9651dca6863ec299df9062879015a83aadc25a78
[muen/linux.git] / drivers / mmc / host / sdhci-acpi.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Secure Digital Host Controller Interface ACPI driver.
4  *
5  * Copyright (c) 2012, Intel Corporation.
6  */
7
8 #include <linux/init.h>
9 #include <linux/export.h>
10 #include <linux/module.h>
11 #include <linux/device.h>
12 #include <linux/platform_device.h>
13 #include <linux/ioport.h>
14 #include <linux/io.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/compiler.h>
17 #include <linux/stddef.h>
18 #include <linux/bitops.h>
19 #include <linux/types.h>
20 #include <linux/err.h>
21 #include <linux/interrupt.h>
22 #include <linux/acpi.h>
23 #include <linux/pm.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/delay.h>
26
27 #include <linux/mmc/host.h>
28 #include <linux/mmc/pm.h>
29 #include <linux/mmc/slot-gpio.h>
30
31 #ifdef CONFIG_X86
32 #include <asm/cpu_device_id.h>
33 #include <asm/intel-family.h>
34 #include <asm/iosf_mbi.h>
35 #include <linux/pci.h>
36 #endif
37
38 #include "sdhci.h"
39
40 enum {
41         SDHCI_ACPI_SD_CD                = BIT(0),
42         SDHCI_ACPI_RUNTIME_PM           = BIT(1),
43         SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
44 };
45
46 struct sdhci_acpi_chip {
47         const struct    sdhci_ops *ops;
48         unsigned int    quirks;
49         unsigned int    quirks2;
50         unsigned long   caps;
51         unsigned int    caps2;
52         mmc_pm_flag_t   pm_caps;
53 };
54
55 struct sdhci_acpi_slot {
56         const struct    sdhci_acpi_chip *chip;
57         unsigned int    quirks;
58         unsigned int    quirks2;
59         unsigned long   caps;
60         unsigned int    caps2;
61         mmc_pm_flag_t   pm_caps;
62         unsigned int    flags;
63         size_t          priv_size;
64         int (*probe_slot)(struct platform_device *, struct acpi_device *);
65         int (*remove_slot)(struct platform_device *);
66         int (*free_slot)(struct platform_device *pdev);
67         int (*setup_host)(struct platform_device *pdev);
68 };
69
70 struct sdhci_acpi_host {
71         struct sdhci_host               *host;
72         const struct sdhci_acpi_slot    *slot;
73         struct platform_device          *pdev;
74         bool                            use_runtime_pm;
75         unsigned long                   private[0] ____cacheline_aligned;
76 };
77
78 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
79 {
80         return (void *)c->private;
81 }
82
83 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
84 {
85         return c->slot && (c->slot->flags & flag);
86 }
87
88 #define INTEL_DSM_HS_CAPS_SDR25         BIT(0)
89 #define INTEL_DSM_HS_CAPS_DDR50         BIT(1)
90 #define INTEL_DSM_HS_CAPS_SDR50         BIT(2)
91 #define INTEL_DSM_HS_CAPS_SDR104        BIT(3)
92
93 enum {
94         INTEL_DSM_FNS           =  0,
95         INTEL_DSM_V18_SWITCH    =  3,
96         INTEL_DSM_V33_SWITCH    =  4,
97         INTEL_DSM_HS_CAPS       =  8,
98 };
99
100 struct intel_host {
101         u32     dsm_fns;
102         u32     hs_caps;
103 };
104
105 static const guid_t intel_dsm_guid =
106         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
107                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
108
109 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
110                        unsigned int fn, u32 *result)
111 {
112         union acpi_object *obj;
113         int err = 0;
114
115         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
116         if (!obj)
117                 return -EOPNOTSUPP;
118
119         if (obj->type == ACPI_TYPE_INTEGER) {
120                 *result = obj->integer.value;
121         } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
122                 size_t len = min_t(size_t, obj->buffer.length, 4);
123
124                 *result = 0;
125                 memcpy(result, obj->buffer.pointer, len);
126         } else {
127                 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
128                         __func__, fn, obj->type, obj->buffer.length);
129                 err = -EINVAL;
130         }
131
132         ACPI_FREE(obj);
133
134         return err;
135 }
136
137 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
138                      unsigned int fn, u32 *result)
139 {
140         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
141                 return -EOPNOTSUPP;
142
143         return __intel_dsm(intel_host, dev, fn, result);
144 }
145
146 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
147                            struct mmc_host *mmc)
148 {
149         int err;
150
151         intel_host->hs_caps = ~0;
152
153         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
154         if (err) {
155                 pr_debug("%s: DSM not supported, error %d\n",
156                          mmc_hostname(mmc), err);
157                 return;
158         }
159
160         pr_debug("%s: DSM function mask %#x\n",
161                  mmc_hostname(mmc), intel_host->dsm_fns);
162
163         intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
164 }
165
166 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
