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/*
* (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((u32 *) UARTLITE_STATUS) & SR_TX_FIFO_FULL);
out_be32((u32 *) 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((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
return in_be32((u32 *) UARTLITE_RX_FIFO) & 0xff;
}
int serial_tstc(void)
{
return (in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
}
#endif /* CONFIG_MICROBLZE */
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