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usb: gadget: composite: Return SSP Dev Cap descriptor
If a gadget supports SuperSpeedPlus or higher speeds, return a SuperSpeedPlus USB Device Capability descriptor. Currently this implementation returns a fixed descriptor with typical values set. Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
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@ -597,6 +597,48 @@ static int bos_desc(struct usb_composite_dev *cdev)
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ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
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ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
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/* The SuperSpeedPlus USB Device Capability descriptor */
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if (gadget_is_superspeed_plus(cdev->gadget)) {
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struct usb_ssp_cap_descriptor *ssp_cap;
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ssp_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
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bos->bNumDeviceCaps++;
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/*
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* Report typical values.
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*/
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le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SSP_CAP_SIZE(1));
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ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(1);
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ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
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ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE;
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/* SSAC = 1 (2 attributes) */
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ssp_cap->bmAttributes = cpu_to_le32(1);
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/* Min RX/TX Lane Count = 1 */
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ssp_cap->wFunctionalitySupport = (1 << 8) | (1 << 12);
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/*
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* bmSublinkSpeedAttr[0]:
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* ST = Symmetric, RX
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* LSE = 3 (Gbps)
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* LP = 1 (SuperSpeedPlus)
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* LSM = 10 (10 Gbps)
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*/
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ssp_cap->bmSublinkSpeedAttr[0] =
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(3 << 4) | (1 << 14) | (0xa << 16);
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/*
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* bmSublinkSpeedAttr[1] =
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* ST = Symmetric, TX
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* LSE = 3 (Gbps)
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* LP = 1 (SuperSpeedPlus)
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* LSM = 10 (10 Gbps)
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*/
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ssp_cap->bmSublinkSpeedAttr[1] =
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(3 << 4) | (1 << 14) | (0xa << 16) | (1 << 7);
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}
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return le16_to_cpu(bos->wTotalLength);
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}
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