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 <sound/driver.h>
  63 #include <linux/module.h>
  64 #include <linux/moduleparam.h>
  65 #include <linux/init.h>
  66 #include <linux/err.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/errno.h>
  69 #include <linux/ioctl.h>
  70 #include <linux/delay.h>
  71 #include <linux/slab.h>
  72
  73 #ifdef CONFIG_PM
  74 #include <linux/pm.h>
  75 #endif
  76
  77 #include <asm/hardware.h>
  78 #include <asm/arch/h3600.h>
  79 #include <asm/mach-types.h>
  80 #include <asm/dma.h>
  81
  82 #ifdef CONFIG_H3600_HAL
  83 #include <asm/semaphore.h>
  84 #include <asm/uaccess.h>
  85 #include <asm/arch/h3600_hal.h>
  86 #endif
  87
  88 #include <sound/core.h>
  89 #include <sound/pcm.h>
  90 #include <sound/initval.h>
  91
  92 #include <linux/l3/l3.h>
  93
  94 #undef DEBUG_MODE
  95 #undef DEBUG_FUNCTION_NAMES
  96 #include <sound/uda1341.h>
  97
  98 /*
  99  * FIXME: Is this enough as autodetection of 2.4.X-rmkY-hhZ kernels?
 100  * We use DMA stuff from 2.4.18-rmk3-hh24 here to be able to compile this
 101  * module for Familiar 0.6.1
 102  */
 103 #ifdef CONFIG_H3600_HAL
 104 #define HH_VERSION 1
 105 #endif
 106
 107 /* {{{ Type definitions */
 108
 109 MODULE_AUTHOR("Tomas Kasparek <tomas.kasparek@seznam.cz>");
 110 MODULE_LICENSE("GPL");
 111 MODULE_DESCRIPTION("SA1100/SA1111 + UDA1341TS driver for ALSA");
 112 MODULE_SUPPORTED_DEVICE("{{UDA1341,iPAQ H3600 UDA1341TS}}");
 113
 114 static char *id;        /* ID for this card */
 115
 116 module_param(id, charp, 0444);
 117 MODULE_PARM_DESC(id, "ID string for SA1100/SA1111 + UDA1341TS soundcard.");
 118
 119 struct audio_stream {
 120         char *id;               /* identification string */
 121         int stream_id;          /* numeric identification */
 122         dma_device_t dma_dev;   /* device identifier for DMA */
 123 #ifdef HH_VERSION
 124         dmach_t dmach;          /* dma channel identification */
 125 #else
 126         dma_regs_t *dma_regs;   /* points to our DMA registers */
 127 #endif
 128         int active:1;           /* we are using this stream for transfer now */
 129         int period;             /* current transfer period */
 130         int periods;            /* current count of periods registerd in the DMA engine */
 131         int tx_spin;            /* are we recoding - flag used to do DMA trans. for sync */
 132         unsigned int old_offset;
 133         spinlock_t dma_lock;    /* for locking in DMA operations (see dma-sa1100.c in the kernel) */
 134         struct snd_pcm_substream *stream;
 135 };
 136
 137 struct sa11xx_uda1341 {
 138         struct snd_card *card;
 139         struct l3_client *uda1341;
 140         struct snd_pcm *pcm;
 141         long samplerate;
 142         struct audio_stream s[2];       /* playback & capture */
 143 };
 144
 145 static unsigned int rates[] = {
 146         8000,  10666, 10985, 14647,
 147         16000, 21970, 22050, 24000,
 148         29400, 32000, 44100, 48000,
 149 };
 150
 151 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 152         .count  = ARRAY_SIZE(rates),
 153         .list   = rates,
 154         .mask   = 0,
 155 };
 156
 157 static struct platform_device *device;
 158
 159 /* }}} */
 160
 161 /* {{{ Clock and sample rate stuff */
 162
 163 /*
 164  * Stop-gap solution until rest of hh.org HAL stuff is merged.
 165  */
 166 #define GPIO_H3600_CLK_SET0             GPIO_GPIO (12)
 167 #define GPIO_H3600_CLK_SET1             GPIO_GPIO (13)
 168
 169 #ifdef CONFIG_SA1100_H3XXX
 170 #define clr_sa11xx_uda1341_egpio(x)     clr_h3600_egpio(x)
 171 #define set_sa11xx_uda1341_egpio(x)     set_h3600_egpio(x)
 172 #else
 173 #error This driver could serve H3x00 handhelds only!
