coh901318.c 80.9 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 "coh901318.h"
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#include "dmaengine.h"
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#define COH901318_MOD32_MASK					(0x1F)
#define COH901318_WORD_MASK					(0xFFFFFFFF)
/* INT_STATUS - Interrupt Status Registers 32bit (R/-) */
#define COH901318_INT_STATUS1					(0x0000)
#define COH901318_INT_STATUS2					(0x0004)
/* TC_INT_STATUS - Terminal Count Interrupt Status Registers 32bit (R/-) */
#define COH901318_TC_INT_STATUS1				(0x0008)
#define COH901318_TC_INT_STATUS2				(0x000C)
/* TC_INT_CLEAR - Terminal Count Interrupt Clear Registers 32bit (-/W) */
#define COH901318_TC_INT_CLEAR1					(0x0010)
#define COH901318_TC_INT_CLEAR2					(0x0014)
/* RAW_TC_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */
#define COH901318_RAW_TC_INT_STATUS1				(0x0018)
#define COH901318_RAW_TC_INT_STATUS2				(0x001C)
/* BE_INT_STATUS - Bus Error Interrupt Status Registers 32bit (R/-) */
#define COH901318_BE_INT_STATUS1				(0x0020)
#define COH901318_BE_INT_STATUS2				(0x0024)
/* BE_INT_CLEAR - Bus Error Interrupt Clear Registers 32bit (-/W) */
#define COH901318_BE_INT_CLEAR1					(0x0028)
#define COH901318_BE_INT_CLEAR2					(0x002C)
/* RAW_BE_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */
#define COH901318_RAW_BE_INT_STATUS1				(0x0030)
#define COH901318_RAW_BE_INT_STATUS2				(0x0034)

/*
 * CX_CFG - Channel Configuration Registers 32bit (R/W)
 */
#define COH901318_CX_CFG					(0x0100)
#define COH901318_CX_CFG_SPACING				(0x04)
/* Channel enable activates tha dma job */
#define COH901318_CX_CFG_CH_ENABLE				(0x00000001)
#define COH901318_CX_CFG_CH_DISABLE				(0x00000000)
/* Request Mode */
#define COH901318_CX_CFG_RM_MASK				(0x00000006)
#define COH901318_CX_CFG_RM_MEMORY_TO_MEMORY			(0x0 << 1)
#define COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY			(0x1 << 1)
#define COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY			(0x1 << 1)
#define COH901318_CX_CFG_RM_PRIMARY_TO_SECONDARY		(0x3 << 1)
#define COH901318_CX_CFG_RM_SECONDARY_TO_PRIMARY		(0x3 << 1)
/* Linked channel request field. RM must == 11 */
#define COH901318_CX_CFG_LCRF_SHIFT				3
#define COH901318_CX_CFG_LCRF_MASK				(0x000001F8)
#define COH901318_CX_CFG_LCR_DISABLE				(0x00000000)
/* Terminal Counter Interrupt Request Mask */
#define COH901318_CX_CFG_TC_IRQ_ENABLE				(0x00000200)
#define COH901318_CX_CFG_TC_IRQ_DISABLE				(0x00000000)
/* Bus Error interrupt Mask */
#define COH901318_CX_CFG_BE_IRQ_ENABLE				(0x00000400)
#define COH901318_CX_CFG_BE_IRQ_DISABLE				(0x00000000)

/*
 * CX_STAT - Channel Status Registers 32bit (R/-)
 */
#define COH901318_CX_STAT					(0x0200)
#define COH901318_CX_STAT_SPACING				(0x04)
#define COH901318_CX_STAT_RBE_IRQ_IND				(0x00000008)
#define COH901318_CX_STAT_RTC_IRQ_IND				(0x00000004)
#define COH901318_CX_STAT_ACTIVE				(0x00000002)
#define COH901318_CX_STAT_ENABLED				(0x00000001)

