Merge branch for-rmk-devel of git://aeryn.fluff.org.uk/bjdooks/linux into devel

18 files changed, 1572 insertions, 8 deletions

diff --git a/arch/arm/plat-s3c64xx/Kconfig b/arch/arm/plat-s3c64xx/Kconfig
index 54375a00a7d2..5ebd8b425a54 100644
--- a/arch/arm/plat-s3c64xx/Kconfig
+++ b/arch/arm/plat-s3c64xx/Kconfig
@@ -19,6 +19,7 @@ config PLAT_S3C64XX
 	select S3C_GPIO_PULL_UPDOWN
 	select S3C_GPIO_CFG_S3C24XX
 	select S3C_GPIO_CFG_S3C64XX
+	select USB_ARCH_HAS_OHCI
 	help
 	  Base platform code for any Samsung S3C64XX device
 
@@ -38,6 +39,10 @@ config CPU_S3C6400_CLOCK
 	  Common clock support code for the S3C6400 that is shared
 	  by other CPUs in the series, such as the S3C6410.
 
+config S3C64XX_DMA
+	bool "S3C64XX DMA"
+	select S3C_DMA
+
 # platform specific device setup
 
 config S3C64XX_SETUP_I2C0
@@ -59,4 +64,9 @@ config S3C64XX_SETUP_FB_24BPP
 	help
 	  Common setup code for S3C64XX with an 24bpp RGB display helper.
 
+config S3C64XX_SETUP_SDHCI_GPIO
+	bool
+	help
+	  Common setup code for S3C64XX SDHCI GPIO configurations
+
 endif
diff --git a/arch/arm/plat-s3c64xx/Makefile b/arch/arm/plat-s3c64xx/Makefile
index 2e6d79bf8f33..2ed5df34f9ea 100644
--- a/arch/arm/plat-s3c64xx/Makefile
+++ b/arch/arm/plat-s3c64xx/Makefile
@@ -24,8 +24,19 @@ obj-y				+= gpiolib.o
 obj-$(CONFIG_CPU_S3C6400_INIT)	+= s3c6400-init.o
 obj-$(CONFIG_CPU_S3C6400_CLOCK)	+= s3c6400-clock.o
 
+# PM support
+
+obj-$(CONFIG_PM)		+= pm.o
+obj-$(CONFIG_PM)		+= sleep.o
+obj-$(CONFIG_PM)		+= irq-pm.o
+
+# DMA support
+
+obj-$(CONFIG_S3C64XX_DMA)	+= dma.o
+
 # Device setup
 
 obj-$(CONFIG_S3C64XX_SETUP_I2C0) += setup-i2c0.o
 obj-$(CONFIG_S3C64XX_SETUP_I2C1) += setup-i2c1.o
 obj-$(CONFIG_S3C64XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
+obj-$(CONFIG_S3C64XX_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
\ No newline at end of file
diff --git a/arch/arm/plat-s3c64xx/clock.c b/arch/arm/plat-s3c64xx/clock.c
index ad1b9682c9c3..0bc2fa1dfc40 100644
--- a/arch/arm/plat-s3c64xx/clock.c
+++ b/arch/arm/plat-s3c64xx/clock.c
@@ -27,6 +27,12 @@
 #include <plat/devs.h>
 #include <plat/clock.h>
 
+struct clk clk_h2 = {
+	.name		= "hclk2",
+	.id		= -1,
+	.rate		= 0,
+};
+
 struct clk clk_27m = {
 	.name		= "clk_27m",
 	.id		= -1,
@@ -152,6 +158,18 @@ static struct clk init_clocks_disable[] = {
 		.parent		= &clk_48m,
 		.enable		= s3c64xx_sclk_ctrl,
 		.ctrlbit	= S3C_CLKCON_SCLK_MMC2_48,
+	}, {
+		.name		= "dma0",
+		.id		= -1,
+		.parent		= &clk_h,
+		.enable		= s3c64xx_hclk_ctrl,
+		.ctrlbit	= S3C_CLKCON_HCLK_DMA0,
+	}, {
+		.name		= "dma1",
+		.id		= -1,
+		.parent		= &clk_h,
+		.enable		= s3c64xx_hclk_ctrl,
+		.ctrlbit	= S3C_CLKCON_HCLK_DMA1,
 	},
 };
 
@@ -246,6 +264,7 @@ static struct clk *clks[] __initdata = {
 	&clk_epll,
 	&clk_27m,
 	&clk_48m,
+	&clk_h2,
 };
 
 void __init s3c64xx_register_clocks(void)
diff --git a/arch/arm/plat-s3c64xx/cpu.c b/arch/arm/plat-s3c64xx/cpu.c
index 91f49a3a665d..b1fdd83940a6 100644
--- a/arch/arm/plat-s3c64xx/cpu.c
+++ b/arch/arm/plat-s3c64xx/cpu.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
+#include <linux/sysdev.h>
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
@@ -101,9 +102,24 @@ static struct map_desc s3c_iodesc[] __initdata = {
 		.pfn		= __phys_to_pfn(S3C64XX_PA_MODEM),
 		.length		= SZ_4K,
 		.type		= MT_DEVICE,
+	}, {
+		.virtual	= (unsigned long)S3C_VA_WATCHDOG,
+		.pfn		= __phys_to_pfn(S3C64XX_PA_WATCHDOG),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
 	},
 };
 
+
+struct sysdev_class s3c64xx_sysclass = {
+	.name	= "s3c64xx-core",
+};
+
+static struct sys_device s3c64xx_sysdev = {
+	.cls	= &s3c64xx_sysclass,
+};
+
+
 /* read cpu identification code */
 
 void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
@@ -115,5 +131,21 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
 	iotable_init(mach_desc, size);
 
