sound/pci/bt87x.c

   1 /*
   2  * bt87x.c - Brooktree Bt878/Bt879 driver for ALSA
   3  *
   4  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   5  *
   6  * based on btaudio.c by Gerd Knorr <kraxel@bytesex.org>
   7  *
   8  *
   9  *  This driver is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This driver is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  */
  23
  24 #include <sound/driver.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/pci.h>
  28 #include <linux/slab.h>
  29 #include <linux/moduleparam.h>
  30 #include <asm/io.h>
  31 #include <asm/bitops.h>
  32 #include <sound/core.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/control.h>
  36 #include <sound/initval.h>
  37
  38 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  39 MODULE_DESCRIPTION("Brooktree Bt87x audio driver");
  40 MODULE_LICENSE("GPL");
  41 MODULE_CLASSES("{sound}");
  42 MODULE_DEVICES("{{Brooktree,Bt878},"
  43                 "{Brooktree,Bt879}}");
  44
  45 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  46 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  47 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  48 static int digital_rate[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 0 }; /* digital input rate */
  49 static int boot_devs;
  50
  51 module_param_array(index, int, boot_devs, 0444);
  52 MODULE_PARM_DESC(index, "Index value for Bt87x soundcard");
  53 MODULE_PARM_SYNTAX(index, SNDRV_INDEX_DESC);
  54 module_param_array(id, charp, boot_devs, 0444);
  55 MODULE_PARM_DESC(id, "ID string for Bt87x soundcard");
  56 MODULE_PARM_SYNTAX(id, SNDRV_ID_DESC);
  57 module_param_array(enable, bool, boot_devs, 0444);
  58 MODULE_PARM_DESC(enable, "Enable Bt87x soundcard");
  59 MODULE_PARM_SYNTAX(enable, SNDRV_ENABLE_DESC);
  60 module_param_array(digital_rate, int, boot_devs, 0444);
  61 MODULE_PARM_DESC(digital_rate, "Digital input rate for Bt87x soundcard");
  62 MODULE_PARM_SYNTAX(digital_rate, SNDRV_ENABLED);
  63
  64
  65 #ifndef PCI_VENDOR_ID_BROOKTREE
  66 #define PCI_VENDOR_ID_BROOKTREE 0x109e
  67 #endif
  68 #ifndef PCI_DEVICE_ID_BROOKTREE_878
  69 #define PCI_DEVICE_ID_BROOKTREE_878 0x0878
  70 #endif
  71 #ifndef PCI_DEVICE_ID_BROOKTREE_879
  72 #define PCI_DEVICE_ID_BROOKTREE_879 0x0879
  73 #endif
  74
  75 /* register offsets */
  76 #define REG_INT_STAT            0x100   /* interrupt status */
  77 #define REG_INT_MASK            0x104   /* interrupt mask */
  78 #define REG_GPIO_DMA_CTL        0x10c   /* audio control */
  79 #define REG_PACKET_LEN          0x110   /* audio packet lengths */
  80 #define REG_RISC_STRT_ADD       0x114   /* RISC program start address */
  81 #define REG_RISC_COUNT          0x120   /* RISC program counter */
  82
  83 /* interrupt bits */
  84 #define INT_OFLOW       (1 <<  3)       /* audio A/D overflow */
  85 #define INT_RISCI       (1 << 11)       /* RISC instruction IRQ bit set */
  86 #define INT_FBUS        (1 << 12)       /* FIFO overrun due to bus access latency */
  87 #define INT_FTRGT       (1 << 13)       /* FIFO overrun due to target latency */
  88 #define INT_FDSR        (1 << 14)       /* FIFO data stream resynchronization */
  89 #define INT_PPERR       (1 << 15)       /* PCI parity error */
  90 #define INT_RIPERR      (1 << 16)       /* RISC instruction parity error */
  91 #define INT_PABORT      (1 << 17)       /* PCI master or target abort */
  92 #define INT_OCERR       (1 << 18)       /* invalid opcode */
  93 #define INT_SCERR       (1 << 19)       /* sync counter overflow */
  94 #define INT_RISC_EN     (1 << 27)       /* DMA controller running */
  95 #define INT_RISCS_SHIFT       28        /* RISC status bits */
  96
  97 /* audio control bits */
  98 #define CTL_FIFO_ENABLE         (1 <<  0)       /* enable audio data FIFO */
  99 #define CTL_RISC_ENABLE         (1 <<  1)       /* enable audio DMA controller */
 100 #define CTL_PKTP_4              (0 <<  2)       /* packet mode FIFO trigger point - 4 DWORDs */
 101 #define CTL_PKTP_8              (1 <<  2)       /* 8 DWORDs */
 102 #define CTL_PKTP_16             (2 <<  2)       /* 16 DWORDs */
 103 #define CTL_ACAP_EN             (1 <<  4)       /* enable audio capture */
 104 #define CTL_DA_APP              (1 <<  5)       /* GPIO input */
 105 #define CTL_DA_IOM_AFE          (0 <<  6)       /* audio A/D input */
