[PATCH 02/10] ARM: at91: uncompress: autodetect the uart to use
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Sun Apr 8 11:39:58 EDT 2012
This will now autodetect the first uart enabled by the bootloader
and will use it for uncompress. This will still assume that the bootloader
configured it (pin and clock).
This also allow to include all the soc header together.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre at atmel.com>
---
arch/arm/mach-at91/Kconfig | 53 --------
arch/arm/mach-at91/include/mach/at91rm9200.h | 5 -
arch/arm/mach-at91/include/mach/at91sam9260.h | 7 -
arch/arm/mach-at91/include/mach/at91sam9261.h | 4 -
arch/arm/mach-at91/include/mach/at91sam9263.h | 4 -
arch/arm/mach-at91/include/mach/at91sam9g45.h | 5 -
arch/arm/mach-at91/include/mach/at91sam9rl.h | 5 -
arch/arm/mach-at91/include/mach/at91sam9x5.h | 8 -
arch/arm/mach-at91/include/mach/hardware.h | 16 +--
arch/arm/mach-at91/include/mach/uncompress.h | 170 +++++++++++++++++++++----
10 files changed, 148 insertions(+), 129 deletions(-)
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 8acc164..885fdb9 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -9,15 +9,6 @@ config HAVE_AT91_DBGU0
config HAVE_AT91_DBGU1
bool
-config HAVE_AT91_USART3
- bool
-
-config HAVE_AT91_USART4
- bool
-
-config HAVE_AT91_USART5
- bool
-
config AT91_SAM9_ALT_RESET
bool
default !ARCH_AT91X40
@@ -36,16 +27,12 @@ config ARCH_AT91RM9200
select CPU_ARM920T
select GENERIC_CLOCKEVENTS
select HAVE_AT91_DBGU0
- select HAVE_AT91_USART3
config ARCH_AT91SAM9260
bool "AT91SAM9260 or AT91SAM9XE"
select CPU_ARM926T
select GENERIC_CLOCKEVENTS
select HAVE_AT91_DBGU0
- select HAVE_AT91_USART3
- select HAVE_AT91_USART4
- select HAVE_AT91_USART5
select HAVE_NET_MACB
config ARCH_AT91SAM9261
@@ -74,7 +61,6 @@ config ARCH_AT91SAM9RL
bool "AT91SAM9RL"
select CPU_ARM926T
select GENERIC_CLOCKEVENTS
- select HAVE_AT91_USART3
select HAVE_FB_ATMEL
select HAVE_AT91_DBGU0
@@ -83,16 +69,12 @@ config ARCH_AT91SAM9G20
select CPU_ARM926T
select GENERIC_CLOCKEVENTS
select HAVE_AT91_DBGU0
- select HAVE_AT91_USART3
- select HAVE_AT91_USART4
- select HAVE_AT91_USART5
select HAVE_NET_MACB
config ARCH_AT91SAM9G45
bool "AT91SAM9G45 or AT91SAM9M10 families"
select CPU_ARM926T
select GENERIC_CLOCKEVENTS
- select HAVE_AT91_USART3
select HAVE_FB_ATMEL
select HAVE_NET_MACB
select HAVE_AT91_DBGU1
@@ -526,41 +508,6 @@ config AT91_TIMER_HZ
system clock (of at least several MHz), rounding is less of a
problem so it can be safer to use a decimal values like 100.
-choice
- prompt "Select a UART for early kernel messages"
-
-config AT91_EARLY_DBGU0
- bool "DBGU on rm9200, 9260/9g20, 9261/9g10, 9rl and 9x5"
- depends on HAVE_AT91_DBGU0
-
-config AT91_EARLY_DBGU1
- bool "DBGU on 9263 and 9g45"
- depends on HAVE_AT91_DBGU1
-
-config AT91_EARLY_USART0
- bool "USART0"
-
-config AT91_EARLY_USART1
- bool "USART1"
-
-config AT91_EARLY_USART2
- bool "USART2"
- depends on ! ARCH_AT91X40
-
-config AT91_EARLY_USART3
- bool "USART3"
- depends on HAVE_AT91_USART3
-
-config AT91_EARLY_USART4
- bool "USART4"
- depends on HAVE_AT91_USART4
-
-config AT91_EARLY_USART5
- bool "USART5"
- depends on HAVE_AT91_USART5
-
-endchoice
-
endmenu
endif
diff --git a/arch/arm/mach-at91/include/mach/at91rm9200.h b/arch/arm/mach-at91/include/mach/at91rm9200.h
index 603e6aa..e67317c 100644
--- a/arch/arm/mach-at91/include/mach/at91rm9200.h
+++ b/arch/arm/mach-at91/include/mach/at91rm9200.h
@@ -88,11 +88,6 @@
#define AT91RM9200_BASE_RTC 0xfffffe00 /* Real-Time Clock */
#define AT91RM9200_BASE_MC 0xffffff00 /* Memory Controllers */
-#define AT91_USART0 AT91RM9200_BASE_US0
-#define AT91_USART1 AT91RM9200_BASE_US1
-#define AT91_USART2 AT91RM9200_BASE_US2
-#define AT91_USART3 AT91RM9200_BASE_US3
-
/*
* Internal Memory.
