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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 | #ifndef ia64 |
41 | #ifndef ia64 |
42 | #include <arch/drivers/kbd.h> |
42 | #include <arch/drivers/kbd.h> |
43 | #include <arch/drivers/ns16550.h> |
43 | #include <arch/drivers/ns16550.h> |
44 | #endif |
44 | #endif |
45 | #include <ddi/irq.h> |
45 | #include <ddi/irq.h> |
46 | #include <ipc/irq.h> |
46 | #include <ipc/irq.h> |
47 | #include <cpu.h> |
47 | #include <cpu.h> |
48 | #include <arch/asm.h> |
48 | #include <arch/asm.h> |
49 | #include <arch.h> |
49 | #include <arch.h> |
50 | #include <console/chardev.h> |
50 | #include <console/chardev.h> |
51 | #include <console/console.h> |
51 | #include <console/console.h> |
52 | #include <interrupt.h> |
52 | #include <interrupt.h> |
53 | #include <arch/interrupt.h> |
53 | #include <arch/interrupt.h> |
54 | #include <sysinfo/sysinfo.h> |
54 | #include <sysinfo/sysinfo.h> |
55 | #include <synch/spinlock.h> |
55 | #include <synch/spinlock.h> |
56 | 56 | ||
57 | #define LSR_DATA_READY 0x01 |
57 | #define LSR_DATA_READY 0x01 |
58 | 58 | ||
59 | /** Structure representing the ns16550. */ |
59 | /** Structure representing the ns16550. */ |
60 | static ns16550_t ns16550; |
60 | static ns16550_t ns16550; |
61 | 61 | ||
62 | /** Structure for ns16550's IRQ. */ |
62 | /** Structure for ns16550's IRQ. */ |
63 | static irq_t ns16550_irq; |
63 | static irq_t ns16550_irq; |
64 | 64 | ||
65 | /* |
65 | /* |
66 | * These codes read from ns16550 data register are silently ignored. |
66 | * These codes read from ns16550 data register are silently ignored. |
67 | */ |
67 | */ |
68 | #define IGNORE_CODE 0x7f /* all keys up */ |
68 | #define IGNORE_CODE 0x7f /* all keys up */ |
69 | 69 | ||
70 | static void ns16550_suspend(chardev_t *); |
70 | static void ns16550_suspend(chardev_t *); |
71 | static void ns16550_resume(chardev_t *); |
71 | static void ns16550_resume(chardev_t *); |
72 | 72 | ||
73 | static chardev_operations_t ops = { |
73 | static chardev_operations_t ops = { |
74 | .suspend = ns16550_suspend, |
74 | .suspend = ns16550_suspend, |
75 | .resume = ns16550_resume, |
75 | .resume = ns16550_resume, |
76 | .read = ns16550_key_read |
76 | .read = ns16550_key_read |
77 | }; |
77 | }; |
78 | 78 | ||
79 | void ns16550_interrupt(void); |
79 | void ns16550_interrupt(void); |
80 | 80 | ||
81 | /** Initialize keyboard and service interrupts using kernel routine */ |
81 | /** Initialize keyboard and service interrupts using kernel routine */ |
82 | void ns16550_grab(void) |
82 | void ns16550_grab(void) |
83 | { |
83 | { |
84 | ipl_t ipl = interrupts_disable(); |
84 | ipl_t ipl = interrupts_disable(); |
85 | 85 | ||
86 | ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */ |
86 | ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */ |
87 | 87 | ||
88 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) |
88 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) |
89 | (void) ns16550_rbr_read(&ns16550); |
89 | (void) ns16550_rbr_read(&ns16550); |
90 | 90 | ||
91 | spinlock_lock(&ns16550_irq.lock); |
91 | spinlock_lock(&ns16550_irq.lock); |
92 | ns16550_irq.notif_cfg.notify = false; |
92 | ns16550_irq.notif_cfg.notify = false; |
93 | spinlock_unlock(&ns16550_irq.lock); |
93 | spinlock_unlock(&ns16550_irq.lock); |
94 | interrupts_restore(ipl); |
94 | interrupts_restore(ipl); |
95 | } |
95 | } |
96 | 96 | ||
97 | /** Resume the former interrupt vector */ |
97 | /** Resume the former interrupt vector */ |
98 | void ns16550_release(void) |
98 | void ns16550_release(void) |
99 | { |
99 | { |
100 | ipl_t ipl = interrupts_disable(); |
100 | ipl_t ipl = interrupts_disable(); |
101 | spinlock_lock(&ns16550_irq.lock); |
101 | spinlock_lock(&ns16550_irq.lock); |
102 | if (ns16550_irq.notif_cfg.answerbox) |
102 | if (ns16550_irq.notif_cfg.answerbox) |
103 | ns16550_irq.notif_cfg.notify = true; |
103 | ns16550_irq.notif_cfg.notify = true; |
104 | spinlock_unlock(&ns16550_irq.lock); |
104 | spinlock_unlock(&ns16550_irq.lock); |
105 | interrupts_restore(ipl); |
105 | interrupts_restore(ipl); |
106 | } |
106 | } |
107 | 107 | ||
108 | /** Initialize ns16550. |
108 | /** Initialize ns16550. |
109 | * |
109 | * |
110 | * @param devno Device number. |
110 | * @param devno Device number. |
- | 111 | * @param port Virtual/IO address of device's registers. |
|
111 | * @param inr Interrupt number. |
112 | * @param inr Interrupt number. |
- | 113 | * @param cir Clear interrupt function. |
|
112 | * @param vaddr Virtual address of device's registers. |
114 | * @param cir_arg First argument to cir. |
113 | */ |
115 | */ |
- | 116 | void |
|
114 | void ns16550_init(devno_t devno, inr_t inr, ioport_t port) |
117 | ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg) |
115 | { |
118 | { |
116 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
119 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
117 | stdin = &kbrd; |
120 | stdin = &kbrd; |
118 | 121 | ||
119 | ns16550.devno = devno; |
122 | ns16550.devno = devno; |
120 | ns16550.io_port = port; |
123 | ns16550.io_port = port; |
121 | 124 | ||
122 | irq_initialize(&ns16550_irq); |
125 | irq_initialize(&ns16550_irq); |
123 | ns16550_irq.devno = devno; |
126 | ns16550_irq.devno = devno; |
124 | ns16550_irq.inr = inr; |
127 | ns16550_irq.inr = inr; |
125 | ns16550_irq.claim = ns16550_claim; |
128 | ns16550_irq.claim = ns16550_claim; |
126 | ns16550_irq.handler = ns16550_irq_handler; |
129 | ns16550_irq.handler = ns16550_irq_handler; |
- | 130 | ns16550_irq.cir = cir; |
|
- | 131 | ns16550_irq.cir_arg = cir_arg; |
|
127 | irq_register(&ns16550_irq); |
132 | irq_register(&ns16550_irq); |
128 | 133 | ||
129 | sysinfo_set_item_val("kbd", NULL, true); |
134 | sysinfo_set_item_val("kbd", NULL, true); |
130 | #ifndef ia64 |
135 | #ifndef ia64 |
131 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
136 | sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550); |
132 | #endif |
137 | #endif |
133 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
138 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
134 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
139 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
135 | sysinfo_set_item_val("kbd.address.virtual", NULL, port); |
140 | sysinfo_set_item_val("kbd.address.virtual", NULL, port); |
136 | 141 | ||
137 | #ifdef CONFIG_NS16550_INTERRUPT_DRIVEN |
