ARM: omap1: move plat/dma.c to mach/omap-dma.c

Most of the interface functions in plat/dma.c are only used from the
USB driver, which is practically OMAP1 specific, except for compile
testing.

The omap_get_plat_info(), omap_request_dma() and omap_free_dma()
functions are never called on omap2 because of runtime checks.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 897 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
deleted file mode 100644
index eb14528f133c..000000000000
--- a/arch/arm/plat-omap/dma.c
+++ /dev/null
@@ -1,897 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * linux/arch/arm/plat-omap/dma.c
- *
- * 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.
- * Merged to support both OMAP1 and OMAP2 by Tony Lindgren <tony@atomide.com>
- * 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>
- *
- * Support functions for the OMAP internal DMA channels.
- *
- * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com/
- * Converted DMA library into DMA platform driver.
- *	- G, Manjunath Kondaiah <manjugk@ti.com>
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-
-#include <linux/omap-dma.h>
-
-#include <mach/hardware.h>
-#include <linux/soc/ti/omap1-io.h>
-#include <linux/soc/ti/omap1-soc.h>
-
-/*
- * MAX_LOGICAL_DMA_CH_COUNT: the maximum number of logical DMA
- * channels that an instance of the SDMA IP block can support.  Used
- * to size arrays.  (The actual maximum on a particular SoC may be less
- * than this -- for example, OMAP1 SDMA instances only support 17 logical
- * DMA channels.)
- */
-#define MAX_LOGICAL_DMA_CH_COUNT		32
-
-#undef DEBUG
-
-#define OMAP_DMA_ACTIVE			0x01
-
-#define OMAP_FUNC_MUX_ARM_BASE		(0xfffe1000 + 0xec)
-
-static struct omap_system_dma_plat_info *p;
-static struct omap_dma_dev_attr *d;
-static int enable_1510_mode;
-static u32 errata;
-
-struct dma_link_info {
-	int *linked_dmach_q;
-	int no_of_lchs_linked;
-
-	int q_count;
-	int q_tail;
-	int q_head;
-
-	int chain_state;
-	int chain_mode;
-
-};
-
-static int dma_lch_count;
-static int dma_chan_count;
-static int omap_dma_reserve_channels;
-
-static DEFINE_SPINLOCK(dma_chan_lock);
-static struct omap_dma_lch *dma_chan;
-
-static inline void omap_disable_channel_irq(int lch)
-{
-	/* disable channel interrupts */
-	p->dma_write(0, CICR, lch);
-	/* Clear CSR */
-	p->dma_read(CSR, lch);
-}
-
-static inline void set_gdma_dev(int req, int dev)
-{
-	u32 reg = OMAP_FUNC_MUX_ARM_BASE + ((req - 1) / 5) * 4;
-	int shift = ((req - 1) % 5) * 6;
-	u32 l;
-
-	l = omap_readl(reg);
-	l &= ~(0x3f << shift);
-	l |= (dev - 1) << shift;
-	omap_writel(l, reg);
-}
-
-#ifdef CONFIG_ARCH_OMAP1
-void omap_set_dma_priority(int lch, int dst_port, int priority)
-{
-	unsigned long reg;
-	u32 l;
-
-	if (dma_omap1()) {
-		switch (dst_port) {
-		case OMAP_DMA_PORT_OCP_T1:	/* FFFECC00 */
-			reg = OMAP_TC_OCPT1_PRIOR;
-			break;
-		case OMAP_DMA_PORT_OCP_T2:	/* FFFECCD0 */
-			reg = OMAP_TC_OCPT2_PRIOR;
-			break;
-		case OMAP_DMA_PORT_EMIFF:	/* FFFECC08 */
-			reg = OMAP_TC_EMIFF_PRIOR;
-			break;
-		case OMAP_DMA_PORT_EMIFS:	/* FFFECC04 */
-			reg = OMAP_TC_EMIFS_PRIOR;
-			break;
-		default:
-			BUG();
-			return;
-		}
-		l = omap_readl(reg);
-		l &= ~(0xf << 8);
-		l |= (priority & 0xf) << 8;
-		omap_writel(l, reg);
-	}