 174 #endif
 175
 176 static void sa11xx_uda1341_set_audio_clock(long val)
 177 {
 178         switch (val) {
 179         case 24000: case 32000: case 48000:     /* 00: 12.288 MHz */
 180                 GPCR = GPIO_H3600_CLK_SET0 | GPIO_H3600_CLK_SET1;
 181                 break;
 182
 183         case 22050: case 29400: case 44100:     /* 01: 11.2896 MHz */
 184                 GPSR = GPIO_H3600_CLK_SET0;
 185                 GPCR = GPIO_H3600_CLK_SET1;
 186                 break;
 187
 188         case 8000: case 10666: case 16000:      /* 10: 4.096 MHz */
 189                 GPCR = GPIO_H3600_CLK_SET0;
 190                 GPSR = GPIO_H3600_CLK_SET1;
 191                 break;
 192
 193         case 10985: case 14647: case 21970:     /* 11: 5.6245 MHz */
 194                 GPSR = GPIO_H3600_CLK_SET0 | GPIO_H3600_CLK_SET1;
 195                 break;
 196         }
 197 }
 198
 199 static void sa11xx_uda1341_set_samplerate(struct sa11xx_uda1341 *sa11xx_uda1341, long rate)
 200 {
 201         int clk_div = 0;
 202         int clk=0;
 203
 204         /* We don't want to mess with clocks when frames are in flight */
 205         Ser4SSCR0 &= ~SSCR0_SSE;
 206         /* wait for any frame to complete */
 207         udelay(125);
 208
 209         /*
 210          * We have the following clock sources:
 211          * 4.096 MHz, 5.6245 MHz, 11.2896 MHz, 12.288 MHz
 212          * Those can be divided either by 256, 384 or 512.
 213          * This makes up 12 combinations for the following samplerates...
 214          */
 215         if (rate >= 48000)
 216                 rate = 48000;
 217         else if (rate >= 44100)
 218                 rate = 44100;
 219         else if (rate >= 32000)
 220                 rate = 32000;
 221         else if (rate >= 29400)
 222                 rate = 29400;
 223         else if (rate >= 24000)
 224                 rate = 24000;
 225         else if (rate >= 22050)
 226                 rate = 22050;
 227         else if (rate >= 21970)
 228                 rate = 21970;
 229         else if (rate >= 16000)
 230                 rate = 16000;
 231         else if (rate >= 14647)
 232                 rate = 14647;
 233         else if (rate >= 10985)
 234                 rate = 10985;
 235         else if (rate >= 10666)
 236                 rate = 10666;
 237         else
 238                 rate = 8000;
 239
 240         /* Set the external clock generator */
 241 #ifdef CONFIG_H3600_HAL
 242         h3600_audio_clock(rate);
 243 #else
 244         sa11xx_uda1341_set_audio_clock(rate);
 245 #endif
 246
 247         /* Select the clock divisor */
 248         switch (rate) {
 249         case 8000:
 250         case 10985:
 251         case 22050:
 252         case 24000:
 253                 clk = F512;
 254                 clk_div = SSCR0_SerClkDiv(16);
 255                 break;
 256         case 16000:
 257         case 21970:
 258         case 44100:
 259         case 48000:
 260                 clk = F256;
 261                 clk_div = SSCR0_SerClkDiv(8);
 262                 break;
 263         case 10666:
 264         case 14647:
 265         case 29400:
 266         case 32000:
 267                 clk = F384;
 268                 clk_div = SSCR0_SerClkDiv(12);
 269                 break;
 270         }
 271
 272         /* FMT setting should be moved away when other FMTs are added (FIXME) */
 273         l3_command(sa11xx_uda1341->uda1341, CMD_FORMAT, (void *)LSB16);
 274
 275         l3_command(sa11xx_uda1341->uda1341, CMD_FS, (void *)clk);
 276         Ser4SSCR0 = (Ser4SSCR0 & ~0xff00) + clk_div + SSCR0_SSE;
 277         sa11xx_uda1341->samplerate = rate;
 278 }
 279
 280 /* }}} */
 281
 282 /* {{{ HW init and shutdown */
 283
 284 static void sa11xx_uda1341_audio_init(struct sa11xx_uda1341 *sa11xx_uda1341)
 285 {
 286         unsigned long flags;
 287
 288         /* Setup DMA stuff */
 289         sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK].id = "UDA1341 out";
 290         sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK].stream_id = SNDRV_PCM_STREAM_PLAYBACK;
 291         sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK].dma_dev = DMA_Ser4SSPWr;
 292
 293         sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE].id = "UDA1341 in";
 294         sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE].stream_id = SNDRV_PCM_STREAM_CAPTURE;
 295         sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE].dma_dev = DMA_Ser4SSPRd;
 296
 297         /* Initialize the UDA1341 internal state */
 298
 299         /* Setup the uarts */
 300         local_irq_save(flags);
 301         GAFR |= (GPIO_SSP_CLK);
 302         GPDR &= ~(GPIO_SSP_CLK);
 303         Ser4SSCR0 = 0;
 304         Ser4SSCR0 = SSCR0_DataSize(16) + SSCR0_TI + SSCR0_SerClkDiv(8);
 305         Ser4SSCR1 = SSCR1_SClkIactL + SSCR1_SClk1P + SSCR1_ExtClk;
 306         Ser4SSCR0 |= SSCR0_SSE;
 307         local_irq_restore(flags);
 308
 309         /* Enable the audio power */
 310 #ifdef CONFIG_H3600_HAL
 311         h3600_audio_power(AUDIO_RATE_DEFAULT);
 312 #else
 313         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_CODEC_NRESET);
 314         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_AUDIO_ON);
 315         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 316 #endif
 317
 318         /* Wait for the UDA1341 to wake up */
 319         mdelay(1); //FIXME - was removed by Perex - Why?
