i386/linux-2.3.21/drivers/scsi/NCR53C9x.h

   1 /* NCR53C9x.c:  Defines and structures for the NCR53C9x generic driver.
   2  *
   3  * Originaly esp.h:  Defines and structures for the Sparc ESP
   4  *                   (Enhanced SCSI Processor) driver under Linux.
   5  *
   6  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   7  *
   8  * Generalization by Jesper Skov (jskov@cygnus.co.uk)
   9  *
  10  * More generalization (for i386 stuff) by Tymm Twillman (tymm@computer.org)
  11  */
  12
  13 #ifndef NCR53C9X_H
  14 #define NCR53C9X_H
  15
  16 #include <linux/config.h>
  17
  18 /* djweis for mac driver */
  19 #if defined(CONFIG_MAC)
  20 #define PAD_SIZE 15
  21 #else
  22 #define PAD_SIZE 3
  23 #endif
  24
  25 /* Handle multiple hostadapters on Amiga
  26  * generally PAD_SIZE = 3
  27  * but there is one exception: Oktagon (PAD_SIZE = 1) */
  28 #if defined(CONFIG_OKTAGON_SCSI) || defined(CONFIG_OKTAGON_SCSI_MODULE)
  29 #undef PAD_SIZE
  30 #if defined(CONFIG_BLZ1230_SCSI) || defined(CONFIG_BLZ1230_SCSI_MODULE) || \
  31     defined(CONFIG_BLZ2060_SCSI) || defined(CONFIG_BLZ2060_SCSI_MODULE) || \
  32     defined(CONFIG_CYBERSTORM_SCSI) || defined(CONFIG_CYBERSTORM_SCSI_MODULE) || \
  33     defined(CONFIG_CYBERSTORMII_SCSI) || defined(CONFIG_CYBERSTORMII_SCSI_MODULE) || \
  34     defined(CONFIG_FASTLANE_SCSI) || defined(CONFIG_FASTLANE_SCSI_MODULE)
  35 #define MULTIPLE_PAD_SIZES
  36 #else
  37 #define PAD_SIZE 1
  38 #endif
  39 #endif
  40
  41 /* Macros for debugging messages */
  42
  43 #define DEBUG_ESP
  44 /* #define DEBUG_ESP_DATA */
  45 /* #define DEBUG_ESP_QUEUE */
  46 /* #define DEBUG_ESP_DISCONNECT */
  47 /* #define DEBUG_ESP_STATUS */
  48 /* #define DEBUG_ESP_PHASES */
  49 /* #define DEBUG_ESP_WORKBUS */
  50 /* #define DEBUG_STATE_MACHINE */
  51 /* #define DEBUG_ESP_CMDS */
  52 /* #define DEBUG_ESP_IRQS */
  53 /* #define DEBUG_SDTR */
  54 /* #define DEBUG_ESP_SG */
  55
  56 /* Use the following to sprinkle debugging messages in a way which
  57  * suits you if combinations of the above become too verbose when
  58  * trying to track down a specific problem.
  59  */
  60 /* #define DEBUG_ESP_MISC */
  61
  62 #if defined(DEBUG_ESP)
  63 #define ESPLOG(foo)  printk foo
  64 #else
  65 #define ESPLOG(foo)
  66 #endif /* (DEBUG_ESP) */
  67
  68 #if defined(DEBUG_ESP_DATA)
  69 #define ESPDATA(foo)  printk foo
  70 #else
  71 #define ESPDATA(foo)
  72 #endif
  73
  74 #if defined(DEBUG_ESP_QUEUE)
  75 #define ESPQUEUE(foo)  printk foo
  76 #else
  77 #define ESPQUEUE(foo)
  78 #endif
  79
  80 #if defined(DEBUG_ESP_DISCONNECT)
  81 #define ESPDISC(foo)  printk foo
  82 #else
  83 #define ESPDISC(foo)
  84 #endif
  85
  86 #if defined(DEBUG_ESP_STATUS)
  87 #define ESPSTAT(foo)  printk foo
  88 #else
  89 #define ESPSTAT(foo)
  90 #endif
  91
  92 #if defined(DEBUG_ESP_PHASES)
  93 #define ESPPHASE(foo)  printk foo
  94 #else
  95 #define ESPPHASE(foo)
  96 #endif
  97
  98 #if defined(DEBUG_ESP_WORKBUS)
  99 #define ESPBUS(foo)  printk foo
 100 #else
 101 #define ESPBUS(foo)
 102 #endif
 103
 104 #if defined(DEBUG_ESP_IRQS)
 105 #define ESPIRQ(foo)  printk foo
 106 #else
 107 #define ESPIRQ(foo)
 108 #endif
 109
 110 #if defined(DEBUG_SDTR)
 111 #define ESPSDTR(foo)  printk foo
 112 #else
 113 #define ESPSDTR(foo)
 114 #endif
 115
 116 #if defined(DEBUG_ESP_MISC)
 117 #define ESPMISC(foo)  printk foo
 118 #else
 119 #define ESPMISC(foo)
 120 #endif
 121
 122 /*
 123  * padding for register structure
 124  */
 125 #ifdef CONFIG_JAZZ_ESP
 126 #define EREGS_PAD(n)
 127 #else
 128 #ifndef MULTIPLE_PAD_SIZES
 129 #define EREGS_PAD(n)    unchar n[PAD_SIZE];
 130 #endif
 131 #endif
 132
 133 /* The ESP SCSI controllers have their register sets in three
 134  * "classes":
 135  *
 136  * 1) Registers which are both read and write.
