1 files changed, 0 insertions, 964 deletions

diff --git a/target/linux/ipq806x/patches-4.4/156-dmaengine-Add-ADM-driver.patch b/target/linux/ipq806x/patches-4.4/156-dmaengine-Add-ADM-driver.patch
deleted file mode 100644
index 02038aa942..0000000000
--- a/target/linux/ipq806x/patches-4.4/156-dmaengine-Add-ADM-driver.patch
+++ /dev/null
@@ -1,964 +0,0 @@
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: [v6,2/2] dmaengine: Add ADM driver
-From: Andy Gross <agross@codeaurora.org>
-X-Patchwork-Id: 6027351
-Message-Id: <1426571172-9711-3-git-send-email-agross@codeaurora.org>
-To: Vinod Koul <vinod.koul@intel.com>
-Cc: devicetree@vger.kernel.org, dmaengine@vger.kernel.org,
-	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
-	linux-arm-kernel@lists.infradead.org, Kumar Gala <galak@codeaurora.org>,
-	Bjorn Andersson <bjorn.andersson@sonymobile.com>,
-	Andy Gross <agross@codeaurora.org>
-Date: Tue, 17 Mar 2015 00:46:12 -0500
-
-Add the DMA engine driver for the QCOM Application Data Mover (ADM) DMA
-controller found in the MSM8x60 and IPQ/APQ8064 platforms.
-
-The ADM supports both memory to memory transactions and memory
-to/from peripheral device transactions.  The controller also provides flow
-control capabilities for transactions to/from peripheral devices.
-
-The initial release of this driver supports slave transfers to/from peripherals
-and also incorporates CRCI (client rate control interface) flow control.
-
-Signed-off-by: Andy Gross <agross@codeaurora.org>
-Reviewed-by: sricharan <sricharan@codeaurora.org>
-
----
-drivers/dma/Kconfig    |   10 +
- drivers/dma/Makefile   |    1 +
- drivers/dma/qcom_adm.c |  900 ++++++++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 911 insertions(+)
- create mode 100644 drivers/dma/qcom_adm.c
-
---- a/drivers/dma/Kconfig
-+++ b/drivers/dma/Kconfig
-@@ -558,4 +558,14 @@ config DMATEST
- config DMA_ENGINE_RAID
- 	bool
- 
-+config QCOM_ADM
-+	tristate "Qualcomm ADM support"
-+	depends on ARCH_QCOM || (COMPILE_TEST && OF && ARM)
-+	select DMA_ENGINE
-+	select DMA_VIRTUAL_CHANNELS
-+	---help---
-+	  Enable support for the Qualcomm ADM DMA controller.  This controller
-+	  provides DMA capabilities for both general purpose and on-chip
-+	  peripheral devices.
-+
- endif
---- /dev/null
-+++ b/drivers/dma/qcom_adm.c
-@@ -0,0 +1,900 @@
-+/*
-+ * Copyright (c) 2013-2015, 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.
-+ *
-+ */
-+
-+#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/reset.h>
-+#include <linux/clk.h>
-+#include <linux/dmaengine.h>
-+
-+#include "dmaengine.h"
-+#include "virt-dma.h"
-+
-+/* ADM registers - calculated from channel number and security domain */
-+#define ADM_CHAN_MULTI			0x4
-+#define ADM_CI_MULTI			0x4
-+#define ADM_CRCI_MULTI			0x4
-+#define ADM_EE_MULTI			0x800
-+#define ADM_CHAN_OFFS(chan)		(ADM_CHAN_MULTI * chan)
-+#define ADM_EE_OFFS(ee)			(ADM_EE_MULTI * ee)
-+#define ADM_CHAN_EE_OFFS(chan, ee)	(ADM_CHAN_OFFS(chan) + ADM_EE_OFFS(ee))
-+#define ADM_CHAN_OFFS(chan)		(ADM_CHAN_MULTI * chan)
-+#define ADM_CI_OFFS(ci)			(ADM_CHAN_OFF(ci))
-+#define ADM_CH_CMD_PTR(chan, ee)	(ADM_CHAN_EE_OFFS(chan, ee))
-+#define ADM_CH_RSLT(chan, ee)		(0x40 + ADM_CHAN_EE_OFFS(chan, ee))
-+#define ADM_CH_FLUSH_STATE0(chan, ee)	(0x80 + ADM_CHAN_EE_OFFS(chan, ee))
-+#define ADM_CH_STATUS_SD(chan, ee)	(0x200 + ADM_CHAN_EE_OFFS(chan, ee))
