[ARM] remove arch-imx

arch-imx is superseeded by the MXC architecture support.
This patch removes arch/arm/mach-imx from the kernel.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

32 files changed, 0 insertions, 3504 deletions

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
deleted file mode 100644
index cddd194ac6e..00000000000
--- a/arch/arm/mach-imx/Kconfig
+++ /dev/null
@@ -1,11 +0,0 @@
-menu "IMX Implementations"
-	depends on ARCH_IMX
-
-config ARCH_MX1ADS
-	bool "mx1ads"
-	depends on ARCH_IMX
-	select ISA
-	help
-	  Say Y here if you are using the Motorola MX1ADS board
-
-endmenu
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
deleted file mode 100644
index b047c7e795a..00000000000
--- a/arch/arm/mach-imx/Makefile
+++ /dev/null
@@ -1,18 +0,0 @@
-#
-# Makefile for the linux kernel.
-#
-
-# Object file lists.
-
-obj-y			+= irq.o time.o dma.o generic.o clock.o
-
-obj-$(CONFIG_CPU_FREQ_IMX)	+= cpufreq.o
-
-# Specific board support
-obj-$(CONFIG_ARCH_MX1ADS) += mx1ads.o
-
-# Support for blinky lights
-led-y := leds.o
-
-obj-$(CONFIG_LEDS)	+=  $(led-y)
-led-$(CONFIG_ARCH_MX1ADS) += leds-mx1ads.o
diff --git a/arch/arm/mach-imx/Makefile.boot b/arch/arm/mach-imx/Makefile.boot
deleted file mode 100644
index fd72ce5b808..00000000000
--- a/arch/arm/mach-imx/Makefile.boot
+++ /dev/null
@@ -1,2 +0,0 @@
-    zreladdr-$(CONFIG_ARCH_MX1ADS)	:= 0x08008000
-
diff --git a/arch/arm/mach-imx/clock.c b/arch/arm/mach-imx/clock.c
deleted file mode 100644
index cf332aeb942..00000000000
--- a/arch/arm/mach-imx/clock.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/*
- *  Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/math64.h>
-#include <linux/err.h>
-#include <linux/io.h>
-
-#include <mach/hardware.h>
-
-/*
- * Very simple approach: We can't disable clocks, so we do
- * not need refcounting
- */
-
-struct clk {
-	struct list_head node;
-	const char *name;
-	unsigned long (*get_rate)(void);
-};
-
-/*
- *  get the system pll clock in Hz
- *
- *                  mfi + mfn / (mfd +1)
- *  f = 2 * f_ref * --------------------
- *                        pd + 1
- */
-static unsigned long imx_decode_pll(unsigned int pll, u32 f_ref)
-{
-	unsigned long long ll;
-	unsigned long quot;
-
-	u32 mfi = (pll >> 10) & 0xf;
-	u32 mfn = pll & 0x3ff;
-	u32 mfd = (pll >> 16) & 0x3ff;
-	u32 pd =  (pll >> 26) & 0xf;
-
-	mfi = mfi <= 5 ? 5 : mfi;
-
-	ll = 2 * (unsigned long long)f_ref *
-		((mfi << 16) + (mfn << 16) / (mfd + 1));
-	quot = (pd + 1) * (1 << 16);
-	ll += quot / 2;
-	do_div(ll, quot);
-	return (unsigned long)ll;
-}
-
-static unsigned long imx_get_system_clk(void)
-{
-	u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
-
-	return imx_decode_pll(SPCTL0, f_ref);
-}
-
-static unsigned long imx_get_mcu_clk(void)
-{
-	return imx_decode_pll(MPCTL0, CLK32 * 512);
-}
-
-/*
- *  get peripheral clock 1 ( UART[12], Timer[12], PWM )
- */
-static unsigned long imx_get_perclk1(void)
-{
-	return imx_get_system_clk() / (((PCDR) & 0xf)+1);
-}
-
-/*
- *  get peripheral clock 2 ( LCD, SD, SPI[12] )
- */
-static unsigned long imx_get_perclk2(void)
-{
-	return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
-}
-
-/*
- *  get peripheral clock 3 ( SSI )
