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 	unsigned int i, m, n;
639 
640 	for (i = 0 ; i < 96; i++)
641 		meters[i] = 0;
642 
643 	for (m = 0, n = 0, i = 0; i < num_busses_out(chip); i++, m++) {
644 		meters[n++] = chip->comm_page->vu_meter[m];
645 		meters[n++] = chip->comm_page->peak_meter[m];
646 	}
647 
648 #ifdef ECHOCARD_ECHO3G
649 	m = E3G_MAX_OUTPUTS;	/* Skip unused meters */
650 #endif
651 
652 	for (n = 32, i = 0; i < num_busses_in(chip); i++, m++) {
653 		meters[n++] = chip->comm_page->vu_meter[m];
654 		meters[n++] = chip->comm_page->peak_meter[m];
655 	}
656 #ifdef ECHOCARD_HAS_VMIXER
657 	for (n = 64, i = 0; i < num_pipes_out(chip); i++, m++) {
658 		meters[n++] = chip->comm_page->vu_meter[m];
659 		meters[n++] = chip->comm_page->peak_meter[m];
660 	}
661 #endif
662 }
663 
664 
665 
666 static int restore_dsp_rettings(struct echoaudio *chip)
667 {
668 	int i, o, err;
669 
670 	if ((err = check_asic_status(chip)) < 0)
671 		return err;
672 
673 	/* Gina20/Darla20 only. Should be harmless for other cards. */
674 	chip->comm_page->gd_clock_state = GD_CLOCK_UNDEF;
675 	chip->comm_page->gd_spdif_status = GD_SPDIF_STATUS_UNDEF;
676 	chip->comm_page->handshake = cpu_to_le32(0xffffffff);
677 
678 	/* Restore output busses */
679 	for (i = 0; i < num_busses_out(chip); i++) {
680 		err = set_output_gain(chip, i, chip->output_gain[i]);
681 		if (err < 0)
682 			return err;
683 	}
684 
685 #ifdef ECHOCARD_HAS_VMIXER
686 	for (i = 0; i < num_pipes_out(chip); i++)
687 		for (o = 0; o < num_busses_out(chip); o++) {
688 			err = set_vmixer_gain(chip, o, i,
689 						chip->vmixer_gain[o][i]);
690 			if (err < 0)
691 				return err;
692 		}
693 	if (update_vmixer_level(chip) < 0)
694 		return -EIO;
695 #endif /* ECHOCARD_HAS_VMIXER */
696 
697 #ifdef ECHOCARD_HAS_MONITOR
698 	for (o = 0; o < num_busses_out(chip); o++)
699 		for (i = 0; i < num_busses_in(chip); i++) {
700 			err = set_monitor_gain(chip, o, i,
701 						chip->monitor_gain[o][i]);
702 			if (err < 0)
703 				return err;
704 		}
705 #endif /* ECHOCARD_HAS_MONITOR */
706 
707 #ifdef ECHOCARD_HAS_INPUT_GAIN
708 	for (i = 0; i < num_busses_in(chip); i++) {
709 		err = set_input_gain(chip, i, chip->input_gain[i]);
710 		if (err < 0)
711 			return err;
712 	}
713 #endif /* ECHOCARD_HAS_INPUT_GAIN */
714 
715 	err = update_output_line_level(chip);
716 	if (err < 0)
717 		return err;
718 
719 	err = update_input_line_level(chip);
720 	if (err < 0)
721 		return err;
722 
723 	err = set_sample_rate(chip, chip->sample_rate);
724 	if (err < 0)
725 		return err;
726 
727 	if (chip->meters_enabled) {
728 		err = send_vector(chip, DSP_VC_METERS_ON);
729 		if (err < 0)
730 			return err;
731 	}
732 
733 #ifdef ECHOCARD_HAS_DIGITAL_MODE_SWITCH
734 	if (set_digital_mode(chip, chip->digital_mode) < 0)
735 		return -EIO;
736 #endif
737 
738 #ifdef ECHOCARD_HAS_DIGITAL_IO
739 	if (set_professional_spdif(chip, chip->professional_spdif) < 0)
740 		return -EIO;
741 #endif
742 
743 #ifdef ECHOCARD_HAS_PHANTOM_POWER
744 	if (set_phantom_power(chip, chip->phantom_power) < 0)
745 		return -EIO;
746 #endif
747 
748 #ifdef ECHOCARD_HAS_EXTERNAL_CLOCK
