diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index c62e709..b88f5b3 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -24,275 +24,289 @@
 static int no_dma;
 module_param(no_dma, bool, 0644);
 
-#define TIFM_MS_TIMEOUT      0x00100
-#define TIFM_MS_BADCRC       0x00200
-#define TIFM_MS_EOTPC        0x01000
-#define TIFM_MS_INT          0x02000
+/*
+ * Some control bits of TIFM appear to conform to Sony's reference design,
+ * so I'm just assuming they all are.
+ */
 
-/* The meaning of the bit majority in this constant is unknown. */
-#define TIFM_MS_SERIAL       0x04010
+#define TIFM_MS_STAT_DRQ     0x04000
+#define TIFM_MS_STAT_MSINT   0x02000
+#define TIFM_MS_STAT_RDY     0x01000
+#define TIFM_MS_STAT_CRC     0x00200
+#define TIFM_MS_STAT_TOE     0x00100
+#define TIFM_MS_STAT_EMP     0x00020
+#define TIFM_MS_STAT_FUL     0x00010
+#define TIFM_MS_STAT_CED     0x00008
+#define TIFM_MS_STAT_ERR     0x00004
+#define TIFM_MS_STAT_BRQ     0x00002
+#define TIFM_MS_STAT_CNK     0x00001
 
-#define TIFM_MS_SYS_LATCH    0x00100
-#define TIFM_MS_SYS_NOT_RDY  0x00800
-#define TIFM_MS_SYS_DATA     0x10000
+#define TIFM_MS_SYS_DMA      0x10000
+#define TIFM_MS_SYS_RESET    0x08000
+#define TIFM_MS_SYS_SRAC     0x04000
+#define TIFM_MS_SYS_INTEN    0x02000
+#define TIFM_MS_SYS_NOCRC    0x01000
+#define TIFM_MS_SYS_INTCLR   0x00800
+#define TIFM_MS_SYS_MSIEN    0x00400
+#define TIFM_MS_SYS_FCLR     0x00200
+#define TIFM_MS_SYS_FDIR     0x00100
+#define TIFM_MS_SYS_DAM      0x00080
+#define TIFM_MS_SYS_DRM      0x00040
+#define TIFM_MS_SYS_DRQSL    0x00020
+#define TIFM_MS_SYS_REI      0x00010
+#define TIFM_MS_SYS_REO      0x00008
+#define TIFM_MS_SYS_BSY_MASK 0x00007
+
+#define TIFM_MS_SYS_FIFO     (TIFM_MS_SYS_INTEN | TIFM_MS_SYS_MSIEN \
+			      | TIFM_MS_SYS_FCLR | TIFM_MS_SYS_BSY_MASK)
 
 /* Hardware flags */
 enum {
-	CMD_READY  = 0x0001,
-	FIFO_READY = 0x0002,
-	CARD_READY = 0x0004,
-	DATA_CARRY = 0x0008
+	CMD_READY  = 0x01,
+	FIFO_READY = 0x02,
+	CARD_INT   = 0x04
 };
 
 struct tifm_ms {
 	struct tifm_dev         *dev;
-	unsigned short          eject:1,
-				no_dma:1;
-	unsigned short          cmd_flags;
+	struct timer_list       timer;
+	struct memstick_request *req;
 	unsigned int            mode_mask;
 	unsigned int            block_pos;
 	unsigned long           timeout_jiffies;
-
-	struct timer_list       timer;
-	struct memstick_request *req;
+	unsigned char           eject:1,
+				use_dma:1;
+	unsigned char           cmd_flags;
+	unsigned char           io_pos;
 	unsigned int            io_word;
 };
 
-static void tifm_ms_read_fifo(struct tifm_ms *host, unsigned int fifo_offset,
-			      struct page *pg, unsigned int page_off,
-			      unsigned int length)
+static unsigned int tifm_ms_read_data(struct tifm_ms *host,
+				      unsigned char *buf, unsigned int length)
 {
 	struct tifm_dev *sock = host->dev;
-	unsigned int cnt = 0, off = 0;
-	unsigned char *buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + page_off;
+	unsigned int off = 0;
 
