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sbicreg.h revision 1.1
      1 /*	$NetBSD: sbicreg.h,v 1.1 1996/04/18 18:30:52 chuck Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Van Jacobson of Lawrence Berkeley Laboratory.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *  This product includes software developed by the University of
     21  *  California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *  @(#)scsireg.h   7.3 (Berkeley) 2/5/91
     39  */
     40 
     41 /*
     42  * WD33C93 SCSI interface hardware description.
     43  *
     44  * Using parts of the Mach scsi driver for the 33C93
     45  */
     46 
     47 #define SBIC_myid       0
     48 #define SBIC_cdbsize    0
     49 #define SBIC_control    1
     50 #define SBIC_timeo      2
     51 #define SBIC_cdb1       3
     52 #define SBIC_tsecs      3
     53 #define SBIC_cdb2       4
     54 #define SBIC_theads     4
     55 #define SBIC_cdb3       5
     56 #define SBIC_tcyl_hi    5
     57 #define SBIC_cdb4       6
     58 #define SBIC_tcyl_lo    6
     59 #define SBIC_cdb5       7
     60 #define SBIC_addr_hi    7
     61 #define SBIC_cdb6       8
     62 #define SBIC_addr_2     8
     63 #define SBIC_cdb7       9
     64 #define SBIC_addr_3     9
     65 #define SBIC_cdb8       10
     66 #define SBIC_addr_lo    10
     67 #define SBIC_cdb9       11
     68 #define SBIC_secno      11
     69 #define SBIC_cdb10      12
     70 #define SBIC_headno     12
     71 #define SBIC_cdb11      13
     72 #define SBIC_cylno_hi   13
     73 #define SBIC_cdb12      14
     74 #define SBIC_cylno_lo   14
     75 #define SBIC_tlun       15
     76 #define SBIC_cmd_phase  16
     77 #define SBIC_syn        17
     78 #define SBIC_count_hi   18
     79 #define SBIC_count_med  19
     80 #define SBIC_count_lo   20
     81 #define SBIC_selid      21
     82 #define SBIC_rselid     22
     83 #define SBIC_csr        23
     84 #define SBIC_cmd        24
     85 #define SBIC_data       25
     86 /* sbic_asr is addressed directly */
     87 
     88 /*
     89  *  Register defines
     90  */
     91 
     92 /*
     93  * Auxiliary Status Register
     94  */
     95 
     96 #define SBIC_ASR_INT            0x80    /* Interrupt pending */
     97 #define SBIC_ASR_LCI            0x40    /* Last command ignored */
     98 #define SBIC_ASR_BSY            0x20    /* Busy, only cmd/data/asr readable */
     99 #define SBIC_ASR_CIP            0x10    /* Busy, cmd unavail also */
    100 #define SBIC_ASR_xxx            0x0c
    101 #define SBIC_ASR_PE             0x02    /* Parity error (even) */
    102 #define SBIC_ASR_DBR            0x01    /* Data Buffer Ready */
    103 
    104 /*
    105  * My ID register, and/or CDB Size
    106  */
    107 
    108 #define SBIC_ID_FS_8_10         0x00    /* Input clock is  8-10 Mhz */
    109                                     /* 11 Mhz is invalid */
    110 #define SBIC_ID_FS_12_15        0x40    /* Input clock is 12-15 Mhz */
    111 #define SBIC_ID_FS_16_20        0x80    /* Input clock is 16-20 Mhz */
    112 #define SBIC_ID_EHP             0x10    /* Enable host parity */
    113 #define SBIC_ID_EAF             0x08    /* Enable Advanced Features */
    114 #define SBIC_ID_MASK            0x07
    115 #define SBIC_ID_CBDSIZE_MASK    0x0f    /* if unk SCSI cmd group */
    116 
    117 /*
    118  * Control register
