PORT_CMD_ISSUE
PORT_CMD_ISSUE, 0x0, 1, 100))
writel(1, port_mmio + PORT_CMD_ISSUE);
tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
readl(port_mmio + PORT_CMD_ISSUE); /* flush */
qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
qc_active = readl(port_mmio + PORT_CMD_ISSUE);
writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE);