Linux-libre 4.6.2-gnu

1 files changed, 0 insertions, 1259 deletions

diff --git a/drivers/dma/qcom_bam_dma.c b/drivers/dma/qcom_bam_dma.c
deleted file mode 100644
index 5a250cdc8..000000000
--- a/drivers/dma/qcom_bam_dma.c
+++ /dev/null
@@ -1,1259 +0,0 @@
-/*
- * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * 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.
- *
- */
-/*
- * QCOM BAM DMA engine driver
- *
- * QCOM BAM DMA blocks are distributed amongst a number of the on-chip
- * peripherals on the MSM 8x74.  The configuration of the channels are dependent
- * on the way they are hard wired to that specific peripheral.  The peripheral
- * device tree entries specify the configuration of each channel.
- *
- * The DMA controller requires the use of external memory for storage of the
- * hardware descriptors for each channel.  The descriptor FIFO is accessed as a
- * circular buffer and operations are managed according to the offset within the
- * FIFO.  After pipe/channel reset, all of the pipe registers and internal state
- * are back to defaults.
- *
- * During DMA operations, we write descriptors to the FIFO, being careful to
- * handle wrapping and then write the last FIFO offset to that channel's
- * P_EVNT_REG register to kick off the transaction.  The P_SW_OFSTS register
- * indicates the current FIFO offset that is being processed, so there is some
- * indication of where the hardware is currently working.
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/scatterlist.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/of_dma.h>
-#include <linux/clk.h>
-#include <linux/dmaengine.h>
-
-#include "dmaengine.h"
-#include "virt-dma.h"
-
-struct bam_desc_hw {
-	u32 addr;		/* Buffer physical address */
-	u16 size;		/* Buffer size in bytes */
-	u16 flags;
-};
-
-#define DESC_FLAG_INT BIT(15)
-#define DESC_FLAG_EOT BIT(14)
-#define DESC_FLAG_EOB BIT(13)
-#define DESC_FLAG_NWD BIT(12)
-
-struct bam_async_desc {
-	struct virt_dma_desc vd;
-
-	u32 num_desc;
-	u32 xfer_len;
-
-	/* transaction flags, EOT|EOB|NWD */
-	u16 flags;
-
-	struct bam_desc_hw *curr_desc;
-
-	enum dma_transfer_direction dir;
-	size_t length;
-	struct bam_desc_hw desc[0];
-};
-
-enum bam_reg {
-	BAM_CTRL,
-	BAM_REVISION,
-	BAM_NUM_PIPES,
-	BAM_DESC_CNT_TRSHLD,
-	BAM_IRQ_SRCS,
-	BAM_IRQ_SRCS_MSK,
-	BAM_IRQ_SRCS_UNMASKED,
-	BAM_IRQ_STTS,
-	BAM_IRQ_CLR,
-	BAM_IRQ_EN,
-	BAM_CNFG_BITS,
-	BAM_IRQ_SRCS_EE,
-	BAM_IRQ_SRCS_MSK_EE,
-	BAM_P_CTRL,
-	BAM_P_RST,
-	BAM_P_HALT,
-	BAM_P_IRQ_STTS,
-	BAM_P_IRQ_CLR,
-	BAM_P_IRQ_EN,
-	BAM_P_EVNT_DEST_ADDR,
-	BAM_P_EVNT_REG,
-	BAM_P_SW_OFSTS,
-	BAM_P_DATA_FIFO_ADDR,
-	BAM_P_DESC_FIFO_ADDR,
-	BAM_P_EVNT_GEN_TRSHLD,
-	BAM_P_FIFO_SIZES,
-};
-
-struct reg_offset_data {
-	u32 base_offset;
-	unsigned int pipe_mult, evnt_mult, ee_mult;
-};
-
-static const struct reg_offset_data bam_v1_3_reg_info[] = {
-	[BAM_CTRL]		= { 0x0F80, 0x00, 0x00, 0x00 },
-	[BAM_REVISION]		= { 0x0F84, 0x00, 0x00, 0x00 },
-	[BAM_NUM_PIPES]		= { 0x0FBC, 0x00, 0x00, 0x00 },
-	[BAM_DESC_CNT_TRSHLD]	= { 0x0F88, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS]		= { 0x0F8C, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_MSK]	= { 0x0F90, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_UNMASKED]	= { 0x0FB0, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_STTS]		= { 0x0F94, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_CLR]		= { 0x0F98, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_EN]		= { 0x0F9C, 0x00, 0x00, 0x00 },
-	[BAM_CNFG_BITS]		= { 0x0FFC, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_EE]	= { 0x1800, 0x00, 0x00, 0x80 },
-	[BAM_IRQ_SRCS_MSK_EE]	= { 0x1804, 0x00, 0x00, 0x80 },
-	[BAM_P_CTRL]		= { 0x0000, 0x80, 0x00, 0x00 },
-	[BAM_P_RST]		= { 0x0004, 0x80, 0x00, 0x00 },
-	[BAM_P_HALT]		= { 0x0008, 0x80, 0x00, 0x00 },
-	[BAM_P_IRQ_STTS]	= { 0x0010, 0x80, 0x00, 0x00 },
-	[BAM_P_IRQ_CLR]		= { 0x0014, 0x80, 0x00, 0x00 },
