// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Asihpi soundcard
 *  Copyright (c) by AudioScience Inc <support@audioscience.com>
 *
 *  The following is not a condition of use, merely a request:
 *  If you modify this program, particularly if you fix errors, AudioScience Inc
 *  would appreciate it if you grant us the right to use those modifications
 *  for any purpose including commercial applications.
 */

#include "hpi_internal.h"
#include "hpi_version.h"
#include "hpimsginit.h"
#include "hpioctl.h"
#include "hpicmn.h"

#include <linux/pci.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/hwdep.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("AudioScience inc. <support@audioscience.com>");
MODULE_DESCRIPTION("AudioScience ALSA ASI5xxx ASI6xxx ASI87xx ASI89xx "
                        HPI_VER_STRING);

#if defined CONFIG_SND_DEBUG_VERBOSE
/**
 * snd_printddd - very verbose debug printk
 * @format: format string
 *
 * Works like snd_printk() for debugging purposes.
 * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set.
 * Must set snd module debug parameter to 3 to enable at runtime.
 */
#define snd_printddd(format, args...) \
        __snd_printk(3, __FILE__, __LINE__, format, ##args)
#else
#define snd_printddd(format, args...) do { } while (0)
#endif

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
static bool enable_hpi_hwdep = 1;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "ALSA index value for AudioScience soundcard.");

module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ALSA ID string for AudioScience soundcard.");

module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "ALSA enable AudioScience soundcard.");

module_param(enable_hpi_hwdep, bool, 0644);
MODULE_PARM_DESC(enable_hpi_hwdep,
                "ALSA enable HPI hwdep for AudioScience soundcard ");

/* identify driver */
#ifdef KERNEL_ALSA_BUILD
static char *build_info = "Built using headers from kernel source";
module_param(build_info, charp, 0444);
MODULE_PARM_DESC(build_info, "Built using headers from kernel source");
#else
static char *build_info = "Built within ALSA source";
module_param(build_info, charp, 0444);
MODULE_PARM_DESC(build_info, "Built within ALSA source");
#endif

/* set to 1 to dump every control from adapter to log */
static const int mixer_dump;

#define DEFAULT_SAMPLERATE 44100
static int adapter_fs = DEFAULT_SAMPLERATE;

/* defaults */
#define PERIODS_MIN 2
#define PERIOD_BYTES_MIN  2048
#define BUFFER_BYTES_MAX (512 * 1024)

#define MAX_CLOCKSOURCES (HPI_SAMPLECLOCK_SOURCE_LAST + 1 + 7)

struct clk_source {
        int source;
        int index;
        const char *name;
};

struct clk_cache {
        int count;
        int has_local;
        struct clk_source s[MAX_CLOCKSOURCES];
};

/* Per card data */
struct snd_card_asihpi {
        struct snd_card *card;
        struct pci_dev *pci;
        struct hpi_adapter *hpi;

        /* In low latency mode there is only one stream, a pointer to its
         * private data is stored here on trigger and cleared on stop.
         * The interrupt handler uses it as a parameter when calling
         * snd_card_asihpi_timer_function().
         */
        struct snd_card_asihpi_pcm *llmode_streampriv;
        struct tasklet_struct t;
        void (*pcm_start)(struct snd_pcm_substream *substream);
        void (*pcm_stop)(struct snd_pcm_substream *substream);

        u32 h_mixer;
        struct clk_cache cc;

        u16 can_dma;
        u16 support_grouping;
        u16 support_mrx;
        u16 update_interval_frames;
        u16 in_max_chans;
        u16 out_max_chans;
        u16 in_min_chans;
        u16 out_min_chans;
};

/* Per stream data */
struct snd_card_asihpi_pcm {
        struct timer_list timer;
        unsigned int respawn_timer;
        unsigned int hpi_buffer_attached;
        unsigned int buffer_bytes;
        unsigned int period_bytes;
        unsigned int bytes_per_sec;
        unsigned int pcm_buf_host_rw_ofs; /* Host R/W pos */
        unsigned int pcm_buf_dma_ofs;   /* DMA R/W offset in buffer */
        unsigned int pcm_buf_elapsed_dma_ofs;   /* DMA R/W offset in buffer */
        unsigned int drained_count;
        struct snd_pcm_substream *substream;
        u32 h_stream;
        struct hpi_format format;
};

/* universal stream verbs work with out or in stream handles */

/* Functions to allow driver to give a buffer to HPI for busmastering */

static u16 hpi_stream_host_buffer_attach(
        u32 h_stream,   /* handle to outstream. */
        u32 size_in_bytes, /* size in bytes of bus mastering buffer */
        u32 pci_address
)
{
        struct hpi_message hm;
        struct hpi_response hr;
        unsigned int obj = hpi_handle_object(h_stream);

        if (!h_stream)
                return HPI_ERROR_INVALID_OBJ;
        hpi_init_message_response(&hm, &hr, obj,
                        obj == HPI_OBJ_OSTREAM ?
                                HPI_OSTREAM_HOSTBUFFER_ALLOC :
                                HPI_ISTREAM_HOSTBUFFER_ALLOC);

        hpi_handle_to_indexes(h_stream, &hm.adapter_index,
                                &hm.obj_index);

        hm.u.d.u.buffer.buffer_size = size_in_bytes;
        hm.u.d.u.buffer.pci_address = pci_address;
        hm.u.d.u.buffer.command = HPI_BUFFER_CMD_INTERNAL_GRANTADAPTER;
        hpi_send_recv(&hm, &hr);
        return hr.error;
}

static u16 hpi_stream_host_buffer_detach(u32  h_stream)
{
        struct hpi_message hm;
        struct hpi_response hr;
        unsigned int obj = hpi_handle_object(h_stream);

        if (!h_stream)
                return HPI_ERROR_INVALID_OBJ;

        hpi_init_message_response(&hm, &hr,  obj,
                        obj == HPI_OBJ_OSTREAM ?
                                HPI_OSTREAM_HOSTBUFFER_FREE :
                                HPI_ISTREAM_HOSTBUFFER_FREE);

        hpi_handle_to_indexes(h_stream, &hm.adapter_index,
                                &hm.obj_index);
        hm.u.d.u.buffer.command = HPI_BUFFER_CMD_INTERNAL_REVOKEADAPTER;
        hpi_send_recv(&hm, &hr);
        return hr.error;
}

static inline u16 hpi_stream_start(u32 h_stream)
{
        if (hpi_handle_object(h_stream) ==  HPI_OBJ_OSTREAM)
                return hpi_outstream_start(h_stream);
        else
                return hpi_instream_start(h_stream);
}

static inline u16 hpi_stream_stop(u32 h_stream)
{
        if (hpi_handle_object(h_stream) ==  HPI_OBJ_OSTREAM)
                return hpi_outstream_stop(h_stream);
        else
                return hpi_instream_stop(h_stream);
}

static inline u16 hpi_stream_get_info_ex(
    u32 h_stream,
    u16        *pw_state,
    u32        *pbuffer_size,
    u32        *pdata_in_buffer,
    u32        *psample_count,
    u32        *pauxiliary_data
)
{
        u16 e;
        if (hpi_handle_object(h_stream)  ==  HPI_OBJ_OSTREAM)
                e = hpi_outstream_get_info_ex(h_stream, pw_state,
                                        pbuffer_size, pdata_in_buffer,
                                        psample_count, pauxiliary_data);
        else
                e = hpi_instream_get_info_ex(h_stream, pw_state,
                                        pbuffer_size, pdata_in_buffer,
                                        psample_count, pauxiliary_data);
        return e;
}

static inline u16 hpi_stream_group_add(
                                        u32 h_master,
                                        u32 h_stream)
{
        if (hpi_handle_object(h_master) ==  HPI_OBJ_OSTREAM)
                return hpi_outstream_group_add(h_master, h_stream);
        else
                return hpi_instream_group_add(h_master, h_stream);
}

static inline u16 hpi_stream_group_reset(u32 h_stream)
{
        if (hpi_handle_object(h_stream) ==  HPI_OBJ_OSTREAM)
                return hpi_outstream_group_reset(h_stream);
        else
                return hpi_instream_group_reset(h_stream);
}

static inline u16 hpi_stream_group_get_map(
                                u32 h_stream, u32 *mo, u32 *mi)
{
        if (hpi_handle_object(h_stream) ==  HPI_OBJ_OSTREAM)
                return hpi_outstream_group_get_map(h_stream, mo, mi);
        else
                return hpi_instream_group_get_map(h_stream, mo, mi);
}

static u16 handle_error(u16 err, int line, char *filename)
{
        if (err)
                printk(KERN_WARNING
                        "in file %s, line %d: HPI error %d\n",
                        filename, line, err);
        return err;
}

#define hpi_handle_error(x)  handle_error(x, __LINE__, __FILE__)

/***************************** GENERAL PCM ****************/

static void print_hwparams(struct snd_pcm_substream *substream,
                                struct snd_pcm_hw_params *p)
{
        char name[16];
        snd_pcm_debug_name(substream, name, sizeof(name));
        snd_printdd("%s HWPARAMS\n", name);
        snd_printdd(" samplerate=%dHz channels=%d format=%d subformat=%d\n",
                params_rate(p), params_channels(p),
                params_format(p), params_subformat(p));
        snd_printdd(" buffer=%dB period=%dB period_size=%dB periods=%d\n",
                params_buffer_bytes(p), params_period_bytes(p),
                params_period_size(p), params_periods(p));
        snd_printdd(" buffer_size=%d access=%d data_rate=%dB/s\n",
                params_buffer_size(p), params_access(p),
                params_rate(p) * params_channels(p) *
                snd_pcm_format_width(params_format(p)) / 8);
}

#define INVALID_FORMAT  (__force snd_pcm_format_t)(-1)

static const snd_pcm_format_t hpi_to_alsa_formats[] = {
        INVALID_FORMAT,         /* INVALID */
        SNDRV_PCM_FORMAT_U8,    /* HPI_FORMAT_PCM8_UNSIGNED        1 */
        SNDRV_PCM_FORMAT_S16,   /* HPI_FORMAT_PCM16_SIGNED         2 */
        INVALID_FORMAT,         /* HPI_FORMAT_MPEG_L1              3 */
        SNDRV_PCM_FORMAT_MPEG,  /* HPI_FORMAT_MPEG_L2              4 */
        SNDRV_PCM_FORMAT_MPEG,  /* HPI_FORMAT_MPEG_L3              5 */
        INVALID_FORMAT,         /* HPI_FORMAT_DOLBY_AC2            6 */
        INVALID_FORMAT,         /* HPI_FORMAT_DOLBY_AC3            7 */
        SNDRV_PCM_FORMAT_S16_BE,/* HPI_FORMAT_PCM16_BIGENDIAN      8 */
        INVALID_FORMAT,         /* HPI_FORMAT_AA_TAGIT1_HITS       9 */
        INVALID_FORMAT,         /* HPI_FORMAT_AA_TAGIT1_INSERTS   10 */
        SNDRV_PCM_FORMAT_S32,   /* HPI_FORMAT_PCM32_SIGNED        11 */
        INVALID_FORMAT,         /* HPI_FORMAT_RAW_BITSTREAM       12 */
        INVALID_FORMAT,         /* HPI_FORMAT_AA_TAGIT1_HITS_EX1  13 */
        SNDRV_PCM_FORMAT_FLOAT, /* HPI_FORMAT_PCM32_FLOAT         14 */
#if 1
        /* ALSA can't handle 3 byte sample size together with power-of-2
         *  constraint on buffer_bytes, so disable this format
         */
        INVALID_FORMAT
#else
        /* SNDRV_PCM_FORMAT_S24_3LE */ /* HPI_FORMAT_PCM24_SIGNED 15 */
#endif
};


static int snd_card_asihpi_format_alsa2hpi(snd_pcm_format_t alsa_format,
                                           u16 *hpi_format)
{
        u16 format;

        for (format = HPI_FORMAT_PCM8_UNSIGNED;
             format <= HPI_FORMAT_PCM24_SIGNED; format++) {
                if (hpi_to_alsa_formats[format] == alsa_format) {
                        *hpi_format = format;
                        return 0;
                }
        }

        snd_printd(KERN_WARNING "failed match for alsa format %d\n",
                   alsa_format);
        *hpi_format = 0;
        return -EINVAL;
}

static void snd_card_asihpi_pcm_samplerates(struct snd_card_asihpi *asihpi,
                                         struct snd_pcm_hardware *pcmhw)
{
        u16 err;
        u32 h_control;
        u32 sample_rate;
        int idx;
        unsigned int rate_min = 200000;
        unsigned int rate_max = 0;
        unsigned int rates = 0;

        if (asihpi->support_mrx) {
                rates |= SNDRV_PCM_RATE_CONTINUOUS;
                rates |= SNDRV_PCM_RATE_8000_96000;
                rate_min = 8000;
                rate_max = 100000;
        } else {
                /* on cards without SRC,
                   valid rates are determined by sampleclock */
                err = hpi_mixer_get_control(asihpi->h_mixer,
                                          HPI_SOURCENODE_CLOCK_SOURCE, 0, 0, 0,
                                          HPI_CONTROL_SAMPLECLOCK, &h_control);
                if (err) {
                        dev_err(&asihpi->pci->dev,
                                "No local sampleclock, err %d\n", err);
                }

                for (idx = -1; idx < 100; idx++) {
                        if (idx == -1) {
                                if (hpi_sample_clock_get_sample_rate(h_control,
                                                                &sample_rate))
                                        continue;
                        } else if (hpi_sample_clock_query_local_rate(h_control,
                                                        idx, &sample_rate)) {
                                break;
                        }

