| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2010 coresystems GmbH |
| * |
| * 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 <cf9_reset.h> |
| #include <console/console.h> |
| #include <arch/io.h> |
| #include <device/pci.h> |
| #include <device/pci_ops.h> |
| #include <device/pci_def.h> |
| #include <cbmem.h> |
| #include <romstage_handoff.h> |
| #include <option.h> |
| #include <types.h> |
| |
| #include "i945.h" |
| |
| int i945_silicon_revision(void) |
| { |
| return pci_read_config8(PCI_DEV(0, 0x00, 0), PCI_CLASS_REVISION); |
| } |
| |
| static void i945m_detect_chipset(void) |
| { |
| u8 reg8; |
| |
| printk(BIOS_INFO, "\n"); |
| reg8 = (pci_read_config8(PCI_DEV(0, 0x00, 0), 0xe7) & 0x70) >> 4; |
| switch (reg8) { |
| case 1: |
| printk(BIOS_INFO, "Mobile Intel(R) 82945GM/GME Express"); |
| break; |
| case 2: |
| printk(BIOS_INFO, "Mobile Intel(R) 82945GMS/GU/GSE Express"); |
| break; |
| case 3: |
| printk(BIOS_INFO, "Mobile Intel(R) 82945PM Express"); |
| break; |
| case 5: |
| printk(BIOS_INFO, "Intel(R) 82945GT Express"); |
| break; |
| case 6: |
| printk(BIOS_INFO, "Mobile Intel(R) 82943/82940GML Express"); |
| break; |
| default: |
| printk(BIOS_INFO, "Unknown (%02x)", reg8); /* Others reserved. */ |
| } |
| printk(BIOS_INFO, " Chipset\n"); |
| |
| printk(BIOS_DEBUG, "(G)MCH capable of up to FSB "); |
| reg8 = (pci_read_config8(PCI_DEV(0, 0x00, 0), 0xe3) & 0xe0) >> 5; |
| switch (reg8) { |
| case 2: |
| printk(BIOS_DEBUG, "800 MHz"); /* According to 965 spec */ |
| break; |
| case 3: |
| printk(BIOS_DEBUG, "667 MHz"); |
| break; |
| case 4: |
| printk(BIOS_DEBUG, "533 MHz"); |
| break; |
| default: |
| printk(BIOS_DEBUG, "N/A MHz (%02x)", reg8); |
| } |
| printk(BIOS_DEBUG, "\n"); |
| |
| printk(BIOS_DEBUG, "(G)MCH capable of "); |
| reg8 = (pci_read_config8(PCI_DEV(0, 0x00, 0), 0xe4) & 0x07); |
| switch (reg8) { |
| case 2: |
| printk(BIOS_DEBUG, "up to DDR2-667"); |
| break; |
| case 3: |
| printk(BIOS_DEBUG, "up to DDR2-533"); |
| break; |
| case 4: |
| printk(BIOS_DEBUG, "DDR2-400"); |
| break; |
| default: |
| printk(BIOS_INFO, "unknown max. RAM clock (%02x).", reg8); /* Others reserved. */ |
| } |
| printk(BIOS_DEBUG, "\n"); |
| |
| if (CONFIG(NORTHBRIDGE_INTEL_SUBTYPE_I945GC)) |
| printk(BIOS_ERR, "coreboot is compiled for the wrong chipset.\n"); |
| } |
| |
| static void i945_detect_chipset(void) |
| { |
| u8 reg8; |
| |
| printk(BIOS_INFO, "\nIntel(R) "); |
| |
| reg8 = ((pci_read_config8(PCI_DEV(0, 0x00, 0), 0xe7) >> 5) & 4) | ((pci_read_config8(PCI_DEV(0, 0x00, 0), 0xe4) >> 4) & 3); |
| switch (reg8) { |
| case 0: |
| case 1: |
| printk(BIOS_INFO, "82945G"); |
| break; |
| case 2: |
| case 3: |
| printk(BIOS_INFO, "82945P"); |
| break; |
| case 4: |
| printk(BIOS_INFO, "82945GC"); |
| break; |
| case 5: |
| printk(BIOS_INFO, "82945GZ"); |
| break; |
| case 6: |
| case 7: |
| printk(BIOS_INFO, "82945PL"); |
| break; |
| default: |
| break; |
| } |
| printk(BIOS_INFO, " Chipset\n"); |
| |
| printk(BIOS_DEBUG, "(G)MCH capable of "); |
| reg8 = (pci_read_config8(PCI_DEV(0, 0x00, 0), 0xe4) & 0x07); |
| switch (reg8) { |
| case 0: |
| case 2: |
| printk(BIOS_DEBUG, "up to DDR2-667"); |
| break; |
