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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/mmc/host/tmio_mmc.c
Initial import
Diffstat (limited to 'drivers/mmc/host/tmio_mmc.c')
-rw-r--r--drivers/mmc/host/tmio_mmc.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
new file mode 100644
index 000000000..f746df493
--- /dev/null
+++ b/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");