-}
-#endif
-
-#ifdef CONFIG_ARCH_OMAP2PLUS
-void omap_set_dma_priority(int lch, int dst_port, int priority)
-{
-	u32 ccr;
-
-	ccr = p->dma_read(CCR, lch);
-	if (priority)
-		ccr |= (1 << 6);
-	else
-		ccr &= ~(1 << 6);
-	p->dma_write(ccr, CCR, lch);
-}
-#endif
-EXPORT_SYMBOL(omap_set_dma_priority);
-
-#if IS_ENABLED(CONFIG_USB_OMAP)
-#ifdef CONFIG_ARCH_OMAP15XX
-/* Returns 1 if the DMA module is in OMAP1510-compatible mode, 0 otherwise */
-static int omap_dma_in_1510_mode(void)
-{
-	return enable_1510_mode;
-}
-#else
-#define omap_dma_in_1510_mode()		0
-#endif
-
-void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
-				  int frame_count, int sync_mode,
-				  int dma_trigger, int src_or_dst_synch)
-{
-	u32 l;
-	u16 ccr;
-
-	l = p->dma_read(CSDP, lch);
-	l &= ~0x03;
-	l |= data_type;
-	p->dma_write(l, CSDP, lch);
-
-	ccr = p->dma_read(CCR, lch);
-	ccr &= ~(1 << 5);
-	if (sync_mode == OMAP_DMA_SYNC_FRAME)
-		ccr |= 1 << 5;
-	p->dma_write(ccr, CCR, lch);
-
-	ccr = p->dma_read(CCR2, lch);
-	ccr &= ~(1 << 2);
-	if (sync_mode == OMAP_DMA_SYNC_BLOCK)
-		ccr |= 1 << 2;
-	p->dma_write(ccr, CCR2, lch);
-	p->dma_write(elem_count, CEN, lch);
-	p->dma_write(frame_count, CFN, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_transfer_params);
-
-void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode)
-{
-	if (!dma_omap15xx()) {
-		u32 l;
-
-		l = p->dma_read(LCH_CTRL, lch);
-		l &= ~0x7;
-		l |= mode;
-		p->dma_write(l, LCH_CTRL, lch);
-	}
-}
-EXPORT_SYMBOL(omap_set_dma_channel_mode);
-
-/* Note that src_port is only for omap1 */
-void omap_set_dma_src_params(int lch, int src_port, int src_amode,
-			     unsigned long src_start,
-			     int src_ei, int src_fi)
-{
-	u32 l;
-	u16 w;
-
-	w = p->dma_read(CSDP, lch);
-	w &= ~(0x1f << 2);
-	w |= src_port << 2;
-	p->dma_write(w, CSDP, lch);
-
-	l = p->dma_read(CCR, lch);
-	l &= ~(0x03 << 12);
-	l |= src_amode << 12;
-	p->dma_write(l, CCR, lch);
-
-	p->dma_write(src_start, CSSA, lch);
-
-	p->dma_write(src_ei, CSEI, lch);
-	p->dma_write(src_fi, CSFI, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_src_params);
-
-void omap_set_dma_src_data_pack(int lch, int enable)
-{
-	u32 l;
-
-	l = p->dma_read(CSDP, lch);
-	l &= ~(1 << 6);
-	if (enable)
-		l |= (1 << 6);
-	p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_src_data_pack);
-
-void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
-{
-	unsigned int burst = 0;
-	u32 l;
-
-	l = p->dma_read(CSDP, lch);
-	l &= ~(0x03 << 7);
-
-	switch (burst_mode) {
-	case OMAP_DMA_DATA_BURST_DIS:
-		break;
-	case OMAP_DMA_DATA_BURST_4:
-		burst = 0x2;
-		break;
-	case OMAP_DMA_DATA_BURST_8:
-		/*
-		 * not supported by current hardware on OMAP1
-		 * w |= (0x03 << 7);
-		 */
-		fallthrough;
-	case OMAP_DMA_DATA_BURST_16:
-		/* OMAP1 don't support burst 16 */
-		fallthrough;
-	default:
-		BUG();
-	}
-
-	l |= (burst << 7);
-	p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_src_burst_mode);
-
-/* Note that dest_port is only for OMAP1 */
-void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
-			      unsigned long dest_start,
-			      int dst_ei, int dst_fi)
-{
-	u32 l;
-
-	l = p->dma_read(CSDP, lch);
-	l &= ~(0x1f << 9);
-	l |= dest_port << 9;
-	p->dma_write(l, CSDP, lch);
-
-	l = p->dma_read(CCR, lch);
