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-rw-r--r--hw/audio/sb16.c1424
1 files changed, 1424 insertions, 0 deletions
diff --git a/hw/audio/sb16.c b/hw/audio/sb16.c
new file mode 100644
index 0000000000..783b6b4351
--- /dev/null
+++ b/hw/audio/sb16.c
@@ -0,0 +1,1424 @@
+/*
+ * QEMU Soundblaster 16 emulation
+ *
+ * Copyright (c) 2003-2005 Vassili Karpov (malc)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw/hw.h"
+#include "hw/audio/audio.h"
+#include "audio/audio.h"
+#include "hw/isa/isa.h"
+#include "hw/qdev.h"
+#include "qemu/timer.h"
+#include "qemu/host-utils.h"
+
+#define dolog(...) AUD_log ("sb16", __VA_ARGS__)
+
+/* #define DEBUG */
+/* #define DEBUG_SB16_MOST */
+
+#ifdef DEBUG
+#define ldebug(...) dolog (__VA_ARGS__)
+#else
+#define ldebug(...)
+#endif
+
+#define IO_READ_PROTO(name) \
+ uint32_t name (void *opaque, uint32_t nport)
+#define IO_WRITE_PROTO(name) \
+ void name (void *opaque, uint32_t nport, uint32_t val)
+
+static const char e3[] = "COPYRIGHT (C) CREATIVE TECHNOLOGY LTD, 1992.";
+
+typedef struct SB16State {
+ ISADevice dev;
+ QEMUSoundCard card;
+ qemu_irq pic;
+ uint32_t irq;
+ uint32_t dma;
+ uint32_t hdma;
+ uint32_t port;
+ uint32_t ver;
+
+ int in_index;
+ int out_data_len;
+ int fmt_stereo;
+ int fmt_signed;
+ int fmt_bits;
+ audfmt_e fmt;
+ int dma_auto;
+ int block_size;
+ int fifo;
+ int freq;
+ int time_const;
+ int speaker;
+ int needed_bytes;
+ int cmd;
+ int use_hdma;
+ int highspeed;
+ int can_write;
+
+ int v2x6;
+
+ uint8_t csp_param;
+ uint8_t csp_value;
+ uint8_t csp_mode;
+ uint8_t csp_regs[256];
+ uint8_t csp_index;
+ uint8_t csp_reg83[4];
+ int csp_reg83r;
+ int csp_reg83w;
+
+ uint8_t in2_data[10];
+ uint8_t out_data[50];
+ uint8_t test_reg;
+ uint8_t last_read_byte;
+ int nzero;
+
+ int left_till_irq;
+
+ int dma_running;
+ int bytes_per_second;
+ int align;
+ int audio_free;
+ SWVoiceOut *voice;
+
+ QEMUTimer *aux_ts;
+ /* mixer state */
+ int mixer_nreg;
+ uint8_t mixer_regs[256];
+} SB16State;
+
+static void SB_audio_callback (void *opaque, int free);
+
+static int magic_of_irq (int irq)
+{
+ switch (irq) {
+ case 5:
+ return 2;
+ case 7:
+ return 4;
+ case 9:
+ return 1;
+ case 10:
+ return 8;
+ default:
+ dolog ("bad irq %d\n", irq);
+ return 2;
+ }
+}
+
+static int irq_of_magic (int magic)
+{
+ switch (magic) {
+ case 1:
+ return 9;
+ case 2:
+ return 5;
+ case 4:
+ return 7;
+ case 8:
+ return 10;
+ default:
+ dolog ("bad irq magic %d\n", magic);
+ return -1;
+ }
+}
+
+#if 0
+static void log_dsp (SB16State *dsp)
+{
+ ldebug ("%s:%s:%d:%s:dmasize=%d:freq=%d:const=%d:speaker=%d\n",
+ dsp->fmt_stereo ? "Stereo" : "Mono",
+ dsp->fmt_signed ? "Signed" : "Unsigned",
+ dsp->fmt_bits,
+ dsp->dma_auto ? "Auto" : "Single",
+ dsp->block_size,
+ dsp->freq,
+ dsp->time_const,
+ dsp->speaker);
+}
+#endif
+
+static void speaker (SB16State *s, int on)
+{
+ s->speaker = on;
+ /* AUD_enable (s->voice, on); */
+}
+
+static void control (SB16State *s, int hold)
+{
+ int dma = s->use_hdma ? s->hdma : s->dma;
+ s->dma_running = hold;
+
+ ldebug ("hold %d high %d dma %d\n", hold, s->use_hdma, dma);
+
+ if (hold) {
+ DMA_hold_DREQ (dma);
+ AUD_set_active_out (s->voice, 1);
+ }
+ else {
+ DMA_release_DREQ (dma);
+ AUD_set_active_out (s->voice, 0);
+ }
+}
+
+static void aux_timer (void *opaque)
+{
+ SB16State *s = opaque;
+ s->can_write = 1;
+ qemu_irq_raise (s->pic);
+}
+
+#define DMA8_AUTO 1
+#define DMA8_HIGH 2
+
+static void continue_dma8 (SB16State *s)
+{
+ if (s->freq > 0) {
+ struct audsettings as;
+
+ s->audio_free = 0;
