Date: Thu, 10 Jan 2013 12:12:50 +0100 From: Andreas Longwitz <longwitz@incore.de> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-isdn@freebsd.org Subject: Re: ISDN4BSD (HPS version) is going into ports Message-ID: <50EEA232.2030403@incore.de> In-Reply-To: <201301100813.33186.hselasky@c2i.net> References: <509E87EF.9070607@incore.de> <201301091015.39124.hselasky@c2i.net> <50EDDDD7.2000006@incore.de> <201301100813.33186.hselasky@c2i.net>
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Hans Petter Selasky wrote:
1. Problem: "last byte" on incomig D-channel frames:
> Can you add prints to track the "sc->sc_d1r_fifo_keep_len" and "sc-
> sc_d1r_fifo_strip_len" variables?
Yes. With the following two prints
avm_pci_chip_read(sc,(f->fm.h.Zdata),ptr,len);
sc->sc_d1r_fifo_keep_len -= len;
if (bootverbose == 2) {
IHFC_ERR("len=%d, sc->sc_d1r_fifo_keep/strip_len=%d/%d\n", len,
sc->sc_d1r_fifo_keep_len, sc->sc_d1r_fifo_strip_len);
}
and
if (temp != 0) {
sc->sc_d1r_fifo_strip_len = 1;
sc->sc_d1r_fifo_keep_len = temp - 1;
} else {
sc->sc_d1r_fifo_strip_len = 0;
sc->sc_d1r_fifo_keep_len = 0;
}
if (bootverbose == 2) {
IHFC_ERR("temp=%d, sc->sc_d1r_fifo_keep/strip_len=%d/%d\n", temp,
sc->sc_d1r_fifo_keep_len, sc->sc_d1r_fifo_strip_len);
}
I got
avm_pci_chip_status_read: temp=5, sc->sc_d1r_fifo_keep/strip_len=4/1
avm_pci_fifo_read: len=5, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=9, sc->sc_d1r_fifo_keep/strip_len=8/1
avm_pci_fifo_read: len=9, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=4, sc->sc_d1r_fifo_keep/strip_len=3/1
avm_pci_fifo_read: len=4, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=5, sc->sc_d1r_fifo_keep/strip_len=4/1
avm_pci_fifo_read: len=5, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=5, sc->sc_d1r_fifo_keep/strip_len=4/1
avm_pci_fifo_read: len=5, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=13, sc->sc_d1r_fifo_keep/strip_len=12/1
avm_pci_fifo_read: len=13, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=5, sc->sc_d1r_fifo_keep/strip_len=4/1
avm_pci_fifo_read: len=5, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=5, sc->sc_d1r_fifo_keep/strip_len=4/1
avm_pci_fifo_read: len=5, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=16, sc->sc_d1r_fifo_keep/strip_len=15/1
avm_pci_fifo_read: len=16, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=12, sc->sc_d1r_fifo_keep/strip_len=11/1
avm_pci_fifo_read: len=12, sc->sc_d1r_fifo_keep/strip_len=255/1
avm_pci_chip_status_read: temp=29, sc->sc_d1r_fifo_keep/strip_len=28/1
avm_pci_fifo_read: len=29, sc->sc_d1r_fifo_keep/strip_len=255/1
> i4b_filter.h is not the right place to do this.
I agree, should be done in i4b_avm_pci.h.
2. Problem: B-channel does not work.
> Possibly some FIFO status bits are not cleared like they should, and then the
> stream stops.
> I know that some chips have a filter which stops the stream on HDLC idle
> bytes.
> It might also be worth to try dumping the register from which the HSCX_LEN
> comes from, if it is 2x32=64 bytes, because I mask that value with 0x1F.
I did not find a masking with 0x1F, or do you mean 0x3F (typing error) ?
I will do more work on B-channel analysis. It would be very helpful for
me, if you can give an answer to the following question:
After the B-channel is established, the other side starts sending the
following data packet (from isdndecode of the other side):
-- TE->NT - unit:00 frame:351318 - time:10.01 11:34:12.595168 -
length:18 ----
B01:000 ff 03 c0 21 01 d8 00 0e 05 06 31 13 cd b3 03 04
B01:010 c0 23
What should we read in avm_pci_b_status_read() with
if(temp == 0) temp = 32;
/* read FIFO */
bus_space_read_multi_4(t, h, offset + HSCX_FIFO,
(u_int32_t *)sc->sc_buffer, (temp + 3) / 4);
if everything works correct and how many interrupts can we expect for
the message of 18 bytes ?
--
Dr. Andreas Longwitz
Data Service GmbH
Beethovenstr. 2A
23617 Stockelsdorf
Amtsgericht Lübeck, HRB 318 BS
Geschäftsführer: Wilfried Paepcke, Dr. Andreas Longwitz, Josef Flatau
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