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path: root/drivers/usb/chipidea/ci_hdrc_usb2.c
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Diffstat (limited to 'drivers/usb/chipidea/ci_hdrc_usb2.c')
-rw-r--r--drivers/usb/chipidea/ci_hdrc_usb2.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c
new file mode 100644
index 000000000..dc86b1206
--- /dev/null
+++ b/drivers/usb/chipidea/ci_hdrc_usb2.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2014 Marvell Technology Group Ltd.
+ *
+ * Antoine Tenart <antoine.tenart@free-electrons.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.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 const struct ci_hdrc_platform_data ci_default_pdata = {
+ .capoffset = DEF_CAPOFFSET,
+ .flags = CI_HDRC_DISABLE_STREAMING,
+};
+
+static const struct ci_hdrc_platform_data ci_zynq_pdata = {
+ .capoffset = DEF_CAPOFFSET,
+ .flags = CI_HDRC_PHY_VBUS_CONTROL,
+};
+
+static const struct ci_hdrc_platform_data ci_zevio_pdata = {
+ .capoffset = DEF_CAPOFFSET,
+ .flags = CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
+};
+
+static const struct of_device_id ci_hdrc_usb2_of_match[] = {
+ { .compatible = "chipidea,usb2" },
+ { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
+ { .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
+
+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;
+ const struct of_device_id *match;
+
+ if (!ci_pdata) {
+ ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
+ if (!ci_pdata)
+ return -ENOMEM;
+ *ci_pdata = ci_default_pdata; /* struct copy */
+ }
+
+ match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
+ if (match && match->data) {
+ /* struct copy */
+ *ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(priv->clk))
+ return PTR_ERR(priv->clk);
+
+ ret = clk_prepare_enable(priv->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable the clock: %d\n", ret);
+ return ret;
+ }
+
+ 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:
+ 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 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");