| /* |
| * 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 <johannes@sipsolutions.net> |
| * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com> |
| * |
| * 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 */ |