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authorStephan Gatzka <stephan.gatzka@gmail.com>2012-09-03 21:17:50 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2012-09-25 16:18:17 +0200
commit52439d605d6604c15954281a1d2831471dbd024c (patch)
tree9cf60b1b7d61a329ae977776f19efdc49526d158 /drivers/firewire
parentbadfcb24891ccd6d37750864b97586af8ab052c3 (diff)
downloadlinux-52439d605d6604c15954281a1d2831471dbd024c.tar.bz2
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>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/ohci.c28
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]),