Archipelago » qemu

/*

 * QEMU ES1370 emulation

 *

 * Copyright (c) 2005 Vassili Karpov (malc)

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

/* #define DEBUG_ES1370 */

/* #define VERBOSE_ES1370 */

#define SILENT_ES1370

#include "hw.h"

#include "audiodev.h"

#include "audio/audio.h"

#include "pci.h"

#include "dma.h"

/* Missing stuff:

   SCTRL_P[12](END|ST)INC

   SCTRL_P1SCTRLD

   SCTRL_P2DACSEN

   CTRL_DAC_SYNC

   MIDI

   non looped mode

   surely more

*/

/*

  Following macros and samplerate array were copied verbatim from

  Linux kernel 2.4.30: drivers/sound/es1370.c

  Copyright (C) 1998-2001, 2003 Thomas Sailer (t.sailer@alumni.ethz.ch)

*/

/* Start blatant GPL violation */

#define ES1370_REG_CONTROL        0x00

#define ES1370_REG_STATUS         0x04

#define ES1370_REG_UART_DATA      0x08

#define ES1370_REG_UART_STATUS    0x09

#define ES1370_REG_UART_CONTROL   0x09

#define ES1370_REG_UART_TEST      0x0a

#define ES1370_REG_MEMPAGE        0x0c

#define ES1370_REG_CODEC          0x10

#define ES1370_REG_SERIAL_CONTROL 0x20

#define ES1370_REG_DAC1_SCOUNT    0x24

#define ES1370_REG_DAC2_SCOUNT    0x28

#define ES1370_REG_ADC_SCOUNT     0x2c

#define ES1370_REG_DAC1_FRAMEADR    0xc30

#define ES1370_REG_DAC1_FRAMECNT    0xc34

#define ES1370_REG_DAC2_FRAMEADR    0xc38

#define ES1370_REG_DAC2_FRAMECNT    0xc3c

#define ES1370_REG_ADC_FRAMEADR     0xd30

#define ES1370_REG_ADC_FRAMECNT     0xd34

#define ES1370_REG_PHANTOM_FRAMEADR 0xd38

#define ES1370_REG_PHANTOM_FRAMECNT 0xd3c

static const unsigned dac1_samplerate[] = { 5512, 11025, 22050, 44100 };

#define DAC2_SRTODIV(x) (((1411200+(x)/2)/(x))-2)

#define DAC2_DIVTOSR(x) (1411200/((x)+2))

#define CTRL_ADC_STOP   0x80000000  /* 1 = ADC stopped */

#define CTRL_XCTL1      0x40000000  /* electret mic bias */

#define CTRL_OPEN       0x20000000  /* no function, can be read and written */

#define CTRL_PCLKDIV    0x1fff0000  /* ADC/DAC2 clock divider */

#define CTRL_SH_PCLKDIV 16

#define CTRL_MSFMTSEL   0x00008000  /* MPEG serial data fmt: 0 = Sony, 1 = I2S */

#define CTRL_M_SBB      0x00004000  /* DAC2 clock: 0 = PCLKDIV, 1 = MPEG */

#define CTRL_WTSRSEL    0x00003000  /* DAC1 clock freq: 0=5512, 1=11025, 2=22050, 3=44100 */

#define CTRL_SH_WTSRSEL 12

#define CTRL_DAC_SYNC   0x00000800  /* 1 = DAC2 runs off DAC1 clock */

#define CTRL_CCB_INTRM  0x00000400  /* 1 = CCB "voice" ints enabled */

#define CTRL_M_CB       0x00000200  /* recording source: 0 = ADC, 1 = MPEG */

#define CTRL_XCTL0      0x00000100  /* 0 = Line in, 1 = Line out */

#define CTRL_BREQ       0x00000080  /* 1 = test mode (internal mem test) */

#define CTRL_DAC1_EN    0x00000040  /* enable DAC1 */

#define CTRL_DAC2_EN    0x00000020  /* enable DAC2 */

#define CTRL_ADC_EN     0x00000010  /* enable ADC */

#define CTRL_UART_EN    0x00000008  /* enable MIDI uart */

#define CTRL_JYSTK_EN   0x00000004  /* enable Joystick port (presumably at address 0x200) */

