GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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
This commit is contained in:
Roger Zauner 2007-05-09 17:54:25 +00:00 committed by Uwe Hermann
parent a59a7788b4
commit a846a5effc
1 changed files with 16 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/superio/winbond/w83977tf/w83977tf_early_serial.c
View File

@ -1,11 +1,25 @@
#include <arch/romcc_io.h>
#include "w83977tf.h"
static void w83977tf_enable_serial(device_t dev, unsigned iobase)
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 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);
}