sound/arm/sa11xx-uda1341.c

   1 /*
   2  *  Driver for Philips UDA1341TS on Compaq iPAQ H3600 soundcard
   3  *  Copyright (C) 2002 Tomas Kasparek <tomas.kasparek@seznam.cz>
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License.
   7  *
   8  * History:
   9  *
  10  * 2002-03-13   Tomas Kasparek  initial release - based on h3600-uda1341.c from OSS
  11  * 2002-03-20   Tomas Kasparek  playback over ALSA is working
  12  * 2002-03-28   Tomas Kasparek  playback over OSS emulation is working
  13  * 2002-03-29   Tomas Kasparek  basic capture is working (native ALSA)
  14  * 2002-03-29   Tomas Kasparek  capture is working (OSS emulation)
  15  * 2002-04-04   Tomas Kasparek  better rates handling (allow non-standard rates)
  16  * 2003-02-14   Brian Avery     fixed full duplex mode, other updates
  17  * 2003-02-20   Tomas Kasparek  merged updates by Brian (except HAL)
  18  * 2003-04-19   Jaroslav Kysela recoded DMA stuff to follow 2.4.18rmk3-hh24 kernel
  19  *                              working suspend and resume
  20  * 2003-04-28   Tomas Kasparek  updated work by Jaroslav to compile it under 2.5.x again
  21  *                              merged HAL layer (patches from Brian)
  22  */
  23
  24 /* $Id: sa11xx-uda1341.c,v 1.27 2005/12/07 09:13:42 cladisch Exp $ */
  25
  26 /***************************************************************************************************
  27 *
  28 * To understand what Alsa Drivers should be doing look at "Writing an Alsa Driver" by Takashi Iwai
  29 * available in the Alsa doc section on the website
  30 *
  31 * A few notes to make things clearer. The UDA1341 is hooked up to Serial port 4 on the SA1100.
  32 * We are using  SSP mode to talk to the UDA1341. The UDA1341 bit & wordselect clocks are generated
  33 * by this UART. Unfortunately, the clock only runs if the transmit buffer has something in it.
  34 * So, if we are just recording, we feed the transmit DMA stream a bunch of 0x0000 so that the
  35 * transmit buffer is full and the clock keeps going. The zeroes come from FLUSH_BASE_PHYS which
  36 * is a mem loc that always decodes to 0's w/ no off chip access.
  37 *
  38 * Some alsa terminology:
  39 *       frame => num_channels * sample_size  e.g stereo 16 bit is 2 * 16 = 32 bytes
  40 *       period => the least number of bytes that will generate an interrupt e.g. we have a 1024 byte
  41 *             buffer and 4 periods in the runtime structure this means we'll get an int every 256
  42 *             bytes or 4 times per buffer.
  43 *             A number of the sizes are in frames rather than bytes, use frames_to_bytes and
  44 *             bytes_to_frames to convert.  The easiest way to tell the units is to look at the
  45 *             type i.e. runtime-> buffer_size is in frames and its type is snd_pcm_uframes_t
  46 *
  47 *       Notes about the pointer fxn:
  48 *       The pointer fxn needs to return the offset into the dma buffer in frames.
  49 *       Interrupts must be blocked before calling the dma_get_pos fxn to avoid race with interrupts.
  50 *
  51 *       Notes about pause/resume
  52 *       Implementing this would be complicated so it's skipped.  The problem case is:
  53 *       A full duplex connection is going, then play is paused. At this point you need to start xmitting
  54 *       0's to keep the record active which means you cant just freeze the dma and resume it later you'd
  55 *       need to save off the dma info, and restore it properly on a resume.  Yeach!
  56 *
  57 *       Notes about transfer methods:
  58 *       The async write calls fail.  I probably need to implement something else to support them?
  59 *
  60 ***************************************************************************************************/
  61
  62 #include <linux/config.h>
  63 #include <sound/driver.h>
  64 #include <linux/module.h>
  65 #include <linux/moduleparam.h>
  66 #include <linux/init.h>
  67 #include <linux/err.h>
  68 #include <linux/platform_device.h>
  69 #include <linux/errno.h>
  70 #include <linux/ioctl.h>
  71 #include <linux/delay.h>
  72 #include <linux/slab.h>
  73
  74 #ifdef CONFIG_PM
  75 #include <linux/pm.h>
  76 #endif
  77
  78 #include <asm/hardware.h>
  79 #include <asm/arch/h3600.h>
  80 #include <asm/mach-types.h>
  81 #include <asm/dma.h>
  82
  83 #ifdef CONFIG_H3600_HAL
  84 #include <asm/semaphore.h>
  85 #include <asm/uaccess.h>
  86 #include <asm/arch/h3600_hal.h>
  87 #endif
  88
  89 #include <sound/core.h>
  90 #include <sound/pcm.h>
  91 #include <sound/initval.h>
  92
  93 #include <linux/l3/l3.h>
  94
  95 #undef DEBUG_MODE
  96 #undef DEBUG_FUNCTION_NAMES
  97 #include <sound/uda1341.h>
  98
  99 /*
 100  * FIXME: Is this enough as autodetection of 2.4.X-rmkY-hhZ kernels?
