kernel/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/slab.h>
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/io.h>
  27
  28 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  29 MODULE_DESCRIPTION("OPL4 driver");
  30 MODULE_LICENSE("GPL");
  31
  32 static void inline snd_opl4_wait(struct snd_opl4 *opl4)
  33 {
  34         int timeout = 10;
  35         while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
  36                 ;
  37 }
  38
  39 void snd_opl4_write(struct snd_opl4 *opl4, u8 reg, u8 value)
  40 {
  41         snd_opl4_wait(opl4);
  42         outb(reg, opl4->pcm_port);
  43
  44         snd_opl4_wait(opl4);
  45         outb(value, opl4->pcm_port + 1);
  46 }
  47
  48 EXPORT_SYMBOL(snd_opl4_write);
  49
  50 u8 snd_opl4_read(struct snd_opl4 *opl4, u8 reg)
  51 {
  52         snd_opl4_wait(opl4);
  53         outb(reg, opl4->pcm_port);
  54
  55         snd_opl4_wait(opl4);
  56         return inb(opl4->pcm_port + 1);
  57 }
  58
  59 EXPORT_SYMBOL(snd_opl4_read);
  60
  61 void snd_opl4_read_memory(struct snd_opl4 *opl4, char *buf, int offset, int size)
  62 {
  63         unsigned long flags;
  64         u8 memcfg;
  65
  66         spin_lock_irqsave(&opl4->reg_lock, flags);
  67
  68         memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
  69         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
  70
  71         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
  72         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
  73         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
  74
  75         snd_opl4_wait(opl4);
  76         outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
  77         snd_opl4_wait(opl4);
  78         insb(opl4->pcm_port + 1, buf, size);
  79
  80         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
  81
  82         spin_unlock_irqrestore(&opl4->reg_lock, flags);
  83 }
  84
  85 EXPORT_SYMBOL(snd_opl4_read_memory);
  86
  87 void snd_opl4_write_memory(struct snd_opl4 *opl4, const char *buf, int offset, int size)
  88 {
  89         unsigned long flags;
  90         u8 memcfg;
  91
  92         spin_lock_irqsave(&opl4->reg_lock, flags);
  93
  94         memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
  95         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
  96
  97         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
  98         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
  99         snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
 100
 101         snd_opl4_wait(opl4);
 102         outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
 103         snd_opl4_wait(opl4);
 104         outsb(opl4->pcm_port + 1, buf, size);
 105
 106         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
 107
 108         spin_unlock_irqrestore(&opl4->reg_lock, flags);
 109 }
 110
 111 EXPORT_SYMBOL(snd_opl4_write_memory);
 112
 113 static void snd_opl4_enable_opl4(struct snd_opl4 *opl4)
 114 {
 115         outb(OPL3_REG_MODE, opl4->fm_port + 2);
 116         inb(opl4->fm_port);
 117         inb(opl4->fm_port);
 118         outb(OPL3_OPL3_ENABLE | OPL3_OPL4_ENABLE, opl4->fm_port + 3);
 119         inb(opl4->fm_port);
 120         inb(opl4->fm_port);
 121 }
 122
 123 static int snd_opl4_detect(struct snd_opl4 *opl4)
 124 {
 125         u8 id1, id2;
 126
 127         snd_opl4_enable_opl4(opl4);
 128
 129         id1 = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
 130         snd_printdd("OPL4[02]=%02x\n", id1);
 131         switch (id1 & OPL4_DEVICE_ID_MASK) {
 132         case 0x20:
 133                 opl4->hardware = OPL3_HW_OPL4;
 134                 break;
 135         case 0x40:
 136                 opl4->hardware = OPL3_HW_OPL4_ML;
 137                 break;
 138         default:
 139                 return -ENODEV;
 140         }
 141
 142         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x00);
 143         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0xff);
 144         id1 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_FM);
 145         id2 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_PCM);
 146         snd_printdd("OPL4 id1=%02x id2=%02x\n", id1, id2);
 147         if (id1 != 0x00 || id2 != 0xff)
 148                 return -ENODEV;
 149
 150         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x3f);
