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| author | Antony Pavlov <antonynpavlov@gmail.com> | 2014-04-02 11:41:31 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-04-03 07:55:16 +0200 |
| commit | 93f1811d8be37fe9fc6d40ce2be6955ae842438c (patch) | |
| tree | aa952bda54d4e0d837f2490c0e3529684c835c84 /arch/mips | |
| parent | b51cba9c9a2dd55a35e911178f0900a90122ad93 (diff) | |
| download | barebox-93f1811d8be37fe9fc6d40ce2be6955ae842438c.tar.gz barebox-93f1811d8be37fe9fc6d40ce2be6955ae842438c.tar.xz | |
MIPS: qemu-malta: add CBUS UART support
This patch adds CBUS UART dts support;
also it adds the necessary macros for DEBUG_LL.
qemu-malta supports three serial interfaces:
* two ports are provided by the FDC37M817
Super I/O; this chip is connected via LPC bus
to Intel 82371EB (PIIX4E) South Bridge;
* the third serial port is provided by
the discrete TI 16C550C (CBUS UART);
this chip is connected via CBUS directly
to the board's GT64120 North Bridge.
See Malta User's Manual (MD00048) for details.
CBUS UART Instructions for use:
1. Enable CONFIG_CONSOLE_ACTIVATE_ALL in .config
(or disable uart0 in dts) and compile barebox;
2. run qemu:
qemu-system-mips -nographic -nodefaults \
-monitor null -M malta -m 256 \
-serial null -serial null -serial stdio \
-bios barebox-flash-image
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/dts/qemu-malta.dts | 8 | ||||
| -rw-r--r-- | arch/mips/mach-malta/include/mach/hardware.h | 3 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/mips/dts/qemu-malta.dts b/arch/mips/dts/qemu-malta.dts index b6b69c4955..67fe591f1f 100644 --- a/arch/mips/dts/qemu-malta.dts +++ b/arch/mips/dts/qemu-malta.dts @@ -25,6 +25,14 @@ clock-frequency = <1843200>; }; + uart2: serial@bf000900 { + compatible = "ns16550a"; + reg = <0xbf000900 0x40>; + reg-shift = <3>; + /* no matter for emulated port */ + clock-frequency = <1843200>; + }; + nor0: flash@be000000 { #address-cells = <1>; #size-cells = <1>; diff --git a/arch/mips/mach-malta/include/mach/hardware.h b/arch/mips/mach-malta/include/mach/hardware.h index 9345a67593..ba28cb86de 100644 --- a/arch/mips/mach-malta/include/mach/hardware.h +++ b/arch/mips/mach-malta/include/mach/hardware.h @@ -20,6 +20,9 @@ #define MALTA_PIIX4_UART0 0xb80003f8 +#define MALTA_CBUS_UART 0xbf000900 +#define MALTA_CBUS_UART_SHIFT 3 + /* * Reset register. */ |