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firewire: ohci: get IR bit from TSB41BA3D phy

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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>
This commit is contained in:
Stephan Gatzka 2012-09-03 21:17:50 +02:00 committed by Stefan Richter
parent badfcb2489
commit 52439d605d
1 changed files with 27 additions and 1 deletions
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28
drivers/firewire/ohci.c
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@ -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]),