749 	/* set_input_clock() also restores automute setting */
750 	if (set_input_clock(chip, chip->input_clock) < 0)
751 		return -EIO;
752 #endif
753 
754 #ifdef ECHOCARD_HAS_OUTPUT_CLOCK_SWITCH
755 	if (set_output_clock(chip, chip->output_clock) < 0)
756 		return -EIO;
757 #endif
758 
759 	if (wait_handshake(chip) < 0)
760 		return -EIO;
761 	clear_handshake(chip);
762 	if (send_vector(chip, DSP_VC_UPDATE_FLAGS) < 0)
763 		return -EIO;
764 
765 	return 0;
766 }
767 
768 
769 
770 /****************************************************************************
771 	Transport functions
772  ****************************************************************************/
773 
774 /* set_audio_format() sets the format of the audio data in host memory for
775 this pipe.  Note that _MS_ (mono-to-stereo) playback modes are not used by ALSA
776 but they are here because they are just mono while capturing */
777 static void set_audio_format(struct echoaudio *chip, u16 pipe_index,
778 			     const struct audioformat *format)
779 {
780 	u16 dsp_format;
781 
782 	dsp_format = DSP_AUDIOFORM_SS_16LE;
783 
784 	/* Look for super-interleave (no big-endian and 8 bits) */
785 	if (format->interleave > 2) {
786 		switch (format->bits_per_sample) {
787 		case 16:
788 			dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_16LE;
789 			break;
790 		case 24:
791 			dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_24LE;
792 			break;
793 		case 32:
794 			dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_32LE;
795 			break;
796 		}
797 		dsp_format |= format->interleave;
798 	} else if (format->data_are_bigendian) {
799 		/* For big-endian data, only 32 bit samples are supported */
800 		switch (format->interleave) {
801 		case 1:
802 			dsp_format = DSP_AUDIOFORM_MM_32BE;
803 			break;
804 #ifdef ECHOCARD_HAS_STEREO_BIG_ENDIAN32
805 		case 2:
806 			dsp_format = DSP_AUDIOFORM_SS_32BE;
807 			break;
808 #endif
809 		}
810 	} else if (format->interleave == 1 &&
811 		   format->bits_per_sample == 32 && !format->mono_to_stereo) {
812 		/* 32 bit little-endian mono->mono case */
813 		dsp_format = DSP_AUDIOFORM_MM_32LE;
814 	} else {
815 		/* Handle the other little-endian formats */
816 		switch (format->bits_per_sample) {
817 		case 8:
818 			if (format->interleave == 2)
819 				dsp_format = DSP_AUDIOFORM_SS_8;
820 			else
821 				dsp_format = DSP_AUDIOFORM_MS_8;
822 			break;
823 		default:
824 		case 16:
825 			if (format->interleave == 2)
826 				dsp_format = DSP_AUDIOFORM_SS_16LE;
827 			else
828 				dsp_format = DSP_AUDIOFORM_MS_16LE;
829 			break;
830 		case 24:
831 			if (format->interleave == 2)
832 				dsp_format = DSP_AUDIOFORM_SS_24LE;
833 			else
834 				dsp_format = DSP_AUDIOFORM_MS_24LE;
835 			break;
836 		case 32:
837 			if (format->interleave == 2)
838 				dsp_format = DSP_AUDIOFORM_SS_32LE;
839 			else
840 				dsp_format = DSP_AUDIOFORM_MS_32LE;
841 			break;
842 		}
843 	}
844 	dev_dbg(chip->card->dev,
845 		 "set_audio_format[%d] = %x\n", pipe_index, dsp_format);
846 	chip->comm_page->audio_format[pipe_index] = cpu_to_le16(dsp_format);
847 }
848 
849 
850 
851 /* start_transport starts transport for a set of pipes.