-	l &= ~(0x03 << 14);
-	l |= dest_amode << 14;
-	p->dma_write(l, CCR, lch);
-
-	p->dma_write(dest_start, CDSA, lch);
-
-	p->dma_write(dst_ei, CDEI, lch);
-	p->dma_write(dst_fi, CDFI, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_dest_params);
-
-void omap_set_dma_dest_data_pack(int lch, int enable)
-{
-	u32 l;
-
-	l = p->dma_read(CSDP, lch);
-	l &= ~(1 << 13);
-	if (enable)
-		l |= 1 << 13;
-	p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_dest_data_pack);
-
-void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
-{
-	unsigned int burst = 0;
-	u32 l;
-
-	l = p->dma_read(CSDP, lch);
-	l &= ~(0x03 << 14);
-
-	switch (burst_mode) {
-	case OMAP_DMA_DATA_BURST_DIS:
-		break;
-	case OMAP_DMA_DATA_BURST_4:
-		burst = 0x2;
-		break;
-	case OMAP_DMA_DATA_BURST_8:
-		burst = 0x3;
-		break;
-	case OMAP_DMA_DATA_BURST_16:
-		/* OMAP1 don't support burst 16 */
-		fallthrough;
-	default:
-		printk(KERN_ERR "Invalid DMA burst mode\n");
-		BUG();
-		return;
-	}
-	l |= (burst << 14);
-	p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
-
-static inline void omap_enable_channel_irq(int lch)
-{
-	/* Clear CSR */
-	p->dma_read(CSR, lch);
-
-	/* Enable some nice interrupts. */
-	p->dma_write(dma_chan[lch].enabled_irqs, CICR, lch);
-}
-
-void omap_disable_dma_irq(int lch, u16 bits)
-{
-	dma_chan[lch].enabled_irqs &= ~bits;
-}
-EXPORT_SYMBOL(omap_disable_dma_irq);
-
-static inline void enable_lnk(int lch)
-{
-	u32 l;
-
-	l = p->dma_read(CLNK_CTRL, lch);
-
-	l &= ~(1 << 14);
-
-	/* Set the ENABLE_LNK bits */
-	if (dma_chan[lch].next_lch != -1)
-		l = dma_chan[lch].next_lch | (1 << 15);
-
-	p->dma_write(l, CLNK_CTRL, lch);
-}
-
-static inline void disable_lnk(int lch)
-{
-	u32 l;
-
-	l = p->dma_read(CLNK_CTRL, lch);
-
-	/* Disable interrupts */
-	omap_disable_channel_irq(lch);
-
-	/* Set the STOP_LNK bit */
-	l |= 1 << 14;
-
-	p->dma_write(l, CLNK_CTRL, lch);
-	dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
-}
-#endif
-
-int omap_request_dma(int dev_id, const char *dev_name,
-		     void (*callback)(int lch, u16 ch_status, void *data),
-		     void *data, int *dma_ch_out)
-{
-	int ch, free_ch = -1;
-	unsigned long flags;
-	struct omap_dma_lch *chan;
-
-	WARN(strcmp(dev_name, "DMA engine"), "Using deprecated platform DMA API - please update to DMA engine");
-
-	spin_lock_irqsave(&dma_chan_lock, flags);
-	for (ch = 0; ch < dma_chan_count; ch++) {
-		if (free_ch == -1 && dma_chan[ch].dev_id == -1) {
-			free_ch = ch;
-			/* Exit after first free channel found */
-			break;
-		}
-	}
-	if (free_ch == -1) {
-		spin_unlock_irqrestore(&dma_chan_lock, flags);
-		return -EBUSY;
-	}
-	chan = dma_chan + free_ch;
-	chan->dev_id = dev_id;
-
-	if (p->clear_lch_regs)
-		p->clear_lch_regs(free_ch);
-
-	spin_unlock_irqrestore(&dma_chan_lock, flags);
-
-	chan->dev_name = dev_name;
-	chan->callback = callback;
-	chan->data = data;
-	chan->flags = 0;
-
-	chan->enabled_irqs = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
-
-	chan->enabled_irqs |= OMAP1_DMA_TOUT_IRQ;
-
-	if (dma_omap16xx()) {
-		/* If the sync device is set, configure it dynamically. */
-		if (dev_id != 0) {
-			set_gdma_dev(free_ch + 1, dev_id);
-			dev_id = free_ch + 1;
-		}
-		/*
-		 * Disable the 1510 compatibility mode and set the sync device
-		 * id.
