diff options
| author | Manan Aurora <maurora@google.com> | 2023-10-31 06:46:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-04 18:00:41 +0300 |
| commit | 398aa9a7e77cf23c2a6f882ddd3dcd96f21771dc (patch) | |
| tree | 1f876a8eabac27cd13b1eb1384482a9591c6c7ae | |
| parent | cd099cde4ed264403b434d8344994f97ac2a4349 (diff) | |
| download | linux-398aa9a7e77cf23c2a6f882ddd3dcd96f21771dc.tar.xz | |
usb: dwc3: Support EBC feature of DWC_usb31
Support configuration and use of bulk endpoints in the so-called EBC
mode described in the DBC_usb31 databook (appendix E)
Added a bit fifo_mode to usb_ep to indicate to the UDC driver that a
specific endpoint is to operate in the EBC (or equivalent) mode when
enabled
Added macros for bits 15 and 14 of DEPCFG parameter 1 to indicate EBC
mode and write back behaviour. These bits will be set to 1 when
configuring an EBC endpoint as described in the programming guide
Signed-off-by: Manan Aurora <maurora@google.com>
Link: https://lore.kernel.org/r/20231031034641.660606-1-maurora@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/core.h | 1 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 6 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.h | 2 | ||||
| -rw-r--r-- | include/linux/usb/gadget.h | 1 |
4 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index e120611a5174..e3eea965e57b 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -376,6 +376,7 @@ /* Global HWPARAMS4 Register */ #define DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(n) (((n) & (0x0f << 13)) >> 13) #define DWC3_MAX_HIBER_SCRATCHBUFS 15 +#define DWC3_EXT_BUFF_CONTROL BIT(21) /* Global HWPARAMS6 Register */ #define DWC3_GHWPARAMS6_BCSUPPORT BIT(14) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 88d8d589f014..c15e965ea95a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -673,6 +673,12 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action) params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(bInterval_m1); } + if (dep->endpoint.fifo_mode) { + if (!(dwc->hwparams.hwparams4 & DWC3_EXT_BUFF_CONTROL)) + return -EINVAL; + params.param1 |= DWC3_DEPCFG_EBC_HWO_NOWB | DWC3_DEPCFG_USE_EBC; + } + return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETEPCONFIG, ¶ms); } diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h index 55a56cf67d73..fd7a4e94397e 100644 --- a/drivers/usb/dwc3/gadget.h +++ b/drivers/usb/dwc3/gadget.h @@ -26,6 +26,8 @@ struct dwc3; #define DWC3_DEPCFG_XFER_NOT_READY_EN BIT(10) #define DWC3_DEPCFG_FIFO_ERROR_EN BIT(11) #define DWC3_DEPCFG_STREAM_EVENT_EN BIT(13) +#define DWC3_DEPCFG_EBC_HWO_NOWB BIT(14) +#define DWC3_DEPCFG_USE_EBC BIT(15) #define DWC3_DEPCFG_BINTERVAL_M1(n) (((n) & 0xff) << 16) #define DWC3_DEPCFG_STREAM_CAPABLE BIT(24) #define DWC3_DEPCFG_EP_NUMBER(n) (((n) & 0x1f) << 25) diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 6532beb587b1..a771ccc038ac 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -236,6 +236,7 @@ struct usb_ep { unsigned max_streams:16; unsigned mult:2; unsigned maxburst:5; + unsigned fifo_mode:1; u8 address; const struct usb_endpoint_descriptor *desc; const struct usb_ss_ep_comp_descriptor *comp_desc; |