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 int 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 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},{{Conexant,23882},{{Conexant,23883}");
102 static unsigned int debug;
103 module_param(debug, int, 0644);
104 MODULE_PARM_DESC(debug, "enable debug messages");
105
106 /*
107 * Module specific functions
108 */
109
110 /*
111 * BOARD Specific: Sets audio DMA
112 */
113
_cx88_start_audio_dma(struct cx88_audio_dev * chip)114 static int _cx88_start_audio_dma(struct cx88_audio_dev *chip)
115 {
116 struct cx88_audio_buffer *buf = chip->buf;
117 struct cx88_core *core = chip->core;
118 const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
119
120 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
121 cx_clear(MO_AUD_DMACNTRL, 0x11);
122
123 /* setup fifo + format - out channel */
124 cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
125
126 /* sets bpl size */
127 cx_write(MO_AUDD_LNGTH, buf->bpl);
128
129 /* reset counter */
130 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
131 atomic_set(&chip->count, 0);
132
133 dprintk(1,
134 "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d byte buffer\n",
135 buf->bpl, cx_read(audio_ch->cmds_start + 8) >> 1,
136 chip->num_periods, buf->bpl * chip->num_periods);
137
138 /* Enables corresponding bits at AUD_INT_STAT */
139 cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
140 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
141
142 /* Clean any pending interrupt bits already set */
143 cx_write(MO_AUD_INTSTAT, ~0);
144
145 /* enable audio irqs */
146 cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
147
148 /* start dma */
149
150 /* Enables Risc Processor */
151 cx_set(MO_DEV_CNTRL2, (1 << 5));
152 /* audio downstream FIFO and RISC enable */
153 cx_set(MO_AUD_DMACNTRL, 0x11);
154
155 if (debug)
156 cx88_sram_channel_dump(chip->core, audio_ch);
157
158 return 0;
159 }
160
161 /*
162 * BOARD Specific: Resets audio DMA
163 */
_cx88_stop_audio_dma(struct cx88_audio_dev * chip)164 static int _cx88_stop_audio_dma(struct cx88_audio_dev *chip)
165 {
166 struct cx88_core *core = chip->core;
167
168 dprintk(1, "Stopping audio DMA\n");
169
170 /* stop dma */
171 cx_clear(MO_AUD_DMACNTRL, 0x11);
172
173 /* disable irqs */
174 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
175 cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
176 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
177
178 if (debug)
179 cx88_sram_channel_dump(chip->core,
180 &cx88_sram_channels[SRAM_CH25]);
181
182 return 0;
183 }
184
185 #define MAX_IRQ_LOOP 50
186
187 /*
188 * BOARD Specific: IRQ dma bits
189 */
190 static const char *cx88_aud_irqs[32] = {
191 "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
192 NULL, /* reserved */
193 "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
194 NULL, /* reserved */
195 "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */
196 NULL, /* reserved */
197 "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */
198 NULL, /* reserved */
199 "opc_err", "par_err", "rip_err", /* 16-18 */
200 "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */
201 };
202
203 /*
204 * BOARD Specific: Threats IRQ audio specific calls
205 */
cx8801_aud_irq(struct cx88_audio_dev * chip)206 static void cx8801_aud_irq(struct cx88_audio_dev *chip)
207 {
208 struct cx88_core *core = chip->core;
209 u32 status, mask;
210
211 status = cx_read(MO_AUD_INTSTAT);
212 mask = cx_read(MO_AUD_INTMSK);
213 if (0 == (status & mask))
214 return;
215 cx_write(MO_AUD_INTSTAT, status);
216 if (debug > 1 || (status & mask & ~0xff))
217 cx88_print_irqbits("irq aud",
218 cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
219 status, mask);
220 /* risc op code error */
221 if (status & AUD_INT_OPC_ERR) {
222 pr_warn("Audio risc op code error\n");
223 cx_clear(MO_AUD_DMACNTRL, 0x11);
224 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
225 }
226 if (status & AUD_INT_DN_SYNC) {
227 dprintk(1, "Downstream sync error\n");
228 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
229 return;
230 }
231 /* risc1 downstream */
232 if (status & AUD_INT_DN_RISCI1) {
233 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
234 snd_pcm_period_elapsed(chip->substream);
235 }
236 /* FIXME: Any other status should deserve a special handling? */
237 }
238
239 /*
240 * BOARD Specific: Handles IRQ calls
241 */
cx8801_irq(int irq,void * dev_id)242 static irqreturn_t cx8801_irq(int irq, void *dev_id)
