PERFORCE change 150916 for review

[Nathan Whitehorn]

http://perforce.freebsd.org/chv.cgi?CH=150916

Change 150916 by nwhitehorn at nwhitehorn_trantor on 2008/10/04 00:54:43

	Fix K2 SATA to actually work. Should be harmless to other Serverworks
	controllers, will ask for review.

Affected files ...

.. //depot/projects/ppc-g5/sys/dev/ata/ata-chipset.c#4 edit

Differences ...

==== //depot/projects/ppc-g5/sys/dev/ata/ata-chipset.c#4 (text+ko) ====

@@ -25,7 +25,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/sys/dev/ata/ata-chipset.c,v 1.228 2008/09/26 07:29:48 sos Exp $");
+__FBSDID("$FreeBSD: head/sys/dev/ata/ata-chipset.c 183380 2008-09-26 07:29:48Z sos $");
 
 #include "opt_ata.h"
 #include <sys/param.h>
@@ -4806,6 +4806,16 @@
 }
 
 static int
+ata_serverworks_k2status(device_t dev)
+{
+    struct ata_channel *ch = device_get_softc(dev);
+
+    ATA_IDX_INL(ch,ATA_STATUS);
+
+    return ata_pci_status(dev);
+}
+
+static int
 ata_serverworks_chipinit(device_t dev)
 {
     struct ata_pci_controller *ctlr = device_get_softc(dev);
@@ -4894,6 +4904,10 @@
     /* chip does not reliably do 64K DMA transfers */
     ch->dma.max_iosize = 126 * DEV_BSIZE;
 
+    /* For K2, we need to do a 4-byte read on the status reg */
+    if (ctlr->chip->chipid == ATA_K2)
+	ch->hw.status = ata_serverworks_k2status;
+
     return 0;
 }