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sbicreg.h revision 1.1
      1 /*
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Van Jacobson of Lawrence Berkeley Laboratory.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)scsireg.h	7.3 (Berkeley) 2/5/91
     37  *	$Id: sbicreg.h,v 1.1 1994/05/08 05:53:38 chopps Exp $
     38  */
     39 
     40 /*
     41  * AMD AM33C93A SCSI interface hardware description.
     42  *
     43  * Using parts of the Mach scsi driver for the 33C93
     44  */
     45 
     46 #define	SBIC_myid	0
     47 #define	SBIC_cdbsize	0
     48 #define	SBIC_control	1
     49 #define	SBIC_timeo	2
     50 #define	SBIC_cdb1	3
     51 #define	SBIC_tsecs	3
     52 #define	SBIC_cdb2	4
     53 #define	SBIC_theads	4
     54 #define	SBIC_cdb3	5
     55 #define	SBIC_tcyl_hi	5
     56 #define	SBIC_cdb4	6
     57 #define	SBIC_tcyl_lo	6
     58 #define	SBIC_cdb5	7
     59 #define	SBIC_addr_hi	7
     60 #define	SBIC_cdb6	8
     61 #define	SBIC_addr_2	8
     62 #define	SBIC_cdb7	9
     63 #define	SBIC_addr_3	9
     64 #define	SBIC_cdb8	10
     65 #define	SBIC_addr_lo	10
     66 #define	SBIC_cdb9	11
     67 #define	SBIC_secno	11
     68 #define	SBIC_cdb10	12
     69 #define	SBIC_headno	12
     70 #define	SBIC_cdb11	13
     71 #define	SBIC_cylno_hi	13
     72 #define	SBIC_cdb12	14
     73 #define	SBIC_cylno_lo	14
     74 #define	SBIC_tlun	15
     75 #define	SBIC_cmd_phase	16
     76 #define	SBIC_syn	17
     77 #define	SBIC_count_hi	18
     78 #define	SBIC_count_med	19
     79 #define	SBIC_count_lo	20
     80 #define	SBIC_selid	21
     81 #define	SBIC_rselid	22
     82 #define	SBIC_csr	23
     83 #define	SBIC_cmd	24
     84 #define	SBIC_data	25
     85 /* sbic_asr is addressed directly */
     86 
     87 /*
     88  *	Register defines
     89  */
     90 
     91 /*
     92  * Auxiliary Status Register
     93  */
     94 
     95 #define SBIC_ASR_INT		0x80	/* Interrupt pending */
     96 #define SBIC_ASR_LCI		0x40	/* Last command ignored */
     97 #define SBIC_ASR_BSY		0x20	/* Busy, only cmd/data/asr readable */
     98 #define SBIC_ASR_CIP		0x10	/* Busy, cmd unavail also */
     99 #define SBIC_ASR_xxx		0x0c
    100 #define SBIC_ASR_PE		0x02	/* Parity error (even) */
    101 #define SBIC_ASR_DBR		0x01	/* Data Buffer Ready */
    102 
    103 /*
    104  * My ID register, and/or CDB Size
    105  */
    106 
    107 #define SBIC_ID_FS_8_10		0x00	/* Input clock is  8-10 Mhz */
    108 					/* 11 Mhz is invalid */
    109 #define SBIC_ID_FS_12_15	0x40	/* Input clock is 12-15 Mhz */
    110 #define SBIC_ID_FS_16_20	0x80	/* Input clock is 16-20 Mhz */
    111 #define SBIC_ID_EHP		0x10	/* Enable host parity */
    112 #define SBIC_ID_EAF		0x08	/* Enable Advanced Features */
    113 #define SBIC_ID_MASK		0x07
    114 #define SBIC_ID_CBDSIZE_MASK	0x0f	/* if unk SCSI cmd group */
    115 
    116 /*
    117  * Control register
    118  */
