linux/drivers/media/video/cx88/cx88-alsa.c
<<
>>
Prefs
   1/*
   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@infradead.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 *  This program is free software; you can redistribute it and/or modify
  13 *  it under the terms of the GNU General Public License as published by
  14 *  the Free Software Foundation; either version 2 of the License, or
  15 *  (at your option) any later version.
  16 *
  17 *  This program is distributed in the hope that it will be useful,
  18 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 *  GNU General Public License for more details.
  21 *
  22 *  You should have received a copy of the GNU General Public License
  23 *  along with this program; if not, write to the Free Software
  24 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/init.h>
  29#include <linux/device.h>
  30#include <linux/interrupt.h>
  31#include <linux/vmalloc.h>
  32#include <linux/dma-mapping.h>
  33#include <linux/pci.h>
  34#include <linux/slab.h>
  35
  36#include <asm/delay.h>
  37#include <sound/core.h>
  38#include <sound/pcm.h>
  39#include <sound/pcm_params.h>
  40#include <sound/control.h>
  41#include <sound/initval.h>
  42#include <sound/tlv.h>
  43#include <media/wm8775.h>
  44
  45#include "cx88.h"
  46#include "cx88-reg.h"
  47
  48#define dprintk(level,fmt, arg...)      if (debug >= level) \
  49        printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
  50
  51#define dprintk_core(level,fmt, arg...) if (debug >= level) \
  52        printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
  53
  54/****************************************************************************
  55        Data type declarations - Can be moded to a header file later
  56 ****************************************************************************/
  57
  58struct cx88_audio_buffer {
  59        unsigned int               bpl;
  60        struct btcx_riscmem        risc;
  61        struct videobuf_dmabuf     dma;
  62};
  63
  64struct cx88_audio_dev {
  65        struct cx88_core           *core;
  66        struct cx88_dmaqueue       q;
  67
  68        /* pci i/o */
  69        struct pci_dev             *pci;
  70
  71        /* audio controls */
  72        int                        irq;
  73
  74        struct snd_card            *card;
  75
  76        spinlock_t                 reg_lock;
  77        atomic_t                   count;
  78
  79        unsigned int               dma_size;
  80        unsigned int               period_size;
  81        unsigned int               num_periods;
  82
  83        struct videobuf_dmabuf     *dma_risc;
  84
  85        struct cx88_audio_buffer   *buf;
  86
  87        struct snd_pcm_substream   *substream;
  88};
  89typedef struct cx88_audio_dev snd_cx88_card_t;
  90
  91
  92
  93/****************************************************************************
  94                        Module global static vars
  95 ****************************************************************************/
  96
  97static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  98static const char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
  99static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
 100
 101module_param_array(enable, bool, NULL, 0444);
 102MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
 103
 104module_param_array(index, int, NULL, 0444);
 105MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
 106
 107
 108/****************************************************************************
 109                                Module macros
 110 ****************************************************************************/
 111
 112MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
 113MODULE_AUTHOR("Ricardo Cerqueira");
 114MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
 115MODULE_LICENSE("GPL");
 116MODULE_VERSION(CX88_VERSION);
 117
 118MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
 119                        "{{Conexant,23882},"
 120                        "{{Conexant,23883}");
 121static unsigned int debug;
 122module_param(debug,int,0644);
 123MODULE_PARM_DESC(debug,"enable debug messages");
 124
 125/****************************************************************************
 126                        Module specific funtions
 127 ****************************************************************************/
 128
 129/*
 130 * BOARD Specific: Sets audio DMA
 131 */
 132
 133static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 134{
 135        struct cx88_audio_buffer *buf = chip->buf;
 136        struct cx88_core *core=chip->core;
 137        const struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 138
