sound/isa/cs423x/cs4231_lib.c

   1 /*
   2  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   3  *  Routines for control of CS4231(A)/CS4232/InterWave & compatible chips
   4  *
   5  *  Bugs:
   6  *     - sometimes record brokes playback with WSS portion of
   7  *       Yamaha OPL3-SA3 chip
   8  *     - CS4231 (GUS MAX) - still trouble with occasional noises
   9  *                        - broken initialization?
  10  *
  11  *   This program is free software; you can redistribute it and/or modify
  12  *   it under the terms of the GNU General Public License as published by
  13  *   the Free Software Foundation; either version 2 of the License, or
  14  *   (at your option) any later version.
  15  *
  16  *   This program is distributed in the hope that it will be useful,
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *   GNU General Public License for more details.
  20  *
  21  *   You should have received a copy of the GNU General Public License
  22  *   along with this program; if not, write to the Free Software
  23  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  24  *
  25  */
  26
  27 #include <sound/driver.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/init.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/slab.h>
  33 #include <linux/ioport.h>
  34 #include <sound/core.h>
  35 #include <sound/cs4231.h>
  36 #include <sound/pcm_params.h>
  37
  38 #include <asm/io.h>
  39 #include <asm/dma.h>
  40 #include <asm/irq.h>
  41
  42 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  43 MODULE_DESCRIPTION("Routines for control of CS4231(A)/CS4232/InterWave & compatible chips");
  44 MODULE_LICENSE("GPL");
  45
  46 #define chip_t cs4231_t
  47
  48 #if 0
  49 #define SNDRV_DEBUG_MCE
  50 #endif
  51
  52 /*
  53  *  Some variables
  54  */
  55
  56 static unsigned char freq_bits[14] = {
  57         /* 5510 */      0x00 | CS4231_XTAL2,
  58         /* 6620 */      0x0E | CS4231_XTAL2,
  59         /* 8000 */      0x00 | CS4231_XTAL1,
  60         /* 9600 */      0x0E | CS4231_XTAL1,
  61         /* 11025 */     0x02 | CS4231_XTAL2,
  62         /* 16000 */     0x02 | CS4231_XTAL1,
  63         /* 18900 */     0x04 | CS4231_XTAL2,
  64         /* 22050 */     0x06 | CS4231_XTAL2,
  65         /* 27042 */     0x04 | CS4231_XTAL1,
  66         /* 32000 */     0x06 | CS4231_XTAL1,
  67         /* 33075 */     0x0C | CS4231_XTAL2,
  68         /* 37800 */     0x08 | CS4231_XTAL2,
  69         /* 44100 */     0x0A | CS4231_XTAL2,
  70         /* 48000 */     0x0C | CS4231_XTAL1
  71 };
  72
  73 static unsigned int rates[14] = {
  74         5510, 6620, 8000, 9600, 11025, 16000, 18900, 22050,
  75         27042, 32000, 33075, 37800, 44100, 48000
  76 };
  77
  78 static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
  79         .count = 14,
  80         .list = rates,
  81         .mask = 0,
  82 };
  83
  84 static int snd_cs4231_xrate(snd_pcm_runtime_t *runtime)
  85 {
  86         return snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates);
  87 }
  88
  89 static unsigned char snd_cs4231_original_image[32] =
  90 {
  91         0x00,                   /* 00/00 - lic */
  92         0x00,                   /* 01/01 - ric */
  93         0x9f,                   /* 02/02 - la1ic */
  94         0x9f,                   /* 03/03 - ra1ic */
  95         0x9f,                   /* 04/04 - la2ic */
  96         0x9f,                   /* 05/05 - ra2ic */
  97         0xbf,                   /* 06/06 - loc */
  98         0xbf,                   /* 07/07 - roc */
  99         0x20,                   /* 08/08 - pdfr */
 100         CS4231_AUTOCALIB,       /* 09/09 - ic */
 101         0x00,                   /* 0a/10 - pc */
 102         0x00,                   /* 0b/11 - ti */
 103         CS4231_MODE2,           /* 0c/12 - mi */
 104         0xfc,                   /* 0d/13 - lbc */
 105         0x00,                   /* 0e/14 - pbru */
 106         0x00,                   /* 0f/15 - pbrl */
 107         0x80,                   /* 10/16 - afei */
 108         0x01,                   /* 11/17 - afeii */
 109         0x9f,                   /* 12/18 - llic */
 110         0x9f,                   /* 13/19 - rlic */
 111         0x00,                   /* 14/20 - tlb */
 112         0x00,                   /* 15/21 - thb */
 113         0x00,                   /* 16/22 - la3mic/reserved */
 114         0x00,                   /* 17/23 - ra3mic/reserved */
 115         0x00,                   /* 18/24 - afs */
 116         0x00,                   /* 19/25 - lamoc/version */
 117         0xcf,                   /* 1a/26 - mioc */
 118         0x00,                   /* 1b/27 - ramoc/reserved */
 119         0x20,                   /* 1c/28 - cdfr */
 120         0x00,                   /* 1d/29 - res4 */
 121         0x00,                   /* 1e/30 - cbru */
 122         0x00,                   /* 1f/31 - cbrl */
 123 };
 124
 125 /*
 126  *  Basic I/O functions
 127  */
 128
 129 #if !defined(EBUS_SUPPORT) && !defined(SBUS_SUPPORT)
 130 #define __CS4231_INLINE__ inline
 131 #else
 132 #define __CS4231_INLINE__ /* nothing */
 133 #endif
 134
 135 static __CS4231_INLINE__ void cs4231_outb(cs4231_t *chip, u8 offset, u8 val)
 136 {
 137 #ifdef EBUS_SUPPORT
 138         if (chip->ebus->flag) {
 139                 writeb(val, chip->port + (offset << 2));
 140         } else {
 141 #endif
 142 #ifdef SBUS_SUPPORT
 143                 sbus_writeb(val, chip->port + (offset << 2));
 144 #endif
 145 #ifdef EBUS_SUPPORT
 146         }
 147 #endif
 148 #ifdef LEGACY_SUPPORT
 149         outb(val, chip->port + offset);
 150 #endif
 151 }
 152
 153 static __CS4231_INLINE__ u8 cs4231_inb(cs4231_t *chip, u8 offset)
 154 {
 155 #ifdef EBUS_SUPPORT
 156         if (chip->ebus_flag) {
 157                 return readb(chip->port + (offset << 2));
 158         } else {
 159 #endif
 160 #ifdef SBUS_SUPPORT
 161                 return sbus_readb(chip->port + (offset << 2));
 162 #endif
 163 #ifdef EBUS_SUPPORT
 164         }
 165 #endif
 166 #ifdef LEGACY_SUPPORT
 167         return inb(chip->port + offset);
 168 #endif
 169 }
 170
 171 void snd_cs4231_outm(cs4231_t *chip, unsigned char reg,
 172                      unsigned char mask, unsigned char value)
 173 {
 174         int timeout;
 175         unsigned char tmp;
 176
 177         for (timeout = 250;
 178              timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
 179              timeout--)
 180                 udelay(100);
 181 #ifdef CONFIG_SND_DEBUG
 182         if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
 183                 snd_printk("outm: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
 184 #endif
 185         if (chip->calibrate_mute) {
 186                 chip->image[reg] &= mask;
 187                 chip->image[reg] |= value;
 188         } else {
 189                 cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 190                 mb();
 191                 tmp = (chip->image[reg] & mask) | value;
 192                 cs4231_outb(chip, CS4231P(REG), tmp);
 193                 chip->image[reg] = tmp;
 194                 mb();
 195         }
 196 }
 197
 198 static void snd_cs4231_dout(cs4231_t *chip, unsigned char reg, unsigned char value)
 199 {
 200         int timeout;
 201
 202         for (timeout = 250;
 203              timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
 204              timeout--)
 205                 udelay(10);
 206         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 207         cs4231_outb(chip, CS4231P(REG), value);
 208         mb();
 209 }
 210
 211 void snd_cs4231_out(cs4231_t *chip, unsigned char reg, unsigned char value)
 212 {
 213         int timeout;
 214
 215         for (timeout = 250;
 216              timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
 217              timeout--)
 218                 udelay(100);
 219 #ifdef CONFIG_SND_DEBUG
 220         if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
 221                 snd_printk("out: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
 222 #endif
 223         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 224         cs4231_outb(chip, CS4231P(REG), value);
 225         chip->image[reg] = value;
 226         mb();
 227 #if 0
 228         printk("codec out - reg 0x%x = 0x%x\n", chip->mce_bit | reg, value);
 229 #endif
 230 }
 231
 232 unsigned char snd_cs4231_in(cs4231_t *chip, unsigned char reg)
 233 {
 234         int timeout;
 235
 236         for (timeout = 250;
 237              timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
 238              timeout--)
 239                 udelay(100);
 240 #ifdef CONFIG_SND_DEBUG
 241         if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
 242                 snd_printk("in: auto calibration time out - reg = 0x%x\n", reg);
 243 #endif
 244         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 245         mb();
 246         return cs4231_inb(chip, CS4231P(REG));
 247 }
 248
 249 void snd_cs4236_ext_out(cs4231_t *chip, unsigned char reg, unsigned char val)
 250 {
 251         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | 0x17);
 252         cs4231_outb(chip, CS4231P(REG), reg | (chip->image[CS4236_EXT_REG] & 0x01));
 253         cs4231_outb(chip, CS4231P(REG), val);
 254         chip->eimage[CS4236_REG(reg)] = val;
 255 #if 0
 256         printk("ext out : reg = 0x%x, val = 0x%x\n", reg, val);
 257 #endif
 258 }
 259
 260 unsigned char snd_cs4236_ext_in(cs4231_t *chip, unsigned char reg)
 261 {
 262         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | 0x17);
 263         cs4231_outb(chip, CS4231P(REG), reg | (chip->image[CS4236_EXT_REG] & 0x01));
 264 #if 1
 265         return cs4231_inb(chip, CS4231P(REG));
 266 #else
 267         {
 268                 unsigned char res;
 269                 res = cs4231_inb(chip, CS4231P(REG));
 270                 printk("ext in : reg = 0x%x, val = 0x%x\n", reg, res);
