bc0b1dc1eb
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@561 c046a42c-6fe2-441c-8c8c-71466251a162
737 lines
16 KiB
C
737 lines
16 KiB
C
/*
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* QEMU Soundblaster 16 emulation
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*
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* Copyright (c) 2003 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include "vl.h"
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#define MIN(a, b) ((a)>(b)?(b):(a))
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#define LENOFA(a) ((int) (sizeof(a)/sizeof(a[0])))
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#define DEREF(x) (void)x
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#define log(...) fprintf (stderr, "sb16: " __VA_ARGS__)
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#define Fail(...) do { \
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fprintf (stderr, "sb16: " __VA_ARGS__); \
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abort (); \
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} while (0)
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/* #define DEBUG_SB16 */
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#ifdef DEBUG_SB16
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#define lwarn(...) fprintf (stderr, "sb16: " __VA_ARGS__)
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#define linfo(...) fprintf (stderr, "sb16: " __VA_ARGS__)
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#define ldebug(...) fprintf (stderr, "sb16: " __VA_ARGS__)
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#else
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#define lwarn(...)
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#define linfo(...)
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#define ldebug(...)
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#endif
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#define IO_READ_PROTO(name) \
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uint32_t name (struct CPUState *env, uint32_t nport)
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#define IO_WRITE_PROTO(name) \
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void name (struct CPUState *env, uint32_t nport, uint32_t val)
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static struct {
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int ver_lo;
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int ver_hi;
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int irq;
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int dma;
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int hdma;
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int port;
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int mix_block;
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} sb = {5, 4, 5, 1, 5, 0x220, -1};
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static int mix_block, noirq;
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static struct mixer {
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int nreg;
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uint8_t regs[0x83];
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} mixer;
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static struct dsp {
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int in_index;
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int out_data_len;
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int fmt_stereo;
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int fmt_signed;
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int fmt_bits;
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int dma_auto;
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int dma_buffer_size;
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int fifo;
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int freq;
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int time_const;
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int speaker;
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int needed_bytes;
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int cmd;
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int dma_pos;
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int use_hdma;
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int v2x6;
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uint8_t in_data[10];
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uint8_t out_data[10];
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int left_till_irq;
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} dsp;
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#define nocmd ~0
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static void log_dsp (const char *cap)
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{
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DEREF (cap);
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linfo ("%c:%c:%d:%c:dmabuf=%d:pos=%d:freq=%d:timeconst=%d:speaker=%d\n",
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dsp.fmt_stereo ? 'S' : 'M',
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dsp.fmt_signed ? 'S' : 'U',
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dsp.fmt_bits,
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dsp.dma_auto ? 'a' : 's',
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dsp.dma_buffer_size,
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dsp.dma_pos,
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dsp.freq,
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dsp.time_const,
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dsp.speaker);
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}
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static void control (int hold)
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{
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linfo ("%d high %d\n", hold, dsp.use_hdma);
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if (hold) {
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if (dsp.use_hdma)
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DMA_hold_DREQ (sb.hdma);
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else
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DMA_hold_DREQ (sb.dma);
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}
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else {
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if (dsp.use_hdma)
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DMA_release_DREQ (sb.hdma);
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else
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DMA_release_DREQ (sb.dma);
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}
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}
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static void dma_cmd (uint8_t cmd, uint8_t d0, int dma_len)
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{
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int bps;
