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/*
* This file is part of the coreboot project.
*
* 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/acpi.h>
#include <arch/io.h>
#include <bootmode.h>
#include <chip.h>
#include <console/console.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <drivers/intel/gma/i915_reg.h>
#include <fsp/util.h>
#include <soc/acpi.h>
#include <soc/cpu.h>
#include <soc/pm.h>
#include <soc/ramstage.h>
#include <soc/systemagent.h>
#include <stdlib.h>
#include <string.h>
#include <vboot/vbnv.h>
uintptr_t fsp_soc_get_igd_bar(void)
{
return find_resource(SA_DEV_IGD, PCI_BASE_ADDRESS_2)->base;
}
u32 map_oprom_vendev(u32 vendev)
{
return SA_IGD_OPROM_VENDEV;
}
static struct resource *gtt_res = NULL;
static unsigned long gtt_read(unsigned long reg)
{
u32 val;
val = read32((void *)(unsigned int)(gtt_res->base + reg));
return val;
}
static void gtt_write(unsigned long reg, unsigned long data)
{
write32((void *)(unsigned int)(gtt_res->base + reg), data);
}
static inline void gtt_rmw(u32 reg, u32 andmask, u32 ormask)
{
u32 val = gtt_read(reg);
val &= andmask;
val |= ormask;
gtt_write(reg, val);
}
static void igd_init(struct device *dev)
{
u32 ddi_buf_ctl;
gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
if (!gtt_res || !gtt_res->base)
return;
/*
* Enable DDI-A (eDP) 4-lane operation if the link is not up yet.
* This will allow the kernel to use 4-lane eDP links properly
* if the VBIOS or GOP driver does not execute.
*/
ddi_buf_ctl = gtt_read(DDI_BUF_CTL_A);
if (!acpi_is_wakeup_s3() && !(ddi_buf_ctl & DDI_BUF_CTL_ENABLE)) {
ddi_buf_ctl |= DDI_A_4_LANES;
gtt_write(DDI_BUF_CTL_A, ddi_buf_ctl);
}
if (IS_ENABLED(CONFIG_ADD_VBT_DATA_FILE))
return;
/* IGD needs to be Bus Master */
u32 reg32 = pci_read_config32(dev, PCI_COMMAND);
reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
pci_write_config32(dev, PCI_COMMAND, reg32);
/* Wait for any configured pre-graphics delay */
if (!acpi_is_wakeup_s3()) {
#if IS_ENABLED(CONFIG_CHROMEOS)
if (display_init_required() || vboot_wants_oprom())
mdelay(CONFIG_PRE_GRAPHICS_DELAY);
#else
mdelay(CONFIG_PRE_GRAPHICS_DELAY);
#endif
}
/* Initialize PCI device, load/execute BIOS Option ROM */
pci_dev_init(dev);
#if IS_ENABLED(CONFIG_CHROMEOS)
if (!gfx_get_init_done() && !acpi_is_wakeup_s3()) {
/*
* Enable DDI-A if the Option ROM did not execute:
*
* bit 0: Display detected (RO)
* bit 4: DDI A supports 4 lanes and DDI E is not used
* bit 7: DDI buffer is idle
*/
gtt_write(DDI_BUF_CTL_A, DDI_BUF_IS_IDLE | DDI_A_4_LANES |
DDI_INIT_DISPLAY_DETECTED);
}
#endif
}
/* Initialize IGD OpRegion, called from ACPI code */
static int update_igd_opregion(igd_opregion_t *opregion)
{
u16 reg16;
/* Initialize Mailbox 3 */
opregion->mailbox3.bclp = IGD_BACKLIGHT_BRIGHTNESS;
opregion->mailbox3.pfit = IGD_FIELD_VALID | IGD_PFIT_STRETCH;
opregion->mailbox3.pcft = 0; /* should be (IMON << 1) & 0x3e */
opregion->mailbox3.cblv = IGD_FIELD_VALID | IGD_INITIAL_BRIGHTNESS;
opregion->mailbox3.bclm[0] = IGD_WORD_FIELD_VALID + 0x0000;
opregion->mailbox3.bclm[1] = IGD_WORD_FIELD_VALID + 0x0a19;
opregion->mailbox3.bclm[2] = IGD_WORD_FIELD_VALID + 0x1433;
opregion->mailbox3.bclm[3] = IGD_WORD_FIELD_VALID + 0x1e4c;
opregion->mailbox3.bclm[4] = IGD_WORD_FIELD_VALID + 0x2866;
opregion->mailbox3.bclm[5] = IGD_WORD_FIELD_VALID + 0x327f;
opregion->mailbox3.bclm[6] = IGD_WORD_FIELD_VALID + 0x3c99;
opregion->mailbox3.bclm[7] = IGD_WORD_FIELD_VALID + 0x46b2;
opregion->mailbox3.bclm[8] = IGD_WORD_FIELD_VALID + 0x50cc;
opregion->mailbox3.bclm[9] = IGD_WORD_FIELD_VALID + 0x5ae5;
opregion->mailbox3.bclm[10] = IGD_WORD_FIELD_VALID + 0x64ff;
/* TODO This may need to happen in S3 resume */
pci_write_config32(SA_DEV_IGD, ASLS, (u32)opregion);
reg16 = pci_read_config16(SA_DEV_IGD, SWSCI);
reg16 &= ~GSSCIE;
reg16 |= SMISCISEL;
pci_write_config16(SA_DEV_IGD, SWSCI, reg16);
return 0;
}
static unsigned long write_acpi_igd_opregion(device_t device,
unsigned long current, struct acpi_rsdp *rsdp)
{
igd_opregion_t *opregion;
/* If GOP is not used, exit here */
if (!IS_ENABLED(CONFIG_ADD_VBT_DATA_FILE))
return current;
/* If IGD is disabled, exit here */
if (pci_read_config16(device, PCI_VENDOR_ID) == 0xFFFF)
return current;
printk(BIOS_DEBUG, "ACPI: * IGD OpRegion\n");
opregion = (igd_opregion_t *)current;
init_igd_opregion(opregion);
update_igd_opregion(opregion);
current += sizeof(igd_opregion_t);
current = acpi_align_current(current);
printk(BIOS_DEBUG, "current = %lx\n", current);
return current;
}
static struct device_operations igd_ops = {
.read_resources = &pci_dev_read_resources,
.set_resources = &pci_dev_set_resources,
.enable_resources = &pci_dev_enable_resources,
.init = &igd_init,
.ops_pci = &soc_pci_ops,
.write_acpi_tables = write_acpi_igd_opregion,
};
static const unsigned short pci_device_ids[] = {
IGD_SKYLAKE_GT1_SULTM,
IGD_SKYLAKE_GT2_SULXM,
IGD_SKYLAKE_GT2_SULTM,
IGD_KABYLAKE_GT1_SULTM,
IGD_KABYLAKE_GT2_SULXM,
IGD_KABYLAKE_GT2_SULTM,
0,
};
static const struct pci_driver igd_driver __pci_driver = {
.ops = &igd_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
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