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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2006 Jakub Jermar |
2 | * Copyright (c) 2009 Jakub Jermar |
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 | /** @addtogroup genarch |
29 | /** @addtogroup genarch |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief NS 16550 serial port / keyboard driver. |
34 | * @brief NS 16550 serial port / keyboard driver. |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <genarch/kbd/ns16550.h> |
37 | #include <genarch/kbd/ns16550.h> |
38 | #include <genarch/kbd/key.h> |
38 | #include <genarch/kbd/key.h> |
39 | #include <genarch/kbd/scanc.h> |
39 | #include <genarch/kbd/scanc.h> |
40 | #include <genarch/kbd/scanc_sun.h> |
40 | #include <genarch/kbd/scanc_sun.h> |
41 | #include <arch/drivers/kbd.h> |
41 | #include <arch/drivers/kbd.h> |
42 | #include <ddi/irq.h> |
42 | #include <ddi/irq.h> |
43 | #include <cpu.h> |
43 | #include <cpu.h> |
44 | #include <arch/asm.h> |
44 | #include <arch/asm.h> |
45 | #include <arch.h> |
45 | #include <arch.h> |
46 | #include <console/chardev.h> |
46 | #include <console/chardev.h> |
47 | #include <console/console.h> |
47 | #include <console/console.h> |
48 | #include <interrupt.h> |
48 | #include <interrupt.h> |
49 | #include <arch/interrupt.h> |
49 | #include <arch/interrupt.h> |
50 | #include <sysinfo/sysinfo.h> |
- | |
51 | #include <synch/spinlock.h> |
50 | #include <synch/spinlock.h> |
52 | #include <mm/slab.h> |
51 | #include <mm/slab.h> |
53 | 52 | ||
54 | #define LSR_DATA_READY 0x01 |
53 | #define LSR_DATA_READY 0x01 |
55 | 54 | ||
56 | /* |
55 | /* |
57 | * These codes read from ns16550 data register are silently ignored. |
56 | * These codes read from ns16550 data register are silently ignored. |
58 | */ |
57 | */ |
59 | #define IGNORE_CODE 0x7f /* all keys up */ |
58 | #define IGNORE_CODE 0x7f /* all keys up */ |
60 | 59 | ||
61 | static void ns16550_suspend(chardev_t *); |
60 | static void ns16550_suspend(chardev_t *); |
62 | static void ns16550_resume(chardev_t *); |
61 | static void ns16550_resume(chardev_t *); |
63 | 62 | ||
64 | static chardev_operations_t ops = { |
63 | static chardev_operations_t ops = { |
65 | .suspend = ns16550_suspend, |
64 | .suspend = ns16550_suspend, |
66 | .resume = ns16550_resume, |
65 | .resume = ns16550_resume, |
67 | }; |
66 | }; |
68 | 67 | ||
69 | /** Initialize ns16550. |
68 | /** Initialize ns16550. |
70 | * |
69 | * |
71 | * @param dev Addrress of the beginning of the device in I/O space. |
70 | * @param dev Addrress of the beginning of the device in I/O space. |
72 | * @param devno Device number. |
71 | * @param devno Device number. |
73 | * @param inr Interrupt number. |
72 | * @param inr Interrupt number. |
74 | * @param cir Clear interrupt function. |
73 | * @param cir Clear interrupt function. |
75 | * @param cir_arg First argument to cir. |
74 | * @param cir_arg First argument to cir. |
76 | * |
75 | * |
77 | * @return True on success, false on failure. |
76 | * @return True on success, false on failure. |
78 | */ |
77 | */ |
79 | bool |
78 | bool |
80 | ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
79 | ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
81 | { |
80 | { |
82 | ns16550_instance_t *instance; |
81 | ns16550_instance_t *instance; |
83 | 82 | ||
84 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
83 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
85 | stdin = &kbrd; |
84 | stdin = &kbrd; |
86 | 85 | ||
87 | instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
86 | instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
88 | if (!instance) |
87 | if (!instance) |
89 | return false; |
88 | return false; |
90 | 89 | ||
91 | instance->devno = devno; |
90 | instance->devno = devno; |
92 | instance->ns16550 = dev; |
91 | instance->ns16550 = dev; |
93 | 92 | ||
94 | irq_initialize(&instance->irq); |