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audfmt_e fmt;
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dsp.use_hdma = cmd < 0xc0;
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dsp.fifo = (cmd >> 1) & 1;
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dsp.dma_auto = (cmd >> 2) & 1;
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switch (cmd >> 4) {
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case 11:
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dsp.fmt_bits = 16;
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break;
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case 12:
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dsp.fmt_bits = 8;
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break;
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}
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dsp.fmt_signed = (d0 >> 4) & 1;
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dsp.fmt_stereo = (d0 >> 5) & 1;
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if (-1 != dsp.time_const) {
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int tmp;
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tmp = 256 - dsp.time_const;
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dsp.freq = (1000000 + (tmp / 2)) / tmp;
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}
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bps = 1 << (16 == dsp.fmt_bits);
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if (-1 != dma_len)
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dsp.dma_buffer_size = (dma_len + 1) * bps;
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linfo ("frequency %d, stereo %d, signed %d, bits %d, size %d, auto %d\n",
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dsp.freq, dsp.fmt_stereo, dsp.fmt_signed, dsp.fmt_bits,
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dsp.dma_buffer_size, dsp.dma_auto);
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if (16 == dsp.fmt_bits) {
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if (dsp.fmt_signed) {
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fmt = AUD_FMT_S16;
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}
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else {
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fmt = AUD_FMT_U16;
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}
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}
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else {
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if (dsp.fmt_signed) {
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fmt = AUD_FMT_S8;
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}
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else {
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fmt = AUD_FMT_U8;
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}
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}
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dsp.dma_pos = 0;
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dsp.left_till_irq = dsp.dma_buffer_size;
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if (sb.mix_block) {
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mix_block = sb.mix_block;
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}
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else {
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int align;
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align = bps << dsp.fmt_stereo;
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mix_block = ((dsp.freq * align) / 100) & ~(align - 1);
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}
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AUD_reset (dsp.freq, 1 << dsp.fmt_stereo, fmt);
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control (1);
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dsp.speaker = 1;
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}
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static void command (uint8_t cmd)
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{
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char *msg;
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msg = (char *) -1;
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linfo ("%#x\n", cmd);
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if (cmd > 0xaf && cmd < 0xd0) {
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if (cmd & 8)
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goto error;
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switch (cmd >> 4) {
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case 11:
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case 12:
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break;
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default:
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msg = "wrong bits";
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goto error;
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}
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dsp.needed_bytes = 3;
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}
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else {
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switch (cmd) {
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case 0x00:
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case 0x03:
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case 0xe7:
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/* IMS uses those when probing for sound devices */
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return;
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case 0x10:
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dsp.needed_bytes = 1;
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break;
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case 0x14:
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dsp.needed_bytes = 2;
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dsp.dma_buffer_size = 0;
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break;
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case 0x20:
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dsp.out_data[dsp.out_data_len++] = 0xff;
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break;
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case 0x35:
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lwarn ("MIDI commands not implemented\n");
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break;
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case 0x40:
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dsp.freq = -1;
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dsp.time_const = -1;
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dsp.needed_bytes = 1;
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break;
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case 0x41:
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case 0x42:
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dsp.freq = -1;
