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

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
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+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <reset-uclass.h>
+#include <linux/io.h>
+#include <asm/arch-rockchip/hardware.h>
+#include <dm/lists.h>
+/*
+ * Each reg has 16 bits reset signal for devices
+ * Note: Not including rk2818 and older SoCs
+ */
+#define ROCKCHIP_RESET_NUM_IN_REG	16
+
+struct rockchip_reset_priv {
+	void __iomem *base;
+	/* Rockchip reset reg locate at cru controller */
+	u32 reset_reg_offset;
+	/* Rockchip reset reg number */
+	u32 reset_reg_num;
+};
+
+static int rockchip_reset_request(struct reset_ctl *reset_ctl)
+{
+	struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
+
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_num=%d)\n", __func__,
+	      reset_ctl, reset_ctl->dev, reset_ctl->id, priv->reset_reg_num);
+
+	if (reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG >= priv->reset_reg_num)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int rockchip_reset_free(struct reset_ctl *reset_ctl)
+{
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
+	      reset_ctl->dev, reset_ctl->id);
+
+	return 0;
+}
+
+static int rockchip_reset_assert(struct reset_ctl *reset_ctl)
+{
+	struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
+	int bank =  reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG;
+	int offset =  reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG;
+
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
+	      reset_ctl, reset_ctl->dev, reset_ctl->id,
+	      priv->base + (bank * 4));
+
+	rk_setreg(priv->base + (bank * 4), BIT(offset));
+
+	return 0;
+}
+
+static int rockchip_reset_deassert(struct reset_ctl *reset_ctl)
+{
+	struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
+	int bank =  reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG;
+	int offset =  reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG;
+
+	debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
+	      reset_ctl, reset_ctl->dev, reset_ctl->id,
+	      priv->base + (bank * 4));
+
+	rk_clrreg(priv->base + (bank * 4), BIT(offset));
+
+	return 0;
+}
+
+struct reset_ops rockchip_reset_ops = {
+	.request = rockchip_reset_request,
+	.free = rockchip_reset_free,
+	.rst_assert = rockchip_reset_assert,
+	.rst_deassert = rockchip_reset_deassert,
+};
+
+static int rockchip_reset_probe(struct udevice *dev)
+{
+	struct rockchip_reset_priv *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
+	fdt_size_t size;
+
+	addr = dev_read_addr_size(dev, "reg", &size);
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	if ((priv->reset_reg_offset == 0) && (priv->reset_reg_num == 0))
+		return -EINVAL;
+
+	addr += priv->reset_reg_offset;
+	priv->base = ioremap(addr, size);
+
+	debug("%s(base=%p) (reg_offset=%x, reg_num=%d)\n", __func__,
+	      priv->base, priv->reset_reg_offset, priv->reset_reg_num);
+
+	return 0;
+}
+
+int rockchip_reset_bind(struct udevice *pdev, u32 reg_offset, u32 reg_number)
+{
+	struct udevice *rst_dev;
+	struct rockchip_reset_priv *priv;
+	int ret;
+
+	 ret = device_bind_driver_to_node(pdev, "rockchip_reset", "reset",
+					  dev_ofnode(pdev), &rst_dev);
+	if (ret) {
+		debug("Warning: No rockchip reset driver: ret=%d\n", ret);
+		return ret;
+	}
+	priv = malloc(sizeof(struct rockchip_reset_priv));
+	priv->reset_reg_offset = reg_offset;
+	priv->reset_reg_num = reg_number;
+	rst_dev->priv = priv;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(rockchip_reset) = {
+	.name = "rockchip_reset",
+	.id = UCLASS_RESET,
+	.probe = rockchip_reset_probe,
+	.ops = &rockchip_reset_ops,
+	.priv_auto_alloc_size = sizeof(struct rockchip_reset_priv),
+};