/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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_GOP_SUPPORT)) 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 init_igd_opregion(igd_opregion_t *opregion) { const optionrom_vbt_t *vbt; uint32_t vbt_len; u16 reg16; memset(opregion, 0, sizeof(igd_opregion_t)); /* Read VBT table from flash */ vbt = fsp_get_vbt(&vbt_len); if (!vbt) die("vbt data not found"); memcpy(&opregion->header.signature, IGD_OPREGION_SIGNATURE, sizeof(IGD_OPREGION_SIGNATURE) - 1); memcpy(opregion->header.vbios_version, vbt->coreblock_biosbuild, sizeof(u32)); memcpy(opregion->vbt.gvd1, vbt, vbt->hdr_vbt_size < sizeof(opregion->vbt.gvd1) ? vbt->hdr_vbt_size : sizeof(opregion->vbt.gvd1)); /* Size, in KB, of the entire OpRegion structure (including header)*/ opregion->header.size = sizeof(igd_opregion_t) / KiB; opregion->header.version = IGD_OPREGION_VERSION; /* We just assume we're mobile for now */ opregion->header.mailboxes = MAILBOXES_MOBILE; /* TODO Initialize Mailbox 1 */ /* 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_GOP_SUPPORT)) 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); 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, };