diff options
Diffstat (limited to 'arch/arm/plat-mxc/include/mach/mx2_dma.h')
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/mx2_dma.h | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/mx2_dma.h b/arch/arm/plat-mxc/include/mach/mx2_dma.h new file mode 100644 index 000000000000..8f5ae658f96b --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/mx2_dma.h @@ -0,0 +1,261 @@ +/* + * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __ASM_ARCH_MXC_MX2_H__ +#define __ASM_ARCH_MXC_MX2_H__ + +/*! + * @defgroup DMA_MX27 DMA driver for i.MX27 + */ + +/*! + *@file arch-mxc/mx2_dma.h + *@brief DMA driver header file + * + * @ingroup DMA_MX27 + * + */ + +#include <mach/hardware.h> +#include <asm/dma.h> +#include <stdarg.h> + +#define MXC_DMA_INTR_0 32 + +#define DMA_DCR 0x000 /* 32bit dma control reg */ +#define DMA_DISR 0x004 /* 32bit dma interrupt status reg */ +#define DMA_DIMR 0x008 /* 32bit dma interrupt mask reg */ +#define DMA_DBTOSR 0x00c /* 32bit dma burst timeout stat reg */ +#define DMA_DRTOSR 0x010 /* 32bit dma req timeout status reg */ +#define DMA_DSESR 0x014 /* 32bit dma transfer err status reg */ +#define DMA_DBOSR 0x018 /* 32bit dma buffer overflow stat reg */ +#define DMA_DBTOCR 0x01c /* 32bit dma burst timeout ctrl reg */ + +#define DMA_WSRA 0x040 /* 32bit dma W-size A reg */ +#define DMA_XSRA 0x044 /* 32bit dma X-size A reg */ +#define DMA_YSRA 0x048 /* 32bit dma Y-size A reg */ +#define DMA_WSRB 0x04C /* 32bit dma W-size B reg */ +#define DMA_XSRB 0x050 /* 32bit dma X-size B reg */ +#define DMA_YSRB 0x054 /* 32bit dma Y-size B reg */ + +#define DMA_CH_BASE(x) (0x080+0x040*(x)) + +#define DMA_SAR(x) (DMA_CH_BASE(x)+0x000) +#define DMA_DAR(x) (DMA_CH_BASE(x)+0x004) +#define DMA_CNTR(x) (DMA_CH_BASE(x)+0x008) +#define DMA_CCR(x) (DMA_CH_BASE(x)+0x00C) /* 32bit dma ch0 control reg */ +#define DMA_RSSR(x) (DMA_CH_BASE(x)+0x010) /* 32bit dma ch0 req source sel reg */ +#define DMA_BLR(x) (DMA_CH_BASE(x)+0x014) /* 32bit dma ch0 burst lenght reg */ +#define DMA_RTOR(x) (DMA_CH_BASE(x)+0x018) /* 32bit dma ch0 req time out reg */ +#define DMA_BUCR(x) (DMA_CH_BASE(x)+0x018) /* 32bit dma ch0 bus utilization reg */ +#define DMA_CCNR(x) (DMA_CH_BASE(x)+0x01C) /* 32bit dma ch0 */ + +#define DMA_TCR 0x480 /*32bit dma test control reg */ +#define DMA_TFIFOA 0x484 /* 32bit dma test fifo A reg */ +#define DMA_TDRR 0x488 /* 32bit dma test request reg */ +#define DMA_TDIPR 0x48c /* 32bit dma test in progress reg */ +#define DMA_TFIFOB 0x490 /* 32bit dma test fifo B reg */ + +/*! + * This defines maximum DMA address + */ +#define MAX_DMA_ADDRESS 0xffffffff + +#define MXC_DMA_CHANNELS 16 +#define MAX_DMA_CHANNELS MXC_DMA_CHANNELS + +#define MX_DMA_CHANNELS MXC_DMA_CHANNELS + +/*!@def DMA_MEM_SIZE_8 DMA access port size, 8 bit*/ +/*!@def DMA_MEM_SIZE_16 DMA access port size, 16 bit*/ +/*!@def DMA_MEM_SIZE_32 DMA access port size, 32 bit*/ +#define DMA_MEM_SIZE_8 0x1 +#define DMA_MEM_SIZE_16 0x2 +#define DMA_MEM_SIZE_32 0x0 + +/*!