scsi.h File Reference

Low-level control of the KING processor's SCSI controller. More...

#include <eris/types.h>

Go to the source code of this file.

Enumerations
enum	scsi_low_phase {   SCSI_LOW_PHASE_BUS_FREE = 0, SCSI_LOW_PHASE_SELECT = 1, SCSI_LOW_PHASE_DATA_OUT = 2, SCSI_LOW_PHASE_DATA_IN = 3,   SCSI_LOW_PHASE_COMMAND = 4, SCSI_LOW_PHASE_STATUS = 5, SCSI_LOW_PHASE_MESSAGE_OUT = 6, SCSI_LOW_PHASE_MESSAGE_IN = 7,   SCSI_LOW_PHASE_ILLEGAL = 8 }
enum	scsi_low_status {   SCSI_LOW_STATUS_MISC = -5, SCSI_LOW_STATUS_NEED_MESSAGE = -4, SCSI_LOW_STATUS_NEED_DATA = -3, SCSI_LOW_STATUS_HAVE_DATA = -2,   SCSI_LOW_STATUS_IN_PROGRESS = -1, SCSI_LOW_STATUS_GOOD = 0x0, SCSI_LOW_STATUS_CHECK_CONDITION = 0x2, SCSI_LOW_STATUS_CONDITION_MET = 0x4,   SCSI_LOW_STATUS_BUSY = 0x6, SCSI_LOW_STATUS_INTERMEDIATE = 0x10 }
enum	scsi_low_cmd {   SCSI_LOW_CMD_TEST_UNIT_READY = 0x00, SCSI_LOW_CMD_REQ_SENSE = 0x03, SCSI_LOW_CMD_READ10 = 0x28, SCSI_LOW_CMD_SEEK10 = 0x2B,   SCSI_LOW_CMD_PREFETCH10 = 0x34, SCSI_LOW_CMD_READ_SUBQ = 0x42, SCSI_LOW_CMD_READ_TOC = 0x43, SCSI_LOW_CMD_READ_HEADER = 0x44,   SCSI_LOW_CMD_PLAY_AUDIO_INDEX = 0x48, SCSI_LOW_CMD_PAUSE = 0x4B }
Functions
scsi_low_phase	eris_low_scsi_get_phase (void)
	Get SCSI phase.
scsi_low_status	eris_low_scsi_status (void)
	Get SCSI status.
void	eris_low_scsi_reset (void)
	Reset the SCSI drive.
u32	eris_low_scsi_data_in (u8 *buf, u32 maxlen)
	Read data from the SCSI drive.
u32	eris_low_scsi_data_out (u8 *buf, u32 len)
	Write data to the SCSI drive.
void	eris_low_scsi_begin_dma (u32 kram_addr, u32 size)
	Begin a DMA from the SCSI drive.
int	eris_low_scsi_check_dma (void)
	Check if a DMA is in progress.
void	eris_low_scsi_finish_dma (void)
	Finish a DMA from the SCSI drive.
void	eris_low_scsi_abort (void)
	Abort the current SCSI operation.
int	eris_low_scsi_command (u8 *cdb, u32 len)
	Send a command to the SCSI drive.

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Detailed Description

Low-level control of the KING processor's SCSI controller.

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Function Documentation

void eris_low_scsi_begin_dma	(	u32	kram_addr,
		u32	size
	)

Begin a DMA from the SCSI drive.

Parameters:

kram_addr	Address in KRAM to DMA to.
size	How many bytes to transfer (must be a multiple of 2).

int eris_low_scsi_check_dma

(

void

)

Check if a DMA is in progress.

Returns:

1 if a DMA is in progress, 0 if not.

int eris_low_scsi_command	(	u8 *	cdb,
		u32	len
	)

Send a command to the SCSI drive.

Parameters:

cdb	Command bytes.
len	Length of the command data.

u32 eris_low_scsi_data_in	(	u8 *	buf,
		u32	maxlen
	)

Read data from the SCSI drive.

Parameters:

buf	Buffer to read into.
maxlen	Maximum length to read from.

Returns:

Bytes read.

u32 eris_low_scsi_data_out	(	u8 *	buf,
		u32	len
	)

Write data to the SCSI drive.

Parameters:

buf	Buffer to write from.
len	Length of the buffer.

scsi_low_phase eris_low_scsi_get_phase

(

void

)

Get SCSI phase.

Returns:

Returns the current phase of the SCSI drive.

scsi_low_status eris_low_scsi_status

(

void

)

Get SCSI status.

Returns:

Returns the current state of the SCSI drive.