                        rate_min = min(rate_min, sample_rate);
                        rate_max = max(rate_max, sample_rate);

                        switch (sample_rate) {
                        case 5512:
                                rates |= SNDRV_PCM_RATE_5512;
                                break;
                        case 8000:
                                rates |= SNDRV_PCM_RATE_8000;
                                break;
                        case 11025:
                                rates |= SNDRV_PCM_RATE_11025;
                                break;
                        case 16000:
                                rates |= SNDRV_PCM_RATE_16000;
                                break;
                        case 22050:
                                rates |= SNDRV_PCM_RATE_22050;
                                break;
                        case 32000:
                                rates |= SNDRV_PCM_RATE_32000;
                                break;
                        case 44100:
                                rates |= SNDRV_PCM_RATE_44100;
                                break;
                        case 48000:
                                rates |= SNDRV_PCM_RATE_48000;
                                break;
                        case 64000:
                                rates |= SNDRV_PCM_RATE_64000;
                                break;
                        case 88200:
                                rates |= SNDRV_PCM_RATE_88200;
                                break;
                        case 96000:
                                rates |= SNDRV_PCM_RATE_96000;
                                break;
                        case 176400:
                                rates |= SNDRV_PCM_RATE_176400;
                                break;
                        case 192000:
                                rates |= SNDRV_PCM_RATE_192000;
                                break;
                        default: /* some other rate */
                                rates |= SNDRV_PCM_RATE_KNOT;
                        }
                }
        }

        pcmhw->rates = rates;
        pcmhw->rate_min = rate_min;
        pcmhw->rate_max = rate_max;
}

static int snd_card_asihpi_pcm_hw_params(struct snd_pcm_substream *substream,
                                         struct snd_pcm_hw_params *params)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;
        struct snd_card_asihpi *card = snd_pcm_substream_chip(substream);
        int err;
        u16 format;
        int width;
        unsigned int bytes_per_sec;

        print_hwparams(substream, params);
        err = snd_card_asihpi_format_alsa2hpi(params_format(params), &format);
        if (err)
                return err;

        hpi_handle_error(hpi_format_create(&dpcm->format,
                        params_channels(params),
                        format, params_rate(params), 0, 0));

        if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
                if (hpi_instream_reset(dpcm->h_stream) != 0)
                        return -EINVAL;

                if (hpi_instream_set_format(
                        dpcm->h_stream, &dpcm->format) != 0)
                        return -EINVAL;
        }

        dpcm->hpi_buffer_attached = 0;
        if (card->can_dma) {
                err = hpi_stream_host_buffer_attach(dpcm->h_stream,
                        params_buffer_bytes(params),  runtime->dma_addr);
                if (err == 0) {
                        snd_printdd(
                                "stream_host_buffer_attach success %u %lu\n",
                                params_buffer_bytes(params),
                                (unsigned long)runtime->dma_addr);
                } else {
                        snd_printd("stream_host_buffer_attach error %d\n",
                                        err);
                        return -ENOMEM;
                }

                err = hpi_stream_get_info_ex(dpcm->h_stream, NULL,
                                &dpcm->hpi_buffer_attached, NULL, NULL, NULL);
        }
        bytes_per_sec = params_rate(params) * params_channels(params);
        width = snd_pcm_format_width(params_format(params));
        bytes_per_sec *= width;
        bytes_per_sec /= 8;
        if (width < 0 || bytes_per_sec == 0)
                return -EINVAL;

        dpcm->bytes_per_sec = bytes_per_sec;
        dpcm->buffer_bytes = params_buffer_bytes(params);
        dpcm->period_bytes = params_period_bytes(params);

        return 0;
}

static int
snd_card_asihpi_hw_free(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;
        if (dpcm->hpi_buffer_attached)
                hpi_stream_host_buffer_detach(dpcm->h_stream);

        return 0;
}

static void snd_card_asihpi_runtime_free(struct snd_pcm_runtime *runtime)
{
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;
        kfree(dpcm);
}

static void snd_card_asihpi_pcm_timer_start(struct snd_pcm_substream *
                                            substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;
        int expiry;

        expiry = HZ / 200;

        expiry = max(expiry, 1); /* don't let it be zero! */
        mod_timer(&dpcm->timer, jiffies + expiry);
        dpcm->respawn_timer = 1;
}

static void snd_card_asihpi_pcm_timer_stop(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;

        dpcm->respawn_timer = 0;
        del_timer(&dpcm->timer);
}

static void snd_card_asihpi_pcm_int_start(struct snd_pcm_substream *substream)
{
        struct snd_card_asihpi_pcm *dpcm;
        struct snd_card_asihpi *card;

        dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data;
        card = snd_pcm_substream_chip(substream);

        WARN_ON(in_interrupt());
        tasklet_disable(&card->t);
        card->llmode_streampriv = dpcm;
        tasklet_enable(&card->t);

        hpi_handle_error(hpi_adapter_set_property(card->hpi->adapter->index,
                HPI_ADAPTER_PROPERTY_IRQ_RATE,
                card->update_interval_frames, 0));
}

static void snd_card_asihpi_pcm_int_stop(struct snd_pcm_substream *substream)
{
        struct snd_card_asihpi *card;

        card = snd_pcm_substream_chip(substream);

        hpi_handle_error(hpi_adapter_set_property(card->hpi->adapter->index,
                HPI_ADAPTER_PROPERTY_IRQ_RATE, 0, 0));

        if (in_interrupt())
                card->llmode_streampriv = NULL;
        else {
                tasklet_disable(&card->t);
                card->llmode_streampriv = NULL;
                tasklet_enable(&card->t);
        }
}

static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream,
                                           int cmd)
{
        struct snd_card_asihpi_pcm *dpcm = substream->runtime->private_data;
        struct snd_card_asihpi *card = snd_pcm_substream_chip(substream);
        struct snd_pcm_substream *s;
        u16 e;
        char name[16];

        snd_pcm_debug_name(substream, name, sizeof(name));

        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
                snd_printdd("%s trigger start\n", name);
                snd_pcm_group_for_each_entry(s, substream) {
                        struct snd_pcm_runtime *runtime = s->runtime;
                        struct snd_card_asihpi_pcm *ds = runtime->private_data;

                        if (snd_pcm_substream_chip(s) != card)
                                continue;

                        /* don't link Cap and Play */
                        if (substream->stream != s->stream)
                                continue;

                        ds->drained_count = 0;
                        if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                                /* How do I know how much valid data is present
                                * in buffer? Must be at least one period!
                                * Guessing 2 periods, but if
                                * buffer is bigger it may contain even more
                                * data??
                                */
                                unsigned int preload = ds->period_bytes * 1;
                                snd_printddd("%d preload %d\n", s->number, preload);
                                hpi_handle_error(hpi_outstream_write_buf(
                                                ds->h_stream,
                                                &runtime->dma_area[0],
                                                preload,
                                                &ds->format));
                                ds->pcm_buf_host_rw_ofs = preload;
                        }

                        if (card->support_grouping) {
                                snd_printdd("%d group\n", s->number);
                                e = hpi_stream_group_add(
                                        dpcm->h_stream,
                                        ds->h_stream);
                                if (!e) {
                                        snd_pcm_trigger_done(s, substream);
                                } else {
                                        hpi_handle_error(e);
                                        break;
                                }
                        } else
                                break;
                }
                /* start the master stream */
                card->pcm_start(substream);
                if ((substream->stream == SNDRV_PCM_STREAM_CAPTURE) ||
                        !card->can_dma)
                        hpi_handle_error(hpi_stream_start(dpcm->h_stream));
                break;

        case SNDRV_PCM_TRIGGER_STOP:
                snd_printdd("%s trigger stop\n", name);
                card->pcm_stop(substream);
                snd_pcm_group_for_each_entry(s, substream) {
                        if (snd_pcm_substream_chip(s) != card)
                                continue;
                        /* don't link Cap and Play */
                        if (substream->stream != s->stream)
                                continue;

                        /*? workaround linked streams don't
                        transition to SETUP 20070706*/
                        s->runtime->status->state = SNDRV_PCM_STATE_SETUP;

                        if (card->support_grouping) {
                                snd_printdd("%d group\n", s->number);
                                snd_pcm_trigger_done(s, substream);
                        } else
                                break;
                }

                /* _prepare and _hwparams reset the stream */
                hpi_handle_error(hpi_stream_stop(dpcm->h_stream));
                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                        hpi_handle_error(
                                hpi_outstream_reset(dpcm->h_stream));

                if (card->support_grouping)
                        hpi_handle_error(hpi_stream_group_reset(dpcm->h_stream));
                break;

        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
                snd_printdd("%s trigger pause release\n", name);
                card->pcm_start(substream);
                hpi_handle_error(hpi_stream_start(dpcm->h_stream));
                break;
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
                snd_printdd("%s trigger pause push\n", name);
                card->pcm_stop(substream);
                hpi_handle_error(hpi_stream_stop(dpcm->h_stream));
                break;
        default:
                snd_printd(KERN_ERR "\tINVALID\n");
                return -EINVAL;
        }

        return 0;
}

/*algorithm outline
 Without linking degenerates to getting single stream pos etc
 Without mmap 2nd loop degenerates to snd_pcm_period_elapsed
*/
/*
pcm_buf_dma_ofs=get_buf_pos(s);
for_each_linked_stream(s) {
        pcm_buf_dma_ofs=get_buf_pos(s);
        min_buf_pos = modulo_min(min_buf_pos, pcm_buf_dma_ofs, buffer_bytes)
        new_data = min(new_data, calc_new_data(pcm_buf_dma_ofs,irq_pos)
}
timer.expires = jiffies + predict_next_period_ready(min_buf_pos);
for_each_linked_stream(s) {
        s->pcm_buf_dma_ofs = min_buf_pos;
        if (new_data > period_bytes) {
                if (mmap) {
                        irq_pos = (irq_pos + period_bytes) % buffer_bytes;
                        if (playback) {
                                write(period_bytes);
                        } else {
                                read(period_bytes);
                        }
                }
                snd_pcm_period_elapsed(s);
        }
}
*/

/** Minimum of 2 modulo values.  Works correctly when the difference between
* the values is less than half the modulus
*/
static inline unsigned int modulo_min(unsigned int a, unsigned int b,
                                        unsigned long int modulus)
{
        unsigned int result;
        if (((a-b) % modulus) < (modulus/2))
                result = b;
        else
                result = a;

        return result;
}

/** Timer function, equivalent to interrupt service routine for cards
*/
static void snd_card_asihpi_timer_function(struct timer_list *t)
{
        struct snd_card_asihpi_pcm *dpcm = from_timer(dpcm, t, timer);
        struct snd_pcm_substream *substream = dpcm->substream;
        struct snd_card_asihpi *card = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime;
        struct snd_pcm_substream *s;
        unsigned int newdata = 0;
        unsigned int pcm_buf_dma_ofs, min_buf_pos = 0;
        unsigned int remdata, xfercount, next_jiffies;
        int first = 1;
        int loops = 0;
        u16 state;
        u32 buffer_size, bytes_avail, samples_played, on_card_bytes;
        char name[16];


        snd_pcm_debug_name(substream, name, sizeof(name));