| case 3: |
| printk(BIOS_DEBUG, "up to DDR2-533"); |
| break; |
| default: |
| printk(BIOS_INFO, "unknown max. RAM clock (%02x).", reg8); /* Others reserved. */ |
| } |
| printk(BIOS_DEBUG, "\n"); |
| |
| if (CONFIG(NORTHBRIDGE_INTEL_SUBTYPE_I945GM)) |
| printk(BIOS_ERR, "coreboot is compiled for the wrong chipset.\n"); |
| } |
| |
| static void i945_setup_bars(void) |
| { |
| u8 reg8, gfxsize; |
| |
| /* As of now, we don't have all the A0 workarounds implemented */ |
| if (i945_silicon_revision() == 0) |
| printk(BIOS_INFO, "Warning: i945 silicon revision A0 might not work correctly.\n"); |
| |
| printk(BIOS_DEBUG, "Setting up static northbridge registers..."); |
| /* Set up all hardcoded northbridge BARs */ |
| pci_write_config32(PCI_DEV(0, 0x00, 0), EPBAR, DEFAULT_EPBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), MCHBAR, (uintptr_t)DEFAULT_MCHBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR, (uintptr_t)DEFAULT_DMIBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), X60BAR, DEFAULT_X60BAR | 1); |
| |
| /* vram size from CMOS option */ |
| if (get_option(&gfxsize, "gfx_uma_size") != CB_SUCCESS) |
| gfxsize = 2; /* 2 for 8MB */ |
| /* make sure no invalid setting is used */ |
| if (gfxsize > 6) |
| gfxsize = 2; |
| pci_write_config16(PCI_DEV(0, 0x00, 0), GGC, ((gfxsize + 1) << 4)); |
| /* TSEG 2M, This amount can easily be covered by SMRR MTRR's, |
| which requires to have TSEG_BASE aligned to TSEG_SIZE. */ |
| reg8 = pci_read_config8(PCI_DEV(0, 0, 0), ESMRAMC); |
| reg8 &= ~0x7; |
| reg8 |= (1 << 1) | (1 << 0); /* 2M and TSEG_Enable */ |
| pci_write_config8(PCI_DEV(0, 0, 0), ESMRAMC, reg8); |
| |
| /* Set C0000-FFFFF to access RAM on both reads and writes */ |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM0, 0x30); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM1, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM2, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM3, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM4, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM5, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM6, 0x33); |
| |
| printk(BIOS_DEBUG, " done.\n"); |
| |
| /* Wait for MCH BAR to come up */ |
| printk(BIOS_DEBUG, "Waiting for MCHBAR to come up..."); |
| if ((pci_read_config32(PCI_DEV(0, 0x00, 0), 0xe4) & 0x20000) == 0x00) { /* Bit 49 of CAPID0 */ |
| do { |
| reg8 = *(volatile u8 *)0xfed40000; |
| } while (!(reg8 & 0x80)); |
| } |
| printk(BIOS_DEBUG, "ok\n"); |
| } |
| |
| static void i945_setup_egress_port(void) |
| { |
| u32 reg32; |
| u32 timeout; |
| |
| printk(BIOS_DEBUG, "Setting up Egress Port RCRB\n"); |
| |
| /* Egress Port Virtual Channel 0 Configuration */ |
| |
| /* map only TC0 to VC0 */ |
| reg32 = EPBAR32(EPVC0RCTL); |
| reg32 &= 0xffffff01; |
| EPBAR32(EPVC0RCTL) = reg32; |
| |
| reg32 = EPBAR32(EPPVCCAP1); |
| reg32 &= ~(7 << 0); |
| reg32 |= 1; |
| EPBAR32(EPPVCCAP1) = reg32; |
| |
| /* Egress Port Virtual Channel 1 Configuration */ |
| reg32 = EPBAR32(0x2c); |
| reg32 &= 0xffffff00; |
| if (CONFIG(NORTHBRIDGE_INTEL_SUBTYPE_I945GC)) { |
| if ((MCHBAR32(CLKCFG) & 7) == 0) |
| reg32 |= 0x1a; /* 1067MHz */ |
| } |
| if ((MCHBAR32(CLKCFG) & 7) == 1) |