167                                              struct mmc_ios *ios)
168 {
169         struct device *dev = mmc_dev(mmc);
170         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
171         struct intel_host *intel_host = sdhci_acpi_priv(c);
172         unsigned int fn;
173         u32 result = 0;
174         int err;
175
176         err = sdhci_start_signal_voltage_switch(mmc, ios);
177         if (err)
178                 return err;
179
180         switch (ios->signal_voltage) {
181         case MMC_SIGNAL_VOLTAGE_330:
182                 fn = INTEL_DSM_V33_SWITCH;
183                 break;
184         case MMC_SIGNAL_VOLTAGE_180:
185                 fn = INTEL_DSM_V18_SWITCH;
186                 break;
187         default:
188                 return 0;
189         }
190
191         err = intel_dsm(intel_host, dev, fn, &result);
192         pr_debug("%s: %s DSM fn %u error %d result %u\n",
193                  mmc_hostname(mmc), __func__, fn, err, result);
194
195         return 0;
196 }
197
198 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
199 {
200         u8 reg;
201
202         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
203         reg |= 0x10;
204         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
205         /* For eMMC, minimum is 1us but give it 9us for good measure */
206         udelay(9);
207         reg &= ~0x10;
208         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
209         /* For eMMC, minimum is 200us but give it 300us for good measure */
210         usleep_range(300, 1000);
211 }
212
213 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
214         .set_clock = sdhci_set_clock,
215         .set_bus_width = sdhci_set_bus_width,
216         .reset = sdhci_reset,
217         .set_uhs_signaling = sdhci_set_uhs_signaling,
218 };
219
220 static const struct sdhci_ops sdhci_acpi_ops_int = {
221         .set_clock = sdhci_set_clock,
222         .set_bus_width = sdhci_set_bus_width,
223         .reset = sdhci_reset,
224         .set_uhs_signaling = sdhci_set_uhs_signaling,
225         .hw_reset   = sdhci_acpi_int_hw_reset,
226 };
227
228 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
229         .ops = &sdhci_acpi_ops_int,
230 };
231
232 #ifdef CONFIG_X86
233
234 static bool sdhci_acpi_byt(void)
235 {
236         static const struct x86_cpu_id byt[] = {
237                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT },
238                 {}
239         };
240
241         return x86_match_cpu(byt);
242 }
243
244 static bool sdhci_acpi_cht(void)
245 {
246         static const struct x86_cpu_id cht[] = {
247                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
248                 {}
249         };
250
251         return x86_match_cpu(cht);
252 }
253
254 #define BYT_IOSF_SCCEP                  0x63
255 #define BYT_IOSF_OCP_NETCTRL0           0x1078
256 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
257
258 static void sdhci_acpi_byt_setting(struct device *dev)
259 {
260         u32 val = 0;
261
262         if (!sdhci_acpi_byt())
263                 return;
264
265         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
266                           &val)) {
267                 dev_err(dev, "%s read error\n", __func__);
268                 return;
269         }
270
271         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
272                 return;
273
274         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
275
276         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
277                            val)) {
278                 dev_err(dev, "%s write error\n", __func__);
279                 return;
280         }
281
282         dev_dbg(dev, "%s completed\n", __func__);
283 }
284
285 static bool sdhci_acpi_byt_defer(struct device *dev)
286 {
287         if (!sdhci_acpi_byt())
288                 return false;
289
290         if (!iosf_mbi_available())
291                 return true;
292
293         sdhci_acpi_byt_setting(dev);
294
295         return false;
296 }
297
298 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
299                                     unsigned int slot, unsigned int parent_slot)
300 {
301         struct pci_dev *dev, *parent, *from = NULL;
302
303         while (1) {
304                 dev = pci_get_device(vendor, device, from);
305                 pci_dev_put(from);
306                 if (!dev)
307                         break;
308                 parent = pci_upstream_bridge(dev);
309                 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
310                     parent && PCI_SLOT(parent->devfn) == parent_slot &&
311                     !pci_upstream_bridge(parent)) {
312                         pci_dev_put(dev);
313                         return true;
314                 }
315                 from = dev;
316         }
317
318         return false;
319 }
320
321 /*
322  * GPDwin uses PCI wifi which conflicts with SDIO's use of
323  * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
324  * problematic, but since SDIO is only used for wifi, the presence of the PCI
325  * wifi card in the expected slot with an ACPI companion node, is used to
326  * indicate that acpi_device_fix_up_power() should be avoided.
