PIC32 USB device only supports full ping poing mode
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4441 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
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ebbf434021
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@ -116,31 +116,27 @@
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#define PIC32MX_ENDP_BIT(ep) (1 << (ep))
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#define PIC32MX_ENDP_ALLSET 0xffff
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/* Endpoint Definitions */
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/* BDT Table Indexing. The BDT table is addressed in the hardware as
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* follows:
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*
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* Bits 9-31: These come the BDT address bits written into the BDTP3, BDTP2
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* and BDTP1 registers
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* Bits 5-8: The endpoint number
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* Bit 4: Direction
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* Bit 3: PPBI, the ping point buffer index bit.
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* Bits 0-2: Supports 8-byte BDT entries
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*/
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#ifndef CONFIG_PIC32MX_USBDEV_PINGPONG
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# define USB_NEXT_PINGPONG (0)
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# define EP0_OUT_EVEN (0)
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# define EP0_OUT_ODD (0)
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# define EP0_IN_EVEN (1)
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# define EP0_IN_ODD (1)
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# define EP_OUT_EVEN(ep) ((ep) << 1)
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# define EP_OUT_ODD(ep) ((ep) << 1)
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# define EP_IN_EVEN(ep) (((ep) << 1) + 1)
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# define EP_IN_ODD(ep) (((ep) << 1) + 1)
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# define EP(ep,dir,pp) (((ep) << 1) + (dir))
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#else
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# define USB_NEXT_PINGPONG (USB_BDT_DTS)
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# define EP0_OUT_EVEN (0)
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# define EP0_OUT_ODD (1)
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# define EP0_IN_EVEN (2)
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# define EP0_IN_ODD (3)
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# define EP_OUT_EVEN(ep) ((ep) << 2)
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# define EP_OUT_ODD(ep) (((ep) << 2) + 1)
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# define EP_IN_EVEN(ep) (((ep) << 2) + 2)
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# define EP_IN_ODD(ep) (((ep) << 2) + 3)
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# define EP(ep,dir,pp) (((ep) << 2) + ((dir) << 1) + (pp))
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#endif
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#define USB_NEXT_PINGPONG USB_BDT_DTS
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#define EP0_OUT_EVEN (0)
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#define EP0_OUT_ODD (1)
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#define EP0_IN_EVEN (2)
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#define EP0_IN_ODD (3)
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#define EP_OUT_EVEN(ep) ((ep) << 2)
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#define EP_OUT_ODD(ep) (((ep) << 2) + 1)
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#define EP_IN_EVEN(ep) (((ep) << 2) + 2)
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#define EP_IN_ODD(ep) (((ep) << 2) + 3)
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#define EP(ep,dir,pp) (((ep) << 2) + ((dir) << 1) + (pp))
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/* Packet sizes. We us a fixed 64 max packet size for all endpoint types */
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@ -387,9 +383,7 @@ struct pic32mx_usbdev_s
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uint8_t ctrlstate; /* Control EP state (see enum pic32mx_ctrlstate_e) */
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uint8_t selfpowered:1; /* 1: Device is self powered */
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uint8_t rwakeup:1; /* 1: Device supports remote wakeup */
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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uint8_t ep0ready:1; /* EP0 OUT already prepared */
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#endif
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uint16_t epavail; /* Bitset of available endpoints */
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/* The endpoint list */
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@ -534,15 +528,20 @@ static const struct usbdev_ops_s g_devops =
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.pullup = pic32mx_usbpullup,
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};
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/* Buffer Descriptor Table */
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/* Buffer Descriptor Table.
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*
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* The BDT table is addressed in the hardware as follows:
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*
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* Bits 9-31: These come the BDT address bits written into the BDTP3, BDTP2
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* and BDTP1 registers
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* Bits 5-8: The endpoint number
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* Bit 4: Direction
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* Bit 3: PPBI, the ping point buffer index bit.