/*
 * CX_CTRL - Channel Control Registers 32bit (R/W)
 */
#define COH901318_CX_CTRL					(0x0400)
#define COH901318_CX_CTRL_SPACING				(0x10)
/* Transfer Count Enable */
#define COH901318_CX_CTRL_TC_ENABLE				(0x00001000)
#define COH901318_CX_CTRL_TC_DISABLE				(0x00000000)
/* Transfer Count Value 0 - 4095 */
#define COH901318_CX_CTRL_TC_VALUE_MASK				(0x00000FFF)
/* Burst count */
#define COH901318_CX_CTRL_BURST_COUNT_MASK			(0x0000E000)
#define COH901318_CX_CTRL_BURST_COUNT_64_BYTES			(0x7 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_48_BYTES			(0x6 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_32_BYTES			(0x5 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_16_BYTES			(0x4 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_8_BYTES			(0x3 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_4_BYTES			(0x2 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_2_BYTES			(0x1 << 13)
#define COH901318_CX_CTRL_BURST_COUNT_1_BYTE			(0x0 << 13)
/* Source bus size  */
#define COH901318_CX_CTRL_SRC_BUS_SIZE_MASK			(0x00030000)
#define COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS			(0x2 << 16)
#define COH901318_CX_CTRL_SRC_BUS_SIZE_16_BITS			(0x1 << 16)
#define COH901318_CX_CTRL_SRC_BUS_SIZE_8_BITS			(0x0 << 16)
/* Source address increment */
#define COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE			(0x00040000)
#define COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE			(0x00000000)
/* Destination Bus Size */
#define COH901318_CX_CTRL_DST_BUS_SIZE_MASK			(0x00180000)
#define COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS			(0x2 << 19)
#define COH901318_CX_CTRL_DST_BUS_SIZE_16_BITS			(0x1 << 19)
#define COH901318_CX_CTRL_DST_BUS_SIZE_8_BITS			(0x0 << 19)
/* Destination address increment */
#define COH901318_CX_CTRL_DST_ADDR_INC_ENABLE			(0x00200000)
#define COH901318_CX_CTRL_DST_ADDR_INC_DISABLE			(0x00000000)
/* Master Mode (Master2 is only connected to MSL) */
#define COH901318_CX_CTRL_MASTER_MODE_MASK			(0x00C00000)
#define COH901318_CX_CTRL_MASTER_MODE_M2R_M1W			(0x3 << 22)
#define COH901318_CX_CTRL_MASTER_MODE_M1R_M2W			(0x2 << 22)
#define COH901318_CX_CTRL_MASTER_MODE_M2RW			(0x1 << 22)
#define COH901318_CX_CTRL_MASTER_MODE_M1RW			(0x0 << 22)
/* Terminal Count flag to PER enable */
#define COH901318_CX_CTRL_TCP_ENABLE				(0x01000000)
#define COH901318_CX_CTRL_TCP_DISABLE				(0x00000000)
/* Terminal Count flags to CPU enable */
#define COH901318_CX_CTRL_TC_IRQ_ENABLE				(0x02000000)
#define COH901318_CX_CTRL_TC_IRQ_DISABLE			(0x00000000)
/* Hand shake to peripheral */
#define COH901318_CX_CTRL_HSP_ENABLE				(0x04000000)
#define COH901318_CX_CTRL_HSP_DISABLE				(0x00000000)
#define COH901318_CX_CTRL_HSS_ENABLE				(0x08000000)
#define COH901318_CX_CTRL_HSS_DISABLE				(0x00000000)
/* DMA mode */
#define COH901318_CX_CTRL_DDMA_MASK				(0x30000000)
#define COH901318_CX_CTRL_DDMA_LEGACY				(0x0 << 28)
#define COH901318_CX_CTRL_DDMA_DEMAND_DMA1			(0x1 << 28)
#define COH901318_CX_CTRL_DDMA_DEMAND_DMA2			(0x2 << 28)
/* Primary Request Data Destination */
#define COH901318_CX_CTRL_PRDD_MASK				(0x40000000)
#define COH901318_CX_CTRL_PRDD_DEST				(0x1 << 30)
#define COH901318_CX_CTRL_PRDD_SOURCE				(0x0 << 30)

/*
 * CX_SRC_ADDR - Channel Source Address Registers 32bit (R/W)
 */
#define COH901318_CX_SRC_ADDR					(0x0404)
#define COH901318_CX_SRC_ADDR_SPACING				(0x10)

