root/sound/pci/au88x0/au88x0.c

DEFINITIONS

1. vortex_fix_latency
2. vortex_fix_agp_bridge
3. snd_vortex_workaround
4. snd_vortex_dev_free
5. snd_vortex_create
6. snd_vortex_probe
7. snd_vortex_remove

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ALSA driver for the Aureal Vortex family of soundprocessors.
   4  * Author: Manuel Jander (mjander@embedded.cl)
   5  *
   6  *   This driver is the result of the OpenVortex Project from Savannah
   7  * (savannah.nongnu.org/projects/openvortex). I would like to thank
   8  * the developers of OpenVortex, Jeff Muizelaar and Kester Maddock, from
   9  * whom i got plenty of help, and their codebase was invaluable.
  10  *   Thanks to the ALSA developers, they helped a lot working out
  11  * the ALSA part.
  12  *   Thanks also to Sourceforge for maintaining the old binary drivers,
  13  * and the forum, where developers could comunicate.
  14  *
  15  * Now at least i can play Legacy DOOM with MIDI music :-)
  16  */
  17 
  18 #include "au88x0.h"
  19 #include <linux/init.h>
  20 #include <linux/pci.h>
  21 #include <linux/slab.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/module.h>
  24 #include <linux/dma-mapping.h>
  25 #include <sound/initval.h>
  26 
  27 // module parameters (see "Module Parameters")
  28 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  29 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  30 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  31 static int pcifix[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 255 };
  32 
  33 module_param_array(index, int, NULL, 0444);
  34 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
  35 module_param_array(id, charp, NULL, 0444);
  36 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
  37 module_param_array(enable, bool, NULL, 0444);
  38 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
  39 module_param_array(pcifix, int, NULL, 0444);
  40 MODULE_PARM_DESC(pcifix, "Enable VIA-workaround for " CARD_NAME " soundcard.");
  41 
  42 MODULE_DESCRIPTION("Aureal vortex");
  43 MODULE_LICENSE("GPL");
  44 MODULE_SUPPORTED_DEVICE("{{Aureal Semiconductor Inc., Aureal Vortex Sound Processor}}");
  45 
  46 MODULE_DEVICE_TABLE(pci, snd_vortex_ids);
  47 
  48 static void vortex_fix_latency(struct pci_dev *vortex)
  49 {
  50         int rc;
  51         if (!(rc = pci_write_config_byte(vortex, 0x40, 0xff))) {
  52                         dev_info(&vortex->dev, "vortex latency is 0xff\n");
  53         } else {
  54                 dev_warn(&vortex->dev,
  55                          "could not set vortex latency: pci error 0x%x\n", rc);
  56         }
  57 }
  58 
  59 static void vortex_fix_agp_bridge(struct pci_dev *via)
  60 {
  61         int rc;
  62         u8 value;
  63 
  64         /*
  65          * only set the bit (Extend PCI#2 Internal Master for
  66          * Efficient Handling of Dummy Requests) if the can
  67          * read the config and it is not already set
  68          */
  69 
  70         if (!(rc = pci_read_config_byte(via, 0x42, &value))
  71                         && ((value & 0x10)
  72                                 || !(rc = pci_write_config_byte(via, 0x42, value | 0x10)))) {
  73                 dev_info(&via->dev, "bridge config is 0x%x\n", value | 0x10);
  74         } else {
  75                 dev_warn(&via->dev,
  76                          "could not set vortex latency: pci error 0x%x\n", rc);
  77         }
  78 }
  79 
  80 static void snd_vortex_workaround(struct pci_dev *vortex, int fix)
  81 {
  82         struct pci_dev *via = NULL;
  83 
  84         /* autodetect if workarounds are required */
  85         if (fix == 255) {
  86                 /* VIA KT133 */
  87                 via = pci_get_device(PCI_VENDOR_ID_VIA,
  88                         PCI_DEVICE_ID_VIA_8365_1, NULL);
  89                 /* VIA Apollo */
  90                 if (via == NULL) {
  91                         via = pci_get_device(PCI_VENDOR_ID_VIA,
  92                                 PCI_DEVICE_ID_VIA_82C598_1, NULL);
  93                         /* AMD Irongate */
  94                         if (via == NULL)
  95                                 via = pci_get_device(PCI_VENDOR_ID_AMD,
  96                                         PCI_DEVICE_ID_AMD_FE_GATE_7007, NULL);
  97                 }
  98                 if (via) {
  99                         dev_info(&vortex->dev,
 100                                  "Activating latency workaround...\n");
 101                         vortex_fix_latency(vortex);
 102                         vortex_fix_agp_bridge(via);
 103                 }
 104         } else {
 105                 if (fix & 0x1)
 106                         vortex_fix_latency(vortex);
 107                 if ((fix & 0x2) && (via = pci_get_device(PCI_VENDOR_ID_VIA,
 108                                 PCI_DEVICE_ID_VIA_8365_1, NULL)))
 109                         vortex_fix_agp_bridge(via);
 110                 if ((fix & 0x4) && (via = pci_get_device(PCI_VENDOR_ID_VIA,
 111                                 PCI_DEVICE_ID_VIA_82C598_1, NULL)))
 112                         vortex_fix_agp_bridge(via);
 113                 if ((fix & 0x8) && (via = pci_get_device(PCI_VENDOR_ID_AMD,
 114                                 PCI_DEVICE_ID_AMD_FE_GATE_7007, NULL)))
 115                         vortex_fix_agp_bridge(via);
 116         }
 117         pci_dev_put(via);
 118 }
 119 
 120 // component-destructor
 121 // (see "Management of Cards and Components")
 122 static int snd_vortex_dev_free(struct snd_device *device)
 123 {
 124         vortex_t *vortex = device->device_data;
 125 
 126         vortex_gameport_unregister(vortex);
 127         vortex_core_shutdown(vortex);
 128         // Take down PCI interface.
