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Merge tag 'trace-v4.14-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted...
[mirror_ubuntu-bionic-kernel.git] / sound / pci / lx6464es / lx_core.c
1 /* -*- linux-c -*- *
2 *
3 * ALSA driver for the digigram lx6464es interface
4 * low-level interface
5 *
6 * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, write to
20 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 *
23 */
24
25 /* #define RMH_DEBUG 1 */
26
27 #include <linux/bitops.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/delay.h>
31
32 #include "lx6464es.h"
33 #include "lx_core.h"
34
35 /* low-level register access */
36
37 static const unsigned long dsp_port_offsets[] = {
38 0,
39 0x400,
40 0x401,
41 0x402,
42 0x403,
43 0x404,
44 0x405,
45 0x406,
46 0x407,
47 0x408,
48 0x409,
49 0x40a,
50 0x40b,
51 0x40c,
52
53 0x410,
54 0x411,
55 0x412,
56 0x413,
57 0x414,
58 0x415,
59 0x416,
60
61 0x420,
62 0x430,
63 0x431,
64 0x432,
65 0x433,
66 0x434,
67 0x440
68 };
69
70 static void __iomem *lx_dsp_register(struct lx6464es *chip, int port)
71 {
72 void __iomem *base_address = chip->port_dsp_bar;
73 return base_address + dsp_port_offsets[port]*4;
74 }
75
76 unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port)
77 {
78 void __iomem *address = lx_dsp_register(chip, port);
79 return ioread32(address);
80 }
81
82 static void lx_dsp_reg_readbuf(struct lx6464es *chip, int port, u32 *data,
83 u32 len)
84 {
85 u32 __iomem *address = lx_dsp_register(chip, port);
86 int i;
87
88 /* we cannot use memcpy_fromio */
89 for (i = 0; i != len; ++i)
90 data[i] = ioread32(address + i);
91 }
92
93
94 void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data)
95 {
96 void __iomem *address = lx_dsp_register(chip, port);
97 iowrite32(data, address);
98 }
99
100 static void lx_dsp_reg_writebuf(struct lx6464es *chip, int port,
101 const u32 *data, u32 len)
102 {
103 u32 __iomem *address = lx_dsp_register(chip, port);
104 int i;
105
106 /* we cannot use memcpy_to */
107 for (i = 0; i != len; ++i)
108 iowrite32(data[i], address + i);
109 }
110
111
112 static const unsigned long plx_port_offsets[] = {
113 0x04,
114 0x40,
115 0x44,
116 0x48,
117 0x4c,
118 0x50,
119 0x54,
120 0x58,
121 0x5c,
122 0x64,
123 0x68,
124 0x6C
125 };
126
127 static void __iomem *lx_plx_register(struct lx6464es *chip, int port)
128 {
129 void __iomem *base_address = chip->port_plx_remapped;
130 return base_address + plx_port_offsets[port];
131 }
132
133 unsigned long lx_plx_reg_read(struct lx6464es *chip, int port)
134 {
135 void __iomem *address = lx_plx_register(chip, port);
136 return ioread32(address);
137 }
138
139 void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data)
140 {
141 void __iomem *address = lx_plx_register(chip, port);
142 iowrite32(data, address);
143 }
144
145 /* rmh */
146
147 #ifdef CONFIG_SND_DEBUG
148 #define CMD_NAME(a) a
149 #else
150 #define CMD_NAME(a) NULL
151 #endif
152
153 #define Reg_CSM_MR 0x00000002
154 #define Reg_CSM_MC 0x00000001
155
156 struct dsp_cmd_info {
157 u32 dcCodeOp; /* Op Code of the command (usually 1st 24-bits
158 * word).*/
159 u16 dcCmdLength; /* Command length in words of 24 bits.*/
160 u16 dcStatusType; /* Status type: 0 for fixed length, 1 for
161 * random. */
162 u16 dcStatusLength; /* Status length (if fixed).*/
163 char *dcOpName;
164 };
165
166 /*
167 Initialization and control data for the Microblaze interface
168 - OpCode:
169 the opcode field of the command set at the proper offset
170 - CmdLength
171 the number of command words
172 - StatusType
173 offset in the status registers: 0 means that the return value may be
174 different from 0, and must be read
175 - StatusLength
176 the number of status words (in addition to the return value)
177 */
178
179 static struct dsp_cmd_info dsp_commands[] =
180 {
181 { (CMD_00_INFO_DEBUG << OPCODE_OFFSET) , 1 /*custom*/
182 , 1 , 0 /**/ , CMD_NAME("INFO_DEBUG") },
183 { (CMD_01_GET_SYS_CFG << OPCODE_OFFSET) , 1 /**/