/*
 * CX_DST_ADDR - Channel Destination Address Registers 32bit R/W
 */
#define COH901318_CX_DST_ADDR					(0x0408)
#define COH901318_CX_DST_ADDR_SPACING				(0x10)

/*
 * CX_LNK_ADDR - Channel Link Address Registers 32bit (R/W)
 */
#define COH901318_CX_LNK_ADDR					(0x040C)
#define COH901318_CX_LNK_ADDR_SPACING				(0x10)
#define COH901318_CX_LNK_LINK_IMMEDIATE				(0x00000001)

/**
 * struct coh901318_params - parameters for DMAC configuration
 * @config: DMA config register
 * @ctrl_lli_last: DMA control register for the last lli in the list
 * @ctrl_lli: DMA control register for an lli
 * @ctrl_lli_chained: DMA control register for a chained lli
 */
struct coh901318_params {
	u32 config;
	u32 ctrl_lli_last;
	u32 ctrl_lli;
	u32 ctrl_lli_chained;
};

/**
 * struct coh_dma_channel - dma channel base
 * @name: ascii name of dma channel
 * @number: channel id number
 * @desc_nbr_max: number of preallocated descriptors
 * @priority_high: prio of channel, 0 low otherwise high.
 * @param: configuration parameters
 */
struct coh_dma_channel {
	const char name[32];
	const int number;
	const int desc_nbr_max;
	const int priority_high;
	const struct coh901318_params param;
};

/**
 * dma_access_memory_state_t - register dma for memory access
 *
 * @dev: The dma device
 * @active:  1 means dma intends to access memory
 *           0 means dma wont access memory
 */
typedef void (*dma_access_memory_state_t)(struct device *dev,
					  bool active);

/**
 * struct powersave - DMA power save structure
 * @lock: lock protecting data in this struct
 * @started_channels: bit mask indicating active dma channels
 */
struct powersave {
	spinlock_t lock;
	u64 started_channels;
};

/**
 * struct coh901318_platform - platform arch structure
 * @chans_slave: specifying dma slave channels
 * @chans_memcpy: specifying dma memcpy channels
 * @access_memory_state: requesting DMA memory access (on / off)
 * @chan_conf: dma channel configurations
 * @max_channels: max number of dma chanenls
 */
struct coh901318_platform {
	const int *chans_slave;
	const int *chans_memcpy;
	const dma_access_memory_state_t access_memory_state;
	const struct coh_dma_channel *chan_conf;
	const int max_channels;
};

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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,
};

1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314
#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;
1315
	struct coh901318_lli *lli;
1316
	enum dma_transfer_direction dir;
1317
	unsigned long flags;
1318 1319
	u32 head_config;
	u32 head_ctrl;
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
};

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;

1351 1352
	u32 addr;
	u32 ctrl;
1353

1354 1355 1356 1357 1358 1359
	struct coh901318_base *base;
};

static void coh901318_list_print(struct coh901318_chan *cohc,
				 struct coh901318_lli *lli)
{
1360
	struct coh901318_lli *l = lli;
1361 1362
	int i = 0;

1363
	while (l) {
1364
		dev_vdbg(COHC_2_DEV(cohc), "i %d, lli %p, ctrl 0x%x, src 0x%x"
1365
			 ", dst 0x%x, link 0x%x virt_link_addr 0x%p\n",
1366
			 i, l, l->control, l->src_addr, l->dst_addr,
1367
			 l->link_addr, l->virt_link_addr);
1368
		i++;
1369
		l = l->virt_link_addr;
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
	}
}

#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;

1396
	tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426

	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,
1427
	.open		= simple_open,
1428
	.read		= coh901318_debugfs_read,
1429
	.llseek		= default_llseek,
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 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 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
};


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 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,
1553
				      struct coh901318_lli *lli)
1554 1555 1556 1557 1558 1559 1560 1561
{
	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);

1562
	writel(lli->src_addr,
1563 1564 1565
	       virtbase + COH901318_CX_SRC_ADDR +
	       COH901318_CX_SRC_ADDR_SPACING * channel);

1566
	writel(lli->dst_addr, virtbase +
1567 1568 1569
	       COH901318_CX_DST_ADDR +
	       COH901318_CX_DST_ADDR_SPACING * channel);

