sound/pci/lx6464es/lx_core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* -*- linux-c -*- *
   3  *
   4  * ALSA driver for the digigram lx6464es interface
   5  * low-level interface
   6  *
   7  * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
   8  */
   9
  10 /* #define RMH_DEBUG 1 */
  11
  12 #include <linux/bitops.h>
  13 #include <linux/module.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16
  17 #include "lx6464es.h"
  18 #include "lx_core.h"
  19
  20 /* low-level register access */
  21
  22 static const unsigned long dsp_port_offsets[] = {
  23         0,
  24         0x400,
  25         0x401,
  26         0x402,
  27         0x403,
  28         0x404,
  29         0x405,
  30         0x406,
  31         0x407,
  32         0x408,
  33         0x409,
  34         0x40a,
  35         0x40b,
  36         0x40c,
  37
  38         0x410,
  39         0x411,
  40         0x412,
  41         0x413,
  42         0x414,
  43         0x415,
  44         0x416,
  45
  46         0x420,
  47         0x430,
  48         0x431,
  49         0x432,
  50         0x433,
  51         0x434,
  52         0x440
  53 };
  54
  55 static void __iomem *lx_dsp_register(struct lx6464es *chip, int port)
  56 {
  57         void __iomem *base_address = chip->port_dsp_bar;
  58         return base_address + dsp_port_offsets[port]*4;
  59 }
  60
  61 unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port)
  62 {
  63         void __iomem *address = lx_dsp_register(chip, port);
  64         return ioread32(address);
  65 }
  66
  67 static void lx_dsp_reg_readbuf(struct lx6464es *chip, int port, u32 *data,
  68                                u32 len)
  69 {
  70         u32 __iomem *address = lx_dsp_register(chip, port);
  71         int i;
  72
  73         /* we cannot use memcpy_fromio */
  74         for (i = 0; i != len; ++i)
  75                 data[i] = ioread32(address + i);
  76 }
  77
  78
  79 void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data)
  80 {
  81         void __iomem *address = lx_dsp_register(chip, port);
  82         iowrite32(data, address);
  83 }
  84
  85 static void lx_dsp_reg_writebuf(struct lx6464es *chip, int port,
  86                                 const u32 *data, u32 len)
  87 {
  88         u32 __iomem *address = lx_dsp_register(chip, port);
  89         int i;
  90
  91         /* we cannot use memcpy_to */
  92         for (i = 0; i != len; ++i)
  93                 iowrite32(data[i], address + i);
  94 }
  95
  96
  97 static const unsigned long plx_port_offsets[] = {
  98         0x04,
  99         0x40,
 100         0x44,
 101         0x48,
 102         0x4c,
 103         0x50,
 104         0x54,
 105         0x58,
 106         0x5c,
 107         0x64,
 108         0x68,
 109         0x6C
 110 };
 111
 112 static void __iomem *lx_plx_register(struct lx6464es *chip, int port)
 113 {
 114         void __iomem *base_address = chip->port_plx_remapped;
 115         return base_address + plx_port_offsets[port];
 116 }
 117
 118 unsigned long lx_plx_reg_read(struct lx6464es *chip, int port)
 119 {
 120         void __iomem *address = lx_plx_register(chip, port);
 121         return ioread32(address);
 122 }
 123
 124 void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data)
 125 {
 126         void __iomem *address = lx_plx_register(chip, port);
 127         iowrite32(data, address);
 128 }
 129
 130 /* rmh */
 131
 132 #ifdef CONFIG_SND_DEBUG
 133 #define CMD_NAME(a) a
 134 #else
 135 #define CMD_NAME(a) NULL
 136 #endif
 137
 138 #define Reg_CSM_MR                      0x00000002
 139 #define Reg_CSM_MC                      0x00000001
 140
 141 struct dsp_cmd_info {
 142         u32    dcCodeOp;        /* Op Code of the command (usually 1st 24-bits
 143                                  * word).*/
 144         u16    dcCmdLength;     /* Command length in words of 24 bits.*/
 145         u16    dcStatusType;    /* Status type: 0 for fixed length, 1 for
 146                                  * random. */
 147         u16    dcStatusLength;  /* Status length (if fixed).*/
 148         char  *dcOpName;
 149 };
 150
 151 /*
 152   Initialization and control data for the Microblaze interface
 153   - OpCode:
 154     the opcode field of the command set at the proper offset
 155   - CmdLength
 156     the number of command words
 157   - StatusType
 158     offset in the status registers: 0 means that the return value may be
 159     different from 0, and must be read
 160   - StatusLength
 161     the number of status words (in addition to the return value)
 162 */
 163
 164 static struct dsp_cmd_info dsp_commands[] =
 165 {
 166         { (CMD_00_INFO_DEBUG << OPCODE_OFFSET)                  , 1 /*custom*/
 167           , 1   , 0 /**/                    , CMD_NAME("INFO_DEBUG") },
 168         { (CMD_01_GET_SYS_CFG << OPCODE_OFFSET)                 , 1 /**/
 169           , 1      , 2 /**/                 , CMD_NAME("GET_SYS_CFG") },
 170         { (CMD_02_SET_GRANULARITY << OPCODE_OFFSET)             , 1 /**/
 171           , 1      , 0 /**/                 , CMD_NAME("SET_GRANULARITY") },
 172         { (CMD_03_SET_TIMER_IRQ << OPCODE_OFFSET)               , 1 /**/
