/* SPDX-License-Identifier: GPL-2.0-only */ #include <stdint.h> #include <acpi/acpi_gnvs.h> #include <console/console.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_ids.h> #include <reg_script.h> #include <soc/iosf.h> #include <soc/nvs.h> #include <soc/pci_devs.h> #include <soc/ramstage.h> #include "chip.h" static void dev_enable_acpi_mode(struct device *dev, int iosf_reg, int nvs_index) { struct reg_script ops[] = { /* Disable PCI interrupt, enable Memory and Bus Master */ REG_PCI_OR16(PCI_COMMAND, PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INT_DISABLE), /* Enable ACPI mode */ REG_IOSF_OR(IOSF_PORT_LPSS, iosf_reg, LPSS_CTL_PCI_CFG_DIS | LPSS_CTL_ACPI_INT_EN), REG_SCRIPT_END }; struct resource *bar; struct global_nvs *gnvs; /* Find ACPI NVS to update BARs */ gnvs = acpi_get_gnvs(); if (!gnvs) return; /* Save BAR0 and BAR1 to ACPI NVS */ bar = find_resource(dev, PCI_BASE_ADDRESS_0); if (bar) gnvs->dev.lpss_bar0[nvs_index] = (u32)bar->base; bar = find_resource(dev, PCI_BASE_ADDRESS_1); if (bar) gnvs->dev.lpss_bar1[nvs_index] = (u32)bar->base; /* Device is enabled in ACPI mode */ gnvs->dev.lpss_en[nvs_index] = 1; /* Put device in ACPI mode */ reg_script_run_on_dev(dev, ops); } #define SET_IOSF_REG(name_) \ case PCI_DEVFN(name_ ## _DEV, name_ ## _FUNC): \ do { \ *iosf_reg = LPSS_ ## name_ ## _CTL; \ *nvs_index = LPSS_NVS_ ## name_; \ } while (0) static void dev_ctl_reg(struct device *dev, int *iosf_reg, int *nvs_index) { *iosf_reg = -1; *nvs_index = -1; switch (dev->path.pci.devfn) { SET_IOSF_REG(SIO_DMA1); break; SET_IOSF_REG(I2C1); break; SET_IOSF_REG(I2C2); break; SET_IOSF_REG(I2C3); break; SET_IOSF_REG(I2C4); break; SET_IOSF_REG(I2C5); break; SET_IOSF_REG(I2C6); break; SET_IOSF_REG(I2C7); break; SET_IOSF_REG(SIO_DMA2); break; SET_IOSF_REG(PWM1); break; SET_IOSF_REG(PWM2); break; SET_IOSF_REG(HSUART1); break; SET_IOSF_REG(HSUART2); break; SET_IOSF_REG(SPI); break; } } #define CASE_I2C(name_) case PCI_DEVFN(name_ ## _DEV, name_ ## _FUNC) static void i2c_disable_resets(struct device *dev) { /* Release the I2C devices from reset. */ static const struct reg_script ops[] = { REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x804, 0x3), REG_SCRIPT_END, }; switch (dev->path.pci.devfn) { CASE_I2C(I2C1) : CASE_I2C(I2C2) : CASE_I2C(I2C3) : CASE_I2C(I2C4) : CASE_I2C(I2C5) : CASE_I2C(I2C6) : CASE_I2C(I2C7) : printk(BIOS_DEBUG, "Releasing I2C device from reset.\n"); reg_script_run_on_dev(dev, ops); break; default: return; } } static void lpss_init(struct device *dev) { struct soc_intel_braswell_config *config = config_of(dev); int iosf_reg, nvs_index; dev_ctl_reg(dev, &iosf_reg, &nvs_index); if (iosf_reg < 0) { int slot = PCI_SLOT(dev->path.pci.devfn); int func = PCI_FUNC(dev->path.pci.devfn); printk(BIOS_DEBUG, "Could not find iosf_reg for %02x.%01x\n", slot, func); return; } i2c_disable_resets(dev); if (config->lpss_acpi_mode) dev_enable_acpi_mode(dev, iosf_reg, nvs_index); } 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 = lpss_init, .ops_pci = &soc_pci_ops, }; static const unsigned short pci_device_ids[] = { SIO_DMA1_DEVID, I2C1_DEVID, I2C2_DEVID, I2C3_DEVID, I2C4_DEVID, I2C5_DEVID, I2C6_DEVID, I2C7_DEVID, SIO_DMA2_DEVID, PWM1_DEVID, PWM2_DEVID, HSUART1_DEVID, HSUART2_DEVID, SPI_DEVID, 0, }; static const struct pci_driver southcluster __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .devices = pci_device_ids, };