| /* |
| * Copyright (C) 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 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 <stdio.h> |
| #include <sys/mman.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| |
| typedef uint8_t u8; |
| typedef uint16_t u16; |
| typedef uint32_t u32; |
| |
| |
| typedef struct { |
| u16 signature; |
| u8 size; |
| u8 reserved[21]; |
| u16 pcir_offset; |
| u16 vbt_offset; |
| } __attribute__ ((packed)) optionrom_header_t; |
| |
| struct vbt_header { |
| u8 signature[20]; |
| u16 version; |
| u16 header_size; |
| u16 vbt_size; |
| u8 vbt_checksum; |
| u8 reserved0; |
| u32 bdb_offset; |
| u32 aim_offset[4]; |
| } __attribute__ ((packed)); |
| |
| struct bdb_header { |
| u8 signature[16]; |
| u16 version; |
| u16 header_size; |
| u16 bdb_size; |
| }; |
| |
| struct vbios_data { |
| u8 type; /* 0 == desktop, 1 == mobile */ |
| u8 relstage; |
| u8 chipset; |
| u8 lvds_present:1; |
| u8 tv_present:1; |
| u8 rsvd2:6; /* finish byte */ |
| u8 rsvd3[4]; |
| u8 signon[155]; |
| u8 copyright[61]; |
| u16 code_segment; |
| u8 dos_boot_mode; |
| u8 bandwidth_percent; |
| u8 rsvd4; /* popup memory size */ |
| u8 resize_pci_bios; |
| u8 rsvd5; /* is crt already on ddc2 */ |
| } __attribute__ ((packed)); |
| |
| struct bdb_general_features { |
| /* bits 1 */ |
| u8 panel_fitting:2; |
| u8 flexaim:1; |
| u8 msg_enable:1; |
| u8 clear_screen:3; |
| u8 color_flip:1; |
| |
| /* bits 2 */ |
| u8 download_ext_vbt:1; |
| u8 enable_ssc:1; |
| u8 ssc_freq:1; |
| u8 enable_lfp_on_override:1; |
| u8 disable_ssc_ddt:1; |
| u8 rsvd7:1; |
| u8 display_clock_mode:1; |
| u8 rsvd8:1; /* finish byte */ |
| |
| /* bits 3 */ |
| u8 disable_smooth_vision:1; |
| u8 single_dvi:1; |
| u8 rsvd9:1; |
| u8 fdi_rx_polarity_inverted:1; |
| u8 rsvd10:4; /* finish byte */ |
| |
| /* bits 4 */ |
| u8 legacy_monitor_detect; |
| |
| /* bits 5 */ |
| u8 int_crt_support:1; |
| u8 int_tv_support:1; |
| u8 int_efp_support:1; |
| u8 dp_ssc_enb:1; /* PCH attached eDP supports SSC */ |
| u8 dp_ssc_freq:1; /* SSC freq for PCH attached eDP */ |
| u8 rsvd11:3; /* finish byte */ |
| } __attribute__ ((packed)); |
| |
| struct common_child_dev_config { |
| u16 handle; |
| u16 device_type; |
| u8 not_common1[12]; |
| u8 dvo_port; |
| u8 i2c_pin; |
| u8 slave_addr; |
| u8 ddc_pin; |
| u16 edid_ptr; |
| u8 not_common3[6]; |
| u8 dvo_wiring; |
| u8 not_common4[4]; |
| } __attribute__ ((packed)); |
| |
| struct bdb_general_definitions { |
| /* DDC GPIO */ |
| u8 crt_ddc_gmbus_pin; |
| |
| /* DPMS bits */ |
| u8 dpms_acpi:1; |
| u8 skip_boot_crt_detect:1; |
| u8 dpms_aim:1; |
| u8 rsvd1:5; /* finish byte */ |
| |
| /* boot device bits */ |
| u8 boot_display[2]; |
| u8 child_dev_size; |
| |
| /* |
| * Device info: |