1570
	writel(lli->link_addr, virtbase + COH901318_CX_LNK_ADDR +
1571 1572
	       COH901318_CX_LNK_ADDR_SPACING * channel);

1573
	writel(lli->control, virtbase + COH901318_CX_CTRL +
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
	       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.
		 */
1589
		desc = kzalloc(sizeof(struct coh901318_desc), GFP_NOWAIT);
1590 1591 1592
		if (desc == NULL)
			goto out;
		INIT_LIST_HEAD(&desc->node);
1593
		dma_async_tx_descriptor_init(&desc->desc, &cohc->chan);
1594 1595 1596 1597 1598 1599
	} else {
		/* Reuse an old desc. */
		desc = list_first_entry(&cohc->free,
					struct coh901318_desc,
					node);
		list_del(&desc->node);
1600 1601 1602 1603 1604
		/* 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;
1605 1606 1607 1608 1609 1610 1611 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
	}

 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;
}

1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
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;
}

1676
/*
1677 1678 1679 1680
 * 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.
1681
 */
1682
static u32 coh901318_get_bytes_left(struct dma_chan *chan)
1683 1684
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
1685 1686 1687 1688 1689
	struct coh901318_desc *cohd;
	struct list_head *pos;
	unsigned long flags;
	u32 left = 0;
	int i = 0;
1690 1691 1692

	spin_lock_irqsave(&cohc->lock, flags);

1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753
	/*
	 * 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);
	}
1754 1755 1756

	spin_unlock_irqrestore(&cohc->lock, flags);

1757
	return left;
1758 1759
}

1760 1761 1762 1763 1764
/*
 * 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)
1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777
{
	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
1778
	/* Stopping infinite transfer */
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805
	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);
}

1806
/* Resumes a transfer that has been stopped via 300_dma_stop(..).
1807 1808
   Power save is handled.
*/
1809
static void coh901318_resume(struct dma_chan *chan)
1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 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
{
	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)
{
1893
	struct coh901318_desc *cohd;
1894

1895 1896
	/*
	 * start queued jobs, if any
1897 1898
	 * TODO: transmit all queued jobs in one go
	 */
1899
	cohd = coh901318_first_queued(cohc);
1900

1901
	if (cohd != NULL) {
1902
		/* Remove from queue */
1903
		coh901318_desc_remove(cohd);
1904 1905 1906
		/* initiate DMA job */
		cohc->busy = 1;

1907
		coh901318_desc_submit(cohc, cohd);
1908

1909 1910 1911
		/* Program the transaction head */
		coh901318_set_conf(cohc, cohd->head_config);
		coh901318_set_ctrl(cohc, cohd->head_ctrl);
1912
		coh901318_prep_linked_list(cohc, cohd->lli);
1913

1914
		/* start dma job on this channel */
1915 1916 1917 1918
		coh901318_start(cohc);

	}

1919
	return cohd;
1920 1921
}

1922 1923 1924 1925
/*
 * This tasklet is called from the interrupt handler to
 * handle each descriptor (DMA job) that is sent to a channel.
 */
1926 1927 1928 1929 1930 1931 1932 1933
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;

1934 1935 1936 1937
	dev_vdbg(COHC_2_DEV(cohc), "[%s] chan_id %d"
		 " nbr_active_done %ld\n", __func__,
		 cohc->id, cohc->nbr_active_done);

1938 1939
	spin_lock_irqsave(&cohc->lock, flags);

1940
	/* get first active descriptor entry from list */
1941 1942 1943 1944 1945
	cohd_fin = coh901318_first_active_get(cohc);

	if (cohd_fin == NULL)
		goto err;

1946 1947 1948
	/* locate callback to client */
	callback = cohd_fin->desc.callback;
	callback_param = cohd_fin->desc.callback_param;
1949

1950
	/* sign this job as completed on the channel */
1951
	dma_cookie_complete(&cohd_fin->desc);
1952

1953
	/* release the lli allocation and remove the descriptor */
1954
	coh901318_lli_free(&cohc->base->pool, &cohd_fin->lli);
1955

