sound/pci/cs5530.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
   4  *
   5  *      (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
   6  *      (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
   7  *
   8  * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
   9  * mess with it a bit. The chip seems to have to have trouble with full duplex
  10  * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
  11  * simultaneously play back audio at 16bit 44100kHz, the device actually plays
  12  * back in the same format in which it is capturing. By forcing the chip to
  13  * always play/capture in 16/44100, we can let alsa-lib convert the samples and
  14  * that way we can hack up some full duplex audio.
  15  *
  16  * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
  17  * The older version (VSA1) provides fairly good soundblaster emulation
  18  * although there are a couple of bugs: large DMA buffers break record,
  19  * and the MPU event handling seems suspect. VSA2 allows the native driver
  20  * to control the AC97 audio engine directly and requires a different driver.
  21  *
  22  * Thanks to National Semiconductor for providing the needed information
  23  * on the XpressAudio(tm) internals.
  24  *
  25  * TO DO:
  26  *      Investigate whether we can portably support Cognac (5520) in the
  27  *      same manner.
  28  */
  29
  30 #include <linux/delay.h>
  31 #include <linux/module.h>
  32 #include <linux/pci.h>
  33 #include <linux/slab.h>
  34 #include <sound/core.h>
  35 #include <sound/sb.h>
  36 #include <sound/initval.h>
  37
  38 MODULE_AUTHOR("Ash Willis");
  39 MODULE_DESCRIPTION("CS5530 Audio");
  40 MODULE_LICENSE("GPL");
  41
  42 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  43 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  44 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  45
  46 module_param_array(index, int, NULL, 0444);
  47 MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
  48 module_param_array(id, charp, NULL, 0444);
  49 MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
  50 module_param_array(enable, bool, NULL, 0444);
  51 MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
  52
  53 struct snd_cs5530 {
  54         struct snd_card *card;
  55         struct pci_dev *pci;
  56         struct snd_sb *sb;
  57         unsigned long pci_base;
  58 };
  59
  60 static const struct pci_device_id snd_cs5530_ids[] = {
  61         {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
  62                                                         PCI_ANY_ID, 0, 0},
  63         {0,}
  64 };
  65
  66 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
  67
  68 static int snd_cs5530_free(struct snd_cs5530 *chip)
  69 {
  70         pci_release_regions(chip->pci);
  71         pci_disable_device(chip->pci);
  72         kfree(chip);
  73         return 0;
  74 }
  75
  76 static int snd_cs5530_dev_free(struct snd_device *device)
  77 {
  78         struct snd_cs5530 *chip = device->device_data;
  79         return snd_cs5530_free(chip);
  80 }
  81
  82 static void snd_cs5530_remove(struct pci_dev *pci)
  83 {
  84         snd_card_free(pci_get_drvdata(pci));
  85 }
  86
  87 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
  88 {
  89         outb(reg, io + 4);
  90         udelay(20);
  91         reg = inb(io + 5);
  92         udelay(20);
  93         return reg;
  94 }
  95
  96 static int snd_cs5530_create(struct snd_card *card,
  97                              struct pci_dev *pci,
  98                              struct snd_cs5530 **rchip)
  99 {
 100         struct snd_cs5530 *chip;
 101         unsigned long sb_base;
 102         u8 irq, dma8, dma16 = 0;
 103         u16 map;
 104         void __iomem *mem;
 105         int err;
 106
 107         static const struct snd_device_ops ops = {
 108                 .dev_free = snd_cs5530_dev_free,
 109         };
 110         *rchip = NULL;
 111
 112         err = pci_enable_device(pci);
 113         if (err < 0)
 114                 return err;
 115
 116         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 117         if (chip == NULL) {
 118                 pci_disable_device(pci);
 119                 return -ENOMEM;
 120         }
 121
 122         chip->card = card;
 123         chip->pci = pci;
 124
 125         err = pci_request_regions(pci, "CS5530");
 126         if (err < 0) {
 127                 kfree(chip);
 128                 pci_disable_device(pci);
 129                 return err;
 130         }
 131         chip->pci_base = pci_resource_start(pci, 0);
 132
 133         mem = pci_ioremap_bar(pci, 0);
 134         if (mem == NULL) {
 135                 snd_cs5530_free(chip);
 136                 return -EBUSY;
 137         }
 138
 139         map = readw(mem + 0x18);
 140         iounmap(mem);
 141