| * If TV is present, it'll be at devices[0]. |
| * LVDS will be next, either devices[0] or [1], if present. |
| * On some platforms the number of device is 6. But could be as few as |
| * 4 if both TV and LVDS are missing. |
| * And the device num is related with the size of general definition |
| * block. It is obtained by using the following formula: |
| * number = (block_size - sizeof(bdb_general_definitions))/ |
| * sizeof(child_device_config); |
| */ |
| struct common_child_dev_config devices[0]; |
| } __attribute__ ((packed)); |
| |
| struct bdb_driver_features { |
| u8 boot_dev_algorithm:1; |
| u8 block_display_switch:1; |
| u8 allow_display_switch:1; |
| u8 hotplug_dvo:1; |
| u8 dual_view_zoom:1; |
| u8 int15h_hook:1; |
| u8 sprite_in_clone:1; |
| u8 primary_lfp_id:1; |
| |
| u16 boot_mode_x; |
| u16 boot_mode_y; |
| u8 boot_mode_bpp; |
| u8 boot_mode_refresh; |
| |
| u16 enable_lfp_primary:1; |
| u16 selective_mode_pruning:1; |
| u16 dual_frequency:1; |
| u16 render_clock_freq:1; /* 0: high freq; 1: low freq */ |
| u16 nt_clone_support:1; |
| u16 power_scheme_ui:1; /* 0: CUI; 1: 3rd party */ |
| u16 sprite_display_assign:1; /* 0: secondary; 1: primary */ |
| u16 cui_aspect_scaling:1; |
| u16 preserve_aspect_ratio:1; |
| u16 sdvo_device_power_down:1; |
| u16 crt_hotplug:1; |
| u16 lvds_config:2; |
| u16 tv_hotplug:1; |
| u16 hdmi_config:2; |
| |
| u8 static_display:1; |
| u8 reserved2:7; |
| u16 legacy_crt_max_x; |
| u16 legacy_crt_max_y; |
| u8 legacy_crt_max_refresh; |
| |
| u8 hdmi_termination; |
| u8 custom_vbt_version; |
| } __attribute__ ((packed)); |
| |
| struct bdb_lvds_options { |
| u8 panel_type; |
| u8 rsvd1; |
| /* LVDS capabilities, stored in a dword */ |
| u8 pfit_mode:2; |
| u8 pfit_text_mode_enhanced:1; |
| u8 pfit_gfx_mode_enhanced:1; |
| u8 pfit_ratio_auto:1; |
| u8 pixel_dither:1; |
| u8 lvds_edid:1; |
| u8 rsvd2:1; |
| u8 rsvd4; |
| } __attribute__ ((packed)); |
| |
| struct bdb_sdvo_lvds_options { |
| u8 panel_backlight; |
| u8 h40_set_panel_type; |
| u8 panel_type; |
| u8 ssc_clk_freq; |
| u16 als_low_trip; |
| u16 als_high_trip; |
| u8 sclalarcoeff_tab_row_num; |
| u8 sclalarcoeff_tab_row_size; |
| u8 coefficient[8]; |
| u8 panel_misc_bits_1; |
| u8 panel_misc_bits_2; |
| u8 panel_misc_bits_3; |
| u8 panel_misc_bits_4; |
| } __attribute__ ((packed)); |
| |
| |
| #define BDB_GENERAL_FEATURES 1 |
| #define BDB_GENERAL_DEFINITIONS 2 |
| |
| #define BDB_DRIVER_FEATURES 12 |
| #define BDB_SDVO_LVDS_OPTIONS 22 |
| #define BDB_SDVO_PANEL_DTDS 23 |
| #define BDB_LVDS_OPTIONS 40 |
| #define BDB_LVDS_LFP_DATA_PTRS 41 |
| #define BDB_LVDS_LFP_DATA 42 |
| |
| #define BDB_SKIP 254 |
| |
| static void parse_vbt(const void *vbt) |
| { |
| const struct vbt_header *head = vbt; |
| const struct bdb_header *bdb; |
