/* * This file is part of the coreboot project. * * Copyright (C) 2013 Google Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <arch/io.h> #include <cbmem.h> #include <console/console.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_ids.h> #include <reg_script.h> #include <soc/iomap.h> #include <soc/iosf.h> #include <soc/lpc.h> #include <soc/nvs.h> #include <soc/pattrs.h> #include <soc/pci_devs.h> #include <soc/pmc.h> #include <soc/ramstage.h> #include "chip.h" /* The LPE audio devices needs 1MiB of memory reserved aligned to a 512MiB * address. Just take 1MiB @ 512MiB. */ #define FIRMWARE_PHYS_BASE (512 << 20) #define FIRMWARE_PHYS_LENGTH (1 << 20) #define FIRMWARE_PCI_REG_BASE 0xa8 #define FIRMWARE_PCI_REG_LENGTH 0xac #define FIRMWARE_REG_BASE_C0 0x144000 #define FIRMWARE_REG_LENGTH_C0 (FIRMWARE_REG_BASE_C0 + 4) static void assign_device_nvs(device_t dev, u32 *field, unsigned index) { struct resource *res; res = find_resource(dev, index); if (res) *field = res->base; } static void lpe_enable_acpi_mode(device_t dev) { static const struct reg_script ops[] = { /* Disable PCI interrupt, enable Memory and Bus Master */ REG_PCI_OR32(PCI_COMMAND, PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | (1<<10)), /* Enable ACPI mode */ REG_IOSF_OR(IOSF_PORT_0x58, LPE_PCICFGCTR1, LPE_PCICFGCTR1_PCI_CFG_DIS | LPE_PCICFGCTR1_ACPI_INT_EN), REG_SCRIPT_END }; global_nvs_t *gnvs; /* Find ACPI NVS to update BARs */ gnvs = (global_nvs_t *)cbmem_find(CBMEM_ID_ACPI_GNVS); if (!gnvs) { printk(BIOS_ERR, "Unable to locate Global NVS\n"); return; } /* Save BAR0, BAR1, and firmware base to ACPI NVS */ assign_device_nvs(dev, &gnvs->dev.lpe_bar0, PCI_BASE_ADDRESS_0); assign_device_nvs(dev, &gnvs->dev.lpe_bar1, PCI_BASE_ADDRESS_1); assign_device_nvs(dev, &gnvs->dev.lpe_fw, FIRMWARE_PCI_REG_BASE); /* Device is enabled in ACPI mode */ gnvs->dev.lpe_en = 1; /* Put device in ACPI mode */ reg_script_run_on_dev(dev, ops); } static void setup_codec_clock(device_t dev) { uint32_t reg; u32 *clk_reg; struct soc_intel_baytrail_config *config; const char *freq_str; config = dev->chip_info; switch (config->lpe_codec_clk_freq) { case 19: freq_str = "19.2"; reg = CLK_FREQ_19P2MHZ; break; case 25: freq_str = "25"; reg = CLK_FREQ_25MHZ; break; default: printk(BIOS_DEBUG, "LPE codec clock not required.\n"); return; } /* Default to always running. */ reg |= CLK_CTL_ON; if (config->lpe_codec_clk_num < 0 || config->lpe_codec_clk_num > 5) { printk(BIOS_DEBUG, "Invalid LPE codec clock number.\n"); return; } printk(BIOS_DEBUG, "LPE Audio codec clock set to %sMHz.\n", freq_str); clk_reg = (u32 *)(PMC_BASE_ADDRESS + PLT_CLK_CTL_0); clk_reg += config->lpe_codec_clk_num; write32(clk_reg, (read32(clk_reg) & ~0x7) | reg); } static void lpe_stash_firmware_info(device_t dev) { struct resource *res; struct resource *mmio; const struct pattrs *pattrs = pattrs_get(); res = find_resource(dev, FIRMWARE_PCI_REG_BASE); if (res == NULL) { printk(BIOS_DEBUG, "LPE Firmware memory not found.\n"); return; } /* Continue using old way of informing firmware address / size. */ pci_write_config32(dev, FIRMWARE_PCI_REG_BASE, res->base); pci_write_config32(dev, FIRMWARE_PCI_REG_LENGTH, res->size); /* C0 and later steppings use an offset in the MMIO space. */ if (pattrs->stepping >= STEP_C0) { mmio = find_resource(dev, PCI_BASE_ADDRESS_0); write32((u32 *)(uintptr_t)(mmio->base + FIRMWARE_REG_BASE_C0), res->base); write32((u32 *)(uintptr_t)(mmio->base + FIRMWARE_REG_LENGTH_C0), res->size); } } static void lpe_init(device_t dev) { struct soc_intel_baytrail_config *config = dev->chip_info; lpe_stash_firmware_info(dev); setup_codec_clock(dev); if (config->lpe_acpi_mode) lpe_enable_acpi_mode(dev); } static void lpe_read_resources(device_t dev) { pci_dev_read_resources(dev); reserved_ram_resource(dev, FIRMWARE_PCI_REG_BASE, FIRMWARE_PHYS_BASE >> 10, FIRMWARE_PHYS_LENGTH >> 10); } static const struct device_operations device_ops = { .read_resources = lpe_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = lpe_init, .enable = NULL, .scan_bus = NULL, .ops_pci = &soc_pci_ops, }; static const struct pci_driver southcluster __pci_driver = { .ops = &device_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = LPE_DEVID, };