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minix/drivers/sb16/sb16.h
Cristiano Giuffrida 1f5841c8ed Basic System Event Framework (SEF) with ping and live update. 
SYSLIB CHANGES:
- SEF must be used by every system process and is thereby part of the system
library.
- The framework provides a receive() interface (sef_receive) for system
processes to automatically catch known system even messages and process them.
- SEF provides a default behavior for each type of system event, but allows
system processes to register callbacks to override the default behavior.
- Custom (local to the process) or predefined (provided by SEF) callback
implementations can be registered to SEF.
- SEF currently includes support for 2 types of system events:
  1. SEF Ping. The event occurs every time RS sends a ping to figure out
  whether a system process is still alive. The default callback implementation
  provided by SEF is to notify RS back to let it know the process is alive
  and kicking.
  2. SEF Live update. The event occurs every time RS sends a prepare to update
  message to let a system process know an update is available and to prepare
  for it. The live update support is very basic for now. SEF only deals with
  verifying if the prepare state can be supported by the process, dumping the
  state for debugging purposes, and providing an event-driven programming
  model to the process to react to state changes check-in when ready to update.
- SEF should be extended in the future to integrate support for more types of
system events. Ideally, all the cross-cutting concerns should be integrated into
SEF to avoid duplicating code and ease extensibility. Examples include:
  * PM notify messages primarily used at shutdown.
  * SYSTEM notify messages primarily used for signals.
  * CLOCK notify messages used for system alarms.
  * Debug messages. IS could still be in charge of fkey handling but would
  forward the debug message to the target process (e.g. PM, if the user
  requested debug information about PM). SEF would then catch the message and
  do nothing unless the process has registered an appropriate callback to
  deal with the event. This simplifies the programming model to print debug
  information, avoids duplicating code, and reduces the effort to print
  debug information.

SYSTEM PROCESSES CHANGES:
- Every system process registers SEF callbacks it needs to override the default
system behavior and calls sef_startup() right after being started.
- sef_startup() does almost nothing now, but will be extended in the future to
support callbacks of its own to let RS control and synchronize with every
system process at initialization time.
- Every system process calls sef_receive() now rather than receive() directly,
to let SEF handle predefined system events.

RS CHANGES:
- RS supports a basic single-component live update protocol now, as follows:
  * When an update command is issued (via "service update *"), RS notifies the
  target system process to prepare for a specific update state.
  * If the process doesn't respond back in time, the update is aborted.
  * When the process responds back, RS kills it and marks it for refreshing.
  * The process is then automatically restarted as for a buggy process and can
  start running again.
  * Live update is currently prototyped as a controlled failure.
2009-12-21 14:12:21 +00:00

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#ifndef SB16_H
#define SB16_H
#include "../drivers.h"
#include <sys/ioc_sound.h>
#include <minix/sound.h>
#define SB_TIMEOUT 32000 /* timeout count */
/* IRQ, base address and DMA channels */
#define SB_IRQ 7
#define SB_BASE_ADDR 0x220 /* 0x210, 0x220, 0x230, 0x240,
* 0x250, 0x260, 0x280
*/
#define SB_DMA_8 1 /* 0, 1, 3 */
#define SB_DMA_16 5 /* 5, 6, 7 */
#if _WORD_SIZE == 2
#define DMA_SIZE 8192 /* Dma buffer MUST BE MULTIPLE OF 2 */
#else
#define DMA_SIZE (64 * 1024) /* Dma buffer MUST BE MULTIPLE OF 2 */
#endif
/* Some defaults for the DSP */
#define DEFAULT_SPEED 22050 /* Sample rate */
#define DEFAULT_BITS 8 /* Nr. of bits */
#define DEFAULT_SIGN 0 /* 0 = unsigned, 1 = signed */
#define DEFAULT_STEREO 0 /* 0 = mono, 1 = stereo */
/* DMA port addresses */
#define DMA8_ADDR ((SB_DMA_8 & 3) << 1) + 0x00
#define DMA8_COUNT ((SB_DMA_8 & 3) << 1) + 0x01
#define DMA8_MASK 0x0A
#define DMA8_MODE 0x0B
#define DMA8_CLEAR 0x0C
/* If after this preprocessing stuff DMA8_PAGE is not defined
* the 8-bit DMA channel specified is not valid
*/
#if SB_DMA_8 == 0
# define DMA8_PAGE 0x87
#else
# if SB_DMA_8 == 1
# define DMA8_PAGE 0x83
# else
# if SB_DMA_8 == 3
# define DMA8_PAGE 0x82
# endif
# endif
#endif
#define DMA16_ADDR ((SB_DMA_16 & 3) << 2) + 0xC0
#define DMA16_COUNT ((SB_DMA_16 & 3) << 2) + 0xC2
#define DMA16_MASK 0xD4
#define DMA16_MODE 0xD6
#define DMA16_CLEAR 0xD8
/* If after this preprocessing stuff DMA16_PAGE is not defined
* the 16-bit DMA channel specified is not valid
*/
#if SB_DMA_16 == 5
# define DMA16_PAGE 0x8B
#else
# if SB_DMA_16 == 6
# define DMA16_PAGE 0x89
# else
# if SB_DMA_16 == 7
# define DMA16_PAGE 0x8A
# endif
# endif
#endif
/* DMA modes */
#define DMA16_AUTO_PLAY 0x58 + (SB_DMA_16 & 3)
#define DMA16_AUTO_REC 0x54 + (SB_DMA_16 & 3)
#define DMA8_AUTO_PLAY 0x58 + SB_DMA_8
#define DMA8_AUTO_REC 0x54 + SB_DMA_8
/* IO ports for soundblaster */
#define DSP_RESET 0x6 + SB_BASE_ADDR
#define DSP_READ 0xA + SB_BASE_ADDR
#define DSP_WRITE 0xC + SB_BASE_ADDR
#define DSP_COMMAND 0xC + SB_BASE_ADDR
#define DSP_STATUS 0xC + SB_BASE_ADDR
#define DSP_DATA_AVL 0xE + SB_BASE_ADDR
#define DSP_DATA16_AVL 0xF + SB_BASE_ADDR
#define MIXER_REG 0x4 + SB_BASE_ADDR
#define MIXER_DATA 0x5 + SB_BASE_ADDR
#define OPL3_LEFT 0x0 + SB_BASE_ADDR
#define OPL3_RIGHT 0x2 + SB_BASE_ADDR
#define OPL3_BOTH 0x8 + SB_BASE_ADDR
/* DSP Commands */
#define DSP_INPUT_RATE 0x42 /* set input sample rate */
#define DSP_OUTPUT_RATE 0x41 /* set output sample rate */
#define DSP_CMD_SPKON 0xD1 /* set speaker on */
#define DSP_CMD_SPKOFF 0xD3 /* set speaker off */
#define DSP_CMD_DMA8HALT 0xD0 /* halt DMA 8-bit operation */
#define DSP_CMD_DMA8CONT 0xD4 /* continue DMA 8-bit operation */
#define DSP_CMD_DMA16HALT 0xD5 /* halt DMA 16-bit operation */
#define DSP_CMD_DMA16CONT 0xD6 /* continue DMA 16-bit operation */
#define DSP_GET_VERSION 0xE1 /* get version number of DSP */
#define DSP_CMD_8BITAUTO_IN 0xCE /* 8 bit auto-initialized input */
#define DSP_CMD_8BITAUTO_OUT 0xC6 /* 8 bit auto-initialized output */
#define DSP_CMD_16BITAUTO_IN 0xBE /* 16 bit auto-initialized input */
#define DSP_CMD_16BITAUTO_OUT 0xB6 /* 16 bit auto-initialized output */
#define DSP_CMD_IRQREQ8 0xF2 /* Interrupt request 8 bit */
#define DSP_CMD_IRQREQ16 0xF3 /* Interrupt request 16 bit */
/* DSP Modes */
#define DSP_MODE_MONO_US 0x00 /* Mono unsigned */
#define DSP_MODE_MONO_S 0x10 /* Mono signed */
#define DSP_MODE_STEREO_US 0x20 /* Stereo unsigned */
#define DSP_MODE_STEREO_S 0x30 /* Stereo signed */
/* MIXER commands */
#define MIXER_RESET 0x00 /* Reset */
#define MIXER_DAC_LEVEL 0x04 /* Used for detection only */
#define MIXER_MASTER_LEFT 0x30 /* Master volume left */
#define MIXER_MASTER_RIGHT 0x31 /* Master volume right */
#define MIXER_DAC_LEFT 0x32 /* Dac level left */
#define MIXER_DAC_RIGHT 0x33 /* Dac level right */
#define MIXER_FM_LEFT 0x34 /* Fm level left */
#define MIXER_FM_RIGHT 0x35 /* Fm level right */
#define MIXER_CD_LEFT 0x36 /* Cd audio level left */
#define MIXER_CD_RIGHT 0x37 /* Cd audio level right */
#define MIXER_LINE_LEFT 0x38 /* Line in level left */
#define MIXER_LINE_RIGHT 0x39 /* Line in level right */
#define MIXER_MIC_LEVEL 0x3A /* Microphone level */
#define MIXER_PC_LEVEL 0x3B /* Pc speaker level */
#define MIXER_OUTPUT_CTRL 0x3C /* Output control */
#define MIXER_IN_LEFT 0x3D /* Input control left */
#define MIXER_IN_RIGHT 0x3E /* Input control right */
#define MIXER_GAIN_IN_LEFT 0x3F /* Input gain control left */
#define MIXER_GAIN_IN_RIGHT 0x40 /* Input gain control right */
#define MIXER_GAIN_OUT_LEFT 0x41 /* Output gain control left */
#define MIXER_GAIN_OUT_RIGHT 0x42 /* Output gain control rigth */
#define MIXER_AGC 0x43 /* Automatic gain control */
#define MIXER_TREBLE_LEFT 0x44 /* Treble left */
#define MIXER_TREBLE_RIGHT 0x45 /* Treble right */
#define MIXER_BASS_LEFT 0x46 /* Bass left */
#define MIXER_BASS_RIGHT 0x47 /* Bass right */
#define MIXER_SET_IRQ 0x80 /* Set irq number */
#define MIXER_SET_DMA 0x81 /* Set DMA channels */
#define MIXER_IRQ_STATUS 0x82 /* Irq status */
/* Mixer constants */
#define MIC 0x01 /* Microphone */
#define CD_RIGHT 0x02
#define CD_LEFT 0x04
#define LINE_RIGHT 0x08
#define LINE_LEFT 0x10
#define FM_RIGHT 0x20
#define FM_LEFT 0x40
/* DSP constants */
#define DMA_NR_OF_BUFFERS 2
#define DSP_MAX_SPEED 44100 /* Max sample speed in KHz */
#define DSP_MIN_SPEED 4000 /* Min sample speed in KHz */
#define DSP_MAX_FRAGMENT_SIZE DMA_SIZE / DMA_NR_OF_BUFFERS /* Maximum fragment size */
#define DSP_MIN_FRAGMENT_SIZE 1024 /* Minimum fragment size */
#define DSP_NR_OF_BUFFERS 8
/* Number of bytes you can DMA before hitting a 64K boundary: */
#define dma_bytes_left(phys) \
((unsigned) (sizeof(int) == 2 ? 0 : 0x10000) - (unsigned) ((phys) & 0xFFFF))
_PROTOTYPE(int mixer_set, (int reg, int data));
_PROTOTYPE( int sb16_inb, (int port) );
_PROTOTYPE( void sb16_outb, (int port, int value) );
#endif /* SB16_H */
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