arch/blackfin/include/asm/bfin_sport.h

   1 /*
   2  * bfin_sport.h - interface to Blackfin SPORTs
   3  *
   4  * Copyright 2004-2009 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef __BFIN_SPORT_H__
  10 #define __BFIN_SPORT_H__
  11
  12 /* Sport mode: it can be set to TDM, i2s or others */
  13 #define NORM_MODE       0x0
  14 #define TDM_MODE        0x1
  15 #define I2S_MODE        0x2
  16
  17 /* Data format, normal, a-law or u-law */
  18 #define NORM_FORMAT     0x0
  19 #define ALAW_FORMAT     0x2
  20 #define ULAW_FORMAT     0x3
  21
  22 /* Function driver which use sport must initialize the structure */
  23 struct sport_config {
  24         /* TDM (multichannels), I2S or other mode */
  25         unsigned int mode:3;
  26
  27         /* if TDM mode is selected, channels must be set */
  28         int channels;   /* Must be in 8 units */
  29         unsigned int frame_delay:4;     /* Delay between frame sync pulse and first bit */
  30
  31         /* I2S mode */
  32         unsigned int right_first:1;     /* Right stereo channel first */
  33
  34         /* In mormal mode, the following item need to be set */
  35         unsigned int lsb_first:1;       /* order of transmit or receive data */
  36         unsigned int fsync:1;   /* Frame sync required */
  37         unsigned int data_indep:1;      /* data independent frame sync generated */
  38         unsigned int act_low:1; /* Active low TFS */
  39         unsigned int late_fsync:1;      /* Late frame sync */
  40         unsigned int tckfe:1;
  41         unsigned int sec_en:1;  /* Secondary side enabled */
  42
  43         /* Choose clock source */
  44         unsigned int int_clk:1; /* Internal or external clock */
  45
  46         /* If external clock is used, the following fields are ignored */
  47         int serial_clk;
  48         int fsync_clk;
  49
  50         unsigned int data_format:2;     /* Normal, u-law or a-law */
  51
  52         int word_len;           /* How length of the word in bits, 3-32 bits */
  53         int dma_enabled;
  54 };
  55
  56 /* Userspace interface */
  57 #define SPORT_IOC_MAGIC         'P'
  58 #define SPORT_IOC_CONFIG        _IOWR('P', 0x01, struct sport_config)
  59
  60 #ifdef __KERNEL__
  61
  62 #include <linux/types.h>
  63
  64 /*
  65  * All Blackfin system MMRs are padded to 32bits even if the register
  66  * itself is only 16bits.  So use a helper macro to streamline this.
  67  */
  68 #define __BFP(m) u16 m; u16 __pad_##m
  69 struct sport_register {
  70         __BFP(tcr1);
  71         __BFP(tcr2);
  72         __BFP(tclkdiv);
  73         __BFP(tfsdiv);
  74         union {
  75                 u32 tx32;
  76                 u16 tx16;
  77         };
  78         u32 __pad_tx;
  79         union {
  80                 u32 rx32;       /* use the anomaly wrapper below */
  81                 u16 rx16;
  82         };
  83         u32 __pad_rx;
  84         __BFP(rcr1);
  85         __BFP(rcr2);
  86         __BFP(rclkdiv);
  87         __BFP(rfsdiv);
  88         __BFP(stat);
  89         __BFP(chnl);
  90         __BFP(mcmc1);
  91         __BFP(mcmc2);
  92         u32 mtcs0;
  93         u32 mtcs1;
  94         u32 mtcs2;
  95         u32 mtcs3;
  96         u32 mrcs0;
  97         u32 mrcs1;
  98         u32 mrcs2;
  99         u32 mrcs3;
 100 };
 101 #undef __BFP
 102
 103 #define bfin_read_sport_rx32(base) \
 104 ({ \
 105         struct sport_register *__mmrs = (void *)base; \
 106         u32 __ret; \
 107         unsigned long flags; \
 108         if (ANOMALY_05000473) \
 109                 local_irq_save(flags); \
 110         __ret = __mmrs->rx32; \
 111         if (ANOMALY_05000473) \
 112                 local_irq_restore(flags); \
 113         __ret; \
 114 })
 115
 116 #endif
 117
 118 /* SPORT_TCR1 Masks */
 119 #define TSPEN           0x0001  /* TX enable */
