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[POWERPC] Virtex: Add uartlite bootwrapper driver 

Allows the bootwrapper to use the uartlite device for console output.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
This commit is contained in:
Grant Likely 2007-10-02 12:15:13 +10:00 committed by Josh Boyer
parent 340ffd267c
commit 7ddc5f978b
4 changed files with 68 additions and 1 deletions
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2
arch/powerpc/boot/Makefile
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@ -46,7 +46,7 @@ src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
ns16550.c serial.c simple_alloc.c div64.S util.S \
gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
cpm-serial.c stdlib.c mpc52xx-psc.c planetcore.c
cpm-serial.c stdlib.c mpc52xx-psc.c planetcore.c uartlite.c
src-plat := of.c cuboot-52xx.c cuboot-83xx.c cuboot-85xx.c holly.c \
cuboot-ebony.c treeboot-ebony.c prpmc2800.c \
ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-8xx.c \

1
arch/powerpc/boot/ops.h
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@ -85,6 +85,7 @@ int ns16550_console_init(void *devp, struct serial_console_data *scdp);
int mpsc_console_init(void *devp, struct serial_console_data *scdp);
int cpm_console_init(void *devp, struct serial_console_data *scdp);
int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp);
int uartlite_console_init(void *devp, struct serial_console_data *scdp);
void *simple_alloc_init(char *base, unsigned long heap_size,
unsigned long granularity, unsigned long max_allocs);
extern void flush_cache(void *, unsigned long);

2
arch/powerpc/boot/serial.c
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@ -128,6 +128,8 @@ int serial_console_init(void)
rc = cpm_console_init(devp, &serial_cd);
else if (dt_is_compatible(devp, "mpc5200-psc-uart"))
rc = mpc5200_psc_console_init(devp, &serial_cd);
else if (dt_is_compatible(devp, "xilinx,uartlite"))
rc = uartlite_console_init(devp, &serial_cd);
/* Add other serial console driver calls here */

64
arch/powerpc/boot/uartlite.c Normal file
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@ -0,0 +1,64 @@
/*
* Xilinx UARTLITE bootloader driver
*
* Copyright (C) 2007 Secret Lab Technologies Ltd.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "string.h"
#include "stdio.h"
#include "io.h"
#include "ops.h"
static void * reg_base;
static int uartlite_open(void)
{
/* Clear the RX FIFO */
out_be32(reg_base + 0x0C, 0x2);
return 0;
}
static void uartlite_putc(unsigned char c)
{
while ((in_be32(reg_base + 0x8) & 0x08) != 0); /* spin */
out_be32(reg_base + 0x4, c);
}
static unsigned char uartlite_getc(void)
{
while ((in_be32(reg_base + 0x8) & 0x01) == 0); /* spin */
return in_be32(reg_base);
}
static u8 uartlite_tstc(void)
{
return ((in_be32(reg_base + 0x8) & 0x01) != 0);
}
int uartlite_console_init(void *devp, struct serial_console_data *scdp)
{
int n;
unsigned long reg_phys;
n = getprop(devp, "virtual-reg", &reg_base, sizeof(reg_base));
if (n != sizeof(reg_base)) {
if (!dt_xlate_reg(devp, 0, &reg_phys, NULL))
return -1;
reg_base = (void *)reg_phys;
}
scdp->open = uartlite_open;
scdp->putc = uartlite_putc;
scdp->getc = uartlite_getc;
scdp->tstc = uartlite_tstc;
scdp->close = NULL;
return 0;
}