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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#include <linux/delay.h>
39
40#include <linux/mmc/host.h>
41#include <linux/mmc/pm.h>
42#include <linux/mmc/slot-gpio.h>
43
44#ifdef CONFIG_X86
45#include <asm/cpu_device_id.h>
46#include <asm/intel-family.h>
47#include <asm/iosf_mbi.h>
48#include <linux/pci.h>
49#endif
50
51#include "sdhci.h"
52
53enum {
54 SDHCI_ACPI_SD_CD = BIT(0),
55 SDHCI_ACPI_RUNTIME_PM = BIT(1),
56 SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
57};
58
59struct sdhci_acpi_chip {
60 const struct sdhci_ops *ops;
61 unsigned int quirks;
62 unsigned int quirks2;
63 unsigned long caps;
64 unsigned int caps2;
65 mmc_pm_flag_t pm_caps;
66};
67
68struct sdhci_acpi_slot {
69 const struct sdhci_acpi_chip *chip;
70 unsigned int quirks;
71 unsigned int quirks2;
72 unsigned long caps;
73 unsigned int caps2;
74 mmc_pm_flag_t pm_caps;
75 unsigned int flags;
76 int (*probe_slot)(struct platform_device *, const char *, const char *);
77 int (*remove_slot)(struct platform_device *);
78};
79
80struct sdhci_acpi_host {
81 struct sdhci_host *host;
82 const struct sdhci_acpi_slot *slot;
83 struct platform_device *pdev;
84 bool use_runtime_pm;
85};
86
87static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
88{
89 return c->slot && (c->slot->flags & flag);
90}
91
92static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
93{
94 u8 reg;
95
96 reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
97 reg |= 0x10;
98 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
99
100 udelay(9);
101 reg &= ~0x10;
102 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
103
104 usleep_range(300, 1000);
105}
106
107static const struct sdhci_ops sdhci_acpi_ops_dflt = {
108 .set_clock = sdhci_set_clock,
109 .set_bus_width = sdhci_set_bus_width,
110 .reset = sdhci_reset,
111 .set_uhs_signaling = sdhci_set_uhs_signaling,
112};
113
114static const struct sdhci_ops sdhci_acpi_ops_int = {
115 .set_clock = sdhci_set_clock,
116 .set_bus_width = sdhci_set_bus_width,
117 .reset = sdhci_reset,
118 .set_uhs_signaling = sdhci_set_uhs_signaling,
119 .hw_reset = sdhci_acpi_int_hw_reset,
120};
121
122static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
123 .ops = &sdhci_acpi_ops_int,
124};
125
126#ifdef CONFIG_X86
127
128static bool sdhci_acpi_byt(void)
129{
130 static const struct x86_cpu_id byt[] = {
131 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 },
132 {}
133 };
134
135 return x86_match_cpu(byt);
136}
137
138static bool sdhci_acpi_cht(void)
139{
140 static const struct x86_cpu_id cht[] = {
141 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
142 {}
143 };
144
145 return x86_match_cpu(cht);
146}
147
148#define BYT_IOSF_SCCEP 0x63
149#define BYT_IOSF_OCP_NETCTRL0 0x1078
150#define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
151
152static void sdhci_acpi_byt_setting(struct device *dev)
153{
154 u32 val = 0;
155
156 if (!sdhci_acpi_byt())
157 return;
158
159 if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
160 &val)) {
161 dev_err(dev, "%s read error\n", __func__);
162 return;
163 }
164
165 if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
166 return;
167
168 val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
169
170 if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
171 val)) {
172 dev_err(dev, "%s write error\n", __func__);
173 return;
174 }
175
176 dev_dbg(dev, "%s completed\n", __func__);
177}
178
179static bool sdhci_acpi_byt_defer(struct device *dev)
180{
181 if (!sdhci_acpi_byt())
182 return false;
183
184 if (!iosf_mbi_available())
185 return true;
186
187 sdhci_acpi_byt_setting(dev);
188
189 return false;
190}
191
192static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
193 unsigned int slot, unsigned int parent_slot)
194{
195 struct pci_dev *dev, *parent, *from = NULL;
196
197 while (1) {
198 dev = pci_get_device(vendor, device, from);
199 pci_dev_put(from);
200 if (!dev)
201 break;
202 parent = pci_upstream_bridge(dev);
203 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
204 parent && PCI_SLOT(parent->devfn) == parent_slot &&
205 !pci_upstream_bridge(parent)) {
206 pci_dev_put(dev);
207 return true;
208 }
209 from = dev;
210 }
211
212 return false;
213}
214
215
216
217
218
219
220
221
222static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
223 const char *uid)
224{
225 return sdhci_acpi_cht() &&
226 !strcmp(hid, "80860F14") &&
227 !strcmp(uid, "2") &&
228 sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
229}
230
231#else
232
233static inline void sdhci_acpi_byt_setting(struct device *dev)
234{
235}
236
237static inline bool sdhci_acpi_byt_defer(struct device *dev)
238{
239 return false;
240}
241
242static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
243 const char *uid)
244{
245 return false;
246}
247
248#endif
249
250static int bxt_get_cd(struct mmc_host *mmc)
251{
252 int gpio_cd = mmc_gpio_get_cd(mmc);
253 struct sdhci_host *host = mmc_priv(mmc);
254 unsigned long flags;
255 int ret = 0;
256
257 if (!gpio_cd)
258 return 0;
259
260 spin_lock_irqsave(&host->lock, flags);
261
262 if (host->flags & SDHCI_DEVICE_DEAD)
263 goto out;
264
265 ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