 101  * We use DMA stuff from 2.4.18-rmk3-hh24 here to be able to compile this
 102  * module for Familiar 0.6.1
 103  */
 104 #ifdef CONFIG_H3600_HAL
 105 #define HH_VERSION 1
 106 #endif
 107
 108 /* {{{ Type definitions */
 109
 110 MODULE_AUTHOR("Tomas Kasparek <tomas.kasparek@seznam.cz>");
 111 MODULE_LICENSE("GPL");
 112 MODULE_DESCRIPTION("SA1100/SA1111 + UDA1341TS driver for ALSA");
 113 MODULE_SUPPORTED_DEVICE("{{UDA1341,iPAQ H3600 UDA1341TS}}");
 114
 115 static char *id = NULL; /* ID for this card */
 116
 117 module_param(id, charp, 0444);
 118 MODULE_PARM_DESC(id, "ID string for SA1100/SA1111 + UDA1341TS soundcard.");
 119
 120 struct audio_stream {
 121         char *id;               /* identification string */
 122         int stream_id;          /* numeric identification */
 123         dma_device_t dma_dev;   /* device identifier for DMA */
 124 #ifdef HH_VERSION
 125         dmach_t dmach;          /* dma channel identification */
 126 #else
 127         dma_regs_t *dma_regs;   /* points to our DMA registers */
 128 #endif
 129         int active:1;           /* we are using this stream for transfer now */
 130         int period;             /* current transfer period */
 131         int periods;            /* current count of periods registerd in the DMA engine */
 132         int tx_spin;            /* are we recoding - flag used to do DMA trans. for sync */
 133         unsigned int old_offset;
 134         spinlock_t dma_lock;    /* for locking in DMA operations (see dma-sa1100.c in the kernel) */
 135         struct snd_pcm_substream *stream;
 136 };
 137
 138 struct sa11xx_uda1341 {
 139         struct snd_card *card;
 140         struct l3_client *uda1341;
 141         struct snd_pcm *pcm;
 142         long samplerate;
 143         struct audio_stream s[2];       /* playback & capture */
 144 };
 145
 146 static unsigned int rates[] = {
 147         8000,  10666, 10985, 14647,
 148         16000, 21970, 22050, 24000,
 149         29400, 32000, 44100, 48000,
 150 };
 151
 152 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 153         .count  = ARRAY_SIZE(rates),
 154         .list   = rates,
 155         .mask   = 0,
 156 };
 157
 158 static struct platform_device *device;
 159
 160 /* }}} */
 161
 162 /* {{{ Clock and sample rate stuff */
 163
 164 /*
 165  * Stop-gap solution until rest of hh.org HAL stuff is merged.
 166  */
 167 #define GPIO_H3600_CLK_SET0             GPIO_GPIO (12)
 168 #define GPIO_H3600_CLK_SET1             GPIO_GPIO (13)
 169
 170 #ifdef CONFIG_SA1100_H3XXX
 171 #define clr_sa11xx_uda1341_egpio(x)     clr_h3600_egpio(x)
 172 #define set_sa11xx_uda1341_egpio(x)     set_h3600_egpio(x)
 173 #else
 174 #error This driver could serve H3x00 handhelds only!
 175 #endif
 176
 177 static void sa11xx_uda1341_set_audio_clock(long val)
 178 {
 179         switch (val) {
 180         case 24000: case 32000: case 48000:     /* 00: 12.288 MHz */
 181                 GPCR = GPIO_H3600_CLK_SET0 | GPIO_H3600_CLK_SET1;
 182                 break;
 183
 184         case 22050: case 29400: case 44100:     /* 01: 11.2896 MHz */
 185                 GPSR = GPIO_H3600_CLK_SET0;
 186                 GPCR = GPIO_H3600_CLK_SET1;
 187                 break;
 188
 189         case 8000: case 10666: case 16000:      /* 10: 4.096 MHz */
 190                 GPCR = GPIO_H3600_CLK_SET0;
 191                 GPSR = GPIO_H3600_CLK_SET1;
 192                 break;
 193
 194         case 10985: case 14647: case 21970:     /* 11: 5.6245 MHz */
 195                 GPSR = GPIO_H3600_CLK_SET0 | GPIO_H3600_CLK_SET1;
 196                 break;
 197         }
 198 }
 199
 200 static void sa11xx_uda1341_set_samplerate(struct sa11xx_uda1341 *sa11xx_uda1341, long rate)
 201 {
 202         int clk_div = 0;
 203         int clk=0;
 204
 205         /* We don't want to mess with clocks when frames are in flight */
 206         Ser4SSCR0 &= ~SSCR0_SSE;
 207         /* wait for any frame to complete */
 208         udelay(125);
 209
 210         /*
 211          * We have the following clock sources:
 212          * 4.096 MHz, 5.6245 MHz, 11.2896 MHz, 12.288 MHz
 213          * Those can be divided either by 256, 384 or 512.
