sound/pci/cs5535audio/cs5535audio.c

   1 /*
   2  * Driver for audio on multifunction CS5535 companion device
   3  * Copyright (C) Jaya Kumar
   4  *
   5  * Based on Jaroslav Kysela and Takashi Iwai's examples.
   6  * This work was sponsored by CIS(M) Sdn Bhd.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  */
  23
  24 #include <sound/driver.h>
  25 #include <linux/delay.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/init.h>
  28 #include <linux/pci.h>
  29 #include <linux/slab.h>
  30 #include <linux/moduleparam.h>
  31 #include <asm/io.h>
  32 #include <sound/core.h>
  33 #include <sound/control.h>
  34 #include <sound/pcm.h>
  35 #include <sound/rawmidi.h>
  36 #include <sound/ac97_codec.h>
  37 #include <sound/initval.h>
  38 #include <sound/asoundef.h>
  39 #include "cs5535audio.h"
  40
  41 #define DRIVER_NAME "cs5535audio"
  42
  43
  44 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  45 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  46 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  47
  48 static struct pci_device_id snd_cs5535audio_ids[] = {
  49         { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO,
  50           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
  51         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
  52           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
  53         {}
  54 };
  55
  56 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
  57
  58 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
  59 {
  60         unsigned int tmp;
  61         do {
  62                 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
  63                 if (!(tmp & CMD_NEW))
  64                         break;
  65                 udelay(1);
  66         } while (--timeout);
  67         if (!timeout)
  68                 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
  69 }
  70
  71 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
  72                                                  unsigned short reg)
  73 {
  74         unsigned int regdata;
  75         unsigned int timeout;
  76         unsigned int val;
  77
  78         regdata = ((unsigned int) reg) << 24;
  79         regdata |= ACC_CODEC_CNTL_RD_CMD;
  80         regdata |= CMD_NEW;
  81
  82         cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
  83         wait_till_cmd_acked(cs5535au, 50);
  84
  85         timeout = 50;
  86         do {
  87                 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
  88                 if ((val & STS_NEW) && reg == (val >> 24))
  89                         break;
  90                 udelay(1);
  91         } while (--timeout);
  92         if (!timeout)
  93                 snd_printk(KERN_ERR "Failure reading cs5535 codec\n");
  94
  95         return (unsigned short) val;
  96 }
  97
  98 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
  99                                         unsigned short reg, unsigned short val)
 100 {
 101         unsigned int regdata;
 102
 103         regdata = ((unsigned int) reg) << 24;
 104         regdata |= val;
 105         regdata &= CMD_MASK;
 106         regdata |= CMD_NEW;
 107         regdata &= ACC_CODEC_CNTL_WR_CMD;
 108
 109         cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
 110         wait_till_cmd_acked(cs5535au, 50);
 111 }
 112
 113 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
 114                                              unsigned short reg, unsigned short val)
 115 {
 116         struct cs5535audio *cs5535au = ac97->private_data;
 117         snd_cs5535audio_codec_write(cs5535au, reg, val);
 118 }
 119
 120 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
 121                                                       unsigned short reg)
 122 {
 123         struct cs5535audio *cs5535au = ac97->private_data;
 124         return snd_cs5535audio_codec_read(cs5535au, reg);
 125 }
 126
 127 static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
 128 {
 129         struct snd_card *card = cs5535au->card;
 130         struct snd_ac97_bus *pbus;
 131         struct snd_ac97_template ac97;
 132         int err;
 133         static struct snd_ac97_bus_ops ops = {
 134                 .write = snd_cs5535audio_ac97_codec_write,
 135                 .read = snd_cs5535audio_ac97_codec_read,
 136         };
 137
 138         if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
 139                 return err;
 140
 141         memset(&ac97, 0, sizeof(ac97));
 142         ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
 143         ac97.private_data = cs5535au;
 144         ac97.pci = cs5535au->pci;
 145