 129         free_irq(vortex->irq, vortex);
 130         iounmap(vortex->mmio);
 131         pci_release_regions(vortex->pci_dev);
 132         pci_disable_device(vortex->pci_dev);
 133         kfree(vortex);
 134 
 135         return 0;
 136 }
 137 
 138 // chip-specific constructor
 139 // (see "Management of Cards and Components")
 140 static int
 141 snd_vortex_create(struct snd_card *card, struct pci_dev *pci, vortex_t ** rchip)
 142 {
 143         vortex_t *chip;
 144         int err;
 145         static struct snd_device_ops ops = {
 146                 .dev_free = snd_vortex_dev_free,
 147         };
 148 
 149         *rchip = NULL;
 150 
 151         // check PCI availability (DMA).
 152         if ((err = pci_enable_device(pci)) < 0)
 153                 return err;
 154         if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 ||
 155             dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) {
 156                 dev_err(card->dev, "error to set DMA mask\n");
 157                 pci_disable_device(pci);
 158                 return -ENXIO;
 159         }
 160 
 161         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 162         if (chip == NULL) {
 163                 pci_disable_device(pci);
 164                 return -ENOMEM;
 165         }
 166 
 167         chip->card = card;
 168 
 169         // initialize the stuff
 170         chip->pci_dev = pci;
 171         chip->io = pci_resource_start(pci, 0);
 172         chip->vendor = pci->vendor;
 173         chip->device = pci->device;
 174         chip->card = card;
 175         chip->irq = -1;
 176 
 177         // (1) PCI resource allocation
 178         // Get MMIO area
 179         //
 180         if ((err = pci_request_regions(pci, CARD_NAME_SHORT)) != 0)
 181                 goto regions_out;
 182 
 183         chip->mmio = pci_ioremap_bar(pci, 0);
 184         if (!chip->mmio) {
 185                 dev_err(card->dev, "MMIO area remap failed.\n");
 186                 err = -ENOMEM;
 187                 goto ioremap_out;
 188         }
 189 
 190         /* Init audio core.
 191          * This must be done before we do request_irq otherwise we can get spurious
 192          * interrupts that we do not handle properly and make a mess of things */
 193         if ((err = vortex_core_init(chip)) != 0) {
 194                 dev_err(card->dev, "hw core init failed\n");
 195                 goto core_out;
 196         }
 197 
 198         if ((err = request_irq(pci->irq, vortex_interrupt,
 199                                IRQF_SHARED, KBUILD_MODNAME,
 200                                chip)) != 0) {
 201                 dev_err(card->dev, "cannot grab irq\n");
 202                 goto irq_out;
 203         }
 204         chip->irq = pci->irq;
 205 
 206         pci_set_master(pci);
 207         // End of PCI setup.
 208 
 209         // Register alsa root device.
 210         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 211                 goto alloc_out;
 212         }
 213 
 214         *rchip = chip;
 215 
 216         return 0;
 217 
 218       alloc_out:
 219         free_irq(chip->irq, chip);
 220       irq_out:
 221         vortex_core_shutdown(chip);
 222       core_out:
 223         iounmap(chip->mmio);
 224       ioremap_out:
 225         pci_release_regions(chip->pci_dev);
 226       regions_out:
 227         pci_disable_device(chip->pci_dev);
 228         //FIXME: this not the right place to unregister the gameport
 229         vortex_gameport_unregister(chip);
 230         kfree(chip);
 231         return err;
 232 }
 233 
 234 // constructor -- see "Constructor" sub-section
 235 static int
 236 snd_vortex_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 237 {
 238         static int dev;
 239         struct snd_card *card;
 240         vortex_t *chip;
 241         int err;
 242 
 243         // (1)
 244         if (dev >= SNDRV_CARDS)
 245                 return -ENODEV;
 246         if (!enable[dev]) {
 247                 dev++;
 248                 return -ENOENT;
 249         }
 250         // (2)
 251         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 252                            0, &card);
 253         if (err < 0)
 254                 return err;
 255 
 256         // (3)
 257         if ((err = snd_vortex_create(card, pci, &chip)) < 0) {
 258                 snd_card_free(card);
 259                 return err;
 260         }
 261         snd_vortex_workaround(pci, pcifix[dev]);
 262 
 263         // Card details needed in snd_vortex_midi
 264         strcpy(card->driver, CARD_NAME_SHORT);
 265         sprintf(card->shortname, "Aureal Vortex %s", CARD_NAME_SHORT);
 266         sprintf(card->longname, "%s at 0x%lx irq %i",
 267                 card->shortname, chip->io, chip->irq);
 268 
 269         // (4) Alloc components.
