/* 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 "chip.h" #include static inline void add_mmio_resource(struct device *dev, int i, unsigned long addr, unsigned long size) { mmio_resource_kb(dev, i, addr >> 10, size >> 10); } static void sc_add_mmio_resources(struct device *dev) { add_mmio_resource(dev, 0xfeb, ABORT_BASE_ADDRESS, ABORT_BASE_SIZE); add_mmio_resource(dev, PBASE, PMC_BASE_ADDRESS, PMC_BASE_SIZE); add_mmio_resource(dev, IOBASE, IO_BASE_ADDRESS, IO_BASE_SIZE); add_mmio_resource(dev, IBASE, ILB_BASE_ADDRESS, ILB_BASE_SIZE); add_mmio_resource(dev, SBASE, SPI_BASE_ADDRESS, SPI_BASE_SIZE); add_mmio_resource(dev, MPBASE, MPHY_BASE_ADDRESS, MPHY_BASE_SIZE); add_mmio_resource(dev, PUBASE, PUNIT_BASE_ADDRESS, PUNIT_BASE_SIZE); add_mmio_resource(dev, RCBA, RCBA_BASE_ADDRESS, RCBA_BASE_SIZE); } /* 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 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 sc_add_io_resource(struct device *dev, int base, int size, int index) { struct resource *res; if (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 sc_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; /* GPIO */ sc_add_io_resource(dev, GPIO_BASE_ADDRESS, GPIO_BASE_SIZE, GBASE); /* ACPI */ sc_add_io_resource(dev, ACPI_BASE_ADDRESS, ACPI_BASE_SIZE, ABASE); } static void sc_read_resources(struct device *dev) { /* Get the normal PCI resources of this device. */ pci_dev_read_resources(dev); /* Add non-standard MMIO resources. */ sc_add_mmio_resources(dev); /* Add IO resources. */ sc_add_io_resources(dev); } /* * The UART hardware loses power while in suspend. Because of this the kernel * can hang because it doesn't re-initialize serial ports it is using for * consoles at resume time. The following function configures the UART * if the hardware is enabled though it may not be the correct baud rate * or configuration. This is definitely a hack, but it helps the kernel * along. */ static void com1_configure_resume(struct device *dev) { const uint16_t port = 0x3f8; /* Is the UART I/O port enabled? */ if (!(pci_read_config32(dev, UART_CONT) & 1)) return; /* Disable interrupts */ outb(0x0, port + UART8250_IER); /* Enable FIFOs */ outb(UART8250_FCR_FIFO_EN, port + UART8250_FCR); /* assert DTR and RTS so the other end is happy */ outb(UART8250_MCR_DTR | UART8250_MCR_RTS, port + UART8250_MCR); /* DLAB on */ outb(UART8250_LCR_DLAB | 3, port + UART8250_LCR); /* Set Baud Rate Divisor. 1 ==> 115200 Baud */ outb(1, port + UART8250_DLL); outb(0, port + UART8250_DLM); /* Set to 3 for 8N1 */ outb(3, port + UART8250_LCR); } static void sc_init(struct device *dev) { int i; u8 *pr_base = (u8 *)(ILB_BASE_ADDRESS + 0x08); u16 *ir_base = (u16 *)(ILB_BASE_ADDRESS + 0x20); u32 *gen_pmcon1 = (u32 *)(PMC_BASE_ADDRESS + GEN_PMCON1); u32 *actl = (u32 *)(ILB_BASE_ADDRESS + ACTL); const struct baytrail_irq_route *ir = &global_baytrail_irq_route; struct soc_intel_baytrail_config *config = config_of(dev); /* Set up the PIRQ PIC routing based on static config. */ for (i = 0; i < NUM_PIRQS; i++) { write8(pr_base + i, ir->pic[i]); } /* Set up the per device PIRQ routing base on static config. */ for (i = 0; i < NUM_IR_DEVS; i++) { write16(ir_base + i, ir->pcidev[i]); } /* Route SCI to IRQ9 */ write32(actl, (read32(actl) & ~SCIS_MASK) | SCIS_IRQ9); cmos_init(rtc_failure()); if (config->disable_slp_x_stretch_sus_fail) { printk(BIOS_DEBUG, "Disabling slp_x stretching.