From 4ae04acb81256719a71125c0f0280e2a3ad68e25 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Mon, 8 Feb 2010 11:02:54 +0000 Subject: [PATCH] ARM: mach-shmobile: early console support using earlyprintk Add support for early console to the SH-Mobile boards. Simply perform an early platform probe for "earlyprintk" to trigger the early serial console code in sh-sci.c. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- arch/arm/configs/ap4evb_defconfig | 2 +- arch/arm/configs/g3evm_defconfig | 2 +- arch/arm/configs/g4evm_defconfig | 2 +- arch/arm/mach-shmobile/Makefile | 2 +- arch/arm/mach-shmobile/board-ap4evb.c | 3 ++- arch/arm/mach-shmobile/board-g3evm.c | 3 ++- arch/arm/mach-shmobile/board-g4evm.c | 3 ++- arch/arm/mach-shmobile/console.c | 31 ++++++++++++++++++++++++++++ arch/arm/mach-shmobile/include/mach/common.h | 1 + 9 files changed, 42 insertions(+), 7 deletions(-) create mode 100644 arch/arm/mach-shmobile/console.c diff --git a/arch/arm/configs/ap4evb_defconfig b/arch/arm/configs/ap4evb_defconfig index 261913d05b4a..e14229be7676 100644 --- a/arch/arm/configs/ap4evb_defconfig +++ b/arch/arm/configs/ap4evb_defconfig @@ -322,7 +322,7 @@ CONFIG_ALIGNMENT_TRAP=y # CONFIG_ZBOOT_ROM_TEXT=0x0 CONFIG_ZBOOT_ROM_BSS=0x0 -CONFIG_CMDLINE="console=ttySC0,115200" +CONFIG_CMDLINE="console=ttySC0,115200 earlyprintk=sh-sci.0,115200" # CONFIG_XIP_KERNEL is not set CONFIG_KEXEC=y CONFIG_ATAGS_PROC=y diff --git a/arch/arm/configs/g3evm_defconfig b/arch/arm/configs/g3evm_defconfig index d323ff7efa25..3c19031961db 100644 --- a/arch/arm/configs/g3evm_defconfig +++ b/arch/arm/configs/g3evm_defconfig @@ -317,7 +317,7 @@ CONFIG_ALIGNMENT_TRAP=y # CONFIG_ZBOOT_ROM_TEXT=0x0 CONFIG_ZBOOT_ROM_BSS=0x0 -CONFIG_CMDLINE="console=ttySC1,115200" +CONFIG_CMDLINE="console=ttySC1,115200 earlyprintk=sh-sci.1,115200" # CONFIG_XIP_KERNEL is not set CONFIG_KEXEC=y CONFIG_ATAGS_PROC=y diff --git a/arch/arm/configs/g4evm_defconfig b/arch/arm/configs/g4evm_defconfig index ce8e05fe1a10..8ee79a537134 100644 --- a/arch/arm/configs/g4evm_defconfig +++ b/arch/arm/configs/g4evm_defconfig @@ -322,7 +322,7 @@ CONFIG_ALIGNMENT_TRAP=y # CONFIG_ZBOOT_ROM_TEXT=0x0 CONFIG_ZBOOT_ROM_BSS=0x0 -CONFIG_CMDLINE="console=ttySC4,115200" +CONFIG_CMDLINE="console=ttySC4,115200 earlyprintk=sh-sci.4,115200" # CONFIG_XIP_KERNEL is not set CONFIG_KEXEC=y CONFIG_ATAGS_PROC=y diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index 88893dbf7107..800e7dd9e9d1 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -3,7 +3,7 @@ # # Common objects -obj-y := timer.o +obj-y := timer.o console.o # CPU objects obj-$(CONFIG_ARCH_SH7367) += setup-sh7367.o clock-sh7367.o diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c index a8d815c96232..94b545b3fe82 100644 --- a/arch/arm/mach-shmobile/board-ap4evb.c +++ b/arch/arm/mach-shmobile/board-ap4evb.c @@ -105,9 +105,10 @@ static void __init ap4evb_map_io(void) { iotable_init(ap4evb_io_desc, ARRAY_SIZE(ap4evb_io_desc)); - /* setup early devices and clocks here as well */ + /* setup early devices, clocks and console here as well */ sh7372_add_early_devices(); sh7367_clock_init(); /* use g3 clocks for now */ + shmobile_setup_console(); } static void __init ap4evb_init(void) diff --git a/arch/arm/mach-shmobile/board-g3evm.c b/arch/arm/mach-shmobile/board-g3evm.c index b4b202718e4d..eba2311beba2 100644 --- a/arch/arm/mach-shmobile/board-g3evm.c +++ b/arch/arm/mach-shmobile/board-g3evm.c @@ -105,9 +105,10 @@ static void __init g3evm_map_io(void) { iotable_init(g3evm_io_desc, ARRAY_SIZE(g3evm_io_desc)); - /* setup early devices and clocks here as well */ + /* setup early devices, clocks and console here as well */ sh7367_add_early_devices(); sh7367_clock_init(); + shmobile_setup_console(); } static void __init g3evm_init(void) diff --git a/arch/arm/mach-shmobile/board-g4evm.c b/arch/arm/mach-shmobile/board-g4evm.c index 0d2948f17766..0ddde038588e 100644 --- a/arch/arm/mach-shmobile/board-g4evm.c +++ b/arch/arm/mach-shmobile/board-g4evm.c @@ -105,9 +105,10 @@ static void __init g4evm_map_io(void) { iotable_init(g4evm_io_desc, ARRAY_SIZE(g4evm_io_desc)); - /* setup early devices and clocks here as well */ + /* setup early devices, clocks and console here as well */ sh7377_add_early_devices(); sh7367_clock_init(); /* use g3 clocks for now */ + shmobile_setup_console(); } static void __init g4evm_init(void) diff --git a/arch/arm/mach-shmobile/console.c b/arch/arm/mach-shmobile/console.c new file mode 100644 index 000000000000..9411a5bf4fd6 --- /dev/null +++ b/arch/arm/mach-shmobile/console.c @@ -0,0 +1,31 @@ +/* + * SH-Mobile Console + * + * Copyright (C) 2010 Magnus Damm + * + * 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; version 2 of the License. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include +#include +#include +#include +#include + +void __init shmobile_setup_console(void) +{ + parse_early_param(); + + /* Let earlyprintk output early console messages */ + early_platform_driver_probe("earlyprintk", 1, 1); +} diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h index a12eb4d75f63..f5986ea561f3 100644 --- a/arch/arm/mach-shmobile/include/mach/common.h +++ b/arch/arm/mach-shmobile/include/mach/common.h @@ -2,6 +2,7 @@ #define __ARCH_MACH_COMMON_H extern struct sys_timer shmobile_timer; +extern void shmobile_setup_console(void); extern void sh7367_init_irq(void); extern void sh7367_add_early_devices(void); -- 2.11.0