ARM: mach-pnx4008: Remove architecture

This patch removes the ARM architecture mach-pnx4008. No direct support or user
feedback since 2006. Acknowledgements from NXP/Philips and Linux arm-soc
maintainers.

Signed-off-by: Roland Stigge <stigge@antcom.de>

1 files changed, 0 insertions, 1105 deletions

diff --git a/arch/arm/mach-pnx4008/dma.c b/arch/arm/mach-pnx4008/dma.c
deleted file mode 100644
index a4739e9fb2fb..000000000000
--- a/arch/arm/mach-pnx4008/dma.c
+++ /dev/null
@@ -1,1105 +0,0 @@
-/*
- *  linux/arch/arm/mach-pnx4008/dma.c
- *
- *  PNX4008 DMA registration and IRQ dispatching
- *
- *  Author:	Vitaly Wool
- *  Copyright:	MontaVista Software Inc. (c) 2005
- *
- *  Based on the code from Nicolas Pitre
- *
- *  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/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/dma-mapping.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/gfp.h>
-
-#include <mach/hardware.h>
-#include <mach/dma.h>
-#include <asm/dma-mapping.h>
-#include <mach/clock.h>
-
-static struct dma_channel {
-	char *name;
-	void (*irq_handler) (int, int, void *);
-	void *data;
-	struct pnx4008_dma_ll *ll;
-	u32 ll_dma;
-	void *target_addr;
-	int target_id;
-} dma_channels[MAX_DMA_CHANNELS];
-
-static struct ll_pool {
-	void *vaddr;
-	void *cur;
-	dma_addr_t dma_addr;
-	int count;
-} ll_pool;
-
-static DEFINE_SPINLOCK(ll_lock);
-
-struct pnx4008_dma_ll *pnx4008_alloc_ll_entry(dma_addr_t * ll_dma)
-{
-	struct pnx4008_dma_ll *ll = NULL;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ll_lock, flags);
-	if (ll_pool.count > 4) { /* can give one more */
-		ll = *(struct pnx4008_dma_ll **) ll_pool.cur;
-		*ll_dma = ll_pool.dma_addr + ((void *)ll - ll_pool.vaddr);
-		*(void **)ll_pool.cur = **(void ***)ll_pool.cur;
-		memset(ll, 0, sizeof(*ll));
-		ll_pool.count--;
-	}
-	spin_unlock_irqrestore(&ll_lock, flags);
-
-	return ll;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_alloc_ll_entry);
-
-void pnx4008_free_ll_entry(struct pnx4008_dma_ll * ll, dma_addr_t ll_dma)
-{
-	unsigned long flags;
-
-	if (ll) {
-		if ((unsigned long)((long)ll - (long)ll_pool.vaddr) > 0x4000) {
-			printk(KERN_ERR "Trying to free entry not allocated by DMA\n");
-			BUG();
-		}
-
-		if (ll->flags & DMA_BUFFER_ALLOCATED)
-			ll->free(ll->alloc_data);
-
-		spin_lock_irqsave(&ll_lock, flags);
-		*(long *)ll = *(long *)ll_pool.cur;
-		*(long *)ll_pool.cur = (long)ll;
-		ll_pool.count++;
-		spin_unlock_irqrestore(&ll_lock, flags);
-	}
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_free_ll_entry);
-
-void pnx4008_free_ll(u32 ll_dma, struct pnx4008_dma_ll * ll)
-{
-	struct pnx4008_dma_ll *ptr;
-	u32 dma;
-
-	while (ll) {
-		dma = ll->next_dma;
-		ptr = ll->next;
-		pnx4008_free_ll_entry(ll, ll_dma);
-
-		ll_dma = dma;
-		ll = ptr;
-	}
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_free_ll);
-
-static int dma_channels_requested = 0;
-
-static inline void dma_increment_usage(void)
-{
-	if (!dma_channels_requested++) {
-		struct clk *clk = clk_get(0, "dma_ck");
-		if (!IS_ERR(clk)) {
-			clk_set_rate(clk, 1);
-			clk_put(clk);
-		}
-		pnx4008_config_dma(-1, -1, 1);
-	}
-}
