diff options
| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2021-03-11 16:58:50 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-23 12:40:32 +0100 |
| commit | 0c59f678fcfc6dd53ba493915794636a230bc4cc (patch) | |
| tree | df9872bb44fc2fc7176325082f6cac9cf57b9f71 | |
| parent | 575b1ac410a2da1b76c9662dbeb8e500d061fbf2 (diff) | |
| download | linux-0c59f678fcfc6dd53ba493915794636a230bc4cc.tar.bz2 | |
usb: dwc3: gadget: Remove invalid low-speed setting
None of the DWC_usb3x IPs (and all their versions) supports low-speed
setting in device mode. In the early days, our "Early Adopter Edition"
DWC_usb3 databook shows that the controller may be configured to operate
in low-speed, but it was revised on release. Let's remove this invalid
speed setting to avoid any confusion.
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/258b1c7fbb966454f4c4c2c1367508998498fc30.1615509438.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/core.c | 1 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.h | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 8 |
3 files changed, 0 insertions, 11 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 94fdbe502ce9..05e2e54cbbdc 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1394,7 +1394,6 @@ static void dwc3_check_params(struct dwc3 *dwc) /* Check the maximum_speed parameter */ switch (dwc->maximum_speed) { - case USB_SPEED_LOW: case USB_SPEED_FULL: case USB_SPEED_HIGH: break; diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index ce6bd84e2b39..4ca4b4be85e4 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -398,7 +398,6 @@ #define DWC3_DCFG_SUPERSPEED (4 << 0) #define DWC3_DCFG_HIGHSPEED (0 << 0) #define DWC3_DCFG_FULLSPEED BIT(0) -#define DWC3_DCFG_LOWSPEED (2 << 0) #define DWC3_DCFG_NUMP_SHIFT 17 #define DWC3_DCFG_NUMP(n) (((n) >> DWC3_DCFG_NUMP_SHIFT) & 0x1f) @@ -492,7 +491,6 @@ #define DWC3_DSTS_SUPERSPEED (4 << 0) #define DWC3_DSTS_HIGHSPEED (0 << 0) #define DWC3_DSTS_FULLSPEED BIT(0) -#define DWC3_DSTS_LOWSPEED (2 << 0) /* Device Generic Command Register */ #define DWC3_DGCMD_SET_LMP 0x01 diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2c94cc9ddd8e..4834ac1cca27 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2113,9 +2113,6 @@ static void __dwc3_gadget_set_speed(struct dwc3 *dwc) reg |= DWC3_DCFG_SUPERSPEED; } else { switch (speed) { - case USB_SPEED_LOW: - reg |= DWC3_DCFG_LOWSPEED; - break; case USB_SPEED_FULL: reg |= DWC3_DCFG_FULLSPEED; break; @@ -3455,11 +3452,6 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) dwc->gadget->ep0->maxpacket = 64; dwc->gadget->speed = USB_SPEED_FULL; break; - case DWC3_DSTS_LOWSPEED: - dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); - dwc->gadget->ep0->maxpacket = 8; - dwc->gadget->speed = USB_SPEED_LOW; - break; } dwc->eps[1]->endpoint.maxpacket = dwc->gadget->ep0->maxpacket; |