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Commit e1ccbb65 authored by Hauke Mehrtens's avatar Hauke Mehrtens Committed by Ralf Baechle
Browse files

MIPS: BCM47XX: add EARLY_PRINTK_8250 support 



The BCM47xx SoCs have a 8250 serial compatible console at address
0x18000300 and an other at 0x18000400. On most devices 0x18000300 is
wired to some pins on the board, we should use that.
This is the smae for the AI (bcma) and the SB (ssb) bus, this is some
offset on the chip common core.

Signed-off-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Tested-by: default avatarAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: default avatarJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5889/
parent cb881f5e

arch/mips/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -120,6 +120,8 @@ config BCM47XX 
	select NO_EXCEPT_FILL

	select SYS_SUPPORTS_32BIT_KERNEL

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK

	select EARLY_PRINTK_8250 if EARLY_PRINTK

	help

	 Support for BCM47XX based boards

arch/mips/bcm47xx/prom.c

+9 −0
Original line number Diff line number Diff line
@@ -28,6 +28,8 @@ 
#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/spinlock.h>

#include <linux/ssb/ssb_driver_chipcommon.h>

#include <linux/ssb/ssb_regs.h>

#include <linux/smp.h>

#include <asm/bootinfo.h>

#include <bcm47xx.h>
@@ -94,9 +96,16 @@ static __init void prom_init_mem(void) 
	add_memory_region(0, mem, BOOT_MEM_RAM);

}



/*

 * This is the first serial on the chip common core, it is at this position

 * for sb (ssb) and ai (bcma) bus.

 */

#define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + SSB_CHIPCO_UART0_DATA)



void __init prom_init(void)

{

	prom_init_mem();

	setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);

}



void __init prom_free_prom_memory(void)