2 * lpc47m10x_early_serial.c: Pre-RAM driver for SMSC LPC47M10X2 Super I/O chip
3 * derived from lpc47n217
5 * Copyright (C) 2005 Digital Design Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <arch/romcc_io.h>
23 #include "lpc47m10x.h"
26 * Function: pnp_enter_conf_state
27 * Parameters: dev - high 8 bits = Super I/O port
29 * Description: Enable access to the LPC47M10X2's configuration registers.
31 static inline void pnp_enter_conf_state(device_t dev)
33 unsigned port = dev>>8;
38 * Function: pnp_exit_conf_state
39 * Parameters: dev - high 8 bits = Super I/O port
41 * Description: Disable access to the LPC47M10X2's configuration registers.
43 static void pnp_exit_conf_state(device_t dev)
45 unsigned port = dev>>8;
50 * Function: lpc47m10x_enable_serial
51 * Parameters: dev - high 8 bits = Super I/O port,
52 * low 8 bits = logical device number (per lpc47m10x.h)
53 * iobase - processor I/O port address to assign to this serial device
55 * Description: Configure the base I/O port of the specified serial device
56 * and enable the serial device.
58 static void lpc47m10x_enable_serial(device_t dev, unsigned iobase)
60 pnp_enter_conf_state(dev);
61 pnp_set_logical_device(dev);
62 pnp_set_enable(dev, 0);
63 pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
64 pnp_set_enable(dev, 1);
65 pnp_exit_conf_state(dev);