sound/pci/cs5530.c

   1 /*
   2  * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
   3  *
   4  *      (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
   5  *      (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
   6  *
   7  * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
   8  * mess with it a bit. The chip seems to have to have trouble with full duplex
   9  * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
  10  * simultaneously play back audio at 16bit 44100kHz, the device actually plays
  11  * back in the same format in which it is capturing. By forcing the chip to
  12  * always play/capture in 16/44100, we can let alsa-lib convert the samples and
  13  * that way we can hack up some full duplex audio.
  14  *
  15  * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
  16  * The older version (VSA1) provides fairly good soundblaster emulation
  17  * although there are a couple of bugs: large DMA buffers break record,
  18  * and the MPU event handling seems suspect. VSA2 allows the native driver
  19  * to control the AC97 audio engine directly and requires a different driver.
  20  *
  21  * Thanks to National Semiconductor for providing the needed information
  22  * on the XpressAudio(tm) internals.
  23  *
  24  * This program is free software; you can redistribute it and/or modify it
  25  * under the terms of the GNU General Public License as published by the
  26  * Free Software Foundation; either version 2, or (at your option) any
  27  * later version.
  28  *
  29  * This program is distributed in the hope that it will be useful, but
  30  * WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  32  * General Public License for more details.
  33  *
  34  * TO DO:
  35  *      Investigate whether we can portably support Cognac (5520) in the
  36  *      same manner.
  37  */
  38
  39 #include <linux/delay.h>
  40 #include <linux/moduleparam.h>
  41 #include <linux/pci.h>
  42 #include <linux/slab.h>
  43 #include <sound/core.h>
  44 #include <sound/sb.h>
  45 #include <sound/initval.h>
  46
  47 MODULE_AUTHOR("Ash Willis");
  48 MODULE_DESCRIPTION("CS5530 Audio");
  49 MODULE_LICENSE("GPL");
  50
  51 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  52 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  53 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  54
  55 struct snd_cs5530 {
  56         struct snd_card *card;
  57         struct pci_dev *pci;
  58         struct snd_sb *sb;
  59         unsigned long pci_base;
  60 };
  61
  62 static DEFINE_PCI_DEVICE_TABLE(snd_cs5530_ids) = {
  63         {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
  64                                                         PCI_ANY_ID, 0, 0},
  65         {0,}
  66 };
  67
  68 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
  69
  70 static int snd_cs5530_free(struct snd_cs5530 *chip)
  71 {
  72         pci_release_regions(chip->pci);
  73         pci_disable_device(chip->pci);
  74         kfree(chip);
  75         return 0;
  76 }
  77
  78 static int snd_cs5530_dev_free(struct snd_device *device)
  79 {
  80         struct snd_cs5530 *chip = device->device_data;
  81         return snd_cs5530_free(chip);
  82 }
  83
  84 static void __devexit snd_cs5530_remove(struct pci_dev *pci)
  85 {
  86         snd_card_free(pci_get_drvdata(pci));
  87         pci_set_drvdata(pci, NULL);
  88 }
  89
  90 static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg)
  91 {
  92         outb(reg, io + 4);
  93         udelay(20);
  94         reg = inb(io + 5);
  95         udelay(20);
  96         return reg;
  97 }
  98
  99 static int __devinit snd_cs5530_create(struct snd_card *card,
 100                                        struct pci_dev *pci,
 101                                        struct snd_cs5530 **rchip)
 102 {
 103         struct snd_cs5530 *chip;
 104         unsigned long sb_base;
 105         u8 irq, dma8, dma16 = 0;
 106         u16 map;
 107         void __iomem *mem;
 108         int err;
 109
 110         static struct snd_device_ops ops = {
 111                 .dev_free = snd_cs5530_dev_free,
 112         };
 113         *rchip = NULL;
 114
 115         err = pci_enable_device(pci);
 116         if (err < 0)
 117                 return err;
 118
 119         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 120         if (chip == NULL) {
 121                 pci_disable_device(pci);
 122                 return -ENOMEM;
 123         }
 124
 125         chip->card = card;
 126         chip->pci = pci;
 127
 128         err = pci_request_regions(pci, "CS5530");
 129         if (err < 0) {
 130                 kfree(chip);
 131                 pci_disable_device(pci);
 132                 return err;
 133         }
 134         chip->pci_base = pci_resource_start(pci, 0);
 135
 136         mem = pci_ioremap_bar(pci, 0);
 137         if (mem == NULL) {
 138                 kfree(chip);
 139                 pci_disable_device(pci);
 140                 return -EBUSY;
 141         }
 142
 143         map = readw(mem + 0x18);
 144         iounmap(mem);
 145
 146         /* Map bits
 147                 0:1     * 0x20 + 0x200 = sb base
 148                 2       sb enable
