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
  35 #include "sound_config.h"
  36
  37 #include "sb.h"
  38
  39 /*
  40  *      Read a soundblaster compatible mixer register.
  41  *      In this case we are actually reading an SMI trap
  42  *      not real hardware.
  43  */
  44
  45 static u8 __devinit mixer_read(unsigned long io, u8 reg)
  46 {
  47         outb(reg, io + 4);
  48         udelay(20);
  49         reg = inb(io + 5);
  50         udelay(20);
  51         return reg;
  52 }
  53
  54 static int __devinit probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  55 {
  56         struct address_info *hw_config;
  57         unsigned long base;
  58         void __iomem *mem;
  59         unsigned long io;
  60         u16 map;
  61         u8 irq, dma8, dma16;
  62         int oldquiet;
  63         extern int sb_be_quiet;
  64
  65         base = pci_resource_start(pdev, 0);
  66         if(base == 0UL)
  67                 return 1;
  68
  69         mem = ioremap(base, 128);
  70         if (!mem)
  71                 return 1;
  72         map = readw(mem + 0x18);        /* Read the SMI enables */
  73         iounmap(mem);
  74
  75         /* Map bits
  76                 0:1     * 0x20 + 0x200 = sb base
  77                 2       sb enable
  78                 3       adlib enable
  79                 5       MPU enable 0x330
  80                 6       MPU enable 0x300
  81
  82            The other bits may be used internally so must be masked */
  83
  84         io = 0x220 + 0x20 * (map & 3);
  85
  86         if(map & (1<<2))
  87                 printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io);
  88         else
  89                 return 1;
  90
  91         if(map & (1<<5))
  92                 printk(KERN_INFO "kahlua: MPU at 0x300\n");
  93         else if(map & (1<<6))
  94                 printk(KERN_INFO "kahlua: MPU at 0x330\n");
  95
  96         irq = mixer_read(io, 0x80) & 0x0F;
  97         dma8 = mixer_read(io, 0x81);
  98
  99         // printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8);
 100
 101         if(dma8 & 0x20)
 102                 dma16 = 5;
 103         else if(dma8 & 0x40)
 104                 dma16 = 6;
 105         else if(dma8 & 0x80)
 106                 dma16 = 7;
 107         else
 108         {
 109                 printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n");
 110                 return 1;
 111         }
 112
 113         if(dma8 & 0x01)
 114                 dma8 = 0;
 115         else if(dma8 & 0x02)
 116                 dma8 = 1;
 117         else if(dma8 & 0x08)
 118                 dma8 = 3;
 119         else
 120         {
 121                 printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n");
 122                 return 1;
 123         }
 124
 125         if(irq & 1)
 126                 irq = 9;
 127         else if(irq & 2)
 128                 irq = 5;
 129         else if(irq & 4)
 130                 irq = 7;
 131         else if(irq & 8)
 132                 irq = 10;
 133         else
 134         {
 135                 printk(KERN_ERR "kahlua: SB IRQ not set.\n");
 136                 return 1;
 137         }
 138
 139         printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n",
 140                 irq, dma8, dma16);
 141
 142         hw_config = kzalloc(sizeof(struct address_info), GFP_KERNEL);
 143         if(hw_config == NULL)
 144         {
 145                 printk(KERN_ERR "kahlua: out of memory.\n");
 146                 return 1;
 147         }
 148
 149         pci_set_drvdata(pdev, hw_config);
 150
 151         hw_config->io_base = io;
 152         hw_config->irq = irq;
 153         hw_config->dma = dma8;
 154         hw_config->dma2 = dma16;
 155         hw_config->name = "Cyrix XpressAudio";
 156         hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ;
 157
 158         if (!request_region(io, 16, "soundblaster"))
 159                 goto err_out_free;
 160
 161         if(sb_dsp_detect(hw_config, 0, 0, NULL)==0)
 162         {
 163                 printk(KERN_ERR "kahlua: audio not responding.\n");
 164                 release_region(io, 16);
 165                 goto err_out_free;
 166         }
 167
 168         oldquiet = sb_be_quiet;
 169         sb_be_quiet = 1;
 170         if(sb_dsp_init(hw_config, THIS_MODULE))
 171         {
 172                 sb_be_quiet = oldquiet;
 173                 goto err_out_free;
 174         }
 175         sb_be_quiet = oldquiet;
 176
 177         return 0;
 178
 179 err_out_free:
 180         pci_set_drvdata(pdev, NULL);
 181         kfree(hw_config);
 182         return 1;
 183 }
 184
 185 static void __devexit 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         pci_set_drvdata(pdev, NULL);
 190         kfree(hw_config);
 191 }
 192
 193 MODULE_AUTHOR("Alan Cox");
 194 MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio");
 195 MODULE_LICENSE("GPL");
 196
 197 /*
 198  *      5530 only. The 5510/5520 decode is different.
 199  */
 200
 201 static struct pci_device_id id_tbl[] = {
 202         { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 },
 203         { }
 204 };
 205
 206 MODULE_DEVICE_TABLE(pci, id_tbl);
 207
 208 static struct pci_driver kahlua_driver = {
 209         .name           = "kahlua",
 210         .id_table       = id_tbl,
 211         .probe          = probe_one,
 212         .remove         = __devexit_p(remove_one),
 213 };
 214
 215
 216 static int __init kahlua_init_module(void)
 217 {
 218         printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n");
 219         return pci_register_driver(&kahlua_driver);
 220 }
 221
 222 static void __devexit kahlua_cleanup_module(void)
 223 {
 224         pci_unregister_driver(&kahlua_driver);
 225 }
 226
 227
 228 module_init(kahlua_init_module);
 229 module_exit(kahlua_cleanup_module);
 230