git.oblomov.eu Git - linux-2.6/blob - sound/pci/es1938.c

   1 /*
   2  *  Driver for ESS Solo-1 (ES1938, ES1946, ES1969) soundcard
   3  *  Copyright (c) by Jaromir Koutek <miri@punknet.cz>,
   4  *                   Jaroslav Kysela <perex@suse.cz>,
   5  *                   Thomas Sailer <sailer@ife.ee.ethz.ch>,
   6  *                   Abramo Bagnara <abramo@alsa-project.org>,
   7  *                   Markus Gruber <gruber@eikon.tum.de>
   8  *
   9  * Rewritten from sonicvibes.c source.
  10  *
  11  *  TODO:
  12  *    Rewrite better spinlocks
  13  *
  14  *
  15  *   This program is free software; you can redistribute it and/or modify
  16  *   it under the terms of the GNU General Public License as published by
  17  *   the Free Software Foundation; either version 2 of the License, or
  18  *   (at your option) any later version.
  19  *
  20  *   This program is distributed in the hope that it will be useful,
  21  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *   GNU General Public License for more details.
  24  *
  25  *   You should have received a copy of the GNU General Public License
  26  *   along with this program; if not, write to the Free Software
  27  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  28  *
  29  */
  30
  31 /*
  32   NOTES:
  33   - Capture data is written unaligned starting from dma_base + 1 so I need to
  34     disable mmap and to add a copy callback.
  35   - After several cycle of the following:
  36     while : ; do arecord -d1 -f cd -t raw | aplay -f cd ; done
  37     a "playback write error (DMA or IRQ trouble?)" may happen.
  38     This is due to playback interrupts not generated.
  39     I suspect a timing issue.
  40   - Sometimes the interrupt handler is invoked wrongly during playback.
  41     This generates some harmless "Unexpected hw_pointer: wrong interrupt
  42     acknowledge".
  43     I've seen that using small period sizes.
  44     Reproducible with:
  45     mpg123 test.mp3 &
  46     hdparm -t -T /dev/hda
  47 */
  48
  49
  50 #include <sound/driver.h>
  51 #include <linux/init.h>
  52 #include <linux/interrupt.h>
  53 #include <linux/pci.h>
  54 #include <linux/slab.h>
  55 #include <linux/gameport.h>
  56 #include <linux/moduleparam.h>
  57 #include <linux/delay.h>
  58 #include <sound/core.h>
  59 #include <sound/control.h>
  60 #include <sound/pcm.h>
  61 #include <sound/opl3.h>
  62 #include <sound/mpu401.h>
  63 #include <sound/initval.h>
  64
  65 #include <asm/io.h>
  66
  67 MODULE_AUTHOR("Jaromir Koutek <miri@punknet.cz>");
  68 MODULE_DESCRIPTION("ESS Solo-1");
  69 MODULE_LICENSE("GPL");
  70 MODULE_SUPPORTED_DEVICE("{{ESS,ES1938},"
  71                 "{ESS,ES1946},"
  72                 "{ESS,ES1969},"
  73                 "{TerraTec,128i PCI}}");
  74
  75 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  76 #define SUPPORT_JOYSTICK 1
  77 #endif
  78
  79 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  80 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  81 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  82
  83 module_param_array(index, int, NULL, 0444);
  84 MODULE_PARM_DESC(index, "Index value for ESS Solo-1 soundcard.");
  85 module_param_array(id, charp, NULL, 0444);
  86 MODULE_PARM_DESC(id, "ID string for ESS Solo-1 soundcard.");
  87 module_param_array(enable, bool, NULL, 0444);
  88 MODULE_PARM_DESC(enable, "Enable ESS Solo-1 soundcard.");
  89
  90 #define SLIO_REG(chip, x) ((chip)->io_port + ESSIO_REG_##x)
  91
  92 #define SLDM_REG(chip, x) ((chip)->ddma_port + ESSDM_REG_##x)
  93
  94 #define SLSB_REG(chip, x) ((chip)->sb_port + ESSSB_REG_##x)
  95
  96 #define SL_PCI_LEGACYCONTROL            0x40
  97 #define SL_PCI_CONFIG                   0x50
  98 #define SL_PCI_DDMACONTROL              0x60
  99
 100 #define ESSIO_REG_AUDIO2DMAADDR         0
 101 #define ESSIO_REG_AUDIO2DMACOUNT        4
 102 #define ESSIO_REG_AUDIO2MODE            6
 103 #define ESSIO_REG_IRQCONTROL            7
 104
 105 #define ESSDM_REG_DMAADDR               0x00
 106 #define ESSDM_REG_DMACOUNT              0x04
 107 #define ESSDM_REG_DMACOMMAND            0x08
 108 #define ESSDM_REG_DMASTATUS             0x08
 109 #define ESSDM_REG_DMAMODE               0x0b
 110 #define ESSDM_REG_DMACLEAR              0x0d
 111 #define ESSDM_REG_DMAMASK               0x0f
 112
 113 #define ESSSB_REG_FMLOWADDR             0x00
 114 #define ESSSB_REG_FMHIGHADDR            0x02
 115 #define ESSSB_REG_MIXERADDR             0x04
 116 #define ESSSB_REG_MIXERDATA             0x05
 117
 118 #define ESSSB_IREG_AUDIO1               0x14
 119 #define ESSSB_IREG_MICMIX               0x1a
 120 #define ESSSB_IREG_RECSRC               0x1c
 121 #define ESSSB_IREG_MASTER               0x32
 122 #define ESSSB_IREG_FM                   0x36
 123 #define ESSSB_IREG_AUXACD               0x38
 124 #define ESSSB_IREG_AUXB                 0x3a
 125 #define ESSSB_IREG_PCSPEAKER            0x3c
 126 #define ESSSB_IREG_LINE                 0x3e
 127 #define ESSSB_IREG_SPATCONTROL          0x50
 128 #define ESSSB_IREG_SPATLEVEL            0x52
 129 #define ESSSB_IREG_MASTER_LEFT          0x60
 130 #define ESSSB_IREG_MASTER_RIGHT         0x62
 131 #define ESSSB_IREG_MPU401CONTROL        0x64
 132 #define ESSSB_IREG_MICMIXRECORD         0x68
 133 #define ESSSB_IREG_AUDIO2RECORD         0x69
 134 #define ESSSB_IREG_AUXACDRECORD         0x6a
 135 #define ESSSB_IREG_FMRECORD             0x6b
 136 #define ESSSB_IREG_AUXBRECORD           0x6c
 137 #define ESSSB_IREG_MONO                 0x6d
 138 #define ESSSB_IREG_LINERECORD           0x6e
 139 #define ESSSB_IREG_MONORECORD           0x6f
 140 #define ESSSB_IREG_AUDIO2SAMPLE         0x70
 141 #define ESSSB_IREG_AUDIO2MODE           0x71
 142 #define ESSSB_IREG_AUDIO2FILTER         0x72
 143 #define ESSSB_IREG_AUDIO2TCOUNTL        0x74
 144 #define ESSSB_IREG_AUDIO2TCOUNTH        0x76
 145 #define ESSSB_IREG_AUDIO2CONTROL1       0x78
 146 #define ESSSB_IREG_AUDIO2CONTROL2       0x7a
 147 #define ESSSB_IREG_AUDIO2               0x7c
 148
 149 #define ESSSB_REG_RESET                 0x06
 150
 151 #define ESSSB_REG_READDATA              0x0a
 152 #define ESSSB_REG_WRITEDATA             0x0c
 153 #define ESSSB_REG_READSTATUS            0x0c
 154
 155 #define ESSSB_REG_STATUS                0x0e
 156
 157 #define ESS_CMD_EXTSAMPLERATE           0xa1
 158 #define ESS_CMD_FILTERDIV               0xa2
 159 #define ESS_CMD_DMACNTRELOADL           0xa4
 160 #define ESS_CMD_DMACNTRELOADH           0xa5
 161 #define ESS_CMD_ANALOGCONTROL           0xa8
 162 #define ESS_CMD_IRQCONTROL              0xb1
 163 #define ESS_CMD_DRQCONTROL              0xb2
 164 #define ESS_CMD_RECLEVEL                0xb4
 165 #define ESS_CMD_SETFORMAT               0xb6
 166 #define ESS_CMD_SETFORMAT2              0xb7
 167 #define ESS_CMD_DMACONTROL              0xb8
 168 #define ESS_CMD_DMATYPE                 0xb9
 169 #define ESS_CMD_OFFSETLEFT              0xba
 170 #define ESS_CMD_OFFSETRIGHT             0xbb
 171 #define ESS_CMD_READREG                 0xc0
 172 #define ESS_CMD_ENABLEEXT               0xc6
 173 #define ESS_CMD_PAUSEDMA                0xd0
 174 #define ESS_CMD_ENABLEAUDIO1            0xd1
 175 #define ESS_CMD_STOPAUDIO1              0xd3
 176 #define ESS_CMD_AUDIO1STATUS            0xd8
 177 #define ESS_CMD_CONTDMA                 0xd4
 178 #define ESS_CMD_TESTIRQ                 0xf2
 179
 180 #define ESS_RECSRC_MIC          0
 181 #define ESS_RECSRC_AUXACD       2
 182 #define ESS_RECSRC_AUXB         5
 183 #define ESS_RECSRC_LINE         6
 184 #define ESS_RECSRC_NONE         7
 185
 186 #define DAC1 0x01
 187 #define ADC1 0x02
 188 #define DAC2 0x04
 189
 190 /*
 191
 192  */
 193
 194 typedef struct _snd_es1938 es1938_t;
 195
 196 #define SAVED_REG_SIZE  32 /* max. number of registers to save */
 197
 198 struct _snd_es1938 {
 199         int irq;
 200
 201         unsigned long io_port;
 202         unsigned long sb_port;
 203         unsigned long vc_port;
 204         unsigned long mpu_port;
 205         unsigned long game_port;
 206         unsigned long ddma_port;
 207
 208         unsigned char irqmask;
 209         unsigned char revision;
 210
 211         snd_kcontrol_t *hw_volume;
 212         snd_kcontrol_t *hw_switch;
 213         snd_kcontrol_t *master_volume;
 214         snd_kcontrol_t *master_switch;
 215
 216         struct pci_dev *pci;
 217         snd_card_t *card;
 218         snd_pcm_t *pcm;
 219         snd_pcm_substream_t *capture_substream;
 220         snd_pcm_substream_t *playback1_substream;
 221         snd_pcm_substream_t *playback2_substream;
 222         snd_kmixer_t *mixer;
 223         snd_rawmidi_t *rmidi;
 224
 225         unsigned int dma1_size;
 226         unsigned int dma2_size;
