memstick: initial commit for Sony MemoryStick support

Sony MemoryStick cards are used in many products manufactured by Sony.
They are available both as storage and as IO expansion cards.  Currently,
only MemoryStick Pro storage cards are supported via TI FlashMedia
MemoryStick interface.

[mboton@gmail.com: biuld fix]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Miguel Boton <mboton@gmail.co>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 717 insertions, 0 deletions

diff --git a/drivers/memstick/host/Kconfig b/drivers/memstick/host/Kconfig
new file mode 100644
index 00000000000..c002fcc3c87
--- /dev/null
+++ b/drivers/memstick/host/Kconfig
@@ -0,0 +1,22 @@
+#
+# MemoryStick host controller drivers
+#
+
+comment "MemoryStick Host Controller Drivers"
+
+config MEMSTICK_TIFM_MS
+	tristate "TI Flash Media MemoryStick Interface support  (EXPERIMENTAL)"
+	depends on EXPERIMENTAL && PCI
+	select TIFM_CORE
+	help
+	  Say Y here if you want to be able to access MemoryStick cards with
+	  the Texas Instruments(R) Flash Media card reader, found in many
+	  laptops.
+	  This option 'selects' (turns on, enables) 'TIFM_CORE', but you
+	  probably also need appropriate card reader host adapter, such as
+	  'Misc devices: TI Flash Media PCI74xx/PCI76xx host adapter support
+	  (TIFM_7XX1)'.
+
+          To compile this driver as a module, choose M here: the
+	  module will be called tifm_ms.
+
diff --git a/drivers/memstick/host/Makefile b/drivers/memstick/host/Makefile
new file mode 100644
index 00000000000..ee666380efa
--- /dev/null
+++ b/drivers/memstick/host/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for MemoryStick host controller drivers
+#
+
+ifeq ($(CONFIG_MEMSTICK_DEBUG),y)
+	EXTRA_CFLAGS		+= -DDEBUG
+endif
+
+obj-$(CONFIG_MEMSTICK_TIFM_MS)	+= tifm_ms.o
+
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
new file mode 100644
index 00000000000..f55b71a4337
--- /dev/null
+++ b/drivers/memstick/host/tifm_ms.c
@@ -0,0 +1,685 @@
+/*
+ *  TI FlashMedia driver
+ *
+ *  Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Special thanks to Carlos Corbacho for providing various MemoryStick cards
+ * that made this driver possible.
+ *
+ */
+
+#include <linux/tifm.h>
+#include <linux/memstick.h>
+#include <linux/highmem.h>
+#include <linux/scatterlist.h>
+#include <linux/log2.h>
+#include <asm/io.h>
+
+#define DRIVER_NAME "tifm_ms"
+#define DRIVER_VERSION "0.1"
+
+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
+
+/* The meaning of the bit majority in this constant is unknown. */
+#define TIFM_MS_SERIAL       0x04010
+
+#define TIFM_MS_SYS_LATCH    0x00100
+#define TIFM_MS_SYS_NOT_RDY  0x00800
+#define TIFM_MS_SYS_DATA     0x10000
+
+/* Hardware flags */
+enum {
+	CMD_READY  = 0x0001,
+	FIFO_READY = 0x0002,
+	CARD_READY = 0x0004,
+	DATA_CARRY = 0x0008
+};
+
+struct tifm_ms {
+	struct tifm_dev         *dev;
+	unsigned short          eject:1,
+				no_dma:1;
+	unsigned short          cmd_flags;
+	unsigned int            mode_mask;
+	unsigned int            block_pos;
+	unsigned long           timeout_jiffies;
+
+	struct timer_list       timer;
+	struct memstick_request *req;
+	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)
+{
+	struct tifm_dev *sock = host->dev;
+	unsigned int cnt = 0, off = 0;
