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Diffstat (limited to 'src/console/uart8250_console.c')
-rw-r--r--src/console/uart8250_console.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/console/uart8250_console.c b/src/console/uart8250_console.c
new file mode 100644
index 0000000000..6eeeb6aa55
--- /dev/null
+++ b/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,
+};
+