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dsp.time_const = -1;
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dsp.needed_bytes = 2;
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break;
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case 0x47: /* Continue Auto-Initialize DMA 16bit */
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break;
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case 0x48:
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dsp.needed_bytes = 2;
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break;
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case 0x27: /* ????????? */
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case 0x4e:
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return;
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case 0x80:
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cmd = nocmd;
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break;
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case 0x90:
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case 0x91:
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{
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uint8_t d0;
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d0 = 4;
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if (dsp.fmt_signed) d0 |= 16;
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if (dsp.fmt_stereo) d0 |= 32;
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dma_cmd (cmd == 0x90 ? 0xc4 : 0xc0, d0, -1);
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cmd = nocmd;
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break;
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}
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case 0xd0: /* XXX */
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control (0);
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return;
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case 0xd1:
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dsp.speaker = 1;
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break;
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case 0xd3:
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dsp.speaker = 0;
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return;
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case 0xd4:
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control (1);
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break;
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case 0xd5:
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control (0);
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break;
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case 0xd6:
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control (1);
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break;
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case 0xd9:
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control (0);
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dsp.dma_auto = 0;
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return;
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case 0xda:
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control (0);
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dsp.dma_auto = 0;
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break;
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case 0xe0:
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dsp.needed_bytes = 1;
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break;
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case 0xe1:
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dsp.out_data[dsp.out_data_len++] = sb.ver_lo;
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dsp.out_data[dsp.out_data_len++] = sb.ver_hi;
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return;
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case 0xf2:
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dsp.out_data[dsp.out_data_len++] = 0xaa;
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mixer.regs[0x82] |= mixer.regs[0x80];
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pic_set_irq (sb.irq, 1);
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return;
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default:
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msg = "is unknown";
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goto error;
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}
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}
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dsp.cmd = cmd;
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return;
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error:
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Fail ("%#x %s", cmd, msg);
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return;
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}
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static void complete (void)
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{
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linfo ("complete command %#x, in_index %d, needed_bytes %d\n",
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dsp.cmd, dsp.in_index, dsp.needed_bytes);
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if (dsp.cmd > 0xaf && dsp.cmd < 0xd0) {
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int d0, d1, d2;
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d0 = dsp.in_data[0];
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d1 = dsp.in_data[1];
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d2 = dsp.in_data[2];
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ldebug ("d0 = %d, d1 = %d, d2 = %d\n",
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d0, d1, d2);
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dma_cmd (dsp.cmd, d0, d1 + (d2 << 8));
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}
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else {
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switch (dsp.cmd) {
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case 0x10:
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break;
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case 0x14:
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{
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int d0, d1;
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int save_left;
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int save_pos;
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d0 = dsp.in_data[0];
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d1 = dsp.in_data[1];
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save_left = dsp.left_till_irq;
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save_pos = dsp.dma_pos;
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dma_cmd (0xc0, 0, d0 + (d1 << 8));
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dsp.left_till_irq = save_left;
