release/src/include/sbhnddma.h

   1 /*
   2  * Generic Broadcom Home Networking Division (HND) DMA engine HW interface
   3  * This supports the following chips: BCM42xx, 44xx, 47xx .
   4  *
   5  * Copyright 2007, Broadcom Corporation
   6  * All Rights Reserved.
   7  *
   8  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   9  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  10  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  11  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  12  *
  13  * $Id$
  14  */
  15
  16 #ifndef _sbhnddma_h_
  17 #define _sbhnddma_h_
  18
  19 /* DMA structure:
  20  *  support two DMA engines: 32 bits address or 64 bit addressing
  21  *  basic DMA register set is per channel(transmit or receive)
  22  *  a pair of channels is defined for convenience
  23  */
  24
  25
  26 /* 32 bits addressing */
  27
  28 /* dma registers per channel(xmt or rcv) */
  29 typedef volatile struct {
  30         uint32  control;                /* enable, et al */
  31         uint32  addr;                   /* descriptor ring base address (4K aligned) */
  32         uint32  ptr;                    /* last descriptor posted to chip */
  33         uint32  status;                 /* current active descriptor, et al */
  34 } dma32regs_t;
  35
  36 typedef volatile struct {
  37         dma32regs_t     xmt;            /* dma tx channel */
  38         dma32regs_t     rcv;            /* dma rx channel */
  39 } dma32regp_t;
  40
  41 typedef volatile struct {       /* diag access */
  42         uint32  fifoaddr;               /* diag address */
  43         uint32  fifodatalow;            /* low 32bits of data */
  44         uint32  fifodatahigh;           /* high 32bits of data */
  45         uint32  pad;                    /* reserved */
  46 } dma32diag_t;
  47
  48 /*
  49  * DMA Descriptor
  50  * Descriptors are only read by the hardware, never written back.
  51  */
  52 typedef volatile struct {
  53         uint32  ctrl;           /* misc control bits & bufcount */
  54         uint32  addr;           /* data buffer address */
  55 } dma32dd_t;
  56
  57 /*
  58  * Each descriptor ring must be 4096byte aligned, and fit within a single 4096byte page.
  59  */
  60 #define D32MAXRINGSZ    4096
  61 #define D32RINGALIGN    4096
  62 #define D32MAXDD        (D32MAXRINGSZ / sizeof (dma32dd_t))
  63
  64 /* transmit channel control */
  65 #define XC_XE           ((uint32)1 << 0)        /* transmit enable */
  66 #define XC_SE           ((uint32)1 << 1)        /* transmit suspend request */
  67 #define XC_LE           ((uint32)1 << 2)        /* loopback enable */
  68 #define XC_FL           ((uint32)1 << 4)        /* flush request */
  69 #define XC_AE           ((uint32)3 << 16)       /* address extension bits */
  70 #define XC_AE_SHIFT     16
  71
  72 /* transmit descriptor table pointer */
  73 #define XP_LD_MASK      0xfff                   /* last valid descriptor */
  74
  75 /* transmit channel status */
  76 #define XS_CD_MASK      0x0fff                  /* current descriptor pointer */
  77 #define XS_XS_MASK      0xf000                  /* transmit state */
  78 #define XS_XS_SHIFT     12
  79 #define XS_XS_DISABLED  0x0000                  /* disabled */
  80 #define XS_XS_ACTIVE    0x1000                  /* active */
  81 #define XS_XS_IDLE      0x2000                  /* idle wait */
  82 #define XS_XS_STOPPED   0x3000                  /* stopped */
  83 #define XS_XS_SUSP      0x4000                  /* suspend pending */
  84 #define XS_XE_MASK      0xf0000                 /* transmit errors */
  85 #define XS_XE_SHIFT     16
  86 #define XS_XE_NOERR     0x00000                 /* no error */
  87 #define XS_XE_DPE       0x10000                 /* descriptor protocol error */
  88 #define XS_XE_DFU       0x20000                 /* data fifo underrun */
  89 #define XS_XE_BEBR      0x30000                 /* bus error on buffer read */
  90 #define XS_XE_BEDA      0x40000                 /* bus error on descriptor access */
  91 #define XS_AD_MASK      0xfff00000              /* active descriptor */
  92 #define XS_AD_SHIFT     20
  93
  94 /* receive channel control */
  95 #define RC_RE           ((uint32)1 << 0)        /* receive enable */
  96 #define RC_RO_MASK      0xfe                    /* receive frame offset */
  97 #define RC_RO_SHIFT     1