 214          * This makes up 12 combinations for the following samplerates...
 215          */
 216         if (rate >= 48000)
 217                 rate = 48000;
 218         else if (rate >= 44100)
 219                 rate = 44100;
 220         else if (rate >= 32000)
 221                 rate = 32000;
 222         else if (rate >= 29400)
 223                 rate = 29400;
 224         else if (rate >= 24000)
 225                 rate = 24000;
 226         else if (rate >= 22050)
 227                 rate = 22050;
 228         else if (rate >= 21970)
 229                 rate = 21970;
 230         else if (rate >= 16000)
 231                 rate = 16000;
 232         else if (rate >= 14647)
 233                 rate = 14647;
 234         else if (rate >= 10985)
 235                 rate = 10985;
 236         else if (rate >= 10666)
 237                 rate = 10666;
 238         else
 239                 rate = 8000;
 240
 241         /* Set the external clock generator */
 242 #ifdef CONFIG_H3600_HAL
 243         h3600_audio_clock(rate);
 244 #else
 245         sa11xx_uda1341_set_audio_clock(rate);
 246 #endif
 247
 248         /* Select the clock divisor */
 249         switch (rate) {
 250         case 8000:
 251         case 10985:
 252         case 22050:
 253         case 24000:
 254                 clk = F512;
 255                 clk_div = SSCR0_SerClkDiv(16);
 256                 break;
 257         case 16000:
 258         case 21970:
 259         case 44100:
 260         case 48000:
 261                 clk = F256;
 262                 clk_div = SSCR0_SerClkDiv(8);
 263                 break;
 264         case 10666:
 265         case 14647:
 266         case 29400:
 267         case 32000:
 268                 clk = F384;
 269                 clk_div = SSCR0_SerClkDiv(12);
 270                 break;
 271         }
 272
 273         /* FMT setting should be moved away when other FMTs are added (FIXME) */
 274         l3_command(sa11xx_uda1341->uda1341, CMD_FORMAT, (void *)LSB16);
 275
 276         l3_command(sa11xx_uda1341->uda1341, CMD_FS, (void *)clk);
 277         Ser4SSCR0 = (Ser4SSCR0 & ~0xff00) + clk_div + SSCR0_SSE;
 278         sa11xx_uda1341->samplerate = rate;
 279 }
 280
 281 /* }}} */
 282
 283 /* {{{ HW init and shutdown */
 284
 285 static void sa11xx_uda1341_audio_init(struct sa11xx_uda1341 *sa11xx_uda1341)
 286 {
 287         unsigned long flags;
 288
 289         /* Setup DMA stuff */
 290         sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK].id = "UDA1341 out";
 291         sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK].stream_id = SNDRV_PCM_STREAM_PLAYBACK;
 292         sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK].dma_dev = DMA_Ser4SSPWr;
 293
 294         sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE].id = "UDA1341 in";
 295         sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE].stream_id = SNDRV_PCM_STREAM_CAPTURE;
 296         sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE].dma_dev = DMA_Ser4SSPRd;
 297
 298         /* Initialize the UDA1341 internal state */
 299
 300         /* Setup the uarts */
 301         local_irq_save(flags);
 302         GAFR |= (GPIO_SSP_CLK);
 303         GPDR &= ~(GPIO_SSP_CLK);
 304         Ser4SSCR0 = 0;
 305         Ser4SSCR0 = SSCR0_DataSize(16) + SSCR0_TI + SSCR0_SerClkDiv(8);
 306         Ser4SSCR1 = SSCR1_SClkIactL + SSCR1_SClk1P + SSCR1_ExtClk;
 307         Ser4SSCR0 |= SSCR0_SSE;
 308         local_irq_restore(flags);
 309
 310         /* Enable the audio power */
 311 #ifdef CONFIG_H3600_HAL
 312         h3600_audio_power(AUDIO_RATE_DEFAULT);
 313 #else
 314         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_CODEC_NRESET);
 315         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_AUDIO_ON);
 316         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 317 #endif
 318
 319         /* Wait for the UDA1341 to wake up */
 320         mdelay(1); //FIXME - was removed by Perex - Why?