    119 
    120 #define SBIC_CTL_DMA		0x80	/* Single byte dma */
    121 #define SBIC_CTL_DBA_DMA	0x40	/* direct buffer acces (bus master)*/
    122 #define SBIC_CTL_BURST_DMA	0x20	/* continuous mode (8237) */
    123 #define SBIC_CTL_NO_DMA		0x00	/* Programmed I/O */
    124 #define SBIC_CTL_HHP		0x10	/* Halt on host parity error */
    125 #define SBIC_CTL_EDI		0x08	/* Ending disconnect interrupt */
    126 #define SBIC_CTL_IDI		0x04	/* Intermediate disconnect interrupt*/
    127 #define SBIC_CTL_HA		0x02	/* Halt on ATN */
    128 #define SBIC_CTL_HSP		0x01	/* Halt on SCSI parity error */
    129 
    130 /*
    131  * Timeout period register
    132  * [val in msecs, input clk in 0.1 Mhz]
    133  */
    134 
    135 #define	SBIC_TIMEOUT(val,clk)	((((val) * (clk)) / 800) + 1)
    136 
    137 /*
    138  * CDBn registers, note that
    139  *	cdb11 is used for status byte in target mode (send-status-and-cc)
    140  *	cdb12 sez if linked command complete, and w/flag if so
    141  */
    142 
    143 /*
    144  * Target LUN register
    145  * [holds target status when select-and-xfer]
    146  */
    147 
    148 #define	SBIC_TLUN_VALID	0x80	/* did we receive an Identify msg */
    149 #define	SBIC_TLUN_DOK	0x40	/* Disconnect OK */
    150 #define	SBIC_TLUN_xxx	0x38
    151 #define	SBIC_TLUN_MASK	0x07
    152 
    153 /*
    154  * Command Phase register
    155  */
    156 
    157 #define	SBIC_CPH_MASK	0x7f	/* values/restarts are cmd specific */
    158 #define	SBIC_CPH(p)	((p) & SBIC_CPH_MASK)
    159 
    160 /*
    161  * FIFO register
    162  */
    163 
    164 #define SBIC_FIFO_DEEP	12
    165 
    166 /*
    167  * maximum possible size in TC registers. Since this is 24 bit, it's easy
    168  */
    169 #define SBIC_TC_MAX	((1 << 24) - 1)
    170 
    171 /*
    172  * Synchronous xfer register
    173  */
    174 
    175 #define	SBIC_SYN_OFF_MASK	0x0f
    176 #define	SBIC_SYN_MAX_OFFSET	SBIC_FIFO_DEEP
    177 #define	SBIC_SYN_PER_MASK	0x70
    178 #define	SBIC_SYN_MIN_PERIOD	2		/* upto 8, encoded as 0 */
    179 
    180 #define	SBIC_SYN(o,p) \
    181     (((o) & SBIC_SYN_OFF_MASK) | (((p) << 4) & SBIC_SYN_PER_MASK))
    182 
    183 /*
    184  * Transfer count register
    185  * optimal access macros depend on addressing
    186  */
    187 
    188 /*
    189  * Destination ID (selid) register
    190  */
    191 
    192 #define	SBIC_SID_SCC		0x80	/* Select command chaining (tgt) */
    193 #define	SBIC_SID_DPD		0x40	/* Data phase direction (inittor) */
    194 #define	SBIC_SID_FROM_SCSI	0x40
    195 #define	SBIC_SID_TO_SCSI	0x00
    196 #define	SBIC_SID_xxx		0x38
    197 #define	SBIC_SID_IDMASK		0x07
    198 
    199 /*
    200  * Source ID (rselid) register
    201  */
    202 
    203 #define	SBIC_RID_ER		0x80	/* Enable reselection */
    204 #define	SBIC_RID_ES		0x40	/* Enable selection */
    205 #define	SBIC_RID_DSP		0x20	/* Disable select parity */
