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/*
* Copyright (C) 2014 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <pch.h>
#include <syscon.h>
#include <asm/cpu.h>
#include <asm/intel_regs.h>
#include <asm/io.h>
#include <asm/lapic.h>
#include <asm/lpc_common.h>
#include <asm/pci.h>
#include <asm/arch/bd82x6x.h>
#include <asm/arch/model_206ax.h>
#include <asm/arch/pch.h>
#include <asm/arch/sandybridge.h>
#define GPIO_BASE 0x48
#define BIOS_CTRL 0xdc
#ifndef CONFIG_HAVE_FSP
static int pch_revision_id = -1;
static int pch_type = -1;
/**
* pch_silicon_revision() - Read silicon revision ID from the PCH
*
* @dev: PCH device
* @return silicon revision ID
*/
static int pch_silicon_revision(struct udevice *dev)
{
u8 val;
if (pch_revision_id < 0) {
dm_pci_read_config8(dev, PCI_REVISION_ID, &val);
pch_revision_id = val;
}
return pch_revision_id;
}
int pch_silicon_type(struct udevice *dev)
{
u8 val;
if (pch_type < 0) {
dm_pci_read_config8(dev, PCI_DEVICE_ID + 1, &val);
pch_type = val;
}
return pch_type;
}
/**
* pch_silicon_supported() - Check if a certain revision is supported
*
* @dev: PCH device
* @type: PCH type
* @rev: Minimum required resion
* @return 0 if not supported, 1 if supported
*/
static int pch_silicon_supported(struct udevice *dev, int type, int rev)
{
int cur_type = pch_silicon_type(dev);
int cur_rev = pch_silicon_revision(dev);
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 try = IOBP_RETRY;
u32 data;
while (try--) {
data = readl(RCB_REG(IOBPS));
if ((data & 1) == 0)
return 1;
udelay(10);
}
printf("IOBP timeout\n");
return 0;
}
void pch_iobp_update(struct udevice *dev, u32 address, u32 andvalue,
u32 orvalue)
{
u32 data;
/* Set the address */
writel(address, RCB_REG(IOBPIRI));
/* READ OPCODE */
if (pch_silicon_supported(dev, PCH_TYPE_CPT, PCH_STEP_B0))
writel(IOBPS_RW_BX, RCB_REG(IOBPS));
else
writel(IOBPS_READ_AX, RCB_REG(IOBPS));
if (!iobp_poll())
return;
/* Read IOBP data */
data = readl(RCB_REG(IOBPD));
if (!iobp_poll())
return;
/* Check for successful transaction */
if ((readl(RCB_REG(IOBPS)) & 0x6) != 0) {
printf("IOBP read 0x%08x failed\n", address);
return;
}
/* Update the data */
data &= andvalue;
data |= orvalue;
/* WRITE OPCODE */
if (pch_silicon_supported(dev, PCH_TYPE_CPT, PCH_STEP_B0))
writel(IOBPS_RW_BX, RCB_REG(IOBPS));
else
writel(IOBPS_WRITE_AX, RCB_REG(IOBPS));
if (!iobp_poll())
return;
/* Write IOBP data */
writel(data, RCB_REG(IOBPD));
if (!iobp_poll())
return;
}
static int bd82x6x_probe(struct udevice *dev)
{
struct udevice *gma_dev;
int ret;
if (!(gd->flags & GD_FLG_RELOC))
return 0;
/* Cause the SATA device to do its init */
uclass_first_device(UCLASS_AHCI, &dev);
ret = syscon_get_by_driver_data(X86_SYSCON_GMA, &gma_dev);
if (ret)
return ret;
ret = gma_func0_init(gma_dev);
if (ret)
return ret;
return 0;
}
#endif /* CONFIG_HAVE_FSP */
static int bd82x6x_pch_get_spi_base(struct udevice *dev, ulong *sbasep)
{
u32 rcba;
dm_pci_read_config32(dev, PCH_RCBA, &rcba);
/* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */
rcba = rcba & 0xffffc000;
*sbasep = rcba + 0x3800;
return 0;
}
static int bd82x6x_set_spi_protect(struct udevice *dev, bool protect)
{
return lpc_set_spi_protect(dev, BIOS_CTRL, protect);
}
static int bd82x6x_get_gpio_base(struct udevice *dev, u32 *gbasep)
{
u32 base;
/*
* GPIO_BASE moved to its current offset with ICH6, but prior to
* that it was unused (or undocumented). Check that it looks
* okay: not all ones or zeros.
*
* Note we don't need check bit0 here, because the Tunnel Creek
* GPIO base address register bit0 is reserved (read returns 0),
* while on the Ivybridge the bit0 is used to indicate it is an
* I/O space.
*/
dm_pci_read_config32(dev, GPIO_BASE, &base);
if (base == 0x00000000 || base == 0xffffffff) {
debug("%s: unexpected BASE value\n", __func__);
return -ENODEV;
}
/*
* Okay, I guess we're looking at the right device. The actual
* GPIO registers are in the PCI device's I/O space, starting
* at the offset that we just read. Bit 0 indicates that it's
* an I/O address, not a memory address, so mask that off.
*/
*gbasep = base & 1 ? base & ~3 : base & ~15;
return 0;
}
static const struct pch_ops bd82x6x_pch_ops = {
.get_spi_base = bd82x6x_pch_get_spi_base,
.set_spi_protect = bd82x6x_set_spi_protect,
.get_gpio_base = bd82x6x_get_gpio_base,
};
static const struct udevice_id bd82x6x_ids[] = {
{ .compatible = "intel,bd82x6x" },
{ }
};
U_BOOT_DRIVER(bd82x6x_drv) = {
.name = "bd82x6x",
.id = UCLASS_PCH,
.of_match = bd82x6x_ids,
#ifndef CONFIG_HAVE_FSP
.probe = bd82x6x_probe,
#endif
.ops = &bd82x6x_pch_ops,
};
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