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authorJoshua Henderson <joshua.henderson@microchip.com>2016-01-13 18:15:39 -0700
committerRalf Baechle <ralf@linux-mips.org>2016-01-24 02:53:28 +0100
commit2572f00db8a68bb46001678c1c98ad8b70e04b31 (patch)
tree14a4ee6599049006cbeff57eff97185debbcffc5 /arch/mips/include
parent9b9c2cd44322ed9bc536eedf7d9a5e38e1eb4081 (diff)
downloadlinux-2572f00db8a68bb46001678c1c98ad8b70e04b31.tar.bz2
MIPS: Add support for PIC32MZDA platform
This adds support for the Microchip PIC32 MIPS microcontroller with the specific variant PIC32MZDA. PIC32MZDA is based on the MIPS m14KEc core and boots using device tree. This includes an early pin setup and early clock setup needed prior to device tree being initialized. In additon, an interface is provided to synchronize access to registers shared across several peripherals. Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/12097/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/mach-pic32/cpu-feature-overrides.h32
-rw-r--r--arch/mips/include/asm/mach-pic32/irq.h22
-rw-r--r--arch/mips/include/asm/mach-pic32/pic32.h44
-rw-r--r--arch/mips/include/asm/mach-pic32/spaces.h24
4 files changed, 122 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-pic32/cpu-feature-overrides.h b/arch/mips/include/asm/mach-pic32/cpu-feature-overrides.h
new file mode 100644
index 000000000000..468230834e2f
--- /dev/null
+++ b/arch/mips/include/asm/mach-pic32/cpu-feature-overrides.h
@@ -0,0 +1,32 @@
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#ifndef __ASM_MACH_PIC32_CPU_FEATURE_OVERRIDES_H
+#define __ASM_MACH_PIC32_CPU_FEATURE_OVERRIDES_H
+
+/*
+ * CPU feature overrides for PIC32 boards
+ */
+#ifdef CONFIG_CPU_MIPS32
+#define cpu_has_vint 1
+#define cpu_has_veic 0
+#define cpu_has_tlb 1
+#define cpu_has_4kex 1
+#define cpu_has_4k_cache 1
+#define cpu_has_fpu 0
+#define cpu_has_counter 1
+#define cpu_has_llsc 1
+#define cpu_has_nofpuex 0
+#define cpu_icache_snoops_remote_store 1
+#endif
+
+#ifdef CONFIG_CPU_MIPS64
+#error This platform does not support 64bit.
+#endif
+
+#endif /* __ASM_MACH_PIC32_CPU_FEATURE_OVERRIDES_H */
diff --git a/arch/mips/include/asm/mach-pic32/irq.h b/arch/mips/include/asm/mach-pic32/irq.h
new file mode 100644
index 000000000000..864330ce8838
--- /dev/null
+++ b/arch/mips/include/asm/mach-pic32/irq.h
@@ -0,0 +1,22 @@
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+#ifndef __ASM_MACH_PIC32_IRQ_H
+#define __ASM_MACH_PIC32_IRQ_H
+
+#define NR_IRQS 256
+#define MIPS_CPU_IRQ_BASE 0
+
+#include_next <irq.h>
+
+#endif /* __ASM_MACH_PIC32_IRQ_H */
diff --git a/arch/mips/include/asm/mach-pic32/pic32.h b/arch/mips/include/asm/mach-pic32/pic32.h
new file mode 100644
index 000000000000..ce52e918daae
--- /dev/null
+++ b/arch/mips/include/asm/mach-pic32/pic32.h
@@ -0,0 +1,44 @@
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+#ifndef _ASM_MACH_PIC32_H
+#define _ASM_MACH_PIC32_H
+
+#include <linux/io.h>
+
+/*
+ * PIC32 register offsets for SET/CLR/INV where supported.
+ */
+#define PIC32_CLR(_reg) ((_reg) + 0x04)
+#define PIC32_SET(_reg) ((_reg) + 0x08)
+#define PIC32_INV(_reg) ((_reg) + 0x0C)
+
+/*
+ * PIC32 Base Register Offsets
+ */
+#define PIC32_BASE_CONFIG 0x1f800000
+#define PIC32_BASE_OSC 0x1f801200
+#define PIC32_BASE_RESET 0x1f801240
+#define PIC32_BASE_PPS 0x1f801400
+#define PIC32_BASE_UART 0x1f822000
+#define PIC32_BASE_PORT 0x1f860000
+#define PIC32_BASE_DEVCFG2 0x1fc4ff44
+
+/*
+ * Register unlock sequence required for some register access.
+ */
+void pic32_syskey_unlock_debug(const char *fn, const ulong ln);
+#define pic32_syskey_unlock() \
+ pic32_syskey_unlock_debug(__func__, __LINE__)
+
+#endif /* _ASM_MACH_PIC32_H */
diff --git a/arch/mips/include/asm/mach-pic32/spaces.h b/arch/mips/include/asm/mach-pic32/spaces.h
new file mode 100644
index 000000000000..046a0a9aa8b3
--- /dev/null
+++ b/arch/mips/include/asm/mach-pic32/spaces.h
@@ -0,0 +1,24 @@
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+#ifndef _ASM_MACH_PIC32_SPACES_H
+#define _ASM_MACH_PIC32_SPACES_H
+
+#ifdef CONFIG_PIC32MZDA
+#define PHYS_OFFSET _AC(0x08000000, UL)
+#define UNCAC_BASE _AC(0xa8000000, UL)
+#endif
+
+#include <asm/mach-generic/spaces.h>
+
+#endif /* __ASM_MACH_PIC32_SPACES_H */