xref: /openbmc/qemu/hw/audio/es1370.c (revision 65a117da)
1 /*
2  * QEMU ES1370 emulation
3  *
4  * Copyright (c) 2005 Vassili Karpov (malc)
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 /* #define DEBUG_ES1370 */
26 /* #define VERBOSE_ES1370 */
27 #define SILENT_ES1370
28 
29 #include "qemu/osdep.h"
30 #include "hw/audio/soundhw.h"
31 #include "audio/audio.h"
32 #include "hw/pci/pci.h"
33 #include "migration/vmstate.h"
34 #include "qemu/module.h"
35 #include "sysemu/dma.h"
36 
37 /* Missing stuff:
38    SCTRL_P[12](END|ST)INC
39    SCTRL_P1SCTRLD
40    SCTRL_P2DACSEN
41    CTRL_DAC_SYNC
42    MIDI
43    non looped mode
44    surely more
45 */
46 
47 /*
48   Following macros and samplerate array were copied verbatim from
49   Linux kernel 2.4.30: drivers/sound/es1370.c
50 
51   Copyright (C) 1998-2001, 2003 Thomas Sailer (t.sailer@alumni.ethz.ch)
52 */
53 
54 /* Start blatant GPL violation */
55 
56 #define ES1370_REG_CONTROL        0x00
57 #define ES1370_REG_STATUS         0x04
58 #define ES1370_REG_UART_DATA      0x08
59 #define ES1370_REG_UART_STATUS    0x09
60 #define ES1370_REG_UART_CONTROL   0x09
61 #define ES1370_REG_UART_TEST      0x0a
62 #define ES1370_REG_MEMPAGE        0x0c
63 #define ES1370_REG_CODEC          0x10
64 #define ES1370_REG_SERIAL_CONTROL 0x20
65 #define ES1370_REG_DAC1_SCOUNT    0x24
66 #define ES1370_REG_DAC2_SCOUNT    0x28
67 #define ES1370_REG_ADC_SCOUNT     0x2c
68 
69 #define ES1370_REG_DAC1_FRAMEADR    0xc30
70 #define ES1370_REG_DAC1_FRAMECNT    0xc34
71 #define ES1370_REG_DAC2_FRAMEADR    0xc38
72 #define ES1370_REG_DAC2_FRAMECNT    0xc3c
73 #define ES1370_REG_ADC_FRAMEADR     0xd30
74 #define ES1370_REG_ADC_FRAMECNT     0xd34
75 #define ES1370_REG_PHANTOM_FRAMEADR 0xd38
76 #define ES1370_REG_PHANTOM_FRAMECNT 0xd3c
77 
78 static const unsigned dac1_samplerate[] = { 5512, 11025, 22050, 44100 };
79 
80 #define DAC2_SRTODIV(x) (((1411200+(x)/2)/(x))-2)
81 #define DAC2_DIVTOSR(x) (1411200/((x)+2))
82 
83 #define CTRL_ADC_STOP   0x80000000  /* 1 = ADC stopped */
84 #define CTRL_XCTL1      0x40000000  /* electret mic bias */
85 #define CTRL_OPEN       0x20000000  /* no function, can be read and written */
86 #define CTRL_PCLKDIV    0x1fff0000  /* ADC/DAC2 clock divider */
87 #define CTRL_SH_PCLKDIV 16
88 #define CTRL_MSFMTSEL   0x00008000  /* MPEG serial data fmt: 0 = Sony, 1 = I2S */
89 #define CTRL_M_SBB      0x00004000  /* DAC2 clock: 0 = PCLKDIV, 1 = MPEG */
90 #define CTRL_WTSRSEL    0x00003000  /* DAC1 clock freq: 0=5512, 1=11025, 2=22050, 3=44100 */
91 #define CTRL_SH_WTSRSEL 12
92 #define CTRL_DAC_SYNC   0x00000800  /* 1 = DAC2 runs off DAC1 clock */
93 #define CTRL_CCB_INTRM  0x00000400  /* 1 = CCB "voice" ints enabled */
94 #define CTRL_M_CB       0x00000200  /* recording source: 0 = ADC, 1 = MPEG */
95 #define CTRL_XCTL0      0x00000100  /* 0 = Line in, 1 = Line out */
96 #define CTRL_BREQ       0x00000080  /* 1 = test mode (internal mem test) */
97 #define CTRL_DAC1_EN    0x00000040  /* enable DAC1 */
98 #define CTRL_DAC2_EN    0x00000020  /* enable DAC2 */
99 #define CTRL_ADC_EN     0x00000010  /* enable ADC */
100 #define CTRL_UART_EN    0x00000008  /* enable MIDI uart */
101 #define CTRL_JYSTK_EN   0x00000004  /* enable Joystick port (presumably at address 0x200) */
102 #define CTRL_CDC_EN     0x00000002  /* enable serial (CODEC) interface */
103 #define CTRL_SERR_DIS   0x00000001  /* 1 = disable PCI SERR signal */
104 
105 #define STAT_INTR       0x80000000  /* wired or of all interrupt bits */
106 #define STAT_CSTAT      0x00000400  /* 1 = codec busy or codec write in progress */
107 #define STAT_CBUSY      0x00000200  /* 1 = codec busy */
108 #define STAT_CWRIP      0x00000100  /* 1 = codec write in progress */
109 #define STAT_VC         0x00000060  /* CCB int source, 0=DAC1, 1=DAC2, 2=ADC, 3=undef */
110 #define STAT_SH_VC      5
111 #define STAT_MCCB       0x00000010  /* CCB int pending */
