drivers/atm/uPD98401.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* drivers/atm/uPD98401.h - NEC uPD98401 (SAR) declarations */
   3
   4 /* Written 1995 by Werner Almesberger, EPFL LRC */
   5
   6
   7 #ifndef DRIVERS_ATM_uPD98401_H
   8 #define DRIVERS_ATM_uPD98401_H
   9
  10
  11 #define MAX_CRAM_SIZE   (1 << 18)       /* 2^18 words */
  12 #define RAM_INCREMENT   1024            /* check in 4 kB increments */
  13
  14 #define uPD98401_PORTS  0x24            /* probably more ? */
  15
  16
  17 /*
  18  * Commands
  19  */
  20
  21 #define uPD98401_OPEN_CHAN      0x20000000 /* open channel */
  22 #define uPD98401_CHAN_ADDR      0x0003fff8 /*   channel address */
  23 #define uPD98401_CHAN_ADDR_SHIFT 3
  24 #define uPD98401_CLOSE_CHAN     0x24000000 /* close channel */
  25 #define uPD98401_CHAN_RT        0x02000000 /*   RX/TX (0 TX, 1 RX) */
  26 #define uPD98401_DEACT_CHAN     0x28000000 /* deactivate channel */
  27 #define uPD98401_TX_READY       0x30000000 /* TX ready */
  28 #define uPD98401_ADD_BAT        0x34000000 /* add batches */
  29 #define uPD98401_POOL           0x000f0000 /* pool number */
  30 #define uPD98401_POOL_SHIFT     16
  31 #define uPD98401_POOL_NUMBAT    0x0000ffff /* number of batches */
  32 #define uPD98401_NOP            0x3f000000 /* NOP */
  33 #define uPD98401_IND_ACC        0x00000000 /* Indirect Access */
  34 #define uPD98401_IA_RW          0x10000000 /*   Read/Write (0 W, 1 R) */
  35 #define uPD98401_IA_B3          0x08000000 /*   Byte select, 1 enable */
  36 #define uPD98401_IA_B2          0x04000000
  37 #define uPD98401_IA_B1          0x02000000
  38 #define uPD98401_IA_B0          0x01000000
  39 #define uPD98401_IA_BALL        0x0f000000 /*   whole longword */
  40 #define uPD98401_IA_TGT         0x000c0000 /*   Target */
  41 #define uPD98401_IA_TGT_SHIFT   18
  42 #define uPD98401_IA_TGT_CM      0          /*   - Control Memory */
  43 #define uPD98401_IA_TGT_SAR     1          /*   - uPD98401 registers */
  44 #define uPD98401_IA_TGT_PHY     3          /*   - PHY device */
  45 #define uPD98401_IA_ADDR        0x0003ffff
  46
  47 /*
  48  * Command Register Status
  49  */
  50
  51 #define uPD98401_BUSY           0x80000000 /* SAR is busy */
  52 #define uPD98401_LOCKED         0x40000000 /* SAR is locked by other CPU */
  53
  54 /*
  55  * Indications
  56  */
  57
  58 /* Normal (AAL5) Receive Indication */
  59 #define uPD98401_AAL5_UINFO     0xffff0000 /* user-supplied information */
  60 #define uPD98401_AAL5_UINFO_SHIFT 16
  61 #define uPD98401_AAL5_SIZE      0x0000ffff /* PDU size (in _CELLS_ !!) */
  62 #define uPD98401_AAL5_CHAN      0x7fff0000 /* Channel number */
  63 #define uPD98401_AAL5_CHAN_SHIFT        16
  64 #define uPD98401_AAL5_ERR       0x00008000 /* Error indication */
  65 #define uPD98401_AAL5_CI        0x00004000 /* Congestion Indication */
  66 #define uPD98401_AAL5_CLP       0x00002000 /* CLP (>= 1 cell had CLP=1) */
