* [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card @ 2014-01-28 8:24 Jaehoon Chung 2014-01-28 10:32 ` Ulf Hansson 0 siblings, 1 reply; 5+ messages in thread From: Jaehoon Chung @ 2014-01-28 8:24 UTC (permalink / raw) To: linux-mmc@vger.kernel.org Cc: Chris Ball, Arnd Bergmann, Ulf Hansson, Seungwon Jeon Some SoC is used the broken card-detection. And it should be also used the "non-removable". Even if card is "non-removable", it didn't always use the cd-gpio. If it's used only broken-cd, then card-detect interrupt is polling. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> --- drivers/mmc/core/core.c | 4 ++-- drivers/mmc/core/host.c | 6 +++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 098374b..df732aa 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2460,8 +2460,8 @@ void mmc_rescan(struct work_struct *work) */ mmc_bus_put(host); - if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && - host->ops->get_cd(host) == 0) { + if (host->ops->get_cd && host->ops->get_cd(host) == 0 && + !(host->caps & MMC_CAP_NONREMOVABLE)) { mmc_claim_host(host); mmc_power_off(host); mmc_release_host(host); diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 4b81c93..52a64fe 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -356,6 +356,9 @@ int mmc_of_parse(struct mmc_host *host) * configuration is performed. */ + if (of_find_property(np, "broken-cd", &len)) + host->caps |= MMC_CAP_NEEDS_POLL; + /* Parse Card Detection */ if (of_find_property(np, "non-removable", &len)) { host->caps |= MMC_CAP_NONREMOVABLE; @@ -364,9 +367,6 @@ int mmc_of_parse(struct mmc_host *host) explicit_inv_cd = of_property_read_bool(np, "cd-inverted"); - if (of_find_property(np, "broken-cd", &len)) - host->caps |= MMC_CAP_NEEDS_POLL; - gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags); if (gpio == -EPROBE_DEFER) return gpio; -- 1.7.9.5 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card 2014-01-28 8:24 [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card Jaehoon Chung @ 2014-01-28 10:32 ` Ulf Hansson 2014-01-28 10:51 ` Jaehoon Chung 0 siblings, 1 reply; 5+ messages in thread From: Ulf Hansson @ 2014-01-28 10:32 UTC (permalink / raw) To: Jaehoon Chung Cc: linux-mmc@vger.kernel.org, Chris Ball, Arnd Bergmann, Seungwon Jeon On 28 January 2014 09:24, Jaehoon Chung <jh80.chung@samsung.com> wrote: > Some SoC is used the broken card-detection. > And it should be also used the "non-removable". > Even if card is "non-removable", it didn't always use the cd-gpio. > > If it's used only broken-cd, then card-detect interrupt is polling. > > Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> > --- > drivers/mmc/core/core.c | 4 ++-- > drivers/mmc/core/host.c | 6 +++--- > 2 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c > index 098374b..df732aa 100644 > --- a/drivers/mmc/core/core.c > +++ b/drivers/mmc/core/core.c > @@ -2460,8 +2460,8 @@ void mmc_rescan(struct work_struct *work) > */ > mmc_bus_put(host); > > - if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && > - host->ops->get_cd(host) == 0) { > + if (host->ops->get_cd && host->ops->get_cd(host) == 0 && > + !(host->caps & MMC_CAP_NONREMOVABLE)) { What's the difference here? > mmc_claim_host(host); > mmc_power_off(host); > mmc_release_host(host); > diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c > index 4b81c93..52a64fe 100644 > --- a/drivers/mmc/core/host.c > +++ b/drivers/mmc/core/host.c > @@ -356,6 +356,9 @@ int mmc_of_parse(struct mmc_host *host) > * configuration is performed. > */ > > + if (of_find_property(np, "broken-cd", &len)) > + host->caps |= MMC_CAP_NEEDS_POLL; > + No. There are no meaning in using MMC_CAP_NEEDS_POLL in conjunction with MMC_CAP_NONREMOVABLE. Using