release/src-rt-6.x/linux/linux-2.6/sound/drivers/opl4/opl4_lib.c

   1 /*
   2  * Functions for accessing OPL4 devices
   3  * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  */
  19
  20 #include "opl4_local.h"
  21 #include <sound/initval.h>
  22 #include <linux/ioport.h>
  23 #include <linux/init.h>
  24 #include <asm/io.h>
  25
  26 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  27 MODULE_DESCRIPTION("OPL4 driver");
  28 MODULE_LICENSE("GPL");
  29
  30 static void inline snd_opl4_wait(struct snd_opl4 *opl4)
  31 {
  32         int timeout = 10;
  33         while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
  34                 ;
  35 }
  36
  37 void snd_opl4_write(struct snd_opl4 *opl4, u8 reg, u8 value)
  38 {
  39         snd_opl4_wait(opl4);
  40         outb(reg, opl4->pcm_port);
  41
  42         snd_opl4_wait(opl4);
  43         outb(value, opl4->pcm_port + 1);
  44 }
  45
  46 EXPORT_SYMBOL(snd_opl4_write);
  47
  48 u8 snd_opl4_read(struct snd_opl4 *opl4, u8 reg)
  49 {
  50         snd_opl4_wait(opl4);
  51         outb(reg, opl4->pcm_port);
  52
  53         snd_opl4_wait(opl4);
  54         return inb(opl4->pcm_port + 1);
  55 }
  56
  57 EXPORT_SYMBOL(snd_opl4_read);
  58
  59 void snd_opl4_read_memory(struct snd_opl4 *opl4, char *buf, int offset, int size)
  60 {
  61         unsigned long flags;
  62         u8 memcfg;
  63
  64         spin_lock_irqsave(&opl4->reg_lock, flags);
  65
  66         memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
  67         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
  68
  69         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
  70         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
  71         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
  72
  73         snd_opl4_wait(opl4);
  74         outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
  75         snd_opl4_wait(opl4);
  76         insb(opl4->pcm_port + 1, buf, size);
  77
  78         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
  79
  80         spin_unlock_irqrestore(&opl4->reg_lock, flags);
  81 }
  82
  83 EXPORT_SYMBOL(snd_opl4_read_memory);
  84
  85 void snd_opl4_write_memory(struct snd_opl4 *opl4, const char *buf, int offset, int size)
  86 {
  87         unsigned long flags;
  88         u8 memcfg;
  89
  90         spin_lock_irqsave(&opl4->reg_lock, flags);
  91
  92         memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
  93         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
  94
  95         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
  96         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
  97         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
  98
  99         snd_opl4_wait(opl4);
 100         outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
 101         snd_opl4_wait(opl4);
 102         outsb(opl4->pcm_port + 1, buf, size);
 103
 104         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
 105
 106         spin_unlock_irqrestore(&opl4->reg_lock, flags);
 107 }
 108
 109 EXPORT_SYMBOL(snd_opl4_write_memory);
 110
 111 static void snd_opl4_enable_opl4(struct snd_opl4 *opl4)
 112 {
 113         outb(OPL3_REG_MODE, opl4->fm_port + 2);
 114         inb(opl4->fm_port);
 115         inb(opl4->fm_port);
 116         outb(OPL3_OPL3_ENABLE | OPL3_OPL4_ENABLE, opl4->fm_port + 3);
 117         inb(opl4->fm_port);
 118         inb(opl4->fm_port);
 119 }
 120
 121 static int snd_opl4_detect(struct snd_opl4 *opl4)
 122 {
 123         u8 id1, id2;
 124
 125         snd_opl4_enable_opl4(opl4);
 126
 127         id1 = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
 128         snd_printdd("OPL4[02]=%02x\n", id1);
 129         switch (id1 & OPL4_DEVICE_ID_MASK) {
 130         case 0x20:
 131                 opl4->hardware = OPL3_HW_OPL4;
 132                 break;
 133         case 0x40:
 134                 opl4->hardware = OPL3_HW_OPL4_ML;
 135                 break;
 136         default:
 137                 return -ENODEV;
 138         }
 139
 140         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x00);
 141         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0xff);
 142         id1 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_FM);
 143         id2 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_PCM);
 144         snd_printdd("OPL4 id1=%02x id2=%02x\n", id1, id2);
 145         if (id1 != 0x00 || id2 != 0xff)
 146                 return -ENODEV;
