Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/media/pci/cx88/cx88-alsa.c

  1 /*
  2  *  Support for audio capture
  3  *  PCI function #1 of the cx2388x.
  4  *
  5  *    (c) 2007 Trent Piepho <xyzzy@speakeasy.org>
  6  *    (c) 2005,2006 Ricardo Cerqueira <v4l@cerqueira.org>
  7  *    (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
  8  *    Based on a dummy cx88 module by Gerd Knorr <kraxel@bytesex.org>
  9  *    Based on dummy.c by Jaroslav Kysela <perex@perex.cz>
 10  *
 11  *  This program is free software; you can redistribute it and/or modify
 12  *  it under the terms of the GNU General Public License as published by
 13  *  the Free Software Foundation; either version 2 of the License, or
 14  *  (at your option) any later version.
 15  *
 16  *  This program is distributed in the hope that it will be useful,
 17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 19  *  GNU General Public License for more details.
 20  */
 21 
 22 #include "cx88.h"
 23 #include "cx88-reg.h"
 24 
 25 #include <linux/module.h>
 26 #include <linux/init.h>
 27 #include <linux/delay.h>
 28 #include <linux/device.h>
 29 #include <linux/interrupt.h>
 30 #include <linux/vmalloc.h>
 31 #include <linux/dma-mapping.h>
 32 #include <linux/pci.h>
 33 #include <linux/slab.h>
 34 
 35 #include <sound/core.h>
 36 #include <sound/pcm.h>
 37 #include <sound/pcm_params.h>
 38 #include <sound/control.h>
 39 #include <sound/initval.h>
 40 #include <sound/tlv.h>
 41 #include <media/i2c/wm8775.h>
 42 
 43 #define dprintk(level, fmt, arg...) do {                                \
 44         if (debug + 1 > level)                                          \
 45                 printk(KERN_DEBUG pr_fmt("%s: alsa: " fmt),             \
 46                         chip->core->name, ##arg);                       \
 47 } while (0)
 48 
 49 /*
 50  * Data type declarations - Can be moded to a header file later
 51  */
 52 
 53 struct cx88_audio_buffer {
 54         unsigned int               bpl;
 55         struct cx88_riscmem        risc;
 56         void                    *vaddr;
 57         struct scatterlist      *sglist;
 58         int                     sglen;
 59         int                     nr_pages;
 60 };
 61 
 62 struct cx88_audio_dev {
 63         struct cx88_core           *core;
 64         struct cx88_dmaqueue       q;
 65 
 66         /* pci i/o */
 67         struct pci_dev             *pci;
 68 
 69         /* audio controls */
 70         int                        irq;
 71 
 72         struct snd_card            *card;
 73 
 74         spinlock_t                 reg_lock;
 75         atomic_t                   count;
 76 
 77         unsigned int               dma_size;
 78         unsigned int               period_size;
 79         unsigned int               num_periods;
 80 
 81         struct cx88_audio_buffer   *buf;
 82 
 83         struct snd_pcm_substream   *substream;
 84 };
 85 
 86 /*
 87  * Module global static vars
 88  */
 89 
 90 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 91 static const char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
 92 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 93 
 94 module_param_array(enable, bool, NULL, 0444);
 95 MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
 96 
 97 module_param_array(index, int, NULL, 0444);
 98 MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
 99 
100 /*
101  * Module macros
102  */
103 
104 MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
105 MODULE_AUTHOR("Ricardo Cerqueira");
106 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
107 MODULE_LICENSE("GPL");
108 MODULE_VERSION(CX88_VERSION);
109 
110 MODULE_SUPPORTED_DEVICE("{{Conexant,23881},{{Conexant,23882},{{Conexant,23883}");
111 static unsigned int debug;
112 module_param(debug, int, 0644);
113 MODULE_PARM_DESC(debug, "enable debug messages");
114 
115 /*
116  * Module specific functions
117  */
118 
119 /*
120  * BOARD Specific: Sets audio DMA
121  */
122 
123 static int _cx88_start_audio_dma(struct cx88_audio_dev *chip)
124 {
125         struct cx88_audio_buffer *buf = chip->buf;
126         struct cx88_core *core = chip->core;
127         const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
128 
129         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
130         cx_clear(MO_AUD_DMACNTRL, 0x11);
131 
132         /* setup fifo + format - out channel */
133         cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
134 
135         /* sets bpl size */
136         cx_write(MO_AUDD_LNGTH, buf->bpl);
137 
138         /* reset counter */
139         cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
140         atomic_set(&chip->count, 0);
141 
142         dprintk(1,
143                 "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d byte buffer\n",
144                 buf->bpl, cx_read(audio_ch->cmds_start + 8) >> 1,
145                 chip->num_periods, buf->bpl * chip->num_periods);
146 
147         /* Enables corresponding bits at AUD_INT_STAT */
148         cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
149                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
150 
151         /* Clean any pending interrupt bits already set */
152         cx_write(MO_AUD_INTSTAT, ~0);
153 
154         /* enable audio irqs */
155         cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
156 
157         /* start dma */
158 
159         /* Enables Risc Processor */
160         cx_set(MO_DEV_CNTRL2, (1 << 5));
161         /* audio downstream FIFO and RISC enable */
162         cx_set(MO_AUD_DMACNTRL, 0x11);
163 
164         if (debug)
165                 cx88_sram_channel_dump(chip->core, audio_ch);
166 
167         return 0;
168 }
169 
170 /*
171  * BOARD Specific: Resets audio DMA
172  */
173 static int _cx88_stop_audio_dma(struct cx88_audio_dev *chip)
174 {
175         struct cx88_core *core = chip->core;
176 
177         dprintk(1, "Stopping audio DMA\n");
178 
179         /* stop dma */
180         cx_clear(MO_AUD_DMACNTRL, 0x11);
181 
182         /* disable irqs */
183         cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
184         cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
185                                 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
186 
187         if (debug)
188                 cx88_sram_channel_dump(chip->core,
189                                        &cx88_sram_channels[SRAM_CH25]);
190 
191         return 0;
192 }
193 
194 #define MAX_IRQ_LOOP 50
195 
196 /*
197  * BOARD Specific: IRQ dma bits
198  */
199 static const char *cx88_aud_irqs[32] = {
200         "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
201         NULL,                                     /* reserved */
202         "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
203         NULL,                                     /* reserved */
204         "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
205         NULL,                                     /* reserved */
206         "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
207         NULL,                                     /* reserved */
208         "opc_err", "par_err", "rip_err",          /* 16-18 */
209         "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
210 };
211 
212 /*
213  * BOARD Specific: Threats IRQ audio specific calls
214  */
215 static void cx8801_aud_irq(struct cx88_audio_dev *chip)
216 {
217         struct cx88_core *core = chip->core;
218         u32 status, mask;
219 
220         status = cx_read(MO_AUD_INTSTAT);
221         mask   = cx_read(MO_AUD_INTMSK);
222         if (0 == (status & mask))
223                 return;
224         cx_write(MO_AUD_INTSTAT, status);
225         if (debug > 1  ||  (status & mask & ~0xff))
226                 cx88_print_irqbits("irq aud",
227                                    cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
228                                    status, mask);
229         /* risc op code error */
230         if (status & AUD_INT_OPC_ERR) {
231                 pr_warn("Audio risc op code error\n");
232                 cx_clear(MO_AUD_DMACNTRL, 0x11);
233                 cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
234         }
235         if (status & AUD_INT_DN_SYNC) {
236                 dprintk(1, "Downstream sync error\n");
237                 cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
238                 return;
239         }
240         /* risc1 downstream */
241         if (status & AUD_INT_DN_RISCI1) {
242                 atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
243                 snd_pcm_period_elapsed(chip->substream);
244         }
245         /* FIXME: Any other status should deserve a special handling? */
246 }
247 
248 /*
249  * BOARD Specific: Handles IRQ calls
250  */
251 static irqreturn_t cx8801_irq(int irq, void *dev_id)
252 {
253         struct cx88_audio_dev *chip = dev_id;
254         struct cx88_core *core = chip->core;
255         u32 status;
256         int loop, handled = 0;
257 
258         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
259                 status = cx_read(MO_PCI_INTSTAT) &
260                         (core->pci_irqmask | PCI_INT_AUDINT);
