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| author | Seung-Woo Kim <sw0312.kim@samsung.com> | 2023-08-24 17:02:26 +0900 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2023-08-24 17:18:59 +0900 |
| commit | 148984e9cee3532fe11331fcab83f729a41e6bf4 (patch) | |
| tree | c7c321994a9f53aeaf627639d3dc75eb9be34ebf | |
| parent | 2328c5c76fccc1d784ba5ed9562e7caa75be08d8 (diff) | |
| download | linux-starfive-148984e9cee3532fe11331fcab83f729a41e6bf4.tar.gz linux-starfive-148984e9cee3532fe11331fcab83f729a41e6bf4.tar.bz2 linux-starfive-148984e9cee3532fe11331fcab83f729a41e6bf4.zip | |
WORKAROUND: usb: cdns3: Restore onchip memory reservationaccepted/tizen/unified/riscv/20230828.003411
Restore onchip meory reservation of disable in_ep when hw
configuration is not done as a workaround.
Without restoring, disabling and re-enabling eps causes
check failure of onchip memory reseration size.
This fixes usb communication failure of ffs_func_set_alt()
calling usb_ep_disable() and usb_ep_enable() for all ep.
Note: for non workaround, it should calculate exact reservation
size from ep type and usb speed and should restore out_ep memory
reservation when there is no more enabled out_ep.
Change-Id: Ifca0052f96fd777036e01b9ddb7ae6af54bba911
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
| -rw-r--r-- | drivers/usb/cdns3/cdns3-gadget.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 1dcadef933e3..ede4935826f3 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2452,6 +2452,16 @@ static int cdns3_gadget_ep_disable(struct usb_ep *ep) trace_cdns3_gadget_ep_disable(priv_ep); + /* + * WORKAROUND: before hw configuration, restore onchip memory + * reservation for each disabled in_ep with ep_buf_size + * + * for out_ep, only one onchip buffer is reused. + */ + if (!priv_dev->hw_configured_flag) + if (!!priv_ep->dir) + priv_dev->onchip_used_size -= priv_dev->ep_buf_size; + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress); ep_cfg = readl(&priv_dev->regs->ep_cfg); |