+static inline int ata_check_ready(u8 status)
+{
+ /* Some controllers report 0x77 or 0x7f during intermediate
+ * not-ready stages.
+ */
+ if (status == 0x77 || status == 0x7f)
+ return 0;
+
+ /* 0xff indicates either no device or device not ready */
+ if (status == 0xff)
+ return -ENODEV;
+
+ return !(status & ATA_BUSY);
+}
+
+
+/**************************************************************************
+ * PMP - drivers/ata/libata-pmp.c
+ */
+#ifdef CONFIG_SATA_PMP
+
+extern const struct ata_port_operations sata_pmp_port_ops;
+
+extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
+extern void sata_pmp_error_handler(struct ata_port *ap);
+
+#else /* CONFIG_SATA_PMP */
+
+#define sata_pmp_port_ops sata_port_ops
+#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
+#define sata_pmp_error_handler ata_std_error_handler
+
+#endif /* CONFIG_SATA_PMP */
+
+
+/**************************************************************************
+ * SFF - drivers/ata/libata-sff.c
+ */
+#ifdef CONFIG_ATA_SFF
+
+extern const struct ata_port_operations ata_sff_port_ops;
+extern const struct ata_port_operations ata_bmdma_port_ops;
+
+/* PIO only, sg_tablesize and dma_boundary limits can be removed */
+#define ATA_PIO_SHT(drv_name) \
+ ATA_BASE_SHT(drv_name), \
+ .sg_tablesize = LIBATA_MAX_PRD, \
+ .dma_boundary = ATA_DMA_BOUNDARY
+
+#define ATA_BMDMA_SHT(drv_name) \
+ ATA_BASE_SHT(drv_name), \
+ .sg_tablesize = LIBATA_MAX_PRD, \
+ .dma_boundary = ATA_DMA_BOUNDARY
+
+extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
+extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
+extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
+extern u8 ata_sff_check_status(struct ata_port *ap);
+extern u8 ata_sff_altstatus(struct ata_port *ap);
+extern int ata_sff_busy_sleep(struct ata_port *ap,
+ unsigned long timeout_pat, unsigned long timeout);
+extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
+extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
+extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
+extern void ata_sff_exec_command(struct ata_port *ap,
+ const struct ata_taskfile *tf);
+extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
+ unsigned char *buf, unsigned int buflen, int rw);
+extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
+ unsigned char *buf, unsigned int buflen, int rw);
+extern u8 ata_sff_irq_on(struct ata_port *ap);
+extern void ata_sff_irq_clear(struct ata_port *ap);
+extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
+ u8 status, int in_wq);
+extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
+extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
+extern unsigned int ata_sff_host_intr(struct ata_port *ap,
+ struct ata_queued_cmd *qc);
+extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
+extern void ata_sff_freeze(struct ata_port *ap);
+extern void ata_sff_thaw(struct ata_port *ap);
+extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
+extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
+ u8 *r_err);
+extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
+ unsigned long deadline);
+extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
+ unsigned long deadline);
+extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
+extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
+extern void ata_sff_error_handler(struct ata_port *ap);
+extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
+extern int ata_sff_port_start(struct ata_port *ap);
+extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
+extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
+ unsigned long xfer_mask);
+extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
+extern void ata_bmdma_start(struct ata_queued_cmd *qc);
+extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
+extern u8 ata_bmdma_status(struct ata_port *ap);
+extern void ata_bus_reset(struct ata_port *ap);
+
+#ifdef CONFIG_PCI
+extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
+extern int ata_pci_bmdma_init(struct ata_host *host);
+extern int ata_pci_sff_init_host(struct ata_host *host);
+extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
+ const struct ata_port_info * const * ppi,
+ struct ata_host **r_host);
+extern int ata_pci_sff_activate_host(struct ata_host *host,
+ irq_handler_t irq_handler,
+ struct scsi_host_template *sht);
+extern int ata_pci_sff_init_one(struct pci_dev *pdev,
+ const struct ata_port_info * const * ppi,
+ struct scsi_host_template *sht, void *host_priv);
+#endif /* CONFIG_PCI */
+
+/**
+ * ata_sff_pause - Flush writes and pause 400 nanoseconds.
+ * @ap: Port to wait for.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+static inline void ata_sff_pause(struct ata_port *ap)
+{
+ ata_sff_altstatus(ap);
+ ndelay(400);
+}
+
+/**
+ * ata_sff_busy_wait - Wait for a port status register
+ * @ap: Port to wait for.
+ * @bits: bits that must be clear
+ * @max: number of 10uS waits to perform
+ *
+ * Waits up to max*10 microseconds for the selected bits in the port's
+ * status register to be cleared.
+ * Returns final value of status register.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
+ unsigned int max)
+{
+ u8 status;
+
+ do {
+ udelay(10);
+ status = ap->ops->sff_check_status(ap);
+ max--;
+ } while (status != 0xff && (status & bits) && (max > 0));
+
+ return status;
+}
+
+/**
+ * ata_wait_idle - Wait for a port to be idle.
+ * @ap: Port to wait for.
+ *
+ * Waits up to 10ms for port's BUSY and DRQ signals to clear.
+ * Returns final value of status register.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+static inline u8 ata_wait_idle(struct ata_port *ap)
+{
+ u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
+
+#ifdef ATA_DEBUG
+ if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
+ ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
+ status);
+#endif
+
+ return status;
+}
+#endif /* CONFIG_ATA_SFF */
+