hda.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/device.h>
#include <device/azalia_device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/mmio.h>
#include <soc/pch.h>
#include <soc/rcba.h>
#include <southbridge/intel/lynxpoint/hda_verb.h>
 
static void hda_pch_init(struct device *dev, u8 *base)
{
        u8 reg8;
        u16 reg16;
        u32 reg32;
 
        if (RCBA32(0x2030) & (1 << 31)) {
                reg32 = pci_read_config32(dev, 0x120);
                reg32 &= 0xf8ffff01;
                reg32 |= (1 << 25);
                reg32 |= RCBA32(0x2030) & 0xfe;
                pci_write_config32(dev, 0x120, reg32);
        } else
                printk(BIOS_DEBUG, "HDA: V1CTL disabled.\n");
 
        reg32 = pci_read_config32(dev, 0x114);
        reg32 &= ~0xfe;
        pci_write_config32(dev, 0x114, reg32);
 
        // Set VCi enable bit
        if (pci_read_config32(dev, 0x120) & ((1 << 24) |
                                             (1 << 25) | (1 << 26))) {
                reg32 = pci_read_config32(dev, 0x120);
                reg32 &= ~(1 << 31);
                pci_write_config32(dev, 0x120, reg32);
        }
 
        /* Additional programming steps */
        reg32 = pci_read_config32(dev, 0xc4);
        reg32 |= (1 << 24);
        pci_write_config32(dev, 0xc4, reg32);
 
        reg8 = pci_read_config8(dev, 0x4d); // Docking Status
        reg8 &= ~(1 << 7); // Docking not supported
        pci_write_config8(dev, 0x4d, reg8);
 
        reg16 = read32(base + 0x0012);
        reg16 |= (1 << 0);
        write32(base + 0x0012, reg16);
 
        /* disable Auto Voltage Detector */
        reg8 = pci_read_config8(dev, 0x42);
        reg8 |= (1 << 2);
        pci_write_config8(dev, 0x42, reg8);
}
 
static void hda_init(struct device *dev)
{
        u8 *base;
        struct resource *res;
        u32 codec_mask;
 
        /* Find base address */
        res = probe_resource(dev, PCI_BASE_ADDRESS_0);
        if (!res)
                return;
 
        base = res2mmio(res, 0, 0);
        printk(BIOS_DEBUG, "HDA: base = %p\n", base);
 
        /* Set Bus Master */
        pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
 
        hda_pch_init(dev, base);
 
        codec_mask = hda_codec_detect(base);
 
        if (codec_mask) {
                printk(BIOS_DEBUG, "HDA: codec_mask = %02x\n", codec_mask);
                azalia_codecs_init(base, codec_mask);
        }
}
 
static void hda_enable(struct device *dev)
{
        u16 reg16;
        u8 reg8;
 
        reg8 = pci_read_config8(dev, 0x43);
        reg8 |= 0x6f;
        pci_write_config8(dev, 0x43, reg8);
 
        if (!dev->enabled) {
                /* Route I/O buffers to ADSP function */
                reg8 = pci_read_config8(dev, 0x42);
                reg8 |= (1 << 7) | (1 << 6);
                pci_write_config8(dev, 0x42, reg8);
 
                printk(BIOS_INFO, "HDA disabled, I/O buffers routed to ADSP\n");
 
                /* 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);
 
                /* Disable this device */
                pch_disable_devfn(dev);
        }
}
 
static void hda_final(struct device *dev)
{
        /* Set HDCFG.BCLD */
        pci_or_config16(dev, 0x40, 1 << 1);
}
 
static struct device_operations hda_ops = {
        .read_resources         = &pci_dev_read_resources,
        .set_resources          = &pci_dev_set_resources,
        .enable_resources       = &pci_dev_enable_resources,
        .init                   = &hda_init,
        .enable                 = &hda_enable,
        .final                  = &hda_final,
        .ops_pci                = &pci_dev_ops_pci,
};
 
static const unsigned short pci_device_ids[] = {
        0x9c20, /* LynxPoint-LP */
        0x9ca0, /* WildcatPoint */
        0
};
 
static const struct pci_driver pch_hda __pci_driver = {
        .ops     = &hda_ops,
        .vendor  = PCI_VID_INTEL,
        .devices = pci_device_ids,
};