1c4e05037SAdrian Hunter /* 2c4e05037SAdrian Hunter * Secure Digital Host Controller Interface ACPI driver. 3c4e05037SAdrian Hunter * 4c4e05037SAdrian Hunter * Copyright (c) 2012, Intel Corporation. 5c4e05037SAdrian Hunter * 6c4e05037SAdrian Hunter * This program is free software; you can redistribute it and/or modify it 7c4e05037SAdrian Hunter * under the terms and conditions of the GNU General Public License, 8c4e05037SAdrian Hunter * version 2, as published by the Free Software Foundation. 9c4e05037SAdrian Hunter * 10c4e05037SAdrian Hunter * This program is distributed in the hope it will be useful, but WITHOUT 11c4e05037SAdrian Hunter * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12c4e05037SAdrian Hunter * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13c4e05037SAdrian Hunter * more details. 14c4e05037SAdrian Hunter * 15c4e05037SAdrian Hunter * You should have received a copy of the GNU General Public License along with 16c4e05037SAdrian Hunter * this program; if not, write to the Free Software Foundation, Inc., 17c4e05037SAdrian Hunter * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18c4e05037SAdrian Hunter * 19c4e05037SAdrian Hunter */ 20c4e05037SAdrian Hunter 21c4e05037SAdrian Hunter #include <linux/init.h> 22c4e05037SAdrian Hunter #include <linux/export.h> 23c4e05037SAdrian Hunter #include <linux/module.h> 24c4e05037SAdrian Hunter #include <linux/device.h> 25c4e05037SAdrian Hunter #include <linux/platform_device.h> 26c4e05037SAdrian Hunter #include <linux/ioport.h> 27c4e05037SAdrian Hunter #include <linux/io.h> 28c4e05037SAdrian Hunter #include <linux/dma-mapping.h> 29c4e05037SAdrian Hunter #include <linux/compiler.h> 30c4e05037SAdrian Hunter #include <linux/stddef.h> 31c4e05037SAdrian Hunter #include <linux/bitops.h> 32c4e05037SAdrian Hunter #include <linux/types.h> 33c4e05037SAdrian Hunter #include <linux/err.h> 34c4e05037SAdrian Hunter #include <linux/interrupt.h> 35c4e05037SAdrian Hunter #include <linux/acpi.h> 36c4e05037SAdrian Hunter #include <linux/pm.h> 37c4e05037SAdrian Hunter #include <linux/pm_runtime.h> 38c4e05037SAdrian Hunter 39c4e05037SAdrian Hunter #include <linux/mmc/host.h> 40c4e05037SAdrian Hunter #include <linux/mmc/pm.h> 41c4e05037SAdrian Hunter #include <linux/mmc/sdhci.h> 42c4e05037SAdrian Hunter 43c4e05037SAdrian Hunter #include "sdhci.h" 44c4e05037SAdrian Hunter 45c4e05037SAdrian Hunter enum { 46c4e05037SAdrian Hunter SDHCI_ACPI_SD_CD = BIT(0), 47c4e05037SAdrian Hunter SDHCI_ACPI_RUNTIME_PM = BIT(1), 48c4e05037SAdrian Hunter }; 49c4e05037SAdrian Hunter 50c4e05037SAdrian Hunter struct sdhci_acpi_chip { 51c4e05037SAdrian Hunter const struct sdhci_ops *ops; 52c4e05037SAdrian Hunter unsigned int quirks; 53c4e05037SAdrian Hunter unsigned int quirks2; 54c4e05037SAdrian Hunter unsigned long caps; 55c4e05037SAdrian Hunter unsigned int caps2; 56c4e05037SAdrian Hunter mmc_pm_flag_t pm_caps; 57c4e05037SAdrian Hunter }; 58c4e05037SAdrian Hunter 59c4e05037SAdrian Hunter struct sdhci_acpi_slot { 60c4e05037SAdrian Hunter