Merge branch 'devel-dma' into omap-for-linus

arch/arm/mach-omap1/Makefile

@@ -3,7 +3,7 @@
 #
 
 # Common support
-obj-y := io.o id.o sram.o irq.o mux.o flash.o serial.o devices.o
+obj-y := io.o id.o sram.o irq.o mux.o flash.o serial.o devices.o dma.o
 obj-y += clock.o clock_data.o opp_data.o
 
 obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o

arch/arm/mach-omap1/dma.c

@@ -0,0 +1,390 @@
+/*
+ * OMAP1/OMAP7xx - specific DMA driver
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@nokia.com>
+ * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
+ * Graphics DMA and LCD DMA graphics tranformations
+ * by Imre Deak <imre.deak@nokia.com>
+ * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
+ * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Converted DMA library into platform driver
+ *                   - G, Manjunath Kondaiah <manjugk@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <plat/dma.h>
+#include <plat/tc.h>
+#include <plat/irqs.h>
+
+#define OMAP1_DMA_BASE			(0xfffed800)
+#define OMAP1_LOGICAL_DMA_CH_COUNT	17
+#define OMAP1_DMA_STRIDE		0x40
+
+static u32 errata;
+static u32 enable_1510_mode;
+static u8 dma_stride;
+static enum omap_reg_offsets dma_common_ch_start, dma_common_ch_end;
+
+static u16 reg_map[] = {
+	[GCR]		= 0x400,
+	[GSCR]		= 0x404,
+	[GRST1]		= 0x408,
+	[HW_ID]		= 0x442,
+	[PCH2_ID]	= 0x444,
+	[PCH0_ID]	= 0x446,
+	[PCH1_ID]	= 0x448,
+	[PCHG_ID]	= 0x44a,
+	[PCHD_ID]	= 0x44c,
+	[CAPS_0]	= 0x44e,
+	[CAPS_1]	= 0x452,
+	[CAPS_2]	= 0x456,
+	[CAPS_3]	= 0x458,
+	[CAPS_4]	= 0x45a,
+	[PCH2_SR]	= 0x460,
+	[PCH0_SR]	= 0x480,
+	[PCH1_SR]	= 0x482,
+	[PCHD_SR]	= 0x4c0,
+
+	/* Common Registers */
+	[CSDP]		= 0x00,
+	[CCR]		= 0x02,
+	[CICR]		= 0x04,
+	[CSR]		= 0x06,
+	[CEN]		= 0x10,
+	[CFN]		= 0x12,
+	[CSFI]		= 0x14,
+	[CSEI]		= 0x16,
+	[CPC]		= 0x18,	/* 15xx only */
+	[CSAC]		= 0x18,
+	[CDAC]		= 0x1a,
+	[CDEI]		= 0x1c,
+	[CDFI]		= 0x1e,
+	[CLNK_CTRL]	= 0x28,
+
+	/* Channel specific register offsets */
+	[CSSA]		= 0x08,
+	[CDSA]		= 0x0c,
+	[COLOR]		= 0x20,
+	[CCR2]		= 0x24,
+	[LCH_CTRL]	= 0x2a,
+};
+
+static struct resource res[] __initdata = {
+	[0] = {
+		.start	= OMAP1_DMA_BASE,
+		.end	= OMAP1_DMA_BASE + SZ_2K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.name   = "0",
+		.start  = INT_DMA_CH0_6,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[2] = {
+		.name   = "1",
+		.start  = INT_DMA_CH1_7,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[3] = {
+		.name   = "2",
+		.start  = INT_DMA_CH2_8,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[4] = {
+		.name   = "3",
+		.start  = INT_DMA_CH3,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[5] = {
+		.name   = "4",
+		.start  = INT_DMA_CH4,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[6] = {
+		.name   = "5",
+		.start  = INT_DMA_CH5,
+		.flags  = IORESOURCE_IRQ,
+	},
+	/* Handled in lcd_dma.c */
+	[7] = {
+		.name   = "6",
+		.start  = INT_1610_DMA_CH6,
+		.flags  = IORESOURCE_IRQ,
+	},
+	/* irq's for omap16xx and omap7xx */
+	[8] = {
+		.name   = "7",
+		.start  = INT_1610_DMA_CH7,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[9] = {
+		.name   = "8",
+		.start  = INT_1610_DMA_CH8,
+		.flags  = IORESOURCE_IRQ,
+	},
+	[10] = {
+		.name  = "9",
+		.start = INT_1610_DMA_CH9,
+		.flags = IORESOURCE_IRQ,
+	},
+	[11] = {
+		.name  = "10",
+		.start = INT_1610_DMA_CH10,
+		.flags = IORESOURCE_IRQ,
+	},
+	[12] = {
+		.name  = "11",
+		.start = INT_1610_DMA_CH11,
+		.flags = IORESOURCE_IRQ,
+	},
+	[13] = {
+		.name  = "12",
+		.start = INT_1610_DMA_CH12,
+		.flags = IORESOURCE_IRQ,
+	},
+	[14] = {
+		.name  = "13",
+		.start = INT_1610_DMA_CH13,
+		.flags = IORESOURCE_IRQ,
+	},
+	[15] = {
+		.name  = "14",
+		.start = INT_1610_DMA_CH14,
+		.flags = IORESOURCE_IRQ,
+	},
+	[16] = {
+		.name  = "15",
+		.start = INT_1610_DMA_CH15,
+		.flags = IORESOURCE_IRQ,
+	},
+	[17] = {
+		.name  = "16",
+		.start = INT_DMA_LCD,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static void __iomem *dma_base;
+static inline void dma_write(u32 val, int reg, int lch)
+{
+	u8  stride;
+	u32 offset;
+
+	stride = (reg >= dma_common_ch_start) ? dma_stride : 0;
+	offset = reg_map[reg] + (stride * lch);
+
+	__raw_writew(val, dma_base + offset);
+	if ((reg > CLNK_CTRL && reg < CCEN) ||
+			(reg > PCHD_ID && reg < CAPS_2)) {
+		u32 offset2 = reg_map[reg] + 2 + (stride * lch);
+		__raw_writew(val >> 16, dma_base + offset2);
+	}
+}
+
+static inline u32 dma_read(int reg, int lch)
+{
+	u8 stride;
+	u32 offset, val;
