diff options
Diffstat (limited to 'src/soc/intel/broadwell/pch/ehci.c')
-rw-r--r-- | src/soc/intel/broadwell/pch/ehci.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/pch/ehci.c b/src/soc/intel/broadwell/pch/ehci.c new file mode 100644 index 0000000000..5b977dd3c6 --- /dev/null +++ b/src/soc/intel/broadwell/pch/ehci.c @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ehci.h> +#include <device/pci_ops.h> +#include <soc/ehci.h> +#include <soc/pch.h> + +static void usb_ehci_set_subsystem(struct device *dev, unsigned int vendor, + unsigned int device) +{ + u8 access_cntl; + + access_cntl = pci_read_config8(dev, 0x80); + + /* Enable writes to protected registers. */ + pci_write_config8(dev, 0x80, access_cntl | 1); + + pci_dev_set_subsystem(dev, vendor, device); + + /* Restore protection. */ + pci_write_config8(dev, 0x80, access_cntl); +} + +static void ehci_enable(struct device *dev) +{ + if (CONFIG(USBDEBUG)) + dev->enabled = 1; + else + pch_disable_devfn(dev); +} + +static struct pci_operations ehci_ops_pci = { + .set_subsystem = &usb_ehci_set_subsystem, +}; + +static struct device_operations usb_ehci_ops = { + .read_resources = pci_ehci_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .ops_pci = &ehci_ops_pci, + .enable = ehci_enable, +}; + +static const unsigned short pci_device_ids[] = { + 0x9c26, /* LynxPoint-LP */ + 0x9ca6, /* WildcatPoint */ + 0 +}; + +static const struct pci_driver pch_usb_ehci __pci_driver = { + .ops = &usb_ehci_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .devices = pci_device_ids, +}; |