xref: /openbmc/linux/drivers/tty/serial/dz.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * dz.h: Serial port driver for DECstations equipped
4  *       with the DZ chipset.
5  *
6  * Copyright (C) 1998 Olivier A. D. Lebaillif
7  *
8  * Email: olivier.lebaillif@ifrsys.com
9  *
10  * Copyright (C) 2004, 2006  Maciej W. Rozycki
11  */
12 #ifndef DZ_SERIAL_H
13 #define DZ_SERIAL_H
14 
15 /*
16  * Definitions for the Control and Status Register.
17  */
18 #define DZ_TRDY        0x8000                 /* Transmitter empty */
19 #define DZ_TIE         0x4000                 /* Transmitter Interrupt Enbl */
20 #define DZ_TLINE       0x0300                 /* Transmitter Line Number */
21 #define DZ_RDONE       0x0080                 /* Receiver data ready */
22 #define DZ_RIE         0x0040                 /* Receive Interrupt Enable */
23 #define DZ_MSE         0x0020                 /* Master Scan Enable */
24 #define DZ_CLR         0x0010                 /* Master reset */
25 #define DZ_MAINT       0x0008                 /* Loop Back Mode */
26 
27 /*
28  * Definitions for the Receiver Buffer Register.
29  */
30 #define DZ_RBUF_MASK   0x00FF                 /* Data Mask */
31 #define DZ_LINE_MASK   0x0300                 /* Line Mask */
32 #define DZ_DVAL        0x8000                 /* Valid Data indicator */
33 #define DZ_OERR        0x4000                 /* Overrun error indicator */
34 #define DZ_FERR        0x2000                 /* Frame error indicator */
35 #define DZ_PERR        0x1000                 /* Parity error indicator */
36 
37 #define DZ_BREAK       0x0800                 /* BREAK event software flag */
38 
39 #define LINE(x) ((x & DZ_LINE_MASK) >> 8)     /* Get the line number
40                                                  from the input buffer */
41 #define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK))
42 
43 /*
44  * Definitions for the Transmit Control Register.
45  */
46 #define DZ_LINE_KEYBOARD 0x0001
47 #define DZ_LINE_MOUSE    0x0002
48 #define DZ_LINE_MODEM    0x0004
49 #define DZ_LINE_PRINTER  0x0008
50 
51 #define DZ_MODEM_RTS     0x0800               /* RTS for the modem line (2) */
52 #define DZ_MODEM_DTR     0x0400               /* DTR for the modem line (2) */
53 #define DZ_PRINT_RTS     0x0200               /* RTS for the prntr line (3) */
54 #define DZ_PRINT_DTR     0x0100               /* DTR for the prntr line (3) */
55 #define DZ_LNENB         0x000f               /* Transmitter Line Enable */
56 
57 /*
58  * Definitions for the Modem Status Register.
59  */
60 #define DZ_MODEM_RI      0x0800               /* RI for the modem line (2) */
61 #define DZ_MODEM_CD      0x0400               /* CD for the modem line (2) */
62 #define DZ_MODEM_DSR     0x0200               /* DSR for the modem line (2) */
63 #define DZ_MODEM_CTS     0x0100               /* CTS for the modem line (2) */
64 #define DZ_PRINT_RI      0x0008               /* RI for the printer line (3) */
65 #define DZ_PRINT_CD      0x0004               /* CD for the printer line (3) */
66 #define DZ_PRINT_DSR     0x0002               /* DSR for the prntr line (3) */
67 #define DZ_PRINT_CTS     0x0001               /* CTS for the prntr line (3) */
68 
69 /*
70  * Definitions for the Transmit Data Register.
71  */
72 #define DZ_BRK0          0x0100               /* Break assertion for line 0 */
73 #define DZ_BRK1          0x0200               /* Break assertion for line 1 */
74 #define DZ_BRK2          0x0400               /* Break assertion for line 2 */
75 #define DZ_BRK3          0x0800               /* Break assertion for line 3 */
76 
77 /*
78  * Definitions for the Line Parameter Register.
79  */
80 #define DZ_KEYBOARD      0x0000               /* line 0 = keyboard */
81 #define DZ_MOUSE         0x0001               /* line 1 = mouse */
82 #define DZ_MODEM         0x0002               /* line 2 = modem */
83 #define DZ_PRINTER       0x0003               /* line 3 = printer */
84 
85 #define DZ_CSIZE         0x0018               /* Number of bits per byte (mask) */
86 #define DZ_CS5           0x0000               /* 5 bits per byte */
87 #define DZ_CS6           0x0008               /* 6 bits per byte */
88 #define DZ_CS7           0x0010               /* 7 bits per byte */
89 #define DZ_CS8           0x0018               /* 8 bits per byte */
90 
91 #define DZ_CSTOPB        0x0020               /* 2 stop bits instead of one */
92 
93 #define DZ_PARENB        0x0040               /* Parity enable */
94 #define DZ_PARODD        0x0080               /* Odd parity instead of even */
95 
96 #define DZ_CBAUD         0x0E00               /* Baud Rate (mask) */
97 #define DZ_B50           0x0000
98 #define DZ_B75           0x0100
99 #define DZ_B110          0x0200
100 #define DZ_B134          0x0300
101 #define DZ_B150          0x0400
102 #define DZ_B300          0x0500
103 #define DZ_B600          0x0600
104 #define DZ_B1200         0x0700
105 #define DZ_B1800         0x0800
106 #define DZ_B2000         0x0900
107 #define DZ_B2400         0x0A00
108 #define DZ_B3600         0x0B00
109 #define DZ_B4800         0x0C00
110 #define DZ_B7200         0x0D00
111 #define DZ_B9600         0x0E00
112 
113 #define DZ_RXENAB        0x1000               /* Receiver Enable */
114 
115 /*
116  * Addresses for the DZ registers
117  */
118 #define DZ_CSR       0x00            /* Control and Status Register */
119 #define DZ_RBUF      0x08            /* Receive Buffer */
120 #define DZ_LPR       0x08            /* Line Parameters Register */
121 #define DZ_TCR       0x10            /* Transmitter Control Register */
122 #define DZ_MSR       0x18            /* Modem Status Register */
123 #define DZ_TDR       0x18            /* Transmit Data Register */
124 
125 #define DZ_NB_PORT 4
126 
127 #define DZ_XMIT_SIZE   4096                 /* buffer size */
128 #define DZ_WAKEUP_CHARS   DZ_XMIT_SIZE/4
129 
130 #endif /* DZ_SERIAL_H */
131