 146         if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
 147                 snd_printk(KERN_ERR "mixer failed\n");
 148                 return err;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static void process_bm0_irq(struct cs5535audio *cs5535au)
 155 {
 156         u8 bm_stat;
 157         spin_lock(&cs5535au->reg_lock);
 158         bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
 159         spin_unlock(&cs5535au->reg_lock);
 160         if (bm_stat & EOP) {
 161                 struct cs5535audio_dma *dma;
 162                 dma = cs5535au->playback_substream->runtime->private_data;
 163                 snd_pcm_period_elapsed(cs5535au->playback_substream);
 164         } else {
 165                 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
 166                                         bm_stat);
 167         }
 168 }
 169
 170 static void process_bm1_irq(struct cs5535audio *cs5535au)
 171 {
 172         u8 bm_stat;
 173         spin_lock(&cs5535au->reg_lock);
 174         bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
 175         spin_unlock(&cs5535au->reg_lock);
 176         if (bm_stat & EOP) {
 177                 struct cs5535audio_dma *dma;
 178                 dma = cs5535au->capture_substream->runtime->private_data;
 179                 snd_pcm_period_elapsed(cs5535au->capture_substream);
 180         }
 181 }
 182
 183 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id,
 184                                              struct pt_regs *regs)
 185 {
 186         u16 acc_irq_stat;
 187         u8 bm_stat;
 188         unsigned char count;
 189         struct cs5535audio *cs5535au = dev_id;
 190
 191         if (cs5535au == NULL)
 192                 return IRQ_NONE;
 193
 194         acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
 195
 196         if (!acc_irq_stat)
 197                 return IRQ_NONE;
 198         for (count = 0; count < 10; count++) {
 199                 if (acc_irq_stat & (1 << count)) {
 200                         switch (count) {
 201                         case IRQ_STS:
 202                                 cs_readl(cs5535au, ACC_GPIO_STATUS);
 203                                 break;
 204                         case WU_IRQ_STS:
 205                                 cs_readl(cs5535au, ACC_GPIO_STATUS);
 206                                 break;
 207                         case BM0_IRQ_STS:
 208                                 process_bm0_irq(cs5535au);
 209                                 break;
 210                         case BM1_IRQ_STS:
 211                                 process_bm1_irq(cs5535au);
 212                                 break;
 213                         case BM2_IRQ_STS:
 214                                 bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS);
 215                                 break;
 216                         case BM3_IRQ_STS:
 217                                 bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS);
 218                                 break;
 219                         case BM4_IRQ_STS:
 220                                 bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS);
 221                                 break;
 222                         case BM5_IRQ_STS:
 223                                 bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS);
 224                                 break;
 225                         case BM6_IRQ_STS:
 226                                 bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS);
 227                                 break;
 228                         case BM7_IRQ_STS:
 229                                 bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS);
 230                                 break;
 231                         default:
 232                                 snd_printk(KERN_ERR "Unexpected irq src\n");
 233                                 break;
 234                         }
 235                 }
 236         }
 237         return IRQ_HANDLED;
 238 }
 239
 240 static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
 241 {
 242         synchronize_irq(cs5535au->irq);
 243         pci_set_power_state(cs5535au->pci, 3);
 244
 245         if (cs5535au->irq >= 0)
 246                 free_irq(cs5535au->irq, cs5535au);
 247
 248         pci_release_regions(cs5535au->pci);
 249         pci_disable_device(cs5535au->pci);
 250         kfree(cs5535au);
 251         return 0;
 252 }
 253
 254 static int snd_cs5535audio_dev_free(struct snd_device *device)
 255 {
 256         struct cs5535audio *cs5535au = device->device_data;
 257         return snd_cs5535audio_free(cs5535au);
 258 }
 259