        /* find minimum newdata and buffer pos in group */
        snd_pcm_group_for_each_entry(s, substream) {
                struct snd_card_asihpi_pcm *ds = s->runtime->private_data;
                runtime = s->runtime;

                if (snd_pcm_substream_chip(s) != card)
                        continue;

                /* don't link Cap and Play */
                if (substream->stream != s->stream)
                        continue;

                hpi_handle_error(hpi_stream_get_info_ex(
                                        ds->h_stream, &state,
                                        &buffer_size, &bytes_avail,
                                        &samples_played, &on_card_bytes));

                /* number of bytes in on-card buffer */
                runtime->delay = on_card_bytes;

                if (!card->can_dma)
                        on_card_bytes = bytes_avail;

                if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                        pcm_buf_dma_ofs = ds->pcm_buf_host_rw_ofs - bytes_avail;
                        if (state == HPI_STATE_STOPPED) {
                                if (bytes_avail == 0) {
                                        hpi_handle_error(hpi_stream_start(ds->h_stream));
                                        snd_printdd("P%d start\n", s->number);
                                        ds->drained_count = 0;
                                }
                        } else if (state == HPI_STATE_DRAINED) {
                                snd_printd(KERN_WARNING "P%d drained\n",
                                                s->number);
                                ds->drained_count++;
                                if (ds->drained_count > 20) {
                                        snd_pcm_stop_xrun(s);
                                        continue;
                                }
                        } else {
                                ds->drained_count = 0;
                        }
                } else
                        pcm_buf_dma_ofs = bytes_avail + ds->pcm_buf_host_rw_ofs;

                if (first) {
                        /* can't statically init min when wrap is involved */
                        min_buf_pos = pcm_buf_dma_ofs;
                        newdata = (pcm_buf_dma_ofs - ds->pcm_buf_elapsed_dma_ofs) % ds->buffer_bytes;
                        first = 0;
                } else {
                        min_buf_pos =
                                modulo_min(min_buf_pos, pcm_buf_dma_ofs, UINT_MAX+1L);
                        newdata = min(
                                (pcm_buf_dma_ofs - ds->pcm_buf_elapsed_dma_ofs) % ds->buffer_bytes,
                                newdata);
                }

                snd_printddd(
                        "timer1, %s, %d, S=%d, elap=%d, rw=%d, dsp=%d, left=%d, aux=%d, space=%d, hw_ptr=%ld, appl_ptr=%ld\n",
                        name, s->number, state,
                        ds->pcm_buf_elapsed_dma_ofs,
                        ds->pcm_buf_host_rw_ofs,
                        pcm_buf_dma_ofs,
                        (int)bytes_avail,

                        (int)on_card_bytes,
                        buffer_size-bytes_avail,
                        (unsigned long)frames_to_bytes(runtime,
                                                runtime->status->hw_ptr),
                        (unsigned long)frames_to_bytes(runtime,
                                                runtime->control->appl_ptr)
                );
                loops++;
        }
        pcm_buf_dma_ofs = min_buf_pos;

        remdata = newdata % dpcm->period_bytes;
        xfercount = newdata - remdata; /* a multiple of period_bytes */
        /* come back when on_card_bytes has decreased enough to allow
           write to happen, or when data has been consumed to make another
           period
        */
        if (xfercount && (on_card_bytes  > dpcm->period_bytes))
                next_jiffies = ((on_card_bytes - dpcm->period_bytes) * HZ / dpcm->bytes_per_sec);
        else
                next_jiffies = ((dpcm->period_bytes - remdata) * HZ / dpcm->bytes_per_sec);

        next_jiffies = max(next_jiffies, 1U);
        dpcm->timer.expires = jiffies + next_jiffies;
        snd_printddd("timer2, jif=%d, buf_pos=%d, newdata=%d, xfer=%d\n",
                        next_jiffies, pcm_buf_dma_ofs, newdata, xfercount);

        snd_pcm_group_for_each_entry(s, substream) {
                struct snd_card_asihpi_pcm *ds = s->runtime->private_data;

                /* don't link Cap and Play */
                if (substream->stream != s->stream)
                        continue;

                /* Store dma offset for use by pointer callback */
                ds->pcm_buf_dma_ofs = pcm_buf_dma_ofs;

                if (xfercount &&
                        /* Limit use of on card fifo for playback */
                        ((on_card_bytes <= ds->period_bytes) ||
                        (s->stream == SNDRV_PCM_STREAM_CAPTURE)))

                {

                        unsigned int buf_ofs = ds->pcm_buf_host_rw_ofs % ds->buffer_bytes;
                        unsigned int xfer1, xfer2;
                        char *pd = &s->runtime->dma_area[buf_ofs];

                        if (card->can_dma) { /* buffer wrap is handled at lower level */
                                xfer1 = xfercount;
                                xfer2 = 0;
                        } else {
                                xfer1 = min(xfercount, ds->buffer_bytes - buf_ofs);
                                xfer2 = xfercount - xfer1;
                        }

                        if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                                snd_printddd("write1, P=%d, xfer=%d, buf_ofs=%d\n",
                                        s->number, xfer1, buf_ofs);
                                hpi_handle_error(
                                        hpi_outstream_write_buf(
                                                ds->h_stream, pd, xfer1,
                                                &ds->format));

                                if (xfer2) {
                                        pd = s->runtime->dma_area;

                                        snd_printddd("write2, P=%d, xfer=%d, buf_ofs=%d\n",
                                                        s->number,
                                                        xfercount - xfer1, buf_ofs);
                                        hpi_handle_error(
                                                hpi_outstream_write_buf(
                                                        ds->h_stream, pd,
                                                        xfercount - xfer1,
                                                        &ds->format));
                                }
                        } else {
                                snd_printddd("read1, C=%d, xfer=%d\n",
                                        s->number, xfer1);
                                hpi_handle_error(
                                        hpi_instream_read_buf(
                                                ds->h_stream,
                                                pd, xfer1));
                                if (xfer2) {
                                        pd = s->runtime->dma_area;
                                        snd_printddd("read2, C=%d, xfer=%d\n",
                                                s->number, xfer2);
                                        hpi_handle_error(
                                                hpi_instream_read_buf(
                                                        ds->h_stream,
                                                        pd, xfer2));
                                }
                        }
                        /* ? host_rw_ofs always ahead of elapsed_dma_ofs by preload size? */
                        ds->pcm_buf_host_rw_ofs += xfercount;
                        ds->pcm_buf_elapsed_dma_ofs += xfercount;
                        snd_pcm_period_elapsed(s);
                }
        }

        if (!card->hpi->interrupt_mode && dpcm->respawn_timer)
                add_timer(&dpcm->timer);
}

static void snd_card_asihpi_int_task(unsigned long data)
{
        struct hpi_adapter *a = (struct hpi_adapter *)data;
        struct snd_card_asihpi *asihpi;

        WARN_ON(!a || !a->snd_card || !a->snd_card->private_data);
        asihpi = (struct snd_card_asihpi *)a->snd_card->private_data;
        if (asihpi->llmode_streampriv)
                snd_card_asihpi_timer_function(
                        &asihpi->llmode_streampriv->timer);
}

static void snd_card_asihpi_isr(struct hpi_adapter *a)
{
        struct snd_card_asihpi *asihpi;

        WARN_ON(!a || !a->snd_card || !a->snd_card->private_data);
        asihpi = (struct snd_card_asihpi *)a->snd_card->private_data;
        tasklet_schedule(&asihpi->t);
}

/***************************** PLAYBACK OPS ****************/
static int snd_card_asihpi_playback_prepare(struct snd_pcm_substream *
                                            substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;

        snd_printdd("P%d prepare\n", substream->number);

        hpi_handle_error(hpi_outstream_reset(dpcm->h_stream));
        dpcm->pcm_buf_host_rw_ofs = 0;
        dpcm->pcm_buf_dma_ofs = 0;
        dpcm->pcm_buf_elapsed_dma_ofs = 0;
        return 0;
}

static snd_pcm_uframes_t
snd_card_asihpi_playback_pointer(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;
        snd_pcm_uframes_t ptr;
        char name[16];
        snd_pcm_debug_name(substream, name, sizeof(name));

        ptr = bytes_to_frames(runtime, dpcm->pcm_buf_dma_ofs  % dpcm->buffer_bytes);
        snd_printddd("%s, pointer=%ld\n", name, (unsigned long)ptr);
        return ptr;
}

static u64 snd_card_asihpi_playback_formats(struct snd_card_asihpi *asihpi,
                                                u32 h_stream)
{
        struct hpi_format hpi_format;
        u16 format;
        u16 err;
        u32 h_control;
        u32 sample_rate = 48000;
        u64 formats = 0;

        /* on cards without SRC, must query at valid rate,
        * maybe set by external sync
        */
        err = hpi_mixer_get_control(asihpi->h_mixer,
                                  HPI_SOURCENODE_CLOCK_SOURCE, 0, 0, 0,
                                  HPI_CONTROL_SAMPLECLOCK, &h_control);

        if (!err)
                err = hpi_sample_clock_get_sample_rate(h_control,
                                &sample_rate);

        for (format = HPI_FORMAT_PCM8_UNSIGNED;
             format <= HPI_FORMAT_PCM24_SIGNED; format++) {
                err = hpi_format_create(&hpi_format, asihpi->out_max_chans,
                                        format, sample_rate, 128000, 0);
                if (!err)

                        err = hpi_outstream_query_format(h_stream, &hpi_format);
                if (!err && (hpi_to_alsa_formats[format] != INVALID_FORMAT))
                        formats |= pcm_format_to_bits(hpi_to_alsa_formats[format]);
        }
        return formats;
}

static int snd_card_asihpi_playback_open(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm;
        struct snd_card_asihpi *card = snd_pcm_substream_chip(substream);
        struct snd_pcm_hardware snd_card_asihpi_playback;
        int err;

        dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
        if (dpcm == NULL)
                return -ENOMEM;

        err = hpi_outstream_open(card->hpi->adapter->index,
                              substream->number, &dpcm->h_stream);
        hpi_handle_error(err);
        if (err)
                kfree(dpcm);
        if (err == HPI_ERROR_OBJ_ALREADY_OPEN)
                return -EBUSY;
        if (err)
                return -EIO;

        /*? also check ASI5000 samplerate source
            If external, only support external rate.
            If internal and other stream playing, can't switch
        */

        timer_setup(&dpcm->timer, snd_card_asihpi_timer_function, 0);
        dpcm->substream = substream;
        runtime->private_data = dpcm;
        runtime->private_free = snd_card_asihpi_runtime_free;

        memset(&snd_card_asihpi_playback, 0, sizeof(snd_card_asihpi_playback));
        if (!card->hpi->interrupt_mode) {
                snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX;
                snd_card_asihpi_playback.period_bytes_min = PERIOD_BYTES_MIN;
                snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN;
                snd_card_asihpi_playback.periods_min = PERIODS_MIN;
                snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN;
        } else {
                size_t pbmin = card->update_interval_frames *
                        card->out_max_chans;
                snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX;
                snd_card_asihpi_playback.period_bytes_min = pbmin;
                snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN;
                snd_card_asihpi_playback.periods_min = PERIODS_MIN;
                snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / pbmin;
        }