 173           , 1      , 0 /**/                 , CMD_NAME("SET_TIMER_IRQ") },
 174         { (CMD_04_GET_EVENT << OPCODE_OFFSET)                   , 1 /**/
 175           , 1      , 0 /*up to 10*/     , CMD_NAME("GET_EVENT") },
 176         { (CMD_05_GET_PIPES << OPCODE_OFFSET)                   , 1 /**/
 177           , 1      , 2 /*up to 4*/      , CMD_NAME("GET_PIPES") },
 178         { (CMD_06_ALLOCATE_PIPE << OPCODE_OFFSET)               , 1 /**/
 179           , 0      , 0 /**/                 , CMD_NAME("ALLOCATE_PIPE") },
 180         { (CMD_07_RELEASE_PIPE << OPCODE_OFFSET)                , 1 /**/
 181           , 0      , 0 /**/                 , CMD_NAME("RELEASE_PIPE") },
 182         { (CMD_08_ASK_BUFFERS << OPCODE_OFFSET)                 , 1 /**/
 183           , 1      , MAX_STREAM_BUFFER  , CMD_NAME("ASK_BUFFERS") },
 184         { (CMD_09_STOP_PIPE << OPCODE_OFFSET)                   , 1 /**/
 185           , 0      , 0 /*up to 2*/      , CMD_NAME("STOP_PIPE") },
 186         { (CMD_0A_GET_PIPE_SPL_COUNT << OPCODE_OFFSET)          , 1 /**/
 187           , 1      , 1 /*up to 2*/      , CMD_NAME("GET_PIPE_SPL_COUNT") },
 188         { (CMD_0B_TOGGLE_PIPE_STATE << OPCODE_OFFSET)           , 1 /*up to 5*/
 189           , 1      , 0 /**/                 , CMD_NAME("TOGGLE_PIPE_STATE") },
 190         { (CMD_0C_DEF_STREAM << OPCODE_OFFSET)                  , 1 /*up to 4*/
 191           , 1      , 0 /**/                 , CMD_NAME("DEF_STREAM") },
 192         { (CMD_0D_SET_MUTE  << OPCODE_OFFSET)                   , 3 /**/
 193           , 1      , 0 /**/                 , CMD_NAME("SET_MUTE") },
 194         { (CMD_0E_GET_STREAM_SPL_COUNT << OPCODE_OFFSET)        , 1/**/
 195           , 1      , 2 /**/                 , CMD_NAME("GET_STREAM_SPL_COUNT") },
 196         { (CMD_0F_UPDATE_BUFFER << OPCODE_OFFSET)               , 3 /*up to 4*/
 197           , 0      , 1 /**/                 , CMD_NAME("UPDATE_BUFFER") },
 198         { (CMD_10_GET_BUFFER << OPCODE_OFFSET)                  , 1 /**/
 199           , 1      , 4 /**/                 , CMD_NAME("GET_BUFFER") },
 200         { (CMD_11_CANCEL_BUFFER << OPCODE_OFFSET)               , 1 /**/
 201           , 1      , 1 /*up to 4*/      , CMD_NAME("CANCEL_BUFFER") },
 202         { (CMD_12_GET_PEAK << OPCODE_OFFSET)                    , 1 /**/
 203           , 1      , 1 /**/                 , CMD_NAME("GET_PEAK") },
 204         { (CMD_13_SET_STREAM_STATE << OPCODE_OFFSET)            , 1 /**/
 205           , 1      , 0 /**/                 , CMD_NAME("SET_STREAM_STATE") },
 206 };
 207
 208 static void lx_message_init(struct lx_rmh *rmh, enum cmd_mb_opcodes cmd)
 209 {
 210         snd_BUG_ON(cmd >= CMD_14_INVALID);
 211
 212         rmh->cmd[0] = dsp_commands[cmd].dcCodeOp;
 213         rmh->cmd_len = dsp_commands[cmd].dcCmdLength;
 214         rmh->stat_len = dsp_commands[cmd].dcStatusLength;
 215         rmh->dsp_stat = dsp_commands[cmd].dcStatusType;
 216         rmh->cmd_idx = cmd;
 217         memset(&rmh->cmd[1], 0, (REG_CRM_NUMBER - 1) * sizeof(u32));
 218
 219 #ifdef CONFIG_SND_DEBUG
 220         memset(rmh->stat, 0, REG_CRM_NUMBER * sizeof(u32));
 221 #endif
 222 #ifdef RMH_DEBUG
 223         rmh->cmd_idx = cmd;
 224 #endif
 225 }
 226
 227 #ifdef RMH_DEBUG
 228 #define LXRMH "lx6464es rmh: "
 229 static void lx_message_dump(struct lx_rmh *rmh)
 230 {
 231         u8 idx = rmh->cmd_idx;
 232         int i;
 233
 234         snd_printk(LXRMH "command %s\n", dsp_commands[idx].dcOpName);
 235
 236         for (i = 0; i != rmh->cmd_len; ++i)
 237                 snd_printk(LXRMH "\tcmd[%d] %08x\n", i, rmh->cmd[i]);
 238
 239         for (i = 0; i != rmh->stat_len; ++i)
 240                 snd_printk(LXRMH "\tstat[%d]: %08x\n", i, rmh->stat[i]);
 241         snd_printk("\n");
 242 }
 243 #else
 244 static inline void lx_message_dump(struct lx_rmh *rmh)
 245 {}
 246 #endif
 247
 248
 249
 250 /* sleep 500 - 100 = 400 times 100us -> the timeout is >= 40 ms */
 251 #define XILINX_TIMEOUT_MS       40
 252 #define XILINX_POLL_NO_SLEEP    100
 253 #define XILINX_POLL_ITERATIONS  150
 254
 255
 256 static int lx_message_send_atomic(struct lx6464es *chip, struct lx_rmh *rmh)
 257 {
 258         u32 reg = ED_DSP_TIMED_OUT;
 259         int dwloop;
 260
 261         if (lx_dsp_reg_read(chip, eReg_CSM) & (Reg_CSM_MC | Reg_CSM_MR)) {
 262                 dev_err(chip->card->dev, "PIOSendMessage eReg_CSM %x\n", reg);
 263                 return -EBUSY;
 264         }
 265
 266         /* write command */
 267         lx_dsp_reg_writebuf(chip, eReg_CRM1, rmh->cmd, rmh->cmd_len);
 268
 269         /* MicoBlaze gogogo */
 270         lx_dsp_reg_write(chip, eReg_CSM, Reg_CSM_MC);
 271
 272         /* wait for device to answer */
 273         for (dwloop = 0; dwloop != XILINX_TIMEOUT_MS * 1000; ++dwloop) {
 274                 if (lx_dsp_reg_read(chip, eReg_CSM) & Reg_CSM_MR) {
 275                         if (rmh->dsp_stat == 0)
 276                                 reg = lx_dsp_reg_read(chip, eReg_CRM1);
 277                         else
 278                                 reg = 0;
 279                         goto polling_successful;
