2 * QEMU Soundblaster 16 emulation
4 * Copyright (c) 2003 Vassili Karpov (malc)
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
26 #define MIN(a, b) ((a)>(b)?(b):(a))
27 #define LENOFA(a) ((int) (sizeof(a)/sizeof(a[0])))
29 #define log(...) fprintf (stderr, "sb16: " __VA_ARGS__)
31 /* #define DEBUG_SB16 */
33 #define lwarn(...) fprintf (stderr, "sb16: " __VA_ARGS__)
34 #define linfo(...) fprintf (stderr, "sb16: " __VA_ARGS__)
35 #define ldebug(...) fprintf (stderr, "sb16: " __VA_ARGS__)
42 #define IO_READ_PROTO(name) \
43 uint32_t name (void *opaque, uint32_t nport)
44 #define IO_WRITE_PROTO(name) \
45 void name (void *opaque, uint32_t nport, uint32_t val)
55 } sb = {5, 4, 5, 1, 5, 0x220, -1};
57 static int mix_block, noirq;
59 typedef struct SB16State {
85 uint8_t mixer_regs[256];
88 /* XXX: suppress that and use a context */
89 static struct SB16State dsp;
91 static void log_dsp (SB16State *dsp)
93 linfo ("%c:%c:%d:%c:dmabuf=%d:pos=%d:freq=%d:timeconst=%d:speaker=%d\n",
94 dsp->fmt_stereo ? 'S' : 'M',
95 dsp->fmt_signed ? 'S' : 'U',
97 dsp->dma_auto ? 'a' : 's',
105 static void control (int hold)
107 linfo ("%d high %d\n", hold, dsp.use_hdma);
110 DMA_hold_DREQ (sb.hdma);
112 DMA_hold_DREQ (sb.dma);
116 DMA_release_DREQ (sb.hdma);
118 DMA_release_DREQ (sb.dma);
122 static void dma_cmd (uint8_t cmd, uint8_t d0, int dma_len)
127 dsp.use_hdma = cmd < 0xc0;
128 dsp.fifo = (cmd >> 1) & 1;
129 dsp.dma_auto = (cmd >> 2) & 1;
141 dsp.fmt_signed = (d0 >> 4) & 1;
142 dsp.fmt_stereo = (d0 >> 5) & 1;
144 if (-1 != dsp.time_const) {
147 tmp = 256 - dsp.time_const;
148 dsp.freq = (1000000 + (tmp / 2)) / tmp;
150 bps = 1 << (16 == dsp.fmt_bits);
153 dsp.dma_buffer_size = (dma_len + 1) * bps;
155 linfo ("frequency %d, stereo %d, signed %d, bits %d, size %d, auto %d\n",
156 dsp.freq, dsp.fmt_stereo, dsp.fmt_signed, dsp.fmt_bits,
157 dsp.dma_buffer_size, dsp.dma_auto);
159 if (16 == dsp.fmt_bits) {
160 if (dsp.fmt_signed) {
168 if (dsp.fmt_signed) {
177 dsp.left_till_irq = dsp.dma_buffer_size;
180 mix_block = sb.mix_block;
185 align = bps << dsp.fmt_stereo;
186 mix_block = ((dsp.freq * align) / 100) & ~(align - 1);
189 AUD_reset (dsp.freq, 1 << dsp.fmt_stereo, fmt);
194 static inline void dsp_out_data(SB16State *dsp, int val)
196 if (dsp->out_data_len < sizeof(dsp->out_data))
197 dsp->out_data[dsp->out_data_len++] = val;
200 static void command (SB16State *dsp, uint8_t cmd)
202 linfo ("%#x\n", cmd);
204 if (cmd > 0xaf && cmd < 0xd0) {
213 log("%#x wrong bits", cmd);
216 dsp->needed_bytes = 3;
223 /* IMS uses those when probing for sound devices */
227 dsp->needed_bytes = 1;
231 dsp->needed_bytes = 2;
232 dsp->dma_buffer_size = 0;
236 dsp_out_data(dsp, 0xff);
240 lwarn ("MIDI commands not implemented\n");
245 dsp->time_const = -1;
246 dsp->needed_bytes = 1;
252 dsp->time_const = -1;
253 dsp->needed_bytes = 2;
256 case 0x47: /* Continue Auto-Initialize DMA 16bit */
260 dsp->needed_bytes = 2;
263 case 0x27: /* ????????? */
277 if (dsp->fmt_signed) d0 |= 16;
278 if (dsp->fmt_stereo) d0 |= 32;
279 dma_cmd (cmd == 0x90 ? 0xc4 : 0xc0, d0, -1);
319 dsp->needed_bytes = 1;
323 dsp_out_data(dsp, sb.ver_lo);
324 dsp_out_data(dsp, sb.ver_hi);
328 dsp_out_data(dsp, 0xaa);
329 dsp->mixer_regs[0x82] |= dsp->mixer_regs[0x80];
330 pic_set_irq (sb.irq, 1);
334 log("%#x is unknown", cmd);
345 static void complete (SB16State *dsp)
347 linfo ("complete command %#x, in_index %d, needed_bytes %d\n",
348 dsp->cmd, dsp->in_index, dsp->needed_bytes);
350 if (dsp->cmd > 0xaf && dsp->cmd < 0xd0) {
353 d0 = dsp->in_data[0];
354 d1 = dsp->in_data[1];
355 d2 = dsp->in_data[2];
357 ldebug ("d0 = %d, d1 = %d, d2 = %d\n",
359 dma_cmd (dsp->cmd, d0, d1 + (d2 << 8));
373 d0 = dsp->in_data[0];
374 d1 = dsp->in_data[1];
376 save_left = dsp->left_till_irq;
377 save_pos = dsp->dma_pos;
378 dma_cmd (0xc0, 0, d0 + (d1 << 8));
379 dsp->left_till_irq = save_left;
380 dsp->dma_pos = save_pos;
382 linfo ("set buffer size data[%d, %d] %d pos %d\n",
383 d0, d1, dsp->dma_buffer_size, dsp->dma_pos);
388 dsp->time_const = dsp->in_data[0];
389 linfo ("set time const %d\n", dsp->time_const);
394 dsp->freq = dsp->in_data[1] + (dsp->in_data[0] << 8);
395 linfo ("set freq %#x, %#x = %d\n",
396 dsp->in_data[1], dsp->in_data[0], dsp->freq);
400 dsp->dma_buffer_size = dsp->in_data[1] + (dsp->in_data[0] << 8);
401 linfo ("set dma len %#x, %#x = %d\n",
402 dsp->in_data[1], dsp->in_data[0], dsp->dma_buffer_size);
406 dsp->out_data_len = 0;
407 linfo ("data = %#x\n", dsp->in_data[0]);
408 dsp_out_data(dsp, dsp->in_data[0] ^ 0xff);
412 log ("unrecognized command %#x", dsp->cmd);
421 static IO_WRITE_PROTO (dsp_write)
423 SB16State *dsp = opaque;
426 iport = nport - sb.port;
432 else if ((1 == val) && (0 == dsp->v2x6)) {
434 dsp_out_data(dsp, 0xaa);
440 case 0xc: /* write data or command | write status */
441 if (0 == dsp->needed_bytes) {
443 if (0 == dsp->needed_bytes) {
448 dsp->in_data[dsp->in_index++] = val;
449 if (dsp->in_index == dsp->needed_bytes) {
450 dsp->needed_bytes = 0;
459 log ("(nport=%#x, val=%#x)", nport, val);
464 static IO_READ_PROTO (dsp_read)
466 SB16State *dsp = opaque;
469 iport = nport - sb.port;
473 case 0x6: /* reset */
476 case 0xa: /* read data */
477 if (dsp->out_data_len) {
478 retval = dsp->out_data[--dsp->out_data_len];
480 log("empty output buffer\n");
485 case 0xc: /* 0 can write */
489 case 0xd: /* timer interrupt clear */
490 log("timer interrupt clear\n");
493 case 0xe: /* data available status | irq 8 ack */
494 /* XXX drop pic irq line here? */
496 retval = (0 == dsp->out_data_len) ? 0 : 0x80;
497 dsp->mixer_regs[0x82] &= ~dsp->mixer_regs[0x80];
498 pic_set_irq (sb.irq, 0);
501 case 0xf: /* irq 16 ack */
502 /* XXX drop pic irq line here? */
505 dsp->mixer_regs[0x82] &= ~dsp->mixer_regs[0x80];
506 pic_set_irq (sb.irq, 0);
513 if ((0xc != iport) && (0xe != iport)) {
514 ldebug ("nport=%#x iport %#x = %#x\n",
515 nport, iport, retval);
524 static IO_WRITE_PROTO(mixer_write_indexb)
526 SB16State *dsp = opaque;
527 dsp->mixer_nreg = val;
530 static IO_WRITE_PROTO(mixer_write_datab)
