| aic7xxx.seq (5562) | aic7xxx.seq (5647) |
|---|---|
| 1# @(#)aic7xxx.seq 1.32 94/11/29 jda 2# | 1# @(#)aic7xxx.seq 1.32 94/11/29 jda 2# |
| 3# Adaptec 274x/284x/294x device driver for Linux. | 3# Adaptec 274x/284x/294x device driver for Linux and FreeBSD. |
| 4# Copyright (c) 1994 The University of Calgary Department of Computer Science. 5# 6# This program is free software; you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation; either version 2 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program; if not, write to the Free Software 18# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | 4# Copyright (c) 1994 The University of Calgary Department of Computer Science. 5# 6# This program is free software; you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation; either version 2 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program; if not, write to the Free Software 18# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19# |
|
| 19 | 20 |
| 20VERSION AIC7XXX_SEQ_VERSION 1.32 | 21# FreeBSD, Twin, Wide, 2 command per target support, and other optimizations 22# provided by Justin T. Gibbs (gibbs@FreeBSD.org) 23# 24# $Id$ |
| 21 | 25 |
| 26VERSION AIC7XXX_SEQ_VERSION 1.5 27 |
|
| 22SCBMASK = 0x1f 23 24SCSISEQ = 0x00 25SXFRCTL0 = 0x01 26SXFRCTL1 = 0x02 27SCSISIGI = 0x03 28SCSISIGO = 0x03 29SCSIRATE = 0x04 --- 35 unchanged lines hidden (view full) --- 65QOUTFIFO = 0x9d 66 67SCSICONF_A = 0x5a 68SCSICONF_B = 0x5b 69 70# The two reserved bytes at SCBARRAY+1[23] are expected to be set to 71# zero, and the reserved bit in SCBARRAY+0 is used as an internal flag 72# to indicate whether or not to reload scatter-gather parameters after | 28SCBMASK = 0x1f 29 30SCSISEQ = 0x00 31SXFRCTL0 = 0x01 32SXFRCTL1 = 0x02 33SCSISIGI = 0x03 34SCSISIGO = 0x03 35SCSIRATE = 0x04 --- 35 unchanged lines hidden (view full) --- 71QOUTFIFO = 0x9d 72 73SCSICONF_A = 0x5a 74SCSICONF_B = 0x5b 75 76# The two reserved bytes at SCBARRAY+1[23] are expected to be set to 77# zero, and the reserved bit in SCBARRAY+0 is used as an internal flag 78# to indicate whether or not to reload scatter-gather parameters after |
| 73# a disconnect. | 79# a disconnect. We also use bits 6 & 7 to indicate whether or not to 80# initiate SDTR or WDTR repectively when starting this command. |
| 74# 75SCBARRAY+0 = 0xa0 | 81# 82SCBARRAY+0 = 0xa0 |
| 83 84DISCONNECTED = 0x04 85NEEDDMA = 0x08 86SG_LOAD = 0x10 87NEEDSDTR = 0x40 88NEEDWDTR = 0x80 89 |
|
| 76SCBARRAY+1 = 0xa1 77SCBARRAY+2 = 0xa2 78SCBARRAY+3 = 0xa3 | 90SCBARRAY+1 = 0xa1 91SCBARRAY+2 = 0xa2 92SCBARRAY+3 = 0xa3 |
| 93SCBARRAY+4 = 0xa4 94SCBARRAY+5 = 0xa5 95SCBARRAY+6 = 0xa6 |
|
| 79SCBARRAY+7 = 0xa7 | 96SCBARRAY+7 = 0xa7 |
| 97SCBARRAY+8 = 0xa8 98SCBARRAY+9 = 0xa9 99SCBARRAY+10 = 0xaa |
|
| 80SCBARRAY+11 = 0xab | 100SCBARRAY+11 = 0xab |
| 101SCBARRAY+12 = 0xac 102SCBARRAY+13 = 0xad |
|
| 81SCBARRAY+14 = 0xae 82SCBARRAY+15 = 0xaf 83SCBARRAY+16 = 0xb0 84SCBARRAY+17 = 0xb1 85SCBARRAY+18 = 0xb2 86SCBARRAY+19 = 0xb3 87SCBARRAY+20 = 0xb4 88SCBARRAY+21 = 0xb5 89SCBARRAY+22 = 0xb6 90SCBARRAY+23 = 0xb7 91SCBARRAY+24 = 0xb8 92SCBARRAY+25 = 0xb9 | 103SCBARRAY+14 = 0xae 104SCBARRAY+15 = 0xaf 105SCBARRAY+16 = 0xb0 106SCBARRAY+17 = 0xb1 107SCBARRAY+18 = 0xb2 108SCBARRAY+19 = 0xb3 109SCBARRAY+20 = 0xb4 110SCBARRAY+21 = 0xb5 111SCBARRAY+22 = 0xb6 112SCBARRAY+23 = 0xb7 113SCBARRAY+24 = 0xb8 114SCBARRAY+25 = 0xb9 |
| 115SCBARRAY+26 = 0xba |
|
| 93 | 116 |
| 94SIGNAL_0 = 0x01 # unknown scsi bus phase 95SIGNAL_1 = 0x11 # message reject 96SIGNAL_2 = 0x21 # no IDENTIFY after reconnect 97SIGNAL_3 = 0x31 # no cmd match for reconnect 98SIGNAL_4 = 0x41 # SDTR -> SCSIRATE conversion 99STATUS_ERROR = 0x51 100SIGNAL_WDTR = 0x61 | 117BAD_PHASE = 0x01 # unknown scsi bus phase 118SEND_REJECT = 0x11 # sending a message reject 119NO_IDENT = 0x21 # no IDENTIFY after reconnect 120NO_MATCH = 0x31 # no cmd match for reconnect 121MSG_SDTR = 0x41 # SDTR message recieved 122MSG_WDTR = 0x51 # WDTR message recieved 123MSG_REJECT = 0x61 # Reject message recieved 124BAD_STATUS = 0x71 # Bad status from target |