- */
-static unsigned long imx_get_perclk3(void)
-{
-	return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
-}
-
-/*
- *  get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
- */
-static unsigned long imx_get_hclk(void)
-{
-	return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
-}
-
-static struct clk clk_system_clk = {
-	.name = "system_clk",
-	.get_rate = imx_get_system_clk,
-};
-
-static struct clk clk_hclk = {
-	.name = "hclk",
-	.get_rate = imx_get_hclk,
-};
-
-static struct clk clk_mcu_clk = {
-	.name = "mcu_clk",
-	.get_rate = imx_get_mcu_clk,
-};
-
-static struct clk clk_perclk1 = {
-	.name = "perclk1",
-	.get_rate = imx_get_perclk1,
-};
-
-static struct clk clk_uart_clk = {
-	.name = "uart_clk",
-	.get_rate = imx_get_perclk1,
-};
-
-static struct clk clk_perclk2 = {
-	.name = "perclk2",
-	.get_rate = imx_get_perclk2,
-};
-
-static struct clk clk_perclk3 = {
-	.name = "perclk3",
-	.get_rate = imx_get_perclk3,
-};
-
-static struct clk *clks[] = {
-	&clk_perclk1,
-	&clk_perclk2,
-	&clk_perclk3,
-	&clk_system_clk,
-	&clk_hclk,
-	&clk_mcu_clk,
-	&clk_uart_clk,
-};
-
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-
-struct clk *clk_get(struct device *dev, const char *id)
-{
-	struct clk *p, *clk = ERR_PTR(-ENOENT);
-
-	mutex_lock(&clocks_mutex);
-	list_for_each_entry(p, &clocks, node) {
-		if (!strcmp(p->name, id)) {
-			clk = p;
-			goto found;
-		}
-	}
-
-found:
-	mutex_unlock(&clocks_mutex);
-
-	return clk;
-}
-EXPORT_SYMBOL(clk_get);
-
-void clk_put(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_put);
-
-int clk_enable(struct clk *clk)
-{
-	return 0;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-	return clk->get_rate();
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-int imx_clocks_init(void)
-{
-	int i;
-
-	mutex_lock(&clocks_mutex);
-	for (i = 0; i < ARRAY_SIZE(clks); i++)
-		list_add(&clks[i]->node, &clocks);
-	mutex_unlock(&clocks_mutex);
-
-	return 0;
-}
-
diff --git a/arch/arm/mach-imx/cpufreq.c b/arch/arm/mach-imx/cpufreq.c
deleted file mode 100644
index 434b4ca0af6..00000000000
--- a/arch/arm/mach-imx/cpufreq.c
+++ /dev/null
@@ -1,315 +0,0 @@
-/*
- * cpu.c: clock scaling for the iMX
- *
- * Copyright (C) 2000 2001, The Delft University of Technology
- * Copyright (c) 2004 Sascha Hauer <sascha@saschahauer.de>
- * Copyright (C) 2006 Inky Lung <ilung@cwlinux.com>
- * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com>
- *
- * Based on SA1100 version written by:
- * - Johan Pouwelse (J.A.Pouwelse@its.tudelft.nl): initial version
- * - Erik Mouw (J.A.K.Mouw@its.tudelft.nl):
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- */
-
-/*#define DEBUG*/
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <asm/system.h>
-
-#include <mach/hardware.h>
-
-#include "generic.h"
-
-#ifndef __val2mfld
-#define __val2mfld(mask,val) (((mask)&~((mask)<<1))*(val)&(mask))
-#endif
-#ifndef __mfld2val
-#define __mfld2val(mask,val) (((val)&(mask))/((mask)&~((mask)<<1)))
-#endif
-
-#define CR_920T_CLOCK_MODE	0xC0000000
-#define CR_920T_FASTBUS_MODE	0x00000000
-#define CR_920T_ASYNC_MODE	0xC0000000
-
-static u32 mpctl0_at_boot;
-static u32 bclk_div_at_boot;
-
-static struct clk *system_clk, *mcu_clk;
-
-static void imx_set_async_mode(void)
-{
-	adjust_cr(CR_920T_CLOCK_MODE, CR_920T_ASYNC_MODE);
-}
-
-static void imx_set_fastbus_mode(void)
-{
-	adjust_cr(CR_920T_CLOCK_MODE, CR_920T_FASTBUS_MODE);
-}
-
-static void imx_set_mpctl0(u32 mpctl0)
-{
-	unsigned long flags;
-
-	if (mpctl0 == 0) {
-		local_irq_save(flags);
-		CSCR &= ~CSCR_MPEN;
-		local_irq_restore(flags);
-		return;
-	}
-
-	local_irq_save(flags);
-	MPCTL0 = mpctl0;
-	CSCR |= CSCR_MPEN;
-	local_irq_restore(flags);
-}
-
-/**
- * imx_compute_mpctl - compute new PLL parameters
- * @new_mpctl:	pointer to location assigned by new PLL control register value
- * @cur_mpctl:	current PLL control register parameters
- * @f_ref:	reference source frequency Hz
- * @freq:	required frequency in Hz
- * @relation:	is one of %CPUFREQ_RELATION_L (supremum)
- *		and %CPUFREQ_RELATION_H (infimum)
- */
-long imx_compute_mpctl(u32 *new_mpctl, u32 cur_mpctl, u32 f_ref, unsigned long freq, int relation)
-{
-        u32 mfi;
-        u32 mfn;
-        u32 mfd;
-        u32 pd;
-	unsigned long long ll;
-	long l;
-	long quot;
-
-	/* Fdppl=2*Fref*(MFI+MFN/(MFD+1))/(PD+1) */
-	/*  PD=<0,15>, MFD=<1,1023>, MFI=<5,15> MFN=<0,1022> */
-
-	if (cur_mpctl) {
-		mfd = ((cur_mpctl >> 16) & 0x3ff) + 1;
-		pd =  ((cur_mpctl >> 26) & 0xf) + 1;
-	} else {
-		pd=2; mfd=313;
-	}
-
-	/* pd=2; mfd=313; mfi=8; mfn=183; */
-	/* (MFI+MFN/(MFD)) = Fdppl / (2*Fref) * (PD); */
-
-	quot = (f_ref + (1 << 9)) >> 10;
-	l = (freq * pd + quot) / (2 * quot);
-	mfi = l >> 10;
-	mfn = ((l & ((1 << 10) - 1)) * mfd + (1 << 9)) >> 10;
-
-	mfd -= 1;
-	pd -= 1;
-
-	*new_mpctl = ((mfi & 0xf) << 10) | (mfn & 0x3ff) | ((mfd & 0x3ff) << 16)
-		| ((pd & 0xf) << 26);
-
-	ll = 2 * (unsigned long long)f_ref * ( (mfi<<16) + (mfn<<16) / (mfd+1) );
-	quot = (pd+1) * (1<<16);
-	ll += quot / 2;
-	do_div(ll, quot);
-	freq = ll;
-
-	pr_debug(KERN_DEBUG "imx: new PLL parameters pd=%d mfd=%d mfi=%d mfn=%d, freq=%ld\n",
-		pd, mfd, mfi, mfn, freq);
-
-	return freq;
-}
-
-
-static int imx_verify_speed(struct cpufreq_policy *policy)
-{
-	if (policy->cpu != 0)
-		return -EINVAL;
-
-	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
-
-	return 0;
-}
-
-static unsigned int imx_get_speed(unsigned int cpu)
-{
-	unsigned int freq;
-	unsigned int cr;
-	unsigned int cscr;
-	unsigned int bclk_div;
-
-	if (cpu)
-		return 0;
-
-	cscr = CSCR;
-	bclk_div = __mfld2val(CSCR_BCLK_DIV, cscr) + 1;
-	cr = get_cr();
-
-	if((cr & CR_920T_CLOCK_MODE) == CR_920T_FASTBUS_MODE) {
-		freq = clk_get_rate(system_clk);
-		freq = (freq + bclk_div/2) / bclk_div;
-	} else {
-		freq = clk_get_rate(mcu_clk);
-		if (cscr & CSCR_MPU_PRESC)
-			freq /= 2;
-	}
-
-	freq = (freq + 500) / 1000;
-
-	return freq;
-}
-
-static int imx_set_target(struct cpufreq_policy *policy,
-			  unsigned int target_freq,
-			  unsigned int relation)
-{
-	struct cpufreq_freqs freqs;
-	u32 mpctl0 = 0;
-	u32 cscr;
-	unsigned long flags;
-	long freq;
-	long sysclk;
-	unsigned int bclk_div = bclk_div_at_boot;
-
-	/*
-	 * Some governors do not respects CPU and policy lower limits
-	 * which leads to bad things (division by zero etc), ensure
-	 * that such things do not happen.