 137  * 2) Registers which are read only.
 138  * 3) Registers which are write only.
 139  *
 140  * Yet, they all live within the same IO space.
 141  */
 142
 143 #ifndef __i386__
 144
 145 #ifndef MULTIPLE_PAD_SIZES
 146
 147 #define esp_write(__reg, __val) ((__reg) = (__val))
 148 #define esp_read(__reg) (__reg)
 149
 150 struct ESP_regs {
 151                                 /* Access    Description              Offset */
 152     volatile unchar esp_tclow;  /* rw  Low bits of the transfer count 0x00   */
 153                                 EREGS_PAD(tlpad1);
 154     volatile unchar esp_tcmed;  /* rw  Mid bits of the transfer count 0x04   */
 155                                 EREGS_PAD(fdpad);
 156     volatile unchar esp_fdata;  /* rw  FIFO data bits                 0x08   */
 157                                 EREGS_PAD(cbpad);
 158     volatile unchar esp_cmnd;   /* rw  SCSI command bits              0x0c   */
 159                                 EREGS_PAD(stpad);
 160     volatile unchar esp_status; /* ro  ESP status register            0x10   */
 161 #define esp_busid   esp_status  /* wo  Bus ID for select/reselect     0x10   */
 162                                 EREGS_PAD(irqpd);
 163     volatile unchar esp_intrpt; /* ro  Kind of interrupt              0x14   */
 164 #define esp_timeo   esp_intrpt  /* wo  Timeout value for select/resel 0x14   */
 165                                 EREGS_PAD(sspad);
 166     volatile unchar esp_sstep;  /* ro  Sequence step register         0x18   */
 167 #define esp_stp     esp_sstep   /* wo  Transfer period per sync       0x18   */
 168                                 EREGS_PAD(ffpad);
 169     volatile unchar esp_fflags; /* ro  Bits of current FIFO info      0x1c   */
 170 #define esp_soff    esp_fflags  /* wo  Sync offset                    0x1c   */
 171                                 EREGS_PAD(cf1pd);
 172     volatile unchar esp_cfg1;   /* rw  First configuration register   0x20   */
 173                                 EREGS_PAD(cfpad);
 174     volatile unchar esp_cfact;  /* wo  Clock conversion factor        0x24   */
 175                                 EREGS_PAD(ctpad);
 176     volatile unchar esp_ctest;  /* wo  Chip test register             0x28   */
 177                                 EREGS_PAD(cf2pd);
 178     volatile unchar esp_cfg2;   /* rw  Second configuration register  0x2c   */
 179                                 EREGS_PAD(cf3pd);
 180
 181     /* The following is only found on the 53C9X series SCSI chips */
 182     volatile unchar esp_cfg3;   /* rw  Third configuration register   0x30  */
 183                                 EREGS_PAD(cf4pd);
 184     volatile unchar esp_cfg4;   /* rw  Fourth configuration register  0x34  */
 185                                 EREGS_PAD(thpd);
 186     /* The following is found on all chips except the NCR53C90 (ESP100) */
 187     volatile unchar esp_tchi;   /* rw  High bits of transfer count    0x38  */
 188 #define esp_uid     esp_tchi    /* ro  Unique ID code                 0x38  */
 189                                 EREGS_PAD(fgpad);
 190     volatile unchar esp_fgrnd;  /* rw  Data base for fifo             0x3c  */
 191 };
 192
 193 #else /* MULTIPLE_PAD_SIZES */
 194
 195 #define esp_write(__reg, __val) (*(__reg) = (__val))
 196 #define esp_read(__reg) (*(__reg))
 197
 198 struct ESP_regs {
 199     unsigned char io_addr[64]; /* dummy */
 200                                                  /* Access    Description              Offset */
 201 #define esp_tclow   io_addr                      /* rw  Low bits of the transfer count 0x00   */
 202 #define esp_tcmed   io_addr + (1<<(esp->shift))  /* rw  Mid bits of the transfer count 0x04   */
 203 #define esp_fdata   io_addr + (2<<(esp->shift))  /* rw  FIFO data bits                 0x08   */
 204 #define esp_cmnd    io_addr + (3<<(esp->shift))  /* rw  SCSI command bits              0x0c   */
 205 #define esp_status  io_addr + (4<<(esp->shift))  /* ro  ESP status register            0x10   */
 206 #define esp_busid   esp_status                   /* wo  Bus ID for select/reselect     0x10   */
 207 #define esp_intrpt  io_addr + (5<<(esp->shift))  /* ro  Kind of interrupt              0x14   */
 208 #define esp_timeo   esp_intrpt                   /* wo  Timeout value for select/resel 0x14   */