    206 #define	SBIC_RID_SIV		0x08	/* Source ID valid */
    207 #define	SBIC_RID_MASK		0x07
    208 
    209 /*
    210  * Status register
    211  */
    212 
    213 #define	SBIC_CSR_CAUSE		0xf0
    214 #define	SBIC_CSR_RESET		0x00	/* chip was reset */
    215 #define	SBIC_CSR_CMD_DONE	0x10	/* cmd completed */
    216 #define	SBIC_CSR_CMD_STOPPED	0x20	/* interrupted or abrted*/
    217 #define	SBIC_CSR_CMD_ERR	0x40	/* end with error */
    218 #define	SBIC_CSR_BUS_SERVICE	0x80	/* REQ pending on the bus */
    219 
    220 
    221 #define	SBIC_CSR_QUALIFIER	0x0f
    222 /* Reset State Interrupts */
    223 #define	SBIC_CSR_RESET		0x00	/* reset w/advanced features*/
    224 #define	SBIC_CSR_RESET_AM	0x01	/* reset w/advanced features*/
    225 /* Successful Completion Interrupts */
    226 #define	SBIC_CSR_TARGET		0x10	/* reselect complete */
    227 #define	SBIC_CSR_INITIATOR	0x11	/* select complete */
    228 #define	SBIC_CSR_WO_ATN		0x13	/* tgt mode completion */
    229 #define	SBIC_CSR_W_ATN		0x14	/* ditto */
    230 #define	SBIC_CSR_XLATED		0x15	/* translate address cmd */
    231 #define	SBIC_CSR_S_XFERRED	0x16	/* initiator mode completion*/
    232 #define	SBIC_CSR_XFERRED	0x18	/* phase in low bits */
    233 /* Paused or Aborted Interrupts */
    234 #define	SBIC_CSR_MSGIN_W_ACK	0x20	/* (I) msgin, ACK asserted*/
    235 #define	SBIC_CSR_SDP		0x21	/* (I) SDP msg received */
    236 #define	SBIC_CSR_SEL_ABRT	0x22	/* sel/resel aborted */
    237 #define	SBIC_CSR_XFR_PAUSED	0x23	/* (T) no ATN */
    238 #define	SBIC_CSR_XFR_PAUSED_ATN	0x24	/* (T) ATN is asserted */
    239 #define	SBIC_CSR_RSLT_AM	0x27	/* (I) lost selection (AM) */
    240 #define	SBIC_CSR_MIS		0x28	/* (I) xfer aborted, ph mis */
    241 /* Terminated Interrupts */
    242 #define	SBIC_CSR_CMD_INVALID	0x40
    243 #define	SBIC_CSR_DISC		0x41	/* (I) tgt disconnected */
    244 #define	SBIC_CSR_SEL_TIMEO	0x42
    245 #define	SBIC_CSR_PE		0x43	/* parity error */
    246 #define	SBIC_CSR_PE_ATN		0x44	/* ditto, ATN is asserted */
    247 #define	SBIC_CSR_XLATE_TOOBIG	0x45
    248 #define	SBIC_CSR_RSLT_NOAM	0x46	/* (I) lost sel, no AM mode */
    249 #define	SBIC_CSR_BAD_STATUS	0x47	/* status byte was nok */
    250 #define	SBIC_CSR_MIS_1		0x48	/* ph mis, see low bits */
    251 /* Service Required Interrupts */
    252 #define	SBIC_CSR_RSLT_NI	0x80	/* reselected, no ify msg */
    253 #define	SBIC_CSR_RSLT_IFY	0x81	/* ditto, AM mode, got ify */
    254 #define	SBIC_CSR_SLT		0x82	/* selected, no ATN */
    255 #define	SBIC_CSR_SLT_ATN	0x83	/* selected with ATN */
    256 #define	SBIC_CSR_ATN		0x84	/* (T) ATN asserted */
    257 #define	SBIC_CSR_DISC_1		0x85	/* (I) bus is free */
    258 #define	SBIC_CSR_UNK_GROUP	0x87	/* strange CDB1 */
    259 #define	SBIC_CSR_MIS_2		0x88	/* (I) ph mis, see low bits */
    260 
    261 #define	SBIC_PHASE(csr)		SCSI_PHASE(csr)
    262 
