linux/sound/sh/aica.c
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   1/*
   2* This code is licenced under 
   3* the General Public Licence
   4* version 2
   5*
   6* Copyright Adrian McMenamin 2005, 2006, 2007
   7* <adrian@mcmen.demon.co.uk>
   8* Requires firmware (BSD licenced) available from:
   9* http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/
  10* or the maintainer
  11*
  12* This program is free software; you can redistribute it and/or modify
  13* it under the terms of version 2 of the GNU General Public License as published by
  14* the Free Software Foundation.
  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* You should have received a copy of the GNU General Public License
  22* along with this program; if not, write to the Free Software
  23* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24*
  25*/
  26
  27#include <linux/init.h>
  28#include <linux/jiffies.h>
  29#include <linux/slab.h>
  30#include <linux/time.h>
  31#include <linux/wait.h>
  32#include <linux/module.h>
  33#include <linux/platform_device.h>
  34#include <linux/firmware.h>
  35#include <linux/timer.h>
  36#include <linux/delay.h>
  37#include <linux/workqueue.h>
  38#include <linux/io.h>
  39#include <sound/core.h>
  40#include <sound/control.h>
  41#include <sound/pcm.h>
  42#include <sound/initval.h>
  43#include <sound/info.h>
  44#include <asm/dma.h>
  45#include <mach/sysasic.h>
  46#include "aica.h"
  47
  48MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
  49MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver");
  50MODULE_LICENSE("GPL");
  51MODULE_SUPPORTED_DEVICE("{{Yamaha/SEGA, AICA}}");
  52MODULE_FIRMWARE("aica_firmware.bin");
  53
  54/* module parameters */
  55#define CARD_NAME "AICA"
  56static int index = -1;
  57static char *id;
  58static bool enable = 1;
  59module_param(index, int, 0444);
  60MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
  61module_param(id, charp, 0444);
  62MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
  63module_param(enable, bool, 0644);
  64MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
  65
  66/* Simple platform device */
  67static struct platform_device *pd;
  68static struct resource aica_memory_space[2] = {
  69        {
  70         .name = "AICA ARM CONTROL",
  71         .start = ARM_RESET_REGISTER,
  72         .flags = IORESOURCE_MEM,
  73         .end = ARM_RESET_REGISTER + 3,
  74         },
  75        {
  76         .name = "AICA Sound RAM",
  77         .start = SPU_MEMORY_BASE,
  78         .flags = IORESOURCE_MEM,
  79         .end = SPU_MEMORY_BASE + 0x200000 - 1,
  80         },
  81};
  82
  83/* SPU specific functions */
  84/* spu_write_wait - wait for G2-SH FIFO to clear */
  85static void spu_write_wait(void)
  86{
  87        int time_count;
  88        time_count = 0;
  89        while (1) {
  90                if (!(readl(G2_FIFO) & 0x11))
  91                        break;
  92                /* To ensure hardware failure doesn't wedge kernel */
  93                time_count++;
  94                if (time_count > 0x10000) {
  95                        snd_printk
  96                            ("WARNING: G2 FIFO appears to be blocked.\n");
  97                        break;
  98                }
  99        }
 100}
 101
 102/* spu_memset - write to memory in SPU address space */
 103static void spu_memset(u32 toi, u32 what, int length)
 104{
 105        int i;
 106        unsigned long flags;
 107        if (snd_BUG_ON(length % 4))
 108                return;
 109        for (i = 0; i < length; i++) {
 110                if (!(i % 8))
 111                        spu_write_wait();
 112                local_irq_save(flags);
 113                writel(what, toi + SPU_MEMORY_BASE);
 114                local_irq_restore(flags);
 115                toi++;
 116        }
 117}
 118
 119/* spu_memload - write to SPU address space */
 120static void spu_memload(u32 toi, void *from, int length)
 121{
 122        unsigned long flags;
 123        u32 *froml = from;
 124        u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
 125        int i;
 126        u32 val;
 127        length = DIV_ROUND_UP(length, 4);
 128        spu_write_wait();