 260 static int __devinit snd_cs5535audio_create(struct snd_card *card,
 261                                             struct pci_dev *pci,
 262                                             struct cs5535audio **rcs5535au)
 263 {
 264         struct cs5535audio *cs5535au;
 265
 266         int err;
 267         static struct snd_device_ops ops = {
 268                 .dev_free =     snd_cs5535audio_dev_free,
 269         };
 270
 271         *rcs5535au = NULL;
 272         if ((err = pci_enable_device(pci)) < 0)
 273                 return err;
 274
 275         if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
 276             pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
 277                 printk(KERN_WARNING "unable to get 32bit dma\n");
 278                 err = -ENXIO;
 279                 goto pcifail;
 280         }
 281
 282         cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
 283         if (cs5535au == NULL) {
 284                 err = -ENOMEM;
 285                 goto pcifail;
 286         }
 287
 288         spin_lock_init(&cs5535au->reg_lock);
 289         cs5535au->card = card;
 290         cs5535au->pci = pci;
 291         cs5535au->irq = -1;
 292
 293         if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
 294                 kfree(cs5535au);
 295                 goto pcifail;
 296         }
 297
 298         cs5535au->port = pci_resource_start(pci, 0);
 299
 300         if (request_irq(pci->irq, snd_cs5535audio_interrupt,
 301                         SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", cs5535au)) {
 302                 snd_printk("unable to grab IRQ %d\n", pci->irq);
 303                 err = -EBUSY;
 304                 goto sndfail;
 305         }
 306
 307         cs5535au->irq = pci->irq;
 308         pci_set_master(pci);
 309
 310         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 311                                   cs5535au, &ops)) < 0)
 312                 goto sndfail;
 313
 314         snd_card_set_dev(card, &pci->dev);
 315
 316         *rcs5535au = cs5535au;
 317         return 0;
 318
 319 sndfail: /* leave the device alive, just kill the snd */
 320         snd_cs5535audio_free(cs5535au);
 321         return err;
 322
 323 pcifail:
 324         pci_disable_device(pci);
 325         return err;
 326 }
 327
 328 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
 329                                            const struct pci_device_id *pci_id)
 330 {
 331         static int dev;
 332         struct snd_card *card;
 333         struct cs5535audio *cs5535au;
 334         int err;
 335
 336         if (dev >= SNDRV_CARDS)
 337                 return -ENODEV;
 338         if (!enable[dev]) {
 339                 dev++;
 340                 return -ENOENT;
 341         }
 342
 343         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 344         if (card == NULL)
 345                 return -ENOMEM;
 346
 347         if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
 348                 goto probefail_out;
 349
 350         if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
 351                 goto probefail_out;
 352
 353         if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
 354                 goto probefail_out;
 355
 356         strcpy(card->driver, DRIVER_NAME);
 357
 358         strcpy(card->shortname, "CS5535 Audio");
 359         sprintf(card->longname, "%s %s at 0x%lx, irq %i",
 360                 card->shortname, card->driver,
 361                 cs5535au->port, cs5535au->irq);
 362
 363         if ((err = snd_card_register(card)) < 0)
 364                 goto probefail_out;
 365
 366         pci_set_drvdata(pci, card);
 367         dev++;
 368         return 0;
 369
 370 probefail_out:
 371         snd_card_free(card);
 372         return err;
 373 }
 374
 375 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
 376 {
 377         snd_card_free(pci_get_drvdata(pci));
 378         pci_set_drvdata(pci, NULL);
 379 }
 380
 381 static struct pci_driver driver = {
 382         .name = DRIVER_NAME,
 383         .id_table = snd_cs5535audio_ids,
 384         .probe = snd_cs5535audio_probe,
 385         .remove = __devexit_p(snd_cs5535audio_remove),
 386 };
 387
 388 static int __init alsa_card_cs5535audio_init(void)
 389 {
 390         return pci_register_driver(&driver);
 391 }
 392
 393 static void __exit alsa_card_cs5535audio_exit(void)
 394 {
 395         pci_unregister_driver(&driver);
 396 }
 397
 398 module_init(alsa_card_cs5535audio_init)
 399 module_exit(alsa_card_cs5535audio_exit)
 400
 401 MODULE_AUTHOR("Jaya Kumar");
 402 MODULE_LICENSE("GPL");
 403 MODULE_DESCRIPTION("CS5535 Audio");
 404 MODULE_SUPPORTED_DEVICE("CS5535 Audio");