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Diffstat (limited to 'Documentation/fmc/parameters.txt')
| -rw-r--r-- | Documentation/fmc/parameters.txt | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Documentation/fmc/parameters.txt b/Documentation/fmc/parameters.txt new file mode 100644 index 000000000000..59edf088e3a4 --- /dev/null +++ b/Documentation/fmc/parameters.txt @@ -0,0 +1,56 @@ +Module Parameters in fmc.ko +*************************** + +The core driver receives two module parameters, meant to help debugging +client modules. Both parameters can be modified by writing to +/sys/module/fmc/parameters/, because they are used when client drivers +are devices are registered, not when fmc.ko is loaded. + +`dump_eeprom=' + If not zero, the parameter asks the bus controller to dump the + EEPROM of any device that is registered, using printk. + +`dump_sdb=' + If not zero, the parameter prints the SDB tree of every FPGA it is + loaded by fmc_reprogram(). If greater than one, it asks to dump + the binary content of SDB records. This currently only dumps the + top-level SDB array, though. + + +EEPROM dumping avoids repeating lines, since most of the contents is +usually empty and all bits are one or zero. This is an example of the +output: + + [ 6625.850480] spec 0000:02:00.0: FPGA programming successful + [ 6626.139949] spec 0000:02:00.0: Manufacturer: CERN + [ 6626.144666] spec 0000:02:00.0: Product name: FmcDelay1ns4cha + [ 6626.150370] FMC: mezzanine 0: 0000:02:00.0 on SPEC + [ 6626.155179] FMC: dumping eeprom 0x2000 (8192) bytes + [ 6626.160087] 0000: 01 00 00 01 00 0b 00 f3 01 0a 00 a5 85 87 c4 43 + [ 6626.167069] 0010: 45 52 4e cf 46 6d 63 44 65 6c 61 79 31 6e 73 34 + [ 6626.174019] 0020: 63 68 61 c7 70 72 6f 74 6f 2d 30 cc 45 44 41 2d + [ 6626.180975] 0030: 30 32 32 36 37 2d 56 33 da 32 30 31 32 2d 31 31 + [...] + [ 6626.371366] 0200: 66 64 65 6c 61 79 0a 00 00 00 00 00 00 00 00 00 + [ 6626.378359] 0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 + [ 6626.385361] [...] + [ 6626.387308] 1800: 70 6c 61 63 65 68 6f 6c 64 65 72 ff ff ff ff ff + [ 6626.394259] 1810: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff + [ 6626.401250] [...] + +The dump of SDB looks like the following; the example shows the simple +golden gateware for the SPEC card, removing the leading timestamps to +fit the page: + + spec 0000:02:00.0: SDB: 00000651:e6a542c9 WB4-Crossbar-GSI + spec 0000:02:00.0: SDB: 0000ce42:ff07fc47 WR-Periph-Syscon (00000000-000000ff) + FMC: mezzanine 0: 0000:02:00.0 on SPEC + FMC: poor dump of sdb first level: + 0000: 53 44 42 2d 00 02 01 00 00 00 00 00 00 00 00 00 + 0010: 00 00 00 00 00 00 01 ff 00 00 00 00 00 00 06 51 + 0020: e6 a5 42 c9 00 00 00 02 20 12 05 11 57 42 34 2d + 0030: 43 72 6f 73 73 62 61 72 2d 47 53 49 20 20 20 00 + 0040: 00 00 01 01 00 00 00 07 00 00 00 00 00 00 00 00 + 0050: 00 00 00 00 00 00 00 ff 00 00 00 00 00 00 ce 42 + 0060: ff 07 fc 47 00 00 00 01 20 12 03 05 57 52 2d 50 + 0070: 65 72 69 70 68 2d 53 79 73 63 6f 6e 20 20 20 01 |