 320
 321         /* Initialize the UDA1341 internal state */
 322         l3_open(sa11xx_uda1341->uda1341);
 323
 324         /* external clock configuration (after l3_open - regs must be initialized */
 325         sa11xx_uda1341_set_samplerate(sa11xx_uda1341, sa11xx_uda1341->samplerate);
 326
 327         /* Wait for the UDA1341 to wake up */
 328         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_CODEC_NRESET);
 329         mdelay(1);
 330
 331         /* make the left and right channels unswapped (flip the WS latch) */
 332         Ser4SSDR = 0;
 333
 334 #ifdef CONFIG_H3600_HAL
 335         h3600_audio_mute(0);
 336 #else
 337         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 338 #endif
 339 }
 340
 341 static void sa11xx_uda1341_audio_shutdown(struct sa11xx_uda1341 *sa11xx_uda1341)
 342 {
 343         /* mute on */
 344 #ifdef CONFIG_H3600_HAL
 345         h3600_audio_mute(1);
 346 #else
 347         set_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 348 #endif
 349
 350         /* disable the audio power and all signals leading to the audio chip */
 351         l3_close(sa11xx_uda1341->uda1341);
 352         Ser4SSCR0 = 0;
 353         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_CODEC_NRESET);
 354
 355         /* power off and mute off */
 356         /* FIXME - is muting off necesary??? */
 357 #ifdef CONFIG_H3600_HAL
 358         h3600_audio_power(0);
 359         h3600_audio_mute(0);
 360 #else
 361         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_AUDIO_ON);
 362         clr_sa11xx_uda1341_egpio(IPAQ_EGPIO_QMUTE);
 363 #endif
 364 }
 365
 366 /* }}} */
 367
 368 /* {{{ DMA staff */
 369
 370 /*
 371  * these are the address and sizes used to fill the xmit buffer
 372  * so we can get a clock in record only mode
 373  */
 374 #define FORCE_CLOCK_ADDR                (dma_addr_t)FLUSH_BASE_PHYS
 375 #define FORCE_CLOCK_SIZE                4096 // was 2048
 376
 377 // FIXME Why this value exactly - wrote comment
 378 #define DMA_BUF_SIZE    8176    /* <= MAX_DMA_SIZE from asm/arch-sa1100/dma.h */
 379
 380 #ifdef HH_VERSION
 381
 382 static int audio_dma_request(struct audio_stream *s, void (*callback)(void *, int))
 383 {
 384         int ret;
 385
 386         ret = sa1100_request_dma(&s->dmach, s->id, s->dma_dev);
 387         if (ret < 0) {
 388                 printk(KERN_ERR "unable to grab audio dma 0x%x\n", s->dma_dev);
 389                 return ret;
 390         }
 391         sa1100_dma_set_callback(s->dmach, callback);
 392         return 0;
 393 }
 394
 395 static inline void audio_dma_free(struct audio_stream *s)
 396 {
 397         sa1100_free_dma(s->dmach);
 398         s->dmach = -1;
 399 }
 400
 401 #else
 402
 403 static int audio_dma_request(struct audio_stream *s, void (*callback)(void *))
 404 {
 405         int ret;
 406
 407         ret = sa1100_request_dma(s->dma_dev, s->id, callback, s, &s->dma_regs);
 408         if (ret < 0)
 409                 printk(KERN_ERR "unable to grab audio dma 0x%x\n", s->dma_dev);
 410         return ret;
 411 }
 412
 413 static void audio_dma_free(struct audio_stream *s)
 414 {
 415         sa1100_free_dma(s->dma_regs);
 416         s->dma_regs = 0;
 417 }
 418
 419 #endif
 420
 421 static u_int audio_get_dma_pos(struct audio_stream *s)
 422 {
 423         struct snd_pcm_substream *substream = s->stream;
 424         struct snd_pcm_runtime *runtime = substream->runtime;
 425         unsigned int offset;
 426         unsigned long flags;
 427         dma_addr_t addr;
 428
 429         // this must be called w/ interrupts locked out see dma-sa1100.c in the kernel
 430         spin_lock_irqsave(&s->dma_lock, flags);
 431 #ifdef HH_VERSION
 432         sa1100_dma_get_current(s->dmach, NULL, &addr);
 433 #else
 434         addr = sa1100_get_dma_pos((s)->dma_regs);
 435 #endif
 436         offset = addr - runtime->dma_addr;
 437         spin_unlock_irqrestore(&s->dma_lock, flags);
 438
 439         offset = bytes_to_frames(runtime,offset);
 440         if (offset >= runtime->buffer_size)
 441                 offset = 0;
 442
 443         return offset;
 444 }
 445
 446 /*
 447  * this stops the dma and clears the dma ptrs
 448  */
 449 static void audio_stop_dma(struct audio_stream *s)
 450 {
 451         unsigned long flags;
 452
 453         spin_lock_irqsave(&s->dma_lock, flags);
 454         s->active = 0;