 321
 322         /* Initialize the UDA1341 internal state */
 323         l3_open(sa11xx_uda1341->uda1341);
 324
 325         /* external clock configuration (after l3_open - regs must be initialized */
 326         sa11xx_uda1341_set_samplerate(sa11xx_uda1341, sa11xx_uda1341->samplerate);
 327
 328         /* Wait for the UDA1341 to wake up */
 329         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_CODEC_NRESET);
 330         mdelay(1);
 331
 332         /* make the left and right channels unswapped (flip the WS latch) */
 333         Ser4SSDR = 0;
 334
 335 #ifdef CONFIG_H3600_HAL
 336         h3600_audio_mute(0);
 337 #else
 338         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 339 #endif
 340 }
 341
 342 static void sa11xx_uda1341_audio_shutdown(struct sa11xx_uda1341 *sa11xx_uda1341)
 343 {
 344         /* mute on */
 345 #ifdef CONFIG_H3600_HAL
 346         h3600_audio_mute(1);
 347 #else
 348         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 349 #endif
 350
 351         /* disable the audio power and all signals leading to the audio chip */
 352         l3_close(sa11xx_uda1341->uda1341);
 353         Ser4SSCR0 = 0;
 354         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_CODEC_NRESET);
 355
 356         /* power off and mute off */
 357         /* FIXME - is muting off necesary??? */
 358 #ifdef CONFIG_H3600_HAL
 359         h3600_audio_power(0);
 360         h3600_audio_mute(0);
 361 #else
 362         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_AUDIO_ON);
 363         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 364 #endif
 365 }
 366
 367 /* }}} */
 368
 369 /* {{{ DMA staff */
 370
 371 /*
 372  * these are the address and sizes used to fill the xmit buffer
 373  * so we can get a clock in record only mode
 374  */
 375 #define FORCE_CLOCK_ADDR                (dma_addr_t)FLUSH_BASE_PHYS
 376 #define FORCE_CLOCK_SIZE                4096 // was 2048
 377
 378 // FIXME Why this value exactly - wrote comment
 379 #define DMA_BUF_SIZE    8176    /* <= MAX_DMA_SIZE from asm/arch-sa1100/dma.h */
 380
 381 #ifdef HH_VERSION
 382
 383 static int audio_dma_request(struct audio_stream *s, void (*callback)(void *, int))
 384 {
 385         int ret;
 386
 387         ret = sa1100_request_dma(&s->dmach, s->id, s->dma_dev);
 388         if (ret < 0) {
 389                 printk(KERN_ERR "unable to grab audio dma 0x%x\n", s->dma_dev);
 390                 return ret;
 391         }
 392         sa1100_dma_set_callback(s->dmach, callback);
 393         return 0;
 394 }
 395
 396 static inline void audio_dma_free(struct audio_stream *s)
 397 {
 398         sa1100_free_dma(s->dmach);
 399         s->dmach = -1;
 400 }
 401
 402 #else
 403
 404 static int audio_dma_request(struct audio_stream *s, void (*callback)(void *))
 405 {
 406         int ret;
 407
 408         ret = sa1100_request_dma(s->dma_dev, s->id, callback, s, &s->dma_regs);
 409         if (ret < 0)
 410                 printk(KERN_ERR "unable to grab audio dma 0x%x\n", s->dma_dev);
 411         return ret;
 412 }
 413
 414 static void audio_dma_free(struct audio_stream *s)
 415 {
 416         sa1100_free_dma(s->dma_regs);
 417         s->dma_regs = 0;
 418 }
 419
 420 #endif
 421
 422 static u_int audio_get_dma_pos(struct audio_stream *s)
 423 {
 424         struct snd_pcm_substream *substream = s->stream;
 425         struct snd_pcm_runtime *runtime = substream->runtime;
 426         unsigned int offset;
 427         unsigned long flags;
 428         dma_addr_t addr;
 429
 430         // this must be called w/ interrupts locked out see dma-sa1100.c in the kernel
 431         spin_lock_irqsave(&s->dma_lock, flags);
 432 #ifdef HH_VERSION
 433         sa1100_dma_get_current(s->dmach, NULL, &addr);
 434 #else
 435         addr = sa1100_get_dma_pos((s)->dma_regs);
 436 #endif
 437         offset = addr - runtime->dma_addr;
 438         spin_unlock_irqrestore(&s->dma_lock, flags);
 439
 440         offset = bytes_to_frames(runtime,offset);
 441         if (offset >= runtime->buffer_size)
 442                 offset = 0;
 443
 444         return offset;
 445 }
 446
 447 /*
 448  * this stops the dma and clears the dma ptrs
 449  */
 450 static void audio_stop_dma(struct audio_stream *s)
 451 {
 452         unsigned long flags;
 453
 454         spin_lock_irqsave(&s->dma_lock, flags);
 455         s->active = 0;
 456         s->period = 0;
 457         /* this stops the dma channel and clears the buffer ptrs */
 458 #ifdef HH_VERSION
 459         sa1100_dma_flush_all(s->dmach);
 460 #else
 461         sa1100_clear_dma(s->dma_regs);
 462 #endif
 463         spin_unlock_irqrestore(&s->dma_lock, flags);
 464 }
 465
 466 static void audio_process_dma(struct audio_stream *s)
 467 {
 468         struct snd_pcm_substream *substream = s->stream;
 469         struct snd_pcm_runtime *runtime;
 470         unsigned int dma_size;
 471         unsigned int offset;
 472         int ret;
 473
 474         /* we are requested to process synchronization DMA transfer */
 475         if (s->tx_spin) {
 476                 snd_assert(s->stream_id == SNDRV_PCM_STREAM_PLAYBACK, return);
 477                 /* fill the xmit dma buffers and return */
 478 #ifdef HH_VERSION
