Adding upstream version 2.10.0+dfsg.upstream/2.10.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 346 insertions, 0 deletions

diff --git a/plat/xilinx/common/plat_console.c b/plat/xilinx/common/plat_console.c
new file mode 100644
index 0000000..0c0e74b
--- /dev/null
+++ b/plat/xilinx/common/plat_console.c
@@ -0,0 +1,346 @@
+/*
+ * Copyright (c) 2023, Advanced Micro Devices, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <common/debug.h>
+#include <common/fdt_fixup.h>
+#include <common/fdt_wrappers.h>
+#include <drivers/arm/dcc.h>
+#include <drivers/arm/pl011.h>
+#include <drivers/cadence/cdns_uart.h>
+#include <drivers/console.h>
+#include <libfdt.h>
+#include <plat_console.h>
+
+#include <platform_def.h>
+#include <plat_private.h>
+
+static console_t console;
+
+#if (defined(XILINX_OF_BOARD_DTB_ADDR) && !IS_TFA_IN_OCM(BL31_BASE))
+/**
+ * get_baudrate() - Get the baudrate form DTB.
+ * @dtb: Address of the Device Tree Blob (DTB).
+ *
+ * Return: On success returns the baudrate; on failure returns an error.
+ */
+static int32_t get_baudrate(void *dtb)
+{
+	int node;
+	int32_t ret = 0;
+	const char *prop, *path;
+	char *end;
+	int32_t baud_rate = 0;
+
+	node = fdt_path_offset(dtb, "/secure-chosen");
+	if (node < 0) {
+		node = fdt_path_offset(dtb, "/chosen");
+		if (node < 0) {
+			ret = -FDT_ERR_NOTFOUND;
+			goto error;
+		}
+	}
+
+	prop = fdt_getprop(dtb, node, "stdout-path", NULL);
+	if (prop == NULL) {
+		ret = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+	/* Parse string serial0:115200n8 */
+	path = strchr(prop, ':');
+	if (!path) {
+		ret = -FDT_ERR_NOTFOUND;
+		goto error;
+	} else {
+
+		baud_rate = strtoul(path + 1, &end, 10);
+		if (baud_rate == 0 && end == path) {
+			ERROR("Conversion error occurred: %d\n", baud_rate);
+			ret = -FDT_ERR_NOTFOUND;
+			goto error;
+		}
+		ret = baud_rate;
+	}
+
+error:
+	return ret;
+}
+
+/**
+ * get_node_status() - Get the DTB node status.
+ * @dtb: Address of the Device Tree Blob (DTB).
+ * @node: Node address in the device tree.
+ *
+ * Return: On success, it returns 1; on failure, it returns an 0.
+ */
+static uint32_t get_node_status(void *dtb, int node)
+{
+	const char *status_cell;
+	uint32_t status = 0;
+
+	status_cell = fdt_getprop(dtb, node, "status", NULL);
+	if (!status_cell || strcmp(status_cell, "okay") == 0) {
+		status = 1;
+	} else {
+		status = 0;
+	}
+
+	return status;
+}
+
+/**
+ * fdt_add_uart_info() - Add DTB information to a UART structure.
+ * @info: Pointer to the UART information structure.
+ * @node: Node address in the device tree.
+ * @dtb: Address of the Device Tree Blob(DTB).
+ *
+ * Return: On success, it returns 1; on failure, it returns an 0.
+ */
+static uint32_t fdt_add_uart_info(dt_uart_info_t *info, int node, void *dtb)
+{
+	uintptr_t base_addr;
+	const char *com;
+	uint32_t ret = 0;
+
+	com = fdt_getprop(dtb, node, "compatible", NULL);
+	if (com != NULL) {
+		strlcpy(info->compatible, com, sizeof(info->compatible));
+	} else {
+		ERROR("Compatible property not found in DTB node\n");
+		ret  = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+	ret = fdt_get_reg_props_by_index(dtb, node, 0, &base_addr, NULL);
+	if (ret >= 0) {
+		info->base = base_addr;
+	} else {
+		ERROR("Failed to retrieve base address. Error code: %d\n", ret);
+		ret  = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+	info->status = get_node_status(dtb, node);
+	info->baud_rate = get_baudrate(dtb);
+
+error:
+	return ret;
+}
+
+/**
+ * fdt_get_uart_info() - Get the uart information form DTB.
+ * @info: Pointer to the UART information structure.
+ *
+ * Return: On success, it returns 0; on failure, it returns an error+reason.
+ */
+static int fdt_get_uart_info(dt_uart_info_t *info)
+{
+	int node, ret = 0;
+	void *dtb = (void *)XILINX_OF_BOARD_DTB_ADDR;
+
+	if (fdt_check_header(dtb) != 0) {
+		ERROR("Can't read DT at %p\n", dtb);
+		ret  = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+	ret = fdt_open_into(dtb, dtb, XILINX_OF_BOARD_DTB_MAX_SIZE);
+	if (ret < 0) {
+		ERROR("Invalid Device Tree at %p: error %d\n", dtb, ret);
+		ret  = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+	node = fdt_get_stdout_node_offset(dtb);
+	if (node < 0) {
+		ERROR("DT get stdout node failed : %d\n", node);
+		ret  = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+	ret = fdt_add_uart_info(info, node, dtb);
+	if (ret < 0) {
+		ERROR("Failed to add DT UART info: %d\n", ret);
+		ret  = -FDT_ERR_NOTFOUND;
+		goto error;
+	}
+
+error:
+	return ret;
+}
+
+/**
+ * check_fdt_uart_info() - Check early uart info with DTB uart info.