+
+	stride = (reg >= dma_common_ch_start) ? dma_stride : 0;
+	offset = reg_map[reg] + (stride * lch);
+
+	val = __raw_readw(dma_base + offset);
+	if ((reg > CLNK_CTRL && reg < CCEN) ||
+			(reg > PCHD_ID && reg < CAPS_2)) {
+		u16 upper;
+		u32 offset2 = reg_map[reg] + 2 + (stride * lch);
+		upper = __raw_readw(dma_base + offset2);
+		val |= (upper << 16);
+	}
+	return val;
+}
+
+static void omap1_clear_lch_regs(int lch)
+{
+	int i = dma_common_ch_start;
+
+	for (; i <= dma_common_ch_end; i += 1)
+		dma_write(0, i, lch);
+}
+
+static void omap1_clear_dma(int lch)
+{
+	u32 l;
+
+	l = dma_read(CCR, lch);
+	l &= ~OMAP_DMA_CCR_EN;
+	dma_write(l, CCR, lch);
+
+	/* Clear pending interrupts */
+	l = dma_read(CSR, lch);
+}
+
+static void omap1_show_dma_caps(void)
+{
+	if (enable_1510_mode) {
+		printk(KERN_INFO "DMA support for OMAP15xx initialized\n");
+	} else {
+		u16 w;
+		printk(KERN_INFO "OMAP DMA hardware version %d\n",
+							dma_read(HW_ID, 0));
+		printk(KERN_INFO "DMA capabilities: %08x:%08x:%04x:%04x:%04x\n",
+			dma_read(CAPS_0, 0), dma_read(CAPS_1, 0),
+			dma_read(CAPS_2, 0), dma_read(CAPS_3, 0),
+			dma_read(CAPS_4, 0));
+
+		/* Disable OMAP 3.0/3.1 compatibility mode. */
+		w = dma_read(GSCR, 0);
+		w |= 1 << 3;
+		dma_write(w, GSCR, 0);
+	}
+	return;
+}
+
+static u32 configure_dma_errata(void)
+{
+
+	/*
+	 * Erratum 3.2/3.3: sometimes 0 is returned if CSAC/CDAC is
+	 * read before the DMA controller finished disabling the channel.
+	 */
+	if (!cpu_is_omap15xx())
+		SET_DMA_ERRATA(DMA_ERRATA_3_3);
+
+	return errata;
+}
+
+static int __init omap1_system_dma_init(void)
+{
+	struct omap_system_dma_plat_info	*p;
+	struct omap_dma_dev_attr		*d;
+	struct platform_device			*pdev;
+	int ret;
+
+	pdev = platform_device_alloc("omap_dma_system", 0);
+	if (!pdev) {
+		pr_err("%s: Unable to device alloc for dma\n",
+			__func__);
+		return -ENOMEM;
+	}
+
+	dma_base = ioremap(res[0].start, resource_size(&res[0]));
+	if (!dma_base) {
+		pr_err("%s: Unable to ioremap\n", __func__);
+		return -ENODEV;
+	}
+
+	ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+	if (ret) {
+		dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
+			__func__, pdev->name, pdev->id);
+		goto exit_device_del;
+	}
+
+	p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
+	if (!p) {
+		dev_err(&pdev->dev, "%s: Unable to allocate 'p' for %s\n",
+			__func__, pdev->name);
+		ret = -ENOMEM;
+		goto exit_device_put;
+	}
+
+	d = kzalloc(sizeof(struct omap_dma_dev_attr), GFP_KERNEL);
+	if (!d) {
+		dev_err(&pdev->dev, "%s: Unable to allocate 'd' for %s\n",
+			__func__, pdev->name);
+		ret = -ENOMEM;
+		goto exit_release_p;
+	}
+
+	d->lch_count		= OMAP1_LOGICAL_DMA_CH_COUNT;
+
+	/* Valid attributes for omap1 plus processors */
+	if (cpu_is_omap15xx())
+		d->dev_caps = ENABLE_1510_MODE;
+	enable_1510_mode = d->dev_caps & ENABLE_1510_MODE;
+
+	d->dev_caps		|= SRC_PORT;
+	d->dev_caps		|= DST_PORT;
+	d->dev_caps		|= SRC_INDEX;
+	d->dev_caps		|= DST_INDEX;
+	d->dev_caps		|= IS_BURST_ONLY4;
+	d->dev_caps		|= CLEAR_CSR_ON_READ;
+	d->dev_caps		|= IS_WORD_16;
+
+
+	d->chan = kzalloc(sizeof(struct omap_dma_lch) *
+					(d->lch_count), GFP_KERNEL);
+	if (!d->chan) {
+		dev_err(&pdev->dev, "%s: Memory allocation failed"
+					"for d->chan!!!\n", __func__);
+		goto exit_release_d;
+	}
+
+	if (cpu_is_omap15xx())
+		d->chan_count = 9;
+	else if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
+		if (!(d->dev_caps & ENABLE_1510_MODE))
+			d->chan_count = 16;
+		else
+			d->chan_count = 9;
+	}
+
+	p->dma_attr = d;
+
+	p->show_dma_caps	= omap1_show_dma_caps;
+	p->clear_lch_regs	= omap1_clear_lch_regs;
+	p->clear_dma		= omap1_clear_dma;
+	p->dma_write		= dma_write;
+	p->dma_read		= dma_read;
+	p->disable_irq_lch	= NULL;
+
+	p->errata = configure_dma_errata();
+
+	ret = platform_device_add_data(pdev, p, sizeof(*p));
+	if (ret) {
+		dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
+			__func__, pdev->name, pdev->id);
+		goto exit_release_chan;
+	}
+
+	ret = platform_device_add(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
+			__func__, pdev->name, pdev->id);
+		goto exit_release_chan;
+	}
+
+	dma_stride		= OMAP1_DMA_STRIDE;
+	dma_common_ch_start	= CPC;
+	dma_common_ch_end	= COLOR;
+
+	return ret;
+
+exit_release_chan:
+	kfree(d->chan);
+exit_release_d:
+	kfree(d);
+exit_release_p:
+	kfree(p);
+exit_device_put:
+	platform_device_put(pdev);
+exit_device_del:
+	platform_device_del(pdev);
+
+	return ret;
+}
+arch_initcall(omap1_system_dma_init);