 479                 sa1100_dma_set_spin(s->dmach, FORCE_CLOCK_ADDR, FORCE_CLOCK_SIZE);
 480 #else
 481                 while (1) {
 482                         ret = sa1100_start_dma(s->dma_regs, FORCE_CLOCK_ADDR, FORCE_CLOCK_SIZE);
 483                         if (ret)
 484                                 return;
 485                 }
 486 #endif
 487                 return;
 488         }
 489
 490         /* must be set here - only valid for running streams, not for forced_clock dma fills  */
 491         runtime = substream->runtime;
 492         while (s->active && s->periods < runtime->periods) {
 493                 dma_size = frames_to_bytes(runtime, runtime->period_size);
 494                 if (s->old_offset) {
 495                         /* a little trick, we need resume from old position */
 496                         offset = frames_to_bytes(runtime, s->old_offset - 1);
 497                         s->old_offset = 0;
 498                         s->periods = 0;
 499                         s->period = offset / dma_size;
 500                         offset %= dma_size;
 501                         dma_size = dma_size - offset;
 502                         if (!dma_size)
 503                                 continue;               /* special case */
 504                 } else {
 505                         offset = dma_size * s->period;
 506                         snd_assert(dma_size <= DMA_BUF_SIZE, );
 507                 }
 508 #ifdef HH_VERSION
 509                 ret = sa1100_dma_queue_buffer(s->dmach, s, runtime->dma_addr + offset, dma_size);
 510                 if (ret)
 511                         return; //FIXME
 512 #else
 513                 ret = sa1100_start_dma((s)->dma_regs, runtime->dma_addr + offset, dma_size);
 514                 if (ret) {
 515                         printk(KERN_ERR "audio_process_dma: cannot queue DMA buffer (%i)\n", ret);
 516                         return;
 517                 }
 518 #endif
 519
 520                 s->period++;
 521                 s->period %= runtime->periods;
 522                 s->periods++;
 523         }
 524 }
 525
 526 #ifdef HH_VERSION
 527 static void audio_dma_callback(void *data, int size)
 528 #else
 529 static void audio_dma_callback(void *data)
 530 #endif
 531 {
 532         struct audio_stream *s = data;
 533
 534         /*
 535          * If we are getting a callback for an active stream then we inform
 536          * the PCM middle layer we've finished a period
 537          */
 538         if (s->active)
 539                 snd_pcm_period_elapsed(s->stream);
 540
 541         spin_lock(&s->dma_lock);
 542         if (!s->tx_spin && s->periods > 0)
 543                 s->periods--;
 544         audio_process_dma(s);
 545         spin_unlock(&s->dma_lock);
 546 }
 547
 548 /* }}} */
 549
 550 /* {{{ PCM setting */
 551
 552 /* {{{ trigger & timer */
 553
 554 static int snd_sa11xx_uda1341_trigger(struct snd_pcm_substream *substream, int cmd)
 555 {
 556         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 557         int stream_id = substream->pstr->stream;
 558         struct audio_stream *s = &chip->s[stream_id];
 559         struct audio_stream *s1 = &chip->s[stream_id ^ 1];
 560         int err = 0;
 561
 562         /* note local interrupts are already disabled in the midlevel code */
 563         spin_lock(&s->dma_lock);
 564         switch (cmd) {
 565         case SNDRV_PCM_TRIGGER_START:
 566                 /* now we need to make sure a record only stream has a clock */
 567                 if (stream_id == SNDRV_PCM_STREAM_CAPTURE && !s1->active) {
 568                         /* we need to force fill the xmit DMA with zeros */
 569                         s1->tx_spin = 1;
 570                         audio_process_dma(s1);
 571                 }
 572                 /* this case is when you were recording then you turn on a
 573                  * playback stream so we stop (also clears it) the dma first,
 574                  * clear the sync flag and then we let it turned on
 575                  */
 576                 else {
 577                         s->tx_spin = 0;
 578                 }
 579
 580                 /* requested stream startup */
 581                 s->active = 1;
 582                 audio_process_dma(s);
 583                 break;
 584         case SNDRV_PCM_TRIGGER_STOP:
 585                 /* requested stream shutdown */
 586                 audio_stop_dma(s);
 587
 588                 /*
 589                  * now we need to make sure a record only stream has a clock
 590                  * so if we're stopping a playback with an active capture
 591                  * we need to turn the 0 fill dma on for the xmit side
 592                  */
 593                 if (stream_id == SNDRV_PCM_STREAM_PLAYBACK && s1->active) {
 594                         /* we need to force fill the xmit DMA with zeros */
 595                         s->tx_spin = 1;
 596                         audio_process_dma(s);
 597                 }
 598                 /*
 599                  * we killed a capture only stream, so we should also kill
 600                  * the zero fill transmit
 601                  */