| 101 102# The host adapter card (at least the BIOS) uses 20-2f for SCSI 103# device information, 32-33 and 5a-5f as well. As it turns out, the 104# BIOS trashes 20-2f, writing the synchronous negotiation results 105# on top of the BIOS values, so we re-use those for our per-target 106# scratchspace (actually a value that can be copied directly into 107# SCSIRATE). The kernel driver will enable synchronous negotiation 108# for all targets that have a value other than 0 in the lower four 109# bits of the target scratch space. This should work irregardless of | 125 126# The host adapter card (at least the BIOS) uses 20-2f for SCSI 127# device information, 32-33 and 5a-5f as well. As it turns out, the 128# BIOS trashes 20-2f, writing the synchronous negotiation results 129# on top of the BIOS values, so we re-use those for our per-target 130# scratchspace (actually a value that can be copied directly into 131# SCSIRATE). The kernel driver will enable synchronous negotiation 132# for all targets that have a value other than 0 in the lower four 133# bits of the target scratch space. This should work irregardless of |
| 110# whether the bios has been installed. NEEDSDTR has one bit per target 111# indicating if an SDTR message is needed for that device - this will 112# be set initially (based on a search through the target scratch space), 113# as well as after a bus reset condition. | 134# whether the bios has been installed. NEEDWDTR and NEEDSDTR are the top 135# two bits of the SCB control byte. The kernel driver will set these 136# when a WDTR or SDTR message should be sent to the target the SCB's 137# command references. |
| 114# 115# The high bit of DROPATN is set if ATN should be dropped before the ACK 116# when outb is called. REJBYTE contains the first byte of a MESSAGE IN 117# message, so the driver can report an intelligible error if a message is 118# rejected. 119# 120# FLAGS's high bit is true if we are currently handling a reselect; 121# its next-highest bit is true ONLY IF we've seen an IDENTIFY message --- 6 unchanged lines hidden (view full) --- 128# 129SYNCNEG = 0x20 130 131DROPATN = 0x30 132REJBYTE = 0x31 133DISC_DSB_A = 0x32 134DISC_DSB_B = 0x33 135 | 138# 139# The high bit of DROPATN is set if ATN should be dropped before the ACK 140# when outb is called. REJBYTE contains the first byte of a MESSAGE IN 141# message, so the driver can report an intelligible error if a message is 142# rejected. 143# 144# FLAGS's high bit is true if we are currently handling a reselect; 145# its next-highest bit is true ONLY IF we've seen an IDENTIFY message --- 6 unchanged lines hidden (view full) --- 152# 153SYNCNEG = 0x20 154 155DROPATN = 0x30 156REJBYTE = 0x31 157DISC_DSB_A = 0x32 158DISC_DSB_B = 0x33 159 |
| 136NEEDWDTR_A = 0x34 137NEEDWDTR_B = 0x35 138 | |
| 139MSG_LEN = 0x36 140MSG_START+0 = 0x37 141MSG_START+1 = 0x38 142MSG_START+2 = 0x39 143MSG_START+3 = 0x3a 144MSG_START+4 = 0x3b 145MSG_START+5 = 0x3c 146-MSG_START+0 = 0xc9 # 2's complement of MSG_START+0 147 148ARG_1 = 0x4c # sdtr conversion args & return | 160MSG_LEN = 0x36 161MSG_START+0 = 0x37 162MSG_START+1 = 0x38 163MSG_START+2 = 0x39 164MSG_START+3 = 0x3a 165MSG_START+4 = 0x3b 166MSG_START+5 = 0x3c 167-MSG_START+0 = 0xc9 # 2's complement of MSG_START+0 168 169ARG_1 = 0x4c # sdtr conversion args & return |
| 170BUS_16_BIT = 0x01 |
|
| 149RETURN_1 = 0x4c 150 151SIGSTATE = 0x4d # value written to SCSISIGO | 171RETURN_1 = 0x4c 172 173SIGSTATE = 0x4d # value written to SCSISIGO |
| 152NEEDSDTR_A = 0x4e # send SDTR message, 1 bit/trgt 153NEEDSDTR_B = 0x4f | |
| 154 | 174 |
