diff options
| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2021-01-19 17:36:34 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-06 14:21:21 +0100 |
| commit | f551037c0770d07e4669d7d4fa423c235291dc59 (patch) | |
| tree | e74772559601eaeced27a2629d763414d4d1d141 /drivers/usb | |
| parent | 072cab8a0fe276282272e57138d83299e35455eb (diff) | |
| download | linux-f551037c0770d07e4669d7d4fa423c235291dc59.tar.bz2 | |
usb: dwc3: gadget: Track connected SSP rate and lane count
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/core.h | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 23 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 61ac298f3e8e..052b20d52651 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -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) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 14ab5594a595..0aa89e704a55 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -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; |