    119  */
    120 
    121 #define SBIC_CTL_DMA            0x80    /* Single byte dma */
    122 #define SBIC_CTL_DBA_DMA        0x40    /* direct buffer acces (bus master)*/
    123 #define SBIC_CTL_BURST_DMA      0x20    /* continuous mode (8237) */
    124 #define SBIC_CTL_NO_DMA         0x00    /* Programmed I/O */
    125 #define SBIC_CTL_HHP            0x10    /* Halt on host parity error */
    126 #define SBIC_CTL_EDI            0x08    /* Ending disconnect interrupt */
    127 #define SBIC_CTL_IDI            0x04    /* Intermediate disconnect interrupt*/
    128 #define SBIC_CTL_HA             0x02    /* Halt on ATN */
    129 #define SBIC_CTL_HSP            0x01    /* Halt on SCSI parity error */
    130 
    131 /*
    132  * Timeout period register
    133  * [val in msecs, input clk in 0.1 Mhz]
    134  */
    135 
    136 #define SBIC_TIMEOUT(val,clk)   ((((val) * (clk)) / 800) + 1)
    137 
    138 /*
    139  * CDBn registers, note that
    140  *  cdb11 is used for status byte in target mode (send-status-and-cc)
    141  *  cdb12 sez if linked command complete, and w/flag if so
    142  */
    143 
    144 /*
    145  * Target LUN register
    146  * [holds target status when select-and-xfer]
    147  */
    148 
    149 #define SBIC_TLUN_VALID         0x80    /* did we receive an Identify msg */
    150 #define SBIC_TLUN_DOK           0x40    /* Disconnect OK */
    151 #define SBIC_TLUN_xxx           0x38
    152 #define SBIC_TLUN_MASK          0x07
    153 
    154 /*
    155  * Command Phase register
    156  */
    157 
    158 #define SBIC_CPH_MASK           0x7f    /* values/restarts are cmd specific */
    159 #define SBIC_CPH(p)             ((p) & SBIC_CPH_MASK)
    160 
    161 /*
    162  * FIFO register
    163  */
    164 
    165 #define SBIC_FIFO_DEEP          12
    166 
    167 /*
    168  * maximum possible size in TC registers. Since this is 24 bit, it's easy
    169  */
    170 #define SBIC_TC_MAX             ((1 << 24) - 1)
    171 
    172 /*
    173  * Synchronous xfer register
    174  */
    175 
    176 #define SBIC_SYN_OFF_MASK       0x0f
    177 #define SBIC_SYN_MAX_OFFSET     SBIC_FIFO_DEEP
    178 #define SBIC_SYN_PER_MASK       0x70
    179 #define SBIC_SYN_MIN_PERIOD     2       /* upto 8, encoded as 0 */
    180 
    181 #define SBIC_SYN(o,p) \
    182     (((o) & SBIC_SYN_OFF_MASK) | (((p) << 4) & SBIC_SYN_PER_MASK))
    183 
    184 /*
    185  * Transfer count register
    186  * optimal access macros depend on addressing
    187  */
    188 
    189 /*
    190  * Destination ID (selid) register
    191  */
    192 
    193 #define SBIC_SID_SCC            0x80    /* Select command chaining (tgt) */
    194 #define SBIC_SID_DPD            0x40    /* Data phase direction (inittor) */
    195 #define SBIC_SID_FROM_SCSI      0x40
    196 #define SBIC_SID_TO_SCSI        0x00
    197 #define SBIC_SID_xxx            0x38
    198 #define SBIC_SID_IDMASK         0x07
    199 
    200 /*
    201  * Source ID (rselid) register
    202  */
    203 
    204 #define SBIC_RID_ER             0x80    /* Enable reselection */
    205 #define SBIC_RID_ES             0x40    /* Enable selection */
    206 #define SBIC_RID_DSP            0x20    /* Disable select parity */
    207 #define SBIC_RID_SIV            0x08    /* Source ID valid */
    208 #define SBIC_RID_MASK           0x07
    209 
