void turnon_mem_rail(int mv)
{
unsigned int value;
HW_POWER_CTRL_CLR(BM_POWER_CTRL_CLKGATE);
value = BM_POWER_VDDMEMCTRL_ENABLE_ILIMIT|
BM_POWER_VDDMEMCTRL_ENABLE_LINREG|
BM_POWER_VDDMEMCTRL_PULLDOWN_ACTIVE|
(mv-1700)/50;
HW_POWER_VDDMEMCTRL_WR(value);
delay(20000);
value &= ~(BM_POWER_VDDMEMCTRL_ENABLE_ILIMIT|
BM_POWER_VDDMEMCTRL_PULLDOWN_ACTIVE);
HW_POWER_VDDMEMCTRL_WR(value);
}
////////////////////////////////////////////////////////////////////////////////
//! \brief Prepares the power block for the application.
//!
//! \return SUCCESS(0) Power block ready.
////////////////////////////////////////////////////////////////////////////////
//int PowerPrep( void )
int _start( void )
{
int iRtn = SUCCESS;
auart_init();
#ifndef mx28
HW_DIGCTL_CTRL_SET(BM_DIGCTL_CTRL_USE_SERIAL_JTAG);
#else
#define SSP0_PIN_DRIVE_12mA 0x2
// For EMI 200MHz,must enable SSP0 pin drive to 12mA,or the SD boot will fail.
HW_PINCTRL_DRIVE8_CLR(
BM_PINCTRL_DRIVE8_BANK2_PIN07_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN06_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN05_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN04_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN03_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN02_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN01_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN00_MA);
HW_PINCTRL_DRIVE9_CLR(
BM_PINCTRL_DRIVE9_BANK2_PIN10_MA |
BM_PINCTRL_DRIVE9_BANK2_PIN09_MA |
BM_PINCTRL_DRIVE9_BANK2_PIN08_MA);
HW_PINCTRL_DRIVE8_SET(
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN07_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN06_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN05_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN04_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN03_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN02_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN01_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN00_MA));
HW_PINCTRL_DRIVE9_SET(
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE9_BANK2_PIN10_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE9_BANK2_PIN09_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE9_BANK2_PIN08_MA));
#endif
PowerPrep_CPUClock2XTAL();
PowerPrep_ClearAutoRestart();
hw_power_SetPowerClkGate( false );
printf("\r\nPowerPrep start initialize power...\r\n");
HW_POWER_VDDDCTRL.B.LINREG_OFFSET = HW_POWER_LINREG_OFFSET_STEP_BELOW;
HW_POWER_VDDACTRL.B.LINREG_OFFSET = HW_POWER_LINREG_OFFSET_STEP_BELOW;
HW_POWER_VDDIOCTRL.B.LINREG_OFFSET = HW_POWER_LINREG_OFFSET_STEP_BELOW;
// Ready the power block for 5V detection.
PowerPrep_Setup5vDetect();
PowerPrep_SetupBattDetect();
// Ensure the power source that turned on the device is sufficient to
// power the device.
PowerPrep_ConfigurePowerSource();
PowerPrep_EnableOutputRailProtection();
/* 3.3V is necessary to achieve best power supply capability
* and best EMI I/O performance.
*/
ddi_power_SetVddio(3300, 3150);
#ifdef mx28
ddi_power_SetVddd(1350, 1200);
#endif
HW_POWER_CTRL_CLR(BM_POWER_CTRL_VDDD_BO_IRQ |
BM_POWER_CTRL_VDDA_BO_IRQ |
BM_POWER_CTRL_VDDIO_BO_IRQ |
BM_POWER_CTRL_VDD5V_DROOP_IRQ |
BM_POWER_CTRL_VBUSVALID_IRQ |
BM_POWER_CTRL_BATT_BO_IRQ |
BM_POWER_CTRL_DCDC4P2_BO_IRQ
);
/* If Battery not ready,setup the auto power down if we lost 5V.*/
if (!bBatteryReady)
HW_POWER_5VCTRL_SET(BM_POWER_5VCTRL_PWDN_5VBRNOUT);
return iRtn;
}
////////////////////////////////////////////////////////////////////////////////
//! \brief Prepares the power block for the application.
//!
//! \return SUCCESS(0) Power block ready.
////////////////////////////////////////////////////////////////////////////////
//int PowerPrep( void )
int _start( void )
{
int iRtn = SUCCESS;
#ifndef mx28
HW_DIGCTL_CTRL_SET(BM_DIGCTL_CTRL_USE_SERIAL_JTAG);
#else
#define SSP0_PIN_DRIVE_12mA 0x2
// For EMI 200MHz,must enable SSP0 pin drive to 12mA,or the SD boot will fail.
