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/* SPDX-License-Identifier: GPL-2.0-only */
#define __SIMPLE_DEVICE__
#include <console/console.h>
#include <delay.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <stdint.h>
#include "pch.h"
int pch_silicon_revision(void)
{
static int pch_revision_id = -1;
if (pch_revision_id < 0)
pch_revision_id = pci_read_config8(PCH_LPC_DEV, PCI_REVISION_ID);
return pch_revision_id;
}
int pch_silicon_type(void)
{
static int pch_type = -1;
if (pch_type < 0)
pch_type = pci_read_config8(PCH_LPC_DEV, PCI_DEVICE_ID + 1);
return pch_type;
}
int pch_silicon_supported(int type, int rev)
{
int cur_type = pch_silicon_type();
int cur_rev = pch_silicon_revision();
switch (type) {
case PCH_TYPE_CPT:
/* CougarPoint minimum revision */
if (cur_type == PCH_TYPE_CPT && cur_rev >= rev)
return 1;
/* PantherPoint any revision */
if (cur_type == PCH_TYPE_PPT)
return 1;
break;
case PCH_TYPE_PPT:
/* PantherPoint minimum revision */
if (cur_type == PCH_TYPE_PPT && cur_rev >= rev)
return 1;
break;
}
return 0;
}
#define IOBP_RETRY 1000
static inline int iobp_poll(void)
{
unsigned int try = IOBP_RETRY;
u32 data;
while (try--) {
data = RCBA32(IOBPS);
if ((data & 1) == 0)
return 1;
udelay(10);
}
printk(BIOS_ERR, "IOBP timeout\n");
return 0;
}
void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue)
{
u32 data;
/* Set the address */
RCBA32(IOBPIRI) = address;
/* READ OPCODE */
if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B0))
RCBA32(IOBPS) = IOBPS_RW_BX;
else
RCBA32(IOBPS) = IOBPS_READ_AX;
if (!iobp_poll())
return;
/* Read IOBP data */
data = RCBA32(IOBPD);
if (!iobp_poll())
return;
/* Check for successful transaction */
if ((RCBA32(IOBPS) & 0x6) != 0) {
printk(BIOS_ERR, "IOBP read 0x%08x failed\n", address);
return;
}
/* Update the data */
data &= andvalue;
data |= orvalue;
/* WRITE OPCODE */
if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B0))
RCBA32(IOBPS) = IOBPS_RW_BX;
else
RCBA32(IOBPS) = IOBPS_WRITE_AX;
if (!iobp_poll())
return;
/* Write IOBP data */
RCBA32(IOBPD) = data;
if (!iobp_poll())
return;
}
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