/* * This file is part of the coreboot project. * * Copyright (C) 2010 Advanced Micro Devices, Inc. * * 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 #include #include #include #include #include #include "rs780.h" /*------------------------------------------------ * Global variable ------------------------------------------------*/ PCIE_CFG AtiPcieCfg = { PCIE_ENABLE_STATIC_DEV_REMAP, /* Config */ 0, /* ResetReleaseDelay */ 0, /* Gfx0Width */ 0, /* Gfx1Width */ 0, /* GfxPayload */ 0, /* GppPayload */ 0, /* PortDetect, filled by GppSbInit */ 0, /* PortHp */ 0, /* DbgConfig */ 0, /* DbgConfig2 */ 0, /* GfxLx */ 0, /* GppLx */ 0, /* NBSBLx */ 0, /* PortSlotInit */ 0, /* Gfx0Pwr */ 0, /* Gfx1Pwr */ 0 /* GppPwr */ }; static void PciePowerOffGppPorts(device_t nb_dev, device_t dev, u32 port); static void ValidatePortEn(device_t nb_dev); static void ValidatePortEn(device_t nb_dev) { } /***************************************************************** * Compliant with CIM_33's PCIEPowerOffGppPorts * Power off unused GPP lines *****************************************************************/ static void PciePowerOffGppPorts(device_t nb_dev, device_t dev, u32 port) { u32 reg; u16 state_save; struct southbridge_amd_rs780_config *cfg = (struct southbridge_amd_rs780_config *)nb_dev->chip_info; u8 state = cfg->port_enable; if (!(AtiPcieCfg.Config & PCIE_DISABLE_HIDE_UNUSED_PORTS)) state &= AtiPcieCfg.PortDetect; state = ~state; state &= (1 << 4) + (1 << 5) + (1 << 6) + (1 << 7); state_save = state << 17; state &= ~(AtiPcieCfg.PortHp); reg = nbmisc_read_index(nb_dev, 0x0c); reg |= state; nbmisc_write_index(nb_dev, 0x0c, reg); reg = nbmisc_read_index(nb_dev, 0x08); reg |= state_save; nbmisc_write_index(nb_dev, 0x08, reg); if ((AtiPcieCfg.Config & PCIE_OFF_UNUSED_GPP_LANES) && !(AtiPcieCfg. Config & (PCIE_DISABLE_HIDE_UNUSED_PORTS + PCIE_GFX_COMPLIANCE))) { } /* step 3 Power Down Control for Southbridge */ if (port != 8) return; reg = nbpcie_p_read_index(dev, 0xa2); switch ((reg >> 4) & 0x7) { /* get bit 4-6, LC_LINK_WIDTH_RD */ case 1: set_pcie_enable_bits(nb_dev, 0x65 | PCIE_CORE_INDEX_GPPSB, 0x0f0f, 0x0e0e); break; case 2: set_pcie_enable_bits(nb_dev, 0x65 | PCIE_CORE_INDEX_GPPSB, 0x0f0f, 0x0c0c); break; default: break; } } /********************************************************************** **********************************************************************/ static void switching_gppsb_configurations(device_t nb_dev, device_t sb_dev) { u32 reg; struct southbridge_amd_rs780_config *cfg = (struct southbridge_amd_rs780_config *)nb_dev->chip_info; /* 5.5.7.1-3 enables GPP reconfiguration */ reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7); reg |= (RECONFIG_GPPSB_EN + RECONFIG_GPPSB_LINK_CONFIG + RECONFIG_GPPSB_ATOMIC_RESET); nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg); /* 5.5.7.4a. De-asserts STRAP_BIF_all_valid for PCIE-GPPSB core */ reg = nbmisc_read_index(nb_dev, 0x66); reg |= 1 << 31; nbmisc_write_index(nb_dev, 0x66, reg); /* 5.5.7.4b. sets desired GPPSB configurations, bit4-7 */ reg = nbmisc_read_index(nb_dev, 0x67); reg &= 0xFFFFff0f; /* clean */ reg |= cfg->gppsb_configuration << 4; nbmisc_write_index(nb_dev, 0x67, reg); #if 1 /* NOTE: * In CIMx 4.5.0 and RPR, 4c is done before 5 & 6. But in this way, * a x4 device in port B (dev 4) of Configuration B can only be detected * as x1, instead of x4. When the port B is being trained, the * LC_CURRENT_STATE is 6 and the LC_LINK_WIDTH_RD is 1. We have * to set the PCIEIND:0x65 as 0xE0E0 and reset the slot. Then the card * seems to work in x1 mode. * In the 2nd way below, we do the 5 & 6 before 4c. it conforms the * CIMx 4.3.0. It conflicts with RPR. But based on the test result I've * made so far, I haven't found any mistake. */ /* 5.5.7.4c. Asserts STRAP_BIF_all_valid for PCIE-GPPSB core */ reg = nbmisc_read_index(nb_dev, 0x66); reg &= ~(1 << 31); nbmisc_write_index(nb_dev, 0x66, reg); /* 5.5.7.5-6. read bit14 and write back its inverted value */ reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7); reg ^= RECONFIG_GPPSB_GPPSB; nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg); #else /* 5.5.7.5-6. read bit14 and write back its inverted value */ reg = nbmisc_read_index(nb_dev, PCIE_NBCFG_REG7); reg ^= RECONFIG_GPPSB_GPPSB; nbmisc_write_index(nb_dev, PCIE_NBCFG_REG7, reg); /* 5.5.7.4c. Asserts STRAP_BIF_all_valid for PCIE-GPPSB core */ reg = nbmisc_read_index(nb_dev, 0x66); reg &= ~(1 << 31); nbmisc_write_index(nb_dev, 0x66, reg); #endif /* 5.5.7.7. delay 1ms */ mdelay(1); /* 5.5.7.8. waits until SB has trained to L0, poll for bit0-5 = 0x10 */ do { reg = nbpcie_p_read_index(sb_dev, PCIE_LC_STATE0); reg &= 0x3f; /* remain LSB [5:0] bits */ } while (LC_STATE_RECONFIG_GPPSB != reg); /* 5.5.7.9.ensures that virtual channel negotiation is completed. poll for bit1 = 0 */ do { reg = pci_ext_read_config32(nb_dev, sb_dev, PCIE_VC0_RESOURCE_STATUS); } while (reg & VC_NEGOTIATION_PENDING); } static void switching_gpp_configurations(device_t nb_dev, device_t sb_dev) { u32 reg; struct southbridge_amd_rs780_config *cfg = (struct southbridge_amd_rs780_config *)nb_dev->chip_info; /* 5.6.2.1. De-asserts STRAP_BIF_all_valid for PCIE-GPP core */ reg = nbmisc_read_index(nb_dev, 0x22); reg |= 1 << 14; nbmisc_write_index(nb_dev, 0x22, reg); /* 5.6.2.2. sets desired GPP configurations, bit7-10 */ reg = nbmisc_read_index(nb_dev, 0x2D); reg &= ~(0xF << 7); /* clean */ reg |= cfg->gpp_configuration << 7; nbmisc_write_index(nb_dev, 0x2D, reg); /* 5.6.2.3. Asserts STRAP_BIF_all_valid for PCIE-GPP core */ reg = nbmisc_read_index(nb_dev, 0x22); reg &= ~(1 << 14); nbmisc_write_index(nb_dev, 0x22, reg); } /***************************************************************** * The rs780 uses NBCONFIG:0x1c (BAR3) to map the PCIE Extended Configuration * Space to a 256MB range within the first 4GB of addressable memory. *****************************************************************/ void enable_pcie_bar3(device_t nb_dev) { printk(BIOS_DEBUG, "enable_pcie_bar3()\n"); set_nbcfg_enable_bits(nb_dev, 0x7C, 1 << 30, 1 << 30); /* Enables writes to the BAR3 register. */ set_nbcfg_enable_bits(nb_dev, 0x84, 7 << 16, 0 << 16); pci_write_config32(nb_dev, 0x1C, EXT_CONF_BASE_ADDRESS); /* PCIEMiscInit */ pci_write_config32(nb_dev, 0x20, 0x00000000); set_htiu_enable_bits(nb_dev, 0x32, 1 << 28, 1 << 28); /* PCIEMiscInit */ ProgK8TempMmioBase(1, EXT_CONF_BASE_ADDRESS, TEMP_MMIO_BASE_ADDRESS); } /***************************************************************** * We should disable bar3 when we want to exit rs780_enable, because bar3 will be * remapped in set_resource later. *****************************************************************/ void disable_pcie_bar3(device_t nb_dev) { printk(BIOS_DEBUG, "disable_pcie_bar3()\n"); pci_write_config32(nb_dev, 0x1C, 0); /* clear BAR3 address */ set_nbcfg_enable_bits(nb_dev, 0x7C, 1 << 30, 0 << 30); /* Disable writes to the BAR3. */ set_htiu_enable_bits(nb_dev, 0x32, 1 << 28, 0); /* disable bar3 decode */ ProgK8TempMmioBase(0, EXT_CONF_BASE_ADDRESS, TEMP_MMIO_BASE_ADDRESS); } /***************************************** * Compliant with CIM_33's PCIEGPPInit * nb_dev: * root bridge struct * dev: * p2p bridge struct * port: * p2p bridge number, 4-10 *****************************************/ void rs780_gpp_sb_init(device_t nb_dev, device_t dev, u32 port) { u32 gfx_gpp_sb_sel; struct southbridge_amd_rs780_config *cfg = (struct southbridge_amd_rs780_config *)nb_dev->chip_info; printk(BIOS_DEBUG, "gpp_sb_init nb_dev=0x%x, dev=0x%x, port=0x%x\n", nb_dev->path.pci.devfn, dev->path.pci.devfn, port); gfx_gpp_sb_sel = port >= 4 && port <= 8 ? PCIE_CORE_INDEX_GPPSB : /* 4,5,6,7,8 */ PCIE_CORE_INDEX_GPP; /* 9,10 */ /* init GPP core */ /* 5.10.8.3. Disable slave ordering logic */ set_pcie_enable_bits(nb_dev, 0x20 | gfx_gpp_sb_sel, 1 << 8, 1 << 8); /* 5.10.8.7. PCIE initialization 5.10.2: rpr 2.12*/ set_pcie_enable_bits(nb_dev, 0x02 | gfx_gpp_sb_sel, 1 << 0, 1 << 0); /* no description in datasheet. */ /* init GPPSB port. rpr 5.10.8 */ /* 5.10.8.1-5.10.8.2. Sets RCB timeout to be 100ms/4=25ms by setting bits[18:16] to 3 h4 * and shortens the enumeration timer by setting bit[19] to 1 */ set_pcie_enable_bits(dev, 0x70, 0xF << 16, 0x4 << 16 | 1 << 19); /* 5.10.8.4. Sets DMA payload size to 64 bytes. */ set_pcie_enable_bits(nb_dev, 0x10 | gfx_gpp_sb_sel, 7 << 10, 4 << 10); /* 5.10.8.6. Disable RC ordering logic */ set_pcie_enable_bits(nb_dev, 0x20 | gfx_gpp_sb_sel, 1 << 9, 1 << 9); /* 5.10.8.7. Ignores DLLs druing L1 */ set_pcie_enable_bits(nb_dev, 0x02 | gfx_gpp_sb_sel, 1 << 0, 1 << 0); /* 5.10.8.8. Prevents LCto go from L0 to Rcv_L0s if L1 is armed. */ set_pcie_enable_bits(dev, 0xA1, 1 << 11, 1 << 11); /* 5.10.8.9. Sets timer in Config state from 20us to 1us. * 5.10.8.10. De-asserts RX_EN in L0s * 5.10.8.11. Enables de-assertion of PG2RX_CR_EN to lock clock recovery parameter when .. */ set_pcie_enable_bits(dev, 0xB1, 1 << 23 | 1 << 19 | 1 << 28, 1 <<23 | 1 << 19 | 1 << 28); /* 5.10.8.12. Turns off offset calibration */ /* 5.10.8.13. Enables Rx Clock gating in CDR */ if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB) set_nbmisc_enable_bits(nb_dev, 0x67, 1 << 14 | 1 << 26, 1 << 14 | 1 << 26); /* 4,5,6,7 */ else set_nbmisc_enable_bits(nb_dev, 0x24, 1 << 29 | 1 << 28, 1 << 29 | 1 << 28); /* 9,10 */ /* 5.10.8.14. Sets number of TX Clocks to drain TX Pipe to 3 */ set_pcie_enable_bits(dev, 0xA0, 0xF << 4, 0x3 << 4); /* 5.10.8.15. empty */ /* 5.10.8.16. P_ELEC_IDLE_MODE */ set_pcie_enable_bits(nb_dev, 0x40 | gfx_gpp_sb_sel, 0x3 << 14, 0x2 << 14); /* 5.10.8.17. LC_BLOCK_EL_IDLE_IN_L0 */ set_pcie_enable_bits(dev, 0xB1, 1 << 20, 1 << 20); /* 5.10.8.18. LC_DONT_GO_TO_L0S_IFL1_ARMED */ set_pcie_enable_bits(dev, 0xA1, 1 << 11, 1 << 11); /* 5.10.8.19. RXP_REALIGN_ON_EACH_TSX_OR_SKP */ set_pcie_enable_bits(nb_dev, 0x40 | gfx_gpp_sb_sel, 1 << 28, 0 << 28); /* 5.10.8.20. Bypass lane de-skew logic if in x1 */ set_pcie_enable_bits(nb_dev, 0xC2 | gfx_gpp_sb_sel, 1 << 14, 1 << 14); /* 5.10.8.21. sets electrical idle threshold. */ if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB) set_nbmisc_enable_bits(nb_dev, 0x6A, 3 << 22, 2 << 22); else set_nbmisc_enable_bits(nb_dev, 0x24, 3 << 16, 2 << 16); /* 5.10.8.22. Disable GEN2 */ /* TODO: should be 2 separated cases. */ set_nbmisc_enable_bits(nb_dev, 0x39, 1 << 31, 0 << 31); set_nbmisc_enable_bits(nb_dev, 0x22, 1 << 5, 0 << 5); set_nbmisc_enable_bits(nb_dev, 0x34, 1 << 31, 0 << 31); set_nbmisc_enable_bits(nb_dev, 0x37, 7 << 5, 0 << 5); /* 5.10.8.23. Disables GEN2 capability of the device. RPR says enable? No! */ set_pcie_enable_bits(dev, 0xA4, 1 << 0, 0 << 0); /* 5.10.8.24. Disable advertising upconfigure support. */ set_pcie_enable_bits(dev, 0xA2, 1 << 13, 1 << 13); /* 5.10.8.25-26. STRAP_BIF_DSN_EN */ if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB) set_nbmisc_enable_bits(nb_dev, 0x68, 1 << 19, 0 << 19); else set_nbmisc_enable_bits(nb_dev, 0x22, 1 << 3, 0 << 3); /* 5.10.8.27-28. */ set_pcie_enable_bits(nb_dev, 0xC1 | gfx_gpp_sb_sel, 1 << 0 | 1 << 2, 1 << 0 | 0 << 2); /* 5.10.8.29. Uses the bif_core de-emphasis strength by default. */ if (gfx_gpp_sb_sel == PCIE_CORE_INDEX_GPPSB) { set_nbmisc_enable_bits(nb_dev, 0x67, 1 << 10, 1 << 10); set_nbmisc_enable_bits(nb_dev, 0x36, 1 << 29, 1 << 29); } else { set_nbmisc_enable_bits(nb_dev, 0x39, 1 << 30, 1 << 30); } /* 5.10.8.30. Set TX arbitration algorithm to round robin. */ set_pcie_enable_bits(nb_dev, 0x1C | gfx_gpp_sb_sel, 1 << 0 | 0x1F << 1 | 0x1F << 6, 1 << 0 | 0x04 << 1 | 0x04 << 6); /* check compliance rpr step 2.1*/ if (AtiPcieCfg.Config & PCIE_GPP_COMPLIANCE) { u32 tmp; tmp = nbmisc_read_index(nb_dev, 0x67); tmp |= 1 << 3; nbmisc_write_index(nb_dev, 0x67, tmp); } /* step 5: dynamic slave CPL buffer allocation. Disable it, otherwise linux hangs. Why? */ /* set_pcie_enable_bits(nb_dev, 0x20 | gfx_gpp_sb_sel, 1 << 11, 1 << 11); */ /* step 5a: Training for GPP devices */ /* init GPP */ switch (port) { case 4: /* GPP */ case 5: case 6: case 7: case 9: case 10: /* 5.10.8.5. Blocks DMA traffic during C3 state */ set_pcie_enable_bits(dev, 0x10, 1 << 0, 0 << 0); /* Enables TLP flushing */ set_pcie_enable_bits(dev, 0x20, 1 << 19, 0 << 19); /* check port enable */ if (cfg->port_enable & (1 << port)) { PcieReleasePortTraining(nb_dev, dev, port); if (!(AtiPcieCfg.Config & PCIE_GPP_COMPLIANCE)) { u8 res = PcieTrainPort(nb_dev, dev, port); printk(BIOS_DEBUG, "PcieTrainPort port=0x%x result=%d\n", port, res); if (res) { AtiPcieCfg.PortDetect |= 1 << port; } } } break; case 8: /* SB */ break; } PciePowerOffGppPorts(nb_dev, dev, port); } /***************************************** * Compliant with CIM_33's PCIEConfigureGPPCore *****************************************/ void config_gpp_core(device_t nb_dev, device_t sb_dev) { u32 reg; struct southbridge_amd_rs780_config *cfg = (struct southbridge_amd_rs780_config *)nb_dev->chip_info; reg = nbmisc_read_index(nb_dev, 0x20); if (AtiPcieCfg.Config & PCIE_ENABLE_STATIC_DEV_REMAP) reg &= 0xfffffffd; /* set bit1 = 0 */ else reg |= 0x2; /* set bit1 = 1 */ nbmisc_write_index(nb_dev, 0x20, reg); reg = nbmisc_read_index(nb_dev, 0x67); /* get STRAP_BIF_LINK_CONFIG_GPPSB at bit 4-7 */ if (cfg->gppsb_configuration != ((reg >> 4) & 0xf)) switching_gppsb_configurations(nb_dev, sb_dev); reg = nbmisc_read_index(nb_dev, 0x2D); /* get STRAP_BIF_LINK_CONFIG_GPP at bit 7-10 */ if (cfg->gpp_configuration != ((reg >> 7) & 0xf)) switching_gpp_configurations(nb_dev, sb_dev); ValidatePortEn(nb_dev); } /** * Hide unused Gpp port */ void pcie_hide_unused_ports(device_t nb_dev) { u16 hide = 0x6FC; /* skip port 0, 1, 8 */ hide &= ~(AtiPcieCfg.PortDetect | AtiPcieCfg.PortHp); printk(BIOS_INFO, "rs780 unused GPP ports bitmap=0x%03x, force disabled\n", hide); set_nbmisc_enable_bits(nb_dev, 0x0C, 0xFC, (hide & 0xFC)); /* bridge 2-7 */ set_nbmisc_enable_bits(nb_dev, 0x0C, 0x30000, ((hide >> 9) & 0x3) << 16); /* bridge 9-a */ }