1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for NeoMagic 256AV and 256ZX chipsets.
4 * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>
5 *
6 * Based on nm256_audio.c OSS driver in linux kernel.
7 * The original author of OSS nm256 driver wishes to remain anonymous,
8 * so I just put my acknoledgment to him/her here.
9 * The original author's web page is found at
10 * http://www.uglx.org/sony.html
11 */
12
13 #include <linux/io.h>
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/init.h>
17 #include <linux/pci.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20 #include <linux/mutex.h>
21
22 #include <sound/core.h>
23 #include <sound/info.h>
24 #include <sound/control.h>
25 #include <sound/pcm.h>
26 #include <sound/ac97_codec.h>
27 #include <sound/initval.h>
28
29 #define CARD_NAME "NeoMagic 256AV/ZX"
30 #define DRIVER_NAME "NM256"
31
32 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
33 MODULE_DESCRIPTION("NeoMagic NM256AV/ZX");
34 MODULE_LICENSE("GPL");
35
36 /*
37 * some compile conditions.
38 */
39
40 static int index = SNDRV_DEFAULT_IDX1; /* Index */
41 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
42 static int playback_bufsize = 16;
43 static int capture_bufsize = 16;
44 static bool force_ac97; /* disabled as default */
45 static int buffer_top; /* not specified */
46 static bool use_cache; /* disabled */
47 static bool vaio_hack; /* disabled */
48 static bool reset_workaround;
49 static bool reset_workaround_2;
50
51 module_param(index, int, 0444);
52 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
53 module_param(id, charp, 0444);
54 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
55 module_param(playback_bufsize, int, 0444);
56 MODULE_PARM_DESC(playback_bufsize, "DAC frame size in kB for " CARD_NAME " soundcard.");
57 module_param(capture_bufsize, int, 0444);
58 MODULE_PARM_DESC(capture_bufsize, "ADC frame size in kB for " CARD_NAME " soundcard.");
59 module_param(force_ac97, bool, 0444);
60 MODULE_PARM_DESC(force_ac97, "Force to use AC97 codec for " CARD_NAME " soundcard.");
61 module_param(buffer_top, int, 0444);
62 MODULE_PARM_DESC(buffer_top, "Set the top address of audio buffer for " CARD_NAME " soundcard.");
63 module_param(use_cache, bool, 0444);
64 MODULE_PARM_DESC(use_cache, "Enable the cache for coefficient table access.");
65 module_param(vaio_hack, bool, 0444);
66 MODULE_PARM_DESC(vaio_hack, "Enable workaround for Sony VAIO notebooks.");
67 module_param(reset_workaround, bool, 0444);
68 MODULE_PARM_DESC(reset_workaround, "Enable AC97 RESET workaround for some laptops.");
69 module_param(reset_workaround_2, bool, 0444);
70 MODULE_PARM_DESC(reset_workaround_2, "Enable extended AC97 RESET workaround for some other laptops.");
71
72 /* just for backward compatibility */
73 static bool enable;
74 module_param(enable, bool, 0444);
75
76
77
78 /*
79 * hw definitions
80 */
81
82 /* The BIOS signature. */
83 #define NM_SIGNATURE 0x4e4d0000
84 /* Signature mask. */
85 #define NM_SIG_MASK 0xffff0000
86
87 /* Size of the second memory area. */
88 #define NM_PORT2_SIZE 4096
89
90 /* The base offset of the mixer in the second memory area. */
91 #define NM_MIXER_OFFSET 0x600
92
93 /* The maximum size of a coefficient entry. */
94 #define NM_MAX_PLAYBACK_COEF_SIZE 0x5000
95 #define NM_MAX_RECORD_COEF_SIZE 0x1260
96
97 /* The interrupt register. */
98 #define NM_INT_REG 0xa04
99 /* And its bits. */
100 #define NM_PLAYBACK_INT 0x40
101 #define NM_RECORD_INT 0x100
102 #define NM_MISC_INT_1 0x4000
103 #define NM_MISC_INT_2 0x1
104 #define NM_ACK_INT(chip, X) snd_nm256_writew(chip, NM_INT_REG, (X) << 1)
105
106 /* The AV's "mixer ready" status bit and location. */
107 #define NM_MIXER_STATUS_OFFSET 0xa04
108 #define NM_MIXER_READY_MASK 0x0800
109 #define NM_MIXER_PRESENCE 0xa06
110 #define NM_PRESENCE_MASK 0x0050
111 #define NM_PRESENCE_VALUE 0x0040
112
113 /*
114 * For the ZX. It uses the same interrupt register, but it holds 32
115 * bits instead of 16.
116 */
117 #define NM2_PLAYBACK_INT 0x10000
118 #define NM2_RECORD_INT 0x80000
119 #define NM2_MISC_INT_1 0x8
120 #define NM2_MISC_INT_2 0x2
121 #define NM2_ACK_INT(chip, X) snd_nm256_writel(chip, NM_INT_REG, (X))
122
123 /* The ZX's "mixer ready" status bit and location. */
124 #define NM2_MIXER_STATUS_OFFSET 0xa06
125 #define NM2_MIXER_READY_MASK 0x0800
126
127 /* The playback registers start from here. */
128 #define NM_PLAYBACK_REG_OFFSET 0x0
129 /* The record registers start from here. */
130 #define NM_RECORD_REG_OFFSET 0x200
131
132 /* The rate register is located 2 bytes from the start of the register area. */
133 #define NM_RATE_REG_OFFSET 2
134
135 /* Mono/stereo flag, number of bits on playback, and rate mask. */
136 #define NM_RATE_STEREO 1
137 #define NM_RATE_BITS_16 2
138 #define NM_RATE_MASK 0xf0
139
140 /* Playback enable register. */
141 #define NM_PLAYBACK_ENABLE_REG (NM_PLAYBACK_REG_OFFSET + 0x1)
142 #define NM_PLAYBACK_ENABLE_FLAG 1
143 #define NM_PLAYBACK_ONESHOT 2
144 #define NM_PLAYBACK_FREERUN 4
145
146 /* Mutes the audio output. */
147 #define NM_AUDIO_MUTE_REG (NM_PLAYBACK_REG_OFFSET + 0x18)
148 #define NM_AUDIO_MUTE_LEFT 0x8000
149 #define NM_AUDIO_MUTE_RIGHT 0x0080
150
151 /* Recording enable register. */
152 #define NM_RECORD_ENABLE_REG (NM_RECORD_REG_OFFSET + 0)
153 #define NM_RECORD_ENABLE_FLAG 1
154 #define NM_RECORD_FREERUN 2
155
156 /* coefficient buffer pointer */
157 #define NM_COEFF_START_OFFSET 0x1c
158 #define NM_COEFF_END_OFFSET 0x20
