source: mainline/uspace/drv/bus/adb/cuda_adb/cuda_adb.c@ 3e242d2

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 3e242d2 was 3be9d10, checked in by Jakub Jermar <jakub@…>, 7 years ago

Get rid of ipc_callid_t
  • Property mode set to 100644
File size: 11.5 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 <assert.h>
40#include <ddf/driver.h>
41#include <ddf/log.h>
42#include <ddi.h>
43#include <errno.h>
44#include <ipc/adb.h>
45#include <libarch/ddi.h>
46#include <stdbool.h>
47#include <stddef.h>
48#include <stdint.h>
49#include <stdio.h>
50#include <stdlib.h>
51
52#include "cuda_adb.h"
53#include "cuda_hw.h"
54
55#define NAME "cuda_adb"
56
57static void cuda_dev_connection(cap_call_handle_t, ipc_call_t *, void *);
58static errno_t cuda_init(cuda_t *);
59static void cuda_irq_handler(ipc_call_t *, void *);
60
61static void cuda_irq_listen(cuda_t *);
62static void cuda_irq_receive(cuda_t *);
63static void cuda_irq_rcv_end(cuda_t *, void *, size_t *);
64static void cuda_irq_send_start(cuda_t *);
65static void cuda_irq_send(cuda_t *);
66
67static void cuda_packet_handle(cuda_t *, uint8_t *, size_t);
68static void cuda_send_start(cuda_t *);
69static void cuda_autopoll_set(cuda_t *, bool);
70
71static void adb_packet_handle(cuda_t *, uint8_t *, size_t, bool);
72
73static irq_pio_range_t cuda_ranges[] = {
74 {
75 .base = 0,
76 .size = sizeof(cuda_regs_t)
77 }
78};
79
80static irq_cmd_t cuda_cmds[] = {
81 {
82 .cmd = CMD_PIO_READ_8,
83 .addr = NULL,
84 .dstarg = 1
85 },
86 {
87 .cmd = CMD_AND,
88 .value = SR_INT,
89 .srcarg = 1,
90 .dstarg = 2
91 },
92 {
93 .cmd = CMD_PREDICATE,
94 .value = 1,
95 .srcarg = 2
96 },
97 {
98 .cmd = CMD_ACCEPT
99 }
100};
101
102
103static irq_code_t cuda_irq_code = {
104 sizeof(cuda_ranges) / sizeof(irq_pio_range_t),
105 cuda_ranges,
106 sizeof(cuda_cmds) / sizeof(irq_cmd_t),
107 cuda_cmds
108};
109
110static errno_t cuda_dev_create(cuda_t *cuda, const char *name, const char *id,
111 adb_dev_t **rdev)
112{
113 adb_dev_t *dev = NULL;
114 ddf_fun_t *fun;
115 errno_t rc;
116
117 fun = ddf_fun_create(cuda->dev, fun_inner, name);
118 if (fun == NULL) {
119 ddf_msg(LVL_ERROR, "Failed creating function '%s'.", name);
120 rc = ENOMEM;
121 goto error;
122 }
123
124 rc = ddf_fun_add_match_id(fun, id, 10);
125 if (rc != EOK) {
126 ddf_msg(LVL_ERROR, "Failed adding match ID.");
127 rc = ENOMEM;
128 goto error;
129 }
130
131 dev = ddf_fun_data_alloc(fun, sizeof(adb_dev_t));
132 if (dev == NULL) {
133 ddf_msg(LVL_ERROR, "Failed allocating memory for '%s'.", name);
134 rc = ENOMEM;
135 goto error;
136 }
137
138 dev->fun = fun;
139 list_append(&dev->lcuda, &cuda->devs);
140
141 ddf_fun_set_conn_handler(fun, cuda_dev_connection);
142
143 rc = ddf_fun_bind(fun);
144 if (rc != EOK) {
145 ddf_msg(LVL_ERROR, "Failed binding function '%s'.", name);
146 goto error;
147 }
148
149 *rdev = dev;
150 return EOK;
151error:
152 if (fun != NULL)
153 ddf_fun_destroy(fun);
154 return rc;
155}
156
157errno_t cuda_add(cuda_t *cuda, cuda_res_t *res)
158{
159 adb_dev_t *kbd = NULL;
160 adb_dev_t *mouse = NULL;
161 errno_t rc;
162
163 cuda->phys_base = res->base;
164
165 rc = cuda_dev_create(cuda, "kbd", "adb/keyboard", &kbd);
166 if (rc != EOK)