852 The bits 1 in channel_mask specify what pipes to start. Only the bit of the
853 first channel must be set, regardless its interleave.
854 Same thing for pause_ and stop_ -trasport below. */
855 static int start_transport(struct echoaudio *chip, u32 channel_mask,
856 			   u32 cyclic_mask)
857 {
858 
859 	if (wait_handshake(chip))
860 		return -EIO;
861 
862 	chip->comm_page->cmd_start |= cpu_to_le32(channel_mask);
863 
864 	if (chip->comm_page->cmd_start) {
865 		clear_handshake(chip);
866 		send_vector(chip, DSP_VC_START_TRANSFER);
867 		if (wait_handshake(chip))
868 			return -EIO;
869 		/* Keep track of which pipes are transporting */
870 		chip->active_mask |= channel_mask;
871 		chip->comm_page->cmd_start = 0;
872 		return 0;
873 	}
874 
875 	dev_err(chip->card->dev, "start_transport: No pipes to start!\n");
876 	return -EINVAL;
877 }
878 
879 
880 
881 static int pause_transport(struct echoaudio *chip, u32 channel_mask)
882 {
883 
884 	if (wait_handshake(chip))
885 		return -EIO;
886 
887 	chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask);
888 	chip->comm_page->cmd_reset = 0;
889 	if (chip->comm_page->cmd_stop) {
890 		clear_handshake(chip);
891 		send_vector(chip, DSP_VC_STOP_TRANSFER);
892 		if (wait_handshake(chip))
893 			return -EIO;
894 		/* Keep track of which pipes are transporting */
895 		chip->active_mask &= ~channel_mask;
896 		chip->comm_page->cmd_stop = 0;
897 		chip->comm_page->cmd_reset = 0;
898 		return 0;
899 	}
900 
901 	dev_warn(chip->card->dev, "pause_transport: No pipes to stop!\n");
902 	return 0;
903 }
904 
905 
906 
907 static int stop_transport(struct echoaudio *chip, u32 channel_mask)
908 {
909 
910 	if (wait_handshake(chip))
911 		return -EIO;
912 
913 	chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask);
914 	chip->comm_page->cmd_reset |= cpu_to_le32(channel_mask);
915 	if (chip->comm_page->cmd_reset) {
916 		clear_handshake(chip);
917 		send_vector(chip, DSP_VC_STOP_TRANSFER);
918 		if (wait_handshake(chip))
919 			return -EIO;
920 		/* Keep track of which pipes are transporting */
921 		chip->active_mask &= ~channel_mask;
922 		chip->comm_page->cmd_stop = 0;
923 		chip->comm_page->cmd_reset = 0;
924 		return 0;
925 	}
926 
927 	dev_warn(chip->card->dev, "stop_transport: No pipes to stop!\n");
928 	return 0;
929 }
930 
931 
932 
933 static inline int is_pipe_allocated(struct echoaudio *chip, u16 pipe_index)
934 {
935 	return (chip->pipe_alloc_mask & (1 << pipe_index));
936 }
937 
938 
939 
940 /* Stops everything and turns off the DSP. All pipes should be already
941 stopped and unallocated. */
942 static int rest_in_peace(struct echoaudio *chip)
943 {
944 
945 	/* Stops all active pipes (just to be sure) */
946 	stop_transport(chip, chip->active_mask);
947 
948 	set_meters_on(chip, false);
949 
950 #ifdef ECHOCARD_HAS_MIDI
951 	enable_midi_input(chip, false);
952 #endif
953 
954 	/* Go to sleep */
955 	if (chip->dsp_code) {
956 		/* Make load_firmware do a complete reload */
957 		chip->dsp_code = NULL;
958 		/* Put the DSP to sleep */
959 		return send_vector(chip, DSP_VC_GO_COMATOSE);
960 	}
961 	return 0;
962 }
963 
964 
965 
966 /* Fills the comm page with default values */
