Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-mmc

* 'devel' of master.kernel.org:/home/rmk/linux-2.6-mmc:
  [MMC] Don't check READY_FOR_DATA when reading
  [MMC] MMC_CAP_BYTEBLOCK flag for non-log2 block sizes capable hosts
  [MMC] Add multi block-write capability
  [MMC] Remove data->blksz_bits member
  [MMC] Convert mmci to use data->blksz rather than data->blksz_bits

drivers/mmc/at91_mci.c

@@ -822,6 +822,7 @@ static int at91_mci_probe(struct platform_device *pdev)
 	mmc->f_min = 375000;
 	mmc->f_max = 25000000;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+	mmc->caps = MMC_CAP_BYTEBLOCK;
 
 	host = mmc_priv(mmc);
 	host->mmc = mmc;

drivers/mmc/imxmmc.c

@@ -956,7 +956,7 @@ static int imxmci_probe(struct platform_device *pdev)
 	mmc->f_min = 150000;
 	mmc->f_max = CLK_RATE/2;
 	mmc->ocr_avail = MMC_VDD_32_33;
-	mmc->caps |= MMC_CAP_4_BIT_DATA;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_BYTEBLOCK;
 
 	/* MMC core transfer sizes tunable parameters */
 	mmc->max_hw_segs = 64;

drivers/mmc/mmc.c

@@ -996,7 +996,6 @@ static void mmc_read_scrs(struct mmc_host *host)
 
 		mmc_set_data_timeout(&data, card, 0);
 
-		data.blksz_bits = 3;
 		data.blksz = 1 << 3;
 		data.blocks = 1;
 		data.flags = MMC_DATA_READ;

drivers/mmc/mmc_block.c

@@ -32,6 +32,7 @@
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/protocol.h>
+#include <linux/mmc/host.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -165,6 +166,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 	do {
 		struct mmc_blk_request brq;
 		struct mmc_command cmd;
+		u32 readcmd, writecmd;
 
 		memset(&brq, 0, sizeof(struct mmc_blk_request));
 		brq.mrq.cmd = &brq.cmd;
@@ -172,7 +174,6 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 
 		brq.cmd.arg = req->sector << 9;
 		brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
-		brq.data.blksz_bits = md->block_bits;
 		brq.data.blksz = 1 << md->block_bits;
 		brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
 		brq.stop.opcode = MMC_STOP_TRANSMISSION;
@@ -181,20 +182,31 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 
 		mmc_set_data_timeout(&brq.data, card, rq_data_dir(req) != READ);
 
-		if (rq_data_dir(req) == READ) {
-			brq.cmd.opcode = brq.data.blocks > 1 ? MMC_READ_MULTIPLE_BLOCK : MMC_READ_SINGLE_BLOCK;
-			brq.data.flags |= MMC_DATA_READ;
-		} else {
-			brq.cmd.opcode = MMC_WRITE_BLOCK;
-			brq.data.flags |= MMC_DATA_WRITE;
+		/*
+		 * If the host doesn't support multiple block writes, force
+		 * block writes to single block.
+		 */
+		if (rq_data_dir(req) != READ &&
+		    !(card->host->caps & MMC_CAP_MULTIWRITE))
 			brq.data.blocks = 1;
-		}
 
 		if (brq.data.blocks > 1) {
 			brq.data.flags |= MMC_DATA_MULTI;
 			brq.mrq.stop = &brq.stop;
+			readcmd = MMC_READ_MULTIPLE_BLOCK;
+			writecmd = MMC_WRITE_MULTIPLE_BLOCK;
 		} else {
 			brq.mrq.stop = NULL;
+			readcmd = MMC_READ_SINGLE_BLOCK;
+			writecmd = MMC_WRITE_BLOCK;
+		}
+
+		if (rq_data_dir(req) == READ) {
+			brq.cmd.opcode = readcmd;
+			brq.data.flags |= MMC_DATA_READ;
+		} else {
+			brq.cmd.opcode = writecmd;
+			brq.data.flags |= MMC_DATA_WRITE;
 		}
 
 		brq.data.sg = mq->sg;
@@ -219,27 +231,29 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 			goto cmd_err;
 		}
 
-		do {
-			int err;
-
-			cmd.opcode = MMC_SEND_STATUS;
-			cmd.arg = card->rca << 16;
-			cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-			err = mmc_wait_for_cmd(card->host, &cmd, 5);
-			if (err) {
-				printk(KERN_ERR "%s: error %d requesting status\n",
-				       req->rq_disk->disk_name, err);
-				goto cmd_err;
-			}
-		} while (!(cmd.resp[0] & R1_READY_FOR_DATA));
+		if (rq_data_dir(req) != READ) {
+			do {
+				int err;
+
+				cmd.opcode = MMC_SEND_STATUS;
+				cmd.arg = card->rca << 16;
+				cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+				err = mmc_wait_for_cmd(card->host, &cmd, 5);
+				if (err) {
+					printk(KERN_ERR "%s: error %d requesting status\n",
+					       req->rq_disk->disk_name, err);
+					goto cmd_err;
+				}
+			} while (!(cmd.resp[0] & R1_READY_FOR_DATA));
 