184 , 1 , 2 /**/ , CMD_NAME("GET_SYS_CFG") },
185 { (CMD_02_SET_GRANULARITY << OPCODE_OFFSET) , 1 /**/
186 , 1 , 0 /**/ , CMD_NAME("SET_GRANULARITY") },
187 { (CMD_03_SET_TIMER_IRQ << OPCODE_OFFSET) , 1 /**/
188 , 1 , 0 /**/ , CMD_NAME("SET_TIMER_IRQ") },
189 { (CMD_04_GET_EVENT << OPCODE_OFFSET) , 1 /**/
190 , 1 , 0 /*up to 10*/ , CMD_NAME("GET_EVENT") },
191 { (CMD_05_GET_PIPES << OPCODE_OFFSET) , 1 /**/
192 , 1 , 2 /*up to 4*/ , CMD_NAME("GET_PIPES") },
193 { (CMD_06_ALLOCATE_PIPE << OPCODE_OFFSET) , 1 /**/
194 , 0 , 0 /**/ , CMD_NAME("ALLOCATE_PIPE") },
195 { (CMD_07_RELEASE_PIPE << OPCODE_OFFSET) , 1 /**/
196 , 0 , 0 /**/ , CMD_NAME("RELEASE_PIPE") },
197 { (CMD_08_ASK_BUFFERS << OPCODE_OFFSET) , 1 /**/
198 , 1 , MAX_STREAM_BUFFER , CMD_NAME("ASK_BUFFERS") },
199 { (CMD_09_STOP_PIPE << OPCODE_OFFSET) , 1 /**/
200 , 0 , 0 /*up to 2*/ , CMD_NAME("STOP_PIPE") },
201 { (CMD_0A_GET_PIPE_SPL_COUNT << OPCODE_OFFSET) , 1 /**/
202 , 1 , 1 /*up to 2*/ , CMD_NAME("GET_PIPE_SPL_COUNT") },
203 { (CMD_0B_TOGGLE_PIPE_STATE << OPCODE_OFFSET) , 1 /*up to 5*/
204 , 1 , 0 /**/ , CMD_NAME("TOGGLE_PIPE_STATE") },
205 { (CMD_0C_DEF_STREAM << OPCODE_OFFSET) , 1 /*up to 4*/
206 , 1 , 0 /**/ , CMD_NAME("DEF_STREAM") },
207 { (CMD_0D_SET_MUTE << OPCODE_OFFSET) , 3 /**/
208 , 1 , 0 /**/ , CMD_NAME("SET_MUTE") },
209 { (CMD_0E_GET_STREAM_SPL_COUNT << OPCODE_OFFSET) , 1/**/
210 , 1 , 2 /**/ , CMD_NAME("GET_STREAM_SPL_COUNT") },
211 { (CMD_0F_UPDATE_BUFFER << OPCODE_OFFSET) , 3 /*up to 4*/
212 , 0 , 1 /**/ , CMD_NAME("UPDATE_BUFFER") },
213 { (CMD_10_GET_BUFFER << OPCODE_OFFSET) , 1 /**/
214 , 1 , 4 /**/ , CMD_NAME("GET_BUFFER") },
215 { (CMD_11_CANCEL_BUFFER << OPCODE_OFFSET) , 1 /**/
216 , 1 , 1 /*up to 4*/ , CMD_NAME("CANCEL_BUFFER") },
217 { (CMD_12_GET_PEAK << OPCODE_OFFSET) , 1 /**/
218 , 1 , 1 /**/ , CMD_NAME("GET_PEAK") },
219 { (CMD_13_SET_STREAM_STATE << OPCODE_OFFSET) , 1 /**/
220 , 1 , 0 /**/ , CMD_NAME("SET_STREAM_STATE") },
221 };
222
223 static void lx_message_init(struct lx_rmh *rmh, enum cmd_mb_opcodes cmd)
224 {
225 snd_BUG_ON(cmd >= CMD_14_INVALID);
226
227 rmh->cmd[0] = dsp_commands[cmd].dcCodeOp;
228 rmh->cmd_len = dsp_commands[cmd].dcCmdLength;
229 rmh->stat_len = dsp_commands[cmd].dcStatusLength;
230 rmh->dsp_stat = dsp_commands[cmd].dcStatusType;
231 rmh->cmd_idx = cmd;
232 memset(&rmh->cmd[1], 0, (REG_CRM_NUMBER - 1) * sizeof(u32));
233
234 #ifdef CONFIG_SND_DEBUG
235 memset(rmh->stat, 0, REG_CRM_NUMBER * sizeof(u32));
236 #endif
237 #ifdef RMH_DEBUG
238 rmh->cmd_idx = cmd;
239 #endif
240 }
241
242 #ifdef RMH_DEBUG
243 #define LXRMH "lx6464es rmh: "
244 static void lx_message_dump(struct lx_rmh *rmh)
245 {
246 u8 idx = rmh->cmd_idx;
247 int i;
248
249 snd_printk(LXRMH "command %s\n", dsp_commands[idx].dcOpName);
250
251 for (i = 0; i != rmh->cmd_len; ++i)
252 snd_printk(LXRMH "\tcmd[%d] %08x\n", i, rmh->cmd[i]);
253
254 for (i = 0; i != rmh->stat_len; ++i)
255 snd_printk(LXRMH "\tstat[%d]: %08x\n", i, rmh->stat[i]);
256 snd_printk("\n");
257 }
258 #else
259 static inline void lx_message_dump(struct lx_rmh *rmh)
260 {}
261 #endif
262
263
264
265 /* sleep 500 - 100 = 400 times 100us -> the timeout is >= 40 ms */
266 #define XILINX_TIMEOUT_MS 40
267 #define XILINX_POLL_NO_SLEEP 100
268 #define XILINX_POLL_ITERATIONS 150
269
270
271 static int lx_message_send_atomic(struct lx6464es *chip, struct lx_rmh *rmh)
272 {
273 u32 reg = ED_DSP_TIMED_OUT;
274 int dwloop;
275
276 if (lx_dsp_reg_read(chip, eReg_CSM) & (Reg_CSM_MC | Reg_CSM_MR)) {
277 dev_err(chip->card->dev, "PIOSendMessage eReg_CSM %x\n", reg);
278 return -EBUSY;
279 }
280
281 /* write command */
282 lx_dsp_reg_writebuf(chip, eReg_CRM1, rmh->cmd, rmh->cmd_len);
283
284 /* MicoBlaze gogogo */
285 lx_dsp_reg_write(chip, eReg_CSM, Reg_CSM_MC);
286
287 /* wait for device to answer */
288 for (dwloop = 0; dwloop != XILINX_TIMEOUT_MS * 1000; ++dwloop) {
289 if (lx_dsp_reg_read(chip, eReg_CSM) & Reg_CSM_MR) {
290 if (rmh->dsp_stat == 0)