 149                 3       adlib enable
 150                 5       MPU enable 0x330
 151                 6       MPU enable 0x300
 152
 153            The other bits may be used internally so must be masked */
 154
 155         sb_base = 0x220 + 0x20 * (map & 3);
 156
 157         if (map & (1<<2))
 158                 printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
 159         else {
 160                 printk(KERN_ERR "Could not find XpressAudio!\n");
 161                 snd_cs5530_free(chip);
 162                 return -ENODEV;
 163         }
 164
 165         if (map & (1<<5))
 166                 printk(KERN_INFO "CS5530: MPU at 0x300\n");
 167         else if (map & (1<<6))
 168                 printk(KERN_INFO "CS5530: MPU at 0x330\n");
 169
 170         irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 171         dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 172
 173         if (dma8 & 0x20)
 174                 dma16 = 5;
 175         else if (dma8 & 0x40)
 176                 dma16 = 6;
 177         else if (dma8 & 0x80)
 178                 dma16 = 7;
 179         else {
 180                 printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
 181                 snd_cs5530_free(chip);
 182                 return -ENODEV;
 183         }
 184
 185         if (dma8 & 0x01)
 186                 dma8 = 0;
 187         else if (dma8 & 02)
 188                 dma8 = 1;
 189         else if (dma8 & 0x08)
 190                 dma8 = 3;
 191         else {
 192                 printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
 193                 snd_cs5530_free(chip);
 194                 return -ENODEV;
 195         }
 196
 197         if (irq & 1)
 198                 irq = 9;
 199         else if (irq & 2)
 200                 irq = 5;
 201         else if (irq & 4)
 202                 irq = 7;
 203         else if (irq & 8)
 204                 irq = 10;
 205         else {
 206                 printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
 207                 snd_cs5530_free(chip);
 208                 return -ENODEV;
 209         }
 210
 211         printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8,
 212                                                                         dma16);
 213
 214         err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 215                                                 dma16, SB_HW_CS5530, &chip->sb);
 216         if (err < 0) {
 217                 printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
 218                 snd_cs5530_free(chip);
 219                 return err;
 220         }
 221
 222         err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
 223         if (err < 0) {
 224                 printk(KERN_ERR "CS5530: Could not create PCM\n");
 225                 snd_cs5530_free(chip);
 226                 return err;
 227         }
 228
 229         err = snd_sbmixer_new(chip->sb);
 230         if (err < 0) {
 231                 printk(KERN_ERR "CS5530: Could not create Mixer\n");
 232                 snd_cs5530_free(chip);
 233                 return err;
 234         }
 235
 236         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 237         if (err < 0) {
 238                 snd_cs5530_free(chip);
 239                 return err;
 240         }
 241
 242         snd_card_set_dev(card, &pci->dev);
 243         *rchip = chip;
 244         return 0;
 245 }
 246
 247 static int __devinit snd_cs5530_probe(struct pci_dev *pci,
 248                                         const struct pci_device_id *pci_id)
 249 {
 250         static int dev;
 251         struct snd_card *card;
 252         struct snd_cs5530 *chip = NULL;
 253         int err;
 254
 255         if (dev >= SNDRV_CARDS)
 256                 return -ENODEV;
 257         if (!enable[dev]) {
 258                 dev++;
 259                 return -ENOENT;
 260         }
 261
 262         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 263
 264         if (err < 0)
 265                 return err;
 266
 267         err = snd_cs5530_create(card, pci, &chip);
 268         if (err < 0) {
 269                 snd_card_free(card);
 270                 return err;
 271         }
 272
 273         strcpy(card->driver, "CS5530");
 274         strcpy(card->shortname, "CS5530 Audio");
 275         sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 276
 277         err = snd_card_register(card);
 278         if (err < 0) {
 279                 snd_card_free(card);
 280                 return err;
 281         }
 282         pci_set_drvdata(pci, card);
 283         dev++;
 284         return 0;
 285 }
 286
 287 static struct pci_driver driver = {
 288         .name = "CS5530_Audio",
 289         .id_table = snd_cs5530_ids,
 290         .probe = snd_cs5530_probe,
 291         .remove = __devexit_p(snd_cs5530_remove),
 292 };
 293
 294 static int __init alsa_card_cs5530_init(void)
 295 {
 296         return pci_register_driver(&driver);
 297 }
 298
 299 static void __exit alsa_card_cs5530_exit(void)
 300 {
 301         pci_unregister_driver(&driver);
 302 }
 303
 304 module_init(alsa_card_cs5530_init)
 305 module_exit(alsa_card_cs5530_exit)
 306