 	idcode = __raw_readl(S3C_VA_SYS + 0x118);
+	if (!idcode) {
+		/* S3C6400 has the ID register in a different place,
+		 * and needs a write before it can be read. */
+
+		__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
+		idcode = __raw_readl(S3C_VA_SYS + 0xA1C);
+	}
+
 	s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
+
+static __init int s3c64xx_sysdev_init(void)
+{
+	sysdev_class_register(&s3c64xx_sysclass);
+	return sysdev_register(&s3c64xx_sysdev);
+}
+
+core_initcall(s3c64xx_sysdev_init);
diff --git a/arch/arm/plat-s3c64xx/dma.c b/arch/arm/plat-s3c64xx/dma.c
new file mode 100644
index 000000000000..67aa93dbb69e
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/dma.c
@@ -0,0 +1,722 @@
+/* linux/arch/arm/plat-s3c64xx/dma.c
+ *
+ * Copyright 2009 Openmoko, Inc.
+ * Copyright 2009 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX DMA core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/dmapool.h>
+#include <linux/sysdev.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <mach/dma.h>
+#include <mach/map.h>
+#include <mach/irqs.h>
+
+#include <plat/dma-plat.h>
+#include <plat/regs-sys.h>
+
+#include <asm/hardware/pl080.h>
+
+/* dma channel state information */
+
+struct s3c64xx_dmac {
+	struct sys_device	 sysdev;
+	struct clk		*clk;
+	void __iomem		*regs;
+	struct s3c2410_dma_chan *channels;
+	enum dma_ch		 chanbase;
+};
+
+/* pool to provide LLI buffers */
+static struct dma_pool *dma_pool;
+
+/* Debug configuration and code */
+
+static unsigned char debug_show_buffs = 0;
+
+static void dbg_showchan(struct s3c2410_dma_chan *chan)
+{
+	pr_debug("DMA%d: %08x->%08x L %08x C %08x,%08x S %08x\n",
+		 chan->number,
+		 readl(chan->regs + PL080_CH_SRC_ADDR),
+		 readl(chan->regs + PL080_CH_DST_ADDR),
+		 readl(chan->regs + PL080_CH_LLI),
+		 readl(chan->regs + PL080_CH_CONTROL),
+		 readl(chan->regs + PL080S_CH_CONTROL2),
+		 readl(chan->regs + PL080S_CH_CONFIG));
+}
+
+static void show_lli(struct pl080s_lli *lli)
+{
+	pr_debug("LLI[%p] %08x->%08x, NL %08x C %08x,%08x\n",
+		 lli, lli->src_addr, lli->dst_addr, lli->next_lli,
+		 lli->control0, lli->control1);
+}
+
+static void dbg_showbuffs(struct s3c2410_dma_chan *chan)
+{
+	struct s3c64xx_dma_buff *ptr;
+	struct s3c64xx_dma_buff *end;
+
+	pr_debug("DMA%d: buffs next %p, curr %p, end %p\n",
+		 chan->number, chan->next, chan->curr, chan->end);
+
+	ptr = chan->next;
+	end = chan->end;
+
+	if (debug_show_buffs) {
+		for (; ptr != NULL; ptr = ptr->next) {
+			pr_debug("DMA%d: %08x ",
+				 chan->number, ptr->lli_dma);
+			show_lli(ptr->lli);
+		}
+	}
+}
+
+/* End of Debug */
+
+static struct s3c2410_dma_chan *s3c64xx_dma_map_channel(unsigned int channel)
+{
+	struct s3c2410_dma_chan *chan;
+	unsigned int start, offs;
+
+	start = 0;
+
+	if (channel >= DMACH_PCM1_TX)
+		start = 8;
+
+	for (offs = 0; offs < 8; offs++) {
+		chan = &s3c2410_chans[start + offs];
+		if (!chan->in_use)
+			goto found;
+	}
+
+	return NULL;
+
+found:
+	s3c_dma_chan_map[channel] = chan;
+	return chan;
+}
+
+int s3c2410_dma_config(unsigned int channel, int xferunit)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	switch (xferunit) {
+	case 1:
+		chan->hw_width = 0;
+		break;
+	case 2:
+		chan->hw_width = 1;
+		break;
+	case 4:
+		chan->hw_width = 2;
+		break;
+	default:
+		printk(KERN_ERR "%s: illegal width %d\n", __func__, xferunit);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_config);
+
+static void s3c64xx_dma_fill_lli(struct s3c2410_dma_chan *chan,
+				 struct pl080s_lli *lli,
+				 dma_addr_t data, int size)
+{
+	dma_addr_t src, dst;
+	u32 control0, control1;
+
+	switch (chan->source) {
+	case S3C2410_DMASRC_HW:
+		src = chan->dev_addr;
+		dst = data;
+		control0 = PL080_CONTROL_SRC_AHB2;
+		control0 |= (u32)chan->hw_width << PL080_CONTROL_SWIDTH_SHIFT;
+		control0 |= 2 << PL080_CONTROL_DWIDTH_SHIFT;
+		control0 |= PL080_CONTROL_DST_INCR;
+		break;
+
+	case S3C2410_DMASRC_MEM:
+		src = data;
+		dst = chan->dev_addr;
+		control0 = PL080_CONTROL_DST_AHB2;
+		control0 |= (u32)chan->hw_width << PL080_CONTROL_DWIDTH_SHIFT;
+		control0 |= 2 << PL080_CONTROL_SWIDTH_SHIFT;
+		control0 |= PL080_CONTROL_SRC_INCR;
+		break;
+	default:
+		BUG();
+	}
+
+	/* note, we do not currently setup any of the burst controls */
+
+	control1 = size >> chan->hw_width;	/* size in no of xfers */
+	control0 |= PL080_CONTROL_PROT_SYS;	/* always in priv. mode */
+	control0 |= PL080_CONTROL_TC_IRQ_EN;	/* always fire IRQ */
+
+	lli->src_addr = src;
+	lli->dst_addr = dst;
+	lli->next_lli = 0;
+	lli->control0 = control0;
+	lli->control1 = control1;
+}
+
+static void s3c64xx_lli_to_regs(struct s3c2410_dma_chan *chan,
+				struct pl080s_lli *lli)
+{
+	void __iomem *regs = chan->regs;
+
+	pr_debug("%s: LLI %p => regs\n", __func__, lli);
+	show_lli(lli);
+
+	writel(lli->src_addr, regs + PL080_CH_SRC_ADDR);
+	writel(lli->dst_addr, regs + PL080_CH_DST_ADDR);
+	writel(lli->next_lli, regs + PL080_CH_LLI);
+	writel(lli->control0, regs + PL080_CH_CONTROL);
+	writel(lli->control1, regs + PL080S_CH_CONTROL2);
+}
+
+static int s3c64xx_dma_start(struct s3c2410_dma_chan *chan)
+{
+	struct s3c64xx_dmac *dmac = chan->dmac;
+	u32 config;
+	u32 bit = chan->bit;
+
+	dbg_showchan(chan);
+
+	pr_debug("%s: clearing interrupts\n", __func__);
+
+	/* clear interrupts */
+	writel(bit, dmac->regs + PL080_TC_CLEAR);
+	writel(bit, dmac->regs + PL080_ERR_CLEAR);
+
+	pr_debug("%s: starting channel\n", __func__);
+
+	config = readl(chan->regs + PL080S_CH_CONFIG);
+	config |= PL080_CONFIG_ENABLE;
+
+	pr_debug("%s: writing config %08x\n", __func__, config);
+	writel(config, chan->regs + PL080S_CH_CONFIG);
+
+	return 0;
+}
+
+static int s3c64xx_dma_stop(struct s3c2410_dma_chan *chan)
+{
+	u32 config;
+	int timeout;
+
+	pr_debug("%s: stopping channel\n", __func__);
+
+	dbg_showchan(chan);
+
+	config = readl(chan->regs + PL080S_CH_CONFIG);
+	config |= PL080_CONFIG_HALT;
