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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google, Inc.
* Copyright (C) 2014 Sage Electronic Engineering, LLC.
*
* 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 <baytrail/iosf.h>
#if !defined(__PRE_RAM__)
#ifndef CONFIG_MMCONF_BASE_ADDRESS
#error CONFIG_MMCONF_BASE_ADDRESS must be set.
#endif
#define IOSF_PCI_BASE (CONFIG_MMCONF_BASE_ADDRESS + (IOSF_PCI_DEV << 12))
static inline void write_iosf_reg(int reg, uint32_t value)
{
write32((u32 *)(IOSF_PCI_BASE + reg), value);
}
static inline uint32_t read_iosf_reg(int reg)
{
return read32((u32 *)(IOSF_PCI_BASE + reg));
}
#else
static inline void write_iosf_reg(int reg, uint32_t value)
{
pci_write_config32(IOSF_PCI_DEV, reg, value);
}
static inline uint32_t read_iosf_reg(int reg)
{
return pci_read_config32(IOSF_PCI_DEV, reg);
}
#endif
/* Common sequences for all the port accesses. */
static uint32_t iosf_read_port(uint32_t cr, int reg)
{
cr |= IOSF_REG(reg) | IOSF_BYTE_EN;
write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
write_iosf_reg(MCR_REG, cr);
return read_iosf_reg(MDR_REG);
}
static void iosf_write_port(uint32_t cr, int reg, uint32_t val)
{
cr |= IOSF_REG(reg) | IOSF_BYTE_EN;
write_iosf_reg(MDR_REG, val);
write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
write_iosf_reg(MCR_REG, cr);
}
#define IOSF_READ(port) \
IOSF_OPCODE(IOSF_OP_READ_##port) | IOSF_PORT(IOSF_PORT_##port)
#define IOSF_WRITE(port) \
IOSF_OPCODE(IOSF_OP_WRITE_##port) | IOSF_PORT(IOSF_PORT_##port)
uint32_t iosf_bunit_read(int reg)
{
return iosf_read_port(IOSF_READ(BUNIT), reg);
}
void iosf_bunit_write(int reg, uint32_t val)
{
iosf_write_port(IOSF_WRITE(BUNIT), reg, val);
}
uint32_t iosf_dunit_read(int reg)
{
return iosf_read_port(IOSF_READ(SYSMEMC), reg);
}
uint32_t iosf_dunit_ch0_read(int reg)
{
return iosf_dunit_read(reg);
}
uint32_t iosf_dunit_ch1_read(int reg)
{
uint32_t cr = IOSF_OPCODE(IOSF_OP_READ_SYSMEMC) |
IOSF_PORT(IOSF_PORT_DUNIT_CH1);
return iosf_read_port(cr, reg);
}
void iosf_dunit_write(int reg, uint32_t val)
{
iosf_write_port(IOSF_WRITE(SYSMEMC), reg, val);
}
uint32_t iosf_lpss_read(int reg)
{
return iosf_read_port(IOSF_READ(LPSS), reg);
}
void iosf_lpss_write(int reg, uint32_t val)
{
return iosf_write_port(IOSF_WRITE(LPSS), reg, val);
}
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