diff options
| author | Grant Likely | 2007-04-27 21:50:03 +0200 |
|---|---|---|
| committer | Paul Mackerras | 2007-04-30 03:02:04 +0200 |
| commit | 8b01653ab01eebc781c5a375ff336d0837f30c4e (patch) | |
| tree | f86e552eb7e1490dec344c1088b97fa03e7238a7 /arch/ppc/boot/simple | |
| parent | [POWERPC] Stop using ppc_sys for Xilinx Virtex boards (diff) | |
| download | kernel-qcow2-linux-8b01653ab01eebc781c5a375ff336d0837f30c4e.tar.gz kernel-qcow2-linux-8b01653ab01eebc781c5a375ff336d0837f30c4e.tar.xz kernel-qcow2-linux-8b01653ab01eebc781c5a375ff336d0837f30c4e.zip | |
[POWERPC] Add uartlite boot console driver for the zImage wrapper
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc/boot/simple')
| -rw-r--r-- | arch/ppc/boot/simple/Makefile | 1 | ||||
| -rw-r--r-- | arch/ppc/boot/simple/uartlite_tty.c | 37 |
2 files changed, 38 insertions, 0 deletions
diff --git a/arch/ppc/boot/simple/Makefile b/arch/ppc/boot/simple/Makefile index bcfb6cde70c4..5b877792d14f 100644 --- a/arch/ppc/boot/simple/Makefile +++ b/arch/ppc/boot/simple/Makefile @@ -201,6 +201,7 @@ boot-$(CONFIG_8260) += m8260_tty.o endif boot-$(CONFIG_SERIAL_MPC52xx_CONSOLE) += mpc52xx_tty.o boot-$(CONFIG_SERIAL_MPSC_CONSOLE) += mv64x60_tty.o +boot-$(CONFIG_SERIAL_UARTLITE_CONSOLE) += uartlite_tty.o LIBS := $(common)/lib.a $(bootlib)/lib.a ifeq ($(CONFIG_PPC_PREP),y) diff --git a/arch/ppc/boot/simple/uartlite_tty.c b/arch/ppc/boot/simple/uartlite_tty.c new file mode 100644 index 000000000000..0eae1eab38d4 --- /dev/null +++ b/arch/ppc/boot/simple/uartlite_tty.c @@ -0,0 +1,37 @@ +/* + * Xilinx UARTLITE bootloader driver + * + * Copyright (c) 2007 Secret Lab Technologies Ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/types.h> +#include <asm/serial.h> +#include <asm/io.h> +#include <platforms/4xx/xparameters/xparameters.h> + +#define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR)) + +void +serial_putc(unsigned long com_port, unsigned char c) +{ + while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x08) != 0); /* spin */ + out_be32(UARTLITE_BASEADDR + 0x4, c); +} + +unsigned char +serial_getc(unsigned long com_port) +{ + while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) == 0); /* spin */ + return in_be32(UARTLITE_BASEADDR); +} + +int +serial_tstc(unsigned long com_port) +{ + return ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) != 0); +} |