 151         snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0x3f);
 152         snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, 0x00);
 153         return 0;
 154 }
 155
 156 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
 157 static void snd_opl4_seq_dev_free(struct snd_seq_device *seq_dev)
 158 {
 159         struct snd_opl4 *opl4 = seq_dev->private_data;
 160         opl4->seq_dev = NULL;
 161 }
 162
 163 static int snd_opl4_create_seq_dev(struct snd_opl4 *opl4, int seq_device)
 164 {
 165         opl4->seq_dev_num = seq_device;
 166         if (snd_seq_device_new(opl4->card, seq_device, SNDRV_SEQ_DEV_ID_OPL4,
 167                                sizeof(struct snd_opl4 *), &opl4->seq_dev) >= 0) {
 168                 strcpy(opl4->seq_dev->name, "OPL4 Wavetable");
 169                 *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(opl4->seq_dev) = opl4;
 170                 opl4->seq_dev->private_data = opl4;
 171                 opl4->seq_dev->private_free = snd_opl4_seq_dev_free;
 172         }
 173         return 0;
 174 }
 175 #endif
 176
 177 static void snd_opl4_free(struct snd_opl4 *opl4)
 178 {
 179 #ifdef CONFIG_PROC_FS
 180         snd_opl4_free_proc(opl4);
 181 #endif
 182         release_and_free_resource(opl4->res_fm_port);
 183         release_and_free_resource(opl4->res_pcm_port);
 184         kfree(opl4);
 185 }
 186
 187 static int snd_opl4_dev_free(struct snd_device *device)
 188 {
 189         struct snd_opl4 *opl4 = device->device_data;
 190         snd_opl4_free(opl4);
 191         return 0;
 192 }
 193
 194 int snd_opl4_create(struct snd_card *card,
 195                     unsigned long fm_port, unsigned long pcm_port,
 196                     int seq_device,
 197                     struct snd_opl3 **ropl3, struct snd_opl4 **ropl4)
 198 {
 199         struct snd_opl4 *opl4;
 200         struct snd_opl3 *opl3;
 201         int err;
 202         static struct snd_device_ops ops = {
 203                 .dev_free = snd_opl4_dev_free
 204         };
 205
 206         if (ropl3)
 207                 *ropl3 = NULL;
 208         if (ropl4)
 209                 *ropl4 = NULL;
 210
 211         opl4 = kzalloc(sizeof(*opl4), GFP_KERNEL);
 212         if (!opl4)
 213                 return -ENOMEM;
 214
 215         opl4->res_fm_port = request_region(fm_port, 8, "OPL4 FM");
 216         opl4->res_pcm_port = request_region(pcm_port, 8, "OPL4 PCM/MIX");
 217         if (!opl4->res_fm_port || !opl4->res_pcm_port) {
 218                 snd_printk(KERN_ERR "opl4: can't grab ports 0x%lx, 0x%lx\n", fm_port, pcm_port);
 219                 snd_opl4_free(opl4);
 220                 return -EBUSY;
 221         }
 222
 223         opl4->card = card;
 224         opl4->fm_port = fm_port;
 225         opl4->pcm_port = pcm_port;
 226         spin_lock_init(&opl4->reg_lock);
 227         mutex_init(&opl4->access_mutex);
 228
 229         err = snd_opl4_detect(opl4);
 230         if (err < 0) {
 231                 snd_opl4_free(opl4);
 232                 snd_printd("OPL4 chip not detected at %#lx/%#lx\n", fm_port, pcm_port);
 233                 return err;
 234         }
 235
 236         err = snd_device_new(card, SNDRV_DEV_CODEC, opl4, &ops);
 237         if (err < 0) {
 238                 snd_opl4_free(opl4);
 239                 return err;
 240         }
 241
 242         err = snd_opl3_create(card, fm_port, fm_port + 2, opl4->hardware, 1, &opl3);
 243         if (err < 0) {
 244                 snd_device_free(card, opl4);
 245                 return err;
 246         }
 247
 248         /* opl3 initialization disabled opl4, so reenable */
 249         snd_opl4_enable_opl4(opl4);
 250
 251         snd_opl4_create_mixer(opl4);
 252 #ifdef CONFIG_PROC_FS
 253         snd_opl4_create_proc(opl4);
 254 #endif
 255
 256 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
 257         opl4->seq_client = -1;
 258         if (opl4->hardware < OPL3_HW_OPL4_ML)
 259                 snd_opl4_create_seq_dev(opl4, seq_device);
 260 #endif
 261
 262         if (ropl3)
 263                 *ropl3 = opl3;
 264         if (ropl4)
 265                 *ropl4 = opl4;
 266         return 0;
 267 }
 268
 269 EXPORT_SYMBOL(snd_opl4_create);
 270
 271 static int __init alsa_opl4_init(void)
 272 {
 273         return 0;
 274 }
 275
 276 static void __exit alsa_opl4_exit(void)
 277 {
 278 }
 279
 280 module_init(alsa_opl4_init)
 281 module_exit(alsa_opl4_exit)