967 static int init_dsp_comm_page(struct echoaudio *chip)
968 {
969 	/* Check if the compiler added extra padding inside the structure */
970 	if (offsetof(struct comm_page, midi_output) != 0xbe0) {
971 		dev_err(chip->card->dev,
972 			"init_dsp_comm_page() - Invalid struct comm_page structure\n");
973 		return -EPERM;
974 	}
975 
976 	/* Init all the basic stuff */
977 	chip->card_name = ECHOCARD_NAME;
978 	chip->bad_board = true;	/* Set true until DSP loaded */
979 	chip->dsp_code = NULL;	/* Current DSP code not loaded */
980 	chip->asic_loaded = false;
981 	memset(chip->comm_page, 0, sizeof(struct comm_page));
982 
983 	/* Init the comm page */
984 	chip->comm_page->comm_size =
985 		cpu_to_le32(sizeof(struct comm_page));
986 	chip->comm_page->handshake = cpu_to_le32(0xffffffff);
987 	chip->comm_page->midi_out_free_count =
988 		cpu_to_le32(DSP_MIDI_OUT_FIFO_SIZE);
989 	chip->comm_page->sample_rate = cpu_to_le32(44100);
990 
991 	/* Set line levels so we don't blast any inputs on startup */
992 	memset(chip->comm_page->monitors, ECHOGAIN_MUTED, MONITOR_ARRAY_SIZE);
993 	memset(chip->comm_page->vmixer, ECHOGAIN_MUTED, VMIXER_ARRAY_SIZE);
994 
995 	return 0;
996 }
997 
998 
999 
1000 /* This function initializes the chip structure with default values, ie. all
1001  * muted and internal clock source. Then it copies the settings to the DSP.
1002  * This MUST be called after the DSP is up and running !
1003  */
1004 static int init_line_levels(struct echoaudio *chip)
1005 {
1006 	memset(chip->output_gain, ECHOGAIN_MUTED, sizeof(chip->output_gain));
1007 	memset(chip->input_gain, ECHOGAIN_MUTED, sizeof(chip->input_gain));
1008 	memset(chip->monitor_gain, ECHOGAIN_MUTED, sizeof(chip->monitor_gain));
1009 	memset(chip->vmixer_gain, ECHOGAIN_MUTED, sizeof(chip->vmixer_gain));
1010 	chip->input_clock = ECHO_CLOCK_INTERNAL;
1011 	chip->output_clock = ECHO_CLOCK_WORD;
1012 	chip->sample_rate = 44100;
1013 	return restore_dsp_rettings(chip);
1014 }
1015 
1016 
1017 
1018 /* This is low level part of the interrupt handler.
1019 It returns -1 if the IRQ is not ours, or N>=0 if it is, where N is the number
1020 of midi data in the input queue. */
1021 static int service_irq(struct echoaudio *chip)
1022 {
1023 	int st;
1024 
1025 	/* Read the DSP status register and see if this DSP generated this interrupt */
1026 	if (get_dsp_register(chip, CHI32_STATUS_REG) & CHI32_STATUS_IRQ) {
1027 		st = 0;
1028 #ifdef ECHOCARD_HAS_MIDI
1029 		/* Get and parse midi data if present */
1030 		if (chip->comm_page->midi_input[0])	/* The count is at index 0 */
1031 			st = midi_service_irq(chip);	/* Returns how many midi bytes we received */
1032 #endif
1033 		/* Clear the hardware interrupt */
1034 		chip->comm_page->midi_input[0] = 0;
1035 		send_vector(chip, DSP_VC_ACK_INT);
1036 		return st;
1037 	}
1038 	return -1;
1039 }
1040 
1041 
1042 
1043 
1044 /******************************************************************************
1045 	Functions for opening and closing pipes
1046  ******************************************************************************/
1047 
1048 /* allocate_pipes is used to reserve audio pipes for your exclusive use.
