firewire: ohci: get IR bit from TSB41BA3D phy

In case of a self constructed selfID packet this patch correctly
determines the information if the TSB41BA3D phy initiated a bus reset.

Signed-off-by: Stephan Gatzka <[e-mail]>
Signed-off-by: Stefan Richter <[e-mail]>

drivers/firewire/ohci.c

···
 	return i;
 }
 
+static int initiated_reset(struct fw_ohci *ohci)
+{
+	int reg;
+	int ret = 0;
+
+	mutex_lock(&ohci->phy_reg_mutex);
+	reg = write_phy_reg(ohci, 7, 0xe0); /* Select page 7 */
+	if (reg >= 0) {
+		reg = read_phy_reg(ohci, 8);
+		reg |= 0x40;
+		reg = write_phy_reg(ohci, 8, reg); /* set PMODE bit */
+		if (reg >= 0) {
+			reg = read_phy_reg(ohci, 12); /* read register 12 */
+			if (reg >= 0) {
+				if ((reg & 0x08) == 0x08) {
+					/* bit 3 indicates "initiated reset" */
+					ret = 0x2;
+				}
+			}
+		}
+	}
+	mutex_unlock(&ohci->phy_reg_mutex);
+	return ret;
+}
+
 /*
  * TI TSB82AA2B and TSB12LV26 do not receive the selfID of a locally
  * attached TSB41BA3D phy; see http://www.ti.com/litv/pdf/sllz059.
  * Construct the selfID from phy register contents.
- * FIXME:  How to determine the selfID.i flag?
  */
 static int find_and_insert_self_id(struct fw_ohci *ohci, int self_id_count)
 {
···
 			return status;
 		self_id |= ((status & 0x3) << (6 - (i * 2)));
 	}
+
+	self_id |= initiated_reset(ohci);
 
 	pos = get_self_id_pos(ohci, self_id, self_id_count);
 	if (pos >= 0) {