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From 50fb94af95605a73e013d20ccc65f7d269e215b7 Mon Sep 17 00:00:00 2001
From: Vlad Lungu <vlad.lungu@windriver.com>
Date: Wed, 28 Mar 2012 11:34:18 +0100
Subject: [PATCH] Add support for SDHCI on Zynq via OF
Signed-off-by: Vlad Lungu <vlad.lungu@windriver.com>
---
drivers/mmc/host/Kconfig | 13 +++++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-of-xilinxps.c | 84 ++++++++++++++++++++++++++++++++++
3 files changed, 98 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/host/sdhci-of-xilinxps.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index cf444b0..fab6847 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -118,6 +118,19 @@ config MMC_SDHCI_OF_HLWD
If unsure, say N.
+config MMC_SDHCI_OF_XILINX_PS
+ tristate "SDHCI OF support for the Xilinx Zynq SDHCI controllers"
+ depends on MMC_SDHCI_PLTFM
+ depends on OF
+ depends on ARCH_ZYNQ || ARCH_XILINX
+ help
+ This selects the Secure Digital Host Controller Interface (SDHCI)
+ found in the Xilinx Zynq EPP.
+
+ If you have a controller with this interface, say Y or M here.
+
+ If unsure, say N.
+
config MMC_SDHCI_CNS3XXX
tristate "SDHCI support on the Cavium Networks CNS3xxx SoC"
depends on ARCH_CNS3XXX
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index b4b83f3..b58b1a1 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_MMC_SDHCI_DOVE) += sdhci-dove.o
obj-$(CONFIG_MMC_SDHCI_TEGRA) += sdhci-tegra.o
obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o
obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o
+obj-$(CONFIG_MMC_SDHCI_OF_XILINX_PS) += sdhci-of-xilinxps.o
ifeq ($(CONFIG_CB710_DEBUG),y)
CFLAGS-cb710-mmc += -DDEBUG
diff --git a/drivers/mmc/host/sdhci-of-xilinxps.c b/drivers/mmc/host/sdhci-of-xilinxps.c
new file mode 100644
index 0000000..2a9bd1c
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-xilinxps.c
@@ -0,0 +1,84 @@
+/*
+ * drivers/mmc/host/sdhci-of-zynq.c
+ *
+ * Xilinx Zynq Host Controller Interface.
+ * Copyright (c) 2012 Wind River Systems, Inc.
+ *
+ * Based on sdhci-of-esdhc.c
+ *
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/mmc/host.h>
+#include "sdhci-pltfm.h"
+
+static unsigned int zynq_of_get_max_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ return pltfm_host->clock;
+}
+
+static struct sdhci_ops sdhci_zynq_ops = {
+ .get_max_clock = zynq_of_get_max_clock,
+};
+
+static struct sdhci_pltfm_data sdhci_zynq_pdata = {
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .ops = &sdhci_zynq_ops,
+};
+
+static int __devinit sdhci_zynq_probe(struct platform_device *pdev)
+{
+ return sdhci_pltfm_register(pdev, &sdhci_zynq_pdata);
+}
+
+static int __devexit sdhci_zynq_remove(struct platform_device *pdev)
+{
+ return sdhci_pltfm_unregister(pdev);
+}
+
+static const struct of_device_id sdhci_zynq_of_match[] = {
+ { .compatible = "xlnx,ps7-sdhci-1.00.a" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sdhci_zynq_of_match);
+
+static struct platform_driver sdhci_zynq_driver = {
+ .driver = {
+ .name = "sdhci-zynq",
+ .owner = THIS_MODULE,
+ .of_match_table = sdhci_zynq_of_match,
+ .pm = SDHCI_PLTFM_PMOPS,
+ },
+ .probe = sdhci_zynq_probe,
+ .remove = __devexit_p(sdhci_zynq_remove),
+};
+
+static int __init sdhci_zynq_init(void)
+{
+ return platform_driver_register(&sdhci_zynq_driver);
+}
+module_init(sdhci_zynq_init);
+
+static void __exit sdhci_zynq_exit(void)
+{
+ platform_driver_unregister(&sdhci_zynq_driver);
+}
+module_exit(sdhci_zynq_exit);
+
+MODULE_DESCRIPTION("SDHCI OF driver for Xilinx Zynq");
+MODULE_AUTHOR("Vlad Lungu <vlad.lungu@windriver.com>");
+MODULE_LICENSE("GPL v2");
--
1.7.7
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