1956 1957 1958
	/* return desc to free-list */
	coh901318_desc_remove(cohd_fin);
	coh901318_desc_free(cohc, cohd_fin);
1959

1960
	spin_unlock_irqrestore(&cohc->lock, flags);
1961

1962 1963 1964
	/* Call the callback when we're done */
	if (callback)
		callback(callback_param);
1965

1966
	spin_lock_irqsave(&cohc->lock, flags);
1967

1968 1969 1970 1971 1972 1973 1974
	/*
	 * 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.
	 */
1975
	cohc->nbr_active_done--;
1976
	if (cohc->nbr_active_done) {
1977 1978
		dev_dbg(COHC_2_DEV(cohc), "scheduling tasklet again, new IRQs "
			"came in while we were scheduling this tasklet\n");
1979 1980 1981 1982 1983 1984
		if (cohc_chan_conf(cohc)->priority_high)
			tasklet_hi_schedule(&cohc->tasklet);
		else
			tasklet_schedule(&cohc->tasklet);
	}

1985
	spin_unlock_irqrestore(&cohc->lock, flags);
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997

	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)
{
1998 1999 2000 2001 2002 2003 2004
	/*
	 * 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");
2005
		return;
2006
	}
2007

2008
	spin_lock(&cohc->lock);
2009

2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	/*
	 * 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));

2021 2022
	cohc->nbr_active_done++;

2023 2024 2025 2026
	/*
	 * This attempt to take a job from cohc->queue, put it
	 * into cohc->active and start it.
	 */
2027
	if (coh901318_queue_start(cohc) == NULL)
2028 2029
		cohc->busy = 0;

2030 2031
	spin_unlock(&cohc->lock);

2032 2033 2034 2035
	/*
	 * This tasklet will remove items from cohc->active
	 * and thus terminates them.
	 */
2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
	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
2101
				 * in case tc_handle initiate a new dma job
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145
				 */
				__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
2146
				 * in case tc_handle initiate a new dma job
2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161
				 */
				__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);
2162
	unsigned long flags;
2163 2164 2165 2166 2167 2168 2169

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

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

2170 2171
	spin_lock_irqsave(&cohc->lock, flags);

2172 2173 2174
	coh901318_config(cohc, NULL);

	cohc->allocated = 1;
2175
	dma_cookie_init(chan);
2176

2177 2178
	spin_unlock_irqrestore(&cohc->lock, flags);

2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200
	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);

2201
	chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
2202 2203 2204 2205 2206 2207 2208 2209 2210 2211
}


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;
2212
	dma_cookie_t cookie;
2213 2214

	spin_lock_irqsave(&cohc->lock, flags);
2215
	cookie = dma_cookie_assign(tx);
2216 2217 2218 2219 2220

	coh901318_desc_queue(cohc, cohd);

	spin_unlock_irqrestore(&cohc->lock, flags);

2221
	return cookie;
2222 2223 2224 2225 2226 2227
}

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)
{
2228
	struct coh901318_lli *lli;
2229 2230 2231 2232 2233
	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;
2234
	int ret;
2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249

	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++;

2250
	lli = coh901318_lli_alloc(&cohc->base->pool, lli_len);
2251

2252
	if (lli == NULL)
2253 2254
		goto err;

2255
	ret = coh901318_lli_fill_memcpy(
2256
		&cohc->base->pool, lli, src, size, dest,
2257 2258 2259 2260
		cohc_chan_param(cohc)->ctrl_lli_chained,
		ctrl_last);
	if (ret)
		goto err;
2261

2262
	COH_DBG(coh901318_list_print(cohc, lli));
2263

2264 2265
	/* Pick a descriptor to handle this transfer */
	cohd = coh901318_desc_get(cohc);
2266
	cohd->lli = lli;
2267
	cohd->flags = flags;
2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279
	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,
2280
			unsigned int sg_len, enum dma_transfer_direction direction,
2281
			unsigned long flags, void *context)
2282 2283
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
2284
	struct coh901318_lli *lli;
2285
	struct coh901318_desc *cohd;
2286
	const struct coh901318_params *params;
2287 2288 2289 2290 2291 2292 2293
	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;
2294
	u32 config;
2295
	unsigned long flg;
2296
	int ret;
2297 2298 2299

	if (!sgl)
		goto out;
2300
	if (sg_dma_len(sgl) == 0)
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311
		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;

2312 2313
	params = cohc_chan_param(cohc);
	config = params->config;
2314 2315 2316 2317 2318
	/*
	 * Add runtime-specific control on top, make
	 * sure the bits you set per peripheral channel are
	 * cleared in the default config from the platform.
	 */
2319 2320 2321
	ctrl_chained |= cohc->ctrl;
	ctrl_last |= cohc->ctrl;
	ctrl |= cohc->ctrl;
2322

2323
	if (direction == DMA_MEM_TO_DEV) {
2324 2325 2326
		u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE |
			COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE;

2327
		config |= COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY;
2328 2329 2330
		ctrl_chained |= tx_flags;
		ctrl_last |= tx_flags;
		ctrl |= tx_flags;
2331
	} else if (direction == DMA_DEV_TO_MEM) {
2332 2333 2334
		u32 rx_flags = COH901318_CX_CTRL_PRDD_DEST |
			COH901318_CX_CTRL_DST_ADDR_INC_ENABLE;

2335
		config |= COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY;
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
		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;
	}

2362
	pr_debug("Allocate %d lli:s for this transfer\n", len);
2363
	lli = coh901318_lli_alloc(&cohc->base->pool, len);
2364

2365
	if (lli == NULL)
2366 2367
		goto err_dma_alloc;

2368 2369
	/* initiate allocated lli list */
	ret = coh901318_lli_fill_sg(&cohc->base->pool, lli, sgl, sg_len,
2370
				    cohc->addr,
2371 2372 2373 2374 2375 2376
				    ctrl_chained,
				    ctrl,
				    ctrl_last,
				    direction, COH901318_CX_CTRL_TC_IRQ_ENABLE);
	if (ret)
		goto err_lli_fill;
2377

2378

2379
	COH_DBG(coh901318_list_print(cohc, lli));
2380

2381 2382
	/* Pick a descriptor to handle this transfer */
	cohd = coh901318_desc_get(cohc);
2383 2384 2385 2386 2387 2388 2389
	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;
2390 2391 2392
	cohd->dir = direction;
	cohd->flags = flags;
	cohd->desc.tx_submit = coh901318_tx_submit;
2393
	cohd->lli = lli;
2394

2395 2396 2397
	spin_unlock_irqrestore(&cohc->lock, flg);

	return &cohd->desc;
2398
 err_lli_fill:
2399 2400 2401 2402 2403 2404 2405 2406
 err_dma_alloc:
 err_direction:
	spin_unlock_irqrestore(&cohc->lock, flg);
 out:
	return NULL;
}

static enum dma_status
2407 2408
coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
		 struct dma_tx_state *txstate)
2409 2410
{
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
2411
	enum dma_status ret;
2412

2413 2414 2415
	ret = dma_cookie_status(chan, cookie, txstate);
	/* FIXME: should be conditional on ret != DMA_SUCCESS? */
	dma_set_residue(txstate, coh901318_get_bytes_left(chan));
2416

2417 2418
	if (ret == DMA_IN_PROGRESS && cohc->stopped)
		ret = DMA_PAUSED;
2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430

	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);

2431 2432 2433 2434 2435 2436
	/*
	 * 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.
	 */
2437 2438 2439 2440 2441 2442
	if (!cohc->busy)
		coh901318_queue_start(cohc);

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

2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 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 2507 2508 2509 2510
/*
 * 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;
2511
	u32 ctrl = 0;
2512 2513 2514
	int i = 0;

	/* We only support mem to per or per to mem transfers */
2515
	if (config->direction == DMA_DEV_TO_MEM) {
2516 2517 2518
		addr = config->src_addr;
		addr_width = config->src_addr_width;
		maxburst = config->src_maxburst;
2519
	} else if (config->direction == DMA_MEM_TO_DEV) {
2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531
		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:
2532
		ctrl |=
2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543
			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:
2544
		ctrl |=
2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556
			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 */
2557
		ctrl |=
2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
			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;
	}

2574
	ctrl |= burst_sizes[i].reg;
2575 2576 2577 2578
	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);

