atp870u: Add remaining 870 support to is885()

Add remaining 870 support to is885():
 - different synw, no synuw
 - synu[4] = 0x0c
 - atp_writeb_io(dev, c, 0x04, 0x00); instead of
   atp_writeb_io(dev, c, 0x14, 0x00); (isn't that a bug?)
 - atp_writeb_io(dev, c, 0x14, 0xff); instead of
   atp_writeb_io(dev, c, 0x14, 0x06);
 - different mbuf[3] and mbuf[4] checks
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/atp870u.c

@@ -2262,6 +2262,7 @@ static void is885(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigne
 	static unsigned char synn[6] = { 0x80, 1, 3, 1, 0x19, 0x0e };
 	unsigned char synu[6] = { 0x80, 1, 3, 1, 0x0a, 0x0e };
 	static unsigned char synw[6] = { 0x80, 1, 3, 1, 0x19, 0x0e };
+	static unsigned char synw_870[6] = { 0x80, 1, 3, 1, 0x0c, 0x07 };
 	unsigned char synuw[6] = { 0x80, 1, 3, 1, 0x0a, 0x0e };
 	static unsigned char wide[6] = { 0x80, 1, 2, 3, 1, 0 };
 	static unsigned char u3[9] = { 0x80, 1, 6, 4, 0x09, 00, 0x0e, 0x01, 0x02 };
@@ -2311,7 +2312,10 @@ static void is885(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigne
 		dev->active_id[c] |= m;
 
 		atp_writeb_io(dev, c, 0x10, 0x30);
+		if (dev->dev_id == ATP885_DEVID || dev->dev_id == ATP880_DEVID1 || dev->dev_id == ATP880_DEVID2)
 			atp_writeb_io(dev, c, 0x14, 0x00);
+		else /* result of is870() merge - is this a bug? */
+			atp_writeb_io(dev, c, 0x04, 0x00);
 
 phase_cmd:
 		atp_writeb_io(dev, c, 0x18, 0x08);
@@ -2657,7 +2661,7 @@ static void is885(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigne
 		}
 		continue;
 set_sync:
-		if (dev->sp[c][i] == 0x02) {
+		if ((dev->dev_id != ATP885_DEVID && dev->dev_id != ATP880_DEVID1 && dev->dev_id != ATP880_DEVID2) || (dev->sp[c][i] == 0x02)) {
 			synu[4] = 0x0c;
 			synuw[4] = 0x0c;
 		} else {
@@ -2701,11 +2705,14 @@ static void is885(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigne
 		while ((atp_readb_io(dev, c, 0x1f) & 0x80) == 0) {
 			if ((atp_readb_io(dev, c, 0x1f) & 0x01) != 0) {
 				if ((m & dev->wide_id[c]) != 0) {
+					if (dev->dev_id == ATP885_DEVID || dev->dev_id == ATP880_DEVID1 || dev->dev_id == ATP880_DEVID2) {
 						if ((m & dev->ultra_map[c]) != 0) {
 							atp_writeb_io(dev, c, 0x19, synuw[j++]);
 						} else {
 							atp_writeb_io(dev, c, 0x19, synw[j++]);
 						}
+					} else
+						atp_writeb_io(dev, c, 0x19, synw_870[j++]);
 				} else {
 					if ((m & dev->ultra_map[c]) != 0) {
 						atp_writeb_io(dev, c, 0x19, synu[j++]);
@@ -2753,7 +2760,10 @@ static void is885(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigne
 		}
 		continue;
 phase_ins:
+		if (dev->dev_id == ATP885_DEVID || dev->dev_id == ATP880_DEVID1 || dev->dev_id == ATP880_DEVID2)
 			atp_writeb_io(dev, c, 0x14, 0x06);
+		else
+			atp_writeb_io(dev, c, 0x14, 0xff);
 		atp_writeb_io(dev, c, 0x18, 0x20);
 		k = 0;
 phase_ins1:
@@ -2808,10 +2818,17 @@ static void is885(struct atp_unit *dev, unsigned char c, bool wide_chip, unsigne
 		if (mbuf[3] > 0x64) {
 			continue;
 		}
+		if (dev->dev_id == ATP885_DEVID || dev->dev_id == ATP880_DEVID1 || dev->dev_id == ATP880_DEVID2) {
 			if (mbuf[4] > 0x0e) {
 				mbuf[4] = 0x0e;
 			}
+		} else {
+			if (mbuf[4] > 0x0c) {
+				mbuf[4] = 0x0c;
+			}
+		}
 		dev->id[c][i].devsp = mbuf[4];
+		if (dev->dev_id == ATP885_DEVID || dev->dev_id == ATP880_DEVID1 || dev->dev_id == ATP880_DEVID2)
 			if (mbuf[3] < 0x0c) {
 				j = 0xb0;
 				goto set_syn_ok;