arch/arm/mach-omap2/Makefile

@@ -4,7 +4,7 @@
 
 # Common support
 obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer-gp.o pm.o \
-	 common.o gpio.o
+	 common.o gpio.o dma.o
 
 omap-2-3-common				= irq.o sdrc.o prm2xxx_3xxx.o
 hwmod-common				= omap_hwmod.o \

arch/arm/mach-omap2/dma.c

@@ -0,0 +1,297 @@
+/*
+ * OMAP2+ DMA driver
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@nokia.com>
+ * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
+ * Graphics DMA and LCD DMA graphics tranformations
+ * by Imre Deak <imre.deak@nokia.com>
+ * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
+ * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Converted DMA library into platform driver
+ *	- G, Manjunath Kondaiah <manjugk@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
+#include <plat/dma.h>
+
+#define OMAP2_DMA_STRIDE	0x60
+
+static u32 errata;
+static u8 dma_stride;
+
+static struct omap_dma_dev_attr *d;
+
+static enum omap_reg_offsets dma_common_ch_start, dma_common_ch_end;
+
+static u16 reg_map[] = {
+	[REVISION]		= 0x00,
+	[GCR]			= 0x78,
+	[IRQSTATUS_L0]		= 0x08,
+	[IRQSTATUS_L1]		= 0x0c,
+	[IRQSTATUS_L2]		= 0x10,
+	[IRQSTATUS_L3]		= 0x14,
+	[IRQENABLE_L0]		= 0x18,
+	[IRQENABLE_L1]		= 0x1c,
+	[IRQENABLE_L2]		= 0x20,
+	[IRQENABLE_L3]		= 0x24,
+	[SYSSTATUS]		= 0x28,
+	[OCP_SYSCONFIG]		= 0x2c,
+	[CAPS_0]		= 0x64,
+	[CAPS_2]		= 0x6c,
+	[CAPS_3]		= 0x70,
+	[CAPS_4]		= 0x74,
+
+	/* Common register offsets */
+	[CCR]			= 0x80,
+	[CLNK_CTRL]		= 0x84,
+	[CICR]			= 0x88,
+	[CSR]			= 0x8c,
+	[CSDP]			= 0x90,
+	[CEN]			= 0x94,
+	[CFN]			= 0x98,
+	[CSEI]			= 0xa4,
+	[CSFI]			= 0xa8,
+	[CDEI]			= 0xac,
+	[CDFI]			= 0xb0,
+	[CSAC]			= 0xb4,
+	[CDAC]			= 0xb8,
+
+	/* Channel specific register offsets */
+	[CSSA]			= 0x9c,
+	[CDSA]			= 0xa0,
+	[CCEN]			= 0xbc,
+	[CCFN]			= 0xc0,
+	[COLOR]			= 0xc4,
+
+	/* OMAP4 specific registers */
+	[CDP]			= 0xd0,
+	[CNDP]			= 0xd4,
+	[CCDN]			= 0xd8,
+};
+
+static struct omap_device_pm_latency omap2_dma_latency[] = {
+	{
+		.deactivate_func = omap_device_idle_hwmods,
+		.activate_func	 = omap_device_enable_hwmods,
+		.flags		 = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+	},
+};
+
+static void __iomem *dma_base;
+static inline void dma_write(u32 val, int reg, int lch)
+{
+	u8  stride;
+	u32 offset;
+
+	stride = (reg >= dma_common_ch_start) ? dma_stride : 0;
+	offset = reg_map[reg] + (stride * lch);
+	__raw_writel(val, dma_base + offset);
+}
+
+static inline u32 dma_read(int reg, int lch)
+{
+	u8 stride;
+	u32 offset, val;
+
+	stride = (reg >= dma_common_ch_start) ? dma_stride : 0;
+	offset = reg_map[reg] + (stride * lch);
+	val = __raw_readl(dma_base + offset);
+	return val;
+}
+
+static inline void omap2_disable_irq_lch(int lch)
+{
+	u32 val;
+
+	val = dma_read(IRQENABLE_L0, lch);
+	val &= ~(1 << lch);
+	dma_write(val, IRQENABLE_L0, lch);
+}
+
+static void omap2_clear_dma(int lch)
+{
+	int i = dma_common_ch_start;
+
+	for (; i <= dma_common_ch_end; i += 1)
+		dma_write(0, i, lch);
+}
+
+static void omap2_show_dma_caps(void)
+{
+	u8 revision = dma_read(REVISION, 0) & 0xff;
+	printk(KERN_INFO "OMAP DMA hardware revision %d.%d\n",
+				revision >> 4, revision & 0xf);
+	return;
+}
+
+static u32 configure_dma_errata(void)
+{
+
+	/*
+	 * Errata applicable for OMAP2430ES1.0 and all omap2420
+	 *
+	 * I.
+	 * Erratum ID: Not Available
+	 * Inter Frame DMA buffering issue DMA will wrongly
+	 * buffer elements if packing and bursting is enabled. This might
+	 * result in data gets stalled in FIFO at the end of the block.
+	 * Workaround: DMA channels must have BUFFERING_DISABLED bit set to
+	 * guarantee no data will stay in the DMA FIFO in case inter frame
+	 * buffering occurs
+	 *
+	 * II.
+	 * Erratum ID: Not Available
+	 * DMA may hang when several channels are used in parallel
+	 * In the following configuration, DMA channel hanging can occur:
+	 * a. Channel i, hardware synchronized, is enabled
+	 * b. Another channel (Channel x), software synchronized, is enabled.
+	 * c. Channel i is disabled before end of transfer
+	 * d. Channel i is reenabled.
+	 * e. Steps 1 to 4 are repeated a certain number of times.
+	 * f. A third channel (Channel y), software synchronized, is enabled.
+	 * Channel x and Channel y may hang immediately after step 'f'.
+	 * Workaround:
+	 * For any channel used - make sure NextLCH_ID is set to the value j.
+	 */
+	if (cpu_is_omap2420() || (cpu_is_omap2430() &&
+				(omap_type() == OMAP2430_REV_ES1_0))) {
+
+		SET_DMA_ERRATA(DMA_ERRATA_IFRAME_BUFFERING);
+		SET_DMA_ERRATA(DMA_ERRATA_PARALLEL_CHANNELS);
+	}
+
+	/*
+	 * Erratum ID: i378: OMAP2+: sDMA Channel is not disabled
+	 * after a transaction error.
+	 * Workaround: SW should explicitely disable the channel.
+	 */
+	if (cpu_class_is_omap2())
+		SET_DMA_ERRATA(DMA_ERRATA_i378);
+
+	/*
+	 * Erratum ID: i541: sDMA FIFO draining does not finish
+	 * If sDMA channel is disabled on the fly, sDMA enters standby even
+	 * through FIFO Drain is still in progress
+	 * Workaround: Put sDMA in NoStandby more before a logical channel is
+	 * disabled, then put it back to SmartStandby right after the channel
+	 * finishes FIFO draining.
+	 */
+	if (cpu_is_omap34xx())
+		SET_DMA_ERRATA(DMA_ERRATA_i541);
+
+	/*
+	 * Erratum ID: i88 : Special programming model needed to disable DMA
+	 * before end of block.
+	 * Workaround: software must ensure that the DMA is configured in No
+	 * Standby mode(DMAx_OCP_SYSCONFIG.MIDLEMODE = "01")
+	 */
+	if (omap_type() == OMAP3430_REV_ES1_0)
+		SET_DMA_ERRATA(DMA_ERRATA_i88);
+
+	/*
+	 * Erratum 3.2/3.3: sometimes 0 is returned if CSAC/CDAC is
+	 * read before the DMA controller finished disabling the channel.
+	 */
+	SET_DMA_ERRATA(DMA_ERRATA_3_3);
+
+	/*
+	 * Erratum ID: Not Available
+	 * A bug in ROM code leaves IRQ status for channels 0 and 1 uncleared
+	 * after secure sram context save and restore.
+	 * Work around: Hence we need to manually clear those IRQs to avoid
+	 * spurious interrupts. This affects only secure devices.
+	 */
+	if (cpu_is_omap34xx() && (omap_type() != OMAP2_DEVICE_TYPE_GP))
+		SET_DMA_ERRATA(DMA_ROMCODE_BUG);
+
+	return errata;
+}
+
+/* One time initializations */
+static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
+{
+	struct omap_device			*od;
+	struct omap_system_dma_plat_info	*p;
+	struct resource				*mem;
+	char					*name = "omap_dma_system";
+
+	dma_stride		= OMAP2_DMA_STRIDE;
+	dma_common_ch_start	= CSDP;
+	if (cpu_is_omap3630() || cpu_is_omap4430())
+		dma_common_ch_end = CCDN;
+	else
+		dma_common_ch_end = CCFN;
+
+	p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
+	if (!p) {
+		pr_err("%s: Unable to allocate pdata for %s:%s\n",
+			__func__, name, oh->name);
+		return -ENOMEM;
+	}
+
+	p->dma_attr		= (struct omap_dma_dev_attr *)oh->dev_attr;
+	p->disable_irq_lch	= omap2_disable_irq_lch;
+	p->show_dma_caps	= omap2_show_dma_caps;
+	p->clear_dma		= omap2_clear_dma;
+	p->dma_write		= dma_write;
+	p->dma_read		= dma_read;
+
+	p->clear_lch_regs	= NULL;
+
+	p->errata		= configure_dma_errata();
+
+	od = omap_device_build(name, 0, oh, p, sizeof(*p),
+			omap2_dma_latency, ARRAY_SIZE(omap2_dma_latency), 0);
+	kfree(p);
+	if (IS_ERR(od)) {
+		pr_err("%s: Cant build omap_device for %s:%s.\n",
+			__func__, name, oh->name);
+		return IS_ERR(od);
+	}
+
+	mem = platform_get_resource(&od->pdev, IORESOURCE_MEM, 0);
+	if (!mem) {
+		dev_err(&od->pdev.dev, "%s: no mem resource\n", __func__);
+		return -EINVAL;
+	}
+	dma_base = ioremap(mem->start, resource_size(mem));
+	if (!dma_base) {
+		dev_err(&od->pdev.dev, "%s: ioremap fail\n", __func__);
+		return -ENOMEM;
+	}
+
+	d = oh->dev_attr;
+	d->chan = kzalloc(sizeof(struct omap_dma_lch) *
+					(d->lch_count), GFP_KERNEL);
+
+	if (!d->chan) {
+		dev_err(&od->pdev.dev, "%s: kzalloc fail\n", __func__);
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static int __init omap2_system_dma_init(void)
+{
+	return omap_hwmod_for_each_by_class("dma",
+			omap2_system_dma_init_dev, NULL);
+}
+arch_initcall(omap2_system_dma_init);

