[PATCH] sata_sil24: implement sil24_init_port()

Implement sil24_init_port which performs port initialization via
PORT_CS_INIT.  To be used later by softreset and EH.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index c535607e995a..8199527966eb 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -437,6 +437,22 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
         *tf = pp->tf;
 }
 
+static int sil24_init_port(struct ata_port *ap)
+{
+        void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
+        u32 tmp;
+
+        writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
+        ata_wait_register(port + PORT_CTRL_STAT,
+                          PORT_CS_INIT, PORT_CS_INIT, 10, 100);
+        tmp = ata_wait_register(port + PORT_CTRL_STAT,
+                                PORT_CS_RDY, 0, 10, 100);
+
+        if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY)
+                return -EIO;
+        return 0;
+}
+
 static int sil24_softreset(struct ata_port *ap, unsigned int *class)
 {
         void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;