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* ppc4xx: Autocalibration can set RDCC to over aggressive value.Adam Graham2009-02-12-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The criteria of the AMCC SDRAM Controller DDR autocalibration U-Boot code is to pick the largest passing write/read/compare window that also has the smallest SDRAM_RDCC.[RDSS] Read Sample Cycle Select value. On some Kilauea boards the DDR autocalibration algorithm can find a large passing write/read/compare window with a small SDRAM_RDCC.[RDSS] aggressive value of Read Sample Cycle Select value "T1 Sample". This SDRAM_RDCC.[RDSS] Read Sample Cycle Select value of "T1 Sample" proves to be to aggressive when later on U-Boot relocates into DDR memory and executes. The memory traces on the Kilauea board are short so on some Kilauea boards the SDRAM_RDCC.[RDSS] Read Sample Cycle Select value of "T1 Sample" shows up as a potentially valid value for the DDR autocalibratiion algorithm. The fix is to define a weak default function which provides the minimum SDRAM_RDCC.[RDSS] Read Sample Cycle Select value to accept for DDR autocalibration. The default will be the "T2 Sample" value. A board developer who has a well defined board and chooses to be more aggressive can always provide their own board specific string function with the more aggressive "T1 Sample" value or stick with the default minimum SDRAM_RDCC.[RDSS] value of "T2". Also put in a autocalibration loop fix for case where current write/read/compare passing window size is the same as a prior window size, then in this case choose the write/read/compare result that has the associated smallest RDCC T-Sample value. Signed-off-by: Adam Graham <agraham@amcc.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: PPC44x MQ initializationYuri Tikhonov2008-10-17-0/+5
| | | | | | | | | | | | | | | | | | | Set the MQ Read Passing & MCIF Cycle limits to the recommended by AMCC values. This fixes the occasional 440SPe hard locking issues when the 440SPe's dedicated DMA engines are used (e.g. by the h/w accelerated RAID driver). Previously the appropriate initialization had been made in Linux, by the ppc440spe ADMA driver, which is wrong because modifying the MQ configuration registers after normal operation has begun is not supported and could have unpredictable results. Comment from Stefan: This patch doesn't change the resulting value of the MQ registers. It explicitly sets/clears all bits to the desired state which better documents the resulting register value instead of relying on pre-set default values. Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Stefan Roese <sr@denx.de>
* Revert "ppc4xx: Fix DDR2 auto calibration on Kilauea 600MHz (200MHz PLB)"Stefan Roese2008-09-22-6/+0
| | | | | | This reverts commit 3eec160a3a405b29ce9c06920f6427b9047dd8a8. Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Fix DDR2 auto calibration on Kilauea 600MHz (200MHz PLB)Victor Gallardo2008-09-16-0/+6
| | | | | | Signed-off-by: Victor Gallardo <vgallardo@amcc.com> Signed-off-by: Adam Graham <agraham@amcc.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Move ppc4xx specific prototypes to ppc4xx headerStefan Roese2008-09-08-0/+14
| | | | | | | This patch moves some 4xx specific prototypes out of include common.h to a ppc4xx specific header. Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Update Kilauea to use PPC4xx DDR autocalibration routinesAdam Graham2008-09-05-1/+2
| | | | | Signed-off-by: Adam Graham <agraham@amcc.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Optimize PLB4 Arbiter and Memory Queue settings for PPC440SP/SPe,Prodyut Hazarika2008-08-21-17/+33
| | | | | | | | | | | | | | | PPC405EX and PPC460EX/GT/SX - Read pipeline depth set to 4 for PPC440SP/SPE, PPC405EX, PPC460EX/GT/SX processors - Moved PLB4 Arbiter register definitions to ppc4xx.h since it is shared across processors (405 and 440/460) - Optimize Memory Queue settings for PPC440SP/SPE and PPC460EX/GT/SX processors - Add register bit definitions for Memory Queue Configuration registers Signed-off-by: Prodyut Hazarika <phazarika@amcc.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Add Mnemonics for AMCC/IBM DDR2 SDRAM ControllerGrant Erickson2008-07-11-46/+221
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch completes the preprocessor mneomics for the IBM DDR2 SDRAM controller registers (MODT and INITPLR) used by the PowerPC405EX(r). The MMODE and MEMODE registers are unified with their peer values used for the INITPLR MR and EMR registers, respectively. Finally, a spelling typo is correct (MANUEL to MANUAL). With these mnemonics in place, the CFG_SDRAM0_* magic numbers for Kilauea are replaced by equivalent mnemonics to make it easier to compare and contrast other 405EX(r)-based boards (e.g. during board bring-up). Finally, unified the SDRAM controller register dump routine such that it can be used across all processor variants that utilize the IBM DDR2 SDRAM controller core. It produces output of the form: PPC4xx IBM DDR2 Register Dump: ... SDRAM_MB0CF[40] = 0x00006701 ... which is '<mnemonic>[<DCR #>] = <value>'. The DCR number is included since it is not uncommon that the DCR values in header files get mixed up and it helps to validate, at a glance, they match what is printed in the user manual. Tested on: AMCC Kilauea/Haleakala: - NFS Linux Boot: PASSED - NAND Linux Boot: PASSED Signed-off-by: Grant Erickson <gerickson@nuovations.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Add AMCC/IBM DDR2 SDRAM ECC Field MnemonicsGrant Erickson2008-07-11-0/+52
| | | | | | | | | Add additional DDR2 SDRAM memory controller DCR mneomnics, condition revision ID DCR based on 405EX, and add field mnemonics for bus error status and ECC error status registers. Signed-off-by: Grant Erickson <gerickson@nuovations.com> Signed-off-by: Stefan Roese <sr@denx.de>
* PPC4xx: Correct SDRAM_MCSTAT for PPC405EX(r)Grant Erickson2008-07-11-0/+4
| | | | | | | | | | | | | While the PowerPC 405EX(r) shares in common the AMCC/IBM DDR2 SDRAM controller core also used in the 440SP, 440SPe, 460EX, and 460GT, in the 405EX(r), SDRAM_MCSTAT has a different DCR value. Its present value on the 405EX(r) causes a read back of 0xFFFFFFFF which causes SDRAM initialization to periodically fail since it can prematurely indicate SDRAM ready status. Signed-off-by: Grant Erickson <gerickson@nuovations.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Add initial 460SX reference board (redwood) config file and defines.Feng Kan2008-07-11-1/+2
| | | | | Signed-off-by: Feng Kan <fkan@amcc.com> Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Enable support for > 2GB SDRAM on AMCC KatmaiStefan Roese2008-07-10-2/+2
| | | | | | | | | | | | | Newer PPC's like 440SPe, 460EX/GT can be equipped with more than 2GB of SDRAM. To support such configurations, we "only" map the first 2GB via the TLB's. We need some free virtual address space for the remaining peripherals like, SoC devices, FLASH etc. Note that ECC is currently not supported on configurations with more than 2GB SDRAM. This is because we only map the first 2GB on such systems, and therefore the ECC parity byte of the remaining area can't be written. Signed-off-by: Stefan Roese <sr@denx.de>
* ppc4xx: Consolidate PPC4xx SDRAM/DDR/DDR2 defines, part2Stefan Roese2008-06-03-0/+1156
This patch now adds a new header file (asm-ppc/ppc4xx-sdram.h) for all ppc4xx related SDRAM/DDR/DDR2 controller defines. Signed-off-by: Stefan Roese <sr@denx.de>
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