#define CTRL_CDC_EN     0x00000002  /* enable serial (CODEC) interface */

#define CTRL_SERR_DIS   0x00000001  /* 1 = disable PCI SERR signal */

#define STAT_INTR       0x80000000  /* wired or of all interrupt bits */

#define STAT_CSTAT      0x00000400  /* 1 = codec busy or codec write in progress */

#define STAT_CBUSY      0x00000200  /* 1 = codec busy */

#define STAT_CWRIP      0x00000100  /* 1 = codec write in progress */

#define STAT_VC         0x00000060  /* CCB int source, 0=DAC1, 1=DAC2, 2=ADC, 3=undef */

#define STAT_SH_VC      5

#define STAT_MCCB       0x00000010  /* CCB int pending */

#define STAT_UART       0x00000008  /* UART int pending */

#define STAT_DAC1       0x00000004  /* DAC1 int pending */

#define STAT_DAC2       0x00000002  /* DAC2 int pending */

#define STAT_ADC        0x00000001  /* ADC int pending */

#define USTAT_RXINT     0x80        /* UART rx int pending */

#define USTAT_TXINT     0x04        /* UART tx int pending */

#define USTAT_TXRDY     0x02        /* UART tx ready */

#define USTAT_RXRDY     0x01        /* UART rx ready */

#define UCTRL_RXINTEN   0x80        /* 1 = enable RX ints */

#define UCTRL_TXINTEN   0x60        /* TX int enable field mask */

#define UCTRL_ENA_TXINT 0x20        /* enable TX int */

#define UCTRL_CNTRL     0x03        /* control field */

#define UCTRL_CNTRL_SWR 0x03        /* software reset command */

#define SCTRL_P2ENDINC    0x00380000  /*  */

#define SCTRL_SH_P2ENDINC 19

#define SCTRL_P2STINC     0x00070000  /*  */

#define SCTRL_SH_P2STINC  16

#define SCTRL_R1LOOPSEL   0x00008000  /* 0 = loop mode */

#define SCTRL_P2LOOPSEL   0x00004000  /* 0 = loop mode */

#define SCTRL_P1LOOPSEL   0x00002000  /* 0 = loop mode */

#define SCTRL_P2PAUSE     0x00001000  /* 1 = pause mode */

#define SCTRL_P1PAUSE     0x00000800  /* 1 = pause mode */

#define SCTRL_R1INTEN     0x00000400  /* enable interrupt */

#define SCTRL_P2INTEN     0x00000200  /* enable interrupt */

#define SCTRL_P1INTEN     0x00000100  /* enable interrupt */

#define SCTRL_P1SCTRLD    0x00000080  /* reload sample count register for DAC1 */

#define SCTRL_P2DACSEN    0x00000040  /* 1 = DAC2 play back last sample when disabled */

#define SCTRL_R1SEB       0x00000020  /* 1 = 16bit */

#define SCTRL_R1SMB       0x00000010  /* 1 = stereo */

#define SCTRL_R1FMT       0x00000030  /* format mask */

#define SCTRL_SH_R1FMT    4

#define SCTRL_P2SEB       0x00000008  /* 1 = 16bit */

#define SCTRL_P2SMB       0x00000004  /* 1 = stereo */

#define SCTRL_P2FMT       0x0000000c  /* format mask */

#define SCTRL_SH_P2FMT    2

#define SCTRL_P1SEB       0x00000002  /* 1 = 16bit */

#define SCTRL_P1SMB       0x00000001  /* 1 = stereo */

#define SCTRL_P1FMT       0x00000003  /* format mask */

#define SCTRL_SH_P1FMT    0

/* End blatant GPL violation */

#define NB_CHANNELS 3

#define DAC1_CHANNEL 0

#define DAC2_CHANNEL 1

#define ADC_CHANNEL 2

#define IO_READ_PROTO(n) \

static uint32_t n (void *opaque, uint32_t addr)

#define IO_WRITE_PROTO(n) \

static void n (void *opaque, uint32_t addr, uint32_t val)

static void es1370_dac1_callback (void *opaque, int free);

static void es1370_dac2_callback (void *opaque, int free);

static void es1370_adc_callback (void *opaque, int avail);

#ifdef DEBUG_ES1370

#define ldebug(...) AUD_log ("es1370", __VA_ARGS__)

static void print_ctl (uint32_t val)

{

    char buf[1024];

    buf[0] = '\0';

#define a(n) if (val & CTRL_##n) strcat (buf, " "#n)

    a (ADC_STOP);

    a (XCTL1);

    a (OPEN);

    a (MSFMTSEL);

    a (M_SBB);

    a (DAC_SYNC);

    a (CCB_INTRM);

    a (M_CB);

    a (XCTL0);

    a (BREQ);

    a (DAC1_EN);

    a (DAC2_EN);

    a (ADC_EN);

    a (UART_EN);

    a (JYSTK_EN);

    a (CDC_EN);

    a (SERR_DIS);

#undef a

    AUD_log ("es1370", "ctl - PCLKDIV %d(DAC2 freq %d), freq %d,%s\n",

             (val & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV,

             DAC2_DIVTOSR ((val & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV),

             dac1_samplerate[(val & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL],

             buf);

}

static void print_sctl (uint32_t val)

{

    static const char *fmt_names[] = {"8M", "8S", "16M", "16S"};

    char buf[1024];

    buf[0] = '\0';

#define a(n) if (val & SCTRL_##n) strcat (buf, " "#n)

#define b(n) if (!(val & SCTRL_##n)) strcat (buf, " "#n)

    b (R1LOOPSEL);

    b (P2LOOPSEL);

    b (P1LOOPSEL);

    a (P2PAUSE);

    a (P1PAUSE);

    a (R1INTEN);

    a (P2INTEN);

    a (P1INTEN);

    a (P1SCTRLD);

    a (P2DACSEN);

    if (buf[0]) {

        strcat (buf, "\n        ");

    }

    else {

        buf[0] = ' ';

        buf[1] = '\0';

    }

#undef b

#undef a

    AUD_log ("es1370",

             "%s"

             "p2_end_inc %d, p2_st_inc %d, r1_fmt %s, p2_fmt %s, p1_fmt %s\n",

             buf,

             (val & SCTRL_P2ENDINC) >> SCTRL_SH_P2ENDINC,

             (val & SCTRL_P2STINC) >> SCTRL_SH_P2STINC,

             fmt_names [(val >> SCTRL_SH_R1FMT) & 3],

             fmt_names [(val >> SCTRL_SH_P2FMT) & 3],

             fmt_names [(val >> SCTRL_SH_P1FMT) & 3]

        );

}

#else

#define ldebug(...)

#define print_ctl(...)

#define print_sctl(...)

#endif

#ifdef VERBOSE_ES1370

#define dolog(...) AUD_log ("es1370", __VA_ARGS__)

#else

#define dolog(...)

#endif

#ifndef SILENT_ES1370

#define lwarn(...) AUD_log ("es1370: warning", __VA_ARGS__)

#else

#define lwarn(...)

