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TOMOYO Linux Cross Reference
Linux/sound/pci/echoaudio/echoaudio_dsp.c

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  1 /****************************************************************************
  2 
  3    Copyright Echo Digital Audio Corporation (c) 1998 - 2004
  4    All rights reserved
  5    www.echoaudio.com
  6 
  7    This file is part of Echo Digital Audio's generic driver library.
  8 
  9    Echo Digital Audio's generic driver library is free software;
 10    you can redistribute it and/or modify it under the terms of
 11    the GNU General Public License as published by the Free Software
 12    Foundation.
 13 
 14    This program is distributed in the hope that it will be useful,
 15    but WITHOUT ANY WARRANTY; without even the implied warranty of
 16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17    GNU General Public License for more details.
 18 
 19    You should have received a copy of the GNU General Public License
 20    along with this program; if not, write to the Free Software
 21    Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 22    MA  02111-1307, USA.
 23 
 24    *************************************************************************
 25 
 26  Translation from C++ and adaptation for use in ALSA-Driver
 27  were made by Giuliano Pochini <pochini@shiny.it>
 28 
 29 ****************************************************************************/
 30 
 31 #if PAGE_SIZE < 4096
 32 #error PAGE_SIZE is < 4k
 33 #endif
 34 
 35 static int restore_dsp_rettings(struct echoaudio *chip);
 36 
 37 
 38 /* Some vector commands involve the DSP reading or writing data to and from the
 39 comm page; if you send one of these commands to the DSP, it will complete the
 40 command and then write a non-zero value to the Handshake field in the
 41 comm page.  This function waits for the handshake to show up. */
 42 static int wait_handshake(struct echoaudio *chip)
 43 {
 44         int i;
 45 
 46         /* Wait up to 20ms for the handshake from the DSP */
 47         for (i = 0; i < HANDSHAKE_TIMEOUT; i++) {
 48                 /* Look for the handshake value */
 49                 barrier();
 50                 if (chip->comm_page->handshake) {
 51                         return 0;
 52                 }
 53                 udelay(1);
 54         }
 55 
 56         dev_err(chip->card->dev, "wait_handshake(): Timeout waiting for DSP\n");
 57         return -EBUSY;
 58 }
 59 
 60 
 61 
 62 /* Much of the interaction between the DSP and the driver is done via vector
 63 commands; send_vector writes a vector command to the DSP.  Typically, this
 64 causes the DSP to read or write fields in the comm page.
 65 PCI posting is not required thanks to the handshake logic. */
 66 static int send_vector(struct echoaudio *chip, u32 command)
 67 {
 68         int i;
 69 
 70         wmb();  /* Flush all pending writes before sending the command */
 71 
 72         /* Wait up to 100ms for the "vector busy" bit to be off */
 73         for (i = 0; i < VECTOR_BUSY_TIMEOUT; i++) {
 74                 if (!(get_dsp_register(chip, CHI32_VECTOR_REG) &
 75                       CHI32_VECTOR_BUSY)) {
 76                         set_dsp_register(chip, CHI32_VECTOR_REG, command);
 77                         /*if (i)  DE_ACT(("send_vector time: %d\n", i));*/
 78                         return 0;
 79                 }
 80                 udelay(1);
 81         }
 82 
 83         dev_err(chip->card->dev, "timeout on send_vector\n");
 84         return -EBUSY;
 85 }
 86 
 87 
 88 
 89 /* write_dsp writes a 32-bit value to the DSP; this is used almost
 90 exclusively for loading the DSP. */
 91 static int write_dsp(struct echoaudio *chip, u32 data)
 92 {
 93         u32 status, i;
 94 
 95         for (i = 0; i < 10000000; i++) {        /* timeout = 10s */
 96                 status = get_dsp_register(chip, CHI32_STATUS_REG);
 97                 if ((status & CHI32_STATUS_HOST_WRITE_EMPTY) != 0) {
 98                         set_dsp_register(chip, CHI32_DATA_REG, data);
 99                         wmb();                  /* write it immediately */
100                         return 0;
101                 }
102                 udelay(1);
103                 cond_resched();
104         }
105 
106         chip->bad_board = true;         /* Set true until DSP re-loaded */
107         dev_dbg(chip->card->dev, "write_dsp: Set bad_board to true\n");
108         return -EIO;
109 }
110 
111 
112 
113 /* read_dsp reads a 32-bit value from the DSP; this is used almost
114 exclusively for loading the DSP and checking the status of the ASIC. */
115 static int read_dsp(struct echoaudio *chip, u32 *data)
116 {
117         u32 status, i;
118 
119         for (i = 0; i < READ_DSP_TIMEOUT; i++) {
120                 status = get_dsp_register(chip, CHI32_STATUS_REG);
121                 if ((status & CHI32_STATUS_HOST_READ_FULL) != 0) {
122                         *data = get_dsp_register(chip, CHI32_DATA_REG);
123                         return 0;
124                 }
125                 udelay(1);
126                 cond_resched();
127         }
128 
129         chip->bad_board = true;         /* Set true until DSP re-loaded */
130         dev_err(chip->card->dev, "read_dsp: Set bad_board to true\n");
131         return -EIO;
132 }
133 
134 
135 
136 /****************************************************************************
137         Firmware loading functions
138  ****************************************************************************/
139 
140 /* This function is used to read back the serial number from the DSP;
141 this is triggered by the SET_COMMPAGE_ADDR command.