\n"); write32(gen_pmcon1, read32(gen_pmcon1) | DIS_SLP_X_STRCH_SUS_UP); } else { write32(gen_pmcon1, read32(gen_pmcon1) & ~DIS_SLP_X_STRCH_SUS_UP); } if (acpi_is_wakeup_s3()) com1_configure_resume(dev); } /* * Common code for the south cluster devices. */ /* Set bit in function disable register to hide this device. */ static void sc_disable_devfn(struct device *dev) { void *func_dis = (void *)(PMC_BASE_ADDRESS + FUNC_DIS); void *func_dis2 = (void *)(PMC_BASE_ADDRESS + FUNC_DIS2); uint32_t mask = 0; uint32_t mask2 = 0; switch (dev->path.pci.devfn) { case PCI_DEVFN(MMC_DEV, MMC_FUNC): mask |= MMC_DIS; break; case PCI_DEVFN(SDIO_DEV, SDIO_FUNC): mask |= SDIO_DIS; break; case PCI_DEVFN(SD_DEV, SD_FUNC): mask |= SD_DIS; break; case PCI_DEVFN(SATA_DEV, SATA_FUNC): mask |= SATA_DIS; break; case PCI_DEVFN(XHCI_DEV, XHCI_FUNC): mask |= XHCI_DIS; /* Disable super speed PHY when XHCI is not available. */ mask2 |= USH_SS_PHY_DIS; break; case PCI_DEVFN(LPE_DEV, LPE_FUNC): mask |= LPE_DIS; break; case PCI_DEVFN(MMC45_DEV, MMC45_FUNC): mask |= MMC45_DIS; break; case PCI_DEVFN(SIO_DMA1_DEV, SIO_DMA1_FUNC): mask |= SIO_DMA1_DIS; break; case PCI_DEVFN(I2C1_DEV, I2C1_FUNC): mask |= I2C1_DIS; break; case PCI_DEVFN(I2C2_DEV, I2C2_FUNC): mask |= I2C1_DIS; break; case PCI_DEVFN(I2C3_DEV, I2C3_FUNC): mask |= I2C3_DIS; break; case PCI_DEVFN(I2C4_DEV, I2C4_FUNC): mask |= I2C4_DIS; break; case PCI_DEVFN(I2C5_DEV, I2C5_FUNC): mask |= I2C5_DIS; break; case PCI_DEVFN(I2C6_DEV, I2C6_FUNC): mask |= I2C6_DIS; break; case PCI_DEVFN(I2C7_DEV, I2C7_FUNC): mask |= I2C7_DIS; break; case PCI_DEVFN(TXE_DEV, TXE_FUNC): mask |= TXE_DIS; break; case PCI_DEVFN(HDA_DEV, HDA_FUNC): mask |= HDA_DIS; break; case PCI_DEVFN(PCIE_PORT1_DEV, PCIE_PORT1_FUNC): mask |= PCIE_PORT1_DIS; break; case PCI_DEVFN(PCIE_PORT2_DEV, PCIE_PORT2_FUNC): mask |= PCIE_PORT2_DIS; break; case PCI_DEVFN(PCIE_PORT3_DEV, PCIE_PORT3_FUNC): mask |= PCIE_PORT3_DIS; break; case PCI_DEVFN(PCIE_PORT4_DEV, PCIE_PORT4_FUNC): mask |= PCIE_PORT4_DIS; break; case PCI_DEVFN(EHCI_DEV, EHCI_FUNC): mask |= EHCI_DIS; break; case PCI_DEVFN(SIO_DMA2_DEV, SIO_DMA2_FUNC): mask |= SIO_DMA2_DIS; break; case PCI_DEVFN(PWM1_DEV, PWM1_FUNC): mask |= PWM1_DIS; break; case PCI_DEVFN(PWM2_DEV, PWM2_FUNC): mask |= PWM2_DIS; break; case PCI_DEVFN(HSUART1_DEV, HSUART1_FUNC): mask |= HSUART1_DIS; break; case PCI_DEVFN(HSUART2_DEV, HSUART2_FUNC): mask |= HSUART2_DIS; break; case PCI_DEVFN(SPI_DEV, SPI_FUNC): mask |= SPI_DIS; break; case PCI_DEVFN(SMBUS_DEV, SMBUS_FUNC): mask2 |= SMBUS_DIS; break; } if (mask != 0) { write32(func_dis, read32(func_dis) | mask); /* Ensure posted write hits */ read32(func_dis); } if (mask2 != 0) { write32(func_dis2, read32(func_dis2) | mask2); /* Ensure posted write hits */ read32(func_dis2); } } static inline void set_d3hot_bits(struct device *dev, int offset) { uint32_t reg8; printk(BIOS_DEBUG, "Power management CAP offset 0x%x.