-+#define ADM_CH_CONF(chan)		(0x240 + ADM_CHAN_OFFS(chan))
-+#define ADM_CH_RSLT_CONF(chan, ee)	(0x300 + ADM_CHAN_EE_OFFS(chan, ee))
-+#define ADM_SEC_DOMAIN_IRQ_STATUS(ee)	(0x380 + ADM_EE_OFFS(ee))
-+#define ADM_CI_CONF(ci)			(0x390 + ci * ADM_CI_MULTI)
-+#define ADM_GP_CTL			0x3d8
-+#define ADM_CRCI_CTL(crci, ee)		(0x400 + crci * ADM_CRCI_MULTI + \
-+						ADM_EE_OFFS(ee))
-+
-+/* channel status */
-+#define ADM_CH_STATUS_VALID	BIT(1)
-+
-+/* channel result */
-+#define ADM_CH_RSLT_VALID	BIT(31)
-+#define ADM_CH_RSLT_ERR		BIT(3)
-+#define ADM_CH_RSLT_FLUSH	BIT(2)
-+#define ADM_CH_RSLT_TPD		BIT(1)
-+
-+/* channel conf */
-+#define ADM_CH_CONF_SHADOW_EN		BIT(12)
-+#define ADM_CH_CONF_MPU_DISABLE		BIT(11)
-+#define ADM_CH_CONF_PERM_MPU_CONF	BIT(9)
-+#define ADM_CH_CONF_FORCE_RSLT_EN	BIT(7)
-+#define ADM_CH_CONF_SEC_DOMAIN(ee)	(((ee & 0x3) << 4) | ((ee & 0x4) << 11))
-+
-+/* channel result conf */
-+#define ADM_CH_RSLT_CONF_FLUSH_EN	BIT(1)
-+#define ADM_CH_RSLT_CONF_IRQ_EN		BIT(0)
-+
-+/* CRCI CTL */
-+#define ADM_CRCI_CTL_MUX_SEL	BIT(18)
-+#define ADM_CRCI_CTL_RST	BIT(17)
-+
-+/* CI configuration */
-+#define ADM_CI_RANGE_END(x)	(x << 24)
-+#define ADM_CI_RANGE_START(x)	(x << 16)
-+#define ADM_CI_BURST_4_WORDS	BIT(2)
-+#define ADM_CI_BURST_8_WORDS	BIT(3)
-+
-+/* GP CTL */
-+#define ADM_GP_CTL_LP_EN	BIT(12)
-+#define ADM_GP_CTL_LP_CNT(x)	(x << 8)
-+
-+/* Command pointer list entry */
-+#define ADM_CPLE_LP		BIT(31)
-+#define ADM_CPLE_CMD_PTR_LIST	BIT(29)
-+
-+/* Command list entry */
-+#define ADM_CMD_LC		BIT(31)
-+#define ADM_CMD_DST_CRCI(n)	(((n) & 0xf) << 7)
-+#define ADM_CMD_SRC_CRCI(n)	(((n) & 0xf) << 3)
-+
-+#define ADM_CMD_TYPE_SINGLE	0x0
-+#define ADM_CMD_TYPE_BOX	0x3
-+
-+#define ADM_CRCI_MUX_SEL	BIT(4)
-+#define ADM_DESC_ALIGN		8
-+#define ADM_MAX_XFER		(SZ_64K-1)
-+#define ADM_MAX_ROWS		(SZ_64K-1)
-+#define ADM_MAX_CHANNELS	16
-+
-+struct adm_desc_hw_box {
-+	u32 cmd;
-+	u32 src_addr;
-+	u32 dst_addr;
-+	u32 row_len;
-+	u32 num_rows;
-+	u32 row_offset;
-+};
-+
-+struct adm_desc_hw_single {
-+	u32 cmd;
-+	u32 src_addr;
-+	u32 dst_addr;
-+	u32 len;
-+};
-+
-+struct adm_async_desc {
-+	struct virt_dma_desc vd;
-+	struct adm_device *adev;
-+
-+	size_t length;
-+	enum dma_transfer_direction dir;
-+	dma_addr_t dma_addr;
-+	size_t dma_len;
-+
-+	void *cpl;
-+	dma_addr_t cp_addr;
-+	u32 crci;
-+	u32 mux;
-+	u32 blk_size;
-+};
-+
-+struct adm_chan {
-+	struct virt_dma_chan vc;
-+	struct adm_device *adev;
-+
-+	/* parsed from DT */
-+	u32 id;			/* channel id */
-+
-+	struct adm_async_desc *curr_txd;
-+	struct dma_slave_config slave;
-+	struct list_head node;
-+
-+	int error;
-+	int initialized;
-+};
-+
-+static inline struct adm_chan *to_adm_chan(struct dma_chan *common)
-+{
-+	return container_of(common, struct adm_chan, vc.chan);
-+}
-+
-+struct adm_device {
-+	void __iomem *regs;
-+	struct device *dev;
-+	struct dma_device common;
-+	struct device_dma_parameters dma_parms;
-+	struct adm_chan *channels;
-+
-+	u32 ee;
-+
-+	struct clk *core_clk;
-+	struct clk *iface_clk;
-+
-+	struct reset_control *clk_reset;
-+	struct reset_control *c0_reset;
-+	struct reset_control *c1_reset;
-+	struct reset_control *c2_reset;
-+	int irq;
-+};
-+
-+/**
-+ * adm_free_chan - Frees dma resources associated with the specific channel
-+ *
-+ * Free all allocated descriptors associated with this channel
-+ *
-+ */
-+static void adm_free_chan(struct dma_chan *chan)
