coh901318.c 73.2 KB
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/*
 * driver/dma/coh901318.c
 *
 * Copyright (C) 2007-2009 ST-Ericsson
 * License terms: GNU General Public License (GPL) version 2
 * DMA driver for COH 901 318
 * Author: Per Friden <per.friden@stericsson.com>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h> /* printk() */
#include <linux/fs.h> /* everything... */
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#include <linux/scatterlist.h>
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#include <linux/slab.h> /* kmalloc() */
#include <linux/dmaengine.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/irqreturn.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/debugfs.h>
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#include <linux/platform_data/dma-coh901318.h>
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#include <mach/coh901318.h>

#include "coh901318_lli.h"
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#include "dmaengine.h"
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/* points out all dma slave channels.
 * Syntax is [A1, B1, A2, B2, .... ,-1,-1]
 * Select all channels from A to B, end of list is marked with -1,-1
 */
static int dma_slave_channels[] = {
	U300_DMA_MSL_TX_0, U300_DMA_SPI_RX,
	U300_DMA_UART1_TX, U300_DMA_UART1_RX, -1, -1};

/* points out all dma memcpy channels. */
static int dma_memcpy_channels[] = {
	U300_DMA_GENERAL_PURPOSE_0, U300_DMA_GENERAL_PURPOSE_8, -1, -1};

/** register dma for memory access
 *
 * active  1 means dma intends to access memory
 *         0 means dma wont access memory
 */
static void coh901318_access_memory_state(struct device *dev, bool active)
{
}

#define flags_memcpy_config (COH901318_CX_CFG_CH_DISABLE | \
			COH901318_CX_CFG_RM_MEMORY_TO_MEMORY | \
			COH901318_CX_CFG_LCR_DISABLE | \
			COH901318_CX_CFG_TC_IRQ_ENABLE | \
			COH901318_CX_CFG_BE_IRQ_ENABLE)
#define flags_memcpy_lli_chained (COH901318_CX_CTRL_TC_ENABLE | \
			COH901318_CX_CTRL_BURST_COUNT_32_BYTES | \
			COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS | \
			COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE | \
			COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS | \
			COH901318_CX_CTRL_DST_ADDR_INC_ENABLE | \
			COH901318_CX_CTRL_MASTER_MODE_M1RW | \
			COH901318_CX_CTRL_TCP_DISABLE | \
			COH901318_CX_CTRL_TC_IRQ_DISABLE | \
			COH901318_CX_CTRL_HSP_DISABLE | \
			COH901318_CX_CTRL_HSS_DISABLE | \
			COH901318_CX_CTRL_DDMA_LEGACY | \
			COH901318_CX_CTRL_PRDD_SOURCE)
#define flags_memcpy_lli (COH901318_CX_CTRL_TC_ENABLE | \
			COH901318_CX_CTRL_BURST_COUNT_32_BYTES | \
			COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS | \
			COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE | \
			COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS | \
			COH901318_CX_CTRL_DST_ADDR_INC_ENABLE | \
			COH901318_CX_CTRL_MASTER_MODE_M1RW | \
			COH901318_CX_CTRL_TCP_DISABLE | \
			COH901318_CX_CTRL_TC_IRQ_DISABLE | \
			COH901318_CX_CTRL_HSP_DISABLE | \
			COH901318_CX_CTRL_HSS_DISABLE | \
			COH901318_CX_CTRL_DDMA_LEGACY | \
			COH901318_CX_CTRL_PRDD_SOURCE)
#define flags_memcpy_lli_last (COH901318_CX_CTRL_TC_ENABLE | \
			COH901318_CX_CTRL_BURST_COUNT_32_BYTES | \
			COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS | \
			COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE | \
			COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS | \
			COH901318_CX_CTRL_DST_ADDR_INC_ENABLE | \
			COH901318_CX_CTRL_MASTER_MODE_M1RW | \
			COH901318_CX_CTRL_TCP_DISABLE | \
			COH901318_CX_CTRL_TC_IRQ_ENABLE | \
			COH901318_CX_CTRL_HSP_DISABLE | \
			COH901318_CX_CTRL_HSS_DISABLE | \
			COH901318_CX_CTRL_DDMA_LEGACY | \
			COH901318_CX_CTRL_PRDD_SOURCE)

const struct coh_dma_channel chan_config[U300_DMA_CHANNELS] = {
	{
		.number = U300_DMA_MSL_TX_0,
		.name = "MSL TX 0",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_MSL_TX_1,
		.name = "MSL TX 1",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
	},
	{
		.number = U300_DMA_MSL_TX_2,
		.name = "MSL TX 2",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.desc_nbr_max = 10,
	},
	{
		.number = U300_DMA_MSL_TX_3,
		.name = "MSL TX 3",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
	},
	{
		.number = U300_DMA_MSL_TX_4,
		.name = "MSL TX 4",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1R_M2W |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
	},
	{
		.number = U300_DMA_MSL_TX_5,
		.name = "MSL TX 5",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_MSL_TX_6,
		.name = "MSL TX 6",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_MSL_RX_0,
		.name = "MSL RX 0",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_MSL_RX_1,
		.name = "MSL RX 1",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_MSL_RX_2,
		.name = "MSL RX 2",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_MSL_RX_3,
		.name = "MSL RX 3",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_MSL_RX_4,
		.name = "MSL RX 4",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_MSL_RX_5,
		.name = "MSL RX 5",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_32_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M2R_M1W |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_DEMAND_DMA1 |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_MSL_RX_6,
		.name = "MSL RX 6",
		.priority_high = 0,
	},
	/*
	 * Don't set up device address, burst count or size of src
	 * or dst bus for this peripheral - handled by PrimeCell
	 * DMA extension.
	 */
	{
		.number = U300_DMA_MMCSD_RX_TX,
		.name = "MMCSD RX TX",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,

	},
	{
		.number = U300_DMA_MSPRO_TX,
		.name = "MSPRO TX",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_MSPRO_RX,
		.name = "MSPRO RX",
		.priority_high = 0,
	},
	/*
	 * Don't set up device address, burst count or size of src
	 * or dst bus for this peripheral - handled by PrimeCell
	 * DMA extension.
	 */
	{
		.number = U300_DMA_UART0_TX,
		.name = "UART0 TX",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
	},
	{
		.number = U300_DMA_UART0_RX,
		.name = "UART0 RX",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
	},
	{
		.number = U300_DMA_APEX_TX,
		.name = "APEX TX",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_APEX_RX,
		.name = "APEX RX",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_PCM_I2S0_TX,
		.name = "PCM I2S0 TX",
		.priority_high = 1,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
	},
	{
		.number = U300_DMA_PCM_I2S0_RX,
		.name = "PCM I2S0 RX",
		.priority_high = 1,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_PCM_I2S1_TX,
		.name = "PCM I2S1 TX",
		.priority_high = 1,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_SOURCE,
	},
	{
		.number = U300_DMA_PCM_I2S1_RX,
		.name = "PCM I2S1 RX",
		.priority_high = 1,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_DEST,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_BURST_COUNT_16_BYTES |
				COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE |
				COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS |
				COH901318_CX_CTRL_DST_ADDR_INC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_ENABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY |
				COH901318_CX_CTRL_PRDD_DEST,
	},
	{
		.number = U300_DMA_XGAM_CDI,
		.name = "XGAM CDI",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_XGAM_PDI,
		.name = "XGAM PDI",
		.priority_high = 0,
	},
	/*
	 * Don't set up device address, burst count or size of src
	 * or dst bus for this peripheral - handled by PrimeCell
	 * DMA extension.
	 */
	{
		.number = U300_DMA_SPI_TX,
		.name = "SPI TX",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
	},
	{
		.number = U300_DMA_SPI_RX,
		.name = "SPI RX",
		.priority_high = 0,
		.param.config = COH901318_CX_CFG_CH_DISABLE |
				COH901318_CX_CFG_LCR_DISABLE |
				COH901318_CX_CFG_TC_IRQ_ENABLE |
				COH901318_CX_CFG_BE_IRQ_ENABLE,
		.param.ctrl_lli_chained = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_DISABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,
		.param.ctrl_lli_last = 0 |
				COH901318_CX_CTRL_TC_ENABLE |
				COH901318_CX_CTRL_MASTER_MODE_M1RW |
				COH901318_CX_CTRL_TCP_DISABLE |
				COH901318_CX_CTRL_TC_IRQ_ENABLE |
				COH901318_CX_CTRL_HSP_ENABLE |
				COH901318_CX_CTRL_HSS_DISABLE |
				COH901318_CX_CTRL_DDMA_LEGACY,