-	[BAM_P_IRQ_EN]		= { 0x0018, 0x80, 0x00, 0x00 },
-	[BAM_P_EVNT_DEST_ADDR]	= { 0x102C, 0x00, 0x40, 0x00 },
-	[BAM_P_EVNT_REG]	= { 0x1018, 0x00, 0x40, 0x00 },
-	[BAM_P_SW_OFSTS]	= { 0x1000, 0x00, 0x40, 0x00 },
-	[BAM_P_DATA_FIFO_ADDR]	= { 0x1024, 0x00, 0x40, 0x00 },
-	[BAM_P_DESC_FIFO_ADDR]	= { 0x101C, 0x00, 0x40, 0x00 },
-	[BAM_P_EVNT_GEN_TRSHLD]	= { 0x1028, 0x00, 0x40, 0x00 },
-	[BAM_P_FIFO_SIZES]	= { 0x1020, 0x00, 0x40, 0x00 },
-};
-
-static const struct reg_offset_data bam_v1_4_reg_info[] = {
-	[BAM_CTRL]		= { 0x0000, 0x00, 0x00, 0x00 },
-	[BAM_REVISION]		= { 0x0004, 0x00, 0x00, 0x00 },
-	[BAM_NUM_PIPES]		= { 0x003C, 0x00, 0x00, 0x00 },
-	[BAM_DESC_CNT_TRSHLD]	= { 0x0008, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS]		= { 0x000C, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_MSK]	= { 0x0010, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_UNMASKED]	= { 0x0030, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_STTS]		= { 0x0014, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_CLR]		= { 0x0018, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_EN]		= { 0x001C, 0x00, 0x00, 0x00 },
-	[BAM_CNFG_BITS]		= { 0x007C, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_EE]	= { 0x0800, 0x00, 0x00, 0x80 },
-	[BAM_IRQ_SRCS_MSK_EE]	= { 0x0804, 0x00, 0x00, 0x80 },
-	[BAM_P_CTRL]		= { 0x1000, 0x1000, 0x00, 0x00 },
-	[BAM_P_RST]		= { 0x1004, 0x1000, 0x00, 0x00 },
-	[BAM_P_HALT]		= { 0x1008, 0x1000, 0x00, 0x00 },
-	[BAM_P_IRQ_STTS]	= { 0x1010, 0x1000, 0x00, 0x00 },
-	[BAM_P_IRQ_CLR]		= { 0x1014, 0x1000, 0x00, 0x00 },
-	[BAM_P_IRQ_EN]		= { 0x1018, 0x1000, 0x00, 0x00 },
-	[BAM_P_EVNT_DEST_ADDR]	= { 0x182C, 0x00, 0x1000, 0x00 },
-	[BAM_P_EVNT_REG]	= { 0x1818, 0x00, 0x1000, 0x00 },
-	[BAM_P_SW_OFSTS]	= { 0x1800, 0x00, 0x1000, 0x00 },
-	[BAM_P_DATA_FIFO_ADDR]	= { 0x1824, 0x00, 0x1000, 0x00 },
-	[BAM_P_DESC_FIFO_ADDR]	= { 0x181C, 0x00, 0x1000, 0x00 },
-	[BAM_P_EVNT_GEN_TRSHLD]	= { 0x1828, 0x00, 0x1000, 0x00 },
-	[BAM_P_FIFO_SIZES]	= { 0x1820, 0x00, 0x1000, 0x00 },
-};
-
-static const struct reg_offset_data bam_v1_7_reg_info[] = {
-	[BAM_CTRL]		= { 0x00000, 0x00, 0x00, 0x00 },
-	[BAM_REVISION]		= { 0x01000, 0x00, 0x00, 0x00 },
-	[BAM_NUM_PIPES]		= { 0x01008, 0x00, 0x00, 0x00 },
-	[BAM_DESC_CNT_TRSHLD]	= { 0x00008, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS]		= { 0x03010, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_MSK]	= { 0x03014, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_UNMASKED]	= { 0x03018, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_STTS]		= { 0x00014, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_CLR]		= { 0x00018, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_EN]		= { 0x0001C, 0x00, 0x00, 0x00 },
-	[BAM_CNFG_BITS]		= { 0x0007C, 0x00, 0x00, 0x00 },
-	[BAM_IRQ_SRCS_EE]	= { 0x03000, 0x00, 0x00, 0x1000 },
-	[BAM_IRQ_SRCS_MSK_EE]	= { 0x03004, 0x00, 0x00, 0x1000 },
-	[BAM_P_CTRL]		= { 0x13000, 0x1000, 0x00, 0x00 },
-	[BAM_P_RST]		= { 0x13004, 0x1000, 0x00, 0x00 },
-	[BAM_P_HALT]		= { 0x13008, 0x1000, 0x00, 0x00 },
-	[BAM_P_IRQ_STTS]	= { 0x13010, 0x1000, 0x00, 0x00 },
-	[BAM_P_IRQ_CLR]		= { 0x13014, 0x1000, 0x00, 0x00 },
-	[BAM_P_IRQ_EN]		= { 0x13018, 0x1000, 0x00, 0x00 },
-	[BAM_P_EVNT_DEST_ADDR]	= { 0x1382C, 0x00, 0x1000, 0x00 },
-	[BAM_P_EVNT_REG]	= { 0x13818, 0x00, 0x1000, 0x00 },
-	[BAM_P_SW_OFSTS]	= { 0x13800, 0x00, 0x1000, 0x00 },
-	[BAM_P_DATA_FIFO_ADDR]	= { 0x13824, 0x00, 0x1000, 0x00 },
-	[BAM_P_DESC_FIFO_ADDR]	= { 0x1381C, 0x00, 0x1000, 0x00 },
-	[BAM_P_EVNT_GEN_TRSHLD]	= { 0x13828, 0x00, 0x1000, 0x00 },
-	[BAM_P_FIFO_SIZES]	= { 0x13820, 0x00, 0x1000, 0x00 },
-};
-
-/* BAM CTRL */
-#define BAM_SW_RST			BIT(0)
-#define BAM_EN				BIT(1)
-#define BAM_EN_ACCUM			BIT(4)
-#define BAM_TESTBUS_SEL_SHIFT		5
-#define BAM_TESTBUS_SEL_MASK		0x3F
-#define BAM_DESC_CACHE_SEL_SHIFT	13
-#define BAM_DESC_CACHE_SEL_MASK		0x3
-#define BAM_CACHED_DESC_STORE		BIT(15)
-#define IBC_DISABLE			BIT(16)
