DTRT. This should be considered the base version of the file.
This commit is contained in:
briggs
parent
ffa22599dc
commit
bee422d998
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@ -1,4 +1,4 @@
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/* $NetBSD: mac68k5380.c,v 1.1 1995/09/01 03:43:49 briggs Exp $ */
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/* $NetBSD: mac68k5380.c,v 1.2 1995/09/02 03:19:37 briggs Exp $ */
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/*
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* Copyright (c) 1995 Allen Briggs
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@ -52,9 +52,6 @@
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#include "../mac68k/via.h"
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#undef splbio()
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#define splbio() splhigh()
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/*
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* Set the various driver options
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*/
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@ -165,23 +162,23 @@ machine_match(pdp, cdp, auxp, cd)
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#if USE_PDMA
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int pdma_5380_dir = 0;
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int (*pdma_xfer_fun)(void) = NULL;
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int pdma_5380_sleeping = 0;
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void (*pdma_xfer_fun)(void) = NULL;
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volatile int pdma_5380_pending = 0;
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volatile u_char *pending_5380_data;
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volatile u_long pending_5380_count;
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#define DEBUG 1 /* Maybe we try with this off eventually. */
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#define DEBUG 1 /* Maybe we try with this off eventually. */
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#if DEBUG
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int pdma_5380_sends = 0;
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int pdma_5380_bytes = 0;
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volatile char *pdma_5380_state="";
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void
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pdma_stat()
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{
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printf("PDMA SCSI: %d xfers completed, pending = %d.\n",
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pdma_5380_sends, pdma_5380_pending);
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printf("PDMA SCSI: %d xfers completed for %d bytes, pending = %d.\n",
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pdma_5380_sends, pdma_5380_bytes, pdma_5380_pending);
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printf("xfer fun = 0x%x, pdma_5380_dir = %d.\n",
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pdma_xfer_fun, pdma_5380_dir);
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printf("datap = 0x%x, remainder = %d.\n",
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@ -191,6 +188,50 @@ pdma_stat()
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#endif
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#endif
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void
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pdma_cleanup(void)
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{
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SC_REQ *reqp = connected;
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int bytes, s;
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s = splbio();
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pdma_5380_pending = 0;
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pdma_xfer_fun = NULL;
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#if DEBUG
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pdma_5380_state = "in pdma_cleanup().";
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pdma_5380_sends++;
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pdma_5380_bytes+=(reqp->xdata_len - pending_5380_count);
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#endif
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/*
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* Update pointers.
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*/
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reqp->xdata_ptr += reqp->xdata_len - pending_5380_count;
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reqp->xdata_len = pending_5380_count;
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/*
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* Reset DMA mode.
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*/
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SET_5380_REG(NCR5380_MODE, GET_5380_REG(NCR5380_MODE) & ~SC_M_DMA);
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/*
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* Tell interrupt functions that DMA has ended.
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*/
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reqp->dr_flag &= ~DRIVER_IN_DMA;
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SET_5380_REG(NCR5380_MODE, IMODE_BASE);
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SET_5380_REG(NCR5380_ICOM, 0);
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splx(s);
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/*
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* Back for more punishment.
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*/
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run_main(cur_softc);
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}
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void
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ncr5380_irq_intr(void)
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{
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@ -215,14 +256,12 @@ ncr5380_irq_intr(void)
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if ( ((GET_5380_REG(NCR5380_DMSTAT) & (0xff & ~SC_ATN_STAT))
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== SC_IRQ_SET)
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&& (GET_5380_REG(NCR5380_IDSTAT) & (SC_S_BSY|SC_S_REQ))) {
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scsi_idisable();
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scsi_clr_ipend();
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pdma_5380_pending = 0;
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if (pdma_5380_sleeping) wakeup(pdma_xfer_fun);
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pdma_cleanup();
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return;
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} else {
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scsi_show();
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panic("Spurious interrupt during PDMA xfer.\n");
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}
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scsi_show();
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panic("Spurious interrupt during PDMA xfer.\n");
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}
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if (GET_5380_REG(NCR5380_DMSTAT) & SC_IRQ_SET) {
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scsi_idisable();
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@ -238,16 +277,13 @@ ncr5380_drq_intr(void)
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#if DEBUG
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pdma_5380_state = "got drq interrupt.";
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#endif
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if (pdma_xfer_fun())
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#if DEBUG
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pdma_5380_state = "handled drq interrupt.";
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#endif
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pdma_xfer_fun();
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}
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#endif
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}
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#if USE_PDMA
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static int
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static void
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pdma_xfer_in()
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{
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/*
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@ -258,11 +294,11 @@ pdma_xfer_in()
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* and we can't know how much it transferred if the device
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* decides to disconnect on us.
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* If it does disconnect in the middle of a long xfer, it
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* should get a bus error--lovely.