112 #define STAT_UART       0x00000008  /* UART int pending */
113 #define STAT_DAC1       0x00000004  /* DAC1 int pending */
114 #define STAT_DAC2       0x00000002  /* DAC2 int pending */
115 #define STAT_ADC        0x00000001  /* ADC int pending */
116 
117 #define USTAT_RXINT     0x80        /* UART rx int pending */
118 #define USTAT_TXINT     0x04        /* UART tx int pending */
119 #define USTAT_TXRDY     0x02        /* UART tx ready */
120 #define USTAT_RXRDY     0x01        /* UART rx ready */
121 
122 #define UCTRL_RXINTEN   0x80        /* 1 = enable RX ints */
123 #define UCTRL_TXINTEN   0x60        /* TX int enable field mask */
124 #define UCTRL_ENA_TXINT 0x20        /* enable TX int */
125 #define UCTRL_CNTRL     0x03        /* control field */
126 #define UCTRL_CNTRL_SWR 0x03        /* software reset command */
127 
128 #define SCTRL_P2ENDINC    0x00380000  /*  */
129 #define SCTRL_SH_P2ENDINC 19
130 #define SCTRL_P2STINC     0x00070000  /*  */
131 #define SCTRL_SH_P2STINC  16
132 #define SCTRL_R1LOOPSEL   0x00008000  /* 0 = loop mode */
133 #define SCTRL_P2LOOPSEL   0x00004000  /* 0 = loop mode */
134 #define SCTRL_P1LOOPSEL   0x00002000  /* 0 = loop mode */
135 #define SCTRL_P2PAUSE     0x00001000  /* 1 = pause mode */
136 #define SCTRL_P1PAUSE     0x00000800  /* 1 = pause mode */
137 #define SCTRL_R1INTEN     0x00000400  /* enable interrupt */
138 #define SCTRL_P2INTEN     0x00000200  /* enable interrupt */
139 #define SCTRL_P1INTEN     0x00000100  /* enable interrupt */
140 #define SCTRL_P1SCTRLD    0x00000080  /* reload sample count register for DAC1 */
141 #define SCTRL_P2DACSEN    0x00000040  /* 1 = DAC2 play back last sample when disabled */
142 #define SCTRL_R1SEB       0x00000020  /* 1 = 16bit */
143 #define SCTRL_R1SMB       0x00000010  /* 1 = stereo */
144 #define SCTRL_R1FMT       0x00000030  /* format mask */
145 #define SCTRL_SH_R1FMT    4
146 #define SCTRL_P2SEB       0x00000008  /* 1 = 16bit */
147 #define SCTRL_P2SMB       0x00000004  /* 1 = stereo */
148 #define SCTRL_P2FMT       0x0000000c  /* format mask */
149 #define SCTRL_SH_P2FMT    2
150 #define SCTRL_P1SEB       0x00000002  /* 1 = 16bit */
151 #define SCTRL_P1SMB       0x00000001  /* 1 = stereo */
152 #define SCTRL_P1FMT       0x00000003  /* format mask */
153 #define SCTRL_SH_P1FMT    0
154 
155 /* End blatant GPL violation */
156 
157 #define NB_CHANNELS 3
158 #define DAC1_CHANNEL 0
159 #define DAC2_CHANNEL 1
160 #define ADC_CHANNEL 2
161 
162 static void es1370_dac1_callback (void *opaque, int free);
163 static void es1370_dac2_callback (void *opaque, int free);
164 static void es1370_adc_callback (void *opaque, int avail);
165 
166 #ifdef DEBUG_ES1370
167 
168 #define ldebug(...) AUD_log ("es1370", __VA_ARGS__)
169 
170 static void print_ctl (uint32_t val)
171 {
172     char buf[1024];
173 
174     buf[0] = '\0';
175 #define a(n) if (val & CTRL_##n) strcat (buf, " "#n)
176     a (ADC_STOP);
177     a (XCTL1);
178     a (OPEN);
179     a (MSFMTSEL);
180     a (M_SBB);
181     a (DAC_SYNC);
182     a (CCB_INTRM);
183     a (M_CB);
184     a (XCTL0);
185     a (BREQ);
186     a (DAC1_EN);
187     a (DAC2_EN);
188     a (ADC_EN);
189     a (UART_EN);
190     a (JYSTK_EN);
191     a (CDC_EN);
192     a (SERR_DIS);
193 #undef a
194     AUD_log ("es1370", "ctl - PCLKDIV %d(DAC2 freq %d), freq %d,%s\n",
195              (val & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV,
196              DAC2_DIVTOSR ((val & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV),
197              dac1_samplerate[(val & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL],
198              buf);
199 }
200 
201 static void print_sctl (uint32_t val)
202 {
203     static const char *fmt_names[] = {"8M", "8S", "16M", "16S"};
204     char buf[1024];
205 
206     buf[0] = '\0';
207 
208 #define a(n) if (val & SCTRL_##n) strcat (buf, " "#n)
209 #define b(n) if (!(val & SCTRL_##n)) strcat (buf, " "#n)
