Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (96 commits)
  sh: add support for SMSC Polaris platform
  sh: fix the HD64461 level-triggered interrupts handling
  sh: sh-rtc wakeup support
  sh: sh-rtc invalid time rework
  sh: sh-rtc carry interrupt rework
  sh: disallow kexec virtual entry
  sh: kexec jump: fix for ftrace.
  sh: kexec: Drop SR.BL bit toggling.
  sh: add kexec jump support
  sh: rework kexec segment code
  sh: simplify kexec vbr code
  sh: Flush only the needed range when unmapping a VMA.
  sh: Update debugfs ASID dumping for 16-bit ASID support.
  sh: tlb-pteaex: Kill off legacy PTEA updates.
  sh: Support for extended ASIDs on PTEAEX-capable SH-X3 cores.
  sh: sh7763rdp: Change IRQ number for sh_eth of sh7763rdp
  sh: espt-giga board support
  sh: dma: Make G2 DMA configurable.
  sh: dma: Make PVR2 DMA configurable.
  sh: Move IRQ multi definition of DMAC to defconfig
  ...

18 files changed, 2043 insertions, 367 deletions

diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 1525882190fd..1efb2879a94f 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_ATMEL_TCB_CLKSRC)	+= tcb_clksrc.o
 obj-$(CONFIG_X86_CYCLONE_TIMER)	+= cyclone.o
 obj-$(CONFIG_X86_PM_TIMER)	+= acpi_pm.o
 obj-$(CONFIG_SCx200HR_TIMER)	+= scx200_hrt.o
+obj-$(CONFIG_SH_TIMER_CMT)	+= sh_cmt.o
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
new file mode 100644
index 000000000000..7783b42f6914
--- /dev/null
+++ b/drivers/clocksource/sh_cmt.c
@@ -0,0 +1,615 @@
+/*
+ * SuperH Timer Support - CMT
+ *
+ *  Copyright (C) 2008 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/err.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/sh_cmt.h>
+
+struct sh_cmt_priv {
+	void __iomem *mapbase;
+	struct clk *clk;
+	unsigned long width; /* 16 or 32 bit version of hardware block */
+	unsigned long overflow_bit;
+	unsigned long clear_bits;
+	struct irqaction irqaction;
+	struct platform_device *pdev;
+
+	unsigned long flags;
+	unsigned long match_value;
+	unsigned long next_match_value;
+	unsigned long max_match_value;
+	unsigned long rate;
+	spinlock_t lock;
+	struct clock_event_device ced;
+	unsigned long total_cycles;
+};
+
+static DEFINE_SPINLOCK(sh_cmt_lock);
+
+#define CMSTR -1 /* shared register */
+#define CMCSR 0 /* channel register */
+#define CMCNT 1 /* channel register */
+#define CMCOR 2 /* channel register */
+
+static inline unsigned long sh_cmt_read(struct sh_cmt_priv *p, int reg_nr)
+{
+	struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+	void __iomem *base = p->mapbase;
+	unsigned long offs;
+
+	if (reg_nr == CMSTR) {
+		offs = 0;
+		base -= cfg->channel_offset;
+	} else
+		offs = reg_nr;
+
+	if (p->width == 16)
+		offs <<= 1;
+	else {
+		offs <<= 2;
+		if ((reg_nr == CMCNT) || (reg_nr == CMCOR))
+			return ioread32(base + offs);
+	}
+
+	return ioread16(base + offs);
+}
+
+static inline void sh_cmt_write(struct sh_cmt_priv *p, int reg_nr,
+				unsigned long value)
+{
+	struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+	void __iomem *base = p->mapbase;
+	unsigned long offs;
+
+	if (reg_nr == CMSTR) {
+		offs = 0;
+		base -= cfg->channel_offset;
+	} else
+		offs = reg_nr;
+
+	if (p->width == 16)
+		offs <<= 1;
+	else {
+		offs <<= 2;
+		if ((reg_nr == CMCNT) || (reg_nr == CMCOR)) {
+			iowrite32(value, base + offs);
+			return;
+		}
+	}
+
+	iowrite16(value, base + offs);
+}
+
+static unsigned long sh_cmt_get_counter(struct sh_cmt_priv *p,
+					int *has_wrapped)
+{
+	unsigned long v1, v2, v3;
+
+	/* Make sure the timer value is stable. Stolen from acpi_pm.c */
+	do {
+		v1 = sh_cmt_read(p, CMCNT);
+		v2 = sh_cmt_read(p, CMCNT);
+		v3 = sh_cmt_read(p, CMCNT);
+	} while (unlikely((v1 > v2 && v1 < v3) || (v2 > v3 && v2 < v1)
+			  || (v3 > v1 && v3 < v2)));
+
+	*has_wrapped = sh_cmt_read(p, CMCSR) & p->overflow_bit;
+	return v2;
+}
+
+
+static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
+{
+	struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+	unsigned long flags, value;
+
+	/* start stop register shared by multiple timer channels */
+	spin_lock_irqsave(&sh_cmt_lock, flags);
+	value = sh_cmt_read(p, CMSTR);
+
+	if (start)
+		value |= 1 << cfg->timer_bit;
+	else
+		value &= ~(1 << cfg->timer_bit);
+
+	sh_cmt_write(p, CMSTR, value);
+	spin_unlock_irqrestore(&sh_cmt_lock, flags);
+}
+
+static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
+{
+	struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+	int ret;
+
+	/* enable clock */
+	ret = clk_enable(p->clk);
+	if (ret) {
+		pr_err("sh_cmt: cannot enable clock \"%s\"\n", cfg->clk);
+		return ret;
+	}
+	*rate = clk_get_rate(p->clk) / 8;
+
+	/* make sure channel is disabled */
+	sh_cmt_start_stop_ch(p, 0);
+
+	/* configure channel, periodic mode and maximum timeout */
+	if (p->width == 16)
+		sh_cmt_write(p, CMCSR, 0);
+	else
+		sh_cmt_write(p, CMCSR, 0x01a4);
+
+	sh_cmt_write(p, CMCOR, 0xffffffff);
+	sh_cmt_write(p, CMCNT, 0);
+
+	/* enable channel */
+	sh_cmt_start_stop_ch(p, 1);
+	return 0;
+}
+
+static void sh_cmt_disable(struct sh_cmt_priv *p)
+{
+	/* disable channel */
+	sh_cmt_start_stop_ch(p, 0);
+
+	/* stop clock */
+	clk_disable(p->clk);
+}
+
+/* private flags */
+#define FLAG_CLOCKEVENT (1 << 0)
+#define FLAG_CLOCKSOURCE (1 << 1)
+#define FLAG_REPROGRAM (1 << 2)
+#define FLAG_SKIPEVENT (1 << 3)
+#define FLAG_IRQCONTEXT (1 << 4)
+
+static void sh_cmt_clock_event_program_verify(struct sh_cmt_priv *p,
+					      int absolute)
+{
+	unsigned long new_match;
+	unsigned long value = p->next_match_value;
+	unsigned long delay = 0;
+	unsigned long now = 0;
+	int has_wrapped;
+
+	now = sh_cmt_get_counter(p, &has_wrapped);
+	p->flags |= FLAG_REPROGRAM; /* force reprogram */
+
+	if (has_wrapped) {
+		/* we're competing with the interrupt handler.
+		 *  -> let the interrupt handler reprogram the timer.
+		 *  -> interrupt number two handles the event.
+		 */
+		p->flags |= FLAG_SKIPEVENT;
+		return;
+	}
+
+	if (absolute)
+		now = 0;
+
+	do {
+		/* reprogram the timer hardware,
+		 * but don't save the new match value yet.
+		 */
+		new_match = now + value + delay;
+		if (new_match > p->max_match_value)
+			new_match = p->max_match_value;
+
+		sh_cmt_write(p, CMCOR, new_match);
+
+		now = sh_cmt_get_counter(p, &has_wrapped);
+		if (has_wrapped && (new_match > p->match_value)) {
+			/* we are changing to a greater match value,
+			 * so this wrap must be caused by the counter
+			 * matching the old value.
+			 * -> first interrupt reprograms the timer.
+			 * -> interrupt number two handles the event.
+			 */
+			p->flags |= FLAG_SKIPEVENT;
+			break;
+		}
+
+		if (has_wrapped) {
+			/* we are changing to a smaller match value,
+			 * so the wrap must be caused by the counter
+			 * matching the new value.
+			 * -> save programmed match value.
+			 * -> let isr handle the event.
+			 */
+			p->match_value = new_match;
+			break;
+		}
+
+		/* be safe: verify hardware settings */
+		if (now < new_match) {
+			/* timer value is below match value, all good.
+			 * this makes sure we won't miss any match events.
+			 * -> save programmed match value.
+			 * -> let isr handle the event.
+			 */
+			p->match_value = new_match;
+			break;
+		}
+
+		/* the counter has reached a value greater
+		 * than our new match value. and since the
+		 * has_wrapped flag isn't set we must have
+		 * programmed a too close event.
+		 * -> increase delay and retry.
+		 */
+		if (delay)
+			delay <<= 1;
+		else
+			delay = 1;
+
+		if (!delay)
+			pr_warning("sh_cmt: too long delay\n");
+
+	} while (delay);
+}
+
+static void sh_cmt_set_next(struct sh_cmt_priv *p, unsigned long delta)
+{
+	unsigned long flags;
+
+	if (delta > p->max_match_value)
+		pr_warning("sh_cmt: delta out of range\n");
+
+	spin_lock_irqsave(&p->lock, flags);
+	p->next_match_value = delta;
+	sh_cmt_clock_event_program_verify(p, 0);
+	spin_unlock_irqrestore(&p->lock, flags);
+}
+
+static irqreturn_t sh_cmt_interrupt(int irq, void *dev_id)
+{
+	struct sh_cmt_priv *p = dev_id;
+
+	/* clear flags */
+	sh_cmt_write(p, CMCSR, sh_cmt_read(p, CMCSR) & p->clear_bits);
+
+	/* update clock source counter to begin with if enabled
+	 * the wrap flag should be cleared by the timer specific
+	 * isr before we end up here.
+	 */
+	if (p->flags & FLAG_CLOCKSOURCE)
+		p->total_cycles += p->match_value;
+
+	if (!(p->flags & FLAG_REPROGRAM))
+		p->next_match_value = p->max_match_value;
+
+	p->flags |= FLAG_IRQCONTEXT;
+
+	if (p->flags & FLAG_CLOCKEVENT) {
+		if (!(p->flags & FLAG_SKIPEVENT)) {
+			if (p->ced.mode == CLOCK_EVT_MODE_ONESHOT) {
+				p->next_match_value = p->max_match_value;
+				p->flags |= FLAG_REPROGRAM;
+			}
+
+			p->ced.event_handler(&p->ced);
+		}
+	}
+
+	p->flags &= ~FLAG_SKIPEVENT;
+
+	if (p->flags & FLAG_REPROGRAM) {
+		p->flags &= ~FLAG_REPROGRAM;
+		sh_cmt_clock_event_program_verify(p, 1);
+
+		if (p->flags & FLAG_CLOCKEVENT)
+			if ((p->ced.mode == CLOCK_EVT_MODE_SHUTDOWN)
+			    || (p->match_value == p->next_match_value))
+				p->flags &= ~FLAG_REPROGRAM;
+	}
+
+	p->flags &= ~FLAG_IRQCONTEXT;
+
+	return IRQ_HANDLED;
+}
+
+static int sh_cmt_start(struct sh_cmt_priv *p, unsigned long flag)
+{
+	int ret = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&p->lock, flags);
+
+	if (!(p->flags & (FLAG_CLOCKEVENT | FLAG_CLOCKSOURCE)))
+		ret = sh_cmt_enable(p, &p->rate);
+
+	if (ret)
+		goto out;
+	p->flags |= flag;
+
+	/* setup timeout if no clockevent */
+	if ((flag == FLAG_CLOCKSOURCE) && (!(p->flags & FLAG_CLOCKEVENT)))
+		sh_cmt_set_next(p, p->max_match_value);
+ out:
+	spin_unlock_irqrestore(&p->lock, flags);
+
+	return ret;
+}
+
+static void sh_cmt_stop(struct sh_cmt_priv *p, unsigned long flag)
+{
+	unsigned long flags;
+	unsigned long f;
+
+	spin_lock_irqsave(&p->lock, flags);
+
+	f = p->flags & (FLAG_CLOCKEVENT | FLAG_CLOCKSOURCE);
+	p->flags &= ~flag;
+
+	if (f && !(p->flags & (FLAG_CLOCKEVENT | FLAG_CLOCKSOURCE)))
+		sh_cmt_disable(p);
+
+	/* adjust the timeout to maximum if only clocksource left */
+	if ((flag == FLAG_CLOCKEVENT) && (p->flags & FLAG_CLOCKSOURCE))
+		sh_cmt_set_next(p, p->max_match_value);
+
+	spin_unlock_irqrestore(&p->lock, flags);
+}
+
+static struct sh_cmt_priv *ced_to_sh_cmt(struct clock_event_device *ced)
+{
+	return container_of(ced, struct sh_cmt_priv, ced);
+}
+
+static void sh_cmt_clock_event_start(struct sh_cmt_priv *p, int periodic)
+{
+	struct clock_event_device *ced = &p->ced;
+
+	sh_cmt_start(p, FLAG_CLOCKEVENT);
+
+	/* TODO: calculate good shift from rate and counter bit width */
+
+	ced->shift = 32;
+	ced->mult = div_sc(p->rate, NSEC_PER_SEC, ced->shift);
+	ced->max_delta_ns = clockevent_delta2ns(p->max_match_value, ced);
+	ced->min_delta_ns = clockevent_delta2ns(0x1f, ced);
+
+	if (periodic)
+		sh_cmt_set_next(p, (p->rate + HZ/2) / HZ);
+	else
+		sh_cmt_set_next(p, p->max_match_value);
+}
+
+static void sh_cmt_clock_event_mode(enum clock_event_mode mode,
+				    struct clock_event_device *ced)
+{
+	struct sh_cmt_priv *p = ced_to_sh_cmt(ced);
+
+	/* deal with old setting first */
+	switch (ced->mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+	case CLOCK_EVT_MODE_ONESHOT:
+		sh_cmt_stop(p, FLAG_CLOCKEVENT);
+		break;
+	default:
+		break;
+	}
+
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		pr_info("sh_cmt: %s used for periodic clock events\n",
+			ced->name);
+		sh_cmt_clock_event_start(p, 1);
+		break;
+	case CLOCK_EVT_MODE_ONESHOT:
+		pr_info("sh_cmt: %s used for oneshot clock events\n",
+			ced->name);
+		sh_cmt_clock_event_start(p, 0);
+		break;
+	case CLOCK_EVT_MODE_SHUTDOWN:
+	case CLOCK_EVT_MODE_UNUSED:
+		sh_cmt_stop(p, FLAG_CLOCKEVENT);
+		break;
+	default:
+		break;
+	}
+}
+
+static int sh_cmt_clock_event_next(unsigned long delta,
+				   struct clock_event_device *ced)
+{
+	struct sh_cmt_priv *p = ced_to_sh_cmt(ced);
+
+	BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT);
+	if (likely(p->flags & FLAG_IRQCONTEXT))
+		p->next_match_value = delta;
+	else
+		sh_cmt_set_next(p, delta);
+
+	return 0;
+}
+
+static void sh_cmt_register_clockevent(struct sh_cmt_priv *p,
+				       char *name, unsigned long rating)
+{
+	struct clock_event_device *ced = &p->ced;
+
+	memset(ced, 0, sizeof(*ced));
+
+	ced->name = name;
+	ced->features = CLOCK_EVT_FEAT_PERIODIC;
+	ced->features |= CLOCK_EVT_FEAT_ONESHOT;
+	ced->rating = rating;
+	ced->cpumask = cpumask_of(0);
+	ced->set_next_event = sh_cmt_clock_event_next;
+	ced->set_mode = sh_cmt_clock_event_mode;
+
+	pr_info("sh_cmt: %s used for clock events\n", ced->name);
+	ced->mult = 1; /* work around misplaced WARN_ON() in clockevents.c */
+	clockevents_register_device(ced);
+}
+
+int sh_cmt_register(struct sh_cmt_priv *p, char *name,
+		    unsigned long clockevent_rating,
+		    unsigned long clocksource_rating)
+{
+	if (p->width == (sizeof(p->max_match_value) * 8))
+		p->max_match_value = ~0;
+	else
+		p->max_match_value = (1 << p->width) - 1;
+
+	p->match_value = p->max_match_value;
+	spin_lock_init(&p->lock);
+
+	if (clockevent_rating)
+		sh_cmt_register_clockevent(p, name, clockevent_rating);
+
+	return 0;
+}
+
+static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
+{
+	struct sh_cmt_config *cfg = pdev->dev.platform_data;
+	struct resource *res;
+	int irq, ret;
+	ret = -ENXIO;
+
+	memset(p, 0, sizeof(*p));
+	p->pdev = pdev;
+
+	if (!cfg) {
+		dev_err(&p->pdev->dev, "missing platform data\n");
+		goto err0;
+	}
+
+	platform_set_drvdata(pdev, p);
+
+	res = platform_get_resource(p->pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&p->pdev->dev, "failed to get I/O memory\n");
+		goto err0;
+	}
+
+	irq = platform_get_irq(p->pdev, 0);
+	if (irq < 0) {
+		dev_err(&p->pdev->dev, "failed to get irq\n");
+		goto err0;
+	}
+
+	/* map memory, let mapbase point to our channel */
+	p->mapbase = ioremap_nocache(res->start, resource_size(res));
+	if (p->mapbase == NULL) {
+		pr_err("sh_cmt: failed to remap I/O memory\n");
+		goto err0;
+	}
+
+	/* request irq using setup_irq() (too early for request_irq()) */
+	p->irqaction.name = cfg->name;
+	p->irqaction.handler = sh_cmt_interrupt;
+	p->irqaction.dev_id = p;
+	p->irqaction.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL;
+	p->irqaction.mask = CPU_MASK_NONE;
+	ret = setup_irq(irq, &p->irqaction);
+	if (ret) {
+		pr_err("sh_cmt: failed to request irq %d\n", irq);
+		goto err1;
+	}
+
+	/* get hold of clock */
+	p->clk = clk_get(&p->pdev->dev, cfg->clk);
+	if (IS_ERR(p->clk)) {
+		pr_err("sh_cmt: cannot get clock \"%s\"\n", cfg->clk);
+		ret = PTR_ERR(p->clk);
+		goto err2;
+	}
+
+	if (resource_size(res) == 6) {
+		p->width = 16;
+		p->overflow_bit = 0x80;
+		p->clear_bits = ~0xc0;
+	} else {
+		p->width = 32;
+		p->overflow_bit = 0x8000;
+		p->clear_bits = ~0xc000;
+	}
+
+	return sh_cmt_register(p, cfg->name,
+			       cfg->clockevent_rating,
+			       cfg->clocksource_rating);
+ err2:
+	free_irq(irq, p);
+ err1:
+	iounmap(p->mapbase);
+ err0:
+	return ret;
+}
+
+static int __devinit sh_cmt_probe(struct platform_device *pdev)
+{
+	struct sh_cmt_priv *p = platform_get_drvdata(pdev);
+	int ret;
+
+	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(&pdev->dev, "failed to allocate driver data\n");
+		return -ENOMEM;
+	}
+
+	ret = sh_cmt_setup(p, pdev);
+	if (ret) {
+		kfree(p);
+
+		platform_set_drvdata(pdev, NULL);
+	}
+	return ret;
+}
+
+static int __devexit sh_cmt_remove(struct platform_device *pdev)
+{
+	return -EBUSY; /* cannot unregister clockevent and clocksource */
+}
+
+static struct platform_driver sh_cmt_device_driver = {
+	.probe		= sh_cmt_probe,
+	.remove		= __devexit_p(sh_cmt_remove),
+	.driver		= {
+		.name	= "sh_cmt",
+	}
+};
+
+static int __init sh_cmt_init(void)
+{
+	return platform_driver_register(&sh_cmt_device_driver);
+}
+
+static void __exit sh_cmt_exit(void)
+{
+	platform_driver_unregister(&sh_cmt_device_driver);
+}
+
+module_init(sh_cmt_init);
+module_exit(sh_cmt_exit);
+
+MODULE_AUTHOR("Magnus Damm");
+MODULE_DESCRIPTION("SuperH CMT Timer Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/input/joystick/maplecontrol.c b/drivers/input/joystick/maplecontrol.c
index e50047bfe938..77cfde571bd9 100644
--- a/drivers/input/joystick/maplecontrol.c
+++ b/drivers/input/joystick/maplecontrol.c
@@ -3,7 +3,7 @@
  *	Based on drivers/usb/iforce.c
  *
  *	Copyright Yaegashi Takeshi, 2001
- *	Adrian McMenamin, 2008
+ *	Adrian McMenamin, 2008 - 2009
  */
 