159
160 /* DMA buffer offsets */
161 #define NM_RBUFFER_START (NM_RECORD_REG_OFFSET + 0x4)
162 #define NM_RBUFFER_END (NM_RECORD_REG_OFFSET + 0x10)
163 #define NM_RBUFFER_WMARK (NM_RECORD_REG_OFFSET + 0xc)
164 #define NM_RBUFFER_CURRP (NM_RECORD_REG_OFFSET + 0x8)
165
166 #define NM_PBUFFER_START (NM_PLAYBACK_REG_OFFSET + 0x4)
167 #define NM_PBUFFER_END (NM_PLAYBACK_REG_OFFSET + 0x14)
168 #define NM_PBUFFER_WMARK (NM_PLAYBACK_REG_OFFSET + 0xc)
169 #define NM_PBUFFER_CURRP (NM_PLAYBACK_REG_OFFSET + 0x8)
170
171 struct nm256_stream {
172
173 struct nm256 *chip;
174 struct snd_pcm_substream *substream;
175 int running;
176 int suspended;
177
178 u32 buf; /* offset from chip->buffer */
179 int bufsize; /* buffer size in bytes */
180 void __iomem *bufptr; /* mapped pointer */
181 unsigned long bufptr_addr; /* physical address of the mapped pointer */
182
183 int dma_size; /* buffer size of the substream in bytes */
184 int period_size; /* period size in bytes */
185 int periods; /* # of periods */
186 int shift; /* bit shifts */
187 int cur_period; /* current period # */
188
189 };
190
191 struct nm256 {
192
193 struct snd_card *card;
194
195 void __iomem *cport; /* control port */
196 unsigned long cport_addr; /* physical address */
197
198 void __iomem *buffer; /* buffer */
199 unsigned long buffer_addr; /* buffer phyiscal address */
200
201 u32 buffer_start; /* start offset from pci resource 0 */
202 u32 buffer_end; /* end offset */
203 u32 buffer_size; /* total buffer size */
204
205 u32 all_coeff_buf; /* coefficient buffer */
206 u32 coeff_buf[2]; /* coefficient buffer for each stream */
207
208 unsigned int coeffs_current: 1; /* coeff. table is loaded? */
209 unsigned int use_cache: 1; /* use one big coef. table */
210 unsigned int reset_workaround: 1; /* Workaround for some laptops to avoid freeze */
211 unsigned int reset_workaround_2: 1; /* Extended workaround for some other laptops to avoid freeze */
212 unsigned int in_resume: 1;
213
214 int mixer_base; /* register offset of ac97 mixer */
215 int mixer_status_offset; /* offset of mixer status reg. */
216 int mixer_status_mask; /* bit mask to test the mixer status */
217
218 int irq;
219 int irq_acks;
220 irq_handler_t interrupt;
221 int badintrcount; /* counter to check bogus interrupts */
222 struct mutex irq_mutex;
223
224 struct nm256_stream streams[2];
225
226 struct snd_ac97 *ac97;
227 unsigned short *ac97_regs; /* register caches, only for valid regs */
228
229 struct snd_pcm *pcm;
230
231 struct pci_dev *pci;
232
233 spinlock_t reg_lock;
234
235 };
236
237
238 /*
239 * include coefficient table
240 */
241 #include "nm256_coef.c"
242
243
244 /*
245 * PCI ids
246 */
247 static const struct pci_device_id snd_nm256_ids[] = {
248 {PCI_VDEVICE(NEOMAGIC, PCI_DEVICE_ID_NEOMAGIC_NM256AV_AUDIO), 0},
249 {PCI_VDEVICE(NEOMAGIC, PCI_DEVICE_ID_NEOMAGIC_NM256ZX_AUDIO), 0},
250 {PCI_VDEVICE(NEOMAGIC, PCI_DEVICE_ID_NEOMAGIC_NM256XL_PLUS_AUDIO), 0},
251 {0,},
252 };
253
254 MODULE_DEVICE_TABLE(pci, snd_nm256_ids);
255
256
257 /*
258 * lowlvel stuffs
259 */
260
261 static inline u8
262 snd_nm256_readb(struct nm256 *chip, int offset)
263 {
264 return readb(chip->cport + offset);
265 }
266
267 static inline u16
268 snd_nm256_readw(struct nm256 *chip, int offset)
269 {
270 return readw(chip->cport + offset);
271 }
272
273 static inline u32
274 snd_nm256_readl(struct nm256 *chip, int offset)
275 {
276 return readl(chip->cport + offset);
277 }
278
279 static inline void
280 snd_nm256_writeb(struct nm256 *chip, int offset, u8 val)
281 {
282 writeb(val, chip->cport + offset);
283 }
284
285 static inline void
286 snd_nm256_writew(struct nm256 *chip, int offset, u16 val)
287 {
288 writew(val, chip->cport + offset);
289 }
290
291 static inline void
292 snd_nm256_writel(struct nm256 *chip, int offset, u32 val)
293 {
294 writel(val, chip->cport + offset);
295 }
296
297 static inline void
298 snd_nm256_write_buffer(struct nm256 *chip, const void *src, int offset, int size)
299 {
300 offset -= chip->buffer_start;
301 #ifdef CONFIG_SND_DEBUG
302 if (offset < 0 || offset >= chip->buffer_size) {
303 dev_err(chip->card->dev,
304 "write_buffer invalid offset = %d size = %d\n",
305 offset, size);
306 return;
307 }
308 #endif
309 memcpy_toio(chip->buffer + offset, src, size);
310 }
311
312 /*
313 * coefficient handlers -- what a magic!
314 */
315
316 static u16
317 snd_nm256_get_start_offset(int which)
318 {
319 u16 offset = 0;
320 while (which-- > 0)
321 offset += coefficient_sizes[which];
322 return offset;
323 }
324
325 static void
326 snd_nm256_load_one_coefficient(struct nm256 *chip, int stream, u32 port, int which)
327 {
328 u32 coeff_buf = chip->coeff_buf[stream];
329 u16 offset = snd_nm256_get_start_offset(which);
330 u16 size = coefficient_sizes[which];
331
332 snd_nm256_write_buffer(chip, coefficients + offset, coeff_buf, size);
333 snd_nm256_writel(chip, port, coeff_buf);
334 /* ??? Record seems to behave differently than playback. */
335 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
336 size--;
337 snd_nm256_writel(chip, port + 4, coeff_buf + size);
338 }
339
340 static void
341 snd_nm256_load_coefficient(struct nm256 *chip, int stream, int number)
342 {
343 /* The enable register for the specified engine. */
344 u32 poffset = (stream == SNDRV_PCM_STREAM_CAPTURE ?
345 NM_RECORD_ENABLE_REG : NM_PLAYBACK_ENABLE_REG);
346 u32 addr = NM_COEFF_START_OFFSET;
347
348 addr += (stream == SNDRV_PCM_STREAM_CAPTURE ?
