[Letux-kernel] [Gta04-owner] no wifi today (cannot load helper firmware)

[Andreas Kemnade]

Hi,

On Thu, 2016-05-05 at 19:28 +0200, H. Nikolaus Schaller wrote: 
> Hi,
> 
> >>> 
> >> Interesting is also EILSEQ 
> >> in omap_hsmmc.c.
> >> 
> >> I tried also with libertas_tf.
> >> 
> > Hmm, I tried letux-4.6rc6.
> > No changes.
> 
> It did not work as well on my GTA04A3 which I use for kernel tests.
> 
> > I tried to change the bus width to 1bit via dtb.
> > Now I get further:
> > [  320.668182] libertas leave: __lbs_cleanup_and_insert_cmd()
> > [  320.674926] libertas enter: __lbs_cleanup_and_insert_cmd()
> > [  320.680725] libertas leave: __lbs_cleanup_and_insert_cmd()
> > [  320.687469] libertas leave: lbs_allocate_cmd_buffer(), ret 0
> > [  320.693634] libertas leave: lbs_init_adapter(), ret 0
> > [  320.699920] libertas thread: Starting main thread...
> > [  320.708709] libertas enter: lbs_thread()
> > [  320.713165] libertas thread: 1: currenttxskb   (null), dnld_sent 0
> > [  320.720611] libertas thread: sleeping, connect_status 1, psmode 0,
> > psstate 0
> > [  320.728240] libertas leave: lbs_add_card(), priv dd540600
> > [  320.735382] libertas enter: if_sdio_prog_firmware()
> > [  320.740997] libertas sdio: firmware status = 0x0
> > [  320.746643] libertas sdio: scratch ret = 0
> > [  320.750976] libertas fw: Starting async firmware load
> > [  320.757080] libertas fw: Requesting libertas/sd8686_v9_helper.bin
> > [  320.763702] libertas leave: if_sdio_prog_firmware(), ret 0
> > [  320.770294] libertas leave: if_sdio_probe(), ret 0
> > [  320.779510] libertas fw: Requesting libertas/sd8686_v9.bin
> > [  320.787231] libertas fw: firmware load complete, code 0
> > [  320.792999] libertas enter: if_sdio_prog_helper()
> > [  320.894561] libertas sdio: waiting for helper to boot...
> > [  320.900482] libertas leave: if_sdio_prog_helper(), ret 0
> > [  320.907012] libertas sdio: Helper firmware loaded
> > [  320.912170] libertas enter: if_sdio_prog_real()
> > [  321.251220] libertas sdio: waiting for firmware to boot...
> > [  321.338592] libertas leave: if_sdio_prog_real(), ret 0
> > [  321.349517] libertas sdio: Firmware loaded
> 
> ok, that looks better.
> 
> > [  321.371093] libertas enter: lbs_start_card()
> > [  321.375610] libertas enter: lbs_setup_firmware()
> > [  321.389312] libertas enter: lbs_update_hw_spec()
> > [  321.394409] libertas enter: __lbs_cmd()
> > [  321.399505] libertas enter: __lbs_cmd_async()
> > [  321.404296] libertas enter: lbs_get_free_cmd_node()
> > [  321.410614] libertas leave: lbs_get_free_cmd_node()
> > [  321.415924] libertas host: PREP_CMD: command 0x0003
> > [  321.421997] libertas enter: lbs_queue_cmd()
> > [  321.427307] libertas host: QUEUE_CMD: inserted command 0x0003 into
> > cmdpendingq
> > [  321.435028] libertas leave: lbs_queue_cmd()
> > [  321.440460] libertas thread: 2: currenttxskb   (null), dnld_send 0
> > [  321.447723] libertas leave: __lbs_cmd_async(), ret de728400
> > [  321.453796] libertas thread: 3: currenttxskb   (null), dnld_sent 0
> > [  321.461425] libertas thread: 4: currenttxskb   (null), dnld_sent 0
> > [  321.468719] libertas enter: lbs_execute_next_command()
> > [  321.474273] libertas host: EXEC_NEXT_CMD: sending command 0x0003
> > [  321.483001] libertas enter: lbs_submit_command()
> > [  321.489105] libertas cmd: DNLD_CMD: command 0x0003, seq 1, size 46
> > [  321.495788] libertas DNLD_CMD: 03 00 2e 00 01 00 00 00 00 00 00 00 00
> > 00 00 00 
> > [  321.504516] libertas DNLD_CMD: ff ff ff ff ff ff 00 00 00 00 00 00 00
> > 00 00 00 
> > [  321.513092] libertas DNLD_CMD: 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 
> > [  321.521087] libertas enter: if_sdio_host_to_card(type 1, bytes 46)
> > [  321.528594] libertas enter: if_sdio_host_to_card_worker()
> > [  321.534454] libertas leave: if_sdio_host_to_card(), ret 0
> > [  321.534484] libertas leave: lbs_submit_command()
> > [  321.534484] libertas leave: lbs_execute_next_command()
> > [  321.534484] libertas thread: 1: currenttxskb   (null), dnld_sent 2
> > [  321.534515] libertas thread: sleeping, connect_status 1, psmode 0,
> > psstate 0
> > [  321.566162] libertas leave: if_sdio_host_to_card_worker()
> 
> Ok!
> 

