git.oblomov.eu Git - linux-2.6/blob - 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 <linux/bitops.h>
  31 #include <asm/io.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_SUPPORTED_DEVICE("{{Brooktree,Bt878},"
  42                 "{Brooktree,Bt879}}");
  43
  44 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
  45 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  46 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  47 static int digital_rate[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 0 }; /* digital input rate */
  48 static int load_all;    /* allow to load the non-whitelisted cards */
  49
  50 module_param_array(index, int, NULL, 0444);
  51 MODULE_PARM_DESC(index, "Index value for Bt87x soundcard");
  52 module_param_array(id, charp, NULL, 0444);
  53 MODULE_PARM_DESC(id, "ID string for Bt87x soundcard");
  54 module_param_array(enable, bool, NULL, 0444);
  55 MODULE_PARM_DESC(enable, "Enable Bt87x soundcard");
  56 module_param_array(digital_rate, int, NULL, 0444);
  57 MODULE_PARM_DESC(digital_rate, "Digital input rate for Bt87x soundcard");
  58 module_param(load_all, bool, 0444);
  59 MODULE_PARM_DESC(load_all, "Allow to load the non-whitelisted cards");
  60
  61
  62 #ifndef PCI_VENDOR_ID_BROOKTREE
  63 #define PCI_VENDOR_ID_BROOKTREE 0x109e
  64 #endif
  65 #ifndef PCI_DEVICE_ID_BROOKTREE_878
  66 #define PCI_DEVICE_ID_BROOKTREE_878 0x0878
  67 #endif
  68 #ifndef PCI_DEVICE_ID_BROOKTREE_879
  69 #define PCI_DEVICE_ID_BROOKTREE_879 0x0879
  70 #endif
  71
  72 /* register offsets */
  73 #define REG_INT_STAT            0x100   /* interrupt status */
  74 #define REG_INT_MASK            0x104   /* interrupt mask */
  75 #define REG_GPIO_DMA_CTL        0x10c   /* audio control */
  76 #define REG_PACKET_LEN          0x110   /* audio packet lengths */
  77 #define REG_RISC_STRT_ADD       0x114   /* RISC program start address */
  78 #define REG_RISC_COUNT          0x120   /* RISC program counter */
  79
  80 /* interrupt bits */
  81 #define INT_OFLOW       (1 <<  3)       /* audio A/D overflow */
  82 #define INT_RISCI       (1 << 11)       /* RISC instruction IRQ bit set */
  83 #define INT_FBUS        (1 << 12)       /* FIFO overrun due to bus access latency */
  84 #define INT_FTRGT       (1 << 13)       /* FIFO overrun due to target latency */
  85 #define INT_FDSR        (1 << 14)       /* FIFO data stream resynchronization */
  86 #define INT_PPERR       (1 << 15)       /* PCI parity error */
  87 #define INT_RIPERR      (1 << 16)       /* RISC instruction parity error */
  88 #define INT_PABORT      (1 << 17)       /* PCI master or target abort */
  89 #define INT_OCERR       (1 << 18)       /* invalid opcode */
  90 #define INT_SCERR       (1 << 19)       /* sync counter overflow */
  91 #define INT_RISC_EN     (1 << 27)       /* DMA controller running */
  92 #define INT_RISCS_SHIFT       28        /* RISC status bits */
  93
  94 /* audio control bits */
  95 #define CTL_FIFO_ENABLE         (1 <<  0)       /* enable audio data FIFO */
  96 #define CTL_RISC_ENABLE         (1 <<  1)       /* enable audio DMA controller */
  97 #define CTL_PKTP_4              (0 <<  2)       /* packet mode FIFO trigger point - 4 DWORDs */
  98 #define CTL_PKTP_8              (1 <<  2)       /* 8 DWORDs */
  99 #define CTL_PKTP_16             (2 <<  2)       /* 16 DWORDs */
 100 #define CTL_ACAP_EN             (1 <<  4)       /* enable audio capture */
 101 #define CTL_DA_APP              (1 <<  5)       /* GPIO input */
 102 #define CTL_DA_IOM_AFE          (0 <<  6)       /* audio A/D input */
 103 #define CTL_DA_IOM_DA           (1 <<  6)       /* digital audio input */
 104 #define CTL_DA_SDR_SHIFT               8        /* DDF first stage decimation rate */
 105 #define CTL_DA_SDR_MASK         (0xf<< 8)
 106 #define CTL_DA_LMT              (1 << 12)       /* limit audio data values */
 107 #define CTL_DA_ES2              (1 << 13)       /* enable DDF stage 2 */
 108 #define CTL_DA_SBR              (1 << 14)       /* samples rounded to 8 bits */
 109 #define CTL_DA_DPM              (1 << 15)       /* data packet mode */
 110 #define CTL_DA_LRD_SHIFT              16        /* ALRCK delay */
 111 #define CTL_DA_MLB              (1 << 21)       /* MSB/LSB format */
 112 #define CTL_DA_LRI              (1 << 22)       /* left/right indication */
 113 #define CTL_DA_SCE              (1 << 23)       /* sample clock edge */
 114 #define CTL_A_SEL_STV           (0 << 24)       /* TV tuner audio input */
 115 #define CTL_A_SEL_SFM           (1 << 24)       /* FM audio input */
 116 #define CTL_A_SEL_SML           (2 << 24)       /* mic/line audio input */