-
-/* BAM REVISION */
-#define REVISION_SHIFT		0
-#define REVISION_MASK		0xFF
-#define NUM_EES_SHIFT		8
-#define NUM_EES_MASK		0xF
-#define CE_BUFFER_SIZE		BIT(13)
-#define AXI_ACTIVE		BIT(14)
-#define USE_VMIDMT		BIT(15)
-#define SECURED			BIT(16)
-#define BAM_HAS_NO_BYPASS	BIT(17)
-#define HIGH_FREQUENCY_BAM	BIT(18)
-#define INACTIV_TMRS_EXST	BIT(19)
-#define NUM_INACTIV_TMRS	BIT(20)
-#define DESC_CACHE_DEPTH_SHIFT	21
-#define DESC_CACHE_DEPTH_1	(0 << DESC_CACHE_DEPTH_SHIFT)
-#define DESC_CACHE_DEPTH_2	(1 << DESC_CACHE_DEPTH_SHIFT)
-#define DESC_CACHE_DEPTH_3	(2 << DESC_CACHE_DEPTH_SHIFT)
-#define DESC_CACHE_DEPTH_4	(3 << DESC_CACHE_DEPTH_SHIFT)
-#define CMD_DESC_EN		BIT(23)
-#define INACTIV_TMR_BASE_SHIFT	24
-#define INACTIV_TMR_BASE_MASK	0xFF
-
-/* BAM NUM PIPES */
-#define BAM_NUM_PIPES_SHIFT		0
-#define BAM_NUM_PIPES_MASK		0xFF
-#define PERIPH_NON_PIPE_GRP_SHIFT	16
-#define PERIPH_NON_PIP_GRP_MASK		0xFF
-#define BAM_NON_PIPE_GRP_SHIFT		24
-#define BAM_NON_PIPE_GRP_MASK		0xFF
-
-/* BAM CNFG BITS */
-#define BAM_PIPE_CNFG		BIT(2)
-#define BAM_FULL_PIPE		BIT(11)
-#define BAM_NO_EXT_P_RST	BIT(12)
-#define BAM_IBC_DISABLE		BIT(13)
-#define BAM_SB_CLK_REQ		BIT(14)
-#define BAM_PSM_CSW_REQ		BIT(15)
-#define BAM_PSM_P_RES		BIT(16)
-#define BAM_AU_P_RES		BIT(17)
-#define BAM_SI_P_RES		BIT(18)
-#define BAM_WB_P_RES		BIT(19)
-#define BAM_WB_BLK_CSW		BIT(20)
-#define BAM_WB_CSW_ACK_IDL	BIT(21)
-#define BAM_WB_RETR_SVPNT	BIT(22)
-#define BAM_WB_DSC_AVL_P_RST	BIT(23)
-#define BAM_REG_P_EN		BIT(24)
-#define BAM_PSM_P_HD_DATA	BIT(25)
-#define BAM_AU_ACCUMED		BIT(26)
-#define BAM_CMD_ENABLE		BIT(27)
-
-#define BAM_CNFG_BITS_DEFAULT	(BAM_PIPE_CNFG |	\
-				 BAM_NO_EXT_P_RST |	\
-				 BAM_IBC_DISABLE |	\
-				 BAM_SB_CLK_REQ |	\
-				 BAM_PSM_CSW_REQ |	\
-				 BAM_PSM_P_RES |	\
-				 BAM_AU_P_RES |		\
-				 BAM_SI_P_RES |		\
-				 BAM_WB_P_RES |		\
-				 BAM_WB_BLK_CSW |	\
-				 BAM_WB_CSW_ACK_IDL |	\
-				 BAM_WB_RETR_SVPNT |	\
-				 BAM_WB_DSC_AVL_P_RST |	\
-				 BAM_REG_P_EN |		\
-				 BAM_PSM_P_HD_DATA |	\
-				 BAM_AU_ACCUMED |	\
-				 BAM_CMD_ENABLE)
-
-/* PIPE CTRL */
-#define P_EN			BIT(1)
-#define P_DIRECTION		BIT(3)
-#define P_SYS_STRM		BIT(4)
-#define P_SYS_MODE		BIT(5)
-#define P_AUTO_EOB		BIT(6)
-#define P_AUTO_EOB_SEL_SHIFT	7
-#define P_AUTO_EOB_SEL_512	(0 << P_AUTO_EOB_SEL_SHIFT)
-#define P_AUTO_EOB_SEL_256	(1 << P_AUTO_EOB_SEL_SHIFT)
-#define P_AUTO_EOB_SEL_128	(2 << P_AUTO_EOB_SEL_SHIFT)
-#define P_AUTO_EOB_SEL_64	(3 << P_AUTO_EOB_SEL_SHIFT)
-#define P_PREFETCH_LIMIT_SHIFT	9
-#define P_PREFETCH_LIMIT_32	(0 << P_PREFETCH_LIMIT_SHIFT)
-#define P_PREFETCH_LIMIT_16	(1 << P_PREFETCH_LIMIT_SHIFT)
-#define P_PREFETCH_LIMIT_4	(2 << P_PREFETCH_LIMIT_SHIFT)
-#define P_WRITE_NWD		BIT(11)
-#define P_LOCK_GROUP_SHIFT	16
-#define P_LOCK_GROUP_MASK	0x1F
-
-/* BAM_DESC_CNT_TRSHLD */
-#define CNT_TRSHLD		0xffff
-#define DEFAULT_CNT_THRSHLD	0x4
-
-/* BAM_IRQ_SRCS */
-#define BAM_IRQ			BIT(31)
-#define P_IRQ			0x7fffffff
-
-/* BAM_IRQ_SRCS_MSK */
-#define BAM_IRQ_MSK		BAM_IRQ
-#define P_IRQ_MSK		P_IRQ
-
-/* BAM_IRQ_STTS */
-#define BAM_TIMER_IRQ		BIT(4)
-#define BAM_EMPTY_IRQ		BIT(3)
-#define BAM_ERROR_IRQ		BIT(2)
-#define BAM_HRESP_ERR_IRQ	BIT(1)
-
-/* BAM_IRQ_CLR */
-#define BAM_TIMER_CLR		BIT(4)
-#define BAM_EMPTY_CLR		BIT(3)
-#define BAM_ERROR_CLR		BIT(2)
-#define BAM_HRESP_ERR_CLR	BIT(1)
-
-/* BAM_IRQ_EN */
-#define BAM_TIMER_EN		BIT(4)
-#define BAM_EMPTY_EN		BIT(3)
-#define BAM_ERROR_EN		BIT(2)
-#define BAM_HRESP_ERR_EN	BIT(1)
-
-/* BAM_P_IRQ_EN */
-#define P_PRCSD_DESC_EN		BIT(0)
-#define P_TIMER_EN		BIT(1)
-#define P_WAKE_EN		BIT(2)
-#define P_OUT_OF_DESC_EN	BIT(3)
-#define P_ERR_EN		BIT(4)
-#define P_TRNSFR_END_EN		BIT(5)
-#define P_DEFAULT_IRQS_EN	(P_PRCSD_DESC_EN | P_ERR_EN | P_TRNSFR_END_EN)
-
-/* BAM_P_SW_OFSTS */
-#define P_SW_OFSTS_MASK		0xffff
-
-#define BAM_DESC_FIFO_SIZE	SZ_32K
-#define MAX_DESCRIPTORS (BAM_DESC_FIFO_SIZE / sizeof(struct bam_desc_hw) - 1)