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dsp.dma_pos = save_pos;
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linfo ("set buffer size data[%d, %d] %d pos %d\n",
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d0, d1, dsp.dma_buffer_size, dsp.dma_pos);
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break;
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}
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case 0x40:
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dsp.time_const = dsp.in_data[0];
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linfo ("set time const %d\n", dsp.time_const);
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break;
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case 0x41:
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case 0x42:
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dsp.freq = dsp.in_data[1] + (dsp.in_data[0] << 8);
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linfo ("set freq %#x, %#x = %d\n",
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dsp.in_data[1], dsp.in_data[0], dsp.freq);
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break;
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case 0x48:
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dsp.dma_buffer_size = dsp.in_data[1] + (dsp.in_data[0] << 8);
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linfo ("set dma len %#x, %#x = %d\n",
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dsp.in_data[1], dsp.in_data[0], dsp.dma_buffer_size);
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break;
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case 0xe0:
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dsp.out_data_len = 1;
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linfo ("data = %#x\n", dsp.in_data[0]);
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dsp.out_data[0] = dsp.in_data[0] ^ 0xff;
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break;
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default:
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goto error;
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}
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}
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dsp.cmd = -1;
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return;
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error:
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Fail ("unrecognized command %#x", dsp.cmd);
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}
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static IO_WRITE_PROTO (dsp_write)
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{
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int iport;
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iport = nport - sb.port;
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switch (iport) {
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case 0x6:
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if (0 == val)
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dsp.v2x6 = 0;
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else if ((1 == val) && (0 == dsp.v2x6)) {
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dsp.v2x6 = 1;
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dsp.out_data[dsp.out_data_len++] = 0xaa;
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}
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else
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dsp.v2x6 = ~0;
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break;
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case 0xc: /* write data or command | write status */
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if (0 == dsp.needed_bytes) {
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command (val);
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if (0 == dsp.needed_bytes) {
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log_dsp (__func__);
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}
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}
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else {
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dsp.in_data[dsp.in_index++] = val;
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if (dsp.in_index == dsp.needed_bytes) {
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dsp.needed_bytes = 0;
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dsp.in_index = 0;
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complete ();
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log_dsp (__func__);
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}
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}
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break;
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default:
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Fail ("(nport=%#x, val=%#x)", nport, val);
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}
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}
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static IO_READ_PROTO (dsp_read)
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{
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char *msg;
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int iport, retval;
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msg = (char *) -1;
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iport = nport - sb.port;
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switch (iport) {
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case 0x6: /* reset */
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return 0;
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case 0xa: /* read data */
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if (dsp.out_data_len) {
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retval = dsp.out_data[--dsp.out_data_len];
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}
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else {
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#if 1
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lwarn ("empty output buffer\n");
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retval = 0;
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#else
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msg = "empty output buffer";
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goto error;
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#endif
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}
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break;
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case 0xc: /* 0 can write */
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retval = 0;
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break;
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case 0xd: /* timer interrupt clear */
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goto error;
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case 0xe: /* data available status | irq 8 ack */
