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10#include <linux/device.h>
11#include <linux/err.h>
12#include <linux/export.h>
13#include <linux/slab.h>
14#include <linux/pm_runtime.h>
15#include <linux/pm_domain.h>
16#include <linux/acpi.h>
17
18#include <linux/mmc/card.h>
19#include <linux/mmc/host.h>
20#include <linux/mmc/sdio_func.h>
21#include <linux/of.h>
22
23#include "core.h"
24#include "card.h"
25#include "sdio_cis.h"
26#include "sdio_bus.h"
27
28#define to_sdio_driver(d) container_of(d, struct sdio_driver, drv)
29
30
31#define sdio_config_attr(field, format_string, args...) \
32static ssize_t \
33field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
34{ \
35 struct sdio_func *func; \
36 \
37 func = dev_to_sdio_func (dev); \
38 return sprintf(buf, format_string, args); \
39} \
40static DEVICE_ATTR_RO(field)
41
42sdio_config_attr(class, "0x%02x\n", func->class);
43sdio_config_attr(vendor, "0x%04x\n", func->vendor);
44sdio_config_attr(device, "0x%04x\n", func->device);
45sdio_config_attr(revision, "%u.%u\n", func->major_rev, func->minor_rev);
46sdio_config_attr(modalias, "sdio:c%02Xv%04Xd%04X\n", func->class, func->vendor, func->device);
47
48#define sdio_info_attr(num) \
49static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \
50{ \
51 struct sdio_func *func = dev_to_sdio_func(dev); \
52 \
53 if (num > func->num_info) \
54 return -ENODATA; \
55 if (!func->info[num-1][0]) \
56 return 0; \
57 return sprintf(buf, "%s\n", func->info[num-1]); \
58} \
59static DEVICE_ATTR_RO(info##num)
60
61sdio_info_attr(1);
62sdio_info_attr(2);
63sdio_info_attr(3);
64sdio_info_attr(4);
65
66static struct attribute *sdio_dev_attrs[] = {
67 &dev_attr_class.attr,
68 &dev_attr_vendor.attr,
69 &dev_attr_device.attr,
70 &dev_attr_revision.attr,
71 &dev_attr_info1.attr,
72 &dev_attr_info2.attr,
73 &dev_attr_info3.attr,
74 &dev_attr_info4.attr,
75 &dev_attr_modalias.attr,
76 NULL,
77};
78ATTRIBUTE_GROUPS(sdio_dev);
79
80static const struct sdio_device_id *sdio_match_one(struct sdio_func *func,
81 const struct sdio_device_id *id)
82{
83 if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class)
84 return NULL;
85 if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor)
86 return NULL;
87 if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device)
88 return NULL;
89 return id;
90}
91
92static const struct sdio_device_id *sdio_match_device(struct sdio_func *func,
93 struct sdio_driver *sdrv)
94{
95 const struct sdio_device_id *ids;
96
97 ids = sdrv->id_table;
98
99 if (ids) {
100 while (ids->class || ids->vendor || ids->device) {
101 if (sdio_match_one(func, ids))
102 return ids;
103 ids++;
104 }
105 }
106
107 return NULL;
108}
109
110static int sdio_bus_match(struct device *dev, struct device_driver *drv)
111{
112 struct sdio_func *func = dev_to_sdio_func(dev);
113 struct sdio_driver *sdrv = to_sdio_driver(drv);
114
115 if (sdio_match_device(func, sdrv))
116 return 1;
117
118 return 0;
119}
120
121static int
122sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
123{
124 struct sdio_func *func = dev_to_sdio_func(dev);
125 unsigned int i;
126
127 if (add_uevent_var(env,
128 "SDIO_CLASS=%02X", func->class))
129 return -ENOMEM;
130
131 if (add_uevent_var(env,
132 "SDIO_ID=%04X:%04X", func->vendor, func->device))
133 return -ENOMEM;
134
135 if (add_uevent_var(env,
136 "SDIO_REVISION=%u.%u", func->major_rev, func->minor_rev))
137 return -ENOMEM;
138
139 for (i = 0; i < func->num_info; i++) {
140 if (add_uevent_var(env, "SDIO_INFO%u=%s", i+1, func->info[i]))
141 return -ENOMEM;
142 }
143
144 if (add_uevent_var(env,
145 "MODALIAS=sdio:c%02Xv%04Xd%04X",
146 func->class, func->vendor, func->device))
147 return -ENOMEM;
148
149 return 0;
150}
151
152static int sdio_bus_probe(struct device *dev)
153{
154 struct sdio_driver *drv = to_sdio_driver(dev->driver);
155 struct sdio_func *func = dev_to_sdio_func(dev);
156 const struct sdio_device_id *id;
157 int ret;
158
159 id = sdio_match_device(func, drv);
160 if (!id)
161 return -ENODEV;
162
163 ret = dev_pm_domain_attach(dev, false);
164 if (ret)
165 return ret;
166
167 atomic_inc(&func->card->sdio_funcs_probed);
168
169
170
171
172
173
174
175 if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) {
176 ret = pm_runtime_get_sync(dev);
177 if (ret < 0)
178 goto disable_runtimepm;
179 }
180
181
182
183 sdio_claim_host(func);