 209 #define esp_sstep   io_addr + (6<<(esp->shift))  /* ro  Sequence step register         0x18   */
 210 #define esp_stp     esp_sstep                    /* wo  Transfer period per sync       0x18   */
 211 #define esp_fflags  io_addr + (7<<(esp->shift))  /* ro  Bits of current FIFO info      0x1c   */
 212 #define esp_soff    esp_fflags                   /* wo  Sync offset                    0x1c   */
 213 #define esp_cfg1    io_addr + (8<<(esp->shift))  /* rw  First configuration register   0x20   */
 214 #define esp_cfact   io_addr + (9<<(esp->shift))  /* wo  Clock conversion factor        0x24   */
 215 #define esp_ctest   io_addr + (10<<(esp->shift)) /* wo  Chip test register             0x28   */
 216 #define esp_cfg2    io_addr + (11<<(esp->shift)) /* rw  Second configuration register  0x2c   */
 217
 218     /* The following is only found on the 53C9X series SCSI chips */
 219 #define esp_cfg3    io_addr + (12<<(esp->shift)) /* rw  Third configuration register   0x30  */
 220 #define esp_cfg4    io_addr + (13<<(esp->shift)) /* rw  Fourth configuration register  0x34  */
 221
 222     /* The following is found on all chips except the NCR53C90 (ESP100) */
 223 #define esp_tchi    io_addr + (14<<(esp->shift)) /* rw  High bits of transfer count    0x38  */
 224 #define esp_uid     esp_tchi                     /* ro  Unique ID code                 0x38  */
 225 #define esp_fgrnd   io_addr + (15<<(esp->shift)) /* rw  Data base for fifo             0x3c  */
 226 };
 227
 228 #endif
 229
 230 #else /* !defined __i386__ */
 231
 232 #define esp_write(__reg, __val) outb((__val), (__reg))
 233 #define esp_read(__reg) inb((__reg))
 234
 235 struct ESP_regs {
 236     unsigned int io_addr;
 237                                  /* Access    Description              Offset */
 238 #define esp_tclow   io_addr      /* rw  Low bits of the transfer count 0x00   */
 239 #define esp_tcmed   io_addr + 1  /* rw  Mid bits of the transfer count 0x04   */
 240 #define esp_fdata   io_addr + 2  /* rw  FIFO data bits                 0x08   */
 241 #define esp_cmnd    io_addr + 3  /* rw  SCSI command bits              0x0c   */
 242 #define esp_status  io_addr + 4  /* ro  ESP status register            0x10   */
 243 #define esp_busid   esp_status   /* wo  Bus ID for select/reselect     0x10   */
 244 #define esp_intrpt  io_addr + 5  /* ro  Kind of interrupt              0x14   */
 245 #define esp_timeo   esp_intrpt   /* wo  Timeout value for select/resel 0x14   */
 246 #define esp_sstep   io_addr + 6  /* ro  Sequence step register         0x18   */
 247 #define esp_stp     esp_sstep    /* wo  Transfer period per sync       0x18   */
 248 #define esp_fflags  io_addr + 7  /* ro  Bits of current FIFO info      0x1c   */
 249 #define esp_soff    esp_fflags   /* wo  Sync offset                    0x1c   */
 250 #define esp_cfg1    io_addr + 8  /* rw  First configuration register   0x20   */
 251 #define esp_cfact   io_addr + 9  /* wo  Clock conversion factor        0x24   */
 252 #define esp_ctest   io_addr + 10 /* wo  Chip test register             0x28   */
 253 #define esp_cfg2    io_addr + 11 /* rw  Second configuration register  0x2c   */
 254
 255     /* The following is only found on the 53C9X series SCSI chips */
 256 #define esp_cfg3    io_addr + 12 /* rw  Third configuration register   0x30  */
 257 #define esp_cfg4    io_addr + 13 /* rw  Fourth configuration register  0x34  */
 258
 259     /* The following is found on all chips except the NCR53C90 (ESP100) */
 260 #define esp_tchi    io_addr + 14 /* rw  High bits of transfer count    0x38  */
 261 #define esp_uid     esp_tchi     /* ro  Unique ID code                 0x38  */
 262 #define esp_fgrnd   io_addr + 15 /* rw  Data base for fifo             0x3c  */
 263 };
 264
 265 #endif /* !defined(__i386__) */
 266
 267 /* Various revisions of the ESP board. */
 268 enum esp_rev {
 269   esp100     = 0x00,  /* NCR53C90 - very broken */
 270   esp100a    = 0x01,  /* NCR53C90A */
 271   esp236     = 0x02,
 272   fas236     = 0x03,
 273   fas100a    = 0x04,
 274   fast       = 0x05,
 275   fas366     = 0x06,
 276   fas216     = 0x07,
 277   fsc        = 0x08,  /* SYM53C94-2 */
 278   espunknown = 0x09
 279 };
 280
 281 /* We get one of these for each ESP probed. */