 142         /* Map bits
 143                 0:1     * 0x20 + 0x200 = sb base
 144                 2       sb enable
 145                 3       adlib enable
 146                 5       MPU enable 0x330
 147                 6       MPU enable 0x300
 148
 149            The other bits may be used internally so must be masked */
 150
 151         sb_base = 0x220 + 0x20 * (map & 3);
 152
 153         if (map & (1<<2))
 154                 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
 155         else {
 156                 dev_err(card->dev, "Could not find XpressAudio!\n");
 157                 snd_cs5530_free(chip);
 158                 return -ENODEV;
 159         }
 160
 161         if (map & (1<<5))
 162                 dev_info(card->dev, "MPU at 0x300\n");
 163         else if (map & (1<<6))
 164                 dev_info(card->dev, "MPU at 0x330\n");
 165
 166         irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 167         dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 168
 169         if (dma8 & 0x20)
 170                 dma16 = 5;
 171         else if (dma8 & 0x40)
 172                 dma16 = 6;
 173         else if (dma8 & 0x80)
 174                 dma16 = 7;
 175         else {
 176                 dev_err(card->dev, "No 16bit DMA enabled\n");
 177                 snd_cs5530_free(chip);
 178                 return -ENODEV;
 179         }
 180
 181         if (dma8 & 0x01)
 182                 dma8 = 0;
 183         else if (dma8 & 02)
 184                 dma8 = 1;
 185         else if (dma8 & 0x08)
 186                 dma8 = 3;
 187         else {
 188                 dev_err(card->dev, "No 8bit DMA enabled\n");
 189                 snd_cs5530_free(chip);
 190                 return -ENODEV;
 191         }
 192
 193         if (irq & 1)
 194                 irq = 9;
 195         else if (irq & 2)
 196                 irq = 5;
 197         else if (irq & 4)
 198                 irq = 7;
 199         else if (irq & 8)
 200                 irq = 10;
 201         else {
 202                 dev_err(card->dev, "SoundBlaster IRQ not set\n");
 203                 snd_cs5530_free(chip);
 204                 return -ENODEV;
 205         }
 206
 207         dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
 208
 209         err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 210                                                 dma16, SB_HW_CS5530, &chip->sb);
 211         if (err < 0) {
 212                 dev_err(card->dev, "Could not create SoundBlaster\n");
 213                 snd_cs5530_free(chip);
 214                 return err;
 215         }
 216
 217         err = snd_sb16dsp_pcm(chip->sb, 0);
 218         if (err < 0) {
 219                 dev_err(card->dev, "Could not create PCM\n");
 220                 snd_cs5530_free(chip);
 221                 return err;
 222         }
 223
 224         err = snd_sbmixer_new(chip->sb);
 225         if (err < 0) {
 226                 dev_err(card->dev, "Could not create Mixer\n");
 227                 snd_cs5530_free(chip);
 228                 return err;
 229         }
 230
 231         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 232         if (err < 0) {
 233                 snd_cs5530_free(chip);
 234                 return err;
 235         }
 236
 237         *rchip = chip;
 238         return 0;
 239 }
 240
 241 static int snd_cs5530_probe(struct pci_dev *pci,
 242                             const struct pci_device_id *pci_id)
 243 {
 244         static int dev;
 245         struct snd_card *card;
 246         struct snd_cs5530 *chip = NULL;
 247         int err;
 248
 249         if (dev >= SNDRV_CARDS)
 250                 return -ENODEV;
 251         if (!enable[dev]) {
 252                 dev++;
 253                 return -ENOENT;
 254         }
 255
 256         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 257                            0, &card);
 258
 259         if (err < 0)
 260                 return err;
 261
 262         err = snd_cs5530_create(card, pci, &chip);
 263         if (err < 0) {
 264                 snd_card_free(card);
 265                 return err;
 266         }
 267
 268         strcpy(card->driver, "CS5530");
 269         strcpy(card->shortname, "CS5530 Audio");
 270         sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 271
 272         err = snd_card_register(card);
 273         if (err < 0) {
 274                 snd_card_free(card);
 275                 return err;
 276         }
 277         pci_set_drvdata(pci, card);
 278         dev++;
 279         return 0;
 280 }
 281
 282 static struct pci_driver cs5530_driver = {
 283         .name = KBUILD_MODNAME,
 284         .id_table = snd_cs5530_ids,
 285         .probe = snd_cs5530_probe,
 286         .remove = snd_cs5530_remove,
 287 };
 288
 289 module_pci_driver(cs5530_driver);