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From: Vicente Bergas <vicencb@gmail.com>
To: barebox@lists.infradead.org
Cc: Vicente Bergas <vicencb@gmail.com>
Subject: [PATCH 4/9] omap_uart: add low level port serial initialization
Date: Sun, 10 Mar 2013 00:19:37 +0100	[thread overview]
Message-ID: <1362871182-25726-5-git-send-email-vicencb@gmail.com> (raw)
In-Reply-To: <1362871182-25726-1-git-send-email-vicencb@gmail.com>

 some sort of UART setup has to be done in order to use PUTC_LL

Signed-off-by: Vicente Bergas <vicencb@gmail.com>
---
 arch/arm/mach-omap/include/mach/debug_ll.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/mach-omap/include/mach/debug_ll.h b/arch/arm/mach-omap/include/mach/debug_ll.h
index eea6eb3..9740848 100644
--- a/arch/arm/mach-omap/include/mach/debug_ll.h
+++ b/arch/arm/mach-omap/include/mach/debug_ll.h
@@ -45,9 +45,30 @@
 #endif
 
 #define LSR_THRE	0x20	/* Xmit holding register empty */
+#define LCR_BKSE	0x80	/* Bank select enable */
 #define LSR		(5 << 2)
 #define THR		(0 << 2)
+#define DLL		(0 << 2)
+#define IER		(1 << 2)
+#define DLM		(1 << 2)
+#define FCR		(2 << 2)
+#define LCR		(3 << 2)
+#define MCR		(4 << 2)
+#define MDR		(8 << 2)
 
+static inline void INIT_LL(void)
+{
+	writeb(0x00, UART_BASE + LCR);
+	writeb(0x00, UART_BASE + IER);
+	writeb(0x07, UART_BASE + MDR);
+	writeb(LCR_BKSE, UART_BASE + LCR);
+	writeb(26, UART_BASE + DLL); /* 115200 */
+	writeb(0, UART_BASE + DLM);
+	writeb(0x03, UART_BASE + LCR);
+	writeb(0x03, UART_BASE + MCR);
+	writeb(0x07, UART_BASE + FCR);
+	writeb(0x00, UART_BASE + MDR);
+}
 static inline void PUTC_LL(char c)
 {
 	/* Wait until there is space in the FIFO */
-- 
1.8.1.5


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  parent reply	other threads:[~2013-03-09 23:20 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-09 23:19 [PATCH 0/9] Add support for booting ArchosG9 from sd-card Vicente Bergas
2013-03-09 23:19 ` [PATCH 1/9] defaultenv-2: don't load nonexistent file Vicente Bergas
2013-03-09 23:19 ` [PATCH 2/9] omap4_romusb: rename omap4_usbboot_pdata to omap4_usbboot_data Vicente Bergas
2013-03-09 23:19 ` [PATCH 3/9] omap_uart: rename OMAP3EVM_UARTx to OMAP_UARTx Vicente Bergas
2013-03-09 23:19 ` Vicente Bergas [this message]
2013-03-10 13:16   ` [PATCH 4/9] omap_uart: add low level port serial initialization Jean-Christophe PLAGNIOL-VILLARD
2013-03-10 22:16     ` vj
2013-03-10 22:35       ` Sascha Hauer
2013-03-10 22:44         ` vj
2013-03-10 23:01           ` Sascha Hauer
2013-03-10 23:09             ` vj
2013-03-09 23:19 ` [PATCH 5/9] panda: remove unused configuration items Vicente Bergas
2013-03-09 23:19 ` [PATCH 6/9] omap4_romusb: allow adding usb-serial when not booting from usb Vicente Bergas
2013-03-14  7:50   ` Sascha Hauer
2013-03-09 23:19 ` [PATCH 7/9] menu: avoid errors when building submenus Vicente Bergas
2013-03-10 13:16   ` Jean-Christophe PLAGNIOL-VILLARD
2013-03-10 22:29     ` vj
2013-03-11  8:50       ` Sascha Hauer
2013-03-09 23:19 ` [PATCH 8/9] archos: add atag appender for all features Vicente Bergas
2013-03-11  8:36   ` Sascha Hauer
2013-03-09 23:19 ` [PATCH 9/9] archosg9: enable booting from sd-card Vicente Bergas
2013-03-11 21:25 ` [PATCH 0/9] Add support for booting ArchosG9 " Sascha Hauer

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