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| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-04-14 15:03:39 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-04-19 11:11:57 +0300 |
| commit | cf6d867d3b57d4eca229b3c506216d98d88be49c (patch) | |
| tree | 238bf69d08a53fec016819fc1d69423647c69364 /drivers/usb/dwc3/core.c | |
| parent | 097aa1975e9a5b189d4c6fbc95c0f97e2c49c01e (diff) | |
| download | linux-cf6d867d3b57d4eca229b3c506216d98d88be49c.tar.gz | |
usb: dwc3: core: add fifo space helper
this helper will be used, initially, to dump space of different queues and fifos in dwc3 to debugfs. Later, it'll be used to issue remote wakeup when we want to start a transfer and there's something in a TX FIFO. Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 6f57929f09b4..c050a88c16d4 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -60,6 +60,20 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode) dwc3_writel(dwc->regs, DWC3_GCTL, reg); } +u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type) +{ + struct dwc3 *dwc = dep->dwc; + u32 reg; + + dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE, + DWC3_GDBGFIFOSPACE_NUM(dep->number) | + DWC3_GDBGFIFOSPACE_TYPE(type)); + + reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE); + + return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg); +} + /** * dwc3_core_soft_reset - Issues core soft reset and PHY reset * @dwc: pointer to our context structure |