From 4c1aa10d0f4dc0b0fd8a2118b5d52cd893bb1e27 Mon Sep 17 00:00:00 2001 From: Antony Pavlov Date: Sun, 16 Mar 2014 17:48:13 +0400 Subject: ARM: initial support for TI DaVinci SoCs This commit adds minimal support for the DaVinci DM365 SoCs from Texas Instruments. Signed-off-by: Antony Pavlov Signed-off-by: Sascha Hauer --- arch/arm/Kconfig | 5 ++ arch/arm/Makefile | 1 + arch/arm/mach-davinci/Kconfig | 7 ++ arch/arm/mach-davinci/Makefile | 1 + arch/arm/mach-davinci/include/mach/hardware.h | 29 ++++++++ arch/arm/mach-davinci/include/mach/serial.h | 20 ++++++ arch/arm/mach-davinci/include/mach/time.h | 18 +++++ arch/arm/mach-davinci/time.c | 95 +++++++++++++++++++++++++++ 8 files changed, 176 insertions(+) create mode 100644 arch/arm/mach-davinci/Kconfig create mode 100644 arch/arm/mach-davinci/Makefile create mode 100644 arch/arm/mach-davinci/include/mach/hardware.h create mode 100644 arch/arm/mach-davinci/include/mach/serial.h create mode 100644 arch/arm/mach-davinci/include/mach/time.h create mode 100644 arch/arm/mach-davinci/time.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 21f90121cd..42ff01b5d1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -54,6 +54,10 @@ config ARCH_CLPS711X select GPIOLIB select MFD_SYSCON +config ARCH_DAVINCI + bool "TI Davinci" + select CPU_ARM926T + config ARCH_EP93XX bool "Cirrus Logic EP93xx" select CPU_ARM920T @@ -188,6 +192,7 @@ source arch/arm/cpu/Kconfig source arch/arm/mach-at91/Kconfig source arch/arm/mach-bcm2835/Kconfig source arch/arm/mach-clps711x/Kconfig +source arch/arm/mach-davinci/Kconfig source arch/arm/mach-ep93xx/Kconfig source arch/arm/mach-highbank/Kconfig source arch/arm/mach-imx/Kconfig diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 2bbba35a67..c1bd836d9f 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -54,6 +54,7 @@ AFLAGS += -include asm/unified.h -msoft-float $(AFLAGS_THUMB2) machine-$(CONFIG_ARCH_AT91) := at91 machine-$(CONFIG_ARCH_BCM2835) := bcm2835 machine-$(CONFIG_ARCH_CLPS711X) := clps711x +machine-$(CONFIG_ARCH_DAVINCI) := davinci machine-$(CONFIG_ARCH_EP93XX) := ep93xx machine-$(CONFIG_ARCH_HIGHBANK) := highbank machine-$(CONFIG_ARCH_IMX) := imx diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig new file mode 100644 index 0000000000..5677f8db9d --- /dev/null +++ b/arch/arm/mach-davinci/Kconfig @@ -0,0 +1,7 @@ +if ARCH_DAVINCI + +config ARCH_TEXT_BASE + hex + default 0x82000000 + +endif diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile new file mode 100644 index 0000000000..b96d4146f6 --- /dev/null +++ b/arch/arm/mach-davinci/Makefile @@ -0,0 +1 @@ +obj-y += time.o diff --git a/arch/arm/mach-davinci/include/mach/hardware.h b/arch/arm/mach-davinci/include/mach/hardware.h new file mode 100644 index 0000000000..ea9f481844 --- /dev/null +++ b/arch/arm/mach-davinci/include/mach/hardware.h @@ -0,0 +1,29 @@ +/* + * Hardware definitions common to all DaVinci family processors + * + * Author: Kevin Hilman, Deep Root Systems, LLC + * + * 2007 (c) Deep Root Systems, LLC. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ +#ifndef __ASM_ARCH_HARDWARE_H +#define __ASM_ARCH_HARDWARE_H + +#include + +/* + * Before you add anything to this file: + * + * This header is for defines common to ALL DaVinci family chips. + * Anything that is chip specific should go in .h, + * and the chip/board init code should then explicitly include + * .h + */ +/* + * I/O mapping + */ +#define IO_PHYS UL(0x01c00000) + +#endif /* __ASM_ARCH_HARDWARE_H */ diff --git a/arch/arm/mach-davinci/include/mach/serial.h b/arch/arm/mach-davinci/include/mach/serial.h new file mode 100644 index 0000000000..bc7449f3d7 --- /dev/null +++ b/arch/arm/mach-davinci/include/mach/serial.h @@ -0,0 +1,20 @@ +/* + * DaVinci serial device definitions + * + * Author: Kevin Hilman, MontaVista Software, Inc. + * + * 2007 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ +#ifndef __ASM_ARCH_SERIAL_H +#define __ASM_ARCH_SERIAL_H + +#include + +#define DAVINCI_UART0_BASE (IO_PHYS + 0x20000) +#define DAVINCI_UART1_BASE (IO_PHYS + 0x20400) +#define DAVINCI_UART2_BASE (IO_PHYS + 0x20800) + +#endif /* __ASM_ARCH_SERIAL_H */ diff --git a/arch/arm/mach-davinci/include/mach/time.h b/arch/arm/mach-davinci/include/mach/time.h new file mode 100644 index 0000000000..741e90c21f --- /dev/null +++ b/arch/arm/mach-davinci/include/mach/time.h @@ -0,0 +1,18 @@ +/* + * Local header file for DaVinci time code. + * + * Author: Kevin Hilman, MontaVista Software, Inc. + * + * 2007 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ +#ifndef __ARCH_ARM_MACH_DAVINCI_TIME_H +#define __ARCH_ARM_MACH_DAVINCI_TIME_H + +#include + +#define DAVINCI_WDOG_BASE (IO_PHYS + 0x21C00) + +#endif /* __ARCH_ARM_MACH_DAVINCI_TIME_H */ diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c new file mode 100644 index 0000000000..1e0071957e --- /dev/null +++ b/arch/arm/mach-davinci/time.c @@ -0,0 +1,95 @@ +/* + * DaVinci timer subsystem + * + * Author: Kevin Hilman, MontaVista Software, Inc. + * + * 2007 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ + +#include +#include + +#include + +/* Timer register offsets */ +#define PID12 0x0 +#define TIM12 0x10 +#define TIM34 0x14 +#define PRD12 0x18 +#define PRD34 0x1c +#define TCR 0x20 +#define TGCR 0x24 +#define WDTCR 0x28 + +/* Timer register bitfields */ +#define TCR_ENAMODE_DISABLE 0x0 +#define TCR_ENAMODE_ONESHOT 0x1 +#define TCR_ENAMODE_PERIODIC 0x2 +#define TCR_ENAMODE_MASK 0x3 + +#define TGCR_TIMMODE_SHIFT 2 +#define TGCR_TIMMODE_64BIT_GP 0x0 +#define TGCR_TIMMODE_32BIT_UNCHAINED 0x1 +#define TGCR_TIMMODE_64BIT_WDOG 0x2 +#define TGCR_TIMMODE_32BIT_CHAINED 0x3 + +#define TGCR_TIM12RS_SHIFT 0 +#define TGCR_TIM34RS_SHIFT 1 +#define TGCR_RESET 0x0 +#define TGCR_UNRESET 0x1 +#define TGCR_RESET_MASK 0x3 + +#define WDTCR_WDEN_SHIFT 14 +#define WDTCR_WDEN_DISABLE 0x0 +#define WDTCR_WDEN_ENABLE 0x1 +#define WDTCR_WDKEY_SHIFT 16 +#define WDTCR_WDKEY_SEQ0 0xa5c6 +#define WDTCR_WDKEY_SEQ1 0xda7e + +/* reset board using watchdog timer */ +void __noreturn reset_cpu(ulong addr) +{ + u32 tgcr, wdtcr; + void __iomem *base; + + base = IOMEM(DAVINCI_WDOG_BASE); + + /* disable, internal clock source */ + __raw_writel(0, base + TCR); + + /* reset timer, set mode to 64-bit watchdog, and unreset */ + tgcr = 0; + __raw_writel(tgcr, base + TGCR); + tgcr = TGCR_TIMMODE_64BIT_WDOG << TGCR_TIMMODE_SHIFT; + tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) | + (TGCR_UNRESET << TGCR_TIM34RS_SHIFT); + __raw_writel(tgcr, base + TGCR); + + /* clear counter and period regs */ + __raw_writel(0, base + TIM12); + __raw_writel(0, base + TIM34); + __raw_writel(0, base + PRD12); + __raw_writel(0, base + PRD34); + + /* put watchdog in pre-active state */ + wdtcr = __raw_readl(base + WDTCR); + wdtcr = (WDTCR_WDKEY_SEQ0 << WDTCR_WDKEY_SHIFT) | + (WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT); + __raw_writel(wdtcr, base + WDTCR); + + /* put watchdog in active state */ + wdtcr = (WDTCR_WDKEY_SEQ1 << WDTCR_WDKEY_SHIFT) | + (WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT); + __raw_writel(wdtcr, base + WDTCR); + + /* write an invalid value to the WDKEY field to trigger + * a watchdog reset */ + wdtcr = 0x00004000; + __raw_writel(wdtcr, base + WDTCR); + + unreachable(); +} +EXPORT_SYMBOL(reset_cpu); -- cgit v1.2.3