 455         s->period = 0;
 456         /* this stops the dma channel and clears the buffer ptrs */
 457 #ifdef HH_VERSION
 458         sa1100_dma_flush_all(s->dmach);
 459 #else
 460         sa1100_clear_dma(s->dma_regs);
 461 #endif
 462         spin_unlock_irqrestore(&s->dma_lock, flags);
 463 }
 464
 465 static void audio_process_dma(struct audio_stream *s)
 466 {
 467         struct snd_pcm_substream *substream = s->stream;
 468         struct snd_pcm_runtime *runtime;
 469         unsigned int dma_size;
 470         unsigned int offset;
 471         int ret;
 472
 473         /* we are requested to process synchronization DMA transfer */
 474         if (s->tx_spin) {
 475                 snd_assert(s->stream_id == SNDRV_PCM_STREAM_PLAYBACK, return);
 476                 /* fill the xmit dma buffers and return */
 477 #ifdef HH_VERSION
 478                 sa1100_dma_set_spin(s->dmach, FORCE_CLOCK_ADDR, FORCE_CLOCK_SIZE);
 479 #else
 480                 while (1) {
 481                         ret = sa1100_start_dma(s->dma_regs, FORCE_CLOCK_ADDR, FORCE_CLOCK_SIZE);
 482                         if (ret)
 483                                 return;
 484                 }
 485 #endif
 486                 return;
 487         }
 488
 489         /* must be set here - only valid for running streams, not for forced_clock dma fills  */
 490         runtime = substream->runtime;
 491         while (s->active && s->periods < runtime->periods) {
 492                 dma_size = frames_to_bytes(runtime, runtime->period_size);
 493                 if (s->old_offset) {
 494                         /* a little trick, we need resume from old position */
 495                         offset = frames_to_bytes(runtime, s->old_offset - 1);
 496                         s->old_offset = 0;
 497                         s->periods = 0;
 498                         s->period = offset / dma_size;
 499                         offset %= dma_size;
 500                         dma_size = dma_size - offset;
 501                         if (!dma_size)
 502                                 continue;               /* special case */
 503                 } else {
 504                         offset = dma_size * s->period;
 505                         snd_assert(dma_size <= DMA_BUF_SIZE, );
 506                 }
 507 #ifdef HH_VERSION
 508                 ret = sa1100_dma_queue_buffer(s->dmach, s, runtime->dma_addr + offset, dma_size);
 509                 if (ret)
 510                         return; //FIXME
 511 #else
 512                 ret = sa1100_start_dma((s)->dma_regs, runtime->dma_addr + offset, dma_size);
 513                 if (ret) {
 514                         printk(KERN_ERR "audio_process_dma: cannot queue DMA buffer (%i)\n", ret);
 515                         return;
 516                 }
 517 #endif
 518
 519                 s->period++;
 520                 s->period %= runtime->periods;
 521                 s->periods++;
 522         }
 523 }
 524
 525 #ifdef HH_VERSION
 526 static void audio_dma_callback(void *data, int size)
 527 #else
 528 static void audio_dma_callback(void *data)
 529 #endif
 530 {
 531         struct audio_stream *s = data;
 532
 533         /*
 534          * If we are getting a callback for an active stream then we inform
 535          * the PCM middle layer we've finished a period
 536          */
 537         if (s->active)
 538                 snd_pcm_period_elapsed(s->stream);
 539
 540         spin_lock(&s->dma_lock);
 541         if (!s->tx_spin && s->periods > 0)
 542                 s->periods--;
 543         audio_process_dma(s);
 544         spin_unlock(&s->dma_lock);
 545 }
 546
 547 /* }}} */
 548
 549 /* {{{ PCM setting */
 550
 551 /* {{{ trigger & timer */
 552
 553 static int snd_sa11xx_uda1341_trigger(struct snd_pcm_substream *substream, int cmd)
 554 {
 555         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 556         int stream_id = substream->pstr->stream;
 557         struct audio_stream *s = &chip->s[stream_id];
 558         struct audio_stream *s1 = &chip->s[stream_id ^ 1];
 559         int err = 0;
 560
 561         /* note local interrupts are already disabled in the midlevel code */
 562         spin_lock(&s->dma_lock);
 563         switch (cmd) {
 564         case SNDRV_PCM_TRIGGER_START:
 565                 /* now we need to make sure a record only stream has a clock */