*/
diff --git a/arch/arm/mach-at91/include/mach/at91sam9260.h b/arch/arm/mach-at91/include/mach/at91sam9260.h
index 08ae9af..416c7b6 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9260.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9260.h
@@ -95,13 +95,6 @@
#define AT91SAM9260_BASE_WDT 0xfffffd40
#define AT91SAM9260_BASE_GPBR 0xfffffd50
-#define AT91_USART0 AT91SAM9260_BASE_US0
-#define AT91_USART1 AT91SAM9260_BASE_US1
-#define AT91_USART2 AT91SAM9260_BASE_US2
-#define AT91_USART3 AT91SAM9260_BASE_US3
-#define AT91_USART4 AT91SAM9260_BASE_US4
-#define AT91_USART5 AT91SAM9260_BASE_US5
-
/*
* Internal Memory.
diff --git a/arch/arm/mach-at91/include/mach/at91sam9261.h b/arch/arm/mach-at91/include/mach/at91sam9261.h
index 44fbdc1..a041406 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9261.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9261.h
@@ -79,10 +79,6 @@
#define AT91SAM9261_BASE_WDT 0xfffffd40
#define AT91SAM9261_BASE_GPBR 0xfffffd50
-#define AT91_USART0 AT91SAM9261_BASE_US0
-#define AT91_USART1 AT91SAM9261_BASE_US1
-#define AT91_USART2 AT91SAM9261_BASE_US2
-
/*
* Internal Memory.
diff --git a/arch/arm/mach-at91/include/mach/at91sam9263.h b/arch/arm/mach-at91/include/mach/at91sam9263.h
index d96cbb2..d201029 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9263.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9263.h
@@ -95,10 +95,6 @@
#define AT91SAM9263_BASE_RTT1 0xfffffd50
#define AT91SAM9263_BASE_GPBR 0xfffffd60
-#define AT91_USART0 AT91SAM9263_BASE_US0
-#define AT91_USART1 AT91SAM9263_BASE_US1
-#define AT91_USART2 AT91SAM9263_BASE_US2
-
#define AT91_SMC AT91_SMC0
/*
diff --git a/arch/arm/mach-at91/include/mach/at91sam9g45.h b/arch/arm/mach-at91/include/mach/at91sam9g45.h
index d052abc..3a4da24 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9g45.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9g45.h
@@ -106,11 +106,6 @@
#define AT91SAM9G45_BASE_RTC 0xfffffdb0
#define AT91SAM9G45_BASE_GPBR 0xfffffd60
-#define AT91_USART0 AT91SAM9G45_BASE_US0
-#define AT91_USART1 AT91SAM9G45_BASE_US1
-#define AT91_USART2 AT91SAM9G45_BASE_US2
-#define AT91_USART3 AT91SAM9G45_BASE_US3
-
/*
* Internal Memory.
*/
diff --git a/arch/arm/mach-at91/include/mach/at91sam9rl.h b/arch/arm/mach-at91/include/mach/at91sam9rl.h
index e0073eb..a15db56 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9rl.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9rl.h
@@ -89,11 +89,6 @@
#define AT91SAM9RL_BASE_GPBR 0xfffffd60
#define AT91SAM9RL_BASE_RTC 0xfffffe00
-#define AT91_USART0 AT91SAM9RL_BASE_US0
-#define AT91_USART1 AT91SAM9RL_BASE_US1
-#define AT91_USART2 AT91SAM9RL_BASE_US2
-#define AT91_USART3 AT91SAM9RL_BASE_US3
-
/*
* Internal Memory.
diff --git a/arch/arm/mach-at91/include/mach/at91sam9x5.h b/arch/arm/mach-at91/include/mach/at91sam9x5.h
index 88e43d5..c75ee19 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9x5.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9x5.h
@@ -55,14 +55,6 @@
#define AT91SAM9X5_BASE_USART2 0xf8024000
/*
- * Base addresses for early serial code (uncompress.h)
- */
-#define AT91_DBGU AT91_BASE_DBGU0
-#define AT91_USART0 AT91SAM9X5_BASE_USART0
-#define AT91_USART1 AT91SAM9X5_BASE_USART1
-#define AT91_USART2 AT91SAM9X5_BASE_USART2
-
-/*
* Internal Memory.
