Viewing file:  lpc.c (3.74 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
*
* BRIEF MODULE DESCRIPTION
* ITE Semi IT8712 Super I/O functions.
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <asm/io.h>
#include <asm/types.h>
#include <asm/it8712.h>
#include <asm/it8172/it8172.h>
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
void LPCEnterMBPnP(void)
{
int i;
unsigned char key[4] = {0x87, 0x01, 0x55, 0x55};
for (i = 0; i<4; i++)
outb(key[i], LPC_KEY_ADDR);
}
void LPCExitMBPnP(void)
{
outb(0x02, LPC_KEY_ADDR);
outb(0x02, LPC_DATA_ADDR);
}
void LPCSetConfig(char LdnNumber, char Index, char data)
{
LPCEnterMBPnP(); // Enter IT8712 MB PnP mode
outb(0x07, LPC_KEY_ADDR);
outb(LdnNumber, LPC_DATA_ADDR);
outb(Index, LPC_KEY_ADDR);
outb(data, LPC_DATA_ADDR);
LPCExitMBPnP();
}
char LPCGetConfig(char LdnNumber, char Index)
{
char rtn;
LPCEnterMBPnP(); // Enter IT8712 MB PnP mode
outb(0x07, LPC_KEY_ADDR);
outb(LdnNumber, LPC_DATA_ADDR);
outb(Index, LPC_KEY_ADDR);
rtn = inb(LPC_DATA_ADDR);
LPCExitMBPnP();
return rtn;
}
int SearchIT8712(void)
{
unsigned char Id1, Id2;
unsigned short Id;
LPCEnterMBPnP();
outb(0x20, LPC_KEY_ADDR); /* chip id byte 1 */
Id1 = inb(LPC_DATA_ADDR);
outb(0x21, LPC_KEY_ADDR); /* chip id byte 2 */
Id2 = inb(LPC_DATA_ADDR);
Id = (Id1 << 8) | Id2;
LPCExitMBPnP();
if (Id == 0x8712)
return TRUE;
else
return FALSE;
}
void InitLPCInterface(void)
{
unsigned char bus, dev_fn;
unsigned long data;
bus = 0;
dev_fn = 1<<3 | 4;
/* pci cmd, SERR# Enable */
IT_WRITE(IT_CONFADDR,
(bus << IT_BUSNUM_SHF) |
(dev_fn << IT_FUNCNUM_SHF) |
((0x4 / 4) << IT_REGNUM_SHF));
IT_READ(IT_CONFDATA, data);
data |= 0x0100;
IT_WRITE(IT_CONFADDR,
(bus << IT_BUSNUM_SHF) |
(dev_fn << IT_FUNCNUM_SHF) |
((0x4 / 4) << IT_REGNUM_SHF));
IT_WRITE(IT_CONFDATA, data);
/* setup serial irq control register */
IT_WRITE(IT_CONFADDR,
(bus << IT_BUSNUM_SHF) |
(dev_fn << IT_FUNCNUM_SHF) |
((0x48 / 4) << IT_REGNUM_SHF));
IT_READ(IT_CONFDATA, data);
data = (data & 0xffff00ff) | 0xc400;
IT_WRITE(IT_CONFADDR,
(bus << IT_BUSNUM_SHF) |
(dev_fn << IT_FUNCNUM_SHF) |
((0x48 / 4) << IT_REGNUM_SHF));
IT_WRITE(IT_CONFDATA, data);
/* Enable I/O Space Subtractive Decode */
/* default 0x4C is 0x3f220000 */
IT_WRITE(IT_CONFADDR,
(bus << IT_BUSNUM_SHF) |
(dev_fn << IT_FUNCNUM_SHF) |
((0x4C / 4) << IT_REGNUM_SHF));
IT_WRITE(IT_CONFDATA, 0x3f2200f3);
}
|