ARM: debug: Use generic 8250 debug_ll for omap3/4/5

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>

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 7a683b9..a39e536 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -664,7 +664,7 @@ choice
        config DEBUG_OMAP3UART3
                bool "Kernel low-level debugging messages via OMAP3 UART3 (most omap3 boards)"
                depends on ARCH_OMAP2PLUS
-               select DEBUG_OMAP2PLUS_UART
+               select DEBUG_UART_8250
                help
                  This covers at least cm_t3x, beagle, crane, devkit8000,
                  igep00x0, ldp, n900, n9(50), pandora, overo, touchbook,
@@ -673,17 +673,17 @@ choice
        config DEBUG_OMAP4UART3
                bool "Kernel low-level debugging messages via OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)"
                depends on ARCH_OMAP2PLUS
-               select DEBUG_OMAP2PLUS_UART
+               select DEBUG_UART_8250
 
        config DEBUG_OMAP3UART4
                bool "Kernel low-level debugging messages via OMAP36XX UART4"
                depends on ARCH_OMAP2PLUS
-               select DEBUG_OMAP2PLUS_UART
+               select DEBUG_UART_8250
 
        config DEBUG_OMAP4UART4
                bool "Kernel low-level debugging messages via OMAP4/5 UART4"
                depends on ARCH_OMAP2PLUS
-               select DEBUG_OMAP2PLUS_UART
+               select DEBUG_UART_8250
 
        config DEBUG_OMAP7XXUART1
                bool "Kernel low-level debugging via OMAP730 UART1"
@@ -1523,11 +1523,14 @@ 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 0x4806a000 if DEBUG_OMAP2UART1 || DEBUG_OMAP3UART1 || \
                                DEBUG_OMAP4UART1 || DEBUG_OMAP5UART1
        default 0x4806c000 if DEBUG_OMAP2UART2 || DEBUG_OMAP3UART2 || \
                                DEBUG_OMAP4UART2 || DEBUG_OMAP5UART2
-       default 0x4806e000 if DEBUG_OMAP2UART3
+       default 0x4806e000 if DEBUG_OMAP2UART3 || DEBUG_OMAP4UART4
+       default 0x49020000 if DEBUG_OMAP3UART3
+       default 0x49042000 if DEBUG_OMAP3UART4
        default 0x50000000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART0 || \
                                DEBUG_S3C2410_UART0)
        default 0x50004000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART1 || \
@@ -1646,15 +1649,18 @@ 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 0xfa06a000 if DEBUG_OMAP2UART1 || DEBUG_OMAP3UART1 || \
                                DEBUG_OMAP4UART1 || DEBUG_OMAP5UART1
        default 0xfa06c000 if DEBUG_OMAP2UART2 || DEBUG_OMAP3UART2 || \
                                DEBUG_OMAP4UART2 || DEBUG_OMAP5UART2
-       default 0xfa06e000 if DEBUG_OMAP2UART3
+       default 0xfa06e000 if DEBUG_OMAP2UART3 || DEBUG_OMAP4UART4
        default 0xfa71e000 if DEBUG_QCOM_UARTDM
        default 0xfb002000 if DEBUG_CNS3XXX
        default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
        default 0xfb00c000 if DEBUG_AT91_SAMA5D4_USART3
+       default 0xfb020000 if DEBUG_OMAP3UART3
+       default 0xfb042000 if DEBUG_OMAP3UART4
        default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
        default 0xfc705000 if DEBUG_ZTE_ZX
        default 0xfcfe8600 if DEBUG_BCM63XX_UART

diff --git a/arch/arm/include/debug/omap2plus.S b/arch/arm/include/debug/omap2plus.S
index 9a6369d..e4e0d82 100644 (file)
--- a/arch/arm/include/debug/omap2plus.S
+++ b/arch/arm/include/debug/omap2plus.S
@@ -13,14 +13,8 @@
 #include <linux/serial_reg.h>
 
 /* OMAP3 serial ports */
-#define OMAP3_UART3_BASE       0x49020000
-#define OMAP3_UART4_BASE       0x49042000      /* Only on 36xx */
 #define OMAP3_UART4_AM35XX_BASE        0x4809E000      /* Only on AM35xx */
 
-/* OMAP4 serial ports */
-#define OMAP4_UART3_BASE       0x48020000
-#define OMAP4_UART4_BASE       0x4806e000
-
 /* TI81XX serial ports */
 #define TI81XX_UART1_BASE      0x48020000
 #define TI81XX_UART2_BASE      0x48022000
@@ -32,12 +26,6 @@
 /* AM33XX serial port */
 #define AM33XX_UART1_BASE      0x44E09000
 
-/* OMAP5 serial ports */
-#define OMAP5_UART3_BASE       OMAP4_UART3_BASE
-#define OMAP5_UART4_BASE       OMAP4_UART4_BASE
-#define OMAP5_UART5_BASE       0x48066000
-#define OMAP5_UART6_BASE       0x48068000
-
 /* External port on Zoom2/3 */
 #define ZOOM_UART_BASE         0x10000000
 #define ZOOM_UART_VIRT         0xfa400000
@@ -68,26 +56,6 @@ omap_uart_lsr:       .word   0
                bne     100f                    @ already configured
 
                /* Configure the UART offset from the phys/virt base */
-#ifdef CONFIG_DEBUG_OMAP3UART3
-               mov     \rp, #UART_OFFSET(OMAP3_UART1_BASE)
-               add     \rp, \rp, #0x00fb0000
-               add     \rp, \rp, #0x00006000           @ OMAP3_UART3_BASE
-               b       98f
-#endif
-#ifdef CONFIG_DEBUG_OMAP4UART3
-               mov     \rp, #UART_OFFSET(OMAP4_UART3_BASE)
-               b       98f
-#endif
-#ifdef CONFIG_DEBUG_OMAP3UART4
-               mov     \rp, #UART_OFFSET(OMAP3_UART1_BASE)
-               add     \rp, \rp, #0x00fb0000
-               add     \rp, \rp, #0x00028000           @ OMAP3_UART4_BASE
-               b       98f
-#endif
-#ifdef CONFIG_DEBUG_OMAP4UART4
-               mov     \rp, #UART_OFFSET(OMAP4_UART4_BASE)
-               b       98f
-#endif
 #ifdef CONFIG_DEBUG_TI81XXUART1
                mov     \rp, #UART_OFFSET(TI81XX_UART1_BASE)
                b       98f