/*
* carl9170 firmware - used by the ar9170 wireless device
*
* UART debug interface functions.
*
* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <[email protected]>
* Copyright 2009-2011 Christian Lamparter <[email protected]>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "carl9170.h"
#include "uart.h"
#include "io.h"

#ifdef CONFIG_CARL9170FW_DEBUG_UART
void uart_putc(const char c)
{
set(AR9170_UART_REG_TX_HOLDING, c);

while (get(AR9170_UART_REG_LINE_STATUS) &
AR9170_UART_LINE_STS_TX_FIFO_ALMOST_EMPTY) {
/*
* wait until the byte has made it
*/
}
}

void uart_print_hex_dump(const void *buf, const int len)
{
unsigned int offset = 0;

uart_putc('H');
uart_putc('D');
uart_putc(':');

while (len > 0) {
uart_putc(*((uint8_t *) buf + offset));
offset++;
}
}

void uart_init(void)
{
unsigned int timeout = 0;

#ifdef CONFIG_CARL9170FW_UART_CLOCK_25M
set(AR9170_UART_REG_DIVISOR_LSB, 0xc);
#elif CONFIG_CARL9170FW_UART_CLOCK_40M
set(AR9170_UART_REG_DIVISOR_LSB, 0x14); /* 40 MHz */
set(AR9170_UART_REG_REMAINDER, 0xb38e);
#else
#error "Unsupported UART clock"
#endif /* CARL9170FW_UART_CLOCK_25M */

while (get(AR9170_UART_REG_LINE_STATUS) &
AR9170_UART_LINE_STS_TRANSMITTER_EMPTY) {
if (timeout++ >= 10000)
break;
}
}
#endif /* CONFIG_CARL9170FW_DEBUG_UART */