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FROMLIST: usb: xhci-plat: add xhci_plat_priv_overwrite

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Add an overwrite to platform specific callback for setting up the
xhci_vendor_ops, allow vendor to store the xhci_vendor_ops and
overwrite them when xhci_plat_probe invoked.

This change is depend on Commit in this patch series
("usb: host: add xhci hooks for USB offload"), vendor needs
to invoke xhci_plat_register_vendor_ops() to register the vendor specific
vendor_ops. And the vendor_ops will overwrite the vendor_ops inside
xhci_plat_priv in xhci_vendor_init() during xhci-plat-hcd probe.

Change-Id: I8030fe3bd274615f5926f19014c3a3e066ca9dba
Signed-off-by: Howard Yen <howardyen@google.com>
Bug: 175358363
Link: https://lore.kernel.org/r/20210119101044.1637023-1-howardyen@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Signed-off-by: JaeHun Jung <jh0801.jung@samsung.com>
This commit is contained in:
Howard Yen 2021-01-19 18:10:43 +08:00 committed by Greg Kroah-Hartman
parent 6496f6cfbb
commit 60662882b7
2 changed files with 27 additions and 0 deletions
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20
drivers/usb/host/xhci-plat.c
View File

@ -173,9 +173,26 @@ static const struct of_device_id usb_xhci_of_match[] = {
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif
static struct xhci_plat_priv_overwrite xhci_plat_vendor_overwrite;
int xhci_plat_register_vendor_ops(struct xhci_vendor_ops *vendor_ops)
{
if (vendor_ops == NULL)
return -EINVAL;
xhci_plat_vendor_overwrite.vendor_ops = vendor_ops;
return 0;
}
EXPORT_SYMBOL_GPL(xhci_plat_register_vendor_ops);
static int xhci_vendor_init(struct xhci_hcd *xhci)
{
struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
struct xhci_plat_priv *priv = xhci_to_priv(xhci);
if (xhci_plat_vendor_overwrite.vendor_ops)
ops = priv->vendor_ops = xhci_plat_vendor_overwrite.vendor_ops;
if (ops && ops->vendor_init)
return ops->vendor_init(xhci);
@ -185,9 +202,12 @@ static int xhci_vendor_init(struct xhci_hcd *xhci)
static void xhci_vendor_cleanup(struct xhci_hcd *xhci)
{
struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
struct xhci_plat_priv *priv = xhci_to_priv(xhci);
if (ops && ops->vendor_cleanup)
ops->vendor_cleanup(xhci);
priv->vendor_ops = NULL;
}
static int xhci_plat_probe(struct platform_device *pdev)

7
drivers/usb/host/xhci-plat.h
View File

@ -24,4 +24,11 @@ struct xhci_plat_priv {
#define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
#define xhci_to_priv(x) ((struct xhci_plat_priv *)(x)->priv)
struct xhci_plat_priv_overwrite {
struct xhci_vendor_ops *vendor_ops;
};
int xhci_plat_register_vendor_ops(struct xhci_vendor_ops *vendor_ops);
#endif /* _XHCI_PLAT_H */