#endif

struct chan {

    uint32_t shift;

    uint32_t leftover;

    uint32_t scount;

    uint32_t frame_addr;

    uint32_t frame_cnt;

};

typedef struct ES1370State {

    PCIDevice dev;

    QEMUSoundCard card;

    MemoryRegion io;

    struct chan chan[NB_CHANNELS];

    SWVoiceOut *dac_voice[2];

    SWVoiceIn *adc_voice;

    uint32_t ctl;

    uint32_t status;

    uint32_t mempage;

    uint32_t codec;

    uint32_t sctl;

} ES1370State;

struct chan_bits {

    uint32_t ctl_en;

    uint32_t stat_int;

    uint32_t sctl_pause;

    uint32_t sctl_inten;

    uint32_t sctl_fmt;

    uint32_t sctl_sh_fmt;

    uint32_t sctl_loopsel;

    void (*calc_freq) (ES1370State *s, uint32_t ctl,

                       uint32_t *old_freq, uint32_t *new_freq);

};

static void es1370_dac1_calc_freq (ES1370State *s, uint32_t ctl,

                                   uint32_t *old_freq, uint32_t *new_freq);

static void es1370_dac2_and_adc_calc_freq (ES1370State *s, uint32_t ctl,

                                           uint32_t *old_freq,

                                           uint32_t *new_freq);

static const struct chan_bits es1370_chan_bits[] = {

    {CTRL_DAC1_EN, STAT_DAC1, SCTRL_P1PAUSE, SCTRL_P1INTEN,

     SCTRL_P1FMT, SCTRL_SH_P1FMT, SCTRL_P1LOOPSEL,

     es1370_dac1_calc_freq},

    {CTRL_DAC2_EN, STAT_DAC2, SCTRL_P2PAUSE, SCTRL_P2INTEN,

     SCTRL_P2FMT, SCTRL_SH_P2FMT, SCTRL_P2LOOPSEL,

     es1370_dac2_and_adc_calc_freq},

    {CTRL_ADC_EN, STAT_ADC, 0, SCTRL_R1INTEN,

     SCTRL_R1FMT, SCTRL_SH_R1FMT, SCTRL_R1LOOPSEL,

     es1370_dac2_and_adc_calc_freq}

};

static void es1370_update_status (ES1370State *s, uint32_t new_status)

{

    uint32_t level = new_status & (STAT_DAC1 | STAT_DAC2 | STAT_ADC);

    if (level) {

        s->status = new_status | STAT_INTR;

    }

    else {

        s->status = new_status & ~STAT_INTR;

    }

    qemu_set_irq (s->dev.irq[0], !!level);

}

static void es1370_reset (ES1370State *s)

{

    size_t i;

    s->ctl = 1;

    s->status = 0x60;

    s->mempage = 0;

    s->codec = 0;

    s->sctl = 0;

    for (i = 0; i < NB_CHANNELS; ++i) {

        struct chan *d = &s->chan[i];

        d->scount = 0;

        d->leftover = 0;

        if (i == ADC_CHANNEL) {

            AUD_close_in (&s->card, s->adc_voice);

            s->adc_voice = NULL;

        }

        else {

            AUD_close_out (&s->card, s->dac_voice[i]);

            s->dac_voice[i] = NULL;

        }

    }

    qemu_irq_lower (s->dev.irq[0]);

}

static void es1370_maybe_lower_irq (ES1370State *s, uint32_t sctl)

{

    uint32_t new_status = s->status;

    if (!(sctl & SCTRL_P1INTEN) && (s->sctl & SCTRL_P1INTEN)) {

        new_status &= ~STAT_DAC1;

    }

    if (!(sctl & SCTRL_P2INTEN) && (s->sctl & SCTRL_P2INTEN)) {

        new_status &= ~STAT_DAC2;

    }

    if (!(sctl & SCTRL_R1INTEN) && (s->sctl & SCTRL_R1INTEN)) {

        new_status &= ~STAT_ADC;

    }

    if (new_status != s->status) {

        es1370_update_status (s, new_status);

    }

}

static void es1370_dac1_calc_freq (ES1370State *s, uint32_t ctl,

                                   uint32_t *old_freq, uint32_t *new_freq)

{

    *old_freq = dac1_samplerate[(s->ctl & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL];

    *new_freq = dac1_samplerate[(ctl & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL];

