From: Magnus Damm <damm@xxxxxxxxxxxxx>
This patch adds an MFD driver for the SuperH Mobile SDHI
hardware block. At this point the driver simply wraps the
tmio-mmc driver with some clock code. In the future this
driver is the place to put SDHI specific hotplug code.
Signed-off-by: Magnus Damm <damm@xxxxxxxxxxxxx>
---
drivers/mfd/Kconfig | 8 ++
drivers/mfd/Makefile | 1
drivers/mfd/sh_mobile_sdhi.c | 145 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 154 insertions(+)
--- 0001/drivers/mfd/Kconfig
+++ work/drivers/mfd/Kconfig 2009-10-01 11:22:18.000000000 +0900
@@ -35,6 +35,14 @@ config MFD_ASIC3
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)
+config MFD_SH_MOBILE_SDHI
+ bool "Support for SuperH Mobile SDHI"
+ depends on SUPERH
+ select MFD_CORE
+ ---help---
+ This driver supports the SDHI hardware block found in many
+ SuperH Mobile SoC:s.
+
config MFD_DM355EVM_MSP
bool "DaVinci DM355 EVM microcontroller"
depends on I2C && MACH_DAVINCI_DM355_EVM
--- 0002/drivers/mfd/Makefile
+++ work/drivers/mfd/Makefile 2009-10-01 10:58:05.000000000 +0900
@@ -4,6 +4,7 @@
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o
+obj-$(CONFIG_MFD_SH_MOBILE_SDHI) += sh_mobile_sdhi.o
obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
--- /dev/null
+++ work/drivers/mfd/sh_mobile_sdhi.c 2009-10-01 12:07:48.000000000 +0900
@@ -0,0 +1,145 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * 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.
+ *
+ * Based on "Compaq ASIC3 support":
+ *
+ * Copyright 2001 Compaq Computer Corporation.
+ * Copyright 2004-2005 Phil Blundell
+ * Copyright 2007-2008 OpenedHand Ltd.
+ *
+ * Authors: Phil Blundell <pb@xxxxxxxxxxxxx>,
+ * Samuel Ortiz <sameo@xxxxxxxxxxxxxx>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+
+struct sh_mobile_sdhi {
+ struct clk *clk;
+ struct tmio_mmc_data mmc_data;
+ struct mfd_cell cell_mmc;
+};
+
+static struct resource sh_mobile_sdhi_resources[] = {
+ {
+ .start = 0x000,
+ .end = 0x1ff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell sh_mobile_sdhi_cell = {
+ .name = "tmio-mmc",
+ .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
+ .resources = sh_mobile_sdhi_resources,
+};
+
+static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
+{
+ struct sh_mobile_sdhi *priv;
+ struct resource *mem;
+ char clk_name[8];
+ int ret, irq;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ dev_err(&pdev->dev, "missing MEM resource\n");
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ dev_err(&pdev->dev, "missing IRQ resource\n");
+
+ if (!mem || (irq < 0))
+ return -EINVAL;
+
+ priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
+ if (priv == NULL) {
+ dev_err(&pdev->dev, "kzalloc failed\n");
+ return -ENOMEM;
+ }
+
+ snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
+ priv->clk = clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(priv->clk)) {
+ dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+ ret = PTR_ERR(priv->clk);
+ kfree(priv);
+ return ret;
+ }
+
+ clk_enable(priv->clk);
+
+ /* FIXME: silly const unsigned int hclk */
+ *(unsigned int *)&priv->mmc_data.hclk = clk_get_rate(priv->clk);
+
+ memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
+ priv->cell_mmc.driver_data = &priv->mmc_data;
+ priv->cell_mmc.platform_data = &priv->cell_mmc;
+ priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
+
+ platform_set_drvdata(pdev, priv);
+
+ ret = mfd_add_devices(&pdev->dev, pdev->id,
+ &priv->cell_mmc, 1, mem, irq);
+ if (ret) {
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+ kfree(priv);
+ }
+
+ return ret;
+}
+
+static int sh_mobile_sdhi_remove(struct platform_device *pdev)
+{
+ struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
+
+ mfd_remove_devices(&pdev->dev);
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver sh_mobile_sdhi_driver = {
+ .driver = {
+ .name = "sh_mobile_sdhi",
+ .owner = THIS_MODULE,
+ },
+ .probe = sh_mobile_sdhi_probe,
+ .remove = __devexit_p(sh_mobile_sdhi_remove),
+};
+
+static int __init sh_mobile_sdhi_init(void)
+{
+ return platform_driver_register(&sh_mobile_sdhi_driver);
+}
+
+static void __exit sh_mobile_sdhi_exit(void)
+{
+ platform_driver_unregister(&sh_mobile_sdhi_driver);
+}
+
+module_init(sh_mobile_sdhi_init);
+module_exit(sh_mobile_sdhi_exit);
+
+MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
--
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