 280                 } else
 281                         udelay(1);
 282         }
 283         dev_warn(chip->card->dev, "TIMEOUT lx_message_send_atomic! "
 284                    "polling failed\n");
 285
 286 polling_successful:
 287         if ((reg & ERROR_VALUE) == 0) {
 288                 /* read response */
 289                 if (rmh->stat_len) {
 290                         snd_BUG_ON(rmh->stat_len >= (REG_CRM_NUMBER-1));
 291                         lx_dsp_reg_readbuf(chip, eReg_CRM2, rmh->stat,
 292                                            rmh->stat_len);
 293                 }
 294         } else
 295                 dev_err(chip->card->dev, "rmh error: %08x\n", reg);
 296
 297         /* clear Reg_CSM_MR */
 298         lx_dsp_reg_write(chip, eReg_CSM, 0);
 299
 300         switch (reg) {
 301         case ED_DSP_TIMED_OUT:
 302                 dev_warn(chip->card->dev, "lx_message_send: dsp timeout\n");
 303                 return -ETIMEDOUT;
 304
 305         case ED_DSP_CRASHED:
 306                 dev_warn(chip->card->dev, "lx_message_send: dsp crashed\n");
 307                 return -EAGAIN;
 308         }
 309
 310         lx_message_dump(rmh);
 311
 312         return reg;
 313 }
 314
 315
 316 /* low-level dsp access */
 317 int lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version)
 318 {
 319         u16 ret;
 320
 321         mutex_lock(&chip->msg_lock);
 322
 323         lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
 324         ret = lx_message_send_atomic(chip, &chip->rmh);
 325
 326         *rdsp_version = chip->rmh.stat[1];
 327         mutex_unlock(&chip->msg_lock);
 328         return ret;
 329 }
 330
 331 int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq)
 332 {
 333         u16 ret = 0;
 334         u32 freq_raw = 0;
 335         u32 freq = 0;
 336         u32 frequency = 0;
 337
 338         mutex_lock(&chip->msg_lock);
 339
 340         lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
 341         ret = lx_message_send_atomic(chip, &chip->rmh);
 342
 343         if (ret == 0) {
 344                 freq_raw = chip->rmh.stat[0] >> FREQ_FIELD_OFFSET;
 345                 freq = freq_raw & XES_FREQ_COUNT8_MASK;
 346
 347                 if ((freq < XES_FREQ_COUNT8_48_MAX) ||
 348                     (freq > XES_FREQ_COUNT8_44_MIN))
 349                         frequency = 0; /* unknown */
 350                 else if (freq >= XES_FREQ_COUNT8_44_MAX)
 351                         frequency = 44100;
 352                 else
 353                         frequency = 48000;
 354         }
 355
 356         mutex_unlock(&chip->msg_lock);
 357
 358         *rfreq = frequency * chip->freq_ratio;
 359
 360         return ret;
 361 }
 362
 363 int lx_dsp_get_mac(struct lx6464es *chip)
 364 {
 365         u32 macmsb, maclsb;
 366
 367         macmsb = lx_dsp_reg_read(chip, eReg_ADMACESMSB) & 0x00FFFFFF;
 368         maclsb = lx_dsp_reg_read(chip, eReg_ADMACESLSB) & 0x00FFFFFF;
 369
 370         /* todo: endianess handling */
 371         chip->mac_address[5] = ((u8 *)(&maclsb))[0];
 372         chip->mac_address[4] = ((u8 *)(&maclsb))[1];
 373         chip->mac_address[3] = ((u8 *)(&maclsb))[2];
 374         chip->mac_address[2] = ((u8 *)(&macmsb))[0];
 375         chip->mac_address[1] = ((u8 *)(&macmsb))[1];
 376         chip->mac_address[0] = ((u8 *)(&macmsb))[2];
 377
 378         return 0;
 379 }
 380
 381
 382 int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran)
 383 {
 384         int ret;
 385
 386         mutex_lock(&chip->msg_lock);
 387
 388         lx_message_init(&chip->rmh, CMD_02_SET_GRANULARITY);
 389         chip->rmh.cmd[0] |= gran;
 390
 391         ret = lx_message_send_atomic(chip, &chip->rmh);
 392         mutex_unlock(&chip->msg_lock);
 393         return ret;
 394 }
 395
 396 int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data)
 397 {
 398         int ret;
 399
 400         mutex_lock(&chip->msg_lock);
 401
 402         lx_message_init(&chip->rmh, CMD_04_GET_EVENT);
 403         chip->rmh.stat_len = 9; /* we don't necessarily need the full length */
 404
 405         ret = lx_message_send_atomic(chip, &chip->rmh);
 406
 407         if (!ret)
 408                 memcpy(data, chip->rmh.stat, chip->rmh.stat_len * sizeof(u32));
 409
 410         mutex_unlock(&chip->msg_lock);
 411         return ret;
 412 }
 413
 414 #define PIPE_INFO_TO_CMD(capture, pipe)                                 \
 415         ((u32)((u32)(pipe) | ((capture) ? ID_IS_CAPTURE : 0L)) << ID_OFFSET)
 416
 417
 418
 419 /* low-level pipe handling */
 420 int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture,
 421                      int channels)
 422 {
 423         int err;
 424         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 425
 426         mutex_lock(&chip->msg_lock);
 427         lx_message_init(&chip->rmh, CMD_06_ALLOCATE_PIPE);
 428
 429         chip->rmh.cmd[0] |= pipe_cmd;
 430         chip->rmh.cmd[0] |= channels;
 431
 432         err = lx_message_send_atomic(chip, &chip->rmh);
 433         mutex_unlock(&chip->msg_lock);
 434
 435         if (err != 0)
 436                 dev_err(chip->card->dev, "could not allocate pipe\n");
 437
 438         return err;
 439 }
 440
 441 int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture)
 442 {
 443         int err;
 444         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 445
 446         mutex_lock(&chip->msg_lock);
 447         lx_message_init(&chip->rmh, CMD_07_RELEASE_PIPE);
 448
 449         chip->rmh.cmd[0] |= pipe_cmd;
 450
 451         err = lx_message_send_atomic(chip, &chip->rmh);
 452         mutex_unlock(&chip->msg_lock);
 453
 454         return err;
 455 }
 456
 457 int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
 458                   u32 *r_needed, u32 *r_freed, u32 *size_array)
 459 {
 460         int err;
 461         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 462
 463 #ifdef CONFIG_SND_DEBUG
 464         if (size_array)
 465                 memset(size_array, 0, sizeof(u32)*MAX_STREAM_BUFFER);
 466 #endif
 467
 468         *r_needed = 0;
 469         *r_freed = 0;
 470
 471         mutex_lock(&chip->msg_lock);
 472         lx_message_init(&chip->rmh, CMD_08_ASK_BUFFERS);
 473
 474         chip->rmh.cmd[0] |= pipe_cmd;
 475
 476         err = lx_message_send_atomic(chip, &chip->rmh);
 477
 478         if (!err) {
 479                 int i;
 480                 for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
 481                         u32 stat = chip->rmh.stat[i];
 482                         if (stat & (BF_EOB << BUFF_FLAGS_OFFSET)) {
 483                                 /* finished */
 484                                 *r_freed += 1;
 485                                 if (size_array)
 486                                         size_array[i] = stat & MASK_DATA_SIZE;
 487                         } else if ((stat & (BF_VALID << BUFF_FLAGS_OFFSET))
 488                                    == 0)
 489                                 /* free */
 490                                 *r_needed += 1;
 491                 }
 492
 493                 dev_dbg(chip->card->dev,
 494                         "CMD_08_ASK_BUFFERS: needed %d, freed %d\n",
 495                             *r_needed, *r_freed);
 496                 for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
 497                         for (i = 0; i != chip->rmh.stat_len; ++i)
 498                                 dev_dbg(chip->card->dev,
 499                                         "  stat[%d]: %x, %x\n", i,
 500                                             chip->rmh.stat[i],
 501                                             chip->rmh.stat[i] & MASK_DATA_SIZE);
 502                 }
 503         }
 504
 505         mutex_unlock(&chip->msg_lock);
 506         return err;
 507 }
 508
 509
 510 int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture)
 511 {
 512         int err;
 513         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 514
 515         mutex_lock(&chip->msg_lock);
 516         lx_message_init(&chip->rmh, CMD_09_STOP_PIPE);
 517
 518         chip->rmh.cmd[0] |= pipe_cmd;
 519
 520         err = lx_message_send_atomic(chip, &chip->rmh);
 521
 522         mutex_unlock(&chip->msg_lock);
 523         return err;
 524 }
 525
 526 static int lx_pipe_toggle_state(struct lx6464es *chip, u32 pipe, int is_capture)
 527 {
 528         int err;
 529         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 530
 531         mutex_lock(&chip->msg_lock);
 532         lx_message_init(&chip->rmh, CMD_0B_TOGGLE_PIPE_STATE);
 533
 534         chip->rmh.cmd[0] |= pipe_cmd;
 535
 536         err = lx_message_send_atomic(chip, &chip->rmh);
 537
 538         mutex_unlock(&chip->msg_lock);
 539         return err;
 540 }
 541
 542
 543 int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture)
 544 {
 545         int err;
 546
 547         err = lx_pipe_wait_for_idle(chip, pipe, is_capture);
 548         if (err < 0)
 549                 return err;
 550
 551         err = lx_pipe_toggle_state(chip, pipe, is_capture);
 552
 553         return err;
 554 }
 555
 556 int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture)
 557 {
 558         int err = 0;
 559
 560         err = lx_pipe_wait_for_start(chip, pipe, is_capture);
 561         if (err < 0)
 562                 return err;
 563
 564         err = lx_pipe_toggle_state(chip, pipe, is_capture);
 565
 566         return err;
 567 }
 568
 569
 570 int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture,
 571                          u64 *rsample_count)
 572 {
 573         int err;
 574         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 575
 576         mutex_lock(&chip->msg_lock);
 577         lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
 578
 579         chip->rmh.cmd[0] |= pipe_cmd;
 580         chip->rmh.stat_len = 2; /* need all words here! */
 581
 582         err = lx_message_send_atomic(chip, &chip->rmh); /* don't sleep! */
 583
 584         if (err != 0)
 585                 dev_err(chip->card->dev,
 586                         "could not query pipe's sample count\n");
 587         else {
 588                 *rsample_count = ((u64)(chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
 589                                   << 24)     /* hi part */