-static inline void dma_decrement_usage(void)
-{
-	if (!--dma_channels_requested) {
-		struct clk *clk = clk_get(0, "dma_ck");
-		if (!IS_ERR(clk)) {
-			clk_set_rate(clk, 0);
-			clk_put(clk);
-		}
-		pnx4008_config_dma(-1, -1, 0);
-
-	}
-}
-
-static DEFINE_SPINLOCK(dma_lock);
-
-static inline void pnx4008_dma_lock(void)
-{
-	spin_lock_irq(&dma_lock);
-}
-
-static inline void pnx4008_dma_unlock(void)
-{
-	spin_unlock_irq(&dma_lock);
-}
-
-#define VALID_CHANNEL(c)	(((c) >= 0) && ((c) < MAX_DMA_CHANNELS))
-
-int pnx4008_request_channel(char *name, int ch,
-			    void (*irq_handler) (int, int, void *), void *data)
-{
-	int i, found = 0;
-
-	/* basic sanity checks */
-	if (!name || (ch != -1 && !VALID_CHANNEL(ch)))
-		return -EINVAL;
-
-	pnx4008_dma_lock();
-
-	/* try grabbing a DMA channel with the requested priority */
-	for (i = MAX_DMA_CHANNELS - 1; i >= 0; i--) {
-		if (!dma_channels[i].name && (ch == -1 || ch == i)) {
-			found = 1;
-			break;
-		}
-	}
-
-	if (found) {
-		dma_increment_usage();
-		dma_channels[i].name = name;
-		dma_channels[i].irq_handler = irq_handler;
-		dma_channels[i].data = data;
-		dma_channels[i].ll = NULL;
-		dma_channels[i].ll_dma = 0;
-	} else {
-		printk(KERN_WARNING "No more available DMA channels for %s\n",
-		       name);
-		i = -ENODEV;
-	}
-
-	pnx4008_dma_unlock();
-	return i;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_request_channel);
-
-void pnx4008_free_channel(int ch)
-{
-	if (!dma_channels[ch].name) {
-		printk(KERN_CRIT
-		       "%s: trying to free channel %d which is already freed\n",
-		       __func__, ch);
-		return;
-	}
-
-	pnx4008_dma_lock();
-	pnx4008_free_ll(dma_channels[ch].ll_dma, dma_channels[ch].ll);
-	dma_channels[ch].ll = NULL;
-	dma_decrement_usage();
-
-	dma_channels[ch].name = NULL;
-	pnx4008_dma_unlock();
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_free_channel);
-
-int pnx4008_config_dma(int ahb_m1_be, int ahb_m2_be, int enable)
-{
-	unsigned long dma_cfg = __raw_readl(DMAC_CONFIG);
-
-	switch (ahb_m1_be) {
-	case 0:
-		dma_cfg &= ~(1 << 1);
-		break;
-	case 1:
-		dma_cfg |= (1 << 1);
-		break;
-	default:
-		break;
-	}
-
-	switch (ahb_m2_be) {
-	case 0:
-		dma_cfg &= ~(1 << 2);
-		break;
-	case 1:
-		dma_cfg |= (1 << 2);
-		break;
-	default:
-		break;
-	}
-
-	switch (enable) {
-	case 0:
-		dma_cfg &= ~(1 << 0);
-		break;
-	case 1:
-		dma_cfg |= (1 << 0);
-		break;
-	default:
-		break;
-	}
-
-	pnx4008_dma_lock();
-	__raw_writel(dma_cfg, DMAC_CONFIG);
-	pnx4008_dma_unlock();
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_config_dma);
-
-int pnx4008_dma_pack_control(const struct pnx4008_dma_ch_ctrl * ch_ctrl,
-			     unsigned long *ctrl)
-{
-	int i = 0, dbsize, sbsize, err = 0;
-
-	if (!ctrl || !ch_ctrl) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	*ctrl = 0;
-
-	switch (ch_ctrl->tc_mask) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 31);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-
