diff options
| author | Baruch Siach <baruch@tkos.co.il> | 2015-01-14 10:40:31 +0200 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2015-01-27 15:11:51 -0800 |
| commit | e23814da826283ee540f2c0837bba1937cd8f6b5 (patch) | |
| tree | 63191ca025fe9368622d4f643eb025f0f50b538a /arch/arm/include/debug | |
| parent | df8d742e9299ef6c0fdc3edf6f028f211f683a7b (diff) | |
ARM: digicolor: add low level debug support
Use the USART peripheral as UART for low level debug. Only the UA0 port is
currently supported.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/include/debug')
| -rw-r--r-- | arch/arm/include/debug/digicolor.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/include/debug/digicolor.S b/arch/arm/include/debug/digicolor.S new file mode 100644 index 000000000000..c9517150766a --- /dev/null +++ b/arch/arm/include/debug/digicolor.S @@ -0,0 +1,35 @@ +/* + * Debugging macro include header for Conexant Digicolor USART + * + * Copyright (C) 2014 Paradox Innovation Ltd. + * + * 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. + * +*/ + +#define UA0_STATUS 0x0742 +#define UA0_EMI_REC 0x0744 + +#define UA0_STATUS_TX_READY 0x40 + +#ifdef CONFIG_DEBUG_UART_PHYS + .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS + ldr \rv, =CONFIG_DEBUG_UART_VIRT + .endm +#endif + + .macro senduart,rd,rx + strb \rd, [\rx, #UA0_EMI_REC] + .endm + + .macro waituart,rd,rx + .endm + + .macro busyuart,rd,rx +1001: ldrb \rd, [\rx, #UA0_STATUS] + tst \rd, #UA0_STATUS_TX_READY + beq 1001b + .endm |