 139        /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 140        cx_clear(MO_AUD_DMACNTRL, 0x11);
 141
 142        /* setup fifo + format - out channel */
 143        cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);
 144
 145        /* sets bpl size */
 146        cx_write(MO_AUDD_LNGTH, buf->bpl);
 147
 148        /* reset counter */
 149        cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 150        atomic_set(&chip->count, 0);
 151
 152        dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
 153                "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
 154                chip->num_periods, buf->bpl * chip->num_periods);
 155
 156        /* Enables corresponding bits at AUD_INT_STAT */
 157        cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 158                                AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 159
 160        /* Clean any pending interrupt bits already set */
 161        cx_write(MO_AUD_INTSTAT, ~0);
 162
 163        /* enable audio irqs */
 164        cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);
 165
 166        /* start dma */
 167        cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
 168        cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
 169
 170        if (debug)
 171                cx88_sram_channel_dump(chip->core, audio_ch);
 172
 173        return 0;
 174}
 175
 176/*
 177 * BOARD Specific: Resets audio DMA
 178 */
 179static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
 180{
 181        struct cx88_core *core=chip->core;
 182        dprintk(1, "Stopping audio DMA\n");
 183
 184        /* stop dma */
 185        cx_clear(MO_AUD_DMACNTRL, 0x11);
 186
 187        /* disable irqs */
 188        cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 189        cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 190                                AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 191
 192        if (debug)
 193                cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
 194
 195        return 0;
 196}
 197
 198#define MAX_IRQ_LOOP 50
 199
 200/*
 201 * BOARD Specific: IRQ dma bits
 202 */
 203static const char *cx88_aud_irqs[32] = {
 204        "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
 205        NULL,                                     /* reserved */
 206        "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
 207        NULL,                                     /* reserved */
 208        "dnf_of", "upf_uf", "rds_dnf_uf",         /* 8-10 */
 209        NULL,                                     /* reserved */
 210        "dn_sync", "up_sync", "rds_dn_sync",      /* 12-14 */
 211        NULL,                                     /* reserved */
 212        "opc_err", "par_err", "rip_err",          /* 16-18 */
 213        "pci_abort", "ber_irq", "mchg_irq"        /* 19-21 */
 214};
 215
 216/*
 217 * BOARD Specific: Threats IRQ audio specific calls
 218 */
 219static void cx8801_aud_irq(snd_cx88_card_t *chip)
 220{
 221        struct cx88_core *core = chip->core;
 222        u32 status, mask;
 223
 224        status = cx_read(MO_AUD_INTSTAT);
 225        mask   = cx_read(MO_AUD_INTMSK);
 226        if (0 == (status & mask))
 227                return;
 228        cx_write(MO_AUD_INTSTAT, status);
 229        if (debug > 1  ||  (status & mask & ~0xff))
 230                cx88_print_irqbits(core->name, "irq aud",
 231                                   cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
 232                                   status, mask);
 233        /* risc op code error */
 234        if (status & AUD_INT_OPC_ERR) {
 235                printk(KERN_WARNING "%s/1: Audio risc op code error\n",core->name);
 236                cx_clear(MO_AUD_DMACNTRL, 0x11);
 237                cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
 238        }
 239        if (status & AUD_INT_DN_SYNC) {
 240                dprintk(1, "Downstream sync error\n");
 241                cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
 242                return;
 243        }
 244        /* risc1 downstream */
 245        if (status & AUD_INT_DN_RISCI1) {
 246                atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
 247                snd_pcm_period_elapsed(chip->substream);
 248        }
 249        /* FIXME: Any other status should deserve a special handling? */
 250}
 251
 252/*
 253 * BOARD Specific: Handles IRQ calls
 254 */
 255static irqreturn_t cx8801_irq(int irq, void *dev_id)
 256{
 257        snd_cx88_card_t *chip = dev_id;
 258        struct cx88_core *core = chip->core;
 259        u32 status;
 260        int loop, handled = 0;
 261
