Commit 6ed1233d authored by Hanjun Guo's avatar Hanjun Guo Committed by Yang Yingliang
Browse files

usb: xhci: Add workaround for phytium 



hulk inclusion
category: feature
bugzilla: NA
CVE: NA
---------------------------

Add workaround for phytium as the firmware didn't report the
DMA size info.

Signed-off-by: default avatarHanjun Guo <guohanjun@huawei.com>
Reviewed-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parent 6573f913

drivers/usb/host/xhci-pci.c

+14 −0
Original line number Diff line number Diff line
@@ -289,6 +289,18 @@ static int xhci_pci_setup(struct usb_hcd *hcd) 
	return xhci_pci_reinit(xhci, pdev);

}



#ifdef CONFIG_ARM64

#include <asm/cputype.h>

static void phytium_xhci_pci_workaround(struct pci_dev *dev)

{

	/* Firmware bug, DMA mask is not reported by the firmware */

	if (read_cpuid_implementor() == ARM_CPU_IMP_PHYTIUM)

		dma_set_mask(&dev->dev, DMA_BIT_MASK(64));

}

#else

static inline void phytium_xhci_pci_workaround(struct pci_dev *dev) { }

#endif



/*

 * We need to register our own PCI probe function (instead of the USB core's

 * function) in order to create a second roothub under xHCI.
@@ -302,6 +314,8 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) 


	driver = (struct hc_driver *)id->driver_data;



	phytium_xhci_pci_workaround(dev);



	/* Prevent runtime suspending between USB-2 and USB-3 initialization */

	pm_runtime_get_noresume(&dev->dev);