summaryrefslogtreecommitdiff
path: root/payloads/libpayload/drivers/serial.c
diff options
context:
space:
mode:
Diffstat (limited to 'payloads/libpayload/drivers/serial.c')
-rw-r--r--payloads/libpayload/drivers/serial.c56
1 files changed, 43 insertions, 13 deletions
diff --git a/payloads/libpayload/drivers/serial.c b/payloads/libpayload/drivers/serial.c
index cce43ca2fe..95f5b4855e 100644
--- a/payloads/libpayload/drivers/serial.c
+++ b/payloads/libpayload/drivers/serial.c
@@ -32,32 +32,36 @@
#include <libpayload.h>
#define IOBASE lib_sysinfo.ser_ioport
+#define DIVISOR(x) (115200 / x)
-#ifdef CONFIG_SERIAL_SET_SPEED
-#define DIVISOR (115200 / CONFIG_SERIAL_BAUD_RATE)
-#endif
-
-void serial_init(void)
+void serial_hardware_init(int port, int speed, int word_bits, int parity, int stop_bits)
{
-#ifdef CONFIG_SERIAL_SET_SPEED
unsigned char reg;
+ /* We will assume 8n1 for now. Does anyone use anything else these days? */
+
/* Disable interrupts. */
- outb(0, IOBASE + 0x01);
+ outb(0, port + 0x01);
/* Assert RTS and DTR. */
- outb(3, IOBASE + 0x04);
+ outb(3, port + 0x04);
/* Set the divisor latch. */
- reg = inb(IOBASE + 0x03);
- outb(reg | 0x80, IOBASE + 0x03);
+ reg = inb(port + 0x03);
+ outb(reg | 0x80, port + 0x03);
/* Write the divisor. */
- outb(DIVISOR & 0xFF, IOBASE);
- outb(DIVISOR >> 8 & 0xFF, IOBASE + 1);
+ outb(DIVISOR(speed) & 0xFF, port);
+ outb(DIVISOR(speed) >> 8 & 0xFF, port + 1);
/* Restore the previous value of the divisor. */
- outb(reg &= ~0x80, IOBASE + 0x03);
+ outb(reg &= ~0x80, port + 0x03);
+}
+
+void serial_init(void)
+{
+#ifdef CONFIG_SERIAL_SET_SPEED
+ serial_hardware_init(IOBASE, CONFIG_SERIAL_BAUD_RATE, 8, 0, 1);
#endif
}
@@ -81,9 +85,17 @@ int serial_getchar(void)
/* These are thinly veiled vt100 functions used by curses */
#define VT100_CLEAR "\e[H\e[J"
+/* These defines will fail if you use bold and reverse at the same time.
+ * Switching off one of them will switch off both. tinycurses knows about
+ * this and does the right thing.
+ */
#define VT100_SBOLD "\e[1m"
#define VT100_EBOLD "\e[m"
+#define VT100_SREVERSE "\e[7m"
+#define VT100_EREVERSE "\e[m"
#define VT100_CURSOR_ADDR "\e[%d;%dH"
+#define VT100_CURSOR_ON "\e[?25l"
+#define VT100_CURSOR_OFF "\e[?25h"
/* The following smacs/rmacs are actually for xterm; a real vt100 has
enacs=\E(B\E)0, smacs=^N, rmacs=^O. */
#define VT100_SMACS "\e(0"
@@ -112,6 +124,16 @@ void serial_end_bold(void)
serial_putcmd(VT100_EBOLD);
}
+void serial_start_reverse(void)
+{
+ serial_putcmd(VT100_SREVERSE);
+}
+
+void serial_end_reverse(void)
+{
+ serial_putcmd(VT100_EREVERSE);
+}
+
void serial_start_altcharset(void)
{
serial_putcmd(VT100_SMACS);
@@ -141,3 +163,11 @@ void serial_set_cursor(int y, int x)
snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1);
serial_putcmd(buffer);
}
+
+void serial_cursor_enable(int state)
+{
+ if (state)
+ serial_putcmd(VT100_CURSOR_ON);
+ else
+ serial_putcmd(VT100_CURSOR_OFF);
+}