 262        for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
 263                status = cx_read(MO_PCI_INTSTAT) &
 264                        (core->pci_irqmask | PCI_INT_AUDINT);
 265                if (0 == status)
 266                        goto out;
 267                dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
 268                        loop, MAX_IRQ_LOOP, status);
 269                handled = 1;
 270                cx_write(MO_PCI_INTSTAT, status);
 271
 272                if (status & core->pci_irqmask)
 273                        cx88_core_irq(core, status);
 274                if (status & PCI_INT_AUDINT)
 275                        cx8801_aud_irq(chip);
 276        }
 277
 278        if (MAX_IRQ_LOOP == loop) {
 279                printk(KERN_ERR
 280                       "%s/1: IRQ loop detected, disabling interrupts\n",
 281                       core->name);
 282                cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
 283        }
 284
 285 out:
 286        return IRQ_RETVAL(handled);
 287}
 288
 289
 290static int dsp_buffer_free(snd_cx88_card_t *chip)
 291{
 292        BUG_ON(!chip->dma_size);
 293
 294        dprintk(2,"Freeing buffer\n");
 295        videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
 296        videobuf_dma_free(chip->dma_risc);
 297        btcx_riscmem_free(chip->pci,&chip->buf->risc);
 298        kfree(chip->buf);
 299
 300        chip->dma_risc = NULL;
 301        chip->dma_size = 0;
 302
 303        return 0;
 304}
 305
 306/****************************************************************************
 307                                ALSA PCM Interface
 308 ****************************************************************************/
 309
 310/*
 311 * Digital hardware definition
 312 */
 313#define DEFAULT_FIFO_SIZE       4096
 314static const struct snd_pcm_hardware snd_cx88_digital_hw = {
 315        .info = SNDRV_PCM_INFO_MMAP |
 316                SNDRV_PCM_INFO_INTERLEAVED |
 317                SNDRV_PCM_INFO_BLOCK_TRANSFER |
 318                SNDRV_PCM_INFO_MMAP_VALID,
 319        .formats = SNDRV_PCM_FMTBIT_S16_LE,
 320
 321        .rates =                SNDRV_PCM_RATE_48000,
 322        .rate_min =             48000,
 323        .rate_max =             48000,
 324        .channels_min = 2,
 325        .channels_max = 2,
 326        /* Analog audio output will be full of clicks and pops if there
 327           are not exactly four lines in the SRAM FIFO buffer.  */
 328        .period_bytes_min = DEFAULT_FIFO_SIZE/4,
 329        .period_bytes_max = DEFAULT_FIFO_SIZE/4,
 330        .periods_min = 1,
 331        .periods_max = 1024,
 332        .buffer_bytes_max = (1024*1024),
 333};
 334
 335/*
 336 * audio pcm capture open callback
 337 */
 338static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
 339{
 340        snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 341        struct snd_pcm_runtime *runtime = substream->runtime;
 342        int err;
 343
 344        if (!chip) {
 345                printk(KERN_ERR "BUG: cx88 can't find device struct."
 346                                " Can't proceed with open\n");
 347                return -ENODEV;
 348        }
 349
 350        err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 351        if (err < 0)
 352                goto _error;
 353
 354        chip->substream = substream;
 355
 356        runtime->hw = snd_cx88_digital_hw;
 357
 358        if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
 359                unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
 360                bpl &= ~7; /* must be multiple of 8 */
 361                runtime->hw.period_bytes_min = bpl;
 362                runtime->hw.period_bytes_max = bpl;
 363        }
 364
 365        return 0;
 366_error:
 367        dprintk(1,"Error opening PCM!\n");
 368        return err;
 369}
 370
 371/*
 372 * audio close callback
 373 */
 374static int snd_cx88_close(struct snd_pcm_substream *substream)
 375{
 376        return 0;
 377}
 378
 379/*
 380 * hw_params callback
 381 */
 382static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
 383                              struct snd_pcm_hw_params * hw_params)
 384{
 385        snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 386        struct videobuf_dmabuf *dma;
 387
 388        struct cx88_audio_buffer *buf;
 389        int ret;
 390
 391        if (substream->runtime->dma_area) {
 392                dsp_buffer_free(chip);
 393                substream->runtime->dma_area = NULL;
 394        }
 395
 396        chip->period_size = params_period_bytes(hw_params);
 397        chip->num_periods = params_periods(hw_params);
 398        chip->dma_size = chip->period_size * params_periods(hw_params);
 399