        /* snd_card_asihpi_playback.fifo_size = 0; */
        snd_card_asihpi_playback.channels_max = card->out_max_chans;
        snd_card_asihpi_playback.channels_min = card->out_min_chans;
        snd_card_asihpi_playback.formats =
                        snd_card_asihpi_playback_formats(card, dpcm->h_stream);

        snd_card_asihpi_pcm_samplerates(card,  &snd_card_asihpi_playback);

        snd_card_asihpi_playback.info = SNDRV_PCM_INFO_INTERLEAVED |
                                        SNDRV_PCM_INFO_DOUBLE |
                                        SNDRV_PCM_INFO_BATCH |
                                        SNDRV_PCM_INFO_BLOCK_TRANSFER |
                                        SNDRV_PCM_INFO_PAUSE |
                                        SNDRV_PCM_INFO_MMAP |
                                        SNDRV_PCM_INFO_MMAP_VALID;

        if (card->support_grouping) {
                snd_card_asihpi_playback.info |= SNDRV_PCM_INFO_SYNC_START;
                snd_pcm_set_sync(substream);
        }

        /* struct is copied, so can create initializer dynamically */
        runtime->hw = snd_card_asihpi_playback;

        if (card->can_dma)
                err = snd_pcm_hw_constraint_pow2(runtime, 0,
                                        SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
        if (err < 0)
                return err;

        snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
                card->update_interval_frames);

        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
                card->update_interval_frames, UINT_MAX);

        snd_printdd("playback open\n");

        return 0;
}

static int snd_card_asihpi_playback_close(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;

        hpi_handle_error(hpi_outstream_close(dpcm->h_stream));
        snd_printdd("playback close\n");

        return 0;
}

static const struct snd_pcm_ops snd_card_asihpi_playback_mmap_ops = {
        .open = snd_card_asihpi_playback_open,
        .close = snd_card_asihpi_playback_close,
        .hw_params = snd_card_asihpi_pcm_hw_params,
        .hw_free = snd_card_asihpi_hw_free,
        .prepare = snd_card_asihpi_playback_prepare,
        .trigger = snd_card_asihpi_trigger,
        .pointer = snd_card_asihpi_playback_pointer,
};

/***************************** CAPTURE OPS ****************/
static snd_pcm_uframes_t
snd_card_asihpi_capture_pointer(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;
        char name[16];
        snd_pcm_debug_name(substream, name, sizeof(name));

        snd_printddd("%s, pointer=%d\n", name, dpcm->pcm_buf_dma_ofs);
        /* NOTE Unlike playback can't use actual samples_played
                for the capture position, because those samples aren't yet in
                the local buffer available for reading.
        */
        return bytes_to_frames(runtime, dpcm->pcm_buf_dma_ofs % dpcm->buffer_bytes);
}

static int snd_card_asihpi_capture_prepare(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi_pcm *dpcm = runtime->private_data;

        hpi_handle_error(hpi_instream_reset(dpcm->h_stream));
        dpcm->pcm_buf_host_rw_ofs = 0;
        dpcm->pcm_buf_dma_ofs = 0;
        dpcm->pcm_buf_elapsed_dma_ofs = 0;

        snd_printdd("Capture Prepare %d\n", substream->number);
        return 0;
}

static u64 snd_card_asihpi_capture_formats(struct snd_card_asihpi *asihpi,
                                        u32 h_stream)
{
        struct hpi_format hpi_format;
        u16 format;
        u16 err;
        u32 h_control;
        u32 sample_rate = 48000;
        u64 formats = 0;

        /* on cards without SRC, must query at valid rate,
                maybe set by external sync */
        err = hpi_mixer_get_control(asihpi->h_mixer,
                                  HPI_SOURCENODE_CLOCK_SOURCE, 0, 0, 0,
                                  HPI_CONTROL_SAMPLECLOCK, &h_control);

        if (!err)
                err = hpi_sample_clock_get_sample_rate(h_control,
                        &sample_rate);

        for (format = HPI_FORMAT_PCM8_UNSIGNED;
                format <= HPI_FORMAT_PCM24_SIGNED; format++) {

                err = hpi_format_create(&hpi_format, asihpi->in_max_chans,
                                        format, sample_rate, 128000, 0);
                if (!err)
                        err = hpi_instream_query_format(h_stream, &hpi_format);
                if (!err && (hpi_to_alsa_formats[format] != INVALID_FORMAT))
                        formats |= pcm_format_to_bits(hpi_to_alsa_formats[format]);
        }
        return formats;
}

static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_card_asihpi *card = snd_pcm_substream_chip(substream);
        struct snd_card_asihpi_pcm *dpcm;
        struct snd_pcm_hardware snd_card_asihpi_capture;
        int err;

        dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
        if (dpcm == NULL)
                return -ENOMEM;

        snd_printdd("capture open adapter %d stream %d\n",
                        card->hpi->adapter->index, substream->number);

        err = hpi_handle_error(
            hpi_instream_open(card->hpi->adapter->index,
                             substream->number, &dpcm->h_stream));
        if (err)
                kfree(dpcm);
        if (err == HPI_ERROR_OBJ_ALREADY_OPEN)
                return -EBUSY;
        if (err)
                return -EIO;

        timer_setup(&dpcm->timer, snd_card_asihpi_timer_function, 0);
        dpcm->substream = substream;
        runtime->private_data = dpcm;
        runtime->private_free = snd_card_asihpi_runtime_free;

        memset(&snd_card_asihpi_capture, 0, sizeof(snd_card_asihpi_capture));
        if (!card->hpi->interrupt_mode) {
                snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX;
                snd_card_asihpi_capture.period_bytes_min = PERIOD_BYTES_MIN;
                snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN;
                snd_card_asihpi_capture.periods_min = PERIODS_MIN;
                snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN;
        } else {
                size_t pbmin = card->update_interval_frames *
                        card->out_max_chans;
                snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX;
                snd_card_asihpi_capture.period_bytes_min = pbmin;
                snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN;
                snd_card_asihpi_capture.periods_min = PERIODS_MIN;
                snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / pbmin;
        }
        /* snd_card_asihpi_capture.fifo_size = 0; */
        snd_card_asihpi_capture.channels_max = card->in_max_chans;
        snd_card_asihpi_capture.channels_min = card->in_min_chans;
        snd_card_asihpi_capture.formats =
                snd_card_asihpi_capture_formats(card, dpcm->h_stream);
        snd_card_asihpi_pcm_samplerates(card,  &snd_card_asihpi_capture);
        snd_card_asihpi_capture.info = SNDRV_PCM_INFO_INTERLEAVED |
                                        SNDRV_PCM_INFO_MMAP |
                                        SNDRV_PCM_INFO_MMAP_VALID;

        if (card->support_grouping)
                snd_card_asihpi_capture.info |= SNDRV_PCM_INFO_SYNC_START;

        runtime->hw = snd_card_asihpi_capture;

        if (card->can_dma)
                err = snd_pcm_hw_constraint_pow2(runtime, 0,
                                        SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
        if (err < 0)
                return err;

        snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
                card->update_interval_frames);
        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
                card->update_interval_frames, UINT_MAX);

        snd_pcm_set_sync(substream);

        return 0;
}

static int snd_card_asihpi_capture_close(struct snd_pcm_substream *substream)
{
        struct snd_card_asihpi_pcm *dpcm = substream->runtime->private_data;

        hpi_handle_error(hpi_instream_close(dpcm->h_stream));
        return 0;
}

static const struct snd_pcm_ops snd_card_asihpi_capture_mmap_ops = {
        .open = snd_card_asihpi_capture_open,
        .close = snd_card_asihpi_capture_close,
        .hw_params = snd_card_asihpi_pcm_hw_params,
        .hw_free = snd_card_asihpi_hw_free,
        .prepare = snd_card_asihpi_capture_prepare,
        .trigger = snd_card_asihpi_trigger,
        .pointer = snd_card_asihpi_capture_pointer,
};

static int snd_card_asihpi_pcm_new(struct snd_card_asihpi *asihpi, int device)
{
        struct snd_pcm *pcm;
        int err;
        u16 num_instreams, num_outstreams, x16;
        u32 x32;

        err = hpi_adapter_get_info(asihpi->hpi->adapter->index,
                        &num_outstreams, &num_instreams,
                        &x16, &x32, &x16);

        err = snd_pcm_new(asihpi->card, "Asihpi PCM", device,
                        num_outstreams, num_instreams, &pcm);
        if (err < 0)
                return err;

        /* pointer to ops struct is stored, dont change ops afterwards! */
        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
                        &snd_card_asihpi_playback_mmap_ops);
        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
                        &snd_card_asihpi_capture_mmap_ops);

        pcm->private_data = asihpi;
        pcm->info_flags = 0;
        strcpy(pcm->name, "Asihpi PCM");

        /*? do we want to emulate MMAP for non-BBM cards?
        Jack doesn't work with ALSAs MMAP emulation - WHY NOT? */
        snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
                                       &asihpi->pci->dev,
                                       64*1024, BUFFER_BYTES_MAX);

        return 0;
}

/***************************** MIXER CONTROLS ****************/
struct hpi_control {
        u32 h_control;
        u16 control_type;
        u16 src_node_type;
        u16 src_node_index;
        u16 dst_node_type;
        u16 dst_node_index;
        u16 band;
        char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; /* copied to snd_ctl_elem_id.name[44]; */
};

static const char * const asihpi_tuner_band_names[] = {
        "invalid",
        "AM",
        "FM mono",
        "TV NTSC-M",
        "FM stereo",
        "AUX",
        "TV PAL BG",
        "TV PAL I",
        "TV PAL DK",
        "TV SECAM",
        "TV DAB",
};
/* Number of strings must match the enumerations for HPI_TUNER_BAND in hpi.h */
compile_time_assert(
        (ARRAY_SIZE(asihpi_tuner_band_names) ==
                (HPI_TUNER_BAND_LAST+1)),
        assert_tuner_band_names_size);

static const char * const asihpi_src_names[] = {
        "no source",
        "PCM",
        "Line",
        "Digital",
        "Tuner",
        "RF",
        "Clock",
        "Bitstream",
        "Mic",
        "Net",
        "Analog",
        "Adapter",
        "RTP",
        "Internal",
        "AVB",
        "BLU-Link"
};
/* Number of strings must match the enumerations for HPI_SOURCENODES in hpi.h */
compile_time_assert(
        (ARRAY_SIZE(asihpi_src_names) ==
                (HPI_SOURCENODE_LAST_INDEX-HPI_SOURCENODE_NONE+1)),
        assert_src_names_size);

static const char * const asihpi_dst_names[] = {
        "no destination",
        "PCM",
        "Line",
        "Digital",
        "RF",
        "Speaker",
        "Net",
        "Analog",
        "RTP",
        "AVB",
        "Internal",
        "BLU-Link"
};
/* Number of strings must match the enumerations for HPI_DESTNODES in hpi.h */
compile_time_assert(
        (ARRAY_SIZE(asihpi_dst_names) ==
                (HPI_DESTNODE_LAST_INDEX-HPI_DESTNODE_NONE+1)),
        assert_dst_names_size);

static inline int ctl_add(struct snd_card *card, struct snd_kcontrol_new *ctl,
                                struct snd_card_asihpi *asihpi)
{
        int err;

        err = snd_ctl_add(card, snd_ctl_new1(ctl, asihpi));
        if (err < 0)
                return err;
        else if (mixer_dump)
                dev_info(&asihpi->pci->dev, "added %s(%d)\n", ctl->name, ctl->index);

        return 0;
}

/* Convert HPI control name and location into ALSA control name */
static void asihpi_ctl_init(struct snd_kcontrol_new *snd_control,
                                struct hpi_control *hpi_ctl,
                                char *name)
{
        char *dir;
        memset(snd_control, 0, sizeof(*snd_control));
        snd_control->name = hpi_ctl->name;
        snd_control->private_value = hpi_ctl->h_control;
        snd_control->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
        snd_control->index = 0;

        if (hpi_ctl->src_node_type + HPI_SOURCENODE_NONE == HPI_SOURCENODE_CLOCK_SOURCE)
                dir = ""; /* clock is neither capture nor playback */
        else if (hpi_ctl->dst_node_type + HPI_DESTNODE_NONE == HPI_DESTNODE_ISTREAM)
                dir = "Capture ";  /* On or towards a PCM capture destination*/
        else if ((hpi_ctl->src_node_type + HPI_SOURCENODE_NONE != HPI_SOURCENODE_OSTREAM) &&
                (!hpi_ctl->dst_node_type))
                dir = "Capture "; /* On a source node that is not PCM playback */
        else if (hpi_ctl->src_node_type &&
                (hpi_ctl->src_node_type + HPI_SOURCENODE_NONE != HPI_SOURCENODE_OSTREAM) &&
                (hpi_ctl->dst_node_type))
                dir = "Monitor Playback "; /* Between an input and an output */
        else
                dir = "Playback "; /* PCM Playback source, or  output node */

        if (hpi_ctl->src_node_type && hpi_ctl->dst_node_type)
                sprintf(hpi_ctl->name, "%s %d %s %d %s%s",
                        asihpi_src_names[hpi_ctl->src_node_type],
                        hpi_ctl->src_node_index,
                        asihpi_dst_names[hpi_ctl->dst_node_type],
                        hpi_ctl->dst_node_index,
                        dir, name);
        else if (hpi_ctl->dst_node_type) {
                sprintf(hpi_ctl->name, "%s %d %s%s",
                asihpi_dst_names[hpi_ctl->dst_node_type],
                hpi_ctl->dst_node_index,
                dir, name);
        } else {
                sprintf(hpi_ctl->name, "%s %d %s%s",
                asihpi_src_names[hpi_ctl->src_node_type],
                hpi_ctl->src_node_index,
                dir, name);
        }
        /* printk(KERN_INFO "Adding %s %d to %d ",  hpi_ctl->name,
                hpi_ctl->wSrcNodeType, hpi_ctl->wDstNodeType); */
}

