sound/pci/aw2/aw2-saa7146.c

   1 /*****************************************************************************
   2  *
   3  * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
   4  * Jean-Christian Hassler <jhassler@free.fr>
   5  *
   6  * This file is part of the Audiowerk2 ALSA driver
   7  *
   8  * The Audiowerk2 ALSA driver is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2.
  11  *
  12  * The Audiowerk2 ALSA driver is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with the Audiowerk2 ALSA driver; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  20  * USA.
  21  *
  22  *****************************************************************************/
  23
  24 #define AW2_SAA7146_M
  25
  26 #include <linux/init.h>
  27 #include <linux/pci.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/delay.h>
  30 #include <asm/io.h>
  31 #include <sound/core.h>
  32 #include <sound/initval.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35
  36 #include "saa7146.h"
  37 #include "aw2-saa7146.h"
  38
  39 #include "aw2-tsl.c"
  40
  41 #define WRITEREG(value, addr) writel((value), chip->base_addr + (addr))
  42 #define READREG(addr) readl(chip->base_addr + (addr))
  43
  44 static struct snd_aw2_saa7146_cb_param
  45  arr_substream_it_playback_cb[NB_STREAM_PLAYBACK];
  46 static struct snd_aw2_saa7146_cb_param
  47  arr_substream_it_capture_cb[NB_STREAM_CAPTURE];
  48
  49 static int snd_aw2_saa7146_get_limit(int size);
  50
  51 /* chip-specific destructor */
  52 int snd_aw2_saa7146_free(struct snd_aw2_saa7146 *chip)
  53 {
  54         /* disable all irqs */
  55         WRITEREG(0, IER);
  56
  57         /* reset saa7146 */
  58         WRITEREG((MRST_N << 16), MC1);
  59
  60         /* Unset base addr */
  61         chip->base_addr = NULL;
  62
  63         return 0;
  64 }
  65
  66 void snd_aw2_saa7146_setup(struct snd_aw2_saa7146 *chip,
  67                            void __iomem *pci_base_addr)
  68 {
  69         /* set PCI burst/threshold
  70
  71            Burst length definition
  72            VALUE    BURST LENGTH
  73            000      1 Dword
  74            001      2 Dwords
  75            010      4 Dwords
  76            011      8 Dwords
  77            100      16 Dwords
  78            101      32 Dwords
  79            110      64 Dwords
  80            111      128 Dwords
  81
  82            Threshold definition
  83            VALUE    WRITE MODE              READ MODE
  84            00       1 Dword of valid data   1 empty Dword
  85            01       4 Dwords of valid data  4 empty Dwords
  86            10       8 Dwords of valid data  8 empty Dwords
  87            11       16 Dwords of valid data 16 empty Dwords */
  88
  89         unsigned int acon2;
  90         unsigned int acon1 = 0;
  91         int i;
  92
  93         /* Set base addr */
  94         chip->base_addr = pci_base_addr;
  95
  96         /* disable all irqs */
  97         WRITEREG(0, IER);
  98
  99         /* reset saa7146 */
 100         WRITEREG((MRST_N << 16), MC1);
 101
 102         /* enable audio interface */
 103 #ifdef __BIG_ENDIAN
 104         acon1 |= A1_SWAP;
 105         acon1 |= A2_SWAP;
 106 #endif
 107         /* WS0_CTRL, WS0_SYNC: input TSL1, I2S */
 108
 109         /* At initialization WS1 and WS2 are disabled (configured as input) */
 110         acon1 |= 0 * WS1_CTRL;
 111         acon1 |= 0 * WS2_CTRL;
 112
 113         /* WS4 is not used. So it must not restart A2.
 114            This is why it is configured as output (force to low) */
 115         acon1 |= 3 * WS4_CTRL;
 116
 117         /* WS3_CTRL, WS3_SYNC: output TSL2, I2S */
 118         acon1 |= 2 * WS3_CTRL;
 119
 120         /* A1 and A2 are active and asynchronous */
 121         acon1 |= 3 * AUDIO_MODE;
 122         WRITEREG(acon1, ACON1);
 123
 124         /* The following comes from original windows driver.