 566                 if (stream_id == SNDRV_PCM_STREAM_CAPTURE && !s1->active) {
 567                         /* we need to force fill the xmit DMA with zeros */
 568                         s1->tx_spin = 1;
 569                         audio_process_dma(s1);
 570                 }
 571                 /* this case is when you were recording then you turn on a
 572                  * playback stream so we stop (also clears it) the dma first,
 573                  * clear the sync flag and then we let it turned on
 574                  */
 575                 else {
 576                         s->tx_spin = 0;
 577                 }
 578
 579                 /* requested stream startup */
 580                 s->active = 1;
 581                 audio_process_dma(s);
 582                 break;
 583         case SNDRV_PCM_TRIGGER_STOP:
 584                 /* requested stream shutdown */
 585                 audio_stop_dma(s);
 586
 587                 /*
 588                  * now we need to make sure a record only stream has a clock
 589                  * so if we're stopping a playback with an active capture
 590                  * we need to turn the 0 fill dma on for the xmit side
 591                  */
 592                 if (stream_id == SNDRV_PCM_STREAM_PLAYBACK && s1->active) {
 593                         /* we need to force fill the xmit DMA with zeros */
 594                         s->tx_spin = 1;
 595                         audio_process_dma(s);
 596                 }
 597                 /*
 598                  * we killed a capture only stream, so we should also kill
 599                  * the zero fill transmit
 600                  */
 601                 else {
 602                         if (s1->tx_spin) {
 603                                 s1->tx_spin = 0;
 604                                 audio_stop_dma(s1);
 605                         }
 606                 }
 607
 608                 break;
 609         case SNDRV_PCM_TRIGGER_SUSPEND:
 610                 s->active = 0;
 611 #ifdef HH_VERSION
 612                 sa1100_dma_stop(s->dmach);
 613 #else
 614                 //FIXME - DMA API
 615 #endif
 616                 s->old_offset = audio_get_dma_pos(s) + 1;
 617 #ifdef HH_VERSION
 618                 sa1100_dma_flush_all(s->dmach);
 619 #else
 620                 //FIXME - DMA API
 621 #endif
 622                 s->periods = 0;
 623                 break;
 624         case SNDRV_PCM_TRIGGER_RESUME:
 625                 s->active = 1;
 626                 s->tx_spin = 0;
 627                 audio_process_dma(s);
 628                 if (stream_id == SNDRV_PCM_STREAM_CAPTURE && !s1->active) {
 629                         s1->tx_spin = 1;
 630                         audio_process_dma(s1);
 631                 }
 632                 break;
 633         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 634 #ifdef HH_VERSION
 635                 sa1100_dma_stop(s->dmach);
 636 #else
 637                 //FIXME - DMA API
 638 #endif
 639                 s->active = 0;
 640                 if (stream_id == SNDRV_PCM_STREAM_PLAYBACK) {
 641                         if (s1->active) {
 642                                 s->tx_spin = 1;
 643                                 s->old_offset = audio_get_dma_pos(s) + 1;
 644 #ifdef HH_VERSION
 645                                 sa1100_dma_flush_all(s->dmach);
 646 #else
 647                                 //FIXME - DMA API
 648 #endif
 649                                 audio_process_dma(s);
 650                         }
 651                 } else {
 652                         if (s1->tx_spin) {
 653                                 s1->tx_spin = 0;
 654 #ifdef HH_VERSION
 655                                 sa1100_dma_flush_all(s1->dmach);
 656 #else
 657                                 //FIXME - DMA API
 658 #endif
 659                         }
 660                 }
 661                 break;
 662         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 663                 s->active = 1;
 664                 if (s->old_offset) {
 665                         s->tx_spin = 0;
 666                         audio_process_dma(s);
 667                         break;
 668                 }
 669                 if (stream_id == SNDRV_PCM_STREAM_CAPTURE && !s1->active) {
 670                         s1->tx_spin = 1;
 671                         audio_process_dma(s1);