 117 #define CTL_A_SEL_SMXC          (3 << 24)       /* MUX bypass */
 118 #define CTL_A_SEL_SHIFT               24
 119 #define CTL_A_SEL_MASK          (3 << 24)
 120 #define CTL_A_PWRDN             (1 << 26)       /* analog audio power-down */
 121 #define CTL_A_G2X               (1 << 27)       /* audio gain boost */
 122 #define CTL_A_GAIN_SHIFT              28        /* audio input gain */
 123 #define CTL_A_GAIN_MASK         (0xf<<28)
 124
 125 /* RISC instruction opcodes */
 126 #define RISC_WRITE      (0x1 << 28)     /* write FIFO data to memory at address */
 127 #define RISC_WRITEC     (0x5 << 28)     /* write FIFO data to memory at current address */
 128 #define RISC_SKIP       (0x2 << 28)     /* skip FIFO data */
 129 #define RISC_JUMP       (0x7 << 28)     /* jump to address */
 130 #define RISC_SYNC       (0x8 << 28)     /* synchronize with FIFO */
 131
 132 /* RISC instruction bits */
 133 #define RISC_BYTES_ENABLE       (0xf << 12)     /* byte enable bits */
 134 #define RISC_RESYNC             (  1 << 15)     /* disable FDSR errors */
 135 #define RISC_SET_STATUS_SHIFT           16      /* set status bits */
 136 #define RISC_RESET_STATUS_SHIFT         20      /* clear status bits */
 137 #define RISC_IRQ                (  1 << 24)     /* interrupt */
 138 #define RISC_EOL                (  1 << 26)     /* end of line */
 139 #define RISC_SOL                (  1 << 27)     /* start of line */
 140
 141 /* SYNC status bits values */
 142 #define RISC_SYNC_FM1   0x6
 143 #define RISC_SYNC_VRO   0xc
 144
 145 #define ANALOG_CLOCK 1792000
 146 #ifdef CONFIG_SND_BT87X_OVERCLOCK
 147 #define CLOCK_DIV_MIN 1
 148 #else
 149 #define CLOCK_DIV_MIN 4
 150 #endif
 151 #define CLOCK_DIV_MAX 15
 152
 153 #define ERROR_INTERRUPTS (INT_FBUS | INT_FTRGT | INT_PPERR | \
 154                           INT_RIPERR | INT_PABORT | INT_OCERR)
 155 #define MY_INTERRUPTS (INT_RISCI | ERROR_INTERRUPTS)
 156
 157 /* SYNC, one WRITE per line, one extra WRITE per page boundary, SYNC, JUMP */
 158 #define MAX_RISC_SIZE ((1 + 255 + (PAGE_ALIGN(255 * 4092) / PAGE_SIZE - 1) + 1 + 1) * 8)
 159
 160 typedef struct snd_bt87x bt87x_t;
 161 struct snd_bt87x {
 162         snd_card_t *card;
 163         struct pci_dev *pci;
 164
 165         void __iomem *mmio;
 166         int irq;
 167
 168         int dig_rate;
 169
 170         spinlock_t reg_lock;
 171         long opened;
 172         snd_pcm_substream_t *substream;
 173
 174         struct snd_dma_buffer dma_risc;
 175         unsigned int line_bytes;
 176         unsigned int lines;
 177
 178         u32 reg_control;
 179         u32 interrupt_mask;
 180
 181         int current_line;
 182
 183         int pci_parity_errors;
 184 };
 185
 186 enum { DEVICE_DIGITAL, DEVICE_ANALOG };
 187
 188 static inline u32 snd_bt87x_readl(bt87x_t *chip, u32 reg)
 189 {
 190         return readl(chip->mmio + reg);
 191 }
 192
 193 static inline void snd_bt87x_writel(bt87x_t *chip, u32 reg, u32 value)
 194 {
 195         writel(value, chip->mmio + reg);
 196 }
 197
 198 static int snd_bt87x_create_risc(bt87x_t *chip, snd_pcm_substream_t *substream,
 199                                  unsigned int periods, unsigned int period_bytes)
 200 {
 201         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 202         unsigned int i, offset;
 203         u32 *risc;
 204
 205         if (chip->dma_risc.area == NULL) {
 206                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 207                                         PAGE_ALIGN(MAX_RISC_SIZE), &chip->dma_risc) < 0)
 208                         return -ENOMEM;
 209         }
 210         risc = (u32 *)chip->dma_risc.area;
 211         offset = 0;
 212         *risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_FM1);
 213         *risc++ = cpu_to_le32(0);
 214         for (i = 0; i < periods; ++i) {
 215                 u32 rest;
 216
 217                 rest = period_bytes;
 218                 do {
 219                         u32 cmd, len;
 220
 221                         len = PAGE_SIZE - (offset % PAGE_SIZE);
 222                         if (len > rest)
 223                                 len = rest;
 224                         cmd = RISC_WRITE | len;
 225                         if (rest == period_bytes) {
 226                                 u32 block = i * 16 / periods;
 227                                 cmd |= RISC_SOL;
 228                                 cmd |= block << RISC_SET_STATUS_SHIFT;
 229                                 cmd |= (~block & 0xf) << RISC_RESET_STATUS_SHIFT;
 230                         }
 231                         if (len == rest)