-	 */
-	if(target_freq < policy->cpuinfo.min_freq)
-		target_freq = policy->cpuinfo.min_freq;
-
-	if(target_freq < policy->min)
-		target_freq = policy->min;
-
-	freq = target_freq * 1000;
-
-	pr_debug(KERN_DEBUG "imx: requested frequency %ld Hz, mpctl0 at boot 0x%08x\n",
-			freq, mpctl0_at_boot);
-
-	sysclk = clk_get_rate(system_clk);
-
-	if (freq > sysclk / bclk_div_at_boot + 1000000) {
-		freq = imx_compute_mpctl(&mpctl0, mpctl0_at_boot, CLK32 * 512, freq, relation);
-		if (freq < 0) {
-			printk(KERN_WARNING "imx: target frequency %ld Hz cannot be set\n", freq);
-			return -EINVAL;
-		}
-	} else {
-		if(freq + 1000 < sysclk) {
-			if (relation == CPUFREQ_RELATION_L)
-				bclk_div = (sysclk - 1000) / freq;
-			else
-				bclk_div = (sysclk + freq + 1000) / freq;
-
-			if(bclk_div > 16)
-				bclk_div = 16;
-			if(bclk_div < bclk_div_at_boot)
-				bclk_div = bclk_div_at_boot;
-		}
-		freq = (sysclk + bclk_div / 2) / bclk_div;
-	}
-
-	freqs.old = imx_get_speed(0);
-	freqs.new = (freq + 500) / 1000;
-	freqs.cpu = 0;
-	freqs.flags = 0;
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
-	local_irq_save(flags);
-
-	imx_set_fastbus_mode();
-
-	imx_set_mpctl0(mpctl0);
-
-	cscr = CSCR;
-	cscr &= ~CSCR_BCLK_DIV;
-	cscr |= __val2mfld(CSCR_BCLK_DIV, bclk_div - 1);
-	CSCR = cscr;
-
-	if(mpctl0) {
-		CSCR |= CSCR_MPLL_RESTART;
-
-		/* Wait until MPLL is stabilized */
-		while( CSCR & CSCR_MPLL_RESTART );
-
-		imx_set_async_mode();
-	}
-
-	local_irq_restore(flags);
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
-	pr_debug(KERN_INFO "imx: set frequency %ld Hz, running from %s\n",
-			freq, mpctl0? "MPLL": "SPLL");
-
-	return 0;
-}
-
-static int __init imx_cpufreq_driver_init(struct cpufreq_policy *policy)
-{
-	printk(KERN_INFO "i.MX cpu freq change driver v1.0\n");
-
-	if (policy->cpu != 0)
-		return -EINVAL;
-
-	policy->cur = policy->min = policy->max = imx_get_speed(0);
-	policy->cpuinfo.min_freq = 8000;
-	policy->cpuinfo.max_freq = 200000;
-	 /* Manual states, that PLL stabilizes in two CLK32 periods */
-	policy->cpuinfo.transition_latency = 4 * 1000000000LL / CLK32;
-	return 0;
-}
-
-static struct cpufreq_driver imx_driver = {
-	.flags		= CPUFREQ_STICKY,
-	.verify		= imx_verify_speed,
-	.target		= imx_set_target,
-	.get		= imx_get_speed,
-	.init		= imx_cpufreq_driver_init,
-	.name		= "imx",
-};
-
-static int __init imx_cpufreq_init(void)
-{
-	bclk_div_at_boot = __mfld2val(CSCR_BCLK_DIV, CSCR) + 1;
-	mpctl0_at_boot = 0;
-
-	system_clk = clk_get(NULL, "system_clk");
-	if (IS_ERR(system_clk))
-		return PTR_ERR(system_clk);
-
-	mcu_clk = clk_get(NULL, "mcu_clk");
-	if (IS_ERR(mcu_clk)) {
-		clk_put(system_clk);
-		return PTR_ERR(mcu_clk);
-	}
-
-	if((CSCR & CSCR_MPEN) &&
-	   ((get_cr() & CR_920T_CLOCK_MODE) != CR_920T_FASTBUS_MODE))
-		mpctl0_at_boot = MPCTL0;
-
-	return cpufreq_register_driver(&imx_driver);
-}
-
-arch_initcall(imx_cpufreq_init);
-
diff --git a/arch/arm/mach-imx/dma.c b/arch/arm/mach-imx/dma.c
deleted file mode 100644
index 1536583eece..00000000000
--- a/arch/arm/mach-imx/dma.c
+++ /dev/null
@@ -1,597 +0,0 @@
-/*
- *  linux/arch/arm/mach-imx/dma.c
- *
- *  imx DMA registration and IRQ dispatching
- *
- *  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.