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* should get a bus error--we might be able to derive from
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* that bus error where the transaction stopped, but I
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* don't want to think about that...
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*/
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while ( (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ)
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&& (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ)
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&& (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ) )
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while (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ)
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if (pending_5380_count) {
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*((u_char *) pending_5380_data)++ = *ncr_5380_with_drq;
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pending_5380_count --;
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@ -272,9 +308,11 @@ pdma_xfer_in()
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#endif
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SET_5380_REG(NCR5380_MODE,
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GET_5380_REG(NCR5380_MODE) & ~SC_M_DMA);
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return 0;
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return;
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}
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return 1;
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#if DEBUG
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pdma_5380_state = "handled drq interrupt.";
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#endif
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}
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/*
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@ -283,20 +321,17 @@ pdma_xfer_in()
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#define DONE ( (GET_5380_REG(NCR5380_DMSTAT) & SC_ACK_STAT) \
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|| (GET_5380_REG(NCR5380_IDSTAT) & SC_S_REQ) )
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static int
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static void
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pdma_xfer_out()
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{
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/*
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* See comment on pdma_xfer_in(), above.
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*/
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while ( (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ)
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&& (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ)
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&& (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ) )
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while (GET_5380_REG(NCR5380_DMSTAT) & SC_DMA_REQ)
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if (pending_5380_count) {
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*ncr_5380_with_drq = *((u_char *) pending_5380_data)++;
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pending_5380_count --;
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} else {
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scsi_idisable();
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#if DEBUG
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pdma_5380_state = "done in xfer out--waiting.";
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#endif
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@ -304,11 +339,12 @@ pdma_xfer_out()
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#if DEBUG
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pdma_5380_state = "done in xfer out--really done.";
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#endif
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pdma_5380_pending = 0;
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if (pdma_5380_sleeping) wakeup(pdma_xfer_fun);
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return 0;
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pdma_cleanup();
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return;
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}
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return 1;
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#if DEBUG
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pdma_5380_state = "handled drq interrupt.";
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#endif
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}
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#define SCSI_TIMEOUT_VAL 10000000
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@ -333,11 +369,15 @@ transfer_pdma(phasep, data, count)
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scsi_idisable();
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if (*count < 128) { /* Don't bother with PDMA for short xfers. */
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/*
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* Don't bother with PDMA for short transfers or if we can't sleep.
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*/
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if ((reqp->dr_flag & DRIVER_NOINT) || (*count < 128)) {
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#if DEBUG
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pdma_5380_state = "using transfer_pio.";
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#endif
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return transfer_pio(phasep, data, count);
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transfer_pio(phasep, data, count);
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return -1;
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}
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switch (*phasep) {
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* Match phases with target.
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*/
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SET_5380_REG(NCR5380_TCOM, *phasep);
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/*
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* We are probably already at spl2(), so this is likely a no-op.
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* Paranoia.
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*/
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s = splbio();
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/*
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* Clear pending interrupts.
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*/
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scsi_clr_ipend();
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/*
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goto scsi_timeout_error;
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}
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/*
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* Tell the driver that we're in DMA mode.
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*/
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reqp->dr_flag |= DRIVER_IN_DMA;
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/*
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* Set DMA mode and assert data bus.
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*/
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@ -390,8 +445,10 @@ transfer_pdma(phasep, data, count)
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/*
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* Set the transfer function to be called on DRQ interrupts.
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* And note that we're waiting.
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*/
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pdma_xfer_fun = (pdma_5380_dir == 1) ? pdma_xfer_out : pdma_xfer_in;
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pdma_5380_pending = 1;
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/*
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* Initiate the DMA transaction--sending or receiving.
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SET_5380_REG(NCR5380_IRCV, 0);
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}
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pdma_5380_pending = 1;
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/*
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* Now that we're set up, enable interrupts and drop processor
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* priority. We've been running at spl2 because that's what the
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* VIA2/RBV interrupts are on and we're responding to a selection
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* interrupt, here.
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* priority back down.
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*/
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scsi_ienable();
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s = spl1(); /* Allow lev 2 and above interrupts--we */
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/* were probably called from spl2(). */
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if (reqp->xs->flags & SCSI_NOSLEEP) {
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while (pdma_5380_pending);
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} else {
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pdma_5380_sleeping = 1;
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if ((err = tsleep(pdma_xfer_fun, PRIBIO,
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(pdma_5380_dir == 1) ? "pdma_out" : "pdma_in", 0))) {
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log(LOG_ERR, "pdma_xfer--error %d.\n", err);
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}
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pdma_5380_sleeping = 0;
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}
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splx(s);
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scsi_idisable();
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pdma_xfer_fun = NULL;
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#if DEBUG
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pdma_5380_state = "back from xfer.";
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pdma_5380_sends++;
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#endif
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/*
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* Send remainder back to m.i. code.
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*/
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*count = pending_5380_count;
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return 0;
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scsi_timeout_error:
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/*
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