202 lines
5.1 KiB
C
202 lines
5.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2005 infineon
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* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
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*
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*/
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#ifndef _IFXMIPS_DMA_H__
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#define _IFXMIPS_DMA_H__
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#define RCV_INT 1
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#define TX_BUF_FULL_INT 2
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#define TRANSMIT_CPT_INT 4
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#define IFXMIPS_DMA_CH_ON 1
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#define IFXMIPS_DMA_CH_OFF 0
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#define IFXMIPS_DMA_CH_DEFAULT_WEIGHT 100
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enum attr_t{
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TX = 0,
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RX = 1,
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RESERVED = 2,
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DEFAULT = 3,
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};
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#define DMA_OWN 1
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#define CPU_OWN 0
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#define DMA_MAJOR 250
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#define DMA_DESC_OWN_CPU 0x0
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#define DMA_DESC_OWN_DMA 0x80000000
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#define DMA_DESC_CPT_SET 0x40000000
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#define DMA_DESC_SOP_SET 0x20000000
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#define DMA_DESC_EOP_SET 0x10000000
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#define MISCFG_MASK 0x40
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#define RDERR_MASK 0x20
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#define CHOFF_MASK 0x10
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#define DESCPT_MASK 0x8
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#define DUR_MASK 0x4
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#define EOP_MASK 0x2
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#define DMA_DROP_MASK (1<<31)
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#define IFXMIPS_DMA_RX -1
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#define IFXMIPS_DMA_TX 1
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typedef struct dma_chan_map {
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char dev_name[15];
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enum attr_t dir;
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int pri;
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int irq;
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int rel_chan_no;
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} _dma_chan_map;
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#ifdef CONFIG_CPU_LITTLE_ENDIAN
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typedef struct rx_desc{
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u32 data_length:16;
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volatile u32 reserved:7;
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volatile u32 byte_offset:2;
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volatile u32 Burst_length_offset:3;
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volatile u32 EoP:1;
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volatile u32 Res:1;
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volatile u32 C:1;
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volatile u32 OWN:1;
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volatile u32 Data_Pointer;
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/*fix me:should be 28 bits here, 32 bits just for host simulatiuon purpose*/
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}_rx_desc;
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typedef struct tx_desc{
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volatile u32 data_length:16;
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volatile u32 reserved1:7;
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volatile u32 byte_offset:5;
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volatile u32 EoP:1;
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volatile u32 SoP:1;
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volatile u32 C:1;
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volatile u32 OWN:1;
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volatile u32 Data_Pointer;//fix me:should be 28 bits here
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}_tx_desc;
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#else //BIG
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typedef struct rx_desc{
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union
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{
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struct
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{
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volatile u32 OWN:1;
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volatile u32 C:1;
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volatile u32 SoP:1;
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volatile u32 EoP:1;
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volatile u32 Burst_length_offset:3;
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volatile u32 byte_offset:2;
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volatile u32 reserve:7;
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volatile u32 data_length:16;
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}field;
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volatile u32 word;
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}status;
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volatile u32 Data_Pointer;
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}_rx_desc;
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typedef struct tx_desc{
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union
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{
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struct
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{
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volatile u32 OWN:1;
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volatile u32 C:1;
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volatile u32 SoP:1;
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volatile u32 EoP:1;
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volatile u32 byte_offset:5;
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volatile u32 reserved:7;
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volatile u32 data_length:16;
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}field;
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volatile u32 word;
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}status;
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volatile u32 Data_Pointer;
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}_tx_desc;
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#endif //ENDIAN
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typedef struct dma_channel_info{
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/*relative channel number*/
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int rel_chan_no;
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/*class for this channel for QoS*/
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int pri;
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/*specify byte_offset*/
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int byte_offset;
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/*direction*/
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int dir;
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/*irq number*/
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int irq;
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/*descriptor parameter*/
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int desc_base;
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int desc_len;
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int curr_desc;
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int prev_desc;/*only used if it is a tx channel*/
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/*weight setting for WFQ algorithm*/
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int weight;
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int default_weight;
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int packet_size;
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int burst_len;
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/*on or off of this channel*/
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int control;
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/**optional information for the upper layer devices*/
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#if defined(CONFIG_IFXMIPS_ETHERNET_D2) || defined(CONFIG_IFXMIPS_PPA)
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void* opt[64];
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#else
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void* opt[25];
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#endif
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/*Pointer to the peripheral device who is using this channel*/
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void* dma_dev;
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/*channel operations*/
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void (*open)(struct dma_channel_info* pCh);
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void (*close)(struct dma_channel_info* pCh);
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void (*reset)(struct dma_channel_info* pCh);
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void (*enable_irq)(struct dma_channel_info* pCh);
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void (*disable_irq)(struct dma_channel_info* pCh);
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}_dma_channel_info;
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typedef struct dma_device_info{
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/*device name of this peripheral*/
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char device_name[15];
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int reserved;
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int tx_burst_len;
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int rx_burst_len;
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int default_weight;
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int current_tx_chan;
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int current_rx_chan;
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int num_tx_chan;
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int num_rx_chan;
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int max_rx_chan_num;
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int max_tx_chan_num;
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_dma_channel_info* tx_chan[20];
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_dma_channel_info* rx_chan[20];
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/*functions, optional*/
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u8* (*buffer_alloc)(int len,int* offset, void** opt);
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void (*buffer_free)(u8* dataptr, void* opt);
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int (*intr_handler)(struct dma_device_info* info, int status);
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void * priv; /* used by peripheral driver only */
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}_dma_device_info;
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_dma_device_info* dma_device_reserve(char* dev_name);
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void dma_device_release(_dma_device_info* dev);
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void dma_device_register(_dma_device_info* info);
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void dma_device_unregister(_dma_device_info* info);
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int dma_device_read(struct dma_device_info* info, u8** dataptr, void** opt);
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int dma_device_write(struct dma_device_info* info, u8* dataptr, int len, void* opt);
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#endif
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