HW_PINCTRL_DRIVE8_CLR(
BM_PINCTRL_DRIVE8_BANK2_PIN07_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN06_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN05_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN04_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN03_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN02_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN01_MA |
BM_PINCTRL_DRIVE8_BANK2_PIN00_MA);
HW_PINCTRL_DRIVE9_CLR(
BM_PINCTRL_DRIVE9_BANK2_PIN10_MA |
BM_PINCTRL_DRIVE9_BANK2_PIN09_MA |
BM_PINCTRL_DRIVE9_BANK2_PIN08_MA);
HW_PINCTRL_DRIVE8_SET(
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN07_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN06_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN05_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN04_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN03_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN02_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN01_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE8_BANK2_PIN00_MA));
HW_PINCTRL_DRIVE9_SET(
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE9_BANK2_PIN10_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE9_BANK2_PIN09_MA) |
(SSP0_PIN_DRIVE_12mA << BP_PINCTRL_DRIVE9_BANK2_PIN08_MA));
#endif
PowerPrep_CPUClock2XTAL();
PowerPrep_ClearAutoRestart();
hw_power_SetPowerClkGate( false );
printf("\r\nPowerPrep start initialize power...\r\n");
HW_POWER_VDDDCTRL.B.LINREG_OFFSET = HW_POWER_LINREG_OFFSET_STEP_BELOW;
HW_POWER_VDDACTRL.B.LINREG_OFFSET = HW_POWER_LINREG_OFFSET_STEP_BELOW;
HW_POWER_VDDIOCTRL.B.LINREG_OFFSET = HW_POWER_LINREG_OFFSET_STEP_BELOW;
// Ready the power block for 5V detection.
PowerPrep_Setup5vDetect();
PowerPrep_SetupBattDetect();
// Ensure the power source that turned on the device is sufficient to
// power the device.
PowerPrep_ConfigurePowerSource();
PowerPrep_EnableOutputRailProtection();
/* 3.3V is necessary to achieve best power supply capability
* and best EMI I/O performance.
*/
ddi_power_SetVddio(3300, 3150);
HW_POWER_CTRL_CLR(BM_POWER_CTRL_VDDD_BO_IRQ |
BM_POWER_CTRL_VDDA_BO_IRQ |
BM_POWER_CTRL_VDDIO_BO_IRQ |
BM_POWER_CTRL_VDD5V_DROOP_IRQ |
BM_POWER_CTRL_VBUSVALID_IRQ |
BM_POWER_CTRL_BATT_BO_IRQ |
BM_POWER_CTRL_DCDC4P2_BO_IRQ
);
/* If Battery not ready,setup the auto power down if we lost 5V.*/
if (!bBatteryReady)
{
HW_POWER_5VCTRL_SET(BM_POWER_5VCTRL_PWDN_5VBRNOUT);
#if defined(NO_DCDC_BATT_SOURCE) && defined(mx28)
/* On i.MX28, a new bit has been added to allow automatic hardware
* shutdown if VDD4P2 browns out. If we permanently only have a VDD5V
* source, we want to enable this bit. For devices with dead batteries,
* we could also temporarily set this bit until the kernel battery
* charger sufficiently charges the battery but we won't do this for
* now as the latest release kernel versions aren't aware of it
* and thus don't handle the proper setting/clearing of this bit.
*/
HW_POWER_REFCTRL_SET(1<<7);
#endif
}
return iRtn;
}
/* called during probe() after chip reset completes */
static int ehci_fsl_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int retval;
struct fsl_usb2_platform_data *pdata;
pdata = hcd->self.controller->platform_data;
ehci->big_endian_desc = pdata->big_endian_desc;
ehci->big_endian_mmio = pdata->big_endian_mmio;
/* EHCI registers start at offset 0x100 */
ehci->caps = hcd->regs + 0x100;
ehci->regs = hcd->regs + 0x100 +
HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
dbg_hcs_params(ehci, "reset");
dbg_hcc_params(ehci, "reset");
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
retval = ehci_halt(ehci);
/* data structure init */
retval = ehci_init(hcd);
if (retval)
return retval;
hcd->has_tt = 1;
ehci->sbrn = 0x20;
ehci_reset(ehci);
retval = ehci_fsl_reinit(ehci);
#ifdef CHUMBY_USB_MODIFICATIONS
/* Also, disable the IRQ for the 5V line. Turning on the screen causes
* a massive drop in power, and the battery circuitry thinks we've
* pulled the 5V line.
*/
HW_POWER_CTRL_CLR(1);
/* Wait just enough time for the brownout. Any less than this and it
* reboots when we bring the USB card up, or segfaults.
*/
msleep(5);
/* Set bank 0, pins 26 and 28 to GPIO. */
HW_PINCTRL_MUXSEL1_SET(0x03300000);
/* Set both pins to low, which ensures a reset takes place. */
HW_PINCTRL_DOUT0_CLR(0x24000000);
HW_PINCTRL_DOE0_SET(0x24000000);
HW_PINCTRL_DOUT0_CLR(0x24000000);
msleep(5);
/* Delay for one second, giving most USB devices the chance to
* recognize they've been "unplugged".
*/
msleep(1000);
/* Write a "1" to bank 0, pin 28. */
HW_PINCTRL_DOUT0_SET(0x20000000);
msleep(5);
/* Write a "1" to bank 0, pin 26, to disable USB. This ensures a reset.
* Wait a short time after, then re-enable the IRQ that fires when power
* is pulled. This is because by now, the voltages should have
* stabilized.
*/
HW_PINCTRL_DOUT0_SET(0x04000000);
msleep(5);
/* Re-enable the power interrupt. */
HW_POWER_CTRL_SET(1);
#endif /*CHUMBY_USB_MODIFICATIONS*/
return retval;
}
