source: mainline/uspace/srv/hw/bus/cuda_adb/cuda_adb.c@ 24abb85d

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 24abb85d was 24abb85d, checked in by Jakub Jermar <jakub@…>, 8 years ago

Remove SYS_DEVICE_ASSIGN_DEVNO
  • Property mode set to 100644
File size: 11.4 KB
Line 
1/*
2 * Copyright (c) 2010 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
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
15 * derived from this software without specific prior written permission.
16 *
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
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup genarch
30 * @{
31 */
32/** @file VIA-CUDA Apple Desktop Bus driver
33 *
34 * Note: We should really do a full bus scan at the beginning and resolve
35 * address conflicts. Also we should consider the handler ID in r3. Instead
36 * we just assume a keyboard at address 2 or 8 and a mouse at address 9.
37 */
38
39#include <stdio.h>
40#include <stdlib.h>
41#include <stddef.h>
42#include <stdint.h>
43#include <stdbool.h>
44#include <ddi.h>
45#include <libarch/ddi.h>
46#include <loc.h>
47#include <sysinfo.h>
48#include <errno.h>
49#include <ipc/adb.h>
50#include <assert.h>
51#include "cuda_adb.h"
52
53#define NAME "cuda_adb"
54
55static void cuda_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg);
56static int cuda_init(void);
57static void cuda_irq_handler(ipc_callid_t iid, ipc_call_t *call, void *arg);
58
59static void cuda_irq_listen(void);
60static void cuda_irq_receive(void);
61static void cuda_irq_rcv_end(void *buf, size_t *len);
62static void cuda_irq_send_start(void);
63static void cuda_irq_send(void);
64
65static void cuda_packet_handle(uint8_t *buf, size_t len);
66static void cuda_send_start(void);
67static void cuda_autopoll_set(bool enable);
68
69static void adb_packet_handle(uint8_t *data, size_t size, bool autopoll);
70
71
72/** B register fields */
73enum {
74 TREQ = 0x08,
75 TACK = 0x10,
76 TIP = 0x20
77};
78
79/** IER register fields */
80enum {
81 IER_CLR = 0x00,
82 IER_SET = 0x80,
83
84 SR_INT = 0x04,
85 ALL_INT = 0x7f
86};
87
88/** ACR register fields */
89enum {
90 SR_OUT = 0x10
91};
92
93/** Packet types */
94enum {
95 PT_ADB = 0x00,
96 PT_CUDA = 0x01
97};
98
99/** CUDA packet types */
100enum {
101 CPT_AUTOPOLL = 0x01
102};
103
104enum {
105 ADB_MAX_ADDR = 16
106};
107
108static irq_pio_range_t cuda_ranges[] = {
109 {
110 .base = 0,
111 .size = sizeof(cuda_t)
112 }
113};
114
115static irq_cmd_t cuda_cmds[] = {
116 {
117 .cmd = CMD_PIO_READ_8,
118 .addr = NULL,
119 .dstarg = 1
120 },
121 {
122 .cmd = CMD_AND,
123 .value = SR_INT,
124 .srcarg = 1,
125 .dstarg = 2
126 },
127 {
128 .cmd = CMD_PREDICATE,
129 .value = 1,
130 .srcarg = 2
131 },
132 {
133 .cmd = CMD_ACCEPT
134 }
135};
136
137
138static irq_code_t cuda_irq_code = {
139 sizeof(cuda_ranges) / sizeof(irq_pio_range_t),
140 cuda_ranges,
141 sizeof(cuda_cmds) / sizeof(irq_cmd_t),
142 cuda_cmds
143};
144
145static cuda_instance_t cinst;
146
147static cuda_instance_t *instance = &cinst;