| int i; |
| const u8 *ptr; |
| int is_first_skip = 1; |
| |
| if (memcmp(head->signature, "$VBT", 4) != 0) { |
| fprintf(stderr, "invalid VBT signature\n"); |
| exit(1); |
| } |
| printf("signature: <%20.20s>\n", head->signature); |
| printf("version: %d.%02d\n", head->version / 100, |
| head->version % 100); |
| if (head->header_size != sizeof(struct vbt_header)) |
| printf("header size: 0x%x\n", head->header_size); |
| printf("VBT size: 0x%x\n", head->vbt_size); |
| printf("VBT checksum: 0x%x\n", head->vbt_checksum); |
| if (head->reserved0) |
| printf("header reserved0: 0x%x\n", head->reserved0); |
| if (head->bdb_offset != sizeof(struct vbt_header)) |
| printf("BDB offset: 0x%x\n", head->bdb_offset); |
| |
| for (i = 0; i < 4; i++) |
| if (head->aim_offset[i]) |
| printf("AIM[%d] offset: 0x%x\n", i, |
| head->aim_offset[i]); |
| bdb = (const void *) ((const char *) vbt + head->bdb_offset); |
| |
| if (memcmp("BIOS_DATA_BLOCK ", bdb->signature, 16) != 0) { |
| fprintf(stderr, "invalid BDB signature:%s\n", |
| bdb->signature); |
| exit(1); |
| } |
| printf("BDB version: %d.%02d\n", bdb->version / 100, |
| bdb->version % 100); |
| if (bdb->header_size != sizeof(struct bdb_header)) |
| printf("BDB header size: 0x%x\n", bdb->header_size); |
| if (bdb->bdb_size != head->vbt_size - head->bdb_offset) |
| printf("BDB size: 0x%x\n", bdb->bdb_size); |
| for (ptr = (const u8 *) bdb + bdb->header_size; |
| ptr < (const u8 *) bdb + bdb->bdb_size;) { |
| u16 secsz = (ptr[1] | (ptr[2] << 8)); |
| u8 sectype = ptr[0]; |
| const u8 *section = ptr + 3; |
| |
| printf("section type %d, size 0x%x\n", sectype, secsz); |
| ptr += secsz + 3; |
| switch (sectype) { |
| case BDB_GENERAL_FEATURES:{ |
| const struct bdb_general_features *sec = |
| (const void *) section; |
| printf("General features:\n"); |
| |
| if (sec->panel_fitting) |
| printf("\tpanel_fitting = 0x%x\n", |
| sec->panel_fitting); |
| if (sec->flexaim) |
| printf("\tflexaim = 0x%x\n", |
| sec->flexaim); |
| if (sec->msg_enable) |
| printf("\tmsg_enable = 0x%x\n", |
| sec->msg_enable); |
| if (sec->clear_screen) |
| printf("\tclear_screen = 0x%x\n", |
| sec->clear_screen); |
| if (sec->color_flip) |
| printf("\tcolor_flip = 0x%x\n", |
| sec->color_flip); |
| if (sec->download_ext_vbt) |
| printf |
| ("\tdownload_ext_vbt = 0x%x\n", |
| sec->download_ext_vbt); |
| printf("\t*enable_ssc = 0x%x\n", |
| sec->enable_ssc); |
| printf("\t*ssc_freq = 0x%x\n", |
| sec->ssc_freq); |
| if (sec->enable_lfp_on_override) |
| printf |
| ("\tenable_lfp_on_override = 0x%x\n", |
| sec->enable_lfp_on_override); |
| if (sec->disable_ssc_ddt) |
| printf |
| ("\tdisable_ssc_ddt = 0x%x\n", |
| sec->disable_ssc_ddt); |
| if (sec->rsvd7) |
| printf("\trsvd7 = 0x%x\n", |
| sec->rsvd7); |
| printf("\t*display_clock_mode = 0x%x\n", |
| sec->display_clock_mode); |
| if (sec->rsvd8) |
| printf("\trsvd8 = 0x%x\n", |
| sec->rsvd8); |
| printf("\tdisable_smooth_vision = 0x%x\n", |
| sec->disable_smooth_vision); |
| if (sec->single_dvi) |
| printf("\tsingle_dvi = 0x%x\n", |
| sec->single_dvi); |
| if (sec->rsvd9) |
| printf("\trsvd9 = 0x%x\n", |
| sec->rsvd9); |
| printf |
| ("\t*fdi_rx_polarity_inverted = 0x%x\n", |
| sec->fdi_rx_polarity_inverted); |
| if (sec->rsvd10) |
| printf("\trsvd10 = 0x%x\n", |
| sec->rsvd10); |
| if (sec->legacy_monitor_detect) |
| printf |
| ("\tlegacy_monitor_detect = 0x%x\n", |
| sec->legacy_monitor_detect); |
| printf("\t*int_crt_support = 0x%x\n", |
| sec->int_crt_support); |
| printf("\t*int_tv_support = 0x%x\n", |
| sec->int_tv_support); |
| if (sec->int_efp_support) |
| printf |
| ("\tint_efp_support = 0x%x\n", |
| sec->int_efp_support); |
| if (sec->dp_ssc_enb) |
| printf("\tdp_ssc_enb = 0x%x\n", |
| sec->dp_ssc_enb); |
| if (sec->dp_ssc_freq) |
| printf("\tdp_ssc_freq = 0x%x\n", |
| sec->dp_ssc_freq); |
| if (sec->rsvd11) |
| printf("\trsvd11 = 0x%x\n", |
| sec->rsvd11); |
| break; |
| } |
| case BDB_DRIVER_FEATURES:{ |
| const struct bdb_driver_features *sec = |
| (const void *) section; |
| printf("\t*LVDS config: %d\n", |
| sec->lvds_config); |
| printf("\t*Dual frequency: %d\n", |
| sec->dual_frequency); |
| |
| break; |
| } |
| case BDB_SDVO_LVDS_OPTIONS:{ |
| const struct bdb_sdvo_lvds_options *sec = |
| (const void *) section; |
| printf("\t*Panel type: %d\n", |
| sec->panel_type); |
| |
| break; |
| } |
| case BDB_GENERAL_DEFINITIONS:{ |
| const struct bdb_general_definitions *sec = |
| (const void *) section; |
| int ndev; |
| printf("\t*CRT DDC GMBUS pin: %d\n", |
| sec->crt_ddc_gmbus_pin); |
| |
| printf("\tDPMS ACPI: %d\n", |
| sec->dpms_acpi); |
| printf("\tSkip boot CRT detect: %d\n", |
| sec->skip_boot_crt_detect); |
| printf("\tDPMS aim: %d\n", sec->dpms_aim); |
| if (sec->rsvd1) |
| printf("\trsvd1: 0x%x\n", |
| sec->rsvd1); |
| printf("\tboot_display: { %x, %x }\n", |
| sec->boot_display[0], |
| sec->boot_display[1]); |
| if (sec->child_dev_size != |
| sizeof(struct common_child_dev_config)) |
| printf("\tchild_dev_size: %d\n", |
| sec->child_dev_size); |
| ndev = (secsz - sizeof(*sec)) / |
| sizeof(struct common_child_dev_config); |
| printf("\t%d devices\n", ndev); |
| for (i = 0; i < ndev; i++) { |
| printf("\t*device type: %x ", |
| sec->devices[i]. |
| device_type); |
| #define DEVICE_TYPE_INT_LFP 0x1022 |
| #define DEVICE_TYPE_INT_TV 0x1009 |
| #define DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR 0x6052 |
| switch (sec->devices[i].device_type) { |
| case DEVICE_TYPE_INT_LFP: |
| printf("(flat panel)\n"); |
| break; |
| case DEVICE_TYPE_INT_TV: |
| printf("(TV)\n"); |
| break; |
| case DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR: |
| printf |
| ("(DVI)\n"); |
| break; |
| case 0: |
| printf("(Empty)\n"); |
| break; |
| default: |
| printf("(Unknown)\n"); |
| break; |
| } |
| if (!sec->devices[i].device_type) |
| continue; |
| printf("\t *dvo_port: %x\n", |
| sec->devices[i].dvo_port); |
| printf("\t *i2c_pin: %x\n", |
| sec->devices[i].i2c_pin); |
| printf("\t *slave_addr: %x\n", |
| sec->devices[i].slave_addr); |
| printf("\t *ddc_pin: %x\n", |
| sec->devices[i].ddc_pin); |
| printf("\t *dvo_wiring: %x\n", |
| sec->devices[i].dvo_wiring); |
| printf("\t edid_ptr: %x\n", |
| sec->devices[i].edid_ptr); |
| } |
| |
| break; |
| } |
| case BDB_SKIP:{ |
| const struct vbios_data *sec = |
| (const void *) section; |
| if (!is_first_skip) |
| break; |
| is_first_skip = 0; |
| printf("\ttype: %x\n", sec->type); |
| printf("\trelstage: %x\n", sec->relstage); |
| printf("\tchipset: %x\n", sec->chipset); |
| printf(sec->lvds_present ? "\tLVDS\n" |
| : "\tNo LVDS\n"); |
| printf(sec->tv_present ? "\tTV\n" |
| : "\tNo TV\n"); |
| if (sec->rsvd2) |
| printf("\trsvd2: 0x%x\n", |
| sec->rsvd2); |
| for (i = 0; i < 4; i++) |
| if (sec->rsvd3[i]) |
| printf |
| ("\trsvd3[%d]: 0x%x\n", |
| i, sec->rsvd3[i]); |
| printf("\tSignon: %.155s\n", sec->signon); |
| printf("\tCopyright: %.155s\n", |
| sec->copyright); |
| printf("\tCode segment: %x\n", |
| sec->code_segment); |
| printf("\tDOS Boot mode: %x\n", |
| sec->dos_boot_mode); |
| printf("\tBandwidth percent: %x\n", |
| sec->bandwidth_percent); |
| if (sec->rsvd4) |
| printf("\trsvd4: 0x%x\n", |
| sec->rsvd4); |
| printf("\tBandwidth percent: %x\n", |
| sec->resize_pci_bios); |
| if (sec->rsvd5) |
| printf("\trsvd5: 0x%x\n", |
| sec->rsvd5); |
| break; |
| } |
| } |
| } |
| |
| } |
| |
| static void parse_vbios(const void *ptr) |
| { |
| const optionrom_header_t *oh; |
| oh = ptr; |
| if (oh->signature != 0xaa55) { |
| fprintf(stderr, "bad oprom signature: %x\n", |
| oh->signature); |
| return; |
| } |
| if (!oh->vbt_offset) { |
| fprintf(stderr, "no VBT found\n"); |
| return; |
| } |
| parse_vbt((const char *) ptr + oh->vbt_offset); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| const void *ptr; |
| int fd; |
| off_t offset; |
| if (argc == 2) { |
| fd = open(argv[1], O_RDONLY); |
| offset = 0; |
| } else { |
| fd = open("/dev/mem", O_RDONLY); |
| offset = 0xc0000; |
| } |
| if (fd < 0) { |
| fprintf(stderr, "open failed: %s\n", strerror(errno)); |
| return 1; |
| } |
| |
| ptr = mmap(0, 65536, PROT_READ, MAP_SHARED, fd, offset); |
| if (ptr == MAP_FAILED) { |
| fprintf(stderr, "mmap failed: %s\n", strerror(errno)); |
| return 1; |
| } |
| parse_vbios(ptr); |
| close(fd); |
| return 0; |
| } |