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