148static cuda_t *dev;
149
150static adb_dev_t adb_dev[ADB_MAX_ADDR];
151
152int main(int argc, char *argv[])
153{
154 service_id_t service_id;
155 int rc;
156 int i;
157
158 printf(NAME ": VIA-CUDA Apple Desktop Bus driver\n");
159
160 for (i = 0; i < ADB_MAX_ADDR; ++i) {
161 adb_dev[i].client_sess = NULL;
162 adb_dev[i].service_id = 0;
163 }
164
165 async_set_fallback_port_handler(cuda_connection, NULL);
166 rc = loc_server_register(NAME);
167 if (rc < 0) {
168 printf(NAME ": Unable to register server.\n");
169 return rc;
170 }
171
172 rc = loc_service_register("adb/kbd", &service_id);
173 if (rc != EOK) {
174 printf(NAME ": Unable to register service %s.\n", "adb/kdb");
175 return rc;
176 }
177
178 adb_dev[2].service_id = service_id;
179 adb_dev[8].service_id = service_id;
180
181 rc = loc_service_register("adb/mouse", &service_id);
182 if (rc != EOK) {
183 printf(NAME ": Unable to register servise %s.\n", "adb/mouse");
184 return rc;
185 }
186
187 adb_dev[9].service_id = service_id;
188
189 if (cuda_init() < 0) {
190 printf("cuda_init() failed\n");
191 return 1;
192 }
193
194 task_retval(0);
195 async_manager();
196
197 return 0;
198}
199
200/** Character device connection handler */
201static void cuda_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
202{
203 ipc_callid_t callid;
204 ipc_call_t call;
205 sysarg_t method;
206 service_id_t dsid;
207 int dev_addr, i;
208
209 /* Get the device handle. */
210 dsid = IPC_GET_ARG2(*icall);
211
212 /* Determine which disk device is the client connecting to. */
213 dev_addr = -1;
214 for (i = 0; i < ADB_MAX_ADDR; i++) {
215 if (adb_dev[i].service_id == dsid)
216 dev_addr = i;
217 }
218
219 if (dev_addr < 0) {
220 async_answer_0(iid, EINVAL);
221 return;
222 }
223
224 /* Answer the IPC_M_CONNECT_ME_TO call. */
225 async_answer_0(iid, EOK);
226
227 while (true) {
228 callid = async_get_call(&call);
229 method = IPC_GET_IMETHOD(call);
230
231 if (!method) {
232 /* The other side has hung up. */
233 async_answer_0(callid, EOK);
234 return;
235 }
236
237 async_sess_t *sess =
238 async_callback_receive_start(EXCHANGE_SERIALIZE, &call);
239 if (sess != NULL) {
240 if (adb_dev[dev_addr].client_sess == NULL) {
241 adb_dev[dev_addr].client_sess = sess;
242
243 /*
244 * A hack so that we send the data to the session
245 * regardless of which address the device is on.
246 */
247 for (i = 0; i < ADB_MAX_ADDR; ++i) {
248 if (adb_dev[i].service_id == dsid)
249 adb_dev[i].client_sess = sess;
250 }
251
252 async_answer_0(callid, EOK);
253 } else
254 async_answer_0(callid, ELIMIT);
255 } else
256 async_answer_0(callid, EINVAL);
257 }
258}
259
260
261static int cuda_init(void)
262{
263 if (sysinfo_get_value("cuda.address.physical", &(instance->cuda_physical)) != EOK)
264 return -1;
265
266 void *vaddr;
267 if (pio_enable((void *) instance->cuda_physical, sizeof(cuda_t), &vaddr) != 0)
268 return -1;
269
270 dev = vaddr;
271
272 instance->cuda = dev;
273 instance->xstate = cx_listen;