 271                 return res;
 272         }
 273 #endif
 274 }
 275
 276 #ifdef CONFIG_SND_DEBUG
 277
 278 void snd_cs4231_debug(cs4231_t *chip)
 279 {
 280         printk("CS4231 REGS:      INDEX = 0x%02x  ", cs4231_inb(chip, CS4231P(REGSEL)));
 281         printk("                 STATUS = 0x%02x\n", cs4231_inb(chip, CS4231P(STATUS)));
 282         printk("  0x00: left input      = 0x%02x  ", snd_cs4231_in(chip, 0x00));
 283         printk("  0x10: alt 1 (CFIG 2)  = 0x%02x\n", snd_cs4231_in(chip, 0x10));
 284         printk("  0x01: right input     = 0x%02x  ", snd_cs4231_in(chip, 0x01));
 285         printk("  0x11: alt 2 (CFIG 3)  = 0x%02x\n", snd_cs4231_in(chip, 0x11));
 286         printk("  0x02: GF1 left input  = 0x%02x  ", snd_cs4231_in(chip, 0x02));
 287         printk("  0x12: left line in    = 0x%02x\n", snd_cs4231_in(chip, 0x12));
 288         printk("  0x03: GF1 right input = 0x%02x  ", snd_cs4231_in(chip, 0x03));
 289         printk("  0x13: right line in   = 0x%02x\n", snd_cs4231_in(chip, 0x13));
 290         printk("  0x04: CD left input   = 0x%02x  ", snd_cs4231_in(chip, 0x04));
 291         printk("  0x14: timer low       = 0x%02x\n", snd_cs4231_in(chip, 0x14));
 292         printk("  0x05: CD right input  = 0x%02x  ", snd_cs4231_in(chip, 0x05));
 293         printk("  0x15: timer high      = 0x%02x\n", snd_cs4231_in(chip, 0x15));
 294         printk("  0x06: left output     = 0x%02x  ", snd_cs4231_in(chip, 0x06));
 295         printk("  0x16: left MIC (PnP)  = 0x%02x\n", snd_cs4231_in(chip, 0x16));
 296         printk("  0x07: right output    = 0x%02x  ", snd_cs4231_in(chip, 0x07));
 297         printk("  0x17: right MIC (PnP) = 0x%02x\n", snd_cs4231_in(chip, 0x17));
 298         printk("  0x08: playback format = 0x%02x  ", snd_cs4231_in(chip, 0x08));
 299         printk("  0x18: IRQ status      = 0x%02x\n", snd_cs4231_in(chip, 0x18));
 300         printk("  0x09: iface (CFIG 1)  = 0x%02x  ", snd_cs4231_in(chip, 0x09));
 301         printk("  0x19: left line out   = 0x%02x\n", snd_cs4231_in(chip, 0x19));
 302         printk("  0x0a: pin control     = 0x%02x  ", snd_cs4231_in(chip, 0x0a));
 303         printk("  0x1a: mono control    = 0x%02x\n", snd_cs4231_in(chip, 0x1a));
 304         printk("  0x0b: init & status   = 0x%02x  ", snd_cs4231_in(chip, 0x0b));
 305         printk("  0x1b: right line out  = 0x%02x\n", snd_cs4231_in(chip, 0x1b));
 306         printk("  0x0c: revision & mode = 0x%02x  ", snd_cs4231_in(chip, 0x0c));
 307         printk("  0x1c: record format   = 0x%02x\n", snd_cs4231_in(chip, 0x1c));
 308         printk("  0x0d: loopback        = 0x%02x  ", snd_cs4231_in(chip, 0x0d));
 309         printk("  0x1d: var freq (PnP)  = 0x%02x\n", snd_cs4231_in(chip, 0x1d));
 310         printk("  0x0e: ply upr count   = 0x%02x  ", snd_cs4231_in(chip, 0x0e));
 311         printk("  0x1e: ply lwr count   = 0x%02x\n", snd_cs4231_in(chip, 0x1e));
 312         printk("  0x0f: rec upr count   = 0x%02x  ", snd_cs4231_in(chip, 0x0f));
 313         printk("  0x1f: rec lwr count   = 0x%02x\n", snd_cs4231_in(chip, 0x1f));
 314 }
 315
 316 #endif
 317
 318 /*
 319  *  CS4231 detection / MCE routines
 320  */
 321
 322 static void snd_cs4231_busy_wait(cs4231_t *chip)
 323 {
 324         int timeout;
 325
 326         /* huh.. looks like this sequence is proper for CS4231A chip (GUS MAX) */
 327         for (timeout = 5; timeout > 0; timeout--)
 328                 cs4231_inb(chip, CS4231P(REGSEL));
 329         /* end of cleanup sequence */
 330         for (timeout = 250;
 331              timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
 332              timeout--)
 333                 udelay(10);
 334 }
 335
 336 void snd_cs4231_mce_up(cs4231_t *chip)
 337 {
 338         unsigned long flags;
 339         int timeout;
 340
 341         for (timeout = 250; timeout > 0 && (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT); timeout--)
 342                 udelay(100);
 343 #ifdef CONFIG_SND_DEBUG
 344         if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
 345                 snd_printk("mce_up - auto calibration time out (0)\n");
 346 #endif
 347         spin_lock_irqsave(&chip->reg_lock, flags);
 348         chip->mce_bit |= CS4231_MCE;
 349         timeout = cs4231_inb(chip, CS4231P(REGSEL));
 350         if (timeout == 0x80)
 351                 snd_printk("mce_up [0x%lx]: serious init problem - codec still busy\n", chip->port);
 352         if (!(timeout & CS4231_MCE))
 353                 cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
 354         spin_unlock_irqrestore(&chip->reg_lock, flags);
 355 }
 356
 357 void snd_cs4231_mce_down(cs4231_t *chip)
 358 {
 359         unsigned long flags;
 360         int timeout;
 361         signed long time;
 362
 363         snd_cs4231_busy_wait(chip);
 364 #if 0
 365         printk("(1) timeout = %i\n", timeout);
 366 #endif
 367 #ifdef CONFIG_SND_DEBUG
 368         if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
 369                 snd_printk("mce_down [0x%lx] - auto calibration time out (0)\n", (long)CS4231P(REGSEL));
 370 #endif
 371         spin_lock_irqsave(&chip->reg_lock, flags);
 372         chip->mce_bit &= ~CS4231_MCE;
 373         timeout = cs4231_inb(chip, CS4231P(REGSEL));
 374         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
 375         spin_unlock_irqrestore(&chip->reg_lock, flags);
 376         if (timeout == 0x80)
 377                 snd_printk("mce_down [0x%lx]: serious init problem - codec still busy\n", chip->port);
 378         if ((timeout & CS4231_MCE) == 0 ||
 379             !(chip->hardware & (CS4231_HW_CS4231_MASK | CS4231_HW_CS4232_MASK))) {
 380                 return;
 381         }
 382         snd_cs4231_busy_wait(chip);
 383
 384         /* calibration process */
 385
 386         for (timeout = 500; timeout > 0 && (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0; timeout--)
 387                 udelay(10);
 388         if ((snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0) {
 389                 snd_printd("cs4231_mce_down - auto calibration time out (1)\n");
 390                 return;
 391         }
 392 #if 0
 393         printk("(2) timeout = %i, jiffies = %li\n", timeout, jiffies);
 394 #endif
 395         timeout = HZ / 4 / 2;
 396         time = 2;
 397         while (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) {
 398                 set_current_state(TASK_INTERRUPTIBLE);
 399                 time = schedule_timeout(time);
 400                 if (time > 0)
 401                         continue;
 402                 time = 2;
 403                 if (--timeout < 0) {
 404                         snd_printk("mce_down - auto calibration time out (2)\n");
 405                         return;
 406                 }
 407         }
 408 #if 0
 409         printk("(3) jiffies = %li\n", jiffies);
 410 #endif
 411         timeout = HZ / 10 / 2;
 412         time = 2;
 413         while (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT) {
 414                 set_current_state(TASK_INTERRUPTIBLE);
 415                 time = schedule_timeout(time);
 416                 if (time > 0)
 417                         continue;
 418                 time = 2;
 419                 if (--timeout < 0) {
 420                         snd_printk(KERN_ERR "mce_down - auto calibration time out (3)\n");
 421                         return;
 422                 }
 423         }
 424 #if 0
 425         printk("(4) jiffies = %li\n", jiffies);
 426         snd_printk("mce_down - exit = 0x%x\n", cs4231_inb(chip, CS4231P(REGSEL)));
 427 #endif
 428 }
 429
 430 static unsigned int snd_cs4231_get_count(unsigned char format, unsigned int size)
 431 {
 432         switch (format & 0xe0) {
 433         case CS4231_LINEAR_16:
 434         case CS4231_LINEAR_16_BIG:
 435                 size >>= 1;
 436                 break;
 437         case CS4231_ADPCM_16:
 438                 return size >> 2;
 439         }
 440         if (format & CS4231_STEREO)
 441                 size >>= 1;
 442         return size;
 443 }
 444
 445 static int snd_cs4231_trigger(snd_pcm_substream_t *substream,
 446                               int cmd)
 447 {
 448         cs4231_t *chip = snd_pcm_substream_chip(substream);
 449         int result = 0;
 450         unsigned int what;
 451         struct list_head *pos;
 452         snd_pcm_substream_t *s;
 453         int do_start;
 454
 455 #if 0
 456         printk("codec trigger!!! - what = %i, enable = %i, status = 0x%x\n", what, enable, cs4231_inb(chip, CS4231P(STATUS)));
 457 #endif
 458
 459         switch (cmd) {
 460         case SNDRV_PCM_TRIGGER_START:
 461         case SNDRV_PCM_TRIGGER_RESUME:
 462                 do_start = 1; break;
 463         case SNDRV_PCM_TRIGGER_STOP:
 464         case SNDRV_PCM_TRIGGER_SUSPEND:
 465                 do_start = 0; break;
 466         default:
 467                 return -EINVAL;
 468         }
 469
 470         what = 0;
 471         snd_pcm_group_for_each(pos, substream) {
 472                 s = snd_pcm_group_substream_entry(pos);
 473                 if (s == chip->playback_substream) {
 474                         what |= CS4231_PLAYBACK_ENABLE;
 475                         snd_pcm_trigger_done(s, substream);
 476                 } else if (s == chip->capture_substream) {
 477                         what |= CS4231_RECORD_ENABLE;
 478                         snd_pcm_trigger_done(s, substream);
 479                 }
 480         }
 481         spin_lock(&chip->reg_lock);
 482         if (do_start) {
 483                 chip->image[CS4231_IFACE_CTRL] |= what;
 484                 if (chip->trigger)
 485                         chip->trigger(chip, what, 1);
 486         } else {
 487                 chip->image[CS4231_IFACE_CTRL] &= ~what;
 488                 if (chip->trigger)
 489                         chip->trigger(chip, what, 0);
 490         }
 491         snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
 492         spin_unlock(&chip->reg_lock);