	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_0,
		.name = "GENERAL 00",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_1,
		.name = "GENERAL 01",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_2,
		.name = "GENERAL 02",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_3,
		.name = "GENERAL 03",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_4,
		.name = "GENERAL 04",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_5,
		.name = "GENERAL 05",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_6,
		.name = "GENERAL 06",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_7,
		.name = "GENERAL 07",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_GENERAL_PURPOSE_8,
		.name = "GENERAL 08",
		.priority_high = 0,

		.param.config = flags_memcpy_config,
		.param.ctrl_lli_chained = flags_memcpy_lli_chained,
		.param.ctrl_lli = flags_memcpy_lli,
		.param.ctrl_lli_last = flags_memcpy_lli_last,
	},
	{
		.number = U300_DMA_UART1_TX,
		.name = "UART1 TX",
		.priority_high = 0,
	},
	{
		.number = U300_DMA_UART1_RX,
		.name = "UART1 RX",
		.priority_high = 0,
	}
};

static struct coh901318_platform coh901318_platform = {
	.chans_slave = dma_slave_channels,
	.chans_memcpy = dma_memcpy_channels,
	.access_memory_state = coh901318_access_memory_state,
	.chan_conf = chan_config,
	.max_channels = U300_DMA_CHANNELS,
};

1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
#define COHC_2_DEV(cohc) (&cohc->chan.dev->device)

#ifdef VERBOSE_DEBUG
#define COH_DBG(x) ({ if (1) x; 0; })
#else
#define COH_DBG(x) ({ if (0) x; 0; })
#endif

struct coh901318_desc {
	struct dma_async_tx_descriptor desc;
	struct list_head node;
	struct scatterlist *sg;
	unsigned int sg_len;
1108
	struct coh901318_lli *lli;
1109
	enum dma_transfer_direction dir;
1110
	unsigned long flags;
1111 1112
	u32 head_config;
	u32 head_ctrl;
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
};

struct coh901318_base {
	struct device *dev;
	void __iomem *virtbase;
	struct coh901318_pool pool;
	struct powersave pm;
	struct dma_device dma_slave;
	struct dma_device dma_memcpy;
	struct coh901318_chan *chans;
	struct coh901318_platform *platform;
};

struct coh901318_chan {
	spinlock_t lock;
	int allocated;
	int id;
	int stopped;

	struct work_struct free_work;
	struct dma_chan chan;

	struct tasklet_struct tasklet;

	struct list_head active;
	struct list_head queue;
	struct list_head free;

	unsigned long nbr_active_done;
	unsigned long busy;

1144 1145 1146
	u32 runtime_addr;
	u32 runtime_ctrl;

1147 1148 1149 1150 1151 1152
	struct coh901318_base *base;
};

static void coh901318_list_print(struct coh901318_chan *cohc,
				 struct coh901318_lli *lli)
{
1153
	struct coh901318_lli *l = lli;
1154 1155
	int i = 0;

1156
	while (l) {
1157
		dev_vdbg(COHC_2_DEV(cohc), "i %d, lli %p, ctrl 0x%x, src 0x%x"
1158
			 ", dst 0x%x, link 0x%x virt_link_addr 0x%p\n",
1159
			 i, l, l->control, l->src_addr, l->dst_addr,
1160
			 l->link_addr, l->virt_link_addr);
1161
		i++;
1162
		l = l->virt_link_addr;
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
	}
}

#ifdef CONFIG_DEBUG_FS

#define COH901318_DEBUGFS_ASSIGN(x, y) (x = y)

static struct coh901318_base *debugfs_dma_base;
static struct dentry *dma_dentry;

static int coh901318_debugfs_read(struct file *file, char __user *buf,
				  size_t count, loff_t *f_pos)
{
	u64 started_channels = debugfs_dma_base->pm.started_channels;
	int pool_count = debugfs_dma_base->pool.debugfs_pool_counter;
	int i;
	int ret = 0;
	char *dev_buf;
	char *tmp;
	int dev_size;

	dev_buf = kmalloc(4*1024, GFP_KERNEL);
	if (dev_buf == NULL)
		goto err_kmalloc;
	tmp = dev_buf;

1189
	tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219

	for (i = 0; i < debugfs_dma_base->platform->max_channels; i++)
		if (started_channels & (1 << i))
			tmp += sprintf(tmp, "channel %d\n", i);

	tmp += sprintf(tmp, "Pool alloc nbr %d\n", pool_count);
	dev_size = tmp  - dev_buf;

	/* No more to read if offset != 0 */
	if (*f_pos > dev_size)
		goto out;

	if (count > dev_size - *f_pos)
		count = dev_size - *f_pos;

	if (copy_to_user(buf, dev_buf + *f_pos, count))
		ret = -EINVAL;
	ret = count;
	*f_pos += count;

 out:
	kfree(dev_buf);
	return ret;

 err_kmalloc:
	return 0;
}

static const struct file_operations coh901318_debugfs_status_operations = {
	.owner		= THIS_MODULE,
1220
	.open		= simple_open,
1221
	.read		= coh901318_debugfs_read,
1222
	.llseek		= default_llseek,
1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
};


static int __init init_coh901318_debugfs(void)
{

	dma_dentry = debugfs_create_dir("dma", NULL);

	(void) debugfs_create_file("status",
				   S_IFREG | S_IRUGO,
				   dma_dentry, NULL,
				   &coh901318_debugfs_status_operations);
	return 0;
}

static void __exit exit_coh901318_debugfs(void)
{
	debugfs_remove_recursive(dma_dentry);
}

module_init(init_coh901318_debugfs);
module_exit(exit_coh901318_debugfs);
#else

#define COH901318_DEBUGFS_ASSIGN(x, y)