142 Only some early Echogals products have serial numbers in the ROM;
143 the serial number is not used, but you still need to do this as
144 part of the DSP load process. */
145 static int read_sn(struct echoaudio *chip)
146 {
147         int i;
148         u32 sn[6];
149 
150         for (i = 0; i < 5; i++) {
151                 if (read_dsp(chip, &sn[i])) {
152                         dev_err(chip->card->dev,
153                                 "Failed to read serial number\n");
154                         return -EIO;
155                 }
156         }
157         dev_dbg(chip->card->dev,
158                 "Read serial number %08x %08x %08x %08x %08x\n",
159                  sn[0], sn[1], sn[2], sn[3], sn[4]);
160         return 0;
161 }
162 
163 
164 
165 #ifndef ECHOCARD_HAS_ASIC
166 /* This card has no ASIC, just return ok */
167 static inline int check_asic_status(struct echoaudio *chip)
168 {
169         chip->asic_loaded = true;
170         return 0;
171 }
172 
173 #endif /* !ECHOCARD_HAS_ASIC */
174 
175 
176 
177 #ifdef ECHOCARD_HAS_ASIC
178 
179 /* Load ASIC code - done after the DSP is loaded */
180 static int load_asic_generic(struct echoaudio *chip, u32 cmd, short asic)
181 {
182         const struct firmware *fw;
183         int err;
184         u32 i, size;
185         u8 *code;
186 
187         err = get_firmware(&fw, chip, asic);
188         if (err < 0) {
189                 dev_warn(chip->card->dev, "Firmware not found !\n");
190                 return err;
191         }
192 
193         code = (u8 *)fw->data;
194         size = fw->size;
195 
196         /* Send the "Here comes the ASIC" command */
197         if (write_dsp(chip, cmd) < 0)
198                 goto la_error;
199 
200         /* Write length of ASIC file in bytes */
201         if (write_dsp(chip, size) < 0)
202                 goto la_error;
203 
204         for (i = 0; i < size; i++) {
205                 if (write_dsp(chip, code[i]) < 0)
206                         goto la_error;
207         }
208 
209         free_firmware(fw, chip);
210         return 0;
211 
212 la_error:
213         dev_err(chip->card->dev, "failed on write_dsp\n");
214         free_firmware(fw, chip);
215         return -EIO;
216 }
217 
218 #endif /* ECHOCARD_HAS_ASIC */
219 
220 
221 
222 #ifdef DSP_56361
223 
224 /* Install the resident loader for 56361 DSPs;  The resident loader is on
225 the EPROM on the board for 56301 DSP. The resident loader is a tiny little
226 program that is used to load the real DSP code. */
227 static int install_resident_loader(struct echoaudio *chip)
228 {
229         u32 address;
230         int index, words, i;
231         u16 *code;
232         u32 status;
233         const struct firmware *fw;
234 
235         /* 56361 cards only!  This check is required by the old 56301-based
236         Mona and Gina24 */
237         if (chip->device_id != DEVICE_ID_56361)
238                 return 0;
239 
240         /* Look to see if the resident loader is present.  If the resident
241         loader is already installed, host flag 5 will be on. */
242         status = get_dsp_register(chip, CHI32_STATUS_REG);
243         if (status & CHI32_STATUS_REG_HF5) {
244                 dev_dbg(chip->card->dev,
245                         "Resident loader already installed; status is 0x%x\n",
246                          status);
247                 return 0;
248         }
249 
250         i = get_firmware(&fw, chip, FW_361_LOADER);
251         if (i < 0) {
252                 dev_warn(chip->card->dev, "Firmware not found !\n");
253                 return i;
254         }
255 
256         /* The DSP code is an array of 16 bit words.  The array is divided up
257         into sections.  The first word of each section is the size in words,
258         followed by the section type.
259         Since DSP addresses and data are 24 bits wide, they each take up two
260         16 bit words in the array.
