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Documentation / fmc / parameters.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:03 EST.

1	Module Parameters in fmc.ko
2	***************************
3	
4	The core driver receives two module parameters, meant to help debugging
5	client modules. Both parameters can be modified by writing to
6	/sys/module/fmc/parameters/, because they are used when client drivers
7	are 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	
20	EEPROM dumping avoids repeating lines, since most of the contents is
21	usually empty and all bits are one or zero. This is an example of the
22	output:
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	
41	The dump of SDB looks like the following; the example shows the simple
42	golden gateware for the SPEC card, removing the leading timestamps to
43	fit 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
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