 125            It is needed to have a correct behavior of input and output
 126            simultenously, but I don't know why ! */
 127         WRITEREG(3 * (BurstA1_in) + 3 * (ThreshA1_in) +
 128                  3 * (BurstA1_out) + 3 * (ThreshA1_out) +
 129                  3 * (BurstA2_out) + 3 * (ThreshA2_out), PCI_BT_A);
 130
 131         /* enable audio port pins */
 132         WRITEREG((EAP << 16) | EAP, MC1);
 133
 134         /* enable I2C */
 135         WRITEREG((EI2C << 16) | EI2C, MC1);
 136         /* enable interrupts */
 137         WRITEREG(A1_out | A2_out | A1_in | IIC_S | IIC_E, IER);
 138
 139         /* audio configuration */
 140         acon2 = A2_CLKSRC | BCLK1_OEN;
 141         WRITEREG(acon2, ACON2);
 142
 143         /* By default use analog input */
 144         snd_aw2_saa7146_use_digital_input(chip, 0);
 145
 146         /* TSL setup */
 147         for (i = 0; i < 8; ++i) {
 148                 WRITEREG(tsl1[i], TSL1 + (i * 4));
 149                 WRITEREG(tsl2[i], TSL2 + (i * 4));
 150         }
 151
 152 }
 153
 154 void snd_aw2_saa7146_pcm_init_playback(struct snd_aw2_saa7146 *chip,
 155                                        int stream_number,
 156                                        unsigned long dma_addr,
 157                                        unsigned long period_size,
 158                                        unsigned long buffer_size)
 159 {
 160         unsigned long dw_page, dw_limit;
 161
 162         /* Configure DMA for substream
 163            Configuration informations: ALSA has allocated continuous memory
 164            pages. So we don't need to use MMU of saa7146.
 165          */
 166
 167         /* No MMU -> nothing to do with PageA1, we only configure the limit of
 168            PageAx_out register */
 169         /* Disable MMU */
 170         dw_page = (0L << 11);
 171
 172         /* Configure Limit for DMA access.
 173            The limit register defines an address limit, which generates
 174            an interrupt if passed by the actual PCI address pointer.
 175            '0001' means an interrupt will be generated if the lower
 176            6 bits (64 bytes) of the PCI address are zero. '0010'
 177            defines a limit of 128 bytes, '0011' one of 256 bytes, and
 178            so on up to 1 Mbyte defined by '1111'. This interrupt range
 179            can be calculated as follows:
 180            Range = 2^(5 + Limit) bytes.
 181          */
 182         dw_limit = snd_aw2_saa7146_get_limit(period_size);
 183         dw_page |= (dw_limit << 4);
 184
 185         if (stream_number == 0) {
 186                 WRITEREG(dw_page, PageA2_out);
 187
 188                 /* Base address for DMA transfert. */
 189                 /* This address has been reserved by ALSA. */
 190                 /* This is a physical address */
 191                 WRITEREG(dma_addr, BaseA2_out);
 192
 193                 /* Define upper limit for DMA access */
 194                 WRITEREG(dma_addr + buffer_size, ProtA2_out);
 195
 196         } else if (stream_number == 1) {
 197                 WRITEREG(dw_page, PageA1_out);
 198
 199                 /* Base address for DMA transfert. */
 200                 /* This address has been reserved by ALSA. */
 201                 /* This is a physical address */
 202                 WRITEREG(dma_addr, BaseA1_out);
 203
 204                 /* Define upper limit for DMA access */
 205                 WRITEREG(dma_addr + buffer_size, ProtA1_out);
 206         } else {
 207                 pr_err("aw2: snd_aw2_saa7146_pcm_init_playback: "
 208                        "Substream number is not 0 or 1 -> not managed\n");
 209         }
 210 }
 211
 212 void snd_aw2_saa7146_pcm_init_capture(struct snd_aw2_saa7146 *chip,
 213                                       int stream_number, unsigned long dma_addr,
 214                                       unsigned long period_size,
 215                                       unsigned long buffer_size)
 216 {
 217         unsigned long dw_page, dw_limit;
 218
 219         /* Configure DMA for substream
 220            Configuration informations: ALSA has allocated continuous memory
 221            pages. So we don't need to use MMU of saa7146.
 222          */
 223
 224         /* No MMU -> nothing to do with PageA1, we only configure the limit of
 225            PageAx_out register */
 226         /* Disable MMU */
 227         dw_page = (0L << 11);
 228
 229         /* Configure Limit for DMA access.
 230            The limit register defines an address limit, which generates
 231            an interrupt if passed by the actual PCI address pointer.