    210 /*
    211  * Status register
    212  */
    213 
    214 #define SBIC_CSR_CAUSE          0xf0
    215 #define SBIC_CSR_RESET          0x00    /* chip was reset */
    216 #define SBIC_CSR_CMD_DONE       0x10    /* cmd completed */
    217 #define SBIC_CSR_CMD_STOPPED    0x20    /* interrupted or abrted*/
    218 #define SBIC_CSR_CMD_ERR        0x40    /* end with error */
    219 #define SBIC_CSR_BUS_SERVICE    0x80    /* REQ pending on the bus */
    220 
    221 
    222 #define SBIC_CSR_QUALIFIER      0x0f
    223 /* Reset State Interrupts */
    224 #define SBIC_CSR_RESET          0x00    /* reset w/advanced features*/
    225 #define SBIC_CSR_RESET_AM       0x01    /* reset w/advanced features*/
    226 /* Successful Completion Interrupts */
    227 #define SBIC_CSR_TARGET         0x10    /* reselect complete */
    228 #define SBIC_CSR_INITIATOR      0x11    /* select complete */
    229 #define SBIC_CSR_WO_ATN         0x13    /* tgt mode completion */
    230 #define SBIC_CSR_W_ATN          0x14    /* ditto */
    231 #define SBIC_CSR_XLATED         0x15    /* translate address cmd */
    232 #define SBIC_CSR_S_XFERRED      0x16    /* initiator mode completion*/
    233 #define SBIC_CSR_XFERRED        0x18    /* phase in low bits */
    234 /* Paused or Aborted Interrupts */
    235 #define SBIC_CSR_MSGIN_W_ACK    0x20    /* (I) msgin, ACK asserted*/
    236 #define SBIC_CSR_SDP            0x21    /* (I) SDP msg received */
    237 #define SBIC_CSR_SEL_ABRT       0x22    /* sel/resel aborted */
    238 #define SBIC_CSR_XFR_PAUSED     0x23    /* (T) no ATN */
    239 #define SBIC_CSR_XFR_PAUSED_ATN 0x24    /* (T) ATN is asserted */
    240 #define SBIC_CSR_RSLT_AM        0x27    /* (I) lost selection (AM) */
    241 #define SBIC_CSR_MIS            0x28    /* (I) xfer aborted, ph mis */
    242 /* Terminated Interrupts */
    243 #define SBIC_CSR_CMD_INVALID    0x40
    244 #define SBIC_CSR_DISC           0x41    /* (I) tgt disconnected */
    245 #define SBIC_CSR_SEL_TIMEO      0x42
    246 #define SBIC_CSR_PE             0x43    /* parity error */
    247 #define SBIC_CSR_PE_ATN         0x44    /* ditto, ATN is asserted */
    248 #define SBIC_CSR_XLATE_TOOBIG   0x45
    249 #define SBIC_CSR_RSLT_NOAM      0x46    /* (I) lost sel, no AM mode */
    250 #define SBIC_CSR_BAD_STATUS     0x47    /* status byte was nok */
    251 #define SBIC_CSR_MIS_1          0x48    /* ph mis, see low bits */
    252 /* Service Required Interrupts */
    253 #define SBIC_CSR_RSLT_NI        0x80    /* reselected, no ify msg */
    254 #define SBIC_CSR_RSLT_IFY       0x81    /* ditto, AM mode, got ify */
    255 #define SBIC_CSR_SLT            0x82    /* selected, no ATN */
    256 #define SBIC_CSR_SLT_ATN        0x83    /* selected with ATN */
    257 #define SBIC_CSR_ATN            0x84    /* (T) ATN asserted */
    258 #define SBIC_CSR_DISC_1         0x85    /* (I) bus is free */
    259 #define SBIC_CSR_UNK_GROUP      0x87    /* strange CDB1 */
    260 #define SBIC_CSR_MIS_2          0x88    /* (I) ph mis, see low bits */
    261 
    262 #define SBIC_PHASE(csr)         SCSI_PHASE(csr)
    263 
    264 /*
    265  * Command register (command codes)
    266  */
    267 
    268 #define SBIC_CMD_SBT            0x80    /* Single byte xfer qualifier */
    269 #define SBIC_CMD_MASK           0x7f
    270 
    271                     /* Miscellaneous */
