diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2014-02-22 16:53:30 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-02-22 21:35:41 +0100 |
| commit | 039ece38da45f5e6a94be3aa7611cf3634bc2461 (patch) | |
| tree | c496379b086ca1c4251b1fd914ecafb68eb22063 /drivers/ata/ahci.c | |
| parent | ata: libahci: replace obsolete simple_strtoul() with kstrtouint() (diff) | |
| download | linux-039ece38da45f5e6a94be3aa7611cf3634bc2461.tar.xz linux-039ece38da45f5e6a94be3aa7611cf3634bc2461.zip | |
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/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index b6a49ce71f6e..1d4efe540604 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -563,6 +563,7 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { struct ata_port *ap = link->ap; + struct ahci_host_priv *hpriv = ap->host->private_data; bool online; int rc; @@ -573,7 +574,7 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context), deadline, &online, NULL); - ahci_start_engine(ap); + hpriv->start_engine(ap); DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); @@ -588,6 +589,7 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class, { 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; @@ -603,7 +605,7 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class, rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context), deadline, &online, NULL); - ahci_start_engine(ap); + hpriv->start_engine(ap); /* The pseudo configuration device on SIMG4726 attached to * ASUS P5W-DH Deluxe doesn't send signature FIS after |