@def DMA_TYPE_LINEAR DMA transfer type, linear*/ +/*!@def DMA_TYPE_2D DMA transfer type, 2D*/ +/*!@def DMA_TYPE_FIFO DMA transfer type, FIFO*/ +/*!@def DMA_TYPE_EBE DMA transfer type, end-of-burst enable FIFO*/ +#define DMA_TYPE_LINEAR 0x0 +#define DMA_TYPE_2D 0x01 +#define DMA_TYPE_FIFO 0x2 +#define DMA_TYPE_EBE 0x3 + +/*!@def DMA_DONE DMA transfer done*/ +/*!@def DMA_BURST_TIMEOUT DMA transfer timeout error*/ +/*!@def DMA_REQUEST_TIMEOUT DMA transfer request timeout error*/ +/*!@def DMA_TRANSFER_ERROR DMA transfer error*/ +/*!@def DMA_BUFFER_OVERFLOW DMA transfer buffer overflow error*/ +#define DMA_DONE 0x1000 +#define DMA_BURST_TIMEOUT 0x1 +#define DMA_REQUEST_TIMEOUT 0x2 +#define DMA_TRANSFER_ERROR 0x4 +#define DMA_BUFFER_OVERFLOW 0x8 + +/*!@brief DMA control register*/ +typedef struct { + volatile u32 CEN:1; /*!< Dma channel enable */ + volatile u32 FRC:1; /*!< Force a dma cycle bit */ + volatile u32 RPT:1; /*!< Repeat bit */ + volatile u32 REN:1; /*!< Request enable bit */ + volatile u32 SSIZ:2; /*!< Source port size, 2 bit in length */ + volatile u32 DSIZ:2; /*!< Dest port size, 2 bit in length */ + volatile u32 MSEL:1; /*!< 2D memory register set bit */ + volatile u32 MDIR:1; /*!< Transfer direction, inversed or normal */ + volatile u32 SMOD:2; /*!< Source mode, 2 bit in length */ + volatile u32 DMOD:2; /*!< Dest mode, 2 bit in length */ + volatile u32 ACRPT:1; /*!< Auto clear repeat bit */ + volatile u32 Reserver:17; /*!< Reserved bits */ + +} dma_regs_control; + +#define DMA_CTL_CEN 0x1 +#define DMA_CTL_FRC 0x2 +#define DMA_CTL_RPT 0x4 +#define DMA_CTL_REN 0x8 + +#define DMA_CTL_MSEL 0x100 +#define DMA_CTL_MDIR 0x200 +#define DMA_CTL_ACRPT 0x4000 + +#define DMA_CTL_GET_SSIZ(x) (((x)>>4)&0x3) +#define DMA_CTL_GET_DSIZ(x) (((x)>>6)&0x3) +#define DMA_CTL_GET_SMOD(x) (((x)>>10)&0x3) +#define DMA_CTL_GET_DMOD(x) (((x)>>12)&0x3) + +#define DMA_CTL_SET_SSIZ(x,value) do{ \ + (x)&=~(0x3<<4); \ + (x)|=(value)<<4; \ + }while(0) + +#define DMA_CTL_SET_DSIZ(x,value) do{ \ + (x)&=~(0x3<<6); \ + (x)|=(value)<<6; \ + }while(0) + +#define DMA_CTL_SET_SMOD(x,value) do{ \ + (x)&=~(0x3<<10); \ + (x)|=(value)<<10; \ + }while(0) + +#define DMA_CTL_SET_DMOD(x,value) do{ \ + (x)&=~(0x3<<12); \ + (x)|=(value)<<12; \ + }while(0) + +typedef struct { + volatile u32 SourceAddr; + volatile u32 DestAddr; + volatile u32 Count; + volatile u32 Ctl; + volatile u32 RequestSource; + volatile u32 BurstLength; + union { + volatile u32 ReqTimeout; + volatile u32 BusUtilt; + }; + volatile u32 transferd; +} dma_regs_t; + +#ifndef TRANSFER_32BIT +/*! + * This defines DMA access data size + */ + +#define TRANSFER_8BIT DMA_MEM_SIZE_8 +#define TRANSFER_16BIT DMA_MEM_SIZE_16 +#define TRANSFER_32BIT DMA_MEM_SIZE_32 + +#endif + +/*! + * This defines maximum device name length passed during mxc_request_dma(). + */ +#define MAX_DEVNAME_LENGTH 32 +#define MAX_BD_SIZE 32 + +/*! + * Structure containing dma channel parameters. + */ +typedef struct { + unsigned long dma_chan; /*!