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msm: Support DEBUG_LL on MSM8660 and MSM8960 

Add support for DEBUG_LL on the 8660 and 8960 development boards.
While we're here cleanup the uncompress.h code a bit. Avoid
the use of readl/writel as those are Linux specific APIs that
aren't guaranteed to work in the decompressor.

Cc: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
This commit is contained in:
Stephen Boyd 2011-11-08 10:33:04 -08:00 committed by David Brown
parent 650e3f0d66
commit a3d3ef9d4f
7 changed files with 95 additions and 11 deletions
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16
arch/arm/Kconfig.debug
View File

@ -268,6 +268,22 @@ choice
Say Y here if you want the debug print routines to direct
their output to the third serial port on MSM devices.
config DEBUG_MSM8660_UART
bool "Kernel low-level debugging messages via MSM 8660 UART"
depends on ARCH_MSM8X60
select MSM_HAS_DEBUG_UART_HS
help
Say Y here if you want the debug print routines to direct
their output to the serial port on MSM 8660 devices.
config DEBUG_MSM8960_UART
bool "Kernel low-level debugging messages via MSM 8960 UART"
depends on ARCH_MSM8960
select MSM_HAS_DEBUG_UART_HS
help
Say Y here if you want the debug print routines to direct
their output to the serial port on MSM 8960 devices.
endchoice
config EARLY_PRINTK

3
arch/arm/mach-msm/Kconfig
View File

@ -60,6 +60,9 @@ config ARCH_MSM8960
endchoice
config MSM_HAS_DEBUG_UART_HS
bool
config MSM_SOC_REV_A
bool
config ARCH_MSM_SCORPIONMP

32
arch/arm/mach-msm/include/mach/debug-macro.S
View File

@ -1,6 +1,7 @@
/*
*
* Copyright (C) 2007 Google, Inc.
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Author: Brian Swetland <swetland@google.com>
*
* This software is licensed under the terms of the GNU General Public
@ -24,17 +25,42 @@
#endif
.endm
.macro senduart,rd,rx
.macro senduart, rd, rx
#ifdef CONFIG_MSM_HAS_DEBUG_UART_HS
@ Write the 1 character to UARTDM_TF
str \rd, [\rx, #0x70]
#else
teq \rx, #0
strne \rd, [\rx, #0x0C]
#endif
.endm
.macro waituart,rd,rx
.macro waituart, rd, rx
#ifdef CONFIG_MSM_HAS_DEBUG_UART_HS
@ check for TX_EMT in UARTDM_SR
ldr \rd, [\rx, #0x08]
tst \rd, #0x08
bne 1002f
@ wait for TXREADY in UARTDM_ISR
1001: ldr \rd, [\rx, #0x14]
tst \rd, #0x80
beq 1001b
1002:
@ Clear TX_READY by writing to the UARTDM_CR register
mov \rd, #0x300
str \rd, [\rx, #0x10]
@ Write 0x1 to NCF register
mov \rd, #0x1
str \rd, [\rx, #0x40]
@ UARTDM reg. Read to induce delay
ldr \rd, [\rx, #0x08]
#else
@ wait for TX_READY
1001: ldr \rd, [\rx, #0x08]
tst \rd, #0x04
beq 1001b
#endif
.endm
.macro busyuart,rd,rx
.macro busyuart, rd, rx
.endm

5
arch/arm/mach-msm/include/mach/msm_iomap-8960.h
View File

@ -45,4 +45,9 @@
#define MSM8960_TMR0_PHYS 0x0208A000
#define MSM8960_TMR0_SIZE SZ_4K
#ifdef CONFIG_DEBUG_MSM8960_UART
#define MSM_DEBUG_UART_BASE 0xE1040000
#define MSM_DEBUG_UART_PHYS 0x16440000
#endif
#endif

5
arch/arm/mach-msm/include/mach/msm_iomap-8x60.h
View File

@ -62,4 +62,9 @@
#define MSM8X60_TMR0_PHYS 0x02040000
#define MSM8X60_TMR0_SIZE SZ_4K
#ifdef CONFIG_DEBUG_MSM8660_UART
#define MSM_DEBUG_UART_BASE 0xE1040000
#define MSM_DEBUG_UART_PHYS 0x19C40000
#endif
#endif

39
arch/arm/mach-msm/include/mach/uncompress.h
View File

@ -1,6 +1,6 @@
/* arch/arm/mach-msm/include/mach/uncompress.h
*
/*
* Copyright (C) 2007 Google, Inc.
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@ -14,17 +14,40 @@
*/
#ifndef __ASM_ARCH_MSM_UNCOMPRESS_H
#define __ASM_ARCH_MSM_UNCOMPRESS_H
#include "hardware.h"
#include "linux/io.h"
#include "mach/msm_iomap.h"
#include <asm/processor.h>
#include <mach/msm_iomap.h>
#define UART_CSR (*(volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x08))
#define UART_TF (*(volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x0c))
#define UART_DM_SR (*((volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x08)))
#define UART_DM_CR (*((volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x10)))
#define UART_DM_ISR (*((volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x14)))
#define UART_DM_NCHAR (*((volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x40)))
#define UART_DM_TF (*((volatile uint32_t *)(MSM_DEBUG_UART_PHYS + 0x70)))
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);
#ifdef CONFIG_MSM_HAS_DEBUG_UART_HS
/*
* Wait for TX_READY to be set; but skip it if we have a
* TX underrun.
*/
if (UART_DM_SR & 0x08)
while (!(UART_DM_ISR & 0x80))
cpu_relax();
UART_DM_CR = 0x300;
UART_DM_NCHAR = 0x1;
UART_DM_TF = c;
#else
while (!(UART_CSR & 0x04))
cpu_relax();
UART_TF = c;
#endif
#endif
}

6
arch/arm/mach-msm/io.c
View File

@ -111,6 +111,9 @@ static struct map_desc msm8x60_io_desc[] __initdata = {
MSM_CHIP_DEVICE(TMR0, MSM8X60),
MSM_DEVICE(ACC),
MSM_DEVICE(GCC),
#ifdef CONFIG_DEBUG_MSM8660_UART
MSM_DEVICE(DEBUG_UART),
#endif
};
void __init msm_map_msm8x60_io(void)
@ -125,6 +128,9 @@ static struct map_desc msm8960_io_desc[] __initdata = {
MSM_CHIP_DEVICE(QGIC_CPU, MSM8960),
MSM_CHIP_DEVICE(TMR, MSM8960),
MSM_CHIP_DEVICE(TMR0, MSM8960),
#ifdef CONFIG_DEBUG_MSM8960_UART
MSM_DEVICE(DEBUG_UART),
#endif
};
void __init msm_map_msm8960_io(void)