/*------------------------------------------------------------
   Volume controls
 ------------------------------------------------------------*/
#define VOL_STEP_mB 1
static int snd_asihpi_volume_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        u32 h_control = kcontrol->private_value;
        u32 count;
        u16 err;
        /* native gains are in millibels */
        short min_gain_mB;
        short max_gain_mB;
        short step_gain_mB;

        err = hpi_volume_query_range(h_control,
                        &min_gain_mB, &max_gain_mB, &step_gain_mB);
        if (err) {
                max_gain_mB = 0;
                min_gain_mB = -10000;
                step_gain_mB = VOL_STEP_mB;
        }

        err = hpi_meter_query_channels(h_control, &count);
        if (err)
                count = HPI_MAX_CHANNELS;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = count;
        uinfo->value.integer.min = min_gain_mB / VOL_STEP_mB;
        uinfo->value.integer.max = max_gain_mB / VOL_STEP_mB;
        uinfo->value.integer.step = step_gain_mB / VOL_STEP_mB;
        return 0;
}

static int snd_asihpi_volume_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        short an_gain_mB[HPI_MAX_CHANNELS];

        hpi_handle_error(hpi_volume_get_gain(h_control, an_gain_mB));
        ucontrol->value.integer.value[0] = an_gain_mB[0] / VOL_STEP_mB;
        ucontrol->value.integer.value[1] = an_gain_mB[1] / VOL_STEP_mB;

        return 0;
}

static int snd_asihpi_volume_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        short an_gain_mB[HPI_MAX_CHANNELS];

        an_gain_mB[0] =
            (ucontrol->value.integer.value[0]) * VOL_STEP_mB;
        an_gain_mB[1] =
            (ucontrol->value.integer.value[1]) * VOL_STEP_mB;
        /*  change = asihpi->mixer_volume[addr][0] != left ||
           asihpi->mixer_volume[addr][1] != right;
         */
        hpi_handle_error(hpi_volume_set_gain(h_control, an_gain_mB));
        return 1;
}

static const DECLARE_TLV_DB_SCALE(db_scale_100, -10000, VOL_STEP_mB, 0);

#define snd_asihpi_volume_mute_info     snd_ctl_boolean_mono_info

static int snd_asihpi_volume_mute_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u32 mute;

        hpi_handle_error(hpi_volume_get_mute(h_control, &mute));
        ucontrol->value.integer.value[0] = mute ? 0 : 1;

        return 0;
}

static int snd_asihpi_volume_mute_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        /* HPI currently only supports all or none muting of multichannel volume
        ALSA Switch element has opposite sense to HPI mute: on==unmuted, off=muted
        */
        int mute =  ucontrol->value.integer.value[0] ? 0 : HPI_BITMASK_ALL_CHANNELS;
        hpi_handle_error(hpi_volume_set_mute(h_control, mute));
        return 1;
}

static int snd_asihpi_volume_add(struct snd_card_asihpi *asihpi,
                                 struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;
        int err;
        u32 mute;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Volume");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
                                SNDRV_CTL_ELEM_ACCESS_TLV_READ;
        snd_control.info = snd_asihpi_volume_info;
        snd_control.get = snd_asihpi_volume_get;
        snd_control.put = snd_asihpi_volume_put;
        snd_control.tlv.p = db_scale_100;

        err = ctl_add(card, &snd_control, asihpi);
        if (err)
                return err;

        if (hpi_volume_get_mute(hpi_ctl->h_control, &mute) == 0) {
                asihpi_ctl_init(&snd_control, hpi_ctl, "Switch");
                snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
                snd_control.info = snd_asihpi_volume_mute_info;
                snd_control.get = snd_asihpi_volume_mute_get;
                snd_control.put = snd_asihpi_volume_mute_put;
                err = ctl_add(card, &snd_control, asihpi);
        }
        return err;
}

/*------------------------------------------------------------
   Level controls
 ------------------------------------------------------------*/
static int snd_asihpi_level_info(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_info *uinfo)
{
        u32 h_control = kcontrol->private_value;
        u16 err;
        short min_gain_mB;
        short max_gain_mB;
        short step_gain_mB;

        err =
            hpi_level_query_range(h_control, &min_gain_mB,
                               &max_gain_mB, &step_gain_mB);
        if (err) {
                max_gain_mB = 2400;
                min_gain_mB = -1000;
                step_gain_mB = 100;
        }

        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 2;
        uinfo->value.integer.min = min_gain_mB / HPI_UNITS_PER_dB;
        uinfo->value.integer.max = max_gain_mB / HPI_UNITS_PER_dB;
        uinfo->value.integer.step = step_gain_mB / HPI_UNITS_PER_dB;
        return 0;
}

static int snd_asihpi_level_get(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        short an_gain_mB[HPI_MAX_CHANNELS];

        hpi_handle_error(hpi_level_get_gain(h_control, an_gain_mB));
        ucontrol->value.integer.value[0] =
            an_gain_mB[0] / HPI_UNITS_PER_dB;
        ucontrol->value.integer.value[1] =
            an_gain_mB[1] / HPI_UNITS_PER_dB;

        return 0;
}

static int snd_asihpi_level_put(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        int change;
        u32 h_control = kcontrol->private_value;
        short an_gain_mB[HPI_MAX_CHANNELS];

        an_gain_mB[0] =
            (ucontrol->value.integer.value[0]) * HPI_UNITS_PER_dB;
        an_gain_mB[1] =
            (ucontrol->value.integer.value[1]) * HPI_UNITS_PER_dB;
        /*  change = asihpi->mixer_level[addr][0] != left ||
           asihpi->mixer_level[addr][1] != right;
         */
        change = 1;
        hpi_handle_error(hpi_level_set_gain(h_control, an_gain_mB));
        return change;
}

static const DECLARE_TLV_DB_SCALE(db_scale_level, -1000, 100, 0);

static int snd_asihpi_level_add(struct snd_card_asihpi *asihpi,
                                struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        /* can't use 'volume' cos some nodes have volume as well */
        asihpi_ctl_init(&snd_control, hpi_ctl, "Level");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
                                SNDRV_CTL_ELEM_ACCESS_TLV_READ;
        snd_control.info = snd_asihpi_level_info;
        snd_control.get = snd_asihpi_level_get;
        snd_control.put = snd_asihpi_level_put;
        snd_control.tlv.p = db_scale_level;

        return ctl_add(card, &snd_control, asihpi);
}

/*------------------------------------------------------------
   AESEBU controls
 ------------------------------------------------------------*/

/* AESEBU format */
static const char * const asihpi_aesebu_format_names[] = {
        "N/A", "S/PDIF", "AES/EBU" };

static int snd_asihpi_aesebu_format_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        return snd_ctl_enum_info(uinfo, 1, 3, asihpi_aesebu_format_names);
}

static int snd_asihpi_aesebu_format_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol,
                        u16 (*func)(u32, u16 *))
{
        u32 h_control = kcontrol->private_value;
        u16 source, err;

        err = func(h_control, &source);

        /* default to N/A */
        ucontrol->value.enumerated.item[0] = 0;
        /* return success but set the control to N/A */
        if (err)
                return 0;
        if (source == HPI_AESEBU_FORMAT_SPDIF)
                ucontrol->value.enumerated.item[0] = 1;
        if (source == HPI_AESEBU_FORMAT_AESEBU)
                ucontrol->value.enumerated.item[0] = 2;

        return 0;
}

static int snd_asihpi_aesebu_format_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol,
                         u16 (*func)(u32, u16))
{
        u32 h_control = kcontrol->private_value;

        /* default to S/PDIF */
        u16 source = HPI_AESEBU_FORMAT_SPDIF;

        if (ucontrol->value.enumerated.item[0] == 1)
                source = HPI_AESEBU_FORMAT_SPDIF;
        if (ucontrol->value.enumerated.item[0] == 2)
                source = HPI_AESEBU_FORMAT_AESEBU;

        if (func(h_control, source) != 0)
                return -EINVAL;

        return 1;
}

static int snd_asihpi_aesebu_rx_format_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol) {
        return snd_asihpi_aesebu_format_get(kcontrol, ucontrol,
                                        hpi_aesebu_receiver_get_format);
}

static int snd_asihpi_aesebu_rx_format_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol) {
        return snd_asihpi_aesebu_format_put(kcontrol, ucontrol,
                                        hpi_aesebu_receiver_set_format);
}

static int snd_asihpi_aesebu_rxstatus_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 1;

        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = 0X1F;
        uinfo->value.integer.step = 1;

        return 0;
}

static int snd_asihpi_aesebu_rxstatus_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol) {

        u32 h_control = kcontrol->private_value;
        u16 status;

        hpi_handle_error(hpi_aesebu_receiver_get_error_status(
                                         h_control, &status));
        ucontrol->value.integer.value[0] = status;
        return 0;
}

static int snd_asihpi_aesebu_rx_add(struct snd_card_asihpi *asihpi,
                                    struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Format");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
        snd_control.info = snd_asihpi_aesebu_format_info;
        snd_control.get = snd_asihpi_aesebu_rx_format_get;
        snd_control.put = snd_asihpi_aesebu_rx_format_put;


        if (ctl_add(card, &snd_control, asihpi) < 0)
                return -EINVAL;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Status");
        snd_control.access =
            SNDRV_CTL_ELEM_ACCESS_VOLATILE | SNDRV_CTL_ELEM_ACCESS_READ;
        snd_control.info = snd_asihpi_aesebu_rxstatus_info;
        snd_control.get = snd_asihpi_aesebu_rxstatus_get;

        return ctl_add(card, &snd_control, asihpi);
}

static int snd_asihpi_aesebu_tx_format_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol) {
        return snd_asihpi_aesebu_format_get(kcontrol, ucontrol,
                                        hpi_aesebu_transmitter_get_format);
}

static int snd_asihpi_aesebu_tx_format_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol) {
        return snd_asihpi_aesebu_format_put(kcontrol, ucontrol,
                                        hpi_aesebu_transmitter_set_format);
}


static int snd_asihpi_aesebu_tx_add(struct snd_card_asihpi *asihpi,
                                    struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Format");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
        snd_control.info = snd_asihpi_aesebu_format_info;
        snd_control.get = snd_asihpi_aesebu_tx_format_get;
        snd_control.put = snd_asihpi_aesebu_tx_format_put;

        return ctl_add(card, &snd_control, asihpi);
}

/*------------------------------------------------------------
   Tuner controls
 ------------------------------------------------------------*/