 672                 }
 673 #ifdef HH_VERSION
 674                 sa1100_dma_resume(s->dmach);
 675 #else
 676                 //FIXME - DMA API
 677 #endif
 678                 break;
 679         default:
 680                 err = -EINVAL;
 681                 break;
 682         }
 683         spin_unlock(&s->dma_lock);
 684         return err;
 685 }
 686
 687 static int snd_sa11xx_uda1341_prepare(struct snd_pcm_substream *substream)
 688 {
 689         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 690         struct snd_pcm_runtime *runtime = substream->runtime;
 691         struct audio_stream *s = &chip->s[substream->pstr->stream];
 692
 693         /* set requested samplerate */
 694         sa11xx_uda1341_set_samplerate(chip, runtime->rate);
 695
 696         /* set requestd format when available */
 697         /* set FMT here !!! FIXME */
 698
 699         s->period = 0;
 700         s->periods = 0;
 701
 702         return 0;
 703 }
 704
 705 static snd_pcm_uframes_t snd_sa11xx_uda1341_pointer(struct snd_pcm_substream *substream)
 706 {
 707         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 708         return audio_get_dma_pos(&chip->s[substream->pstr->stream]);
 709 }
 710
 711 /* }}} */
 712
 713 static struct snd_pcm_hardware snd_sa11xx_uda1341_capture =
 714 {
 715         .info                   = (SNDRV_PCM_INFO_INTERLEAVED |
 716                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
 717                                    SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
 718                                    SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
 719         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
 720         .rates                  = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
 721                                    SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |\
 722                                    SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 723                                    SNDRV_PCM_RATE_KNOT),
 724         .rate_min               = 8000,
 725         .rate_max               = 48000,
 726         .channels_min           = 2,
 727         .channels_max           = 2,
 728         .buffer_bytes_max       = 64*1024,
 729         .period_bytes_min       = 64,
 730         .period_bytes_max       = DMA_BUF_SIZE,
 731         .periods_min            = 2,
 732         .periods_max            = 255,
 733         .fifo_size              = 0,
 734 };
 735
 736 static struct snd_pcm_hardware snd_sa11xx_uda1341_playback =
 737 {
 738         .info                   = (SNDRV_PCM_INFO_INTERLEAVED |
 739                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
 740                                    SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
 741                                    SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
 742         .formats                = SNDRV_PCM_FMTBIT_S16_LE,
 743         .rates                  = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
 744                                    SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |\
 745                                    SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 746                                    SNDRV_PCM_RATE_KNOT),
 747         .rate_min               = 8000,
 748         .rate_max               = 48000,
 749         .channels_min           = 2,
 750         .channels_max           = 2,
 751         .buffer_bytes_max       = 64*1024,
 752         .period_bytes_min       = 64,
 753         .period_bytes_max       = DMA_BUF_SIZE,
 754         .periods_min            = 2,
 755         .periods_max            = 255,
 756         .fifo_size              = 0,
 757 };
 758
 759 static int snd_card_sa11xx_uda1341_open(struct snd_pcm_substream *substream)
 760 {
 761         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 762         struct snd_pcm_runtime *runtime = substream->runtime;
 763         int stream_id = substream->pstr->stream;
 764         int err;
 765
 766         chip->s[stream_id].stream = substream;
 767
 768         if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
 769                 runtime->hw = snd_sa11xx_uda1341_playback;
 770         else
 771                 runtime->hw = snd_sa11xx_uda1341_capture;