 282 struct NCR_ESP {
 283   struct NCR_ESP *next;                   /* Next ESP on probed or NULL */
 284   struct ESP_regs *eregs;                 /* All esp registers */
 285   int dma;                                /* Who I do transfers with. */
 286   void *dregs;                            /* And his registers. */
 287   struct Scsi_Host *ehost;                /* Backpointer to SCSI Host */
 288
 289   void *edev;                             /* Pointer to controller base/SBus */
 290   int esp_id;                             /* Unique per-ESP ID number */
 291
 292   /* ESP Configuration Registers */
 293   unsigned char config1;                  /* Copy of the 1st config register */
 294   unsigned char config2;                  /* Copy of the 2nd config register */
 295   unsigned char config3[16];              /* Copy of the 3rd config register */
 296
 297   /* The current command we are sending to the ESP chip.  This esp_command
 298    * ptr needs to be mapped in DVMA area so we can send commands and read
 299    * from the ESP fifo without burning precious CPU cycles.  Programmed I/O
 300    * sucks when we have the DVMA to do it for us.  The ESP is stupid and will
 301    * only send out 6, 10, and 12 byte SCSI commands, others we need to send
 302    * one byte at a time.  esp_slowcmd being set says that we are doing one
 303    * of the command types ESP doesn't understand, esp_scmdp keeps track of
 304    * which byte we are sending, esp_scmdleft says how many bytes to go.
 305    */
 306   volatile unchar *esp_command;           /* Location of command (CPU view)  */
 307   __u32            esp_command_dvma;      /* Location of command (DVMA view) */
 308   unsigned char esp_clen;                 /* Length of this command */
 309   unsigned char esp_slowcmd;
 310   unsigned char *esp_scmdp;
 311   unsigned char esp_scmdleft;
 312
 313   /* The following are used to determine the cause of an IRQ. Upon every
 314    * IRQ entry we synchronize these with the hardware registers.
 315    */
 316   unchar ireg;                            /* Copy of ESP interrupt register */
 317   unchar sreg;                            /* Same for ESP status register */
 318   unchar seqreg;                          /* The ESP sequence register */
 319
 320   /* The following is set when a premature interrupt condition is detected
 321    * in some FAS revisions.
 322    */
 323   unchar fas_premature_intr_workaround;
 324
 325   /* To save register writes to the ESP, which can be expensive, we
 326    * keep track of the previous value that various registers had for
 327    * the last target we connected to.  If they are the same for the
 328    * current target, we skip the register writes as they are not needed.
 329    */
 330   unchar prev_soff, prev_stp, prev_cfg3;
 331
 332   /* For each target we keep track of save/restore data
 333    * pointer information.  This needs to be updated majorly
 334    * when we add support for tagged queueing.  -DaveM
 335    */
 336   struct esp_pointers {
 337           char *saved_ptr;
 338           struct scatterlist *saved_buffer;
 339           int saved_this_residual;
 340           int saved_buffers_residual;
 341   } data_pointers[16] /*XXX [MAX_TAGS_PER_TARGET]*/;
 342
 343   /* Clock periods, frequencies, synchronization, etc. */
 344   unsigned int cfreq;                    /* Clock frequency in HZ */
 345   unsigned int cfact;                    /* Clock conversion factor */
 346   unsigned int ccycle;                   /* One ESP clock cycle */
 347   unsigned int ctick;                    /* One ESP clock time */
 348   unsigned int radelay;                  /* FAST chip req/ack delay */
 349   unsigned int neg_defp;                 /* Default negotiation period */
 350   unsigned int sync_defp;                /* Default sync transfer period */
 351   unsigned int max_period;               /* longest our period can be */
 352   unsigned int min_period;               /* shortest period we can withstand */
 353   /* For slow to medium speed input clock rates we shoot for 5mb/s,
 354    * but for high input clock rates we try to do 10mb/s although I
 355    * don't think a transfer can even run that fast with an ESP even
 356    * with DMA2 scatter gather pipelining.