    263 /*
    264  * Command register (command codes)
    265  */
    266 
    267 #define SBIC_CMD_SBT		0x80	/* Single byte xfer qualifier */
    268 #define	SBIC_CMD_MASK		0x7f
    269 
    270 					/* Miscellaneous */
    271 #define SBIC_CMD_RESET		0x00	/* (DTI) lev I */
    272 #define SBIC_CMD_ABORT		0x01	/* (DTI) lev I */
    273 #define SBIC_CMD_DISC		0x04	/* ( TI) lev I */
    274 #define SBIC_CMD_SSCC		0x0d	/* ( TI) lev I */
    275 #define SBIC_CMD_SET_IDI	0x0f	/* (DTI) lev I */
    276 #define SBIC_CMD_XLATE		0x18	/* (DT ) lev II */
    277 
    278 					/* Initiator state */
    279 #define SBIC_CMD_SET_ATN	0x02	/* (  I) lev I */
    280 #define SBIC_CMD_CLR_ACK	0x03	/* (  I) lev I */
    281 #define SBIC_CMD_XFER_PAD	0x19	/* (  I) lev II */
    282 #define SBIC_CMD_XFER_INFO	0x20	/* (  I) lev II */
    283 
    284 					/* Target state */
    285 #define SBIC_CMD_SND_DISC	0x0e	/* ( T ) lev II */
    286 #define SBIC_CMD_RCV_CMD	0x10	/* ( T ) lev II */
    287 #define SBIC_CMD_RCV_DATA	0x11	/* ( T ) lev II */
    288 #define SBIC_CMD_RCV_MSG_OUT	0x12	/* ( T ) lev II */
    289 #define SBIC_CMD_RCV		0x13	/* ( T ) lev II */
    290 #define SBIC_CMD_SND_STATUS	0x14	/* ( T ) lev II */
    291 #define SBIC_CMD_SND_DATA	0x15	/* ( T ) lev II */
    292 #define SBIC_CMD_SND_MSG_IN	0x16	/* ( T ) lev II */
    293 #define SBIC_CMD_SND		0x17	/* ( T ) lev II */
    294 
    295 					/* Disconnected state */
    296 #define SBIC_CMD_RESELECT	0x05	/* (D  ) lev II */
    297 #define SBIC_CMD_SEL_ATN	0x06	/* (D  ) lev II */
    298 #define SBIC_CMD_SEL		0x07	/* (D  ) lev II */
    299 #define SBIC_CMD_SEL_ATN_XFER	0x08	/* (D I) lev II */
    300 #define SBIC_CMD_SEL_XFER	0x09	/* (D I) lev II */
    301 #define SBIC_CMD_RESELECT_RECV	0x0a	/* (DT ) lev II */
    302 #define SBIC_CMD_RESELECT_SEND	0x0b	/* (DT ) lev II */
    303 #define SBIC_CMD_WAIT_SEL_RECV	0x0c	/* (DT ) lev II */
    304 
    305 /* approximate, but we won't do SBT on selects */
    306 #define	sbic_isa_select(cmd)	(((cmd) > 0x5) && ((cmd) < 0xa))
    307 
    308 #define PAD(n) 	char n;
    309 #define SBIC_MACHINE_DMA_MODE	SBIC_CTL_DMA
    310 
    311 typedef struct {
    312         volatile unsigned char  sbic_asr;	/* r : Aux Status Register */
    313 #define sbic_address sbic_asr			/* w : desired register no */
    314         PAD(pad1);
    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) do { \
    320 		(regs)->sbic_address = (regno);	\
    321 		(val) = (regs)->sbic_value;	\
    322 	} while (0)
    323 
    324 #define	sbic_write_reg(regs,regno,val)	do { \
    325 		(regs)->sbic_address = (regno);	\
    326 		(regs)->sbic_value = (val);	\
    327 	} while (0)
    328 
    329 #define SET_SBIC_myid(regs,val)         sbic_write_reg(regs,SBIC_myid,val)
    330 #define GET_SBIC_myid(regs,val)         sbic_read_reg(regs,SBIC_myid,val)
    331 #define SET_SBIC_cdbsize(regs,val)      sbic_write_reg(regs,SBIC_cdbsize,val)
