Community MMC/SD/SDIO support from Pierre Ossman's tree

Patch to add Community MMC/SD/SDIO support from Pierre Ossman's tree
git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc.git
Author: Pierre Ossman
Snapshot taken 20070910, and applied to linux 2.6.22.6 by Quinn Jensen.
Portions Copyright Pierre Ossman and Monta Vista.

http://www.bitshrine.org/gpp/linux-2.6.22-mx-Community-MMC-SD-SDIO-support-from-Pierre-.patch

1 files changed, 63 insertions, 28 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f2bc87ac24f7..3ff33ddfebbb 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -477,17 +477,17 @@ static void sdhci_finish_data(struct sdhci_host *host)
 	/*
 	 * Controller doesn't count down when in single block mode.
 	 */
-	if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
+	if ((data->blocks == 1) && !data->error)
 		blocks = 0;
 	else
 		blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 	data->bytes_xfered = data->blksz * (data->blocks - blocks);
 
-	if ((data->error == MMC_ERR_NONE) && blocks) {
+	if (!data->error && blocks) {
 		printk(KERN_ERR "%s: Controller signalled completion even "
 			"though there were blocks left.\n",
 			mmc_hostname(host->mmc));
-		data->error = MMC_ERR_FAILED;
+		data->error = -EIO;
 	}
 
 	if (data->stop) {
@@ -495,7 +495,7 @@ static void sdhci_finish_data(struct sdhci_host *host)
 		 * The controller needs a reset of internal state machines
 		 * upon error conditions.
 		 */
-		if (data->error != MMC_ERR_NONE) {
+		if (data->error) {
 			sdhci_reset(host, SDHCI_RESET_CMD);
 			sdhci_reset(host, SDHCI_RESET_DATA);
 		}
@@ -530,7 +530,7 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 			printk(KERN_ERR "%s: Controller never released "
 				"inhibit bit(s).\n", mmc_hostname(host->mmc));
 			sdhci_dumpregs(host);
-			cmd->error = MMC_ERR_FAILED;
+			cmd->error = -EIO;
 			tasklet_schedule(&host->finish_tasklet);
 			return;
 		}
@@ -551,7 +551,7 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 	if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 		printk(KERN_ERR "%s: Unsupported response type!\n",
 			mmc_hostname(host->mmc));
-		cmd->error = MMC_ERR_INVALID;
+		cmd->error = -EINVAL;
 		tasklet_schedule(&host->finish_tasklet);
 		return;
 	}
@@ -598,7 +598,7 @@ static void sdhci_finish_command(struct sdhci_host *host)
 		}
 	}
 
-	host->cmd->error = MMC_ERR_NONE;
+	host->cmd->error = 0;
 
 	if (host->cmd->data)
 		host->data = host->cmd->data;
@@ -718,7 +718,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	host->mrq = mrq;
 
 	if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
-		host->mrq->cmd->error = MMC_ERR_TIMEOUT;
+		host->mrq->cmd->error = -ENOMEDIUM;
 		tasklet_schedule(&host->finish_tasklet);
 	} else
 		sdhci_send_command(host, mrq->cmd);
@@ -796,10 +796,35 @@ static int sdhci_get_ro(struct mmc_host *mmc)
 	return !(present & SDHCI_WRITE_PROTECT);
 }
 
+static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+	struct sdhci_host *host;
+	unsigned long flags;
+	u32 ier;
+
+	host = mmc_priv(mmc);
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	ier = readl(host->ioaddr + SDHCI_INT_ENABLE);
+
+	ier &= ~SDHCI_INT_CARD_INT;
+	if (enable)
+		ier |= SDHCI_INT_CARD_INT;
+
+	writel(ier, host->ioaddr + SDHCI_INT_ENABLE);
+	writel(ier, host->ioaddr + SDHCI_SIGNAL_ENABLE);
+
+	mmiowb();
+
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
 static const struct mmc_host_ops sdhci_ops = {
 	.request	= sdhci_request,
 	.set_ios	= sdhci_set_ios,
 	.get_ro		= sdhci_get_ro,
+	.enable_sdio_irq = sdhci_enable_sdio_irq,
 };
 
 /*****************************************************************************\
@@ -827,7 +852,7 @@ static void sdhci_tasklet_card(unsigned long param)
 			sdhci_reset(host, SDHCI_RESET_CMD);
 			sdhci_reset(host, SDHCI_RESET_DATA);
 