-#define BAM_MAX_DATA_SIZE	(SZ_32K - 8)
-
-struct bam_chan {
-	struct virt_dma_chan vc;
-
-	struct bam_device *bdev;
-
-	/* configuration from device tree */
-	u32 id;
-
-	struct bam_async_desc *curr_txd;	/* current running dma */
-
-	/* runtime configuration */
-	struct dma_slave_config slave;
-
-	/* fifo storage */
-	struct bam_desc_hw *fifo_virt;
-	dma_addr_t fifo_phys;
-
-	/* fifo markers */
-	unsigned short head;		/* start of active descriptor entries */
-	unsigned short tail;		/* end of active descriptor entries */
-
-	unsigned int initialized;	/* is the channel hw initialized? */
-	unsigned int paused;		/* is the channel paused? */
-	unsigned int reconfigure;	/* new slave config? */
-
-	struct list_head node;
-};
-
-static inline struct bam_chan *to_bam_chan(struct dma_chan *common)
-{
-	return container_of(common, struct bam_chan, vc.chan);
-}
-
-struct bam_device {
-	void __iomem *regs;
-	struct device *dev;
-	struct dma_device common;
-	struct device_dma_parameters dma_parms;
-	struct bam_chan *channels;
-	u32 num_channels;
-
-	/* execution environment ID, from DT */
-	u32 ee;
-
-	const struct reg_offset_data *layout;
-
-	struct clk *bamclk;
-	int irq;
-
-	/* dma start transaction tasklet */
-	struct tasklet_struct task;
-};
-
-/**
- * bam_addr - returns BAM register address
- * @bdev: bam device
- * @pipe: pipe instance (ignored when register doesn't have multiple instances)
- * @reg:  register enum
- */
-static inline void __iomem *bam_addr(struct bam_device *bdev, u32 pipe,
-		enum bam_reg reg)
-{
-	const struct reg_offset_data r = bdev->layout[reg];
-
-	return bdev->regs + r.base_offset +
-		r.pipe_mult * pipe +
-		r.evnt_mult * pipe +
-		r.ee_mult * bdev->ee;
-}
-
-/**
- * bam_reset_channel - Reset individual BAM DMA channel
- * @bchan: bam channel
- *
- * This function resets a specific BAM channel
- */
-static void bam_reset_channel(struct bam_chan *bchan)
-{
-	struct bam_device *bdev = bchan->bdev;
-
-	lockdep_assert_held(&bchan->vc.lock);
-
-	/* reset channel */
-	writel_relaxed(1, bam_addr(bdev, bchan->id, BAM_P_RST));
-	writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_RST));
-
-	/* don't allow cpu to reorder BAM register accesses done after this */
-	wmb();
-
-	/* make sure hw is initialized when channel is used the first time  */
-	bchan->initialized = 0;
-}
-
-/**
- * bam_chan_init_hw - Initialize channel hardware
- * @bchan: bam channel
- *
- * This function resets and initializes the BAM channel
- */
-static void bam_chan_init_hw(struct bam_chan *bchan,
-	enum dma_transfer_direction dir)
-{
-	struct bam_device *bdev = bchan->bdev;
-	u32 val;
-
-	/* Reset the channel to clear internal state of the FIFO */
-	bam_reset_channel(bchan);
-
-	/*
-	 * write out 8 byte aligned address.  We have enough space for this
-	 * because we allocated 1 more descriptor (8 bytes) than we can use
-	 */
-	writel_relaxed(ALIGN(bchan->fifo_phys, sizeof(struct bam_desc_hw)),
-			bam_addr(bdev, bchan->id, BAM_P_DESC_FIFO_ADDR));
-	writel_relaxed(BAM_DESC_FIFO_SIZE,
-			bam_addr(bdev, bchan->id, BAM_P_FIFO_SIZES));
-
-	/* enable the per pipe interrupts, enable EOT, ERR, and INT irqs */
-	writel_relaxed(P_DEFAULT_IRQS_EN,
-			bam_addr(bdev, bchan->id, BAM_P_IRQ_EN));
-
-	/* unmask the specific pipe and EE combo */
-	val = readl_relaxed(bam_addr(bdev, 0, BAM_IRQ_SRCS_MSK_EE));
-	val |= BIT(bchan->id);
-	writel_relaxed(val, bam_addr(bdev, 0, BAM_IRQ_SRCS_MSK_EE));
-
-	/* don't allow cpu to reorder the channel enable done below */
-	wmb();
-
-	/* set fixed direction and mode, then enable channel */
-	val = P_EN | P_SYS_MODE;
-	if (dir == DMA_DEV_TO_MEM)
-		val |= P_DIRECTION;
-
-	writel_relaxed(val, bam_addr(bdev, bchan->id, BAM_P_CTRL));
-
-	bchan->initialized = 1;
-
-	/* init FIFO pointers */
-	bchan->head = 0;
-	bchan->tail = 0;
-}
-
-/**
- * bam_alloc_chan - Allocate channel resources for DMA channel.
- * @chan: specified channel
- *
- * This function allocates the FIFO descriptor memory
- */
-static int bam_alloc_chan(struct dma_chan *chan)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	struct bam_device *bdev = bchan->bdev;
-
-	if (bchan->fifo_virt)
-		return 0;
-
-	/* allocate FIFO descriptor space, but only if necessary */
-	bchan->fifo_virt = dma_alloc_writecombine(bdev->dev, BAM_DESC_FIFO_SIZE,
-				&bchan->fifo_phys, GFP_KERNEL);
-
-	if (!bchan->fifo_virt) {
-		dev_err(bdev->dev, "Failed to allocate desc fifo\n");
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-/**
- * bam_free_chan - Frees dma resources associated with specific channel
- * @chan: specified channel
- *
- * Free the allocated fifo descriptor memory and channel resources
- *
- */
-static void bam_free_chan(struct dma_chan *chan)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	struct bam_device *bdev = bchan->bdev;
-	u32 val;
-	unsigned long flags;
-
-	vchan_free_chan_resources(to_virt_chan(chan));
-
-	if (bchan->curr_txd) {
-		dev_err(bchan->bdev->dev, "Cannot free busy channel\n");
-		return;
-	}
-
-	spin_lock_irqsave(&bchan->vc.lock, flags);
-	bam_reset_channel(bchan);
-	spin_unlock_irqrestore(&bchan->vc.lock, flags);
-
-	dma_free_writecombine(bdev->dev, BAM_DESC_FIFO_SIZE, bchan->fifo_virt,
-				bchan->fifo_phys);
-	bchan->fifo_virt = NULL;
-
-	/* mask irq for pipe/channel */
-	val = readl_relaxed(bam_addr(bdev, 0, BAM_IRQ_SRCS_MSK_EE));
-	val &= ~BIT(bchan->id);
-	writel_relaxed(val, bam_addr(bdev, 0, BAM_IRQ_SRCS_MSK_EE));
-
-	/* disable irq */
-	writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_IRQ_EN));
-}
-
-/**
- * bam_slave_config - set slave configuration for channel
- * @chan: dma channel
- * @cfg: slave configuration
- *
- * Sets slave configuration for channel
- *
- */
-static int bam_slave_config(struct dma_chan *chan,
-			    struct dma_slave_config *cfg)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	unsigned long flag;
-
-	spin_lock_irqsave(&bchan->vc.lock, flag);
-	memcpy(&bchan->slave, cfg, sizeof(*cfg));
-	bchan->reconfigure = 1;
-	spin_unlock_irqrestore(&bchan->vc.lock, flag);
-
-	return 0;
-}
-
-/**
- * bam_prep_slave_sg - Prep slave sg transaction
- *
- * @chan: dma channel
- * @sgl: scatter gather list
- * @sg_len: length of sg
- * @direction: DMA transfer direction
- * @flags: DMA flags
- * @context: transfer context (unused)
- */
-static struct dma_async_tx_descriptor *bam_prep_slave_sg(struct dma_chan *chan,
-	struct scatterlist *sgl, unsigned int sg_len,
-	enum dma_transfer_direction direction, unsigned long flags,
-	void *context)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	struct bam_device *bdev = bchan->bdev;
-	struct bam_async_desc *async_desc;
-	struct scatterlist *sg;
-	u32 i;
-	struct bam_desc_hw *desc;
-	unsigned int num_alloc = 0;
-
-
-	if (!is_slave_direction(direction)) {
-		dev_err(bdev->dev, "invalid dma direction\n");
-		return NULL;
-	}
-
-	/* calculate number of required entries */
-	for_each_sg(sgl, sg, sg_len, i)
-		num_alloc += DIV_ROUND_UP(sg_dma_len(sg), BAM_MAX_DATA_SIZE);
-
-	/* allocate enough room to accomodate the number of entries */
-	async_desc = kzalloc(sizeof(*async_desc) +
-			(num_alloc * sizeof(struct bam_desc_hw)), GFP_NOWAIT);
-
-	if (!async_desc)
-		goto err_out;
-
-	if (flags & DMA_PREP_FENCE)
-		async_desc->flags |= DESC_FLAG_NWD;
-
-	if (flags & DMA_PREP_INTERRUPT)
-		async_desc->flags |= DESC_FLAG_EOT;
-	else
-		async_desc->flags |= DESC_FLAG_INT;
-
-	async_desc->num_desc = num_alloc;
-	async_desc->curr_desc = async_desc->desc;
-	async_desc->dir = direction;
-
-	/* fill in temporary descriptors */
-	desc = async_desc->desc;
-	for_each_sg(sgl, sg, sg_len, i) {
-		unsigned int remainder = sg_dma_len(sg);
-		unsigned int curr_offset = 0;
-
-		do {
-			desc->addr = sg_dma_address(sg) + curr_offset;
-
-			if (remainder > BAM_MAX_DATA_SIZE) {
-				desc->size = BAM_MAX_DATA_SIZE;
-				remainder -= BAM_MAX_DATA_SIZE;
-				curr_offset += BAM_MAX_DATA_SIZE;
-			} else {
-				desc->size = remainder;
-				remainder = 0;
-			}
-
-			async_desc->length += desc->size;
-			desc++;
-		} while (remainder > 0);
-	}
-
-	return vchan_tx_prep(&bchan->vc, &async_desc->vd, flags);
-
-err_out:
-	kfree(async_desc);
-	return NULL;
-}
-
-/**
- * bam_dma_terminate_all - terminate all transactions on a channel
- * @bchan: bam dma channel
- *
- * Dequeues and frees all transactions
- * No callbacks are done
- *
- */
-static int bam_dma_terminate_all(struct dma_chan *chan)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	unsigned long flag;
-	LIST_HEAD(head);
-
-	/* remove all transactions, including active transaction */
-	spin_lock_irqsave(&bchan->vc.lock, flag);
-	if (bchan->curr_txd) {
-		list_add(&bchan->curr_txd->vd.node, &bchan->vc.desc_issued);
-		bchan->curr_txd = NULL;
-	}
-
-	vchan_get_all_descriptors(&bchan->vc, &head);
-	spin_unlock_irqrestore(&bchan->vc.lock, flag);
-
-	vchan_dma_desc_free_list(&bchan->vc, &head);
-
-	return 0;
-}
-
-/**
- * bam_pause - Pause DMA channel
- * @chan: dma channel
- *
- */
-static int bam_pause(struct dma_chan *chan)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	struct bam_device *bdev = bchan->bdev;
-	unsigned long flag;
-
-	spin_lock_irqsave(&bchan->vc.lock, flag);
-	writel_relaxed(1, bam_addr(bdev, bchan->id, BAM_P_HALT));
-	bchan->paused = 1;
-	spin_unlock_irqrestore(&bchan->vc.lock, flag);
-
-	return 0;
-}
-
-/**
- * bam_resume - Resume DMA channel operations
- * @chan: dma channel
- *
- */
-static int bam_resume(struct dma_chan *chan)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	struct bam_device *bdev = bchan->bdev;
-	unsigned long flag;
-
-	spin_lock_irqsave(&bchan->vc.lock, flag);
-	writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_HALT));
-	bchan->paused = 0;
-	spin_unlock_irqrestore(&bchan->vc.lock, flag);
-
-	return 0;
-}
-
-/**
- * process_channel_irqs - processes the channel interrupts
- * @bdev: bam controller
- *
- * This function processes the channel interrupts
- *
- */
-static u32 process_channel_irqs(struct bam_device *bdev)
-{
-	u32 i, srcs, pipe_stts;
-	unsigned long flags;
-	struct bam_async_desc *async_desc;
-
-	srcs = readl_relaxed(bam_addr(bdev, 0, BAM_IRQ_SRCS_EE));
-
-	/* return early if no pipe/channel interrupts are present */
-	if (!(srcs & P_IRQ))
-		return srcs;
-
-	for (i = 0; i < bdev->num_channels; i++) {
-		struct bam_chan *bchan = &bdev->channels[i];
-
-		if (!(srcs & BIT(i)))
-			continue;
-
-		/* clear pipe irq */
-		pipe_stts = readl_relaxed(bam_addr(bdev, i, BAM_P_IRQ_STTS));
-
-		writel_relaxed(pipe_stts, bam_addr(bdev, i, BAM_P_IRQ_CLR));
-
-		spin_lock_irqsave(&bchan->vc.lock, flags);
-		async_desc = bchan->curr_txd;
-
-		if (async_desc) {
-			async_desc->num_desc -= async_desc->xfer_len;
-			async_desc->curr_desc += async_desc->xfer_len;
-			bchan->curr_txd = NULL;
-
-			/* manage FIFO */
-			bchan->head += async_desc->xfer_len;
-			bchan->head %= MAX_DESCRIPTORS;
-
-			/*
-			 * if complete, process cookie.  Otherwise
-			 * push back to front of desc_issued so that
-			 * it gets restarted by the tasklet
-			 */
-			if (!async_desc->num_desc)
-				vchan_cookie_complete(&async_desc->vd);
-			else
-				list_add(&async_desc->vd.node,
-					&bchan->vc.desc_issued);
-		}
-
-		spin_unlock_irqrestore(&bchan->vc.lock, flags);
-	}
-
-	return srcs;
-}
-
-/**
- * bam_dma_irq - irq handler for bam controller
- * @irq: IRQ of interrupt
- * @data: callback data
- *
- * IRQ handler for the bam controller
- */
-static irqreturn_t bam_dma_irq(int irq, void *data)
-{
-	struct bam_device *bdev = data;
-	u32 clr_mask = 0, srcs = 0;
-
-	srcs |= process_channel_irqs(bdev);
-
-	/* kick off tasklet to start next dma transfer */
-	if (srcs & P_IRQ)
-		tasklet_schedule(&bdev->task);
-
-	if (srcs & BAM_IRQ)
-		clr_mask = readl_relaxed(bam_addr(bdev, 0, BAM_IRQ_STTS));
-
-	/* don't allow reorder of the various accesses to the BAM registers */
-	mb();
-
-	writel_relaxed(clr_mask, bam_addr(bdev, 0, BAM_IRQ_CLR));
-
-	return IRQ_HANDLED;
-}
-
-/**
- * bam_tx_status - returns status of transaction
- * @chan: dma channel
- * @cookie: transaction cookie
- * @txstate: DMA transaction state
- *
- * Return status of dma transaction
- */
-static enum dma_status bam_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
-		struct dma_tx_state *txstate)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	struct virt_dma_desc *vd;
-	int ret;
-	size_t residue = 0;
-	unsigned int i;
-	unsigned long flags;
-
-	ret = dma_cookie_status(chan, cookie, txstate);
-	if (ret == DMA_COMPLETE)
-		return ret;
-
-	if (!txstate)
-		return bchan->paused ? DMA_PAUSED : ret;
-
-	spin_lock_irqsave(&bchan->vc.lock, flags);
-	vd = vchan_find_desc(&bchan->vc, cookie);
-	if (vd)
-		residue = container_of(vd, struct bam_async_desc, vd)->length;
-	else if (bchan->curr_txd && bchan->curr_txd->vd.tx.cookie == cookie)
-		for (i = 0; i < bchan->curr_txd->num_desc; i++)
-			residue += bchan->curr_txd->curr_desc[i].size;
-
-	spin_unlock_irqrestore(&bchan->vc.lock, flags);
-
-	dma_set_residue(txstate, residue);
-
-	if (ret == DMA_IN_PROGRESS && bchan->paused)
-		ret = DMA_PAUSED;
-
-	return ret;
-}
-
-/**
- * bam_apply_new_config
- * @bchan: bam dma channel
- * @dir: DMA direction
- */
-static void bam_apply_new_config(struct bam_chan *bchan,
-	enum dma_transfer_direction dir)
-{
-	struct bam_device *bdev = bchan->bdev;
-	u32 maxburst;
-
-	if (dir == DMA_DEV_TO_MEM)
-		maxburst = bchan->slave.src_maxburst;
-	else
-		maxburst = bchan->slave.dst_maxburst;
-
-	writel_relaxed(maxburst, bam_addr(bdev, 0, BAM_DESC_CNT_TRSHLD));
-
-	bchan->reconfigure = 0;
-}
-
-/**
- * bam_start_dma - start next transaction
- * @bchan - bam dma channel
- */
-static void bam_start_dma(struct bam_chan *bchan)
-{
-	struct virt_dma_desc *vd = vchan_next_desc(&bchan->vc);
-	struct bam_device *bdev = bchan->bdev;
-	struct bam_async_desc *async_desc;
-	struct bam_desc_hw *desc;
-	struct bam_desc_hw *fifo = PTR_ALIGN(bchan->fifo_virt,
-					sizeof(struct bam_desc_hw));
-
-	lockdep_assert_held(&bchan->vc.lock);
-
-	if (!vd)
-		return;
-
-	list_del(&vd->node);
-
