linux-imx

/*

 * 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... */

#include <linux/scatterlist.h>

#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>

#include <linux/platform_data/dma-coh901318.h>

#include <linux/of_dma.h>

​

#include "coh901318.h"

#include "dmaengine.h"

​

#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)

 */