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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>
27#include <linux/io.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>
36#include <linux/pm.h>
37#include <linux/pm_runtime.h>
38
39#include <linux/mmc/host.h>
40#include <linux/mmc/pm.h>
41#include <linux/mmc/sdhci.h>
42
43#include "sdhci.h"
44
45enum {
46 SDHCI_ACPI_SD_CD = BIT(0),
47 SDHCI_ACPI_RUNTIME_PM = BIT(1),
48};
49
50struct sdhci_acpi_chip {
51 const struct sdhci_ops *ops;
52 unsigned int quirks;
53 unsigned int quirks2;
54 unsigned long caps;
55 unsigned int caps2;
56 mmc_pm_flag_t pm_caps;
57};
58
59struct sdhci_acpi_slot {
60 const struct sdhci_acpi_chip *chip;
61 unsigned int quirks;
62 unsigned int quirks2;
63 unsigned long caps;
64 unsigned int caps2;
65 mmc_pm_flag_t pm_caps;
66 unsigned int flags;
67};
68
69struct sdhci_acpi_host {
70 struct sdhci_host *host;
71 const struct sdhci_acpi_slot *slot;
72 struct platform_device *pdev;
73 bool use_runtime_pm;
74};
75
76static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
77{
78 return c->slot && (c->slot->flags & flag);
79}
80
81static int sdhci_acpi_enable_dma(struct sdhci_host *host)
82{
83 return 0;
84}
85
86static const struct sdhci_ops sdhci_acpi_ops_dflt = {
87 .enable_dma = sdhci_acpi_enable_dma,
88};
89
90static 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,
94};
95
96static 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,
101};
102
103static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
104};
105
106struct sdhci_acpi_uid_slot {
107 const char *hid;
108 const char *uid;
109 const struct sdhci_acpi_slot *slot;
110};
111
112static 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 },
117 { "PNP0D40" },
118 { },
119};
120
121static const struct acpi_device_id sdhci_acpi_ids[] = {
122 { "80860F14" },
123 { "INT33BB" },
124 { "INT33C6" },
125 { "PNP0D40" },
126 { },
127};
128MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
129
130static const struct sdhci_acpi_slot *sdhci_acpi_get_slot_by_ids(const char *hid,
131 const char *uid)
132{
133 const struct sdhci_acpi_uid_slot *u;
134
135 for (u = sdhci_acpi_uids; u->hid; u++) {
136 if (strcmp(u->hid, hid))
137 continue;
138 if (!u->uid)
139 return u->slot;
140 if (uid && !strcmp(u->uid, uid))
141 return u->slot;
142 }
143 return NULL;
144}
145
146static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(acpi_handle handle,
147 const char *hid)
148{
149 const struct sdhci_acpi_slot *slot;
150 struct acpi_device_info *info;
151 const char *uid = NULL;
152 acpi_status status;
153
154 status = acpi_get_object_info(handle, &info);
155 if (!ACPI_FAILURE(status) && (info->valid & ACPI_VALID_UID))
156 uid = info->unique_id.string;
157
158 slot = sdhci_acpi_get_slot_by_ids(hid, uid);
159
160 kfree(info);
161 return slot;
162}
163
164static int sdhci_acpi_probe(struct platform_device *pdev)
165{
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;
172 resource_size_t len;
173 const char *hid;
174 int err;
175
176 if (acpi_bus_get_device(handle, &device))
177 return -ENODEV;
178
179 if (acpi_bus_get_status(device) || !device->status.present)
180 return -ENODEV;
181
182 hid = acpi_device_hid(device);
183
184 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
185 if (!iomem)
186 return -ENOMEM;
187
188 len = resource_size(iomem);
189 if (len < 0x100)
190 dev_err(dev, "Invalid iomem size!\n");
191
192 if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
193 return -ENOMEM;
194
195 host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
196 if (IS_ERR(host))
197 return PTR_ERR(host);
198
199 c = sdhci_priv(host);
200 c->host = host;
201 c->slot = sdhci_acpi_get_slot(handle, hid);
202 c->pdev = pdev;
203 c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
204
205 platform_set_drvdata(pdev, c);
206
207 host->hw_name = "ACPI";
208 host->ops = &sdhci_acpi_ops_dflt;
209 host->irq = platform_get_irq(pdev, 0);
210
211 host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
212 resource_size(iomem));
213 if (host->ioaddr == NULL) {
214 err = -ENOMEM;
215 goto err_free;
216 }
217
218 if (!dev->dma_mask) {
219 u64 dma_mask;
220
221 if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) {
222
223 dma_mask = DMA_BIT_MASK(32);
224 } else {
225 dma_mask = DMA_BIT_MASK(32);
226 }
227
228 dev->dma_mask = &dev->coherent_dma_mask;
229 dev->coherent_dma_mask = dma_mask;
230 }
231
232 if (c->slot) {
233 if (c->slot->chip) {
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;
240 }
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;
246 }
247
248 host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
249
250 err = sdhci_add_host(host);
251 if (err)
252 goto err_free;
253
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);
260 }
261
262 return 0;
263
264err_free:
265 platform_set_drvdata(pdev, NULL);
266 sdhci_free_host(c->host);
267 return err;
268}
269
270static int sdhci_acpi_remove(struct platform_device *pdev)
271{
272 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
273 struct device *dev = &pdev->dev;
274 int dead;
275
276 if (c->use_runtime_pm) {
277 pm_runtime_get_sync(dev);
278 pm_runtime_disable(dev);
279 pm_runtime_put_noidle(dev);
280 }
281
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);
286
287 return 0;
288}
289
290#ifdef CONFIG_PM_SLEEP
291
292static int sdhci_acpi_suspend(struct device *dev)
293{
294 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
295
296 return sdhci_suspend_host(c->host);
297}
298
299static int sdhci_acpi_resume(struct device *dev)
300{
301 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
302
303 return sdhci_resume_host(c->host);
304}
305
306#else
307
308#define sdhci_acpi_suspend NULL
309#define sdhci_acpi_resume NULL
310
311#endif
312
313#ifdef CONFIG_PM_RUNTIME
314
315static int sdhci_acpi_runtime_suspend(struct device *dev)
316{
317 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
318
319 return sdhci_runtime_suspend_host(c->host);
320}
321
322static int sdhci_acpi_runtime_resume(struct device *dev)
323{
324 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
325
326 return sdhci_runtime_resume_host(c->host);
327}
328
329static int sdhci_acpi_runtime_idle(struct device *dev)
330{
331 return 0;
332}
333
334#else
335
336#define sdhci_acpi_runtime_suspend NULL
337#define sdhci_acpi_runtime_resume NULL
338#define sdhci_acpi_runtime_idle NULL
339
340#endif
341
342static 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,
348};
349
350static struct platform_driver sdhci_acpi_driver = {
351 .driver = {
352 .name = "sdhci-acpi",
353 .owner = THIS_MODULE,
354 .acpi_match_table = sdhci_acpi_ids,
355 .pm = &sdhci_acpi_pm_ops,
356 },
357 .probe = sdhci_acpi_probe,
358 .remove = sdhci_acpi_remove,
359};
360
361module_platform_driver(sdhci_acpi_driver);
362
363MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
364MODULE_AUTHOR("Adrian Hunter");
365MODULE_LICENSE("GPL v2");
366
