diff options
Diffstat (limited to 'src/superio/ite/it8661f/it8661f_early_serial.c')
| -rw-r--r-- | src/superio/ite/it8661f/it8661f_early_serial.c | 103 |
1 files changed, 44 insertions, 59 deletions
diff --git a/src/superio/ite/it8661f/it8661f_early_serial.c b/src/superio/ite/it8661f/it8661f_early_serial.c index b3a344a7d8..c3edddcf4b 100644 --- a/src/superio/ite/it8661f/it8661f_early_serial.c +++ b/src/superio/ite/it8661f/it8661f_early_serial.c @@ -21,74 +21,59 @@ #include <arch/romcc_io.h> #include "it8661f.h" -/* The base address is 0x3f0, 0x3bd, or 0x370, depending on config bytes. */ -#define SIO_BASE 0x3f0 -#define SIO_INDEX SIO_BASE -#define SIO_DATA (SIO_BASE + 1) +/* Perform MB PnP setup to put the SIO chip at 0x3f0. */ +/* Base address 0x3f0: 0x86 0x80 0x55 0x55. */ +/* Base address 0x3bd: 0x86 0x80 0x55 0xaa. */ +/* Base address 0x370: 0x86 0x80 0xaa 0x55. */ +static void pnp_enter_ext_func_mode(device_t dev) +{ + int i; + u16 port = dev >> 8; + + /* TODO: Don't hardcode Super I/O config port to 0x3f0. */ + outb(0x86, IT8661F_ISA_PNP_PORT); + outb(0x80, IT8661F_ISA_PNP_PORT); + outb(0x55, IT8661F_ISA_PNP_PORT); + outb(0x55, IT8661F_ISA_PNP_PORT); -/* Global configuration registers. */ -#define IT8661F_CONFIG_REG_CC 0x02 /* Configure Control (write-only). */ -#define IT8661F_CONFIG_REG_LDN 0x07 /* Logical Device Number. */ -#define IT8661F_CONFIG_REG_LDE 0x23 /* PnP Logical Device Enable. */ -#define IT8661F_CONFIG_REG_SWSUSP 0x24 /* Software Suspend + Clock Select. */ + /* Sequentially write the 32 special values. */ + for (i = 0; i < 32; i++) + outb(init_values[i], port); +} -#define IT8661F_CONFIGURATION_PORT 0x0279 /* Write-only. */ +static void pnp_exit_ext_func_mode(device_t dev) +{ + pnp_write_config(dev, IT8661F_REG_CC, (1 << 1)); +} /* - * Special values used for entering MB PnP mode. The first four bytes of - * each line determine the address port, the last four are data. + * The logical devices will only be involved in the ISA PnP sequence if their + * respective enable bits in IT8661F_REG_LDE are set. + * + * TODO: Find out if we actually need this (we use MB PnP mode). + * + * Bits: FDC (0), Com1 (1), Com2 (2), PP (3), IR (4). Bits 5-7 are reserved. */ -static const u8 init_values[] = { - 0x6a, 0xb5, 0xda, 0xed, /**/ 0xf6, 0xfb, 0x7d, 0xbe, - 0xdf, 0x6f, 0x37, 0x1b, /**/ 0x0d, 0x86, 0xc3, 0x61, - 0xb0, 0x58, 0x2c, 0x16, /**/ 0x8b, 0x45, 0xa2, 0xd1, - 0xe8, 0x74, 0x3a, 0x9d, /**/ 0xce, 0xe7, 0x73, 0x39, -}; +static void it8661f_enable_logical_devices(device_t dev) +{ + pnp_enter_ext_func_mode(dev); + pnp_write_config(dev, IT8661F_REG_LDE, 0x1f); + pnp_exit_ext_func_mode(dev); +} -static void it8661f_sio_write(u8 ldn, u8 index, u8 value) +static void it8661f_set_clkin(device_t dev, u8 clkin) { - outb(IT8661F_CONFIG_REG_LDN, SIO_BASE); - outb(ldn, SIO_DATA); - outb(index, SIO_BASE); - outb(value, SIO_DATA); + pnp_enter_ext_func_mode(dev); + pnp_write_config(dev, IT8661F_REG_SWSUSP, (clkin << 1)); + pnp_exit_ext_func_mode(dev); } -/* Enable the serial port(s). */ static void it8661f_enable_serial(device_t dev, u16 iobase) { - int i; - - /* (1) Enter the configuration state (MB PnP mode). */ - - /* Perform MB PnP setup to put the SIO chip at 0x3f0. */ - /* Base address 0x3f0: 0x86 0x80 0x55 0x55. */ - /* Base address 0x3bd: 0x86 0x80 0x55 0xaa. */ - /* Base address 0x370: 0x86 0x80 0xaa 0x55. */ - outb(0x86, IT8661F_CONFIGURATION_PORT); - outb(0x80, IT8661F_CONFIGURATION_PORT); - outb(0x55, IT8661F_CONFIGURATION_PORT); - outb(0x55, IT8661F_CONFIGURATION_PORT); - - /* Sequentially write the 32 special values. */ - for (i = 0; i < 32; i++) - outb(init_values[i], SIO_BASE); - - /* (2) Modify the data of configuration registers. */ - - /* - * Allow all devices to be enabled. Bits: FDC (0), Com1 (1), Com2 (2), - * PP (3), IR (4). Bits 5-7 are reserved. - */ - it8661f_sio_write(0x00, IT8661F_CONFIG_REG_LDE, 0x1f); - - /* Enable serial port(s). */ - it8661f_sio_write(IT8661F_SP1, 0x30, 0x1); /* Serial port 1 */ - it8661f_sio_write(IT8661F_SP2, 0x30, 0x1); /* Serial port 2 */ - - /* Select 24MHz CLKIN (clear bit 1) and clear software suspend mode - (clear bit 0). */ - it8661f_sio_write(0x00, IT8661F_CONFIG_REG_SWSUSP, 0x00); - - /* (3) Exit the configuration state (MB PnP mode). */ - it8661f_sio_write(0x00, IT8661F_CONFIG_REG_CC, 0x02); + 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); } |