| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <arch/io.h> |
| #include <device/pci_ops.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <console/console.h> |
| #include "chip.h" |
| #include "i82801ix.h" |
| |
| typedef struct southbridge_intel_i82801ix_config config_t; |
| |
| static void i82801ix_enable_device(struct device *dev) |
| { |
| u32 reg32; |
| |
| /* Enable SERR */ |
| reg32 = pci_read_config32(dev, PCI_COMMAND); |
| reg32 |= PCI_COMMAND_SERR; |
| pci_write_config32(dev, PCI_COMMAND, reg32); |
| } |
| |
| static void i82801ix_early_settings(const config_t *const info) |
| { |
| /* Program FERR# as processor break event indicator. */ |
| RCBA32(GCS) |= (1 << 6); |
| /* BIOS must program... |
| * NB: other CIRs are handled in i82801ix_dmi_setup(). */ |
| RCBA32(RCBA_CIR8) = (RCBA32(RCBA_CIR8) & ~(0x3 << 0)) | (0x2 << 0); |
| RCBA32(RCBA_FD) |= (1 << 0); |
| RCBA32(RCBA_CIR9) = (RCBA32(RCBA_CIR9) & ~(0x3 << 26)) | (0x2 << 26); |
| RCBA32(RCBA_CIR7) = (RCBA32(RCBA_CIR7) & ~(0xf << 16)) | (0x5 << 16); |
| RCBA32(RCBA_CIR13) = (RCBA32(RCBA_CIR13) & ~(0xf << 16)) | (0x5 << 16); |
| /* RCBA32(RCBA_CIR5) |= (1 << 0); cf. Specification Update */ |
| RCBA32(RCBA_CIR10) |= (3 << 16); |
| } |
| |
| static void i82801ix_pcie_init(const config_t *const info) |
| { |
| struct device *pciePort[6]; |
| int i, slot_number = 1; /* Reserve slot number 0 for nb's PEG. */ |
| u32 reg32; |
| |
| /* PCIe - BIOS must program... */ |
| for (i = 0; i < 6; ++i) { |
| pciePort[i] = pcidev_on_root(0x1c, i); |
| if (!pciePort[i]) { |
| printk(BIOS_EMERG, "PCIe port 00:1c.%x", i); |
| die(" is not listed in devicetree.\n"); |
| } |
| reg32 = pci_read_config32(pciePort[i], 0x300); |
| pci_write_config32(pciePort[i], 0x300, reg32 | (1 << 21)); |
| pci_write_config8(pciePort[i], 0x324, 0x40); |
| } |
| |
| if (LPC_IS_MOBILE(pcidev_on_root(0x1f, 0))) { |
| for (i = 0; i < 6; ++i) { |
| if (pciePort[i]->enabled) { |
| reg32 = pci_read_config32(pciePort[i], 0xe8); |
| reg32 |= 1; |
| pci_write_config32(pciePort[i], 0xe8, reg32); |
| } |
| } |
| } |
| |
| for (i = 5; (i >= 0) && !pciePort[i]->enabled; --i) { |
| /* Only for the top disabled ports. */ |
| reg32 = pci_read_config32(pciePort[i], 0x300); |
| reg32 |= 0x3 << 16; |
| pci_write_config32(pciePort[i], 0x300, reg32); |
| } |
| |
| /* Set slot implemented, slot number and slot power limits. */ |
| for (i = 0; i < 6; ++i) { |
| struct device *const dev = pciePort[i]; |
| u32 xcap = pci_read_config32(dev, D28Fx_XCAP); |
| if (info->pcie_slot_implemented & (1 << i)) |
| xcap |= PCI_EXP_FLAGS_SLOT; |
| else |
| xcap &= ~PCI_EXP_FLAGS_SLOT; |
| pci_write_config32(dev, D28Fx_XCAP, xcap); |
| |
| if (info->pcie_slot_implemented & (1 << i)) { |
| u32 slcap = pci_read_config32(dev, D28Fx_SLCAP); |
| slcap &= ~(0x1fff << 19); |
| slcap |= (slot_number++ << 19); |
| slcap &= ~(0x0003 << 16); |
| slcap |= (info->pcie_power_limits[i].scale << 16); |
| slcap &= ~(0x00ff << 7); |
| slcap |= (info->pcie_power_limits[i].value << 7); |
| pci_write_config32(dev, D28Fx_SLCAP, slcap); |
| } |
| } |
| |
| /* Lock R/WO ASPM support bits. */ |
| for (i = 0; i < 6; ++i) { |
| reg32 = pci_read_config32(pciePort[i], 0x4c); |
| pci_write_config32(pciePort[i], 0x4c, reg32); |
| } |
| } |
| |
| static void i82801ix_ehci_init(void) |
| { |
| struct device *const pciEHCI1 = pcidev_on_root(0x1d, 7); |
| if (!pciEHCI1) |
| die("EHCI controller (00:1d.7) not listed in devicetree.\n"); |
| struct device *const pciEHCI2 = pcidev_on_root(0x1a, 7); |
| if (!pciEHCI2) |
| die("EHCI controller (00:1a.7) not listed in devicetree.\n"); |
| |
| u32 reg32; |
| |
| /* TODO: Maybe we have to save and |
