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| author | Florian Fainelli <f.fainelli@gmail.com> | 2014-01-08 21:19:50 +0400 |
|---|---|---|
| committer | Florian Fainelli <f.fainelli@gmail.com> | 2014-09-17 21:56:06 +0400 |
| commit | b51312bebfa4452470c2bbf179200cb7c16d82d4 (patch) | |
| tree | 9a4156a40cc948f39af584979607b6967b801ac4 /arch/arm/include | |
| parent | dc6aec60e15fec86cdafc47d9fe3e2ca6c10958b (diff) | |
| download | linux-b51312bebfa4452470c2bbf179200cb7c16d82d4.tar.xz | |
ARM: BCM63XX: add low-level UART debug support
Broadcom BCM63xx DSL SoCs have a different UART implementation for which
we need specially crafted low-level debug assembly code to support. Add
support for this using the standard definitions provided in
include/linux/serial_bcm63xx.h (shared with their MIPS counterparts).
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/debug/bcm63xx.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/include/debug/bcm63xx.S b/arch/arm/include/debug/bcm63xx.S new file mode 100644 index 000000000000..e7164d570f44 --- /dev/null +++ b/arch/arm/include/debug/bcm63xx.S @@ -0,0 +1,33 @@ +/* + * Broadcom BCM63xx low-level UART debug + * + * Copyright (C) 2014 Broadcom Corporation + * + * 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. + */ + +#include <linux/serial_bcm63xx.h> + + .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS + ldr \rv, =CONFIG_DEBUG_UART_VIRT + .endm + + .macro senduart, rd, rx + /* word access do not work */ + strb \rd, [\rx, #UART_FIFO_REG] + .endm + + .macro waituart, rd, rx +1001: ldr \rd, [\rx, #UART_IR_REG] + tst \rd, #(1 << UART_IR_TXEMPTY) + beq 1001b + .endm + + .macro busyuart, rd, rx +1002: ldr \rd, [\rx, #UART_IR_REG] + tst \rd, #(1 << UART_IR_TXTRESH) + beq 1002b + .endm |