210     b (R1LOOPSEL);
211     b (P2LOOPSEL);
212     b (P1LOOPSEL);
213     a (P2PAUSE);
214     a (P1PAUSE);
215     a (R1INTEN);
216     a (P2INTEN);
217     a (P1INTEN);
218     a (P1SCTRLD);
219     a (P2DACSEN);
220     if (buf[0]) {
221         strcat (buf, "\n        ");
222     }
223     else {
224         buf[0] = ' ';
225         buf[1] = '\0';
226     }
227 #undef b
228 #undef a
229     AUD_log ("es1370",
230              "%s"
231              "p2_end_inc %d, p2_st_inc %d, r1_fmt %s, p2_fmt %s, p1_fmt %s\n",
232              buf,
233              (val & SCTRL_P2ENDINC) >> SCTRL_SH_P2ENDINC,
234              (val & SCTRL_P2STINC) >> SCTRL_SH_P2STINC,
235              fmt_names [(val >> SCTRL_SH_R1FMT) & 3],
236              fmt_names [(val >> SCTRL_SH_P2FMT) & 3],
237              fmt_names [(val >> SCTRL_SH_P1FMT) & 3]
238         );
239 }
240 #else
241 #define ldebug(...)
242 #define print_ctl(...)
243 #define print_sctl(...)
244 #endif
245 
246 #ifdef VERBOSE_ES1370
247 #define dolog(...) AUD_log ("es1370", __VA_ARGS__)
248 #else
249 #define dolog(...)
250 #endif
251 
252 #ifndef SILENT_ES1370
253 #define lwarn(...) AUD_log ("es1370: warning", __VA_ARGS__)
254 #else
255 #define lwarn(...)
256 #endif
257 
258 struct chan {
259     uint32_t shift;
260     uint32_t leftover;
261     uint32_t scount;
262     uint32_t frame_addr;
263     uint32_t frame_cnt;
264 };
265 
266 typedef struct ES1370State {
267     PCIDevice dev;
268     QEMUSoundCard card;
269     MemoryRegion io;
270     struct chan chan[NB_CHANNELS];
271     SWVoiceOut *dac_voice[2];
272     SWVoiceIn *adc_voice;
273 
274     uint32_t ctl;
275     uint32_t status;
276     uint32_t mempage;
277     uint32_t codec;
278     uint32_t sctl;
279 } ES1370State;
280 
281 struct chan_bits {
282     uint32_t ctl_en;
283     uint32_t stat_int;
284     uint32_t sctl_pause;
285     uint32_t sctl_inten;
286     uint32_t sctl_fmt;
287     uint32_t sctl_sh_fmt;
288     uint32_t sctl_loopsel;
289     void (*calc_freq) (ES1370State *s, uint32_t ctl,
290                        uint32_t *old_freq, uint32_t *new_freq);
291 };
292 
293 #define TYPE_ES1370 "ES1370"
294 #define ES1370(obj) \
295     OBJECT_CHECK(ES1370State, (obj), TYPE_ES1370)
296 
297 static void es1370_dac1_calc_freq (ES1370State *s, uint32_t ctl,
298                                    uint32_t *old_freq, uint32_t *new_freq);
299 static void es1370_dac2_and_adc_calc_freq (ES1370State *s, uint32_t ctl,
300                                            uint32_t *old_freq,
301                                            uint32_t *new_freq);
302 
303 static const struct chan_bits es1370_chan_bits[] = {
304     {CTRL_DAC1_EN, STAT_DAC1, SCTRL_P1PAUSE, SCTRL_P1INTEN,
305      SCTRL_P1FMT, SCTRL_SH_P1FMT, SCTRL_P1LOOPSEL,
306      es1370_dac1_calc_freq},
307 
308     {CTRL_DAC2_EN, STAT_DAC2, SCTRL_P2PAUSE, SCTRL_P2INTEN,
309      SCTRL_P2FMT, SCTRL_SH_P2FMT, SCTRL_P2LOOPSEL,
310      es1370_dac2_and_adc_calc_freq},
311 
312     {CTRL_ADC_EN, STAT_ADC, 0, SCTRL_R1INTEN,
313      SCTRL_R1FMT, SCTRL_SH_R1FMT, SCTRL_R1LOOPSEL,
314      es1370_dac2_and_adc_calc_freq}
315 };
316 
317 static void es1370_update_status (ES1370State *s, uint32_t new_status)
318 {
319     uint32_t level = new_status & (STAT_DAC1 | STAT_DAC2 | STAT_ADC);
320 
321     if (level) {
322         s->status = new_status | STAT_INTR;
323     }
324     else {
325         s->status = new_status & ~STAT_INTR;
326     }
327     pci_set_irq(&s->dev, !!level);
328 }
329 
330 static void es1370_reset (ES1370State *s)
331 {
332     size_t i;
333 
334     s->ctl = 1;
335     s->status = 0x60;
336     s->mempage = 0;
337     s->codec = 0;
338     s->sctl = 0;
339 
340     for (i = 0; i < NB_CHANNELS; ++i) {
341         struct chan *d = &s->chan[i];
342         d->scount = 0;
343         d->leftover = 0;
344         if (i == ADC_CHANNEL) {
