Merge branch 'linus' into core/iommu

Conflicts:
	arch/x86/Kconfig

12 files changed, 896 insertions, 824 deletions

diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index bc33200535f..6fde0a2e356 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -120,13 +120,6 @@ config MTD_PHRAM
 	  doesn't have access to, memory beyond the mem=xxx limit, nvram,
 	  memory on the video card, etc...
 
-config MTD_PS3VRAM
-	tristate "PS3 video RAM"
-	depends on FB_PS3
-	help
-	  This driver allows you to use excess PS3 video RAM as volatile
-	  storage or system swap.
-
 config MTD_LART
 	tristate "28F160xx flash driver for LART"
 	depends on SA1100_LART
diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile
index e51521df4e4..0993d5cf392 100644
--- a/drivers/mtd/devices/Makefile
+++ b/drivers/mtd/devices/Makefile
@@ -16,4 +16,3 @@ obj-$(CONFIG_MTD_LART)		+= lart.o
 obj-$(CONFIG_MTD_BLOCK2MTD)	+= block2mtd.o
 obj-$(CONFIG_MTD_DATAFLASH)	+= mtd_dataflash.o
 obj-$(CONFIG_MTD_M25P80)	+= m25p80.o
-obj-$(CONFIG_MTD_PS3VRAM)	+= ps3vram.o
diff --git a/drivers/mtd/devices/ps3vram.c b/drivers/mtd/devices/ps3vram.c
deleted file mode 100644
index d21e9beb7ed..00000000000
--- a/drivers/mtd/devices/ps3vram.c
+++ /dev/null
@@ -1,768 +0,0 @@
-/**
- * ps3vram - Use extra PS3 video ram as MTD block device.
- *
- * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
- * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
- */
-
-#include <linux/io.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/slab.h>
-#include <linux/version.h>
-#include <linux/gfp.h>
-#include <linux/delay.h>
-#include <linux/mtd/mtd.h>
-
-#include <asm/lv1call.h>
-#include <asm/ps3.h>
-
-#define DEVICE_NAME		"ps3vram"
-
-#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
-#define XDR_IOIF 0x0c000000
-
-#define FIFO_BASE XDR_IOIF
-#define FIFO_SIZE (64 * 1024)
-
-#define DMA_PAGE_SIZE (4 * 1024)
-
-#define CACHE_PAGE_SIZE (256 * 1024)
-#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
-
-#define CACHE_OFFSET CACHE_PAGE_SIZE
-#define FIFO_OFFSET 0
-
-#define CTRL_PUT 0x10
-#define CTRL_GET 0x11
-#define CTRL_TOP 0x15
-
-#define UPLOAD_SUBCH	1
-#define DOWNLOAD_SUBCH	2
-
-#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN	0x0000030c
-#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY	0x00000104
-
-#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601
-
-struct mtd_info ps3vram_mtd;
-
-#define CACHE_PAGE_PRESENT 1
-#define CACHE_PAGE_DIRTY   2
-
-struct ps3vram_tag {
-	unsigned int address;
-	unsigned int flags;
-};
-
-struct ps3vram_cache {
-	unsigned int page_count;
-	unsigned int page_size;
-	struct ps3vram_tag *tags;
-};
-
-struct ps3vram_priv {
-	u64 memory_handle;
-	u64 context_handle;
-	u32 *ctrl;
-	u32 *reports;
-	u8 __iomem *ddr_base;
-	u8 *xdr_buf;
-
-	u32 *fifo_base;
-	u32 *fifo_ptr;
-
-	struct device *dev;
-	struct ps3vram_cache cache;
-
-	/* Used to serialize cache/DMA operations */
-	struct mutex lock;
-};
-
-#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
-#define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
-#define DMA_NOTIFIER_SIZE        0x40
-#define NOTIFIER 7	/* notifier used for completion report */
-
-/* A trailing '-' means to subtract off ps3fb_videomemory.size */
-char *size = "256M-";
-module_param(size, charp, 0);
-MODULE_PARM_DESC(size, "memory size");
-
-static u32 *ps3vram_get_notifier(u32 *reports, int notifier)
-{
-	return (void *) reports +
-		DMA_NOTIFIER_OFFSET_BASE +
-		DMA_NOTIFIER_SIZE * notifier;
-}
-
-static void ps3vram_notifier_reset(struct mtd_info *mtd)
-{
-	int i;
-
-	struct ps3vram_priv *priv = mtd->priv;
-	u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
-	for (i = 0; i < 4; i++)
-		notify[i] = 0xffffffff;
-}
-
-static int ps3vram_notifier_wait(struct mtd_info *mtd, unsigned int timeout_ms)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
-	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
-
-	do {
-		if (!notify[3])
-			return 0;
-		msleep(1);
-	} while (time_before(jiffies, timeout));
-
-	return -ETIMEDOUT;
-}
-
-static void ps3vram_init_ring(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
-	priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
-}
-
-static int ps3vram_wait_ring(struct mtd_info *mtd, unsigned int timeout_ms)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
-
-	do {
-		if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
-			return 0;
-		msleep(1);
-	} while (time_before(jiffies, timeout));
-
-	dev_dbg(priv->dev, "%s:%d: FIFO timeout (%08x/%08x/%08x)\n", __func__,
-		__LINE__, priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
-		priv->ctrl[CTRL_TOP]);
-
-	return -ETIMEDOUT;
-}
-
-static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
-{
-	*(priv->fifo_ptr)++ = data;
-}
-
-static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan,
-				      u32 tag, u32 size)
-{
-	ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
-}
-
-static void ps3vram_rewind_ring(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	u64 status;
-
-	ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
-
-	priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
-
-	/* asking the HV for a blit will kick the fifo */
-	status = lv1_gpu_context_attribute(priv->context_handle,
-					   L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
-					   0, 0, 0, 0);
-	if (status)
-		dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n",
-			__func__, __LINE__);
-
-	priv->fifo_ptr = priv->fifo_base;
-}
-
-static void ps3vram_fire_ring(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	u64 status;
-
-	mutex_lock(&ps3_gpu_mutex);
-
-	priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
-		(priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
-
-	/* asking the HV for a blit will kick the fifo */
-	status = lv1_gpu_context_attribute(priv->context_handle,
-					   L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
-					   0, 0, 0, 0);
-	if (status)
-		dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n",
-			__func__, __LINE__);
-
-	if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
-		FIFO_SIZE - 1024) {
-		dev_dbg(priv->dev, "%s:%d: fifo full, rewinding\n", __func__,
-			__LINE__);
-		ps3vram_wait_ring(mtd, 200);
-		ps3vram_rewind_ring(mtd);
-	}
-
-	mutex_unlock(&ps3_gpu_mutex);
-}
-
-static void ps3vram_bind(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
-	ps3vram_out_ring(priv, 0x31337303);
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
-	ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
-	ps3vram_out_ring(priv, 0xfeed0001);	/* DMA system RAM instance */
-	ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
-
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
-	ps3vram_out_ring(priv, 0x3137c0de);
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
-	ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
-	ps3vram_out_ring(priv, 0xfeed0000);	/* DMA video RAM instance */
-	ps3vram_out_ring(priv, 0xfeed0001);	/* DMA system RAM instance */
-
-	ps3vram_fire_ring(mtd);
-}
-
-static int ps3vram_upload(struct mtd_info *mtd, unsigned int src_offset,
-			  unsigned int dst_offset, int len, int count)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
-	ps3vram_out_ring(priv, XDR_IOIF + src_offset);
-	ps3vram_out_ring(priv, dst_offset);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, count);
-	ps3vram_out_ring(priv, (1 << 8) | 1);
-	ps3vram_out_ring(priv, 0);
-
-	ps3vram_notifier_reset(mtd);
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_fire_ring(mtd);
-	if (ps3vram_notifier_wait(mtd, 200) < 0) {
-		dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__,
-			__LINE__);
-		return -1;
-	}
-
-	return 0;
-}
-
-static int ps3vram_download(struct mtd_info *mtd, unsigned int src_offset,
-			    unsigned int dst_offset, int len, int count)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
-	ps3vram_out_ring(priv, src_offset);
-	ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, len);
-	ps3vram_out_ring(priv, count);
-	ps3vram_out_ring(priv, (1 << 8) | 1);
-	ps3vram_out_ring(priv, 0);
-
-	ps3vram_notifier_reset(mtd);
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
-			   NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
-	ps3vram_out_ring(priv, 0);
-	ps3vram_fire_ring(mtd);
-	if (ps3vram_notifier_wait(mtd, 200) < 0) {
-		dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__,
-			__LINE__);
-		return -1;
-	}
-
-	return 0;
-}
-
-static void ps3vram_cache_evict(struct mtd_info *mtd, int entry)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-
-	if (cache->tags[entry].flags & CACHE_PAGE_DIRTY) {
-		dev_dbg(priv->dev, "%s:%d: flushing %d : 0x%08x\n", __func__,
-			__LINE__, entry, cache->tags[entry].address);
-		if (ps3vram_upload(mtd,
-				   CACHE_OFFSET + entry * cache->page_size,
-				   cache->tags[entry].address,
-				   DMA_PAGE_SIZE,
-				   cache->page_size / DMA_PAGE_SIZE) < 0) {
-			dev_dbg(priv->dev, "%s:%d: failed to upload from "
-				"0x%x to 0x%x size 0x%x\n", __func__, __LINE__,
-				entry * cache->page_size,
-				cache->tags[entry].address, cache->page_size);
-		}
-		cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
-	}
-}
-
-static void ps3vram_cache_load(struct mtd_info *mtd, int entry,
-			       unsigned int address)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-
-	dev_dbg(priv->dev, "%s:%d: fetching %d : 0x%08x\n", __func__, __LINE__,
-		entry, address);
-	if (ps3vram_download(mtd,
-			     address,
-			     CACHE_OFFSET + entry * cache->page_size,
-			     DMA_PAGE_SIZE,
-			     cache->page_size / DMA_PAGE_SIZE) < 0) {
-		dev_err(priv->dev, "%s:%d: failed to download from "
-			"0x%x to 0x%x size 0x%x\n", __func__, __LINE__, address,
-			entry * cache->page_size, cache->page_size);
-	}
-
-	cache->tags[entry].address = address;
-	cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
-}
-
-
-static void ps3vram_cache_flush(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-	int i;
-
-	dev_dbg(priv->dev, "%s:%d: FLUSH\n", __func__, __LINE__);
-	for (i = 0; i < cache->page_count; i++) {
-		ps3vram_cache_evict(mtd, i);
-		cache->tags[i].flags = 0;
-	}
-}
-
-static unsigned int ps3vram_cache_match(struct mtd_info *mtd, loff_t address)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	struct ps3vram_cache *cache = &priv->cache;
-	unsigned int base;
-	unsigned int offset;
-	int i;
-	static int counter;
-
-	offset = (unsigned int) (address & (cache->page_size - 1));
-	base = (unsigned int) (address - offset);
-
-	/* fully associative check */
-	for (i = 0; i < cache->page_count; i++) {
-		if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
-		    cache->tags[i].address == base) {
-			dev_dbg(priv->dev, "%s:%d: found entry %d : 0x%08x\n",
-				__func__, __LINE__, i, cache->tags[i].address);
-			return i;
-		}
-	}
-
-	/* choose a random entry */
-	i = (jiffies + (counter++)) % cache->page_count;
-	dev_dbg(priv->dev, "%s:%d: using entry %d\n", __func__, __LINE__, i);
-
-	ps3vram_cache_evict(mtd, i);
-	ps3vram_cache_load(mtd, i, base);
-
-	return i;
-}
-
-static int ps3vram_cache_init(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	priv->cache.page_count = CACHE_PAGE_COUNT;
-	priv->cache.page_size = CACHE_PAGE_SIZE;
-	priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
-				   CACHE_PAGE_COUNT, GFP_KERNEL);
-	if (priv->cache.tags == NULL) {
-		dev_err(priv->dev, "%s:%d: could not allocate cache tags\n",
-			__func__, __LINE__);
-		return -ENOMEM;
-	}
-
-	dev_info(priv->dev, "created ram cache: %d entries, %d KiB each\n",
-		CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
-
-	return 0;
-}
-
-static void ps3vram_cache_cleanup(struct mtd_info *mtd)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	ps3vram_cache_flush(mtd);
-	kfree(priv->cache.tags);
-}
-
-static int ps3vram_erase(struct mtd_info *mtd, struct erase_info *instr)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-
-	if (instr->addr + instr->len > mtd->size)
-		return -EINVAL;
-
-	mutex_lock(&priv->lock);
-
-	ps3vram_cache_flush(mtd);
-
-	/* Set bytes to 0xFF */
-	memset_io(priv->ddr_base + instr->addr, 0xFF, instr->len);
-
-	mutex_unlock(&priv->lock);
-
-	instr->state = MTD_ERASE_DONE;
-	mtd_erase_callback(instr);
-
-	return 0;
-}
-
-static int ps3vram_read(struct mtd_info *mtd, loff_t from, size_t len,
-			size_t *retlen, u_char *buf)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	unsigned int cached, count;
-
-	dev_dbg(priv->dev, "%s:%d: from=0x%08x len=0x%zx\n", __func__, __LINE__,
-		(unsigned int)from, len);
-
-	if (from >= mtd->size)
-		return -EINVAL;
-
-	if (len > mtd->size - from)
-		len = mtd->size - from;
-
-	/* Copy from vram to buf */
-	count = len;
-	while (count) {
-		unsigned int offset, avail;
-		unsigned int entry;
-
-		offset = (unsigned int) (from & (priv->cache.page_size - 1));
-		avail  = priv->cache.page_size - offset;
-
-		mutex_lock(&priv->lock);
-
-		entry = ps3vram_cache_match(mtd, from);
-		cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
-
-		dev_dbg(priv->dev, "%s:%d: from=%08x cached=%08x offset=%08x "
-			"avail=%08x count=%08x\n", __func__, __LINE__,
-			(unsigned int)from, cached, offset, avail, count);
-
-		if (avail > count)
-			avail = count;
-		memcpy(buf, priv->xdr_buf + cached, avail);
-
-		mutex_unlock(&priv->lock);
-
-		buf += avail;
-		count -= avail;
-		from += avail;
-	}
-
-	*retlen = len;
-	return 0;
-}
-
-static int ps3vram_write(struct mtd_info *mtd, loff_t to, size_t len,
-			 size_t *retlen, const u_char *buf)
-{
-	struct ps3vram_priv *priv = mtd->priv;
-	unsigned int cached, count;
-
-	if (to >= mtd->size)
-		return -EINVAL;
-
-	if (len > mtd->size - to)
-		len = mtd->size - to;
-
-	/* Copy from buf to vram */
-	count = len;
-	while (count) {
