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XIO3130: Drive XIO3130 GPIOs

Dhaivat Master
Intellectual 385 points
Part Number: XIO3130
Other Parts Discussed in Thread: XIO2001

We have used XIO3130 PCIe switch in one of our design application. On downstream side, we have connected 
three Wi-Fi modules. 

The control pins for these modules (For Example, disable signal, clock request signal) are connected to the GPIOs
of XIO3130 switch. Upstream port is connected to NXP P1020 processor.

Can we drive these GPIO pins with software kernel running in P1020? and can we configure the state (input, output or float) of these GPIOs 
through software or it has to be done through the EEPROM?

Thanks,
Dhaivat Master

  • 0
    TI__Guru 64326 points
    Dhaivat,

    Changes to XIO3130 GPIO registers should be done through the EEPROM but the EEPROM can be accessed through software, see 3.4.4 Accessing Serial Bus Devices Through Software in data manual for details. Status registers for GPIO's can be read this way however EEPROM configurations are only read by XIO3130 after the assertion of /PERST thus changes tot the GPIO configuration would require a PCIe bus reset.
  • 0 in reply to Malik Barton57
    Intellectual 385 points
    Malik Barton,

    Can you provide the default EEPROM file for XIO3130?

    -Dhaivat
  • 0 in reply to Dhaivat Master
    TI__Guru 64326 points

    Dhaivat,

    Unfortunately we do not have a default EEPROM file for XIO3130 however suggested register values are located in Table 3-3. EEPROM Register Loading Map.(second Column). 

  • 0 in reply to Malik Barton57
    Intellectual 385 points
    Malik Barton,

    How can I generate the EEPROM file?
  • 0 in reply to Dhaivat Master
    TI__Guru 64326 points

    Dhaivat,

    The file would need to be made manually (generally a simple .txt file) and the structure of the file depends on the device that is writing to the EEPROM (in your case this is the NXP P1020 processor). Attached is a example for XIO2001 (just to give you any idea what an EEPROM file could look like), I recommend not using the file for XIO3130 directly.