 #include <linux/kernel.h>
@@ -29,7 +29,7 @@ static void dc_pad_callback(struct mapleq *mq)
 	struct maple_device *mapledev = mq->dev;
 	struct dc_pad *pad = maple_get_drvdata(mapledev);
 	struct input_dev *dev = pad->dev;
-	unsigned char *res = mq->recvbuf;
+	unsigned char *res = mq->recvbuf->buf;
 
 	buttons = ~le16_to_cpup((__le16 *)(res + 8));
 
diff --git a/drivers/input/keyboard/maple_keyb.c b/drivers/input/keyboard/maple_keyb.c
index 22f17a593be7..5aa2361aef95 100644
--- a/drivers/input/keyboard/maple_keyb.c
+++ b/drivers/input/keyboard/maple_keyb.c
@@ -1,8 +1,8 @@
 /*
  * SEGA Dreamcast keyboard driver
  * Based on drivers/usb/usbkbd.c
- * Copyright YAEGASHI Takeshi, 2001
- * Porting to 2.6 Copyright Adrian McMenamin, 2007, 2008
+ * Copyright (c) YAEGASHI Takeshi, 2001
+ * Porting to 2.6 Copyright (c) Adrian McMenamin, 2007 - 2009
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -33,7 +33,7 @@ static DEFINE_MUTEX(maple_keyb_mutex);
 