    332 #define GET_SBIC_cdbsize(regs,val)      sbic_read_reg(regs,SBIC_cdbsize,val)
    333 #define SET_SBIC_control(regs,val)      sbic_write_reg(regs,SBIC_control,val)
    334 #define GET_SBIC_control(regs,val)      sbic_read_reg(regs,SBIC_control,val)
    335 #define SET_SBIC_timeo(regs,val)        sbic_write_reg(regs,SBIC_timeo,val)
    336 #define GET_SBIC_timeo(regs,val)        sbic_read_reg(regs,SBIC_timeo,val)
    337 #define SET_SBIC_cdb1(regs,val)         sbic_write_reg(regs,SBIC_cdb1,val)
    338 #define GET_SBIC_cdb1(regs,val)         sbic_read_reg(regs,SBIC_cdb1,val)
    339 #define SET_SBIC_cdb2(regs,val)         sbic_write_reg(regs,SBIC_cdb2,val)
    340 #define GET_SBIC_cdb2(regs,val)         sbic_read_reg(regs,SBIC_cdb2,val)
    341 #define SET_SBIC_cdb3(regs,val)         sbic_write_reg(regs,SBIC_cdb3,val)
    342 #define GET_SBIC_cdb3(regs,val)         sbic_read_reg(regs,SBIC_cdb3,val)
    343 #define SET_SBIC_cdb4(regs,val)         sbic_write_reg(regs,SBIC_cdb4,val)
    344 #define GET_SBIC_cdb4(regs,val)         sbic_read_reg(regs,SBIC_cdb4,val)
    345 #define SET_SBIC_cdb5(regs,val)         sbic_write_reg(regs,SBIC_cdb5,val)
    346 #define GET_SBIC_cdb5(regs,val)         sbic_read_reg(regs,SBIC_cdb5,val)
    347 #define SET_SBIC_cdb6(regs,val)         sbic_write_reg(regs,SBIC_cdb6,val)
    348 #define GET_SBIC_cdb6(regs,val)         sbic_read_reg(regs,SBIC_cdb6,val)
    349 #define SET_SBIC_cdb7(regs,val)         sbic_write_reg(regs,SBIC_cdb7,val)
    350 #define GET_SBIC_cdb7(regs,val)         sbic_read_reg(regs,SBIC_cdb7,val)
    351 #define SET_SBIC_cdb8(regs,val)         sbic_write_reg(regs,SBIC_cdb8,val)
    352 #define GET_SBIC_cdb8(regs,val)         sbic_read_reg(regs,SBIC_cdb8,val)
    353 #define SET_SBIC_cdb9(regs,val)         sbic_write_reg(regs,SBIC_cdb9,val)
    354 #define GET_SBIC_cdb9(regs,val)         sbic_read_reg(regs,SBIC_cdb9,val)
    355 #define SET_SBIC_cdb10(regs,val)        sbic_write_reg(regs,SBIC_cdb10,val)
    356 #define GET_SBIC_cdb10(regs,val)        sbic_read_reg(regs,SBIC_cdb10,val)
    357 #define SET_SBIC_cdb11(regs,val)        sbic_write_reg(regs,SBIC_cdb11,val)
    358 #define GET_SBIC_cdb11(regs,val)        sbic_read_reg(regs,SBIC_cdb11,val)
    359 #define SET_SBIC_cdb12(regs,val)        sbic_write_reg(regs,SBIC_cdb12,val)
    360 #define GET_SBIC_cdb12(regs,val)        sbic_read_reg(regs,SBIC_cdb12,val)
    361 #define SET_SBIC_tlun(regs,val)         sbic_write_reg(regs,SBIC_tlun,val)
    362 #define GET_SBIC_tlun(regs,val)         sbic_read_reg(regs,SBIC_tlun,val)
    363 #define SET_SBIC_cmd_phase(regs,val)    sbic_write_reg(regs,SBIC_cmd_phase,val)
    364 #define GET_SBIC_cmd_phase(regs,val)    sbic_read_reg(regs,SBIC_cmd_phase,val)
    365 #define SET_SBIC_syn(regs,val)          sbic_write_reg(regs,SBIC_syn,val)
    366 #define GET_SBIC_syn(regs,val)          sbic_read_reg(regs,SBIC_syn,val)
