Re: [PATCH] OMAP35xx:SDIO IRQ Support for OMAP35xx

[Dirk Behme <dirk.behme@googlemail.com>]

On 21.12.2009 17:46, Mike Rapoport wrote:
> Hi,
>
> Phaneendra Kumar Alapati wrote:
>> This patch adds SDIO IRQ support for OMAP35xx. Tested on OMAP3530EVM
>> with Marvell 88W8686 card and below are the observed throughput results
>> (ttcp utility): 13Mbps (Downlink), 10.5 Mbps(Uplink)
>>
>> Signed-off-by: Phaneendra Kumar<phani@embwise.com>
>> ---
>>   drivers/mmc/host/omap_hsmmc.c |   55 ++++++++++++++++++++++++++++++++++++----
>>   1 files changed, 49 insertions(+), 6 deletions(-)
>
> I've tried the patch on CM-T35 that has Marvell 88W8686 on-board and
> surprisingly I get a lot of command timeouts from the libertas driver :(
> ---
> libertas: requeueing command 0x0006 due to timeout (#1)
> libertas: Received result 0 to command 6 after 1 retries
> libertas: command 0x0006 timed out
> ---
> I hope I'll find time to debug it in the next few days and provide more valuable
> information...

There is a test report from Overo air that there it doesn't work, too:

http://old.nabble.com/Re%3A-Overo-wifi-speed-and-WPA2-connection-issue-p27231874.html

Any news on this patch?

Best regards

Dirk

>> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
>> index 4b23225..fa94580 100644
>> --- a/drivers/mmc/host/omap_hsmmc.c
>> +++ b/drivers/mmc/host/omap_hsmmc.c
>> @@ -100,6 +100,10 @@
>>   #define SRD			(1<<  26)
>>   #define SOFTRESET		(1<<  1)
>>   #define RESETDONE		(1<<  0)
>> +#define CIRQ		(1<<  8)
>> +#define CIRQ_ENABLE	(1<<  8)
>> +#define CTPL		(1<<  11)
>> +#define CLKEXTFREE	(1<<  16)
>>
>>   /*
>>    * FIXME: Most likely all the data using these _DEVID defines should come
>> @@ -171,6 +175,7 @@ struct omap_hsmmc_host {
>>   	int			vdd;
>>   	int			protect_card;
>>   	int			reqs_blocked;
>> +	int			sdio_int;
>>
>>   	struct	omap_mmc_platform_data	*pdata;
>>   };
>> @@ -436,6 +441,13 @@ omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
>>   	else
>>   		OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);
>>
>> +	if (host->sdio_int) {
>> +		OMAP_HSMMC_WRITE(host->base, ISE,
>> +			(OMAP_HSMMC_READ(host->base, ISE) | CIRQ_ENABLE));
>> +		OMAP_HSMMC_WRITE(host->base, IE,
>> +			(OMAP_HSMMC_READ(host->base, IE) | CIRQ_ENABLE));
>> +	}
>> +
>>   	host->response_busy = 0;
>>   	if (cmd->flags&  MMC_RSP_PRESENT) {
>>   		if (cmd->flags&  MMC_RSP_136)
>> @@ -640,6 +652,17 @@ static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id)
>>
>>   	spin_lock(&host->irq_lock);
>>
>> +	data = host->data;
>> +	status = OMAP_HSMMC_READ(host->base, STAT);
>> +	dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
>> +
>> +	if (host->mmc->caps&  MMC_CAP_SDIO_IRQ) {
>> +		if (status&  CIRQ) {
>> +			dev_dbg(mmc_dev(host->mmc), "SDIO Card Interrupt\n");
>> +			mmc_signal_sdio_irq(host->mmc);
>> +		}
>> +	}
>> +
>>   	if (host->mrq == NULL) {
>>   		OMAP_HSMMC_WRITE(host->base, STAT,
>>   			OMAP_HSMMC_READ(host->base, STAT));
>> @@ -649,10 +672,6 @@ static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id)
>>   		return IRQ_HANDLED;
>>   	}
>>
>> -	data = host->data;
>> -	status = OMAP_HSMMC_READ(host->base, STAT);
>> -	dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
>> -
>>   	if (status&  ERR) {
>>   #ifdef CONFIG_MMC_DEBUG
>>   		omap_hsmmc_report_irq(host, status);
>> @@ -1254,6 +1273,25 @@ static int omap_hsmmc_get_ro(struct mmc_host *mmc)
>>   	return mmc_slot(host).get_ro(host->dev, 0);
>>   }
>>
>> +static void omap_hsmmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
>> +{
>> +	struct omap_hsmmc_host *host = mmc_priv(mmc);
>> +
>> +	host->sdio_int = enable;
>> +	if (enable) {
>> +		OMAP_HSMMC_WRITE(host->base, ISE,
>> +			(OMAP_HSMMC_READ(host->base, ISE) | CIRQ_ENABLE));
>> +		OMAP_HSMMC_WRITE(host->base, IE,
>> +			(OMAP_HSMMC_READ(host->base, IE) | CIRQ_ENABLE));
>> +	} else {
>> +		OMAP_HSMMC_WRITE(host->base, IE,
>> +			(OMAP_HSMMC_READ(host->base, IE)&  (~CIRQ_ENABLE)));
>> +		OMAP_HSMMC_WRITE(host->base, ISE,
>> +			(OMAP_HSMMC_READ(host->base, ISE)&  (~CIRQ_ENABLE)));
>> +	}
>> +
>> +}
>> +
>>   static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
>>   {
>>   	u32 hctl, capa, value;
>> @@ -1519,7 +1557,7 @@ static const struct mmc_host_ops omap_hsmmc_ops = {
>>   	.set_ios = omap_hsmmc_set_ios,
>>   	.get_cd = omap_hsmmc_get_cd,
>>   	.get_ro = omap_hsmmc_get_ro,
>> -	/* NYET -- enable_sdio_irq */
>> +	.enable_sdio_irq = omap_hsmmc_enable_sdio_irq,
>>   };
>>
>>   static const struct mmc_host_ops omap_hsmmc_ps_ops = {
>> @@ -1529,7 +1567,7 @@ static const struct mmc_host_ops omap_hsmmc_ps_ops = {
>>   	.set_ios = omap_hsmmc_set_ios,
>>   	.get_cd = omap_hsmmc_get_cd,
>>   	.get_ro = omap_hsmmc_get_ro,
>> -	/* NYET -- enable_sdio_irq */
>> +	.enable_sdio_irq = omap_hsmmc_enable_sdio_irq,
>>   };
>>
>>   #ifdef CONFIG_DEBUG_FS
>> @@ -1657,6 +1695,7 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
>>   	host->mapbase	= res->start;
>>   	host->base	= ioremap(host->mapbase, SZ_4K);
>>   	host->power_mode = -1;
>> +	host->sdio_int = 0;
>>
>>   	platform_set_drvdata(pdev, host);
>>   	INIT_WORK(&host->mmc_carddetect_work, omap_hsmmc_detect);
>> @@ -1744,6 +1783,10 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
>>   	if (mmc_slot(host).nonremovable)
>>   		mmc->caps |= MMC_CAP_NONREMOVABLE;
>>
>> +	mmc->caps |= MMC_CAP_SDIO_IRQ;
>> +	OMAP_HSMMC_WRITE(host->base, CON,
>> +			OMAP_HSMMC_READ(host->base, CON) | (CTPL | CLKEXTFREE));
>> +
>>   	omap_hsmmc_conf_bus_power(host);
>>
>>   	/* Select DMA lines */
>