  67 #define uPD98401_AAL5_ES        0x00000f00 /* Error Status */
  68 #define uPD98401_AAL5_ES_SHIFT  8
  69 #define uPD98401_AAL5_ES_NONE   0          /*   No error */
  70 #define uPD98401_AAL5_ES_FREE   1          /*   Receiver free buf underflow */
  71 #define uPD98401_AAL5_ES_FIFO   2          /*   Receiver FIFO overrun */
  72 #define uPD98401_AAL5_ES_TOOBIG 3          /*   Maximum length violation */
  73 #define uPD98401_AAL5_ES_CRC    4          /*   CRC error */
  74 #define uPD98401_AAL5_ES_ABORT  5          /*   User abort */
  75 #define uPD98401_AAL5_ES_LENGTH 6          /*   Length violation */
  76 #define uPD98401_AAL5_ES_T1     7          /*   T1 error (timeout) */
  77 #define uPD98401_AAL5_ES_DEACT  8          /*   Deactivated with DEACT_CHAN */
  78 #define uPD98401_AAL5_POOL      0x0000001f /* Free buffer pool number */
  79
  80 /* Raw Cell Indication */
  81 #define uPD98401_RAW_UINFO      uPD98401_AAL5_UINFO
  82 #define uPD98401_RAW_UINFO_SHIFT uPD98401_AAL5_UINFO_SHIFT
  83 #define uPD98401_RAW_HEC        0x000000ff /* HEC */
  84 #define uPD98401_RAW_CHAN       uPD98401_AAL5_CHAN
  85 #define uPD98401_RAW_CHAN_SHIFT uPD98401_AAL5_CHAN_SHIFT
  86
  87 /* Transmit Indication */
  88 #define uPD98401_TXI_CONN       0x7fff0000 /* Connection Number */
  89 #define uPD98401_TXI_CONN_SHIFT 16
  90 #define uPD98401_TXI_ACTIVE     0x00008000 /* Channel remains active */
  91 #define uPD98401_TXI_PQP        0x00007fff /* Packet Queue Pointer */
  92
  93 /*
  94  * Directly Addressable Registers
  95  */
  96
  97 #define uPD98401_GMR    0x00    /* General Mode Register */
  98 #define uPD98401_GSR    0x01    /* General Status Register */
  99 #define uPD98401_IMR    0x02    /* Interrupt Mask Register */
 100 #define uPD98401_RQU    0x03    /* Receive Queue Underrun */
 101 #define uPD98401_RQA    0x04    /* Receive Queue Alert */
 102 #define uPD98401_ADDR   0x05    /* Last Burst Address */
 103 #define uPD98401_VER    0x06    /* Version Number */
 104 #define uPD98401_SWR    0x07    /* Software Reset */
 105 #define uPD98401_CMR    0x08    /* Command Register */
 106 #define uPD98401_CMR_L  0x09    /* Command Register and Lock/Unlock */
 107 #define uPD98401_CER    0x0a    /* Command Extension Register */
 108 #define uPD98401_CER_L  0x0b    /* Command Ext Reg and Lock/Unlock */
 109
 110 #define uPD98401_MSH(n) (0x10+(n))      /* Mailbox n Start Address High */
 111 #define uPD98401_MSL(n) (0x14+(n))      /* Mailbox n Start Address High */
 112 #define uPD98401_MBA(n) (0x18+(n))      /* Mailbox n Bottom Address */
 113 #define uPD98401_MTA(n) (0x1c+(n))      /* Mailbox n Tail Address */
 114 #define uPD98401_MWA(n) (0x20+(n))      /* Mailbox n Write Address */
 115
 116 /* GMR is at 0x00 */
 117 #define uPD98401_GMR_ONE        0x80000000 /* Must be set to one */
 118 #define uPD98401_GMR_SLM        0x40000000 /* Address mode (0 word, 1 byte) */