 590                         + chip->rmh.stat[1]; /* lo part */
 591         }
 592
 593         mutex_unlock(&chip->msg_lock);
 594         return err;
 595 }
 596
 597 int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate)
 598 {
 599         int err;
 600         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 601
 602         mutex_lock(&chip->msg_lock);
 603         lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
 604
 605         chip->rmh.cmd[0] |= pipe_cmd;
 606
 607         err = lx_message_send_atomic(chip, &chip->rmh);
 608
 609         if (err != 0)
 610                 dev_err(chip->card->dev, "could not query pipe's state\n");
 611         else
 612                 *rstate = (chip->rmh.stat[0] >> PSTATE_OFFSET) & 0x0F;
 613
 614         mutex_unlock(&chip->msg_lock);
 615         return err;
 616 }
 617
 618 static int lx_pipe_wait_for_state(struct lx6464es *chip, u32 pipe,
 619                                   int is_capture, u16 state)
 620 {
 621         int i;
 622
 623         /* max 2*PCMOnlyGranularity = 2*1024 at 44100 = < 50 ms:
 624          * timeout 50 ms */
 625         for (i = 0; i != 50; ++i) {
 626                 u16 current_state;
 627                 int err = lx_pipe_state(chip, pipe, is_capture, &current_state);
 628
 629                 if (err < 0)
 630                         return err;
 631
 632                 if (!err && current_state == state)
 633                         return 0;
 634
 635                 mdelay(1);
 636         }
 637
 638         return -ETIMEDOUT;
 639 }
 640
 641 int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture)
 642 {
 643         return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_RUN);
 644 }
 645
 646 int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture)
 647 {
 648         return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_IDLE);
 649 }
 650
 651 /* low-level stream handling */
 652 int lx_stream_set_state(struct lx6464es *chip, u32 pipe,
 653                                int is_capture, enum stream_state_t state)
 654 {
 655         int err;
 656         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 657
 658         mutex_lock(&chip->msg_lock);
 659         lx_message_init(&chip->rmh, CMD_13_SET_STREAM_STATE);
 660
 661         chip->rmh.cmd[0] |= pipe_cmd;
 662         chip->rmh.cmd[0] |= state;
 663
 664         err = lx_message_send_atomic(chip, &chip->rmh);
 665         mutex_unlock(&chip->msg_lock);
 666
 667         return err;
 668 }
 669
 670 int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime,
 671                          u32 pipe, int is_capture)
 672 {
 673         int err;
 674         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 675         u32 channels = runtime->channels;
 676
 677         if (runtime->channels != channels)
 678                 dev_err(chip->card->dev, "channel count mismatch: %d vs %d",
 679                            runtime->channels, channels);
 680
 681         mutex_lock(&chip->msg_lock);
 682         lx_message_init(&chip->rmh, CMD_0C_DEF_STREAM);
 683
 684         chip->rmh.cmd[0] |= pipe_cmd;
 685
 686         if (runtime->sample_bits == 16)
 687                 /* 16 bit format */
 688                 chip->rmh.cmd[0] |= (STREAM_FMT_16b << STREAM_FMT_OFFSET);
 689
 690         if (snd_pcm_format_little_endian(runtime->format))
 691                 /* little endian/intel format */
 692                 chip->rmh.cmd[0] |= (STREAM_FMT_intel << STREAM_FMT_OFFSET);
 693
 694         chip->rmh.cmd[0] |= channels-1;
 695
 696         err = lx_message_send_atomic(chip, &chip->rmh);
 697         mutex_unlock(&chip->msg_lock);
 698
 699         return err;
 700 }
 701
 702 int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture,
 703                     int *rstate)
 704 {
 705         int err;
 706         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 707
 708         mutex_lock(&chip->msg_lock);
 709         lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
 710
 711         chip->rmh.cmd[0] |= pipe_cmd;
 712
 713         err = lx_message_send_atomic(chip, &chip->rmh);
 714
 715         *rstate = (chip->rmh.stat[0] & SF_START) ? START_STATE : PAUSE_STATE;
 716
 717         mutex_unlock(&chip->msg_lock);
 718         return err;
 719 }
 720
 721 int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture,
 722                               u64 *r_bytepos)
 723 {
 724         int err;
 725         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 726
 727         mutex_lock(&chip->msg_lock);
 728         lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
 729
 730         chip->rmh.cmd[0] |= pipe_cmd;
 731
 732         err = lx_message_send_atomic(chip, &chip->rmh);
 733
 734         *r_bytepos = ((u64) (chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
 735                       << 32)         /* hi part */
 736                 + chip->rmh.stat[1]; /* lo part */
 737
 738         mutex_unlock(&chip->msg_lock);
 739         return err;
 740 }
 741
 742 /* low-level buffer handling */
 743 int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture,
 744                    u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi,