 493 #if 0
 494         snd_cs4231_debug(chip);
 495 #endif
 496         return result;
 497 }
 498
 499 /*
 500  *  CODEC I/O
 501  */
 502
 503 static unsigned char snd_cs4231_get_rate(unsigned int rate)
 504 {
 505         int i;
 506
 507         for (i = 0; i < 14; i++)
 508                 if (rate == rates[i])
 509                         return freq_bits[i];
 510         // snd_BUG();
 511         return freq_bits[13];
 512 }
 513
 514 static unsigned char snd_cs4231_get_format(cs4231_t *chip,
 515                                            int format,
 516                                            int channels)
 517 {
 518         unsigned char rformat;
 519
 520         rformat = CS4231_LINEAR_8;
 521         switch (format) {
 522         case SNDRV_PCM_FORMAT_MU_LAW:   rformat = CS4231_ULAW_8; break;
 523         case SNDRV_PCM_FORMAT_A_LAW:    rformat = CS4231_ALAW_8; break;
 524         case SNDRV_PCM_FORMAT_S16_LE:   rformat = CS4231_LINEAR_16; break;
 525         case SNDRV_PCM_FORMAT_S16_BE:   rformat = CS4231_LINEAR_16_BIG; break;
 526         case SNDRV_PCM_FORMAT_IMA_ADPCM:        rformat = CS4231_ADPCM_16; break;
 527         }
 528         if (channels > 1)
 529                 rformat |= CS4231_STEREO;
 530 #if 0
 531         snd_printk("get_format: 0x%x (mode=0x%x)\n", format, mode);
 532 #endif
 533         return rformat;
 534 }
 535
 536 static void snd_cs4231_calibrate_mute(cs4231_t *chip, int mute)
 537 {
 538         unsigned long flags;
 539
 540         mute = mute ? 1 : 0;
 541         spin_lock_irqsave(&chip->reg_lock, flags);
 542         if (chip->calibrate_mute == mute) {
 543                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 544                 return;
 545         }
 546         if (!mute) {
 547                 snd_cs4231_dout(chip, CS4231_LEFT_INPUT, chip->image[CS4231_LEFT_INPUT]);
 548                 snd_cs4231_dout(chip, CS4231_RIGHT_INPUT, chip->image[CS4231_RIGHT_INPUT]);
 549                 snd_cs4231_dout(chip, CS4231_LOOPBACK, chip->image[CS4231_LOOPBACK]);
 550         }
 551         snd_cs4231_dout(chip, CS4231_AUX1_LEFT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX1_LEFT_INPUT]);
 552         snd_cs4231_dout(chip, CS4231_AUX1_RIGHT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX1_RIGHT_INPUT]);
 553         snd_cs4231_dout(chip, CS4231_AUX2_LEFT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX2_LEFT_INPUT]);
 554         snd_cs4231_dout(chip, CS4231_AUX2_RIGHT_INPUT, mute ? 0x80 : chip->image[CS4231_AUX2_RIGHT_INPUT]);
 555         snd_cs4231_dout(chip, CS4231_LEFT_OUTPUT, mute ? 0x80 : chip->image[CS4231_LEFT_OUTPUT]);
 556         snd_cs4231_dout(chip, CS4231_RIGHT_OUTPUT, mute ? 0x80 : chip->image[CS4231_RIGHT_OUTPUT]);
 557         snd_cs4231_dout(chip, CS4231_LEFT_LINE_IN, mute ? 0x80 : chip->image[CS4231_LEFT_LINE_IN]);
 558         snd_cs4231_dout(chip, CS4231_RIGHT_LINE_IN, mute ? 0x80 : chip->image[CS4231_RIGHT_LINE_IN]);
 559         snd_cs4231_dout(chip, CS4231_MONO_CTRL, mute ? 0xc0 : chip->image[CS4231_MONO_CTRL]);
 560         if (chip->hardware == CS4231_HW_INTERWAVE) {
 561                 snd_cs4231_dout(chip, CS4231_LEFT_MIC_INPUT, mute ? 0x80 : chip->image[CS4231_LEFT_MIC_INPUT]);
 562                 snd_cs4231_dout(chip, CS4231_RIGHT_MIC_INPUT, mute ? 0x80 : chip->image[CS4231_RIGHT_MIC_INPUT]);
 563                 snd_cs4231_dout(chip, CS4231_LINE_LEFT_OUTPUT, mute ? 0x80 : chip->image[CS4231_LINE_LEFT_OUTPUT]);
 564                 snd_cs4231_dout(chip, CS4231_LINE_RIGHT_OUTPUT, mute ? 0x80 : chip->image[CS4231_LINE_RIGHT_OUTPUT]);
 565         }
 566         chip->calibrate_mute = mute;
 567         spin_unlock_irqrestore(&chip->reg_lock, flags);
 568 }
 569
 570 static void snd_cs4231_playback_format(cs4231_t *chip,
 571                                        snd_pcm_hw_params_t *params,
 572                                        unsigned char pdfr)
 573 {
 574         unsigned long flags;
 575         int full_calib = 1;
 576
 577         down(&chip->mce_mutex);
 578         snd_cs4231_calibrate_mute(chip, 1);
 579         if (chip->hardware == CS4231_HW_CS4231A ||
 580             (chip->hardware & CS4231_HW_CS4232_MASK)) {
 581                 spin_lock_irqsave(&chip->reg_lock, flags);
 582                 if ((chip->image[CS4231_PLAYBK_FORMAT] & 0x0f) == (pdfr & 0x0f)) {      /* rate is same? */
 583                         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | 0x10);
 584                         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT] = pdfr);
 585                         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] &= ~0x10);
 586                         udelay(100); /* Fixes audible clicks at least on GUS MAX */
 587                         full_calib = 0;
 588                 }
 589                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 590         }
 591         if (full_calib) {
 592                 snd_cs4231_mce_up(chip);
 593                 spin_lock_irqsave(&chip->reg_lock, flags);
 594                 if (chip->hardware != CS4231_HW_INTERWAVE && !chip->single_dma) {
 595                         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
 596                                         (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) ?
 597                                         (pdfr & 0xf0) | (chip->image[CS4231_REC_FORMAT] & 0x0f) :
 598                                         pdfr);
 599                 } else {
 600                         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT] = pdfr);
 601                 }
 602                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 603                 snd_cs4231_mce_down(chip);
 604         }
 605         snd_cs4231_calibrate_mute(chip, 0);
 606         up(&chip->mce_mutex);
 607 }
 608
 609 static void snd_cs4231_capture_format(cs4231_t *chip,
 610                                       snd_pcm_hw_params_t *params,
 611                                       unsigned char cdfr)
 612 {
 613         unsigned long flags;
 614         int full_calib = 1;
 615
 616         down(&chip->mce_mutex);
 617         snd_cs4231_calibrate_mute(chip, 1);
 618         if (chip->hardware == CS4231_HW_CS4231A ||
 619             (chip->hardware & CS4231_HW_CS4232_MASK)) {
 620                 spin_lock_irqsave(&chip->reg_lock, flags);
 621                 if ((chip->image[CS4231_PLAYBK_FORMAT] & 0x0f) == (cdfr & 0x0f) ||      /* rate is same? */
 622                     (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
 623                         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | 0x20);
 624                         snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT] = cdfr);
 625                         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] &= ~0x20);
 626                         full_calib = 0;
 627                 }
 628                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 629         }
 630         if (full_calib) {
 631                 snd_cs4231_mce_up(chip);
 632                 spin_lock_irqsave(&chip->reg_lock, flags);
 633                 if (chip->hardware != CS4231_HW_INTERWAVE) {
 634                         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
 635                                 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
 636                                                ((chip->single_dma ? cdfr : chip->image[CS4231_PLAYBK_FORMAT]) & 0xf0) |
 637                                                (cdfr & 0x0f));
 638                                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 639                                 snd_cs4231_mce_down(chip);
 640                                 snd_cs4231_mce_up(chip);
 641                                 spin_lock_irqsave(&chip->reg_lock, flags);
 642                         }
 643                 }
 644                 snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr);
 645                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 646                 snd_cs4231_mce_down(chip);
 647         }
 648         snd_cs4231_calibrate_mute(chip, 0);
 649         up(&chip->mce_mutex);
 650 }
 651
 652 /*
 653  *  Timer interface
 654  */
 655
 656 static unsigned long snd_cs4231_timer_resolution(snd_timer_t * timer)
 657 {
 658         cs4231_t *chip = snd_timer_chip(timer);
 659         if (chip->hardware & CS4231_HW_CS4236B_MASK)
 660                 return 14467;
 661         else
 662                 return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
 663 }
 664
 665 static int snd_cs4231_timer_start(snd_timer_t * timer)
 666 {
 667         unsigned long flags;
 668         unsigned int ticks;
 669         cs4231_t *chip = snd_timer_chip(timer);
 670         spin_lock_irqsave(&chip->reg_lock, flags);
 671         ticks = timer->sticks;
 672         if ((chip->image[CS4231_ALT_FEATURE_1] & CS4231_TIMER_ENABLE) == 0 ||
 673             (unsigned char)(ticks >> 8) != chip->image[CS4231_TIMER_HIGH] ||
 674             (unsigned char)ticks != chip->image[CS4231_TIMER_LOW]) {
 675                 snd_cs4231_out(chip, CS4231_TIMER_HIGH, chip->image[CS4231_TIMER_HIGH] = (unsigned char) (ticks >> 8));
 676                 snd_cs4231_out(chip, CS4231_TIMER_LOW, chip->image[CS4231_TIMER_LOW] = (unsigned char) ticks);
 677                 snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | CS4231_TIMER_ENABLE);
 678         }
 679         spin_unlock_irqrestore(&chip->reg_lock, flags);
 680         return 0;
 681 }
 682
 683 static int snd_cs4231_timer_stop(snd_timer_t * timer)
 684 {
 685         unsigned long flags;
 686         cs4231_t *chip = snd_timer_chip(timer);
 687         spin_lock_irqsave(&chip->reg_lock, flags);
 688         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE);
 689         spin_unlock_irqrestore(&chip->reg_lock, flags);
 690         return 0;
 691 }
 692
 693 static void snd_cs4231_init(cs4231_t *chip)