243 {
244 struct cx88_audio_dev *chip = dev_id;
245 struct cx88_core *core = chip->core;
246 u32 status;
247 int loop, handled = 0;
248
249 for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
250 status = cx_read(MO_PCI_INTSTAT) &
251 (core->pci_irqmask | PCI_INT_AUDINT);
252 if (status == 0)
253 goto out;
254 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
255 loop, MAX_IRQ_LOOP, status);
256 handled = 1;
257 cx_write(MO_PCI_INTSTAT, status);
258
259 if (status & core->pci_irqmask)
260 cx88_core_irq(core, status);
261 if (status & PCI_INT_AUDINT)
262 cx8801_aud_irq(chip);
263 }
264
265 if (loop == MAX_IRQ_LOOP) {
266 pr_err("IRQ loop detected, disabling interrupts\n");
267 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
268 }
269
270 out:
271 return IRQ_RETVAL(handled);
272 }
273
cx88_alsa_dma_init(struct cx88_audio_dev * chip,int nr_pages)274 static int cx88_alsa_dma_init(struct cx88_audio_dev *chip, int 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(%d pages) failed\n", nr_pages);
283 return -ENOMEM;
284 }
285
286 dprintk(1, "vmalloc is at addr %p, size=%d\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, PCI_DMA_FROMDEVICE);
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->sglen,
336 PCI_DMA_FROMDEVICE);
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 pci_free_consistent(chip->pci, risc->size,
361 risc->cpu, 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 .ioctl = snd_pcm_lib_ioctl,
589 .hw_params = snd_cx88_hw_params,
590 .hw_free = snd_cx88_hw_free,
591 .prepare = snd_cx88_prepare,
592 .trigger = snd_cx88_card_trigger,
593 .pointer = snd_cx88_pointer,
594 .page = snd_cx88_page,
595 };
596
597 /*
598 * create a PCM device
599 */
snd_cx88_pcm(struct cx88_audio_dev * chip,int device,const char * name)600 static int snd_cx88_pcm(struct cx88_audio_dev *chip, int device,
601 const char *name)
602 {
603 int err;
604 struct snd_pcm *pcm;
605
606 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
607 if (err < 0)
608 return err;
609 pcm->private_data = chip;
610 strscpy(pcm->name, name, sizeof(pcm->name));
611 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
612
613 return 0;
614 }
615
616 /*
617 * CONTROL INTERFACE
618 */
snd_cx88_volume_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * info)619 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
620 struct snd_ctl_elem_info *info)
621 {
622 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
623 info->count = 2;
624 info->value.integer.min = 0;
625 info->value.integer.max = 0x3f;
626
627 return 0;
628 }
629
snd_cx88_volume_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)630 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
631 struct snd_ctl_elem_value *value)
632 {
633 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
634 struct cx88_core *core = chip->core;
635 int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
636 bal = cx_read(AUD_BAL_CTL);
637
638 value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
639 vol -= (bal & 0x3f);
640 value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
641
642 return 0;
643 }
644
snd_cx88_wm8775_volume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)645 static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
646 struct snd_ctl_elem_value *value)
647 {
648 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
649 struct cx88_core *core = chip->core;
650 u16 left = value->value.integer.value[0];
651 u16 right = value->value.integer.value[1];
652 int v, b;
653
654 /* Pass volume & balance onto any WM8775 */
655 if (left >= right) {
656 v = left << 10;
657 b = left ? (0x8000 * right) / left : 0x8000;
658 } else {
659 v = right << 10;
660 b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
661 }
662 wm8775_s_ctrl(core, V4L2_CID_AUDIO_VOLUME, v);
663 wm8775_s_ctrl(core, V4L2_CID_AUDIO_BALANCE, b);
664 }
665
666 /* OK - TODO: test it */
snd_cx88_volume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)667 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
668 struct snd_ctl_elem_value *value)
669 {
670 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
671 struct cx88_core *core = chip->core;
672 int left, right, v, b;
673 int changed = 0;
674 u32 old;
675
676 if (core->sd_wm8775)
677 snd_cx88_wm8775_volume_put(kcontrol, value);
678
679 left = value->value.integer.value[0] & 0x3f;
680 right = value->value.integer.value[1] & 0x3f;
681 b = right - left;
682 if (b < 0) {
683 v = 0x3f - left;