< the dma channel information: dynamic or channel number */ + u32 mode:1; /*!< the initialized dma mode, 0 for dma read, 1 for dma write */ + u32 rto_en:1; /*!< enable request-timeout. It is valid when REN=1 */ + u32 dir:1; /*!< Transfer direction, 0 for increment, 1 for decrement */ + u32 dma_chaining:1; /*!< Autoclear bit for chainbuffer */ + u32 ren:1; /*!< enable transfer based request signal */ + u32 M2D_Valid:1; /*!< enable 2D address module. 0 for disable it. 1 for enabled it */ + u32 msel:1; /*!<2D memory selection, 0 for set A, 1 for set B */ + u32 burstLength; /*!< Channel burst length */ + u32 request; /*!< Request source. */ + u32 busuntils; /*!< when REN=0, Bus utilization, otherwise it it request timeout */ + u32 sourceType; /*!< Source type, see DMA_TYPE_* */ + u32 sourcePort; /*!< Source port size, see DMA_MEM_SIZE_* */ + u32 destType; /*!< Destination type, see DMA_TYPE_* */ + u32 destPort; /*!< Destination port size, see DMA_MEM_SIZE_* */ + __u32 per_address; /*< Peripheral source/destination + * physical address + */ + u32 W; /*!< 2D Wide-size */ + u32 X; /*!< 2D X-size */ + u32 Y; /*!< 2D Y-size */ +} mx2_dma_info_t; + +/*! + * Structure of dma buffer descriptor + */ +typedef struct { + unsigned long state; /*!< dma bd state */ + int mode; /*!< the dma mode of this bd */ + unsigned long count; /*!< the length of the dma transfer */ + unsigned long src_addr; /*!< the source address of the dma transfer */ + unsigned long dst_addr; /*!< the destination address of the dma transfer */ +} mx2_dma_bd_t; + +/*! + * the states of dma buffer descriptor + */ +#define DMA_BD_ST_BUSY 0x20000000 /*!< dma bd is transfering or has be configured into controller */ +#define DMA_BD_ST_PEND 0x10000000 /*!< dma bd is waiting to be configured into controller */ +#define DMA_BD_ST_LAST 0x08000000 /*!< dma bd is the last dma bd which is built in one dma transfer request + * When completed this bd, the callback function must be called. + */ + +/*! + * This structure containing the private information for MX2 + */ +typedef struct mx2_dma_priv_s { + unsigned int dma_chaining:1; /* 1: using headware dma chaining feature */ + unsigned int ren:1; /* 1: dma start besed on request signal */ + unsigned long trans_bytes; /* To store the transfered data bytes in this transfer */ + mx2_dma_info_t *dma_info; /* To store the pointer for dma parameter for reading and wirting */ + int bd_rd; /* the read index of bd ring */ + int bd_wr; /* the write index of bd ring */ + atomic_t bd_used; /* the valid bd number in bd ring */ + mx2_dma_bd_t *bd_ring; /* the pointer of bd ring */ + unsigned long dma_base; /* register base address of this channel */ + int dma_irq; /* irq number of this channel */ +} mx2_dma_priv_t; + +/*! + * @brief get the dma info by channel_id + */ +extern mx2_dma_info_t *mxc_dma_get_info(mxc_dma_device_t channel_id); + +/*! + * @brief: scan dma parameter list . And collect information about which channels are dynamic . + */ +extern void mxc_dma_load_info(mxc_dma_channel_t * dma); + +#endif |