 227         unsigned int dma1_start;
 228         unsigned int dma2_start;
 229         unsigned int dma1_shift;
 230         unsigned int dma2_shift;
 231         unsigned int active;
 232
 233         spinlock_t reg_lock;
 234         spinlock_t mixer_lock;
 235         snd_info_entry_t *proc_entry;
 236
 237 #ifdef SUPPORT_JOYSTICK
 238         struct gameport *gameport;
 239 #endif
 240 #ifdef CONFIG_PM
 241         unsigned char saved_regs[SAVED_REG_SIZE];
 242 #endif
 243 };
 244
 245 static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 246
 247 static struct pci_device_id snd_es1938_ids[] = {
 248         { 0x125d, 0x1969, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* Solo-1 */
 249         { 0, }
 250 };
 251
 252 MODULE_DEVICE_TABLE(pci, snd_es1938_ids);
 253
 254 #define RESET_LOOP_TIMEOUT      0x10000
 255 #define WRITE_LOOP_TIMEOUT      0x10000
 256 #define GET_LOOP_TIMEOUT        0x01000
 257
 258 #undef REG_DEBUG
 259 /* -----------------------------------------------------------------
 260  * Write to a mixer register
 261  * -----------------------------------------------------------------*/
 262 static void snd_es1938_mixer_write(es1938_t *chip, unsigned char reg, unsigned char val)
 263 {
 264         unsigned long flags;
 265         spin_lock_irqsave(&chip->mixer_lock, flags);
 266         outb(reg, SLSB_REG(chip, MIXERADDR));
 267         outb(val, SLSB_REG(chip, MIXERDATA));
 268         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 269 #ifdef REG_DEBUG
 270         snd_printk("Mixer reg %02x set to %02x\n", reg, val);
 271 #endif
 272 }
 273
 274 /* -----------------------------------------------------------------
 275  * Read from a mixer register
 276  * -----------------------------------------------------------------*/
 277 static int snd_es1938_mixer_read(es1938_t *chip, unsigned char reg)
 278 {
 279         int data;
 280         unsigned long flags;
 281         spin_lock_irqsave(&chip->mixer_lock, flags);
 282         outb(reg, SLSB_REG(chip, MIXERADDR));
 283         data = inb(SLSB_REG(chip, MIXERDATA));
 284         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 285 #ifdef REG_DEBUG
 286         snd_printk("Mixer reg %02x now is %02x\n", reg, data);
 287 #endif
 288         return data;
 289 }
 290
 291 /* -----------------------------------------------------------------
 292  * Write to some bits of a mixer register (return old value)
 293  * -----------------------------------------------------------------*/
 294 static int snd_es1938_mixer_bits(es1938_t *chip, unsigned char reg, unsigned char mask, unsigned char val)
 295 {
 296         unsigned long flags;
 297         unsigned char old, new, oval;
 298         spin_lock_irqsave(&chip->mixer_lock, flags);
 299         outb(reg, SLSB_REG(chip, MIXERADDR));
 300         old = inb(SLSB_REG(chip, MIXERDATA));
 301         oval = old & mask;
 302         if (val != oval) {
 303                 new = (old & ~mask) | (val & mask);
 304                 outb(new, SLSB_REG(chip, MIXERDATA));
 305 #ifdef REG_DEBUG
 306                 snd_printk("Mixer reg %02x was %02x, set to %02x\n", reg, old, new);
 307 #endif
 308         }
 309         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 310         return oval;
 311 }
 312
 313 /* -----------------------------------------------------------------
 314  * Write command to Controller Registers
 315  * -----------------------------------------------------------------*/
 316 static void snd_es1938_write_cmd(es1938_t *chip, unsigned char cmd)
 317 {
 318         int i;
 319         unsigned char v;
 320         for (i = 0; i < WRITE_LOOP_TIMEOUT; i++) {
 321                 if (!(v = inb(SLSB_REG(chip, READSTATUS)) & 0x80)) {
 322                         outb(cmd, SLSB_REG(chip, WRITEDATA));
 323                         return;
 324                 }
 325         }
 326         printk("snd_es1938_write_cmd timeout (0x02%x/0x02%x)\n", cmd, v);
 327 }
 328
 329 /* -----------------------------------------------------------------
 330  * Read the Read Data Buffer
 331  * -----------------------------------------------------------------*/
 332 static int snd_es1938_get_byte(es1938_t *chip)
 333 {
 334         int i;
 335         unsigned char v;
 336         for (i = GET_LOOP_TIMEOUT; i; i--)
 337                 if ((v = inb(SLSB_REG(chip, STATUS))) & 0x80)
 338                         return inb(SLSB_REG(chip, READDATA));
 339         snd_printk("get_byte timeout: status 0x02%x\n", v);
 340         return -ENODEV;
 341 }
 342
 343 /* -----------------------------------------------------------------
 344  * Write value cmd register
 345  * -----------------------------------------------------------------*/
 346 static void snd_es1938_write(es1938_t *chip, unsigned char reg, unsigned char val)
 347 {
 348         unsigned long flags;
 349         spin_lock_irqsave(&chip->reg_lock, flags);
 350         snd_es1938_write_cmd(chip, reg);
 351         snd_es1938_write_cmd(chip, val);
 352         spin_unlock_irqrestore(&chip->reg_lock, flags);
 353 #ifdef REG_DEBUG
 354         snd_printk("Reg %02x set to %02x\n", reg, val);
 355 #endif
 356 }
 357
 358 /* -----------------------------------------------------------------
 359  * Read data from cmd register and return it
 360  * -----------------------------------------------------------------*/
 361 static unsigned char snd_es1938_read(es1938_t *chip, unsigned char reg)
 362 {
 363         unsigned char val;
 364         unsigned long flags;
 365         spin_lock_irqsave(&chip->reg_lock, flags);
 366         snd_es1938_write_cmd(chip, ESS_CMD_READREG);
 367         snd_es1938_write_cmd(chip, reg);
 368         val = snd_es1938_get_byte(chip);
 369         spin_unlock_irqrestore(&chip->reg_lock, flags);
 370 #ifdef REG_DEBUG
 371         snd_printk("Reg %02x now is %02x\n", reg, val);
 372 #endif
 373         return val;
 374 }
 375
 376 /* -----------------------------------------------------------------
 377  * Write data to cmd register and return old value
 378  * -----------------------------------------------------------------*/
 379 static int snd_es1938_bits(es1938_t *chip, unsigned char reg, unsigned char mask, unsigned char val)
 380 {
 381         unsigned long flags;
 382         unsigned char old, new, oval;
 383         spin_lock_irqsave(&chip->reg_lock, flags);
 384         snd_es1938_write_cmd(chip, ESS_CMD_READREG);
 385         snd_es1938_write_cmd(chip, reg);
 386         old = snd_es1938_get_byte(chip);
 387         oval = old & mask;
 388         if (val != oval) {
 389                 snd_es1938_write_cmd(chip, reg);
 390                 new = (old & ~mask) | (val & mask);
 391                 snd_es1938_write_cmd(chip, new);
 392 #ifdef REG_DEBUG
 393                 snd_printk("Reg %02x was %02x, set to %02x\n", reg, old, new);
 394 #endif
 395         }
 396         spin_unlock_irqrestore(&chip->reg_lock, flags);
 397         return oval;
 398 }
 399
 400 /* --------------------------------------------------------------------
 401  * Reset the chip
 402  * --------------------------------------------------------------------*/
 403 static void snd_es1938_reset(es1938_t *chip)
 404 {
 405         int i;
 406
 407         outb(3, SLSB_REG(chip, RESET));
 408         inb(SLSB_REG(chip, RESET));
 409         outb(0, SLSB_REG(chip, RESET));
 410         for (i = 0; i < RESET_LOOP_TIMEOUT; i++) {
 411                 if (inb(SLSB_REG(chip, STATUS)) & 0x80) {
 412                         if (inb(SLSB_REG(chip, READDATA)) == 0xaa)
 413                                 goto __next;
 414                 }
 415         }
 416         snd_printk("ESS Solo-1 reset failed\n");
 417
 418      __next:
 419         snd_es1938_write_cmd(chip, ESS_CMD_ENABLEEXT);
 420
 421         /* Demand transfer DMA: 4 bytes per DMA request */
 422         snd_es1938_write(chip, ESS_CMD_DMATYPE, 2);
 423
 424         /* Change behaviour of register A1
 425            4x oversampling
 426            2nd channel DAC asynchronous */
 427         snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2MODE, 0x32);
 428         /* enable/select DMA channel and IRQ channel */
 429         snd_es1938_bits(chip, ESS_CMD_IRQCONTROL, 0xf0, 0x50);
 430         snd_es1938_bits(chip, ESS_CMD_DRQCONTROL, 0xf0, 0x50);
 431         snd_es1938_write_cmd(chip, ESS_CMD_ENABLEAUDIO1);
 432         /* Set spatializer parameters to recommended values */
 433         snd_es1938_mixer_write(chip, 0x54, 0x8f);
 434         snd_es1938_mixer_write(chip, 0x56, 0x95);
 435         snd_es1938_mixer_write(chip, 0x58, 0x94);
 436         snd_es1938_mixer_write(chip, 0x5a, 0x80);
 437 }
 438
 439 /* --------------------------------------------------------------------