 147
 148         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x3f);
 149         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0x3f);
 150         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, 0x00);
 151         return 0;
 152 }
 153
 154 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
 155 static void snd_opl4_seq_dev_free(struct snd_seq_device *seq_dev)
 156 {
 157         struct snd_opl4 *opl4 = seq_dev->private_data;
 158         opl4->seq_dev = NULL;
 159 }
 160
 161 static int snd_opl4_create_seq_dev(struct snd_opl4 *opl4, int seq_device)
 162 {
 163         opl4->seq_dev_num = seq_device;
 164         if (snd_seq_device_new(opl4->card, seq_device, SNDRV_SEQ_DEV_ID_OPL4,
 165                                sizeof(struct snd_opl4 *), &opl4->seq_dev) >= 0) {
 166                 strcpy(opl4->seq_dev->name, "OPL4 Wavetable");
 167                 *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(opl4->seq_dev) = opl4;
 168                 opl4->seq_dev->private_data = opl4;
 169                 opl4->seq_dev->private_free = snd_opl4_seq_dev_free;
 170         }
 171         return 0;
 172 }
 173 #endif
 174
 175 static void snd_opl4_free(struct snd_opl4 *opl4)
 176 {
 177 #ifdef CONFIG_PROC_FS
 178         snd_opl4_free_proc(opl4);
 179 #endif
 180         release_and_free_resource(opl4->res_fm_port);
 181         release_and_free_resource(opl4->res_pcm_port);
 182         kfree(opl4);
 183 }
 184
 185 static int snd_opl4_dev_free(struct snd_device *device)
 186 {
 187         struct snd_opl4 *opl4 = device->device_data;
 188         snd_opl4_free(opl4);
 189         return 0;
 190 }
 191
 192 int snd_opl4_create(struct snd_card *card,
 193                     unsigned long fm_port, unsigned long pcm_port,
 194                     int seq_device,
 195                     struct snd_opl3 **ropl3, struct snd_opl4 **ropl4)
 196 {
 197         struct snd_opl4 *opl4;
 198         struct snd_opl3 *opl3;
 199         int err;
 200         static struct snd_device_ops ops = {
 201                 .dev_free = snd_opl4_dev_free
 202         };
 203
 204         if (ropl3)
 205                 *ropl3 = NULL;
 206         if (ropl4)
 207                 *ropl4 = NULL;
 208
 209         opl4 = kzalloc(sizeof(*opl4), GFP_KERNEL);
 210         if (!opl4)
 211                 return -ENOMEM;
 212
 213         opl4->res_fm_port = request_region(fm_port, 8, "OPL4 FM");
 214         opl4->res_pcm_port = request_region(pcm_port, 8, "OPL4 PCM/MIX");
 215         if (!opl4->res_fm_port || !opl4->res_pcm_port) {
 216                 snd_printk(KERN_ERR "opl4: can't grab ports 0x%lx, 0x%lx\n", fm_port, pcm_port);
 217                 snd_opl4_free(opl4);
 218                 return -EBUSY;
 219         }
 220
 221         opl4->card = card;
 222         opl4->fm_port = fm_port;
 223         opl4->pcm_port = pcm_port;
 224         spin_lock_init(&opl4->reg_lock);
 225         mutex_init(&opl4->access_mutex);
 226
 227         err = snd_opl4_detect(opl4);
 228         if (err < 0) {
 229                 snd_opl4_free(opl4);
 230                 snd_printd("OPL4 chip not detected at %#lx/%#lx\n", fm_port, pcm_port);
 231                 return err;
 232         }
 233
 234         err = snd_device_new(card, SNDRV_DEV_CODEC, opl4, &ops);
 235         if (err < 0) {
 236                 snd_opl4_free(opl4);
 237                 return err;
 238         }
 239
 240         err = snd_opl3_create(card, fm_port, fm_port + 2, opl4->hardware, 1, &opl3);
 241         if (err < 0) {
 242                 snd_device_free(card, opl4);
 243                 return err;
 244         }
 245
 246         /* opl3 initialization disabled opl4, so reenable */
 247         snd_opl4_enable_opl4(opl4);
 248
 249         snd_opl4_create_mixer(opl4);
 250 #ifdef CONFIG_PROC_FS
 251         snd_opl4_create_proc(opl4);
 252 #endif
 253
 254 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
 255         opl4->seq_client = -1;
 256         if (opl4->hardware < OPL3_HW_OPL4_ML)
 257                 snd_opl4_create_seq_dev(opl4, seq_device);
 258 #endif
 259
 260         if (ropl3)
 261                 *ropl3 = opl3;
 262         if (ropl4)
 263                 *ropl4 = opl4;
 264         return 0;
 265 }
 266
 267 EXPORT_SYMBOL(snd_opl4_create);
 268
 269 static int __init alsa_opl4_init(void)
 270 {
 271         return 0;
 272 }
 273
 274 static void __exit alsa_opl4_exit(void)
 275 {
 276 }
 277
 278 module_init(alsa_opl4_init)
 279 module_exit(alsa_opl4_exit)