 357    */
 358 #define SYNC_DEFP_SLOW            0x32   /* 5mb/s  */
 359 #define SYNC_DEFP_FAST            0x19   /* 10mb/s */
 360
 361   unsigned int snip;                      /* Sync. negotiation in progress */
 362   unsigned int wnip;                      /* WIDE negotiation in progress */
 363   unsigned int targets_present;           /* targets spoken to before */
 364
 365   int current_transfer_size;              /* Set at beginning of data dma */
 366
 367   unchar espcmdlog[32];                   /* Log of current esp cmds sent. */
 368   unchar espcmdent;                       /* Current entry in esp cmd log. */
 369
 370   /* Misc. info about this ESP */
 371   enum esp_rev erev;                      /* ESP revision */
 372   int irq;                                /* IRQ for this ESP */
 373   int scsi_id;                            /* Who am I as initiator? */
 374   int scsi_id_mask;                       /* Bitmask of 'me'. */
 375   int diff;                               /* Differential SCSI bus? */
 376   int slot;                               /* Slot the adapter occupies */
 377
 378   /* Our command queues, only one cmd lives in the current_SC queue. */
 379   Scsi_Cmnd *issue_SC;           /* Commands to be issued */
 380   Scsi_Cmnd *current_SC;         /* Who is currently working the bus */
 381   Scsi_Cmnd *disconnected_SC;    /* Commands disconnected from the bus */
 382
 383   /* Message goo */
 384   unchar cur_msgout[16];
 385   unchar cur_msgin[16];
 386   unchar prevmsgout, prevmsgin;
 387   unchar msgout_len, msgin_len;
 388   unchar msgout_ctr, msgin_ctr;
 389
 390   /* States that we cannot keep in the per cmd structure because they
 391    * cannot be assosciated with any specific command.
 392    */
 393   unchar resetting_bus;
 394
 395   unchar do_pio_cmds;           /* Do command transfer with pio */
 396
 397   /* How much bits do we have to shift the registers */
 398   unsigned char shift;
 399
 400   /* Functions handling DMA
 401    */
 402   /* Required functions */
 403   int  (*dma_bytes_sent)(struct NCR_ESP *, int);
 404   int  (*dma_can_transfer)(struct NCR_ESP *, Scsi_Cmnd *);
 405   void (*dma_dump_state)(struct NCR_ESP *);
 406   void (*dma_init_read)(struct NCR_ESP *, __u32, int);
 407   void (*dma_init_write)(struct NCR_ESP *, __u32, int);
 408   void (*dma_ints_off)(struct NCR_ESP *);
 409   void (*dma_ints_on)(struct NCR_ESP *);
 410   int  (*dma_irq_p)(struct NCR_ESP *);
 411   int  (*dma_ports_p)(struct NCR_ESP *);
 412   void (*dma_setup)(struct NCR_ESP *, __u32, int, int);
 413
 414   /* Optional functions (i.e. may be initialized to 0) */
 415   void (*dma_barrier)(struct NCR_ESP *);
 416   void (*dma_drain)(struct NCR_ESP *);
 417   void (*dma_invalidate)(struct NCR_ESP *);
 418   void (*dma_irq_entry)(struct NCR_ESP *);
 419   void (*dma_irq_exit)(struct NCR_ESP *);
 420   void (*dma_led_off)(struct NCR_ESP *);
 421   void (*dma_led_on)(struct NCR_ESP *);
 422   void (*dma_poll)(struct NCR_ESP *, unsigned char *);
 423   void (*dma_reset)(struct NCR_ESP *);
 424
 425   /* Optional virtual DMA functions */
 426   void (*dma_mmu_get_scsi_one)(struct NCR_ESP *, Scsi_Cmnd *);
 427   void (*dma_mmu_get_scsi_sgl)(struct NCR_ESP *, Scsi_Cmnd *);
 428   void (*dma_mmu_release_scsi_one)(struct NCR_ESP *, Scsi_Cmnd *);
 429   void (*dma_mmu_release_scsi_sgl)(struct NCR_ESP *, Scsi_Cmnd *);
 430   void (*dma_advance_sg)(Scsi_Cmnd *);
 431 };
 432
 433 /* Bitfield meanings for the above registers. */
 434
 435 /* ESP config reg 1, read-write, found on all ESP chips */
 436 #define ESP_CONFIG1_ID        0x07             /* My BUS ID bits */
 437 #define ESP_CONFIG1_CHTEST    0x08             /* Enable ESP chip tests */
 438 #define ESP_CONFIG1_PENABLE   0x10             /* Enable parity checks */
 439 #define ESP_CONFIG1_PARTEST   0x20             /* Parity test mode enabled? */
 440 #define ESP_CONFIG1_SRRDISAB  0x40             /* Disable SCSI reset reports */
 441 #define ESP_CONFIG1_SLCABLE   0x80             /* Enable slow cable mode */
 442
 443 /* ESP config reg 2, read-write, found only on esp100a+esp200+esp236+fsc chips */
 444 #define ESP_CONFIG2_DMAPARITY 0x01             /* enable DMA Parity (200,236,fsc) */
 445 #define ESP_CONFIG2_REGPARITY 0x02             /* enable reg Parity (200,236,fsc) */
 446 #define ESP_CONFIG2_BADPARITY 0x04             /* Bad parity target abort  */
 447 #define ESP_CONFIG2_SCSI2ENAB 0x08             /* Enable SCSI-2 features (tmode only) */
 448 #define ESP_CONFIG2_HI        0x10             /* High Impedance DREQ ???  */
 449 #define ESP_CONFIG2_HMEFENAB  0x10             /* HME features enable */
 450 #define ESP_CONFIG2_BCM       0x20             /* Enable byte-ctrl (236,fsc)   */
 451 #define ESP_CONFIG2_FENAB     0x40             /* Enable features (fas100,esp216,fsc)      */
 452 #define ESP_CONFIG2_SPL       0x40             /* Enable status-phase latch (esp236)   */
 453 #define ESP_CONFIG2_RFB       0x80             /* Reserve FIFO byte (fsc) */
 454 #define ESP_CONFIG2_MAGIC     0xe0             /* Invalid bits... */
 455
 456 /* ESP config register 3 read-write, found only esp236+fas236+fas100a+fsc chips */
 457 #define ESP_CONFIG3_FCLOCK    0x01             /* FAST SCSI clock rate (esp100a/fas366) */
 458 #define ESP_CONFIG3_TEM       0x01             /* Enable thresh-8 mode (esp/fas236/fsc)  */
 459 #define ESP_CONFIG3_FAST      0x02             /* Enable FAST SCSI     (esp100a) */
 460 #define ESP_CONFIG3_ADMA      0x02             /* Enable alternate-dma (esp/fas236/fsc)  */
 461 #define ESP_CONFIG3_TENB      0x04             /* group2 SCSI2 support (esp100a) */
 462 #define ESP_CONFIG3_SRB       0x04             /* Save residual byte   (esp/fas236/fsc)  */
 463 #define ESP_CONFIG3_TMS       0x08             /* Three-byte msg's ok  (esp100a) */
 464 #define ESP_CONFIG3_FCLK      0x08             /* Fast SCSI clock rate (esp/fas236/fsc)  */
 465 #define ESP_CONFIG3_IDMSG     0x10             /* ID message checking  (esp100a) */
 466 #define ESP_CONFIG3_FSCSI     0x10             /* Enable FAST SCSI     (esp/fas236/fsc)  */
 467 #define ESP_CONFIG3_GTM       0x20             /* group2 SCSI2 support (esp/fas236/fsc)  */
 468 #define ESP_CONFIG3_TBMS      0x40             /* Three-byte msg's ok  (esp/fas236/fsc)  */
 469 #define ESP_CONFIG3_IMS       0x80             /* ID msg chk'ng        (esp/fas236/fsc)  */
 470
 471 /* ESP config register 4 read-write, found only on fsc chips */
 472 #define ESP_CONFIG4_BBTE      0x01             /* Back-to-Back transfer enable */
 473 #define ESP_CONFIG4_TEST      0x02             /* Transfer counter test mode */
 474 #define ESP_CONFIG4_EAN       0x04             /* Enable Active Negotiation */
 475
 476 /* ESP command register read-write */
 477 /* Group 1 commands:  These may be sent at any point in time to the ESP
 478  *                    chip.  None of them can generate interrupts 'cept
 479  *                    the "SCSI bus reset" command if you have not disabled
 480  *                    SCSI reset interrupts in the config1 ESP register.
 481  */
 482 #define ESP_CMD_NULL          0x00             /* Null command, ie. a nop */
 483 #define ESP_CMD_FLUSH         0x01             /* FIFO Flush */
 484 #define ESP_CMD_RC            0x02             /* Chip reset */
 485 #define ESP_CMD_RS            0x03             /* SCSI bus reset */
 486
 487 /* Group 2 commands:  ESP must be an initiator and connected to a target
 488  *                    for these commands to work.
 489  */
 490 #define ESP_CMD_TI            0x10             /* Transfer Information */
 491 #define ESP_CMD_ICCSEQ        0x11             /* Initiator cmd complete sequence */
 492 #define ESP_CMD_MOK           0x12             /* Message okie-dokie */
 493 #define ESP_CMD_TPAD          0x18             /* Transfer Pad */
 494 #define ESP_CMD_SATN          0x1a             /* Set ATN */
 495 #define ESP_CMD_RATN          0x1b             /* De-assert ATN */
 496
 497 /* Group 3 commands:  ESP must be in the MSGOUT or MSGIN state and be connected
 498  *                    to a target as the initiator for these commands to work.