 440  * Reset the FIFOs
 441  * --------------------------------------------------------------------*/
 442 static void snd_es1938_reset_fifo(es1938_t *chip)
 443 {
 444         outb(2, SLSB_REG(chip, RESET));
 445         outb(0, SLSB_REG(chip, RESET));
 446 }
 447
 448 static ratnum_t clocks[2] = {
 449         {
 450                 .num = 793800,
 451                 .den_min = 1,
 452                 .den_max = 128,
 453                 .den_step = 1,
 454         },
 455         {
 456                 .num = 768000,
 457                 .den_min = 1,
 458                 .den_max = 128,
 459                 .den_step = 1,
 460         }
 461 };
 462
 463 static snd_pcm_hw_constraint_ratnums_t hw_constraints_clocks = {
 464         .nrats = 2,
 465         .rats = clocks,
 466 };
 467
 468
 469 static void snd_es1938_rate_set(es1938_t *chip,
 470                                 snd_pcm_substream_t *substream,
 471                                 int mode)
 472 {
 473         unsigned int bits, div0;
 474         snd_pcm_runtime_t *runtime = substream->runtime;
 475         if (runtime->rate_num == clocks[0].num)
 476                 bits = 128 - runtime->rate_den;
 477         else
 478                 bits = 256 - runtime->rate_den;
 479
 480         /* set filter register */
 481         div0 = 256 - 7160000*20/(8*82*runtime->rate);
 482
 483         if (mode == DAC2) {
 484                 snd_es1938_mixer_write(chip, 0x70, bits);
 485                 snd_es1938_mixer_write(chip, 0x72, div0);
 486         } else {
 487                 snd_es1938_write(chip, 0xA1, bits);
 488                 snd_es1938_write(chip, 0xA2, div0);
 489         }
 490 }
 491
 492 /* --------------------------------------------------------------------
 493  * Configure Solo1 builtin DMA Controller
 494  * --------------------------------------------------------------------*/
 495
 496 static void snd_es1938_playback1_setdma(es1938_t *chip)
 497 {
 498         outb(0x00, SLIO_REG(chip, AUDIO2MODE));
 499         outl(chip->dma2_start, SLIO_REG(chip, AUDIO2DMAADDR));
 500         outw(0, SLIO_REG(chip, AUDIO2DMACOUNT));
 501         outw(chip->dma2_size, SLIO_REG(chip, AUDIO2DMACOUNT));
 502 }
 503
 504 static void snd_es1938_playback2_setdma(es1938_t *chip)
 505 {
 506         /* Enable DMA controller */
 507         outb(0xc4, SLDM_REG(chip, DMACOMMAND));
 508         /* 1. Master reset */
 509         outb(0, SLDM_REG(chip, DMACLEAR));
 510         /* 2. Mask DMA */
 511         outb(1, SLDM_REG(chip, DMAMASK));
 512         outb(0x18, SLDM_REG(chip, DMAMODE));
 513         outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
 514         outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
 515         /* 3. Unmask DMA */
 516         outb(0, SLDM_REG(chip, DMAMASK));
 517 }
 518
 519 static void snd_es1938_capture_setdma(es1938_t *chip)
 520 {
 521         /* Enable DMA controller */
 522         outb(0xc4, SLDM_REG(chip, DMACOMMAND));
 523         /* 1. Master reset */
 524         outb(0, SLDM_REG(chip, DMACLEAR));
 525         /* 2. Mask DMA */
 526         outb(1, SLDM_REG(chip, DMAMASK));
 527         outb(0x14, SLDM_REG(chip, DMAMODE));
 528         outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
 529         outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
 530         /* 3. Unmask DMA */
 531         outb(0, SLDM_REG(chip, DMAMASK));
 532 }
 533
 534 /* ----------------------------------------------------------------------
 535  *
 536  *                           *** PCM part ***
 537  */
 538
 539 static int snd_es1938_capture_trigger(snd_pcm_substream_t * substream,
 540                                       int cmd)
 541 {
 542         es1938_t *chip = snd_pcm_substream_chip(substream);
 543         int val;
 544         switch (cmd) {
 545         case SNDRV_PCM_TRIGGER_START:
 546                 val = 0x0f;
 547                 chip->active |= ADC1;
 548                 break;
 549         case SNDRV_PCM_TRIGGER_STOP:
 550                 val = 0x00;
 551                 chip->active &= ~ADC1;
 552                 break;
 553         default:
 554                 return -EINVAL;
 555         }
 556         snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
 557         return 0;
 558 }
 559
 560 static int snd_es1938_playback1_trigger(snd_pcm_substream_t * substream,
 561                                         int cmd)
 562 {
 563         es1938_t *chip = snd_pcm_substream_chip(substream);
 564         switch (cmd) {
 565         case SNDRV_PCM_TRIGGER_START:
 566                 /* According to the documentation this should be:
 567                    0x13 but that value may randomly swap stereo channels */
 568                 snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x92);
 569                 udelay(10);
 570                 snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x93);
 571                 /* This two stage init gives the FIFO -> DAC connection time to
 572                  * settle before first data from DMA flows in.  This should ensure
 573                  * no swapping of stereo channels.  Report a bug if otherwise :-) */
 574                 outb(0x0a, SLIO_REG(chip, AUDIO2MODE));
 575                 chip->active |= DAC2;
 576                 break;
 577         case SNDRV_PCM_TRIGGER_STOP:
 578                 outb(0, SLIO_REG(chip, AUDIO2MODE));
 579                 snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0);
 580                 chip->active &= ~DAC2;
 581                 break;
 582         default:
 583                 return -EINVAL;
 584         }
 585         return 0;
 586 }
 587
 588 static int snd_es1938_playback2_trigger(snd_pcm_substream_t * substream,
 589                                         int cmd)
 590 {
 591         es1938_t *chip = snd_pcm_substream_chip(substream);
 592         int val;
 593         switch (cmd) {
 594         case SNDRV_PCM_TRIGGER_START:
 595                 val = 5;
 596                 chip->active |= DAC1;
 597                 break;
 598         case SNDRV_PCM_TRIGGER_STOP:
 599                 val = 0;
 600                 chip->active &= ~DAC1;
 601                 break;
 602         default:
 603                 return -EINVAL;
 604         }
 605         snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
 606         return 0;
 607 }
 608
 609 static int snd_es1938_playback_trigger(snd_pcm_substream_t *substream,
 610                                        int cmd)
 611 {
 612         switch (substream->number) {
 613         case 0:
 614                 return snd_es1938_playback1_trigger(substream, cmd);
 615         case 1:
 616                 return snd_es1938_playback2_trigger(substream, cmd);
 617         }
 618         snd_BUG();
 619         return -EINVAL;
 620 }
 621
 622 /* --------------------------------------------------------------------
 623  * First channel for Extended Mode Audio 1 ADC Operation
 624  * --------------------------------------------------------------------*/
 625 static int snd_es1938_capture_prepare(snd_pcm_substream_t * substream)
 626 {
 627         es1938_t *chip = snd_pcm_substream_chip(substream);
 628         snd_pcm_runtime_t *runtime = substream->runtime;
 629         int u, is8, mono;
 630         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 631         unsigned int count = snd_pcm_lib_period_bytes(substream);
 632
 633         chip->dma1_size = size;
 634         chip->dma1_start = runtime->dma_addr;
 635
 636         mono = (runtime->channels > 1) ? 0 : 1;
 637         is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
 638         u = snd_pcm_format_unsigned(runtime->format);
 639
 640         chip->dma1_shift = 2 - mono - is8;
 641
 642         snd_es1938_reset_fifo(chip);
 643
 644         /* program type */
 645         snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
 646
 647         /* set clock and counters */
 648         snd_es1938_rate_set(chip, substream, ADC1);
 649
 650         count = 0x10000 - count;
 651         snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
 652         snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
 653
 654         /* initialize and configure ADC */
 655         snd_es1938_write(chip, ESS_CMD_SETFORMAT2, u ? 0x51 : 0x71);
 656         snd_es1938_write(chip, ESS_CMD_SETFORMAT2, 0x90 |
 657                        (u ? 0x00 : 0x20) |
 658                        (is8 ? 0x00 : 0x04) |
 659                        (mono ? 0x40 : 0x08));
 660
 661         //      snd_es1938_reset_fifo(chip);
 662
 663         /* 11. configure system interrupt controller and DMA controller */
 664         snd_es1938_capture_setdma(chip);
 665
