arch/arm/mach-moxart/include/mach/apb_dma.h

   1 /* Copyright (C) 2013 Jonas Jensen <jonas.jensen@gmail.com>
   2  * This program is free software; you can redistribute it and/or modify it
   3  * under the terms of the GNU General Public License as published by the
   4  * Free Software Foundation; either version 2 of the License,
   5  * or (at your option) any later version. */
   6
   7 #ifndef __MACH_APB_DMA_H
   8 #define __MACH_APB_DMA_H
   9
  10 #define MAX_DMA_ADDRESS                 0xffffffff
  11 #define MAX_DMA_CHANNELS                0
  12
  13 #define APB_DMA_MAX_CHANNEL             4
  14 #define AHB_DMA_MAX_CHANNEL             8
  15 #define TOTAL_DMA_MAX_CHANNEL   (APB_DMA_MAX_CHANNEL + AHB_DMA_MAX_CHANNEL)
  16
  17 /* following define for APB DMA register struct */
  18 union _command {
  19         unsigned int ul;
  20 #define APB_DMA_ENABLE                          (1<<0)
  21 #define APB_DMA_FIN_INT_STS                     (1<<1)
  22 #define APB_DMA_FIN_INT_EN                      (1<<2)
  23 #define APB_DMA_BURST_MODE                      (1<<3)
  24 #define APB_DMA_ERR_INT_STS                     (1<<4)
  25 #define APB_DMA_ERR_INT_EN                      (1<<5)
  26 #define APB_DMA_SOURCE_AHB                      (1<<6)
  27 #define APB_DMA_SOURCE_APB                      0
  28 #define APB_DMA_DEST_AHB                        (1<<7)
  29 #define APB_DMA_DEST_APB                        0
  30 #define APB_DMA_SOURCE_INC_0            0
  31 #define APB_DMA_SOURCE_INC_1_4          (1<<8)
  32 #define APB_DMA_SOURCE_INC_2_8          (2<<8)
  33 #define APB_DMA_SOURCE_INC_4_16         (3<<8)
  34 #define APB_DMA_SOURCE_DEC_1_4          (5<<8)
  35 #define APB_DMA_SOURCE_DEC_2_8          (6<<8)
  36 #define APB_DMA_SOURCE_DEC_4_16         (7<<8)
  37 #define APB_DMA_SOURCE_INC_MASK         (7<<8)
  38 #define APB_DMA_DEST_INC_0                      0
  39 #define APB_DMA_DEST_INC_1_4            (1<<12)
  40 #define APB_DMA_DEST_INC_2_8            (2<<12)
  41 #define APB_DMA_DEST_INC_4_16           (3<<12)
  42 #define APB_DMA_DEST_DEC_1_4            (5<<12)
  43 #define APB_DMA_DEST_DEC_2_8            (6<<12)
  44 #define APB_DMA_DEST_DEC_4_16           (7<<12)
  45 #define APB_DMA_DEST_INC_MASK           (7<<12)
  46 #define APB_DMA_DEST_REQ_NO_MASK        (15<<16)
  47 #define APB_DMA_DATA_WIDTH_MASK         (3<<20)
  48 #define APB_DMA_DATA_WIDTH_4            0
  49 #define APB_DMA_DATA_WIDTH_2            (1<<20)
  50 #define APB_DMA_DATA_WIDTH_1            (2<<20)
  51 #define APB_DMA_SOURCE_REQ_NO_MASK      (15<<24)
  52         struct _bits {
  53                 unsigned int enable:1;          /* enable DMA */
  54 #define APB_DMAB_ENABLE                         1
  55                 unsigned int fin_int_sts:1;     /* finished interrupt status */
  56 #define APB_DMAB_FIN_INT_STS            1
  57                 unsigned int fin_int_en:1;      /* finished interrupt enable */
  58 #define APB_DMAB_FIN_INT_EN                     1
  59                 unsigned int burst:1;           /* burst mode */
  60 #define APB_DMAB_BURST_MODE                     1
  61                 unsigned int err_int_sts:1;     /* error interrupt status */
  62 #define APB_DMAB_ERR_INT_STS            1
  63                 unsigned int err_int_en:1;      /* error interrupt enable */
  64 #define APB_DMAB_ERR_INT_EN                     1
  65                 unsigned int source_sel:1;      /* 0:APB (device),1:AHB (RAM) */
  66 #define APB_DMAB_SOURCE_AHB                     1
  67 #define APB_DMAB_SOURCE_APB                     0
  68                 unsigned int dest_sel:1;        /* 0:APB,1:AHB */
  69 #define APB_DMAB_DEST_AHB                       1
  70 #define APB_DMAB_DEST_APB                       0
  71                 unsigned int source_inc:3;
  72                                         /* 000:no increment
  73                                            001:+1(busrt=0),+4 (burst=1)
  74                                            010:+2(burst=0),+8 (burst=1)
  75                                            011:+4(burst=0),+16(burst=1)
  76                                            101:-1(burst=0),-4 (burst=1)
  77                                            110:-2(burst=0),-8 (burst=1)
  78                                            111:-4(burst=0),-16(burst=1) */
  79 #define APB_DMAB_SOURCE_INC_0           0
  80 #define APB_DMAB_SOURCE_INC_1_4         1
  81 #define APB_DMAB_SOURCE_INC_2_8         2
  82 #define APB_DMAB_SOURCE_INC_4_16        3