684 b = (-b) | 0x40;
685 } else {
686 v = 0x3f - right;
687 }
688 /* Do we really know this will always be called with IRQs on? */
689 spin_lock_irq(&chip->reg_lock);
690 old = cx_read(AUD_VOL_CTL);
691 if (v != (old & 0x3f)) {
692 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
693 changed = 1;
694 }
695 if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
696 cx_write(AUD_BAL_CTL, b);
697 changed = 1;
698 }
699 spin_unlock_irq(&chip->reg_lock);
700
701 return changed;
702 }
703
704 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
705
706 static const struct snd_kcontrol_new snd_cx88_volume = {
707 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
708 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
709 SNDRV_CTL_ELEM_ACCESS_TLV_READ,
710 .name = "Analog-TV Volume",
711 .info = snd_cx88_volume_info,
712 .get = snd_cx88_volume_get,
713 .put = snd_cx88_volume_put,
714 .tlv.p = snd_cx88_db_scale,
715 };
716
snd_cx88_switch_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)717 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
718 struct snd_ctl_elem_value *value)
719 {
720 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
721 struct cx88_core *core = chip->core;
722 u32 bit = kcontrol->private_value;
723
724 value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
725 return 0;
726 }
727
snd_cx88_switch_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)728 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
729 struct snd_ctl_elem_value *value)
730 {
731 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
732 struct cx88_core *core = chip->core;
733 u32 bit = kcontrol->private_value;
734 int ret = 0;
735 u32 vol;
736
737 spin_lock_irq(&chip->reg_lock);
738 vol = cx_read(AUD_VOL_CTL);
739 if (value->value.integer.value[0] != !(vol & bit)) {
740 vol ^= bit;
741 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
742 /* Pass mute onto any WM8775 */
743 if (core->sd_wm8775 && ((1 << 6) == bit))
744 wm8775_s_ctrl(core,
745 V4L2_CID_AUDIO_MUTE, 0 != (vol & bit));
746 ret = 1;
747 }
748 spin_unlock_irq(&chip->reg_lock);
749 return ret;
750 }
751
752 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
753 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
754 .name = "Audio-Out Switch",
755 .info = snd_ctl_boolean_mono_info,
756 .get = snd_cx88_switch_get,
757 .put = snd_cx88_switch_put,
758 .private_value = (1 << 8),
759 };
760
761 static const struct snd_kcontrol_new snd_cx88_source_switch = {
762 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
763 .name = "Analog-TV Switch",
764 .info = snd_ctl_boolean_mono_info,
765 .get = snd_cx88_switch_get,
766 .put = snd_cx88_switch_put,
767 .private_value = (1 << 6),
768 };
769
snd_cx88_alc_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)770 static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
771 struct snd_ctl_elem_value *value)
772 {
773 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
774 struct cx88_core *core = chip->core;
775 s32 val;
776
777 val = wm8775_g_ctrl(core, V4L2_CID_AUDIO_LOUDNESS);
778 value->value.integer.value[0] = val ? 1 : 0;
779 return 0;
780 }
781
snd_cx88_alc_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)782 static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
783 struct snd_ctl_elem_value *value)
784 {
785 struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
786 struct cx88_core *core = chip->core;
787
788 wm8775_s_ctrl(core, V4L2_CID_AUDIO_LOUDNESS,
789 value->value.integer.value[0] != 0);
790 return 0;
791 }
792
793 static const struct snd_kcontrol_new snd_cx88_alc_switch = {
794 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
795 .name = "Line-In ALC Switch",
796 .info = snd_ctl_boolean_mono_info,
797 .get = snd_cx88_alc_get,
798 .put = snd_cx88_alc_put,
799 };
800
801 /*
802 * Basic Flow for Sound Devices
803 */
804
805 /*
806 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
807 * Only boards with eeprom and byte 1 at eeprom=1 have it
808 */
809
810 static const struct pci_device_id cx88_audio_pci_tbl[] = {
811 {0x14f1, 0x8801, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
812 {0x14f1, 0x8811, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
813 {0, }
814 };
815 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
816
817 /*
818 * Chip-specific destructor
819 */
820
snd_cx88_free(struct cx88_audio_dev * chip)821 static int snd_cx88_free(struct cx88_audio_dev *chip)
822 {
823 if (chip->irq >= 0)
824 free_irq(chip->irq, chip);