#endif /* CONFIG_DEBUG_FS */

static inline struct coh901318_chan *to_coh901318_chan(struct dma_chan *chan)
{
	return container_of(chan, struct coh901318_chan, chan);
}

static inline dma_addr_t
cohc_dev_addr(struct coh901318_chan *cohc)
{
1259 1260 1261
	/* Runtime supplied address will take precedence */
	if (cohc->runtime_addr)
		return cohc->runtime_addr;
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354
	return cohc->base->platform->chan_conf[cohc->id].dev_addr;
}

static inline const struct coh901318_params *
cohc_chan_param(struct coh901318_chan *cohc)
{
	return &cohc->base->platform->chan_conf[cohc->id].param;
}

static inline const struct coh_dma_channel *
cohc_chan_conf(struct coh901318_chan *cohc)
{
	return &cohc->base->platform->chan_conf[cohc->id];
}

static void enable_powersave(struct coh901318_chan *cohc)
{
	unsigned long flags;
	struct powersave *pm = &cohc->base->pm;

	spin_lock_irqsave(&pm->lock, flags);

	pm->started_channels &= ~(1ULL << cohc->id);

	if (!pm->started_channels) {
		/* DMA no longer intends to access memory */
		cohc->base->platform->access_memory_state(cohc->base->dev,
							  false);
	}

	spin_unlock_irqrestore(&pm->lock, flags);
}
static void disable_powersave(struct coh901318_chan *cohc)
{
	unsigned long flags;
	struct powersave *pm = &cohc->base->pm;

	spin_lock_irqsave(&pm->lock, flags);

	if (!pm->started_channels) {
		/* DMA intends to access memory */
		cohc->base->platform->access_memory_state(cohc->base->dev,
							  true);
	}

	pm->started_channels |= (1ULL << cohc->id);

	spin_unlock_irqrestore(&pm->lock, flags);
}

static inline int coh901318_set_ctrl(struct coh901318_chan *cohc, u32 control)
{
	int channel = cohc->id;
	void __iomem *virtbase = cohc->base->virtbase;

	writel(control,
	       virtbase + COH901318_CX_CTRL +
	       COH901318_CX_CTRL_SPACING * channel);
	return 0;
}

static inline int coh901318_set_conf(struct coh901318_chan *cohc, u32 conf)
{
	int channel = cohc->id;
	void __iomem *virtbase = cohc->base->virtbase;

	writel(conf,
	       virtbase + COH901318_CX_CFG +
	       COH901318_CX_CFG_SPACING*channel);
	return 0;
}


static int coh901318_start(struct coh901318_chan *cohc)
{
	u32 val;
	int channel = cohc->id;
	void __iomem *virtbase = cohc->base->virtbase;

	disable_powersave(cohc);

	val = readl(virtbase + COH901318_CX_CFG +
		    COH901318_CX_CFG_SPACING * channel);

	/* Enable channel */
	val |= COH901318_CX_CFG_CH_ENABLE;
	writel(val, virtbase + COH901318_CX_CFG +
	       COH901318_CX_CFG_SPACING * channel);

	return 0;
}

static int coh901318_prep_linked_list(struct coh901318_chan *cohc,
1355
				      struct coh901318_lli *lli)
1356 1357 1358 1359 1360 1361 1362 1363
{
	int channel = cohc->id;
	void __iomem *virtbase = cohc->base->virtbase;

	BUG_ON(readl(virtbase + COH901318_CX_STAT +
		     COH901318_CX_STAT_SPACING*channel) &
	       COH901318_CX_STAT_ACTIVE);

1364
	writel(lli->src_addr,
1365 1366 1367
	       virtbase + COH901318_CX_SRC_ADDR +
	       COH901318_CX_SRC_ADDR_SPACING * channel);

1368
	writel(lli->dst_addr, virtbase +
1369 1370 1371
	       COH901318_CX_DST_ADDR +
	       COH901318_CX_DST_ADDR_SPACING * channel);

1372
	writel(lli->link_addr, virtbase + COH901318_CX_LNK_ADDR +
1373 1374
	       COH901318_CX_LNK_ADDR_SPACING * channel);

1375
	writel(lli->control, virtbase + COH901318_CX_CTRL +
1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390
	       COH901318_CX_CTRL_SPACING * channel);

	return 0;
}

static struct coh901318_desc *
coh901318_desc_get(struct coh901318_chan *cohc)
{
	struct coh901318_desc *desc;

	if (list_empty(&cohc->free)) {
		/* alloc new desc because we're out of used ones
		 * TODO: alloc a pile of descs instead of just one,
		 * avoid many small allocations.
		 */
1391
		desc = kzalloc(sizeof(struct coh901318_desc), GFP_NOWAIT);
1392 1393 1394
		if (desc == NULL)
			goto out;
		INIT_LIST_HEAD(&desc->node);
1395
		dma_async_tx_descriptor_init(&desc->desc, &cohc->chan);
1396 1397 1398 1399 1400 1401
	} else {
		/* Reuse an old desc. */
		desc = list_first_entry(&cohc->free,
					struct coh901318_desc,
					node);
		list_del(&desc->node);
1402 1403 1404 1405 1406
		/* Initialize it a bit so it's not insane */
		desc->sg = NULL;
		desc->sg_len = 0;
		desc->desc.callback = NULL;
		desc->desc.callback_param = NULL;
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
	}

 out:
	return desc;
}

static void
coh901318_desc_free(struct coh901318_chan *cohc, struct coh901318_desc *cohd)
{
	list_add_tail(&cohd->node, &cohc->free);
}

/* call with irq lock held */
static void
coh901318_desc_submit(struct coh901318_chan *cohc, struct coh901318_desc *desc)
{
	list_add_tail(&desc->node, &cohc->active);
}

static struct coh901318_desc *
coh901318_first_active_get(struct coh901318_chan *cohc)
{
	struct coh901318_desc *d;

	if (list_empty(&cohc->active))
		return NULL;

	d = list_first_entry(&cohc->active,
			     struct coh901318_desc,
			     node);
	return d;
}

static void
coh901318_desc_remove(struct coh901318_desc *cohd)
{
	list_del(&cohd->node);
}

static void
coh901318_desc_queue(struct coh901318_chan *cohc, struct coh901318_desc *desc)
{
	list_add_tail(&desc->node, &cohc->queue);
}

static struct coh901318_desc *
coh901318_first_queued(struct coh901318_chan *cohc)
{
	struct coh901318_desc *d;

	if (list_empty(&cohc->queue))
		return NULL;

	d = list_first_entry(&cohc->queue,
			     struct coh901318_desc,
			     node);
	return d;
}

1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477
static inline u32 coh901318_get_bytes_in_lli(struct coh901318_lli *in_lli)
{
	struct coh901318_lli *lli = in_lli;
	u32 bytes = 0;

	while (lli) {
		bytes += lli->control & COH901318_CX_CTRL_TC_VALUE_MASK;
		lli = lli->virt_link_addr;
	}
	return bytes;
}

1478
/*
1479 1480 1481 1482
 * Get the number of bytes left to transfer on this channel,
 * it is unwise to call this before stopping the channel for
 * absolute measures, but for a rough guess you can still call
 * it.
1483
 */
1484
static u32 coh901318_get_bytes_left(struct dma_chan *chan)
1485 1486
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
1487 1488 1489 1490 1491
	struct coh901318_desc *cohd;
	struct list_head *pos;
	unsigned long flags;
	u32 left = 0;
	int i = 0;
1492 1493 1494

	spin_lock_irqsave(&cohc->lock, flags);

1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555
	/*
	 * If there are many queued jobs, we iterate and add the
	 * size of them all. We take a special look on the first
	 * job though, since it is probably active.
	 */
	list_for_each(pos, &cohc->active) {
		/*
		 * The first job in the list will be working on the
		 * hardware. The job can be stopped but still active,
		 * so that the transfer counter is somewhere inside
		 * the buffer.
		 */
		cohd = list_entry(pos, struct coh901318_desc, node);

		if (i == 0) {
			struct coh901318_lli *lli;
			dma_addr_t ladd;

			/* Read current transfer count value */
			left = readl(cohc->base->virtbase +
				     COH901318_CX_CTRL +
				     COH901318_CX_CTRL_SPACING * cohc->id) &
				COH901318_CX_CTRL_TC_VALUE_MASK;

			/* See if the transfer is linked... */
			ladd = readl(cohc->base->virtbase +
				     COH901318_CX_LNK_ADDR +
				     COH901318_CX_LNK_ADDR_SPACING *
				     cohc->id) &
				~COH901318_CX_LNK_LINK_IMMEDIATE;
			/* Single transaction */
			if (!ladd)
				continue;