-+{
-+	/* free all queued descriptors */
-+	vchan_free_chan_resources(to_virt_chan(chan));
-+}
-+
-+/**
-+ * adm_get_blksize - Get block size from burst value
-+ *
-+ */
-+static int adm_get_blksize(unsigned int burst)
-+{
-+	int ret;
-+
-+	switch (burst) {
-+	case 16:
-+	case 32:
-+	case 64:
-+	case 128:
-+		ret = ffs(burst>>4) - 1;
-+		break;
-+	case 192:
-+		ret = 4;
-+		break;
-+	case 256:
-+		ret = 5;
-+		break;
-+	default:
-+		ret = -EINVAL;
-+		break;
-+	}
-+
-+	return ret;
-+}
-+
-+/**
-+ * adm_process_fc_descriptors - Process descriptors for flow controlled xfers
-+ *
-+ * @achan: ADM channel
-+ * @desc: Descriptor memory pointer
-+ * @sg: Scatterlist entry
-+ * @crci: CRCI value
-+ * @burst: Burst size of transaction
-+ * @direction: DMA transfer direction
-+ */
-+static void *adm_process_fc_descriptors(struct adm_chan *achan,
-+	void *desc, struct scatterlist *sg, u32 crci, u32 burst,
-+	enum dma_transfer_direction direction)
-+{
-+	struct adm_desc_hw_box *box_desc = NULL;
-+	struct adm_desc_hw_single *single_desc;
-+	u32 remainder = sg_dma_len(sg);
-+	u32 rows, row_offset, crci_cmd;
-+	u32 mem_addr = sg_dma_address(sg);
-+	u32 *incr_addr = &mem_addr;
-+	u32 *src, *dst;
-+
-+	if (direction == DMA_DEV_TO_MEM) {
-+		crci_cmd = ADM_CMD_SRC_CRCI(crci);
-+		row_offset = burst;
-+		src = &achan->slave.src_addr;
-+		dst = &mem_addr;
-+	} else {
-+		crci_cmd = ADM_CMD_DST_CRCI(crci);
-+		row_offset = burst << 16;
-+		src = &mem_addr;
-+		dst = &achan->slave.dst_addr;
-+	}
-+
-+	while (remainder >= burst) {
-+		box_desc = desc;
-+		box_desc->cmd = ADM_CMD_TYPE_BOX | crci_cmd;
-+		box_desc->row_offset = row_offset;
-+		box_desc->src_addr = *src;
-+		box_desc->dst_addr = *dst;
-+
-+		rows = remainder / burst;
-+		rows = min_t(u32, rows, ADM_MAX_ROWS);
-+		box_desc->num_rows = rows << 16 | rows;
-+		box_desc->row_len = burst << 16 | burst;
-+
-+		*incr_addr += burst * rows;
-+		remainder -= burst * rows;
-+		desc += sizeof(*box_desc);
-+	}
-+
-+	/* if leftover bytes, do one single descriptor */
-+	if (remainder) {
-+		single_desc = desc;
-+		single_desc->cmd = ADM_CMD_TYPE_SINGLE | crci_cmd;
-+		single_desc->len = remainder;
-+		single_desc->src_addr = *src;
-+		single_desc->dst_addr = *dst;
-+		desc += sizeof(*single_desc);
-+
-+		if (sg_is_last(sg))
-+			single_desc->cmd |= ADM_CMD_LC;
-+	} else {
-+		if (box_desc && sg_is_last(sg))
-+			box_desc->cmd |= ADM_CMD_LC;
-+	}
-+
-+	return desc;
-+}
-+
-+/**
-+ * adm_process_non_fc_descriptors - Process descriptors for non-fc xfers
-+ *
-+ * @achan: ADM channel
-+ * @desc: Descriptor memory pointer
-+ * @sg: Scatterlist entry
-+ * @direction: DMA transfer direction
-+ */
-+static void *adm_process_non_fc_descriptors(struct adm_chan *achan,
-+	void *desc, struct scatterlist *sg,
-+	enum dma_transfer_direction direction)
-+{
-+	struct adm_desc_hw_single *single_desc;
-+	u32 remainder = sg_dma_len(sg);
-+	u32 mem_addr = sg_dma_address(sg);
-+	u32 *incr_addr = &mem_addr;
-+	u32 *src, *dst;
-+
-+	if (direction == DMA_DEV_TO_MEM) {
-+		src = &achan->slave.src_addr;
-+		dst = &mem_addr;
-+	} else {
-+		src = &mem_addr;
-+		dst = &achan->slave.dst_addr;
-+	}
-+
-+	do {
-+		single_desc = desc;
-+		single_desc->cmd = ADM_CMD_TYPE_SINGLE;
-+		single_desc->src_addr = *src;
-+		single_desc->dst_addr = *dst;
-+		single_desc->len = (remainder > ADM_MAX_XFER) ?