    Fullscreen XIO2001_EEPROM.txt Download 
    EEPROM Data File
000	00	00000000
001	24	00100100
002	00	00000000
003	00	00000000
004	00	00000000
005	00	00000000
006	5E	01011110
007	02	00000010
008	00	00000000
009	85	10000101
00A	00	00000000
00B	00	00000000
00C	00	00000000
00D	40	01000000
00E	00	00000000
00F	00	00000000
010	00	00000000
011	00	00000000
012	00	00000000
013	08	00001000
014	00	00000000
015	12	00010010
016	00	00000000
017	80	10000000
018	20	00100000
019	14	00010100
01A	32	00110010
01B	00	00000000
01C	00	00000000
01D	00	00000000
01E	00	00000000
01F	00	00000000
020	42	01000010
021	04	00000100
022	08	00001000
023	7E	01111110
024	00	00000000
025	C0	11000000
026	00	00000000
027	80	10000000
028	FF	11111111
029	FF	11111111
02A	FF	11111111
02B	FF	11111111
02C	FF	11111111
02D	FF	11111111
02E	FF	11111111
02F	FF	11111111
030	FF	11111111
031	FF	11111111
032	FF	11111111
033	FF	11111111
034	FF	11111111
035	FF	11111111
036	FF	11111111
037	FF	11111111
038	FF	11111111
039	FF	11111111
03A	FF	11111111
03B	FF	11111111
03C	FF	11111111
03D	FF	11111111
03E	FF	11111111
03F	FF	11111111
040	FF	11111111
041	FF	11111111
042	FF	11111111
043	FF	11111111
044	FF	11111111
045	FF	11111111
046	FF	11111111
047	FF	11111111
048	FF	11111111
049	FF	11111111
04A	FF	11111111
04B	FF	11111111
04C	FF	11111111
04D	FF	11111111
04E	FF	11111111
04F	FF	11111111
050	FF	11111111
051	FF	11111111
052	FF	11111111
053	FF	11111111
054	FF	11111111
055	FF	11111111
056	FF	11111111
057	FF	11111111
058	FF	11111111
059	FF	11111111
05A	FF	11111111
05B	FF	11111111
05C	FF	11111111
05D	FF	11111111
05E	FF	11111111
05F	FF	11111111
060	FF	11111111
061	FF	11111111
062	FF	11111111
063	FF	11111111
064	FF	11111111
065	FF	11111111
066	FF	11111111
067	FF	11111111
068	FF	11111111
069	FF	11111111
06A	FF	11111111
06B	FF	11111111
06C	FF	11111111
06D	FF	11111111
06E	FF	11111111
06F	FF	11111111
070	FF	11111111
071	FF	11111111
072	FF	11111111
073	FF	11111111
074	FF	11111111
075	FF	11111111
076	FF	11111111
077	FF	11111111
078	FF	11111111
079	FF	11111111
07A	FF	11111111
07B	FF	11111111
07C	FF	11111111
07D	FF	11111111
07E	FF	11111111
07F	FF	11111111
080	FF	11111111
081	FF	11111111
082	FF	11111111
083	FF	11111111
084	FF	11111111
085	FF	11111111
086	FF	11111111
087	FF	11111111
088	FF	11111111
089	FF	11111111
08A	FF	11111111
08B	FF	11111111
08C	FF	11111111
08D	FF	11111111
08E	FF	11111111
08F	FF	11111111
090	FF	11111111
091	FF	11111111
092	FF	11111111
093	FF	11111111
094	FF	11111111
095	FF	11111111
096	FF	11111111
097	FF	11111111
098	FF	11111111
099	FF	11111111
09A	FF	11111111
09B	FF	11111111
09C	FF	11111111
09D	FF	11111111
09E	FF	11111111
09F	FF	11111111
0A0	FF	11111111
0A1	FF	11111111
0A2	FF	11111111
0A3	FF	11111111
0A4	FF	11111111
0A5	FF	11111111
0A6	FF	11111111
0A7	FF	11111111
0A8	FF	11111111
0A9	FF	11111111
0AA	FF	11111111
0AB	FF	11111111
0AC	FF	11111111
0AD	FF	11111111
0AE	FF	11111111
0AF	FF	11111111
0B0	FF	11111111
0B1	FF	11111111
0B2	FF	11111111
0B3	FF	11111111
0B4	FF	11111111
0B5	FF	11111111
0B6	FF	11111111
0B7	FF	11111111
0B8	FF	11111111
0B9	FF	11111111
0BA	FF	11111111
0BB	FF	11111111
0BC	FF	11111111
0BD	FF	11111111
0BE	FF	11111111
0BF	FF	11111111
0C0	FF	11111111
0C1	FF	11111111
0C2	FF	11111111
0C3	FF	11111111
0C4	FF	11111111
0C5	FF	11111111
0C6	FF	11111111
0C7	FF	11111111
0C8	FF	11111111
0C9	FF	11111111
0CA	FF	11111111
0CB	FF	11111111
0CC	FF	11111111
0CD	FF	11111111
0CE	FF	11111111
0CF	FF	11111111
0D0	FF	11111111
0D1	FF	11111111
0D2	FF	11111111
0D3	FF	11111111
0D4	FF	11111111
0D5	FF	11111111
0D6	FF	11111111
0D7	FF	11111111
0D8	FF	11111111
0D9	FF	11111111
0DA	FF	11111111
0DB	FF	11111111
0DC	FF	11111111
0DD	FF	11111111
0DE	FF	11111111
0DF	FF	11111111
0E0	FF	11111111
0E1	FF	11111111
0E2	FF	11111111
0E3	FF	11111111
0E4	FF	11111111
0E5	FF	11111111
0E6	FF	11111111
0E7	FF	11111111
0E8	FF	11111111
0E9	FF	11111111
0EA	FF	11111111
0EB	FF	11111111
0EC	FF	11111111
0ED	FF	11111111
0EE	FF	11111111
0EF	FF	11111111
0F0	FF	11111111
0F1	FF	11111111
0F2	FF	11111111
0F3	FF	11111111
0F4	FF	11111111
0F5	FF	11111111
0F6	FF	11111111
0F7	FF	11111111
0F8	FF	11111111
0F9	FF	11111111
0FA	FF	11111111
0FB	FF	11111111
0FC	FF	11111111
0FD	FF	11111111
0FE	FF	11111111
0FF	FF	11111111

'DATA FILE FORMAT: <HEX ADDRESS><TAB><HEX DATA>. EVERYTHING AFTER <DATA> IS IGNORED.
'USE <'> FOR IN-LINE COMMENTING.
'DATA FILE PARSING STOPS AT FIRST BLANK LINE.