*/
#define AT91SAM9X5_SRAM_BASE 0x00300000 /* Internal SRAM base address */
diff --git a/arch/arm/mach-at91/include/mach/hardware.h b/arch/arm/mach-at91/include/mach/hardware.h
index e9e29a6..3a01f8f 100644
--- a/arch/arm/mach-at91/include/mach/hardware.h
+++ b/arch/arm/mach-at91/include/mach/hardware.h
@@ -22,27 +22,17 @@
/* 9263, 9g45 */
#define AT91_BASE_DBGU1 0xffffee00
-#if defined(CONFIG_ARCH_AT91RM9200)
+#if defined(CONFIG_ARCH_AT91X40)
+#include <mach/at91x40.h>
+#else
#include <mach/at91rm9200.h>
-#elif defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
#include <mach/at91sam9260.h>
-#elif defined(CONFIG_ARCH_AT91SAM9261) || defined(CONFIG_ARCH_AT91SAM9G10)
#include <mach/at91sam9261.h>
-#elif defined(CONFIG_ARCH_AT91SAM9263)
#include <mach/at91sam9263.h>
-#elif defined(CONFIG_ARCH_AT91SAM9RL)
#include <mach/at91sam9rl.h>
-#elif defined(CONFIG_ARCH_AT91SAM9G45)
#include <mach/at91sam9g45.h>
-#elif defined(CONFIG_ARCH_AT91SAM9X5)
#include <mach/at91sam9x5.h>
-#elif defined(CONFIG_ARCH_AT91X40)
-#include <mach/at91x40.h>
-#else
-#error "Unsupported AT91 processor"
-#endif
-#if !defined(CONFIG_ARCH_AT91X40)
/*
* On all at91 except rm9200 and x40 have the System Controller starts
* at address 0xffffc000 and has a size of 16KiB.
diff --git a/arch/arm/mach-at91/include/mach/uncompress.h b/arch/arm/mach-at91/include/mach/uncompress.h
index d985af7..6f6118d 100644
--- a/arch/arm/mach-at91/include/mach/uncompress.h
+++ b/arch/arm/mach-at91/include/mach/uncompress.h
@@ -1,7 +1,8 @@
/*
* arch/arm/mach-at91/include/mach/uncompress.h
*
- * Copyright (C) 2003 SAN People
+ * Copyright (C) 2003 SAN People
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -25,32 +26,149 @@
#include <linux/atmel_serial.h>
#include <mach/hardware.h>
-#if defined(CONFIG_AT91_EARLY_DBGU0)
-#define UART_OFFSET AT91_BASE_DBGU0
-#elif defined(CONFIG_AT91_EARLY_DBGU1)
-#define UART_OFFSET AT91_BASE_DBGU1
-#elif defined(CONFIG_AT91_EARLY_USART0)
-#define UART_OFFSET AT91_USART0
-#elif defined(CONFIG_AT91_EARLY_USART1)
-#define UART_OFFSET AT91_USART1
-#elif defined(CONFIG_AT91_EARLY_USART2)
-#define UART_OFFSET AT91_USART2
-#elif defined(CONFIG_AT91_EARLY_USART3)
-#define UART_OFFSET AT91_USART3
-#elif defined(CONFIG_AT91_EARLY_USART4)
-#define UART_OFFSET AT91_USART4
-#elif defined(CONFIG_AT91_EARLY_USART5)
-#define UART_OFFSET AT91_USART5
-#endif
+#include <mach/at91_dbgu.h>
+#include <mach/cpu.h>
void __iomem *at91_uart;
+#if !defined(CONFIG_ARCH_AT91X40)
+static const u32 uarts_rm9200[] = {
+ AT91_BASE_DBGU0,
+ AT91RM9200_BASE_US0,
+ AT91RM9200_BASE_US1,
+ AT91RM9200_BASE_US2,
+ AT91RM9200_BASE_US3,
+ 0,
+};
+
+static const u32 uarts_sam9260[] = {
+ AT91_BASE_DBGU0,
+ AT91SAM9260_BASE_US0,
+ AT91SAM9260_BASE_US1,
+ AT91SAM9260_BASE_US2,
+ AT91SAM9260_BASE_US3,
+ AT91SAM9260_BASE_US4,
+ AT91SAM9260_BASE_US5,
+ 0,
+};
+
+static const u32 uarts_sam9261[] = {
