xref: /openbmc/qemu/hw/audio/es1370.c (revision 80adf54e)
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/hw.h"
31 #include "hw/audio/soundhw.h"
32 #include "audio/audio.h"
33 #include "hw/pci/pci.h"
34 #include "sysemu/dma.h"
35 
36 /* Missing stuff:
37    SCTRL_P[12](END|ST)INC
38    SCTRL_P1SCTRLD
39    SCTRL_P2DACSEN
40    CTRL_DAC_SYNC
41    MIDI
42    non looped mode
43    surely more
44 */
45 
46 /*
47   Following macros and samplerate array were copied verbatim from
48   Linux kernel 2.4.30: drivers/sound/es1370.c
49 
50   Copyright (C) 1998-2001, 2003 Thomas Sailer (t.sailer@alumni.ethz.ch)
51 */
52 
53 /* Start blatant GPL violation */
54 
55 #define ES1370_REG_CONTROL        0x00
56 #define ES1370_REG_STATUS         0x04
57 #define ES1370_REG_UART_DATA      0x08
58 #define ES1370_REG_UART_STATUS    0x09
59 #define ES1370_REG_UART_CONTROL   0x09
60 #define ES1370_REG_UART_TEST      0x0a
61 #define ES1370_REG_MEMPAGE        0x0c
62 #define ES1370_REG_CODEC          0x10
63 #define ES1370_REG_SERIAL_CONTROL 0x20
64 #define ES1370_REG_DAC1_SCOUNT    0x24
65 #define ES1370_REG_DAC2_SCOUNT    0x28
66 #define ES1370_REG_ADC_SCOUNT     0x2c
67 
68 #define ES1370_REG_DAC1_FRAMEADR    0xc30
69 #define ES1370_REG_DAC1_FRAMECNT    0xc34
70 #define ES1370_REG_DAC2_FRAMEADR    0xc38
71 #define ES1370_REG_DAC2_FRAMECNT    0xc3c
72 #define ES1370_REG_ADC_FRAMEADR     0xd30
73 #define ES1370_REG_ADC_FRAMECNT     0xd34
74 #define ES1370_REG_PHANTOM_FRAMEADR 0xd38
75 #define ES1370_REG_PHANTOM_FRAMECNT 0xd3c
76 
77 static const unsigned dac1_samplerate[] = { 5512, 11025, 22050, 44100 };
78 
79 #define DAC2_SRTODIV(x) (((1411200+(x)/2)/(x))-2)
80 #define DAC2_DIVTOSR(x) (1411200/((x)+2))
81 
82 #define CTRL_ADC_STOP   0x80000000  /* 1 = ADC stopped */
83 #define CTRL_XCTL1      0x40000000  /* electret mic bias */
84 #define CTRL_OPEN       0x20000000  /* no function, can be read and written */
85 #define CTRL_PCLKDIV    0x1fff0000  /* ADC/DAC2 clock divider */
86 #define CTRL_SH_PCLKDIV 16
87 #define CTRL_MSFMTSEL   0x00008000  /* MPEG serial data fmt: 0 = Sony, 1 = I2S */
88 #define CTRL_M_SBB      0x00004000  /* DAC2 clock: 0 = PCLKDIV, 1 = MPEG */
89 #define CTRL_WTSRSEL    0x00003000  /* DAC1 clock freq: 0=5512, 1=11025, 2=22050, 3=44100 */
90 #define CTRL_SH_WTSRSEL 12
91 #define CTRL_DAC_SYNC   0x00000800  /* 1 = DAC2 runs off DAC1 clock */
92 #define CTRL_CCB_INTRM  0x00000400  /* 1 = CCB "voice" ints enabled */
93 #define CTRL_M_CB       0x00000200  /* recording source: 0 = ADC, 1 = MPEG */
94 #define CTRL_XCTL0      0x00000100  /* 0 = Line in, 1 = Line out */
95 #define CTRL_BREQ       0x00000080  /* 1 = test mode (internal mem test) */
96 #define CTRL_DAC1_EN    0x00000040  /* enable DAC1 */
97 #define CTRL_DAC2_EN    0x00000020  /* enable DAC2 */
98 #define CTRL_ADC_EN     0x00000010  /* enable ADC */
99 #define CTRL_UART_EN    0x00000008  /* enable MIDI uart */
100 #define CTRL_JYSTK_EN   0x00000004  /* enable Joystick port (presumably at address 0x200) */
101 #define CTRL_CDC_EN     0x00000002  /* enable serial (CODEC) interface */
102 #define CTRL_SERR_DIS   0x00000001  /* 1 = disable PCI SERR signal */
103 
104 #define STAT_INTR       0x80000000  /* wired or of all interrupt bits */
105 #define STAT_CSTAT      0x00000400  /* 1 = codec busy or codec write in progress */
106 #define STAT_CBUSY      0x00000200  /* 1 = codec busy */
107 #define STAT_CWRIP      0x00000100  /* 1 = codec write in progress */
108 #define STAT_VC         0x00000060  /* CCB int source, 0=DAC1, 1=DAC2, 2=ADC, 3=undef */
109 #define STAT_SH_VC      5
110 #define STAT_MCCB       0x00000010  /* CCB int pending */
111 #define STAT_UART       0x00000008  /* UART int pending */
112 #define STAT_DAC1       0x00000004  /* DAC1 int pending */
113 #define STAT_DAC2       0x00000002  /* DAC2 int pending */
114 #define STAT_ADC        0x00000001  /* ADC int pending */
115 
116 #define USTAT_RXINT     0x80        /* UART rx int pending */
117 #define USTAT_TXINT     0x04        /* UART tx int pending */
118 #define USTAT_TXRDY     0x02        /* UART tx ready */
119 #define USTAT_RXRDY     0x01        /* UART rx ready */
120 
121 #define UCTRL_RXINTEN   0x80        /* 1 = enable RX ints */