- *
- *  2004-03-03 Sascha Hauer <sascha@saschahauer.de>
- *             initial version heavily inspired by
- *             linux/arch/arm/mach-pxa/dma.c
- *
- *  2005-04-17 Pavel Pisa <pisa@cmp.felk.cvut.cz>
- *             Changed to support scatter gather DMA
- *             by taking Russell's code from RiscPC
- *
- *  2006-05-31 Pavel Pisa <pisa@cmp.felk.cvut.cz>
- *             Corrected error handling code.
- *
- */
-
-#undef DEBUG
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-
-#include <asm/scatterlist.h>
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <mach/hardware.h>
-#include <mach/dma.h>
-#include <mach/imx-dma.h>
-
-struct imx_dma_channel imx_dma_channels[IMX_DMA_CHANNELS];
-
-/*
- * imx_dma_sg_next - prepare next chunk for scatter-gather DMA emulation
- * @dma_ch: i.MX DMA channel number
- * @lastcount: number of bytes transferred during last transfer
- *
- * Functions prepares DMA controller for next sg data chunk transfer.
- * The @lastcount argument informs function about number of bytes transferred
- * during last block. Zero value can be used for @lastcount to setup DMA
- * for the first chunk.
- */
-static inline int imx_dma_sg_next(imx_dmach_t dma_ch, unsigned int lastcount)
-{
-	struct imx_dma_channel *imxdma = &imx_dma_channels[dma_ch];
-	unsigned int nextcount;
-	unsigned int nextaddr;
-
-	if (!imxdma->name) {
-		printk(KERN_CRIT "%s: called for  not allocated channel %d\n",
-		       __func__, dma_ch);
-		return 0;
-	}
-
-	imxdma->resbytes -= lastcount;
-
-	if (!imxdma->sg) {
-		pr_debug("imxdma%d: no sg data\n", dma_ch);
-		return 0;
-	}
-
-	imxdma->sgbc += lastcount;
-	if ((imxdma->sgbc >= imxdma->sg->length) || !imxdma->resbytes) {
-		if ((imxdma->sgcount <= 1) || !imxdma->resbytes) {
-			pr_debug("imxdma%d: sg transfer limit reached\n",
-				 dma_ch);
-			imxdma->sgcount=0;
-			imxdma->sg = NULL;
-			return 0;
-		} else {
-			imxdma->sgcount--;
-			imxdma->sg++;
-			imxdma->sgbc = 0;
-		}
-	}
-	nextcount = imxdma->sg->length - imxdma->sgbc;
-	nextaddr = imxdma->sg->dma_address + imxdma->sgbc;
-
-	if(imxdma->resbytes < nextcount)
-		nextcount = imxdma->resbytes;
-
-	if ((imxdma->dma_mode & DMA_MODE_MASK) == DMA_MODE_READ)
-		DAR(dma_ch) = nextaddr;
-	else
-		SAR(dma_ch) = nextaddr;
-
-	CNTR(dma_ch) = nextcount;
-	pr_debug("imxdma%d: next sg chunk dst 0x%08x, src 0x%08x, size 0x%08x\n",
-		 dma_ch, DAR(dma_ch), SAR(dma_ch), CNTR(dma_ch));
-
-	return nextcount;
-}
-
-/*
- * imx_dma_setup_sg_base - scatter-gather DMA emulation
- * @dma_ch: i.MX DMA channel number
- * @sg: pointer to the scatter-gather list/vector
- * @sgcount: scatter-gather list hungs count
- *
- * Functions sets up i.MX DMA state for emulated scatter-gather transfer
- * and sets up channel registers to be ready for the first chunk
- */
-static int
-imx_dma_setup_sg_base(imx_dmach_t dma_ch,
-		      struct scatterlist *sg, unsigned int sgcount)
-{
-	struct imx_dma_channel *imxdma = &imx_dma_channels[dma_ch];
-
-	imxdma->sg = sg;
-	imxdma->sgcount = sgcount;
-	imxdma->sgbc = 0;
-	return imx_dma_sg_next(dma_ch, 0);
-}
-
-/**
- * imx_dma_setup_single - setup i.MX DMA channel for linear memory to/from device transfer
- * @dma_ch: i.MX DMA channel number
- * @dma_address: the DMA/physical memory address of the linear data block
- *		to transfer
- * @dma_length: length of the data block in bytes
- * @dev_addr: physical device port address
- * @dmamode: DMA transfer mode, %DMA_MODE_READ from the device to the memory
- *           or %DMA_MODE_WRITE from memory to the device
- *
- * The function setups DMA channel source and destination addresses for transfer
- * specified by provided parameters. The scatter-gather emulation is disabled,
- * because linear data block
- * form the physical address range is transferred.
