From: Vardan Mikayelyan <mvardan@xxxxxxxxxxxx>
Done fixes and tested hsotg gadget's BDMA mode. Tested Control,
Bulk, Isoc, Inter transfers. Added code for isoc transfers,
removed unusable code, done minor fixes. Affected functions
and IRQ handlers:
- dwc2_hsotg_start_req(),
- dwc2_hsotg_ep_enable(),
- dwc2_hsotg_ep_queue(),
- dwc2_hsotg_handle_outdone(),
- GINTSTS_GOUTNAKEFF handler,
Removed 'has_correct_parity' flag from 'dwc2_hsotg_ep' struct.
Before this patch series, to set the data pid the DWC2 gadget
driver was toggling the even/odd until it match, then were
leaving it set. But now I have added mechanism to set pid and
excluded all code where this flag was set.
Signed-off-by: Vardan Mikayelyan <mvardan@xxxxxxxxxxxx>
Signed-off-by: John Youn <johnyoun@xxxxxxxxxxxx>
---
drivers/usb/dwc2/core.h | 1 -
drivers/usb/dwc2/gadget.c | 95 ++++++++++++++++++++++++++++++++++-------------
drivers/usb/dwc2/hw.h | 1 +
3 files changed, 70 insertions(+), 27 deletions(-)
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index f0d20d6..a92533e 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -188,7 +188,6 @@ struct dwc2_hsotg_ep {
unsigned int periodic:1;
unsigned int isochronous:1;
unsigned int send_zlp:1;
- unsigned int has_correct_parity:1;
unsigned int target_frame;
#define TARGET_FRAME_INITIAL 0xFFFFFFFF
unsigned char frame_overrun;
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index d03025c..04cfc94 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -667,6 +667,16 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
__func__, &ureq->dma, dma_reg);
}
+ if (hs_ep->isochronous && hs_ep->interval == 1) {
+ hs_ep->target_frame = dwc2_hsotg_read_frameno(hsotg);
+ dwc2_gadget_incr_frame_num(hs_ep);
+
+ if (hs_ep->target_frame & 0x1)
+ ctrl |= DXEPCTL_SETODDFR;
+ else
+ ctrl |= DXEPCTL_SETEVENFR;
+ }
+
ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */
dev_dbg(hsotg->dev, "ep0 state:%d\n", hsotg->ep0_state);
@@ -863,9 +873,18 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
first = list_empty(&hs_ep->queue);
list_add_tail(&hs_req->queue, &hs_ep->queue);
- if (first)
- dwc2_hsotg_start_req(hs, hs_ep, hs_req, false);
+ if (first) {
+ if (!hs_ep->isochronous) {
+ dwc2_hsotg_start_req(hs, hs_ep, hs_req, false);
+ return 0;
+ }
+ while (dwc2_gadget_target_frame_elapsed(hs_ep))
+ dwc2_gadget_incr_frame_num(hs_ep);
+
+ if (hs_ep->target_frame != TARGET_FRAME_INITIAL)
+ dwc2_hsotg_start_req(hs, hs_ep, hs_req, false);
+ }
return 0;
}
@@ -1673,9 +1692,10 @@ static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum)
* adjust the ISOC parity here.
*/
if (!using_dma(hsotg)) {
- hs_ep->has_correct_parity = 1;
if (hs_ep->isochronous && hs_ep->interval == 1)
dwc2_hsotg_change_ep_iso_parity(hsotg, DOEPCTL(epnum));
+ else if (hs_ep->isochronous && hs_ep->interval > 1)
+ dwc2_gadget_incr_frame_num(hs_ep);
}
dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, result);
@@ -2216,11 +2236,10 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
if (idx == 0 && (ints & (DXEPINT_SETUP | DXEPINT_SETUP_RCVD)))
ints &= ~DXEPINT_XFERCOMPL;
- if (ints & DXEPINT_XFERCOMPL) {
- hs_ep->has_correct_parity = 1;
- if (hs_ep->isochronous && hs_ep->interval == 1)
- dwc2_hsotg_change_ep_iso_parity(hsotg, epctl_reg);
+ if (ints & DXEPINT_STSPHSERCVD)
+ dev_dbg(hsotg->dev, "%s: StsPhseRcvd asserted\n", __func__);
+ if (ints & DXEPINT_XFERCOMPL) {
dev_dbg(hsotg->dev,
"%s: XferCompl: DxEPCTL=0x%08x, DXEPTSIZ=%08x\n",
__func__, dwc2_readl(hsotg->regs + epctl_reg),
@@ -2231,7 +2250,12 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
* at completing IN requests here
*/
if (dir_in) {
+ if (hs_ep->isochronous && hs_ep->interval > 1)
+ dwc2_gadget_incr_frame_num(hs_ep);
+
dwc2_hsotg_complete_in(hsotg, hs_ep);
+ if (ints & DXEPINT_NAKINTRPT)
+ ints &= ~DXEPINT_NAKINTRPT;
if (idx == 0 && !hs_ep->req)
dwc2_hsotg_enqueue_setup(hsotg);
@@ -2240,6 +2264,8 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
* We're using DMA, we need to fire an OutDone here
* as we ignore the RXFIFO.