/* Gain */

static int snd_asihpi_tuner_gain_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        u32 h_control = kcontrol->private_value;
        u16 err;
        short idx;
        u16 gain_range[3];

        for (idx = 0; idx < 3; idx++) {
                err = hpi_tuner_query_gain(h_control,
                                          idx, &gain_range[idx]);
                if (err != 0)
                        return err;
        }

        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 1;
        uinfo->value.integer.min = ((int)gain_range[0]) / HPI_UNITS_PER_dB;
        uinfo->value.integer.max = ((int)gain_range[1]) / HPI_UNITS_PER_dB;
        uinfo->value.integer.step = ((int) gain_range[2]) / HPI_UNITS_PER_dB;
        return 0;
}

static int snd_asihpi_tuner_gain_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        /*
        struct snd_card_asihpi *asihpi = snd_kcontrol_chip(kcontrol);
        */
        u32 h_control = kcontrol->private_value;
        short gain;

        hpi_handle_error(hpi_tuner_get_gain(h_control, &gain));
        ucontrol->value.integer.value[0] = gain / HPI_UNITS_PER_dB;

        return 0;
}

static int snd_asihpi_tuner_gain_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        /*
        struct snd_card_asihpi *asihpi = snd_kcontrol_chip(kcontrol);
        */
        u32 h_control = kcontrol->private_value;
        short gain;

        gain = (ucontrol->value.integer.value[0]) * HPI_UNITS_PER_dB;
        hpi_handle_error(hpi_tuner_set_gain(h_control, gain));

        return 1;
}

/* Band  */

static int asihpi_tuner_band_query(struct snd_kcontrol *kcontrol,
                                        u16 *band_list, u32 len) {
        u32 h_control = kcontrol->private_value;
        u16 err = 0;
        u32 i;

        for (i = 0; i < len; i++) {
                err = hpi_tuner_query_band(
                                h_control, i, &band_list[i]);
                if (err != 0)
                        break;
        }

        if (err && (err != HPI_ERROR_INVALID_OBJ_INDEX))
                return -EIO;

        return i;
}

static int snd_asihpi_tuner_band_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        u16 tuner_bands[HPI_TUNER_BAND_LAST];
        int num_bands = 0;

        num_bands = asihpi_tuner_band_query(kcontrol, tuner_bands,
                                HPI_TUNER_BAND_LAST);

        if (num_bands < 0)
                return num_bands;

        return snd_ctl_enum_info(uinfo, 1, num_bands, asihpi_tuner_band_names);
}

static int snd_asihpi_tuner_band_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        /*
        struct snd_card_asihpi *asihpi = snd_kcontrol_chip(kcontrol);
        */
        u16 band, idx;
        u16 tuner_bands[HPI_TUNER_BAND_LAST];
        u32 num_bands = 0;

        num_bands = asihpi_tuner_band_query(kcontrol, tuner_bands,
                                HPI_TUNER_BAND_LAST);

        hpi_handle_error(hpi_tuner_get_band(h_control, &band));

        ucontrol->value.enumerated.item[0] = -1;
        for (idx = 0; idx < HPI_TUNER_BAND_LAST; idx++)
                if (tuner_bands[idx] == band) {
                        ucontrol->value.enumerated.item[0] = idx;
                        break;
                }

        return 0;
}

static int snd_asihpi_tuner_band_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        /*
        struct snd_card_asihpi *asihpi = snd_kcontrol_chip(kcontrol);
        */
        u32 h_control = kcontrol->private_value;
        unsigned int idx;
        u16 band;
        u16 tuner_bands[HPI_TUNER_BAND_LAST];
        u32 num_bands = 0;

        num_bands = asihpi_tuner_band_query(kcontrol, tuner_bands,
                        HPI_TUNER_BAND_LAST);

        idx = ucontrol->value.enumerated.item[0];
        if (idx >= ARRAY_SIZE(tuner_bands))
                idx = ARRAY_SIZE(tuner_bands) - 1;
        band = tuner_bands[idx];
        hpi_handle_error(hpi_tuner_set_band(h_control, band));

        return 1;
}

/* Freq */

static int snd_asihpi_tuner_freq_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        u32 h_control = kcontrol->private_value;
        u16 err;
        u16 tuner_bands[HPI_TUNER_BAND_LAST];
        u16 num_bands = 0, band_iter, idx;
        u32 freq_range[3], temp_freq_range[3];

        num_bands = asihpi_tuner_band_query(kcontrol, tuner_bands,
                        HPI_TUNER_BAND_LAST);

        freq_range[0] = INT_MAX;
        freq_range[1] = 0;
        freq_range[2] = INT_MAX;

        for (band_iter = 0; band_iter < num_bands; band_iter++) {
                for (idx = 0; idx < 3; idx++) {
                        err = hpi_tuner_query_frequency(h_control,
                                idx, tuner_bands[band_iter],
                                &temp_freq_range[idx]);
                        if (err != 0)
                                return err;
                }

                /* skip band with bogus stepping */
                if (temp_freq_range[2] <= 0)
                        continue;

                if (temp_freq_range[0] < freq_range[0])
                        freq_range[0] = temp_freq_range[0];
                if (temp_freq_range[1] > freq_range[1])
                        freq_range[1] = temp_freq_range[1];
                if (temp_freq_range[2] < freq_range[2])
                        freq_range[2] = temp_freq_range[2];
        }

        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 1;
        uinfo->value.integer.min = ((int)freq_range[0]);
        uinfo->value.integer.max = ((int)freq_range[1]);
        uinfo->value.integer.step = ((int)freq_range[2]);
        return 0;
}

static int snd_asihpi_tuner_freq_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u32 freq;

        hpi_handle_error(hpi_tuner_get_frequency(h_control, &freq));
        ucontrol->value.integer.value[0] = freq;

        return 0;
}

static int snd_asihpi_tuner_freq_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u32 freq;

        freq = ucontrol->value.integer.value[0];
        hpi_handle_error(hpi_tuner_set_frequency(h_control, freq));

        return 1;
}

/* Tuner control group initializer  */
static int snd_asihpi_tuner_add(struct snd_card_asihpi *asihpi,
                                struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        snd_control.private_value = hpi_ctl->h_control;
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;

        if (!hpi_tuner_get_gain(hpi_ctl->h_control, NULL)) {
                asihpi_ctl_init(&snd_control, hpi_ctl, "Gain");
                snd_control.info = snd_asihpi_tuner_gain_info;
                snd_control.get = snd_asihpi_tuner_gain_get;
                snd_control.put = snd_asihpi_tuner_gain_put;

                if (ctl_add(card, &snd_control, asihpi) < 0)
                        return -EINVAL;
        }

        asihpi_ctl_init(&snd_control, hpi_ctl, "Band");
        snd_control.info = snd_asihpi_tuner_band_info;
        snd_control.get = snd_asihpi_tuner_band_get;
        snd_control.put = snd_asihpi_tuner_band_put;

        if (ctl_add(card, &snd_control, asihpi) < 0)
                return -EINVAL;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Freq");
        snd_control.info = snd_asihpi_tuner_freq_info;
        snd_control.get = snd_asihpi_tuner_freq_get;
        snd_control.put = snd_asihpi_tuner_freq_put;

        return ctl_add(card, &snd_control, asihpi);
}

/*------------------------------------------------------------
   Meter controls
 ------------------------------------------------------------*/
static int snd_asihpi_meter_info(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_info *uinfo)
{
        u32 h_control = kcontrol->private_value;
        u32 count;
        u16 err;
        err = hpi_meter_query_channels(h_control, &count);
        if (err)
                count = HPI_MAX_CHANNELS;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = count;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = 0x7FFFFFFF;
        return 0;
}

/* linear values for 10dB steps */
static const int log2lin[] = {
        0x7FFFFFFF, /* 0dB */
        679093956,
        214748365,
         67909396,
         21474837,
          6790940,
          2147484, /* -60dB */
           679094,
           214748, /* -80 */
            67909,
            21475, /* -100 */
             6791,
             2147,
              679,
              214,
               68,
               21,
                7,
                2
};

static int snd_asihpi_meter_get(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        short an_gain_mB[HPI_MAX_CHANNELS], i;
        u16 err;

        err = hpi_meter_get_peak(h_control, an_gain_mB);

        for (i = 0; i < HPI_MAX_CHANNELS; i++) {
                if (err) {
                        ucontrol->value.integer.value[i] = 0;
                } else if (an_gain_mB[i] >= 0) {
                        ucontrol->value.integer.value[i] =
                                an_gain_mB[i] << 16;
                } else {
                        /* -ve is log value in millibels < -60dB,
                        * convert to (roughly!) linear,
                        */
                        ucontrol->value.integer.value[i] =
                                        log2lin[an_gain_mB[i] / -1000];
                }
        }
        return 0;
}

static int snd_asihpi_meter_add(struct snd_card_asihpi *asihpi,
                                struct hpi_control *hpi_ctl, int subidx)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Meter");
        snd_control.access =
            SNDRV_CTL_ELEM_ACCESS_VOLATILE | SNDRV_CTL_ELEM_ACCESS_READ;
        snd_control.info = snd_asihpi_meter_info;
        snd_control.get = snd_asihpi_meter_get;

        snd_control.index = subidx;

        return ctl_add(card, &snd_control, asihpi);
}

/*------------------------------------------------------------
   Multiplexer controls
 ------------------------------------------------------------*/
static int snd_card_asihpi_mux_count_sources(struct snd_kcontrol *snd_control)
{
        u32 h_control = snd_control->private_value;
        struct hpi_control hpi_ctl;
        int s, err;
        for (s = 0; s < 32; s++) {
                err = hpi_multiplexer_query_source(h_control, s,
                                                  &hpi_ctl.
                                                  src_node_type,
                                                  &hpi_ctl.
                                                  src_node_index);
                if (err)
                        break;
        }
        return s;
}

static int snd_asihpi_mux_info(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_info *uinfo)
{
        int err;
        u16 src_node_type, src_node_index;
        u32 h_control = kcontrol->private_value;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        uinfo->value.enumerated.items =
            snd_card_asihpi_mux_count_sources(kcontrol);

        if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
                uinfo->value.enumerated.item =
                    uinfo->value.enumerated.items - 1;

        err =
            hpi_multiplexer_query_source(h_control,
                                        uinfo->value.enumerated.item,
                                        &src_node_type, &src_node_index);

        sprintf(uinfo->value.enumerated.name, "%s %d",
                asihpi_src_names[src_node_type - HPI_SOURCENODE_NONE],
                src_node_index);
        return 0;
}

static int snd_asihpi_mux_get(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u16 source_type, source_index;
        u16 src_node_type, src_node_index;
        int s;

        hpi_handle_error(hpi_multiplexer_get_source(h_control,
                                &source_type, &source_index));
        /* Should cache this search result! */
        for (s = 0; s < 256; s++) {
                if (hpi_multiplexer_query_source(h_control, s,
                                            &src_node_type, &src_node_index))
                        break;

                if ((source_type == src_node_type)
                    && (source_index == src_node_index)) {
                        ucontrol->value.enumerated.item[0] = s;
                        return 0;
                }
        }
        snd_printd(KERN_WARNING
                "Control %x failed to match mux source %hu %hu\n",
                h_control, source_type, source_index);
        ucontrol->value.enumerated.item[0] = 0;
        return 0;
}

static int snd_asihpi_mux_put(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        int change;
        u32 h_control = kcontrol->private_value;
        u16 source_type, source_index;
        u16 e;

        change = 1;

        e = hpi_multiplexer_query_source(h_control,
                                    ucontrol->value.enumerated.item[0],
                                    &source_type, &source_index);
        if (!e)
                hpi_handle_error(
                        hpi_multiplexer_set_source(h_control,
                                                source_type, source_index));
        return change;
}


static int  snd_asihpi_mux_add(struct snd_card_asihpi *asihpi,
                               struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Route");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
        snd_control.info = snd_asihpi_mux_info;
        snd_control.get = snd_asihpi_mux_get;
        snd_control.put = snd_asihpi_mux_put;

        return ctl_add(card, &snd_control, asihpi);