 106 #define CTL_DA_IOM_DA           (1 <<  6)       /* digital audio input */
 107 #define CTL_DA_SDR_SHIFT               8        /* DDF first stage decimation rate */
 108 #define CTL_DA_SDR_MASK         (0xf<< 8)
 109 #define CTL_DA_LMT              (1 << 12)       /* limit audio data values */
 110 #define CTL_DA_ES2              (1 << 13)       /* enable DDF stage 2 */
 111 #define CTL_DA_SBR              (1 << 14)       /* samples rounded to 8 bits */
 112 #define CTL_DA_DPM              (1 << 15)       /* data packet mode */
 113 #define CTL_DA_LRD_SHIFT              16        /* ALRCK delay */
 114 #define CTL_DA_MLB              (1 << 21)       /* MSB/LSB format */
 115 #define CTL_DA_LRI              (1 << 22)       /* left/right indication */
 116 #define CTL_DA_SCE              (1 << 23)       /* sample clock edge */
 117 #define CTL_A_SEL_STV           (0 << 24)       /* TV tuner audio input */
 118 #define CTL_A_SEL_SFM           (1 << 24)       /* FM audio input */
 119 #define CTL_A_SEL_SML           (2 << 24)       /* mic/line audio input */
 120 #define CTL_A_SEL_SMXC          (3 << 24)       /* MUX bypass */
 121 #define CTL_A_SEL_SHIFT               24
 122 #define CTL_A_SEL_MASK          (3 << 24)
 123 #define CTL_A_PWRDN             (1 << 26)       /* analog audio power-down */
 124 #define CTL_A_G2X               (1 << 27)       /* audio gain boost */
 125 #define CTL_A_GAIN_SHIFT              28        /* audio input gain */
 126 #define CTL_A_GAIN_MASK         (0xf<<28)
 127
 128 /* RISC instruction opcodes */
 129 #define RISC_WRITE      (0x1 << 28)     /* write FIFO data to memory at address */
 130 #define RISC_WRITEC     (0x5 << 28)     /* write FIFO data to memory at current address */
 131 #define RISC_SKIP       (0x2 << 28)     /* skip FIFO data */
 132 #define RISC_JUMP       (0x7 << 28)     /* jump to address */
 133 #define RISC_SYNC       (0x8 << 28)     /* synchronize with FIFO */
 134
 135 /* RISC instruction bits */
 136 #define RISC_BYTES_ENABLE       (0xf << 12)     /* byte enable bits */
 137 #define RISC_RESYNC             (  1 << 15)     /* disable FDSR errors */
 138 #define RISC_SET_STATUS_SHIFT           16      /* set status bits */
 139 #define RISC_RESET_STATUS_SHIFT         20      /* clear status bits */
 140 #define RISC_IRQ                (  1 << 24)     /* interrupt */
 141 #define RISC_EOL                (  1 << 26)     /* end of line */
 142 #define RISC_SOL                (  1 << 27)     /* start of line */
 143
 144 /* SYNC status bits values */
 145 #define RISC_SYNC_FM1   0x6
 146 #define RISC_SYNC_VRO   0xc
 147
 148 #define ERROR_INTERRUPTS (INT_FBUS | INT_FTRGT | INT_PPERR | \
 149                           INT_RIPERR | INT_PABORT | INT_OCERR)
 150 #define MY_INTERRUPTS (INT_RISCI | ERROR_INTERRUPTS)
 151
 152 /* SYNC, one WRITE per line, one extra WRITE per page boundary, SYNC, JUMP */
 153 #define MAX_RISC_SIZE ((1 + 255 + (PAGE_ALIGN(255 * 4092) / PAGE_SIZE - 1) + 1 + 1) * 8)
 154
 155 #define chip_t bt87x_t
 156 typedef struct snd_bt87x bt87x_t;
 157 struct snd_bt87x {
 158         snd_card_t *card;
 159         struct pci_dev *pci;
 160
 161         void *mmio;
 162         struct resource *res_mmio;
 163         int irq;
 164
 165         int dig_rate;
 166
 167         spinlock_t reg_lock;
 168         long opened;
 169         snd_pcm_substream_t *substream;
 170
 171         struct snd_dma_device dma_dev;
 172         struct snd_dma_buffer dma_risc;
 173         unsigned int line_bytes;
 174         unsigned int lines;
 175
 176         u32 reg_control;
 177         int current_line;
 178 };
 179
 180 enum { DEVICE_DIGITAL, DEVICE_ANALOG };
 181
 182 static inline u32 snd_bt87x_readl(bt87x_t *chip, u32 reg)
 183 {
 184         return readl(chip->mmio + reg);
 185 }
 186
 187 static inline void snd_bt87x_writel(bt87x_t *chip, u32 reg, u32 value)
 188 {
 189         writel(value, chip->mmio + reg);
 190 }
 191
 192 static int snd_bt87x_create_risc(bt87x_t *chip, snd_pcm_substream_t *substream,
 193                                  unsigned int periods, unsigned int period_bytes)
 194 {
 195         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 196         unsigned int i, offset;
 197         u32 *risc;
 198
 199         if (chip->dma_risc.area == NULL) {
 200                 memset(&chip->dma_dev, 0, sizeof(chip->dma_dev));