 772         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 773                 return err;
 774         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 775                 return err;
 776
 777         return 0;
 778 }
 779
 780 static int snd_card_sa11xx_uda1341_close(struct snd_pcm_substream *substream)
 781 {
 782         struct sa11xx_uda1341 *chip = snd_pcm_substream_chip(substream);
 783
 784         chip->s[substream->pstr->stream].stream = NULL;
 785         return 0;
 786 }
 787
 788 /* {{{ HW params & free */
 789
 790 static int snd_sa11xx_uda1341_hw_params(struct snd_pcm_substream *substream,
 791                                         struct snd_pcm_hw_params *hw_params)
 792 {
 793
 794         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 795 }
 796
 797 static int snd_sa11xx_uda1341_hw_free(struct snd_pcm_substream *substream)
 798 {
 799         return snd_pcm_lib_free_pages(substream);
 800 }
 801
 802 /* }}} */
 803
 804 static struct snd_pcm_ops snd_card_sa11xx_uda1341_playback_ops = {
 805         .open                   = snd_card_sa11xx_uda1341_open,
 806         .close                  = snd_card_sa11xx_uda1341_close,
 807         .ioctl                  = snd_pcm_lib_ioctl,
 808         .hw_params              = snd_sa11xx_uda1341_hw_params,
 809         .hw_free                = snd_sa11xx_uda1341_hw_free,
 810         .prepare                = snd_sa11xx_uda1341_prepare,
 811         .trigger                = snd_sa11xx_uda1341_trigger,
 812         .pointer                = snd_sa11xx_uda1341_pointer,
 813 };
 814
 815 static struct snd_pcm_ops snd_card_sa11xx_uda1341_capture_ops = {
 816         .open                   = snd_card_sa11xx_uda1341_open,
 817         .close                  = snd_card_sa11xx_uda1341_close,
 818         .ioctl                  = snd_pcm_lib_ioctl,
 819         .hw_params              = snd_sa11xx_uda1341_hw_params,
 820         .hw_free                = snd_sa11xx_uda1341_hw_free,
 821         .prepare                = snd_sa11xx_uda1341_prepare,
 822         .trigger                = snd_sa11xx_uda1341_trigger,
 823         .pointer                = snd_sa11xx_uda1341_pointer,
 824 };
 825
 826 static int __init snd_card_sa11xx_uda1341_pcm(struct sa11xx_uda1341 *sa11xx_uda1341, int device)
 827 {
 828         struct snd_pcm *pcm;
 829         int err;
 830
 831         if ((err = snd_pcm_new(sa11xx_uda1341->card, "UDA1341 PCM", device, 1, 1, &pcm)) < 0)
 832                 return err;
 833
 834         /*
 835          * this sets up our initial buffers and sets the dma_type to isa.
 836          * isa works but I'm not sure why (or if) it's the right choice
 837          * this may be too large, trying it for now
 838          */
 839         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 840                                               snd_dma_isa_data(),
 841                                               64*1024, 64*1024);
 842
 843         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_sa11xx_uda1341_playback_ops);
 844         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_sa11xx_uda1341_capture_ops);
 845         pcm->private_data = sa11xx_uda1341;
 846         pcm->info_flags = 0;
 847         strcpy(pcm->name, "UDA1341 PCM");
 848
 849         sa11xx_uda1341_audio_init(sa11xx_uda1341);
 850
 851         /* setup DMA controller */
 852         audio_dma_request(&sa11xx_uda1341->s[SNDRV_PCM_STREAM_PLAYBACK], audio_dma_callback);
 853         audio_dma_request(&sa11xx_uda1341->s[SNDRV_PCM_STREAM_CAPTURE], audio_dma_callback);
 854
 855         sa11xx_uda1341->pcm = pcm;
 856
 857         return 0;
 858 }
 859
 860 /* }}} */
 861
 862 /* {{{ module init & exit */
 863
 864 #ifdef CONFIG_PM
 865
 866 static int snd_sa11xx_uda1341_suspend(struct platform_device *devptr,
 867                                       pm_message_t state)
 868 {
 869         struct snd_card *card = platform_get_drvdata(devptr);
 870         struct sa11xx_uda1341 *chip = card->private_data;
 871
 872         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 873         snd_pcm_suspend_all(chip->pcm);
 874 #ifdef HH_VERSION
 875         sa1100_dma_sleep(chip->s[SNDRV_PCM_STREAM_PLAYBACK].dmach);
 876         sa1100_dma_sleep(chip->s[SNDRV_PCM_STREAM_CAPTURE].dmach);
 877 #else
 878         //FIXME
 879 #endif
 880         l3_command(chip->uda1341, CMD_SUSPEND, NULL);