 129        for (i = 0; i < length; i++) {
 130                if (!(i % 8))
 131                        spu_write_wait();
 132                val = *froml;
 133                local_irq_save(flags);
 134                writel(val, to);
 135                local_irq_restore(flags);
 136                froml++;
 137                to++;
 138        }
 139}
 140
 141/* spu_disable - set spu registers to stop sound output */
 142static void spu_disable(void)
 143{
 144        int i;
 145        unsigned long flags;
 146        u32 regval;
 147        spu_write_wait();
 148        regval = readl(ARM_RESET_REGISTER);
 149        regval |= 1;
 150        spu_write_wait();
 151        local_irq_save(flags);
 152        writel(regval, ARM_RESET_REGISTER);
 153        local_irq_restore(flags);
 154        for (i = 0; i < 64; i++) {
 155                spu_write_wait();
 156                regval = readl(SPU_REGISTER_BASE + (i * 0x80));
 157                regval = (regval & ~0x4000) | 0x8000;
 158                spu_write_wait();
 159                local_irq_save(flags);
 160                writel(regval, SPU_REGISTER_BASE + (i * 0x80));
 161                local_irq_restore(flags);
 162        }
 163}
 164
 165/* spu_enable - set spu registers to enable sound output */
 166static void spu_enable(void)
 167{
 168        unsigned long flags;
 169        u32 regval = readl(ARM_RESET_REGISTER);
 170        regval &= ~1;
 171        spu_write_wait();
 172        local_irq_save(flags);
 173        writel(regval, ARM_RESET_REGISTER);
 174        local_irq_restore(flags);
 175}
 176
 177/* 
 178 * Halt the sound processor, clear the memory,
 179 * load some default ARM7 code, and then restart ARM7
 180*/
 181static void spu_reset(void)
 182{
 183        unsigned long flags;
 184        spu_disable();
 185        spu_memset(0, 0, 0x200000 / 4);
 186        /* Put ARM7 in endless loop */
 187        local_irq_save(flags);
 188        __raw_writel(0xea000002, SPU_MEMORY_BASE);
 189        local_irq_restore(flags);
 190        spu_enable();
 191}
 192
 193/* aica_chn_start - write to spu to start playback */
 194static void aica_chn_start(void)
 195{
 196        unsigned long flags;
 197        spu_write_wait();
 198        local_irq_save(flags);
 199        writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
 200        local_irq_restore(flags);
 201}
 202
 203/* aica_chn_halt - write to spu to halt playback */
 204static void aica_chn_halt(void)
 205{
 206        unsigned long flags;
 207        spu_write_wait();
 208        local_irq_save(flags);
 209        writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
 210        local_irq_restore(flags);
 211}
 212
 213/* ALSA code below */
 214static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
 215        .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
 216        .formats =
 217            (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
 218             SNDRV_PCM_FMTBIT_IMA_ADPCM),
 219        .rates = SNDRV_PCM_RATE_8000_48000,
 220        .rate_min = 8000,
 221        .rate_max = 48000,
 222        .channels_min = 1,
 223        .channels_max = 2,
 224        .buffer_bytes_max = AICA_BUFFER_SIZE,
 225        .period_bytes_min = AICA_PERIOD_SIZE,
 226        .period_bytes_max = AICA_PERIOD_SIZE,
 227        .periods_min = AICA_PERIOD_NUMBER,
 228        .periods_max = AICA_PERIOD_NUMBER,
 229};
 230
 231static int aica_dma_transfer(int channels, int buffer_size,
 232                             struct snd_pcm_substream *substream)
 233{
 234        int q, err, period_offset;
 235        struct snd_card_aica *dreamcastcard;
 236        struct snd_pcm_runtime *runtime;
 237        unsigned long flags;
 238        err = 0;
 239        dreamcastcard = substream->pcm->private_data;
 240        period_offset = dreamcastcard->clicks;
 241        period_offset %= (AICA_PERIOD_NUMBER / channels);
 242        runtime = substream->runtime;
 243        for (q = 0; q < channels; q++) {
 244                local_irq_save(flags);
 245                err = dma_xfer(AICA_DMA_CHANNEL,
 246                               (unsigned long) (runtime->dma_area +
 247                                                (AICA_BUFFER_SIZE * q) /
