1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Support for audio capture
4 * PCI function #1 of the cx2388x.
5 *
6 * (c) 2007 Trent Piepho <xyzzy@speakeasy.org>
7 * (c) 2005,2006 Ricardo Cerqueira <v4l@cerqueira.org>
8 * (c) 2005 Mauro Carvalho Chehab <mchehab@kernel.org>
9 * Based on a dummy cx88 module by Gerd Knorr <kraxel@bytesex.org>
10 * Based on dummy.c by Jaroslav Kysela <perex@perex.cz>
11 */
12
13 #include "cx88.h"
14 #include "cx88-reg.h"
15
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/device.h>
20 #include <linux/interrupt.h>
21 #include <linux/vmalloc.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/pci.h>
24 #include <linux/slab.h>
25
26 #include <sound/core.h>
27 #include <sound/pcm.h>
28 #include <sound/pcm_params.h>
29 #include <sound/control.h>
30 #include <sound/initval.h>
31 #include <sound/tlv.h>
32 #include <media/i2c/wm8775.h>
33
34 #define dprintk(level, fmt, arg...) do { \
35 if (debug + 1 > level) \
36 printk(KERN_DEBUG pr_fmt("%s: alsa: " fmt), \
37 chip->core->name, ##arg); \
38 } while (0)
39
40 /*
41 * Data type declarations - Can be moded to a header file later
42 */
43
44 struct cx88_audio_buffer {
45 unsigned int bpl;
46 struct cx88_riscmem risc;
47 void *vaddr;
48 struct scatterlist *sglist;
49 int sglen;
50 unsigned long nr_pages;
51 };
52
53 struct cx88_audio_dev {
54 struct cx88_core *core;
55 struct cx88_dmaqueue q;
56
57 /* pci i/o */
58 struct pci_dev *pci;
59
60 /* audio controls */
61 int irq;
62
63 struct snd_card *card;
64
65 spinlock_t reg_lock;
66 atomic_t count;
67
68 unsigned int dma_size;
69 unsigned int period_size;
70 unsigned int num_periods;
71
72 struct cx88_audio_buffer *buf;
73
74 struct snd_pcm_substream *substream;
75 };
76
77 /*
78 * Module global static vars
79 */
80
81 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
82 static const char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
83 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
84
85 module_param_array(enable, bool, NULL, 0444);
86 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
87
88 module_param_array(index, int, NULL, 0444);
89 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
90
91 /*
92 * Module macros
93 */
94
95 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
96 MODULE_AUTHOR("Ricardo Cerqueira");
97 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
98 MODULE_LICENSE("GPL v2");
99 MODULE_VERSION(CX88_VERSION);
100
101 static unsigned int debug;
102 module_param(debug, int, 0644);
103 MODULE_PARM_DESC(debug, "enable debug messages");
104
105 /*
106 * Module specific functions
107 */
108
109 /*
110 * BOARD Specific: Sets audio DMA
111 */
112
_cx88_start_audio_dma(struct cx88_audio_dev * chip)113 static int _cx88_start_audio_dma(struct cx88_audio_dev *chip)
114 {
115 struct cx88_audio_buffer *buf = chip->buf;
116 struct cx88_core *core = chip->core;
117 const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
118
119 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
120 cx_clear(MO_AUD_DMACNTRL, 0x11);
121
122 /* setup fifo + format - out channel */
123 cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
124
125 /* sets bpl size */
126 cx_write(MO_AUDD_LNGTH, buf->bpl);
127
128 /* reset counter */
129 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
130 atomic_set(&chip->count, 0);
131
132 dprintk(1,
133 "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d byte buffer\n",
134 buf->bpl, cx_read(audio_ch->cmds_start + 8) >> 1,
135 chip->num_periods, buf->bpl * chip->num_periods);
136
137 /* Enables corresponding bits at AUD_INT_STAT */
