====== BSP ======

===== Status =====

==== Preps & U-Boot ====

^ Component ^ Status ^ Remarks ^
| Power_prep | + | boots via MFG and from eMMC |
| Boot_prep | + | boots via MFG and from eMMC |
| U-Boot | + | boots via MFG and from eMMC |

==== Linux-Kernel ====

^ Component ^ Status ^ Remarks ^
| Boot | + | using U-Boot via TFTP or from eMMC  |
| Ethernet | + |  |
| eMMC | + | no DDR, cf. problems  |
| ext. SD | + |  |
| Display | + |  |
| Touch | + |  |
| USB | + |  |
| Sound | +/? | HP OUT works, Mic IN works in general, noisy. SGTL5000 at I2C Bus sporadically hangs |
| EEProm | + | Reading and writing via sysfs works  |
| CAN | + | CAN0 <-> CAN1 Controller via Bus tested  |
| DUART | + | |
| GPIO | +/? | GPIO Port 0 measured at PCA9954 Chip @0x20 - works. More tests required.  |
| AUART0 | + | RS-422 tested  |
| AUART1 | + |  |
| AUART2 | ./.  | not connected  |
| AUART3 | + | RTS/CTS not tested  |
| AUART4 | + | RTS/CTS not tested  |
| Akku/Goldcap | ? |  |
| Buzzer | + | Edge 0->1 at Pin 24 of GPIO Bank 0 creates short beep|


===== Problems =====

^ Subject ^ Description ^ Status ^ Remark ^
| Rescue Mode  | Rescue Mode Installation sporadically hangs | | |
| Sound  | SGTL5000 at I2C Bus sporadically hangs | | |
| MDIO Timeout  | Re-initialization the FEC interface results in MDIO Timeout, interface permanently down afterwards  | Workaround | |
| DDR eMMC  | doesn't work | Workaround | DDR disabled |
| Crash I2C  | sporadic crashes during kernel boot and I2C initialization  | OKAY | currently not occuring any more  |
| Kernel Oops  | at reboot and halt  | OKAY | currently not occuring any more  |
| USB | upper USB-Port does not get power  | OKAY | |
| Ethernet  | ethernet hangs to often after re-initialization  | OKAY | workaround "Reset PHY" seems to work (SVN r50)  |
| MMC Card Insertion  | Detection should be configurable seperately for each interfacce (eMMC vs. ext. SD)  | OKAY | |
| Link status  | the link status of the PHYs  is not recognized correctly (U-Boot + Kernel)  | OKAY | hardware has been modified (Phy Addr 0 was connected to FEC1 and Phy Addr 1 to FEC0)  |
| Boot eMMC  | does not work, ROM Booter not accessing the eMMC  | OKAY | HW problem, pull-ups required at LCD_D00+03  |
| OTP fuses  | OTP fuses cannot be blown, no tool available  | OKAY | tool not necessarily required. Programm only available from Freescale under NDA, kernel provides OTP Treiber, may be worth trying  |

===== Next steps =====
^ Subject ^ Comment ^
| Goldcap  | Goldcap for RTC  |
| rechargeable battery  | battery operation, charging  |

===== Next but one steps =====
| PM | analysis of power management, battery management  |
| Kernel 3.0  | clarification required on how comprehensive the iMX28 is supported in the current kernel  |