Experimental isochronous capability added to STM32 OTGv1 driver.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8289 35acf78f-673a-0410-8e92-d51de3d6d3f4

2 files changed, 98 insertions, 4 deletions

diff --git a/os/hal/ports/STM32/LLD/OTGv1/stm32_otg.h b/os/hal/ports/STM32/LLD/OTGv1/stm32_otg.h
index 60f1d25ab..e64038f21 100644
--- a/os/hal/ports/STM32/LLD/OTGv1/stm32_otg.h
+++ b/os/hal/ports/STM32/LLD/OTGv1/stm32_otg.h
@@ -678,6 +678,8 @@ typedef struct {
                                                  SOF mask.                  */

 #define DSTS_FNSOF(n)           ((n)<<8)    /**< Frame number of the received

                                                  SOF value.                 */

+#define DSTS_FNSOF_ODD          (1U<<8)     /**< Frame parity of the received

+                                                 SOF value.                 */

 #define DSTS_EERR               (1U<<3)     /**< Erratic error.             */

 #define DSTS_ENUMSPD_MASK       (3U<<1)     /**< Enumerated speed mask.     */

 #define DSTS_ENUMSPD_FS_48      (3U<<1)     /**< Full speed (PHY clock is

diff --git a/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c b/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c
index 6d8e01538..6d94f2e07 100644
--- a/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c
+++ b/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c
@@ -563,6 +563,69 @@ static void otg_epout_handler(USBDriver *usbp, usbep_t ep) {
 }

 

 /**

+ * @brief   Isochronous IN transfer failed handler.

+ *

+ * @param[in] usbp      pointer to the @p USBDriver object

+ *

+ * @notapi

+ */

+static void otg_isoc_in_failed_handler(USBDriver *usbp) {

+  usbep_t ep;

+  stm32_otg_t *otgp = usbp->otg;

+

+  for (ep = 0; ep <= usbp->otgparams->num_endpoints; ep++) {

+    if (((otgp->ie[ep].DIEPCTL & DIEPCTL_EPTYP_MASK) == DIEPCTL_EPTYP_ISO) &&

+        ((otgp->ie[ep].DIEPCTL & DIEPCTL_EPENA) != 0)) {

+      /* Endpoint enabled -> ISOC IN transfer failed */

+      /* Disable endpoint */

+      otgp->ie[ep].DIEPCTL |= (DIEPCTL_EPDIS | DIEPCTL_SNAK);

+      while (otgp->ie[ep].DIEPCTL & DIEPCTL_EPENA)

+        ;

+

+      /* Flush FIFO */

+      otg_txfifo_flush(usbp, ep);

+

+      /* Prepare data for next frame */

+      _usb_isr_invoke_in_cb(usbp, ep);

+

+      /* Pump out data for next frame */

+      osalSysLockFromISR();

+      otgp->DIEPEMPMSK &= ~(1 << ep);

+      usbp->txpending |= (1 << ep);

+      osalThreadResumeI(&usbp->wait, MSG_OK);

+      osalSysUnlockFromISR();

+    }

+  }

+}

+

+/**

+ * @brief   Isochronous OUT transfer failed handler.

+ *

+ * @param[in] usbp      pointer to the @p USBDriver object

+ *

+ * @notapi

+ */

+

+static void otg_isoc_out_failed_handler(USBDriver *usbp) {

+  usbep_t ep;

+  stm32_otg_t *otgp = usbp->otg;

+

+  for (ep = 0; ep <= usbp->otgparams->num_endpoints; ep++) {

+    if (((otgp->oe[ep].DOEPCTL & DOEPCTL_EPTYP_MASK) == DOEPCTL_EPTYP_ISO) &&

+        ((otgp->oe[ep].DOEPCTL & DOEPCTL_EPENA) != 0)) {

+      /* Endpoint enabled -> ISOC OUT transfer failed */

+      /* Disable endpoint */

+      /* FIXME: Core stucks here */

+      /*otgp->oe[ep].DOEPCTL |= (DOEPCTL_EPDIS | DOEPCTL_SNAK);

+      while (otgp->oe[ep].DOEPCTL & DOEPCTL_EPENA)

+        ;*/

+      /* Prepare transfer for next frame */

+      _usb_isr_invoke_out_cb(usbp, ep);

+    }

+  }

+}

+

+/**

  * @brief   OTG shared ISR.