arch/arm/mach-omap2/omap_hwmod_2420_data.c

@@ -42,6 +42,7 @@ static struct omap_hwmod omap2420_gpio1_hwmod;
 static struct omap_hwmod omap2420_gpio2_hwmod;
 static struct omap_hwmod omap2420_gpio3_hwmod;
 static struct omap_hwmod omap2420_gpio4_hwmod;
+static struct omap_hwmod omap2420_dma_system_hwmod;
 
 /* L3 -> L4_CORE interface */
 static struct omap_hwmod_ocp_if omap2420_l3_main__l4_core = {
@@ -779,6 +780,88 @@ static struct omap_hwmod omap2420_gpio4_hwmod = {
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP2420),
 };
 
+/* system dma */
+static struct omap_hwmod_class_sysconfig omap2420_dma_sysc = {
+	.rev_offs	= 0x0000,
+	.sysc_offs	= 0x002c,
+	.syss_offs	= 0x0028,
+	.sysc_flags	= (SYSC_HAS_SOFTRESET | SYSC_HAS_MIDLEMODE |
+			   SYSC_HAS_CLOCKACTIVITY | SYSC_HAS_EMUFREE |
+			   SYSC_HAS_AUTOIDLE),
+	.idlemodes	= (MSTANDBY_FORCE | MSTANDBY_NO | MSTANDBY_SMART),
+	.sysc_fields	= &omap_hwmod_sysc_type1,
+};
+
+static struct omap_hwmod_class omap2420_dma_hwmod_class = {
+	.name = "dma",
+	.sysc = &omap2420_dma_sysc,
+};
+
+/* dma attributes */
+static struct omap_dma_dev_attr dma_dev_attr = {
+	.dev_caps  = RESERVE_CHANNEL | DMA_LINKED_LCH | GLOBAL_PRIORITY |
+						IS_CSSA_32 | IS_CDSA_32,
+	.lch_count = 32,
+};
+
+static struct omap_hwmod_irq_info omap2420_dma_system_irqs[] = {
+	{ .name = "0", .irq = 12 }, /* INT_24XX_SDMA_IRQ0 */
+	{ .name = "1", .irq = 13 }, /* INT_24XX_SDMA_IRQ1 */
+	{ .name = "2", .irq = 14 }, /* INT_24XX_SDMA_IRQ2 */
+	{ .name = "3", .irq = 15 }, /* INT_24XX_SDMA_IRQ3 */
+};
+
+static struct omap_hwmod_addr_space omap2420_dma_system_addrs[] = {
+	{
+		.pa_start	= 0x48056000,
+		.pa_end		= 0x4a0560ff,
+		.flags		= ADDR_TYPE_RT
+	},
+};
+
+/* dma_system -> L3 */
+static struct omap_hwmod_ocp_if omap2420_dma_system__l3 = {
+	.master		= &omap2420_dma_system_hwmod,
+	.slave		= &omap2420_l3_main_hwmod,
+	.clk		= "core_l3_ck",
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma_system master ports */
+static struct omap_hwmod_ocp_if *omap2420_dma_system_masters[] = {
+	&omap2420_dma_system__l3,
+};
+
+/* l4_core -> dma_system */
+static struct omap_hwmod_ocp_if omap2420_l4_core__dma_system = {
+	.master		= &omap2420_l4_core_hwmod,
+	.slave		= &omap2420_dma_system_hwmod,
+	.clk		= "sdma_ick",
+	.addr		= omap2420_dma_system_addrs,
+	.addr_cnt	= ARRAY_SIZE(omap2420_dma_system_addrs),
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma_system slave ports */
+static struct omap_hwmod_ocp_if *omap2420_dma_system_slaves[] = {
+	&omap2420_l4_core__dma_system,
+};
+
+static struct omap_hwmod omap2420_dma_system_hwmod = {
+	.name		= "dma",
+	.class		= &omap2420_dma_hwmod_class,
+	.mpu_irqs	= omap2420_dma_system_irqs,
+	.mpu_irqs_cnt	= ARRAY_SIZE(omap2420_dma_system_irqs),
+	.main_clk	= "core_l3_ck",
+	.slaves		= omap2420_dma_system_slaves,
+	.slaves_cnt	= ARRAY_SIZE(omap2420_dma_system_slaves),
+	.masters	= omap2420_dma_system_masters,
+	.masters_cnt	= ARRAY_SIZE(omap2420_dma_system_masters),
+	.dev_attr	= &dma_dev_attr,
+	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP2420),
+	.flags		= HWMOD_NO_IDLEST,
+};
+
 static __initdata struct omap_hwmod *omap2420_hwmods[] = {
 	&omap2420_l3_main_hwmod,
 	&omap2420_l4_core_hwmod,
@@ -797,6 +880,9 @@ static __initdata struct omap_hwmod *omap2420_hwmods[] = {
 	&omap2420_gpio2_hwmod,
 	&omap2420_gpio3_hwmod,
 	&omap2420_gpio4_hwmod,
+
+	/* dma_system class*/
+	&omap2420_dma_system_hwmod,
 	NULL,
 };
 

arch/arm/mach-omap2/omap_hwmod_2430_data.c

@@ -43,6 +43,7 @@ static struct omap_hwmod omap2430_gpio2_hwmod;
 static struct omap_hwmod omap2430_gpio3_hwmod;
 static struct omap_hwmod omap2430_gpio4_hwmod;
 static struct omap_hwmod omap2430_gpio5_hwmod;
+static struct omap_hwmod omap2430_dma_system_hwmod;
 
 /* L3 -> L4_CORE interface */
 static struct omap_hwmod_ocp_if omap2430_l3_main__l4_core = {
@@ -838,6 +839,88 @@ static struct omap_hwmod omap2430_gpio5_hwmod = {
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP2430),
 };
 
