linux/sound/pci/cs5530.c
<<
>>
Prefs
   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 __devexit snd_cs5530_remove(struct pci_dev *pci)
  92{
  93        snd_card_free(pci_get_drvdata(pci));
  94        pci_set_drvdata(pci, NULL);
  95}
  96
  97static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg)
  98{
  99        outb(reg, io + 4);
 100        udelay(20);
 101        reg = inb(io + 5);
 102        udelay(20);
 103        return reg;
 104}
 105
 106static int __devinit snd_cs5530_create(struct snd_card *card,
 107                                       struct pci_dev *pci,
 108                                       struct snd_cs5530 **rchip)
 109{
 110        struct snd_cs5530 *chip;
 111        unsigned long sb_base;
 112        u8 irq, dma8, dma16 = 0;
 113        u16 map;
 114        void __iomem *mem;
 115        int err;
 116
 117        static struct snd_device_ops ops = {
 118                .dev_free = snd_cs5530_dev_free,
 119        };
 120        *rchip = NULL;
 121
 122        err = pci_enable_device(pci);
 123        if (err < 0)
 124                return err;
 125
 126        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 127        if (chip == NULL) {
 128                pci_disable_device(pci);
 129                return -ENOMEM;
 130        }
 131
 132        chip->card = card;
 133        chip->pci = pci;
 134
 135        err = pci_request_regions(pci, "CS5530");
 136        if (err < 0) {
 137                kfree(chip); 
 138                pci_disable_device(pci);
 139                return err;
 140        }
 141        chip->pci_base = pci_resource_start(pci, 0);
 142
 143        mem = pci_ioremap_bar(pci, 0);
 144        if (mem == NULL) {
 145                snd_cs5530_free(chip);
 146                return -EBUSY;
 147        }
 148
 149        map = readw(mem + 0x18);
 150        iounmap(mem);
 151
 152        /* Map bits
 153                0:1     * 0x20 + 0x200 = sb base
 154                2       sb enable
 155                3       adlib enable
 156                5       MPU enable 0x330
 157                6       MPU enable 0x300
 158
 159           The other bits may be used internally so must be masked */
 160
 161        sb_base = 0x220 + 0x20 * (map & 3);
 162
 163        if (map & (1<<2))
 164                printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
 165        else {
 166                printk(KERN_ERR "Could not find XpressAudio!\n");
 167                snd_cs5530_free(chip);
 168                return -ENODEV;
 169        }
 170
 171        if (map & (1<<5))
 172                printk(KERN_INFO "CS5530: MPU at 0x300\n");
 173        else if (map & (1<<6))
 174                printk(KERN_INFO "CS5530: MPU at 0x330\n");
 175
 176        irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 177        dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 178
 179        if (dma8 & 0x20)
 180                dma16 = 5;
 181        else if (dma8 & 0x40)
 182                dma16 = 6;
 183        else if (dma8 & 0x80)
 184                dma16 = 7;
 185        else {
 186                printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
 187                snd_cs5530_free(chip);
 188                return -ENODEV;
 189        }
 190
 191        if (dma8 & 0x01)
 192                dma8 = 0;
 193        else if (dma8 & 02)
 194                dma8 = 1;
 195        else if (dma8 & 0x08)
 196                dma8 = 3;
 197        else {
 198                printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
 199                snd_cs5530_free(chip);
 200                return -ENODEV;
 201        }
 202
 203        if (irq & 1)
 204                irq = 9;
 205        else if (irq & 2)
 206                irq = 5;
 207        else if (irq & 4)
 208                irq = 7;
 209        else if (irq & 8)
 210                irq = 10;
 211        else {
 212                printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
 213                snd_cs5530_free(chip);
 214                return -ENODEV;
 215        }
 216
 217        printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, 
 218                                                                        dma16);
 219
 220        err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 221                                                dma16, SB_HW_CS5530, &chip->sb);
 222        if (err < 0) {
 223                printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
 224                snd_cs5530_free(chip);
 225                return err;
 226        }
 227
 228        err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
 229        if (err < 0) {
 230                printk(KERN_ERR "CS5530: Could not create PCM\n");
 231                snd_cs5530_free(chip);
 232                return err;
 233        }
 234
 235        err = snd_sbmixer_new(chip->sb);
 236        if (err < 0) {
 237                printk(KERN_ERR "CS5530: Could not create Mixer\n");
 238                snd_cs5530_free(chip);
 239                return err;
 240        }
 241
 242        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 243        if (err < 0) {
 244                snd_cs5530_free(chip);
 245                return err;
 246        }
 247
 248        snd_card_set_dev(card, &pci->dev);
 249        *rchip = chip;
 250        return 0;
 251}
 252
 253static int __devinit snd_cs5530_probe(struct pci_dev *pci,
 254                                        const struct pci_device_id *pci_id)
 255{
 256        static int dev;
 257        struct snd_card *card;
 258        struct snd_cs5530 *chip = NULL;
 259        int err;
 260
 261        if (dev >= SNDRV_CARDS)
 262                return -ENODEV;
 263        if (!enable[dev]) {
 264                dev++;
 265                return -ENOENT;
 266        }
 267
 268        err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 269
 270        if (err < 0)
 271                return err;
 272
 273        err = snd_cs5530_create(card, pci, &chip);
 274        if (err < 0) {
 275                snd_card_free(card);
 276                return err;
 277        }
 278
 279        strcpy(card->driver, "CS5530");
 280        strcpy(card->shortname, "CS5530 Audio");
 281        sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 282
 283        err = snd_card_register(card);
 284        if (err < 0) {
 285                snd_card_free(card);
 286                return err;
 287        }
 288        pci_set_drvdata(pci, card);
 289        dev++;
 290        return 0;
 291}
 292
 293static struct pci_driver cs5530_driver = {
 294        .name = KBUILD_MODNAME,
 295        .id_table = snd_cs5530_ids,
 296        .probe = snd_cs5530_probe,
 297        .remove = __devexit_p(snd_cs5530_remove),
 298};
 299
 300module_pci_driver(cs5530_driver);
 301
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.