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usb: xhci-dwc3: Add support for USB 3.1 controllers

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This adds support for the DWC_sub31 controllers such as those
found on Apple's M1 SoC.  This version of the controller
seems to work fine with the existing driver.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
This commit is contained in:
Mark Kettenis 2021-09-16 16:00:09 +02:00 • committed by Marek Vasut
parent 0f513c5975
commit 53eed9adfa
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/host/xhci-dwc3.c
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@ -74,7 +74,8 @@ int dwc3_core_init(struct dwc3 *dwc3_reg)
revision = readl(&dwc3_reg->g_snpsid);
/* This should read as U3 followed by revision number */
if ((revision & DWC3_GSNPSID_MASK) != 0x55330000) {
if ((revision & DWC3_GSNPSID_MASK) != 0x55330000 &&
(revision & DWC3_GSNPSID_MASK) != 0x33310000) {
puts("this is not a DesignWare USB3 DRD Core\n");
return -1;
}