    367 #define SET_SBIC_count_hi(regs,val)     sbic_write_reg(regs,SBIC_count_hi,val)
    368 #define GET_SBIC_count_hi(regs,val)     sbic_read_reg(regs,SBIC_count_hi,val)
    369 #define SET_SBIC_count_med(regs,val)    sbic_write_reg(regs,SBIC_count_med,val)
    370 #define GET_SBIC_count_med(regs,val)    sbic_read_reg(regs,SBIC_count_med,val)
    371 #define SET_SBIC_count_lo(regs,val)     sbic_write_reg(regs,SBIC_count_lo,val)
    372 #define GET_SBIC_count_lo(regs,val)     sbic_read_reg(regs,SBIC_count_lo,val)
    373 #define SET_SBIC_selid(regs,val)        sbic_write_reg(regs,SBIC_selid,val)
    374 #define GET_SBIC_selid(regs,val)        sbic_read_reg(regs,SBIC_selid,val)
    375 #define SET_SBIC_rselid(regs,val)       sbic_write_reg(regs,SBIC_rselid,val)
    376 #define GET_SBIC_rselid(regs,val)       sbic_read_reg(regs,SBIC_rselid,val)
    377 #define SET_SBIC_csr(regs,val)          sbic_write_reg(regs,SBIC_csr,val)
    378 #define GET_SBIC_csr(regs,val)          sbic_read_reg(regs,SBIC_csr,val)
    379 #define SET_SBIC_cmd(regs,val)          sbic_write_reg(regs,SBIC_cmd,val)
    380 #define GET_SBIC_cmd(regs,val)          sbic_read_reg(regs,SBIC_cmd,val)
    381 #define SET_SBIC_data(regs,val)         sbic_write_reg(regs,SBIC_data,val)
    382 #define GET_SBIC_data(regs,val)         sbic_read_reg(regs,SBIC_data,val)
    383 
    384 #define SBIC_TC_PUT(regs,val) do { \
    385 	sbic_write_reg(regs,SBIC_count_hi,((val)>>16)); \
    386 	(regs)->sbic_value = (val)>>8; \
    387 	(regs)->sbic_value = (val); \
    388 } while (0)
    389 #define SBIC_TC_GET(regs,val) do { \
    390 	sbic_read_reg(regs,SBIC_count_hi,(val)); \
    391 	(val) = ((val)<<8) | (regs)->sbic_value; \
    392 	(val) = ((val)<<8) | (regs)->sbic_value; \
    393 } while (0)
    394 
    395 #define SBIC_LOAD_COMMAND(regs,cmd,cmdsize) do { \
    396 	int n=(cmdsize)-1; \
    397 	char *ptr = (char*)(cmd); \
    398 	sbic_write_reg(regs,SBIC_cdb1,*ptr++); \
    399 	while (n-- > 0) (regs)->sbic_value = *ptr++; \
    400 } while (0)
    401 
    402 #define GET_SBIC_asr(regs,val)          (val) = (regs)->sbic_asr
    403 
    404 #define WAIT_CIP(regs) do { \
    405 	while ((regs)->sbic_asr & SBIC_ASR_CIP) \
    406 		; \
    407 } while (0)
    408 
    409 /* transmit a byte in programmed I/O mode */
    410 #define SEND_BYTE(regs, ch) do { \
    411   WAIT_CIP(regs); \
    412   SET_SBIC_cmd(regs, SBIC_CMD_SBT | SBIC_CMD_XFER_INFO); \
    413   SBIC_WAIT(regs, SBIC_ASR_DBR, 0); \
    414   SET_SBIC_data(regs, ch); \
    415   } while (0)
    416 
    417 /* receive a byte in programmed I/O mode */
    418 #define RECV_BYTE(regs, ch) do { \
    419   WAIT_CIP(regs); \
    420   SET_SBIC_cmd(regs, SBIC_CMD_SBT | SBIC_CMD_XFER_INFO); \
    421   SBIC_WAIT(regs, SBIC_ASR_DBR, 0); \
    422   GET_SBIC_data(regs, ch); \
    423   } while (0)
    424