+	unsigned char *buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + page_off;
+
+	if (host->cmd_flags & DATA_CARRY) {
+		while ((fifo_offset & 3) && length) {
+			buf[off++] = host->io_word & 0xff;
+			host->io_word >>= 8;
+			length--;
+			fifo_offset++;
+		}
+		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);
+}
+
+static void tifm_ms_write_fifo(struct tifm_ms *host, unsigned int fifo_offset,
+			       struct page *pg, unsigned int page_off,
+			       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;
+
+	if (host->cmd_flags & DATA_CARRY) {
+		while (fifo_offset & 3) {
+			host->io_word |= buf[off++] << (8 * (fifo_offset & 3));
+			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;
+		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;
+	}
+	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;
+
+	if (length > TIFM_FIFO_SIZE)
+		length = TIFM_FIFO_SIZE;
+
+	if (!skip) {
+		tifm_ms_move_block(host, length);
+		host->block_pos += length;
+	}
+
+	if ((host->req->data_dir == READ)
+	    && (host->block_pos == host->req->sg.length))
+		return 1;
+
+	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);
+
+	return 0;
+}
+
+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;
+
+	host->cmd_flags = 0;
+
+	if (host->req->io_type == MEMSTICK_IO_SG) {
+		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;
+
+		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_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);
+	} else if (host->req->io_type == MEMSTICK_IO_VAL) {
+		data = host->req->data;
+		data_len = host->req->data_len;
+
+		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 + 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);
+	} else
+		BUG();
+
+	mod_timer(&host->timer, jiffies + host->timeout_jiffies);
+	writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
+	       sock->addr + SOCK_CONTROL);
+	host->req->error = 0;
+
+	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);
+	return 0;
+}
+
+static void tifm_ms_complete_cmd(struct tifm_ms *host)
+{
+	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->io_type == MEMSTICK_IO_SG) {
+		if (!host->no_dma)
+			tifm_unmap_sg(sock, &host->req->sg, 1,
+				      host->req->data_dir == READ
+				      ? PCI_DMA_FROMDEVICE
+				      : PCI_DMA_TODEVICE);
+	} else if (host->req->io_type == MEMSTICK_IO_VAL) {
+		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);
+		}
+	}
+
+	writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
+	       sock->addr + SOCK_CONTROL);
+
+	do {
+		rc = memstick_next_req(msh, &host->req);
+	} while (!rc && tifm_ms_issue_cmd(host));
+}
+
+static int tifm_ms_check_status(struct tifm_ms *host)
+{
+	if (!host->req->error) {
+		if (!(host->cmd_flags & CMD_READY))
+			return 1;
+		if ((host->req->io_type == MEMSTICK_IO_SG)
+		    && !(host->cmd_flags & FIFO_READY))
+			return 1;
+		if (host->req->need_card_int
+		    && !(host->cmd_flags & CARD_READY))
+			return 1;
+	}
+	return 0;
+}
+
+/* Called from interrupt handler */
+static void tifm_ms_data_event(struct tifm_dev *sock)
+{
+	struct tifm_ms *host;
+	unsigned int fifo_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);
+
+	if (host->req) {
+		if (fifo_status & TIFM_FIFO_READY) {
+			if (!host->no_dma || tifm_ms_transfer_data(host, 0)) {
+				host->cmd_flags |= FIFO_READY;