 201                 chip->dma_dev.type = SNDRV_DMA_TYPE_DEV;
 202                 chip->dma_dev.dev = snd_dma_pci_data(chip->pci);
 203                 if (snd_dma_alloc_pages(&chip->dma_dev, PAGE_ALIGN(MAX_RISC_SIZE), &chip->dma_risc) < 0)
 204                         return -ENOMEM;
 205         }
 206         risc = (u32 *)chip->dma_risc.area;
 207         offset = 0;
 208         *risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_FM1);
 209         *risc++ = cpu_to_le32(0);
 210         for (i = 0; i < periods; ++i) {
 211                 u32 rest;
 212
 213                 rest = period_bytes;
 214                 do {
 215                         u32 cmd, len;
 216
 217                         len = PAGE_SIZE - (offset % PAGE_SIZE);
 218                         if (len > rest)
 219                                 len = rest;
 220                         cmd = RISC_WRITE | len;
 221                         if (rest == period_bytes) {
 222                                 u32 block = i * 16 / periods;
 223                                 cmd |= RISC_SOL;
 224                                 cmd |= block << RISC_SET_STATUS_SHIFT;
 225                                 cmd |= (~block & 0xf) << RISC_RESET_STATUS_SHIFT;
 226                         }
 227                         if (len == rest)
 228                                 cmd |= RISC_EOL | RISC_IRQ;
 229                         *risc++ = cpu_to_le32(cmd);
 230                         *risc++ = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, offset));
 231                         offset += len;
 232                         rest -= len;
 233                 } while (rest > 0);
 234         }
 235         *risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_VRO);
 236         *risc++ = cpu_to_le32(0);
 237         *risc++ = cpu_to_le32(RISC_JUMP);
 238         *risc++ = cpu_to_le32(chip->dma_risc.addr);
 239         chip->line_bytes = period_bytes;
 240         chip->lines = periods;
 241         return 0;
 242 }
 243
 244 static void snd_bt87x_free_risc(bt87x_t *chip)
 245 {
 246         if (chip->dma_risc.area) {
 247                 snd_dma_free_pages(&chip->dma_dev, &chip->dma_risc);
 248                 chip->dma_risc.area = NULL;
 249         }
 250 }
 251
 252 static irqreturn_t snd_bt87x_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 253 {
 254         bt87x_t *chip = snd_magic_cast(bt87x_t, dev_id, return IRQ_NONE);
 255         unsigned int status;
 256
 257         status = snd_bt87x_readl(chip, REG_INT_STAT);
 258         if (!(status & MY_INTERRUPTS))
 259                 return IRQ_NONE;
 260         snd_bt87x_writel(chip, REG_INT_STAT, status & MY_INTERRUPTS);
 261
 262         if (status & ERROR_INTERRUPTS) {
 263                 if (status & (INT_FBUS | INT_FTRGT))
 264                         snd_printk(KERN_WARNING "FIFO overrun, status %#08x\n", status);
 265                 if (status & INT_OCERR)
 266                         snd_printk(KERN_ERR "internal RISC error, status %#08x\n", status);
 267                 if (status & (INT_PPERR | INT_RIPERR | INT_PABORT)) {
 268                         u16 pci_status;
 269                         pci_read_config_word(chip->pci, PCI_STATUS, &pci_status);
 270                         pci_write_config_word(chip->pci, PCI_STATUS, pci_status &
 271                                               (PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
 272                                                PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
 273                                                PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY));
 274                         snd_printk(KERN_ERR "Aieee - PCI error! status %#08x, PCI status %#04x\n",
 275                                    status, pci_status);
 276                 }
 277         }
 278         if (status & INT_RISCI) {
 279                 int current_block, irq_block;
 280
 281                 /* assume that exactly one line has been recorded */
 282                 chip->current_line = (chip->current_line + 1) % chip->lines;
 283                 /* but check if some interrupts have been skipped */
 284                 current_block = chip->current_line * 16 / chip->lines;
 285                 irq_block = status >> INT_RISCS_SHIFT;
 286                 if (current_block != irq_block)
