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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 | 53 | ||
54 | #define LSR_DATA_READY 0x01 |
54 | #define LSR_DATA_READY 0x01 |
55 | 55 | ||
56 | /** Structure representing the ns16550. */ |
56 | /** Structure representing the ns16550. */ |
57 | static ns16550_t ns16550; |
57 | static ns16550_t ns16550; |
58 | 58 | ||
59 | /** Structure for ns16550's IRQ. */ |
59 | /** Structure for ns16550's IRQ. */ |
60 | static irq_t ns16550_irq; |
60 | static irq_t ns16550_irq; |
61 | 61 | ||
62 | /* |
62 | /* |
63 | * These codes read from ns16550 data register are silently ignored. |
63 | * These codes read from ns16550 data register are silently ignored. |
64 | */ |
64 | */ |
65 | #define IGNORE_CODE 0x7f /* all keys up */ |
65 | #define IGNORE_CODE 0x7f /* all keys up */ |
66 | 66 | ||
67 | static void ns16550_suspend(chardev_t *); |
67 | static void ns16550_suspend(chardev_t *); |
68 | static void ns16550_resume(chardev_t *); |
68 | static void ns16550_resume(chardev_t *); |
69 | 69 | ||
70 | static chardev_operations_t ops = { |
70 | static chardev_operations_t ops = { |
71 | .suspend = ns16550_suspend, |
71 | .suspend = ns16550_suspend, |
72 | .resume = ns16550_resume, |
72 | .resume = ns16550_resume, |
73 | .read = ns16550_key_read |
73 | .read = ns16550_key_read |
74 | }; |
74 | }; |
75 | 75 | ||
76 | void ns16550_interrupt(void); |
76 | void ns16550_interrupt(void); |
77 | 77 | ||
78 | /** Initialize keyboard and service interrupts using kernel routine */ |
78 | /** Initialize keyboard and service interrupts using kernel routine */ |
79 | void ns16550_grab(void) |
79 | void ns16550_grab(void) |
80 | { |
80 | { |
81 | ipl_t ipl = interrupts_disable(); |
81 | ipl_t ipl = interrupts_disable(); |
82 | 82 | ||
83 | ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */ |
83 | ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */ |
84 | 84 | ||
85 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) |
85 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) |
86 | (void) ns16550_rbr_read(&ns16550); |
86 | (void) ns16550_rbr_read(&ns16550); |
87 | 87 | ||
88 | spinlock_lock(&ns16550_irq.lock); |
88 | spinlock_lock(&ns16550_irq.lock); |
89 | ns16550_irq.notif_cfg.notify = false; |
89 | ns16550_irq.notif_cfg.notify = false; |
90 | spinlock_unlock(&ns16550_irq.lock); |
90 | spinlock_unlock(&ns16550_irq.lock); |
91 | interrupts_restore(ipl); |
91 | interrupts_restore(ipl); |
92 | } |
92 | } |
93 | 93 | ||
94 | /** Resume the former interrupt vector */ |
94 | /** Resume the former interrupt vector */ |
95 | void ns16550_release(void) |
95 | void ns16550_release(void) |
96 | { |
96 | { |
97 | ipl_t ipl = interrupts_disable(); |
97 | ipl_t ipl = interrupts_disable(); |
98 | spinlock_lock(&ns16550_irq.lock); |
98 | spinlock_lock(&ns16550_irq.lock); |
99 | if (ns16550_irq.notif_cfg.answerbox) |
99 | if (ns16550_irq.notif_cfg.answerbox) |
100 | ns16550_irq.notif_cfg.notify = true; |
100 | ns16550_irq.notif_cfg.notify = true; |
101 | spinlock_unlock(&ns16550_irq.lock); |
101 | spinlock_unlock(&ns16550_irq.lock); |
102 | interrupts_restore(ipl); |
102 | interrupts_restore(ipl); |
103 | } |
103 | } |
104 | 104 | ||
105 | /** Initialize ns16550. |
105 | /** Initialize ns16550. |
106 | * |
106 | * |
107 | * @param devno Device number. |
107 | * @param devno Device number. |
108 | * @param port Virtual/IO address of device's registers. |
108 | * @param port Virtual/IO address of device's registers. |
109 | * @param inr Interrupt number. |
109 | * @param inr Interrupt number. |
110 | * @param cir Clear interrupt function. |
110 | * @param cir Clear interrupt function. |
111 | * @param cir_arg First argument to cir. |
111 | * @param cir_arg First argument to cir. |
112 | */ |
112 | */ |
113 | void |
113 | void |
114 | ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg) |
114 | ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg) |
115 | { |
115 | { |
116 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
116 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
117 | stdin = &kbrd; |
117 | stdin = &kbrd; |
118 | 118 | ||
119 | ns16550.devno = devno; |
119 | ns16550.devno = devno; |
120 | ns16550.io_port = port; |
120 | ns16550.io_port = port; |
121 | 121 | ||
122 | irq_initialize(&ns16550_irq); |
122 | irq_initialize(&ns16550_irq); |
123 | ns16550_irq.devno = devno; |
123 | ns16550_irq.devno = devno; |
124 | ns16550_irq.inr = inr; |
124 | ns16550_irq.inr = inr; |
125 | ns16550_irq.claim = ns16550_claim; |
125 | ns16550_irq.claim = ns16550_claim; |
126 | ns16550_irq.handler = ns16550_irq_handler; |
126 | ns16550_irq.handler = ns16550_irq_handler; |
127 | ns16550_irq.cir = cir; |
127 | ns16550_irq.cir = cir; |
128 | ns16550_irq.cir_arg = cir_arg; |
128 | ns16550_irq.cir_arg = cir_arg; |
129 | irq_register(&ns16550_irq); |
129 | irq_register(&ns16550_irq); |
130 | 130 | ||
131 | while ((ns16550_lsr_read(&ns16550) & LSR_DATA_READY)) |
131 | while ((ns16550_lsr_read(&ns16550) & LSR_DATA_READY)) |
132 | ns16550_rbr_read(&ns16550); |
132 | ns16550_rbr_read(&ns16550); |
133 | 133 | ||
134 | sysinfo_set_item_val("kbd", NULL, true); |
134 | sysinfo_set_item_val("kbd", NULL, true); |
135 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
135 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
136 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
136 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
137 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
137 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
138 | sysinfo_set_item_val("kbd.address.virtual", NULL, port); |
138 | sysinfo_set_item_val("kbd.address.virtual", NULL, port); |
139 | sysinfo_set_item_val("kbd.port", NULL, port); |
139 | sysinfo_set_item_val("kbd.port", NULL, port); |
140 | 140 | ||
141 | /* Enable interrupts */ |
141 | /* Enable interrupts */ |
142 | ns16550_ier_write(&ns16550, IER_ERBFI); |
142 | ns16550_ier_write(&ns16550, IER_ERBFI); |
143 | ns16550_mcr_write(&ns16550, MCR_OUT2); |
143 | ns16550_mcr_write(&ns16550, MCR_OUT2); |
144 | 144 | ||
145 | uint8_t c; |
145 | uint8_t c; |
146 | // This switches rbr & ier to mode when accept baudrate constant |
146 | // This switches rbr & ier to mode when accept baudrate constant |
147 | c = ns16550_lcr_read(&ns16550); |
147 | c = ns16550_lcr_read(&ns16550); |
148 | ns16550_lcr_write(&ns16550, 0x80 | c); |
148 | ns16550_lcr_write(&ns16550, 0x80 | c); |
149 | ns16550_rbr_write(&ns16550, 0x0c); |
149 | ns16550_rbr_write(&ns16550, 0x0c); |
150 | ns16550_ier_write(&ns16550, 0x00); |
150 | ns16550_ier_write(&ns16550, 0x00); |
151 | ns16550_lcr_write(&ns16550, c); |
151 | ns16550_lcr_write(&ns16550, c); |
152 | 152 | ||
153 | ns16550_grab(); |
153 | ns16550_grab(); |
154 | } |
154 | } |
155 | 155 | ||
