57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
|
|
* based on linux.git/drivers/tty/serial/ar933x_uart.c
|
|
*
|
|
* This file is part of barebox.
|
|
* 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 version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef __AR933X_DEBUG_LL__
|
|
#define __AR933X_DEBUG_LL__
|
|
|
|
#include <io.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
#include <mach/ar71xx_regs.h>
|
|
|
|
#define AR933X_UART_DATA_REG 0x00
|
|
#define AR933X_UART_DATA_TX_RX_MASK 0xff
|
|
#define AR933X_UART_DATA_TX_CSR BIT(9)
|
|
|
|
#define DEBUG_LL_UART_ADDR KSEG1ADDR(AR933X_UART_BASE)
|
|
|
|
static inline void ar933x_debug_ll_writel(u32 b, int offset)
|
|
{
|
|
cpu_writel(b, (u8 *)DEBUG_LL_UART_ADDR + offset);
|
|
}
|
|
|
|
static inline u32 ar933x_debug_ll_readl(int offset)
|
|
{
|
|
return cpu_readl((u8 *)DEBUG_LL_UART_ADDR + offset);
|
|
}
|
|
|
|
static inline void PUTC_LL(int ch)
|
|
{
|
|
u32 data;
|
|
|
|
/* wait transmitter ready */
|
|
data = ar933x_debug_ll_readl(AR933X_UART_DATA_REG);
|
|
while (!(data & AR933X_UART_DATA_TX_CSR))
|
|
data = ar933x_debug_ll_readl(AR933X_UART_DATA_REG);
|
|
|
|
data = (ch & AR933X_UART_DATA_TX_RX_MASK) | AR933X_UART_DATA_TX_CSR;
|
|
ar933x_debug_ll_writel(data, AR933X_UART_DATA_REG);
|
|
}
|
|
|
|
#endif /* __AR933X_DEBUG_LL__ */
|