266out:
267 spin_unlock_irqrestore(&host->lock, flags);
268
269 return ret;
270}
271
272static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
273 const char *hid, const char *uid)
274{
275 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
276 struct sdhci_host *host;
277
278 if (!c || !c->host)
279 return 0;
280
281 host = c->host;
282
283
284
285 if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
286 sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
287 sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
288 host->timeout_clk = 1000;
289
290 return 0;
291}
292
293static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
294 const char *hid, const char *uid)
295{
296 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
297
298 if (!c || !c->host)
299 return 0;
300
301
302
303 return 0;
304}
305
306static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
307 const char *hid, const char *uid)
308{
309 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
310 struct sdhci_host *host;
311
312 if (!c || !c->host || !c->slot)
313 return 0;
314
315 host = c->host;
316
317
318
319 if (hid && !strcmp(hid, "80865ACA"))
320 host->mmc_host_ops.get_cd = bxt_get_cd;
321
322 return 0;
323}
324
325static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
326 .chip = &sdhci_acpi_chip_int,
327 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
328 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
329 MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
330 .flags = SDHCI_ACPI_RUNTIME_PM,
331 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
332 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
333 SDHCI_QUIRK2_STOP_WITH_TC |
334 SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
335 .probe_slot = sdhci_acpi_emmc_probe_slot,
336};
337
338static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
339 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
340 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
341 .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
342 .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
343 MMC_CAP_WAIT_WHILE_BUSY,
344 .flags = SDHCI_ACPI_RUNTIME_PM,
345 .pm_caps = MMC_PM_KEEP_POWER,
346 .probe_slot = sdhci_acpi_sdio_probe_slot,
347};
348
349static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
350 .flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
351 SDHCI_ACPI_RUNTIME_PM,
352 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
353 .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
354 SDHCI_QUIRK2_STOP_WITH_TC,
355 .caps = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
356 .probe_slot = sdhci_acpi_sd_probe_slot,
357};
358
359static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
360 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
361 .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
362 .caps = MMC_CAP_NONREMOVABLE,
363};
364
365static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
366 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
367 .caps = MMC_CAP_NONREMOVABLE,
368};
369
370struct sdhci_acpi_uid_slot {
371 const char *hid;
372 const char *uid;
373 const struct sdhci_acpi_slot *slot;
374};
375
376static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
377 { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
378 { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
379 { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
380 { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
381 { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
382 { "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
383 { "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
384 { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
385 { "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
386 { "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
387 { "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
388 { "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
389 { "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
390 { "PNP0D40" },
391 { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
392 { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
393 { },
394};
395
396static const struct acpi_device_id sdhci_acpi_ids[] = {
397 { "80865ACA" },
398 { "80865ACC" },
399 { "80865AD0" },
400 { "80860F14" },
401 { "80860F16" },
402 { "INT33BB" },
403 { "INT33C6" },
404 { "INT3436" },
405 { "INT344D" },
406 { "PNP0D40" },
407 { "QCOM8051" },
408 { "QCOM8052" },
409 { },
410};
411MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
412
413static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
414 const char *uid)
415{
416 const struct sdhci_acpi_uid_slot *u;
417
418 for (u = sdhci_acpi_uids; u->hid; u++) {
419 if (strcmp(u->hid, hid))
420 continue;
421 if (!u->uid)
422 return u->slot;
423 if (uid && !strcmp(u->uid, uid))
424 return u->slot;
425 }
426 return NULL;
427}
428
429static int sdhci_acpi_probe(struct platform_device *pdev)
430{
431 struct device *dev = &pdev->dev;
432 struct acpi_device *device, *child;
433 struct sdhci_acpi_host *c;
434 struct sdhci_host *host;
435 struct resource *iomem;
436 resource_size_t len;
437 const char *hid;