 #define NR_SCANCODES 256
 
-MODULE_AUTHOR("YAEGASHI Takeshi, Adrian McMenamin");
+MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk");
 MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver");
 MODULE_LICENSE("GPL");
 
@@ -115,7 +115,7 @@ static void dc_scan_kbd(struct dc_kbd *kbd)
 				input_event(dev, EV_MSC, MSC_SCAN, code);
 				input_report_key(dev, keycode, 0);
 			} else
-				printk(KERN_DEBUG "maple_keyb: "
+				dev_dbg(&dev->dev,
 					"Unknown key (scancode %#x) released.",
 					code);
 		}
@@ -127,7 +127,7 @@ static void dc_scan_kbd(struct dc_kbd *kbd)
 				input_event(dev, EV_MSC, MSC_SCAN, code);
 				input_report_key(dev, keycode, 1);
 			} else
-				printk(KERN_DEBUG "maple_keyb: "
+				dev_dbg(&dev->dev,
 					"Unknown key (scancode %#x) pressed.",
 					code);
 		}
@@ -140,7 +140,7 @@ static void dc_kbd_callback(struct mapleq *mq)
 {
 	struct maple_device *mapledev = mq->dev;
 	struct dc_kbd *kbd = maple_get_drvdata(mapledev);
-	unsigned long *buf = mq->recvbuf;
+	unsigned long *buf = (unsigned long *)(mq->recvbuf->buf);
 
 	/*
 	 * We should always get the lock because the only
@@ -159,22 +159,27 @@ static void dc_kbd_callback(struct mapleq *mq)
 
 static int probe_maple_kbd(struct device *dev)
 {
-	struct maple_device *mdev = to_maple_dev(dev);
-	struct maple_driver *mdrv = to_maple_driver(dev->driver);
+	struct maple_device *mdev;
+	struct maple_driver *mdrv;
 	int i, error;
 	struct dc_kbd *kbd;
 	struct input_dev *idev;
 
-	if (!(mdev->function & MAPLE_FUNC_KEYBOARD))
-		return -EINVAL;
+	mdev = to_maple_dev(dev);
+	mdrv = to_maple_driver(dev->driver);
 
 	kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL);
-	idev = input_allocate_device();
-	if (!kbd || !idev) {
+	if (!kbd) {
 		error = -ENOMEM;
 		goto fail;
 	}
 
+	idev = input_allocate_device();
+	if (!idev) {
+		error = -ENOMEM;
+		goto fail_idev_alloc;
+	}
+
 	kbd->dev = idev;
 	memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode));
 
@@ -195,7 +200,7 @@ static int probe_maple_kbd(struct device *dev)
 
 	error = input_register_device(idev);
 	if (error)
-		goto fail;
+		goto fail_register;
 
 	/* Maple polling is locked to VBLANK - which may be just 50/s */
 	maple_getcond_callback(mdev, dc_kbd_callback, HZ/50,
@@ -207,10 +212,12 @@ static int probe_maple_kbd(struct device *dev)
 
 	return error;
 
-fail:
+fail_register:
+	maple_set_drvdata(mdev, NULL);
 	input_free_device(idev);
+fail_idev_alloc:
 	kfree(kbd);
-	maple_set_drvdata(mdev, NULL);
+fail:
 	return error;
 }
 
diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c
index 5c8a1bcf7ca7..e1480fb11de3 100644
--- a/drivers/input/keyboard/sh_keysc.c
+++ b/drivers/input/keyboard/sh_keysc.c
@@ -219,6 +219,8 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
 		  pdata->scan_timing, priv->iomem_base + KYCR1_OFFS);
 	iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
 	iowrite16(KYCR2_IRQ_LEVEL, priv->iomem_base + KYCR2_OFFS);
+
+	device_init_wakeup(&pdev->dev, 1);
 	return 0;
  err5:
 	free_irq(irq, pdev);
@@ -253,17 +255,33 @@ static int __devexit sh_keysc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int sh_keysc_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
+	unsigned short value;
+
+	value = ioread16(priv->iomem_base + KYCR1_OFFS);
+
+	if (device_may_wakeup(dev))
+		value |= 0x80;
+	else
+		value &= ~0x80;
 
-#define sh_keysc_suspend NULL
-#define sh_keysc_resume NULL
+	iowrite16(value, priv->iomem_base + KYCR1_OFFS);
+	return 0;
+}
+
+static struct dev_pm_ops sh_keysc_dev_pm_ops = {
+	.suspend = sh_keysc_suspend,
+};
 
 struct platform_driver sh_keysc_device_driver = {
 	.probe		= sh_keysc_probe,
 	.remove		= __devexit_p(sh_keysc_remove),
-	.suspend	= sh_keysc_suspend,
-	.resume		= sh_keysc_resume,
 	.driver		= {
 		.name	= "sh_keysc",
+		.pm	= &sh_keysc_dev_pm_ops,
 	}
 };
 
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 043d50fb6ef6..729f899a5cd5 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 6d9ba35caf11..26b28a7a90b5 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/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c
new file mode 100644
index 000000000000..1f73297e7776
--- /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/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 1c3fc6b428e9..4898f7fe8518 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -28,7 +28,7 @@
 #include <asm/rtc.h>
 
 #define DRV_NAME	"sh-rtc"
-#define DRV_VERSION	"0.2.0"
+#define DRV_VERSION	"0.2.1"
 
 #define RTC_REG(r)	((r) * rtc_reg_size)
 
@@ -99,56 +99,51 @@ struct sh_rtc {
 	unsigned short periodic_freq;
 };
 
-static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
+static int __sh_rtc_interrupt(struct sh_rtc *rtc)
 {
-	struct sh_rtc *rtc = dev_id;
-	unsigned int tmp;
-
-	spin_lock(&rtc->lock);
+	unsigned int tmp, pending;
 
 	tmp = readb(rtc->regbase + RCR1);
+	pending = tmp & RCR1_CF;
 	tmp &= ~RCR1_CF;
 	writeb(tmp, rtc->regbase + RCR1);
 
 	/* Users have requested One x Second IRQ */
-	if (rtc->periodic_freq & PF_OXS)
+	if (pending && rtc->periodic_freq & PF_OXS)
 		rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF);
 
-	spin_unlock(&rtc->lock);
-
-	return IRQ_HANDLED;
+	return pending;
 }
 
-static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
+static int __sh_rtc_alarm(struct sh_rtc *rtc)
 {
-	struct sh_rtc *rtc = dev_id;
-	unsigned int tmp;
-
-	spin_lock(&rtc->lock);
+	unsigned int tmp, pending;
 
 	tmp = readb(rtc->regbase + RCR1);
+	pending = tmp & RCR1_AF;
 	tmp &= ~(RCR1_AF | RCR1_AIE);
-		writeb(tmp, rtc->regbase + RCR1);
-
-	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
+	writeb(tmp, rtc->regbase + RCR1);
 
-	spin_unlock(&rtc->lock);
+	if (pending)
+		rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
 
-	return IRQ_HANDLED;
+	return pending;
 }
 
-static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
+static int __sh_rtc_periodic(struct sh_rtc *rtc)
 {
-	struct sh_rtc *rtc = dev_id;
 	struct rtc_device *rtc_dev = rtc->rtc_dev;
-	unsigned int tmp;
-
-	spin_lock(&rtc->lock);
+	struct rtc_task *irq_task;
+	unsigned int tmp, pending;
 
 	tmp = readb(rtc->regbase + RCR2);
+	pending = tmp & RCR2_PEF;
 	tmp &= ~RCR2_PEF;
 	writeb(tmp, rtc->regbase + RCR2);
 
+	if (!pending)
+		return 0;
+
 	/* Half period enabled than one skipped and the next notified */
 	if ((rtc->periodic_freq & PF_HP) && (rtc->periodic_freq & PF_COUNT))
 		rtc->periodic_freq &= ~PF_COUNT;
@@ -157,16 +152,65 @@ static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
 			rtc->periodic_freq |= PF_COUNT;
 		if (rtc->periodic_freq & PF_KOU) {
 			spin_lock(&rtc_dev->irq_task_lock);
-			if (rtc_dev->irq_task)
-				rtc_dev->irq_task->func(rtc_dev->irq_task->private_data);
+			irq_task = rtc_dev->irq_task;
+			if (irq_task)
+				irq_task->func(irq_task->private_data);
 			spin_unlock(&rtc_dev->irq_task_lock);
 		} else
 			rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
 	}
 
+	return pending;
+}
+
+static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
+{
+	struct sh_rtc *rtc = dev_id;
+	int ret;
+
+	spin_lock(&rtc->lock);
+	ret = __sh_rtc_interrupt(rtc);
+	spin_unlock(&rtc->lock);
+
+	return IRQ_RETVAL(ret);
+}
+
+static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
+{
+	struct sh_rtc *rtc = dev_id;
+	int ret;
+
+	spin_lock(&rtc->lock);
+	ret = __sh_rtc_alarm(rtc);
+	spin_unlock(&rtc->lock);
+
+	return IRQ_RETVAL(ret);
+}
+
+static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
+{
+	struct sh_rtc *rtc = dev_id;
+	int ret;
+
+	spin_lock(&rtc->lock);
+	ret = __sh_rtc_periodic(rtc);
 	spin_unlock(&rtc->lock);
 
-	return IRQ_HANDLED;
+	return IRQ_RETVAL(ret);
+}
+
+static irqreturn_t sh_rtc_shared(int irq, void *dev_id)
+{
+	struct sh_rtc *rtc = dev_id;
+	int ret;
+
+	spin_lock(&rtc->lock);
+	ret = __sh_rtc_interrupt(rtc);
+	ret |= __sh_rtc_alarm(rtc);
+	ret |= __sh_rtc_periodic(rtc);
+	spin_unlock(&rtc->lock);
+
+	return IRQ_RETVAL(ret);
 }
 
 static inline void sh_rtc_setpie(struct device *dev, unsigned int enable)
@@ -275,6 +319,25 @@ static int sh_rtc_proc(struct device *dev, struct seq_file *seq)
 	return 0;
 }
 
+static inline void sh_rtc_setcie(struct device *dev, unsigned int enable)
+{
+	struct sh_rtc *rtc = dev_get_drvdata(dev);
+	unsigned int tmp;
+
+	spin_lock_irq(&rtc->lock);
+
+	tmp = readb(rtc->regbase + RCR1);
+
+	if (!enable)
+		tmp &= ~RCR1_CIE;
+	else
+		tmp |= RCR1_CIE;
+
+	writeb(tmp, rtc->regbase + RCR1);
+
+	spin_unlock_irq(&rtc->lock);
+}
+
 static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
 {
 	struct sh_rtc *rtc = dev_get_drvdata(dev);
@@ -291,9 +354,11 @@ static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
 		break;
 	case RTC_UIE_OFF:
 		rtc->periodic_freq &= ~PF_OXS;
+		sh_rtc_setcie(dev, 0);
 		break;
 	case RTC_UIE_ON:
 		rtc->periodic_freq |= PF_OXS;
+		sh_rtc_setcie(dev, 1);
 		break;
 	case RTC_IRQP_READ:
 		ret = put_user(rtc->rtc_dev->irq_freq,
@@ -356,18 +421,17 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm)
 		tm->tm_sec--;
 #endif
 
+	/* only keep the carry interrupt enabled if UIE is on */
+	if (!(rtc->periodic_freq & PF_OXS))
+		sh_rtc_setcie(dev, 0);
+
 	dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
 		"mday=%d, mon=%d, year=%d, wday=%d\n",
 		__func__,
 		tm->tm_sec, tm->tm_min, tm->tm_hour,
 		tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);
 
-	if (rtc_valid_tm(tm) < 0) {
-		dev_err(dev, "invalid date\n");
-		rtc_time_to_tm(0, tm);
-	}
-
-	return 0;
+	return rtc_valid_tm(tm);
 }
 
 static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm)
@@ -572,7 +636,7 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev)
 {
 	struct sh_rtc *rtc;
 	struct resource *res;
-	unsigned int tmp;
+	struct rtc_time r;
 	int ret;
 
 	rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL);
@@ -585,26 +649,12 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev)
 	ret = platform_get_irq(pdev, 0);
 	if (unlikely(ret <= 0)) {
 		ret = -ENOENT;
-		dev_err(&pdev->dev, "No IRQ for period\n");
+		dev_err(&pdev->dev, "No IRQ resource\n");
 		goto err_badres;
 	}
 	rtc->periodic_irq = ret;
-
-	ret = platform_get_irq(pdev, 1);
-	if (unlikely(ret <= 0)) {
-		ret = -ENOENT;
-		dev_err(&pdev->dev, "No IRQ for carry\n");
-		goto err_badres;
-	}
-	rtc->carry_irq = ret;
-
-	ret = platform_get_irq(pdev, 2);
-	if (unlikely(ret <= 0)) {
-		ret = -ENOENT;
-		dev_err(&pdev->dev, "No IRQ for alarm\n");
-		goto err_badres;
-	}
-	rtc->alarm_irq = ret;
+	rtc->carry_irq = platform_get_irq(pdev, 1);
+	rtc->alarm_irq = platform_get_irq(pdev, 2);
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 	if (unlikely(res == NULL)) {
@@ -646,47 +696,66 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev)
 	}
 
 	rtc->rtc_dev->max_user_freq = 256;
-	rtc->rtc_dev->irq_freq = 1;
-	rtc->periodic_freq = 0x60;
 
 	platform_set_drvdata(pdev, rtc);
 
-	/* register periodic/carry/alarm irqs */
-	ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, IRQF_DISABLED,
-			  "sh-rtc period", rtc);
-	if (unlikely(ret)) {
-		dev_err(&pdev->dev,
-			"request period IRQ failed with %d, IRQ %d\n", ret,
-			rtc->periodic_irq);
-		goto err_unmap;
-	}
+	if (rtc->carry_irq <= 0) {
+		/* register shared periodic/carry/alarm irq */
+		ret = request_irq(rtc->periodic_irq, sh_rtc_shared,
+				  IRQF_DISABLED, "sh-rtc", rtc);
+		if (unlikely(ret)) {
+			dev_err(&pdev->dev,
+				"request IRQ failed with %d, IRQ %d\n", ret,
+				rtc->periodic_irq);
+			goto err_unmap;
+		}
+	} else {
+		/* register periodic/carry/alarm irqs */
+		ret = request_irq(rtc->periodic_irq, sh_rtc_periodic,
+				  IRQF_DISABLED, "sh-rtc period", rtc);
+		if (unlikely(ret)) {
+			dev_err(&pdev->dev,
+				"request period IRQ failed with %d, IRQ %d\n",
+				ret, rtc->periodic_irq);
+			goto err_unmap;
+		}
 
-	ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, IRQF_DISABLED,
-			  "sh-rtc carry", rtc);
-	if (unlikely(ret)) {
-		dev_err(&pdev->dev,
-			"request carry IRQ failed with %d, IRQ %d\n", ret,
-			rtc->carry_irq);
-		free_irq(rtc->periodic_irq, rtc);
-		goto err_unmap;
-	}
+		ret = request_irq(rtc->carry_irq, sh_rtc_interrupt,
+				  IRQF_DISABLED, "sh-rtc carry", rtc);
+		if (unlikely(ret)) {
+			dev_err(&pdev->dev,
+				"request carry IRQ failed with %d, IRQ %d\n",
+				ret, rtc->carry_irq);
+			free_irq(rtc->periodic_irq, rtc);
+			goto err_unmap;
+		}
 
-	ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED,
-			  "sh-rtc alarm", rtc);
-	if (unlikely(ret)) {
-		dev_err(&pdev->dev,
-			"request alarm IRQ failed with %d, IRQ %d\n", ret,
-			rtc->alarm_irq);
-		free_irq(rtc->carry_irq, rtc);
-		free_irq(rtc->periodic_irq, rtc);
-		goto err_unmap;
+		ret = request_irq(rtc->alarm_irq, sh_rtc_alarm,
+				  IRQF_DISABLED, "sh-rtc alarm", rtc);
+		if (unlikely(ret)) {
+			dev_err(&pdev->dev,
+				"request alarm IRQ failed with %d, IRQ %d\n",
+				ret, rtc->alarm_irq);
+			free_irq(rtc->carry_irq, rtc);
+			free_irq(rtc->periodic_irq, rtc);
+			goto err_unmap;
+		}
 	}
 
-	tmp = readb(rtc->regbase + RCR1);
-	tmp &= ~RCR1_CF;
-	tmp |= RCR1_CIE;
-	writeb(tmp, rtc->regbase + RCR1);
+	/* everything disabled by default */
+	rtc->periodic_freq = 0;
+	rtc->rtc_dev->irq_freq = 0;
+	sh_rtc_setpie(&pdev->dev, 0);
+	sh_rtc_setaie(&pdev->dev, 0);
+	sh_rtc_setcie(&pdev->dev, 0);
+
+	/* reset rtc to epoch 0 if time is invalid */
+	if (rtc_read_time(rtc->rtc_dev, &r) < 0) {
+		rtc_time_to_tm(0, &r);
+		rtc_set_time(rtc->rtc_dev, &r);
+	}
 
+	device_init_wakeup(&pdev->dev, 1);
 	return 0;
 
 err_unmap:
@@ -708,10 +777,13 @@ static int __devexit sh_rtc_remove(struct platform_device *pdev)
 
 	sh_rtc_setpie(&pdev->dev, 0);
 	sh_rtc_setaie(&pdev->dev, 0);
+	sh_rtc_setcie(&pdev->dev, 0);
 
-	free_irq(rtc->carry_irq, rtc);
 	free_irq(rtc->periodic_irq, rtc);
-	free_irq(rtc->alarm_irq, rtc);
+	if (rtc->carry_irq > 0) {
+		free_irq(rtc->carry_irq, rtc);
+		free_irq(rtc->alarm_irq, rtc);
+	}
 
 	release_resource(rtc->res);
 
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 557b54ab2f25..dbf5357a77b3 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -139,7 +139,7 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c)
 	} while (!(status & SCxSR_TDxE(port)));
 
 	sci_in(port, SCxSR);            /* Dummy read */
-	sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
+	sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
 	sci_out(port, SCxTDR, c);
 }
 #endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */
@@ -263,6 +263,7 @@ static inline void sci_init_pins(struct uart_port *port, unsigned int cflag)
 #elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
       defined(CONFIG_CPU_SUBTYPE_SH7780) || \
       defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+      defined(CONFIG_CPU_SUBTYPE_SH7786) || \
       defined(CONFIG_CPU_SUBTYPE_SHX3)
 static inline void sci_init_pins(struct uart_port *port, unsigned int cflag)
 {
@@ -284,7 +285,8 @@ static inline void sci_init_pins(struct uart_port *port, unsigned int cflag)
 
 #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \
     defined(CONFIG_CPU_SUBTYPE_SH7780) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7785)
+    defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7786)
 static inline int scif_txroom(struct uart_port *port)
 {
 	return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff);
@@ -1095,6 +1097,7 @@ static void serial_console_write(struct console *co, const char *s,
 				 unsigned count)
 {
 	struct uart_port *port = &serial_console_port->port;
+	unsigned short bits;
 	int i;
 
 	for (i = 0; i < count; i++) {
@@ -1103,6 +1106,11 @@ static void serial_console_write(struct console *co, const char *s,
 
 		sci_poll_put_char(port, *s++);
 	}
+
+	/* wait until fifo is empty and last bit has been transmitted */
+	bits = SCxSR_TDxE(port) | SCxSR_TEND(port);
+	while ((sci_in(port, SCxSR) & bits) != bits)
+		cpu_relax();
 }
 
 static int __init serial_console_setup(struct console *co, char *options)
diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h
index 022e89ffec1d..d0aa82d7fce0 100644
--- a/drivers/serial/sh-sci.h
+++ b/drivers/serial/sh-sci.h
@@ -1,6 +1,6 @@
 #include <linux/serial_core.h>
 #include <asm/io.h>
-#include <asm/gpio.h>
+#include <linux/gpio.h>
 
 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
 #include <asm/regs306x.h>
@@ -126,7 +126,8 @@
 # define SCSPTR1	0xffe10024	/* 16 bit SCIF */
 # define SCIF_ORER	0x0001		/* Overrun error bit */
 # define SCSCR_INIT(port)	0x3a	/* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
-#elif defined(CONFIG_CPU_SUBTYPE_SH7785)
+#elif defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+      defined(CONFIG_CPU_SUBTYPE_SH7786)
 # define SCSPTR0	0xffea0024	/* 16 bit SCIF */
 # define SCSPTR1	0xffeb0024	/* 16 bit SCIF */
 # define SCSPTR2	0xffec0024	/* 16 bit SCIF */
@@ -182,6 +183,7 @@
     defined(CONFIG_CPU_SUBTYPE_SH7763)  || \
     defined(CONFIG_CPU_SUBTYPE_SH7780)  || \
     defined(CONFIG_CPU_SUBTYPE_SH7785)  || \
+    defined(CONFIG_CPU_SUBTYPE_SH7786)  || \
     defined(CONFIG_CPU_SUBTYPE_SHX3)
 #define SCI_CTRL_FLAGS_REIE 0x08 /* 7750 SCIF */
 #else
@@ -413,7 +415,8 @@ SCIx_FNS(SCxRDR, 0x0a,  8, 0x14,  8, 0x0A,  8, 0x14,  8, 0x05,  8)
 SCIF_FNS(SCFCR,                      0x0c,  8, 0x18, 16)
 #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \
     defined(CONFIG_CPU_SUBTYPE_SH7780) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7785)
+    defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7786)
 SCIF_FNS(SCFDR,			     0x0e, 16, 0x1C, 16)
 SCIF_FNS(SCTFDR,		     0x0e, 16, 0x1C, 16)
 SCIF_FNS(SCRFDR,		     0x0e, 16, 0x20, 16)
@@ -644,7 +647,8 @@ static inline int sci_rxd_in(struct uart_port *port)
 		return ctrl_inw(SCSPTR1) & 0x0001 ? 1 : 0; /* SCIF */
 	return 1;
 }
-#elif defined(CONFIG_CPU_SUBTYPE_SH7785)
+#elif defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+      defined(CONFIG_CPU_SUBTYPE_SH7786)
 static inline int sci_rxd_in(struct uart_port *port)
 {
 	if (port->mapbase == 0xffea0000)
@@ -746,7 +750,8 @@ static inline int sci_rxd_in(struct uart_port *port)
  */
 