| reg32 |= 0x0d; /* 533MHz */ |
| if ((MCHBAR32(CLKCFG) & 7) == 2) |
| reg32 |= 0x14; /* 800MHz */ |
| if ((MCHBAR32(CLKCFG) & 7) == 3) |
| reg32 |= 0x10; /* 667MHz */ |
| EPBAR32(0x2c) = reg32; |
| |
| EPBAR32(EPVC1MTS) = 0x0a0a0a0a; |
| |
| reg32 = EPBAR32(EPVC1RCAP); |
| reg32 &= ~(0x7f << 16); |
| reg32 |= (0x0a << 16); |
| EPBAR32(EPVC1RCAP) = reg32; |
| |
| if (CONFIG(NORTHBRIDGE_INTEL_SUBTYPE_I945GC)) { |
| if ((MCHBAR32(CLKCFG) & 7) == 0) { /* 1067MHz */ |
| EPBAR32(EPVC1IST + 0) = 0x01380138; |
| EPBAR32(EPVC1IST + 4) = 0x01380138; |
| } |
| } |
| |
| if ((MCHBAR32(CLKCFG) & 7) == 1) { /* 533MHz */ |
| EPBAR32(EPVC1IST + 0) = 0x009c009c; |
| EPBAR32(EPVC1IST + 4) = 0x009c009c; |
| } |
| |
| if ((MCHBAR32(CLKCFG) & 7) == 2) { /* 800MHz */ |
| EPBAR32(EPVC1IST + 0) = 0x00f000f0; |
| EPBAR32(EPVC1IST + 4) = 0x00f000f0; |
| } |
| |
| if ((MCHBAR32(CLKCFG) & 7) == 3) { /* 667MHz */ |
| EPBAR32(EPVC1IST + 0) = 0x00c000c0; |
| EPBAR32(EPVC1IST + 4) = 0x00c000c0; |
| } |
| |
| /* Is internal graphics enabled? */ |
| if (pci_read_config8(PCI_DEV(0, 0x0, 0), DEVEN) & (DEVEN_D2F0 | DEVEN_D2F1)) |
| MCHBAR32(MMARB1) |= (1 << 17); |
| |
| /* Assign Virtual Channel ID 1 to VC1 */ |
| reg32 = EPBAR32(EPVC1RCTL); |
| reg32 &= ~(7 << 24); |
| reg32 |= (1 << 24); |
| EPBAR32(EPVC1RCTL) = reg32; |
| |
| reg32 = EPBAR32(EPVC1RCTL); |
| reg32 &= 0xffffff01; |
| reg32 |= (1 << 7); |
| EPBAR32(EPVC1RCTL) = reg32; |
| |
| EPBAR32(PORTARB + 0x00) = 0x01000001; |
| EPBAR32(PORTARB + 0x04) = 0x00040000; |
| EPBAR32(PORTARB + 0x08) = 0x00001000; |
| EPBAR32(PORTARB + 0x0c) = 0x00000040; |
| EPBAR32(PORTARB + 0x10) = 0x01000001; |
| EPBAR32(PORTARB + 0x14) = 0x00040000; |
| EPBAR32(PORTARB + 0x18) = 0x00001000; |
| EPBAR32(PORTARB + 0x1c) = 0x00000040; |
| |
| EPBAR32(EPVC1RCTL) |= (1 << 16); |
| EPBAR32(EPVC1RCTL) |= (1 << 16); |
| |
| printk(BIOS_DEBUG, "Loading port arbitration table ..."); |
| /* Loop until bit 0 becomes 0 */ |
| timeout = 0x7fffff; |
| while ((EPBAR16(EPVC1RSTS) & 1) && --timeout) |
| ; |
| if (!timeout) |
| printk(BIOS_DEBUG, "timeout!\n"); |
| else |
| printk(BIOS_DEBUG, "ok\n"); |
| |
| /* Now enable VC1 */ |
| EPBAR32(EPVC1RCTL) |= (1 << 31); |
| |
| printk(BIOS_DEBUG, "Wait for VC1 negotiation ..."); |
| /* Wait for VC1 negotiation pending */ |
| timeout = 0x7fff; |
| while ((EPBAR16(EPVC1RSTS) & (1 << 1)) && --timeout) |
| ; |
| if (!timeout) |
| printk(BIOS_DEBUG, "timeout!\n"); |
| else |
| printk(BIOS_DEBUG, "ok\n"); |
| |
| } |
| |
| static void ich7_setup_dmi_rcrb(void) |
| { |
| u16 reg16; |
| u32 reg32; |
| |
| reg16 = RCBA16(LCTL); |
| reg16 &= ~(3 << 0); |
| reg16 |= 3; |
| RCBA16(LCTL) = reg16; |
| |
| RCBA32(V0CTL) = 0x80000001; |
| RCBA32(V1CAP) = 0x03128010; |
| |
| pci_write_config16(PCI_DEV(0, 0x1c, 0), 0x42, 0x0141); |
| pci_write_config16(PCI_DEV(0, 0x1c, 4), 0x42, 0x0141); |
| pci_write_config16(PCI_DEV(0, 0x1c, 5), 0x42, 0x0141); |
| |
| pci_write_config32(PCI_DEV(0, 0x1c, 4), 0x54, 0x00480ce0); |
| pci_write_config32(PCI_DEV(0, 0x1c, 5), 0x54, 0x00500ce0); |
| |
| reg32 = RCBA32(V1CTL); |
| reg32 &= ~((0x7f << 1) | (7 << 17) | (7 << 24)); |
| reg32 |= (0x40 << 1) | (4 << 17) | (1 << 24) | (1 << 31); |