 745                    u32 *r_buffer_index)
 746 {
 747         int err;
 748         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 749
 750         mutex_lock(&chip->msg_lock);
 751         lx_message_init(&chip->rmh, CMD_0F_UPDATE_BUFFER);
 752
 753         chip->rmh.cmd[0] |= pipe_cmd;
 754         chip->rmh.cmd[0] |= BF_NOTIFY_EOB; /* request interrupt notification */
 755
 756         /* todo: pause request, circular buffer */
 757
 758         chip->rmh.cmd[1] = buffer_size & MASK_DATA_SIZE;
 759         chip->rmh.cmd[2] = buf_address_lo;
 760
 761         if (buf_address_hi) {
 762                 chip->rmh.cmd_len = 4;
 763                 chip->rmh.cmd[3] = buf_address_hi;
 764                 chip->rmh.cmd[0] |= BF_64BITS_ADR;
 765         }
 766
 767         err = lx_message_send_atomic(chip, &chip->rmh);
 768
 769         if (err == 0) {
 770                 *r_buffer_index = chip->rmh.stat[0];
 771                 goto done;
 772         }
 773
 774         if (err == EB_RBUFFERS_TABLE_OVERFLOW)
 775                 dev_err(chip->card->dev,
 776                         "lx_buffer_give EB_RBUFFERS_TABLE_OVERFLOW\n");
 777
 778         if (err == EB_INVALID_STREAM)
 779                 dev_err(chip->card->dev,
 780                         "lx_buffer_give EB_INVALID_STREAM\n");
 781
 782         if (err == EB_CMD_REFUSED)
 783                 dev_err(chip->card->dev,
 784                         "lx_buffer_give EB_CMD_REFUSED\n");
 785
 786  done:
 787         mutex_unlock(&chip->msg_lock);
 788         return err;
 789 }
 790
 791 int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture,
 792                    u32 *r_buffer_size)
 793 {
 794         int err;
 795         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 796
 797         mutex_lock(&chip->msg_lock);
 798         lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
 799
 800         chip->rmh.cmd[0] |= pipe_cmd;
 801         chip->rmh.cmd[0] |= MASK_BUFFER_ID; /* ask for the current buffer: the
 802                                              * microblaze will seek for it */
 803
 804         err = lx_message_send_atomic(chip, &chip->rmh);
 805
 806         if (err == 0)
 807                 *r_buffer_size = chip->rmh.stat[0]  & MASK_DATA_SIZE;
 808
 809         mutex_unlock(&chip->msg_lock);
 810         return err;
 811 }
 812
 813 int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture,
 814                      u32 buffer_index)
 815 {
 816         int err;
 817         u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
 818
 819         mutex_lock(&chip->msg_lock);
 820         lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
 821
 822         chip->rmh.cmd[0] |= pipe_cmd;
 823         chip->rmh.cmd[0] |= buffer_index;
 824
 825         err = lx_message_send_atomic(chip, &chip->rmh);
 826
 827         mutex_unlock(&chip->msg_lock);
 828         return err;
 829 }
 830
 831
 832 /* low-level gain/peak handling
 833  *
 834  * \todo: can we unmute capture/playback channels independently?
 835  *
 836  * */
 837 int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute)
 838 {
 839         int err;
 840         /* bit set to 1: channel muted */
 841         u64 mute_mask = unmute ? 0 : 0xFFFFFFFFFFFFFFFFLLU;
 842
 843         mutex_lock(&chip->msg_lock);
 844         lx_message_init(&chip->rmh, CMD_0D_SET_MUTE);
 845
 846         chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, 0);
 847
 848         chip->rmh.cmd[1] = (u32)(mute_mask >> (u64)32);        /* hi part */
 849         chip->rmh.cmd[2] = (u32)(mute_mask & (u64)0xFFFFFFFF); /* lo part */
 850
 851         dev_dbg(chip->card->dev,
 852                 "mute %x %x %x\n", chip->rmh.cmd[0], chip->rmh.cmd[1],
 853                    chip->rmh.cmd[2]);
 854
 855         err = lx_message_send_atomic(chip, &chip->rmh);
 856
 857         mutex_unlock(&chip->msg_lock);
 858         return err;
 859 }
 860
 861 static u32 peak_map[] = {
 862         0x00000109, /* -90.308dB */
 863         0x0000083B, /* -72.247dB */
 864         0x000020C4, /* -60.205dB */
 865         0x00008273, /* -48.030dB */
 866         0x00020756, /* -36.005dB */
 867         0x00040C37, /* -30.001dB */
 868         0x00081385, /* -24.002dB */
 869         0x00101D3F, /* -18.000dB */
 870         0x0016C310, /* -15.000dB */
 871         0x002026F2, /* -12.001dB */
 872         0x002D6A86, /* -9.000dB */
 873         0x004026E6, /* -6.004dB */
 874         0x005A9DF6, /* -3.000dB */
 875         0x0065AC8B, /* -2.000dB */
 876         0x00721481, /* -1.000dB */
 877         0x007FFFFF, /* FS */
 878 };
 879
 880 int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels,
 881                    u32 *r_levels)
 882 {
 883         int err = 0;
 884         int i;
 885
 886         mutex_lock(&chip->msg_lock);
 887         for (i = 0; i < channels; i += 4) {
 888                 u32 s0, s1, s2, s3;
 889
 890                 lx_message_init(&chip->rmh, CMD_12_GET_PEAK);
 891                 chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, i);
 892
 893                 err = lx_message_send_atomic(chip, &chip->rmh);
 894
 895                 if (err == 0) {