327  */
328 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
329 {
330         return sdhci_acpi_cht() &&
331                acpi_dev_hid_uid_match(adev, "80860F14", "2") &&
332                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
333 }
334
335 #else
336
337 static inline void sdhci_acpi_byt_setting(struct device *dev)
338 {
339 }
340
341 static inline bool sdhci_acpi_byt_defer(struct device *dev)
342 {
343         return false;
344 }
345
346 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
347 {
348         return false;
349 }
350
351 #endif
352
353 static int bxt_get_cd(struct mmc_host *mmc)
354 {
355         int gpio_cd = mmc_gpio_get_cd(mmc);
356         struct sdhci_host *host = mmc_priv(mmc);
357         unsigned long flags;
358         int ret = 0;
359
360         if (!gpio_cd)
361                 return 0;
362
363         spin_lock_irqsave(&host->lock, flags);
364
365         if (host->flags & SDHCI_DEVICE_DEAD)
366                 goto out;
367
368         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
369 out:
370         spin_unlock_irqrestore(&host->lock, flags);
371
372         return ret;
373 }
374
375 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
376 {
377         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
378         struct intel_host *intel_host = sdhci_acpi_priv(c);
379         struct sdhci_host *host = c->host;
380
381         if (acpi_dev_hid_uid_match(adev, "80860F14", "1") &&
382             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
383             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
384                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
385
386         if (acpi_dev_hid_uid_match(adev, "80865ACA", NULL))
387                 host->mmc_host_ops.get_cd = bxt_get_cd;
388
389         intel_dsm_init(intel_host, &pdev->dev, host->mmc);
390
391         host->mmc_host_ops.start_signal_voltage_switch =
392                                         intel_start_signal_voltage_switch;
393
394         return 0;
395 }
396
397 static int intel_setup_host(struct platform_device *pdev)
398 {
399         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
400         struct intel_host *intel_host = sdhci_acpi_priv(c);
401
402         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
403                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
404
405         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
406                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
407
408         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
409                 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
410
411         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
412                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
413
414         return 0;
415 }
416
417 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
418         .chip    = &sdhci_acpi_chip_int,
419         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
420                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
421                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
422         .flags   = SDHCI_ACPI_RUNTIME_PM,
423         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
424                    SDHCI_QUIRK_NO_LED,
425         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
426                    SDHCI_QUIRK2_STOP_WITH_TC |
427                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
428         .probe_slot     = intel_probe_slot,
429         .setup_host     = intel_setup_host,
430         .priv_size      = sizeof(struct intel_host),
431 };
432
433 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
434         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
435                    SDHCI_QUIRK_NO_LED |
436                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
437         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
438         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
439                    MMC_CAP_WAIT_WHILE_BUSY,
440         .flags   = SDHCI_ACPI_RUNTIME_PM,
441         .pm_caps = MMC_PM_KEEP_POWER,
442         .probe_slot     = intel_probe_slot,
443         .setup_host     = intel_setup_host,
444         .priv_size      = sizeof(struct intel_host),
445 };
446
447 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
448         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
449                    SDHCI_ACPI_RUNTIME_PM,
450         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
451                    SDHCI_QUIRK_NO_LED,
452         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
453                    SDHCI_QUIRK2_STOP_WITH_TC,
454         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
455         .probe_slot     = intel_probe_slot,
456         .setup_host     = intel_setup_host,
457         .priv_size      = sizeof(struct intel_host),
458 };
459
460 #define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG        0x1a8
461 #define VENDOR_SPECIFIC_PWRCTL_CTL_REG          0x1ac
