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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 | ||
bcfe66e2 PO |
23 | /* show configuration fields */ |
24 | #define sdio_config_attr(field, format_string) \ | |
25 | static ssize_t \ | |
26 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ | |
27 | { \ | |
28 | struct sdio_func *func; \ | |
29 | \ | |
30 | func = dev_to_sdio_func (dev); \ | |
31 | return sprintf (buf, format_string, func->field); \ | |
32 | } | |
33 | ||
34 | sdio_config_attr(class, "0x%02x\n"); | |
35 | sdio_config_attr(vendor, "0x%04x\n"); | |
36 | sdio_config_attr(device, "0x%04x\n"); | |
37 | ||
38 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
39 | { | |
40 | struct sdio_func *func = dev_to_sdio_func (dev); | |
41 | ||
42 | return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n", | |
43 | func->class, func->vendor, func->device); | |
44 | } | |
45 | ||
22bfc979 | 46 | static struct device_attribute sdio_dev_attrs[] = { |
bcfe66e2 PO |
47 | __ATTR_RO(class), |
48 | __ATTR_RO(vendor), | |
49 | __ATTR_RO(device), | |
50 | __ATTR_RO(modalias), | |
51 | __ATTR_NULL, | |
52 | }; | |
53 | ||
3b38bea0 PO |
54 | static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, |
55 | const struct sdio_device_id *id) | |
56 | { | |
57 | if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) | |
58 | return NULL; | |
59 | if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) | |
60 | return NULL; | |
61 | if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) | |
62 | return NULL; | |
63 | return id; | |
64 | } | |
65 | ||
66 | static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, | |
67 | struct sdio_driver *sdrv) | |
68 | { | |
69 | const struct sdio_device_id *ids; | |
70 | ||
71 | ids = sdrv->id_table; | |
72 | ||
73 | if (ids) { | |
74 | while (ids->class || ids->vendor || ids->device) { | |
75 | if (sdio_match_one(func, ids)) | |
76 | return ids; | |
77 | ids++; | |
78 | } | |
79 | } | |
80 | ||
81 | return NULL; | |
82 | } | |
e29a7d73 | 83 | |
e29a7d73 PO |
84 | static int sdio_bus_match(struct device *dev, struct device_driver *drv) |
85 | { | |
3b38bea0 PO |
86 | struct sdio_func *func = dev_to_sdio_func(dev); |
87 | struct sdio_driver *sdrv = to_sdio_driver(drv); | |
88 | ||
89 | if (sdio_match_device(func, sdrv)) | |
90 | return 1; | |
91 | ||
92 | return 0; | |
e29a7d73 PO |
93 | } |
94 | ||
95 | static int | |
7ac0326c | 96 | sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
e29a7d73 | 97 | { |
d59b66c7 | 98 | struct sdio_func *func = dev_to_sdio_func(dev); |
d59b66c7 | 99 | |
7ac0326c | 100 | if (add_uevent_var(env, |
d59b66c7 PO |
101 | "SDIO_CLASS=%02X", func->class)) |
102 | return -ENOMEM; | |
103 | ||
7ac0326c | 104 | if (add_uevent_var(env, |
d59b66c7 PO |
105 | "SDIO_ID=%04X:%04X", func->vendor, func->device)) |
106 | return -ENOMEM; | |
107 | ||
7ac0326c | 108 | if (add_uevent_var(env, |
d59b66c7 PO |
109 | "MODALIAS=sdio:c%02Xv%04Xd%04X", |
110 | func->class, func->vendor, func->device)) | |
111 | return -ENOMEM; | |
112 | ||
e29a7d73 PO |
113 | return 0; |
114 | } | |
115 | ||
116 | static int sdio_bus_probe(struct device *dev) | |
117 | { | |
3b38bea0 PO |
118 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
119 | struct sdio_func *func = dev_to_sdio_func(dev); | |
120 | const struct sdio_device_id *id; | |
9a08f82b | 121 | int ret; |
3b38bea0 PO |
122 | |
123 | id = sdio_match_device(func, drv); | |
124 | if (!id) | |
125 | return -ENODEV; | |
126 | ||
9a08f82b DV |
127 | /* Set the default block size so the driver is sure it's something |
128 | * sensible. */ | |
129 | sdio_claim_host(func); | |
130 | ret = sdio_set_block_size(func, 0); | |
131 | sdio_release_host(func); | |
132 | if (ret) | |
133 | return ret; | |
134 | ||
3b38bea0 | 135 | return drv->probe(func, id); |
e29a7d73 PO |
136 | } |
137 | ||
138 | static int sdio_bus_remove(struct device *dev) | |
139 | { | |
3b38bea0 PO |
140 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
141 | struct sdio_func *func = dev_to_sdio_func(dev); | |
142 | ||
143 | drv->remove(func); | |
144 | ||
d1496c39 NP |
145 | if (func->irq_handler) { |
146 | printk(KERN_WARNING "WARNING: driver %s did not remove " | |
147 | "its interrupt handler!\n", drv->name); | |
148 | sdio_claim_host(func); | |
149 | sdio_release_irq(func); | |
150 | sdio_release_host(func); | |
151 | } | |
152 | ||
e29a7d73 PO |
153 | return 0; |
154 | } | |
155 | ||
156 | static struct bus_type sdio_bus_type = { | |
157 | .name = "sdio", | |
bcfe66e2 | 158 | .dev_attrs = sdio_dev_attrs, |
e29a7d73 PO |
159 | .match = sdio_bus_match, |
160 | .uevent = sdio_bus_uevent, | |
161 | .probe = sdio_bus_probe, | |
162 | .remove = sdio_bus_remove, | |
163 | }; | |
164 | ||
165 | int sdio_register_bus(void) | |
166 | { | |
167 | return bus_register(&sdio_bus_type); | |
168 | } | |
169 | ||
170 | void sdio_unregister_bus(void) | |
171 | { | |
172 | bus_unregister(&sdio_bus_type); | |
173 | } | |
174 | ||
f76c8515 PO |
175 | /** |
176 | * sdio_register_driver - register a function driver | |
177 | * @drv: SDIO function driver | |
178 | */ | |
179 | int sdio_register_driver(struct sdio_driver *drv) | |
180 | { | |
181 | drv->drv.name = drv->name; | |
182 | drv->drv.bus = &sdio_bus_type; | |
183 | return driver_register(&drv->drv); | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(sdio_register_driver); | |
186 | ||
187 | /** | |
188 | * sdio_unregister_driver - unregister a function driver | |
189 | * @drv: SDIO function driver | |
190 | */ | |
191 | void sdio_unregister_driver(struct sdio_driver *drv) | |
192 | { | |
193 | drv->drv.bus = &sdio_bus_type; | |
194 | driver_unregister(&drv->drv); | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(sdio_unregister_driver); | |
197 | ||
e29a7d73 PO |
198 | static void sdio_release_func(struct device *dev) |
199 | { | |
200 | struct sdio_func *func = dev_to_sdio_func(dev); | |
b1538bcf | 201 | |
1a632f8c | 202 | sdio_free_func_cis(func); |
e29a7d73 | 203 | |
759bdc7a PO |
204 | if (func->info) |
205 | kfree(func->info); | |
206 | ||
e29a7d73 PO |
207 | kfree(func); |
208 | } | |
209 | ||
210 | /* | |
211 | * Allocate and initialise a new SDIO function structure. | |
212 | */ | |
213 | struct sdio_func *sdio_alloc_func(struct mmc_card *card) | |
214 | { | |
215 | struct sdio_func *func; | |
216 | ||
9f2fcf99 | 217 | func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL); |
e29a7d73 PO |
218 | if (!func) |
219 | return ERR_PTR(-ENOMEM); | |
220 | ||
e29a7d73 PO |
221 | func->card = card; |
222 | ||
223 | device_initialize(&func->dev); | |
224 | ||
225 | func->dev.parent = &card->dev; | |
226 | func->dev.bus = &sdio_bus_type; | |
227 | func->dev.release = sdio_release_func; | |
228 | ||
229 | return func; | |
230 | } | |
231 | ||
232 | /* | |
233 | * Register a new SDIO function with the driver model. | |
234 | */ | |
235 | int sdio_add_func(struct sdio_func *func) | |
236 | { | |
237 | int ret; | |
238 | ||
d1b26863 | 239 | dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num); |
e29a7d73 PO |
240 | |
241 | ret = device_add(&func->dev); | |
242 | if (ret == 0) | |
243 | sdio_func_set_present(func); | |
244 | ||
245 | return ret; | |
246 | } | |
247 | ||
248 | /* | |
249 | * Unregister a SDIO function with the driver model, and | |
250 | * (eventually) free it. | |
251 | */ | |
252 | void sdio_remove_func(struct sdio_func *func) | |
253 | { | |
254 | if (sdio_func_present(func)) | |
255 | device_del(&func->dev); | |
256 | ||
257 | put_device(&func->dev); | |
258 | } | |
259 |