-	if (host->cmd_flags & DATA_CARRY) {
-		while ((fifo_offset & 3) && length) {
+	while (host->io_pos && length) {
+		buf[off++] = host->io_word & 0xff;
+		host->io_word >>= 8;
+		length--;
+		host->io_pos--;
+	}
+
+	if (!length)
+		return off;
+
+	while (!(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
+		if (length < 4)
+			break;
+		*(unsigned int *)(buf + off) = __raw_readl(sock->addr
+							   + SOCK_MS_DATA);
+		length -= 4;
+		off += 4;
+	}
+
+	if (length
+	    && !(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
+		host->io_word = readl(sock->addr + SOCK_MS_DATA);
+		for (host->io_pos = 4; host->io_pos; --host->io_pos) {
 			buf[off++] = host->io_word & 0xff;
 			host->io_word >>= 8;
 			length--;
-			fifo_offset++;
+			if (!length)
+				break;
 		}
-		if (!(fifo_offset & 3))
-			host->cmd_flags &= ~DATA_CARRY;
-		if (!length)
-			return;
 	}
 
-	do {
-		host->io_word = readl(sock->addr + SOCK_FIFO_ACCESS
-				      + fifo_offset);
-		cnt = 4;
-		while (length && cnt) {
-			buf[off++] = (host->io_word >> 8) & 0xff;
-			cnt--;
-			length--;
-		}
-		fifo_offset += 4 - cnt;
-	} while (length);
-
-	if (cnt)
-		host->cmd_flags |= DATA_CARRY;
-
-	kunmap_atomic(buf - page_off, KM_BIO_DST_IRQ);
+	return off;
 }
 
-static void tifm_ms_write_fifo(struct tifm_ms *host, unsigned int fifo_offset,
-			       struct page *pg, unsigned int page_off,
-			       unsigned int length)
+static unsigned int tifm_ms_write_data(struct tifm_ms *host,
+				       unsigned char *buf, unsigned int length)
 {
 	struct tifm_dev *sock = host->dev;
-	unsigned int cnt = 0, off = 0;
-	unsigned char *buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + page_off;
+	unsigned int off = 0;
 
-	if (host->cmd_flags & DATA_CARRY) {
-		while (fifo_offset & 3) {
-			host->io_word |= buf[off++] << (8 * (fifo_offset & 3));
+	if (host->io_pos) {
+		while (host->io_pos < 4 && length) {
+			host->io_word |=  buf[off++] << (host->io_pos * 8);
+			host->io_pos++;
 			length--;
-			fifo_offset++;
 		}
-		if (!(fifo_offset & 3)) {
-			writel(host->io_word, sock->addr + SOCK_FIFO_ACCESS
-			       + fifo_offset - 4);
-
-			host->cmd_flags &= ~DATA_CARRY;
-		}
-		if (!length)
-			return;
 	}
 
-	do {
-		cnt = 4;
+	if (host->io_pos == 4
+	    && !(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
+		writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
+		       sock->addr + SOCK_MS_SYSTEM);
+		writel(host->io_word, sock->addr + SOCK_MS_DATA);
+		host->io_pos = 0;
 		host->io_word = 0;
-		while (length && cnt) {
-			host->io_word |= buf[off++] << (4 - cnt);
-			cnt--;
-			length--;
-		}
-		fifo_offset += 4 - cnt;
-		if (!cnt)
-			writel(host->io_word, sock->addr + SOCK_FIFO_ACCESS
-					      + fifo_offset - 4);
-
-	} while (length);
-
-	if (cnt)
-		host->cmd_flags |= DATA_CARRY;
-
-	kunmap_atomic(buf - page_off, KM_BIO_SRC_IRQ);
-}
-
-static void tifm_ms_move_block(struct tifm_ms *host, unsigned int length)
-{
-	unsigned int t_size;
-	unsigned int off = host->req->sg.offset + host->block_pos;
-	unsigned int p_off, p_cnt;
-	struct page *pg;
-	unsigned long flags;
-
-	dev_dbg(&host->dev->dev, "moving block\n");
-	local_irq_save(flags);
-	t_size = length;
-	while (t_size) {
-		pg = nth_page(sg_page(&host->req->sg), off >> PAGE_SHIFT);
-		p_off = offset_in_page(off);
-		p_cnt = PAGE_SIZE - p_off;
-		p_cnt = min(p_cnt, t_size);
-
-		if (host->req->data_dir == WRITE)
-			tifm_ms_write_fifo(host, length - t_size,
-					   pg, p_off, p_cnt);
-		else
-			tifm_ms_read_fifo(host, length - t_size,
-					  pg, p_off, p_cnt);
-
-		t_size -= p_cnt;
+	} else if (host->io_pos) {
+		return off;
 	}
-	local_irq_restore(flags);
-}
-
-static int tifm_ms_transfer_data(struct tifm_ms *host, int skip)
-{
-	struct tifm_dev *sock = host->dev;
-	unsigned int length = host->req->sg.length - host->block_pos;
 
 	if (!length)
-		return 1;
+		return off;
 
-	if (length > TIFM_FIFO_SIZE)
-		length = TIFM_FIFO_SIZE;
-
-	if (!skip) {
-		tifm_ms_move_block(host, length);
-		host->block_pos += length;
+	while (!(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
+		if (length < 4)
+			break;
+		writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
+		       sock->addr + SOCK_MS_SYSTEM);
+		__raw_writel(*(unsigned int *)(buf + off),
+			     sock->addr + SOCK_MS_DATA);
+		length -= 4;
+		off += 4;
 	}
 
-	if ((host->req->data_dir == READ)
-	    && (host->block_pos == host->req->sg.length))
-		return 1;
+	switch (length) {
+	case 3:
+		host->io_word |= buf[off + 2] << 16;
+		host->io_pos++;
+	case 2:
+		host->io_word |= buf[off + 1] << 8;
+		host->io_pos++;
+	case 1:
+		host->io_word |= buf[off];
+		host->io_pos++;
+	}
 
-	writel(ilog2(length) - 2, sock->addr + SOCK_FIFO_PAGE_SIZE);
-	if (host->req->data_dir == WRITE)
-		writel((1 << 8) | TIFM_DMA_TX, sock->addr + SOCK_DMA_CONTROL);
-	else
-		writel((1 << 8), sock->addr + SOCK_DMA_CONTROL);
+	off += host->io_pos;
 
-	return 0;
+	return off;
+}
+
+static unsigned int tifm_ms_transfer_data(struct tifm_ms *host)
+{
+	struct tifm_dev *sock = host->dev;
+	unsigned int length;
+	unsigned int off;
+	unsigned int t_size, p_off, p_cnt;
+	unsigned char *buf;
+	struct page *pg;
+	unsigned long flags = 0;
+
+	if (host->req->long_data) {
+		length = host->req->sg.length - host->block_pos;
+		off = host->req->sg.offset + host->block_pos;
+	} else {
+		length = host->req->data_len - host->block_pos;
+		off = 0;
+	}
+	dev_dbg(&sock->dev, "fifo data transfer, %d, %d\n", length,
+		host->block_pos);
+
+	while (length) {
+		if (host->req->long_data) {
+			pg = nth_page(sg_page(&host->req->sg),
+				      off >> PAGE_SHIFT);
+			p_off = offset_in_page(off);
+			p_cnt = PAGE_SIZE - p_off;
+			p_cnt = min(p_cnt, length);
+
+			local_irq_save(flags);
+			buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + p_off;
+		} else {
+			buf = host->req->data + host->block_pos;
+			p_cnt = host->req->data_len - host->block_pos;
+		}
+
+		t_size = host->req->data_dir == WRITE
+			 ? tifm_ms_write_data(host, buf, p_cnt)
+			 : tifm_ms_read_data(host, buf, p_cnt);
+
+		if (host->req->long_data) {
+			kunmap_atomic(buf - p_off, KM_BIO_SRC_IRQ);
+			local_irq_restore(flags);
+		}
+
+		if (!t_size)
+			break;
+		host->block_pos += t_size;
+		length -= t_size;
+		off += t_size;
+	}
+
+	dev_dbg(&sock->dev, "fifo data transfer, %d remaining\n", length);
+	if (!length && (host->req->data_dir == WRITE)) {
+		if (host->io_pos) {
+			writel(TIFM_MS_SYS_FDIR
+			       | readl(sock->addr + SOCK_MS_SYSTEM),
+			       sock->addr + SOCK_MS_SYSTEM);
+			writel(host->io_word, sock->addr + SOCK_MS_DATA);
+		}
+		writel(TIFM_MS_SYS_FDIR
+		       | readl(sock->addr + SOCK_MS_SYSTEM),
+		       sock->addr + SOCK_MS_SYSTEM);
+		writel(0, sock->addr + SOCK_MS_DATA);
+	} else {
+		readl(sock->addr + SOCK_MS_DATA);
+	}
+
+	return length;
 }
 
