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authorEvan Wang <xswang@marvell.com>2018-04-13 07:32:30 +0300
committerTejun Heo <tj@kernel.org>2018-04-26 21:25:04 +0300
commitfa89f53bd7288d6aa7a982841119e7123faf5a53 (patch)
treeedcd32381580db6a29a58a681df8ee70dd7d8a68 /drivers/ata/ahci_qoriq.c
parentfd17ed684b6e33312cdcd9270b1fece9df266103 (diff)
downloadlinux-fa89f53bd7288d6aa7a982841119e7123faf5a53.tar.xz
libahci: Allow drivers to override stop_engine
Marvell armada37xx, armada7k and armada8k share the same AHCI sata controller IP, and currently there is an issue (Errata Ref#226)that the SATA can not be detected via SATA Port-MultiPlayer(PMP). After debugging, the reason is found that the value of Port-x FIS-based Switching Control (PxFBS@0x40) became wrong. According to design, the bits[11:8, 0] of register PxFBS are cleared when Port Command and Status (0x18) bit[0] changes its value from 1 to 0, i.e. falling edge of Port Command and Status bit[0] sends PULSE that resets PxFBS bits[11:8; 0]. So it needs save the port PxFBS register before PxCMD ST write and restore the port PxFBS register afterwards in ahci_stop_engine(). This commit allows drivers to override ahci_stop_engine behavior for use by the Marvell AHCI driver(and potentially other drivers in the future). Signed-off-by: Evan Wang <xswang@marvell.com> Cc: Ofer Heifetz <oferh@marvell.com> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci_qoriq.c')
-rw-r--r--drivers/ata/ahci_qoriq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c
index 2685f28160f7..cfdef4d44ae9 100644
--- a/drivers/ata/ahci_qoriq.c
+++ b/drivers/ata/ahci_qoriq.c
@@ -96,7 +96,7 @@ static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class,
DPRINTK("ENTER\n");
- ahci_stop_engine(ap);
+ hpriv->stop_engine(ap);
/*
* There is a errata on ls1021a Rev1.0 and Rev2.0 which is: