/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void pch_enable_ioapic(struct device *dev) { /* Assign unique bus/dev/fn for I/O APIC */ pci_write_config16(dev, LPC_IBDF, PCH_IOAPIC_PCI_BUS << 8 | PCH_IOAPIC_PCI_SLOT << 3); /* affirm full set of redirection table entries ("write once") */ /* PCH-LP has 40 redirection entries */ ioapic_set_max_vectors(VIO_APIC_VADDR, 40); set_ioapic_id(VIO_APIC_VADDR, 0x02); } static void enable_hpet(struct device *dev) { size_t i; /* Assign unique bus/dev/fn for each HPET */ for (i = 0; i < 8; ++i) pci_write_config16(dev, LPC_HnBDF(i), PCH_HPET_PCI_BUS << 8 | PCH_HPET_PCI_SLOT << 3 | i); } /* PIRQ[n]_ROUT[3:0] - PIRQ Routing Control * 0x00 - 0000 = Reserved * 0x01 - 0001 = Reserved * 0x02 - 0010 = Reserved * 0x03 - 0011 = IRQ3 * 0x04 - 0100 = IRQ4 * 0x05 - 0101 = IRQ5 * 0x06 - 0110 = IRQ6 * 0x07 - 0111 = IRQ7 * 0x08 - 1000 = Reserved * 0x09 - 1001 = IRQ9 * 0x0A - 1010 = IRQ10 * 0x0B - 1011 = IRQ11 * 0x0C - 1100 = IRQ12 * 0x0D - 1101 = Reserved * 0x0E - 1110 = IRQ14 * 0x0F - 1111 = IRQ15 * PIRQ[n]_ROUT[7] - PIRQ Routing Control * 0x80 - The PIRQ is not routed. */ static void pch_pirq_init(struct device *dev) { struct device *irq_dev; const uint8_t pirq = 0x80; pci_write_config8(dev, PIRQA_ROUT, pirq); pci_write_config8(dev, PIRQB_ROUT, pirq); pci_write_config8(dev, PIRQC_ROUT, pirq); pci_write_config8(dev, PIRQD_ROUT, pirq); pci_write_config8(dev, PIRQE_ROUT, pirq); pci_write_config8(dev, PIRQF_ROUT, pirq); pci_write_config8(dev, PIRQG_ROUT, pirq); pci_write_config8(dev, PIRQH_ROUT, pirq); for (irq_dev = all_devices; irq_dev; irq_dev = irq_dev->next) { u8 int_pin = 0, int_line = 0; if (!irq_dev->enabled || irq_dev->path.type != DEVICE_PATH_PCI) continue; int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN); switch (int_pin) { case 1: /* INTA# */ case 2: /* INTB# */ case 3: /* INTC# */ case 4: /* INTD# */ int_line = pirq; break; } if (!int_line) continue; pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, int_line); } } static void pch_power_options(struct device *dev) { u16 reg16; const char *state; /* Which state do we want to goto after g3 (power restored)? * 0 == S0 Full On * 1 == S5 Soft Off * * If the option is not existent (Laptops), use Kconfig setting. */ const unsigned int pwr_on = get_uint_option("power_on_after_fail", CONFIG_MAINBOARD_POWER_FAILURE_STATE); reg16 = pci_read_config16(dev, GEN_PMCON_3); reg16 &= 0xfffe; switch (pwr_on) { case MAINBOARD_POWER_OFF: reg16 |= 1; state = "off"; break; case MAINBOARD_POWER_ON: reg16 &= ~1; state = "on"; break; case MAINBOARD_POWER_KEEP: reg16 &= ~1; state = "state keep"; break; default: state = "undefined"; } reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */ reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */ reg16 &= ~(1 << 10); reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */ reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */ pci_write_config16(dev, GEN_PMCON_3, reg16); printk(BIOS_INFO, "Set power %s after power failure.