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 <stephan.gatzka@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index c788dbdaf3bc..834e71d2324d 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1777,11 +1777,35 @@ static int get_self_id_pos(struct fw_ohci *ohci, u32 self_id,
         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)
 {
@@ -1814,6 +1838,8 @@ static int find_and_insert_self_id(struct fw_ohci *ohci, int self_id_count)
                 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) {
                 memmove(&(ohci->self_id_buffer[pos+1]),