const struct sdhci_acpi_chip *chip; 61c4e05037SAdrian Hunter unsigned int quirks; 62c4e05037SAdrian Hunter unsigned int quirks2; 63c4e05037SAdrian Hunter unsigned long caps; 64c4e05037SAdrian Hunter unsigned int caps2; 65c4e05037SAdrian Hunter mmc_pm_flag_t pm_caps; 66c4e05037SAdrian Hunter unsigned int flags; 67c4e05037SAdrian Hunter }; 68c4e05037SAdrian Hunter 69c4e05037SAdrian Hunter struct sdhci_acpi_host { 70c4e05037SAdrian Hunter struct sdhci_host *host; 71c4e05037SAdrian Hunter const struct sdhci_acpi_slot *slot; 72c4e05037SAdrian Hunter struct platform_device *pdev; 73c4e05037SAdrian Hunter bool use_runtime_pm; 74c4e05037SAdrian Hunter }; 75c4e05037SAdrian Hunter 76c4e05037SAdrian Hunter static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) 77c4e05037SAdrian Hunter { 78c4e05037SAdrian Hunter return c->slot && (c->slot->flags & flag); 79c4e05037SAdrian Hunter } 80c4e05037SAdrian Hunter 81c4e05037SAdrian Hunter static int sdhci_acpi_enable_dma(struct sdhci_host *host) 82c4e05037SAdrian Hunter { 83c4e05037SAdrian Hunter return 0; 84c4e05037SAdrian Hunter } 85c4e05037SAdrian Hunter 86c4e05037SAdrian Hunter static const struct sdhci_ops sdhci_acpi_ops_dflt = { 87c4e05037SAdrian Hunter .enable_dma = sdhci_acpi_enable_dma, 88c4e05037SAdrian Hunter }; 89c4e05037SAdrian Hunter 90e5571397SAdrian Hunter static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = { 91e5571397SAdrian Hunter .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON, 92e5571397SAdrian Hunter .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD, 93e5571397SAdrian Hunter .flags = SDHCI_ACPI_RUNTIME_PM, 94e5571397SAdrian Hunter .pm_caps = MMC_PM_KEEP_POWER, 95e5571397SAdrian Hunter }; 96e5571397SAdrian Hunter 97c4e05037SAdrian Hunter static const struct acpi_device_id sdhci_acpi_ids[] = { 98e5571397SAdrian Hunter { "INT33C6", (kernel_ulong_t)&sdhci_acpi_slot_int_sdio }, 99c4e05037SAdrian Hunter { "PNP0D40" }, 100c4e05037SAdrian Hunter { }, 101c4e05037SAdrian Hunter }; 102c4e05037SAdrian Hunter MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids); 103c4e05037SAdrian Hunter 104c4e05037SAdrian Hunter static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid) 105c4e05037SAdrian Hunter { 106c4e05037SAdrian Hunter const struct acpi_device_id *id; 107c4e05037SAdrian Hunter 108c4e05037SAdrian Hunter for (id = sdhci_acpi_ids; id->id[0]; id++) 109c4e05037SAdrian Hunter if (!strcmp(id->id, hid)) 110c4e05037SAdrian Hunter return (const struct sdhci_acpi_slot *)id->driver_data; 111c4e05037SAdrian Hunter return NULL; 112c4e05037SAdrian Hunter } 113c4e05037SAdrian Hunter 114c4e05037SAdrian Hunter static int __devinit sdhci_acpi_probe(struct platform_device *pdev) 115c4e05037SAdrian Hunter { 116c4e05037SAdrian Hunter struct device *dev = &pdev->dev; 117c4e05037SAdrian Hunter acpi_handle handle = ACPI_HANDLE(dev); 118c4e05037SAdrian Hunter struct acpi_device *device; 119c4e05037SAdrian Hunter struct sdhci_acpi_host *c; 120c4e05037SAdrian Hunter struct sdhci_host *host; 121c4e05037SAdrian