1 files changed, 106 insertions, 113 deletions

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index dbab0407f4b6..6414efeddca0 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -2,6 +2,12 @@
  * sdhci-pltfm.c Support for SDHCI platform devices
  * Copyright (c) 2009 Intel Corporation
  *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Copyright (c) 2009 MontaVista Software, Inc.
+ *
+ * Authors: Xiaobo Xie <X.Xie@freescale.com>
+ *	    Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
@@ -22,48 +28,67 @@
  * Inspired by sdhci-pci.c, by Pierre Ossman
  */
 
-#include <linux/delay.h>
-#include <linux/highmem.h>
-#include <linux/mod_devicetable.h>
-#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#ifdef CONFIG_PPC
+#include <asm/machdep.h>
+#endif
+#include "sdhci-pltfm.h"
 
-#include <linux/mmc/host.h>
+static struct sdhci_ops sdhci_pltfm_ops = {
+};
 
-#include <linux/io.h>
-#include <linux/mmc/sdhci-pltfm.h>
+#ifdef CONFIG_OF
+static bool sdhci_of_wp_inverted(struct device_node *np)
+{
+	if (of_get_property(np, "sdhci,wp-inverted", NULL))
+		return true;
 
-#include "sdhci.h"
-#include "sdhci-pltfm.h"
+	/* Old device trees don't have the wp-inverted property. */
+#ifdef CONFIG_PPC
+	return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
+#else
+	return false;
+#endif /* CONFIG_PPC */
+}
+
+void sdhci_get_of_property(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	const __be32 *clk;
+	int size;
 
-/*****************************************************************************\
- *                                                                           *
- * SDHCI core callbacks                                                      *
- *                                                                           *
-\*****************************************************************************/
+	if (of_device_is_available(np)) {
+		if (of_get_property(np, "sdhci,auto-cmd12", NULL))
+			host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
 
-static struct sdhci_ops sdhci_pltfm_ops = {
-};
+		if (of_get_property(np, "sdhci,1-bit-only", NULL))
+			host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
 
-/*****************************************************************************\
- *                                                                           *
- * Device probing/removal                                                    *
- *                                                                           *
-\*****************************************************************************/
+		if (sdhci_of_wp_inverted(np))
+			host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
 
-static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
+		clk = of_get_property(np, "clock-frequency", &size);
+		if (clk && size == sizeof(*clk) && *clk)
+			pltfm_host->clock = be32_to_cpup(clk);
+	}
+}
+#else
+void sdhci_get_of_property(struct platform_device *pdev) {}
+#endif /* CONFIG_OF */
+EXPORT_SYMBOL_GPL(sdhci_get_of_property);
+
+struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
+				    struct sdhci_pltfm_data *pdata)
 {
-	const struct platform_device_id *platid = platform_get_device_id(pdev);
-	struct sdhci_pltfm_data *pdata;
 	struct sdhci_host *host;
 	struct sdhci_pltfm_host *pltfm_host;
+	struct device_node *np = pdev->dev.of_node;
 	struct resource *iomem;
 	int ret;
 
-	if (platid && platid->driver_data)
-		pdata = (void *)platid->driver_data;
-	else
-		pdata = pdev->dev.platform_data;
-
 	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!iomem) {
 		ret = -ENOMEM;
@@ -71,11 +96,10 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
 	}
 
 	if (resource_size(iomem) < 0x100)
-		dev_err(&pdev->dev, "Invalid iomem size. You may "
-			"experience problems.\n");
+		dev_err(&pdev->dev, "Invalid iomem size!\n");
 
 	/* Some PCI-based MFD need the parent here */
-	if (pdev->dev.parent != &platform_bus)
+	if (pdev->dev.parent != &platform_bus && !np)
 		host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
 	else
 		host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
@@ -87,7 +111,7 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
 
 	pltfm_host = sdhci_priv(host);
 
-	host->hw_name = "platform";
+	host->hw_name = dev_name(&pdev->dev);
 	if (pdata && pdata->ops)
 		host->ops = pdata->ops;
 	else
@@ -110,126 +134,95 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
 		goto err_remap;
 	}
 
-	if (pdata && pdata->init) {
-		ret = pdata->init(host, pdata);
-		if (ret)
-			goto err_plat_init;
-	}
-
-	ret = sdhci_add_host(host);
-	if (ret)
-		goto err_add_host;
-
 	platform_set_drvdata(pdev, host);
 
