2 * Secure Digital Host Controller Interface ACPI driver.
4 * Copyright (c) 2012, Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 #include <linux/init.h>
22 #include <linux/export.h>
23 #include <linux/module.h>
24 #include <linux/device.h>
25 #include <linux/platform_device.h>
26 #include <linux/ioport.h>
28 #include <linux/dma-mapping.h>
29 #include <linux/compiler.h>
30 #include <linux/stddef.h>
31 #include <linux/bitops.h>
32 #include <linux/types.h>
33 #include <linux/err.h>
34 #include <linux/interrupt.h>
35 #include <linux/acpi.h>
37 #include <linux/pm_runtime.h>
39 #include <linux/mmc/host.h>
40 #include <linux/mmc/pm.h>
41 #include <linux/mmc/sdhci.h>
46 SDHCI_ACPI_SD_CD
= BIT(0),
47 SDHCI_ACPI_RUNTIME_PM
= BIT(1),
50 struct sdhci_acpi_chip
{
51 const struct sdhci_ops
*ops
;
56 mmc_pm_flag_t pm_caps
;
59 struct sdhci_acpi_slot
{
60 const struct sdhci_acpi_chip
*chip
;
65 mmc_pm_flag_t pm_caps
;
69 struct sdhci_acpi_host
{
70 struct sdhci_host
*host
;
71 const struct sdhci_acpi_slot
*slot
;
72 struct platform_device
*pdev
;
76 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host
*c
, unsigned int flag
)
78 return c
->slot
&& (c
->slot
->flags
& flag
);
81 static int sdhci_acpi_enable_dma(struct sdhci_host
*host
)
86 static const struct sdhci_ops sdhci_acpi_ops_dflt
= {
87 .enable_dma
= sdhci_acpi_enable_dma
,
90 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc
= {
91 .caps
= MMC_CAP_8_BIT_DATA
| MMC_CAP_NONREMOVABLE
,
92 .caps2
= MMC_CAP2_HC_ERASE_SZ
,
93 .flags
= SDHCI_ACPI_RUNTIME_PM
,
96 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio
= {
97 .quirks2
= SDHCI_QUIRK2_HOST_OFF_CARD_ON
,
98 .caps
= MMC_CAP_NONREMOVABLE
| MMC_CAP_POWER_OFF_CARD
,
99 .flags
= SDHCI_ACPI_RUNTIME_PM
,
100 .pm_caps
= MMC_PM_KEEP_POWER
,
103 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd
= {
106 struct sdhci_acpi_uid_slot
{
109 const struct sdhci_acpi_slot
*slot
;
112 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids
[] = {
113 { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc
},
114 { "80860F14" , "3" , &sdhci_acpi_slot_int_sd
},
115 { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio
},
116 { "INT33C6" , NULL
, &sdhci_acpi_slot_int_sdio
},
121 static const struct acpi_device_id sdhci_acpi_ids
[] = {
128 MODULE_DEVICE_TABLE(acpi
, sdhci_acpi_ids
);
130 static const struct sdhci_acpi_slot
*sdhci_acpi_get_slot_by_ids(const char *hid
,
133 const struct sdhci_acpi_uid_slot
*u
;
135 for (u
= sdhci_acpi_uids
; u
->hid
; u
++) {
136 if (strcmp(u
->hid
, hid
))
140 if (uid
&& !strcmp(u
->uid
, uid
))
146 static const struct sdhci_acpi_slot
*sdhci_acpi_get_slot(acpi_handle handle
,
149 const struct sdhci_acpi_slot
*slot
;
150 struct acpi_device_info
*info
;
151 const char *uid
= NULL
;
154 status
= acpi_get_object_info(handle
, &info
);
155 if (!ACPI_FAILURE(status
) && (info
->valid
& ACPI_VALID_UID
))
156 uid
= info
->unique_id
.string
;
158 slot
= sdhci_acpi_get_slot_by_ids(hid
, uid
);
164 static int sdhci_acpi_probe(struct platform_device
*pdev
)
166 struct device
*dev
= &pdev
->dev
;
167 acpi_handle handle
= ACPI_HANDLE(dev
);
168 struct acpi_device
*device
;
169 struct sdhci_acpi_host
*c
;
170 struct sdhci_host
*host
;
171 struct resource
*iomem
;
176 if (acpi_bus_get_device(handle
, &device
))
179 if (acpi_bus_get_status(device
) || !device
->status
.present
)
182 hid
= acpi_device_hid(device
);
184 iomem
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
188 len
= resource_size(iomem
);
190 dev_err(dev
, "Invalid iomem size!\n");
192 if (!devm_request_mem_region(dev
, iomem
->start
, len
, dev_name(dev
)))
195 host
= sdhci_alloc_host(dev
, sizeof(struct sdhci_acpi_host
));
197 return PTR_ERR(host
);
199 c
