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xhci: Add quirks module option

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It makes easier for debugging some hardware specific issues.

Note that this option won't override the value to be set.  That is,
you can turn quirks on by this option but cannot turn them off if set
by the driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Takashi Iwai 2013-12-09 12:42:48 +01:00 committed by Sarah Sharp
parent 3d724fa513
commit 4e6a1ee72b
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/host/xhci.c
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@ -40,6 +40,10 @@ static int link_quirk;
module_param(link_quirk, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB");
static unsigned int quirks;
module_param(quirks, uint, S_IRUGO);
MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default");
/* TODO: copied from ehci-hcd.c - can this be refactored? */
/*
* xhci_handshake - spin reading hc until handshake completes or fails
@ -4770,6 +4774,8 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
xhci->hcc_params = readl(&xhci->cap_regs->hcc_params);
xhci_print_registers(xhci);
xhci->quirks = quirks;
get_quirks(dev, xhci);
/* In xhci controllers which follow xhci 1.0 spec gives a spurious