diff options
Diffstat (limited to 'src/superio/intel/i3100')
| -rw-r--r-- | src/superio/intel/i3100/i3100.h | 15 | ||||
| -rw-r--r-- | src/superio/intel/i3100/i3100_early_serial.c | 43 |
2 files changed, 38 insertions, 20 deletions
diff --git a/src/superio/intel/i3100/i3100.h b/src/superio/intel/i3100/i3100.h index f0d6426be0..6218e6d09f 100644 --- a/src/superio/intel/i3100/i3100.h +++ b/src/superio/intel/i3100/i3100.h @@ -46,6 +46,19 @@ #define I3100_SP2 0x05 /* Com2 */ #define I3100_WDT 0x06 /* Watchdog timer */ -#define I3100_SUPERIO_CONFIG_PORT 0x4e +/* Registers and bit definitions: */ + +#define I3100_SIW_CONFIGURATION 0x29 + +/* + * SIW_CONFIGURATION[3:2] = UART_CLK predivide + * 00: divide by 1 + * 01: divide by 8 + * 10: divide by 26 + * 11: reserved + */ +#define I3100_UART_CLK_PREDIVIDE_1 0x00 +#define I3100_UART_CLK_PREDIVIDE_8 0x01 +#define I3100_UART_CLK_PREDIVIDE_26 0x02 #endif diff --git a/src/superio/intel/i3100/i3100_early_serial.c b/src/superio/intel/i3100/i3100_early_serial.c index 74c20c537c..23f8cab5ab 100644 --- a/src/superio/intel/i3100/i3100_early_serial.c +++ b/src/superio/intel/i3100/i3100_early_serial.c @@ -21,31 +21,36 @@ #include <arch/romcc_io.h> #include "i3100.h" -static void i3100_sio_write(u8 port, u8 ldn, u8 index, u8 value) +static void pnp_enter_ext_func_mode(device_t dev) { - outb(0x07, port); - outb(ldn, port + 1); - outb(index, port); - outb(value, port + 1); -} + u16 port = dev >> 8; -static void i3100_enable_serial(u8 port, u8 ldn, u16 iobase) -{ - /* Enter configuration state. */ outb(0x80, port); outb(0x86, port); +} - /* Enable serial port. */ - i3100_sio_write(port, ldn, 0x30, 0x01); - - /* Set serial port I/O region. */ - i3100_sio_write(port, ldn, 0x60, (iobase >> 8) & 0xff); - i3100_sio_write(port, ldn, 0x61, iobase & 0xff); - - /* Enable device interrupts, set UART_CLK predivide to 26. */ - i3100_sio_write(port, 0x00, 0x29, 0x0b); +static void pnp_exit_ext_func_mode(device_t dev) +{ + u16 port = dev >> 8; - /* Exit configuration state. */ outb(0x68, port); outb(0x08, port); } + +/* Enable device interrupts, set UART_CLK predivide. */ +static void i3100_configure_uart_clk(device_t dev, u8 predivide) +{ + pnp_enter_ext_func_mode(dev); + pnp_write_config(dev, I3100_SIW_CONFIGURATION, (predivide << 2) | 1); + pnp_exit_ext_func_mode(dev); +} + +static void i3100_enable_serial(device_t dev, u16 iobase) +{ + pnp_enter_ext_func_mode(dev); + pnp_set_logical_device(dev); + pnp_set_enable(dev, 0); + pnp_set_iobase(dev, PNP_IDX_IO0, iobase); + pnp_set_enable(dev, 1); + pnp_exit_ext_func_mode(dev); +} |