 119 #define uPD98401_GMR_CPE        0x00008000 /* Control Memory Parity Enable */
 120 #define uPD98401_GMR_LP         0x00004000 /* Loopback */
 121 #define uPD98401_GMR_WA         0x00002000 /* Early Bus Write Abort/RDY */
 122 #define uPD98401_GMR_RA         0x00001000 /* Early Read Abort/RDY */
 123 #define uPD98401_GMR_SZ         0x00000f00 /* Burst Size Enable */
 124 #define uPD98401_BURST16        0x00000800 /*   16-word burst */
 125 #define uPD98401_BURST8         0x00000400 /*    8-word burst */
 126 #define uPD98401_BURST4         0x00000200 /*    4-word burst */
 127 #define uPD98401_BURST2         0x00000100 /*    2-word burst */
 128 #define uPD98401_GMR_AD         0x00000080 /* Address (burst resolution) Disable */
 129 #define uPD98401_GMR_BO         0x00000040 /* Byte Order (0 little, 1 big) */
 130 #define uPD98401_GMR_PM         0x00000020 /* Bus Parity Mode (0 byte, 1 word)*/
 131 #define uPD98401_GMR_PC         0x00000010 /* Bus Parity Control (0even,1odd) */
 132 #define uPD98401_GMR_BPE        0x00000008 /* Bus Parity Enable */
 133 #define uPD98401_GMR_DR         0x00000004 /* Receive Drop Mode (0drop,1don't)*/
 134 #define uPD98401_GMR_SE         0x00000002 /* Shapers Enable */
 135 #define uPD98401_GMR_RE         0x00000001 /* Receiver Enable */
 136
 137 /* GSR is at 0x01, IMR is at 0x02 */
 138 #define uPD98401_INT_PI         0x80000000 /* PHY interrupt */
 139 #define uPD98401_INT_RQA        0x40000000 /* Receive Queue Alert */
 140 #define uPD98401_INT_RQU        0x20000000 /* Receive Queue Underrun */
 141 #define uPD98401_INT_RD         0x10000000 /* Receiver Deactivated */
 142 #define uPD98401_INT_SPE        0x08000000 /* System Parity Error */
 143 #define uPD98401_INT_CPE        0x04000000 /* Control Memory Parity Error */
 144 #define uPD98401_INT_SBE        0x02000000 /* System Bus Error */
 145 #define uPD98401_INT_IND        0x01000000 /* Initialization Done */
 146 #define uPD98401_INT_RCR        0x0000ff00 /* Raw Cell Received */
 147 #define uPD98401_INT_RCR_SHIFT  8
 148 #define uPD98401_INT_MF         0x000000f0 /* Mailbox Full */
 149 #define uPD98401_INT_MF_SHIFT   4
 150 #define uPD98401_INT_MM         0x0000000f /* Mailbox Modified */
 151
 152 /* VER is at 0x06 */
 153 #define uPD98401_MAJOR          0x0000ff00 /* Major revision */
 154 #define uPD98401_MAJOR_SHIFT    8
 155 #define uPD98401_MINOR          0x000000ff /* Minor revision */
 156
 157 /*
 158  * Indirectly Addressable Registers
 159  */
 160
 161 #define uPD98401_IM(n)  (0x40000+(n))   /* Scheduler n I and M */
 162 #define uPD98401_X(n)   (0x40010+(n))   /* Scheduler n X */
 163 #define uPD98401_Y(n)   (0x40020+(n))   /* Scheduler n Y */
 164 #define uPD98401_PC(n)  (0x40030+(n))   /* Scheduler n P, C, p and c */
 165 #define uPD98401_PS(n)  (0x40040+(n))   /* Scheduler n priority and status */
 166
 167 /* IM contents */