138 cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
139 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
140
141 /* Clean any pending interrupt bits already set */
142 cx_write(MO_AUD_INTSTAT, ~0);
143
144 /* enable audio irqs */
145 cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
146
147 /* start dma */
148
149 /* Enables Risc Processor */
150 cx_set(MO_DEV_CNTRL2, (1 << 5));
151 /* audio downstream FIFO and RISC enable */
152 cx_set(MO_AUD_DMACNTRL, 0x11);
153
154 if (debug)
155 cx88_sram_channel_dump(chip->core, audio_ch);
156
157 return 0;
158 }
159
160 /*
161 * BOARD Specific: Resets audio DMA
162 */
_cx88_stop_audio_dma(struct cx88_audio_dev * chip)163 static int _cx88_stop_audio_dma(struct cx88_audio_dev *chip)
164 {
165 struct cx88_core *core = chip->core;
166
167 dprintk(1, "Stopping audio DMA\n");
168
169 /* stop dma */
170 cx_clear(MO_AUD_DMACNTRL, 0x11);
171
172 /* disable irqs */
173 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
174 cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
175 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
176
177 if (debug)
178 cx88_sram_channel_dump(chip->core,
179 &cx88_sram_channels[SRAM_CH25]);
180
181 return 0;
182 }
183
184 #define MAX_IRQ_LOOP 50
185
186 /*
187 * BOARD Specific: IRQ dma bits
188 */
189 static const char *cx88_aud_irqs[32] = {
190 "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
191 NULL, /* reserved */
192 "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
193 NULL, /* reserved */
194 "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */
195 NULL, /* reserved */
196 "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */
197 NULL, /* reserved */
198 "opc_err", "par_err", "rip_err", /* 16-18 */
199 "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */
200 };
201
202 /*
203 * BOARD Specific: Threats IRQ audio specific calls
204 */
cx8801_aud_irq(struct cx88_audio_dev * chip)205 static void cx8801_aud_irq(struct cx88_audio_dev *chip)
206 {
207 struct cx88_core *core = chip->core;
208 u32 status, mask;
209
210 status = cx_read(MO_AUD_INTSTAT);
211 mask = cx_read(MO_AUD_INTMSK);
212 if (0 == (status & mask))
213 return;
214 cx_write(MO_AUD_INTSTAT, status);
215 if (debug > 1 || (status & mask & ~0xff))
216 cx88_print_irqbits("irq aud",
217 cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
218 status, mask);
219 /* risc op code error */
220 if (status & AUD_INT_OPC_ERR) {
221 pr_warn("Audio risc op code error\n");
222 cx_clear(MO_AUD_DMACNTRL, 0x11);
223 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
224 }
225 if (status & AUD_INT_DN_SYNC) {
226 dprintk(1, "Downstream sync error\n");
227 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
228 return;
229 }
230 /* risc1 downstream */
231 if (status & AUD_INT_DN_RISCI1) {
232 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
233 snd_pcm_period_elapsed(chip->substream);
234 }
235 /* FIXME: Any other status should deserve a special handling? */
236 }
237
238 /*
239 * BOARD Specific: Handles IRQ calls
240 */
cx8801_irq(int irq,void * dev_id)241 static irqreturn_t cx8801_irq(int irq, void *dev_id)
242 {
243 struct cx88_audio_dev *chip = dev_id;
244 struct cx88_core *core = chip->core;
245 u32 status;
246 int loop, handled = 0;
247
248 for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
249 status = cx_read(MO_PCI_INTSTAT) &
250 (core->pci_irqmask | PCI_INT_AUDINT);
251 if (status == 0)
252 goto out;
253 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
254 loop, MAX_IRQ_LOOP, status);
255 handled = 1;
256 cx_write(MO_PCI_INTSTAT, status);
257
