diff options
| author | Wolfgang Kamp <wmkamp@datakamp.de> | 2013-03-11 16:35:42 +0100 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-03-15 17:51:48 +0100 |
| commit | 9ae1eb6961b483c9905423fb113100a8038b4507 (patch) | |
| tree | 68d440ec8ed012778e4ef8404c41bd666d4e310a /src | |
| parent | 8d629c14eb776ce6e243218bb554a335dc0f3672 (diff) | |
Super I/O W83627DHG: Enable UART B by redirecting pins
Pins 78-85 are set to GPIO after power on or reset. To enable
UART B the pins must be redirected to it.
Look at W83627DHG databook version 1.4 page 185 Chip
(global) Control Register CR2C.
Change-Id: I12b094a60d9c5cb2447a553be4679a4605e19845
Signed-off-by: Wolfgang Kamp <wmkamp@datakamp.de>
Reviewed-on: http://review.coreboot.org/2626
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src')
| -rw-r--r-- | src/superio/winbond/w83627dhg/superio.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/superio/winbond/w83627dhg/superio.c b/src/superio/winbond/w83627dhg/superio.c index 26f2921300..bbde26a67e 100644 --- a/src/superio/winbond/w83627dhg/superio.c +++ b/src/superio/winbond/w83627dhg/superio.c @@ -37,6 +37,17 @@ void pnp_exit_ext_func_mode(device_t dev) outb(0xaa, dev->path.pnp.port); } +static void w83627dhg_enable_UR2(device_t dev) +{ + u8 reg8; + + pnp_enter_ext_func_mode(dev); + reg8 = pnp_read_config(dev, 0x2c); + reg8 |= (0x3); + pnp_write_config(dev, 0x2c, reg8); // Set pins 78-85-> UART B + pnp_exit_ext_func_mode(dev); +} + static void w83627dhg_init(device_t dev) { struct superio_winbond_w83627dhg_config *conf = dev->chip_info; @@ -45,6 +56,9 @@ static void w83627dhg_init(device_t dev) return; switch(dev->path.pnp.device) { + case W83627DHG_SP2: + w83627dhg_enable_UR2(dev); + break; case W83627DHG_KBC: pc_keyboard_init(&conf->keyboard); break; |