Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 12:42:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: dwc3: Support EBC feature of DWC_usb31

Browse Source 
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>
This commit is contained in:
Manan Aurora 2023-10-31 03:46:41 +00:00 committed by Greg Kroah-Hartman
parent cd099cde4e
commit 398aa9a7e7
4 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/dwc3/core.h
View File

@ -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)

6
drivers/usb/dwc3/gadget.c
View File

@ -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, &params);
}

2
drivers/usb/dwc3/gadget.h
View File

@ -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)

1
include/linux/usb/gadget.h
View File

@ -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;