Disk drive comprising code segments for interfacing with a component such as a read channel
View Patent ↗A disk drive is disclosed comprising a disk, a head actuated over the disk, and a read channel for processing a read signal generated by the head. The disk drive further comprises a plurality of code segments including a read channel interface procedure having an input parameter comprising a pointer to a data structure. The data structure comprises a command ID identifying one of a plurality of routines, input data for use by the routine identified by the command ID, a pointer to a data structure for use by the routine identified by the command ID, and output data returned by the routine identified by the command ID.
1. A disk drive comprising:
a disk;
a head actuated over the disk;
a vendor specific read channel for processing a read signal generated by the head; and
a plurality of code segments comprising a generic read channel interface procedure call for interfacing with the vendor specific read channel, the generic read channel interface procedure call having an input parameter comprising a pointer to a data structure, the data structure comprising:
a command ID identifying one of a plurality of routines;
input data for use by the routine identified by the command ID;
a pointer to a data structure for use by the routine identified by the command ID; and
output data returned by the routine identified by the command ID.
2. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for setting an operating mode of the read channel.
3. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for initializing the read channel.
4. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for selecting a read bias for the head.
5. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for reading repeatable runout (RRO) data from the disk.
6. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for writing repeatable runout (RRO) data to the disk.
7. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for returning a vendor ID of the read channel.
8. The disk drive as recited in claim 1 , wherein the command ID identifies a routine for returning a variable gain amplifier (VGA) setting for the head.
9. The disk drive as recited in claim 1 , further comprising a vendor specific preamp for amplifying the read signal, wherein the code segments further comprise a generic set power mode procedure call for setting a power mode of the vendor specific preamp, wherein the generic set power mode procedure call includes an input constant selected from a mode group comprising:
0x00—corresponding to a sleep mode; and
0x01—corresponding to a normal mode.
10. A disk drive comprising:
a disk;
a head actuated over the disk;
a vendor specific preamp for amplifying a read signal generated by the head to generate an amplified read signal; and
a plurality of code segments comprising a generic set power mode procedure call for setting a power mode of the vendor specific preamp, wherein the generic set power mode procedure call includes an input constant selected from a mode group comprising:
0x00—corresponding to a sleep mode; and
0x01—corresponding to a normal mode.
11. A method of operating a disk drive, the disk drive comprising a disk, a head actuated over the disk, and a vendor specific read channel for processing a read signal generated by the head, the method comprising:
executing a generic read channel interface procedure call for interfacing with the vendor specific read channel, the generic read channel interface procedure call having an input parameter comprising a pointer to a data structure, the data structure comprising:
a command ID identifying one of a plurality of routines;
input data for use by the routine identified by the command ID;
a pointer to a data structure for use by the routine identified by the command ID; and
output data returned by the routine identified by the command ID.
12. The method as recited in claim 11 , wherein the command ID identifies a routine for setting an operating mode of the read channel.
13. The method as recited in claim 11 , wherein the command ID identifies a routine for initializing the read channel.
14. The method as recited in claim 11 , wherein the command ID identifies a routine for selecting a read bias for the head.
15. The method as recited in claim 11 , wherein the command ID identifies a routine for reading repeatable runout (RRO) data from the disk.
16. The method as recited in claim 11 , wherein the command ID identifies a routine for writing repeatable runout (RRO) data to the disk.
17. The method as recited in claim 11 , wherein the command ID identifies a routine for returning a vendor ID of the read channel.
18. The method as recited in claim 11 , wherein the command ID identifies a routine for returning a variable gain amplifier (VGA) setting for the head.
19. The method as recited in claim 11 , wherein the disk drive further comprises a vendor specific preamp for amplifying the read signal, the method further comprising executing a generic set power mode procedure call for setting a power mode of the vendor specific preamp, wherein the generic set power mode procedure call includes an input constant selected from a mode group comprising:
0x00—corresponding to a sleep mode; and
0x01—corresponding to a normal mode.
20. A method of operating a disk drive, the disk drive comprising a disk, a head actuated over the disk, and a vendor specific preamp for amplifying a read signal generated by the head to generate an amplified read signal, the method comprising executing a generic set power mode procedure call for setting a power mode of the vendor specific preamp, wherein the generic set power mode procedure call includes an input constant selected from a mode group comprising:
0x00—corresponding to a sleep mode; and
0x01—corresponding to a normal mode.