 400        BUG_ON(!chip->dma_size);
 401        BUG_ON(chip->num_periods & (chip->num_periods-1));
 402
 403        buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 404        if (NULL == buf)
 405                return -ENOMEM;
 406
 407        buf->bpl = chip->period_size;
 408
 409        dma = &buf->dma;
 410        videobuf_dma_init(dma);
 411        ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 412                        (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
 413        if (ret < 0)
 414                goto error;
 415
 416        ret = videobuf_dma_map(&chip->pci->dev, dma);
 417        if (ret < 0)
 418                goto error;
 419
 420        ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
 421                                   chip->period_size, chip->num_periods, 1);
 422        if (ret < 0)
 423                goto error;
 424
 425        /* Loop back to start of program */
 426        buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
 427        buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 428
 429        chip->buf = buf;
 430        chip->dma_risc = dma;
 431
 432        substream->runtime->dma_area = chip->dma_risc->vaddr;
 433        substream->runtime->dma_bytes = chip->dma_size;
 434        substream->runtime->dma_addr = 0;
 435        return 0;
 436
 437error:
 438        kfree(buf);
 439        return ret;
 440}
 441
 442/*
 443 * hw free callback
 444 */
 445static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
 446{
 447
 448        snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 449
 450        if (substream->runtime->dma_area) {
 451                dsp_buffer_free(chip);
 452                substream->runtime->dma_area = NULL;
 453        }
 454
 455        return 0;
 456}
 457
 458/*
 459 * prepare callback
 460 */
 461static int snd_cx88_prepare(struct snd_pcm_substream *substream)
 462{
 463        return 0;
 464}
 465
 466/*
 467 * trigger callback
 468 */
 469static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
 470{
 471        snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 472        int err;
 473
 474        /* Local interrupts are already disabled by ALSA */
 475        spin_lock(&chip->reg_lock);
 476
 477        switch (cmd) {
 478        case SNDRV_PCM_TRIGGER_START:
 479                err=_cx88_start_audio_dma(chip);
 480                break;
 481        case SNDRV_PCM_TRIGGER_STOP:
 482                err=_cx88_stop_audio_dma(chip);
 483                break;
 484        default:
 485                err=-EINVAL;
 486                break;
 487        }
 488
 489        spin_unlock(&chip->reg_lock);
 490
 491        return err;
 492}
 493
 494/*
 495 * pointer callback
 496 */
 497static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
 498{
 499        snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
 500        struct snd_pcm_runtime *runtime = substream->runtime;
 501        u16 count;
 502
 503        count = atomic_read(&chip->count);
 504
 505//      dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __func__,
 506//              count, new, count & (runtime->periods-1),
 507//              runtime->period_size * (count & (runtime->periods-1)));
 508        return runtime->period_size * (count & (runtime->periods-1));
 509}
 510
 511/*
 512 * page callback (needed for mmap)
 513 */
 514static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
 515                                unsigned long offset)
 516{
 517        void *pageptr = substream->runtime->dma_area + offset;
 518        return vmalloc_to_page(pageptr);
 519}
 520
 521/*
 522 * operators
 523 */
 524static struct snd_pcm_ops snd_cx88_pcm_ops = {
 525        .open = snd_cx88_pcm_open,
 526        .close = snd_cx88_close,
 527        .ioctl = snd_pcm_lib_ioctl,
 528        .hw_params = snd_cx88_hw_params,
 529        .hw_free = snd_cx88_hw_free,
 530        .prepare = snd_cx88_prepare,
 531        .trigger = snd_cx88_card_trigger,
 532        .pointer = snd_cx88_pointer,
 533        .page = snd_cx88_page,
 534};
 535
 536/*
 537 * create a PCM device
 538 */
 539static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, const char *name)
 540{
 541        int err;
 542        struct snd_pcm *pcm;
 543
 544        err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 545        if (err < 0)
 546                return err;
 547        pcm->private_data = chip;
 548        strcpy(pcm->name, name);
 549        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
 550
 551        return 0;
 552}
 553
 554/****************************************************************************
 555                                CONTROL INTERFACE
 556 ****************************************************************************/
