1 /* $NetBSD: sbicreg.h,v 1.8 2010/02/05 12:13:36 phx 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)scsireg.h 7.3 (Berkeley) 2/5/91 35 */ 36 37 /* 38 * AMD AM33C93A SCSI interface hardware description. 39 * 40 * Using parts of the Mach scsi driver for the 33C93 41 */ 42 43 #define SBIC_myid 0 44 #define SBIC_cdbsize 0 45 #define SBIC_control 1 46 #define SBIC_timeo 2 47 #define SBIC_cdb1 3 48 #define SBIC_tsecs 3 49 #define SBIC_cdb2 4 50 #define SBIC_theads 4 51 #define SBIC_cdb3 5 52 #define SBIC_tcyl_hi 5 53 #define SBIC_cdb4 6 54 #define SBIC_tcyl_lo 6 55 #define SBIC_cdb5 7 56 #define SBIC_addr_hi 7 57 #define SBIC_cdb6 8 58 #define SBIC_addr_2 8 59 #define SBIC_cdb7 9 60 #define SBIC_addr_3 9 61 #define SBIC_cdb8 10 62 #define SBIC_addr_lo 10 63 #define SBIC_cdb9 11 64 #define SBIC_secno 11 65 #define SBIC_cdb10 12 66 #define SBIC_headno 12 67 #define SBIC_cdb11 13 68 #define SBIC_cylno_hi 13 69 #define SBIC_cdb12 14 70 #define SBIC_cylno_lo 14 71 #define SBIC_tlun 15 72 #define SBIC_cmd_phase 16 73 #define SBIC_syn 17 74 #define SBIC_count_hi 18 75 #define SBIC_count_med 19 76 #define SBIC_count_lo 20 77 #define SBIC_selid 21 78 #define SBIC_rselid 22 79 #define SBIC_csr 23 80 #define SBIC_cmd 24 81 #define SBIC_data 25 82 /* sbic_asr is addressed directly */ 83 84 /* 85 * Register defines 86 */ 87 88 /* 89 * Auxiliary Status Register 90 */ 91 92 #define SBIC_ASR_INT 0x80 /* Interrupt pending */ 93 #define SBIC_ASR_LCI 0x40 /* Last command ignored */ 94 #define SBIC_ASR_BSY 0x20 /* Busy, only cmd/data/asr readable */ 95 #define SBIC_ASR_CIP 0x10 /* Busy, cmd unavail also */ 96 #define SBIC_ASR_xxx 0x0c 97 #define SBIC_ASR_PE 0x02 /* Parity error (even) */ 98 #define SBIC_ASR_DBR 0x01 /* Data Buffer Ready */ 99 100 /* 101 * My ID register, and/or CDB Size 102 */ 103 104 #define SBIC_ID_FS_8_10 0x00 /* Input clock is 8-10 MHz */ 105 /* 11 MHz is invalid */ 106 #define SBIC_ID_FS_12_15 0x40 /* Input clock is 12-15 MHz */ 107 #define SBIC_ID_FS_16_20 0x80 /* Input clock is 16-20 MHz */ 108 #define SBIC_ID_EHP 0x10 /* Enable host parity */ 109 #define SBIC_ID_EAF 0x08 /* Enable Advanced Features */ 110 #define SBIC_ID_MASK 0x07 111 #define SBIC_ID_CBDSIZE_MASK 0x0f /* if unk SCSI cmd group */ 112 113 /* 114 * Control register 115 */ 116 117 #define SBIC_CTL_DMA 0x80 /* Single byte dma */ 118 #define SBIC_CTL_DBA_DMA 0x40 /* direct buffer acces (bus master)*/ 119 #define SBIC_CTL_BURST_DMA 0x20 /* continuous mode (8237) */ 120 #define SBIC_CTL_NO_DMA 0x00 /* Programmed I/O */ 121 #define SBIC_CTL_HHP 0x10 /* Halt on host parity error */ 122 #define SBIC_CTL_EDI 0x08 /* Ending