-+				ADM_MAX_XFER : remainder;
-+
-+		remainder -= single_desc->len;
-+		*incr_addr += single_desc->len;
-+		desc += sizeof(*single_desc);
-+	} while (remainder);
-+
-+	/* set last command if this is the end of the whole transaction */
-+	if (sg_is_last(sg))
-+		single_desc->cmd |= ADM_CMD_LC;
-+
-+	return desc;
-+}
-+
-+/**
-+ * adm_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 *adm_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 adm_chan *achan = to_adm_chan(chan);
-+	struct adm_device *adev = achan->adev;
-+	struct adm_async_desc *async_desc;
-+	struct scatterlist *sg;
-+	u32 i, burst;
-+	u32 single_count = 0, box_count = 0, crci = 0;
-+	void *desc;
-+	u32 *cple;
-+	int blk_size = 0;
-+
-+	if (!is_slave_direction(direction)) {
-+		dev_err(adev->dev, "invalid dma direction\n");
-+		return NULL;
-+	}
-+
-+	/*
-+	 * get burst value from slave configuration
-+	 */
-+	burst = (direction == DMA_MEM_TO_DEV) ?
-+		achan->slave.dst_maxburst :
-+		achan->slave.src_maxburst;
-+
-+	/* if using flow control, validate burst and crci values */
-+	if (achan->slave.device_fc) {
-+
-+		blk_size = adm_get_blksize(burst);
-+		if (blk_size < 0) {
-+			dev_err(adev->dev, "invalid burst value: %d\n",
-+				burst);
-+			return ERR_PTR(-EINVAL);
-+		}
-+
-+		crci = achan->slave.slave_id & 0xf;
-+		if (!crci || achan->slave.slave_id > 0x1f) {
-+			dev_err(adev->dev, "invalid crci value\n");
-+			return ERR_PTR(-EINVAL);
-+		}
-+	}
-+
-+	/* iterate through sgs and compute allocation size of structures */
-+	for_each_sg(sgl, sg, sg_len, i) {
-+		if (achan->slave.device_fc) {
-+			box_count += DIV_ROUND_UP(sg_dma_len(sg) / burst,
-+						  ADM_MAX_ROWS);
-+			if (sg_dma_len(sg) % burst)
-+				single_count++;
-+		} else {
-+			single_count += DIV_ROUND_UP(sg_dma_len(sg),
-+						     ADM_MAX_XFER);
-+		}
-+	}
-+
-+	async_desc = kzalloc(sizeof(*async_desc), GFP_NOWAIT);
-+	if (!async_desc)
-+		return ERR_PTR(-ENOMEM);
-+
-+	if (crci)
-+		async_desc->mux = achan->slave.slave_id & ADM_CRCI_MUX_SEL ?
