sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fix some PIC32 USB IN transfer issues -- still more

Browse Source 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4453 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-03-04 22:31:18 +00:00
parent d1c6ef19cc
commit 9c1f5ce657
1 changed files with 66 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

138
arch/mips/src/pic32mx/pic32mx-usbdev.c
View File

@ -366,6 +366,7 @@ struct pic32mx_ep_s
uint8_t halted:1; /* true: Endpoint feature halted */
uint8_t txbusy:1; /* true: TX endpoint FIFO full */
uint8_t txnullpkt:1; /* Null packet needed at end of TX transfer */
uint8_t txdata1:1; /* Data0/1 of next TX transfer */
uint8_t rxdata1:1; /* Data0/1 of next RX transfer */
volatile struct usbotg_bdtentry_s *bdtin; /* BDT entry for the IN transaction*/
volatile struct usbotg_bdtentry_s *bdtout; /* BDT entry for the OUT transaction */
@ -757,30 +758,30 @@ static void pic32mx_epwrite(struct pic32mx_ep_s *privep, const uint8_t *src,
usbtrace(TRACE_WRITE(USB_EPNO(privep->ep.eplog)), nbytes);
/* Clear all bits in the status preserving only the data toggle bit */
/* Clear all bits in the status (assuring that we own the BDT) */
status = bdt->status;
status &= USB_BDT_DATA01;
bdt->status = 0;
/* Toggle the data toggle */
/* Get the correct data toggle (as well as other BDT bits) */
status ^= USB_BDT_DATA01;
bdt->status = status;
if (privep->txdata1)
{
status = (USB_BDT_UOWN | USB_BDT_DATA1 | USB_BDT_DTS);
privep->txdata1 = 0;
}
else
{
status = (USB_BDT_UOWN | USB_BDT_DATA0 | USB_BDT_DTS);
privep->txdata1 = 1;
}
/* Set the data pointer, data length, and enable the endpoint */
/* Set the data pointer and data length */
bdt->addr = (uint8_t *)PHYS_ADDR(src);
/* Set the data length and give the BDT to USB. Preserving
* only the data toggle.
*/
status |= (nbytes << USB_BDT_BYTECOUNT_SHIFT) | USB_BDT_DTS;
status |= (nbytes << USB_BDT_BYTECOUNT_SHIFT) | USB_BDT_DTS;
/* And, finally, give the BDT to the USB */
status |= USB_BDT_UOWN;
bdtdbg("EP%d BDT IN [%p] {%08x, %08x}\n",
USB_EPNO(privep->ep.eplog), bdt, status, bdt->addr);
@ -1220,7 +1221,7 @@ static int pic32mx_rdsetup(struct pic32mx_ep_s *privep, uint8_t *dest, int readl
usbtrace(TRACE_READ(USB_EPNO(privep->ep.eplog)), readlen);
/* Clear status bits (making sure that UOWN is cleared before doing anything
* else). The DATA01 is (only) is preserved.
* else).
*/
bdtout->status = 0;
@ -1501,6 +1502,7 @@ static void pic32mx_ep0nextsetup(struct pic32mx_usbdev_s *priv)
static void pic32mx_ep0rdcomplete(struct pic32mx_usbdev_s *priv)
{
volatile struct usbotg_bdtentry_s *bdt;
struct pic32mx_ep_s *ep0;
uint32_t physaddr;
uint32_t bytecount;
@ -1524,6 +1526,14 @@ static void pic32mx_ep0rdcomplete(struct pic32mx_usbdev_s *priv)
bdt->status = (USB_BDT_UOWN | bytecount);
priv->ep0done = 1;
/* Data toggling is not used on SETUP transfers. And IN transfer
* resulting from a SETUP command should begin with DATA1.
*/
ep0 = &priv->eplist[EP0];
ep0->rxdata1 = 0;
ep0->txdata1 = 1;
}
}
@ -1577,10 +1587,15 @@ static void pic32mx_ep0setup(struct pic32mx_usbdev_s *priv)
ep0->bdtin->status &= ~USB_BDT_UOWN;
}
/* Assume NOT stalled; no TX in progress; no RX overrun */
/* Assume NOT stalled; no TX in progress; no RX overrun. Data 0/1 toggling
* is not used on SETUP packets, but any following EP0 IN transfer should
* beginning with DATA1.
*/
ep0->stalled = false;
ep0->txbusy = false;
ep0->rxdata1 = 0;
ep0->txdata1 = 1;
/* Initialize for the SETUP */
@ -2073,7 +2088,9 @@ resume_packet_processing:
* In either case, we handle the stall condition the same.
*
* However, bad things happen if we try to stall a SETUP packet. So lets
* not. If we wait a bit, things will recover.
* not. If we wait a bit, things will recover. Hmmm.. If we completed
* the data phase (perhaps by sending a NULL packet), then I think we
* could stall the endpoint and perhaps speed things up a bit???.
*/
/* Set up the BDT to accept the next setup commend. */
@ -2091,20 +2108,14 @@ static void pic32mx_ep0incomplete(struct pic32mx_usbdev_s *priv)
struct pic32mx_ep_s *ep0 = &priv->eplist[EP0];