+
+ as.freq = s->freq;
+ as.nchannels = 1 << s->fmt_stereo;
+ as.fmt = s->fmt;
+ as.endianness = 0;
+
+ s->voice = AUD_open_out (
+ &s->card,
+ s->voice,
+ "sb16",
+ s,
+ SB_audio_callback,
+ &as
+ );
+ }
+
+ control (s, 1);
+}
+
+static void dma_cmd8 (SB16State *s, int mask, int dma_len)
+{
+ s->fmt = AUD_FMT_U8;
+ s->use_hdma = 0;
+ s->fmt_bits = 8;
+ s->fmt_signed = 0;
+ s->fmt_stereo = (s->mixer_regs[0x0e] & 2) != 0;
+ if (-1 == s->time_const) {
+ if (s->freq <= 0)
+ s->freq = 11025;
+ }
+ else {
+ int tmp = (256 - s->time_const);
+ s->freq = (1000000 + (tmp / 2)) / tmp;
+ }
+
+ if (dma_len != -1) {
+ s->block_size = dma_len << s->fmt_stereo;
+ }
+ else {
+ /* This is apparently the only way to make both Act1/PL
+ and SecondReality/FC work
+
+ Act1 sets block size via command 0x48 and it's an odd number
+ SR does the same with even number
+ Both use stereo, and Creatives own documentation states that
+ 0x48 sets block size in bytes less one.. go figure */
+ s->block_size &= ~s->fmt_stereo;
+ }
+
+ s->freq >>= s->fmt_stereo;
+ s->left_till_irq = s->block_size;
+ s->bytes_per_second = (s->freq << s->fmt_stereo);
+ /* s->highspeed = (mask & DMA8_HIGH) != 0; */
+ s->dma_auto = (mask & DMA8_AUTO) != 0;
+ s->align = (1 << s->fmt_stereo) - 1;
+
+ if (s->block_size & s->align) {
+ dolog ("warning: misaligned block size %d, alignment %d\n",
+ s->block_size, s->align + 1);
+ }
+
+ ldebug ("freq %d, stereo %d, sign %d, bits %d, "
+ "dma %d, auto %d, fifo %d, high %d\n",
+ s->freq, s->fmt_stereo, s->fmt_signed, s->fmt_bits,
+ s->block_size, s->dma_auto, s->fifo, s->highspeed);
+
+ continue_dma8 (s);
+ speaker (s, 1);
+}
+
+static void dma_cmd (SB16State *s, uint8_t cmd, uint8_t d0, int dma_len)
+{
+ s->use_hdma = cmd < 0xc0;
+ s->fifo = (cmd >> 1) & 1;
+ s->dma_auto = (cmd >> 2) & 1;
+ s->fmt_signed = (d0 >> 4) & 1;
+ s->fmt_stereo = (d0 >> 5) & 1;
+
+ switch (cmd >> 4) {
+ case 11:
+ s->fmt_bits = 16;
+ break;
+
+ case 12:
+ s->fmt_bits = 8;
+ break;
+ }
+
+ if (-1 != s->time_const) {
+#if 1
+ int tmp = 256 - s->time_const;
+ s->freq = (1000000 + (tmp / 2)) / tmp;
+#else
+ /* s->freq = 1000000 / ((255 - s->time_const) << s->fmt_stereo); */
+ s->freq = 1000000 / ((255 - s->time_const));
+#endif
+ s->time_const = -1;
+ }
+
+ s->block_size = dma_len + 1;
+ s->block_size <<= (s->fmt_bits == 16);
+ if (!s->dma_auto) {
+ /* It is clear that for DOOM and auto-init this value
+ shouldn't take stereo into account, while Miles Sound Systems
+ setsound.exe with single transfer mode wouldn't work without it
+ wonders of SB16 yet again */
+ s->block_size <<= s->fmt_stereo;
+ }
+
+ ldebug ("freq %d, stereo %d, sign %d, bits %d, "
+ "dma %d, auto %d, fifo %d, high %d\n",
+ s->freq, s->fmt_stereo, s->fmt_signed, s->fmt_bits,
+ s->block_size, s->dma_auto, s->fifo, s->highspeed);
+
+ if (16 == s->fmt_bits) {
+ if (s->fmt_signed) {
+ s->fmt = AUD_FMT_S16;
+ }
+ else {
+ s->fmt = AUD_FMT_U16;
+ }
+ }
+ else {
+ if (s->fmt_signed) {
+ s->fmt = AUD_FMT_S8;
+ }
+ else {
+ s->fmt = AUD_FMT_U8;
+ }
+ }
+
+ s->left_till_irq = s->block_size;
+
+ s->bytes_per_second = (s->freq << s->fmt_stereo) << (s->fmt_bits == 16);
+ s->highspeed = 0;
+ s->align = (1 << (s->fmt_stereo + (s->fmt_bits == 16))) - 1;
+ if (s->block_size & s->align) {
+ dolog ("warning: misaligned block size %d, alignment %d\n",
+ s->block_size, s->align + 1);
+ }
+
+ if (s->freq) {
+ struct audsettings as;
+
+ s->audio_free = 0;
+
+ as.freq = s->freq;
+ as.nchannels = 1 << s->fmt_stereo;
+ as.fmt = s->fmt;
+ as.endianness = 0;
+