-		 */
-		p->dma_write(dev_id | (1 << 10), CCR, free_ch);
-	} else {
-		p->dma_write(dev_id, CCR, free_ch);
-	}
-
-	*dma_ch_out = free_ch;
-
-	return 0;
-}
-EXPORT_SYMBOL(omap_request_dma);
-
-void omap_free_dma(int lch)
-{
-	unsigned long flags;
-
-	if (dma_chan[lch].dev_id == -1) {
-		pr_err("omap_dma: trying to free unallocated DMA channel %d\n",
-		       lch);
-		return;
-	}
-
-	/* Disable all DMA interrupts for the channel. */
-	omap_disable_channel_irq(lch);
-
-	/* Make sure the DMA transfer is stopped. */
-	p->dma_write(0, CCR, lch);
-
-	spin_lock_irqsave(&dma_chan_lock, flags);
-	dma_chan[lch].dev_id = -1;
-	dma_chan[lch].next_lch = -1;
-	dma_chan[lch].callback = NULL;
-	spin_unlock_irqrestore(&dma_chan_lock, flags);
-}
-EXPORT_SYMBOL(omap_free_dma);
-
-/*
- * Clears any DMA state so the DMA engine is ready to restart with new buffers
- * through omap_start_dma(). Any buffers in flight are discarded.
- */
-static void omap_clear_dma(int lch)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	p->clear_dma(lch);
-	local_irq_restore(flags);
-}
-
-#if IS_ENABLED(CONFIG_USB_OMAP)
-void omap_start_dma(int lch)
-{
-	u32 l;
-
-	/*
-	 * The CPC/CDAC register needs to be initialized to zero
-	 * before starting dma transfer.
-	 */
-	if (dma_omap15xx())
-		p->dma_write(0, CPC, lch);
-	else
-		p->dma_write(0, CDAC, lch);
-
-	if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
-		int next_lch, cur_lch;
-		char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
-
-		/* Set the link register of the first channel */
-		enable_lnk(lch);
-
-		memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
-		dma_chan_link_map[lch] = 1;
-
-		cur_lch = dma_chan[lch].next_lch;
-		do {
-			next_lch = dma_chan[cur_lch].next_lch;
-
-			/* The loop case: we've been here already */
-			if (dma_chan_link_map[cur_lch])
-				break;
-			/* Mark the current channel */
-			dma_chan_link_map[cur_lch] = 1;
-
-			enable_lnk(cur_lch);
-			omap_enable_channel_irq(cur_lch);
-
-			cur_lch = next_lch;
-		} while (next_lch != -1);
-	} else if (IS_DMA_ERRATA(DMA_ERRATA_PARALLEL_CHANNELS))
-		p->dma_write(lch, CLNK_CTRL, lch);
-
-	omap_enable_channel_irq(lch);
-
-	l = p->dma_read(CCR, lch);
-
-	if (IS_DMA_ERRATA(DMA_ERRATA_IFRAME_BUFFERING))
-			l |= OMAP_DMA_CCR_BUFFERING_DISABLE;
-	l |= OMAP_DMA_CCR_EN;
-
-	/*
-	 * As dma_write() uses IO accessors which are weakly ordered, there
-	 * is no guarantee that data in coherent DMA memory will be visible
-	 * to the DMA device.  Add a memory barrier here to ensure that any
-	 * such data is visible prior to enabling DMA.