  98 #define RC_FM           ((uint32)1 << 8)        /* direct fifo receive (pio) mode */
  99 #define RC_AE           ((uint32)3 << 16)       /* address extension bits */
 100 #define RC_AE_SHIFT     16
 101
 102 /* receive descriptor table pointer */
 103 #define RP_LD_MASK      0xfff                   /* last valid descriptor */
 104
 105 /* receive channel status */
 106 #define RS_CD_MASK      0x0fff                  /* current descriptor pointer */
 107 #define RS_RS_MASK      0xf000                  /* receive state */
 108 #define RS_RS_SHIFT     12
 109 #define RS_RS_DISABLED  0x0000                  /* disabled */
 110 #define RS_RS_ACTIVE    0x1000                  /* active */
 111 #define RS_RS_IDLE      0x2000                  /* idle wait */
 112 #define RS_RS_STOPPED   0x3000                  /* reserved */
 113 #define RS_RE_MASK      0xf0000                 /* receive errors */
 114 #define RS_RE_SHIFT     16
 115 #define RS_RE_NOERR     0x00000                 /* no error */
 116 #define RS_RE_DPE       0x10000                 /* descriptor protocol error */
 117 #define RS_RE_DFO       0x20000                 /* data fifo overflow */
 118 #define RS_RE_BEBW      0x30000                 /* bus error on buffer write */
 119 #define RS_RE_BEDA      0x40000                 /* bus error on descriptor access */
 120 #define RS_AD_MASK      0xfff00000              /* active descriptor */
 121 #define RS_AD_SHIFT     20
 122
 123 /* fifoaddr */
 124 #define FA_OFF_MASK     0xffff                  /* offset */
 125 #define FA_SEL_MASK     0xf0000                 /* select */
 126 #define FA_SEL_SHIFT    16
 127 #define FA_SEL_XDD      0x00000                 /* transmit dma data */
 128 #define FA_SEL_XDP      0x10000                 /* transmit dma pointers */
 129 #define FA_SEL_RDD      0x40000                 /* receive dma data */
 130 #define FA_SEL_RDP      0x50000                 /* receive dma pointers */
 131 #define FA_SEL_XFD      0x80000                 /* transmit fifo data */
 132 #define FA_SEL_XFP      0x90000                 /* transmit fifo pointers */
 133 #define FA_SEL_RFD      0xc0000                 /* receive fifo data */
 134 #define FA_SEL_RFP      0xd0000                 /* receive fifo pointers */
 135 #define FA_SEL_RSD      0xe0000                 /* receive frame status data */
 136 #define FA_SEL_RSP      0xf0000                 /* receive frame status pointers */
 137
 138 /* descriptor control flags */
 139 #define CTRL_BC_MASK    0x1fff                  /* buffer byte count */
 140 #define CTRL_AE         ((uint32)3 << 16)       /* address extension bits */
 141 #define CTRL_AE_SHIFT   16
 142 #define CTRL_EOT        ((uint32)1 << 28)       /* end of descriptor table */
 143 #define CTRL_IOC        ((uint32)1 << 29)       /* interrupt on completion */
 144 #define CTRL_EOF        ((uint32)1 << 30)       /* end of frame */
 145 #define CTRL_SOF        ((uint32)1 << 31)       /* start of frame */
 146
 147 /* control flags in the range [27:20] are core-specific and not defined here */
 148 #define CTRL_CORE_MASK  0x0ff00000
 149
 150 /* 64 bits addressing */
 151
 152 /* dma registers per channel(xmt or rcv) */
 153 typedef volatile struct {
 154         uint32  control;                /* enable, et al */
 155         uint32  ptr;                    /* last descriptor posted to chip */
 156         uint32  addrlow;                /* descriptor ring base address low 32-bits (8K aligned) */
 157         uint32  addrhigh;               /* descriptor ring base address bits 63:32 (8K aligned) */
 158         uint32  status0;                /* current descriptor, xmt state */
 159         uint32  status1;                /* active descriptor, xmt error */
 160 } dma64regs_t;
 161
 162 typedef volatile struct {
 163         dma64regs_t     tx;             /* dma64 tx channel */
 164         dma64regs_t     rx;             /* dma64 rx channel */
 165 } dma64regp_t;
 166
 167 typedef volatile struct {               /* diag access */
 168         uint32  fifoaddr;               /* diag address */
 169         uint32  fifodatalow;            /* low 32bits of data */
 170         uint32  fifodatahigh;           /* high 32bits of data */
 171         uint32  pad;                    /* reserved */
 172 } dma64diag_t;
 173
 174 /*
 175  * DMA Descriptor
 176  * Descriptors are only read by the hardware, never written back.