-+					ADM_CRCI_CTL_MUX_SEL : 0;
-+	async_desc->crci = crci;
-+	async_desc->blk_size = blk_size;
-+	async_desc->dma_len = single_count * sizeof(struct adm_desc_hw_single) +
-+				box_count * sizeof(struct adm_desc_hw_box) +
-+				sizeof(*cple) + 2 * ADM_DESC_ALIGN;
-+
-+	async_desc->cpl = dma_alloc_writecombine(adev->dev, async_desc->dma_len,
-+				&async_desc->dma_addr, GFP_NOWAIT);
-+
-+	if (!async_desc->cpl) {
-+		kfree(async_desc);
-+		return ERR_PTR(-ENOMEM);
-+	}
-+
-+	async_desc->adev = adev;
-+
-+	/* both command list entry and descriptors must be 8 byte aligned */
-+	cple = PTR_ALIGN(async_desc->cpl, ADM_DESC_ALIGN);
-+	desc = PTR_ALIGN(cple + 1, ADM_DESC_ALIGN);
-+
-+	/* init cmd list */
-+	*cple = ADM_CPLE_LP;
-+	*cple |= (desc - async_desc->cpl + async_desc->dma_addr) >> 3;
-+
-+	for_each_sg(sgl, sg, sg_len, i) {
-+		async_desc->length += sg_dma_len(sg);
-+
-+		if (achan->slave.device_fc)
-+			desc = adm_process_fc_descriptors(achan, desc, sg, crci,
-+							burst, direction);
-+		else
-+			desc = adm_process_non_fc_descriptors(achan, desc, sg,
-+							   direction);
-+	}
-+
-+	return vchan_tx_prep(&achan->vc, &async_desc->vd, flags);
-+}
-+
-+/**
-+ * adm_terminate_all - terminate all transactions on a channel
-+ * @achan: adm dma channel
-+ *
-+ * Dequeues and frees all transactions, aborts current transaction
-+ * No callbacks are done
-+ *
-+ */
-+static int adm_terminate_all(struct dma_chan *chan)
-+{
-+	struct adm_chan *achan = to_adm_chan(chan);
-+	struct adm_device *adev = achan->adev;
-+	unsigned long flags;
-+	LIST_HEAD(head);
-+
-+	spin_lock_irqsave(&achan->vc.lock, flags);
-+	vchan_get_all_descriptors(&achan->vc, &head);
-+
-+	/* send flush command to terminate current transaction */
-+	writel_relaxed(0x0,
-+		adev->regs + ADM_CH_FLUSH_STATE0(achan->id, adev->ee));
-+
-+	spin_unlock_irqrestore(&achan->vc.lock, flags);
-+
-+	vchan_dma_desc_free_list(&achan->vc, &head);
-+
-+	return 0;
-+}
-+
-+static int adm_slave_config(struct dma_chan *chan, struct dma_slave_config *cfg)
-+{
-+	struct adm_chan *achan = to_adm_chan(chan);
-+	unsigned long flag;
-+
-+	spin_lock_irqsave(&achan->vc.lock, flag);
-+	memcpy(&achan->slave, cfg, sizeof(struct dma_slave_config));
-+	spin_unlock_irqrestore(&achan->vc.lock, flag);
-+
-+	return 0;
-+}
-+
-+/**
-+ * adm_start_dma - start next transaction
-+ * @achan - ADM dma channel
-+ */
-+static void adm_start_dma(struct adm_chan *achan)
-+{
-+	struct virt_dma_desc *vd = vchan_next_desc(&achan->vc);
-+	struct adm_device *adev = achan->adev;
-+	struct adm_async_desc *async_desc;
-+
-+	lockdep_assert_held(&achan->vc.lock);
-+
-+	if (!vd)
-+		return;
-+
-+	list_del(&vd->node);
-+
-+	/* write next command list out to the CMD FIFO */
-+	async_desc = container_of(vd, struct adm_async_desc, vd);
-+	achan->curr_txd = async_desc;
-+
-+	/* reset channel error */
-+	achan->error = 0;
-+
-+	if (!achan->initialized) {
-+		/* enable interrupts */
-+		writel(ADM_CH_CONF_SHADOW_EN |
-+		       ADM_CH_CONF_PERM_MPU_CONF |
-+		       ADM_CH_CONF_MPU_DISABLE |
-+		       ADM_CH_CONF_SEC_DOMAIN(adev->ee),
-+		       adev->regs + ADM_CH_CONF(achan->id));
-+
-+		writel(ADM_CH_RSLT_CONF_IRQ_EN | ADM_CH_RSLT_CONF_FLUSH_EN,
-+			adev->regs + ADM_CH_RSLT_CONF(achan->id, adev->ee));
-+
-+		achan->initialized = 1;
-+	}
-+
-+	/* set the crci block size if this transaction requires CRCI */
-+	if (async_desc->crci) {
-+		writel(async_desc->mux | async_desc->blk_size,