462 static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr)
463 {
464         struct sdhci_host *host = ptr;
465
466         sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG);
467         sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG);
468
469         return IRQ_HANDLED;
470 }
471
472 static int qcom_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
473 {
474         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
475         struct sdhci_host *host = c->host;
476         int *irq = sdhci_acpi_priv(c);
477
478         *irq = -EINVAL;
479
480         if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
481                 return 0;
482
483         *irq = platform_get_irq(pdev, 1);
484         if (*irq < 0)
485                 return 0;
486
487         return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler,
488                                     IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
489                                     "sdhci_qcom", host);
490 }
491
492 static int qcom_free_slot(struct platform_device *pdev)
493 {
494         struct device *dev = &pdev->dev;
495         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
496         struct sdhci_host *host = c->host;
497         struct acpi_device *adev;
498         int *irq = sdhci_acpi_priv(c);
499
500         adev = ACPI_COMPANION(dev);
501         if (!adev)
502                 return -ENODEV;
503
504         if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
505                 return 0;
506
507         if (*irq < 0)
508                 return 0;
509
510         free_irq(*irq, host);
511         return 0;
512 }
513
514 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
515         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
516         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
517         .caps    = MMC_CAP_NONREMOVABLE,
518         .priv_size      = sizeof(int),
519         .probe_slot     = qcom_probe_slot,
520         .free_slot      = qcom_free_slot,
521 };
522
523 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
524         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
525         .caps    = MMC_CAP_NONREMOVABLE,
526 };
527
528 /* AMD sdhci reset dll register. */
529 #define SDHCI_AMD_RESET_DLL_REGISTER    0x908
530
531 static int amd_select_drive_strength(struct mmc_card *card,
532                                      unsigned int max_dtr, int host_drv,
533                                      int card_drv, int *drv_type)
534 {
535         return MMC_SET_DRIVER_TYPE_A;
536 }
537
538 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
539 {
540         /* AMD Platform requires dll setting */
541         sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
542         usleep_range(10, 20);
543         sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
544 }
545
546 /*
547  * For AMD Platform it is required to disable the tuning
548  * bit first controller to bring to HS Mode from HS200
549  * mode, later enable to tune to HS400 mode.
550  */
551 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
552 {
553         struct sdhci_host *host = mmc_priv(mmc);
554         unsigned int old_timing = host->timing;
555
556         sdhci_set_ios(mmc, ios);
557         if (old_timing == MMC_TIMING_MMC_HS200 &&
558             ios->timing == MMC_TIMING_MMC_HS)
559                 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
560         if (old_timing != MMC_TIMING_MMC_HS400 &&
561             ios->timing == MMC_TIMING_MMC_HS400) {
562                 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
563                 sdhci_acpi_amd_hs400_dll(host);
564         }
565 }
566
567 static const struct sdhci_ops sdhci_acpi_ops_amd = {
568         .set_clock      = sdhci_set_clock,
569         .set_bus_width  = sdhci_set_bus_width,
570         .reset          = sdhci_reset,
571         .set_uhs_signaling = sdhci_set_uhs_signaling,
572 };
573
574 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
575         .ops = &sdhci_acpi_ops_amd,
576 };
577
578 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
579                                           struct acpi_device *adev)
580 {
581         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
582         struct sdhci_host *host   = c->host;
583
584         sdhci_read_caps(host);
585         if (host->caps1 & SDHCI_SUPPORT_DDR50)
586                 host->mmc->caps = MMC_CAP_1_8V_DDR;
587
588         if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
589             (host->mmc->caps & MMC_CAP_1_8V_DDR))
590                 host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
591
592         host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
593         host->mmc_host_ops.set_ios = amd_set_ios;
594         return 0;
595 }
596
597 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
598         .chip   = &sdhci_acpi_chip_amd,
599         .caps   = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
600         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE |
601                         SDHCI_QUIRK_32BIT_ADMA_SIZE,