-	async_desc = container_of(vd, struct bam_async_desc, vd);
-	bchan->curr_txd = async_desc;
-
-	/* on first use, initialize the channel hardware */
-	if (!bchan->initialized)
-		bam_chan_init_hw(bchan, async_desc->dir);
-
-	/* apply new slave config changes, if necessary */
-	if (bchan->reconfigure)
-		bam_apply_new_config(bchan, async_desc->dir);
-
-	desc = bchan->curr_txd->curr_desc;
-
-	if (async_desc->num_desc > MAX_DESCRIPTORS)
-		async_desc->xfer_len = MAX_DESCRIPTORS;
-	else
-		async_desc->xfer_len = async_desc->num_desc;
-
-	/* set any special flags on the last descriptor */
-	if (async_desc->num_desc == async_desc->xfer_len)
-		desc[async_desc->xfer_len - 1].flags = async_desc->flags;
-	else
-		desc[async_desc->xfer_len - 1].flags |= DESC_FLAG_INT;
-
-	if (bchan->tail + async_desc->xfer_len > MAX_DESCRIPTORS) {
-		u32 partial = MAX_DESCRIPTORS - bchan->tail;
-
-		memcpy(&fifo[bchan->tail], desc,
-				partial * sizeof(struct bam_desc_hw));
-		memcpy(fifo, &desc[partial], (async_desc->xfer_len - partial) *
-				sizeof(struct bam_desc_hw));
-	} else {
-		memcpy(&fifo[bchan->tail], desc,
-			async_desc->xfer_len * sizeof(struct bam_desc_hw));
-	}
-
-	bchan->tail += async_desc->xfer_len;
-	bchan->tail %= MAX_DESCRIPTORS;
-
-	/* ensure descriptor writes and dma start not reordered */
-	wmb();
-	writel_relaxed(bchan->tail * sizeof(struct bam_desc_hw),
-			bam_addr(bdev, bchan->id, BAM_P_EVNT_REG));
-}
-
-/**
- * dma_tasklet - DMA IRQ tasklet
- * @data: tasklet argument (bam controller structure)
- *
- * Sets up next DMA operation and then processes all completed transactions
- */
-static void dma_tasklet(unsigned long data)
-{
-	struct bam_device *bdev = (struct bam_device *)data;
-	struct bam_chan *bchan;
-	unsigned long flags;
-	unsigned int i;
-
-	/* go through the channels and kick off transactions */
-	for (i = 0; i < bdev->num_channels; i++) {
-		bchan = &bdev->channels[i];
-		spin_lock_irqsave(&bchan->vc.lock, flags);
-
-		if (!list_empty(&bchan->vc.desc_issued) && !bchan->curr_txd)
-			bam_start_dma(bchan);
-		spin_unlock_irqrestore(&bchan->vc.lock, flags);
-	}
-}
-
-/**
- * bam_issue_pending - starts pending transactions
- * @chan: dma channel
- *
- * Calls tasklet directly which in turn starts any pending transactions
- */
-static void bam_issue_pending(struct dma_chan *chan)
-{
-	struct bam_chan *bchan = to_bam_chan(chan);
-	unsigned long flags;
-
-	spin_lock_irqsave(&bchan->vc.lock, flags);
-
-	/* if work pending and idle, start a transaction */
-	if (vchan_issue_pending(&bchan->vc) && !bchan->curr_txd)
-		bam_start_dma(bchan);
-
-	spin_unlock_irqrestore(&bchan->vc.lock, flags);
-}
-
-/**
- * bam_dma_free_desc - free descriptor memory
- * @vd: virtual descriptor
- *
- */
-static void bam_dma_free_desc(struct virt_dma_desc *vd)
-{
-	struct bam_async_desc *async_desc = container_of(vd,
-			struct bam_async_desc, vd);
-
-	kfree(async_desc);
-}
-
-static struct dma_chan *bam_dma_xlate(struct of_phandle_args *dma_spec,
-		struct of_dma *of)
-{
-	struct bam_device *bdev = container_of(of->of_dma_data,
-					struct bam_device, common);
-	unsigned int request;
-
-	if (dma_spec->args_count != 1)
-		return NULL;
-
-	request = dma_spec->args[0];
-	if (request >= bdev->num_channels)
-		return NULL;
-
-	return dma_get_slave_channel(&(bdev->channels[request].vc.chan));
-}
-
-/**
- * bam_init
- * @bdev: bam device
- *
- * Initialization helper for global bam registers
- */
-static int bam_init(struct bam_device *bdev)
-{
-	u32 val;
-
-	/* read revision and configuration information */
-	val = readl_relaxed(bam_addr(bdev, 0, BAM_REVISION)) >> NUM_EES_SHIFT;
-	val &= NUM_EES_MASK;
-
-	/* check that configured EE is within range */
-	if (bdev->ee >= val)
-		return -EINVAL;
-
-	val = readl_relaxed(bam_addr(bdev, 0, BAM_NUM_PIPES));
-	bdev->num_channels = val & BAM_NUM_PIPES_MASK;
-
-	/* s/w reset bam */
-	/* after reset all pipes are disabled and idle */
-	val = readl_relaxed(bam_addr(bdev, 0, BAM_CTRL));
-	val |= BAM_SW_RST;
-	writel_relaxed(val, bam_addr(bdev, 0, BAM_CTRL));
-	val &= ~BAM_SW_RST;
-	writel_relaxed(val, bam_addr(bdev, 0, BAM_CTRL));
-
-	/* make sure previous stores are visible before enabling BAM */
-	wmb();
-
-	/* enable bam */
-	val |= BAM_EN;
-	writel_relaxed(val, bam_addr(bdev, 0, BAM_CTRL));
-
-	/* set descriptor threshhold, start with 4 bytes */
-	writel_relaxed(DEFAULT_CNT_THRSHLD,
-			bam_addr(bdev, 0, BAM_DESC_CNT_TRSHLD));
-
-	/* Enable default set of h/w workarounds, ie all except BAM_FULL_PIPE */
-	writel_relaxed(BAM_CNFG_BITS_DEFAULT, bam_addr(bdev, 0, BAM_CNFG_BITS));
-
-	/* enable irqs for errors */
-	writel_relaxed(BAM_ERROR_EN | BAM_HRESP_ERR_EN,
-			bam_addr(bdev, 0, BAM_IRQ_EN));
-
-	/* unmask global bam interrupt */
-	writel_relaxed(BAM_IRQ_MSK, bam_addr(bdev, 0, BAM_IRQ_SRCS_MSK_EE));
-
-	return 0;
-}
-
-static void bam_channel_init(struct bam_device *bdev, struct bam_chan *bchan,
-	u32 index)
-{
-	bchan->id = index;
-	bchan->bdev = bdev;
-
-	vchan_init(&bchan->vc, &bdev->common);
-	bchan->vc.desc_free = bam_dma_free_desc;
-}
-
