kernel/2.6.29.6-aldebaran-rt/include/sound/vx_core.h

   1 /*
   2  * Driver for Digigram VX soundcards
   3  *
   4  * Hardware core part
   5  *
   6  * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22
  23 #ifndef __SOUND_VX_COMMON_H
  24 #define __SOUND_VX_COMMON_H
  25
  26 #include <sound/pcm.h>
  27 #include <sound/hwdep.h>
  28 #include <linux/interrupt.h>
  29
  30 #if defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE)
  31 #if !defined(CONFIG_USE_VXLOADER) && !defined(CONFIG_SND_VX_LIB) /* built-in kernel */
  32 #define SND_VX_FW_LOADER        /* use the standard firmware loader */
  33 #endif
  34 #endif
  35
  36 struct firmware;
  37 struct device;
  38
  39 #define VX_DRIVER_VERSION       0x010000        /* 1.0.0 */
  40
  41 /*
  42  */
  43 #define SIZE_MAX_CMD    0x10
  44 #define SIZE_MAX_STATUS 0x10
  45
  46 struct vx_rmh {
  47         u16     LgCmd;          /* length of the command to send (WORDs) */
  48         u16     LgStat;         /* length of the status received (WORDs) */
  49         u32     Cmd[SIZE_MAX_CMD];
  50         u32     Stat[SIZE_MAX_STATUS];
  51         u16     DspStat;        /* status type, RMP_SSIZE_XXX */
  52 };
  53
  54 typedef u64 pcx_time_t;
  55
  56 #define VX_MAX_PIPES    16
  57 #define VX_MAX_PERIODS  32
  58 #define VX_MAX_CODECS   2
  59
  60 struct vx_ibl_info {
  61         int size;       /* the current IBL size (0 = query) in bytes */
  62         int max_size;   /* max. IBL size in bytes */
  63         int min_size;   /* min. IBL size in bytes */
  64         int granularity;        /* granularity */
  65 };
  66
  67 struct vx_pipe {
  68         int number;
  69         unsigned int is_capture: 1;
  70         unsigned int data_mode: 1;
  71         unsigned int running: 1;
  72         unsigned int prepared: 1;
  73         int channels;
  74         unsigned int differed_type;
  75         pcx_time_t pcx_time;
  76         struct snd_pcm_substream *substream;
  77
  78         int hbuf_size;          /* H-buffer size in bytes */
  79         int buffer_bytes;       /* the ALSA pcm buffer size in bytes */
  80         int period_bytes;       /* the ALSA pcm period size in bytes */
  81         int hw_ptr;             /* the current hardware pointer in bytes */
  82         int position;           /* the current position in frames (playback only) */
  83         int transferred;        /* the transferred size (per period) in frames */
  84         int align;              /* size of alignment */
  85         u64 cur_count;          /* current sample position (for playback) */
  86
  87         unsigned int references;     /* an output pipe may be used for monitoring and/or playback */
  88         struct vx_pipe *monitoring_pipe;  /* pointer to the monitoring pipe (capture pipe only)*/
  89
  90         struct tasklet_struct start_tq;
  91 };
  92
  93 struct vx_core;
  94
  95 struct snd_vx_ops {
  96         /* low-level i/o */
  97         unsigned char (*in8)(struct vx_core *chip, int reg);
  98         unsigned int (*in32)(struct vx_core *chip, int reg);
  99         void (*out8)(struct vx_core *chip, int reg, unsigned char val);
 100         void (*out32)(struct vx_core *chip, int reg, unsigned int val);
 101         /* irq */
 102         int (*test_and_ack)(struct vx_core *chip);
 103         void (*validate_irq)(struct vx_core *chip, int enable);
 104         /* codec */
 105         void (*write_codec)(struct vx_core *chip, int codec, unsigned int data);