261                 if (status == 0)
262                         goto out;
263                 dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
264                         loop, MAX_IRQ_LOOP, status);
265                 handled = 1;
266                 cx_write(MO_PCI_INTSTAT, status);
267 
268                 if (status & core->pci_irqmask)
269                         cx88_core_irq(core, status);
270                 if (status & PCI_INT_AUDINT)
271                         cx8801_aud_irq(chip);
272         }
273 
274         if (loop == MAX_IRQ_LOOP) {
275                 pr_err("IRQ loop detected, disabling interrupts\n");
276                 cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
277         }
278 
279  out:
280         return IRQ_RETVAL(handled);
281 }
282 
283 static int cx88_alsa_dma_init(struct cx88_audio_dev *chip, int nr_pages)
284 {
285         struct cx88_audio_buffer *buf = chip->buf;
286         struct page *pg;
287         int i;
288 
289         buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
290         if (!buf->vaddr) {
291                 dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages);
292                 return -ENOMEM;
293         }
294 
295         dprintk(1, "vmalloc is at addr 0x%08lx, size=%d\n",
296                 (unsigned long)buf->vaddr, nr_pages << PAGE_SHIFT);
297 
298         memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
299         buf->nr_pages = nr_pages;
300 
301         buf->sglist = vzalloc(buf->nr_pages * sizeof(*buf->sglist));
302         if (!buf->sglist)
303                 goto vzalloc_err;
304 
305         sg_init_table(buf->sglist, buf->nr_pages);
306         for (i = 0; i < buf->nr_pages; i++) {
307                 pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
308                 if (!pg)
309                         goto vmalloc_to_page_err;
310                 sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
311         }
312         return 0;
313 
314 vmalloc_to_page_err:
315         vfree(buf->sglist);
316         buf->sglist = NULL;
317 vzalloc_err:
318         vfree(buf->vaddr);
319         buf->vaddr = NULL;
320         return -ENOMEM;
321 }
322 
323 static int cx88_alsa_dma_map(struct cx88_audio_dev *dev)
324 {
325         struct cx88_audio_buffer *buf = dev->buf;
326 
327         buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
328                         buf->nr_pages, PCI_DMA_FROMDEVICE);
329 
330         if (buf->sglen == 0) {
331                 pr_warn("%s: cx88_alsa_map_sg failed\n", __func__);
332                 return -ENOMEM;
333         }
334         return 0;
335 }
336 
337 static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev)
338 {
339         struct cx88_audio_buffer *buf = dev->buf;
340 
341         if (!buf->sglen)
342                 return 0;
343 
344         dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen,
345                      PCI_DMA_FROMDEVICE);
346         buf->sglen = 0;
347         return 0;
348 }
349 
350 static int cx88_alsa_dma_free(struct cx88_audio_buffer *buf)
351 {
352         vfree(buf->sglist);
353         buf->sglist = NULL;
354         vfree(buf->vaddr);
355         buf->vaddr = NULL;
356         return 0;
357 }
358 
359 static int dsp_buffer_free(struct cx88_audio_dev *chip)
360 {
361         struct cx88_riscmem *risc = &chip->buf->risc;
362 
363         WARN_ON(!chip->dma_size);
364 
365         dprintk(2, "Freeing buffer\n");
366         cx88_alsa_dma_unmap(chip);
367         cx88_alsa_dma_free(chip->buf);
368         if (risc->cpu)
369                 pci_free_consistent(chip->pci, risc->size,
370                                     risc->cpu, risc->dma);
371         kfree(chip->buf);
372 
373         chip->buf = NULL;
374 
375         return 0;
376 }
377 
378 /*
379  * ALSA PCM Interface
380  */
381 
382 /*
383  * Digital hardware definition
384  */
385 #define DEFAULT_FIFO_SIZE       4096
386 static const struct snd_pcm_hardware snd_cx88_digital_hw = {
387         .info = SNDRV_PCM_INFO_MMAP |
388                 SNDRV_PCM_INFO_INTERLEAVED |
389                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
390                 SNDRV_PCM_INFO_MMAP_VALID,
391         .formats = SNDRV_PCM_FMTBIT_S16_LE,
392 
393         .rates =                SNDRV_PCM_RATE_48000,
394         .rate_min =             48000,
395         .rate_max =             48000,
396         .channels_min = 2,
397         .channels_max = 2,
398         /*
399          * Analog audio output will be full of clicks and pops if there
400          * are not exactly four lines in the SRAM FIFO buffer.