  *

  * @param[in] usbp      pointer to the @p USBDriver object

@@ -622,6 +685,16 @@ static void usb_lld_serve_interrupt(USBDriver *usbp) {
     _usb_isr_invoke_sof_cb(usbp);

   }

 

+  /* Isochronous IN failed handling */

+  if (sts & GINTSTS_IISOIXFR) {

+    otg_isoc_in_failed_handler(usbp);

+  }

+

+  /* Isochronous OUT failed handling */

+  if (sts & GINTSTS_IISOOXFR) {

+    otg_isoc_out_failed_handler(usbp);

+  }

+

   /* RX FIFO not empty handling.*/

   if (sts & GINTSTS_RXFLVL) {

     /* The interrupt is masked while the thread has control or it would

@@ -830,7 +903,7 @@ void usb_lld_start(USBDriver *usbp) {
          - USB turn-around time = TRDT_VALUE_HS or TRDT_VALUE_FS.*/

 #if defined(BOARD_OTG2_USES_ULPI)

       /* High speed ULPI PHY.*/

-      otgp->GUSBCFG = GUSBCFG_FDMOD | GUSBCFG_TRDT(TRDT_VALUE_HS) | /*XXXXXXXXXXX*/

+      otgp->GUSBCFG = GUSBCFG_FDMOD | GUSBCFG_TRDT(TRDT_VALUE_HS) |

                       GUSBCFG_SRPCAP | GUSBCFG_HNPCAP;

 #else

       otgp->GUSBCFG = GUSBCFG_FDMOD | GUSBCFG_TRDT(TRDT_VALUE_FS) |

@@ -893,10 +966,12 @@ void usb_lld_start(USBDriver *usbp) {
     otgp->DAINTMSK = 0;

     if (usbp->config->sof_cb == NULL)

       otgp->GINTMSK  = GINTMSK_ENUMDNEM | GINTMSK_USBRSTM | GINTMSK_USBSUSPM |

-                       GINTMSK_ESUSPM | GINTMSK_SRQM | GINTMSK_WKUM;

+                       GINTMSK_ESUSPM | GINTMSK_SRQM | GINTMSK_WKUM |

+                       GINTMSK_IISOIXFRM | GINTMSK_IISOOXFRM;

     else

       otgp->GINTMSK  = GINTMSK_ENUMDNEM | GINTMSK_USBRSTM | GINTMSK_USBSUSPM |

                        GINTMSK_ESUSPM | GINTMSK_SRQM | GINTMSK_WKUM |

+                       GINTMSK_IISOIXFRM | GINTMSK_IISOOXFRM |

                        GINTMSK_SOFM;

 

     /* Clears all pending IRQs, if any. */

@@ -1225,7 +1300,8 @@ void usb_lld_prepare_transmit(USBDriver *usbp, usbep_t ep) {
     /* Normal case.*/

     uint32_t pcnt = (isp->txsize + usbp->epc[ep]->in_maxsize - 1) /

                     usbp->epc[ep]->in_maxsize;

-    usbp->otg->ie[ep].DIEPTSIZ = DIEPTSIZ_PKTCNT(pcnt) |

+    /* TODO: Support more than one packet per frame for isochronous transfers.*/

+    usbp->otg->ie[ep].DIEPTSIZ = DIEPTSIZ_MCNT(1) | DIEPTSIZ_PKTCNT(pcnt) |

                                  DIEPTSIZ_XFRSIZ(isp->txsize);

   }

 }

@@ -1240,7 +1316,15 @@ void usb_lld_prepare_transmit(USBDriver *usbp, usbep_t ep) {
  */

 void usb_lld_start_out(USBDriver *usbp, usbep_t ep) {

 

-  usbp->otg->oe[ep].DOEPCTL |= DOEPCTL_CNAK;

+  if ((usbp->epc[ep]->ep_mode & USB_EP_MODE_TYPE) == USB_EP_MODE_TYPE_ISOC) {

+    /* Odd/even bit toggling for isochronous endpoint.*/

+    if (usbp->otg->DSTS & DSTS_FNSOF_ODD)

+      usbp->otg->oe[ep].DOEPCTL |= DOEPCTL_SEVNFRM;

+    else

+      usbp->otg->oe[ep].DOEPCTL |= DOEPCTL_SODDFRM;

+  }

+

+  usbp->otg->oe[ep].DOEPCTL |= DOEPCTL_EPENA | DOEPCTL_CNAK;

 }

 

 /**

@@ -1253,6 +1337,14 @@ void usb_lld_start_out(USBDriver *usbp, usbep_t ep) {
  */

 void usb_lld_start_in(USBDriver *usbp, usbep_t ep) {

 

+  if ((usbp->epc[ep]->ep_mode & USB_EP_MODE_TYPE) == USB_EP_MODE_TYPE_ISOC) {

+    /* Odd/even bit toggling.*/

+    if (usbp->otg->DSTS & DSTS_FNSOF_ODD)

+      usbp->otg->ie[ep].DIEPCTL |= DIEPCTL_SEVNFRM;

+    else

+      usbp->otg->ie[ep].DIEPCTL |= DIEPCTL_SODDFRM;

+  }

+

   usbp->otg->ie[ep].DIEPCTL |= DIEPCTL_EPENA | DIEPCTL_CNAK;

   usbp->otg->DIEPEMPMSK |= DIEPEMPMSK_INEPTXFEM(ep);

 }