+	writel(config, chan->regs + PL080S_CH_CONFIG);
+
+	timeout = 1000;
+	do {
+		config = readl(chan->regs + PL080S_CH_CONFIG);
+		pr_debug("%s: %d - config %08x\n", __func__, timeout, config);
+		if (config & PL080_CONFIG_ACTIVE)
+			udelay(10);
+		else
+			break;
+		} while (--timeout > 0);
+
+	if (config & PL080_CONFIG_ACTIVE) {
+		printk(KERN_ERR "%s: channel still active\n", __func__);
+		return -EFAULT;
+	}
+
+	config = readl(chan->regs + PL080S_CH_CONFIG);
+	config &= ~PL080_CONFIG_ENABLE;
+	writel(config, chan->regs + PL080S_CH_CONFIG);
+
+	return 0;
+}
+
+static inline void s3c64xx_dma_bufffdone(struct s3c2410_dma_chan *chan,
+					 struct s3c64xx_dma_buff *buf,
+					 enum s3c2410_dma_buffresult result)
+{
+	if (chan->callback_fn != NULL)
+		(chan->callback_fn)(chan, buf->pw, 0, result);
+}
+
+static void s3c64xx_dma_freebuff(struct s3c64xx_dma_buff *buff)
+{
+	dma_pool_free(dma_pool, buff->lli, buff->lli_dma);
+	kfree(buff);
+}
+
+static int s3c64xx_dma_flush(struct s3c2410_dma_chan *chan)
+{
+	struct s3c64xx_dma_buff *buff, *next;
+	u32 config;
+
+	dbg_showchan(chan);
+
+	pr_debug("%s: flushing channel\n", __func__);
+
+	config = readl(chan->regs + PL080S_CH_CONFIG);
+	config &= ~PL080_CONFIG_ENABLE;
+	writel(config, chan->regs + PL080S_CH_CONFIG);
+
+	/* dump all the buffers associated with this channel */
+
+	for (buff = chan->curr; buff != NULL; buff = next) {
+		next = buff->next;
+		pr_debug("%s: buff %p (next %p)\n", __func__, buff, buff->next);
+
+		s3c64xx_dma_bufffdone(chan, buff, S3C2410_RES_ABORT);
+		s3c64xx_dma_freebuff(buff);
+	}
+
+	chan->curr = chan->next = chan->end = NULL;
+
+	return 0;
+}
+
+int s3c2410_dma_ctrl(unsigned int channel, enum s3c2410_chan_op op)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	WARN_ON(!chan);
+	if (!chan)
+		return -EINVAL;
+
+	switch (op) {
+	case S3C2410_DMAOP_START:
+		return s3c64xx_dma_start(chan);
+
+	case S3C2410_DMAOP_STOP:
+		return s3c64xx_dma_stop(chan);
+
+	case S3C2410_DMAOP_FLUSH:
+		return s3c64xx_dma_flush(chan);
+
+	/* belive PAUSE/RESUME are no-ops */
+	case S3C2410_DMAOP_PAUSE:
+	case S3C2410_DMAOP_RESUME:
+	case S3C2410_DMAOP_STARTED:
+	case S3C2410_DMAOP_TIMEOUT:
+		return 0;
+	}
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL(s3c2410_dma_ctrl);
+
+/* s3c2410_dma_enque
+ *
+ */
+
+int s3c2410_dma_enqueue(unsigned int channel, void *id,
+			dma_addr_t data, int size)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+	struct s3c64xx_dma_buff *next;
+	struct s3c64xx_dma_buff *buff;
+	struct pl080s_lli *lli;
+	int ret;
+
+	WARN_ON(!chan);
+	if (!chan)
+		return -EINVAL;
+
+	buff = kzalloc(sizeof(struct s3c64xx_dma_buff), GFP_KERNEL);
+	if (!buff) {
+		printk(KERN_ERR "%s: no memory for buffer\n", __func__);
+		return -ENOMEM;
+	}
+
+	lli = dma_pool_alloc(dma_pool, GFP_KERNEL, &buff->lli_dma);
+	if (!lli) {
+		printk(KERN_ERR "%s: no memory for lli\n", __func__);
+		ret = -ENOMEM;
+		goto err_buff;
+	}
+
+	pr_debug("%s: buff %p, dp %08x lli (%p, %08x) %d\n",
+		 __func__, buff, data, lli, (u32)buff->lli_dma, size);
+
+	buff->lli = lli;
+	buff->pw = id;
+
+	s3c64xx_dma_fill_lli(chan, lli, data, size);
+
+	if ((next = chan->next) != NULL) {
+		struct s3c64xx_dma_buff *end = chan->end;
+		struct pl080s_lli *endlli = end->lli;
+
+		pr_debug("enquing onto channel\n");
+
+		end->next = buff;
+		endlli->next_lli = buff->lli_dma;
+
+		if (chan->flags & S3C2410_DMAF_CIRCULAR) {
+			struct s3c64xx_dma_buff *curr = chan->curr;
+			lli->next_lli = curr->lli_dma;
+		}
+
+		if (next == chan->curr) {
+			writel(buff->lli_dma, chan->regs + PL080_CH_LLI);
+			chan->next = buff;
+		}
+
+		show_lli(endlli);
+		chan->end = buff;
+	} else {
+		pr_debug("enquing onto empty channel\n");
+
+		chan->curr = buff;
+		chan->next = buff;
+		chan->end = buff;
+
+		s3c64xx_lli_to_regs(chan, lli);
+	}
+
+	show_lli(lli);
+
+	dbg_showchan(chan);
+	dbg_showbuffs(chan);
+	return 0;
+
+err_buff:
+	kfree(buff);
+	return ret;
+}
+
+EXPORT_SYMBOL(s3c2410_dma_enqueue);
+
+
+int s3c2410_dma_devconfig(int channel,
+			  enum s3c2410_dmasrc source,
+			  unsigned long devaddr)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+	u32 peripheral;
+	u32 config = 0;
+
+	pr_debug("%s: channel %d, source %d, dev %08lx, chan %p\n",
+		 __func__, channel, source, devaddr, chan);
+
+	WARN_ON(!chan);
+	if (!chan)
+		return -EINVAL;
+
+	peripheral = (chan->peripheral & 0xf);
+	chan->source = source;
+	chan->dev_addr = devaddr;
+
+	pr_debug("%s: peripheral %d\n", __func__, peripheral);
+
+	switch (source) {
+	case S3C2410_DMASRC_HW:
+		config = 2 << PL080_CONFIG_FLOW_CONTROL_SHIFT;
+		config |= peripheral << PL080_CONFIG_SRC_SEL_SHIFT;
+		break;
+	case S3C2410_DMASRC_MEM:
+		config = 1 << PL080_CONFIG_FLOW_CONTROL_SHIFT;
+		config |= peripheral << PL080_CONFIG_DST_SEL_SHIFT;
+		break;
+	default:
+		printk(KERN_ERR "%s: bad source\n", __func__);
+		return -EINVAL;
+	}
+
+	/* allow TC and ERR interrupts */
+	config |= PL080_CONFIG_TC_IRQ_MASK;
+	config |= PL080_CONFIG_ERR_IRQ_MASK;
+
+	pr_debug("%s: config %08x\n", __func__, config);
+
+	writel(config, chan->regs + PL080S_CH_CONFIG);
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_devconfig);
+
+
+int s3c2410_dma_getposition(unsigned int channel,
+			    dma_addr_t *src, dma_addr_t *dst)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	WARN_ON(!chan);
+	if (!chan)
+		return -EINVAL;
+
+	if (src != NULL)
+		*src = readl(chan->regs + PL080_CH_SRC_ADDR);
+
+	if (dst != NULL)
+		*dst = readl(chan->regs + PL080_CH_DST_ADDR);
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_getposition);
+
+/* s3c2410_request_dma
+ *
+ * get control of an dma channel
+*/
+
+int s3c2410_dma_request(unsigned int channel,
+			struct s3c2410_dma_client *client,
+			void *dev)
+{
+	struct s3c2410_dma_chan *chan;
+	unsigned long flags;
+
+	pr_debug("dma%d: s3c2410_request_dma: client=%s, dev=%p\n",
