mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-20 11:43:22 +00:00
53ea981c31
Redesign uartlite driver to in_be32 and out_be32 macros Fix missing header in io.h Signed-off-by: Michal Simek <monstr@monstr.eu> Acked-by: Grant Likely <grant.likely@secretlab.ca>
81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/*
|
|
* (C) Copyright 2008 Michal Simek <monstr@monstr.eu>
|
|
* Clean driver and add xilinx constant from header file
|
|
*
|
|
* (C) Copyright 2004 Atmark Techno, Inc.
|
|
* Yasushi SHOJI <yashi@atmark-techno.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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 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
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <asm/io.h>
|
|
|
|
#ifdef CONFIG_XILINX_UARTLITE
|
|
|
|
#define RX_FIFO_OFFSET 0 /* receive FIFO, read only */
|
|
#define TX_FIFO_OFFSET 4 /* transmit FIFO, write only */
|
|
#define STATUS_REG_OFFSET 8 /* status register, read only */
|
|
|
|
#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
|
|
#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
|
|
#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
|
|
|
|
#define UARTLITE_STATUS (CONFIG_SERIAL_BASE + STATUS_REG_OFFSET)
|
|
#define UARTLITE_TX_FIFO (CONFIG_SERIAL_BASE + TX_FIFO_OFFSET)
|
|
#define UARTLITE_RX_FIFO (CONFIG_SERIAL_BASE + RX_FIFO_OFFSET)
|
|
|
|
int serial_init(void)
|
|
{
|
|
/* FIXME: Nothing for now. We should initialize fifo, etc */
|
|
return 0;
|
|
}
|
|
|
|
void serial_setbrg(void)
|
|
{
|
|
/* FIXME: what's this for? */
|
|
}
|
|
|
|
void serial_putc(const char c)
|
|
{
|
|
if (c == '\n')
|
|
serial_putc('\r');
|
|
while (in_be32(UARTLITE_STATUS) & SR_TX_FIFO_FULL);
|
|
out_be32(UARTLITE_TX_FIFO, (unsigned char) (c & 0xff));
|
|
}
|
|
|
|
void serial_puts(const char * s)
|
|
{
|
|
while (*s) {
|
|
serial_putc(*s++);
|
|
}
|
|
}
|
|
|
|
int serial_getc(void)
|
|
{
|
|
while (!(in_be32(UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
|
|
return in_be32(UARTLITE_RX_FIFO) & 0xff;
|
|
}
|
|
|
|
int serial_tstc(void)
|
|
{
|
|
return (in_be32(UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
|
|
}
|
|
|
|
#endif /* CONFIG_MICROBLZE */
|