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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* Console driver for pxa255 full function port by Yang Xi <hiyangxi@gmail.com>
* Copyright (c) 2004 by Jay Monkman <jtm@lopingdog.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <termios.h>
#include <pxa255.h>
#include <ffuart.h>
#include <rtems/bspIo.h>
#include <libchip/serial.h>
#include <libchip/sersupp.h>
volatile int dbg_dly;
/* static function prototypes */
static int ffuart_first_open(int major, int minor, void *arg);
static int ffuart_last_close(int major, int minor, void *arg);
static int ffuart_read(int minor);
static ssize_t ffuart_write(int minor, const char *buf, size_t len);
static void ffuart_init(int minor);
static void ffuart_write_polled(int minor, char c);
static int ffuart_set_attributes(int minor, const struct termios *t);
/* Pointers to functions for handling the UART. */
console_fns ffuart_fns =
{
libchip_serial_default_probe,
ffuart_first_open,
ffuart_last_close,
ffuart_read,
ffuart_write,
ffuart_init,
ffuart_write_polled, /* not used in this driver */
ffuart_set_attributes,
FALSE /* TRUE if interrupt driven, FALSE if not. */
};
/*
* This is called the first time each device is opened. Since
* the driver is polled, we don't have to do anything. If the driver
* were interrupt driven, we'd enable interrupts here.
*/
static int ffuart_first_open(int major, int minor, void *arg)
{
return 0;
}
/*
* This is called the last time each device is closed. Since
* the driver is polled, we don't have to do anything. If the driver
* were interrupt driven, we'd disable interrupts here.
*/
static int ffuart_last_close(int major, int minor, void *arg)
{
return 0;
}
/*
* Read one character from UART.
*
* return -1 if there's no data, otherwise return
* the character in lowest 8 bits of returned int.
*/
static int ffuart_read(int minor)
{
char c;
console_tbl *console_entry;
ffuart_reg_t *ffuart;
console_entry = BSP_get_uart_from_minor(minor);
if (console_entry == NULL) {
return -1;
}
ffuart = (ffuart_reg_t *)console_entry->ulCtrlPort1;
if (!(ffuart->lsr & FULL_RECEIVE)) {
return -1;
}
c = ffuart->rbr & 0xff;
return c;
}
/*
* Write buffer to UART
*
* return 1 on success, -1 on error
*/
static ssize_t ffuart_write(int minor, const char *buf, size_t len)
{
size_t i, x;
char c;
console_tbl *console_entry;
ffuart_reg_t *ffuart;
console_entry = BSP_get_uart_from_minor(minor);
if (console_entry == NULL) {
return -1;
}
ffuart = (ffuart_reg_t *)console_entry->ulCtrlPort1;
for (i = 0; i < len; i++) {
while(1) {
if (ffuart->lsr & SEND_EMPTY) {
break;
}
}
c = (char) buf[i];
#if ON_SKYEYE != 1
if(c=='\n'){
ffuart->rbr = '\r';
for (x = 0; x < 100; x++) {
dbg_dly++; /* using a global so this doesn't get optimized out */
}
while(1){
if(ffuart->lsr & SEND_EMPTY){
break;
}
}
}
#endif
ffuart->rbr = c;
/* the TXRDY flag does not seem to update right away (is this true?) */
/* so we wait a bit before continuing */
for (x = 0; x < 100; x++) {
dbg_dly++; /* using a global so this doesn't get optimized out */
}
}
return 1;
}
static void ffuart_init(int minor)
{
console_tbl *console_entry;
ffuart_reg_t *ffuart;
unsigned int divisor;
console_entry = BSP_get_uart_from_minor(minor);
if (console_entry == NULL) {
return;
}
ffuart = (ffuart_reg_t *)console_entry->ulCtrlPort1;
ffuart->lcr |= DLAB;
/*Set the Bound*/
ffuart->lcr |= DLAB;
divisor = FREQUENCY_UART / (115200*16);
ffuart->rbr = divisor & 0xff;
ffuart->ier = (divisor >> 8)&0xff;
/*Disable FIFO*/
ffuart->iir = 0;
ffuart->lcr &=~DLAB;
/*Enable UART*/
ffuart->ier = 0x40;
ffuart->lcr = EIGHT_BITS_NOPARITY_1STOPBIT;
}
/* I'm not sure this is needed for the shared console driver. */
static void ffuart_write_polled(int minor, char c)
{
ffuart_write(minor, &c, 1);
}
/* This is for setting baud rate, bits, etc. */
static int ffuart_set_attributes(int minor, const struct termios *t)
{
return 0;
}
/***********************************************************************/
/*
* The following functions are not used by TERMIOS, but other RTEMS
* functions use them instead.
*/
/***********************************************************************/
/*
* Read from UART. This is used in the exit code, and can't
* rely on interrupts.
*/
int ffuart_poll_read(int minor)
{
return ffuart_read(minor);
}
/*
* Write a character to the console. This is used by printk() and
* maybe other low level functions. It should not use interrupts or any
* RTEMS system calls. It needs to be very simple
*/
static void _BSP_put_char( char c ) {
ffuart_write_polled(0, c);
}
static int _BSP_poll_char(void) {
return ffuart_poll_read(0);
}
BSP_output_char_function_type BSP_output_char = _BSP_put_char;
BSP_polling_getchar_function_type BSP_poll_char = _BSP_poll_char;
|