}

static void es1370_dac2_and_adc_calc_freq (ES1370State *s, uint32_t ctl,

                                           uint32_t *old_freq,

                                           uint32_t *new_freq)

{

    uint32_t old_pclkdiv, new_pclkdiv;

    new_pclkdiv = (ctl & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV;

    old_pclkdiv = (s->ctl & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV;

    *new_freq = DAC2_DIVTOSR (new_pclkdiv);

    *old_freq = DAC2_DIVTOSR (old_pclkdiv);

}

static void es1370_update_voices (ES1370State *s, uint32_t ctl, uint32_t sctl)

{

    size_t i;

    uint32_t old_freq, new_freq, old_fmt, new_fmt;

    for (i = 0; i < NB_CHANNELS; ++i) {

        struct chan *d = &s->chan[i];

        const struct chan_bits *b = &es1370_chan_bits[i];

        new_fmt = (sctl & b->sctl_fmt) >> b->sctl_sh_fmt;

        old_fmt = (s->sctl & b->sctl_fmt) >> b->sctl_sh_fmt;

        b->calc_freq (s, ctl, &old_freq, &new_freq);

        if ((old_fmt != new_fmt) || (old_freq != new_freq)) {

            d->shift = (new_fmt & 1) + (new_fmt >> 1);

            ldebug ("channel %d, freq = %d, nchannels %d, fmt %d, shift %d\n",

                    i,

                    new_freq,

                    1 << (new_fmt & 1),

                    (new_fmt & 2) ? AUD_FMT_S16 : AUD_FMT_U8,

                    d->shift);

            if (new_freq) {

                struct audsettings as;

                as.freq = new_freq;

                as.nchannels = 1 << (new_fmt & 1);

                as.fmt = (new_fmt & 2) ? AUD_FMT_S16 : AUD_FMT_U8;

                as.endianness = 0;

                if (i == ADC_CHANNEL) {

                    s->adc_voice =

                        AUD_open_in (

                            &s->card,

                            s->adc_voice,

                            "es1370.adc",

                            s,

                            es1370_adc_callback,

                            &as

                            );

                }

                else {

                    s->dac_voice[i] =

                        AUD_open_out (

                            &s->card,

                            s->dac_voice[i],

                            i ? "es1370.dac2" : "es1370.dac1",

                            s,

                            i ? es1370_dac2_callback : es1370_dac1_callback,

                            &as

                            );

                }

            }

        }

        if (((ctl ^ s->ctl) & b->ctl_en)

            || ((sctl ^ s->sctl) & b->sctl_pause)) {

            int on = (ctl & b->ctl_en) && !(sctl & b->sctl_pause);

            if (i == ADC_CHANNEL) {

                AUD_set_active_in (s->adc_voice, on);

            }

            else {

                AUD_set_active_out (s->dac_voice[i], on);

            }

        }

    }

    s->ctl = ctl;

    s->sctl = sctl;

}

static inline uint32_t es1370_fixup (ES1370State *s, uint32_t addr)

{

    addr &= 0xff;

    if (addr >= 0x30 && addr <= 0x3f)

        addr |= s->mempage << 8;

    return addr;

}

IO_WRITE_PROTO (es1370_writeb)

{

    ES1370State *s = opaque;

    uint32_t shift, mask;

    addr = es1370_fixup (s, addr);

    switch (addr) {

    case ES1370_REG_CONTROL:

    case ES1370_REG_CONTROL + 1:

    case ES1370_REG_CONTROL + 2:

    case ES1370_REG_CONTROL + 3:

        shift = (addr - ES1370_REG_CONTROL) << 3;

        mask = 0xff << shift;

        val = (s->ctl & ~mask) | ((val & 0xff) << shift);

        es1370_update_voices (s, val, s->sctl);

        print_ctl (val);

        break;

    case ES1370_REG_MEMPAGE:

        s->mempage = val;

        break;

    case ES1370_REG_SERIAL_CONTROL:

    case ES1370_REG_SERIAL_CONTROL + 1:

    case ES1370_REG_SERIAL_CONTROL + 2:

    case ES1370_REG_SERIAL_CONTROL + 3:

        shift = (addr - ES1370_REG_SERIAL_CONTROL) << 3;

        mask = 0xff << shift;

        val = (s->sctl & ~mask) | ((val & 0xff) << shift);

        es1370_maybe_lower_irq (s, val);

        es1370_update_voices (s, s->ctl, val);

        print_sctl (val);

        break;

    default:

        lwarn ("writeb %#x <- %#x\n", addr, val);

        break;

    }

}

IO_WRITE_PROTO (es1370_writew)

{

    ES1370State *s = opaque;

    addr = es1370_fixup (s, addr);

    uint32_t shift, mask;

    struct chan *d = &s->chan[0];

    switch (addr) {

    case ES1370_REG_CODEC:

        dolog ("ignored codec write address %#x, data %#x\n",

               (val >> 8) & 0xff, val & 0xff);

        s->codec = val;

        break;

    case ES1370_REG_CONTROL:

    case ES1370_REG_CONTROL + 2:

        shift = (addr != ES1370_REG_CONTROL) << 4;

        mask = 0xffff << shift;

        val = (s->ctl & ~mask) | ((val & 0xffff) << shift);

        es1370_update_voices (s, val, s->sctl);

        print_ctl (val);

        break;

    case ES1370_REG_ADC_SCOUNT:

        d++;

    case ES1370_REG_DAC2_SCOUNT:

        d++;

    case ES1370_REG_DAC1_SCOUNT:

        d->scount = (d->scount & ~0xffff) | (val & 0xffff);

        break;

    default:

        lwarn ("writew %#x <- %#x\n", addr, val);

        break;

    }

}

IO_WRITE_PROTO (es1370_writel)

{

    ES1370State *s = opaque;

    struct chan *d = &s->chan[0];

    addr = es1370_fixup (s, addr);

    switch (addr) {

    case ES1370_REG_CONTROL:

        es1370_update_voices (s, val, s->sctl);

        print_ctl (val);

        break;

    case ES1370_REG_MEMPAGE:

        s->mempage = val & 0xf;

        break;

    case ES1370_REG_SERIAL_CONTROL:

        es1370_maybe_lower_irq (s, val);

        es1370_update_voices (s, s->ctl, val);

        print_sctl (val);

        break;

    case ES1370_REG_ADC_SCOUNT:

        d++;

    case ES1370_REG_DAC2_SCOUNT:

        d++;

    case ES1370_REG_DAC1_SCOUNT:

        d->scount = (val & 0xffff) | (d->scount & ~0xffff);

        ldebug ("chan %d CURR_SAMP_CT %d, SAMP_CT %d\n",

                d - &s->chan[0], val >> 16, (val & 0xffff));

        break;

    case ES1370_REG_ADC_FRAMEADR:

        d++;

    case ES1370_REG_DAC2_FRAMEADR:

        d++;

    case ES1370_REG_DAC1_FRAMEADR:

        d->frame_addr = val;

        ldebug ("chan %d frame address %#x\n", d - &s->chan[0], val);

        break;

    case ES1370_REG_PHANTOM_FRAMECNT:

        lwarn ("writing to phantom frame count %#x\n", val);

        break;

    case ES1370_REG_PHANTOM_FRAMEADR:

        lwarn ("writing to phantom frame address %#x\n", val);

        break;

    case ES1370_REG_ADC_FRAMECNT:

        d++;

    case ES1370_REG_DAC2_FRAMECNT:

        d++;

    case ES1370_REG_DAC1_FRAMECNT:

        d->frame_cnt = val;

        d->leftover = 0;

        ldebug ("chan %d frame count %d, buffer size %d\n",

                d - &s->chan[0], val >> 16, val & 0xffff);

        break;

    default:

        lwarn ("writel %#x <- %#x\n", addr, val);

        break;

