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-rw-r--r--arch/mips/lantiq/falcon/prom.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/mips/lantiq/falcon/prom.c b/arch/mips/lantiq/falcon/prom.c
new file mode 100644
index 0000000..c1d278f
--- /dev/null
+++ b/arch/mips/lantiq/falcon/prom.c
@@ -0,0 +1,87 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com>
+ * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.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;
+ }
+}