    272 #define SBIC_CMD_RESET          0x00    /* (DTI) lev I */
    273 #define SBIC_CMD_ABORT          0x01    /* (DTI) lev I */
    274 #define SBIC_CMD_DISC           0x04    /* ( TI) lev I */
    275 #define SBIC_CMD_SSCC           0x0d    /* ( TI) lev I */
    276 #define SBIC_CMD_SET_IDI        0x0f    /* (DTI) lev I */
    277 #define SBIC_CMD_XLATE          0x18    /* (DT ) lev II */
    278 
    279                     /* Initiator state */
    280 #define SBIC_CMD_SET_ATN        0x02    /* (  I) lev I */
    281 #define SBIC_CMD_CLR_ACK        0x03    /* (  I) lev I */
    282 #define SBIC_CMD_XFER_PAD       0x19    /* (  I) lev II */
    283 #define SBIC_CMD_XFER_INFO      0x20    /* (  I) lev II */
    284 
    285                     /* Target state */
    286 #define SBIC_CMD_SND_DISC       0x0e    /* ( T ) lev II */
    287 #define SBIC_CMD_RCV_CMD        0x10    /* ( T ) lev II */
    288 #define SBIC_CMD_RCV_DATA       0x11    /* ( T ) lev II */
    289 #define SBIC_CMD_RCV_MSG_OUT    0x12    /* ( T ) lev II */
    290 #define SBIC_CMD_RCV            0x13    /* ( T ) lev II */
    291 #define SBIC_CMD_SND_STATUS     0x14    /* ( T ) lev II */
    292 #define SBIC_CMD_SND_DATA       0x15    /* ( T ) lev II */
    293 #define SBIC_CMD_SND_MSG_IN     0x16    /* ( T ) lev II */
    294 #define SBIC_CMD_SND            0x17    /* ( T ) lev II */
    295 
    296                     /* Disconnected state */
    297 #define SBIC_CMD_RESELECT       0x05    /* (D  ) lev II */
    298 #define SBIC_CMD_SEL_ATN        0x06    /* (D  ) lev II */
    299 #define SBIC_CMD_SEL            0x07    /* (D  ) lev II */
    300 #define SBIC_CMD_SEL_ATN_XFER   0x08    /* (D I) lev II */
    301 #define SBIC_CMD_SEL_XFER       0x09    /* (D I) lev II */
    302 #define SBIC_CMD_RESELECT_RECV  0x0a    /* (DT ) lev II */
    303 #define SBIC_CMD_RESELECT_SEND  0x0b    /* (DT ) lev II */
    304 #define SBIC_CMD_WAIT_SEL_RECV  0x0c    /* (DT ) lev II */
    305 
    306 /* approximate, but we won't do SBT on selects */
    307 #define sbic_isa_select(cmd)    (((cmd) > 0x5) && ((cmd) < 0xa))
    308 
    309 #define PAD(n)  char n;
    310 #define SBIC_MACHINE_DMA_MODE   SBIC_CTL_DMA
    311 
    312 typedef struct {
    313         volatile unsigned char  sbic_asr;   /* r : Aux Status Register */
    314 #define sbic_address            sbic_asr    /* w : desired register no */
    315         volatile unsigned char  sbic_value; /* rw: register value */
    316 } sbic_padded_ind_regmap_t;
    317 typedef volatile sbic_padded_ind_regmap_t *sbic_regmap_p;
    318 
    319 #define sbic_read_reg(regs,regno,val)   \
    320     do {                                \
    321         (regs)->sbic_address = (regno); \
    322         (val) = (regs)->sbic_value;     \
    323     } while (0)
    324 
    325 #define sbic_write_reg(regs,regno,val)  \
    326     do {                                \
    327         (regs)->sbic_address = (regno); \
    328         (regs)->sbic_value = (val);     \
    329     } while (0)
    330 
    331 #define SET_SBIC_myid(regs,val)         sbic_write_reg(regs,SBIC_myid,val)
    332 #define GET_SBIC_myid(regs,val)         sbic_read_reg(regs,SBIC_myid,val)
    333 #define SET_SBIC_cdbsize(regs,val)      sbic_write_reg(regs,SBIC_cdbsize,val)
    334 #define GET_SBIC_cdbsize(regs,val)      sbic_read_reg(regs,SBIC_cdbsize,val)