 #if defined(CONFIG_CPU_SUBTYPE_SH7780) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7785)
+    defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7786)
 #define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(16*bps)-1)
 #elif defined(CONFIG_CPU_SUBTYPE_SH7705) || \
       defined(CONFIG_CPU_SUBTYPE_SH7720) || \
diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index 58d24c5a76ce..2269fbcaa182 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -568,6 +568,10 @@ static void __init intc_register_irq(struct intc_desc *desc,
 	if (!data[0] && data[1])
 		primary = 1;
 
+	if (!data[0] && !data[1])
+		pr_warning("intc: missing unique irq mask for "
+			   "irq %d (vect 0x%04x)\n", irq, irq2evt(irq));
+
 	data[0] = data[0] ? data[0] : intc_mask_data(desc, d, enum_id, 1);
 	data[1] = data[1] ? data[1] : intc_prio_data(desc, d, enum_id, 1);
 
@@ -641,6 +645,17 @@ static unsigned int __init save_reg(struct intc_desc_int *d,
 	return 0;
 }
 
+static unsigned char *intc_evt2irq_table;
+
+unsigned int intc_evt2irq(unsigned int vector)
+{
+	unsigned int irq = evt2irq(vector);
+
+	if (intc_evt2irq_table && intc_evt2irq_table[irq])
+		irq = intc_evt2irq_table[irq];
+
+	return irq;
+}
 
 void __init register_intc_controller(struct intc_desc *desc)
 {
@@ -705,9 +720,41 @@ void __init register_intc_controller(struct intc_desc *desc)
 
 	BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
 
+	/* keep the first vector only if same enum is used multiple times */
+	for (i = 0; i < desc->nr_vectors; i++) {
+		struct intc_vect *vect = desc->vectors + i;
+		int first_irq = evt2irq(vect->vect);
+
+		if (!vect->enum_id)
+			continue;
+
+		for (k = i + 1; k < desc->nr_vectors; k++) {
+			struct intc_vect *vect2 = desc->vectors + k;
+
+			if (vect->enum_id != vect2->enum_id)
+				continue;
+
+			vect2->enum_id = 0;
+
+			if (!intc_evt2irq_table)
+				intc_evt2irq_table = alloc_bootmem(NR_IRQS);
+
+			if (!intc_evt2irq_table) {
+				pr_warning("intc: cannot allocate evt2irq!\n");
+				continue;
+			}
+
+			intc_evt2irq_table[evt2irq(vect2->vect)] = first_irq;
+		}
+	}
+
+	/* register the vectors one by one */
 	for (i = 0; i < desc->nr_vectors; i++) {
 		struct intc_vect *vect = desc->vectors + i;
 
+		if (!vect->enum_id)
+			continue;
+
 		intc_register_irq(desc, d, vect->enum_id, evt2irq(vect->vect));
 	}
 }
diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c
index 63f0de29aa14..c71bb4b4ce84 100644
--- a/drivers/sh/maple/maple.c
+++ b/drivers/sh/maple/maple.c
@@ -1,16 +1,10 @@
 /*
  * Core maple bus functionality
  *
- *  Copyright (C) 2007, 2008 Adrian McMenamin
+ *  Copyright (C) 2007 - 2009 Adrian McMenamin
  *  Copyright (C) 2001 - 2008 Paul Mundt
- *
- * Based on 2.4 code by:
- *
- *  Copyright (C) 2000-2001 YAEGASHI Takeshi
+ *  Copyright (C) 2000 - 2001 YAEGASHI Takeshi
  *  Copyright (C) 2001 M. R. Brown
- *  Copyright (C) 2001 Paul Mundt
- *
- * and others.
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -32,7 +26,7 @@
 #include <mach/dma.h>
 #include <mach/sysasic.h>
 
-MODULE_AUTHOR("Yaegashi Takeshi, Paul Mundt, M. R. Brown, Adrian McMenamin");
+MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
 MODULE_DESCRIPTION("Maple bus driver for Dreamcast");
 MODULE_LICENSE("GPL v2");
 MODULE_SUPPORTED_DEVICE("{{SEGA, Dreamcast/Maple}}");
@@ -49,7 +43,7 @@ static LIST_HEAD(maple_sentq);
 /* mutex to protect queue of waiting packets */
 static DEFINE_MUTEX(maple_wlist_lock);
 
-static struct maple_driver maple_dummy_driver;
+static struct maple_driver maple_unsupported_device;
 static struct device maple_bus;
 static int subdevice_map[MAPLE_PORTS];
 static unsigned long *maple_sendbuf, *maple_sendptr, *maple_lastptr;
@@ -62,8 +56,9 @@ struct maple_device_specify {
 	int unit;
 };
 
-static bool checked[4];
-static struct maple_device *baseunits[4];
+static bool checked[MAPLE_PORTS];
+static bool empty[MAPLE_PORTS];
+static struct maple_device *baseunits[MAPLE_PORTS];
 
 /**
  * maple_driver_register - register a maple driver
@@ -97,12 +92,20 @@ void maple_driver_unregister(struct maple_driver *drv)
 EXPORT_SYMBOL_GPL(maple_driver_unregister);
 
 /* set hardware registers to enable next round of dma */
-static void maplebus_dma_reset(void)
+static void maple_dma_reset(void)
 {
 	ctrl_outl(MAPLE_MAGIC, MAPLE_RESET);
 	/* set trig type to 0 for software trigger, 1 for hardware (VBLANK) */
 	ctrl_outl(1, MAPLE_TRIGTYPE);
-	ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(50000), MAPLE_SPEED);
+	/*
+	* Maple system register
+	* bits 31 - 16	timeout in units of 20nsec
+	* bit 12	hard trigger - set 0 to keep responding to VBLANK
+	* bits 9 - 8	set 00 for 2 Mbps, 01 for 1 Mbps
+	* bits 3 - 0	delay (in 1.3ms) between VBLANK and start of DMA
+	* max delay is 11
+	*/
+	ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(0xFFFF), MAPLE_SPEED);
 	ctrl_outl(PHYSADDR(maple_sendbuf), MAPLE_DMAADDR);
 	ctrl_outl(1, MAPLE_ENABLE);
 }
@@ -134,21 +137,16 @@ static void maple_release_device(struct device *dev)
 {
 	struct maple_device *mdev;
 	struct mapleq *mq;
-	if (!dev)
-		return;
+
 	mdev = to_maple_dev(dev);
 	mq = mdev->mq;
-	if (mq) {
-		if (mq->recvbufdcsp)
-			kmem_cache_free(maple_queue_cache, mq->recvbufdcsp);
-		kfree(mq);
-		mq = NULL;
-	}
+	kmem_cache_free(maple_queue_cache, mq->recvbuf);
+	kfree(mq);
 	kfree(mdev);
 }
 
 /**
- * maple_add_packet - add a single instruction to the queue
+ * maple_add_packet - add a single instruction to the maple bus queue
  * @mdev: maple device
  * @function: function on device being queried
  * @command: maple command to add
@@ -158,68 +156,12 @@ static void maple_release_device(struct device *dev)
 int maple_add_packet(struct maple_device *mdev, u32 function, u32 command,
 	size_t length, void *data)
 {
-	int locking, ret = 0;
-	void *sendbuf = NULL;
-
-	mutex_lock(&maple_wlist_lock);
-	/* bounce if device already locked */
-	locking = mutex_is_locked(&mdev->mq->mutex);
-	if (locking) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	mutex_lock(&mdev->mq->mutex);
-
-	if (length) {
-		sendbuf = kmalloc(length * 4, GFP_KERNEL);
-		if (!sendbuf) {
-			mutex_unlock(&mdev->mq->mutex);
-			ret = -ENOMEM;
-			goto out;
-		}
-		((__be32 *)sendbuf)[0] = cpu_to_be32(function);
-	}
-
-	mdev->mq->command = command;
-	mdev->mq->length = length;
-	if (length > 1)
-		memcpy(sendbuf + 4, data, (length - 1) * 4);
-	mdev->mq->sendbuf = sendbuf;
-
-	list_add(&mdev->mq->list, &maple_waitq);
-out:
-	mutex_unlock(&maple_wlist_lock);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(maple_add_packet);
-
-/**
- * maple_add_packet_sleeps - add a single instruction to the queue
- * @mdev: maple device
- * @function: function on device being queried
- * @command: maple command to add
- * @length: length of command string (in 32 bit words)
- * @data: remainder of command string
- *
- * Same as maple_add_packet(), but waits for the lock to become free.
- */
-int maple_add_packet_sleeps(struct maple_device *mdev, u32 function,
-	u32 command, size_t length, void *data)
-{
-	int locking, ret = 0;
+	int ret = 0;
 	void *sendbuf = NULL;
 
-	locking = mutex_lock_interruptible(&mdev->mq->mutex);
-	if (locking) {
-		ret = -EIO;
-		goto out;
-	}
-
 	if (length) {
-		sendbuf = kmalloc(length * 4, GFP_KERNEL);
+		sendbuf = kzalloc(length * 4, GFP_KERNEL);
 		if (!sendbuf) {
-			mutex_unlock(&mdev->mq->mutex);
 			ret = -ENOMEM;
 			goto out;
 		}
@@ -233,38 +175,35 @@ int maple_add_packet_sleeps(struct maple_device *mdev, u32 function,
 	mdev->mq->sendbuf = sendbuf;
 
 	mutex_lock(&maple_wlist_lock);
-	list_add(&mdev->mq->list, &maple_waitq);
+	list_add_tail(&mdev->mq->list, &maple_waitq);
 	mutex_unlock(&maple_wlist_lock);
 out:
 	return ret;
 }
-EXPORT_SYMBOL_GPL(maple_add_packet_sleeps);
+EXPORT_SYMBOL_GPL(maple_add_packet);
 
 static struct mapleq *maple_allocq(struct maple_device *mdev)
 {
 	struct mapleq *mq;
 
-	mq = kmalloc(sizeof(*mq), GFP_KERNEL);
+	mq = kzalloc(sizeof(*mq), GFP_KERNEL);
 	if (!mq)
 		goto failed_nomem;
 
+	INIT_LIST_HEAD(&mq->list);
 	mq->dev = mdev;
-	mq->recvbufdcsp = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL);
-	mq->recvbuf = (void *) P2SEGADDR(mq->recvbufdcsp);
+	mq->recvbuf = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL);
 	if (!mq->recvbuf)
 		goto failed_p2;
-	/*
-	 * most devices do not need the mutex - but
-	 * anything that injects block reads or writes
-	 * will rely on it
-	 */
-	mutex_init(&mq->mutex);
+	mq->recvbuf->buf = &((mq->recvbuf->bufx)[0]);
 
 	return mq;
 
 failed_p2:
 	kfree(mq);
 failed_nomem:
+	dev_err(&mdev->dev, "could not allocate memory for device (%d, %d)\n",
+		mdev->port, mdev->unit);
 	return NULL;
 }
 
@@ -272,12 +211,16 @@ static struct maple_device *maple_alloc_dev(int port, int unit)
 {
 	struct maple_device *mdev;
 
+	/* zero this out to avoid kobj subsystem
+	* thinking it has already been registered */
+
 	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 	if (!mdev)
 		return NULL;
 
 	mdev->port = port;
 	mdev->unit = unit;
+
 	mdev->mq = maple_allocq(mdev);
 
 	if (!mdev->mq) {
@@ -286,19 +229,14 @@ static struct maple_device *maple_alloc_dev(int port, int unit)
 	}
 	mdev->dev.bus = &maple_bus_type;
 	mdev->dev.parent = &maple_bus;
+	init_waitqueue_head(&mdev->maple_wait);
 	return mdev;
 }
 
 static void maple_free_dev(struct maple_device *mdev)
 {
-	if (!mdev)
-		return;
-	if (mdev->mq) {
-		if (mdev->mq->recvbufdcsp)
-			kmem_cache_free(maple_queue_cache,
-				mdev->mq->recvbufdcsp);
-		kfree(mdev->mq);
-	}
+	kmem_cache_free(maple_queue_cache, mdev->mq->recvbuf);
+	kfree(mdev->mq);
 	kfree(mdev);
 }
 
@@ -320,7 +258,7 @@ static void maple_build_block(struct mapleq *mq)
 	maple_lastptr = maple_sendptr;
 
 	*maple_sendptr++ = (port << 16) | len | 0x80000000;
-	*maple_sendptr++ = PHYSADDR(mq->recvbuf);
+	*maple_sendptr++ = PHYSADDR(mq->recvbuf->buf);
 	*maple_sendptr++ =
 	    mq->command | (to << 8) | (from << 16) | (len << 24);
 	while (len-- > 0)
@@ -333,20 +271,28 @@ static void maple_send(void)
 	int i, maple_packets = 0;
 	struct mapleq *mq, *nmq;
 
-	if (!list_empty(&maple_sentq))
+	if (!maple_dma_done())
 		return;
+
+	/* disable DMA */
+	ctrl_outl(0, MAPLE_ENABLE);
+
+	if (!list_empty(&maple_sentq))
+		goto finish;
+
 	mutex_lock(&maple_wlist_lock);
-	if (list_empty(&maple_waitq) || !maple_dma_done()) {
+	if (list_empty(&maple_waitq)) {
 		mutex_unlock(&maple_wlist_lock);
-		return;
+		goto finish;
 	}
-	mutex_unlock(&maple_wlist_lock);
+
 	maple_lastptr = maple_sendbuf;
 	maple_sendptr = maple_sendbuf;
-	mutex_lock(&maple_wlist_lock);
+
 	list_for_each_entry_safe(mq, nmq, &maple_waitq, list) {
 		maple_build_block(mq);
-		list_move(&mq->list, &maple_sentq);
+		list_del_init(&mq->list);
+		list_add_tail(&mq->list, &maple_sentq);
 		if (maple_packets++ > MAPLE_MAXPACKETS)
 			break;
 	}
@@ -356,10 +302,13 @@ static void maple_send(void)
 			dma_cache_sync(0, maple_sendbuf + i * PAGE_SIZE,
 				       PAGE_SIZE, DMA_BIDIRECTIONAL);
 	}
+
+finish:
+	maple_dma_reset();
 }
 
 /* check if there is a driver registered likely to match this device */
-static int check_matching_maple_driver(struct device_driver *driver,
+static int maple_check_matching_driver(struct device_driver *driver,
 					void *devptr)
 {
 	struct maple_driver *maple_drv;
@@ -374,10 +323,7 @@ static int check_matching_maple_driver(struct device_driver *driver,
 
 static void maple_detach_driver(struct maple_device *mdev)
 {
-	if (!mdev)
-		return;
 	device_unregister(&mdev->dev);
-	mdev = NULL;
 }
 
 /* process initial MAPLE_COMMAND_DEVINFO for each device or port */
@@ -385,9 +331,9 @@ static void maple_attach_driver(struct maple_device *mdev)
 {
 	char *p, *recvbuf;
 	unsigned long function;
-	int matched, retval;
+	int matched, error;
 
-	recvbuf = mdev->mq->recvbuf;
+	recvbuf = mdev->mq->recvbuf->buf;
 	/* copy the data as individual elements in
 	* case of memory optimisation */
 	memcpy(&mdev->devinfo.function, recvbuf + 4, 4);
@@ -395,7 +341,6 @@ static void maple_attach_driver(struct maple_device *mdev)
 	memcpy(&mdev->devinfo.area_code, recvbuf + 20, 1);
 	memcpy(&mdev->devinfo.connector_direction, recvbuf + 21, 1);
 	memcpy(&mdev->devinfo.product_name[0], recvbuf + 22, 30);
-	memcpy(&mdev->devinfo.product_licence[0], recvbuf + 52, 60);
 	memcpy(&mdev->devinfo.standby_power, recvbuf + 112, 2);
 	memcpy(&mdev->devinfo.max_power, recvbuf + 114, 2);
 	memcpy(mdev->product_name, mdev->devinfo.product_name, 30);
@@ -414,43 +359,40 @@ static void maple_attach_driver(struct maple_device *mdev)
 		else
 			break;
 
-	printk(KERN_INFO "Maple device detected: %s\n",
-		mdev->product_name);
-	printk(KERN_INFO "Maple device: %s\n", mdev->product_licence);
-
 	function = be32_to_cpu(mdev->devinfo.function);
 
+	dev_info(&mdev->dev, "detected %s: function 0x%lX: at (%d, %d)\n",
+		mdev->product_name, function, mdev->port, mdev->unit);
+
 	if (function > 0x200) {
 		/* Do this silently - as not a real device */
 		function = 0;
-		mdev->driver = &maple_dummy_driver;
-		sprintf(mdev->dev.bus_id, "%d:0.port", mdev->port);
+		mdev->driver = &maple_unsupported_device;
+		dev_set_name(&mdev->dev, "%d:0.port", mdev->port);
 	} else {
-		printk(KERN_INFO
-			"Maple bus at (%d, %d): Function 0x%lX\n",
-			mdev->port, mdev->unit, function);
-
 		matched =
 			bus_for_each_drv(&maple_bus_type, NULL, mdev,
-				check_matching_maple_driver);
+				maple_check_matching_driver);
 
 		if (matched == 0) {
 			/* Driver does not exist yet */
-			printk(KERN_INFO
-				"No maple driver found.\n");
-			mdev->driver = &maple_dummy_driver;
+			dev_info(&mdev->dev, "no driver found\n");
+			mdev->driver = &maple_unsupported_device;
 		}
-		sprintf(mdev->dev.bus_id, "%d:0%d.%lX", mdev->port,
-			mdev->unit, function);
+
+		dev_set_name(&mdev->dev, "%d:0%d.%lX", mdev->port,
+			     mdev->unit, function);
 	}
+
 	mdev->function = function;
 	mdev->dev.release = &maple_release_device;
-	retval = device_register(&mdev->dev);
-	if (retval) {
-		printk(KERN_INFO
-		"Maple bus: Attempt to register device"
-		" (%x, %x) failed.\n",
-		mdev->port, mdev->unit);
+
+	atomic_set(&mdev->busy, 0);
+	error = device_register(&mdev->dev);
+	if (error) {
+		dev_warn(&mdev->dev, "could not register device at"
+			" (%d, %d), with error 0x%X\n", mdev->unit,
+			mdev->port, error);
 		maple_free_dev(mdev);
 		mdev = NULL;
 		return;
@@ -462,7 +404,7 @@ static void maple_attach_driver(struct maple_device *mdev)
  * port and unit then return 1 - allows identification
  * of which devices need to be attached or detached
  */
-static int detach_maple_device(struct device *device, void *portptr)
+static int check_maple_device(struct device *device, void *portptr)
 {
 	struct maple_device_specify *ds;
 	struct maple_device *mdev;
@@ -477,21 +419,25 @@ static int detach_maple_device(struct device *device, void *portptr)
 static int setup_maple_commands(struct device *device, void *ignored)
 {
 	int add;
-	struct maple_device *maple_dev = to_maple_dev(device);
-
-	if ((maple_dev->interval > 0)
-	    && time_after(jiffies, maple_dev->when)) {
-		/* bounce if we cannot lock */
-		add = maple_add_packet(maple_dev,
-			be32_to_cpu(maple_dev->devinfo.function),
+	struct maple_device *mdev = to_maple_dev(device);
+	if (mdev->interval > 0 && atomic_read(&mdev->busy) == 0 &&
+		time_after(jiffies, mdev->when)) {
+		/* bounce if we cannot add */
+		add = maple_add_packet(mdev,
+			be32_to_cpu(mdev->devinfo.function),
 			MAPLE_COMMAND_GETCOND, 1, NULL);
 		if (!add)
-			maple_dev->when = jiffies + maple_dev->interval;
+			mdev->when = jiffies + mdev->interval;
 	} else {
 		if (time_after(jiffies, maple_pnp_time))
-			/* This will also bounce */
-			maple_add_packet(maple_dev, 0,
-				MAPLE_COMMAND_DEVINFO, 0, NULL);
+			/* Ensure we don't have block reads and devinfo
+			* calls interfering with one another - so flag the
+			* device as busy */
+			if (atomic_read(&mdev->busy) == 0) {
+				atomic_set(&mdev->busy, 1);
+				maple_add_packet(mdev, 0,
+					MAPLE_COMMAND_DEVINFO, 0, NULL);
+			}
 	}
 	return 0;
 }
@@ -499,29 +445,50 @@ static int setup_maple_commands(struct device *device, void *ignored)
 /* VBLANK bottom half - implemented via workqueue */
 static void maple_vblank_handler(struct work_struct *work)
 {
-	if (!list_empty(&maple_sentq) || !maple_dma_done())
+	int x, locking;
+	struct maple_device *mdev;
+
+	if (!maple_dma_done())
 		return;
 
 	ctrl_outl(0, MAPLE_ENABLE);
 
+	if (!list_empty(&maple_sentq))
+		goto finish;
+
+	/*
+	* Set up essential commands - to fetch data and
+	* check devices are still present
+	*/
 	bus_for_each_dev(&maple_bus_type, NULL, NULL,
-			 setup_maple_commands);
+		setup_maple_commands);
+
+	if (time_after(jiffies, maple_pnp_time)) {
+		/*
+		* Scan the empty ports - bus is flakey and may have
+		* mis-reported emptyness
+		*/
+		for (x = 0; x < MAPLE_PORTS; x++) {
+			if (checked[x] && empty[x]) {
+				mdev = baseunits[x];
+				if (!mdev)
+					break;
+				atomic_set(&mdev->busy, 1);
+				locking = maple_add_packet(mdev, 0,
+					MAPLE_COMMAND_DEVINFO, 0, NULL);
+				if (!locking)
+					break;
+				}
+			}
 
-	if (time_after(jiffies, maple_pnp_time))
 		maple_pnp_time = jiffies + MAPLE_PNP_INTERVAL;
-
-	mutex_lock(&maple_wlist_lock);
-	if (!list_empty(&maple_waitq) && list_empty(&maple_sentq)) {
-		mutex_unlock(&maple_wlist_lock);
-		maple_send();
-	} else {
-		mutex_unlock(&maple_wlist_lock);
 	}
 
