aica: Firmware for the sound card in the Sega Dreamcast
-Version: Based on commit 832ea65b43c8b402f19f3b6b3ecb8804f73c948a
-dated 17 May 2018
+Version: Based on commit fae2358ca346842f3f4d36237be3994fe6135139
+dated 7 October 2020
License: KOS License (see README.KOS)
uint32 freq_lo, freq_base = 5644800;
int freq_hi = 7;
- uint32 i;
uint32 playCont;
/* Stop the channel (if it's already playing) */
/* Write resulting values */
CHNREG32(ch, 24) = (freq_hi << 11) | (freq_lo & 1023);
- /* Set volume, pan */
+ /* Convert the incoming pan into a hardware value and set it */
CHNREG8(ch, 36) = calc_aica_pan(pan);
CHNREG8(ch, 37) = 0xf;
/* turn off Low Pass Filter (LPF) */
CHNREG8(ch, 40) = 0x24;
- /* Convert the incoming volume and pan into hardware values */
- /* Vol starts at zero so we can ramp */
- CHNREG8(ch, 41) = 0xff;
+ /* Convert the incoming volume into a hardware value and set it */
+ CHNREG8(ch, 41) = calc_aica_vol(vol);
/* If we supported volume envelopes (which we don't yet) then
this value would set that up. The top 4 bits determine the
also set the bits to start playback here. */
CHNREG32(ch, 4) = smpptr & 0xffff;
playCont = (mode << 7) | (smpptr >> 16);
- vol = calc_aica_vol(vol);
if(loopflag)
playCont |= 0x0200;
if(delay) {
CHNREG32(ch, 0) = playCont; /* key off */
- CHNREG8(ch, 41) = vol;
}
else {
CHNREG32(ch, 0) = 0xc000 | playCont; /* key on */
-
- /* ramp up the volume */
- for(i = 0xff; i >= vol; i--)
- CHNREG8(ch, 41) = i;
}
}
#ifndef __ARM_AICA_CMD_IFACE_H
#define __ARM_AICA_CMD_IFACE_H
-#ifndef __ARCH_TYPES_H
-typedef unsigned long uint8;
-typedef unsigned long uint32;
-#endif
-
-/* Command queue; one of these for passing data from the SH-4 to the
- AICA, and another for the other direction. If a command is written
- to the queue and it is longer than the amount of space between the
- head point and the queue size, the command will wrap around to
- the beginning (i.e., queue commands _can_ be split up). */
-typedef struct aica_queue {
- uint32 head; /* Insertion point offset (in bytes) */
- uint32 tail; /* Removal point offset (in bytes) */
- uint32 size; /* Queue size (in bytes) */
- uint32 valid; /* 1 if the queue structs are valid */
- uint32 process_ok; /* 1 if it's ok to process the data */
- uint32 data; /* Pointer to queue data buffer */
-} aica_queue_t;
-
-/* Command queue struct for commanding the AICA from the SH-4 */
-typedef struct aica_cmd {
- uint32 size; /* Command data size in dwords */
- uint32 cmd; /* Command ID */
- uint32 timestamp; /* When to execute the command (0 == now) */
- uint32 cmd_id; /* Command ID, for cmd/response pairs, or channel id */
- uint32 misc[4]; /* Misc Parameters / Padding */
- uint8 cmd_data[]; /* Command data */
-} aica_cmd_t;
-
