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authorJordan Crouse <jordan.crouse@amd.com>2008-04-25 23:09:39 +0000
committerJordan Crouse <jordan.crouse@amd.com>2008-04-25 23:09:39 +0000
commit63f181f97c0b89f5fe80f96df7b6288a59f5ad42 (patch)
tree94b8ac341edc88512413adf32922469156c7b268 /payloads/libpayload/drivers/keyboard.c
parent24a040475918ad2977a52677f59b10f7ce085afc (diff)
downloadcoreboot-63f181f97c0b89f5fe80f96df7b6288a59f5ad42.tar.xz
libpayload: Enable keyboard translation so that we can use scancode set 1
The qemu keyboard controller defaults to using scancode set 2, we use set 1. Turn on the translate mode in the keyboard controller to force the issue. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Acked-by: Peter Stuge <peter@stuge.se> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3270 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'payloads/libpayload/drivers/keyboard.c')
-rw-r--r--payloads/libpayload/drivers/keyboard.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/keyboard.c b/payloads/libpayload/drivers/keyboard.c
index 1049b9ccec..540936dae5 100644
--- a/payloads/libpayload/drivers/keyboard.c
+++ b/payloads/libpayload/drivers/keyboard.c
@@ -29,6 +29,11 @@
#include <libpayload.h>
+#define I8042_CMD_READ_MODE 0x20
+#define I8042_CMD_WRITE_MODE 0x60
+
+#define I8042_MODE_XLATE 0x40
+
unsigned char map[2][0x57] = {
{
0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
@@ -118,3 +123,54 @@ int keyboard_getchar(void)
return ret;
}
+
+static int keyboard_wait_read(void)
+{
+ int timeout = 10000;
+
+ while(timeout-- && !(inb(0x64) & 0x01))
+ udelay(50);
+
+ return (timeout <= 0) ? -1 : 0;
+}
+
+static int keyboard_wait_write(void)
+{
+ int timeout = 10000;
+
+ while(timeout-- && (inb(0x64) & 0x02))
+ udelay(50);
+
+ return (timeout <= 0) ? -1 : 0;
+}
+
+static unsigned char keyboard_get_mode(void)
+{
+ outb(I8042_CMD_READ_MODE, 0x64);
+ keyboard_wait_read();
+ return inb(0x60);
+}
+
+static void keyboard_set_mode(unsigned char mode)
+{
+ outb(I8042_CMD_WRITE_MODE, 0x64);
+ keyboard_wait_write();
+ outb(mode, 0x60);
+}
+
+void keyboard_init(void)
+{
+ u8 mode;
+
+ /* Read the current mode */
+ mode = keyboard_get_mode();
+
+ /* Turn on scancode translate mode so that we can
+ use the scancode set 1 tables */
+
+ mode |= I8042_MODE_XLATE;
+
+ /* Write the new mode */
+ keyboard_set_mode(mode);
+}
+