ARM: brcmstb: Add earlyprintk support using run-time checks
The SUN_TOP_CTRL_FAMILY_ID register is at a fixed absolute address for
all of our supported chips, so utilize its value to determine what the
UARTA base address should be based on the value we read.
Since the code is called both during decompressor when the MMU is off,
and after the MMU has been turned on in the kernel, and we want to do
the lookup only once, we use the same technique as tegra.S and have a
shared storage location between the decompressor and the kernel.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index a9693b6..a660508 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -186,10 +186,11 @@
config DEBUG_BRCMSTB_UART
bool "Use BRCMSTB UART for low-level debug"
depends on ARCH_BRCMSTB
- select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
- their output to the first serial port on these devices.
+ their output to the first serial port on these devices. The
+ UART physical and virtual address is automatically provided
+ based on the chip identification register value.
If you have a Broadcom STB chip and would like early print
messages to appear over the UART, select this option.
@@ -1430,6 +1431,7 @@
default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
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 "mach/debug-macro.S"
# Compatibility options for PL01x
@@ -1520,7 +1522,6 @@
default 0xe6e60000 if DEBUG_RCAR_GEN2_SCIF0
default 0xe8008000 if DEBUG_R7S72100_SCIF2
default 0xf0000be0 if ARCH_EBSA110
- default 0xf040ab00 if DEBUG_BRCMSTB_UART
default 0xf1012000 if DEBUG_MVEBU_UART0_ALTERNATE
default 0xf1012100 if DEBUG_MVEBU_UART1_ALTERNATE
default 0xf7fc9000 if DEBUG_BERLIN_UART
@@ -1604,7 +1605,6 @@
default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
default 0xfb00c000 if DEBUG_AT91_SAMA5D4_USART3
default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
- default 0xfc40ab00 if DEBUG_BRCMSTB_UART
default 0xfc705000 if DEBUG_ZTE_ZX
default 0xfcfe8600 if DEBUG_BCM63XX_UART
default 0xfd000000 if DEBUG_SPEAR3XX || DEBUG_SPEAR13XX
@@ -1677,8 +1677,7 @@
DEBUG_ALPINE_UART0 || \
DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
DEBUG_DAVINCI_DA8XX_UART2 || \
- DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2 || \
- DEBUG_BRCMSTB_UART
+ DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2
config DEBUG_UART_8250_PALMCHIP
bool "8250 UART is Palmchip BK-310x"
@@ -1697,7 +1696,8 @@
bool
depends on ARCH_MULTIPLATFORM || PLAT_SAMSUNG || ARM_SINGLE_ARMV7M
default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
- (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
+ (!DEBUG_TEGRA_UART || !ZBOOT_ROM) && \
+ !DEBUG_BRCMSTB_UART
help
This option influences the normal decompressor output for
multiplatform kernels. Normally, multiplatform kernels disable