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>
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@ -66,3 +66,16 @@ void winbond_enable_serial(pnp_devfn_t dev, u16 iobase)
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pnp_set_enable(dev, 1);
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pnp_exit_conf_state(dev);
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}
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void winbond_set_pinmux(pnp_devfn_t dev, uint8_t offset, uint8_t mask, uint8_t state)
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{
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uint8_t byte;
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/* Configure pin mux */
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pnp_enter_conf_state(dev);
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byte = pnp_read_config(dev, offset);
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byte &= ~mask;
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byte |= state;
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pnp_write_config(dev, offset, byte);
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pnp_exit_conf_state(dev);
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}
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@ -20,7 +20,8 @@
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#include <arch/io.h>
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#include <stdint.h>
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void winbond_enable_serial(pnp_devfn_t dev, u16 iobase);
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void winbond_enable_serial(pnp_devfn_t dev, uint16_t iobase);
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void winbond_set_pinmux(pnp_devfn_t dev, uint8_t offset, uint8_t mask, uint8_t state);
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void pnp_enter_conf_state(pnp_devfn_t dev);
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void pnp_exit_conf_state(pnp_devfn_t dev);
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