On Aug 4, 2011, at 10:44 AM, Kumar Gala wrote:
From: Li Yang leoli@freescale.com
The following boards share a common design but with minor variations between them:
P1020MSBG-PC P1020RDB-PC P1020UTM-PC P1021RDB-PC P1024RDB P1025RDB P2020RDB-PC
The P1020RDB-PC shares its roots in the existing P1020RDB board design, however uses DDR3 instead of DDR2. P2020RDB-PC differs from the P102x RDB-PC with 64-bit DDR and 100Mhz SYSCLK.
Key features on these boards include:
- DDR3
- NOR flash
- NAND flash (on RDB's only)
- SPI flash (on RDB's only)
- SDHC/MMC card slot
- VSC7385 Ethernet switch (on P1020MBG, P1020RDB, & P1021RDB)
- PCIE slot and mini-PCIE slots
As these boards use soldered DDR chips not regular DIMMs, an on-board EEPROM is used to store SPD data. In case of absent or corrupted SPD, falling back to timing data embedded in the source code will be used. Raw timing data is extracted from DDR chip datasheet. Different speeds of DDR are supported with this approach. ODT option is forced to fit this set of boards, again because they don't have regular DIMMs.
CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS is defined as 5ms to meet specification for writing timing.
VSC firmware Address is defined by default in config file for eTSEC1.
SD width is based off DIP switch. DIP switch is detected on the board by reading i2c bus and setting the appropriate mux values.
Some boards have QE module in the silicon (P1021 and P1025). QE and eLBC have pins multiplexing. QE function needs to be disabled to access Nor Flash and CPLD. QE-UEC and QE-UART can be enabled for linux kernel by setting "qe" in hwconfig. In addition, QE-UEC and QE-TDM also have pins multiplexing, to enable QE-TDM for linux kernel, set "qe;tdm" in hwconfig. Syntax is as below
'setenv hwconfig qe' to enable QE UEC/UART and disable Nor-Flash/CPLD. 'setenv hwconfig 'qe;tdm'' to enalbe QE TDM and disable Nor-Flash/CPLD.
Signed-off-by: York Sun yorksun@freescale.com Signed-off-by: Li Yang leoli@freescale.com Signed-off-by: Zhao Chenhui b26998@freescale.com Signed-off-by: Matthew McClintock msm@freescale.com Signed-off-by: Poonam Aggrwal poonam.aggrwal@freescale.com Signed-off-by: Priyanka Jain Priyanka.Jain@freescale.com Signed-off-by: Tang Yuantian b29983@freescale.com Signed-off-by: ramneek.mehresh ramneek.mehresh@freescale.com Signed-off-by: Prabhakar Kushwaha prabhakar@freescale.com Signed-off-by: Matthew McClintock msm@freescale.com Signed-off-by: Xie Xiaobo X.Xie@freescale.com Signed-off-by: Kumar Gala galak@kernel.crashing.org Signed-off-by: Jerry Huang Chang-Ming.Huang@freescale.com Signed-off-by: Akhil Goyal akhil.goyal@freescale.com
v2:
- cleaned up useless typedef
- cleaned up some trailing whitespace
- changes based on CCSR cleanup patch
applied to 85xx next
- k