167 goto error;
168
169 rc = cuda_dev_create(cuda, "mouse", "adb/mouse", &mouse);
170 if (rc != EOK)
171 goto error;
172
173 cuda->addr_dev[2] = kbd;
174 cuda->addr_dev[8] = kbd;
175
176 cuda->addr_dev[9] = mouse;
177
178 rc = cuda_init(cuda);
179 if (rc != EOK) {
180 ddf_msg(LVL_ERROR, "Failed initializing CUDA hardware.");
181 return rc;
182 }
183
184 return EOK;
185error:
186 return rc;
187}
188
189errno_t cuda_remove(cuda_t *cuda)
190{
191 return ENOTSUP;
192}
193
194errno_t cuda_gone(cuda_t *cuda)
195{
196 return ENOTSUP;
197}
198
199/** Device connection handler */
200static void cuda_dev_connection(cap_call_handle_t iid, ipc_call_t *icall, void *arg)
201{
202 adb_dev_t *dev = (adb_dev_t *) ddf_fun_data_get((ddf_fun_t *) arg);
203 cap_call_handle_t callid;
204 ipc_call_t call;
205 sysarg_t method;
206
207 /* Answer the IPC_M_CONNECT_ME_TO call. */
208 async_answer_0(iid, EOK);
209
210 while (true) {
211 callid = async_get_call(&call);
212 method = IPC_GET_IMETHOD(call);
213
214 if (!method) {
215 /* The other side has hung up. */
216 async_answer_0(callid, EOK);
217 return;
218 }
219
220 async_sess_t *sess =
221 async_callback_receive_start(EXCHANGE_SERIALIZE, &call);
222 if (sess != NULL) {
223 dev->client_sess = sess;
224 async_answer_0(callid, EOK);
225 } else {
226 async_answer_0(callid, EINVAL);
227 }
228 }
229}
230
231static errno_t cuda_init(cuda_t *cuda)
232{
233 errno_t rc;
234
235 void *vaddr;
236 rc = pio_enable((void *) cuda->phys_base, sizeof(cuda_regs_t),
237 &vaddr);
238 if (rc != EOK)
239 return rc;
240
241 cuda->regs = vaddr;
242 cuda->xstate = cx_listen;
243 cuda->bidx = 0;
244 cuda->snd_bytes = 0;
245
246 fibril_mutex_initialize(&cuda->dev_lock);
247
248 /* Disable all interrupts from CUDA. */
249 pio_write_8(&cuda->regs->ier, IER_CLR | ALL_INT);
250
251 cuda_irq_code.ranges[0].base = (uintptr_t) cuda->phys_base;
252 cuda_irq_code.cmds[0].addr = (void *) &((cuda_regs_t *)
253 cuda->phys_base)->ifr;
254 async_irq_subscribe(10, cuda_irq_handler, cuda, &cuda_irq_code, NULL);
255
256 /* Enable SR interrupt. */
257 pio_write_8(&cuda->regs->ier, TIP | TREQ);
258 pio_write_8(&cuda->regs->ier, IER_SET | SR_INT);
259
260 /* Enable ADB autopolling. */
261 cuda_autopoll_set(cuda, true);
262
263 return EOK;
264}
265
266static void cuda_irq_handler(ipc_call_t *call, void *arg)
267{
268 uint8_t rbuf[CUDA_RCV_BUF_SIZE];
269 cuda_t *cuda = (cuda_t *)arg;
270 size_t len;
271 bool handle;
272
273 handle = false;
274 len = 0;
275
276 fibril_mutex_lock(&cuda->dev_lock);
277
278 switch (cuda->xstate) {
279 case cx_listen:
280 cuda_irq_listen(cuda);
281 break;
282 case cx_receive:
283 cuda_irq_receive(cuda);
284 break;
285 case cx_rcv_end:
286 cuda_irq_rcv_end(cuda, rbuf, &len);
287 handle = true;
288 break;
289 case cx_send_start:
290 cuda_irq_send_start(cuda);
291 break;
292 case cx_send:
293 cuda_irq_send(cuda);
294 break;
295 }
296
297 /* Lower IFR.SR_INT so that CUDA can generate next int by raising it. */
298 pio_write_8(&cuda->regs->ifr, SR_INT);
299
300 fibril_mutex_unlock(&cuda->dev_lock);
301
302 /* Handle an incoming packet. */
303 if (handle)
304 cuda_packet_handle(cuda, rbuf, len);
305}
306
307/** Interrupt in listen state.