+/* dma_system */
+static struct omap_hwmod_class_sysconfig omap2430_dma_sysc = {
+	.rev_offs	= 0x0000,
+	.sysc_offs	= 0x002c,
+	.syss_offs	= 0x0028,
+	.sysc_flags	= (SYSC_HAS_SOFTRESET | SYSC_HAS_MIDLEMODE |
+			   SYSC_HAS_CLOCKACTIVITY | SYSC_HAS_EMUFREE |
+			   SYSC_HAS_AUTOIDLE),
+	.idlemodes	= (MSTANDBY_FORCE | MSTANDBY_NO | MSTANDBY_SMART),
+	.sysc_fields	= &omap_hwmod_sysc_type1,
+};
+
+static struct omap_hwmod_class omap2430_dma_hwmod_class = {
+	.name = "dma",
+	.sysc = &omap2430_dma_sysc,
+};
+
+/* dma attributes */
+static struct omap_dma_dev_attr dma_dev_attr = {
+	.dev_caps  = RESERVE_CHANNEL | DMA_LINKED_LCH | GLOBAL_PRIORITY |
+				IS_CSSA_32 | IS_CDSA_32 | IS_RW_PRIORITY,
+	.lch_count = 32,
+};
+
+static struct omap_hwmod_irq_info omap2430_dma_system_irqs[] = {
+	{ .name = "0", .irq = 12 }, /* INT_24XX_SDMA_IRQ0 */
+	{ .name = "1", .irq = 13 }, /* INT_24XX_SDMA_IRQ1 */
+	{ .name = "2", .irq = 14 }, /* INT_24XX_SDMA_IRQ2 */
+	{ .name = "3", .irq = 15 }, /* INT_24XX_SDMA_IRQ3 */
+};
+
+static struct omap_hwmod_addr_space omap2430_dma_system_addrs[] = {
+	{
+		.pa_start	= 0x48056000,
+		.pa_end		= 0x4a0560ff,
+		.flags		= ADDR_TYPE_RT
+	},
+};
+
+/* dma_system -> L3 */
+static struct omap_hwmod_ocp_if omap2430_dma_system__l3 = {
+	.master		= &omap2430_dma_system_hwmod,
+	.slave		= &omap2430_l3_main_hwmod,
+	.clk		= "core_l3_ck",
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma_system master ports */
+static struct omap_hwmod_ocp_if *omap2430_dma_system_masters[] = {
+	&omap2430_dma_system__l3,
+};
+
+/* l4_core -> dma_system */
+static struct omap_hwmod_ocp_if omap2430_l4_core__dma_system = {
+	.master		= &omap2430_l4_core_hwmod,
+	.slave		= &omap2430_dma_system_hwmod,
+	.clk		= "sdma_ick",
+	.addr		= omap2430_dma_system_addrs,
+	.addr_cnt	= ARRAY_SIZE(omap2430_dma_system_addrs),
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma_system slave ports */
+static struct omap_hwmod_ocp_if *omap2430_dma_system_slaves[] = {
+	&omap2430_l4_core__dma_system,
+};
+
+static struct omap_hwmod omap2430_dma_system_hwmod = {
+	.name		= "dma",
+	.class		= &omap2430_dma_hwmod_class,
+	.mpu_irqs	= omap2430_dma_system_irqs,
+	.mpu_irqs_cnt	= ARRAY_SIZE(omap2430_dma_system_irqs),
+	.main_clk	= "core_l3_ck",
+	.slaves		= omap2430_dma_system_slaves,
+	.slaves_cnt	= ARRAY_SIZE(omap2430_dma_system_slaves),
+	.masters	= omap2430_dma_system_masters,
+	.masters_cnt	= ARRAY_SIZE(omap2430_dma_system_masters),
+	.dev_attr	= &dma_dev_attr,
+	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP2430),
+	.flags		= HWMOD_NO_IDLEST,
+};
+
 static __initdata struct omap_hwmod *omap2430_hwmods[] = {
 	&omap2430_l3_main_hwmod,
 	&omap2430_l4_core_hwmod,
@@ -857,6 +940,9 @@ static __initdata struct omap_hwmod *omap2430_hwmods[] = {
 	&omap2430_gpio3_hwmod,
 	&omap2430_gpio4_hwmod,
 	&omap2430_gpio5_hwmod,
+
+	/* dma_system class*/
+	&omap2430_dma_system_hwmod,
 	NULL,
 };
 

arch/arm/mach-omap2/omap_hwmod_3xxx_data.c

@@ -52,6 +52,8 @@ static struct omap_hwmod omap3xxx_gpio4_hwmod;
 static struct omap_hwmod omap3xxx_gpio5_hwmod;
 static struct omap_hwmod omap3xxx_gpio6_hwmod;
 
+static struct omap_hwmod omap3xxx_dma_system_hwmod;
+
 /* L3 -> L4_CORE interface */
 static struct omap_hwmod_ocp_if omap3xxx_l3_main__l4_core = {
 	.master	= &omap3xxx_l3_main_hwmod,
@@ -1090,6 +1092,98 @@ static struct omap_hwmod omap3xxx_gpio6_hwmod = {
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
 };
 
+/* dma_system -> L3 */
+static struct omap_hwmod_ocp_if omap3xxx_dma_system__l3 = {
+	.master		= &omap3xxx_dma_system_hwmod,
+	.slave		= &omap3xxx_l3_main_hwmod,
+	.clk		= "core_l3_ick",
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma attributes */
+static struct omap_dma_dev_attr dma_dev_attr = {
+	.dev_caps  = RESERVE_CHANNEL | DMA_LINKED_LCH | GLOBAL_PRIORITY |
+				IS_CSSA_32 | IS_CDSA_32 | IS_RW_PRIORITY,
+	.lch_count = 32,
+};
+
+static struct omap_hwmod_class_sysconfig omap3xxx_dma_sysc = {
+	.rev_offs	= 0x0000,
+	.sysc_offs	= 0x002c,
+	.syss_offs	= 0x0028,
+	.sysc_flags	= (SYSC_HAS_SIDLEMODE | SYSC_HAS_SOFTRESET |
+			   SYSC_HAS_MIDLEMODE | SYSC_HAS_CLOCKACTIVITY |
+			   SYSC_HAS_EMUFREE | SYSC_HAS_AUTOIDLE),
+	.idlemodes	= (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
+			   MSTANDBY_FORCE | MSTANDBY_NO | MSTANDBY_SMART),
+	.sysc_fields	= &omap_hwmod_sysc_type1,
+};
+
+static struct omap_hwmod_class omap3xxx_dma_hwmod_class = {
+	.name = "dma",
+	.sysc = &omap3xxx_dma_sysc,
+};
+
+/* dma_system */
+static struct omap_hwmod_irq_info omap3xxx_dma_system_irqs[] = {
+	{ .name = "0", .irq = 12 }, /* INT_24XX_SDMA_IRQ0 */
+	{ .name = "1", .irq = 13 }, /* INT_24XX_SDMA_IRQ1 */
+	{ .name = "2", .irq = 14 }, /* INT_24XX_SDMA_IRQ2 */
+	{ .name = "3", .irq = 15 }, /* INT_24XX_SDMA_IRQ3 */
+};
+
+static struct omap_hwmod_addr_space omap3xxx_dma_system_addrs[] = {
+	{
+		.pa_start	= 0x48056000,
+		.pa_end		= 0x4a0560ff,
+		.flags		= ADDR_TYPE_RT
+	},
+};
+
+/* dma_system master ports */
+static struct omap_hwmod_ocp_if *omap3xxx_dma_system_masters[] = {
+	&omap3xxx_dma_system__l3,
+};
+
+/* l4_cfg -> dma_system */
+static struct omap_hwmod_ocp_if omap3xxx_l4_core__dma_system = {
+	.master		= &omap3xxx_l4_core_hwmod,
+	.slave		= &omap3xxx_dma_system_hwmod,
+	.clk		= "core_l4_ick",
+	.addr		= omap3xxx_dma_system_addrs,
+	.addr_cnt	= ARRAY_SIZE(omap3xxx_dma_system_addrs),
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma_system slave ports */
+static struct omap_hwmod_ocp_if *omap3xxx_dma_system_slaves[] = {
+	&omap3xxx_l4_core__dma_system,
+};
+
+static struct omap_hwmod omap3xxx_dma_system_hwmod = {
+	.name		= "dma",
+	.class		= &omap3xxx_dma_hwmod_class,
+	.mpu_irqs	= omap3xxx_dma_system_irqs,
+	.mpu_irqs_cnt	= ARRAY_SIZE(omap3xxx_dma_system_irqs),
+	.main_clk	= "core_l3_ick",
+	.prcm = {
+		.omap2 = {
+			.module_offs		= CORE_MOD,
+			.prcm_reg_id		= 1,
+			.module_bit		= OMAP3430_ST_SDMA_SHIFT,
+			.idlest_reg_id		= 1,
+			.idlest_idle_bit	= OMAP3430_ST_SDMA_SHIFT,
+		},
+	},
+	.slaves		= omap3xxx_dma_system_slaves,
+	.slaves_cnt	= ARRAY_SIZE(omap3xxx_dma_system_slaves),
+	.masters	= omap3xxx_dma_system_masters,
+	.masters_cnt	= ARRAY_SIZE(omap3xxx_dma_system_masters),
+	.dev_attr	= &dma_dev_attr,
+	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
+	.flags		= HWMOD_NO_IDLEST,
+};
+
 static __initdata struct omap_hwmod *omap3xxx_hwmods[] = {
 	&omap3xxx_l3_main_hwmod,
 	&omap3xxx_l4_core_hwmod,
@@ -1113,6 +1207,9 @@ static __initdata struct omap_hwmod *omap3xxx_hwmods[] = {
 	&omap3xxx_gpio4_hwmod,
 	&omap3xxx_gpio5_hwmod,
 	&omap3xxx_gpio6_hwmod,
+
+	/* dma_system class*/
+	&omap3xxx_dma_system_hwmod,
 	NULL,
 };
 