 177  */
 178 typedef volatile struct {
 179         uint32  ctrl1;          /* misc control bits & bufcount */
 180         uint32  ctrl2;          /* buffer count and address extension */
 181         uint32  addrlow;        /* memory address of the date buffer, bits 31:0 */
 182         uint32  addrhigh;       /* memory address of the date buffer, bits 63:32 */
 183 } dma64dd_t;
 184
 185 /*
 186  * Each descriptor ring must be 8kB aligned, and fit within a contiguous 8kB physical addresss.
 187  */
 188 #define D64MAXRINGSZ    8192
 189 #define D64RINGALIGN    8192
 190 #define D64MAXDD        (D64MAXRINGSZ / sizeof (dma64dd_t))
 191
 192 /* transmit channel control */
 193 #define D64_XC_XE               0x00000001      /* transmit enable */
 194 #define D64_XC_SE               0x00000002      /* transmit suspend request */
 195 #define D64_XC_LE               0x00000004      /* loopback enable */
 196 #define D64_XC_FL               0x00000010      /* flush request */
 197 #define D64_XC_AE               0x00030000      /* address extension bits */
 198 #define D64_XC_AE_SHIFT         16
 199
 200 /* transmit descriptor table pointer */
 201 #define D64_XP_LD_MASK          0x00000fff      /* last valid descriptor */
 202
 203 /* transmit channel status */
 204 #define D64_XS0_CD_MASK         0x00001fff      /* current descriptor pointer */
 205 #define D64_XS0_XS_MASK         0xf0000000      /* transmit state */
 206 #define D64_XS0_XS_SHIFT                28
 207 #define D64_XS0_XS_DISABLED     0x00000000      /* disabled */
 208 #define D64_XS0_XS_ACTIVE       0x10000000      /* active */
 209 #define D64_XS0_XS_IDLE         0x20000000      /* idle wait */
 210 #define D64_XS0_XS_STOPPED      0x30000000      /* stopped */
 211 #define D64_XS0_XS_SUSP         0x40000000      /* suspend pending */
 212
 213 #define D64_XS1_AD_MASK         0x0001ffff      /* active descriptor */
 214 #define D64_XS1_XE_MASK         0xf0000000      /* transmit errors */
 215 #define D64_XS1_XE_SHIFT                28
 216 #define D64_XS1_XE_NOERR        0x00000000      /* no error */
 217 #define D64_XS1_XE_DPE          0x10000000      /* descriptor protocol error */
 218 #define D64_XS1_XE_DFU          0x20000000      /* data fifo underrun */
 219 #define D64_XS1_XE_DTE          0x30000000      /* data transfer error */
 220 #define D64_XS1_XE_DESRE        0x40000000      /* descriptor read error */
 221 #define D64_XS1_XE_COREE        0x50000000      /* core error */
 222
 223 /* receive channel control */
 224 #define D64_RC_RE               0x00000001      /* receive enable */
 225 #define D64_RC_RO_MASK          0x000000fe      /* receive frame offset */
 226 #define D64_RC_RO_SHIFT         1
 227 #define D64_RC_FM               0x00000100      /* direct fifo receive (pio) mode */
 228 #define D64_RC_AE               0x00030000      /* address extension bits */
 229 #define D64_RC_AE_SHIFT         16
 230
 231 /* receive descriptor table pointer */
 232 #define D64_RP_LD_MASK          0x00000fff      /* last valid descriptor */