 557static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
 558                                struct snd_ctl_elem_info *info)
 559{
 560        info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 561        info->count = 2;
 562        info->value.integer.min = 0;
 563        info->value.integer.max = 0x3f;
 564
 565        return 0;
 566}
 567
 568static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
 569                               struct snd_ctl_elem_value *value)
 570{
 571        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 572        struct cx88_core *core=chip->core;
 573        int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
 574            bal = cx_read(AUD_BAL_CTL);
 575
 576        value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
 577        vol -= (bal & 0x3f);
 578        value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;
 579
 580        return 0;
 581}
 582
 583static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol,
 584                               struct snd_ctl_elem_value *value)
 585{
 586        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 587        struct cx88_core *core = chip->core;
 588        int left = value->value.integer.value[0];
 589        int right = value->value.integer.value[1];
 590        int v, b;
 591
 592        /* Pass volume & balance onto any WM8775 */
 593        if (left >= right) {
 594                v = left << 10;
 595                b = left ? (0x8000 * right) / left : 0x8000;
 596        } else {
 597                v = right << 10;
 598                b = right ? 0xffff - (0x8000 * left) / right : 0x8000;
 599        }
 600        wm8775_s_ctrl(core, V4L2_CID_AUDIO_VOLUME, v);
 601        wm8775_s_ctrl(core, V4L2_CID_AUDIO_BALANCE, b);
 602}
 603
 604/* OK - TODO: test it */
 605static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
 606                               struct snd_ctl_elem_value *value)
 607{
 608        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 609        struct cx88_core *core=chip->core;
 610        int left, right, v, b;
 611        int changed = 0;
 612        u32 old;
 613
 614        if (core->board.audio_chip == V4L2_IDENT_WM8775)
 615                snd_cx88_wm8775_volume_put(kcontrol, value);
 616
 617        left = value->value.integer.value[0] & 0x3f;
 618        right = value->value.integer.value[1] & 0x3f;
 619        b = right - left;
 620        if (b < 0) {
 621                v = 0x3f - left;
 622                b = (-b) | 0x40;
 623        } else {
 624                v = 0x3f - right;
 625        }
 626        /* Do we really know this will always be called with IRQs on? */
 627        spin_lock_irq(&chip->reg_lock);
 628        old = cx_read(AUD_VOL_CTL);
 629        if (v != (old & 0x3f)) {
 630                cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, (old & ~0x3f) | v);
 631                changed = 1;
 632        }
 633        if ((cx_read(AUD_BAL_CTL) & 0x7f) != b) {
 634                cx_write(AUD_BAL_CTL, b);
 635                changed = 1;
 636        }
 637        spin_unlock_irq(&chip->reg_lock);
 638
 639        return changed;
 640}
 641
 642static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);
 643
 644static const struct snd_kcontrol_new snd_cx88_volume = {
 645        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 646        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 647                  SNDRV_CTL_ELEM_ACCESS_TLV_READ,
 648        .name = "Analog-TV Volume",
 649        .info = snd_cx88_volume_info,
 650        .get = snd_cx88_volume_get,
 651        .put = snd_cx88_volume_put,
 652        .tlv.p = snd_cx88_db_scale,
 653};
 654
 655static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
 656                               struct snd_ctl_elem_value *value)
 657{
 658        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 659        struct cx88_core *core = chip->core;
 660        u32 bit = kcontrol->private_value;
 661
 662        value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
 663        return 0;
 664}
 665
 666static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
 667                                       struct snd_ctl_elem_value *value)
 668{
 669        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 670        struct cx88_core *core = chip->core;
 671        u32 bit = kcontrol->private_value;
 672        int ret = 0;
 673        u32 vol;
 674
 675        spin_lock_irq(&chip->reg_lock);
 676        vol = cx_read(AUD_VOL_CTL);
 677        if (value->value.integer.value[0] != !(vol & bit)) {
 678                vol ^= bit;
 679                cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, vol);
