diff options
Diffstat (limited to 'src/soc/intel/skylake/smbus_common.c')
| -rw-r--r-- | src/soc/intel/skylake/smbus_common.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/src/soc/intel/skylake/smbus_common.c b/src/soc/intel/skylake/smbus_common.c deleted file mode 100644 index 63a4f8aad1..0000000000 --- a/src/soc/intel/skylake/smbus_common.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2005 Yinghai Lu <yinghailu@gmail.com> - * Copyright (C) 2008-2009 coresystems GmbH - * Copyright (C) 2014 Google Inc. - * Copyright (C) 2015 Intel Corporation. - * - * 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 <arch/io.h> -#include <console/console.h> -#include <device/device.h> -#include <device/path.h> -#include <device/smbus_def.h> -#include <device/pci.h> -#include <device/pci_ids.h> -#include <soc/ramstage.h> -#include <soc/smbus.h> - -static void smbus_delay(void) -{ - inb(0x80); -} - -static int smbus_wait_until_ready(u16 smbus_base) -{ - unsigned int 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 int 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; -} - -int do_smbus_read_byte(unsigned int smbus_base, unsigned int device, - unsigned int 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; -} - -int do_smbus_write_byte(unsigned int smbus_base, unsigned int device, - unsigned int address, unsigned int 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) { - printk(BIOS_ERR, "SMBUS transaction timeout\n"); - 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)) { - printk(BIOS_ERR, "SMBUS transaction error\n"); - return SMBUS_ERROR; - } - - return 0; -} |