arch/arm/mach-omap2/omap_hwmod_44xx_data.c

@@ -23,6 +23,7 @@
 #include <plat/omap_hwmod.h>
 #include <plat/cpu.h>
 #include <plat/gpio.h>
+#include <plat/dma.h>
 
 #include "omap_hwmod_common_data.h"
 
@@ -36,6 +37,7 @@
 #define OMAP44XX_DMA_REQ_START  1
 
 /* Backward references (IPs with Bus Master capability) */
+static struct omap_hwmod omap44xx_dma_system_hwmod;
 static struct omap_hwmod omap44xx_dmm_hwmod;
 static struct omap_hwmod omap44xx_emif_fw_hwmod;
 static struct omap_hwmod omap44xx_l3_instr_hwmod;
@@ -216,6 +218,14 @@ static struct omap_hwmod_ocp_if omap44xx_l3_main_1__l3_main_2 = {
 	.user		= OCP_USER_MPU | OCP_USER_SDMA,
 };
 
+/* dma_system -> l3_main_2 */
+static struct omap_hwmod_ocp_if omap44xx_dma_system__l3_main_2 = {
+	.master		= &omap44xx_dma_system_hwmod,
+	.slave		= &omap44xx_l3_main_2_hwmod,
+	.clk		= "l3_div_ck",
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
 /* l4_cfg -> l3_main_2 */
 static struct omap_hwmod_ocp_if omap44xx_l4_cfg__l3_main_2 = {
 	.master		= &omap44xx_l4_cfg_hwmod,
@@ -226,6 +236,7 @@ static struct omap_hwmod_ocp_if omap44xx_l4_cfg__l3_main_2 = {
 
 /* l3_main_2 slave ports */
 static struct omap_hwmod_ocp_if *omap44xx_l3_main_2_slaves[] = {
+	&omap44xx_dma_system__l3_main_2,
 	&omap44xx_l3_main_1__l3_main_2,
 	&omap44xx_l4_cfg__l3_main_2,
 };
@@ -1376,6 +1387,93 @@ static struct omap_hwmod omap44xx_gpio6_hwmod = {
 	.slaves_cnt	= ARRAY_SIZE(omap44xx_gpio6_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
 };
+
+/*
+ * 'dma' class
+ * dma controller for data exchange between memory to memory (i.e. internal or
+ * external memory) and gp peripherals to memory or memory to gp peripherals
+ */
+
+static struct omap_hwmod_class_sysconfig omap44xx_dma_sysc = {
+	.rev_offs	= 0x0000,
+	.sysc_offs	= 0x002c,
+	.syss_offs	= 0x0028,
+	.sysc_flags	= (SYSC_HAS_AUTOIDLE | SYSC_HAS_CLOCKACTIVITY |
+			   SYSC_HAS_EMUFREE | SYSC_HAS_MIDLEMODE |
+			   SYSC_HAS_SIDLEMODE | SYSC_HAS_SOFTRESET |
+			   SYSS_HAS_RESET_STATUS),
+	.idlemodes	= (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
+			   MSTANDBY_FORCE | MSTANDBY_NO | MSTANDBY_SMART),
+	.sysc_fields	= &omap_hwmod_sysc_type1,
+};
+
+/* dma attributes */
+static struct omap_dma_dev_attr dma_dev_attr = {
+	.dev_caps  = RESERVE_CHANNEL | DMA_LINKED_LCH | GLOBAL_PRIORITY |
+				IS_CSSA_32 | IS_CDSA_32 | IS_RW_PRIORITY,
+	.lch_count = 32,
+};
+
+static struct omap_hwmod_class omap44xx_dma_hwmod_class = {
+	.name	= "dma",
+	.sysc	= &omap44xx_dma_sysc,
+};
+
+/* dma_system */
+static struct omap_hwmod_irq_info omap44xx_dma_system_irqs[] = {
+	{ .name = "0", .irq = 12 + OMAP44XX_IRQ_GIC_START },
+	{ .name = "1", .irq = 13 + OMAP44XX_IRQ_GIC_START },
+	{ .name = "2", .irq = 14 + OMAP44XX_IRQ_GIC_START },
+	{ .name = "3", .irq = 15 + OMAP44XX_IRQ_GIC_START },
+};
+
+/* dma_system master ports */
+static struct omap_hwmod_ocp_if *omap44xx_dma_system_masters[] = {
+	&omap44xx_dma_system__l3_main_2,
+};
+
+static struct omap_hwmod_addr_space omap44xx_dma_system_addrs[] = {
+	{
+		.pa_start	= 0x4a056000,
+		.pa_end		= 0x4a0560ff,
+		.flags		= ADDR_TYPE_RT
+	},
+};
+
+/* l4_cfg -> dma_system */
+static struct omap_hwmod_ocp_if omap44xx_l4_cfg__dma_system = {
+	.master		= &omap44xx_l4_cfg_hwmod,
+	.slave		= &omap44xx_dma_system_hwmod,
+	.clk		= "l4_div_ck",
+	.addr		= omap44xx_dma_system_addrs,
+	.addr_cnt	= ARRAY_SIZE(omap44xx_dma_system_addrs),
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
+/* dma_system slave ports */
+static struct omap_hwmod_ocp_if *omap44xx_dma_system_slaves[] = {
+	&omap44xx_l4_cfg__dma_system,
+};
+
+static struct omap_hwmod omap44xx_dma_system_hwmod = {
+	.name		= "dma_system",
+	.class		= &omap44xx_dma_hwmod_class,
+	.mpu_irqs	= omap44xx_dma_system_irqs,
+	.mpu_irqs_cnt	= ARRAY_SIZE(omap44xx_dma_system_irqs),
+	.main_clk	= "l3_div_ck",
+	.prcm = {
+		.omap4 = {
+			.clkctrl_reg = OMAP4430_CM_SDMA_SDMA_CLKCTRL,
+		},
+	},
+	.slaves		= omap44xx_dma_system_slaves,
+	.slaves_cnt	= ARRAY_SIZE(omap44xx_dma_system_slaves),
+	.masters	= omap44xx_dma_system_masters,
+	.masters_cnt	= ARRAY_SIZE(omap44xx_dma_system_masters),
+	.dev_attr	= &dma_dev_attr,
+	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
+};
+
 static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
 	/* dmm class */
 	&omap44xx_dmm_hwmod,
@@ -1391,6 +1489,10 @@ static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
 	&omap44xx_l4_cfg_hwmod,
 	&omap44xx_l4_per_hwmod,
 	&omap44xx_l4_wkup_hwmod,
+
+	/* dma class */
+	&omap44xx_dma_system_hwmod,
+
 	/* i2c class */
 	&omap44xx_i2c1_hwmod,
 	&omap44xx_i2c2_hwmod,