 896                         s0 = peak_map[chip->rmh.stat[0] & 0x0F];
 897                         s1 = peak_map[(chip->rmh.stat[0] >>  4) & 0xf];
 898                         s2 = peak_map[(chip->rmh.stat[0] >>  8) & 0xf];
 899                         s3 = peak_map[(chip->rmh.stat[0] >>  12) & 0xf];
 900                 } else
 901                         s0 = s1 = s2 = s3 = 0;
 902
 903                 r_levels[0] = s0;
 904                 r_levels[1] = s1;
 905                 r_levels[2] = s2;
 906                 r_levels[3] = s3;
 907
 908                 r_levels += 4;
 909         }
 910
 911         mutex_unlock(&chip->msg_lock);
 912         return err;
 913 }
 914
 915 /* interrupt handling */
 916 #define PCX_IRQ_NONE 0
 917 #define IRQCS_ACTIVE_PCIDB      BIT(13)
 918 #define IRQCS_ENABLE_PCIIRQ     BIT(8)
 919 #define IRQCS_ENABLE_PCIDB      BIT(9)
 920
 921 static u32 lx_interrupt_test_ack(struct lx6464es *chip)
 922 {
 923         u32 irqcs = lx_plx_reg_read(chip, ePLX_IRQCS);
 924
 925         /* Test if PCI Doorbell interrupt is active */
 926         if (irqcs & IRQCS_ACTIVE_PCIDB) {
 927                 u32 temp;
 928                 irqcs = PCX_IRQ_NONE;
 929
 930                 while ((temp = lx_plx_reg_read(chip, ePLX_L2PCIDB))) {
 931                         /* RAZ interrupt */
 932                         irqcs |= temp;
 933                         lx_plx_reg_write(chip, ePLX_L2PCIDB, temp);
 934                 }
 935
 936                 return irqcs;
 937         }
 938         return PCX_IRQ_NONE;
 939 }
 940
 941 static int lx_interrupt_ack(struct lx6464es *chip, u32 *r_irqsrc,
 942                             int *r_async_pending, int *r_async_escmd)
 943 {
 944         u32 irq_async;
 945         u32 irqsrc = lx_interrupt_test_ack(chip);
 946
 947         if (irqsrc == PCX_IRQ_NONE)
 948                 return 0;
 949
 950         *r_irqsrc = irqsrc;
 951
 952         irq_async = irqsrc & MASK_SYS_ASYNC_EVENTS; /* + EtherSound response
 953                                                      * (set by xilinx) + EOB */
 954
 955         if (irq_async & MASK_SYS_STATUS_ESA) {
 956                 irq_async &= ~MASK_SYS_STATUS_ESA;
 957                 *r_async_escmd = 1;
 958         }
 959
 960         if (irq_async) {
 961                 /* dev_dbg(chip->card->dev, "interrupt: async event pending\n"); */
 962                 *r_async_pending = 1;
 963         }
 964
 965         return 1;
 966 }
 967
 968 static int lx_interrupt_handle_async_events(struct lx6464es *chip, u32 irqsrc,
 969                                             int *r_freq_changed,
 970                                             u64 *r_notified_in_pipe_mask,
 971                                             u64 *r_notified_out_pipe_mask)
 972 {
 973         int err;
 974         u32 stat[9];            /* answer from CMD_04_GET_EVENT */
 975
 976         /* We can optimize this to not read dumb events.
 977          * Answer words are in the following order:
 978          * Stat[0]      general status
 979          * Stat[1]      end of buffer OUT pF
 980          * Stat[2]      end of buffer OUT pf
 981          * Stat[3]      end of buffer IN pF
 982          * Stat[4]      end of buffer IN pf
 983          * Stat[5]      MSB underrun
 984          * Stat[6]      LSB underrun
 985          * Stat[7]      MSB overrun
 986          * Stat[8]      LSB overrun
 987          * */
 988
 989         int eb_pending_out = (irqsrc & MASK_SYS_STATUS_EOBO) ? 1 : 0;
 990         int eb_pending_in  = (irqsrc & MASK_SYS_STATUS_EOBI) ? 1 : 0;
 991
 992         *r_freq_changed = (irqsrc & MASK_SYS_STATUS_FREQ) ? 1 : 0;
 993
 994         err = lx_dsp_read_async_events(chip, stat);
 995         if (err < 0)
 996                 return err;
 997
 998         if (eb_pending_in) {
 999                 *r_notified_in_pipe_mask = ((u64)stat[3] << 32)
1000                         + stat[4];
1001                 dev_dbg(chip->card->dev, "interrupt: EOBI pending %llx\n",
1002                             *r_notified_in_pipe_mask);
1003         }
1004         if (eb_pending_out) {
1005                 *r_notified_out_pipe_mask = ((u64)stat[1] << 32)
1006                         + stat[2];
1007                 dev_dbg(chip->card->dev, "interrupt: EOBO pending %llx\n",
1008                             *r_notified_out_pipe_mask);
1009         }
1010
1011         /* todo: handle xrun notification */
1012
1013         return err;
1014 }
1015
1016 static int lx_interrupt_request_new_buffer(struct lx6464es *chip,
1017                                            struct lx_stream *lx_stream)
1018 {
1019         struct snd_pcm_substream *substream = lx_stream->stream;
1020         const unsigned int is_capture = lx_stream->is_capture;
1021         int err;
1022
1023         const u32 channels = substream->runtime->channels;
1024         const u32 bytes_per_frame = channels * 3;
1025         const u32 period_size = substream->runtime->period_size;
1026         const u32 period_bytes = period_size * bytes_per_frame;
1027         const u32 pos = lx_stream->frame_pos;
1028         const u32 next_pos = ((pos+1) == substream->runtime->periods) ?
