drivers/sound/via82cxxx.c

   1 /*
   2  * Support for VIA 82Cxxx Audio Codecs
   3  * Copyright 1999 Jeff Garzik <jgarzik@pobox.com>
   4  *
   5  * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
   6  * See the "COPYING" file distributed with this software for more info.
   7  *
   8  ********************************************************************
   9  *
  10  * TODO:
  11  *
  12  *      - Integrate AC'97 support, when AC'97 interface released
  13  *
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/delay.h>
  18 #include <linux/errno.h>
  19 #include <linux/fs.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/init.h>
  23
  24 #include <asm/io.h>
  25
  26 #include "sound_config.h"
  27 #include "soundmodule.h"
  28 #include "sb.h"
  29
  30 #ifndef SOUND_LOCK
  31 #define SOUND_LOCK do {} while (0)
  32 #define SOUND_LOCK_END do {} while (0)
  33 #endif
  34
  35 #define MAX_CARDS       2
  36
  37 #define PFX             "via82cxxx: "
  38
  39 #define VIA_VERSION     "1.0.0"
  40 #define VIA_CARD_NAME   "VIA 82Cxxx Audio driver " VIA_VERSION
  41
  42 #define VIA_FUNC_ENABLE         0x42
  43 #define VIA_PNP_CONTROL         0x43
  44
  45 #define VIA_CR42_SB_ENABLE      0x01
  46 #define VIA_CR42_MIDI_ENABLE    0x02
  47 #define VIA_CR42_FM_ENABLE      0x04
  48
  49 #define via_probe_midi probe_uart401
  50 #define via_attach_midi attach_uart401
  51 #define via_unload_midi unload_uart401
  52
  53 static struct address_info      sb_data[MAX_CARDS];
  54 static struct address_info      opl3_data[MAX_CARDS];
  55 static unsigned                 cards = 0;
  56
  57
  58 static void __init via_attach_sb(struct address_info *hw_config)
  59 {
  60         if(!sb_dsp_init(hw_config))
  61                 hw_config->slots[0] = -1;
  62 }
  63
  64
  65 static int __init via_probe_sb(struct address_info *hw_config)
  66 {
  67         if (check_region(hw_config->io_base, 16))
  68         {
  69                 printk(KERN_DEBUG PFX "SBPro port 0x%x is already in use\n",
  70                        hw_config->io_base);
  71                 return 0;
  72         }
  73         return sb_dsp_detect(hw_config, 0, 0);
  74 }
  75
  76
  77 static void __exit via_unload_sb(struct address_info *hw_config, int unload_mpu)
  78 {
  79         if(hw_config->slots[0]!=-1)
  80                 sb_dsp_unload(hw_config, unload_mpu);
  81 }
  82
  83
  84 static int __init via82cxxx_install (struct pci_dev *pcidev)
  85 {
  86         int sb_io_base = 0;
  87         int sb_irq = 0;
  88         int sb_dma = 0;
  89         int midi_base = 0;
  90         u8 tmp8;
  91
  92         memset (&sb_data[cards], 0, sizeof (struct address_info));
  93         memset (&opl3_data[cards], 0, sizeof (struct address_info));
  94
  95         sb_data[cards].name = opl3_data[cards].name = VIA_CARD_NAME;
  96         opl3_data[cards].irq = -1;
  97
  98         /* turn on features, if not already */
  99         pci_read_config_byte (pcidev, VIA_FUNC_ENABLE, &tmp8);
 100         tmp8 |= VIA_CR42_SB_ENABLE | VIA_CR42_MIDI_ENABLE |
 101                 VIA_CR42_FM_ENABLE;
 102         pci_write_config_byte (pcidev, VIA_FUNC_ENABLE, tmp8);
 103
 104         /* read legacy PNP info byte */
 105         pci_read_config_byte (pcidev, VIA_PNP_CONTROL, &tmp8);
 106         pci_write_config_byte (pcidev, VIA_PNP_CONTROL, tmp8);
 107
 108         switch ((tmp8 >> 6) & 0x03) {
 109                 case 0: sb_irq = 5; break;
 110                 case 1: sb_irq = 7; break;
 111                 case 2: sb_irq = 9; break;
 112                 case 3: sb_irq = 10; break;
 113                 default: /* do nothing */ break;
 114         }
 115         switch ((tmp8 >> 4) & 0x03) {
 116                 case 0: sb_dma = 0; break;
 117                 case 1: sb_dma = 1; break;
 118                 case 2: sb_dma = 2; break;
 119                 case 3: sb_dma = 3; break;
 120                 default: /* do nothing */ break;
 121         }
 122         switch ((tmp8 >> 2) & 0x03) {
 123                 case 0: midi_base = 0x300; break;
 124                 case 1: midi_base = 0x310; break;
 125                 case 2: midi_base = 0x320; break;
 126                 case 3: midi_base = 0x330; break;