 287                         chip->current_line = (irq_block * chip->lines + 15) / 16;
 288
 289                 snd_pcm_period_elapsed(chip->substream);
 290         }
 291         return IRQ_HANDLED;
 292 }
 293
 294 static snd_pcm_hardware_t snd_bt87x_digital_hw = {
 295         .info = SNDRV_PCM_INFO_MMAP |
 296                 SNDRV_PCM_INFO_INTERLEAVED |
 297                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 298                 SNDRV_PCM_INFO_MMAP_VALID,
 299         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 300         .rates = 0, /* set at runtime */
 301         .channels_min = 2,
 302         .channels_max = 2,
 303         .buffer_bytes_max = 255 * 4092,
 304         .period_bytes_min = 32,
 305         .period_bytes_max = 4092,
 306         .periods_min = 2,
 307         .periods_max = 255,
 308 };
 309
 310 static snd_pcm_hardware_t snd_bt87x_analog_hw = {
 311         .info = SNDRV_PCM_INFO_MMAP |
 312                 SNDRV_PCM_INFO_INTERLEAVED |
 313                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 314                 SNDRV_PCM_INFO_MMAP_VALID,
 315         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 316         .rates = SNDRV_PCM_RATE_KNOT,
 317         .rate_min = 119467,
 318         .rate_max = 448000,
 319         .channels_min = 1,
 320         .channels_max = 1,
 321         .buffer_bytes_max = 255 * 4092,
 322         .period_bytes_min = 32,
 323         .period_bytes_max = 4092,
 324         .periods_min = 2,
 325         .periods_max = 255,
 326 };
 327
 328 static int snd_bt87x_set_digital_hw(bt87x_t *chip, snd_pcm_runtime_t *runtime)
 329 {
 330         static struct {
 331                 int rate;
 332                 unsigned int bit;
 333         } ratebits[] = {
 334                 {8000, SNDRV_PCM_RATE_8000},
 335                 {11025, SNDRV_PCM_RATE_11025},
 336                 {16000, SNDRV_PCM_RATE_16000},
 337                 {22050, SNDRV_PCM_RATE_22050},
 338                 {32000, SNDRV_PCM_RATE_32000},
 339                 {44100, SNDRV_PCM_RATE_44100},
 340                 {48000, SNDRV_PCM_RATE_48000}
 341         };
 342         int i;
 343
 344         chip->reg_control |= CTL_DA_IOM_DA;
 345         runtime->hw = snd_bt87x_digital_hw;
 346         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
 347         for (i = 0; i < ARRAY_SIZE(ratebits); ++i)
 348                 if (chip->dig_rate == ratebits[i].rate) {
 349                         runtime->hw.rates = ratebits[i].bit;
 350                         break;
 351                 }
 352         runtime->hw.rate_min = chip->dig_rate;
 353         runtime->hw.rate_max = chip->dig_rate;
 354         return 0;
 355 }
 356
 357 static int snd_bt87x_set_analog_hw(bt87x_t *chip, snd_pcm_runtime_t *runtime)
 358 {
 359         static unsigned int rates[] = {
 360                 119467, 128000, 137846, 149333, 162909, 179200,
 361                 199111, 224000, 256000, 298667, 358400, 448000
 362         };
 363         static snd_pcm_hw_constraint_list_t constraint_rates = {
 364                 .count = ARRAY_SIZE(rates),
 365                 .list = rates,
 366                 .mask = 0,
 367         };
 368
 369         chip->reg_control &= ~CTL_DA_IOM_DA;
 370         runtime->hw = snd_bt87x_analog_hw;
 371         return snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 372                                           &constraint_rates);
 373 }
 374
 375 static int snd_bt87x_pcm_open(snd_pcm_substream_t *substream)
 376 {
 377         bt87x_t *chip = snd_pcm_substream_chip(substream);
 378         snd_pcm_runtime_t *runtime = substream->runtime;
 379         int err;
 380
 381         if (test_and_set_bit(0, &chip->opened))
 382                 return -EBUSY;
 383
 384         if (substream->pcm->device == DEVICE_DIGITAL)
 385                 err = snd_bt87x_set_digital_hw(chip, runtime);
 386         else
 387                 err = snd_bt87x_set_analog_hw(chip, runtime);
 388         if (err < 0)
 389                 goto _error;
 390
 391         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 392         if (err < 0)
 393                 goto _error;
 394
 395         chip->substream = substream;
 396         return 0;
 397
 398 _error:
 399         clear_bit(0, &chip->opened);
 400         smp_mb__after_clear_bit();