 680                /* Pass mute onto any WM8775 */
 681                if ((core->board.audio_chip == V4L2_IDENT_WM8775) &&
 682                    ((1<<6) == bit))
 683                        wm8775_s_ctrl(core, V4L2_CID_AUDIO_MUTE, 0 != (vol & bit));
 684                ret = 1;
 685        }
 686        spin_unlock_irq(&chip->reg_lock);
 687        return ret;
 688}
 689
 690static const struct snd_kcontrol_new snd_cx88_dac_switch = {
 691        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 692        .name = "Audio-Out Switch",
 693        .info = snd_ctl_boolean_mono_info,
 694        .get = snd_cx88_switch_get,
 695        .put = snd_cx88_switch_put,
 696        .private_value = (1<<8),
 697};
 698
 699static const struct snd_kcontrol_new snd_cx88_source_switch = {
 700        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 701        .name = "Analog-TV Switch",
 702        .info = snd_ctl_boolean_mono_info,
 703        .get = snd_cx88_switch_get,
 704        .put = snd_cx88_switch_put,
 705        .private_value = (1<<6),
 706};
 707
 708static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol,
 709                               struct snd_ctl_elem_value *value)
 710{
 711        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 712        struct cx88_core *core = chip->core;
 713        s32 val;
 714
 715        val = wm8775_g_ctrl(core, V4L2_CID_AUDIO_LOUDNESS);
 716        value->value.integer.value[0] = val ? 1 : 0;
 717        return 0;
 718}
 719
 720static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
 721                                       struct snd_ctl_elem_value *value)
 722{
 723        snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
 724        struct cx88_core *core = chip->core;
 725        struct v4l2_control client_ctl;
 726
 727        memset(&client_ctl, 0, sizeof(client_ctl));
 728        client_ctl.value = 0 != value->value.integer.value[0];
 729        client_ctl.id = V4L2_CID_AUDIO_LOUDNESS;
 730        call_hw(core, WM8775_GID, core, s_ctrl, &client_ctl);
 731
 732        return 0;
 733}
 734
 735static struct snd_kcontrol_new snd_cx88_alc_switch = {
 736        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 737        .name = "Line-In ALC Switch",
 738        .info = snd_ctl_boolean_mono_info,
 739        .get = snd_cx88_alc_get,
 740        .put = snd_cx88_alc_put,
 741};
 742
 743/****************************************************************************
 744                        Basic Flow for Sound Devices
 745 ****************************************************************************/
 746
 747/*
 748 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 749 * Only boards with eeprom and byte 1 at eeprom=1 have it
 750 */
 751
 752static const struct pci_device_id const cx88_audio_pci_tbl[] __devinitdata = {
 753        {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 754        {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
 755        {0, }
 756};
 757MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
 758
 759/*
 760 * Chip-specific destructor
 761 */
 762
 763static int snd_cx88_free(snd_cx88_card_t *chip)
 764{
 765
 766        if (chip->irq >= 0)
 767                free_irq(chip->irq, chip);
 768
 769        cx88_core_put(chip->core,chip->pci);
 770
 771        pci_disable_device(chip->pci);
 772        return 0;
 773}
 774
 775/*
 776 * Component Destructor
 777 */
 778static void snd_cx88_dev_free(struct snd_card * card)
 779{
 780        snd_cx88_card_t *chip = card->private_data;
 781
 782        snd_cx88_free(chip);
 783}
 784
 785
 786/*
 787 * Alsa Constructor - Component probe
 788 */
 789
 790static int devno;
 791static int __devinit snd_cx88_create(struct snd_card *card,
 792                                     struct pci_dev *pci,
 793                                     snd_cx88_card_t **rchip,
 794                                     struct cx88_core **core_ptr)
 795{
 796        snd_cx88_card_t   *chip;
 797        struct cx88_core  *core;
 798        int               err;
 799        unsigned char     pci_lat;
 800
 801        *rchip = NULL;
 802
 803        err = pci_enable_device(pci);
 804        if (err < 0)
 805                return err;
 806
 807        pci_set_master(pci);
 808
 809        chip = card->private_data;
 810
 811        core = cx88_core_get(pci);
 812        if (NULL == core) {
 813                err = -EINVAL;
 814                return err;
 815        }
 816
 817        if (!pci_dma_supported(pci,DMA_BIT_MASK(32))) {
 818                dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
 819                err = -EIO;
 820                cx88_core_put(core, pci);
 821                return err;
 822        }