+ s->voice = AUD_open_out (
+ &s->card,
+ s->voice,
+ "sb16",
+ s,
+ SB_audio_callback,
+ &as
+ );
+ }
+
+ control (s, 1);
+ speaker (s, 1);
+}
+
+static inline void dsp_out_data (SB16State *s, uint8_t val)
+{
+ ldebug ("outdata %#x\n", val);
+ if ((size_t) s->out_data_len < sizeof (s->out_data)) {
+ s->out_data[s->out_data_len++] = val;
+ }
+}
+
+static inline uint8_t dsp_get_data (SB16State *s)
+{
+ if (s->in_index) {
+ return s->in2_data[--s->in_index];
+ }
+ else {
+ dolog ("buffer underflow\n");
+ return 0;
+ }
+}
+
+static void command (SB16State *s, uint8_t cmd)
+{
+ ldebug ("command %#x\n", cmd);
+
+ if (cmd > 0xaf && cmd < 0xd0) {
+ if (cmd & 8) {
+ dolog ("ADC not yet supported (command %#x)\n", cmd);
+ }
+
+ switch (cmd >> 4) {
+ case 11:
+ case 12:
+ break;
+ default:
+ dolog ("%#x wrong bits\n", cmd);
+ }
+ s->needed_bytes = 3;
+ }
+ else {
+ s->needed_bytes = 0;
+
+ switch (cmd) {
+ case 0x03:
+ dsp_out_data (s, 0x10); /* s->csp_param); */
+ goto warn;
+
+ case 0x04:
+ s->needed_bytes = 1;
+ goto warn;
+
+ case 0x05:
+ s->needed_bytes = 2;
+ goto warn;
+
+ case 0x08:
+ /* __asm__ ("int3"); */
+ goto warn;
+
+ case 0x0e:
+ s->needed_bytes = 2;
+ goto warn;
+
+ case 0x09:
+ dsp_out_data (s, 0xf8);
+ goto warn;
+
+ case 0x0f:
+ s->needed_bytes = 1;
+ goto warn;
+
+ case 0x10:
+ s->needed_bytes = 1;
+ goto warn;
+
+ case 0x14:
+ s->needed_bytes = 2;
+ s->block_size = 0;
+ break;
+
+ case 0x1c: /* Auto-Initialize DMA DAC, 8-bit */
+ dma_cmd8 (s, DMA8_AUTO, -1);
+ break;
+
+ case 0x20: /* Direct ADC, Juice/PL */
+ dsp_out_data (s, 0xff);
+ goto warn;
+
+ case 0x35:
+ dolog ("0x35 - MIDI command not implemented\n");
+ break;
+
+ case 0x40:
+ s->freq = -1;
+ s->time_const = -1;
+ s->needed_bytes = 1;
+ break;
+
+ case 0x41:
+ s->freq = -1;
+ s->time_const = -1;
+ s->needed_bytes = 2;
+ break;
+
+ case 0x42:
+ s->freq = -1;
+ s->time_const = -1;
+ s->needed_bytes = 2;
+ goto warn;
+
+ case 0x45:
+ dsp_out_data (s, 0xaa);
+ goto warn;
+
+ case 0x47: /* Continue Auto-Initialize DMA 16bit */
+ break;
+
+ case 0x48:
+ s->needed_bytes = 2;
+ break;
+
+ case 0x74:
+ s->needed_bytes = 2; /* DMA DAC, 4-bit ADPCM */
+ dolog ("0x75 - DMA DAC, 4-bit ADPCM not implemented\n");
+ break;
+
+ case 0x75: /* DMA DAC, 4-bit ADPCM Reference */
+ s->needed_bytes = 2;
+ dolog ("0x74 - DMA DAC, 4-bit ADPCM Reference not implemented\n");
+ break;
+
+ case 0x76: /* DMA DAC, 2.6-bit ADPCM */
+ s->needed_bytes = 2;
+ dolog ("0x74 - DMA DAC, 2.6-bit ADPCM not implemented\n");
+ break;
+
+ case 0x77: /* DMA DAC, 2.6-bit ADPCM Reference */
+ s->needed_bytes = 2;
+ dolog ("0x74 - DMA DAC, 2.6-bit ADPCM Reference not implemented\n");
+ break;
+
+ case 0x7d:
+ dolog ("0x7d - Autio-Initialize DMA DAC, 4-bit ADPCM Reference\n");
+ dolog ("not implemented\n");
+ break;
+
+ case 0x7f:
+ dolog (
+ "0x7d - Autio-Initialize DMA DAC, 2.6-bit ADPCM Reference\n"
+ );
+ dolog ("not implemented\n");
+ break;
+
+ case 0x80:
+ s->needed_bytes = 2;
+ break;
+
+ case 0x90:
+ case 0x91:
+ dma_cmd8 (s, ((cmd & 1) == 0) | DMA8_HIGH, -1);
+ break;
+
+ case 0xd0: /* halt DMA operation. 8bit */
+ control (s, 0);
+ break;
+
+ case 0xd1: /* speaker on */
+ speaker (s, 1);
+ break;
+
+ case 0xd3: /* speaker off */
+ speaker (s, 0);
+ break;
+
+ case 0xd4: /* continue DMA operation. 8bit */
+ /* KQ6 (or maybe Sierras audblst.drv in general) resets
+ the frequency between halt/continue */
+ continue_dma8 (s);
+ break;
+
+ case 0xd5: /* halt DMA operation. 16bit */
+ control (s, 0);
+ break;
+
+ case 0xd6: /* continue DMA operation. 16bit */
