77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* carl9170 firmware - used by the ar9170 wireless device
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*
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* UART debug interface functions.
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*
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* Copyright (c) 2000-2005 ZyDAS Technology Corporation
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* Copyright (c) 2007-2009 Atheros Communications, Inc.
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "carl9170.h"
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#include "uart.h"
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#include "io.h"
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#ifdef CONFIG_CARL9170FW_DEBUG_UART
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void uart_putc(const char c)
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{
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set(AR9170_UART_REG_TX_HOLDING, c);
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while (get(AR9170_UART_REG_LINE_STATUS) &
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AR9170_UART_LINE_STS_TX_FIFO_ALMOST_EMPTY) {
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/*
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* wait until the byte has made it
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*/
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}
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}
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void uart_print_hex_dump(const void *buf, const int len)
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{
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unsigned int offset = 0;
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uart_putc('H');
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uart_putc('D');
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uart_putc(':');
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while (len > 0) {
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uart_putc(*((uint8_t *) buf + offset));
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offset++;
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}
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}
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void uart_init(void)
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{
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unsigned int timeout = 0;
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#ifdef CONFIG_CARL9170FW_UART_CLOCK_25M
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set(AR9170_UART_REG_DIVISOR_LSB, 0xc);
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#elif CONFIG_CARL9170FW_UART_CLOCK_40M
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set(AR9170_UART_REG_DIVISOR_LSB, 0x14); /* 40 MHz */
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set(AR9170_UART_REG_REMAINDER, 0xb38e);
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#else
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#error "Unsupported UART clock"
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#endif /* CARL9170FW_UART_CLOCK_25M */
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while (get(AR9170_UART_REG_LINE_STATUS) &
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AR9170_UART_LINE_STS_TRANSMITTER_EMPTY) {
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if (timeout++ >= 10000)
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break;
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}
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}
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#endif /* CONFIG_CARL9170FW_DEBUG_UART */
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