| RCBA32(V1CTL) = reg32; |
| |
| RCBA32(LCAP) |= (3 << 10); |
| } |
| |
| static void i945_setup_dmi_rcrb(void) |
| { |
| u32 reg32; |
| u32 timeout; |
| int activate_aspm = 1; /* hardcode ASPM for now */ |
| |
| printk(BIOS_DEBUG, "Setting up DMI RCRB\n"); |
| |
| /* Virtual Channel 0 Configuration */ |
| reg32 = DMIBAR32(DMIVC0RCTL0); |
| reg32 &= 0xffffff01; |
| DMIBAR32(DMIVC0RCTL0) = reg32; |
| |
| reg32 = DMIBAR32(DMIPVCCAP1); |
| reg32 &= ~(7 << 0); |
| reg32 |= 1; |
| DMIBAR32(DMIPVCCAP1) = reg32; |
| |
| reg32 = DMIBAR32(DMIVC1RCTL); |
| reg32 &= ~(7 << 24); |
| reg32 |= (1 << 24); /* NOTE: This ID must match ICH7 side */ |
| DMIBAR32(DMIVC1RCTL) = reg32; |
| |
| reg32 = DMIBAR32(DMIVC1RCTL); |
| reg32 &= 0xffffff01; |
| reg32 |= (1 << 7); |
| DMIBAR32(DMIVC1RCTL) = reg32; |
| |
| /* Now enable VC1 */ |
| DMIBAR32(DMIVC1RCTL) |= (1 << 31); |
| |
| printk(BIOS_DEBUG, "Wait for VC1 negotiation ..."); |
| /* Wait for VC1 negotiation pending */ |
| timeout = 0x7ffff; |
| while ((DMIBAR16(DMIVC1RSTS) & (1 << 1)) && --timeout) |
| ; |
| if (!timeout) |
| printk(BIOS_DEBUG, "timeout!\n"); |
| else |
| printk(BIOS_DEBUG, "done..\n"); |
| #if 1 |
| /* Enable Active State Power Management (ASPM) L0 state */ |
| |
| reg32 = DMIBAR32(DMILCAP); |
| reg32 &= ~(7 << 12); |
| reg32 |= (2 << 12); |
| |
| reg32 &= ~(7 << 15); |
| |
| reg32 |= (2 << 15); |
| DMIBAR32(DMILCAP) = reg32; |
| |
| reg32 = DMIBAR32(DMICC); |
| reg32 &= 0x00ffffff; |
| reg32 &= ~(3 << 0); |
| reg32 |= (1 << 0); |
| reg32 &= ~(3 << 20); |
| reg32 |= (1 << 20); |
| |
| DMIBAR32(DMICC) = reg32; |
| |
| if (activate_aspm) |
| DMIBAR32(DMILCTL) |= (3 << 0); |
| #endif |
| |
| /* Last but not least, some additional steps */ |
| reg32 = MCHBAR32(FSBSNPCTL); |
| reg32 &= ~(0xff << 2); |
| reg32 |= (0xaa << 2); |
| MCHBAR32(FSBSNPCTL) = reg32; |
| |
| DMIBAR32(0x2c) = 0x86000040; |
| |
| reg32 = DMIBAR32(0x204); |
| reg32 &= ~0x3ff; |
| #if 1 |
| reg32 |= 0x13f; /* for x4 DMI only */ |
| #else |
| reg32 |= 0x1e4; /* for x2 DMI only */ |
| #endif |
| DMIBAR32(0x204) = reg32; |
| |
| if (pci_read_config8(PCI_DEV(0, 0x0, 0), DEVEN) & (DEVEN_D2F0 | DEVEN_D2F1)) { |
| printk(BIOS_DEBUG, "Internal graphics: enabled\n"); |
| DMIBAR32(0x200) |= (1 << 21); |
| } else { |
| printk(BIOS_DEBUG, "Internal graphics: disabled\n"); |
| DMIBAR32(0x200) &= ~(1 << 21); |
| } |
| |
| reg32 = DMIBAR32(0x204); |
| reg32 &= ~((1 << 11) | (1 << 10)); |
| DMIBAR32(0x204) = reg32; |
| |
| reg32 = DMIBAR32(0x204); |
| reg32 &= ~(0xff << 12); |
| reg32 |= (0x0d << 12); |
| DMIBAR32(0x204) = reg32; |
| |
| DMIBAR32(DMICTL1) |= (3 << 24); |
| |
| reg32 = DMIBAR32(0x200); |
| reg32 &= ~(0x3 << 26); |
| reg32 |= (0x02 << 26); |
| DMIBAR32(0x200) = reg32; |
| |
| DMIBAR32(DMIDRCCFG) &= ~(1 << 31); |
| DMIBAR32(DMICTL2) |= (1 << 31); |
| |
| if (i945_silicon_revision() >= 3) { |
| reg32 = DMIBAR32(0xec0); |
| reg32 &= 0x0fffffff; |
| reg32 |= (2 << 28); |
| DMIBAR32(0xec0) = reg32; |
| |
| reg32 = DMIBAR32(0xed4); |
| reg32 &= 0x0fffffff; |
| reg32 |= (2 << 28); |
| DMIBAR32(0xed4) = reg32; |
| |
| reg32 = DMIBAR32(0xee8); |
| reg32 &= 0x0fffffff; |
| reg32 |= (2 << 28); |
| DMIBAR32(0xee8) = reg32; |