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* Bits 0-2: Supports 8-byte BDT entries
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*/
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#ifndef CONFIG_PIC32MX_USBDEV_PINGPONG
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volatile struct usbotg_bdtentry_s
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g_bdt[(PIC32MX_NENDPOINTS + 1) * 2] __attribute__ ((aligned(512)));
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#else
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volatile struct usbotg_bdtentry_s
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g_bdt[(PIC32MX_NENDPOINTS + 1) * 4] __attribute__ ((aligned(512)));
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#endif
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/****************************************************************************
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* Public Data
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@ -746,26 +745,10 @@ static void pic32mx_epwrite(struct pic32mx_ep_s *privep, const uint8_t *src,
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usbtrace(TRACE_WRITE(USB_EPNO(privep->ep.eplog)), nbytes);
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/* Clear status and toggle the DTS bit if required */
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/* Clear all bits in the status preserving only the data toggle bit */
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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/* Clear all bits in the status but preserve the data toggle bit */
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status = bdt->status & USB_BDT_DATA01;
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#else
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if (toggle)
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{
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/* Clear all bits in the status but toggle DATA0/1 */
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status = (bdt->status & USB_BDT_DATA01) ^ USB_BDT_DATA01;
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}
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else
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{
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/* Clear all bits in the status but set DATA1 */
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status = USB_BDT_DATA1;
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}
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#endif
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status = bdt->status;
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status &= USB_BDT_DATA01;
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bdt->status = status;
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/* Set the data pointer, data length, and enable the endpoint */
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@ -780,9 +763,7 @@ static void pic32mx_epwrite(struct pic32mx_ep_s *privep, const uint8_t *src,
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/* Point to the next ping pong buffer. */
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_NEXT_PINGPONG;
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#endif
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/* And, finally, give the BDT to the USB */
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@ -1092,12 +1073,6 @@ static int pic32mx_rdsetup(struct pic32mx_usbdev_s *priv,
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status = bdt->status & USB_BDT_DATA01;
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bdt->status = status;
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/* Toggle the DATA01 bit if required for ping pong support */
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#ifndef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_BDT_DATA01;
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#endif
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/* Set the data pointer, data length, and enable the endpoint */
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bdt->addr = (uint8_t *)PHYS_ADDR(dest);
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@ -1108,9 +1083,7 @@ static int pic32mx_rdsetup(struct pic32mx_usbdev_s *priv,
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/* Point to the next ping pong buffer. */
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_NEXT_PINGPONG;
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#endif
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/* Then give the BDT to the USB */
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@ -1335,9 +1308,7 @@ static void pic32mx_ep0nextsetup(struct pic32mx_usbdev_s *priv)
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status = bdt->status & ~USB_BDT_UOWN;
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_NEXT_PINGPONG;
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#endif
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status &= ~USB_BDT_UOWN;
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bdtdbg("EP0 BDT IN {%08x, %08x}\n", status, bdt->addr);
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@ -1354,15 +1325,12 @@ static void pic32mx_ep0done(struct pic32mx_usbdev_s *priv,
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{
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struct pic32mx_ep_s *ep0 = &priv->eplist[EP0];
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volatile struct usbotg_bdtentry_s *bdtout;
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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volatile struct usbotg_bdtentry_s *bdtnext;
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#endif
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uint16_t status;
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/* Which BDT are we working on new? Which one will be next */
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bdtout = ep0->bdtout;
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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if (bdtout == &g_bdt[EP0_OUT_EVEN])
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{
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bdtnext = &g_bdt[EP0_OUT_ODD];
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@ -1372,7 +1340,6 @@ static void pic32mx_ep0done(struct pic32mx_usbdev_s *priv,
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DEBUGASSERT(bdtout == &g_bdt[EP0_OUT_ODD]);
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bdtnext = &g_bdt[EP0_OUT_EVEN];
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}
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#endif
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/* Prepare OUT EP to respond to early termination NOTE: If
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* something went wrong during the control transfer, the last
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@ -1403,7 +1370,6 @@ static void pic32mx_ep0done(struct pic32mx_usbdev_s *priv,
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* other buffer.
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*/
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status = bdtnext->status;
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status &= ~USB_BDT_BYTECOUNT_MASK;
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status |= (USB_SIZEOF_CTRLREQ << USB_BDT_BYTECOUNT_SHIFT);
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@ -1415,7 +1381,6 @@ static void pic32mx_ep0done(struct pic32mx_usbdev_s *priv,
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bdtnext->status = status;
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priv->ep0ready = 1;
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#endif
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}
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/****************************************************************************
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@ -1997,9 +1962,7 @@ static void pic32mx_ep0in(struct pic32mx_usbdev_s *priv)
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/* Switch to the next ping pong buffer */
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status = bdt->status;
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_NEXT_PINGPONG;
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#endif
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/* Are we processing the completion of one packet of an outgoing request
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* from the class driver?
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@ -2134,9 +2097,7 @@ static void pic32mx_ep0out(struct pic32mx_usbdev_s *priv)
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pic32mx_ep0nextsetup(priv);
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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if (!priv->ep0ready)
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#endif
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{
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status = ep0->bdtout->status;
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status &= ~(USB_BDT_BSTALL | USB_BDT_NINC | USB_BDT_KEEP |
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@ -2154,9 +2115,7 @@ static void pic32mx_ep0out(struct pic32mx_usbdev_s *priv)
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ep0->bdtout->status = status;
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}
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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priv->ep0ready = 0;
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#endif
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}
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break;
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@ -2196,17 +2155,13 @@ static void pic32mx_ep0transfer(struct pic32mx_usbdev_s *priv, uint16_t status)
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/* It was an EP0 OUT transaction. Get the index to the BDT. */
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#if CONFIG_PIC32MX_USBDEV_PINGPONG
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index = ((status & USB_STAT_PPBI) == 0 ? EP0_OUT_EVEN : EP0_OUT_ODD);
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#else
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index = EP0_OUT_EVEN;
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#endif
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bdt = &g_bdt[index];
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priv->eplist[0].bdtout = bdt;
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bdtdbg("EP0 BDT OUT {%08x, %08x}\n", bdt->status, bdt->addr);
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/* Toggle it to the next ping pong buffer (if applicable) */
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/* Toggle it to the next ping pong buffer */
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bdt->status ^= USB_NEXT_PINGPONG;
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@ -2771,11 +2726,10 @@ static int pic32mx_epconfigure(struct usbdev_ep_s *ep,
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bdtdbg("EP%d BDT IN {%08x, %08x}\n", epno, status, bdt->addr);
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/* Now do the same for the other buffer (if ping pong mode is supported).