349 NM_RECORD_REG_OFFSET : NM_PLAYBACK_REG_OFFSET);
350
351 if (snd_nm256_readb(chip, poffset) & 1) {
352 dev_dbg(chip->card->dev,
353 "NM256: Engine was enabled while loading coefficients!\n");
354 return;
355 }
356
357 /* The recording engine uses coefficient values 8-15. */
358 number &= 7;
359 if (stream == SNDRV_PCM_STREAM_CAPTURE)
360 number += 8;
361
362 if (! chip->use_cache) {
363 snd_nm256_load_one_coefficient(chip, stream, addr, number);
364 return;
365 }
366 if (! chip->coeffs_current) {
367 snd_nm256_write_buffer(chip, coefficients, chip->all_coeff_buf,
368 NM_TOTAL_COEFF_COUNT * 4);
369 chip->coeffs_current = 1;
370 } else {
371 u32 base = chip->all_coeff_buf;
372 u32 offset = snd_nm256_get_start_offset(number);
373 u32 end_offset = offset + coefficient_sizes[number];
374 snd_nm256_writel(chip, addr, base + offset);
375 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
376 end_offset--;
377 snd_nm256_writel(chip, addr + 4, base + end_offset);
378 }
379 }
380
381
382 /* The actual rates supported by the card. */
383 static const unsigned int samplerates[8] = {
384 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000,
385 };
386 static const struct snd_pcm_hw_constraint_list constraints_rates = {
387 .count = ARRAY_SIZE(samplerates),
388 .list = samplerates,
389 .mask = 0,
390 };
391
392 /*
393 * return the index of the target rate
394 */
395 static int
396 snd_nm256_fixed_rate(unsigned int rate)
397 {
398 unsigned int i;
399 for (i = 0; i < ARRAY_SIZE(samplerates); i++) {
400 if (rate == samplerates[i])
401 return i;
402 }
403 snd_BUG();
404 return 0;
405 }
406
407 /*
408 * set sample rate and format
409 */
410 static void
411 snd_nm256_set_format(struct nm256 *chip, struct nm256_stream *s,
412 struct snd_pcm_substream *substream)
413 {
414 struct snd_pcm_runtime *runtime = substream->runtime;
415 int rate_index = snd_nm256_fixed_rate(runtime->rate);
416 unsigned char ratebits = (rate_index << 4) & NM_RATE_MASK;
417
418 s->shift = 0;
419 if (snd_pcm_format_width(runtime->format) == 16) {
420 ratebits |= NM_RATE_BITS_16;
421 s->shift++;
422 }
423 if (runtime->channels > 1) {
424 ratebits |= NM_RATE_STEREO;
425 s->shift++;
426 }
427
428 runtime->rate = samplerates[rate_index];
429
430 switch (substream->stream) {
431 case SNDRV_PCM_STREAM_PLAYBACK:
432 snd_nm256_load_coefficient(chip, 0, rate_index); /* 0 = playback */
433 snd_nm256_writeb(chip,
434 NM_PLAYBACK_REG_OFFSET + NM_RATE_REG_OFFSET,
435 ratebits);
436 break;
437 case SNDRV_PCM_STREAM_CAPTURE:
438 snd_nm256_load_coefficient(chip, 1, rate_index); /* 1 = record */
439 snd_nm256_writeb(chip,
440 NM_RECORD_REG_OFFSET + NM_RATE_REG_OFFSET,
441 ratebits);
442 break;
443 }
444 }
445
446 /* acquire interrupt */
447 static int snd_nm256_acquire_irq(struct nm256 *chip)
448 {
449 mutex_lock(&chip->irq_mutex);
450 if (chip->irq < 0) {
451 if (request_irq(chip->pci->irq, chip->interrupt, IRQF_SHARED,
452 KBUILD_MODNAME, chip)) {
453 dev_err(chip->card->dev,
454 "unable to grab IRQ %d\n", chip->pci->irq);
455 mutex_unlock(&chip->irq_mutex);
456 return -EBUSY;
457 }
458 chip->irq = chip->pci->irq;
459 chip->card->sync_irq = chip->irq;
460 }
461 chip->irq_acks++;
462 mutex_unlock(&chip->irq_mutex);
463 return 0;
464 }
465
466 /* release interrupt */
467 static void snd_nm256_release_irq(struct nm256 *chip)
468 {
469 mutex_lock(&chip->irq_mutex);
470 if (chip->irq_acks > 0)
471 chip->irq_acks--;
472 if (chip->irq_acks == 0 && chip->irq >= 0) {
473 free_irq(chip->irq, chip);
474 chip->irq = -1;
475 chip->card->sync_irq = -1;
476 }
477 mutex_unlock(&chip->irq_mutex);
478 }
479
480 /*
481 * start / stop
482 */
483
484 /* update the watermark (current period) */
485 static void snd_nm256_pcm_mark(struct nm256 *chip, struct nm256_stream *s, int reg)
486 {
487 s->cur_period++;
488 s->cur_period %= s->periods;
489 snd_nm256_writel(chip, reg, s->buf + s->cur_period * s->period_size);
490 }
491
492 #define snd_nm256_playback_mark(chip, s) snd_nm256_pcm_mark(chip, s, NM_PBUFFER_WMARK)
493 #define snd_nm256_capture_mark(chip, s) snd_nm256_pcm_mark(chip, s, NM_RBUFFER_WMARK)
494
495 static void
496 snd_nm256_playback_start(struct nm256 *chip, struct nm256_stream *s,
497 struct snd_pcm_substream *substream)
498 {
499 /* program buffer pointers */
500 snd_nm256_writel(chip, NM_PBUFFER_START, s->buf);
501 snd_nm256_writel(chip, NM_PBUFFER_END, s->buf + s->dma_size - (1 << s->shift));
502 snd_nm256_writel(chip, NM_PBUFFER_CURRP, s->buf);
503 snd_nm256_playback_mark(chip, s);
504
505 /* Enable playback engine and interrupts. */
506 snd_nm256_writeb(chip, NM_PLAYBACK_ENABLE_REG,
507 NM_PLAYBACK_ENABLE_FLAG | NM_PLAYBACK_FREERUN);
508 /* Enable both channels. */
509 snd_nm256_writew(chip, NM_AUDIO_MUTE_REG, 0x0);
510 }
511
512 static void
513 snd_nm256_capture_start(struct nm256 *chip, struct nm256_stream *s,
514 struct snd_pcm_substream *substream)
515 {
516 /* program buffer pointers */
517 snd_nm256_writel(chip, NM_RBUFFER_START, s->buf);
518 snd_nm256_writel(chip, NM_RBUFFER_END, s->buf + s->dma_size);
519 snd_nm256_writel(chip, NM_RBUFFER_CURRP, s->buf);
520 snd_nm256_capture_mark(chip, s);
521
522 /* Enable playback engine and interrupts. */
523 snd_nm256_writeb(chip, NM_RECORD_ENABLE_REG,
524 NM_RECORD_ENABLE_FLAG | NM_RECORD_FREERUN);
525 }
526
527 /* Stop the play engine. */
528 static void
529 snd_nm256_playback_stop(struct nm256 *chip)
530 {
531 /* Shut off sound from both channels. */
532 snd_nm256_writew(chip, NM_AUDIO_MUTE_REG,
533 NM_AUDIO_MUTE_LEFT | NM_AUDIO_MUTE_RIGHT);
534 /* Disable play engine. */
535 snd_nm256_writeb(chip, NM_PLAYBACK_ENABLE_REG, 0);
536 }
537
538 static void
539 snd_nm256_capture_stop(struct nm256 *chip)
540 {
541 /* Disable recording engine. */
542 snd_nm256_writeb(chip, NM_RECORD_ENABLE_REG, 0);
543 }
544
545 static int
546 snd_nm256_playback_trigger(struct snd_pcm_substream *substream, int cmd)
547 {
548 struct nm256 *chip = snd_pcm_substream_chip(substream);
549 struct nm256_stream *s = substream->runtime->private_data;
550 int err = 0;
551
552 if (snd_BUG_ON(!s))
553 return -ENXIO;
554
555 spin_lock(&chip->reg_lock);
556 switch (cmd) {
557 case SNDRV_PCM_TRIGGER_RESUME:
558 s->suspended = 0;
559 fallthrough;
560 case SNDRV_PCM_TRIGGER_START:
561 if (! s->running) {
562 snd_nm256_playback_start(chip, s, substream);
563 s->running = 1;
564 }
565 break;
566 case SNDRV_PCM_TRIGGER_SUSPEND:
567 s->suspended = 1;
568 fallthrough;
569 case SNDRV_PCM_TRIGGER_STOP:
570 if (s->running) {
571 snd_nm256_playback_stop(chip);
572 s->running = 0;
573 }
574 break;
575 default:
576 err = -EINVAL;
577 break;
578 }
579 spin_unlock(&chip->reg_lock);
580 return err;
581 }
582
583 static int
584 snd_nm256_capture_trigger(struct snd_pcm_substream *substream, int cmd)
585 {
586 struct nm256 *chip = snd_pcm_substream_chip(substream);
587 struct nm256_stream *s = substream->runtime->private_data;
588 int err = 0;
589
590 if (snd_BUG_ON(!s))
591 return -ENXIO;
592
593 spin_lock(&chip->reg_lock);
594 switch (cmd) {
595 case SNDRV_PCM_TRIGGER_START:
596 case SNDRV_PCM_TRIGGER_RESUME:
597 if (! s->running) {