| |
| reg32 = DMIBAR32(0xefc); |
| reg32 &= 0x0fffffff; |
| reg32 |= (2 << 28); |
| DMIBAR32(0xefc) = reg32; |
| } |
| |
| /* wait for bit toggle to 0 */ |
| printk(BIOS_DEBUG, "Waiting for DMI hardware..."); |
| timeout = 0x7fffff; |
| while ((DMIBAR8(0x32) & (1 << 1)) && --timeout) |
| ; |
| if (!timeout) |
| printk(BIOS_DEBUG, "timeout!\n"); |
| else |
| printk(BIOS_DEBUG, "ok\n"); |
| |
| /* Clear Error Status Bits! */ |
| DMIBAR32(0x1c4) = 0xffffffff; |
| DMIBAR32(0x1d0) = 0xffffffff; |
| DMIBAR32(0x228) = 0xffffffff; |
| |
| /* Program Read-Only Write-Once Registers */ |
| DMIBAR32(0x308) = DMIBAR32(0x308); |
| DMIBAR32(0x314) = DMIBAR32(0x314); |
| DMIBAR32(0x324) = DMIBAR32(0x324); |
| DMIBAR32(0x328) = DMIBAR32(0x328); |
| DMIBAR32(0x334) = DMIBAR32(0x334); |
| DMIBAR32(0x338) = DMIBAR32(0x338); |
| |
| if (i945_silicon_revision() == 1 && (MCHBAR8(DFT_STRAP1) & (1 << 5))) { |
| if ((MCHBAR32(0x214) & 0xf) != 0x3) { |
| printk(BIOS_INFO, "DMI link requires A1 stepping workaround. Rebooting.\n"); |
| reg32 = DMIBAR32(0x224); |
| reg32 &= ~(7 << 0); |
| reg32 |= (3 << 0); |
| DMIBAR32(0x224) = reg32; |
| system_reset(); |
| } |
| } |
| } |
| |
| static void i945_setup_pci_express_x16(void) |
| { |
| u32 timeout; |
| u32 reg32; |
| u16 reg16; |
| pci_devfn_t p2peg = PCI_DEV(0, 0x01, 0); |
| |
| u8 tmp_secondary = 0x0a; |
| pci_devfn_t peg_plugin = PCI_DEV(tmp_secondary, 0, 0); |
| |
| printk(BIOS_DEBUG, "Enabling PCI Express x16 Link\n"); |
| |
| reg16 = pci_read_config16(PCI_DEV(0, 0x00, 0), DEVEN); |
| reg16 |= DEVEN_D1F0; |
| pci_write_config16(PCI_DEV(0, 0x00, 0), DEVEN, reg16); |
| |
| reg32 = pci_read_config32(p2peg, PEGCC); |
| reg32 &= ~(1 << 8); |
| pci_write_config32(p2peg, PEGCC, reg32); |
| |
| /* We have no success with querying the usual PCIe registers |
| * for link setup success on the i945. Hence we assign a temporary |
| * PCI bus 0x0a and check whether we find a device on 0:a.0 |
| */ |
| |
| /* Force PCIRST# */ |
| pci_s_assert_secondary_reset(p2peg); |
| pci_s_deassert_secondary_reset(p2peg); |
| |
| reg16 = pci_read_config16(p2peg, SLOTSTS); |
| printk(BIOS_DEBUG, "SLOTSTS: %04x\n", reg16); |
| if (!(reg16 & 0x48)) |
| goto disable_pciexpress_x16_link; |
| reg16 |= (1 << 4) | (1 << 0); |
| pci_write_config16(p2peg, SLOTSTS, reg16); |
| |
| pci_s_bridge_set_secondary(p2peg, tmp_secondary); |
| |
| reg32 = pci_read_config32(p2peg, 0x224); |
| reg32 &= ~(1 << 8); |
| pci_write_config32(p2peg, 0x224, reg32); |
| |
| MCHBAR16(UPMC1) &= ~((1 << 5) | (1 << 0)); |
| |
| /* Initialize PEG_CAP */ |
| reg16 = pci_read_config16(p2peg, PEG_CAP); |
| reg16 |= (1 << 8); |
| pci_write_config16(p2peg, PEG_CAP, reg16); |
| |
| /* Setup SLOTCAP */ |
| /* TODO: These values are mainboard dependent and should |
| * be set from devicetree.cb. |
| */ |
| /* NOTE: SLOTCAP becomes RO after the first write! */ |
| reg32 = pci_read_config32(p2peg, SLOTCAP); |
| reg32 &= 0x0007ffff; |
| |
| reg32 &= 0xfffe007f; |
| |
| pci_write_config32(p2peg, SLOTCAP, reg32); |
| |
| /* Wait for training to succeed */ |
| printk(BIOS_DEBUG, "PCIe link training ..."); |
| timeout = 0x7ffff; |
| while ((((pci_read_config32(p2peg, PEGSTS) >> 16) & 3) != 3) |
| && --timeout) |
| ; |
| |
| reg32 = pci_read_config32(peg_plugin, PCI_VENDOR_ID); |
| if (reg32 != 0x00000000 && reg32 != 0xffffffff) { |
| printk(BIOS_DEBUG, " Detected PCIe device %04x:%04x\n", |
| reg32 & 0xffff, reg32 >> 16); |
| } else { |
| printk(BIOS_DEBUG, " timeout!\n"); |
| |
| printk(BIOS_DEBUG, "Restrain PCIe port to x1\n"); |
| |
| reg32 = pci_read_config32(p2peg, PEGSTS); |
| reg32 &= ~(0xf << 1); |
| reg32 |= 1; |
| pci_write_config32(p2peg, PEGSTS, reg32); |
| |
| /* Force PCIRST# */ |
| pci_s_assert_secondary_reset(p2peg); |
| pci_s_deassert_secondary_reset(p2peg); |
| |
| printk(BIOS_DEBUG, "PCIe link training ..."); |
| timeout = 0x7ffff; |
| while ((((pci_read_config32(p2peg, PEGSTS) >> 16) & 3) != 3) |
| && --timeout) |
| ; |
| |
| reg32 = pci_read_config32(peg_plugin, PCI_VENDOR_ID); |
| if (reg32 != 0x00000000 && reg32 != 0xffffffff) { |
| printk(BIOS_DEBUG, " Detected PCIe x1 device %04x:%04x\n", |
| reg32 & 0xffff, reg32 >> 16); |
| } else { |
| printk(BIOS_DEBUG, " timeout!\n"); |
| printk(BIOS_DEBUG, "Disabling PCIe x16 port completely.\n"); |
| goto disable_pciexpress_x16_link; |
| } |
| } |
| |
| reg16 = pci_read_config16(p2peg, 0xb2); |
| reg16 >>= 4; |
| reg16 &= 0x3f; |
| /* reg16 == 1 -> x1; reg16 == 16 -> x16 */ |
| printk(BIOS_DEBUG, "PCIe x%d link training succeeded.\n", reg16); |
| |
| reg32 = pci_read_config32(p2peg, PEGTC); |
| reg32 &= 0xfffffc00; /* clear [9:0] */ |
| if (reg16 == 1) |
| reg32 |= 0x32b; |
| // TODO |
| /* pci_write_config32(p2peg, PEGTC, reg32); */ |
| else if (reg16 == 16) |
| reg32 |= 0x0f4; |
| // TODO |
| /* pci_write_config32(p2peg, PEGTC, reg32); */ |
| |
| reg32 = (pci_read_config32(peg_plugin, 0x8) >> 8); |
| printk(BIOS_DEBUG, "PCIe device class: %06x\n", reg32); |
| if (reg32 == 0x030000) { |
| printk(BIOS_DEBUG, "PCIe device is VGA. Disabling IGD.\n"); |
| reg16 = (1 << 1); |
| pci_write_config16(PCI_DEV(0, 0x0, 0), GGC, reg16); |
| |
| reg32 = pci_read_config32(PCI_DEV(0, 0x0, 0), DEVEN); |
| reg32 &= ~(DEVEN_D2F0 | DEVEN_D2F1); |
| pci_write_config32(PCI_DEV(0, 0x0, 0), DEVEN, reg32); |
| } |
| |
| /* Enable GPEs */ |
| reg32 = pci_read_config32(p2peg, PEG_LC); |
| reg32 |= (1 << 2) | (1 << 1) | (1 << 0); /* PMEGPE, HPGPE, GENGPE */ |
| pci_write_config32(p2peg, PEG_LC, reg32); |
| |
| /* Virtual Channel Configuration: Only VC0 on PCIe x16 */ |
| reg32 = pci_read_config32(p2peg, VC0RCTL); |
| reg32 &= 0xffffff01; |
| pci_write_config32(p2peg, VC0RCTL, reg32); |
| |
| /* Extended VC count */ |
| reg32 = pci_read_config32(p2peg, PVCCAP1); |
| reg32 &= ~(7 << 0); |
| pci_write_config32(p2peg, PVCCAP1, reg32); |
| |
| /* Active State Power Management ASPM */ |
| |
| /* TODO */ |
| |
| /* Clear error bits */ |
| pci_write_config16(p2peg, PCISTS1, 0xffff); |
| pci_write_config16(p2peg, SSTS1, 0xffff); |
| pci_write_config16(p2peg, DSTS, 0xffff); |
| pci_write_config32(p2peg, UESTS, 0xffffffff); |
| pci_write_config32(p2peg, CESTS, 0xffffffff); |
| pci_write_config32(p2peg, 0x1f0, 0xffffffff); |
| pci_write_config32(p2peg, 0x228, 0xffffffff); |
| |
| /* Program R/WO registers */ |
| reg32 = pci_read_config32(p2peg, 0x308); |