 static int tifm_ms_issue_cmd(struct tifm_ms *host)
 {
 	struct tifm_dev *sock = host->dev;
 	unsigned char *data;
-	unsigned int data_len = 0, cmd = 0, cmd_mask = 0, cnt, tval = 0;
+	unsigned int data_len, cmd, sys_param;
 
 	host->cmd_flags = 0;
+	host->block_pos = 0;
+	host->io_pos = 0;
+	host->io_word = 0;
+	host->cmd_flags = 0;
+
+	data = host->req->data;
+
+	host->use_dma = !no_dma;
 
 	if (host->req->long_data) {
-		if (!host->no_dma) {
-			if (1 != tifm_map_sg(sock, &host->req->sg, 1,
-					     host->req->data_dir == READ
-					     ? PCI_DMA_FROMDEVICE
-					     : PCI_DMA_TODEVICE)) {
-				host->req->error = -ENOMEM;
-				return host->req->error;
-			}
-			data_len = sg_dma_len(&host->req->sg);
-		} else
-			data_len = host->req->sg.length;
+		data_len = host->req->sg.length;
+		if (!is_power_of_2(data_len))
+			host->use_dma = 0;
+	} else {
+		data_len = host->req->data_len;
+		host->use_dma = 0;
+	}
 
-		writel(TIFM_FIFO_INT_SETALL,
-		       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
-		writel(TIFM_FIFO_ENABLE,
-		       sock->addr + SOCK_FIFO_CONTROL);
+	writel(TIFM_FIFO_INT_SETALL,
+	       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
+	writel(TIFM_FIFO_ENABLE,
+	       sock->addr + SOCK_FIFO_CONTROL);
+
+	if (host->use_dma) {
+		if (1 != tifm_map_sg(sock, &host->req->sg, 1,
+				     host->req->data_dir == READ
+				     ? PCI_DMA_FROMDEVICE
+				     : PCI_DMA_TODEVICE)) {
+			host->req->error = -ENOMEM;
+			return host->req->error;
+		}
+		data_len = sg_dma_len(&host->req->sg);
+
+		writel(ilog2(data_len) - 2,
+		       sock->addr + SOCK_FIFO_PAGE_SIZE);
+		writel(TIFM_FIFO_INTMASK,
+		       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
+		sys_param = TIFM_DMA_EN | (1 << 8);
+		if (host->req->data_dir == WRITE)
+			sys_param |= TIFM_DMA_TX;
+
 		writel(TIFM_FIFO_INTMASK,
 		       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
 
