Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / chipidea / ci_hdrc_usb2.c

diff --git a/kernel/drivers/usb/chipidea/ci_hdrc_usb2.c b/kernel/drivers/usb/chipidea/ci_hdrc_usb2.c
new file mode 100644 (file)
index 0000000..45844c9
--- /dev/null
+++ b/kernel/drivers/usb/chipidea/ci_hdrc_usb2.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2014 Marvell Technology Group Ltd.
+ *
+ * Antoine Tenart <antoine.tenart@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/usb/chipidea.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/ulpi.h>
+
+#include "ci.h"
+
+struct ci_hdrc_usb2_priv {
+       struct platform_device  *ci_pdev;
+       struct clk              *clk;
+};
+
+static struct ci_hdrc_platform_data ci_default_pdata = {
+       .capoffset      = DEF_CAPOFFSET,
+       .flags          = CI_HDRC_DISABLE_STREAMING,
+};
+
+static int ci_hdrc_usb2_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct ci_hdrc_usb2_priv *priv;
+       struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
+       int ret;
+
+       if (!ci_pdata)
+               ci_pdata = &ci_default_pdata;
+
+       priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+       if (!priv)
+               return -ENOMEM;
+
+       priv->clk = devm_clk_get(dev, NULL);
+       if (!IS_ERR(priv->clk)) {
+               ret = clk_prepare_enable(priv->clk);
+               if (ret) {
+                       dev_err(dev, "failed to enable the clock: %d\n", ret);
+                       return ret;
+               }
+       }
+
+       ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+       if (ret)
+               goto clk_err;
+
+       ci_pdata->name = dev_name(dev);
+
+       priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
+                                          pdev->num_resources, ci_pdata);
+       if (IS_ERR(priv->ci_pdev)) {
+               ret = PTR_ERR(priv->ci_pdev);
+               if (ret != -EPROBE_DEFER)
+                       dev_err(dev,
+                               "failed to register ci_hdrc platform device: %d\n",
+                               ret);
+               goto clk_err;
+       }
+
+       platform_set_drvdata(pdev, priv);
+
+       pm_runtime_no_callbacks(dev);
+       pm_runtime_enable(dev);
+
+       return 0;
+
+clk_err:
+       if (!IS_ERR(priv->clk))
+               clk_disable_unprepare(priv->clk);
+       return ret;
+}
+
+static int ci_hdrc_usb2_remove(struct platform_device *pdev)
+{
+       struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
+
+       pm_runtime_disable(&pdev->dev);
+       ci_hdrc_remove_device(priv->ci_pdev);
+       clk_disable_unprepare(priv->clk);
+
+       return 0;
+}
+
+static const struct of_device_id ci_hdrc_usb2_of_match[] = {
+       { .compatible = "chipidea,usb2" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
+
+static struct platform_driver ci_hdrc_usb2_driver = {
+       .probe  = ci_hdrc_usb2_probe,
+       .remove = ci_hdrc_usb2_remove,
+       .driver = {
+               .name           = "chipidea-usb2",
+               .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
+       },
+};
+module_platform_driver(ci_hdrc_usb2_driver);
+
+MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
+MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
+MODULE_LICENSE("GPL");