 499  */
 500 #define ESP_CMD_SMSG          0x20             /* Send message */
 501 #define ESP_CMD_SSTAT         0x21             /* Send status */
 502 #define ESP_CMD_SDATA         0x22             /* Send data */
 503 #define ESP_CMD_DSEQ          0x23             /* Discontinue Sequence */
 504 #define ESP_CMD_TSEQ          0x24             /* Terminate Sequence */
 505 #define ESP_CMD_TCCSEQ        0x25             /* Target cmd cmplt sequence */
 506 #define ESP_CMD_DCNCT         0x27             /* Disconnect */
 507 #define ESP_CMD_RMSG          0x28             /* Receive Message */
 508 #define ESP_CMD_RCMD          0x29             /* Receive Command */
 509 #define ESP_CMD_RDATA         0x2a             /* Receive Data */
 510 #define ESP_CMD_RCSEQ         0x2b             /* Receive cmd sequence */
 511
 512 /* Group 4 commands:  The ESP must be in the disconnected state and must
 513  *                    not be connected to any targets as initiator for
 514  *                    these commands to work.
 515  */
 516 #define ESP_CMD_RSEL          0x40             /* Reselect */
 517 #define ESP_CMD_SEL           0x41             /* Select w/o ATN */
 518 #define ESP_CMD_SELA          0x42             /* Select w/ATN */
 519 #define ESP_CMD_SELAS         0x43             /* Select w/ATN & STOP */
 520 #define ESP_CMD_ESEL          0x44             /* Enable selection */
 521 #define ESP_CMD_DSEL          0x45             /* Disable selections */
 522 #define ESP_CMD_SA3           0x46             /* Select w/ATN3 */
 523 #define ESP_CMD_RSEL3         0x47             /* Reselect3 */
 524
 525 /* This bit enables the ESP's DMA */
 526 #define ESP_CMD_DMA           0x80             /* Do DMA? */
 527
 528 /* ESP status register read-only */
 529 #define ESP_STAT_PIO          0x01             /* IO phase bit */
 530 #define ESP_STAT_PCD          0x02             /* CD phase bit */
 531 #define ESP_STAT_PMSG         0x04             /* MSG phase bit */
 532 #define ESP_STAT_PMASK        0x07             /* Mask of phase bits */
 533 #define ESP_STAT_TDONE        0x08             /* Transfer Completed */
 534 #define ESP_STAT_TCNT         0x10             /* Transfer Counter Is Zero */
 535 #define ESP_STAT_PERR         0x20             /* Parity error */
 536 #define ESP_STAT_SPAM         0x40             /* Real bad error */
 537 /* This indicates the 'interrupt pending' condition, it is a reserved
 538  * bit on old revs of the ESP (ESP100, ESP100A, FAS100A).
 539  */
 540 #define ESP_STAT_INTR         0x80             /* Interrupt */
 541
 542 /* The status register can be masked with ESP_STAT_PMASK and compared
 543  * with the following values to determine the current phase the ESP
 544  * (at least thinks it) is in.  For our purposes we also add our own
 545  * software 'done' bit for our phase management engine.
 546  */
 547 #define ESP_DOP   (0)                                       /* Data Out  */
 548 #define ESP_DIP   (ESP_STAT_PIO)                            /* Data In   */
 549 #define ESP_CMDP  (ESP_STAT_PCD)                            /* Command   */
 550 #define ESP_STATP (ESP_STAT_PCD|ESP_STAT_PIO)               /* Status    */
 551 #define ESP_MOP   (ESP_STAT_PMSG|ESP_STAT_PCD)              /* Message Out */
 552 #define ESP_MIP   (ESP_STAT_PMSG|ESP_STAT_PCD|ESP_STAT_PIO) /* Message In */
 553
 554 /* ESP interrupt register read-only */
 555 #define ESP_INTR_S            0x01             /* Select w/o ATN */
 556 #define ESP_INTR_SATN         0x02             /* Select w/ATN */
 557 #define ESP_INTR_RSEL         0x04             /* Reselected */
 558 #define ESP_INTR_FDONE        0x08             /* Function done */
 559 #define ESP_INTR_BSERV        0x10             /* Bus service */
 560 #define ESP_INTR_DC           0x20             /* Disconnect */
 561 #define ESP_INTR_IC           0x40             /* Illegal command given */
 562 #define ESP_INTR_SR           0x80             /* SCSI bus reset detected */
 563
 564 /* Interrupt status macros */
 565 #define ESP_SRESET_IRQ(esp)  ((esp)->intreg & (ESP_INTR_SR))
 566 #define ESP_ILLCMD_IRQ(esp)  ((esp)->intreg & (ESP_INTR_IC))
 567 #define ESP_SELECT_WITH_ATN_IRQ(esp)     ((esp)->intreg & (ESP_INTR_SATN))
