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floppy: add references to 82077's extra registers 

This controller provides extra status registers SRA and SRB as well
as a tape drive register (TDR) and a data rate select register (DSR),
which are referenced in the sparc port, so let's have their symbolic
definitions centralized.

Link: https://lore.kernel.org/r/20200331094054.24441-3-w@1wt.eu
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Denis Efremov <efremov@linux.com>
This commit is contained in:
Willy Tarreau 2020-03-31 11:40:33 +02:00 committed by Denis Efremov
parent e72e8bf1c9
commit 7d33850abd
1 changed files with 13 additions and 3 deletions
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16
include/uapi/linux/fdreg.h
View File

@ -7,13 +7,23 @@
* Handbook", Sanches and Canton.
*/
/* Fd controller regs. S&C, about page 340 */
#define FD_STATUS 4
#define FD_DATA 5
/* 82077's auxiliary status registers A & B (R) */
#define FD_SRA 0
#define FD_SRB 1
/* Digital Output Register */
#define FD_DOR 2
/* 82077's tape drive register (R/W) */
#define FD_TDR 3
/* 82077's data rate select register (W) */
#define FD_DSR 4
/* Fd controller regs. S&C, about page 340 */
#define FD_STATUS 4
#define FD_DATA 5
/* Digital Input Register (read) */
#define FD_DIR 7