Commit 8402a158 authored by Manuel Lauss's avatar Manuel Lauss Committed by Ralf Baechle
Browse files

MIPS: Alchemy: prom_putchar is board dependent 



This patch replaces the general alchemy prom_putchar() implementation
in favor of board-specific versions:  The UART where the output of
prom_putchar is directed to really depends on the board, the current
implementation hardcodes this on a per-SoC basis which is just wrong.

So a generic uart tx function is provided in the alchemy headers,
and the boards can provide their own prom_putchar with custom
destination uart, and all in-kernel alchemy boards support
early printk.

Signed-off-by: default avatarManuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 963accbc

arch/mips/alchemy/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -20,12 +20,14 @@ config MIPS_MTX1 
	select HW_HAS_PCI

	select SOC_AU1500

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_BOSPORUS

	bool "Alchemy Bosporus board"

	select SOC_AU1500

	select DMA_NONCOHERENT

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_DB1000

	bool "Alchemy DB1000 board"
@@ -33,12 +35,14 @@ config MIPS_DB1000 
	select DMA_NONCOHERENT

	select HW_HAS_PCI

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_DB1100

	bool "Alchemy DB1100 board"

	select SOC_AU1100

	select DMA_NONCOHERENT

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_DB1200

	bool "Alchemy DB1200 board"
@@ -46,6 +50,7 @@ config MIPS_DB1200 
	select DMA_COHERENT

	select MIPS_DISABLE_OBSOLETE_IDE

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_DB1500

	bool "Alchemy DB1500 board"
@@ -55,6 +60,7 @@ config MIPS_DB1500 
	select MIPS_DISABLE_OBSOLETE_IDE

	select SYS_SUPPORTS_BIG_ENDIAN

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_DB1550

	bool "Alchemy DB1550 board"
@@ -63,12 +69,14 @@ config MIPS_DB1550 
	select DMA_NONCOHERENT

	select MIPS_DISABLE_OBSOLETE_IDE

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_MIRAGE

	bool "Alchemy Mirage board"

	select DMA_NONCOHERENT

	select SOC_AU1500

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_PB1000

	bool "Alchemy PB1000 board"
@@ -77,6 +85,7 @@ config MIPS_PB1000 
	select HW_HAS_PCI

	select SWAP_IO_SPACE

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_PB1100

	bool "Alchemy PB1100 board"
@@ -85,6 +94,7 @@ config MIPS_PB1100 
	select HW_HAS_PCI

	select SWAP_IO_SPACE

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_PB1200

	bool "Alchemy PB1200 board"
@@ -92,6 +102,7 @@ config MIPS_PB1200 
	select DMA_NONCOHERENT

	select MIPS_DISABLE_OBSOLETE_IDE

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_PB1500

	bool "Alchemy PB1500 board"
@@ -99,6 +110,7 @@ config MIPS_PB1500 
	select DMA_NONCOHERENT

	select HW_HAS_PCI

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_PB1550

	bool "Alchemy PB1550 board"
@@ -107,12 +119,14 @@ config MIPS_PB1550 
	select HW_HAS_PCI

	select MIPS_DISABLE_OBSOLETE_IDE

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



config MIPS_XXS1500

	bool "MyCable XXS1500 board"

	select DMA_NONCOHERENT

	select SOC_AU1500

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select SYS_HAS_EARLY_PRINTK



endchoice

arch/mips/alchemy/common/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
# Makefile for the Alchemy Au1xx0 CPUs, generic files.

#



obj-y += prom.o irq.o puts.o time.o reset.o \

obj-y += prom.o irq.o time.o reset.o \

	clocks.o platform.o power.o setup.o \

	sleeper.o dma.o dbdma.o

arch/mips/alchemy/common/puts.c

deleted100644 → 0
+0 −68
Original line number Diff line number Diff line 
/*

 *

 * BRIEF MODULE DESCRIPTION

 *	Low level UART routines to directly access Alchemy UART.

 *

 * Copyright 2001, 2008 MontaVista Software Inc.

 * Author: MontaVista Software, Inc. <source@mvista.com>

 *

 *  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.

 *

 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED

 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF

 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN

 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,

 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF

 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT

 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 *  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.,

 *  675 Mass Ave, Cambridge, MA 02139, USA.

 */



#include <asm/mach-au1x00/au1000.h>



#define SERIAL_BASE   UART_BASE

#define SER_CMD       0x7

#define SER_DATA      0x1

#define TX_BUSY       0x20



#define TIMEOUT       0xffffff

#define SLOW_DOWN



static volatile unsigned long * const com1 = (unsigned long *)SERIAL_BASE;



#ifdef SLOW_DOWN

static inline void slow_down(void)

{

	int k;



	for (k = 0; k < 10000; k++);

}

#else

#define slow_down()

#endif



void

prom_putchar(const unsigned char c)

{

	unsigned char ch;

	int i = 0;



	do {

		ch = com1[SER_CMD];

		slow_down();

		i++;

		if (i > TIMEOUT)

			break;

	} while (0 == (ch & TX_BUSY));



	com1[SER_DATA] = c;

}

arch/mips/alchemy/devboards/prom.c

+5 −0
Original line number Diff line number Diff line
@@ -60,3 +60,8 @@ void __init prom_init(void) 
		strict_strtoul(memsize_str, 0, &memsize);

	add_memory_region(0, memsize, BOOT_MEM_RAM);

}



void prom_putchar(unsigned char c)

{

    alchemy_uart_putchar(UART0_PHYS_ADDR, c);

}

arch/mips/alchemy/mtx-1/init.c

+6 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/init.h>



#include <asm/bootinfo.h>

#include <asm/mach-au1x00/au1000.h>



#include <prom.h>
@@ -58,3 +59,8 @@ void __init prom_init(void) 
		strict_strtoul(memsize_str, 0, &memsize);

	add_memory_region(0, memsize, BOOT_MEM_RAM);

}



void prom_putchar(unsigned char c)

{

	alchemy_uart_putchar(UART0_PHYS_ADDR, c);

}

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