From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 9.mo1.mail-out.ovh.net ([178.32.108.172] helo=mo1.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Suylz-0007QF-4R for barebox@lists.infradead.org; Sat, 28 Jul 2012 04:37:03 +0000 Received: from mail94.ha.ovh.net (b7.ovh.net [213.186.33.57]) by mo1.mail-out.ovh.net (Postfix) with SMTP id E3A3EFF9286 for ; Sat, 28 Jul 2012 06:42:54 +0200 (CEST) From: Jean-Christophe PLAGNIOL-VILLARD Date: Sat, 28 Jul 2012 06:36:57 +0200 Message-Id: <1343450217-17073-1-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/1] arm: add debug_ll support To: barebox@lists.infradead.org Today we only use the DBGU port Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- arch/arm/Kconfig | 1 + arch/arm/mach-at91/include/mach/debug_ll.h | 37 ++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100644 arch/arm/mach-at91/include/mach/debug_ll.h diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 245bec8..a7f1bfb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -25,6 +25,7 @@ config ARCH_AT91 bool "Atmel AT91" select GENERIC_GPIO select CLKDEV_LOOKUP + select HAS_DEBUG_LL config ARCH_EP93XX bool "Cirrus Logic EP93xx" diff --git a/arch/arm/mach-at91/include/mach/debug_ll.h b/arch/arm/mach-at91/include/mach/debug_ll.h new file mode 100644 index 0000000..ee824cb --- /dev/null +++ b/arch/arm/mach-at91/include/mach/debug_ll.h @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2012 + * Jean-Christophe PLAGNIOL-VILLARD + * + * Under GPLv2 + */ + +#ifndef __MACH_DEBUG_LL_H__ +#define __MACH_DEBUG_LL_H__ + +#include +#include + +#define UART_BASE (AT91_BASE_SYS + AT91_DBGU) + +#define ATMEL_US_CSR 0x0014 +#define ATMEL_US_THR 0x001c +#define ATMEL_US_TXRDY (1 << 1) +#define ATMEL_US_TXEMPTY (1 << 9) + +/* + * The following code assumes the serial port has already been + * initialized by the bootloader. If you didn't setup a port in + * your bootloader then nothing will appear (which might be desired). + * + * This does not append a newline + */ +static void putc(int c) +{ + while (!(__raw_readl(UART_BASE + ATMEL_US_CSR) & ATMEL_US_TXRDY)) + barrier(); + __raw_writel(c, UART_BASE + ATMEL_US_THR); + + while (!(__raw_readl(UART_BASE + ATMEL_US_CSR) & ATMEL_US_TXEMPTY)) + barrier(); +} +#endif -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox