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Add support for lowspeed devices

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3244 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-01-12 04:03:27 +00:00
parent fa8015b26e
commit 40471f14d2
1 changed files with 36 additions and 2 deletions
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38
arch/arm/src/lpc17xx/lpc17_usbhost.c
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@ -156,6 +156,7 @@ struct lpc17_usbhost_s
volatile uint8_t tdstatus; /* TD control status bits from last Writeback Done Head event */
volatile bool connected; /* Connected to device */
volatile bool lowspeed; /* Low speed device attached. */
volatile bool rhswait; /* TRUE: Thread is waiting for Root Hub Status change */
volatile bool wdhwait; /* TRUE: Thread is waiting for WDH interrupt */
sem_t rhssem; /* Semaphore to wait Writeback Done Head event */
@ -739,10 +740,12 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
else
{
/* Check if we are now connected */
/* Check current connect status */
if ((rhportst1 & OHCI_RHPORTST_CCS) != 0)
{
/* Connected ... Did we just become connected? */
if (!priv->connected)
{
/* Yes.. connected. */
@ -763,6 +766,13 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
{
ulldbg("Spurious status change (connected)\n");
}
/* The LSDA (Low speed device attached) bit is valid
* when CCS == 1.
*/
priv->lowspeed = (rhportst1 & OHCI_RHPORTST_LSDA) != 0;
ullvdbg("Speed:%s\n", priv->lowspeed ? "LOW" : "FULL");
}
/* Check if we are now disconnected */
@ -773,6 +783,7 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
ullvdbg("Disconnected\n");
priv->connected = false;
priv->lowspeed = false;
/* Are we bound to a class instance? */
@ -1028,9 +1039,19 @@ static int lpc17_enumerate(FAR struct usbhost_driver_s *drvr)
static int lpc17_ep0configure(FAR struct usbhost_driver_s *drvr, uint8_t funcaddr,
uint16_t maxpacketsize)
{
struct lpc17_usbhost_s *priv = (struct lpc17_usbhost_s *)drvr;
DEBUGASSERT(drvr && funcaddr < 128 && maxpacketsize < 2048);
EDCTRL->ctrl = (uint32_t)funcaddr << ED_CONTROL_FA_SHIFT |
(uint32_t)maxpacketsize << ED_CONTROL_MPS_SHIFT;
if (priv->lowspeed)
{
EDCTRL->ctrl |= ED_CONTROL_S;
}
uvdbg("EP0 CTRL:%08x\n", EDCTRL->ctrl);
return OK;
}
@ -1059,10 +1080,15 @@ static int lpc17_ep0configure(FAR struct usbhost_driver_s *drvr, uint8_t funcadd
static int lpc17_epalloc(FAR struct usbhost_driver_s *drvr,
const FAR struct usbhost_epdesc_s *epdesc, usbhost_ep_t *ep)
{
struct lpc17_usbhost_s *priv = (struct lpc17_usbhost_s *)drvr;
struct ohci_ed_s *ed;
int ret = -ENOMEM;
DEBUGASSERT(epdesc && ep);
/* Sanity check. NOTE that this method should only be called if a device is
* connected (because we need a valid low speed indication).
*/
DEBUGASSERT(priv && epdesc && ep && priv->connected);
/* Take the next ED from the beginning of the free list */
@ -1091,6 +1117,14 @@ static int lpc17_epalloc(FAR struct usbhost_driver_s *drvr,
ed->ctrl |= ED_CONTROL_D_OUT;
}
/* Check for a low-speed device */
if (priv->lowspeed)
{
ed->ctrl |= ED_CONTROL_S;
}
uvdbg("EP%d CTRL:%08x\n", epdesc->addr, ed->ctrl);
/* Return an opaque reference to the ED */
*ep = (usbhost_ep_t)ed;