Not ok, I just pasted not enough. The command timed out.
Probably due to the not-working sdio-irq.

> > 
> > 
> > 
> > reverting 9dc0754ccfc1aaa2b8cd38b2d1579ac902b8bbc0
> > than makes wifi work at least slowly and with much current consumption.
> 
> Hm. As far as I see that patch doesn't do much except unconditionally enabling
> 
> mmc->caps |= MMC_CAP_SDIO_IRQ
> 
> and managing power while interrupts are enabled/disabled.
> 
> > 
> > I am still wondering whether this is a hardware error on my gta04
> > since I do not find any kernel which works now.
> 
> I am also not sure if this is hw or sw.
> 
Hmm, AFAIK my gta04 was not vapor-phase soldered and I think also
reworked. And your gta04a3 probably also not. Maybe the soldering
quality is not so well. And I also cannot remember when I have last seen
a working clock after battery removal. Also tested with several kernels.
So the chances are high that my gta04 has a hw problem.

> > 
> > Both measures (1bit mode
> > and no sdio-irq reduce the pins used. So if some of them have a
> > problem...
> 
> Well, I think in 1-bit mode there is still CLK, CMD and D0.
> So we only leave out D1, D2, D3 and D2 is used as SDIO-irq.

> So essentially you cut only be 50%.
> 
> But: is it is possible to damage the level shifter D2 line by incorrectly
> controlling the sdio-irq? I don't know and assume that it is not possible.
> 
At least it seems not to be so easily possible. I have used sdio-irq
most of the time. Even in the goldelico 2.6.32-hwvalidation kernel
sdio-irq was enabled. Or should it be something specific to the dt-based
kernels?
EILSEQ was in relation to CRC errors...

The combination 1bit-SDIO + SDIO-irq has some special code in the
libertas driver and I do not know what the status of that code is.


> The SN74AVCA406L is explicitly designed for that purpose of interfacing
> sdio slots to the OMAP3... And I have checked that the output current limit
> is +/- 50 mA. But I don't think that there will flow that much current if both
> the WIFi module and the SN74AVCA406L are driving a data line.
> 
If there is  mess with that line, then we should have always problems.
Hmm, can we do some IR temperature measurement on that SN74AVCA406L on
a device with working wifi:

1. download of 100KB/s, wifi with sdio-irq, iwconfig power off
2. download of 100KB/s, wifi without sdio-irq, iwconfig power off

same with 3.7  (which I use most the time)?

> So it remains a mystery why it does no longer work even with older kernel
> and kernel binaries.
> 
> > 
> > Is there any hw with libertas available so that I might at least
> > upstream the libertas stuff?
> 
> Yes, there will be some devices available during our hacking weekend.
> I hope with working wifi chip...
> 
The letux 3704?

Regards,
Andreas