}

/*------------------------------------------------------------
   Channel mode controls
 ------------------------------------------------------------*/
static int snd_asihpi_cmode_info(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_info *uinfo)
{
        static const char * const mode_names[HPI_CHANNEL_MODE_LAST + 1] = {
                "invalid",
                "Normal", "Swap",
                "From Left", "From Right",
                "To Left", "To Right"
        };

        u32 h_control = kcontrol->private_value;
        u16 mode;
        int i;
        const char *mapped_names[6];
        int valid_modes = 0;

        /* HPI channel mode values can be from 1 to 6
        Some adapters only support a contiguous subset
        */
        for (i = 0; i < HPI_CHANNEL_MODE_LAST; i++)
                if (!hpi_channel_mode_query_mode(
                        h_control, i, &mode)) {
                        mapped_names[valid_modes] = mode_names[mode];
                        valid_modes++;
                        }

        if (!valid_modes)
                return -EINVAL;

        return snd_ctl_enum_info(uinfo, 1, valid_modes, mapped_names);
}

static int snd_asihpi_cmode_get(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u16 mode;

        if (hpi_channel_mode_get(h_control, &mode))
                mode = 1;

        ucontrol->value.enumerated.item[0] = mode - 1;

        return 0;
}

static int snd_asihpi_cmode_put(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        int change;
        u32 h_control = kcontrol->private_value;

        change = 1;

        hpi_handle_error(hpi_channel_mode_set(h_control,
                           ucontrol->value.enumerated.item[0] + 1));
        return change;
}


static int snd_asihpi_cmode_add(struct snd_card_asihpi *asihpi,
                                struct hpi_control *hpi_ctl)
{
        struct snd_card *card = asihpi->card;
        struct snd_kcontrol_new snd_control;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Mode");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
        snd_control.info = snd_asihpi_cmode_info;
        snd_control.get = snd_asihpi_cmode_get;
        snd_control.put = snd_asihpi_cmode_put;

        return ctl_add(card, &snd_control, asihpi);
}

/*------------------------------------------------------------
   Sampleclock source  controls
 ------------------------------------------------------------*/
static const char * const sampleclock_sources[] = {
        "N/A", "Local PLL", "Digital Sync", "Word External", "Word Header",
        "SMPTE", "Digital1", "Auto", "Network", "Invalid",
        "Prev Module", "BLU-Link",
        "Digital2", "Digital3", "Digital4", "Digital5",
        "Digital6", "Digital7", "Digital8"};

        /* Number of strings must match expected enumerated values */
        compile_time_assert(
                (ARRAY_SIZE(sampleclock_sources) == MAX_CLOCKSOURCES),
                assert_sampleclock_sources_size);

static int snd_asihpi_clksrc_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        struct snd_card_asihpi *asihpi =
                        (struct snd_card_asihpi *)(kcontrol->private_data);
        struct clk_cache *clkcache = &asihpi->cc;
        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        uinfo->value.enumerated.items = clkcache->count;

        if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
                uinfo->value.enumerated.item =
                                uinfo->value.enumerated.items - 1;

        strcpy(uinfo->value.enumerated.name,
               clkcache->s[uinfo->value.enumerated.item].name);
        return 0;
}

static int snd_asihpi_clksrc_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct snd_card_asihpi *asihpi =
                        (struct snd_card_asihpi *)(kcontrol->private_data);
        struct clk_cache *clkcache = &asihpi->cc;
        u32 h_control = kcontrol->private_value;
        u16 source, srcindex = 0;
        int i;

        ucontrol->value.enumerated.item[0] = 0;
        if (hpi_sample_clock_get_source(h_control, &source))
                source = 0;

        if (source == HPI_SAMPLECLOCK_SOURCE_AESEBU_INPUT)
                if (hpi_sample_clock_get_source_index(h_control, &srcindex))
                        srcindex = 0;

        for (i = 0; i < clkcache->count; i++)
                if ((clkcache->s[i].source == source) &&
                        (clkcache->s[i].index == srcindex))
                        break;

        ucontrol->value.enumerated.item[0] = i;

        return 0;
}

static int snd_asihpi_clksrc_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct snd_card_asihpi *asihpi =
                        (struct snd_card_asihpi *)(kcontrol->private_data);
        struct clk_cache *clkcache = &asihpi->cc;
        unsigned int item;
        int change;
        u32 h_control = kcontrol->private_value;

        change = 1;
        item = ucontrol->value.enumerated.item[0];
        if (item >= clkcache->count)
                item = clkcache->count-1;

        hpi_handle_error(hpi_sample_clock_set_source(
                                h_control, clkcache->s[item].source));

        if (clkcache->s[item].source == HPI_SAMPLECLOCK_SOURCE_AESEBU_INPUT)
                hpi_handle_error(hpi_sample_clock_set_source_index(
                                h_control, clkcache->s[item].index));
        return change;
}

/*------------------------------------------------------------
   Clkrate controls
 ------------------------------------------------------------*/
/* Need to change this to enumerated control with list of rates */
static int snd_asihpi_clklocal_info(struct snd_kcontrol *kcontrol,
                                   struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 1;
        uinfo->value.integer.min = 8000;
        uinfo->value.integer.max = 192000;
        uinfo->value.integer.step = 100;

        return 0;
}

static int snd_asihpi_clklocal_get(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u32 rate;
        u16 e;

        e = hpi_sample_clock_get_local_rate(h_control, &rate);
        if (!e)
                ucontrol->value.integer.value[0] = rate;
        else
                ucontrol->value.integer.value[0] = 0;
        return 0;
}

static int snd_asihpi_clklocal_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        int change;
        u32 h_control = kcontrol->private_value;

        /*  change = asihpi->mixer_clkrate[addr][0] != left ||
           asihpi->mixer_clkrate[addr][1] != right;
         */
        change = 1;
        hpi_handle_error(hpi_sample_clock_set_local_rate(h_control,
                                      ucontrol->value.integer.value[0]));
        return change;
}

static int snd_asihpi_clkrate_info(struct snd_kcontrol *kcontrol,
                                   struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 1;
        uinfo->value.integer.min = 8000;
        uinfo->value.integer.max = 192000;
        uinfo->value.integer.step = 100;

        return 0;
}

static int snd_asihpi_clkrate_get(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        u32 h_control = kcontrol->private_value;
        u32 rate;
        u16 e;

        e = hpi_sample_clock_get_sample_rate(h_control, &rate);
        if (!e)
                ucontrol->value.integer.value[0] = rate;
        else
                ucontrol->value.integer.value[0] = 0;
        return 0;
}

static int snd_asihpi_sampleclock_add(struct snd_card_asihpi *asihpi,
                                      struct hpi_control *hpi_ctl)
{
        struct snd_card *card;
        struct snd_kcontrol_new snd_control;

        struct clk_cache *clkcache;
        u32 hSC =  hpi_ctl->h_control;
        int has_aes_in = 0;
        int i, j;
        u16 source;

        if (snd_BUG_ON(!asihpi))
                return -EINVAL;
        card = asihpi->card;
        clkcache = &asihpi->cc;
        snd_control.private_value = hpi_ctl->h_control;

        clkcache->has_local = 0;

        for (i = 0; i <= HPI_SAMPLECLOCK_SOURCE_LAST; i++) {
                if  (hpi_sample_clock_query_source(hSC,
                                i, &source))
                        break;
                clkcache->s[i].source = source;
                clkcache->s[i].index = 0;
                clkcache->s[i].name = sampleclock_sources[source];
                if (source == HPI_SAMPLECLOCK_SOURCE_AESEBU_INPUT)
                        has_aes_in = 1;
                if (source == HPI_SAMPLECLOCK_SOURCE_LOCAL)
                        clkcache->has_local = 1;
        }
        if (has_aes_in)
                /* already will have picked up index 0 above */
                for (j = 1; j < 8; j++) {
                        if (hpi_sample_clock_query_source_index(hSC,
                                j, HPI_SAMPLECLOCK_SOURCE_AESEBU_INPUT,
                                &source))
                                break;
                        clkcache->s[i].source =
                                HPI_SAMPLECLOCK_SOURCE_AESEBU_INPUT;
                        clkcache->s[i].index = j;
                        clkcache->s[i].name = sampleclock_sources[
                                        j+HPI_SAMPLECLOCK_SOURCE_LAST];
                        i++;
                }
        clkcache->count = i;

        asihpi_ctl_init(&snd_control, hpi_ctl, "Source");
        snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE ;
        snd_control.info = snd_asihpi_clksrc_info;
        snd_control.get = snd_asihpi_clksrc_get;
        snd_control.put = snd_asihpi_clksrc_put;
        if (ctl_add(card, &snd_control, asihpi) < 0)
                return -EINVAL;


        if (clkcache->has_local) {
                asihpi_ctl_init(&snd_control, hpi_ctl, "Localrate");
                snd_control.access = SNDRV_CTL_ELEM_ACCESS_READWRITE ;
                snd_control.info = snd_asihpi_clklocal_info;
                snd_control.get = snd_asihpi_clklocal_get;
                snd_control.put = snd_asihpi_clklocal_put;


                if (ctl_add(card, &snd_control, asihpi) < 0)
                        return -EINVAL;
        }

        asihpi_ctl_init(&snd_control, hpi_ctl, "Rate");
        snd_control.access =
            SNDRV_CTL_ELEM_ACCESS_VOLATILE | SNDRV_CTL_ELEM_ACCESS_READ;
        snd_control.info = snd_asihpi_clkrate_info;
        snd_control.get = snd_asihpi_clkrate_get;

        return ctl_add(card, &snd_control, asihpi);
}
/*------------------------------------------------------------
   Mixer
 ------------------------------------------------------------*/

static int snd_card_asihpi_mixer_new(struct snd_card_asihpi *asihpi)
{
        struct snd_card *card;
        unsigned int idx = 0;
        unsigned int subindex = 0;
        int err;
        struct hpi_control hpi_ctl, prev_ctl;

        if (snd_BUG_ON(!asihpi))
                return -EINVAL;
        card = asihpi->card;
        strcpy(card->mixername, "Asihpi Mixer");

        err =
            hpi_mixer_open(asihpi->hpi->adapter->index,
                          &asihpi->h_mixer);
        hpi_handle_error(err);
        if (err)
                return -err;

        memset(&prev_ctl, 0, sizeof(prev_ctl));
        prev_ctl.control_type = -1;

        for (idx = 0; idx < 2000; idx++) {
                err = hpi_mixer_get_control_by_index(
                                asihpi->h_mixer,
                                idx,
                                &hpi_ctl.src_node_type,
                                &hpi_ctl.src_node_index,
                                &hpi_ctl.dst_node_type,
                                &hpi_ctl.dst_node_index,
                                &hpi_ctl.control_type,
                                &hpi_ctl.h_control);
                if (err) {
                        if (err == HPI_ERROR_CONTROL_DISABLED) {
                                if (mixer_dump)
                                        dev_info(&asihpi->pci->dev,
                                                   "Disabled HPI Control(%d)\n",
                                                   idx);
                                continue;
                        } else
                                break;

                }

                hpi_ctl.src_node_type -= HPI_SOURCENODE_NONE;
                hpi_ctl.dst_node_type -= HPI_DESTNODE_NONE;