| restore these settings across S3. */ |
| reg32 = pci_read_config32(pciEHCI1, 0xfc); |
| pci_write_config32(pciEHCI1, 0xfc, (reg32 & ~(3 << 2)) | |
| (1 << 29) | (1 << 17) | (2 << 2)); |
| reg32 = pci_read_config32(pciEHCI2, 0xfc); |
| pci_write_config32(pciEHCI2, 0xfc, (reg32 & ~(3 << 2)) | |
| (1 << 29) | (1 << 17) | (2 << 2)); |
| } |
| |
| static int i82801ix_function_disabled(const unsigned int devfn) |
| { |
| struct device *const dev = pcidev_path_on_root(devfn); |
| if (!dev) { |
| printk(BIOS_EMERG, |
| "PCI device 00:%x.%x", |
| PCI_SLOT(devfn), PCI_FUNC(devfn)); |
| die(" is not listed in devicetree.\n"); |
| } |
| return !dev->enabled; |
| } |
| |
| static void i82801ix_hide_functions(void) |
| { |
| int i; |
| u32 reg32; |
| |
| /* FIXME: This works pretty good if the devicetree is consistent. But |
| some functions have to be disabled in right order and/or have |
| other constraints. */ |
| |
| if (i82801ix_function_disabled(PCI_DEVFN(0x19, 0))) |
| RCBA32(RCBA_BUC) |= BUC_LAND; |
| |
| reg32 = RCBA32(RCBA_FD); |
| struct { |
| int devfn; |
| u32 mask; |
| } functions[] = { |
| { PCI_DEVFN(0x1a, 0), FD_U4D }, /* UHCI #4 */ |
| { PCI_DEVFN(0x1a, 1), FD_U5D }, /* UHCI #5 */ |
| { PCI_DEVFN(0x1a, 2), FD_U6D }, /* UHCI #6 */ |
| { PCI_DEVFN(0x1a, 7), FD_EHCI2D }, /* EHCI #2 */ |
| { PCI_DEVFN(0x1b, 0), FD_HDAD }, /* HD Audio */ |
| { PCI_DEVFN(0x1c, 0), FD_PE1D }, /* PCIe #1 */ |
| { PCI_DEVFN(0x1c, 1), FD_PE2D }, /* PCIe #2 */ |
| { PCI_DEVFN(0x1c, 2), FD_PE3D }, /* PCIe #3 */ |
| { PCI_DEVFN(0x1c, 3), FD_PE4D }, /* PCIe #4 */ |
| { PCI_DEVFN(0x1c, 4), FD_PE5D }, /* PCIe #5 */ |
| { PCI_DEVFN(0x1c, 5), FD_PE6D }, /* PCIe #6 */ |
| { PCI_DEVFN(0x1d, 0), FD_U1D }, /* UHCI #1 */ |
| { PCI_DEVFN(0x1d, 1), FD_U2D }, /* UHCI #2 */ |
| { PCI_DEVFN(0x1d, 2), FD_U3D }, /* UHCI #3 */ |
| { PCI_DEVFN(0x1d, 7), FD_EHCI1D }, /* EHCI #1 */ |
| { PCI_DEVFN(0x1f, 0), FD_LBD }, /* LPC */ |
| { PCI_DEVFN(0x1f, 2), FD_SAD1 }, /* SATA #1 */ |
| { PCI_DEVFN(0x1f, 3), FD_SD }, /* SMBus */ |
| { PCI_DEVFN(0x1f, 5), FD_SAD2 }, /* SATA #2 */ |
| { PCI_DEVFN(0x1f, 6), FD_TTD }, /* Thermal Throttle */ |
| }; |
| for (i = 0; i < ARRAY_SIZE(functions); ++i) { |
| if (i82801ix_function_disabled(functions[i].devfn)) |
| reg32 |= functions[i].mask; |
| } |
| RCBA32(RCBA_FD) = reg32; |
| RCBA32(RCBA_FD) |= (1 << 0); /* BIOS must write this... */ |
| RCBA32(RCBA_FDSW) |= (1 << 7); /* Lock function-disable? */ |
| |
| /* Hide PCIe root port PCI functions. RPFN is partially R/WO. */ |
| reg32 = RCBA32(RCBA_RPFN); |
| for (i = 0; i < 6; ++i) { |
| if (i82801ix_function_disabled(PCI_DEVFN(0x1c, i))) |
| reg32 |= (1 << ((i * 4) + 3)); |
| } |
| RCBA32(RCBA_RPFN) = reg32; |
| |
| /* Lock R/WO UHCI controller #6 remapping. */ |
| RCBA32(RCBA_MAP) = RCBA32(RCBA_MAP); |
| } |
| |
| static void i82801ix_init(void *chip_info) |
| { |
| const config_t *const info = (config_t *)chip_info; |
| |
| printk(BIOS_DEBUG, "Initializing i82801ix southbridge...\n"); |
| |
| i82801ix_early_settings(info); |
| |
| /* PCI Express setup. */ |
| i82801ix_pcie_init(info); |
| |
| /* EHCI configuration. */ |
| i82801ix_ehci_init(); |
| |
| /* Now hide internal functions. We can't access them after this. */ |
| i82801ix_hide_functions(); |
| |
| /* Reset watchdog timer. */ |
| #if !CONFIG(HAVE_SMI_HANDLER) |
| outw(0x0008, DEFAULT_TCOBASE + 0x12); /* Set higher timer value. */ |
| #endif |
| outw(0x0000, DEFAULT_TCOBASE + 0x00); /* Update timer. */ |
| } |
| |
| struct chip_operations southbridge_intel_i82801ix_ops = { |
| CHIP_NAME("Intel ICH9/ICH9-M (82801Ix) Series Southbridge") |
| .enable_dev = i82801ix_enable_device, |
| .init = i82801ix_init, |
| }; |