184 if (mmc_card_removed(func->card))
185 ret = -ENOMEDIUM;
186 else
187 ret = sdio_set_block_size(func, 0);
188 sdio_release_host(func);
189 if (ret)
190 goto disable_runtimepm;
191
192 ret = drv->probe(func, id);
193 if (ret)
194 goto disable_runtimepm;
195
196 return 0;
197
198disable_runtimepm:
199 atomic_dec(&func->card->sdio_funcs_probed);
200 if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
201 pm_runtime_put_noidle(dev);
202 dev_pm_domain_detach(dev, false);
203 return ret;
204}
205
206static void sdio_bus_remove(struct device *dev)
207{
208 struct sdio_driver *drv = to_sdio_driver(dev->driver);
209 struct sdio_func *func = dev_to_sdio_func(dev);
210
211
212 if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
213 pm_runtime_get_sync(dev);
214
215 drv->remove(func);
216 atomic_dec(&func->card->sdio_funcs_probed);
217
218 if (func->irq_handler) {
219 pr_warn("WARNING: driver %s did not remove its interrupt handler!\n",
220 drv->name);
221 sdio_claim_host(func);
222 sdio_release_irq(func);
223 sdio_release_host(func);
224 }
225
226
227 if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
228 pm_runtime_put_noidle(dev);
229
230
231 if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
232 pm_runtime_put_sync(dev);
233
234 dev_pm_domain_detach(dev, false);
235}
236
237static const struct dev_pm_ops sdio_bus_pm_ops = {
238 SET_SYSTEM_SLEEP_PM_OPS(pm_generic_suspend, pm_generic_resume)
239 SET_RUNTIME_PM_OPS(
240 pm_generic_runtime_suspend,
241 pm_generic_runtime_resume,
242 NULL
243 )
244};
245
246static struct bus_type sdio_bus_type = {
247 .name = "sdio",
248 .dev_groups = sdio_dev_groups,
249 .match = sdio_bus_match,
250 .uevent = sdio_bus_uevent,
251 .probe = sdio_bus_probe,
252 .remove = sdio_bus_remove,
253 .pm = &sdio_bus_pm_ops,
254};
255
256int sdio_register_bus(void)
257{
258 return bus_register(&sdio_bus_type);
259}
260
261void sdio_unregister_bus(void)
262{
263 bus_unregister(&sdio_bus_type);
264}
265
266
267
268
269
270int sdio_register_driver(struct sdio_driver *drv)
271{
272 drv->drv.name = drv->name;
273 drv->drv.bus = &sdio_bus_type;
274 return driver_register(&drv->drv);
275}
276EXPORT_SYMBOL_GPL(sdio_register_driver);
277
278
279
280
281
282void sdio_unregister_driver(struct sdio_driver *drv)
283{
284 drv->drv.bus = &sdio_bus_type;
285 driver_unregister(&drv->drv);
286}
287EXPORT_SYMBOL_GPL(sdio_unregister_driver);
288
289static void sdio_release_func(struct device *dev)
290{
291 struct sdio_func *func = dev_to_sdio_func(dev);
292
293 sdio_free_func_cis(func);
294
295 kfree(func->info);
296 kfree(func->tmpbuf);
297 kfree(func);
298}
299
300
301
302
303struct sdio_func *sdio_alloc_func(struct mmc_card *card)
304{
305 struct sdio_func *func;
306
307 func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL);
308 if (!func)
309 return ERR_PTR(-ENOMEM);
310
311
312
313
314
315 func->tmpbuf = kmalloc(4, GFP_KERNEL);
316 if (!func->tmpbuf) {
317 kfree(func);
318 return ERR_PTR(-ENOMEM);
319 }
320
321 func->card = card;
322
323 device_initialize(&func->dev);
324
325 func->dev.parent = &card->dev;
326 func->dev.bus = &sdio_bus_type;
327 func->dev.release = sdio_release_func;
328
329 return func;
330}
331
332#ifdef CONFIG_ACPI
333static void sdio_acpi_set_handle(struct sdio_func *func)
334{
335 struct mmc_host *host = func->card->host;
336 u64 addr = ((u64)host->slotno << 16) | func->num;
337
338 acpi_preset_companion(&func->dev, ACPI_COMPANION(host->parent), addr);
339}
340#else
341static inline void sdio_acpi_set_handle(struct sdio_func *func) {}
342#endif
343
344static void sdio_set_of_node(struct sdio_func *func)
345{
346 struct mmc_host *host = func->card->host;
347
348 func->dev.of_node = mmc_of_find_child_device(host, func->num);
349}
350
351
352
353
354int sdio_add_func(struct sdio_func *func)
355{
356 int ret;
357
358 dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num);
359
360 sdio_set_of_node(func);
361 sdio_acpi_set_handle(func);
362 device_enable_async_suspend(&func->dev);
363 ret = device_add(&func->dev);
364 if (ret == 0)
365 sdio_func_set_present(func);
366
367 return ret;
368}
369
370
371
372
373
374
375
376void sdio_remove_func(struct sdio_func *func)
377{
378 if (!sdio_func_present(func))
379 return;
380
381 device_del(&func->dev);
382 of_node_put(func->dev.of_node);
383 put_device(&func->dev);
384}
385
386