+ control (s, 1);
+ break;
+
+ case 0xd9: /* exit auto-init DMA after this block. 16bit */
+ s->dma_auto = 0;
+ break;
+
+ case 0xda: /* exit auto-init DMA after this block. 8bit */
+ s->dma_auto = 0;
+ break;
+
+ case 0xe0: /* DSP identification */
+ s->needed_bytes = 1;
+ break;
+
+ case 0xe1:
+ dsp_out_data (s, s->ver & 0xff);
+ dsp_out_data (s, s->ver >> 8);
+ break;
+
+ case 0xe2:
+ s->needed_bytes = 1;
+ goto warn;
+
+ case 0xe3:
+ {
+ int i;
+ for (i = sizeof (e3) - 1; i >= 0; --i)
+ dsp_out_data (s, e3[i]);
+ }
+ break;
+
+ case 0xe4: /* write test reg */
+ s->needed_bytes = 1;
+ break;
+
+ case 0xe7:
+ dolog ("Attempt to probe for ESS (0xe7)?\n");
+ break;
+
+ case 0xe8: /* read test reg */
+ dsp_out_data (s, s->test_reg);
+ break;
+
+ case 0xf2:
+ case 0xf3:
+ dsp_out_data (s, 0xaa);
+ s->mixer_regs[0x82] |= (cmd == 0xf2) ? 1 : 2;
+ qemu_irq_raise (s->pic);
+ break;
+
+ case 0xf9:
+ s->needed_bytes = 1;
+ goto warn;
+
+ case 0xfa:
+ dsp_out_data (s, 0);
+ goto warn;
+
+ case 0xfc: /* FIXME */
+ dsp_out_data (s, 0);
+ goto warn;
+
+ default:
+ dolog ("Unrecognized command %#x\n", cmd);
+ break;
+ }
+ }
+
+ if (!s->needed_bytes) {
+ ldebug ("\n");
+ }
+
+ exit:
+ if (!s->needed_bytes) {
+ s->cmd = -1;
+ }
+ else {
+ s->cmd = cmd;
+ }
+ return;
+
+ warn:
+ dolog ("warning: command %#x,%d is not truly understood yet\n",
+ cmd, s->needed_bytes);
+ goto exit;
+
+}
+
+static uint16_t dsp_get_lohi (SB16State *s)
+{
+ uint8_t hi = dsp_get_data (s);
+ uint8_t lo = dsp_get_data (s);
+ return (hi << 8) | lo;
+}
+
+static uint16_t dsp_get_hilo (SB16State *s)
+{
+ uint8_t lo = dsp_get_data (s);
+ uint8_t hi = dsp_get_data (s);
+ return (hi << 8) | lo;
+}
+
+static void complete (SB16State *s)
+{
+ int d0, d1, d2;
+ ldebug ("complete command %#x, in_index %d, needed_bytes %d\n",
+ s->cmd, s->in_index, s->needed_bytes);
+
+ if (s->cmd > 0xaf && s->cmd < 0xd0) {
+ d2 = dsp_get_data (s);
+ d1 = dsp_get_data (s);
+ d0 = dsp_get_data (s);
+
+ if (s->cmd & 8) {
+ dolog ("ADC params cmd = %#x d0 = %d, d1 = %d, d2 = %d\n",
+ s->cmd, d0, d1, d2);
+ }
+ else {
+ ldebug ("cmd = %#x d0 = %d, d1 = %d, d2 = %d\n",
+ s->cmd, d0, d1, d2);
+ dma_cmd (s, s->cmd, d0, d1 + (d2 << 8));
+ }
+ }
+ else {
+ switch (s->cmd) {
+ case 0x04:
+ s->csp_mode = dsp_get_data (s);
+ s->csp_reg83r = 0;
+ s->csp_reg83w = 0;
+ ldebug ("CSP command 0x04: mode=%#x\n", s->csp_mode);
+ break;
+
+ case 0x05:
+ s->csp_param = dsp_get_data (s);
+ s->csp_value = dsp_get_data (s);
+ ldebug ("CSP command 0x05: param=%#x value=%#x\n",
+ s->csp_param,
+ s->csp_value);
+ break;
+
+ case 0x0e:
+ d0 = dsp_get_data (s);
+ d1 = dsp_get_data (s);
+ ldebug ("write CSP register %d <- %#x\n", d1, d0);
+ if (d1 == 0x83) {
+ ldebug ("0x83[%d] <- %#x\n", s->csp_reg83r, d0);
+ s->csp_reg83[s->csp_reg83r % 4] = d0;
+ s->csp_reg83r += 1;
+ }
+ else {
+ s->csp_regs[d1] = d0;
+ }
+ break;
+
+ case 0x0f:
+ d0 = dsp_get_data (s);
+ ldebug ("read CSP register %#x -> %#x, mode=%#x\n",
+ d0, s->csp_regs[d0], s->csp_mode);
+ if (d0 == 0x83) {
+ ldebug ("0x83[%d] -> %#x\n",
+ s->csp_reg83w,
+ s->csp_reg83[s->csp_reg83w % 4]);
+ dsp_out_data (s, s->csp_reg83[s->csp_reg83w % 4]);
+ s->csp_reg83w += 1;
+ }
+ else {
+ dsp_out_data (s, s->csp_regs[d0]);
+ }
+ break;
+
+ case 0x10:
+ d0 = dsp_get_data (s);
+ dolog ("cmd 0x10 d0=%#x\n", d0);
+ break;
+
+ case 0x14:
+ dma_cmd8 (s, 0, dsp_get_lohi (s) + 1);
+ break;
+
+ case 0x40:
+ s->time_const = dsp_get_data (s);
+ ldebug ("set time const %d\n", s->time_const);
+ break;
+
+ case 0x42: /* FT2 sets output freq with this, go figure */
+#if 0
+ dolog ("cmd 0x42 might not do what it think it should\n");
+#endif
+ case 0x41:
+ s->freq = dsp_get_hilo (s);
+ ldebug ("set freq %d\n", s->freq);
+ break;
+
+ case 0x48:
+ s->block_size = dsp_get_lohi (s) + 1;
+ ldebug ("set dma block len %d\n", s->block_size);
+ break;
+
+ case 0x74:
+ case 0x75:
+ case 0x76:
+ case 0x77:
+ /* ADPCM stuff, ignore */
+ break;
+
+ case 0x80:
+ {
+ int freq, samples, bytes;
+ int64_t ticks;
+
+ freq = s->freq > 0 ? s->freq : 11025;
+ samples = dsp_get_lohi (s) + 1;
+ bytes = samples << s->fmt_stereo << (s->fmt_bits == 16);
+ ticks = muldiv64 (bytes, get_ticks_per_sec (), freq);
+ if (ticks < get_ticks_per_sec () / 1024) {
+ qemu_irq_raise (s->pic);
+ }
+ else {
+ if (s->aux_ts) {
+ qemu_mod_timer (
+ s->aux_ts,
+ qemu_get_clock_ns (vm_clock) + ticks
+ );
+ }
+ }
+ ldebug ("mix silence %d %d %" PRId64 "\n", samples, bytes, ticks);
+ }
+ break;
+
+ case 0xe0:
+ d0 = dsp_get_data (s);
+ s->out_data_len = 0;
+ ldebug ("E0 data = %#x\n", d0);
+ dsp_out_data (s, ~d0);
+ break;
+
+ case 0xe2:
+#ifdef DEBUG
+ d0 = dsp_get_data (s);
+ dolog ("E2 = %#x\n", d0);
+#endif
+ break;
+
+ case 0xe4:
+ s->test_reg = dsp_get_data (s);
+ break;
+
+ case 0xf9:
+ d0 = dsp_get_data (s);
+ ldebug ("command 0xf9 with %#x\n", d0);
+ switch (d0) {
+ case 0x0e:
+ dsp_out_data (s, 0xff);
+ break;
+
+ case 0x0f:
+ dsp_out_data (s, 0x07);
+ break;
+
+ case 0x37:
+ dsp_out_data (s, 0x38);
+ break;
+
+ default:
+ dsp_out_data (s, 0x00);
+ break;
+ }
+ break;
+
+ default:
+ dolog ("complete: unrecognized command %#x\n", s->cmd);
+ return;
+ }
+ }
+
+ ldebug ("\n");
+ s->cmd = -1;
+}
+
+static void legacy_reset (SB16State *s)
+{
+ struct audsettings as;
+
+ s->freq = 11025;
+ s->fmt_signed = 0;
+ s->fmt_bits = 8;
+ s->fmt_stereo = 0;
+
+ as.freq = s->freq;
+ as.nchannels = 1;
+ as.fmt = AUD_FMT_U8;
+ as.endianness = 0;
+
+ s->voice = AUD_open_out (
+ &s->card,
+ s->voice,
+ "sb16",
+ s,
+ SB_audio_callback,
+ &as
+ );
+
+ /* Not sure about that... */
+ /* AUD_set_active_out (s->voice, 1); */
+}
+
+static void reset (SB16State *s)
+{
+ qemu_irq_lower (s->pic);
+ if (s->dma_auto) {
+ qemu_irq_raise (s->pic);
+ qemu_irq_lower (s->pic);
+ }
+
+ s->mixer_regs[0x82] = 0;
+ s->dma_auto = 0;
+ s->in_index = 0;
+ s->out_data_len = 0;
+ s->left_till_irq = 0;
+ s->needed_bytes = 0;
+ s->block_size = -1;
+ s->nzero = 0;
+ s->highspeed = 0;
+ s->v2x6 = 0;
+ s->cmd = -1;
+
+ dsp_out_data (s, 0xaa);
+ speaker (s, 0);
+ control (s, 0);
+ legacy_reset (s);
+}
+
+static IO_WRITE_PROTO (dsp_write)
+{
+ SB16State *s = opaque;
+ int iport;
+
+ iport = nport - s->port;
+
+ ldebug ("write %#x <- %#x\n", nport, val);
+ switch (iport) {
+ case 0x06:
+ switch (val) {
+ case 0x00:
+ if (s->v2x6 == 1) {
+ reset (s);
+ }
+ s->v2x6 = 0;
+ break;
+
+ case 0x01:
+ case 0x03: /* FreeBSD kludge */
+ s->v2x6 = 1;
+ break;
+
+ case 0xc6:
+ s->v2x6 = 0; /* Prince of Persia, csp.sys, diagnose.exe */
+ break;
+
+ case 0xb8: /* Panic */
+ reset (s);
+ break;
+
+ case 0x39:
+ dsp_out_data (s, 0x38);
+ reset (s);
+ s->v2x6 = 0x39;
+ break;
+
+ default:
+ s->v2x6 = val;
+ break;
+ }
+ break;
+
+ case 0x0c: /* write data or command | write status */
+/* if (s->highspeed) */
+/* break; */
+
+ if (0 == s->needed_bytes) {
+ command (s, val);
+#if 0
+ if (0 == s->needed_bytes) {
+ log_dsp (s);
+ }
+#endif
+ }
+ else {
+ if (s->in_index == sizeof (s->in2_data)) {
+ dolog ("in data overrun\n");
+ }
+ else {
+ s->in2_data[s->in_index++] = val;
+ if (s->in_index == s->needed_bytes) {
+ s->needed_bytes = 0;
+ complete (s);
+#if 0
+ log_dsp (s);
+#endif
+ }
+ }
+ }
+ break;
+
+ default:
+ ldebug ("(nport=%#x, val=%#x)\n", nport, val);
+ break;
+ }
+}
+
+static IO_READ_PROTO (dsp_read)
+{
+ SB16State *s = opaque;
+ int iport, retval, ack = 0;
+
+ iport = nport - s->port;
+
+ switch (iport) {
+ case 0x06: /* reset */
+ retval = 0xff;
+ break;
+
+ case 0x0a: /* read data */
+ if (s->out_data_len) {
+ retval = s->out_data[--s->out_data_len];
+ s->last_read_byte = retval;
+ }
+ else {
+ if (s->cmd != -1) {
+ dolog ("empty output buffer for command %#x\n",
+ s->cmd);
+ }
+ retval = s->last_read_byte;
+ /* goto error; */
+ }
+ break;
+
+ case 0x0c: /* 0 can write */
+ retval = s->can_write ? 0 : 0x80;
+ break;
+
+ case 0x0d: /* timer interrupt clear */
+ /* dolog ("timer interrupt clear\n"); */
+ retval = 0;
+ break;
+
+ case 0x0e: /* data available status | irq 8 ack */
+ retval = (!s->out_data_len || s->highspeed) ? 0 : 0x80;
+ if (s->mixer_regs[0x82] & 1) {
+ ack = 1;
+ s->mixer_regs[0x82] &= 1;
+ qemu_irq_lower (s->pic);
+ }
+ break;
+
+ case 0x0f: /* irq 16 ack */
+ retval = 0xff;
+ if (s->mixer_regs[0x82] & 2) {
+ ack = 1;
+ s->mixer_regs[0x82] &= 2;
+ qemu_irq_lower (s->pic);
+ }
+ break;
+
+ default:
+ goto error;
+ }
+
+ if (!ack) {
+ ldebug ("read %#x -> %#x\n", nport, retval);
+ }
+
+ return retval;
+
+ error:
+ dolog ("warning: dsp_read %#x error\n", nport);
+ return 0xff;
+}
+
+static void reset_mixer (SB16State *s)
+{
+ int i;
+
+ memset (s->mixer_regs, 0xff, 0x7f);
+ memset (s->mixer_regs + 0x83, 0xff, sizeof (s->mixer_regs) - 0x83);
+
+ s->mixer_regs[0x02] = 4; /* master volume 3bits */
+ s->mixer_regs[0x06] = 4; /* MIDI volume 3bits */
+ s->mixer_regs[0x08] = 0; /* CD volume 3bits */
+ s->mixer_regs[0x0a] = 0; /* voice volume 2bits */
+
+ /* d5=input filt, d3=lowpass filt, d1,d2=input source */
+ s->mixer_regs[0x0c] = 0;
+
+ /* d5=output filt, d1=stereo switch */
+ s->mixer_regs[0x0e] = 0;
+
+ /* voice volume L d5,d7, R d1,d3 */
+ s->mixer_regs[0x04] = (4 << 5) | (4 << 1);
+ /* master ... */
+ s->mixer_regs[0x22] = (4 << 5) | (4 << 1);
+ /* MIDI ... */
+ s->mixer_regs[0x26] = (4 << 5) | (4 << 1);
+
+ for (i = 0x30; i < 0x48; i++) {
+ s->mixer_regs[i] = 0x20;
+ }
+}
+
+static IO_WRITE_PROTO (mixer_write_indexb)
+{
+ SB16State *s = opaque;
+ (void) nport;
+ s->mixer_nreg = val;
+}
+
+static IO_WRITE_PROTO (mixer_write_datab)
+{
+ SB16State *s = opaque;
+
+ (void) nport;
+ ldebug ("mixer_write [%#x] <- %#x\n", s->mixer_nreg, val);
+
+ switch (s->mixer_nreg) {
+ case 0x00:
+ reset_mixer (s);
+ break;
+
+ case 0x80:
+ {
+ int irq = irq_of_magic (val);
+ ldebug ("setting irq to %d (val=%#x)\n", irq, val);
+ if (irq > 0) {
+ s->irq = irq;
+ }
+ }
+ break;
+
+ case 0x81:
+ {
+ int dma, hdma;
+
+ dma = ctz32 (val & 0xf);
+ hdma = ctz32 (val & 0xf0);
+ if (dma != s->dma || hdma != s->hdma) {
+ dolog (
+ "attempt to change DMA "
+ "8bit %d(%d), 16bit %d(%d) (val=%#x)\n",
+ dma, s->dma, hdma, s->hdma, val);
+ }
+#if 0
+ s->dma = dma;
+ s->hdma = hdma;
+#endif
+ }
+ break;
+
+ case 0x82:
+ dolog ("attempt to write into IRQ status register (val=%#x)\n",
+ val);
+ return;
+
+ default:
+ if (s->mixer_nreg >= 0x80) {
+ ldebug ("attempt to write mixer[%#x] <- %#x\n", s->mixer_nreg, val);
+ }
+ break;
+ }
+
+ s->mixer_regs[s->mixer_nreg] = val;
+}
+
+static IO_WRITE_PROTO (mixer_write_indexw)
+{
+ mixer_write_indexb (opaque, nport, val & 0xff);
+ mixer_write_datab (opaque, nport, (val >> 8) & 0xff);
+}
+
+static IO_READ_PROTO (mixer_read)