| pci_write_config32(p2peg, 0x308, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0x314); |
| pci_write_config32(p2peg, 0x314, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0x324); |
| pci_write_config32(p2peg, 0x324, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0x328); |
| pci_write_config32(p2peg, 0x328, reg32); |
| |
| /* Additional PCIe graphics setup */ |
| reg32 = pci_read_config32(p2peg, 0xf0); |
| reg32 |= (3 << 26); |
| pci_write_config32(p2peg, 0xf0, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0xf0); |
| reg32 |= (3 << 24); |
| pci_write_config32(p2peg, 0xf0, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0xf0); |
| reg32 |= (1 << 5); |
| pci_write_config32(p2peg, 0xf0, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0x200); |
| reg32 &= ~(3 << 26); |
| reg32 |= (2 << 26); |
| pci_write_config32(p2peg, 0x200, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0xe80); |
| if (i945_silicon_revision() >= 2) |
| reg32 |= (1 << 12); |
| else |
| reg32 &= ~(1 << 12); |
| pci_write_config32(p2peg, 0xe80, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0xeb4); |
| reg32 &= ~(1 << 31); |
| pci_write_config32(p2peg, 0xeb4, reg32); |
| |
| reg32 = pci_read_config32(p2peg, 0xfc); |
| reg32 |= (1 << 31); |
| pci_write_config32(p2peg, 0xfc, reg32); |
| |
| if (i945_silicon_revision() >= 3) { |
| static const u32 reglist[] = { |
| 0xec0, 0xed4, 0xee8, 0xefc, 0xf10, 0xf24, |
| 0xf38, 0xf4c, 0xf60, 0xf74, 0xf88, 0xf9c, |
| 0xfb0, 0xfc4, 0xfd8, 0xfec |
| }; |
| |
| int i; |
| for (i = 0; i < ARRAY_SIZE(reglist); i++) { |
| reg32 = pci_read_config32(p2peg, reglist[i]); |
| reg32 &= 0x0fffffff; |
| reg32 |= (2 << 28); |
| pci_write_config32(p2peg, reglist[i], reg32); |
| } |
| } |
| |
| if (i945_silicon_revision() <= 2) { |
| /* Set voltage specific parameters */ |
| reg32 = pci_read_config32(p2peg, 0xe80); |
| reg32 &= (0xf << 4); /* Default case 1.05V */ |
| if ((MCHBAR32(DFT_STRAP1) & (1 << 20)) == 0) { /* 1.50V */ |
| reg32 |= (7 << 4); |
| } |
| pci_write_config32(p2peg, 0xe80, reg32); |
| } |
| |
| return; |
| |
| disable_pciexpress_x16_link: |
| /* For now we just disable the x16 link */ |
| printk(BIOS_DEBUG, "Disabling PCI Express x16 Link\n"); |
| |
| MCHBAR16(UPMC1) |= (1 << 5) | (1 << 0); |
| |
| /* Toggle PCIRST# */ |
| pci_s_assert_secondary_reset(p2peg); |
| |
| reg32 = pci_read_config32(p2peg, 0x224); |
| reg32 |= (1 << 8); |
| pci_write_config32(p2peg, 0x224, reg32); |
| |
| pci_s_deassert_secondary_reset(p2peg); |
| |
| printk(BIOS_DEBUG, "Wait for link to enter detect state... "); |
| timeout = 0x7fffff; |
| for (reg32 = pci_read_config32(p2peg, PEGSTS); |
| (reg32 & 0x000f0000) && --timeout;) |
| ; |
| if (!timeout) |
| printk(BIOS_DEBUG, "timeout!\n"); |
| else |
| printk(BIOS_DEBUG, "ok\n"); |
| |
| /* Finally: Disable the PCI config header */ |
| reg16 = pci_read_config16(PCI_DEV(0, 0x00, 0), DEVEN); |
| reg16 &= ~DEVEN_D1F0; |
| pci_write_config16(PCI_DEV(0, 0x00, 0), DEVEN, reg16); |
| } |
| |
| static void i945_setup_root_complex_topology(void) |
| { |
| u32 reg32; |
| pci_devfn_t p2peg = PCI_DEV(0, 0x01, 0); |
| |
| printk(BIOS_DEBUG, "Setting up Root Complex Topology\n"); |
| /* Egress Port Root Topology */ |
| |
| reg32 = EPBAR32(EPESD); |
| reg32 &= 0xff00ffff; |
| reg32 |= (1 << 16); |
| EPBAR32(EPESD) = reg32; |
| |
| EPBAR32(EPLE1D) |= (1 << 16) | (1 << 0); |
| |
| EPBAR32(EPLE1A) = (uintptr_t)DEFAULT_DMIBAR; |
| |
| EPBAR32(EPLE2D) |= (1 << 16) | (1 << 0); |
| |
| /* DMI Port Root Topology */ |
| |
| reg32 = DMIBAR32(DMILE1D); |
| reg32 &= 0x00ffffff; |
| |
| reg32 &= 0xff00ffff; |
| reg32 |= (2 << 16); |
| |
| reg32 |= (1 << 0); |
| DMIBAR32(DMILE1D) = reg32; |
| |
| DMIBAR32(DMILE1A) = (uintptr_t)DEFAULT_RCBA; |
| |
| DMIBAR32(DMILE2D) |= (1 << 16) | (1 << 0); |
| |
| DMIBAR32(DMILE2A) = DEFAULT_EPBAR; |
| |
| /* PCI Express x16 Port Root Topology */ |
| if (pci_read_config8(PCI_DEV(0, 0x00, 0), DEVEN) & DEVEN_D1F0) { |
| pci_write_config32(p2peg, LE1A, DEFAULT_EPBAR); |
| reg32 = pci_read_config32(p2peg, LE1D); |
| reg32 |= (1 << 0); |
| pci_write_config32(p2peg, LE1D, reg32); |
| } |
| } |
| |
| static void ich7_setup_root_complex_topology(void) |
| { |
| /* Write the R/WO registers */ |
| |
| RCBA32(ESD) |= (2 << 16); |
| |
| RCBA32(ULD) |= (1 << 24) | (1 << 16); |
| |
| RCBA32(ULBA) = (uintptr_t)DEFAULT_DMIBAR; |
| /* Write ESD.CID to TCID */ |
| RCBA32(RP1D) |= (2 << 16); |
| RCBA32(RP2D) |= (2 << 16); |
| RCBA32(RP3D) |= (2 << 16); |
| RCBA32(RP4D) |= (2 << 16); |
| RCBA32(HDD) |= (2 << 16); |
| RCBA32(RP5D) |= (2 << 16); |
| RCBA32(RP6D) |= (2 << 16); |
| } |
| |
| static void ich7_setup_pci_express(void) |
| { |
| /* Enable PCIe Root Port Clock Gate */ |
| RCBA32(CG) |= (1 << 0); |
| |
| /* Initialize slot power limit for root ports */ |
| pci_write_config32(PCI_DEV(0, 0x1c, 0), 0x54, 0x00000060); |
| #if 0 |
| pci_write_config32(PCI_DEV(0, 0x1c, 4), 0x54, 0x00480ce0); |
| pci_write_config32(PCI_DEV(0, 0x1c, 5), 0x54, 0x00500ce0); |
| #endif |
| |
| pci_write_config32(PCI_DEV(0, 0x1c, 0), 0xd8, 0x00110000); |
| } |
| |
| void i945_early_initialization(void) |
| { |
| /* Print some chipset specific information */ |
| switch (pci_read_config32(PCI_DEV(0, 0x00, 0), 0)) { |
| case 0x27708086: /* 82945G/GZ/GC/P/PL */ |
| i945_detect_chipset(); |
| break; |
| case 0x27a08086: /* 945GME/GSE */ |
| case 0x27ac8086: /* 945GM/PM/GMS/GU/GT, 943/940GML */ |
| i945m_detect_chipset(); |
| break; |
| } |
| |
| /* Setup all BARs required for early PCIe and raminit */ |
| i945_setup_bars(); |
| |
| /* Change port80 to LPC */ |
| RCBA32(GCS) &= (~0x04); |
| |
| /* Just do it that way */ |
| RCBA32(0x2010) |= (1 << 10); |
| } |
| |
| static void i945_prepare_resume(int s3resume) |
| { |
| int cbmem_was_initted; |
| |
| cbmem_was_initted = !cbmem_recovery(s3resume); |
| |
| romstage_handoff_init(cbmem_was_initted && s3resume); |
| } |
| |
| void i945_late_initialization(int s3resume) |
| { |
| i945_setup_egress_port(); |
| |
| ich7_setup_root_complex_topology(); |
| |
| ich7_setup_pci_express(); |
| |
| ich7_setup_dmi_rcrb(); |
| |
| i945_setup_dmi_rcrb(); |
| |
| if (CONFIG(NORTHBRIDGE_INTEL_SUBTYPE_I945GM)) |
| i945_setup_pci_express_x16(); |
| |
| i945_setup_root_complex_topology(); |
| |
| if (CONFIG(DEBUG_RAM_SETUP)) |
| sdram_dump_mchbar_registers(); |
| |
| MCHBAR16(SSKPD) = 0xCAFE; |
| |
| i945_prepare_resume(s3resume); |
| } |