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authorRoger Zauner <roger@eskimo.com>2007-05-09 17:54:25 +0000
committerUwe Hermann <uwe@hermann-uwe.de>2007-05-09 17:54:25 +0000
commita846a5effcf46afac9f65df49ce5350b36dc1096 (patch)
tree4eed10b2f2fa16681aeb4db09d7753aece492733 /src
parenta59a7788b49ceb52571093667a595566691061ed (diff)
The superio needs 0x87 sent twice to 0x3f0 to enable extended function
(power-on strapping). Although this is already done in superio.c, it's not being done when w83977tf_early_serial.c is executed. As such, no console_init() without it. Signed-off-by: Roger Zauner <roger@eskimo.com> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2645 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src')
-rw-r--r--src/superio/winbond/w83977tf/w83977tf_early_serial.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/src/superio/winbond/w83977tf/w83977tf_early_serial.c b/src/superio/winbond/w83977tf/w83977tf_early_serial.c
index fffc16d430..a956e11fc5 100644
--- a/src/superio/winbond/w83977tf/w83977tf_early_serial.c
+++ b/src/superio/winbond/w83977tf/w83977tf_early_serial.c
@@ -1,11 +1,25 @@
#include <arch/romcc_io.h>
#include "w83977tf.h"
+static inline void pnp_enter_ext_func_mode(device_t dev)
+{
+ unsigned int port = dev >> 8;
+ outb(0x87, port);
+ outb(0x87, port);
+}
+
+static void pnp_exit_ext_func_mode(device_t dev)
+{
+ unsigned int port = dev >> 8;
+ outb(0xaa, port);
+}
-static void w83977tf_enable_serial(device_t dev, unsigned iobase)
+static void w83977tf_enable_serial(device_t dev, unsigned int iobase)
{
+ pnp_enter_ext_func_mode(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_enable(dev, 1);
+ pnp_exit_ext_func_mode(dev);
}