Date: Sun, 1 Feb 2009 20:32:25 +0800 From: Henry Hu <henry.hu.sh@gmail.com> To: Alexander Motin <mav@freebsd.org> Cc: freebsd-mobile@freebsd.org Subject: Re: Problem about the new sdhci driver Message-ID: <53a1e0710902010432j49111ecey8d9a93acfbe3c64d@mail.gmail.com> In-Reply-To: <49857482.5080508@FreeBSD.org> References: <53a1e0710901311949x3b853404oe89cf2ae9a0903f7@mail.gmail.com> <49857482.5080508@FreeBSD.org>
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After doing more experiments, I found the cause:
hw.pci.do_power_resume=3
If I set it to 0 and load the driver, it works well with and without the card.
If I set it to 3 and load the driver, then
1. If the card is present, then it would detect the card and the disk
shows up. If I remove the card and insert it again, it cannot detect
it again. And if I unload the driver now and reload it with the card,
it cannot detect the card and it cannot detect card insertion /
removal.
2. If the card is not present, then it cannot detect the card, and if
I remove the card and insert it again, nothing happens.
The 0x01fa0000 state is normal: I found that the detection of
write-protection is independent from card detection. If I pull the
card out completely, the present register is 0x01f20000. If I pull the
card out half-way, the present register is 0x01fa000, the
write-protection bit is 1 and the card-present bit is 0...
So the problem is about power states, not the driver, and no patch is
needed. Since I rarely use the card reader when the laptop is using
battery, I decided to remove it from sysctl .conf ....
Thanks for the help. Good driver!
Cheers,
Henry
On Sun, Feb 1, 2009 at 6:08 PM, Alexander Motin <mav@freebsd.org> wrote:
> Henry Hu wrote:
>>
>> I'm using FreeBSD 7-STABLE, with sdhci driver
>> sdhci.20081029.tgz
>> mmc.20081029.tgz
>>
>> I've found that if I load sdhci driver with card inserted, everything
>> works fine.
>> But if I load sdhci driver first, and then insert card, the card is
>> not detected.Additionally, there is no interrupt.
>> After I've load sdhci driver without card, the controller seems to be
>> in a problematic state. The register dump outputed when the driver
>> loaded showed that Present is 0x01f20000 which is correct since the
>> card is not inserted then. But cards is not detected.
>> Even if I unload the driver and reload with card inserted, the card
>> still cannot be detected, and there's no interrupt. But the Present
>> register changed to 0x01fa0000 which is strange.
>>
>> So I guess there's something wrong with the driver when the card is not
>> present.
>>
>> sdhci0: <RICOH R5C822 SD> mem 0xf0401000-0xf04010ff irq 18 at device 9.1
>> on pci5
>> sdhci0-slot0: 33MHz 4bits 3.3V DMA
>> sdhci0-slot0: ============== REGISTER DUMP ==============
>> sdhci0-slot0: Sys addr: 0x00000000 | Version: 0x00000200
>> sdhci0-slot0: Blk size: 0x00000000 | Blk cnt: 0x00000000
>> sdhci0-slot0: Argument: 0x00000000 | Trn mode: 0x00000000
>> sdhci0-slot0: Present: 0x01f20000 | Host ctl: 0x00000000
>> sdhci0-slot0: Power: 0x00000000 | Blk gap: 0x00000000
>> sdhci0-slot0: Wake-up: 0x00000000 | Clock: 0x00000000
>> sdhci0-slot0: Timeout: 0x0000000c | Int stat: 0x00000000
>> sdhci0-slot0: Int enab: 0x01ff00fb | Sig enab: 0x01ff00fb
>> sdhci0-slot0: AC12 err: 0x00000000 | Slot int: 0x00000000
>> sdhci0-slot0: Caps: 0x01c021a1 | Max curr: 0x00000040
>> sdhci0-slot0: ===========================================
>
> Try this patch please:
> --- sdhci.c.prev 2009-01-29 00:53:41.000000000 +0200
> +++ sdhci.c 2009-02-01 11:58:42.000000000 +0200
> @@ -82,7 +82,8 @@ static const struct sdhci_device {
> u_int quirks;
> } sdhci_devices[] = {
> { 0x08221180, 0xffff, "RICOH R5C822 SD",
> - SDHCI_QUIRK_FORCE_DMA },
> + SDHCI_QUIRK_FORCE_DMA |
> + SDHCI_QUIRK_NO_CARD_NO_RESET },
> { 0x8034104c, 0xffff, "TI XX21/XX11 SD",
> SDHCI_QUIRK_FORCE_DMA },
> { 0x05501524, 0xffff, "ENE CB712 SD",
>
>
> Could everybody having this controller send me pciconf and Version register
> from their controller and report me is this bug present on their system? I
> would like to collect some statistics.
>
> --
> Alexander Motin
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