- * Return value: if incorrect parameters are provided -%EINVAL.
- *		Zero indicates success.
- */
-int
-imx_dma_setup_single(imx_dmach_t dma_ch, dma_addr_t dma_address,
-		     unsigned int dma_length, unsigned int dev_addr,
-		     unsigned int dmamode)
-{
-	struct imx_dma_channel *imxdma = &imx_dma_channels[dma_ch];
-
-	imxdma->sg = NULL;
-	imxdma->sgcount = 0;
-	imxdma->dma_mode = dmamode;
-	imxdma->resbytes = dma_length;
-
-	if (!dma_address) {
-		printk(KERN_ERR "imxdma%d: imx_dma_setup_single null address\n",
-		       dma_ch);
-		return -EINVAL;
-	}
-
-	if (!dma_length) {
-		printk(KERN_ERR "imxdma%d: imx_dma_setup_single zero length\n",
-		       dma_ch);
-		return -EINVAL;
-	}
-
-	if ((dmamode & DMA_MODE_MASK) == DMA_MODE_READ) {
-		pr_debug("imxdma%d: mx_dma_setup_single2dev dma_addressg=0x%08x dma_length=%d dev_addr=0x%08x for read\n",
-			dma_ch, (unsigned int)dma_address, dma_length,
-			dev_addr);
-		SAR(dma_ch) = dev_addr;
-		DAR(dma_ch) = (unsigned int)dma_address;
-	} else if ((dmamode & DMA_MODE_MASK) == DMA_MODE_WRITE) {
-		pr_debug("imxdma%d: mx_dma_setup_single2dev dma_addressg=0x%08x dma_length=%d dev_addr=0x%08x for write\n",
-			dma_ch, (unsigned int)dma_address, dma_length,
-			dev_addr);
-		SAR(dma_ch) = (unsigned int)dma_address;
-		DAR(dma_ch) = dev_addr;
-	} else {
-		printk(KERN_ERR "imxdma%d: imx_dma_setup_single bad dmamode\n",
-		       dma_ch);
-		return -EINVAL;
-	}
-
-	CNTR(dma_ch) = dma_length;
-
-	return 0;
-}
-
-/**
- * imx_dma_setup_sg - setup i.MX DMA channel SG list to/from device transfer
- * @dma_ch: i.MX DMA channel number
- * @sg: pointer to the scatter-gather list/vector
- * @sgcount: scatter-gather list hungs count
- * @dma_length: total length of the transfer request in bytes
- * @dev_addr: physical device port address
- * @dmamode: DMA transfer mode, %DMA_MODE_READ from the device to the memory
- *           or %DMA_MODE_WRITE from memory to the device
- *
- * The function sets up DMA channel state and registers to be ready for transfer
- * specified by provided parameters. The scatter-gather emulation is set up
- * according to the parameters.
- *
- * The full preparation of the transfer requires setup of more register
- * by the caller before imx_dma_enable() can be called.
- *
- * %BLR(dma_ch) holds transfer burst length in bytes, 0 means 64 bytes
- *
- * %RSSR(dma_ch) has to be set to the DMA request line source %DMA_REQ_xxx
- *
- * %CCR(dma_ch) has to specify transfer parameters, the next settings is typical
- * for linear or simple scatter-gather transfers if %DMA_MODE_READ is specified
- *
- * %CCR_DMOD_LINEAR | %CCR_DSIZ_32 | %CCR_SMOD_FIFO | %CCR_SSIZ_x
- *
- * The typical setup for %DMA_MODE_WRITE is specified by next options combination
- *
- * %CCR_SMOD_LINEAR | %CCR_SSIZ_32 | %CCR_DMOD_FIFO | %CCR_DSIZ_x
- *
- * Be careful here and do not mistakenly mix source and target device
- * port sizes constants, they are really different:
- * %CCR_SSIZ_8, %CCR_SSIZ_16, %CCR_SSIZ_32,
- * %CCR_DSIZ_8, %CCR_DSIZ_16, %CCR_DSIZ_32
- *
- * Return value: if incorrect parameters are provided -%EINVAL.