 106         void (*akm_write)(struct vx_core *chip, int reg, unsigned int data);
 107         void (*reset_codec)(struct vx_core *chip);
 108         void (*change_audio_source)(struct vx_core *chip, int src);
 109         void (*set_clock_source)(struct vx_core *chp, int src);
 110         /* chip init */
 111         int (*load_dsp)(struct vx_core *chip, int idx, const struct firmware *fw);
 112         void (*reset_dsp)(struct vx_core *chip);
 113         void (*reset_board)(struct vx_core *chip, int cold_reset);
 114         int (*add_controls)(struct vx_core *chip);
 115         /* pcm */
 116         void (*dma_write)(struct vx_core *chip, struct snd_pcm_runtime *runtime,
 117                           struct vx_pipe *pipe, int count);
 118         void (*dma_read)(struct vx_core *chip, struct snd_pcm_runtime *runtime,
 119                           struct vx_pipe *pipe, int count);
 120 };
 121
 122 struct snd_vx_hardware {
 123         const char *name;
 124         int type;       /* VX_TYPE_XXX */
 125
 126         /* hardware specs */
 127         unsigned int num_codecs;
 128         unsigned int num_ins;
 129         unsigned int num_outs;
 130         unsigned int output_level_max;
 131         const unsigned int *output_level_db_scale;
 132 };
 133
 134 /* hwdep id string */
 135 #define SND_VX_HWDEP_ID         "VX Loader"
 136
 137 /* hardware type */
 138 enum {
 139         /* VX222 PCI */
 140         VX_TYPE_BOARD,          /* old VX222 PCI */
 141         VX_TYPE_V2,             /* VX222 V2 PCI */
 142         VX_TYPE_MIC,            /* VX222 Mic PCI */
 143         /* VX-pocket */
 144         VX_TYPE_VXPOCKET,       /* VXpocket V2 */
 145         VX_TYPE_VXP440,         /* VXpocket 440 */
 146         VX_TYPE_NUMS
 147 };
 148
 149 /* chip status */
 150 enum {
 151         VX_STAT_XILINX_LOADED   = (1 << 0),     /* devices are registered */
 152         VX_STAT_DEVICE_INIT     = (1 << 1),     /* devices are registered */
 153         VX_STAT_CHIP_INIT       = (1 << 2),     /* all operational */
 154         VX_STAT_IN_SUSPEND      = (1 << 10),    /* in suspend phase */
 155         VX_STAT_IS_STALE        = (1 << 15)     /* device is stale */
 156 };
 157
 158 /* min/max values for analog output for old codecs */
 159 #define VX_ANALOG_OUT_LEVEL_MAX         0xe3
 160
 161 struct vx_core {
 162         /* ALSA stuff */
 163         struct snd_card *card;
 164         struct snd_pcm *pcm[VX_MAX_CODECS];
 165         int type;       /* VX_TYPE_XXX */
 166
 167         int irq;
 168         /* ports are defined externally */
 169
 170         /* low-level functions */
 171         struct snd_vx_hardware *hw;
 172         struct snd_vx_ops *ops;
 173
 174         spinlock_t lock;
 175         spinlock_t irq_lock;
 176         struct tasklet_struct tq;
 177
 178         unsigned int chip_status;
 179         unsigned int pcm_running;
 180
 181         struct device *dev;
 182         struct snd_hwdep *hwdep;
 183
 184         struct vx_rmh irq_rmh;  /* RMH used in interrupts */
 185
 186         unsigned int audio_info; /* see VX_AUDIO_INFO */
 187         unsigned int audio_ins;
 188         unsigned int audio_outs;
 189         struct vx_pipe **playback_pipes;
 190         struct vx_pipe **capture_pipes;
 191
 192         /* clock and audio sources */
 193         unsigned int audio_source;      /* current audio input source */
 194         unsigned int audio_source_target;
 195         unsigned int clock_mode;        /* clock mode (VX_CLOCK_MODE_XXX) */
