- Initial checkin of the freebios2 tree

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@784 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/console/uart8250_console.c

@@ -0,0 +1,49 @@
+#include <console/console.h>
+#include <uart8250.h>
+#include <pc80/mc146818rtc.h>
+
+/* Base Address */
+#ifndef TTYS0_BASE
+#define TTYS0_BASE 0x3f8
+#endif
+
+#ifndef TTYS0_BAUD
+#define TTYS0_BAUD 115200
+#endif
+
+#if ((115200%TTYS0_BAUD) != 0)
+#error Bad ttys0 baud rate
+#endif
+
+#define TTYS0_DIV	(115200/TTYS0_BAUD)
+
+/* Line Control Settings */
+#ifndef TTYS0_LCS
+/* Set 8bit, 1 stop bit, no parity */
+#define TTYS0_LCS	0x3
+#endif
+
+#define UART_LCS	TTYS0_LCS
+
+void ttyS0_init(void)
+{
+	static unsigned char div[8]={1,2,3,6,12,24,48,96};
+	int b_index=0;
+	unsigned int divisor=TTYS0_DIV;
+
+	if(get_option(&b_index,"baud_rate")==0) {
+		divisor=div[b_index];
+	}
+	uart8250_init(TTYS0_BASE, divisor, TTYS0_LCS);
+}
+
+void ttyS0_tx_byte(unsigned char data) 
+{
+	uart8250_tx_byte(TTYS0_BASE, data);
+}
+
+static struct console_driver uart8250_console __console = {
+	.init    = ttyS0_init,
+	.tx_byte = ttyS0_tx_byte,
+};
+