-			host->mrq->cmd->error = MMC_ERR_FAILED;
+			host->mrq->cmd->error = -ENOMEDIUM;
 			tasklet_schedule(&host->finish_tasklet);
 		}
 	}
@@ -855,9 +880,9 @@ static void sdhci_tasklet_finish(unsigned long param)
 	 * The controller needs a reset of internal state machines
 	 * upon error conditions.
 	 */
-	if ((mrq->cmd->error != MMC_ERR_NONE) ||
-		(mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
-		(mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
+	if (mrq->cmd->error ||
+		(mrq->data && (mrq->data->error ||
+		(mrq->data->stop && mrq->data->stop->error)))) {
 
 		/* Some controllers need this kick or reset won't work here */
 		if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
@@ -902,13 +927,13 @@ static void sdhci_timeout_timer(unsigned long data)
 		sdhci_dumpregs(host);
 
 		if (host->data) {
-			host->data->error = MMC_ERR_TIMEOUT;
+			host->data->error = -ETIMEDOUT;
 			sdhci_finish_data(host);
 		} else {
 			if (host->cmd)
-				host->cmd->error = MMC_ERR_TIMEOUT;
+				host->cmd->error = -ETIMEDOUT;
 			else
-				host->mrq->cmd->error = MMC_ERR_TIMEOUT;
+				host->mrq->cmd->error = -ETIMEDOUT;
 
 			tasklet_schedule(&host->finish_tasklet);
 		}
@@ -937,13 +962,12 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 	}
 
 	if (intmask & SDHCI_INT_TIMEOUT)
-		host->cmd->error = MMC_ERR_TIMEOUT;
-	else if (intmask & SDHCI_INT_CRC)
-		host->cmd->error = MMC_ERR_BADCRC;
-	else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
-		host->cmd->error = MMC_ERR_FAILED;
+		host->cmd->error = -ETIMEDOUT;
+	else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT |
+			SDHCI_INT_INDEX))
+		host->cmd->error = -EILSEQ;
 
-	if (host->cmd->error != MMC_ERR_NONE)
+	if (host->cmd->error)
 		tasklet_schedule(&host->finish_tasklet);
 	else if (intmask & SDHCI_INT_RESPONSE)
 		sdhci_finish_command(host);
@@ -970,13 +994,11 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 	}
 
 	if (intmask & SDHCI_INT_DATA_TIMEOUT)
-		host->data->error = MMC_ERR_TIMEOUT;
-	else if (intmask & SDHCI_INT_DATA_CRC)
-		host->data->error = MMC_ERR_BADCRC;
-	else if (intmask & SDHCI_INT_DATA_END_BIT)
-		host->data->error = MMC_ERR_FAILED;
+		host->data->error = -ETIMEDOUT;
+	else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
+		host->data->error = -EILSEQ;
 
-	if (host->data->error != MMC_ERR_NONE)
+	if (host->data->error)
 		sdhci_finish_data(host);
 	else {
 		if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
@@ -1001,6 +1023,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 	irqreturn_t result;
 	struct sdhci_host* host = dev_id;
 	u32 intmask;
+	int cardint = 0;
 
 	spin_lock(&host->lock);
 
@@ -1045,6 +1068,11 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 
 	intmask &= ~SDHCI_INT_BUS_POWER;
 
+	if (intmask & SDHCI_INT_CARD_INT)
+		cardint = 1;
+
+	intmask &= ~SDHCI_INT_CARD_INT;
+
 	if (intmask) {
 		printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
 			mmc_hostname(host->mmc), intmask);
@@ -1059,6 +1087,12 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 out:
 	spin_unlock(&host->lock);
 
+	/*
+	 * We have to delay this as it calls back into the driver.
+	 */
+	if (cardint)
+		mmc_signal_sdio_irq(host->mmc);
+
 	return result;
 }
 
@@ -1298,7 +1332,8 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	mmc->ops = &sdhci_ops;
 	mmc->f_min = host->max_clk / 256;
 	mmc->f_max = host->max_clk;
-	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE |
+		MMC_CAP_BYTEBLOCK | MMC_CAP_SDIO_IRQ;
 
 	if (caps & SDHCI_CAN_DO_HISPD)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED;