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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2006 Jakub Jermar |
2 | * Copyright (c) 2001-2006 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 <ipc/irq.h> |
43 | #include <ipc/irq.h> |
44 | #include <cpu.h> |
44 | #include <cpu.h> |
45 | #include <arch/asm.h> |
45 | #include <arch/asm.h> |
46 | #include <arch.h> |
46 | #include <arch.h> |
47 | #include <console/chardev.h> |
47 | #include <console/chardev.h> |
48 | #include <console/console.h> |
48 | #include <console/console.h> |
49 | #include <interrupt.h> |
49 | #include <interrupt.h> |
50 | #include <arch/interrupt.h> |
50 | #include <arch/interrupt.h> |
51 | #include <sysinfo/sysinfo.h> |
51 | #include <sysinfo/sysinfo.h> |
52 | #include <synch/spinlock.h> |
52 | #include <synch/spinlock.h> |
53 | #include <mm/slab.h> |
53 | #include <mm/slab.h> |
54 | 54 | ||
55 | #define LSR_DATA_READY 0x01 |
55 | #define LSR_DATA_READY 0x01 |
56 | 56 | ||
57 | static irq_t *ns16550_irq; |
57 | static irq_t *ns16550_irq; |
58 | 58 | ||
59 | /* |
59 | /* |
60 | * These codes read from ns16550 data register are silently ignored. |
60 | * These codes read from ns16550 data register are silently ignored. |
61 | */ |
61 | */ |
62 | #define IGNORE_CODE 0x7f /* all keys up */ |
62 | #define IGNORE_CODE 0x7f /* all keys up */ |
63 | 63 | ||
64 | static void ns16550_suspend(chardev_t *); |
64 | static void ns16550_suspend(chardev_t *); |
65 | static void ns16550_resume(chardev_t *); |
65 | static void ns16550_resume(chardev_t *); |
66 | 66 | ||
67 | static chardev_operations_t ops = { |
67 | static chardev_operations_t ops = { |
68 | .suspend = ns16550_suspend, |
68 | .suspend = ns16550_suspend, |
69 | .resume = ns16550_resume, |
69 | .resume = ns16550_resume, |
70 | }; |
70 | }; |
71 | 71 | ||
72 | /** Initialize keyboard and service interrupts using kernel routine */ |
72 | /** Initialize keyboard and service interrupts using kernel routine */ |
73 | void ns16550_grab(void) |
73 | void ns16550_grab(void) |
74 | { |
74 | { |
75 | ipl_t ipl = interrupts_disable(); |
75 | ipl_t ipl = interrupts_disable(); |
76 | spinlock_lock(&ns16550_irq->lock); |
76 | spinlock_lock(&ns16550_irq->lock); |
77 | ns16550_irq->notif_cfg.notify = false; |
77 | ns16550_irq->notif_cfg.notify = false; |
78 | spinlock_unlock(&ns16550_irq->lock); |
78 | spinlock_unlock(&ns16550_irq->lock); |
79 | interrupts_restore(ipl); |
79 | interrupts_restore(ipl); |
80 | } |
80 | } |
81 | 81 | ||
82 | /** Resume the former interrupt vector */ |
82 | /** Resume the former interrupt vector */ |
83 | void ns16550_release(void) |
83 | void ns16550_release(void) |
84 | { |
84 | { |
85 | ipl_t ipl = interrupts_disable(); |
85 | ipl_t ipl = interrupts_disable(); |
86 | spinlock_lock(&ns16550_irq->lock); |
86 | spinlock_lock(&ns16550_irq->lock); |
87 | if (ns16550_irq->notif_cfg.answerbox) |
87 | if (ns16550_irq->notif_cfg.answerbox) |
88 | ns16550_irq->notif_cfg.notify = true; |
88 | ns16550_irq->notif_cfg.notify = true; |
89 | spinlock_unlock(&ns16550_irq->lock); |
89 | spinlock_unlock(&ns16550_irq->lock); |
90 | interrupts_restore(ipl); |
90 | interrupts_restore(ipl); |
91 | } |
91 | } |
92 | 92 | ||
93 | /** Initialize ns16550. |
93 | /** Initialize ns16550. |
94 | * |
94 | * |
95 | * @param dev Addrress of the beginning of the device in I/O space. |
95 | * @param dev Addrress of the beginning of the device in I/O space. |
96 | * @param devno Device number. |
96 | * @param devno Device number. |
97 | * @param inr Interrupt number. |
97 | * @param inr Interrupt number. |
98 | * @param cir Clear interrupt function. |
98 | * @param cir Clear interrupt function. |
99 | * @param cir_arg First argument to cir. |
99 | * @param cir_arg First argument to cir. |
100 | * |
100 | * |
101 | * @return True on success, false on failure. |
101 | * @return True on success, false on failure. |
102 | */ |
102 | */ |
103 | bool |
103 | bool |
104 | ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
104 | ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
105 | { |
105 | { |
106 | ns16550_instance_t *instance; |
106 | ns16550_instance_t *instance; |
107 | 107 | ||
108 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
108 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
109 | stdin = &kbrd; |
109 | stdin = &kbrd; |
110 | 110 | ||
111 | instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
111 | instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
112 | if (!instance) |
112 | if (!instance) |
113 | return false; |
113 | return false; |
114 | 114 | ||
115 | instance->devno = devno; |
115 | instance->devno = devno; |
116 | instance->ns16550 = dev; |
116 | instance->ns16550 = dev; |
117 | 117 | ||
