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SAMV7 USB: Add some conditioned out test code

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This commit is contained in:
Gregory Nutt 2015-03-25 18:45:04 -06:00
parent 8a9d5aa465
commit 3568dcd22f
1 changed files with 26 additions and 7 deletions
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33
arch/arm/src/samv7/sam_usbdevhs.c
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@ -4341,19 +4341,38 @@ static void sam_hw_setup(struct sam_usbdev_s *priv)
/* UTMI parallel mode, High/Full/Low Speed */
#if 1 /* REVISIT */
/* Disable 48MHz USB FS Clock. It is not used in this configuration */
sam_putreg(PMC_USBCLK, SAM_PMC_SCDR);
#else
#if 0 /* REVISIT */
/* UTMI Full/Low Speed mode */
sam_putreg(PMC_USBCLK, SAM_PMC_SCER);
#else
/* Disable 48MHz USB FS Clock. It is not used in this configuration */
sam_putreg(PMC_USBCLK, SAM_PMC_SCDR);
#endif
/* Select the UTMI PLL as the USB clock input with divider = 1. */
/* Select the UTMI PLL as the USB PLL clock input (480MHz) with divider
* to get to 48MHz.
*/
sam_putreg(PMC_USB_USBS_UPLL, SAM_PMC_USB);
regval = PMC_USB_USBS_UPLL;
#if 0 /* REVISIT */
if ((sam_getreg(SAM_PMC_MCKR) & PMC_MCKR_PLLADIV2) != 0)
{
/* Divider = 480 Mhz / 2 / 48 Mhz = 5 */
regval |= PMC_USB_USBDIV(4);
}
else
{
/* Divider = 480 Mhz / 1 / 48 Mhz = 10 */
regval |= PMC_USB_USBDIV(9);
}
#endif
sam_putreg(regval, SAM_PMC_USB);
/* Enable the UTMI PLL with the maximum start-up time */