345             AUD_close_in (&s->card, s->adc_voice);
346             s->adc_voice = NULL;
347         }
348         else {
349             AUD_close_out (&s->card, s->dac_voice[i]);
350             s->dac_voice[i] = NULL;
351         }
352     }
353     pci_irq_deassert(&s->dev);
354 }
355 
356 static void es1370_maybe_lower_irq (ES1370State *s, uint32_t sctl)
357 {
358     uint32_t new_status = s->status;
359 
360     if (!(sctl & SCTRL_P1INTEN) && (s->sctl & SCTRL_P1INTEN)) {
361         new_status &= ~STAT_DAC1;
362     }
363 
364     if (!(sctl & SCTRL_P2INTEN) && (s->sctl & SCTRL_P2INTEN)) {
365         new_status &= ~STAT_DAC2;
366     }
367 
368     if (!(sctl & SCTRL_R1INTEN) && (s->sctl & SCTRL_R1INTEN)) {
369         new_status &= ~STAT_ADC;
370     }
371 
372     if (new_status != s->status) {
373         es1370_update_status (s, new_status);
374     }
375 }
376 
377 static void es1370_dac1_calc_freq (ES1370State *s, uint32_t ctl,
378                                    uint32_t *old_freq, uint32_t *new_freq)
379 
380 {
381     *old_freq = dac1_samplerate[(s->ctl & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL];
382     *new_freq = dac1_samplerate[(ctl & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL];
383 }
384 
385 static void es1370_dac2_and_adc_calc_freq (ES1370State *s, uint32_t ctl,
386                                            uint32_t *old_freq,
387                                            uint32_t *new_freq)
388 
389 {
390     uint32_t old_pclkdiv, new_pclkdiv;
391 
392     new_pclkdiv = (ctl & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV;
393     old_pclkdiv = (s->ctl & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV;
394     *new_freq = DAC2_DIVTOSR (new_pclkdiv);
395     *old_freq = DAC2_DIVTOSR (old_pclkdiv);
396 }
397 
398 static void es1370_update_voices (ES1370State *s, uint32_t ctl, uint32_t sctl)
399 {
400     size_t i;
401     uint32_t old_freq, new_freq, old_fmt, new_fmt;
402 
403     for (i = 0; i < NB_CHANNELS; ++i) {
404         struct chan *d = &s->chan[i];
405         const struct chan_bits *b = &es1370_chan_bits[i];
406 
407         new_fmt = (sctl & b->sctl_fmt) >> b->sctl_sh_fmt;
408         old_fmt = (s->sctl & b->sctl_fmt) >> b->sctl_sh_fmt;
409 
410         b->calc_freq (s, ctl, &old_freq, &new_freq);
411 
412         if ((old_fmt != new_fmt) || (old_freq != new_freq)) {
413             d->shift = (new_fmt & 1) + (new_fmt >> 1);
414             ldebug ("channel %zu, freq = %d, nchannels %d, fmt %d, shift %d\n",
415                     i,
416                     new_freq,
417                     1 << (new_fmt & 1),
418                     (new_fmt & 2) ? AUDIO_FORMAT_S16 : AUDIO_FORMAT_U8,
419                     d->shift);
420             if (new_freq) {
421                 struct audsettings as;
422 
423                 as.freq = new_freq;
424                 as.nchannels = 1 << (new_fmt & 1);
425                 as.fmt = (new_fmt & 2) ? AUDIO_FORMAT_S16 : AUDIO_FORMAT_U8;
426                 as.endianness = 0;
427 
428                 if (i == ADC_CHANNEL) {
429                     s->adc_voice =
430                         AUD_open_in (
431                             &s->card,
432                             s->adc_voice,
433                             "es1370.adc",
434                             s,
435                             es1370_adc_callback,
436                             &as
437                             );
438                 }
439                 else {
440                     s->dac_voice[i] =
441                         AUD_open_out (
442                             &s->card,
443                             s->dac_voice[i],
444                             i ? "es1370.dac2" : "es1370.dac1",
445                             s,
446                             i ? es1370_dac2_callback : es1370_dac1_callback,
447                             &as
448                             );
449                 }
450             }
451         }
452 
453         if (((ctl ^ s->ctl) & b->ctl_en)
454             || ((sctl ^ s->sctl) & b->sctl_pause)) {
455             int on = (ctl & b->ctl_en) && !(sctl & b->sctl_pause);
456 
457             if (i == ADC_CHANNEL) {
458                 AUD_set_active_in (s->adc_voice, on);
459             }
460             else {
461                 AUD_set_active_out (s->dac_voice[i], on);
462             }
463         }
464     }
465 
466     s->ctl = ctl;
467     s->sctl = sctl;
468 }
469 
470 static inline uint32_t es1370_fixup (ES1370State *s, uint32_t addr)
471 {
472     addr &= 0xff;
473     if (addr >= 0x30 && addr <= 0x3f)
474         addr |= s->mempage << 8;
475     return addr;
476 }
477 
478 static void es1370_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
479 {
480     ES1370State *s = opaque;
481     struct chan *d = &s->chan[0];
482 
483     addr = es1370_fixup (s, addr);
484 
485     switch (addr) {
486     case ES1370_REG_CONTROL:
487         es1370_update_voices (s, val, s->sctl);
488         print_ctl (val);
489         break;
490 
491     case ES1370_REG_MEMPAGE:
492         s->mempage = val & 0xf;
493         break;
494 
495     case ES1370_REG_SERIAL_CONTROL:
496         es1370_maybe_lower_irq (s, val);
497         es1370_update_voices (s, s->ctl, val);
498         print_sctl (val);
499         break;
500 
501     case ES1370_REG_DAC1_SCOUNT:
502     case ES1370_REG_DAC2_SCOUNT:
503     case ES1370_REG_ADC_SCOUNT:
504         d += (addr - ES1370_REG_DAC1_SCOUNT) >> 2;
505         d->scount = (val & 0xffff) | (d->scount & ~0xffff);
506         ldebug ("chan %td CURR_SAMP_CT %d, SAMP_CT %d\n",
507                 d - &s->chan[0], val >> 16, (val & 0xffff));
508         break;
509 
510     case ES1370_REG_ADC_FRAMEADR:
511         d += 2;
512         goto frameadr;
513     case ES1370_REG_DAC1_FRAMEADR:
514     case ES1370_REG_DAC2_FRAMEADR:
515         d += (addr - ES1370_REG_DAC1_FRAMEADR) >> 3;
516     frameadr:
517         d->frame_addr = val;
518         ldebug ("chan %td frame address %#x\n", d - &s->chan[0], val);
519         break;
520 
521     case ES1370_REG_PHANTOM_FRAMECNT:
522         lwarn ("writing to phantom frame count %#x\n", val);
523         break;
524     case ES1370_REG_PHANTOM_FRAMEADR:
525         lwarn ("writing to phantom frame address %#x\n", val);
526         break;
527 
528     case ES1370_REG_ADC_FRAMECNT:
529         d += 2;
530         goto framecnt;
531     case ES1370_REG_DAC1_FRAMECNT:
532     case ES1370_REG_DAC2_FRAMECNT:
533         d += (addr - ES1370_REG_DAC1_FRAMECNT) >> 3;
534     framecnt:
535         d->frame_cnt = val;
536         d->leftover = 0;
537         ldebug ("chan %td frame count %d, buffer size %d\n",
538                 d - &s->chan[0], val >> 16, val & 0xffff);
539         break;
540 
541     default:
542         lwarn ("writel %#x <- %#x\n", addr, val);
543         break;
544     }
545 }
546 
547 static uint64_t es1370_read(void *opaque, hwaddr addr, unsigned size)
548 {
549     ES1370State *s = opaque;
550     uint32_t val;
551     struct chan *d = &s->chan[0];
552 
553     addr = es1370_fixup (s, addr);
554 
555     switch (addr) {
556     case ES1370_REG_CONTROL:
557         val = s->ctl;
558         break;
559     case ES1370_REG_STATUS:
560         val = s->status;
561         break;
562     case ES1370_REG_MEMPAGE:
563         val = s->mempage;
564         break;
565     case ES1370_REG_CODEC:
566         val = s->codec;
567         break;
568     case ES1370_REG_SERIAL_CONTROL:
569         val = s->sctl;
570         break;
571 
572     case ES1370_REG_DAC1_SCOUNT:
573     case ES1370_REG_DAC2_SCOUNT:
574     case ES1370_REG_ADC_SCOUNT:
575         d += (addr - ES1370_REG_DAC1_SCOUNT) >> 2;
576         val = d->scount;
577 #ifdef DEBUG_ES1370
578         {
579             uint32_t curr_count = d->scount >> 16;