156 | /** Process ns16550 interrupt. */ |
156 | /** Process ns16550 interrupt. */ |
157 | void ns16550_interrupt(void) |
157 | void ns16550_interrupt(void) |
158 | { |
158 | { |
159 | ns16550_poll(); |
159 | ns16550_poll(); |
160 | } |
160 | } |
161 | 161 | ||
162 | /* Called from getc(). */ |
162 | /* Called from getc(). */ |
163 | void ns16550_resume(chardev_t *d) |
163 | void ns16550_resume(chardev_t *d) |
164 | { |
164 | { |
165 | } |
165 | } |
166 | 166 | ||
167 | /* Called from getc(). */ |
167 | /* Called from getc(). */ |
168 | void ns16550_suspend(chardev_t *d) |
168 | void ns16550_suspend(chardev_t *d) |
169 | { |
169 | { |
170 | } |
170 | } |
171 | 171 | ||
172 | 172 | ||
173 | char ns16550_key_read(chardev_t *d) |
173 | char ns16550_key_read(chardev_t *d) |
174 | { |
174 | { |
175 | char ch; |
175 | char ch; |
176 | 176 | ||
177 | while(!(ch = active_read_buff_read())) { |
177 | while(!(ch = active_read_buff_read())) { |
178 | uint8_t x; |
178 | uint8_t x; |
179 | while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY)); |
179 | while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY)); |
180 | 180 | ||
181 | x = ns16550_rbr_read(&ns16550); |
181 | x = ns16550_rbr_read(&ns16550); |
182 | 182 | ||
183 | if (x != IGNORE_CODE) { |
183 | if (x != IGNORE_CODE) { |
184 | if (x & KEY_RELEASE) |
184 | if (x & KEY_RELEASE) |
185 | key_released(x ^ KEY_RELEASE); |
185 | key_released(x ^ KEY_RELEASE); |
186 | else |
186 | else |
187 | active_read_key_pressed(x); |
187 | active_read_key_pressed(x); |
188 | } |
188 | } |
189 | } |
189 | } |
190 | return ch; |
190 | return ch; |
191 | } |
191 | } |
192 | 192 | ||
193 | /** Poll for key press and release events. |
193 | /** Poll for key press and release events. |
194 | * |
194 | * |
195 | * This function can be used to implement keyboard polling. |
195 | * This function can be used to implement keyboard polling. |
196 | */ |
196 | */ |
197 | void ns16550_poll(void) |
197 | void ns16550_poll(void) |
198 | { |
198 | { |
199 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
199 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
200 | uint8_t x; |
200 | uint8_t x; |
201 | 201 | ||
202 | x = ns16550_rbr_read(&ns16550); |
202 | x = ns16550_rbr_read(&ns16550); |
203 | 203 | ||
204 | if (x != IGNORE_CODE) { |
204 | if (x != IGNORE_CODE) { |
205 | if (x & KEY_RELEASE) |
205 | if (x & KEY_RELEASE) |
206 | key_released(x ^ KEY_RELEASE); |
206 | key_released(x ^ KEY_RELEASE); |
207 | else |
207 | else |
208 | key_pressed(x); |
208 | key_pressed(x); |
209 | } |
209 | } |
210 | } |
210 | } |
211 | } |
211 | } |
212 | 212 | ||
213 | irq_ownership_t ns16550_claim(void) |
213 | irq_ownership_t ns16550_claim(void *instance) |
214 | { |
214 | { |
215 | return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY); |
215 | return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY); |
216 | } |
216 | } |
217 | 217 | ||
218 | void ns16550_irq_handler(irq_t *irq, void *arg, ...) |
218 | void ns16550_irq_handler(irq_t *irq) |
219 | { |
219 | { |
220 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
220 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
221 | ipc_irq_send_notif(irq); |
221 | ipc_irq_send_notif(irq); |
222 | else |
222 | else |
223 | ns16550_interrupt(); |
223 | ns16550_interrupt(); |
224 | } |
224 | } |
225 | 225 | ||
226 | /** @} |
226 | /** @} |
227 | */ |
227 | */ |
228 | 228 |