From 6339f6695f84e48b42021c6df91d81b17308fe92 Mon Sep 17 00:00:00 2001 From: Pavel Machek Date: Mon, 2 Nov 2009 11:48:29 +0100 Subject: msm: make debugging UART (for DEBUG_LL) configurable Provides options to select one of the three "lowspeed" UARTs on MSM7k SoCs for DEBUG_LL output from the zImage decompressor and kernel. Signed-off-by: Brian Swetland Signed-off-by: Pavel Machek Signed-off-by: Daniel Walker --- arch/arm/mach-msm/Kconfig | 24 ++++++++++++++++++++++++ arch/arm/mach-msm/include/mach/debug-macro.S | 24 +++++++++++++++++------- arch/arm/mach-msm/include/mach/msm_iomap.h | 12 ++++++++++++ arch/arm/mach-msm/include/mach/uncompress.h | 7 +++++++ arch/arm/mach-msm/io.c | 3 +++ 5 files changed, 63 insertions(+), 7 deletions(-) (limited to 'arch') diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig index d140abca690..35f2a90a2af 100644 --- a/arch/arm/mach-msm/Kconfig +++ b/arch/arm/mach-msm/Kconfig @@ -3,6 +3,30 @@ if ARCH_MSM comment "MSM Board Type" depends on ARCH_MSM +config MSM_DEBUG_UART + int + default 1 if MSM_DEBUG_UART1 + default 2 if MSM_DEBUG_UART2 + default 3 if MSM_DEBUG_UART3 + +choice + prompt "Debug UART" + + default MSM_DEBUG_UART_NONE + + config MSM_DEBUG_UART_NONE + bool "None" + + config MSM_DEBUG_UART1 + bool "UART1" + + config MSM_DEBUG_UART2 + bool "UART2" + + config MSM_DEBUG_UART3 + bool "UART3" +endchoice + config MACH_HALIBUT depends on ARCH_MSM default y diff --git a/arch/arm/mach-msm/include/mach/debug-macro.S b/arch/arm/mach-msm/include/mach/debug-macro.S index 1db3c97dbc4..d48747ebcd3 100644 --- a/arch/arm/mach-msm/include/mach/debug-macro.S +++ b/arch/arm/mach-msm/include/mach/debug-macro.S @@ -14,15 +14,18 @@ * */ + + #include #include +#ifdef CONFIG_MSM_DEBUG_UART .macro addruart,rx @ see if the MMU is enabled and select appropriate base address mrc p15, 0, \rx, c1, c0 tst \rx, #1 - ldreq \rx, =MSM_UART1_PHYS - movne \rx, #0 + ldreq \rx, =MSM_DEBUG_UART_PHYS + ldrne \rx, =MSM_DEBUG_UART_BASE .endm .macro senduart,rd,rx @@ -32,13 +35,20 @@ .macro waituart,rd,rx @ wait for TX_READY - teq \rx, #0 - bne 2f -1: ldr \rd, [\rx, #0x08] +1001: ldr \rd, [\rx, #0x08] tst \rd, #0x04 - beq 1b -2: + beq 1001b + .endm +#else + .macro addruart,rx + .endm + + .macro senduart,rd,rx + .endm + + .macro waituart,rd,rx .endm +#endif .macro busyuart,rd,rx .endm diff --git a/arch/arm/mach-msm/include/mach/msm_iomap.h b/arch/arm/mach-msm/include/mach/msm_iomap.h index 2f7b4c8620d..9dae1a98c77 100644 --- a/arch/arm/mach-msm/include/mach/msm_iomap.h +++ b/arch/arm/mach-msm/include/mach/msm_iomap.h @@ -84,6 +84,18 @@ #define MSM_UART3_PHYS 0xA9C00000 #define MSM_UART3_SIZE SZ_4K +#ifdef CONFIG_MSM_DEBUG_UART +#define MSM_DEBUG_UART_BASE 0xE1000000 +#if CONFIG_MSM_DEBUG_UART == 1 +#define MSM_DEBUG_UART_PHYS MSM_UART1_PHYS +#elif CONFIG_MSM_DEBUG_UART == 2 +#define MSM_DEBUG_UART_PHYS MSM_UART2_PHYS +#elif CONFIG_MSM_DEBUG_UART == 3 +#define MSM_DEBUG_UART_PHYS MSM_UART3_PHYS +#endif +#define MSM_DEBUG_UART_SIZE SZ_4K +#endif + #define MSM_SDC1_PHYS 0xA0400000 #define MSM_SDC1_SIZE SZ_4K diff --git a/arch/arm/mach-msm/include/mach/uncompress.h b/arch/arm/mach-msm/include/mach/uncompress.h index 026e8955ace..d94292c29d8 100644 --- a/arch/arm/mach-msm/include/mach/uncompress.h +++ b/arch/arm/mach-msm/include/mach/uncompress.h @@ -16,9 +16,16 @@ #ifndef __ASM_ARCH_MSM_UNCOMPRESS_H #include "hardware.h" +#include "linux/io.h" +#include "mach/msm_iomap.h" static void putc(int c) { +#if defined(MSM_DEBUG_UART_PHYS) + unsigned base = MSM_DEBUG_UART_PHYS; + while (!(readl(base + 0x08) & 0x04)) ; + writel(c, base + 0x0c); +#endif } static inline void flush(void) diff --git a/arch/arm/mach-msm/io.c b/arch/arm/mach-msm/io.c index 6e7692ff6f2..1c5e7dac086 100644 --- a/arch/arm/mach-msm/io.c +++ b/arch/arm/mach-msm/io.c @@ -42,6 +42,9 @@ static struct map_desc msm_io_desc[] __initdata = { MSM_DEVICE(GPIO1), MSM_DEVICE(GPIO2), MSM_DEVICE(CLK_CTL), +#ifdef CONFIG_MSM_DEBUG_UART + MSM_DEVICE(DEBUG_UART), +#endif { .virtual = (unsigned long) MSM_SHARED_RAM_BASE, .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS), -- cgit v1.2.3