Add ide-timing functionality to libata.

[firefly-linux-kernel-4.4.55.git] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 0261c55f34837a4049e9651770cbabb7304efa9b..0e214f8c8f9f6f6f85387e79de788725551aa0ef 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -388,6 +388,19 @@ struct ata_port_info {
        struct ata_port_operations      *port_ops;
 };
 
+struct ata_timing {
+       unsigned short mode;            /* ATA mode */
+       unsigned short setup;           /* t1 */
+       unsigned short act8b;           /* t2 for 8-bit I/O */
+       unsigned short rec8b;           /* t2i for 8-bit I/O */
+       unsigned short cyc8b;           /* t0 for 8-bit I/O */
+       unsigned short active;          /* t2 or tD */
+       unsigned short recover;         /* t2i or tK */
+       unsigned short cycle;           /* t0 */
+       unsigned short udma;            /* t2CYCTYP/2 */
+};
+
+#define FIT(v,vmin,vmax)       max_t(short,min_t(short,v,vmax),vmin)
 
 extern void ata_port_probe(struct ata_port *);
 extern void __sata_phy_reset(struct ata_port *ap);
@@ -451,6 +464,32 @@ extern int ata_std_bios_param(struct scsi_device *sdev,
                              sector_t capacity, int geom[]);
 extern int ata_scsi_slave_config(struct scsi_device *sdev);
 
+/*
+ * Timing helpers
+ */
+extern int ata_timing_compute(struct ata_device *, unsigned short,
+                             struct ata_timing *, int, int);
+extern void ata_timing_merge(const struct ata_timing *,
+                            const struct ata_timing *, struct ata_timing *,
+                            unsigned int);
+
+enum {
+       ATA_TIMING_SETUP        = (1 << 0),
+       ATA_TIMING_ACT8B        = (1 << 1),
+       ATA_TIMING_REC8B        = (1 << 2),
+       ATA_TIMING_CYC8B        = (1 << 3),
+       ATA_TIMING_8BIT         = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
+                                 ATA_TIMING_CYC8B,
+       ATA_TIMING_ACTIVE       = (1 << 4),
+       ATA_TIMING_RECOVER      = (1 << 5),
+       ATA_TIMING_CYCLE        = (1 << 6),
+       ATA_TIMING_UDMA         = (1 << 7),
+       ATA_TIMING_ALL          = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
+                                 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
+                                 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
+                                 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
+};
+
 
 #ifdef CONFIG_PCI
 struct pci_bits {