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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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <arch/acpi.h>
#include <arch/io.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 <stdlib.h>
#include <string.h>
#include <reg_script.h>
#include <drivers/intel/gma/i915_reg.h>
#include <soc/cpu.h>
#include <soc/pm.h>
#include <soc/ramstage.h>
#include <soc/systemagent.h>
#include <vendorcode/google/chromeos/chromeos.h>
#define GT_RETRY 1000
#define GT_CDCLK_337 0
#define GT_CDCLK_450 1
#define GT_CDCLK_540 2
#define GT_CDCLK_675 3
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)
{
/* 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);
gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
if (!gtt_res || !gtt_res->base)
return;
/* Wait for any configured pre-graphics delay */
if (acpi_slp_type != SLEEP_STATE_S3) {
#if IS_ENABLED(CONFIG_CHROMEOS)
if (developer_mode_enabled() || recovery_mode_enabled() ||
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 /* CONFIG_CHROMEOS */
}
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,
};
static const unsigned short pci_device_ids[] = {
IGD_SKYLAKE_GT1_SULTM,
IGD_SKYLAKE_GT2_SULXM,
IGD_SKYLAKE_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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