580             uint32_t count = d->scount & 0xffff;
581 
582             curr_count <<= d->shift;
583             count <<= d->shift;
584             dolog ("read scount curr %d, total %d\n", curr_count, count);
585         }
586 #endif
587         break;
588 
589     case ES1370_REG_ADC_FRAMECNT:
590         d += 2;
591         goto framecnt;
592     case ES1370_REG_DAC1_FRAMECNT:
593     case ES1370_REG_DAC2_FRAMECNT:
594         d += (addr - ES1370_REG_DAC1_FRAMECNT) >> 3;
595     framecnt:
596         val = d->frame_cnt;
597 #ifdef DEBUG_ES1370
598         {
599             uint32_t size = ((d->frame_cnt & 0xffff) + 1) << 2;
600             uint32_t curr = ((d->frame_cnt >> 16) + 1) << 2;
601             if (curr > size) {
602                 dolog ("read framecnt curr %d, size %d %d\n", curr, size,
603                        curr > size);
604             }
605         }
606 #endif
607         break;
608 
609     case ES1370_REG_ADC_FRAMEADR:
610         d += 2;
611         goto frameadr;
612     case ES1370_REG_DAC1_FRAMEADR:
613     case ES1370_REG_DAC2_FRAMEADR:
614         d += (addr - ES1370_REG_DAC1_FRAMEADR) >> 3;
615     frameadr:
616         val = d->frame_addr;
617         break;
618 
619     case ES1370_REG_PHANTOM_FRAMECNT:
620         val = ~0U;
621         lwarn ("reading from phantom frame count\n");
622         break;
623     case ES1370_REG_PHANTOM_FRAMEADR:
624         val = ~0U;
625         lwarn ("reading from phantom frame address\n");
626         break;
627 
628     default:
629         val = ~0U;
630         lwarn ("readl %#x -> %#x\n", addr, val);
631         break;
632     }
633     return val;
634 }
635 
636 static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel,
637                                    int max, int *irq)
638 {
639     uint8_t tmpbuf[4096];
640     uint32_t addr = d->frame_addr;
641     int sc = d->scount & 0xffff;
642     int csc = d->scount >> 16;
643     int csc_bytes = (csc + 1) << d->shift;
644     int cnt = d->frame_cnt >> 16;
645     int size = d->frame_cnt & 0xffff;
646     if (size < cnt) {
647         return;
648     }
649     int left = ((size - cnt + 1) << 2) + d->leftover;
650     int transferred = 0;
651     int temp = MIN (max, MIN (left, csc_bytes));
652     int index = d - &s->chan[0];
653 
654     addr += (cnt << 2) + d->leftover;
655 
656     if (index == ADC_CHANNEL) {
657         while (temp > 0) {
658             int acquired, to_copy;
659 
660             to_copy = MIN ((size_t) temp, sizeof (tmpbuf));
661             acquired = AUD_read (s->adc_voice, tmpbuf, to_copy);
662             if (!acquired)
663                 break;
664 
665             pci_dma_write (&s->dev, addr, tmpbuf, acquired);
666 
667             temp -= acquired;
668             addr += acquired;
669             transferred += acquired;
670         }
671     }
672     else {
673         SWVoiceOut *voice = s->dac_voice[index];
674 
675         while (temp > 0) {
676             int copied, to_copy;
677 
678             to_copy = MIN ((size_t) temp, sizeof (tmpbuf));
679             pci_dma_read (&s->dev, addr, tmpbuf, to_copy);
680             copied = AUD_write (voice, tmpbuf, to_copy);
681             if (!copied)
682                 break;
683             temp -= copied;
684             addr += copied;
685             transferred += copied;
686         }
687     }
688 
689     if (csc_bytes == transferred) {
690         *irq = 1;
691         d->scount = sc | (sc << 16);
692         ldebug ("sc = %d, rate = %f\n",
693                 (sc + 1) << d->shift,
694                 (sc + 1) / (double) 44100);
695     }
696     else {
697         *irq = 0;
698         d->scount = sc | (((csc_bytes - transferred - 1) >> d->shift) << 16);
699     }
700 
701     cnt += (transferred + d->leftover) >> 2;
702 
703     if (s->sctl & loop_sel) {
704         /* Bah, how stupid is that having a 0 represent true value?