 694 {
 695         unsigned long flags;
 696
 697         snd_cs4231_mce_down(chip);
 698
 699 #ifdef SNDRV_DEBUGq_MCE
 700         snd_printk("init: (1)\n");
 701 #endif
 702         snd_cs4231_mce_up(chip);
 703         spin_lock_irqsave(&chip->reg_lock, flags);
 704         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
 705                              CS4231_RECORD_ENABLE | CS4231_RECORD_PIO |
 706                              CS4231_CALIB_MODE);
 707         chip->image[CS4231_IFACE_CTRL] |= CS4231_AUTOCALIB;
 708         snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
 709         spin_unlock_irqrestore(&chip->reg_lock, flags);
 710         snd_cs4231_mce_down(chip);
 711
 712 #ifdef SNDRV_DEBUG_MCE
 713         snd_printk("init: (2)\n");
 714 #endif
 715
 716         snd_cs4231_mce_up(chip);
 717         spin_lock_irqsave(&chip->reg_lock, flags);
 718         snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1]);
 719         spin_unlock_irqrestore(&chip->reg_lock, flags);
 720         snd_cs4231_mce_down(chip);
 721
 722 #ifdef SNDRV_DEBUG_MCE
 723         snd_printk("init: (3) - afei = 0x%x\n", chip->image[CS4231_ALT_FEATURE_1]);
 724 #endif
 725
 726         spin_lock_irqsave(&chip->reg_lock, flags);
 727         snd_cs4231_out(chip, CS4231_ALT_FEATURE_2, chip->image[CS4231_ALT_FEATURE_2]);
 728         spin_unlock_irqrestore(&chip->reg_lock, flags);
 729
 730         snd_cs4231_mce_up(chip);
 731         spin_lock_irqsave(&chip->reg_lock, flags);
 732         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT]);
 733         spin_unlock_irqrestore(&chip->reg_lock, flags);
 734         snd_cs4231_mce_down(chip);
 735
 736 #ifdef SNDRV_DEBUG_MCE
 737         snd_printk("init: (4)\n");
 738 #endif
 739
 740         snd_cs4231_mce_up(chip);
 741         spin_lock_irqsave(&chip->reg_lock, flags);
 742         snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT]);
 743         spin_unlock_irqrestore(&chip->reg_lock, flags);
 744         snd_cs4231_mce_down(chip);
 745
 746 #ifdef SNDRV_DEBUG_MCE
 747         snd_printk("init: (5)\n");
 748 #endif
 749 }
 750
 751 static int snd_cs4231_open(cs4231_t *chip, unsigned int mode)
 752 {
 753         unsigned long flags;
 754
 755         down(&chip->open_mutex);
 756         if ((chip->mode & mode) ||
 757             ((chip->mode & CS4231_MODE_OPEN) && chip->single_dma)) {
 758                 up(&chip->open_mutex);
 759                 return -EAGAIN;
 760         }
 761         if (chip->mode & CS4231_MODE_OPEN) {
 762                 chip->mode |= mode;
 763                 up(&chip->open_mutex);
 764                 return 0;
 765         }
 766         /* ok. now enable and ack CODEC IRQ */
 767         spin_lock_irqsave(&chip->reg_lock, flags);
 768         snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
 769                        CS4231_RECORD_IRQ |
 770                        CS4231_TIMER_IRQ);
 771         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
 772         cs4231_outb(chip, CS4231P(STATUS), 0);  /* clear IRQ */
 773         cs4231_outb(chip, CS4231P(STATUS), 0);  /* clear IRQ */
 774         chip->image[CS4231_PIN_CTRL] |= CS4231_IRQ_ENABLE;
 775         snd_cs4231_out(chip, CS4231_PIN_CTRL, chip->image[CS4231_PIN_CTRL]);
 776         snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
 777                        CS4231_RECORD_IRQ |
 778                        CS4231_TIMER_IRQ);
 779         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
 780         spin_unlock_irqrestore(&chip->reg_lock, flags);
 781
 782         chip->mode = mode;
 783         up(&chip->open_mutex);
 784         return 0;
 785 }
 786
 787 static void snd_cs4231_close(cs4231_t *chip, unsigned int mode)
 788 {
 789         unsigned long flags;
 790
 791         down(&chip->open_mutex);
 792         chip->mode &= ~mode;
 793         if (chip->mode & CS4231_MODE_OPEN) {
 794                 up(&chip->open_mutex);
 795                 return;
 796         }
 797         snd_cs4231_calibrate_mute(chip, 1);
 798
 799         /* disable IRQ */
 800         spin_lock_irqsave(&chip->reg_lock, flags);
 801         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
 802         cs4231_outb(chip, CS4231P(STATUS), 0);  /* clear IRQ */
 803         cs4231_outb(chip, CS4231P(STATUS), 0);  /* clear IRQ */
 804         chip->image[CS4231_PIN_CTRL] &= ~CS4231_IRQ_ENABLE;
 805         snd_cs4231_out(chip, CS4231_PIN_CTRL, chip->image[CS4231_PIN_CTRL]);
 806
 807         /* now disable record & playback */
 808
 809         if (chip->image[CS4231_IFACE_CTRL] & (CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
 810                                                CS4231_RECORD_ENABLE | CS4231_RECORD_PIO)) {
 811                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 812                 snd_cs4231_mce_up(chip);
 813                 spin_lock_irqsave(&chip->reg_lock, flags);
 814                 chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
 815                                                      CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
 816                 snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
 817                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 818                 snd_cs4231_mce_down(chip);
 819                 spin_lock_irqsave(&chip->reg_lock, flags);
 820         }
 821
 822         /* clear IRQ again */
 823         snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
 824         cs4231_outb(chip, CS4231P(STATUS), 0);  /* clear IRQ */
 825         cs4231_outb(chip, CS4231P(STATUS), 0);  /* clear IRQ */
 826         spin_unlock_irqrestore(&chip->reg_lock, flags);
 827
 828         snd_cs4231_calibrate_mute(chip, 0);
 829
 830         chip->mode = 0;
 831         up(&chip->open_mutex);
 832 }
 833
 834 /*
 835  *  timer open/close
 836  */
 837
 838 static int snd_cs4231_timer_open(snd_timer_t * timer)
 839 {
 840         cs4231_t *chip = snd_timer_chip(timer);
 841         snd_cs4231_open(chip, CS4231_MODE_TIMER);
 842         return 0;
 843 }
 844
 845 static int snd_cs4231_timer_close(snd_timer_t * timer)
 846 {
 847         cs4231_t *chip = snd_timer_chip(timer);
 848         snd_cs4231_close(chip, CS4231_MODE_TIMER);
 849         return 0;
 850 }
 851
 852 static struct _snd_timer_hardware snd_cs4231_timer_table =
 853 {
 854         .flags =        SNDRV_TIMER_HW_AUTO,
 855         .resolution =   9945,
 856         .ticks =        65535,
 857         .open =         snd_cs4231_timer_open,
 858         .close =        snd_cs4231_timer_close,
 859         .c_resolution = snd_cs4231_timer_resolution,
 860         .start =        snd_cs4231_timer_start,
 861         .stop =         snd_cs4231_timer_stop,
 862 };
 863
 864 /*
 865  *  ok.. exported functions..
 866  */
 867
 868 static int snd_cs4231_playback_hw_params(snd_pcm_substream_t * substream,
 869                                          snd_pcm_hw_params_t * hw_params)
 870 {
 871         cs4231_t *chip = snd_pcm_substream_chip(substream);
 872         unsigned char new_pdfr;
 873         int err;
 874
 875         if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
 876                 return err;
 877         new_pdfr = snd_cs4231_get_format(chip, params_format(hw_params), params_channels(hw_params)) |
 878                    snd_cs4231_get_rate(params_rate(hw_params));
 879         chip->set_playback_format(chip, hw_params, new_pdfr);
 880         return 0;
 881 }
 882
 883 static int snd_cs4231_playback_hw_free(snd_pcm_substream_t * substream)
 884 {
 885         return snd_pcm_lib_free_pages(substream);
 886 }
 887
 888 #ifdef LEGACY_SUPPORT
 889 static int snd_cs4231_playback_prepare(snd_pcm_substream_t * substream)
 890 {
 891         cs4231_t *chip = snd_pcm_substream_chip(substream);
 892         snd_pcm_runtime_t *runtime = substream->runtime;
 893         unsigned long flags;
 894         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 895         unsigned int count = snd_pcm_lib_period_bytes(substream);
 896
 897         spin_lock_irqsave(&chip->reg_lock, flags);
 898         chip->p_dma_size = size;
 899         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO);
 900         snd_dma_program(chip->dma1, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);
 901         count = snd_cs4231_get_count(chip->image[CS4231_PLAYBK_FORMAT], count) - 1;
 902         snd_cs4231_out(chip, CS4231_PLY_LWR_CNT, (unsigned char) count);
 903         snd_cs4231_out(chip, CS4231_PLY_UPR_CNT, (unsigned char) (count >> 8));
 904         spin_unlock_irqrestore(&chip->reg_lock, flags);
 905 #if 0
 906         snd_cs4231_debug(chip);
 907 #endif
 908         return 0;
 909 }
 910 #endif /* LEGACY_SUPPORT */
 911
 912 static int snd_cs4231_capture_hw_params(snd_pcm_substream_t * substream,
 913                                         snd_pcm_hw_params_t * hw_params)
 914 {
 915         cs4231_t *chip = snd_pcm_substream_chip(substream);
 916         unsigned char new_cdfr;
 917         int err;
 918
 919         if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
 920                 return err;
 921         new_cdfr = snd_cs4231_get_format(chip, params_format(hw_params), params_channels(hw_params)) |
 922                    snd_cs4231_get_rate(params_rate(hw_params));
 923         chip->set_capture_format(chip, hw_params, new_cdfr);
 924         return 0;
 925 }
 926
 927 static int snd_cs4231_capture_hw_free(snd_pcm_substream_t * substream)
 928 {
 929         return snd_pcm_lib_free_pages(substream);
 930 }
 931
 932 #ifdef LEGACY_SUPPORT
 933 static int snd_cs4231_capture_prepare(snd_pcm_substream_t * substream)
 934 {
 935         cs4231_t *chip = snd_pcm_substream_chip(substream);
 936         snd_pcm_runtime_t *runtime = substream->runtime;
 937         unsigned long flags;
 938         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 939         unsigned int count = snd_pcm_lib_period_bytes(substream);
 940
