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| author | Marc Jones <marc.jones@amd.com> | 2008-09-23 22:19:27 +0000 |
|---|---|---|
| committer | Marc Jones <marc.jones@amd.com> | 2008-09-23 22:19:27 +0000 |
| commit | 3aca4b5734e13dc5a40d238421be8c0f072ee552 (patch) | |
| tree | 6f1b98f3b90dca3aebda680f02f11c5c4feb435e /src/superio | |
| parent | 0f4282b538213c17913821bc8e84877074838edf (diff) | |
| download | coreboot-3aca4b5734e13dc5a40d238421be8c0f072ee552.tar.xz | |
The AMD dbm690t mainboard uses the it8712f SIO with the
default 48MHz clock input. The Asus a8n_e uses the it8712f
with a 24MHz clock input. The it8712f early init code was
setting a 24MHz input clock(to support the a8n_e).
Since 48Mhz is the default I added a function to set 24MHz
input clock to the a8n_e.
Signed-off-by: Marc Jones <marc.jones@amd.com>
Acked-by: Rudolf Marek <r.marek@assembler.cz>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3594 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/superio')
| -rw-r--r-- | src/superio/ite/it8712f/it8712f_early_serial.c | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/src/superio/ite/it8712f/it8712f_early_serial.c b/src/superio/ite/it8712f/it8712f_early_serial.c index 7839732787..dd84245dc4 100644 --- a/src/superio/ite/it8712f/it8712f_early_serial.c +++ b/src/superio/ite/it8712f/it8712f_early_serial.c @@ -45,10 +45,10 @@ static void it8712f_sio_write(uint8_t ldn, uint8_t index, uint8_t value) outb(value, SIO_DATA); } -/* Enable the peripheral devices on the IT8712F Super I/O chip. */ -static void it8712f_enable_serial(device_t dev, unsigned iobase) + +static void it8712f_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 +57,32 @@ static void it8712f_enable_serial(device_t dev, unsigned iobase) outb(0x01, IT8712F_CONFIGURATION_PORT); outb(0x55, IT8712F_CONFIGURATION_PORT); outb(0x55, IT8712F_CONFIGURATION_PORT); +} + +static void it8712f_exit_conf(void) +{ + /* Exit the configuration state (MB PnP mode). */ + it8712f_sio_write(0x00, IT8712F_CONFIG_REG_CC, 0x02); +} + + +static void it8712f_24mhz_clkin(void) +{ + it8712f_enter_conf(); + + /* Select 24MHz CLKIN (48MHZ default)*/ + it8712f_sio_write(0x00, IT8712F_CONFIG_REG_CLOCKSEL, 0x1); + + it8712f_exit_conf(); + +} + +/* Enable the peripheral devices on the IT8712F Super I/O chip. */ +static void it8712f_enable_serial(device_t dev, unsigned iobase) +{ + + /* (1) Enter the configuration state (MB PnP mode). */ + it8712f_enter_conf(); /* (2) Modify the data of configuration registers. */ @@ -69,13 +95,9 @@ static void it8712f_enable_serial(device_t dev, unsigned iobase) it8712f_sio_write(IT8712F_SP1, 0x30, 0x1); /* Serial port 1 */ it8712f_sio_write(IT8712F_SP2, 0x30, 0x1); /* Serial port 2 */ - /* Select 24MHz CLKIN (set bit 0). */ - it8712f_sio_write(0x00, IT8712F_CONFIG_REG_CLOCKSEL, 0x01); - /* Clear software suspend mode (clear bit 0). TODO: Needed? */ /* it8712f_sio_write(0x00, IT8712F_CONFIG_REG_SWSUSP, 0x00); */ /* (3) Exit the configuration state (MB PnP mode). */ - it8712f_sio_write(0x00, IT8712F_CONFIG_REG_CC, 0x02); + it8712f_exit_conf(); } - |