linux/sound/pci/cs5530.c
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   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
  47MODULE_AUTHOR("Ash Willis");
  48MODULE_DESCRIPTION("CS5530 Audio");
  49MODULE_LICENSE("GPL");
  50
  51static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  52static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  53static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  54
  55struct snd_cs5530 {
  56        struct snd_card *card;
  57        struct pci_dev *pci;
  58        struct snd_sb *sb;
  59        unsigned long pci_base;
  60};
  61
  62static 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
  68MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
  69
  70static 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
  78static 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
  84static 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
  90static 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
  99static 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
 247static 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
 287static 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
 294static int __init alsa_card_cs5530_init(void)
 295{
 296        return pci_register_driver(&driver);
 297}
 298
 299static void __exit alsa_card_cs5530_exit(void)
 300{
 301        pci_unregister_driver(&driver);
 302}
 303
 304module_init(alsa_card_cs5530_init)
 305module_exit(alsa_card_cs5530_exit)
 306
 307