-	switch (ch_ctrl->cacheable) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 30);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->bufferable) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 29);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->priv_mode) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 28);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->di) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 27);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->si) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 26);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->dest_ahb1) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 25);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->src_ahb1) {
-	case 0:
-		break;
-	case 1:
-		*ctrl |= (1 << 24);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->dwidth) {
-	case WIDTH_BYTE:
-		*ctrl &= ~(7 << 21);
-		break;
-	case WIDTH_HWORD:
-		*ctrl &= ~(7 << 21);
-		*ctrl |= (1 << 21);
-		break;
-	case WIDTH_WORD:
-		*ctrl &= ~(7 << 21);
-		*ctrl |= (2 << 21);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_ctrl->swidth) {
-	case WIDTH_BYTE:
-		*ctrl &= ~(7 << 18);
-		break;
-	case WIDTH_HWORD:
-		*ctrl &= ~(7 << 18);
-		*ctrl |= (1 << 18);
-		break;
-	case WIDTH_WORD:
-		*ctrl &= ~(7 << 18);
-		*ctrl |= (2 << 18);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	dbsize = ch_ctrl->dbsize;
-	while (!(dbsize & 1)) {
-		i++;
-		dbsize >>= 1;
-	}
-	if (ch_ctrl->dbsize != 1 || i > 8 || i == 1) {
-		err = -EINVAL;
-		goto out;
-	} else if (i > 1)
-		i--;
-	*ctrl &= ~(7 << 15);
-	*ctrl |= (i << 15);
-
-	sbsize = ch_ctrl->sbsize;
-	while (!(sbsize & 1)) {
-		i++;
-		sbsize >>= 1;
-	}
-	if (ch_ctrl->sbsize != 1 || i > 8 || i == 1) {
-		err = -EINVAL;
-		goto out;
-	} else if (i > 1)
-		i--;
-	*ctrl &= ~(7 << 12);
-	*ctrl |= (i << 12);
-
-	if (ch_ctrl->tr_size > 0x7ff) {
-		err = -E2BIG;
-		goto out;
-	}
-	*ctrl &= ~0x7ff;
-	*ctrl |= ch_ctrl->tr_size & 0x7ff;
-
-out:
-	return err;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_pack_control);
-
-int pnx4008_dma_parse_control(unsigned long ctrl,
-			      struct pnx4008_dma_ch_ctrl * ch_ctrl)
-{
-	int err = 0;
-
-	if (!ch_ctrl) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	ch_ctrl->tr_size = ctrl & 0x7ff;
-	ctrl >>= 12;
-
-	ch_ctrl->sbsize = 1 << (ctrl & 7);
-	if (ch_ctrl->sbsize > 1)
-		ch_ctrl->sbsize <<= 1;
-	ctrl >>= 3;
-
-	ch_ctrl->dbsize = 1 << (ctrl & 7);
-	if (ch_ctrl->dbsize > 1)
-		ch_ctrl->dbsize <<= 1;
-	ctrl >>= 3;
-
-	switch (ctrl & 7) {
-	case 0:
-		ch_ctrl->swidth = WIDTH_BYTE;
-		break;
-	case 1:
-		ch_ctrl->swidth = WIDTH_HWORD;
-		break;
-	case 2:
-		ch_ctrl->swidth = WIDTH_WORD;
-		break;
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	ctrl >>= 3;
-
-	switch (ctrl & 7) {
-	case 0:
-		ch_ctrl->dwidth = WIDTH_BYTE;
-		break;
-	case 1:
-		ch_ctrl->dwidth = WIDTH_HWORD;
-		break;
-	case 2:
-		ch_ctrl->dwidth = WIDTH_WORD;
-		break;
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	ctrl >>= 3;
-
-	ch_ctrl->src_ahb1 = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->dest_ahb1 = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->si = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->di = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->priv_mode = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->bufferable = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->cacheable = ctrl & 1;