 248                                                channels +
 249                                                AICA_PERIOD_SIZE *
 250                                                period_offset),
 251                               AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
 252                               AICA_PERIOD_SIZE * period_offset,
 253                               buffer_size / channels, AICA_DMA_MODE);
 254                if (unlikely(err < 0)) {
 255                        local_irq_restore(flags);
 256                        break;
 257                }
 258                dma_wait_for_completion(AICA_DMA_CHANNEL);
 259                local_irq_restore(flags);
 260        }
 261        return err;
 262}
 263
 264static void startup_aica(struct snd_card_aica *dreamcastcard)
 265{
 266        spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
 267                    dreamcastcard->channel, sizeof(struct aica_channel));
 268        aica_chn_start();
 269}
 270
 271static void run_spu_dma(struct work_struct *work)
 272{
 273        int buffer_size;
 274        struct snd_pcm_runtime *runtime;
 275        struct snd_card_aica *dreamcastcard;
 276        dreamcastcard =
 277            container_of(work, struct snd_card_aica, spu_dma_work);
 278        runtime = dreamcastcard->substream->runtime;
 279        if (unlikely(dreamcastcard->dma_check == 0)) {
 280                buffer_size =
 281                    frames_to_bytes(runtime, runtime->buffer_size);
 282                if (runtime->channels > 1)
 283                        dreamcastcard->channel->flags |= 0x01;
 284                aica_dma_transfer(runtime->channels, buffer_size,
 285                                  dreamcastcard->substream);
 286                startup_aica(dreamcastcard);
 287                dreamcastcard->clicks =
 288                    buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
 289                return;
 290        } else {
 291                aica_dma_transfer(runtime->channels,
 292                                  AICA_PERIOD_SIZE * runtime->channels,
 293                                  dreamcastcard->substream);
 294                snd_pcm_period_elapsed(dreamcastcard->substream);
 295                dreamcastcard->clicks++;
 296                if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
 297                        dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
 298                mod_timer(&dreamcastcard->timer, jiffies + 1);
 299        }
 300}
 301
 302static void aica_period_elapsed(unsigned long timer_var)
 303{
 304        /*timer function - so cannot sleep */
 305        int play_period;
 306        struct snd_pcm_runtime *runtime;
 307        struct snd_pcm_substream *substream;
 308        struct snd_card_aica *dreamcastcard;
 309        substream = (struct snd_pcm_substream *) timer_var;
 310        runtime = substream->runtime;
 311        dreamcastcard = substream->pcm->private_data;
 312        /* Have we played out an additional period? */
 313        play_period =
 314            frames_to_bytes(runtime,
 315                            readl
 316                            (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) /
 317            AICA_PERIOD_SIZE;
 318        if (play_period == dreamcastcard->current_period) {
 319                /* reschedule the timer */
 320                mod_timer(&(dreamcastcard->timer), jiffies + 1);
 321                return;
 322        }
 323        if (runtime->channels > 1)
 324                dreamcastcard->current_period = play_period;
 325        if (unlikely(dreamcastcard->dma_check == 0))
 326                dreamcastcard->dma_check = 1;
 327        schedule_work(&(dreamcastcard->spu_dma_work));
 328}
 329
 330static void spu_begin_dma(struct snd_pcm_substream *substream)
 331{
 332        struct snd_card_aica *dreamcastcard;
 333        struct snd_pcm_runtime *runtime;
 334        runtime = substream->runtime;
 335        dreamcastcard = substream->pcm->private_data;
 336        /*get the queue to do the work */
 337        schedule_work(&(dreamcastcard->spu_dma_work));
 338        /* Timer may already be running */
 339        if (unlikely(dreamcastcard->timer.data)) {
