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 u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
  69 {
  70         outb(reg, io + 4);
  71         udelay(20);
  72         reg = inb(io + 5);
  73         udelay(20);
  74         return reg;
  75 }
  76
  77 static int snd_cs5530_create(struct snd_card *card,
  78                              struct pci_dev *pci)
  79 {
  80         struct snd_cs5530 *chip = card->private_data;
  81         unsigned long sb_base;
  82         u8 irq, dma8, dma16 = 0;
  83         u16 map;
  84         void __iomem *mem;
  85         int err;
  86
  87         err = pcim_enable_device(pci);
  88         if (err < 0)
  89                 return err;
  90
  91         chip->card = card;
  92         chip->pci = pci;
  93
  94         err = pcim_iomap_regions(pci, 1 << 0, "CS5530");
  95         if (err < 0)
  96                 return err;
  97         chip->pci_base = pci_resource_start(pci, 0);
  98         mem = pcim_iomap_table(pci)[0];
  99         map = readw(mem + 0x18);
 100
 101         /* Map bits
 102                 0:1     * 0x20 + 0x200 = sb base
 103                 2       sb enable
 104                 3       adlib enable
 105                 5       MPU enable 0x330
 106                 6       MPU enable 0x300
 107
 108            The other bits may be used internally so must be masked */
 109
 110         sb_base = 0x220 + 0x20 * (map & 3);
 111
 112         if (map & (1<<2))
 113                 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
 114         else {
 115                 dev_err(card->dev, "Could not find XpressAudio!\n");
 116                 return -ENODEV;
 117         }
 118
 119         if (map & (1<<5))
 120                 dev_info(card->dev, "MPU at 0x300\n");
 121         else if (map & (1<<6))
 122                 dev_info(card->dev, "MPU at 0x330\n");
 123
 124         irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 125         dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
 126
 127         if (dma8 & 0x20)
 128                 dma16 = 5;
 129         else if (dma8 & 0x40)
 130                 dma16 = 6;
 131         else if (dma8 & 0x80)
 132                 dma16 = 7;
 133         else {
 134                 dev_err(card->dev, "No 16bit DMA enabled\n");
 135                 return -ENODEV;
 136         }
 137
 138         if (dma8 & 0x01)
 139                 dma8 = 0;
 140         else if (dma8 & 02)
 141                 dma8 = 1;
 142         else if (dma8 & 0x08)
 143                 dma8 = 3;
 144         else {
 145                 dev_err(card->dev, "No 8bit DMA enabled\n");
 146                 return -ENODEV;
 147         }
 148
 149         if (irq & 1)
 150                 irq = 9;
 151         else if (irq & 2)
 152                 irq = 5;
 153         else if (irq & 4)
 154                 irq = 7;
 155         else if (irq & 8)
 156                 irq = 10;
 157         else {
 158                 dev_err(card->dev, "SoundBlaster IRQ not set\n");
 159                 return -ENODEV;
 160         }
 161
 162         dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
 163
 164         err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 165                                                 dma16, SB_HW_CS5530, &chip->sb);
 166         if (err < 0) {
 167                 dev_err(card->dev, "Could not create SoundBlaster\n");
 168                 return err;
 169         }
 170
 171         err = snd_sb16dsp_pcm(chip->sb, 0);
 172         if (err < 0) {
 173                 dev_err(card->dev, "Could not create PCM\n");
 174                 return err;
 175         }
 176
 177         err = snd_sbmixer_new(chip->sb);
 178         if (err < 0) {
 179                 dev_err(card->dev, "Could not create Mixer\n");
 180                 return err;
 181         }
 182
 183         return 0;
 184 }
 185
 186 static int snd_cs5530_probe(struct pci_dev *pci,
 187                             const struct pci_device_id *pci_id)
 188 {
 189         static int dev;
 190         struct snd_card *card;
 191         struct snd_cs5530 *chip;
 192         int err;
 193
 194         if (dev >= SNDRV_CARDS)
 195                 return -ENODEV;
 196         if (!enable[dev]) {
 197                 dev++;
 198                 return -ENOENT;
 199         }
 200
 201         err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 202                                 sizeof(*chip), &card);
 203         if (err < 0)
 204                 return err;
 205         chip = card->private_data;
 206
 207         err = snd_cs5530_create(card, pci);
 208         if (err < 0)
 209                 return err;
 210
 211         strcpy(card->driver, "CS5530");
 212         strcpy(card->shortname, "CS5530 Audio");
 213         sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 214
 215         err = snd_card_register(card);
 216         if (err < 0)
 217                 return err;
 218         pci_set_drvdata(pci, card);
 219         dev++;
 220         return 0;
 221 }
 222
 223 static struct pci_driver cs5530_driver = {
 224         .name = KBUILD_MODNAME,
 225         .id_table = snd_cs5530_ids,
 226         .probe = snd_cs5530_probe,
 227 };
 228
 229 module_pci_driver(cs5530_driver);