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 __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                kfree(chip);
 146                pci_disable_device(pci);
 147                return -EBUSY;
 148        }
 149
 150        map = readw(mem + 0x18);
 151        iounmap(mem);
 152
 153        /* Map bits
 154                0:1     * 0x20 + 0x200 = sb base
 155                2       sb enable
 156                3       adlib enable
 157                5       MPU enable 0x330
 158                6       MPU enable 0x300
 159
 160           The other bits may be used internally so must be masked */
 161
 162        sb_base = 0x220 + 0x20 * (map & 3);
 163
 164        if (map & (1<<2))
 165                printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
 166        else {
 167                printk(KERN_ERR "Could not find XpressAudio!\n");
 168                snd_cs5530_free(chip);
 169                return -ENODEV;
 170        }
 171
 172        if (map & (1<<5))
 173                printk(KERN_INFO "CS5530: MPU at 0x300\n");
 174        else if (map & (1<<6))
 175                printk(KERN_INFO "CS5530: MPU at 0x330\n");
 176
 177        irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 178        dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 179
 180        if (dma8 & 0x20)
 181                dma16 = 5;
 182        else if (dma8 & 0x40)
 183                dma16 = 6;
 184        else if (dma8 & 0x80)
 185                dma16 = 7;
 186        else {
 187                printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
 188                snd_cs5530_free(chip);
 189                return -ENODEV;
 190        }
 191
 192        if (dma8 & 0x01)
 193                dma8 = 0;
 194        else if (dma8 & 02)
 195                dma8 = 1;
 196        else if (dma8 & 0x08)
 197                dma8 = 3;
 198        else {
 199                printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
 200                snd_cs5530_free(chip);
 201                return -ENODEV;
 202        }
 203
 204        if (irq & 1)
 205                irq = 9;
 206        else if (irq & 2)
 207                irq = 5;
 208        else if (irq & 4)
 209                irq = 7;
 210        else if (irq & 8)
 211                irq = 10;
 212        else {
 213                printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
 214                snd_cs5530_free(chip);
 215                return -ENODEV;
 216        }
 217
 218        printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, 
 219                                                                        dma16);
 220
 221        err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 222                                                dma16, SB_HW_CS5530, &chip->sb);
 223        if (err < 0) {
 224                printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
 225                snd_cs5530_free(chip);
 226                return err;
 227        }
 228
 229        err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
 230        if (err < 0) {
 231                printk(KERN_ERR "CS5530: Could not create PCM\n");
 232                snd_cs5530_free(chip);
 233                return err;
 234        }
 235
 236        err = snd_sbmixer_new(chip->sb);
 237        if (err < 0) {
 238                printk(KERN_ERR "CS5530: Could not create Mixer\n");
 239                snd_cs5530_free(chip);
 240                return err;
 241        }
 242
 243        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 244        if (err < 0) {
 245                snd_cs5530_free(chip);
 246                return err;
 247        }
 248
 249        snd_card_set_dev(card, &pci->dev);
 250        *rchip = chip;
 251        return 0;
 252}
 253
 254static int __devinit snd_cs5530_probe(struct pci_dev *pci,
 255                                        const struct pci_device_id *pci_id)
 256{
 257        static int dev;
 258        struct snd_card *card;
 259        struct snd_cs5530 *chip = NULL;
 260        int err;
 261
 262        if (dev >= SNDRV_CARDS)
 263                return -ENODEV;
 264        if (!enable[dev]) {
 265                dev++;
 266                return -ENOENT;
 267        }
 268
 269        err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 270
 271        if (err < 0)
 272                return err;
 273
 274        err = snd_cs5530_create(card, pci, &chip);
 275        if (err < 0) {
 276                snd_card_free(card);
 277                return err;
 278        }
 279
 280        strcpy(card->driver, "CS5530");
 281        strcpy(card->shortname, "CS5530 Audio");
 282        sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 283
 284        err = snd_card_register(card);
 285        if (err < 0) {
 286                snd_card_free(card);
 287                return err;
 288        }
 289        pci_set_drvdata(pci, card);
 290        dev++;
 291        return 0;
 292}
 293
 294static struct pci_driver cs5530_driver = {
 295        .name = KBUILD_MODNAME,
 296        .id_table = snd_cs5530_ids,
 297        .probe = snd_cs5530_probe,
 298        .remove = __devexit_p(snd_cs5530_remove),
 299};
 300
 301module_pci_driver(cs5530_driver);
 302
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