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Minor usb-related

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3150 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2010-11-30 19:35:24 +00:00
parent 8822ca3aba
commit a92f128b34
1 changed files with 12 additions and 22 deletions
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34
arch/arm/src/lpc17xx/lpc17_usbdev.c
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@ -106,7 +106,7 @@
/* CLKCTRL enable bits */
#define LPC17_CLKCTRL_ENABLES (USBDEV_CLK_DEVCLK|USBDEV_CLK_PORTSELCLK|USBDEV_CLK_AHBCLK)
#define LPC17_CLKCTRL_ENABLES (USBDEV_CLK_DEVCLK|USBDEV_CLK_AHBCLK)
/* Dump GPIO registers */
@ -3153,9 +3153,19 @@ void up_usbinitialize(void)
/* Step 2: Enable clocking on USB (USB PLL clocking was initialized in
* in very low-level clock setup logic (see lpc17_clockconfig.c)). We
* do still need to set up USBCLKCTRL -- see below.
* do still need to set up USBCLKCTRL to enable device and AHB clocking.
*/
lpc17_putreg(LPC17_CLKCTRL_ENABLES, LPC17_USBDEV_CLKCTRL);
/* Then wait for the clocks to be reported as "ON" */
do
{
regval = lpc17_getreg(LPC17_USBDEV_CLKST);
}
while ((regval & LPC17_CLKCTRL_ENABLES) != LPC17_CLKCTRL_ENABLES);
/* Step 3: Configure I/O pins */
usbdev_dumpgpio();
@ -3228,26 +3238,6 @@ void up_usbinitialize(void)
}
}
/* Turn on USB power */
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_PCONP);
regval |= SYSCON_PCONP_PCUSB;
lpc17_putreg(regval, LPC17_SYSCON_PCONP);
irqrestore(flags);
/* Enable device and AHB clocking */
lpc17_putreg(LPC17_CLKCTRL_ENABLES, LPC17_USBDEV_CLKCTRL);
/* And wait for the clocks to be reported as "ON" */
do
{
regval = lpc17_getreg(LPC17_USBDEV_CLKST);
}
while ((regval & LPC17_CLKCTRL_ENABLES) != LPC17_CLKCTRL_ENABLES);
/* Make sure all USB interrupts are disabled and cleared */
lpc17_putreg(0, LPC17_USBDEV_INTEN);