*/
+ if (hs_ep->isochronous && hs_ep->interval > 1)
+ dwc2_gadget_incr_frame_num(hs_ep);
dwc2_hsotg_handle_outdone(hsotg, idx);
}
@@ -2556,18 +2582,16 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
dwc2_writel(((hsotg->dedicated_fifos && !using_dma(hsotg)) ?
DIEPMSK_TXFIFOEMPTY | DIEPMSK_INTKNTXFEMPMSK : 0) |
DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK |
- DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK |
- DIEPMSK_INTKNEPMISMSK,
+ DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK,
hsotg->regs + DIEPMSK);
/*
* don't need XferCompl, we get that from RXFIFO in slave mode. In
* DMA mode we may need this.
*/
- dwc2_writel((using_dma(hsotg) ? (DIEPMSK_XFERCOMPLMSK |
- DIEPMSK_TIMEOUTMSK) : 0) |
+ dwc2_writel((using_dma(hsotg) ? (DIEPMSK_XFERCOMPLMSK) : 0) |
DOEPMSK_EPDISBLDMSK | DOEPMSK_AHBERRMSK |
- DOEPMSK_SETUPMSK,
+ DOEPMSK_SETUPMSK | DOEPMSK_STSPHSERCVDMSK,
hsotg->regs + DOEPMSK);
dwc2_writel(0, hsotg->regs + DAINTMSK);
@@ -2858,11 +2882,29 @@ irq_retry:
*/
if (gintsts & GINTSTS_GOUTNAKEFF) {
- dev_info(hsotg->dev, "GOUTNakEff triggered\n");
+ u8 idx;
+ u32 epctrl;
+ u32 gintmsk;
+ struct dwc2_hsotg_ep *hs_ep;
- __orr32(hsotg->regs + DCTL, DCTL_CGOUTNAK);
+ /* Mask this interrupt */
+ gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
+ gintmsk &= ~GINTSTS_GOUTNAKEFF;
+ dwc2_writel(gintmsk, hsotg->regs + GINTMSK);
- dwc2_hsotg_dump(hsotg);
+ dev_info(hsotg->dev, "GOUTNakEff triggered\n");
+ for (idx = 1; idx <= hsotg->num_of_eps; idx++) {
+ hs_ep = hsotg->eps_out[idx];
+ epctrl = dwc2_readl(hsotg->regs + DOEPCTL(idx));
+
+ if ((epctrl & DXEPCTL_EPENA) && hs_ep->isochronous) {
+ epctrl |= DXEPCTL_SNAK;
+ epctrl |= DXEPCTL_EPDIS;
+ dwc2_writel(epctrl, hsotg->regs + DOEPCTL(idx));
+ }
+ }
+
+ /* This interrupt bit is cleared in DXEPINT_EPDISBLD handler */
}
if (gintsts & GINTSTS_GINNAKEFF) {
@@ -2909,6 +2951,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
u32 epctrl_reg;
u32 epctrl;
u32 mps;
+ u32 mask;
unsigned int dir_in;
unsigned int i, val, size;
int ret = 0;
@@ -2951,15 +2994,6 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
*/
epctrl |= DXEPCTL_USBACTEP;
- /*
- * set the NAK status on the endpoint, otherwise we might try and
- * do something with data that we've yet got a request to process
- * since the RXFIFO will take data for an endpoint even if the
- * size register hasn't been set.
- */
-
- epctrl |= DXEPCTL_SNAK;
-
/* update the endpoint state */
dwc2_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps, dir_in);
@@ -2975,8 +3009,17 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
epctrl |= DXEPCTL_SETEVENFR;
hs_ep->isochronous = 1;
hs_ep->interval = 1 << (desc->bInterval - 1);
- if (dir_in)
+ hs_ep->target_frame = TARGET_FRAME_INITIAL;
+ if (dir_in) {
hs_ep->periodic = 1;
+ mask = dwc2_readl(hsotg->regs + DIEPMSK);
+ mask |= DIEPMSK_NAKMSK;
+ dwc2_writel(mask, hsotg->regs + DIEPMSK);
+ } else {
+ mask = dwc2_readl(hsotg->regs + DOEPMSK);
+ mask |= DOEPMSK_OUTTKNEPDISMSK;
+ dwc2_writel(mask, hsotg->regs + DOEPMSK);
+ }
break;
case USB_ENDPOINT_XFER_BULK:
@@ -3046,7 +3089,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
}
/* for non control endpoints, set PID to D0 */
- if (index)
+ if (index && !hs_ep->isochronous)
epctrl |= DXEPCTL_SETD0PID;
dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n",
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index 1126141..efc3bcd 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -560,6 +560,7 @@
#define DXEPINT_INEPNAKEFF (1 << 6)
#define DXEPINT_BACK2BACKSETUP (1 << 6)
#define DXEPINT_INTKNEPMIS (1 << 5)
+#define DXEPINT_STSPHSERCVD (1 << 5)
#define DXEPINT_INTKNTXFEMP (1 << 4)
#define DXEPINT_OUTTKNEPDIS (1 << 4)
#define DXEPINT_TIMEOUT (1 << 3)
--
2.8.2
--
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