Hunter struct resource *iomem; 122c4e05037SAdrian Hunter resource_size_t len; 123c4e05037SAdrian Hunter const char *hid; 124c4e05037SAdrian Hunter int err; 125c4e05037SAdrian Hunter 126c4e05037SAdrian Hunter if (acpi_bus_get_device(handle, &device)) 127c4e05037SAdrian Hunter return -ENODEV; 128c4e05037SAdrian Hunter 129c4e05037SAdrian Hunter if (acpi_bus_get_status(device) || !device->status.present) 130c4e05037SAdrian Hunter return -ENODEV; 131c4e05037SAdrian Hunter 132c4e05037SAdrian Hunter hid = acpi_device_hid(device); 133c4e05037SAdrian Hunter 134c4e05037SAdrian Hunter iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 135c4e05037SAdrian Hunter if (!iomem) 136c4e05037SAdrian Hunter return -ENOMEM; 137c4e05037SAdrian Hunter 138c4e05037SAdrian Hunter len = resource_size(iomem); 139c4e05037SAdrian Hunter if (len < 0x100) 140c4e05037SAdrian Hunter dev_err(dev, "Invalid iomem size!\n"); 141c4e05037SAdrian Hunter 142c4e05037SAdrian Hunter if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev))) 143c4e05037SAdrian Hunter return -ENOMEM; 144c4e05037SAdrian Hunter 145c4e05037SAdrian Hunter host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host)); 146c4e05037SAdrian Hunter if (IS_ERR(host)) 147c4e05037SAdrian Hunter return PTR_ERR(host); 148c4e05037SAdrian Hunter 149c4e05037SAdrian Hunter c = sdhci_priv(host); 150c4e05037SAdrian Hunter c->host = host; 151c4e05037SAdrian Hunter c->slot = sdhci_acpi_get_slot(hid); 152c4e05037SAdrian Hunter c->pdev = pdev; 153c4e05037SAdrian Hunter c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM); 154c4e05037SAdrian Hunter 155c4e05037SAdrian Hunter platform_set_drvdata(pdev, c); 156c4e05037SAdrian Hunter 157c4e05037SAdrian Hunter host->hw_name = "ACPI"; 158c4e05037SAdrian Hunter host->ops = &sdhci_acpi_ops_dflt; 159c4e05037SAdrian Hunter host->irq = platform_get_irq(pdev, 0); 160c4e05037SAdrian Hunter 161c4e05037SAdrian Hunter host->ioaddr = devm_ioremap_nocache(dev, iomem->start, 162c4e05037SAdrian Hunter resource_size(iomem)); 163c4e05037SAdrian Hunter if (host->ioaddr == NULL) { 164c4e05037SAdrian Hunter err = -ENOMEM; 165c4e05037SAdrian Hunter goto err_free; 166c4e05037SAdrian Hunter } 167c4e05037SAdrian Hunter 168c4e05037SAdrian Hunter if (!dev->dma_mask) { 169c4e05037SAdrian Hunter u64 dma_mask; 170c4e05037SAdrian Hunter 171c4e05037SAdrian Hunter if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) { 172c4e05037SAdrian Hunter /* 64-bit DMA is not supported at present */ 173c4e05037SAdrian Hunter dma_mask = DMA_BIT_MASK(32); 174c4e05037SAdrian Hunter } else { 175c4e05037SAdrian Hunter dma_mask = DMA_BIT_MASK(32); 176c4e05037SAdrian Hunter } 177c4e05037SAdrian Hunter 178c4e05037SAdrian Hunter dev->dma_mask = &dev->coherent_dma_mask; 179c4e05037SAdrian Hunter dev->coherent_dma_mask = dma_mask; 180c4e05037SAdrian Hunter } 181c4e05037SAdrian Hunter 182c4e05037SAdrian Hunter if (c->slot) { 183c4e05037SAdrian Hunter if (c->slot->chip) { 184c4e05037SAdrian Hunter host->ops = c->slot->chip->ops; 185c4e05037SAdrian