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/* XXX drop pic irq line here? */
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ldebug ("8 ack\n");
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retval = (0 == dsp.out_data_len) ? 0 : 0x80;
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mixer.regs[0x82] &= ~mixer.regs[0x80];
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pic_set_irq (sb.irq, 0);
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break;
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case 0xf: /* irq 16 ack */
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/* XXX drop pic irq line here? */
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ldebug ("16 ack\n");
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retval = 0xff;
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mixer.regs[0x82] &= ~mixer.regs[0x80];
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pic_set_irq (sb.irq, 0);
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break;
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default:
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goto error;
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}
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if ((0xc != iport) && (0xe != iport)) {
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ldebug ("nport=%#x iport %#x = %#x\n",
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nport, iport, retval);
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}
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return retval;
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error:
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Fail ("(nport=%#x) %s", nport, msg);
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}
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static IO_WRITE_PROTO(mixer_write_indexb)
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{
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mixer.nreg = val & 0xff;
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}
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static IO_WRITE_PROTO(mixer_write_datab)
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{
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mixer.regs[mixer.nreg] = val;
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}
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static IO_WRITE_PROTO(mixer_write_indexw)
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{
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mixer_write_indexb (env, nport, val & 0xff);
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mixer_write_datab (env, nport, (val >> 8) & 0xff);
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}
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static IO_READ_PROTO(mixer_read)
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{
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return mixer.regs[mixer.nreg];
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}
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void SB16_run (void)
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{
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if (0 == dsp.speaker)
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return;
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AUD_run ();
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}
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static int write_audio (uint32_t addr, int len, int size)
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{
|
|
int temp, net;
|
|
|
|
temp = size;
|
|
|
|
net = 0;
|
|
|
|
while (temp) {
|
|
int left_till_end;
|
|
int to_copy;
|
|
int copied;
|
|
|
|
left_till_end = len - dsp.dma_pos;
|
|
|
|
to_copy = MIN (temp, left_till_end);
|
|
|
|
copied = AUD_write ((void *) (addr + dsp.dma_pos), to_copy);
|
|
|
|
temp -= copied;
|
|
dsp.dma_pos += copied;
|
|
|
|
if (dsp.dma_pos == len) {
|
|
dsp.dma_pos = 0;
|
|
}
|
|
|
|
net += copied;
|
|
|
|
if (copied != to_copy)
|
|
return net;
|
|
}
|
|
|
|
return net;
|
|
}
|
|
|
|
static int SB_read_DMA (uint32_t addr, int size, int *_irq)
|
|
{
|
|
int free, till, copy, written;
|
|
|
|
if (0 == dsp.speaker)
|
|
return 0;
|
|
|
|
if (dsp.left_till_irq < 0) {
|
|
dsp.left_till_irq += dsp.dma_buffer_size;
|
|
return dsp.dma_pos;
|
|
}
|
|
|
|
free = AUD_get_free ();
|
|
|
|
if ((free <= 0) || (0 == size)) {
|
|
return dsp.dma_pos;
|
|
}
|
|
|
|
if (mix_block > 0) {
|
|
copy = MIN (free, mix_block);
|
|
}
|
|
else {
|
|
copy = free;
|
|
}
|
|
|
|
till = dsp.left_till_irq;
|
|
|
|
ldebug ("addr:%#010x free:%d till:%d size:%d\n",
|
|
addr, free, till, size);
|
|
if (till <= copy) {
|
|
if (0 == dsp.dma_auto) {
|
|
copy = till;
|
|
}
|
|
}
|
|
|
|
written = write_audio (addr, size, copy);
|
|
dsp.left_till_irq -= written;
|
|
AUD_adjust_estimate (free - written);
|
|
|
|
if (dsp.left_till_irq <= 0) {
|
|
mixer.regs[0x82] |= mixer.regs[0x80];
|
|
if (0 == noirq) {
|
|
ldebug ("request irq\n");
|
|
*_irq = sb.irq;
|
|
}
|
|
|
|
if (0 == dsp.dma_auto) {
|
|
control (0);
|
|
}
|
|
}
|
|
|
|
ldebug ("pos %5d free %5d size %5d till % 5d copy %5d dma size %5d\n",
|
|
dsp.dma_pos, free, size, dsp.left_till_irq, copy,
|
|
dsp.dma_buffer_size);
|
|
|
|
if (dsp.left_till_irq <= 0) {
|
|
dsp.left_till_irq += dsp.dma_buffer_size;
|
|
}
|
|
|
|
return dsp.dma_pos;
|
|
}
|
|
|
|
static int dma_misc_handler (int moo)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static int magic_of_irq (int irq)
|
|
{
|
|
switch (irq) {
|
|
case 2:
|
|
return 1;
|
|
case 5:
|
|
return 2;
|
|
case 7:
|
|
return 4;
|
|
case 10:
|
|
return 8;
|
|
default:
|
|
log ("bad irq %d\n", irq);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
static int irq_of_magic (int magic)
|
|
{
|
|
switch (magic) {
|
|
case 1:
|
|
return 2;
|
|
case 2:
|
|
return 5;
|
|
case 4:
|
|
return 7;
|
|
case 8:
|
|
return 10;
|
|
default:
|
|
log ("bad irq magic %d\n", magic);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
void SB16_init (void)
|
|
{
|
|
int i;
|
|
static const uint8_t dsp_write_ports[] = {0x6, 0xc};
|
|
static const uint8_t dsp_read_ports[] = {0x6, 0xa, 0xc, 0xd, 0xe, 0xf};
|
|
|
|
mixer.regs[0x0e] = ~0;
|
|
mixer.regs[0x80] = magic_of_irq (sb.irq);
|
|
mixer.regs[0x81] = 0x20 | (sb.dma << 1);
|
|
|
|
DEREF (irq_of_magic);
|
|
|
|
for (i = 0x30; i < 0x48; i++) {
|
|
mixer.regs[i] = 0x20;
|
|
}
|
|
|
|
for (i = 0; i < LENOFA (dsp_write_ports); i++) {
|
|
register_ioport_write (sb.port + dsp_write_ports[i], 1, dsp_write, 1);
|
|
}
|
|
|
|
for (i = 0; i < LENOFA (dsp_read_ports); i++) {
|
|
register_ioport_read (sb.port + dsp_read_ports[i], 1, dsp_read, 1);
|
|
}
|
|
|
|
register_ioport_write (sb.port + 0x4, 1, mixer_write_indexb, 1);
|
|
register_ioport_write (sb.port + 0x4, 1, mixer_write_indexw, 2);
|
|
register_ioport_read (sb.port + 0x5, 1, mixer_read, 1);
|
|
register_ioport_write (sb.port + 0x5, 1, mixer_write_datab, 1);
|
|
|
|
DMA_register_channel (sb.hdma, SB_read_DMA, dma_misc_handler);
|
|
DMA_register_channel (sb.dma, SB_read_DMA, dma_misc_handler);
|
|
}
|