+ AT91_BASE_DBGU0,
+ AT91SAM9261_BASE_US0,
+ AT91SAM9261_BASE_US1,
+ AT91SAM9261_BASE_US2,
+ 0,
+};
+
+static const u32 uarts_sam9263[] = {
+ AT91_BASE_DBGU1,
+ AT91SAM9263_BASE_US0,
+ AT91SAM9263_BASE_US1,
+ AT91SAM9263_BASE_US2,
+ 0,
+};
+
+static const u32 uarts_sam9g45[] = {
+ AT91_BASE_DBGU1,
+ AT91SAM9G45_BASE_US0,
+ AT91SAM9G45_BASE_US1,
+ AT91SAM9G45_BASE_US2,
+ AT91SAM9G45_BASE_US3,
+ 0,
+};
+
+static const u32 uarts_sam9rl[] = {
+ AT91_BASE_DBGU0,
+ AT91SAM9RL_BASE_US0,
+ AT91SAM9RL_BASE_US1,
+ AT91SAM9RL_BASE_US2,
+ AT91SAM9RL_BASE_US3,
+ 0,
+};
+
+static const u32 uarts_sam9x5[] = {
+ AT91_BASE_DBGU0,
+ AT91SAM9X5_BASE_USART0,
+ AT91SAM9X5_BASE_USART1,
+ AT91SAM9X5_BASE_USART2,
+ 0,
+};
+
+static inline const u32* decomp_soc_detect(u32 dbgu_base)
+{
+ u32 cidr, socid;
+
+ cidr = __raw_readl(dbgu_base + AT91_DBGU_CIDR);
+ socid = cidr & ~AT91_CIDR_VERSION;
+
+ switch (socid) {
+ case ARCH_ID_AT91RM9200:
+ return uarts_rm9200;
+
+ case ARCH_ID_AT91SAM9G20:
+ case ARCH_ID_AT91SAM9260:
+ return uarts_sam9260;
+
+ case ARCH_ID_AT91SAM9261:
+ return uarts_sam9261;
+
+ case ARCH_ID_AT91SAM9263:
+ return uarts_sam9263;
+
+ case ARCH_ID_AT91SAM9G45:
+ return uarts_sam9g45;
+
+ case ARCH_ID_AT91SAM9RL64:
+ return uarts_sam9rl;
+
+ case ARCH_ID_AT91SAM9X5:
+ return uarts_sam9x5;
+ }
+
+ /* at91sam9g10 */
+ if ((cidr & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
+ return uarts_sam9261;
+ }
+ /* at91sam9xe */
+ else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
+ return uarts_sam9260;
+ }
+
+ return NULL;
+}
+
static inline void arch_decomp_setup(void)
{
-#ifdef UART_OFFSET
- at91_uart = (void __iomem *) UART_OFFSET; /* physical address */
-#endif
+ int i = 0;
+ const u32* usarts;
+
+ usarts = decomp_soc_detect(AT91_BASE_DBGU0);
+
+ if (!usarts)
+ usarts = decomp_soc_detect(AT91_BASE_DBGU1);
+ if (!usarts) {
+ at91_uart = NULL;
+ return;
+ }
+
+ do {
+ /* physical address */
+ at91_uart = (void __iomem *)usarts[i];
+
+ if (__raw_readl(at91_uart + ATMEL_US_BRGR))
+ return;
+ i++;
+ } while (usarts[i]);
+
+ at91_uart = NULL;
}
+#else
+static inline void arch_decomp_setup(void)
+{
+ at91_uart = NULL;
+}
+#endif
+
/*
* The following code assumes the serial port has already been
* initialized by the bootloader. If you didn't setup a port in
@@ -60,20 +178,22 @@ static inline void arch_decomp_setup(void)
*/
static void putc(int c)
{
-#ifdef UART_OFFSET
+ if (!at91_uart)
+ return;
+
while (!(__raw_readl(at91_uart + ATMEL_US_CSR) & ATMEL_US_TXRDY))
barrier();
__raw_writel(c, at91_uart + ATMEL_US_THR);
-#endif
}
static inline void flush(void)
{
-#ifdef UART_OFFSET
+ if (!at91_uart)
+ return;
+
/* wait for transmission to complete */
while (!(__raw_readl(at91_uart + ATMEL_US_CSR) & ATMEL_US_TXEMPTY))
barrier();
-#endif
}
#define arch_decomp_wdog()
--
1.7.9.1
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