-	 */
-	mb();
-	p->dma_write(l, CCR, lch);
-
-	dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
-}
-EXPORT_SYMBOL(omap_start_dma);
-
-void omap_stop_dma(int lch)
-{
-	u32 l;
-
-	/* Disable all interrupts on the channel */
-	omap_disable_channel_irq(lch);
-
-	l = p->dma_read(CCR, lch);
-	if (IS_DMA_ERRATA(DMA_ERRATA_i541) &&
-			(l & OMAP_DMA_CCR_SEL_SRC_DST_SYNC)) {
-		int i = 0;
-		u32 sys_cf;
-
-		/* Configure No-Standby */
-		l = p->dma_read(OCP_SYSCONFIG, lch);
-		sys_cf = l;
-		l &= ~DMA_SYSCONFIG_MIDLEMODE_MASK;
-		l |= DMA_SYSCONFIG_MIDLEMODE(DMA_IDLEMODE_NO_IDLE);
-		p->dma_write(l , OCP_SYSCONFIG, 0);
-
-		l = p->dma_read(CCR, lch);
-		l &= ~OMAP_DMA_CCR_EN;
-		p->dma_write(l, CCR, lch);
-
-		/* Wait for sDMA FIFO drain */
-		l = p->dma_read(CCR, lch);
-		while (i < 100 && (l & (OMAP_DMA_CCR_RD_ACTIVE |
-					OMAP_DMA_CCR_WR_ACTIVE))) {
-			udelay(5);
-			i++;
-			l = p->dma_read(CCR, lch);
-		}
-		if (i >= 100)
-			pr_err("DMA drain did not complete on lch %d\n", lch);
-		/* Restore OCP_SYSCONFIG */
-		p->dma_write(sys_cf, OCP_SYSCONFIG, lch);
-	} else {
-		l &= ~OMAP_DMA_CCR_EN;
-		p->dma_write(l, CCR, lch);
-	}
-
-	/*
-	 * Ensure that data transferred by DMA is visible to any access
-	 * after DMA has been disabled.  This is important for coherent
-	 * DMA regions.
-	 */
-	mb();
-
-	if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
-		int next_lch, cur_lch = lch;
-		char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
-
-		memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
-		do {
-			/* The loop case: we've been here already */
-			if (dma_chan_link_map[cur_lch])
-				break;
-			/* Mark the current channel */
-			dma_chan_link_map[cur_lch] = 1;
-
-			disable_lnk(cur_lch);
-
-			next_lch = dma_chan[cur_lch].next_lch;
-			cur_lch = next_lch;
-		} while (next_lch != -1);
-	}
-
-	dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
-}
-EXPORT_SYMBOL(omap_stop_dma);
-
-/*
- * Allows changing the DMA callback function or data. This may be needed if
- * the driver shares a single DMA channel for multiple dma triggers.
- */
-/*
- * Returns current physical source address for the given DMA channel.
- * If the channel is running the caller must disable interrupts prior calling
- * this function and process the returned value before re-enabling interrupt to
- * prevent races with the interrupt handler. Note that in continuous mode there
- * is a chance for CSSA_L register overflow between the two reads resulting
- * in incorrect return value.
- */
-dma_addr_t omap_get_dma_src_pos(int lch)
-{
-	dma_addr_t offset = 0;
-
-	if (dma_omap15xx())
-		offset = p->dma_read(CPC, lch);
-	else
-		offset = p->dma_read(CSAC, lch);
-
-	if (IS_DMA_ERRATA(DMA_ERRATA_3_3) && offset == 0)
-		offset = p->dma_read(CSAC, lch);
-
-	if (!dma_omap15xx()) {
-		/*
-		 * CDAC == 0 indicates that the DMA transfer on the channel has
-		 * not been started (no data has been transferred so far).
-		 * Return the programmed source start address in this case.
-		 */
-		if (likely(p->dma_read(CDAC, lch)))
-			offset = p->dma_read(CSAC, lch);
-		else
-			offset = p->dma_read(CSSA, lch);
-	}
-
-	offset |= (p->dma_read(CSSA, lch) & 0xFFFF0000);
-
-	return offset;
-}
-EXPORT_SYMBOL(omap_get_dma_src_pos);
-
-/*
- * Returns current physical destination address for the given DMA channel.