arch/arm/plat-omap/include/plat/dma.h

@@ -21,141 +21,15 @@
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H
 
-/* Move omap4 specific defines to dma-44xx.h */
-#include "dma-44xx.h"
+#include <linux/platform_device.h>
 
-/* Hardware registers for omap1 */
-#define OMAP1_DMA_BASE			(0xfffed800)
-
-#define OMAP1_DMA_GCR			0x400
-#define OMAP1_DMA_GSCR			0x404
-#define OMAP1_DMA_GRST			0x408
-#define OMAP1_DMA_HW_ID			0x442
-#define OMAP1_DMA_PCH2_ID		0x444
-#define OMAP1_DMA_PCH0_ID		0x446
-#define OMAP1_DMA_PCH1_ID		0x448
-#define OMAP1_DMA_PCHG_ID		0x44a
-#define OMAP1_DMA_PCHD_ID		0x44c
-#define OMAP1_DMA_CAPS_0_U		0x44e
-#define OMAP1_DMA_CAPS_0_L		0x450
-#define OMAP1_DMA_CAPS_1_U		0x452
-#define OMAP1_DMA_CAPS_1_L		0x454
-#define OMAP1_DMA_CAPS_2		0x456
-#define OMAP1_DMA_CAPS_3		0x458
-#define OMAP1_DMA_CAPS_4		0x45a
-#define OMAP1_DMA_PCH2_SR		0x460
-#define OMAP1_DMA_PCH0_SR		0x480
-#define OMAP1_DMA_PCH1_SR		0x482
-#define OMAP1_DMA_PCHD_SR		0x4c0
-
-/* Hardware registers for omap2 and omap3 */
-#define OMAP24XX_DMA4_BASE		(L4_24XX_BASE + 0x56000)
-#define OMAP34XX_DMA4_BASE		(L4_34XX_BASE + 0x56000)
-#define OMAP44XX_DMA4_BASE		(L4_44XX_BASE + 0x56000)
-
-#define OMAP_DMA4_REVISION		0x00
-#define OMAP_DMA4_GCR			0x78
-#define OMAP_DMA4_IRQSTATUS_L0		0x08
-#define OMAP_DMA4_IRQSTATUS_L1		0x0c
-#define OMAP_DMA4_IRQSTATUS_L2		0x10
-#define OMAP_DMA4_IRQSTATUS_L3		0x14
-#define OMAP_DMA4_IRQENABLE_L0		0x18
-#define OMAP_DMA4_IRQENABLE_L1		0x1c
-#define OMAP_DMA4_IRQENABLE_L2		0x20
-#define OMAP_DMA4_IRQENABLE_L3		0x24
-#define OMAP_DMA4_SYSSTATUS		0x28
-#define OMAP_DMA4_OCP_SYSCONFIG		0x2c
-#define OMAP_DMA4_CAPS_0		0x64
-#define OMAP_DMA4_CAPS_2		0x6c
-#define OMAP_DMA4_CAPS_3		0x70
-#define OMAP_DMA4_CAPS_4		0x74
-
-#define OMAP1_LOGICAL_DMA_CH_COUNT	17
-#define OMAP_DMA4_LOGICAL_DMA_CH_COUNT	32	/* REVISIT: Is this 32 + 2? */
-
-/* Common channel specific registers for omap1 */
-#define OMAP1_DMA_CH_BASE(n)		(0x40 * (n) + 0x00)
-#define OMAP1_DMA_CSDP(n)		(0x40 * (n) + 0x00)
-#define OMAP1_DMA_CCR(n)		(0x40 * (n) + 0x02)
-#define OMAP1_DMA_CICR(n)		(0x40 * (n) + 0x04)
-#define OMAP1_DMA_CSR(n)		(0x40 * (n) + 0x06)
-#define OMAP1_DMA_CEN(n)		(0x40 * (n) + 0x10)
-#define OMAP1_DMA_CFN(n)		(0x40 * (n) + 0x12)
-#define OMAP1_DMA_CSFI(n)		(0x40 * (n) + 0x14)
-#define OMAP1_DMA_CSEI(n)		(0x40 * (n) + 0x16)
-#define OMAP1_DMA_CPC(n)		(0x40 * (n) + 0x18)	/* 15xx only */
-#define OMAP1_DMA_CSAC(n)		(0x40 * (n) + 0x18)
-#define OMAP1_DMA_CDAC(n)		(0x40 * (n) + 0x1a)
-#define OMAP1_DMA_CDEI(n)		(0x40 * (n) + 0x1c)
-#define OMAP1_DMA_CDFI(n)		(0x40 * (n) + 0x1e)
-#define OMAP1_DMA_CLNK_CTRL(n)		(0x40 * (n) + 0x28)
-
-/* Common channel specific registers for omap2 */
-#define OMAP_DMA4_CH_BASE(n)		(0x60 * (n) + 0x80)
-#define OMAP_DMA4_CCR(n)		(0x60 * (n) + 0x80)
-#define OMAP_DMA4_CLNK_CTRL(n)		(0x60 * (n) + 0x84)
-#define OMAP_DMA4_CICR(n)		(0x60 * (n) + 0x88)
-#define OMAP_DMA4_CSR(n)		(0x60 * (n) + 0x8c)
-#define OMAP_DMA4_CSDP(n)		(0x60 * (n) + 0x90)
-#define OMAP_DMA4_CEN(n)		(0x60 * (n) + 0x94)
-#define OMAP_DMA4_CFN(n)		(0x60 * (n) + 0x98)
-#define OMAP_DMA4_CSEI(n)		(0x60 * (n) + 0xa4)
-#define OMAP_DMA4_CSFI(n)		(0x60 * (n) + 0xa8)
-#define OMAP_DMA4_CDEI(n)		(0x60 * (n) + 0xac)
-#define OMAP_DMA4_CDFI(n)		(0x60 * (n) + 0xb0)
-#define OMAP_DMA4_CSAC(n)		(0x60 * (n) + 0xb4)
-#define OMAP_DMA4_CDAC(n)		(0x60 * (n) + 0xb8)
-
-/* Channel specific registers only on omap1 */
-#define OMAP1_DMA_CSSA_L(n)		(0x40 * (n) + 0x08)
-#define OMAP1_DMA_CSSA_U(n)		(0x40 * (n) + 0x0a)
-#define OMAP1_DMA_CDSA_L(n)		(0x40 * (n) + 0x0c)
-#define OMAP1_DMA_CDSA_U(n)		(0x40 * (n) + 0x0e)
-#define OMAP1_DMA_COLOR_L(n)		(0x40 * (n) + 0x20)
-#define OMAP1_DMA_COLOR_U(n)		(0x40 * (n) + 0x22)
-#define OMAP1_DMA_CCR2(n)		(0x40 * (n) + 0x24)
-#define OMAP1_DMA_LCH_CTRL(n)		(0x40 * (n) + 0x2a)	/* not on 15xx */
-#define OMAP1_DMA_CCEN(n)		0
-#define OMAP1_DMA_CCFN(n)		0
-
-/* Channel specific registers only on omap2 */
-#define OMAP_DMA4_CSSA(n)		(0x60 * (n) + 0x9c)
-#define OMAP_DMA4_CDSA(n)		(0x60 * (n) + 0xa0)
-#define OMAP_DMA4_CCEN(n)		(0x60 * (n) + 0xbc)
-#define OMAP_DMA4_CCFN(n)		(0x60 * (n) + 0xc0)
-#define OMAP_DMA4_COLOR(n)		(0x60 * (n) + 0xc4)
-
-/* Additional registers available on OMAP4 */
-#define OMAP_DMA4_CDP(n)		(0x60 * (n) + 0xd0)
-#define OMAP_DMA4_CNDP(n)		(0x60 * (n) + 0xd4)
-#define OMAP_DMA4_CCDN(n)		(0x60 * (n) + 0xd8)
-
-/* Dummy defines to keep multi-omap compiles happy */
-#define OMAP1_DMA_REVISION		0
-#define OMAP1_DMA_IRQSTATUS_L0		0
-#define OMAP1_DMA_IRQENABLE_L0		0
-#define OMAP1_DMA_OCP_SYSCONFIG		0
-#define OMAP_DMA4_HW_ID			0
-#define OMAP_DMA4_CAPS_0_L		0
-#define OMAP_DMA4_CAPS_0_U		0
-#define OMAP_DMA4_CAPS_1_L		0
-#define OMAP_DMA4_CAPS_1_U		0
-#define OMAP_DMA4_GSCR			0
-#define OMAP_DMA4_CPC(n)		0
-
-#define OMAP_DMA4_LCH_CTRL(n)		0
-#define OMAP_DMA4_COLOR_L(n)		0
-#define OMAP_DMA4_COLOR_U(n)		0
-#define OMAP_DMA4_CCR2(n)		0
-#define OMAP1_DMA_CSSA(n)		0
-#define OMAP1_DMA_CDSA(n)		0
-#define OMAP_DMA4_CSSA_L(n)		0
-#define OMAP_DMA4_CSSA_U(n)		0
-#define OMAP_DMA4_CDSA_L(n)		0
-#define OMAP_DMA4_CDSA_U(n)		0
-#define OMAP1_DMA_COLOR(n)		0
+/*
+ * TODO: These dma channel defines should go away once all
+ * the omap drivers hwmod adapted.
+ */
 