 941         spin_lock_irqsave(&chip->reg_lock, flags);
 942         chip->c_dma_size = size;
 943         chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
 944         snd_dma_program(chip->dma2, runtime->dma_addr, size, DMA_MODE_READ | DMA_AUTOINIT);
 945         count = snd_cs4231_get_count(chip->image[CS4231_REC_FORMAT], count) - 1;
 946         if (chip->single_dma && chip->hardware != CS4231_HW_INTERWAVE) {
 947                 snd_cs4231_out(chip, CS4231_PLY_LWR_CNT, (unsigned char) count);
 948                 snd_cs4231_out(chip, CS4231_PLY_UPR_CNT, (unsigned char) (count >> 8));
 949         } else {
 950                 snd_cs4231_out(chip, CS4231_REC_LWR_CNT, (unsigned char) count);
 951                 snd_cs4231_out(chip, CS4231_REC_UPR_CNT, (unsigned char) (count >> 8));
 952         }
 953         spin_unlock_irqrestore(&chip->reg_lock, flags);
 954         return 0;
 955 }
 956 #endif
 957
 958 static void snd_cs4231_overrange(cs4231_t *chip)
 959 {
 960         unsigned long flags;
 961         unsigned char res;
 962
 963         spin_lock_irqsave(&chip->reg_lock, flags);
 964         res = snd_cs4231_in(chip, CS4231_TEST_INIT);
 965         spin_unlock_irqrestore(&chip->reg_lock, flags);
 966         if (res & (0x08 | 0x02))        /* detect overrange only above 0dB; may be user selectable? */
 967                 chip->capture_substream->runtime->overrange++;
 968 }
 969
 970 irqreturn_t snd_cs4231_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 971 {
 972         cs4231_t *chip = snd_magic_cast(cs4231_t, dev_id, return IRQ_NONE);
 973         unsigned char status;
 974
 975         status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);
 976         if (status & CS4231_TIMER_IRQ) {
 977                 if (chip->timer)
 978                         snd_timer_interrupt(chip->timer, chip->timer->sticks);
 979         }
 980         if (chip->single_dma && chip->hardware != CS4231_HW_INTERWAVE) {
 981                 if (status & CS4231_PLAYBACK_IRQ) {
 982                         if (chip->mode & CS4231_MODE_PLAY) {
 983                                 if (chip->playback_substream)
 984                                         snd_pcm_period_elapsed(chip->playback_substream);
 985                         }
 986                         if (chip->mode & CS4231_MODE_RECORD) {
 987                                 if (chip->capture_substream) {
 988                                         snd_cs4231_overrange(chip);
 989                                         snd_pcm_period_elapsed(chip->capture_substream);
 990                                 }
 991                         }
 992                 }
 993         } else {
 994                 if (status & CS4231_PLAYBACK_IRQ) {
 995                         if (chip->playback_substream)
 996                                 snd_pcm_period_elapsed(chip->playback_substream);
 997                 }
 998                 if (status & CS4231_RECORD_IRQ) {
 999                         if (chip->capture_substream) {
1000                                 snd_cs4231_overrange(chip);
1001                                 snd_pcm_period_elapsed(chip->capture_substream);
1002                         }
1003                 }
1004         }
1005
1006         spin_lock(&chip->reg_lock);
1007         snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
1008         spin_unlock(&chip->reg_lock);
1009         return IRQ_HANDLED;
1010 }
1011
1012 #ifdef LEGACY_SUPPORT
1013 static snd_pcm_uframes_t snd_cs4231_playback_pointer(snd_pcm_substream_t * substream)
1014 {
1015         cs4231_t *chip = snd_pcm_substream_chip(substream);
1016         size_t ptr;
1017
1018         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
1019                 return 0;
1020         ptr = snd_dma_pointer(chip->dma1, chip->p_dma_size);
1021         return bytes_to_frames(substream->runtime, ptr);
1022 }
1023
1024 static snd_pcm_uframes_t snd_cs4231_capture_pointer(snd_pcm_substream_t * substream)
1025 {
1026         cs4231_t *chip = snd_pcm_substream_chip(substream);
1027         size_t ptr;
1028
1029         if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
1030                 return 0;
1031         ptr = snd_dma_pointer(chip->dma2, chip->c_dma_size);
1032         return bytes_to_frames(substream->runtime, ptr);
1033 }
1034 #endif /* LEGACY_SUPPORT */
1035
1036 /*
1037
1038  */
1039
1040 int snd_cs4231_probe(cs4231_t *chip)
1041 {
1042         unsigned long flags;
1043         int i, id, rev;
1044         unsigned char *ptr;
1045         unsigned int hw;
1046
1047 #if 0
1048         snd_cs4231_debug(chip);
1049 #endif
1050         id = 0;
1051         for (i = 0; i < 50; i++) {
1052                 mb();
1053                 if (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
1054                         udelay(2000);
1055                 else {
1056                         spin_lock_irqsave(&chip->reg_lock, flags);
1057                         snd_cs4231_out(chip, CS4231_MISC_INFO, CS4231_MODE2);
1058                         id = snd_cs4231_in(chip, CS4231_MISC_INFO) & 0x0f;
1059                         spin_unlock_irqrestore(&chip->reg_lock, flags);
1060                         if (id == 0x0a)
1061                                 break;  /* this is valid value */
1062                 }
1063         }
1064         snd_printdd("cs4231: port = 0x%lx, id = 0x%x\n", chip->port, id);
1065         if (id != 0x0a)
1066                 return -ENODEV; /* no valid device found */
1067
1068         if (((hw = chip->hardware) & CS4231_HW_TYPE_MASK) == CS4231_HW_DETECT) {
1069                 rev = snd_cs4231_in(chip, CS4231_VERSION) & 0xe7;
1070                 snd_printdd("CS4231: VERSION (I25) = 0x%x\n", rev);
1071                 if (rev == 0x80) {
1072                         unsigned char tmp = snd_cs4231_in(chip, 23);
1073                         snd_cs4231_out(chip, 23, ~tmp);
1074                         if (snd_cs4231_in(chip, 23) != tmp)
1075                                 chip->hardware = CS4231_HW_AD1845;
1076                         else
1077                                 chip->hardware = CS4231_HW_CS4231;
1078                 } else if (rev == 0xa0) {
1079                         chip->hardware = CS4231_HW_CS4231A;
1080                 } else if (rev == 0xa2) {
1081                         chip->hardware = CS4231_HW_CS4232;
1082                 } else if (rev == 0xb2) {
1083                         chip->hardware = CS4231_HW_CS4232A;
1084                 } else if (rev == 0x83) {
1085                         chip->hardware = CS4231_HW_CS4236;
1086                 } else if (rev == 0x03) {
1087                         chip->hardware = CS4231_HW_CS4236B;
1088                 } else {
1089                         snd_printk("unknown CS chip with version 0x%x\n", rev);
1090                         return -ENODEV;         /* unknown CS4231 chip? */
1091                 }
1092         }
1093         spin_lock_irqsave(&chip->reg_lock, flags);
1094         cs4231_inb(chip, CS4231P(STATUS));      /* clear any pendings IRQ */
1095         cs4231_outb(chip, CS4231P(STATUS), 0);
1096         mb();
1097         spin_unlock_irqrestore(&chip->reg_lock, flags);
1098
1099         chip->image[CS4231_MISC_INFO] = CS4231_MODE2;
1100         switch (chip->hardware) {
1101         case CS4231_HW_INTERWAVE:
1102                 chip->image[CS4231_MISC_INFO] = CS4231_IW_MODE3;
1103                 break;
1104         case CS4231_HW_CS4235:
1105         case CS4231_HW_CS4236B:
1106         case CS4231_HW_CS4237B:
1107         case CS4231_HW_CS4238B:
1108         case CS4231_HW_CS4239:
1109                 if (hw == CS4231_HW_DETECT3)
1110                         chip->image[CS4231_MISC_INFO] = CS4231_4236_MODE3;
1111                 else
1112                         chip->hardware = CS4231_HW_CS4236;
1113                 break;
1114         }
1115
1116         chip->image[CS4231_IFACE_CTRL] =
1117             (chip->image[CS4231_IFACE_CTRL] & ~CS4231_SINGLE_DMA) |
1118             (chip->single_dma ? CS4231_SINGLE_DMA : 0);
1119         chip->image[CS4231_ALT_FEATURE_1] = 0x80;
1120         chip->image[CS4231_ALT_FEATURE_2] = chip->hardware == CS4231_HW_INTERWAVE ? 0xc2 : 0x01;
1121         ptr = (unsigned char *) &chip->image;
1122         snd_cs4231_mce_down(chip);
1123         spin_lock_irqsave(&chip->reg_lock, flags);
1124         for (i = 0; i < 32; i++)        /* ok.. fill all CS4231 registers */
1125                 snd_cs4231_out(chip, i, *ptr++);
1126         spin_unlock_irqrestore(&chip->reg_lock, flags);
1127         snd_cs4231_mce_up(chip);
1128         snd_cs4231_mce_down(chip);
1129
1130         mdelay(2);
1131
1132         /* ok.. try check hardware version for CS4236+ chips */
1133         if ((hw & CS4231_HW_TYPE_MASK) == CS4231_HW_DETECT) {
1134                 if (chip->hardware == CS4231_HW_CS4236B) {
1135                         rev = snd_cs4236_ext_in(chip, CS4236_VERSION);
1136                         snd_cs4236_ext_out(chip, CS4236_VERSION, 0xff);
1137                         id = snd_cs4236_ext_in(chip, CS4236_VERSION);
1138                         snd_cs4236_ext_out(chip, CS4236_VERSION, rev);
1139                         snd_printdd("CS4231: ext version; rev = 0x%x, id = 0x%x\n", rev, id);
1140                         if ((id & 0x1f) == 0x1d) {      /* CS4235 */
1141                                 chip->hardware = CS4231_HW_CS4235;
1142                                 switch (id >> 5) {
1143                                 case 4:
1144                                 case 5:
1145                                 case 6:
1146                                         break;
1147                                 default:
1148                                         snd_printk("unknown CS4235 chip (enhanced version = 0x%x)\n", id);
1149                                 }
1150                         } else if ((id & 0x1f) == 0x0b) {       /* CS4236/B */
1151                                 switch (id >> 5) {