705            i just spent few hours on this shit */
706         AUD_log ("es1370: warning", "non looping mode\n");
707     }
708     else {
709         d->frame_cnt = size;
710 
711         if ((uint32_t) cnt <= d->frame_cnt)
712             d->frame_cnt |= cnt << 16;
713     }
714 
715     d->leftover = (transferred + d->leftover) & 3;
716 }
717 
718 static void es1370_run_channel (ES1370State *s, size_t chan, int free_or_avail)
719 {
720     uint32_t new_status = s->status;
721     int max_bytes, irq;
722     struct chan *d = &s->chan[chan];
723     const struct chan_bits *b = &es1370_chan_bits[chan];
724 
725     if (!(s->ctl & b->ctl_en) || (s->sctl & b->sctl_pause)) {
726         return;
727     }
728 
729     max_bytes = free_or_avail;
730     max_bytes &= ~((1 << d->shift) - 1);
731     if (!max_bytes) {
732         return;
733     }
734 
735     es1370_transfer_audio (s, d, b->sctl_loopsel, max_bytes, &irq);
736 
737     if (irq) {
738         if (s->sctl & b->sctl_inten) {
739             new_status |= b->stat_int;
740         }
741     }
742 
743     if (new_status != s->status) {
744         es1370_update_status (s, new_status);
745     }
746 }
747 
748 static void es1370_dac1_callback (void *opaque, int free)
749 {
750     ES1370State *s = opaque;
751 
752     es1370_run_channel (s, DAC1_CHANNEL, free);
753 }
754 
755 static void es1370_dac2_callback (void *opaque, int free)
756 {
757     ES1370State *s = opaque;
758 
759     es1370_run_channel (s, DAC2_CHANNEL, free);
760 }
761 
762 static void es1370_adc_callback (void *opaque, int avail)
763 {
764     ES1370State *s = opaque;
765 
766     es1370_run_channel (s, ADC_CHANNEL, avail);
767 }
768 
769 static const MemoryRegionOps es1370_io_ops = {
770     .read = es1370_read,
771     .write = es1370_write,
772     .valid = {
773         .min_access_size = 1,
774         .max_access_size = 4,
775     },
776     .impl = {
777         .min_access_size = 4,
778         .max_access_size = 4,
779     },
780     .endianness = DEVICE_LITTLE_ENDIAN,
781 };
782 
783 static const VMStateDescription vmstate_es1370_channel = {
784     .name = "es1370_channel",
785     .version_id = 2,
786     .minimum_version_id = 2,
787     .fields = (VMStateField[]) {
788         VMSTATE_UINT32 (shift, struct chan),
789         VMSTATE_UINT32 (leftover, struct chan),
790         VMSTATE_UINT32 (scount, struct chan),
791         VMSTATE_UINT32 (frame_addr, struct chan),
792         VMSTATE_UINT32 (frame_cnt, struct chan),
793         VMSTATE_END_OF_LIST ()
794     }
795 };
796 
797 static int es1370_post_load (void *opaque, int version_id)
798 {
799     uint32_t ctl, sctl;
800     ES1370State *s = opaque;
801     size_t i;
802 
803     for (i = 0; i < NB_CHANNELS; ++i) {
804         if (i == ADC_CHANNEL) {
805             if (s->adc_voice) {
806                 AUD_close_in (&s->card, s->adc_voice);
807                 s->adc_voice = NULL;
808             }
809         }
810         else {
811             if (s->dac_voice[i]) {
812                 AUD_close_out (&s->card, s->dac_voice[i]);
813                 s->dac_voice[i] = NULL;
814             }
815         }
816     }
817 
818     ctl = s->ctl;
819     sctl = s->sctl;
820     s->ctl = 0;
821     s->sctl = 0;
822     es1370_update_voices (s, ctl, sctl);
823     return 0;
824 }
825 
826 static const VMStateDescription vmstate_es1370 = {
827     .name = "es1370",
828     .version_id = 2,
829     .minimum_version_id = 2,
830     .post_load = es1370_post_load,
831     .fields = (VMStateField[]) {
832         VMSTATE_PCI_DEVICE (dev, ES1370State),
833         VMSTATE_STRUCT_ARRAY (chan, ES1370State, NB_CHANNELS, 2,
834                               vmstate_es1370_channel, struct chan),
835         VMSTATE_UINT32 (ctl, ES1370State),
836         VMSTATE_UINT32 (status, ES1370State),
837         VMSTATE_UINT32 (mempage, ES1370State),
838         VMSTATE_UINT32 (codec, ES1370State),
839         VMSTATE_UINT32 (sctl, ES1370State),
840         VMSTATE_END_OF_LIST ()
841     }
842 };
843 
844 static void es1370_on_reset(DeviceState *dev)
845 {
846     ES1370State *s = container_of(dev, ES1370State, dev.qdev);
847     es1370_reset (s);
848 }
849 
850 static void es1370_realize(PCIDevice *dev, Error **errp)
851 {
852     ES1370State *s = ES1370(dev);
853     uint8_t *c = s->dev.config;
854 
855     c[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_SLOW >> 8;
856 
857 #if 0
858     c[PCI_CAPABILITY_LIST] = 0xdc;
859     c[PCI_INTERRUPT_LINE] = 10;
860     c[0xdc] = 0x00;
861 #endif
862 
863     c[PCI_INTERRUPT_PIN] = 1;
864     c[PCI_MIN_GNT] = 0x0c;
865     c[PCI_MAX_LAT] = 0x80;
866 
867     memory_region_init_io (&s->io, OBJECT(s), &es1370_io_ops, s, "es1370", 256);
868     pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
869 
870     AUD_register_card ("es1370", &s->card);
871     es1370_reset (s);
872 }
873 
874 static void es1370_exit(PCIDevice *dev)
875 {
876     ES1370State *s = ES1370(dev);
877     int i;
878 
879     for (i = 0; i < 2; ++i) {
880         AUD_close_out(&s->card, s->dac_voice[i]);
881     }
882 
883     AUD_close_in(&s->card, s->adc_voice);
884     AUD_remove_card(&s->card);
885 }
886 
887 static int es1370_init (PCIBus *bus)
888 {
889     pci_create_simple (bus, -1, TYPE_ES1370);
890     return 0;
891 }
892 
893 static Property es1370_properties[] = {
894     DEFINE_AUDIO_PROPERTIES(ES1370State, card),
895     DEFINE_PROP_END_OF_LIST(),
896 };
897 
898 static void es1370_class_init (ObjectClass *klass, void *data)
899 {
900     DeviceClass *dc = DEVICE_CLASS (klass);
901     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
902 
903     k->realize = es1370_realize;
904     k->exit = es1370_exit;
905     k->vendor_id = PCI_VENDOR_ID_ENSONIQ;
906     k->device_id = PCI_DEVICE_ID_ENSONIQ_ES1370;
907     k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
908     k->subsystem_vendor_id = 0x4942;
909     k->subsystem_id = 0x4c4c;
910     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
911     dc->desc = "ENSONIQ AudioPCI ES1370";
912     dc->vmsd = &vmstate_es1370;
913     dc->reset = es1370_on_reset;
914     device_class_set_props(dc, es1370_properties);
915 }
916 
917 static const TypeInfo es1370_info = {
918     .name          = TYPE_ES1370,
919     .parent        = TYPE_PCI_DEVICE,
920     .instance_size = sizeof (ES1370State),
921     .class_init    = es1370_class_init,
922     .interfaces = (InterfaceInfo[]) {
923         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
924         { },
925     },
926 };
927 
928 static void es1370_register_types (void)
929 {
930     type_register_static (&es1370_info);
931     pci_register_soundhw("es1370", "ENSONIQ AudioPCI ES1370", es1370_init);
932 }
933 
934 type_init (es1370_register_types)
935