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 <sound/core.h>
  43 #include <sound/sb.h>
  44 #include <sound/initval.h>
  45
  46 MODULE_AUTHOR("Ash Willis");
  47 MODULE_DESCRIPTION("CS5530 Audio");
  48 MODULE_LICENSE("GPL");
  49
  50 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  51 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  52 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  53
  54 struct snd_cs5530 {
  55         struct snd_card *card;
  56         struct pci_dev *pci;
  57         struct snd_sb *sb;
  58         unsigned long pci_base;
  59 };
  60
  61 static DEFINE_PCI_DEVICE_TABLE(snd_cs5530_ids) = {
  62         {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
  63                                                         PCI_ANY_ID, 0, 0},
  64         {0,}
  65 };
  66
  67 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
  68
  69 static int snd_cs5530_free(struct snd_cs5530 *chip)
  70 {
  71         pci_release_regions(chip->pci);
  72         pci_disable_device(chip->pci);
  73         kfree(chip);
  74         return 0;
  75 }
  76
  77 static int snd_cs5530_dev_free(struct snd_device *device)
  78 {
  79         struct snd_cs5530 *chip = device->device_data;
  80         return snd_cs5530_free(chip);
  81 }
  82
  83 static void __devexit snd_cs5530_remove(struct pci_dev *pci)
  84 {
  85         snd_card_free(pci_get_drvdata(pci));
  86         pci_set_drvdata(pci, NULL);
  87 }
  88
  89 static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg)
  90 {
  91         outb(reg, io + 4);
  92         udelay(20);
  93         reg = inb(io + 5);
  94         udelay(20);
  95         return reg;
  96 }
  97
  98 static int __devinit snd_cs5530_create(struct snd_card *card,
  99                                        struct pci_dev *pci,
 100                                        struct snd_cs5530 **rchip)
 101 {
 102         struct snd_cs5530 *chip;
 103         unsigned long sb_base;
 104         u8 irq, dma8, dma16 = 0;
 105         u16 map;
 106         void __iomem *mem;
 107         int err;
 108
 109         static struct snd_device_ops ops = {
 110                 .dev_free = snd_cs5530_dev_free,
 111         };
 112         *rchip = NULL;
 113
 114         err = pci_enable_device(pci);
 115         if (err < 0)
 116                 return err;
 117
 118         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 119         if (chip == NULL) {
 120                 pci_disable_device(pci);
 121                 return -ENOMEM;
 122         }
 123
 124         chip->card = card;
 125         chip->pci = pci;
 126
 127         err = pci_request_regions(pci, "CS5530");
 128         if (err < 0) {
 129                 kfree(chip);
 130                 pci_disable_device(pci);
 131                 return err;
 132         }
 133         chip->pci_base = pci_resource_start(pci, 0);
 134
 135         mem = pci_ioremap_bar(pci, 0);
 136         if (mem == NULL) {
 137                 kfree(chip);
 138                 pci_disable_device(pci);
 139                 return -EBUSY;
 140         }
 141
 142         map = readw(mem + 0x18);
 143         iounmap(mem);
 144
 145         /* Map bits
 146                 0:1     * 0x20 + 0x200 = sb base
 147                 2       sb enable
 148                 3       adlib enable
 149                 5       MPU enable 0x330
 150                 6       MPU enable 0x300
 151
 152            The other bits may be used internally so must be masked */
 153
 154         sb_base = 0x220 + 0x20 * (map & 3);
 155
 156         if (map & (1<<2))
 157                 printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
 158         else {
 159                 printk(KERN_ERR "Could not find XpressAudio!\n");
 160                 snd_cs5530_free(chip);
 161                 return -ENODEV;
 162         }
 163
 164         if (map & (1<<5))
 165                 printk(KERN_INFO "CS5530: MPU at 0x300\n");
 166         else if (map & (1<<6))
 167                 printk(KERN_INFO "CS5530: MPU at 0x330\n");
 168
 169         irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 170         dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 171
 172         if (dma8 & 0x20)
 173                 dma16 = 5;
 174         else if (dma8 & 0x40)
 175                 dma16 = 6;
 176         else if (dma8 & 0x80)
 177                 dma16 = 7;
 178         else {
 179                 printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
 180                 snd_cs5530_free(chip);
 181                 return -ENODEV;
 182         }
 183
 184         if (dma8 & 0x01)
 185                 dma8 = 0;
 186         else if (dma8 & 02)
 187                 dma8 = 1;
 188         else if (dma8 & 0x08)
 189                 dma8 = 3;
 190         else {
 191                 printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
 192                 snd_cs5530_free(chip);
 193                 return -ENODEV;
 194         }
 195
 196         if (irq & 1)
 197                 irq = 9;
 198         else if (irq & 2)
 199                 irq = 5;
 200         else if (irq & 4)
 201                 irq = 7;
 202         else if (irq & 8)
 203                 irq = 10;
 204         else {
 205                 printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
 206                 snd_cs5530_free(chip);
 207                 return -ENODEV;
 208         }
 209
 210         printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8,
 211                                                                         dma16);
 212
 213         err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 214                                                 dma16, SB_HW_CS5530, &chip->sb);
 215         if (err < 0) {
 216                 printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
 217                 snd_cs5530_free(chip);
 218                 return err;
 219         }
 220
 221         err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
 222         if (err < 0) {
 223                 printk(KERN_ERR "CS5530: Could not create PCM\n");
 224                 snd_cs5530_free(chip);
 225                 return err;
 226         }
 227
 228         err = snd_sbmixer_new(chip->sb);
 229         if (err < 0) {
 230                 printk(KERN_ERR "CS5530: Could not create Mixer\n");
 231                 snd_cs5530_free(chip);
 232                 return err;
 233         }
 234
 235         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 236         if (err < 0) {
 237                 snd_cs5530_free(chip);
 238                 return err;
 239         }
 240
 241         snd_card_set_dev(card, &pci->dev);
 242         *rchip = chip;
 243         return 0;
 244 }
 245
 246 static int __devinit snd_cs5530_probe(struct pci_dev *pci,
 247                                         const struct pci_device_id *pci_id)
 248 {
 249         static int dev;
 250         struct snd_card *card;
 251         struct snd_cs5530 *chip = NULL;
 252         int err;
 253
 254         if (dev >= SNDRV_CARDS)
 255                 return -ENODEV;
 256         if (!enable[dev]) {
 257                 dev++;
 258                 return -ENOENT;
 259         }
 260
 261         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 262
 263         if (err < 0)
 264                 return err;
 265
 266         err = snd_cs5530_create(card, pci, &chip);
 267         if (err < 0) {
 268                 snd_card_free(card);
 269                 return err;
 270         }
 271
 272         strcpy(card->driver, "CS5530");
 273         strcpy(card->shortname, "CS5530 Audio");
 274         sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 275
 276         err = snd_card_register(card);
 277         if (err < 0) {
 278                 snd_card_free(card);
 279                 return err;
 280         }
 281         pci_set_drvdata(pci, card);
 282         dev++;
 283         return 0;
 284 }
 285
 286 static struct pci_driver driver = {
 287         .name = "CS5530_Audio",
 288         .id_table = snd_cs5530_ids,
 289         .probe = snd_cs5530_probe,
 290         .remove = __devexit_p(snd_cs5530_remove),
 291 };
 292
 293 static int __init alsa_card_cs5530_init(void)
 294 {
 295         return pci_register_driver(&driver);
 296 }
 297
 298 static void __exit alsa_card_cs5530_exit(void)
 299 {
 300         pci_unregister_driver(&driver);
 301 }
 302
 303 module_init(alsa_card_cs5530_init)
 304 module_exit(alsa_card_cs5530_exit)
 305