= sdhci_priv(host
);
201 c
->slot
= sdhci_acpi_get_slot(handle
, hid
);
203 c
->use_runtime_pm
= sdhci_acpi_flag(c
, SDHCI_ACPI_RUNTIME_PM
);
205 platform_set_drvdata(pdev
, c
);
207 host
->hw_name
= "ACPI";
208 host
->ops
= &sdhci_acpi_ops_dflt
;
209 host
->irq
= platform_get_irq(pdev
, 0);
211 host
->ioaddr
= devm_ioremap_nocache(dev
, iomem
->start
,
212 resource_size(iomem
));
213 if (host
->ioaddr
== NULL
) {
218 if (!dev
->dma_mask
) {
221 if (sdhci_readl(host
, SDHCI_CAPABILITIES
) & SDHCI_CAN_64BIT
) {
222 /* 64-bit DMA is not supported at present */
223 dma_mask
= DMA_BIT_MASK(32);
225 dma_mask
= DMA_BIT_MASK(32);
228 dev
->dma_mask
= &dev
->coherent_dma_mask
;
229 dev
->coherent_dma_mask
= dma_mask
;
234 host
->ops
= c
->slot
->chip
->ops
;
235 host
->quirks
|= c
->slot
->chip
->quirks
;
236 host
->quirks2
|= c
->slot
->chip
->quirks2
;
237 host
->mmc
->caps
|= c
->slot
->chip
->caps
;
238 host
->mmc
->caps2
|= c
->slot
->chip
->caps2
;
239 host
->mmc
->pm_caps
|= c
->slot
->chip
->pm_caps
;
241 host
->quirks
|= c
->slot
->quirks
;
242 host
->quirks2
|= c
->slot
->quirks2
;
243 host
->mmc
->caps
|= c
->slot
->caps
;
244 host
->mmc
->caps2
|= c
->slot
->caps2
;
245 host
->mmc
->pm_caps
|= c
->slot
->pm_caps
;
248 host
->mmc
->caps2
|= MMC_CAP2_NO_PRESCAN_POWERUP
;
250 err
= sdhci_add_host(host
);
254 if (c
->use_runtime_pm
) {
255 pm_runtime_set_active(dev
);
256 pm_suspend_ignore_children(dev
, 1);
257 pm_runtime_set_autosuspend_delay(dev
, 50);
258 pm_runtime_use_autosuspend(dev
);
259 pm_runtime_enable(dev
);
265 platform_set_drvdata(pdev
, NULL
);
266 sdhci_free_host(c
->host
);
270 static int sdhci_acpi_remove(struct platform_device
*pdev
)
272 struct sdhci_acpi_host
*c
= platform_get_drvdata(pdev
);
273 struct device
*dev
= &pdev
->dev
;
276 if (c
->use_runtime_pm
) {
277 pm_runtime_get_sync(dev
);
278 pm_runtime_disable(dev
);
279 pm_runtime_put_noidle(dev
);
282 dead
= (sdhci_readl(c
->host
, SDHCI_INT_STATUS
) == ~0);
283 sdhci_remove_host(c
->host
, dead
);
284 platform_set_drvdata(pdev
, NULL
);
285 sdhci_free_host(c
->host
);
290 #ifdef CONFIG_PM_SLEEP
292 static int sdhci_acpi_suspend(struct device
*dev
)
294 struct sdhci_acpi_host
*c
= dev_get_drvdata(dev
);
296 return sdhci_suspend_host(c
->host
);
299 static int sdhci_acpi_resume(struct device
*dev
)
301 struct sdhci_acpi_host
*c
= dev_get_drvdata(dev
);
303 return sdhci_resume_host(c
->host
);
308 #define sdhci_acpi_suspend NULL
309 #define sdhci_acpi_resume NULL
313 #ifdef CONFIG_PM_RUNTIME
315 static int sdhci_acpi_runtime_suspend(struct device
*dev
)
317 struct sdhci_acpi_host
*c
= dev_get_drvdata(dev
);
319 return sdhci_runtime_suspend_host(c
->host
);
322 static int sdhci_acpi_runtime_resume(struct device
*dev
)
324 struct sdhci_acpi_host
*c
= dev_get_drvdata(dev
);
326 return sdhci_runtime_resume_host(c
->host
);
329 static int sdhci_acpi_runtime_idle(struct device
*dev
)
336 #define sdhci_acpi_runtime_suspend NULL
337 #define sdhci_acpi_runtime_resume NULL
338 #define sdhci_acpi_runtime_idle NULL
342 static const struct dev_pm_ops sdhci_acpi_pm_ops
= {
343 .suspend
= sdhci_acpi_suspend
,
344 .resume
= sdhci_acpi_resume
,
345 .runtime_suspend
= sdhci_acpi_runtime_suspend
,
346 .runtime_resume
= sdhci_acpi_runtime_resume
,
347 .runtime_idle
= sdhci_acpi_runtime_idle
,
350 static struct platform_driver sdhci_acpi_driver
= {
352 .name
= "sdhci-acpi",
353 .owner
= THIS_MODULE
,
354 .acpi_match_table
= sdhci_acpi_ids
,
355 .pm
= &sdhci_acpi_pm_ops
,
357 .probe
= sdhci_acpi_probe
,
358 .remove
= sdhci_acpi_remove
,
361 module_platform_driver(sdhci_acpi_driver
);
363 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
364 MODULE_AUTHOR("Adrian Hunter");
365 MODULE_LICENSE("GPL v2");