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

source/bootloader/u-boot-2020.01/drivers/remoteproc/ti_k3_arm64_rproc.c

@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Texas Instruments' K3 ARM64 Remoteproc driver
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ *	Lokesh Vutla <lokeshvutla@ti.com>
+ *
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <remoteproc.h>
+#include <errno.h>
+#include <clk.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <power-domain.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
+#include "ti_sci_proc.h"
+
+#define INVALID_ID	0xffff
+
+#define GTC_CNTCR_REG	0x0
+#define GTC_CNTR_EN	0x3
+
+/**
+ * struct k3_arm64_privdata - Structure representing Remote processor data.
+ * @rproc_pwrdmn:	rproc power domain data
+ * @rproc_rst:		rproc reset control data
+ * @sci:		Pointer to TISCI handle
+ * @tsp:		TISCI processor control helper structure
+ * @gtc_base:		Timer base address.
+ */
+struct k3_arm64_privdata {
+	struct power_domain rproc_pwrdmn;
+	struct power_domain gtc_pwrdmn;
+	struct reset_ctl rproc_rst;
+	struct ti_sci_proc tsp;
+	void *gtc_base;
+};
+
+/**
+ * k3_arm64_load() - Load up the Remote processor image
+ * @dev:	rproc device pointer
+ * @addr:	Address at which image is available
+ * @size:	size of the image
+ *
+ * Return: 0 if all goes good, else appropriate error message.
+ */
+static int k3_arm64_load(struct udevice *dev, ulong addr, ulong size)
+{
+	struct k3_arm64_privdata *rproc = dev_get_priv(dev);
+	int ret;
+
+	dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
+
+	/* request for the processor */
+	ret = ti_sci_proc_request(&rproc->tsp);
+	if (ret)
+		return ret;
+
+	return ti_sci_proc_set_config(&rproc->tsp, addr, 0, 0);
+}
+
+/**
+ * k3_arm64_start() - Start the remote processor
+ * @dev:	rproc device pointer
+ *
+ * Return: 0 if all went ok, else return appropriate error
+ */
+static int k3_arm64_start(struct udevice *dev)
+{
+	struct k3_arm64_privdata *rproc = dev_get_priv(dev);
+	int ret;
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	ret = power_domain_on(&rproc->gtc_pwrdmn);
+	if (ret) {
+		dev_err(dev, "power_domain_on() failed: %d\n", ret);
+		return ret;
+	}
+
+	/* Enable the timer before starting remote core */
+	writel(GTC_CNTR_EN, rproc->gtc_base + GTC_CNTCR_REG);
+
+	/*
+	 * Setting the right clock frequency would have taken care by
+	 * assigned-clock-rates during the device probe. So no need to
+	 * set the frequency again here.
+	 */
+	ret = power_domain_on(&rproc->rproc_pwrdmn);
+	if (ret) {
+		dev_err(dev, "power_domain_on() failed: %d\n", ret);
+		return ret;
+	}
+
+	return ti_sci_proc_release(&rproc->tsp);
+}
+
+/**
+ * k3_arm64_init() - Initialize the remote processor
+ * @dev:	rproc device pointer
+ *
+ * Return: 0 if all went ok, else return appropriate error
+ */
+static int k3_arm64_init(struct udevice *dev)
+{
+	dev_dbg(dev, "%s\n", __func__);
+
+	/* Enable the module */
+	dev_dbg(dev, "%s: rproc successfully initialized\n", __func__);
+
+	return 0;
+}
+
+static const struct dm_rproc_ops k3_arm64_ops = {
+	.init = k3_arm64_init,
+	.load = k3_arm64_load,
+	.start = k3_arm64_start,
+};
+
+static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
+{
+	dev_dbg(dev, "%s\n", __func__);
+
+	tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
+	if (IS_ERR(tsp->sci)) {
+		dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
+		return PTR_ERR(tsp->sci);
+	}
+
+	tsp->proc_id = dev_read_u32_default(dev, "ti,sci-proc-id", INVALID_ID);
+	if (tsp->proc_id == INVALID_ID) {
+		dev_err(dev, "proc id not populated\n");
+		return -ENOENT;
+	}
+	tsp->host_id = dev_read_u32_default(dev, "ti,sci-host-id", INVALID_ID);
+	tsp->ops = &tsp->sci->ops.proc_ops;
+
+	return 0;
+}
+
+/**
+ * k3_of_to_priv() - generate private data from device tree
+ * @dev:	corresponding k3 remote processor device
+ * @priv:	pointer to driver specific private data
+ *
+ * Return: 0 if all goes good, else appropriate error message.
+ */
+static int k3_arm64_of_to_priv(struct udevice *dev,
+			       struct k3_arm64_privdata *rproc)
+{
+	int ret;
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	ret = power_domain_get_by_index(dev, &rproc->rproc_pwrdmn, 1);
+	if (ret) {
+		dev_err(dev, "power_domain_get() failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = power_domain_get_by_index(dev, &rproc->gtc_pwrdmn, 0);
+	if (ret) {
+		dev_err(dev, "power_domain_get() failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = reset_get_by_index(dev, 0, &rproc->rproc_rst);
+	if (ret) {
+		dev_err(dev, "reset_get() failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = ti_sci_proc_of_to_priv(dev, &rproc->tsp);
+	if (ret)
+		return ret;
+
+	rproc->gtc_base = dev_read_addr_ptr(dev);
+	if (!rproc->gtc_base) {
+		dev_err(dev, "Get address failed\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/**
+ * k3_arm64_probe() - Basic probe
+ * @dev:	corresponding k3 remote processor device
+ *
+ * Return: 0 if all goes good, else appropriate error message.
+ */
+static int k3_arm64_probe(struct udevice *dev)
+{
+	struct k3_arm64_privdata *priv;
+	int ret;
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	priv = dev_get_priv(dev);
+
+	ret = k3_arm64_of_to_priv(dev, priv);
+	if (ret) {
+		dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
+		return ret;
+	}
+
+	dev_dbg(dev, "Remoteproc successfully probed\n");
+
+	return 0;
+}
+
+static const struct udevice_id k3_arm64_ids[] = {
+	{ .compatible = "ti,am654-arm64"},
+	{ .compatible = "ti,am654-rproc"},
+	{}
+};
+
+U_BOOT_DRIVER(k3_arm64) = {
+	.name = "k3_arm64",
+	.of_match = k3_arm64_ids,
+	.id = UCLASS_REMOTEPROC,
+	.ops = &k3_arm64_ops,
+	.probe = k3_arm64_probe,
+	.priv_auto_alloc_size = sizeof(struct k3_arm64_privdata),
+	.flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
+};