                /* ASI50xx in SSX mode has multiple meters on the same node.
                   Use subindex to create distinct ALSA controls
                   for any duplicated controls.
                */
                if ((hpi_ctl.control_type == prev_ctl.control_type) &&
                    (hpi_ctl.src_node_type == prev_ctl.src_node_type) &&
                    (hpi_ctl.src_node_index == prev_ctl.src_node_index) &&
                    (hpi_ctl.dst_node_type == prev_ctl.dst_node_type) &&
                    (hpi_ctl.dst_node_index == prev_ctl.dst_node_index))
                        subindex++;
                else
                        subindex = 0;

                prev_ctl = hpi_ctl;

                switch (hpi_ctl.control_type) {
                case HPI_CONTROL_VOLUME:
                        err = snd_asihpi_volume_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_LEVEL:
                        err = snd_asihpi_level_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_MULTIPLEXER:
                        err = snd_asihpi_mux_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_CHANNEL_MODE:
                        err = snd_asihpi_cmode_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_METER:
                        err = snd_asihpi_meter_add(asihpi, &hpi_ctl, subindex);
                        break;
                case HPI_CONTROL_SAMPLECLOCK:
                        err = snd_asihpi_sampleclock_add(
                                                asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_CONNECTION:    /* ignore these */
                        continue;
                case HPI_CONTROL_TUNER:
                        err = snd_asihpi_tuner_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_AESEBU_TRANSMITTER:
                        err = snd_asihpi_aesebu_tx_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_AESEBU_RECEIVER:
                        err = snd_asihpi_aesebu_rx_add(asihpi, &hpi_ctl);
                        break;
                case HPI_CONTROL_VOX:
                case HPI_CONTROL_BITSTREAM:
                case HPI_CONTROL_MICROPHONE:
                case HPI_CONTROL_PARAMETRIC_EQ:
                case HPI_CONTROL_COMPANDER:
                default:
                        if (mixer_dump)
                                dev_info(&asihpi->pci->dev,
                                        "Untranslated HPI Control (%d) %d %d %d %d %d\n",
                                        idx,
                                        hpi_ctl.control_type,
                                        hpi_ctl.src_node_type,
                                        hpi_ctl.src_node_index,
                                        hpi_ctl.dst_node_type,
                                        hpi_ctl.dst_node_index);
                        continue;
                }
                if (err < 0)
                        return err;
        }
        if (HPI_ERROR_INVALID_OBJ_INDEX != err)
                hpi_handle_error(err);

        dev_info(&asihpi->pci->dev, "%d mixer controls found\n", idx);

        return 0;
}

/*------------------------------------------------------------
   /proc interface
 ------------------------------------------------------------*/

static void
snd_asihpi_proc_read(struct snd_info_entry *entry,
                        struct snd_info_buffer *buffer)
{
        struct snd_card_asihpi *asihpi = entry->private_data;
        u32 h_control;
        u32 rate = 0;
        u16 source = 0;

        u16 num_outstreams;
        u16 num_instreams;
        u16 version;
        u32 serial_number;
        u16 type;

        int err;

        snd_iprintf(buffer, "ASIHPI driver proc file\n");

        hpi_handle_error(hpi_adapter_get_info(asihpi->hpi->adapter->index,
                        &num_outstreams, &num_instreams,
                        &version, &serial_number, &type));

        snd_iprintf(buffer,
                        "Adapter type ASI%4X\nHardware Index %d\n"
                        "%d outstreams\n%d instreams\n",
                        type, asihpi->hpi->adapter->index,
                        num_outstreams, num_instreams);

        snd_iprintf(buffer,
                "Serial#%d\nHardware version %c%d\nDSP code version %03d\n",
                serial_number, ((version >> 3) & 0xf) + 'A', version & 0x7,
                ((version >> 13) * 100) + ((version >> 7) & 0x3f));

        err = hpi_mixer_get_control(asihpi->h_mixer,
                                  HPI_SOURCENODE_CLOCK_SOURCE, 0, 0, 0,
                                  HPI_CONTROL_SAMPLECLOCK, &h_control);

        if (!err) {
                err = hpi_sample_clock_get_sample_rate(h_control, &rate);
                err += hpi_sample_clock_get_source(h_control, &source);

                if (!err)
                        snd_iprintf(buffer, "Sample Clock %dHz, source %s\n",
                        rate, sampleclock_sources[source]);
        }
}

static void snd_asihpi_proc_init(struct snd_card_asihpi *asihpi)
{
        snd_card_ro_proc_new(asihpi->card, "info", asihpi,
                             snd_asihpi_proc_read);
}

/*------------------------------------------------------------
   HWDEP
 ------------------------------------------------------------*/

static int snd_asihpi_hpi_open(struct snd_hwdep *hw, struct file *file)
{
        if (enable_hpi_hwdep)
                return 0;
        else
                return -ENODEV;

}

static int snd_asihpi_hpi_release(struct snd_hwdep *hw, struct file *file)
{
        if (enable_hpi_hwdep)
                return asihpi_hpi_release(file);
        else
                return -ENODEV;
}

static int snd_asihpi_hpi_ioctl(struct snd_hwdep *hw, struct file *file,
                                unsigned int cmd, unsigned long arg)
{
        if (enable_hpi_hwdep)
                return asihpi_hpi_ioctl(file, cmd, arg);
        else
                return -ENODEV;
}


/* results in /dev/snd/hwC#D0 file for each card with index #
   also /proc/asound/hwdep will contain '#-00: asihpi (HPI) for each card'
*/
static int snd_asihpi_hpi_new(struct snd_card_asihpi *asihpi, int device)
{
        struct snd_hwdep *hw;
        int err;

        err = snd_hwdep_new(asihpi->card, "HPI", device, &hw);
        if (err < 0)
                return err;
        strcpy(hw->name, "asihpi (HPI)");
        hw->iface = SNDRV_HWDEP_IFACE_LAST;
        hw->ops.open = snd_asihpi_hpi_open;
        hw->ops.ioctl = snd_asihpi_hpi_ioctl;
        hw->ops.release = snd_asihpi_hpi_release;
        hw->private_data = asihpi;
        return 0;
}

/*------------------------------------------------------------
   CARD
 ------------------------------------------------------------*/
static int snd_asihpi_probe(struct pci_dev *pci_dev,
                            const struct pci_device_id *pci_id)
{
        int err;
        struct hpi_adapter *hpi;
        struct snd_card *card;
        struct snd_card_asihpi *asihpi;

        u32 h_control;
        u32 h_stream;
        u32 adapter_index;

        static int dev;
        if (dev >= SNDRV_CARDS)
                return -ENODEV;

        /* Should this be enable[hpi->index] ? */
        if (!enable[dev]) {
                dev++;
                return -ENOENT;
        }

        /* Initialise low-level HPI driver */
        err = asihpi_adapter_probe(pci_dev, pci_id);
        if (err < 0)
                return err;

        hpi = pci_get_drvdata(pci_dev);
        adapter_index = hpi->adapter->index;
        /* first try to give the card the same index as its hardware index */
        err = snd_card_new(&pci_dev->dev, adapter_index, id[adapter_index],
                           THIS_MODULE, sizeof(struct snd_card_asihpi), &card);
        if (err < 0) {
                /* if that fails, try the default index==next available */
                err = snd_card_new(&pci_dev->dev, index[dev], id[dev],
                                   THIS_MODULE, sizeof(struct snd_card_asihpi),
                                   &card);
                if (err < 0)
                        return err;
                dev_warn(&pci_dev->dev, "Adapter index %d->ALSA index %d\n",
                        adapter_index, card->number);
        }

        asihpi = card->private_data;
        asihpi->card = card;
        asihpi->pci = pci_dev;
        asihpi->hpi = hpi;
        hpi->snd_card = card;

        err = hpi_adapter_get_property(adapter_index,
                HPI_ADAPTER_PROPERTY_CAPS1,
                NULL, &asihpi->support_grouping);
        if (err)
                asihpi->support_grouping = 0;

        err = hpi_adapter_get_property(adapter_index,
                HPI_ADAPTER_PROPERTY_CAPS2,
                &asihpi->support_mrx, NULL);
        if (err)
                asihpi->support_mrx = 0;

        err = hpi_adapter_get_property(adapter_index,
                HPI_ADAPTER_PROPERTY_INTERVAL,
                NULL, &asihpi->update_interval_frames);
        if (err)
                asihpi->update_interval_frames = 512;

        if (hpi->interrupt_mode) {
                asihpi->pcm_start = snd_card_asihpi_pcm_int_start;
                asihpi->pcm_stop = snd_card_asihpi_pcm_int_stop;
                tasklet_init(&asihpi->t, snd_card_asihpi_int_task,
                        (unsigned long)hpi);
                hpi->interrupt_callback = snd_card_asihpi_isr;
        } else {
                asihpi->pcm_start = snd_card_asihpi_pcm_timer_start;
                asihpi->pcm_stop = snd_card_asihpi_pcm_timer_stop;
        }

        hpi_handle_error(hpi_instream_open(adapter_index,
                             0, &h_stream));

        err = hpi_instream_host_buffer_free(h_stream);
        asihpi->can_dma = (!err);

        hpi_handle_error(hpi_instream_close(h_stream));

        if (!asihpi->can_dma)
                asihpi->update_interval_frames *= 2;

        err = hpi_adapter_get_property(adapter_index,
                HPI_ADAPTER_PROPERTY_CURCHANNELS,
                &asihpi->in_max_chans, &asihpi->out_max_chans);
        if (err) {
                asihpi->in_max_chans = 2;
                asihpi->out_max_chans = 2;
        }

        if (asihpi->out_max_chans > 2) { /* assume LL mode */
                asihpi->out_min_chans = asihpi->out_max_chans;
                asihpi->in_min_chans = asihpi->in_max_chans;
                asihpi->support_grouping = 0;
        } else {
                asihpi->out_min_chans = 1;
                asihpi->in_min_chans = 1;
        }

        dev_info(&pci_dev->dev, "Has dma:%d, grouping:%d, mrx:%d, uif:%d\n",
                        asihpi->can_dma,
                        asihpi->support_grouping,
                        asihpi->support_mrx,
                        asihpi->update_interval_frames
              );

        err = snd_card_asihpi_pcm_new(asihpi, 0);
        if (err < 0) {
                dev_err(&pci_dev->dev, "pcm_new failed\n");
                goto __nodev;
        }
        err = snd_card_asihpi_mixer_new(asihpi);
        if (err < 0) {
                dev_err(&pci_dev->dev, "mixer_new failed\n");
                goto __nodev;
        }

        err = hpi_mixer_get_control(asihpi->h_mixer,
                                  HPI_SOURCENODE_CLOCK_SOURCE, 0, 0, 0,
                                  HPI_CONTROL_SAMPLECLOCK, &h_control);

        if (!err)
                err = hpi_sample_clock_set_local_rate(
                        h_control, adapter_fs);

        snd_asihpi_proc_init(asihpi);

        /* always create, can be enabled or disabled dynamically
            by enable_hwdep  module param*/
        snd_asihpi_hpi_new(asihpi, 0);

        strcpy(card->driver, "ASIHPI");

        sprintf(card->shortname, "AudioScience ASI%4X",
                        asihpi->hpi->adapter->type);
        sprintf(card->longname, "%s %i",
                        card->shortname, adapter_index);
        err = snd_card_register(card);

        if (!err) {
                dev++;
                return 0;
        }
__nodev:
        snd_card_free(card);
        dev_err(&pci_dev->dev, "snd_asihpi_probe error %d\n", err);
        return err;

}

static void snd_asihpi_remove(struct pci_dev *pci_dev)
{
        struct hpi_adapter *hpi = pci_get_drvdata(pci_dev);
        struct snd_card_asihpi *asihpi = hpi->snd_card->private_data;

        /* Stop interrupts */
        if (hpi->interrupt_mode) {
                hpi->interrupt_callback = NULL;
                hpi_handle_error(hpi_adapter_set_property(hpi->adapter->index,
                        HPI_ADAPTER_PROPERTY_IRQ_RATE, 0, 0));
                tasklet_kill(&asihpi->t);
        }

        snd_card_free(hpi->snd_card);
        hpi->snd_card = NULL;
        asihpi_adapter_remove(pci_dev);
}

static const struct pci_device_id asihpi_pci_tbl[] = {
        {HPI_PCI_VENDOR_ID_TI, HPI_PCI_DEV_ID_DSP6205,
                HPI_PCI_VENDOR_ID_AUDIOSCIENCE, PCI_ANY_ID, 0, 0,
                (kernel_ulong_t)HPI_6205},
        {HPI_PCI_VENDOR_ID_TI, HPI_PCI_DEV_ID_PCI2040,
                HPI_PCI_VENDOR_ID_AUDIOSCIENCE, PCI_ANY_ID, 0, 0,
                (kernel_ulong_t)HPI_6000},
        {0,}
};
MODULE_DEVICE_TABLE(pci, asihpi_pci_tbl);

static struct pci_driver driver = {
        .name = KBUILD_MODNAME,
        .id_table = asihpi_pci_tbl,
        .probe = snd_asihpi_probe,
        .remove = snd_asihpi_remove,
};

static int __init snd_asihpi_init(void)
{