 232            '0001' means an interrupt will be generated if the lower
 233            6 bits (64 bytes) of the PCI address are zero. '0010'
 234            defines a limit of 128 bytes, '0011' one of 256 bytes, and
 235            so on up to 1 Mbyte defined by '1111'. This interrupt range
 236            can be calculated as follows:
 237            Range = 2^(5 + Limit) bytes.
 238          */
 239         dw_limit = snd_aw2_saa7146_get_limit(period_size);
 240         dw_page |= (dw_limit << 4);
 241
 242         if (stream_number == 0) {
 243                 WRITEREG(dw_page, PageA1_in);
 244
 245                 /* Base address for DMA transfert. */
 246                 /* This address has been reserved by ALSA. */
 247                 /* This is a physical address */
 248                 WRITEREG(dma_addr, BaseA1_in);
 249
 250                 /* Define upper limit for DMA access  */
 251                 WRITEREG(dma_addr + buffer_size, ProtA1_in);
 252         } else {
 253                 pr_err("aw2: snd_aw2_saa7146_pcm_init_capture: "
 254                        "Substream number is not 0 -> not managed\n");
 255         }
 256 }
 257
 258 void snd_aw2_saa7146_define_it_playback_callback(unsigned int stream_number,
 259                                                  snd_aw2_saa7146_it_cb
 260                                                  p_it_callback,
 261                                                  void *p_callback_param)
 262 {
 263         if (stream_number < NB_STREAM_PLAYBACK) {
 264                 arr_substream_it_playback_cb[stream_number].p_it_callback =
 265                     (snd_aw2_saa7146_it_cb) p_it_callback;
 266                 arr_substream_it_playback_cb[stream_number].p_callback_param =
 267                     (void *)p_callback_param;
 268         }
 269 }
 270
 271 void snd_aw2_saa7146_define_it_capture_callback(unsigned int stream_number,
 272                                                 snd_aw2_saa7146_it_cb
 273                                                 p_it_callback,
 274                                                 void *p_callback_param)
 275 {
 276         if (stream_number < NB_STREAM_CAPTURE) {
 277                 arr_substream_it_capture_cb[stream_number].p_it_callback =
 278                     (snd_aw2_saa7146_it_cb) p_it_callback;
 279                 arr_substream_it_capture_cb[stream_number].p_callback_param =
 280                     (void *)p_callback_param;
 281         }
 282 }
 283
 284 void snd_aw2_saa7146_pcm_trigger_start_playback(struct snd_aw2_saa7146 *chip,
 285                                                 int stream_number)
 286 {
 287         unsigned int acon1 = 0;
 288         /* In aw8 driver, dma transfert is always active. It is
 289            started and stopped in a larger "space" */
 290         acon1 = READREG(ACON1);
 291         if (stream_number == 0) {
 292                 WRITEREG((TR_E_A2_OUT << 16) | TR_E_A2_OUT, MC1);
 293
 294                 /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */
 295                 acon1 |= 2 * WS2_CTRL;
 296                 WRITEREG(acon1, ACON1);
 297
 298         } else if (stream_number == 1) {
 299                 WRITEREG((TR_E_A1_OUT << 16) | TR_E_A1_OUT, MC1);
 300
 301                 /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */
 302                 acon1 |= 1 * WS1_CTRL;
 303                 WRITEREG(acon1, ACON1);
 304         }
 305 }
 306
 307 void snd_aw2_saa7146_pcm_trigger_stop_playback(struct snd_aw2_saa7146 *chip,
 308                                                int stream_number)
 309 {
 310         unsigned int acon1 = 0;
 311         acon1 = READREG(ACON1);
 312         if (stream_number == 0) {
 313                 /* WS2_CTRL, WS2_SYNC: output TSL2, I2S */
 314                 acon1 &= ~(3 * WS2_CTRL);
 315                 WRITEREG(acon1, ACON1);
 316
 317                 WRITEREG((TR_E_A2_OUT << 16), MC1);
 318         } else if (stream_number == 1) {
 319                 /* WS1_CTRL, WS1_SYNC: output TSL1, I2S */
 320                 acon1 &= ~(3 * WS1_CTRL);
 321                 WRITEREG(acon1, ACON1);
 322
 323                 WRITEREG((TR_E_A1_OUT << 16), MC1);
 324         }
 325 }
 326
 327 void snd_aw2_saa7146_pcm_trigger_start_capture(struct snd_aw2_saa7146 *chip,
 328                                                int stream_number)
 329 {
 330         /* In aw8 driver, dma transfert is always active. It is
 331            started and stopped in a larger "space" */
 332         if (stream_number == 0)
 333                 WRITEREG((TR_E_A1_IN << 16) | TR_E_A1_IN, MC1);
 334 }
 335
 336 void snd_aw2_saa7146_pcm_trigger_stop_capture(struct snd_aw2_saa7146 *chip,
 337                                               int stream_number)
 338 {
 339         if (stream_number == 0)
 340                 WRITEREG((TR_E_A1_IN << 16), MC1);
 341 }
 342
 343 irqreturn_t snd_aw2_saa7146_interrupt(int irq, void *dev_id)
 344 {
 345         unsigned int isr;
 346         unsigned int iicsta;
 347         struct snd_aw2_saa7146 *chip = dev_id;
 348
 349         isr = READREG(ISR);
 350         if (!isr)
 351                 return IRQ_NONE;
 352
 353         WRITEREG(isr, ISR);
 354
 355         if (isr & (IIC_S | IIC_E)) {
 356                 iicsta = READREG(IICSTA);
 357                 WRITEREG(0x100, IICSTA);
 358         }
 359
 360         if (isr & A1_out) {
 361                 if (arr_substream_it_playback_cb[1].p_it_callback != NULL) {
 362                         arr_substream_it_playback_cb[1].