291 reg = lx_dsp_reg_read(chip, eReg_CRM1);
292 else
293 reg = 0;
294 goto polling_successful;
295 } else
296 udelay(1);
297 }
298 dev_warn(chip->card->dev, "TIMEOUT lx_message_send_atomic! "
299 "polling failed\n");
300
301 polling_successful:
302 if ((reg & ERROR_VALUE) == 0) {
303 /* read response */
304 if (rmh->stat_len) {
305 snd_BUG_ON(rmh->stat_len >= (REG_CRM_NUMBER-1));
306 lx_dsp_reg_readbuf(chip, eReg_CRM2, rmh->stat,
307 rmh->stat_len);
308 }
309 } else
310 dev_err(chip->card->dev, "rmh error: %08x\n", reg);
311
312 /* clear Reg_CSM_MR */
313 lx_dsp_reg_write(chip, eReg_CSM, 0);
314
315 switch (reg) {
316 case ED_DSP_TIMED_OUT:
317 dev_warn(chip->card->dev, "lx_message_send: dsp timeout\n");
318 return -ETIMEDOUT;
319
320 case ED_DSP_CRASHED:
321 dev_warn(chip->card->dev, "lx_message_send: dsp crashed\n");
322 return -EAGAIN;
323 }
324
325 lx_message_dump(rmh);
326
327 return reg;
328 }
329
330
331 /* low-level dsp access */
332 int lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version)
333 {
334 u16 ret;
335
336 mutex_lock(&chip->msg_lock);
337
338 lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
339 ret = lx_message_send_atomic(chip, &chip->rmh);
340
341 *rdsp_version = chip->rmh.stat[1];
342 mutex_unlock(&chip->msg_lock);
343 return ret;
344 }
345
346 int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq)
347 {
348 u16 ret = 0;
349 u32 freq_raw = 0;
350 u32 freq = 0;
351 u32 frequency = 0;
352
353 mutex_lock(&chip->msg_lock);
354
355 lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
356 ret = lx_message_send_atomic(chip, &chip->rmh);
357
358 if (ret == 0) {
359 freq_raw = chip->rmh.stat[0] >> FREQ_FIELD_OFFSET;
360 freq = freq_raw & XES_FREQ_COUNT8_MASK;
361
362 if ((freq < XES_FREQ_COUNT8_48_MAX) ||
363 (freq > XES_FREQ_COUNT8_44_MIN))
364 frequency = 0; /* unknown */
365 else if (freq >= XES_FREQ_COUNT8_44_MAX)
366 frequency = 44100;
367 else
368 frequency = 48000;
369 }
370
371 mutex_unlock(&chip->msg_lock);
372
373 *rfreq = frequency * chip->freq_ratio;
374
375 return ret;
376 }
377
378 int lx_dsp_get_mac(struct lx6464es *chip)
379 {
380 u32 macmsb, maclsb;
381
382 macmsb = lx_dsp_reg_read(chip, eReg_ADMACESMSB) & 0x00FFFFFF;
383 maclsb = lx_dsp_reg_read(chip, eReg_ADMACESLSB) & 0x00FFFFFF;
384
385 /* todo: endianess handling */
386 chip->mac_address[5] = ((u8 *)(&maclsb))[0];
387 chip->mac_address[4] = ((u8 *)(&maclsb))[1];
388 chip->mac_address[3] = ((u8 *)(&maclsb))[2];
389 chip->mac_address[2] = ((u8 *)(&macmsb))[0];
390 chip->mac_address[1] = ((u8 *)(&macmsb))[1];
391 chip->mac_address[0] = ((u8 *)(&macmsb))[2];
392
393 return 0;
394 }
395
396
397 int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran)
398 {
399 int ret;
400
401 mutex_lock(&chip->msg_lock);
402
403 lx_message_init(&chip->rmh, CMD_02_SET_GRANULARITY);
404 chip->rmh.cmd[0] |= gran;
405
406 ret = lx_message_send_atomic(chip, &chip->rmh);
407 mutex_unlock(&chip->msg_lock);
408 return ret;
409 }
410
411 int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data)
412 {
413 int ret;
414
415 mutex_lock(&chip->msg_lock);
416
417 lx_message_init(&chip->rmh, CMD_04_GET_EVENT);
418 chip->rmh.stat_len = 9; /* we don't necessarily need the full length */
419
420 ret = lx_message_send_atomic(chip, &chip->rmh);
421
422 if (!ret)
423 memcpy(data, chip->rmh.stat, chip->rmh.stat_len * sizeof(u32));
424
425 mutex_unlock(&chip->msg_lock);
426 return ret;
427 }
428
429 #define PIPE_INFO_TO_CMD(capture, pipe) \
430 ((u32)((u32)(pipe) | ((capture) ? ID_IS_CAPTURE : 0L)) << ID_OFFSET)
431
432
433
434 /* low-level pipe handling */
435 int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture,
436 int channels)
437 {
438 int err;
439 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
440
441 mutex_lock(&chip->msg_lock);
442 lx_message_init(&chip->rmh, CMD_06_ALLOCATE_PIPE);
443
444 chip->rmh.cmd[0] |= pipe_cmd;
445 chip->rmh.cmd[0] |= channels;
446
447 err = lx_message_send_atomic(chip, &chip->rmh);
