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Subject[PATCH 03/14] ARM: milbeaut: Add Milbeaut M10V early printk
Date
Add Milbeaut M10V earlyprintk.

Signed-off-by: Sugaya Taichi <sugaya.taichi@socionext.com>
---
arch/arm/Kconfig.debug | 12 ++++++++++--
arch/arm/include/debug/milbeaut.S | 25 +++++++++++++++++++++++++
2 files changed, 35 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/include/debug/milbeaut.S

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index d6a49f5..5c44533 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1413,6 +1413,11 @@ choice
options; the platform specific options are deprecated
and will be soon removed.

+ config DEBUG_LL_MILBEAUT_UART
+ bool "Kernel low-level debug output via USIO"
+ depends on ARCH_MILBEAUT
+ help
+ Say Y here if you want to debug with USIO
endchoice

config DEBUG_AT91_UART
@@ -1534,6 +1539,7 @@ config DEBUG_LL_INCLUDE
default "debug/bcm63xx.S" if DEBUG_BCM63XX_UART
default "debug/digicolor.S" if DEBUG_DIGICOLOR_UA0
default "debug/brcmstb.S" if DEBUG_BRCMSTB_UART
+ default "debug/milbeaut.S" if DEBUG_LL_MILBEAUT_UART
default "mach/debug-macro.S"

# Compatibility options for PL01x
@@ -1580,6 +1586,7 @@ config DEBUG_UART_PHYS
default 0x18020000 if DEBUG_SIRFATLAS7_UART1
default 0x18023000 if DEBUG_BCM_IPROC_UART3
default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
+ default 0x1e700010 if ARCH_MILBEAUT_M10V
default 0x20001000 if DEBUG_HIP01_UART
default 0x20060000 if DEBUG_RK29_UART0
default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
@@ -1681,7 +1688,7 @@ config DEBUG_UART_PHYS
DEBUG_S3C64XX_UART || \
DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \
DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \
- DEBUG_AT91_UART
+ DEBUG_AT91_UART || DEBUG_LL_MILBEAUT_UART

config DEBUG_UART_VIRT
hex "Virtual base address of debug UART"
@@ -1755,6 +1762,7 @@ config DEBUG_UART_VIRT
default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
default 0xfe230000 if DEBUG_PICOXCELL_UART
default 0xfe300000 if DEBUG_BCM_KONA_UART
+ default 0xfe700010 if ARCH_MILBEAUT_M10V
default 0xfe800000 if ARCH_IOP32X
default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HIX5HD2_UART
default 0xfeb24000 if DEBUG_RK3X_UART0
@@ -1796,7 +1804,7 @@ config DEBUG_UART_VIRT
DEBUG_S3C64XX_UART || \
DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \
DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \
- DEBUG_AT91_UART
+ DEBUG_AT91_UART || DEBUG_LL_MILBEAUT_UART

config DEBUG_UART_8250_SHIFT
int "Register offset shift for the 8250 debug UART"
diff --git a/arch/arm/include/debug/milbeaut.S b/arch/arm/include/debug/milbeaut.S
new file mode 100644
index 0000000..0660e0f
--- /dev/null
+++ b/arch/arm/include/debug/milbeaut.S
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Socionext Inc.
+ */
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+
+ .macro senduart,rd,rx
+ strh \rd, [\rx, #0x04] @ write to TxData register
+ .endm
+
+ .macro waituart,rd,rx
+1: ldrb \rd, [\rx, #0x03] @ SSR
+ tst \rd, #1 << 1 @ check TDRE bit
+ beq 1b
+ .endm
+
+ .macro busyuart,rd,rx
+2: ldrb \rd, [\rx, #0x03] @ SSR
+ tst \rd, #1 << 1 @ check TEMT bit
+ beq 2b
+ .endm
--
1.9.1
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