261         This is a lot like the other loader loop, but it's not a loop, you
262         don't write the memory type, and you don't write a zero at the end. */
263 
264         /* Set DSP format bits for 24 bit mode */
265         set_dsp_register(chip, CHI32_CONTROL_REG,
266                          get_dsp_register(chip, CHI32_CONTROL_REG) | 0x900);
267 
268         code = (u16 *)fw->data;
269 
270         /* Skip the header section; the first word in the array is the size
271         of the first section, so the first real section of code is pointed
272         to by Code[0]. */
273         index = code[0];
274 
275         /* Skip the section size, LRS block type, and DSP memory type */
276         index += 3;
277 
278         /* Get the number of DSP words to write */
279         words = code[index++];
280 
281         /* Get the DSP address for this block; 24 bits, so build from two words */
282         address = ((u32)code[index] << 16) + code[index + 1];
283         index += 2;
284 
285         /* Write the count to the DSP */
286         if (write_dsp(chip, words)) {
287                 dev_err(chip->card->dev,
288                         "install_resident_loader: Failed to write word count!\n");
289                 goto irl_error;
290         }
291         /* Write the DSP address */
292         if (write_dsp(chip, address)) {
293                 dev_err(chip->card->dev,
294                         "install_resident_loader: Failed to write DSP address!\n");
295                 goto irl_error;
296         }
297         /* Write out this block of code to the DSP */
298         for (i = 0; i < words; i++) {
299                 u32 data;
300 
301                 data = ((u32)code[index] << 16) + code[index + 1];
302                 if (write_dsp(chip, data)) {
303                         dev_err(chip->card->dev,
304                                 "install_resident_loader: Failed to write DSP code\n");
305                         goto irl_error;
306                 }
307                 index += 2;
308         }
309 
310         /* Wait for flag 5 to come up */
311         for (i = 0; i < 200; i++) {     /* Timeout is 50us * 200 = 10ms */
312                 udelay(50);
313                 status = get_dsp_register(chip, CHI32_STATUS_REG);
314                 if (status & CHI32_STATUS_REG_HF5)
315                         break;
316         }
317 
318         if (i == 200) {
319                 dev_err(chip->card->dev, "Resident loader failed to set HF5\n");
320                 goto irl_error;
321         }
322 
323         dev_dbg(chip->card->dev, "Resident loader successfully installed\n");
324         free_firmware(fw, chip);
325         return 0;
326 
327 irl_error:
328         free_firmware(fw, chip);
329         return -EIO;
330 }
331 
332 #endif /* DSP_56361 */
333 
334 
335 static int load_dsp(struct echoaudio *chip, u16 *code)
336 {
337         u32 address, data;
338         int index, words, i;
339 
340         if (chip->dsp_code == code) {
341                 dev_warn(chip->card->dev, "DSP is already loaded!\n");
342                 return 0;
343         }
344         chip->bad_board = true;         /* Set true until DSP loaded */
345         chip->dsp_code = NULL;          /* Current DSP code not loaded */
346         chip->asic_loaded = false;      /* Loading the DSP code will reset the ASIC */
347 
348         dev_dbg(chip->card->dev, "load_dsp: Set bad_board to true\n");
349 
350         /* If this board requires a resident loader, install it. */
351 #ifdef DSP_56361
352         if ((i = install_resident_loader(chip)) < 0)
353                 return i;
354 #endif
355 
356         /* Send software reset command */
357         if (send_vector(chip, DSP_VC_RESET) < 0) {
358                 dev_err(chip->card->dev,
359                         "LoadDsp: send_vector DSP_VC_RESET failed, Critical Failure\n");
360                 return -EIO;
361         }
362         /* Delay 10us */
363         udelay(10);
364 
365         /* Wait 10ms for HF3 to indicate that software reset is complete */
366         for (i = 0; i < 1000; i++) {    /* Timeout is 10us * 1000 = 10ms */
367                 if (get_dsp_register(chip, CHI32_STATUS_REG) &
368                     CHI32_STATUS_REG_HF3)
369                         break;
370                 udelay(10);
371         }
372 
373         if (i == 1000) {
374                 dev_err(chip->card->dev,
375                         "load_dsp: Timeout waiting for CHI32_STATUS_REG_HF3\n");
376                 return -EIO;
377         }
378 
379         /* Set DSP format bits for 24 bit mode now that soft reset is done */
380         set_dsp_register(chip, CHI32_CONTROL_REG,
381                          get_dsp_register(chip, CHI32_CONTROL_REG) | 0x900);
382 
383         /* Main loader loop */
384 
385         index = code[0];
386         for (;;) {
387                 int block_type, mem_type;
388 
389                 /* Total Block Size */
390                 index++;
391 
392                 /* Block Type */
393                 block_type = code[index];
394                 if (block_type == 4)    /* We're finished */
395                         break;
396 
397                 index++;
398 
399                 /* Memory Type  P=0,X=1,Y=2 */
400                 mem_type = code[index++];
401 
402                 /* Block Code Size */
403                 words = code[index++];
404                 if (words == 0)         /* We're finished */
405                         break;
406 
407                 /* Start Address */
408                 address = ((u32)code[index] << 16) + code[index + 1];
409                 index += 2;
410 
411                 if (write_dsp(chip, words) < 0) {
412                         dev_err(chip->card->dev,
413                                 "load_dsp: failed to write number of DSP words\n");
414                         return -EIO;
415                 }
416                 if (write_dsp(chip, address) < 0) {
417                         dev_err(chip->card->dev,
418                                 "load_dsp: failed to write DSP address\n");
419                         return -EIO;
420                 }
421                 if (write_dsp(chip, mem_type) < 0) {
422                         dev_err(chip->card->dev,
423                                 "load_dsp: failed to write DSP memory type\n");
424                         return -EIO;
425                 }
426                 /* Code */
427                 for (i = 0; i < words; i++, index+=2) {
428                         data = ((u32)code[index] << 16) + code[index + 1];
429                         if (write_dsp(chip, data) < 0) {
430                                 dev_err(chip->card->dev,
431                                         "load_dsp: failed to write DSP data\n");
432                                 return -EIO;
433                         }
434                 }
435         }
436 
437         if (write_dsp(chip, 0) < 0) {   /* We're done!!! */
438                 dev_err(chip->card->dev,
439                         "load_dsp: Failed to write final zero\n");
440                 return -EIO;
441         }
442         udelay(10);
443 
444         for (i = 0; i < 5000; i++) {    /* Timeout is 100us * 5000 = 500ms */
445                 /* Wait for flag 4 - indicates that the DSP loaded OK */
446                 if (get_dsp_register(chip, CHI32_STATUS_REG) &
447                     CHI32_STATUS_REG_HF4) {
448                         set_dsp_register(chip, CHI32_CONTROL_REG,
449                                          get_dsp_register(chip, CHI32_CONTROL_REG) & ~0x1b00);
450 
451                         if (write_dsp(chip, DSP_FNC_SET_COMMPAGE_ADDR) < 0) {
452                                 dev_err(chip->card->dev,
453                                         "load_dsp: Failed to write DSP_FNC_SET_COMMPAGE_ADDR\n");
454                                 return -EIO;
455                         }
456 
457                         if (write_dsp(chip, chip->comm_page_phys) < 0) {
458                                 dev_err(chip->card->dev,
459                                         "load_dsp: Failed to write comm page address\n");
460                                 return -EIO;
461                         }
462 
463                         /* Get the serial number via slave mode.