1049 The call will fail if some pipes are already allocated. */
1050 static int allocate_pipes(struct echoaudio *chip, struct audiopipe *pipe,
1051 			  int pipe_index, int interleave)
1052 {
1053 	int i;
1054 	u32 channel_mask;
1055 
1056 	dev_dbg(chip->card->dev,
1057 		"allocate_pipes: ch=%d int=%d\n", pipe_index, interleave);
1058 
1059 	if (chip->bad_board)
1060 		return -EIO;
1061 
1062 	for (channel_mask = i = 0; i < interleave; i++)
1063 		channel_mask |= 1 << (pipe_index + i);
1064 	if (chip->pipe_alloc_mask & channel_mask) {
1065 		dev_err(chip->card->dev,
1066 			"allocate_pipes: channel already open\n");
1067 		return -EAGAIN;
1068 	}
1069 
1070 	chip->comm_page->position[pipe_index] = 0;
1071 	chip->pipe_alloc_mask |= channel_mask;
1072 	/* This driver uses cyclic buffers only */
1073 	chip->pipe_cyclic_mask |= channel_mask;
1074 	pipe->index = pipe_index;
1075 	pipe->interleave = interleave;
1076 	pipe->state = PIPE_STATE_STOPPED;
1077 
1078 	/* The counter register is where the DSP writes the 32 bit DMA
1079 	position for a pipe.  The DSP is constantly updating this value as
1080 	it moves data. The DMA counter is in units of bytes, not samples. */
1081 	pipe->dma_counter = (__le32 *)&chip->comm_page->position[pipe_index];
1082 	*pipe->dma_counter = 0;
1083 	return pipe_index;
1084 }
1085 
1086 
1087 
1088 static int free_pipes(struct echoaudio *chip, struct audiopipe *pipe)
1089 {
1090 	u32 channel_mask;
1091 	int i;
1092 
1093 	if (snd_BUG_ON(!is_pipe_allocated(chip, pipe->index)))
1094 		return -EINVAL;
1095 	if (snd_BUG_ON(pipe->state != PIPE_STATE_STOPPED))
1096 		return -EINVAL;
1097 
1098 	for (channel_mask = i = 0; i < pipe->interleave; i++)
1099 		channel_mask |= 1 << (pipe->index + i);
1100 
1101 	chip->pipe_alloc_mask &= ~channel_mask;
1102 	chip->pipe_cyclic_mask &= ~channel_mask;
1103 	return 0;
1104 }
1105 
1106 
1107 
1108 /******************************************************************************
1109 	Functions for managing the scatter-gather list
1110 ******************************************************************************/
1111 
1112 static int sglist_init(struct echoaudio *chip, struct audiopipe *pipe)
1113 {
1114 	pipe->sglist_head = 0;
1115 	memset(pipe->sgpage.area, 0, PAGE_SIZE);
1116 	chip->comm_page->sglist_addr[pipe->index].addr =
1117 		cpu_to_le32(pipe->sgpage.addr);
1118 	return 0;
1119 }
1120 
1121 
1122 
1123 static int sglist_add_mapping(struct echoaudio *chip, struct audiopipe *pipe,
1124 				dma_addr_t address, size_t length)
1125 {
1126 	int head = pipe->sglist_head;
1127 	struct sg_entry *list = (struct sg_entry *)pipe->sgpage.area;
1128 
1129 	if (head < MAX_SGLIST_ENTRIES - 1) {
1130 		list[head].addr = cpu_to_le32(address);
1131 		list[head].size = cpu_to_le32(length);
1132 		pipe->sglist_head++;
1133 	} else {
1134 		dev_err(chip->card->dev, "SGlist: too many fragments\n");
1135 		return -ENOMEM;
1136 	}
1137 	return 0;
1138 }
1139 
1140 
1141 
1142 static inline int sglist_add_irq(struct echoaudio *chip, struct audiopipe *pipe)
1143 {
1144 	return sglist_add_mapping(chip, pipe, 0, 0);
1145 }
1146 
1147 
1148 
1149 static inline int sglist_wrap(struct echoaudio *chip, struct audiopipe *pipe)
1150 {
1151 	return sglist_add_mapping(chip, pipe, pipe->sgpage.addr, 0);
1152 }
1153