1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
|
/*
* Secure Digital Host Controller Interface ACPI driver.
*
* Copyright (c) 2012, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/init.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/compiler.h>
#include <linux/stddef.h>
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/acpi.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/mmc/host.h>
#include <linux/mmc/pm.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/mmc/sdhci.h>
#include "sdhci.h"
enum {
SDHCI_ACPI_SD_CD = BIT(0),
SDHCI_ACPI_RUNTIME_PM = BIT(1),
SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
};
struct sdhci_acpi_chip {
const struct sdhci_ops *ops;
unsigned int quirks;
unsigned int quirks2;
unsigned long caps;
unsigned int caps2;
mmc_pm_flag_t pm_caps;
};
struct sdhci_acpi_slot {
const struct sdhci_acpi_chip *chip;
unsigned int quirks;
unsigned int quirks2;
unsigned long caps;
unsigned int caps2;
mmc_pm_flag_t pm_caps;
unsigned int flags;
};
struct sdhci_acpi_host {
struct sdhci_host *host;
const struct sdhci_acpi_slot *slot;
struct platform_device *pdev;
bool use_runtime_pm;
};
static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
{
return c->slot && (c->slot->flags & flag);
}
static int sdhci_acpi_enable_dma(struct sdhci_host *host)
{
return 0;
}
static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
{
u8 reg;
reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
reg |= 0x10;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
/* For eMMC, minimum is 1us but give it 9us for good measure */
udelay(9);
reg &= ~0x10;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
/* For eMMC, minimum is 200us but give it 300us for good measure */
usleep_range(300, 1000);
}
static const struct sdhci_ops sdhci_acpi_ops_dflt = {
.set_clock = sdhci_set_clock,
.enable_dma = sdhci_acpi_enable_dma,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
};
static const struct sdhci_ops sdhci_acpi_ops_int = {
.set_clock = sdhci_set_clock,
.enable_dma = sdhci_acpi_enable_dma,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.hw_reset = sdhci_acpi_int_hw_reset,
};
static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
.ops = &sdhci_acpi_ops_int,
};
static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
.chip = &sdhci_acpi_chip_int,
.caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR,
.caps2 = MMC_CAP2_HC_ERASE_SZ,
.flags = SDHCI_ACPI_RUNTIME_PM,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
};
static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
.caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD,
.flags = SDHCI_ACPI_RUNTIME_PM,
.pm_caps = MMC_PM_KEEP_POWER,
};
static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
.flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
SDHCI_ACPI_RUNTIME_PM,
.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON,
};
struct sdhci_acpi_uid_slot {
const char *hid;
const char *uid;
const struct sdhci_acpi_slot *slot;
};
static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
{ "PNP0D40" },
{ },
};
static const struct acpi_device_id sdhci_acpi_ids[] = {
{ "80860F14" },
{ "80860F16" },
{ "INT33BB" },
{ "INT33C6" },
{ "INT3436" },
{ "PNP0D40" },
{ },
};
MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
static const struct sdhci_acpi_slot *sdhci_acpi_get_slot_by_ids(const char *hid,
const char *uid)
{
const struct sdhci_acpi_uid_slot *u;
for (u = sdhci_acpi_uids; u->hid; u++) {
if (strcmp(u->hid, hid))
continue;
if (!u->uid)
return u->slot;
if (uid && !strcmp(u->uid, uid))
return u->slot;
}
return NULL;
}
static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(acpi_handle handle,
const char *hid)
{
const struct sdhci_acpi_slot *slot;
struct acpi_device_info *info;
const char *uid = NULL;
acpi_status status;
status = acpi_get_object_info(handle, &info);
if (!ACPI_FAILURE(status) && (info->valid & ACPI_VALID_UID))
uid = info->unique_id.string;
slot = sdhci_acpi_get_slot_by_ids(hid, uid);
kfree(info);
