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usb: dwc3: gadget: Track connected SSP rate and lane count

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Track the number of connected lanes and speed in corresponding enum
usb_ssp_rate for SuperSpeed Plus capable device.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/2389592188d2e37a2ee45edaf04d942b19f3af82.1611106162.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thinh Nguyen 2021-01-19 17:36:34 -08:00 committed by Greg Kroah-Hartman
parent 072cab8a0f
commit f551037c07
2 changed files with 25 additions and 0 deletions
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2
drivers/usb/dwc3/core.h
View file

@ -461,6 +461,8 @@
#define DWC3_DEVTEN_USBRSTEN BIT(1)
#define DWC3_DEVTEN_DISCONNEVTEN BIT(0)
#define DWC3_DSTS_CONNLANES(n) (((n) >> 30) & 0x3) /* DWC_usb32 only */
/* Device Status Register */
#define DWC3_DSTS_DCNRD BIT(29)

23
drivers/usb/dwc3/gadget.c
View file

@ -2120,6 +2120,12 @@ static void __dwc3_gadget_set_speed(struct dwc3 *dwc)
reg |= DWC3_DCFG_SUPERSPEED_PLUS;
}
}
if (DWC3_IP_IS(DWC32) &&
dwc->gadget_max_speed > USB_SPEED_UNKNOWN &&
dwc->gadget_max_speed < USB_SPEED_SUPER_PLUS)
reg &= ~DWC3_DCFG_NUMLANES(~0);
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
}
@ -3369,12 +3375,18 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
struct dwc3_ep *dep;
int ret;
u32 reg;
u8 lanes = 1;
u8 speed;
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
speed = reg & DWC3_DSTS_CONNECTSPD;
dwc->speed = speed;
if (DWC3_IP_IS(DWC32))
lanes = DWC3_DSTS_CONNLANES(reg) + 1;
dwc->gadget->ssp_rate = USB_SSP_GEN_UNKNOWN;
/*
* RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed
* each time on Connect Done.
@ -3389,6 +3401,11 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dwc->gadget->ep0->maxpacket = 512;
dwc->gadget->speed = USB_SPEED_SUPER_PLUS;
if (lanes > 1)
dwc->gadget->ssp_rate = USB_SSP_GEN_2x2;
else
dwc->gadget->ssp_rate = USB_SSP_GEN_2x1;
break;
case DWC3_DSTS_SUPERSPEED:
/*
@ -3410,6 +3427,11 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dwc->gadget->ep0->maxpacket = 512;
dwc->gadget->speed = USB_SPEED_SUPER;
if (lanes > 1) {
dwc->gadget->speed = USB_SPEED_SUPER_PLUS;
dwc->gadget->ssp_rate = USB_SSP_GEN_1x2;
}
break;
case DWC3_DSTS_HIGHSPEED:
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64);
@ -3904,6 +3926,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
dev->platform_data = dwc;
dwc->gadget->ops = &dwc3_gadget_ops;
dwc->gadget->speed = USB_SPEED_UNKNOWN;
dwc->gadget->ssp_rate = USB_SSP_GEN_UNKNOWN;
dwc->gadget->sg_supported = true;
dwc->gadget->name = "dwc3-gadget";
dwc->gadget->lpm_capable = true;