| aic7xxx.seq (22234) | aic7xxx.seq (22451) |
|---|---|
| 1/*+M*********************************************************************** 2 *Adaptec 274x/284x/294x device driver for Linux and FreeBSD. 3 * 4 *Copyright (c) 1994 John Aycock 5 * The University of Calgary Department of Computer Science. 6 * All rights reserved. 7 * 8 *FreeBSD, Twin, Wide, 2 command per target support, tagged queuing, --- 25 unchanged lines hidden (view full) --- 34 *OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 *HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 *LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 *OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 *SUCH DAMAGE. 39 * 40 *-M************************************************************************/ 41 | 1/*+M*********************************************************************** 2 *Adaptec 274x/284x/294x device driver for Linux and FreeBSD. 3 * 4 *Copyright (c) 1994 John Aycock 5 * The University of Calgary Department of Computer Science. 6 * All rights reserved. 7 * 8 *FreeBSD, Twin, Wide, 2 command per target support, tagged queuing, --- 25 unchanged lines hidden (view full) --- 34 *OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 *HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 *LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 *OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 *SUCH DAMAGE. 39 * 40 *-M************************************************************************/ 41 |
| 42VERSION AIC7XXX_SEQ_VER "$FreeBSD: head/sys/dev/aic7xxx/aic7xxx.seq 22234 1997-02-03 02:02:04Z gibbs $" | 42VERSION AIC7XXX_SEQ_VER "$FreeBSD: head/sys/dev/aic7xxx/aic7xxx.seq 22451 1997-02-09 03:23:28Z gibbs $" |
| 43 44#if defined(__NetBSD__) 45#include "../../../../dev/ic/aic7xxxreg.h" 46#include "../../../../scsi/scsi_message.h" 47#elif defined(__FreeBSD__) 48#include "../../dev/aic7xxx/aic7xxx_reg.h" 49#include "../../scsi/scsi_message.h" 50#endif --- 28 unchanged lines hidden (view full) --- 79 * We assume that the kernel driver may reset us at any time, even in the 80 * middle of a DMA, so clear DFCNTRL too. 81 */ 82reset: 83 clr DFCNTRL 84 clr SCSISIGO /* De-assert BSY */ 85 86p_busfree: | 43 44#if defined(__NetBSD__) 45#include "../../../../dev/ic/aic7xxxreg.h" 46#include "../../../../scsi/scsi_message.h" 47#elif defined(__FreeBSD__) 48#include "../../dev/aic7xxx/aic7xxx_reg.h" 49#include "../../scsi/scsi_message.h" 50#endif --- 28 unchanged lines hidden (view full) --- 79 * We assume that the kernel driver may reset us at any time, even in the 80 * middle of a DMA, so clear DFCNTRL too. 81 */ 82reset: 83 clr DFCNTRL 84 clr SCSISIGO /* De-assert BSY */ 85 86p_busfree: |
| 87 or SXFRCTL0, CLRCHN | |
| 88 clr SCSIRATE /* 89 * We don't know the target we will 90 * connect to, so default to narrow 91 * transfers to avoid parity problems. 92 */ | 87 clr SCSIRATE /* 88 * We don't know the target we will 89 * connect to, so default to narrow 90 * transfers to avoid parity problems. 91 */ |
| 92 and SXFRCTL0, 0xdf /* ~FAST20*/ |
|
