void
init_hwinfo()
{
/* start the on-chip PHY and its PLL */
phy_on(AM335X_USBCTRL0);
usb_delay(5);
phy_on(AM335X_USBCTRL1);
usb_delay(5);
/* Force enable of CLKDCOLDO clock */
out32(AM335X_CM_CLKDCOLDO_DPLL_PER, DPLL_CLKDCOLDO_GATE_CTRL);
}
static void as3525v2_disconnect(void)
{
/* Disable clock */
CGU_USB = 0;
usb_delay();
bitclr32(&CGU_PERI, CGU_USB_CLOCK_ENABLE);
}
static void as3525v2_disconnect(void)
{
/* Disconnect */
DCTL |= DCTL_sftdiscon;
sleep(HZ/20);
/* Disable clock */
CGU_USB = 0;
usb_delay();
bitclr32(&CGU_PERI, CGU_USB_CLOCK_ENABLE);
}
static void as3525v2_connect(void)
{
logf("usb-drv: init as3525v2");
/* 1) enable usb core clock */
bitset32(&CGU_PERI, CGU_USB_CLOCK_ENABLE);
usb_delay();
/* 2) enable usb phy clock */
CCU_USB = (CCU_USB & ~(3<<24)) | (1 << 24); /* ?? */
/* PHY clock */
CGU_USB = 1<<5 /* enable */
| 0 << 2
| 0; /* source = ? (24MHz crystal?) */
usb_delay();
/* 3) clear "stop pclk" */
PCGCCTL &= ~0x1;
usb_delay();
/* 4) clear "power clamp" */
PCGCCTL &= ~0x4;
usb_delay();
/* 5) clear "reset power down module" */
PCGCCTL &= ~0x8;
usb_delay();
/* 6) set "power on program done" */
DCTL |= DCTL_pwronprgdone;
usb_delay();
/* 7) core soft reset */
GRSTCTL |= GRSTCTL_csftrst;
usb_delay();
/* 8) hclk soft reset */
GRSTCTL |= GRSTCTL_hsftrst;
usb_delay();
/* 9) flush and reset everything */
GRSTCTL |= 0x3f;
usb_delay();
/* 10) force device mode*/
GUSBCFG &= ~GUSBCFG_force_host_mode;
GUSBCFG |= GUSBCFG_force_device_mode;
usb_delay();
/* 11) Do something that is probably CCU related but undocumented*/
CCU_USB |= 0x1000;
CCU_USB &= ~0x300000;
usb_delay();
/* 12) reset usb core parameters (dev addr, speed, ...) */
DCFG = 0;
usb_delay();
}
