diff options
Diffstat (limited to 'sys/dev/aic7xxx/aic7xxx.seq')
| -rw-r--r-- | sys/dev/aic7xxx/aic7xxx.seq | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/sys/dev/aic7xxx/aic7xxx.seq b/sys/dev/aic7xxx/aic7xxx.seq index dd177da..1d89027 100644 --- a/sys/dev/aic7xxx/aic7xxx.seq +++ b/sys/dev/aic7xxx/aic7xxx.seq @@ -32,7 +32,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: aic7xxx.seq,v 1.86 1999/03/05 23:35:48 gibbs Exp $ + * $Id: aic7xxx.seq,v 1.87 1999/03/23 07:24:28 gibbs Exp $ */ #include <dev/aic7xxx/aic7xxx.reg> @@ -1025,6 +1025,18 @@ p_mesgout: mov FUNCTION1, SCB_TCL; mov A, FUNCTION1; mov SINDEX, TARGET_MSG_REQUEST[0]; + if ((ahc->features & AHC_HS_MAILBOX) != 0) { + /* + * Work around a pausing bug in at least the aic7890. + * If the host needs to update the TARGET_MSG_REQUEST + * bit field, it will set the HS_MAILBOX to 1. In + * response, we pause with a specific interrupt code + * asking for the mask to be updated before we continue. + * Ugh. + */ + test HS_MAILBOX, 0xF0 jz . + 2; + mvi INTSTAT, UPDATE_TMSG_REQ; + } if ((ahc->features & AHC_TWIN) != 0) { /* Second Channel uses high byte bits */ test SCB_TCL, SELBUSB jz . + 2; |