| 93 mvi SCSISEQ,ENRSELI /* Always allow reselection */ 94 mvi LASTPHASE, P_BUSFREE 95 and FLAGS,0x07 /* clear target specific flags */ 96poll_for_work: 97 /* 98 * Are we a twin channel device? 99 * For fairness, we check the other bus first, 100 * since we just finished a transaction on the --- 185 unchanged lines hidden (view full) --- 286 mvi CLRSINT1,CLRBUSFREE 287 or SIMODE1, ENBUSFREE /* 288 * We aren't expecting a 289 * bus free, so interrupt 290 * the kernel driver if it 291 * happens. 292 */ 293/* | 93 mvi SCSISEQ,ENRSELI /* Always allow reselection */ 94 mvi LASTPHASE, P_BUSFREE 95 and FLAGS,0x07 /* clear target specific flags */ 96poll_for_work: 97 /* 98 * Are we a twin channel device? 99 * For fairness, we check the other bus first, 100 * since we just finished a transaction on the --- 185 unchanged lines hidden (view full) --- 286 mvi CLRSINT1,CLRBUSFREE 287 or SIMODE1, ENBUSFREE /* 288 * We aren't expecting a 289 * bus free, so interrupt 290 * the kernel driver if it 291 * happens. 292 */ 293/* |
| 294 * Initialize Ultra mode setting and clear the SCSI channel. 295 */ 296 or SXFRCTL0, 0x1a /* CLRSTCNT|SPIOEN|CLRCHN */ 297ultra: 298 mvi SINDEX, ULTRA_ENB_B 299 test SAVED_TCL, 0x80 jnz ultra_2 /* Target ID > 7 */ 300 test SBLKCTL, SELBUSB jnz ultra_2 /* Second channel */ 301 dec SINDEX 302ultra_2: 303 mov FUNCTION1,SAVED_TCL 304 mov A,FUNCTION1 305 test SINDIR, A jz ndx_dtr 306 or SXFRCTL0, FAST20 307 308/* |
|
| 294 * Initialize SCSIRATE with the appropriate value for this target. 295 * The SCSIRATE settings for each target are stored in an array 296 * based at TARG_SCRATCH. 297 */ 298ndx_dtr: 299 shr A,SAVED_TCL,4 300 test SBLKCTL,SELBUSB jz ndx_dtr_2 301 or SAVED_TCL, SELBUSB /* Add the channel bit while we're here */ 302 or A,0x08 /* Channel B entries add 8 */ 303ndx_dtr_2: 304 add SINDEX,TARG_SCRATCH,A 305 mov SCSIRATE,SINDIR 306 | 309 * Initialize SCSIRATE with the appropriate value for this target. 310 * The SCSIRATE settings for each target are stored in an array 311 * based at TARG_SCRATCH. 312 */ 313ndx_dtr: 314 shr A,SAVED_TCL,4 315 test SBLKCTL,SELBUSB jz ndx_dtr_2 316 or SAVED_TCL, SELBUSB /* Add the channel bit while we're here */ 317 or A,0x08 /* Channel B entries add 8 */ 318ndx_dtr_2: 319 add SINDEX,TARG_SCRATCH,A 320 mov SCSIRATE,SINDIR 321 |
| 307/* 308 * Initialize Ultra mode setting and clear the SCSI channel. 309 */ 310ultra: 311 and DINDEX,0xdf,SXFRCTL0 /* default to Ultra disabled */ 312 mvi SINDEX, ULTRA_ENB_B 313 test SAVED_TCL, 0x80 jnz ultra_2 /* Target ID > 7 */ 314 test SBLKCTL, SELBUSB jnz ultra_2 /* Second channel device */ 315 dec SINDEX 316ultra_2: 317 mov FUNCTION1,SAVED_TCL 318 mov A,FUNCTION1 319 test SINDIR, A jz set_sxfrctl0 320 or DINDEX, ULTRAEN 321 322set_sxfrctl0: 323 mov SXFRCTL0,DINDEX | |
| 324 325/* 326 * Main loop for information transfer phases. If BSY is false, then 327 * we have a bus free condition, expected or not. Otherwise, wait 328 * for the target to assert REQ before checking MSG, C/D and I/O 329 * for the bus phase. 330 * 331 */ 332ITloop: | 322 323/* 324 * Main loop for information transfer phases. If BSY is false, then 325 * we have a bus free condition, expected or not. Otherwise, wait 326 * for the target to assert REQ before checking MSG, C/D and I/O 327 * for the bus phase. 328 * 329 */ 330ITloop: |
| 331 test SSTAT1,0x9 jz ITloop /* REQINIT|BUSFREE */ |
|
| 333 test SSTAT1,BUSFREE jnz p_busfree | 332 test SSTAT1,BUSFREE jnz p_busfree |
| 334 test SSTAT1,REQINIT jz ITloop | |
| 335 336 and A,PHASE_MASK,SCSISIGI 337 mov LASTPHASE,A 338 mov SCSISIGO,A 339 340 cmp ALLZEROS,A je p_dataout 341 cmp A,P_DATAIN je p_datain 342 cmp A,P_COMMAND je p_command --- 57 unchanged lines hidden (view full) --- 400 test SG_COUNT, 0xff jnz data_phase_inbounds 401/* 402 * Turn on 'Bit Bucket' mode, set the transfer count to 403 * 16meg and let the target run until it changes phase. 404 * When the transfer completes, notify the host that we 405 * had an overrun. 406 */ 407 or SXFRCTL1,BITBUCKET | 333 334 and A,PHASE_MASK,SCSISIGI 335 mov LASTPHASE,A 336 mov SCSISIGO,A 337 338 cmp ALLZEROS,A je p_dataout 339 cmp A,P_DATAIN je p_datain 340 cmp A,P_COMMAND je p_command --- 57 unchanged lines hidden (view full) --- 398 test SG_COUNT, 0xff jnz data_phase_inbounds 399/* 400 * Turn on 'Bit Bucket' mode, set the transfer count to 401 * 16meg and let the target run until it changes phase. 402 * When the transfer completes, notify the host that we 403 * had an overrun. 404 */ 405 or SXFRCTL1,BITBUCKET |