 #if 0
-		if (cmd.resp[0] & ~0x00000900)
-			printk(KERN_ERR "%s: status = %08x\n",
-			       req->rq_disk->disk_name, cmd.resp[0]);
-		if (mmc_decode_status(cmd.resp))
-			goto cmd_err;
+			if (cmd.resp[0] & ~0x00000900)
+				printk(KERN_ERR "%s: status = %08x\n",
+				       req->rq_disk->disk_name, cmd.resp[0]);
+			if (mmc_decode_status(cmd.resp))
+				goto cmd_err;
 #endif
+		}
 
 		/*
 		 * A block was successfully transferred.

drivers/mmc/mmci.c

@@ -69,12 +69,13 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
 	unsigned int datactrl, timeout, irqmask;
 	unsigned long long clks;
 	void __iomem *base;
+	int blksz_bits;
 
 	DBG(host, "blksz %04x blks %04x flags %08x\n",
-	    1 << data->blksz_bits, data->blocks, data->flags);
+	    data->blksz, data->blocks, data->flags);
 
 	host->data = data;
-	host->size = data->blocks << data->blksz_bits;
+	host->size = data->blksz;
 	host->data_xfered = 0;
 
 	mmci_init_sg(host, data);
@@ -88,7 +89,10 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
 	writel(timeout, base + MMCIDATATIMER);
 	writel(host->size, base + MMCIDATALENGTH);
 
-	datactrl = MCI_DPSM_ENABLE | data->blksz_bits << 4;
+	blksz_bits = ffs(data->blksz) - 1;
+	BUG_ON(1 << blksz_bits != data->blksz);
+
+	datactrl = MCI_DPSM_ENABLE | blksz_bits << 4;
 	if (data->flags & MMC_DATA_READ) {
 		datactrl |= MCI_DPSM_DIRECTION;
 		irqmask = MCI_RXFIFOHALFFULLMASK;
@@ -145,7 +149,7 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
 	      unsigned int status)
 {
 	if (status & MCI_DATABLOCKEND) {
-		host->data_xfered += 1 << data->blksz_bits;
+		host->data_xfered += data->blksz;
 	}
 	if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
 		if (status & MCI_DATACRCFAIL)
@@ -505,6 +509,7 @@ static int mmci_probe(struct amba_device *dev, void *id)
 	mmc->f_min = (host->mclk + 511) / 512;
 	mmc->f_max = min(host->mclk, fmax);
 	mmc->ocr_avail = plat->ocr_mask;
+	mmc->caps = MMC_CAP_MULTIWRITE;
 
 	/*
 	 * We can do SGIO

drivers/mmc/omap.c

@@ -1034,13 +1034,14 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 	host->irq = pdev->resource[1].start;
 	host->base = (void __iomem*)IO_ADDRESS(r->start);
 
-	if (minfo->wire4)
-		 mmc->caps |= MMC_CAP_4_BIT_DATA;
-
 	mmc->ops = &mmc_omap_ops;
 	mmc->f_min = 400000;
 	mmc->f_max = 24000000;
 	mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
+	mmc->caps = MMC_CAP_BYTEBLOCK;
+
+	if (minfo->wire4)
+		 mmc->caps |= MMC_CAP_4_BIT_DATA;
 
 	/* Use scatterlist DMA to reduce per-transfer costs.
 	 * NOTE max_seg_size assumption that small blocks aren't

drivers/mmc/sdhci.c

@@ -1262,7 +1262,7 @@ 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->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
 
 	mmc->ocr_avail = 0;
 	if (caps & SDHCI_CAN_VDD_330)

drivers/mmc/wbsd.c

@@ -1323,7 +1323,7 @@ static int __devinit wbsd_alloc_mmc(struct device *dev)
 	mmc->f_min = 375000;
 	mmc->f_max = 24000000;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-	mmc->caps = MMC_CAP_4_BIT_DATA;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
 
 	spin_lock_init(&host->lock);
 

include/linux/mmc/host.h

@@ -85,6 +85,8 @@ struct mmc_host {
 	unsigned long		caps;		/* Host capabilities */
 
 #define MMC_CAP_4_BIT_DATA	(1 << 0)	/* Can the host do 4 bit transfers */
+#define MMC_CAP_MULTIWRITE	(1 << 1)	/* Can accurately report bytes sent to card on error */
+#define MMC_CAP_BYTEBLOCK	(1 << 2)	/* Can do non-log2 block sizes */
 
 	/* host specific block data */
 	unsigned int		max_seg_size;	/* see blk_queue_max_segment_size */

include/linux/mmc/mmc.h

@@ -68,7 +68,6 @@ struct mmc_command {
 struct mmc_data {
 	unsigned int		timeout_ns;	/* data timeout (in ns, max 80ms) */
 	unsigned int		timeout_clks;	/* data timeout (in clocks) */
-	unsigned int		blksz_bits;	/* data block size */
 	unsigned int		blksz;		/* data block size */
 	unsigned int		blocks;		/* number of blocks */
 	unsigned int		error;		/* data error */