| // Hooks for via vgabios calls into main bios. |
| // |
| // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "bregs.h" // set_code_invalid |
| #include "biosvar.h" // GET_GLOBAL |
| #include "pci.h" // pci_find_device |
| #include "pci_regs.h" // PCI_VENDOR_ID |
| #include "pci_ids.h" // PCI_VENDOR_ID_VIA |
| #include "util.h" // handle_155f |
| #include "config.h" // CONFIG_* |
| |
| // The Bus/Dev/Fn of the primary VGA device. |
| int VGAbdf VAR16VISIBLE = -1; |
| // Coreboot board detected. |
| int CBmainboard VAR16VISIBLE; |
| |
| #define MAINBOARD_DEFAULT 0 |
| #define KONTRON_986LCD_M 1 |
| #define GETAC_P470 2 |
| #define RODA_RK886EX 3 |
| #define GOOGLE_CR48 4 |
| #define SAMSUNG_ALEX 5 |
| |
| struct mainboards { |
| char *vendor; |
| char *device; |
| int type; |
| }; |
| |
| struct mainboards mainboard_list[] = { |
| { "KONTRON", "986LCD-M", KONTRON_986LCD_M }, |
| { "GETAC", "P470", GETAC_P470 }, |
| { "RODA", "RK886EX", RODA_RK886EX }, |
| { "Google", "CR-48", GOOGLE_CR48 }, |
| { "Samsung", "Alex", SAMSUNG_ALEX }, |
| }; |
| |
| static void |
| handle_155fXX(struct bregs *regs) |
| { |
| set_code_unimplemented(regs, RET_EUNSUPPORTED); |
| } |
| |
| |
| /**************************************************************** |
| * Via hooks |
| ****************************************************************/ |
| |
| static void |
| via_155f01(struct bregs *regs) |
| { |
| regs->eax = 0x5f; |
| regs->cl = 2; // panel type = 2 = 1024 * 768 |
| set_success(regs); |
| dprintf(1, "Warning: VGA panel type is hardcoded\n"); |
| } |
| |
| static void |
| via_155f02(struct bregs *regs) |
| { |
| regs->eax = 0x5f; |
| regs->bx = 2; |
| regs->cx = 0x401; // PAL + crt only |
| regs->dx = 0; // TV Layout - default |
| set_success(regs); |
| dprintf(1, "Warning: VGA TV/CRT output type is hardcoded\n"); |
| } |
| |
| static int |
| getFBSize(u16 bdf) |
| { |
| /* FB config */ |
| u8 reg = pci_config_readb(bdf, 0xa1); |
| |
| /* GFX disabled ? */ |
| if (!(reg & 0x80)) |
| return -1; |
| |
| static u8 mem_power[] VAR16 = {0, 3, 4, 5, 6, 7, 8, 9}; |
| return GET_GLOBAL(mem_power[(reg >> 4) & 0x7]); |
| } |
| |
| static int |
| getViaRamSpeed(u16 bdf) |
| { |
| return (pci_config_readb(bdf, 0x90) & 0x07) + 3; |
| } |
| |
| static int |
| getAMDRamSpeed(void) |
| { |
| int bdf = pci_find_device(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MEMCTL); |
| if (bdf < 0) |
| return -1; |
| |
| /* mem clk 0 = DDR2 400 */ |
| return (pci_config_readb(bdf, 0x94) & 0x7) + 6; |
| } |
| |
| /* int 0x15 - 5f18 |
| |
| ECX = unknown/dont care |
| EBX[3..0] Frame Buffer Size 2^N MiB |
| EBX[7..4] Memory speed: |
| 0: SDR 66Mhz |
| 1: SDR 100Mhz |
| 2: SDR 133Mhz |
| 3: DDR 100Mhz (PC1600 or DDR200) |
| 4: DDR 133Mhz (PC2100 or DDR266) |
| 5: DDR 166Mhz (PC2700 or DDR333) |
| 6: DDR 200Mhz (PC3200 or DDR400) |
| 7: DDR2 133Mhz (DDR2 533) |
| 8: DDR2 166Mhz (DDR2 667) |
| 9: DDR2 200Mhz (DDR2 800) |
| A: DDR2 233Mhz (DDR2 1066) |
| B: and above: Unknown |
| EBX[?..8] Total memory size? |
| EAX = 0x5f for success |
| */ |
| |
| #define PCI_DEVICE_ID_VIA_K8M890CE_3 0x3336 |
| #define PCI_DEVICE_ID_VIA_VX855_MEMCTRL 0x3409 |
| |
| static void |
| via_155f18(struct bregs *regs) |
| { |
| int ramspeed, fbsize; |
| |
| int bdf = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M890CE_3); |
| if (bdf >= 0) { |
| fbsize = getFBSize(bdf); |
| ramspeed = getAMDRamSpeed(); |
| goto done; |
| } |
| bdf = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX855_MEMCTRL); |
| if (bdf >= 0) { |
| fbsize = getFBSize(bdf); |
| ramspeed = getViaRamSpeed(bdf); |
| goto done; |
| } |
| |
| dprintf(1, "Warning: VGA memory size and speed is hardcoded\n"); |
| fbsize = 5; // 32M frame buffer |
| ramspeed = 4; // MCLK = DDR266 |
| |
| done: |
| if (fbsize < 0 || ramspeed < 0) { |
| set_code_invalid(regs, RET_EUNSUPPORTED); |
| return; |
| } |
| regs->eax = 0x5f; |
| regs->ebx = 0x500 | (ramspeed << 4) | fbsize; |
| regs->ecx = 0x060; |
| set_success(regs); |
| } |
| |
| static void |
| via_155f19(struct bregs *regs) |
| { |
| set_invalid_silent(regs); |
| } |
| |
| static void |
| via_155f(struct bregs *regs) |
| { |
| switch (regs->al) { |
| case 0x01: via_155f01(regs); break; |
| case 0x02: via_155f02(regs); break; |
| case 0x18: via_155f18(regs); break; |
| case 0x19: via_155f19(regs); break; |
| default: handle_155fXX(regs); break; |
| } |
| } |
| |
| /**************************************************************** |
| * Intel VGA hooks |
| ****************************************************************/ |
| #define BOOT_DISPLAY_DEFAULT (0) |
| #define BOOT_DISPLAY_CRT (1 << 0) |
| #define BOOT_DISPLAY_TV (1 << 1) |
| #define BOOT_DISPLAY_EFP (1 << 2) |
| #define BOOT_DISPLAY_LCD (1 << 3) |
| #define BOOT_DISPLAY_CRT2 (1 << 4) |
| #define BOOT_DISPLAY_TV2 (1 << 5) |
| #define BOOT_DISPLAY_EFP2 (1 << 6) |
| #define BOOT_DISPLAY_LCD2 (1 << 7) |
| |
| static void |
| roda_155f35(struct bregs *regs) |
| { |
| regs->ax = 0x005f; |
| // regs->cl = BOOT_DISPLAY_DEFAULT; |
| regs->cl = BOOT_DISPLAY_LCD; |
| set_success(regs); |
| } |
| |
| static void |
| roda_155f40(struct bregs *regs) |
| { |
| u8 display_id; |
| //display_id = inb(0x60f) & 0x0f; // Correct according to Crete |
| display_id = 3; // Correct according to empirical studies |
| |
| regs->ax = 0x005f; |
| regs->cl = display_id; |
| set_success(regs); |
| } |
| |
| static void |
| roda_155f(struct bregs *regs) |
| { |
| dprintf(1, "Executing RODA specific interrupt %02x.\n", regs->al); |
| switch (regs->al) { |
| case 0x35: roda_155f35(regs); break; |
| case 0x40: roda_155f40(regs); break; |
| default: handle_155fXX(regs); break; |
| } |
| } |
| |
| static void |
| kontron_155f35(struct bregs *regs) |
| { |
| regs->ax = 0x005f; |
| regs->cl = BOOT_DISPLAY_CRT; |
| set_success(regs); |
| } |
| |
| static void |
| kontron_155f40(struct bregs *regs) |
| { |
| u8 display_id; |
| display_id = 3; |
| |
| regs->ax = 0x005f; |
| regs->cl = display_id; |
| set_success(regs); |
| } |
| |
| static void |
| kontron_155f(struct bregs *regs) |
| { |
| dprintf(1, "Executing Kontron specific interrupt %02x.\n", regs->al); |
| switch (regs->al) { |
| case 0x35: kontron_155f35(regs); break; |
| case 0x40: kontron_155f40(regs); break; |
| default: handle_155fXX(regs); break; |
| } |
| } |
| |
| static void |
| getac_155f(struct bregs *regs) |
| { |
| dprintf(1, "Executing Getac specific interrupt %02x.\n", regs->al); |
| switch (regs->al) { |
| default: handle_155fXX(regs); break; |
| } |
| } |
| |
| static void |
| google_155f(struct bregs *regs) |
| { |
| dprintf(1, "Executing Google specific interrupt %02x.\n", regs->al); |
| switch (regs->al) { |
| case 0x21: |
| case 0x22: |
| regs->ax = 0x005f; |
| set_success(regs); |
| break; |
| default: handle_155fXX(regs); break; |
| } |
| } |
| |
| |
| /**************************************************************** |
| * Entry and setup |
| ****************************************************************/ |
| |
| // Main 16bit entry point |
| void |
| handle_155f(struct bregs *regs) |
| { |
| int bdf, cbmb; |
| |
| if (! CONFIG_VGAHOOKS) |
| goto fail; |
| |
| cbmb = GET_GLOBAL(CBmainboard); |
| |
| switch (cbmb) { |
| case KONTRON_986LCD_M: |
| kontron_155f(regs); |
| return; |
| case RODA_RK886EX: |
| roda_155f(regs); |
| return; |
| case GETAC_P470: |
| getac_155f(regs); |
| return; |
| case GOOGLE_CR48: |
| case SAMSUNG_ALEX: |
| google_155f(regs); |
| return; |
| case MAINBOARD_DEFAULT: |
| bdf = GET_GLOBAL(VGAbdf); |
| if (bdf < 0) |
| goto fail; |
| |
| u16 vendor = pci_config_readw(bdf, PCI_VENDOR_ID); |
| if (vendor == PCI_VENDOR_ID_VIA) { |
| via_155f(regs); |
| return; |
| } |
| } |
| |
| fail: |
| handle_155fXX(regs); |
| } |
| |
| // Setup |
| void |
| vgahook_setup(const char *vendor, const char *part) |
| { |
| int i; |
| |
| if (! CONFIG_VGAHOOKS) |
| return; |
| |
| for (i=0; i<(sizeof(mainboard_list) / sizeof(mainboard_list[0])); i++) { |
| if (!strcmp(vendor, mainboard_list[i].vendor) && |
| !strcmp(part, mainboard_list[i].device)) { |
| CBmainboard = mainboard_list[i].type; |
| break; |
| } |
| } |
| } |