 232                                 cmd |= RISC_EOL | RISC_IRQ;
 233                         *risc++ = cpu_to_le32(cmd);
 234                         *risc++ = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, offset));
 235                         offset += len;
 236                         rest -= len;
 237                 } while (rest > 0);
 238         }
 239         *risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_VRO);
 240         *risc++ = cpu_to_le32(0);
 241         *risc++ = cpu_to_le32(RISC_JUMP);
 242         *risc++ = cpu_to_le32(chip->dma_risc.addr);
 243         chip->line_bytes = period_bytes;
 244         chip->lines = periods;
 245         return 0;
 246 }
 247
 248 static void snd_bt87x_free_risc(bt87x_t *chip)
 249 {
 250         if (chip->dma_risc.area) {
 251                 snd_dma_free_pages(&chip->dma_risc);
 252                 chip->dma_risc.area = NULL;
 253         }
 254 }
 255
 256 static void snd_bt87x_pci_error(bt87x_t *chip, unsigned int status)
 257 {
 258         u16 pci_status;
 259
 260         pci_read_config_word(chip->pci, PCI_STATUS, &pci_status);
 261         pci_status &= PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
 262                 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
 263                 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY;
 264         pci_write_config_word(chip->pci, PCI_STATUS, pci_status);
 265         if (pci_status != PCI_STATUS_DETECTED_PARITY)
 266                 snd_printk(KERN_ERR "Aieee - PCI error! status %#08x, PCI status %#04x\n",
 267                            status & ERROR_INTERRUPTS, pci_status);
 268         else {
 269                 snd_printk(KERN_ERR "Aieee - PCI parity error detected!\n");
 270                 /* error 'handling' similar to aic7xxx_pci.c: */
 271                 chip->pci_parity_errors++;
 272                 if (chip->pci_parity_errors > 20) {
 273                         snd_printk(KERN_ERR "Too many PCI parity errors observed.\n");
 274                         snd_printk(KERN_ERR "Some device on this bus is generating bad parity.\n");
 275                         snd_printk(KERN_ERR "This is an error *observed by*, not *generated by*, this card.\n");
 276                         snd_printk(KERN_ERR "PCI parity error checking has been disabled.\n");
 277                         chip->interrupt_mask &= ~(INT_PPERR | INT_RIPERR);
 278                         snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
 279                 }
 280         }
 281 }
 282
 283 static irqreturn_t snd_bt87x_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 284 {
 285         bt87x_t *chip = dev_id;
 286         unsigned int status, irq_status;
 287
 288         status = snd_bt87x_readl(chip, REG_INT_STAT);
 289         irq_status = status & chip->interrupt_mask;
 290         if (!irq_status)
 291                 return IRQ_NONE;
 292         snd_bt87x_writel(chip, REG_INT_STAT, irq_status);
 293
 294         if (irq_status & ERROR_INTERRUPTS) {
 295                 if (irq_status & (INT_FBUS | INT_FTRGT))
 296                         snd_printk(KERN_WARNING "FIFO overrun, status %#08x\n", status);
 297                 if (irq_status & INT_OCERR)
 298                         snd_printk(KERN_ERR "internal RISC error, status %#08x\n", status);
 299                 if (irq_status & (INT_PPERR | INT_RIPERR | INT_PABORT))
 300                         snd_bt87x_pci_error(chip, irq_status);
 301         }
 302         if ((irq_status & INT_RISCI) && (chip->reg_control & CTL_ACAP_EN)) {
 303                 int current_block, irq_block;
 304
 305                 /* assume that exactly one line has been recorded */
 306                 chip->current_line = (chip->current_line + 1) % chip->lines;
 307                 /* but check if some interrupts have been skipped */
 308                 current_block = chip->current_line * 16 / chip->lines;
 309                 irq_block = status >> INT_RISCS_SHIFT;
 310                 if (current_block != irq_block)
 311                         chip->current_line = (irq_block * chip->lines + 15) / 16;
 312
 313                 snd_pcm_period_elapsed(chip->substream);
 314         }
 315         return IRQ_HANDLED;
 316 }
 317
 318 static snd_pcm_hardware_t snd_bt87x_digital_hw = {
 319         .info = SNDRV_PCM_INFO_MMAP |
 320                 SNDRV_PCM_INFO_INTERLEAVED |
 321                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 322                 SNDRV_PCM_INFO_MMAP_VALID,
 323         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 324         .rates = 0, /* set at runtime */