			/*
			 * Linked transaction, follow the lli, find the
			 * currently processing lli, and proceed to the next
			 */
			lli = cohd->lli;
			while (lli && lli->link_addr != ladd)
				lli = lli->virt_link_addr;

			if (lli)
				lli = lli->virt_link_addr;

			/*
			 * Follow remaining lli links around to count the total
			 * number of bytes left
			 */
			left += coh901318_get_bytes_in_lli(lli);
		} else {
			left += coh901318_get_bytes_in_lli(cohd->lli);
		}
		i++;
	}

	/* Also count bytes in the queued jobs */
	list_for_each(pos, &cohc->queue) {
		cohd = list_entry(pos, struct coh901318_desc, node);
		left += coh901318_get_bytes_in_lli(cohd->lli);
	}
1556 1557 1558

	spin_unlock_irqrestore(&cohc->lock, flags);

1559
	return left;
1560 1561
}

1562 1563 1564 1565 1566
/*
 * Pauses a transfer without losing data. Enables power save.
 * Use this function in conjunction with coh901318_resume.
 */
static void coh901318_pause(struct dma_chan *chan)
1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579
{
	u32 val;
	unsigned long flags;
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	int channel = cohc->id;
	void __iomem *virtbase = cohc->base->virtbase;

	spin_lock_irqsave(&cohc->lock, flags);

	/* Disable channel in HW */
	val = readl(virtbase + COH901318_CX_CFG +
		    COH901318_CX_CFG_SPACING * channel);

L
Lucas De Marchi 已提交
1580
	/* Stopping infinite transfer */
1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
	if ((val & COH901318_CX_CTRL_TC_ENABLE) == 0 &&
	    (val & COH901318_CX_CFG_CH_ENABLE))
		cohc->stopped = 1;


	val &= ~COH901318_CX_CFG_CH_ENABLE;
	/* Enable twice, HW bug work around */
	writel(val, virtbase + COH901318_CX_CFG +
	       COH901318_CX_CFG_SPACING * channel);
	writel(val, virtbase + COH901318_CX_CFG +
	       COH901318_CX_CFG_SPACING * channel);

	/* Spin-wait for it to actually go inactive */
	while (readl(virtbase + COH901318_CX_STAT+COH901318_CX_STAT_SPACING *
		     channel) & COH901318_CX_STAT_ACTIVE)
		cpu_relax();

	/* Check if we stopped an active job */
	if ((readl(virtbase + COH901318_CX_CTRL+COH901318_CX_CTRL_SPACING *
		   channel) & COH901318_CX_CTRL_TC_VALUE_MASK) > 0)
		cohc->stopped = 1;

	enable_powersave(cohc);

	spin_unlock_irqrestore(&cohc->lock, flags);
}

1608
/* Resumes a transfer that has been stopped via 300_dma_stop(..).
1609 1610
   Power save is handled.
*/
1611
static void coh901318_resume(struct dma_chan *chan)
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694
{
	u32 val;
	unsigned long flags;
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	int channel = cohc->id;

	spin_lock_irqsave(&cohc->lock, flags);

	disable_powersave(cohc);

	if (cohc->stopped) {
		/* Enable channel in HW */
		val = readl(cohc->base->virtbase + COH901318_CX_CFG +
			    COH901318_CX_CFG_SPACING * channel);

		val |= COH901318_CX_CFG_CH_ENABLE;

		writel(val, cohc->base->virtbase + COH901318_CX_CFG +
		       COH901318_CX_CFG_SPACING*channel);

		cohc->stopped = 0;
	}

	spin_unlock_irqrestore(&cohc->lock, flags);
}

bool coh901318_filter_id(struct dma_chan *chan, void *chan_id)
{
	unsigned int ch_nr = (unsigned int) chan_id;

	if (ch_nr == to_coh901318_chan(chan)->id)
		return true;

	return false;
}
EXPORT_SYMBOL(coh901318_filter_id);

/*
 * DMA channel allocation
 */
static int coh901318_config(struct coh901318_chan *cohc,
			    struct coh901318_params *param)
{
	unsigned long flags;
	const struct coh901318_params *p;
	int channel = cohc->id;
	void __iomem *virtbase = cohc->base->virtbase;

	spin_lock_irqsave(&cohc->lock, flags);

	if (param)
		p = param;
	else
		p = &cohc->base->platform->chan_conf[channel].param;

	/* Clear any pending BE or TC interrupt */
	if (channel < 32) {
		writel(1 << channel, virtbase + COH901318_BE_INT_CLEAR1);
		writel(1 << channel, virtbase + COH901318_TC_INT_CLEAR1);
	} else {
		writel(1 << (channel - 32), virtbase +
		       COH901318_BE_INT_CLEAR2);
		writel(1 << (channel - 32), virtbase +
		       COH901318_TC_INT_CLEAR2);
	}

	coh901318_set_conf(cohc, p->config);
	coh901318_set_ctrl(cohc, p->ctrl_lli_last);

	spin_unlock_irqrestore(&cohc->lock, flags);

	return 0;
}

/* must lock when calling this function
 * start queued jobs, if any
 * TODO: start all queued jobs in one go
 *
 * Returns descriptor if queued job is started otherwise NULL.
 * If the queue is empty NULL is returned.
 */
static struct coh901318_desc *coh901318_queue_start(struct coh901318_chan *cohc)
{
1695
	struct coh901318_desc *cohd;
1696

1697 1698
	/*
	 * start queued jobs, if any
1699 1700
	 * TODO: transmit all queued jobs in one go
	 */
1701
	cohd = coh901318_first_queued(cohc);
1702

1703
	if (cohd != NULL) {
1704
		/* Remove from queue */
1705
		coh901318_desc_remove(cohd);
1706 1707 1708
		/* initiate DMA job */
		cohc->busy = 1;

1709
		coh901318_desc_submit(cohc, cohd);
1710

1711 1712 1713
		/* Program the transaction head */
		coh901318_set_conf(cohc, cohd->head_config);
		coh901318_set_ctrl(cohc, cohd->head_ctrl);
1714
		coh901318_prep_linked_list(cohc, cohd->lli);
1715

1716
		/* start dma job on this channel */
1717 1718 1719 1720
		coh901318_start(cohc);

	}

1721
	return cohd;
1722 1723
}

1724 1725 1726 1727
/*
 * This tasklet is called from the interrupt handler to
 * handle each descriptor (DMA job) that is sent to a channel.
 */
1728 1729 1730 1731 1732 1733 1734 1735
static void dma_tasklet(unsigned long data)
{
	struct coh901318_chan *cohc = (struct coh901318_chan *) data;
	struct coh901318_desc *cohd_fin;
	unsigned long flags;
	dma_async_tx_callback callback;
	void *callback_param;

1736 1737 1738 1739
	dev_vdbg(COHC_2_DEV(cohc), "[%s] chan_id %d"
		 " nbr_active_done %ld\n", __func__,
		 cohc->id, cohc->nbr_active_done);

1740 1741
	spin_lock_irqsave(&cohc->lock, flags);

1742
	/* get first active descriptor entry from list */
1743 1744 1745 1746 1747
	cohd_fin = coh901318_first_active_get(cohc);

	if (cohd_fin == NULL)
		goto err;

1748 1749 1750
	/* locate callback to client */
	callback = cohd_fin->desc.callback;
	callback_param = cohd_fin->desc.callback_param;
1751

1752
	/* sign this job as completed on the channel */
1753
	dma_cookie_complete(&cohd_fin->desc);
1754

