198 lines
6.1 KiB
C
198 lines
6.1 KiB
C
/*
|
|
* Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
|
|
*
|
|
* Author:
|
|
* Zhang Wei <wei.zhang@freescale.com>, Jul 2007
|
|
* Ebony Zhu <ebony.zhu@freescale.com>, May 2007
|
|
*
|
|
* This is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
*/
|
|
#ifndef __DMA_FSLDMA_H
|
|
#define __DMA_FSLDMA_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/dmapool.h>
|
|
#include <linux/dmaengine.h>
|
|
|
|
/* Define data structures needed by Freescale
|
|
* MPC8540 and MPC8349 DMA controller.
|
|
*/
|
|
#define FSL_DMA_MR_CS 0x00000001
|
|
#define FSL_DMA_MR_CC 0x00000002
|
|
#define FSL_DMA_MR_CA 0x00000008
|
|
#define FSL_DMA_MR_EIE 0x00000040
|
|
#define FSL_DMA_MR_XFE 0x00000020
|
|
#define FSL_DMA_MR_EOLNIE 0x00000100
|
|
#define FSL_DMA_MR_EOLSIE 0x00000080
|
|
#define FSL_DMA_MR_EOSIE 0x00000200
|
|
#define FSL_DMA_MR_CDSM 0x00000010
|
|
#define FSL_DMA_MR_CTM 0x00000004
|
|
#define FSL_DMA_MR_EMP_EN 0x00200000
|
|
#define FSL_DMA_MR_EMS_EN 0x00040000
|
|
#define FSL_DMA_MR_DAHE 0x00002000
|
|
#define FSL_DMA_MR_SAHE 0x00001000
|
|
|
|
/* Special MR definition for MPC8349 */
|
|
#define FSL_DMA_MR_EOTIE 0x00000080
|
|
|
|
#define FSL_DMA_SR_CH 0x00000020
|
|
#define FSL_DMA_SR_PE 0x00000010
|
|
#define FSL_DMA_SR_CB 0x00000004
|
|
#define FSL_DMA_SR_TE 0x00000080
|
|
#define FSL_DMA_SR_EOSI 0x00000002
|
|
#define FSL_DMA_SR_EOLSI 0x00000001
|
|
#define FSL_DMA_SR_EOCDI 0x00000001
|
|
#define FSL_DMA_SR_EOLNI 0x00000008
|
|
|
|
#define FSL_DMA_SATR_SBPATMU 0x20000000
|
|
#define FSL_DMA_SATR_STRANSINT_RIO 0x00c00000
|
|
#define FSL_DMA_SATR_SREADTYPE_SNOOP_READ 0x00050000
|
|
#define FSL_DMA_SATR_SREADTYPE_BP_IORH 0x00020000
|
|
#define FSL_DMA_SATR_SREADTYPE_BP_NREAD 0x00040000
|
|
#define FSL_DMA_SATR_SREADTYPE_BP_MREAD 0x00070000
|
|
|
|
#define FSL_DMA_DATR_DBPATMU 0x20000000
|
|
#define FSL_DMA_DATR_DTRANSINT_RIO 0x00c00000
|
|
#define FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE 0x00050000
|
|
#define FSL_DMA_DATR_DWRITETYPE_BP_FLUSH 0x00010000
|
|
|
|
#define FSL_DMA_EOL ((u64)0x1)
|
|
#define FSL_DMA_SNEN ((u64)0x10)
|
|
#define FSL_DMA_EOSIE 0x8
|
|
#define FSL_DMA_NLDA_MASK (~(u64)0x1f)
|
|
|
|
#define FSL_DMA_BCR_MAX_CNT 0x03ffffffu
|
|
|
|
#define FSL_DMA_DGSR_TE 0x80
|
|
#define FSL_DMA_DGSR_CH 0x20
|
|
#define FSL_DMA_DGSR_PE 0x10
|
|
#define FSL_DMA_DGSR_EOLNI 0x08
|
|
#define FSL_DMA_DGSR_CB 0x04
|
|
#define FSL_DMA_DGSR_EOSI 0x02
|
|
#define FSL_DMA_DGSR_EOLSI 0x01
|
|
|
|
typedef u64 __bitwise v64;
|
|
typedef u32 __bitwise v32;
|
|
|
|
struct fsl_dma_ld_hw {
|
|
v64 src_addr;
|
|
v64 dst_addr;
|
|
v64 next_ln_addr;
|
|
v32 count;
|
|
v32 reserve;
|
|
} __attribute__((aligned(32)));
|
|
|
|
struct fsl_desc_sw {
|
|
struct fsl_dma_ld_hw hw;
|
|
struct list_head node;
|
|
struct dma_async_tx_descriptor async_tx;
|
|
struct list_head *ld;
|
|
void *priv;
|
|
} __attribute__((aligned(32)));
|
|
|
|
struct fsl_dma_chan_regs {
|
|
u32 mr; /* 0x00 - Mode Register */
|
|
u32 sr; /* 0x04 - Status Register */
|
|
u64 cdar; /* 0x08 - Current descriptor address register */
|
|
u64 sar; /* 0x10 - Source Address Register */
|
|
u64 dar; /* 0x18 - Destination Address Register */
|
|
u32 bcr; /* 0x20 - Byte Count Register */
|
|
u64 ndar; /* 0x24 - Next Descriptor Address Register */
|
|
};
|
|
|
|
struct fsl_dma_chan;
|
|
