diff options
Diffstat (limited to 'src/soc/intel/broadwell/pch/early_pch.c')
-rw-r--r-- | src/soc/intel/broadwell/pch/early_pch.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/pch/early_pch.c b/src/soc/intel/broadwell/pch/early_pch.c new file mode 100644 index 0000000000..149dda1ca0 --- /dev/null +++ b/src/soc/intel/broadwell/pch/early_pch.c @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <device/device.h> +#include <device/pci_def.h> +#include <device/pci_ops.h> +#include <device/smbus_host.h> +#include <soc/iomap.h> +#include <soc/lpc.h> +#include <soc/pch.h> +#include <soc/pci_devs.h> +#include <soc/pm.h> +#include <soc/rcba.h> +#include <soc/romstage.h> +#include <soc/smbus.h> +#include <soc/intel/broadwell/pch/chip.h> + +static void pch_route_interrupts(void) +{ + /* + * GFX INTA -> PIRQA (MSI) + * D28IP_P1IP PCIE INTA -> PIRQA + * D29IP_E1P EHCI INTA -> PIRQD + * D20IP_XHCI XHCI INTA -> PIRQC (MSI) + * D31IP_SIP SATA INTA -> PIRQF (MSI) + * D31IP_SMIP SMBUS INTB -> PIRQG + * D31IP_TTIP THRT INTC -> PIRQA + * D27IP_ZIP HDA INTA -> PIRQG (MSI) + */ + + /* Device interrupt pin register (board specific) */ + RCBA32(D31IP) = (INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) | + (INTB << D31IP_SMIP) | (INTA << D31IP_SIP); + RCBA32(D29IP) = (INTA << D29IP_E1P); + RCBA32(D28IP) = (INTA << D28IP_P1IP) | (INTC << D28IP_P3IP) | + (INTB << D28IP_P4IP); + RCBA32(D27IP) = (INTA << D27IP_ZIP); + RCBA32(D26IP) = (INTA << D26IP_E2P); + RCBA32(D22IP) = (NOINT << D22IP_MEI1IP); + RCBA32(D20IP) = (INTA << D20IP_XHCI); + + /* Device interrupt route registers */ + RCBA32(D31IR) = DIR_ROUTE(PIRQG, PIRQC, PIRQB, PIRQA); /* LPC */ + RCBA32(D29IR) = DIR_ROUTE(PIRQD, PIRQD, PIRQD, PIRQD); /* EHCI */ + RCBA32(D28IR) = DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD); /* PCIE */ + RCBA32(D27IR) = DIR_ROUTE(PIRQG, PIRQG, PIRQG, PIRQG); /* HDA */ + RCBA32(D23IR) = DIR_ROUTE(PIRQH, PIRQH, PIRQH, PIRQH); /* SDIO */ + RCBA32(D22IR) = DIR_ROUTE(PIRQA, PIRQA, PIRQA, PIRQA); /* ME */ + RCBA32(D21IR) = DIR_ROUTE(PIRQE, PIRQF, PIRQF, PIRQF); /* SIO */ + RCBA32(D20IR) = DIR_ROUTE(PIRQC, PIRQC, PIRQC, PIRQC); /* XHCI */ +} + +static void pch_enable_lpc(void) +{ + /* Lookup device tree in romstage */ + const struct device *const dev = pcidev_on_root(0x1f, 0); + + const struct soc_intel_broadwell_pch_config *config = config_of(dev); + + pci_write_config32(PCH_DEV_LPC, LPC_GEN1_DEC, config->gen1_dec); + pci_write_config32(PCH_DEV_LPC, LPC_GEN2_DEC, config->gen2_dec); + pci_write_config32(PCH_DEV_LPC, LPC_GEN3_DEC, config->gen3_dec); + pci_write_config32(PCH_DEV_LPC, LPC_GEN4_DEC, config->gen4_dec); +} + +void pch_early_init(void) +{ + pch_route_interrupts(); + + pch_enable_lpc(); + + enable_smbus(); + + /* 8.14 Additional PCI Express Programming Steps, step #1 */ + pci_update_config32(_PCH_DEV(PCIE, 0), 0xf4, ~0x60, 0); + pci_update_config32(_PCH_DEV(PCIE, 0), 0xf4, ~0x80, 0x80); + pci_update_config32(_PCH_DEV(PCIE, 0), 0xe2, ~0x30, 0x30); +} |