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