602         .probe_slot     = sdhci_acpi_emmc_amd_probe_slot,
603 };
604
605 struct sdhci_acpi_uid_slot {
606         const char *hid;
607         const char *uid;
608         const struct sdhci_acpi_slot *slot;
609 };
610
611 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
612         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
613         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
614         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
615         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
616         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
617         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
618         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
619         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
620         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
621         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
622         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
623         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
624         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
625         { "PNP0D40"  },
626         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
627         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
628         { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
629         { },
630 };
631
632 static const struct acpi_device_id sdhci_acpi_ids[] = {
633         { "80865ACA" },
634         { "80865ACC" },
635         { "80865AD0" },
636         { "80860F14" },
637         { "80860F16" },
638         { "INT33BB"  },
639         { "INT33C6"  },
640         { "INT3436"  },
641         { "INT344D"  },
642         { "PNP0D40"  },
643         { "QCOM8051" },
644         { "QCOM8052" },
645         { "AMDI0040" },
646         { },
647 };
648 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
649
650 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(struct acpi_device *adev)
651 {
652         const struct sdhci_acpi_uid_slot *u;
653
654         for (u = sdhci_acpi_uids; u->hid; u++) {
655                 if (acpi_dev_hid_uid_match(adev, u->hid, u->uid))
656                         return u->slot;
657         }
658         return NULL;
659 }
660
661 static int sdhci_acpi_probe(struct platform_device *pdev)
662 {
663         struct device *dev = &pdev->dev;
664         const struct sdhci_acpi_slot *slot;
665         struct acpi_device *device, *child;
666         struct sdhci_acpi_host *c;
667         struct sdhci_host *host;
668         struct resource *iomem;
669         resource_size_t len;
670         size_t priv_size;
671         int err;
672
673         device = ACPI_COMPANION(dev);
674         if (!device)
675                 return -ENODEV;
676
677         slot = sdhci_acpi_get_slot(device);
678
679         /* Power on the SDHCI controller and its children */
680         acpi_device_fix_up_power(device);
681         if (!sdhci_acpi_no_fixup_child_power(device)) {
682                 list_for_each_entry(child, &device->children, node)
683                         if (child->status.present && child->status.enabled)
684                                 acpi_device_fix_up_power(child);
685         }
686
687         if (sdhci_acpi_byt_defer(dev))
688                 return -EPROBE_DEFER;
689
690         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
691         if (!iomem)
692                 return -ENOMEM;
693
694         len = resource_size(iomem);
695         if (len < 0x100)
696                 dev_err(dev, "Invalid iomem size!\n");
697
698         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
699                 return -ENOMEM;
700
701         priv_size = slot ? slot->priv_size : 0;
702         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
703         if (IS_ERR(host))
704                 return PTR_ERR(host);
705
706         c = sdhci_priv(host);
707         c->host = host;
708         c->slot = slot;
709         c->pdev = pdev;
710         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
711
712         platform_set_drvdata(pdev, c);
713
714         host->hw_name   = "ACPI";
715         host->ops       = &sdhci_acpi_ops_dflt;
716         host->irq       = platform_get_irq(pdev, 0);
717         if (host->irq < 0) {
718                 err = -EINVAL;
719                 goto err_free;
720         }
721
722         host->ioaddr = devm_ioremap(dev, iomem->start,
723                                             resource_size(iomem));
724         if (host->ioaddr == NULL) {
725                 err = -ENOMEM;
726                 goto err_free;
727         }
728
729         if (c->slot) {
730                 if (c->slot->probe_slot) {
731                         err = c->slot->probe_slot(pdev, device);
732                         if (err)
733                                 goto err_free;
734                 }
735                 if (c->slot->chip) {
736                         host->ops            = c->slot->chip->ops;
737                         host->quirks        |= c->slot->chip->quirks;
738                         host->quirks2       |= c->slot->chip->quirks2;