return slot;
}
static int sdhci_acpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
acpi_handle handle = ACPI_HANDLE(dev);
struct acpi_device *device;
struct sdhci_acpi_host *c;
struct sdhci_host *host;
struct resource *iomem;
resource_size_t len;
const char *hid;
int err;
if (acpi_bus_get_device(handle, &device))
return -ENODEV;
if (acpi_bus_get_status(device) || !device->status.present)
return -ENODEV;
hid = acpi_device_hid(device);
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem)
return -ENOMEM;
len = resource_size(iomem);
if (len < 0x100)
dev_err(dev, "Invalid iomem size!\n");
if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
return -ENOMEM;
host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
if (IS_ERR(host))
return PTR_ERR(host);
c = sdhci_priv(host);
c->host = host;
c->slot = sdhci_acpi_get_slot(handle, hid);
c->pdev = pdev;
c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
platform_set_drvdata(pdev, c);
host->hw_name = "ACPI";
host->ops = &sdhci_acpi_ops_dflt;
host->irq = platform_get_irq(pdev, 0);
host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
resource_size(iomem));
if (host->ioaddr == NULL) {
err = -ENOMEM;
goto err_free;
}
if (!dev->dma_mask) {
u64 dma_mask;
if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) {
/* 64-bit DMA is not supported at present */
dma_mask = DMA_BIT_MASK(32);
} else {
dma_mask = DMA_BIT_MASK(32);
}
err = dma_coerce_mask_and_coherent(dev, dma_mask);
if (err)
goto err_free;
}
if (c->slot) {
if (c->slot->chip) {
host->ops = c->slot->chip->ops;
host->quirks |= c->slot->chip->quirks;
host->quirks2 |= c->slot->chip->quirks2;
host->mmc->caps |= c->slot->chip->caps;
host->mmc->caps2 |= c->slot->chip->caps2;
host->mmc->pm_caps |= c->slot->chip->pm_caps;
}
host->quirks |= c->slot->quirks;
host->quirks2 |= c->slot->quirks2;
host->mmc->caps |= c->slot->caps;
host->mmc->caps2 |= c->slot->caps2;
host->mmc->pm_caps |= c->slot->pm_caps;
}
host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0)) {
dev_warn(dev, "failed to setup card detect gpio\n");
c->use_runtime_pm = false;
}
}
err = sdhci_add_host(host);
if (err)
goto err_free;
if (c->use_runtime_pm) {
pm_runtime_set_active(dev);
pm_suspend_ignore_children(dev, 1);
pm_runtime_set_autosuspend_delay(dev, 50);
pm_runtime_use_autosuspend(dev);
pm_runtime_enable(dev);
}
return 0;
err_free:
sdhci_free_host(c->host);
return err;
}
static int sdhci_acpi_remove(struct platform_device *pdev)
{
struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
int dead;
if (c->use_runtime_pm) {
pm_runtime_get_sync(dev);
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
}
dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
sdhci_remove_host(c->host, dead);
sdhci_free_host(c->host);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int sdhci_acpi_suspend(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_suspend_host(c->host);
}
static int sdhci_acpi_resume(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_resume_host(c->host);
}
#else
#define sdhci_acpi_suspend NULL
#define sdhci_acpi_resume NULL
#endif
#ifdef CONFIG_PM_RUNTIME
static int sdhci_acpi_runtime_suspend(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_runtime_suspend_host(c->host);
}
static int sdhci_acpi_runtime_resume(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_runtime_resume_host(c->host);
}
static int sdhci_acpi_runtime_idle(struct device *dev)
{
return 0;
}
#endif
static const struct dev_pm_ops sdhci_acpi_pm_ops = {
.suspend = sdhci_acpi_suspend,
.resume = sdhci_acpi_resume,
SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
sdhci_acpi_runtime_resume, sdhci_acpi_runtime_idle)
};
static struct platform_driver sdhci_acpi_driver = {
.driver = {
.name = "sdhci-acpi",
.owner = THIS_MODULE,
.acpi_match_table = sdhci_acpi_ids,
.pm = &sdhci_acpi_pm_ops,
},
.probe = sdhci_acpi_probe,
.remove = sdhci_acpi_remove,
};
module_platform_driver(sdhci_acpi_driver);
MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL v2");
|