Commit 88ff82ed authored by Anders Grahn's avatar Anders Grahn Committed by Linus Torvalds
Browse files

mmc: atmel-mci: Add support for SDIO interrupts 



Atmel-mci support for SDIO interrupts.  This adds the enable_sdio_irq()
function and the configuration of sdio irq mask per slot.  With this irq
mask information, we keep the idea of multiple slot per sd/mmc host (not
only A and B).  MMC_CAP_SDIO_IRQ is added according to slot configuration.

A new little function is added to run mmc_signal_sdio_irq() during
interrupt handling routine.

Signed-off-by: default avatarAnders Grahn <anders.grahn@hd-wireless.se>
Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent fdc50a94

drivers/mmc/host/atmel-mci.c

+38 −4
Original line number Diff line number Diff line
@@ -173,6 +173,7 @@ struct atmel_mci { 
 * @mmc: The mmc_host representing this slot.

 * @host: The MMC controller this slot is using.

 * @sdc_reg: Value of SDCR to be written before using this slot.

 * @sdio_irq: SDIO irq mask for this slot.

 * @mrq: mmc_request currently being processed or waiting to be

 *	processed, or NULL when the slot is idle.

 * @queue_node: List node for placing this node in the @queue list of
@@ -191,6 +192,7 @@ struct atmel_mci_slot { 
	struct atmel_mci	*host;



	u32			sdc_reg;

	u32			sdio_irq;



	struct mmc_request	*mrq;

	struct list_head	queue_node;
@@ -792,7 +794,7 @@ static void atmci_start_request(struct atmel_mci *host, 
	mci_writel(host, SDCR, slot->sdc_reg);



	iflags = mci_readl(host, IMR);

	if (iflags)

	if (iflags & ~(MCI_SDIOIRQA | MCI_SDIOIRQB))

		dev_warn(&slot->mmc->class_dev, "WARNING: IMR=0x%08x\n",

				iflags);
@@ -1041,11 +1043,23 @@ static int atmci_get_cd(struct mmc_host *mmc) 
	return present;

}



static void atmci_enable_sdio_irq(struct mmc_host *mmc, int enable)

{

	struct atmel_mci_slot	*slot = mmc_priv(mmc);

	struct atmel_mci	*host = slot->host;



	if (enable)

		mci_writel(host, IER, slot->sdio_irq);

	else

		mci_writel(host, IDR, slot->sdio_irq);

}



static const struct mmc_host_ops atmci_ops = {

	.request	= atmci_request,

	.set_ios	= atmci_set_ios,

	.get_ro		= atmci_get_ro,

	.get_cd		= atmci_get_cd,

	.enable_sdio_irq = atmci_enable_sdio_irq,

};



/* Called with host->lock held */
@@ -1497,6 +1511,19 @@ static void atmci_cmd_interrupt(struct atmel_mci *host, u32 status) 
	tasklet_schedule(&host->tasklet);

}



static void atmci_sdio_interrupt(struct atmel_mci *host, u32 status)

{

	int	i;



	for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {

		struct atmel_mci_slot *slot = host->slot[i];

		if (slot && (status & slot->sdio_irq)) {

			mmc_signal_sdio_irq(slot->mmc);

		}

	}

}





static irqreturn_t atmci_interrupt(int irq, void *dev_id)

{

	struct atmel_mci	*host = dev_id;
@@ -1536,6 +1563,10 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) 


		if (pending & MCI_CMDRDY)

			atmci_cmd_interrupt(host, status);



		if (pending & (MCI_SDIOIRQA | MCI_SDIOIRQB))

			atmci_sdio_interrupt(host, status);



	} while (pass_count++ < 5);



	return pass_count ? IRQ_HANDLED : IRQ_NONE;
@@ -1558,7 +1589,7 @@ static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id) 


static int __init atmci_init_slot(struct atmel_mci *host,

		struct mci_slot_pdata *slot_data, unsigned int id,

		u32 sdc_reg)

		u32 sdc_reg, u32 sdio_irq)

{

	struct mmc_host			*mmc;

	struct atmel_mci_slot		*slot;
@@ -1574,11 +1605,14 @@ static int __init atmci_init_slot(struct atmel_mci *host, 
	slot->wp_pin = slot_data->wp_pin;

	slot->detect_is_active_high = slot_data->detect_is_active_high;

	slot->sdc_reg = sdc_reg;

	slot->sdio_irq = sdio_irq;



	mmc->ops = &atmci_ops;

	mmc->f_min = DIV_ROUND_UP(host->bus_hz, 512);

	mmc->f_max = host->bus_hz / 2;

	mmc->ocr_avail	= MMC_VDD_32_33 | MMC_VDD_33_34;

	if (sdio_irq)

		mmc->caps |= MMC_CAP_SDIO_IRQ;

	if (atmci_is_mci2())

		mmc->caps |= MMC_CAP_SD_HIGHSPEED;

	if (slot_data->bus_width >= 4)
@@ -1769,13 +1803,13 @@ static int __init atmci_probe(struct platform_device *pdev) 
	ret = -ENODEV;

	if (pdata->slot[0].bus_width) {

		ret = atmci_init_slot(host, &pdata->slot[0],

				0, MCI_SDCSEL_SLOT_A);

				0, MCI_SDCSEL_SLOT_A, MCI_SDIOIRQA);

		if (!ret)

			nr_slots++;

	}

	if (pdata->slot[1].bus_width) {

		ret = atmci_init_slot(host, &pdata->slot[1],

				1, MCI_SDCSEL_SLOT_B);

				1, MCI_SDCSEL_SLOT_B, MCI_SDIOIRQB);

		if (!ret)

			nr_slots++;

	}

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