598 snd_nm256_capture_start(chip, s, substream);
599 s->running = 1;
600 }
601 break;
602 case SNDRV_PCM_TRIGGER_STOP:
603 case SNDRV_PCM_TRIGGER_SUSPEND:
604 if (s->running) {
605 snd_nm256_capture_stop(chip);
606 s->running = 0;
607 }
608 break;
609 default:
610 err = -EINVAL;
611 break;
612 }
613 spin_unlock(&chip->reg_lock);
614 return err;
615 }
616
617
618 /*
619 * prepare playback/capture channel
620 */
621 static int snd_nm256_pcm_prepare(struct snd_pcm_substream *substream)
622 {
623 struct nm256 *chip = snd_pcm_substream_chip(substream);
624 struct snd_pcm_runtime *runtime = substream->runtime;
625 struct nm256_stream *s = runtime->private_data;
626
627 if (snd_BUG_ON(!s))
628 return -ENXIO;
629 s->dma_size = frames_to_bytes(runtime, substream->runtime->buffer_size);
630 s->period_size = frames_to_bytes(runtime, substream->runtime->period_size);
631 s->periods = substream->runtime->periods;
632 s->cur_period = 0;
633
634 spin_lock_irq(&chip->reg_lock);
635 s->running = 0;
636 snd_nm256_set_format(chip, s, substream);
637 spin_unlock_irq(&chip->reg_lock);
638
639 return 0;
640 }
641
642
643 /*
644 * get the current pointer
645 */
646 static snd_pcm_uframes_t
647 snd_nm256_playback_pointer(struct snd_pcm_substream *substream)
648 {
649 struct nm256 *chip = snd_pcm_substream_chip(substream);
650 struct nm256_stream *s = substream->runtime->private_data;
651 unsigned long curp;
652
653 if (snd_BUG_ON(!s))
654 return 0;
655 curp = snd_nm256_readl(chip, NM_PBUFFER_CURRP) - (unsigned long)s->buf;
656 curp %= s->dma_size;
657 return bytes_to_frames(substream->runtime, curp);
658 }
659
660 static snd_pcm_uframes_t
661 snd_nm256_capture_pointer(struct snd_pcm_substream *substream)
662 {
663 struct nm256 *chip = snd_pcm_substream_chip(substream);
664 struct nm256_stream *s = substream->runtime->private_data;
665 unsigned long curp;
666
667 if (snd_BUG_ON(!s))
668 return 0;
669 curp = snd_nm256_readl(chip, NM_RBUFFER_CURRP) - (unsigned long)s->buf;
670 curp %= s->dma_size;
671 return bytes_to_frames(substream->runtime, curp);
672 }
673
674 /* Remapped I/O space can be accessible as pointer on i386 */
675 /* This might be changed in the future */
676 #ifndef __i386__
677 /*
678 * silence / copy for playback
679 */
680 static int
681 snd_nm256_playback_silence(struct snd_pcm_substream *substream,
682 int channel, unsigned long pos, unsigned long count)
683 {
684 struct snd_pcm_runtime *runtime = substream->runtime;
685 struct nm256_stream *s = runtime->private_data;
686
687 memset_io(s->bufptr + pos, 0, count);
688 return 0;
689 }
690
691 static int
692 snd_nm256_playback_copy(struct snd_pcm_substream *substream,
693 int channel, unsigned long pos,
694 struct iov_iter *src, unsigned long count)
695 {
696 struct snd_pcm_runtime *runtime = substream->runtime;
697 struct nm256_stream *s = runtime->private_data;
698
699 return copy_from_iter_toio(s->bufptr + pos, src, count);
700 }
701
702 /*
703 * copy to user
704 */
705 static int
706 snd_nm256_capture_copy(struct snd_pcm_substream *substream,
707 int channel, unsigned long pos,
708 struct iov_iter *dst, unsigned long count)
709 {
710 struct snd_pcm_runtime *runtime = substream->runtime;
711 struct nm256_stream *s = runtime->private_data;
712
713 return copy_to_iter_fromio(dst, s->bufptr + pos, count);
714 }
715
716 #endif /* !__i386__ */
717
718
719 /*
720 * update playback/capture watermarks
721 */
722
723 /* spinlock held! */
724 static void
725 snd_nm256_playback_update(struct nm256 *chip)
726 {
727 struct nm256_stream *s;
728
729 s = &chip->streams[SNDRV_PCM_STREAM_PLAYBACK];
730 if (s->running && s->substream) {
731 spin_unlock(&chip->reg_lock);
732 snd_pcm_period_elapsed(s->substream);
733 spin_lock(&chip->reg_lock);
734 snd_nm256_playback_mark(chip, s);
735 }
736 }
737
738 /* spinlock held! */
739 static void
740 snd_nm256_capture_update(struct nm256 *chip)
741 {
742 struct nm256_stream *s;
743
744 s = &chip->streams[SNDRV_PCM_STREAM_CAPTURE];
745 if (s->running && s->substream) {
746 spin_unlock(&chip->reg_lock);
747 snd_pcm_period_elapsed(s->substream);
748 spin_lock(&chip->reg_lock);
749 snd_nm256_capture_mark(chip, s);
750 }
751 }
752
753 /*
754 * hardware info
755 */
756 static const struct snd_pcm_hardware snd_nm256_playback =
757 {
758 .info = SNDRV_PCM_INFO_MMAP_IOMEM |SNDRV_PCM_INFO_MMAP_VALID |
759 SNDRV_PCM_INFO_INTERLEAVED |
760 /*SNDRV_PCM_INFO_PAUSE |*/
761 SNDRV_PCM_INFO_RESUME,
762 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
763 .rates = SNDRV_PCM_RATE_KNOT/*24k*/ | SNDRV_PCM_RATE_8000_48000,
764 .rate_min = 8000,
765 .rate_max = 48000,
766 .channels_min = 1,
767 .channels_max = 2,
768 .periods_min = 2,
769 .periods_max = 1024,
770 .buffer_bytes_max = 128 * 1024,
771 .period_bytes_min = 256,
772 .period_bytes_max = 128 * 1024,
773 };
774
775 static const struct snd_pcm_hardware snd_nm256_capture =
776 {
777 .info = SNDRV_PCM_INFO_MMAP_IOMEM | SNDRV_PCM_INFO_MMAP_VALID |
778 SNDRV_PCM_INFO_INTERLEAVED |
779 /*SNDRV_PCM_INFO_PAUSE |*/
780 SNDRV_PCM_INFO_RESUME,
781 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
782 .rates = SNDRV_PCM_RATE_KNOT/*24k*/ | SNDRV_PCM_RATE_8000_48000,
783 .rate_min = 8000,
784 .rate_max = 48000,
785 .channels_min = 1,
786 .channels_max = 2,
787 .periods_min = 2,
788 .periods_max = 1024,
789 .buffer_bytes_max = 128 * 1024,
790 .period_bytes_min = 256,
791 .period_bytes_max = 128 * 1024,
792 };
793
794
795 /* set dma transfer size */
796 static int snd_nm256_pcm_hw_params(struct snd_pcm_substream *substream,
797 struct snd_pcm_hw_params *hw_params)
798 {
799 /* area and addr are already set and unchanged */
800 substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
801 return 0;
802 }
803
804 /*
805 * open
806 */
807 static void snd_nm256_setup_stream(struct nm256 *chip, struct nm256_stream *s,
808 struct snd_pcm_substream *substream,
809 const struct snd_pcm_hardware *hw_ptr)
810 {
811 struct snd_pcm_runtime *runtime = substream->runtime;
812
813 s->running = 0;
814 runtime->hw = *hw_ptr;
815 runtime->hw.buffer_bytes_max = s->bufsize;
816 runtime->hw.period_bytes_max = s->bufsize / 2;
817 runtime->dma_area = (void __force *) s->bufptr;
818 runtime->dma_addr = s->bufptr_addr;
819 runtime->dma_bytes = s->bufsize;
820 runtime->private_data = s;
821 s->substream = substream;
822
823 snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
824 &constraints_rates);
825 }
826
827 static int
828 snd_nm256_playback_open(struct snd_pcm_substream *substream)
829 {
830 struct nm256 *chip = snd_pcm_substream_chip(substream);
831
832 if (snd_nm256_acquire_irq(chip) < 0)
833 return -EBUSY;
834 snd_nm256_setup_stream(chip, &chip->streams[SNDRV_PCM_STREAM_PLAYBACK],
835 substream, &snd_nm256_playback);
836 return 0;
837 }
838
839 static int
840 snd_nm256_capture_open(struct snd_pcm_substream *substream)
841 {
842 struct nm256 *chip = snd_pcm_substream_chip(substream);
843
844 if (snd_nm256_acquire_irq(chip) < 0)
845 return -EBUSY;
846 snd_nm256_setup_stream(chip, &chip->streams[SNDRV_PCM_STREAM_CAPTURE],
847 substream, &snd_nm256_capture);
848 return 0;
849 }
850
851 /*
852 * close - we don't have to do special..