-	maplebus_dma_reset();
+finish:
+	maple_send();
 }
 
-/* handle devices added via hotplugs - placing them on queue for DEVINFO*/
+/* handle devices added via hotplugs - placing them on queue for DEVINFO */
 static void maple_map_subunits(struct maple_device *mdev, int submask)
 {
 	int retval, k, devcheck;
@@ -533,7 +500,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask)
 		ds.unit = k + 1;
 		retval =
 		    bus_for_each_dev(&maple_bus_type, NULL, &ds,
-				     detach_maple_device);
+				     check_maple_device);
 		if (retval) {
 			submask = submask >> 1;
 			continue;
@@ -543,6 +510,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask)
 			mdev_add = maple_alloc_dev(mdev->port, k + 1);
 			if (!mdev_add)
 				return;
+			atomic_set(&mdev_add->busy, 1);
 			maple_add_packet(mdev_add, 0, MAPLE_COMMAND_DEVINFO,
 				0, NULL);
 			/* mark that we are checking sub devices */
@@ -564,27 +532,45 @@ static void maple_clean_submap(struct maple_device *mdev)
 }
 
 /* handle empty port or hotplug removal */
-static void maple_response_none(struct maple_device *mdev,
-				struct mapleq *mq)
-{
-	if (mdev->unit != 0) {
-		list_del(&mq->list);
-		maple_clean_submap(mdev);
-		printk(KERN_INFO
-		       "Maple bus device detaching at (%d, %d)\n",
-		       mdev->port, mdev->unit);
+static void maple_response_none(struct maple_device *mdev)
+{
+	maple_clean_submap(mdev);
+
+	if (likely(mdev->unit != 0)) {
+		/*
+		* Block devices play up
+		* and give the impression they have
+		* been removed even when still in place or
+		* trip the mtd layer when they have
+		* really gone - this code traps that eventuality
+		* and ensures we aren't overloaded with useless
+		* error messages
+		*/
+		if (mdev->can_unload) {
+			if (!mdev->can_unload(mdev)) {
+				atomic_set(&mdev->busy, 2);
+				wake_up(&mdev->maple_wait);
+				return;
+			}
+		}
+
+		dev_info(&mdev->dev, "detaching device at (%d, %d)\n",
+			mdev->port, mdev->unit);
 		maple_detach_driver(mdev);
 		return;
-	}
-	if (!started || !fullscan) {
-		if (checked[mdev->port] == false) {
-			checked[mdev->port] = true;
-			printk(KERN_INFO "No maple devices attached"
-				" to port %d\n", mdev->port);
+	} else {
+		if (!started || !fullscan) {
+			if (checked[mdev->port] == false) {
+				checked[mdev->port] = true;
+				empty[mdev->port] = true;
+				dev_info(&mdev->dev, "no devices"
+					" to port %d\n", mdev->port);
+			}
+			return;
 		}
-		return;
 	}
-	maple_clean_submap(mdev);
+	/* Some hardware devices generate false detach messages on unit 0 */
+	atomic_set(&mdev->busy, 0);
 }
 
 /* preprocess hotplugs or scans */
@@ -599,8 +585,11 @@ static void maple_response_devinfo(struct maple_device *mdev,
 		} else {
 			if (mdev->unit != 0)
 				maple_attach_driver(mdev);
+			if (mdev->unit == 0) {
+				empty[mdev->port] = false;
+				maple_attach_driver(mdev);
+			}
 		}
-		return;
 	}
 	if (mdev->unit == 0) {
 		submask = recvbuf[2] & 0x1F;
@@ -611,6 +600,17 @@ static void maple_response_devinfo(struct maple_device *mdev,
 	}
 }
 
+static void maple_response_fileerr(struct maple_device *mdev, void *recvbuf)
+{
+	if (mdev->fileerr_handler) {
+		mdev->fileerr_handler(mdev, recvbuf);
+		return;
+	} else
+		dev_warn(&mdev->dev, "device at (%d, %d) reports"
+			"file error 0x%X\n", mdev->port, mdev->unit,
+			((int *)recvbuf)[1]);
+}
+
 static void maple_port_rescan(void)
 {
 	int i;
@@ -621,12 +621,6 @@ static void maple_port_rescan(void)
 		if (checked[i] == false) {
 			fullscan = 0;
 			mdev = baseunits[i];
-			/*
-			 *  test lock in case scan has failed
-			 *  but device is still locked
-			 */
-			if (mutex_is_locked(&mdev->mq->mutex))
-				mutex_unlock(&mdev->mq->mutex);
 			maple_add_packet(mdev, 0, MAPLE_COMMAND_DEVINFO,
 				0, NULL);
 		}
@@ -637,7 +631,7 @@ static void maple_port_rescan(void)
 static void maple_dma_handler(struct work_struct *work)
 {
 	struct mapleq *mq, *nmq;
-	struct maple_device *dev;
+	struct maple_device *mdev;
 	char *recvbuf;
 	enum maple_code code;
 
@@ -646,43 +640,56 @@ static void maple_dma_handler(struct work_struct *work)
 	ctrl_outl(0, MAPLE_ENABLE);
 	if (!list_empty(&maple_sentq)) {
 		list_for_each_entry_safe(mq, nmq, &maple_sentq, list) {
-			recvbuf = mq->recvbuf;
+			mdev = mq->dev;
+			recvbuf = mq->recvbuf->buf;
+			dma_cache_sync(&mdev->dev, recvbuf, 0x400,
+				DMA_FROM_DEVICE);
 			code = recvbuf[0];
-			dev = mq->dev;
 			kfree(mq->sendbuf);
-			mutex_unlock(&mq->mutex);
 			list_del_init(&mq->list);
-
 			switch (code) {
 			case MAPLE_RESPONSE_NONE:
-				maple_response_none(dev, mq);
+				maple_response_none(mdev);
 				break;
 
 			case MAPLE_RESPONSE_DEVINFO:
-				maple_response_devinfo(dev, recvbuf);
+				maple_response_devinfo(mdev, recvbuf);
+				atomic_set(&mdev->busy, 0);
 				break;
 
 			case MAPLE_RESPONSE_DATATRF:
-				if (dev->callback)
-					dev->callback(mq);
+				if (mdev->callback)
+					mdev->callback(mq);
+				atomic_set(&mdev->busy, 0);
+				wake_up(&mdev->maple_wait);
 				break;
 
 			case MAPLE_RESPONSE_FILEERR:
+				maple_response_fileerr(mdev, recvbuf);
+				atomic_set(&mdev->busy, 0);
+				wake_up(&mdev->maple_wait);
+				break;
+
 			case MAPLE_RESPONSE_AGAIN:
 			case MAPLE_RESPONSE_BADCMD:
 			case MAPLE_RESPONSE_BADFUNC:
-				printk(KERN_DEBUG
-				       "Maple non-fatal error 0x%X\n",
-				       code);
+				dev_warn(&mdev->dev, "non-fatal error"
+					" 0x%X at (%d, %d)\n", code,
+					mdev->port, mdev->unit);
+				atomic_set(&mdev->busy, 0);
 				break;
 
 			case MAPLE_RESPONSE_ALLINFO:
-				printk(KERN_DEBUG
-				       "Maple - extended device information"
-					" not supported\n");
+				dev_notice(&mdev->dev, "extended"
+				" device information request for (%d, %d)"
+				" but call is not supported\n", mdev->port,
+				mdev->unit);
+				atomic_set(&mdev->busy, 0);
 				break;
 
 			case MAPLE_RESPONSE_OK:
+				atomic_set(&mdev->busy, 0);
+				wake_up(&mdev->maple_wait);
 				break;
 
 			default:
@@ -699,20 +706,19 @@ static void maple_dma_handler(struct work_struct *work)
 		if (!fullscan)
 			maple_port_rescan();
 		/* mark that we have been through the first scan */
-		if (started == 0)
-			started = 1;
+		started = 1;
 	}
-	maplebus_dma_reset();
+	maple_send();
 }
 
-static irqreturn_t maplebus_dma_interrupt(int irq, void *dev_id)
+static irqreturn_t maple_dma_interrupt(int irq, void *dev_id)
 {
 	/* Load everything into the bottom half */
 	schedule_work(&maple_dma_process);
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t maplebus_vblank_interrupt(int irq, void *dev_id)
+static irqreturn_t maple_vblank_interrupt(int irq, void *dev_id)
 {
 	schedule_work(&maple_vblank_process);
 	return IRQ_HANDLED;
@@ -720,14 +726,14 @@ static irqreturn_t maplebus_vblank_interrupt(int irq, void *dev_id)
 
 static int maple_set_dma_interrupt_handler(void)
 {
-	return request_irq(HW_EVENT_MAPLE_DMA, maplebus_dma_interrupt,
-		IRQF_SHARED, "maple bus DMA", &maple_dummy_driver);
+	return request_irq(HW_EVENT_MAPLE_DMA, maple_dma_interrupt,
+		IRQF_SHARED, "maple bus DMA", &maple_unsupported_device);
 }
 
 static int maple_set_vblank_interrupt_handler(void)
 {
-	return request_irq(HW_EVENT_VSYNC, maplebus_vblank_interrupt,
-		IRQF_SHARED, "maple bus VBLANK", &maple_dummy_driver);
+	return request_irq(HW_EVENT_VSYNC, maple_vblank_interrupt,
+		IRQF_SHARED, "maple bus VBLANK", &maple_unsupported_device);
 }
 
 static int maple_get_dma_buffer(void)
@@ -740,7 +746,7 @@ static int maple_get_dma_buffer(void)
 	return 0;
 }
 
-static int match_maple_bus_driver(struct device *devptr,
+static int maple_match_bus_driver(struct device *devptr,
 				  struct device_driver *drvptr)
 {
 	struct maple_driver *maple_drv = to_maple_driver(drvptr);
@@ -765,22 +771,24 @@ static void maple_bus_release(struct device *dev)
 {
 }
 
-static struct maple_driver maple_dummy_driver = {
+static struct maple_driver maple_unsupported_device = {
 	.drv = {
-		.name = "maple_dummy_driver",
+		.name = "maple_unsupported_device",
 		.bus = &maple_bus_type,
 	},
 };
-
+/**
+ * maple_bus_type - core maple bus structure
+ */
 struct bus_type maple_bus_type = {
 	.name = "maple",
-	.match = match_maple_bus_driver,
+	.match = maple_match_bus_driver,
 	.uevent = maple_bus_uevent,
 };
 EXPORT_SYMBOL_GPL(maple_bus_type);
 
 static struct device maple_bus = {
-	.bus_id = "maple",
+	.init_name = "maple",
 	.release = maple_bus_release,
 };
 
@@ -788,7 +796,8 @@ static int __init maple_bus_init(void)
 {
 	int retval, i;
 	struct maple_device *mdev[MAPLE_PORTS];
-	ctrl_outl(0, MAPLE_STATE);
+
+	ctrl_outl(0, MAPLE_ENABLE);
 
 	retval = device_register(&maple_bus);
 	if (retval)
@@ -798,36 +807,33 @@ static int __init maple_bus_init(void)
 	if (retval)
 		goto cleanup_device;
 
-	retval = driver_register(&maple_dummy_driver.drv);
+	retval = driver_register(&maple_unsupported_device.drv);
 	if (retval)
 		goto cleanup_bus;
 