+		 channel, client->name, dev);
+
+	local_irq_save(flags);
+
+	chan = s3c64xx_dma_map_channel(channel);
+	if (chan == NULL) {
+		local_irq_restore(flags);
+		return -EBUSY;
+	}
+
+	dbg_showchan(chan);
+
+	chan->client = client;
+	chan->in_use = 1;
+	chan->peripheral = channel;
+
+	local_irq_restore(flags);
+
+	/* need to setup */
+
+	pr_debug("%s: channel initialised, %p\n", __func__, chan);
+
+	return chan->number | DMACH_LOW_LEVEL;
+}
+
+EXPORT_SYMBOL(s3c2410_dma_request);
+
+/* s3c2410_dma_free
+ *
+ * release the given channel back to the system, will stop and flush
+ * any outstanding transfers, and ensure the channel is ready for the
+ * next claimant.
+ *
+ * Note, although a warning is currently printed if the freeing client
+ * info is not the same as the registrant's client info, the free is still
+ * allowed to go through.
+*/
+
+int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *client)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+	unsigned long flags;
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	local_irq_save(flags);
+
+	if (chan->client != client) {
+		printk(KERN_WARNING "dma%d: possible free from different client (channel %p, passed %p)\n",
+		       channel, chan->client, client);
+	}
+
+	/* sort out stopping and freeing the channel */
+
+
+	chan->client = NULL;
+	chan->in_use = 0;
+
+	if (!(channel & DMACH_LOW_LEVEL))
+		s3c_dma_chan_map[channel] = NULL;
+
+	local_irq_restore(flags);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(s3c2410_dma_free);
+
+
+static void s3c64xx_dma_tcirq(struct s3c64xx_dmac *dmac, int offs)
+{
+	struct s3c2410_dma_chan *chan = dmac->channels + offs;
+
+	/* note, we currently do not bother to work out which buffer
+	 * or buffers have been completed since the last tc-irq. */
+
+	if (chan->callback_fn)
+		(chan->callback_fn)(chan, chan->curr->pw, 0, S3C2410_RES_OK);
+}
+
+static void s3c64xx_dma_errirq(struct s3c64xx_dmac *dmac, int offs)
+{
+	printk(KERN_DEBUG "%s: offs %d\n", __func__, offs);
+}
+
+static irqreturn_t s3c64xx_dma_irq(int irq, void *pw)
+{
+	struct s3c64xx_dmac *dmac = pw;
+	u32 tcstat, errstat;
+	u32 bit;
+	int offs;
+
+	tcstat = readl(dmac->regs + PL080_TC_STATUS);
+	errstat = readl(dmac->regs + PL080_ERR_STATUS);
+
+	for (offs = 0, bit = 1; offs < 8; offs++, bit <<= 1) {
+		if (tcstat & bit) {
+			writel(bit, dmac->regs + PL080_TC_CLEAR);
+			s3c64xx_dma_tcirq(dmac, offs);
+		}
+
+		if (errstat & bit) {
+			s3c64xx_dma_errirq(dmac, offs);
+			writel(bit, dmac->regs + PL080_ERR_CLEAR);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static struct sysdev_class dma_sysclass = {
+	.name		= "s3c64xx-dma",
+};
+
+static int s3c64xx_dma_init1(int chno, enum dma_ch chbase,
+			     int irq, unsigned int base)
+{
+	struct s3c2410_dma_chan *chptr = &s3c2410_chans[chno];
+	struct s3c64xx_dmac *dmac;
+	char clkname[16];
+	void __iomem *regs;
+	void __iomem *regptr;
+	int err, ch;
+
+	dmac = kzalloc(sizeof(struct s3c64xx_dmac), GFP_KERNEL);
+	if (!dmac) {
+		printk(KERN_ERR "%s: failed to alloc mem\n", __func__);
+		return -ENOMEM;
+	}
+
+	dmac->sysdev.id = chno / 8;
+	dmac->sysdev.cls = &dma_sysclass;
+
+	err = sysdev_register(&dmac->sysdev);
+	if (err) {
+		printk(KERN_ERR "%s: failed to register sysdevice\n", __func__);
+		goto err_alloc;
+	}
+
+	regs = ioremap(base, 0x200);
+	if (!regs) {
+		printk(KERN_ERR "%s: failed to ioremap()\n", __func__);
+		err = -ENXIO;
+		goto err_dev;
+	}
+
+	snprintf(clkname, sizeof(clkname), "dma%d", dmac->sysdev.id);
+
+	dmac->clk = clk_get(NULL, clkname);
+	if (IS_ERR(dmac->clk)) {
+		printk(KERN_ERR "%s: failed to get clock %s\n", __func__, clkname);
+		err = PTR_ERR(dmac->clk);
+		goto err_map;
+	}
+
+	clk_enable(dmac->clk);
+
+	dmac->regs = regs;
+	dmac->chanbase = chbase;
+	dmac->channels = chptr;
+
+	err = request_irq(irq, s3c64xx_dma_irq, 0, "DMA", dmac);
+	if (err < 0) {
+		printk(KERN_ERR "%s: failed to get irq\n", __func__);
+		goto err_clk;
+	}
+
+	regptr = regs + PL080_Cx_BASE(0);
+
+	for (ch = 0; ch < 8; ch++, chno++, chptr++) {
+		printk(KERN_INFO "%s: registering DMA %d (%p)\n",
+		       __func__, chno, regptr);
+
+		chptr->bit = 1 << ch;
+		chptr->number = chno;
+		chptr->dmac = dmac;
+		chptr->regs = regptr;
+		regptr += PL008_Cx_STRIDE;
+	}
+
+	/* for the moment, permanently enable the controller */
+	writel(PL080_CONFIG_ENABLE, regs + PL080_CONFIG);
+
+	printk(KERN_INFO "PL080: IRQ %d, at %p\n", irq, regs);
+
+	return 0;
+
+err_clk:
+	clk_disable(dmac->clk);
+	clk_put(dmac->clk);
+err_map:
+	iounmap(regs);
+err_dev:
+	sysdev_unregister(&dmac->sysdev);
+err_alloc:
+	kfree(dmac);
+	return err;
+}
+
+static int __init s3c64xx_dma_init(void)
+{
+	int ret;
+
+	printk(KERN_INFO "%s: Registering DMA channels\n", __func__);
+
+	dma_pool = dma_pool_create("DMA-LLI", NULL, 32, 16, 0);
+	if (!dma_pool) {
+		printk(KERN_ERR "%s: failed to create pool\n", __func__);
+		return -ENOMEM;
+	}
+
+	ret = sysdev_class_register(&dma_sysclass);
+	if (ret) {
+		printk(KERN_ERR "%s: failed to create sysclass\n", __func__);
+		return -ENOMEM;
+	}
+
+	/* Set all DMA configuration to be DMA, not SDMA */
+	writel(0xffffff, S3C_SYSREG(0x110));
+
+	/* Register standard DMA controlers */
+	s3c64xx_dma_init1(0, DMACH_UART0, IRQ_DMA0, 0x75000000);
+	s3c64xx_dma_init1(8, DMACH_PCM1_TX, IRQ_DMA1, 0x75100000);
+
+	return 0;
+}
+
+arch_initcall(s3c64xx_dma_init);
diff --git a/arch/arm/plat-s3c64xx/gpiolib.c b/arch/arm/plat-s3c64xx/gpiolib.c
index 78ee52cffc9e..da7b60ee5e67 100644
--- a/arch/arm/plat-s3c64xx/gpiolib.c
+++ b/arch/arm/plat-s3c64xx/gpiolib.c
@@ -385,12 +385,19 @@ static __init void s3c64xx_gpiolib_add_4bit(struct s3c_gpio_chip *chip)
 {
 	chip->chip.direction_input = s3c64xx_gpiolib_4bit_input;
 	chip->chip.direction_output = s3c64xx_gpiolib_4bit_output;
+	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
 }
 