448 mutex_unlock(&chip->msg_lock);
449
450 if (err != 0)
451 dev_err(chip->card->dev, "could not allocate pipe\n");
452
453 return err;
454 }
455
456 int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture)
457 {
458 int err;
459 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
460
461 mutex_lock(&chip->msg_lock);
462 lx_message_init(&chip->rmh, CMD_07_RELEASE_PIPE);
463
464 chip->rmh.cmd[0] |= pipe_cmd;
465
466 err = lx_message_send_atomic(chip, &chip->rmh);
467 mutex_unlock(&chip->msg_lock);
468
469 return err;
470 }
471
472 int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
473 u32 *r_needed, u32 *r_freed, u32 *size_array)
474 {
475 int err;
476 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
477
478 #ifdef CONFIG_SND_DEBUG
479 if (size_array)
480 memset(size_array, 0, sizeof(u32)*MAX_STREAM_BUFFER);
481 #endif
482
483 *r_needed = 0;
484 *r_freed = 0;
485
486 mutex_lock(&chip->msg_lock);
487 lx_message_init(&chip->rmh, CMD_08_ASK_BUFFERS);
488
489 chip->rmh.cmd[0] |= pipe_cmd;
490
491 err = lx_message_send_atomic(chip, &chip->rmh);
492
493 if (!err) {
494 int i;
495 for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
496 u32 stat = chip->rmh.stat[i];
497 if (stat & (BF_EOB << BUFF_FLAGS_OFFSET)) {
498 /* finished */
499 *r_freed += 1;
500 if (size_array)
501 size_array[i] = stat & MASK_DATA_SIZE;
502 } else if ((stat & (BF_VALID << BUFF_FLAGS_OFFSET))
503 == 0)
504 /* free */
505 *r_needed += 1;
506 }
507
508 dev_dbg(chip->card->dev,
509 "CMD_08_ASK_BUFFERS: needed %d, freed %d\n",
510 *r_needed, *r_freed);
511 for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
512 for (i = 0; i != chip->rmh.stat_len; ++i)
513 dev_dbg(chip->card->dev,
514 " stat[%d]: %x, %x\n", i,
515 chip->rmh.stat[i],
516 chip->rmh.stat[i] & MASK_DATA_SIZE);
517 }
518 }
519
520 mutex_unlock(&chip->msg_lock);
521 return err;
522 }
523
524
525 int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture)
526 {
527 int err;
528 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
529
530 mutex_lock(&chip->msg_lock);
531 lx_message_init(&chip->rmh, CMD_09_STOP_PIPE);
532
533 chip->rmh.cmd[0] |= pipe_cmd;
534
535 err = lx_message_send_atomic(chip, &chip->rmh);
536
537 mutex_unlock(&chip->msg_lock);
538 return err;
539 }
540
541 static int lx_pipe_toggle_state(struct lx6464es *chip, u32 pipe, int is_capture)
542 {
543 int err;
544 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
545
546 mutex_lock(&chip->msg_lock);
547 lx_message_init(&chip->rmh, CMD_0B_TOGGLE_PIPE_STATE);
548
549 chip->rmh.cmd[0] |= pipe_cmd;
550
551 err = lx_message_send_atomic(chip, &chip->rmh);
552
553 mutex_unlock(&chip->msg_lock);
554 return err;
555 }
556
557
558 int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture)
559 {
560 int err;
561
562 err = lx_pipe_wait_for_idle(chip, pipe, is_capture);
563 if (err < 0)
564 return err;
565
566 err = lx_pipe_toggle_state(chip, pipe, is_capture);
567
568 return err;
569 }
570
571 int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture)
572 {
573 int err = 0;
574
575 err = lx_pipe_wait_for_start(chip, pipe, is_capture);
576 if (err < 0)
577 return err;
578
579 err = lx_pipe_toggle_state(chip, pipe, is_capture);
580
581 return err;
582 }
583
584
585 int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture,
586 u64 *rsample_count)
587 {
588 int err;
589 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
590
591 mutex_lock(&chip->msg_lock);
592 lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
593
594 chip->rmh.cmd[0] |= pipe_cmd;
595 chip->rmh.stat_len = 2; /* need all words here! */
596
597 err = lx_message_send_atomic(chip, &chip->rmh); /* don't sleep! */
598
599 if (err != 0)
600 dev_err(chip->card->dev,
601 "could not query pipe's sample count\n");
602 else {
603 *rsample_count = ((u64)(chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
604 << 24) /* hi part */
605 + chip->rmh.stat[1]; /* lo part */
606 }
607
608 mutex_unlock(&chip->msg_lock);
609 return err;