| 155SG_SIZEOF = 0x8 # sizeof(struct scatterlist) | 175# Linux users should use 0xc (12) for SG_SIZEOF 176SG_SIZEOF = 0x8 # sizeof(struct ahc_dma) 177#SG_SIZEOF = 0xc # sizeof(struct scatterlist) 178SCB_SIZEOF = 0x13 # sizeof SCB to DMA (19 bytes) 179 |
| 156SG_NOLOAD = 0x50 # load SG pointer/length? 157SG_COUNT = 0x51 # working value of SG count 158SG_NEXT = 0x52 # working value of SG pointer 159SG_NEXT+0 = 0x52 160SG_NEXT+1 = 0x53 161SG_NEXT+2 = 0x54 162SG_NEXT+3 = 0x55 163 164SCBCOUNT = 0x56 # the actual number of SCBs 165FLAGS = 0x57 # Device configuration flags 166TWIN_BUS = 0x01 167WIDE_BUS = 0x02 | 180SG_NOLOAD = 0x50 # load SG pointer/length? 181SG_COUNT = 0x51 # working value of SG count 182SG_NEXT = 0x52 # working value of SG pointer 183SG_NEXT+0 = 0x52 184SG_NEXT+1 = 0x53 185SG_NEXT+2 = 0x54 186SG_NEXT+3 = 0x55 187 188SCBCOUNT = 0x56 # the actual number of SCBs 189FLAGS = 0x57 # Device configuration flags 190TWIN_BUS = 0x01 191WIDE_BUS = 0x02 |
| 168CHECK_DTR = 0x08 | |
| 169SENSE = 0x10 170ACTIVE_MSG = 0x20 171IDENTIFY_SEEN = 0x40 172RESELECTED = 0x80 173 174ACTIVE_A = 0x58 175ACTIVE_B = 0x59 176 --- 7 unchanged lines hidden (view full) --- 184# transaction on the current channel. 185 xor SBLKCTL,0x08 # Toggle to the other bus 186 test SCSISIGI,0x4 jnz reselect # BSYI 187 xor SBLKCTL,0x08 # Toggle to the original bus 188start2: 189 test SCSISIGI,0x4 jnz reselect # BSYI 190 test QINCNT,SCBMASK jz start 191 | 192SENSE = 0x10 193ACTIVE_MSG = 0x20 194IDENTIFY_SEEN = 0x40 195RESELECTED = 0x80 196 197ACTIVE_A = 0x58 198ACTIVE_B = 0x59 199 --- 7 unchanged lines hidden (view full) --- 207# transaction on the current channel. 208 xor SBLKCTL,0x08 # Toggle to the other bus 209 test SCSISIGI,0x4 jnz reselect # BSYI 210 xor SBLKCTL,0x08 # Toggle to the original bus 211start2: 212 test SCSISIGI,0x4 jnz reselect # BSYI 213 test QINCNT,SCBMASK jz start 214 |
| 192# We have at least one queued SCB now. Set the SCB pointer 193# from the FIFO so we see the right bank of SCB registers, 194# then set SCSI options and set the initiator and target 195# SCSI IDs. | 215# We have at least one queued SCB now. Set the SCB pointer 216# from the FIFO so we see the right bank of SCB registers, 217# then set SCSI options and set the initiator and target 218# SCSI IDs. |
| 196# 197 mov SCBPTR,QINFIFO 198 | 219# 220 mov SCBPTR,QINFIFO 221 |
| 222# If the control byte of this SCB has the NEEDDMA flag set, we have 223# yet to DMA it from host memory 224 225test SCBARRAY+0,NEEDDMA jz test_busy 226 clr HCNT+2 227 clr HCNT+1 228 mvi HCNT+0,SCB_SIZEOF 229 230 mvi A,4 231 mvi DINDEX,HADDR 232 mvi SCBARRAY+26 call bcopy 233 234 mvi DFCNTRL,0xd # HDMAEN|DIRECTION|FIFORESET 235 236# Wait for DMA from host memory to data FIFO to complete, then disable 237# DMA and wait for it to acknowledge that it's off. 238# 239scb_load1: 240 test DFSTATUS,0x8 jz scb_load1 # HDONE 241 242 clr DFCNTRL # disable DMA 243scb_load2: 244 test DFCNTRL,0x8 jnz scb_load2 # HDMAENACK 245 246# Copy the SCB from the FIFO to the SCBARRAY 247 248 mov SCBARRAY+0, DFDAT 249 mov SCBARRAY+1, DFDAT 250 mov SCBARRAY+2, DFDAT 251 mov SCBARRAY+3, DFDAT 252 mov SCBARRAY+4, DFDAT 253 mov SCBARRAY+5, DFDAT 254 mov SCBARRAY+6, DFDAT 255 mov SCBARRAY+7, DFDAT 256 mov SCBARRAY+8, DFDAT 257 mov SCBARRAY+9, DFDAT 258 mov SCBARRAY+10, DFDAT 259 mov SCBARRAY+11, DFDAT 260 mov SCBARRAY+12, DFDAT 261 mov SCBARRAY+13, DFDAT 262 mov SCBARRAY+14, DFDAT 263 mov SCBARRAY+15, DFDAT 264 mov SCBARRAY+16, DFDAT 265 mov SCBARRAY+17, DFDAT 266 mov SCBARRAY+18, DFDAT 267 and SCBARRAY+0, 0xf7 268 |
|
| 199# See if there is not already an active SCB for this target. This code 200# locks out on a per target basis instead of target/lun. Although this 201# is not ideal for devices that have multiple luns active at the same 202# time, it is faster than looping through all SCB's looking for active 203# commands. It may be benificial to make findscb a more general procedure 204# to see if the added cost of the search is negligible. This code also 205# assumes that the kernel driver will clear the active flags on board 206# initialization, board reset, and a target's SELTO. 207 | 269# See if there is not already an active SCB for this target. This code 270# locks out on a per target basis instead of target/lun. Although this 271# is not ideal for devices that have multiple luns active at the same 272# time, it is faster than looping through all SCB's looking for active 273# commands. It may be benificial to make findscb a more general procedure 274# to see if the added cost of the search is negligible. This code also 275# assumes that the kernel driver will clear the active flags on board 276# initialization, board reset, and a target's SELTO. 277 |
| 278test_busy: |
|
| 208 and FUNCTION1,0x70,SCBARRAY+1 209 mov A,FUNCTION1 210 test SCBARRAY+1,0x88 jz test_a # Id < 8 && A channel 211 212 test ACTIVE_B,A jnz requeue 213 or ACTIVE_B,A # Mark the current target as busy 214 jmp start_scb 215 --- 7 unchanged lines hidden (view full) --- 223 mov QINFIFO, SCBPTR 224 jmp start 225 226test_a: 227 test ACTIVE_A,A jnz requeue 228 or ACTIVE_A,A # Mark the current target as busy 229 230start_scb: | 279 and FUNCTION1,0x70,SCBARRAY+1 280 mov A,FUNCTION1 281 test SCBARRAY+1,0x88 jz test_a # Id < 8 && A channel 282 283 test ACTIVE_B,A jnz requeue 284 or ACTIVE_B,A # Mark the current target as busy 285 jmp start_scb 286 --- 7 unchanged lines hidden (view full) --- 294 mov QINFIFO, SCBPTR 295 jmp start 296 297test_a: 298 test ACTIVE_A,A jnz requeue 299 or ACTIVE_A,A # Mark the current target as busy 300 301start_scb: |
| 302 or SCBARRAY+0,NEEDDMA |
|
| 231 and SINDEX,0x08,SCBARRAY+1 232 and A,WIDE_BUS,FLAGS # Wide bus? 233 or SINDEX,A 234 mov SBLKCTL,SINDEX # select channel, bus width 235 mov SCBARRAY+1 call initialize 236 clr SG_NOLOAD 237 and FLAGS,0x3f # !RESELECTING 238 --- 8 unchanged lines hidden (view full) --- 247# 248 mov SCBARRAY+1 call disconnect # disconnect ok? 249 250 and SINDEX,0x7,SCBARRAY+1 # lun 251 or SINDEX,A # return value from disconnect 252 or SINDEX,0x80 call mk_mesg # IDENTIFY message 253 254 mov A,SINDEX | 303 and SINDEX,0x08,SCBARRAY+1 304 and A,WIDE_BUS,FLAGS # Wide bus? 305 or SINDEX,A 306 mov SBLKCTL,SINDEX # select channel, bus width 307 mov SCBARRAY+1 call initialize 308 clr SG_NOLOAD 309 and FLAGS,0x3f # !RESELECTING 310 --- 8 unchanged lines hidden (view full) --- 319# 320 mov SCBARRAY+1 call disconnect # disconnect ok? 321 322 and SINDEX,0x7,SCBARRAY+1 # lun 323 or SINDEX,A # return value from disconnect 324 or SINDEX,0x80 call mk_mesg # IDENTIFY message 325 326 mov A,SINDEX |
| 327 test SCBARRAY+0,0xc0 jz !message # WDTR or SDTR?? |
|
| 255 cmp MSG_START+0,A jne !message # did driver beat us? | 328 cmp MSG_START+0,A jne !message # did driver beat us? |
| 256 test FLAGS,CHECK_DTR jz !message # Don't even bother with DTR? | |
| 257 mvi MSG_START+1 call mk_dtr # build DTR message if needed 258 259!message: 260 261# Enable selection phase as an initiator, and do automatic ATN 262# after the selection. 263# 264 mvi SCSISEQ,0x48 # ENSELO|ENAUTOATNO --- 67 unchanged lines hidden (view full) --- 332 333 cmp ALLZEROS,A je p_dataout 334 cmp A,0x40 je p_datain 335 cmp A,0x80 je p_command 336 cmp A,0xc0 je p_status 337 cmp A,0xa0 je p_mesgout 338 cmp A,0xe0 je p_mesgin 339 | 329 mvi MSG_START+1 call mk_dtr # build DTR message if needed 330 331!message: 332 333# Enable selection phase as an initiator, and do automatic ATN 334# after the selection. 335# 336 mvi SCSISEQ,0x48 # ENSELO|ENAUTOATNO --- 67 unchanged lines hidden (view full) --- 404 405 cmp ALLZEROS,A je p_dataout 406 cmp A,0x40 je p_datain 407 cmp A,0x80 je p_command 408 cmp A,0xc0 je p_status 409 cmp A,0xa0 je p_mesgout 410 cmp A,0xe0 je p_mesgin 411 |
| 340 mvi INTSTAT,SIGNAL_0 # unknown - signal driver | 412 mvi INTSTAT,BAD_PHASE # unknown - signal driver |
| 341 342p_dataout: 343 mvi 0 call scsisig # !CDO|!IOO|!MSGO 344 call assert 345 call sg_load 346 347 mvi A,3 348 mvi DINDEX,HCNT --- 190 unchanged lines hidden (view full) --- 539# the old one and the sequencer code will imediately jump to start 540# working on it. If the kernel driver does not wish to request sense, 541# the sequencer program counter is incremented by 1, preventing another run 542# on the current SCB and the command is allowed to complete. We don't 543# bother to post to the QOUTFIFO in the error case since it would require 544# extra work in the kernel driver to ensure that the entry was removed 545# before the command complete code tried processing it. 546 | 413 414p_dataout: 415 mvi 0 call scsisig # !CDO|!IOO|!MSGO 416 call assert 417 call sg_load 418 419 mvi A,3 420 mvi DINDEX,HCNT --- 190 unchanged lines hidden (view full) --- 611# the old one and the sequencer code will imediately jump to start 612# working on it. If the kernel driver does not wish to request sense, 613# the sequencer program counter is incremented by 1, preventing another run 614# on the current SCB and the command is allowed to complete. We don't 615# bother to post to the QOUTFIFO in the error case since it would require 616# extra work in the kernel driver to ensure that the entry was removed 617# before the command complete code tried processing it. 618 |
| 547 test SCBARRAY+14,0xff jz status_ok # 0 Status? 548 mvi INTSTAT,STATUS_ERROR # let driver know | 619 test SCBARRAY+14,0xff jz status_ok # 0 Status? 620 mvi INTSTAT,BAD_STATUS # let driver know |
| 549 test FLAGS,SENSE jz status_ok 550 jmp p_mesgin_done 551 552status_ok: 553 554# First, mark this target as free. 555 and FUNCTION1,0x70,SCBARRAY+1 556 mov A,FUNCTION1 --- 23 unchanged lines hidden (view full) --- 580 581 cmp A,1 je p_mesginSDTR # Syncronous negotiation message 582 cmp A,3 je p_mesginWDTR # Wide negotiation message 583 jmp p_mesginN 584 585p_mesginWDTR: 586 cmp ARG_1,2 jne p_mesginN # extended mesg length = 2 587 mvi A call inb_next # Width of bus | 621 test FLAGS,SENSE jz status_ok 622 jmp p_mesgin_done 623 624status_ok: 625 626# First, mark this target as free. 627 and FUNCTION1,0x70,SCBARRAY+1 628 mov A,FUNCTION1 --- 23 unchanged lines hidden (view full) --- 652 653 cmp A,1 je p_mesginSDTR # Syncronous negotiation message 654 cmp A,3 je p_mesginWDTR # Wide negotiation message 655 jmp p_mesginN 656 657p_mesginWDTR: 658 cmp ARG_1,2 jne p_mesginN # extended mesg length = 2 659 mvi A call inb_next # Width of bus |
| 588 mvi INTSTAT,SIGNAL_WDTR # let driver know | 660 mvi INTSTAT,MSG_WDTR # let driver know |
| 589 test RETURN_1,0x80 jz p_mesgin_done# Do we need to send WDTR? 590 591# We didn't initiate the wide negotiation, so we must respond to the request 592 and RETURN_1,0x7f # Clear the SEND_WDTR Flag 593 or FLAGS,ACTIVE_MSG | 661 test RETURN_1,0x80 jz p_mesgin_done# Do we need to send WDTR? 662 663# We didn't initiate the wide negotiation, so we must respond to the request 664 and RETURN_1,0x7f # Clear the SEND_WDTR Flag 665 or FLAGS,ACTIVE_MSG |
| 666 mvi DINDEX,MSG_START+0 |
|
| 594 mvi MSG_START+0 call mk_wdtr # build WDTR message 595 or SINDEX,0x10,SIGSTATE # turn on ATNO 596 call scsisig 597 jmp p_mesgin_done 598 599p_mesginSDTR: 600 cmp ARG_1,3 jne p_mesginN # extended mesg length = 3 601 mvi ARG_1 call inb_next # xfer period 602 mvi A call inb_next # REQ/ACK offset | 667 mvi MSG_START+0 call mk_wdtr # build WDTR message 668 or SINDEX,0x10,SIGSTATE # turn on ATNO 669 call scsisig 670 jmp p_mesgin_done 671 672p_mesginSDTR: 673 cmp ARG_1,3 jne p_mesginN # extended mesg length = 3 674 mvi ARG_1 call inb_next # xfer period 675 mvi A call inb_next # REQ/ACK offset |
| 603 mvi INTSTAT,SIGNAL_4 # call driver to convert | 676 mvi INTSTAT,MSG_SDTR # call driver to convert |
| 604 605 test RETURN_1,0x80 jz p_mesgin_done# Do we need to mk_sdtr? 606 607 or FLAGS,ACTIVE_MSG | 677 678 test RETURN_1,0x80 jz p_mesgin_done# Do we need to mk_sdtr? 679 680 or FLAGS,ACTIVE_MSG |
| 681 mvi DINDEX, MSG_START+0 |
|
| 608 mvi MSG_START+0 call mk_sdtr 609 or SINDEX,0x10,SIGSTATE # turn on ATNO 610 call scsisig 611 jmp p_mesgin_done 612 613# Is it a disconnect message? Set a flag in the SCB to remind us 614# and await the bus going free. 615# --- 41 unchanged lines hidden (view full) --- 657 658 and SCBARRAY+0,0xfb # clear disconnect bit in SCB 659 or FLAGS,0xc0 # make note of IDENTIFY 660 661 call sg_scb2ram # implied restore pointers 662 # required on reselect 663 jmp p_mesgin_done 664 | 682 mvi MSG_START+0 call mk_sdtr 683 or SINDEX,0x10,SIGSTATE # turn on ATNO 684 call scsisig 685 jmp p_mesgin_done 686 687# Is it a disconnect message? Set a flag in the SCB to remind us 688# and await the bus going free. 689# --- 41 unchanged lines hidden (view full) --- 731 732 and SCBARRAY+0,0xfb # clear disconnect bit in SCB 733 or FLAGS,0xc0 # make note of IDENTIFY 734 735 call sg_scb2ram # implied restore pointers 736 # required on reselect 737 jmp p_mesgin_done 738 |
| 665# Message reject? If we have an outstanding WDTR or SDTR negotiation, assume 666# that it's a response from the target selecting 8bit or asynchronous transfer, 667# otherwise just ignore it since we have no clue what it pertains to. | 739# Message reject? Let the kernel driver handle this. If we have an 740# outstanding WDTR or SDTR negotiation, assume that it's a response from 741# the target selecting 8bit or asynchronous transfer, otherwise just ignore 742# it since we have no clue what it pertains to. |
| 668# | 743# |
| 669# XXX - I don't have a device that responds this way. Does this code 670# actually work? 671# | |
| 672p_mesgin6: 673 cmp A,7 jne p_mesgin7 # message reject code? 674 | 744p_mesgin6: 745 cmp A,7 jne p_mesgin7 # message reject code? 746 |
| 675 and FUNCTION1,0x70,SCSIID # outstanding SDTR message? 676 mov A,FUNCTION1 677 678 test SBLKCTL,0x08 jnz p_mesgin6_b 679 test SCSIID,0x80 jnz p_mesgin6_b 680 test NEEDWDTR_A,A jnz clear_wdtr_a 681 test NEEDSDTR_A,A jnz clear_sdtr_a 682 jmp p_mesgin_done # no - ignore rejection 683 684clear_sdtr_a: 685 call ndx_dtr # note use of asynch xfer 686 mov DINDEX,SINDEX 687 and DINDIR,0x80,SINDIR 688 689 not A 690 and NEEDSDTR_A,A 691 jmp clear_sdtr_done 692 693clear_wdtr_a: 694 call ndx_dtr # note use of 8bit xfer 695 mov DINDEX,SINDEX 696 and DINDIR,0x7f,SINDIR 697 698 not A 699 and NEEDWDTR_A,A 700 jmp clear_wdtr_done 701 702p_mesgin6_b: 703 test NEEDWDTR_B,A jnz clear_wdtr_b 704 test NEEDSDTR_B,A jnz clear_sdtr_b 705 jmp p_mesgin_done # no - ignore rejection 706 707clear_wdtr_b: 708 call ndx_dtr # note use of 8bit xfer 709 mov DINDEX,SINDEX 710 and DINDIR,0x7f,SINDIR 711 712 not A 713 and NEEDWDTR_B,A 714 715clear_wdtr_done: 716 and SCSIRATE,0x7f # select 8bit xfer | 747 mvi INTSTAT, MSG_REJECT |
| 717 jmp p_mesgin_done 718 | 748 jmp p_mesgin_done 749 |
| 719clear_sdtr_b: 720 call ndx_dtr # note use of asynch xfer 721 mov DINDEX,SINDEX 722 and DINDIR,0x80,SINDIR 723 724 not A 725 and NEEDSDTR_B,A 726 727clear_sdtr_done: 728 and SCSIRATE,0xf0 # select asynch xfer 729 jmp p_mesgin_done 730 | |
| 731# [ ADD MORE MESSAGE HANDLING HERE ] 732# 733p_mesgin7: 734 735# We have no idea what this message in is, and there's no way 736# to pass it up to the kernel, so we issue a message reject and 737# hope for the best. Since we're now using manual PIO mode to 738# read in the message, there should no longer be a race condition 739# present when we assert ATN. In any case, rejection should be a 740# rare occurrence - signal the driver when it happens. 741# 742p_mesginN: 743 or SINDEX,0x10,SIGSTATE # turn on ATNO 744 call scsisig | 750# [ ADD MORE MESSAGE HANDLING HERE ] 751# 752p_mesgin7: 753 754# We have no idea what this message in is, and there's no way 755# to pass it up to the kernel, so we issue a message reject and 756# hope for the best. Since we're now using manual PIO mode to 757# read in the message, there should no longer be a race condition 758# present when we assert ATN. In any case, rejection should be a 759# rare occurrence - signal the driver when it happens. 760# 761p_mesginN: 762 or SINDEX,0x10,SIGSTATE # turn on ATNO 763 call scsisig |
| 745 mvi INTSTAT,SIGNAL_1 # let driver know | 764 mvi INTSTAT,SEND_REJECT # let driver know |
| 746 747 mvi 0x7 call mk_mesg # MESSAGE REJECT message 748 749p_mesgin_done: 750 call inb_last # ack & turn auto PIO back on 751 jmp ITloop 752 753# Bus free phase. It might be useful to interrupt the device --- 205 unchanged lines hidden (view full) --- 959 960# Assert that if we've been reselected, then we've seen an IDENTIFY 961# message. 962# 963assert: 964 test FLAGS,RESELECTED jz assert1 # reselected? 965 test FLAGS,IDENTIFY_SEEN jnz assert1 # seen IDENTIFY? 966 | 765 766 mvi 0x7 call mk_mesg # MESSAGE REJECT message 767 768p_mesgin_done: 769 call inb_last # ack & turn auto PIO back on 770 jmp ITloop 771 772# Bus free phase. It might be useful to interrupt the device --- 205 unchanged lines hidden (view full) --- 978 979# Assert that if we've been reselected, then we've seen an IDENTIFY 980# message. 981# 982assert: 983 test FLAGS,RESELECTED jz assert1 # reselected? 984 test FLAGS,IDENTIFY_SEEN jnz assert1 # seen IDENTIFY? 985 |
| 967 mvi INTSTAT,SIGNAL_2 # no - cause a kernel panic | 986 mvi INTSTAT,NO_IDENT # no - cause a kernel panic |
| 968 969assert1: 970 ret 971 972# Find out if disconnection is ok from the information the BIOS has left 973# us. The tcl from SCBARRAY+1 should be in SINDEX; A will 974# contain either 0x40 (disconnection ok) or 0x00 (disconnection not ok) 975# on exit. --- 38 unchanged lines hidden (view full) --- 1014 test SCBARRAY+0,0x4 jz findSCB2 # should be disconnected 1015 ret 1016 1017findSCB2: 1018 inc SINDEX 1019 mov A,SCBCOUNT 1020 cmp SINDEX,A jne findSCB1 1021 | 987 988assert1: 989 ret 990 991# Find out if disconnection is ok from the information the BIOS has left 992# us. The tcl from SCBARRAY+1 should be in SINDEX; A will 993# contain either 0x40 (disconnection ok) or 0x00 (disconnection not ok) 994# on exit. --- 38 unchanged lines hidden (view full) --- 1033 test SCBARRAY+0,0x4 jz findSCB2 # should be disconnected 1034 ret 1035 1036findSCB2: 1037 inc SINDEX 1038 mov A,SCBCOUNT 1039 cmp SINDEX,A jne findSCB1 1040 |
| 1022 mvi INTSTAT,SIGNAL_3 # not found - signal kernel | 1041 mvi INTSTAT,NO_MATCH # not found - signal kernel |
| 1023 mvi 0x6 call mk_mesg # ABORT message 1024 1025 or SINDEX,0x10,SIGSTATE # assert ATNO 1026 call scsisig 1027 ret 1028 1029# Make a working copy of the scatter-gather parameters in the SCB. 1030# --- 17 unchanged lines hidden (view full) --- 1048 mov SCBARRAY+2,SG_COUNT 1049 1050 mvi A,4 1051 mvi DINDEX,SCBARRAY+3 1052 mvi SG_NEXT call bcopy 1053 1054 and SCBARRAY+0,0xef,SCBARRAY+0 1055 test SG_NOLOAD,0x80 jz sg_ram2scb1 # reload s/g? | 1042 mvi 0x6 call mk_mesg # ABORT message 1043 1044 or SINDEX,0x10,SIGSTATE # assert ATNO 1045 call scsisig 1046 ret 1047 1048# Make a working copy of the scatter-gather parameters in the SCB. 1049# --- 17 unchanged lines hidden (view full) --- 1067 mov SCBARRAY+2,SG_COUNT 1068 1069 mvi A,4 1070 mvi DINDEX,SCBARRAY+3 1071 mvi SG_NEXT call bcopy 1072 1073 and SCBARRAY+0,0xef,SCBARRAY+0 1074 test SG_NOLOAD,0x80 jz sg_ram2scb1 # reload s/g? |
| 1056 or SCBARRAY+0,0x10 | 1075 or SCBARRAY+0,SG_LOAD |