1755
	/* release the lli allocation and remove the descriptor */
1756
	coh901318_lli_free(&cohc->base->pool, &cohd_fin->lli);
1757

1758 1759 1760
	/* return desc to free-list */
	coh901318_desc_remove(cohd_fin);
	coh901318_desc_free(cohc, cohd_fin);
1761

1762
	spin_unlock_irqrestore(&cohc->lock, flags);
1763

1764 1765 1766
	/* Call the callback when we're done */
	if (callback)
		callback(callback_param);
1767

1768
	spin_lock_irqsave(&cohc->lock, flags);
1769

1770 1771 1772 1773 1774 1775 1776
	/*
	 * If another interrupt fired while the tasklet was scheduling,
	 * we don't get called twice, so we have this number of active
	 * counter that keep track of the number of IRQs expected to
	 * be handled for this channel. If there happen to be more than
	 * one IRQ to be ack:ed, we simply schedule this tasklet again.
	 */
1777
	cohc->nbr_active_done--;
1778
	if (cohc->nbr_active_done) {
1779 1780
		dev_dbg(COHC_2_DEV(cohc), "scheduling tasklet again, new IRQs "
			"came in while we were scheduling this tasklet\n");
1781 1782 1783 1784 1785 1786
		if (cohc_chan_conf(cohc)->priority_high)
			tasklet_hi_schedule(&cohc->tasklet);
		else
			tasklet_schedule(&cohc->tasklet);
	}

1787
	spin_unlock_irqrestore(&cohc->lock, flags);
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799

	return;

 err:
	spin_unlock_irqrestore(&cohc->lock, flags);
	dev_err(COHC_2_DEV(cohc), "[%s] No active dma desc\n", __func__);
}


/* called from interrupt context */
static void dma_tc_handle(struct coh901318_chan *cohc)
{
1800 1801 1802 1803 1804 1805 1806
	/*
	 * If the channel is not allocated, then we shouldn't have
	 * any TC interrupts on it.
	 */
	if (!cohc->allocated) {
		dev_err(COHC_2_DEV(cohc), "spurious interrupt from "
			"unallocated channel\n");
1807
		return;
1808
	}
1809

1810
	spin_lock(&cohc->lock);
1811

1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822
	/*
	 * When we reach this point, at least one queue item
	 * should have been moved over from cohc->queue to
	 * cohc->active and run to completion, that is why we're
	 * getting a terminal count interrupt is it not?
	 * If you get this BUG() the most probable cause is that
	 * the individual nodes in the lli chain have IRQ enabled,
	 * so check your platform config for lli chain ctrl.
	 */
	BUG_ON(list_empty(&cohc->active));

1823 1824
	cohc->nbr_active_done++;

1825 1826 1827 1828
	/*
	 * This attempt to take a job from cohc->queue, put it
	 * into cohc->active and start it.
	 */
1829
	if (coh901318_queue_start(cohc) == NULL)
1830 1831
		cohc->busy = 0;

1832 1833
	spin_unlock(&cohc->lock);

1834 1835 1836 1837
	/*
	 * This tasklet will remove items from cohc->active
	 * and thus terminates them.
	 */
1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902
	if (cohc_chan_conf(cohc)->priority_high)
		tasklet_hi_schedule(&cohc->tasklet);
	else
		tasklet_schedule(&cohc->tasklet);
}


static irqreturn_t dma_irq_handler(int irq, void *dev_id)
{
	u32 status1;
	u32 status2;
	int i;
	int ch;
	struct coh901318_base *base  = dev_id;
	struct coh901318_chan *cohc;
	void __iomem *virtbase = base->virtbase;

	status1 = readl(virtbase + COH901318_INT_STATUS1);
	status2 = readl(virtbase + COH901318_INT_STATUS2);

	if (unlikely(status1 == 0 && status2 == 0)) {
		dev_warn(base->dev, "spurious DMA IRQ from no channel!\n");
		return IRQ_HANDLED;
	}

	/* TODO: consider handle IRQ in tasklet here to
	 *       minimize interrupt latency */

	/* Check the first 32 DMA channels for IRQ */
	while (status1) {
		/* Find first bit set, return as a number. */
		i = ffs(status1) - 1;
		ch = i;

		cohc = &base->chans[ch];
		spin_lock(&cohc->lock);

		/* Mask off this bit */
		status1 &= ~(1 << i);
		/* Check the individual channel bits */
		if (test_bit(i, virtbase + COH901318_BE_INT_STATUS1)) {
			dev_crit(COHC_2_DEV(cohc),
				 "DMA bus error on channel %d!\n", ch);
			BUG_ON(1);
			/* Clear BE interrupt */
			__set_bit(i, virtbase + COH901318_BE_INT_CLEAR1);
		} else {
			/* Caused by TC, really? */
			if (unlikely(!test_bit(i, virtbase +
					       COH901318_TC_INT_STATUS1))) {
				dev_warn(COHC_2_DEV(cohc),
					 "ignoring interrupt not caused by terminal count on channel %d\n", ch);
				/* Clear TC interrupt */
				BUG_ON(1);
				__set_bit(i, virtbase + COH901318_TC_INT_CLEAR1);
			} else {
				/* Enable powersave if transfer has finished */
				if (!(readl(virtbase + COH901318_CX_STAT +
					    COH901318_CX_STAT_SPACING*ch) &
				      COH901318_CX_STAT_ENABLED)) {
					enable_powersave(cohc);
				}

				/* Must clear TC interrupt before calling
				 * dma_tc_handle
1903
				 * in case tc_handle initiate a new dma job
1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947
				 */
				__set_bit(i, virtbase + COH901318_TC_INT_CLEAR1);

				dma_tc_handle(cohc);
			}
		}
		spin_unlock(&cohc->lock);
	}

	/* Check the remaining 32 DMA channels for IRQ */
	while (status2) {
		/* Find first bit set, return as a number. */
		i = ffs(status2) - 1;
		ch = i + 32;
		cohc = &base->chans[ch];
		spin_lock(&cohc->lock);

		/* Mask off this bit */
		status2 &= ~(1 << i);
		/* Check the individual channel bits */
		if (test_bit(i, virtbase + COH901318_BE_INT_STATUS2)) {
			dev_crit(COHC_2_DEV(cohc),
				 "DMA bus error on channel %d!\n", ch);
			/* Clear BE interrupt */
			BUG_ON(1);
			__set_bit(i, virtbase + COH901318_BE_INT_CLEAR2);
		} else {
			/* Caused by TC, really? */
			if (unlikely(!test_bit(i, virtbase +
					       COH901318_TC_INT_STATUS2))) {
				dev_warn(COHC_2_DEV(cohc),
					 "ignoring interrupt not caused by terminal count on channel %d\n", ch);
				/* Clear TC interrupt */
				__set_bit(i, virtbase + COH901318_TC_INT_CLEAR2);
				BUG_ON(1);
			} else {
				/* Enable powersave if transfer has finished */
				if (!(readl(virtbase + COH901318_CX_STAT +
					    COH901318_CX_STAT_SPACING*ch) &
				      COH901318_CX_STAT_ENABLED)) {
					enable_powersave(cohc);
				}
				/* Must clear TC interrupt before calling
				 * dma_tc_handle
1948
				 * in case tc_handle initiate a new dma job
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
				 */
				__set_bit(i, virtbase + COH901318_TC_INT_CLEAR2);

				dma_tc_handle(cohc);
			}
		}
		spin_unlock(&cohc->lock);
	}

	return IRQ_HANDLED;
}

static int coh901318_alloc_chan_resources(struct dma_chan *chan)
{
	struct coh901318_chan	*cohc = to_coh901318_chan(chan);
1964
	unsigned long flags;
1965 1966 1967 1968 1969 1970 1971

	dev_vdbg(COHC_2_DEV(cohc), "[%s] DMA channel %d\n",
		 __func__, cohc->id);

	if (chan->client_count > 1)
		return -EBUSY;