1152                                 case 4:
1153                                 case 5:
1154                                 case 6:
1155                                 case 7:
1156                                         chip->hardware = CS4231_HW_CS4236B;
1157                                         break;
1158                                 default:
1159                                         snd_printk("unknown CS4236 chip (enhanced version = 0x%x)\n", id);
1160                                 }
1161                         } else if ((id & 0x1f) == 0x08) {       /* CS4237B */
1162                                 chip->hardware = CS4231_HW_CS4237B;
1163                                 switch (id >> 5) {
1164                                 case 4:
1165                                 case 5:
1166                                 case 6:
1167                                 case 7:
1168                                         break;
1169                                 default:
1170                                         snd_printk("unknown CS4237B chip (enhanced version = 0x%x)\n", id);
1171                                 }
1172                         } else if ((id & 0x1f) == 0x09) {       /* CS4238B */
1173                                 chip->hardware = CS4231_HW_CS4238B;
1174                                 switch (id >> 5) {
1175                                 case 5:
1176                                 case 6:
1177                                 case 7:
1178                                         break;
1179                                 default:
1180                                         snd_printk("unknown CS4238B chip (enhanced version = 0x%x)\n", id);
1181                                 }
1182                         } else if ((id & 0x1f) == 0x1e) {       /* CS4239 */
1183                                 chip->hardware = CS4231_HW_CS4239;
1184                                 switch (id >> 5) {
1185                                 case 4:
1186                                 case 5:
1187                                 case 6:
1188                                         break;
1189                                 default:
1190                                         snd_printk("unknown CS4239 chip (enhanced version = 0x%x)\n", id);
1191                                 }
1192                         } else {
1193                                 snd_printk("unknown CS4236/CS423xB chip (enhanced version = 0x%x)\n", id);
1194                         }
1195                 }
1196         }
1197         return 0;               /* all things are ok.. */
1198 }
1199
1200 /*
1201
1202  */
1203
1204 static snd_pcm_hardware_t snd_cs4231_playback =
1205 {
1206         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1207                                  SNDRV_PCM_INFO_MMAP_VALID |
1208                                  SNDRV_PCM_INFO_RESUME |
1209                                  SNDRV_PCM_INFO_SYNC_START),
1210         .formats =              (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW | SNDRV_PCM_FMTBIT_IMA_ADPCM |
1211                                  SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE),
1212         .rates =                SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
1213         .rate_min =             5510,
1214         .rate_max =             48000,
1215         .channels_min =         1,
1216         .channels_max =         2,
1217         .buffer_bytes_max =     (128*1024),
1218         .period_bytes_min =     64,
1219         .period_bytes_max =     (128*1024),
1220         .periods_min =          1,
1221         .periods_max =          1024,
1222         .fifo_size =            0,
1223 };
1224
1225 static snd_pcm_hardware_t snd_cs4231_capture =
1226 {
1227         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1228                                  SNDRV_PCM_INFO_MMAP_VALID |
1229                                  SNDRV_PCM_INFO_RESUME |
1230                                  SNDRV_PCM_INFO_SYNC_START),
1231         .formats =              (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW | SNDRV_PCM_FMTBIT_IMA_ADPCM |
1232                                  SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE),
1233         .rates =                SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
1234         .rate_min =             5510,
1235         .rate_max =             48000,
1236         .channels_min =         1,
1237         .channels_max =         2,
1238         .buffer_bytes_max =     (128*1024),
1239         .period_bytes_min =     64,
1240         .period_bytes_max =     (128*1024),
1241         .periods_min =          1,
1242         .periods_max =          1024,
1243         .fifo_size =            0,
1244 };
1245
1246 /*
1247
1248  */
1249
1250 static int snd_cs4231_playback_open(snd_pcm_substream_t * substream)
1251 {
1252         cs4231_t *chip = snd_pcm_substream_chip(substream);
1253         snd_pcm_runtime_t *runtime = substream->runtime;
1254         int err;
1255
1256         runtime->hw = snd_cs4231_playback;
1257
1258         /* hardware bug in InterWave chipset */
1259         if (chip->hardware == CS4231_HW_INTERWAVE && chip->dma1 > 3)
1260                 runtime->hw.formats &= ~SNDRV_PCM_FMTBIT_MU_LAW;
1261
1262         /* hardware limitation of cheap chips */
1263         if (chip->hardware == CS4231_HW_CS4235 ||
1264             chip->hardware == CS4231_HW_CS4239)
1265                 runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE;
1266
1267 #ifdef LEGACY_SUPPORT
1268         snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.buffer_bytes_max);
1269         snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.period_bytes_max);
1270
1271         if (chip->claim_dma) {
1272                 if ((err = chip->claim_dma(chip, chip->dma_private_data, chip->dma1)) < 0)
1273                         return err;
1274         }
1275 #endif
1276
1277         if ((err = snd_cs4231_open(chip, CS4231_MODE_PLAY)) < 0) {
1278 #ifdef LEGACY_SUPPORT
1279                 if (chip->release_dma)
1280                         chip->release_dma(chip, chip->dma_private_data, chip->dma1);
1281 #endif
1282                 snd_free_pages(runtime->dma_area, runtime->dma_bytes);
1283                 return err;
1284         }
1285         chip->playback_substream = substream;
1286 #if defined(SBUS_SUPPORT) || defined(EBUS_SUPPORT)
1287         chip->p_periods_sent = 0;
1288 #endif
1289         snd_pcm_set_sync(substream);
1290         chip->rate_constraint(runtime);
1291         return 0;
1292 }
1293
1294 static int snd_cs4231_capture_open(snd_pcm_substream_t * substream)
1295 {
1296         cs4231_t *chip = snd_pcm_substream_chip(substream);
1297         snd_pcm_runtime_t *runtime = substream->runtime;
1298         int err;
1299
1300         runtime->hw = snd_cs4231_capture;
1301
1302         /* hardware limitation of cheap chips */
1303         if (chip->hardware == CS4231_HW_CS4235 ||
1304             chip->hardware == CS4231_HW_CS4239)
1305                 runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE;
1306
1307 #ifdef LEGACY_SUPPORT
1308         snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.buffer_bytes_max);
1309         snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.period_bytes_max);
1310
1311         if (chip->claim_dma) {
1312                 if ((err = chip->claim_dma(chip, chip->dma_private_data, chip->dma2)) < 0)
1313                         return err;
1314         }
1315 #endif
1316
1317         if ((err = snd_cs4231_open(chip, CS4231_MODE_RECORD)) < 0) {
1318 #ifdef LEGACY_SUPPORT
1319                 if (chip->release_dma)
1320                         chip->release_dma(chip, chip->dma_private_data, chip->dma2);
1321 #endif
1322                 snd_free_pages(runtime->dma_area, runtime->dma_bytes);
1323                 return err;
1324         }
1325         chip->capture_substream = substream;
1326 #if defined(SBUS_SUPPORT) || defined(EBUS_SUPPORT)
1327         chip->c_periods_sent = 0;
1328 #endif
1329         snd_pcm_set_sync(substream);
1330         chip->rate_constraint(runtime);
1331         return 0;
1332 }
1333
1334 static int snd_cs4231_playback_close(snd_pcm_substream_t * substream)
1335 {
1336         cs4231_t *chip = snd_pcm_substream_chip(substream);
1337
1338         chip->playback_substream = NULL;
1339         snd_cs4231_close(chip, CS4231_MODE_PLAY);
1340         return 0;
1341 }
1342
1343 static int snd_cs4231_capture_close(snd_pcm_substream_t * substream)
1344 {
1345         cs4231_t *chip = snd_pcm_substream_chip(substream);
1346
1347         chip->capture_substream = NULL;
1348         snd_cs4231_close(chip, CS4231_MODE_RECORD);
1349         return 0;
1350 }
1351
1352 #ifdef CONFIG_PM
1353
1354 /* lowlevel suspend callback for CS4231 */
1355 static void snd_cs4231_suspend(cs4231_t *chip)
1356 {
1357         int reg;
1358         unsigned long flags;
1359
1360         spin_lock_irqsave(&chip->reg_lock, flags);
1361         for (reg = 0; reg < 32; reg++)
1362                 chip->image[reg] = snd_cs4231_in(chip, reg);
1363         spin_unlock_irqrestore(&chip->reg_lock, flags);
1364 }
1365
1366 /* lowlevel resume callback for CS4231 */
1367 static void snd_cs4231_resume(cs4231_t *chip)
1368 {
1369         int reg;
1370         unsigned long flags;
1371         int timeout;
1372
1373         snd_cs4231_mce_up(chip);
1374         spin_lock_irqsave(&chip->reg_lock, flags);
1375         for (reg = 0; reg < 32; reg++) {
1376                 switch (reg) {
1377                 case CS4231_VERSION:
1378                         break;
1379                 default:
1380                         snd_cs4231_out(chip, reg, chip->image[reg]);
1381                         break;
1382                 }
1383         }
1384         spin_unlock_irqrestore(&chip->reg_lock, flags);
1385 #if 0
1386         snd_cs4231_mce_down(chip);
1387 #else
1388         /* The following is a workaround to avoid freeze after resume on TP600E.
