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)
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@ -37,6 +37,17 @@ void pnp_exit_ext_func_mode(device_t dev)
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outb(0xaa, dev->path.pnp.port);
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}
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static void w83627dhg_enable_UR2(device_t dev)
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{
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u8 reg8;
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pnp_enter_ext_func_mode(dev);
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reg8 = pnp_read_config(dev, 0x2c);
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reg8 |= (0x3);
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pnp_write_config(dev, 0x2c, reg8); // Set pins 78-85-> UART B
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pnp_exit_ext_func_mode(dev);
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}
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static void w83627dhg_init(device_t dev)
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{
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struct superio_winbond_w83627dhg_config *conf = dev->chip_info;
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@ -45,6 +56,9 @@ static void w83627dhg_init(device_t dev)
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return;
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switch(dev->path.pnp.device) {
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case W83627DHG_SP2:
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w83627dhg_enable_UR2(dev);
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break;
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case W83627DHG_KBC:
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pc_keyboard_init(&conf->keyboard);
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break;
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