target/linux/amazon-2.6/files/include/asm-mips/amazon/amazon_dma.h

   1 #ifndef AMAZON_DMA_H
   2 #define AMAZON_DMA_H
   3
   4 #define RCV_INT          1
   5 #define TX_BUF_FULL_INT  2
   6 #define TRANSMIT_CPT_INT 4
   7
   8 #define QOS_DEFAULT_WGT 0x7fffffffUL;
   9
  10
  11 enum attr_t{
  12    TX=0,
  13    RX=1,
  14    RESERVED=2,
  15    DEFAULT=3,
  16
  17 };
  18
  19 #ifdef CONFIG_CPU_LITTLE_ENDIAN
  20 typedef struct rx_desc{
  21    u32 data_length:16;
  22    volatile u32 reserved:7;
  23    volatile u32 byte_offset:2;
  24    volatile u32 Burst_length_offset:3;
  25    volatile u32 EoP:1;
  26    volatile u32 Res:1;
  27    volatile u32 C:1;
  28    volatile u32 OWN:1;
  29    volatile u32 Data_Pointer;
  30    /*fix me:should be 28 bits here, 32 bits just for host simulatiuon purpose*/
  31 }_rx_desc;
  32
  33
  34 typedef struct tx_desc{
  35    volatile u32 data_length:16;
  36    volatile u32 reserved1:7;
  37    volatile u32 byte_offset:5;
  38    volatile u32 EoP:1;
  39    volatile u32 SoP:1;
  40    volatile u32 C:1;
  41    volatile u32 OWN:1;
  42    volatile u32 Data_Pointer;//fix me:should be 28 bits here
  43 }_tx_desc;
  44 #else //BIG
  45 typedef struct rx_desc{
  46         union
  47         {
  48                 struct
  49                 {
  50                         volatile u32 OWN                        :1;
  51                         volatile u32 C                          :1;
  52                         volatile u32 SoP                        :1;
  53                         volatile u32 EoP                        :1;
  54                         volatile u32 Burst_length_offset        :3;
  55                         volatile u32 byte_offset                :2;
  56                         volatile u32 reserve                    :7;
  57                         volatile u32 data_length                :16;
  58                 }field;
  59
  60                 volatile u32 word;
  61         }status;
  62
  63         volatile u32 Data_Pointer;
  64 }_rx_desc;
  65
  66
  67 typedef struct tx_desc{
  68         union
  69         {
  70                 struct
  71                 {
  72                         volatile u32 OWN                 :1;
  73                         volatile u32 C                   :1;
  74                         volatile u32 SoP                 :1;
  75                         volatile u32 EoP                 :1;
  76                         volatile u32 byte_offset         :5;
  77                         volatile u32 reserved            :7;
  78                         volatile u32 data_length         :16;
  79                 }field;
  80
  81                 volatile u32 word;
  82         }status;
  83
  84         volatile u32 Data_Pointer;
  85 }_tx_desc;
  86
  87 #endif //ENDIAN
  88
  89 struct dma_channel_info{
  90   /*filled by driver, optional*/
  91     enum attr_t attr;/*TX or RX*/
  92     int weight;
  93     int desc_num;
  94     int packet_size;
  95     int control;/*on or off*/
  96
  97     int desc_base;
  98     int status;
  99 };
 100
 101 typedef struct dma_channel_info _dma_channel_info;
 102
 103 struct dma_device_info{
 104    /*variables*/
 105    /*filled by driver, compulsary*/
 106     char device_name[15];
 107     enum attr_t attr;/*default or else*/
 108     int tx_burst_len;
 109     int rx_burst_len;
 110
 111     int logic_rx_chan_base;
 112     int logic_tx_chan_base;
 113     u8 on_ch_bit;
 114    /*filled by driver, optional*/
 115     int  weight;
 116     int  current_tx_chan;
 117     int  current_rx_chan;
 118     int  num_tx_chan;
 119     int  num_rx_chan;
 120     struct dma_channel_info tx_chan[2];
 121     struct dma_channel_info rx_chan[4];
 122
 123     /*functions, optional*/
 124     u8* (*buffer_alloc)(int len,int* offset, void** opt);
 125     int (*buffer_free)(u8* dataptr, void* opt);
 126     int (*intr_handler)(struct dma_device_info* info, int status);
 127     /*set by device, clear by dma*/
 128     int ack;
 129     void * priv;                /* used by peripheral driver only */
 130 };
 131 typedef struct dma_device_info _dma_device_info;
 132
 133 int dma_device_register(struct dma_device_info* info);
 134
 135 int dma_device_unregister(struct dma_device_info* info);
 136
 137 int dma_device_read(struct dma_device_info* info, u8** dataptr, void** opt);
 138
 139 int dma_device_write(struct dma_device_info* info, u8* dataptr, int len, void* opt);
 140
 141 int dma_device_update(struct dma_device_info* info);
 142
 143 void dma_device_update_rx(struct dma_device_info* dma_dev);
 144
 145 void dma_device_update_tx(struct dma_device_info* dma_dev);
 146
 147 void register_handler_sim(int (*handler)(int));
 148 #endif /* AMAZON_DMA_H */