 666         return 0;
 667 }
 668
 669
 670 /* ------------------------------------------------------------------------------
 671  * Second Audio channel DAC Operation
 672  * ------------------------------------------------------------------------------*/
 673 static int snd_es1938_playback1_prepare(snd_pcm_substream_t * substream)
 674 {
 675         es1938_t *chip = snd_pcm_substream_chip(substream);
 676         snd_pcm_runtime_t *runtime = substream->runtime;
 677         int u, is8, mono;
 678         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 679         unsigned int count = snd_pcm_lib_period_bytes(substream);
 680
 681         chip->dma2_size = size;
 682         chip->dma2_start = runtime->dma_addr;
 683
 684         mono = (runtime->channels > 1) ? 0 : 1;
 685         is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
 686         u = snd_pcm_format_unsigned(runtime->format);
 687
 688         chip->dma2_shift = 2 - mono - is8;
 689
 690         snd_es1938_reset_fifo(chip);
 691
 692         /* set clock and counters */
 693         snd_es1938_rate_set(chip, substream, DAC2);
 694
 695         count >>= 1;
 696         count = 0x10000 - count;
 697         snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTL, count & 0xff);
 698         snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTH, count >> 8);
 699
 700         /* initialize and configure Audio 2 DAC */
 701         snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x40 | (u ? 0 : 4) | (mono ? 0 : 2) | (is8 ? 0 : 1));
 702
 703         /* program DMA */
 704         snd_es1938_playback1_setdma(chip);
 705
 706         return 0;
 707 }
 708
 709 static int snd_es1938_playback2_prepare(snd_pcm_substream_t * substream)
 710 {
 711         es1938_t *chip = snd_pcm_substream_chip(substream);
 712         snd_pcm_runtime_t *runtime = substream->runtime;
 713         int u, is8, mono;
 714         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 715         unsigned int count = snd_pcm_lib_period_bytes(substream);
 716
 717         chip->dma1_size = size;
 718         chip->dma1_start = runtime->dma_addr;
 719
 720         mono = (runtime->channels > 1) ? 0 : 1;
 721         is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
 722         u = snd_pcm_format_unsigned(runtime->format);
 723
 724         chip->dma1_shift = 2 - mono - is8;
 725
 726         count = 0x10000 - count;
 727
 728         /* reset */
 729         snd_es1938_reset_fifo(chip);
 730
 731         snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
 732
 733         /* set clock and counters */
 734         snd_es1938_rate_set(chip, substream, DAC1);
 735         snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
 736         snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
 737
 738         /* initialized and configure DAC */
 739         snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x80 : 0x00);
 740         snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x51 : 0x71);
 741         snd_es1938_write(chip, ESS_CMD_SETFORMAT2,
 742                          0x90 | (mono ? 0x40 : 0x08) |
 743                          (is8 ? 0x00 : 0x04) | (u ? 0x00 : 0x20));
 744
 745         /* program DMA */
 746         snd_es1938_playback2_setdma(chip);
 747
 748         return 0;
 749 }
 750
 751 static int snd_es1938_playback_prepare(snd_pcm_substream_t *substream)
 752 {
 753         switch (substream->number) {
 754         case 0:
 755                 return snd_es1938_playback1_prepare(substream);
 756         case 1:
 757                 return snd_es1938_playback2_prepare(substream);
 758         }
 759         snd_BUG();
 760         return -EINVAL;
 761 }
 762
 763 static snd_pcm_uframes_t snd_es1938_capture_pointer(snd_pcm_substream_t * substream)
 764 {
 765         es1938_t *chip = snd_pcm_substream_chip(substream);
 766         size_t ptr;
 767         size_t old, new;
 768 #if 1
 769         /* This stuff is *needed*, don't ask why - AB */
 770         old = inw(SLDM_REG(chip, DMACOUNT));
 771         while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
 772                 old = new;
 773         ptr = chip->dma1_size - 1 - new;
 774 #else
 775         ptr = inl(SLDM_REG(chip, DMAADDR)) - chip->dma1_start;
 776 #endif
 777         return ptr >> chip->dma1_shift;
 778 }
 779
 780 static snd_pcm_uframes_t snd_es1938_playback1_pointer(snd_pcm_substream_t * substream)
 781 {
 782         es1938_t *chip = snd_pcm_substream_chip(substream);
 783         size_t ptr;
 784 #if 1
 785         ptr = chip->dma2_size - inw(SLIO_REG(chip, AUDIO2DMACOUNT));
 786 #else
 787         ptr = inl(SLIO_REG(chip, AUDIO2DMAADDR)) - chip->dma2_start;
 788 #endif
 789         return ptr >> chip->dma2_shift;
 790 }
 791
 792 static snd_pcm_uframes_t snd_es1938_playback2_pointer(snd_pcm_substream_t * substream)
 793 {
 794         es1938_t *chip = snd_pcm_substream_chip(substream);
 795         size_t ptr;
 796         size_t old, new;
 797 #if 1
 798         /* This stuff is *needed*, don't ask why - AB */
 799         old = inw(SLDM_REG(chip, DMACOUNT));
 800         while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
 801                 old = new;
 802         ptr = chip->dma1_size - 1 - new;
 803 #else
 804         ptr = inl(SLDM_REG(chip, DMAADDR)) - chip->dma1_start;
 805 #endif
 806         return ptr >> chip->dma1_shift;
 807 }
 808
 809 static snd_pcm_uframes_t snd_es1938_playback_pointer(snd_pcm_substream_t *substream)
 810 {
 811         switch (substream->number) {
 812         case 0:
 813                 return snd_es1938_playback1_pointer(substream);
 814         case 1:
 815                 return snd_es1938_playback2_pointer(substream);
 816         }
 817         snd_BUG();
 818         return -EINVAL;
 819 }
 820
 821 static int snd_es1938_capture_copy(snd_pcm_substream_t *substream,
 822                                    int channel,
 823                                    snd_pcm_uframes_t pos,
 824                                    void __user *dst,
 825                                    snd_pcm_uframes_t count)
 826 {
 827         snd_pcm_runtime_t *runtime = substream->runtime;
 828         es1938_t *chip = snd_pcm_substream_chip(substream);
 829         pos <<= chip->dma1_shift;
 830         count <<= chip->dma1_shift;
 831         snd_assert(pos + count <= chip->dma1_size, return -EINVAL);
 832         if (pos + count < chip->dma1_size) {
 833                 if (copy_to_user(dst, runtime->dma_area + pos + 1, count))
 834                         return -EFAULT;
 835         } else {
 836                 if (copy_to_user(dst, runtime->dma_area + pos + 1, count - 1))
 837                         return -EFAULT;
 838                 if (put_user(runtime->dma_area[0], ((unsigned char __user *)dst) + count - 1))
 839                         return -EFAULT;
 840         }
 841         return 0;
 842 }
 843
 844 /*
 845  * buffer management
 846  */
 847 static int snd_es1938_pcm_hw_params(snd_pcm_substream_t *substream,
 848                                     snd_pcm_hw_params_t * hw_params)
 849
 850 {
 851         int err;
 852
 853         if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
 854                 return err;
 855         return 0;
 856 }
 857
 858 static int snd_es1938_pcm_hw_free(snd_pcm_substream_t *substream)
 859 {
 860         return snd_pcm_lib_free_pages(substream);
 861 }
 862
 863 /* ----------------------------------------------------------------------
 864  * Audio1 Capture (ADC)
 865  * ----------------------------------------------------------------------*/
 866 static snd_pcm_hardware_t snd_es1938_capture =
 867 {
 868         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 869                                 SNDRV_PCM_INFO_BLOCK_TRANSFER),
 870         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE,
 871         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 872         .rate_min =             6000,
 873         .rate_max =             48000,
 874         .channels_min =         1,
 875         .channels_max =         2,
 876         .buffer_bytes_max =     0x8000,       /* DMA controller screws on higher values */
 877         .period_bytes_min =     64,
 878         .period_bytes_max =     0x8000,
 879         .periods_min =          1,
 880         .periods_max =          1024,
 881         .fifo_size =            256,
 882 };
 883
 884 /* -----------------------------------------------------------------------
 885  * Audio2 Playback (DAC)
 886  * -----------------------------------------------------------------------*/
 887 static snd_pcm_hardware_t snd_es1938_playback =
 888 {
