On 06/04/17 09:59, Roger Quadros wrote:
Hi,
On 31/01/17 22:58, Bryan O'Donoghue wrote:
- DWC_USB3_NUM indicates the number of Device mode single directional
endpoints, including OUT and IN endpoint 0.
- DWC_USB3_NUM_IN_EPS indicates the maximum number of Device mode IN
endpoints active at any time, including control endpoint 0.
It's possible to configure RTL such that DWC_USB3_NUM_EPS is equal to
DWC_USB3_NUM_IN_EPS.
dwc3-core calculates the number of OUT endpoints as DWC_USB3_NUM minus
DWC_USB3_NUM_IN_EPS. If RTL has been configured with DWC_USB3_NUM_IN_EPS
equal to DWC_USB3_NUM then dwc3-core will calculate the number of OUT
endpoints as zero.
For example a from dwc3_core_num_eps() shows:
[ 1.565000] /usb0@f01d0000: found 8 IN and 0 OUT endpoints
This patch refactors the endpoint calculation down to one variable
dwc->num_eps taking care to maintain the current mapping of endpoints for
fixed FPGA configurations as described in Table 4-7 of version 2.60a of the
DWC USB3 databook.
The endpoint mapping will then be EP-OUT, EP-IN etc, up to DWC_USB3_NUM.
If DWC_USB3_NUM is odd then OUT will take the extra endpoint.
Suggested-by: Felipe Balbi <balbi@xxxxxxxxxx>
Signed-off-by: Bryan O'Donoghue <pure.logic@xxxxxxxxxxxxxxxxx>
This patch breaks gadget mode on dra7-evm that uses dwc3 core v2.02a.
I had to do the patch work on 4.1 and then forward port to 4.11 since
the SoC I was working on wasn't booting on 4.11 and (predictably I
guess) missed some untestable paths on 4.1
I have two SoCs to try this out on with 4.11+ now, so I'll send an
update shortly
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