| 408 and DMAPARAMS, 0xf7 /* Turn off HDMAEN */ 409 mvi STCNT0,0xff 410 mvi STCNT1,0xff 411 mvi STCNT2,0xff | 406 mvi HCNT0, 0xff 407 mvi HCNT1, 0xff 408 mvi HCNT2, 0xff 409 call set_stcnt_from_hcnt |
| 412 413data_phase_inbounds: 414/* If we are the last SG block, ensure wideodd is off. */ 415 cmp SG_COUNT,0x01 jne data_phase_wideodd 416 and DMAPARAMS, 0xbf /* Turn off WIDEODD */ 417data_phase_wideodd: 418 mov DMAPARAMS call dma 419 420/* Go tell the host about any overruns */ 421 test SXFRCTL1,BITBUCKET jnz data_phase_overrun 422 | 410 411data_phase_inbounds: 412/* If we are the last SG block, ensure wideodd is off. */ 413 cmp SG_COUNT,0x01 jne data_phase_wideodd 414 and DMAPARAMS, 0xbf /* Turn off WIDEODD */ 415data_phase_wideodd: 416 mov DMAPARAMS call dma 417 418/* Go tell the host about any overruns */ 419 test SXFRCTL1,BITBUCKET jnz data_phase_overrun 420 |
| 423/* Exit if we had an underrun */ 424 test SSTAT0,SDONE jz data_phase_finish /* underrun STCNT != 0 */ | 421/* Exit if we had an underrun. dma clears SINDEX in this case. */ 422 test SINDEX,0xff jz data_phase_finish |
| 425 426/* 427 * Advance the scatter-gather pointers if needed 428 */ 429sg_advance: 430 dec SG_COUNT /* one less segment to go */ 431 432 test SG_COUNT, 0xff jz data_phase_finish /* Are we done? */ --- 150 unchanged lines hidden (view full) --- 583 584 test A,MSG_IDENTIFYFLAG jnz mesgin_identify 585 cmp A,MSG_DISCONNECT je mesgin_disconnect 586 cmp A,MSG_SAVEDATAPOINTER je mesgin_sdptrs 587 cmp ALLZEROS,A je mesgin_complete 588 cmp A,MSG_RESTOREPOINTERS je mesgin_rdptrs 589 cmp A,MSG_EXTENDED je mesgin_extended 590 cmp A,MSG_MESSAGE_REJECT je mesgin_reject | 423 424/* 425 * Advance the scatter-gather pointers if needed 426 */ 427sg_advance: 428 dec SG_COUNT /* one less segment to go */ 429 430 test SG_COUNT, 0xff jz data_phase_finish /* Are we done? */ --- 150 unchanged lines hidden (view full) --- 581 582 test A,MSG_IDENTIFYFLAG jnz mesgin_identify 583 cmp A,MSG_DISCONNECT je mesgin_disconnect 584 cmp A,MSG_SAVEDATAPOINTER je mesgin_sdptrs 585 cmp ALLZEROS,A je mesgin_complete 586 cmp A,MSG_RESTOREPOINTERS je mesgin_rdptrs 587 cmp A,MSG_EXTENDED je mesgin_extended 588 cmp A,MSG_MESSAGE_REJECT je mesgin_reject |
| 589 cmp A,MSG_NOOP je mesgin_done |
|
| 591 592rej_mesgin: 593/* 594 * We have no idea what this message in is, so we issue a message reject 595 * and hope for the best. In any case, rejection should be a rare 596 * occurrence - signal the driver when it happens. 597 */ 598 mvi INTSTAT,SEND_REJECT /* let driver know */ 599 600 mvi MSG_MESSAGE_REJECT call mk_mesg 601 602mesgin_done: | 590 591rej_mesgin: 592/* 593 * We have no idea what this message in is, so we issue a message reject 594 * and hope for the best. In any case, rejection should be a rare 595 * occurrence - signal the driver when it happens. 596 */ 597 mvi INTSTAT,SEND_REJECT /* let driver know */ 598 599 mvi MSG_MESSAGE_REJECT call mk_mesg 600 601mesgin_done: |
| 603 call inb_last /*ack & turn auto PIO back on*/ | 602 call inb_last |
| 604 jmp ITloop 605 606 607mesgin_complete: 608/* 609 * We got a "command complete" message, so put the SCB_TAG into the QOUTFIFO, 610 * and trigger a completion interrupt. Before doing so, check to see if there 611 * is a residual or the status byte is something other than NO_ERROR (0). In --- 294 unchanged lines hidden (view full) --- 906 * host->scsi, or 0x39 for scsi->host. The SCSI channel is cleared 907 * during initialization. 908 */ 909dma: 910 mov DFCNTRL,SINDEX 911dma1: 912 test SSTAT0,DMADONE jnz dma3 913 test SSTAT1,PHASEMIS jz dma1 /* ie. underrun */ | 603 jmp ITloop 604 605 606mesgin_complete: 607/* 608 * We got a "command complete" message, so put the SCB_TAG into the QOUTFIFO, 609 * and trigger a completion interrupt. Before doing so, check to see if there 610 * is a residual or the status byte is something other than NO_ERROR (0). In --- 294 unchanged lines hidden (view full) --- 905 * host->scsi, or 0x39 for scsi->host. The SCSI channel is cleared 906 * during initialization. 907 */ 908dma: 909 mov DFCNTRL,SINDEX 910dma1: 911 test SSTAT0,DMADONE jnz dma3 912 test SSTAT1,PHASEMIS jz dma1 /* ie. underrun */ |
| 913 test SSTAT0,SDONE jnz dma3 914 mov SINDEX,ALLZEROS /* Notify caller of phasemiss */ |
|
| 914 915/* 916 * We will be "done" DMAing when the transfer count goes to zero, or 917 * the target changes the phase (in light of this, it makes sense that 918 * the DMA circuitry doesn't ACK when PHASEMIS is active). If we are 919 * doing a SCSI->Host transfer, the data FIFO should be flushed auto- 920 * magically on STCNT=0 or a phase change, so just wait for FIFO empty 921 * status. 922 */ 923dma3: | 915 916/* 917 * We will be "done" DMAing when the transfer count goes to zero, or 918 * the target changes the phase (in light of this, it makes sense that 919 * the DMA circuitry doesn't ACK when PHASEMIS is active). If we are 920 * doing a SCSI->Host transfer, the data FIFO should be flushed auto- 921 * magically on STCNT=0 or a phase change, so just wait for FIFO empty 922 * status. 923 */ 924dma3: |
| 924 test SINDEX,DIRECTION jnz dma5 | 925 test DFCNTRL,DIRECTION jnz dma5 |
| 925dma4: 926 test DFSTATUS,FIFOEMP jz dma4 927 928/* 929 * Now shut the DMA enables off and make sure that the DMA enables are 930 * actually off first lest we get an ILLSADDR. 931 */ 932dma5: 933 /* Don't clobber an inprogress host data transfer */ 934 test DFSTATUS, MREQPEND jnz dma5 935 /* disable DMA */ | 926dma4: 927 test DFSTATUS,FIFOEMP jz dma4 928 929/* 930 * Now shut the DMA enables off and make sure that the DMA enables are 931 * actually off first lest we get an ILLSADDR. 932 */ 933dma5: 934 /* Don't clobber an inprogress host data transfer */ 935 test DFSTATUS, MREQPEND jnz dma5 936 /* disable DMA */ |
| 936 and DFCNTRL, 0xc7 /* ~(SCSIEN|SDMAEN|HDMAEN|DIRECTION) */ | 937 and DFCNTRL, 0xc7 /* ~(SCSIEN|SDMAEN|HDMAEN) */ |
| 937dma6: | 938dma6: |
| 938 test DFCNTRL, 0x38 jnz dma6 /* (SCSIEN|SDMAEN|HDMAEN|DIRECTION) */ | 939 test DFCNTRL, 0x38 jnz dma6 /* (SCSIEN|SDMAEN|HDMAEN) */ |
| 939return: 940 ret 941 942/* 943 * Common SCSI initialization for selection and reselection. Expects 944 * the target SCSI ID to be in the upper four bits of SINDEX, and A's 945 * contents are stomped on return. 946 */ --- 208 unchanged lines hidden --- | 940return: 941 ret 942 943/* 944 * Common SCSI initialization for selection and reselection. Expects 945 * the target SCSI ID to be in the upper four bits of SINDEX, and A's 946 * contents are stomped on return. 947 */ --- 208 unchanged lines hidden --- |