-	ctrl >>= 1;
-
-	ch_ctrl->tc_mask = ctrl & 1;
-
-out:
-	return err;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_parse_control);
-
-int pnx4008_dma_pack_config(const struct pnx4008_dma_ch_config * ch_cfg,
-			    unsigned long *cfg)
-{
-	int err = 0;
-
-	if (!cfg || !ch_cfg) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	*cfg = 0;
-
-	switch (ch_cfg->halt) {
-	case 0:
-		break;
-	case 1:
-		*cfg |= (1 << 18);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_cfg->active) {
-	case 0:
-		break;
-	case 1:
-		*cfg |= (1 << 17);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_cfg->lock) {
-	case 0:
-		break;
-	case 1:
-		*cfg |= (1 << 16);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_cfg->itc) {
-	case 0:
-		break;
-	case 1:
-		*cfg |= (1 << 15);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_cfg->ie) {
-	case 0:
-		break;
-	case 1:
-		*cfg |= (1 << 14);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	switch (ch_cfg->flow_cntrl) {
-	case FC_MEM2MEM_DMA:
-		*cfg &= ~(7 << 11);
-		break;
-	case FC_MEM2PER_DMA:
-		*cfg &= ~(7 << 11);
-		*cfg |= (1 << 11);
-		break;
-	case FC_PER2MEM_DMA:
-		*cfg &= ~(7 << 11);
-		*cfg |= (2 << 11);
-		break;
-	case FC_PER2PER_DMA:
-		*cfg &= ~(7 << 11);
-		*cfg |= (3 << 11);
-		break;
-	case FC_PER2PER_DPER:
-		*cfg &= ~(7 << 11);
-		*cfg |= (4 << 11);
-		break;
-	case FC_MEM2PER_PER:
-		*cfg &= ~(7 << 11);
-		*cfg |= (5 << 11);
-		break;
-	case FC_PER2MEM_PER:
-		*cfg &= ~(7 << 11);
-		*cfg |= (6 << 11);
-		break;
-	case FC_PER2PER_SPER:
-		*cfg |= (7 << 11);
-		break;
-
-	default:
-		err = -EINVAL;
-		goto out;
-	}
-	*cfg &= ~(0x1f << 6);
-	*cfg |= ((ch_cfg->dest_per & 0x1f) << 6);
-
-	*cfg &= ~(0x1f << 1);
-	*cfg |= ((ch_cfg->src_per & 0x1f) << 1);
-
-out:
-	return err;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_pack_config);
-
-int pnx4008_dma_parse_config(unsigned long cfg,
-			     struct pnx4008_dma_ch_config * ch_cfg)
-{
-	int err = 0;
-
-	if (!ch_cfg) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	cfg >>= 1;
-
-	ch_cfg->src_per = cfg & 0x1f;
-	cfg >>= 5;
-
-	ch_cfg->dest_per = cfg & 0x1f;
-	cfg >>= 5;
-
-	switch (cfg & 7) {
-	case 0:
-		ch_cfg->flow_cntrl = FC_MEM2MEM_DMA;
-		break;
-	case 1:
-		ch_cfg->flow_cntrl = FC_MEM2PER_DMA;
-		break;
-	case 2:
-		ch_cfg->flow_cntrl = FC_PER2MEM_DMA;
-		break;
-	case 3:
-		ch_cfg->flow_cntrl = FC_PER2PER_DMA;
-		break;
-	case 4:
-		ch_cfg->flow_cntrl = FC_PER2PER_DPER;
-		break;
-	case 5:
-		ch_cfg->flow_cntrl = FC_MEM2PER_PER;
-		break;
-	case 6:
-		ch_cfg->flow_cntrl = FC_PER2MEM_PER;
-		break;
-	case 7:
-		ch_cfg->flow_cntrl = FC_PER2PER_SPER;
-	}
-	cfg >>= 3;
-
-	ch_cfg->ie = cfg & 1;
-	cfg >>= 1;
-
-	ch_cfg->itc = cfg & 1;
-	cfg >>= 1;
-
-	ch_cfg->lock = cfg & 1;
-	cfg >>= 1;
-
-	ch_cfg->active = cfg & 1;
-	cfg >>= 1;
-
-	ch_cfg->halt = cfg & 1;
-
-out:
-	return err;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_parse_config);
-
-void pnx4008_dma_split_head_entry(struct pnx4008_dma_config * config,
-				  struct pnx4008_dma_ch_ctrl * ctrl)
-{
-	int new_len = ctrl->tr_size, num_entries = 0;