-		if (!host->no_dma) {
-			writel(ilog2(data_len) - 2,
-			       sock->addr + SOCK_FIFO_PAGE_SIZE);
-			writel(sg_dma_address(&host->req->sg),
-			       sock->addr + SOCK_DMA_ADDRESS);
-			if (host->req->data_dir == WRITE)
-				writel((1 << 8) | TIFM_DMA_TX | TIFM_DMA_EN,
-				       sock->addr + SOCK_DMA_CONTROL);
-			else
-				writel((1 << 8) | TIFM_DMA_EN,
-				       sock->addr + SOCK_DMA_CONTROL);
-		} else {
-			tifm_ms_transfer_data(host,
-					      host->req->data_dir == READ);
-		}
-
-		cmd_mask = readl(sock->addr + SOCK_MS_SYSTEM);
-		cmd_mask |= TIFM_MS_SYS_DATA | TIFM_MS_SYS_NOT_RDY;
-		writel(cmd_mask, sock->addr + SOCK_MS_SYSTEM);
+		writel(sg_dma_address(&host->req->sg),
+		       sock->addr + SOCK_DMA_ADDRESS);
+		writel(sys_param, sock->addr + SOCK_DMA_CONTROL);
 	} else {
-		data = host->req->data;
-		data_len = host->req->data_len;
+		writel(host->mode_mask | TIFM_MS_SYS_FIFO,
+		       sock->addr + SOCK_MS_SYSTEM);
 
-		cmd_mask = host->mode_mask | 0x2607; /* unknown constant */
-
-		if (host->req->data_dir == WRITE) {
-			cmd_mask |= TIFM_MS_SYS_LATCH;
-			writel(cmd_mask, sock->addr + SOCK_MS_SYSTEM);
-			for (cnt = 0; (data_len - cnt) >= 4; cnt += 4) {
-				writel(TIFM_MS_SYS_LATCH
-				       | readl(sock->addr + SOCK_MS_SYSTEM),
-				       sock->addr + SOCK_MS_SYSTEM);
-				__raw_writel(*(unsigned int *)(data + cnt),
-					     sock->addr + SOCK_MS_DATA);
-				dev_dbg(&sock->dev, "writing %x\n",
-					*(int *)(data + cnt));
-			}
-			switch (data_len - cnt) {
-			case 3:
-				tval |= data[cnt + 2] << 16;
-			case 2:
-				tval |= data[cnt + 1] << 8;
-			case 1:
-				tval |= data[cnt];
-				writel(TIFM_MS_SYS_LATCH
-				       | readl(sock->addr + SOCK_MS_SYSTEM),
-				       sock->addr + SOCK_MS_SYSTEM);
-				writel(tval, sock->addr + SOCK_MS_DATA);
-				dev_dbg(&sock->dev, "writing %x\n", tval);
-			}
-
-			writel(TIFM_MS_SYS_LATCH
-			       | readl(sock->addr + SOCK_MS_SYSTEM),
-			       sock->addr + SOCK_MS_SYSTEM);
-			writel(0, sock->addr + SOCK_MS_DATA);
-			dev_dbg(&sock->dev, "writing %x\n", 0);
-
-		} else
-			writel(cmd_mask, sock->addr + SOCK_MS_SYSTEM);
-
-		cmd_mask = readl(sock->addr + SOCK_MS_SYSTEM);
-		cmd_mask &= ~TIFM_MS_SYS_DATA;
-		cmd_mask |= TIFM_MS_SYS_NOT_RDY;
-		dev_dbg(&sock->dev, "mask %x\n", cmd_mask);
-		writel(cmd_mask, sock->addr + SOCK_MS_SYSTEM);
+		writel(TIFM_FIFO_MORE,
+		       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
 	}
 
 	mod_timer(&host->timer, jiffies + host->timeout_jiffies);
@@ -300,11 +314,21 @@
 	       sock->addr + SOCK_CONTROL);
 	host->req->error = 0;
 
+	sys_param = readl(sock->addr + SOCK_MS_SYSTEM);
+	sys_param |= TIFM_MS_SYS_INTCLR;
+
+	if (host->use_dma)
+		sys_param |= TIFM_MS_SYS_DMA;
+	else
+		sys_param &= ~TIFM_MS_SYS_DMA;
+
+	writel(sys_param, sock->addr + SOCK_MS_SYSTEM);
+
 	cmd = (host->req->tpc & 0xf) << 12;
 	cmd |= data_len;
 	writel(cmd, sock->addr + SOCK_MS_COMMAND);
 
-	dev_dbg(&sock->dev, "executing TPC %x, %x\n", cmd, cmd_mask);
+	dev_dbg(&sock->dev, "executing TPC %x, %x\n", cmd, sys_param);
 	return 0;
 }
 
