| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/mmio.h> |
| #include <device/pci_ops.h> |
| #include <acpi/acpi_gnvs.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include "chip.h" |
| #include "pch.h" |
| #include "nvs.h" |
| |
| /* Enable clock in PCI mode */ |
| static void serialio_enable_clock(struct resource *bar0) |
| { |
| u32 reg32 = read32(res2mmio(bar0, SIO_REG_PPR_CLOCK, 0)); |
| reg32 |= SIO_REG_PPR_CLOCK_EN; |
| write32(res2mmio(bar0, SIO_REG_PPR_CLOCK, 0), reg32); |
| } |
| |
| /* Put Serial IO D21:F0-F6 device into desired mode. */ |
| static void serialio_d21_mode(int sio_index, int int_pin, int acpi_mode) |
| { |
| u32 portctrl = SIO_IOBP_PORTCTRL_PM_CAP_PRSNT; |
| |
| /* Snoop select 1. */ |
| portctrl |= SIO_IOBP_PORTCTRL_SNOOP_SELECT(1); |
| |
| /* Set interrupt pin. */ |
| portctrl |= SIO_IOBP_PORTCTRL_INT_PIN(int_pin); |
| |
| if (acpi_mode) { |
| /* Enable ACPI interrupt mode. */ |
| portctrl |= SIO_IOBP_PORTCTRL_ACPI_IRQ_EN; |
| |
| /* Disable PCI config space. */ |
| portctrl |= SIO_IOBP_PORTCTRL_PCI_CONF_DIS; |
| } |
| |
| pch_iobp_update(SIO_IOBP_PORTCTRLX(sio_index), 0, portctrl); |
| } |
| |
| /* Put Serial IO D23:F0 device into desired mode. */ |
| static void serialio_d23_mode(int acpi_mode) |
| { |
| u32 portctrl = 0; |
| |
| /* Snoop select 1. */ |
| pch_iobp_update(SIO_IOBP_PORTCTRL1, 0, |
| SIO_IOBP_PORTCTRL1_SNOOP_SELECT(1)); |
| |
| if (acpi_mode) { |
| /* Enable ACPI interrupt mode. */ |
| portctrl |= SIO_IOBP_PORTCTRL0_ACPI_IRQ_EN; |
| |
| /* Disable PCI config space. */ |
| portctrl |= SIO_IOBP_PORTCTRL0_PCI_CONF_DIS; |
| } |
| |
| pch_iobp_update(SIO_IOBP_PORTCTRL0, 0, portctrl); |
| } |
| |
| /* Enable LTR Auto Mode for D21:F1-F6. */ |
| static void serialio_d21_ltr(struct resource *bar0) |
| { |
| u32 reg; |
| |
| /* 1. Program BAR0 + 808h[2] = 0b */ |
| reg = read32(res2mmio(bar0, SIO_REG_PPR_GEN, 0)); |
| reg &= ~SIO_REG_PPR_GEN_LTR_MODE_MASK; |
| write32(res2mmio(bar0, SIO_REG_PPR_GEN, 0), reg); |
| |
| /* 2. Program BAR0 + 804h[1:0] = 00b */ |
| reg = read32(res2mmio(bar0, SIO_REG_PPR_RST, 0)); |
| reg &= ~SIO_REG_PPR_RST_ASSERT; |
| write32(res2mmio(bar0, SIO_REG_PPR_RST, 0), reg); |
| |
| /* 3. Program BAR0 + 804h[1:0] = 11b */ |
| reg = read32(res2mmio(bar0, SIO_REG_PPR_RST, 0)); |
| reg |= SIO_REG_PPR_RST_ASSERT; |
| write32(res2mmio(bar0, SIO_REG_PPR_RST, 0), reg); |
| |
| /* 4. Program BAR0 + 814h[31:0] = 00000000h */ |
| write32(res2mmio(bar0, SIO_REG_AUTO_LTR, 0), 0); |
| } |
| |
| /* Enable LTR Auto Mode for D23:F0. */ |
| static void serialio_d23_ltr(struct resource *bar0) |
| { |
| u32 reg; |
| |
| /* Program BAR0 + 1008h[2] = 1b */ |
| reg = read32(res2mmio(bar0, SIO_REG_SDIO_PPR_GEN, 0)); |
| reg |= SIO_REG_PPR_GEN_LTR_MODE_MASK; |
| write32(res2mmio(bar0, SIO_REG_SDIO_PPR_GEN, 0), reg); |
| |
| /* Program BAR0 + 1010h = 0x00000000 */ |
| write32(res2mmio(bar0, SIO_REG_SDIO_PPR_SW_LTR, 0), 0); |
| |
| /* Program BAR0 + 3Ch[30] = 1b */ |
| reg = read32(res2mmio(bar0, SIO_REG_SDIO_PPR_CMD12, 0)); |
| reg |= SIO_REG_SDIO_PPR_CMD12_B30; |
| write32(res2mmio(bar0, SIO_REG_SDIO_PPR_CMD12, 0), reg); |
| } |
| |
| /* Select I2C voltage of 1.8V or 3.3V. */ |
| static void serialio_i2c_voltage_sel(struct resource *bar0, u8 voltage) |
| { |
| u32 reg32 = read32(res2mmio(bar0, SIO_REG_PPR_GEN, 0)); |
| reg32 &= ~SIO_REG_PPR_GEN_VOLTAGE_MASK; |
| reg32 |= SIO_REG_PPR_GEN_VOLTAGE(voltage); |
| write32(res2mmio(bar0, SIO_REG_PPR_GEN, 0), reg32); |
| } |
| |
| /* Init sequence to be run once, done as part of D21:F0 (SDMA) init. */ |