610 }
611
612 int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate)
613 {
614 int err;
615 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
616
617 mutex_lock(&chip->msg_lock);
618 lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
619
620 chip->rmh.cmd[0] |= pipe_cmd;
621
622 err = lx_message_send_atomic(chip, &chip->rmh);
623
624 if (err != 0)
625 dev_err(chip->card->dev, "could not query pipe's state\n");
626 else
627 *rstate = (chip->rmh.stat[0] >> PSTATE_OFFSET) & 0x0F;
628
629 mutex_unlock(&chip->msg_lock);
630 return err;
631 }
632
633 static int lx_pipe_wait_for_state(struct lx6464es *chip, u32 pipe,
634 int is_capture, u16 state)
635 {
636 int i;
637
638 /* max 2*PCMOnlyGranularity = 2*1024 at 44100 = < 50 ms:
639 * timeout 50 ms */
640 for (i = 0; i != 50; ++i) {
641 u16 current_state;
642 int err = lx_pipe_state(chip, pipe, is_capture, &current_state);
643
644 if (err < 0)
645 return err;
646
647 if (!err && current_state == state)
648 return 0;
649
650 mdelay(1);
651 }
652
653 return -ETIMEDOUT;
654 }
655
656 int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture)
657 {
658 return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_RUN);
659 }
660
661 int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture)
662 {
663 return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_IDLE);
664 }
665
666 /* low-level stream handling */
667 int lx_stream_set_state(struct lx6464es *chip, u32 pipe,
668 int is_capture, enum stream_state_t state)
669 {
670 int err;
671 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
672
673 mutex_lock(&chip->msg_lock);
674 lx_message_init(&chip->rmh, CMD_13_SET_STREAM_STATE);
675
676 chip->rmh.cmd[0] |= pipe_cmd;
677 chip->rmh.cmd[0] |= state;
678
679 err = lx_message_send_atomic(chip, &chip->rmh);
680 mutex_unlock(&chip->msg_lock);
681
682 return err;
683 }
684
685 int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime,
686 u32 pipe, int is_capture)
687 {
688 int err;
689 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
690 u32 channels = runtime->channels;
691
692 if (runtime->channels != channels)
693 dev_err(chip->card->dev, "channel count mismatch: %d vs %d",
694 runtime->channels, channels);
695
696 mutex_lock(&chip->msg_lock);
697 lx_message_init(&chip->rmh, CMD_0C_DEF_STREAM);
698
699 chip->rmh.cmd[0] |= pipe_cmd;
700
701 if (runtime->sample_bits == 16)
702 /* 16 bit format */
703 chip->rmh.cmd[0] |= (STREAM_FMT_16b << STREAM_FMT_OFFSET);
704
705 if (snd_pcm_format_little_endian(runtime->format))
706 /* little endian/intel format */
707 chip->rmh.cmd[0] |= (STREAM_FMT_intel << STREAM_FMT_OFFSET);
708
709 chip->rmh.cmd[0] |= channels-1;
710
711 err = lx_message_send_atomic(chip, &chip->rmh);
712 mutex_unlock(&chip->msg_lock);
713
714 return err;
715 }
716
717 int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture,
718 int *rstate)
719 {
720 int err;
721 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
722
723 mutex_lock(&chip->msg_lock);
724 lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
725
726 chip->rmh.cmd[0] |= pipe_cmd;
727
728 err = lx_message_send_atomic(chip, &chip->rmh);
729
730 *rstate = (chip->rmh.stat[0] & SF_START) ? START_STATE : PAUSE_STATE;
731
732 mutex_unlock(&chip->msg_lock);
733 return err;
734 }
735
736 int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture,
737 u64 *r_bytepos)
738 {
739 int err;
740 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
741
742 mutex_lock(&chip->msg_lock);
743 lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
744
745 chip->rmh.cmd[0] |= pipe_cmd;
746
747 err = lx_message_send_atomic(chip, &chip->rmh);
748
749 *r_bytepos = ((u64) (chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
750 << 32) /* hi part */
751 + chip->rmh.stat[1]; /* lo part */
752
753 mutex_unlock(&chip->msg_lock);
754 return err;
755 }
756
757 /* low-level buffer handling */
758 int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture,
