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usb: host: Add support for usb core indexing

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Unique usb core id is used to differentiate between
different usb controllers.

Change-Id: Ibd886f704e7ecedfbf035b8e5adea2852ddf25bf
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2017-08-18 16:40:58 -07:00 • committed by Ajay Agarwal
parent d33ed6b2cc
commit 03a86f5cb1
3 changed files with 7 additions and 0 deletions
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1
Documentation/devicetree/bindings/usb/dwc3.txt
View file

@ -61,6 +61,7 @@ Optional properties:
- snps,num-gsi-evt-buffs: If present, specifies number of GSI based hardware accelerated event buffers. - snps,num-gsi-evt-buffs: If present, specifies number of GSI based hardware accelerated event buffers.
1 event buffer is needed per h/w accelerated endpoint. 1 event buffer is needed per h/w accelerated endpoint.
- xhci-imod-value: Interrupt moderation interval for host mode (in increments of 250nsec). - xhci-imod-value: Interrupt moderation interval for host mode (in increments of 250nsec).
- usb-core-id: Differentiates between different controllers present on a device.
This is usually a subnode to DWC3 glue to which it is connected. This is usually a subnode to DWC3 glue to which it is connected.

4
drivers/usb/host/xhci-plat.c
View file

@ -233,6 +233,10 @@ static int xhci_plat_probe(struct platform_device *pdev)
hcd_to_bus(xhci->shared_hcd)->skip_resume = true; hcd_to_bus(xhci->shared_hcd)->skip_resume = true;
if (device_property_read_u32(pdev->dev.parent, "usb-core-id",
&xhci->core_id))
xhci->core_id = -EINVAL;
hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
if (IS_ERR(hcd->usb_phy)) { if (IS_ERR(hcd->usb_phy)) {
ret = PTR_ERR(hcd->usb_phy); ret = PTR_ERR(hcd->usb_phy);

2
drivers/usb/host/xhci.h
View file

@ -1519,6 +1519,8 @@ struct xhci_hcd {
/* secondary interrupter */ /* secondary interrupter */
struct xhci_intr_reg __iomem **sec_ir_set; struct xhci_intr_reg __iomem **sec_ir_set;
int core_id;
/* Cached register copies of read-only HC data */ /* Cached register copies of read-only HC data */
__u32 hcs_params1; __u32 hcs_params1;
__u32 hcs_params2; __u32 hcs_params2;