    335 #define SET_SBIC_control(regs,val)      sbic_write_reg(regs,SBIC_control,val)
    336 #define GET_SBIC_control(regs,val)      sbic_read_reg(regs,SBIC_control,val)
    337 #define SET_SBIC_timeo(regs,val)        sbic_write_reg(regs,SBIC_timeo,val)
    338 #define GET_SBIC_timeo(regs,val)        sbic_read_reg(regs,SBIC_timeo,val)
    339 #define SET_SBIC_cdb1(regs,val)         sbic_write_reg(regs,SBIC_cdb1,val)
    340 #define GET_SBIC_cdb1(regs,val)         sbic_read_reg(regs,SBIC_cdb1,val)
    341 #define SET_SBIC_cdb2(regs,val)         sbic_write_reg(regs,SBIC_cdb2,val)
    342 #define GET_SBIC_cdb2(regs,val)         sbic_read_reg(regs,SBIC_cdb2,val)
    343 #define SET_SBIC_cdb3(regs,val)         sbic_write_reg(regs,SBIC_cdb3,val)
    344 #define GET_SBIC_cdb3(regs,val)         sbic_read_reg(regs,SBIC_cdb3,val)
    345 #define SET_SBIC_cdb4(regs,val)         sbic_write_reg(regs,SBIC_cdb4,val)
    346 #define GET_SBIC_cdb4(regs,val)         sbic_read_reg(regs,SBIC_cdb4,val)
    347 #define SET_SBIC_cdb5(regs,val)         sbic_write_reg(regs,SBIC_cdb5,val)
    348 #define GET_SBIC_cdb5(regs,val)         sbic_read_reg(regs,SBIC_cdb5,val)
    349 #define SET_SBIC_cdb6(regs,val)         sbic_write_reg(regs,SBIC_cdb6,val)
    350 #define GET_SBIC_cdb6(regs,val)         sbic_read_reg(regs,SBIC_cdb6,val)
    351 #define SET_SBIC_cdb7(regs,val)         sbic_write_reg(regs,SBIC_cdb7,val)
    352 #define GET_SBIC_cdb7(regs,val)         sbic_read_reg(regs,SBIC_cdb7,val)
    353 #define SET_SBIC_cdb8(regs,val)         sbic_write_reg(regs,SBIC_cdb8,val)
    354 #define GET_SBIC_cdb8(regs,val)         sbic_read_reg(regs,SBIC_cdb8,val)
    355 #define SET_SBIC_cdb9(regs,val)         sbic_write_reg(regs,SBIC_cdb9,val)
    356 #define GET_SBIC_cdb9(regs,val)         sbic_read_reg(regs,SBIC_cdb9,val)
    357 #define SET_SBIC_cdb10(regs,val)        sbic_write_reg(regs,SBIC_cdb10,val)
    358 #define GET_SBIC_cdb10(regs,val)        sbic_read_reg(regs,SBIC_cdb10,val)
    359 #define SET_SBIC_cdb11(regs,val)        sbic_write_reg(regs,SBIC_cdb11,val)
    360 #define GET_SBIC_cdb11(regs,val)        sbic_read_reg(regs,SBIC_cdb11,val)
    361 #define SET_SBIC_cdb12(regs,val)        sbic_write_reg(regs,SBIC_cdb12,val)
    362 #define GET_SBIC_cdb12(regs,val)        sbic_read_reg(regs,SBIC_cdb12,val)
    363 #define SET_SBIC_tlun(regs,val)         sbic_write_reg(regs,SBIC_tlun,val)
    364 #define GET_SBIC_tlun(regs,val)         sbic_read_reg(regs,SBIC_tlun,val)
    365 #define SET_SBIC_cmd_phase(regs,val)    sbic_write_reg(regs,SBIC_cmd_phase,val)
    366 #define GET_SBIC_cmd_phase(regs,val)    sbic_read_reg(regs,SBIC_cmd_phase,val)
    367 #define SET_SBIC_syn(regs,val)          sbic_write_reg(regs,SBIC_syn,val)
    368 #define GET_SBIC_syn(regs,val)          sbic_read_reg(regs,SBIC_syn,val)
    369 #define SET_SBIC_count_hi(regs,val)     sbic_write_reg(regs,SBIC_count_hi,val)
    370 #define GET_SBIC_count_hi(regs,val)     sbic_read_reg(regs,SBIC_count_hi,val)
    371 #define SET_SBIC_count_med(regs,val)    sbic_write_reg(regs,SBIC_count_med,val)
    372 #define GET_SBIC_count_med(regs,val)    sbic_read_reg(regs,SBIC_count_med,val)
    373 #define SET_SBIC_count_lo(regs,val)     sbic_write_reg(regs,SBIC_count_lo,val)
    374 #define GET_SBIC_count_lo(regs,val)     sbic_read_reg(regs,SBIC_count_lo,val)