825
826 cx88_core_put(chip->core, chip->pci);
827
828 pci_disable_device(chip->pci);
829 return 0;
830 }
831
832 /*
833 * Component Destructor
834 */
snd_cx88_dev_free(struct snd_card * card)835 static void snd_cx88_dev_free(struct snd_card *card)
836 {
837 struct cx88_audio_dev *chip = card->private_data;
838
839 snd_cx88_free(chip);
840 }
841
842 /*
843 * Alsa Constructor - Component probe
844 */
845
846 static int devno;
snd_cx88_create(struct snd_card * card,struct pci_dev * pci,struct cx88_audio_dev ** rchip,struct cx88_core ** core_ptr)847 static int snd_cx88_create(struct snd_card *card, struct pci_dev *pci,
848 struct cx88_audio_dev **rchip,
849 struct cx88_core **core_ptr)
850 {
851 struct cx88_audio_dev *chip;
852 struct cx88_core *core;
853 int err;
854 unsigned char pci_lat;
855
856 *rchip = NULL;
857
858 err = pci_enable_device(pci);
859 if (err < 0)
860 return err;
861
862 pci_set_master(pci);
863
864 chip = card->private_data;
865
866 core = cx88_core_get(pci);
867 if (!core) {
868 err = -EINVAL;
869 return err;
870 }
871
872 err = pci_set_dma_mask(pci, DMA_BIT_MASK(32));
873 if (err) {
874 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n", core->name);
875 cx88_core_put(core, pci);
876 return err;
877 }
878
879 /* pci init */
880 chip->card = card;
881 chip->pci = pci;
882 chip->irq = -1;
883 spin_lock_init(&chip->reg_lock);
884
885 chip->core = core;
886
887 /* get irq */
888 err = request_irq(chip->pci->irq, cx8801_irq,
889 IRQF_SHARED, chip->core->name, chip);
890 if (err < 0) {
891 dprintk(0, "%s: can't get IRQ %d\n",
892 chip->core->name, chip->pci->irq);
893 return err;
894 }
895
896 /* print pci info */
897 pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
898
899 dprintk(1,
900 "ALSA %s/%i: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
901 core->name, devno,
902 pci_name(pci), pci->revision, pci->irq,
903 pci_lat, (unsigned long long)pci_resource_start(pci, 0));
904
905 chip->irq = pci->irq;
906 synchronize_irq(chip->irq);
907
908 *rchip = chip;
909 *core_ptr = core;
910
911 return 0;
912 }
913
cx88_audio_initdev(struct pci_dev * pci,const struct pci_device_id * pci_id)914 static int cx88_audio_initdev(struct pci_dev *pci,
915 const struct pci_device_id *pci_id)
916 {
917 struct snd_card *card;
918 struct cx88_audio_dev *chip;
919 struct cx88_core *core = NULL;
920 int err;
921
922 if (devno >= SNDRV_CARDS)
923 return (-ENODEV);
924
925 if (!enable[devno]) {
926 ++devno;
927 return (-ENOENT);
928 }
929
930 err = snd_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
931 sizeof(struct cx88_audio_dev), &card);
932 if (err < 0)
933 return err;
934
935 card->private_free = snd_cx88_dev_free;
936
937 err = snd_cx88_create(card, pci, &chip, &core);
938 if (err < 0)
939 goto error;
940
941 err = snd_cx88_pcm(chip, 0, "CX88 Digital");
942 if (err < 0)
943 goto error;
944
945 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
946 if (err < 0)
947 goto error;
948 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
949 if (err < 0)
950 goto error;
951 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
952 if (err < 0)
953 goto error;
954
955 /* If there's a wm8775 then add a Line-In ALC switch */
956 if (core->sd_wm8775) {
957 err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
958 if (err < 0)
959 goto error;
960 }
961
962 strscpy(card->driver, "CX88x", sizeof(card->driver));
963 sprintf(card->shortname, "Conexant CX%x", pci->device);
964 sprintf(card->longname, "%s at %#llx",
965 card->shortname,
966 (unsigned long long)pci_resource_start(pci, 0));
967 strscpy(card->mixername, "CX88", sizeof(card->mixername));
968
969 dprintk(0, "%s/%i: ALSA support for cx2388x boards\n",
970 card->driver, devno);
971
972 err = snd_card_register(card);
973 if (err < 0)
974 goto error;
975 pci_set_drvdata(pci, card);
976
977 devno++;
978 return 0;
979
980 error:
981 snd_card_free(card);
982 return err;
983 }
984
985 /*
986 * ALSA destructor
987 */
cx88_audio_finidev(struct pci_dev * pci)988 static void cx88_audio_finidev(struct pci_dev *pci)
989 {
990 struct snd_card *card = pci_get_drvdata(pci);
991
992 snd_card_free(card);
993
994 devno--;
995 }
996
997 /*
998 * PCI driver definition
999 */
1000
1001 static struct pci_driver cx88_audio_pci_driver = {
1002 .name = "cx88_audio",
1003 .id_table = cx88_audio_pci_tbl,
1004 .probe = cx88_audio_initdev,
1005 .remove = cx88_audio_finidev,
1006 };
1007
1008 module_pci_driver(cx88_audio_pci_driver);
1009