 401         return err;
 402 }
 403
 404 static int snd_bt87x_close(snd_pcm_substream_t *substream)
 405 {
 406         bt87x_t *chip = snd_pcm_substream_chip(substream);
 407
 408         chip->substream = NULL;
 409         clear_bit(0, &chip->opened);
 410         smp_mb__after_clear_bit();
 411         return 0;
 412 }
 413
 414 static int snd_bt87x_hw_params(snd_pcm_substream_t *substream,
 415                                snd_pcm_hw_params_t *hw_params)
 416 {
 417         bt87x_t *chip = snd_pcm_substream_chip(substream);
 418         int err;
 419
 420         err = snd_pcm_lib_malloc_pages(substream,
 421                                        params_buffer_bytes(hw_params));
 422         if (err < 0)
 423                 return err;
 424         return snd_bt87x_create_risc(chip, substream,
 425                                      params_periods(hw_params),
 426                                      params_period_bytes(hw_params));
 427 }
 428
 429 static int snd_bt87x_hw_free(snd_pcm_substream_t *substream)
 430 {
 431         bt87x_t *chip = snd_pcm_substream_chip(substream);
 432
 433         snd_bt87x_free_risc(chip);
 434         snd_pcm_lib_free_pages(substream);
 435         return 0;
 436 }
 437
 438 static int snd_bt87x_prepare(snd_pcm_substream_t *substream)
 439 {
 440         bt87x_t *chip = snd_pcm_substream_chip(substream);
 441         snd_pcm_runtime_t *runtime = substream->runtime;
 442         unsigned long flags;
 443         int decimation;
 444
 445         spin_lock_irqsave(&chip->reg_lock, flags);
 446         chip->reg_control &= ~(CTL_DA_SDR_MASK | CTL_DA_SBR);
 447         decimation = (1792000 + 5) / runtime->rate;
 448         chip->reg_control |= decimation << CTL_DA_SDR_SHIFT;
 449         if (runtime->format == SNDRV_PCM_FORMAT_S8)
 450                 chip->reg_control |= CTL_DA_SBR;
 451         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 452         spin_unlock_irqrestore(&chip->reg_lock, flags);
 453         return 0;
 454 }
 455
 456 static int snd_bt87x_start(bt87x_t *chip)
 457 {
 458         unsigned long flags;
 459
 460         spin_lock_irqsave(&chip->reg_lock, flags);
 461         chip->current_line = 0;
 462         chip->reg_control |= CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN;
 463         snd_bt87x_writel(chip, REG_RISC_STRT_ADD, chip->dma_risc.addr);
 464         snd_bt87x_writel(chip, REG_PACKET_LEN,
 465                          chip->line_bytes | (chip->lines << 16));
 466         snd_bt87x_writel(chip, REG_INT_MASK, MY_INTERRUPTS);
 467         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 468         spin_unlock_irqrestore(&chip->reg_lock, flags);
 469         return 0;
 470 }
 471
 472 static int snd_bt87x_stop(bt87x_t *chip)
 473 {
 474         unsigned long flags;
 475
 476         spin_lock_irqsave(&chip->reg_lock, flags);
 477         chip->reg_control &= ~(CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN);
 478         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 479         snd_bt87x_writel(chip, REG_INT_MASK, 0);
 480         snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
 481         spin_unlock_irqrestore(&chip->reg_lock, flags);
 482         return 0;
 483 }
 484
 485 static int snd_bt87x_trigger(snd_pcm_substream_t *substream, int cmd)
 486 {
 487         bt87x_t *chip = snd_pcm_substream_chip(substream);
 488
 489         switch (cmd) {
 490         case SNDRV_PCM_TRIGGER_START:
 491                 return snd_bt87x_start(chip);
 492         case SNDRV_PCM_TRIGGER_STOP:
 493                 return snd_bt87x_stop(chip);
 494         default:
 495                 return -EINVAL;
 496         }
 497 }
 498
 499 static snd_pcm_uframes_t snd_bt87x_pointer(snd_pcm_substream_t *substream)
 500 {
 501         bt87x_t *chip = snd_pcm_substream_chip(substream);
 502         snd_pcm_runtime_t *runtime = substream->runtime;
 503
 504         return (snd_pcm_uframes_t)bytes_to_frames(runtime, chip->current_line * chip->line_bytes);
 505 }
 506
 507 static snd_pcm_ops_t snd_bt87x_pcm_ops = {
 508         .open = snd_bt87x_pcm_open,
 509         .close = snd_bt87x_close,
 510         .ioctl = snd_pcm_lib_ioctl,
 511         .hw_params = snd_bt87x_hw_params,
 512         .hw_free = snd_bt87x_hw_free,
 513         .prepare = snd_bt87x_prepare,
 514         .trigger = snd_bt87x_trigger,