 325         .channels_min = 2,
 326         .channels_max = 2,
 327         .buffer_bytes_max = 255 * 4092,
 328         .period_bytes_min = 32,
 329         .period_bytes_max = 4092,
 330         .periods_min = 2,
 331         .periods_max = 255,
 332 };
 333
 334 static snd_pcm_hardware_t snd_bt87x_analog_hw = {
 335         .info = SNDRV_PCM_INFO_MMAP |
 336                 SNDRV_PCM_INFO_INTERLEAVED |
 337                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 338                 SNDRV_PCM_INFO_MMAP_VALID,
 339         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
 340         .rates = SNDRV_PCM_RATE_KNOT,
 341         .rate_min = ANALOG_CLOCK / CLOCK_DIV_MAX,
 342         .rate_max = ANALOG_CLOCK / CLOCK_DIV_MIN,
 343         .channels_min = 1,
 344         .channels_max = 1,
 345         .buffer_bytes_max = 255 * 4092,
 346         .period_bytes_min = 32,
 347         .period_bytes_max = 4092,
 348         .periods_min = 2,
 349         .periods_max = 255,
 350 };
 351
 352 static int snd_bt87x_set_digital_hw(bt87x_t *chip, snd_pcm_runtime_t *runtime)
 353 {
 354         static struct {
 355                 int rate;
 356                 unsigned int bit;
 357         } ratebits[] = {
 358                 {8000, SNDRV_PCM_RATE_8000},
 359                 {11025, SNDRV_PCM_RATE_11025},
 360                 {16000, SNDRV_PCM_RATE_16000},
 361                 {22050, SNDRV_PCM_RATE_22050},
 362                 {32000, SNDRV_PCM_RATE_32000},
 363                 {44100, SNDRV_PCM_RATE_44100},
 364                 {48000, SNDRV_PCM_RATE_48000}
 365         };
 366         int i;
 367
 368         chip->reg_control |= CTL_DA_IOM_DA;
 369         runtime->hw = snd_bt87x_digital_hw;
 370         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
 371         for (i = 0; i < ARRAY_SIZE(ratebits); ++i)
 372                 if (chip->dig_rate == ratebits[i].rate) {
 373                         runtime->hw.rates = ratebits[i].bit;
 374                         break;
 375                 }
 376         runtime->hw.rate_min = chip->dig_rate;
 377         runtime->hw.rate_max = chip->dig_rate;
 378         return 0;
 379 }
 380
 381 static int snd_bt87x_set_analog_hw(bt87x_t *chip, snd_pcm_runtime_t *runtime)
 382 {
 383         static ratnum_t analog_clock = {
 384                 .num = ANALOG_CLOCK,
 385                 .den_min = CLOCK_DIV_MIN,
 386                 .den_max = CLOCK_DIV_MAX,
 387                 .den_step = 1
 388         };
 389         static snd_pcm_hw_constraint_ratnums_t constraint_rates = {
 390                 .nrats = 1,
 391                 .rats = &analog_clock
 392         };
 393
 394         chip->reg_control &= ~CTL_DA_IOM_DA;
 395         runtime->hw = snd_bt87x_analog_hw;
 396         return snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 397                                              &constraint_rates);
 398 }
 399
 400 static int snd_bt87x_pcm_open(snd_pcm_substream_t *substream)
 401 {
 402         bt87x_t *chip = snd_pcm_substream_chip(substream);
 403         snd_pcm_runtime_t *runtime = substream->runtime;
 404         int err;
 405
 406         if (test_and_set_bit(0, &chip->opened))
 407                 return -EBUSY;
 408
 409         if (substream->pcm->device == DEVICE_DIGITAL)
 410                 err = snd_bt87x_set_digital_hw(chip, runtime);
 411         else
 412                 err = snd_bt87x_set_analog_hw(chip, runtime);
 413         if (err < 0)
 414                 goto _error;
 415
 416         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 417         if (err < 0)
 418                 goto _error;
 419
 420         chip->substream = substream;
 421         return 0;
 422
 423 _error:
 424         clear_bit(0, &chip->opened);
 425         smp_mb__after_clear_bit();
 426         return err;
 427 }
 428
 429 static int snd_bt87x_close(snd_pcm_substream_t *substream)
 430 {
 431         bt87x_t *chip = snd_pcm_substream_chip(substream);
 432
 433         chip->substream = NULL;
 434         clear_bit(0, &chip->opened);
 435         smp_mb__after_clear_bit();
 436         return 0;
 437 }
 438
 439 static int snd_bt87x_hw_params(snd_pcm_substream_t *substream,
 440                                snd_pcm_hw_params_t *hw_params)
 441 {
 442         bt87x_t *chip = snd_pcm_substream_chip(substream);
 443         int err;
 444
 445         err = snd_pcm_lib_malloc_pages(substream,
 446                                        params_buffer_bytes(hw_params));
 447         if (err < 0)
 448                 return err;
 449         return snd_bt87x_create_risc(chip, substream,
 450                                      params_periods(hw_params),
 451                                      params_period_bytes(hw_params));
 452 }
 453
 454 static int snd_bt87x_hw_free(snd_pcm_substream_t *substream)
 455 {
 456         bt87x_t *chip = snd_pcm_substream_chip(substream);
 457
 458         snd_bt87x_free_risc(chip);
 459         snd_pcm_lib_free_pages(substream);
 460         return 0;
 461 }
 462
 463 static int snd_bt87x_prepare(snd_pcm_substream_t *substream)
 464 {
 465         bt87x_t *chip = snd_pcm_substream_chip(substream);
 466         snd_pcm_runtime_t *runtime = substream->runtime;
 467         int decimation;
 468
 469         spin_lock_irq(&chip->reg_lock);
 470         chip->reg_control &= ~(CTL_DA_SDR_MASK | CTL_DA_SBR);
 471         decimation = (ANALOG_CLOCK + runtime->rate / 4) / runtime->rate;
 472         chip->reg_control |= decimation << CTL_DA_SDR_SHIFT;
 473         if (runtime->format == SNDRV_PCM_FORMAT_S8)
 474                 chip->reg_control |= CTL_DA_SBR;
 475         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 476         spin_unlock_irq(&chip->reg_lock);
 477         return 0;
 478 }
 479
 480 static int snd_bt87x_start(bt87x_t *chip)
 481 {
 482         spin_lock(&chip->reg_lock);
 483         chip->current_line = 0;
 484         chip->reg_control |= CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN;
 485         snd_bt87x_writel(chip, REG_RISC_STRT_ADD, chip->dma_risc.addr);
 486         snd_bt87x_writel(chip, REG_PACKET_LEN,
 487                          chip->line_bytes | (chip->lines << 16));
 488         snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
 489         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 490         spin_unlock(&chip->reg_lock);
 491         return 0;
 492 }
 493
 494 static int snd_bt87x_stop(bt87x_t *chip)
 495 {
 496         spin_lock(&chip->reg_lock);
 497         chip->reg_control &= ~(CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN);
 498         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 499         snd_bt87x_writel(chip, REG_INT_MASK, 0);
 500         snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
 501         spin_unlock(&chip->reg_lock);
 502         return 0;
 503 }
 504
 505 static int snd_bt87x_trigger(snd_pcm_substream_t *substream, int cmd)
 506 {
 507         bt87x_t *chip = snd_pcm_substream_chip(substream);
 508
 509         switch (cmd) {
 510         case SNDRV_PCM_TRIGGER_START:
 511                 return snd_bt87x_start(chip);
 512         case SNDRV_PCM_TRIGGER_STOP:
 513                 return snd_bt87x_stop(chip);
 514         default:
 515                 return -EINVAL;
 516         }
 517 }
 518
 519 static snd_pcm_uframes_t snd_bt87x_pointer(snd_pcm_substream_t *substream)
 520 {
 521         bt87x_t *chip = snd_pcm_substream_chip(substream);
 522         snd_pcm_runtime_t *runtime = substream->runtime;
 523
 524         return (snd_pcm_uframes_t)bytes_to_frames(runtime, chip->current_line * chip->line_bytes);
 525 }
 526
 527 static snd_pcm_ops_t snd_bt87x_pcm_ops = {
 528         .open = snd_bt87x_pcm_open,
 529         .close = snd_bt87x_close,
 530         .ioctl = snd_pcm_lib_ioctl,
 531         .hw_params = snd_bt87x_hw_params,
 532         .hw_free = snd_bt87x_hw_free,
 533         .prepare = snd_bt87x_prepare,
 534         .trigger = snd_bt87x_trigger,
 535         .pointer = snd_bt87x_pointer,
 536         .page = snd_pcm_sgbuf_ops_page,
 537 };
 538
 539 static int snd_bt87x_capture_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 540 {
 541         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 542         info->count = 1;
 543         info->value.integer.min = 0;
 544         info->value.integer.max = 15;
 545         return 0;
 546 }
 547
 548 static int snd_bt87x_capture_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 549 {
 550         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 551
 552         value->value.integer.value[0] = (chip->reg_control & CTL_A_GAIN_MASK) >> CTL_A_GAIN_SHIFT;
 553         return 0;
 554 }
 555
 556 static int snd_bt87x_capture_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 557 {
 558         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 559         u32 old_control;
 560         int changed;
 561
 562         spin_lock_irq(&chip->reg_lock);
 563         old_control = chip->reg_control;
 564         chip->reg_control = (chip->reg_control & ~CTL_A_GAIN_MASK)
 565                 | (value->value.integer.value[0] << CTL_A_GAIN_SHIFT);
 566         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 567         changed = old_control != chip->reg_control;