 static __init void s3c64xx_gpiolib_add_4bit2(struct s3c_gpio_chip *chip)
 {
 	chip->chip.direction_input = s3c64xx_gpiolib_4bit2_input;
 	chip->chip.direction_output = s3c64xx_gpiolib_4bit2_output;
+	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
+}
+
+static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip)
+{
+	chip->pm = __gpio_pm(&s3c_gpio_pm_2bit);
 }
 
 static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips,
@@ -412,7 +419,8 @@ static __init int s3c64xx_gpiolib_init(void)
 	s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2),
 			    s3c64xx_gpiolib_add_4bit2);
 
-	s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit), NULL);
+	s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit),
+			    s3c64xx_gpiolib_add_2bit);
 
 	return 0;
 }
diff --git a/arch/arm/plat-s3c64xx/include/plat/dma-plat.h b/arch/arm/plat-s3c64xx/include/plat/dma-plat.h
new file mode 100644
index 000000000000..0c30dd986725
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/include/plat/dma-plat.h
@@ -0,0 +1,70 @@
+/* linux/arch/arm/plat-s3c64xx/include/plat/dma-plat.h
+ *
+ * Copyright 2009 Openmoko, Inc.
+ * Copyright 2009 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX DMA core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
+
+struct s3c64xx_dma_buff;
+
+/** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor
+ * @next: Pointer to next buffer in queue or ring.
+ * @pw: Client provided identifier
+ * @lli: Pointer to hardware descriptor this buffer is associated with.
+ * @lli_dma: Hardare address of the descriptor.
+ */
+struct s3c64xx_dma_buff {
+	struct s3c64xx_dma_buff *next;
+
+	void			*pw;
+	struct pl080_lli	*lli;
+	dma_addr_t		 lli_dma;
+};
+
+struct s3c64xx_dmac;
+
+struct s3c2410_dma_chan {
+	unsigned char		 number;      /* number of this dma channel */
+	unsigned char		 in_use;      /* channel allocated */
+	unsigned char		 bit;	      /* bit for enable/disable/etc */
+	unsigned char		 hw_width;
+	unsigned char		 peripheral;
+
+	unsigned int		 flags;
+	enum s3c2410_dmasrc	 source;
+
+
+	dma_addr_t		dev_addr;
+
+	struct s3c2410_dma_client *client;
+	struct s3c64xx_dmac	*dmac;		/* pointer to controller */
+
+	void __iomem		*regs;
+
+	/* cdriver callbacks */
+	s3c2410_dma_cbfn_t	 callback_fn;	/* buffer done callback */
+	s3c2410_dma_opfn_t	 op_fn;		/* channel op callback */
+
+	/* buffer list and information */
+	struct s3c64xx_dma_buff	*curr;		/* current dma buffer */
+	struct s3c64xx_dma_buff	*next;		/* next buffer to load */
+	struct s3c64xx_dma_buff	*end;		/* end of queue */
+
+	/* note, when channel is running in circular mode, curr is the
+	 * first buffer enqueued, end is the last and curr is where the
+	 * last buffer-done event is set-at. The buffers are not freed
+	 * and the last buffer hardware descriptor points back to the
+	 * first.
+	 */
+};
+
+#include <plat/dma-core.h>
diff --git a/arch/arm/plat-s3c64xx/include/plat/irqs.h b/arch/arm/plat-s3c64xx/include/plat/irqs.h
index f865bf4d709e..743a70094d04 100644
--- a/arch/arm/plat-s3c64xx/include/plat/irqs.h
+++ b/arch/arm/plat-s3c64xx/include/plat/irqs.h
@@ -157,6 +157,7 @@
 
 #define S3C_EINT(x)		((x) + S3C_IRQ_EINT_BASE)
 #define IRQ_EINT(x)		S3C_EINT(x)
+#define IRQ_EINT_BIT(x)		((x) - S3C_EINT(0))
 
 /* Next the external interrupt groups. These are similar to the IRQ_EINT(x)
  * that they are sourced from the GPIO pins but with a different scheme for
diff --git a/arch/arm/plat-s3c64xx/include/plat/pm-core.h b/arch/arm/plat-s3c64xx/include/plat/pm-core.h
new file mode 100644
index 000000000000..d347de3ba0dc
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/include/plat/pm-core.h
@@ -0,0 +1,98 @@
+/* linux/arch/arm/plat-s3c64xx/include/plat/pm-core.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX - PM core support for arch/arm/plat-s3c/pm.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <plat/regs-gpio.h>
+
+static inline void s3c_pm_debug_init_uart(void)
+{
+	u32 tmp = __raw_readl(S3C_PCLK_GATE);
+
+	/* As a note, since the S3C64XX UARTs generally have multiple
+	 * clock sources, we simply enable PCLK at the moment and hope
+	 * that the resume settings for the UART are suitable for the
+	 * use with PCLK.
+	 */
+
+	tmp |= S3C_CLKCON_PCLK_UART0;
+	tmp |= S3C_CLKCON_PCLK_UART1;
+	tmp |= S3C_CLKCON_PCLK_UART2;
+	tmp |= S3C_CLKCON_PCLK_UART3;
+
+	__raw_writel(tmp, S3C_PCLK_GATE);
+	udelay(10);
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+	/* VIC should have already been taken care of */
+
+	/* clear any pending EINT0 interrupts */
+	__raw_writel(__raw_readl(S3C64XX_EINT0PEND), S3C64XX_EINT0PEND);
+}
+
+static inline void s3c_pm_arch_stop_clocks(void)
+{
+}
+
+static inline void s3c_pm_arch_show_resume_irqs(void)
+{
+}
+
+/* make these defines, we currently do not have any need to change
+ * the IRQ wake controls depending on the CPU we are running on */
+
+#define s3c_irqwake_eintallow	((1 << 28) - 1)
+#define s3c_irqwake_intallow	(0)
+
+static inline void s3c_pm_arch_update_uart(void __iomem *regs,
+					   struct pm_uart_save *save)
+{
+	u32 ucon = __raw_readl(regs + S3C2410_UCON);
+	u32 ucon_clk = ucon & S3C6400_UCON_CLKMASK;
+	u32 save_clk = save->ucon & S3C6400_UCON_CLKMASK;
+	u32 new_ucon;
+	u32 delta;
+
+	/* S3C64XX UART blocks only support level interrupts, so ensure that
+	 * when we restore unused UART blocks we force the level interrupt
+	 * settigs. */
+	save->ucon |= S3C2410_UCON_TXILEVEL | S3C2410_UCON_RXILEVEL;
+
+	/* We have a constraint on changing the clock type of the UART
+	 * between UCLKx and PCLK, so ensure that when we restore UCON
+	 * that the CLK field is correctly modified if the bootloader
+	 * has changed anything.
+	 */
+	if (ucon_clk != save_clk) {
+		new_ucon = save->ucon;
+		delta = ucon_clk ^ save_clk;
+
+		/* change from UCLKx => wrong PCLK,
+		 * either UCLK can be tested for by a bit-test
+		 * with UCLK0 */
+		if (ucon_clk & S3C6400_UCON_UCLK0 &&
+		    !(save_clk & S3C6400_UCON_UCLK0) &&
+		    delta & S3C6400_UCON_PCLK2) {
+			new_ucon &= ~S3C6400_UCON_UCLK0;
+		} else if (delta == S3C6400_UCON_PCLK2) {
+			/* as an precaution, don't change from
+			 * PCLK2 => PCLK or vice-versa */
+			new_ucon ^= S3C6400_UCON_PCLK2;
+		}
+
+		S3C_PMDBG("ucon change %04x => %04x (save=%04x)\n",
+			  ucon, new_ucon, save->ucon);
+		save->ucon = new_ucon;
+	}
+}
diff --git a/arch/arm/plat-s3c64xx/include/plat/regs-clock.h b/arch/arm/plat-s3c64xx/include/plat/regs-clock.h
index b1082c163247..52836d41e333 100644
--- a/arch/arm/plat-s3c64xx/include/plat/regs-clock.h
+++ b/arch/arm/plat-s3c64xx/include/plat/regs-clock.h
@@ -32,6 +32,7 @@
 #define S3C_HCLK_GATE		S3C_CLKREG(0x30)
 #define S3C_PCLK_GATE		S3C_CLKREG(0x34)
 #define S3C_SCLK_GATE		S3C_CLKREG(0x38)
+#define S3C_MEM0_GATE		S3C_CLKREG(0x3C)
 
 /* CLKDIV0 */
 #define S3C6400_CLKDIV0_MFC_MASK	(0xf << 28)
diff --git a/arch/arm/plat-s3c64xx/include/plat/s3c6400.h b/arch/arm/plat-s3c64xx/include/plat/s3c6400.h
index 571eaa2e54f1..11f2e1e119b0 100644
--- a/arch/arm/plat-s3c64xx/include/plat/s3c6400.h
+++ b/arch/arm/plat-s3c64xx/include/plat/s3c6400.h
@@ -15,12 +15,13 @@
 /* Common init code for S3C6400 related SoCs */
 
 extern void s3c6400_common_init_uarts(struct s3c2410_uartcfg *cfg, int no);
-extern void s3c6400_register_clocks(void);
+extern void s3c6400_register_clocks(unsigned armclk_divlimit);
 extern void s3c6400_setup_clocks(void);
 