 340                mod_timer(&dreamcastcard->timer, jiffies + 4);
 341                return;
 342        }
 343        setup_timer(&dreamcastcard->timer, aica_period_elapsed,
 344                    (unsigned long) substream);
 345        mod_timer(&dreamcastcard->timer, jiffies + 4);
 346}
 347
 348static int snd_aicapcm_pcm_open(struct snd_pcm_substream
 349                                *substream)
 350{
 351        struct snd_pcm_runtime *runtime;
 352        struct aica_channel *channel;
 353        struct snd_card_aica *dreamcastcard;
 354        if (!enable)
 355                return -ENOENT;
 356        dreamcastcard = substream->pcm->private_data;
 357        channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
 358        if (!channel)
 359                return -ENOMEM;
 360        /* set defaults for channel */
 361        channel->sfmt = SM_8BIT;
 362        channel->cmd = AICA_CMD_START;
 363        channel->vol = dreamcastcard->master_volume;
 364        channel->pan = 0x80;
 365        channel->pos = 0;
 366        channel->flags = 0;     /* default to mono */
 367        dreamcastcard->channel = channel;
 368        runtime = substream->runtime;
 369        runtime->hw = snd_pcm_aica_playback_hw;
 370        spu_enable();
 371        dreamcastcard->clicks = 0;
 372        dreamcastcard->current_period = 0;
 373        dreamcastcard->dma_check = 0;
 374        return 0;
 375}
 376
 377static int snd_aicapcm_pcm_close(struct snd_pcm_substream
 378                                 *substream)
 379{
 380        struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
 381        flush_work(&(dreamcastcard->spu_dma_work));
 382        if (dreamcastcard->timer.data)
 383                del_timer(&dreamcastcard->timer);
 384        kfree(dreamcastcard->channel);
 385        spu_disable();
 386        return 0;
 387}
 388
 389static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream
 390                                   *substream)
 391{
 392        /* Free the DMA buffer */
 393        return snd_pcm_lib_free_pages(substream);
 394}
 395
 396static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream
 397                                     *substream, struct snd_pcm_hw_params
 398                                     *hw_params)
 399{
 400        /* Allocate a DMA buffer using ALSA built-ins */
 401        return
 402            snd_pcm_lib_malloc_pages(substream,
 403                                     params_buffer_bytes(hw_params));
 404}
 405
 406static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
 407                                   *substream)
 408{
 409        struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
 410        if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE)
 411                dreamcastcard->channel->sfmt = SM_16BIT;
 412        dreamcastcard->channel->freq = substream->runtime->rate;
 413        dreamcastcard->substream = substream;
 414        return 0;
 415}
 416
 417static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
 418                                   *substream, int cmd)
 419{
 420        switch (cmd) {
 421        case SNDRV_PCM_TRIGGER_START:
 422                spu_begin_dma(substream);
 423                break;
 424        case SNDRV_PCM_TRIGGER_STOP:
 425                aica_chn_halt();
 426                break;
 427        default:
 428                return -EINVAL;
 429        }
 430        return 0;
 431}
 432
 433static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
 434                                             *substream)
 435{
 436        return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
 437}
 438
 439static struct snd_pcm_ops snd_aicapcm_playback_ops = {
 440        .open = snd_aicapcm_pcm_open,
 441        .close = snd_aicapcm_pcm_close,
 442        .ioctl = snd_pcm_lib_ioctl,
 443        .hw_params = snd_aicapcm_pcm_hw_params,
 444        .hw_free = snd_aicapcm_pcm_hw_free,
 445        .prepare = snd_aicapcm_pcm_prepare,
 446        .trigger = snd_aicapcm_pcm_trigger,
 447        .pointer = snd_aicapcm_pcm_pointer,
 448};
 449
 450/* TO DO: set up to handle more than one pcm instance */
 451static int __init snd_aicapcmchip(struct snd_card_aica