 196         unsigned int clock_source;      /* current clock source (INTERNAL_QUARTZ or UER_SYNC) */
 197         unsigned int freq;              /* current frequency */
 198         unsigned int freq_detected;     /* detected frequency from digital in */
 199         unsigned int uer_detected;      /* VX_UER_MODE_XXX */
 200         unsigned int uer_bits;  /* IEC958 status bits */
 201         struct vx_ibl_info ibl; /* IBL information */
 202
 203         /* mixer setting */
 204         int output_level[VX_MAX_CODECS][2];     /* analog output level */
 205         int audio_gain[2][4];                   /* digital audio level (playback/capture) */
 206         unsigned char audio_active[4];          /* mute/unmute on digital playback */
 207         int audio_monitor[4];                   /* playback hw-monitor level */
 208         unsigned char audio_monitor_active[4];  /* playback hw-monitor mute/unmute */
 209
 210         struct mutex mixer_mutex;
 211
 212         const struct firmware *firmware[4]; /* loaded firmware data */
 213 };
 214
 215
 216 /*
 217  * constructor
 218  */
 219 struct vx_core *snd_vx_create(struct snd_card *card, struct snd_vx_hardware *hw,
 220                               struct snd_vx_ops *ops, int extra_size);
 221 int snd_vx_setup_firmware(struct vx_core *chip);
 222 int snd_vx_load_boot_image(struct vx_core *chip, const struct firmware *dsp);
 223 int snd_vx_dsp_boot(struct vx_core *chip, const struct firmware *dsp);
 224 int snd_vx_dsp_load(struct vx_core *chip, const struct firmware *dsp);
 225
 226 void snd_vx_free_firmware(struct vx_core *chip);
 227
 228 /*
 229  * interrupt handler; exported for pcmcia
 230  */
 231 irqreturn_t snd_vx_irq_handler(int irq, void *dev);
 232
 233 /*
 234  * lowlevel functions
 235  */
 236 static inline int vx_test_and_ack(struct vx_core *chip)
 237 {
 238         return chip->ops->test_and_ack(chip);
 239 }
 240
 241 static inline void vx_validate_irq(struct vx_core *chip, int enable)
 242 {
 243         chip->ops->validate_irq(chip, enable);
 244 }
 245
 246 static inline unsigned char snd_vx_inb(struct vx_core *chip, int reg)
 247 {
 248         return chip->ops->in8(chip, reg);
 249 }
 250
 251 static inline unsigned int snd_vx_inl(struct vx_core *chip, int reg)
 252 {
 253         return chip->ops->in32(chip, reg);
 254 }
 255
 256 static inline void snd_vx_outb(struct vx_core *chip, int reg, unsigned char val)
 257 {
 258         chip->ops->out8(chip, reg, val);
 259 }
 260
 261 static inline void snd_vx_outl(struct vx_core *chip, int reg, unsigned int val)
 262 {
 263         chip->ops->out32(chip, reg, val);
 264 }
 265
 266 #define vx_inb(chip,reg)        snd_vx_inb(chip, VX_##reg)
 267 #define vx_outb(chip,reg,val)   snd_vx_outb(chip, VX_##reg,val)
 268 #define vx_inl(chip,reg)        snd_vx_inl(chip, VX_##reg)
 269 #define vx_outl(chip,reg,val)   snd_vx_outl(chip, VX_##reg,val)
 270
 271 static inline void vx_reset_dsp(struct vx_core *chip)
 272 {
 273         chip->ops->reset_dsp(chip);
 274 }
 275
 276 int vx_send_msg(struct vx_core *chip, struct vx_rmh *rmh);
 277 int vx_send_msg_nolock(struct vx_core *chip, struct vx_rmh *rmh);
 278 int vx_send_rih(struct vx_core *chip, int cmd);
 279 int vx_send_rih_nolock(struct vx_core *chip, int cmd);
 280
 281 void vx_reset_codec(struct vx_core *chip, int cold_reset);
 282
 283 /*
 284  * check the bit on the specified register
 285  * returns zero if a bit matches, or a negative error code.