MMC_CAP_NONREMOVABLE, will allow mmc_rescan to detect a card - only for one iteration. Thus MMC_CAP_NEEDS_POLL will have no effect. Kind regards Uffe > /* Parse Card Detection */ > if (of_find_property(np, "non-removable", &len)) { > host->caps |= MMC_CAP_NONREMOVABLE; > @@ -364,9 +367,6 @@ int mmc_of_parse(struct mmc_host *host) > > explicit_inv_cd = of_property_read_bool(np, "cd-inverted"); > > - if (of_find_property(np, "broken-cd", &len)) > - host->caps |= MMC_CAP_NEEDS_POLL; > - > gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags); > if (gpio == -EPROBE_DEFER) > return gpio; > -- > 1.7.9.5 ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card 2014-01-28 10:32 ` Ulf Hansson @ 2014-01-28 10:51 ` Jaehoon Chung 2014-01-28 11:21 ` Ulf Hansson 0 siblings, 1 reply; 5+ messages in thread From: Jaehoon Chung @ 2014-01-28 10:51 UTC (permalink / raw) To: Ulf Hansson, Jaehoon Chung Cc: linux-mmc@vger.kernel.org, Chris Ball, Arnd Bergmann, Seungwon Jeon Dear, Ulf. On 01/28/2014 07:32 PM, Ulf Hansson wrote: > On 28 January 2014 09:24, Jaehoon Chung <jh80.chung@samsung.com> wrote: >> Some SoC is used the broken card-detection. >> And it should be also used the "non-removable". >> Even if card is "non-removable", it didn't always use the cd-gpio. >> >> If it's used only broken-cd, then card-detect interrupt is polling. >> >> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> >> --- >> drivers/mmc/core/core.c | 4 ++-- >> drivers/mmc/core/host.c | 6 +++--- >> 2 files changed, 5 insertions(+), 5 deletions(-) >> >> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c >> index 098374b..df732aa 100644 >> --- a/drivers/mmc/core/core.c >> +++ b/drivers/mmc/core/core.c >> @@ -2460,8 +2460,8 @@ void mmc_rescan(struct work_struct *work) >> */ >> mmc_bus_put(host); >> >> - if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && >> - host->ops->get_cd(host) == 0) { >> + if (host->ops->get_cd && host->ops->get_cd(host) == 0 && >> + !(host->caps & MMC_CAP_NONREMOVABLE)) { > > What's the difference here? eMMC is non-removable card. So i added the "non-removable" property at dt file. Then first checking !(host->caps & MMC_CAP_NONREMOVABLE), and didn't call get_cd(). In case of dw-mmc.c, after calling get_cd(), CARD_PRESENT bit is set at dw_mci_get_cd(). I didn't check other driver how it work. If you didn't this change, i will change the dw-mmc controller. > >> mmc_claim_host(host); >> mmc_power_off(host); >> mmc_release_host(host); >> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c >> index 4b81c93..52a64fe 100644 >> --- a/drivers/mmc/core/host.c >> +++ b/drivers/mmc/core/host.c >> @@ -356,6 +356,9 @@ int mmc_of_parse(struct mmc_host *host) >> * configuration is performed. >> */ >> >> + if (of_find_property(np, "broken-cd", &len)) >> + host->caps |= MMC_CAP_NEEDS_POLL; >> + > > No. There are no meaning in using MMC_CAP_NEEDS_POLL in conjunction > with MMC_CAP_NONREMOVABLE. > > Using MMC_CAP_NONREMOVABLE, will allow mmc_rescan to detect a card - > only for one iteration. Thus MMC_CAP_NEEDS_POLL will have no effect. Sorry. You're right. It's no meaning. I will maintain the original code. Best Regards, Jaehoon Chung > > Kind regards > Uffe > > >> /* Parse Card Detection */ >> if (of_find_property(np, "non-removable", &len)) { >> host->caps |= MMC_CAP_NONREMOVABLE; >> @@ -364,9 +367,6 @@ int mmc_of_parse(struct mmc_host *host) >> >> explicit_inv_cd = of_property_read_bool(np, "cd-inverted"); >> >> - if (of_find_property(np, "broken-cd", &len)) >> - host->caps |= MMC_CAP_NEEDS_POLL; >> - >> gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags); >> if (gpio == -EPROBE_DEFER) >> return gpio; >> -- >> 1.7.9.5 > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card 2014-01-28 