 #ifdef CONFIG_CPU_S3C6400
 
 extern  int s3c6400_init(void);
+extern void s3c6400_init_irq(void);
 extern void s3c6400_map_io(void);
 extern void s3c6400_init_clocks(int xtal);
 
diff --git a/arch/arm/plat-s3c64xx/irq-eint.c b/arch/arm/plat-s3c64xx/irq-eint.c
index 47e5155bb13e..f81b7b818ba0 100644
--- a/arch/arm/plat-s3c64xx/irq-eint.c
+++ b/arch/arm/plat-s3c64xx/irq-eint.c
@@ -14,6 +14,7 @@
 
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
+#include <linux/sysdev.h>
 #include <linux/gpio.h>
 #include <linux/irq.h>
 #include <linux/io.h>
@@ -26,6 +27,7 @@
 
 #include <mach/map.h>
 #include <plat/cpu.h>
+#include <plat/pm.h>
 
 #define eint_offset(irq)	((irq) - IRQ_EINT(0))
 #define eint_irq_to_bit(irq)	(1 << eint_offset(irq))
@@ -134,6 +136,7 @@ static struct irq_chip s3c_irq_eint = {
 	.mask_ack	= s3c_irq_eint_maskack,
 	.ack		= s3c_irq_eint_ack,
 	.set_type	= s3c_irq_eint_set_type,
+	.set_wake	= s3c_irqext_wake,
 };
 
 /* s3c_irq_demux_eint
diff --git a/arch/arm/plat-s3c64xx/irq-pm.c b/arch/arm/plat-s3c64xx/irq-pm.c
new file mode 100644
index 000000000000..ca523b5d4c17
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/irq-pm.c
@@ -0,0 +1,111 @@
+/* arch/arm/plat-s3c64xx/irq-pm.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX - Interrupt handling Power Management
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sysdev.h>
+#include <linux/interrupt.h>
+#include <linux/serial_core.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+
+#include <plat/regs-serial.h>
+#include <plat/regs-timer.h>
+#include <plat/regs-gpio.h>
+#include <plat/cpu.h>
+#include <plat/pm.h>
+
+/* We handled all the IRQ types in this code, to save having to make several
+ * small files to handle each different type separately. Having the EINT_GRP
+ * code here shouldn't be as much bloat as the IRQ table space needed when
+ * they are enabled. The added benefit is we ensure that these registers are
+ * in the same state as we suspended.
+ */
+
+static struct sleep_save irq_save[] = {
+	SAVE_ITEM(S3C64XX_PRIORITY),
+	SAVE_ITEM(S3C64XX_EINT0CON0),
+	SAVE_ITEM(S3C64XX_EINT0CON1),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON0),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON1),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON2),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON3),
+	SAVE_ITEM(S3C64XX_EINT0MASK),
+	SAVE_ITEM(S3C64XX_TINT_CSTAT),
+};
+
+static struct irq_grp_save {
+	u32	fltcon;
+	u32	con;
+	u32	mask;
+} eint_grp_save[5];
+
+static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
+
+static int s3c64xx_irq_pm_suspend(struct sys_device *dev, pm_message_t state)
+{
+	struct irq_grp_save *grp = eint_grp_save;
+	int i;
+
+	S3C_PMDBG("%s: suspending IRQs\n", __func__);
+
+	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
+
+	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+		irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
+
+	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
+		grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
+		grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
+		grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
+	}
+
+	return 0;
+}
+
+static int s3c64xx_irq_pm_resume(struct sys_device *dev)
+{
+	struct irq_grp_save *grp = eint_grp_save;
+	int i;
+
+	S3C_PMDBG("%s: resuming IRQs\n", __func__);
+
+	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
+
+	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+		__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
+
+	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
+		__raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
+		__raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
+		__raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
+	}
+
+	S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
+	return 0;
+}
+
+static struct sysdev_driver s3c64xx_irq_driver = {
+	.suspend = s3c64xx_irq_pm_suspend,
+	.resume	 = s3c64xx_irq_pm_resume,
+};
+
+static int __init s3c64xx_irq_pm_init(void)
+{
+	return sysdev_driver_register(&s3c64xx_sysclass, &s3c64xx_irq_driver);
+}
+
+arch_initcall(s3c64xx_irq_pm_init);
+
diff --git a/arch/arm/plat-s3c64xx/irq.c b/arch/arm/plat-s3c64xx/irq.c
index f22edf7c2d2d..8dc5b6da9789 100644
--- a/arch/arm/plat-s3c64xx/irq.c
+++ b/arch/arm/plat-s3c64xx/irq.c
@@ -14,12 +14,14 @@
 
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
+#include <linux/serial_core.h>
 #include <linux/irq.h>
 #include <linux/io.h>
 
 #include <asm/hardware/vic.h>
 
 #include <mach/map.h>
+#include <plat/regs-serial.h>
 #include <plat/regs-timer.h>
 #include <plat/cpu.h>
 
@@ -135,9 +137,6 @@ static inline unsigned int s3c_irq_uart_bit(unsigned int irq)
 }
 
 /* UART interrupt registers, not worth adding to seperate include header */
-#define S3C64XX_UINTP	0x30
-#define S3C64XX_UINTSP	0x34
-#define S3C64XX_UINTM	0x38
 
 static void s3c_irq_uart_mask(unsigned int irq)
 {
@@ -233,8 +232,8 @@ void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid)
 	printk(KERN_DEBUG "%s: initialising interrupts\n", __func__);
 
 	/* initialise the pair of VICs */
-	vic_init(S3C_VA_VIC0, S3C_VIC0_BASE, vic0_valid);
-	vic_init(S3C_VA_VIC1, S3C_VIC1_BASE, vic1_valid);
+	vic_init(S3C_VA_VIC0, S3C_VIC0_BASE, vic0_valid, 0);
+	vic_init(S3C_VA_VIC1, S3C_VIC1_BASE, vic1_valid, 0);
 