+ * @info: Pointer to the UART information structure.
+ *
+ * Return: On success, it returns 0; on failure, it returns an error+reason.
+ */
+static int check_fdt_uart_info(dt_uart_info_t *info)
+{
+	uint32_t ret = 0;
+
+	if (info->status == 0) {
+		ret = -ENODEV;
+		goto error;
+	}
+
+	if ((info->base == console.base) &&
+	   (info->baud_rate == UART_BAUDRATE) && !CONSOLE_IS(dcc)) {
+		ret = -ENODEV;
+		goto error;
+	}
+
+error:
+	return ret;
+}
+
+/**
+ * console_boot_end() - Unregister the console_t instance form the console list.
+ * @boot_console: Pointer to the console information structure.
+ */
+static void console_boot_end(console_t *boot_console)
+{
+	if (CONSOLE_IS(dcc)) {
+		console_dcc_unregister();
+	} else {
+		console_flush();
+		(void)console_unregister(boot_console);
+	}
+}
+
+/**
+ * setup_runtime_console() - Registers the runtime uart with console list.
+ * @clock: UART clock.
+ * @info: Pointer to the UART information structure.
+ */
+static void setup_runtime_console(uint32_t clock, dt_uart_info_t *info)
+{
+	static console_t bl31_runtime_console;
+	uint32_t rc;
+
+#if defined(PLAT_zynqmp)
+	rc = console_cdns_register(info->base,
+				   clock,
+				   info->baud_rate,
+				   &bl31_runtime_console);
+#else
+	rc = console_pl011_register(info->base,
+				    clock,
+				    info->baud_rate,
+				    &bl31_runtime_console);
+#endif
+	if (rc == 0) {
+		panic();
+	}
+
+	console_set_scope(&bl31_runtime_console,
+			  CONSOLE_FLAG_BOOT | CONSOLE_FLAG_RUNTIME |
+			  CONSOLE_FLAG_CRASH);
+}
+
+
+/**
+ * runtime_console_init() - Initializes the run time console information.
+ * @uart_info: Pointer to the UART information structure.
+ * @bl31_boot_console: Pointer to the console information structure.
+ * @clock: UART clock.
+ *
+ * Return: On success, it returns 0; on failure, it returns an error+reason;
+ */
+static int32_t runtime_console_init(dt_uart_info_t *uart_info,
+			  console_t *bl31_boot_console,
+			  uint32_t clock)
+{
+	int32_t rc = 0;
+
+	/* Parse UART information from Device Tree Blob (DTB) */
+	rc = fdt_get_uart_info(uart_info);
+	if (rc < 0) {
+		rc = -FDT_ERR_NOTFOUND;
+	}
+
+	if (strncmp(uart_info->compatible, DT_UART_COMPAT,
+		   strlen(DT_UART_COMPAT)) == 0) {
+
+		if (check_fdt_uart_info(uart_info) == 0) {
+			setup_runtime_console(clock, uart_info);
+			console_boot_end(bl31_boot_console);
+			INFO("Runtime console setup\n");
+		} else {
+			INFO("Early console and DTB console are same\n");
+		}
+	} else if (strncmp(uart_info->compatible, DT_UART_DCC_COMPAT,
+			  strlen(DT_UART_DCC_COMPAT)) == 0) {
+		rc = console_dcc_register();
+		if (rc == 0) {
+			panic();
+		}
+		console_boot_end(bl31_boot_console);
+	} else {
+		WARN("BL31: No console device found in DT.\n");
+	}
+
+	return rc;
+}
+#endif
+
+void setup_console(void)
+{
+	uint32_t rc;
+	uint32_t uart_clk = get_uart_clk();
+
+#if defined(PLAT_zynqmp)
+	if (CONSOLE_IS(cadence) || (CONSOLE_IS(cadence1))) {
+		rc = console_cdns_register(UART_BASE,
+					   uart_clk,
+					   UART_BAUDRATE,
+					   &console);
+		if (rc == 0) {
+			panic();
+		}
+
+		console_set_scope(&console, CONSOLE_FLAG_BOOT |
+				  CONSOLE_FLAG_RUNTIME | CONSOLE_FLAG_CRASH);
+	}
+#else
+	if (CONSOLE_IS(pl011) || (CONSOLE_IS(pl011_1))) {
+		/* Initialize the console to provide early debug support */
+		rc = console_pl011_register((uint32_t)UART_BASE,
+					   uart_clk,
+					   (uint32_t)UART_BAUDRATE,
+					   &console);
+		if (rc == 0) {
+			panic();
+		}
+
+		console_set_scope(&console, CONSOLE_FLAG_BOOT |
+				  CONSOLE_FLAG_RUNTIME | CONSOLE_FLAG_CRASH);
+	}
+#endif
+	if (CONSOLE_IS(dcc)) {
+		/* Initialize the dcc console for debug */
+		rc = console_dcc_register();
+		if (rc == 0) {
+			panic();
+		}
+	}
+	INFO("BL31: Early console setup\n");
+
+#if (defined(XILINX_OF_BOARD_DTB_ADDR) && !IS_TFA_IN_OCM(BL31_BASE))
+	static dt_uart_info_t uart_info = {0};
+
+	/* Initialize the runtime console using UART information from the DTB */
+	rc = runtime_console_init(&uart_info, &console, uart_clk);
+	if (rc < 0) {
+		ERROR("Failed to initialize runtime console: %d\n", rc);
+	}
+#endif
+}