1972 1973
	spin_lock_irqsave(&cohc->lock, flags);

1974 1975 1976
	coh901318_config(cohc, NULL);

	cohc->allocated = 1;
1977
	dma_cookie_init(chan);
1978

1979 1980
	spin_unlock_irqrestore(&cohc->lock, flags);

1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002
	return 1;
}

static void
coh901318_free_chan_resources(struct dma_chan *chan)
{
	struct coh901318_chan	*cohc = to_coh901318_chan(chan);
	int channel = cohc->id;
	unsigned long flags;

	spin_lock_irqsave(&cohc->lock, flags);

	/* Disable HW */
	writel(0x00000000U, cohc->base->virtbase + COH901318_CX_CFG +
	       COH901318_CX_CFG_SPACING*channel);
	writel(0x00000000U, cohc->base->virtbase + COH901318_CX_CTRL +
	       COH901318_CX_CTRL_SPACING*channel);

	cohc->allocated = 0;

	spin_unlock_irqrestore(&cohc->lock, flags);

2003
	chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
}


static dma_cookie_t
coh901318_tx_submit(struct dma_async_tx_descriptor *tx)
{
	struct coh901318_desc *cohd = container_of(tx, struct coh901318_desc,
						   desc);
	struct coh901318_chan *cohc = to_coh901318_chan(tx->chan);
	unsigned long flags;
2014
	dma_cookie_t cookie;
2015 2016

	spin_lock_irqsave(&cohc->lock, flags);
2017
	cookie = dma_cookie_assign(tx);
2018 2019 2020 2021 2022

	coh901318_desc_queue(cohc, cohd);

	spin_unlock_irqrestore(&cohc->lock, flags);

2023
	return cookie;
2024 2025 2026 2027 2028 2029
}

static struct dma_async_tx_descriptor *
coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
		      size_t size, unsigned long flags)
{
2030
	struct coh901318_lli *lli;
2031 2032 2033 2034 2035
	struct coh901318_desc *cohd;
	unsigned long flg;
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	int lli_len;
	u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last;
2036
	int ret;
2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051

	spin_lock_irqsave(&cohc->lock, flg);

	dev_vdbg(COHC_2_DEV(cohc),
		 "[%s] channel %d src 0x%x dest 0x%x size %d\n",
		 __func__, cohc->id, src, dest, size);

	if (flags & DMA_PREP_INTERRUPT)
		/* Trigger interrupt after last lli */
		ctrl_last |= COH901318_CX_CTRL_TC_IRQ_ENABLE;

	lli_len = size >> MAX_DMA_PACKET_SIZE_SHIFT;
	if ((lli_len << MAX_DMA_PACKET_SIZE_SHIFT) < size)
		lli_len++;

2052
	lli = coh901318_lli_alloc(&cohc->base->pool, lli_len);
2053

2054
	if (lli == NULL)
2055 2056
		goto err;

2057
	ret = coh901318_lli_fill_memcpy(
2058
		&cohc->base->pool, lli, src, size, dest,
2059 2060 2061 2062
		cohc_chan_param(cohc)->ctrl_lli_chained,
		ctrl_last);
	if (ret)
		goto err;
2063

2064
	COH_DBG(coh901318_list_print(cohc, lli));
2065

2066 2067
	/* Pick a descriptor to handle this transfer */
	cohd = coh901318_desc_get(cohc);
2068
	cohd->lli = lli;
2069
	cohd->flags = flags;
2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
	cohd->desc.tx_submit = coh901318_tx_submit;

	spin_unlock_irqrestore(&cohc->lock, flg);

	return &cohd->desc;
 err:
	spin_unlock_irqrestore(&cohc->lock, flg);
	return NULL;
}

static struct dma_async_tx_descriptor *
coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
2082
			unsigned int sg_len, enum dma_transfer_direction direction,
2083
			unsigned long flags, void *context)
2084 2085
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
2086
	struct coh901318_lli *lli;
2087
	struct coh901318_desc *cohd;
2088
	const struct coh901318_params *params;
2089 2090 2091 2092 2093 2094 2095
	struct scatterlist *sg;
	int len = 0;
	int size;
	int i;
	u32 ctrl_chained = cohc_chan_param(cohc)->ctrl_lli_chained;
	u32 ctrl = cohc_chan_param(cohc)->ctrl_lli;
	u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last;
2096
	u32 config;
2097
	unsigned long flg;
2098
	int ret;
2099 2100 2101

	if (!sgl)
		goto out;
2102
	if (sg_dma_len(sgl) == 0)
2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113
		goto out;

	spin_lock_irqsave(&cohc->lock, flg);

	dev_vdbg(COHC_2_DEV(cohc), "[%s] sg_len %d dir %d\n",
		 __func__, sg_len, direction);

	if (flags & DMA_PREP_INTERRUPT)
		/* Trigger interrupt after last lli */
		ctrl_last |= COH901318_CX_CTRL_TC_IRQ_ENABLE;

2114 2115
	params = cohc_chan_param(cohc);
	config = params->config;
2116 2117 2118 2119 2120 2121 2122 2123
	/*
	 * Add runtime-specific control on top, make
	 * sure the bits you set per peripheral channel are
	 * cleared in the default config from the platform.
	 */
	ctrl_chained |= cohc->runtime_ctrl;
	ctrl_last |= cohc->runtime_ctrl;
	ctrl |= cohc->runtime_ctrl;
2124

2125
	if (direction == DMA_MEM_TO_DEV) {
2126 2127 2128
		u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE |
			COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE;

2129
		config |= COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY;
2130 2131 2132
		ctrl_chained |= tx_flags;
		ctrl_last |= tx_flags;
		ctrl |= tx_flags;
2133
	} else if (direction == DMA_DEV_TO_MEM) {
2134 2135 2136
		u32 rx_flags = COH901318_CX_CTRL_PRDD_DEST |
			COH901318_CX_CTRL_DST_ADDR_INC_ENABLE;

2137
		config |= COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY;
2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
		ctrl_chained |= rx_flags;
		ctrl_last |= rx_flags;
		ctrl |= rx_flags;
	} else
		goto err_direction;

	/* The dma only supports transmitting packages up to
	 * MAX_DMA_PACKET_SIZE. Calculate to total number of
	 * dma elemts required to send the entire sg list
	 */
	for_each_sg(sgl, sg, sg_len, i) {
		unsigned int factor;
		size = sg_dma_len(sg);

		if (size <= MAX_DMA_PACKET_SIZE) {
			len++;
			continue;
		}

		factor = size >> MAX_DMA_PACKET_SIZE_SHIFT;
		if ((factor << MAX_DMA_PACKET_SIZE_SHIFT) < size)
			factor++;

		len += factor;
	}

2164
	pr_debug("Allocate %d lli:s for this transfer\n", len);
2165
	lli = coh901318_lli_alloc(&cohc->base->pool, len);
2166

2167
	if (lli == NULL)
2168 2169
		goto err_dma_alloc;

2170 2171
	/* initiate allocated lli list */
	ret = coh901318_lli_fill_sg(&cohc->base->pool, lli, sgl, sg_len,
2172 2173 2174 2175 2176 2177 2178
				    cohc_dev_addr(cohc),
				    ctrl_chained,
				    ctrl,
				    ctrl_last,
				    direction, COH901318_CX_CTRL_TC_IRQ_ENABLE);
	if (ret)
		goto err_lli_fill;
2179

