> -----Original Message----- > From: Joachim Foerster [mailto:j...@gmx.de] > Sent: Friday, June 05, 2009 9:34 AM > To: linuxppc-...@ozlabs.org; John Linn; dbrown...@users.sourceforge.net > Cc: lor...@missinglinkelectronics.com; joac...@missinglinkelectronics.com > Subject: SD card over (xilinx_)SPI, timeout error while CID > > Hi, > > we have a very strange problem with SD-card-over-SPI support using > 2.6.29.4 on our custom PowerPC 405 (Virtex-4 FX FPGA) based board. To > summarize the problem in one sentence: mmc_spi gets a timeout (error > -110) after sending MMC command "CMD10" (CID, card identification?). > > The attached log file shows device registration messages during bootup > and debug/error messages after inserting a SD card. > > ATM we are migrating from 2.6.26 (old arch/ppc-based, non-device-tree) > to the already mentioned version 2.6.29.4 (arch/powerpc, device tree). > We use Xilinx' opb_spi core (v1.00.e, EDK 9.1.02i) inside the FPGA, > which is connected to a SD card slot. With our old 2.6.26 kernel, SD > cards _are working fine_!. > > To solve the problem, among other things, we tried 2.6.26+arch/powerpc > (applying only necessary patches to support/include SPI, MMC OF > bindings) - but the result is the same (error -110). The same is also > true for > 2.6.28+arch/powerpc and Linus-HEAD+arch/powerpc . Then we checked these > patches, which add OF bindings for > SPI/MMC/..., line by line and did not find any hint. > For debugging we added a lot of printks ;-) and noticed that then there > are less timeouts (error -110), but CRC check errors (-EILSEQ, > mmc_spi.c, mmc_spi_readblock) happen - maybe even signal shifts/sampling > errors? > > To complete confusion :-( the same setup (xilinx_spi+opb_spi) using an > ADS7846 touchscreen controller as SPI slave _does work_ correctly > > Our current guess is, that it could be a more "basic" (?) error in > arch/powerpc . But we have no lead ATM. > > Any hints? Does anybody use SD card support with mmc_spi+xilinx_spi ? >
There were definitely some changes to the spi driver as I had to make it use the device tree. I have not tested with SD as I don't have a board with SD memory. I have only tested with a serial eeprom. Sorry not much help. If I had to guess I would also think it might be device tree related. -- John > Joachim > > -- > for reference: relevant DTS entry: > > opb_spi_0: s...@41240000 { > #address-cells = <1>; > #size-cells = <0>; > > compatible = "xlnx,opb-spi-1.00.e"; > reg = <0x41240000 0x10000>; > interrupt-parent = <&opb_intc_0>; > interrupts = <7 2>; > > xlnx,depth = <0x10>; > xlnx,dev-blk-id = <0x4>; > xlnx,dev-mir-enable = <0x0>; > xlnx,family = "virtex4"; > xlnx,fifo-exist = <0x1>; > xlnx,interrupt-present = <0x1>; > xlnx,ip-reg-bar-offset = <0x60>; > xlnx,num-bits-reg = <0x8>; > xlnx,num-bits-sr = <0x8>; > xlnx,num-offchip-ss-bits = <0x0>; > xlnx,num-ss-bits = <0x1>; > xlnx,occupancy-num-bits = <0x4>; > xlnx,spi-slave-only = <0x0>; > > mmc-s...@0 { > compatible = "mmc-spi-slot"; > reg = <0>; > gpios = <&opb_gpio_1 0 1>; > voltage-ranges = <3300 3300>; > spi-max-frequency = <6250000>; > }; > }; > > dmesg during boot sequence, messages concerning SPI and MMC/SD only: > > [ 30.677087] xilinx-xps-spi 41240000.spi: at 0x41240000 mapped to > 0xC9040000, irq=18 > [ 30.875967] mmc_spi spi32766.0: SD/MMC host mmc0, no WP, no poweroff, > cd polling > > dmesg after inserting a SD card: > > [ 105.375146] mmc0: clock 0Hz busmode 2 powermode 1 cs 1 Vdd 21 width 0 > timing 0 > [ 105.381246] mmc_spi spi32766.0: mmc_spi: power up (21) > [ 105.388286] mmc0: clock 400000Hz busmode 2 powermode 2 cs 1 Vdd 21 > width 0 timing 0 > [ 105.394839] mmc_spi spi32766.0: mmc_spi: power on (21) > [ 105.400197] mmc_spi spi32766.0: xilinx_spi_setup, unsupported mode > bits 4 > [ 105.406601] mmc_spi spi32766.0: can't change chip-select polarity > [ 105.414666] mmc0: starting CMD0 arg 00000000 flags 000000c0 > [ 105.419176] mmc_spi spi32766.0: mmc_spi: CMD0, resp R1 > [ 105.424511] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.431557] mmc0: req done (CMD0): 0: 00000001 00000000 00000000 > 