 889         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 890                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 891                                  SNDRV_PCM_INFO_MMAP_VALID),
 892         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE,
 893         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 894         .rate_min =             6000,
 895         .rate_max =             48000,
 896         .channels_min =         1,
 897         .channels_max =         2,
 898         .buffer_bytes_max =     0x8000,       /* DMA controller screws on higher values */
 899         .period_bytes_min =     64,
 900         .period_bytes_max =     0x8000,
 901         .periods_min =          1,
 902         .periods_max =          1024,
 903         .fifo_size =            256,
 904 };
 905
 906 static int snd_es1938_capture_open(snd_pcm_substream_t * substream)
 907 {
 908         es1938_t *chip = snd_pcm_substream_chip(substream);
 909         snd_pcm_runtime_t *runtime = substream->runtime;
 910
 911         if (chip->playback2_substream)
 912                 return -EAGAIN;
 913         chip->capture_substream = substream;
 914         runtime->hw = snd_es1938_capture;
 915         snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 916                                       &hw_constraints_clocks);
 917         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
 918         return 0;
 919 }
 920
 921 static int snd_es1938_playback_open(snd_pcm_substream_t * substream)
 922 {
 923         es1938_t *chip = snd_pcm_substream_chip(substream);
 924         snd_pcm_runtime_t *runtime = substream->runtime;
 925
 926         switch (substream->number) {
 927         case 0:
 928                 chip->playback1_substream = substream;
 929                 break;
 930         case 1:
 931                 if (chip->capture_substream)
 932                         return -EAGAIN;
 933                 chip->playback2_substream = substream;
 934                 break;
 935         default:
 936                 snd_BUG();
 937                 return -EINVAL;
 938         }
 939         runtime->hw = snd_es1938_playback;
 940         snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 941                                       &hw_constraints_clocks);
 942         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
 943         return 0;
 944 }
 945
 946 static int snd_es1938_capture_close(snd_pcm_substream_t * substream)
 947 {
 948         es1938_t *chip = snd_pcm_substream_chip(substream);
 949
 950         chip->capture_substream = NULL;
 951         return 0;
 952 }
 953
 954 static int snd_es1938_playback_close(snd_pcm_substream_t * substream)
 955 {
 956         es1938_t *chip = snd_pcm_substream_chip(substream);
 957
 958         switch (substream->number) {
 959         case 0:
 960                 chip->playback1_substream = NULL;
 961                 break;
 962         case 1:
 963                 chip->playback2_substream = NULL;
 964                 break;
 965         default:
 966                 snd_BUG();
 967                 return -EINVAL;
 968         }
 969         return 0;
 970 }
 971
 972 static snd_pcm_ops_t snd_es1938_playback_ops = {
 973         .open =         snd_es1938_playback_open,
 974         .close =        snd_es1938_playback_close,
 975         .ioctl =        snd_pcm_lib_ioctl,
 976         .hw_params =    snd_es1938_pcm_hw_params,
 977         .hw_free =      snd_es1938_pcm_hw_free,
 978         .prepare =      snd_es1938_playback_prepare,
 979         .trigger =      snd_es1938_playback_trigger,
 980         .pointer =      snd_es1938_playback_pointer,
 981 };
 982
 983 static snd_pcm_ops_t snd_es1938_capture_ops = {
 984         .open =         snd_es1938_capture_open,
 985         .close =        snd_es1938_capture_close,
 986         .ioctl =        snd_pcm_lib_ioctl,
 987         .hw_params =    snd_es1938_pcm_hw_params,
 988         .hw_free =      snd_es1938_pcm_hw_free,
 989         .prepare =      snd_es1938_capture_prepare,
 990         .trigger =      snd_es1938_capture_trigger,
 991         .pointer =      snd_es1938_capture_pointer,
 992         .copy =         snd_es1938_capture_copy,
 993 };
 994
 995 static void snd_es1938_free_pcm(snd_pcm_t *pcm)
 996 {
 997         snd_pcm_lib_preallocate_free_for_all(pcm);
 998 }
 999
1000 static int __devinit snd_es1938_new_pcm(es1938_t *chip, int device)
1001 {
1002         snd_pcm_t *pcm;
1003         int err;
1004
1005         if ((err = snd_pcm_new(chip->card, "es-1938-1946", device, 2, 1, &pcm)) < 0)
1006                 return err;
1007         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es1938_playback_ops);
1008         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es1938_capture_ops);
1009
1010         pcm->private_data = chip;
1011         pcm->private_free = snd_es1938_free_pcm;
1012         pcm->info_flags = 0;
1013         strcpy(pcm->name, "ESS Solo-1");
1014
1015         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1016                                               snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
1017
1018         chip->pcm = pcm;
1019         return 0;
1020 }
1021
1022 /* -------------------------------------------------------------------
1023  *
1024  *                       *** Mixer part ***
1025  */
1026
1027 static int snd_es1938_info_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1028 {
1029         static char *texts[8] = {
1030                 "Mic", "Mic Master", "CD", "AOUT",
1031                 "Mic1", "Mix", "Line", "Master"
1032         };
1033
1034         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1035         uinfo->count = 1;
1036         uinfo->value.enumerated.items = 8;
1037         if (uinfo->value.enumerated.item > 7)
1038                 uinfo->value.enumerated.item = 7;
1039         strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
1040         return 0;
1041 }
1042
1043 static int snd_es1938_get_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1044 {
1045         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1046         ucontrol->value.enumerated.item[0] = snd_es1938_mixer_read(chip, 0x1c) & 0x07;
1047         return 0;
1048 }
1049
1050 static int snd_es1938_put_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1051 {
1052         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1053         unsigned char val = ucontrol->value.enumerated.item[0];
1054
1055         if (val > 7)
1056                 return -EINVAL;
1057         return snd_es1938_mixer_bits(chip, 0x1c, 0x07, val) != val;
1058 }
1059
1060 static int snd_es1938_info_spatializer_enable(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1061 {
1062         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1063         uinfo->count = 1;
1064         uinfo->value.integer.min = 0;
1065         uinfo->value.integer.max = 1;
1066         return 0;
1067 }
1068
1069 static int snd_es1938_get_spatializer_enable(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1070 {
1071         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1072         unsigned char val = snd_es1938_mixer_read(chip, 0x50);
1073         ucontrol->value.integer.value[0] = !!(val & 8);
1074         return 0;
1075 }
1076
1077 static int snd_es1938_put_spatializer_enable(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1078 {
1079         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1080         unsigned char oval, nval;
1081         int change;
1082         nval = ucontrol->value.integer.value[0] ? 0x0c : 0x04;
1083         oval = snd_es1938_mixer_read(chip, 0x50) & 0x0c;
1084         change = nval != oval;
1085         if (change) {
1086                 snd_es1938_mixer_write(chip, 0x50, nval & ~0x04);
1087                 snd_es1938_mixer_write(chip, 0x50, nval);
1088         }
1089         return change;
1090 }
1091
1092 static int snd_es1938_info_hw_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1093 {
1094         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1095         uinfo->count = 2;
1096         uinfo->value.integer.min = 0;
1097         uinfo->value.integer.max = 63;
1098         return 0;
1099 }
1100
1101 static int snd_es1938_get_hw_volume(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1102 {
1103         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1104         ucontrol->value.integer.value[0] = snd_es1938_mixer_read(chip, 0x61) & 0x3f;
1105         ucontrol->value.integer.value[1] = snd_es1938_mixer_read(chip, 0x63) & 0x3f;
1106         return 0;
1107 }
1108
1109 static int snd_es1938_info_hw_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1110 {
1111         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1112         uinfo->count = 2;
