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MIPS: ath79: add DEBUG_LL support for Atheros AR933x 

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Antony Pavlov 2014-03-28 01:26:38 +04:00 committed by Sascha Hauer
parent c1ef9f84a3
commit cf93dcd0db
2 changed files with 57 additions and 0 deletions
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1
arch/mips/Kconfig
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@ -60,6 +60,7 @@ config MACH_MIPS_ATH79
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select CSRC_R4K_LIB
select HAS_DEBUG_LL
select HAVE_CLK
select COMMON_CLK
select COMMON_CLK_OF_PROVIDER

56
arch/mips/mach-ath79/include/mach/debug_ll.h Normal file
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@ -0,0 +1,56 @@
/*
* 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__ */