 602                 else {
 603                         if (s1->tx_spin) {
 604                                 s1->tx_spin = 0;
 605                                 audio_stop_dma(s1);
 606                         }
 607                 }
 608
 609                 break;
 610         case SNDRV_PCM_TRIGGER_SUSPEND:
 611                 s->active = 0;
 612 #ifdef HH_VERSION
 613                 sa1100_dma_stop(s->dmach);
 614 #else
 615                 //FIXME - DMA API
 616 #endif
 617                 s->old_offset = audio_get_dma_pos(s) + 1;
 618 #ifdef HH_VERSION
 619                 sa1100_dma_flush_all(s->dmach);
 620 #else
 621                 //FIXME - DMA API
 622 #endif
 623                 s->periods = 0;
 624                 break;
 625         case SNDRV_PCM_TRIGGER_RESUME:
 626                 s->active = 1;
 627                 s->tx_spin = 0;
 628                 audio_process_dma(s);
 629                 if (stream_id == SNDRV_PCM_STREAM_CAPTURE && !s1->active) {
 630                         s1->tx_spin = 1;
 631                         audio_process_dma(s1);
 632                 }
 633                 break;
 634         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 635 #ifdef HH_VERSION
 636                 sa1100_dma_stop(s->dmach);
 637 #else
 638                 //FIXME - DMA API
 639 #endif
 640                 s->active = 0;
 641                 if (stream_id == SNDRV_PCM_STREAM_PLAYBACK) {
 642                         if (s1->active) {
 643                                 s->tx_spin = 1;
 644                                 s->old_offset = audio_get_dma_pos(s) + 1;
 645 #ifdef HH_VERSION
 646                                 sa1100_dma_flush_all(s->dmach);
 647 #else
 648                                 //FIXME - DMA API
 649 #endif
 650                                 audio_process_dma(s);
 651                         }
 652                 } else {
 653                         if (s1->tx_spin) {
 654                                 s1->tx_spin = 0;
 655 #ifdef HH_VERSION
 656                                 sa1100_dma_flush_all(s1->dmach);
 657 #else
 658                                 //FIXME - DMA API
 659 #endif
 660                         }
 661                 }
 662                 break;
 663         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 664                 s->active = 1;
 665                 if (s->old_offset) {
 666                         s->tx_spin = 0;
 667                         audio_process_dma(s);
 668                         break;
 669                 }
 670                 if (stream_id == SNDRV_PCM_STREAM_CAPTURE && !s1->active) {
 671                         s1->tx_spin = 1;
 672                         audio_process_dma(s1);
 673                 }
 674 #ifdef HH_VERSION
 675                 sa1100_dma_resume(s->dmach);
 676 #else
 677                 //FIXME - DMA API
 678 #endif
 679                 break;
 680         default:
 681                 err = -EINVAL;
 682                 break;
 683         }
 684         spin_unlock(&s->dma_lock);
 685         return err;
 686 }
 687
 688 static int snd_sa11xx_uda1341_prepare(struct snd_pcm_substream *substream)
 689 {
 690         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 691         struct snd_pcm_runtime *runtime = substream->runtime;
 692         struct audio_stream *s = &chip->s[substream->pstr->stream];
 693
 694         /* set requested samplerate */
 695         sa11xx_uda1341_set_samplerate(chip, runtime->rate);
 696
 697         /* set requestd format when available */
 698         /* set FMT here !!! FIXME */
 699
 700         s->period = 0;
 701         s->periods = 0;
 702
 703         return 0;
 704 }
 705
 706 static snd_pcm_uframes_t snd_sa11xx_uda1341_pointer(struct snd_pcm_substream *substream)
 707 {
 708         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 709         return audio_get_dma_pos(&chip->s[substream->pstr->stream]);
 710 }
 711
 712 /* }}} */
 713
 714 static struct snd_pcm_hardware snd_sa11xx_uda1341_capture =
 715 {
 716         .info                   = (SNDRV_PCM_INFO_INTERLEAVED |
 717                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
 718                                    SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
 719                                    SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
 720         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
 721         .rates                  = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
 722                                    SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |\
 723                                    SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 724                                    SNDRV_PCM_RATE_KNOT),
 725         .rate_min               = 8000,
 726         .rate_max               = 48000,
 727         .channels_min           = 2,
 728         .channels_max           = 2,
 729         .buffer_bytes_max       = 64*1024,
 730         .period_bytes_min       = 64,
 731         .period_bytes_max       = DMA_BUF_SIZE,
 732         .periods_min            = 2,
 733         .periods_max            = 255,
 734         .fifo_size              = 0,
 735 };
 736
