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authorHans de Goede <hdegoede@redhat.com>2014-02-22 19:53:30 +0400
committerTejun Heo <tj@kernel.org>2014-02-23 00:35:41 +0400
commit039ece38da45f5e6a94be3aa7611cf3634bc2461 (patch)
treec496379b086ca1c4251b1fd914ecafb68eb22063 /drivers/ata/sata_highbank.c
parentb2a52b6a0a03000d07edb359b4059d4d871a7602 (diff)
downloadlinux-039ece38da45f5e6a94be3aa7611cf3634bc2461.tar.xz
libahci: Allow drivers to override start_engine
Allwinner A10 and A20 ARM SoCs have an AHCI sata controller which needs a special register to be poked before starting the DMA engine. This register gets reset on an ahci_stop_engine call, so there is no other place then ahci_start_engine where this poking can be done. This commit allows drivers to override ahci_start_engine behavior for use by the Allwinner AHCI driver (and potentially other drivers in the future). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/sata_highbank.c')
-rw-r--r--drivers/ata/sata_highbank.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ata/sata_highbank.c b/drivers/ata/sata_highbank.c
index 5a68b7b8f491..d4df0bf9a55a 100644
--- a/drivers/ata/sata_highbank.c
+++ b/drivers/ata/sata_highbank.c
@@ -402,6 +402,7 @@ static int ahci_highbank_hardreset(struct ata_link *link, unsigned int *class,
static const unsigned long timing[] = { 5, 100, 500};
struct ata_port *ap = link->ap;
struct ahci_port_priv *pp = ap->private_data;
+ struct ahci_host_priv *hpriv = ap->host->private_data;
u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
struct ata_taskfile tf;
bool online;
@@ -430,7 +431,7 @@ static int ahci_highbank_hardreset(struct ata_link *link, unsigned int *class,
break;
} while (!online && retry--);
- ahci_start_engine(ap);
+ hpriv->start_engine(ap);
if (online)
*class = ahci_dev_classify(ap);