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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Ondrej Palkovsky |
2 | * Copyright (C) 2005 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <interrupt.h> |
29 | #include <interrupt.h> |
30 | #include <arch/cp0.h> |
30 | #include <arch/cp0.h> |
31 | #include <arch/drivers/serial.h> |
31 | #include <arch/drivers/serial.h> |
32 | #include <console/chardev.h> |
32 | #include <console/chardev.h> |
33 | #include <console/console.h> |
33 | #include <console/console.h> |
34 | 34 | ||
35 | static chardev_t console; |
35 | static chardev_t console; |
36 | static serial_t sconf[SERIAL_MAX]; |
36 | static serial_t sconf[SERIAL_MAX]; |
37 | static bool kb_enabled; |
37 | static bool kb_enabled; |
38 | 38 | ||
39 | static void serial_write(chardev_t *d, const char ch) |
39 | static void serial_write(chardev_t *d, const char ch) |
40 | { |
40 | { |
41 | int i; |
41 | int i; |
42 | serial_t *sd = (serial_t *)d->data; |
42 | serial_t *sd = (serial_t *)d->data; |
43 | 43 | ||
44 | if (ch == '\n') |
44 | if (ch == '\n') |
45 | serial_write(d, '\r'); |
45 | serial_write(d, '\r'); |
46 | /* Wait until transmit buffer empty */ |
46 | /* Wait until transmit buffer empty */ |
47 | while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT))) |
47 | while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT))) |
48 | ; |
48 | ; |
49 | SERIAL_WRITE(sd->port, ch); |
49 | SERIAL_WRITE(sd->port, ch); |
50 | } |
50 | } |
51 | 51 | ||
52 | static void serial_enable(chardev_t *d) |
52 | static void serial_enable(chardev_t *d) |
53 | { |
53 | { |
54 | kb_enabled = true; |
54 | kb_enabled = true; |
55 | } |
55 | } |
56 | 56 | ||
57 | static void serial_disable(chardev_t *d) |
57 | static void serial_disable(chardev_t *d) |
58 | { |
58 | { |
59 | kb_enabled = false; |
59 | kb_enabled = false; |
60 | } |
60 | } |
61 | 61 | ||
62 | int serial_init(void) |
62 | int serial_init(void) |
63 | { |
63 | { |
64 | int i = 0; |
64 | int i = 0; |
65 | if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) { |
65 | if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) { |
66 | sconf[i].port = SERIAL_COM1; |
66 | sconf[i].port = SERIAL_COM1; |
67 | sconf[i].irq = SERIAL_COM1_IRQ; |
67 | sconf[i].irq = SERIAL_COM1_IRQ; |
68 | /* Enable interrupt on available data */ |
68 | /* Enable interrupt on available data */ |
69 | i++; |
69 | i++; |
70 | } |
70 | } |
71 | return i; |
71 | return i; |
72 | } |
72 | } |
73 | 73 | ||
- | 74 | /** Read character from serial port, wait until available */ |
|
74 | static chardev_operations_t serial_ops = { |
75 | static char serial_do_read(chardev_t *dev) |
- | 76 | { |
|
75 | .resume = serial_enable, |
77 | serial_t *sd = (serial_t *)dev->data; |
- | 78 | char ch; |
|
- | 79 | ||
- | 80 | while (!(SERIAL_READ_LSR(sd->port) & 1)) |
|
- | 81 | ; |
|
76 | .suspend = serial_disable, |
82 | ch = SERIAL_READ(sd->port); |
- | 83 | ||
77 | .write = serial_write |
84 | if (ch =='\r') |
- | 85 | ch = '\n'; |
|
- | 86 | return ch; |
|
78 | }; |
87 | } |
- | 88 | ||
79 | 89 | ||
80 | /** Process keyboard interrupt. Does not work in simics? */ |
90 | /** Process keyboard interrupt. Does not work in simics? */ |
81 | static void serial_interrupt(int n, void *stack) |
91 | static void serial_interrupt(int n, void *stack) |
82 | { |
92 | { |
83 | serial_t *sd = (serial_t *)console.data; |
93 | serial_t *sd = (serial_t *)console.data; |
84 | char ch; |
94 | char ch; |
85 | 95 | ||
86 | if (!(SERIAL_READ_LSR(sd->port) & 1)) |
96 | if (!(SERIAL_READ_LSR(sd->port) & 1)) |
87 | return; |
97 | return; |
88 | ch = SERIAL_READ(sd->port); |
98 | ch = SERIAL_READ(sd->port); |
89 | 99 | ||
90 | if (ch =='\r') |
100 | if (ch =='\r') |
91 | ch = '\n'; |
101 | ch = '\n'; |
92 | chardev_push_character(&console, ch); |
102 | chardev_push_character(&console, ch); |
93 | } |
103 | } |
94 | 104 | ||
95 | 105 | ||
- | 106 | ||
- | 107 | static chardev_operations_t serial_ops = { |
|
- | 108 | .resume = serial_enable, |
|
- | 109 | .suspend = serial_disable, |
|
- | 110 | .write = serial_write, |
|
- | 111 | .read = serial_do_read |
|
- | 112 | }; |
|
- | 113 | ||
96 | iroutine old_timer; |
114 | iroutine old_timer; |
97 | /** Do polling on timer interrupt */ |
115 | /** Do polling on timer interrupt */ |
98 | static void timer_replace(int n, void *stack) |
116 | static void timer_replace(int n, void *stack) |
99 | { |
117 | { |
100 | old_timer(n, stack); |
118 | old_timer(n, stack); |
101 | serial_interrupt(n, stack); |
119 | serial_interrupt(n, stack); |
102 | } |
120 | } |
103 | 121 | ||
104 | void serial_console(void) |
122 | void serial_console(void) |
105 | { |
123 | { |
106 | serial_t *sd = &sconf[0]; |
124 | serial_t *sd = &sconf[0]; |
107 | 125 | ||
108 | 126 | ||
109 | chardev_initialize("serial_console", &console, &serial_ops); |
127 | chardev_initialize("serial_console", &console, &serial_ops); |
110 | console.data = sd; |
128 | console.data = sd; |
111 | kb_enabled = true; |
129 | kb_enabled = true; |
112 | 130 | ||
113 | // int_register(2, "serial_drvr", serial_interrupt); |
131 | // int_register(2, "serial_drvr", serial_interrupt); |
114 | /* I don't know why, but the serial interrupts simply |
132 | /* I don't know why, but the serial interrupts simply |
115 | * don't work on simics |
133 | * don't work on simics |
116 | */ |
134 | */ |
117 | old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace); |
135 | old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace); |
118 | 136 | ||
119 | stdin = &console; |
137 | stdin = &console; |
120 | stdout = &console; |
138 | stdout = &console; |
121 | } |
139 | } |
122 | 140 |