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 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
  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         pci_set_drvdata(pci, NULL);
  95 }
  96
  97 static u8 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
 106 static int 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
 253 static int 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
 293 static struct pci_driver cs5530_driver = {
 294         .name = KBUILD_MODNAME,
 295         .id_table = snd_cs5530_ids,
 296         .probe = snd_cs5530_probe,
 297         .remove = snd_cs5530_remove,
 298 };
 299
 300 module_pci_driver(cs5530_driver);