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| author | Antony Pavlov <antonynpavlov@gmail.com> | 2014-03-28 01:26:38 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-03-28 10:28:15 +0100 |
| commit | cf93dcd0dbb55a4fd45a0a02e167cc642248785d (patch) | |
| tree | 64f0f4239a72d852742d42b2cc201fcd6015e7af | |
| parent | c1ef9f84a3b5d8f07ec3d998dd7278cccdb64542 (diff) | |
| download | barebox-cf93dcd0dbb55a4fd45a0a02e167cc642248785d.tar.gz barebox-cf93dcd0dbb55a4fd45a0a02e167cc642248785d.tar.xz | |
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>
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/mach-ath79/include/mach/debug_ll.h | 56 |
2 files changed, 57 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 521af7ce6a..9a240b7822 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -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 diff --git a/arch/mips/mach-ath79/include/mach/debug_ll.h b/arch/mips/mach-ath79/include/mach/debug_ll.h new file mode 100644 index 0000000000..de4c00dfd1 --- /dev/null +++ b/arch/mips/mach-ath79/include/mach/debug_ll.h @@ -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__ */ |