-		unsigned int offset, avail;
-		unsigned int entry;
-
-		offset = (unsigned int) (to & (priv->cache.page_size - 1));
-		avail  = priv->cache.page_size - offset;
-
-		mutex_lock(&priv->lock);
-
-		entry = ps3vram_cache_match(mtd, to);
-		cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
-
-		dev_dbg(priv->dev, "%s:%d: to=%08x cached=%08x offset=%08x "
-			"avail=%08x count=%08x\n", __func__, __LINE__,
-			(unsigned int)to, cached, offset, avail, count);
-
-		if (avail > count)
-			avail = count;
-		memcpy(priv->xdr_buf + cached, buf, avail);
-
-		priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
-
-		mutex_unlock(&priv->lock);
-
-		buf += avail;
-		count -= avail;
-		to += avail;
-	}
-
-	*retlen = len;
-	return 0;
-}
-
-static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
-{
-	struct ps3vram_priv *priv;
-	int status;
-	u64 ddr_lpar;
-	u64 ctrl_lpar;
-	u64 info_lpar;
-	u64 reports_lpar;
-	u64 ddr_size;
-	u64 reports_size;
-	int ret = -ENOMEM;
-	char *rest;
-
-	ret = -EIO;
-	ps3vram_mtd.priv = kzalloc(sizeof(struct ps3vram_priv), GFP_KERNEL);
-	if (!ps3vram_mtd.priv)
-		goto out;
-	priv = ps3vram_mtd.priv;
-
-	mutex_init(&priv->lock);
-	priv->dev = &dev->core;
-
-	/* Allocate XDR buffer (1MiB aligned) */
-	priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
-		get_order(XDR_BUF_SIZE));
-	if (priv->xdr_buf == NULL) {
-		dev_dbg(&dev->core, "%s:%d: could not allocate XDR buffer\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_priv;
-	}
-
-	/* Put FIFO at begginning of XDR buffer */
-	priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
-	priv->fifo_ptr = priv->fifo_base;
-
-	/* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
-	if (ps3_open_hv_device(dev)) {
-		dev_err(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
-			__func__, __LINE__);
-		ret = -EAGAIN;
-		goto out_close_gpu;
-	}
-
-	/* Request memory */
-	status = -1;
-	ddr_size = memparse(size, &rest);
-	if (*rest == '-')
-		ddr_size -= ps3fb_videomemory.size;
-	ddr_size = ALIGN(ddr_size, 1024*1024);
-	if (ddr_size <= 0) {
-		dev_err(&dev->core, "%s:%d: specified size is too small\n",
-			__func__, __LINE__);
-		ret = -EINVAL;
-		goto out_close_gpu;
-	}
-
-	while (ddr_size > 0) {
-		status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
-						 &priv->memory_handle,
-						 &ddr_lpar);
-		if (!status)
-			break;
-		ddr_size -= 1024*1024;
-	}
-	if (status || ddr_size <= 0) {
-		dev_err(&dev->core, "%s:%d: lv1_gpu_memory_allocate failed\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_xdr_buf;
-	}
-
-	/* Request context */
-	status = lv1_gpu_context_allocate(priv->memory_handle,
-					  0,
-					  &priv->context_handle,
-					  &ctrl_lpar,
-					  &info_lpar,
-					  &reports_lpar,
-					  &reports_size);
-	if (status) {
-		dev_err(&dev->core, "%s:%d: lv1_gpu_context_allocate failed\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_memory;
-	}
-
-	/* Map XDR buffer to RSX */
-	status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
-				       ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
-				       XDR_BUF_SIZE, 0);
-	if (status) {
-		dev_err(&dev->core, "%s:%d: lv1_gpu_context_iomap failed\n",
-			__func__, __LINE__);
-		ret = -ENOMEM;
-		goto out_free_context;
-	}
-
-	priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE);
-
-	if (!priv->ddr_base) {
-		dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
-			__LINE__);
-		ret = -ENOMEM;
-		goto out_free_context;
-	}
-
-	priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
-	if (!priv->ctrl) {
-		dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
-			__LINE__);
-		ret = -ENOMEM;
-		goto out_unmap_vram;
-	}
-
-	priv->reports = ioremap(reports_lpar, reports_size);
-	if (!priv->reports) {
-		dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
-			__LINE__);
-		ret = -ENOMEM;
-		goto out_unmap_ctrl;
-	}
-
-	mutex_lock(&ps3_gpu_mutex);
-	ps3vram_init_ring(&ps3vram_mtd);
-	mutex_unlock(&ps3_gpu_mutex);
-
-	ps3vram_mtd.name = "ps3vram";
-	ps3vram_mtd.size = ddr_size;
-	ps3vram_mtd.flags = MTD_CAP_RAM;
-	ps3vram_mtd.erase = ps3vram_erase;
-	ps3vram_mtd.point = NULL;
-	ps3vram_mtd.unpoint = NULL;
-	ps3vram_mtd.read = ps3vram_read;
-	ps3vram_mtd.write = ps3vram_write;
-	ps3vram_mtd.owner = THIS_MODULE;
-	ps3vram_mtd.type = MTD_RAM;
-	ps3vram_mtd.erasesize = CACHE_PAGE_SIZE;
-	ps3vram_mtd.writesize = 1;
-
-	ps3vram_bind(&ps3vram_mtd);
-
-	mutex_lock(&ps3_gpu_mutex);
-	ret = ps3vram_wait_ring(&ps3vram_mtd, 100);
-	mutex_unlock(&ps3_gpu_mutex);
-	if (ret < 0) {
-		dev_err(&dev->core, "%s:%d: failed to initialize channels\n",
-			__func__, __LINE__);
-		ret = -ETIMEDOUT;
-		goto out_unmap_reports;
-	}
-
-	ps3vram_cache_init(&ps3vram_mtd);
-
-	if (add_mtd_device(&ps3vram_mtd)) {
-		dev_err(&dev->core, "%s:%d: add_mtd_device failed\n",
-			__func__, __LINE__);
-		ret = -EAGAIN;
-		goto out_cache_cleanup;
-	}
-
-	dev_info(&dev->core, "reserved %u MiB of gpu memory\n",
-		(unsigned int)(ddr_size / 1024 / 1024));
-
-	return 0;
-
-out_cache_cleanup:
-	ps3vram_cache_cleanup(&ps3vram_mtd);
-out_unmap_reports:
-	iounmap(priv->reports);
-out_unmap_ctrl:
-	iounmap(priv->ctrl);
-out_unmap_vram:
-	iounmap(priv->ddr_base);
-out_free_context:
-	lv1_gpu_context_free(priv->context_handle);
-out_free_memory:
-	lv1_gpu_memory_free(priv->memory_handle);
-out_close_gpu:
-	ps3_close_hv_device(dev);
-out_free_xdr_buf:
-	free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
-out_free_priv:
-	kfree(ps3vram_mtd.priv);
-	ps3vram_mtd.priv = NULL;
-out:
-	return ret;
-}
-
-static int ps3vram_shutdown(struct ps3_system_bus_device *dev)
-{
-	struct ps3vram_priv *priv;
-
-	priv = ps3vram_mtd.priv;
-
-	del_mtd_device(&ps3vram_mtd);
-	ps3vram_cache_cleanup(&ps3vram_mtd);
-	iounmap(priv->reports);
-	iounmap(priv->ctrl);
-	iounmap(priv->ddr_base);
-	lv1_gpu_context_free(priv->context_handle);
-	lv1_gpu_memory_free(priv->memory_handle);
-	ps3_close_hv_device(dev);
-	free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
-	kfree(priv);
-	return 0;
-}
-
-static struct ps3_system_bus_driver ps3vram_driver = {
-	.match_id	= PS3_MATCH_ID_GPU,
-	.match_sub_id	= PS3_MATCH_SUB_ID_GPU_RAMDISK,
-	.core.name	= DEVICE_NAME,
-	.core.owner	= THIS_MODULE,
-	.probe		= ps3vram_probe,
-	.remove		= ps3vram_shutdown,
-	.shutdown	= ps3vram_shutdown,
-};
-
-static int __init ps3vram_init(void)
-{
-	return ps3_system_bus_driver_register(&ps3vram_driver);
-}
-
-static void __exit ps3vram_exit(void)
-{
-	ps3_system_bus_driver_unregister(&ps3vram_driver);
-}
-
-module_init(ps3vram_init);
-module_exit(ps3vram_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jim Paris <jim@jtan.com>");
-MODULE_DESCRIPTION("MTD driver for PS3 video RAM");
-MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 043d50fb6ef..729f899a5cd 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -551,5 +551,15 @@ config MTD_PLATRAM
 