Hunter host->quirks |= c->slot->chip->quirks; 186c4e05037SAdrian Hunter host->quirks2 |= c->slot->chip->quirks2; 187c4e05037SAdrian Hunter host->mmc->caps |= c->slot->chip->caps; 188c4e05037SAdrian Hunter host->mmc->caps2 |= c->slot->chip->caps2; 189c4e05037SAdrian Hunter host->mmc->pm_caps |= c->slot->chip->pm_caps; 190c4e05037SAdrian Hunter } 191c4e05037SAdrian Hunter host->quirks |= c->slot->quirks; 192c4e05037SAdrian Hunter host->quirks2 |= c->slot->quirks2; 193c4e05037SAdrian Hunter host->mmc->caps |= c->slot->caps; 194c4e05037SAdrian Hunter host->mmc->caps2 |= c->slot->caps2; 195c4e05037SAdrian Hunter host->mmc->pm_caps |= c->slot->pm_caps; 196c4e05037SAdrian Hunter } 197c4e05037SAdrian Hunter 198c4e05037SAdrian Hunter err = sdhci_add_host(host); 199c4e05037SAdrian Hunter if (err) 200c4e05037SAdrian Hunter goto err_free; 201c4e05037SAdrian Hunter 202c4e05037SAdrian Hunter if (c->use_runtime_pm) { 203c4e05037SAdrian Hunter pm_suspend_ignore_children(dev, 1); 204c4e05037SAdrian Hunter pm_runtime_set_autosuspend_delay(dev, 50); 205c4e05037SAdrian Hunter pm_runtime_use_autosuspend(dev); 206c4e05037SAdrian Hunter pm_runtime_enable(dev); 207c4e05037SAdrian Hunter } 208c4e05037SAdrian Hunter 209c4e05037SAdrian Hunter return 0; 210c4e05037SAdrian Hunter 211c4e05037SAdrian Hunter err_free: 212c4e05037SAdrian Hunter platform_set_drvdata(pdev, NULL); 213c4e05037SAdrian Hunter sdhci_free_host(c->host); 214c4e05037SAdrian Hunter return err; 215c4e05037SAdrian Hunter } 216c4e05037SAdrian Hunter 217c4e05037SAdrian Hunter static int __devexit sdhci_acpi_remove(struct platform_device *pdev) 218c4e05037SAdrian Hunter { 219c4e05037SAdrian Hunter struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 220c4e05037SAdrian Hunter struct device *dev = &pdev->dev; 221c4e05037SAdrian Hunter int dead; 222c4e05037SAdrian Hunter 223c4e05037SAdrian Hunter if (c->use_runtime_pm) { 224c4e05037SAdrian Hunter pm_runtime_get_sync(dev); 225c4e05037SAdrian Hunter pm_runtime_disable(dev); 226c4e05037SAdrian Hunter pm_runtime_put_noidle(dev); 227c4e05037SAdrian Hunter } 228c4e05037SAdrian Hunter 229c4e05037SAdrian Hunter dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0); 230c4e05037SAdrian Hunter sdhci_remove_host(c->host, dead); 231c4e05037SAdrian Hunter platform_set_drvdata(pdev, NULL); 232c4e05037SAdrian Hunter sdhci_free_host(c->host); 233c4e05037SAdrian Hunter 234c4e05037SAdrian Hunter return 0; 235c4e05037SAdrian Hunter } 236c4e05037SAdrian Hunter 237c4e05037SAdrian Hunter #ifdef CONFIG_PM_SLEEP 238c4e05037SAdrian Hunter 239c4e05037SAdrian Hunter static int sdhci_acpi_suspend(struct device *dev) 240c4e05037SAdrian Hunter { 241c4e05037SAdrian Hunter struct sdhci_acpi_host *c = dev_get_drvdata(dev); 242c4e05037SAdrian Hunter 243c4e05037SAdrian Hunter return sdhci_suspend_host(c->host); 244c4e05037SAdrian Hunter } 245c4e05037SAdrian Hunter 246c4e05037SAdrian Hunter static int sdhci_acpi_resume(struct device *dev) 247c4e05037SAdrian Hunter { 248c4e05037SAdrian Hunter struct