| /* |
| * lpc47m10x_early_serial.c: Pre-RAM driver for SMSC LPC47M10X2 Super I/O chip |
| * derived from lpc47n217 |
| * |
| * Copyright (C) 2005 Digital Design Corporation |
| * |
| * 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; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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 |
| */ |
| |
| #include <arch/romcc_io.h> |
| #include "lpc47m10x.h" |
| |
| //---------------------------------------------------------------------------------- |
| // Function: pnp_enter_conf_state |
| // Parameters: dev - high 8 bits = Super I/O port |
| // Return Value: None |
| // Description: Enable access to the LPC47M10X2's configuration registers. |
| // |
| static inline void pnp_enter_conf_state(device_t dev) { |
| unsigned port = dev>>8; |
| outb(0x55, port); |
| } |
| |
| //---------------------------------------------------------------------------------- |
| // Function: pnp_exit_conf_state |
| // Parameters: dev - high 8 bits = Super I/O port |
| // Return Value: None |
| // Description: Disable access to the LPC47M10X2's configuration registers. |
| // |
| static void pnp_exit_conf_state(device_t dev) { |
| unsigned port = dev>>8; |
| outb(0xaa, port); |
| } |
| |
| //---------------------------------------------------------------------------------- |
| // Function: lpc47b272_enable_serial |
| // Parameters: dev - high 8 bits = Super I/O port, |
| // low 8 bits = logical device number (per lpc47b272.h) |
| // iobase - processor I/O port address to assign to this serial device |
| // Return Value: bool |
| // Description: Configure the base I/O port of the specified serial device |
| // and enable the serial device. |
| // |
| static void lpc47b272_enable_serial(device_t dev, unsigned iobase) |
| { |
| pnp_enter_conf_state(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_conf_state(dev); |
| } |