static void
msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
	struct msmsdcc_host *host = mmc_priv(mmc);
	unsigned long		flags;

	WARN_ON(host->curr.mrq != NULL);

	WARN_ON(host->pwr == 0);

	spin_lock_irqsave(&host->lock, flags);

	host->stats.reqs++;

	if (host->eject) {
		if (mrq->data && !(mrq->data->flags & MMC_DATA_READ)) {
			mrq->cmd->error = 0;
			mrq->data->bytes_xfered = mrq->data->blksz *
			                          mrq->data->blocks;
		} else
			mrq->cmd->error = -ENOMEDIUM;

		spin_unlock_irqrestore(&host->lock, flags);
		mmc_request_done(mmc, mrq);
		return;
	}

	host->curr.mrq = mrq;

	if (mrq->data && mrq->data->flags & MMC_DATA_READ)
		msmsdcc_start_data(host, mrq->data);

	msmsdcc_start_command(host, mrq->cmd, 0);

	if (host->cmdpoll && !msmsdcc_spin_on_status(host,
	        MCI_CMDRESPEND|MCI_CMDCRCFAIL|MCI_CMDTIMEOUT,
	        CMD_SPINMAX)) {
		uint32_t status = readl(host->base + MMCISTATUS);
		msmsdcc_do_cmdirq(host, status);
		writel(MCI_CMDRESPEND | MCI_CMDCRCFAIL | MCI_CMDTIMEOUT,
		       host->base + MMCICLEAR);
		host->stats.cmdpoll_hits++;
	} else {
		host->stats.cmdpoll_misses++;
		mod_timer(&host->command_timer, jiffies + HZ);
	}
	spin_unlock_irqrestore(&host->lock, flags);
}
static irqreturn_t
msmsdcc_pio_irq(int irq, void *dev_id)
{
	struct msmsdcc_host	*host = dev_id;
	void __iomem		*base = host->base;
	uint32_t		status;

	status = readl(base + MMCISTATUS);
#if IRQ_DEBUG
	msmsdcc_print_status(host, "irq1-r", status);
#endif

	/* SEMC_BEGIN (Crash on irq when data already handled - DMS00718508) */
//	do {
	while (host->pio.sg) {
		/* SEMC_END (Crash on irq when data already handled - DMS00718508) */

		unsigned long flags;
		unsigned int remain, len;
		char *buffer;

		if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) {
			if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll)
				break;

			if (msmsdcc_spin_on_status(host,
			                           (MCI_TXFIFOHALFEMPTY |
			                            MCI_RXDATAAVLBL),
			                           PIO_SPINMAX)) {
				break;
			}
		}

		/* Map the current scatter buffer */
		local_irq_save(flags);
		buffer = kmap_atomic(sg_page(host->pio.sg),
		                     KM_BIO_SRC_IRQ) + host->pio.sg->offset;
		buffer += host->pio.sg_off;
		remain = host->pio.sg->length - host->pio.sg_off;
		len = 0;
		if (status & MCI_RXACTIVE)
			len = msmsdcc_pio_read(host, buffer, remain);
		if (status & MCI_TXACTIVE)
			len = msmsdcc_pio_write(host, buffer, remain, status);

		/* Unmap the buffer */
		kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
		local_irq_restore(flags);

		host->pio.sg_off += len;
		host->curr.xfer_remain -= len;
		host->curr.data_xfered += len;
		remain -= len;

		if (remain == 0) {
			/* This sg page is full - do some housekeeping */
			if (status & MCI_RXACTIVE && host->curr.user_pages)
				flush_dcache_page(sg_page(host->pio.sg));

			if (!--host->pio.sg_len) {
				memset(&host->pio, 0, sizeof(host->pio));
				break;
			}

			/* Advance to next sg */
			host->pio.sg++;
			host->pio.sg_off = 0;
		}

		status = readl(base + MMCISTATUS);
		/* SEMC_BEGIN (Crash on irq when data already handled - DMS00718508) */
//	} while (1);
	}
	/* SEMC_END (Crash on irq when data already handled - DMS00718508) */

	if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
		writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);

	if (!host->curr.xfer_remain)
		writel(0, base + MMCIMASK1);

	return IRQ_HANDLED;
}
Пример #3
0
static int
msmsdcc_pio_irq(int irq, void *dev_id)
{
	struct msmsdcc_host	*host = dev_id;
	void __iomem		*base = host->base;
	uint32_t		status;

	status = readl(base + MMCISTATUS);
#if IRQ_DEBUG
	msmsdcc_print_status(host, "irq1-r", status);
#endif

/* SEMC:LC: Update for DMS00768370 start */
	//do {  /*original*/
	while(host->pio.sg){
/* SEMC:LC: Update for DMS00768370 end */
		unsigned long flags;
		unsigned int remain, len;
		char *buffer;

		if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) {
			if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll)
				break;

			if (msmsdcc_spin_on_status(host,
						   (MCI_TXFIFOHALFEMPTY |
						   MCI_RXDATAAVLBL),
						   PIO_SPINMAX)) {
				break;
			}
		}

		/* Map the current scatter buffer */
		local_irq_save(flags);
		buffer = kmap_atomic(sg_page(host->pio.sg),
				     KM_BIO_SRC_IRQ) + host->pio.sg->offset;
		buffer += host->pio.sg_off;
		remain = host->pio.sg->length - host->pio.sg_off;
		len = 0;
		if (status & MCI_RXACTIVE)
			len = msmsdcc_pio_read(host, buffer, remain);
		if (status & MCI_TXACTIVE)
			len = msmsdcc_pio_write(host, buffer, remain, status);

		/* Unmap the buffer */
		kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
		local_irq_restore(flags);

		host->pio.sg_off += len;
		host->curr.xfer_remain -= len;
		host->curr.data_xfered += len;
		remain -= len;

		if (remain == 0) {
			/* This sg page is full - do some housekeeping */
		if (status & MCI_RXACTIVE && host->curr.user_pages)
			flush_dcache_page(sg_page(host->pio.sg));

		if (!--host->pio.sg_len) {
			memset(&host->pio, 0, sizeof(host->pio));
			break;
		}

		/* Advance to next sg */
		host->pio.sg++;
		host->pio.sg_off = 0;
		}

		status = readl(base + MMCISTATUS);
/* SEMC:LC: Update for DMS00768370 start */
	//} while (1);  /*original*/
	}
/* SEMC:LC: Update for DMS00768370 end */
	
	if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
		writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);

/* ATHENV */
#ifdef ATH_PATCH
	if (!host->curr.xfer_remain) {
		if (host->pdev_id == ATH_WLAN_SLOT) {
			if (readl(host->base + MMCIMASK0) &
				MCI_SDIOINTOPERMASK)
				writel(MCI_SDIOINTOPERMASK, base + MMCIMASK1);
			else
				writel(0, base + MMCIMASK1);
		} else {
			writel(0, base + MMCIMASK1);
		}
	}
#else
	if (!host->curr.xfer_remain)
		writel(0, base + MMCIMASK1);
#endif
/* ATHENV */

	return IRQ_HANDLED;
}