disconnect interrupt */ 123 #define SBIC_CTL_IDI 0x04 /* Intermediate disconnect interrupt*/ 124 #define SBIC_CTL_HA 0x02 /* Halt on ATN */ 125 #define SBIC_CTL_HSP 0x01 /* Halt on SCSI parity error */ 126 127 /* 128 * Timeout period register 129 * [val in msecs, input clk in 0.1 MHz] 130 */ 131 132 #define SBIC_TIMEOUT(val,clk) ((((val) * (clk)) / 800) + 1) 133 134 /* 135 * CDBn registers, note that 136 * cdb11 is used for status byte in target mode (send-status-and-cc) 137 * cdb12 sez if linked command complete, and w/flag if so 138 */ 139 140 /* 141 * Target LUN register 142 * [holds target status when select-and-xfer] 143 */ 144 145 #define SBIC_TLUN_VALID 0x80 /* did we receive an Identify msg */ 146 #define SBIC_TLUN_DOK 0x40 /* Disconnect OK */ 147 #define SBIC_TLUN_xxx 0x38 148 #define SBIC_TLUN_MASK 0x07 149 150 /* 151 * Command Phase register 152 */ 153 154 #define SBIC_CPH_MASK 0x7f /* values/restarts are cmd specific */ 155 #define SBIC_CPH(p) ((p) & SBIC_CPH_MASK) 156 157 /* 158 * FIFO register 159 */ 160 161 #define SBIC_FIFO_DEEP 12 162 163 /* 164 * maximum possible size in TC registers. Since this is 24 bit, it's easy 165 */ 166 #define SBIC_TC_MAX ((1 << 24) - 1) 167 168 /* 169 * Synchronous xfer register 170 */ 171 172 #define SBIC_SYN_OFF_MASK 0x0f 173 #define SBIC_SYN_MAX_OFFSET SBIC_FIFO_DEEP 174 #define SBIC_SYN_PER_MASK 0x70 175 #define SBIC_SYN_MIN_PERIOD 2 /* upto 8, encoded as 0 */ 176 177 #define SBIC_SYN(o,p) \ 178 (((o) & SBIC_SYN_OFF_MASK) | (((p) << 4) & SBIC_SYN_PER_MASK)) 179 180 /* 181 * Transfer count register 182 * optimal access macros depend on addressing 183 */ 184 185 /* 186 * Destination ID (selid) register 187 */ 188 189 #define SBIC_SID_SCC 0x80 /* Select command chaining (tgt) */ 190 #define SBIC_SID_DPD 0x40 /* Data phase direction (inittor) */ 191 #define SBIC_SID_FROM_SCSI 0x40 192 #define SBIC_SID_TO_SCSI 0x00 193 #define SBIC_SID_xxx 0x38 194 #define SBIC_SID_IDMASK 0x07 195 196 /* 197 * Source ID (rselid) register 198 */ 199 200 #define SBIC_RID_ER 0x80 /* Enable reselection */ 201 #define SBIC_RID_ES 0x40 /* Enable selection */ 202 #define SBIC_RID_DSP 0x20 /* Disable select parity */ 203 #define SBIC_RID_SIV 0x08 /* Source ID valid */ 204 #define SBIC_RID_MASK 0x07 205 206 /* 207 * Status register 208 */ 209 210 #define SBIC_CSR_CAUSE 0xf0 211 #define SBIC_CSR_RESET 0x00 /* chip was reset */ 212 #define SBIC_CSR_CMD_DONE 0x10 /* cmd completed */ 213 #define SBIC_CSR_CMD_STOPPED 0x20 /* interrupted or abrted*/ 214 #define SBIC_CSR_CMD_ERR 0x40 /* end with error */ 215 #define SBIC_CSR_BUS_SERVICE 0x80 /* REQ pending on the bus */ 216 217 218 #define SBIC_CSR_QUALIFIER 0x0f 219 /* Reset State Interrupts */ 220 #define SBIC_CSR_RESET 0x00 /* reset w/advanced features*/ 221 #define SBIC_CSR_RESET_AM 0x01 /* reset w/advanced features*/ 222 /* Successful Completion Interrupts */ 223 #define SBIC_CSR_TARGET 0x10 /* reselect complete */ 224 #define SBIC_CSR_INITIATOR 0x11 /* select complete */ 225 #define SBIC_CSR_WO_ATN 0x13 /* tgt mode completion */ 226 #define SBIC_CSR_W_ATN 0x14 /* ditto */ 227 #define SBIC_CSR_XLATED 0x15 /* translate address cmd */ 228 #define SBIC_CSR_S_XFERRED 0x16 /* initiator mode completion*/ 229 #define SBIC_CSR_XFERRED 0x18 /* phase in low bits */ 230 /* Paused or Aborted Interrupts */ 231 #define SBIC_CSR_MSGIN_W_ACK 0x20 /* (I) msgin, ACK asserted*/ 232 #define SBIC_CSR_SDP 0x21 /* (I) SDP msg received */ 233 #define SBIC_CSR_SEL_ABRT 0x22 /* sel/resel aborted */ 234 #define SBIC_CSR_XFR_PAUSED 0x23 /* (T) no ATN */ 235 #define SBIC_CSR_XFR_PAUSED_ATN 0x24 /* (T) ATN is asserted */ 236 #define SBIC_CSR_RSLT_AM 0x27 /* (I) lost selection (AM) */ 237 #define SBIC_CSR_MIS 0x28 /* (I) xfer aborted, ph mis */ 238 /* Terminated Interrupts */ 239 #define SBIC_CSR_CMD_INVALID 0x40 240 #define SBIC_CSR_DISC 0x41 /* (I) tgt disconnected */ 241 #define SBIC_CSR_SEL_TIMEO 0x42 242 #define SBIC_CSR_PE 0x43 /* parity error */ 243 #define SBIC_CSR_PE_ATN 0x44 /* ditto, ATN is asserted */ 244 #define SBIC_CSR_XLATE_TOOBIG 0x45 245 #define SBIC_CSR_RSLT_NOAM 0x46 /* (I) lost sel, no AM mode */ 246 #define SBIC_CSR_BAD_STATUS 0x47 /* status byte was nok */ 247 #define SBIC_CSR_MIS_1 0x48 /* ph mis, see low bits */ 248 /* Service Required Interrupts */ 249 #define SBIC_CSR_RSLT_NI 0x80 /* reselected, no ify msg */ 250 #define SBIC_CSR_RSLT_IFY 0x81 /* ditto, AM mode, got ify */ 251 #define SBIC_CSR_SLT 0x82 /* selected, no ATN */ 252 #define SBIC_CSR_SLT_ATN 0x83 /* selected with ATN */ 253 #define SBIC_CSR_ATN 0x84 /* (T) ATN asserted */ 254 #define SBIC_CSR_DISC_1 0x85 /* (I) bus is free */ 255 #define SBIC_CSR_UNK_GROUP 0x87 /* strange CDB1 */ 256 #define SBIC_CSR_MIS_2 0x88 /* (I) ph mis, see low bits */ 257 258 #define SBIC_PHASE(csr) SCSI_PHASE(csr) 259 260 /* 261 * Command register (command codes) 262 */ 263 264 #define SBIC_CMD_SBT 0x80 /* Single byte xfer qualifier */ 265 #define SBIC_CMD_MASK 0x7f 266 267 /* Miscellaneous */ 268 #define SBIC_CMD_RESET 0x00 /* (DTI) lev I */ 269 #define SBIC_CMD_ABORT 0x01 /* (DTI) lev I */ 270 #define SBIC_CMD_DISC 0x04 /* ( TI) lev I */ 271 #define SBIC_CMD_SSCC 0x0d /* ( TI) lev I */ 272 #define SBIC_CMD_SET_IDI 0x0f /* (DTI) lev I */ 273 #define