 	/* add the timer sub-irqs */
 
diff --git a/arch/arm/plat-s3c64xx/pm.c b/arch/arm/plat-s3c64xx/pm.c
new file mode 100644
index 000000000000..07a6516a4f3c
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/pm.c
@@ -0,0 +1,175 @@
+/* linux/arch/arm/plat-s3c64xx/pm.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX CPU PM support.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+
+#include <plat/pm.h>
+#include <plat/regs-sys.h>
+#include <plat/regs-gpio.h>
+#include <plat/regs-clock.h>
+#include <plat/regs-syscon-power.h>
+#include <plat/regs-gpio-memport.h>
+
+#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
+#include <plat/gpio-bank-n.h>
+
+void s3c_pm_debug_smdkled(u32 set, u32 clear)
+{
+	unsigned long flags;
+	u32 reg;
+
+	local_irq_save(flags);
+	reg = __raw_readl(S3C64XX_GPNCON);
+	reg &= ~(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) |
+		 S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15));
+	reg |= S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) |
+	       S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15);
+	__raw_writel(reg, S3C64XX_GPNCON);
+
+	reg = __raw_readl(S3C64XX_GPNDAT);
+	reg &= ~(clear << 12);
+	reg |= set << 12;
+	__raw_writel(reg, S3C64XX_GPNDAT);
+
+	local_irq_restore(flags);
+}
+#endif
+
+static struct sleep_save core_save[] = {
+	SAVE_ITEM(S3C_APLL_LOCK),
+	SAVE_ITEM(S3C_MPLL_LOCK),
+	SAVE_ITEM(S3C_EPLL_LOCK),
+	SAVE_ITEM(S3C_CLK_SRC),
+	SAVE_ITEM(S3C_CLK_DIV0),
+	SAVE_ITEM(S3C_CLK_DIV1),
+	SAVE_ITEM(S3C_CLK_DIV2),
+	SAVE_ITEM(S3C_CLK_OUT),
+	SAVE_ITEM(S3C_HCLK_GATE),
+	SAVE_ITEM(S3C_PCLK_GATE),
+	SAVE_ITEM(S3C_SCLK_GATE),
+	SAVE_ITEM(S3C_MEM0_GATE),
+
+	SAVE_ITEM(S3C_EPLL_CON1),
+	SAVE_ITEM(S3C_EPLL_CON0),
+
+	SAVE_ITEM(S3C64XX_MEM0DRVCON),
+	SAVE_ITEM(S3C64XX_MEM1DRVCON),
+
+#ifndef CONFIG_CPU_FREQ
+	SAVE_ITEM(S3C_APLL_CON),
+	SAVE_ITEM(S3C_MPLL_CON),
+#endif
+};
+
+static struct sleep_save misc_save[] = {
+	SAVE_ITEM(S3C64XX_AHB_CON0),
+	SAVE_ITEM(S3C64XX_AHB_CON1),
+	SAVE_ITEM(S3C64XX_AHB_CON2),
+	
+	SAVE_ITEM(S3C64XX_SPCON),
+
+	SAVE_ITEM(S3C64XX_MEM0CONSTOP),
+	SAVE_ITEM(S3C64XX_MEM1CONSTOP),
+	SAVE_ITEM(S3C64XX_MEM0CONSLP0),
+	SAVE_ITEM(S3C64XX_MEM0CONSLP1),
+	SAVE_ITEM(S3C64XX_MEM1CONSLP),
+};
+
+void s3c_pm_configure_extint(void)
+{
+	__raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
+}
+
+void s3c_pm_restore_core(void)
+{
+	__raw_writel(0, S3C64XX_EINT_MASK);
+
+	s3c_pm_debug_smdkled(1 << 2, 0);
+
+	s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
+	s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
+}
+
+void s3c_pm_save_core(void)
+{
+	s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
+	s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
+}
+
+/* since both s3c6400 and s3c6410 share the same sleep pm calls, we
+ * put the per-cpu code in here until any new cpu comes along and changes
+ * this.
+ */
+
+#include <plat/regs-gpio.h>
+
+static void s3c64xx_cpu_suspend(void)
+{
+	unsigned long tmp;
+
+	/* set our standby method to sleep */
+
+	tmp = __raw_readl(S3C64XX_PWR_CFG);
+	tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
+	tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP;
+	__raw_writel(tmp, S3C64XX_PWR_CFG);
+
+	/* clear any old wakeup */
+
+	__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT),
+		     S3C64XX_WAKEUP_STAT);
+
+	/* set the LED state to 0110 over sleep */
+	s3c_pm_debug_smdkled(3 << 1, 0xf);
+
+	/* issue the standby signal into the pm unit. Note, we
+	 * issue a write-buffer drain just in case */
+
+	tmp = 0;
+
+	asm("b 1f\n\t"
+	    ".align 5\n\t"
+	    "1:\n\t"
+	    "mcr p15, 0, %0, c7, c10, 5\n\t"
+	    "mcr p15, 0, %0, c7, c10, 4\n\t"
+	    "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
+
+	/* we should never get past here */
+
+	panic("sleep resumed to originator?");
+}
+
+static void s3c64xx_pm_prepare(void)
+{
+	/* store address of resume. */
+	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
+
+	/* ensure previous wakeup state is cleared before sleeping */
+	__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);
+}
+
+static int s3c64xx_pm_init(void)
+{
+	pm_cpu_prep = s3c64xx_pm_prepare;
+	pm_cpu_sleep = s3c64xx_cpu_suspend;
+	pm_uart_udivslot = 1;
+	return 0;
+}
+
+arch_initcall(s3c64xx_pm_init);
diff --git a/arch/arm/plat-s3c64xx/s3c6400-clock.c b/arch/arm/plat-s3c64xx/s3c6400-clock.c
index 05b17528041e..1debc1f9f987 100644
--- a/arch/arm/plat-s3c64xx/s3c6400-clock.c
+++ b/arch/arm/plat-s3c64xx/s3c6400-clock.c
@@ -133,6 +133,65 @@ static struct clksrc_clk clk_mout_mpll = {
 	.sources	= &clk_src_mpll,
 };
 
+static unsigned int armclk_mask;
+
+static unsigned long s3c64xx_clk_arm_get_rate(struct clk *clk)
+{
+	unsigned long rate = clk_get_rate(clk->parent);
+	u32 clkdiv;
+
+	/* divisor mask starts at bit0, so no need to shift */
+	clkdiv = __raw_readl(S3C_CLK_DIV0) & armclk_mask;
+
+	return rate / (clkdiv + 1);
+}
+
+static unsigned long s3c64xx_clk_arm_round_rate(struct clk *clk,
+						unsigned long rate)
+{
+	unsigned long parent = clk_get_rate(clk->parent);
+	u32 div;
+
+	if (parent < rate)
+		return rate;
+
+	div = (parent / rate) - 1;
+	if (div > armclk_mask)
+		div = armclk_mask;
+
+	return parent / (div + 1);
+}
+
+static int s3c64xx_clk_arm_set_rate(struct clk *clk, unsigned long rate)
+{
+	unsigned long parent = clk_get_rate(clk->parent);
+	u32 div;
+	u32 val;
+
+	if (rate < parent / (armclk_mask + 1))
+		return -EINVAL;
+
+	rate = clk_round_rate(clk, rate);
+	div = clk_get_rate(clk->parent) / rate;
+
+	val = __raw_readl(S3C_CLK_DIV0);
+	val &= armclk_mask;
+	val |= (div - 1);
+	__raw_writel(val, S3C_CLK_DIV0);
+
+	return 0;
+
+}
+
+static struct clk clk_arm = {
+	.name		= "armclk",
+	.id		= -1,
+	.parent		= &clk_mout_apll.clk,
+	.get_rate	= s3c64xx_clk_arm_get_rate,
+	.set_rate	= s3c64xx_clk_arm_set_rate,
+	.round_rate	= s3c64xx_clk_arm_round_rate,
+};
+
 static unsigned long s3c64xx_clk_doutmpll_get_rate(struct clk *clk)
 {
 	unsigned long rate = clk_get_rate(clk->parent);
@@ -520,6 +579,33 @@ static struct clksrc_clk clk_irda = {
 	.reg_divider	= S3C_CLK_DIV2,
 };
 
+static struct clk *clkset_camif_list[] = {
+	&clk_h2,
+};
+
+static struct clk_sources clkset_camif = {
+	.sources	= clkset_camif_list,
+	.nr_sources	= ARRAY_SIZE(clkset_camif_list),
+};
+
+static struct clksrc_clk clk_camif = {
+	.clk	= {
+		.name		= "camera",
+		.id		= -1,
+		.ctrlbit        = S3C_CLKCON_SCLK_CAM,
+		.enable		= s3c64xx_sclk_ctrl,
+		.set_parent	= s3c64xx_setparent_clksrc,
+		.get_rate	= s3c64xx_getrate_clksrc,
+		.set_rate	= s3c64xx_setrate_clksrc,
+		.round_rate	= s3c64xx_roundrate_clksrc,
+	},
+	.shift		= 0,
+	.mask		= 0,
+	.sources	= &clkset_camif,
+	.divider_shift	= S3C6400_CLKDIV0_CAM_SHIFT,
+	.reg_divider	= S3C_CLK_DIV0,
+};
+
 /* Clock initialisation code */
 
 static struct clksrc_clk *init_parents[] = {
@@ -536,6 +622,7 @@ static struct clksrc_clk *init_parents[] = {
 	&clk_audio0,
 	&clk_audio1,
 	&clk_irda,
+	&clk_camif,
 };
 
 static void __init_or_cpufreq s3c6400_set_clksrc(struct clksrc_clk *clk)
@@ -608,6 +695,7 @@ void __init_or_cpufreq s3c6400_setup_clocks(void)
 	clk_fout_epll.rate = epll;
 	clk_fout_apll.rate = apll;
 
