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[POWERPC] Add uartlite boot console driver for the zImage wrapper

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Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Grant Likely 2007-04-28 05:50:03 +10:00 committed by Paul Mackerras
parent 8c38fc2b74
commit 8b01653ab0
3 changed files with 48 additions and 5 deletions
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15
arch/ppc/boot/common/misc-common.c
View file

@ -57,7 +57,8 @@ unsigned char *ISA_io = NULL;
#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
extern unsigned long com_port;
extern int serial_tstc(unsigned long com_port);
@ -80,7 +81,8 @@ int tstc(void)
{
#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
if(keyb_present)
return (CRT_tstc() || serial_tstc(com_port));
else
@ -95,7 +97,8 @@ int getc(void)
while (1) {
#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
if (serial_tstc(com_port))
return (serial_getc(com_port));
#endif /* serial console */
@ -112,7 +115,8 @@ putc(const char c)
#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
serial_putc(com_port, c);
if ( c == '\n' )
serial_putc(com_port, '\r');
@ -161,7 +165,8 @@ void puts(const char *s)
while ( ( c = *s++ ) != '\0' ) {
#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
|| defined(CONFIG_SERIAL_MPSC_CONSOLE) \
|| defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
serial_putc(com_port, c);
if ( c == '\n' ) serial_putc(com_port, '\r');
#endif /* serial console */

1
arch/ppc/boot/simple/Makefile
View file

@ -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)

37
arch/ppc/boot/simple/uartlite_tty.c Normal file
View file

@ -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);
}