 568 #define ESP_SELECT_WITHOUT_ATN_IRQ(esp)  ((esp)->intreg & (ESP_INTR_S))
 569 #define ESP_SELECTION_IRQ(esp)  ((ESP_SELECT_WITH_ATN_IRQ(esp)) ||         \
 570                                  (ESP_SELECT_WITHOUT_ATN_IRQ(esp)))
 571 #define ESP_RESELECTION_IRQ(esp)         ((esp)->intreg & (ESP_INTR_RSEL))
 572
 573 /* ESP sequence step register read-only */
 574 #define ESP_STEP_VBITS        0x07             /* Valid bits */
 575 #define ESP_STEP_ASEL         0x00             /* Selection&Arbitrate cmplt */
 576 #define ESP_STEP_SID          0x01             /* One msg byte sent */
 577 #define ESP_STEP_NCMD         0x02             /* Was not in command phase */
 578 #define ESP_STEP_PPC          0x03             /* Early phase chg caused cmnd
 579                                                 * bytes to be lost
 580                                                 */
 581 #define ESP_STEP_FINI4        0x04             /* Command was sent ok */
 582
 583 /* Ho hum, some ESP's set the step register to this as well... */
 584 #define ESP_STEP_FINI5        0x05
 585 #define ESP_STEP_FINI6        0x06
 586 #define ESP_STEP_FINI7        0x07
 587 #define ESP_STEP_SOM          0x08             /* Synchronous Offset Max */
 588
 589 /* ESP chip-test register read-write */
 590 #define ESP_TEST_TARG         0x01             /* Target test mode */
 591 #define ESP_TEST_INI          0x02             /* Initiator test mode */
 592 #define ESP_TEST_TS           0x04             /* Tristate test mode */
 593
 594 /* ESP unique ID register read-only, found on fas236+fas100a+fsc only */
 595 #define ESP_UID_F100A         0x00             /* FAS100A  */
 596 #define ESP_UID_F236          0x02             /* FAS236   */
 597 #define ESP_UID_FSC           0xa2             /* NCR53CF9x-2  */
 598 #define ESP_UID_REV           0x07             /* ESP revision */
 599 #define ESP_UID_FAM           0xf8             /* ESP family   */
 600
 601 /* ESP fifo flags register read-only */
 602 /* Note that the following implies a 16 byte FIFO on the ESP. */
 603 #define ESP_FF_FBYTES         0x1f             /* Num bytes in FIFO */
 604 #define ESP_FF_ONOTZERO       0x20             /* offset ctr not zero (esp100,fsc) */
 605 #define ESP_FF_SSTEP          0xe0             /* Sequence step */
 606
 607 /* ESP clock conversion factor register write-only */
 608 #define ESP_CCF_F0            0x00             /* 35.01MHz - 40MHz */
 609 #define ESP_CCF_NEVER         0x01             /* Set it to this and die */
 610 #define ESP_CCF_F2            0x02             /* 10MHz */
 611 #define ESP_CCF_F3            0x03             /* 10.01MHz - 15MHz */
 612 #define ESP_CCF_F4            0x04             /* 15.01MHz - 20MHz */
 613 #define ESP_CCF_F5            0x05             /* 20.01MHz - 25MHz */
 614 #define ESP_CCF_F6            0x06             /* 25.01MHz - 30MHz */
 615 #define ESP_CCF_F7            0x07             /* 30.01MHz - 35MHz */
 616
 617 #define ESP_BUS_TIMEOUT        275             /* In milli-seconds */
 618 #define ESP_TIMEO_CONST       8192
 619 #define FSC_TIMEO_CONST       7668
 620 #define ESP_NEG_DEFP(mhz, cfact) \
 621         ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact)))
 622 #define FSC_NEG_DEFP(mhz, cfact) \
 623         ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (7668 * (cfact)))
 624 #define ESP_MHZ_TO_CYCLE(mhertz)  ((1000000000) / ((mhertz) / 1000))
 625 #define ESP_TICK(ccf, cycle)  ((7682 * (ccf) * (cycle) / 1000))
 626
 627
 628 extern struct proc_dir_entry proc_scsi_esp;
 629
 630 /* UGLY, UGLY, UGLY! */
 631 extern int nesps, esps_in_use, esps_running;
 632
 633 /* For our interrupt engine. */
 634 #define for_each_esp(esp) \
 635         for((esp) = espchain; (esp); (esp) = (esp)->next)
 636
 637
 638 /* External functions */
 639 extern inline void esp_cmd(struct NCR_ESP *esp, struct ESP_regs *eregs,
 640                            unchar cmd);
 641 extern struct NCR_ESP *esp_allocate(Scsi_Host_Template *, void *);
 642 extern void esp_deallocate(struct NCR_ESP *);
 643 extern void esp_release(void);
 644 extern void esp_initialize(struct NCR_ESP *);
 645 extern void esp_intr(int, void *, struct pt_regs *);
 646 #endif /* !(NCR53C9X_H) */