diff options
Diffstat (limited to 'arch/mips/ite-boards/generic/lpc.c')
| -rw-r--r-- | arch/mips/ite-boards/generic/lpc.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/arch/mips/ite-boards/generic/lpc.c b/arch/mips/ite-boards/generic/lpc.c new file mode 100644 index 00000000000..cc7584fbef8 --- /dev/null +++ b/arch/mips/ite-boards/generic/lpc.c @@ -0,0 +1,144 @@ +/* + * + * 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); +} |