145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
/*
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*
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* BRIEF MODULE DESCRIPTION
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* ITE Semi IT8712 Super I/O functions.
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <asm/io.h>
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#include <asm/types.h>
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#include <asm/it8712.h>
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#include <asm/it8172/it8172.h>
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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void LPCEnterMBPnP(void)
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{
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int i;
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unsigned char key[4] = {0x87, 0x01, 0x55, 0x55};
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for (i = 0; i<4; i++)
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outb(key[i], LPC_KEY_ADDR);
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}
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void LPCExitMBPnP(void)
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{
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outb(0x02, LPC_KEY_ADDR);
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outb(0x02, LPC_DATA_ADDR);
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}
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void LPCSetConfig(char LdnNumber, char Index, char data)
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{
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LPCEnterMBPnP(); // Enter IT8712 MB PnP mode
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outb(0x07, LPC_KEY_ADDR);
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outb(LdnNumber, LPC_DATA_ADDR);
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outb(Index, LPC_KEY_ADDR);
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outb(data, LPC_DATA_ADDR);
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LPCExitMBPnP();
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}
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char LPCGetConfig(char LdnNumber, char Index)
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{
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char rtn;
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LPCEnterMBPnP(); // Enter IT8712 MB PnP mode
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outb(0x07, LPC_KEY_ADDR);
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outb(LdnNumber, LPC_DATA_ADDR);
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outb(Index, LPC_KEY_ADDR);
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rtn = inb(LPC_DATA_ADDR);
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LPCExitMBPnP();
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return rtn;
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}
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int SearchIT8712(void)
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{
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unsigned char Id1, Id2;
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unsigned short Id;
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LPCEnterMBPnP();
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outb(0x20, LPC_KEY_ADDR); /* chip id byte 1 */
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Id1 = inb(LPC_DATA_ADDR);
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outb(0x21, LPC_KEY_ADDR); /* chip id byte 2 */
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Id2 = inb(LPC_DATA_ADDR);
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Id = (Id1 << 8) | Id2;
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LPCExitMBPnP();
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if (Id == 0x8712)
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return TRUE;
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else
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return FALSE;
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}
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void InitLPCInterface(void)
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{
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unsigned char bus, dev_fn;
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unsigned long data;
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bus = 0;
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dev_fn = 1<<3 | 4;
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/* pci cmd, SERR# Enable */
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IT_WRITE(IT_CONFADDR,
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(bus << IT_BUSNUM_SHF) |
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(dev_fn << IT_FUNCNUM_SHF) |
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((0x4 / 4) << IT_REGNUM_SHF));
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IT_READ(IT_CONFDATA, data);
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data |= 0x0100;
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IT_WRITE(IT_CONFADDR,
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(bus << IT_BUSNUM_SHF) |
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(dev_fn << IT_FUNCNUM_SHF) |
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((0x4 / 4) << IT_REGNUM_SHF));
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IT_WRITE(IT_CONFDATA, data);
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/* setup serial irq control register */
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IT_WRITE(IT_CONFADDR,
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(bus << IT_BUSNUM_SHF) |
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(dev_fn << IT_FUNCNUM_SHF) |
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((0x48 / 4) << IT_REGNUM_SHF));
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IT_READ(IT_CONFDATA, data);
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data = (data & 0xffff00ff) | 0xc400;
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IT_WRITE(IT_CONFADDR,
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(bus << IT_BUSNUM_SHF) |
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(dev_fn << IT_FUNCNUM_SHF) |
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((0x48 / 4) << IT_REGNUM_SHF));
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IT_WRITE(IT_CONFDATA, data);
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/* Enable I/O Space Subtractive Decode */
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/* default 0x4C is 0x3f220000 */
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IT_WRITE(IT_CONFADDR,
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(bus << IT_BUSNUM_SHF) |
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(dev_fn << IT_FUNCNUM_SHF) |
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((0x4C / 4) << IT_REGNUM_SHF));
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IT_WRITE(IT_CONFDATA, 0x3f2200f3);
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}
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