- * If the channel is running the caller must disable interrupts prior calling
- * this function and process the returned value before re-enabling interrupt to
- * prevent races with the interrupt handler. Note that in continuous mode there
- * is a chance for CDSA_L register overflow between the two reads resulting
- * in incorrect return value.
- */
-dma_addr_t omap_get_dma_dst_pos(int lch)
-{
-	dma_addr_t offset = 0;
-
-	if (dma_omap15xx())
-		offset = p->dma_read(CPC, lch);
-	else
-		offset = p->dma_read(CDAC, lch);
-
-	/*
-	 * omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
-	 * read before the DMA controller finished disabling the channel.
-	 */
-	if (!dma_omap15xx() && offset == 0) {
-		offset = p->dma_read(CDAC, lch);
-		/*
-		 * CDAC == 0 indicates that the DMA transfer on the channel has
-		 * not been started (no data has been transferred so far).
-		 * Return the programmed destination start address in this case.
-		 */
-		if (unlikely(!offset))
-			offset = p->dma_read(CDSA, lch);
-	}
-
-	offset |= (p->dma_read(CDSA, lch) & 0xFFFF0000);
-
-	return offset;
-}
-EXPORT_SYMBOL(omap_get_dma_dst_pos);
-
-int omap_get_dma_active_status(int lch)
-{
-	return (p->dma_read(CCR, lch) & OMAP_DMA_CCR_EN) != 0;
-}
-EXPORT_SYMBOL(omap_get_dma_active_status);
-#endif
-
-int omap_dma_running(void)
-{
-	int lch;
-
-	if (omap_lcd_dma_running())
-		return 1;
-
-	for (lch = 0; lch < dma_chan_count; lch++)
-		if (p->dma_read(CCR, lch) & OMAP_DMA_CCR_EN)
-			return 1;
-
-	return 0;
-}
-
-/*----------------------------------------------------------------------------*/
-
-static int omap1_dma_handle_ch(int ch)
-{
-	u32 csr;
-
-	if (enable_1510_mode && ch >= 6) {
-		csr = dma_chan[ch].saved_csr;
-		dma_chan[ch].saved_csr = 0;
-	} else
-		csr = p->dma_read(CSR, ch);
-	if (enable_1510_mode && ch <= 2 && (csr >> 7) != 0) {
-		dma_chan[ch + 6].saved_csr = csr >> 7;
-		csr &= 0x7f;
-	}
-	if ((csr & 0x3f) == 0)
-		return 0;
-	if (unlikely(dma_chan[ch].dev_id == -1)) {
-		pr_warn("Spurious interrupt from DMA channel %d (CSR %04x)\n",
-			ch, csr);
-		return 0;
-	}
-	if (unlikely(csr & OMAP1_DMA_TOUT_IRQ))
-		pr_warn("DMA timeout with device %d\n", dma_chan[ch].dev_id);
-	if (unlikely(csr & OMAP_DMA_DROP_IRQ))
-		pr_warn("DMA synchronization event drop occurred with device %d\n",
-			dma_chan[ch].dev_id);
-	if (likely(csr & OMAP_DMA_BLOCK_IRQ))
-		dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
-	if (likely(dma_chan[ch].callback != NULL))
-		dma_chan[ch].callback(ch, csr, dma_chan[ch].data);
-
-	return 1;
-}
-
-static irqreturn_t omap1_dma_irq_handler(int irq, void *dev_id)
-{
-	int ch = ((int) dev_id) - 1;
-	int handled = 0;
-
-	for (;;) {
-		int handled_now = 0;
-
-		handled_now += omap1_dma_handle_ch(ch);
-		if (enable_1510_mode && dma_chan[ch + 6].saved_csr)
-			handled_now += omap1_dma_handle_ch(ch + 6);
-		if (!handled_now)
-			break;
-		handled += handled_now;
-	}
-
-	return handled ? IRQ_HANDLED : IRQ_NONE;
-}
-
-struct omap_system_dma_plat_info *omap_get_plat_info(void)
