2 * This file is part of the LinuxBIOS project.
4 * Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <arch/romcc_io.h>
22 #include <device/device.h>
25 /* The base address is 0x2e or 0x4e, depending on config bytes. */
27 #define SIO_INDEX SIO_BASE
28 #define SIO_DATA SIO_BASE+1
30 /* Global configuration registers. */
31 #define IT8716F_CONFIG_REG_CC 0x02 /* Configure Control (write-only). */
32 #define IT8716F_CONFIG_REG_LDN 0x07 /* Logical Device Number. */
33 #define IT8716F_CONFIG_REG_CONFIGSEL 0x22 /* Configuration Select. */
34 #define IT8716F_CONFIG_REG_CLOCKSEL 0x23 /* Clock Selection. */
35 #define IT8716F_CONFIG_REG_SWSUSP 0x24 /* Software Suspend, Flash I/F. */
37 #define IT8716F_CONFIGURATION_PORT 0x2e /* Write-only. */
39 /* The content of IT8716F_CONFIG_REG_LDN (index 0x07) must be set to the
40 LDN the register belongs to, before you can access the register. */
41 static void it8716f_sio_write(uint8_t ldn, uint8_t index, uint8_t value)
43 outb(IT8716F_CONFIG_REG_LDN, SIO_BASE);
45 outb(index, SIO_BASE);
46 outb(value, SIO_DATA);
49 /* Enable the peripheral devices on the IT8716F Super I/O chip. */
50 static void it8716f_enable_serial(device_t dev, unsigned iobase)
52 /* (1) Enter the configuration state (MB PnP mode). */
54 /* Perform MB PnP setup to put the SIO chip at 0x2e. */
55 /* Base address 0x2e: 0x87 0x01 0x55 0x55. */
56 /* Base address 0x4e: 0x87 0x01 0x55 0xaa. */
57 outb(0x87, IT8716F_CONFIGURATION_PORT);
58 outb(0x01, IT8716F_CONFIGURATION_PORT);
59 outb(0x55, IT8716F_CONFIGURATION_PORT);
60 outb(0x55, IT8716F_CONFIGURATION_PORT);
62 /* (2) Modify the data of configuration registers. */
64 /* Select the chip to configure (if there's more than one).
65 Set bit 7 to select JP3=1, clear bit 7 to select JP3=0.
66 If this register is not written, both chips are configured. */
67 /* it8716f_sio_write(0x00, IT8716F_CONFIG_REG_CONFIGSEL, 0x00); */
69 /* Enable all devices. */
70 it8716f_sio_write(IT8716F_FDC, 0x30, 0x1); /* Floppy */
71 it8716f_sio_write(IT8716F_SP1, 0x30, 0x1); /* Serial port 1 */
72 it8716f_sio_write(IT8716F_SP2, 0x30, 0x1); /* Serial port 2 */
73 it8716f_sio_write(IT8716F_PP, 0x30, 0x1); /* Parallel port */
74 it8716f_sio_write(IT8716F_EC, 0x30, 0x1); /* Environment controller */
75 it8716f_sio_write(IT8716F_KBCK, 0x30, 0x1); /* Keyboard */
76 it8716f_sio_write(IT8716F_KBCM, 0x30, 0x1); /* Mouse */
77 it8716f_sio_write(IT8716F_MIDI, 0x30, 0x1); /* MIDI port */
78 it8716f_sio_write(IT8716F_GAME, 0x30, 0x1); /* GAME port */
79 it8716f_sio_write(IT8716F_IR, 0x30, 0x1); /* Consumer IR */
81 /* Select 24MHz/48MHz CLKIN (set/clear bit 0). TODO: Needed? */
82 /* it8716f_sio_write(0x00, IT8716F_CONFIG_REG_CLOCKSEL, 0x01); */
84 /* Clear software suspend mode (clear bit 0). TODO: Needed? */
85 /* it8716f_sio_write(0x00, IT8716F_CONFIG_REG_SWSUSP, 0x00); */
87 /* (3) Exit the configuration state (MB PnP mode). */
88 it8716f_sio_write(0x00, IT8716F_CONFIG_REG_CC, 0x02);