464                         This is triggered by the SET_COMMPAGE_ADDR command.
465                         We don't actually use the serial number but we have to
466                         get it as part of the DSP init voodoo. */
467                         if (read_sn(chip) < 0) {
468                                 dev_err(chip->card->dev,
469                                         "load_dsp: Failed to read serial number\n");
470                                 return -EIO;
471                         }
472 
473                         chip->dsp_code = code;          /* Show which DSP code loaded */
474                         chip->bad_board = false;        /* DSP OK */
475                         return 0;
476                 }
477                 udelay(100);
478         }
479 
480         dev_err(chip->card->dev,
481                 "load_dsp: DSP load timed out waiting for HF4\n");
482         return -EIO;
483 }
484 
485 
486 
487 /* load_firmware takes care of loading the DSP and any ASIC code. */
488 static int load_firmware(struct echoaudio *chip)
489 {
490         const struct firmware *fw;
491         int box_type, err;
492 
493         if (snd_BUG_ON(!chip->comm_page))
494                 return -EPERM;
495 
496         /* See if the ASIC is present and working - only if the DSP is already loaded */
497         if (chip->dsp_code) {
498                 if ((box_type = check_asic_status(chip)) >= 0)
499                         return box_type;
500                 /* ASIC check failed; force the DSP to reload */
501                 chip->dsp_code = NULL;
502         }
503 
504         err = get_firmware(&fw, chip, chip->dsp_code_to_load);
505         if (err < 0)
506                 return err;
507         err = load_dsp(chip, (u16 *)fw->data);
508         free_firmware(fw, chip);
509         if (err < 0)
510                 return err;
511 
512         if ((box_type = load_asic(chip)) < 0)
513                 return box_type;        /* error */
514 
515         return box_type;
516 }
517 
518 
519 
520 /****************************************************************************
521         Mixer functions
522  ****************************************************************************/
523 
524 #if defined(ECHOCARD_HAS_INPUT_NOMINAL_LEVEL) || \
525         defined(ECHOCARD_HAS_OUTPUT_NOMINAL_LEVEL)
526 
527 /* Set the nominal level for an input or output bus (true = -10dBV, false = +4dBu) */
528 static int set_nominal_level(struct echoaudio *chip, u16 index, char consumer)
529 {
530         if (snd_BUG_ON(index >= num_busses_out(chip) + num_busses_in(chip)))
531                 return -EINVAL;
532 
533         /* Wait for the handshake (OK even if ASIC is not loaded) */
534         if (wait_handshake(chip))
535                 return -EIO;
536 
537         chip->nominal_level[index] = consumer;
538 
539         if (consumer)
540                 chip->comm_page->nominal_level_mask |= cpu_to_le32(1 << index);
541         else
542                 chip->comm_page->nominal_level_mask &= ~cpu_to_le32(1 << index);
543 
544         return 0;
545 }
546 
547 #endif /* ECHOCARD_HAS_*_NOMINAL_LEVEL */
548 
549 
550 
551 /* Set the gain for a single physical output channel (dB). */
552 static int set_output_gain(struct echoaudio *chip, u16 channel, s8 gain)
553 {
554         if (snd_BUG_ON(channel >= num_busses_out(chip)))
555                 return -EINVAL;
556 
557         if (wait_handshake(chip))
558                 return -EIO;
559 
560         /* Save the new value */
561         chip->output_gain[channel] = gain;
562         chip->comm_page->line_out_level[channel] = gain;
563         return 0;
564 }
565 
566 
567 
568 #ifdef ECHOCARD_HAS_MONITOR
569 /* Set the monitor level from an input bus to an output bus. */
570 static int set_monitor_gain(struct echoaudio *chip, u16 output, u16 input,
571                             s8 gain)
572 {
573         if (snd_BUG_ON(output >= num_busses_out(chip) ||
574                     input >= num_busses_in(chip)))
575                 return -EINVAL;
576 
577         if (wait_handshake(chip))
578                 return -EIO;
579 
580         chip->monitor_gain[output][input] = gain;
581         chip->comm_page->monitors[monitor_index(chip, output, input)] = gain;
582         return 0;
583 }
584 #endif /* ECHOCARD_HAS_MONITOR */
585 
586 
587 /* Tell the DSP to read and update output, nominal & monitor levels in comm page. */
588 static int update_output_line_level(struct echoaudio *chip)
589 {
590         if (wait_handshake(chip))
591                 return -EIO;
592         clear_handshake(chip);
593         return send_vector(chip, DSP_VC_UPDATE_OUTVOL);
594 }
595 
596 
597 
598 /* Tell the DSP to read and update input levels in comm page */
599 static int update_input_line_level(struct echoaudio *chip)
600 {
601         if (wait_handshake(chip))
602                 return -EIO;
603         clear_handshake(chip);
604         return send_vector(chip, DSP_VC_UPDATE_INGAIN);
605 }
606 
607 
608 
609 /* set_meters_on turns the meters on or off.  If meters are turned on, the DSP
610 will write the meter and clock detect values to the comm page at about 30Hz */
611 static void set_meters_on(struct echoaudio *chip, char on)
612 {
613         if (on && !chip->meters_enabled) {
614                 send_vector(chip, DSP_VC_METERS_ON);
615                 chip->meters_enabled = 1;
616         } else if (!on && chip->meters_enabled) {
617                 send_vector(chip, DSP_VC_METERS_OFF);
618                 chip->meters_enabled = 0;
619                 memset((s8 *)chip->comm_page->vu_meter, ECHOGAIN_MUTED,
620                        DSP_MAXPIPES);
621                 memset((s8 *)chip->comm_page->peak_meter, ECHOGAIN_MUTED,
622                        DSP_MAXPIPES);
623         }
624 }
625 
626 
627 
628 /* Fill out an the given array using the current values in the comm page.
