On Wed, 2 Aug 2006 17:03:53 +0100
Russell King <[email protected]> wrote:
> On Wed, Aug 02, 2006 at 06:00:23PM +0200, Haavard Skinnemoen wrote:
> > What is the best way to get the serial console up and running early
> > in the boot process?
>
> There is no generic solution to this problem other than to put up with
> the late initialisation of serial console.
>
> If you want a serial console earlier, have a look at how the
> 8250_early stuff works.
Ok, thanks. I'll have a look at it later.
Here's an updated patch.
Haavard
From: Haavard Skinnemoen <[email protected]>
Date: Wed, 2 Aug 2006 14:59:13 +0200
Subject: [PATCH 1/3] at91_serial: support AVR32
This makes it possible to select and build the at91_serial driver
on AVR32. It also #ifdefs out some AT91-specific code for AVR32.
Signed-off-by: Haavard Skinnemoen <[email protected]>
---
drivers/serial/Kconfig | 12 ++++++------
drivers/serial/at91_serial.c | 9 +++++++++
2 files changed, 15 insertions(+), 6 deletions(-)
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 5b48ac2..61b5b52 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -301,21 +301,21 @@ config SERIAL_AMBA_PL011_CONSOLE
config SERIAL_AT91
bool "AT91RM9200 / AT91SAM9261 serial port support"
- depends on ARM && (ARCH_AT91RM9200 || ARCH_AT91SAM9261)
+ depends on ARM && (ARCH_AT91RM9200 || ARCH_AT91SAM9261) || AVR32
select SERIAL_CORE
help
This enables the driver for the on-chip UARTs of the Atmel
- AT91RM9200 and AT91SAM926 processor.
+ AT91RM9200, AT91SAM926 and AT32AP7000 processors.
config SERIAL_AT91_CONSOLE
bool "Support for console on AT91RM9200 / AT91SAM9261 serial port"
depends on SERIAL_AT91=y
select SERIAL_CORE_CONSOLE
help
- Say Y here if you wish to use a UART on the Atmel AT91RM9200 or
- AT91SAM9261 as the system console (the system console is the device
- which receives all kernel messages and warnings and which allows
- logins in single user mode).
+ Say Y here if you wish to use a UART on the Atmel AT91RM9200,
+ AT91SAM9261 or AT32AP7000 as the system console (the system console
+ is the device which receives all kernel messages and warnings and
+ which allows logins in single user mode).
config SERIAL_AT91_TTYAT
bool "Install as device ttyAT0-4 instead of ttyS0-4"
diff --git a/drivers/serial/at91_serial.c b/drivers/serial/at91_serial.c
index 54c6b2a..bee81ff 100644
--- a/drivers/serial/at91_serial.c
+++ b/drivers/serial/at91_serial.c
@@ -40,8 +40,10 @@ #include <asm/arch/at91rm9200_usart.h>
#include <asm/arch/at91rm9200_pdc.h>
#include <asm/mach/serial_at91.h>
#include <asm/arch/board.h>
+#ifdef CONFIG_ARM
#include <asm/arch/system.h>
#include <asm/arch/gpio.h>
+#endif
#if defined(CONFIG_SERIAL_AT91_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
@@ -134,6 +136,7 @@ static void at91_set_mctrl(struct uart_p
unsigned int control = 0;
unsigned int mode;
+#ifdef CONFIG_ARM
if (arch_identify() == ARCH_ID_AT91RM9200) {
/*
* AT91RM9200 Errata #39: RTS0 is not internally connected to PA21.
@@ -146,6 +149,7 @@ static void at91_set_mctrl(struct uart_p
at91_set_gpio_value(AT91_PIN_PA21, 1);
}
}
+#endif
if (mctrl & TIOCM_RTS)
control |= AT91_US_RTSEN;
@@ -693,12 +697,17 @@ static void __devinit at91_init_port(str
port->mapbase = pdev->resource[0].start;
port->irq = pdev->resource[1].start;
+#ifdef CONFIG_AVR32
+ port->flags |= UPF_IOREMAP;
+ port->membase = NULL;
+#else
if (port->mapbase == AT91_VA_BASE_SYS + AT91_DBGU) /* Part of system perpherals - already mapped */
port->membase = (void __iomem *) port->mapbase;
else {
port->flags |= UPF_IOREMAP;
port->membase = NULL;
}
+#endif
if (!at91_port->clk) { /* for console, the clock could already be configured */
at91_port->clk = clk_get(&pdev->dev, "usart");
--
1.4.0
-
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