401          */
402         .period_bytes_min = DEFAULT_FIFO_SIZE / 4,
403         .period_bytes_max = DEFAULT_FIFO_SIZE / 4,
404         .periods_min = 1,
405         .periods_max = 1024,
406         .buffer_bytes_max = (1024 * 1024),
407 };
408 
409 /*
410  * audio pcm capture open callback
411  */
412 static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
413 {
414         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
415         struct snd_pcm_runtime *runtime = substream->runtime;
416         int err;
417 
418         if (!chip) {
419                 pr_err("BUG: cx88 can't find device struct. Can't proceed with open\n");
420                 return -ENODEV;
421         }
422 
423         err = snd_pcm_hw_constraint_pow2(runtime, 0,
424                                          SNDRV_PCM_HW_PARAM_PERIODS);
425         if (err < 0)
426                 goto _error;
427 
428         chip->substream = substream;
429 
430         runtime->hw = snd_cx88_digital_hw;
431 
432         if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
433                 unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
434 
435                 bpl &= ~7; /* must be multiple of 8 */
436                 runtime->hw.period_bytes_min = bpl;
437                 runtime->hw.period_bytes_max = bpl;
438         }
439 
440         return 0;
441 _error:
442         dprintk(1, "Error opening PCM!\n");
443         return err;
444 }
445 
446 /*
447  * audio close callback
448  */
449 static int snd_cx88_close(struct snd_pcm_substream *substream)
450 {
451         return 0;
452 }
453 
454 /*
455  * hw_params callback
456  */
457 static int snd_cx88_hw_params(struct snd_pcm_substream *substream,
458                               struct snd_pcm_hw_params *hw_params)
459 {
460         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
461 
462         struct cx88_audio_buffer *buf;
463         int ret;
464 
465         if (substream->runtime->dma_area) {
466                 dsp_buffer_free(chip);
467                 substream->runtime->dma_area = NULL;
468         }
469 
470         chip->period_size = params_period_bytes(hw_params);
471         chip->num_periods = params_periods(hw_params);
472         chip->dma_size = chip->period_size * params_periods(hw_params);
473 
474         WARN_ON(!chip->dma_size);
475         WARN_ON(chip->num_periods & (chip->num_periods - 1));
476 
477         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
478         if (!buf)
479                 return -ENOMEM;
480 
481         chip->buf = buf;
482         buf->bpl = chip->period_size;
483 
484         ret = cx88_alsa_dma_init(chip,
485                                  (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
486         if (ret < 0)
487                 goto error;
488 
489         ret = cx88_alsa_dma_map(chip);
490         if (ret < 0)
491                 goto error;
492 
493         ret = cx88_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
494                                    chip->period_size, chip->num_periods, 1);
495         if (ret < 0)
496                 goto error;
497 
498         /* Loop back to start of program */
499         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
500         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
501 
502         substream->runtime->dma_area = chip->buf->vaddr;
503         substream->runtime->dma_bytes = chip->dma_size;
504         substream->runtime->dma_addr = 0;
505         return 0;
506 
507 error:
508         kfree(buf);
509         return ret;
510 }
511 
512 /*
513  * hw free callback
514  */
515 static int snd_cx88_hw_free(struct snd_pcm_substream *substream)
516 {
517         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
518 
519         if (substream->runtime->dma_area) {
520                 dsp_buffer_free(chip);
521                 substream->runtime->dma_area = NULL;
522         }
523 
524         return 0;
525 }
526 
527 /*
528  * prepare callback
529  */
530 static int snd_cx88_prepare(struct snd_pcm_substream *substream)
531 {
532         return 0;
533 }
534 
535 /*
536  * trigger callback
537  */
538 static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
539 {
540         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
541         int err;
542 
543         /* Local interrupts are already disabled by ALSA */
544         spin_lock(&chip->reg_lock);
545 
546         switch (cmd) {
547         case SNDRV_PCM_TRIGGER_START:
548                 err = _cx88_start_audio_dma(chip);
549                 break;
550         case SNDRV_PCM_TRIGGER_STOP:
551                 err = _cx88_stop_audio_dma(chip);
552                 break;
553         default:
554                 err =  -EINVAL;
555                 break;
556         }
557 
558         spin_unlock(&chip->reg_lock);
559 
560         return err;
561 }
562 
563 /*
564  * pointer callback
565  */
566 static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
567 {