1113         uinfo->value.integer.min = 0;
1114         uinfo->value.integer.max = 1;
1115         return 0;
1116 }
1117
1118 static int snd_es1938_get_hw_switch(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1119 {
1120         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1121         ucontrol->value.integer.value[0] = !(snd_es1938_mixer_read(chip, 0x61) & 0x40);
1122         ucontrol->value.integer.value[1] = !(snd_es1938_mixer_read(chip, 0x63) & 0x40);
1123         return 0;
1124 }
1125
1126 static void snd_es1938_hwv_free(snd_kcontrol_t *kcontrol)
1127 {
1128         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1129         chip->master_volume = NULL;
1130         chip->master_switch = NULL;
1131         chip->hw_volume = NULL;
1132         chip->hw_switch = NULL;
1133 }
1134
1135 static int snd_es1938_reg_bits(es1938_t *chip, unsigned char reg,
1136                                unsigned char mask, unsigned char val)
1137 {
1138         if (reg < 0xa0)
1139                 return snd_es1938_mixer_bits(chip, reg, mask, val);
1140         else
1141                 return snd_es1938_bits(chip, reg, mask, val);
1142 }
1143
1144 static int snd_es1938_reg_read(es1938_t *chip, unsigned char reg)
1145 {
1146         if (reg < 0xa0)
1147                 return snd_es1938_mixer_read(chip, reg);
1148         else
1149                 return snd_es1938_read(chip, reg);
1150 }
1151
1152 #define ES1938_SINGLE(xname, xindex, reg, shift, mask, invert) \
1153 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1154   .info = snd_es1938_info_single, \
1155   .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
1156   .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }
1157
1158 static int snd_es1938_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1159 {
1160         int mask = (kcontrol->private_value >> 16) & 0xff;
1161
1162         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1163         uinfo->count = 1;
1164         uinfo->value.integer.min = 0;
1165         uinfo->value.integer.max = mask;
1166         return 0;
1167 }
1168
1169 static int snd_es1938_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1170 {
1171         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1172         int reg = kcontrol->private_value & 0xff;
1173         int shift = (kcontrol->private_value >> 8) & 0xff;
1174         int mask = (kcontrol->private_value >> 16) & 0xff;
1175         int invert = (kcontrol->private_value >> 24) & 0xff;
1176         int val;
1177
1178         val = snd_es1938_reg_read(chip, reg);
1179         ucontrol->value.integer.value[0] = (val >> shift) & mask;
1180         if (invert)
1181                 ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
1182         return 0;
1183 }
1184
1185 static int snd_es1938_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1186 {
1187         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1188         int reg = kcontrol->private_value & 0xff;
1189         int shift = (kcontrol->private_value >> 8) & 0xff;
1190         int mask = (kcontrol->private_value >> 16) & 0xff;
1191         int invert = (kcontrol->private_value >> 24) & 0xff;
1192         unsigned char val;
1193
1194         val = (ucontrol->value.integer.value[0] & mask);
1195         if (invert)
1196                 val = mask - val;
1197         mask <<= shift;
1198         val <<= shift;
1199         return snd_es1938_reg_bits(chip, reg, mask, val) != val;
1200 }
1201
1202 #define ES1938_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
1203 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1204   .info = snd_es1938_info_double, \
1205   .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
1206   .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }
1207
1208 static int snd_es1938_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1209 {
1210         int mask = (kcontrol->private_value >> 24) & 0xff;
1211
1212         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1213         uinfo->count = 2;
1214         uinfo->value.integer.min = 0;
1215         uinfo->value.integer.max = mask;
1216         return 0;
1217 }
1218
1219 static int snd_es1938_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1220 {
1221         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1222         int left_reg = kcontrol->private_value & 0xff;
1223         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1224         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1225         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1226         int mask = (kcontrol->private_value >> 24) & 0xff;
1227         int invert = (kcontrol->private_value >> 22) & 1;
1228         unsigned char left, right;
1229
1230         left = snd_es1938_reg_read(chip, left_reg);
1231         if (left_reg != right_reg)
1232                 right = snd_es1938_reg_read(chip, right_reg);
1233         else
1234                 right = left;
1235         ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
1236         ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
1237         if (invert) {
1238                 ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
1239                 ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
1240         }
1241         return 0;
1242 }
1243
1244 static int snd_es1938_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1245 {
1246         es1938_t *chip = snd_kcontrol_chip(kcontrol);
1247         int left_reg = kcontrol->private_value & 0xff;
1248         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1249         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1250         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1251         int mask = (kcontrol->private_value >> 24) & 0xff;
1252         int invert = (kcontrol->private_value >> 22) & 1;
1253         int change;
1254         unsigned char val1, val2, mask1, mask2;
1255
1256         val1 = ucontrol->value.integer.value[0] & mask;
1257         val2 = ucontrol->value.integer.value[1] & mask;
1258         if (invert) {
1259                 val1 = mask - val1;
1260                 val2 = mask - val2;
1261         }
1262         val1 <<= shift_left;
1263         val2 <<= shift_right;
1264         mask1 = mask << shift_left;
1265         mask2 = mask << shift_right;
1266         if (left_reg != right_reg) {
1267                 change = 0;
1268                 if (snd_es1938_reg_bits(chip, left_reg, mask1, val1) != val1)
1269                         change = 1;
1270                 if (snd_es1938_reg_bits(chip, right_reg, mask2, val2) != val2)
1271                         change = 1;
1272         } else {
1273                 change = (snd_es1938_reg_bits(chip, left_reg, mask1 | mask2,
1274                                               val1 | val2) != (val1 | val2));
1275         }
1276         return change;
1277 }
1278
1279 static snd_kcontrol_new_t snd_es1938_controls[] = {
1280 ES1938_DOUBLE("Master Playback Volume", 0, 0x60, 0x62, 0, 0, 63, 0),
1281 ES1938_DOUBLE("Master Playback Switch", 0, 0x60, 0x62, 6, 6, 1, 1),
1282 {
1283         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1284         .name = "Hardware Master Playback Volume",
1285         .access = SNDRV_CTL_ELEM_ACCESS_READ,
1286         .info = snd_es1938_info_hw_volume,
1287         .get = snd_es1938_get_hw_volume,
1288 },
1289 {
1290         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1291         .name = "Hardware Master Playback Switch",
1292         .access = SNDRV_CTL_ELEM_ACCESS_READ,
1293         .info = snd_es1938_info_hw_switch,
1294         .get = snd_es1938_get_hw_switch,
1295 },
1296 ES1938_SINGLE("Hardware Volume Split", 0, 0x64, 7, 1, 0),
1297 ES1938_DOUBLE("Line Playback Volume", 0, 0x3e, 0x3e, 4, 0, 15, 0),
1298 ES1938_DOUBLE("CD Playback Volume", 0, 0x38, 0x38, 4, 0, 15, 0),
1299 ES1938_DOUBLE("FM Playback Volume", 0, 0x36, 0x36, 4, 0, 15, 0),
1300 ES1938_DOUBLE("Mono Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0),
1301 ES1938_DOUBLE("Mic Playback Volume", 0, 0x1a, 0x1a, 4, 0, 15, 0),
1302 ES1938_DOUBLE("Aux Playback Volume", 0, 0x3a, 0x3a, 4, 0, 15, 0),
1303 ES1938_DOUBLE("Capture Volume", 0, 0xb4, 0xb4, 4, 0, 15, 0),
1304 ES1938_SINGLE("PC Speaker Volume", 0, 0x3c, 0, 7, 0),
1305 ES1938_SINGLE("Record Monitor", 0, 0xa8, 3, 1, 0),
1306 ES1938_SINGLE("Capture Switch", 0, 0x1c, 4, 1, 1),
1307 {
1308         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1309         .name = "Capture Source",
1310         .info = snd_es1938_info_mux,
1311         .get = snd_es1938_get_mux,
1312         .put = snd_es1938_put_mux,
1313 },
1314 ES1938_DOUBLE("Mono Input Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0),
