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Commit 52439d60 authored by Stephan Gatzka's avatar Stephan Gatzka Committed by Stefan Richter
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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: default avatarStephan Gatzka <stephan.gatzka@gmail.com>
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent badfcb24

drivers/firewire/ohci.c

+27 −1
Original line number Diff line number Diff line
@@ -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]),