739                         host->mmc->caps     |= c->slot->chip->caps;
740                         host->mmc->caps2    |= c->slot->chip->caps2;
741                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
742                 }
743                 host->quirks        |= c->slot->quirks;
744                 host->quirks2       |= c->slot->quirks2;
745                 host->mmc->caps     |= c->slot->caps;
746                 host->mmc->caps2    |= c->slot->caps2;
747                 host->mmc->pm_caps  |= c->slot->pm_caps;
748         }
749
750         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
751
752         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
753                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
754
755                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0);
756                 if (err) {
757                         if (err == -EPROBE_DEFER)
758                                 goto err_free;
759                         dev_warn(dev, "failed to setup card detect gpio\n");
760                         c->use_runtime_pm = false;
761                 }
762         }
763
764         err = sdhci_setup_host(host);
765         if (err)
766                 goto err_free;
767
768         if (c->slot && c->slot->setup_host) {
769                 err = c->slot->setup_host(pdev);
770                 if (err)
771                         goto err_cleanup;
772         }
773
774         err = __sdhci_add_host(host);
775         if (err)
776                 goto err_cleanup;
777
778         if (c->use_runtime_pm) {
779                 pm_runtime_set_active(dev);
780                 pm_suspend_ignore_children(dev, 1);
781                 pm_runtime_set_autosuspend_delay(dev, 50);
782                 pm_runtime_use_autosuspend(dev);
783                 pm_runtime_enable(dev);
784         }
785
786         device_enable_async_suspend(dev);
787
788         return 0;
789
790 err_cleanup:
791         sdhci_cleanup_host(c->host);
792 err_free:
793         if (c->slot && c->slot->free_slot)
794                 c->slot->free_slot(pdev);
795
796         sdhci_free_host(c->host);
797         return err;
798 }
799
800 static int sdhci_acpi_remove(struct platform_device *pdev)
801 {
802         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
803         struct device *dev = &pdev->dev;
804         int dead;
805
806         if (c->use_runtime_pm) {
807                 pm_runtime_get_sync(dev);
808                 pm_runtime_disable(dev);
809                 pm_runtime_put_noidle(dev);
810         }
811
812         if (c->slot && c->slot->remove_slot)
813                 c->slot->remove_slot(pdev);
814
815         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
816         sdhci_remove_host(c->host, dead);
817
818         if (c->slot && c->slot->free_slot)
819                 c->slot->free_slot(pdev);
820
821         sdhci_free_host(c->host);
822
823         return 0;
824 }
825
826 #ifdef CONFIG_PM_SLEEP
827
828 static int sdhci_acpi_suspend(struct device *dev)
829 {
830         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
831         struct sdhci_host *host = c->host;
832
833         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
834                 mmc_retune_needed(host->mmc);
835
836         return sdhci_suspend_host(host);
837 }
838
839 static int sdhci_acpi_resume(struct device *dev)
840 {
841         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
842
843         sdhci_acpi_byt_setting(&c->pdev->dev);
844
845         return sdhci_resume_host(c->host);
846 }
847
848 #endif
849
850 #ifdef CONFIG_PM
851
852 static int sdhci_acpi_runtime_suspend(struct device *dev)
853 {
854         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
855         struct sdhci_host *host = c->host;
856
857         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
858                 mmc_retune_needed(host->mmc);
859
860         return sdhci_runtime_suspend_host(host);
861 }
862
863 static int sdhci_acpi_runtime_resume(struct device *dev)
864 {
865         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
866
867         sdhci_acpi_byt_setting(&c->pdev->dev);
868
869         return sdhci_runtime_resume_host(c->host, 0);
870 }
871
872 #endif
873
874 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
875         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
876         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
877                         sdhci_acpi_runtime_resume, NULL)
878 };
879
880 static struct platform_driver sdhci_acpi_driver = {
881         .driver = {
882                 .name                   = "sdhci-acpi",
883                 .acpi_match_table       = sdhci_acpi_ids,
884                 .pm                     = &sdhci_acpi_pm_ops,
885         },
886         .probe  = sdhci_acpi_probe,
887         .remove = sdhci_acpi_remove,
888 };
889
890 module_platform_driver(sdhci_acpi_driver);
891
892 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
893 MODULE_AUTHOR("Adrian Hunter");
894 MODULE_LICENSE("GPL v2");