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ARM: debug: Use generic 8250 debug_ll for ti81xx 

We want to use generic 8250 debug_ll code to get DEBUG_UNCOMPRESS
working and to simplify the code. The old debug_ll code is no longer
needed and the machine ID based detection is no longer used.

Note that for most part there's no need to keep DEBUG_LL enabled.
We now have CONFIG_SERIAL_EARLYCON working very early as long as
the kernel cmdline has "earlycon" in it and the board specific dts
file has chosen configured with with the port using stdout-path.

Cc: Hoeun Ryu <hoeun.ryu@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2017-07-16 22:10:14 -07:00
parent fc23beb8a5
commit 2d1f7d2e24
2 changed files with 9 additions and 33 deletions
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14
arch/arm/Kconfig.debug
View File

@ -712,17 +712,17 @@ choice
config DEBUG_TI81XXUART1
bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
select DEBUG_UART_8250
config DEBUG_TI81XXUART2
bool "Kernel low-level debugging messages via TI81XX UART2"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
select DEBUG_UART_8250
config DEBUG_TI81XXUART3
bool "Kernel low-level debugging messages via TI81XX UART3 (ti8168evm)"
depends on ARCH_OMAP2PLUS
select DEBUG_OMAP2PLUS_UART
select DEBUG_UART_8250
config DEBUG_AM33XXUART1
bool "Kernel low-level debugging messages via AM33XX UART1"
@ -1523,7 +1523,9 @@ config DEBUG_UART_PHYS
default 0x40090000 if DEBUG_LPC32XX
default 0x40100000 if DEBUG_PXA_UART1
default 0x42000000 if DEBUG_GEMINI
default 0x48020000 if DEBUG_OMAP4UART3
default 0x48020000 if DEBUG_OMAP4UART3 || DEBUG_TI81XXUART1
default 0x48022000 if DEBUG_TI81XXUART2
default 0x48024000 if DEBUG_TI81XXUART3
default 0x4806a000 if DEBUG_OMAP2UART1 || DEBUG_OMAP3UART1 || \
DEBUG_OMAP4UART1 || DEBUG_OMAP5UART1
default 0x4806c000 if DEBUG_OMAP2UART2 || DEBUG_OMAP3UART2 || \
@ -1649,7 +1651,9 @@ config DEBUG_UART_VIRT
default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1
default 0xf8ffee00 if DEBUG_AT91_SAM9263_DBGU
default 0xf8fff200 if DEBUG_AT91_RM9200_DBGU
default 0xfa020000 if DEBUG_OMAP4UART3
default 0xfa020000 if DEBUG_OMAP4UART3 || DEBUG_TI81XXUART1
default 0xfa022000 if DEBUG_TI81XXUART2
default 0xfa024000 if DEBUG_TI81XXUART3
default 0xfa06a000 if DEBUG_OMAP2UART1 || DEBUG_OMAP3UART1 || \
DEBUG_OMAP4UART1 || DEBUG_OMAP5UART1
default 0xfa06c000 if DEBUG_OMAP2UART2 || DEBUG_OMAP3UART2 || \

28
arch/arm/include/debug/omap2plus.S
View File

@ -15,11 +15,6 @@
/* OMAP3 serial ports */
#define OMAP3_UART4_AM35XX_BASE 0x4809E000 /* Only on AM35xx */
/* TI81XX serial ports */
#define TI81XX_UART1_BASE 0x48020000
#define TI81XX_UART2_BASE 0x48022000
#define TI81XX_UART3_BASE 0x48024000
/* AM3505/3517 UART4 */
#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */
@ -56,18 +51,6 @@ omap_uart_lsr: .word 0
bne 100f @ already configured
/* Configure the UART offset from the phys/virt base */
#ifdef CONFIG_DEBUG_TI81XXUART1
mov \rp, #UART_OFFSET(TI81XX_UART1_BASE)
b 98f
#endif
#ifdef CONFIG_DEBUG_TI81XXUART2
mov \rp, #UART_OFFSET(TI81XX_UART2_BASE)
b 98f
#endif
#ifdef CONFIG_DEBUG_TI81XXUART3
mov \rp, #UART_OFFSET(TI81XX_UART3_BASE)
b 98f
#endif
#ifdef CONFIG_DEBUG_AM33XXUART1
ldr \rp, =AM33XX_UART1_BASE
and \rp, \rp, #0x00ffffff
@ -94,17 +77,6 @@ omap_uart_lsr: .word 0
b 10b
/* Store both phys and virt address for the uart */
98: add \rp, \rp, #0x48000000 @ phys base
str \rp, [\tmp, #0] @ omap_uart_phys
sub \rp, \rp, #0x48000000 @ phys base
add \rp, \rp, #0xfa000000 @ virt base
str \rp, [\tmp, #4] @ omap_uart_virt
mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
str \rp, [\tmp, #8] @ omap_uart_lsr
b 10b
.align
99: .word .
.word omap_uart_phys