-	int old_len = new_len;
-	int src_width, dest_width, count = 1;
-
-	switch (ctrl->swidth) {
-	case WIDTH_BYTE:
-		src_width = 1;
-		break;
-	case WIDTH_HWORD:
-		src_width = 2;
-		break;
-	case WIDTH_WORD:
-		src_width = 4;
-		break;
-	default:
-		return;
-	}
-
-	switch (ctrl->dwidth) {
-	case WIDTH_BYTE:
-		dest_width = 1;
-		break;
-	case WIDTH_HWORD:
-		dest_width = 2;
-		break;
-	case WIDTH_WORD:
-		dest_width = 4;
-		break;
-	default:
-		return;
-	}
-
-	while (new_len > 0x7FF) {
-		num_entries++;
-		new_len = (ctrl->tr_size + num_entries) / (num_entries + 1);
-	}
-	if (num_entries != 0) {
-		struct pnx4008_dma_ll *ll = NULL;
-		config->ch_ctrl &= ~0x7ff;
-		config->ch_ctrl |= new_len;
-		if (!config->is_ll) {
-			config->is_ll = 1;
-			while (num_entries) {
-				if (!ll) {
-					config->ll =
-					    pnx4008_alloc_ll_entry(&config->
-								   ll_dma);
-					ll = config->ll;
-				} else {
-					ll->next =
-					    pnx4008_alloc_ll_entry(&ll->
-								   next_dma);
-					ll = ll->next;
-				}
-
-				if (ctrl->si)
-					ll->src_addr =
-					    config->src_addr +
-					    src_width * new_len * count;
-				else
-					ll->src_addr = config->src_addr;
-				if (ctrl->di)
-					ll->dest_addr =
-					    config->dest_addr +
-					    dest_width * new_len * count;
-				else
-					ll->dest_addr = config->dest_addr;
-				ll->ch_ctrl = config->ch_ctrl & 0x7fffffff;
-				ll->next_dma = 0;
-				ll->next = NULL;
-				num_entries--;
-				count++;
-			}
-		} else {
-			struct pnx4008_dma_ll *ll_old = config->ll;
-			unsigned long ll_dma_old = config->ll_dma;
-			while (num_entries) {
-				if (!ll) {
-					config->ll =
-					    pnx4008_alloc_ll_entry(&config->
-								   ll_dma);
-					ll = config->ll;
-				} else {
-					ll->next =
-					    pnx4008_alloc_ll_entry(&ll->
-								   next_dma);
-					ll = ll->next;
-				}
-
-				if (ctrl->si)
-					ll->src_addr =
-					    config->src_addr +
-					    src_width * new_len * count;
-				else
-					ll->src_addr = config->src_addr;
-				if (ctrl->di)
-					ll->dest_addr =
-					    config->dest_addr +
-					    dest_width * new_len * count;
-				else
-					ll->dest_addr = config->dest_addr;
-				ll->ch_ctrl = config->ch_ctrl & 0x7fffffff;
-				ll->next_dma = 0;
-				ll->next = NULL;
-				num_entries--;
-				count++;
-			}
-			ll->next_dma = ll_dma_old;
-			ll->next = ll_old;
-		}
-		/* adjust last length/tc */
-		ll->ch_ctrl = config->ch_ctrl & (~0x7ff);
-		ll->ch_ctrl |= old_len - new_len * (count - 1);
-		config->ch_ctrl &= 0x7fffffff;
-	}
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_split_head_entry);
-
-void pnx4008_dma_split_ll_entry(struct pnx4008_dma_ll * cur_ll,
-				struct pnx4008_dma_ch_ctrl * ctrl)
-{
-	int new_len = ctrl->tr_size, num_entries = 0;
-	int old_len = new_len;
-	int src_width, dest_width, count = 1;
-
-	switch (ctrl->swidth) {
-	case WIDTH_BYTE:
-		src_width = 1;
-		break;
-	case WIDTH_HWORD:
-		src_width = 2;
-		break;
-	case WIDTH_WORD:
-		src_width = 4;
-		break;
-	default:
-		return;
-	}
-
-	switch (ctrl->dwidth) {
-	case WIDTH_BYTE:
-		dest_width = 1;
-		break;
-	case WIDTH_HWORD:
-		dest_width = 2;
-		break;
