Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mmc / host / tmio_mmc.c

diff --git a/kernel/drivers/mmc/host/tmio_mmc.c b/kernel/drivers/mmc/host/tmio_mmc.c
new file mode 100644 (file)
index 0000000..f746df4
--- /dev/null
+++ b/kernel/drivers/mmc/host/tmio_mmc.c
@@ -0,0 +1,164 @@
+/*
+ * linux/drivers/mmc/host/tmio_mmc.c
+ *
+ * Copyright (C) 2007 Ian Molton
+ * Copyright (C) 2004 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.
+ *
+ * Driver for the MMC / SD / SDIO cell found in:
+ *
+ * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
+ */
+
+#include <linux/device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <linux/scatterlist.h>
+
+#include "tmio_mmc.h"
+
+#ifdef CONFIG_PM_SLEEP
+static int tmio_mmc_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       const struct mfd_cell *cell = mfd_get_cell(pdev);
+       int ret;
+
+       ret = pm_runtime_force_suspend(dev);
+
+       /* Tell MFD core it can disable us now.*/
+       if (!ret && cell->disable)
+               cell->disable(pdev);
+
+       return ret;
+}
+
+static int tmio_mmc_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       const struct mfd_cell *cell = mfd_get_cell(pdev);
+       int ret = 0;
+
+       /* Tell the MFD core we are ready to be enabled */
+       if (cell->resume)
+               ret = cell->resume(pdev);
+
+       if (!ret)
+               ret = pm_runtime_force_resume(dev);
+
+       return ret;
+}
+#endif
+
+static int tmio_mmc_probe(struct platform_device *pdev)
+{
+       const struct mfd_cell *cell = mfd_get_cell(pdev);
+       struct tmio_mmc_data *pdata;
+       struct tmio_mmc_host *host;
+       struct resource *res;
+       int ret = -EINVAL, irq;
+
+       if (pdev->num_resources != 2)
+               goto out;
+
+       pdata = pdev->dev.platform_data;
+       if (!pdata || !pdata->hclk)
+               goto out;
+
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               ret = irq;
+               goto out;
+       }
+
+       /* Tell the MFD core we are ready to be enabled */
+       if (cell->enable) {
+               ret = cell->enable(pdev);
+               if (ret)
+                       goto out;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res)
+               return -EINVAL;
+
+       pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
+
+       host = tmio_mmc_host_alloc(pdev);
+       if (!host)
+               goto cell_disable;
+
+       /* SD control register space size is 0x200, 0x400 for bus_shift=1 */
+       host->bus_shift = resource_size(res) >> 10;
+
+       ret = tmio_mmc_host_probe(host, pdata);
+       if (ret)
+               goto host_free;
+
+       ret = request_irq(irq, tmio_mmc_irq, IRQF_TRIGGER_FALLING,
+                               dev_name(&pdev->dev), host);
+       if (ret)
+               goto host_remove;
+
+       pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
+               (unsigned long)host->ctl, irq);
+
+       return 0;
+
+host_remove:
+       tmio_mmc_host_remove(host);
+host_free:
+       tmio_mmc_host_free(host);
+cell_disable:
+       if (cell->disable)
+               cell->disable(pdev);
+out:
+       return ret;
+}
+
+static int tmio_mmc_remove(struct platform_device *pdev)
+{
+       const struct mfd_cell *cell = mfd_get_cell(pdev);
+       struct mmc_host *mmc = platform_get_drvdata(pdev);
+
+       if (mmc) {
+               struct tmio_mmc_host *host = mmc_priv(mmc);
+               free_irq(platform_get_irq(pdev, 0), host);
+               tmio_mmc_host_remove(host);
+               if (cell->disable)
+                       cell->disable(pdev);
+       }
+
+       return 0;
+}
+
+/* ------------------- device registration ----------------------- */
+
+static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume)
+       SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
+                       tmio_mmc_host_runtime_resume,
+                       NULL)
+};
+
+static struct platform_driver tmio_mmc_driver = {
+       .driver = {
+               .name = "tmio-mmc",
+               .pm = &tmio_mmc_dev_pm_ops,
+       },
+       .probe = tmio_mmc_probe,
+       .remove = tmio_mmc_remove,
+};
+
+module_platform_driver(tmio_mmc_driver);
+
+MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
+MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tmio-mmc");