759 u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi,
760 u32 *r_buffer_index)
761 {
762 int err;
763 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
764
765 mutex_lock(&chip->msg_lock);
766 lx_message_init(&chip->rmh, CMD_0F_UPDATE_BUFFER);
767
768 chip->rmh.cmd[0] |= pipe_cmd;
769 chip->rmh.cmd[0] |= BF_NOTIFY_EOB; /* request interrupt notification */
770
771 /* todo: pause request, circular buffer */
772
773 chip->rmh.cmd[1] = buffer_size & MASK_DATA_SIZE;
774 chip->rmh.cmd[2] = buf_address_lo;
775
776 if (buf_address_hi) {
777 chip->rmh.cmd_len = 4;
778 chip->rmh.cmd[3] = buf_address_hi;
779 chip->rmh.cmd[0] |= BF_64BITS_ADR;
780 }
781
782 err = lx_message_send_atomic(chip, &chip->rmh);
783
784 if (err == 0) {
785 *r_buffer_index = chip->rmh.stat[0];
786 goto done;
787 }
788
789 if (err == EB_RBUFFERS_TABLE_OVERFLOW)
790 dev_err(chip->card->dev,
791 "lx_buffer_give EB_RBUFFERS_TABLE_OVERFLOW\n");
792
793 if (err == EB_INVALID_STREAM)
794 dev_err(chip->card->dev,
795 "lx_buffer_give EB_INVALID_STREAM\n");
796
797 if (err == EB_CMD_REFUSED)
798 dev_err(chip->card->dev,
799 "lx_buffer_give EB_CMD_REFUSED\n");
800
801 done:
802 mutex_unlock(&chip->msg_lock);
803 return err;
804 }
805
806 int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture,
807 u32 *r_buffer_size)
808 {
809 int err;
810 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
811
812 mutex_lock(&chip->msg_lock);
813 lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
814
815 chip->rmh.cmd[0] |= pipe_cmd;
816 chip->rmh.cmd[0] |= MASK_BUFFER_ID; /* ask for the current buffer: the
817 * microblaze will seek for it */
818
819 err = lx_message_send_atomic(chip, &chip->rmh);
820
821 if (err == 0)
822 *r_buffer_size = chip->rmh.stat[0] & MASK_DATA_SIZE;
823
824 mutex_unlock(&chip->msg_lock);
825 return err;
826 }
827
828 int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture,
829 u32 buffer_index)
830 {
831 int err;
832 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
833
834 mutex_lock(&chip->msg_lock);
835 lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
836
837 chip->rmh.cmd[0] |= pipe_cmd;
838 chip->rmh.cmd[0] |= buffer_index;
839
840 err = lx_message_send_atomic(chip, &chip->rmh);
841
842 mutex_unlock(&chip->msg_lock);
843 return err;
844 }
845
846
847 /* low-level gain/peak handling
848 *
849 * \todo: can we unmute capture/playback channels independently?
850 *
851 * */
852 int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute)
853 {
854 int err;
855 /* bit set to 1: channel muted */
856 u64 mute_mask = unmute ? 0 : 0xFFFFFFFFFFFFFFFFLLU;
857
858 mutex_lock(&chip->msg_lock);
859 lx_message_init(&chip->rmh, CMD_0D_SET_MUTE);
860
861 chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, 0);
862
863 chip->rmh.cmd[1] = (u32)(mute_mask >> (u64)32); /* hi part */
864 chip->rmh.cmd[2] = (u32)(mute_mask & (u64)0xFFFFFFFF); /* lo part */
865
866 dev_dbg(chip->card->dev,
867 "mute %x %x %x\n", chip->rmh.cmd[0], chip->rmh.cmd[1],
868 chip->rmh.cmd[2]);
869
870 err = lx_message_send_atomic(chip, &chip->rmh);
871
872 mutex_unlock(&chip->msg_lock);
873 return err;
874 }
875
876 static u32 peak_map[] = {
877 0x00000109, /* -90.308dB */
878 0x0000083B, /* -72.247dB */
879 0x000020C4, /* -60.205dB */
880 0x00008273, /* -48.030dB */
881 0x00020756, /* -36.005dB */
882 0x00040C37, /* -30.001dB */
883 0x00081385, /* -24.002dB */
884 0x00101D3F, /* -18.000dB */
885 0x0016C310, /* -15.000dB */
886 0x002026F2, /* -12.001dB */
887 0x002D6A86, /* -9.000dB */
888 0x004026E6, /* -6.004dB */
889 0x005A9DF6, /* -3.000dB */
890 0x0065AC8B, /* -2.000dB */
891 0x00721481, /* -1.000dB */
892 0x007FFFFF, /* FS */
893 };
894
895 int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels,
896 u32 *r_levels)
897 {
898 int err = 0;
899 int i;
900
901 mutex_lock(&chip->msg_lock);
902 for (i = 0; i < channels; i += 4) {
903 u32 s0, s1, s2, s3;
904
905 lx_message_init(&chip->rmh, CMD_12_GET_PEAK);
906 chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, i);