853 */
854 static int
855 snd_nm256_playback_close(struct snd_pcm_substream *substream)
856 {
857 struct nm256 *chip = snd_pcm_substream_chip(substream);
858
859 snd_nm256_release_irq(chip);
860 return 0;
861 }
862
863
864 static int
865 snd_nm256_capture_close(struct snd_pcm_substream *substream)
866 {
867 struct nm256 *chip = snd_pcm_substream_chip(substream);
868
869 snd_nm256_release_irq(chip);
870 return 0;
871 }
872
873 /*
874 * create a pcm instance
875 */
876 static const struct snd_pcm_ops snd_nm256_playback_ops = {
877 .open = snd_nm256_playback_open,
878 .close = snd_nm256_playback_close,
879 .hw_params = snd_nm256_pcm_hw_params,
880 .prepare = snd_nm256_pcm_prepare,
881 .trigger = snd_nm256_playback_trigger,
882 .pointer = snd_nm256_playback_pointer,
883 #ifndef __i386__
884 .copy = snd_nm256_playback_copy,
885 .fill_silence = snd_nm256_playback_silence,
886 #endif
887 .mmap = snd_pcm_lib_mmap_iomem,
888 };
889
890 static const struct snd_pcm_ops snd_nm256_capture_ops = {
891 .open = snd_nm256_capture_open,
892 .close = snd_nm256_capture_close,
893 .hw_params = snd_nm256_pcm_hw_params,
894 .prepare = snd_nm256_pcm_prepare,
895 .trigger = snd_nm256_capture_trigger,
896 .pointer = snd_nm256_capture_pointer,
897 #ifndef __i386__
898 .copy = snd_nm256_capture_copy,
899 #endif
900 .mmap = snd_pcm_lib_mmap_iomem,
901 };
902
903 static int
904 snd_nm256_pcm(struct nm256 *chip, int device)
905 {
906 struct snd_pcm *pcm;
907 int i, err;
908
909 for (i = 0; i < 2; i++) {
910 struct nm256_stream *s = &chip->streams[i];
911 s->bufptr = chip->buffer + (s->buf - chip->buffer_start);
912 s->bufptr_addr = chip->buffer_addr + (s->buf - chip->buffer_start);
913 }
914
915 err = snd_pcm_new(chip->card, chip->card->driver, device,
916 1, 1, &pcm);
917 if (err < 0)
918 return err;
919
920 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_nm256_playback_ops);
921 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_nm256_capture_ops);
922
923 pcm->private_data = chip;
924 pcm->info_flags = 0;
925 chip->pcm = pcm;
926
927 return 0;
928 }
929
930
931 /*
932 * Initialize the hardware.
933 */
934 static void
935 snd_nm256_init_chip(struct nm256 *chip)
936 {
937 /* Reset everything. */
938 snd_nm256_writeb(chip, 0x0, 0x11);
939 snd_nm256_writew(chip, 0x214, 0);
940 /* stop sounds.. */
941 //snd_nm256_playback_stop(chip);
942 //snd_nm256_capture_stop(chip);
943 }
944
945
946 static irqreturn_t
947 snd_nm256_intr_check(struct nm256 *chip)
948 {
949 if (chip->badintrcount++ > 1000) {
950 /*
951 * I'm not sure if the best thing is to stop the card from
952 * playing or just release the interrupt (after all, we're in
953 * a bad situation, so doing fancy stuff may not be such a good
954 * idea).
955 *
956 * I worry about the card engine continuing to play noise
957 * over and over, however--that could become a very
958 * obnoxious problem. And we know that when this usually
959 * happens things are fairly safe, it just means the user's
960 * inserted a PCMCIA card and someone's spamming us with IRQ 9s.
961 */
962 if (chip->streams[SNDRV_PCM_STREAM_PLAYBACK].running)
963 snd_nm256_playback_stop(chip);
964 if (chip->streams[SNDRV_PCM_STREAM_CAPTURE].running)
965 snd_nm256_capture_stop(chip);
966 chip->badintrcount = 0;
967 return IRQ_HANDLED;
968 }
969 return IRQ_NONE;
970 }
971
972 /*
973 * Handle a potential interrupt for the device referred to by DEV_ID.
974 *
975 * I don't like the cut-n-paste job here either between the two routines,
976 * but there are sufficient differences between the two interrupt handlers
977 * that parameterizing it isn't all that great either. (Could use a macro,
978 * I suppose...yucky bleah.)
979 */
980
981 static irqreturn_t
982 snd_nm256_interrupt(int irq, void *dev_id)
983 {
984 struct nm256 *chip = dev_id;
985 u16 status;
986 u8 cbyte;
987
988 status = snd_nm256_readw(chip, NM_INT_REG);
989
990 /* Not ours. */
991 if (status == 0)
992 return snd_nm256_intr_check(chip);
993
994 chip->badintrcount = 0;
995
996 /* Rather boring; check for individual interrupts and process them. */
997
998 spin_lock(&chip->reg_lock);
999 if (status & NM_PLAYBACK_INT) {
1000 status &= ~NM_PLAYBACK_INT;
1001 NM_ACK_INT(chip, NM_PLAYBACK_INT);
1002 snd_nm256_playback_update(chip);
1003 }
1004
1005 if (status & NM_RECORD_INT) {
1006 status &= ~NM_RECORD_INT;
1007 NM_ACK_INT(chip, NM_RECORD_INT);
1008 snd_nm256_capture_update(chip);
1009 }
1010
1011 if (status & NM_MISC_INT_1) {
1012 status &= ~NM_MISC_INT_1;
1013 NM_ACK_INT(chip, NM_MISC_INT_1);
1014 dev_dbg(chip->card->dev, "NM256: Got misc interrupt #1\n");
1015 snd_nm256_writew(chip, NM_INT_REG, 0x8000);
1016 cbyte = snd_nm256_readb(chip, 0x400);
1017 snd_nm256_writeb(chip, 0x400, cbyte | 2);
1018 }
1019
1020 if (status & NM_MISC_INT_2) {
1021 status &= ~NM_MISC_INT_2;
1022 NM_ACK_INT(chip, NM_MISC_INT_2);
1023 dev_dbg(chip->card->dev, "NM256: Got misc interrupt #2\n");
1024 cbyte = snd_nm256_readb(chip, 0x400);
1025 snd_nm256_writeb(chip, 0x400, cbyte & ~2);
1026 }
1027
1028 /* Unknown interrupt. */
1029 if (status) {
1030 dev_dbg(chip->card->dev,
1031 "NM256: Fire in the hole! Unknown status 0x%x\n",
1032 status);
1033 /* Pray. */
1034 NM_ACK_INT(chip, status);
1035 }
1036
1037 spin_unlock(&chip->reg_lock);
1038 return IRQ_HANDLED;
1039 }
1040
1041 /*
1042 * Handle a potential interrupt for the device referred to by DEV_ID.
1043 * This handler is for the 256ZX, and is very similar to the non-ZX
1044 * routine.