 515         .pointer = snd_bt87x_pointer,
 516         .page = snd_pcm_sgbuf_ops_page,
 517 };
 518
 519 static int snd_bt87x_capture_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 520 {
 521         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 522         info->count = 1;
 523         info->value.integer.min = 0;
 524         info->value.integer.max = 15;
 525         return 0;
 526 }
 527
 528 static int snd_bt87x_capture_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 529 {
 530         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 531
 532         value->value.integer.value[0] = (chip->reg_control & CTL_A_GAIN_MASK) >> CTL_A_GAIN_SHIFT;
 533         return 0;
 534 }
 535
 536 static int snd_bt87x_capture_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 537 {
 538         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 539         unsigned long flags;
 540         u32 old_control;
 541         int changed;
 542
 543         spin_lock_irqsave(&chip->reg_lock, flags);
 544         old_control = chip->reg_control;
 545         chip->reg_control = (chip->reg_control & ~CTL_A_GAIN_MASK)
 546                 | (value->value.integer.value[0] << CTL_A_GAIN_SHIFT);
 547         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 548         changed = old_control != chip->reg_control;
 549         spin_unlock_irqrestore(&chip->reg_lock, flags);
 550         return changed;
 551 }
 552
 553 static snd_kcontrol_new_t snd_bt87x_capture_volume = {
 554         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 555         .name = "Capture Volume",
 556         .info = snd_bt87x_capture_volume_info,
 557         .get = snd_bt87x_capture_volume_get,
 558         .put = snd_bt87x_capture_volume_put,
 559 };
 560
 561 static int snd_bt87x_capture_boost_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 562 {
 563         info->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 564         info->count = 1;
 565         info->value.integer.min = 0;
 566         info->value.integer.max = 1;
 567         return 0;
 568 }
 569
 570 static int snd_bt87x_capture_boost_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 571 {
 572         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 573
 574         value->value.integer.value[0] = !! (chip->reg_control & CTL_A_G2X);
 575         return 0;
 576 }
 577
 578 static int snd_bt87x_capture_boost_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 579 {
 580         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 581         unsigned long flags;
 582         u32 old_control;
 583         int changed;
 584
 585         spin_lock_irqsave(&chip->reg_lock, flags);
 586         old_control = chip->reg_control;
 587         chip->reg_control = (chip->reg_control & ~CTL_A_G2X)
 588                 | (value->value.integer.value[0] ? CTL_A_G2X : 0);
 589         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 590         changed = chip->reg_control != old_control;
 591         spin_unlock_irqrestore(&chip->reg_lock, flags);
 592         return changed;
 593 }
 594
 595 static snd_kcontrol_new_t snd_bt87x_capture_boost = {
 596         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 597         .name = "Capture Boost",
 598         .info = snd_bt87x_capture_boost_info,
 599         .get = snd_bt87x_capture_boost_get,
 600         .put = snd_bt87x_capture_boost_put,
 601 };
 602
 603 static int snd_bt87x_capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 604 {
 605         static char *texts[3] = {"TV Tuner", "FM", "Mic/Line"};
 606
 607         info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 608         info->count = 1;
 609         info->value.enumerated.items = 3;
 610         if (info->value.enumerated.item > 2)
 611                 info->value.enumerated.item = 2;
 612         strcpy(info->value.enumerated.name, texts[info->value.enumerated.item]);
 613         return 0;
 614 }
 615
 616 static int snd_bt87x_capture_source_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 617 {
 618         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 619
 620         value->value.enumerated.item[0] = (chip->reg_control & CTL_A_SEL_MASK) >> CTL_A_SEL_SHIFT;
 621         return 0;
 622 }
 623
 624 static int snd_bt87x_capture_source_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 625 {
 626         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 627         unsigned long flags;
 628         u32 old_control;
 629         int changed;
 630
 631         spin_lock_irqsave(&chip->reg_lock, flags);
 632         old_control = chip->reg_control;
 633         chip->reg_control = (chip->reg_control & ~CTL_A_SEL_MASK)
 634                 | (value->value.enumerated.item[0] << CTL_A_SEL_SHIFT);
 635         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 636         changed = chip->reg_control != old_control;
 637         spin_unlock_irqrestore(&chip->reg_lock, flags);
 638         return changed;
 639 }
 640
 641 static snd_kcontrol_new_t snd_bt87x_capture_source = {
 642         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 643         .name = "Capture Source",
 644         .info = snd_bt87x_capture_source_info,
 645         .get = snd_bt87x_capture_source_get,
 646         .put = snd_bt87x_capture_source_put,
 647 };
 648
 649 static int snd_bt87x_free(bt87x_t *chip)
 650 {
 651         if (chip->mmio) {
 652                 snd_bt87x_stop(chip);
 653                 if (chip->irq >= 0)
 654                         synchronize_irq(chip->irq);
 655
 656                 iounmap(chip->mmio);
 657         }
 658         if (chip->res_mmio) {
 659                 release_resource(chip->res_mmio);
 660                 kfree_nocheck(chip->res_mmio);
 661         }
 662         if (chip->irq >= 0)
 663                 free_irq(chip->irq, chip);
 664         snd_magic_kfree(chip);
 665         return 0;
 666 }
 667
 668 static int snd_bt87x_dev_free(snd_device_t *device)
 669 {
 670         bt87x_t *chip = snd_magic_cast(bt87x_t, device->device_data, return -ENXIO);
 671         return snd_bt87x_free(chip);
 672 }
 673
 674 static int __devinit snd_bt87x_pcm(bt87x_t *chip, int device, char *name)
 675 {
 676         int err;
 677         snd_pcm_t *pcm;
 678
 679         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 680         if (err < 0)
 681                 return err;
 682         pcm->private_data = chip;
 683         strcpy(pcm->name, name);
 684         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_bt87x_pcm_ops);
 685         return snd_pcm_lib_preallocate_pages_for_all(pcm,
 686                                                      SNDRV_DMA_TYPE_DEV_SG,
 687                                                      snd_dma_pci_data(chip->pci),
 688                                                         128 * 1024,
 689                                                         (255 * 4092 + 1023) & ~1023);
 690 }
 691
 692 static int __devinit snd_bt87x_create(snd_card_t *card,
 693                                       struct pci_dev *pci,
 694                                       bt87x_t **rchip)
 695 {
 696         bt87x_t *chip;
 697         int err;
 698         static snd_device_ops_t ops = {
 699                 .dev_free = snd_bt87x_dev_free
 700         };
 701
 702         *rchip = NULL;
 703
 704         err = pci_enable_device(pci);
 705         if (err < 0)
 706                 return err;
 707
 708         chip = snd_magic_kcalloc(bt87x_t, 0, GFP_KERNEL);
 709         if (!chip)
 710                 return -ENOMEM;
 711         chip->card = card;
 712         chip->pci = pci;
 713         chip->irq = -1;
 714         spin_lock_init(&chip->reg_lock);
 715
 716         chip->res_mmio = request_mem_region(pci_resource_start(pci, 0),
 717                                             pci_resource_len(pci, 0),
 718                                             "Bt87x audio");
 719         if (!chip->res_mmio) {
 720                 snd_bt87x_free(chip);
 721                 snd_printk(KERN_ERR "cannot allocate io memory\n");
 722                 return -EBUSY;
 723         }
 724         chip->mmio = ioremap_nocache(pci_resource_start(pci, 0),
 725                                      pci_resource_len(pci, 0));
 726         if (!chip->mmio) {
 727                 snd_bt87x_free(chip);
 728                 snd_printk(KERN_ERR "cannot remap io memory\n");
 729                 return -ENOMEM;
 730         }
 731
 732         chip->reg_control = CTL_DA_ES2 | CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT);
 733         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 734         snd_bt87x_writel(chip, REG_INT_MASK, 0);