93 | irq_initialize(&instance->irq); |
95 | instance->irq.devno = devno; |
94 | instance->irq.devno = devno; |
96 | instance->irq.inr = inr; |
95 | instance->irq.inr = inr; |
97 | instance->irq.claim = ns16550_claim; |
96 | instance->irq.claim = ns16550_claim; |
98 | instance->irq.handler = ns16550_irq_handler; |
97 | instance->irq.handler = ns16550_irq_handler; |
99 | instance->irq.instance = instance; |
98 | instance->irq.instance = instance; |
100 | instance->irq.cir = cir; |
99 | instance->irq.cir = cir; |
101 | instance->irq.cir_arg = cir_arg; |
100 | instance->irq.cir_arg = cir_arg; |
102 | irq_register(&instance->irq); |
101 | irq_register(&instance->irq); |
103 | 102 | ||
104 | while ((pio_read_8(&dev->lsr) & LSR_DATA_READY)) |
103 | while ((pio_read_8(&dev->lsr) & LSR_DATA_READY)) |
105 | (void) pio_read_8(&dev->rbr); |
104 | (void) pio_read_8(&dev->rbr); |
106 | 105 | ||
107 | /* |
- | |
108 | * This is the necessary evil until the userspace driver is entirely |
- | |
109 | * self-sufficient. |
- | |
110 | */ |
- | |
111 | sysinfo_set_item_val("kbd", NULL, true); |
- | |
112 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
- | |
113 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
- | |
114 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
- | |
115 | sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) dev); |
- | |
116 | sysinfo_set_item_val("kbd.port", NULL, (uintptr_t) dev); |
- | |
117 | - | ||
118 | /* Enable interrupts */ |
106 | /* Enable interrupts */ |
119 | pio_write_8(&dev->ier, IER_ERBFI); |
107 | pio_write_8(&dev->ier, IER_ERBFI); |
120 | pio_write_8(&dev->mcr, MCR_OUT2); |
108 | pio_write_8(&dev->mcr, MCR_OUT2); |
121 | 109 | ||
122 | return true; |
110 | return true; |
123 | } |
111 | } |
124 | 112 | ||
125 | /* Called from getc(). */ |
113 | /* Called from getc(). */ |
126 | void ns16550_resume(chardev_t *d) |
114 | void ns16550_resume(chardev_t *d) |
127 | { |
115 | { |
128 | } |
116 | } |
129 | 117 | ||
130 | /* Called from getc(). */ |
118 | /* Called from getc(). */ |
131 | void ns16550_suspend(chardev_t *d) |
119 | void ns16550_suspend(chardev_t *d) |
132 | { |
120 | { |
133 | } |
121 | } |
134 | 122 | ||
135 | irq_ownership_t ns16550_claim(irq_t *irq) |
123 | irq_ownership_t ns16550_claim(irq_t *irq) |
136 | { |
124 | { |
137 | ns16550_instance_t *ns16550_instance = irq->instance; |
125 | ns16550_instance_t *ns16550_instance = irq->instance; |
138 | ns16550_t *dev = ns16550_instance->ns16550; |
126 | ns16550_t *dev = ns16550_instance->ns16550; |
139 | 127 | ||
140 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
128 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
141 | return IRQ_ACCEPT; |
129 | return IRQ_ACCEPT; |
142 | else |
130 | else |
143 | return IRQ_DECLINE; |
131 | return IRQ_DECLINE; |
144 | } |
132 | } |
145 | 133 | ||
146 | void ns16550_irq_handler(irq_t *irq) |
134 | void ns16550_irq_handler(irq_t *irq) |
147 | { |
135 | { |
148 | ns16550_instance_t *ns16550_instance = irq->instance; |
136 | ns16550_instance_t *ns16550_instance = irq->instance; |
149 | ns16550_t *dev = ns16550_instance->ns16550; |
137 | ns16550_t *dev = ns16550_instance->ns16550; |
150 | 138 | ||
151 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
139 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
152 | uint8_t x; |
140 | uint8_t x; |
153 | 141 | ||
154 | x = pio_read_8(&dev->rbr); |
142 | x = pio_read_8(&dev->rbr); |
155 | 143 | ||
156 | if (x != IGNORE_CODE) { |
144 | if (x != IGNORE_CODE) { |
157 | if (x & KEY_RELEASE) |
145 | if (x & KEY_RELEASE) |
158 | key_released(x ^ KEY_RELEASE); |
146 | key_released(x ^ KEY_RELEASE); |
159 | else |
147 | else |
160 | key_pressed(x); |
148 | key_pressed(x); |
161 | } |
149 | } |
162 | } |
150 | } |
163 | 151 | ||
164 | } |
152 | } |
165 | 153 | ||
166 | /** @} |
154 | /** @} |
167 | */ |
155 | */ |
168 | 156 |