diff options
Diffstat (limited to 'src/soc/intel/skylake/pch.c')
| -rw-r--r-- | src/soc/intel/skylake/pch.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/pch.c b/src/soc/intel/skylake/pch.c new file mode 100644 index 0000000000..ab546e8d55 --- /dev/null +++ b/src/soc/intel/skylake/pch.c @@ -0,0 +1,221 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2014 Google 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 <console/console.h> +#include <delay.h> +#include <arch/io.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_def.h> +#include <soc/iobp.h> +#include <soc/pch.h> +#include <soc/pci_devs.h> +#include <soc/ramstage.h> +#include <soc/rcba.h> +#include <soc/serialio.h> +#include <soc/spi.h> + +u8 pch_revision(void) +{ + return pci_read_config8(PCH_DEV_LPC, PCI_REVISION_ID); +} + +u16 pch_type(void) +{ + return pci_read_config16(PCH_DEV_LPC, PCI_DEVICE_ID); +} + +/* Return 1 if PCH type is WildcatPoint */ +int pch_is_wpt(void) +{ + return ((pch_type() & 0xfff0) == 0x9cc0) ? 1 : 0; +} + +/* Return 1 if PCH type is WildcatPoint ULX */ +int pch_is_wpt_ulx(void) +{ + u16 lpcid = pch_type(); + + switch (lpcid) { + case PCH_WPT_BDW_Y_SAMPLE: + case PCH_WPT_BDW_Y_PREMIUM: + case PCH_WPT_BDW_Y_BASE: + return 1; + } + + return 0; +} + +u32 pch_read_soft_strap(int id) +{ + u32 fdoc; + + fdoc = SPIBAR32(SPIBAR_FDOC); + fdoc &= ~0x00007ffc; + SPIBAR32(SPIBAR_FDOC) = fdoc; + + fdoc |= 0x00004000; + fdoc |= id * 4; + SPIBAR32(SPIBAR_FDOC) = fdoc; + + return SPIBAR32(SPIBAR_FDOD); +} + +#ifndef __PRE_RAM__ + +/* Put device in D3Hot Power State */ +static void pch_enable_d3hot(device_t dev) +{ + u32 reg32 = pci_read_config32(dev, PCH_PCS); + reg32 |= PCH_PCS_PS_D3HOT; + pci_write_config32(dev, PCH_PCS, reg32); +} + +/* RCBA function disable and posting read to flush the transaction */ +static void rcba_function_disable(u32 reg, u32 bit) +{ + RCBA32_OR(reg, bit); + RCBA32(reg); +} + +/* Set bit in Function Disable register to hide this device */ +void pch_disable_devfn(device_t dev) +{ + switch (dev->path.pci.devfn) { + case PCH_DEVFN_ADSP: /* Audio DSP */ + rcba_function_disable(FD, PCH_DISABLE_ADSPD); + break; + case PCH_DEVFN_XHCI: /* XHCI */ + rcba_function_disable(FD, PCH_DISABLE_XHCI); + break; + case PCH_DEVFN_SDMA: /* DMA */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS0, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_I2C0: /* I2C0 */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS1, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_I2C1: /* I2C1 */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS2, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_SPI0: /* SPI0 */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS3, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_SPI1: /* SPI1 */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS4, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_UART0: /* UART0 */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS5, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_UART1: /* UART1 */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS6, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_ME: /* MEI #1 */ + rcba_function_disable(FD2, PCH_DISABLE_MEI1); + break; + case PCH_DEVFN_ME_2: /* MEI #2 */ + rcba_function_disable(FD2, PCH_DISABLE_MEI2); + break; + case PCH_DEVFN_ME_IDER: /* IDE-R */ + rcba_function_disable(FD2, PCH_DISABLE_IDER); + break; + case PCH_DEVFN_ME_KT: /* KT */ + rcba_function_disable(FD2, PCH_DISABLE_KT); + break; + case PCH_DEVFN_SDIO: /* SDIO */ + pch_enable_d3hot(dev); + pch_iobp_update(SIO_IOBP_FUNCDIS7, ~0UL, SIO_IOBP_FUNCDIS_DIS); + break; + case PCH_DEVFN_GBE: /* Gigabit Ethernet */ + rcba_function_disable(BUC, PCH_DISABLE_GBE); + break; + case PCH_DEVFN_HDA: /* HD Audio Controller */ + rcba_function_disable(FD, PCH_DISABLE_HD_AUDIO); + break; + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 0): /* PCI Express Root Port 1 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 1): /* PCI Express Root Port 2 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 2): /* PCI Express Root Port 3 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 3): /* PCI Express Root Port 4 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 4): /* PCI Express Root Port 5 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 5): /* PCI Express Root Port 6 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 6): /* PCI Express Root Port 7 */ + case PCI_DEVFN(PCH_DEV_SLOT_PCIE, 7): /* PCI Express Root Port 8 */ + rcba_function_disable(FD, + PCH_DISABLE_PCIE(PCI_FUNC(dev->path.pci.devfn))); + break; + case PCH_DEVFN_EHCI: /* EHCI #1 */ + rcba_function_disable(FD, PCH_DISABLE_EHCI1); + break; + case PCH_DEVFN_LPC: /* LPC */ + rcba_function_disable(FD, PCH_DISABLE_LPC); + break; + case PCH_DEVFN_SATA: /* SATA #1 */ + rcba_function_disable(FD, PCH_DISABLE_SATA1); + break; + case PCH_DEVFN_SMBUS: /* SMBUS */ + rcba_function_disable(FD, PCH_DISABLE_SMBUS); + break; + case PCH_DEVFN_SATA2: /* SATA #2 */ + rcba_function_disable(FD, PCH_DISABLE_SATA2); + break; + case PCH_DEVFN_THERMAL: /* Thermal Subsystem */ + rcba_function_disable(FD, PCH_DISABLE_THERMAL); + break; + } +} + +void broadwell_pch_enable_dev(device_t dev) +{ + u32 reg32; + + /* These devices need special enable/disable handling */ + switch (PCI_SLOT(dev->path.pci.devfn)) { + case PCH_DEV_SLOT_PCIE: + case PCH_DEV_SLOT_EHCI: + case PCH_DEV_SLOT_HDA: + return; + } + + if (!dev->enabled) { + printk(BIOS_DEBUG, "%s: Disabling device\n", dev_path(dev)); + + /* Ensure memory, io, and bus master are all disabled */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 &= ~(PCI_COMMAND_MASTER | + PCI_COMMAND_MEMORY | PCI_COMMAND_IO); + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Disable this device if possible */ + pch_disable_devfn(dev); + } else { + /* Enable SERR */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 |= PCI_COMMAND_SERR; + pci_write_config32(dev, PCI_COMMAND, reg32); + } +} + +#endif |