\n", state); if (dev->chip_info) { const struct soc_intel_broadwell_pch_config *config = dev->chip_info; /* GPE setup based on device tree configuration */ enable_all_gpe(config->gpe0_en_1, config->gpe0_en_2, config->gpe0_en_3, config->gpe0_en_4); /* SMI setup based on device tree configuration */ enable_alt_smi(config->alt_gp_smi_en); } } static void pch_misc_init(struct device *dev) { u8 reg8; u32 reg32; /* Prepare sleep mode */ reg32 = inl(ACPI_BASE_ADDRESS + PM1_CNT); reg32 &= ~SLP_TYP; reg32 |= SCI_EN; outl(reg32, ACPI_BASE_ADDRESS + PM1_CNT); /* Set up NMI on errors */ reg8 = inb(0x61); reg8 &= ~0xf0; /* Higher nibble must be 0 */ reg8 |= (1 << 2); /* PCI SERR# disable for now */ outb(reg8, 0x61); /* Disable NMI sources */ reg8 = inb(0x70); reg8 |= (1 << 7); /* Can't mask NMI from PCI-E and NMI_NOW */ outb(reg8, 0x70); /* Indicate DRAM init done for MRC */ pci_or_config8(dev, GEN_PMCON_2, 1 << 7); /* Enable BIOS updates outside of SMM */ pci_and_config8(dev, BIOS_CNTL, ~(1 << 5)); /* Clear status bits to prevent unexpected wake */ RCBA32_OR(0x3310, 0x2f); RCBA32_AND_OR(0x3f02, ~0xf, 0); /* Enable PCIe Releaxed Order */ RCBA32_OR(0x2314, (1 << 31) | (1 << 7)), RCBA32_OR(0x1114, (1 << 15) | (1 << 14)), /* Setup SERIRQ, enable continuous mode */ reg8 = pci_read_config8(dev, SERIRQ_CNTL); reg8 |= 1 << 7; if (CONFIG(SERIRQ_CONTINUOUS_MODE)) reg8 |= 1 << 6; pci_write_config8(dev, SERIRQ_CNTL, reg8); } /* Magic register settings for power management */ static void pch_pm_init_magic(struct device *dev) { pci_write_config8(dev, 0xa9, 0x46); RCBA32_AND_OR(0x232c, ~1, 0); RCBA32_OR(0x1100, 0x0000c13f); RCBA32_AND_OR(0x2320, ~0x60, 0x10); RCBA32(0x3314) = 0x00012fff; RCBA32_AND_OR(0x3318, ~0x000f0330, 0x0dcf0400); RCBA32(0x3324) = 0x04000000; RCBA32(0x3368) = 0x00041400; RCBA32(0x3388) = 0x3f8ddbff; RCBA32(0x33ac) = 0x00007001; RCBA32(0x33b0) = 0x00181900; RCBA32(0x33c0) = 0x00060A00; RCBA32(0x33d0) = 0x06200840; RCBA32(0x3a28) = 0x01010101; RCBA32(0x3a2c) = 0x040c0404; RCBA32(0x3a9c) = 0x9000000a; RCBA32(0x2b1c) = 0x03808033; RCBA32(0x2b34) = 0x80000009; RCBA32(0x3348) = 0x022ddfff; RCBA32(0x334c) = 0x00000001; RCBA32(0x3358) = 0x0001c000; RCBA32(0x3380) = 0x3f8ddbff; RCBA32(0x3384) = 0x0001c7e1; RCBA32(0x338c) = 0x0001c7e1; RCBA32(0x3398) = 0x0001c000; RCBA32(0x33a8) = 0x00181900; RCBA32(0x33dc) = 0x00080000; RCBA32(0x33e0) = 0x00000001; RCBA32(0x3a20) = 0x0000040c; RCBA32(0x3a24) = 0x01010101; RCBA32(0x3a30) = 0x01010101; pci_update_config32(dev, 0xac, ~0x00200000, 0); RCBA32_OR(0x0410, 0x00000003); RCBA32_OR(0x2618, 0x08000000); RCBA32_OR(0x2300, 0x00000002); RCBA32_OR(0x2600, 0x00000008); RCBA32(0x33b4) = 0x00007001; RCBA32(0x3350) = 0x022ddfff; RCBA32(0x3354) = 0x00000001; /* Power Optimizer */ RCBA32_OR(0x33d4, 0x08000000); RCBA32_OR(0x33c8, 0x00000080); RCBA32(0x2b10) = 