[PATCH v2 02/11] ARM: add very initial support for Canon DIGIC chips
Antony Pavlov
antonynpavlov at gmail.com
Mon Jul 28 14:15:21 PDT 2014
Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
---
arch/arm/Kconfig | 10 +++++++
arch/arm/Makefile | 1 +
arch/arm/dts/digic4.dtsi | 42 +++++++++++++++++++++++++++++
arch/arm/mach-digic/Kconfig | 8 ++++++
arch/arm/mach-digic/Makefile | 1 +
arch/arm/mach-digic/core.c | 25 +++++++++++++++++
arch/arm/mach-digic/include/mach/debug_ll.h | 40 +++++++++++++++++++++++++++
arch/arm/mach-digic/include/mach/digic4.h | 23 ++++++++++++++++
arch/arm/mach-digic/include/mach/uart.h | 28 +++++++++++++++++++
9 files changed, 178 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3af0197..ea0abcd 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -62,6 +62,15 @@ config ARCH_DAVINCI
select HAS_DEBUG_LL
select GPIOLIB
+config ARCH_DIGIC
+ bool "Canon DIGIC-based cameras"
+ select CPU_ARM946E
+ select HAS_DEBUG_LL
+ select CLOCKSOURCE_DIGIC
+ select GPIOLIB
+ help
+ Support for Canon's digital cameras that use the DIGIC4 chip.
+
config ARCH_EP93XX
bool "Cirrus Logic EP93xx"
select CPU_ARM920T
@@ -220,6 +229,7 @@ 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-digic/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 983f7f5..1b0d7fe 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -55,6 +55,7 @@ machine-$(CONFIG_ARCH_AT91) := at91
machine-$(CONFIG_ARCH_BCM2835) := bcm2835
machine-$(CONFIG_ARCH_CLPS711X) := clps711x
machine-$(CONFIG_ARCH_DAVINCI) := davinci
+machine-$(CONFIG_ARCH_DIGIC) := digic
machine-$(CONFIG_ARCH_EP93XX) := ep93xx
machine-$(CONFIG_ARCH_HIGHBANK) := highbank
machine-$(CONFIG_ARCH_IMX) := imx
diff --git a/arch/arm/dts/digic4.dtsi b/arch/arm/dts/digic4.dtsi
new file mode 100644
index 0000000..21b004d
--- /dev/null
+++ b/arch/arm/dts/digic4.dtsi
@@ -0,0 +1,42 @@
+/include/ "skeleton.dtsi"
+
+/ {
+ compatible = "canon,digic4";
+
+ timer0: timer at c0210000 {
+ compatible = "canon,digic-timer";
+ reg = <0xc0210000 0x1c>;
+ status = "disabled";
+ };
+
+ timer1: timer at c0210100 {
+ compatible = "canon,digic-timer";
+ reg = <0xc0210100 0x1c>;
+ status = "disabled";
+ };
+
+ timer2: timer at c0210200 {
+ compatible = "canon,digic-timer";
+ reg = <0xc0210200 0x1c>;
+ status = "disabled";
+ };
+
+ /*
+ * I don't know real max GPIO number but this page
+ * http://magiclantern.wikia.com/wiki/Register_Map#GPIO_Ports
+ * says about 93 pins on 5DMkIII.
+ * Assume that DIGIC4 has at least 96 pins.
+ * So resource size is 96 * 4 = 0x180.
+ */
+ gpio: gpio {
+ compatible = "canon,digic-gpio";
+ reg = <0xc0220000 0x180>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ };
+
+ uart: uart {
+ compatible = "canon,digic-uart";
+ reg = <0xc0800000 0x1c>;
+ };
+};
diff --git a/arch/arm/mach-digic/Kconfig b/arch/arm/mach-digic/Kconfig
new file mode 100644
index 0000000..49ce44a
--- /dev/null
+++ b/arch/arm/mach-digic/Kconfig
@@ -0,0 +1,8 @@
+if ARCH_DIGIC
+
+choice
+ prompt "camera type"
+
+endchoice
+
+endif
diff --git a/arch/arm/mach-digic/Makefile b/arch/arm/mach-digic/Makefile
new file mode 100644
index 0000000..820eb10
--- /dev/null
+++ b/arch/arm/mach-digic/Makefile
@@ -0,0 +1 @@
+obj-y += core.o
diff --git a/arch/arm/mach-digic/core.c b/arch/arm/mach-digic/core.c
new file mode 100644
index 0000000..b1caec0
--- /dev/null
+++ b/arch/arm/mach-digic/core.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2013 Antony Pavlov <antonynpavlov at gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <common.h>
+
+void __noreturn reset_cpu(unsigned long ignored)
+{
+ pr_err("%s: unimplemented\n", __func__);
+ hang();
+}
+EXPORT_SYMBOL(reset_cpu);
diff --git a/arch/arm/mach-digic/include/mach/debug_ll.h b/arch/arm/mach-digic/include/mach/debug_ll.h
new file mode 100644
index 0000000..721fd44
--- /dev/null
+++ b/arch/arm/mach-digic/include/mach/debug_ll.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2013, 2014 Antony Pavlov <antonynpavlov at gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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 __MACH_DEBUG_LL_H__
+#define __MACH_DEBUG_LL_H__
+
+#include <io.h>
+#include <mach/digic4.h>
+#include <mach/uart.h>
+
+#define DEBUG_LL_UART DIGIC4_UART
+
+/* Serial interface registers */
+#define DEBUG_LL_UART_TX (DEBUG_LL_UART + DIGIC_UART_TX)
+#define DEBUG_LL_UART_ST (DEBUG_LL_UART + DIGIC_UART_ST)
+
+static inline void PUTC_LL(char ch)
+{
+ while (!(readl(DEBUG_LL_UART_ST) & DIGIC_UART_ST_TX_RDY))
+ ; /* noop */
+
+ writel(0x06, DEBUG_LL_UART_ST);
+ writel(ch, DEBUG_LL_UART_TX);
+}
+
+#endif /* __MACH_DEBUG_LL_H__ */
diff --git a/arch/arm/mach-digic/include/mach/digic4.h b/arch/arm/mach-digic/include/mach/digic4.h
new file mode 100644
index 0000000..ffc7979
--- /dev/null
+++ b/arch/arm/mach-digic/include/mach/digic4.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2013 Antony Pavlov <antonynpavlov at gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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 __DIGIC4_H__
+#define __DIGIC4_H__
+
+#define DIGIC4_UART 0xc0800000
+
+#endif /* __DIGIC4_H__ */
diff --git a/arch/arm/mach-digic/include/mach/uart.h b/arch/arm/mach-digic/include/mach/uart.h
new file mode 100644
index 0000000..043f7cd
--- /dev/null
+++ b/arch/arm/mach-digic/include/mach/uart.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2013 Antony Pavlov <antonynpavlov at gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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 __DIGIC_UART_H__
+#define __DIGIC_UART_H__
+
+/* Serial interface registers offsets */
+#define DIGIC_UART_TX 0x0
+#define DIGIC_UART_RX 0x4
+#define DIGIC_UART_ST 0x14
+# define DIGIC_UART_ST_RX_RDY 1
+# define DIGIC_UART_ST_TX_RDY 2
+
+#endif /* __DIGIC_UART_H__ */
--
2.0.1
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