Hi Barry,
How are SDIO interrupts handled ?
Philip
On Apr 25, 2011, at 8:34 PM, Barry Song wrote:
> From: Bin Shi <bin.shi@xxxxxxx>
>
> some controllers share data bus or other pins between
> multi-controllers and need to switch the functions of shared pins
> runtime.
> this patch requested those shared pins before actual hardware access
> and release them after access
>
> Signed-off-by: Bin Shi <bin.shi@xxxxxxx>
> Cc: Binghua Duan <binghua.duan@xxxxxxx>
> Cc: Andrei Warkentin <andreiw@xxxxxxxxxxxx>
> Cc: Philip Rakity <prakity@xxxxxxxxxxx>
> Signed-off-by: Barry Song <21cnbao@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 13 +++++++++++++
> drivers/mmc/host/sdhci.h | 2 ++
> 2 files changed, 15 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index f70e21e..92ae9f7 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1143,6 +1143,13 @@ static void sdhci_request(struct mmc_host *mmc,
> struct mmc_request *mrq)
>
> host = mmc_priv(mmc);
>
> + /*
> + * some controllers share data bus or other pins between
> multi-controller
> + * and need to switch the function of pins runtime
> + */
> + if (host->ops->get_shared_pins)
> + host->ops->get_shared_pins(host);
> +
> spin_lock_irqsave(&host->lock, flags);
>
> WARN_ON(host->mrq != NULL);
> @@ -1417,6 +1424,12 @@ static void sdhci_tasklet_finish(unsigned long param)
> spin_unlock_irqrestore(&host->lock, flags);
>
> mmc_request_done(host->mmc, mrq);
> +
> + /*
> + * release shared pins so that other controllers can use them
> + */
> + if (host->ops->put_shared_pins)
> + host->ops->put_shared_pins(host);
> }
>
> static void sdhci_timeout_timer(unsigned long data)
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index c6e25a7..5a26cfe 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -231,6 +231,8 @@ struct sdhci_ops {
> unsigned int (*get_ro)(struct sdhci_host *host);
> void (*platform_reset_enter)(struct sdhci_host *host, u8 mask);
> void (*platform_reset_exit)(struct sdhci_host *host, u8 mask);
> + unsigned int (*get_shared_pins)(struct sdhci_host *host);
> + unsigned int (*put_shared_pins)(struct sdhci_host *host);
> };
>
> #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
> --
> 1.7.1
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