122 #define UCTRL_TXINTEN   0x60        /* TX int enable field mask */
123 #define UCTRL_ENA_TXINT 0x20        /* enable TX int */
124 #define UCTRL_CNTRL     0x03        /* control field */
125 #define UCTRL_CNTRL_SWR 0x03        /* software reset command */
126 
127 #define SCTRL_P2ENDINC    0x00380000  /*  */
128 #define SCTRL_SH_P2ENDINC 19
129 #define SCTRL_P2STINC     0x00070000  /*  */
130 #define SCTRL_SH_P2STINC  16
131 #define SCTRL_R1LOOPSEL   0x00008000  /* 0 = loop mode */
132 #define SCTRL_P2LOOPSEL   0x00004000  /* 0 = loop mode */
133 #define SCTRL_P1LOOPSEL   0x00002000  /* 0 = loop mode */
134 #define SCTRL_P2PAUSE     0x00001000  /* 1 = pause mode */
135 #define SCTRL_P1PAUSE     0x00000800  /* 1 = pause mode */
136 #define SCTRL_R1INTEN     0x00000400  /* enable interrupt */
137 #define SCTRL_P2INTEN     0x00000200  /* enable interrupt */
138 #define SCTRL_P1INTEN     0x00000100  /* enable interrupt */
139 #define SCTRL_P1SCTRLD    0x00000080  /* reload sample count register for DAC1 */
140 #define SCTRL_P2DACSEN    0x00000040  /* 1 = DAC2 play back last sample when disabled */
141 #define SCTRL_R1SEB       0x00000020  /* 1 = 16bit */
142 #define SCTRL_R1SMB       0x00000010  /* 1 = stereo */
143 #define SCTRL_R1FMT       0x00000030  /* format mask */
144 #define SCTRL_SH_R1FMT    4
145 #define SCTRL_P2SEB       0x00000008  /* 1 = 16bit */
146 #define SCTRL_P2SMB       0x00000004  /* 1 = stereo */
147 #define SCTRL_P2FMT       0x0000000c  /* format mask */
148 #define SCTRL_SH_P2FMT    2
149 #define SCTRL_P1SEB       0x00000002  /* 1 = 16bit */
150 #define SCTRL_P1SMB       0x00000001  /* 1 = stereo */
151 #define SCTRL_P1FMT       0x00000003  /* format mask */
152 #define SCTRL_SH_P1FMT    0
153 
154 /* End blatant GPL violation */
155 
156 #define NB_CHANNELS 3
157 #define DAC1_CHANNEL 0
158 #define DAC2_CHANNEL 1
159 #define ADC_CHANNEL 2
160 
161 static void es1370_dac1_callback (void *opaque, int free);
162 static void es1370_dac2_callback (void *opaque, int free);
163 static void es1370_adc_callback (void *opaque, int avail);
164 
165 #ifdef DEBUG_ES1370
166 
167 #define ldebug(...) AUD_log ("es1370", __VA_ARGS__)
168 
169 static void print_ctl (uint32_t val)
170 {
171     char buf[1024];
172 
173     buf[0] = '\0';
174 #define a(n) if (val & CTRL_##n) strcat (buf, " "#n)
175     a (ADC_STOP);
176     a (XCTL1);
177     a (OPEN);
178     a (MSFMTSEL);
179     a (M_SBB);
180     a (DAC_SYNC);
181     a (CCB_INTRM);
182     a (M_CB);
183     a (XCTL0);
184     a (BREQ);
185     a (DAC1_EN);
186     a (DAC2_EN);
187     a (ADC_EN);
188     a (UART_EN);
189     a (JYSTK_EN);
190     a (CDC_EN);
191     a (SERR_DIS);
192 #undef a
193     AUD_log ("es1370", "ctl - PCLKDIV %d(DAC2 freq %d), freq %d,%s\n",
194              (val & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV,
195              DAC2_DIVTOSR ((val & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV),
196              dac1_samplerate[(val & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL],
197              buf);
198 }
199 
200 static void print_sctl (uint32_t val)
201 {
202     static const char *fmt_names[] = {"8M", "8S", "16M", "16S"};
203     char buf[1024];
204 
205     buf[0] = '\0';
206 
207 #define a(n) if (val & SCTRL_##n) strcat (buf, " "#n)
208 #define b(n) if (!(val & SCTRL_##n)) strcat (buf, " "#n)
209     b (R1LOOPSEL);
210     b (P2LOOPSEL);
211     b (P1LOOPSEL);
212     a (P2PAUSE);
213     a (P1PAUSE);
214     a (R1INTEN);
215     a (P2INTEN);
216     a (P1INTEN);
217     a (P1SCTRLD);
218     a (P2DACSEN);
219     if (buf[0]) {
220         strcat (buf, "\n        ");
221     }
222     else {
223         buf[0] = ' ';
224         buf[1] = '\0';
225     }
226 #undef b
227 #undef a
228     AUD_log ("es1370",
229              "%s"
230              "p2_end_inc %d, p2_st_inc %d, r1_fmt %s, p2_fmt %s, p1_fmt %s\n",
231              buf,
232              (val & SCTRL_P2ENDINC) >> SCTRL_SH_P2ENDINC,
233              (val & SCTRL_P2STINC) >> SCTRL_SH_P2STINC,
234              fmt_names [(val >> SCTRL_SH_R1FMT) & 3],
235              fmt_names [(val >> SCTRL_SH_P2FMT) & 3],
236              fmt_names [(val >> SCTRL_SH_P1FMT) & 3]
237         );
238 }
239 #else
240 #define ldebug(...)
241 #define print_ctl(...)
242 #define print_sctl(...)
243 #endif
244 
245 #ifdef VERBOSE_ES1370
246 #define dolog(...) AUD_log ("es1370", __VA_ARGS__)
247 #else
248 #define dolog(...)
249 #endif
250 
251 #ifndef SILENT_ES1370
252 #define lwarn(...) AUD_log ("es1370: warning", __VA_ARGS__)
253 #else
254 #define lwarn(...)
255 #endif
256 
257 struct chan {
258     uint32_t shift;
259     uint32_t leftover;
260     uint32_t scount;
261     uint32_t frame_addr;
262     uint32_t frame_cnt;
263 };
264 
265 typedef struct ES1370State {
266     PCIDevice dev;
267     QEMUSoundCard card;
268     MemoryRegion io;
269     struct chan chan[NB_CHANNELS];
270     SWVoiceOut *dac_voice[2];
271     SWVoiceIn *adc_voice;
272 
273     uint32_t ctl;
274     uint32_t status;
275     uint32_t mempage;
276     uint32_t codec;
277     uint32_t sctl;
278 } ES1370State;
279 
280 struct chan_bits {
281     uint32_t ctl_en;
282     uint32_t stat_int;
283     uint32_t sctl_pause;
284     uint32_t sctl_inten;
285     uint32_t sctl_fmt;
286     uint32_t sctl_sh_fmt;
287     uint32_t sctl_loopsel;
288     void (*calc_freq) (ES1370State *s, uint32_t ctl,
289                        uint32_t *old_freq, uint32_t *new_freq);
290 };
291 
292 #define TYPE_ES1370 "ES1370"
293 #define ES1370(obj) \
294     OBJECT_CHECK(ES1370State, (obj), TYPE_ES1370)
295 
296 static void es1370_dac1_calc_freq (ES1370State *s, uint32_t ctl,
297                                    uint32_t *old_freq, uint32_t *new_freq);
298 static void es1370_dac2_and_adc_calc_freq (ES1370State *s, uint32_t ctl,
299                                            uint32_t *old_freq,
300                                            uint32_t *new_freq);
301 
302 static const struct chan_bits es1370_chan_bits[] = {
303     {CTRL_DAC1_EN, STAT_DAC1, SCTRL_P1PAUSE, SCTRL_P1INTEN,
304      SCTRL_P1FMT, SCTRL_SH_P1FMT, SCTRL_P1LOOPSEL,
305      es1370_dac1_calc_freq},
306 
307     {CTRL_DAC2_EN, STAT_DAC2, SCTRL_P2PAUSE, SCTRL_P2INTEN,
308      SCTRL_P2FMT, SCTRL_SH_P2FMT, SCTRL_P2LOOPSEL,
309      es1370_dac2_and_adc_calc_freq},
310 
311     {CTRL_ADC_EN, STAT_ADC, 0, SCTRL_R1INTEN,
312      SCTRL_R1FMT, SCTRL_SH_R1FMT, SCTRL_R1LOOPSEL,
313      es1370_dac2_and_adc_calc_freq}
314 };
315 
316 static void es1370_update_status (ES1370State *s, uint32_t new_status)
317 {
318     uint32_t level = new_status & (STAT_DAC1 | STAT_DAC2 | STAT_ADC);
319 
320     if (level) {
321         s->status = new_status | STAT_INTR;
322     }
323     else {
324         s->status = new_status & ~STAT_INTR;
325     }
326     pci_set_irq(&s->dev, !!level);
327 }
328 
329 static void es1370_reset (ES1370State *s)
330 {
331     size_t i;
332 
333     s->ctl = 1;
334     s->status = 0x60;
335     s->mempage = 0;
336     s->codec = 0;
337     s->sctl = 0;
338 
339     for (i = 0; i < NB_CHANNELS; ++i) {
340         struct chan *d = &s->chan[i];
341         d->scount = 0;
342         d->leftover = 0;
343         if (i == ADC_CHANNEL) {
344             AUD_close_in (&s->card, s->adc_voice);
345             s->adc_voice = NULL;
346         }
347         else {
348             AUD_close_out (&s->card, s->dac_voice[i]);
349             s->dac_voice[i] = NULL;
350         }
351     }
352     pci_irq_deassert(&s->dev);
353 }
354 
355 static void es1370_maybe_lower_irq (ES1370State *s, uint32_t sctl)
356 {
357     uint32_t new_status = s->status;
358 
359     if (!(sctl & SCTRL_P1INTEN) && (s->sctl & SCTRL_P1INTEN)) {
360         new_status &= ~STAT_DAC1;
361     }
362 
363     if (!(sctl & SCTRL_P2INTEN) && (s->sctl & SCTRL_P2INTEN)) {
364         new_status &= ~STAT_DAC2;
365     }
366 
367     if (!(sctl & SCTRL_R1INTEN) && (s->sctl & SCTRL_R1INTEN)) {
368         new_status &= ~STAT_ADC;
369     }
370 
371     if (new_status != s->status) {
372         es1370_update_status (s, new_status);
373     }
374 }
375 
376 static void es1370_dac1_calc_freq (ES1370State *s, uint32_t ctl,
377                                    uint32_t *old_freq, uint32_t *new_freq)
378 
379 {
380     *old_freq = dac1_samplerate[(s->ctl & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL];
381     *new_freq = dac1_samplerate[(ctl & CTRL_WTSRSEL) >> CTRL_SH_WTSRSEL];
382 }
383 
384 static void es1370_dac2_and_adc_calc_freq (ES1370State *s, uint32_t ctl,
385                                            uint32_t *old_freq,
386                                            uint32_t *new_freq)
387 
388 {
389     uint32_t old_pclkdiv, new_pclkdiv;
390 
391     new_pclkdiv = (ctl & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV;
392     old_pclkdiv = (s->ctl & CTRL_PCLKDIV) >> CTRL_SH_PCLKDIV;
393     *new_freq = DAC2_DIVTOSR (new_pclkdiv);
394     *old_freq = DAC2_DIVTOSR (old_pclkdiv);
395 }
396 
397 static void es1370_update_voices (ES1370State *s, uint32_t ctl, uint32_t sctl)
398 {
399     size_t i;
400     uint32_t old_freq, new_freq, old_fmt, new_fmt;
401 
402     for (i = 0; i < NB_CHANNELS; ++i) {
403         struct chan *d = &s->chan[i];
404         const struct chan_bits *b = &es1370_chan_bits[i];
405 
406         new_fmt = (sctl & b->sctl_fmt) >> b->sctl_sh_fmt;
407         old_fmt = (s->sctl & b->sctl_fmt) >> b->sctl_sh_fmt;
408 
409         b->calc_freq (s, ctl, &old_freq, &new_freq);
410 
411         if ((old_fmt != new_fmt) || (old_freq != new_freq)) {
412             d->shift = (new_fmt & 1) + (new_fmt >> 1);
413             ldebug ("channel %zu, freq = %d, nchannels %d, fmt %d, shift %d\n",
414                     i,
415                     new_freq,
416                     1 << (new_fmt & 1),
417                     (new_fmt & 2) ? AUD_FMT_S16 : AUD_FMT_U8,
418                     d->shift);
419             if (new_freq) {
420                 struct audsettings as;
421 
422                 as.freq = new_freq;
423                 as.nchannels = 1 << (new_fmt & 1);
424                 as.fmt = (new_fmt & 2) ? AUD_FMT_S16 : AUD_FMT_U8;
425                 as.endianness = 0;
426 
427                 if (i == ADC_CHANNEL) {
428                     s->adc_voice =
429                         AUD_open_in (
430                             &s->card,
431                             s->adc_voice,
432                             "es1370.adc",
433                             s,
434                             es1370_adc_callback,
435                             &as
436                             );
437                 }
438                 else {
439                     s->dac_voice[i] =
440                         AUD_open_out (
441                             &s->card,
442                             s->dac_voice[i],
443                             i ? "es1370.dac2" : "es1370.dac1",
444                             s,
445                             i ? es1370_dac2_callback : es1370_dac1_callback,
446                             &as
447                             );
448                 }
449             }
450         }
451 
452         if (((ctl ^ s->ctl) & b->ctl_en)
453             || ((sctl ^ s->sctl) & b->sctl_pause)) {
454             int on = (ctl & b->ctl_en) && !(sctl & b->sctl_pause);
455 
456             if (i == ADC_CHANNEL) {
457                 AUD_set_active_in (s->adc_voice, on);
458             }
459             else {
460                 AUD_set_active_out (s->dac_voice[i], on);
461             }
462         }
463     }
464 
465     s->ctl = ctl;
466     s->sctl = sctl;
467 }
468 
469 static inline uint32_t es1370_fixup (ES1370State *s, uint32_t addr)
470 {
471     addr &= 0xff;
472     if (addr >= 0x30 && addr <= 0x3f)
473         addr |= s->mempage << 8;
474     return addr;
475 }
476 
477 static void es1370_writeb(void *opaque, uint32_t addr, uint32_t val)
478 {
479     ES1370State *s = opaque;
480     uint32_t shift, mask;
481 
482     addr = es1370_fixup (s, addr);
483 
484     switch (addr) {
485     case ES1370_REG_CONTROL:
486     case ES1370_REG_CONTROL + 1:
487     case ES1370_REG_CONTROL + 2:
488     case ES1370_REG_CONTROL + 3:
489         shift = (addr - ES1370_REG_CONTROL) << 3;
490         mask = 0xff << shift;
491         val = (s->ctl & ~mask) | ((val & 0xff) << shift);
492         es1370_update_voices (s, val, s->sctl);
493         print_ctl (val);
494         break;
495     case ES1370_REG_MEMPAGE:
496         s->mempage = val;
497         break;
498     case ES1370_REG_SERIAL_CONTROL:
499     case ES1370_REG_SERIAL_CONTROL + 1:
500     case ES1370_REG_SERIAL_CONTROL + 2:
501     case ES1370_REG_SERIAL_CONTROL + 3:
502         shift = (addr - ES1370_REG_SERIAL_CONTROL) << 3;
503         mask = 0xff << shift;
504         val = (s->sctl & ~mask) | ((val & 0xff) << shift);
505         es1370_maybe_lower_irq (s, val);
506         es1370_update_voices (s, s->ctl, val);
507         print_sctl (val);
508         break;
509     default:
510         lwarn ("writeb %#x <- %#x\n", addr, val);
511         break;
512     }
513 }
514 
515 static void es1370_writew(void *opaque, uint32_t addr, uint32_t val)
516 {
517     ES1370State *s = opaque;
518     addr = es1370_fixup (s, addr);
519     uint32_t shift, mask;
520     struct chan *d = &s->chan[0];
521 
522     switch (addr) {
523     case ES1370_REG_CODEC:
524         dolog ("ignored codec write address %#x, data %#x\n",
525                (val >> 8) & 0xff, val & 0xff);
526         s->codec = val;
527         break;
528 
529     case ES1370_REG_CONTROL:
530     case ES1370_REG_CONTROL + 2:
531         shift = (addr != ES1370_REG_CONTROL) << 4;
532         mask = 0xffff << shift;
533         val = (s->ctl & ~mask) | ((val & 0xffff) << shift);
534         es1370_update_voices (s, val, s->sctl);
535         print_ctl (val);
536         break;
537 
538     case ES1370_REG_ADC_SCOUNT:
539         d++;
540     case ES1370_REG_DAC2_SCOUNT:
541         d++;
542     case ES1370_REG_DAC1_SCOUNT:
543         d->scount = (d->scount & ~0xffff) | (val & 0xffff);
544         break;
545 
546     default:
547         lwarn ("writew %#x <- %#x\n", addr, val);
548         break;
549     }
550 }
551 
552 static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
553 {
554     ES1370State *s = opaque;
555     struct chan *d = &s->chan[0];
556 
557     addr = es1370_fixup (s, addr);
558 
559     switch (addr) {
560     case ES1370_REG_CONTROL:
561         es1370_update_voices (s, val, s->sctl);
562         print_ctl (val);
563         break;
564 
565     case ES1370_REG_MEMPAGE:
566         s->mempage = val & 0xf;
567         break;
568 
569     case ES1370_REG_SERIAL_CONTROL:
570         es1370_maybe_lower_irq (s, val);
571         es1370_update_voices (s, s->ctl, val);
572         print_sctl (val);
573         break;
574 
575     case ES1370_REG_ADC_SCOUNT:
576         d++;
577     case ES1370_REG_DAC2_SCOUNT:
578         d++;
579     case ES1370_REG_DAC1_SCOUNT:
580         d->scount = (val & 0xffff) | (d->scount & ~0xffff);
581         ldebug ("chan %td CURR_SAMP_CT %d, SAMP_CT %d\n",
582                 d - &s->chan[0], val >> 16, (val & 0xffff));
583         break;
584 
585     case ES1370_REG_ADC_FRAMEADR:
586         d++;
587     case ES1370_REG_DAC2_FRAMEADR:
588         d++;
589     case ES1370_REG_DAC1_FRAMEADR:
590         d->frame_addr = val;
591         ldebug ("chan %td frame address %#x\n", d - &s->chan[0], val);
592         break;
593 
594     case ES1370_REG_PHANTOM_FRAMECNT:
595         lwarn ("writing to phantom frame count %#x\n", val);
596         break;
597     case ES1370_REG_PHANTOM_FRAMEADR:
598         lwarn ("writing to phantom frame address %#x\n", val);
599         break;
600 
601     case ES1370_REG_ADC_FRAMECNT:
602         d++;
603     case ES1370_REG_DAC2_FRAMECNT:
604         d++;
605     case ES1370_REG_DAC1_FRAMECNT:
606         d->frame_cnt = val;
607         d->leftover = 0;
608         ldebug ("chan %td frame count %d, buffer size %d\n",
609                 d - &s->chan[0], val >> 16, val & 0xffff);
610         break;
611 
612     default:
613         lwarn ("writel %#x <- %#x\n", addr, val);
614         break;
615     }
616 }
617 
618 static uint32_t es1370_readb(void *opaque, uint32_t addr)
619 {
620     ES1370State *s = opaque;
621     uint32_t val;
622 
623     addr = es1370_fixup (s, addr);
624 
625     switch (addr) {
626     case 0x1b:                  /* Legacy */
627         lwarn ("Attempt to read from legacy register\n");
628         val = 5;
629         break;
630     case ES1370_REG_MEMPAGE:
631         val = s->mempage;
632         break;
633     case ES1370_REG_CONTROL + 0:
634     case ES1370_REG_CONTROL + 1:
635     case ES1370_REG_CONTROL + 2:
636     case ES1370_REG_CONTROL + 3:
637         val = s->ctl >> ((addr - ES1370_REG_CONTROL) << 3);
638         break;
639     case ES1370_REG_STATUS + 0:
640     case ES1370_REG_STATUS + 1:
641     case ES1370_REG_STATUS + 2:
642     case ES1370_REG_STATUS + 3:
643         val = s->status >> ((addr - ES1370_REG_STATUS) << 3);
644         break;
645     default:
646         val = ~0;
647         lwarn ("readb %#x -> %#x\n", addr, val);
648         break;
649     }
650     return val;
651 }
652 
653 static uint32_t es1370_readw(void *opaque, uint32_t addr)
654 {
655     ES1370State *s = opaque;
656     struct chan *d = &s->chan[0];
657     uint32_t val;
658 
659     addr = es1370_fixup (s, addr);
660 
661     switch (addr) {
662     case ES1370_REG_ADC_SCOUNT + 2:
663         d++;
664     case ES1370_REG_DAC2_SCOUNT + 2:
665         d++;
666     case ES1370_REG_DAC1_SCOUNT + 2:
667         val = d->scount >> 16;
668         break;
669 
670     case ES1370_REG_ADC_FRAMECNT:
671         d++;
672     case ES1370_REG_DAC2_FRAMECNT:
673         d++;
674     case ES1370_REG_DAC1_FRAMECNT:
675         val = d->frame_cnt & 0xffff;
676         break;
677 
678     case ES1370_REG_ADC_FRAMECNT + 2:
679         d++;
680     case ES1370_REG_DAC2_FRAMECNT + 2:
681         d++;
682     case ES1370_REG_DAC1_FRAMECNT + 2:
683         val = d->frame_cnt >> 16;
684         break;
685 
686     default:
687         val = ~0;
688         lwarn ("readw %#x -> %#x\n", addr, val);
689         break;
690     }
691 
692     return val;
693 }
694 
695 static uint32_t es1370_readl(void *opaque, uint32_t addr)
696 {
697     ES1370State *s = opaque;
698     uint32_t val;
699     struct chan *d = &s->chan[0];
700 
701     addr = es1370_fixup (s, addr);
702 
703     switch (addr) {
704     case ES1370_REG_CONTROL:
705         val = s->ctl;
706         break;
707     case ES1370_REG_STATUS:
708         val = s->status;
709         break;
710     case ES1370_REG_MEMPAGE:
711         val = s->mempage;
712         break;
713     case ES1370_REG_CODEC:
714         val = s->codec;
715         break;
716     case ES1370_REG_SERIAL_CONTROL:
717         val = s->sctl;
718         break;
719 
720     case ES1370_REG_ADC_SCOUNT:
721         d++;
722     case ES1370_REG_DAC2_SCOUNT:
723         d++;
724     case ES1370_REG_DAC1_SCOUNT:
725         val = d->scount;
726 #ifdef DEBUG_ES1370
727         {
728             uint32_t curr_count = d->scount >> 16;
729             uint32_t count = d->scount & 0xffff;
730 
731             curr_count <<= d->shift;
732             count <<= d->shift;
733             dolog ("read scount curr %d, total %d\n", curr_count, count);
734         }
735 #endif
736         break;
737 
738     case ES1370_REG_ADC_FRAMECNT:
739         d++;
740     case ES1370_REG_DAC2_FRAMECNT:
741         d++;
742     case ES1370_REG_DAC1_FRAMECNT:
743         val = d->frame_cnt;
744 #ifdef DEBUG_ES1370
745         {
746             uint32_t size = ((d->frame_cnt & 0xffff) + 1) << 2;
747             uint32_t curr = ((d->frame_cnt >> 16) + 1) << 2;
748             if (curr > size) {
749                 dolog ("read framecnt curr %d, size %d %d\n", curr, size,
750                        curr > size);
751             }
752         }
753 #endif
754         break;
755 
756     case ES1370_REG_ADC_FRAMEADR:
757         d++;
758     case ES1370_REG_DAC2_FRAMEADR:
759         d++;
760     case ES1370_REG_DAC1_FRAMEADR:
761         val = d->frame_addr;
762         break;
763 
764     case ES1370_REG_PHANTOM_FRAMECNT:
765         val = ~0U;
766         lwarn ("reading from phantom frame count\n");
767         break;
768     case ES1370_REG_PHANTOM_FRAMEADR:
769         val = ~0U;
770         lwarn ("reading from phantom frame address\n");
771         break;
772 
773     default:
774         val = ~0U;
775         lwarn ("readl %#x -> %#x\n", addr, val);
776         break;
777     }
778     return val;
779 }
780 
781 static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel,
782                                    int max, int *irq)
783 {
784     uint8_t tmpbuf[4096];
785     uint32_t addr = d->frame_addr;
786     int sc = d->scount & 0xffff;
787     int csc = d->scount >> 16;
788     int csc_bytes = (csc + 1) << d->shift;
789     int cnt = d->frame_cnt >> 16;
790     int size = d->frame_cnt & 0xffff;
791     int left = ((size - cnt + 1) << 2) + d->leftover;
792     int transferred = 0;
793     int temp = audio_MIN (max, audio_MIN (left, csc_bytes));
794     int index = d - &s->chan[0];
795 
796     addr += (cnt << 2) + d->leftover;
797 
798     if (index == ADC_CHANNEL) {
799         while (temp) {
800             int acquired, to_copy;
801 
802             to_copy = audio_MIN ((size_t) temp, sizeof (tmpbuf));
803             acquired = AUD_read (s->adc_voice, tmpbuf, to_copy);
804             if (!acquired)
805                 break;
806 
807             pci_dma_write (&s->dev, addr, tmpbuf, acquired);
808 
809             temp -= acquired;
810             addr += acquired;
811             transferred += acquired;
812         }
813     }
814     else {
815         SWVoiceOut *voice = s->dac_voice[index];
816 
817         while (temp) {
818             int copied, to_copy;
819 
820             to_copy = audio_MIN ((size_t) temp, sizeof (tmpbuf));
821             pci_dma_read (&s->dev, addr, tmpbuf, to_copy);
822             copied = AUD_write (voice, tmpbuf, to_copy);
823             if (!copied)
824                 break;
825             temp -= copied;
826             addr += copied;
827             transferred += copied;
828         }
829     }
830 
831     if (csc_bytes == transferred) {
832         *irq = 1;
833         d->scount = sc | (sc << 16);
834         ldebug ("sc = %d, rate = %f\n",
835                 (sc + 1) << d->shift,
836                 (sc + 1) / (double) 44100);
837     }
838     else {
839         *irq = 0;
840         d->scount = sc | (((csc_bytes - transferred - 1) >> d->shift) << 16);
841     }
842 
843     cnt += (transferred + d->leftover) >> 2;
844 
845     if (s->sctl & loop_sel) {
846         /* Bah, how stupid is that having a 0 represent true value?
847            i just spent few hours on this shit */
848         AUD_log ("es1370: warning", "non looping mode\n");
849     }
850     else {
851         d->frame_cnt = size;
852 
853         if ((uint32_t) cnt <= d->frame_cnt)
854             d->frame_cnt |= cnt << 16;
855     }
856 
857     d->leftover = (transferred + d->leftover) & 3;
858 }
859 
860 static void es1370_run_channel (ES1370State *s, size_t chan, int free_or_avail)
861 {
862     uint32_t new_status = s->status;
863     int max_bytes, irq;
864     struct chan *d = &s->chan[chan];
865     const struct chan_bits *b = &es1370_chan_bits[chan];
866 
867     if (!(s->ctl & b->ctl_en) || (s->sctl & b->sctl_pause)) {
868         return;
869     }
870 
871     max_bytes = free_or_avail;
872     max_bytes &= ~((1 << d->shift) - 1);
873     if (!max_bytes) {
874         return;
875     }
876 
877     es1370_transfer_audio (s, d, b->sctl_loopsel, max_bytes, &irq);
878 
879     if (irq) {
880         if (s->sctl & b->sctl_inten) {
881             new_status |= b->stat_int;
882         }
883     }
884 
885     if (new_status != s->status) {
886         es1370_update_status (s, new_status);
887     }
888 }
889 
890 static void es1370_dac1_callback (void *opaque, int free)
891 {
892     ES1370State *s = opaque;
893 
894     es1370_run_channel (s, DAC1_CHANNEL, free);
895 }
896 
897 static void es1370_dac2_callback (void *opaque, int free)
898 {
899     ES1370State *s = opaque;
900 
901     es1370_run_channel (s, DAC2_CHANNEL, free);
902 }
903 
904 static void es1370_adc_callback (void *opaque, int avail)
905 {
906     ES1370State *s = opaque;
907 
908     es1370_run_channel (s, ADC_CHANNEL, avail);
909 }
910 
911 static uint64_t es1370_read(void *opaque, hwaddr addr,
912                             unsigned size)
913 {
914     switch (size) {
915     case 1:
916         return es1370_readb(opaque, addr);
917     case 2:
918         return es1370_readw(opaque, addr);
919     case 4:
920         return es1370_readl(opaque, addr);
921     default:
922         return -1;
923     }
924 }
925 
926 static void es1370_write(void *opaque, hwaddr addr, uint64_t val,
927                       unsigned size)
928 {
929     switch (size) {
930     case 1:
931         es1370_writeb(opaque, addr, val);
932         break;
933     case 2:
934         es1370_writew(opaque, addr, val);
935         break;
936     case 4:
937         es1370_writel(opaque, addr, val);
938         break;
939     }
940 }
941 
942 static const MemoryRegionOps es1370_io_ops = {
943     .read = es1370_read,
944     .write = es1370_write,
945     .impl = {
946         .min_access_size = 1,
947         .max_access_size = 4,
948     },
949     .endianness = DEVICE_LITTLE_ENDIAN,
950 };
951 
952 static const VMStateDescription vmstate_es1370_channel = {
953     .name = "es1370_channel",
954     .version_id = 2,
955     .minimum_version_id = 2,
956     .fields = (VMStateField[]) {
957         VMSTATE_UINT32 (shift, struct chan),
958         VMSTATE_UINT32 (leftover, struct chan),
959         VMSTATE_UINT32 (scount, struct chan),
960         VMSTATE_UINT32 (frame_addr, struct chan),
961         VMSTATE_UINT32 (frame_cnt, struct chan),
962         VMSTATE_END_OF_LIST ()
963     }
964 };
965 
966 static int es1370_post_load (void *opaque, int version_id)
967 {
968     uint32_t ctl, sctl;
969     ES1370State *s = opaque;
970     size_t i;
971 
972     for (i = 0; i < NB_CHANNELS; ++i) {
973         if (i == ADC_CHANNEL) {
974             if (s->adc_voice) {
975                 AUD_close_in (&s->card, s->adc_voice);
976                 s->adc_voice = NULL;
977             }
978         }
979         else {
980             if (s->dac_voice[i]) {
981                 AUD_close_out (&s->card, s->dac_voice[i]);
982                 s->dac_voice[i] = NULL;
983             }
984         }
985     }
986 
987     ctl = s->ctl;
988     sctl = s->sctl;
989     s->ctl = 0;
990     s->sctl = 0;
991     es1370_update_voices (s, ctl, sctl);
992     return 0;
993 }
994 
995 static const VMStateDescription vmstate_es1370 = {
996     .name = "es1370",
997     .version_id = 2,
998     .minimum_version_id = 2,
999     .post_load = es1370_post_load,
1000     .fields = (VMStateField[]) {
1001         VMSTATE_PCI_DEVICE (dev, ES1370State),
1002         VMSTATE_STRUCT_ARRAY (chan, ES1370State, NB_CHANNELS, 2,
1003                               vmstate_es1370_channel, struct chan),
1004         VMSTATE_UINT32 (ctl, ES1370State),
1005         VMSTATE_UINT32 (status, ES1370State),
1006         VMSTATE_UINT32 (mempage, ES1370State),
1007         VMSTATE_UINT32 (codec, ES1370State),
1008         VMSTATE_UINT32 (sctl, ES1370State),
1009         VMSTATE_END_OF_LIST ()
1010     }
1011 };
1012 
1013 static void es1370_on_reset(DeviceState *dev)
1014 {
1015     ES1370State *s = container_of(dev, ES1370State, dev.qdev);
1016     es1370_reset (s);
1017 }
1018 
1019 static void es1370_realize(PCIDevice *dev, Error **errp)
1020 {
1021     ES1370State *s = ES1370(dev);
1022     uint8_t *c = s->dev.config;
1023 
1024     c[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_SLOW >> 8;
1025 
1026 #if 0
1027     c[PCI_CAPABILITY_LIST] = 0xdc;
1028     c[PCI_INTERRUPT_LINE] = 10;
1029     c[0xdc] = 0x00;
1030 #endif
1031 
1032     c[PCI_INTERRUPT_PIN] = 1;
1033     c[PCI_MIN_GNT] = 0x0c;
1034     c[PCI_MAX_LAT] = 0x80;
1035 
1036     memory_region_init_io (&s->io, OBJECT(s), &es1370_io_ops, s, "es1370", 256);
1037     pci_register_bar (&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
1038 
1039     AUD_register_card ("es1370", &s->card);
1040     es1370_reset (s);
1041 }
1042 
1043 static void es1370_exit(PCIDevice *dev)
1044 {
1045     ES1370State *s = ES1370(dev);
1046     int i;
1047 
1048     for (i = 0; i < 2; ++i) {
1049         AUD_close_out(&s->card, s->dac_voice[i]);
1050     }
1051 
1052     AUD_close_in(&s->card, s->adc_voice);
1053     AUD_remove_card(&s->card);
1054 }
1055 
1056 static int es1370_init (PCIBus *bus)
1057 {
1058     pci_create_simple (bus, -1, TYPE_ES1370);
1059     return 0;
1060 }
1061 
1062 static void es1370_class_init (ObjectClass *klass, void *data)
1063 {
1064     DeviceClass *dc = DEVICE_CLASS (klass);
1065     PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
1066 
1067     k->realize = es1370_realize;
1068     k->exit = es1370_exit;
1069     k->vendor_id = PCI_VENDOR_ID_ENSONIQ;
1070     k->device_id = PCI_DEVICE_ID_ENSONIQ_ES1370;
1071     k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
1072     k->subsystem_vendor_id = 0x4942;
1073     k->subsystem_id = 0x4c4c;
1074     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
1075     dc->desc = "ENSONIQ AudioPCI ES1370";
1076     dc->vmsd = &vmstate_es1370;
1077     dc->reset = es1370_on_reset;
1078 }
1079 
1080 static const TypeInfo es1370_info = {
1081     .name          = TYPE_ES1370,
1082     .parent        = TYPE_PCI_DEVICE,
1083     .instance_size = sizeof (ES1370State),
1084     .class_init    = es1370_class_init,
1085 };
1086 
1087 static void es1370_register_types (void)
1088 {
1089     type_register_static (&es1370_info);
1090     pci_register_soundhw("es1370", "ENSONIQ AudioPCI ES1370", es1370_init);
1091 }
1092 
1093 type_init (es1370_register_types)
1094 
1095