diff options
| author | dm <dm@cvs.openbsd.org> | 1996-09-05 23:07:01 +0000 |
|---|---|---|
| committer | dm <dm@cvs.openbsd.org> | 1996-09-05 23:07:01 +0000 |
| commit | 90fa3a750d0cb28e8458c2d96c805eeeae976021 (patch) | |
| tree | e30327bfacc8bf034b7958cfa9ba741586aad4b7 /sys/dev/pci/ncr.c | |
| parent | 59436c90b065edbbd368ed8679d5be33153d4fcc (diff) | |
se@freebsd.org: some changes for the 53c860 and the 53c875
Diffstat (limited to 'sys/dev/pci/ncr.c')
| -rw-r--r-- | sys/dev/pci/ncr.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/sys/dev/pci/ncr.c b/sys/dev/pci/ncr.c index 6b95986406e..749d66e2458 100644 --- a/sys/dev/pci/ncr.c +++ b/sys/dev/pci/ncr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ncr.c,v 1.11 1996/08/21 22:27:57 deraadt Exp $ */ +/* $OpenBSD: ncr.c,v 1.12 1996/09/05 23:07:00 dm Exp $ */ /* $NetBSD: ncr.c,v 1.35.4.1 1996/06/03 20:32:17 cgd Exp $ */ /************************************************************************** @@ -1269,7 +1269,7 @@ static void ncr_complete (ncb_p np, ccb_p cp); static int ncr_delta (struct timeval * from, struct timeval * to); static void ncr_exception (ncb_p np); static void ncr_free_ccb (ncb_p np, ccb_p cp, int flags); -static void ncr_getclock (ncb_p np); +static void ncr_getclock (ncb_p np, u_char scntl3); static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long t,u_long l); static void ncr_init (ncb_p np, char * msg, u_long code); #if defined(__NetBSD__) || defined(__OpenBSD__) @@ -3540,7 +3540,7 @@ static void ncr_attach (pcici_t config_id, int unit) ** Find the right value for scntl3. */ - ncr_getclock (np); + ncr_getclock (np, INB(nc_scntl3)); /* ** Reset chip. @@ -6963,16 +6963,16 @@ static u_long ncr_lookup(char * id) #endif /* NCR_CLOCK */ -static void ncr_getclock (ncb_p np) +static void ncr_getclock (ncb_p np, u_char scntl3) { - u_char tbl[5] = {6,2,3,4,6}; + u_char tbl[6] = {6,2,3,4,6,8}; u_char f; u_char ns_clock = (1000/NCR_CLOCK); /* ** Compute the best value for scntl3. */ - +/* f = (2 * MIN_SYNC_PD - 1) / ns_clock; if (!f ) f=1; if (f>4) f=4; @@ -6987,6 +6987,24 @@ static void ncr_getclock (ncb_p np) if (DEBUG_FLAGS & DEBUG_TIMING) printf ("%s: sclk=%d async=%d sync=%d (ns) scntl3=0x%x\n", ncr_name (np), ns_clock, np->ns_async, np->ns_sync, np->rv_scntl3); +*/ + + /* + * For now just preserve the BIOS setting ... + */ + + if ((scntl3 & 7) == 0) { + scntl3 = 3; /* assume 40MHz if no value supplied by BIOS */ + } + + np->ns_sync = 25; + np->ns_async = 50; + np->rv_scntl3 = ((scntl3 & 0x7) << 4) -0x20 + (scntl3 & 0x7); + + if (bootverbose) { + printf ("\tinitial value of SCNTL3 = %02x, final = %02x\n", + scntl3, np->rv_scntl3); + } } /*=========================================================================*/ |