 881         sa11xx_uda1341_audio_shutdown(chip);
 882
 883         return 0;
 884 }
 885
 886 static int snd_sa11xx_uda1341_resume(struct platform_device *devptr)
 887 {
 888         struct snd_card *card = platform_get_drvdata(devptr);
 889         struct sa11xx_uda1341 *chip = card->private_data;
 890
 891         sa11xx_uda1341_audio_init(chip);
 892         l3_command(chip->uda1341, CMD_RESUME, NULL);
 893 #ifdef HH_VERSION
 894         sa1100_dma_wakeup(chip->s[SNDRV_PCM_STREAM_PLAYBACK].dmach);
 895         sa1100_dma_wakeup(chip->s[SNDRV_PCM_STREAM_CAPTURE].dmach);
 896 #else
 897         //FIXME
 898 #endif
 899         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 900         return 0;
 901 }
 902 #endif /* COMFIG_PM */
 903
 904 void snd_sa11xx_uda1341_free(struct snd_card *card)
 905 {
 906         struct sa11xx_uda1341 *chip = card->private_data;
 907
 908         audio_dma_free(&chip->s[SNDRV_PCM_STREAM_PLAYBACK]);
 909         audio_dma_free(&chip->s[SNDRV_PCM_STREAM_CAPTURE]);
 910 }
 911
 912 static int __init sa11xx_uda1341_probe(struct platform_device *devptr)
 913 {
 914         int err;
 915         struct snd_card *card;
 916         struct sa11xx_uda1341 *chip;
 917
 918         /* register the soundcard */
 919         card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct sa11xx_uda1341));
 920         if (card == NULL)
 921                 return -ENOMEM;
 922
 923         chip = card->private_data;
 924         spin_lock_init(&chip->s[0].dma_lock);
 925         spin_lock_init(&chip->s[1].dma_lock);
 926
 927         card->private_free = snd_sa11xx_uda1341_free;
 928         chip->card = card;
 929         chip->samplerate = AUDIO_RATE_DEFAULT;
 930
 931         // mixer
 932         if ((err = snd_chip_uda1341_mixer_new(card, &chip->uda1341)))
 933                 goto nodev;
 934
 935         // PCM
 936         if ((err = snd_card_sa11xx_uda1341_pcm(chip, 0)) < 0)
 937                 goto nodev;
 938
 939         strcpy(card->driver, "UDA1341");
 940         strcpy(card->shortname, "H3600 UDA1341TS");
 941         sprintf(card->longname, "Compaq iPAQ H3600 with Philips UDA1341TS");
 942
 943         snd_card_set_dev(card, &devptr->dev);
 944
 945         if ((err = snd_card_register(card)) == 0) {
 946                 printk( KERN_INFO "iPAQ audio support initialized\n" );
 947                 platform_set_drvdata(devptr, card);
 948                 return 0;
 949         }
 950
 951  nodev:
 952         snd_card_free(card);
 953         return err;
 954 }
 955
 956 static int __devexit sa11xx_uda1341_remove(struct platform_device *devptr)
 957 {
 958         snd_card_free(platform_get_drvdata(devptr));
 959         platform_set_drvdata(devptr, NULL);
 960         return 0;
 961 }
 962
 963 #define SA11XX_UDA1341_DRIVER   "sa11xx_uda1341"
 964
 965 static struct platform_driver sa11xx_uda1341_driver = {
 966         .probe          = sa11xx_uda1341_probe,
 967         .remove         = __devexit_p(sa11xx_uda1341_remove),
 968 #ifdef CONFIG_PM
 969         .suspend        = snd_sa11xx_uda1341_suspend,
 970         .resume         = snd_sa11xx_uda1341_resume,
 971 #endif
 972         .driver         = {
 973                 .name   = SA11XX_UDA1341_DRIVER,
 974         },
 975 };
 976
 977 static int __init sa11xx_uda1341_init(void)
 978 {
 979         int err;
 980
 981         if (!machine_is_h3xxx())
 982                 return -ENODEV;
 983         if ((err = platform_driver_register(&sa11xx_uda1341_driver)) < 0)
 984                 return err;
 985         device = platform_device_register_simple(SA11XX_UDA1341_DRIVER, -1, NULL, 0);
 986         if (!IS_ERR(device)) {
 987                 if (platform_get_drvdata(device))
 988                         return 0;
 989                 platform_device_unregister(device);
 990                 err = -ENODEV
 991         } else
 992                 err = PTR_ERR(device);
 993         platform_driver_unregister(&sa11xx_uda1341_driver);
 994         return err;
 995 }
 996
 997 static void __exit sa11xx_uda1341_exit(void)
 998 {
 999         platform_device_unregister(device);
1000         platform_driver_unregister(&sa11xx_uda1341_driver);
1001 }
1002
1003 module_init(sa11xx_uda1341_init);
1004 module_exit(sa11xx_uda1341_exit);
1005
1006 /* }}} */
1007
1008 /*
1009  * Local variables:
1010  * indent-tabs-mode: t
1011  * End:
1012  */