 568         spin_unlock_irq(&chip->reg_lock);
 569         return changed;
 570 }
 571
 572 static snd_kcontrol_new_t snd_bt87x_capture_volume = {
 573         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 574         .name = "Capture Volume",
 575         .info = snd_bt87x_capture_volume_info,
 576         .get = snd_bt87x_capture_volume_get,
 577         .put = snd_bt87x_capture_volume_put,
 578 };
 579
 580 static int snd_bt87x_capture_boost_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 581 {
 582         info->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 583         info->count = 1;
 584         info->value.integer.min = 0;
 585         info->value.integer.max = 1;
 586         return 0;
 587 }
 588
 589 static int snd_bt87x_capture_boost_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 590 {
 591         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 592
 593         value->value.integer.value[0] = !! (chip->reg_control & CTL_A_G2X);
 594         return 0;
 595 }
 596
 597 static int snd_bt87x_capture_boost_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 598 {
 599         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 600         u32 old_control;
 601         int changed;
 602
 603         spin_lock_irq(&chip->reg_lock);
 604         old_control = chip->reg_control;
 605         chip->reg_control = (chip->reg_control & ~CTL_A_G2X)
 606                 | (value->value.integer.value[0] ? CTL_A_G2X : 0);
 607         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 608         changed = chip->reg_control != old_control;
 609         spin_unlock_irq(&chip->reg_lock);
 610         return changed;
 611 }
 612
 613 static snd_kcontrol_new_t snd_bt87x_capture_boost = {
 614         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 615         .name = "Capture Boost",
 616         .info = snd_bt87x_capture_boost_info,
 617         .get = snd_bt87x_capture_boost_get,
 618         .put = snd_bt87x_capture_boost_put,
 619 };
 620
 621 static int snd_bt87x_capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
 622 {
 623         static char *texts[3] = {"TV Tuner", "FM", "Mic/Line"};
 624
 625         info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 626         info->count = 1;
 627         info->value.enumerated.items = 3;
 628         if (info->value.enumerated.item > 2)
 629                 info->value.enumerated.item = 2;
 630         strcpy(info->value.enumerated.name, texts[info->value.enumerated.item]);
 631         return 0;
 632 }
 633
 634 static int snd_bt87x_capture_source_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 635 {
 636         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 637
 638         value->value.enumerated.item[0] = (chip->reg_control & CTL_A_SEL_MASK) >> CTL_A_SEL_SHIFT;
 639         return 0;
 640 }
 641
 642 static int snd_bt87x_capture_source_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
 643 {
 644         bt87x_t *chip = snd_kcontrol_chip(kcontrol);
 645         u32 old_control;
 646         int changed;
 647
 648         spin_lock_irq(&chip->reg_lock);
 649         old_control = chip->reg_control;
 650         chip->reg_control = (chip->reg_control & ~CTL_A_SEL_MASK)
 651                 | (value->value.enumerated.item[0] << CTL_A_SEL_SHIFT);
 652         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 653         changed = chip->reg_control != old_control;
 654         spin_unlock_irq(&chip->reg_lock);
 655         return changed;
 656 }
 657
 658 static snd_kcontrol_new_t snd_bt87x_capture_source = {
 659         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 660         .name = "Capture Source",
 661         .info = snd_bt87x_capture_source_info,
 662         .get = snd_bt87x_capture_source_get,
 663         .put = snd_bt87x_capture_source_put,
 664 };
 665
 666 static int snd_bt87x_free(bt87x_t *chip)
 667 {
 668         if (chip->mmio) {
 669                 snd_bt87x_stop(chip);
 670                 if (chip->irq >= 0)
 671                         synchronize_irq(chip->irq);
 672
 673                 iounmap(chip->mmio);
 674         }
 675         if (chip->irq >= 0)
 676                 free_irq(chip->irq, chip);
 677         pci_release_regions(chip->pci);
 678         pci_disable_device(chip->pci);
 679         kfree(chip);
 680         return 0;
 681 }
 682
 683 static int snd_bt87x_dev_free(snd_device_t *device)
 684 {
 685         bt87x_t *chip = device->device_data;
 686         return snd_bt87x_free(chip);
 687 }
 688
 689 static int __devinit snd_bt87x_pcm(bt87x_t *chip, int device, char *name)
