[IA64] Altix patch for fpga reset

1) workaround a h/w reset issue
2) to improve the determination of FPGA-based h/w in
   the arch/ia64/sn/kernel/tiocx code.

Signed-off-by: Bruce Losure <blosure@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 33 insertions, 29 deletions

diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index 254fe15c064..d8664715764 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -183,11 +183,12 @@ int cx_driver_unregister(struct cx_drv *cx_driver)
  * @part_num: device's part number
  * @mfg_num: device's manufacturer number
  * @hubdev: hub info associated with this device
+ * @bt: board type of the device
  *
  */
 int
 cx_device_register(nasid_t nasid, int part_num, int mfg_num,
-		   struct hubdev_info *hubdev)
+		   struct hubdev_info *hubdev, int bt)
 {
 	struct cx_dev *cx_dev;
 
@@ -200,6 +201,7 @@ cx_device_register(nasid_t nasid, int part_num, int mfg_num,
 	cx_dev->cx_id.mfg_num = mfg_num;
 	cx_dev->cx_id.nasid = nasid;
 	cx_dev->hubdev = hubdev;
+	cx_dev->bt = bt;
 
 	cx_dev->dev.parent = NULL;
 	cx_dev->dev.bus = &tiocx_bus_type;
@@ -238,7 +240,8 @@ static int cx_device_reload(struct cx_dev *cx_dev)
 {
 	cx_device_unregister(cx_dev);
 	return cx_device_register(cx_dev->cx_id.nasid, cx_dev->cx_id.part_num,
-				  cx_dev->cx_id.mfg_num, cx_dev->hubdev);
+				  cx_dev->cx_id.mfg_num, cx_dev->hubdev,
+				  cx_dev->bt);
 }
 
 static inline uint64_t tiocx_intr_alloc(nasid_t nasid, int widget,
@@ -365,26 +368,20 @@ static void tio_corelet_reset(nasid_t nasid, int corelet)
 	udelay(2000);
 }
 
-static int tiocx_btchar_get(int nasid)
+static int is_fpga_tio(int nasid, int *bt)
 {
-	moduleid_t module_id;
-	geoid_t geoid;
-	int cnodeid;
-
-	cnodeid = nasid_to_cnodeid(nasid);
-	geoid = cnodeid_get_geoid(cnodeid);
-	module_id = geo_module(geoid);
-	return MODULE_GET_BTCHAR(module_id);
-}
+	int ioboard_type;
 
-static int is_fpga_brick(int nasid)
-{
-	switch (tiocx_btchar_get(nasid)) {
+	ioboard_type = ia64_sn_sysctl_ioboard_get(nasid);
+
+	switch (ioboard_type) {
 	case L1_BRICKTYPE_SA:
 	case L1_BRICKTYPE_ATHENA:
-	case L1_BRICKTYPE_DAYTONA:
+	case L1_BOARDTYPE_DAYTONA:
+		*bt = ioboard_type;
 		return 1;
 	}
+
 	return 0;
 }
 
@@ -407,16 +404,22 @@ static int tiocx_reload(struct cx_dev *cx_dev)
 
 	if (bitstream_loaded(nasid)) {
 		uint64_t cx_id;
-
-		cx_id =
-		    *(volatile uint64_t *)(TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
+		int rv;
+
+		rv = ia64_sn_sysctl_tio_clock_reset(nasid);
+		if (rv) {
+			printk(KERN_ALERT "CX port JTAG reset failed.\n");
+		} else {
+			cx_id = *(volatile uint64_t *)
+				(TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
 					  WIDGET_ID);
-		part_num = XWIDGET_PART_NUM(cx_id);
-		mfg_num = XWIDGET_MFG_NUM(cx_id);
-		DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
-		/* just ignore it if it's a CE */
-		if (part_num == TIO_CE_ASIC_PARTNUM)
-			return 0;
+			part_num = XWIDGET_PART_NUM(cx_id);
+			mfg_num = XWIDGET_MFG_NUM(cx_id);
+			DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
+			/* just ignore it if it's a CE */
+			if (part_num == TIO_CE_ASIC_PARTNUM)
+				return 0;
+		}
 	}
 
 	cx_dev->cx_id.part_num = part_num;
@@ -436,10 +439,10 @@ static ssize_t show_cxdev_control(struct device *dev, struct device_attribute *a
 {
 	struct cx_dev *cx_dev = to_cx_dev(dev);
 
-	return sprintf(buf, "0x%x 0x%x 0x%x %d\n",
+	return sprintf(buf, "0x%x 0x%x 0x%x 0x%x\n",
 		       cx_dev->cx_id.nasid,
 		       cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num,
-		       tiocx_btchar_get(cx_dev->cx_id.nasid));
+		       cx_dev->bt);
 }
 
 static ssize_t store_cxdev_control(struct device *dev, struct device_attribute *attr, const char *buf,
@@ -488,11 +491,12 @@ static int __init tiocx_init(void)
 
 	for (cnodeid = 0; cnodeid < MAX_COMPACT_NODES; cnodeid++) {
 		nasid_t nasid;
+		int bt;
 
 		if ((nasid = cnodeid_to_nasid(cnodeid)) < 0)
 			break;	/* No more nasids .. bail out of loop */
 
-		if ((nasid & 0x1) && is_fpga_brick(nasid)) {
+		if ((nasid & 0x1) && is_fpga_tio(nasid, &bt)) {
 			struct hubdev_info *hubdev;
 			struct xwidget_info *widgetp;
 
@@ -512,7 +516,7 @@ static int __init tiocx_init(void)
 
 			if (cx_device_register
 			    (nasid, widgetp->xwi_hwid.part_num,
-			     widgetp->xwi_hwid.mfg_num, hubdev) < 0)
+			     widgetp->xwi_hwid.mfg_num, hubdev, bt) < 0)
 				return -ENXIO;
 			else
 				found_tiocx_device++;