From: ScottEllis <sco...@gm...> - 2009-12-15 11:48:14
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So I followed your suggestion Soren and did some experimenting with the GPMC[5] register configuration in u-boot. It was good learning thanks! Here are some testing results so far. I am reading the GPMC regs for this in board_overo.c at the end of the function overo_init_smsc911x(). Still trying to figure out the GPMC_CONFIG7.BASEADDRESS difference and why configuring regs 2-6 isn't giving the same write speed as undef'ing CONFIG_CMD_NET in the uboot build. I'm continuing to plug away at this, but if you have any suggestions or observations that would be great. u-boot initialized (stock gumstix config) ============================ NET_GPMC_CONFIG1 0x00001000 NET_GPMC_CONFIG2 0x001e1e01 NET_GPMC_CONFIG3 0x00080300 NET_GPMC_CONFIG4 0x1c091c09 NET_GPMC_CONFIG5 0x04181f1f NET_GPMC_CONFIG6 0x00000fcf NET_GPMC_CONFIG7 0x00000f6c Write : iperf -c 192.168.10.5 -p 2134 [ 3] 0.0-10.0 sec 55.0 MBytes 46.1 Mbits/secgot the GPMC register values putting in some debug code in [ 3] 0.0-10.0 sec 55.1 MBytes 46.2 Mbits/sec [ 3] 0.0-10.0 sec 55.2 MBytes 46.3 Mbits/sec Read : iperf -s -p 2135 [ 4] 0.0-10.0 sec 52.7 MBytes 44.2 Mbits/sec [ 4] 0.0-10.0 sec 52.8 MBytes 44.3 Mbits/sec [ 4] 0.0-10.0 sec 52.6 MBytes 44.1 Mbits/sec remove u-boot initialization of nic (u-boot undef CONFIG_CMD_NET) GPMC_CONFIG2_5 - GPMC_CONFIG6_5 are at their reset defaults ============================ NET_GPMC_CONFIG1 0x00001000 NET_GPMC_CONFIG2 0x00101001 NET_GPMC_CONFIG3 0x00020201 NET_GPMC_CONFIG4 0x10031003 NET_GPMC_CONFIG5 0x010f1111 NET_GPMC_CONFIG6 0x8f030000 NET_GPMC_CONFIG7 0x00000f41 Write : iperf -c 192.168.10.5 -p 2134 [ 3] 0.0-10.0 sec 102 MBytes 85.2 Mbits/sec [ 3] 0.0-10.0 sec 101 MBytes 85.1 Mbits/sec [ 3] 0.0-10.0 sec 101 MBytes 84.8 Mbits/sec Read : iperf -s -p 2135 [ 4] 0.0-10.0 sec 86.6 MBytes 72.6 Mbits/sec [ 4] 0.0-10.0 sec 86.8 MBytes 72.7 Mbits/sec [ 4] 0.0-10.0 sec 86.5 MBytes 72.5 Mbits/sec u-boot initialized CONFIG2-CONFIG6 to defaults left CONFIG1 and CONFIG7 alone patched include/asm-arm/arch-omap3/mem.h ============================ NET_GPMC_CONFIG1 0x00001000 NET_GPMC_CONFIG2 0x00101001 NET_GPMC_CONFIG3 0x00020201 NET_GPMC_CONFIG4 0x10031003 NET_GPMC_CONFIG5 0x010f1111 NET_GPMC_CONFIG6 0x8f030000 NET_GPMC_CONFIG7 0x00000f6c Write : iperf -c 192.168.10.5 -p 2134 [ 3] 0.0-10.0 sec 92.4 MBytes 77.5 Mbits/sec [ 3] 0.0-10.0 sec 92.8 MBytes 77.8 Mbits/sec [ 3] 0.0-10.0 sec 92.9 MBytes 77.9 Mbits/sec Read : iperf -s -p 2135 [ 4] 0.0-10.0 sec 