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authorVardan Mikayelyan <mvardan@synopsys.com>2016-11-14 19:17:03 -0800
committerFelipe Balbi <felipe.balbi@linux.intel.com>2016-11-18 13:54:50 +0200
commit38e9002b85672352f8693c82192c8029586dd86d (patch)
tree115f261b377c5a6aaadeac62167df603d1cb7f0f /drivers/usb/dwc2/gadget.c
parent552d940f0bea0c010615b45ed7c64e7b3b103e6a (diff)
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usb: dwc2: gadget: Add new core parameter for low speed
Added new core param for low speed, which can be used only when SNPSID is equal to DWC2_CORE_FS_IOT. When LS mode is enabled, we are restricting ep types and providing to upper layer only INTR and CTRL endpoints. Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com> Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/gadget.c')
-rw-r--r--drivers/usb/dwc2/gadget.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index e67283237fd4..ad0cd0e38f06 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3175,7 +3175,8 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
GUSBCFG_HNPCAP);
if (hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS &&
- hsotg->params.speed == DWC2_SPEED_PARAM_FULL) {
+ (hsotg->params.speed == DWC2_SPEED_PARAM_FULL ||
+ hsotg->params.speed == DWC2_SPEED_PARAM_LOW)) {
/* FS/LS Dedicated Transceiver Interface */
usbcfg |= GUSBCFG_PHYSEL;
} else {
@@ -3192,14 +3193,21 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
__orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
dcfg |= DCFG_EPMISCNT(1);
- if (hsotg->params.speed == DWC2_SPEED_PARAM_FULL) {
+
+ switch (hsotg->params.speed) {
+ case DWC2_SPEED_PARAM_LOW:
+ dcfg |= DCFG_DEVSPD_LS;
+ break;
+ case DWC2_SPEED_PARAM_FULL:
if (hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS)
dcfg |= DCFG_DEVSPD_FS48;
else
dcfg |= DCFG_DEVSPD_FS;
- } else {
+ break;
+ default:
dcfg |= DCFG_DEVSPD_HS;
}
+
dwc2_writel(dcfg, hsotg->regs + DCFG);
/* Clear any pending OTG interrupts */
@@ -4388,14 +4396,21 @@ static void dwc2_hsotg_initep(struct dwc2_hsotg *hsotg,
hs_ep->parent = hsotg;
hs_ep->ep.name = hs_ep->name;
- usb_ep_set_maxpacket_limit(&hs_ep->ep, epnum ? 1024 : EP0_MPS_LIMIT);
+
+ if (hsotg->params.speed == DWC2_SPEED_PARAM_LOW)
+ usb_ep_set_maxpacket_limit(&hs_ep->ep, 8);
+ else
+ usb_ep_set_maxpacket_limit(&hs_ep->ep,
+ epnum ? 1024 : EP0_MPS_LIMIT);
hs_ep->ep.ops = &dwc2_hsotg_ep_ops;
if (epnum == 0) {
hs_ep->ep.caps.type_control = true;
} else {
- hs_ep->ep.caps.type_iso = true;
- hs_ep->ep.caps.type_bulk = true;
+ if (hsotg->params.speed != DWC2_SPEED_PARAM_LOW) {
+ hs_ep->ep.caps.type_iso = true;
+ hs_ep->ep.caps.type_bulk = true;
+ }
hs_ep->ep.caps.type_int = true;
}