629 Meters are written in the comm page by the DSP in this order:
630  Output busses
631  Input busses
632  Output pipes (vmixer cards only)
633 
634 This function assumes there are no more than 16 in/out busses or pipes
635 Meters is an array [3][16][2] of long. */
636 static void get_audio_meters(struct echoaudio *chip, long *meters)
637 {
638         int i, m, n;
639 
640         m = 0;
641         n = 0;
642         for (i = 0; i < num_busses_out(chip); i++, m++) {
643                 meters[n++] = chip->comm_page->vu_meter[m];
644                 meters[n++] = chip->comm_page->peak_meter[m];
645         }
646         for (; n < 32; n++)
647                 meters[n] = 0;
648 
649 #ifdef ECHOCARD_ECHO3G
650         m = E3G_MAX_OUTPUTS;    /* Skip unused meters */
651 #endif
652 
653         for (i = 0; i < num_busses_in(chip); i++, m++) {
654                 meters[n++] = chip->comm_page->vu_meter[m];
655                 meters[n++] = chip->comm_page->peak_meter[m];
656         }
657         for (; n < 64; n++)
658                 meters[n] = 0;
659 
660 #ifdef ECHOCARD_HAS_VMIXER
661         for (i = 0; i < num_pipes_out(chip); i++, m++) {
662                 meters[n++] = chip->comm_page->vu_meter[m];
663                 meters[n++] = chip->comm_page->peak_meter[m];
664         }
665 #endif
666         for (; n < 96; n++)
667                 meters[n] = 0;
668 }
669 
670 
671 
672 static int restore_dsp_rettings(struct echoaudio *chip)
673 {
674         int i, o, err;
675 
676         if ((err = check_asic_status(chip)) < 0)
677                 return err;
678 
679         /* Gina20/Darla20 only. Should be harmless for other cards. */
680         chip->comm_page->gd_clock_state = GD_CLOCK_UNDEF;
681         chip->comm_page->gd_spdif_status = GD_SPDIF_STATUS_UNDEF;
682         chip->comm_page->handshake = cpu_to_le32(0xffffffff);
683 
684         /* Restore output busses */
685         for (i = 0; i < num_busses_out(chip); i++) {
686                 err = set_output_gain(chip, i, chip->output_gain[i]);
687                 if (err < 0)
688                         return err;
689         }
690 
691 #ifdef ECHOCARD_HAS_VMIXER
692         for (i = 0; i < num_pipes_out(chip); i++)
693                 for (o = 0; o < num_busses_out(chip); o++) {
694                         err = set_vmixer_gain(chip, o, i,
695                                                 chip->vmixer_gain[o][i]);
696                         if (err < 0)
697                                 return err;
698                 }
699         if (update_vmixer_level(chip) < 0)
700                 return -EIO;
701 #endif /* ECHOCARD_HAS_VMIXER */
702 
703 #ifdef ECHOCARD_HAS_MONITOR
704         for (o = 0; o < num_busses_out(chip); o++)
705                 for (i = 0; i < num_busses_in(chip); i++) {
706                         err = set_monitor_gain(chip, o, i,
707                                                 chip->monitor_gain[o][i]);
708                         if (err < 0)
709                                 return err;
710                 }
711 #endif /* ECHOCARD_HAS_MONITOR */
712 
713 #ifdef ECHOCARD_HAS_INPUT_GAIN
714         for (i = 0; i < num_busses_in(chip); i++) {
715                 err = set_input_gain(chip, i, chip->input_gain[i]);
716                 if (err < 0)
717                         return err;
718         }
719 #endif /* ECHOCARD_HAS_INPUT_GAIN */
720 
721         err = update_output_line_level(chip);
722         if (err < 0)
723                 return err;
724 
725         err = update_input_line_level(chip);
726         if (err < 0)
727                 return err;
728 
729         err = set_sample_rate(chip, chip->sample_rate);
730         if (err < 0)
731                 return err;
732 
733         if (chip->meters_enabled) {
734                 err = send_vector(chip, DSP_VC_METERS_ON);
735                 if (err < 0)
736                         return err;
737         }
738 
739 #ifdef ECHOCARD_HAS_DIGITAL_MODE_SWITCH
740         if (set_digital_mode(chip, chip->digital_mode) < 0)
741                 return -EIO;
742 #endif
743 
744 #ifdef ECHOCARD_HAS_DIGITAL_IO
745         if (set_professional_spdif(chip, chip->professional_spdif) < 0)
746                 return -EIO;
747 #endif
748 
749 #ifdef ECHOCARD_HAS_PHANTOM_POWER
750         if (set_phantom_power(chip, chip->phantom_power) < 0)
751                 return -EIO;
752 #endif
753 
754 #ifdef ECHOCARD_HAS_EXTERNAL_CLOCK
755         /* set_input_clock() also restores automute setting */
