--- /dev/null
+/*
+ * 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");
+
Code Review / kvmfornfv.git / blobdiff