 286  * exported for vxpocket driver
 287  */
 288 int snd_vx_check_reg_bit(struct vx_core *chip, int reg, int mask, int bit, int time);
 289 #define vx_check_isr(chip,mask,bit,time) snd_vx_check_reg_bit(chip, VX_ISR, mask, bit, time)
 290 #define vx_wait_isr_bit(chip,bit) vx_check_isr(chip, bit, bit, 200)
 291 #define vx_wait_for_rx_full(chip) vx_wait_isr_bit(chip, ISR_RX_FULL)
 292
 293
 294 /*
 295  * pseudo-DMA transfer
 296  */
 297 static inline void vx_pseudo_dma_write(struct vx_core *chip, struct snd_pcm_runtime *runtime,
 298                                        struct vx_pipe *pipe, int count)
 299 {
 300         chip->ops->dma_write(chip, runtime, pipe, count);
 301 }
 302
 303 static inline void vx_pseudo_dma_read(struct vx_core *chip, struct snd_pcm_runtime *runtime,
 304                                       struct vx_pipe *pipe, int count)
 305 {
 306         chip->ops->dma_read(chip, runtime, pipe, count);
 307 }
 308
 309
 310
 311 /* error with hardware code,
 312  * the return value is -(VX_ERR_MASK | actual-hw-error-code)
 313  */
 314 #define VX_ERR_MASK     0x1000000
 315 #define vx_get_error(err)       (-(err) & ~VX_ERR_MASK)
 316
 317
 318 /*
 319  * pcm stuff
 320  */
 321 int snd_vx_pcm_new(struct vx_core *chip);
 322 void vx_pcm_update_intr(struct vx_core *chip, unsigned int events);
 323
 324 /*
 325  * mixer stuff
 326  */
 327 int snd_vx_mixer_new(struct vx_core *chip);
 328 void vx_toggle_dac_mute(struct vx_core *chip, int mute);
 329 int vx_sync_audio_source(struct vx_core *chip);
 330 int vx_set_monitor_level(struct vx_core *chip, int audio, int level, int active);
 331
 332 /*
 333  * IEC958 & clock stuff
 334  */
 335 void vx_set_iec958_status(struct vx_core *chip, unsigned int bits);
 336 int vx_set_clock(struct vx_core *chip, unsigned int freq);
 337 void vx_set_internal_clock(struct vx_core *chip, unsigned int freq);
 338 int vx_change_frequency(struct vx_core *chip);
 339
 340
 341 /*
 342  * PM
 343  */
 344 int snd_vx_suspend(struct vx_core *card, pm_message_t state);
 345 int snd_vx_resume(struct vx_core *card);
 346
 347 /*
 348  * hardware constants
 349  */
 350
 351 #define vx_has_new_dsp(chip)    ((chip)->type != VX_TYPE_BOARD)
 352 #define vx_is_pcmcia(chip)      ((chip)->type >= VX_TYPE_VXPOCKET)
 353
 354 /* audio input source */
 355 enum {
 356         VX_AUDIO_SRC_DIGITAL,
 357         VX_AUDIO_SRC_LINE,
 358         VX_AUDIO_SRC_MIC
 359 };
 360
 361 /* clock source */
 362 enum {
 363         INTERNAL_QUARTZ,
 364         UER_SYNC
 365 };
 366
 367 /* clock mode */
 368 enum {
 369         VX_CLOCK_MODE_AUTO,     /* depending on the current audio source */
 370         VX_CLOCK_MODE_INTERNAL, /* fixed to internal quartz */
 371         VX_CLOCK_MODE_EXTERNAL  /* fixed to UER sync */
 372 };
 373
 374 /* SPDIF/UER type */
 375 enum {
 376         VX_UER_MODE_CONSUMER,
 377         VX_UER_MODE_PROFESSIONAL,
 378         VX_UER_MODE_NOT_PRESENT,
 379 };
 380
 381 /* register indices */
 382 enum {
 383         VX_ICR,
 384         VX_CVR,
 385         VX_ISR,
 386         VX_IVR,
 387         VX_RXH,
 388         VX_TXH = VX_RXH,
 389         VX_RXM,
 390         VX_TXM = VX_RXM,
 391         VX_RXL,
