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sio/winbond/common: Add function to configure pin mux 

Certain mainboards require SuperIO pinmux configuration before
peripherals will become operational.  Allow each mainboard to
configure the pinmux(es) of Winbond chips if needed.

Change-Id: Ice19f8d8514b66b15920a5b893700d636ed75cec
Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
Reviewed-on: https://review.coreboot.org/14960
Tested-by: build bot (Jenkins)
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Timothy Pearson 2016-05-24 15:48:50 -05:00
parent 161d2334e8
commit e4cca16b42
2 changed files with 15 additions and 1 deletions
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13
src/superio/winbond/common/early_serial.c
View File

@ -66,3 +66,16 @@ void winbond_enable_serial(pnp_devfn_t dev, u16 iobase)
pnp_set_enable(dev, 1); pnp_set_enable(dev, 1);
pnp_exit_conf_state(dev); pnp_exit_conf_state(dev);
} }
void winbond_set_pinmux(pnp_devfn_t dev, uint8_t offset, uint8_t mask, uint8_t state)
{
uint8_t byte;
/* Configure pin mux */
pnp_enter_conf_state(dev);
byte = pnp_read_config(dev, offset);
byte &= ~mask;
byte |= state;
pnp_write_config(dev, offset, byte);
pnp_exit_conf_state(dev);
}

3
src/superio/winbond/common/winbond.h
View File

@ -20,7 +20,8 @@
#include <arch/io.h> #include <arch/io.h>
#include <stdint.h> #include <stdint.h>
void winbond_enable_serial(pnp_devfn_t dev, u16 iobase); void winbond_enable_serial(pnp_devfn_t dev, uint16_t iobase);
void winbond_set_pinmux(pnp_devfn_t dev, uint8_t offset, uint8_t mask, uint8_t state);
void pnp_enter_conf_state(pnp_devfn_t dev); void pnp_enter_conf_state(pnp_devfn_t dev);
void pnp_exit_conf_state(pnp_devfn_t dev); void pnp_exit_conf_state(pnp_devfn_t dev);