118 | irq_initialize(&instance->irq); |
118 | irq_initialize(&instance->irq); |
119 | instance->irq.devno = devno; |
119 | instance->irq.devno = devno; |
120 | instance->irq.inr = inr; |
120 | instance->irq.inr = inr; |
121 | instance->irq.claim = ns16550_claim; |
121 | instance->irq.claim = ns16550_claim; |
122 | instance->irq.handler = ns16550_irq_handler; |
122 | instance->irq.handler = ns16550_irq_handler; |
123 | instance->irq.instance = instance; |
123 | instance->irq.instance = instance; |
124 | instance->irq.cir = cir; |
124 | instance->irq.cir = cir; |
125 | instance->irq.cir_arg = cir_arg; |
125 | instance->irq.cir_arg = cir_arg; |
126 | irq_register(&instance->irq); |
126 | irq_register(&instance->irq); |
127 | 127 | ||
128 | ns16550_irq = &instance->irq; /* TODO: remove me soon */ |
128 | ns16550_irq = &instance->irq; /* TODO: remove me soon */ |
129 | 129 | ||
130 | while ((pio_read_8(&dev->lsr) & LSR_DATA_READY)) |
130 | while ((pio_read_8(&dev->lsr) & LSR_DATA_READY)) |
131 | (void) pio_read_8(&dev->rbr); |
131 | (void) pio_read_8(&dev->rbr); |
132 | 132 | ||
133 | sysinfo_set_item_val("kbd", NULL, true); |
133 | sysinfo_set_item_val("kbd", NULL, true); |
134 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
134 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
135 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
135 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
136 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
136 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
137 | sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) dev); |
137 | sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) dev); |
138 | sysinfo_set_item_val("kbd.port", NULL, (uintptr_t) dev); |
138 | sysinfo_set_item_val("kbd.port", NULL, (uintptr_t) dev); |
139 | 139 | ||
140 | /* Enable interrupts */ |
140 | /* Enable interrupts */ |
141 | pio_write_8(&dev->ier, IER_ERBFI); |
141 | pio_write_8(&dev->ier, IER_ERBFI); |
142 | pio_write_8(&dev->mcr, MCR_OUT2); |
142 | pio_write_8(&dev->mcr, MCR_OUT2); |
143 | 143 | ||
144 | ns16550_grab(); |
144 | ns16550_grab(); |
145 | 145 | ||
146 | return true; |
146 | return true; |
147 | } |
147 | } |
148 | 148 | ||
149 | /* Called from getc(). */ |
149 | /* Called from getc(). */ |
150 | void ns16550_resume(chardev_t *d) |
150 | void ns16550_resume(chardev_t *d) |
151 | { |
151 | { |
152 | } |
152 | } |
153 | 153 | ||
154 | /* Called from getc(). */ |
154 | /* Called from getc(). */ |
155 | void ns16550_suspend(chardev_t *d) |
155 | void ns16550_suspend(chardev_t *d) |
156 | { |
156 | { |
157 | } |
157 | } |
158 | 158 | ||
159 | irq_ownership_t ns16550_claim(void *instance) |
159 | irq_ownership_t ns16550_claim(irq_t *irq) |
160 | { |
160 | { |
161 | ns16550_instance_t *ns16550_instance = instance; |
161 | ns16550_instance_t *ns16550_instance = irq->instance; |
162 | ns16550_t *dev = ns16550_instance->ns16550; |
162 | ns16550_t *dev = ns16550_instance->ns16550; |
163 | 163 | ||
164 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
164 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
165 | return IRQ_ACCEPT; |
165 | return IRQ_ACCEPT; |
166 | else |
166 | else |
167 | return IRQ_DECLINE; |
167 | return IRQ_DECLINE; |
168 | } |
168 | } |
169 | 169 | ||
170 | void ns16550_irq_handler(irq_t *irq) |
170 | void ns16550_irq_handler(irq_t *irq) |
171 | { |
171 | { |
172 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) { |
172 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) { |
173 | /* |
173 | /* |
174 | * This will hopefully go to the IRQ dispatch code soon. |
174 | * This will hopefully go to the IRQ dispatch code soon. |
175 | */ |
175 | */ |
176 | ipc_irq_send_notif(irq); |
176 | ipc_irq_send_notif(irq); |
177 | return; |
177 | return; |
178 | } |
178 | } |
179 | 179 | ||
180 | ns16550_instance_t *ns16550_instance = irq->instance; |
180 | ns16550_instance_t *ns16550_instance = irq->instance; |
181 | ns16550_t *dev = ns16550_instance->ns16550; |
181 | ns16550_t *dev = ns16550_instance->ns16550; |
182 | 182 | ||
183 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
183 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
184 | uint8_t x; |
184 | uint8_t x; |
185 | 185 | ||
186 | x = pio_read_8(&dev->rbr); |
186 | x = pio_read_8(&dev->rbr); |
187 | 187 | ||
188 | if (x != IGNORE_CODE) { |
188 | if (x != IGNORE_CODE) { |
189 | if (x & KEY_RELEASE) |
189 | if (x & KEY_RELEASE) |
190 | key_released(x ^ KEY_RELEASE); |
190 | key_released(x ^ KEY_RELEASE); |
191 | else |
191 | else |
192 | key_pressed(x); |
192 | key_pressed(x); |
193 | } |
193 | } |
194 | } |
194 | } |
195 | 195 | ||
196 | } |
196 | } |
197 | 197 | ||
198 | /** @} |
198 | /** @} |
199 | */ |
199 | */ |
200 | 200 |