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76 lines
2.1 KiB
76 lines
2.1 KiB
/* |
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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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