1389            This is the first half of copy of snd_cs4231_mce_down(), but doesn't
1390            include rescheduling.  -- iwai
1391            */
1392         snd_cs4231_busy_wait(chip);
1393         spin_lock_irqsave(&chip->reg_lock, flags);
1394         chip->mce_bit &= ~CS4231_MCE;
1395         timeout = cs4231_inb(chip, CS4231P(REGSEL));
1396         cs4231_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
1397         spin_unlock_irqrestore(&chip->reg_lock, flags);
1398         if (timeout == 0x80)
1399                 snd_printk("down [0x%lx]: serious init problem - codec still busy\n", chip->port);
1400         if ((timeout & CS4231_MCE) == 0 ||
1401             !(chip->hardware & (CS4231_HW_CS4231_MASK | CS4231_HW_CS4232_MASK))) {
1402                 return;
1403         }
1404         snd_cs4231_busy_wait(chip);
1405 #endif
1406 }
1407
1408 static int snd_cs4231_pm_suspend(snd_card_t *card, unsigned int state)
1409 {
1410         cs4231_t *chip = snd_magic_cast(cs4231_t, card->pm_private_data, return -EINVAL);
1411         if (chip->suspend) {
1412                 chip->suspend(chip);
1413                 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1414         }
1415         return 0;
1416 }
1417
1418 static int snd_cs4231_pm_resume(snd_card_t *card, unsigned int state)
1419 {
1420         cs4231_t *chip = snd_magic_cast(cs4231_t, card->pm_private_data, return -EINVAL);
1421         if (chip->resume) {
1422                 chip->resume(chip);
1423                 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1424         }
1425         return 0;
1426 }
1427 #endif /* CONFIG_PM */
1428
1429 #ifdef LEGACY_SUPPORT
1430
1431 static int snd_cs4231_free(cs4231_t *chip)
1432 {
1433         if (chip->res_port) {
1434                 release_resource(chip->res_port);
1435                 kfree_nocheck(chip->res_port);
1436         }
1437         if (chip->res_cport) {
1438                 release_resource(chip->res_cport);
1439                 kfree_nocheck(chip->res_cport);
1440         }
1441         if (chip->irq >= 0) {
1442                 disable_irq(chip->irq);
1443                 if (!(chip->hwshare & CS4231_HWSHARE_IRQ))
1444                         free_irq(chip->irq, (void *) chip);
1445         }
1446         if (!(chip->hwshare & CS4231_HWSHARE_DMA1) && chip->dma1 >= 0) {
1447                 snd_dma_disable(chip->dma1);
1448                 free_dma(chip->dma1);
1449         }
1450         if (!(chip->hwshare & CS4231_HWSHARE_DMA2) && chip->dma2 >= 0 && chip->dma2 != chip->dma1) {
1451                 snd_dma_disable(chip->dma2);
1452                 free_dma(chip->dma2);
1453         }
1454         if (chip->timer)
1455                 snd_device_free(chip->card, chip->timer);
1456         snd_magic_kfree(chip);
1457         return 0;
1458 }
1459
1460 static int snd_cs4231_dev_free(snd_device_t *device)
1461 {
1462         cs4231_t *chip = snd_magic_cast(cs4231_t, device->device_data, return -ENXIO);
1463         return snd_cs4231_free(chip);
1464 }
1465
1466 #endif /* LEGACY_SUPPORT */
1467
1468 const char *snd_cs4231_chip_id(cs4231_t *chip)
1469 {
1470         switch (chip->hardware) {
1471         case CS4231_HW_CS4231:  return "CS4231";
1472         case CS4231_HW_CS4231A: return "CS4231A";
1473         case CS4231_HW_CS4232:  return "CS4232";
1474         case CS4231_HW_CS4232A: return "CS4232A";
1475         case CS4231_HW_CS4235:  return "CS4235";
1476         case CS4231_HW_CS4236:  return "CS4236";
1477         case CS4231_HW_CS4236B: return "CS4236B";
1478         case CS4231_HW_CS4237B: return "CS4237B";
1479         case CS4231_HW_CS4238B: return "CS4238B";
1480         case CS4231_HW_CS4239:  return "CS4239";
1481         case CS4231_HW_INTERWAVE: return "AMD InterWave";
1482         case CS4231_HW_OPL3SA2: return chip->card->shortname;
1483         case CS4231_HW_AD1845: return "AD1845";
1484         default: return "???";
1485         }
1486 }
1487
1488 static int snd_cs4231_new(snd_card_t * card,
1489                           unsigned short hardware,
1490                           unsigned short hwshare,
1491                           cs4231_t ** rchip)
1492 {
1493         cs4231_t *chip;
1494
1495         *rchip = NULL;
1496         chip = snd_magic_kcalloc(cs4231_t, 0, GFP_KERNEL);
1497         if (chip == NULL)
1498                 return -ENOMEM;
1499         chip->hardware = hardware;
1500         chip->hwshare = hwshare;
1501
1502         spin_lock_init(&chip->reg_lock);
1503         init_MUTEX(&chip->mce_mutex);
1504         init_MUTEX(&chip->open_mutex);
1505         chip->card = card;
1506         chip->rate_constraint = snd_cs4231_xrate;
1507         chip->set_playback_format = snd_cs4231_playback_format;
1508         chip->set_capture_format = snd_cs4231_capture_format;
1509         memcpy(&chip->image, &snd_cs4231_original_image, sizeof(snd_cs4231_original_image));
1510
1511         *rchip = chip;
1512         return 0;
1513 }
1514
1515 #ifdef LEGACY_SUPPORT
1516
1517 int snd_cs4231_create(snd_card_t * card,
1518                       unsigned long port,
1519                       unsigned long cport,
1520                       int irq, int dma1, int dma2,
1521                       unsigned short hardware,
1522                       unsigned short hwshare,
1523                       cs4231_t ** rchip)
1524 {
1525         static snd_device_ops_t ops = {
1526                 .dev_free =     snd_cs4231_dev_free,
1527         };
1528         cs4231_t *chip;
1529         int err;
1530
1531         err = snd_cs4231_new(card, hardware, hwshare, &chip);
1532         if (err < 0)
1533                 return err;
1534
1535         chip->irq = -1;
1536         chip->dma1 = -1;
1537         chip->dma2 = -1;
1538
1539         if ((chip->res_port = request_region(port, 4, "CS4231")) == NULL) {
1540                 snd_printk(KERN_ERR "cs4231: can't grab port 0x%lx\n", port);
1541                 snd_cs4231_free(chip);
1542                 return -EBUSY;
1543         }
1544         chip->port = port;
1545         if ((long)cport >= 0 && (chip->res_cport = request_region(cport, 8, "CS4232 Control")) == NULL) {
1546                 snd_printk(KERN_ERR "cs4231: can't grab control port 0x%lx\n", cport);
1547                 snd_cs4231_free(chip);
1548                 return -ENODEV;
1549         }
1550         chip->cport = cport;
1551         if (!(hwshare & CS4231_HWSHARE_IRQ) && request_irq(irq, snd_cs4231_interrupt, SA_INTERRUPT, "CS4231", (void *) chip)) {
1552                 snd_printk(KERN_ERR "cs4231: can't grab IRQ %d\n", irq);
1553                 snd_cs4231_free(chip);
1554                 return -EBUSY;
1555         }
1556         chip->irq = irq;
1557         if (!(hwshare & CS4231_HWSHARE_DMA1) && request_dma(dma1, "CS4231 - 1")) {
1558                 snd_printk(KERN_ERR "cs4231: can't grab DMA1 %d\n", dma1);
1559                 snd_cs4231_free(chip);
1560                 return -EBUSY;
1561         }
1562         chip->dma1 = dma1;
1563         if (!(hwshare & CS4231_HWSHARE_DMA2) && dma1 != dma2 && dma2 >= 0 && request_dma(dma2, "CS4231 - 2")) {
1564                 snd_printk(KERN_ERR "cs4231: can't grab DMA2 %d\n", dma2);
1565                 snd_cs4231_free(chip);
1566                 return -EBUSY;
1567         }
1568         if (dma1 == dma2 || dma2 < 0) {
1569                 chip->single_dma = 1;
1570                 chip->dma2 = chip->dma1;
1571         } else
1572                 chip->dma2 = dma2;
1573
1574         /* global setup */
1575         if (snd_cs4231_probe(chip) < 0) {
1576                 snd_cs4231_free(chip);
1577                 return -ENODEV;
1578         }
1579         snd_cs4231_init(chip);
1580
1581         if (chip->hardware & CS4231_HW_CS4232_MASK) {
1582                 if (chip->res_cport == NULL)
1583                         snd_printk("CS4232 control port features are not accessible\n");
1584         }
1585
1586         /* Register device */
1587         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1588                 snd_cs4231_free(chip);
1589                 return err;
1590         }
1591
1592 #ifdef CONFIG_PM
1593         /* Power Management */
1594         chip->suspend = snd_cs4231_suspend;
1595         chip->resume = snd_cs4231_resume;
1596         snd_card_set_isa_pm_callback(card, snd_cs4231_pm_suspend, snd_cs4231_pm_resume, chip);
1597 #endif
1598
1599         *rchip = chip;
1600         return 0;
1601 }
1602
1603 #endif /* LEGACY_SUPPORT */
1604
1605 static snd_pcm_ops_t snd_cs4231_playback_ops = {
1606         .open =         snd_cs4231_playback_open,
1607         .close =        snd_cs4231_playback_close,
1608         .ioctl =        snd_pcm_lib_ioctl,
1609         .hw_params =    snd_cs4231_playback_hw_params,
1610         .hw_free =      snd_cs4231_playback_hw_free,
1611         .prepare =      snd_cs4231_playback_prepare,
1612         .trigger =      snd_cs4231_trigger,
1613         .pointer =      snd_cs4231_playback_pointer,
1614 };
1615
1616 static snd_pcm_ops_t snd_cs4231_capture_ops = {
1617         .open =         snd_cs4231_capture_open,
1618         .close =        snd_cs4231_capture_close,
1619         .ioctl =        snd_pcm_lib_ioctl,
1620         .hw_params =    snd_cs4231_capture_hw_params,
1621         .hw_free =      snd_cs4231_capture_hw_free,
1622         .prepare =      snd_cs4231_capture_prepare,
1623         .trigger =      snd_cs4231_trigger,
1624         .pointer =      snd_cs4231_capture_pointer,
1625 };
1626
1627 static void snd_cs4231_pcm_free(snd_pcm_t *pcm)
1628 {
1629         cs4231_t *chip = snd_magic_cast(cs4231_t, pcm->private_data, return);
1630         chip->pcm = NULL;
1631         snd_pcm_lib_preallocate_free_for_all(pcm);
1632 }
1633
1634 int snd_cs4231_pcm(cs4231_t *chip, int device, snd_pcm_t **rpcm)
1635 {
1636         snd_pcm_t *pcm;
1637         int err;
1638
1639         if ((err = snd_pcm_new(chip->card, "CS4231", device, 1, 1, &pcm)) < 0)
1640                 return err;
1641
1642         spin_lock_init(&chip->reg_lock);
1643         init_MUTEX(&chip->mce_mutex);
1644         init_MUTEX(&chip->open_mutex);
1645
1646         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4231_playback_ops);
1647         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs4231_capture_ops);
1648
1649         /* global setup */
1650         pcm->private_data = chip;
1651         pcm->private_free = snd_cs4231_pcm_free;
1652         pcm->info_flags = 0;
1653         if (chip->single_dma)
1654                 pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
1655         if (chip->hardware != CS4231_HW_INTERWAVE)
1656                 pcm->info_flags |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1657         strcpy(pcm->name, snd_cs4231_chip_id(chip));
1658
1659 #ifdef LEGACY_SUPPORT
1660         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1661                                               snd_dma_isa_data(),
1662                                               64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);
1663 #else
1664 #  ifdef EBUS_SUPPORT
1665         if (chip->ebus_flag) {
1666                 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1667                                                       chip->dev_u.pdev,
1668                                                       64*1024, 128*1024);
1669         } else {
1670 #  endif
1671 #  ifdef SBUS_SUPPORT
1672                 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_SBUS,
1673                                                       chip->dev_u.sdev,
1674                                                       64*1024, 128*1024);
1675 #  endif
1676 #  ifdef EBUS_SUPPORT
1677         }
1678 #  endif
1679 #endif
1680
1681         chip->pcm = pcm;
1682         if (rpcm)
1683                 *rpcm = pcm;
1684         return 0;
1685 }
1686
1687 static void snd_cs4231_timer_free(snd_timer_t *timer)
1688 {
1689         cs4231_t *chip = snd_magic_cast(cs4231_t, timer->private_data, return);
1690         chip->timer = NULL;
1691 }
1692
