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usb: host: xhci-plat: fix cannot work if R-Car Gen2/3 run on above 4GB phys

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This patch fixes an issue that cannot work if R-Car Gen2/3 run on
above 4GB physical memory environment to use a quirk XHCI_NO_64BIT_SUPPORT.

Cc: <stable@vger.kernel.org>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda 2016-04-08 16:25:08 +03:00 committed by Greg Kroah-Hartman
parent 0a380be823
commit 5ad3b03e49
1 changed files with 13 additions and 0 deletions
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13
drivers/usb/host/xhci-plat.c
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@ -39,12 +39,25 @@ static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
struct usb_hcd *hcd = xhci_to_hcd(xhci);
/*
* As of now platform drivers don't provide MSI support so we ensure
* here that the generic code does not try to make a pci_dev from our
* dev struct in order to setup MSI
*/
xhci->quirks |= XHCI_PLAT;
/*
* On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
* to 1. However, these SoCs don't support 64-bit address memory
* pointers. So, this driver clears the AC64 bit of xhci->hcc_params
* to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
* xhci_gen_setup().
*/
if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
}
/* called during probe() after chip reset completes */