From 4bab6e79b078c76d0a42883c4b4c9c68615d5a1e Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Tue, 3 May 2016 15:53:33 -0700 Subject: intel/sch: Merge northbridge and southbridge in src/soc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: I6ea9b9d2353c0d767c837e6d629b45f23b306f6e Signed-off-by: Stefan Reinauer Reviewed-on: https://review.coreboot.org/14599 Tested-by: build bot (Jenkins) Reviewed-by: Kyösti Mälkki Reviewed-by: Vladimir Serbinenko --- src/southbridge/intel/sch/smbus.h | 94 --------------------------------------- 1 file changed, 94 deletions(-) delete mode 100644 src/southbridge/intel/sch/smbus.h (limited to 'src/southbridge/intel/sch/smbus.h') diff --git a/src/southbridge/intel/sch/smbus.h b/src/southbridge/intel/sch/smbus.h deleted file mode 100644 index e34ca52cb0..0000000000 --- a/src/southbridge/intel/sch/smbus.h +++ /dev/null @@ -1,94 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2005 Yinghai Lu - * Copyright (C) 2009 coresystems GmbH - * - * 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. - */ - -#include - -static void smbus_delay(void) -{ - inb(0x80); -} - -static int smbus_wait_until_ready(u16 smbus_base) -{ - unsigned loops = SMBUS_TIMEOUT; - unsigned char byte; - do { - smbus_delay(); - if (--loops == 0) - break; - byte = inb(smbus_base + SMBHSTSTAT); - } while (byte & 1); - return loops ? 0 : -1; -} - -static int smbus_wait_until_done(u16 smbus_base) -{ - unsigned loops = SMBUS_TIMEOUT; - unsigned char byte; - do { - smbus_delay(); - if (--loops == 0) - break; - byte = inb(smbus_base + SMBHSTSTAT); - } while ((byte & 1) || (byte & ~((1 << 6) | (1 << 0))) == 0); - return loops ? 0 : -1; -} - -static int do_smbus_read_byte(unsigned smbus_base, unsigned device, - unsigned address) -{ - unsigned char global_status_register; - unsigned char byte; - - 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) | 1, 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(0, 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 */ - byte = inb(smbus_base + SMBHSTDAT0); - if (global_status_register != (1 << 1)) { - return SMBUS_ERROR; - } - return byte; -} -- cgit v1.2.3