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Handle case where USB device inserted at power up

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3230 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-01-01 20:57:50 +00:00
parent 7b3f0baf8f
commit fd1139cef9
1 changed files with 39 additions and 19 deletions
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58
arch/arm/src/lpc17xx/lpc17_usbhost.c
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@ -218,7 +218,7 @@ 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);
static int lpc17_alloc(FAR struct usbhost_driver_s *drvr,
FAR uint8_t **buffer, FAR size_t *maxlen);
FAR uint8_t **buffer, FAR size_t *maxlen);
static int lpc17_free(FAR struct usbhost_driver_s *drvr, FAR uint8_t *buffer);
static int lpc17_ctrlin(FAR struct usbhost_driver_s *drvr,
FAR const struct usb_ctrlreq_s *req,
@ -227,8 +227,8 @@ static int lpc17_ctrlout(FAR struct usbhost_driver_s *drvr,
FAR const struct usb_ctrlreq_s *req,
FAR const uint8_t *buffer);
static int lpc17_transfer(FAR struct usbhost_driver_s *drvr,
FAR struct usbhost_epdesc_s *ed,
FAR uint8_t *buffer, size_t buflen);
FAR struct usbhost_epdesc_s *ed,
FAR uint8_t *buffer, size_t buflen);
static void lpc17_disconnect(FAR struct usbhost_driver_s *drvr);
/* Initializaion ***************************************************************/
@ -677,24 +677,22 @@ static int lpc17_ctrltd(struct lpc17_usbhost_s *priv, uint32_t dirpid,
static int lpc17_usbinterrupt(int irq, FAR void *context)
{
struct lpc17_usbhost_s *priv = &g_usbhost;
/* Read the device interrupt status register */
uint32_t intstatus;
uint32_t intenable;
uint32_t intst;
uint32_t pending;
uint32_t regval;
/* Read Interrupt Status and mask out interrupts that are not enabled. */
intstatus = lpc17_getreg(LPC17_USBHOST_INTST);
intenable = lpc17_getreg(LPC17_USBHOST_INTEN);
ullvdbg("INST: %08x INTEN: %08x\n", intstatus, intenable);
intst = lpc17_getreg(LPC17_USBHOST_INTST);
regval = lpc17_getreg(LPC17_USBHOST_INTEN);
ullvdbg("INST: %08x INTEN: %08x\n", intst, regval);
intstatus &= intenable;
if (intstatus != 0)
pending = intst & regval;
if (pending != 0)
{
/* Root hub status change interrupt */
if ((intstatus & OHCI_INT_RHSC) != 0)
if ((pending & OHCI_INT_RHSC) != 0)
{
uint32_t rhportst1 = lpc17_getreg(LPC17_USBHOST_RHPORTST1);
ullvdbg("Root Hub Status Change, RHPORTST1: %08x\n", rhportst1);
@ -782,9 +780,22 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
/* Writeback Done Head interrupt */
if ((intstatus & OHCI_INT_WDH) != 0)
if ((pending & OHCI_INT_WDH) != 0)
{
/* Get the condition code from the control word */
/* The host controller just wrote the list of finished TDs into the HCCA
* done head. Here we assume that only a single packet is "in flight"
* at any given time and we use only the TD at TDHEAD. So not much needs
* to be done here. In a more complex implementation we would need to
* recover these completed TDs in some meaningful way.
*/
/* Since there is only one TD, we can disable further TD processing. */
regval = lpc17_getreg(LPC17_USBHOST_CTRL);
regval &= ~(OHCI_CTRL_PLE|OHCI_CTRL_IE|OHCI_CTRL_CLE|OHCI_CTRL_BLE);
lpc17_putreg(regval, LPC17_USBHOST_CTRL);
/* Get the condition code from the (single) TDHEAD TD status/control word */
priv->tdstatus = (TDHEAD->ctrl & GTD_STATUS_CC_MASK) >> GTD_STATUS_CC_SHIFT;
@ -807,7 +818,7 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
/* Clear interrupt status register */
lpc17_putreg(intstatus, LPC17_USBHOST_INTST);
lpc17_putreg(intst, LPC17_USBHOST_INTST);
}
return OK;
@ -1563,8 +1574,8 @@ FAR struct usbhost_driver_s *usbhost_initialize(int controller)
* because this register may be shared with other drivers.
*/
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_USBINTST);
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_USBINTST);
regval |= SYSCON_USBINTST_ENINTS;
lpc17_putreg(regval, LPC17_SYSCON_USBINTST);
irqrestore(flags);
@ -1573,5 +1584,14 @@ FAR struct usbhost_driver_s *usbhost_initialize(int controller)
up_enable_irq(LPC17_IRQ_USB); /* enable USB interrupt */
udbg("USB host Initialized\n");
/* If there is a USB device in the slot at power up, then we will not
* get the status change interrupt to signal us that the device is
* connected. We need to set the initial connected state accordingly.
*/
regval = lpc17_getreg(LPC17_USBHOST_RHPORTST1);
priv->connected = ((regval & OHCI_RHPORTST_CCS) != 0);
return &priv->drvr;
}