 452                                  *dreamcastcard, int pcm_index)
 453{
 454        struct snd_pcm *pcm;
 455        int err;
 456        /* AICA has no capture ability */
 457        err =
 458            snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
 459                        &pcm);
 460        if (unlikely(err < 0))
 461                return err;
 462        pcm->private_data = dreamcastcard;
 463        strcpy(pcm->name, "AICA PCM");
 464        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 465                        &snd_aicapcm_playback_ops);
 466        /* Allocate the DMA buffers */
 467        err =
 468            snd_pcm_lib_preallocate_pages_for_all(pcm,
 469                                                  SNDRV_DMA_TYPE_CONTINUOUS,
 470                                                  snd_dma_continuous_data
 471                                                  (GFP_KERNEL),
 472                                                  AICA_BUFFER_SIZE,
 473                                                  AICA_BUFFER_SIZE);
 474        return err;
 475}
 476
 477/* Mixer controls */
 478#define aica_pcmswitch_info             snd_ctl_boolean_mono_info
 479
 480static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
 481                              struct snd_ctl_elem_value *ucontrol)
 482{
 483        ucontrol->value.integer.value[0] = 1;   /* TO DO: Fix me */
 484        return 0;
 485}
 486
 487static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol,
 488                              struct snd_ctl_elem_value *ucontrol)
 489{
 490        if (ucontrol->value.integer.value[0] == 1)
 491                return 0;       /* TO DO: Fix me */
 492        else
 493                aica_chn_halt();
 494        return 0;
 495}
 496
 497static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol,
 498                               struct snd_ctl_elem_info *uinfo)
 499{
 500        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 501        uinfo->count = 1;
 502        uinfo->value.integer.min = 0;
 503        uinfo->value.integer.max = 0xFF;
 504        return 0;
 505}
 506
 507static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol,
 508                              struct snd_ctl_elem_value *ucontrol)
 509{
 510        struct snd_card_aica *dreamcastcard;
 511        dreamcastcard = kcontrol->private_data;
 512        if (unlikely(!dreamcastcard->channel))
 513                return -ETXTBSY;        /* we've not yet been set up */
 514        ucontrol->value.integer.value[0] = dreamcastcard->channel->vol;
 515        return 0;
 516}
 517
 518static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
 519                              struct snd_ctl_elem_value *ucontrol)
 520{
 521        struct snd_card_aica *dreamcastcard;
 522        unsigned int vol;
 523        dreamcastcard = kcontrol->private_data;
 524        if (unlikely(!dreamcastcard->channel))
 525                return -ETXTBSY;
 526        vol = ucontrol->value.integer.value[0];
 527        if (vol > 0xff)
 528                return -EINVAL;
 529        if (unlikely(dreamcastcard->channel->vol == vol))
 530                return 0;
 531        dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
 532        dreamcastcard->master_volume = ucontrol->value.integer.value[0];
 533        spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
 534                    dreamcastcard->channel, sizeof(struct aica_channel));
 535        return 1;
 536}
 537
 538static struct snd_kcontrol_new snd_aica_pcmswitch_control = {
 539        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 540        .name = "PCM Playback Switch",
 541        .index = 0,
 542        .info = aica_pcmswitch_info,
 543        .get = aica_pcmswitch_get,
 544        .put = aica_pcmswitch_put
 545};
 546
 547static struct snd_kcontrol_new snd_aica_pcmvolume_control = {
 548        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 549        .name = "PCM Playback Volume",
 550        .index = 0,
 551        .info = aica_pcmvolume_info,
 552        .get = aica_pcmvolume_get,
 553        .put = aica_pcmvolume_put
 554};
 555
 556static int load_aica_firmware(void)
 557{
 558        int err;
 559        const struct firmware *fw_entry;
