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lp/drivers/usb: Add quirk for QEMU XHCI root hub 

The QEMU XHCI driver does not implement the Port Change Detect bit
in the USBSTS register.  As a result no devices are attached without
looking at each port individually.

Detect this as a quirk based on the QEMU XHCI controller PCI ID,
and apply it to the root hub quirk list so it can get used by the
generic hub driver to skip this check.

With this change an attached USB mass storage device is detected and
able to boot when supplied to qemu:

  -drive if=none,id=usbmsc,format=raw,file=/tmp/disk.img
  -device qemu-xhci,id-xhci
  -device usb-storage,bus=xhci.0,drive=usbmsc

Change-Id: I6689cb1dbb24c93d45f5c5ef040b713925d07588
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39839
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Duncan Laurie 2020-03-18 12:19:14 -07:00 committed by Patrick Georgi
parent 2d7173d462
commit 7724f1142e
4 changed files with 34 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
payloads/libpayload/drivers/usb/generic_hub.c
View File

@ -218,9 +218,11 @@ generic_hub_poll(usbdev_t *const dev)
if (!hub)
return;
if (hub->ops->hub_status_changed &&
hub->ops->hub_status_changed(dev) != 1)
if (!(dev->quirks & USB_QUIRK_HUB_NO_USBSTS_PCD) &&
hub->ops->hub_status_changed &&
hub->ops->hub_status_changed(dev) != 1) {
return;
}
int port;
for (port = 1; port <= hub->num_ports; ++port) {

24
payloads/libpayload/drivers/usb/quirks.c
View File

@ -59,6 +59,30 @@ usb_quirks_t usb_quirks[] = {
*/
};
#if CONFIG(LP_USB_PCI)
usb_quirks_t pci_quirks[] = {
/* QEMU XHCI root hub does not implement port change detect */
{ 0x1b36, 0x000d, USB_QUIRK_HUB_NO_USBSTS_PCD, 0 },
};
u32 pci_quirk_check(pcidev_t controller)
{
int i;
u16 vendor = pci_read_config16(controller, REG_VENDOR_ID);
u16 device = pci_read_config16(controller, REG_DEVICE_ID);
for (i = 0; i < ARRAY_SIZE(pci_quirks); i++) {
if ((pci_quirks[i].vendor == vendor) &&
(pci_quirks[i].device == device)) {
printf("PCI quirks enabled: %08x\n", pci_quirks[i].quirks);
return pci_quirks[i].quirks;
}
}
return USB_QUIRK_NONE;
}
#endif
u32 usb_quirk_check(u16 vendor, u16 device)
{
int i;

4
payloads/libpayload/drivers/usb/xhci.c
View File

@ -314,9 +314,13 @@ xhci_pci_init (pcidev_t addr)
controller = xhci_init((unsigned long)reg_addr);
if (controller) {
xhci_t *xhci = controller->instance;
controller->pcidev = addr;
xhci_switch_ppt_ports(addr);
/* Set up any quirks for controller root hub */
xhci->roothub->quirks = pci_quirk_check(addr);
}
return controller;

2
payloads/libpayload/include/usb/usb.h
View File

@ -318,6 +318,7 @@ void usb_detach_device(hci_t *controller, int devno);
int usb_attach_device(hci_t *controller, int hubaddress, int port,
usb_speed speed);
u32 pci_quirk_check(pcidev_t controller);
u32 usb_quirk_check(u16 vendor, u16 device);
int usb_interface_check(u16 vendor, u16 device);
@ -330,6 +331,7 @@ int usb_interface_check(u16 vendor, u16 device);
#define USB_QUIRK_MSC_FORCE_TRANS_CBI_I (1 << 6)
#define USB_QUIRK_MSC_NO_TEST_UNIT_READY (1 << 7)
#define USB_QUIRK_MSC_SHORT_INQUIRY (1 << 8)
#define USB_QUIRK_HUB_NO_USBSTS_PCD (1 << 9)
#define USB_QUIRK_TEST (1 << 31)
#define USB_QUIRK_NONE 0