-{
-	return p;
-}
-EXPORT_SYMBOL_GPL(omap_get_plat_info);
-
-static int omap_system_dma_probe(struct platform_device *pdev)
-{
-	int ch, ret = 0;
-	int dma_irq;
-	char irq_name[4];
-
-	p = pdev->dev.platform_data;
-	if (!p) {
-		dev_err(&pdev->dev,
-			"%s: System DMA initialized without platform data\n",
-			__func__);
-		return -EINVAL;
-	}
-
-	d			= p->dma_attr;
-	errata			= p->errata;
-
-	if ((d->dev_caps & RESERVE_CHANNEL) && omap_dma_reserve_channels
-			&& (omap_dma_reserve_channels < d->lch_count))
-		d->lch_count	= omap_dma_reserve_channels;
-
-	dma_lch_count		= d->lch_count;
-	dma_chan_count		= dma_lch_count;
-	enable_1510_mode	= d->dev_caps & ENABLE_1510_MODE;
-
-	dma_chan = devm_kcalloc(&pdev->dev, dma_lch_count,
-				sizeof(*dma_chan), GFP_KERNEL);
-	if (!dma_chan)
-		return -ENOMEM;
-
-	for (ch = 0; ch < dma_chan_count; ch++) {
-		omap_clear_dma(ch);
-
-		dma_chan[ch].dev_id = -1;
-		dma_chan[ch].next_lch = -1;
-
-		if (ch >= 6 && enable_1510_mode)
-			continue;
-
-		/*
-		 * request_irq() doesn't like dev_id (ie. ch) being
-		 * zero, so we have to kludge around this.
-		 */
-		sprintf(&irq_name[0], "%d", ch);
-		dma_irq = platform_get_irq_byname(pdev, irq_name);
-
-		if (dma_irq < 0) {
-			ret = dma_irq;
-			goto exit_dma_irq_fail;
-		}
-
-		/* INT_DMA_LCD is handled in lcd_dma.c */
-		if (dma_irq == INT_DMA_LCD)
-			continue;
-
-		ret = request_irq(dma_irq,
-				omap1_dma_irq_handler, 0, "DMA",
-				(void *) (ch + 1));
-		if (ret != 0)
-			goto exit_dma_irq_fail;
-	}
-
-	/* reserve dma channels 0 and 1 in high security devices on 34xx */
-	if (d->dev_caps & HS_CHANNELS_RESERVED) {
-		pr_info("Reserving DMA channels 0 and 1 for HS ROM code\n");
-		dma_chan[0].dev_id = 0;
-		dma_chan[1].dev_id = 1;
-	}
-	p->show_dma_caps();
-	return 0;
-
-exit_dma_irq_fail:
-	return ret;
-}
-
-static int omap_system_dma_remove(struct platform_device *pdev)
-{
-	int dma_irq, irq_rel = 0;
-
-	for ( ; irq_rel < dma_chan_count; irq_rel++) {
-		dma_irq = platform_get_irq(pdev, irq_rel);
-		free_irq(dma_irq, (void *)(irq_rel + 1));
-	}
-
-	return 0;
-}
-
-static struct platform_driver omap_system_dma_driver = {
-	.probe		= omap_system_dma_probe,
-	.remove		= omap_system_dma_remove,
-	.driver		= {
-		.name	= "omap_dma_system"
-	},
-};
-
-static int __init omap_system_dma_init(void)
-{
-	return platform_driver_register(&omap_system_dma_driver);
-}
-arch_initcall(omap_system_dma_init);
-
-static void __exit omap_system_dma_exit(void)
-{
-	platform_driver_unregister(&omap_system_dma_driver);
-}
-
-MODULE_DESCRIPTION("OMAP SYSTEM DMA DRIVER");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Texas Instruments Inc");
-
-/*
- * Reserve the omap SDMA channels using cmdline bootarg
- * "omap_dma_reserve_ch=". The valid range is 1 to 32
- */
-static int __init omap_dma_cmdline_reserve_ch(char *str)
-{
-	if (get_option(&str, &omap_dma_reserve_channels) != 1)
-		omap_dma_reserve_channels = 0;
-	return 1;
-}
-
-__setup("omap_dma_reserve_ch=", omap_dma_cmdline_reserve_ch);
-
-