Re: [Qemu-devel] [PATCH 2/2] sdhci: Implement DeviceClass reset

[Andrew Baumann <Andrew.Baumann@microsoft.com>]

> From: Peter Maydell [mailto:peter.maydell@linaro.org]
> Sent: Friday, 26 February 2016 5:24 AM
> 
> The sdhci device was missing a DeviceClass reset method;
> implement it. Poweron reset looks the same as reset commanded
> by the guest via the device registers, apart from modelling of
> the rpi 'pending insert interrupt on powerup' quirk.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>  hw/sd/sdhci.c | 21 +++++++++++++++++----
>  1 file changed, 17 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
> index e087c17..d28b587 100644
> --- a/hw/sd/sdhci.c
> +++ b/hw/sd/sdhci.c
> @@ -207,6 +207,21 @@ static void sdhci_reset(SDHCIState *s)
>      s->pending_insert_state = false;
>  }
> 
> +static void sdhci_poweron_reset(DeviceState *dev)
> +{
> +    /* QOM (ie power-on) reset. This is identical to reset
> +     * commanded via device register apart from handling of the
> +     * 'pending insert on powerup' quirk.
> +     */
> +    SDHCIState *s = (SDHCIState *)dev;
> +
> +    sdhci_reset(s);
> +
> +    if (s->pending_insert_quirk) {
> +        s->pending_insert_state = true;
> +    }
> +}
> +
>  static void sdhci_data_transfer(void *opaque);
> 
>  static void sdhci_send_command(SDHCIState *s)
> @@ -1290,6 +1305,7 @@ static void sdhci_pci_class_init(ObjectClass *klass,
> void *data)
>      set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
>      dc->vmsd = &sdhci_vmstate;
>      dc->props = sdhci_pci_properties;
> +    dc->reset = sdhci_poweron_reset;
>  }
> 
>  static const TypeInfo sdhci_pci_info = {
> @@ -1332,10 +1348,6 @@ static void sdhci_sysbus_realize(DeviceState *dev,
> Error ** errp)
>      memory_region_init_io(&s->iomem, OBJECT(s), &sdhci_mmio_ops, s,
> "sdhci",
>              SDHC_REGISTERS_MAP_SIZE);
>      sysbus_init_mmio(sbd, &s->iomem);
> -
> -    if (s->pending_insert_quirk) {
> -        s->pending_insert_state = true;
> -    }
>  }
> 
>  static void sdhci_sysbus_class_init(ObjectClass *klass, void *data)
> @@ -1345,6 +1357,7 @@ static void sdhci_sysbus_class_init(ObjectClass
> *klass, void *data)
>      dc->vmsd = &sdhci_vmstate;
>      dc->props = sdhci_sysbus_properties;
>      dc->realize = sdhci_sysbus_realize;
> +    dc->reset = sdhci_poweron_reset;
>  }
> 
>  static const TypeInfo sdhci_sysbus_info = {

Not tested, but the handling of the Pi quirk looks good to me, and it's trivial.

Reviewed-by: Andrew Baumann <Andrew.Baumann@microsoft.com>

BTW, now that you've done this, we could unify sdhci_pci_properties and sdhci_sysbus_properties. Let me know if you'd like a patch for that.

Cheers,
Andrew