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/module.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 bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  54
  55 module_param_array(index, int, NULL, 0444);
  56 MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
  57 module_param_array(id, charp, NULL, 0444);
  58 MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
  59 module_param_array(enable, bool, NULL, 0444);
  60 MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
  61
  62 struct snd_cs5530 {
  63         struct snd_card *card;
  64         struct pci_dev *pci;
  65         struct snd_sb *sb;
  66         unsigned long pci_base;
  67 };
  68
  69 static const struct pci_device_id snd_cs5530_ids[] = {
  70         {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
  71                                                         PCI_ANY_ID, 0, 0},
  72         {0,}
  73 };
  74
  75 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
  76
  77 static int snd_cs5530_free(struct snd_cs5530 *chip)
  78 {
  79         pci_release_regions(chip->pci);
  80         pci_disable_device(chip->pci);
  81         kfree(chip);
  82         return 0;
  83 }
  84
  85 static int snd_cs5530_dev_free(struct snd_device *device)
  86 {
  87         struct snd_cs5530 *chip = device->device_data;
  88         return snd_cs5530_free(chip);
  89 }
  90
  91 static void snd_cs5530_remove(struct pci_dev *pci)
  92 {
  93         snd_card_free(pci_get_drvdata(pci));
  94 }
  95
  96 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
  97 {
  98         outb(reg, io + 4);
  99         udelay(20);
 100         reg = inb(io + 5);
 101         udelay(20);
 102         return reg;
 103 }
 104
 105 static int snd_cs5530_create(struct snd_card *card,
 106                              struct pci_dev *pci,
 107                              struct snd_cs5530 **rchip)
 108 {
 109         struct snd_cs5530 *chip;
 110         unsigned long sb_base;
 111         u8 irq, dma8, dma16 = 0;
 112         u16 map;
 113         void __iomem *mem;
 114         int err;
 115
 116         static struct snd_device_ops ops = {
 117                 .dev_free = snd_cs5530_dev_free,
 118         };
 119         *rchip = NULL;
 120
 121         err = pci_enable_device(pci);
 122         if (err < 0)
 123                 return err;
 124
 125         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 126         if (chip == NULL) {
 127                 pci_disable_device(pci);
 128                 return -ENOMEM;
 129         }
 130
 131         chip->card = card;
 132         chip->pci = pci;
 133
 134         err = pci_request_regions(pci, "CS5530");
 135         if (err < 0) {
 136                 kfree(chip);
 137                 pci_disable_device(pci);
 138                 return err;
 139         }
 140         chip->pci_base = pci_resource_start(pci, 0);
 141
 142         mem = pci_ioremap_bar(pci, 0);
 143         if (mem == NULL) {
 144                 snd_cs5530_free(chip);
 145                 return -EBUSY;
 146         }
 147
 148         map = readw(mem + 0x18);
 149         iounmap(mem);
 150
 151         /* Map bits
 152                 0:1     * 0x20 + 0x200 = sb base
 153                 2       sb enable
 154                 3       adlib enable
 155                 5       MPU enable 0x330
 156                 6       MPU enable 0x300
 157
 158            The other bits may be used internally so must be masked */
 159
 160         sb_base = 0x220 + 0x20 * (map & 3);
 161
 162         if (map & (1<<2))
 163                 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
 164         else {
 165                 dev_err(card->dev, "Could not find XpressAudio!\n");
 166                 snd_cs5530_free(chip);
 167                 return -ENODEV;
 168         }
 169
 170         if (map & (1<<5))
 171                 dev_info(card->dev, "MPU at 0x300\n");
 172         else if (map & (1<<6))
 173                 dev_info(card->dev, "MPU at 0x330\n");
 174
 175         irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 176         dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 177
 178         if (dma8 & 0x20)
 179                 dma16 = 5;
 180         else if (dma8 & 0x40)
 181                 dma16 = 6;
 182         else if (dma8 & 0x80)
 183                 dma16 = 7;
 184         else {
 185                 dev_err(card->dev, "No 16bit DMA enabled\n");
 186                 snd_cs5530_free(chip);
 187                 return -ENODEV;
 188         }
 189
 190         if (dma8 & 0x01)
 191                 dma8 = 0;
 192         else if (dma8 & 02)
 193                 dma8 = 1;
 194         else if (dma8 & 0x08)
 195                 dma8 = 3;
 196         else {
 197                 dev_err(card->dev, "No 8bit DMA enabled\n");
 198                 snd_cs5530_free(chip);
 199                 return -ENODEV;
 200         }
 201
 202         if (irq & 1)
 203                 irq = 9;
 204         else if (irq & 2)
 205                 irq = 5;
 206         else if (irq & 4)
 207                 irq = 7;
 208         else if (irq & 8)
 209                 irq = 10;
 210         else {
 211                 dev_err(card->dev, "SoundBlaster IRQ not set\n");
 212                 snd_cs5530_free(chip);
 213                 return -ENODEV;
 214         }
 215
 216         dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
 217
 218         err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 219                                                 dma16, SB_HW_CS5530, &chip->sb);
 220         if (err < 0) {
 221                 dev_err(card->dev, "Could not create SoundBlaster\n");
 222                 snd_cs5530_free(chip);
 223                 return err;
 224         }
 225
 226         err = snd_sb16dsp_pcm(chip->sb, 0);
 227         if (err < 0) {
 228                 dev_err(card->dev, "Could not create PCM\n");
 229                 snd_cs5530_free(chip);
 230                 return err;
 231         }
 232
 233         err = snd_sbmixer_new(chip->sb);
 234         if (err < 0) {
 235                 dev_err(card->dev, "Could not create Mixer\n");
 236                 snd_cs5530_free(chip);
 237                 return err;
 238         }
 239
 240         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 241         if (err < 0) {
 242                 snd_cs5530_free(chip);
 243                 return err;
 244         }
 245
 246         *rchip = chip;
 247         return 0;
 248 }
 249
 250 static int snd_cs5530_probe(struct pci_dev *pci,
 251                             const struct pci_device_id *pci_id)
 252 {
 253         static int dev;
 254         struct snd_card *card;
 255         struct snd_cs5530 *chip = NULL;
 256         int err;
 257
 258         if (dev >= SNDRV_CARDS)
 259                 return -ENODEV;
 260         if (!enable[dev]) {
 261                 dev++;
 262                 return -ENOENT;
 263         }
 264
 265         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 266                            0, &card);
 267
 268         if (err < 0)
 269                 return err;
 270
 271         err = snd_cs5530_create(card, pci, &chip);
 272         if (err < 0) {
 273                 snd_card_free(card);
 274                 return err;
 275         }
 276
 277         strcpy(card->driver, "CS5530");
 278         strcpy(card->shortname, "CS5530 Audio");
 279         sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 280
 281         err = snd_card_register(card);
 282         if (err < 0) {
 283                 snd_card_free(card);
 284                 return err;
 285         }
 286         pci_set_drvdata(pci, card);
 287         dev++;
 288         return 0;
 289 }
 290
 291 static struct pci_driver cs5530_driver = {
 292         .name = KBUILD_MODNAME,
 293         .id_table = snd_cs5530_ids,
 294         .probe = snd_cs5530_probe,
 295         .remove = snd_cs5530_remove,
 296 };
 297
 298 module_pci_driver(cs5530_driver);