274 instance->bidx = 0;
275 instance->snd_bytes = 0;
276
277 fibril_mutex_initialize(&instance->dev_lock);
278
279 /* Disable all interrupts from CUDA. */
280 pio_write_8(&dev->ier, IER_CLR | ALL_INT);
281
282 cuda_irq_code.ranges[0].base = (uintptr_t) instance->cuda_physical;
283 cuda_irq_code.cmds[0].addr = (void *) &((cuda_t *) instance->cuda_physical)->ifr;
284 async_irq_subscribe(10, cuda_irq_handler, NULL, &cuda_irq_code);
285
286 /* Enable SR interrupt. */
287 pio_write_8(&dev->ier, TIP | TREQ);
288 pio_write_8(&dev->ier, IER_SET | SR_INT);
289
290 /* Enable ADB autopolling. */
291 cuda_autopoll_set(true);
292
293 return 0;
294}
295
296static void cuda_irq_handler(ipc_callid_t iid, ipc_call_t *call, void *arg)
297{
298 uint8_t rbuf[CUDA_RCV_BUF_SIZE];
299 size_t len;
300 bool handle;
301
302 handle = false;
303 len = 0;
304
305 fibril_mutex_lock(&instance->dev_lock);
306
307 switch (instance->xstate) {
308 case cx_listen:
309 cuda_irq_listen();
310 break;
311 case cx_receive:
312 cuda_irq_receive();
313 break;
314 case cx_rcv_end:
315 cuda_irq_rcv_end(rbuf, &len);
316 handle = true;
317 break;
318 case cx_send_start:
319 cuda_irq_send_start();
320 break;
321 case cx_send:
322 cuda_irq_send();
323 break;
324 }
325
326 /* Lower IFR.SR_INT so that CUDA can generate next int by raising it. */
327 pio_write_8(&instance->cuda->ifr, SR_INT);
328
329 fibril_mutex_unlock(&instance->dev_lock);
330
331 /* Handle an incoming packet. */
332 if (handle)
333 cuda_packet_handle(rbuf, len);
334}
335
336/** Interrupt in listen state.
337 *
338 * Start packet reception.
339 */
340static void cuda_irq_listen(void)
341{
342 uint8_t b = pio_read_8(&dev->b);
343
344 if ((b & TREQ) != 0) {
345 printf("cuda_irq_listen: no TREQ?!\n");
346 return;
347 }
348
349 pio_write_8(&dev->b, b & ~TIP);
350 instance->xstate = cx_receive;
351}
352
353/** Interrupt in receive state.
354 *
355 * Receive next byte of packet.
356 */
357static void cuda_irq_receive(void)
358{
359 uint8_t data = pio_read_8(&dev->sr);
360 if (instance->bidx < CUDA_RCV_BUF_SIZE)
361 instance->rcv_buf[instance->bidx++] = data;
362
363 uint8_t b = pio_read_8(&dev->b);
364
365 if ((b & TREQ) == 0) {
366 pio_write_8(&dev->b, b ^ TACK);
367 } else {
368 pio_write_8(&dev->b, b | TACK | TIP);
369 instance->xstate = cx_rcv_end;
370 }
371}
372
373/** Interrupt in rcv_end state.
374 *
375 * Terminate packet reception. Either go back to listen state or start
376 * receiving another packet if CUDA has one for us.
377 */
378static void cuda_irq_rcv_end(void *buf, size_t *len)
379{
380 uint8_t b = pio_read_8(&dev->b);
381
382 if ((b & TREQ) == 0) {
383 instance->xstate = cx_receive;
384 pio_write_8(&dev->b, b & ~TIP);
385 } else {
386 instance->xstate = cx_listen;
387 cuda_send_start();
388 }
389
390 memcpy(buf, instance->rcv_buf, instance->bidx);
391 *len = instance->bidx;
392 instance->bidx = 0;
393}
394
395/** Interrupt in send_start state.
396 *
397 * Process result of sending first byte (and send second on success).