0x0000883c; RCBA32(0x2b14) = 0x1e0a4616; RCBA32(0x2b24) = 0x40000005; RCBA32(0x2b20) = 0x0005db01; RCBA32(0x3a80) = 0x05145005; RCBA32(0x3a84) = 0x00001005; RCBA32_OR(0x33d4, 0x2fff2fb1); RCBA32_OR(0x33c8, 0x00008000); } static void pch_enable_mphy(void) { u32 gpio71_native = gpio_is_native(71); u32 data_and = 0xffffffff; u32 data_or = (1 << 14) | (1 << 13) | (1 << 12); if (gpio71_native) { data_or |= (1 << 0); if (pch_is_wpt()) { data_and &= ~((1 << 7) | (1 << 6) | (1 << 3)); data_or |= (1 << 5) | (1 << 4); if (pch_is_wpt_ulx()) { /* Check if SATA and USB3 MPHY are enabled */ u32 strap19 = pch_read_soft_strap(19); strap19 &= ((1 << 31) | (1 << 30)); strap19 >>= 30; if (strap19 == 3) { data_or |= (1 << 3); printk(BIOS_DEBUG, "Enable ULX MPHY PG " "control in single domain\n"); } else if (strap19 == 0) { printk(BIOS_DEBUG, "Enable ULX MPHY PG " "control in split domains\n"); } else { printk(BIOS_DEBUG, "Invalid PCH Soft " "Strap 19 configuration\n"); } } else { data_or |= (1 << 3); } } } pch_iobp_update(0xCF000000, data_and, data_or); } static void pch_init_deep_sx(struct device *dev) { const struct soc_intel_broadwell_pch_config *config = dev->chip_info; if (!config) return; if (config->deep_sx_enable_ac) { RCBA32_OR(DEEP_S3_POL, DEEP_S3_EN_AC); RCBA32_OR(DEEP_S5_POL, DEEP_S5_EN_AC); } if (config->deep_sx_enable_dc) { RCBA32_OR(DEEP_S3_POL, DEEP_S3_EN_DC); RCBA32_OR(DEEP_S5_POL, DEEP_S5_EN_DC); } if (config->deep_sx_enable_ac || config->deep_sx_enable_dc) RCBA32_OR(DEEP_SX_CONFIG, DEEP_SX_WAKE_PIN_EN | DEEP_SX_GP27_PIN_EN); } /* Power Management init */ static void pch_pm_init(struct device *dev) { printk(BIOS_DEBUG, "PCH PM init\n"); pch_init_deep_sx(dev); pch_enable_mphy(); pch_pm_init_magic(dev); if (pch_is_wpt()) { RCBA32_OR(0x33e0, (1 << 4) | (1 << 1)); RCBA32_OR(0x2b1c, (1 << 22) | (1 << 14) | (1 << 13)); RCBA32(0x33e4) = 0x16bf0002; RCBA32_OR(0x33e4, 0x1); } pch_iobp_update(0xCA000000, ~0UL, 0x00000009); /* Set RCBA 0x2b1c[29]=1 if DSP disabled */ if (RCBA32(FD) & PCH_DISABLE_ADSPD) RCBA32_OR(0x2b1c, (1 << 29)); } static void pch_cg_init(struct device *dev) { u32 reg32; u16 reg16; struct device *igd_dev = pcidev_path_on_root(SA_DEVFN_IGD); /* DMI */ RCBA32_OR(0x2234, 0xf); reg16 = pci_read_config16(dev, GEN_PMCON_1); reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */ if (pch_is_wpt()) reg16 &= ~(1 << 11); else reg16 |= (1 << 11); reg16 |= (1 << 5) | (1 << 6) | (1 << 7) | (1 << 12); reg16 |= (1 << 2); // PCI CLKRUN# Enable pci_write_config16(dev, GEN_PMCON_1, reg16); /* * RCBA + 0x2614[27:25,14:13,10,8] = 101,11,1,1 * RCBA + 0x2614[23:16] = 0x20 * RCBA + 0x2614[30:28] = 0x0 * RCBA + 0x2614[26] = 1 (IF 0:2.0@0x08 >= 0x0b) */ RCBA32_AND_OR(0x2614, ~0x64ff0000, 0x0a206500); /* Check for 0:2.0@0x08 >= 0x0b */ if (pch_is_wpt() || pci_read_config8(igd_dev, 0x8) >= 0x0b) RCBA32_OR(0x2614, (1 << 26)); RCBA32_OR(0x900, 0x0000031f); reg32 = RCBA32(CG); if (RCBA32(0x3454) & (1 << 4)) reg32 &= ~(1 << 29); // LPC Dynamic else reg32 |= (1 << 29); // LPC Dynamic reg32 |= (1 << 31); // LP LPC reg32 |= (1 << 30); // LP BLA if (RCBA32(0x3454) & (1 << 4)) reg32 &= ~(1 << 29); else reg32 |= (1 << 29); reg32 |= (1 << 28); // GPIO Dynamic reg32 |= (1 << 27); // HPET Dynamic reg32 |= (1 << 26); // Generic Platform Event Clock if (RCBA32(BUC) & PCH_DISABLE_GBE) reg32 |= (1 << 23); // GbE Static if (RCBA32(FD) & PCH_DISABLE_HD_AUDIO) reg32 |= (1 << 21); // HDA Static reg32 |= (1 << 22); // HDA Dynamic RCBA32(CG) = reg32; /* PCH-LP LPC */ if (pch_is_wpt()) RCBA32_AND_OR(0x3434, ~0x1f, 0x17); else RCBA32_OR(0x3434, 0x7); /* SPI */ RCBA32_OR(0x38c0, 0x3c07); pch_iobp_update(0xCE00C000, ~1UL, 0x00000000); } static void pch_set_acpi_mode(void) { if (!acpi_is_wakeup_s3()) { apm_control(APM_CNT_ACPI_DISABLE); } } static void lpc_init(struct device *dev) { /* Legacy initialization */ isa_dma_init(); sb_rtc_init(); pch_misc_init(dev); /* Interrupt configuration */ pch_enable_ioapic(dev); pch_pirq_init(dev); setup_i8259(); i8259_configure_irq_trigger(9, 1); enable_hpet(dev); /* Initialize power management */ pch_power_options(dev); pch_pm_init(dev); pch_cg_init(dev); pch_set_acpi_mode(); } static void pch_lpc_add_mmio_resources(struct device *dev) { u32 reg; struct resource *res; const u32 default_decode_base = IO_APIC_ADDR; /* * Just report all resources from IO-APIC base to 4GiB. Don't mark * them reserved as that may upset the OS if this range is marked * as reserved in the e820. */ res = new_resource(dev, OIC); res->base = default_decode_base; res->size = 0 - default_decode_base; res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; /* RCBA */ if (default_decode_base > CONFIG_FIXED_RCBA_MMIO_BASE) { res = new_resource(dev, RCBA); res->base = CONFIG_FIXED_RCBA_MMIO_BASE; res->size = CONFIG_RCBA_LENGTH; res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED | IORESOURCE_RESERVE; } /* Check LPC Memory Decode register. */ reg = pci_read_config32(dev, LGMR); if (reg & 1) { reg &= ~0xffff; if (reg < default_decode_base) { res = new_resource(dev, LGMR); res->base = reg; res->size = 16 * 1024; res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED | IORESOURCE_RESERVE; } } } /* Default IO range claimed by the LPC device. The upper bound is exclusive. */ #define LPC_DEFAULT_IO_RANGE_LOWER 0 #define LPC_DEFAULT_IO_RANGE_UPPER 0x1000 static inline int pch_io_range_in_default(int base, int size) { /* Does it start above the range? */ if (base >= LPC_DEFAULT_IO_RANGE_UPPER) return 0; /* Is it entirely contained? */ if (base >= LPC_DEFAULT_IO_RANGE_LOWER && (base + size) < LPC_DEFAULT_IO_RANGE_UPPER) return 1; /* This will return not in range for partial overlaps. */ return 0; } /* * Note: this function assumes there is no overlap with the default LPC device's * claimed range: LPC_DEFAULT_IO_RANGE_LOWER -> LPC_DEFAULT_IO_RANGE_UPPER. */ static