diff options
| -rw-r--r-- | drivers/block/ahci.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c index 37d2d2a..c908fab 100644 --- a/drivers/block/ahci.c +++ b/drivers/block/ahci.c @@ -513,6 +513,20 @@ static void ahci_set_feature(u8 port) } #endif +static int wait_spinup(volatile u8 *port_mmio) +{ + ulong start; + u32 tf_data; + + start = get_timer(0); + do { + tf_data = readl(port_mmio + PORT_TFDATA); + if (!(tf_data & ATA_BUSY)) + return 0; + } while (get_timer(start) < WAIT_MS_SPINUP); + + return -ETIMEDOUT; +} static int ahci_port_start(u8 port) { @@ -579,7 +593,11 @@ static int ahci_port_start(u8 port) debug("Exit start port %d\n", port); - return 0; + /* + * Make sure interface is not busy based on error and status + * information from task file data register before proceeding + */ + return wait_spinup(port_mmio); } |