#define FSL_DMA_MAX_CHANS_PER_DEVICE 4
|
|
|
|
struct fsl_dma_device {
|
|
void __iomem *reg_base; /* DGSR register base */
|
|
struct resource reg; /* Resource for register */
|
|
struct device *dev;
|
|
struct dma_device common;
|
|
struct fsl_dma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE];
|
|
u32 feature; /* The same as DMA channels */
|
|
};
|
|
|
|
/* Define macros for fsl_dma_chan->feature property */
|
|
#define FSL_DMA_LITTLE_ENDIAN 0x00000000
|
|
#define FSL_DMA_BIG_ENDIAN 0x00000001
|
|
|
|
#define FSL_DMA_IP_MASK 0x00000ff0
|
|
#define FSL_DMA_IP_85XX 0x00000010
|
|
#define FSL_DMA_IP_83XX 0x00000020
|
|
|
|
#define FSL_DMA_CHAN_PAUSE_EXT 0x00001000
|
|
#define FSL_DMA_CHAN_START_EXT 0x00002000
|
|
|
|
struct fsl_dma_chan {
|
|
struct fsl_dma_chan_regs __iomem *reg_base;
|
|
dma_cookie_t completed_cookie; /* The maximum cookie completed */
|
|
spinlock_t desc_lock; /* Descriptor operation lock */
|
|
struct list_head ld_queue; /* Link descriptors queue */
|
|
struct dma_chan common; /* DMA common channel */
|
|
struct dma_pool *desc_pool; /* Descriptors pool */
|
|
struct device *dev; /* Channel device */
|
|
struct resource reg; /* Resource for register */
|
|
int irq; /* Channel IRQ */
|
|
int id; /* Raw id of this channel */
|
|
struct tasklet_struct tasklet;
|
|
u32 feature;
|
|
|
|
void (*toggle_ext_pause)(struct fsl_dma_chan *fsl_chan, int size);
|
|
void (*toggle_ext_start)(struct fsl_dma_chan *fsl_chan, int enable);
|
|
void (*set_src_loop_size)(struct fsl_dma_chan *fsl_chan, int size);
|
|
void (*set_dest_loop_size)(struct fsl_dma_chan *fsl_chan, int size);
|
|
};
|
|
|
|
#define to_fsl_chan(chan) container_of(chan, struct fsl_dma_chan, common)
|
|
#define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node)
|
|
#define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx)
|
|
|
|
#ifndef __powerpc64__
|
|
static u64 in_be64(const u64 __iomem *addr)
|
|
{
|
|
return ((u64)in_be32((u32 __iomem *)addr) << 32) |
|
|
(in_be32((u32 __iomem *)addr + 1));
|
|
}
|
|
|
|
static void out_be64(u64 __iomem *addr, u64 val)
|
|
{
|
|
out_be32((u32 __iomem *)addr, val >> 32);
|
|
out_be32((u32 __iomem *)addr + 1, (u32)val);
|
|
}
|
|
|
|
/* There is no asm instructions for 64 bits reverse loads and stores */
|
|
static u64 in_le64(const u64 __iomem *addr)
|
|
{
|
|
return ((u64)in_le32((u32 __iomem *)addr + 1) << 32) |
|
|
(in_le32((u32 __iomem *)addr));
|
|
}
|
|
|
|
static void out_le64(u64 __iomem *addr, u64 val)
|
|
{
|
|
out_le32((u32 __iomem *)addr + 1, val >> 32);
|
|
out_le32((u32 __iomem *)addr, (u32)val);
|
|
}
|
|
#endif
|
|
|
|
#define DMA_IN(fsl_chan, addr, width) \
|
|
(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
|
|
in_be##width(addr) : in_le##width(addr))
|
|
#define DMA_OUT(fsl_chan, addr, val, width) \
|
|
(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
|
|
out_be##width(addr, val) : out_le##width(addr, val))
|
|
|
|
#define DMA_TO_CPU(fsl_chan, d, width) \
|
|
(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
|
|
be##width##_to_cpu((__force __be##width)(v##width)d) : \
|
|
le##width##_to_cpu((__force __le##width)(v##width)d))
|
|
#define CPU_TO_DMA(fsl_chan, c, width) \
|
|
(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
|
|
(__force v##width)cpu_to_be##width(c) : \
|
|
(__force v##width)cpu_to_le##width(c))
|
|
|
|
#endif /* __DMA_FSLDMA_H */
|