 168 #define uPD98401_IM_I           0xff000000 /* I */
 169 #define uPD98401_IM_I_SHIFT     24
 170 #define uPD98401_IM_M           0x00ffffff /* M */
 171
 172 /* PC contents */
 173 #define uPD98401_PC_P           0xff000000 /* P */
 174 #define uPD98401_PC_P_SHIFT     24
 175 #define uPD98401_PC_C           0x00ff0000 /* C */
 176 #define uPD98401_PC_C_SHIFT     16
 177 #define uPD98401_PC_p           0x0000ff00 /* p */
 178 #define uPD98401_PC_p_SHIFT     8
 179 #define uPD98401_PC_c           0x000000ff /* c */
 180
 181 /* PS contents */
 182 #define uPD98401_PS_PRIO        0xf0    /* Priority level (0 high, 15 low) */
 183 #define uPD98401_PS_PRIO_SHIFT  4
 184 #define uPD98401_PS_S           0x08    /* Scan - must be 0 (internal) */
 185 #define uPD98401_PS_R           0x04    /* Round Robin (internal) */
 186 #define uPD98401_PS_A           0x02    /* Active (internal) */
 187 #define uPD98401_PS_E           0x01    /* Enabled */
 188
 189 #define uPD98401_TOS    0x40100 /* Top of Stack Control Memory Address */
 190 #define uPD98401_SMA    0x40200 /* Shapers Control Memory Start Address */
 191 #define uPD98401_PMA    0x40201 /* Receive Pool Control Memory Start Address */
 192 #define uPD98401_T1R    0x40300 /* T1 Register */
 193 #define uPD98401_VRR    0x40301 /* VPI/VCI Reduction Register/Recv. Shutdown */
 194 #define uPD98401_TSR    0x40302 /* Time-Stamp Register */
 195
 196 /* VRR is at 0x40301 */
 197 #define uPD98401_VRR_SDM        0x80000000 /* Shutdown Mode */
 198 #define uPD98401_VRR_SHIFT      0x000f0000 /* VPI/VCI Shift */
 199 #define uPD98401_VRR_SHIFT_SHIFT 16
 200 #define uPD98401_VRR_MASK       0x0000ffff /* VPI/VCI mask */
 201
 202 /*
 203  * TX packet descriptor
 204  */
 205
 206 #define uPD98401_TXPD_SIZE      16         /* descriptor size (in bytes) */
 207
 208 #define uPD98401_TXPD_V         0x80000000 /* Valid bit */
 209 #define uPD98401_TXPD_DP        0x40000000 /* Descriptor (1) or Pointer (0) */
 210 #define uPD98401_TXPD_SM        0x20000000 /* Single (1) or Multiple (0) */
 211 #define uPD98401_TXPD_CLPM      0x18000000 /* CLP mode */
 212 #define uPD98401_CLPM_0         0          /*   00 CLP = 0 */
 213 #define uPD98401_CLPM_1         3          /*   11 CLP = 1 */
 214 #define uPD98401_CLPM_LAST      1          /*   01 CLP unless last cell */
 215 #define uPD98401_TXPD_CLPM_SHIFT 27
 216 #define uPD98401_TXPD_PTI       0x07000000 /* PTI pattern */
 217 #define uPD98401_TXPD_PTI_SHIFT 24
 218 #define uPD98401_TXPD_GFC       0x00f00000 /* GFC pattern */
 219 #define uPD98401_TXPD_GFC_SHIFT 20
 220 #define uPD98401_TXPD_C10       0x00040000 /* insert CRC-10 */
 221 #define uPD98401_TXPD_AAL5      0x00020000 /* AAL5 processing */
 222 #define uPD98401_TXPD_MB        0x00010000 /* TX mailbox number */
 223 #define uPD98401_TXPD_UU        0x0000ff00 /* CPCS-UU */
 224 #define uPD98401_TXPD_UU_SHIFT  8
 225 #define uPD98401_TXPD_CPI       0x000000ff /* CPI */
