1 files changed, 90 insertions, 0 deletions

diff --git a/arch/mips/lantiq/falcon/prom.c b/arch/mips/lantiq/falcon/prom.c
new file mode 100644
index 000000000..7b98def10
--- /dev/null
+++ b/arch/mips/lantiq/falcon/prom.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com>
+ * Copyright (C) 2012 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/kernel.h>
+#include <asm/cacheflush.h>
+#include <asm/traps.h>
+#include <asm/io.h>
+
+#include <lantiq_soc.h>
+
+#include "../prom.h"
+
+#define SOC_FALCON      "Falcon"
+#define SOC_FALCON_D    "Falcon-D"
+#define SOC_FALCON_V    "Falcon-V"
+#define SOC_FALCON_M    "Falcon-M"
+
+#define COMP_FALCON     "lantiq,falcon"
+
+#define PART_SHIFT      12
+#define PART_MASK       0x0FFFF000
+#define REV_SHIFT       28
+#define REV_MASK        0xF0000000
+#define SREV_SHIFT      22
+#define SREV_MASK       0x03C00000
+#define TYPE_SHIFT      26
+#define TYPE_MASK       0x3C000000
+
+/* reset, nmi and ejtag exception vectors */
+#define BOOT_REG_BASE   (KSEG1 | 0x1F200000)
+#define BOOT_RVEC       (BOOT_REG_BASE | 0x00)
+#define BOOT_NVEC       (BOOT_REG_BASE | 0x04)
+#define BOOT_EVEC       (BOOT_REG_BASE | 0x08)
+
+void __init ltq_soc_nmi_setup(void)
+{
+        extern void (*nmi_handler)(void);
+
+        ltq_w32((unsigned long)&nmi_handler, (void *)BOOT_NVEC);
+}
+
+void __init ltq_soc_ejtag_setup(void)
+{
+        extern void (*ejtag_debug_handler)(void);
+
+        ltq_w32((unsigned long)&ejtag_debug_handler, (void *)BOOT_EVEC);
+}
+
+void __init ltq_soc_detect(struct ltq_soc_info *i)
+{
+        u32 type;
+        i->partnum = (ltq_r32(FALCON_CHIPID) & PART_MASK) >> PART_SHIFT;
+        i->rev = (ltq_r32(FALCON_CHIPID) & REV_MASK) >> REV_SHIFT;
+        i->srev = ((ltq_r32(FALCON_CHIPCONF) & SREV_MASK) >> SREV_SHIFT);
+        i->compatible = COMP_FALCON;
+        i->type = SOC_TYPE_FALCON;
+        sprintf(i->rev_type, "%c%d%d", (i->srev & 0x4) ? ('B') : ('A'),
+                i->rev & 0x7, (i->srev & 0x3) + 1);
+
+        switch (i->partnum) {
+        case SOC_ID_FALCON:
+                type = (ltq_r32(FALCON_CHIPTYPE) & TYPE_MASK) >> TYPE_SHIFT;
+                switch (type) {
+                case 0:
+                        i->name = SOC_FALCON_D;
+                        break;
+                case 1:
+                        i->name = SOC_FALCON_V;
+                        break;
+                case 2:
+                        i->name = SOC_FALCON_M;
+                        break;
+                default:
+                        i->name = SOC_FALCON;
+                        break;
+                }
+                break;
+
+        default:
+                unreachable();
+                break;
+        }
+
+        board_nmi_handler_setup = ltq_soc_nmi_setup;
+        board_ejtag_handler_setup = ltq_soc_ejtag_setup;
+}