-+			adev->regs + ADM_CRCI_CTL(async_desc->crci, adev->ee));
-+	}
-+
-+	/* make sure IRQ enable doesn't get reordered */
-+	wmb();
-+
-+	/* write next command list out to the CMD FIFO */
-+	writel(ALIGN(async_desc->dma_addr, ADM_DESC_ALIGN) >> 3,
-+		adev->regs + ADM_CH_CMD_PTR(achan->id, adev->ee));
-+}
-+
-+/**
-+ * adm_dma_irq - irq handler for ADM controller
-+ * @irq: IRQ of interrupt
-+ * @data: callback data
-+ *
-+ * IRQ handler for the bam controller
-+ */
-+static irqreturn_t adm_dma_irq(int irq, void *data)
-+{
-+	struct adm_device *adev = data;
-+	u32 srcs, i;
-+	struct adm_async_desc *async_desc;
-+	unsigned long flags;
-+
-+	srcs = readl_relaxed(adev->regs +
-+			ADM_SEC_DOMAIN_IRQ_STATUS(adev->ee));
-+
-+	for (i = 0; i < ADM_MAX_CHANNELS; i++) {
-+		struct adm_chan *achan = &adev->channels[i];
-+		u32 status, result;
-+
-+		if (srcs & BIT(i)) {
-+			status = readl_relaxed(adev->regs +
-+				ADM_CH_STATUS_SD(i, adev->ee));
-+
-+			/* if no result present, skip */
-+			if (!(status & ADM_CH_STATUS_VALID))
-+				continue;
-+
-+			result = readl_relaxed(adev->regs +
-+				ADM_CH_RSLT(i, adev->ee));
-+
-+			/* no valid results, skip */
-+			if (!(result & ADM_CH_RSLT_VALID))
-+				continue;
-+
-+			/* flag error if transaction was flushed or failed */
-+			if (result & (ADM_CH_RSLT_ERR | ADM_CH_RSLT_FLUSH))
-+				achan->error = 1;
-+
-+			spin_lock_irqsave(&achan->vc.lock, flags);
-+			async_desc = achan->curr_txd;
-+
-+			achan->curr_txd = NULL;
-+
-+			if (async_desc) {
-+				vchan_cookie_complete(&async_desc->vd);
-+
-+				/* kick off next DMA */
-+				adm_start_dma(achan);
-+			}
-+
-+			spin_unlock_irqrestore(&achan->vc.lock, flags);
-+		}
-+	}
-+
-+	return IRQ_HANDLED;
-+}
-+
-+/**
-+ * adm_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 adm_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
-+	struct dma_tx_state *txstate)
-+{
-+	struct adm_chan *achan = to_adm_chan(chan);
-+	struct virt_dma_desc *vd;
-+	enum dma_status ret;
-+	unsigned long flags;
-+	size_t residue = 0;
-+
-+	ret = dma_cookie_status(chan, cookie, txstate);
-+	if (ret == DMA_COMPLETE || !txstate)
-+		return ret;
-+
-+	spin_lock_irqsave(&achan->vc.lock, flags);
-+
-+	vd = vchan_find_desc(&achan->vc, cookie);
-+	if (vd)
-+		residue = container_of(vd, struct adm_async_desc, vd)->length;
-+
-+	spin_unlock_irqrestore(&achan->vc.lock, flags);
-+
-+	/*
-+	 * residue is either the full length if it is in the issued list, or 0
-+	 * if it is in progress.  We have no reliable way of determining
-+	 * anything inbetween
-+	*/
-+	dma_set_residue(txstate, residue);
-+
-+	if (achan->error)
-+		return DMA_ERROR;
-+
-+	return ret;
-+}
-+
-+/**
-+ * adm_issue_pending - starts pending transactions
-+ * @chan: dma channel
-+ *
-+ * Issues all pending transactions and starts DMA
-+ */
-+static void adm_issue_pending(struct dma_chan *chan)
-+{
-+	struct adm_chan *achan = to_adm_chan(chan);
-+	unsigned long flags;
-+
-+	spin_lock_irqsave(&achan->vc.lock, flags);
-+
-+	if (vchan_issue_pending(&achan->vc) && !achan->curr_txd)
-+		adm_start_dma(achan);
-+	spin_unlock_irqrestore(&achan->vc.lock, flags);
-+}
-+
-+/**
-+ * adm_dma_free_desc - free descriptor memory
-+ * @vd: virtual descriptor
-+ *
-+ */
-+static void adm_dma_free_desc(struct virt_dma_desc *vd)
-+{
-+	struct adm_async_desc *async_desc = container_of(vd,
-+			struct adm_async_desc, vd);
-+
-+	dma_free_writecombine(async_desc->adev->dev, async_desc->dma_len,
-+		async_desc->cpl, async_desc->dma_addr);
