kernel/sound/isa/sb/sb_common.c

   1 /*
   2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   3  *                   Uros Bizjak <uros@kss-loka.si>
   4  *
   5  *  Lowlevel routines for control of Sound Blaster cards
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <linux/delay.h>
  24 #include <linux/init.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/slab.h>
  27 #include <linux/ioport.h>
  28 #include <linux/module.h>
  29 #include <linux/io.h>
  30 #include <sound/core.h>
  31 #include <sound/sb.h>
  32 #include <sound/initval.h>
  33
  34 #include <asm/dma.h>
  35
  36 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  37 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
  38 MODULE_LICENSE("GPL");
  39
  40 #define BUSY_LOOPS 100000
  41
  42 #undef IO_DEBUG
  43
  44 int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
  45 {
  46         int i;
  47 #ifdef IO_DEBUG
  48         snd_printk(KERN_DEBUG "command 0x%x\n", val);
  49 #endif
  50         for (i = BUSY_LOOPS; i; i--)
  51                 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
  52                         outb(val, SBP(chip, COMMAND));
  53                         return 1;
  54                 }
  55         snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val);
  56         return 0;
  57 }
  58
  59 int snd_sbdsp_get_byte(struct snd_sb *chip)
  60 {
  61         int val;
  62         int i;
  63         for (i = BUSY_LOOPS; i; i--) {
  64                 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
  65                         val = inb(SBP(chip, READ));
  66 #ifdef IO_DEBUG
  67                         snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
  68 #endif
  69                         return val;
  70                 }
  71         }
  72         snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port);
  73         return -ENODEV;
  74 }
  75
  76 int snd_sbdsp_reset(struct snd_sb *chip)
  77 {
  78         int i;
  79
  80         outb(1, SBP(chip, RESET));
  81         udelay(10);
  82         outb(0, SBP(chip, RESET));
  83         udelay(30);
  84         for (i = BUSY_LOOPS; i; i--)
  85                 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
  86                         if (inb(SBP(chip, READ)) == 0xaa)
  87                                 return 0;
  88                         else
  89                                 break;
  90                 }
  91         snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port);
  92         return -ENODEV;
  93 }
  94
  95 static int snd_sbdsp_version(struct snd_sb * chip)
  96 {
  97         unsigned int result = -ENODEV;
  98
  99         snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
 100         result = (short) snd_sbdsp_get_byte(chip) << 8;
 101         result |= (short) snd_sbdsp_get_byte(chip);
 102         return result;
 103 }
 104
 105 static int snd_sbdsp_probe(struct snd_sb * chip)
 106 {
 107         int version;
 108         int major, minor;
 109         char *str;
 110         unsigned long flags;
 111
 112         /*
 113          *  initialization sequence
 114          */
 115
 116         spin_lock_irqsave(&chip->reg_lock, flags);
 117         if (snd_sbdsp_reset(chip) < 0) {
 118                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 119                 return -ENODEV;
 120         }
 121         version = snd_sbdsp_version(chip);
 122         if (version < 0) {
 123                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 124                 return -ENODEV;
 125         }
 126         spin_unlock_irqrestore(&chip->reg_lock, flags);
 127         major = version >> 8;
 128         minor = version & 0xff;
 129         snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
 130                     chip->port, major, minor);
 131
 132         switch (chip->hardware) {
 133         case SB_HW_AUTO:
 134                 switch (major) {
 135                 case 1:
 136                         chip->hardware = SB_HW_10;
 137                         str = "1.0";
 138                         break;
 139                 case 2:
 140                         if (minor) {
 141                                 chip->hardware = SB_HW_201;
 142                                 str = "2.01+";
 143                         } else {
 144                                 chip->hardware = SB_HW_20;
 145                                 str = "2.0";
 146                         }
 147                         break;
 148                 case 3:
 149                         chip->hardware = SB_HW_PRO;
 150                         str = "Pro";
 151                         break;
 152                 case 4:
 153                         chip->hardware = SB_HW_16;
 154                         str = "16";
 155                         break;
 156                 default:
 157                         snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
 158                                    chip->port, major, minor);
 159                         return -ENODEV;
 160                 }
 161                 break;
 162         case SB_HW_ALS100:
 163                 str = "16 (ALS-100)";
 164                 break;
 165         case SB_HW_ALS4000:
 166                 str = "16 (ALS-4000)";
 167                 break;
 168         case SB_HW_DT019X:
 169                 str = "(DT019X/ALS007)";
 170                 break;
 171         case SB_HW_CS5530:
 172                 str = "16 (CS5530)";
 173                 break;
 174         case SB_HW_JAZZ16:
 175                 str = "Pro (Jazz16)";
 176                 break;
 177         default:
 178                 return -ENODEV;
 179         }
 180         sprintf(chip->name, "Sound Blaster %s", str);
 181         chip->version = (major << 8) | minor;
 182         return 0;
 183 }
 184
 185 static int snd_sbdsp_free(struct snd_sb *chip)
 186 {
 187         release_and_free_resource(chip->res_port);
 188         if (chip->irq >= 0)
 189                 free_irq(chip->irq, (void *) chip);
 190 #ifdef CONFIG_ISA
 191         if (chip->dma8 >= 0) {
 192                 disable_dma(chip->dma8);
 193                 free_dma(chip->dma8);
 194         }
 195         if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
 196                 disable_dma(chip->dma16);
 197                 free_dma(chip->dma16);
 198         }
 199 #endif
 200         kfree(chip);
 201         return 0;
 202 }
 203
 204 static int snd_sbdsp_dev_free(struct snd_device *device)
 205 {
 206         struct snd_sb *chip = device->device_data;
 207         return snd_sbdsp_free(chip);
 208 }
 209
 210 int snd_sbdsp_create(struct snd_card *card,
 211                      unsigned long port,
 212                      int irq,
 213                      irq_handler_t irq_handler,
 214                      int dma8,
 215                      int dma16,
 216                      unsigned short hardware,
 217                      struct snd_sb **r_chip)
 218 {
 219         struct snd_sb *chip;
 220         int err;
 221         static struct snd_device_ops ops = {
 222                 .dev_free =     snd_sbdsp_dev_free,
 223         };
 224
 225         if (snd_BUG_ON(!r_chip))
 226                 return -EINVAL;
 227         *r_chip = NULL;
 228         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 229         if (chip == NULL)
 230                 return -ENOMEM;
 231         spin_lock_init(&chip->reg_lock);
 232         spin_lock_init(&chip->open_lock);
 233         spin_lock_init(&chip->midi_input_lock);
 234         spin_lock_init(&chip->mixer_lock);
 235         chip->irq = -1;
 236         chip->dma8 = -1;
 237         chip->dma16 = -1;
 238         chip->port = port;
 239
 240         if (request_irq(irq, irq_handler,
 241                         (hardware == SB_HW_ALS4000 ||
 242                          hardware == SB_HW_CS5530) ?
 243                         IRQF_SHARED : 0,
 244                         "SoundBlaster", (void *) chip)) {
 245                 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
 246                 snd_sbdsp_free(chip);
 247                 return -EBUSY;
 248         }
 249         chip->irq = irq;
 250
 251         if (hardware == SB_HW_ALS4000)
 252                 goto __skip_allocation;
 253
 254         if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
 255                 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
 256                 snd_sbdsp_free(chip);
 257                 return -EBUSY;
 258         }
 259
 260 #ifdef CONFIG_ISA
 261         if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
 262                 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
 263                 snd_sbdsp_free(chip);
 264                 return -EBUSY;
 265         }
 266         chip->dma8 = dma8;
 267         if (dma16 >= 0) {
 268                 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
 269                         /* no duplex */
 270                         dma16 = -1;
 271                 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
 272                         snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
 273                         snd_sbdsp_free(chip);
 274                         return -EBUSY;
 275                 }
 276         }
 277         chip->dma16 = dma16;
 278 #endif
 279
 280       __skip_allocation:
 281         chip->card = card;
 282         chip->hardware = hardware;
 283         if ((err = snd_sbdsp_probe(chip)) < 0) {
 284                 snd_sbdsp_free(chip);
 285                 return err;
 286         }
 287         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 288                 snd_sbdsp_free(chip);
 289                 return err;
 290         }
 291         *r_chip = chip;
 292         return 0;
 293 }
 294
 295 EXPORT_SYMBOL(snd_sbdsp_command);
 296 EXPORT_SYMBOL(snd_sbdsp_get_byte);
 297 EXPORT_SYMBOL(snd_sbdsp_reset);
 298 EXPORT_SYMBOL(snd_sbdsp_create);
 299 /* sb_mixer.c */
 300 EXPORT_SYMBOL(snd_sbmixer_write);
 301 EXPORT_SYMBOL(snd_sbmixer_read);
 302 EXPORT_SYMBOL(snd_sbmixer_new);
 303 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
 304 #ifdef CONFIG_PM
 305 EXPORT_SYMBOL(snd_sbmixer_suspend);
 306 EXPORT_SYMBOL(snd_sbmixer_resume);
 307 #endif
 308
 309 /*
 310  *  INIT part
 311  */
 312
 313 static int __init alsa_sb_common_init(void)
 314 {
 315         return 0;
 316 }
 317
 318 static void __exit alsa_sb_common_exit(void)
 319 {
 320 }
 321
 322 module_init(alsa_sb_common_init)
 323 module_exit(alsa_sb_common_exit)