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usb: dwc2: add helper function for setting SPLIT HC registers

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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>
This commit is contained in:
Stefan Brüns 2016-01-17 04:09:54 +01:00 committed by Marek Vasut
parent daed305941
commit 890f0ee4bb
1 changed files with 14 additions and 1 deletions
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15
drivers/usb/host/dwc2.c
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@ -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
*/