2180

2181
	COH_DBG(coh901318_list_print(cohc, lli));
2182

2183 2184
	/* Pick a descriptor to handle this transfer */
	cohd = coh901318_desc_get(cohc);
2185 2186 2187 2188 2189 2190 2191
	cohd->head_config = config;
	/*
	 * Set the default head ctrl for the channel to the one from the
	 * lli, things may have changed due to odd buffer alignment
	 * etc.
	 */
	cohd->head_ctrl = lli->control;
2192 2193 2194
	cohd->dir = direction;
	cohd->flags = flags;
	cohd->desc.tx_submit = coh901318_tx_submit;
2195
	cohd->lli = lli;
2196

2197 2198 2199
	spin_unlock_irqrestore(&cohc->lock, flg);

	return &cohd->desc;
2200
 err_lli_fill:
2201 2202 2203 2204 2205 2206 2207 2208
 err_dma_alloc:
 err_direction:
	spin_unlock_irqrestore(&cohc->lock, flg);
 out:
	return NULL;
}

static enum dma_status
2209 2210
coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
		 struct dma_tx_state *txstate)
2211 2212
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
2213
	enum dma_status ret;
2214

2215 2216 2217
	ret = dma_cookie_status(chan, cookie, txstate);
	/* FIXME: should be conditional on ret != DMA_SUCCESS? */
	dma_set_residue(txstate, coh901318_get_bytes_left(chan));
2218

2219 2220
	if (ret == DMA_IN_PROGRESS && cohc->stopped)
		ret = DMA_PAUSED;
2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232

	return ret;
}

static void
coh901318_issue_pending(struct dma_chan *chan)
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	unsigned long flags;

	spin_lock_irqsave(&cohc->lock, flags);

2233 2234 2235 2236 2237 2238
	/*
	 * Busy means that pending jobs are already being processed,
	 * and then there is no point in starting the queue: the
	 * terminal count interrupt on the channel will take the next
	 * job on the queue and execute it anyway.
	 */
2239 2240 2241 2242 2243 2244
	if (!cohc->busy)
		coh901318_queue_start(cohc);

	spin_unlock_irqrestore(&cohc->lock, flags);
}

2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316
/*
 * Here we wrap in the runtime dma control interface
 */
struct burst_table {
	int burst_8bit;
	int burst_16bit;
	int burst_32bit;
	u32 reg;
};

static const struct burst_table burst_sizes[] = {
	{
		.burst_8bit = 64,
		.burst_16bit = 32,
		.burst_32bit = 16,
		.reg = COH901318_CX_CTRL_BURST_COUNT_64_BYTES,
	},
	{
		.burst_8bit = 48,
		.burst_16bit = 24,
		.burst_32bit = 12,
		.reg = COH901318_CX_CTRL_BURST_COUNT_48_BYTES,
	},
	{
		.burst_8bit = 32,
		.burst_16bit = 16,
		.burst_32bit = 8,
		.reg = COH901318_CX_CTRL_BURST_COUNT_32_BYTES,
	},
	{
		.burst_8bit = 16,
		.burst_16bit = 8,
		.burst_32bit = 4,
		.reg = COH901318_CX_CTRL_BURST_COUNT_16_BYTES,
	},
	{
		.burst_8bit = 8,
		.burst_16bit = 4,
		.burst_32bit = 2,
		.reg = COH901318_CX_CTRL_BURST_COUNT_8_BYTES,
	},
	{
		.burst_8bit = 4,
		.burst_16bit = 2,
		.burst_32bit = 1,
		.reg = COH901318_CX_CTRL_BURST_COUNT_4_BYTES,
	},
	{
		.burst_8bit = 2,
		.burst_16bit = 1,
		.burst_32bit = 0,
		.reg = COH901318_CX_CTRL_BURST_COUNT_2_BYTES,
	},
	{
		.burst_8bit = 1,
		.burst_16bit = 0,
		.burst_32bit = 0,
		.reg = COH901318_CX_CTRL_BURST_COUNT_1_BYTE,
	},
};

static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
			struct dma_slave_config *config)
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	dma_addr_t addr;
	enum dma_slave_buswidth addr_width;
	u32 maxburst;
	u32 runtime_ctrl = 0;
	int i = 0;

	/* We only support mem to per or per to mem transfers */
2317
	if (config->direction == DMA_DEV_TO_MEM) {
2318 2319 2320
		addr = config->src_addr;
		addr_width = config->src_addr_width;
		maxburst = config->src_maxburst;
2321
	} else if (config->direction == DMA_MEM_TO_DEV) {
2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384
		addr = config->dst_addr;
		addr_width = config->dst_addr_width;
		maxburst = config->dst_maxburst;
	} else {
		dev_err(COHC_2_DEV(cohc), "illegal channel mode\n");
		return;
	}

	dev_dbg(COHC_2_DEV(cohc), "configure channel for %d byte transfers\n",
		addr_width);
	switch (addr_width)  {
	case DMA_SLAVE_BUSWIDTH_1_BYTE:
		runtime_ctrl |=
			COH901318_CX_CTRL_SRC_BUS_SIZE_8_BITS |
			COH901318_CX_CTRL_DST_BUS_SIZE_8_BITS;

		while (i < ARRAY_SIZE(burst_sizes)) {
			if (burst_sizes[i].burst_8bit <= maxburst)
				break;
			i++;
		}

		break;
	case DMA_SLAVE_BUSWIDTH_2_BYTES:
		runtime_ctrl |=
			COH901318_CX_CTRL_SRC_BUS_SIZE_16_BITS |
			COH901318_CX_CTRL_DST_BUS_SIZE_16_BITS;

		while (i < ARRAY_SIZE(burst_sizes)) {
			if (burst_sizes[i].burst_16bit <= maxburst)
				break;
			i++;
		}

		break;
	case DMA_SLAVE_BUSWIDTH_4_BYTES:
		/* Direction doesn't matter here, it's 32/32 bits */
		runtime_ctrl |=
			COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
			COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS;

		while (i < ARRAY_SIZE(burst_sizes)) {
			if (burst_sizes[i].burst_32bit <= maxburst)
				break;
			i++;
		}

		break;
	default:
		dev_err(COHC_2_DEV(cohc),
			"bad runtimeconfig: alien address width\n");
		return;
	}

	runtime_ctrl |= burst_sizes[i].reg;
	dev_dbg(COHC_2_DEV(cohc),
		"selected burst size %d bytes for address width %d bytes, maxburst %d\n",
		burst_sizes[i].burst_8bit, addr_width, maxburst);

	cohc->runtime_addr = addr;
	cohc->runtime_ctrl = runtime_ctrl;
}

2385
static int
2386 2387
coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
		  unsigned long arg)
2388 2389 2390 2391 2392 2393
{
	unsigned long flags;
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	struct coh901318_desc *cohd;
	void __iomem *virtbase = cohc->base->virtbase;

2394 2395 2396 2397 2398 2399 2400 2401
	if (cmd == DMA_SLAVE_CONFIG) {
		struct dma_slave_config *config =
			(struct dma_slave_config *) arg;

		coh901318_dma_set_runtimeconfig(chan, config);
		return 0;
	  }

2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413
	if (cmd == DMA_PAUSE) {
		coh901318_pause(chan);
		return 0;
	}

	if (cmd == DMA_RESUME) {
		coh901318_resume(chan);
		return 0;
	}

	if (cmd != DMA_TERMINATE_ALL)
		return -ENXIO;
2414

2415 2416
	/* The remainder of this function terminates the transfer */
	coh901318_pause(chan);
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433
	spin_lock_irqsave(&cohc->lock, flags);