398 */
399static void cuda_irq_send_start(void)
400{
401 uint8_t b;
402
403 b = pio_read_8(&dev->b);
404
405 if ((b & TREQ) == 0) {
406 /* Collision */
407 pio_write_8(&dev->acr, pio_read_8(&dev->acr) & ~SR_OUT);
408 pio_read_8(&dev->sr);
409 pio_write_8(&dev->b, pio_read_8(&dev->b) | TIP | TACK);
410 instance->xstate = cx_listen;
411 return;
412 }
413
414 pio_write_8(&dev->sr, instance->snd_buf[1]);
415 pio_write_8(&dev->b, pio_read_8(&dev->b) ^ TACK);
416 instance->bidx = 2;
417
418 instance->xstate = cx_send;
419}
420
421/** Interrupt in send state.
422 *
423 * Send next byte or terminate transmission.
424 */
425static void cuda_irq_send(void)
426{
427 if (instance->bidx < instance->snd_bytes) {
428 /* Send next byte. */
429 pio_write_8(&dev->sr, instance->snd_buf[instance->bidx++]);
430 pio_write_8(&dev->b, pio_read_8(&dev->b) ^ TACK);
431 return;
432 }
433
434 /* End transfer. */
435 instance->snd_bytes = 0;
436 instance->bidx = 0;
437
438 pio_write_8(&dev->acr, pio_read_8(&dev->acr) & ~SR_OUT);
439 pio_read_8(&dev->sr);
440 pio_write_8(&dev->b, pio_read_8(&dev->b) | TACK | TIP);
441
442 instance->xstate = cx_listen;
443 /* TODO: Match reply with request. */
444}
445
446static void cuda_packet_handle(uint8_t *data, size_t len)
447{
448 if (data[0] != PT_ADB)
449 return;
450 if (len < 2)
451 return;
452
453 adb_packet_handle(data + 2, len - 2, (data[1] & 0x40) != 0);
454}
455
456static void adb_packet_handle(uint8_t *data, size_t size, bool autopoll)
457{
458 uint8_t dev_addr;
459 uint8_t reg_no;
460 uint16_t reg_val;
461 unsigned i;
462
463 dev_addr = data[0] >> 4;
464 reg_no = data[0] & 0x03;
465
466 if (size != 3) {
467 printf("unrecognized packet, size=%d\n", size);
468 for (i = 0; i < size; ++i) {
469 printf(" 0x%02x", data[i]);
470 }
471 putchar('\n');
472 return;
473 }
474
475 if (reg_no != 0) {
476 printf("unrecognized packet, size=%d\n", size);
477 for (i = 0; i < size; ++i) {
478 printf(" 0x%02x", data[i]);
479 }
480 putchar('\n');
481 return;
482 }
483
484 reg_val = ((uint16_t) data[1] << 8) | (uint16_t) data[2];
485
486 if (adb_dev[dev_addr].client_sess == NULL)
487 return;
488
489 async_exch_t *exch =
490 async_exchange_begin(adb_dev[dev_addr].client_sess);
491 async_msg_1(exch, ADB_REG_NOTIF, reg_val);
492 async_exchange_end(exch);
493}
494
495static void cuda_autopoll_set(bool enable)
496{
497 instance->snd_buf[0] = PT_CUDA;
498 instance->snd_buf[1] = CPT_AUTOPOLL;
499 instance->snd_buf[2] = enable ? 0x01 : 0x00;
500 instance->snd_bytes = 3;
501 instance->bidx = 0;
502
503 cuda_send_start();
504}
505
506static void cuda_send_start(void)
507{
508 cuda_t *dev = instance->cuda;
509
510 assert(instance->xstate == cx_listen);
511
512 if (instance->snd_bytes == 0)
513 return;
514
515 /* Check for incoming data. */
516 if ((pio_read_8(&dev->b) & TREQ) == 0)
517 return;
518
519 pio_write_8(&dev->acr, pio_read_8(&dev->acr) | SR_OUT);
520 pio_write_8(&dev->sr, instance->snd_buf[0]);
521 pio_write_8(&dev->b, pio_read_8(&dev->b) & ~TIP);
522
523 instance->xstate = cx_send_start;
524}
525
526/** @}
527 */
Note: See TracBrowser for help on using the repository browser.