 735         snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
 736
 737         if (request_irq(pci->irq, snd_bt87x_interrupt, SA_INTERRUPT | SA_SHIRQ,
 738                         "Bt87x audio", chip)) {
 739                 snd_bt87x_free(chip);
 740                 snd_printk(KERN_ERR "cannot grab irq\n");
 741                 return -EBUSY;
 742         }
 743         chip->irq = pci->irq;
 744         pci_set_master(pci);
 745         synchronize_irq(chip->irq);
 746
 747         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 748         if (err < 0) {
 749                 snd_bt87x_free(chip);
 750                 return err;
 751         }
 752         snd_card_set_dev(card, &pci->dev);
 753         *rchip = chip;
 754         return 0;
 755 }
 756
 757 static int __devinit snd_bt87x_probe(struct pci_dev *pci,
 758                                      const struct pci_device_id *pci_id)
 759 {
 760         static int dev;
 761         snd_card_t *card;
 762         bt87x_t *chip;
 763         int err;
 764
 765         if (dev >= SNDRV_CARDS)
 766                 return -ENODEV;
 767         if (!enable[dev]) {
 768                 ++dev;
 769                 return -ENOENT;
 770         }
 771
 772         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 773         if (!card)
 774                 return -ENOMEM;
 775
 776         err = snd_bt87x_create(card, pci, &chip);
 777         if (err < 0)
 778                 goto _error;
 779
 780         if (digital_rate[dev] > 0)
 781                 chip->dig_rate = digital_rate[dev];
 782         else
 783                 chip->dig_rate = (int)pci_id->driver_data;
 784
 785         err = snd_bt87x_pcm(chip, DEVICE_DIGITAL, "Bt87x Digital");
 786         if (err < 0)
 787                 goto _error;
 788         err = snd_bt87x_pcm(chip, DEVICE_ANALOG, "Bt87x Analog");
 789         if (err < 0)
 790                 goto _error;
 791
 792         err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_volume, chip));
 793         if (err < 0)
 794                 goto _error;
 795         err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_boost, chip));
 796         if (err < 0)
 797                 goto _error;
 798         err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_source, chip));
 799         if (err < 0)
 800                 goto _error;
 801
 802         strcpy(card->driver, "Bt87x");
 803         sprintf(card->shortname, "Brooktree Bt%x", pci->device);
 804         sprintf(card->longname, "%s at %#lx, irq %i",
 805                 card->shortname, pci_resource_start(pci, 0), chip->irq);
 806         strcpy(card->mixername, "Bt87x");
 807
 808         err = snd_card_register(card);
 809         if (err < 0)
 810                 goto _error;
 811
 812         pci_set_drvdata(pci, card);
 813         ++dev;
 814         return 0;
 815
 816 _error:
 817         snd_card_free(card);
 818         return err;
 819 }
 820
 821 static void __devexit snd_bt87x_remove(struct pci_dev *pci)
 822 {
 823         snd_card_free(pci_get_drvdata(pci));
 824         pci_set_drvdata(pci, NULL);
 825 }
 826
 827 #define BT_DEVICE(chip, subvend, subdev, rate) \
 828         { .vendor = PCI_VENDOR_ID_BROOKTREE, \
 829           .device = PCI_DEVICE_ID_BROOKTREE_##chip, \
 830           .subvendor = subvend, .subdevice = subdev, \
 831           .driver_data = rate }
 832
 833 /* driver_data is the default digital_rate value for that device */
 834 static struct pci_device_id snd_bt87x_ids[] = {
 835         BT_DEVICE(878, 0x0070, 0xff01, 44100), /* Osprey 200 */
 836
 837         /* default entries for 32kHz and generic Bt87x cards */
 838         BT_DEVICE(878, PCI_ANY_ID, PCI_ANY_ID, 32000),
 839         BT_DEVICE(879, PCI_ANY_ID, PCI_ANY_ID, 32000),
 840         { }
 841 };
 842 MODULE_DEVICE_TABLE(pci, snd_bt87x_ids);
 843
 844 static struct pci_driver driver = {
 845         .name = "Bt87x",
 846         .id_table = snd_bt87x_ids,
 847         .probe = snd_bt87x_probe,
 848         .remove = __devexit_p(snd_bt87x_remove),
 849 };
 850
 851 static int __init alsa_card_bt87x_init(void)
 852 {
 853         return pci_module_init(&driver);
 854 }
 855
 856 static void __exit alsa_card_bt87x_exit(void)
 857 {
 858         pci_unregister_driver(&driver);
 859 }
 860
 861 module_init(alsa_card_bt87x_init)
 862 module_exit(alsa_card_bt87x_exit)