  • 0 in reply to Malik Barton57
    Intellectual 385 points
    Malik Barton,

    In our design, the EEPROM is connected to XIO3130 through SCL and SDA pins. EEPROM is not directly connected to P1020. So can P1020 load the file via XIO3130?
  • 0 in reply to Dhaivat Master
    TI__Guru 64326 points
    Dhaivat,

    Yes this is possible to write the EEPROM registers through XIO3130.
  • 0 in reply to Malik Barton57
    Intellectual 385 points

    Malik Barton,

    Please see attached text file. We have generated the file according to the default configuration.
    Please give us your feedback.

    Fullscreen XIO3130.txt Download 
    000	4C	01000111
001	00	00000000
002	24	00100100
003	00	00000000
004	00	00000000
005	00	00000000
006	00	00000000
007	00	00000000
008	00	00000000
009	00	00000000
00A	00	00000000
00B	00	00000000
00C	00	00000000
00D	00	00000000
00E	00	00000000
00F	00	00000000
010	00	00000000
011	00	00000000
012	00	00000000
013	00	00000000
014	01	00000001
015	00	00000000
016	00	00000000
017	00	00000000
018	00	00000000
019	14	00010100
01A	32	00110010
01B	02	00000010
01C	00	00000000
01D	00	00000000
01E	00	00000000
01F	00	00000000
020	FF	11111111
021	FF	11111111
022	FF	11111111
023	FF	11111111
024	00	00000000
025	24	00100100
026	3F	00111111
027	04	00000100
028	01	00000001
029	00	00000000
02A	01	00000001
02B	00	00000000
02C	00	00000000
02D	00	00000000
02E	00	00000000
02F	14	00010100
030	32	00110010
031	10	00010000
032	60	01100000
033	1A	00011010
034	00	00000000
035	00	00000000
036	02	00000010
037	00	00000000
038	01	00000001
039	00	00000000
03A	00	00000000
03B	00	00000000
03C	00	00000000
03D	14	00010100
03E	32	00110010
03F	10	00010000
040	60	01100000
041	1A	00011010
042	00	00000000
043	00	00000000
044	02	00000010
045	00	00000000
046	01	00000001
047	00	00000000
048	00	00000000
049	00	00000000
04A	00	00000000
04B	14	00010100
04C	32	00110010
04D	10	00010000
04E	60	01100000
04F	1A	00011010
050	00	00000000
051	00	00000000

  • 0 in reply to Dhaivat Master
    TI__Guru 64326 points
    Dhaivat,

    This looks to be the correct and matchs the datasheet.
  • 0 in reply to Malik Barton57
    Intellectual 385 points
    Malik Barton,

    Thank you. I have one more question before I close this query. Can processor (in this case P1020) drive the GPIOs of XIO3130 directly through software application?
  • 0 in reply to Dhaivat Master
    TI__Guru 64326 points

    Dhaivat,

    If you are asking if the processor can drive the GPIOs high/low/tri-state when the GPIOs are in output mode however when swithcing the GPIOs from Input mode to Output mode a reset using GRST and PERST will need to occur so that XIO3130 can re-read the EEPROM.

  • 0 in reply to Malik Barton57
    Intellectual 385 points
    Malik Barton,

    Yes, can processor drive the GPIO high/low/tri-state?
  • 0 in reply to Dhaivat Master
    TI__Guru 64326 points
    Dhaivat,

    Yes, processor can drive GPIOs can be high/low not tri-state, sorry for my misleading post. GPIOs must be set to General Purpose Output
    and controlled through PCIE_GPIOX_DATA registers.
  • 0 in reply to Malik Barton57
    Intellectual 385 points
    Malik Barton,

    Thank you very much for your help.