| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2009 coresystems GmbH |
| * |
| * 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 |
| */ |
| |
| /* |
| * Enable the serial devices on the VIA CX700 |
| */ |
| |
| #include <arch/io.h> |
| |
| static void cx700_writepnpaddr(u8 val) |
| { |
| outb(val, 0x2e); |
| outb(val, 0xeb); |
| } |
| |
| static void cx700_writepnpdata(u8 val) |
| { |
| outb(val, 0x2f); |
| outb(val, 0xeb); |
| } |
| |
| static void cx700_writesiobyte(u16 reg, u8 val) |
| { |
| outb(val, reg); |
| } |
| |
| static void cx700_writesioword(u16 reg, u16 val) |
| { |
| outw(val, reg); |
| } |
| |
| static void enable_cx700_serial(void) |
| { |
| post_code(0x06); |
| |
| // WTH? |
| outb(0x03, 0x22); |
| |
| // Set UART1 I/O Base Address |
| pci_write_config8(PCI_DEV(0, 17, 0), 0xb4, 0x7e); |
| |
| // UART1 Enable |
| pci_write_config8(PCI_DEV(0, 17, 0), 0xb0, 0x10); |
| |
| // turn on pnp |
| cx700_writepnpaddr(0x87); |
| cx700_writepnpaddr(0x87); |
| // now go ahead and set up com1. |
| // set address |
| cx700_writepnpaddr(0x7); |
| cx700_writepnpdata(0x2); |
| // enable serial out |
| cx700_writepnpaddr(0x30); |
| cx700_writepnpdata(0x1); |
| // serial port 1 base address (FEh) |
| cx700_writepnpaddr(0x60); |
| cx700_writepnpdata(0xfe); |
| // serial port 1 IRQ (04h) |
| cx700_writepnpaddr(0x70); |
| cx700_writepnpdata(0x4); |
| // serial port 1 control |
| cx700_writepnpaddr(0xf0); |
| cx700_writepnpdata(0x2); |
| // turn of pnp |
| cx700_writepnpaddr(0xaa); |
| |
| // XXX This part should be fully taken care of by |
| // src/lib/uart8250.c:uart_init |
| |
| // set up reg to set baud rate. |
| cx700_writesiobyte(0x3fb, 0x80); |
| // Set 115 kb |
| cx700_writesioword(0x3f8, 1); |
| // Set 9.6 kb |
| // cx700_writesioword(0x3f8, 12) |
| // now set no parity, one stop, 8 bits |
| cx700_writesiobyte(0x3fb, 3); |
| // now turn on RTS, DRT |
| cx700_writesiobyte(0x3fc, 3); |
| // Enable interrupts |
| cx700_writesiobyte(0x3f9, 0xf); |
| // should be done. Dump a char for fun. |
| cx700_writesiobyte(0x3f8, 48); |
| |
| post_code(0x07); |
| } |