From: James Bottomley <James.Bottomley@steeleye.com>
Date: Tue, 14 Jun 2005 01:58:56 +0000 (-0500)
Subject: [SCSI] aic7xxx: fix the BIOS limits setting routines
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=12021fff2bae7fab01c4bf283f3cd9bc6997d8c4;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[SCSI] aic7xxx: fix the BIOS limits setting routines

Following the go around over the SONY DVD that needs artificial limits,
this should be the correct code for all cases (minus the debugging
prints).

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index 55e0b2875f9..e3892585d7e 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -621,20 +621,35 @@ ahc_linux_target_alloc(struct scsi_target *starget)
 	memset(targ, 0, sizeof(*targ));
 
 	if (sc) {
+		int maxsync = AHC_SYNCRATE_DT;
+		int ultra = 0;
+		int flags = sc->device_flags[target_offset];
+
+		if (ahc->flags & AHC_NEWEEPROM_FMT) {
+		    if (flags & CFSYNCHISULTRA)
+			ultra = 1;
+		} else if (flags & CFULTRAEN)
+			ultra = 1;
+		/* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
+		 * change it to ultra=0, CFXFER = 0 */
+		if(ultra && (flags & CFXFER) == 0x04) {
+			ultra = 0;
+			flags &= ~CFXFER;
+		}
+	    
 		if ((ahc->features & AHC_ULTRA2) != 0) {
-			scsirate = sc->device_flags[target_offset] & CFXFER;
+			scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
 		} else {
-			scsirate = (sc->device_flags[target_offset] & CFXFER) << 4;
-			if (sc->device_flags[target_offset] & CFSYNCH)
-				scsirate |= SOFS;
+			scsirate = (flags & CFXFER) << 4;
+			maxsync = ultra ? AHC_SYNCRATE_ULTRA : 
+				AHC_SYNCRATE_FAST;
 		}
-		if (sc->device_flags[target_offset] & CFWIDEB) {
-			scsirate |= WIDEXFER;
-			spi_max_width(starget) = 1;
-		} else
-			spi_max_width(starget) = 0;
+		spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
+		if (!(flags & CFSYNCH))
+			spi_max_offset(starget) = 0;
 		spi_min_period(starget) = 
-			ahc_find_period(ahc, scsirate, AHC_SYNCRATE_DT);
+			ahc_find_period(ahc, scsirate, maxsync);
+
 		tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
 					    starget->id, &tstate);
 	}