	/* Clear any pending BE or TC interrupt */
	if (cohc->id < 32) {
		writel(1 << cohc->id, virtbase + COH901318_BE_INT_CLEAR1);
		writel(1 << cohc->id, virtbase + COH901318_TC_INT_CLEAR1);
	} else {
		writel(1 << (cohc->id - 32), virtbase +
		       COH901318_BE_INT_CLEAR2);
		writel(1 << (cohc->id - 32), virtbase +
		       COH901318_TC_INT_CLEAR2);
	}

	enable_powersave(cohc);

	while ((cohd = coh901318_first_active_get(cohc))) {
		/* release the lli allocation*/
2434
		coh901318_lli_free(&cohc->base->pool, &cohd->lli);
2435 2436

		/* return desc to free-list */
2437
		coh901318_desc_remove(cohd);
2438 2439 2440 2441 2442
		coh901318_desc_free(cohc, cohd);
	}

	while ((cohd = coh901318_first_queued(cohc))) {
		/* release the lli allocation*/
2443
		coh901318_lli_free(&cohc->base->pool, &cohd->lli);
2444 2445

		/* return desc to free-list */
2446
		coh901318_desc_remove(cohd);
2447 2448 2449 2450 2451 2452 2453 2454
		coh901318_desc_free(cohc, cohd);
	}


	cohc->nbr_active_done = 0;
	cohc->busy = 0;

	spin_unlock_irqrestore(&cohc->lock, flags);
2455 2456

	return 0;
2457
}
2458

2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506
void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
			 struct coh901318_base *base)
{
	int chans_i;
	int i = 0;
	struct coh901318_chan *cohc;

	INIT_LIST_HEAD(&dma->channels);

	for (chans_i = 0; pick_chans[chans_i] != -1; chans_i += 2) {
		for (i = pick_chans[chans_i]; i <= pick_chans[chans_i+1]; i++) {
			cohc = &base->chans[i];

			cohc->base = base;
			cohc->chan.device = dma;
			cohc->id = i;

			/* TODO: do we really need this lock if only one
			 * client is connected to each channel?
			 */

			spin_lock_init(&cohc->lock);

			cohc->nbr_active_done = 0;
			cohc->busy = 0;
			INIT_LIST_HEAD(&cohc->free);
			INIT_LIST_HEAD(&cohc->active);
			INIT_LIST_HEAD(&cohc->queue);

			tasklet_init(&cohc->tasklet, dma_tasklet,
				     (unsigned long) cohc);

			list_add_tail(&cohc->chan.device_node,
				      &dma->channels);
		}
	}
}

static int __init coh901318_probe(struct platform_device *pdev)
{
	int err = 0;
	struct coh901318_platform *pdata;
	struct coh901318_base *base;
	int irq;
	struct resource *io;

	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!io)
2507
		return -ENODEV;
2508 2509

	/* Map DMA controller registers to virtual memory */
2510 2511 2512 2513 2514
	if (devm_request_mem_region(&pdev->dev,
				    io->start,
				    resource_size(io),
				    pdev->dev.driver->name) == NULL)
		return -ENOMEM;
2515

2516
	pdata = &coh901318_platform,
2517

2518 2519 2520 2521 2522
	base = devm_kzalloc(&pdev->dev,
			    ALIGN(sizeof(struct coh901318_base), 4) +
			    pdata->max_channels *
			    sizeof(struct coh901318_chan),
			    GFP_KERNEL);
2523
	if (!base)
2524
		return -ENOMEM;
2525 2526 2527

	base->chans = ((void *)base) + ALIGN(sizeof(struct coh901318_base), 4);

2528 2529 2530
	base->virtbase = devm_ioremap(&pdev->dev, io->start, resource_size(io));
	if (!base->virtbase)
		return -ENOMEM;
2531 2532 2533 2534 2535 2536 2537 2538 2539 2540

	base->dev = &pdev->dev;
	base->platform = pdata;
	spin_lock_init(&base->pm.lock);
	base->pm.started_channels = 0;

	COH901318_DEBUGFS_ASSIGN(debugfs_dma_base, base);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
2541 2542 2543 2544 2545 2546
		return irq;

	err = devm_request_irq(&pdev->dev, irq, dma_irq_handler, IRQF_DISABLED,
			       "coh901318", base);
	if (err)
		return err;
2547 2548 2549 2550 2551

	err = coh901318_pool_create(&base->pool, &pdev->dev,
				    sizeof(struct coh901318_lli),
				    32);
	if (err)
2552
		return err;
2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563

	/* init channels for device transfers */
	coh901318_base_init(&base->dma_slave,  base->platform->chans_slave,
			    base);

	dma_cap_zero(base->dma_slave.cap_mask);
	dma_cap_set(DMA_SLAVE, base->dma_slave.cap_mask);

	base->dma_slave.device_alloc_chan_resources = coh901318_alloc_chan_resources;
	base->dma_slave.device_free_chan_resources = coh901318_free_chan_resources;
	base->dma_slave.device_prep_slave_sg = coh901318_prep_slave_sg;
2564
	base->dma_slave.device_tx_status = coh901318_tx_status;
2565
	base->dma_slave.device_issue_pending = coh901318_issue_pending;
2566
	base->dma_slave.device_control = coh901318_control;
2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583
	base->dma_slave.dev = &pdev->dev;

	err = dma_async_device_register(&base->dma_slave);

	if (err)
		goto err_register_slave;

	/* init channels for memcpy */
	coh901318_base_init(&base->dma_memcpy, base->platform->chans_memcpy,
			    base);

	dma_cap_zero(base->dma_memcpy.cap_mask);
	dma_cap_set(DMA_MEMCPY, base->dma_memcpy.cap_mask);

	base->dma_memcpy.device_alloc_chan_resources = coh901318_alloc_chan_resources;
	base->dma_memcpy.device_free_chan_resources = coh901318_free_chan_resources;
	base->dma_memcpy.device_prep_dma_memcpy = coh901318_prep_memcpy;
2584
	base->dma_memcpy.device_tx_status = coh901318_tx_status;
2585
	base->dma_memcpy.device_issue_pending = coh901318_issue_pending;
2586
	base->dma_memcpy.device_control = coh901318_control;
2587
	base->dma_memcpy.dev = &pdev->dev;
2588 2589 2590 2591 2592
	/*
	 * This controller can only access address at even 32bit boundaries,
	 * i.e. 2^2
	 */
	base->dma_memcpy.copy_align = 2;
2593 2594 2595 2596 2597
	err = dma_async_device_register(&base->dma_memcpy);

	if (err)
		goto err_register_memcpy;

2598
	platform_set_drvdata(pdev, base);
2599
	dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
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		(u32) base->virtbase);

	return err;

 err_register_memcpy:
	dma_async_device_unregister(&base->dma_slave);
 err_register_slave:
	coh901318_pool_destroy(&base->pool);
	return err;
}

static int __exit coh901318_remove(struct platform_device *pdev)
{
	struct coh901318_base *base = platform_get_drvdata(pdev);

	dma_async_device_unregister(&base->dma_memcpy);
	dma_async_device_unregister(&base->dma_slave);
	coh901318_pool_destroy(&base->pool);
	return 0;
}


static struct platform_driver coh901318_driver = {
	.remove = __exit_p(coh901318_remove),
	.driver = {
		.name	= "coh901318",
	},
};

int __init coh901318_init(void)
{
	return platform_driver_probe(&coh901318_driver, coh901318_probe);
}
2633
subsys_initcall(coh901318_init);
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void __exit coh901318_exit(void)
{
	platform_driver_unregister(&coh901318_driver);
}
module_exit(coh901318_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Per Friden");
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