linux/Documentation/fmc/parameters.txt
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   1Module Parameters in fmc.ko
   2***************************
   3
   4The core driver receives two module parameters, meant to help debugging
   5client modules. Both parameters can be modified by writing to
   6/sys/module/fmc/parameters/, because they are used when client drivers
   7are devices are registered, not when fmc.ko is loaded.
   8
   9`dump_eeprom='
  10     If not zero, the parameter asks the bus controller to dump the
  11     EEPROM of any device that is registered, using printk.
  12
  13`dump_sdb='
  14     If not zero, the parameter prints the SDB tree of every FPGA it is
  15     loaded by fmc_reprogram(). If greater than one, it asks to dump
  16     the binary content of SDB records.  This currently only dumps the
  17     top-level SDB array, though.
  18
  19
  20EEPROM dumping avoids repeating lines, since most of the contents is
  21usually empty and all bits are one or zero. This is an example of the
  22output:
  23
  24        [ 6625.850480] spec 0000:02:00.0: FPGA programming successful
  25        [ 6626.139949] spec 0000:02:00.0: Manufacturer: CERN
  26        [ 6626.144666] spec 0000:02:00.0: Product name: FmcDelay1ns4cha
  27        [ 6626.150370] FMC: mezzanine 0: 0000:02:00.0 on SPEC
  28        [ 6626.155179] FMC: dumping eeprom 0x2000 (8192) bytes
  29        [ 6626.160087] 0000: 01 00 00 01  00 0b 00 f3  01 0a 00 a5  85 87 c4 43
  30        [ 6626.167069] 0010: 45 52 4e cf  46 6d 63 44  65 6c 61 79  31 6e 73 34
  31        [ 6626.174019] 0020: 63 68 61 c7  70 72 6f 74  6f 2d 30 cc  45 44 41 2d
  32        [ 6626.180975] 0030: 30 32 32 36  37 2d 56 33  da 32 30 31  32 2d 31 31
  33        [...]
  34        [ 6626.371366] 0200: 66 64 65 6c  61 79 0a 00  00 00 00 00  00 00 00 00
  35        [ 6626.378359] 0210: 00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00
  36        [ 6626.385361] [...]
  37        [ 6626.387308] 1800: 70 6c 61 63  65 68 6f 6c  64 65 72 ff  ff ff ff ff
  38        [ 6626.394259] 1810: ff ff ff ff  ff ff ff ff  ff ff ff ff  ff ff ff ff
  39        [ 6626.401250] [...]
  40
  41The dump of SDB looks like the following; the example shows the simple
  42golden gateware for the SPEC card, removing the leading timestamps to
  43fit the page:
  44
  45        spec 0000:02:00.0: SDB: 00000651:e6a542c9 WB4-Crossbar-GSI
  46        spec 0000:02:00.0: SDB: 0000ce42:ff07fc47 WR-Periph-Syscon (00000000-000000ff)
  47        FMC: mezzanine 0: 0000:02:00.0 on SPEC
  48        FMC: poor dump of sdb first level:
  49        0000: 53 44 42 2d  00 02 01 00  00 00 00 00  00 00 00 00
  50        0010: 00 00 00 00  00 00 01 ff  00 00 00 00  00 00 06 51
  51        0020: e6 a5 42 c9  00 00 00 02  20 12 05 11  57 42 34 2d
  52        0030: 43 72 6f 73  73 62 61 72  2d 47 53 49  20 20 20 00
  53        0040: 00 00 01 01  00 00 00 07  00 00 00 00  00 00 00 00
  54        0050: 00 00 00 00  00 00 00 ff  00 00 00 00  00 00 ce 42
  55        0060: ff 07 fc 47  00 00 00 01  20 12 03 05  57 52 2d 50
  56        0070: 65 72 69 70  68 2d 53 79  73 63 6f 6e  20 20 20 01
  57
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