| static void serialio_init_once(int acpi_mode) |
| { |
| if (acpi_mode) { |
| /* Enable ACPI IRQ for IRQ13, IRQ7, IRQ6, IRQ5 in RCBA. */ |
| RCBA32_OR(ACPIIRQEN, (1 << 13)|(1 << 7)|(1 << 6)|(1 << 5)); |
| } |
| |
| /* Program IOBP CB000154h[12,9:8,4:0] = 1001100011111b. */ |
| pch_iobp_update(SIO_IOBP_GPIODF, ~0x0000131f, 0x0000131f); |
| |
| /* Program IOBP CB000180h[5:0] = 111111b (undefined register) */ |
| pch_iobp_update(0xcb000180, ~0x0000003f, 0x0000003f); |
| } |
| |
| static void serialio_init(struct device *dev) |
| { |
| struct southbridge_intel_lynxpoint_config *config = dev->chip_info; |
| struct resource *bar0, *bar1; |
| int sio_index = -1; |
| |
| printk(BIOS_DEBUG, "Initializing Serial IO device\n"); |
| |
| /* Ensure memory and bus master are enabled */ |
| pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); |
| |
| /* Find BAR0 and BAR1 */ |
| bar0 = find_resource(dev, PCI_BASE_ADDRESS_0); |
| if (!bar0) |
| return; |
| bar1 = find_resource(dev, PCI_BASE_ADDRESS_1); |
| if (!bar1) |
| return; |
| |
| if (!config->sio_acpi_mode) |
| serialio_enable_clock(bar0); |
| |
| switch (dev->path.pci.devfn) { |
| case PCH_DEVFN_SDMA: /* SDMA */ |
| sio_index = SIO_ID_SDMA; |
| serialio_init_once(config->sio_acpi_mode); |
| serialio_d21_mode(sio_index, SIO_PIN_INTB, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_I2C0: /* I2C0 */ |
| sio_index = SIO_ID_I2C0; |
| serialio_d21_ltr(bar0); |
| serialio_i2c_voltage_sel(bar0, config->sio_i2c0_voltage); |
| serialio_d21_mode(sio_index, SIO_PIN_INTC, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_I2C1: /* I2C1 */ |
| sio_index = SIO_ID_I2C1; |
| serialio_d21_ltr(bar0); |
| serialio_i2c_voltage_sel(bar0, config->sio_i2c1_voltage); |
| serialio_d21_mode(sio_index, SIO_PIN_INTC, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_SPI0: /* SPI0 */ |
| sio_index = SIO_ID_SPI0; |
| serialio_d21_ltr(bar0); |
| serialio_d21_mode(sio_index, SIO_PIN_INTC, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_SPI1: /* SPI1 */ |
| sio_index = SIO_ID_SPI1; |
| serialio_d21_ltr(bar0); |
| serialio_d21_mode(sio_index, SIO_PIN_INTC, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_UART0: /* UART0 */ |
| sio_index = SIO_ID_UART0; |
| serialio_d21_ltr(bar0); |
| serialio_d21_mode(sio_index, SIO_PIN_INTD, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_UART1: /* UART1 */ |
| sio_index = SIO_ID_UART1; |
| serialio_d21_ltr(bar0); |
| serialio_d21_mode(sio_index, SIO_PIN_INTD, |
| config->sio_acpi_mode); |
| break; |
| case PCH_DEVFN_SDIO: /* SDIO */ |
| sio_index = SIO_ID_SDIO; |
| serialio_d23_ltr(bar0); |
| serialio_d23_mode(config->sio_acpi_mode); |
| break; |
| default: |
| return; |
| } |
| |
| if (config->sio_acpi_mode) { |
| struct global_nvs *gnvs; |
| |
| /* Find ACPI NVS to update BARs */ |
| gnvs = acpi_get_gnvs(); |
| if (!gnvs) |
| return; |
| |
| /* Save BAR0 and BAR1 to ACPI NVS */ |
| gnvs->s0b[sio_index] = (u32)bar0->base; |
| gnvs->s1b[sio_index] = (u32)bar1->base; |
| } |
| } |
| |
| static struct device_operations device_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = serialio_init, |
| .ops_pci = &pci_dev_ops_pci, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| 0x9c60, /* 0:15.0 - SDMA */ |
| 0x9c61, /* 0:15.1 - I2C0 */ |
| 0x9c62, /* 0:15.2 - I2C1 */ |
| 0x9c65, /* 0:15.3 - SPI0 */ |
| 0x9c66, /* 0:15.4 - SPI1 */ |
| 0x9c63, /* 0:15.5 - UART0 */ |
| 0x9c64, /* 0:15.6 - UART1 */ |
| 0x9c35, /* 0:17.0 - SDIO */ |
| 0 |
| }; |
| |
| static const struct pci_driver pch_pcie __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |