From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH v2 02/10] ARM: initial support for TI DaVinci SoCs
Date: Sun, 16 Mar 2014 17:48:13 +0400 [thread overview]
Message-ID: <1394977701-5889-3-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1394977701-5889-1-git-send-email-antonynpavlov@gmail.com>
This commit adds minimal support for the DaVinci DM365 SoCs
from Texas Instruments.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
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(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 21f9012..42ff01b 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 2bbba35..c1bd836 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 0000000..5677f8d
--- /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 0000000..b96d414
--- /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 0000000..ea9f481
--- /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 <asm/memory.h>
+
+/*
+ * 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 <chipname>.h,
+ * and the chip/board init code should then explicitly include
+ * <chipname>.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 0000000..bc7449f
--- /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. <source@mvista.com>
+ *
+ * 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 <mach/hardware.h>
+
+#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 0000000..741e90c
--- /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. <source@mvista.com>
+ *
+ * 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 <mach/hardware.h>
+
+#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 0000000..1e00719
--- /dev/null
+++ b/arch/arm/mach-davinci/time.c
@@ -0,0 +1,95 @@
+/*
+ * DaVinci timer subsystem
+ *
+ * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
+ *
+ * 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 <common.h>
+#include <io.h>
+
+#include <mach/time.h>
+
+/* 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);
--
1.9.0
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next prev parent reply other threads:[~2014-03-16 13:49 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-16 13:48 [PATCH v2 00/10] ARM: initial support for TI DaVinci SoCs and virt2real board Antony Pavlov
2014-03-16 13:48 ` [PATCH v2 01/10] import _AC and UL macros from linux kernel Antony Pavlov
2014-03-16 13:48 ` Antony Pavlov [this message]
2014-03-16 13:48 ` [PATCH v2 03/10] ARM: davinci: add DEBUG_LL support Antony Pavlov
2014-03-16 13:48 ` [PATCH v2 04/10] ARM: davinci: add clocksource Antony Pavlov
2014-03-16 13:48 ` [PATCH v2 05/10] gpio: add driver for TI DaVinci SoCs Antony Pavlov
2014-03-16 13:48 ` [PATCH v2 06/10] ARM: dts: Add TI TMS320DM365 devicetree file Antony Pavlov
2014-03-18 16:54 ` Sascha Hauer
2014-03-16 13:48 ` [PATCH v2 07/10] ARM: davinci: add documentation Antony Pavlov
2014-03-16 13:48 ` [PATCH v2 08/10] ARM: davinci: add virt2real board support Antony Pavlov
2014-03-18 16:56 ` Sascha Hauer
2014-03-16 13:48 ` [PATCH v2 09/10] ARM: virt2real: add documentation Antony Pavlov
2014-03-16 13:48 ` [PATCH v2 10/10] ARM: davinci: add virt2real_defconfig Antony Pavlov
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