 120 #define ITCLK           0x0002  /* Internal TX Clock Select */
 121 #define TDTYPE          0x000C  /* TX Data Formatting Select */
 122 #define DTYPE_NORM      0x0000  /* Data Format Normal */
 123 #define DTYPE_ULAW      0x0008  /* Compand Using u-Law */
 124 #define DTYPE_ALAW      0x000C  /* Compand Using A-Law */
 125 #define TLSBIT          0x0010  /* TX Bit Order */
 126 #define ITFS            0x0200  /* Internal TX Frame Sync Select */
 127 #define TFSR            0x0400  /* TX Frame Sync Required Select */
 128 #define DITFS           0x0800  /* Data Independent TX Frame Sync Select */
 129 #define LTFS            0x1000  /* Low TX Frame Sync Select */
 130 #define LATFS           0x2000  /* Late TX Frame Sync Select */
 131 #define TCKFE           0x4000  /* TX Clock Falling Edge Select */
 132
 133 /* SPORT_TCR2 Masks */
 134 #define SLEN            0x001F  /* SPORT TX Word Length (2 - 31) */
 135 #define DP_SLEN(x)      BFIN_DEPOSIT(SLEN, x)
 136 #define EX_SLEN(x)      BFIN_EXTRACT(SLEN, x)
 137 #define TXSE            0x0100  /* TX Secondary Enable */
 138 #define TSFSE           0x0200  /* TX Stereo Frame Sync Enable */
 139 #define TRFST           0x0400  /* TX Right-First Data Order */
 140
 141 /* SPORT_RCR1 Masks */
 142 #define RSPEN           0x0001  /* RX enable */
 143 #define IRCLK           0x0002  /* Internal RX Clock Select */
 144 #define RDTYPE          0x000C  /* RX Data Formatting Select */
 145 /* DTYPE_* defined above */
 146 #define RLSBIT          0x0010  /* RX Bit Order */
 147 #define IRFS            0x0200  /* Internal RX Frame Sync Select */
 148 #define RFSR            0x0400  /* RX Frame Sync Required Select */
 149 #define LRFS            0x1000  /* Low RX Frame Sync Select */
 150 #define LARFS           0x2000  /* Late RX Frame Sync Select */
 151 #define RCKFE           0x4000  /* RX Clock Falling Edge Select */
 152
 153 /* SPORT_RCR2 Masks */
 154 /* SLEN defined above */
 155 #define RXSE            0x0100  /* RX Secondary Enable */
 156 #define RSFSE           0x0200  /* RX Stereo Frame Sync Enable */
 157 #define RRFST           0x0400  /* Right-First Data Order */
 158
 159 /* SPORT_STAT Masks */
 160 #define RXNE            0x0001  /* RX FIFO Not Empty Status */
 161 #define RUVF            0x0002  /* RX Underflow Status */
 162 #define ROVF            0x0004  /* RX Overflow Status */
 163 #define TXF             0x0008  /* TX FIFO Full Status */
 164 #define TUVF            0x0010  /* TX Underflow Status */
 165 #define TOVF            0x0020  /* TX Overflow Status */
 166 #define TXHRE           0x0040  /* TX Hold Register Empty */
 167
 168 /* SPORT_MCMC1 Masks */
 169 #define SP_WOFF         0x03FF  /* Multichannel Window Offset Field */
 170 #define DP_SP_WOFF(x)   BFIN_DEPOSIT(SP_WOFF, x)
 171 #define EX_SP_WOFF(x)   BFIN_EXTRACT(SP_WOFF, x)
 172 #define SP_WSIZE        0xF000  /* Multichannel Window Size Field */
 173 #define DP_SP_WSIZE(x)  BFIN_DEPOSIT(SP_WSIZE, x)
 174 #define EX_SP_WSIZE(x)  BFIN_EXTRACT(SP_WSIZE, x)
 175
 176 /* SPORT_MCMC2 Masks */
 177 #define MCCRM           0x0003  /* Multichannel Clock Recovery Mode */
 178 #define REC_BYPASS      0x0000  /* Bypass Mode (No Clock Recovery) */
 179 #define REC_2FROM4      0x0002  /* Recover 2 MHz Clock from 4 MHz Clock */
 180 #define REC_8FROM16     0x0003  /* Recover 8 MHz Clock from 16 MHz Clock */
 181 #define MCDTXPE         0x0004  /* Multichannel DMA Transmit Packing */
 182 #define MCDRXPE         0x0008  /* Multichannel DMA Receive Packing */
 183 #define MCMEN           0x0010  /* Multichannel Frame Mode Enable */
 184 #define FSDR            0x0080  /* Multichannel Frame Sync to Data Relationship */
 185 #define MFD             0xF000  /* Multichannel Frame Delay */
 186 #define DP_MFD(x)       BFIN_DEPOSIT(MFD, x)
 187 #define EX_MFD(x)       BFIN_EXTRACT(MFD, x)
 188
 189 #endif