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path: root/drivers/usb/dwc3/dwc3-exynos.c
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Diffstat (limited to 'drivers/usb/dwc3/dwc3-exynos.c')
-rw-r--r--drivers/usb/dwc3/dwc3-exynos.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
new file mode 100644
index 00000000000..d1903019808
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -0,0 +1,151 @@
+/**
+ * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dwc3-exynos.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+
+#include "core.h"
+
+struct dwc3_exynos {
+ struct platform_device *dwc3;
+ struct device *dev;
+
+ struct clk *clk;
+};
+
+static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
+{
+ struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
+ struct platform_device *dwc3;
+ struct dwc3_exynos *exynos;
+ struct clk *clk;
+
+ int devid;
+ int ret = -ENOMEM;
+
+ exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
+ if (!exynos) {
+ dev_err(&pdev->dev, "not enough memory\n");
+ goto err0;
+ }
+
+ platform_set_drvdata(pdev, exynos);
+
+ devid = dwc3_get_device_id();
+ if (devid < 0)
+ goto err1;
+
+ dwc3 = platform_device_alloc("dwc3", devid);
+ if (!dwc3) {
+ dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
+ goto err2;
+ }
+
+ clk = clk_get(&pdev->dev, "usbdrd30");
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "couldn't get clock\n");
+ ret = -EINVAL;
+ goto err3;
+ }
+
+ dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
+
+ dwc3->dev.parent = &pdev->dev;
+ dwc3->dev.dma_mask = pdev->dev.dma_mask;
+ dwc3->dev.dma_parms = pdev->dev.dma_parms;
+ exynos->dwc3 = dwc3;
+ exynos->dev = &pdev->dev;
+ exynos->clk = clk;
+
+ clk_enable(exynos->clk);
+
+ /* PHY initialization */
+ if (!pdata) {
+ dev_dbg(&pdev->dev, "missing platform data\n");
+ } else {
+ if (pdata->phy_init)
+ pdata->phy_init(pdev, pdata->phy_type);
+ }
+
+ ret = platform_device_add_resources(dwc3, pdev->resource,
+ pdev->num_resources);
+ if (ret) {
+ dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
+ goto err4;
+ }
+
+ ret = platform_device_add(dwc3);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register dwc3 device\n");
+ goto err4;
+ }
+
+ return 0;
+
+err4:
+ if (pdata && pdata->phy_exit)
+ pdata->phy_exit(pdev, pdata->phy_type);
+
+ clk_disable(clk);
+ clk_put(clk);
+err3:
+ platform_device_put(dwc3);
+err2:
+ dwc3_put_device_id(devid);
+err1:
+ kfree(exynos);
+err0:
+ return ret;
+}
+
+static int __devexit dwc3_exynos_remove(struct platform_device *pdev)
+{
+ struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
+ struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
+
+ platform_device_unregister(exynos->dwc3);
+
+ dwc3_put_device_id(exynos->dwc3->id);
+
+ if (pdata && pdata->phy_exit)
+ pdata->phy_exit(pdev, pdata->phy_type);
+
+ clk_disable(exynos->clk);
+ clk_put(exynos->clk);
+
+ kfree(exynos);
+
+ return 0;
+}
+
+static struct platform_driver dwc3_exynos_driver = {
+ .probe = dwc3_exynos_probe,
+ .remove = __devexit_p(dwc3_exynos_remove),
+ .driver = {
+ .name = "exynos-dwc3",
+ },
+};
+
+module_platform_driver(dwc3_exynos_driver);
+
+MODULE_ALIAS("platform:exynos-dwc3");
+MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");