00000000 > [ 105.439251] mmc0: starting CMD8 arg 000001aa flags 000002f5 > [ 105.443770] mmc_spi spi32766.0: mmc_spi: CMD8, resp R3/R4/R7 > [ 105.449740] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.456789] mmc0: req done (CMD8): 0: 00000001 000001aa 00000000 > 00000000 > [ 105.463502] mmc0: starting CMD5 arg 00000000 flags 000002e1 > [ 105.468999] mmc_spi spi32766.0: mmc_spi: CMD5, resp R3/R4/R7 > [ 105.474968] mmc_spi spi32766.0: ... CMD5 response SPI_R3/R4/R: resp > 0005 ffffffff > [ 105.482448] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.489606] mmc0: req done (CMD5): -22: 00000005 ffffffff 00000000 > 00000000 > [ 105.496511] mmc0: starting CMD55 arg 00000000 flags 000000f5 > [ 105.502092] mmc_spi spi32766.0: mmc_spi: CMD55, resp R1 > [ 105.507645] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.514650] mmc0: req done (CMD55): 0: 00000001 00000000 00000000 > 00000000 > [ 105.521476] mmc0: starting CMD41 arg 00000000 flags 000000e1 > [ 105.527055] mmc_spi spi32766.0: mmc_spi: CMD41, resp R1 > [ 105.532615] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.539646] mmc0: req done (CMD41): 0: 00000001 00000000 00000000 > 00000000 > [ 105.546424] mmc0: starting CMD0 arg 00000000 flags 000000c0 > [ 105.551986] mmc_spi spi32766.0: mmc_spi: CMD0, resp R1 > [ 105.557387] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.564440] mmc0: req done (CMD0): 0: 00000001 00000000 00000000 > 00000000 > [ 105.572158] mmc0: starting CMD58 arg 00000000 flags 00000280 > [ 105.576741] mmc_spi spi32766.0: mmc_spi: CMD58, resp R3/R4/R7 > [ 105.582795] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.589846] mmc0: req done (CMD58): 0: 00000001 00ff8000 00000000 > 00000000 > [ 105.596650] mmc0: clock 400000Hz busmode 2 powermode 2 cs 1 Vdd 20 > width 0 timing 0 > [ 105.604258] mmc0: starting CMD0 arg 00000000 flags 000000c0 > [ 105.609744] mmc_spi spi32766.0: mmc_spi: CMD0, resp R1 > [ 105.615214] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.622217] mmc0: req done (CMD0): 0: 00000001 00000000 00000000 > 00000000 > [ 105.629975] mmc0: starting CMD8 arg 000001aa flags 000002f5 > [ 105.634459] mmc_spi spi32766.0: mmc_spi: CMD8, resp R3/R4/R7 > [ 105.640457] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.647472] mmc0: req done (CMD8): 0: 00000001 000001aa 00000000 > 00000000 > [ 105.654162] mmc0: starting CMD55 arg 00000000 flags 000000f5 > [ 105.659796] mmc_spi spi32766.0: mmc_spi: CMD55, resp R1 > [ 105.665301] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.672372] mmc0: req done (CMD55): 0: 00000001 00000000 00000000 > 00000000 > [ 105.679157] mmc0: starting CMD41 arg 40000000 flags 000000e1 > [ 105.684737] mmc_spi spi32766.0: mmc_spi: CMD41, resp R1 > [ 105.690267] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.697327] mmc0: req done (CMD41): 0: 00000001 00000000 00000000 > 00000000 > ... > CMD55 + CMD41 repeated 3 times, same messages as above. > ... > [ 105.895962] mmc0: starting CMD59 arg 00000001 flags 00000080 > [ 105.901545] mmc_spi spi32766.0: mmc_spi: CMD59, resp R1 > [ 105.907129] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.914091] mmc0: req done (CMD59): 0: 00000000 00000000 00000000 > 00000000 > [ 105.920964] mmc0: starting CMD10 arg 00000000 flags 000000b5 > [ 105.926517] mmc0: blksz 16 blocks 1 flags 00000200 tsac 0 ms nsac > 64 > [ 105.933195] mmc_spi spi32766.0: mmc_spi: CMD10, resp R1 > [ 105.938693] mmc_spi spi32766.0: mmc_spi: read block, 16 bytes > [ 105.944823] mmc_spi spi32766.0: read error ffffff92 (-110) > [ 105.950015] mmc_spi spi32766.0: read status -110 > [ 105.954579] mmc_spi spi32766.0: xilinx_spi_setup, mode 0, 8 bits/w, 0 > nsec/bit > [ 105.961806] mmc0: req done (CMD10): 0: 00000000 00000000 00000000 > 00000000 > [ 105.968609] mmc0: 0 bytes transferred: -110 > [ 105.973082] mmc0: clock 0Hz busmode 2 powermode 0 cs 1 Vdd 0 width 0 > timing 0 > [ 105.980189] mmc_spi spi32766.0: mmc_spi: power off (0) > [ 105.985254] mmc0: error -110 whilst initialising SD card > > This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. 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