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* The only difference is the we clear DATA1 (making it DATA0)
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/* Now do the same for the other buffer. The only difference is the
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* we clear DATA1 (making it DATA0)
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*/
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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bdt = &g_bdt[index+1];
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status = bdt->status & ~USB_BDT_UOWN;
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@ -2783,7 +2737,6 @@ static int pic32mx_epconfigure(struct usbdev_ep_s *ep,
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bdt->status = status;
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bdtdbg("EP%d BDT IN {%08x, %08x}\n", epno, status, bdt->addr);
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#endif
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}
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if (!epin || bidi)
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@ -2809,7 +2762,6 @@ static int pic32mx_epconfigure(struct usbdev_ep_s *ep,
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* The only difference is the we clear DATA1 (making it DATA0)
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*/
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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bdt = &g_bdt[index+1];
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status = bdt->status & ~USB_BDT_UOWN;
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@ -2817,7 +2769,6 @@ static int pic32mx_epconfigure(struct usbdev_ep_s *ep,
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bdt->status = status;
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bdtdbg("EP%d BDT OUT {%08x, %08x}\n", epno, status, bdt->addr);
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#endif
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}
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/* Get the maxpacket size of the endpoint. */
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@ -2876,14 +2827,10 @@ static int pic32mx_epdisable(struct usbdev_ep_s *ep)
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pic32mx_putreg(0, PIC32MX_USB_EP(epno));
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/* Reset the BDTs */
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/* Reset the BDTs for the endpoint. Four BDT entries per endpoint. */
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ptr = (uint32_t*)&g_bdt[EP(epno, 0, 0)];
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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for (i = 0; i < (4 * sizeof(struct usbotg_bdtentry_s) / sizeof(uint32_t)); i++)
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#else
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for (i = 0; i < (2 * sizeof(struct usbotg_bdtentry_s) / sizeof(uint32_t)); i++)
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#endif
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{
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*ptr++ = 0;
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}
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@ -3105,9 +3052,7 @@ static int pic32mx_epbdtstall(struct usbdev_ep_s *ep,
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/* Toggle over the to the next buffer */
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_NEXT_PINGPONG;
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#endif
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status |= (USB_BDT_UOWN | USB_BDT_DATA1);
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/* Then give the BDT to the USB */
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@ -3133,9 +3078,7 @@ static int pic32mx_epbdtstall(struct usbdev_ep_s *ep,
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/* Toggle over the to the next buffer */
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#ifdef CONFIG_PIC32MX_USBDEV_PINGPONG
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status ^= USB_NEXT_PINGPONG;
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#endif
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status |= (USB_BDT_UOWN | USB_BDT_DATA1 | USB_BDT_DTS);
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/* Then give the BDT to the USB */
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@ -3605,10 +3548,10 @@ static void pic32mx_hwreset(struct pic32mx_usbdev_s *priv)
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* BDTP3: Bit 0-7: Bits 24-31 of the BDT base address
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*/
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physaddr = (PHYS_ADDR(g_bdt)) >> 8;
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pic32mx_putreg((uint16_t)((regval >> 8) & USB_BDTP1_MASK), PIC32MX_USB_BDTP1);
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pic32mx_putreg((uint16_t)((regval >> 16) & USB_BDTP2_MASK), PIC32MX_USB_BDTP2);
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pic32mx_putreg((uint16_t)((regval >> 24) & USB_BDTP3_MASK), PIC32MX_USB_BDTP3);
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physaddr = PHYS_ADDR(g_bdt);
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pic32mx_putreg((uint16_t)((physaddr >> 8) & USB_BDTP1_MASK), PIC32MX_USB_BDTP1);
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pic32mx_putreg((uint16_t)((physaddr >> 16) & USB_BDTP2_MASK), PIC32MX_USB_BDTP2);
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pic32mx_putreg((uint16_t)((physaddr >> 24) & USB_BDTP3_MASK), PIC32MX_USB_BDTP3);
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/* Assert reset request to all of the Ping Pong buffer pointers */
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@ -230,7 +230,6 @@ CONFIG_UART2_2STOP=0
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#
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CONFIG_PIC32MX_USBDEV_REGDEBUG=n
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CONFIG_PIC32MX_USBDEV_BDTDEBUG=n
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CONFIG_PIC32MX_USBDEV_PINGPONG=n
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#
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# General build options
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