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authorPavel Machek <pavel@ucw.cz>2009-11-02 11:48:29 +0100
committerDaniel Walker <dwalker@fifo99.com>2009-11-20 06:40:05 -0800
commit6339f6695f84e48b42021c6df91d81b17308fe92 (patch)
tree38be250cc731428524eba5f1c598771f71780304 /arch
parent333a07437c31ea8c16a2b82071629a540ae1e50f (diff)
downloadop-kernel-dev-6339f6695f84e48b42021c6df91d81b17308fe92.zip
op-kernel-dev-6339f6695f84e48b42021c6df91d81b17308fe92.tar.gz
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 <swetland@google.com> Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-msm/Kconfig24
-rw-r--r--arch/arm/mach-msm/include/mach/debug-macro.S24
-rw-r--r--arch/arm/mach-msm/include/mach/msm_iomap.h12
-rw-r--r--arch/arm/mach-msm/include/mach/uncompress.h7
-rw-r--r--arch/arm/mach-msm/io.c3
5 files changed, 63 insertions, 7 deletions
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index d140abc..35f2a90 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 1db3c97..d48747e 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 <mach/hardware.h>
#include <mach/msm_iomap.h>
+#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 2f7b4c8..9dae1a9 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 026e895..d94292c 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 6e7692f..1c5e7da 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),
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