28 lines
733 B
ArmAsm
28 lines
733 B
ArmAsm
|
/*
|
||
|
|
* Copyright (c) 2011 Picochip Ltd., Jamie Iles
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
|
||
|
|
* accesses to the 8250.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/serial_reg.h>
|
||
|
|
|
||
|
|
.macro senduart,rd,rx
|
||
|
|
str \rd, [\rx, #UART_TX << UART_SHIFT]
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro busyuart,rd,rx
|
||
|
|
1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
|
||
|
|
and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
|
||
|
|
teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
|
||
|
|
bne 1002b
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/* The UART's don't have any flow control IO's wired up. */
|
||
|
|
.macro waituart,rd,rx
|
||
|
|
.endm
|