 233
 234 /* receive channel status */
 235 #define D64_RS0_CD_MASK         0x00001fff      /* current descriptor pointer */
 236 #define D64_RS0_RS_MASK         0xf0000000      /* receive state */
 237 #define D64_RS0_RS_SHIFT                28
 238 #define D64_RS0_RS_DISABLED     0x00000000      /* disabled */
 239 #define D64_RS0_RS_ACTIVE       0x10000000      /* active */
 240 #define D64_RS0_RS_IDLE         0x20000000      /* idle wait */
 241 #define D64_RS0_RS_STOPPED      0x30000000      /* stopped */
 242 #define D64_RS0_RS_SUSP         0x40000000      /* suspend pending */
 243
 244 #define D64_RS1_AD_MASK         0x0001ffff      /* active descriptor */
 245 #define D64_RS1_RE_MASK         0xf0000000      /* receive errors */
 246 #define D64_RS1_RE_SHIFT                28
 247 #define D64_RS1_RE_NOERR        0x00000000      /* no error */
 248 #define D64_RS1_RE_DPO          0x10000000      /* descriptor protocol error */
 249 #define D64_RS1_RE_DFU          0x20000000      /* data fifo overflow */
 250 #define D64_RS1_RE_DTE          0x30000000      /* data transfer error */
 251 #define D64_RS1_RE_DESRE        0x40000000      /* descriptor read error */
 252 #define D64_RS1_RE_COREE        0x50000000      /* core error */
 253
 254 /* fifoaddr */
 255 #define D64_FA_OFF_MASK         0xffff          /* offset */
 256 #define D64_FA_SEL_MASK         0xf0000         /* select */
 257 #define D64_FA_SEL_SHIFT        16
 258 #define D64_FA_SEL_XDD          0x00000         /* transmit dma data */
 259 #define D64_FA_SEL_XDP          0x10000         /* transmit dma pointers */
 260 #define D64_FA_SEL_RDD          0x40000         /* receive dma data */
 261 #define D64_FA_SEL_RDP          0x50000         /* receive dma pointers */
 262 #define D64_FA_SEL_XFD          0x80000         /* transmit fifo data */
 263 #define D64_FA_SEL_XFP          0x90000         /* transmit fifo pointers */
 264 #define D64_FA_SEL_RFD          0xc0000         /* receive fifo data */
 265 #define D64_FA_SEL_RFP          0xd0000         /* receive fifo pointers */
 266 #define D64_FA_SEL_RSD          0xe0000         /* receive frame status data */
 267 #define D64_FA_SEL_RSP          0xf0000         /* receive frame status pointers */
 268
 269 /* descriptor control flags 1 */
 270 #define D64_CTRL1_EOT           ((uint32)1 << 28)       /* end of descriptor table */
 271 #define D64_CTRL1_IOC           ((uint32)1 << 29)       /* interrupt on completion */
 272 #define D64_CTRL1_EOF           ((uint32)1 << 30)       /* end of frame */
 273 #define D64_CTRL1_SOF           ((uint32)1 << 31)       /* start of frame */
 274
 275 /* descriptor control flags 2 */
 276 #define D64_CTRL2_BC_MASK       0x00007fff      /* buffer byte count mask */
 277 #define D64_CTRL2_AE            0x00030000      /* address extension bits */
 278 #define D64_CTRL2_AE_SHIFT      16
 279
 280 /* control flags in the range [27:20] are core-specific and not defined here */
 281 #define D64_CTRL_CORE_MASK      0x0ff00000
 282
 283
 284 #endif  /* _sbhnddma_h_ */