438 const char *uid;
439 int err;
440
441 device = ACPI_COMPANION(dev);
442 if (!device)
443 return -ENODEV;
444
445 hid = acpi_device_hid(device);
446 uid = device->pnp.unique_id;
447
448
449 acpi_device_fix_up_power(device);
450 if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
451 list_for_each_entry(child, &device->children, node)
452 if (child->status.present && child->status.enabled)
453 acpi_device_fix_up_power(child);
454 }
455
456 if (sdhci_acpi_byt_defer(dev))
457 return -EPROBE_DEFER;
458
459 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
460 if (!iomem)
461 return -ENOMEM;
462
463 len = resource_size(iomem);
464 if (len < 0x100)
465 dev_err(dev, "Invalid iomem size!\n");
466
467 if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
468 return -ENOMEM;
469
470 host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
471 if (IS_ERR(host))
472 return PTR_ERR(host);
473
474 c = sdhci_priv(host);
475 c->host = host;
476 c->slot = sdhci_acpi_get_slot(hid, uid);
477 c->pdev = pdev;
478 c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
479
480 platform_set_drvdata(pdev, c);
481
482 host->hw_name = "ACPI";
483 host->ops = &sdhci_acpi_ops_dflt;
484 host->irq = platform_get_irq(pdev, 0);
485
486 host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
487 resource_size(iomem));
488 if (host->ioaddr == NULL) {
489 err = -ENOMEM;
490 goto err_free;
491 }
492
493 if (c->slot) {
494 if (c->slot->probe_slot) {
495 err = c->slot->probe_slot(pdev, hid, uid);
496 if (err)
497 goto err_free;
498 }
499 if (c->slot->chip) {
500 host->ops = c->slot->chip->ops;
501 host->quirks |= c->slot->chip->quirks;
502 host->quirks2 |= c->slot->chip->quirks2;
503 host->mmc->caps |= c->slot->chip->caps;
504 host->mmc->caps2 |= c->slot->chip->caps2;
505 host->mmc->pm_caps |= c->slot->chip->pm_caps;
506 }
507 host->quirks |= c->slot->quirks;
508 host->quirks2 |= c->slot->quirks2;
509 host->mmc->caps |= c->slot->caps;
510 host->mmc->caps2 |= c->slot->caps2;
511 host->mmc->pm_caps |= c->slot->pm_caps;
512 }
513
514 host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
515
516 if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
517 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
518
519 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
520 if (err) {
521 if (err == -EPROBE_DEFER)
522 goto err_free;
523 dev_warn(dev, "failed to setup card detect gpio\n");
524 c->use_runtime_pm = false;
525 }
526 }
527
528 err = sdhci_add_host(host);
529 if (err)
530 goto err_free;
531
532 if (c->use_runtime_pm) {
533 pm_runtime_set_active(dev);
534 pm_suspend_ignore_children(dev, 1);
535 pm_runtime_set_autosuspend_delay(dev, 50);
536 pm_runtime_use_autosuspend(dev);
537 pm_runtime_enable(dev);
538 }
539
540 device_enable_async_suspend(dev);
541
542 return 0;
543
544err_free:
545 sdhci_free_host(c->host);
546 return err;
547}
548
549static int sdhci_acpi_remove(struct platform_device *pdev)
550{
551 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
552 struct device *dev = &pdev->dev;
553 int dead;
554
555 if (c->use_runtime_pm) {
556 pm_runtime_get_sync(dev);
557 pm_runtime_disable(dev);
558 pm_runtime_put_noidle(dev);
559 }
560
561 if (c->slot && c->slot->remove_slot)
562 c->slot->remove_slot(pdev);
563
564 dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
565 sdhci_remove_host(c->host, dead);
566 sdhci_free_host(c->host);
567
568 return 0;
569}
570
571#ifdef CONFIG_PM_SLEEP
572
573static int sdhci_acpi_suspend(struct device *dev)
574{
575 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
576 struct sdhci_host *host = c->host;
577
578 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
579 mmc_retune_needed(host->mmc);
580
581 return sdhci_suspend_host(host);
582}
583
584static int sdhci_acpi_resume(struct device *dev)
585{
586 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
587
588 sdhci_acpi_byt_setting(&c->pdev->dev);
589
590 return sdhci_resume_host(c->host);
591}
592
593#endif
594
595#ifdef CONFIG_PM
596
597static int sdhci_acpi_runtime_suspend(struct device *dev)
598{
599 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
600 struct sdhci_host *host = c->host;
601
602 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
603 mmc_retune_needed(host->mmc);
604
605 return sdhci_runtime_suspend_host(host);
606}
607
608static int sdhci_acpi_runtime_resume(struct device *dev)
609{
610 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
611
612 sdhci_acpi_byt_setting(&c->pdev->dev);
613
614 return sdhci_runtime_resume_host(c->host);
615}
616
617#endif
618
619static const struct dev_pm_ops sdhci_acpi_pm_ops = {
620 SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
621 SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
622 sdhci_acpi_runtime_resume, NULL)
623};
624
625static struct platform_driver sdhci_acpi_driver = {
626 .driver = {
627 .name = "sdhci-acpi",
628 .acpi_match_table = sdhci_acpi_ids,
629 .pm = &sdhci_acpi_pm_ops,
630 },
631 .probe = sdhci_acpi_probe,
632 .remove = sdhci_acpi_remove,
633};
634
635module_platform_driver(sdhci_acpi_driver);
636
637MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
638MODULE_AUTHOR("Adrian Hunter");
639MODULE_LICENSE("GPL v2");
640