756         if (set_input_clock(chip, chip->input_clock) < 0)
757                 return -EIO;
758 #endif
759 
760 #ifdef ECHOCARD_HAS_OUTPUT_CLOCK_SWITCH
761         if (set_output_clock(chip, chip->output_clock) < 0)
762                 return -EIO;
763 #endif
764 
765         if (wait_handshake(chip) < 0)
766                 return -EIO;
767         clear_handshake(chip);
768         if (send_vector(chip, DSP_VC_UPDATE_FLAGS) < 0)
769                 return -EIO;
770 
771         return 0;
772 }
773 
774 
775 
776 /****************************************************************************
777         Transport functions
778  ****************************************************************************/
779 
780 /* set_audio_format() sets the format of the audio data in host memory for
781 this pipe.  Note that _MS_ (mono-to-stereo) playback modes are not used by ALSA
782 but they are here because they are just mono while capturing */
783 static void set_audio_format(struct echoaudio *chip, u16 pipe_index,
784                              const struct audioformat *format)
785 {
786         u16 dsp_format;
787 
788         dsp_format = DSP_AUDIOFORM_SS_16LE;
789 
790         /* Look for super-interleave (no big-endian and 8 bits) */
791         if (format->interleave > 2) {
792                 switch (format->bits_per_sample) {
793                 case 16:
794                         dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_16LE;
795                         break;
796                 case 24:
797                         dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_24LE;
798                         break;
799                 case 32:
800                         dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_32LE;
801                         break;
802                 }
803                 dsp_format |= format->interleave;
804         } else if (format->data_are_bigendian) {
805                 /* For big-endian data, only 32 bit samples are supported */
806                 switch (format->interleave) {
807                 case 1:
808                         dsp_format = DSP_AUDIOFORM_MM_32BE;
809                         break;
810 #ifdef ECHOCARD_HAS_STEREO_BIG_ENDIAN32
811                 case 2:
812                         dsp_format = DSP_AUDIOFORM_SS_32BE;
813                         break;
814 #endif
815                 }
816         } else if (format->interleave == 1 &&
817                    format->bits_per_sample == 32 && !format->mono_to_stereo) {
818                 /* 32 bit little-endian mono->mono case */
819                 dsp_format = DSP_AUDIOFORM_MM_32LE;
820         } else {
821                 /* Handle the other little-endian formats */
822                 switch (format->bits_per_sample) {
823                 case 8:
824                         if (format->interleave == 2)
825                                 dsp_format = DSP_AUDIOFORM_SS_8;
826                         else
827                                 dsp_format = DSP_AUDIOFORM_MS_8;
828                         break;
829                 default:
830                 case 16:
831                         if (format->interleave == 2)
832                                 dsp_format = DSP_AUDIOFORM_SS_16LE;
833                         else
834                                 dsp_format = DSP_AUDIOFORM_MS_16LE;
835                         break;
836                 case 24:
837                         if (format->interleave == 2)
838                                 dsp_format = DSP_AUDIOFORM_SS_24LE;
839                         else
840                                 dsp_format = DSP_AUDIOFORM_MS_24LE;
841                         break;
842                 case 32:
843                         if (format->interleave == 2)
844                                 dsp_format = DSP_AUDIOFORM_SS_32LE;
845                         else
846                                 dsp_format = DSP_AUDIOFORM_MS_32LE;
847                         break;
848                 }
849         }
850         dev_dbg(chip->card->dev,
851                  "set_audio_format[%d] = %x\n", pipe_index, dsp_format);
852         chip->comm_page->audio_format[pipe_index] = cpu_to_le16(dsp_format);
853 }
854 
855 
856 
857 /* start_transport starts transport for a set of pipes.
858 The bits 1 in channel_mask specify what pipes to start. Only the bit of the
859 first channel must be set, regardless its interleave.