-/*----------------------------------------------------------------------------*/
+/* Move omap4 specific defines to dma-44xx.h */
+#include "dma-44xx.h"
 
 /* DMA channels for omap1 */
 #define OMAP_DMA_NO_DEVICE		0
@@ -405,6 +279,63 @@
 #define DMA_CH_PRIO_HIGH		0x1
 #define DMA_CH_PRIO_LOW			0x0 /* Def */
 
+/* Errata handling */
+#define IS_DMA_ERRATA(id)		(errata & (id))
+#define SET_DMA_ERRATA(id)		(errata |= (id))
+
+#define DMA_ERRATA_IFRAME_BUFFERING	BIT(0x0)
+#define DMA_ERRATA_PARALLEL_CHANNELS	BIT(0x1)
+#define DMA_ERRATA_i378			BIT(0x2)
+#define DMA_ERRATA_i541			BIT(0x3)
+#define DMA_ERRATA_i88			BIT(0x4)
+#define DMA_ERRATA_3_3			BIT(0x5)
+#define DMA_ROMCODE_BUG			BIT(0x6)
+
+/* Attributes for OMAP DMA Contrller */
+#define DMA_LINKED_LCH			BIT(0x0)
+#define GLOBAL_PRIORITY			BIT(0x1)
+#define RESERVE_CHANNEL			BIT(0x2)
+#define IS_CSSA_32			BIT(0x3)
+#define IS_CDSA_32			BIT(0x4)
+#define IS_RW_PRIORITY			BIT(0x5)
+#define ENABLE_1510_MODE		BIT(0x6)
+#define SRC_PORT			BIT(0x7)
+#define DST_PORT			BIT(0x8)
+#define SRC_INDEX			BIT(0x9)
+#define DST_INDEX			BIT(0xA)
+#define IS_BURST_ONLY4			BIT(0xB)
+#define CLEAR_CSR_ON_READ		BIT(0xC)
+#define IS_WORD_16			BIT(0xD)
+
+enum omap_reg_offsets {
+
+GCR,		GSCR,		GRST1,		HW_ID,
+PCH2_ID,	PCH0_ID,	PCH1_ID,	PCHG_ID,
+PCHD_ID,	CAPS_0,		CAPS_1,		CAPS_2,
+CAPS_3,		CAPS_4,		PCH2_SR,	PCH0_SR,
+PCH1_SR,	PCHD_SR,	REVISION,	IRQSTATUS_L0,
+IRQSTATUS_L1,	IRQSTATUS_L2,	IRQSTATUS_L3,	IRQENABLE_L0,
+IRQENABLE_L1,	IRQENABLE_L2,	IRQENABLE_L3,	SYSSTATUS,
+OCP_SYSCONFIG,
+
+/* omap1+ specific */
+CPC, CCR2, LCH_CTRL,
+
+/* Common registers for all omap's */
+CSDP,		CCR,		CICR,		CSR,
+CEN,		CFN,		CSFI,		CSEI,
+CSAC,		CDAC,		CDEI,
+CDFI,		CLNK_CTRL,
+
+/* Channel specific registers */
+CSSA,		CDSA,		COLOR,
+CCEN,		CCFN,
+
+/* omap3630 and omap4 specific */
+CDP,		CNDP,		CCDN,
+
+};
+
 enum omap_dma_burst_mode {
 	OMAP_DMA_DATA_BURST_DIS = 0,
 	OMAP_DMA_DATA_BURST_4,
@@ -470,6 +401,41 @@ struct omap_dma_channel_params {
 #endif
 };
 
+struct omap_dma_lch {
+	int next_lch;
+	int dev_id;
+	u16 saved_csr;
+	u16 enabled_irqs;
+	const char *dev_name;
+	void (*callback)(int lch, u16 ch_status, void *data);
+	void *data;
+	long flags;
+	/* required for Dynamic chaining */
+	int prev_linked_ch;
+	int next_linked_ch;
+	int state;
+	int chain_id;
+	int status;
+};
+
+struct omap_dma_dev_attr {
+	u32 dev_caps;
+	u16 lch_count;
+	u16 chan_count;
+	struct omap_dma_lch *chan;
+};
+
+/* System DMA platform data structure */
+struct omap_system_dma_plat_info {
+	struct omap_dma_dev_attr *dma_attr;
+	u32 errata;
+	void (*disable_irq_lch)(int lch);
+	void (*show_dma_caps)(void);
+	void (*clear_lch_regs)(int lch);
+	void (*clear_dma)(int lch);
+	void (*dma_write)(u32 val, int reg, int lch);
+	u32 (*dma_read)(int reg, int lch);
+};
 
 extern void omap_set_dma_priority(int lch, int dst_port, int priority);
 extern int omap_request_dma(int dev_id, const char *dev_name,