86.9 MBytes 72.8 Mbits/sec [ 4] 0.0-10.0 sec 86.9 MBytes 72.7 Mbits/sec [ 4] 0.0-10.0 sec 86.9 MBytes 72.7 Mbits/sec GPMC[5] Differences In Detail GPMC_CONFIG1_5 ============== u-boot : 0x00001000 : GPMCFCLKDIVIDER = 0 TIMEPARAGRANULARITY = 0 MUXADDDATA = 0 DEVICETYPE = 0 DEVICESIZE = 1 WAITPINSELECT = 0 WAITMONITORINGTIME = 0 WAITWRITEMONITORINGTIME = 0 ATTACHEDDEVICEPAGELENGTH = 0 no uboot : 0x00001000 : GPMCFCLKDIVIDER = 0 (default) TIMEPARAGRANULARITY = 0 (default) MUXADDDATA = 0 DEVICETYPE = 0 (default) DEVICESIZE = 1 WAITPINSELECT = 0 WAITMONITORINGTIME = 0 (default) WAITWRITEMONITORINGTIME = 0 (default) ATTACHEDDEVICEPAGELENGTH = 0 (default) GPMC_CONFIG2_5 ============== u-boot : 0x001e1e01 : CSONTIME = 1 CSEXTRADELAY = 0 CSRDOFFTIME = 30 CSWROFFTIME = 30 no uboot : 0x00101001 : CSONTIME = 1 (default) CSEXTRADELAY = 0 (default) CSRDOFFTIME = 16 (default)got the GPMC register values putting in some debug code in CSWROFFTIME = 16 (default) GPMC_CONFIG3_5 ============== u-boot : 0x00080300 : ADVONTIME = 0 ADVEXTRADELAY = 0 ADVRDOFFTIME = 3 ADVWROFFTIME = 8 no uboot : 0x00020201 : ADVONTIME = 1 (default) ADVEXTRADELAY = 0 (default) ADVRDOFFTIME = 2 (default) ADVWROFFTIME = 2 (default) GPMC_CONFIG4_5 ============== u-boot : 0x1c091c09 : OEONTIME = 9 OEEXTRADELAY = 0 OEOFFTIME = 28 WEONTIME = 9 WEEXTRADELAY = 0 WEOFFTIME = 28 no uboot : 0x10031003 : OEONTIME = 3 (default) OEEXTRADELAY = 0 (default) OEOFFTIME = 16 (default) WEONTIME = 3 (default) WEEXTRADELAY = 0 (default) WEOFFTIME = 16 (default) GPMC_CONFIG5_5 ============== u-boot : 0x04181f1f : RDCYCLETIME = 31 WRCYCLETIME = 31 RDACCESSTIME = 24 PAGEBURSTACCESSTIME = 4 no uboot : 0x010f1111 : RDCYCLETIME = 17 (default) WRCYCLETIME = 17 (default) RDACCESSTIME = 15 (default) PAGEBURSTACCESSTIME = 1 (default) GPMC_CONFIG6_5 ============== u-boot : 0x00000fcf : BUSTURNAROUND = 15 CYCLE2CYCLEDIFFCSEN = 1 CYCLE2CYCLESAMECSEN = 1 CYCLE2CYCLEDELAY = 15 WRDATAONADMUXBUS = 0 WRACCESSTIME = 0 no uboot : 0x8f030000 : BURSTURNAROUND = 0 (default) CYCLE2CYCLEDIFFCSEN = 0 (default) CYCLE2CYCLESAMECSEN = 0 (default) WRDATAONADMUXBUS = 3 (default) WRACCESSTIME = 15 (default) GPMC_CONFIG7_5 ============== u-boot : 0x00000f6c : BASEADDRESS = 0x2C = A26 = 1, A25 = 0, A24 = 0 CSVALID = 1 MASKADDRESS = 0xF no uboot : 0x00000f41 : BASEADDRESS = 0x01 = A26 = 0, A25 = 0, A24 = 1 CSVALID = 1 MASKADDRESS = 0xF (default) -- View this message in context: http://old.nabble.com/Power-for-both-COM-_and_-expansion-board--tp26503706p26793556.html Sent from the Gumstix mailing list archive at Nabble.com. |