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