sound/oss/kahlua.c

   1 /*
   2  *      Initialisation code for Cyrix/NatSemi VSA1 softaudio
   3  *
   4  *      (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
   5  *
   6  * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
   7  * The older version (VSA1) provides fairly good soundblaster emulation
   8  * although there are a couple of bugs: large DMA buffers break record,
   9  * and the MPU event handling seems suspect. VSA2 allows the native driver
  10  * to control the AC97 audio engine directly and requires a different driver.
  11  *
  12  * Thanks to National Semiconductor for providing the needed information
  13  * on the XpressAudio(tm) internals.
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU General Public License as published by the
  17  * Free Software Foundation; either version 2, or (at your option) any
  18  * later version.
  19  *
  20  * This program is distributed in the hope that it will be useful, but
  21  * WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * General Public License for more details.
  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/init.h>
  32 #include <linux/module.h>
  33 #include <linux/pci.h>
  34 #include <linux/slab.h>
  35
  36 #include "sound_config.h"
  37
  38 #include "sb.h"
  39
  40 /*
  41  *      Read a soundblaster compatible mixer register.
  42  *      In this case we are actually reading an SMI trap
  43  *      not real hardware.
  44  */
  45
  46 static u8 mixer_read(unsigned long io, u8 reg)
  47 {
  48         outb(reg, io + 4);
  49         udelay(20);
  50         reg = inb(io + 5);
  51         udelay(20);
  52         return reg;
  53 }
  54
  55 static int probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  56 {
  57         struct address_info *hw_config;
  58         unsigned long base;
  59         void __iomem *mem;
  60         unsigned long io;
  61         u16 map;
  62         u8 irq, dma8, dma16;
  63         int oldquiet;
  64         extern int sb_be_quiet;
  65
  66         base = pci_resource_start(pdev, 0);
  67         if(base == 0UL)
  68                 return 1;
  69
  70         mem = ioremap(base, 128);
  71         if (!mem)
  72                 return 1;
  73         map = readw(mem + 0x18);        /* Read the SMI enables */
  74         iounmap(mem);
  75
  76         /* Map bits
  77                 0:1     * 0x20 + 0x200 = sb base
  78                 2       sb enable
  79                 3       adlib enable
  80                 5       MPU enable 0x330
  81                 6       MPU enable 0x300
  82
  83            The other bits may be used internally so must be masked */
  84
  85         io = 0x220 + 0x20 * (map & 3);
  86
  87         if(map & (1<<2))
  88                 printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io);
  89         else
  90                 return 1;
  91
  92         if(map & (1<<5))
  93                 printk(KERN_INFO "kahlua: MPU at 0x300\n");
  94         else if(map & (1<<6))
  95                 printk(KERN_INFO "kahlua: MPU at 0x330\n");
  96
  97         irq = mixer_read(io, 0x80) & 0x0F;
  98         dma8 = mixer_read(io, 0x81);
  99
 100         // printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8);
 101
 102         if(dma8 & 0x20)
 103                 dma16 = 5;
 104         else if(dma8 & 0x40)
 105                 dma16 = 6;
 106         else if(dma8 & 0x80)
 107                 dma16 = 7;
 108         else
 109         {
 110                 printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n");
 111                 return 1;
 112         }
 113
 114         if(dma8 & 0x01)
 115                 dma8 = 0;
 116         else if(dma8 & 0x02)
 117                 dma8 = 1;
 118         else if(dma8 & 0x08)
 119                 dma8 = 3;
 120         else
 121         {
 122                 printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n");
 123                 return 1;
 124         }
 125
 126         if(irq & 1)
 127                 irq = 9;
 128         else if(irq & 2)
 129                 irq = 5;
 130         else if(irq & 4)
 131                 irq = 7;
 132         else if(irq & 8)
 133                 irq = 10;
 134         else
 135         {
 136                 printk(KERN_ERR "kahlua: SB IRQ not set.\n");
 137                 return 1;
 138         }
 139
 140         printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n",
 141                 irq, dma8, dma16);
 142
 143         hw_config = kzalloc(sizeof(struct address_info), GFP_KERNEL);
 144         if(hw_config == NULL)
 145         {
 146                 printk(KERN_ERR "kahlua: out of memory.\n");
 147                 return 1;
 148         }
 149
 150         pci_set_drvdata(pdev, hw_config);
 151
 152         hw_config->io_base = io;
 153         hw_config->irq = irq;
 154         hw_config->dma = dma8;
 155         hw_config->dma2 = dma16;
 156         hw_config->name = "Cyrix XpressAudio";
 157         hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ;
 158
 159         if (!request_region(io, 16, "soundblaster"))
 160                 goto err_out_free;
 161
 162         if(sb_dsp_detect(hw_config, 0, 0, NULL)==0)
 163         {
 164                 printk(KERN_ERR "kahlua: audio not responding.\n");
 165                 release_region(io, 16);
 166                 goto err_out_free;
 167         }
 168
 169         oldquiet = sb_be_quiet;
 170         sb_be_quiet = 1;
 171         if(sb_dsp_init(hw_config, THIS_MODULE))
 172         {
 173                 sb_be_quiet = oldquiet;
 174                 goto err_out_free;
 175         }
 176         sb_be_quiet = oldquiet;
 177
 178         return 0;
 179
 180 err_out_free:
 181         kfree(hw_config);
 182         return 1;
 183 }
 184
 185 static void remove_one(struct pci_dev *pdev)
 186 {
 187         struct address_info *hw_config = pci_get_drvdata(pdev);
 188         sb_dsp_unload(hw_config, 0);
 189         kfree(hw_config);
 190 }
 191
 192 MODULE_AUTHOR("Alan Cox");
 193 MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio");
 194 MODULE_LICENSE("GPL");
 195
 196 /*
 197  *      5530 only. The 5510/5520 decode is different.
 198  */
 199
 200 static DEFINE_PCI_DEVICE_TABLE(id_tbl) = {
 201         { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 },
 202         { }
 203 };
 204
 205 MODULE_DEVICE_TABLE(pci, id_tbl);
 206
 207 static struct pci_driver kahlua_driver = {
 208         .name           = "kahlua",
 209         .id_table       = id_tbl,
 210         .probe          = probe_one,
 211         .remove         = remove_one,
 212 };
 213
 214
 215 static int __init kahlua_init_module(void)
 216 {
 217         printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n");
 218         return pci_register_driver(&kahlua_driver);
 219 }
 220
 221 static void kahlua_cleanup_module(void)
 222 {
 223         pci_unregister_driver(&kahlua_driver);
 224 }
 225
 226
 227 module_init(kahlua_init_module);
 228 module_exit(kahlua_cleanup_module);
 229