258 if (status & core->pci_irqmask)
259 cx88_core_irq(core, status);
260 if (status & PCI_INT_AUDINT)
261 cx8801_aud_irq(chip);
262 }
263
264 if (loop == MAX_IRQ_LOOP) {
265 pr_err("IRQ loop detected, disabling interrupts\n");
266 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
267 }
268
269 out:
270 return IRQ_RETVAL(handled);
271 }
272
cx88_alsa_dma_init(struct cx88_audio_dev * chip,unsigned long nr_pages)273 static int cx88_alsa_dma_init(struct cx88_audio_dev *chip,
274 unsigned long nr_pages)
275 {
276 struct cx88_audio_buffer *buf = chip->buf;
277 struct page *pg;
278 int i;
279
280 buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
281 if (!buf->vaddr) {
282 dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages);
283 return -ENOMEM;
284 }
285
286 dprintk(1, "vmalloc is at addr %p, size=%lu\n",
287 buf->vaddr, nr_pages << PAGE_SHIFT);
288
289 memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
290 buf->nr_pages = nr_pages;
291
292 buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages));
293 if (!buf->sglist)
294 goto vzalloc_err;
295
296 sg_init_table(buf->sglist, buf->nr_pages);
297 for (i = 0; i < buf->nr_pages; i++) {
298 pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
299 if (!pg)
300 goto vmalloc_to_page_err;
301 sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
302 }
303 return 0;
304
305 vmalloc_to_page_err:
306 vfree(buf->sglist);
307 buf->sglist = NULL;
308 vzalloc_err:
309 vfree(buf->vaddr);
310 buf->vaddr = NULL;
311 return -ENOMEM;
312 }
313
cx88_alsa_dma_map(struct cx88_audio_dev * dev)314 static int cx88_alsa_dma_map(struct cx88_audio_dev *dev)
315 {
316 struct cx88_audio_buffer *buf = dev->buf;
317
318 buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
319 buf->nr_pages, DMA_FROM_DEVICE);
320
321 if (buf->sglen == 0) {
322 pr_warn("%s: cx88_alsa_map_sg failed\n", __func__);
323 return -ENOMEM;
324 }
325 return 0;
326 }
327
cx88_alsa_dma_unmap(struct cx88_audio_dev * dev)328 static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev)
329 {
330 struct cx88_audio_buffer *buf = dev->buf;
331
332 if (!buf->sglen)
333 return 0;
334
335 dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages,
336 DMA_FROM_DEVICE);
337 buf->sglen = 0;
338 return 0;
339 }
340
cx88_alsa_dma_free(struct cx88_audio_buffer * buf)341 static int cx88_alsa_dma_free(struct cx88_audio_buffer *buf)
342 {
343 vfree(buf->sglist);
344 buf->sglist = NULL;
345 vfree(buf->vaddr);
346 buf->vaddr = NULL;
347 return 0;
348 }
349
dsp_buffer_free(struct cx88_audio_dev * chip)350 static int dsp_buffer_free(struct cx88_audio_dev *chip)
351 {
352 struct cx88_riscmem *risc = &chip->buf->risc;
353
354 WARN_ON(!chip->dma_size);
355
356 dprintk(2, "Freeing buffer\n");
357 cx88_alsa_dma_unmap(chip);
358 cx88_alsa_dma_free(chip->buf);
359 if (risc->cpu)
360 dma_free_coherent(&chip->pci->dev, risc->size, risc->cpu,
361 risc->dma);
362 kfree(chip->buf);
363
364 chip->buf = NULL;
365
366 return 0;
367 }
368
369 /*
370 * ALSA PCM Interface
371 */
372
373 /*
374 * Digital hardware definition
375 */
376 #define DEFAULT_FIFO_SIZE 4096
377 static const struct snd_pcm_hardware snd_cx88_digital_hw = {
378 .info = SNDRV_PCM_INFO_MMAP |
379 SNDRV_PCM_INFO_INTERLEAVED |
380 SNDRV_PCM_INFO_BLOCK_TRANSFER |
381 SNDRV_PCM_INFO_MMAP_VALID,
382 .formats = SNDRV_PCM_FMTBIT_S16_LE,
383
384 .rates = SNDRV_PCM_RATE_48000,
385 .rate_min = 48000,
386 .rate_max = 48000,
387 .channels_min = 2,
388 .channels_max = 2,
389 /*
390 * Analog audio output will be full of clicks and pops if there
391 * are not exactly four lines in the SRAM FIFO buffer.