+				rc = tifm_ms_check_status(host);
+			}
+		}
+	}
+
+	writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
+	if (!rc)
+		tifm_ms_complete_cmd(host);
+
+	spin_unlock(&sock->lock);
+}
+
+
+/* Called from interrupt handler */
+static void tifm_ms_card_event(struct tifm_dev *sock)
+{
+	struct tifm_ms *host;
+	unsigned int host_status = 0;
+	int rc = 1;
+
+	spin_lock(&sock->lock);
+	host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
+	host_status = readl(sock->addr + SOCK_MS_STATUS);
+	dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
+		host_status, host->cmd_flags);
+
+	if (host->req) {
+		if (host_status & TIFM_MS_TIMEOUT)
+			host->req->error = -ETIME;
+		else if (host_status & TIFM_MS_BADCRC)
+			host->req->error = -EILSEQ;
+
+		if (host->req->error) {
+			writel(TIFM_FIFO_INT_SETALL,
+			       sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
+			writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
+		}
+
+		if (host_status & TIFM_MS_EOTPC)
+			host->cmd_flags |= CMD_READY;
+		if (host_status & TIFM_MS_INT)
+			host->cmd_flags |= CARD_READY;
+
+		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),
+	       sock->addr + SOCK_MS_SYSTEM);
+
+	if (!rc)
+		tifm_ms_complete_cmd(host);
+
+	spin_unlock(&sock->lock);
+	return;
+}
+
+static void tifm_ms_request(struct memstick_host *msh)
+{
+	struct tifm_ms *host = memstick_priv(msh);
+	struct tifm_dev *sock = host->dev;
+	unsigned long flags;
+	int rc;
+
+	spin_lock_irqsave(&sock->lock, flags);
+	if (host->req) {
+		printk(KERN_ERR "%s : unfinished request detected\n",
+		       sock->dev.bus_id);
+		spin_unlock_irqrestore(&sock->lock, flags);
+		tifm_eject(host->dev);
+		return;
+	}
+
+	if (host->eject) {
+		do {
+			rc = memstick_next_req(msh, &host->req);
+			if (!rc)
+				host->req->error = -ETIME;
+		} while (!rc);
+		spin_unlock_irqrestore(&sock->lock, flags);
+		return;
+	}
+
+	do {
+		rc = memstick_next_req(msh, &host->req);
+	} while (!rc && tifm_ms_issue_cmd(host));
+
+	spin_unlock_irqrestore(&sock->lock, flags);
+	return;
+}
+
+static void tifm_ms_set_param(struct memstick_host *msh,
+			      enum memstick_param param,
+			      int value)
+{
+	struct tifm_ms *host = memstick_priv(msh);
+	struct tifm_dev *sock = host->dev;
+	unsigned long flags;
+
+	spin_lock_irqsave(&sock->lock, flags);
+
+	switch (param) {
+	case MEMSTICK_POWER:
+		/* this is set by card detection mechanism */
+		break;
+	case MEMSTICK_INTERFACE:
+		if (value == MEMSTICK_SERIAL) {
+			host->mode_mask = TIFM_MS_SERIAL;
+			writel((~TIFM_CTRL_FAST_CLK)
+			       & readl(sock->addr + SOCK_CONTROL),
+			       sock->addr + SOCK_CONTROL);
+		} else if (value == MEMSTICK_PARALLEL) {
+			host->mode_mask = 0;
+			writel(TIFM_CTRL_FAST_CLK
+			       | readl(sock->addr + SOCK_CONTROL),
+			       sock->addr + SOCK_CONTROL);
+		}
+		break;
+	};
+
+	spin_unlock_irqrestore(&sock->lock, flags);
+}
+
+static void tifm_ms_abort(unsigned long data)
+{
+	struct tifm_ms *host = (struct tifm_ms *)data;
+
+	dev_dbg(&host->dev->dev, "status %x\n",
+		readl(host->dev->addr + SOCK_MS_STATUS));
+	printk(KERN_ERR
+	       "%s : card failed to respond for a long period of time "
+	       "(%x, %x)\n",
+	       host->dev->dev.bus_id, host->req ? host->req->tpc : 0,
+	       host->cmd_flags);