    375 #define SET_SBIC_selid(regs,val)        sbic_write_reg(regs,SBIC_selid,val)
    376 #define GET_SBIC_selid(regs,val)        sbic_read_reg(regs,SBIC_selid,val)
    377 #define SET_SBIC_rselid(regs,val)       sbic_write_reg(regs,SBIC_rselid,val)
    378 #define GET_SBIC_rselid(regs,val)       sbic_read_reg(regs,SBIC_rselid,val)
    379 #define SET_SBIC_csr(regs,val)          sbic_write_reg(regs,SBIC_csr,val)
    380 #define GET_SBIC_csr(regs,val)          sbic_read_reg(regs,SBIC_csr,val)
    381 #define SET_SBIC_cmd(regs,val)          sbic_write_reg(regs,SBIC_cmd,val)
    382 #define GET_SBIC_cmd(regs,val)          sbic_read_reg(regs,SBIC_cmd,val)
    383 #define SET_SBIC_data(regs,val)         sbic_write_reg(regs,SBIC_data,val)
    384 #define GET_SBIC_data(regs,val)         sbic_read_reg(regs,SBIC_data,val)
    385 
    386 #define SBIC_TC_PUT(regs,val)                           \
    387     do {                                                \
    388         sbic_write_reg(regs,SBIC_count_hi,((val)>>16)); \
    389         (regs)->sbic_value = (val)>>8;                  \
    390         (regs)->sbic_value = (val);                     \
    391     } while (0)
    392 
    393 #define SBIC_TC_GET(regs,val)                           \
    394     do {                                                \
    395         sbic_read_reg(regs,SBIC_count_hi,(val));        \
    396         (val) = ((val)<<8) | (regs)->sbic_value;        \
    397         (val) = ((val)<<8) | (regs)->sbic_value;        \
    398     } while (0)
    399 
    400 #define SBIC_LOAD_COMMAND(regs,cmd,cmdsize)         \
    401     do {                                            \
    402         int   n   = (cmdsize) - 1;                  \
    403         char *ptr = (char *)(cmd);                  \
    404         sbic_write_reg(regs, SBIC_cdb1, *ptr++);    \
    405         while(n-- > 0) (regs)->sbic_value = *ptr++; \
    406     } while (0)
    407 
    408 #define GET_SBIC_asr(regs,val)          (val) = (regs)->sbic_asr
    409 
    410 #define WAIT_CIP(regs)                          \
    411     do {                                        \
    412         while ((regs)->sbic_asr & SBIC_ASR_CIP) \
    413             ;                                   \
    414     } while (0)
    415 
    416 /*
    417  * transmit a byte in programmed I/O mode
    418  **/
    419 #define SEND_BYTE(regs, ch)                                     \
    420     do {                                                        \
    421         WAIT_CIP(regs);                                         \
    422         SET_SBIC_cmd(regs, SBIC_CMD_SBT | SBIC_CMD_XFER_INFO);  \
    423         SBIC_WAIT(regs, SBIC_ASR_DBR, 0);                       \
    424         SET_SBIC_data(regs, ch);                                \
    425     } while (0)
    426 
    427 /*
    428  * receive a byte in programmed I/O mode
    429  */
    430 #define RECV_BYTE(regs, ch)                                     \
    431     do {                                                        \
    432         WAIT_CIP(regs);                                         \
    433         SET_SBIC_cmd(regs, SBIC_CMD_SBT | SBIC_CMD_XFER_INFO);  \
    434         SBIC_WAIT(regs, SBIC_ASR_DBR, 0);                       \
    435         GET_SBIC_data(regs, ch);                                \
    436     } while (0)
    437 
    438