diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2025-02-12 21:28:03 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-14 09:29:20 +0100 |
| commit | 5425191f85fea2e10248c699d64382999cb78c34 (patch) | |
| tree | b0dde4bb83d096a9702a137a7ca3ec2ef4294be5 | |
| parent | eafba0205426091354f050381c32ad1567c35844 (diff) | |
usb: dwc3: gadget: Add support for snps,reserved-endpoints property
The snps,reserved-endpoints property lists the reserved endpoints
that shouldn't be used for normal transfers. Add support for that
to the driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Ferry Toth <fntoth@gmail.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20250212193116.2487289-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 73cebb7d90c2..f3ad8434366e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3403,14 +3403,53 @@ static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum) return 0; } +static int dwc3_gadget_get_reserved_endpoints(struct dwc3 *dwc, const char *propname, + u8 *eps, u8 num) +{ + u8 count; + int ret; + + if (!device_property_present(dwc->dev, propname)) + return 0; + + ret = device_property_count_u8(dwc->dev, propname); + if (ret < 0) + return ret; + count = ret; + + ret = device_property_read_u8_array(dwc->dev, propname, eps, min(num, count)); + if (ret) + return ret; + + return count; +} + static int dwc3_gadget_init_endpoints(struct dwc3 *dwc, u8 total) { + const char *propname = "snps,reserved-endpoints"; u8 epnum; + u8 reserved_eps[DWC3_ENDPOINTS_NUM]; + u8 count; + u8 num; + int ret; INIT_LIST_HEAD(&dwc->gadget->ep_list); + ret = dwc3_gadget_get_reserved_endpoints(dwc, propname, + reserved_eps, ARRAY_SIZE(reserved_eps)); + if (ret < 0) { + dev_err(dwc->dev, "failed to read %s\n", propname); + return ret; + } + count = ret; + for (epnum = 0; epnum < total; epnum++) { - int ret; + for (num = 0; num < count; num++) { + if (epnum == reserved_eps[num]) + break; + } + if (num < count) + continue; ret = dwc3_gadget_init_endpoint(dwc, epnum); if (ret) |