392 */
393 .period_bytes_min = DEFAULT_FIFO_SIZE / 4,
394 .period_bytes_max = DEFAULT_FIFO_SIZE / 4,
395 .periods_min = 1,
396 .periods_max = 1024,
397 .buffer_bytes_max = (1024 * 1024),
398 };
399
400 /*
401 * audio pcm capture open callback
402 */
snd_cx88_pcm_open(struct snd_pcm_substream * substream)403 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
404 {
405 struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
406 struct snd_pcm_runtime *runtime = substream->runtime;
407 int err;
408
409 if (!chip) {
410 pr_err("BUG: cx88 can't find device struct. Can't proceed with open\n");
411 return -ENODEV;
412 }
413
414 err = snd_pcm_hw_constraint_pow2(runtime, 0,
415 SNDRV_PCM_HW_PARAM_PERIODS);
416 if (err < 0)
417 goto _error;
418
419 chip->substream = substream;
420
421 runtime->hw = snd_cx88_digital_hw;
422
423 if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
424 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
425
426 bpl &= ~7; /* must be multiple of 8 */
427 runtime->hw.period_bytes_min = bpl;
428 runtime->hw.period_bytes_max = bpl;
429 }
430
431 return 0;
432 _error:
433 dprintk(1, "Error opening PCM!\n");
434 return err;
435 }
436
437 /*
438 * audio close callback
439 */
snd_cx88_close(struct snd_pcm_substream * substream)440 static int snd_cx88_close(struct snd_pcm_substream *substream)
441 {
442 return 0;
443 }
444
445 /*
446 * hw_params callback
447 */
snd_cx88_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)448 static int snd_cx88_hw_params(struct snd_pcm_substream *substream,
449 struct snd_pcm_hw_params *hw_params)
450 {
451 struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
452
453 struct cx88_audio_buffer *buf;
454 int ret;
455
456 if (substream->runtime->dma_area) {
457 dsp_buffer_free(chip);
458 substream->runtime->dma_area = NULL;
459 }
460
461 chip->period_size = params_period_bytes(hw_params);
462 chip->num_periods = params_periods(hw_params);
463 chip->dma_size = chip->period_size * params_periods(hw_params);
464
465 WARN_ON(!chip->dma_size);
466 WARN_ON(chip->num_periods & (chip->num_periods - 1));
467
468 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
469 if (!buf)
470 return -ENOMEM;
471
472 chip->buf = buf;
473 buf->bpl = chip->period_size;
474
475 ret = cx88_alsa_dma_init(chip,
476 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
477 if (ret < 0)
478 goto error;
479
480 ret = cx88_alsa_dma_map(chip);
481 if (ret < 0)
482 goto error;
483
484 ret = cx88_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
485 chip->period_size, chip->num_periods, 1);
486 if (ret < 0)
487 goto error;
488
489 /* Loop back to start of program */
490 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
491 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
492
493 substream->runtime->dma_area = chip->buf->vaddr;
494 substream->runtime->dma_bytes = chip->dma_size;
495 substream->runtime->dma_addr = 0;
496 return 0;
497
498 error:
499 kfree(buf);
500 return ret;
501 }
502
503 /*
504 * hw free callback
505 */
snd_cx88_hw_free(struct snd_pcm_substream * substream)506 static int snd_cx88_hw_free(struct snd_pcm_substream *substream)
507 {
508 struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
509
510 if (substream->runtime->dma_area) {
511 dsp_buffer_free(chip);
512 substream->runtime->dma_area = NULL;
513 }
514
515 return 0;
516 }
517
518 /*
519 * prepare callback
520 */
snd_cx88_prepare(struct snd_pcm_substream * substream)521 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
522 {
523 return 0;
524 }
525
526 /*
527 * trigger callback
528 */
snd_cx88_card_trigger(struct snd_pcm_substream * substream,int cmd)529 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
530 {
531 struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
532 int err;
533
534 /* Local interrupts are already disabled by ALSA */
535 spin_lock(&chip->reg_lock);
536
537 switch (cmd) {
538 case SNDRV_PCM_TRIGGER_START:
539 err = _cx88_start_audio_dma(chip);
540 break;
541 case SNDRV_PCM_TRIGGER_STOP:
542 err = _cx88_stop_audio_dma(chip);
543 break;
544 default:
545 err = -EINVAL;
546 break;
547 }
548
549 spin_unlock(&chip->reg_lock);
550
551 return err;
552 }
553
554 /*
555 * pointer callback
556 */
snd_cx88_pointer(struct snd_pcm_substream * substream)557 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