 737 static struct snd_pcm_hardware snd_sa11xx_uda1341_playback =
 738 {
 739         .info                   = (SNDRV_PCM_INFO_INTERLEAVED |
 740                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
 741                                    SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
 742                                    SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
 743         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
 744         .rates                  = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
 745                                    SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |\
 746                                    SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 747                                    SNDRV_PCM_RATE_KNOT),
 748         .rate_min               = 8000,
 749         .rate_max               = 48000,
 750         .channels_min           = 2,
 751         .channels_max           = 2,
 752         .buffer_bytes_max       = 64*1024,
 753         .period_bytes_min       = 64,
 754         .period_bytes_max       = DMA_BUF_SIZE,
 755         .periods_min            = 2,
 756         .periods_max            = 255,
 757         .fifo_size              = 0,
 758 };
 759
 760 static int snd_card_sa11xx_uda1341_open(struct snd_pcm_substream *substream)
 761 {
 762         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 763         struct snd_pcm_runtime *runtime = substream->runtime;
 764         int stream_id = substream->pstr->stream;
 765         int err;
 766
 767         chip->s[stream_id].stream = substream;
 768
 769         if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
 770                 runtime->hw = snd_sa11xx_uda1341_playback;
 771         else
 772                 runtime->hw = snd_sa11xx_uda1341_capture;
 773         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 774                 return err;
 775         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 776                 return err;
 777
 778         return 0;
 779 }
 780
 781 static int snd_card_sa11xx_uda1341_close(struct snd_pcm_substream *substream)
 782 {
 783         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 784
 785         chip->s[substream->pstr->stream].stream = NULL;
 786         return 0;
 787 }
 788
 789 /* {{{ HW params & free */
 790
 791 static int snd_sa11xx_uda1341_hw_params(struct snd_pcm_substream *substream,
 792                                         struct snd_pcm_hw_params *hw_params)
 793 {
 794
 795         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 796 }
 797
 798 static int snd_sa11xx_uda1341_hw_free(struct snd_pcm_substream *substream)
 799 {
 800         return snd_pcm_lib_free_pages(substream);
 801 }
 802
 803 /* }}} */
 804
 805 static struct snd_pcm_ops snd_card_sa11xx_uda1341_playback_ops = {
 806         .open                   = snd_card_sa11xx_uda1341_open,
 807         .close                  = snd_card_sa11xx_uda1341_close,
 808         .ioctl                  = snd_pcm_lib_ioctl,
 809         .hw_params              = snd_sa11xx_uda1341_hw_params,
 810         .hw_free                = snd_sa11xx_uda1341_hw_free,
 811         .prepare                = snd_sa11xx_uda1341_prepare,
 812         .trigger                = snd_sa11xx_uda1341_trigger,
 813         .pointer                = snd_sa11xx_uda1341_pointer,
 814 };
 815
 816 static struct snd_pcm_ops snd_card_sa11xx_uda1341_capture_ops = {
 817         .open                   = snd_card_sa11xx_uda1341_open,
 818         .close                  = snd_card_sa11xx_uda1341_close,
 819         .ioctl                  = snd_pcm_lib_ioctl,
 820         .hw_params              = snd_sa11xx_uda1341_hw_params,
 821         .hw_free                = snd_sa11xx_uda1341_hw_free,
 822         .prepare                = snd_sa11xx_uda1341_prepare,
 823         .trigger                = snd_sa11xx_uda1341_trigger,
 824         .pointer                = snd_sa11xx_uda1341_pointer,
 825 };
 826
 827 static int __init snd_card_sa11xx_uda1341_pcm(struct sa11xx_uda1341 *sa11xx_uda1341, int device)
 828 {
 829         struct snd_pcm *pcm;
 830         int err;
 831
 832         if ((err = snd_pcm_new(sa11xx_uda1341->card, "UDA1341 PCM", device, 1, 1, &pcm)) < 0)
 833                 return err;
 834
 835         /*
 836          * this sets up our initial buffers and sets the dma_type to isa.
 837          * isa works but I'm not sure why (or if) it's the right choice
 838          * this may be too large, trying it for now
 839          */
 840         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 841                                               snd_dma_isa_data(),
 842                                               64*1024, 64*1024);
 843
 844         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_sa11xx_uda1341_playback_ops);
 845         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_sa11xx_uda1341_capture_ops);
 846         pcm->private_data = sa11xx_uda1341;
 847         pcm->info_flags = 0;
 848         strcpy(pcm->name, "UDA1341 PCM");
 849
 850         sa11xx_uda1341_audio_init(sa11xx_uda1341);
 851
 852         /* setup DMA controller */