-	return 0;
+	return host;
 
-err_add_host:
-	if (pdata && pdata->exit)
-		pdata->exit(host);
-err_plat_init:
-	iounmap(host->ioaddr);
 err_remap:
 	release_mem_region(iomem->start, resource_size(iomem));
 err_request:
 	sdhci_free_host(host);
 err:
-	printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
-	return ret;
+	dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
+	return ERR_PTR(ret);
 }
+EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
 
-static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
+void sdhci_pltfm_free(struct platform_device *pdev)
 {
-	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	int dead;
-	u32 scratch;
-
-	dead = 0;
-	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
-	if (scratch == (u32)-1)
-		dead = 1;
 
-	sdhci_remove_host(host, dead);
-	if (pdata && pdata->exit)
-		pdata->exit(host);
 	iounmap(host->ioaddr);
 	release_mem_region(iomem->start, resource_size(iomem));
 	sdhci_free_host(host);
 	platform_set_drvdata(pdev, NULL);
+}
+EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
 
-	return 0;
+int sdhci_pltfm_register(struct platform_device *pdev,
+			 struct sdhci_pltfm_data *pdata)
+{
+	struct sdhci_host *host;
+	int ret = 0;
+
+	host = sdhci_pltfm_init(pdev, pdata);
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	sdhci_get_of_property(pdev);
+
+	ret = sdhci_add_host(host);
+	if (ret)
+		sdhci_pltfm_free(pdev);
+
+	return ret;
 }
+EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
 
-static const struct platform_device_id sdhci_pltfm_ids[] = {
-	{ "sdhci", },
-#ifdef CONFIG_MMC_SDHCI_CNS3XXX
-	{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
-#endif
-#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
-	{ "sdhci-esdhc-imx", (kernel_ulong_t)&sdhci_esdhc_imx_pdata },
-#endif
-#ifdef CONFIG_MMC_SDHCI_DOVE
-	{ "sdhci-dove", (kernel_ulong_t)&sdhci_dove_pdata },
-#endif
-#ifdef CONFIG_MMC_SDHCI_TEGRA
-	{ "sdhci-tegra", (kernel_ulong_t)&sdhci_tegra_pdata },
-#endif
-	{ },
-};
-MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);
+int sdhci_pltfm_unregister(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
+
+	sdhci_remove_host(host, dead);
+	sdhci_pltfm_free(pdev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
 
 #ifdef CONFIG_PM
-static int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
+int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
 {
 	struct sdhci_host *host = platform_get_drvdata(dev);
 
 	return sdhci_suspend_host(host, state);
 }
+EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
 
-static int sdhci_pltfm_resume(struct platform_device *dev)
+int sdhci_pltfm_resume(struct platform_device *dev)
 {
 	struct sdhci_host *host = platform_get_drvdata(dev);
 
 	return sdhci_resume_host(host);
 }
-#else
-#define sdhci_pltfm_suspend	NULL
-#define sdhci_pltfm_resume	NULL
+EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
 #endif	/* CONFIG_PM */
 
-static struct platform_driver sdhci_pltfm_driver = {
-	.driver = {
-		.name	= "sdhci",
-		.owner	= THIS_MODULE,
-	},
-	.probe		= sdhci_pltfm_probe,
-	.remove		= __devexit_p(sdhci_pltfm_remove),
-	.id_table	= sdhci_pltfm_ids,
-	.suspend	= sdhci_pltfm_suspend,
-	.resume		= sdhci_pltfm_resume,
-};
-
-/*****************************************************************************\
- *                                                                           *
- * Driver init/exit                                                          *
- *                                                                           *
-\*****************************************************************************/
-
-static int __init sdhci_drv_init(void)
+static int __init sdhci_pltfm_drv_init(void)
 {
-	return platform_driver_register(&sdhci_pltfm_driver);
+	pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
+
+	return 0;
 }
+module_init(sdhci_pltfm_drv_init);
 
-static void __exit sdhci_drv_exit(void)
+static void __exit sdhci_pltfm_drv_exit(void)
 {
-	platform_driver_unregister(&sdhci_pltfm_driver);
 }
+module_exit(sdhci_pltfm_drv_exit);
 
-module_init(sdhci_drv_init);
-module_exit(sdhci_drv_exit);
-
-MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
-MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
+MODULE_AUTHOR("Intel Corporation");
 MODULE_LICENSE("GPL v2");