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openwrt-xburst/target/linux/xburst/files-2.6.27/include/asm-mips/mach-jz4750/dma.h
Mirko Vogt dc3d3f1c49 yet another patchset - 2.6.27 
it's basically also provided by ingenic and nativly based on 2.6.27,
adjusted to fit into the OpenWrt-environment
2009-10-28 03:13:11 +08:00

308 lines
9.6 KiB
C
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/*
* linux/include/asm-mips/mach-jz4750/dma.h
*
* JZ4750 DMA definition.
*
* Copyright (C) 2008 Ingenic Semiconductor Inc.
*
* Author: <cwjia@ingenic.cn>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_JZ4750_DMA_H__
#define __ASM_JZ4750_DMA_H__
#include <linux/interrupt.h>
#include <asm/io.h> /* need byte IO */
#include <linux/spinlock.h> /* And spinlocks */
#include <linux/delay.h>
#include <asm/system.h>
/*
* Descriptor structure for JZ4750 DMA engine
* Note: this structure must always be aligned to a 16-bytes boundary.
*/
/* old descriptor 4-word */
typedef struct {
volatile u32 dcmd; /* DCMD value for the current transfer */
volatile u32 dsadr; /* DSAR value for the current transfer */
volatile u32 dtadr; /* DTAR value for the current transfer */
volatile u32 ddadr; /* Points to the next descriptor + transfer count */
} jz_dma_desc;
/* new descriptor 8-word */
typedef struct {
volatile u32 dcmd; /* DCMD value for the current transfer */
volatile u32 dsadr; /* DSAR value for the current transfer */
volatile u32 dtadr; /* DTAR value for the current transfer */
volatile u32 ddadr; /* Points to the next descriptor + transfer count */
volatile u32 dstrd; /* DMA source and target stride address */
volatile u32 dreqt; /* DMA request type for current transfer */
volatile u32 reserved0; /* Reserved */
volatile u32 reserved1; /* Reserved */
} jz_dma_desc_8word;
/* DMA Device ID's follow */
enum {
DMA_ID_EXT = 0, /* External request with DREQn */
DMA_ID_NAND, /* NAND DMA request */
DMA_ID_BCH_ENC, /* BCH Encoding DMA request */
DMA_ID_BCH_DEC, /* BCH Decoding DMA request */
DMA_ID_AUTO, /* Auto-request */
// DMA_ID_TSSI_RX, /* TSSI receive fifo full request */
DMA_ID_UART3_TX, /* UART3 transmit-fifo-empty request */
DMA_ID_UART3_RX, /* UART3 receve-fifo-full request */
DMA_ID_UART2_TX, /* UART2 transmit-fifo-empty request */
DMA_ID_UART2_RX, /* UART2 receve-fifo-full request */
DMA_ID_UART1_TX, /* UART1 transmit-fifo-empty request */
DMA_ID_UART1_RX, /* UART1 receve-fifo-full request */
DMA_ID_UART0_TX, /* UART0 transmit-fifo-empty request */
DMA_ID_UART0_RX, /* UART0 receve-fifo-full request */
DMA_ID_SSI0_TX, /* SSI0 transmit-fifo-full request */
DMA_ID_SSI0_RX, /* SSI0 receive-fifo-empty request */
DMA_ID_AIC_TX, /* AIC transmit-fifo-full request */
DMA_ID_AIC_RX, /* AIC receive-fifo-empty request */
DMA_ID_MSC0_TX, /* MSC0 transmit-fifo-full request */
DMA_ID_MSC0_RX, /* MSC0 receive-fifo-empty request */
DMA_ID_TCU_OVERFLOW, /* TCU channel n overflow interrupt */
DMA_ID_SADC, /* SADC transfer request */
DMA_ID_MSC1_TX, /* MSC1 transmit-fifo-full request */
DMA_ID_MSC1_RX, /* MSC1 receive-fifo-empty request */
DMA_ID_SSI1_TX, /* SSI1 transmit-fifo-full request */
DMA_ID_SSI1_RX, /* SSI1 receive-fifo-empty request */
DMA_ID_PCM_TX, /* PM transmit-fifo-full request */
DMA_ID_PCM_RX, /* PM receive-fifo-empty request */
DMA_ID_RAW_SET,
DMA_ID_MAX
};
/* DMA modes, simulated by sw */
#define DMA_MODE_READ 0x0 /* I/O to memory, no autoinit, increment, single mode */
#define DMA_MODE_WRITE 0x1 /* memory to I/O, no autoinit, increment, single mode */
#define DMA_AUTOINIT 0x2
#define DMA_MODE_MASK 0x3
struct jz_dma_chan {
int dev_id; /* DMA ID: this channel is allocated if >=0, free otherwise */
unsigned int io; /* DMA channel number */
const char *dev_str; /* string describes the DMA channel */
int irq; /* DMA irq number */
void *irq_dev; /* DMA private device structure */
unsigned int fifo_addr; /* physical fifo address of the requested device */
unsigned int cntl; /* DMA controll */
unsigned int mode; /* DMA configuration */
unsigned int source; /* DMA request source */
};
extern struct jz_dma_chan jz_dma_table[];
#define DMA_8BIT_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_8 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_8BIT | DMAC_DCMD_RDIL_IGN
#define DMA_8BIT_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_8 | \
DMAC_DCMD_DS_8BIT | DMAC_DCMD_RDIL_IGN
#define DMA_16BIT_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_16BIT | DMAC_DCMD_RDIL_IGN
#define DMA_16BIT_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BIT | DMAC_DCMD_RDIL_IGN
#define DMA_32BIT_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_32BIT | DMAC_DCMD_RDIL_IGN