+	clk_h2.rate = hclk2;
 	clk_h.rate = hclk;
 	clk_p.rate = pclk;
 	clk_f.rate = fclk;
@@ -635,14 +723,30 @@ static struct clk *clks[] __initdata = {
 	&clk_audio0.clk,
 	&clk_audio1.clk,
 	&clk_irda.clk,
+	&clk_camif.clk,
+	&clk_arm,
 };
 
-void __init s3c6400_register_clocks(void)
+/**
+ * s3c6400_register_clocks - register clocks for s3c6400 and above
+ * @armclk_divlimit: Divisor mask for ARMCLK
+ *
+ * Register the clocks for the S3C6400 and above SoC range, such
+ * as ARMCLK and the clocks which have divider chains attached.
+ *
+ * This call does not setup the clocks, which is left to the
+ * s3c6400_setup_clocks() call which may be needed by the cpufreq
+ * or resume code to re-set the clocks if the bootloader has changed
+ * them.
+ */
+void __init s3c6400_register_clocks(unsigned armclk_divlimit)
 {
 	struct clk *clkp;
 	int ret;
 	int ptr;
 
+	armclk_mask = armclk_divlimit;
+
 	for (ptr = 0; ptr < ARRAY_SIZE(clks); ptr++) {
 		clkp = clks[ptr];
 		ret = s3c24xx_register_clock(clkp);
diff --git a/arch/arm/plat-s3c64xx/setup-sdhci-gpio.c b/arch/arm/plat-s3c64xx/setup-sdhci-gpio.c
new file mode 100644
index 000000000000..5417123b0ac1
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/setup-sdhci-gpio.c
@@ -0,0 +1,55 @@
+/* linux/arch/arm/plat-s3c64xx/setup-sdhci-gpio.c
+ *
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-cfg.h>
+
+void s3c64xx_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+	unsigned int gpio;
+	unsigned int end;
+
+	end = S3C64XX_GPG(2 + width);
+
+	/* Set all the necessary GPG pins to special-function 0 */
+	for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));
+}
+
+void s3c64xx_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+	unsigned int gpio;
+	unsigned int end;
+
+	end = S3C64XX_GPH(2 + width);
+
+	/* Set all the necessary GPG pins to special-function 0 */
+	for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) {
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+	}
+
+	s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));
+}
diff --git a/arch/arm/plat-s3c64xx/sleep.S b/arch/arm/plat-s3c64xx/sleep.S
new file mode 100644
index 000000000000..8e71fe90a373
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/sleep.S
@@ -0,0 +1,144 @@
+/* linux/0arch/arm/plat-s3c64xx/sleep.S
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX CPU sleep code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <mach/map.h>
+
+#undef S3C64XX_VA_GPIO
+#define S3C64XX_VA_GPIO (0x0)
+
+#include <plat/regs-gpio.h>
+#include <plat/gpio-bank-n.h>
+
+#define LL_UART (S3C_PA_UART + (0x400 * CONFIG_S3C_LOWLEVEL_UART_PORT))
+
+	.text
+
+	/* s3c_cpu_save
+	 *
+	 * Save enough processor state to allow the restart of the pm.c
+	 * code after resume.
+	 *
+	 * entry:
+	 *	r0 = pointer to the save block
+	*/
+
+ENTRY(s3c_cpu_save)
+	stmfd	sp!, { r4 - r12, lr }
+
+	mrc	p15, 0, r4, c13, c0, 0	@ FCSE/PID
+	mrc	p15, 0, r5, c3, c0, 0	@ Domain ID
+	mrc	p15, 0, r6, c2, c0, 0	@ Translation Table BASE0
+	mrc	p15, 0, r7, c2, c0, 1	@ Translation Table BASE1
+	mrc	p15, 0, r8, c2, c0, 2	@ Translation Table Control
+	mrc	p15, 0, r9, c1, c0, 0	@ Control register
+	mrc	p15, 0, r10, c1, c0, 1	@ Auxiliary control register
+	mrc	p15, 0, r11, c1, c0, 2	@ Co-processor access controls
+
+	stmia	r0, { r4 - r13 }	@ Save CP registers and SP
+
+	@@ save our state to ram
+	bl	s3c_pm_cb_flushcache
+
+	@@ call final suspend code
+	ldr	r0, =pm_cpu_sleep
+	ldr	pc, [r0]
+	
+	@@ return to the caller, after the MMU is turned on.
+	@@ restore the last bits of the stack and return.
+resume_with_mmu:
+	ldmfd	sp!, { r4 - r12, pc }	@ return, from sp from s3c_cpu_save
+
+	.data
+
+	/* the next bit is code, but it requires easy access to the
+	 * s3c_sleep_save_phys data before the MMU is switched on, so
+	 * we store the code that needs this variable in the .data where
+	 * the value can be written to (the .text segment is RO).
+	*/
+
+	.global	s3c_sleep_save_phys
+s3c_sleep_save_phys:
+	.word	0
+
+	/* Sleep magic, the word before the resume entry point so that the
+	 * bootloader can check for a resumeable image. */
+
+	.word	0x2bedf00d
+
+	/* s3c_cpu_reusme
+	 *
+	 * This is the entry point, stored by whatever method the bootloader
+	 * requires to get the kernel runnign again. This code expects to be
+	 * entered with no caches live and the MMU disabled. It will then
+	 * restore the MMU and other basic CP registers saved and restart
+	 * the kernel C code to finish the resume code.
+	*/
+
+ENTRY(s3c_cpu_resume)
+	msr	cpsr_c, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
+	ldr	r2, =LL_UART		/* for debug */
+
+#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
+	/* Initialise the GPIO state if we are debugging via the SMDK LEDs,
+	 * as the uboot version supplied resets these to inputs during the
+	 * resume checks.
+	*/
+
+	ldr	r3, =S3C64XX_PA_GPIO
+	ldr	r0, [ r3, #S3C64XX_GPNCON ]
+	bic	r0, r0, #(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) | \
+			  S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15))
+	orr	r0, r0, #(S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) | \
+			  S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15))
+	str	r0, [ r3, #S3C64XX_GPNCON ]
+
+	ldr	r0, [ r3, #S3C64XX_GPNDAT ]
+	bic	r0, r0, #0xf << 12			@ GPN12..15
+	orr	r0, r0, #1 << 15			@ GPN15
+	str	r0, [ r3, #S3C64XX_GPNDAT ]
+#endif
+
+	/* __v6_setup from arch/arm/mm/proc-v6.S, ensure that the caches
+	 * are thoroughly cleaned just in case the bootloader didn't do it
+	 * for us. */
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c14, 0		@ clean+invalidate D cache
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mcr	p15, 0, r0, c7, c15, 0		@ clean+invalidate cache
+	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
+	@@mcr	p15, 0, r0, c8, c7, 0		@ invalidate I + D TLBs
+	@@mcr	p15, 0, r0, c7, c7, 0		@ Invalidate I + D caches
+
+	ldr	r0, s3c_sleep_save_phys
+	ldmia	r0, { r4 - r13 }
+
+	mcr	p15, 0, r4, c13, c0, 0	@ FCSE/PID
+	mcr	p15, 0, r5, c3, c0, 0	@ Domain ID
+	mcr	p15, 0, r6, c2, c0, 0	@ Translation Table BASE0
+	mcr	p15, 0, r7, c2, c0, 1	@ Translation Table BASE1
+	mcr	p15, 0, r8, c2, c0, 2	@ Translation Table Control
+	mcr	p15, 0, r10, c1, c0, 1	@ Auxiliary control register
+
+	mov	r0, #0			@ restore copro access controls
+	mcr	p15, 0, r11, c1, c0, 2	@ Co-processor access controls
+	mcr 	p15, 0, r0, c7, c5, 4
+
+	ldr	r2, =resume_with_mmu
+	mcr	p15, 0, r9, c1, c0, 0		/* turn mmu back on */
+	nop
+	mov	pc, r2				/* jump back */
+
+	.end