1693 int snd_cs4231_timer(cs4231_t *chip, int device, snd_timer_t **rtimer)
1694 {
1695         snd_timer_t *timer;
1696         snd_timer_id_t tid;
1697         int err;
1698
1699         /* Timer initialization */
1700         tid.dev_class = SNDRV_TIMER_CLASS_CARD;
1701         tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1702         tid.card = chip->card->number;
1703         tid.device = device;
1704         tid.subdevice = 0;
1705         if ((err = snd_timer_new(chip->card, "CS4231", &tid, &timer)) < 0)
1706                 return err;
1707         strcpy(timer->name, snd_cs4231_chip_id(chip));
1708         timer->private_data = chip;
1709         timer->private_free = snd_cs4231_timer_free;
1710         timer->hw = snd_cs4231_timer_table;
1711         chip->timer = timer;
1712         if (rtimer)
1713                 *rtimer = timer;
1714         return 0;
1715 }
1716
1717 /*
1718  *  MIXER part
1719  */
1720
1721 static int snd_cs4231_info_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1722 {
1723         static char *texts[4] = {
1724                 "Line", "Aux", "Mic", "Mix"
1725         };
1726         static char *opl3sa_texts[4] = {
1727                 "Line", "CD", "Mic", "Mix"
1728         };
1729         static char *gusmax_texts[4] = {
1730                 "Line", "Synth", "Mic", "Mix"
1731         };
1732         char **ptexts = texts;
1733         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1734
1735         snd_assert(chip->card != NULL, return -EINVAL);
1736         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1737         uinfo->count = 2;
1738         uinfo->value.enumerated.items = 4;
1739         if (uinfo->value.enumerated.item > 3)
1740                 uinfo->value.enumerated.item = 3;
1741         if (!strcmp(chip->card->driver, "GUS MAX"))
1742                 ptexts = gusmax_texts;
1743         switch (chip->hardware) {
1744         case CS4231_HW_INTERWAVE: ptexts = gusmax_texts; break;
1745         case CS4231_HW_OPL3SA2: ptexts = opl3sa_texts; break;
1746         }
1747         strcpy(uinfo->value.enumerated.name, ptexts[uinfo->value.enumerated.item]);
1748         return 0;
1749 }
1750
1751 static int snd_cs4231_get_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1752 {
1753         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1754         unsigned long flags;
1755
1756         spin_lock_irqsave(&chip->reg_lock, flags);
1757         ucontrol->value.enumerated.item[0] = (chip->image[CS4231_LEFT_INPUT] & CS4231_MIXS_ALL) >> 6;
1758         ucontrol->value.enumerated.item[1] = (chip->image[CS4231_RIGHT_INPUT] & CS4231_MIXS_ALL) >> 6;
1759         spin_unlock_irqrestore(&chip->reg_lock, flags);
1760         return 0;
1761 }
1762
1763 static int snd_cs4231_put_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1764 {
1765         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1766         unsigned long flags;
1767         unsigned short left, right;
1768         int change;
1769
1770         if (ucontrol->value.enumerated.item[0] > 3 ||
1771             ucontrol->value.enumerated.item[1] > 3)
1772                 return -EINVAL;
1773         left = ucontrol->value.enumerated.item[0] << 6;
1774         right = ucontrol->value.enumerated.item[1] << 6;
1775         spin_lock_irqsave(&chip->reg_lock, flags);
1776         left = (chip->image[CS4231_LEFT_INPUT] & ~CS4231_MIXS_ALL) | left;
1777         right = (chip->image[CS4231_RIGHT_INPUT] & ~CS4231_MIXS_ALL) | right;
1778         change = left != chip->image[CS4231_LEFT_INPUT] ||
1779                  right != chip->image[CS4231_RIGHT_INPUT];
1780         snd_cs4231_out(chip, CS4231_LEFT_INPUT, left);
1781         snd_cs4231_out(chip, CS4231_RIGHT_INPUT, right);
1782         spin_unlock_irqrestore(&chip->reg_lock, flags);
1783         return change;
1784 }
1785
1786 int snd_cs4231_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1787 {
1788         int mask = (kcontrol->private_value >> 16) & 0xff;
1789
1790         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1791         uinfo->count = 1;
1792         uinfo->value.integer.min = 0;
1793         uinfo->value.integer.max = mask;
1794         return 0;
1795 }
1796
1797 int snd_cs4231_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1798 {
1799         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1800         unsigned long flags;
1801         int reg = kcontrol->private_value & 0xff;
1802         int shift = (kcontrol->private_value >> 8) & 0xff;
1803         int mask = (kcontrol->private_value >> 16) & 0xff;
1804         int invert = (kcontrol->private_value >> 24) & 0xff;
1805
1806         spin_lock_irqsave(&chip->reg_lock, flags);
1807         ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;
1808         spin_unlock_irqrestore(&chip->reg_lock, flags);
1809         if (invert)
1810                 ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
1811         return 0;
1812 }
1813
1814 int snd_cs4231_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1815 {
1816         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1817         unsigned long flags;
1818         int reg = kcontrol->private_value & 0xff;
1819         int shift = (kcontrol->private_value >> 8) & 0xff;
1820         int mask = (kcontrol->private_value >> 16) & 0xff;
1821         int invert = (kcontrol->private_value >> 24) & 0xff;
1822         int change;
1823         unsigned short val;
1824
1825         val = (ucontrol->value.integer.value[0] & mask);
1826         if (invert)
1827                 val = mask - val;
1828         val <<= shift;
1829         spin_lock_irqsave(&chip->reg_lock, flags);
1830         val = (chip->image[reg] & ~(mask << shift)) | val;
1831         change = val != chip->image[reg];
1832         snd_cs4231_out(chip, reg, val);
1833         spin_unlock_irqrestore(&chip->reg_lock, flags);
1834         return change;
1835 }
1836
1837 int snd_cs4231_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
1838 {
1839         int mask = (kcontrol->private_value >> 24) & 0xff;
1840
1841         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1842         uinfo->count = 2;
1843         uinfo->value.integer.min = 0;
1844         uinfo->value.integer.max = mask;
1845         return 0;
1846 }
1847
1848 int snd_cs4231_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1849 {
1850         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1851         unsigned long flags;
1852         int left_reg = kcontrol->private_value & 0xff;
1853         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1854         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1855         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1856         int mask = (kcontrol->private_value >> 24) & 0xff;
1857         int invert = (kcontrol->private_value >> 22) & 1;
1858
1859         spin_lock_irqsave(&chip->reg_lock, flags);
1860         ucontrol->value.integer.value[0] = (chip->image[left_reg] >> shift_left) & mask;
1861         ucontrol->value.integer.value[1] = (chip->image[right_reg] >> shift_right) & mask;
1862         spin_unlock_irqrestore(&chip->reg_lock, flags);
1863         if (invert) {
1864                 ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
1865                 ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
1866         }
1867         return 0;
1868 }
1869
1870 int snd_cs4231_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
1871 {
1872         cs4231_t *chip = snd_kcontrol_chip(kcontrol);
1873         unsigned long flags;
1874         int left_reg = kcontrol->private_value & 0xff;
1875         int right_reg = (kcontrol->private_value >> 8) & 0xff;
1876         int shift_left = (kcontrol->private_value >> 16) & 0x07;
1877         int shift_right = (kcontrol->private_value >> 19) & 0x07;
1878         int mask = (kcontrol->private_value >> 24) & 0xff;
1879         int invert = (kcontrol->private_value >> 22) & 1;
1880         int change;
1881         unsigned short val1, val2;
1882
1883         val1 = ucontrol->value.integer.value[0] & mask;
1884         val2 = ucontrol->value.integer.value[1] & mask;
1885         if (invert) {
1886                 val1 = mask - val1;
1887                 val2 = mask - val2;
1888         }
1889         val1 <<= shift_left;
1890         val2 <<= shift_right;
1891         spin_lock_irqsave(&chip->reg_lock, flags);
1892         val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
1893         val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
1894         change = val1 != chip->image[left_reg] || val2 != chip->image[right_reg];
1895         snd_cs4231_out(chip, left_reg, val1);
1896         snd_cs4231_out(chip, right_reg, val2);
1897         spin_unlock_irqrestore(&chip->reg_lock, flags);
1898         return change;
1899 }
1900
1901 #define CS4231_CONTROLS (sizeof(snd_cs4231_controls)/sizeof(snd_kcontrol_new_t))
1902
1903 static snd_kcontrol_new_t snd_cs4231_controls[] = {
1904 CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
1905 CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),
1906 CS4231_DOUBLE("Line Playback Switch", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
1907 CS4231_DOUBLE("Line Playback Volume", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
1908 CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
1909 CS4231_DOUBLE("Aux Playback Volume", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
1910 CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
1911 CS4231_DOUBLE("Aux Playback Volume", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
1912 CS4231_SINGLE("Mono Playback Switch", 0, CS4231_MONO_CTRL, 7, 1, 1),
1913 CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
1914 CS4231_SINGLE("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, 6, 1, 1),
1915 CS4231_SINGLE("Mono Output Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),
1916 CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0, 15, 0),
1917 {
1918         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1919         .name = "Capture Source",
1920         .info = snd_cs4231_info_mux,
1921         .get = snd_cs4231_get_mux,
1922         .put = snd_cs4231_put_mux,
1923 },
1924 CS4231_DOUBLE("Mic Boost", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5, 1, 0),
1925 CS4231_SINGLE("Loopback Capture Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
1926 CS4231_SINGLE("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1)
1927 };
1928
1929 int snd_cs4231_mixer(cs4231_t *chip)
1930 {
1931         snd_card_t *card;
1932         unsigned int idx;
1933         int err;
1934
1935         snd_assert(chip != NULL && chip->pcm != NULL, return -EINVAL);
1936
1937         card = chip->card;
1938
1939         strcpy(card->mixername, chip->pcm->name);
1940
1941         for (idx = 0; idx < CS4231_CONTROLS; idx++) {
1942                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4231_controls[idx], chip))) < 0)
1943                         return err;
1944         }
1945         return 0;
1946 }
1947
1948 EXPORT_SYMBOL(snd_cs4231_out);
1949 EXPORT_SYMBOL(snd_cs4231_in);
1950 EXPORT_SYMBOL(snd_cs4231_outm);
1951 EXPORT_SYMBOL(snd_cs4236_ext_out);
1952 EXPORT_SYMBOL(snd_cs4236_ext_in);
1953 EXPORT_SYMBOL(snd_cs4231_mce_up);
1954 EXPORT_SYMBOL(snd_cs4231_mce_down);
1955 EXPORT_SYMBOL(snd_cs4231_interrupt);
1956 EXPORT_SYMBOL(snd_cs4231_chip_id);
1957 EXPORT_SYMBOL(snd_cs4231_create);
1958 EXPORT_SYMBOL(snd_cs4231_pcm);
1959 EXPORT_SYMBOL(snd_cs4231_mixer);
1960 EXPORT_SYMBOL(snd_cs4231_timer);
1961 EXPORT_SYMBOL(snd_cs4231_info_single);
1962 EXPORT_SYMBOL(snd_cs4231_get_single);
1963 EXPORT_SYMBOL(snd_cs4231_put_single);
1964 EXPORT_SYMBOL(snd_cs4231_info_double);
1965 EXPORT_SYMBOL(snd_cs4231_get_double);
1966 EXPORT_SYMBOL(snd_cs4231_put_double);
1967
1968 /*
1969  *  INIT part
1970  */
1971
1972 static int __init alsa_cs4231_init(void)
1973 {
1974         return 0;
1975 }
1976
1977 static void __exit alsa_cs4231_exit(void)
1978 {
1979 }
1980
1981 module_init(alsa_cs4231_init)
1982 module_exit(alsa_cs4231_exit)