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author | Patrick Georgi <patrick.georgi@secunet.com> | 2012-11-06 11:03:53 +0100 |
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committer | Patrick Georgi <patrick@georgi-clan.de> | 2012-11-27 09:16:18 +0100 |
commit | 2efc8808b8bfaee0a0e8f3ee387ecd9a3f049705 (patch) | |
tree | c486b184f7609b42b3de3d5cd5d213226820a278 /src/northbridge/intel/gm45/igd.c | |
parent | acd7d952514485dbc41fa04b0d16be4002e31019 (diff) | |
download | coreboot-2efc8808b8bfaee0a0e8f3ee387ecd9a3f049705.tar.xz |
intel/gm45: new northbridge
The code supports DDR3 boards only. RAM init for DDR2 is sufficiently
different that it requires separate code, and we have no boards to
test that.
Change-Id: I9076546faf8a2033c89eb95f5eec524439ab9fe1
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1689
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/northbridge/intel/gm45/igd.c')
-rw-r--r-- | src/northbridge/intel/gm45/igd.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/northbridge/intel/gm45/igd.c b/src/northbridge/intel/gm45/igd.c new file mode 100644 index 0000000000..c07fdfc26b --- /dev/null +++ b/src/northbridge/intel/gm45/igd.c @@ -0,0 +1,154 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 secunet Security Networks AG + * + * 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., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <stdint.h> +#include <stddef.h> +#include <arch/io.h> +#include <arch/romcc_io.h> +#include <device/pci_def.h> +#include <console/console.h> + +#include "gm45.h" + +/* TODO: Chipset supports Protected Audio Video Path (PAVP) */ + +/* TODO: We could pass DVMT structure in GetBIOSData() SCI interface */ + +/* The PEG settings have to be set before ASPM is setup on DMI. */ +static void enable_igd(const sysinfo_t *const sysinfo, const int no_peg) +{ + const device_t mch_dev = PCI_DEV(0, 0, 0); + const device_t peg_dev = PCI_DEV(0, 1, 0); + const device_t igd_dev = PCI_DEV(0, 2, 0); + + u16 reg16; + u32 reg32; + + printk(BIOS_DEBUG, "Enabling IGD.\n"); + + /* HSync/VSync */ + MCHBAR8(0xbd0 + 3) = 0x5a; + MCHBAR8(0xbd0 + 4) = 0x5a; + + static const u16 display_clock_from_f0_and_vco[][4] = { + /* VCO 2666 VCO 3200 VCO 4000 VCO 5333 */ + { 222, 228, 222, 222, }, + { 333, 320, 333, 333, }, + }; + const int f0_12 = (pci_read_config16(igd_dev, 0xf0) >> 12) & 1; + const int vco = raminit_read_vco_index(); + reg16 = pci_read_config16(igd_dev, 0xcc); + reg16 &= 0xfc00; + reg16 |= display_clock_from_f0_and_vco[f0_12][vco]; + pci_write_config16(igd_dev, 0xcc, reg16); + + /* Graphics Stolen Memory: 2MB GTT (0x0300) when VT-d disabled, + 2MB GTT + 2MB shadow GTT (0x0b00) else. */ + /* Graphics Mode Select: 32MB framebuffer (0x0050) */ + /* TODO: We could switch to 64MB (0x0070), config flag? */ + const u32 capid = pci_read_config32(mch_dev, D0F0_CAPID0 + 4); + reg16 = pci_read_config16(mch_dev, D0F0_GGC); + reg16 &= 0xf00f; + reg16 |= 0x0350; + if (capid & (1 << (48 - 32))) + reg16 |= 0x0800; + pci_write_config16(mch_dev, D0F0_GGC, reg16); + + if ((sysinfo->gfx_type != GMCH_GL40) && + (sysinfo->gfx_type != GMCH_GS40) && + (sysinfo->gfx_type != GMCH_GL43)) { + const u32 deven = pci_read_config32(mch_dev, D0F0_DEVEN); + if (!(deven & 2)) + /* Enable PEG temporarily to access D1:F0. */ + pci_write_config32(mch_dev, D0F0_DEVEN, deven | 2); + + /* Some IGD related settings on D1:F0. */ + reg16 = pci_read_config16(peg_dev, 0xa08); + reg16 &= ~(1 << 15); + pci_write_config16(peg_dev, 0xa08, reg16); + + reg16 = pci_read_config16(peg_dev, 0xa84); + reg16 |= (1 << 8); + pci_write_config16(peg_dev, 0xa84, reg16); + + reg16 = pci_read_config16(peg_dev, 0xb00); + reg16 |= (3 << 8) | (7 << 3); + pci_write_config16(peg_dev, 0xb00, reg16); + + reg32 = pci_read_config32(peg_dev, 0xb14); + reg32 &= ~(1 << 17); + pci_write_config32(peg_dev, 0xb14, reg32); + + if (!(deven & 2) || no_peg) { + /* Disable PEG finally. */ + printk(BIOS_DEBUG, "Finally disabling " + "PEG in favor of IGD.\n"); + MCHBAR8(0xc14) |= (1 << 5) | (1 << 0); + + reg32 = pci_read_config32(peg_dev, 0x200); + reg32 |= (1 << 18); + pci_write_config32(peg_dev, 0x200, reg32); + reg16 = pci_read_config16(peg_dev, 0x224); + reg16 |= (1 << 8); + pci_write_config16(peg_dev, 0x224, reg16); + reg32 = pci_read_config32(peg_dev, 0x200); + reg32 &= ~(1 << 18); + pci_write_config32(peg_dev, 0x200, reg32); + while (pci_read_config32(peg_dev, 0x214) & 0x000f0000); + + pci_write_config32(mch_dev, D0F0_DEVEN, deven & ~2); + MCHBAR8(0xc14) &= ~((1 << 5) | (1 << 0)); + } + } +} + +static void disable_igd(const sysinfo_t *const sysinfo) +{ + const device_t mch_dev = PCI_DEV(0, 0, 0); + + printk(BIOS_DEBUG, "Disabling IGD.\n"); + + u16 reg16; + + reg16 = pci_read_config16(mch_dev, D0F0_GGC); + reg16 &= 0xff0f; /* Disable Graphics Stolen Memory. */ + reg16 |= 0x0002; /* Disable IGD. */ + pci_write_config16(mch_dev, D0F0_GGC, reg16); + MCHBAR8(0xf10) |= (1 << 0); + + if (!(pci_read_config8(mch_dev, D0F0_CAPID0 + 4) & (1 << (33 - 32)))) { + MCHBAR16(0x1190) |= (1 << 14); + MCHBAR16(0x119e) = (MCHBAR16(0x119e) & ~(7 << 13)) | (4 << 13); + MCHBAR16(0x119e) |= (1 << 12); + } +} + +void init_igd(const sysinfo_t *const sysinfo, + const int no_igd, const int no_peg) +{ + const device_t mch_dev = PCI_DEV(0, 0, 0); + + const u8 capid = pci_read_config8(mch_dev, D0F0_CAPID0 + 4); + if (no_igd || (capid & (1 << (33 - 32)))) + disable_igd(sysinfo); + else + enable_igd(sysinfo, no_peg); +} |