 392         VX_TXL = VX_RXL,
 393         VX_DMA,
 394         VX_CDSP,
 395         VX_RFREQ,
 396         VX_RUER_V2,
 397         VX_GAIN,
 398         VX_DATA = VX_GAIN,
 399         VX_MEMIRQ,
 400         VX_ACQ,
 401         VX_BIT0,
 402         VX_BIT1,
 403         VX_MIC0,
 404         VX_MIC1,
 405         VX_MIC2,
 406         VX_MIC3,
 407         VX_PLX0,
 408         VX_PLX1,
 409         VX_PLX2,
 410
 411         VX_LOFREQ,  // V2: ACQ, VP: RFREQ
 412         VX_HIFREQ,  // V2: BIT0, VP: RUER_V2
 413         VX_CSUER,   // V2: BIT1, VP: BIT0
 414         VX_RUER,    // V2: RUER_V2, VP: BIT1
 415
 416         VX_REG_MAX,
 417
 418         /* aliases for VX board */
 419         VX_RESET_DMA = VX_ISR,
 420         VX_CFG = VX_RFREQ,
 421         VX_STATUS = VX_MEMIRQ,
 422         VX_SELMIC = VX_MIC0,
 423         VX_COMPOT = VX_MIC1,
 424         VX_SCOMPR = VX_MIC2,
 425         VX_GLIMIT = VX_MIC3,
 426         VX_INTCSR = VX_PLX0,
 427         VX_CNTRL = VX_PLX1,
 428         VX_GPIOC = VX_PLX2,
 429
 430         /* aliases for VXPOCKET board */
 431         VX_MICRO = VX_MEMIRQ,
 432         VX_CODEC2 = VX_MEMIRQ,
 433         VX_DIALOG = VX_ACQ,
 434
 435 };
 436
 437 /* RMH status type */
 438 enum {
 439         RMH_SSIZE_FIXED = 0,    /* status size given by the driver (in LgStat) */
 440         RMH_SSIZE_ARG = 1,      /* status size given in the LSB byte */
 441         RMH_SSIZE_MASK = 2,     /* status size given in bitmask */
 442 };
 443
 444
 445 /* bits for ICR register */
 446 #define ICR_HF1         0x10
 447 #define ICR_HF0         0x08
 448 #define ICR_TREQ        0x02    /* Interrupt mode + HREQ set on for transfer (->DSP) request */
 449 #define ICR_RREQ        0x01    /* Interrupt mode + RREQ set on for transfer (->PC) request */
 450
 451 /* bits for CVR register */
 452 #define CVR_HC          0x80
 453
 454 /* bits for ISR register */
 455 #define ISR_HF3         0x10
 456 #define ISR_HF2         0x08
 457 #define ISR_CHK         0x10
 458 #define ISR_ERR         0x08
 459 #define ISR_TX_READY    0x04
 460 #define ISR_TX_EMPTY    0x02
 461 #define ISR_RX_FULL     0x01
 462
 463 /* Constants used to access the DATA register */
 464 #define VX_DATA_CODEC_MASK      0x80
 465 #define VX_DATA_XICOR_MASK      0x80
 466
 467 /* Constants used to access the CSUER register (both for VX2 and VXP) */
 468 #define VX_SUER_FREQ_MASK               0x0c
 469 #define VX_SUER_FREQ_32KHz_MASK         0x0c
 470 #define VX_SUER_FREQ_44KHz_MASK         0x00
 471 #define VX_SUER_FREQ_48KHz_MASK         0x04
 472 #define VX_SUER_DATA_PRESENT_MASK       0x02
 473 #define VX_SUER_CLOCK_PRESENT_MASK      0x01
 474
 475 #define VX_CUER_HH_BITC_SEL_MASK        0x08
 476 #define VX_CUER_MH_BITC_SEL_MASK        0x04
 477 #define VX_CUER_ML_BITC_SEL_MASK        0x02
 478 #define VX_CUER_LL_BITC_SEL_MASK        0x01
 479
 480 #define XX_UER_CBITS_OFFSET_MASK        0x1f
 481
 482
 483 /* bits for audio_info */
 484 #define VX_AUDIO_INFO_REAL_TIME (1<<0)  /* real-time processing available */
 485 #define VX_AUDIO_INFO_OFFLINE   (1<<1)  /* offline processing available */
 486 #define VX_AUDIO_INFO_MPEG1     (1<<5)
 487 #define VX_AUDIO_INFO_MPEG2     (1<<6)