 690 {
 691         int err;
 692         snd_pcm_t *pcm;
 693
 694         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 695         if (err < 0)
 696                 return err;
 697         pcm->private_data = chip;
 698         strcpy(pcm->name, name);
 699         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_bt87x_pcm_ops);
 700         return snd_pcm_lib_preallocate_pages_for_all(pcm,
 701                                                      SNDRV_DMA_TYPE_DEV_SG,
 702                                                      snd_dma_pci_data(chip->pci),
 703                                                         128 * 1024,
 704                                                         (255 * 4092 + 1023) & ~1023);
 705 }
 706
 707 static int __devinit snd_bt87x_create(snd_card_t *card,
 708                                       struct pci_dev *pci,
 709                                       bt87x_t **rchip)
 710 {
 711         bt87x_t *chip;
 712         int err;
 713         static snd_device_ops_t ops = {
 714                 .dev_free = snd_bt87x_dev_free
 715         };
 716
 717         *rchip = NULL;
 718
 719         err = pci_enable_device(pci);
 720         if (err < 0)
 721                 return err;
 722
 723         chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
 724         if (!chip) {
 725                 pci_disable_device(pci);
 726                 return -ENOMEM;
 727         }
 728         chip->card = card;
 729         chip->pci = pci;
 730         chip->irq = -1;
 731         spin_lock_init(&chip->reg_lock);
 732
 733         if ((err = pci_request_regions(pci, "Bt87x audio")) < 0) {
 734                 kfree(chip);
 735                 pci_disable_device(pci);
 736                 return err;
 737         }
 738         chip->mmio = ioremap_nocache(pci_resource_start(pci, 0),
 739                                      pci_resource_len(pci, 0));
 740         if (!chip->mmio) {
 741                 snd_bt87x_free(chip);
 742                 snd_printk(KERN_ERR "cannot remap io memory\n");
 743                 return -ENOMEM;
 744         }
 745
 746         chip->reg_control = CTL_DA_ES2 | CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT);
 747         chip->interrupt_mask = MY_INTERRUPTS;
 748         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
 749         snd_bt87x_writel(chip, REG_INT_MASK, 0);
 750         snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
 751
 752         if (request_irq(pci->irq, snd_bt87x_interrupt, SA_INTERRUPT | SA_SHIRQ,
 753                         "Bt87x audio", chip)) {
 754                 snd_bt87x_free(chip);
 755                 snd_printk(KERN_ERR "cannot grab irq\n");
 756                 return -EBUSY;
 757         }
 758         chip->irq = pci->irq;
 759         pci_set_master(pci);
 760         synchronize_irq(chip->irq);
 761
 762         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 763         if (err < 0) {
 764                 snd_bt87x_free(chip);
 765                 return err;
 766         }
 767         snd_card_set_dev(card, &pci->dev);
 768         *rchip = chip;
 769         return 0;
 770 }
 771
 772 #define BT_DEVICE(chip, subvend, subdev, rate) \
 773         { .vendor = PCI_VENDOR_ID_BROOKTREE, \
 774           .device = PCI_DEVICE_ID_BROOKTREE_##chip, \
 775           .subvendor = subvend, .subdevice = subdev, \
 776           .driver_data = rate }
 777
 778 /* driver_data is the default digital_rate value for that device */
 779 static struct pci_device_id snd_bt87x_ids[] = {
 780         BT_DEVICE(878, 0x0070, 0x13eb, 32000), /* Hauppauge WinTV series */
 781         BT_DEVICE(879, 0x0070, 0x13eb, 32000), /* Hauppauge WinTV series */
 782         BT_DEVICE(878, 0x0070, 0xff01, 44100), /* Viewcast Osprey 200 */
 783         { }
 784 };
 785 MODULE_DEVICE_TABLE(pci, snd_bt87x_ids);
 786
 787 /* cards known not to have audio
 788  * (DVB cards use the audio function to transfer MPEG data) */
 789 static struct {
 790         unsigned short subvendor, subdevice;
 791 } blacklist[] __devinitdata = {
 792         {0x0071, 0x0101}, /* Nebula Electronics DigiTV */
 793         {0x11bd, 0x0026}, /* Pinnacle PCTV SAT CI */
 794         {0x1461, 0x0761}, /* AVermedia AverTV DVB-T */
 795         {0x1461, 0x0771}, /* AVermedia DVB-T 771 */
 796         {0x1822, 0x0001}, /* Twinhan VisionPlus DVB-T */
 797         {0x18ac, 0xdb10}, /* DVICO FusionHDTV DVB-T Lite */
 798         {0x270f, 0xfc00}, /* Chaintech Digitop DST-1000 DVB-S */
 799 };
 800
 801 /* return the rate of the card, or a negative value if it's blacklisted */
