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[PATCH] dz: Fixes to make it work

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This a set of fixes mostly to make the driver actually work:

1. Actually select the line for setting parameters and receiver
   disable/enable.
2. Select the line for receive and transmit interrupt handling correctly.
3. Report the transmitter empty state correctly.
4. Set the I/O type of ports correctly.
5. Perform polled transmission correctly.
6. Don't fix the console line at ttyS3.
7. Magic SysRq support.
8. Various small bits here and there.

Tested with a DECstation 2100 (thanks Flo for making this possible).

[akpm@osdl.org: fix typo]
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Maciej W. Rozycki
2006-12-06 20:38:59 -08:00
committed by Linus Torvalds
parent f7dff2b126
commit 9399575dd3
3 changed files with 215 additions and 232 deletions
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32
drivers/serial/dz.h
View File

@@ -1,20 +1,22 @@
/*
* dz.h: Serial port driver for DECStations equiped
* dz.h: Serial port driver for DECstations equipped
* with the DZ chipset.
*
* Copyright (C) 1998 Olivier A. D. Lebaillif
*
* Email: olivier.lebaillif@ifrsys.com
*
* Copyright (C) 2004, 2006 Maciej W. Rozycki
*/
#ifndef DZ_SERIAL_H
#define DZ_SERIAL_H
/*
* Definitions for the Control and Status Received.
* Definitions for the Control and Status Register.
*/
#define DZ_TRDY 0x8000 /* Transmitter empty */
#define DZ_TIE 0x4000 /* Transmitter Interrupt Enable */
#define DZ_TIE 0x4000 /* Transmitter Interrupt Enbl */
#define DZ_TLINE 0x0300 /* Transmitter Line Number */
#define DZ_RDONE 0x0080 /* Receiver data ready */
#define DZ_RIE 0x0040 /* Receive Interrupt Enable */
#define DZ_MSE 0x0020 /* Master Scan Enable */
@@ -22,32 +24,44 @@
#define DZ_MAINT 0x0008 /* Loop Back Mode */
/*
* Definitions for the Received buffer.
* Definitions for the Receiver Buffer Register.
*/
#define DZ_RBUF_MASK 0x00FF /* Data Mask in the Receive Buffer */
#define DZ_LINE_MASK 0x0300 /* Line Mask in the Receive Buffer */
#define DZ_RBUF_MASK 0x00FF /* Data Mask */
#define DZ_LINE_MASK 0x0300 /* Line Mask */
#define DZ_DVAL 0x8000 /* Valid Data indicator */
#define DZ_OERR 0x4000 /* Overrun error indicator */
#define DZ_FERR 0x2000 /* Frame error indicator */
#define DZ_PERR 0x1000 /* Parity error indicator */
#define LINE(x) (x & DZ_LINE_MASK) >> 8 /* Get the line number from the input buffer */
#define UCHAR(x) (unsigned char)(x & DZ_RBUF_MASK)
#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number
from the input buffer */
#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK))
/*
* Definitions for the Transmit Register.
* Definitions for the Transmit Control Register.
*/
#define DZ_LINE_KEYBOARD 0x0001
#define DZ_LINE_MOUSE 0x0002
#define DZ_LINE_MODEM 0x0004
#define DZ_LINE_PRINTER 0x0008
#define DZ_MODEM_RTS 0x0800 /* RTS for the modem line (2) */
#define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */
#define DZ_PRINT_RTS 0x0200 /* RTS for the prntr line (3) */
#define DZ_PRINT_DTR 0x0100 /* DTR for the prntr line (3) */
#define DZ_LNENB 0x000f /* Transmitter Line Enable */
/*
* Definitions for the Modem Status Register.
*/
#define DZ_MODEM_RI 0x0800 /* RI for the modem line (2) */
#define DZ_MODEM_CD 0x0400 /* CD for the modem line (2) */
#define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */
#define DZ_MODEM_CTS 0x0100 /* CTS for the modem line (2) */
#define DZ_PRINT_RI 0x0008 /* RI for the printer line (3) */
#define DZ_PRINT_CD 0x0004 /* CD for the printer line (3) */
#define DZ_PRINT_DSR 0x0002 /* DSR for the prntr line (3) */
#define DZ_PRINT_CTS 0x0001 /* CTS for the prntr line (3) */
/*
* Definitions for the Transmit Data Register.