 226
 227 /*
 228  * TX buffer descriptor
 229  */
 230
 231 #define uPD98401_TXBD_SIZE      8          /* descriptor size (in bytes) */
 232
 233 #define uPD98401_TXBD_LAST      0x80000000 /* last buffer in packet */
 234
 235 /*
 236  * TX VC table
 237  */
 238
 239 /* 1st word has the same structure as in a TX packet descriptor */
 240 #define uPD98401_TXVC_L         0x80000000 /* last buffer */
 241 #define uPD98401_TXVC_SHP       0x0f000000 /* shaper number */
 242 #define uPD98401_TXVC_SHP_SHIFT 24
 243 #define uPD98401_TXVC_VPI       0x00ff0000 /* VPI */
 244 #define uPD98401_TXVC_VPI_SHIFT 16
 245 #define uPD98401_TXVC_VCI       0x0000ffff /* VCI */
 246 #define uPD98401_TXVC_QRP       6          /* Queue Read Pointer is in word 6 */
 247
 248 /*
 249  * RX free buffer pools descriptor
 250  */
 251
 252 #define uPD98401_RXFP_ALERT     0x70000000 /* low water mark */
 253 #define uPD98401_RXFP_ALERT_SHIFT 28
 254 #define uPD98401_RXFP_BFSZ      0x0f000000 /* buffer size, 64*2^n */
 255 #define uPD98401_RXFP_BFSZ_SHIFT 24
 256 #define uPD98401_RXFP_BTSZ      0x00ff0000 /* batch size, n+1 */
 257 #define uPD98401_RXFP_BTSZ_SHIFT 16
 258 #define uPD98401_RXFP_REMAIN    0x0000ffff /* remaining batches in pool */
 259
 260 /*
 261  * RX VC table
 262  */
 263
 264 #define uPD98401_RXVC_BTSZ      0xff000000 /* remaining free buffers in batch */
 265 #define uPD98401_RXVC_BTSZ_SHIFT 24
 266 #define uPD98401_RXVC_MB        0x00200000 /* RX mailbox number */
 267 #define uPD98401_RXVC_POOL      0x001f0000 /* free buffer pool number */
 268 #define uPD98401_RXVC_POOL_SHIFT 16
 269 #define uPD98401_RXVC_UINFO     0x0000ffff /* user-supplied information */
 270 #define uPD98401_RXVC_T1        0xffff0000 /* T1 timestamp */
 271 #define uPD98401_RXVC_T1_SHIFT  16
 272 #define uPD98401_RXVC_PR        0x00008000 /* Packet Reception, 1 if busy */
 273 #define uPD98401_RXVC_DR        0x00004000 /* FIFO Drop */
 274 #define uPD98401_RXVC_OD        0x00001000 /* Drop OAM cells */
 275 #define uPD98401_RXVC_AR        0x00000800 /* AAL5 or raw cell; 1 if AAL5 */
 276 #define uPD98401_RXVC_MAXSEG    0x000007ff /* max number of segments per PDU */
 277 #define uPD98401_RXVC_REM       0xfffe0000 /* remaining words in curr buffer */
 278 #define uPD98401_RXVC_REM_SHIFT 17
 279 #define uPD98401_RXVC_CLP       0x00010000 /* CLP received */
 280 #define uPD98401_RXVC_BFA       0x00008000 /* Buffer Assigned */
 281 #define uPD98401_RXVC_BTA       0x00004000 /* Batch Assigned */
 282 #define uPD98401_RXVC_CI        0x00002000 /* Congestion Indication */
 283 #define uPD98401_RXVC_DD        0x00001000 /* Dropping incoming cells */
 284 #define uPD98401_RXVC_DP        0x00000800 /* like PR ? */
 285 #define uPD98401_RXVC_CURSEG    0x000007ff /* Current Segment count */
 286
 287 /*
 288  * RX lookup table
 289  */
 290
 291 #define uPD98401_RXLT_ENBL      0x8000     /* Enable */
 292
 293 #endif