@@ -312,47 +336,20 @@
 {
 	struct tifm_dev *sock = host->dev;
 	struct memstick_host *msh = tifm_get_drvdata(sock);
-	unsigned int tval = 0, data_len;
-	unsigned char *data;
 	int rc;
 
 	del_timer(&host->timer);
-	if (host->req->long_data) {
-		if (!host->no_dma)
-			tifm_unmap_sg(sock, &host->req->sg, 1,
-				      host->req->data_dir == READ
-				      ? PCI_DMA_FROMDEVICE
-				      : PCI_DMA_TODEVICE);
-	} else {
-		writel(~TIFM_MS_SYS_DATA & readl(sock->addr + SOCK_MS_SYSTEM),
-		       sock->addr + SOCK_MS_SYSTEM);
 
-		data = host->req->data;
-		data_len = host->req->data_len;
-
-		if (host->req->data_dir == READ) {
-			for (rc = 0; (data_len - rc) >= 4; rc += 4)
-				*(int *)(data + rc)
-					= __raw_readl(sock->addr
-						      + SOCK_MS_DATA);
-
-			if (data_len - rc)
-				tval = readl(sock->addr + SOCK_MS_DATA);
-			switch (data_len - rc) {
-			case 3:
-				data[rc + 2] = (tval >> 16) & 0xff;
-			case 2:
-				data[rc + 1] = (tval >> 8) & 0xff;
-			case 1:
-				data[rc] = tval & 0xff;
-			}
-			readl(sock->addr + SOCK_MS_DATA);
-		}
-	}
+	if (host->use_dma)
+		tifm_unmap_sg(sock, &host->req->sg, 1,
+			      host->req->data_dir == READ
+			      ? PCI_DMA_FROMDEVICE
+			      : PCI_DMA_TODEVICE);
 
 	writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
 	       sock->addr + SOCK_CONTROL);
 
+	dev_dbg(&sock->dev, "TPC complete\n");
 	do {
 		rc = memstick_next_req(msh, &host->req);
 	} while (!rc && tifm_ms_issue_cmd(host));
@@ -363,11 +360,10 @@
 	if (!host->req->error) {
 		if (!(host->cmd_flags & CMD_READY))
 			return 1;
-		if (host->req->long_data
-		    && !(host->cmd_flags & FIFO_READY))
+		if (!(host->cmd_flags & FIFO_READY))
 			return 1;
 		if (host->req->need_card_int
-		    && !(host->cmd_flags & CARD_READY))
+		    && !(host->cmd_flags & CARD_INT))
 			return 1;
 	}
 	return 0;
@@ -377,18 +373,24 @@
 static void tifm_ms_data_event(struct tifm_dev *sock)
 {
 	struct tifm_ms *host;
-	unsigned int fifo_status = 0;
+	unsigned int fifo_status = 0, host_status = 0;
 	int rc = 1;
 
 	spin_lock(&sock->lock);
 	host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
 	fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
-	dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n",
-		fifo_status, host->cmd_flags);
+	host_status = readl(sock->addr + SOCK_MS_STATUS);
+	dev_dbg(&sock->dev,
+		"data event: fifo_status %x, host_status %x, flags %x\n",
+		fifo_status, host_status, host->cmd_flags);
 
 	if (host->req) {
-		if (fifo_status & TIFM_FIFO_READY) {
-			if (!host->no_dma || tifm_ms_transfer_data(host, 0)) {
+		if (host->use_dma && (fifo_status & 1)) {
+			host->cmd_flags |= FIFO_READY;
+			rc = tifm_ms_check_status(host);
+		}
+		if (!host->use_dma && (fifo_status & TIFM_FIFO_MORE)) {
+			if (!tifm_ms_transfer_data(host)) {
 				host->cmd_flags |= FIFO_READY;
 				rc = tifm_ms_check_status(host);
 			}
@@ -417,9 +419,9 @@
 		host_status, host->cmd_flags);
 
 	if (host->req) {
-		if (host_status & TIFM_MS_TIMEOUT)
+		if (host_status & TIFM_MS_STAT_TOE)
 			host->req->error = -ETIME;
-		else if (host_status & TIFM_MS_BADCRC)
+		else if (host_status & TIFM_MS_STAT_CRC)
 			host->req->error = -EILSEQ;
 
 		if (host->req->error) {
@@ -428,18 +430,17 @@
 			writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
 		}
 
