diff options
Diffstat (limited to 'src/superio/smsc/sio1036/sio1036_early_init.c')
| -rw-r--r-- | src/superio/smsc/sio1036/sio1036_early_init.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/superio/smsc/sio1036/sio1036_early_init.c b/src/superio/smsc/sio1036/sio1036_early_init.c new file mode 100644 index 0000000000..980e8c5443 --- /dev/null +++ b/src/superio/smsc/sio1036/sio1036_early_init.c @@ -0,0 +1,101 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* Pre-RAM driver for the SMSC KBC1100 Super I/O chip */ + +#include <arch/romcc_io.h> +#include "sio1036.h" + +#ifndef CONFIG_TTYS0_BASE +#define CONFIG_TTYS0_BASE 0x3F8 +#endif +static inline void sio1036_enter_conf_state(device_t dev) +{ + unsigned port = dev>>8; + outb(0x55, port); +} + +static inline void sio1036_exit_conf_state(device_t dev) +{ + unsigned port = dev>>8; + outb(0xaa, port); +} + +static u8 detect_sio1036_chip(unsigned port) +{ + device_t dev; + dev = PNP_DEV (port, SIO1036_SP1); + unsigned data; + sio1036_enter_conf_state (dev); + data = pnp_read_config (dev, 0x0D); + sio1036_exit_conf_state(dev); + /* detect smsc sio1036 chip */ + if (data == 0x82) { + /* Found SMSC SIO1036 chip */ + return 0; + } + else { + return -1; + }; +} + +static inline void sio1036_early_init(unsigned port) +{ + device_t dev; + dev = PNP_DEV (port, SIO1036_SP1); + + if (detect_sio1036_chip(port) != 0) { + /* Not found SMSC SIO1036 */ + return; + } + sio1036_enter_conf_state (dev); + + /* Enable SMSC UART 0 */ + /* Valid configuration cycle */ + pnp_write_config (dev, 0x00, 0x28); + + /* PP power/mode/cr lock */ + pnp_write_config (dev, 0x01, 0x98 | LPT_POWER_DOWN); + pnp_write_config (dev, 0x02, 0x08 | UART_POWER_DOWN); + + /*Auto power management*/ + pnp_write_config (dev, 0x07, 0x00 ); + + /*ECP FIFO threhod */ + pnp_write_config (dev, 0x0A, 0x00 | IR_OUPUT_MUX); + + /*GPIO direction register 2 */ + pnp_write_config (dev, 0x033, 0x00); + + /*UART Mode */ + pnp_write_config (dev, 0x0C, 0x02); + + /* GPIO polarity regisgter 2 */ + pnp_write_config (dev, 0x034, 0x00); + + /* Enable SMSC UART 0 */ + /*Set base io address */ + pnp_write_config (dev, 0x25, (u8)((u16)CONFIG_TTYS0_BASE >> 2)); + + /* Set UART IRQ onto 0x04 */ + pnp_write_config (dev, 0x28, 0x04); + + sio1036_exit_conf_state(dev); +} + |