1045 */
1046
1047 static irqreturn_t
1048 snd_nm256_interrupt_zx(int irq, void *dev_id)
1049 {
1050 struct nm256 *chip = dev_id;
1051 u32 status;
1052 u8 cbyte;
1053
1054 status = snd_nm256_readl(chip, NM_INT_REG);
1055
1056 /* Not ours. */
1057 if (status == 0)
1058 return snd_nm256_intr_check(chip);
1059
1060 chip->badintrcount = 0;
1061
1062 /* Rather boring; check for individual interrupts and process them. */
1063
1064 spin_lock(&chip->reg_lock);
1065 if (status & NM2_PLAYBACK_INT) {
1066 status &= ~NM2_PLAYBACK_INT;
1067 NM2_ACK_INT(chip, NM2_PLAYBACK_INT);
1068 snd_nm256_playback_update(chip);
1069 }
1070
1071 if (status & NM2_RECORD_INT) {
1072 status &= ~NM2_RECORD_INT;
1073 NM2_ACK_INT(chip, NM2_RECORD_INT);
1074 snd_nm256_capture_update(chip);
1075 }
1076
1077 if (status & NM2_MISC_INT_1) {
1078 status &= ~NM2_MISC_INT_1;
1079 NM2_ACK_INT(chip, NM2_MISC_INT_1);
1080 dev_dbg(chip->card->dev, "NM256: Got misc interrupt #1\n");
1081 cbyte = snd_nm256_readb(chip, 0x400);
1082 snd_nm256_writeb(chip, 0x400, cbyte | 2);
1083 }
1084
1085 if (status & NM2_MISC_INT_2) {
1086 status &= ~NM2_MISC_INT_2;
1087 NM2_ACK_INT(chip, NM2_MISC_INT_2);
1088 dev_dbg(chip->card->dev, "NM256: Got misc interrupt #2\n");
1089 cbyte = snd_nm256_readb(chip, 0x400);
1090 snd_nm256_writeb(chip, 0x400, cbyte & ~2);
1091 }
1092
1093 /* Unknown interrupt. */
1094 if (status) {
1095 dev_dbg(chip->card->dev,
1096 "NM256: Fire in the hole! Unknown status 0x%x\n",
1097 status);
1098 /* Pray. */
1099 NM2_ACK_INT(chip, status);
1100 }
1101
1102 spin_unlock(&chip->reg_lock);
1103 return IRQ_HANDLED;
1104 }
1105
1106 /*
1107 * AC97 interface
1108 */
1109
1110 /*
1111 * Waits for the mixer to become ready to be written; returns a zero value
1112 * if it timed out.
1113 */
1114 static int
1115 snd_nm256_ac97_ready(struct nm256 *chip)
1116 {
1117 int timeout = 10;
1118 u32 testaddr;
1119 u16 testb;
1120
1121 testaddr = chip->mixer_status_offset;
1122 testb = chip->mixer_status_mask;
1123
1124 /*
1125 * Loop around waiting for the mixer to become ready.
1126 */
1127 while (timeout-- > 0) {
1128 if ((snd_nm256_readw(chip, testaddr) & testb) == 0)
1129 return 1;
1130 udelay(100);
1131 }
1132 return 0;
1133 }
1134
1135 /*
1136 * Initial register values to be written to the AC97 mixer.
1137 * While most of these are identical to the reset values, we do this
1138 * so that we have most of the register contents cached--this avoids
1139 * reading from the mixer directly (which seems to be problematic,
1140 * probably due to ignorance).
1141 */
1142
1143 struct initialValues {
1144 unsigned short reg;
1145 unsigned short value;
1146 };
1147
1148 static const struct initialValues nm256_ac97_init_val[] =
1149 {
1150 { AC97_MASTER, 0x8000 },
1151 { AC97_HEADPHONE, 0x8000 },
1152 { AC97_MASTER_MONO, 0x8000 },
1153 { AC97_PC_BEEP, 0x8000 },
1154 { AC97_PHONE, 0x8008 },
1155 { AC97_MIC, 0x8000 },
1156 { AC97_LINE, 0x8808 },
1157 { AC97_CD, 0x8808 },
1158 { AC97_VIDEO, 0x8808 },
1159 { AC97_AUX, 0x8808 },
1160 { AC97_PCM, 0x8808 },
1161 { AC97_REC_SEL, 0x0000 },
1162 { AC97_REC_GAIN, 0x0B0B },
1163 { AC97_GENERAL_PURPOSE, 0x0000 },
1164 { AC97_3D_CONTROL, 0x8000 },
1165 { AC97_VENDOR_ID1, 0x8384 },
1166 { AC97_VENDOR_ID2, 0x7609 },
1167 };
1168
1169 static int nm256_ac97_idx(unsigned short reg)
1170 {
1171 int i;
1172 for (i = 0; i < ARRAY_SIZE(nm256_ac97_init_val); i++)
1173 if (nm256_ac97_init_val[i].reg == reg)
1174 return i;
1175 return -1;
1176 }
1177
1178 /*
1179 * some nm256 easily crash when reading from mixer registers
1180 * thus we're treating it as a write-only mixer and cache the
1181 * written values
1182 */
1183 static unsigned short
1184 snd_nm256_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
1185 {
1186 struct nm256 *chip = ac97->private_data;
1187 int idx = nm256_ac97_idx(reg);
1188
1189 if (idx < 0)
1190 return 0;
1191 return chip->ac97_regs[idx];
1192 }
1193
1194 /*
1195 */
1196 static void
1197 snd_nm256_ac97_write(struct snd_ac97 *ac97,
1198 unsigned short reg, unsigned short val)
1199 {
1200 struct nm256 *chip = ac97->private_data;
1201 int tries = 2;
1202 int idx = nm256_ac97_idx(reg);
1203 u32 base;
1204
1205 if (idx < 0)
1206 return;
1207
1208 base = chip->mixer_base;
1209
1210 snd_nm256_ac97_ready(chip);
1211
1212 /* Wait for the write to take, too. */
1213 while (tries-- > 0) {
1214 snd_nm256_writew(chip, base + reg, val);
1215 msleep(1); /* a little delay here seems better.. */
1216 if (snd_nm256_ac97_ready(chip)) {
1217 /* successful write: set cache */
1218 chip->ac97_regs[idx] = val;
1219 return;
1220 }
1221 }
1222 dev_dbg(chip->card->dev, "nm256: ac97 codec not ready..\n");
1223 }
1224
1225 /* static resolution table */
1226 static const struct snd_ac97_res_table nm256_res_table[] = {
1227 { AC97_MASTER, 0x1f1f },
1228 { AC97_HEADPHONE, 0x1f1f },
1229 { AC97_MASTER_MONO, 0x001f },
1230 { AC97_PC_BEEP, 0x001f },
1231 { AC97_PHONE, 0x001f },
1232 { AC97_MIC, 0x001f },
1233 { AC97_LINE, 0x1f1f },
1234 { AC97_CD, 0x1f1f },
1235 { AC97_VIDEO, 0x1f1f },
1236 { AC97_AUX, 0x1f1f },
1237 { AC97_PCM, 0x1f1f },
1238 { AC97_REC_GAIN, 0x0f0f },
1239 { } /* terminator */
1240 };
1241
1242 /* initialize the ac97 into a known state */
1243 static void
1244 snd_nm256_ac97_reset(struct snd_ac97 *ac97)
1245 {
1246 struct nm256 *chip = ac97->private_data;
1247
1248 /* Reset the mixer. 'Tis magic! */
1249 snd_nm256_writeb(chip, 0x6c0, 1);
1250 if (! chip->reset_workaround) {
1251 /* Dell latitude LS will lock up by this */
1252 snd_nm256_writeb(chip, 0x6cc, 0x87);
1253 }
1254 if (! chip->reset_workaround_2) {
1255 /* Dell latitude CSx will lock up by this */
1256 snd_nm256_writeb(chip, 0x6cc, 0x80);
1257 snd_nm256_writeb(chip, 0x6cc, 0x0);
1258 }
1259 if (! chip->in_resume) {
1260 int i;
1261 for (i = 0; i < ARRAY_SIZE(nm256_ac97_init_val); i++) {
1262 /* preload the cache, so as to avoid even a single
1263 * read of the mixer regs
1264 */
1265 snd_nm256_ac97_write(ac97, nm256_ac97_init_val[i].reg,
1266 nm256_ac97_init_val[i].value);
1267 }
1268 }
1269 }
1270
1271 /* create an ac97 mixer interface */
1272 static int
1273 snd_nm256_mixer(struct nm256 *chip)
1274 {
1275 struct snd_ac97_bus *pbus;
1276 struct snd_ac97_template ac97;
1277 int err;
1278 static const struct snd_ac97_bus_ops ops = {
1279 .reset = snd_nm256_ac97_reset,
1280 .write = snd_nm256_ac97_write,
1281 .read = snd_nm256_ac97_read,
1282 };
1283
1284 chip->ac97_regs = devm_kcalloc(chip->card->dev,
1285 ARRAY_SIZE(nm256_ac97_init_val),
1286 sizeof(short), GFP_KERNEL);
1287 if (! chip->ac97_regs)
1288 return -ENOMEM;
1289
1290 err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus);
1291 if (err < 0)
1292 return err;
1293
1294 memset(&ac97, 0, sizeof(ac97));
1295 ac97.scaps = AC97_SCAP_AUDIO; /* we support audio! */
1296 ac97.private_data = chip;
1297 ac97.res_table = nm256_res_table;
1298 pbus->no_vra = 1;
1299 err = snd_ac97_mixer(pbus, &ac97, &chip->ac97);
1300 if (err < 0)
1301 return err;
1302 if (! (chip->ac97->id & (0xf0000000))) {
1303 /* looks like an invalid id */
1304 sprintf(chip->card->mixername, "%s AC97", chip->card->driver);
1305 }
1306 return 0;
1307 }
1308
1309 /*
1310 * See if the signature left by the NM256 BIOS is intact; if so, we use
1311 * the associated address as the end of our audio buffer in the video
1312 * RAM.
1313 */
1314
1315 static int
1316 snd_nm256_peek_for_sig(struct nm256 *chip)
1317 {
1318 /* The signature is located 1K below the end of video RAM. */
1319 void __iomem *temp;
1320 /* Default buffer end is 5120 bytes below the top of RAM. */
1321 unsigned long pointer_found = chip->buffer_end - 0x1400;
1322 u32 sig;
1323
1324 temp = ioremap(chip->buffer_addr + chip->buffer_end - 0x400, 16);
1325 if (temp == NULL) {
1326 dev_err(chip->card->dev,
1327 "Unable to scan for card signature in video RAM\n");
1328 return -EBUSY;
1329 }
1330
1331 sig = readl(temp);
1332 if ((sig & NM_SIG_MASK) == NM_SIGNATURE) {
1333 u32 pointer = readl(temp + 4);
1334
1335 /*
1336 * If it's obviously invalid, don't use it
1337 */
1338 if (pointer == 0xffffffff ||
1339 pointer < chip->buffer_size ||
1340 pointer > chip->buffer_end) {
1341 dev_err(chip->card->dev,
1342 "invalid signature found: 0x%x\n", pointer);
1343 iounmap(temp);
1344 return -ENODEV;
1345 } else {
1346 pointer_found = pointer;
1347 dev_info(chip->card->dev,
1348 "found card signature in video RAM: 0x%x\n",
1349 pointer);
1350 }
1351 }
1352
1353 iounmap(temp);
1354 chip->buffer_end = pointer_found;
1355
1356 return 0;
1357 }
1358
1359 /*
1360 * APM event handler, so the card is properly reinitialized after a power
1361 * event.
1362 */
1363 static int nm256_suspend(struct device *dev)
1364 {
1365 struct snd_card *card = dev_get_drvdata(dev);
1366 struct nm256 *chip = card->private_data;
1367
1368 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1369 snd_ac97_suspend(chip->ac97);
1370 chip->coeffs_current = 0;
1371 return 0;
1372 }
1373
1374 static int nm256_resume(struct device *dev)
1375 {
1376 struct snd_card *card = dev_get_drvdata(dev);
1377 struct nm256 *chip = card->private_data;
1378 int i;
1379
1380 /* Perform a full reset on the hardware */
1381 chip->in_resume = 1;
1382
1383 snd_nm256_init_chip(chip);
1384
1385 /* restore ac97 */
1386 snd_ac97_resume(chip->ac97);
1387
1388 for (i = 0; i < 2; i++) {
1389 struct nm256_stream *s = &chip->streams[i];
1390 if (s->substream && s->suspended) {
1391 spin_lock_irq(&chip->reg_lock);
1392 snd_nm256_set_format(chip, s, s->substream);
1393 spin_unlock_irq(&chip->reg_lock);
1394 }
1395 }
1396
1397 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1398 chip->in_resume = 0;
1399 return 0;
1400 }
1401
1402 static DEFINE_SIMPLE_DEV_PM_OPS(nm256_pm, nm256_suspend, nm256_resume);
1403
1404 static void snd_nm256_free(struct snd_card *card)
1405 {
1406 struct nm256 *chip = card->private_data;
1407
1408 if (chip->streams[SNDRV_PCM_STREAM_PLAYBACK].running)
1409 snd_nm256_playback_stop(chip);
1410 if (chip->streams[SNDRV_PCM_STREAM_CAPTURE].running)
1411 snd_nm256_capture_stop(chip);
1412 }
1413
1414 static int
1415 snd_nm256_create(struct snd_card *card, struct pci_dev *pci)
1416 {
1417 struct nm256 *chip = card->private_data;
1418 int err, pval;
1419 u32 addr;
1420
1421 err = pcim_enable_device(pci);
1422 if (err < 0)
1423 return err;
1424
1425 chip->card = card;
1426 chip->pci = pci;
1427 chip->use_cache = use_cache;
1428 spin_lock_init(&chip->reg_lock);
1429 chip->irq = -1;
1430 mutex_init(&chip->irq_mutex);
1431
1432 /* store buffer sizes in bytes */
1433 chip->streams[SNDRV_PCM_STREAM_PLAYBACK].bufsize = playback_bufsize * 1024;
1434 chip->streams[SNDRV_PCM_STREAM_CAPTURE].bufsize = capture_bufsize * 1024;
1435
1436 /*
1437 * The NM256 has two memory ports. The first port is nothing
1438 * more than a chunk of video RAM, which is used as the I/O ring
1439 * buffer. The second port has the actual juicy stuff (like the
1440 * mixer and the playback engine control registers).