532 SB16State *dsp = opaque;
534 if (dsp->mixer_nreg > 0x83)
536 dsp->mixer_regs[dsp->mixer_nreg] = val;
539 static IO_WRITE_PROTO(mixer_write_indexw)
541 mixer_write_indexb (opaque, nport, val & 0xff);
542 mixer_write_datab (opaque, nport, (val >> 8) & 0xff);
545 static IO_READ_PROTO(mixer_read)
547 SB16State *dsp = opaque;
548 return dsp->mixer_regs[dsp->mixer_nreg];
553 if (0 == dsp.speaker)
559 static int write_audio (uint32_t addr, int len, int size)
562 uint8_t tmpbuf[4096];
573 left_till_end = len - dsp.dma_pos;
575 to_copy = MIN (temp, left_till_end);
576 if (to_copy > sizeof(tmpbuf))
577 to_copy = sizeof(tmpbuf);
578 cpu_physical_memory_read(addr + dsp.dma_pos, tmpbuf, to_copy);
579 copied = AUD_write (tmpbuf, to_copy);
582 dsp.dma_pos += copied;
584 if (dsp.dma_pos == len) {
590 if (copied != to_copy)
597 static int SB_read_DMA (void *opaque, target_ulong addr, int size)
599 SB16State *dsp = opaque;
600 int free, till, copy, written;
602 if (0 == dsp->speaker)
605 if (dsp->left_till_irq < 0) {
606 dsp->left_till_irq += dsp->dma_buffer_size;
610 free = AUD_get_free ();
612 if ((free <= 0) || (0 == size)) {
617 copy = MIN (free, mix_block);
623 till = dsp->left_till_irq;
625 ldebug ("addr:%#010x free:%d till:%d size:%d\n",
626 addr, free, till, size);
628 if (0 == dsp->dma_auto) {
633 written = write_audio (addr, size, copy);
634 dsp->left_till_irq -= written;
635 AUD_adjust_estimate (free - written);
637 if (dsp->left_till_irq <= 0) {
638 dsp->mixer_regs[0x82] |= dsp->mixer_regs[0x80];
640 ldebug ("request irq\n");
641 pic_set_irq(sb.irq, 1);
644 if (0 == dsp->dma_auto) {
649 ldebug ("pos %5d free %5d size %5d till % 5d copy %5d dma size %5d\n",
650 dsp->dma_pos, free, size, dsp->left_till_irq, copy,
651 dsp->dma_buffer_size);
653 if (dsp->left_till_irq <= 0) {
654 dsp->left_till_irq += dsp->dma_buffer_size;
660 static int magic_of_irq (int irq)
672 log ("bad irq %d\n", irq);
678 static int irq_of_magic (int magic)
690 log ("bad irq magic %d\n", magic);
696 void SB16_init (void)
700 static const uint8_t dsp_write_ports[] = {0x6, 0xc};
701 static const uint8_t dsp_read_ports[] = {0x6, 0xa, 0xc, 0xd, 0xe, 0xf};
703 memset(s->mixer_regs, 0xff, sizeof(s->mixer_regs));
705 s->mixer_regs[0x0e] = ~0;
706 s->mixer_regs[0x80] = magic_of_irq (sb.irq);
707 s->mixer_regs[0x81] = 0x20 | (sb.dma << 1);
709 for (i = 0x30; i < 0x48; i++) {
710 s->mixer_regs[i] = 0x20;
713 for (i = 0; i < LENOFA (dsp_write_ports); i++) {
714 register_ioport_write (sb.port + dsp_write_ports[i], 1, 1, dsp_write, s);
717 for (i = 0; i < LENOFA (dsp_read_ports); i++) {
718 register_ioport_read (sb.port + dsp_read_ports[i], 1, 1, dsp_read, s);
721 register_ioport_write (sb.port + 0x4, 1, 1, mixer_write_indexb, s);
722 register_ioport_write (sb.port + 0x4, 1, 2, mixer_write_indexw, s);
723 register_ioport_read (sb.port + 0x5, 1, 1, mixer_read, s);
724 register_ioport_write (sb.port + 0x5, 1, 1, mixer_write_datab, s);
726 DMA_register_channel (sb.hdma, SB_read_DMA, s);
727 DMA_register_channel (sb.dma, SB_read_DMA, s);