1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*-
* Copyright (c) 2012 M. Warner Losh. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#define _ARM32_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91board.h>
#include <arm/at91/at91rm92reg.h>
#include <arm/at91/at91rm9200var.h>
#include <arm/at91/at91_pioreg.h>
#include <arm/at91/at91_piovar.h>
/*
* The AT91RM9200 uses the same silicon for both the BGA and PQFP
* packages. There's no documented way to detect this at runtime,
* so we require the board code to register what type of SoC is on the
* board in question. The pinouts are not quite compatible, and we
* use this information to cope with the slight differences.
*/
void
at91rm9200_set_subtype(enum at91_soc_subtype st)
{
switch (st) {
case AT91_ST_RM9200_BGA:
case AT91_ST_RM9200_PQFP:
soc_info.subtype = st;
break;
default:
panic("Bad SoC subtype %d for at91rm9200_set_subtype.", st);
break;
}
}
void
at91rm9200_config_uart(unsigned devid, unsigned unit, unsigned pinmask)
{
/*
* Since the USART supports RS-485 multidrop mode, it allows the
* TX pins to float. However, for RS-232 operations, we don't want
* these pins to float. Instead, they should be pulled up to avoid
* mismatches. Linux does something similar when it configures the
* TX lines. This implies that we also allow the RX lines to float
* rather than be in the state they are left in by the boot loader.
* Since they are input pins, I think that this is the right thing
* to do.
*/
/*
* Current boards supported don't need the extras, but they should be
* implemented. But that should wait until the new pin api goes in.
*/
switch (devid) {
case AT91_ID_DBGU:
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA30, 0); /* DRXD */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA31, 1); /* DTXD */
break;
case AT91RM9200_ID_USART0:
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA17, 1); /* TXD0 */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA18, 0); /* RXD0 */
/* CTS PA20 */
/* RTS -- errata #39 PA21 */
break;
case AT91RM9200_ID_USART1:
at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PIO_PB20, 1); /* TXD1 */
at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PIO_PB21, 0); /* RXD1 */
/* RI - PB18 */
/* DTR - PB19 */
/* DCD - PB23 */
/* CTS - PB24 */
/* DSR - PB25 */
/* RTS - PB26 */
break;
case AT91RM9200_ID_USART2:
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA22, 0); /* RXD2 */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA23, 1); /* TXD2 */
/* CTS - PA30 B periph */
/* RTS - PA31 B periph */
break;
case AT91RM9200_ID_USART3:
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PIO_PA5, 1); /* TXD3 */
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PIO_PA6, 0); /* RXD3 */
/* CTS - PB0 B periph */
/* RTS - PB1 B periph */
break;
default:
break;
}
}
void
at91rm9200_config_mci(int has_4wire)
{
/* XXX TODO chip changed GPIO, other slots, etc */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA27, 0); /* MCCK */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA28, 1); /* MCCDA */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA29, 1); /* MCDA0 */
if (has_4wire) {
at91_pio_use_periph_b(AT91RM92_PIOB_BASE, AT91C_PIO_PB3, 1); /* MCDA1 */
at91_pio_use_periph_b(AT91RM92_PIOB_BASE, AT91C_PIO_PB4, 1); /* MCDA2 */
at91_pio_use_periph_b(AT91RM92_PIOB_BASE, AT91C_PIO_PB5, 1); /* MCDA3 */
}
}
|