568         struct cx88_audio_dev *chip = snd_pcm_substream_chip(substream);
569         struct snd_pcm_runtime *runtime = substream->runtime;
570         u16 count;
571 
572         count = atomic_read(&chip->count);
573 
574 //      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
575 //              count, new, count & (runtime->periods-1),
576 //              runtime->period_size * (count & (runtime->periods-1)));
577         return runtime->period_size * (count & (runtime->periods - 1));
578 }
579 
580 /*
581  * page callback (needed for mmap)
582  */
583 static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
584                                   unsigned long offset)
585 {
586         void *pageptr = substream->runtime->dma_area + offset;
587 
588         return vmalloc_to_page(pageptr);
589 }
590 
591 /*
592  * operators
593  */
594 static const struct snd_pcm_ops snd_cx88_pcm_ops = {
595         .open = snd_cx88_pcm_open,
596         .close = snd_cx88_close,
597         .ioctl = snd_pcm_lib_ioctl,
598         .hw_params = snd_cx88_hw_params,
599         .hw_free = snd_cx88_hw_free,
600         .prepare = snd_cx88_prepare,
601         .trigger = snd_cx88_card_trigger,
602         .pointer = snd_cx88_pointer,
603         .page = snd_cx88_page,
604 };
605 
606 /*
607  * create a PCM device
608  */
609 static int snd_cx88_pcm(struct cx88_audio_dev *chip, int device,
610                         const char *name)
611 {
612         int err;
613         struct snd_pcm *pcm;
614 
615         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
616         if (err < 0)
617                 return err;
618         pcm->private_data = chip;
619         strcpy(pcm->name, name);
620         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
621 
622         return 0;
623 }
624 
625 /*
626  * CONTROL INTERFACE
627  */
628 static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
629                                 struct snd_ctl_elem_info *info)
630 {
631         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
632         info->count = 2;
633         info->value.integer.min = 0;
634         info->value.integer.max = 0x3f;
635 
636         return 0;
637 }
638 
639 static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
640                                struct snd_ctl_elem_value *value)
641 {
642         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
643         struct cx88_core *core = chip->core;
644         int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
645             bal = cx_read(AUD_BAL_CTL);
646 
647         value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
648         vol -= (bal & 0x3f);
649         value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
650 
651         return 0;
652 }
653 
654 static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
655                                        struct snd_ctl_elem_value *value)
656 {
657         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
658         struct cx88_core *core = chip->core;
659         int left = value->value.integer.value[0];
660         int right = value->value.integer.value[1];
661         int v, b;
662 
663         /* Pass volume & balance onto any WM8775 */
664         if (left >= right) {
665                 v = left << 10;
666                 b = left ? (0x8000 * right) / left : 0x8000;
667         } else {
668                 v = right << 10;
669                 b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
670         }
671         wm8775_s_ctrl(core, V4L2_CID_AUDIO_VOLUME, v);
672         wm8775_s_ctrl(core, V4L2_CID_AUDIO_BALANCE, b);
673 }
674 
675 /* OK - TODO: test it */
676 static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
677                                struct snd_ctl_elem_value *value)
678 {
679         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
680         struct cx88_core *core = chip->core;
681         int left, right, v, b;
682         int changed = 0;
683         u32 old;
684 
685         if (core->sd_wm8775)
686                 snd_cx88_wm8775_volume_put(kcontrol, value);
687 
688         left = value->value.integer.value[0] & 0x3f;
689         right = value->value.integer.value[1] & 0x3f;
690         b = right - left;
691         if (b < 0) {
692                 v = 0x3f - left;
693                 b = (-b) | 0x40;
694         } else {
695                 v = 0x3f - right;
696         }
697         /* Do we really know this will always be called with IRQs on? */
698         spin_lock_irq(&chip->reg_lock);
699         old = cx_read(AUD_VOL_CTL);
700         if (v != (old & 0x3f)) {
701                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
702                 changed = 1;
703         }
704         if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
705                 cx_write(AUD_BAL_CTL, b);
706                 changed = 1;
707         }
708         spin_unlock_irq(&chip->reg_lock);
709 
710         return changed;
