .uevent = sdio_bus_uevent, | |
164 | .probe = sdio_bus_probe, | |
165 | .remove = sdio_bus_remove, | |
166 | }; | |
167 | ||
168 | int sdio_register_bus(void) | |
169 | { | |
170 | return bus_register(&sdio_bus_type); | |
171 | } | |
172 | ||
173 | void sdio_unregister_bus(void) | |
174 | { | |
175 | bus_unregister(&sdio_bus_type); | |
176 | } | |
177 | ||
f76c8515 PO |
178 | /** |
179 | * sdio_register_driver - register a function driver | |
180 | * @drv: SDIO function driver | |
181 | */ | |
182 | int sdio_register_driver(struct sdio_driver *drv) | |
183 | { | |
184 | drv->drv.name = drv->name; | |
185 | drv->drv.bus = &sdio_bus_type; | |
186 | return driver_register(&drv->drv); | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(sdio_register_driver); | |
189 | ||
190 | /** | |
191 | * sdio_unregister_driver - unregister a function driver | |
192 | * @drv: SDIO function driver | |
193 | */ | |
194 | void sdio_unregister_driver(struct sdio_driver *drv) | |
195 | { | |
196 | drv->drv.bus = &sdio_bus_type; | |
197 | driver_unregister(&drv->drv); | |
198 | } | |
199 | EXPORT_SYMBOL_GPL(sdio_unregister_driver); | |
200 | ||
e29a7d73 PO |
201 | static void sdio_release_func(struct device *dev) |
202 | { | |
203 | struct sdio_func *func = dev_to_sdio_func(dev); | |
b1538bcf | 204 | |
1a632f8c | 205 | sdio_free_func_cis(func); |
e29a7d73 | 206 | |
759bdc7a PO |
207 | if (func->info) |
208 | kfree(func->info); | |
209 | ||
e29a7d73 PO |
210 | kfree(func); |
211 | } | |
212 | ||
213 | /* | |
214 | * Allocate and initialise a new SDIO function structure. | |
215 | */ | |
216 | struct sdio_func *sdio_alloc_func(struct mmc_card *card) | |
217 | { | |
218 | struct sdio_func *func; | |
219 | ||
9f2fcf99 | 220 | func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL); |
e29a7d73 PO |
221 | if (!func) |
222 | return ERR_PTR(-ENOMEM); | |
223 | ||
e29a7d73 PO |
224 | func->card = card; |
225 | ||
226 | device_initialize(&func->dev); | |
227 | ||
228 | func->dev.parent = &card->dev; | |
229 | func->dev.bus = &sdio_bus_type; | |
230 | func->dev.release = sdio_release_func; | |
231 | ||
232 | return func; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Register a new SDIO function with the driver model. | |
237 | */ | |
238 | int sdio_add_func(struct sdio_func *func) | |
239 | { | |
240 | int ret; | |
241 | ||
242 | snprintf(func->dev.bus_id, sizeof(func->dev.bus_id), | |
243 | "%s:%d", mmc_card_id(func->card), func->num); | |
244 | ||
245 | ret = device_add(&func->dev); | |
246 | if (ret == 0) | |
247 | sdio_func_set_present(func); | |
248 | ||
249 | return ret; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Unregister a SDIO function with the driver model, and | |
254 | * (eventually) free it. | |
255 | */ | |
256 | void sdio_remove_func(struct sdio_func *func) | |
257 | { | |
258 | if (sdio_func_present(func)) | |
259 | device_del(&func->dev); | |
260 | ||
261 | put_device(&func->dev); | |
262 | } | |
263 |