pata-bf54x: Set ATAPI HSM to control IDE device terminate sequence.
authorSonic Zhang <sonic.zhang@analog.com>
Mon, 12 May 2008 04:12:16 +0000 (12:12 +0800)
committerJeff Garzik <jgarzik@redhat.com>
Mon, 19 May 2008 21:27:29 +0000 (17:27 -0400)
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>
drivers/ata/pata_bf54x.c

index 9ab89732cf9474f1fa34458717bb9bd7da755d88..55516103626a7e7616c545ed64b3a0b54a750b1c 100644 (file)
@@ -911,7 +911,10 @@ 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 transfer length to buffer len */
+       /* 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));
        }