711 }
712 
713 static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
714 
715 static const struct snd_kcontrol_new snd_cx88_volume = {
716         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
717         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
718                   SNDRV_CTL_ELEM_ACCESS_TLV_READ,
719         .name = "Analog-TV Volume",
720         .info = snd_cx88_volume_info,
721         .get = snd_cx88_volume_get,
722         .put = snd_cx88_volume_put,
723         .tlv.p = snd_cx88_db_scale,
724 };
725 
726 static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
727                                struct snd_ctl_elem_value *value)
728 {
729         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
730         struct cx88_core *core = chip->core;
731         u32 bit = kcontrol->private_value;
732 
733         value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
734         return 0;
735 }
736 
737 static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
738                                struct snd_ctl_elem_value *value)
739 {
740         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
741         struct cx88_core *core = chip->core;
742         u32 bit = kcontrol->private_value;
743         int ret = 0;
744         u32 vol;
745 
746         spin_lock_irq(&chip->reg_lock);
747         vol = cx_read(AUD_VOL_CTL);
748         if (value->value.integer.value[0] != !(vol & bit)) {
749                 vol ^= bit;
750                 cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
751                 /* Pass mute onto any WM8775 */
752                 if (core->sd_wm8775 && ((1 << 6) == bit))
753                         wm8775_s_ctrl(core,
754                                       V4L2_CID_AUDIO_MUTE, 0 != (vol & bit));
755                 ret = 1;
756         }
757         spin_unlock_irq(&chip->reg_lock);
758         return ret;
759 }
760 
761 static const struct snd_kcontrol_new snd_cx88_dac_switch = {
762         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
763         .name = "Audio-Out Switch",
764         .info = snd_ctl_boolean_mono_info,
765         .get = snd_cx88_switch_get,
766         .put = snd_cx88_switch_put,
767         .private_value = (1 << 8),
768 };
769 
770 static const struct snd_kcontrol_new snd_cx88_source_switch = {
771         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
772         .name = "Analog-TV Switch",
773         .info = snd_ctl_boolean_mono_info,
774         .get = snd_cx88_switch_get,
775         .put = snd_cx88_switch_put,
776         .private_value = (1 << 6),
777 };
778 
779 static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
780                             struct snd_ctl_elem_value *value)
781 {
782         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
783         struct cx88_core *core = chip->core;
784         s32 val;
785 
786         val = wm8775_g_ctrl(core, V4L2_CID_AUDIO_LOUDNESS);
787         value->value.integer.value[0] = val ? 1 : 0;
788         return 0;
789 }
790 
791 static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
792                             struct snd_ctl_elem_value *value)
793 {
794         struct cx88_audio_dev *chip = snd_kcontrol_chip(kcontrol);
795         struct cx88_core *core = chip->core;
796 
797         wm8775_s_ctrl(core, V4L2_CID_AUDIO_LOUDNESS,
798                       value->value.integer.value[0] != 0);
799         return 0;
800 }
801 
802 static struct snd_kcontrol_new snd_cx88_alc_switch = {
803         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
804         .name = "Line-In ALC Switch",
805         .info = snd_ctl_boolean_mono_info,
806         .get = snd_cx88_alc_get,
807         .put = snd_cx88_alc_put,
808 };
809 
810 /*
811  * Basic Flow for Sound Devices
812  */
813 
814 /*
815  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
816  * Only boards with eeprom and byte 1 at eeprom=1 have it
817  */
818 
819 static const struct pci_device_id cx88_audio_pci_tbl[] = {
820         {0x14f1, 0x8801, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
821         {0x14f1, 0x8811, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
822         {0, }
823 };
824 MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
825 
826 /*
827  * Chip-specific destructor
828  */
829 
830 static int snd_cx88_free(struct cx88_audio_dev *chip)
831 {
832         if (chip->irq >= 0)
833                 free_irq(chip->irq, chip);
834 
835         cx88_core_put(chip->core, chip->pci);
836 
837         pci_disable_device(chip->pci);
838         return 0;
839 }
840 
841 /*
842  * Component Destructor
843  */
844 static void snd_cx88_dev_free(struct snd_card *card)
845 {
846         struct cx88_audio_dev *chip = card->private_data;
847 
848         snd_cx88_free(chip);
849 }
850 
851 /*
852  * Alsa Constructor - Component probe
853  */
854 
855 static int devno;
856 static int snd_cx88_create(struct snd_card *card, struct pci_dev *pci,
857                            struct cx88_audio_dev **rchip,
858                            struct cx88_core **core_ptr)
859 {
860         struct cx88_audio_dev   *chip;
861         struct cx88_core        *core;
862         int                     err;
863         unsigned char           pci_lat;
864 
865         *rchip = NULL;
866 
867         err = pci_enable_device(pci);
868         if (err < 0)
869                 return err;
870 
871         pci_set_master(pci);
872 
873         chip = card->private_data;
874 
875         core = cx88_core_get(pci);
876         if (!core) {
877                 err = -EINVAL;
878                 return err;
879         }
880 
881         err = pci_set_dma_mask(pci, DMA_BIT_MASK(32));
882         if (err) {
883                 dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n", core->name);
884                 cx88_core_put(core, pci);
885                 return err;
886         }
887 
888         /* pci init */
889         chip->card = card;
890         chip->pci = pci;
891         chip->irq = -1;
892         spin_lock_init(&chip->reg_lock);
893 
894         chip->core = core;
895 
896         /* get irq */
897         err = request_irq(chip->pci->irq, cx8801_irq,
898                           IRQF_SHARED, chip->core->name, chip);
899         if (err < 0) {
900                 dprintk(0, "%s: can't get IRQ %d\n",
901                         chip->core->name, chip->pci->irq);
902                 return err;
903         }
904 
905         /* print pci info */
906         pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
907 
908         dprintk(1,
909                 "ALSA %s/%i: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
910                 core->name, devno,
911                 pci_name(pci), pci->revision, pci->irq,
912                 pci_lat, (unsigned long long)pci_resource_start(pci, 0));
913 
914         chip->irq = pci->irq;
915         synchronize_irq(chip->irq);
916 
917         *rchip = chip;
918         *core_ptr = core;
919 
920         return 0;
921 }
922 
923 static int cx88_audio_initdev(struct pci_dev *pci,
924                               const struct pci_device_id *pci_id)
925 {
926         struct snd_card         *card;
927         struct cx88_audio_dev   *chip;
928         struct cx88_core        *core = NULL;
929         int                     err;
930 
931         if (devno >= SNDRV_CARDS)
932                 return (-ENODEV);
933 
934         if (!enable[devno]) {
935                 ++devno;
936                 return (-ENOENT);
937         }
938 
939         err = snd_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
940                            sizeof(struct cx88_audio_dev), &card);
941         if (err < 0)
942                 return err;
943 
944         card->private_free = snd_cx88_dev_free;
945 
946         err = snd_cx88_create(card, pci, &chip, &core);
947         if (err < 0)
948                 goto error;
949 
950         err = snd_cx88_pcm(chip, 0, "CX88 Digital");
951         if (err < 0)
952                 goto error;
953 
954         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
955         if (err < 0)
956                 goto error;
957         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
958         if (err < 0)
959                 goto error;
960         err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
961         if (err < 0)
962                 goto error;
963 
964         /* If there's a wm8775 then add a Line-In ALC switch */
965         if (core->sd_wm8775)
966                 snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
967 
968         strcpy(card->driver, "CX88x");
969         sprintf(card->shortname, "Conexant CX%x", pci->device);
970         sprintf(card->longname, "%s at %#llx",
971                 card->shortname,
972                 (unsigned long long)pci_resource_start(pci, 0));
973         strcpy(card->mixername, "CX88");
974 
975         dprintk(0, "%s/%i: ALSA support for cx2388x boards\n",
976                 card->driver, devno);
977 
978         err = snd_card_register(card);
979         if (err < 0)
980                 goto error;
981         pci_set_drvdata(pci, card);
982 
983         devno++;
984         return 0;
985 
986 error:
987         snd_card_free(card);
988         return err;
989 }
990 
991 /*
992  * ALSA destructor
993  */
994 static void cx88_audio_finidev(struct pci_dev *pci)
995 {
996         struct snd_card *card = pci_get_drvdata(pci);
997 
998         snd_card_free(card);
999 
1000         devno--;
1001 }
1002 
1003 /*
1004  * PCI driver definition
1005  */
1006 
1007 static struct pci_driver cx88_audio_pci_driver = {
1008         .name     = "cx88_audio",
1009         .id_table = cx88_audio_pci_tbl,
1010         .probe    = cx88_audio_initdev,
1011         .remove   = cx88_audio_finidev,
1012 };
1013 
1014 module_pci_driver(cx88_audio_pci_driver);
1015 

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