A USB SuperSpeed Plus device may operate at different speed and lane count (i.e. gen2x2, gen1x2, or gen2x1). The DWC_usb32 IP supports SuperSpeed Plus gen2x2. To support this, this series update a few things to the USB gadget stack and dwc3 driver: * Accept and parse new maximum_speed devicetree property strings * Introduce enum usb_ssp_rate to describe the speed in SuperSpeed Plus genXxY * Capture the connected and max supported usb_ssp_rate * Report the device sublink speeds base on the usb_ssp_rate in the BOS descriptor * Introduce gadget ops to select SuperSpeed Plus various transfer rate and lane count * Update dwc3 driver to support the above changes Changes in v7: - Greg picked up the first few patches of the series to his usb-testing branch. Rebase the remaining patches on Greg's usb-testing branch Changes in v6: - Rebase on Greg's usb-testing branch - Update cover letter and title since there are many updates * Previous version 5: https://lore.kernel.org/linux-usb/cover.1601001199.git.Thinh.Nguyen@xxxxxxxxxxxx/ - To simplify things, use usb_ssp_rate enum to specify the signaling rate generation and lane count instead of separately tracking them. - Convert the sublink speed attributes to macros and move it to uapi - Remove usb_sublink_speed struct - Remove "usb: dwc3: gadget: Report sublink speed capability" - Update dwc3 to support the new changes Changes in v5: - Rebase on Felipe's testing/next branch - Changed Signed-off-by email to match From: email header - Add Rob's Reviewed-by Changes in v4: - Instead of using a single function to parse "maximum-speed" property for speed, gen X, and number of lanes, split those tasks to separate common functions - Revise DWC3 driver to use those new common functions - Fix checkpatch warnings for using "unsigned" rather than "unsigned int" and missing identifier name in udc_set_num_lanes_and_speed gadget ops Changes in v3: - Remove "num-lanes" and "lane-speed-mantissa-gbps" common properties - Remove "num-lanes" and "lane-speed-mantissa-gbps" properties validation in dwc3 - Update "maximum-speed" to support variations of SSP Gen X x Y - Update common function to parse new strings for "maximum-speed" - Update commit messages for the new changes Changes in v2: - Move usb_sublink_speed attribute struct and enum to include/linux/usb/ch9.h - Use "num-lanes" and "lane-speed-mantissa-gbps" as common properties instead - Add common functions to get num-lanes and lsm properties - Fix missing gen1x2 sublink speed attribute check report in dwc3 Thinh Nguyen (6): dt-binding: usb: Include USB SSP rates in GenXxY usb: common: Parse for USB SSP genXxY usb: dwc3: core: Check maximum_speed SSP genXxY usb: dwc3: gadget: Implement setting of SSP rate usb: dwc3: gadget: Track connected SSP rate and lane count usb: dwc3: gadget: Set speed only up to the max supported .../devicetree/bindings/usb/usb.yaml | 3 + drivers/usb/common/common.c | 26 +++++- drivers/usb/dwc3/core.c | 37 +++++++++ drivers/usb/dwc3/core.h | 9 +++ drivers/usb/dwc3/gadget.c | 80 ++++++++++++++++++- include/linux/usb/ch9.h | 11 +++ 6 files changed, 162 insertions(+), 4 deletions(-) base-commit: 7a79f1f7f7e75e532c5a803ab3ebf42a3e79497c -- 2.28.0