860 Same thing for pause_ and stop_ -trasport below. */
861 static int start_transport(struct echoaudio *chip, u32 channel_mask,
862                            u32 cyclic_mask)
863 {
864 
865         if (wait_handshake(chip))
866                 return -EIO;
867 
868         chip->comm_page->cmd_start |= cpu_to_le32(channel_mask);
869 
870         if (chip->comm_page->cmd_start) {
871                 clear_handshake(chip);
872                 send_vector(chip, DSP_VC_START_TRANSFER);
873                 if (wait_handshake(chip))
874                         return -EIO;
875                 /* Keep track of which pipes are transporting */
876                 chip->active_mask |= channel_mask;
877                 chip->comm_page->cmd_start = 0;
878                 return 0;
879         }
880 
881         dev_err(chip->card->dev, "start_transport: No pipes to start!\n");
882         return -EINVAL;
883 }
884 
885 
886 
887 static int pause_transport(struct echoaudio *chip, u32 channel_mask)
888 {
889 
890         if (wait_handshake(chip))
891                 return -EIO;
892 
893         chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask);
894         chip->comm_page->cmd_reset = 0;
895         if (chip->comm_page->cmd_stop) {
896                 clear_handshake(chip);
897                 send_vector(chip, DSP_VC_STOP_TRANSFER);
898                 if (wait_handshake(chip))
899                         return -EIO;
900                 /* Keep track of which pipes are transporting */
901                 chip->active_mask &= ~channel_mask;
902                 chip->comm_page->cmd_stop = 0;
903                 chip->comm_page->cmd_reset = 0;
904                 return 0;
905         }
906 
907         dev_warn(chip->card->dev, "pause_transport: No pipes to stop!\n");
908         return 0;
909 }
910 
911 
912 
913 static int stop_transport(struct echoaudio *chip, u32 channel_mask)
914 {
915 
916         if (wait_handshake(chip))
917                 return -EIO;
918 
919         chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask);
920         chip->comm_page->cmd_reset |= cpu_to_le32(channel_mask);
921         if (chip->comm_page->cmd_reset) {
922                 clear_handshake(chip);
923                 send_vector(chip, DSP_VC_STOP_TRANSFER);
924                 if (wait_handshake(chip))
925                         return -EIO;
926                 /* Keep track of which pipes are transporting */
927                 chip->active_mask &= ~channel_mask;
928                 chip->comm_page->cmd_stop = 0;
929                 chip->comm_page->cmd_reset = 0;
930                 return 0;
931         }
932 
933         dev_warn(chip->card->dev, "stop_transport: No pipes to stop!\n");
934         return 0;
935 }
936 
937 
938 
939 static inline int is_pipe_allocated(struct echoaudio *chip, u16 pipe_index)
940 {
941         return (chip->pipe_alloc_mask & (1 << pipe_index));
942 }
943 
944 
945 
946 /* Stops everything and turns off the DSP. All pipes should be already
947 stopped and unallocated. */
948 static int rest_in_peace(struct echoaudio *chip)
949 {
950 
951         /* Stops all active pipes (just to be sure) */
952         stop_transport(chip, chip->active_mask);
953 
954         set_meters_on(chip, false);
955 
956 #ifdef ECHOCARD_HAS_MIDI
957         enable_midi_input(chip, false);
958 #endif
959 
960         /* Go to sleep */
961         if (chip->dsp_code) {
962                 /* Make load_firmware do a complete reload */
963                 chip->dsp_code = NULL;
964                 /* Put the DSP to sleep */
965                 return send_vector(chip, DSP_VC_GO_COMATOSE);
966         }
967         return 0;
968 }
969 
970 
971 
972 /* Fills the comm page with default values */
973 static int init_dsp_comm_page(struct echoaudio *chip)
974 {
975         /* Check if the compiler added extra padding inside the structure */
976         if (offsetof(struct comm_page, midi_output) != 0xbe0) {
977                 dev_err(chip->card->dev,
978                         "init_dsp_comm_page() - Invalid struct comm_page structure\n");
979                 return -EPERM;
980         }
981 
982         /* Init all the basic stuff */
983         chip->card_name = ECHOCARD_NAME;
984         chip->bad_board = true; /* Set true until DSP loaded */
985         chip->dsp_code = NULL;  /* Current DSP code not loaded */
986         chip->asic_loaded = false;
987         memset(chip->comm_page, 0, sizeof(struct comm_page));
988 
989         /* Init the comm page */
990         chip->comm_page->comm_size =
991                 cpu_to_le32(sizeof(struct comm_page));
992         chip->comm_page->handshake = cpu_to_le32(0xffffffff);
993         chip->comm_page->midi_out_free_count =
994                 cpu_to_le32(DSP_MIDI_OUT_FIFO_SIZE);
995         chip->comm_page->sample_rate = cpu_to_le32(44100);
996 
997         /* Set line levels so we don't blast any inputs on startup */
998         memset(chip->comm_page->monitors, ECHOGAIN_MUTED, MONITOR_ARRAY_SIZE);
999         memset(chip->comm_page->vmixer, ECHOGAIN_MUTED, VMIXER_ARRAY_SIZE);
1000 
1001         return 0;
1002 }
1003 
1004 
1005 
1006 /* This function initializes the chip structure with default values, ie. all
1007  * muted and internal clock source. Then it copies the settings to the DSP.
1008  * This MUST be called after the DSP is up and running !
1009  */
1010 static int init_line_levels(struct echoaudio *chip)
1011 {
1012         memset(chip->output_gain, ECHOGAIN_MUTED, sizeof(chip->output_gain));
1013         memset(chip->input_gain, ECHOGAIN_MUTED, sizeof(chip->input_gain));
1014         memset(chip->monitor_gain, ECHOGAIN_MUTED, sizeof(chip->monitor_gain));
1015         memset(chip->vmixer_gain, ECHOGAIN_MUTED, sizeof(chip->vmixer_gain));
1016         chip->input_clock = ECHO_CLOCK_INTERNAL;
1017         chip->output_clock = ECHO_CLOCK_WORD;
1018         chip->sample_rate = 44100;
1019         return restore_dsp_rettings(chip);
1020 }
1021 
1022 
1023 
1024 /* This is low level part of the interrupt handler.