142 | #ifdef CONFIG_NS16550_INTERRUPT_DRIVEN |
138 | /* Enable interrupts */ |
143 | /* Enable interrupts */ |
139 | ns16550_ier_write(&ns16550, IER_ERBFI); |
144 | ns16550_ier_write(&ns16550, IER_ERBFI); |
140 | ns16550_mcr_write(&ns16550, MCR_OUT2); |
145 | ns16550_mcr_write(&ns16550, MCR_OUT2); |
141 | #endif |
146 | #endif |
142 | 147 | ||
143 | #ifdef ia64 |
148 | #ifdef ia64 |
144 | uint8_t c; |
149 | uint8_t c; |
145 | c = ns16550_lcr_read(&ns16550); |
150 | c = ns16550_lcr_read(&ns16550); |
146 | ns16550_lcr_write(&ns16550, 0x80 | c); |
151 | ns16550_lcr_write(&ns16550, 0x80 | c); |
147 | ns16550_rbr_write(&ns16550, 0x0c); |
152 | ns16550_rbr_write(&ns16550, 0x0c); |
148 | ns16550_ier_write(&ns16550, 0x00); |
153 | ns16550_ier_write(&ns16550, 0x00); |
149 | ns16550_lcr_write(&ns16550, c); |
154 | ns16550_lcr_write(&ns16550, c); |
150 | #endif |
155 | #endif |
151 | 156 | ||
152 | ns16550_grab(); |
157 | ns16550_grab(); |
153 | } |
158 | } |
154 | 159 | ||
155 | /** Process ns16550 interrupt. */ |
160 | /** Process ns16550 interrupt. */ |
156 | void ns16550_interrupt(void) |
161 | void ns16550_interrupt(void) |
157 | { |
162 | { |
158 | ns16550_poll(); |
163 | ns16550_poll(); |
159 | } |
164 | } |
160 | 165 | ||
161 | /* Called from getc(). */ |
166 | /* Called from getc(). */ |
162 | void ns16550_resume(chardev_t *d) |
167 | void ns16550_resume(chardev_t *d) |
163 | { |
168 | { |
164 | } |
169 | } |
165 | 170 | ||
166 | /* Called from getc(). */ |
171 | /* Called from getc(). */ |
167 | void ns16550_suspend(chardev_t *d) |
172 | void ns16550_suspend(chardev_t *d) |
168 | { |
173 | { |
169 | } |
174 | } |
170 | 175 | ||
171 | 176 | ||
172 | char ns16550_key_read(chardev_t *d) |
177 | char ns16550_key_read(chardev_t *d) |
173 | { |
178 | { |
174 | char ch; |
179 | char ch; |
175 | 180 | ||
176 | while(!(ch = active_read_buff_read())) { |
181 | while(!(ch = active_read_buff_read())) { |
177 | uint8_t x; |
182 | uint8_t x; |
178 | while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY)) |
183 | while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY)) |
179 | ; |
184 | ; |
180 | x = ns16550_rbr_read(&ns16550); |
185 | x = ns16550_rbr_read(&ns16550); |
181 | #ifndef ia64 |
186 | #ifndef ia64 |
182 | if (x != IGNORE_CODE) { |
187 | if (x != IGNORE_CODE) { |
183 | if (x & KEY_RELEASE) |
188 | if (x & KEY_RELEASE) |
184 | key_released(x ^ KEY_RELEASE); |
189 | key_released(x ^ KEY_RELEASE); |
185 | else |
190 | else |
186 | active_read_key_pressed(x); |
191 | active_read_key_pressed(x); |
187 | } |
192 | } |
188 | #else |
193 | #else |
189 | extern chardev_t kbrd; |
194 | extern chardev_t kbrd; |
190 | if(x != 0x0d) { |
195 | if(x != 0x0d) { |
191 | if(x == 0x7f) |
196 | if(x == 0x7f) |
192 | x = '\b'; |
197 | x = '\b'; |
193 | chardev_push_character(&kbrd, x); |
198 | chardev_push_character(&kbrd, x); |
194 | } |
199 | } |
195 | #endif |
200 | #endif |
196 | 201 | ||
197 | } |
202 | } |
198 | return ch; |
203 | return ch; |
199 | } |
204 | } |
200 | 205 | ||
201 | /** Poll for key press and release events. |
206 | /** Poll for key press and release events. |
202 | * |
207 | * |
203 | * This function can be used to implement keyboard polling. |