 560        spu_reset();
 561        err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
 562        if (unlikely(err))
 563                return err;
 564        /* write firmware into memory */
 565        spu_disable();
 566        spu_memload(0, fw_entry->data, fw_entry->size);
 567        spu_enable();
 568        release_firmware(fw_entry);
 569        return err;
 570}
 571
 572static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard)
 573{
 574        int err;
 575        err = snd_ctl_add
 576            (dreamcastcard->card,
 577             snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
 578        if (unlikely(err < 0))
 579                return err;
 580        err = snd_ctl_add
 581            (dreamcastcard->card,
 582             snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
 583        if (unlikely(err < 0))
 584                return err;
 585        return 0;
 586}
 587
 588static int snd_aica_remove(struct platform_device *devptr)
 589{
 590        struct snd_card_aica *dreamcastcard;
 591        dreamcastcard = platform_get_drvdata(devptr);
 592        if (unlikely(!dreamcastcard))
 593                return -ENODEV;
 594        snd_card_free(dreamcastcard->card);
 595        kfree(dreamcastcard);
 596        return 0;
 597}
 598
 599static int snd_aica_probe(struct platform_device *devptr)
 600{
 601        int err;
 602        struct snd_card_aica *dreamcastcard;
 603        dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
 604        if (unlikely(!dreamcastcard))
 605                return -ENOMEM;
 606        err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER,
 607                           THIS_MODULE, 0, &dreamcastcard->card);
 608        if (unlikely(err < 0)) {
 609                kfree(dreamcastcard);
 610                return err;
 611        }
 612        strcpy(dreamcastcard->card->driver, "snd_aica");
 613        strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
 614        strcpy(dreamcastcard->card->longname,
 615               "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
 616        /* Prepare to use the queue */
 617        INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
 618        /* Load the PCM 'chip' */
 619        err = snd_aicapcmchip(dreamcastcard, 0);
 620        if (unlikely(err < 0))
 621                goto freedreamcast;
 622        dreamcastcard->timer.data = 0;
 623        dreamcastcard->channel = NULL;
 624        /* Add basic controls */
 625        err = add_aicamixer_controls(dreamcastcard);
 626        if (unlikely(err < 0))
 627                goto freedreamcast;
 628        /* Register the card with ALSA subsystem */
 629        err = snd_card_register(dreamcastcard->card);
 630        if (unlikely(err < 0))
 631                goto freedreamcast;
 632        platform_set_drvdata(devptr, dreamcastcard);
 633        snd_printk
 634            ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
 635        return 0;
 636      freedreamcast:
 637        snd_card_free(dreamcastcard->card);
 638        kfree(dreamcastcard);
 639        return err;
 640}
 641
 642static struct platform_driver snd_aica_driver = {
 643        .probe = snd_aica_probe,
 644        .remove = snd_aica_remove,
 645        .driver = {
 646                .name = SND_AICA_DRIVER,
 647        },
 648};
 649
 650static int __init aica_init(void)
 651{
 652        int err;
 653        err = platform_driver_register(&snd_aica_driver);
 654        if (unlikely(err < 0))
 655                return err;
 656        pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
 657                                             aica_memory_space, 2);
 658        if (IS_ERR(pd)) {
 659                platform_driver_unregister(&snd_aica_driver);
 660                return PTR_ERR(pd);
 661        }
 662        /* Load the firmware */
 663        return load_aica_firmware();
 664}
 665
 666static void __exit aica_exit(void)
 667{
 668        platform_device_unregister(pd);
 669        platform_driver_unregister(&snd_aica_driver);
 670        /* Kill any sound still playing and reset ARM7 to safe state */
 671        spu_reset();
 672}
 673
 674module_init(aica_init);
 675module_exit(aica_exit);
 676