GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/usb/host/dwc3-of-simple.c

@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * dwc3-of-simple.c - OF glue layer for simple integrations
+ *
+ * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * Copyright (C) 2018 BayLibre, SAS
+ * Author: Neil Armstrong <narmstron@baylibre.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <reset.h>
+#include <clk.h>
+
+struct dwc3_of_simple {
+	struct clk_bulk		clks;
+	struct reset_ctl_bulk	resets;
+};
+
+static int dwc3_of_simple_reset_init(struct udevice *dev,
+				     struct dwc3_of_simple *simple)
+{
+	int ret;
+
+	ret = reset_get_bulk(dev, &simple->resets);
+	if (ret == -ENOTSUPP)
+		return 0;
+	else if (ret)
+		return ret;
+
+	ret = reset_deassert_bulk(&simple->resets);
+	if (ret) {
+		reset_release_bulk(&simple->resets);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dwc3_of_simple_clk_init(struct udevice *dev,
+				   struct dwc3_of_simple *simple)
+{
+	int ret;
+
+	ret = clk_get_bulk(dev, &simple->clks);
+	if (ret == -ENOSYS)
+		return 0;
+	if (ret)
+		return ret;
+
+#if CONFIG_IS_ENABLED(CLK)
+	ret = clk_enable_bulk(&simple->clks);
+	if (ret) {
+		clk_release_bulk(&simple->clks);
+		return ret;
+	}
+#endif
+
+	return 0;
+}
+
+static int dwc3_of_simple_probe(struct udevice *dev)
+{
+	struct dwc3_of_simple *simple = dev_get_platdata(dev);
+	int ret;
+
+	ret = dwc3_of_simple_clk_init(dev, simple);
+	if (ret)
+		return ret;
+
+	ret = dwc3_of_simple_reset_init(dev, simple);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int dwc3_of_simple_remove(struct udevice *dev)
+{
+	struct dwc3_of_simple *simple = dev_get_platdata(dev);
+
+	reset_release_bulk(&simple->resets);
+
+	clk_release_bulk(&simple->clks);
+
+	return dm_scan_fdt_dev(dev);
+}
+
+static const struct udevice_id dwc3_of_simple_ids[] = {
+	{ .compatible = "amlogic,meson-gxl-dwc3" },
+	{ .compatible = "rockchip,rk3399-dwc3" },
+	{ .compatible = "ti,dwc3" },
+	{ }
+};
+
+U_BOOT_DRIVER(dwc3_of_simple) = {
+	.name = "dwc3-of-simple",
+	.id = UCLASS_SIMPLE_BUS,
+	.of_match = dwc3_of_simple_ids,
+	.probe = dwc3_of_simple_probe,
+	.remove = dwc3_of_simple_remove,
+	.platdata_auto_alloc_size = sizeof(struct dwc3_of_simple),
+	.flags = DM_FLAG_ALLOC_PRIV_DMA,
+};