volatile struct usbotg_bdtentry_s *bdtlast;
volatile struct usbotg_bdtentry_s *bdtnext;
uint32_t data01;
int ret;
/* An EP0 OUT transfer has just completed */
ep0->txbusy = false;
/* Get the last IN BDT and its data toggle */
bdtlast = ep0->bdtin;
data01 = (bdtlast->status & USB_BDT_DATA01);
/* Get the next BDT */
/* Get the last and the next IN BDT */
bdtlast = ep0->bdtin;
if (bdtlast == &g_bdt[EP0_IN_EVEN])
{
bdtnext = &g_bdt[EP0_IN_ODD];
@ -2115,17 +2126,12 @@ static void pic32mx_ep0incomplete(struct pic32mx_usbdev_s *priv)
bdtnext = &g_bdt[EP0_IN_EVEN];
}
/* Make sure that we own the last BDT. */
/* Make sure that we own the last BDTs. */
bdtlast->status = (USB_BDT_DATA0 | USB_BDT_DTS | USB_BDT_BSTALL);
bdtlast->addr = 0;
bdtlast->status = 0;
bdtlast->addr = 0;
/* Setup the next BDT with the same data toggle (We own this one too) */
bdtnext->status = (data01 | USB_BDT_DTS | USB_BDT_BSTALL);
bdtnext->addr = 0;
/* Save the next BDT */
/* Save the next BDT as the current BDT */
ep0->bdtin = bdtnext;
@ -2145,20 +2151,7 @@ static void pic32mx_ep0incomplete(struct pic32mx_usbdev_s *priv)
* transfers, pic32mx_wrrequest will set ctrlstate = CTRLSTATE_WAITSETUP
*/
ret = pic32mx_wrrequest(priv, &priv->eplist[EP0]);
if (ret == OK)
{
/* Is there another IN transfer in-flight? */
if (priv->ctrlstate == CTRLSTATE_WAITSETUP)
{
/* Set DATA1 to one in the next BDT because the first thing
* we will do when transmitting is toggle the bit
*/
bdtnext->status &= ~USB_BDT_DATA01;
}
}
(void)pic32mx_wrrequest(priv, &priv->eplist[EP0]);
}
/* No.. Are we processing the completion of a status response? */
@ -2192,12 +2185,6 @@ static void pic32mx_ep0incomplete(struct pic32mx_usbdev_s *priv)
priv->devstate = DEVSTATE_DEFAULT;
}
}
/* Clear DATA1 to one in the next BDT because the first thing we will
* do when transmitting is toggle the bit
*/
bdtnext->status &= ~USB_BDT_DATA01;
}
/* No other state is expected in this context */
@ -2766,6 +2753,7 @@ pic32mx_epreserved(struct pic32mx_usbdev_s *priv, int epno)
static void pic32mx_ep0configure(struct pic32mx_usbdev_s *priv)
{
volatile struct usbotg_bdtentry_s *bdt;
struct pic32mx_ep_s *ep0;
uint32_t bytecount;
/* Enable the EP0 endpoint */
@ -2777,27 +2765,35 @@ static void pic32mx_ep0configure(struct pic32mx_usbdev_s *priv)
* toggle synchronization is not needed for SETUP packets.
*/
bytecount = (USB_SIZEOF_CTRLREQ << USB_BDT_BYTECOUNT_SHIFT);
ep0 = &priv->eplist[EP0];
bytecount = (USB_SIZEOF_CTRLREQ << USB_BDT_BYTECOUNT_SHIFT);
bdt = &g_bdt[EP0_OUT_EVEN];
bdt->addr = (uint8_t *)PHYS_ADDR(&priv->ctrl);
bdt->status = (USB_BDT_UOWN | bytecount);
priv->eplist[EP0].bdtout = bdt;
bdt = &g_bdt[EP0_OUT_EVEN];
bdt->addr = (uint8_t *)PHYS_ADDR(&priv->ctrl);
bdt->status = (USB_BDT_UOWN | bytecount);
ep0->bdtout = bdt;
bdt++;
bdt->status = (USB_BDT_UOWN | bytecount);
bdt->addr = (uint8_t *)PHYS_ADDR(&priv->ctrl);
bdt->status = (USB_BDT_UOWN | bytecount);
bdt->addr = (uint8_t *)PHYS_ADDR(&priv->ctrl);
/* Configure the IN BDTs. */
bdt = &g_bdt[EP0_IN_EVEN];
bdt->status = 0;
bdt->addr = 0;
priv->eplist[EP0].bdtin = bdt;
bdt = &g_bdt[EP0_IN_EVEN];
bdt->status = 0;
bdt->addr = 0;
ep0->bdtin = bdt;
bdt++;
bdt->status = 0;
bdt->addr = 0;
bdt->status = 0;
bdt->addr = 0;
/* Data toggling is not used on SETUP transfers. And IN transfer resulting
* from a SETUP command should begin with DATA1.
*/
ep0->rxdata1 = 0;
ep0->txdata1 = 1;
}
/****************************************************************************
@ -3203,7 +3199,7 @@ static int pic32mx_epbdtstall(struct usbdev_ep_s *ep,
*/
status = bdt->status;
status |= (USB_BDT_UOWN | USB_BDT_DATA1);
status |= USB_BDT_UOWN;
/* Then give the BDT to the USB */
@ -3219,12 +3215,10 @@ static int pic32mx_epbdtstall(struct usbdev_ep_s *ep,
/* If the endpoint was an OUT endpoint then we need to give
* control of the endpoint back to the USB so that the
* function driver can receive the data as they expected.
* Also need to set the DTS bit so the next packet will be
* correct.
*/
status = bdt->status;
status |= (USB_BDT_UOWN | USB_BDT_DATA1 | USB_BDT_DTS);
status |= USB_BDT_UOWN;
/* Then give the BDT to the USB */