 	  This selection automatically selects the map_ram driver.
 
-endmenu
+config MTD_VMU
+	tristate "Map driver for Dreamcast VMU"
+	depends on MAPLE
+	help
+	  This driver enables access to the Dreamcast Visual Memory Unit (VMU).
+
+	  Most Dreamcast users will want to say Y here.
 
+	  To build this as a module select M here, the module will be called
+	  vmu-flash.
+
+endmenu
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 6d9ba35caf1..26b28a7a90b 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -61,3 +61,4 @@ obj-$(CONFIG_MTD_PLATRAM)	+= plat-ram.o
 obj-$(CONFIG_MTD_OMAP_NOR)	+= omap_nor.o
 obj-$(CONFIG_MTD_INTEL_VR_NOR)	+= intel_vr_nor.o
 obj-$(CONFIG_MTD_BFIN_ASYNC)	+= bfin-async-flash.o
+obj-$(CONFIG_MTD_VMU)		+= vmu-flash.o
diff --git a/drivers/mtd/maps/pxa2xx-flash.c b/drivers/mtd/maps/pxa2xx-flash.c
index 771139c5bf8..e9026cb1c5b 100644
--- a/drivers/mtd/maps/pxa2xx-flash.c
+++ b/drivers/mtd/maps/pxa2xx-flash.c
@@ -41,9 +41,8 @@ struct pxa2xx_flash_info {
 static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
 
 
-static int __init pxa2xx_flash_probe(struct device *dev)
+static int __init pxa2xx_flash_probe(struct platform_device *pdev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
 	struct flash_platform_data *flash = pdev->dev.platform_data;
 	struct pxa2xx_flash_info *info;
 	struct mtd_partition *parts;
@@ -114,15 +113,15 @@ static int __init pxa2xx_flash_probe(struct device *dev)
 		add_mtd_device(info->mtd);
 	}
 
-	dev_set_drvdata(dev, info);
+	platform_set_drvdata(pdev, info);
 	return 0;
 }
 
-static int __exit pxa2xx_flash_remove(struct device *dev)
+static int __exit pxa2xx_flash_remove(struct platform_device *dev)
 {
-	struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
 
-	dev_set_drvdata(dev, NULL);
+	platform_set_drvdata(dev, NULL);
 
 #ifdef CONFIG_MTD_PARTITIONS
 	if (info->nr_parts)
@@ -141,9 +140,9 @@ static int __exit pxa2xx_flash_remove(struct device *dev)
 }
 
 #ifdef CONFIG_PM
-static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state)
+static int pxa2xx_flash_suspend(struct platform_device *dev, pm_message_t state)
 {
-	struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
 	int ret = 0;
 
 	if (info->mtd && info->mtd->suspend)
@@ -151,17 +150,17 @@ static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state)
 	return ret;
 }
 
-static int pxa2xx_flash_resume(struct device *dev)
+static int pxa2xx_flash_resume(struct platform_device *dev)
 {
-	struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
 
 	if (info->mtd && info->mtd->resume)
 		info->mtd->resume(info->mtd);
 	return 0;
 }
-static void pxa2xx_flash_shutdown(struct device *dev)
+static void pxa2xx_flash_shutdown(struct platform_device *dev)
 {
-	struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
 
 	if (info && info->mtd->suspend(info->mtd) == 0)
 		info->mtd->resume(info->mtd);
@@ -172,11 +171,13 @@ static void pxa2xx_flash_shutdown(struct device *dev)
 #define pxa2xx_flash_shutdown NULL
 #endif
 
-static struct device_driver pxa2xx_flash_driver = {
-	.name		= "pxa2xx-flash",
-	.bus		= &platform_bus_type,
+static struct platform_driver pxa2xx_flash_driver = {
+	.driver = {
+		.name		= "pxa2xx-flash",
+		.owner		= THIS_MODULE,
+	},
 	.probe		= pxa2xx_flash_probe,
-	.remove		= __exit_p(pxa2xx_flash_remove),
+	.remove		= __devexit_p(pxa2xx_flash_remove),
 	.suspend	= pxa2xx_flash_suspend,
 	.resume		= pxa2xx_flash_resume,
 	.shutdown	= pxa2xx_flash_shutdown,
@@ -184,12 +185,12 @@ static struct device_driver pxa2xx_flash_driver = {
 
 static int __init init_pxa2xx_flash(void)
 {
-	return driver_register(&pxa2xx_flash_driver);
+	return platform_driver_register(&pxa2xx_flash_driver);
 }
 
 static void __exit cleanup_pxa2xx_flash(void)
 {
-	driver_unregister(&pxa2xx_flash_driver);
+	platform_driver_unregister(&pxa2xx_flash_driver);
 }
 
 module_init(init_pxa2xx_flash);
diff --git a/drivers/mtd/maps/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c
new file mode 100644
index 00000000000..1f73297e777
--- /dev/null
+++ b/drivers/mtd/maps/vmu-flash.c
@@ -0,0 +1,832 @@
+/* vmu-flash.c
+ * Driver for SEGA Dreamcast Visual Memory Unit
+ *
+ * Copyright (c) Adrian McMenamin 2002 - 2009
+ * Copyright (c) Paul Mundt 2001
+ *
+ * Licensed under version 2 of the
+ * GNU General Public Licence
+ */
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/maple.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+
+struct vmu_cache {
+	unsigned char *buffer;		/* Cache */
+	unsigned int block;		/* Which block was cached */
+	unsigned long jiffies_atc;	/* When was it cached? */
+	int valid;
+};
+
+struct mdev_part {
+	struct maple_device *mdev;
+	int partition;
+};
+
+struct vmupart {
+	u16 user_blocks;
+	u16 root_block;
+	u16 numblocks;
+	char *name;
+	struct vmu_cache *pcache;
+};
+
+struct memcard {
+	u16 tempA;
+	u16 tempB;
+	u32 partitions;
+	u32 blocklen;
+	u32 writecnt;
+	u32 readcnt;
+	u32 removeable;
+	int partition;
+	int read;
+	unsigned char *blockread;
+	struct vmupart *parts;
+	struct mtd_info *mtd;
+};
+
+struct vmu_block {
+	unsigned int num; /* block number */
+	unsigned int ofs; /* block offset */
+};
+
+static struct vmu_block *ofs_to_block(unsigned long src_ofs,
+	struct mtd_info *mtd, int partition)
+{
+	struct vmu_block *vblock;
+	struct maple_device *mdev;
+	struct memcard *card;
+	struct mdev_part *mpart;
+	int num;
+
+	mpart = mtd->priv;
+	mdev = mpart->mdev;
+	card = maple_get_drvdata(mdev);
+
+	if (src_ofs >= card->parts[partition].numblocks * card->blocklen)
+		goto failed;
+
+	num = src_ofs / card->blocklen;
+	if (num > card->parts[partition].numblocks)
+		goto failed;
+
+	vblock = kmalloc(sizeof(struct vmu_block), GFP_KERNEL);
+	if (!vblock)
+		goto failed;
+
+	vblock->num = num;
+	vblock->ofs = src_ofs % card->blocklen;
+	return vblock;
+
+failed:
+	return NULL;
+}
+
+/* Maple bus callback function for reads */
+static void vmu_blockread(struct mapleq *mq)
+{
+	struct maple_device *mdev;
+	struct memcard *card;
+
+	mdev = mq->dev;
+	card = maple_get_drvdata(mdev);
+	/* copy the read in data */
+
+	if (unlikely(!card->blockread))
+		return;
+
+	memcpy(card->blockread, mq->recvbuf->buf + 12,
+		card->blocklen/card->readcnt);
+
+}
+
+/* Interface with maple bus to read blocks
+ * caching the results so that other parts
+ * of the driver can access block reads */
+static int maple_vmu_read_block(unsigned int num, unsigned char *buf,
+	struct mtd_info *mtd)
+{
+	struct memcard *card;
+	struct mdev_part *mpart;
+	struct maple_device *mdev;
+	int partition, error = 0, x, wait;
+	unsigned char *blockread = NULL;
+	struct vmu_cache *pcache;
+	__be32 sendbuf;
+
+	mpart = mtd->priv;
+	mdev = mpart->mdev;
+	partition = mpart->partition;
+	card = maple_get_drvdata(mdev);
+	pcache = card->parts[partition].pcache;
+	pcache->valid = 0;
+
+	/* prepare the cache for this block */
+	if (!pcache->buffer) {
+		pcache->buffer = kmalloc(card->blocklen, GFP_KERNEL);
+		if (!pcache->buffer) {
+			dev_err(&mdev->dev, "VMU at (%d, %d) - read fails due"
+				" to lack of memory\n", mdev->port,
+				mdev->unit);
+			error = -ENOMEM;
+			goto outB;
+		}
+	}
+
+	/*
+	* Reads may be phased - again the hardware spec
+	* supports this - though may not be any devices in
+	* the wild that implement it, but we will here
+	*/
+	for (x = 0; x < card->readcnt; x++) {
+		sendbuf = cpu_to_be32(partition << 24 | x << 16 | num);
+
+		if (atomic_read(&mdev->busy) == 1) {
+			wait_event_interruptible_timeout(mdev->maple_wait,
+				atomic_read(&mdev->busy) == 0, HZ);
+			if (atomic_read(&mdev->busy) == 1) {
+				dev_notice(&mdev->dev, "VMU at (%d, %d)"
+					" is busy\n", mdev->port, mdev->unit);
+				error = -EAGAIN;
+				goto outB;
+			}
+		}
+
+		atomic_set(&mdev->busy, 1);
+		blockread = kmalloc(card->blocklen/card->readcnt, GFP_KERNEL);
+		if (!blockread) {
+			error = -ENOMEM;
+			atomic_set(&mdev->busy, 0);
+			goto outB;
+		}
+		card->blockread = blockread;
+
+		maple_getcond_callback(mdev, vmu_blockread, 0,
+			MAPLE_FUNC_MEMCARD);
+		error = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
+				MAPLE_COMMAND_BREAD, 2, &sendbuf);
+		/* Very long timeouts seem to be needed when box is stressed */
+		wait = wait_event_interruptible_timeout(mdev->maple_wait,
+			(atomic_read(&mdev->busy) == 0 ||
+			atomic_read(&mdev->busy) == 2), HZ * 3);
+		/*
+		* MTD layer does not handle hotplugging well
+		* so have to return errors when VMU is unplugged
+		* in the middle of a read (busy == 2)
+		*/
+		if (error || atomic_read(&mdev->busy) == 2) {
+			if (atomic_read(&mdev->busy) == 2)
+				error = -ENXIO;
+			atomic_set(&mdev->busy, 0);
+			card->blockread = NULL;
+			goto outA;
+		}
+		if (wait == 0 || wait == -ERESTARTSYS) {
+			card->blockread = NULL;
+			atomic_set(&mdev->busy, 0);
+			error = -EIO;
+			list_del_init(&(mdev->mq->list));
+			kfree(mdev->mq->sendbuf);
+			mdev->mq->sendbuf = NULL;
+			if (wait == -ERESTARTSYS) {
+				dev_warn(&mdev->dev, "VMU read on (%d, %d)"
+					" interrupted on block 0x%X\n",
+					mdev->port, mdev->unit, num);
+			} else
+				dev_notice(&mdev->dev, "VMU read on (%d, %d)"
+					" timed out on block 0x%X\n",
+					mdev->port, mdev->unit, num);
+			goto outA;
+		}
+
+		memcpy(buf + (card->blocklen/card->readcnt) * x, blockread,
+			card->blocklen/card->readcnt);
+
+		memcpy(pcache->buffer + (card->blocklen/card->readcnt) * x,
+			card->blockread, card->blocklen/card->readcnt);
+		card->blockread = NULL;
+		pcache->block = num;
+		pcache->jiffies_atc = jiffies;
+		pcache->valid = 1;
+		kfree(blockread);
+	}
+
+	return error;
+
+outA:
+	kfree(blockread);
+outB:
+	return error;
+}
+
+/* communicate with maple bus for phased writing */
+static int maple_vmu_write_block(unsigned int num, const unsigned char *buf,
+	struct mtd_info *mtd)
+{
+	struct memcard *card;
+	struct mdev_part *mpart;
+	struct maple_device *mdev;
+	int partition, error, locking, x, phaselen, wait;
+	__be32 *sendbuf;
+
+	mpart = mtd->priv;
+	mdev = mpart->mdev;
+	partition = mpart->partition;
+	card = maple_get_drvdata(mdev);
+
+	phaselen = card->blocklen/card->writecnt;
+
+	sendbuf = kmalloc(phaselen + 4, GFP_KERNEL);
+	if (!sendbuf) {
+		error = -ENOMEM;
+		goto fail_nosendbuf;
+	}
+	for (x = 0; x < card->writecnt; x++) {
+		sendbuf[0] = cpu_to_be32(partition << 24 | x << 16 | num);
+		memcpy(&sendbuf[1], buf + phaselen * x, phaselen);
+		/* wait until the device is not busy doing something else
+		* or 1 second - which ever is longer */
+		if (atomic_read(&mdev->busy) == 1) {
+			wait_event_interruptible_timeout(mdev->maple_wait,
+				atomic_read(&mdev->busy) == 0, HZ);
+			if (atomic_read(&mdev->busy) == 1) {
+				error = -EBUSY;
+				dev_notice(&mdev->dev, "VMU write at (%d, %d)"
+					"failed - device is busy\n",
+					mdev->port, mdev->unit);
+				goto fail_nolock;
+			}
+		}
+		atomic_set(&mdev->busy, 1);
+
+		locking = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
+			MAPLE_COMMAND_BWRITE, phaselen / 4 + 2, sendbuf);
