diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ahci.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index 7b0640bc007..4e96ec5f2ff 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -134,6 +134,7 @@ enum { PORT_IRQ_D2H_REG_FIS, /* PORT_CMD bits */ + PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */ PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */ PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */ PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */ @@ -441,7 +442,7 @@ static void ahci_phy_reset(struct ata_port *ap) void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; struct ata_taskfile tf; struct ata_device *dev = &ap->device[0]; - u32 tmp; + u32 new_tmp, tmp; __sata_phy_reset(ap); @@ -455,8 +456,21 @@ static void ahci_phy_reset(struct ata_port *ap) tf.nsect = (tmp) & 0xff; dev->class = ata_dev_classify(&tf); - if (!ata_dev_present(dev)) + if (!ata_dev_present(dev)) { ata_port_disable(ap); + return; + } + + /* Make sure port's ATAPI bit is set appropriately */ + new_tmp = tmp = readl(port_mmio + PORT_CMD); + if (dev->class == ATA_DEV_ATAPI) + new_tmp |= PORT_CMD_ATAPI; + else + new_tmp &= ~PORT_CMD_ATAPI; + if (new_tmp != tmp) { + writel(new_tmp, port_mmio + PORT_CMD); + readl(port_mmio + PORT_CMD); /* flush */ + } } static u8 ahci_check_status(struct ata_port *ap) |