-/* Maximum command size -- 256 dwords */
-#define AICA_CMD_MAX_SIZE 256
-
-/* This is the cmd_data for AICA_CMD_CHAN. Make this 16 dwords long
- for two aica bus queues. */
-typedef struct aica_channel {
- uint32 cmd; /* Command ID */
- uint32 base; /* Sample base in RAM */
- uint32 type; /* (8/16bit/ADPCM) */
- uint32 length; /* Sample length */
- uint32 loop; /* Sample looping */
- uint32 loopstart; /* Sample loop start */
- uint32 loopend; /* Sample loop end */
- uint32 freq; /* Frequency */
- uint32 vol; /* Volume 0-255 */
- uint32 pan; /* Pan 0-255 */
- uint32 pos; /* Sample playback pos */
- uint32 pad[5]; /* Padding */
-} aica_channel_t;
-
-/* Declare an aica_cmd_t big enough to hold an aica_channel_t
- using temp name T, aica_cmd_t name CMDR, and aica_channel_t name CHANR */
-#define AICA_CMDSTR_CHANNEL(T, CMDR, CHANR) \
- uint8 T[sizeof(aica_cmd_t) + sizeof(aica_channel_t)]; \
- aica_cmd_t * CMDR = (aica_cmd_t *)T; \
- aica_channel_t * CHANR = (aica_channel_t *)(CMDR->cmd_data);
-#define AICA_CMDSTR_CHANNEL_SIZE ((sizeof(aica_cmd_t) + sizeof(aica_channel_t))/4)
-
-/* Command values (for aica_cmd_t) */
-#define AICA_CMD_NONE 0x00000000 /* No command (dummy packet) */
-#define AICA_CMD_PING 0x00000001 /* Check for signs of life */
-#define AICA_CMD_CHAN 0x00000002 /* Perform a wavetable action */
-#define AICA_CMD_SYNC_CLOCK 0x00000003 /* Reset the millisecond clock */
-
-/* Response values (for aica_cmd_t) */
-#define AICA_RESP_NONE 0x00000000
-#define AICA_RESP_PONG 0x00000001 /* Response to CMD_PING */
-#define AICA_RESP_DBGPRINT 0x00000002 /* Entire payload is a null-terminated string */
-
-/* Command values (for aica_channel_t commands) */
-#define AICA_CH_CMD_MASK 0x0000000f
-
-#define AICA_CH_CMD_NONE 0x00000000
-#define AICA_CH_CMD_START 0x00000001
-#define AICA_CH_CMD_STOP 0x00000002
-#define AICA_CH_CMD_UPDATE 0x00000003
-
-/* Start values */
-#define AICA_CH_START_MASK 0x00300000
-
-#define AICA_CH_START_DELAY 0x00100000 /* Set params, but delay key-on */
-#define AICA_CH_START_SYNC 0x00200000 /* Set key-on for all selected channels */
-
-/* Update values */
-#define AICA_CH_UPDATE_MASK 0x000ff000
-
-#define AICA_CH_UPDATE_SET_FREQ 0x00001000 /* frequency */
-#define AICA_CH_UPDATE_SET_VOL 0x00002000 /* volume */
-#define AICA_CH_UPDATE_SET_PAN 0x00004000 /* panning */
-
-/* Sample types */
-#define AICA_SM_8BIT 1
-#define AICA_SM_16BIT 0
-#define AICA_SM_ADPCM 2
-
+#include "aica_comm.h"
/* This is where our SH-4/AICA comm variables go... */
--- /dev/null
+/* KallistiOS ##version##
+
+ aica_comm.h
+ Copyright (C) 2000-2002 Dan Potter
+
+ Structure and constant definitions for the SH-4/AICA interface. This file is
+ included from both the ARM and SH-4 sides of the fence.
