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
143
144
145
146
147
148
149
150
|
/*
* (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
* Clean driver and add xilinx constant from header file
*
* (C) Copyright 2004 Atmark Techno, Inc.
* Yasushi SHOJI <yashi@atmark-techno.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#include <linux/compiler.h>
#include <serial.h>
#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
struct uartlite {
unsigned int rx_fifo;
unsigned int tx_fifo;
unsigned int status;
};
static struct uartlite *userial_ports[4] = {
#ifdef XILINX_UARTLITE_BASEADDR
[0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR,
#endif
#ifdef XILINX_UARTLITE_BASEADDR1
[1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
#endif
#ifdef XILINX_UARTLITE_BASEADDR2
[2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
#endif
#ifdef XILINX_UARTLITE_BASEADDR3
[3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3
#endif
};
void uartlite_serial_putc(const char c, const int port)
{
struct uartlite *regs = userial_ports[port];
if (c == '\n')
uartlite_serial_putc('\r', port);
while (in_be32(®s->status) & SR_TX_FIFO_FULL)
;
out_be32(®s->tx_fifo, c & 0xff);
}
void uartlite_serial_puts(const char *s, const int port)
{
while (*s)
uartlite_serial_putc(*s++, port);
}
int uartlite_serial_getc(const int port)
{
struct uartlite *regs = userial_ports[port];
while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
;
return in_be32(®s->rx_fifo) & 0xff;
}
int uartlite_serial_tstc(const int port)
{
struct uartlite *regs = userial_ports[port];
return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
}
static int uartlite_serial_init(const int port)
{
if (userial_ports[port])
return 0;
return -1;
}
/* Multi serial device functions */
#define DECLARE_ESERIAL_FUNCTIONS(port) \
int userial##port##_init(void) \
{ return uartlite_serial_init(port); } \
void userial##port##_setbrg(void) {} \
int userial##port##_getc(void) \
{ return uartlite_serial_getc(port); } \
int userial##port##_tstc(void) \
{ return uartlite_serial_tstc(port); } \
void userial##port##_putc(const char c) \
{ uartlite_serial_putc(c, port); } \
void userial##port##_puts(const char *s) \
{ uartlite_serial_puts(s, port); }
/* Serial device descriptor */
#define INIT_ESERIAL_STRUCTURE(port, __name) { \
.name = __name, \
.start = userial##port##_init, \
.stop = NULL, \
.setbrg = userial##port##_setbrg, \
.getc = userial##port##_getc, \
.tstc = userial##port##_tstc, \
.putc = userial##port##_putc, \
.puts = userial##port##_puts, \
}
DECLARE_ESERIAL_FUNCTIONS(0);
struct serial_device uartlite_serial0_device =
INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
DECLARE_ESERIAL_FUNCTIONS(1);
struct serial_device uartlite_serial1_device =
INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
DECLARE_ESERIAL_FUNCTIONS(2);
struct serial_device uartlite_serial2_device =
INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
DECLARE_ESERIAL_FUNCTIONS(3);
struct serial_device uartlite_serial3_device =
INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
__weak struct serial_device *default_serial_console(void)
{
if (userial_ports[0])
return &uartlite_serial0_device;
if (userial_ports[1])
return &uartlite_serial1_device;
if (userial_ports[2])
return &uartlite_serial2_device;
if (userial_ports[3])
return &uartlite_serial3_device;
return NULL;
}
void uartlite_serial_initialize(void)
{
#ifdef XILINX_UARTLITE_BASEADDR
serial_register(&uartlite_serial0_device);
#endif /* XILINX_UARTLITE_BASEADDR */
#ifdef XILINX_UARTLITE_BASEADDR1
serial_register(&uartlite_serial1_device);
#endif /* XILINX_UARTLITE_BASEADDR1 */
#ifdef XILINX_UARTLITE_BASEADDR2
serial_register(&uartlite_serial2_device);
#endif /* XILINX_UARTLITE_BASEADDR2 */
#ifdef XILINX_UARTLITE_BASEADDR3
serial_register(&uartlite_serial3_device);
#endif /* XILINX_UARTLITE_BASEADDR3 */
}
|
