Commit | Line | Data |
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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> | |
3ef77af1 | 16 | #include <linux/export.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
80fd933c | 18 | #include <linux/pm_runtime.h> |
f48c767c | 19 | #include <linux/pm_domain.h> |
eed222ac | 20 | #include <linux/acpi.h> |
e29a7d73 PO |
21 | |
22 | #include <linux/mmc/card.h> | |
ed919b01 | 23 | #include <linux/mmc/host.h> |
e29a7d73 | 24 | #include <linux/mmc/sdio_func.h> |
25185f3f | 25 | #include <linux/of.h> |
e29a7d73 | 26 | |
25185f3f | 27 | #include "core.h" |
b1538bcf | 28 | #include "sdio_cis.h" |
e29a7d73 PO |
29 | #include "sdio_bus.h" |
30 | ||
433b7b12 UH |
31 | #define to_sdio_driver(d) container_of(d, struct sdio_driver, drv) |
32 | ||
bcfe66e2 PO |
33 | /* show configuration fields */ |
34 | #define sdio_config_attr(field, format_string) \ | |
35 | static ssize_t \ | |
36 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ | |
37 | { \ | |
38 | struct sdio_func *func; \ | |
39 | \ | |
40 | func = dev_to_sdio_func (dev); \ | |
41 | return sprintf (buf, format_string, func->field); \ | |
f24fc57b GKH |
42 | } \ |
43 | static DEVICE_ATTR_RO(field) | |
bcfe66e2 PO |
44 | |
45 | sdio_config_attr(class, "0x%02x\n"); | |
46 | sdio_config_attr(vendor, "0x%04x\n"); | |
47 | sdio_config_attr(device, "0x%04x\n"); | |
48 | ||
49 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
50 | { | |
51 | struct sdio_func *func = dev_to_sdio_func (dev); | |
52 | ||
53 | return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n", | |
54 | func->class, func->vendor, func->device); | |
55 | } | |
f24fc57b GKH |
56 | static DEVICE_ATTR_RO(modalias); |
57 | ||
58 | static struct attribute *sdio_dev_attrs[] = { | |
59 | &dev_attr_class.attr, | |
60 | &dev_attr_vendor.attr, | |
61 | &dev_attr_device.attr, | |
62 | &dev_attr_modalias.attr, | |
63 | NULL, | |
bcfe66e2 | 64 | }; |
f24fc57b | 65 | ATTRIBUTE_GROUPS(sdio_dev); |
bcfe66e2 | 66 | |
3b38bea0 PO |
67 | static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, |
68 | const struct sdio_device_id *id) | |
69 | { | |
70 | if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) | |
71 | return NULL; | |
72 | if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) | |
73 | return NULL; | |
74 | if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) | |
75 | return NULL; | |
76 | return id; | |
77 | } | |
78 | ||
79 | static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, | |
80 | struct sdio_driver *sdrv) | |
81 | { | |
82 | const struct sdio_device_id *ids; | |
83 | ||
84 | ids = sdrv->id_table; | |
85 | ||
86 | if (ids) { | |
87 | while (ids->class || ids->vendor || ids->device) { | |
88 | if (sdio_match_one(func, ids)) | |
89 | return ids; | |
90 | ids++; | |
91 | } | |
92 | } | |
93 | ||
94 | return NULL; | |
95 | } | |
e29a7d73 | 96 | |
e29a7d73 PO |
97 | static int sdio_bus_match(struct device *dev, struct device_driver *drv) |
98 | { | |
3b38bea0 PO |
99 | struct sdio_func *func = dev_to_sdio_func(dev); |
100 | struct sdio_driver *sdrv = to_sdio_driver(drv); | |
101 | ||
102 | if (sdio_match_device(func, sdrv)) | |
103 | return 1; | |
104 | ||
105 | return 0; | |
e29a7d73 PO |
106 | } |
107 | ||
108 | static int | |
7ac0326c | 109 | sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
e29a7d73 | 110 | { |
d59b66c7 | 111 | struct sdio_func *func = dev_to_sdio_func(dev); |
d59b66c7 | 112 | |
7ac0326c | 113 | if (add_uevent_var(env, |
d59b66c7 PO |
114 | "SDIO_CLASS=%02X", func->class)) |
115 | return -ENOMEM; | |
116 | ||
7ac0326c | 117 | if (add_uevent_var(env, |
d59b66c7 PO |
118 | "SDIO_ID=%04X:%04X", func->vendor, func->device)) |
119 | return -ENOMEM; | |
120 | ||
7ac0326c | 121 | if (add_uevent_var(env, |
d59b66c7 PO |
122 | "MODALIAS=sdio:c%02Xv%04Xd%04X", |
123 | func->class, func->vendor, func->device)) | |
124 | return -ENOMEM; | |
125 | ||
e29a7d73 PO |
126 | return 0; |
127 | } | |
128 | ||
129 | static int sdio_bus_probe(struct device *dev) | |
130 | { | |
3b38bea0 PO |
131 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
132 | struct sdio_func *func = dev_to_sdio_func(dev); | |
133 | const struct sdio_device_id *id; | |
9a08f82b | 134 | int ret; |
3b38bea0 PO |
135 | |
136 | id = sdio_match_device(func, drv); | |
137 | if (!id) | |
138 | return -ENODEV; | |
139 | ||
1ef48e3d UH |
140 | ret = dev_pm_domain_attach(dev, false); |
141 | if (ret == -EPROBE_DEFER) | |
142 | return ret; | |
143 | ||
40bba0c1 OBC |
144 | /* Unbound SDIO functions are always suspended. |
145 | * During probe, the function is set active and the usage count | |
146 | * is incremented. If the driver supports runtime PM, | |
147 | * it should call pm_runtime_put_noidle() in its probe routine and | |
148 | * pm_runtime_get_noresume() in its remove routine. | |
149 | */ | |
ed919b01 OBC |
150 | if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) { |
151 | ret = pm_runtime_get_sync(dev); | |
152 | if (ret < 0) | |
3bffb800 | 153 | goto disable_runtimepm; |
ed919b01 | 154 | } |
40bba0c1 | 155 | |
9a08f82b DV |
156 | /* Set the default block size so the driver is sure it's something |
157 | * sensible. */ | |
158 | sdio_claim_host(func); | |
159 | ret = sdio_set_block_size(func, 0); | |
160 | sdio_release_host(func); | |
161 | if (ret) | |
40bba0c1 OBC |
162 | goto disable_runtimepm; |
163 | ||
164 | ret = drv->probe(func, id); | |
165 | if (ret) | |
166 | goto disable_runtimepm; | |
167 | ||
168 | return 0; | |
9a08f82b | 169 | |
40bba0c1 | 170 | disable_runtimepm: |
ed919b01 OBC |
171 | if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) |
172 | pm_runtime_put_noidle(dev); | |
1ef48e3d | 173 | dev_pm_domain_detach(dev, false); |
40bba0c1 | 174 | return ret; |
e29a7d73 PO |
175 | } |
176 | ||
177 | static int sdio_bus_remove(struct device *dev) | |
178 | { | |
3b38bea0 PO |
179 | struct sdio_driver *drv = to_sdio_driver(dev->driver); |
180 | struct sdio_func *func = dev_to_sdio_func(dev); | |
ed919b01 | 181 | int ret = 0; |
40bba0c1 OBC |
182 | |
183 | /* Make sure card is powered before invoking ->remove() */ | |
ecc02441 OBC |
184 | if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) |
185 | pm_runtime_get_sync(dev); | |
3b38bea0 PO |
186 | |
187 | drv->remove(func); | |
188 | ||
d1496c39 | 189 | if (func->irq_handler) { |
6606110d JP |
190 | pr_warn("WARNING: driver %s did not remove its interrupt handler!\n", |
191 | drv->name); | |
d1496c39 NP |
192 | sdio_claim_host(func); |
193 | sdio_release_irq(func); | |
194 | sdio_release_host(func); | |
195 | } | |
196 | ||
40bba0c1 | 197 | /* First, undo the increment made directly above */ |
ed919b01 OBC |
198 | if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) |
199 | pm_runtime_put_noidle(dev); | |
40bba0c1 OBC |
200 | |
201 | /* Then undo the runtime PM settings in sdio_bus_probe() */ | |
ed919b01 | 202 | if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) |
297c7f2f | 203 | pm_runtime_put_sync(dev); |
40bba0c1 | 204 | |
1ef48e3d UH |
205 | dev_pm_domain_detach(dev, false); |
206 | ||
40bba0c1 | 207 | return ret; |
e29a7d73 PO |
208 | } |
209 | ||
80fd933c | 210 | static const struct dev_pm_ops sdio_bus_pm_ops = { |
573185cc | 211 | SET_SYSTEM_SLEEP_PM_OPS(pm_generic_suspend, pm_generic_resume) |
80fd933c OBC |
212 | SET_RUNTIME_PM_OPS( |
213 | pm_generic_runtime_suspend, | |
214 | pm_generic_runtime_resume, | |
45f0a85c | 215 | NULL |
80fd933c OBC |
216 | ) |
217 | }; | |
218 | ||
e29a7d73 PO |
219 | static struct bus_type sdio_bus_type = { |
220 | .name = "sdio", | |
f24fc57b | 221 | .dev_groups = sdio_dev_groups, |
e29a7d73 PO |
222 | .match = sdio_bus_match, |
223 | .uevent = sdio_bus_uevent, | |
224 | .probe = sdio_bus_probe, | |
225 | .remove = sdio_bus_remove, | |
d99903ca | 226 | .pm = &sdio_bus_pm_ops, |
e29a7d73 PO |
227 | }; |
228 | ||
229 | int sdio_register_bus(void) | |