- * Zero indicates success.
- */
-int
-imx_dma_setup_sg(imx_dmach_t dma_ch,
-		 struct scatterlist *sg, unsigned int sgcount, unsigned int dma_length,
-		 unsigned int dev_addr, unsigned int dmamode)
-{
-	int res;
-	struct imx_dma_channel *imxdma = &imx_dma_channels[dma_ch];
-
-	imxdma->sg = NULL;
-	imxdma->sgcount = 0;
-	imxdma->dma_mode = dmamode;
-	imxdma->resbytes = dma_length;
-
-	if (!sg || !sgcount) {
-		printk(KERN_ERR "imxdma%d: imx_dma_setup_sg epty sg list\n",
-		       dma_ch);
-		return -EINVAL;
-	}
-
-	if (!sg->length) {
-		printk(KERN_ERR "imxdma%d: imx_dma_setup_sg zero length\n",
-		       dma_ch);
-		return -EINVAL;
-	}
-
-	if ((dmamode & DMA_MODE_MASK) == DMA_MODE_READ) {
-		pr_debug("imxdma%d: mx_dma_setup_sg2dev sg=%p sgcount=%d total length=%d dev_addr=0x%08x for read\n",
-			dma_ch, sg, sgcount, dma_length, dev_addr);
-		SAR(dma_ch) = dev_addr;
-	} else if ((dmamode & DMA_MODE_MASK) == DMA_MODE_WRITE) {
-		pr_debug("imxdma%d: mx_dma_setup_sg2dev sg=%p sgcount=%d total length=%d dev_addr=0x%08x for write\n",
-			dma_ch, sg, sgcount, dma_length, dev_addr);
-		DAR(dma_ch) = dev_addr;
-	} else {
-		printk(KERN_ERR "imxdma%d: imx_dma_setup_sg bad dmamode\n",
-		       dma_ch);
-		return -EINVAL;
-	}
-
-	res = imx_dma_setup_sg_base(dma_ch, sg, sgcount);
-	if (res <= 0) {
-		printk(KERN_ERR "imxdma%d: no sg chunk ready\n", dma_ch);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/**
- * imx_dma_setup_handlers - setup i.MX DMA channel end and error notification handlers
- * @dma_ch: i.MX DMA channel number
- * @irq_handler: the pointer to the function called if the transfer
- *		ends successfully
- * @err_handler: the pointer to the function called if the premature
- *		end caused by error occurs
- * @data: user specified value to be passed to the handlers
- */
-int
-imx_dma_setup_handlers(imx_dmach_t dma_ch,
-		       void (*irq_handler) (int, void *),
-		       void (*err_handler) (int, void *, int),
-		       void *data)
-{
-	struct imx_dma_channel *imxdma = &imx_dma_channels[dma_ch];
-	unsigned long flags;
-
-	if (!imxdma->name) {
-		printk(KERN_CRIT "%s: called for  not allocated channel %d\n",
-		       __func__, dma_ch);
-		return -ENODEV;
-	}
-
-	local_irq_save(flags);
-	DISR = (1 << dma_ch);
-	imxdma->irq_handler = irq_handler;
-	imxdma->err_handler = err_handler;
-	imxdma->data = data;
-	local_irq_restore(flags);
-	return 0;
-}
-
-/**
- * imx_dma_enable - function to start i.MX DMA channel operation
- * @dma_ch: i.MX DMA channel number
- *
- * The channel has to be allocated by driver through imx_dma_request()
- * or imx_dma_request_by_prio() function.
- * The transfer parameters has to be set to the channel registers through
- * call of the imx_dma_setup_single() or imx_dma_setup_sg() function
- * and registers %BLR(dma_ch), %RSSR(dma_ch) and %CCR(dma_ch) has to
- * be set prior this function call by the channel user.
- */
-void imx_dma_enable(imx_dmach_t dma_ch)
-{
-	struct imx_dma_channel *imxdma = &imx_dma_channels[dma_ch];
-	unsigned long flags;
-
-	pr_debug("imxdma%d: imx_dma_enable\n", dma_ch);
-
-	if (!imxdma->name) {
-		printk(KERN_CRIT "%s: called for  not allocated channel %d\n",
-		       __func__, dma_ch);
-		return;
-	}
-
-	local_irq_save(flags);
-	DISR = (1