#define DMA_32BIT_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_32BIT | DMAC_DCMD_RDIL_IGN
#define DMA_16BYTE_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_8 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_16BYTE_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_8 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_32BYTE_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_8 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_32BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_32BYTE_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_8 | \
DMAC_DCMD_DS_32BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_32_32BYTE_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_32BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_32_16BYTE_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_32_16BYTE_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_16BIT_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BIT | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_16BIT_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BIT | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_16BYTE_RX_CMD \
DMAC_DCMD_DAI | \
DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_16BYTE_TX_CMD \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
#define DMA_AIC_16BYTE_TX_CMD_UC \
DMAC_DCMD_SAI | \
DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_RDIL_IGN
extern int jz_request_dma(int dev_id,
const char *dev_str,
irqreturn_t (*irqhandler)(int, void *),
unsigned long irqflags,
void *irq_dev_id);
extern void jz_free_dma(unsigned int dmanr);
extern int jz_dma_read_proc(char *buf, char **start, off_t fpos,
int length, int *eof, void *data);
extern void dump_jz_dma_channel(unsigned int dmanr);
extern void enable_dma(unsigned int dmanr);
extern void disable_dma(unsigned int dmanr);
extern void set_dma_addr(unsigned int dmanr, unsigned int phyaddr);
extern void set_dma_count(unsigned int dmanr, unsigned int bytecnt);
extern void set_dma_mode(unsigned int dmanr, unsigned int mode);
extern void jz_set_oss_dma(unsigned int dmanr, unsigned int mode, unsigned int audio_fmt);
extern void jz_set_alsa_dma(unsigned int dmanr, unsigned int mode, unsigned int audio_fmt);
extern void jz_set_dma_src_width(int dmanr, int nbit);
extern void jz_set_dma_dest_width(int dmanr, int nbit);
extern void jz_set_dma_block_size(int dmanr, int nbyte);
extern unsigned int get_dma_residue(unsigned int dmanr);
extern spinlock_t dma_spin_lock;
static __inline__ unsigned long claim_dma_lock(void)
{
unsigned long flags;
spin_lock_irqsave(&dma_spin_lock, flags);
return flags;
}
static __inline__ void release_dma_lock(unsigned long flags)
{
spin_unlock_irqrestore(&dma_spin_lock, flags);
}
/* Clear the 'DMA Pointer Flip Flop'.
* Write 0 for LSB/MSB, 1 for MSB/LSB access.
*/
#define clear_dma_ff(channel)
static __inline__ struct jz_dma_chan *get_dma_chan(unsigned int dmanr)
{
if (dmanr > MAX_DMA_NUM
|| jz_dma_table[dmanr].dev_id < 0)
return NULL;
return &jz_dma_table[dmanr];
}
static __inline__ int dma_halted(unsigned int dmanr)
{
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return 1;
return __dmac_channel_transmit_halt_detected(dmanr) ? 1 : 0;
}
static __inline__ unsigned int get_dma_mode(unsigned int dmanr)
{
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return 0;
return chan->mode;
}
static __inline__ void clear_dma_done(unsigned int dmanr)
{
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return;
REG_DMAC_DCCSR(chan->io) &= ~(DMAC_DCCSR_HLT | DMAC_DCCSR_TT | DMAC_DCCSR_AR);
}
static __inline__ void clear_dma_halt(unsigned int dmanr)
{
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return;
REG_DMAC_DCCSR(chan->io) &= ~(DMAC_DCCSR_HLT);
REG_DMAC_DMACR((chan->io)/HALF_DMA_NUM) &= ~(DMAC_DMACR_HLT);
}
static __inline__ void clear_dma_flag(unsigned int dmanr)
{
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return;
REG_DMAC_DCCSR(chan->io) &= ~(DMAC_DCCSR_HLT | DMAC_DCCSR_TT | DMAC_DCCSR_AR);
REG_DMAC_DMACR((chan->io)/HALF_DMA_NUM) &= ~(DMAC_DMACR_HLT | DMAC_DMACR_AR);
}
static __inline__ void set_dma_page(unsigned int dmanr, char pagenr)
{
}
static __inline__ unsigned int get_dma_done_status(unsigned int dmanr)
{
unsigned long dccsr;
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return 0;
dccsr = REG_DMAC_DCCSR(chan->io);
return dccsr & (DMAC_DCCSR_HLT | DMAC_DCCSR_TT | DMAC_DCCSR_AR);
}
static __inline__ int get_dma_done_irq(unsigned int dmanr)
{
struct jz_dma_chan *chan = get_dma_chan(dmanr);
if (!chan)
return -1;
return chan->irq;
}
#endif /* __ASM_JZ4750_DMA_H__ */
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