-	case WIDTH_WORD:
-		dest_width = 4;
-		break;
-	default:
-		return;
-	}
-
-	while (new_len > 0x7FF) {
-		num_entries++;
-		new_len = (ctrl->tr_size + num_entries) / (num_entries + 1);
-	}
-	if (num_entries != 0) {
-		struct pnx4008_dma_ll *ll = NULL;
-		cur_ll->ch_ctrl &= ~0x7ff;
-		cur_ll->ch_ctrl |= new_len;
-		if (!cur_ll->next) {
-			while (num_entries) {
-				if (!ll) {
-					cur_ll->next =
-					    pnx4008_alloc_ll_entry(&cur_ll->
-								   next_dma);
-					ll = cur_ll->next;
-				} else {
-					ll->next =
-					    pnx4008_alloc_ll_entry(&ll->
-								   next_dma);
-					ll = ll->next;
-				}
-
-				if (ctrl->si)
-					ll->src_addr =
-					    cur_ll->src_addr +
-					    src_width * new_len * count;
-				else
-					ll->src_addr = cur_ll->src_addr;
-				if (ctrl->di)
-					ll->dest_addr =
-					    cur_ll->dest_addr +
-					    dest_width * new_len * count;
-				else
-					ll->dest_addr = cur_ll->dest_addr;
-				ll->ch_ctrl = cur_ll->ch_ctrl & 0x7fffffff;
-				ll->next_dma = 0;
-				ll->next = NULL;
-				num_entries--;
-				count++;
-			}
-		} else {
-			struct pnx4008_dma_ll *ll_old = cur_ll->next;
-			unsigned long ll_dma_old = cur_ll->next_dma;
-			while (num_entries) {
-				if (!ll) {
-					cur_ll->next =
-					    pnx4008_alloc_ll_entry(&cur_ll->
-								   next_dma);
-					ll = cur_ll->next;
-				} else {
-					ll->next =
-					    pnx4008_alloc_ll_entry(&ll->
-								   next_dma);
-					ll = ll->next;
-				}
-
-				if (ctrl->si)
-					ll->src_addr =
-					    cur_ll->src_addr +
-					    src_width * new_len * count;
-				else
-					ll->src_addr = cur_ll->src_addr;
-				if (ctrl->di)
-					ll->dest_addr =
-					    cur_ll->dest_addr +
-					    dest_width * new_len * count;
-				else
-					ll->dest_addr = cur_ll->dest_addr;
-				ll->ch_ctrl = cur_ll->ch_ctrl & 0x7fffffff;
-				ll->next_dma = 0;
-				ll->next = NULL;
-				num_entries--;
-				count++;
-			}
-
-			ll->next_dma = ll_dma_old;
-			ll->next = ll_old;
-		}
-		/* adjust last length/tc */
-		ll->ch_ctrl = cur_ll->ch_ctrl & (~0x7ff);
-		ll->ch_ctrl |= old_len - new_len * (count - 1);
-		cur_ll->ch_ctrl &= 0x7fffffff;
-	}
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_split_ll_entry);
-
-int pnx4008_config_channel(int ch, struct pnx4008_dma_config * config)
-{
-	if (!VALID_CHANNEL(ch) || !dma_channels[ch].name)
-		return -EINVAL;
-
-	pnx4008_dma_lock();
-	__raw_writel(config->src_addr, DMAC_Cx_SRC_ADDR(ch));
-	__raw_writel(config->dest_addr, DMAC_Cx_DEST_ADDR(ch));
-
-	if (config->is_ll)
-		__raw_writel(config->ll_dma, DMAC_Cx_LLI(ch));
-	else
-		__raw_writel(0, DMAC_Cx_LLI(ch));
-
-	__raw_writel(config->ch_ctrl, DMAC_Cx_CONTROL(ch));
-	__raw_writel(config->ch_cfg, DMAC_Cx_CONFIG(ch));
-	pnx4008_dma_unlock();
-
-	return 0;
-
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_config_channel);
-
-int pnx4008_channel_get_config(int ch, struct pnx4008_dma_config * config)
-{
-	if (!VALID_CHANNEL(ch) || !dma_channels[ch].name || !config)
-		return -EINVAL;
-
-	pnx4008_dma_lock();
-	config->ch_cfg = __raw_readl(DMAC_Cx_CONFIG(ch));
-	config->ch_ctrl = __raw_readl(DMAC_Cx_CONTROL(ch));
-