308 *
309 * Start packet reception.
310 *
311 * @param cuda CUDA instance
312 */
313static void cuda_irq_listen(cuda_t *cuda)
314{
315 uint8_t b = pio_read_8(&cuda->regs->b);
316
317 if ((b & TREQ) != 0) {
318 ddf_msg(LVL_WARN, "cuda_irq_listen: no TREQ?!");
319 return;
320 }
321
322 pio_write_8(&cuda->regs->b, b & ~TIP);
323 cuda->xstate = cx_receive;
324}
325
326/** Interrupt in receive state.
327 *
328 * Receive next byte of packet.
329 *
330 * @param cuda CUDA instance
331 */
332static void cuda_irq_receive(cuda_t *cuda)
333{
334 uint8_t data = pio_read_8(&cuda->regs->sr);
335 if (cuda->bidx < CUDA_RCV_BUF_SIZE)
336 cuda->rcv_buf[cuda->bidx++] = data;
337
338 uint8_t b = pio_read_8(&cuda->regs->b);
339
340 if ((b & TREQ) == 0) {
341 pio_write_8(&cuda->regs->b, b ^ TACK);
342 } else {
343 pio_write_8(&cuda->regs->b, b | TACK | TIP);
344 cuda->xstate = cx_rcv_end;
345 }
346}
347
348/** Interrupt in rcv_end state.
349 *
350 * Terminate packet reception. Either go back to listen state or start
351 * receiving another packet if CUDA has one for us.
352 *
353 * @param cuda CUDA instance
354 * @param buf Buffer for storing received packet
355 * @param len Place to store length of received packet
356 */
357static void cuda_irq_rcv_end(cuda_t *cuda, void *buf, size_t *len)
358{
359 uint8_t b = pio_read_8(&cuda->regs->b);
360
361 if ((b & TREQ) == 0) {
362 cuda->xstate = cx_receive;
363 pio_write_8(&cuda->regs->b, b & ~TIP);
364 } else {
365 cuda->xstate = cx_listen;
366 cuda_send_start(cuda);
367 }
368
369 memcpy(buf, cuda->rcv_buf, cuda->bidx);
370 *len = cuda->bidx;
371 cuda->bidx = 0;
372}
373
374/** Interrupt in send_start state.
375 *
376 * Process result of sending first byte (and send second on success).
377 *
378 * @param cuda CUDA instance
379 */
380static void cuda_irq_send_start(cuda_t *cuda)
381{
382 uint8_t b;
383
384 b = pio_read_8(&cuda->regs->b);
385
386 if ((b & TREQ) == 0) {
387 /* Collision */
388 pio_write_8(&cuda->regs->acr, pio_read_8(&cuda->regs->acr) &
389 ~SR_OUT);
390 pio_read_8(&cuda->regs->sr);
391 pio_write_8(&cuda->regs->b, pio_read_8(&cuda->regs->b) |
392 TIP | TACK);
393 cuda->xstate = cx_listen;
394 return;
395 }
396
397 pio_write_8(&cuda->regs->sr, cuda->snd_buf[1]);
398 pio_write_8(&cuda->regs->b, pio_read_8(&cuda->regs->b) ^ TACK);
399 cuda->bidx = 2;
400
401 cuda->xstate = cx_send;
402}
403
404/** Interrupt in send state.