| 1057 1058sg_ram2scb1: 1059 ret 1060 1061# Load a struct scatter if needed and set up the data address and 1062# length. If the working value of the SG count is nonzero, then 1063# we need to load a new set of values. 1064# --- 42 unchanged lines hidden (view full) --- 1107# }; 1108# 1109 1110 mov SCBARRAY+19,DFDAT # new data address 1111 mov SCBARRAY+20,DFDAT 1112 mov SCBARRAY+21,DFDAT 1113 mov SCBARRAY+22,DFDAT 1114 | 1076 1077sg_ram2scb1: 1078 ret 1079 1080# Load a struct scatter if needed and set up the data address and 1081# length. If the working value of the SG count is nonzero, then 1082# we need to load a new set of values. 1083# --- 42 unchanged lines hidden (view full) --- 1126# }; 1127# 1128 1129 mov SCBARRAY+19,DFDAT # new data address 1130 mov SCBARRAY+20,DFDAT 1131 mov SCBARRAY+21,DFDAT 1132 mov SCBARRAY+22,DFDAT 1133 |
| 1134# For Linux, we must throw away four bytes since there is a 32bit gap 1135# in the middle of a struct scatterlist 1136# mov NONE,DFDAT 1137# mov NONE,DFDAT 1138# mov NONE,DFDAT 1139# mov NONE,DFDAT 1140 |
|
| 1115 mov SCBARRAY+23,DFDAT 1116 mov SCBARRAY+24,DFDAT | 1141 mov SCBARRAY+23,DFDAT 1142 mov SCBARRAY+24,DFDAT |
| 1117 mov SCBARRAY+25,DFDAT 1118 mov NONE,DFDAT #Only support 24 bit length. | 1143 mov SCBARRAY+25,DFDAT #Only support 24 bit length. |
| 1119 1120sg_load3: 1121 ret 1122 1123# Advance the scatter-gather pointers only IF NEEDED. If SG is enabled, 1124# and the SCSI transfer count is zero (note that this should be called 1125# right after a DMA finishes), then move the working copies of the SG 1126# pointer/length along. If the SCSI transfer count is not zero, then --- 41 unchanged lines hidden (view full) --- 1168# starting at the address passed in SINDEX. DINDEX is modified on return. 1169# The SCSI-II spec requires that Wide negotiation occur first and you can 1170# only negotiat one or the other at a time otherwise in the event of a message 1171# reject, you wouldn't be able to tell which message was the culpret. 1172# 1173mk_dtr: 1174 mov DINDEX,SINDEX # save SINDEX 1175 | 1144 1145sg_load3: 1146 ret 1147 1148# Advance the scatter-gather pointers only IF NEEDED. If SG is enabled, 1149# and the SCSI transfer count is zero (note that this should be called 1150# right after a DMA finishes), then move the working copies of the SG 1151# pointer/length along. If the SCSI transfer count is not zero, then --- 41 unchanged lines hidden (view full) --- 1193# starting at the address passed in SINDEX. DINDEX is modified on return. 1194# The SCSI-II spec requires that Wide negotiation occur first and you can 1195# only negotiat one or the other at a time otherwise in the event of a message 1196# reject, you wouldn't be able to tell which message was the culpret. 1197# 1198mk_dtr: 1199 mov DINDEX,SINDEX # save SINDEX 1200 |
| 1176 call ndx_dtr 1177 test SCBARRAY+1,0x88 jz mk_dtr_a 1178 test NEEDWDTR_B,A jnz mk_wdtr_16 # do we need negotiation? 1179 test NEEDSDTR_B,A jnz mk_sdtr 1180 ret 1181mk_dtr_a: 1182 test NEEDWDTR_A,A jnz mk_wdtr_16 # do we need negotiation? 1183 test NEEDSDTR_A,A jnz mk_sdtr 1184 ret | 1201 test SCBARRAY+0,NEEDWDTR jnz mk_wdtr_16bit 1202 jmp mk_sdtr |
| 1185 | 1203 |
| 1186mk_wdtr_16: 1187 mvi ARG_1,1 # 16bit wide bus 1188 | 1204mk_wdtr_16bit: 1205 mvi ARG_1,BUS_16_BIT |
| 1189mk_wdtr: 1190 mvi DINDIR,1 # extended message 1191 mvi DINDIR,2 # extended message length = 2 1192 mvi DINDIR,3 # WDTR code 1193 mov DINDIR,ARG_1 # bus width 1194 1195 add MSG_LEN,-MSG_START+0,DINDEX # update message length 1196 ret --- 53 unchanged lines hidden --- | 1206mk_wdtr: 1207 mvi DINDIR,1 # extended message 1208 mvi DINDIR,2 # extended message length = 2 1209 mvi DINDIR,3 # WDTR code 1210 mov DINDIR,ARG_1 # bus width 1211 1212 add MSG_LEN,-MSG_START+0,DINDEX # update message length 1213 ret --- 53 unchanged lines hidden --- |