-		if (host_status & TIFM_MS_EOTPC)
+		if (host_status & TIFM_MS_STAT_RDY)
 			host->cmd_flags |= CMD_READY;
-		if (host_status & TIFM_MS_INT)
-			host->cmd_flags |= CARD_READY;
+
+		if (host_status & TIFM_MS_STAT_MSINT)
+			host->cmd_flags |= CARD_INT;
 
 		rc = tifm_ms_check_status(host);
 
 	}
 
-	writel(TIFM_MS_SYS_NOT_RDY | readl(sock->addr + SOCK_MS_SYSTEM),
-	       sock->addr + SOCK_MS_SYSTEM);
-	writel((~TIFM_MS_SYS_DATA) & readl(sock->addr + SOCK_MS_SYSTEM),
+	writel(TIFM_MS_SYS_INTCLR | readl(sock->addr + SOCK_MS_SYSTEM),
 	       sock->addr + SOCK_MS_SYSTEM);
 
 	if (!rc)
@@ -499,7 +500,7 @@
 		break;
 	case MEMSTICK_INTERFACE:
 		if (value == MEMSTICK_SERIAL) {
-			host->mode_mask = TIFM_MS_SERIAL;
+			host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
 			writel((~TIFM_CTRL_FAST_CLK)
 			       & readl(sock->addr + SOCK_CONTROL),
 			       sock->addr + SOCK_CONTROL);
@@ -535,9 +536,10 @@
 	struct tifm_dev *sock = host->dev;
 	struct memstick_host *msh = tifm_get_drvdata(sock);
 
-	host->mode_mask = TIFM_MS_SERIAL;
-	writel(0x8000, sock->addr + SOCK_MS_SYSTEM);
-	writel(0x0200 | TIFM_MS_SYS_NOT_RDY, sock->addr + SOCK_MS_SYSTEM);
+	host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
+	writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
+	writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
+	       sock->addr + SOCK_MS_SYSTEM);
 	writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
 	if (tifm_has_ms_pif(sock))
 		msh->caps |= MEMSTICK_CAP_PAR4;
@@ -566,7 +568,6 @@
 	tifm_set_drvdata(sock, msh);
 	host->dev = sock;
 	host->timeout_jiffies = msecs_to_jiffies(1000);
-	host->no_dma = no_dma;
 
 	setup_timer(&host->timer, tifm_ms_abort, (unsigned long)host);
 
@@ -599,7 +600,7 @@
 		writel(TIFM_FIFO_INT_SETALL,
 		       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
 		writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
-		if (host->req->long_data && !host->no_dma)
+		if (host->use_dma)
 			tifm_unmap_sg(sock, &host->req->sg, 1,
 				      host->req->data_dir == READ
 				      ? PCI_DMA_TODEVICE
@@ -616,7 +617,8 @@
 
 	memstick_remove_host(msh);
 
-	writel(0x0200 | TIFM_MS_SYS_NOT_RDY, sock->addr + SOCK_MS_SYSTEM);
+	writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
+	       sock->addr + SOCK_MS_SYSTEM);
 	writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
 
 	memstick_free_host(msh);
diff --git a/include/linux/tifm.h b/include/linux/tifm.h
index da76ed8..848c0f3 100644
--- a/include/linux/tifm.h
+++ b/include/linux/tifm.h
@@ -70,9 +70,9 @@
 
 #define TIFM_FIFO_ENABLE          0x00000001
 #define TIFM_FIFO_READY           0x00000001
+#define TIFM_FIFO_MORE            0x00000008
 #define TIFM_FIFO_INT_SETALL      0x0000ffff
 #define TIFM_FIFO_INTMASK         0x00000005
-#define TIFM_FIFO_SIZE            0x00000200
 
 #define TIFM_DMA_RESET            0x00000002
 #define TIFM_DMA_TX               0x00008000