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
31 #define MIN(a, b) ((a)>(b)?(b):(a))
32 #define LENOFA(a) ((int) (sizeof(a)/sizeof(a[0])))
34 #define DEREF(x) (void)x
35 #define log(...) fprintf (stderr, "sb16: " __VA_ARGS__)
36 #define Fail(...) do { \
37 fprintf (stderr, "sb16: " __VA_ARGS__); \
41 /* #define DEBUG_SB16 */
43 #define lwarn(...) fprintf (stderr, "sb16: " __VA_ARGS__)
44 #define linfo(...) fprintf (stderr, "sb16: " __VA_ARGS__)
45 #define ldebug(...) fprintf (stderr, "sb16: " __VA_ARGS__)
52 #define IO_READ_PROTO(name) \
53 uint32_t name (void *opaque, uint32_t nport)
54 #define IO_WRITE_PROTO(name) \
55 void name (void *opaque, uint32_t nport, uint32_t val)
65 } sb = {5, 4, 5, 1, 5, 0x220, -1};
67 static int mix_block, noirq;
101 static void log_dsp (const char *cap)
105 linfo ("%c:%c:%d:%c:dmabuf=%d:pos=%d:freq=%d:timeconst=%d:speaker=%d\n",
106 dsp.fmt_stereo ? 'S' : 'M',
107 dsp.fmt_signed ? 'S' : 'U',
109 dsp.dma_auto ? 'a' : 's',
117 static void control (int hold)
119 linfo ("%d high %d\n", hold, dsp.use_hdma);
122 DMA_hold_DREQ (sb.hdma);
124 DMA_hold_DREQ (sb.dma);
128 DMA_release_DREQ (sb.hdma);
130 DMA_release_DREQ (sb.dma);
134 static void dma_cmd (uint8_t cmd, uint8_t d0, int dma_len)
139 dsp.use_hdma = cmd < 0xc0;
140 dsp.fifo = (cmd >> 1) & 1;
141 dsp.dma_auto = (cmd >> 2) & 1;
153 dsp.fmt_signed = (d0 >> 4) & 1;
154 dsp.fmt_stereo = (d0 >> 5) & 1;
156 if (-1 != dsp.time_const) {
159 tmp = 256 - dsp.time_const;
160 dsp.freq = (1000000 + (tmp / 2)) / tmp;
162 bps = 1 << (16 == dsp.fmt_bits);
165 dsp.dma_buffer_size = (dma_len + 1) * bps;
167 linfo ("frequency %d, stereo %d, signed %d, bits %d, size %d, auto %d\n",
168 dsp.freq, dsp.fmt_stereo, dsp.fmt_signed, dsp.fmt_bits,
169 dsp.dma_buffer_size, dsp.dma_auto);
171 if (16 == dsp.fmt_bits) {
172 if (dsp.fmt_signed) {
180 if (dsp.fmt_signed) {
189 dsp.left_till_irq = dsp.dma_buffer_size;
192 mix_block = sb.mix_block;
197 align = bps << dsp.fmt_stereo;
198 mix_block = ((dsp.freq * align) / 100) & ~(align - 1);
201 AUD_reset (dsp.freq, 1 << dsp.fmt_stereo, fmt);
206 static void command (uint8_t cmd)
212 linfo ("%#x\n", cmd);
214 if (cmd > 0xaf && cmd < 0xd0) {
226 dsp.needed_bytes = 3;
233 /* IMS uses those when probing for sound devices */
237 dsp.needed_bytes = 1;
241 dsp.needed_bytes = 2;
242 dsp.dma_buffer_size = 0;
246 dsp.out_data[dsp.out_data_len++] = 0xff;
250 lwarn ("MIDI commands not implemented\n");
256 dsp.needed_bytes = 1;
263 dsp.needed_bytes = 2;
266 case 0x47: /* Continue Auto-Initialize DMA 16bit */
270 dsp.needed_bytes = 2;
273 case 0x27: /* ????????? */
287 if (dsp.fmt_signed) d0 |= 16;
288 if (dsp.fmt_stereo) d0 |= 32;
289 dma_cmd (cmd == 0x90 ? 0xc4 : 0xc0, d0, -1);
329 dsp.needed_bytes = 1;
333 dsp.out_data[dsp.out_data_len++] = sb.ver_lo;
334 dsp.out_data[dsp.out_data_len++] = sb.ver_hi;
338 dsp.out_data[dsp.out_data_len++] = 0xaa;
339 mixer.regs[0x82] |= mixer.regs[0x80];
340 pic_set_irq (sb.irq, 1);
352 Fail ("%#x %s", cmd, msg);
356 static void complete (void)
358 linfo ("complete command %#x, in_index %d, needed_bytes %d\n",
359 dsp.cmd, dsp.in_index, dsp.needed_bytes);
361 if (dsp.cmd > 0xaf && dsp.cmd < 0xd0) {
368 ldebug ("d0 = %d, d1 = %d, d2 = %d\n",
370 dma_cmd (dsp.cmd, d0, d1 + (d2 << 8));
387 save_left = dsp.left_till_irq;
388 save_pos = dsp.dma_pos;
389 dma_cmd (0xc0, 0, d0 + (d1 << 8));
390 dsp.left_till_irq = save_left;
391 dsp.dma_pos = save_pos;
393 linfo ("set buffer size data[%d, %d] %d pos %d\n",
394 d0, d1, dsp.dma_buffer_size, dsp.dma_pos);
399 dsp.time_const = dsp.in_data[0];
400 linfo ("set time const %d\n", dsp.time_const);
405 dsp.freq = dsp.in_data[1] + (dsp.in_data[0] << 8);
406 linfo ("set freq %#x, %#x = %d\n",
407 dsp.in_data[1], dsp.in_data[0], dsp.freq);
411 dsp.dma_buffer_size = dsp.in_data[1] + (dsp.in_data[0] << 8);
412 linfo ("set dma len %#x, %#x = %d\n",
413 dsp.in_data[1], dsp.in_data[0], dsp.dma_buffer_size);
417 dsp.out_data_len = 1;
418 linfo ("data = %#x\n", dsp.in_data[0]);
419 dsp.out_data[0] = dsp.in_data[0] ^ 0xff;
431 Fail ("unrecognized command %#x", dsp.cmd);
434 static IO_WRITE_PROTO (dsp_write)
438 iport = nport - sb.port;
444 else if ((1 == val) && (0 == dsp.v2x6)) {
446 dsp.out_data[dsp.out_data_len++] = 0xaa;
452 case 0xc: /* write data or command | write status */
453 if (0 == dsp.needed_bytes) {
455 if (0 == dsp.needed_bytes) {
460 dsp.in_data[dsp.in_index++] = val;
461 if (dsp.in_index == dsp.needed_bytes) {
462 dsp.needed_bytes = 0;
471 Fail ("(nport=%#x, val=%#x)", nport, val);
475 static IO_READ_PROTO (dsp_read)
481 iport = nport - sb.port;
485 case 0x6: /* reset */
488 case 0xa: /* read data */
489 if (dsp.out_data_len) {
490 retval = dsp.out_data[--dsp.out_data_len];
494 lwarn ("empty output buffer\n");
497 msg = "empty output buffer";
503 case 0xc: /* 0 can write */
507 case 0xd: /* timer interrupt clear */
510 case 0xe: /* data available status | irq 8 ack */
511 /* XXX drop pic irq line here? */
513 retval = (0 == dsp.out_data_len) ? 0 : 0x80;
514 mixer.regs[0x82] &= ~mixer.regs[0x80];
515 pic_set_irq (sb.irq, 0);
518 case 0xf: /* irq 16 ack */
519 /* XXX drop pic irq line here? */
522 mixer.regs[0x82] &= ~mixer.regs[0x80];
523 pic_set_irq (sb.irq, 0);
530 if ((0xc != iport) && (0xe != iport)) {
531 ldebug ("nport=%#x iport %#x = %#x\n",
532 nport, iport, retval);
538 Fail ("(nport=%#x) %s", nport, msg);
541 static IO_WRITE_PROTO(mixer_write_indexb)
543 mixer.nreg = val & 0xff;
546 static IO_WRITE_PROTO(mixer_write_datab)
548 mixer.regs[mixer.nreg] = val;
551 static IO_WRITE_PROTO(mixer_write_indexw)
553 mixer_write_indexb (opaque, nport, val & 0xff);
554 mixer_write_datab (opaque, nport, (val >> 8) & 0xff);
557 static IO_READ_PROTO(mixer_read)
559 return mixer.regs[mixer.nreg];
564 if (0 == dsp.speaker)
570 static int write_audio (uint32_t addr, int len, int size)
573 uint8_t tmpbuf[4096];
584 left_till_end = len - dsp.dma_pos;
586 to_copy = MIN (temp, left_till_end);
587 if (to_copy > sizeof(tmpbuf))
588 to_copy = sizeof(tmpbuf);
589 cpu_physical_memory_read(addr + dsp.dma_pos, tmpbuf, to_copy);
590 copied = AUD_write (tmpbuf, to_copy);
593 dsp.dma_pos += copied;
595 if (dsp.dma_pos == len) {
601 if (copied != to_copy)
608 static int SB_read_DMA (void *opaque, target_ulong addr, int size)
610 int free, till, copy, written;
612 if (0 == dsp.speaker)
615 if (dsp.left_till_irq < 0) {
616 dsp.left_till_irq += dsp.dma_buffer_size;
620 free = AUD_get_free ();
622 if ((free <= 0) || (0 == size)) {
627 copy = MIN (free, mix_block);
633 till = dsp.left_till_irq;
635 ldebug ("addr:%#010x free:%d till:%d size:%d\n",
636 addr, free, till, size);
638 if (0 == dsp.dma_auto) {
643 written = write_audio (addr, size, copy);
644 dsp.left_till_irq -= written;
645 AUD_adjust_estimate (free - written);
647 if (dsp.left_till_irq <= 0) {
648 mixer.regs[0x82] |= mixer.regs[0x80];
650 ldebug ("request irq\n");
651 pic_set_irq(sb.irq, 1);
654 if (0 == dsp.dma_auto) {
659 ldebug ("pos %5d free %5d size %5d till % 5d copy %5d dma size %5d\n",
660 dsp.dma_pos, free, size, dsp.left_till_irq, copy,
661 dsp.dma_buffer_size);
663 if (dsp.left_till_irq <= 0) {
664 dsp.left_till_irq += dsp.dma_buffer_size;
670 static int magic_of_irq (int irq)
682 log ("bad irq %d\n", irq);
687 static int irq_of_magic (int magic)
699 log ("bad irq magic %d\n", magic);
704 void SB16_init (void)
707 static const uint8_t dsp_write_ports[] = {0x6, 0xc};
708 static const uint8_t dsp_read_ports[] = {0x6, 0xa, 0xc, 0xd, 0xe, 0xf};
710 mixer.regs[0x0e] = ~0;
711 mixer.regs[0x80] = magic_of_irq (sb.irq);
712 mixer.regs[0x81] = 0x20 | (sb.dma << 1);
714 DEREF (irq_of_magic);
716 for (i = 0x30; i < 0x48; i++) {
717 mixer.regs[i] = 0x20;
720 for (i = 0; i < LENOFA (dsp_write_ports); i++) {
721 register_ioport_write (sb.port + dsp_write_ports[i], 1, 1, dsp_write, NULL);
724 for (i = 0; i < LENOFA (dsp_read_ports); i++) {
725 register_ioport_read (sb.port + dsp_read_ports[i], 1, 1, dsp_read, NULL);
728 register_ioport_write (sb.port + 0x4, 1, 1, mixer_write_indexb, NULL);
729 register_ioport_write (sb.port + 0x4, 1, 2, mixer_write_indexw, NULL);
730 register_ioport_read (sb.port + 0x5, 1, 1, mixer_read, NULL);
731 register_ioport_write (sb.port + 0x5, 1, 1, mixer_write_datab, NULL);
733 DMA_register_channel (sb.hdma, SB_read_DMA, NULL);
734 DMA_register_channel (sb.dma, SB_read_DMA, NULL);