SBIC_CMD_XLATE 0x18 /* (DT ) lev II */ 274 275 /* Initiator state */ 276 #define SBIC_CMD_SET_ATN 0x02 /* ( I) lev I */ 277 #define SBIC_CMD_CLR_ACK 0x03 /* ( I) lev I */ 278 #define SBIC_CMD_XFER_PAD 0x19 /* ( I) lev II */ 279 #define SBIC_CMD_XFER_INFO 0x20 /* ( I) lev II */ 280 281 /* Target state */ 282 #define SBIC_CMD_SND_DISC 0x0e /* ( T ) lev II */ 283 #define SBIC_CMD_RCV_CMD 0x10 /* ( T ) lev II */ 284 #define SBIC_CMD_RCV_DATA 0x11 /* ( T ) lev II */ 285 #define SBIC_CMD_RCV_MSG_OUT 0x12 /* ( T ) lev II */ 286 #define SBIC_CMD_RCV 0x13 /* ( T ) lev II */ 287 #define SBIC_CMD_SND_STATUS 0x14 /* ( T ) lev II */ 288 #define SBIC_CMD_SND_DATA 0x15 /* ( T ) lev II */ 289 #define SBIC_CMD_SND_MSG_IN 0x16 /* ( T ) lev II */ 290 #define SBIC_CMD_SND 0x17 /* ( T ) lev II */ 291 292 /* Disconnected state */ 293 #define SBIC_CMD_RESELECT 0x05 /* (D ) lev II */ 294 #define SBIC_CMD_SEL_ATN 0x06 /* (D ) lev II */ 295 #define SBIC_CMD_SEL 0x07 /* (D ) lev II */ 296 #define SBIC_CMD_SEL_ATN_XFER 0x08 /* (D I) lev II */ 297 #define SBIC_CMD_SEL_XFER 0x09 /* (D I) lev II */ 298 #define SBIC_CMD_RESELECT_RECV 0x0a /* (DT ) lev II */ 299 #define SBIC_CMD_RESELECT_SEND 0x0b /* (DT ) lev II */ 300 #define SBIC_CMD_WAIT_SEL_RECV 0x0c /* (DT ) lev II */ 301 302 /* approximate, but we won't do SBT on selects */ 303 #define sbic_isa_select(cmd) (((cmd) > 0x5) && ((cmd) < 0xa)) 304 305 #define PAD(n) char n; 306 #define SBIC_MACHINE_DMA_MODE SBIC_CTL_DMA 307 308 typedef struct { 309 volatile unsigned char *sbic_asr_p; /* r : Aux Status Register */ 310 #define sbic_address_p sbic_asr_p /* w : desired register no */ 311 volatile unsigned char *sbic_value_p; /* rw: register value */ 312 } sbic_regmap_t; 313 typedef sbic_regmap_t *sbic_regmap_p; 314 315 #define sbic_read_reg(regs,regno,val) do { \ 316 *((regs).sbic_address_p) = (regno); \ 317 amiga_membarrier(); \ 318 (val) = *((regs).sbic_value_p); \ 319 amiga_membarrier(); \ 320 } while (0) 321 322 #define sbic_write_reg(regs,regno,val) do { \ 323 *((regs).sbic_address_p) = (regno); \ 324 amiga_membarrier(); \ 325 *((regs).sbic_value_p) = (val); \ 326 amiga_membarrier(); \ 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_p) = (val)>>8; \ 387 *((regs).sbic_value_p) = (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_p); \ 392 (val) = ((val)<<8) | *((regs).sbic_value_p); \ 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_p) = *ptr++; \ 400 } while (0) 401 402 #define GET_SBIC_asr(regs,val) (val) = *((regs).sbic_asr_p) 403 404 #define WAIT_CIP(regs) do { \ 405 while (*((regs).sbic_asr_p) & 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