907
908 err = lx_message_send_atomic(chip, &chip->rmh);
909
910 if (err == 0) {
911 s0 = peak_map[chip->rmh.stat[0] & 0x0F];
912 s1 = peak_map[(chip->rmh.stat[0] >> 4) & 0xf];
913 s2 = peak_map[(chip->rmh.stat[0] >> 8) & 0xf];
914 s3 = peak_map[(chip->rmh.stat[0] >> 12) & 0xf];
915 } else
916 s0 = s1 = s2 = s3 = 0;
917
918 r_levels[0] = s0;
919 r_levels[1] = s1;
920 r_levels[2] = s2;
921 r_levels[3] = s3;
922
923 r_levels += 4;
924 }
925
926 mutex_unlock(&chip->msg_lock);
927 return err;
928 }
929
930 /* interrupt handling */
931 #define PCX_IRQ_NONE 0
932 #define IRQCS_ACTIVE_PCIDB BIT(13)
933 #define IRQCS_ENABLE_PCIIRQ BIT(8)
934 #define IRQCS_ENABLE_PCIDB BIT(9)
935
936 static u32 lx_interrupt_test_ack(struct lx6464es *chip)
937 {
938 u32 irqcs = lx_plx_reg_read(chip, ePLX_IRQCS);
939
940 /* Test if PCI Doorbell interrupt is active */
941 if (irqcs & IRQCS_ACTIVE_PCIDB) {
942 u32 temp;
943 irqcs = PCX_IRQ_NONE;
944
945 while ((temp = lx_plx_reg_read(chip, ePLX_L2PCIDB))) {
946 /* RAZ interrupt */
947 irqcs |= temp;
948 lx_plx_reg_write(chip, ePLX_L2PCIDB, temp);
949 }
950
951 return irqcs;
952 }
953 return PCX_IRQ_NONE;
954 }
955
956 static int lx_interrupt_ack(struct lx6464es *chip, u32 *r_irqsrc,
957 int *r_async_pending, int *r_async_escmd)
958 {
959 u32 irq_async;
960 u32 irqsrc = lx_interrupt_test_ack(chip);
961
962 if (irqsrc == PCX_IRQ_NONE)
963 return 0;
964
965 *r_irqsrc = irqsrc;
966
967 irq_async = irqsrc & MASK_SYS_ASYNC_EVENTS; /* + EtherSound response
968 * (set by xilinx) + EOB */
969
970 if (irq_async & MASK_SYS_STATUS_ESA) {
971 irq_async &= ~MASK_SYS_STATUS_ESA;
972 *r_async_escmd = 1;
973 }
974
975 if (irq_async) {
976 /* dev_dbg(chip->card->dev, "interrupt: async event pending\n"); */
977 *r_async_pending = 1;
978 }
979
980 return 1;
981 }
982
983 static int lx_interrupt_handle_async_events(struct lx6464es *chip, u32 irqsrc,
984 int *r_freq_changed,
985 u64 *r_notified_in_pipe_mask,
986 u64 *r_notified_out_pipe_mask)
987 {
988 int err;
989 u32 stat[9]; /* answer from CMD_04_GET_EVENT */
990
991 /* We can optimize this to not read dumb events.
992 * Answer words are in the following order:
993 * Stat[0] general status
994 * Stat[1] end of buffer OUT pF
995 * Stat[2] end of buffer OUT pf
996 * Stat[3] end of buffer IN pF
997 * Stat[4] end of buffer IN pf
998 * Stat[5] MSB underrun
999 * Stat[6] LSB underrun
1000 * Stat[7] MSB overrun
1001 * Stat[8] LSB overrun
1002 * */
1003
1004 u64 orun_mask;
1005 u64 urun_mask;
1006 int eb_pending_out = (irqsrc & MASK_SYS_STATUS_EOBO) ? 1 : 0;
1007 int eb_pending_in = (irqsrc & MASK_SYS_STATUS_EOBI) ? 1 : 0;
1008
1009 *r_freq_changed = (irqsrc & MASK_SYS_STATUS_FREQ) ? 1 : 0;
1010
1011 err = lx_dsp_read_async_events(chip, stat);
1012 if (err < 0)
1013 return err;
1014
1015 if (eb_pending_in) {
1016 *r_notified_in_pipe_mask = ((u64)stat[3] << 32)
1017 + stat[4];
1018 dev_dbg(chip->card->dev, "interrupt: EOBI pending %llx\n",
1019 *r_notified_in_pipe_mask);
1020 }
1021 if (eb_pending_out) {
1022 *r_notified_out_pipe_mask = ((u64)stat[1] << 32)
1023 + stat[2];
1024 dev_dbg(chip->card->dev, "interrupt: EOBO pending %llx\n",
1025 *r_notified_out_pipe_mask);
1026 }
1027
1028 orun_mask = ((u64)stat[7] << 32) + stat[8];
1029 urun_mask = ((u64)stat[5] << 32) + stat[6];
1030
1031 /* todo: handle xrun notification */
1032
1033 return err;
1034 }
1035
1036 static int lx_interrupt_request_new_buffer(struct lx6464es *chip,
1037 struct lx_stream *lx_stream)
1038 {
1039 struct snd_pcm_substream *substream = lx_stream->stream;
1040 const unsigned int is_capture = lx_stream->is_capture;
1041 int err;
1042
1043 const u32 channels = substream->runtime->channels;
1044 const u32 bytes_per_frame = channels * 3;
1045 const u32 period_size = substream->runtime->period_size;
1046 const u32 period_bytes = period_size * bytes_per_frame;
1047 const u32 pos = lx_stream->frame_pos;
1048 const u32 next_pos = ((pos+1) == substream->runtime->periods) ?