558 {
559 struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
560 struct snd_pcm_runtime *runtime = substream->runtime;
561 u16 count;
562
563 count = atomic_read(&chip->count);
564
565 // dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
566 // count, new, count & (runtime->periods-1),
567 // runtime->period_size * (count & (runtime->periods-1)));
568 return runtime->period_size * (count & (runtime->periods - 1));
569 }
570
571 /*
572 * page callback (needed for mmap)
573 */
snd_cx88_page(struct snd_pcm_substream * substream,unsigned long offset)574 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
575 unsigned long offset)
576 {
577 void *pageptr = substream->runtime->dma_area + offset;
578
579 return vmalloc_to_page(pageptr);
580 }
581
582 /*
583 * operators
584 */
585 static const struct snd_pcm_ops snd_cx88_pcm_ops = {
586 .open = snd_cx88_pcm_open,
587 .close = snd_cx88_close,
588 .hw_params = snd_cx88_hw_params,
589 .hw_free = snd_cx88_hw_free,
590 .prepare = snd_cx88_prepare,
591 .trigger = snd_cx88_card_trigger,
592 .pointer = snd_cx88_pointer,
593 .page = snd_cx88_page,
594 };
595
596 /*
597 * create a PCM device
598 */
snd_cx88_pcm(struct cx88_audio_dev * chip,int device,const char * name)599 static int snd_cx88_pcm(struct cx88_audio_dev *chip, int device,
600 const char *name)
601 {
602 int err;
603 struct snd_pcm *pcm;
604
605 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
606 if (err < 0)
607 return err;
608 pcm->private_data = chip;
609 strscpy(pcm->name, name, sizeof(pcm->name));
610 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
611
612 return 0;
613 }
614
615 /*
616 * CONTROL INTERFACE
617 */
snd_cx88_volume_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * info)618 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
619 struct snd_ctl_elem_info *info)
620 {
621 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
622 info->count = 2;
623 info->value.integer.min = 0;
624 info->value.integer.max = 0x3f;
625
626 return 0;
627 }
628
snd_cx88_volume_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)629 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
630 struct snd_ctl_elem_value *value)
631 {
632 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
633 struct cx88_core *core = chip->core;
634 int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
635 bal = cx_read(AUD_BAL_CTL);
636
637 value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
638 vol -= (bal & 0x3f);
639 value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
640
641 return 0;
642 }
643
snd_cx88_wm8775_volume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)644 static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
645 struct snd_ctl_elem_value *value)
646 {
647 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
648 struct cx88_core *core = chip->core;
649 u16 left = value->value.integer.value[0];
650 u16 right = value->value.integer.value[1];
651 int v, b;
652
653 /* Pass volume & balance onto any WM8775 */
654 if (left >= right) {
655 v = left << 10;
656 b = left ? (0x8000 * right) / left : 0x8000;
657 } else {
658 v = right << 10;
659 b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
660 }
661 wm8775_s_ctrl(core, V4L2_CID_AUDIO_VOLUME, v);
662 wm8775_s_ctrl(core, V4L2_CID_AUDIO_BALANCE, b);
663 }
664
665 /* OK - TODO: test it */
snd_cx88_volume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)666 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
667 struct snd_ctl_elem_value *value)
668 {
669 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
670 struct cx88_core *core = chip->core;
671 int left, right, v, b;
672 int changed = 0;
673 u32 old;
674
675 if (core->sd_wm8775)
676 snd_cx88_wm8775_volume_put(kcontrol, value);
677
678 left = value->value.integer.value[0] & 0x3f;
679 right = value->value.integer.value[1] & 0x3f;
680 b = right - left;
681 if (b < 0) {
682 v = 0x3f - left;
683 b = (-b) | 0x40;
684 } else {
685 v = 0x3f - right;
686 }
687 /* Do we really know this will always be called with IRQs on? */
688 spin_lock_irq(&chip->reg_lock);
689 old = cx_read(AUD_VOL_CTL);
690 if (v != (old & 0x3f)) {
691 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
692 changed = 1;
693 }
694 if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
695 cx_write(AUD_BAL_CTL, b);
696 changed = 1;
697 }
698 spin_unlock_irq(&chip->reg_lock);
699
700 return changed;
701 }
702
703 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
704
705 static const struct snd_kcontrol_new snd_cx88_volume = {
706 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
707 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
708 SNDRV_CTL_ELEM_ACCESS_TLV_READ,
709 .name = "Analog-TV Volume",
710 .info = snd_cx88_volume_info,
711 .get = snd_cx88_volume_get,
712 .put = snd_cx88_volume_put,
713 .tlv.p = snd_cx88_db_scale,
714 };
715
snd_cx88_switch_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)716 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
717 struct snd_ctl_elem_value *value)
718 {
719 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
720 struct cx88_core *core = chip->core;
721 u32 bit = kcontrol->private_value;
722
723 value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
724 return 0;
725 }
726
snd_cx88_switch_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)727 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
728 struct snd_ctl_elem_value *value)
729 {
730 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
731 struct cx88_core *core = chip->core;
732 u32 bit = kcontrol->private_value;
733 int ret = 0;
734 u32 vol;
735
736 spin_lock_irq(&chip->reg_lock);
737 vol = cx_read(AUD_VOL_CTL);
738 if (value->value.integer.value[0] != !(vol & bit)) {
739 vol ^= bit;
740 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
741 /* Pass mute onto any WM8775 */
742 if (core->sd_wm8775 && ((1 << 6) == bit))
743 wm8775_s_ctrl(core,
744 V4L2_CID_AUDIO_MUTE, 0 != (vol & bit));
745 ret = 1;
746 }
747 spin_unlock_irq(&chip->reg_lock);
748 return ret;
749 }
750
751 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
752 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
753 .name = "Audio-Out Switch",
754 .info = snd_ctl_boolean_mono_info,
755 .get = snd_cx88_switch_get,
756 .put = snd_cx88_switch_put,
757 .private_value = (1 << 8),
758 };
759
760 static const struct snd_kcontrol_new snd_cx88_source_switch = {
761 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
762 .name = "Analog-TV Switch",
763 .info = snd_ctl_boolean_mono_info,
764 .get = snd_cx88_switch_get,
765 .put = snd_cx88_switch_put,
766 .private_value = (1 << 6),
767 };
768
snd_cx88_alc_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)769 static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
770 struct snd_ctl_elem_value *value)
771 {
772 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
773 struct cx88_core *core = chip->core;
774 s32 val;
775
776 val = wm8775_g_ctrl(core, V4L2_CID_AUDIO_LOUDNESS);
777 value->value.integer.value[0] = val ? 1 : 0;
778 return 0;
779 }
780
snd_cx88_alc_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)781 static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
782 struct snd_ctl_elem_value *value)
783 {
784 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
785 struct cx88_core *core = chip->core;
786
787 wm8775_s_ctrl(core, V4L2_CID_AUDIO_LOUDNESS,
788 value->value.integer.value[0] != 0);
789 return 0;
790 }
791
792 static const struct snd_kcontrol_new snd_cx88_alc_switch = {
793 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
794 .name = "Line-In ALC Switch",
795 .info = snd_ctl_boolean_mono_info,
796 .get = snd_cx88_alc_get,
797 .put = snd_cx88_alc_put,
798 };
799
800 /*
801 * Basic Flow for Sound Devices
802 */
803
804 /*
805 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
806 * Only boards with eeprom and byte 1 at eeprom=1 have it
807 */
808
809 static const struct pci_device_id cx88_audio_pci_tbl[] = {
810 {0x14f1, 0x8801, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
811 {0x14f1, 0x8811, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
812 {0, }
813 };
814 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
815
816 /*
817 * Chip-specific destructor
818 */
819
snd_cx88_free(struct cx88_audio_dev * chip)820 static int snd_cx88_free(struct cx88_audio_dev *chip)
821 {
822 if (chip->irq >= 0)
823 free_irq(chip->irq, chip);
824
825 cx88_core_put(chip->core, chip->pci);
826
827 pci_disable_device(chip->pci);
828 return 0;
829 }
830
831 /*
832 * Component Destructor
833 */