 853         audio_dma_request(&sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK], audio_dma_callback);
 854         audio_dma_request(&sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE], audio_dma_callback);
 855
 856         sa11xx_uda1341->pcm = pcm;
 857
 858         return 0;
 859 }
 860
 861 /* }}} */
 862
 863 /* {{{ module init & exit */
 864
 865 #ifdef CONFIG_PM
 866
 867 static int snd_sa11xx_uda1341_suspend(struct platform_device *devptr,
 868                                       pm_message_t state)
 869 {
 870         struct snd_card *card = platform_get_drvdata(devptr);
 871         struct sa11xx_uda1341 *chip = card->private_data;
 872
 873         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 874         snd_pcm_suspend_all(chip->pcm);
 875 #ifdef HH_VERSION
 876         sa1100_dma_sleep(chip->s[SNDRV_PCM_STREAM_PLAYBACK].dmach);
 877         sa1100_dma_sleep(chip->s[SNDRV_PCM_STREAM_CAPTURE].dmach);
 878 #else
 879         //FIXME
 880 #endif
 881         l3_command(chip->uda1341, CMD_SUSPEND, NULL);
 882         sa11xx_uda1341_audio_shutdown(chip);
 883
 884         return 0;
 885 }
 886
 887 static int snd_sa11xx_uda1341_resume(struct platform_device *devptr)
 888 {
 889         struct snd_card *card = platform_get_drvdata(devptr);
 890         struct sa11xx_uda1341 *chip = card->private_data;
 891
 892         sa11xx_uda1341_audio_init(chip);
 893         l3_command(chip->uda1341, CMD_RESUME, NULL);
 894 #ifdef HH_VERSION
 895         sa1100_dma_wakeup(chip->s[SNDRV_PCM_STREAM_PLAYBACK].dmach);
 896         sa1100_dma_wakeup(chip->s[SNDRV_PCM_STREAM_CAPTURE].dmach);
 897 #else
 898         //FIXME
 899 #endif
 900         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 901         return 0;
 902 }
 903 #endif /* COMFIG_PM */
 904
 905 void snd_sa11xx_uda1341_free(struct snd_card *card)
 906 {
 907         struct sa11xx_uda1341 *chip = card->private_data;
 908
 909         audio_dma_free(&chip->s[SNDRV_PCM_STREAM_PLAYBACK]);
 910         audio_dma_free(&chip->s[SNDRV_PCM_STREAM_CAPTURE]);
 911 }
 912
 913 static int __init sa11xx_uda1341_probe(struct platform_device *devptr)
 914 {
 915         int err;
 916         struct snd_card *card;
 917         struct sa11xx_uda1341 *chip;
 918
 919         /* register the soundcard */
 920         card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct sa11xx_uda1341));
 921         if (card == NULL)
 922                 return -ENOMEM;
 923
 924         chip = card->private_data;
 925         spin_lock_init(&chip->s[0].dma_lock);
 926         spin_lock_init(&chip->s[1].dma_lock);
 927
 928         card->private_free = snd_sa11xx_uda1341_free;
 929         chip->card = card;
 930         chip->samplerate = AUDIO_RATE_DEFAULT;
 931
 932         // mixer
 933         if ((err = snd_chip_uda1341_mixer_new(card, &chip->uda1341)))
 934                 goto nodev;
 935
 936         // PCM
 937         if ((err = snd_card_sa11xx_uda1341_pcm(chip, 0)) < 0)
 938                 goto nodev;
 939
 940         strcpy(card->driver, "UDA1341");
 941         strcpy(card->shortname, "H3600 UDA1341TS");
 942         sprintf(card->longname, "Compaq iPAQ H3600 with Philips UDA1341TS");
 943
 944         snd_card_set_dev(card, &devptr->dev);
 945
 946         if ((err = snd_card_register(card)) == 0) {
 947                 printk( KERN_INFO "iPAQ audio support initialized\n" );
 948                 platform_set_drvdata(devptr, card);
 949                 return 0;
 950         }
 951
 952  nodev:
 953         snd_card_free(card);
 954         return err;
 955 }
 956
 957 static int __devexit sa11xx_uda1341_remove(struct platform_device *devptr)
 958 {
 959         snd_card_free(platform_get_drvdata(devptr));
 960         platform_set_drvdata(devptr, NULL);
 961         return 0;
 962 }
 963
 964 #define SA11XX_UDA1341_DRIVER   "sa11xx_uda1341"
 965
 966 static struct platform_driver sa11xx_uda1341_driver = {
 967         .probe          = sa11xx_uda1341_probe,
 968         .remove         = __devexit_p(sa11xx_uda1341_remove),
 969 #ifdef CONFIG_PM
 970         .suspend        = snd_sa11xx_uda1341_suspend,
 971         .resume         = snd_sa11xx_uda1341_resume,
 972 #endif
 973         .driver         = {
 974                 .name   = SA11XX_UDA1341_DRIVER,
 975         },
 976 };
 977
 978 static int __init sa11xx_uda1341_init(void)
 979 {
 980         int err;
 981
 982         if (!machine_is_h3xxx())
 983                 return -ENODEV;
 984         if ((err = platform_driver_register(&sa11xx_uda1341_driver)) < 0)
 985                 return err;
 986         device = platform_device_register_simple(SA11XX_UDA1341_DRIVER, -1, NULL, 0);
 987         if (IS_ERR(device)) {
 988                 platform_driver_unregister(&sa11xx_uda1341_driver);
 989                 return PTR_ERR(device);
 990         }
 991         return 0;
 992 }
 993
 994 static void __exit sa11xx_uda1341_exit(void)
 995 {
 996         platform_device_unregister(device);
 997         platform_driver_unregister(&sa11xx_uda1341_driver);
 998 }
 999
1000 module_init(sa11xx_uda1341_init);
1001 module_exit(sa11xx_uda1341_exit);
1002
1003 /* }}} */
1004
1005 /*
1006  * Local variables:
1007  * indent-tabs-mode: t
1008  * End:
1009  */