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
30 #define MIN(a, b) ((a)>(b)?(b):(a))
31 #define LENOFA(a) ((int) (sizeof(a)/sizeof(a[0])))
33 #define DEREF(x) (void)x
34 #define log(...) fprintf (stderr, "sb16: " __VA_ARGS__)
35 #define Fail(...) do { \
36 fprintf (stderr, "sb16: " __VA_ARGS__); \
40 /* #define DEBUG_SB16 */
42 #define lwarn(...) fprintf (stderr, "sb16: " __VA_ARGS__)
43 #define linfo(...) fprintf (stderr, "sb16: " __VA_ARGS__)
44 #define ldebug(...) fprintf (stderr, "sb16: " __VA_ARGS__)
51 #define IO_READ_PROTO(name) \
52 uint32_t name (struct CPUState *env, uint32_t nport)
53 #define IO_WRITE_PROTO(name) \
54 void name (struct CPUState *env, uint32_t nport, uint32_t val)
64 } sb = {5, 4, 5, 1, 5, 0x220, -1};
66 static int mix_block, noirq;
100 static void log_dsp (const char *cap)
104 linfo ("%c:%c:%d:%c:dmabuf=%d:pos=%d:freq=%d:timeconst=%d:speaker=%d\n",
105 dsp.fmt_stereo ? 'S' : 'M',
106 dsp.fmt_signed ? 'S' : 'U',
108 dsp.dma_auto ? 'a' : 's',
116 static void control (int hold)
118 linfo ("%d high %d\n", hold, dsp.use_hdma);
121 DMA_hold_DREQ (sb.hdma);
123 DMA_hold_DREQ (sb.dma);
127 DMA_release_DREQ (sb.hdma);
129 DMA_release_DREQ (sb.dma);
133 static void dma_cmd (uint8_t cmd, uint8_t d0, int dma_len)
138 dsp.use_hdma = cmd < 0xc0;
139 dsp.fifo = (cmd >> 1) & 1;
140 dsp.dma_auto = (cmd >> 2) & 1;
152 dsp.fmt_signed = (d0 >> 4) & 1;
153 dsp.fmt_stereo = (d0 >> 5) & 1;
155 if (-1 != dsp.time_const) {
158 tmp = 256 - dsp.time_const;
159 dsp.freq = (1000000 + (tmp / 2)) / tmp;
161 bps = 1 << (16 == dsp.fmt_bits);
164 dsp.dma_buffer_size = (dma_len + 1) * bps;
166 linfo ("frequency %d, stereo %d, signed %d, bits %d, size %d, auto %d\n",
167 dsp.freq, dsp.fmt_stereo, dsp.fmt_signed, dsp.fmt_bits,
168 dsp.dma_buffer_size, dsp.dma_auto);
170 if (16 == dsp.fmt_bits) {
171 if (dsp.fmt_signed) {
179 if (dsp.fmt_signed) {
188 dsp.left_till_irq = dsp.dma_buffer_size;
191 mix_block = sb.mix_block;
196 align = bps << dsp.fmt_stereo;
197 mix_block = ((dsp.freq * align) / 100) & ~(align - 1);
200 AUD_reset (dsp.freq, 1 << dsp.fmt_stereo, fmt);
205 static void command (uint8_t cmd)
211 linfo ("%#x\n", cmd);
213 if (cmd > 0xaf && cmd < 0xd0) {
225 dsp.needed_bytes = 3;
232 /* IMS uses those when probing for sound devices */
236 dsp.needed_bytes = 1;
240 dsp.needed_bytes = 2;
241 dsp.dma_buffer_size = 0;
245 dsp.out_data[dsp.out_data_len++] = 0xff;
249 lwarn ("MIDI commands not implemented\n");
255 dsp.needed_bytes = 1;
262 dsp.needed_bytes = 2;
265 case 0x47: /* Continue Auto-Initialize DMA 16bit */
269 dsp.needed_bytes = 2;
272 case 0x27: /* ????????? */
286 if (dsp.fmt_signed) d0 |= 16;
287 if (dsp.fmt_stereo) d0 |= 32;
288 dma_cmd (cmd == 0x90 ? 0xc4 : 0xc0, d0, -1);
328 dsp.needed_bytes = 1;
332 dsp.out_data[dsp.out_data_len++] = sb.ver_lo;
333 dsp.out_data[dsp.out_data_len++] = sb.ver_hi;
337 dsp.out_data[dsp.out_data_len++] = 0xaa;
338 mixer.regs[0x82] |= mixer.regs[0x80];
339 pic_set_irq (sb.irq, 1);
351 Fail ("%#x %s", cmd, msg);
355 static void complete (void)
357 linfo ("complete command %#x, in_index %d, needed_bytes %d\n",
358 dsp.cmd, dsp.in_index, dsp.needed_bytes);
360 if (dsp.cmd > 0xaf && dsp.cmd < 0xd0) {
367 ldebug ("d0 = %d, d1 = %d, d2 = %d\n",
369 dma_cmd (dsp.cmd, d0, d1 + (d2 << 8));
386 save_left = dsp.left_till_irq;
387 save_pos = dsp.dma_pos;
388 dma_cmd (0xc0, 0, d0 + (d1 << 8));
389 dsp.left_till_irq = save_left;
390 dsp.dma_pos = save_pos;
392 linfo ("set buffer size data[%d, %d] %d pos %d\n",
393 d0, d1, dsp.dma_buffer_size, dsp.dma_pos);
398 dsp.time_const = dsp.in_data[0];
399 linfo ("set time const %d\n", dsp.time_const);
404 dsp.freq = dsp.in_data[1] + (dsp.in_data[0] << 8);
405 linfo ("set freq %#x, %#x = %d\n",
406 dsp.in_data[1], dsp.in_data[0], dsp.freq);
410 dsp.dma_buffer_size = dsp.in_data[1] + (dsp.in_data[0] << 8);
411 linfo ("set dma len %#x, %#x = %d\n",
412 dsp.in_data[1], dsp.in_data[0], dsp.dma_buffer_size);
416 dsp.out_data_len = 1;
417 linfo ("data = %#x\n", dsp.in_data[0]);
418 dsp.out_data[0] = dsp.in_data[0] ^ 0xff;
430 Fail ("unrecognized command %#x", dsp.cmd);
433 static IO_WRITE_PROTO (dsp_write)
437 iport = nport - sb.port;
443 else if ((1 == val) && (0 == dsp.v2x6)) {
445 dsp.out_data[dsp.out_data_len++] = 0xaa;
451 case 0xc: /* write data or command | write status */
452 if (0 == dsp.needed_bytes) {
454 if (0 == dsp.needed_bytes) {
459 dsp.in_data[dsp.in_index++] = val;
460 if (dsp.in_index == dsp.needed_bytes) {
461 dsp.needed_bytes = 0;
470 Fail ("(nport=%#x, val=%#x)", nport, val);
474 static IO_READ_PROTO (dsp_read)
480 iport = nport - sb.port;
484 case 0x6: /* reset */
487 case 0xa: /* read data */
488 if (dsp.out_data_len) {
489 retval = dsp.out_data[--dsp.out_data_len];
493 lwarn ("empty output buffer\n");
496 msg = "empty output buffer";
502 case 0xc: /* 0 can write */
506 case 0xd: /* timer interrupt clear */
509 case 0xe: /* data available status | irq 8 ack */
510 /* XXX drop pic irq line here? */
512 retval = (0 == dsp.out_data_len) ? 0 : 0x80;
513 mixer.regs[0x82] &= ~mixer.regs[0x80];
514 pic_set_irq (sb.irq, 0);
517 case 0xf: /* irq 16 ack */
518 /* XXX drop pic irq line here? */
521 mixer.regs[0x82] &= ~mixer.regs[0x80];
522 pic_set_irq (sb.irq, 0);
529 if ((0xc != iport) && (0xe != iport)) {
530 ldebug ("nport=%#x iport %#x = %#x\n",
531 nport, iport, retval);
537 Fail ("(nport=%#x) %s", nport, msg);
540 static IO_WRITE_PROTO(mixer_write_indexb)
542 mixer.nreg = val & 0xff;
545 static IO_WRITE_PROTO(mixer_write_datab)
547 mixer.regs[mixer.nreg] = val;
550 static IO_WRITE_PROTO(mixer_write_indexw)
552 mixer_write_indexb (env, nport, val & 0xff);
553 mixer_write_datab (env, nport, (val >> 8) & 0xff);
556 static IO_READ_PROTO(mixer_read)
558 return mixer.regs[mixer.nreg];
563 if (0 == dsp.speaker)
569 static int write_audio (uint32_t addr, int len, int size)
582 left_till_end = len - dsp.dma_pos;
584 to_copy = MIN (temp, left_till_end);
586 copied = AUD_write ((void *) (addr + dsp.dma_pos), to_copy);
589 dsp.dma_pos += copied;
591 if (dsp.dma_pos == len) {
597 if (copied != to_copy)
604 static int SB_read_DMA (uint32_t addr, int size, int *_irq)
606 int free, till, copy, written;
608 if (0 == dsp.speaker)
611 if (dsp.left_till_irq < 0) {
612 dsp.left_till_irq += dsp.dma_buffer_size;
616 free = AUD_get_free ();
618 if ((free <= 0) || (0 == size)) {
623 copy = MIN (free, mix_block);
629 till = dsp.left_till_irq;
631 ldebug ("addr:%#010x free:%d till:%d size:%d\n",
632 addr, free, till, size);
634 if (0 == dsp.dma_auto) {
639 written = write_audio (addr, size, copy);
640 dsp.left_till_irq -= written;
641 AUD_adjust_estimate (free - written);
643 if (dsp.left_till_irq <= 0) {
644 mixer.regs[0x82] |= mixer.regs[0x80];
646 ldebug ("request irq\n");
650 if (0 == dsp.dma_auto) {
655 ldebug ("pos %5d free %5d size %5d till % 5d copy %5d dma size %5d\n",
656 dsp.dma_pos, free, size, dsp.left_till_irq, copy,
657 dsp.dma_buffer_size);
659 if (dsp.left_till_irq <= 0) {
660 dsp.left_till_irq += dsp.dma_buffer_size;
666 static int dma_misc_handler (int moo)
671 static int magic_of_irq (int irq)
683 log ("bad irq %d\n", irq);
688 static int irq_of_magic (int magic)
700 log ("bad irq magic %d\n", magic);
705 void SB16_init (void)
708 static const uint8_t dsp_write_ports[] = {0x6, 0xc};
709 static const uint8_t dsp_read_ports[] = {0x6, 0xa, 0xc, 0xd, 0xe, 0xf};
711 mixer.regs[0x0e] = ~0;
712 mixer.regs[0x80] = magic_of_irq (sb.irq);
713 mixer.regs[0x81] = 0x20 | (sb.dma << 1);
715 DEREF (irq_of_magic);
717 for (i = 0x30; i < 0x48; i++) {
718 mixer.regs[i] = 0x20;
721 for (i = 0; i < LENOFA (dsp_write_ports); i++) {
722 register_ioport_write (sb.port + dsp_write_ports[i], 1, dsp_write, 1);
725 for (i = 0; i < LENOFA (dsp_read_ports); i++) {
726 register_ioport_read (sb.port + dsp_read_ports[i], 1, dsp_read, 1);
729 register_ioport_write (sb.port + 0x4, 1, mixer_write_indexb, 1);
730 register_ioport_write (sb.port + 0x4, 1, mixer_write_indexw, 2);
731 register_ioport_read (sb.port + 0x5, 1, mixer_read, 1);
732 register_ioport_write (sb.port + 0x5, 1, mixer_write_datab, 1);
734 DMA_register_channel (sb.hdma, SB_read_DMA, dma_misc_handler);
735 DMA_register_channel (sb.dma, SB_read_DMA, dma_misc_handler);