4 * lpc47m10x_early_serial.c: Pre-RAM driver for SMSC LPC47M10X2 Super I/O chip
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5 * derived from lpc47n217
7 * Copyright (C) 2005 Digital Design Corporation
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU General Public License as published by
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11 * the Free Software Foundation; either version 2 of the License, or
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12 * (at your option) any later version.
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14 * This program is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 * GNU General Public License for more details.
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19 * You should have received a copy of the GNU General Public License
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20 * along with this program; if not, write to the Free Software
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21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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27 #include <arch/romcc_io.h>
28 #include "lpc47m10x.h"
30 //----------------------------------------------------------------------------------
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31 // Function: pnp_enter_conf_state
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32 // Parameters: dev - high 8 bits = Super I/O port
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33 // Return Value: None
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34 // Description: Enable access to the LPC47M10X2's configuration registers.
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36 static inline void pnp_enter_conf_state(device_t dev) {
37 unsigned port = dev>>8;
41 //----------------------------------------------------------------------------------
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42 // Function: pnp_exit_conf_state
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43 // Parameters: dev - high 8 bits = Super I/O port
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44 // Return Value: None
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45 // Description: Disable access to the LPC47M10X2's configuration registers.
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47 static void pnp_exit_conf_state(device_t dev) {
48 unsigned port = dev>>8;
52 //----------------------------------------------------------------------------------
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53 // Function: lpc47b272_enable_serial
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54 // Parameters: dev - high 8 bits = Super I/O port,
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55 // low 8 bits = logical device number (per lpc47b272.h)
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56 // iobase - processor I/O port address to assign to this serial device
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57 // Return Value: bool
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58 // Description: Configure the base I/O port of the specified serial device
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59 // and enable the serial device.
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61 static void lpc47b272_enable_serial(device_t dev, unsigned iobase)
63 pnp_enter_conf_state(dev);
64 pnp_set_logical_device(dev);
65 pnp_set_enable(dev, 0);
66 pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
67 pnp_set_enable(dev, 1);
68 pnp_exit_conf_state(dev);