 802 static int __devinit snd_bt87x_detect_card(struct pci_dev *pci)
 803 {
 804         int i;
 805         const struct pci_device_id *supported;
 806
 807         supported = pci_match_device(snd_bt87x_ids, pci);
 808         if (supported)
 809                 return supported->driver_data;
 810
 811         for (i = 0; i < ARRAY_SIZE(blacklist); ++i)
 812                 if (blacklist[i].subvendor == pci->subsystem_vendor &&
 813                     blacklist[i].subdevice == pci->subsystem_device) {
 814                         snd_printdd(KERN_INFO "card %#04x:%#04x has no audio\n",
 815                                     pci->subsystem_vendor, pci->subsystem_device);
 816                         return -EBUSY;
 817                 }
 818
 819         snd_printk(KERN_INFO "unknown card %#04x:%#04x, using default rate 32000\n",
 820                    pci->subsystem_vendor, pci->subsystem_device);
 821         snd_printk(KERN_DEBUG "please mail id, board name, and, "
 822                    "if it works, the correct digital_rate option to "
 823                    "<alsa-devel@lists.sf.net>\n");
 824         return 32000; /* default rate */
 825 }
 826
 827 static int __devinit snd_bt87x_probe(struct pci_dev *pci,
 828                                      const struct pci_device_id *pci_id)
 829 {
 830         static int dev;
 831         snd_card_t *card;
 832         bt87x_t *chip;
 833         int err, rate;
 834
 835         rate = pci_id->driver_data;
 836         if (! rate)
 837                 if ((rate = snd_bt87x_detect_card(pci)) <= 0)
 838                         return -ENODEV;
 839
 840         if (dev >= SNDRV_CARDS)
 841                 return -ENODEV;
 842         if (!enable[dev]) {
 843                 ++dev;
 844                 return -ENOENT;
 845         }
 846
 847         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 848         if (!card)
 849                 return -ENOMEM;
 850
 851         err = snd_bt87x_create(card, pci, &chip);
 852         if (err < 0)
 853                 goto _error;
 854
 855         if (digital_rate[dev] > 0)
 856                 chip->dig_rate = digital_rate[dev];
 857         else
 858                 chip->dig_rate = rate;
 859
 860         err = snd_bt87x_pcm(chip, DEVICE_DIGITAL, "Bt87x Digital");
 861         if (err < 0)
 862                 goto _error;
 863         err = snd_bt87x_pcm(chip, DEVICE_ANALOG, "Bt87x Analog");
 864         if (err < 0)
 865                 goto _error;
 866
 867         err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_volume, chip));
 868         if (err < 0)
 869                 goto _error;
 870         err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_boost, chip));
 871         if (err < 0)
 872                 goto _error;
 873         err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_source, chip));
 874         if (err < 0)
 875                 goto _error;
 876
 877         strcpy(card->driver, "Bt87x");
 878         sprintf(card->shortname, "Brooktree Bt%x", pci->device);
 879         sprintf(card->longname, "%s at %#lx, irq %i",
 880                 card->shortname, pci_resource_start(pci, 0), chip->irq);
 881         strcpy(card->mixername, "Bt87x");
 882
 883         err = snd_card_register(card);
 884         if (err < 0)
 885                 goto _error;
 886
 887         pci_set_drvdata(pci, card);
 888         ++dev;
 889         return 0;
 890
 891 _error:
 892         snd_card_free(card);
 893         return err;
 894 }
 895
 896 static void __devexit snd_bt87x_remove(struct pci_dev *pci)
 897 {
 898         snd_card_free(pci_get_drvdata(pci));
 899         pci_set_drvdata(pci, NULL);
 900 }
 901
 902 /* default entries for all Bt87x cards - it's not exported */
 903 /* driver_data is set to 0 to call detection */
 904 static struct pci_device_id snd_bt87x_default_ids[] = {
 905         BT_DEVICE(878, PCI_ANY_ID, PCI_ANY_ID, 0),
 906         BT_DEVICE(879, PCI_ANY_ID, PCI_ANY_ID, 0),
 907         { }
 908 };
 909
 910 static struct pci_driver driver = {
 911         .name = "Bt87x",
 912         .id_table = snd_bt87x_ids,
 913         .probe = snd_bt87x_probe,
 914         .remove = __devexit_p(snd_bt87x_remove),
 915 };
 916
 917 static int __init alsa_card_bt87x_init(void)
 918 {
 919         if (load_all)
 920                 driver.id_table = snd_bt87x_default_ids;
 921         return pci_register_driver(&driver);
 922 }
 923
 924 static void __exit alsa_card_bt87x_exit(void)
 925 {
 926         pci_unregister_driver(&driver);
 927 }
 928
 929 module_init(alsa_card_bt87x_init)
 930 module_exit(alsa_card_bt87x_exit)