    }

}

IO_READ_PROTO (es1370_readb)

{

    ES1370State *s = opaque;

    uint32_t val;

    addr = es1370_fixup (s, addr);

    switch (addr) {

    case 0x1b:                  /* Legacy */

        lwarn ("Attempt to read from legacy register\n");

        val = 5;

        break;

    case ES1370_REG_MEMPAGE:

        val = s->mempage;

        break;

    case ES1370_REG_CONTROL + 0:

    case ES1370_REG_CONTROL + 1:

    case ES1370_REG_CONTROL + 2:

    case ES1370_REG_CONTROL + 3:

        val = s->ctl >> ((addr - ES1370_REG_CONTROL) << 3);

        break;

    case ES1370_REG_STATUS + 0:

    case ES1370_REG_STATUS + 1:

    case ES1370_REG_STATUS + 2:

    case ES1370_REG_STATUS + 3:

        val = s->status >> ((addr - ES1370_REG_STATUS) << 3);

        break;

    default:

        val = ~0;

        lwarn ("readb %#x -> %#x\n", addr, val);

        break;

    }

    return val;

}

IO_READ_PROTO (es1370_readw)

{

    ES1370State *s = opaque;

    struct chan *d = &s->chan[0];

    uint32_t val;

    addr = es1370_fixup (s, addr);

    switch (addr) {

    case ES1370_REG_ADC_SCOUNT + 2:

        d++;

    case ES1370_REG_DAC2_SCOUNT + 2:

        d++;

    case ES1370_REG_DAC1_SCOUNT + 2:

        val = d->scount >> 16;

        break;

    case ES1370_REG_ADC_FRAMECNT:

        d++;

    case ES1370_REG_DAC2_FRAMECNT:

        d++;

    case ES1370_REG_DAC1_FRAMECNT:

        val = d->frame_cnt & 0xffff;

        break;

    case ES1370_REG_ADC_FRAMECNT + 2:

        d++;

    case ES1370_REG_DAC2_FRAMECNT + 2:

        d++;

    case ES1370_REG_DAC1_FRAMECNT + 2:

        val = d->frame_cnt >> 16;

        break;

    default:

        val = ~0;

        lwarn ("readw %#x -> %#x\n", addr, val);

        break;

    }

    return val;

}

IO_READ_PROTO (es1370_readl)

{

    ES1370State *s = opaque;

    uint32_t val;

    struct chan *d = &s->chan[0];

    addr = es1370_fixup (s, addr);

    switch (addr) {

    case ES1370_REG_CONTROL:

        val = s->ctl;

        break;

    case ES1370_REG_STATUS:

        val = s->status;

        break;

    case ES1370_REG_MEMPAGE:

        val = s->mempage;

        break;

    case ES1370_REG_CODEC:

        val = s->codec;

        break;

    case ES1370_REG_SERIAL_CONTROL:

        val = s->sctl;

        break;

    case ES1370_REG_ADC_SCOUNT:

        d++;

    case ES1370_REG_DAC2_SCOUNT:

        d++;

    case ES1370_REG_DAC1_SCOUNT:

        val = d->scount;

#ifdef DEBUG_ES1370

        {

            uint32_t curr_count = d->scount >> 16;

            uint32_t count = d->scount & 0xffff;

            curr_count <<= d->shift;

            count <<= d->shift;

            dolog ("read scount curr %d, total %d\n", curr_count, count);

        }

#endif

        break;

    case ES1370_REG_ADC_FRAMECNT:

        d++;

    case ES1370_REG_DAC2_FRAMECNT:

        d++;

    case ES1370_REG_DAC1_FRAMECNT:

        val = d->frame_cnt;

#ifdef DEBUG_ES1370

        {

            uint32_t size = ((d->frame_cnt & 0xffff) + 1) << 2;

            uint32_t curr = ((d->frame_cnt >> 16) + 1) << 2;

            if (curr > size)

                dolog ("read framecnt curr %d, size %d %d\n", curr, size,

                       curr > size);

