2 * (C) Copyright 2006, Imagos S.a.s <www.imagos.it>
3 * Renato Andreola <renato.andreola@imagos.it>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 /*************************************************************************
25 * Altera NiosII YANU serial interface by Imagos
26 * please see http://www.opencores.org/project,yanu for
27 * information/downloads
28 ************************************************************************/
30 #ifndef __NIOS2_YANU_H__
31 #define __NIOS2_YANU_H__
33 #define YANU_MAX_PRESCALER_N ((1 << 4) - 1) /* 15 */
34 #define YANU_MAX_PRESCALER_M ((1 << 11) -1) /* 2047 */
35 #define YANU_FIFO_SIZE (16)
36 #define YANU_RXFIFO_SIZE (YANU_FIFO_SIZE)
37 #define YANU_TXFIFO_SIZE (YANU_FIFO_SIZE)
39 #define YANU_RXFIFO_DLY (10*11)
40 #define YANU_TXFIFO_THR (10)
41 #define YANU_DATA_CHAR_MASK (0xFF)
44 #define YANU_DATA_OFFSET (0) /* data register offset */
46 #define YANU_CONTROL_OFFSET (4) /* control register offset */
47 /* interrupt enable */
48 #define YANU_CONTROL_IE_RRDY (1<<0) /* ie on received character ready */
49 #define YANU_CONTROL_IE_OE (1<<1) /* ie on rx overrun */
50 #define YANU_CONTROL_IE_BRK (1<<2) /* ie on break detect */
51 #define YANU_CONTROL_IE_FE (1<<3) /* ie on framing error */
52 #define YANU_CONTROL_IE_PE (1<<4) /* ie on parity error */
53 #define YANU_CONTROL_IE_TRDY (1<<5) /* ie interrupt on tranmitter ready */
55 #define YANU_CONTROL_BITS_POS (6) /* bits number pos */
56 #define YANU_CONTROL_BITS (1<<YANU_CONTROL_BITS_POS) /* number of rx/tx bits per word. 3 bit unsigned integer */
57 #define YANU_CONTROL_BITS_N (3) /* ... its bit filed length */
58 #define YANU_CONTROL_PARENA (1<<9) /* enable parity bit transmission/reception */
59 #define YANU_CONTROL_PAREVEN (1<<10) /* parity even */
60 #define YANU_CONTROL_STOPS (1<<11) /* number of stop bits */
61 #define YANU_CONTROL_HHENA (1<<12) /* Harware Handshake enable... */
62 #define YANU_CONTROL_FORCEBRK (1<<13) /* if set than txd = active (0) */
64 #define YANU_CONTROL_RDYDLY (1<<14) /* delay from "first" before setting rrdy (in bit) */
65 #define YANU_CONTROL_RDYDLY_N (8) /* ... its bit filed length */
66 #define YANU_CONTROL_TXTHR (1<<22) /* tx interrupt threshold: the trdy set if txfifo_chars<= txthr (chars) */
67 #define YANU_CONTROL_TXTHR_N (4) /* ... its bit field length */
69 #define YANU_BAUD_OFFSET (8) /* baud register offset */
70 #define YANU_BAUDM (1<<0) /* baud mantissa lsb */
71 #define YANU_BAUDM_N (12) /* ...its bit filed length */
72 #define YANU_BAUDE (1<<12) /* baud exponent lsb */
73 #define YANU_BAUDE_N (4) /* ...its bit field length */
75 #define YANU_ACTION_OFFSET (12) /* action register... write only */
76 #define YANU_ACTION_RRRDY (1<<0) /* reset rrdy */
77 #define YANU_ACTION_ROE (1<<1) /* reset oe */
78 #define YANU_ACTION_RBRK (1<<2) /* reset brk */
79 #define YANU_ACTION_RFE (1<<3) /* reset fe */
80 #define YANU_ACTION_RPE (1<<4) /* reset pe */
81 #define YANU_ACTION_SRRDY (1<<5) /* set rrdy */
82 #define YANU_ACTION_SOE (1<<6) /* set oe */
83 #define YANU_ACTION_SBRK (1<<7) /* set brk */
84 #define YANU_ACTION_SFE (1<<8) /* set fe */
85 #define YANU_ACTION_SPE (1<<9) /* set pe */
86 #define YANU_ACTION_RFIFO_PULL (1<<10) /* pull a char from rx fifo we MUST do it before taking a char */
87 #define YANU_ACTION_RFIFO_CLEAR (1<<11) /* clear rx fifo */
88 #define YANU_ACTION_TFIFO_CLEAR (1<<12) /* clear tx fifo */
89 #define YANU_ACTION_RTRDY (1<<13) /* clear trdy */
90 #define YANU_ACTION_STRDY (1<<14) /* set trdy */
92 #define YANU_STATUS_OFFSET (16)
93 #define YANU_STATUS_RRDY (1<<0) /* rxrdy flag */
94 #define YANU_STATUS_TRDY (1<<1) /* txrdy flag */
95 #define YANU_STATUS_OE (1<<2) /* rx overrun error */
96 #define YANU_STATUS_BRK (1<<3) /* rx break detect flag */
97 #define YANU_STATUS_FE (1<<4) /* rx framing error flag */
98 #define YANU_STATUS_PE (1<<5) /* rx parity erro flag */
99 #define YANU_RFIFO_CHARS_POS (6)
100 #define YANU_RFIFO_CHARS (1<<RFIFO_CHAR_POS) /* number of chars into rx fifo */
101 #define YANU_RFIFO_CHARS_N (5) /* ...its bit field length: 32 chars */
102 #define YANU_TFIFO_CHARS_POS (11)
103 #define YANU_TFIFO_CHARS (1<<TFIFO_CHAR_POS) /* number of chars into tx fifo */
104 #define YANU_TFIFO_CHARS_N (5) /* ...its bit field length: 32 chars */
106 typedef volatile struct yanu_uart_t {
107 volatile unsigned data;
108 volatile unsigned control; /* control register (RW) 32-bit */
109 volatile unsigned baud; /* baud/prescaler register (RW) 32-bit */
110 volatile unsigned action; /* action register (W) 32-bit */
111 volatile unsigned status; /* status register (R) 32-bit */
112 volatile unsigned magic; /* magic register (R) 32-bit */