-+	kfree(async_desc);
-+}
-+
-+static void adm_channel_init(struct adm_device *adev, struct adm_chan *achan,
-+	u32 index)
-+{
-+	achan->id = index;
-+	achan->adev = adev;
-+
-+	vchan_init(&achan->vc, &adev->common);
-+	achan->vc.desc_free = adm_dma_free_desc;
-+}
-+
-+static int adm_dma_probe(struct platform_device *pdev)
-+{
-+	struct adm_device *adev;
-+	struct resource *iores;
-+	int ret;
-+	u32 i;
-+
-+	adev = devm_kzalloc(&pdev->dev, sizeof(*adev), GFP_KERNEL);
-+	if (!adev)
-+		return -ENOMEM;
-+
-+	adev->dev = &pdev->dev;
-+
-+	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+	adev->regs = devm_ioremap_resource(&pdev->dev, iores);
-+	if (IS_ERR(adev->regs))
-+		return PTR_ERR(adev->regs);
-+
-+	adev->irq = platform_get_irq(pdev, 0);
-+	if (adev->irq < 0)
-+		return adev->irq;
-+
-+	ret = of_property_read_u32(pdev->dev.of_node, "qcom,ee", &adev->ee);
-+	if (ret) {
-+		dev_err(adev->dev, "Execution environment unspecified\n");
-+		return ret;
-+	}
-+
-+	adev->core_clk = devm_clk_get(adev->dev, "core");
-+	if (IS_ERR(adev->core_clk))
-+		return PTR_ERR(adev->core_clk);
-+
-+	ret = clk_prepare_enable(adev->core_clk);
-+	if (ret) {
-+		dev_err(adev->dev, "failed to prepare/enable core clock\n");
-+		return ret;
-+	}
-+
-+	adev->iface_clk = devm_clk_get(adev->dev, "iface");
-+	if (IS_ERR(adev->iface_clk)) {
-+		ret = PTR_ERR(adev->iface_clk);
-+		goto err_disable_core_clk;
-+	}
-+
-+	ret = clk_prepare_enable(adev->iface_clk);
-+	if (ret) {
-+		dev_err(adev->dev, "failed to prepare/enable iface clock\n");
-+		goto err_disable_core_clk;
-+	}
-+
-+	adev->clk_reset = devm_reset_control_get(&pdev->dev, "clk");
-+	if (IS_ERR(adev->clk_reset)) {
-+		dev_err(adev->dev, "failed to get ADM0 reset\n");
-+		ret = PTR_ERR(adev->clk_reset);
-+		goto err_disable_clks;
-+	}
-+
-+	adev->c0_reset = devm_reset_control_get(&pdev->dev, "c0");
-+	if (IS_ERR(adev->c0_reset)) {
-+		dev_err(adev->dev, "failed to get ADM0 C0 reset\n");
-+		ret = PTR_ERR(adev->c0_reset);
-+		goto err_disable_clks;
-+	}
-+
-+	adev->c1_reset = devm_reset_control_get(&pdev->dev, "c1");
-+	if (IS_ERR(adev->c1_reset)) {
-+		dev_err(adev->dev, "failed to get ADM0 C1 reset\n");
-+		ret = PTR_ERR(adev->c1_reset);
-+		goto err_disable_clks;
-+	}
-+
-+	adev->c2_reset = devm_reset_control_get(&pdev->dev, "c2");
-+	if (IS_ERR(adev->c2_reset)) {
-+		dev_err(adev->dev, "failed to get ADM0 C2 reset\n");
-+		ret = PTR_ERR(adev->c2_reset);
-+		goto err_disable_clks;
-+	}
-+
-+	reset_control_assert(adev->clk_reset);
-+	reset_control_assert(adev->c0_reset);
-+	reset_control_assert(adev->c1_reset);
-+	reset_control_assert(adev->c2_reset);
-+
-+	reset_control_deassert(adev->clk_reset);
-+	reset_control_deassert(adev->c0_reset);
-+	reset_control_deassert(adev->c1_reset);
-+	reset_control_deassert(adev->c2_reset);
-+
-+	adev->channels = devm_kcalloc(adev->dev, ADM_MAX_CHANNELS,
-+				sizeof(*adev->channels), GFP_KERNEL);
-+
-+	if (!adev->channels) {
-+		ret = -ENOMEM;
-+		goto err_disable_clks;
-+	}
-+
-+	/* allocate and initialize channels */
-+	INIT_LIST_HEAD(&adev->common.channels);
-+
-+	for (i = 0; i < ADM_MAX_CHANNELS; i++)
-+		adm_channel_init(adev, &adev->channels[i], i);
-+
-+	/* reset CRCIs */
-+	for (i = 0; i < 16; i++)
-+		writel(ADM_CRCI_CTL_RST, adev->regs +
-+			ADM_CRCI_CTL(i, adev->ee));
-+
-+	/* configure client interfaces */
-+	writel(ADM_CI_RANGE_START(0x40) | ADM_CI_RANGE_END(0xb0) |
-+		ADM_CI_BURST_8_WORDS, adev->regs + ADM_CI_CONF(0));