-	config->ll_dma = __raw_readl(DMAC_Cx_LLI(ch));
-	config->is_ll = config->ll_dma ? 1 : 0;
-
-	config->src_addr = __raw_readl(DMAC_Cx_SRC_ADDR(ch));
-	config->dest_addr = __raw_readl(DMAC_Cx_DEST_ADDR(ch));
-	pnx4008_dma_unlock();
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_channel_get_config);
-
-int pnx4008_dma_ch_enable(int ch)
-{
-	unsigned long ch_cfg;
-
-	if (!VALID_CHANNEL(ch) || !dma_channels[ch].name)
-		return -EINVAL;
-
-	pnx4008_dma_lock();
-	ch_cfg = __raw_readl(DMAC_Cx_CONFIG(ch));
-	ch_cfg |= 1;
-	__raw_writel(ch_cfg, DMAC_Cx_CONFIG(ch));
-	pnx4008_dma_unlock();
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_ch_enable);
-
-int pnx4008_dma_ch_disable(int ch)
-{
-	unsigned long ch_cfg;
-
-	if (!VALID_CHANNEL(ch) || !dma_channels[ch].name)
-		return -EINVAL;
-
-	pnx4008_dma_lock();
-	ch_cfg = __raw_readl(DMAC_Cx_CONFIG(ch));
-	ch_cfg &= ~1;
-	__raw_writel(ch_cfg, DMAC_Cx_CONFIG(ch));
-	pnx4008_dma_unlock();
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_ch_disable);
-
-int pnx4008_dma_ch_enabled(int ch)
-{
-	unsigned long ch_cfg;
-
-	if (!VALID_CHANNEL(ch) || !dma_channels[ch].name)
-		return -EINVAL;
-
-	pnx4008_dma_lock();
-	ch_cfg = __raw_readl(DMAC_Cx_CONFIG(ch));
-	pnx4008_dma_unlock();
-
-	return ch_cfg & 1;
-}
-
-EXPORT_SYMBOL_GPL(pnx4008_dma_ch_enabled);
-
-static irqreturn_t dma_irq_handler(int irq, void *dev_id)
-{
-	int i;
-	unsigned long dint = __raw_readl(DMAC_INT_STAT);
-	unsigned long tcint = __raw_readl(DMAC_INT_TC_STAT);
-	unsigned long eint = __raw_readl(DMAC_INT_ERR_STAT);
-	unsigned long i_bit;
-
-	for (i = MAX_DMA_CHANNELS - 1; i >= 0; i--) {
-		i_bit = 1 << i;
-		if (dint & i_bit) {
-			struct dma_channel *channel = &dma_channels[i];
-
-			if (channel->name && channel->irq_handler) {
-				int cause = 0;
-
-				if (eint & i_bit)
-					cause |= DMA_ERR_INT;
-				if (tcint & i_bit)
-					cause |= DMA_TC_INT;
-				channel->irq_handler(i, cause, channel->data);
-			} else {
-				/*
-				 * IRQ for an unregistered DMA channel
-				 */
-				printk(KERN_WARNING
-				       "spurious IRQ for DMA channel %d\n", i);
-			}
-			if (tcint & i_bit)
-				__raw_writel(i_bit, DMAC_INT_TC_CLEAR);
-			if (eint & i_bit)
-				__raw_writel(i_bit, DMAC_INT_ERR_CLEAR);
-		}
-	}
-	return IRQ_HANDLED;
-}
-
-static int __init pnx4008_dma_init(void)
-{
-	int ret, i;
-
-	ret = request_irq(DMA_INT, dma_irq_handler, 0, "DMA", NULL);
-	if (ret) {
-		printk(KERN_CRIT "Wow!  Can't register IRQ for DMA\n");
-		goto out;
-	}
-
-	ll_pool.count = 0x4000 / sizeof(struct pnx4008_dma_ll);
-	ll_pool.cur = ll_pool.vaddr =
-	    dma_alloc_coherent(NULL, ll_pool.count * sizeof(struct pnx4008_dma_ll),
-			       &ll_pool.dma_addr, GFP_KERNEL);
-
-	if (!ll_pool.vaddr) {
-		ret = -ENOMEM;
-		free_irq(DMA_INT, NULL);
-		goto out;
-	}
-
-	for (i = 0; i < ll_pool.count - 1; i++) {
-		void **addr = ll_pool.vaddr + i * sizeof(struct pnx4008_dma_ll);
-		*addr = (void *)addr + sizeof(struct pnx4008_dma_ll);
-	}
-	*(long *)(ll_pool.vaddr +
-		  (ll_pool.count - 1) * sizeof(struct pnx4008_dma_ll)) =
-	    (long)ll_pool.vaddr;
-
-	__raw_writel(1, DMAC_CONFIG);
-
-out:
-	return ret;
-}
-arch_initcall(pnx4008_dma_init);