1315 ES1938_DOUBLE("PCM Capture Volume", 0, 0x69, 0x69, 4, 0, 15, 0),
1316 ES1938_DOUBLE("Mic Capture Volume", 0, 0x68, 0x68, 4, 0, 15, 0),
1317 ES1938_DOUBLE("Line Capture Volume", 0, 0x6e, 0x6e, 4, 0, 15, 0),
1318 ES1938_DOUBLE("FM Capture Volume", 0, 0x6b, 0x6b, 4, 0, 15, 0),
1319 ES1938_DOUBLE("Mono Capture Volume", 0, 0x6f, 0x6f, 4, 0, 15, 0),
1320 ES1938_DOUBLE("CD Capture Volume", 0, 0x6a, 0x6a, 4, 0, 15, 0),
1321 ES1938_DOUBLE("Aux Capture Volume", 0, 0x6c, 0x6c, 4, 0, 15, 0),
1322 ES1938_DOUBLE("PCM Playback Volume", 0, 0x7c, 0x7c, 4, 0, 15, 0),
1323 ES1938_DOUBLE("PCM Playback Volume", 1, 0x14, 0x14, 4, 0, 15, 0),
1324 ES1938_SINGLE("3D Control - Level", 0, 0x52, 0, 63, 0),
1325 {
1326         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1327         .name = "3D Control - Switch",
1328         .info = snd_es1938_info_spatializer_enable,
1329         .get = snd_es1938_get_spatializer_enable,
1330         .put = snd_es1938_put_spatializer_enable,
1331 },
1332 ES1938_SINGLE("Mic Boost (+26dB)", 0, 0x7d, 3, 1, 0)
1333 };
1334
1335
1336 /* ---------------------------------------------------------------------------- */
1337 /* ---------------------------------------------------------------------------- */
1338
1339 /*
1340  * initialize the chip - used by resume callback, too
1341  */
1342 static void snd_es1938_chip_init(es1938_t *chip)
1343 {
1344         /* reset chip */
1345         snd_es1938_reset(chip);
1346
1347         /* configure native mode */
1348
1349         /* enable bus master */
1350         pci_set_master(chip->pci);
1351
1352         /* disable legacy audio */
1353         pci_write_config_word(chip->pci, SL_PCI_LEGACYCONTROL, 0x805f);
1354
1355         /* set DDMA base */
1356         pci_write_config_word(chip->pci, SL_PCI_DDMACONTROL, chip->ddma_port | 1);
1357
1358         /* set DMA/IRQ policy */
1359         pci_write_config_dword(chip->pci, SL_PCI_CONFIG, 0);
1360
1361         /* enable Audio 1, Audio 2, MPU401 IRQ and HW volume IRQ*/
1362         outb(0xf0, SLIO_REG(chip, IRQCONTROL));
1363
1364         /* reset DMA */
1365         outb(0, SLDM_REG(chip, DMACLEAR));
1366 }
1367
1368 #ifdef CONFIG_PM
1369 /*
1370  * PM support
1371  */
1372
1373 static unsigned char saved_regs[SAVED_REG_SIZE+1] = {
1374         0x14, 0x1a, 0x1c, 0x3a, 0x3c, 0x3e, 0x36, 0x38,
1375         0x50, 0x52, 0x60, 0x61, 0x62, 0x63, 0x64, 0x68,
1376         0x69, 0x6a, 0x6b, 0x6d, 0x6e, 0x6f, 0x7c, 0x7d,
1377         0xa8, 0xb4,
1378 };
1379
1380
1381 static int es1938_suspend(snd_card_t *card, pm_message_t state)
1382 {
1383         es1938_t *chip = card->pm_private_data;
1384         unsigned char *s, *d;
1385
1386         snd_pcm_suspend_all(chip->pcm);
1387
1388         /* save mixer-related registers */
1389         for (s = saved_regs, d = chip->saved_regs; *s; s++, d++)
1390                 *d = snd_es1938_reg_read(chip, *s);
1391
1392         outb(0x00, SLIO_REG(chip, IRQCONTROL)); /* disable irqs */
1393
1394         pci_disable_device(chip->pci);
1395         return 0;
1396 }
1397
1398 static int es1938_resume(snd_card_t *card)
1399 {
1400         es1938_t *chip = card->pm_private_data;
1401         unsigned char *s, *d;
1402
1403         pci_enable_device(chip->pci);
1404         snd_es1938_chip_init(chip);
1405
1406         /* restore mixer-related registers */
1407         for (s = saved_regs, d = chip->saved_regs; *s; s++, d++) {
1408                 if (*s < 0xa0)
1409                         snd_es1938_mixer_write(chip, *s, *d);
1410                 else
1411                         snd_es1938_write(chip, *s, *d);
1412         }
1413
1414         return 0;
1415 }
1416 #endif /* CONFIG_PM */
1417
1418 #ifdef SUPPORT_JOYSTICK
1419 static int __devinit snd_es1938_create_gameport(es1938_t *chip)
1420 {
1421         struct gameport *gp;
1422
1423         chip->gameport = gp = gameport_allocate_port();
1424         if (!gp) {
1425                 printk(KERN_ERR "es1938: cannot allocate memory for gameport\n");
1426                 return -ENOMEM;
1427         }
1428
1429         gameport_set_name(gp, "ES1938");
1430         gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
1431         gameport_set_dev_parent(gp, &chip->pci->dev);
1432         gp->io = chip->game_port;
1433
1434         gameport_register_port(gp);
1435
1436         return 0;
1437 }
1438
1439 static void snd_es1938_free_gameport(es1938_t *chip)
1440 {
1441         if (chip->gameport) {
1442                 gameport_unregister_port(chip->gameport);
1443                 chip->gameport = NULL;
1444         }
1445 }
1446 #else
1447 static inline int snd_es1938_create_gameport(es1938_t *chip) { return -ENOSYS; }
1448 static inline void snd_es1938_free_gameport(es1938_t *chip) { }
1449 #endif /* SUPPORT_JOYSTICK */
1450
1451 static int snd_es1938_free(es1938_t *chip)
1452 {
1453         /* disable irqs */
1454         outb(0x00, SLIO_REG(chip, IRQCONTROL));
1455         if (chip->rmidi)
1456                 snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0);
1457
1458         snd_es1938_free_gameport(chip);
1459
1460         if (chip->irq >= 0)
1461                 free_irq(chip->irq, (void *)chip);
1462         pci_release_regions(chip->pci);
1463         pci_disable_device(chip->pci);
1464         kfree(chip);
1465         return 0;
1466 }
1467
1468 static int snd_es1938_dev_free(snd_device_t *device)
1469 {
1470         es1938_t *chip = device->device_data;
1471         return snd_es1938_free(chip);
1472 }
1473
1474 static int __devinit snd_es1938_create(snd_card_t * card,
1475                                     struct pci_dev * pci,
1476                                     es1938_t ** rchip)
1477 {
1478         es1938_t *chip;
1479         int err;
1480         static snd_device_ops_t ops = {
1481                 .dev_free =     snd_es1938_dev_free,
1482         };
1483
1484         *rchip = NULL;
1485
1486         /* enable PCI device */
1487         if ((err = pci_enable_device(pci)) < 0)
1488                 return err;
1489         /* check, if we can restrict PCI DMA transfers to 24 bits */
1490         if (pci_set_dma_mask(pci, 0x00ffffff) < 0 ||
1491             pci_set_consistent_dma_mask(pci, 0x00ffffff) < 0) {
1492                 snd_printk("architecture does not support 24bit PCI busmaster DMA\n");
1493                 pci_disable_device(pci);
1494                 return -ENXIO;
1495         }
1496
1497         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1498         if (chip == NULL) {
1499                 pci_disable_device(pci);
1500                 return -ENOMEM;
1501         }
1502         spin_lock_init(&chip->reg_lock);
1503         spin_lock_init(&chip->mixer_lock);
1504         chip->card = card;
1505         chip->pci = pci;
1506         if ((err = pci_request_regions(pci, "ESS Solo-1")) < 0) {
1507                 kfree(chip);
1508                 pci_disable_device(pci);
1509                 return err;
1510         }
1511         chip->io_port = pci_resource_start(pci, 0);
1512         chip->sb_port = pci_resource_start(pci, 1);
1513         chip->vc_port = pci_resource_start(pci, 2);
1514         chip->mpu_port = pci_resource_start(pci, 3);
1515         chip->game_port = pci_resource_start(pci, 4);
1516         if (request_irq(pci->irq, snd_es1938_interrupt, SA_INTERRUPT|SA_SHIRQ, "ES1938", (void *)chip)) {
1517                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1518                 snd_es1938_free(chip);
1519                 return -EBUSY;
1520         }
1521         chip->irq = pci->irq;
1522 #ifdef ES1938_DDEBUG
1523         snd_printk("create: io: 0x%lx, sb: 0x%lx, vc: 0x%lx, mpu: 0x%lx, game: 0x%lx\n",
1524                    chip->io_port, chip->sb_port, chip->vc_port, chip->mpu_port, chip->game_port);
1525 #endif
1526
1527         chip->ddma_port = chip->vc_port + 0x00;         /* fix from Thomas Sailer */
1528
1529         snd_es1938_chip_init(chip);
1530
1531         snd_card_set_pm_callback(card, es1938_suspend, es1938_resume, chip);
1532
1533         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1534                 snd_es1938_free(chip);
1535                 return err;
1536         }
1537
1538         snd_card_set_dev(card, &pci->dev);
1539
1540         *rchip = chip;
1541         return 0;
1542 }
1543
1544 /* --------------------------------------------------------------------
1545  * Interrupt handler
1546  * -------------------------------------------------------------------- */
1547 static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1548 {
1549         es1938_t *chip = dev_id;
1550         unsigned char status, audiostatus;
1551         int handled = 0;
1552
1553         status = inb(SLIO_REG(chip, IRQCONTROL));
1554 #if 0
1555         printk("Es1938debug - interrupt status: =0x%x\n", status);