+		wait = wait_event_interruptible_timeout(mdev->maple_wait,
+			atomic_read(&mdev->busy) == 0, HZ/10);
+		if (locking) {
+			error = -EIO;
+			atomic_set(&mdev->busy, 0);
+			goto fail_nolock;
+		}
+		if (atomic_read(&mdev->busy) == 2) {
+			atomic_set(&mdev->busy, 0);
+		} else if (wait == 0 || wait == -ERESTARTSYS) {
+			error = -EIO;
+			dev_warn(&mdev->dev, "Write at (%d, %d) of block"
+				" 0x%X at phase %d failed: could not"
+				" communicate with VMU", mdev->port,
+				mdev->unit, num, x);
+			atomic_set(&mdev->busy, 0);
+			kfree(mdev->mq->sendbuf);
+			mdev->mq->sendbuf = NULL;
+			list_del_init(&(mdev->mq->list));
+			goto fail_nolock;
+		}
+	}
+	kfree(sendbuf);
+
+	return card->blocklen;
+
+fail_nolock:
+	kfree(sendbuf);
+fail_nosendbuf:
+	dev_err(&mdev->dev, "VMU (%d, %d): write failed\n", mdev->port,
+		mdev->unit);
+	return error;
+}
+
+/* mtd function to simulate reading byte by byte */
+static unsigned char vmu_flash_read_char(unsigned long ofs, int *retval,
+	struct mtd_info *mtd)
+{
+	struct vmu_block *vblock;
+	struct memcard *card;
+	struct mdev_part *mpart;
+	struct maple_device *mdev;
+	unsigned char *buf, ret;
+	int partition, error;
+
+	mpart = mtd->priv;
+	mdev = mpart->mdev;
+	partition = mpart->partition;
+	card = maple_get_drvdata(mdev);
+	*retval =  0;
+
+	buf = kmalloc(card->blocklen, GFP_KERNEL);
+	if (!buf) {
+		*retval = 1;
+		ret = -ENOMEM;
+		goto finish;
+	}
+
+	vblock = ofs_to_block(ofs, mtd, partition);
+	if (!vblock) {
+		*retval = 3;
+		ret = -ENOMEM;
+		goto out_buf;
+	}
+
+	error = maple_vmu_read_block(vblock->num, buf, mtd);
+	if (error) {
+		ret = error;
+		*retval = 2;
+		goto out_vblock;
+	}
+
+	ret = buf[vblock->ofs];
+
+out_vblock:
+	kfree(vblock);
+out_buf:
+	kfree(buf);
+finish:
+	return ret;
+}
+
+/* mtd higher order function to read flash */
+static int vmu_flash_read(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen,  u_char *buf)
+{
+	struct maple_device *mdev;
+	struct memcard *card;
+	struct mdev_part *mpart;
+	struct vmu_cache *pcache;
+	struct vmu_block *vblock;
+	int index = 0, retval, partition, leftover, numblocks;
+	unsigned char cx;
+
+	if (len < 1)
+		return -EIO;
+
+	mpart = mtd->priv;
+	mdev = mpart->mdev;
+	partition = mpart->partition;
+	card = maple_get_drvdata(mdev);
+
+	numblocks = card->parts[partition].numblocks;
+	if (from + len > numblocks * card->blocklen)
+		len = numblocks * card->blocklen - from;
+	if (len == 0)
+		return -EIO;
+	/* Have we cached this bit already? */
+	pcache = card->parts[partition].pcache;
+	do {
+		vblock =  ofs_to_block(from + index, mtd, partition);
+		if (!vblock)
+			return -ENOMEM;
+		/* Have we cached this and is the cache valid and timely? */
+		if (pcache->valid &&
+			time_before(jiffies, pcache->jiffies_atc + HZ) &&
+			(pcache->block == vblock->num)) {
+			/* we have cached it, so do necessary copying */
+			leftover = card->blocklen - vblock->ofs;
+			if (vblock->ofs + len - index < card->blocklen) {
+				/* only a bit of this block to copy */
+				memcpy(buf + index,
+					pcache->buffer + vblock->ofs,
+					len - index);
+				index = len;
+			} else {
+				/* otherwise copy remainder of whole block */
+				memcpy(buf + index, pcache->buffer +
+					vblock->ofs, leftover);
+				index += leftover;
+			}
+		} else {
+			/*
+			* Not cached so read one byte -
+			* but cache the rest of the block
+			*/
+			cx = vmu_flash_read_char(from + index, &retval, mtd);
+			if (retval) {
+				*retlen = index;
+				kfree(vblock);
+				return cx;
+			}
+			memset(buf + index, cx, 1);
+			index++;
+		}
+		kfree(vblock);
+	} while (len > index);
+	*retlen = index;
+
+	return 0;
+}
+
+static int vmu_flash_write(struct mtd_info *mtd, loff_t to, size_t len,
+	size_t *retlen, const u_char *buf)
+{
+	struct maple_device *mdev;
+	struct memcard *card;
+	struct mdev_part *mpart;
+	int index = 0, partition, error = 0, numblocks;
+	struct vmu_cache *pcache;
+	struct vmu_block *vblock;
+	unsigned char *buffer;
+
+	mpart = mtd->priv;
+	mdev = mpart->mdev;
+	partition = mpart->partition;
+	card = maple_get_drvdata(mdev);
+
+	/* simple sanity checks */
+	if (len < 1) {
+		error = -EIO;
+		goto failed;
+	}
+	numblocks = card->parts[partition].numblocks;
+	if (to + len > numblocks * card->blocklen)
+		len = numblocks * card->blocklen - to;
+	if (len == 0) {
+		error = -EIO;
+		goto failed;
+	}
+
+	vblock = ofs_to_block(to, mtd, partition);
+	if (!vblock) {
+		error = -ENOMEM;
+		goto failed;
+	}
+
+	buffer = kmalloc(card->blocklen, GFP_KERNEL);
+	if (!buffer) {
+		error = -ENOMEM;
+		goto fail_buffer;
+	}
+
+	do {
+		/* Read in the block we are to write to */
+		error = maple_vmu_read_block(vblock->num, buffer, mtd);
+		if (error)
+			goto fail_io;
+
+		do {
+			buffer[vblock->ofs] = buf[index];
+			vblock->ofs++;
+			index++;
+			if (index >= len)
+				break;
+		} while (vblock->ofs < card->blocklen);
+
+		/* write out new buffer */
+		error = maple_vmu_write_block(vblock->num, buffer, mtd);
+		/* invalidate the cache */
+		pcache = card->parts[partition].pcache;
+		pcache->valid = 0;
+
+		if (error != card->blocklen)
+			goto fail_io;
+
+		vblock->num++;
+		vblock->ofs = 0;
+	} while (len > index);
+
+	kfree(buffer);
+	*retlen = index;
+	kfree(vblock);
+	return 0;
+
+fail_io:
+	kfree(buffer);
+fail_buffer:
+	kfree(vblock);
+failed:
+	dev_err(&mdev->dev, "VMU write failing with error %d\n", error);
+	return error;
+}
+
+static void vmu_flash_sync(struct mtd_info *mtd)
+{
+	/* Do nothing here */
+}
+
+/* Maple bus callback function to recursively query hardware details */
+static void vmu_queryblocks(struct mapleq *mq)
+{
+	struct maple_device *mdev;
+	unsigned short *res;
+	struct memcard *card;
+	__be32 partnum;
+	struct vmu_cache *pcache;
+	struct mdev_part *mpart;
+	struct mtd_info *mtd_cur;
+	struct vmupart *part_cur;
+	int error;
+
+	mdev = mq->dev;
+	card = maple_get_drvdata(mdev);
+	res = (unsigned short *) (mq->recvbuf->buf);
+	card->tempA = res[12];
+	card->tempB = res[6];
+
+	dev_info(&mdev->dev, "VMU device at partition %d has %d user "
+		"blocks with a root block at %d\n", card->partition,
+		card->tempA, card->tempB);
+
+	part_cur = &card->parts[card->partition];
+	part_cur->user_blocks = card->tempA;
+	part_cur->root_block = card->tempB;
+	part_cur->numblocks = card->tempB + 1;
+	part_cur->name = kmalloc(12, GFP_KERNEL);
+	if (!part_cur->name)
+		goto fail_name;
+
+	sprintf(part_cur->name, "vmu%d.%d.%d",
+		mdev->port, mdev->unit, card->partition);
+	mtd_cur = &card->mtd[card->partition];
+	mtd_cur->name = part_cur->name;
+	mtd_cur->type = 8;
+	mtd_cur->flags = MTD_WRITEABLE|MTD_NO_ERASE;
+	mtd_cur->size = part_cur->numblocks * card->blocklen;
+	mtd_cur->erasesize = card->blocklen;
+	mtd_cur->write = vmu_flash_write;
+	mtd_cur->read = vmu_flash_read;
+	mtd_cur->sync = vmu_flash_sync;
+	mtd_cur->writesize = card->blocklen;
+
+	mpart = kmalloc(sizeof(struct mdev_part), GFP_KERNEL);
+	if (!mpart)
+		goto fail_mpart;
+
+	mpart->mdev = mdev;
+	mpart->partition = card->partition;
+	mtd_cur->priv = mpart;
+	mtd_cur->owner = THIS_MODULE;
+
+	pcache = kzalloc(sizeof(struct vmu_cache), GFP_KERNEL);