sdhci_acpi_host *c = dev_get_drvdata(dev); 249c4e05037SAdrian Hunter 250c4e05037SAdrian Hunter return sdhci_resume_host(c->host); 251c4e05037SAdrian Hunter } 252c4e05037SAdrian Hunter 253c4e05037SAdrian Hunter #else 254c4e05037SAdrian Hunter 255c4e05037SAdrian Hunter #define sdhci_acpi_suspend NULL 256c4e05037SAdrian Hunter #define sdhci_acpi_resume NULL 257c4e05037SAdrian Hunter 258c4e05037SAdrian Hunter #endif 259c4e05037SAdrian Hunter 260c4e05037SAdrian Hunter #ifdef CONFIG_PM_RUNTIME 261c4e05037SAdrian Hunter 262c4e05037SAdrian Hunter static int sdhci_acpi_runtime_suspend(struct device *dev) 263c4e05037SAdrian Hunter { 264c4e05037SAdrian Hunter struct sdhci_acpi_host *c = dev_get_drvdata(dev); 265c4e05037SAdrian Hunter 266c4e05037SAdrian Hunter return sdhci_runtime_suspend_host(c->host); 267c4e05037SAdrian Hunter } 268c4e05037SAdrian Hunter 269c4e05037SAdrian Hunter static int sdhci_acpi_runtime_resume(struct device *dev) 270c4e05037SAdrian Hunter { 271c4e05037SAdrian Hunter struct sdhci_acpi_host *c = dev_get_drvdata(dev); 272c4e05037SAdrian Hunter 273c4e05037SAdrian Hunter return sdhci_runtime_resume_host(c->host); 274c4e05037SAdrian Hunter } 275c4e05037SAdrian Hunter 276c4e05037SAdrian Hunter static int sdhci_acpi_runtime_idle(struct device *dev) 277c4e05037SAdrian Hunter { 278c4e05037SAdrian Hunter return 0; 279c4e05037SAdrian Hunter } 280c4e05037SAdrian Hunter 281c4e05037SAdrian Hunter #else 282c4e05037SAdrian Hunter 283c4e05037SAdrian Hunter #define sdhci_acpi_runtime_suspend NULL 284c4e05037SAdrian Hunter #define sdhci_acpi_runtime_resume NULL 285c4e05037SAdrian Hunter #define sdhci_acpi_runtime_idle NULL 286c4e05037SAdrian Hunter 287c4e05037SAdrian Hunter #endif 288c4e05037SAdrian Hunter 289c4e05037SAdrian Hunter static const struct dev_pm_ops sdhci_acpi_pm_ops = { 290c4e05037SAdrian Hunter .suspend = sdhci_acpi_suspend, 291c4e05037SAdrian Hunter .resume = sdhci_acpi_resume, 292c4e05037SAdrian Hunter .runtime_suspend = sdhci_acpi_runtime_suspend, 293c4e05037SAdrian Hunter .runtime_resume = sdhci_acpi_runtime_resume, 294c4e05037SAdrian Hunter .runtime_idle = sdhci_acpi_runtime_idle, 295c4e05037SAdrian Hunter }; 296c4e05037SAdrian Hunter 297c4e05037SAdrian Hunter static struct platform_driver sdhci_acpi_driver = { 298c4e05037SAdrian Hunter .driver = { 299c4e05037SAdrian Hunter .name = "sdhci-acpi", 300c4e05037SAdrian Hunter .owner = THIS_MODULE, 301c4e05037SAdrian Hunter .acpi_match_table = sdhci_acpi_ids, 302c4e05037SAdrian Hunter .pm = &sdhci_acpi_pm_ops, 303c4e05037SAdrian Hunter }, 304c4e05037SAdrian Hunter .probe = sdhci_acpi_probe, 305c4e05037SAdrian Hunter .remove = __devexit_p(sdhci_acpi_remove), 306c4e05037SAdrian Hunter }; 307c4e05037SAdrian Hunter 308c4e05037SAdrian Hunter module_platform_driver(sdhci_acpi_driver); 309c4e05037SAdrian Hunter 310c4e05037SAdrian Hunter MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver"); 311c4e05037SAdrian Hunter MODULE_AUTHOR("Adrian Hunter"); 312c4e05037SAdrian Hunter MODULE_LICENSE("GPL v2"); 313