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022c674728
This is selected sections of the current manual for fmc-bus, as developed outside of the kernel before submission. Like the other patches in this set, it corresponds to commit ab23167f of the repository at ohwr.org Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Juan David Gonzalez Cobas <dcobas@cern.ch> Acked-by: Emilio G. Cota <cota@braap.org> Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Acked-by: Rob Landley <rob@landley.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
56 lines
2.8 KiB
Text
56 lines
2.8 KiB
Text
Module Parameters in fmc.ko
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***************************
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The core driver receives two module parameters, meant to help debugging
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client modules. Both parameters can be modified by writing to
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/sys/module/fmc/parameters/, because they are used when client drivers
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are devices are registered, not when fmc.ko is loaded.
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`dump_eeprom='
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If not zero, the parameter asks the bus controller to dump the
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EEPROM of any device that is registered, using printk.
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`dump_sdb='
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If not zero, the parameter prints the SDB tree of every FPGA it is
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loaded by fmc_reprogram(). If greater than one, it asks to dump
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the binary content of SDB records. This currently only dumps the
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top-level SDB array, though.
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EEPROM dumping avoids repeating lines, since most of the contents is
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usually empty and all bits are one or zero. This is an example of the
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output:
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[ 6625.850480] spec 0000:02:00.0: FPGA programming successful
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[ 6626.139949] spec 0000:02:00.0: Manufacturer: CERN
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[ 6626.144666] spec 0000:02:00.0: Product name: FmcDelay1ns4cha
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[ 6626.150370] FMC: mezzanine 0: 0000:02:00.0 on SPEC
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[ 6626.155179] FMC: dumping eeprom 0x2000 (8192) bytes
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[ 6626.160087] 0000: 01 00 00 01 00 0b 00 f3 01 0a 00 a5 85 87 c4 43
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[ 6626.167069] 0010: 45 52 4e cf 46 6d 63 44 65 6c 61 79 31 6e 73 34
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[ 6626.174019] 0020: 63 68 61 c7 70 72 6f 74 6f 2d 30 cc 45 44 41 2d
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[ 6626.180975] 0030: 30 32 32 36 37 2d 56 33 da 32 30 31 32 2d 31 31
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[...]
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[ 6626.371366] 0200: 66 64 65 6c 61 79 0a 00 00 00 00 00 00 00 00 00
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[ 6626.378359] 0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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[ 6626.385361] [...]
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[ 6626.387308] 1800: 70 6c 61 63 65 68 6f 6c 64 65 72 ff ff ff ff ff
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[ 6626.394259] 1810: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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[ 6626.401250] [...]
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The dump of SDB looks like the following; the example shows the simple
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golden gateware for the SPEC card, removing the leading timestamps to
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fit the page:
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spec 0000:02:00.0: SDB: 00000651:e6a542c9 WB4-Crossbar-GSI
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spec 0000:02:00.0: SDB: 0000ce42:ff07fc47 WR-Periph-Syscon (00000000-000000ff)
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FMC: mezzanine 0: 0000:02:00.0 on SPEC
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FMC: poor dump of sdb first level:
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0000: 53 44 42 2d 00 02 01 00 00 00 00 00 00 00 00 00
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0010: 00 00 00 00 00 00 01 ff 00 00 00 00 00 00 06 51
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0020: e6 a5 42 c9 00 00 00 02 20 12 05 11 57 42 34 2d
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0030: 43 72 6f 73 73 62 61 72 2d 47 53 49 20 20 20 00
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0040: 00 00 01 01 00 00 00 07 00 00 00 00 00 00 00 00
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0050: 00 00 00 00 00 00 00 ff 00 00 00 00 00 00 ce 42
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0060: ff 07 fc 47 00 00 00 01 20 12 03 05 57 52 2d 50
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0070: 65 72 69 70 68 2d 53 79 73 63 6f 6e 20 20 20 01
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