1049 0 : pos + 1;
1050
1051 dma_addr_t buf = substream->dma_buffer.addr + pos * period_bytes;
1052 u32 buf_hi = 0;
1053 u32 buf_lo = 0;
1054 u32 buffer_index = 0;
1055
1056 u32 needed, freed;
1057 u32 size_array[MAX_STREAM_BUFFER];
1058
1059 dev_dbg(chip->card->dev, "->lx_interrupt_request_new_buffer\n");
1060
1061 mutex_lock(&chip->lock);
1062
1063 err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array);
1064 dev_dbg(chip->card->dev,
1065 "interrupt: needed %d, freed %d\n", needed, freed);
1066
1067 unpack_pointer(buf, &buf_lo, &buf_hi);
1068 err = lx_buffer_give(chip, 0, is_capture, period_bytes, buf_lo, buf_hi,
1069 &buffer_index);
1070 dev_dbg(chip->card->dev,
1071 "interrupt: gave buffer index %x on 0x%lx (%d bytes)\n",
1072 buffer_index, (unsigned long)buf, period_bytes);
1073
1074 lx_stream->frame_pos = next_pos;
1075 mutex_unlock(&chip->lock);
1076
1077 return err;
1078 }
1079
1080 irqreturn_t lx_interrupt(int irq, void *dev_id)
1081 {
1082 struct lx6464es *chip = dev_id;
1083 int async_pending, async_escmd;
1084 u32 irqsrc;
1085 bool wake_thread = false;
1086
1087 dev_dbg(chip->card->dev,
1088 "**************************************************\n");
1089
1090 if (!lx_interrupt_ack(chip, &irqsrc, &async_pending, &async_escmd)) {
1091 dev_dbg(chip->card->dev, "IRQ_NONE\n");
1092 return IRQ_NONE; /* this device did not cause the interrupt */
1093 }
1094
1095 if (irqsrc & MASK_SYS_STATUS_CMD_DONE)
1096 return IRQ_HANDLED;
1097
1098 if (irqsrc & MASK_SYS_STATUS_EOBI)
1099 dev_dbg(chip->card->dev, "interrupt: EOBI\n");
1100
1101 if (irqsrc & MASK_SYS_STATUS_EOBO)
1102 dev_dbg(chip->card->dev, "interrupt: EOBO\n");
1103
1104 if (irqsrc & MASK_SYS_STATUS_URUN)
1105 dev_dbg(chip->card->dev, "interrupt: URUN\n");
1106
1107 if (irqsrc & MASK_SYS_STATUS_ORUN)
1108 dev_dbg(chip->card->dev, "interrupt: ORUN\n");
1109
1110 if (async_pending) {
1111 wake_thread = true;
1112 chip->irqsrc = irqsrc;
1113 }
1114
1115 if (async_escmd) {
1116 /* backdoor for ethersound commands
1117 *
1118 * for now, we do not need this
1119 *
1120 * */
1121
1122 dev_dbg(chip->card->dev, "interrupt requests escmd handling\n");
1123 }
1124
1125 return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED;
1126 }
1127
1128 irqreturn_t lx_threaded_irq(int irq, void *dev_id)
1129 {
1130 struct lx6464es *chip = dev_id;
1131 u64 notified_in_pipe_mask = 0;
1132 u64 notified_out_pipe_mask = 0;
1133 int freq_changed;
1134 int err;
1135
1136 /* handle async events */
1137 err = lx_interrupt_handle_async_events(chip, chip->irqsrc,
1138 &freq_changed,
1139 &notified_in_pipe_mask,
1140 &notified_out_pipe_mask);
1141 if (err)
1142 dev_err(chip->card->dev, "error handling async events\n");
1143
1144 if (notified_in_pipe_mask) {
1145 struct lx_stream *lx_stream = &chip->capture_stream;
1146
1147 dev_dbg(chip->card->dev,
1148 "requesting audio transfer for capture\n");
1149 err = lx_interrupt_request_new_buffer(chip, lx_stream);
1150 if (err < 0)
1151 dev_err(chip->card->dev,
1152 "cannot request new buffer for capture\n");
1153 snd_pcm_period_elapsed(lx_stream->stream);
1154 }
1155
1156 if (notified_out_pipe_mask) {
1157 struct lx_stream *lx_stream = &chip->playback_stream;
1158
1159 dev_dbg(chip->card->dev,
1160 "requesting audio transfer for playback\n");
1161 err = lx_interrupt_request_new_buffer(chip, lx_stream);
1162 if (err < 0)
1163 dev_err(chip->card->dev,
1164 "cannot request new buffer for playback\n");
1165 snd_pcm_period_elapsed(lx_stream->stream);
1166 }
1167
1168 return IRQ_HANDLED;
1169 }
1170
1171
1172 static void lx_irq_set(struct lx6464es *chip, int enable)
1173 {
1174 u32 reg = lx_plx_reg_read(chip, ePLX_IRQCS);
1175
1176 /* enable/disable interrupts
1177 *
1178 * Set the Doorbell and PCI interrupt enable bits
1179 *
1180 * */
1181 if (enable)
1182 reg |= (IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
1183 else
1184 reg &= ~(IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
1185 lx_plx_reg_write(chip, ePLX_IRQCS, reg);
1186 }
1187
1188 void lx_irq_enable(struct lx6464es *chip)
1189 {
1190 dev_dbg(chip->card->dev, "->lx_irq_enable\n");
1191 lx_irq_set(chip, 1);
1192 }
1193
1194 void lx_irq_disable(struct lx6464es *chip)
1195 {
1196 dev_dbg(chip->card->dev, "->lx_irq_disable\n");
1197 lx_irq_set(chip, 0);
1198 }
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