 488 #define VX_AUDIO_INFO_LINEAR_8  (1<<7)
 489 #define VX_AUDIO_INFO_LINEAR_16 (1<<8)
 490 #define VX_AUDIO_INFO_LINEAR_24 (1<<9)
 491
 492 /* DSP Interrupt Request values */
 493 #define VXP_IRQ_OFFSET          0x40 /* add 0x40 offset for vxpocket and vx222/v2 */
 494 /* call with vx_send_irq_dsp() */
 495 #define IRQ_MESS_WRITE_END          0x30
 496 #define IRQ_MESS_WRITE_NEXT         0x32
 497 #define IRQ_MESS_READ_NEXT          0x34
 498 #define IRQ_MESS_READ_END           0x36
 499 #define IRQ_MESSAGE                 0x38
 500 #define IRQ_RESET_CHK               0x3A
 501 #define IRQ_CONNECT_STREAM_NEXT     0x26
 502 #define IRQ_CONNECT_STREAM_END      0x28
 503 #define IRQ_PAUSE_START_CONNECT     0x2A
 504 #define IRQ_END_CONNECTION          0x2C
 505
 506 /* Is there async. events pending ( IT Source Test ) */
 507 #define ASYNC_EVENTS_PENDING            0x008000
 508 #define HBUFFER_EVENTS_PENDING          0x004000   // Not always accurate
 509 #define NOTIF_EVENTS_PENDING            0x002000
 510 #define TIME_CODE_EVENT_PENDING         0x001000
 511 #define FREQUENCY_CHANGE_EVENT_PENDING  0x000800
 512 #define END_OF_BUFFER_EVENTS_PENDING    0x000400
 513 #define FATAL_DSP_ERROR                 0xff0000
 514
 515 /* Stream Format Header Defines */
 516 #define HEADER_FMT_BASE                 0xFED00000
 517 #define HEADER_FMT_MONO                 0x000000C0
 518 #define HEADER_FMT_INTEL                0x00008000
 519 #define HEADER_FMT_16BITS               0x00002000
 520 #define HEADER_FMT_24BITS               0x00004000
 521 #define HEADER_FMT_UPTO11               0x00000200      /* frequency is less or equ. to 11k.*/
 522 #define HEADER_FMT_UPTO32               0x00000100      /* frequency is over 11k and less then 32k.*/
 523
 524 /* Constants used to access the Codec */
 525 #define XX_CODEC_SELECTOR               0x20
 526 /* codec commands */
 527 #define XX_CODEC_ADC_CONTROL_REGISTER   0x01
 528 #define XX_CODEC_DAC_CONTROL_REGISTER   0x02
 529 #define XX_CODEC_LEVEL_LEFT_REGISTER    0x03
 530 #define XX_CODEC_LEVEL_RIGHT_REGISTER   0x04
 531 #define XX_CODEC_PORT_MODE_REGISTER     0x05
 532 #define XX_CODEC_STATUS_REPORT_REGISTER 0x06
 533 #define XX_CODEC_CLOCK_CONTROL_REGISTER 0x07
 534
 535 /*
 536  * Audio-level control values
 537  */
 538 #define CVAL_M110DB             0x000   /* -110dB */
 539 #define CVAL_M99DB              0x02C
 540 #define CVAL_M21DB              0x163
 541 #define CVAL_M18DB              0x16F
 542 #define CVAL_M10DB              0x18F
 543 #define CVAL_0DB                0x1B7
 544 #define CVAL_18DB               0x1FF   /* +18dB */
 545 #define CVAL_MAX                0x1FF
 546
 547 #define AUDIO_IO_HAS_MUTE_LEVEL                 0x400000
 548 #define AUDIO_IO_HAS_MUTE_MONITORING_1          0x200000
 549 #define AUDIO_IO_HAS_MUTE_MONITORING_2          0x100000
 550 #define VALID_AUDIO_IO_DIGITAL_LEVEL            0x01
 551 #define VALID_AUDIO_IO_MONITORING_LEVEL         0x02
 552 #define VALID_AUDIO_IO_MUTE_LEVEL               0x04
 553 #define VALID_AUDIO_IO_MUTE_MONITORING_1        0x08
 554 #define VALID_AUDIO_IO_MUTE_MONITORING_2        0x10
 555
 556
 557 #endif /* __SOUND_VX_COMMON_H */