        }

#endif

        break;

    case ES1370_REG_ADC_FRAMEADR:

        d++;

    case ES1370_REG_DAC2_FRAMEADR:

        d++;

    case ES1370_REG_DAC1_FRAMEADR:

        val = d->frame_addr;

        break;

    case ES1370_REG_PHANTOM_FRAMECNT:

        val = ~0U;

        lwarn ("reading from phantom frame count\n");

        break;

    case ES1370_REG_PHANTOM_FRAMEADR:

        val = ~0U;

        lwarn ("reading from phantom frame address\n");

        break;

    default:

        val = ~0U;

        lwarn ("readl %#x -> %#x\n", addr, val);

        break;

    }

    return val;

}

static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel,

                                   int max, int *irq)

{

    uint8_t tmpbuf[4096];

    uint32_t addr = d->frame_addr;

    int sc = d->scount & 0xffff;

    int csc = d->scount >> 16;

    int csc_bytes = (csc + 1) << d->shift;

    int cnt = d->frame_cnt >> 16;

    int size = d->frame_cnt & 0xffff;

    int left = ((size - cnt + 1) << 2) + d->leftover;

    int transferred = 0;

    int temp = audio_MIN (max, audio_MIN (left, csc_bytes));

    int index = d - &s->chan[0];

    addr += (cnt << 2) + d->leftover;

    if (index == ADC_CHANNEL) {

        while (temp) {

            int acquired, to_copy;

            to_copy = audio_MIN ((size_t) temp, sizeof (tmpbuf));

            acquired = AUD_read (s->adc_voice, tmpbuf, to_copy);

            if (!acquired)

                break;

            pci_dma_write (&s->dev, addr, tmpbuf, acquired);

            temp -= acquired;

            addr += acquired;

            transferred += acquired;

        }

    }

    else {

        SWVoiceOut *voice = s->dac_voice[index];

        while (temp) {

            int copied, to_copy;

            to_copy = audio_MIN ((size_t) temp, sizeof (tmpbuf));

            pci_dma_read (&s->dev, addr, tmpbuf, to_copy);

            copied = AUD_write (voice, tmpbuf, to_copy);

            if (!copied)

                break;

            temp -= copied;

            addr += copied;

            transferred += copied;

        }

    }

    if (csc_bytes == transferred) {

        *irq = 1;

        d->scount = sc | (sc << 16);

        ldebug ("sc = %d, rate = %f\n",

                (sc + 1) << d->shift,

                (sc + 1) / (double) 44100);

    }

    else {

        *irq = 0;

        d->scount = sc | (((csc_bytes - transferred - 1) >> d->shift) << 16);

    }

    cnt += (transferred + d->leftover) >> 2;

    if (s->sctl & loop_sel) {

        /* Bah, how stupid is that having a 0 represent true value?

           i just spent few hours on this shit */

        AUD_log ("es1370: warning", "non looping mode\n");

    }

    else {

        d->frame_cnt = size;

        if ((uint32_t) cnt <= d->frame_cnt)

            d->frame_cnt |= cnt << 16;

    }

    d->leftover = (transferred + d->leftover) & 3;

}

static void es1370_run_channel (ES1370State *s, size_t chan, int free_or_avail)

{

    uint32_t new_status = s->status;

    int max_bytes, irq;

    struct chan *d = &s->chan[chan];

    const struct chan_bits *b = &es1370_chan_bits[chan];

    if (!(s->ctl & b->ctl_en) || (s->sctl & b->sctl_pause)) {

        return;

    }

    max_bytes = free_or_avail;

    max_bytes &= ~((1 << d->shift) - 1);

    if (!max_bytes) {

        return;

    }

    es1370_transfer_audio (s, d, b->sctl_loopsel, max_bytes, &irq);