405 *
406 * Send next byte or terminate transmission.
407 *
408 * @param cuda CUDA instance
409 */
410static void cuda_irq_send(cuda_t *cuda)
411{
412 if (cuda->bidx < cuda->snd_bytes) {
413 /* Send next byte. */
414 pio_write_8(&cuda->regs->sr,
415 cuda->snd_buf[cuda->bidx++]);
416 pio_write_8(&cuda->regs->b, pio_read_8(&cuda->regs->b) ^ TACK);
417 return;
418 }
419
420 /* End transfer. */
421 cuda->snd_bytes = 0;
422 cuda->bidx = 0;
423
424 pio_write_8(&cuda->regs->acr, pio_read_8(&cuda->regs->acr) & ~SR_OUT);
425 pio_read_8(&cuda->regs->sr);
426 pio_write_8(&cuda->regs->b, pio_read_8(&cuda->regs->b) | TACK | TIP);
427
428 cuda->xstate = cx_listen;
429 /* TODO: Match reply with request. */
430}
431
432static void cuda_packet_handle(cuda_t *cuda, uint8_t *data, size_t len)
433{
434 if (data[0] != PT_ADB)
435 return;
436 if (len < 2)
437 return;
438
439 adb_packet_handle(cuda, data + 2, len - 2, (data[1] & 0x40) != 0);
440}
441
442static void adb_packet_handle(cuda_t *cuda, uint8_t *data, size_t size,
443 bool autopoll)
444{
445 uint8_t dev_addr;
446 uint8_t reg_no;
447 uint16_t reg_val;
448 adb_dev_t *dev;
449 unsigned i;
450
451 dev_addr = data[0] >> 4;
452 reg_no = data[0] & 0x03;
453
454 if (size != 3) {
455 ddf_msg(LVL_WARN, "Unrecognized packet, size=%zu", size);
456 for (i = 0; i < size; ++i) {
457 ddf_msg(LVL_WARN, " 0x%02x", data[i]);
458 }
459 return;
460 }
461
462 if (reg_no != 0) {
463 ddf_msg(LVL_WARN, "Unrecognized packet, size=%zu", size);
464 for (i = 0; i < size; ++i) {
465 ddf_msg(LVL_WARN, " 0x%02x", data[i]);
466 }
467 return;
468 }
469
470 reg_val = ((uint16_t) data[1] << 8) | (uint16_t) data[2];
471
472 ddf_msg(LVL_DEBUG, "Received ADB packet for device address %d",
473 dev_addr);
474 dev = cuda->addr_dev[dev_addr];
475 if (dev == NULL)
476 return;
477
478 async_exch_t *exch = async_exchange_begin(dev->client_sess);
479 async_msg_1(exch, ADB_REG_NOTIF, reg_val);
480 async_exchange_end(exch);
481}
482
483static void cuda_autopoll_set(cuda_t *cuda, bool enable)
484{
485 cuda->snd_buf[0] = PT_CUDA;
486 cuda->snd_buf[1] = CPT_AUTOPOLL;
487 cuda->snd_buf[2] = enable ? 0x01 : 0x00;
488 cuda->snd_bytes = 3;
489 cuda->bidx = 0;
490
491 cuda_send_start(cuda);
492}
493
494static void cuda_send_start(cuda_t *cuda)
495{
496 assert(cuda->xstate == cx_listen);
497
498 if (cuda->snd_bytes == 0)
499 return;
500
501 /* Check for incoming data. */
502 if ((pio_read_8(&cuda->regs->b) & TREQ) == 0)
503 return;
504
505 pio_write_8(&cuda->regs->acr, pio_read_8(&cuda->regs->acr) | SR_OUT);
506 pio_write_8(&cuda->regs->sr, cuda->snd_buf[0]);
507 pio_write_8(&cuda->regs->b, pio_read_8(&cuda->regs->b) & ~TIP);
508
509 cuda->xstate = cx_send_start;
510}
511
512/** @}
513 */
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