1025 It returns -1 if the IRQ is not ours, or N>=0 if it is, where N is the number
1026 of midi data in the input queue. */
1027 static int service_irq(struct echoaudio *chip)
1028 {
1029         int st;
1030 
1031         /* Read the DSP status register and see if this DSP generated this interrupt */
1032         if (get_dsp_register(chip, CHI32_STATUS_REG) & CHI32_STATUS_IRQ) {
1033                 st = 0;
1034 #ifdef ECHOCARD_HAS_MIDI
1035                 /* Get and parse midi data if present */
1036                 if (chip->comm_page->midi_input[0])     /* The count is at index 0 */
1037                         st = midi_service_irq(chip);    /* Returns how many midi bytes we received */
1038 #endif
1039                 /* Clear the hardware interrupt */
1040                 chip->comm_page->midi_input[0] = 0;
1041                 send_vector(chip, DSP_VC_ACK_INT);
1042                 return st;
1043         }
1044         return -1;
1045 }
1046 
1047 
1048 
1049 
1050 /******************************************************************************
1051         Functions for opening and closing pipes
1052  ******************************************************************************/
1053 
1054 /* allocate_pipes is used to reserve audio pipes for your exclusive use.
1055 The call will fail if some pipes are already allocated. */
1056 static int allocate_pipes(struct echoaudio *chip, struct audiopipe *pipe,
1057                           int pipe_index, int interleave)
1058 {
1059         int i;
1060         u32 channel_mask;
1061 
1062         dev_dbg(chip->card->dev,
1063                 "allocate_pipes: ch=%d int=%d\n", pipe_index, interleave);
1064 
1065         if (chip->bad_board)
1066                 return -EIO;
1067 
1068         for (channel_mask = i = 0; i < interleave; i++)
1069                 channel_mask |= 1 << (pipe_index + i);
1070         if (chip->pipe_alloc_mask & channel_mask) {
1071                 dev_err(chip->card->dev,
1072                         "allocate_pipes: channel already open\n");
1073                 return -EAGAIN;
1074         }
1075 
1076         chip->comm_page->position[pipe_index] = 0;
1077         chip->pipe_alloc_mask |= channel_mask;
1078         /* This driver uses cyclic buffers only */
1079         chip->pipe_cyclic_mask |= channel_mask;
1080         pipe->index = pipe_index;
1081         pipe->interleave = interleave;
1082         pipe->state = PIPE_STATE_STOPPED;
1083 
1084         /* The counter register is where the DSP writes the 32 bit DMA
1085         position for a pipe.  The DSP is constantly updating this value as
1086         it moves data. The DMA counter is in units of bytes, not samples. */
1087         pipe->dma_counter = (__le32 *)&chip->comm_page->position[pipe_index];
1088         *pipe->dma_counter = 0;
1089         return pipe_index;
1090 }
1091 
1092 
1093 
1094 static int free_pipes(struct echoaudio *chip, struct audiopipe *pipe)
1095 {
1096         u32 channel_mask;
1097         int i;
1098 
1099         if (snd_BUG_ON(!is_pipe_allocated(chip, pipe->index)))
1100                 return -EINVAL;
1101         if (snd_BUG_ON(pipe->state != PIPE_STATE_STOPPED))
1102                 return -EINVAL;
1103 
1104         for (channel_mask = i = 0; i < pipe->interleave; i++)
1105                 channel_mask |= 1 << (pipe->index + i);
1106 
1107         chip->pipe_alloc_mask &= ~channel_mask;
1108         chip->pipe_cyclic_mask &= ~channel_mask;
1109         return 0;
1110 }
1111 
1112 
1113 
1114 /******************************************************************************
1115         Functions for managing the scatter-gather list
1116 ******************************************************************************/
1117 
1118 static int sglist_init(struct echoaudio *chip, struct audiopipe *pipe)
1119 {
1120         pipe->sglist_head = 0;
1121         memset(pipe->sgpage.area, 0, PAGE_SIZE);
1122         chip->comm_page->sglist_addr[pipe->index].addr =
1123                 cpu_to_le32(pipe->sgpage.addr);
1124         return 0;
1125 }
1126 
1127 
1128 
1129 static int sglist_add_mapping(struct echoaudio *chip, struct audiopipe *pipe,
1130                                 dma_addr_t address, size_t length)
1131 {
1132         int head = pipe->sglist_head;
1133         struct sg_entry *list = (struct sg_entry *)pipe->sgpage.area;
1134 
1135         if (head < MAX_SGLIST_ENTRIES - 1) {
1136                 list[head].addr = cpu_to_le32(address);
1137                 list[head].size = cpu_to_le32(length);
1138                 pipe->sglist_head++;
1139         } else {
1140                 dev_err(chip->card->dev, "SGlist: too many fragments\n");
1141                 return -ENOMEM;
1142         }
1143         return 0;
1144 }
1145 
1146 
1147 
1148 static inline int sglist_add_irq(struct echoaudio *chip, struct audiopipe *pipe)
1149 {
1150         return sglist_add_mapping(chip, pipe, 0, 0);
1151 }
1152 
1153 
1154 
1155 static inline int sglist_wrap(struct echoaudio *chip, struct audiopipe *pipe)
1156 {
1157         return sglist_add_mapping(chip, pipe, pipe->sgpage.addr, 0);
1158 }
1159 

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