+	if (!pcache)
+		goto fail_cache_create;
+	part_cur->pcache = pcache;
+
+	error = add_mtd_device(mtd_cur);
+	if (error)
+		goto fail_mtd_register;
+
+	maple_getcond_callback(mdev, NULL, 0,
+		MAPLE_FUNC_MEMCARD);
+
+	/*
+	* Set up a recursive call to the (probably theoretical)
+	* second or more partition
+	*/
+	if (++card->partition < card->partitions) {
+		partnum = cpu_to_be32(card->partition << 24);
+		maple_getcond_callback(mdev, vmu_queryblocks, 0,
+			MAPLE_FUNC_MEMCARD);
+		maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
+			MAPLE_COMMAND_GETMINFO, 2, &partnum);
+	}
+	return;
+
+fail_mtd_register:
+	dev_err(&mdev->dev, "Could not register maple device at (%d, %d)"
+		"error is 0x%X\n", mdev->port, mdev->unit, error);
+	for (error = 0; error <= card->partition; error++) {
+		kfree(((card->parts)[error]).pcache);
+		((card->parts)[error]).pcache = NULL;
+	}
+fail_cache_create:
+fail_mpart:
+	for (error = 0; error <= card->partition; error++) {
+		kfree(((card->mtd)[error]).priv);
+		((card->mtd)[error]).priv = NULL;
+	}
+	maple_getcond_callback(mdev, NULL, 0,
+		MAPLE_FUNC_MEMCARD);
+	kfree(part_cur->name);
+fail_name:
+	return;
+}
+
+/* Handles very basic info about the flash, queries for details */
+static int __devinit vmu_connect(struct maple_device *mdev)
+{
+	unsigned long test_flash_data, basic_flash_data;
+	int c, error;
+	struct memcard *card;
+	u32 partnum = 0;
+
+	test_flash_data = be32_to_cpu(mdev->devinfo.function);
+	/* Need to count how many bits are set - to find out which
+	 * function_data element has details of the memory card:
+	 * using Brian Kernighan's/Peter Wegner's method */
+	for (c = 0; test_flash_data; c++)
+		test_flash_data &= test_flash_data - 1;
+
+	basic_flash_data = be32_to_cpu(mdev->devinfo.function_data[c - 1]);
+
+	card = kmalloc(sizeof(struct memcard), GFP_KERNEL);
+	if (!card) {
+		error = ENOMEM;
+		goto fail_nomem;
+	}
+
+	card->partitions = (basic_flash_data >> 24 & 0xFF) + 1;
+	card->blocklen = ((basic_flash_data >> 16 & 0xFF) + 1) << 5;
+	card->writecnt = basic_flash_data >> 12 & 0xF;
+	card->readcnt = basic_flash_data >> 8 & 0xF;
+	card->removeable = basic_flash_data >> 7 & 1;
+
+	card->partition = 0;
+
+	/*
+	* Not sure there are actually any multi-partition devices in the
+	* real world, but the hardware supports them, so, so will we
+	*/
+	card->parts = kmalloc(sizeof(struct vmupart) * card->partitions,
+		GFP_KERNEL);
+	if (!card->parts) {
+		error = -ENOMEM;
+		goto fail_partitions;
+	}
+
+	card->mtd = kmalloc(sizeof(struct mtd_info) * card->partitions,
+		GFP_KERNEL);
+	if (!card->mtd) {
+		error = -ENOMEM;
+		goto fail_mtd_info;
+	}
+
+	maple_set_drvdata(mdev, card);
+
+	/*
+	* We want to trap meminfo not get cond
+	* so set interval to zero, but rely on maple bus
+	* driver to pass back the results of the meminfo
+	*/
+	maple_getcond_callback(mdev, vmu_queryblocks, 0,
+		MAPLE_FUNC_MEMCARD);
+
+	/* Make sure we are clear to go */
+	if (atomic_read(&mdev->busy) == 1) {
+		wait_event_interruptible_timeout(mdev->maple_wait,
+			atomic_read(&mdev->busy) == 0, HZ);
+		if (atomic_read(&mdev->busy) == 1) {
+			dev_notice(&mdev->dev, "VMU at (%d, %d) is busy\n",
+				mdev->port, mdev->unit);
+			error = -EAGAIN;
+			goto fail_device_busy;
+		}
+	}
+
+	atomic_set(&mdev->busy, 1);
+
+	/*
+	* Set up the minfo call: vmu_queryblocks will handle
+	* the information passed back
+	*/
+	error = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
+		MAPLE_COMMAND_GETMINFO, 2, &partnum);
+	if (error) {
+		dev_err(&mdev->dev, "Could not lock VMU at (%d, %d)"
+			" error is 0x%X\n", mdev->port, mdev->unit, error);
+		goto fail_mtd_info;
+	}
+	return 0;
+
+fail_device_busy:
+	kfree(card->mtd);
+fail_mtd_info:
+	kfree(card->parts);
+fail_partitions:
+	kfree(card);
+fail_nomem:
+	return error;
+}
+
+static void __devexit vmu_disconnect(struct maple_device *mdev)
+{
+	struct memcard *card;
+	struct mdev_part *mpart;
+	int x;
+
+	mdev->callback = NULL;
+	card = maple_get_drvdata(mdev);
+	for (x = 0; x < card->partitions; x++) {
+		mpart = ((card->mtd)[x]).priv;
+		mpart->mdev = NULL;
+		del_mtd_device(&((card->mtd)[x]));
+		kfree(((card->parts)[x]).name);
+	}
+	kfree(card->parts);
+	kfree(card->mtd);
+	kfree(card);
+}
+
+/* Callback to handle eccentricities of both mtd subsystem
+ * and general flakyness of Dreamcast VMUs
+ */
+static int vmu_can_unload(struct maple_device *mdev)
+{
+	struct memcard *card;
+	int x;
+	struct mtd_info *mtd;
+
+	card = maple_get_drvdata(mdev);
+	for (x = 0; x < card->partitions; x++) {
+		mtd = &((card->mtd)[x]);
+		if (mtd->usecount > 0)
+			return 0;
+	}
+	return 1;
+}
+
+#define ERRSTR "VMU at (%d, %d) file error -"
+
+static void vmu_file_error(struct maple_device *mdev, void *recvbuf)
+{
+	enum maple_file_errors error = ((int *)recvbuf)[1];
+
+	switch (error) {
+
+	case MAPLE_FILEERR_INVALID_PARTITION:
+		dev_notice(&mdev->dev, ERRSTR " invalid partition number\n",
+			mdev->port, mdev->unit);
+		break;
+
+	case MAPLE_FILEERR_PHASE_ERROR:
+		dev_notice(&mdev->dev, ERRSTR " phase error\n",
+			mdev->port, mdev->unit);
+		break;
+
+	case MAPLE_FILEERR_INVALID_BLOCK:
+		dev_notice(&mdev->dev, ERRSTR " invalid block number\n",
+			mdev->port, mdev->unit);
+		break;
+
+	case MAPLE_FILEERR_WRITE_ERROR:
+		dev_notice(&mdev->dev, ERRSTR " write error\n",
+			mdev->port, mdev->unit);
+		break;
+
+	case MAPLE_FILEERR_INVALID_WRITE_LENGTH:
+		dev_notice(&mdev->dev, ERRSTR " invalid write length\n",
+			mdev->port, mdev->unit);
+		break;
+
+	case MAPLE_FILEERR_BAD_CRC:
+		dev_notice(&mdev->dev, ERRSTR " bad CRC\n",
+			mdev->port, mdev->unit);
+		break;
+
+	default:
+		dev_notice(&mdev->dev, ERRSTR " 0x%X\n",
+			mdev->port, mdev->unit, error);
+	}
+}
+
+
+static int __devinit probe_maple_vmu(struct device *dev)
+{
+	int error;
+	struct maple_device *mdev = to_maple_dev(dev);
+	struct maple_driver *mdrv = to_maple_driver(dev->driver);
+
+	mdev->can_unload = vmu_can_unload;
+	mdev->fileerr_handler = vmu_file_error;
+	mdev->driver = mdrv;
+
+	error = vmu_connect(mdev);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int __devexit remove_maple_vmu(struct device *dev)
+{
+	struct maple_device *mdev = to_maple_dev(dev);
+
+	vmu_disconnect(mdev);
+	return 0;
+}
+
+static struct maple_driver vmu_flash_driver = {
+	.function =	MAPLE_FUNC_MEMCARD,
+	.drv = {
+		.name =		"Dreamcast_visual_memory",
+		.probe =	probe_maple_vmu,
+		.remove = 	__devexit_p(remove_maple_vmu),
+	},
+};
+
+static int __init vmu_flash_map_init(void)
+{
+	return maple_driver_register(&vmu_flash_driver);
+}
+
+static void __exit vmu_flash_map_exit(void)
+{
+	maple_driver_unregister(&vmu_flash_driver);
+}
+
+module_init(vmu_flash_map_init);
+module_exit(vmu_flash_map_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Adrian McMenamin");
+MODULE_DESCRIPTION("Flash mapping for Sega Dreamcast visual memory");
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index 00d46e137b2..92285d0089c 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -81,13 +81,16 @@ static int get_sb_mtd_aux(struct file_system_type *fs_type, int flags,
 