\n", offset); reg8 = pci_read_config8(dev, offset + 4); reg8 |= 0x3; pci_write_config8(dev, offset + 4, reg8); } /* * Parts of the audio subsystem are powered by the HDA device. Thus, one cannot put HDA into * D3Hot. Instead, perform this workaround to make some of the audio paths work for LPE audio. */ static void hda_work_around(struct device *dev) { void *gctl = (void *)(TEMP_BASE_ADDRESS + 0x8); /* Need to set magic register 0x43 to 0xd7 in config space. */ pci_write_config8(dev, 0x43, 0xd7); /* * Need to set bit 0 of GCTL to take the device out of reset. * However, that requires setting up the 64-bit BAR. */ pci_write_config32(dev, PCI_BASE_ADDRESS_0, TEMP_BASE_ADDRESS); pci_write_config32(dev, PCI_BASE_ADDRESS_1, 0); pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_MEMORY); write32(gctl, read32(gctl) | 0x1); pci_write_config16(dev, PCI_COMMAND, 0); pci_write_config32(dev, PCI_BASE_ADDRESS_0, 0); } static int place_device_in_d3hot(struct device *dev) { unsigned int offset; /* * Parts of the HDA block are used for LPE audio as well. * Therefore assume the HDA will never be put into D3Hot. */ if (dev->path.pci.devfn == PCI_DEVFN(HDA_DEV, HDA_FUNC)) { hda_work_around(dev); return 0; } offset = pci_find_capability(dev, PCI_CAP_ID_PM); if (offset != 0) { set_d3hot_bits(dev, offset); return 0; } /* * For some reason some of the devices don't have the capability pointer set correctly. * Work around this by hard coding the offset. */ switch (dev->path.pci.devfn) { case PCI_DEVFN(MMC_DEV, MMC_FUNC): offset = 0x80; break; case PCI_DEVFN(SDIO_DEV, SDIO_FUNC): offset = 0x80; break; case PCI_DEVFN(SD_DEV, SD_FUNC): offset = 0x80; break; case PCI_DEVFN(MMC45_DEV, MMC45_FUNC): offset = 0x80; break; case PCI_DEVFN(LPE_DEV, LPE_FUNC): offset = 0x80; break; case PCI_DEVFN(SIO_DMA1_DEV, SIO_DMA1_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C1_DEV, I2C1_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C2_DEV, I2C2_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C3_DEV, I2C3_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C4_DEV, I2C4_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C5_DEV, I2C5_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C6_DEV, I2C6_FUNC): offset = 0x80; break; case PCI_DEVFN(I2C7_DEV, I2C7_FUNC): offset = 0x80; break; case PCI_DEVFN(SIO_DMA2_DEV, SIO_DMA2_FUNC): offset = 0x80; break; case PCI_DEVFN(PWM1_DEV, PWM1_FUNC): offset = 0x80; break; case PCI_DEVFN(PWM2_DEV, PWM2_FUNC): offset = 0x80; break; case PCI_DEVFN(HSUART1_DEV, HSUART1_FUNC): offset = 0x80; break; case PCI_DEVFN(HSUART2_DEV, HSUART2_FUNC): offset = 0x80; break; case PCI_DEVFN(SPI_DEV, SPI_FUNC): offset = 0x80; break; case PCI_DEVFN(SATA_DEV, SATA_FUNC): offset = 0x70; break; case PCI_DEVFN(XHCI_DEV, XHCI_FUNC): offset = 0x70; break; case PCI_DEVFN(EHCI_DEV, EHCI_FUNC): offset = 0x70; break; case PCI_DEVFN(HDA_DEV, HDA_FUNC): offset = 