+*/
+
+#ifndef __DC_SOUND_AICA_COMM_H
+#define __DC_SOUND_AICA_COMM_H
+
+#ifndef __ARCH_TYPES_H
+typedef unsigned long uint8;
+typedef unsigned long uint32;
+#endif
+
+/* Command queue; one of these for passing data from the SH-4 to the
+ AICA, and another for the other direction. If a command is written
+ to the queue and it is longer than the amount of space between the
+ head point and the queue size, the command will wrap around to
+ the beginning (i.e., queue commands _can_ be split up). */
+typedef struct aica_queue {
+ uint32 head; /* Insertion point offset (in bytes) */
+ uint32 tail; /* Removal point offset (in bytes) */
+ uint32 size; /* Queue size (in bytes) */
+ uint32 valid; /* 1 if the queue structs are valid */
+ uint32 process_ok; /* 1 if it's ok to process the data */
+ uint32 data; /* Pointer to queue data buffer */
+} aica_queue_t;
+
+/* Command queue struct for commanding the AICA from the SH-4 */
+typedef struct aica_cmd {
+ uint32 size; /* Command data size in dwords */
+ uint32 cmd; /* Command ID */
+ uint32 timestamp; /* When to execute the command (0 == now) */
+ uint32 cmd_id; /* Command ID, for cmd/response pairs, or channel id */
+ uint32 misc[4]; /* Misc Parameters / Padding */
+ uint8 cmd_data[]; /* Command data */
+} aica_cmd_t;
+
+/* Maximum command size -- 256 dwords */
+#define AICA_CMD_MAX_SIZE 256
+
+/* This is the cmd_data for AICA_CMD_CHAN. Make this 16 dwords long
+ for two aica bus queues. */
+typedef struct aica_channel {
+ uint32 cmd; /* Command ID */
+ uint32 base; /* Sample base in RAM */
+ uint32 type; /* (8/16bit/ADPCM) */
+ uint32 length; /* Sample length */
+ uint32 loop; /* Sample looping */
+ uint32 loopstart; /* Sample loop start */
+ uint32 loopend; /* Sample loop end */
+ uint32 freq; /* Frequency */
+ uint32 vol; /* Volume 0-255 */
+ uint32 pan; /* Pan 0-255 */
+ uint32 pos; /* Sample playback pos */
+ uint32 pad[5]; /* Padding */
+} aica_channel_t;
+
+/* Declare an aica_cmd_t big enough to hold an aica_channel_t
+ using temp name T, aica_cmd_t name CMDR, and aica_channel_t name CHANR */
+#define AICA_CMDSTR_CHANNEL(T, CMDR, CHANR) \
+ uint8 T[sizeof(aica_cmd_t) + sizeof(aica_channel_t)]; \
+ aica_cmd_t * CMDR = (aica_cmd_t *)T; \
+ aica_channel_t * CHANR = (aica_channel_t *)(CMDR->cmd_data);
+#define AICA_CMDSTR_CHANNEL_SIZE ((sizeof(aica_cmd_t) + sizeof(aica_channel_t))/4)
+
+/* Command values (for aica_cmd_t) */
+#define AICA_CMD_NONE 0x00000000 /* No command (dummy packet) */
+#define AICA_CMD_PING 0x00000001 /* Check for signs of life */
+#define AICA_CMD_CHAN 0x00000002 /* Perform a wavetable action */
+#define AICA_CMD_SYNC_CLOCK 0x00000003 /* Reset the millisecond clock */
+
+/* Response values (for aica_cmd_t) */
+#define AICA_RESP_NONE 0x00000000
+#define AICA_RESP_PONG 0x00000001 /* Response to CMD_PING */
+#define AICA_RESP_DBGPRINT 0x00000002 /* Entire payload is a null-terminated string */
+
+/* Command values (for aica_channel_t commands) */
+#define AICA_CH_CMD_MASK 0x0000000f
+
+#define AICA_CH_CMD_NONE 0x00000000
+#define AICA_CH_CMD_START 0x00000001
+#define AICA_CH_CMD_STOP 0x00000002
+#define AICA_CH_CMD_UPDATE 0x00000003
+
+/* Start values */
+#define AICA_CH_START_MASK 0x00300000
+
+#define AICA_CH_START_DELAY 0x00100000 /* Set params, but delay key-on */
+#define AICA_CH_START_SYNC 0x00200000 /* Set key-on for all selected channels */
+
+/* Update values */
+#define AICA_CH_UPDATE_MASK 0x000ff000
+
+#define AICA_CH_UPDATE_SET_FREQ 0x00001000 /* frequency */
+#define AICA_CH_UPDATE_SET_VOL 0x00002000 /* volume */
+#define AICA_CH_UPDATE_SET_PAN 0x00004000 /* panning */
+
+/* Sample types */
+#define AICA_SM_8BIT 1
+#define AICA_SM_16BIT 0
+#define AICA_SM_ADPCM 2
+
+#endif /* !__DC_SOUND_AICA_COMM_H */
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