diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/superio/ite/it8718f/it8718f_early_serial.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/src/superio/ite/it8718f/it8718f_early_serial.c b/src/superio/ite/it8718f/it8718f_early_serial.c index 35250ed643..f4fa04ef23 100644 --- a/src/superio/ite/it8718f/it8718f_early_serial.c +++ b/src/superio/ite/it8718f/it8718f_early_serial.c @@ -45,10 +45,9 @@ static void it8718f_sio_write(uint8_t ldn, uint8_t index, uint8_t value) outb(value, SIO_DATA); } -/* Enable the peripheral devices on the IT8718F Super I/O chip. */ -static void it8718f_enable_serial(device_t dev, unsigned iobase) +static void it8718f_enter_conf(void) { - /* (1) Enter the configuration state (MB PnP mode). */ + /* Enter the configuration state (MB PnP mode). */ /* Perform MB PnP setup to put the SIO chip at 0x2e. */ /* Base address 0x2e: 0x87 0x01 0x55 0x55. */ @@ -57,6 +56,29 @@ static void it8718f_enable_serial(device_t dev, unsigned iobase) outb(0x01, IT8718F_CONFIGURATION_PORT); outb(0x55, IT8718F_CONFIGURATION_PORT); outb(0x55, IT8718F_CONFIGURATION_PORT); +} + +static void it8718f_exit_conf(void) +{ + /* Exit the configuration state (MB PnP mode). */ + it8718f_sio_write(0x00, IT8718F_CONFIG_REG_CC, 0x02); +} + +static void it8718f_24mhz_clkin(void) +{ + it8718f_enter_conf(); + + /* Select 24MHz CLKIN (48MHZ default)*/ + it8718f_sio_write(0x00, IT8718F_CONFIG_REG_CLOCKSEL, 0x1); + + it8718f_exit_conf(); +} + +/* Enable the peripheral devices on the IT8718F Super I/O chip. */ +static void it8718f_enable_serial(device_t dev, unsigned iobase) +{ + /* (1) Enter the configuration state (MB PnP mode). */ + it8718f_enter_conf(); /* (2) Modify the data of configuration registers. */ @@ -65,17 +87,14 @@ static void it8718f_enable_serial(device_t dev, unsigned iobase) If this register is not written, both chips are configured. */ /* it8718f_sio_write(0x00, IT8718F_CONFIG_REG_CONFIGSEL, 0x00); */ - /* Enable all devices. */ + /* Enable serial port(s). */ it8718f_sio_write(IT8718F_SP1, 0x30, 0x1); /* Serial port 1 */ it8718f_sio_write(IT8718F_SP2, 0x30, 0x1); /* Serial port 2 */ - /* Select 24MHz CLKIN (set bit 0). */ - it8718f_sio_write(0x00, IT8718F_CONFIG_REG_CLOCKSEL, 0x01); - /* Clear software suspend mode (clear bit 0). TODO: Needed? */ /* it8718f_sio_write(0x00, IT8718F_CONFIG_REG_SWSUSP, 0x00); */ /* (3) Exit the configuration state (MB PnP mode). */ - it8718f_sio_write(0x00, IT8718F_CONFIG_REG_CC, 0x02); + it8718f_exit_conf(); } |