Commit b6e7b447 authored May 12, 2008 by Sonic Zhang Committed by Jeff Garzik May 19, 2008

pata-bf54x: Set ATAPI HSM to control IDE device terminate sequence.



Set ATAPI host state machine to control IDE device terminate sequence.
Some IDE harddisk may assert terminate sequence in the middle of a
formal DMA transaction and resume later. Bit DETECT_TERM in ATAPI_CTRL
register determines whether the ATAPI host state machine or the kernel
driver should take care of this case.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

parent 860da5e5

drivers/ata/pata_bf54x.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -911,6 +911,9 @@ static void bfin_bmdma_start(struct ata_queued_cmd *qc)
		/* Reset all transfer count */
		ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) \| TFRCNT_RST);

		/* Set ATAPI state machine contorl in terminate sequence */
		ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) \| END_ON_TERM);

		/* Set transfer length to buffer len */
		for_each_sg(qc->sg, sg, qc->n_elem, si) {
		ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));