void pch_lpc_add_io_resource(struct device *dev, u16 base, u16 size, int index) { struct resource *res; if (pch_io_range_in_default(base, size)) return; res = new_resource(dev, index); res->base = base; res->size = size; res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; } static void pch_lpc_add_gen_io_resources(struct device *dev, int reg_value, int index) { /* * Check if the register is enabled. If so and the base exceeds the * device's default claim range add the resource. */ if (reg_value & 1) { u16 base = reg_value & 0xfffc; u16 size = (0x3 | ((reg_value >> 16) & 0xfc)) + 1; pch_lpc_add_io_resource(dev, base, size, index); } } static void pch_lpc_add_io_resources(struct device *dev) { struct resource *res; /* Add the default claimed IO range for the LPC device. */ res = new_resource(dev, 0); res->base = LPC_DEFAULT_IO_RANGE_LOWER; res->size = LPC_DEFAULT_IO_RANGE_UPPER - LPC_DEFAULT_IO_RANGE_LOWER; res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; /* GPIOBASE */ pch_lpc_add_io_resource(dev, GPIO_BASE_ADDRESS, GPIO_BASE_SIZE, GPIO_BASE); /* PMBASE */ pch_lpc_add_io_resource(dev, ACPI_BASE_ADDRESS, ACPI_BASE_SIZE, PMBASE); /* LPC Generic IO Decode range. */ if (dev->chip_info) { const struct soc_intel_broadwell_pch_config *config = dev->chip_info; pch_lpc_add_gen_io_resources(dev, config->gen1_dec, LPC_GEN1_DEC); pch_lpc_add_gen_io_resources(dev, config->gen2_dec, LPC_GEN2_DEC); pch_lpc_add_gen_io_resources(dev, config->gen3_dec, LPC_GEN3_DEC); pch_lpc_add_gen_io_resources(dev, config->gen4_dec, LPC_GEN4_DEC); } } static void pch_lpc_read_resources(struct device *dev) { /* Get the normal PCI resources of this device. */ pci_dev_read_resources(dev); /* Add non-standard MMIO resources. */ pch_lpc_add_mmio_resources(dev); /* Add IO resources. */ pch_lpc_add_io_resources(dev); } static unsigned long broadwell_write_acpi_tables(const struct device *device, unsigned long current, struct acpi_rsdp *rsdp) { if (CONFIG(SERIALIO_UART_CONSOLE)) { current = acpi_write_dbg2_pci_uart(rsdp, current, (CONFIG_UART_FOR_CONSOLE == 1) ? PCH_DEV_UART1 : PCH_DEV_UART0, ACPI_ACCESS_SIZE_DWORD_ACCESS); } return acpi_write_hpet(device, current, rsdp); } static struct device_operations device_ops = { .read_resources = &pch_lpc_read_resources, .set_resources = &pci_dev_set_resources, .enable_resources = &pci_dev_enable_resources, .write_acpi_tables = broadwell_write_acpi_tables, .init = &lpc_init, .scan_bus = &scan_static_bus, .ops_pci = &pci_dev_ops_pci, }; static const unsigned short pci_device_ids[] = { PCH_LPT_LP_SAMPLE, PCH_LPT_LP_PREMIUM, PCH_LPT_LP_MAINSTREAM, PCH_LPT_LP_VALUE, PCH_WPT_HSW_U_SAMPLE, PCH_WPT_BDW_U_SAMPLE, PCH_WPT_BDW_U_PREMIUM, PCH_WPT_BDW_U_BASE, PCH_WPT_BDW_Y_SAMPLE, PCH_WPT_BDW_Y_PREMIUM, PCH_WPT_BDW_Y_BASE, PCH_WPT_BDW_H, 0 }; static const struct pci_driver pch_lpc __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .devices = pci_device_ids, };