+{
+ SB16State *s = opaque;
+
+ (void) nport;
+#ifndef DEBUG_SB16_MOST
+ if (s->mixer_nreg != 0x82) {
+ ldebug ("mixer_read[%#x] -> %#x\n",
+ s->mixer_nreg, s->mixer_regs[s->mixer_nreg]);
+ }
+#else
+ ldebug ("mixer_read[%#x] -> %#x\n",
+ s->mixer_nreg, s->mixer_regs[s->mixer_nreg]);
+#endif
+ return s->mixer_regs[s->mixer_nreg];
+}
+
+static int write_audio (SB16State *s, int nchan, int dma_pos,
+ int dma_len, int len)
+{
+ int temp, net;
+ uint8_t tmpbuf[4096];
+
+ temp = len;
+ net = 0;
+
+ while (temp) {
+ int left = dma_len - dma_pos;
+ int copied;
+ size_t to_copy;
+
+ to_copy = audio_MIN (temp, left);
+ if (to_copy > sizeof (tmpbuf)) {
+ to_copy = sizeof (tmpbuf);
+ }
+
+ copied = DMA_read_memory (nchan, tmpbuf, dma_pos, to_copy);
+ copied = AUD_write (s->voice, tmpbuf, copied);
+
+ temp -= copied;
+ dma_pos = (dma_pos + copied) % dma_len;
+ net += copied;
+
+ if (!copied) {
+ break;
+ }
+ }
+
+ return net;
+}
+
+static int SB_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
+{
+ SB16State *s = opaque;
+ int till, copy, written, free;
+
+ if (s->block_size <= 0) {
+ dolog ("invalid block size=%d nchan=%d dma_pos=%d dma_len=%d\n",
+ s->block_size, nchan, dma_pos, dma_len);
+ return dma_pos;
+ }
+
+ if (s->left_till_irq < 0) {
+ s->left_till_irq = s->block_size;
+ }
+
+ if (s->voice) {
+ free = s->audio_free & ~s->align;
+ if ((free <= 0) || !dma_len) {
+ return dma_pos;
+ }
+ }
+ else {
+ free = dma_len;
+ }
+
+ copy = free;
+ till = s->left_till_irq;
+
+#ifdef DEBUG_SB16_MOST
+ dolog ("pos:%06d %d till:%d len:%d\n",
+ dma_pos, free, till, dma_len);
+#endif
+
+ if (till <= copy) {
+ if (0 == s->dma_auto) {
+ copy = till;
+ }
+ }
+
+ written = write_audio (s, nchan, dma_pos, dma_len, copy);
+ dma_pos = (dma_pos + written) % dma_len;
+ s->left_till_irq -= written;
+
+ if (s->left_till_irq <= 0) {
+ s->mixer_regs[0x82] |= (nchan & 4) ? 2 : 1;
+ qemu_irq_raise (s->pic);
+ if (0 == s->dma_auto) {
+ control (s, 0);
+ speaker (s, 0);
+ }
+ }
+
+#ifdef DEBUG_SB16_MOST
+ ldebug ("pos %5d free %5d size %5d till % 5d copy %5d written %5d size %5d\n",
+ dma_pos, free, dma_len, s->left_till_irq, copy, written,
+ s->block_size);
+#endif
+
+ while (s->left_till_irq <= 0) {
+ s->left_till_irq = s->block_size + s->left_till_irq;
+ }
+
+ return dma_pos;
+}
+
+static void SB_audio_callback (void *opaque, int free)
+{
+ SB16State *s = opaque;
+ s->audio_free = free;
+}
+
+static int sb16_post_load (void *opaque, int version_id)
+{
+ SB16State *s = opaque;
+
+ if (s->voice) {
+ AUD_close_out (&s->card, s->voice);
+ s->voice = NULL;
+ }
+
+ if (s->dma_running) {
+ if (s->freq) {
+ struct audsettings as;
+
+ s->audio_free = 0;
+
+ as.freq = s->freq;
+ as.nchannels = 1 << s->fmt_stereo;
+ as.fmt = s->fmt;
+ as.endianness = 0;
+
+ s->voice = AUD_open_out (
+ &s->card,
+ s->voice,
+ "sb16",
+ s,
+ SB_audio_callback,
+ &as
+ );
+ }
+
+ control (s, 1);
+ speaker (s, s->speaker);
+ }
+ return 0;
+}
+
+static const VMStateDescription vmstate_sb16 = {
+ .name = "sb16",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .post_load = sb16_post_load,
+ .fields = (VMStateField []) {
+ VMSTATE_UINT32 (irq, SB16State),
+ VMSTATE_UINT32 (dma, SB16State),
+ VMSTATE_UINT32 (hdma, SB16State),
+ VMSTATE_UINT32 (port, SB16State),
+ VMSTATE_UINT32 (ver, SB16State),
+ VMSTATE_INT32 (in_index, SB16State),
+ VMSTATE_INT32 (out_data_len, SB16State),
+ VMSTATE_INT32 (fmt_stereo, SB16State),
+ VMSTATE_INT32 (fmt_signed, SB16State),
+ VMSTATE_INT32 (fmt_bits, SB16State),
+ VMSTATE_UINT32 (fmt, SB16State),