0x50; break; case PCI_DEVFN(SMBUS_DEV, SMBUS_FUNC): offset = 0x50; break; case PCI_DEVFN(TXE_DEV, TXE_FUNC): /* TXE cannot be placed in D3Hot. */ return 0; case PCI_DEVFN(PCIE_PORT1_DEV, PCIE_PORT1_FUNC): offset = 0xa0; break; case PCI_DEVFN(PCIE_PORT2_DEV, PCIE_PORT2_FUNC): offset = 0xa0; break; case PCI_DEVFN(PCIE_PORT3_DEV, PCIE_PORT3_FUNC): offset = 0xa0; break; case PCI_DEVFN(PCIE_PORT4_DEV, PCIE_PORT4_FUNC): offset = 0xa0; break; } if (offset != 0) { set_d3hot_bits(dev, offset); return 0; } return -1; } /* Common PCI device function disable. */ void southcluster_enable_dev(struct device *dev) { uint16_t reg16; if (!dev->enabled) { int slot = PCI_SLOT(dev->path.pci.devfn); int func = PCI_FUNC(dev->path.pci.devfn); printk(BIOS_DEBUG, "%s: Disabling device: %02x.%01x\n", dev_path(dev), slot, func); /* Ensure memory, io, and bus master are all disabled */ reg16 = pci_read_config16(dev, PCI_COMMAND); reg16 &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO); pci_write_config16(dev, PCI_COMMAND, reg16); /* Place device in D3Hot */ if (place_device_in_d3hot(dev) < 0) { printk(BIOS_WARNING, "Could not place %02x.%01x into D3Hot. " "Keeping device visible.\n", slot, func); return; } /* Disable this device if possible */ sc_disable_devfn(dev); } else { /* Enable SERR */ pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_SERR); } } static struct device_operations device_ops = { .read_resources = sc_read_resources, .set_resources = pci_dev_set_resources, .write_acpi_tables = acpi_write_hpet, .init = sc_init, .enable = southcluster_enable_dev, .scan_bus = scan_static_bus, .ops_pci = &soc_pci_ops, }; static const struct pci_driver southcluster __pci_driver = { .ops = &device_ops, .vendor = PCI_VID_INTEL, .device = LPC_DEVID, }; int __weak mainboard_get_spi_config(struct spi_config *cfg) { return -1; } static void finalize_chipset(void *unused) { void *bcr = (void *)(SPI_BASE_ADDRESS + BCR); void *gcs = (void *)(RCBA_BASE_ADDRESS + GCS); void *gen_pmcon2 = (void *)(PMC_BASE_ADDRESS + GEN_PMCON2); void *etr = (void *)(PMC_BASE_ADDRESS + ETR); uint8_t *spi = (uint8_t *)SPI_BASE_ADDRESS; struct spi_config cfg; /* Set the lock enable on the BIOS control register */ write32(bcr, read32(bcr) | BCR_LE); /* Set BIOS lock down bit controlling boot block size and swapping */ write32(gcs, read32(gcs) | BILD); /* Lock sleep stretching policy and set SMI lock */ write32(gen_pmcon2, read32(gen_pmcon2) | SLPSX_STR_POL_LOCK | SMI_LOCK); /* Set the CF9 lock */ write32(etr, read32(etr) | CF9LOCK); if (mainboard_get_spi_config(&cfg) < 0) { printk(BIOS_DEBUG, "No SPI lockdown configuration.\n"); } else { write16(spi + PREOP, cfg.preop); write16(spi + OPTYPE, cfg.optype); write32(spi + OPMENU0, cfg.opmenu[0]); write32(spi + OPMENU1, cfg.opmenu[1]); write16(spi + HSFSTS, read16(spi + HSFSTS) | FLOCKDN); write32(spi + UVSCC, cfg.uvscc); write32(spi + LVSCC, cfg.lvscc | VCL); } } BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, finalize_chipset, NULL); BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, finalize_chipset, NULL);