linux-kernel - Re: [PATCH V6 09/24] mmc: sdhci-uhs2: dump UHS-II registers

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Date:   Fri, 24 Feb 2023 18:22:37 +0800
From:   Victor Shih <victorshihgli@...il.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     ulf.hansson@...aro.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, benchuanggli@...il.com,
        HL.Liu@...esyslogic.com.tw, Greg.tu@...esyslogic.com.tw,
        takahiro.akashi@...aro.org, dlunev@...omium.org,
        Victor Shih <victor.shih@...esyslogic.com.tw>,
        Ben Chuang <ben.chuang@...esyslogic.com.tw>
Subject: Re: [PATCH V6 09/24] mmc: sdhci-uhs2: dump UHS-II registers

Hi, Adrian

On Fri, Jan 6, 2023 at 5:26 AM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> On 13/12/22 11:00, Victor Shih wrote:
> > Dump UHS-II specific registers, if available, in sdhci_dumpregs()
> > for informative/debugging use.
> >
> > Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
> > Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
> > ---
> >  drivers/mmc/host/sdhci-uhs2.c | 30 ++++++++++++++++++++++++++++++
> >  drivers/mmc/host/sdhci-uhs2.h |  4 ++++
> >  drivers/mmc/host/sdhci.c      |  3 +++
> >  drivers/mmc/host/sdhci.h      |  1 +
> >  4 files changed, 38 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> > index 8e15bd0dadee..7ea15f06fa99 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.c
> > +++ b/drivers/mmc/host/sdhci-uhs2.c
> > @@ -18,6 +18,36 @@
> >  #define DRIVER_NAME "sdhci_uhs2"
> >  #define DBG(f, x...) \
> >       pr_debug(DRIVER_NAME " [%s()]: " f, __func__, ## x)
> > +#define SDHCI_UHS2_DUMP(f, x...) \
> > +     pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
> > +
> > +void sdhci_uhs2_dump_regs(struct sdhci_host *host)
> > +{
> > +     if (!(host->mmc->flags & MMC_UHS2_SUPPORT))
>
> Could make use of sdhci_uhs2_mode()
>

I will update it in V7 version.

> > +             return;
> > +
> > +     SDHCI_UHS2_DUMP("==================== UHS2 ==================\n");
> > +     SDHCI_UHS2_DUMP("Blk Size:  0x%08x | Blk Cnt:  0x%08x\n",
> > +                     sdhci_readw(host, SDHCI_UHS2_BLOCK_SIZE),
> > +                     sdhci_readl(host, SDHCI_UHS2_BLOCK_COUNT));
> > +     SDHCI_UHS2_DUMP("Cmd:       0x%08x | Trn mode: 0x%08x\n",
> > +                     sdhci_readw(host, SDHCI_UHS2_CMD),
> > +                     sdhci_readw(host, SDHCI_UHS2_TRANS_MODE));
> > +     SDHCI_UHS2_DUMP("Int Stat:  0x%08x | Dev Sel : 0x%08x\n",
> > +                     sdhci_readw(host, SDHCI_UHS2_DEV_INT_STATUS),
> > +                     sdhci_readb(host, SDHCI_UHS2_DEV_SELECT));
> > +     SDHCI_UHS2_DUMP("Dev Int Code:  0x%08x\n",
> > +                     sdhci_readb(host, SDHCI_UHS2_DEV_INT_CODE));
> > +     SDHCI_UHS2_DUMP("Reset:     0x%08x | Timer:    0x%08x\n",
> > +                     sdhci_readw(host, SDHCI_UHS2_SW_RESET),
> > +                     sdhci_readw(host, SDHCI_UHS2_TIMER_CTRL));
> > +     SDHCI_UHS2_DUMP("ErrInt:    0x%08x | ErrIntEn: 0x%08x\n",
> > +                     sdhci_readl(host, SDHCI_UHS2_INT_STATUS),
> > +                     sdhci_readl(host, SDHCI_UHS2_INT_STATUS_ENABLE));
> > +     SDHCI_UHS2_DUMP("ErrSigEn:  0x%08x\n",
> > +                     sdhci_readl(host, SDHCI_UHS2_INT_SIGNAL_ENABLE));
> > +}
> > +EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs);
> >
> >  /*****************************************************************************\
> >   *                                                                           *
> > diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
> > index 29cd91f12b9e..a1fcd7899829 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.h
> > +++ b/drivers/mmc/host/sdhci-uhs2.h
> > @@ -172,4 +172,8 @@
> >  #define SDHCI_UHS2_EMBED_CTRL_PTR 0xE6
> >  #define SDHCI_UHS2_VENDOR_PTR     0xE8
> >
> > +struct sdhci_host;
> > +
> > +void sdhci_uhs2_dump_regs(struct sdhci_host *host);
> > +
> >  #endif /* __SDHCI_UHS2_H */
> > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> > index f3af1bd0f7b9..9b66b9a32c72 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -110,6 +110,9 @@ void sdhci_dumpregs(struct sdhci_host *host)
> >               }
> >       }
> >
> > +     if (host->ops->dump_uhs2_regs)
> > +             host->ops->dump_uhs2_regs(host);
> > +
> >       if (host->ops->dump_vendor_regs)
> >               host->ops->dump_vendor_regs(host);
> >
> > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> > index 40125ecd4e3f..f41c19c76994 100644
> > --- a/drivers/mmc/host/sdhci.h
> > +++ b/drivers/mmc/host/sdhci.h
> > @@ -723,6 +723,7 @@ struct sdhci_ops {
> >       void    (*request_done)(struct sdhci_host *host,
> >                               struct mmc_request *mrq);
> >       void    (*dump_vendor_regs)(struct sdhci_host *host);
> > +     void    (*dump_uhs2_regs)(struct sdhci_host *host);
> >  };
> >
> >  #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
>

Thanks, Victor Shih