diff options
Diffstat (limited to 'src/drivers/intel/gma/vbt.c')
| -rw-r--r-- | src/drivers/intel/gma/vbt.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/drivers/intel/gma/vbt.c b/src/drivers/intel/gma/vbt.c new file mode 100644 index 0000000000..1cc4e93ae6 --- /dev/null +++ b/src/drivers/intel/gma/vbt.c @@ -0,0 +1,110 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013, 2014 Vladimir Serbinenko + * + * 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 or (at your option) + * any later version 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <console/console.h> +#include <delay.h> +#include <device/device.h> +#include <string.h> +#include <device/pci_rom.h> + +#include "i915.h" +#include "intel_bios.h" + +static size_t generate_vbt(const struct i915_gpu_controller_info *conf, + void *vbt, const char *idstr) +{ + struct vbt_header *head = vbt; + struct bdb_header *bdb_head; + struct bdb_general_features *genfeat; + u8 *ptr; + + memset (head, 0, sizeof (*head)); + + memcpy (head->signature, idstr, 20); + head->version = 100; + head->header_size = sizeof (*head); + head->bdb_offset = sizeof (*head); + + bdb_head = (struct bdb_header *) (head + 1); + memset (bdb_head, 0, sizeof (*bdb_head)); + memcpy (bdb_head->signature, "BIOS_DATA_BLOCK ", 16); + bdb_head->version = 0xa8; + bdb_head->header_size = sizeof (*bdb_head); + + ptr = (u8 *) (bdb_head + 1); + + ptr[0] = BDB_GENERAL_FEATURES; + ptr[1] = sizeof (*genfeat); + ptr[2] = sizeof (*genfeat) >> 8; + ptr += 3; + + genfeat = (struct bdb_general_features *) ptr; + memset (genfeat, 0, sizeof (*genfeat)); + genfeat->panel_fitting = 3; + genfeat->flexaim = 1; + genfeat->download_ext_vbt = 1; + genfeat->enable_ssc = conf->use_spread_spectrum_clock; + genfeat->ssc_freq = !conf->link_frequency_270_mhz; + genfeat->rsvd10 = 0x4; + genfeat->legacy_monitor_detect = 1; + genfeat->int_crt_support = 1; + genfeat->dp_ssc_enb = 1; + + ptr += sizeof (*genfeat); + + bdb_head->bdb_size = ptr - (u8 *)bdb_head; + head->vbt_size = ptr - (u8 *)head; + head->vbt_checksum = 0; + return ptr - (u8 *)head; +} + +void +generate_fake_intel_oprom(const struct i915_gpu_controller_info *conf, + struct device *dev, const char *idstr) +{ + optionrom_header_t *oh = (void *)PCI_VGA_RAM_IMAGE_START; + optionrom_pcir_t *pcir; + size_t vbt_size; + size_t fake_oprom_size; + + memset(oh, 0, 8192); + + oh->signature = PCI_ROM_HDR; + oh->pcir_offset = 0x40; + oh->vbt_offset = 0x80; + + pcir = (void *)(PCI_VGA_RAM_IMAGE_START + 0x40); + pcir->signature = 0x52494350; // PCIR + pcir->vendor = dev->vendor; + pcir->device = dev->device; + pcir->length = sizeof(*pcir); + pcir->revision = dev->class; + pcir->classcode[0] = dev->class >> 8; + pcir->classcode[1] = dev->class >> 16; + pcir->classcode[2] = dev->class >> 24; + pcir->indicator = 0x80; + + vbt_size = generate_vbt (conf, (void *)(PCI_VGA_RAM_IMAGE_START + 0x80), idstr); + fake_oprom_size = (0x80 + vbt_size + 511) / 512; + oh->size = fake_oprom_size; + pcir->imagelength = fake_oprom_size; + +} |