 270         err = snd_vortex_mixer(chip);
 271         if (err < 0) {
 272                 snd_card_free(card);
 273                 return err;
 274         }
 275         // ADB pcm.
 276         err = snd_vortex_new_pcm(chip, VORTEX_PCM_ADB, NR_PCM);
 277         if (err < 0) {
 278                 snd_card_free(card);
 279                 return err;
 280         }
 281 #ifndef CHIP_AU8820
 282         // ADB SPDIF
 283         if ((err = snd_vortex_new_pcm(chip, VORTEX_PCM_SPDIF, 1)) < 0) {
 284                 snd_card_free(card);
 285                 return err;
 286         }
 287         // A3D
 288         if ((err = snd_vortex_new_pcm(chip, VORTEX_PCM_A3D, NR_A3D)) < 0) {
 289                 snd_card_free(card);
 290                 return err;
 291         }
 292 #endif
 293         /*
 294            // ADB I2S
 295            if ((err = snd_vortex_new_pcm(chip, VORTEX_PCM_I2S, 1)) < 0) {
 296            snd_card_free(card);
 297            return err;
 298            }
 299          */
 300 #ifndef CHIP_AU8810
 301         // WT pcm.
 302         if ((err = snd_vortex_new_pcm(chip, VORTEX_PCM_WT, NR_WT)) < 0) {
 303                 snd_card_free(card);
 304                 return err;
 305         }
 306 #endif
 307         if ((err = snd_vortex_midi(chip)) < 0) {
 308                 snd_card_free(card);
 309                 return err;
 310         }
 311 
 312         vortex_gameport_register(chip);
 313 
 314 #if 0
 315         if (snd_seq_device_new(card, 1, SNDRV_SEQ_DEV_ID_VORTEX_SYNTH,
 316                                sizeof(snd_vortex_synth_arg_t), &wave) < 0
 317             || wave == NULL) {
 318                 dev_err(card->dev, "Can't initialize Aureal wavetable synth\n");
 319         } else {
 320                 snd_vortex_synth_arg_t *arg;
 321 
 322                 arg = SNDRV_SEQ_DEVICE_ARGPTR(wave);
 323                 strcpy(wave->name, "Aureal Synth");
 324                 arg->hwptr = vortex;
 325                 arg->index = 1;
 326                 arg->seq_ports = seq_ports[dev];
 327                 arg->max_voices = max_synth_voices[dev];
 328         }
 329 #endif
 330 
 331         // (5)
 332         if ((err = pci_read_config_word(pci, PCI_DEVICE_ID,
 333                                   &(chip->device))) < 0) {
 334                 snd_card_free(card);
 335                 return err;
 336         }       
 337         if ((err = pci_read_config_word(pci, PCI_VENDOR_ID,
 338                                   &(chip->vendor))) < 0) {
 339                 snd_card_free(card);
 340                 return err;
 341         }
 342         chip->rev = pci->revision;
 343 #ifdef CHIP_AU8830
 344         if ((chip->rev) != 0xfe && (chip->rev) != 0xfa) {
 345                 dev_alert(card->dev,
 346                           "The revision (%x) of your card has not been seen before.\n",
 347                        chip->rev);
 348                 dev_alert(card->dev,
 349                           "Please email the results of 'lspci -vv' to openvortex-dev@nongnu.org.\n");
 350                 snd_card_free(card);
 351                 err = -ENODEV;
 352                 return err;
 353         }
 354 #endif
 355 
 356         // (6)
 357         if ((err = snd_card_register(card)) < 0) {
 358                 snd_card_free(card);
 359                 return err;
 360         }
 361         // (7)
 362         pci_set_drvdata(pci, card);
 363         dev++;
 364         vortex_connect_default(chip, 1);
 365         vortex_enable_int(chip);
 366         return 0;
 367 }
 368 
 369 // destructor -- see "Destructor" sub-section
 370 static void snd_vortex_remove(struct pci_dev *pci)
 371 {
 372         snd_card_free(pci_get_drvdata(pci));
 373 }
 374 
 375 // pci_driver definition
 376 static struct pci_driver vortex_driver = {
 377         .name = KBUILD_MODNAME,
 378         .id_table = snd_vortex_ids,
 379         .probe = snd_vortex_probe,
 380         .remove = snd_vortex_remove,
 381 };
 382 
 383 module_pci_driver(vortex_driver);