From: Stefan Brüns Date: Sun, 17 Jan 2016 03:09:54 +0000 (+0100) Subject: usb: dwc2: add helper function for setting SPLIT HC registers X-Git-Tag: v2016.03-rc1~51^2~7 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=890f0ee4bb454712c302bd9d235091cd3fe70931;p=u-boot usb: dwc2: add helper function for setting SPLIT HC registers The split register setting is used for both SSPLIT and CSPLIT transactions, the bit for CSPLIT has to be set seperately. Signed-off-by: Stefan Brüns --- diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index 0e710d9d8a..7fbbc4bc7f 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -432,10 +432,23 @@ static void dwc_otg_hc_init(struct dwc2_core_regs *regs, uint8_t hc_num, */ writel(hcchar, &hc_regs->hcchar); - /* Program the HCSPLIT register for SPLITs */ + /* Program the HCSPLIT register, default to no SPLIT */ writel(0, &hc_regs->hcsplt); } +static void dwc_otg_hc_init_split(struct dwc2_hc_regs *hc_regs, + uint8_t hub_devnum, uint8_t hub_port) +{ + uint32_t hcsplt = 0; + + hcsplt = DWC2_HCSPLT_SPLTENA; + hcsplt |= hub_devnum << DWC2_HCSPLT_HUBADDR_OFFSET; + hcsplt |= hub_port << DWC2_HCSPLT_PRTADDR_OFFSET; + + /* Program the HCSPLIT register for SPLITs */ + writel(hcsplt, &hc_regs->hcsplt); +} + /* * DWC2 to USB API interface */