230 | { | |
231 | return bus_register(&sdio_bus_type); | |
232 | } | |
233 | ||
234 | void sdio_unregister_bus(void) | |
235 | { | |
236 | bus_unregister(&sdio_bus_type); | |
237 | } | |
238 | ||
f76c8515 PO |
239 | /** |
240 | * sdio_register_driver - register a function driver | |
241 | * @drv: SDIO function driver | |
242 | */ | |
243 | int sdio_register_driver(struct sdio_driver *drv) | |
244 | { | |
245 | drv->drv.name = drv->name; | |
246 | drv->drv.bus = &sdio_bus_type; | |
247 | return driver_register(&drv->drv); | |
248 | } | |
249 | EXPORT_SYMBOL_GPL(sdio_register_driver); | |
250 | ||
251 | /** | |
252 | * sdio_unregister_driver - unregister a function driver | |
253 | * @drv: SDIO function driver | |
254 | */ | |
255 | void sdio_unregister_driver(struct sdio_driver *drv) | |
256 | { | |
257 | drv->drv.bus = &sdio_bus_type; | |
258 | driver_unregister(&drv->drv); | |
259 | } | |
260 | EXPORT_SYMBOL_GPL(sdio_unregister_driver); | |
261 | ||
e29a7d73 PO |
262 | static void sdio_release_func(struct device *dev) |
263 | { | |
264 | struct sdio_func *func = dev_to_sdio_func(dev); | |
b1538bcf | 265 | |
1a632f8c | 266 | sdio_free_func_cis(func); |
e29a7d73 | 267 | |
4c42d6cc | 268 | kfree(func->info); |
759bdc7a | 269 | |
e29a7d73 PO |
270 | kfree(func); |
271 | } | |
272 | ||
273 | /* | |
274 | * Allocate and initialise a new SDIO function structure. | |
275 | */ | |
276 | struct sdio_func *sdio_alloc_func(struct mmc_card *card) | |
277 | { | |
278 | struct sdio_func *func; | |
279 | ||
9f2fcf99 | 280 | func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL); |
e29a7d73 PO |
281 | if (!func) |
282 | return ERR_PTR(-ENOMEM); | |
283 | ||
e29a7d73 PO |
284 | func->card = card; |
285 | ||
286 | device_initialize(&func->dev); | |
287 | ||
288 | func->dev.parent = &card->dev; | |
289 | func->dev.bus = &sdio_bus_type; | |
290 | func->dev.release = sdio_release_func; | |
291 | ||
292 | return func; | |
293 | } | |
294 | ||
eed222ac AL |
295 | #ifdef CONFIG_ACPI |
296 | static void sdio_acpi_set_handle(struct sdio_func *func) | |
297 | { | |
298 | struct mmc_host *host = func->card->host; | |
51d34606 | 299 | u64 addr = ((u64)host->slotno << 16) | func->num; |
eed222ac | 300 | |
9c5ad36d | 301 | acpi_preset_companion(&func->dev, ACPI_COMPANION(host->parent), addr); |
eed222ac AL |
302 | } |
303 | #else | |
304 | static inline void sdio_acpi_set_handle(struct sdio_func *func) {} | |
305 | #endif | |
306 | ||
25185f3f SH |
307 | static void sdio_set_of_node(struct sdio_func *func) |
308 | { | |
309 | struct mmc_host *host = func->card->host; | |
310 | ||
311 | func->dev.of_node = mmc_of_find_child_device(host, func->num); | |
312 | } | |
313 | ||
e29a7d73 PO |
314 | /* |
315 | * Register a new SDIO function with the driver model. | |
316 | */ | |
317 | int sdio_add_func(struct sdio_func *func) | |
318 | { | |
319 | int ret; | |
320 | ||
d1b26863 | 321 | dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num); |
e29a7d73 | 322 | |
25185f3f | 323 | sdio_set_of_node(func); |
eed222ac | 324 | sdio_acpi_set_handle(func); |
ec076cd2 | 325 | device_enable_async_suspend(&func->dev); |
e29a7d73 | 326 | ret = device_add(&func->dev); |
1ef48e3d | 327 | if (ret == 0) |
e29a7d73 PO |
328 | sdio_func_set_present(func); |
329 | ||
330 | return ret; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Unregister a SDIO function with the driver model, and | |
335 | * (eventually) free it. | |
3d10a1ba DD |
336 | * This function can be called through error paths where sdio_add_func() was |
337 | * never executed (because a failure occurred at an earlier point). | |
e29a7d73 PO |
338 | */ |
339 | void sdio_remove_func(struct sdio_func *func) | |
340 | { | |
3d10a1ba DD |
341 | if (!sdio_func_present(func)) |
342 | return; | |
e29a7d73 | 343 | |
3d10a1ba | 344 | device_del(&func->dev); |
25185f3f | 345 | of_node_put(func->dev.of_node); |
e29a7d73 PO |
346 | put_device(&func->dev); |
347 | } | |
348 |