Initial import

1 files changed, 241 insertions, 0 deletions

diff --git a/drivers/mfd/tc6387xb.c b/drivers/mfd/tc6387xb.c
new file mode 100644
index 000000000..85fab3729
--- /dev/null
+++ b/drivers/mfd/tc6387xb.c
@@ -0,0 +1,241 @@
+/*
+ * Toshiba TC6387XB support
+ * Copyright (c) 2005 Ian Molton
+ *
+ * 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.
+ *
+ * This file contains TC6387XB base support.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mfd/tc6387xb.h>
+#include <linux/slab.h>
+
+enum {
+	TC6387XB_CELL_MMC,
+};
+
+struct tc6387xb {
+	void __iomem *scr;
+	struct clk *clk32k;
+	struct resource rscr;
+};
+
+static struct resource tc6387xb_mmc_resources[] = {
+	{
+		.start = 0x800,
+		.end   = 0x9ff,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = 0,
+		.end   = 0,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+/*--------------------------------------------------------------------------*/
+
+#ifdef CONFIG_PM
+static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+	struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
+
+	if (pdata && pdata->suspend)
+		pdata->suspend(dev);
+	clk_disable_unprepare(tc6387xb->clk32k);
+
+	return 0;
+}
+
+static int tc6387xb_resume(struct platform_device *dev)
+{
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+	struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
+
+	clk_prepare_enable(tc6387xb->clk32k);
+	if (pdata && pdata->resume)
+		pdata->resume(dev);
+
+	tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0,
+		tc6387xb_mmc_resources[0].start & 0xfffe);
+
+	return 0;
+}
+#else
+#define tc6387xb_suspend  NULL
+#define tc6387xb_resume   NULL
+#endif
+
+/*--------------------------------------------------------------------------*/
+
+static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state)
+{
+	struct platform_device *dev = to_platform_device(mmc->dev.parent);
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+
+	tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state);
+}
+
+static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state)
+{
+	struct platform_device *dev = to_platform_device(mmc->dev.parent);
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+
+	tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state);
+}
+
+
+static int tc6387xb_mmc_enable(struct platform_device *mmc)
+{
+	struct platform_device *dev      = to_platform_device(mmc->dev.parent);
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+
+	clk_prepare_enable(tc6387xb->clk32k);
+
+	tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0,
+		tc6387xb_mmc_resources[0].start & 0xfffe);
+
+	return 0;
+}
+
+static int tc6387xb_mmc_disable(struct platform_device *mmc)
+{
+	struct platform_device *dev      = to_platform_device(mmc->dev.parent);
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+
+	clk_disable_unprepare(tc6387xb->clk32k);
+
+	return 0;
+}
+
+static struct tmio_mmc_data tc6387xb_mmc_data = {
+	.hclk = 24000000,
+	.set_pwr = tc6387xb_mmc_pwr,
+	.set_clk_div = tc6387xb_mmc_clk_div,
+};
+
+/*--------------------------------------------------------------------------*/
+
+static const struct mfd_cell tc6387xb_cells[] = {
+	[TC6387XB_CELL_MMC] = {
+		.name = "tmio-mmc",
+		.enable = tc6387xb_mmc_enable,
+		.disable = tc6387xb_mmc_disable,
+		.platform_data = &tc6387xb_mmc_data,
+		.pdata_size    = sizeof(tc6387xb_mmc_data),
+		.num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
+		.resources = tc6387xb_mmc_resources,
+	},
+};
+
+static int tc6387xb_probe(struct platform_device *dev)
+{
+	struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
+	struct resource *iomem, *rscr;
+	struct clk *clk32k;
+	struct tc6387xb *tc6387xb;
+	int irq, ret;
+
+	iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!iomem)
+		return -EINVAL;
+
+	tc6387xb = kzalloc(sizeof(*tc6387xb), GFP_KERNEL);
+	if (!tc6387xb)
+		return -ENOMEM;
+
+	ret  = platform_get_irq(dev, 0);
+	if (ret >= 0)
+		irq = ret;
+	else
+		goto err_no_irq;
+
+	clk32k = clk_get(&dev->dev, "CLK_CK32K");
+	if (IS_ERR(clk32k)) {
+		ret = PTR_ERR(clk32k);
+		goto err_no_clk;
+	}
+
+	rscr = &tc6387xb->rscr;
+	rscr->name = "tc6387xb-core";
+	rscr->start = iomem->start;
+	rscr->end = iomem->start + 0xff;
+	rscr->flags = IORESOURCE_MEM;
+
+	ret = request_resource(iomem, rscr);
+	if (ret)
+		goto err_resource;
+
+	tc6387xb->scr = ioremap(rscr->start, resource_size(rscr));
+	if (!tc6387xb->scr) {
+		ret = -ENOMEM;
+		goto err_ioremap;
+	}
+
+	tc6387xb->clk32k = clk32k;
+	platform_set_drvdata(dev, tc6387xb);
+
+	if (pdata && pdata->enable)
+		pdata->enable(dev);
+
+	dev_info(&dev->dev, "Toshiba tc6387xb initialised\n");
+
+	ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
+			      ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL);
+
+	if (!ret)
+		return 0;
+
+	iounmap(tc6387xb->scr);
+err_ioremap:
+	release_resource(&tc6387xb->rscr);
+err_resource:
+	clk_put(clk32k);
+err_no_clk:
+err_no_irq:
+	kfree(tc6387xb);
+	return ret;
+}
+
+static int tc6387xb_remove(struct platform_device *dev)
+{
+	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
+
+	mfd_remove_devices(&dev->dev);
+	iounmap(tc6387xb->scr);
+	release_resource(&tc6387xb->rscr);
+	clk_disable_unprepare(tc6387xb->clk32k);
+	clk_put(tc6387xb->clk32k);
+	kfree(tc6387xb);
+
+	return 0;
+}
+
+
+static struct platform_driver tc6387xb_platform_driver = {
+	.driver = {
+		.name		= "tc6387xb",
+	},
+	.probe		= tc6387xb_probe,
+	.remove		= tc6387xb_remove,
+	.suspend        = tc6387xb_suspend,
+	.resume         = tc6387xb_resume,
+};
+
+module_platform_driver(tc6387xb_platform_driver);
+
+MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Ian Molton");
+MODULE_ALIAS("platform:tc6387xb");
+