-+	writel(ADM_CI_RANGE_START(0x2a) | ADM_CI_RANGE_END(0x2c) |
-+		ADM_CI_BURST_8_WORDS, adev->regs + ADM_CI_CONF(1));
-+	writel(ADM_CI_RANGE_START(0x12) | ADM_CI_RANGE_END(0x28) |
-+		ADM_CI_BURST_8_WORDS, adev->regs + ADM_CI_CONF(2));
-+	writel(ADM_GP_CTL_LP_EN | ADM_GP_CTL_LP_CNT(0xf),
-+		adev->regs + ADM_GP_CTL);
-+
-+	ret = devm_request_irq(adev->dev, adev->irq, adm_dma_irq,
-+			0, "adm_dma", adev);
-+	if (ret)
-+		goto err_disable_clks;
-+
-+	platform_set_drvdata(pdev, adev);
-+
-+	adev->common.dev = adev->dev;
-+	adev->common.dev->dma_parms = &adev->dma_parms;
-+
-+	/* set capabilities */
-+	dma_cap_zero(adev->common.cap_mask);
-+	dma_cap_set(DMA_SLAVE, adev->common.cap_mask);
-+	dma_cap_set(DMA_PRIVATE, adev->common.cap_mask);
-+
-+	/* initialize dmaengine apis */
-+	adev->common.directions = BIT(DMA_DEV_TO_MEM | DMA_MEM_TO_DEV);
-+	adev->common.residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR;
-+	adev->common.src_addr_widths = DMA_SLAVE_BUSWIDTH_4_BYTES;
-+	adev->common.dst_addr_widths = DMA_SLAVE_BUSWIDTH_4_BYTES;
-+	adev->common.device_free_chan_resources = adm_free_chan;
-+	adev->common.device_prep_slave_sg = adm_prep_slave_sg;
-+	adev->common.device_issue_pending = adm_issue_pending;
-+	adev->common.device_tx_status = adm_tx_status;
-+	adev->common.device_terminate_all = adm_terminate_all;
-+	adev->common.device_config = adm_slave_config;
-+
-+	ret = dma_async_device_register(&adev->common);
-+	if (ret) {
-+		dev_err(adev->dev, "failed to register dma async device\n");
-+		goto err_disable_clks;
-+	}
-+
-+	ret = of_dma_controller_register(pdev->dev.of_node,
-+					 of_dma_xlate_by_chan_id,
-+					 &adev->common);
-+	if (ret)
-+		goto err_unregister_dma;
-+
-+	return 0;
-+
-+err_unregister_dma:
-+	dma_async_device_unregister(&adev->common);
-+err_disable_clks:
-+	clk_disable_unprepare(adev->iface_clk);
-+err_disable_core_clk:
-+	clk_disable_unprepare(adev->core_clk);
-+
-+	return ret;
-+}
-+
-+static int adm_dma_remove(struct platform_device *pdev)
-+{
-+	struct adm_device *adev = platform_get_drvdata(pdev);
-+	struct adm_chan *achan;
-+	u32 i;
-+
-+	of_dma_controller_free(pdev->dev.of_node);
-+	dma_async_device_unregister(&adev->common);
-+
-+	for (i = 0; i < ADM_MAX_CHANNELS; i++) {
-+		achan = &adev->channels[i];
-+
-+		/* mask IRQs for this channel/EE pair */
-+		writel(0, adev->regs + ADM_CH_RSLT_CONF(achan->id, adev->ee));
-+
-+		adm_terminate_all(&adev->channels[i].vc.chan);
-+	}
-+
-+	devm_free_irq(adev->dev, adev->irq, adev);
-+
-+	clk_disable_unprepare(adev->core_clk);
-+	clk_disable_unprepare(adev->iface_clk);
-+
-+	return 0;
-+}
-+
-+static const struct of_device_id adm_of_match[] = {
-+	{ .compatible = "qcom,adm", },
-+	{}
-+};
-+MODULE_DEVICE_TABLE(of, adm_of_match);
-+
-+static struct platform_driver adm_dma_driver = {
-+	.probe = adm_dma_probe,
-+	.remove = adm_dma_remove,
-+	.driver = {
-+		.name = "adm-dma-engine",
-+		.of_match_table = adm_of_match,
-+	},
-+};
-+
-+module_platform_driver(adm_dma_driver);
-+
-+MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
-+MODULE_DESCRIPTION("QCOM ADM DMA engine driver");
-+MODULE_LICENSE("GPL v2");
---- a/drivers/dma/Makefile
-+++ b/drivers/dma/Makefile
-@@ -65,5 +65,6 @@ obj-$(CONFIG_TI_DMA_CROSSBAR) += ti-dma-
- obj-$(CONFIG_TI_EDMA) += edma.o
- obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
- obj-$(CONFIG_ZX_DMA) += zx296702_dma.o
-+obj-$(CONFIG_QCOM_ADM) += qcom_adm.o
- 
- obj-y += xilinx/