  83 #define APB_DMAB_SOURCE_DEC_1_4         5
  84 #define APB_DMAB_SOURCE_DEC_2_8         6
  85 #define APB_DMAB_SOURCE_DEC_4_16        7
  86 #define APB_DMAB_SOURCE_INC_MASK        7
  87                 unsigned int reserved1:1;
  88                 unsigned int dest_inc:3;
  89                                         /* 000:no increment
  90                                            001:+1(busrt=0),+4 (burst=1)
  91                                            010:+2(burst=0),+8 (burst=1)
  92                                            011:+4(burst=0),+16(burst=1)
  93                                            101:-1(burst=0),-4 (burst=1)
  94                                            110:-2(burst=0),-8 (burst=1)
  95                                            111:-4(burst=0),-16(burst=1) */
  96 #define APB_DMAB_DEST_INC_0                     0
  97 #define APB_DMAB_DEST_INC_1_4           1
  98 #define APB_DMAB_DEST_INC_2_8           2
  99 #define APB_DMAB_DEST_INC_4_16          3
 100 #define APB_DMAB_DEST_DEC_1_4           5
 101 #define APB_DMAB_DEST_DEC_2_8           6
 102 #define APB_DMAB_DEST_DEC_4_16          7
 103 #define APB_DMAB_DEST_INC_MASK          7
 104                 unsigned int reserved2:1;
 105                 unsigned int dest_req_no:4;
 106                                         /* request signal select of dest */
 107                                         /* addr for DMA hwd handshake
 108                                            0:no request/grant signal
 109                                            1-15:request/grant signal */
 110 #define APB_DMAB_DEST_REQ_NO_MASK       15
 111                 unsigned int data_width:2;      /* data width of transfer */
 112                                         /* 00:word, 01:half, 10:byte */
 113 #define APB_DMAB_DATA_WIDTH_MASK        3
 114 #define APB_DMAB_DATA_WIDTH_4           0
 115 #define APB_DMAB_DATA_WIDTH_2           1
 116 #define APB_DMAB_DATA_WIDTH_1           2
 117                 unsigned int reserved3:2;
 118                 unsigned int source_req_no:4;
 119                                         /* request signal select of dest */
 120                                         /* addr for DMA hwd handshake
 121                                            0:no request/grant signal
 122                                            1-15:request/grant signal */
 123 #define APB_DMAB_SOURCE_REQ_NO_MASK     15
 124                 unsigned int reserved4:4;
 125         } bits;
 126 };
 127
 128 struct apb_dma_reg {
 129         unsigned int source_addr;
 130         unsigned int dest_addr;
 131         unsigned int cycles;    /* is depended on burst mode */
 132 #define APB_DMA_CYCLES_MASK     0x00ffffff
 133         union _command command;
 134 };
 135
 136 #define APB_DMA_SPI_TX_REQ_NO           1
 137 #define APB_DMA_SPI_RX_REQ_NO           2
 138 #define APB_DMA_SD_REQ_NO                       5
 139 #define APB_DMA_AC97_TX_REQ_NO          6
 140 #define APB_DMA_AC97_RX_REQ_NO          7
 141 #define APB_DMA_USB_DEVICE_REQ_NO       9
 142
 143 /* following APB DMA private data struct define */
 144 struct apb_dma_priv {
 145         struct apb_dma_reg *reg;
 146         void (*irq_handler)(void *param);
 147         void *irq_handler_param;
 148         int used_flag;
 149         int error_flag;
 150         int req_no;
 151 };
 152
 153 struct apb_dma_conf_param {
 154         unsigned int source_addr;       /* need physical address */
 155         unsigned int dest_addr; /* need physical address */
 156         unsigned int size;                      /* total bytes number */
 157         int data_width;
 158         int dest_inc;
 159         int source_inc;
 160         int dest_sel;                   /* APB or AHB */
 161         int source_sel;                 /* APB or AHB */
 162         int burst_mode;
 163 };
 164
 165 #ifndef __ASSEMBLY__
 166
 167 /* following APB DMA function call phototype define */
 168 extern struct apb_dma_priv *apb_dma_alloc(int req_no);
 169 extern void apb_dma_release(struct apb_dma_priv *priv);
 170 extern void apb_dma_set_irq(struct apb_dma_priv *priv,
 171         void (*func)(void *param), void *param);
 172 extern void apb_dma_release_irq(struct apb_dma_priv *priv);
 173 extern void apb_dma_conf(struct apb_dma_priv *priv,
 174         struct apb_dma_conf_param *param);
 175 extern void apb_dma_enable(struct apb_dma_priv *priv);
 176 extern void apb_dma_disable(struct apb_dma_priv *priv);
 177
 178 #endif
 179
 180 #endif  /* __MACH_APB_DMA_H */