 823
 824
 825        /* pci init */
 826        chip->card = card;
 827        chip->pci = pci;
 828        chip->irq = -1;
 829        spin_lock_init(&chip->reg_lock);
 830
 831        chip->core = core;
 832
 833        /* get irq */
 834        err = request_irq(chip->pci->irq, cx8801_irq,
 835                          IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
 836        if (err < 0) {
 837                dprintk(0, "%s: can't get IRQ %d\n",
 838                       chip->core->name, chip->pci->irq);
 839                return err;
 840        }
 841
 842        /* print pci info */
 843        pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);
 844
 845        dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
 846               "latency: %d, mmio: 0x%llx\n", core->name, devno,
 847               pci_name(pci), pci->revision, pci->irq,
 848               pci_lat, (unsigned long long)pci_resource_start(pci,0));
 849
 850        chip->irq = pci->irq;
 851        synchronize_irq(chip->irq);
 852
 853        snd_card_set_dev(card, &pci->dev);
 854
 855        *rchip = chip;
 856        *core_ptr = core;
 857
 858        return 0;
 859}
 860
 861static int __devinit cx88_audio_initdev(struct pci_dev *pci,
 862                                    const struct pci_device_id *pci_id)
 863{
 864        struct snd_card  *card;
 865        snd_cx88_card_t  *chip;
 866        struct cx88_core *core = NULL;
 867        int              err;
 868
 869        if (devno >= SNDRV_CARDS)
 870                return (-ENODEV);
 871
 872        if (!enable[devno]) {
 873                ++devno;
 874                return (-ENOENT);
 875        }
 876
 877        err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 878                              sizeof(snd_cx88_card_t), &card);
 879        if (err < 0)
 880                return err;
 881
 882        card->private_free = snd_cx88_dev_free;
 883
 884        err = snd_cx88_create(card, pci, &chip, &core);
 885        if (err < 0)
 886                goto error;
 887
 888        err = snd_cx88_pcm(chip, 0, "CX88 Digital");
 889        if (err < 0)
 890                goto error;
 891
 892        err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
 893        if (err < 0)
 894                goto error;
 895        err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
 896        if (err < 0)
 897                goto error;
 898        err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
 899        if (err < 0)
 900                goto error;
 901
 902        /* If there's a wm8775 then add a Line-In ALC switch */
 903        if (core->board.audio_chip == V4L2_IDENT_WM8775)
 904                snd_ctl_add(card, snd_ctl_new1(&snd_cx88_alc_switch, chip));
 905
 906        strcpy (card->driver, "CX88x");
 907        sprintf(card->shortname, "Conexant CX%x", pci->device);
 908        sprintf(card->longname, "%s at %#llx",
 909                card->shortname,(unsigned long long)pci_resource_start(pci, 0));
 910        strcpy (card->mixername, "CX88");
 911
 912        dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
 913               card->driver,devno);
 914
 915        err = snd_card_register(card);
 916        if (err < 0)
 917                goto error;
 918        pci_set_drvdata(pci,card);
 919
 920        devno++;
 921        return 0;
 922
 923error:
 924        snd_card_free(card);
 925        return err;
 926}
 927/*
 928 * ALSA destructor
 929 */
 930static void __devexit cx88_audio_finidev(struct pci_dev *pci)
 931{
 932        struct cx88_audio_dev *card = pci_get_drvdata(pci);
 933
 934        snd_card_free((void *)card);
 935
 936        pci_set_drvdata(pci, NULL);
 937
 938        devno--;
 939}
 940
 941/*
 942 * PCI driver definition
 943 */
 944
 945static struct pci_driver cx88_audio_pci_driver = {
 946        .name     = "cx88_audio",
 947        .id_table = cx88_audio_pci_tbl,
 948        .probe    = cx88_audio_initdev,
 949        .remove   = __devexit_p(cx88_audio_finidev),
 950};
 951
 952/****************************************************************************
 953                                LINUX MODULE INIT
 954 ****************************************************************************/
 955
 956/*
 957 * module init
 958 */
 959static int __init cx88_audio_init(void)
 960{
 961        printk(KERN_INFO "cx2388x alsa driver version %s loaded\n",
 962               CX88_VERSION);
 963        return pci_register_driver(&cx88_audio_pci_driver);
 964}
 965
 966/*
 967 * module remove
 968 */
 969static void __exit cx88_audio_fini(void)
 970{
 971        pci_unregister_driver(&cx88_audio_pci_driver);
 972}
 973
 974module_init(cx88_audio_init);
 975module_exit(cx88_audio_fini);
 976