diff options
Diffstat (limited to 'src/southbridge/intel/i3100/smbus.h')
| -rw-r--r-- | src/southbridge/intel/i3100/smbus.h | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/src/southbridge/intel/i3100/smbus.h b/src/southbridge/intel/i3100/smbus.h deleted file mode 100644 index 0b2f0601f1..0000000000 --- a/src/southbridge/intel/i3100/smbus.h +++ /dev/null @@ -1,151 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2008 Arastra, Inc. - * - * 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; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -/* This code is based on src/southbridge/intel/esb6300/esb6300_smbus.h */ - -#include <device/smbus_def.h> - -#define SMBHSTSTAT 0x0 -#define SMBHSTCTL 0x2 -#define SMBHSTCMD 0x3 -#define SMBXMITADD 0x4 -#define SMBHSTDAT0 0x5 -#define SMBHSTDAT1 0x6 -#define SMBBLKDAT 0x7 -#define SMBTRNSADD 0x9 -#define SMBSLVDATA 0xa -#define SMLINK_PIN_CTL 0xe -#define SMBUS_PIN_CTL 0xf -#define SMBSLVCMD 0x11 - -#define SMBUS_TIMEOUT (100*1000*10) - -static void smbus_delay(void) -{ - outb(0x80, 0x80); -} - -static int smbus_wait_until_ready(u32 smbus_io_base) -{ - u32 loops = SMBUS_TIMEOUT; - u8 byte; - do { - smbus_delay(); - if (--loops == 0) - break; - byte = inb(smbus_io_base + SMBHSTSTAT); - } while (byte & 1); - return loops ? 0 : -1; -} - -static int smbus_wait_until_done(u32 smbus_io_base) -{ - u32 loops = SMBUS_TIMEOUT; - u8 byte; - do { - smbus_delay(); - if (--loops == 0) - break; - byte = inb(smbus_io_base + SMBHSTSTAT); - } while ((byte & 1) || (byte & ~((1 << 6)|(1 << 0))) == 0); - return loops ? 0 : -1; -} - -static int do_smbus_read_byte(u32 smbus_io_base, u16 device, u8 address) -{ - u8 global_status_register; - u8 byte; - - if (smbus_wait_until_ready(smbus_io_base) < 0) { - return SMBUS_WAIT_UNTIL_READY_TIMEOUT; - } - /* setup transaction */ - /* disable interrupts */ - outb(inb(smbus_io_base + SMBHSTCTL) & (~1), smbus_io_base + SMBHSTCTL); - /* set the device I'm talking too */ - outb(((device & 0x7f) << 1) | 1, smbus_io_base + SMBXMITADD); - /* set the command/address... */ - outb(address & 0xFF, smbus_io_base + SMBHSTCMD); - /* set up for a byte data read */ - outb((inb(smbus_io_base + SMBHSTCTL) & 0xE3) | (0x2 << 2), smbus_io_base + SMBHSTCTL); - /* clear any lingering errors, so the transaction will run */ - outb(inb(smbus_io_base + SMBHSTSTAT), smbus_io_base + SMBHSTSTAT); - - /* clear the data byte...*/ - outb(0, smbus_io_base + SMBHSTDAT0); - - /* start the command */ - outb((inb(smbus_io_base + SMBHSTCTL) | 0x40), smbus_io_base + SMBHSTCTL); - - /* poll for transaction completion */ - if (smbus_wait_until_done(smbus_io_base) < 0) { - return SMBUS_WAIT_UNTIL_DONE_TIMEOUT; - } - - global_status_register = inb(smbus_io_base + SMBHSTSTAT); - - /* Ignore the In Use Status... */ - global_status_register &= ~(3 << 5); - - /* read results of transaction */ - byte = inb(smbus_io_base + SMBHSTDAT0); - if (global_status_register != (1 << 1)) { - return SMBUS_ERROR; - } - return byte; -} - -static int do_smbus_write_byte(unsigned smbus_base, unsigned device, unsigned address, unsigned data) -{ - unsigned char global_status_register; - - if (smbus_wait_until_ready(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_READY_TIMEOUT; - - /* Setup transaction */ - /* Disable interrupts */ - outb(inb(smbus_base + SMBHSTCTL) & (~1), smbus_base + SMBHSTCTL); - /* Set the device I'm talking too */ - outb(((device & 0x7f) << 1) & ~0x01, smbus_base + SMBXMITADD); - /* Set the command/address... */ - outb(address & 0xff, smbus_base + SMBHSTCMD); - /* Set up for a byte data read */ - outb((inb(smbus_base + SMBHSTCTL) & 0xe3) | (0x2 << 2), - (smbus_base + SMBHSTCTL)); - /* Clear any lingering errors, so the transaction will run */ - outb(inb(smbus_base + SMBHSTSTAT), smbus_base + SMBHSTSTAT); - - /* Clear the data byte... */ - outb(data, smbus_base + SMBHSTDAT0); - - /* Start the command */ - outb((inb(smbus_base + SMBHSTCTL) | 0x40), - smbus_base + SMBHSTCTL); - - /* Poll for transaction completion */ - if (smbus_wait_until_done(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_DONE_TIMEOUT; - - global_status_register = inb(smbus_base + SMBHSTSTAT); - - /* Ignore the "In Use" status... */ - global_status_register &= ~(3 << 5); - - /* Read results of transaction */ - if (global_status_register != (1 << 1)) - return SMBUS_ERROR; - - return 0; -} |