snd_cx88_dev_free(struct snd_card * card)834 static void snd_cx88_dev_free(struct snd_card *card)
835 {
836 struct cx88_audio_dev *chip = card->private_data;
837
838 snd_cx88_free(chip);
839 }
840
841 /*
842 * Alsa Constructor - Component probe
843 */
844
845 static int devno;
snd_cx88_create(struct snd_card * card,struct pci_dev * pci,struct cx88_audio_dev ** rchip,struct cx88_core ** core_ptr)846 static int snd_cx88_create(struct snd_card *card, struct pci_dev *pci,
847 struct cx88_audio_dev **rchip,
848 struct cx88_core **core_ptr)
849 {
850 struct cx88_audio_dev *chip;
851 struct cx88_core *core;
852 int err;
853 unsigned char pci_lat;
854
855 *rchip = NULL;
856
857 err = pci_enable_device(pci);
858 if (err < 0)
859 return err;
860
861 pci_set_master(pci);
862
863 chip = card->private_data;
864
865 core = cx88_core_get(pci);
866 if (!core) {
867 err = -EINVAL;
868 return err;
869 }
870
871 err = dma_set_mask(&pci->dev, DMA_BIT_MASK(32));
872 if (err) {
873 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n", core->name);
874 cx88_core_put(core, pci);
875 return err;
876 }
877
878 /* pci init */
879 chip->card = card;
880 chip->pci = pci;
881 chip->irq = -1;
882 spin_lock_init(&chip->reg_lock);
883
884 chip->core = core;
885
886 /* get irq */
887 err = request_irq(chip->pci->irq, cx8801_irq,
888 IRQF_SHARED, chip->core->name, chip);
889 if (err < 0) {
890 dprintk(0, "%s: can't get IRQ %d\n",
891 chip->core->name, chip->pci->irq);
892 return err;
893 }
894
895 /* print pci info */
896 pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
897
898 dprintk(1,
899 "ALSA %s/%i: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
900 core->name, devno,
901 pci_name(pci), pci->revision, pci->irq,
902 pci_lat, (unsigned long long)pci_resource_start(pci, 0));
903
904 chip->irq = pci->irq;
905 synchronize_irq(chip->irq);
906
907 *rchip = chip;
908 *core_ptr = core;
909
910 return 0;
911 }
912
cx88_audio_initdev(struct pci_dev * pci,const struct pci_device_id * pci_id)913 static int cx88_audio_initdev(struct pci_dev *pci,
914 const struct pci_device_id *pci_id)
915 {
916 struct snd_card *card;
917 struct cx88_audio_dev *chip;
918 struct cx88_core *core = NULL;
919 int err;
920
921 if (devno >= SNDRV_CARDS)
922 return (-ENODEV);
923
924 if (!enable[devno]) {
925 ++devno;
926 return (-ENOENT);
927 }
928
929 err = snd_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
930 sizeof(struct cx88_audio_dev), &card);
931 if (err < 0)
932 return err;
933
934 card->private_free = snd_cx88_dev_free;
935
936 err = snd_cx88_create(card, pci, &chip, &core);
937 if (err < 0)
938 goto error;
939
940 err = snd_cx88_pcm(chip, 0, "CX88 Digital");
941 if (err < 0)
942 goto error;
943
944 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
945 if (err < 0)
946 goto error;
947 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
948 if (err < 0)
949 goto error;
950 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
951 if (err < 0)
952 goto error;
953
954 /* If there's a wm8775 then add a Line-In ALC switch */
955 if (core->sd_wm8775) {
956 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
957 if (err < 0)
958 goto error;
959 }
960
961 strscpy(card->driver, "CX88x", sizeof(card->driver));
962 sprintf(card->shortname, "Conexant CX%x", pci->device);
963 sprintf(card->longname, "%s at %#llx",
964 card->shortname,
965 (unsigned long long)pci_resource_start(pci, 0));
966 strscpy(card->mixername, "CX88", sizeof(card->mixername));
967
968 dprintk(0, "%s/%i: ALSA support for cx2388x boards\n",
969 card->driver, devno);
970
971 err = snd_card_register(card);
972 if (err < 0)
973 goto error;
974 pci_set_drvdata(pci, card);
975
976 devno++;
977 return 0;
978
979 error:
980 snd_card_free(card);
981 return err;
982 }
983
984 /*
985 * ALSA destructor
986 */
cx88_audio_finidev(struct pci_dev * pci)987 static void cx88_audio_finidev(struct pci_dev *pci)
988 {
989 struct snd_card *card = pci_get_drvdata(pci);
990
991 snd_card_free(card);
992
993 devno--;
994 }
995
996 /*
997 * PCI driver definition
998 */
999
1000 static struct pci_driver cx88_audio_pci_driver = {
1001 .name = "cx88_audio",
1002 .id_table = cx88_audio_pci_tbl,
1003 .probe = cx88_audio_initdev,
1004 .remove = cx88_audio_finidev,
1005 };
1006
1007 module_pci_driver(cx88_audio_pci_driver);
1008