 363                             p_it_callback(arr_substream_it_playback_cb[1].
 364                                           p_callback_param);
 365                 }
 366         }
 367         if (isr & A2_out) {
 368                 if (arr_substream_it_playback_cb[0].p_it_callback != NULL) {
 369                         arr_substream_it_playback_cb[0].
 370                             p_it_callback(arr_substream_it_playback_cb[0].
 371                                           p_callback_param);
 372                 }
 373
 374         }
 375         if (isr & A1_in) {
 376                 if (arr_substream_it_capture_cb[0].p_it_callback != NULL) {
 377                         arr_substream_it_capture_cb[0].
 378                             p_it_callback(arr_substream_it_capture_cb[0].
 379                                           p_callback_param);
 380                 }
 381         }
 382         return IRQ_HANDLED;
 383 }
 384
 385 unsigned int snd_aw2_saa7146_get_hw_ptr_playback(struct snd_aw2_saa7146 *chip,
 386                                                  int stream_number,
 387                                                  unsigned char *start_addr,
 388                                                  unsigned int buffer_size)
 389 {
 390         long pci_adp = 0;
 391         size_t ptr = 0;
 392
 393         if (stream_number == 0) {
 394                 pci_adp = READREG(PCI_ADP3);
 395                 ptr = pci_adp - (long)start_addr;
 396
 397                 if (ptr == buffer_size)
 398                         ptr = 0;
 399         }
 400         if (stream_number == 1) {
 401                 pci_adp = READREG(PCI_ADP1);
 402                 ptr = pci_adp - (size_t) start_addr;
 403
 404                 if (ptr == buffer_size)
 405                         ptr = 0;
 406         }
 407         return ptr;
 408 }
 409
 410 unsigned int snd_aw2_saa7146_get_hw_ptr_capture(struct snd_aw2_saa7146 *chip,
 411                                                 int stream_number,
 412                                                 unsigned char *start_addr,
 413                                                 unsigned int buffer_size)
 414 {
 415         size_t pci_adp = 0;
 416         size_t ptr = 0;
 417         if (stream_number == 0) {
 418                 pci_adp = READREG(PCI_ADP2);
 419                 ptr = pci_adp - (size_t) start_addr;
 420
 421                 if (ptr == buffer_size)
 422                         ptr = 0;
 423         }
 424         return ptr;
 425 }
 426
 427 void snd_aw2_saa7146_use_digital_input(struct snd_aw2_saa7146 *chip,
 428                                        int use_digital)
 429 {
 430         /* FIXME: switch between analog and digital input does not always work.
 431            It can produce a kind of white noise. It seams that received data
 432            are inverted sometime (endian inversion). Why ? I don't know, maybe
 433            a problem of synchronization... However for the time being I have
 434            not found the problem. Workaround: switch again (and again) between
 435            digital and analog input until it works. */
 436         if (use_digital)
 437                 WRITEREG(0x40, GPIO_CTRL);
 438         else
 439                 WRITEREG(0x50, GPIO_CTRL);
 440 }
 441
 442 int snd_aw2_saa7146_is_using_digital_input(struct snd_aw2_saa7146 *chip)
 443 {
 444         unsigned int reg_val = READREG(GPIO_CTRL);
 445         if ((reg_val & 0xFF) == 0x40)
 446                 return 1;
 447         else
 448                 return 0;
 449 }
 450
 451
 452 static int snd_aw2_saa7146_get_limit(int size)
 453 {
 454         int limitsize = 32;
 455         int limit = 0;
 456         while (limitsize < size) {
 457                 limitsize *= 2;
 458                 limit++;
 459         }
 460         return limit;
 461 }