mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
10ec0f8a74
- arm_dcc_dev is already initialized. - Remove unused rc variable Warning log: arm_dcc.c: In function 'drv_arm_dcc_init': arm_dcc.c:145:6: warning: unused variable 'rc' [-Wunused-variable] Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Marek Vasut <marex@denx.de>
159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
/*
|
|
* Copyright (C) 2004-2007 ARM Limited.
|
|
* Copyright (C) 2008 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* As a special exception, if other files instantiate templates or use macros
|
|
* or inline functions from this file, or you compile this file and link it
|
|
* with other works to produce a work based on this file, this file does not
|
|
* by itself cause the resulting work to be covered by the GNU General Public
|
|
* License. However the source code for this file must still be made available
|
|
* in accordance with section (3) of the GNU General Public License.
|
|
|
|
* This exception does not invalidate any other reasons why a work based on
|
|
* this file might be covered by the GNU General Public License.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <stdio_dev.h>
|
|
|
|
#if defined(CONFIG_CPU_V6)
|
|
/*
|
|
* ARMV6
|
|
*/
|
|
#define DCC_RBIT (1 << 30)
|
|
#define DCC_WBIT (1 << 29)
|
|
|
|
#define write_dcc(x) \
|
|
__asm__ volatile ("mcr p14, 0, %0, c0, c5, 0\n" : : "r" (x))
|
|
|
|
#define read_dcc(x) \
|
|
__asm__ volatile ("mrc p14, 0, %0, c0, c5, 0\n" : "=r" (x))
|
|
|
|
#define status_dcc(x) \
|
|
__asm__ volatile ("mrc p14, 0, %0, c0, c1, 0\n" : "=r" (x))
|
|
|
|
#elif defined(CONFIG_CPU_XSCALE)
|
|
/*
|
|
* XSCALE
|
|
*/
|
|
#define DCC_RBIT (1 << 31)
|
|
#define DCC_WBIT (1 << 28)
|
|
|
|
#define write_dcc(x) \
|
|
__asm__ volatile ("mcr p14, 0, %0, c8, c0, 0\n" : : "r" (x))
|
|
|
|
#define read_dcc(x) \
|
|
__asm__ volatile ("mrc p14, 0, %0, c9, c0, 0\n" : "=r" (x))
|
|
|
|
#define status_dcc(x) \
|
|
__asm__ volatile ("mrc p14, 0, %0, c14, c0, 0\n" : "=r" (x))
|
|
|
|
#else
|
|
#define DCC_RBIT (1 << 0)
|
|
#define DCC_WBIT (1 << 1)
|
|
|
|
#define write_dcc(x) \
|
|
__asm__ volatile ("mcr p14, 0, %0, c1, c0, 0\n" : : "r" (x))
|
|
|
|
#define read_dcc(x) \
|
|
__asm__ volatile ("mrc p14, 0, %0, c1, c0, 0\n" : "=r" (x))
|
|
|
|
#define status_dcc(x) \
|
|
__asm__ volatile ("mrc p14, 0, %0, c0, c0, 0\n" : "=r" (x))
|
|
|
|
#endif
|
|
|
|
#define can_read_dcc(x) do { \
|
|
status_dcc(x); \
|
|
x &= DCC_RBIT; \
|
|
} while (0);
|
|
|
|
#define can_write_dcc(x) do { \
|
|
status_dcc(x); \
|
|
x &= DCC_WBIT; \
|
|
x = (x == 0); \
|
|
} while (0);
|
|
|
|
#define TIMEOUT_COUNT 0x4000000
|
|
|
|
int arm_dcc_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int arm_dcc_getc(void)
|
|
{
|
|
int ch;
|
|
register unsigned int reg;
|
|
|
|
do {
|
|
can_read_dcc(reg);
|
|
} while (!reg);
|
|
read_dcc(ch);
|
|
|
|
return ch;
|
|
}
|
|
|
|
void arm_dcc_putc(char ch)
|
|
{
|
|
register unsigned int reg;
|
|
unsigned int timeout_count = TIMEOUT_COUNT;
|
|
|
|
while (--timeout_count) {
|
|
can_write_dcc(reg);
|
|
if (reg)
|
|
break;
|
|
}
|
|
if (timeout_count == 0)
|
|
return;
|
|
else
|
|
write_dcc(ch);
|
|
}
|
|
|
|
void arm_dcc_puts(const char *s)
|
|
{
|
|
while (*s)
|
|
arm_dcc_putc(*s++);
|
|
}
|
|
|
|
int arm_dcc_tstc(void)
|
|
{
|
|
register unsigned int reg;
|
|
|
|
can_read_dcc(reg);
|
|
|
|
return reg;
|
|
}
|
|
|
|
static struct stdio_dev arm_dcc_dev;
|
|
|
|
int drv_arm_dcc_init(void)
|
|
{
|
|
strcpy(arm_dcc_dev.name, "dcc");
|
|
arm_dcc_dev.ext = 0; /* No extensions */
|
|
arm_dcc_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT;
|
|
arm_dcc_dev.tstc = arm_dcc_tstc; /* 'tstc' function */
|
|
arm_dcc_dev.getc = arm_dcc_getc; /* 'getc' function */
|
|
arm_dcc_dev.putc = arm_dcc_putc; /* 'putc' function */
|
|
arm_dcc_dev.puts = arm_dcc_puts; /* 'puts' function */
|
|
|
|
return stdio_register(&arm_dcc_dev);
|
|
}
|
|
|
|
__weak struct serial_device *default_serial_console(void)
|
|
{
|
|
return NULL;
|
|
}
|