2579 2580
	cohc->addr = addr;
	cohc->ctrl = ctrl;
2581 2582
}

2583
static int
2584 2585
coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
		  unsigned long arg)
2586 2587 2588 2589 2590 2591
{
	unsigned long flags;
	struct coh901318_chan *cohc = to_coh901318_chan(chan);
	struct coh901318_desc *cohd;
	void __iomem *virtbase = cohc->base->virtbase;

2592 2593 2594 2595 2596 2597 2598 2599
	if (cmd == DMA_SLAVE_CONFIG) {
		struct dma_slave_config *config =
			(struct dma_slave_config *) arg;

		coh901318_dma_set_runtimeconfig(chan, config);
		return 0;
	  }

2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611
	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;
2612

2613 2614
	/* The remainder of this function terminates the transfer */
	coh901318_pause(chan);
2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631
	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*/
2632
		coh901318_lli_free(&cohc->base->pool, &cohd->lli);
2633 2634

		/* return desc to free-list */
2635
		coh901318_desc_remove(cohd);
2636 2637 2638 2639 2640
		coh901318_desc_free(cohc, cohd);
	}

	while ((cohd = coh901318_first_queued(cohc))) {
		/* release the lli allocation*/
2641
		coh901318_lli_free(&cohc->base->pool, &cohd->lli);
2642 2643

		/* return desc to free-list */
2644
		coh901318_desc_remove(cohd);
2645 2646 2647 2648 2649 2650 2651 2652
		coh901318_desc_free(cohc, cohd);
	}


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

	spin_unlock_irqrestore(&cohc->lock, flags);
2653 2654

	return 0;
2655
}
2656

2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704
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)
2705
		return -ENODEV;
2706 2707

	/* Map DMA controller registers to virtual memory */
2708 2709 2710 2711 2712
	if (devm_request_mem_region(&pdev->dev,
				    io->start,
				    resource_size(io),
				    pdev->dev.driver->name) == NULL)
		return -ENOMEM;
2713

2714
	pdata = &coh901318_platform,
2715

2716 2717 2718 2719 2720
	base = devm_kzalloc(&pdev->dev,
			    ALIGN(sizeof(struct coh901318_base), 4) +
			    pdata->max_channels *
			    sizeof(struct coh901318_chan),
			    GFP_KERNEL);
2721
	if (!base)
2722
		return -ENOMEM;
2723 2724 2725

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

2726 2727 2728
	base->virtbase = devm_ioremap(&pdev->dev, io->start, resource_size(io));
	if (!base->virtbase)
		return -ENOMEM;
2729 2730 2731 2732 2733 2734 2735 2736 2737 2738

	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)
2739 2740 2741 2742 2743 2744
		return irq;

	err = devm_request_irq(&pdev->dev, irq, dma_irq_handler, IRQF_DISABLED,
			       "coh901318", base);
	if (err)
		return err;
2745 2746 2747 2748 2749

	err = coh901318_pool_create(&base->pool, &pdev->dev,
				    sizeof(struct coh901318_lli),
				    32);
	if (err)
2750
		return err;
2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761

	/* 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;
2762
	base->dma_slave.device_tx_status = coh901318_tx_status;
2763
	base->dma_slave.device_issue_pending = coh901318_issue_pending;
2764
	base->dma_slave.device_control = coh901318_control;
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781
	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;
2782
	base->dma_memcpy.device_tx_status = coh901318_tx_status;
2783
	base->dma_memcpy.device_issue_pending = coh901318_issue_pending;
2784
	base->dma_memcpy.device_control = coh901318_control;
2785
	base->dma_memcpy.dev = &pdev->dev;
2786 2787 2788 2789 2790
	/*
	 * This controller can only access address at even 32bit boundaries,
	 * i.e. 2^2
	 */
	base->dma_memcpy.copy_align = 2;
2791 2792 2793 2794 2795
	err = dma_async_device_register(&base->dma_memcpy);

	if (err)
		goto err_register_memcpy;

2796
	platform_set_drvdata(pdev, base);
2797
	dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830
		(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);
}
2831
subsys_initcall(coh901318_init);
2832 2833 2834 2835 2836 2837 2838 2839 2840

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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