-static const struct of_device_id bam_of_match[] = {
-	{ .compatible = "qcom,bam-v1.3.0", .data = &bam_v1_3_reg_info },
-	{ .compatible = "qcom,bam-v1.4.0", .data = &bam_v1_4_reg_info },
-	{ .compatible = "qcom,bam-v1.7.0", .data = &bam_v1_7_reg_info },
-	{}
-};
-
-MODULE_DEVICE_TABLE(of, bam_of_match);
-
-static int bam_dma_probe(struct platform_device *pdev)
-{
-	struct bam_device *bdev;
-	const struct of_device_id *match;
-	struct resource *iores;
-	int ret, i;
-
-	bdev = devm_kzalloc(&pdev->dev, sizeof(*bdev), GFP_KERNEL);
-	if (!bdev)
-		return -ENOMEM;
-
-	bdev->dev = &pdev->dev;
-
-	match = of_match_node(bam_of_match, pdev->dev.of_node);
-	if (!match) {
-		dev_err(&pdev->dev, "Unsupported BAM module\n");
-		return -ENODEV;
-	}
-
-	bdev->layout = match->data;
-
-	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	bdev->regs = devm_ioremap_resource(&pdev->dev, iores);
-	if (IS_ERR(bdev->regs))
-		return PTR_ERR(bdev->regs);
-
-	bdev->irq = platform_get_irq(pdev, 0);
-	if (bdev->irq < 0)
-		return bdev->irq;
-
-	ret = of_property_read_u32(pdev->dev.of_node, "qcom,ee", &bdev->ee);
-	if (ret) {
-		dev_err(bdev->dev, "Execution environment unspecified\n");
-		return ret;
-	}
-
-	bdev->bamclk = devm_clk_get(bdev->dev, "bam_clk");
-	if (IS_ERR(bdev->bamclk))
-		return PTR_ERR(bdev->bamclk);
-
-	ret = clk_prepare_enable(bdev->bamclk);
-	if (ret) {
-		dev_err(bdev->dev, "failed to prepare/enable clock\n");
-		return ret;
-	}
-
-	ret = bam_init(bdev);
-	if (ret)
-		goto err_disable_clk;
-
-	tasklet_init(&bdev->task, dma_tasklet, (unsigned long)bdev);
-
-	bdev->channels = devm_kcalloc(bdev->dev, bdev->num_channels,
-				sizeof(*bdev->channels), GFP_KERNEL);
-
-	if (!bdev->channels) {
-		ret = -ENOMEM;
-		goto err_tasklet_kill;
-	}
-
-	/* allocate and initialize channels */
-	INIT_LIST_HEAD(&bdev->common.channels);
-
-	for (i = 0; i < bdev->num_channels; i++)
-		bam_channel_init(bdev, &bdev->channels[i], i);
-
-	ret = devm_request_irq(bdev->dev, bdev->irq, bam_dma_irq,
-			IRQF_TRIGGER_HIGH, "bam_dma", bdev);
-	if (ret)
-		goto err_bam_channel_exit;
-
-	/* set max dma segment size */
-	bdev->common.dev = bdev->dev;
-	bdev->common.dev->dma_parms = &bdev->dma_parms;
-	ret = dma_set_max_seg_size(bdev->common.dev, BAM_MAX_DATA_SIZE);
-	if (ret) {
-		dev_err(bdev->dev, "cannot set maximum segment size\n");
-		goto err_bam_channel_exit;
-	}
-
-	platform_set_drvdata(pdev, bdev);
-
-	/* set capabilities */
-	dma_cap_zero(bdev->common.cap_mask);
-	dma_cap_set(DMA_SLAVE, bdev->common.cap_mask);
-
-	/* initialize dmaengine apis */
-	bdev->common.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
-	bdev->common.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
-	bdev->common.src_addr_widths = DMA_SLAVE_BUSWIDTH_4_BYTES;
-	bdev->common.dst_addr_widths = DMA_SLAVE_BUSWIDTH_4_BYTES;
-	bdev->common.device_alloc_chan_resources = bam_alloc_chan;
-	bdev->common.device_free_chan_resources = bam_free_chan;
-	bdev->common.device_prep_slave_sg = bam_prep_slave_sg;
-	bdev->common.device_config = bam_slave_config;
-	bdev->common.device_pause = bam_pause;
-	bdev->common.device_resume = bam_resume;
-	bdev->common.device_terminate_all = bam_dma_terminate_all;
-	bdev->common.device_issue_pending = bam_issue_pending;
-	bdev->common.device_tx_status = bam_tx_status;
-	bdev->common.dev = bdev->dev;
-
-	ret = dma_async_device_register(&bdev->common);
-	if (ret) {
-		dev_err(bdev->dev, "failed to register dma async device\n");
-		goto err_bam_channel_exit;
-	}
-
-	ret = of_dma_controller_register(pdev->dev.of_node, bam_dma_xlate,
-					&bdev->common);
-	if (ret)
-		goto err_unregister_dma;
-
-	return 0;
-
-err_unregister_dma:
-	dma_async_device_unregister(&bdev->common);
-err_bam_channel_exit:
-	for (i = 0; i < bdev->num_channels; i++)
-		tasklet_kill(&bdev->channels[i].vc.task);
-err_tasklet_kill:
-	tasklet_kill(&bdev->task);
-err_disable_clk:
-	clk_disable_unprepare(bdev->bamclk);
-
-	return ret;
-}
-
-static int bam_dma_remove(struct platform_device *pdev)
-{
-	struct bam_device *bdev = platform_get_drvdata(pdev);
-	u32 i;
-
-	of_dma_controller_free(pdev->dev.of_node);
-	dma_async_device_unregister(&bdev->common);
-
-	/* mask all interrupts for this execution environment */
-	writel_relaxed(0, bam_addr(bdev, 0,  BAM_IRQ_SRCS_MSK_EE));
-
-	devm_free_irq(bdev->dev, bdev->irq, bdev);
-
-	for (i = 0; i < bdev->num_channels; i++) {
-		bam_dma_terminate_all(&bdev->channels[i].vc.chan);
-		tasklet_kill(&bdev->channels[i].vc.task);
-
-		dma_free_writecombine(bdev->dev, BAM_DESC_FIFO_SIZE,
-			bdev->channels[i].fifo_virt,
-			bdev->channels[i].fifo_phys);
-	}
-
-	tasklet_kill(&bdev->task);
-
-	clk_disable_unprepare(bdev->bamclk);
-
-	return 0;
-}
-
-static struct platform_driver bam_dma_driver = {
-	.probe = bam_dma_probe,
-	.remove = bam_dma_remove,
-	.driver = {
-		.name = "bam-dma-engine",
-		.of_match_table = bam_of_match,
-	},
-};
-
-module_platform_driver(bam_dma_driver);
-
-MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
-MODULE_DESCRIPTION("QCOM BAM DMA engine driver");
-MODULE_LICENSE("GPL v2");