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/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
  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 bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  54
  55module_param_array(index, int, NULL, 0444);
  56MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
  57module_param_array(id, charp, NULL, 0444);
  58MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
  59module_param_array(enable, bool, NULL, 0444);
  60MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
  61
  62struct snd_cs5530 {
  63        struct snd_card *card;
  64        struct pci_dev *pci;
  65        struct snd_sb *sb;
  66        unsigned long pci_base;
  67};
  68
  69static DEFINE_PCI_DEVICE_TABLE(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
  75MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
  76
  77static 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
  85static 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
  91static void snd_cs5530_remove(struct pci_dev *pci)
  92{
  93        snd_card_free(pci_get_drvdata(pci));
  94}
  95
  96static 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
 105static 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                printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
 164        else {
 165                printk(KERN_ERR "Could not find XpressAudio!\n");
 166                snd_cs5530_free(chip);
 167                return -ENODEV;
 168        }
 169
 170        if (map & (1<<5))
 171                printk(KERN_INFO "CS5530: MPU at 0x300\n");
 172        else if (map & (1<<6))
 173                printk(KERN_INFO "CS5530: 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                printk(KERN_ERR "CS5530: 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                printk(KERN_ERR "CS5530: 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                printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
 212                snd_cs5530_free(chip);
 213                return -ENODEV;
 214        }
 215
 216        printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, 
 217                                                                        dma16);
 218
 219        err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 220                                                dma16, SB_HW_CS5530, &chip->sb);
 221        if (err < 0) {
 222                printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
 223                snd_cs5530_free(chip);
 224                return err;
 225        }
 226
 227        err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
 228        if (err < 0) {
 229                printk(KERN_ERR "CS5530: Could not create PCM\n");
 230                snd_cs5530_free(chip);
 231                return err;
 232        }
 233
 234        err = snd_sbmixer_new(chip->sb);
 235        if (err < 0) {
 236                printk(KERN_ERR "CS5530: Could not create Mixer\n");
 237                snd_cs5530_free(chip);
 238                return err;
 239        }
 240
 241        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 242        if (err < 0) {
 243                snd_cs5530_free(chip);
 244                return err;
 245        }
 246
 247        snd_card_set_dev(card, &pci->dev);
 248        *rchip = chip;
 249        return 0;
 250}
 251
 252static int snd_cs5530_probe(struct pci_dev *pci,
 253                            const struct pci_device_id *pci_id)
 254{
 255        static int dev;
 256        struct snd_card *card;
 257        struct snd_cs5530 *chip = NULL;
 258        int err;
 259
 260        if (dev >= SNDRV_CARDS)
 261                return -ENODEV;
 262        if (!enable[dev]) {
 263                dev++;
 264                return -ENOENT;
 265        }
 266
 267        err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 268
 269        if (err < 0)
 270                return err;
 271
 272        err = snd_cs5530_create(card, pci, &chip);
 273        if (err < 0) {
 274                snd_card_free(card);
 275                return err;
 276        }
 277
 278        strcpy(card->driver, "CS5530");
 279        strcpy(card->shortname, "CS5530 Audio");
 280        sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 281
 282        err = snd_card_register(card);
 283        if (err < 0) {
 284                snd_card_free(card);
 285                return err;
 286        }
 287        pci_set_drvdata(pci, card);
 288        dev++;
 289        return 0;
 290}
 291
 292static struct pci_driver cs5530_driver = {
 293        .name = KBUILD_MODNAME,
 294        .id_table = snd_cs5530_ids,
 295        .probe = snd_cs5530_probe,
 296        .remove = snd_cs5530_remove,
 297};
 298
 299module_pci_driver(cs5530_driver);
 300
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