realtek: update the tree to the latest refactored version

* rename the target to realtek
* add refactored DSA driver
* add latest gpio driver
* lots of arch cleanups
* new irq driver
* additional boards

Signed-off-by: Bert Vermeulen <bert@biot.com>
Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
Signed-off-by: Sander Vanheule <sander@svanheule.net>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: John Crispin <john@phrozen.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/target/linux/realtek/files-5.4/arch/mips/rtl838x/prom.c b/target/linux/realtek/files-5.4/arch/mips/rtl838x/prom.c
new file mode 100644
index 0000000000..5278afae03
--- /dev/null
+++ b/target/linux/realtek/files-5.4/arch/mips/rtl838x/prom.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * prom.c
+ * Early intialization code for the Realtek RTL838X SoC
+ *
+ * based on the original BSP by
+ * Copyright (C) 2006-2012 Tony Wu (tonywu@realtek.com)
+ * Copyright (C) 2020 B. Koblitz
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/of_fdt.h>
+#include <linux/libfdt.h>
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/page.h>
+#include <asm/cpu.h>
+
+#include <mach-rtl83xx.h>
+
+extern char arcs_cmdline[];
+extern const char __appended_dtb;
+
+struct rtl83xx_soc_info soc_info;
+const void *fdt;
+
+const char *get_system_type(void)
+{
+	return soc_info.name;
+}
+
+void __init prom_free_prom_memory(void)
+{
+
+}
+
+void __init device_tree_init(void)
+{
+	if (!fdt_check_header(&__appended_dtb)) {
+		fdt = &__appended_dtb;
+		pr_info("Using appended Device Tree.\n");
+	}
+	initial_boot_params = (void *)fdt;
+	unflatten_and_copy_device_tree();
+}
+
+static void __init prom_init_cmdline(void)
+{
+	int argc = fw_arg0;
+	char **argv = (char **) KSEG1ADDR(fw_arg1);
+	int i;
+
+	arcs_cmdline[0] = '\0';
+
+	for (i = 0; i < argc; i++) {
+		char *p = (char *) KSEG1ADDR(argv[i]);
+
+		if (CPHYSADDR(p) && *p) {
+			strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+		}
+	}
+	pr_info("Kernel command line: %s\n", arcs_cmdline);
+}
+
+void __init prom_init(void)
+{
+	uint32_t model;
+
+	/* uart0 */
+        setup_8250_early_printk_port(0xb8002000, 2, 0);
+
+	soc_info.sw_base = RTL838X_SW_BASE;
+
+	model = sw_r32(RTL838X_MODEL_NAME_INFO) >> 16;
+	if (model != 0x8328 && model != 0x8330 && model != 0x8332 &&
+	    model != 0x8380 && model != 0x8382)
+		model = sw_r32(RTL839X_MODEL_NAME_INFO) >> 16;
+
+	soc_info.id = model;
+
+	switch (model) {
+	case 0x8328:
+		soc_info.name = "RTL8328";
+		soc_info.family = RTL8328_FAMILY_ID;
+		break;
+	case 0x8332:
+		soc_info.name = "RTL8332";
+		soc_info.family = RTL8380_FAMILY_ID;
+		break;
+	case 0x8380:
+		soc_info.name = "RTL8380";
+		soc_info.family = RTL8380_FAMILY_ID;
+		break;
+	case 0x8382:
+		soc_info.name = "RTL8382";
+		soc_info.family = RTL8380_FAMILY_ID;
+		break;
+	case 0x8390:
+		soc_info.name = "RTL8390";
+		soc_info.family = RTL8390_FAMILY_ID;
+		break;
+	case 0x8391:
+		soc_info.name = "RTL8391";
+		soc_info.family = RTL8390_FAMILY_ID;
+		break;
+	case 0x8392:
+		soc_info.name = "RTL8392";
+		soc_info.family = RTL8390_FAMILY_ID;
+		break;
+	case 0x8393:
+		soc_info.name = "RTL8393";
+		soc_info.family = RTL8390_FAMILY_ID;
+		break;
+	default:
+		soc_info.name = "DEFAULT";
+		soc_info.family = 0;
+	}
+	pr_info("SoC Type: %s\n", get_system_type());
+	prom_init_cmdline();
+}