 127                 default: /* do nothing */ break;
 128         }
 129         switch (tmp8 & 0x03) {
 130                 case 0: sb_io_base = 0x220; break;
 131                 case 1: sb_io_base = 0x240; break;
 132                 case 2: sb_io_base = 0x260; break;
 133                 case 3: sb_io_base = 0x280; break;
 134                 default: /* do nothing */ break;
 135         }
 136
 137         udelay(100);
 138
 139         printk(KERN_INFO PFX "legacy "
 140                "MIDI: 0x%X, SB: 0x%X / %d IRQ / %d DMA\n",
 141                 midi_base, sb_io_base, sb_irq, sb_dma);
 142
 143         sb_data[cards].card_subtype = MDL_SBPRO;
 144         sb_data[cards].io_base = sb_io_base;
 145         sb_data[cards].irq = sb_irq;
 146         sb_data[cards].dma = sb_dma;
 147
 148         opl3_data[cards].io_base = midi_base;
 149
 150         /* register legacy SoundBlaster Pro */
 151         if (!via_probe_sb (&sb_data[cards])) {
 152                 printk (KERN_ERR PFX
 153                         "SB probe @ 0x%X failed, aborting\n",
 154                         sb_io_base);
 155                 return -1;
 156         }
 157         via_attach_sb (&sb_data[cards]);
 158
 159         /* register legacy MIDI */
 160         if (!via_probe_midi (&opl3_data[cards])) {
 161                 printk (KERN_ERR PFX
 162                         "MIDI probe @ 0x%X failed, aborting\n",
 163                         midi_base);
 164                 via_unload_sb (&sb_data[cards], 0);
 165                 return -1;
 166         }
 167         via_attach_midi (&opl3_data[cards]);
 168
 169         cards++;
 170         return 0;
 171 }
 172
 173
 174 /*
 175  *      This loop walks the PCI configuration database and finds where
 176  *      the sound cards are.
 177  */
 178
 179 static int __init probe_via82cxxx (void)
 180 {
 181         struct pci_dev *pcidev = NULL;
 182
 183         while ((pcidev = pci_find_device (PCI_VENDOR_ID_VIA,
 184                                           PCI_DEVICE_ID_VIA_82C686_5,
 185                                           pcidev)) != NULL) {
 186
 187                   if (via82cxxx_install (pcidev) != 0) {
 188                           printk (KERN_ERR PFX "audio init failed\n");
 189                           return -1;
 190                   }
 191
 192                   if (cards == MAX_CARDS) {
 193                           printk (KERN_DEBUG PFX "maximum number of cards reached\n");
 194                           break;
 195                   }
 196         }
 197
 198         return 0;
 199 }
 200
 201
 202 /*
 203  *      This function is called when the user or kernel loads the
 204  *      module into memory.
 205  */
 206
 207
 208 static int __init init_via82cxxx_module(void)
 209 {
 210         if (!pci_present ()) {
 211                 printk (KERN_DEBUG PFX "PCI not present, exiting\n");
 212                 return -ENODEV;
 213         }
 214
 215         if (probe_via82cxxx() != 0) {
 216                 printk(KERN_ERR PFX "probe failed, aborting\n");
 217                 /* XXX unload cards registered so far, if any */
 218                 return -ENODEV;
 219         }
 220
 221         if (cards == 0) {
 222                 printk(KERN_DEBUG PFX "No chips found, aborting\n");
 223                 return -ENODEV;
 224         }
 225
 226         printk (KERN_INFO PFX VIA_CARD_NAME " loaded\n");
 227
 228         /*
 229          *      Binds us to the sound subsystem
 230          */
 231         SOUND_LOCK;
 232         return 0;
 233 }
 234
 235 /*
 236  *      This is called when it is removed. It will only be removed
 237  *      when its use count is 0. For sound the SOUND_LOCK/SOUND_UNLOCK
 238  *      macros hide the entire work for this.
 239  */
 240
 241 static void __exit cleanup_via82cxxx_module(void)
 242 {
 243         int i;
 244
 245         for (i = 0; i < cards; i++)
 246                 via_unload_sb (&sb_data[i], 1);
 247
 248         /*
 249          *      Final clean up with the sound layer
 250          */
 251         SOUND_LOCK_END;
 252 }
 253
 254 module_init(init_via82cxxx_module);
 255 module_exit(cleanup_via82cxxx_module);
 256