 	/* allocate memory for maple bus dma */
 	retval = maple_get_dma_buffer();
 	if (retval) {
-		printk(KERN_INFO
-		       "Maple bus: Failed to allocate Maple DMA buffers\n");
+		dev_err(&maple_bus, "failed to allocate DMA buffers\n");
 		goto cleanup_basic;
 	}
 
 	/* set up DMA interrupt handler */
 	retval = maple_set_dma_interrupt_handler();
 	if (retval) {
-		printk(KERN_INFO
-		       "Maple bus: Failed to grab maple DMA IRQ\n");
+		dev_err(&maple_bus, "bus failed to grab maple "
+			"DMA IRQ\n");
 		goto cleanup_dma;
 	}
 
 	/* set up VBLANK interrupt handler */
 	retval = maple_set_vblank_interrupt_handler();
 	if (retval) {
-		printk(KERN_INFO "Maple bus: Failed to grab VBLANK IRQ\n");
+		dev_err(&maple_bus, "bus failed to grab VBLANK IRQ\n");
 		goto cleanup_irq;
 	}
 
-	maple_queue_cache =
-	    kmem_cache_create("maple_queue_cache", 0x400, 0,
-			      SLAB_HWCACHE_ALIGN, NULL);
+	maple_queue_cache = KMEM_CACHE(maple_buffer, SLAB_HWCACHE_ALIGN);
 
 	if (!maple_queue_cache)
 		goto cleanup_bothirqs;
@@ -838,23 +844,23 @@ static int __init maple_bus_init(void)
 	/* setup maple ports */
 	for (i = 0; i < MAPLE_PORTS; i++) {
 		checked[i] = false;
+		empty[i] = false;
 		mdev[i] = maple_alloc_dev(i, 0);
-		baseunits[i] = mdev[i];
 		if (!mdev[i]) {
 			while (i-- > 0)
 				maple_free_dev(mdev[i]);
 			goto cleanup_cache;
 		}
+		baseunits[i] = mdev[i];
+		atomic_set(&mdev[i]->busy, 1);
 		maple_add_packet(mdev[i], 0, MAPLE_COMMAND_DEVINFO, 0, NULL);
 		subdevice_map[i] = 0;
 	}
 
-	/* setup maplebus hardware */
-	maplebus_dma_reset();
-	/* initial detection */
+	maple_pnp_time = jiffies + HZ;
+	/* prepare initial queue */
 	maple_send();
-	maple_pnp_time = jiffies;
-	printk(KERN_INFO "Maple bus core now registered.\n");
+	dev_info(&maple_bus, "bus core now registered\n");
 
 	return 0;
 
@@ -871,7 +877,7 @@ cleanup_dma:
 	free_pages((unsigned long) maple_sendbuf, MAPLE_DMA_PAGES);
 
 cleanup_basic:
-	driver_unregister(&maple_dummy_driver.drv);
+	driver_unregister(&maple_unsupported_device.drv);
 
 cleanup_bus:
 	bus_unregister(&maple_bus_type);
@@ -880,7 +886,7 @@ cleanup_device:
 	device_unregister(&maple_bus);
 
 cleanup:
-	printk(KERN_INFO "Maple bus registration failed\n");
+	printk(KERN_ERR "Maple bus registration failed\n");
 	return retval;
 }
 /* Push init to later to ensure hardware gets detected */
diff --git a/drivers/sh/superhyway/superhyway.c b/drivers/sh/superhyway/superhyway.c
index 4d0282b821b5..2d9e7f3d5611 100644
--- a/drivers/sh/superhyway/superhyway.c
+++ b/drivers/sh/superhyway/superhyway.c
@@ -22,7 +22,7 @@
 static int superhyway_devices;
 
 static struct device superhyway_bus_device = {
-	.bus_id = "superhyway",
+	.init_name = "superhyway",
 };
 
 static void superhyway_device_release(struct device *dev)
@@ -83,7 +83,7 @@ int superhyway_add_device(unsigned long base, struct superhyway_device *sdev,
 	dev->id.id		= dev->vcr.mod_id;
 
 	sprintf(dev->name, "SuperHyway device %04x", dev->id.id);
-	sprintf(dev->dev.bus_id, "%02x", superhyway_devices);
+	dev_set_name(&dev->dev, "%02x", superhyway_devices);
 
 	superhyway_devices++;
 
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 83babb0a1df7..c6c816b7ecb5 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -47,6 +47,7 @@ config USB_ARCH_HAS_OHCI
 	default y if CPU_SUBTYPE_SH7720
 	default y if CPU_SUBTYPE_SH7721
 	default y if CPU_SUBTYPE_SH7763
+	default y if CPU_SUBTYPE_SH7786
 	# more:
 	default PCI
 
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 5cf5f1eca4f4..7658589edb1c 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1049,7 +1049,8 @@ MODULE_LICENSE ("GPL");
 
 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
-    defined(CONFIG_CPU_SUBTYPE_SH7763)
+    defined(CONFIG_CPU_SUBTYPE_SH7763) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7786)
 #include "ohci-sh.c"
 #define PLATFORM_DRIVER		ohci_hcd_sh_driver
 #endif
diff --git a/drivers/video/pvr2fb.c b/drivers/video/pvr2fb.c
index 0a0fd48a8566..53f8f1100e81 100644
--- a/drivers/video/pvr2fb.c
+++ b/drivers/video/pvr2fb.c
@@ -61,7 +61,7 @@
 #include <mach-dreamcast/mach/sysasic.h>
 #endif
 
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 #include <linux/pagemap.h>
 #include <mach/dma.h>
 #include <asm/dma.h>
@@ -188,7 +188,7 @@ static unsigned int is_blanked = 0;		/* Is the screen blanked? */
 static unsigned long pvr2fb_map;
 #endif
 
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 static unsigned int shdma = PVR2_CASCADE_CHAN;
 static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS;
 #endif
@@ -207,7 +207,7 @@ static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id);
 static int pvr2_init_cable(void);
 static int pvr2_get_param(const struct pvr2_params *p, const char *s,
                             int val, int size);
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
 			    size_t count, loff_t *ppos);
 #endif
@@ -218,7 +218,7 @@ static struct fb_ops pvr2fb_ops = {
 	.fb_blank	= pvr2fb_blank,
 	.fb_check_var	= pvr2fb_check_var,
 	.fb_set_par	= pvr2fb_set_par,
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 	.fb_write	= pvr2fb_write,
 #endif
 	.fb_fillrect	= cfb_fillrect,
@@ -671,7 +671,7 @@ static int pvr2_init_cable(void)
 	return cable_type;
 }
 
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
 			    size_t count, loff_t *ppos)
 {
@@ -743,7 +743,7 @@ out_unmap:
 
 	return ret;
 }
-#endif /* CONFIG_SH_DMA */
+#endif /* CONFIG_PVR2_DMA */
 
 /**
  * pvr2fb_common_init
@@ -893,7 +893,7 @@ static int __init pvr2fb_dc_init(void)
 		return -EBUSY;
 	}
 
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 	if (request_dma(pvr2dma, "pvr2") != 0) {
 		free_irq(HW_EVENT_VSYNC, 0);
 		return -EBUSY;
@@ -915,7 +915,7 @@ static void __exit pvr2fb_dc_exit(void)
 	}
 
 	free_irq(HW_EVENT_VSYNC, 0);
-#ifdef CONFIG_SH_DMA
+#ifdef CONFIG_PVR2_DMA
 	free_dma(pvr2dma);
 #endif
 }
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index 2c5d069e5f06..b433b8ac76d9 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -33,6 +33,8 @@ struct sh_mobile_lcdc_chan {
 	struct fb_info info;
 	dma_addr_t dma_handle;
 	struct fb_deferred_io defio;
+	unsigned long frame_end;
+	wait_queue_head_t frame_end_wait;
 };
 
 struct sh_mobile_lcdc_priv {
@@ -226,7 +228,10 @@ static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 {
 	struct sh_mobile_lcdc_priv *priv = data;
+	struct sh_mobile_lcdc_chan *ch;
 	unsigned long tmp;
+	int is_sub;
+	int k;
 
 	/* acknowledge interrupt */
 	tmp = lcdc_read(priv, _LDINTR);
@@ -234,8 +239,24 @@ static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 	tmp |= 0x000000ff ^ LDINTR_FS; /* status in low 8 */
 	lcdc_write(priv, _LDINTR, tmp);
 
-	/* disable clocks */
-	sh_mobile_lcdc_clk_off(priv);
+	/* figure out if this interrupt is for main or sub lcd */
+	is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
+
+	/* wake up channel and disable clocks*/
+	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
+		ch = &priv->ch[k];
+
+		if (!ch->enabled)
+			continue;
+
+		if (is_sub == lcdc_chan_is_sublcd(ch)) {
+			ch->frame_end = 1;
+			wake_up(&ch->frame_end_wait);
+
+			sh_mobile_lcdc_clk_off(priv);
+		}
+	}
+
 	return IRQ_HANDLED;
 }
 
@@ -448,18 +469,27 @@ static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 	struct sh_mobile_lcdc_board_cfg	*board_cfg;
 	int k;
 
-	/* tell the board code to disable the panel */
+	/* clean up deferred io and ask board code to disable panel */
 	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 		ch = &priv->ch[k];
-		board_cfg = &ch->cfg.board_cfg;
-		if (board_cfg->display_off)
-			board_cfg->display_off(board_cfg->board_data);
 
-		/* cleanup deferred io if enabled */
+		/* deferred io mode:
+		 * flush frame, and wait for frame end interrupt
+		 * clean up deferred io and enable clock
+		 */
 		if (ch->info.fbdefio) {
+			ch->frame_end = 0;
+			schedule_delayed_work(&ch->info.deferred_work, 0);
+			wait_event(ch->frame_end_wait, ch->frame_end);
 			fb_deferred_io_cleanup(&ch->info);
 			ch->info.fbdefio = NULL;
+			sh_mobile_lcdc_clk_on(priv);
 		}
+
+		board_cfg = &ch->cfg.board_cfg;
+		if (board_cfg->display_off)
+			board_cfg->display_off(board_cfg->board_data);
+
 	}
 
 	/* stop the lcdc */
@@ -652,6 +682,26 @@ static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
 	return 0;
 }
 
+static int sh_mobile_lcdc_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
+	return 0;
+}
+
+static int sh_mobile_lcdc_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
+}
+
+static struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
+	.suspend = sh_mobile_lcdc_suspend,
+	.resume = sh_mobile_lcdc_resume,
+};
+
 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
 
 static int __init sh_mobile_lcdc_probe(struct platform_device *pdev)
@@ -707,6 +757,7 @@ static int __init sh_mobile_lcdc_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "unsupported interface type\n");
 			goto err1;
 		}
+		init_waitqueue_head(&priv->ch[i].frame_end_wait);
 
 		switch (pdata->ch[i].chan) {
 		case LCDC_CHAN_MAINLCD:
@@ -860,6 +911,7 @@ static struct platform_driver sh_mobile_lcdc_driver = {
 	.driver		= {
 		.name		= "sh_mobile_lcdc_fb",
 		.owner		= THIS_MODULE,
+		.pm		= &sh_mobile_lcdc_dev_pm_ops,
 	},
 	.probe		= sh_mobile_lcdc_probe,
 	.remove		= sh_mobile_lcdc_remove,