+ VMSTATE_INT32 (dma_auto, SB16State),
+ VMSTATE_INT32 (block_size, SB16State),
+ VMSTATE_INT32 (fifo, SB16State),
+ VMSTATE_INT32 (freq, SB16State),
+ VMSTATE_INT32 (time_const, SB16State),
+ VMSTATE_INT32 (speaker, SB16State),
+ VMSTATE_INT32 (needed_bytes, SB16State),
+ VMSTATE_INT32 (cmd, SB16State),
+ VMSTATE_INT32 (use_hdma, SB16State),
+ VMSTATE_INT32 (highspeed, SB16State),
+ VMSTATE_INT32 (can_write, SB16State),
+ VMSTATE_INT32 (v2x6, SB16State),
+
+ VMSTATE_UINT8 (csp_param, SB16State),
+ VMSTATE_UINT8 (csp_value, SB16State),
+ VMSTATE_UINT8 (csp_mode, SB16State),
+ VMSTATE_UINT8 (csp_param, SB16State),
+ VMSTATE_BUFFER (csp_regs, SB16State),
+ VMSTATE_UINT8 (csp_index, SB16State),
+ VMSTATE_BUFFER (csp_reg83, SB16State),
+ VMSTATE_INT32 (csp_reg83r, SB16State),
+ VMSTATE_INT32 (csp_reg83w, SB16State),
+
+ VMSTATE_BUFFER (in2_data, SB16State),
+ VMSTATE_BUFFER (out_data, SB16State),
+ VMSTATE_UINT8 (test_reg, SB16State),
+ VMSTATE_UINT8 (last_read_byte, SB16State),
+
+ VMSTATE_INT32 (nzero, SB16State),
+ VMSTATE_INT32 (left_till_irq, SB16State),
+ VMSTATE_INT32 (dma_running, SB16State),
+ VMSTATE_INT32 (bytes_per_second, SB16State),
+ VMSTATE_INT32 (align, SB16State),
+
+ VMSTATE_INT32 (mixer_nreg, SB16State),
+ VMSTATE_BUFFER (mixer_regs, SB16State),
+
+ VMSTATE_END_OF_LIST ()
+ }
+};
+
+static const MemoryRegionPortio sb16_ioport_list[] = {
+ { 4, 1, 1, .write = mixer_write_indexb },
+ { 4, 1, 2, .write = mixer_write_indexw },
+ { 5, 1, 1, .read = mixer_read, .write = mixer_write_datab },
+ { 6, 1, 1, .read = dsp_read, .write = dsp_write },
+ { 10, 1, 1, .read = dsp_read },
+ { 12, 1, 1, .write = dsp_write },
+ { 12, 4, 1, .read = dsp_read },
+ PORTIO_END_OF_LIST (),
+};
+
+
+static int sb16_initfn (ISADevice *dev)
+{
+ SB16State *s;
+
+ s = DO_UPCAST (SB16State, dev, dev);
+
+ s->cmd = -1;
+ isa_init_irq (dev, &s->pic, s->irq);
+
+ s->mixer_regs[0x80] = magic_of_irq (s->irq);
+ s->mixer_regs[0x81] = (1 << s->dma) | (1 << s->hdma);
+ s->mixer_regs[0x82] = 2 << 5;
+
+ s->csp_regs[5] = 1;
+ s->csp_regs[9] = 0xf8;
+
+ reset_mixer (s);
+ s->aux_ts = qemu_new_timer_ns (vm_clock, aux_timer, s);
+ if (!s->aux_ts) {
+ dolog ("warning: Could not create auxiliary timer\n");
+ }
+
+ isa_register_portio_list (dev, s->port, sb16_ioport_list, s, "sb16");
+
+ DMA_register_channel (s->hdma, SB_read_DMA, s);
+ DMA_register_channel (s->dma, SB_read_DMA, s);
+ s->can_write = 1;
+
+ AUD_register_card ("sb16", &s->card);
+ return 0;
+}
+
+int SB16_init (ISABus *bus)
+{
+ isa_create_simple (bus, "sb16");
+ return 0;
+}
+
+static Property sb16_properties[] = {
+ DEFINE_PROP_HEX32 ("version", SB16State, ver, 0x0405), /* 4.5 */
+ DEFINE_PROP_HEX32 ("iobase", SB16State, port, 0x220),
+ DEFINE_PROP_UINT32 ("irq", SB16State, irq, 5),
+ DEFINE_PROP_UINT32 ("dma", SB16State, dma, 1),
+ DEFINE_PROP_UINT32 ("dma16", SB16State, hdma, 5),
+ DEFINE_PROP_END_OF_LIST (),
+};
+
+static void sb16_class_initfn (ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS (klass);
+ ISADeviceClass *ic = ISA_DEVICE_CLASS (klass);
+ ic->init = sb16_initfn;
+ dc->desc = "Creative Sound Blaster 16";
+ dc->vmsd = &vmstate_sb16;
+ dc->props = sb16_properties;
+}
+
+static const TypeInfo sb16_info = {
+ .name = "sb16",
+ .parent = TYPE_ISA_DEVICE,
+ .instance_size = sizeof (SB16State),
+ .class_init = sb16_class_initfn,
+};
+
+static void sb16_register_types (void)
+{
+ type_register_static (&sb16_info);
+}
+
+type_init (sb16_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-26 06:23:50 +0000