diff options
Diffstat (limited to 'src/soc/intel/broadwell/hda.c')
| -rw-r--r-- | src/soc/intel/broadwell/hda.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/hda.c b/src/soc/intel/broadwell/hda.c index 9a9225b479..80caa2c2eb 100644 --- a/src/soc/intel/broadwell/hda.c +++ b/src/soc/intel/broadwell/hda.c @@ -27,6 +27,7 @@ #include <arch/io.h> #include <delay.h> #include <soc/intel/common/hda_verb.h> +#include <broadwell/pch.h> #include <broadwell/ramstage.h> #include <broadwell/rcba.h> @@ -134,11 +135,35 @@ static void hda_init(struct device *dev) } } +static void hda_enable(struct device *dev) +{ + u32 reg32; + + if (!dev->enabled) { + /* Route I/O buffers to ADSP function */ + reg32 = pci_read_config32(dev, 0x42); + reg32 |= (1 << 7) | (1 << 6); + pci_write_config32(dev, 0x42, reg32); + + printk(BIOS_INFO, "HDA disabled, I/O buffers routed to ADSP\n"); + + /* Ensure memory, io, and bus master are all disabled */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 &= ~(PCI_COMMAND_MASTER | + PCI_COMMAND_MEMORY | PCI_COMMAND_IO); + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Disable this device */ + pch_disable_devfn(dev); + } +} + 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, .ops_pci = &broadwell_pci_ops, }; |