1556 #endif
1557
1558         /* AUDIO 1 */
1559         if (status & 0x10) {
1560 #if 0
1561                 printk("Es1938debug - AUDIO channel 1 interrupt\n");
1562                 printk("Es1938debug - AUDIO channel 1 DMAC DMA count: %u\n", inw(SLDM_REG(chip, DMACOUNT)));
1563                 printk("Es1938debug - AUDIO channel 1 DMAC DMA base: %u\n", inl(SLDM_REG(chip, DMAADDR)));
1564                 printk("Es1938debug - AUDIO channel 1 DMAC DMA status: 0x%x\n", inl(SLDM_REG(chip, DMASTATUS)));
1565 #endif
1566                 /* clear irq */
1567                 handled = 1;
1568                 audiostatus = inb(SLSB_REG(chip, STATUS));
1569                 if (chip->active & ADC1)
1570                         snd_pcm_period_elapsed(chip->capture_substream);
1571                 else if (chip->active & DAC1)
1572                         snd_pcm_period_elapsed(chip->playback2_substream);
1573         }
1574
1575         /* AUDIO 2 */
1576         if (status & 0x20) {
1577 #if 0
1578                 printk("Es1938debug - AUDIO channel 2 interrupt\n");
1579                 printk("Es1938debug - AUDIO channel 2 DMAC DMA count: %u\n", inw(SLIO_REG(chip, AUDIO2DMACOUNT)));
1580                 printk("Es1938debug - AUDIO channel 2 DMAC DMA base: %u\n", inl(SLIO_REG(chip, AUDIO2DMAADDR)));
1581
1582 #endif
1583                 /* clear irq */
1584                 handled = 1;
1585                 snd_es1938_mixer_bits(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x80, 0);
1586                 if (chip->active & DAC2)
1587                         snd_pcm_period_elapsed(chip->playback1_substream);
1588         }
1589
1590         /* Hardware volume */
1591         if (status & 0x40) {
1592                 int split = snd_es1938_mixer_read(chip, 0x64) & 0x80;
1593                 handled = 1;
1594                 snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_switch->id);
1595                 snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_volume->id);
1596                 if (!split) {
1597                         snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->master_switch->id);
1598                         snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->master_volume->id);
1599                 }
1600                 /* ack interrupt */
1601                 snd_es1938_mixer_write(chip, 0x66, 0x00);
1602         }
1603
1604         /* MPU401 */
1605         if (status & 0x80) {
1606                 // the following line is evil! It switches off MIDI interrupt handling after the first interrupt received.
1607                 // replacing the last 0 by 0x40 works for ESS-Solo1, but just doing nothing works as well!
1608                 // andreas@flying-snail.de
1609                 // snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0); /* ack? */
1610                 if (chip->rmidi) {
1611                         handled = 1;
1612                         snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
1613                 }
1614         }
1615         return IRQ_RETVAL(handled);
1616 }
1617
1618 #define ES1938_DMA_SIZE 64
1619
1620 static int __devinit snd_es1938_mixer(es1938_t *chip)
1621 {
1622         snd_card_t *card;
1623         unsigned int idx;
1624         int err;
1625
1626         card = chip->card;
1627
1628         strcpy(card->mixername, "ESS Solo-1");
1629
1630         for (idx = 0; idx < ARRAY_SIZE(snd_es1938_controls); idx++) {
1631                 snd_kcontrol_t *kctl;
1632                 kctl = snd_ctl_new1(&snd_es1938_controls[idx], chip);
1633                 switch (idx) {
1634                         case 0:
1635                                 chip->master_volume = kctl;
1636                                 kctl->private_free = snd_es1938_hwv_free;
1637                                 break;
1638                         case 1:
1639                                 chip->master_switch = kctl;
1640                                 kctl->private_free = snd_es1938_hwv_free;
1641                                 break;
1642                         case 2:
1643                                 chip->hw_volume = kctl;
1644                                 kctl->private_free = snd_es1938_hwv_free;
1645                                 break;
1646                         case 3:
1647                                 chip->hw_switch = kctl;
1648                                 kctl->private_free = snd_es1938_hwv_free;
1649                                 break;
1650                         }
1651                 if ((err = snd_ctl_add(card, kctl)) < 0)
1652                         return err;
1653         }
1654         return 0;
1655 }
1656
1657
1658 static int __devinit snd_es1938_probe(struct pci_dev *pci,
1659                                       const struct pci_device_id *pci_id)
1660 {
1661         static int dev;
1662         snd_card_t *card;
1663         es1938_t *chip;
1664         opl3_t *opl3;
1665         int idx, err;
1666
1667         if (dev >= SNDRV_CARDS)
1668                 return -ENODEV;
1669         if (!enable[dev]) {
1670                 dev++;
1671                 return -ENOENT;
1672         }
1673
1674         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1675         if (card == NULL)
1676                 return -ENOMEM;
1677         for (idx = 0; idx < 5; idx++) {
1678                 if (pci_resource_start(pci, idx) == 0 ||
1679                     !(pci_resource_flags(pci, idx) & IORESOURCE_IO)) {
1680                         snd_card_free(card);
1681                         return -ENODEV;
1682                 }
1683         }
1684         if ((err = snd_es1938_create(card, pci, &chip)) < 0) {
1685                 snd_card_free(card);
1686                 return err;
1687         }
1688
1689         strcpy(card->driver, "ES1938");
1690         strcpy(card->shortname, "ESS ES1938 (Solo-1)");
1691         sprintf(card->longname, "%s rev %i, irq %i",
1692                 card->shortname,
1693                 chip->revision,
1694                 chip->irq);
1695
1696         if ((err = snd_es1938_new_pcm(chip, 0)) < 0) {
1697                 snd_card_free(card);
1698                 return err;
1699         }
1700         if ((err = snd_es1938_mixer(chip)) < 0) {
1701                 snd_card_free(card);
1702                 return err;
1703         }
1704         if (snd_opl3_create(card,
1705                             SLSB_REG(chip, FMLOWADDR),
1706                             SLSB_REG(chip, FMHIGHADDR),
1707                             OPL3_HW_OPL3, 1, &opl3) < 0) {
1708                 printk(KERN_ERR "es1938: OPL3 not detected at 0x%lx\n",
1709                            SLSB_REG(chip, FMLOWADDR));
1710         } else {
1711                 if ((err = snd_opl3_timer_new(opl3, 0, 1)) < 0) {
1712                         snd_card_free(card);
1713                         return err;
1714                 }
1715                 if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
1716                         snd_card_free(card);
1717                         return err;
1718                 }
1719         }
1720         if (snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
1721                                 chip->mpu_port, 1, chip->irq, 0, &chip->rmidi) < 0) {
1722                 printk(KERN_ERR "es1938: unable to initialize MPU-401\n");
1723         } else {
1724                 // this line is vital for MIDI interrupt handling on ess-solo1
1725                 // andreas@flying-snail.de
1726                 snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0x40);
1727         }
1728
1729         snd_es1938_create_gameport(chip);
1730
1731         if ((err = snd_card_register(card)) < 0) {
1732                 snd_card_free(card);
1733                 return err;
1734         }
1735
1736         pci_set_drvdata(pci, card);
1737         dev++;
1738         return 0;
1739 }
1740
1741 static void __devexit snd_es1938_remove(struct pci_dev *pci)
1742 {
1743         snd_card_free(pci_get_drvdata(pci));
1744         pci_set_drvdata(pci, NULL);
1745 }
1746
1747 static struct pci_driver driver = {
1748         .name = "ESS ES1938 (Solo-1)",
1749         .owner = THIS_MODULE,
1750         .id_table = snd_es1938_ids,
1751         .probe = snd_es1938_probe,
1752         .remove = __devexit_p(snd_es1938_remove),
1753         SND_PCI_PM_CALLBACKS
1754 };
1755
1756 static int __init alsa_card_es1938_init(void)
1757 {
1758         return pci_register_driver(&driver);
1759 }
1760
1761 static void __exit alsa_card_es1938_exit(void)
1762 {
1763         pci_unregister_driver(&driver);
1764 }
1765
1766 module_init(alsa_card_es1938_init)
1767 module_exit(alsa_card_es1938_exit)