Based on kernel version 4.13.3. Page generated on 2017-09-23 13:55 EST.
1 fmc-fakedev 2 =========== 3 4 This package includes a software-only device, called fmc-fakedev, which 5 is able to register up to 4 mezzanines (by default it registers one). 6 Unlike the SPEC driver, which creates an FMC device for each PCI cards 7 it manages, this module creates a single instance of its set of 8 mezzanines. 9 10 It is meant as the simplest possible example of how a driver should be 11 written, and it includes a fake EEPROM image (built using the tools 12 described in *note FMC Identification::),, which by default is 13 replicated for each fake mezzanine. 14 15 You can also use this device to verify the match algorithms, by asking 16 it to test your own EEPROM image. You can provide the image by means of 17 the eeprom= module parameter: the new EEPROM image is loaded, as usual, 18 by means of the firmware loader. This example shows the defaults and a 19 custom EEPROM image: 20 21 spusa.root# insmod fmc-fakedev.ko 22 [ 99.971247] fake-fmc-carrier: mezzanine 0 23 [ 99.975393] Manufacturer: fake-vendor 24 [ 99.979624] Product name: fake-design-for-testing 25 spusa.root# rmmod fmc-fakedev 26 spusa.root# insmod fmc-fakedev.ko eeprom=fdelay-eeprom.bin 27 [ 121.447464] fake-fmc-carrier: Mezzanine 0: eeprom "fdelay-eeprom.bin" 28 [ 121.462725] fake-fmc-carrier: mezzanine 0 29 [ 121.466858] Manufacturer: CERN 30 [ 121.470477] Product name: FmcDelay1ns4cha 31 spusa.root# rmmod fmc-fakedev 32 33 After loading the device, you can use the write_ee method do modify its 34 own internal fake EEPROM: whenever the image is overwritten starting at 35 offset 0, the module will unregister and register again the FMC device. 36 This is shown in fmc-write-eeprom.txt