10:51 ` Jaehoon Chung @ 2014-01-28 11:21 ` Ulf Hansson 2014-01-28 23:56 ` Jaehoon Chung 0 siblings, 1 reply; 5+ messages in thread From: Ulf Hansson @ 2014-01-28 11:21 UTC (permalink / raw) To: Jaehoon Chung Cc: linux-mmc@vger.kernel.org, Chris Ball, Arnd Bergmann, Seungwon Jeon On 28 January 2014 11:51, Jaehoon Chung <jh80.chung@samsung.com> wrote: > Dear, Ulf. > > On 01/28/2014 07:32 PM, Ulf Hansson wrote: >> On 28 January 2014 09:24, Jaehoon Chung <jh80.chung@samsung.com> wrote: >>> Some SoC is used the broken card-detection. >>> And it should be also used the "non-removable". >>> Even if card is "non-removable", it didn't always use the cd-gpio. >>> >>> If it's used only broken-cd, then card-detect interrupt is polling. >>> >>> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> >>> --- >>> drivers/mmc/core/core.c | 4 ++-- >>> drivers/mmc/core/host.c | 6 +++--- >>> 2 files changed, 5 insertions(+), 5 deletions(-) >>> >>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c >>> index 098374b..df732aa 100644 >>> --- a/drivers/mmc/core/core.c >>> +++ b/drivers/mmc/core/core.c >>> @@ -2460,8 +2460,8 @@ void mmc_rescan(struct work_struct *work) >>> */ >>> mmc_bus_put(host); >>> >>> - if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && >>> - host->ops->get_cd(host) == 0) { >>> + if (host->ops->get_cd && host->ops->get_cd(host) == 0 && >>> + !(host->caps & MMC_CAP_NONREMOVABLE)) { >> >> What's the difference here? > > eMMC is non-removable card. So i added the "non-removable" property at dt file. > Then first checking !(host->caps & MMC_CAP_NONREMOVABLE), and didn't call get_cd(). > In case of dw-mmc.c, after calling get_cd(), CARD_PRESENT bit is set at dw_mci_get_cd(). > I didn't check other driver how it work. > If you didn't this change, i will change the dw-mmc controller. Thanks for the clarification. I would then suggest you to change in dw-mmc instead, since I think using the MMC_CAP_NONREMOVABLE flag, indicates that the .get_cd callback is not needed. Kind regards Ulf Hansson > >> >>> mmc_claim_host(host); >>> mmc_power_off(host); >>> mmc_release_host(host); >>> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c >>> index 4b81c93..52a64fe 100644 >>> --- a/drivers/mmc/core/host.c >>> +++ b/drivers/mmc/core/host.c >>> @@ -356,6 +356,9 @@ int mmc_of_parse(struct mmc_host *host) >>> * configuration is performed. >>> */ >>> >>> + if (of_find_property(np, "broken-cd", &len)) >>> + host->caps |= MMC_CAP_NEEDS_POLL; >>> + >> >> No. There are no meaning in using MMC_CAP_NEEDS_POLL in conjunction >> with MMC_CAP_NONREMOVABLE. >> >> Using MMC_CAP_NONREMOVABLE, will allow mmc_rescan to detect a card - >> only for one iteration. Thus MMC_CAP_NEEDS_POLL will have no effect. > > Sorry. You're right. It's no meaning. I will maintain the original code. > > Best Regards, > Jaehoon Chung >> >> Kind regards >> Uffe >> >> >>> /* Parse Card Detection */ >>> if (of_find_property(np, "non-removable", &len)) { >>> host->caps |= MMC_CAP_NONREMOVABLE; >>> @@ -364,9 +367,6 @@ int mmc_of_parse(struct mmc_host *host) >>> >>> explicit_inv_cd = of_property_read_bool(np, "cd-inverted"); >>> >>> - if (of_find_property(np, "broken-cd", &len)) >>> - host->caps |= MMC_CAP_NEEDS_POLL; >>> - >>> gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags); >>> if (gpio == -EPROBE_DEFER) >>> return gpio; >>> -- >>> 1.7.9.5 >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card 2014-01-28 11:21 ` Ulf Hansson @ 2014-01-28 23:56 ` Jaehoon Chung 0 siblings, 0 replies; 5+ messages in thread From: Jaehoon Chung @ 2014-01-28 23:56 UTC (permalink / raw) To: Ulf Hansson Cc: linux-mmc@vger.kernel.org, Chris Ball, Arnd Bergmann, Seungwon Jeon On 01/28/2014 08:21 PM, Ulf Hansson wrote: > On 28 January 2014 11:51, Jaehoon Chung <jh80.chung@samsung.com> wrote: >> Dear, Ulf. >> >> On 01/28/2014 07:32 PM, Ulf Hansson wrote: >>> On 28 January 2014 09:24, Jaehoon Chung <jh80.chung@samsung.com> wrote: >>>> Some SoC is used the broken card-detection. >>>> And it should be also used the "non-removable". >>>> Even if card is "non-removable", it didn't always use the cd-gpio. >>>> >>>> If it's used only broken-cd, then card-detect interrupt is polling. >>>> >>>> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> >>>> --- >>>> drivers/mmc/core/core.c | 4 ++-- >>>> drivers/mmc/core/host.c | 6 +++--- >>>> 2 files changed, 5 insertions(+), 5 deletions(-) >>>> >>>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c >>>> index 098374b..df732aa 100644 >>>> --- a/drivers/mmc/core/core.c >>>> +++ b/drivers/mmc/core/core.c >>>> @@ -2460,8 +2460,8 @@ void mmc_rescan(struct work_struct *work) >>>> */ >>>> mmc_bus_put(host); >>>> >>>> - if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && >>>> - host->ops->get_cd(host) == 0) { >>>> + if (host->ops->get_cd && host->ops->get_cd(host) == 0 && >>>> + !(host->caps & MMC_CAP_NONREMOVABLE)) { >>> >>> What's the difference here? >> >> eMMC is non-removable card. So i added the "non-removable" property at dt file. >> Then first checking !(host->caps & MMC_CAP_NONREMOVABLE), and didn't call get_cd(). >> In case of dw-mmc.c, after calling get_cd(), CARD_PRESENT bit is set at dw_mci_get_cd(). >> I didn't check other driver how it work. >> If you didn't this change, i will change the dw-mmc controller. > > Thanks for the clarification. > > I would then suggest you to change in dw-mmc instead, since I think > using the MMC_CAP_NONREMOVABLE flag, indicates that the .get_cd > callback is not needed. It's reasonable. I will consider to change this into dw_mmc.c. Best Regards, Jaehoon Chung > > Kind regards > Ulf Hansson > >> >>> >>>> mmc_claim_host(host); >>>> mmc_power_off(host); >>>> mmc_release_host(host); >>>> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c >>>> index 4b81c93..52a64fe 100644 >>>> --- a/drivers/mmc/core/host.c >>>> +++ b/drivers/mmc/core/host.c >>>> @@ -356,6 +356,9 @@ int mmc_of_parse(struct mmc_host *host) >>>> * configuration is performed. >>>> */ >>>> >>>> + if (of_find_property(np, "broken-cd", &len)) >>>> + host->caps |= MMC_CAP_NEEDS_POLL; >>>> + >>> >>> No. There are no meaning in using MMC_CAP_NEEDS_POLL in conjunction >>> with MMC_CAP_NONREMOVABLE. >>> >>> Using MMC_CAP_NONREMOVABLE, will allow mmc_rescan to detect a card - >>> only for one iteration. Thus MMC_CAP_NEEDS_POLL will have no effect. >> >> Sorry. You're right. It's no meaning. I will maintain the original code. >> >> Best Regards, >> Jaehoon Chung >>> >>> Kind regards >>> Uffe >>> >>> >>>> /* Parse Card Detection */ >>>> if (of_find_property(np, "non-removable", &len)) { >>>> host->caps |= MMC_CAP_NONREMOVABLE; >>>> @@ -364,9 +367,6 @@ int mmc_of_parse(struct mmc_host *host) >>>> >>>> explicit_inv_cd = of_property_read_bool(np, "cd-inverted"); >>>> >>>> - if (of_find_property(np, "broken-cd", &len)) >>>> - host->caps |= MMC_CAP_NEEDS_POLL; >>>> - >>>> gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags); >>>> if (gpio == -EPROBE_DEFER) >>>> return gpio; >>>> -- >>>> 1.7.9.5 >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> > ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-01-28 23:55 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-01-28 8:24 [PATCH v2 8/8] mmc: core: use the broken-cd for non-removable card Jaehoon Chung 2014-01-28 10:32 ` Ulf Hansson 2014-01-28 10:51 ` Jaehoon Chung 2014-01-28 11:21 ` Ulf Hansson 2014-01-28 23:56 ` Jaehoon Chung
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