diff options
| author | Stefan Brüns | 2016-01-17 04:09:54 +0100 |
|---|---|---|
| committer | Marek Vasut | 2016-01-23 16:21:11 +0100 |
| commit | 890f0ee4bb454712c302bd9d235091cd3fe70931 (patch) | |
| tree | c6121dd18cedbaec6fd9dfa1d3ffec3d9f690ede /drivers | |
| parent | daed305941eb7ff30039af8142c2392bd5c3ad91 (diff) | |
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 <stefan.bruens@rwth-aachen.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/dwc2.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index 0e710d9d8af..7fbbc4bc7f9 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 */ |