1029                 0 : pos + 1;
1030
1031         dma_addr_t buf = substream->dma_buffer.addr + pos * period_bytes;
1032         u32 buf_hi = 0;
1033         u32 buf_lo = 0;
1034         u32 buffer_index = 0;
1035
1036         u32 needed, freed;
1037         u32 size_array[MAX_STREAM_BUFFER];
1038
1039         dev_dbg(chip->card->dev, "->lx_interrupt_request_new_buffer\n");
1040
1041         mutex_lock(&chip->lock);
1042
1043         err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array);
1044         dev_dbg(chip->card->dev,
1045                 "interrupt: needed %d, freed %d\n", needed, freed);
1046
1047         unpack_pointer(buf, &buf_lo, &buf_hi);
1048         err = lx_buffer_give(chip, 0, is_capture, period_bytes, buf_lo, buf_hi,
1049                              &buffer_index);
1050         dev_dbg(chip->card->dev,
1051                 "interrupt: gave buffer index %x on 0x%lx (%d bytes)\n",
1052                     buffer_index, (unsigned long)buf, period_bytes);
1053
1054         lx_stream->frame_pos = next_pos;
1055         mutex_unlock(&chip->lock);
1056
1057         return err;
1058 }
1059
1060 irqreturn_t lx_interrupt(int irq, void *dev_id)
1061 {
1062         struct lx6464es *chip = dev_id;
1063         int async_pending, async_escmd;
1064         u32 irqsrc;
1065         bool wake_thread = false;
1066
1067         dev_dbg(chip->card->dev,
1068                 "**************************************************\n");
1069
1070         if (!lx_interrupt_ack(chip, &irqsrc, &async_pending, &async_escmd)) {
1071                 dev_dbg(chip->card->dev, "IRQ_NONE\n");
1072                 return IRQ_NONE; /* this device did not cause the interrupt */
1073         }
1074
1075         if (irqsrc & MASK_SYS_STATUS_CMD_DONE)
1076                 return IRQ_HANDLED;
1077
1078         if (irqsrc & MASK_SYS_STATUS_EOBI)
1079                 dev_dbg(chip->card->dev, "interrupt: EOBI\n");
1080
1081         if (irqsrc & MASK_SYS_STATUS_EOBO)
1082                 dev_dbg(chip->card->dev, "interrupt: EOBO\n");
1083
1084         if (irqsrc & MASK_SYS_STATUS_URUN)
1085                 dev_dbg(chip->card->dev, "interrupt: URUN\n");
1086
1087         if (irqsrc & MASK_SYS_STATUS_ORUN)
1088                 dev_dbg(chip->card->dev, "interrupt: ORUN\n");
1089
1090         if (async_pending) {
1091                 wake_thread = true;
1092                 chip->irqsrc = irqsrc;
1093         }
1094
1095         if (async_escmd) {
1096                 /* backdoor for ethersound commands
1097                  *
1098                  * for now, we do not need this
1099                  *
1100                  * */
1101
1102                 dev_dbg(chip->card->dev, "interrupt requests escmd handling\n");
1103         }
1104
1105         return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED;
1106 }
1107
1108 irqreturn_t lx_threaded_irq(int irq, void *dev_id)
1109 {
1110         struct lx6464es *chip = dev_id;
1111         u64 notified_in_pipe_mask = 0;
1112         u64 notified_out_pipe_mask = 0;
1113         int freq_changed;
1114         int err;
1115
1116         /* handle async events */
1117         err = lx_interrupt_handle_async_events(chip, chip->irqsrc,
1118                                                &freq_changed,
1119                                                &notified_in_pipe_mask,
1120                                                &notified_out_pipe_mask);
1121         if (err)
1122                 dev_err(chip->card->dev, "error handling async events\n");
1123
1124         if (notified_in_pipe_mask) {
1125                 struct lx_stream *lx_stream = &chip->capture_stream;
1126
1127                 dev_dbg(chip->card->dev,
1128                         "requesting audio transfer for capture\n");
1129                 err = lx_interrupt_request_new_buffer(chip, lx_stream);
1130                 if (err < 0)
1131                         dev_err(chip->card->dev,
1132                                 "cannot request new buffer for capture\n");
1133                 snd_pcm_period_elapsed(lx_stream->stream);
1134         }
1135
1136         if (notified_out_pipe_mask) {
1137                 struct lx_stream *lx_stream = &chip->playback_stream;
1138
1139                 dev_dbg(chip->card->dev,
1140                         "requesting audio transfer for playback\n");
1141                 err = lx_interrupt_request_new_buffer(chip, lx_stream);
1142                 if (err < 0)
1143                         dev_err(chip->card->dev,
1144                                 "cannot request new buffer for playback\n");
1145                 snd_pcm_period_elapsed(lx_stream->stream);
1146         }
1147
1148         return IRQ_HANDLED;
1149 }
1150
1151
1152 static void lx_irq_set(struct lx6464es *chip, int enable)
1153 {
1154         u32 reg = lx_plx_reg_read(chip, ePLX_IRQCS);
1155
1156         /* enable/disable interrupts
1157          *
1158          * Set the Doorbell and PCI interrupt enable bits
1159          *
1160          * */
1161         if (enable)
1162                 reg |=  (IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
1163         else
1164                 reg &= ~(IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
1165         lx_plx_reg_write(chip, ePLX_IRQCS, reg);
1166 }
1167
1168 void lx_irq_enable(struct lx6464es *chip)
1169 {
1170         dev_dbg(chip->card->dev, "->lx_irq_enable\n");
1171         lx_irq_set(chip, 1);
1172 }
1173
1174 void lx_irq_disable(struct lx6464es *chip)
1175 {
1176         dev_dbg(chip->card->dev, "->lx_irq_disable\n");
1177         lx_irq_set(chip, 0);
1178 }