 	/* go */
 	sb->s_flags |= MS_ACTIVE;
-	return simple_set_mnt(mnt, sb);
+	simple_set_mnt(mnt, sb);
+
+	return 0;
 
 	/* new mountpoint for an already mounted superblock */
 already_mounted:
 	DEBUG(1, "MTDSB: Device %d (\"%s\") is already mounted\n",
 	      mtd->index, mtd->name);
-	ret = simple_set_mnt(mnt, sb);
+	simple_set_mnt(mnt, sb);
+	ret = 0;
 	goto out_put;
 
 out_error:
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 8b12e6e109d..2ff88791ceb 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -273,7 +273,7 @@ config MTD_NAND_CAFE
 
 config MTD_NAND_CS553X
 	tristate "NAND support for CS5535/CS5536 (AMD Geode companion chip)"
-	depends on X86_32 && (X86_PC || X86_GENERICARCH)
+	depends on X86_32
 	help
 	  The CS553x companion chips for the AMD Geode processor
 	  include NAND flash controllers with built-in hardware ECC
diff --git a/drivers/mtd/nand/excite_nandflash.c b/drivers/mtd/nand/excite_nandflash.c
index ced14b5294d..72446fb48d4 100644
--- a/drivers/mtd/nand/excite_nandflash.c
+++ b/drivers/mtd/nand/excite_nandflash.c
@@ -128,11 +128,11 @@ static int excite_nand_devready(struct mtd_info *mtd)
  * The binding to the mtd and all allocated
  * resources are released.
  */
-static int __exit excite_nand_remove(struct device *dev)
+static int __exit excite_nand_remove(struct platform_device *dev)
 {
-	struct excite_nand_drvdata * const this = dev_get_drvdata(dev);
+	struct excite_nand_drvdata * const this = platform_get_drvdata(dev);
 
-	dev_set_drvdata(dev, NULL);
+	platform_set_drvdata(dev, NULL);
 
 	if (unlikely(!this)) {
 		printk(KERN_ERR "%s: called %s without private data!!",
@@ -159,9 +159,8 @@ static int __exit excite_nand_remove(struct device *dev)
  * it can allocate all necessary resources then calls the
  * nand layer to look for devices.
 */
-static int __init excite_nand_probe(struct device *dev)
+static int __init excite_nand_probe(struct platform_device *pdev)
 {
-	struct platform_device * const pdev = to_platform_device(dev);
 	struct excite_nand_drvdata *drvdata;	/* private driver data */
 	struct nand_chip *board_chip;	/* private flash chip data */
 	struct mtd_info *board_mtd;	/* mtd info for this board */
@@ -175,7 +174,7 @@ static int __init excite_nand_probe(struct device *dev)
 	}
 
 	/* bind private data into driver */
-	dev_set_drvdata(dev, drvdata);
+	platform_set_drvdata(pdev, drvdata);
 
 	/* allocate and map the resource */
 	drvdata->regs =
@@ -219,23 +218,25 @@ static int __init excite_nand_probe(struct device *dev)
 	return 0;
 }
 
-static struct device_driver excite_nand_driver = {
-	.name = "excite_nand",
-	.bus = &platform_bus_type,
+static struct platform_driver excite_nand_driver = {
+	.driver = {
+		.name = "excite_nand",
+		.owner		= THIS_MODULE,
+	},
 	.probe = excite_nand_probe,
-	.remove = __exit_p(excite_nand_remove)
+	.remove = __devexit_p(excite_nand_remove)
 };
 
 static int __init excite_nand_init(void)
 {
 	pr_info("Basler eXcite nand flash driver Version "
 		EXCITE_NANDFLASH_VERSION "\n");
-	return driver_register(&excite_nand_driver);
+	return platform_driver_register(&excite_nand_driver);
 }
 
 static void __exit excite_nand_exit(void)
 {
-	driver_unregister(&excite_nand_driver);
+	platform_driver_unregister(&excite_nand_driver);
 }
 
 module_init(excite_nand_init);
diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c
index 582cf80f555..89bf85af642 100644
--- a/drivers/mtd/nand/ndfc.c
+++ b/drivers/mtd/nand/ndfc.c
@@ -187,7 +187,7 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
 		return -ENODEV;
 
 	ndfc->mtd.name = kasprintf(GFP_KERNEL, "%s.%s",
-				   ndfc->ofdev->dev.bus_id, flash_np->name);
+			dev_name(&ndfc->ofdev->dev), flash_np->name);
 	if (!ndfc->mtd.name) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c
index 5b69e7773c6..3a496c33fb5 100644
--- a/drivers/mtd/onenand/generic.c
+++ b/drivers/mtd/onenand/generic.c
@@ -36,10 +36,9 @@ struct onenand_info {
 	struct onenand_chip	onenand;
 };
 
-static int __devinit generic_onenand_probe(struct device *dev)
+static int __devinit generic_onenand_probe(struct platform_device *pdev)
 {
 	struct onenand_info *info;
-	struct platform_device *pdev = to_platform_device(dev);
 	struct flash_platform_data *pdata = pdev->dev.platform_data;
 	struct resource *res = pdev->resource;
 	unsigned long size = res->end - res->start + 1;
@@ -49,7 +48,7 @@ static int __devinit generic_onenand_probe(struct device *dev)
 	if (!info)
 		return -ENOMEM;
 
-	if (!request_mem_region(res->start, size, dev->driver->name)) {
+	if (!request_mem_region(res->start, size, pdev->dev.driver->name)) {
 		err = -EBUSY;
 		goto out_free_info;
 	}
@@ -82,7 +81,7 @@ static int __devinit generic_onenand_probe(struct device *dev)
 #endif
 		err = add_mtd_device(&info->mtd);
 
-	dev_set_drvdata(&pdev->dev, info);
+	platform_set_drvdata(pdev, info);
 
 	return 0;
 
@@ -96,14 +95,13 @@ out_free_info:
 	return err;
 }
 
-static int __devexit generic_onenand_remove(struct device *dev)
+static int __devexit generic_onenand_remove(struct platform_device *pdev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct onenand_info *info = dev_get_drvdata(&pdev->dev);
+	struct onenand_info *info = platform_get_drvdata(pdev);
 	struct resource *res = pdev->resource;
 	unsigned long size = res->end - res->start + 1;
 
-	dev_set_drvdata(&pdev->dev, NULL);
+	platform_set_drvdata(pdev, NULL);
 
 	if (info) {
 		if (info->parts)
@@ -120,9 +118,11 @@ static int __devexit generic_onenand_remove(struct device *dev)
 	return 0;
 }
 
-static struct device_driver generic_onenand_driver = {
-	.name		= DRIVER_NAME,
-	.bus		= &platform_bus_type,
+static struct platform_driver generic_onenand_driver = {
+	.driver = {
+		.name		= DRIVER_NAME,
+		.owner		= THIS_MODULE,
+	},
 	.probe		= generic_onenand_probe,
 	.remove		= __devexit_p(generic_onenand_remove),
 };
@@ -131,12 +131,12 @@ MODULE_ALIAS(DRIVER_NAME);
 
 static int __init generic_onenand_init(void)
 {
-	return driver_register(&generic_onenand_driver);
+	return platform_driver_register(&generic_onenand_driver);
 }
 
 static void __exit generic_onenand_exit(void)
 {
-	driver_unregister(&generic_onenand_driver);
+	platform_driver_unregister(&generic_onenand_driver);
 }
 
 module_init(generic_onenand_init);