208 | * This function can be used to implement keyboard polling. |
204 | */ |
209 | */ |
205 | void ns16550_poll(void) |
210 | void ns16550_poll(void) |
206 | { |
211 | { |
207 | #ifndef CONFIG_NS16550_INTERRUPT_DRIVEN |
212 | #ifndef CONFIG_NS16550_INTERRUPT_DRIVEN |
208 | ipl_t ipl; |
213 | ipl_t ipl; |
209 | 214 | ||
210 | ipl = interrupts_disable(); |
215 | ipl = interrupts_disable(); |
211 | spinlock_lock(&ns16550_irq.lock); |
216 | spinlock_lock(&ns16550_irq.lock); |
212 | 217 | ||
213 | if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
218 | if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
214 | if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) { |
219 | if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) { |
215 | /* |
220 | /* |
216 | * Send IPC notification. |
221 | * Send IPC notification. |
217 | */ |
222 | */ |
218 | ipc_irq_send_notif(&ns16550_irq); |
223 | ipc_irq_send_notif(&ns16550_irq); |
219 | spinlock_unlock(&ns16550_irq.lock); |
224 | spinlock_unlock(&ns16550_irq.lock); |
220 | interrupts_restore(ipl); |
225 | interrupts_restore(ipl); |
221 | return; |
226 | return; |
222 | } |
227 | } |
223 | } |
228 | } |
224 | 229 | ||
225 | spinlock_unlock(&ns16550_irq.lock); |
230 | spinlock_unlock(&ns16550_irq.lock); |
226 | interrupts_restore(ipl); |
231 | interrupts_restore(ipl); |
227 | #endif |
232 | #endif |
228 | 233 | ||
229 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
234 | while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
230 | uint8_t x; |
235 | uint8_t x; |
231 | 236 | ||
232 | x = ns16550_rbr_read(&ns16550); |
237 | x = ns16550_rbr_read(&ns16550); |
233 | #ifndef ia64 |
238 | #ifndef ia64 |
234 | if (x != IGNORE_CODE) { |
239 | if (x != IGNORE_CODE) { |
235 | if (x & KEY_RELEASE) |
240 | if (x & KEY_RELEASE) |
236 | key_released(x ^ KEY_RELEASE); |
241 | key_released(x ^ KEY_RELEASE); |
237 | else |
242 | else |
238 | key_pressed(x); |
243 | key_pressed(x); |
239 | } |
244 | } |
240 | #else |
245 | #else |
241 | extern chardev_t kbrd; |
246 | extern chardev_t kbrd; |
242 | if(x != 0x0d) { |
247 | if(x != 0x0d) { |
243 | if (x == 0x7f) |
248 | if (x == 0x7f) |
244 | x = '\b'; |
249 | x = '\b'; |
245 | chardev_push_character(&kbrd, x); |
250 | chardev_push_character(&kbrd, x); |
246 | } |
251 | } |
247 | #endif |
252 | #endif |
248 | 253 | ||
249 | } |
254 | } |
250 | } |
255 | } |
251 | 256 | ||
252 | irq_ownership_t ns16550_claim(void) |
257 | irq_ownership_t ns16550_claim(void) |
253 | { |
258 | { |
254 | return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY); |
259 | return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY); |
255 | } |
260 | } |
256 | 261 | ||
257 | void ns16550_irq_handler(irq_t *irq, void *arg, ...) |
262 | void ns16550_irq_handler(irq_t *irq, void *arg, ...) |
258 | { |
263 | { |
259 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
264 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
260 | ipc_irq_send_notif(irq); |
265 | ipc_irq_send_notif(irq); |
261 | else |
266 | else |
262 | ns16550_interrupt(); |
267 | ns16550_interrupt(); |
263 | } |
268 | } |
264 | 269 | ||
265 | /** @} |
270 | /** @} |
266 | */ |
271 | */ |
267 | 272 |