+
+	tifm_eject(host->dev);
+}
+
+static int tifm_ms_initialize_host(struct tifm_ms *host)
+{
+	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);
+	writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
+	if (tifm_has_ms_pif(sock))
+		msh->caps |= MEMSTICK_CAP_PARALLEL;
+
+	return 0;
+}
+
+static int tifm_ms_probe(struct tifm_dev *sock)
+{
+	struct memstick_host *msh;
+	struct tifm_ms *host;
+	int rc = -EIO;
+
+	if (!(TIFM_SOCK_STATE_OCCUPIED
+	      & readl(sock->addr + SOCK_PRESENT_STATE))) {
+		printk(KERN_WARNING "%s : card gone, unexpectedly\n",
+		       sock->dev.bus_id);
+		return rc;
+	}
+
+	msh = memstick_alloc_host(sizeof(struct tifm_ms), &sock->dev);
+	if (!msh)
+		return -ENOMEM;
+
+	host = memstick_priv(msh);
+	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);
+
+	msh->request = tifm_ms_request;
+	msh->set_param = tifm_ms_set_param;
+	sock->card_event = tifm_ms_card_event;
+	sock->data_event = tifm_ms_data_event;
+	rc = tifm_ms_initialize_host(host);
+
+	if (!rc)
+		rc = memstick_add_host(msh);
+	if (!rc)
+		return 0;
+
+	memstick_free_host(msh);
+	return rc;
+}
+
+static void tifm_ms_remove(struct tifm_dev *sock)
+{
+	struct memstick_host *msh = tifm_get_drvdata(sock);
+	struct tifm_ms *host = memstick_priv(msh);
+	int rc = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&sock->lock, flags);
+	host->eject = 1;
+	if (host->req) {
+		del_timer(&host->timer);
+		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->io_type == MEMSTICK_IO_SG) && !host->no_dma)
+			tifm_unmap_sg(sock, &host->req->sg, 1,
+				      host->req->data_dir == READ
+				      ? PCI_DMA_TODEVICE
+				      : PCI_DMA_FROMDEVICE);
+		host->req->error = -ETIME;
+
+		do {
+			rc = memstick_next_req(msh, &host->req);
+			if (!rc)
+				host->req->error = -ETIME;
+		} while (!rc);
+	}
+	spin_unlock_irqrestore(&sock->lock, flags);
+
+	memstick_remove_host(msh);
+
+	writel(0x0200 | TIFM_MS_SYS_NOT_RDY, sock->addr + SOCK_MS_SYSTEM);
+	writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
+
+	memstick_free_host(msh);
+}
+
+#ifdef CONFIG_PM
+
+static int tifm_ms_suspend(struct tifm_dev *sock, pm_message_t state)
+{
+	return 0;
+}
+
+static int tifm_ms_resume(struct tifm_dev *sock)
+{
+	struct memstick_host *msh = tifm_get_drvdata(sock);
+	struct tifm_ms *host = memstick_priv(msh);
+
+	tifm_ms_initialize_host(host);
+	memstick_detect_change(msh);
+
+	return 0;
+}
+
+#else
+
+#define tifm_ms_suspend NULL
+#define tifm_ms_resume NULL
+
+#endif /* CONFIG_PM */
+
+static struct tifm_device_id tifm_ms_id_tbl[] = {
+	{ TIFM_TYPE_MS }, { 0 }
+};
+
+static struct tifm_driver tifm_ms_driver = {
+	.driver = {
+		.name  = DRIVER_NAME,
+		.owner = THIS_MODULE
+	},
+	.id_table = tifm_ms_id_tbl,
+	.probe    = tifm_ms_probe,
+	.remove   = tifm_ms_remove,
+	.suspend  = tifm_ms_suspend,
+	.resume   = tifm_ms_resume
+};
+
+static int __init tifm_ms_init(void)
+{
+	return tifm_register_driver(&tifm_ms_driver);
+}
+
+static void __exit tifm_ms_exit(void)
+{
+	tifm_unregister_driver(&tifm_ms_driver);
+}
+
+MODULE_AUTHOR("Alex Dubov");
+MODULE_DESCRIPTION("TI FlashMedia MemoryStick driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(tifm, tifm_ms_id_tbl);
+MODULE_VERSION(DRIVER_VERSION);
+
+module_init(tifm_ms_init);
+module_exit(tifm_ms_exit);