1441 */
1442
1443 chip->buffer_addr = pci_resource_start(pci, 0);
1444 chip->cport_addr = pci_resource_start(pci, 1);
1445
1446 err = pci_request_regions(pci, card->driver);
1447 if (err < 0)
1448 return err;
1449
1450 /* Init the memory port info. */
1451 /* remap control port (#2) */
1452 chip->cport = devm_ioremap(&pci->dev, chip->cport_addr, NM_PORT2_SIZE);
1453 if (!chip->cport) {
1454 dev_err(card->dev, "unable to map control port %lx\n",
1455 chip->cport_addr);
1456 return -ENOMEM;
1457 }
1458
1459 if (!strcmp(card->driver, "NM256AV")) {
1460 /* Ok, try to see if this is a non-AC97 version of the hardware. */
1461 pval = snd_nm256_readw(chip, NM_MIXER_PRESENCE);
1462 if ((pval & NM_PRESENCE_MASK) != NM_PRESENCE_VALUE) {
1463 if (! force_ac97) {
1464 dev_err(card->dev,
1465 "no ac97 is found!\n");
1466 dev_err(card->dev,
1467 "force the driver to load by passing in the module parameter\n");
1468 dev_err(card->dev,
1469 " force_ac97=1\n");
1470 dev_err(card->dev,
1471 "or try sb16, opl3sa2, or cs423x drivers instead.\n");
1472 return -ENXIO;
1473 }
1474 }
1475 chip->buffer_end = 2560 * 1024;
1476 chip->interrupt = snd_nm256_interrupt;
1477 chip->mixer_status_offset = NM_MIXER_STATUS_OFFSET;
1478 chip->mixer_status_mask = NM_MIXER_READY_MASK;
1479 } else {
1480 /* Not sure if there is any relevant detect for the ZX or not. */
1481 if (snd_nm256_readb(chip, 0xa0b) != 0)
1482 chip->buffer_end = 6144 * 1024;
1483 else
1484 chip->buffer_end = 4096 * 1024;
1485
1486 chip->interrupt = snd_nm256_interrupt_zx;
1487 chip->mixer_status_offset = NM2_MIXER_STATUS_OFFSET;
1488 chip->mixer_status_mask = NM2_MIXER_READY_MASK;
1489 }
1490
1491 chip->buffer_size = chip->streams[SNDRV_PCM_STREAM_PLAYBACK].bufsize +
1492 chip->streams[SNDRV_PCM_STREAM_CAPTURE].bufsize;
1493 if (chip->use_cache)
1494 chip->buffer_size += NM_TOTAL_COEFF_COUNT * 4;
1495 else
1496 chip->buffer_size += NM_MAX_PLAYBACK_COEF_SIZE + NM_MAX_RECORD_COEF_SIZE;
1497
1498 if (buffer_top >= chip->buffer_size && buffer_top < chip->buffer_end)
1499 chip->buffer_end = buffer_top;
1500 else {
1501 /* get buffer end pointer from signature */
1502 err = snd_nm256_peek_for_sig(chip);
1503 if (err < 0)
1504 return err;
1505 }
1506
1507 chip->buffer_start = chip->buffer_end - chip->buffer_size;
1508 chip->buffer_addr += chip->buffer_start;
1509
1510 dev_info(card->dev, "Mapping port 1 from 0x%x - 0x%x\n",
1511 chip->buffer_start, chip->buffer_end);
1512
1513 chip->buffer = devm_ioremap(&pci->dev, chip->buffer_addr,
1514 chip->buffer_size);
1515 if (!chip->buffer) {
1516 dev_err(card->dev, "unable to map ring buffer at %lx\n",
1517 chip->buffer_addr);
1518 return -ENOMEM;
1519 }
1520
1521 /* set offsets */
1522 addr = chip->buffer_start;
1523 chip->streams[SNDRV_PCM_STREAM_PLAYBACK].buf = addr;
1524 addr += chip->streams[SNDRV_PCM_STREAM_PLAYBACK].bufsize;
1525 chip->streams[SNDRV_PCM_STREAM_CAPTURE].buf = addr;
1526 addr += chip->streams[SNDRV_PCM_STREAM_CAPTURE].bufsize;
1527 if (chip->use_cache) {
1528 chip->all_coeff_buf = addr;
1529 } else {
1530 chip->coeff_buf[SNDRV_PCM_STREAM_PLAYBACK] = addr;
1531 addr += NM_MAX_PLAYBACK_COEF_SIZE;
1532 chip->coeff_buf[SNDRV_PCM_STREAM_CAPTURE] = addr;
1533 }
1534
1535 /* Fixed setting. */
1536 chip->mixer_base = NM_MIXER_OFFSET;
1537
1538 chip->coeffs_current = 0;
1539
1540 snd_nm256_init_chip(chip);
1541
1542 // pci_set_master(pci); /* needed? */
1543 return 0;
1544 }
1545
1546
1547 enum { NM_IGNORED, NM_RESET_WORKAROUND, NM_RESET_WORKAROUND_2 };
1548
1549 static const struct snd_pci_quirk nm256_quirks[] = {
1550 /* HP omnibook 4150 has cs4232 codec internally */
1551 SND_PCI_QUIRK(0x103c, 0x0007, "HP omnibook 4150", NM_IGNORED),
1552 /* Reset workarounds to avoid lock-ups */
1553 SND_PCI_QUIRK(0x104d, 0x8041, "Sony PCG-F305", NM_RESET_WORKAROUND),
1554 SND_PCI_QUIRK(0x1028, 0x0080, "Dell Latitude LS", NM_RESET_WORKAROUND),
1555 SND_PCI_QUIRK(0x1028, 0x0091, "Dell Latitude CSx", NM_RESET_WORKAROUND_2),
1556 { } /* terminator */
1557 };
1558
1559
1560 static int snd_nm256_probe(struct pci_dev *pci,
1561 const struct pci_device_id *pci_id)
1562 {
1563 struct snd_card *card;
1564 struct nm256 *chip;
1565 int err;
1566 const struct snd_pci_quirk *q;
1567
1568 q = snd_pci_quirk_lookup(pci, nm256_quirks);
1569 if (q) {
1570 dev_dbg(&pci->dev, "Enabled quirk for %s.\n",
1571 snd_pci_quirk_name(q));
1572 switch (q->value) {
1573 case NM_IGNORED:
1574 dev_info(&pci->dev,
1575 "The device is on the denylist. Loading stopped\n");
1576 return -ENODEV;
1577 case NM_RESET_WORKAROUND_2:
1578 reset_workaround_2 = 1;
1579 fallthrough;
1580 case NM_RESET_WORKAROUND:
1581 reset_workaround = 1;
1582 break;
1583 }
1584 }
1585
1586 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
1587 sizeof(*chip), &card);
1588 if (err < 0)
1589 return err;
1590 chip = card->private_data;
1591
1592 switch (pci->device) {
1593 case PCI_DEVICE_ID_NEOMAGIC_NM256AV_AUDIO:
1594 strcpy(card->driver, "NM256AV");
1595 break;
1596 case PCI_DEVICE_ID_NEOMAGIC_NM256ZX_AUDIO:
1597 strcpy(card->driver, "NM256ZX");
1598 break;
1599 case PCI_DEVICE_ID_NEOMAGIC_NM256XL_PLUS_AUDIO:
1600 strcpy(card->driver, "NM256XL+");
1601 break;
1602 default:
1603 dev_err(&pci->dev, "invalid device id 0x%x\n", pci->device);
1604 return -EINVAL;
1605 }
1606
1607 if (vaio_hack)
1608 buffer_top = 0x25a800; /* this avoids conflicts with XFree86 server */
1609
1610 if (playback_bufsize < 4)
1611 playback_bufsize = 4;
1612 if (playback_bufsize > 128)
1613 playback_bufsize = 128;
1614 if (capture_bufsize < 4)
1615 capture_bufsize = 4;
1616 if (capture_bufsize > 128)
1617 capture_bufsize = 128;
1618 err = snd_nm256_create(card, pci);
1619 if (err < 0)
1620 return err;
1621
1622 if (reset_workaround) {
1623 dev_dbg(&pci->dev, "reset_workaround activated\n");
1624 chip->reset_workaround = 1;
1625 }
1626
1627 if (reset_workaround_2) {
1628 dev_dbg(&pci->dev, "reset_workaround_2 activated\n");
1629 chip->reset_workaround_2 = 1;
1630 }
1631
1632 err = snd_nm256_pcm(chip, 0);
1633 if (err < 0)
1634 return err;
1635 err = snd_nm256_mixer(chip);
1636 if (err < 0)
1637 return err;
1638
1639 sprintf(card->shortname, "NeoMagic %s", card->driver);
1640 sprintf(card->longname, "%s at 0x%lx & 0x%lx, irq %d",
1641 card->shortname,
1642 chip->buffer_addr, chip->cport_addr, chip->irq);
1643
1644 err = snd_card_register(card);
1645 if (err < 0)
1646 return err;
1647 card->private_free = snd_nm256_free;
1648
1649 pci_set_drvdata(pci, card);
1650 return 0;
1651 }
1652
1653 static struct pci_driver nm256_driver = {
1654 .name = KBUILD_MODNAME,
1655 .id_table = snd_nm256_ids,
1656 .probe = snd_nm256_probe,
1657 .driver = {
1658 .pm = &nm256_pm,
1659 },
1660 };
1661
1662 module_pci_driver(nm256_driver);
1663
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